Blower

Abstract

The present invention relates to a blower. The blower includes a box body, an electric motor (1), a compression unit (6), and a compressor unit (14). An installation cavity is formed inside the box body, and the electric motor (1), the control unit (6), and the compression unit (14) are arranged in the installation cavity. A first air inlet (8) and a second air inlet (9) penetrating the side wall of the box body are formed on the side wall of the box body. The control unit communicates with the outside through the first air inlet (8), the electric motor communicates with the outside through the second air inlet, and the compression unit is configured to compress the gas in the installation cavity.

Description

Technical Field

[0001] (Cross - reference to Related Applications) This application claims priority to Chinese Application No. 202210564771.8, filed on May 23, 2022, "Air Blower", and Chinese Application No. 202221252128.3, filed on May 23, 2022, "Air Blower", and the entire disclosure content thereof is incorporated herein by reference.

[0002] (Technical Field) The present invention relates to the field of air blowers, and specifically to air blowers.

Background Art

[0003] According to the prior art, a single - stage screw - type air blower has a complex structure, is strictly compartmentalized in the functional area, and includes a compressed gas inlet and flow path, a cooling air inlet for the motor and electrical cabinet, an air inlet for the oil cooling fan, an outside air inlet for the whole machine, a high - temperature air outlet for the whole machine, etc. Such a structure can guarantee the maximum energy efficiency, but since the opening degree of the grid for the air inlet and air outlet becomes large, it is difficult to effectively use the space. Due to this, the noise of the operating machine easily leaks out, so space is required to reduce the noise, but the noise reduction effect is still not satisfactory.

[0004] In addition, the conventional air blower requires a separate air inlet flow path entering the compressor element, which also generates a large amount of noise. Also, the design of the separate air outlet flow path increases the environmental temperature and pollutes the environment.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The present invention aims to solve at least one of the above - mentioned technical problems in the prior art. Therefore, the present invention refers to proposing an air blower that can reduce the number of openings in the case.

Means for Solving the Problem

[0006] The blower according to an embodiment of the present invention includes a case in which a chamber is formed inside the case, and a first air inlet and a second air inlet that separately penetrate the case side wall of the case are installed on the case side wall; a control unit installed inside the chamber and applicable to communicate with the outside through the first air inlet; a motor installed inside the chamber, the control unit is at least applicable to control and operate the motor, and the motor is applicable to communicate with the outside through the second air inlet; and a compression unit, the motor is applicable to drive and operate the compression unit, and the compression unit is applicable to compress the air inside the chamber.

[0007] According to the blower according to an embodiment of the present invention, the first air inlet and the second air inlet are installed on the case side wall of the case. As a result, the number of openings is quite small, which facilitates reducing the noise coming out of the inside of the case.

[0008] According to some embodiments of the present invention, the case side wall includes a first end plate and a second end plate installed opposite to each other. The first air inlet is installed on the first end plate, and the second air inlet is installed on the second end plate.

[0009] According to some embodiments of the present invention, the control fan is installed on the side facing the control unit of the first air inlet.

[0010] According to some embodiments of the present invention, the control unit further has a heat dissipation opening communicating with the chamber, and the heat dissipation opening is located on the side facing outward from the first air inlet of the control unit.

[0011] According to some embodiments of the present invention, the blower is applicable to perform air cooling for the motor, and further includes a motor fan installed between the motor and the second air inlet. The axis of the motor fan and the axis of the motor are coaxial, and the axis of the motor fan is offset with respect to the center of the second air inlet.

[0012] According to some embodiments of the present invention, a fan cover is installed between the motor fan and the second air inlet, and an air inlet flow path is formed in the fan cover.

[0013] According to some embodiments of the present invention, the blower is located below the motor and further includes an oil tank for supporting the motor.

[0014] According to some embodiments of the present invention, the blower further includes a gas filter connected to the compression unit. The gas filter is applicable to suck the gas in the chamber and send the filtered gas to the compression unit for compression.

[0015] According to some embodiments of the present invention, a soundproof panel is installed between the gas filter and the case side wall.

[0016] According to some embodiments of the present invention, a compressed gas outlet penetrating the case side wall is installed on the case side wall of the case. The compressed gas outlet of the compression unit communicates with the compressed gas outlet, and the blower further includes a muffler installed between the compressed gas outlet of the compression unit and the compressed gas outlet.

