JP2014111998A - Heat source unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat source unit capable of reducing input to and noise of an air blower by optimizing the relation between the number of installed air blowers, and the diameter of propeller fans and the height of a unit housing.SOLUTION: The inside of an outdoor unit body 1 is partitioned horizontally with a partition plate 3 into one space as a heat exchange chamber 4A in which a heat exchanger and an air blower are disposed and the other space as a machine chamber 4B in which a compressor is disposed, and a plurality of air blowers 6A-6C are arranged side by side in an up-down direction in the heat exchanger chamber. An air blower comprises a fan motor and propeller fans 6FA-6FC fitted on a rotary shaft of the motor fan, and the relation ν between the number (n) of installed propeller fans, and the height H (mm) of the outdoor unit body and the diameter D (mm) of the propeller fans satisfies an expression (1) of ν=(H-50×(n+1))/D and an expression (2) of n≤ν≤(n+0.5).

Description

  Embodiments described herein relate generally to a heat source unit.

  In general, an outdoor unit of an air conditioner is known as an example of a heat source unit. As an outdoor unit of this type of air conditioner, a rotating shaft of a blower that circulates heat exchange air through a heat exchanger is set in a horizontal direction. There is a horizontal blow type. This type of outdoor unit is configured by a partition plate extending in the vertical direction in the unit housing in a horizontal direction, for example, divided into two spaces, and one of the spaces is configured as a heat exchange chamber in which a heat exchanger and a blower are arranged, The other space is configured as a machine room in which the compressor is arranged.

  However, in this type of conventional outdoor unit for a side-blow type air conditioner, the relationship between the number of installed fans and the diameter of the propeller fan and the height of the unit housing is not optimized. There is a problem that the power consumption and the blowing noise are not reduced.

  The present invention has been made in consideration of such circumstances, and its purpose is to optimize the relationship between the number of installed fans and the diameter of the propeller fan and the height of the unit housing, thereby providing input to the fan. Another object is to provide a heat source unit that can reduce noise.

  According to the present embodiment, the inside of the unit housing is partitioned by the partition plate in the horizontal direction, one of the spaces is a heat exchange chamber in which the heat exchanger and the blower are arranged, and the other space is a machine chamber in which the compressor is arranged. In addition, a plurality of fans are arranged in the heat exchange chamber in the vertical direction.

Further, according to the present embodiment, the blower includes a fan motor and a propeller fan fitted to the rotation shaft of the fan motor, and the number n of the installed propeller fans and the height of the unit housing. The relationship ν between H (mm) and the diameter D (mm) of the propeller fan satisfies the following expressions (1) and (2).
[Equation 1]
ν = (H−50 × (n + 1)) / D (1)
n ≦ ν ≦ (n + 0.5) (2)

The front schematic diagram of the outdoor unit main body (unit housing | casing) and propeller fan of the air conditioner which concern on 1st Embodiment. The plane schematic diagram of the outdoor unit shown in FIG. The side view which mainly shows the support structure of the three propeller fans shown in FIG. The schematic diagram which shows the outdoor unit main body (unit housing | casing) and propeller fan of the air conditioner which concern on 2nd Embodiment. The graph which shows the power saving effect of 1st, 2nd embodiment. The graph which shows the reduction effect of 1st, 2nd embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same or an equivalent part in several drawing.

  FIG. 2 is a schematic plan view of the outdoor unit of the air conditioner according to the first embodiment. As shown in FIG. 2, an outdoor unit A of an air conditioner that is an example of a heat source unit includes a sheet metal outdoor unit body 1 that is an example of a unit housing.

  The outdoor unit main body 1 has a horizontally long bottom plate 1a, a front plate 1b standing on the front side of the bottom plate 1a, a left plate 1c standing on the left side of the bottom plate 1a in the drawing, and standing on the right side. The right plate 1d, the rear plate 1e erected on the back side, and the top plate (not shown) provided over the front, left and right, and the upper ends of the rear plates 1b, 1c, 1d, 1e.

  The front plate 1b is formed with an air outlet 2 in which a bell mouth (not shown) is formed, and a fan guard (not shown) is fitted into the air outlet 2. The left side plate 1c is formed with a plurality of reinforcing steps, and the right side plate 1d is provided with an opening through which piping such as a refrigerant pipe is inserted, and this opening is covered with a packed valve cover.

  The left side plate 1c and the rear plate 1e are provided with crosspieces, and suction ports 1c1 and 1e1 are formed between the crosspieces, and the outside air is sucked into the outdoor unit main body 1 as shown by the large arrows in FIG. It is configured as follows. A top plate consists of a flat plate which has the shoulder part bent along the periphery. The interior of the outdoor unit main body 1 configured in this way is divided into two chambers, a heat exchange chamber 4A and a machine chamber 4B, by a partition plate 3 made of sheet metal. The heat exchange chamber 4A has a larger volume than the machine room 4B.

