JP7281249B2 - Inverter device and chilling unit - Google Patents

Description

The present invention relates to an inverter device and a chilling unit.

Patent Literature 1 discloses a chilling unit in which a plurality of air heat exchangers are arranged in the upper part, and components such as a control box other than the air heat exchangers of the refrigerating cycle are arranged in a lower accommodating part.

Japanese Patent No. 5401563

The chilling unit is provided with a water pump, and the chilling unit is provided with an inverter for driving the water pump and a housing housing the same.
By the way, when using an inverter for controlling a water pump, for example, as described above, it is necessary to prevent the inverter from being splashed with rain water, drain water, or the like. For this reason, the housing housing for the inverter has a box shape and is arranged in the housing portion at the bottom of the chilling unit. A fan is provided in the housing to suppress heat generation of the inverter. By operating the fan, air taken in from the outside of the housing is brought into contact with the inverter, thereby taking heat from the inverter and suppressing heat generation. The air that has passed through the inverter is discharged to the outside of the housing from an outlet formed in the housing.

The air whose temperature is raised by taking heat from the inverter rises inside the housing. However, in order to prevent water from entering the housing, the air outlet is formed on a side surface of the housing other than the top surface. For this reason, it is difficult for air whose temperature has risen to be discharged to the outside of the housing, and the temperature inside the housing rises due to exhaust heat from the inverter. As a result, the cooling efficiency of the inverter is reduced.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an inverter device and a chilling unit that can suppress a decrease in the cooling efficiency of the inverter.

An inverter device according to an aspect of the present invention includes an inverter and an inverter housing housing, wherein the inverter housing housing includes a hollow box-shaped housing body that houses the inverter, and a a flow path forming portion provided to form an air flow path for cooling the inverter and extending at an angle with respect to the bottom surface of the housing main body; and an exhaust port formed on an extension line of the flow path formed by the flow path forming section and discharging the air from the flow path, the flow path forming section comprising: an inverter supporting portion that supports the inverter, wherein the flow path is formed at a position sandwiched between the inverter and the inverter supporting portion; and the housing body intersects an inverter supporting surface of the inverter supporting portion. and a housing cover section detachably provided in the opening, wherein the inverter supported by the inverter support section has an operation section facing obliquely upward. are doing.
With this configuration, the operation unit can be exposed by removing the housing cover, so the operation unit can be viewed and operated more easily than when the operation unit of the inverter faces sideways. easier.

In addition, the inverter device according to the aspect described above may further include wiring extending downward from a lower end portion of the inverter.
By configuring in this way, the wiring of the inverter can be easily visually recognized by removing the housing cover portion, and the wiring maintenance work and the like can be easily performed.

A chilling unit according to an aspect of the present invention includes an inverter device as described above.

By configuring in this way, it is possible to prevent the air whose temperature is increased by cooling the inverter from accumulating in the housing body, and to prevent the cooling efficiency of the inverter from decreasing.

According to the inverter device and the chilling unit according to the present invention, it is possible to prevent the cooling efficiency of the inverter from decreasing.

1 is a perspective view showing the appearance of a chilling unit according to one embodiment of the present invention; FIG. FIG. 4 is a vertical cross-sectional view showing the configuration of an inverter device provided in the chilling unit; It is a perspective view which shows the external appearance of the said inverter apparatus. It is a perspective view which shows the housing|casing base part of the said inverter apparatus. It is a perspective view which shows the state which installed the inverter in the said housing|casing base part.

EMBODIMENT OF THE INVENTION Hereinafter, with reference to an accompanying drawing, the form for implementing the inverter accommodation housing|casing, inverter apparatus, and chilling unit by this invention is demonstrated. However, the invention is not limited to this embodiment only.

As shown in FIG. 1 , the chilling unit 1 includes a heat exchange section 10 and a machine chamber section 20 arranged below the heat exchange section 10 .
The heat exchange portion 10 has a substantially rectangular shape in plan view. In the following description, the short side direction of the heat exchange section 10 in the horizontal plane is the front-back direction X, the long side direction of the heat exchange section 10 in the horizontal plane is the width direction Y, and the direction orthogonal to the front-back direction X and the width direction Y is up and down. Let's call it direction Z.

