JP2009068750A - Outdoor unit of air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outdoor unit of an air conditioner, efficiently cooling the interior of an electric component box and an inverter unit even when these units are disposed in a machine room of a lower stage. <P>SOLUTION: This outdoor unit of the air conditioner includes electric component boxes 14, 15, which are disposed in front of the machine room 60, and provided with openings at the front and the top, wherein a packing 29 is fitted to the front opening edge, and when front panels 4b2, 4b3 are closed, the front panels cover the front opening while pressing the packing 29. The front panels 4b2, 4b3 are provided with oblong opening parts 31, 38 located at positions corresponding to the front openings of the electric component boxes 14, 15, a pocket part 33 is formed at the back of the opening parts 31, 38, and the pocket part 33 is provided with a filter 35 for preventing entering of dust and/or water of the outside air entering from the opening parts 31, 38 and flowing to a blower 8 of the body casing 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an outdoor unit of an air conditioner equipped with a gas engine.

  DESCRIPTION OF RELATED ART Conventionally, the outdoor unit of the air conditioner which mounts a gas engine and a generator and can generate electric power at the time of an air-conditioning operation is known (for example, refer patent document 1). In addition, an outdoor unit of an air conditioner is also known in which the outdoor unit is divided into an upper stage and a lower stage, a heat exchanger that requires air flow is arranged in the upper stage, and components such as a gas engine are arranged in the lower stage ( For example, see Patent Document 2).

In such an outdoor unit, an electrical unit box in which electrical control components are stored and / or an inverter unit in which an inverter that converts generated power into AC / DC as appropriate is stored. Since the electrical box and / or the inverter unit (hereinafter referred to as a unit) contains electrical components such as a power IC that generate a large amount of heat, it is necessary to efficiently cool the inside of these units. For this reason, there is one in which these units are arranged in the upper stage of the main body casing, and the inside of the unit is cooled using the air flow caused by the flow of the blower.
Japanese Patent No. 3177339 Japanese Patent No. 3732991

Equipment such as a gas engine, a compressor, and a generator connected to these units are housed in the machine room at the lower stage of the main body casing as described above. It is preferable to install it in the machine room.
Also, considering the maintainability, in order to adjust both these units and the generator, etc., both the upper and lower stages of the front panel attached to the front surface of the main body casing so as to be opened and closed must be removed. Don't be. For this reason, it is preferable to install these units in the lower machine room and remove only the lower front panel so that maintenance can be performed.
However, when these units are arranged in the machine room, it is difficult to cool the inside efficiently.

  Therefore, an object of the present invention is to provide an outdoor unit of an air conditioner that can efficiently cool the inside of these units even when the electrical box and the inverter unit are arranged in the lower machine room. It is in.

In order to solve the above-described problems, the present invention includes a main body case having a front panel whose front surface is openable and closable, and a blower disposed on the upper surface, and a heat exchanger chamber at an upper stage of the main body case. In the outdoor unit of the air conditioner in which the machine room is provided in the lower stage and the gas engine and the compressor are housed in the machine room, the machine room is disposed on the front side of the machine room, and has openings in the front and upper parts, A packing is attached to the opening edge of the front portion, and when the front panel is closed, the front panel includes an electrical box that covers the front opening while pressing the packing, and the front panel includes the electrical box A horizontally long opening is provided at a position corresponding to the front opening of the first, a pocket is formed on the back side of the opening, and the outside dust that enters from the opening to the blower of the main body housing and enters the pocket. / Or water Characterized in that a filter for preventing entry.
According to this structure, the external air which enters from the opening part of a front panel can be flowed in the inside of an electrical equipment box by the aspect made to merge with the flow of the air ventilated to a heat exchanger with an air blower. Moreover, when taking in outdoor air, a filter can remove moisture from the outside air.

The upper end of the pocket portion may be positioned above the upper end of the opening, and the filter may be disposed above the upper end of the opening.
According to this configuration, it is possible to prevent moisture absorbed by the filter from entering the inside of the outdoor unit. In addition, the filter can be made invisible from the opening.

Furthermore, the opening may be formed across the width direction of the electrical box and disposed below the front opening of the electrical box.
According to this structure, the taken-in outside air can be flowed over the whole inside of an electrical equipment box.

Furthermore, the electrical box may be an inverter unit that houses an inverter.
According to this configuration, the interior of the inverter unit that is particularly affected by heat generation can be effectively cooled.

