JP4119176B2 - Package type compressor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a package type compressor in which a compressor body, a motor and the like are housed in a soundproof box.
[0002]
[Prior art]
In general, a package type compressor includes a bottom plate, a left side plate, a right side plate, a rear plate, a top plate and a soundproof box formed into a box shape by a front door that can be opened and closed, and a motor provided in the soundproof box. The main body of the compressor is constituted by a main body and a tank provided in the soundproof box and storing the compressed fluid discharged from the main body of the compressor.
[0003]
Moreover, some recent package compressors are equipped with an inverter device that can easily control the motor, and this inverter device is mounted in a soundproof box while being housed in an inverter housing box. Yes.
[0004]
[Problems to be solved by the invention]
By the way, in the package type compressor by the prior art mentioned above, the inverter storage box which incorporated the inverter apparatus in the soundproof box is arrange | positioned. However, since the inverter device is composed of electrical components such as switching elements, heat is generated during operation. For this reason, when the inverter device (inverter housing box) is housed in a soundproof box where heat is easily trapped, the inverter device cannot be cooled sufficiently, and the temperature of the inverter device exceeds the set reference value. There is a problem of rising. In this case, when the temperature of the inverter device rises, the temperature of the capacitor in the inverter device rises, and the characteristics of the capacitor greatly change due to temperature change (for example, every time the ambient temperature rises by 10 ° C.) Life is halved).
[0005]
The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a package type compressor that can efficiently cool an inverter device even when the inverter device is housed in a soundproof box. There is to do.
[0006]
[Means for Solving the Problems]
A package type compressor according to the present invention includes a soundproof box formed in a box shape, a compressor body provided in the soundproof box and driven by a motor, and an inverter device provided in the soundproof box and driving the motor. And an inverter storage box with built-in.
[0007]
Then, in order to solve the above problems, characteristic of the structure of the invention of claim 1 is employed, inside the soundproof box, provided with a duct that forms a cooling air passage surrounding the inverter housing box, the The soundproof box is provided with an inlet through which cooling air flows into the duct from the outside and an outlet through which the cooling air flowing through the duct flows out, and the soundproof box includes the inlet and the outlet. A configuration is provided in which at least one of them is provided with a blower fan that guides the cooling air into the duct separately from the cooling air that cools the compressor body .
[0008]
With this configuration, when the package type compressor is operated, the blower fan is driven, and this blower fan flows cold air outside the soundproof box separately from the cooling air that cools the compressor body and the like. Forced into the duct from the inlet. And a duct can cool the inverter storage box (inverter apparatus) enclosed by this duct efficiently by distribute | circulating the cold cooling air which flows in from an inflow port in a cooling air path toward an outflow port. . Further, the cooling air heated by cooling the inverter device can be discharged to the outside from the outlet.
[0009]
In the invention of claim 2, said duct, for cooling air flowing in from the inlet leads to flow outlet through the inverter housing box, the guide plate for shielding between the inlet and outlet the provision of construction and the Ru Tei.
[0010]
With this configuration, the guide plate blocks between the inlet and the outlet . Therefore, when cooling air flows into the duct, the guide plate flows through the inverter housing box to the outlet. To guide . Therefore, it is possible to prevent the cooling air tinged heat inverter device is cooled is circulated, it is possible to supply the cooling air cooled to inverter device at all times.
[0011]
According to the invention of claim 3, the duct is provided on one surface constituting the soundproof box, and the inflow port and the outflow port are provided on the same surface as the one surface . Thereby, the other surfaces of the soundproof box other than the surfaces provided with the inlet and the outlet can be arranged close to the wall or the like.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a package type compressor according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
[0013]
1 to 5 show a first embodiment of the present invention. Reference numeral 1 denotes a soundproof box constituting the outer surface of the package compressor, and the soundproof box 1 includes a bottom plate 2 formed in a rectangular shape elongated in the left and right directions, as shown in FIGS. A left side plate 3 erected upward from the left edge of the bottom plate 2, a right side plate 4 erected on the right edge of the bottom plate 2 so as to face the left side plate 3, and the bottom plate 2 A rear plate 5 erected at the rear edge of the rear plate, the left and right side plates 3 and 4, a top plate 6 covering the upper side of the rear plate 5, the bottom plate 2, the left and right side plates 3 4 and the front door 7 provided so as to cover the front side opening surrounded by the rear plate 5, it is configured as a substantially rectangular parallelepiped box.
