JP2013122335A - Air conditioner - Google Patents

Abstract

In an air conditioner (100), air inside an outdoor unit (20) 2 smoothly flows without stagnation, enabling efficient heat exchange in a heat exchanger (42), and a fan of the outdoor unit (20). Contributes to reducing power consumption and reducing noise.
[Solution]
The internal space of the housing 2 includes a first space A in which the air inlet 2a and the air outlet 2b are included and the heat exchanger 42 of the air conditioning cycle related equipment 4 is accommodated, and the other second spaces B. The partition member 5 is provided so that the surface of the partition member 5 on the air inlet 2a side gradually rises from the bottom to the top.
[Selection] Figure 4

Description

  The present invention relates to an air conditioner having an outdoor unit that accommodates air-conditioning cycle related equipment such as a heat exchanger, a compressor, an accumulator, and an electric circuit, and in particular, an air inflow port and an upper surface on a side peripheral surface of the outdoor unit. The present invention relates to an apparatus suitably applied to an air conditioner having an air outlet.

  As shown in FIGS. 1 and 2, the casing 2 of the outdoor unit in this type of air conditioner having an air inlet 2 a on the side circumferential surface and an air outlet 2 b on the upper surface is provided with a component other than the heat exchanger 42. The compressor 41, the accumulator 43, the electric circuit device 46, the piping 44, and other auxiliary devices are accommodated.

  Then, the suction-type blower 3 provided at the air outlet 2b causes the air to flow through the internal space of the outdoor unit housing 2 from the air inlet 2a toward the air outlet 2b. The heat exchanger 42 provided to face the air inlet 2a is configured to hit.

JP 2009-85483 A

  However, as described above, since the compressor, accumulator, electric circuit, piping, and other auxiliary devices are accommodated inside the outdoor unit housing in addition to the heat exchanger, as shown in FIG. These devices disturb the air flow and increase the ventilation resistance in the housing. As a result, there arise problems that the heat exchange efficiency in the heat exchanger is deteriorated, the power consumption of the blower is increased, or noise is generated.

  On the other hand, for example, in an outdoor unit casing of a vertically long rectangular parallelepiped, an outdoor unit having a configuration in which a heat exchanger is arranged on an upper part of a compressor or the like and is partitioned by a horizontal plate is disclosed in, for example, Patent Literature 1 in FIG.

  If this is the case, it is possible to surely prevent the flow of air from being obstructed by equipment other than the heat exchanger, but it is a configuration in which a rectangular parallelepiped room is simply partitioned horizontally, and the heat exchanger Since the shape of the room that contains the air still maintains a rectangular parallelepiped shape, the air flow collides with the vertical standing wall of the room, creating turbulence, or the air flow is stagnant at the corner of the room In other words, it cannot be said that the air flow becomes smooth, and the above problem cannot be solved sufficiently.

  The present invention has been made to solve the above-described problems, and the air inside the outdoor unit housing holding the heat exchanger flows smoothly and without stagnation, so that the efficiency in the heat exchanger can be improved. It is intended to enable good heat exchange and to contribute to reducing the power consumption and noise reduction of the blower in the outdoor unit.

  That is, the air conditioner according to the present invention has an upper surface, a bottom surface, and a side peripheral surface, and an air inflow port is formed at a predetermined position on the side peripheral surface, and an air outflow port is formed at a predetermined position on the upper surface. A housing configured to generate an air flow from the air inlet to the air outlet by a blower disposed in the air-conditioning apparatus, an air-conditioning cycle related device housed in the housing, and an internal space of the housing A partition member that includes the air inlet and the air outlet and that partitions the first space in which the heat exchanger of the air-conditioning cycle-related equipment is accommodated and the other second space; The surface of the member on the air inlet side is configured to gradually stand up from the lower side to the upper side.

  In such a case, the first space and the second space are partitioned inside the housing by the partition member, and the heat exchanger is accommodated in the first space including the air inlet and the air outlet. Therefore, by accommodating other air conditioning cycle related equipment that substantially impedes the flow of air for heat exchange in the second space, the adverse effect on heat exchange by the other air conditioning cycle related equipment is reduced. Can be eliminated.