The heat exchange section 10 is provided above the machine chamber section 20 in the vertical direction Z. As shown in FIG. The heat exchange section 10 includes an air heat exchanger 11 and an air blower 12 .

The air heat exchangers 11 are provided on both sides in the front-rear direction X. As shown in FIG. Between the air heat exchanger 11A on the first side in the front-rear direction X and the air heat exchanger 11B on the second side in the front-rear direction X, the distance in the front-rear direction X gradually increases from below to above in the vertical direction Z. They are arranged in a substantially V shape when viewed from the width direction Y so as to expand.

The blower 12 blows air to the air heat exchanger 11 . A plurality of blowers 12 are provided along the width direction Y on the upper surface of the heat exchange section 10 .

The machine room section 20 includes a base frame 21 , a machine room housing 22 and an inverter device 30 .
The base frame 21 is provided on the installation surface. The base frame 21 has a rectangular frame shape that is longer in the width direction Y than in the front-rear direction X in plan view.

A machine room housing 22 is provided on the base frame 21 . The heat exchange section 10 is provided on the machine room housing 22 . The machine room housing 22 is in the shape of a hollow box, and accommodates therein a plurality of devices that constitute a refrigeration cycle. Devices housed in the machine room housing 22 include, for example, a control box, a compressor, a water heat exchanger, etc. (none of which are shown). The compressor, water heat exchanger, and air heat exchanger 11 are sequentially connected by refrigerant piping (not shown). A water pump is connected to the water heat exchanger to supply and discharge hot and cold water. The water pump is driven by an inverter device 30, which will be described later.

As shown in FIG. 2 , the inverter device 30 is housed within the machine room housing 22 of the machine room section 20 . The inverter device 30 includes an inverter 31 and an inverter housing housing 40 housing the inverter 31 .

The inverter 31 includes an inverter board (not shown) for performing inverter control with a control box in a rectangular parallelepiped casing 31c. A surface 31a of a casing 31c of the inverter 31 is provided with an operation unit 31s having a switch (not shown) for operating the inverter 31 and a display unit (not shown) indicating the operating state of the inverter 31 and the like. The inverter 31 has a wiring 31h extending from a lower end portion 31d of a casing 31c to be connected to a control box (not shown), a power supply (not shown), and the like.

A channel portion 32 is integrally provided on the rear surface 31 b of the inverter 31 . The flow path portion 32 has a tubular shape with a rectangular cross section that continues from the lower end portion 31d side of the casing 31c toward the upper end portion 31t side. Air for cooling the inverter 31 flows along the back surface 31 b of the inverter 31 in the flow path portion 32 .

The inverter housing housing 40 includes a housing body 41 , an inverter support portion (flow path forming portion) 42 , an intake port 44 , an exhaust port 45 and a fan 46 .

As shown in FIGS. 2 and 3, the housing body 41 has a hollow box shape as a whole and accommodates the inverter 31 therein. The housing body 41 includes a housing base portion 47 and a housing cover portion 48 .
As shown in FIGS. 2 and 4, the housing base portion 47 includes a bottom plate (bottom surface) 47b, a pair of side plates 47c, and a back plate 47d. The bottom plate 47b is positioned in the horizontal plane and installed on the base frame 21 . More specifically, the bottom plate 47b is supported by the support 21a provided on the base frame 21, so that a gap is formed between the bottom plate 47b and the base frame 21. As shown in FIG. The pair of side plates 47c extend upward in the vertical direction Z from both ends in the width direction Y of the bottom plate 47b. The back plate 47d extends upward in the vertical direction Z from the rear end portion in the front-rear direction X of the bottom plate 47b, and connects the pair of side plates 47c. Thus, the housing base portion 47 has an opening 47a that opens upward in the up-down direction Z and forward in the front-rear direction X. As shown in FIG.

As shown in FIGS. 2 and 3, the housing cover portion 48 is detachable from the housing base portion 47 with screws (not shown) or the like. The housing cover portion 48 closes the opening 47 a when attached to the housing base portion 47 . The housing cover portion 48 includes a top surface portion 48a and a side surface portion 48b, and has a substantially L shape when viewed from the width direction Y. As shown in FIG. The top surface portion 48 a is provided on the pair of side plates 47 c of the housing base portion 47 and forms the top surface of the housing body 41 . The side surface portion 48b hangs downward in the vertical direction Z from the front end portion in the front-rear direction X of the top surface portion 48a. The side surface portion 48b closes the space between the pair of side plates 47c from the front in the front-rear direction X, and forms a side surface facing the front in the front-rear direction X of the housing body 41 .
Here, a rear end portion 48 e of the top surface portion 48 a in the front-rear direction X protrudes further rearward in the front-rear direction X than the back plate 47 d of the housing base portion 47 .