[0014]
Here, the front door 7 includes a left door 7A attached to the left side plate 3 so as to be openable and closable, and a right door 7B attached to the right side plate 4 so as to be openable and closable. An operation panel 8 including a switch, a display device and the like is provided on the upper part. The right side plate 4 is provided with an inlet 23 and an outlet 24, which will be described later, spaced apart in the upward and downward directions.
[0015]
Reference numeral 9 denotes a fixing base which is located in the soundproof box 1 and is provided on the bottom plate 2. The fixing base 9 is arranged via a lower frame 9A and a plurality of vertical frames 9B above the lower frame 9A. The upper frame 9C is provided.
[0016]
Reference numeral 10 denotes a compressor main body positioned in the soundproof box 1 and installed on the upper frame 9C of the fixed base 9. The compressor main body 10 is a three-cylinder reciprocating motion having three cylinders 10A, 10B, and 10C. It is configured as a compressor. And the compressor main body 10 compresses air in each cylinder 10A, 10B, 10C by driving the pulley 10D connected to the crankshaft (not shown) with the motor 11 mentioned later, The compressed air is compressed. It feeds into the air tank 13 to be described later.
[0017]
A motor 11 is mounted on the lower frame 9A of the fixed base 9. A pulley 11A is provided on the output shaft of the motor 11, and a belt 12 is interposed between the pulley 11A and the pulley 10D of the compressor body 10. It is being handed over. The motor 11 is driven to rotate the output shaft by being fed from an inverter device 15 to be described later, and drives the compressor body 10 via the pulleys 11A and 10D and the belt 12.
[0018]
Reference numeral 13 denotes an air tank positioned on the left side of the motor 11 and mounted on the lower frame 9A of the fixed base 9. The air tank 13 stores compressed air discharged from the compressor body 10, and both ends thereof are It is formed as a closed cylindrical sealed container. The air tank 13 is provided with a compressed air outlet 13 </ b> A and a drain port 13 </ b> B protruding from the left side plate 3 of the soundproof box 1 to the outside.
[0019]
14 is an inverter housing box provided in a duct 16 to be described later. The inverter housing box 14 includes a lower plate 14A, an upper plate 14B, a front plate 14C, a rear plate 14D, and a left side plate as shown in FIGS. 14E and the right side plate 14F are formed as a rectangular parallelepiped box. The inverter housing box 14 is formed with vent holes 14G, 14H, and 14J in the lower plate 14A, the left side plate 14E, and the right side plate 14F, respectively. Further, for example, two blower fans 14K are attached to the upper plate 14B, and each of the blower fans 14K is configured as an exhaust fan that blows air in the direction in which the air in the inverter housing box 14 is discharged.
[0020]
Reference numeral 15 denotes an inverter device built in the inverter housing box 14. The inverter device 15 can easily control (drive) the motor 11 by converting a DC voltage into an AC voltage. The inverter device 15 is configured by a large number of electrical components including a high-voltage side transistor element, a low-voltage side transistor element, and a capacitor that absorbs a surge voltage.
[0021]
Reference numeral 16 denotes a duct that surrounds the inverter device 15 and is provided in the soundproof box 1. The duct 16 is positioned on the front side in the upper and lower middle portions of the soundproof box 1 and is attached to the right side plate 4. Yes. As shown in FIG. 5, the duct 16 is roughly constituted by a duct body 17, a lid 19 and guide plates 20 and 21, which will be described later, and forms a cooling air passage 22 which will be described later, as shown in FIGS. is doing.
[0022]
Reference numeral 17 denotes a duct main body constituting the main body portion of the duct 16. The duct main body 17 includes a rectangular rear surface portion 17A elongated in the upward and downward directions, and a left side surface portion extending forward from the left edge of the rear surface portion 17A. 17B, an upper surface portion 17C extending from the upper end edge of the rear surface portion 17A to the front side, and a lower surface portion 17D extending from the lower end edge of the rear surface portion 17A to the front side are roughly configured as a box-like body that opens to the front side and the right side. ing.
[0023]
Further, attachment surface portions 17E and 17E for attaching a lid body 19 to be described later are provided at the front end portions of the upper surface portion 17C and the lower surface portion 17D. Further, the upper surface portion 17C and the lower surface portion 17D are provided with mounting brackets 17F and 17F by bending the right end portion. The duct body 17 is fixed to the right side plate 4 by a plurality of bolts and nuts 18 with each mounting bracket 17F being brought into contact with the right side plate 4 of the soundproof box 1.
[0024]
19 is a lid that is detachably attached so as to cover the front side of the duct body 17 (see FIGS. 2 and 5). The lid 19 is a rectangular plate that extends upward and downward, The upper and lower end portions are screwed to the mounting surface portion 17E.