[0017] According to some embodiments of the present invention, the motor is applicable to drive the compression unit to operate through a transmission system. The blower further includes an oil cooler applicable to cool the lubricating oil passing through the transmission system, and an oil cooling fan applicable to perform air cooling for the oil cooler. A third air inlet penetrating the case side wall is installed on the case side wall of the case, and the oil cooling fan communicates with the outside through the third air inlet.

[0018] According to some embodiments of the present invention, the case includes a ceiling, a bottom plate, a first side plate and a second side plate installed opposite to each other, and a first end plate and a second end plate installed opposite to each other. The first side plate, the first end plate, the second side plate, and the second end plate are arranged in sequence. The ceiling covers the upper parts of the first side plate, the first end plate, the second side plate, and the second end plate. The bottom plate covers the lower parts of the first side plate, the first end plate, the second side plate, and the second end plate. The first air inlet is installed on the first end plate, and the second air inlet and the third air inlet are installed on the second end plate.

[0019] According to some embodiments of the present invention, the control unit includes an electric cabinet and a control panel electrically connected to the electric cabinet. The first end plate includes a first end plate body and a first end part door plate. The first end plate body is adjacent to the second side plate, and the first end part door plate is adjacent to the first side plate. The electric cabinet is installed on the side facing the chamber of the first end part door plate. The first air inlet is installed on the first end part door plate. Also, an installation opening is installed on the first end part door plate, and the control panel is installed outside through this installation opening.

[0020] According to some embodiments of the present invention, both the motor and the compression unit are arranged on the side facing the chamber of the first end plate body.

[0021] According to some embodiments of the present invention, the first side plate includes a first front side door adjacent to the first end plate and a first rear side door adjacent to the second end plate. The compression unit is arranged on the side facing the chamber of the first front side door, and the motor is arranged on the side facing the chamber of the first rear side door.

[0022] According to some embodiments of the present invention, the compressed gas outlet is installed on the second end plate, and the compressed gas outlet of the compression unit communicates with the compressed gas outlet.

[0023] According to some embodiments of the present invention, all of the first air inlet, the second air inlet, and the third air inlet are provided with air inlet grids for each.

[0024] According to some embodiments of the present invention, the blower is applicable to perform air cooling for the motor, further includes a motor fan installed between the motor and the second air inlet, and the control fan is installed on the side facing the control unit of the first air inlet.

[0025] Further aspects and advantages of the present invention will become partially apparent from the following description or can be understood through the practice of the present invention.

Brief Description of the Drawings

[0026]

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Fig. 11

Modes for Carrying Out the Invention

[0027] Embodiments of the present invention will be described in detail below. Examples of the embodiments are disclosed in the drawings, and through the drawings, the same or similar reference numerals indicate the same or similar elements, or elements having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and for explaining the present invention, but cannot be construed as limiting the present invention.

[0028] In the description of the present invention, the directions or positional relationships indicated by terms such as "vertical", "horizontal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "upper part", "lower part", "inside", "outside", etc. are understood as being shown based on the drawings. This is to facilitate the description of the present invention and simplify the description, and does not indicate or imply that the device or element mentioned needs to have a specific orientation, be configured in a specific orientation, and operate. Therefore, it cannot be construed as limiting the present invention.

[0029] Furthermore, the terms "first" and "second" are used only for the purpose of description and cannot be construed as indicating or suggesting relative importance or implicitly indicating the number of the technical features mentioned. Therefore, the features defined by "first" and "second" can clearly or implicitly include one or more of these features. In the description of the present invention, "a plurality of" means at least two, for example, two, three, etc., unless clearly and specifically defined.

[0030] In the present invention, unless clearly defined and specified, terms such as "install", "interconnect", "connect", "fix", etc. should be interpreted broadly. For example, this can mean fixedly connecting, detachably connecting, or integrally forming; this can mean mechanically connecting, electrically connecting, or being in communication with each other; this can mean directly interconnecting, indirectly interconnecting through an intermediate medium, communicating inside two elements, or interacting between two elements. For those skilled in the art, the specific meaning of the above terms in the present invention can be interpreted according to specific cases.

[0031] Hereinafter, the blower according to the present invention will be described in detail in relation to FIGS. 1-11.

[0032] Referring to FIGS. 1-2, 4 and 8, the blower according to the present invention can include a case, a control unit 6, a motor 1 and a compression unit 14.

