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 the priority of Chinese Patent Application No. 202210564771.8 entitled "Blower" filed on May 23, 2022, and Chinese Patent Application No. 202221252128.3 entitled "Blower" filed on May 23, 2022, the entire disclosure of which is incorporated herein by reference.

[0002] (Technical Field) The present invention relates to the field of blowers, and in particular to a blower. [Background Art]

[0003] According to the prior art, a single-stage screw blower has a complex structure, and is strictly divided into functional areas, including a compressed gas inlet and flow path, a cooling air inlet for a motor and an electrical cabinet, an air inlet for an oil cooling fan, an outside air inlet for the whole machine, a high-temperature air outlet for the whole machine, etc. Although such a structure can guarantee maximum energy efficiency, it is difficult to effectively use space because the opening degree of the grids for the air inlet and the air outlet is relatively large. As a result, noise from the operating machine easily escapes, requiring extra space for noise reduction, but the noise reduction effect is still unsatisfactory.

[0004] In addition, conventional blowers require a separate air inlet flow path entering the compressor element, which also generates large noise. Moreover, the design of a separate air outlet flow path increases the ambient temperature and pollutes the environment. [Summary of the Invention] [Problem 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 proposes a blower capable of reducing the number of openings in a casing. [Means for solving the problem]

[0006] An embodiment of the present invention includes: a case, in which a chamber is formed within the case, and a first air inlet and a second air inlet are installed in the case sidewall, each separately penetrating the case sidewall; a control unit, installed within the chamber and applicable to communicate with the outside via the first air inlet; a motor, installed within the chamber, wherein the control unit is applicable to control and operate the motor, and the motor is applicable to communicate with the outside via the second air inlet; and a compressor unit, wherein the motor is applicable to drive and operate the compressor unit, and the compressor 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 and second air inlets are installed on the side wall of the case, resulting in a significantly reduced number of openings, which facilitates the reduction of noise coming from inside 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 facing each other, a first air inlet installed on the first end plate, and a second air inlet installed on the second end plate.

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

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

[0011] According to some embodiments of the present invention, the blower is applicable to provide air cooling for a motor and further includes a motor fan installed between the motor and a second air inlet, wherein the shaft of the motor fan and the shaft of the motor are coaxial, and the shaft of the motor fan is offset from 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 the air inlet passage is formed inside the fan cover.

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

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

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

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

[0017] According to some embodiments of the present invention, the motor is applicable to drive and operate a compression unit by a transmission system, and the blower further includes an oil cooler applicable to cool lubricating oil passing through the transmission system, and an oil cooling fan applicable to provide air cooling to the oil cooler, a third air inlet penetrating the case sidewall being installed on the case sidewall of the case, and the oil cooling fan communicating 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 facing each other, and a first end plate and a second end plate installed facing each other, wherein the first side plate, the first end plate, the second side plate and the second end plate are arranged in order, 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, a first air inlet is installed on the first end plate, and a second air inlet and a third air inlet are installed on the second end plate.

[0019] According to some embodiments of the present invention, the control unit includes an electrical cabinet and a control panel electrically connected to the electrical cabinet, the first end plate includes a first end plate body and a first end door plate, the first end plate body is adjacent to a second side plate, the first end door plate is adjacent to a first side plate, the electrical cabinet is installed on the side of the first end door plate facing the chamber, a first air inlet is installed on the first end door plate, and a mounting opening is provided on the first end door plate, through which the control panel is installed externally.

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

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

[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 each include an air inlet grille therefor.

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

[0025] Further aspects and advantages of the present invention will be partially apparent from the following description, or may be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] [Figure 1] It is a side view of the blower with the first side plate removed. [Figure 2] It is a front view of the blower. [Figure 3] It is a three-dimensional schematic diagram of the blower with the first side plate removed according to one embodiment. [Figure 4] It is a three-dimensional schematic diagram from one perspective of the blower with the second side plate removed according to one embodiment. [Figure 5] It is a three-dimensional schematic diagram from another perspective of the blower with the second side plate removed. [Figure 6] It is a three-dimensional schematic diagram from one perspective of the blower. [Figure 7] It is a three-dimensional schematic diagram of the blower from another perspective. [Figure 8] It is a top view of the blower with the top plate removed. [Figure 9] It is a three-dimensional schematic diagram of a sound insulation plate. [Figure 10] It is a three-dimensional schematic diagram of the blower with the first side plate removed according to another embodiment. [Figure 11] It is a three-dimensional schematic diagram of the blower with the second side plate removed according to another embodiment. DESCRIPTION OF EMBODIMENTS