As shown in FIGS. 2 and 4 , the inverter support portion 42 is provided inside the housing body 41 and supports the inverter 31 and the flow path portion 32 . Therefore, the channel portion 32 is arranged so as to be sandwiched between the inverter support portion 42 and the inverter 31 . The inverter support portion 42 is formed by providing a flat plate material 42p that is inclined with respect to a horizontal plane and a vertical plane. The inverter support portion 42 is gradually inclined upward from the front in the front-rear direction X toward the rear. The inverter support portion 42 supports the flow path portion 32 provided on the rear surface 31b of the inverter 31 so as to face an inverter support surface 42f facing obliquely upward. Thereby, the inverter 31 and the flow path part 32 supported by the inverter support part 42 are inclined and supported. The channel portion 32 is inclined and supported by the inverter support portion 42 , thereby forming the channel R that extends linearly while being inclined with respect to the bottom surface of the housing body 41 .

Further, as shown in FIGS. 2 and 5, the inverter 31 supported by the inverter support portion 42 has the operation portion 31s provided on the surface 31a directed obliquely upward. The opening 47a of the housing base portion 47 opens the interior of the housing body 41 in a direction crossing the inverter support surface 42f of the inverter support portion 42. As shown in FIG. Therefore, in the inverter 31 supported by the inverter support portion 42, the operating portion 31s provided on the surface 31a faces the opening 47a side.

As shown in FIG. 4, the inverter support portion 42 is formed with a plurality of inverter mounting holes 42g for fixing the inverter 31 with bolts (not shown) or the like. The inverter mounting holes 42 g are provided in a plurality of sets with mutually different positions so that, for example, a plurality of types of inverters 31 having different sizes can be selectively selected and mounted on the inverter support portion 42 . In this embodiment, for example, three sets of inverter mounting holes 42ga, 42gb, and 42gc are provided.

As shown in FIG. 2, the plate member 42p forming the inverter support portion 42 is provided with a gap S between the bottom plate 47b and the back plate 47d of the housing body 41 on the side opposite to the inverter support portion 42. ing. A gap communication portion 42h that connects the flow path R and the gap S is formed in the central portion of the plate member 42p. The gap communicating portion 42h is a hole having a square shape when viewed from above.

The intake port 44 takes air into the flow path R from the outside of the housing body 41 . The intake port 44 is formed so as to penetrate in the vertical direction Z through a bottom plate 47b of a housing base portion 47 forming the bottom surface of the housing body 41 . The inlet 44 opens downward in the vertical direction Z inside the base frame 21 that supports the inverter housing housing 40 .
The intake port 44 is formed on the extension line L of the flow path R. As shown in FIG. The intake port 44 is formed so as to face the lower end portion of the flow path R. As shown in FIG. Further, the intake port 44 is formed to communicate with the gap S between the plate member 42p forming the inverter support portion 42 and the bottom plate 47b and the back plate 47d of the housing body 41 .

The discharge port 45 discharges the air inside the flow path R to the outside of the housing body 41 . The outlet 45 is formed on the extension line L of the flow path R. As shown in FIG. The discharge port 45 is located above the flow path R and is formed so as to penetrate the back plate 47d of the housing body 41 in the front-rear direction X. As shown in FIG. The discharge port 45 is formed by notching the upper end portion of the back plate 47d. Thus, the discharge port 45 is formed so as to face the upper end portion of the flow path R. As shown in FIG. The discharge port 45 is formed so that the entire area of the opening Ra1 above the flow path R can be visually recognized when the opening of the flow path R is viewed from the direction in which the extension line L extends (the direction in which the flow path R extends). I hope it is.

The fan 46 is provided in the flow path R inside the flow path section 32 . The fan 46 is driven by a motor (not shown) that serves as a drive source, and generates an air flow in the flow path R from the lower intake port 44 side toward the upper outlet port 45 side. In this embodiment, the fan 46 is provided in the upper part in the flow path R. As shown in FIG.

