JP4555712B2 - Air conditioner outdoor unit - Google Patents

Description

  The present invention relates to an outdoor unit of an air conditioner, and more particularly to an outdoor unit of an air conditioner having an improved housing structure.

  A conventional outdoor unit of an air conditioner is bent into a U-shape that forms the front and left and right sides of the housing so that an upper opening, a rear opening, and a bottom opening are formed, and an air suction port is provided on one side. Side cabinets, a top plate that closes the upper opening of the housing and constitutes the upper surface, a back plate that closes the rear opening and is provided with a back air inlet, and a lower plate that closes the bottom plate of the housing. Forming a housing with a bottom plate, placing a heat exchanger that bends into an L shape apart from the back plate in the housing, and that houses an AC-driven fan motor, compressor, electrical component box, etc. A machine has been proposed (Patent Documents 1 and 2).

  Since this outdoor unit is configured so that air is sucked into the two sides of the outdoor unit side air inlet and the rear inlet through an L-shaped heat exchanger, the ventilation resistance can be reduced. Because it is placed facing the air intake port, there is a problem that the case becomes large and the outdoor unit becomes large, and conversely, since the suction part is large, it is easily affected by outside wind, It was difficult to always maintain the optimum heat exchange amount. Furthermore, because the fan motor is AC-driven, the air volume cannot be finely adjusted for changes in the air flow temperature around the heat exchanger, so it can be added by adjusting the throttle with an electric expansion valve. Was.

For the purpose of minimizing the influence of external wind, etc., using a flat heat exchanger with the suction part only on the back increases the ventilation resistance in the outdoor unit, and the heat exchange efficiency of the heat exchanger is always improved. It was difficult to finely control the fan motor to maintain it.
Japanese Patent Laid-Open No. 3-99133 JP 2001-99448 A

  The present invention has been made in consideration of the above-described circumstances, and an object thereof is to provide an outdoor unit of an air conditioner that can always maintain the heat exchange efficiency of an upper heat exchanger that can reduce the size of a housing structure. To do.

  In order to achieve the above-described object, an outdoor unit of an air conditioner according to the present invention includes a side cabinet bent into a substantially U shape that constitutes a front surface and left and right side surfaces of a housing, and an upper opening of the housing. In an outdoor unit of an air conditioner in which a casing is formed of a top plate that closes and forms a top surface portion and a bottom plate that forms a bottom surface portion of the casing, heat is exchanged on the bottom plate by a partition plate in the casing. A flat outdoor heat exchanger is provided on the back side of the heat exchanger chamber, which covers the entire rear opening of the housing, and the front side of the outdoor heat exchanger. A propeller fan near the center and a DC-driven fan motor capable of changing the rotational speed are installed, and the machine room accommodates component parts such as a compressor and a throttle device, and the fan motor and the compressor rotate above the machine room. Power to control the number An electrical component box containing control parts is installed, and the side cabinet has an air outlet at the front and a bell mouth integrally formed around the air outlet, and both ends of the left and right side portions are on the back side. It is configured to bend and cover the outer sides of the left and right ends of the outdoor heat exchanger, and is configured to fix and attach only the front surface and the left and right side surfaces to the bottom plate.

  According to the outdoor unit of the air conditioner according to the present invention, it is possible to provide an outdoor unit of an air conditioner that is small and can always maintain the heat exchange efficiency of the heat exchanger.

  Hereinafter, an embodiment of an outdoor unit of an air conditioner according to the present invention will be described with reference to the accompanying drawings.

  1 is a front perspective view of an outdoor unit of an air conditioner according to the present invention, FIG. 2 is a rear perspective view thereof, and FIG. 3 is an exploded perspective view thereof.

  As shown in FIGS. 1 to 3, in the outdoor unit 1 of the air conditioner of the present embodiment, the housing 2 is bent into a substantially U shape that is provided with an air outlet 3 and constitutes a front surface and left and right side surfaces. It is formed of a side cabinet 4, a top plate 6 that closes an upper opening 5 formed at the top of the side cabinet 4 and constitutes the upper surface portion, and a bottom plate 10 that constitutes the bottom surface portion.

  The inside of the housing 2 is divided into a heat exchange chamber 12 and a machine chamber 13 by a partition plate 11 bent in an arc shape.

