Encapsulated fluid machine

Abstract

This invention provides a packaged fluid machine. The objective is to reduce the heat in the electrical chamber where the control panel is located in the packaged fluid machine. The packaged compressor (1) includes an electrical chamber (5) with an air intake (33) communicating with the outside of a housing (2), an inverter cooling flow path (6c) 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) includes a main body (23a) located in the electrical chamber (5), and a cooling fan (23b) and cooling fins (23c) located in the inverter cooling flow path (6c). The inverter cooling flow path (6c) is connected to the electrical chamber (5) upstream of the cooling fan (23b) via a connection port (37).

Description

Technical Field

[0001] This invention relates to fluid machinery. Background Technology

[0002] In the packaged compressor disclosed in Patent Document 1, an inverter for controlling the motor driving the compressor body and a control baseboard are arranged in the same space. The inverter includes a main body, a cooling fan, and cooling fins. The control baseboard and the inverter are arranged in the same space (electrical compartment) within the enclosure. Air drawn from outside the enclosure into the electrical compartment by the cooling fan is cooled by passing through the control baseboard and then through the cooling fins, thus air-cooling the control baseboard and the inverter before being discharged outside the enclosure.

[0003] Existing technical documents Patent documents Patent document 1: Japanese Patent Application Publication No. 2016-89665. Summary of the Invention

[0004] The problem that the invention aims to solve The encapsulated compressor in Patent Document 1 has a tendency to increase the heat in the electrical compartment because it not only houses the main body of the equipment, which includes the control base and inverter, but also the inverter's cooling fan and cooling fins.

[0005] The objective of this invention is to reduce the heat in the electrical compartment where the control base is located in encapsulated fluid machinery.

[0006] Methods for solving problems One aspect of the present invention provides an encapsulated fluid machine comprising: a housing; an electrical chamber disposed within the housing and having a first opening communicating with the outside of the housing; an inverter cooling flow path disposed outside the electrical chamber; a control base plate disposed within the electrical chamber; an inverter comprising a main body, a cooling fan, and cooling fins, the main body being disposed within the electrical chamber, the cooling fan and the cooling fins being disposed within the inverter cooling flow path; and a first connecting portion, such that an upstream side of the inverter cooling flow path communicates with the electrical chamber above the cooling fan.

[0007] Although the control base and inverter are located in the electrical compartment, the inverter's cooling fans and fins are located in the inverter's cooling path, not in the electrical compartment. By placing the inverter's cooling fans and fins outside the electrical compartment, the heat inside the electrical compartment can be reduced.

[0008] The electrical compartment has a first opening for drawing air from outside the enclosure. The inverter cooling flow path, upstream of the cooling fan, is connected to the electrical compartment via a first connecting portion. Therefore, when the inverter cooling fan operates, air from outside the enclosure is drawn into the electrical compartment through the first opening, and the drawn-in air flows from the electrical compartment to the inverter cooling flow path via the first connecting portion. In this way, the inverter cooling fan, located in the inverter cooling flow path and outside the electrical compartment, can ventilate the electrical compartment using air from outside the enclosure. Therefore, it is not necessary to install a separate fan besides the inverter cooling fan for ventilation of the electrical compartment, which simplifies the structure of the encapsulated fluid machinery.

[0009] Another aspect of the present invention provides an encapsulated fluid machinery comprising: a housing; an electrical chamber disposed within the housing and having a first opening communicating with the outside of the housing; an inverter cooling flow path disposed within the housing and outside the electrical chamber; a control base plate disposed within the electrical chamber; and an inverter comprising a main body, a cooling fan, and cooling fins, the main body being disposed within the electrical chamber, and the cooling fan and cooling fins being disposed within the inverter cooling flow path; the inverter cooling flow path comprising: an intake port and an exhaust port communicating with the outside of the housing at both ends; and a first connecting portion disposed away from the intake port and the exhaust port, such that the inverter cooling flow path communicates with the electrical chamber upstream of the cooling fan.

[0010] Alternatively, the aforementioned first connecting portion can be an opening in the wall that separates the aforementioned electrical chamber from the aforementioned inverter cooling flow path.

[0011] Alternatively, the aforementioned first connecting portion may include a connecting pipe that fluidly connects the aforementioned inverter cooling flow path to the aforementioned electrical compartment.