In such an inverter device 30, when the fan 46 is operated, air is drawn into the flow path R from the outside of the housing body 41 through the intake port 44 and the opening Ra2 at the bottom of the flow path R. As shown in FIG. In addition, since the gap S on the back side of the inverter support portion 42 communicates with the outside of the housing body 41 through the intake port 44, the fan 46 is operated to allow the flow path R to pass through the gap S and the gap communicating portion 42h. , the air outside the housing body 41 is introduced.
The air taken into the flow path R flows from the intake port 44 toward the discharge port 45 obliquely upward. Inverter 31 is cooled by this air coming into contact with back surface 31b of inverter 31 .
The air heated by cooling the inverter 31 further flows diagonally upward in the flow path R and is discharged to the outside of the housing body 41 through the discharge port 45 .

Further, in the inverter device 30 , the housing cover portion 48 of the housing main body 41 is removed from the housing base portion 47 when the inverter 31 is operated, maintained, or the like. Then, as shown in FIG. 5, the operation portion 31s and the wiring 31h of the inverter 31 supported by the inverter support portion 42 face the opening 47a side of the housing base portion 47. As shown in FIG. As a result, the operation portion 31s and the wiring 31h are easily visible through the opening 47a.

According to the inverter housing housing 40, the inverter 31, and the chilling unit 1 as described above, the air flow path R formed by the flow path section 32 being supported by the inverter support section 42 extends obliquely. A discharge port 45 is formed on the extension line L of the flow path R. As shown in FIG. As a result, the air that cools the inverter 31 and has flowed through the flow path R is efficiently discharged from the discharge port 45 . As a result, it is possible to prevent the air whose temperature is increased by cooling the inverter 31 from accumulating in the housing body 41 and to prevent the cooling efficiency of the inverter 31 from decreasing.

In addition, the inverter 31 can be efficiently cooled by generating an air flow in the flow path R with the fan 46 .

Further, the plate member 42p forming the inverter support portion 42 is provided with a gap S between it and the inner peripheral surface of the housing body 41 on the side opposite to the inverter 31, and the plate member 42p communicates with the gap S. A gap communicating portion 42h is formed. As a result, the air in the gap S between the inverter support portion 42 and the inner peripheral surface of the housing body 41 can be taken into the flow path R through the gap communication portion 42h. Therefore, the amount of air flowing through the flow path R can be increased, and the cooling efficiency of the inverter 31 can be enhanced.

Furthermore, since the intake port 44 communicates with the gap S, the air outside the housing body 41 can be taken into the gap S through the intake port 44 . As a result, more air outside the housing body 41 can be taken in through the gap S and the gap communicating portion 42h, and the cooling efficiency of the inverter 31 is enhanced.

Moreover, the inverter support part 42 can incline one surface of the inverter 31 along the flow path R by tilting and supporting the inverter 31 corresponding to the flow path R. FIG. As a result, the air flowing through the flow path R can be efficiently brought into contact with the inverter 31 for cooling. In addition, by inclining the inverter 31, the height of the inverter housing housing 40 can be suppressed.

Further, the inverter support portion 42 has a plurality of sets of inverter mounting holes 42g. As a result, it is possible to appropriately select and provide a plurality of types of inverters 31 having different sizes and the like in the inverter housing housing 40 . This increases the versatility of the inverter housing housing 40 .

Further, the housing main body 41 includes a housing base portion 47 having an opening 47 a and a housing cover portion 48 detachably provided in the opening 47 a of the housing base portion 47 . With this configuration, when the housing cover portion 48 is removed from the opening 47a of the housing base portion 47, the inverter 31 provided in the housing base portion 47 can be easily visually recognized through the opening 47a. As a result, operations such as operation and maintenance of the inverter 31 can be easily performed.

An end portion 48e of the top surface portion 48a of the housing cover portion 48 is formed on the back plate 47d of the housing body 41 in which the discharge port 45 is formed, and protrudes outside the housing body 41 beyond the discharge port 45. . As a result, the top surface portion 48 a functions like a canopy, and water from the outside can be prevented from entering the housing body 41 through the discharge port 45 .

