JP6233120B2 - Duct type air conditioner - Google Patents

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. 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. The first and second heat exchangers arranged in combination with each other so as to form a horizontal V shape in which the air outlet side opens and the air inlet side closes in the air flow passage connecting the air inlet , the air inlet, and the first A first turbofan disposed between the heat exchanger, a second turbofan disposed between the air suction port and the second heat exchanger, and a first driving the first turbofan. and both shaft type motor having a second output shaft for driving the output shaft second turbofan, a first wind direction guide plate for the draft of air sucked from the air inlet to the first turbofan, The air sucked from the air inlet is the second A second wind direction guide plate for guiding to the fan, a part of the back wall of the first wind direction guide plate and the second wind direction guide plate on the side opposite to the air inlet side, and the first heat exchanger and a duct type air conditioner having a partition plate which partitions between the said second heat exchanger first turbofan and the second turbofan, the first wind direction guide plate, the first heat A blowout opening that is expanded in the lateral direction corresponding to the width of the first heat exchanger is formed on the side facing the exchanger, and a suction opening that communicates with the air suction port is formed on the lower surface. The back surface located on the opposite side to the side facing the heat exchanger is closed, the both side surfaces and the upper surface are closed, and the second wind direction guide plate is located on the side facing the second heat exchanger. 2A blowout opening that is expanded in the horizontal direction corresponding to the width of the heat exchanger is formed. , Is formed a suction opening communicating with the air inlet on the top surface, rear surface located on the side opposite to the side of which facing the second heat exchanger is closed, are formed to both side surfaces and the lower surface is closed, It is characterized by that.

The invention according to claim 2 is the duct type air conditioner according to claim 1, wherein the air outlet side of the first and second heat exchangers faces the partition plate. It is characterized by.

The invention according to claim 3 is the duct type air conditioner according to claim 1 or 2, wherein the upper surface of the first wind direction guide plate or the lower surface of the second wind direction guide plate is a part of the casing. It is shared by the department.

The invention according to claim 4 is the duct type air conditioner according to claim 1, 2, or 3,
The suction opening of the first wind direction guide plate is guided to the first turbofan from below along the wind sucked from the air inlet to the rotation axis of the first turbofan, the second wind direction guide plate The suction opening guides the wind sucked from the air suction port to the first turbo fan from above along the rotation axis of the second turbo fan .

  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 housing provided with an air outlet on the front surface and an air suction port on the back surface, and the air outlet side opens in an air flow passage connecting the air inlet and the air outlet in the housing. First and second heat exchangers arranged in combination with each other so as to have a lateral V shape closed on the side, a first turbofan arranged between the air inlet and the first heat exchanger, A second turbofan disposed between the air inlet and the second heat exchanger, a first output shaft for driving the first turbofan, and a second output shaft for driving the second turbofan. and both shaft type motor having a first wind direction guide plate for the draft of air sucked from the air inlet to the first turbofan, guiding the air sucked from the air inlet to the second turbofan A second wind direction guide plate that performs the first The first heat exchanger, the second heat exchanger, the first turbofan, and the second heat direction guide plate are configured to constitute a part of the back wall of the second airflow direction guide plate opposite to the air inlet side. a duct type air conditioner having a partition plate which partitions between the second turbofan,
The first wind direction guide plate is formed with a blow-off opening that is expanded in a lateral direction corresponding to a width of the first heat exchanger on a side facing the first heat exchanger, and the air suction port is formed on a lower surface. A suction opening communicating with the first heat exchanger is formed, a back surface located opposite to the side facing the first heat exchanger is closed, and both side surfaces and an upper surface are closed,
The second airflow direction guide plate is formed with a blowout opening that is expanded in a lateral direction corresponding to a width of the second heat exchanger on a side facing the second heat exchanger, and the air suction port is formed on an upper surface. A suction opening communicating with the second heat exchanger is formed, the back surface located on the opposite side to the side facing the second heat exchanger is closed, and both side surfaces and the lower surface are closed.
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 side opposite to the air outlet side of the first and second heat exchangers faces the partition plate . In the duct type air conditioner according to claim 1 or 2,
The duct type air conditioner , wherein the upper surface of the first wind direction guide plate or the lower surface of the second 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 suction opening of the first wind direction guide plate is guided to the first turbofan from below along the wind sucked from the air inlet to the rotation axis of the first turbofan, the second wind direction guide plate The duct opening air conditioner guides the wind sucked from the air suction port to the first turbo fan from above along the rotation axis of the second turbo fan .

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