[0025]
Reference numeral 20 denotes a left guide plate disposed on the upper left side in the duct 16, and the guide plate 20 is made of, for example, a rectangular plate, and is located above the vent hole 14 </ b> H and is placed in the inverter housing box. 14 and the left side surface portion 17 </ b> B of the duct body 17.
[0026]
Reference numeral 21 denotes a right guide plate disposed on the upper right side in the duct 16, and the guide plate 21 is formed of, for example, a rectangular plate and is located above the vent hole 14 </ b> J. It is provided between the storage box 14 and the right side plate 4 of the soundproof box 1.
[0027]
The guide plates 20 and 21 guide the cooling air flowing from the inverter housing box 14 when the cooling air flowing from the inlet 23 described later flows toward the outlet 24 described later. It is. Thus, the guide plates 20 and 21 can cool the inverter device 15 and prevent the heated cooling air from circulating, and can always supply the cooled cooling air to the inverter device 15.
[0028]
Reference numeral 22 denotes a cooling air passage formed in the duct 16, and the cooling air passage 22 is formed upward from the inflow port 23 toward the outflow port 24. Specifically, the cooling air passage 22 flows from the inflow port 23 by blocking between the inverter housing box 14 and the left side surface portion 17B of the duct body 17 and the right side surface plate 4 of the soundproof box 1 by the guide plates 20 and 21. The cooling air thus formed is circulated through the inverter housing box 14 toward the outlet 24.
[0029]
Reference numeral 23 denotes an inlet provided on the right side plate 4 of the soundproof box 1 (see FIG. 1). The inlet 23 corresponds to a lower portion of the duct 16, that is, the lower surface of the duct body 17, as shown in FIG. An opening is formed near the upper side of the portion 17D. And the inflow port 23 flows in the outside air toward the inside of the duct 16 as cooling air, when the below-mentioned ventilation fan 25 drives.
[0030]
On the other hand, 24 is an outlet (see FIG. 1) provided on the right side plate 4 of the soundproof box 1, and the outlet 24 corresponds to a portion corresponding to the upper part of the duct 16, that is, the duct body 17 as shown in FIG. An opening is formed at a position near the lower side of the upper surface portion 17C. And the outflow port 24 flows out the cooling air in the duct 16 outside when the ventilation fan 25 drives.
[0031]
Here, the inflow port 23 and the outflow port 24 are respectively provided on the right side plate 4 of the soundproof box 1. The outlet 24 is larger than the opening area of the inlet 23, and is formed with a large opening area that is, for example, 1.5 times or more.
[0032]
Reference numeral 25 denotes a blower fan provided in the duct 16 corresponding to the inlet 23, and the blower fan 25 is configured as an intake fan that sucks external air into the duct 16 through the inlet 23. Here, the blower fan 25 is generally configured by a cylindrical case 25A screwed to the inner surface of the right side plate 4, a blade 25B provided in the case 25A, and a motor 25C that rotationally drives the blade 25B. Has been.
[0033]
The package type compressor according to the present embodiment has a configuration as described later, and the operation thereof will be described next.
[0034]
First, when power is supplied to the inverter device 15 and the motor 11 is driven, the compressor main body 10 connected via the belt 12 or the like is driven. Thereby, the compressor main body 10 sucks and compresses air into the cylinders 10A, 10B, and 10C, and discharges the compressed air. The compressed air discharged from the compressor body 10 is temporarily stored in the air tank 13.
[0035]
When the compressor main body 10 is driven, external air is sucked into the soundproof box 1 as cooling air and blown to the compressor main body 10, the motor 11, and the like. Thereby, the cooling air can cool the compressor body 10, the motor 11, and the like.
[0036]
Furthermore, during the compression operation, the inverter device 15 generates heat and the temperature rises, so it is necessary to cool the inverter device 15. Therefore, cooling of the inverter device 15 will be described with reference to FIG.
[0037]
During the compression operation, each blower fan 14 </ b> K provided in the inverter housing box 14 and the blower fan 25 provided in the duct 16 are driven. As a result, the blower fan 25 can force the cooled air outside the soundproof box 1 to flow into the duct 16 from the inlet 23 separately from the cooling air that cools the compressor body 10 and the like. it can.
[0038]
Since the inverter housing box 14 is negatively charged by the blower fan 14K, the cooling air flowing into the duct 16 flows into the inverter housing box 14 through the vent holes 14G and 14H as indicated by arrows. Thereby, the inverter device 15 can be efficiently and sufficiently cooled by the cooled cooling air flowing from the outside.
[0039]
On the other hand, the cooling air heated by cooling the inverter device 15 can flow into the duct 16 through the blower fans 14K and the vent holes 14J, and be discharged from the outlet 24 to the outside of the soundproof box 1. .