  In addition, since the surface of the partition member facing the air inlet side gradually rises from the bottom to the top, the air flowing into the first space collides with the surface of the partition member. Without causing any turbulent flow or stagnation, the air will flow along the surface of the partition member while changing the direction gradually upward toward the upper air outlet.

  Therefore, it is possible to create an extremely smooth air flow in the first space where the heat exchanger is arranged, and to ensure the efficient operation of the heat exchanger, as well as reducing fan power consumption and noise reduction. Can also contribute.

  In the case where the blower has rotor blades, in order to increase the theoretical total pressure in the blower and allow air to flow more efficiently, a pre-swirl is provided on the surface of the partition member, and the extending direction of the pre-swirl Is preferably inclined in the same direction as the inclination direction on the surface of the partition member of the spiral air flow caused by the rotor blades.

  Other air-conditioning cycle related equipment that substantially hinders the flow of air for heat exchange can include a compressor, an accumulator, and an electric circuit, and these should be accommodated in the second space. Is desirable.

  According to the present invention configured as described above, it is possible to create an extremely smooth air flow in the first space in which the heat exchanger is arranged, to ensure efficient operation of the heat exchanger, and to reduce noise. And can contribute to reduction of power consumption of the blower.

The schematic front view which shows the internal structure of the outdoor unit in the conventional air conditioning apparatus, and the flow of air. The schematic plan view which shows the internal structure of the outdoor unit in the conventional air conditioning apparatus. The whole schematic diagram of the air harmony device in one embodiment of the present invention. The schematic side view which shows the internal structure of the outdoor unit in the embodiment. The partition member is broken. The schematic front view which shows the internal structure of the outdoor unit in the embodiment. The schematic plan view which shows the internal structure of the outdoor unit in the embodiment. The typical perspective view of the partition member in the embodiment. The vector figure which shows the flow direction of the air when not performing pre-swivel and when performing pre-swivel. The schematic side view which shows the flow of the air in other embodiment of this invention. The partition member is broken. The schematic plan view which shows the internal structure of the outdoor unit in other embodiment of this invention. The schematic front view which shows the internal structure of the outdoor unit in the embodiment. The schematic side view which shows the internal structure of the outdoor unit in other embodiment of this invention. The partition member is broken.

  Hereinafter, an air conditioner 100 according to an embodiment of the present invention will be described.

  For example, as shown in FIG. 3, the air conditioner 100 is connected so that a plurality of indoor units 10 can circulate refrigerant to one outdoor unit 20 installed on a rooftop of a building or an air conditioner room. This is a multi air conditioner type for buildings in which an air conditioning cycle is formed.

  Therefore, since the feature of this embodiment is the structure of the outdoor unit 20, the outdoor unit 20 will be described in detail below.

  As shown in FIGS. 4 to 7, the outdoor unit 20 has a vertically long rectangular parallelepiped shape, and a housing 2 having a top surface, a bottom surface, and side peripheral surfaces (front surface, right side surface, left side surface, back surface), and the housing 2. And an air-conditioning cycle-related device 4 arranged inside.

  The housing 2 has an air inlet 2a opened at the front and left and right side surfaces, and an air outlet 2b opened at the upper surface. The air outlet 2b is provided with, for example, a fan motor 3 which is an axial blower in which a fan and a motor are integrated. 2 is configured such that the air inside can be discharged from the air outlet 2b.

  The air-conditioning cycle related device 4 is a device directly related to the air-conditioning cycle, for example, a compressor 41, an accumulator 43, a heat exchanger 42 (evaporator and condenser), a four-way valve (not shown), a pipe 44, an oil It also includes auxiliary equipment such as a separator 45, a pressure sensor (not shown), and an electric circuit device 46 for control and measurement.

  Among these air-conditioning cycle-related devices 4, the heat exchanger 42 is disposed so as to face the air inlet 2a over the front and left and right side surfaces of the housing 2, and flows through the air inlet 2a. Is configured to hit the heat exchanger 42.