[0033] Referring to FIGS. 2-4, a chamber is formed in the case, and a first air inlet 8 and a second air inlet 9 are installed on the case side wall of the case. The first air inlet 8 and the second air inlet 9 penetrate the side wall of the case separately, that is, the inside of the case communicates with the outside of the case through the first air inlet 8 and the second air inlet 9, and the outside air can enter the chamber in the case through the first air inlet 8 and the second air inlet 9.

[0034] In some embodiments of the present invention, referring to FIGS. 1-2 and 5-6, the control unit 6 can include an electrical cabinet 61 and a control panel 62. Electrical components such as inverters are arranged inside the electrical cabinet 61. The control panel 62 is coupled to the electrical cabinet 61. In order to monitor various operating parameters of the blower, the monitoring system can be integrated inside the control unit 6. For example, the monitoring system can include warning information, maintenance plans, and an online visible display of the machine state.

[0035] Referring to FIGS. 1-4, the control unit 6 is disposed inside the chamber. The control unit 6 communicates with the outside (outside the case) via the first air inlet 8 on the electric cabinet 61, and the control unit 6 can be applied to control at least the operation of the motor 1. In some embodiments, the user can set the relevant parameters of the control unit 6 that can control the motor 1 by means of the control panel 62. Further, the control unit 6 can dissipate heat via the first air inlet 8 to prevent the control unit 6 from being damaged by an overly high operating temperature.

[0036] Referring to FIGS. 1 and 3-4, the motor 1 communicates with the outside via the second air inlet 9. The motor fan 2 is used to air-cool the motor 1. When the motor fan 2 is operating, outside air can be guided to the motor 1 via the second air inlet 9 to dissipate heat, which prevents the motor 1 from being damaged due to an overly high operating temperature.

[0037] Referring to FIGS. 4-5, the compression unit 14 is installed in the chamber. The motor 1 is suitable for driving and operating the compression unit 14, and the compression unit 14 is suitable for compressing the gas in the chamber.

[0038] According to the blower of the embodiment of the present invention, the first air inlet 8 and the second air inlet 9 are installed on the case side wall of the case, and no other air inlets and air outlets are provided. For example, no openings for cooling air suction and no other openings for discharging high-temperature air are provided. Reducing the number of openings helps reduce the transmission of noise from the inside of the case to the outside. On the other hand, the arrangement is simplified, which helps reduce the installation and future maintenance costs and ensures the stable operation of the blower at a low temperature.

[0039] In some embodiments of the present invention, in relation to FIGS. 1, 6 and 11, the case sidewall includes a first end plate 71 and a second end plate 72 which are installed opposite to each other. The first air inlet 8 is installed on the first end plate 71, and the second air inlet 9 is installed on the second end plate 72. In this way, the first air inlet 8 and the second air inlet 9 are installed facing each other, which reduces mutual interference, so the cooling effect at both ends is not hindered. Furthermore, the centers of the first air inlet 8 and the second air inlet 9 are not on the same line, which helps to dissipate the heat of the motor 1 and the control unit 6, and enables the cooling air and the high-temperature air at both ends of the blower to flow in different spaces.

[0040] In some embodiments of the present invention, the first air inlet 8 and the control unit 6 directly face each other, and the control fan is installed on the side facing the control unit 6 of the first air inlet 8. When the control fan is operating, the outside air can be guided to the control unit 6 through the first air inlet 8 so as to dissipate the heat of the control unit 6. By providing the control fan, the circulating speed of the air in the control unit 6 can be increased, so more ambient heat can be taken away, which reduces the operating temperature of the control unit 6 (mainly including electrical components such as inverters).

[0041] In some embodiments, the control fan can be integrated with a filter such as air filter cotton so as to filter the air entering from the first air inlet 8, thereby ensuring that the air flowing into the inverter and other electrical components of the control unit 6 for cooling does not contain particulate contaminants and helps to extend the service life of the inverter and other electrical components.

[0042] In some embodiments of the present invention, referring to FIGS. 1 and 3, the control unit 6 further has a heat dissipation opening 11 communicating with the chamber. Thus, the heat generated by the control unit 6 during operation can enter the chamber through the heat dissipation opening 11. The air entering from the first air inlet 8 blows directly towards the control unit 6 to carry away the heat of the control unit 6, and the heat is adapted to enter the chamber through the heat dissipation opening 11. Referring to FIGS. 3 and 10, the heat dissipation opening 11 is disposed near the upper part of the electric cabinet 61. Since the air with the heat of the control unit 6 is hot and light, providing the heat dissipation opening 11 at a position close to the upper part of the electric cabinet 61 helps the hot air in the electric cabinet 61 to flow upward so as to enter the chamber from the heat dissipation opening 11.