[0012] By installing connecting pipes, the airflow from the electrical compartment to the inverter cooling path becomes smoother, and the intake of air from outside the enclosure into the electrical compartment via the first opening becomes smoother when the inverter's cooling fan operates. In other words, by installing connecting pipes, cooling air can be delivered to the electrical compartment more smoothly. Furthermore, by installing connecting pipes, the thermal impact on the equipment located within the electrical compartment—namely, the control base and the main body of the inverter—from the air drawn in by the inverter's cooling fan can be reduced.

[0013] Alternatively, the aforementioned connecting pipe can be connected to the second opening located at the top of the aforementioned electrical room.

[0014] Here, "upper part" refers to the part at least above the inverter's cooling fan, preferably the uppermost part near the electrical compartment.

[0015] By fluidly connecting the connecting pipe to the upper part of the electrical room, it is easy to draw out the warm air that tends to concentrate in the upper part of the electrical room from the connecting pipe.

[0016] Alternatively, the aforementioned first opening and the aforementioned second opening can be arranged in a manner that is not opposite to each other.

[0017] The first opening through which air from outside the enclosure is drawn into the electrical compartment is not opposite to the second opening through which air flows from the electrical compartment to the connecting pipe. Compared to the case where the first and second openings are opposite to each other, the path of air flow in the electrical compartment is extended, so a larger area of ​​air drawn from outside the enclosure into the electrical compartment through the first opening can be supplied into the electrical compartment.

[0018] Alternatively, the encapsulated fluid machinery may also include: a mechanical chamber, which is disposed separately from the electrical chamber within the aforementioned housing; a fluid machinery body, which is disposed in the aforementioned mechanical chamber; a motor, which drives the aforementioned fluid machinery body disposed in the aforementioned mechanical chamber, and is equipped with a self-cooling fan for cooling the aforementioned motor itself; and a second communication portion that connects the aforementioned mechanical chamber and the aforementioned electrical chamber to each other.

[0019] In addition to the inverter's cooling fan, the motor's self-cooling fan can also cool the electrical compartment.

[0020] Invention Effects According to the present invention, the heat in the electrical chamber where the control base is configured can be reduced in encapsulated fluid machinery. Attached Figure Description

[0021] Figure 1 This is a perspective view of an encapsulated fluid machinery according to the first embodiment of the present invention.

[0022] Figure 2 yes Figure 1 The front view of the encapsulated fluid machinery with the right door panel removed.

[0023] Figure 3 yes Figure 1 A side sectional view of an encapsulated fluid machinery.

[0024] Figure 4 yes Figure 1 A front sectional view of a packaged fluid machinery.

[0025] Figure 5 yes Figure 1 A plan view of the encapsulated fluid machinery.

[0026] Figure 6 yes Figure 1 A rear-view perspective view of the interior of a packaged fluid machinery.

[0027] Figure 7 yes Figure 1 A front perspective view of the interior of a packaged fluid machinery.

[0028] Figure 8 This relates to the encapsulated fluid machinery of the second embodiment of the present invention. Figure 3 The same side sectional view.

[0029] Figure 9 This relates to the encapsulated fluid machinery of the second embodiment of the present invention. Figure 4 The same front sectional view. Detailed Implementation

[0030] (First Embodiment) If reference Figures 1 to 7 The enclosure 2 of the encapsulated fluid machinery 1 according to the first embodiment of the present invention is generally cuboid in shape, and includes a bottom wall 2a, a top wall 2b, a right door 2c and a left door 2d forming the front wall, a rear wall 2e, a right side wall 2f, and a left side wall 2g. The space inside the enclosure 2, defined by these walls, is divided into two spaces by a partition 3, specifically a mechanical room 4 and an electrical room 5. Furthermore, as will be described in detail later, an inverter cooling flow path piping 6 is provided behind the partition 3 inside the enclosure 2.

[0031] In this embodiment, the partition 3 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, which forms 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 its rear end is connected to the right end of the main wall 3a. The left side wall 3c is located to the left of the right side wall 3b, separated by a gap, and its rear end is connected to the left end of the main wall 3a. The main wall 3a, right side wall 3b, and left side wall 3c extend upward from the bottom wall 2a of the housing 2, terminating without reaching the top wall 2b of the housing 2. A top wall 3d is provided at the upper end of the main wall 3a, right side wall 3b, and left side wall 3c in a manner that blocks the space they enclose.