  On the other hand, the other main air-conditioning cycle-related devices 4 other than the heat exchanger 42 are concentrated on the back side of the housing 2 as shown in FIG. Note that reference numeral 47 in FIG. 4 denotes an electrical component box that houses the electrical circuit device 46. However, if the electrical component box is disposed below, the compressor 41, the piping 44, and the like are placed behind the electrical component box. The parts are hidden and cannot be replaced at the time of maintenance. Therefore, the position of the electric box 47 can be changed between the normal time and the maintenance time so that the optimum position of the electrical box 47 can be realized according to each situation. It is.

  Furthermore, in this embodiment, as shown in FIGS. 4-7, the partition member 5 which partitions the housing | casing 2 into two space A, B of a substantially front side and a back side is provided. Among the two spaces A and B, the space on the front side, that is, the first space A includes the air inlet 2a and the air outlet 2b, and the heat exchanger 42 and the pipes 44 before and after the heat exchanger 42. Is to be accommodated. On the other hand, another main air conditioning cycle related device 4 is accommodated in the second space B on the back side.

  Specifically, the partition member 5 (51) is, for example, a plate-like member provided from the bottom surface to the top surface of the housing 2, and in this embodiment, as shown in FIGS. It consists of a member 51, a right side member 52, and a left side member 53.

  The front member 51 has a shape in which a rectangular plate is curved in the thickness direction, and its front side is positioned on the bottom front side of the housing 2 and its upper side is positioned on the upper back side of the housing 2 to The standing angle gradually increases as it goes from the back to the back. In other words, the front member 51 is configured such that the front surface facing the air inlet 2a side gradually rises from the bottom to the top.

The right side member 52 is a plate-like member continuously provided so as to gradually spread to the right side while hanging down from the right side of the front member 51 toward the bottom surface of the housing 2. That is, the right side member 52 is configured such that the surface of the right side facing the air inlet 2a side gradually rises from the lower side to the upper side.
Since the left side member 53 is symmetrical with the right side member 52, description thereof is omitted.

  As shown in FIG. 4, the degree of curvature of the surface of the partition member 5 is a necessary air path curve of the air flowing in the housing 2 (the natural flow of air caused by the fan motor 3) when viewed in cross section. The curve shown).

  Furthermore, in this embodiment, a plurality of pre-swirls 6 are provided on the surface of the partition member 5, and the extending direction of the pre-swivel 6 is determined by the spiral member airflow induced by the fan motor 3. It is tilted in the same direction as the tilt direction. The pre-swivel is formed by protrusions or bottomed grooves provided on the surface of the partition member 5, and in terms of a cross section (a cross section cut in a direction substantially perpendicular to the extending direction of the pre-swivel), ripple Examples include a shape (a wave shape) and a saw wave shape.

  If this is the case, the heat exchanger 42 is disposed in the first space A that is partitioned by the partition member 5 and includes the air inlet 2a and the air outlet 2b. Since most of the air-conditioning cycle related devices 4 are accommodated in the second space B, adverse effects on heat exchange by the other air-conditioning cycle related devices 4 can be eliminated.

  Further, since the surface of the partition member 5 facing the air inlet 2a side is configured to gradually rise from the lower side to the upper side along the required air path curve, the first space A The air that has flowed into the airflow does not cause turbulence or stagnation, and flows along the surface of the partition member 5 while gradually changing the direction upward toward the upper air outlet 2b. It becomes.

  Therefore, it is possible to create an extremely smooth air flow in the first space A in which the heat exchanger 42 is arranged, to ensure efficient operation of the heat exchanger 42 and to reduce fan power consumption. It can also contribute to noise reduction.

  Further, since the pre-swivel 6 is provided on the surface of the partition member 5, the absolute inflow speed (circumferential component) of air to the fan motor 3 can be increased, and the theoretical total pressure of the fan motor 3 can be increased. Can do. As a result, air can flow more efficiently in the housing 2, and the above-described effects become more prominent.