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

[0028] In the description of the present invention, orientations or positional relationships indicated by terms such as "vertical," "horizontal," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "upper part," "lower part," "internal," and "external" are understood to be as shown in the drawings, and this is intended to facilitate and simplify the description of the present invention and does not indicate or suggest that the referred devices or elements have a particular orientation, are configured in a particular orientation, or need to operate in a particular orientation, and therefore cannot be construed as limiting the present invention.

[0029] Furthermore, the terms “First” and “Second” are used solely for descriptive purposes and cannot be interpreted as indicating or suggesting relative importance, or as implicitly indicating the number of technical features mentioned. Accordingly, features defined in “First” and “Second” may explicitly or implicitly include one or more of these features. In the description of the present invention, “multiple” means at least two, for example, two, three, etc., unless explicitly and specifically defined otherwise.

[0030] In the present invention, unless explicitly defined, terms such as “install,” “interconnect,” “connect,” and “fix” should be interpreted broadly, for example, by means of fixed connection, detachable connection, or integral formation; by means of mechanical connection, electrical connection, or communication with one another; by means of direct interconnection, indirect interconnection via an intermediate medium, internal communication between two elements, or interaction between two elements. To those skilled in the art, the specific meaning of the above terms in the present invention can be interpreted on a case-by-case basis.

[0031] The blower according to the present invention will be described in detail below in relation to Figure 1-11.

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

[0033] Referring to Figure 2-4, a chamber is formed inside the case, and the first air inlet 8 and the second air inlet 9 are installed on the 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 outside air can enter the chamber inside the case through the first air inlet 8 and the second air inlet 9.

[0034] In some embodiments of the present invention, referring to Figures 1-2 and 5-6, the control unit 6 may include an electrical cabinet 61 and a control panel 62, where electrical components such as inverters are located inside the electrical cabinet 61, and the control panel 62 is coupled with the electrical cabinet 61. A monitoring system may be integrated inside the control unit 6 to monitor various operating parameters of the blower, for example, the monitoring system may include warning information, maintenance plans, and online visual displays of the machine status.

[0035] Referring to Figure 1-4, the control unit 6 is located inside the chamber and communicates with the outside (outside the case) via a first air inlet 8 on the electrical cabinet 61, and the control unit 6 can be applied to control the operation of at least the motor 1. In some embodiments, the user can set relevant parameters of the control unit 6 that can control the motor 1 via a control panel 62. Furthermore, the control unit 6 can dissipate heat via the first air inlet 8 to prevent the control unit 6 from being destroyed by excessively high operating temperatures.

[0036] Referring to Figures 1 and 3-4, motor 1 communicates with the outside through a second air inlet 9. Motor fan 2 is used to air cool motor 1. When motor fan 2 is operating, outside air can be directed to motor 1 through the second air inlet 9 to dissipate heat, which prevents motor 1 from being destroyed due to excessively high operating temperatures.

[0037] Referring to Figure 4-5, the compression unit 14 is installed inside 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 inside 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 side wall of the case, and no other air inlets and outlets are provided, for example, no openings for drawing in cooling air and other openings for discharging hot air. Reducing the number of openings helps to reduce the transmission of noise from the inside of the case to the outside. On the other hand, the arrangement is simplified, which helps to reduce installation and future maintenance costs and to ensure stable operation of the blower at low temperatures.

[0039] In some embodiments of the present invention, relating to Figures 1, 6, and 11, the case side wall includes a first end plate 71 and a second end plate 72 that are installed opposite each other. A first air inlet 8 is installed on the first end plate 71, and a second air inlet 9 is installed on the second end plate 72. Thus, the first air inlet 8 and the second air inlet 9 are installed opposite each other, which reduces mutual interference so that 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 in heat dissipation of the motor 1 and the control unit 6, and ensures that the cooling air and hot air at both ends of the blower flow in different spaces.