[0043] The heat dissipation opening 11 is located on the side facing outward from the first air inlet 8 of the control unit 6. Accordingly, the heat dissipation opening 11 does not directly face the first air inlet 8, thereby preventing the heat dissipation opening 11 from being directly blown by the air entering from the first air inlet 8 and affecting the heat discharged from the inside of the control unit 6 to the chamber.

[0044] In some embodiments of the present invention, referring to FIGS. 3-5 and FIGS. 10-11, the blower further includes a motor fan 2 installed in the chamber and used for air cooling of the motor 1. When the motor fan 2 is operating, the outside air can be quickly guided to the motor 1 through the second air inlet 9, so that the heat of the motor 1 can be dissipated more quickly, which prevents the motor 1 from being damaged due to an overly high operating temperature. The axis of the motor fan 2 and the axis of the motor 1 are arranged coaxially.

[0045] In some embodiments, referring to FIGS. 10-11, the axis of the motor fan 2 is offset with respect to the center of the second air inlet 9. Thus, the path between the second air inlet 9 and the motor fan 2 is serpentine, thereby reducing the noise at the second air inlet 9.

[0046] In a further embodiment of the present invention, as shown in FIGS. 3-5, the second air inlet 9 faces directly the motor fan 2. When the motor fan 2 is operating, outside air can be led into the chamber through the second air inlet 9 to cool the components within the chamber. Since the air circulation speed within the chamber can be increased when the motor fan 2 is operating, more heat within the chamber can be removed, and the operating temperature of the blower becomes lower.

[0047] In some embodiments of the present invention, the motor cover is installed between the motor fan 2 and the second air inlet 9, and the motor cover forms a flow path for the intake air. In this way, the operating efficiency of the motor fan 2 can be improved, and the vortex generated by the operation of the motor fan 2 acts directly on the second air inlet 9, so as to accelerate the air circulation of the second air inlet 9. When the heat dissipation requirement increases, the air intake of the motor fan 2 increases according to the actual heat dissipation requirement.

[0048] In some embodiments of the present invention, the motor 1 is suitable for driving and operating the compression unit 14 by a transmission system. In some embodiments, the transmission system can be a gear mechanism having high driving efficiency. In some embodiments, the transmission mechanism can also be a belt drive mechanism.

[0049] In some embodiments of the present invention, the axis of the motor 1 and the axis of the transmission system can be installed horizontally, which brings about simple arrangement, low maintenance cost, and higher driving stability. In other embodiments, the axis of the motor 1 and the axis of the transmission system can also be installed non-horizontally to increase the drive ratio and the amount of compressed air.

[0050] The blower also includes an oil cooler 3 and an oil cooling fan 4. The oil cooler 3 is used to cool the lubricating oil passing through the transmission system in order to remove part of the heat of the transmission system, which prevents the transmission system from operating at a high temperature for a long time. Further, since the lubricating oil lubricates the transmission system and reduces the wear of the transmission system, the service life of the transmission system can be extended. The oil cooling fan 4 is used to air-cool the oil cooler 3 so as to remove the excess heat of the oil cooler 3. When the oil cooling fan 4 is operating, the air circulation speed of the oil cooler 3 can be increased, and more heat surrounding the oil cooler 3 can be removed to reduce the operating temperature of the oil cooler 3. The third air inlet 10 is installed on the side wall of the case. The third air inlet 10 penetrates the side wall of the case, that is, the inside of the case communicates with the outside of the case through the third air inlet 10. The oil cooling fan 4 can be applied to communicate with the outside through the third air inlet 10, and the outside air can reach the oil cooling fan 4 through the third air inlet 10 and flow into the chamber in the case. Specifically, when the oil cooling fan 4 is operating, the outside air can be guided to the oil cooler 3 through the third air inlet 10, so that the heat of the oil cooler 3 is dissipated, and the cooling effect on the lubricating oil is prevented from being affected by the excessively high operating temperature of the oil cooler 3.

[0051] Alternatively, the third air inlet 10 faces the oil cooling fan 4 directly. In this way, the vortex generated by the operation of the oil cooling fan 4 directly acts on the third air inlet 10 to accelerate the air circulation of the third air inlet 10. Further, the outside air will later flow into the chamber from the fins of the oil cooler 3 to dissipate the heat of the components in the chamber.

