Packaged Fluid Machinery

Abstract

In packaged fluid machinery, the amount of heat generated in the electrical room where the control board is located is reduced. [Solution] The packaged compressor 1 comprises an electrical chamber 5 with an air intake port 33 that communicates with the outside of the housing 2, an inverter cooling channel 6a located outside the electrical chamber 5, a control board 21 and an operation board 22 located in the electrical chamber 5, and an inverter 23. The inverter 23 comprises a main unit 23a located in the electrical chamber 5, and a cooling fan 23b and cooling fins 23c located in the inverter cooling channel 6a. The electrical chamber 5 is in communication with the area upstream of the cooling fan 23b in the inverter cooling channel 6a via a communication port 37.

Description

Technical Field

[0001] The present invention relates to a fluid machine.

Background Art

[0002] In the packaged compressor disclosed in Patent Document 1, an inverter for controlling a motor that drives the compressor body and a control board are arranged in the same space. The inverter includes a device body, a cooling fan, and cooling fins. The control board and the inverter are arranged in the same space (electrical chamber) inside the housing. The air sucked into the electrical chamber from outside the housing by the cooling fan passes through the control board for cooling and then through the cooling fins, thereby air-cooling the control board and the inverter and discharging them outside the housing.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the packaged compressor of Patent Document 1, not only the control board and the device body of the inverter but also the cooling fan and cooling fins of the inverter are arranged in the electrical chamber, so the amount of heat in the electrical chamber tends to increase.

[0005] An object of the present invention is to reduce the amount of heat in an electrical chamber where a control board is arranged in a packaged fluid machine.

Means for Solving the Problems

[0006] One aspect of the present invention provides a packaged fluid machine comprising: a housing; an electrical chamber provided inside the housing and having a first opening that communicates with the outside of the housing; an inverter cooling channel provided outside the electrical chamber; a control board disposed in the electrical chamber; and an inverter comprising a main unit, a cooling fan, and cooling fins, wherein the main unit is disposed in the electrical chamber and the cooling fan and cooling fins are disposed in the inverter cooling channel; and a first communication section that connects the inverter cooling channel upstream of the cooling fan with the electrical chamber.

[0007] While the control board and inverter unit are located in the electrical room, the inverter's cooling fan and cooling fins are located in the inverter's cooling channel, not in the electrical room. By placing the inverter's cooling fan and cooling fins outside the electrical room in this way, the amount of heat inside the electrical room can be reduced.

[0008] The electrical chamber is provided with a first opening that draws in air from outside the enclosure, and the electrical chamber is connected to the upstream side of the inverter cooling channel from the cooling fan via a first connecting section. Therefore, when the inverter's cooling fan operates, air is drawn into the electrical chamber from outside the enclosure through the first opening, and the drawn-in air flows from the electrical chamber through the first connecting section into the inverter cooling channel. In this way, the electrical chamber can be ventilated by outside air from the inverter's cooling fan, which is located in the inverter cooling channel, i.e., outside the electrical chamber. This eliminates the need to provide a separate fan for ventilation inside the electrical chamber, thus simplifying the configuration of the packaged fluid machine.

[0009] Another aspect of the present invention provides a packaged fluid machine comprising: a housing; an electrical chamber provided within the housing and having a first opening communicating with the outside of the housing; an inverter cooling channel provided within the housing but outside the electrical chamber; a control board disposed in the electrical chamber; and an inverter comprising a main unit, a cooling fan, and cooling fins, wherein the main unit is disposed in the electrical chamber and the cooling fan and cooling fins are disposed in the inverter cooling channel, the inverter cooling channel comprising an intake port and an exhaust port at both ends of the inverter cooling channel communicating with the outside of the housing; and a first communication portion provided spaced apart from the intake port and the exhaust port, which connects the inverter cooling channel upstream of the cooling fan with the electrical chamber.

[0010] The first communication section may be an opening provided in the wall separating the electrical chamber and the inverter cooling channel.

[0011] The first communication section may include a connecting duct that fluidly connects the inverter cooling channel and the electrical chamber.

