JP4797633B2 - Air conditioner outdoor unit - Google Patents

Description

  The present invention relates to an outdoor unit of an air conditioner, and more particularly to a reactor mounting structure provided in an inverter circuit.

  For example, as shown in FIG. 8A, a conventional outdoor unit of an air conditioner divides an interior of an outdoor unit 50 into left and right by a partition plate 52 erected on a base 51, and heats one of the divided units. An exchange chamber 53 is provided, and a compressor chamber 54 is provided on the other compartment. The heat exchange chamber 53 is provided with a heat exchanger facing the suction port formed on the back plate and a blower fan 56 facing the air outlet formed on the front panel.

  The compressor chamber 54 is provided with a compressor 55 and an accumulator for compressing the refrigerant, and a control board for controlling the compressor 55 and the blower fan 56 and the like is provided above the compressor chamber 54. An electrical module 57 is provided.

  On one side of the electrical module 57 facing the heat exchange chamber 53, as shown in FIG. 8 (B), a cover 59 having an open upper surface and a rear surface and a substantially triangular side section is provided. A reactor 58 is attached to the heat exchange chamber 53 so as to protrude, and a reactor 58 for preventing a reduction in power factor of the inverter circuit incorporated in the electrical module 57 is fixed to the inclined surface on the front side of the cover 59. It has become so. Even if rainwater enters the base 51 or the lower part of the outdoor unit 50 is submerged by mounting the reactor 58 on one side of the electrical module 57 and positioning it in the upper part of the outdoor unit 50, The reactor 58 is protected from these.

  However, since the reactor 58 and the electrical module 57 are not partitioned, the heat generated from the reactor 58 may be transmitted to the control board and adversely affect the control board. There is a problem that the electric component 57 propagates to the electric module 57 through the cover 59 and causes trouble in the built-in electronic component. In addition, if the electrical module 57 is to be removed from the outdoor unit 50 during maintenance work, the relatively heavy reactor 58 is also removed, which affects workability. It was.

JP 2003-120963 A (page 4, FIG. 2)

  In view of the above problems, the present invention improves safety by preventing heat and vibration generated from the reactor from being propagated as much as possible to the electrical module and the control board or electronic component incorporated in the electrical module. It is an object of the present invention to provide an outdoor unit for an air conditioner that can easily perform maintenance work of an electrical module.

  In order to solve the above problems, the present invention divides the main body into a heat exchange chamber and a compressor chamber by a partition plate, and provides an electrical module above the compressor chamber, and is connected to the electrical module by a lead wire. In the outdoor unit of an air conditioner provided with the reactor, the reactor is attached to the upper part of the partition plate.

  Further, the reactor is configured to be fixed to the partition plate via a mounting bracket.

  Further, the mounting bracket is configured such that the compressor chamber side is open.

  Moreover, the case which comprises the said electrical module has the structure which has partitioned off the said reactor and the control board arrange | positioned at the said electrical module.

  In addition, the electrical module is mounted on the main body after the reactor is fixed to the upper part of the partition plate.

  The wiring connecting the electrical module and the reactor is routed to the back side of the electrical module.

  In addition, a small window for maintenance having a terminal board mounting portion is provided on the side surface of the main body, and the small window and the reactor are provided at substantially the same position at the side surface position of the main body. ing.

  According to the present invention, a reactor that generates heat and vibration is fixed to a mounting bracket including a frame, a top plate, an inclined fixing plate, and a side plate, and the inside of the outdoor unit main body is divided into left and right. By attaching to the partition plate, the vibration generated from the reactor is prevented from propagating to the electrical module as much as possible, and the power supply built in the electrical module, the control board, and the electrical components do not cause trouble due to the vibration propagation. ing.

  In addition, the mounting bracket is configured so that heat from the reactor is smoothly radiated by opening the compressor chamber side.

  Further, the case constituting the electrical module is configured to partition the heat exchange chamber side and the electrical module side, thereby preventing the heat generated from the reactor from affecting the control board. Yes.

  Further, the electrical module is provided detachably by itself, so that maintenance work can be easily performed.

  Also, the right side panel is provided with a small window for maintenance provided with a terminal board mounting portion, and the small window and the reactor are provided so as to be substantially at the same position in the front-rear position. When the terminal board attached to the terminal board attaching portion is removed, the maintenance work of the reactor can be performed from the small window.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail as examples based on the attached drawings.

  FIG. 1 is an external perspective view showing an outdoor unit of an air conditioner, and FIG. 2 is a sectional view thereof. FIG. 3 is a main part perspective view showing attachment of the reactor, and FIG. 4 is a main part perspective view showing attachment of the electrical module. FIG. 5 is a perspective view showing a state in which the reactor is attached.