[0040] In some embodiments of the present invention, the first air inlet 8 and the control unit 6 face each other directly, and the control fan is installed on the side of the first air inlet 8 facing the control unit 6. When the control fan is operating, outside air can be directed to the control unit 6 through the first air inlet 8 to dissipate heat from the control unit 6. By providing the control fan, the air circulation speed in the control unit 6 can be increased, so that more ambient heat can be removed, 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, 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 is free from particulate pollutants, which helps extend the service life of the inverter and other electrical components.

[0042] Referring to certain embodiments of the present invention, with reference to Figures 1 and 3, the control unit 6 further has a heat dissipation opening 11 that communicates with the chamber. In this way, the heat generated by the control unit 6 during operation can enter the chamber through the heat dissipation opening 11. Air entering from the first air inlet 8 carries away the heat from the control unit 6 by blowing directly toward it, and the heat enters the chamber through the heat dissipation opening 11. Referring to Figures 3 and 10, the heat dissipation opening 11 is located near the top of the electrical cabinet 61. Since the air carrying the heat from the control unit 6 is hot and light, positioning the heat dissipation opening 11 close to the top of the electrical cabinet 61 helps the hot air inside the electrical cabinet 61 to flow upward so that it enters the chamber through the heat dissipation opening 11.

[0043] The heat dissipation opening 11 is located on the side of the control unit 6 that faces outward from the first air inlet 8. Therefore, 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 into the chamber.

[0044] In some embodiments of the present invention, referring to Figures 3-5 and 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, outside air can be quickly guided to the motor 1 through a second air inlet 9, so that the heat of the motor 1 can be dissipated more quickly, which prevents the motor 1 from being destroyed due to excessively high operating temperatures. The shafts of the motor fan 2 and the motor 1 are arranged coaxially.

[0045] In some embodiments, as shown in Figure 10-11, the axis of the motor fan 2 is offset from the center of the second air inlet 9. In this way, the path between the second air inlet 9 and the motor fan 2 is meandering, which can reduce noise at the second air inlet 9.

[0046] In a further embodiment of the present invention, as shown in Figure 3-5, the second air inlet 9 faces directly toward the motor fan 2. When the motor fan 2 is operating, outside air can be introduced into the chamber through the second air inlet 9 to cool the components inside the chamber. The circulation speed of the air inside the chamber can be increased when the motor fan 2 is operating, so that more heat can be removed from inside the chamber and the operating temperature of the fan is lowered.

[0047] In some embodiments of the present invention, a motor cover is installed between the motor fan 2 and the second air inlet 9, and the motor cover forms a passage for intake air. In this way, the operating efficiency of the motor fan 2 can be improved, and the vortices generated by the operation of the motor fan 2 act directly on the second air inlet 9, accelerating the air circulation of the second air inlet 9. When the heat dissipation demand increases, the amount of air taken in by the motor fan 2 increases to meet the actual heat dissipation demand.

[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 may be a gear mechanism having high driving efficiency. In some embodiments, the transmission mechanism may be a belt drive mechanism.

[0049] In some embodiments of the present invention, the shaft of the motor 1 and the shaft of the transmission system can be installed horizontally, which results in simpler installation, lower maintenance costs, and higher drive stability. In other embodiments, the shaft of the motor 1 and the shaft of the transmission system can also be installed non-horizontally to increase the drive ratio and compressed air volume.

[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 some of the heat from the transmission system, which prevents the transmission system from operating at high temperatures for extended periods. Furthermore, the lubricating oil also lubricates the transmission system and reduces wear on the transmission system, thus extending the service life of the transmission system. The oil cooling fan 4 is used to air cool the oil cooler 3 in order to remove excess heat from the oil cooler 3. When the oil cooling fan 4 is operating, the air circulation speed of the oil cooler 3 can be increased, removing more heat than is surrounding the oil cooler 3 and reducing the operating temperature of the oil cooler 3. A 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, meaning that 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 configured to communicate with the outside through a third air inlet 10, allowing outside air to reach the oil cooling fan 4 through the third air inlet 10 and flow into the chamber inside the case. Specifically, when the oil cooling fan 4 is operating, outside air can be guided to the oil cooler 3 through the third air inlet 10, thereby dissipating heat from the oil cooler 3 and preventing the cooling effect on the lubricating oil from being affected by the excessively high operating temperature of the oil cooler 3.