[0012] By providing a connecting duct, the airflow from the electrical room to the inverter cooling channel becomes smoother, and when the inverter's cooling fan is operating, the air drawn into the electrical room from outside the enclosure through the first opening becomes smoother. In other words, by providing a connecting duct, cooling air can be delivered to the electrical room more smoothly. Furthermore, by providing a connecting duct, the heat influence on the air drawn into the inverter's cooling fan from the equipment located in the electrical room, namely the control board and the inverter's main body, can be reduced.

[0013] The connecting duct may also be in communication with a second opening provided in the upper part of the electrical room.

[0014] Here, "upper part" means at least above the inverter's cooling fan, and preferably close to the very top of the electrical room.

[0015] By fluidly connecting the connection duct to the upper part of the electrical chamber, it is easy to suck out the warm air that tends to gather at the upper part of the electrical chamber from the connection duct.

[0016] The first opening and the second opening may be provided so as not to face each other.

[0017] Since the first opening through which air outside the housing is sucked into the electrical chamber and the second opening through which air flows from the electrical chamber to the connection duct do not face each other, compared with the case where the first opening and the second opening face each other, the path of air flow in the electrical chamber extends. Therefore, the air outside the housing sucked into the electrical chamber through the first opening can be supplied to a wider range in the electrical chamber.

[0018] The packaged fluid machine may further include a machine chamber provided separately from the electrical chamber in the housing, a fluid machine main body disposed in the machine chamber, a motor for driving the fluid machine main body disposed in the machine chamber, a motor provided with a self-cooling fan for cooling the motor itself, and a second communication part for communicating the machine chamber and the electrical chamber with each other.

[0019] In addition to the cooling fan of the inverter, the inside of the electrical chamber can also be cooled by the self-cooling fan of the motor.

Effect of the Invention

[0020] According to the present invention, in a packaged fluid machine, the amount of heat in the electrical chamber where the control board is arranged can be reduced.

Brief Description of the Drawings

[0021] [Figure 1] Perspective view of a packaged fluid machine according to a first embodiment of the present invention. [Figure 2] Front view of the packaged fluid machine of FIG. 1 with the right door removed. [Figure 3] Side sectional view of the packaged fluid machine of FIG. 1. [Figure 4] Front sectional view of the packaged fluid machine of FIG. 1. [Figure 5]Plan sectional view of the packaged fluid machine of FIG. 1. [Figure 6] Rear perspective view of the interior of the packaged fluid machine of FIG. 1. [Figure 7] Front perspective view of the interior of the packaged fluid machine of FIG. 1. [Figure 8] Side sectional view similar to FIG. 3 of the packaged fluid machine according to the second embodiment of the present invention. [Figure 9] Front sectional view similar to FIG. 4 of the packaged fluid machine according to the second embodiment of the present invention.

Mode for Carrying Out the Invention

[0022] (First Embodiment) Referring to FIGS. 1 to 7, the housing 2 of the packaged fluid machine 1 according to the first embodiment of the present invention is generally rectangular parallelepiped, and includes a bottom wall 2a, a top wall 2b, a right door 2c and a left door 2d constituting the front wall, a rear wall 2e, a right side wall 2f, and a left side wall 2g. The space inside the housing 2 defined by these walls is partitioned by a partition wall 3 into two spaces, specifically, a machine room 4 and an electric room 5. Further, as will be described in detail later, an inverter cooling flow path pipe 6 is provided behind the partition wall 3 inside the housing 2.

[0023] The partition wall 3 in the present embodiment includes a main wall 3a, a right side wall 3b, and a left side wall 3c. The main wall 3a is located behind the right door 2c that constitutes a part of the front wall of the housing 2. The right side wall 3b is adjacent to the right side wall 2f of the housing 2, and the rear end is connected to the right end of the main wall 3a. The left side wall 3c is located at an interval to the left of the right side wall 3b, and the rear end is connected to the left end of the main wall 3c. The main wall 3a, the right side wall 3b, and the left side wall 3c extend upward from the bottom wall 2a of the housing 2 and terminate without reaching the top wall 2b of the housing 2. A top wall 3d is provided at the upper ends of the main wall 3a, the right side wall 3b, and the left side wall 3c so as to close the space surrounded by these.