  As shown in the external perspective view of FIG. 1, the outdoor unit of the air conditioner includes a pair of legs 1a on the lower surface, and forms a blowout port 8 with a base 1 formed in a flat plate shape and a number of crosspieces. A front panel 2 attached to the front side of the base 1, a suction port 7, a rear panel 3 attached to the back side, and a right side panel 5 provided with a storage box 9 containing piping and wiring. And the left side panel 6 which makes a pair with this, and the top plate 4 constitute a main body.

  The base 1, the front panel 2, the rear panel 3, the right side panel 5, and the left side panel 6 are made of press-formed steel plates such as stainless steel, and the surface of each panel is subjected to a coating treatment such as rust prevention. ing. Further, a flange that is bent upward and has a plurality of screw holes is formed on the four peripheral edges of the base 1 that is formed in a rectangular shape, and the front panel 2 and other parts are formed by the flange. A panel can be installed. On the upper surface of the base 1, a mounting bush for fixing a compressor, a heat exchanger, etc., which will be described later, is formed.

  As shown in the cross-sectional view of FIG. 2, the interior of the outdoor unit is divided into left and right by a partition plate 10 erected on the base 1, and one of the compartments is divided into a heat exchange chamber 11. Is a compressor chamber 12. The heat exchange chamber 11 has a large number of fins arranged in parallel so as to face the suction port 7 formed in the rear panel 3, and a heat transfer tube arranged in a meandering manner so as to be orthogonal to the fins. An unillustrated outdoor heat exchanger 20 is provided, and a blower fan 15 driven by a fan motor 16 is provided opposite to the air outlet 8 formed in the front panel 2.

  A motor mount 14 for supporting the fan motor 16 is erected on the base 1. The motor mount 14 has a lower end fixed to the mounting bush of the base 1, a main frame erected substantially vertically toward the top plate 4, and a horizontal shape from the upper end of the main frame toward the front panel 2. The side cross section is formed in an inverted L shape. The main frame is formed of a metal frame formed in a ladder shape, and a motor mounter portion to which the fan motor 16 is fixed is formed at the center, and the fan motor 16 is screwed to the motor mounter portion. It has become so.

  The compressor chamber 12 includes a compressor 17 that compresses the refrigerant and sends it to the outdoor heat exchanger 20 or an indoor heat exchanger provided in the indoor unit, an accumulator that temporarily stores the refrigerant that has recirculated, and the like. An electrical module 13 that controls the compressor 17 and the fan motor 16 is provided above the electrical module 13. The electrical module 13 forms a rectangular casing by bending a metal plate such as stainless steel, and stores power supplies, a plurality of control boards, electrical components, and the like inside the casing.

  The refrigerant compressed by the compressor 17 is sent to the outdoor heat exchanger 20 or the indoor heat exchanger, and is condensed or evaporated in these to become heat-vaporized refrigerant that passes through the accumulator. It returns to the compressor 17. Further, during the cooling operation, outdoor air sucked from the suction port 7 of the rear panel 3 absorbs heat released from the outdoor heat exchanger 20 through which the refrigerant circulates, and is driven by the fan motor 16. The blower fan 15 discharges the air from the air outlet 8 of the front panel 2 to the outside.

  The electrical module 13 includes a converter circuit that converts AC power from a commercial power source into DC power, and the DC power supplied from the converter circuit is converted into AC power of an arbitrary frequency and an arbitrary voltage and compressed. An inverter circuit for controlling the rotational speed of the machine 17 and the like is incorporated. The converter circuit is composed of a rectifier circuit composed of a diode bridge that rectifies an alternating current into a direct current, and a capacitor smoothing circuit that smoothes the current whose rectified waveform fluctuates in a mountain shape with a capacitor or the like. However, the power factor of the motor that drives the compressor 17 is reduced, and harmonics are generated.

  In order to prevent a reduction in power factor, a reactor 18 including a laminated iron core and a winding wound around the core is provided in the outdoor unit, and the so-called conduction angle of the current value is expanded by the reactor 18, so The power factor is improved by lowering the peak value of the current flowing through the. However, since a current containing harmonic components flows through the reactor 18, vibration and heat are generated from the reactor 18.

  As shown in FIG. 3, the reactor 18 is attached to the partition plate 10 via a mounting bracket 19. The partition plate 10 has a rectangular shape in which a front edge portion and a rear edge portion are bent toward the electrical module 13 to form a front edge flange 10b and a rear edge flange 10a, respectively, and a flange is extended to the periphery. The mounting hole 10c is drilled upward. The mounting bracket 19 includes a rectangular frame 19a formed to fit the diameter of the mounting hole 10c, an upper surface plate 19c protruding from the upper portion of the frame 19a, and a tip portion of the upper surface plate 19c. And an inclined fixed plate 19b that connects the lower portion of the frame body 19a, and a side plate that covers the upper surface plate 19c and the side surface of the fixed plate 19b.