[0052] In some embodiments of the present invention, the blower can also include an oil tank 15 positioned below the motor 1. A shock absorption pad (not shown) is installed between the oil tank 15 and the motor 1, and the motor 1 is attached onto the oil tank 15 by fasteners such as bolts or rivets. The oil tank 15 can support the motor 1 without providing a separate motor support sheet.

[0053] In some embodiments of the present invention, the blower can also include an oil pump, which is integrated onto the compression unit 14 and can be applied to cause a circulating flow of lubricating oil fluid from the oil tank 15 to the transmission system.

[0054] In some alternative embodiments, the third air inlet 10 and the second air inlet 9 can be integrated as one air inlet.

[0055] In some embodiments of the present invention, referring to FIG. 3, the blower can also include a gas filter 12 connected to the compression unit 14. The gas filter 12 can be applied to suck the high-temperature gas in the chamber and send the filtered high-temperature gas to the compression unit 14 for compression. Thereby, it is guaranteed that pure gas enters the compression unit 14, and the compression unit 14 is prevented from being damaged due to impurities entering the compression unit 14. The gas in the chamber can enter the compression unit 14 after passing through the gas filter 12 for compression, and the compression unit 14 does not require another air inlet flow path.

[0056] In some embodiments of the present invention, the soundproof panel 13 is installed between the gas filter 12 and the case sidewall. As shown in FIG. 9, the soundproof panel 13 can include a sound-absorbing sponge 133 and a sheet metal bracket 134. The thickness of the sound-absorbing sponge 133 can be from 20 mm to 40 mm, for example, 30 mm. The surface of the sound-absorbing sponge 133 is covered with a PU film, and the sound absorption rate of the sound-absorbing sponge 133 can exceed 90% at most in the high-frequency range. The sound-absorbing sponge faces the gas filter 12, that is, the sound-absorbing sponge 133 is arranged facing the gas filter 12 on the side surface of the sheet metal bracket 134 to absorb and buffer the sound waves radiated thereto. The sheet metal bracket 134 is fixed beside the gas filter 12 and is adapted to reflect the sound waves passing through the sound-absorbing sponge 133 to prevent the sound wave energy from being radiated outside the case as much as possible.

[0057] Referring to FIGS. 3-5, two sound-absorbing sponges 13 can exist. The two sound-absorbing sponges 13 are the first baffle 131 and the second baffle 132 respectively. The first baffle 131 is located on the front side of the blower, and the second baffle 132 is located on the left side of the blower. The sound-absorbing sponge 13 can reduce the amount of noise coming out from the gas filter 12 to the outside and further reduce the noise of the blower.

[0058] In some embodiments of the present invention, referring to FIGS. 3-4, FIG. 7, and FIGS. 10-11, a compressed gas outlet 19 is installed on the sidewall of the case. The compressed gas outlet 19 penetrates the case sidewall, and the compressed gas outlet compressed by the compression unit 14 is suitable for communicating with the compressed gas outlet 19. In actual applications, the compressed gas outlet 19 can be applied to be coupled with the pipeline of other devices, and other devices can use the compressed air generated by the blower. That is, the motor 1 supplies power to the compression unit 14, and the gas compressed by the compression unit 14 flows out from the compressed gas outlet 19 for use by other devices.

[0059] In some embodiments of the present invention, referring to FIGS. 3-5, the blower can also include a silencer 5 installed between the compressed gas outlet of the compression unit 14 and the compressed gas outlet 19. The silencer 5 can be applied to eliminate the compressed gas noise coming out from the compressed gas outlet of the compression unit in order to further reduce the noise of the blower.

[0060] In some embodiments of the present invention, referring to FIGS. 6-7, the case can include a ceiling 16, a bottom plate, a first side plate 17 and a second side plate 18 installed opposite to each other, and a first end plate 71 and a second end plate 72 installed opposite to each other. The first side plate 17, the first end plate 71, the second side plate 18, and the second end plate 72 are arranged in sequence. The ceiling 16 covers the upper parts of the first side plate 17, the first end plate 71, the second side plate 18, and the second end plate 72. The bottom plate covers the bottom parts of the first side plate 17, the first end plate 71, the second side plate 18, and the second end plate 72. The first air inlet 8 is installed on the first end plate 71, and the second air inlet 9 and the third air inlet 10 are installed on the second end plate 72.