[0032] Inside the enclosure 2, there are mechanical room 4, electrical room 5, and inverter cooling flow path piping 6.

[0033] The mechanical compartment 4 is formed by the area outside the partition wall 3 within the space of the enclosure 2. The electrical compartment 5 is the space surrounded 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 2c (front wall) of the enclosure 2. As will be described in detail later, the inverter cooling flow path piping 6 is arranged in the mechanical compartment 4 behind the main wall 3a of the partition wall 3.

[0034] The machine room 4 is equipped with a fluid machinery body 10 and a motor 11 that drives the fluid machinery body 10.

[0035] In this embodiment, the fluid machinery body 10 is a multi-stage oil-free screw compressor that compresses air. The fluid machinery 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 2 is provided with a structure for drawing in intake air into the fluid machinery body 10, which functions as a compressor, and a structure for releasing exhaust air from the fluid machinery body 10.

[0036] The motor 11 is equipped with a self-cooling fan 11a for air cooling the motor 11 itself. The self-cooling fan 11a draws air from outside the housing 2 into the machine chamber 4 through the air intake 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 chamber 4 by the self-cooling fan 11a is discharged outside the housing 2 through the exhaust port 32 located on the top wall 2b of the housing 2.

[0037] In the electrical compartment 5, a control board 21 and an operation board 22 (which together constitute a control base) and a portion of an inverter 23 are arranged. Specifically, the inverter 23 includes a main body 23a, a cooling fan 23b, and cooling fins 23c, with only the main body 23a located in the electrical compartment 5.

[0038] The electrical compartment 5 is fluidly connected to the outside of the housing 2 via an air intake 33 located on the right door 2c (front wall) of the housing 2. The air intake 33 is positioned at a relatively lower position in the height direction of the electrical compartment 5, i.e., at the lower part of the electrical compartment 5, and is connected to the outside of the housing 2. Furthermore, the electrical compartment 5 is connected to the mechanical compartment 4 via a communication opening 34 located on the main wall 3a of the partition 3.

[0039] As described above, an inverter cooling flow path piping 6 is provided behind the partition wall 3 inside the enclosure 2. The inverter cooling flow path piping 6 includes: a horizontal pipe 6a extending laterally along the lowest part of the main wall 3a of the partition wall 3; and a vertical pipe 6b connected to the left side of the horizontal pipe 6a and extending vertically. The right end of the horizontal pipe 6a, which is the starting point of the inverter cooling flow path piping 6, is fluidly connected to an air intake 35 located on the right side wall 2f of the enclosure 2. On the other hand, the upper end of the vertical pipe 6b, which is the terminal point of the inverter cooling flow path piping 6, is fluidly connected to an exhaust port 36 located on the top wall 2b of the enclosure 2. Thus, the inverter cooling flow path piping 6 is connected to the outside of the enclosure 2 at both ends via the air intake 35 and the exhaust port 36.

[0040] Within the inverter cooling flow path 6c, defined by the inverter cooling flow path piping 6, a cooling fan 23b and cooling fins 23c for the inverter 23 are arranged. Specifically, the cooling fan 23b and cooling fins 23c are arranged within the longitudinal pipe 6b of the inverter cooling flow path piping 6. When the cooling fan 23b operates, air outside the housing 2 is drawn into the inverter cooling flow path 6c (the portion defined by the horizontal pipe 6a) through the intake port 35. The air drawn into the inverter cooling flow path 6c rises in the portion defined by the longitudinal pipe 6b and passes sequentially through the cooling fins 23c and the cooling fan 23b, finally being discharged outside the housing 2 through the exhaust port 36. Thus, an airflow from the intake port 35 to the exhaust port 36 is formed within the inverter cooling flow path piping 6.

[0041] The inverter cooling flow path 6c, located upstream of the cooling fan 23b, is connected to the electrical room 5 via a connection port 37 located on the main wall 3a of the partition 3. The connection port 37 is connected to the inverter cooling flow path piping 6 at a position away from the air intake 35 and the exhaust 36.