  The reactor 18 includes a rectangular main body 18a having a built-in laminated iron core, and leg portions 18b provided on both side surfaces of the main body 18a and having screw insertion holes at both ends, respectively. A screw hole corresponding to the screw insertion hole is formed in the plate 19b. The mounting bracket 19 is formed by inserting the top plate 19c, the fixing plate 19b, and the side plate into the mounting hole 10c of the partition plate 10, and spot welding the frame body 19a to the peripheral portion of the mounting hole 10c. The partition plate 10 is fixed.

  When the partition plate 10 to which the mounting bracket 19 is fixed is fixed to the base 1 together with the outdoor heat exchanger 20 and the like, the reactor 18 is placed on the fixing plate 19b of the mounting bracket 19, and then The screw is inserted into the screw insertion hole of the leg portion 18b, and the screw is screwed into the screw hole of the fixing plate 19b, thereby being firmly fixed to the partition plate 10.

  When the reactor 18 is fixed, as shown in FIG. 4, the electrical module 13 is subsequently attached inside the outdoor unit. First, a pair of lead wires 23 led out from the control board 21 of the electrical module 13 are connected to the reactor 18, and in this state, the electrical module 13 is fixed by screwing.

  The mounting bracket 19 is open on one side of the compressor chamber 12 so that heat is smoothly radiated from the reactor 18, while the case 22 constituting the electrical module 13 is as shown in FIG. In addition, a partition plate 22a is formed on the heat exchange chamber 13 side, so that the influence of heat generated from the reactor 18 on the control board 21 can be prevented. If the distance between the control board 21 and the reactor 18 can be kept sufficiently, the partition plate 22a may not be provided.

  Further, as shown in FIG. 4, an insertion hole 22b through which a lead wire 23 connecting the electrical module 13 and the reactor 18 is inserted is provided on the back side of the case 22 constituting the electrical module 13, and the lead Since the wire 23 is routed to the back side, for example, when the maintenance operation is performed with the front panel 2 removed, the electrical module 13 can be pulled out to the front side. Work can be done easily. Further, as shown in FIG. 6, the right side panel 5 is provided with a small window 5a for maintenance provided with a terminal board mounting portion 24. The small window 5a and the reactor 18 are composed of a main body. The side surfaces are provided so as to be substantially the same position. Accordingly, when the terminal board attached to the terminal board attaching portion 24 is removed, the maintenance work of the reactor 18 can be performed from the small window 5a.

  Further, as shown in FIG. 7, a locking projection 25 is provided on the upper surface of the fixing plate 19b of the mounting bracket 19 to lock the end of the leg 18b provided in the reactor 18, The work can be easily performed during the installation work or the maintenance work.

  As described above, by fixing the reactor 18 to the partition plate 10 via the mounting bracket 19, the propagation of the vibration generated from the reactor 18 to the electrical module 13 is prevented as much as possible, and the built-in power supply In such a manner, troubles due to vibrations are prevented from occurring in the control board, the electrical component, and the like. Further, the housing of the electrical module 13 partitions the reactor 18 and the built-in control board and the like, so that the influence of heat generated from the reactor 18 can be prevented. Further, during the maintenance work, the electrical module 13 can be removed alone and workability can be improved.

It is an external appearance perspective view which shows the outdoor unit of an air conditioner. It is sectional drawing of the outdoor unit of the air conditioner by this invention. It is a principal part perspective view which shows attachment of a reactor. It is a principal part perspective view which shows attachment of an electrical equipment module. It is a perspective view which shows the case of a reactor and an electrical equipment module. It is a side view which shows the right side surface of an outdoor unit. It is a perspective view which shows the state in which the reactor was attached. (A) is sectional drawing which shows the outdoor unit of the conventional air conditioner. (B) is a perspective view showing attachment of a conventional reactor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 1a Leg part 2 Front panel 3 Rear panel 4 Top plate 5 Right side panel 5a Small window 6 Left side panel 7 Suction port 8 Air outlet 9 Storage box 10 Partition plate 10a Rear edge flange 10b Front edge flange 10
10c Mounting hole 11 Heat exchange chamber 12 Compressor chamber 13 Electrical module 14 Motor mounting base 15 Blower fan 16 Fan motor 17 Compressor 18 Reactor 18a Body 18b Leg 19 Mounting bracket 19a Frame 19b Fixed plate 19c Top plate 20 Outdoor heat exchange Device 21 Control board 22 Case 22a Partition plate 22b Insertion hole 23 Lead wire 24 Terminal board mounting part 25 Locking protrusion

Claims (1)

The main body is partitioned into a heat exchange chamber and a compressor chamber by a partition plate, and a fan is provided in the heat exchange chamber. An electrical module is provided above the compressor chamber, and connected to the electrical module by a lead wire. In the outdoor unit of an air conditioner provided with a reactor,
The reactor is attached to the upper part of the partition plate via a mounting bracket that bulges into the heat exchange chamber and is open on the compressor chamber side, and is disposed so as to overlap the projection surface from above the blower. ,
The outdoor unit of an air conditioner , wherein the electrical module is provided on an open side of the mounting bracket .

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