  The present invention is disposed on the front side of the machine room, has openings at the front and upper portions, and a packing is attached to the opening edge of the front, and the front panel is closed when the front panel is closed. The front panel is equipped with an electrical box that covers the front opening while pressing the packing, and the front panel is provided with a horizontally long opening at a position corresponding to the front opening of the electrical box, and a pocket is formed on the back side of the opening. In addition, since a filter is provided in the pocket portion to prevent intrusion of dust and / or water from the outside air that enters from the opening to the blower of the main body housing, the air blown to the heat exchanger by the blower is provided. The outside air entering from the opening of the front panel can be caused to flow into the electrical box in a manner of being joined to the flow, and the electrical box can be effectively cooled with a simple configuration. Thereby, even if it is a case where an electrical equipment box is arrange | positioned in a machine room, the inside of an electrical equipment box can be cooled efficiently. In addition, when taking outdoor air, moisture can be removed from the outside air by the filter, and water can be prevented from being applied to the components inside the electrical box. Therefore, the lifetime of the components in the electrical box is not shortened compared to the conventional case.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. The outdoor unit described in the present embodiment drives a compressor and a generator by a gas engine, converts electric power generated by the generator by an inverter, and supplies it to the outdoor unit and other equipment. It is used for a gas heat pump (GHP) type air conditioner.

FIG. 1 is a front view of an outdoor unit 1 according to an embodiment of the present invention. 2 is a front view showing a state where the front panel of FIG. 1 is removed, and FIG. 3 is a perspective view of FIG.
As shown in FIGS. 1 to 3, the outdoor unit 1 is formed in a substantially rectangular parallelepiped shape, and the main body housing 2 constituting the outer portion of the outdoor unit 1 has portions corresponding to the sides of the rectangular parallelepiped. It is formed of a frame 3 that constitutes and a panel portion 4 that constitutes six side surfaces.

  As shown in FIGS. 2 and 3, the frame 3 is provided with a horizontal frame 3 a extending in the horizontal direction at a substantially central position in the height direction of the outdoor unit 1. Further, a vertical frame 3b extending in the vertical direction is provided on the front surface of the outdoor unit 1 at a substantially central position in the width direction of the horizontal frame 3a. These frames 3, 3 a, 3 b have a function of increasing the rigidity of the outdoor unit 1 and a function as a support member for supporting the panel unit 4.

  As shown in FIGS. 2 and 3, the interior of the outdoor unit 1 is defined in two upper and lower stages by a partition plate 5 extending substantially horizontally. A heat exchange chamber 50 to which the heat exchanger 9 is attached is configured in the upper stage portion, and a machine chamber 60 in which a gas engine or the like described later is disposed is configured in the lower stage portion. The partition plate 5 partitions both chambers without any gap so that rainwater or the like entering the heat exchange chamber 50 from a blower 8 described later does not enter the machine chamber 60. In addition, this partition plate 5 is provided in the position which provided the horizontal frame 3a mentioned above in the height direction.

  Further, as shown in FIGS. 2 and 3, the partition plate 5 is provided with two vent holes 6 that connect the heat exchange chamber 50 and the machine chamber 60 with an interval in the width direction of the outdoor unit 1. Yes. The vent 6 allows the air inside the outdoor unit 1 to move freely between the two chambers. The vent 6 is provided with a roof portion 6a so that the above-described rainwater or the like does not enter the machine room 60 from the heat exchange chamber 50 side. That is, the air on the machine room 60 side moves to the heat exchange chamber 50 through the path of the arrow 7 shown in FIG.

  As shown in FIGS. 1 to 3, two blowers 8 are arranged side by side in the width direction on the upper panel 4 a that covers the upper side of the outdoor unit 1. The blower 8 takes air outside the outdoor unit 1 into the heat exchange chamber 50 from an air intake port (not shown) formed in a back panel (not shown) that covers the back surface of the heat exchange chamber 50. The air taken in is heat-exchanged by the heat exchanger 9 and then discharged upward of the outdoor unit 1. The blower 8 sucks the air on the machine room 60 side to the heat exchange chamber 50 side, and then discharges the air upward toward the outdoor unit 1 in the same manner.

  As shown in FIG. 1, the front panel of the outdoor unit 1 includes two panels: a lower left front panel 4 b 2 that covers the left side of the machine room 60, and a lower right front panel 4 b 3 that covers the right side of the machine room 60. Yes. These panels 4b2 and 4b3 are detachably attached (openable and closable) to the frame 3, the horizontal frame 3a, and the vertical frame 3b by screws or the like. When these panels 4b2 and 4b3 are attached, the outdoor unit 1 has a watertight structure in which rainwater or the like does not enter from the front side. Details of the front panel will be described later.