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

[0052] In some embodiments of the present invention, the blower may also include an oil tank 15 positioned below the motor 1. A shock-absorbing pad (not shown) is installed between the oil tank 15 and the motor 1, and the motor 1 is mounted on 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 may also include an oil pump, which is integrated onto the compression unit 14 and can be applied to generate 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 into a single air inlet.

[0055] In some embodiments of the present invention, referring to Figure 3, the blower may also include a gas filter 12 connected to a compression unit 14. The gas filter 12 can be applied to draw in the hot gas in the chamber and send the filtered hot gas to the compression unit 14 for compression, thereby ensuring that pure gas enters the compression unit 14 and preventing the compression unit 14 from being destroyed 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 a separate air inlet passage.

[0056] In some embodiments of the present invention, the soundproofing panel 13 is installed between the gas filter 12 and the case side wall. As shown in Figure 9, the soundproofing panel 13 may include a sound-absorbing sponge 133 and a sheet metal bracket 134. The thickness of the sound-absorbing sponge 133 can be 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 coefficient of the sound-absorbing sponge 133 can be up to over 90% in the high-frequency range. The sound-absorbing sponge faces the gas filter 12; that is, the sound-absorbing sponge 133 is positioned on the side of the sheet metal bracket 134 facing the gas filter 12 in order to absorb and buffer the sound waves radiated thereto. The sheet metal bracket 134 is fixed next to the gas filter 12 and is designed to reflect sound waves passing through the sound-absorbing sponge 133, preventing sound wave energy from being radiated outside the case as much as possible.

[0057] Referring to Figure 3-5, there can be two sound-absorbing sponges 13, which are a first baffle 131 and a second baffle 132, respectively. The first baffle 131 is located in front of the blower, and the second baffle 132 is located on the left side of the blower. The sound-absorbing sponges 13 can further reduce the noise of the blower by reducing the amount of noise emitted from the gas filter 12 to the outside.

[0058] In some embodiments of the present invention, referring to Figures 3-4, 7, and 10-11, a compressed gas outlet 19 is provided on the side wall of the case. The compressed gas outlet 19 penetrates the side wall of the case, and the compressed gas outlet compressed by the compression unit 14 is suitable for communicating with the compressed gas outlet 19. In practical applications, the compressed gas outlet 19 can be adapted to connect to a pipeline of other equipment, which can use compressed air generated by a blower. That is, the motor 1 powers the compression unit 14, and the gas compressed by the compression unit 14 flows out of the compressed gas outlet 19 for use in other equipment.

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

[0060] In some embodiments of the present invention, referring to Figure 6-7, the case may include a ceiling 16, a bottom plate, first side plates 17 and second side plates 18 facing each other, and first end plates 71 and second end plates 72 facing each other. The first side plate 17, first end plate 71, second side plate 18, and second end plate 72 are arranged in order. The ceiling 16 covers the tops of the first side plate 17, first end plate 71, second side plate 18, and second end plate 72. The bottom plate covers the bottoms of the first side plate 17, first end plate 71, second side plate 18, and second end plate 72. A first air inlet 8 is installed on the first end plate 71, and a second air inlet 9 and a 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 detachable flat plates, which allows for easy maintenance of the parts on the back side of the corresponding side plate.

[0062] The first end plate 71 may 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, the first end door plate 711 is adjacent to the first side plate 17, and the electrical cabinet 61 is installed on the side of the first end door plate 711 facing the chamber. In other words, the electrical cabinet 61 is located to the right of the blower and directly behind the first end door plate 711. Therefore, by opening the first end door plate 711, repairs and maintenance of the electrical cabinet 61 located 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 a mounting opening is provided on the first end door plate 711, through which the control panel 62 is installed externally, which is convenient for the user to operate the control panel 62. In other words, the user can perform the relevant operations on the control panel 62 from outside the case.

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

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

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

[0066] In some embodiments of the present invention, the compressed air outlet 19 is mounted on the second end plate 72, i.e., the compressed air outlet 19 is located on the rear side of the blower. Thus, the blower has a better appearance, and the compressed gas outlet 19 is connected to other equipment from the rear side of the blower, preventing leaked gas generated at the compressed gas outlet 19 in the event of a pipeline leak from being blown directly onto users on the front, left, or right side, which facilitates increased safety in the use of the blower.