  In the heat exchange chamber 4A, an L-shaped outdoor heat exchanger 5 is arranged on the bottom plate 1a at a position close to the rear plate 1e in parallel with the rear plate 1e and the left side plate 1c. That is, the outdoor heat exchanger 5 is formed in an L shape in plan view. The upper end of the outdoor heat exchanger 5 is very close to the top plate.

  Furthermore, in the heat exchange chamber 4A, an outdoor fan 6 and a fan support member 7 that supports the outdoor fan 6 are disposed therein. The outdoor blower 6 is disposed so as to be surrounded by the outdoor heat exchanger 5, the partition plate 3, the left side plate 1c, and the front plate 1b, and includes a fan motor 6M and a propeller fan 6F attached to a rotation shaft of the fan motor 6M. Have.

  The blower support member 7 has a pair of left and right inverted L-shaped columns 7a and 7b. As shown in FIG. 3, these columns 7 a and 7 b are bent at the tip end portions (right end portions in FIG. 3) of the upper end portions 7 a 1 and 7 b 1 in a bowl shape, and the rear end corners on the upper end portion of the outdoor heat exchanger 5. Is engaged and fixed. For example, three pairs of horizontal members 7c, 7c, 7c installed in the horizontal direction are arranged in parallel in the vertical direction on the columns 7a, 7b, and these three pairs of horizontal members 7c, 7c, 7c Three fan motors 6M, 6M and 6M are respectively fixed. The lower ends of the columns 7a and 7b are erected on the support base 7d, and the support base 7d is fixed on the bottom plate 1a of the outdoor unit body 1.

  The fan motor 6M has a variable rotational speed, and the propeller fan 6F sucks heat exchange air from the rear side in the axial direction and blows it out from the front outlet 2 to the outside air. That is, the rear plate 1e side and the left side plate 1c side of the opening structure are the outside air suction side, and the outlet 2 of the front plate 1b is the outlet side. The bell mouth guides the outside air at the air outlet 2.

  The machine room 4B accommodates the piping including the compressor 8, a gas-liquid separator (not shown), and a four-way switching valve connected to the compressor 8 and the gas-liquid separator. The compressor 8 and the like are connected to an outdoor heat exchanger 5 in the heat exchange chamber 4A, an indoor heat exchanger accommodated in an indoor unit (not shown), etc. via a refrigerant pipe (not shown) to constitute a refrigeration cycle.

  As shown in FIGS. 1 and 3, the outdoor unit main body 1 has three outdoor fans 6A, 6B, and 6C arranged at a required gap g in the height (unit housing height) H direction. It is installed side by side. These three outdoor fans 6A, 6B, and 6C are fixed and supported at substantially equal intervals in the vertical direction on the fan support member 7 shown in FIG. In addition, even when there are four or more outdoor fans, accurate positioning can be easily performed by fixing and supporting them on the same fan support member extending in the vertical direction.

These outdoor fans 6A to 6C are configured to satisfy the following expressions (1) and (2).
[Equation 2]
ν = (H−50 × (n + 1)) / D (1)
n ≦ ν ≦ (n + 0.5) (2)
Where n is the number of outdoor fans 6 installed
H: Height of outdoor unit body 1 (mm)
D: Diameter of propeller fan 6F (mm)

  In the above formula (1), “50” indicates that when the number of outdoor fans is one, the distance from the upper and lower ends of the outdoor unit body 1 to the outer periphery of the propeller fan 6F is 50 mm or more. It is preferable that, even when a plurality of outdoor fans are installed in the vertical direction, the interval between the outer peripheries of the adjacent propeller fans 6F, 6F is preferably 50 mm or more for improving the blowing efficiency and reducing the blowing noise. This is a new finding that has been discovered and accumulated as a result of our research and development over many years.

  Therefore, for example, when the outdoor unit body 1 has a height H of 1500 mm and three outdoor fans 6A to 6C (propeller fans 6FA, 6FB, 6FC) are arranged in parallel in the height direction of the outdoor unit body 1, the above ( It is preferable that the diameter D of the propeller fans 6FA to 6FC is set to 372 mm or more according to the formulas 1) and (2).

  As shown in FIG. 4, when two outdoor fans 6D and 6E, that is, propeller fans 6FD and 6FE are arranged side by side in the height H direction of the outdoor unit body 1, the diameters of the propeller fans 6FD and 6FE are arranged. It is preferable that D is 540 mm or more.

  FIG. 5 is a graph showing the relationship between ν and input when a plurality of outdoor fans are installed in the outdoor unit main body 1 and operated so as to blow the same air volume.

  That is, FIG. 5 shows the relative relationship when ν when calculated by the above equation (1) is on the horizontal axis and the total electric input (power consumption) W of the fan motor 6M of each outdoor fan is on the vertical axis. In the figure, curve A shows the characteristics when two outdoor fans are installed in the outdoor unit body 1 (2 fans), and curve B shows the characteristics when three outdoor fans are installed (3 fans). Curve C shows the characteristics when four outdoor fans are installed (4 fans). From the above equation (1), the diameter of propeller fan 6F decreases as the value of ν increases.