FIG. 4 is a cross-sectional view of the machine room 60 as viewed from above. In FIG. 4, the lower side is the front side.
Inside the machine room 60, mainly, the gas engine 11 located substantially in the center, the generator 12 located on the front right side of the gas engine 11, and the compressor 13 located on the front left side of the gas engine 11, The electrical unit 14 (electrical equipment box) located on the front side of the compressor 13 and on the left side of the vertical frame 3b, and the inverter unit 15 located on the front side of the generator 12 and on the right side of the vertical frame 3b. (Electrical box) is arranged. Electric power generated by the generator 12 is sent to the inverter unit 15 via a power cable (not shown). Therefore, the inverter unit 15 is disposed near the generator 12.

  The gas engine 11 is cooled by cooling water. The cooling water cooling water passage is provided with a cooling water pump 23 for circulating the cooling water and a radiator (not shown) for radiating the cooling water.

As shown in FIG. 4, the gas engine 11 has a drive shaft 11a protruding substantially horizontally from both ends. A drive pulley for winding transmission is attached to the left shaft end of the drive shaft 11a. A drive pulley is also attached to the driven shaft of the compressor 13 via a clutch mechanism (not shown), and a transmission belt 16 is wound around these drive pulleys. Thereby, the rotational power of the gas engine 11 is transmitted to the compressor 13 via the transmission belt 16, and the compressor 13 is driven. On the other hand, the generator 12 is connected to the right shaft end of the drive shaft 11a. As a result, the generator 12 can be driven by the gas engine 11 to generate power, and the compressor 13 can be driven by connecting the clutch when performing the air conditioning operation.
In FIG. 4, reference numeral 17 is an accumulator, 18 is an oil separator, 19 is an air cleaner, 20 is an intake box, 21 is a terminal block, 22 is an exhaust muffler, 23 is a cooling water pump, and 24 is an oil sub-tank.

FIG. 5 is a perspective view showing the inverter unit 15 as a single unit.
This inverter unit 15 is for AC / DC converting the electric power generated by the generator 12 and supplying it to each device (for example, a blower) inside the outdoor unit 1 and other equipment.

The inverter unit 15 includes an outer box 25 formed in a box shape whose front side is open, and a substrate 26 on which a power IC is mounted is disposed on the lower side of the outer box 25. A capacitor 27, a relay 28, and the like are disposed on the upper side of the substrate 26. In addition, on the upper surface of the outer box 25, three ventilation holes 25a for discharging air heated by a heating element such as a power IC are formed at intervals in the width direction.
The opening (front opening) on the front side of the inverter unit 15 is not closed as the outer box 25 alone, and the lower right front panel 4b3 of the outdoor unit 1 described above is attached to the outdoor unit 1. Are closed together by the lower right front panel 4b3. That is, the lower right front panel 4b3 is also used as a member that covers the front surface of the inverter unit 15 and the front surface of the outdoor unit 1.

  A packing 29 is attached to the edge of the front opening of the outer box 25 over the entire circumference of the edge. The packing 29 has elasticity, and for example, a sponge-like material or a rubber material is used. The packing 29 is pressed in the depth direction of the outdoor unit 1 by the lower right front panel 4b3 when the lower right front panel 4b3 is attached to the outdoor unit 1. When the packing 29 is pressed as described above, the air in the outer box 25 is kept airtight by the packing 29.

The position of the inverter unit 15 in the front-rear direction shown in FIG. 4 is such that the front end of the packing 29 is the front end of the outdoor unit 1 so that the packing 29 is pressed by the lower right front panel 4b3 as described above. It arrange | positions in the aspect which protrudes ahead rather than a part (specifically front side edge part of the flame | frame 3 to which the lower stage right side front panel 4b3 is attached).
The position of the inverter unit 15 in the width direction shown in FIGS. 2 to 4 is such that the ventilation hole 25a of the outer box 25 is located on the right vent hole 6 of the partition plate 5 when the inverter unit 15 attached is viewed from the front. Arranged to be located on the lower side. As a result, the air exiting from the ventilation hole 25a flows through the right vent 6 to the heat exchange chamber 50 efficiently.

  On the other hand, the electrical unit 14 has the same structure as the inverter unit 15. That is, the outer box 30 of the electrical unit 14 is formed in a box shape having an opening on the front side as shown in FIGS. 2 and 3, and the upper surface of the outer box 30 has air as shown in FIG. 4. Three ventilation holes 30a are formed at intervals in the width direction. In addition, a packing 29 is attached to the front opening edge similarly to the inverter unit 15, and when the lower left front panel 4 b 2 is attached to the outdoor unit 1, the depth of the outdoor unit 1 is reduced by the lower left front panel 4 b 2. It is pressed in the direction. When the packing 29 is pressed in this way, the air in the outer box 30 is kept airtight by the packing 29.