[0061] The second side plate 18 is located on the left side of the blower, the first side plate 17 is located on the right side of the blower, the first end plate 71 is located at the front end of the blower, and the second end plate 72 is located at the rear end of the blower. The first side plate 17, the first end plate 71, the second side plate 18, and the second end plate 72 can be made into detachable flat plates, and by detaching them, the components on the back side of the corresponding side plates can be easily maintained.

[0062] The first end plate 71 can include a first end plate body 712 and a first end door plate 711. The first end plate body 712 is adjacent to the second side plate 18, and the first end door plate 711 is adjacent to the first side plate 17. The electric cabinet 61 is installed on the side facing the chamber of the first end door plate 711. In other words, the electric cabinet 61 is located on the right side of the blower, and the electric cabinet 61 is located directly behind the first end door plate 711. Therefore, by opening the first end door plate 711, the repair and maintenance of the electric cabinet 61 on the back side of the first end door plate 711 can be performed. The first air inlet 8 is installed on the first end door plate 711, and an installation opening is installed on the first end door plate 711. Through this installation opening, the control panel 62 is installed outside, which is convenient for the user to operate the control panel 62. That is, the user can perform related operations on the control panel 62 outside the case.

[0063] In some embodiments of the present invention, all of the motor 1, the motor fan 2, and the compression unit 14 are arranged on the side facing the chamber of the first end plate body 712. That is, all of the motor 1, the motor fan 2, and the compression unit 14 are arranged on the left side of the blower.

[0064] In some embodiments of the present invention, the first side plate 17 can include a first front door 171 and a first rear door 172. The first front door 171 is located in front of the first rear door 172. The first front door is adjacent to the first end plate 71, and the first rear door 172 is adjacent to the second end plate 72. The compression unit 14 is located on the side facing the chamber of the first front door 171, and the motor 1 and the motor fan 2 are located on the side facing the chamber of the first rear door 172. That is, the compression unit 14 is located in front of the blower, and the motor 1 and the motor fan 2 are located behind the blower.

[0065] In some embodiments of the present invention, the second side plate 18 can include a second front side door 181 and a second rear side door 182. The second front side door 181 is located in front of the second rear side door 182. The second front side door 181 is adjacent to the first end plate 71, and the second rear side door 182 is adjacent to the second end plate 72.

[0066] In some embodiments of the present invention, the compressed air outlet 19 is installed on the second end plate 72, that is, the compressed air outlet 19 is located on the rear side of the blower. Therefore, the blower has a better appearance, and the compressed gas outlet 19 is connected to other devices from the back side of the blower. When the pipeline leaks, the leaked gas generated at the compressed gas outlet 19 can be prevented from being directly blown onto the users in the front, left, or right side, which facilitates improving the use safety of the blower.

[0067] In some embodiments of the present invention, air inlet grids are installed for each of the first air inlet 8, the second air inlet 9, and the third air inlet 10. By providing the air inlet grids, the first air inlet 8, the second air inlet 9, and the third air inlet 10 can be protected, and it can be prevented that the user hits the components inside the case through the first air inlet 8, the second air inlet 9, and the third air inlet 10, thereby guaranteeing the use safety of the blower. On the other hand, since the number of openings is small, the number of air inlet grids can be reduced, and the man-hours for assembling the air inlet grids and the case can be reduced.

[0068] In some embodiments of the present invention, the blower further includes a motor fan 2 that can be applied to perform air cooling for the motor 1, and the motor fan 2 is installed between the motor 1 and the second air inlet 9. When the motor fan 2 is operating, outside air can be quickly guided to the motor 1 through the second air inlet 9 in order to dissipate the heat of the motor 1 more quickly and prevent the motor 1 from being damaged due to an overly high operating temperature. The axis of the motor fan 2 and the axis of the motor 1 are arranged coaxially. The control fan is installed on the side facing the control unit 6 of the first air inlet 8. When the control fan is operating, outside air can be guided to the control unit 6 through the first air inlet 8 so as to dissipate the heat of the control unit 6. By providing the control fan, the air circulation speed in the control unit 6 can be increased so as to carry away more heat surrounding the control unit 6, thereby reducing the operating temperature of the control unit 6 (mainly electrical components such as inverters).

[0069] The operating status of the blower according to one embodiment of the present invention will be described in general as follows.