  Ν satisfying the above expressions (1) and (2) is 2.0 ≦ ν ≦ 2.5 when there are two outdoor fans (2 fans) and when there are three outdoor fans (3 fans). Is 3.0 ≦ ν ≦ 3.5. In FIG. 5, an E region indicated by a broken line is a region where ν exceeds 2.5 in the case of two fans and does not satisfy the above expression (2).

  From FIG. 5, for example, when 2 fans and ν is 2.5, the input is about 290 W, whereas when the ν is more than 2.5, for example 2.8, the input is about 370 W. become. On the other hand, when ν is 3.0 with 3 fans, the input is about 290 W, which is smaller than 370 W.

  Therefore, the input can be made smaller in the case of 3 fans and ν of 3.0 than in the E region in which ν exceeds 2.5 with 2 fans.

  For example, from the above equation (1), when the height H of the outdoor unit body 1 is 1500 mm, the diameter D of the propeller fan 6F when ν is 2.5 with 2 fans (n = 2) is 540 mm. Therefore, when it is necessary to make the diameter D of the propeller fan 6F less than 540 mm due to restrictions on the lateral width of the outdoor unit main body 1, the diameter D of the propeller fan 6F is reduced with two fans (ν is increased by 2.5). It is possible to reduce the input by setting the diameter D of the propeller fan 6F so that ν is 3.0 with 3 fans (n = 3) rather than 3). When the height H of the outdoor unit body 1 is 1500 mm, the diameter D of the propeller fan 6F when ν is 3.0 with 3 fans is 433 mm.

  Similarly, as is apparent from FIG. 5, the input can be made smaller in the case of 4 fans and ν of 4.0 than in the case of 3 fans and ν exceeding 3.5.

  FIG. 6 mainly shows the relationship between ν and the noise value (dB) when the 2 fans, 3 fans, and 4 fans are operated so as to blow with the same air volume. In FIG. 6, the F curve indicates the blowing noise characteristics in the case of two fans, and the G region indicates a region that does not satisfy the above expression (2) with two fans, that is, a region where ν exceeds 2.5. In addition, the H curve indicates the blowing noise characteristics in the case of 3 fans, and the I curve indicates the blowing noise characteristics in the case of 4 fans.

  From FIG. 6, for example, when ν is 2.5 with 2 fans, the noise value is about 62 dB, whereas when the ν is over 2.5, for example 2.8, the noise value is about It becomes about 66 dB. On the other hand, when ν is 3.0 with three fans, the noise value is about 62 dB which is smaller than about 66 dB.

  Therefore, the noise value can be made smaller in the case of 3 fans and ν of 3.0 than in the E region in which ν exceeds 2.5 with 2 fans.

  Similarly, as apparent from FIG. 6, the noise value can be made smaller in the case of 4 fans and ν of 4.0 than in the case of 3 fans and ν exceeding 3.5.

  Therefore, according to this embodiment, when arranging a plurality of outdoor fans in the height H direction (vertical direction) of the outdoor unit body 1, by satisfying the above formulas (1) and (2), When the same air volume is blown, both the input of the fan motor of the outdoor fan and the reduction of the blowing noise can be achieved.

  Further, since the three outdoor fans 6A, 6B, 6C are fixedly supported by the same fan support member 7 extending in the vertical direction, the positioning of the outdoor fans 6A, 6B, 6C can be easily and accurately performed. The intervals between the outdoor fans 6A, 6B, and 6C can be made uniform to further reduce noise.

  As mentioned above, although several embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  A ... outdoor unit (heat source unit), 1 ... outdoor unit body (unit housing), 3 ... partition plate, 4A ... heat exchange chamber, 4B ... machine room, 5 ... outdoor heat exchanger, 6 ... outdoor blower, 6F ... Propeller fan, 6M ... fan motor, 7 ... blower support member, 8 ... compressor.

Claims (2)

The inside of the unit housing is partitioned by a partition plate in the horizontal direction, one of the spaces is used as a heat exchange chamber in which a heat exchanger and a blower are arranged, the other space is used as a machine room in which a compressor is arranged, and the blower is exchanged with the heat. In the heat source unit arranged in the room in the vertical direction,
The blower includes a fan motor and a propeller fan fitted to the rotation shaft of the fan motor. The number n of the installed propeller fans, the height H (mm) of the unit housing, and the propeller fan A heat source unit, characterized in that a relationship ν with a diameter D (mm) satisfies the following expressions (1) and (2).
[Equation 1]
ν = (H−50 × (n + 1)) / D (1)
n ≦ ν ≦ (n + 0.5) (2) The heat source unit according to claim 1, wherein three or more fans are provided facing the heat exchanger and are fixed to the same support member extending in the vertical direction.

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