[0024] Inside the housing 2, a machine room 4, an electric room 5, and an inverter cooling flow path pipe 6 are provided.

[0025] The machine room 4 is comprised of the area outside the partition wall 3 within the space of the enclosure 2. The electrical room 5 is the space enclosed by the partition wall 3, the bottom wall 2a of the enclosure 2, the top wall 2b of the enclosure 2, and the right door 2f (front wall) of the enclosure 2. As will be described in detail later, the inverter cooling channel piping 6 is provided within the machine room 4, along the rear of the main wall 3a of the partition wall 3.

[0026] The machine room 4 houses the fluid machine body 10 and the motor 11 that drives the fluid machine 10.

[0027] In this embodiment, the fluid machine body 10 is a multi-stage oil-free screw compressor that compresses air. The fluid machine body 10 can be any machine that converts mechanical energy into fluid energy, or vice versa, such as a blower, pump, or fan. The housing 10 is provided with a structure for taking in intake air to the fluid machine body 10, which is the compressor, and a structure for releasing exhaust air from the fluid machine body 10.

[0028] The motor 11 is equipped with a fan, or self-cooling fan 11a, for air-cooling the motor 11 itself. The self-cooling fan 11a draws air from outside the housing 3 into the machine room 4 through an intake port 31 located on the right side wall 2f of the housing 2 and supplies it to the motor 11 for air-cooling. The air drawn into the machine room 4 by the self-cooling fan 11a is discharged outside the housing 3 through an exhaust port 32 located on the top wall 2b of the housing 2.

[0029] The electrical room 5 houses the control board 21 and the operation board 22 (which together constitute the control panel), as well as a portion of the inverter 23. Specifically, the inverter 23 comprises a main unit 23a, a cooling fan 23b, and cooling fins 23c, with only the main unit 23a located in the electrical room 5.

[0030] The electrical room 5 is fluidly connected to the outside of the housing 2 via an air intake 33 provided in the right door 2 (front wall) of the housing 2. The air intake 33 is positioned relatively lower in the height direction of the electrical room 5, that is, it is located at the bottom of the electrical room 5, so as to communicate with the outside of the housing 2. The electrical room 5 is also connected to the machine room 4 via a communication port 34 provided in the main wall 3a of the partition wall 3.

[0031] As described above, an inverter cooling channel piping 6 is provided behind the partition wall 3 inside the housing 2. The inverter cooling channel piping 6 comprises a horizontal duct 6a extending laterally along the bottom of the main wall 3a of the partition wall 3, and a vertical duct 6b connected to the left side of the horizontal duct 6a and extending vertically. The right end of the horizontal duct 6a, which is the starting point of the inverter cooling channel piping 6, is fluidly connected to an intake port 35 provided on the right side wall 2f of the housing 2. On the other hand, the upper end of the vertical duct 6a, which is the end point of the inverter cooling channel piping 6, is fluidly connected to an exhaust port 36 provided on the top wall 2b of the housing 2. In this way, the inverter cooling channel piping 6 communicates with the outside of the housing 2 at both ends through the intake port 35 and the exhaust port 36.

[0032] The inverter 23's cooling fan 23b and cooling fins 23c are located within the inverter cooling channel 6c, which is defined by the inverter cooling channel piping 6. Specifically, the cooling fan 23b and cooling fins 23c are located within the vertical duct 6a of the inverter cooling channel piping 6. When the cooling fan 23b operates, air from outside the housing 2 is drawn in from the intake port 35 into the inverter cooling channel 6c (the portion defined by the horizontal duct 6a). The air drawn into the inverter cooling channel 6c rises through the portion defined by the vertical duct 6b, passes through the cooling fins 23c and the cooling fan 23b in that order, and is finally discharged outside the housing 2 from the exhaust port 36. In this way, an airflow is created within the inverter cooling channel piping 6, moving from the intake port 35 to the exhaust port 36.