  In the heat exchange chamber 12, a planar outdoor heat exchanger 8 in which a refrigerant pipe (heat transfer tube) 8 b penetrates a plurality of aluminum fins 8 a closes substantially the entire rear opening 7 of the housing 2. A propeller fan 15 attached to the motor support base 14 and a DC drive fan motor 16 capable of changing the rotation speed are installed near the center of the heat exchange chamber 12 and installed on the back side of the bottom plate 10.

  Forming the outdoor heat exchanger in a planar shape can reduce the width direction of the cabinet, requires no processing such as bending, and further, by making the housing suction port only on the back side, This is to minimize the change in the temperature air volume inside the outdoor unit due to the influence of the wind.

  In addition, the reason why the fan motor driven by DC is used is that the rotation control can be finely performed by electronic control as compared with the conventional single-phase AC motor, and it is possible to cope with the change of the air volume in the machine and the increase of the wind pressure.

  4 and 5 are a front side perspective view and a rear side perspective view of a side cabinet used in the outdoor unit of the air conditioner according to the present invention.

  As shown in FIGS. 4 and 5, in the side cabinet 4 constituting the main part of the housing 2, an air outlet 3 is opened on the front surface 4 a, and a bell mouth 4 b is integrally formed around the air outlet 3. The U-shaped left side surface portion 4c and the right side surface portion 4d are bent at both ends on the back side (back opening side) to form a left side bent portion 4c1 and a right side bent portion 4d1. It is comprised so that the outer side of the right-and-left end plate part of the outdoor heat exchanger 8 may be covered by the parts 4c1 and 4d1. Further, the side cabinet 4 is configured such that only the bottom plate 10 and the front surface 4a and the left and right side surfaces 4c and 4d of the side cabinet 4 are fixed with screws, and the left bent portion 4c1 and the right bent portion bent to the back side. 4d1 is configured not to form a screwing portion. Further, the right side surface 4e forms the side surface of the machine room 13, and an electric wiring terminal (connector) mounting portion 4d2 for the indoor unit side is inclined and formed integrally at the center portion thereof, and a pipe connection is formed at the lower portion thereof. An opening 4d3 for extending the valve is formed.

  As described above, the side cabinet 4 is formed integrally with the bell mouth 4b and provided with the left and right side surfaces 4c and 4d so as to cover the outside of the left and right end plates of the outdoor heat exchanger 8. The entire side surface except the back surface (back surface) can be formed by bending a single metal plate. Compared to the assembly of separate side surface parts, the material yield and workability are improved as there is no joint. Also, the workability of mounting on the bottom plate is improved.

  Further, the side cabinet 4 is attached to the bottom plate 10 by fixing the front surface 4a and the left and right side surfaces 4d and 4e with screws at the bottom edge 4e of the side cabinet 4 and not fixing the back side with screws. This is because when the outdoor unit is installed, the back side is often installed close to the house, so even if the outdoor unit is installed close to the wall of the house, a screw fixing part is provided on the rear side. This is because it is easy to remove the integrated side cabinet 4 during service such as inspection and repair.

  In addition, the side cabinet 4 is manufactured by punching the air outlet 3 by press molding with a flat metal plate being flat, and by extending the bell mouth 4b to the periphery by drawing, and by connecting the electric wiring terminal mounting portion. 4d2, punching and bending of the opening 4d3 for extending the pipe connection valve, etc., and forming the plate into a flat state, moving it to the outdoor unit production line and stacking it, assembling and manufacturing the outdoor unit The left and right side surfaces 4c and 4d with respect to the front surface 4a are molded at an obtuse angle of 90 degrees or more on both the left and right sides. For this reason, the left and right side surfaces 4d and 4e are attached to the outdoor unit in a state where the left and right side surfaces 4d and 4e are slightly opened outward from the front surface 4a.

  For this reason, when the side cabinet 4 is assembled on the bottom plate 10 on which components such as the compressor 17, the outdoor heat exchanger 8, and the propeller fan 15 are mounted, the front of the left and right side portions 4c and 4d can be inserted openly, After loading the side cabinet 4 to the back, the left and right side portions 4c, 4d are pushed inward and joined to the bottom plate 10, and the front and side portions of the bottom plate 10 are screwed together. It can be assembled by fixing it.

  On the other hand, the machine room 13 includes component parts such as a compressor 17 installed on the front end side of the outdoor heat exchanger 8 and a capillary tube (not shown) as an expansion device, and a DC-driven fan motor 16 on the upper part thereof. An electric component box 18 that houses an electric control component for controlling the rotation speed of the compressor 17 and the like is accommodated.