[0040]
Here, the guide plates 20 and 21 block the gap between the inflow port 23 and the outflow port 24 so that most of the cooling air flowing into the duct 16 by the blower fan 25 passes through the inverter housing box 14. It can be made to distribute | circulate by the channel | path 22, and many cooling winds can be applied to the inverter apparatus 15. FIG.
[0041]
Thus, according to the present embodiment, the right side plate 4 is provided with the duct 16 surrounding the inverter housing box 14 in the soundproof box 1, and the right side plate 4 has an inlet through which cooling air flows into the duct 16. 23 and an outlet 24 through which cooling air flowing through the duct 16 flows out, and a blower fan 25 for forcibly flowing cooling air into the duct 16 is provided at the inlet 23. It is configured.
[0042]
Accordingly, cold air outside the soundproof box 1 can be blown to the inverter device 15 separately from the cooling air used to cool the compressor body 10 and the like, and the inverter device 15 can be efficiently cooled. can do.
[0043]
As a result, even when the inverter device 15 (inverter housing box 14) is housed in the soundproof box 1 where heat is easily trapped during operation, the temperature of the inverter device 15 can be suppressed below a set reference value. The lifetime of the device 15 can be extended. Further, by accommodating the inverter device 15 in the soundproof box 1, the whole can be reduced in size and the appearance can be improved.
[0044]
Further, since the cooling air can be guided toward the inverter device 15 by the guide plates 20 and 21 provided in the duct 16, the cooling air can be efficiently applied to the inverter device 15, and the inverter device 15 can be increased. The cooling air can be further effectively cooled.
[0045]
Further, since the right side plate 4 of the soundproof box 1 is provided with both the inflow port 23 and the outflow port 24, when installing the package type compressor, a surface other than the right side plate 4, that is, the left side plate 3, The face plate 5 can be disposed close to a wall or the like, and the degree of freedom during installation can be improved.
[0046]
Next, a second embodiment of the present invention will be described in detail with reference to FIG. A feature of the present invention is that a guide plate is provided between the inverter housing box and the soundproof box in the vicinity of the blower fan. In the present embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.
[0047]
Reference numeral 31 denotes another guide plate provided on the lower right side of the inverter housing box 14. The guide plate 31 is made of, for example, a rectangular plate, and is located below the vent hole 14J and accommodates the inverter. It is provided between the box 14 and the right side plate 4.
[0048]
As a result, the guide plate 31 cools the inverter device 15 and when the heated cooling air flows out from the vent hole 14J, the warm cooling air is mixed with the cooled cooling air flowing in from the inlet 23. Can be prevented.
[0049]
Thus, also in the present embodiment configured as described above, it is possible to obtain substantially the same operational effects as those of the first embodiment described above. In particular, according to the present embodiment, the guide plate 31 can prevent the warm cooling air from being mixed with the cooled cooling air and circulate, and the cooling efficiency of the inverter device 15 can be further improved.
[0050]
In the first embodiment, the duct 16 accommodating the inverter housing box 14 is attached to the right side plate 4 of the soundproof box 1 and the right side plate 4 is provided with the inlet 23 and the outlet 24. Explained with an example. However, the present invention is not limited to this. For example, the duct 16 may be attached to the left side plate 3 and the rear side plate 5 of the soundproof box 1, and the inlet 23 and the outlet 24 may be provided. This configuration can be similarly applied to the second embodiment.
[0051]
In the first embodiment, the case where the blower fan 25 formed as an intake fan is provided at the inlet 23 has been described as an example. However, the present invention is not limited to this, and for example, a blower fan configured as an exhaust fan may be provided at the outlet 24. Further, an intake fan may be provided at the inlet 23 and an exhaust fan may be provided at the outlet 24. This configuration can be similarly applied to the second embodiment.
[0052]
In the first embodiment, the inlet 23 and the outlet 24 are provided in the right side plate 4 of the soundproof box 1, and air outside the soundproof box 1 flows into the duct 16 from the inlet 23. The case where the air that has flowed inside is caused to flow out of the soundproof box 1 from the outlet 24 has been described as an example. However, the present invention is not limited to this. For example, the outlet 24 may be provided in the duct 16, and the air that has flowed through the duct 16 may flow out from the outlet 24 into the soundproof box 1. This configuration can be similarly applied to the second embodiment.