[0042] If the self-cooling fan 11a of motor 11 is activated, the air in electrical chamber 5 flows out to mechanical chamber 4 through connection port 34, and the air outside housing 2 flows into electrical chamber 5 through air intake port 33. Thus, electrical chamber 5 is ventilated or air-cooled.

[0043] If the cooling fan 23b of the inverter 23 is activated, air from outside the housing 2 is drawn into the inverter cooling flow path 6c from the air intake 35 and flows toward the exhaust port 36, cooling the inverter 23 with the help of the air cooling fins 23c.

[0044] Although the main body 23a of the control board 21, the operation board 22, and the inverter 23 is located in the electrical compartment 5, the cooling fan 23b and cooling fins 23c of the inverter 23 are not located in the electrical compartment 5, but are located in the inverter cooling flow path 6c. By arranging the cooling fan 23b and cooling fins 23c of the inverter 23 outside the electrical compartment 5, the heat inside the electrical compartment 5 can be reduced.

[0045] An air intake 33 is provided in the electrical compartment 5 to draw air in from outside the housing 2. Furthermore, the inverter cooling flow path 6c is connected to the electrical compartment 5 via a communication port 37, located upstream of the cooling fan 23b. Therefore, when the cooling fan 23b operates, air from outside the housing 2 is drawn into the electrical compartment 5 through the air intake 33, and the drawn-in air flows from the electrical compartment 5 to the inverter cooling flow path 6c via the communication port 37. In this way, the cooling fan 23b of the inverter 23, located outside the electrical compartment 5 in the inverter cooling flow path 6c, can ventilate or air-cool the electrical compartment 5 using air from outside the housing 2. Therefore, it is not necessary to install a separate fan other than the inverter 23's cooling fan 23b for ventilation of the electrical compartment 5, simplifying the structure of the encapsulated fluid machinery 1.

[0046] (Second Implementation) Reference Figure 8 and Figure 9 The encapsulated fluid machinery 1 according to the second embodiment of the present invention will be described. Unless otherwise specifically mentioned in the following description, the second embodiment is the same as the first embodiment.

[0047] In this embodiment, instead of the communication port 37 in the first embodiment (for example, refer to...), Figure 3 The inverter cooling flow path 6c is fluidly connected to the electrical compartment 5 upstream of the cooling fan 23b via a connecting pipe 24. The connecting pipe 24 is disposed along the rear of the main wall 3a of the partition 3. The connecting pipe 24 includes: a horizontal pipe 24a, one end of which is connected to the horizontal pipe 6a of the inverter cooling flow path piping 6 and extends laterally; and a vertical pipe 24b, which is connected to the other end of the horizontal pipe 24a and extends upward. The other end of the vertical pipe 24b is fluidly connected to a communication port 38 disposed at the upper part of the main wall 3a of the partition 3.

[0048] Regarding the configuration of the connection port 38, "upper" means at least above the cooling fan 23b of the inverter 23, preferably near the uppermost part of the electrical compartment 5.

[0049] By providing the connecting pipe 24, the airflow from the electrical compartment 5 to the inverter cooling flow path 6c becomes smoother, and when the cooling fan 23b of the inverter 23 operates, the intake of air from outside the housing 2 into the electrical compartment 5 via the intake port 33 becomes smoother. In other words, by providing the connecting pipe 24, cooling air can be delivered to the electrical compartment 5 more smoothly. Furthermore, by providing the connecting pipe 24, the thermal impact on the air drawn in by the cooling fan 23b of the inverter 23 from the equipment housed in the electrical compartment 5, namely the control board 21, the operation board 22, and the main body 23a of the inverter 23, can be reduced.

[0050] By fluidly connecting the connecting pipe 24 to the upper part of the electrical room 5, it is easy to draw out the warm air that tends to concentrate in the upper part of the electrical room 5 from the connecting pipe 24.

[0051] Furthermore, it is preferable to fluidly connect the connecting pipe 24 to the upper part of the electrical chamber 5 and to configure the air intake 33 to communicate with the lower part of the electrical chamber 5. By doing so, the warmed air in the upper part of the electrical chamber 5 flows from the electrical chamber 5 through the connection port 38 to the inverter cooling flow path 6, thus promoting ventilation in the electrical chamber 5.