  That is, when there is no pre-turn, the theoretical total pressure is expressed by the following equation (1) as shown in FIG. 8A, whereas when there is a pre-turn, as shown in FIG. The theoretical total pressure is expressed by the equation (2), and as is clear from these, it can be seen that the theoretical total pressure increases with the pre-turn.

No pre-turn: Theoretical total pressure P _th = ρ ・ U ₂・ C _U2 (1)
With pre-turn: Theoretical total pressure P _th = ρ ・ (U ₂・ C _U2 + U ₁・ C _U1 ) (2)

The formula for calculating the theoretical total pressure is shown below.
(a formula)
U ₁ = π ・ D ・ N
_{C Z1 = Q / {π ·} D 2/4 · (1-ν 2)}
^{_{β 1 = tan -1 (U 1}} / C Z1)
C _U1 =-C _Z1 tan (α ₁ ')
Theoretical total pressure P _th = ρ ・ (U ₂・ C _U2 + U ₁・ C _U1 )
(Meaning of each code)
Q: Air volume, N: Number of revolutions, D: Fan outer diameter, ν: Hub ratio, ρ: Air density
U ₁ : Blade inlet peripheral speed (rotational speed)
U ₂ : Blade outlet peripheral speed (rotational speed)
C ₁ : Absolute inflow velocity
C ₂ : Absolute flow rate
C _z1 : Absolute inflow velocity (axial component)
C _z2 : Absolute outflow velocity (axial component)
C _U1 : Absolute inflow velocity (circumferential component)
C _U2 : Absolute outflow velocity (circumferential component)
β ₁ : Blade inlet relative inflow angle β ₂ : Blade outlet relative outflow angle

  Incidentally, as shown in FIG. 9, when the surface of the partition member 5 is not pre-swiveled, there is a possibility that an area AR with a small air volume may be formed at a position far from the air inlet 2a. If this is applied, such problems can be reduced.

In addition, this invention is not limited to the said embodiment, A various deformation | transformation is possible.
For example, the area of the partition member 5 in plan view may be increased as shown in FIGS. Here, the left and right side member 52 has a left and right spread angle θ ′ larger than the spread angle θ (see FIG. 2) in the above embodiment.

In addition, the partition member may have a semicircular or semielliptical contour shape (for example, a shape in which a trumpet is cut in half vertically) as viewed from above. In short, the horizontal distance from the air inlet 2a should be gradually increased as it goes upward. In addition, as a partition member, as shown in FIG. 10, the rising angle may be changed stepwise, or a part where the inclination is changed may be provided only in a part of the partition member.
In the first space, other air conditioning-related equipment may be accommodated as long as the air flow is not significantly hindered.

The air inflow port does not need to be provided on all of the front surface, the right side surface, and the left side surface of the housing, and may be a part thereof. Of course, the shape of the partition member changes depending on the position where the air inlet is provided.
In addition, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 100 ... Air conditioning apparatus 2 ... Housing | casing 2a ... Air inlet 2b ... Air outlet 3 ... Blower (fan motor)
4 ... Air-conditioning cycle related equipment 42 ... Heat exchanger 5 ... Partition member A ... First space B ... Second space

Claims (3)

An air inflow port is formed at a predetermined position on the side peripheral surface, an air outflow port is formed at a predetermined position on the upper surface, and the air flow is provided by a blower disposed at the air outflow port. A housing configured to generate an air flow from the inlet to the air outlet;
Air-conditioning cycle related equipment housed in the housing,
A partition member that divides the internal space of the housing into a first space that includes the air inlet and the air outlet and that houses a heat exchanger of the air-conditioning cycle-related equipment, and another second space. And
An air conditioner characterized in that the air inlet side surface of the partition member is configured to gradually stand up from the lower side toward the upper side.   When the blower has rotor blades, a pre-swirl is provided on the surface of the partition member, and the extending direction of the pre-swirl is the same as the inclination direction of the spiral air flow caused by the rotor blades on the surface of the partition member. The air conditioner according to claim 1, wherein the air conditioner is inclined in a direction.   The air conditioning apparatus according to claim 1 or 2, wherein a compressor, an accumulator, and an electric circuit among the air-conditioning cycle-related devices are accommodated in the second space.