The position of the electrical unit 14 in the front-rear direction shown in FIG. 4 is such that the front end of the packing 29 is the front end (details) of the outdoor unit 1 so that the packing 29 is pressed by the lower left front panel 4b2. Are arranged in such a manner that they protrude forward from the front end of the frame 3 to which the lower left front panel 4b2 is attached.
The position of the electrical unit 14 in the width direction shown in FIGS. 2 to 4 is such that the ventilation hole 30a of the outer box 30 is located on the left vent hole 6 of the partition plate 5 when the electrical unit 14 attached is viewed from the front. Arranged to be on the lower side. As a result, the air exiting from the ventilation hole 30a efficiently flows to the heat exchange chamber 50 through the left vent 6.

FIG. 6A is a front view showing the lower right front panel 4b3 alone, and FIG. 6B is a rear view thereof. FIG. 7 is a sectional view taken along line VII-VII in FIG.
As shown in FIG. 6A, the lower left front panel 4b3 is formed with an air intake hole 31 (opening) formed in a horizontally long shape. The air intake hole 31 is formed at a position corresponding to the front opening of the inverter unit 15 in a state where the lower left front panel 4 b 3 is attached to the outdoor unit 1. More specifically, the air intake hole 31 is formed to have a length substantially equal to the length in the width direction of the front opening of the inverter unit 15, and the outdoor air taken in from the air intake hole 31 is transferred to the inverter unit 15. It is formed so as to be sent over the entire region in the width direction. The air intake hole 31 is formed at a position below the front opening of the inverter unit 15, and the taken outdoor air is sent over the entire area in the height direction of the inverter unit 15. It is arranged to be washed away.

  As shown in FIG. 6B and FIG. 7, an air guide plate 32 is provided on the back side of the lower right front panel 4 b 3 (the side facing the inner side of the inverter unit 15) and in the air intake hole 31. It has been. The air guide plate 32 covers the air intake hole 31 from the back side, forms an opening 37 above the air intake hole 31, and guides the outdoor air 34 taken in from the air intake hole 31 to the opening 37. Then, the air is sent upward from the opening 37 (see the arrow of the outdoor air 34 shown in FIG. 7). That is, by providing the air guide plate 32, the back side surface of the lower right front panel 4b3 and the air guide plate 32 form a pocket portion 33 that is open on the upper side. Opening 37 is formed.

The opening 37 which is the upper end of the pocket portion 33 is located above the upper end 31 a of the air intake hole 31 so that rainwater entering from the air intake hole 31 does not enter the inside of the inverter unit 15 from the opening 37. It has become.
Further, as shown in FIG. 7, the pocket portion 33 is provided with a sponge 35 (filter) for absorbing moisture contained in the outdoor air. The sponge 35 is disposed above the upper end 31 a of the air intake hole 31 so that the sponge 35 cannot be seen from the air intake hole 31. The lower portion of the sponge 35 is supported by a support portion 36 formed on the air guide plate 32 so that the sponge 35 contains moisture and does not fall by its own weight.

  On the other hand, the lower left front panel 4b2 covering the front surface of the electrical unit 14 is also formed with an air intake hole 38 at a position corresponding to the front opening of the electrical unit 14, and a pocket portion is formed on the back side of the panel 4b2. Since these configurations and operations are the same as those of the lower right front panel 4b3, detailed description thereof is omitted.

According to the outdoor unit 1 of the air conditioner according to the embodiment of the present invention, the air intake hole 38 is formed in the lower right front panel 4b3, and the outdoor air taken in from the air intake hole 38 is converted into the inverter unit 15 and / or The electric unit 14 (hereinafter, referred to as the electric box 14, 15) can be sent to the inside, and the inside of the electric box 14, 15 can be efficiently cooled.
Further, the air intake holes 31 and 38 are formed across the width direction of the electrical boxes 14 and 15, and disposed at positions corresponding to the lower side of the front openings of the electrical boxes 14 and 15, The entire interior of 15 can be efficiently cooled.

  In addition, ventilation holes 25a and 30a are provided on the upper surfaces of the electrical boxes 14 and 15, and the ventilation holes 6 of the partition plate 5 are provided above the ventilation holes 25a and 30a. Since the air flowing out from the ventilation holes 25 a and 30 a can be sent to the heat exchange chamber 50 through the vent 6, the air from the ventilation holes 25 a and 30 a does not stay in the machine room 60. Therefore, the insides of the electrical boxes 14 and 15 can be efficiently cooled.