In addition, since the intake port 44 is formed in the bottom surface of the housing body 41 , the intake port 44 opens downward from the bottom surface of the housing body 41 . As a result, it is possible to prevent water from entering the housing body 41 from the outside through the inlet 44 .

Further, the discharge port 45 is positioned above the flow path R and formed in the back plate 47 d of the housing body 41 . With this configuration, it is possible to prevent water from entering the housing body 41 from the outside through the outlet 45 .

In addition, the inverter 31 supported by the inverter support portion 42 has an operation portion 31s facing obliquely upward. Such a configuration makes it easier to visually recognize and operate the operation portion 31s than when the operation portion 31s of the inverter 31 faces sideways.
The inverter 31 also has a wiring 31h extending downward from a lower end portion 31d of the inverter 31 . By removing the housing cover portion 48, the operation portion 31s and the wiring 31h of the inverter 31 can be easily visually recognized, and the operation of the operation portion 31s and the maintenance work of the operation portion 31s and the wiring 31h can be easily performed. can.

(Other embodiments)
It should be noted that the inverter housing housing, the inverter device, and the chilling unit of the present invention are not limited to the above-described embodiments described with reference to the drawings, and various modifications are conceivable within the technical scope thereof.
For example, in the above-described embodiment, the flow path portion 32 forming the flow path R is provided behind the inverter 31 (diagonally below), but the flow path portion 32 is disposed diagonally above the inverter 31. may That is, the flow path R may be arranged on the upper surface of the inverter 31 .
Moreover, in the above-described embodiment, the inverter 31 and the flow path portion 32 are provided integrally, but the present invention is not limited to this. You may make it provide the inverter 31 and the flow-path formation part which forms the flow-path R separately. In that case, the inverter supporting portion that supports the inverter 31 and the flow path forming portion that forms the flow path R may be provided integrally or separately.

Also, the gap communicating portion 42h may not necessarily be provided. In this case, the intake port 44 does not have to communicate with the gap S.

Further, the housing main body 41 as shown in the above embodiment can be replaced with the housing of an existing inverter device. By replacing with the housing body 41, the existing inverter device can be used as the inverter device 30 shown in the above embodiment.
In addition to this, it is possible to select the configurations described in the above embodiments or to change them to other configurations as appropriate without departing from the gist of the present invention.

1 Chilling unit 10 Heat exchange parts 11, 11A, 11B Air heat exchanger 12 Air blower 20 Machine room part 21 Base frame 21a Support stand 22 Machine room housing 30 Inverter device 31 Inverter 31a Surface 31b Back (side)
31c Casing 31d Lower end 31h Wiring 31s Operation part 31t Upper end 32 Channel part 40 Inverter housing housing 41 Housing main body 42 Inverter supporting part (flow path forming part)
42f Inverter support surfaces 42g, 42ga, 42gb, 42gc Inverter mounting hole 42h Clearance communicating portion 42p Plate material 44 Inlet 45 Outlet 46 Fan 47 Housing base 47a Opening 47b Bottom plate (bottom)
47c Side plate 47d Back plate 48 Housing cover portion 48a Top surface portion 48b Side surface portion 48e End portion L Extension line R Channel Ra1 Opening Ra2 Opening S Gap X Front-rear direction Y Width direction Z Vertical direction

Claims (3)

an inverter;
an inverter housing housing;
with
The inverter housing housing includes:
a hollow box-shaped housing body that houses the inverter;
a flow path forming portion provided inside the housing body, extending obliquely with respect to the bottom surface of the housing body, and forming an air flow path for cooling the inverter;
an intake port that takes in air from the outside of the housing body into the flow path;
a discharge port formed on an extension line of the flow path formed by the flow path forming portion and through which the air is discharged from the flow path;
has
The flow path forming portion is an inverter support portion that supports the inverter,
The flow path is formed at a position sandwiched between the inverter and the inverter support,
The housing body is
a housing base portion having an opening in a direction intersecting the inverter support surface of the inverter support portion;
a housing cover portion detachably provided in the opening;
with
The inverter device, wherein the inverter supported by the inverter support portion has an operation portion facing obliquely upward. 2. The inverter device according to claim 1 , further comprising wiring extending downward from a lower end of said inverter. A chilling unit comprising the inverter device according to claim 1 or 2 .

Images