  Reference numeral 3a in the figure is a blow grill attached to the front face of the opening of the blow outlet 3, and reference numeral 19 denotes a packed valve cover that covers the electric wiring terminal attachment 4d2 and the pipe connection valve opening 4d3 on the right side of the outdoor unit. Reference numeral 20 denotes a finger which is attached to the outer surface of the outdoor heat exchanger 8 and has a synthetic resin made of air holes in a lattice shape.

  In the outdoor unit 1 of the present air conditioner having the above-described structure, the outdoor heat exchanger 8 is formed in a flat shape so as to close the back opening 7, and the outdoor heat exchanger is not disposed on the side surface side. The width direction can be reduced, the cabinet can be miniaturized, and further processing such as bending is not required, so that productivity is improved and reliability is also improved.

  In addition, the outdoor heat exchanger has a flat shape and sucks outdoor air only at the back, so the ventilation resistance increases compared to that of the L-shaped heat exchanger, but depending on the operating conditions of the outdoor unit, a drive circuit using an IC By using a DC-driven motor that can finely control the speed of the fan motor, the outdoor heat exchanger can be controlled by controlling the air volume so that heat can be exchanged in an always efficient state.

  In addition, by using a DC-driven motor, the air volume is controlled so that the flat outdoor heat exchanger can always perform heat exchange in an optimum state without requiring adjustment of the throttle amount even in a capillary tube with a fixed throttle amount. As a result, it is possible to use an inexpensive capillary tube having no moving parts as compared with the expansion valve, and the reliability and manufacturing cost of the product can be greatly reduced.

  As described above, according to the outdoor unit of the air conditioner according to the present embodiment, the air flow rate of the fan can be reduced by using the flat outdoor heat exchanger only on the back surface and the DC-driven fan motor capable of changing the rotation speed. A small and highly reliable outdoor unit of an air conditioner that can be finely controlled and always maintain the heat exchange efficiency of the heat exchanger is realized.

The front side perspective view of the outdoor unit of the air conditioning apparatus which concerns on one Embodiment of this invention. The back side perspective view of the outdoor unit of the air harmony device concerning one embodiment of the present invention. The disassembled perspective view of the outdoor unit of the air conditioning apparatus which concerns on one Embodiment of this invention. The front side perspective view of the side cabinet used for the outdoor unit of the air conditioning apparatus which concerns on one Embodiment of this invention. The back side perspective view of the side cabinet used for the outdoor unit of the air harmony device concerning one embodiment of the present invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Outdoor unit of air conditioner, 2 ... Housing, 3 ... Air outlet, 4 ... Side cabinet, 4a ... Front side, 4b ... Bell mouth, 4c ... Left side part, 4c1 ... Left bent part, 4d ... Right side Surface part 4d1 ... right bent part, 5 ... upper opening, 6 ... top plate, 7 ... back opening, 8 ... outdoor heat exchanger, 9 ... lower opening, 10 ... bottom plate, 11 ... partition plate, 12 ... heat exchange chamber, 13 ... Machine room, 15 ... Propeller fan, 16 ... Fan motor, 17 ... Compressor, 18 ... Electrical component box.

Claims (1)

Side cabinet bent in a substantially U shape that forms the front and left and right side portions of the housing, a top plate that closes the top opening of the housing and forms the top surface, and a bottom plate that forms the bottom surface of the housing In the outdoor unit of the air conditioner in which the casing is formed with
The inside of the housing is divided into a heat exchanger chamber and a machine chamber on the bottom plate by a partition plate, and the outdoor heat in a planar shape that closes the entire rear opening of the housing on the back side of the heat exchange chamber. Installed an exchanger and installed a propeller fan and a DC-driven fan motor with variable rotation speed near the center of the front side of the outdoor heat exchanger. The machine room accommodates component parts such as a compressor and an expansion device. And an electrical component box containing an electrical control component for controlling the rotational speed of the fan motor and compressor at the upper part of the machine room,
The side cabinet has a structure in which an air outlet is opened on the front surface and a bell mouth is integrally formed around the air outlet, and both ends of the left and right side surfaces are bent to the back side to cover the outer sides of the left and right ends of the outdoor heat exchanger. And an outdoor unit for an air conditioner, wherein only the front surface and the left and right side surfaces are fixed to the bottom plate with screws.

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