  Further, since the pocket portion 33 is provided in the air intake holes 31 and 38 and the sponge 35 is provided in the pocket portion 33, the moisture of outdoor air entering from the air intake holes 31 and 38 can be absorbed by the sponge 35. It is possible to prevent moisture such as dust and rainwater from entering the boxes 14 and 15. As a result, it is possible to prevent each component in the electrical boxes 14 and 15 from having a short life due to the influence of water.

  Furthermore, since the electrical equipment boxes 14 and 15 are arranged on the front side of the machine room 60, the electrical equipment boxes 14 and 15 and the generator 12 and the gas engine 11 connected to the electrical equipment boxes 14 and 15 are simply removed from the lower right front panel 4b3. Can be maintained together. Therefore, maintenance work can be easily performed.

  When the packing 29 is attached to the front opening edge of the electrical box 14, 15 and the lower right front panel 4 b 3 is closed, the lower right front panel 4 b 3 presses the packing 29 while the lower right front panel 4 b 3 is pressed. Since the openings are covered, the panel that closes the front openings of the electrical boxes 14 and 15 can be shared by the lower left front panel 4b2 and / or the lower right front panel 4b3 that closes the front side of the outdoor unit 1. As a result, the inside of the electrical boxes 14 and 15 can be maintained as it is simply by removing the lower right front panel 4b3 and the like, so that the maintenance work is facilitated. Further, the manufacturing cost can be reduced by the amount not provided with the panel for closing the front openings of the electrical boxes 14 and 15.

The best mode for carrying out the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and various modifications and changes can be made based on the technical idea of the present invention. .
In the present embodiment, the structure for cooling the interior of the electrical unit 14 and the inverter unit 15 has been described as an example. However, the electrical unit 14 may be a unit that stores other electrical components, and may be an electrical box that stores heating components therein. For example, by using the structure described in this embodiment, the inside can be efficiently cooled.

  Moreover, although the sponge 35 is provided in the pocket part 33, if it can absorb a water | moisture content, it may be a filter using things other than the sponge 35, for example, a water absorbing polymer.

It is a front view of the outdoor unit which concerns on embodiment of this invention. It is a front view which shows the state which removed the front panel of FIG. It is the perspective view which looked at FIG. 2 from the front diagonal right side. It is sectional drawing in the IV-IV line of FIG. It is a perspective view which shows an inverter unit alone. (A) is a front view showing the lower right front panel alone, and (b) is a rear view of (a). It is sectional drawing in the VII-VII line of Fig.6 (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 Main body housing 3 Frame 3a Horizontal frame 3b Vertical frame 4 Panel part 4a Top panel 4b2 Lower left front panel 4b3 Lower right front panel 5 Partition plate 6 Vent 6a Roof 7 Air flow 8 Blower 9 Heat exchanger 11 Gas Engine 11a Drive Shaft 12 Generator 13 Compressor 14 Electrical Unit (Electrical Box)
15 Inverter unit (electrical equipment box)
16 Transmission belt 23 Cooling water pump 25 Outer box 25a Ventilation hole (opening)
26 Substrate 27 Condenser 28 Relay 29 Packing 30 Outer box 30a Ventilation hole (opening)
31 Air intake hole 32 Air guide plate 33 Pocket part 34 Outdoor air 35 Sponge (filter)
36 Supporting part 37 Opening part 38 Air intake hole 50 Heat exchange room 60 Machine room

Claims (4)

A front panel is configured with a front panel that can be opened and closed, and a main body housing having a blower disposed on an upper surface thereof. A heat exchanger chamber is provided in an upper stage of the main body casing, and a machine room is provided in a lower stage. In an outdoor unit of an air conditioner in which a gas engine and a compressor are housed,
It is arranged on the front side of the machine room, has openings at the front and top, and a packing is attached to the opening edge of the front, and when the front panel is closed, the front panel presses the packing. While equipped with an electrical box that covers the front opening,
The front panel is provided with a horizontally long opening at a position corresponding to the front opening of the electrical box, and a pocket is formed on the back side of the opening. The main body housing enters the pocket from the opening. An outdoor unit of an air conditioner, comprising a filter for preventing intrusion of dust and / or water of outside air flowing to a body blower.   2. The outdoor unit of an air conditioner according to claim 1, wherein an upper end of the pocket portion is positioned above an upper end of the opening, and the filter is disposed above an upper end of the opening.   The outdoor part of the air conditioner according to claim 1 or 2, wherein the opening is formed over the width direction of the electrical box and is disposed below the front opening of the electrical box. unit.   The outdoor unit of an air conditioner according to any one of claims 1 to 3, wherein the electrical box is an inverter unit that houses an inverter.

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