[0052] By providing a connecting port 38 at the top for air to flow from the electrical compartment 5 to the connecting pipe 24, as described above, the connecting port 38 is not opposite to the air intake 33 (located at the lower part of the right door 2c of the housing 2) for drawing air from outside the housing 2 into the electrical compartment 5. Because the air intake 33 and the connecting port 38 are not opposite each other, the air flow path within the electrical compartment 5 is extended compared to the case where the air intake 33 and the connecting port 38 are opposite each other. Therefore, a larger area of ​​the electrical compartment can be supplied with air drawn from outside the housing through the air intake 33.

[0053] Explanation of reference numerals in the attached figures 1. Encapsulated fluid machinery 2. Enclosure 2a Bottom wall 2b Top Wall 2c Right door 2d Left door leaf 2e Rear wall 2f Right side wall 2g left side wall 3. Next door 3a Main wall 3b Right side wall 3c Left side wall 3D ceiling 4. Machine Room 5 Electrical Room 6. Inverter cooling flow path piping 6a Horizontal pipe 6b Longitudinal Pipe 6c Inverter Cooling Flow Path 10. Fluid Machinery Body 11 motors 11a Self-cooling fan 21 Control board 22 Operation base 23 Inverter 23a Equipment body 23b Cooling fan 23c Cooling fins 24 Connecting pipes 24a Horizontal pipe 24b Longitudinal Pipe 31. Intake port 32 Exhaust Port 33 Intake port 34 Connecting ports 35 Intake port 36 Exhaust ports 37 Connecting Port 38 Connecting ports.

Claims

1. An encapsulated fluid machinery, characterized in that, have: Box; The electrical room is located inside the aforementioned enclosure and has a first opening that communicates with the outside of the enclosure. The inverter cooling path is located outside the aforementioned electrical room; The control panel is located in the aforementioned electrical room; An inverter is an inverter comprising a main body, a cooling fan, and cooling fins. The main body is located in the aforementioned electrical compartment, and the cooling fan and cooling fins are located in the inverter's cooling flow path. The first connecting part connects the aforementioned inverter cooling flow path upstream of the aforementioned cooling fan to the aforementioned electrical room.

2. An encapsulated fluid machinery, comprising: Box; The electrical room is located inside the aforementioned enclosure and has a first opening that communicates with the outside of the enclosure. The inverter cooling path is located outside the aforementioned electrical room within the aforementioned enclosure; The control baseboard is located in the aforementioned electrical room; and An inverter is an inverter that includes a main body, a cooling fan, and cooling fins. The main body is located in the electrical room, and the cooling fan and cooling fins are located in the inverter cooling flow path. Its features are, The aforementioned inverter cooling flow path includes: The air intake and exhaust ports are connected to the outside of the aforementioned housing at both ends of the inverter cooling flow path; and The first connecting part is provided away from the aforementioned air intake and the aforementioned air exhaust, so that the aforementioned inverter cooling flow path is connected to the aforementioned electrical room upstream of the aforementioned cooling fan.

3. The encapsulated fluid machinery as described in claim 1 or 2, characterized in that, The aforementioned first connecting portion is an opening provided in the wall that separates the aforementioned electrical chamber from the aforementioned inverter cooling flow path.

4. The encapsulated fluid machinery as described in claim 1 or 2, characterized in that, The aforementioned first connecting portion includes a connecting pipe that fluidly connects the aforementioned inverter cooling flow path to the aforementioned electrical compartment.

5. The encapsulated fluid machinery as described in claim 4, characterized in that, The aforementioned connecting pipe is connected to the second opening located at the top of the aforementioned electrical room.

6. The encapsulated fluid machinery as described in claim 5, characterized in that, The aforementioned first opening and the aforementioned second opening are arranged in a manner that they are not opposite to each other.

7. The encapsulated fluid machinery as described in claim 1 or 2, characterized in that, It also has: The mechanical room is located within the aforementioned enclosure and is separated from the aforementioned electrical room; The main body of the fluid machinery is located in the aforementioned machinery chamber; The motor is a motor that drives the aforementioned fluid machinery body disposed in the aforementioned machine room, and includes a self-cooling fan for cooling the motor itself; and The second connecting part connects the aforementioned mechanical room and the aforementioned electrical room.

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