[0053]
In the first embodiment, the guide plates 20 and 21 have been described as an example in which they are formed as rectangular plates. However, the present invention is not limited to this. For example, a sound absorbing material may be attached to the guide plates 20 and 21. In this case, the noise of the compressor body 10 and the like transmitted to the duct 16 can be absorbed by the sound absorbing material, sound leakage from the inlet 23 and outlet 24 can be reduced, and silence can be improved. it can. This configuration can be similarly applied to the second embodiment.
[0054]
Furthermore, in each embodiment, the case where the compressor main body 10 is configured as a three-cylinder reciprocating compressor has been described as an example. However, the present invention is not limited to this. For example, a reciprocating compressor having one cylinder, two cylinders, or four cylinders or more may be used. Further, instead of the reciprocating compressor, another compressor such as a scroll compressor may be used.
[0055]
【The invention's effect】
As described above in detail, according to the first aspect of the present invention, the soundproof box is provided with a duct that surrounds the inverter housing box to form a cooling air passage, and cooling air flows into the duct from the outside. An inlet through which the cooling air flowing through the duct flows out, and the soundproof box is located at least one of the inlet and the outlet, and the compressor body Separately from the cooling air that cools the air, a blower fan that guides the cooling air into the duct is provided. Thus, the blower fan can forcibly flow cold air outside the soundproof box into the duct from the inlet, separately from the cooling air that cools the compressor body and the like.
[0056]
Therefore, the duct can circulate the cooled cooling air flowing in from the inlet toward the outlet through the cooling air passage, and can efficiently cool the inverter housing box (inverter device) surrounded by the duct. it can.
[0057]
As a result, even when the inverter device is housed in a soundproof box that tends to accumulate heat during operation, the temperature of the inverter device can be kept below a set reference value, and the life of the inverter device can be extended. Further, by accommodating the inverter device in the soundproof box, the whole can be reduced in size and the appearance can be improved.
[0058]
According to the invention of claim 2, the guide plate for blocking between the inflow port and the outflow port so as to guide the cooling air flowing in from the inflow port through the inverter housing box to the outflow port. Therefore, the guide plate can guide the cooling air flowing into the duct to flow to the outlet through the inverter housing box. Thereby, it is possible to prevent the cooling air that has been heated and circulates from cooling the inverter device, and it is possible to always supply the cooled cooling air to the inverter device.
[0059]
According to invention of Claim 3, a duct is provided in one surface which comprises a soundproof box, and an inflow port and an outflow port are provided in the same surface as one surface of a soundproof box . Thereby , the other surfaces of the soundproof box other than the surfaces provided with the inlet and the outlet can be arranged close to the wall or the like, and the degree of freedom during installation can be improved.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a package type compressor according to a first embodiment of the present invention.
FIG. 2 is a front view of the package compressor as viewed from the front side with the front door removed.
FIG. 3 is a partially broken perspective view showing an inverter housing box, a duct, a blower fan and the like together with a part of a right side plate.
4 is a longitudinal sectional view of an inverter storage box, an inverter device, a duct, a blower fan, and a part of a right side plate as seen from the direction of arrows IV-IV in FIG.
FIG. 5 is a perspective view showing the duct with the lid removed from the duct body together with the inverter housing box and the like.
FIG. 6 is a longitudinal sectional view showing a guide plate according to a second embodiment of the present invention together with an inverter housing box, an inverter device, a duct, a blower fan, and a part of a right side plate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Soundproof box 2 Bottom plate 3 Left side plate 4 Right side plate 5 Rear plate 6 Top plate 7 Front door 10 Compressor main body 11 Motor 14 Inverter accommodation box 15 Inverter device 16 Ducts 20, 21, 31 Guide plate 22 Cooling air passage 23 Inlet 24 Outlet 25 Blower fan

Claims (3)

A soundproof box formed in a box shape, a compressor main body provided in the soundproof box and driven by a motor, and an inverter housing box including an inverter device provided in the soundproof box and driving the motor. In the package type compressor
Within the soundproof box, provided with a duct that forms a cooling air passage surrounding the inverter housing box,
The soundproof box is provided with an inlet through which cooling air flows into the duct from the outside and an outlet through which cooling air flowing through the duct flows out to the outside,
The soundproof box is provided with a blower fan that is positioned at at least one of the inlet and the outlet and guides the cooling air into the duct separately from the cooling air that cools the compressor body. Package type compressor characterized by that. It said duct, claim to cooling air flowing in from the inlet leads to flow outlet through the inverter housing box, comprising a structure provided with a guide plate for shielding between the inlet and outlet The package type compressor according to 1. The package type compressor according to claim 1 or 2, wherein the duct is provided on one surface constituting the soundproof box, and the inflow port and the outflow port are provided on the same surface as the one surface .

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