[0070] The motor fan 2 installed coaxially with the motor 1 obtains low-temperature outside air through the second air inlet 9. After the low-temperature air absorbs the heat of the motor 1, the low-temperature air becomes high-temperature air after cooling the motor 1 and then stays in the chamber because there are no openings installed on the first side plate 17 and the ceiling 16 and they are designed to be closed.

[0071] The control unit 6 takes in outside air through the first air inlet 8 on the first end plate 71 in order to dissipate the heat of the inverter and electronic elements. Then, the high-temperature air is exhausted into the chamber through the heat dissipation opening 11.

[0072] The oil cooling fan 4 at the front end of the oil cooler 3 takes in air from the third air inlet 10. After taking away the heat of the lubricating oil that is oil-cooled, the high-temperature air also enters the chamber.

[0073] The high-temperature air is directly sucked by the gas filter 12. Based on experiments, the temperature of the air entering the gas filter 12 is 8°C to 10°C higher than the outside air. After the impurities are filtered, the air enters the compression unit 14 and is compressed. Then, the pressure fluctuation level is reduced by the muffler 5, and finally, the compressed air is conveyed to other systems through the compressed gas outlet 19. The first baffle 131 and the second baffle 132 are installed around the gas filter 12 in a direction close to the first side plate 17, which helps reduce the noise of the sound source.

[0074] The arrangement of the blower according to the embodiment of the present invention can maintain the expected flow rate level and energy efficiency, and can reduce the amplitude of the machine noise by 8 to 9 dB(A). According to the calculation of the machine intake, the air volume required for air compression can be satisfied by the intake air volumes of the first air inlet 8 and the second air inlet 9, and the situation of back pressure (which causes the motor and lubricating oil not to be sufficiently cooled) does not occur. After adding the third air inlet 10, the intake air volume can be further satisfied, and the possibility of the occurrence of the back pressure state is reduced. Except for a slight exposure of the air inlet grid, the case is integrally sealed, which helps reduce the sound radiated outside the case during the operation of the blower. The blower has a compact structure and higher integrity. When the blower is used in the normal state, there is no need to equip an additional waterproof / dustproof cover.

[0075] According to the embodiment of the present invention, the blower case only holds three air inlets (i.e., the first air inlet 8, the second air inlet 9, and the third air inlet 10), thereby eliminating the air inlet flow path for separate compressed air and the high-temperature air outlet of the machine.

[0076] In the description of this specification, references such as "one embodiment", "some embodiments", "examples", "specific examples", "some examples", etc. mean that the specific features, structures, materials, or characteristics described in relation to this embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Further, the specific features, structures, materials, or characteristics described can be appropriately combined in any one or two or more embodiments or examples. Furthermore, those skilled in the art can associate or combine different embodiments or examples described in this specification.

[0077] Although embodiments of the present invention have been shown and described, as can be understood, the above embodiments are illustrative and do not limit the present invention. Modifications, corrections, alternatives, and variations of the above embodiments by those skilled in the art are within the scope of the present invention.

Explanation of Reference Signs

[0078] 1 Motor 2 Motor Fan 3 Oil Cooler 4 Oil Cooling Fan 5 Silencer 6 Control Unit 61 Electrical Cabinet 62 Control Panel 71 First End Plate 711 First End Door Plate 712 First End Plate Body 72 Second End Plate 8 First Air Inlet 9 Second Air Inlet 10 Third Air Inlet 11 Heat Dissipation Opening 12 Gas Filter 13 Soundproof Panel 131 First Baffle 132 Second Baffle 133 Sound Absorbing Sponge 134 Sheet Metal Bracket 14 Compression unit 15 Oil tank 16 Ceiling 17 First side plate 171 First front door 172 First rear door 18 Second side plate 181 Second front door 182 Second rear door 19 Compressed gas outlet

Claims

1. A blower including a case, a motor (1), a control unit (6), and a compression unit (14), wherein a chamber is formed within the case, and the motor (1), the control unit (6), and the compression unit (14) are installed within the chamber. A first air inlet (8) and a second air inlet (9) that separately penetrate the case side wall are installed on the case side wall of the case. The control unit (6) communicates with the outside through the first air inlet (8), the motor (1) communicates with the outside through the second air inlet (9), and the compression unit (14) is applicable to compress the air inside the chamber. Blower.

2. The case side wall includes a first end plate (71) and a second end plate (72) installed opposite to each other. The first air inlet (8) is installed on the first end plate (71), and the second air inlet (9) is installed on the second end plate (72). The blower according to claim 1.