[0033] The inverter cooling channel 6c upstream of the cooling fan 23b is in communication with the electrical room 5 via a communication port 37 provided in the main wall 3a of the partition wall 3. The communication port 37 is located at a distance from the intake port 35 and the exhaust port 36 and is in communication with the inverter cooling channel piping 6.

[0034] When the motor 11's self-cooling fan 11a operates, air from the electrical room 5 flows out to the machine room 4 through the communication port 34, and air from outside the housing 2 flows into the electrical room 5 through the intake port 33. As a result, the electrical room 4 is ventilated or air-cooled.

[0035] When the cooling fan 23 of the inverter 23 is activated, air from outside the housing 2 is drawn in through the intake port 35 into the inverter cooling channel 6c and flows towards the exhaust port 36, and the inverter 23 is cooled by the air cooling of the cooling fins 23c.

[0036] The control board 21, the operation board 22, and the main body 23a of the inverter 23 are located in the electrical room 5, but the cooling fan 23b and cooling fins 23c of the inverter 23 are located in the inverter cooling channel 6a, not in the electrical room 5. By placing the cooling fan 23b and cooling fins 23c of the inverter 23 outside the electrical room 5 in this way, the amount of heat inside the electrical room 5 can be reduced.

[0037] The electrical chamber 5 is provided with an air intake port 33 that draws in air from outside the housing 2. Furthermore, the electrical chamber 5 is connected to the upstream side of the cooling fan 23b of the inverter cooling passage 6a via a communication port 37. Therefore, when the cooling fan 23b operates, air from outside the housing 2 is drawn into the electrical chamber 5 through the air intake port 33, and the drawn-in air flows from the electrical chamber 5 through the communication port 37 to the inverter cooling passage 6a. In this way, the cooling fan 23b of the inverter 23, which is located in the inverter cooling passage 6a, i.e., outside the electrical chamber 5, can ventilate or air-cool the inside of the electrical chamber 5 with air from outside the housing 2. This eliminates the need to provide a separate fan for ventilation inside the electrical chamber 5, in addition to the cooling fan 23b of the inverter 23, thus simplifying the configuration of the packaged fluid machine 1.

[0038] (Second Embodiment) A packaged fluid machine 1 according to a second embodiment of the present invention will be described with reference to Figures 8 and 9. The second embodiment is the same as the first embodiment in respects that are not specifically mentioned in the following description.

[0039] In this embodiment, instead of the communication port 37 in the first embodiment (see, for example, Figure 3), the inverter cooling passage 6a upstream of the cooling fan 23b and the electrical room 5 are fluidly connected by a connecting duct 24. The connecting duct 24 is provided along the rear of the main wall 3a of the partition wall 3. The connecting duct 24 comprises a horizontal duct 24a that extends laterally with one end connected to the horizontal duct 6a of the inverter cooling passage piping 6, and a vertical duct 24b that extends upward with the other end connected to the horizontal duct 24a. The other end of the vertical duct 24b is fluidly connected to a communication port 38 provided on the upper part of the main wall 3a of the partition wall 3.

[0040] Regarding the placement of the communication port 38, "upper part" means at least above the cooling fan 23b of the inverter 23, and it is preferable that it be close to the top of the electrical room 5.

[0041] By providing the connecting duct 24, the airflow from the electrical room 5 to the inverter cooling channel 6a becomes smoother, and when the cooling fan 23b of the inverter 23 is operating, the intake of air from outside the housing 2 to the electrical room 5 via the intake port 33 becomes smoother. In other words, by providing the connecting duct 24, cooling air can be delivered to the electrical room 5 more smoothly. In addition, by providing the connecting duct 24, the heat influence on the air drawn into the cooling fan 23b of the inverter 23 from the equipment located inside the electrical room 5, namely the control board 21, the operation board 22, and the main body 23a of the inverter 23 can be reduced.

[0042] By fluidly connecting the connecting duct 24 to the upper part of the electrical room 5, it becomes easier to draw out the warm air that tends to accumulate at the top of the electrical room 5 through the connecting duct 24.

[0043] Furthermore, it is preferable to fluidly connect the connecting duct 24 to the upper part of the electrical room 5 and to provide an air intake port 33 that communicates with the lower part of the electrical room 5. By doing so, the warmed air from the upper part of the electrical room 5 flows from the electrical room 5 through the communication port 37 to the inverter cooling channel 6, thereby promoting ventilation of the electrical room 5.

[0044] As mentioned above, by providing a communication port 38 at the top through which air flows from the electrical room 5 to the connecting duct 24, the communication port 38 does not face the intake port 33 (located at the bottom of the right door 2c of the housing 2) which takes in air from outside the housing 2 into the electrical room 5. Because the intake port 33 and the communication port 38 do not face each other, the airflow path within the electrical room 5 is extended compared to the case where the intake port 33 and the communication port 38 face each other, so that the air from outside the housing drawn into the electrical room from the intake port 33 can be supplied to a wider area within the electrical room. [Explanation of Symbols]

[0045] 1. Packaged Fluid Machine 2 cabinets 2a Bottom wall 2b Top wall 2c Right Door 2d Left door 2e back wall 2f right side wall 2g left side wall 3 Bulkhead 3a Main wall 3b Right side wall 3c Left side wall 3d top wall 4 Machine room 5. Electrical Room 6. Inverter cooling channel piping 6a Horizontal duct 6b Vertical duct 6c Inverter Cooling Channel 10 Fluid machine body 11 Motor 11a Self-cooling fan 21 Control board 22 Control board 23 Inverter 23a Equipment body 23b Cooling fan 23c cooling fins 24 connecting ducts 24a Horizontal duct 24b Vertical duct 31 Air intake 32 Exhaust vents 33 Air intake 34 connecting ports 35 Air intake 36 Exhaust vents 37 connecting ports 38 connecting ports

Claims

1. The casing and An electrical room is provided inside the aforementioned enclosure and has a first opening that communicates with the outside of the enclosure, An inverter cooling channel provided outside the electrical room, A control board located in the aforementioned electrical room, An inverter comprising a main unit, a cooling fan, and cooling fins, wherein the main unit is located in the electrical chamber, and the cooling fan and cooling fins are located in the inverter cooling channel, A first communication section connects the inverter cooling channel upstream of the cooling fan to the electrical chamber. A packaged fluid machine equipped with the following features.

2. The casing and An electrical room is provided inside the aforementioned enclosure and has a first opening that communicates with the outside of the enclosure, An inverter cooling channel is provided inside the housing outside the electrical chamber, A control board located in the aforementioned electrical room, An inverter comprising a main unit, a cooling fan, and cooling fins, wherein the main unit is located in the electrical chamber, and the cooling fan and cooling fins are located in the inverter cooling channel, A packaged fluid machine equipped with, The inverter cooling channel has an intake port and an exhaust port at both ends of the inverter cooling channel that communicate with the outside of the housing, A first communication section is provided spaced apart from the intake port and the exhaust port, and connects the inverter cooling passage upstream of the cooling fan with the electrical chamber. A packaged fluid machine equipped with the following features.

3. The packaged fluid machine according to claim 1 or 2, wherein the first communication section is an opening provided in the wall separating the electrical chamber and the inverter cooling channel.

4. The packaged fluid machine according to claim 1 or 2, wherein the first communication section includes a connecting duct that fluidly connects the inverter cooling channel and the electrical chamber.

5. The packaged fluid machine according to claim 4, wherein the connecting duct is in communication with a second opening provided in the upper part of the electrical room.

6. The packaged fluid machine according to claim 5, wherein the first opening and the second opening are provided so as not to face each other.

7. A machine room is provided within the aforementioned enclosure, separated from the electrical room, The fluid machine body located in the aforementioned machine room, A motor that drives the fluid machine body located in the machine room, the motor having a self-cooling fan for cooling the motor itself, A second connecting section that connects the machine room and the electrical room to each other. A packaged fluid machine according to claim 1 or 2, further comprising:

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