3. A control fan is installed on the side of the first air inlet (8) facing the control unit (6). The blower according to claim 1 or 2.

4. The control unit (6) further has a heat dissipation opening (11) communicating with the chamber, and the heat dissipation opening (11) is located on the side facing outward from the first air inlet (8) of the control unit (6). The blower according to any one of claims 1 to 3.

5. The blower is applicable to perform air cooling on the motor (1), and further includes a motor fan (2) installed between the motor (1) and the second air inlet (9). The axis of the motor fan (2) and the axis of the motor (1) are coaxial, and the axis of the motor fan (2) is offset with respect to the center of the second air inlet (9). The blower according to any one of claims 1 to 4.

6. A fan cover is installed between the motor fan (2) and the second air inlet (9), and an air inlet flow path is formed within the fan cover. The blower according to claim 5.

7. The blower further includes an oil tank (15) located below the motor (1) and supporting the motor (1). The blower according to any one of claims 1 to 6.

8. The blower further includes a gas filter (12) connected to the compression unit (14), and the gas filter (12) is applicable to suck the gas in the chamber and send the filtered gas to the compression unit (14) for compression. The blower according to any one of claims 1 to 7.

9. The blower according to claim 8, wherein a soundproof panel (13) is installed between the gas filter (12) and the case side wall.

10. A compressed gas outlet (19) penetrating the case side wall is installed on the case side wall of the case, and the compressed gas outlet of the compression unit (14) communicates with the compressed gas outlet (19). The blower further includes a silencer (5) installed between the compressed gas outlet of the compression unit (14) and the compressed gas outlet (19). The blower according to any one of claims 1 to 9.

11. The motor (1) is applicable to drive and operate the compression unit (14) by a transmission system. The blower further includes an oil cooler (3) applicable to cool the lubricating oil passing through the transmission system, and an oil cooling fan (4) applicable to perform air cooling on the oil cooler (3). A third air inlet (10) penetrating the case side wall is installed on the case side wall of the case, and the oil cooling fan (4) communicates with the outside through the third air inlet (10). The blower according to claim 1 or 2.

12. The case includes a ceiling (16), a bottom plate, a first side plate (17) and a second side plate (18) installed opposite to each other, and a first end plate (71) and a second end plate (72) installed opposite to each other. The first side plate (17), the first end plate (71), the second side plate (18) and the second end plate (72) are arranged in sequence. The ceiling (16) covers the upper parts of the first side plate (17), the first end plate (71), the second side plate (18), and the second end plate (72). The bottom plate covers the lower parts of the first side plate (17), the first end plate (71), the second side plate (18), and the second end plate (72). The first air inlet (8) is installed on the first end plate (71), and the second air inlet (9) and the third air inlet (10) are installed on the second end plate (72). The blower according to claim 11.

13. The control unit (6) includes an electric cabinet (61) and a control panel (62) electrically connected to the electric cabinet (61). The first end plate (71) includes a first end plate body (712) adjacent to the second side plate (18) and a first end door plate (711) adjacent to the first side plate (17). The electric cabinet (61) is installed on the side facing the chamber of the first end door plate (711). The first air inlet (8) is installed on the first end door plate (711). Also, an installation opening is installed on the first end door plate (711), and the control panel (62) is installed outside through the installation opening. The blower according to claim 12.

14. Both the motor (1) and the compression unit (14) are arranged on the side facing the chamber of the first end plate body (712). The blower according to claim 13.

15. The first side plate (17) includes a first front door (171) adjacent to the first end plate (71) and a first rear door (172) adjacent to the second end plate (72). The compression unit (14) is arranged on the side facing the chamber of the first front door (171), and the motor (1) is arranged on the side facing the chamber of the first rear door (172). The blower according to any one of claims 12 to 14.

16. The compressed gas outlet (19) is installed on the second end plate (72), and the compressed gas outlet of the compression unit (14) communicates with the compressed gas outlet (19). The blower according to any one of claims 12 to 15.

17. All of the first air inlet (8), the second air inlet (9), and the third air inlet (10) are provided with air inlet grids for each. The blower according to any one of claims 11 to 16.

18. The blower is applicable to perform air cooling for the motor (1), and further includes a motor fan (2) installed between the motor (1) and the second air inlet (9), and the control fan is installed on the side facing the control unit (6) of the first air inlet (8). The blower according to any one of claims 11 to 17.

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