[0067] In some embodiments of the present invention, the first air inlet 8, the second air inlet 9, and the third air inlet 10 are all provided with their own air inlet grids. 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, preventing the user from hitting internal components of the case when passing through the first air inlet 8, the second air inlet 9, and the third air inlet 10, thereby ensuring the safety of the blower's operation. On the other hand, because the number of openings is small, the number of air inlet grids can be reduced, thereby reducing the man-hours required to assemble the air inlet grids and the case.

[0068] In some embodiments of the present invention, the blower further includes a motor fan 2 which can be applied to provide air cooling for the motor 1, and the motor fan 2 is installed between the motor 1 and a second air inlet 9. When the motor fan 2 is operating, outside air can be rapidly directed to the motor 1 through the second air inlet 9 to dissipate the heat from the motor 1 more quickly and prevent the motor 1 from being destroyed due to excessively high operating temperatures. The shafts of the motor fan 2 and the motor 1 are arranged coaxially. A control fan is installed on the side of the first air inlet 8 facing the control unit 6. When the control fan is operating, outside air can be directed to the control unit 6 through the first air inlet 8 to dissipate the heat from the control unit 6. By providing a control fan, the air circulation velocity in the control unit 6 can be increased so that it can carry away more heat surrounding the control unit 6, thereby lowering the operating temperature of the control unit 6 (mainly electrical components such as inverters).

[0069] The operation of a blower according to one embodiment of the present invention will be described in general below.

[0070] The motor fan 2, which is installed coaxially with the motor 1, takes in low-temperature outside air through the second air inlet 9. After the low-temperature air absorbs the heat from the motor 1, it cools the motor 1 and then becomes high-temperature air, which remains in the chamber. This is because the first side plate 17 and the ceiling 16 are designed to be closed and do not have any openings.

[0071] The control unit 6 takes in outside air through the first air inlet 8 on the first end plate 71 to dissipate heat from the inverter and electronic components, and the hot air is then exhausted into the chamber through the heat dissipation opening 11.

[0072] The oil cooling fan 4 at the front of the oil cooler 3 takes in air from the third air inlet 10, and after removing the heat from the lubricating oil being cooled, the hot air also enters the chamber.

[0073] High-temperature air is directly drawn in by the gas filter 12. Based on experiments, the temperature of the air entering the gas filter 12 is 8 to 10 degrees Celsius higher than the ambient temperature. After impurities are filtered out, the air enters the compression unit 14 and is compressed. Subsequently, the pressure fluctuation level is reduced by the silencer 5, and finally, the compressed air is transported to other systems through the compressed gas outlet 19. The first baffle 131 and the second baffle 132 are positioned around the gas filter 12 in a direction close to the first side plate 17, which helps to reduce noise from the sound source.

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

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

[0076] In this specification, reference terms such as “one embodiment,” “some embodiments,” “example,” “specific example,” and “some example” mean that the specific features, structures, materials, or properties 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 general expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or properties described may be combined as appropriate in any one or more embodiments or examples. In addition, those skilled in the art may associate or combine different embodiments or examples described herein.

[0077] While embodiments of the present invention have been shown and described, for the sake of clarity, these embodiments are illustrative and not limiting to the present invention. Modifications, alterations, alternatives, and variations of the above embodiments by those skilled in the art are within the scope of the present invention. [Explanation of Symbols]

[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 panel 712 First end plate body 72. Second end plate 8. First air inlet 9. Second air inlet 10. Third air inlet 11 Heat dissipation openings 12 Gas filters 13 Soundproofing panels 131 First baffle 132 Second baffle 133 Sound-absorbing sponge 134 Sheet metal bracket 14 Compression Units 15 Oil Tank 16 Ceiling 17. First side panel 171 First front door 172 First rear door 18. Second side panel 181 Second front door 182 Second rear door 19 Compressed gas outlet

Claims

1. A blower comprising 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 penetrate the case side wall separately are installed on the case side wall of the case, the control unit (6) communicates with the outside via the first air inlet (8), the motor (1) communicates with the outside via the second air inlet (9), and the compression unit (14) is applicable to compress the air inside the chamber. A compressed gas outlet (19) penetrating the side wall of the case is installed on the side wall of the case, and the compressed gas outlet of the compression unit (14) is in communication with the compressed gas outlet (19). The blower further includes a silencer (5) installed between the compressed gas outlet and the compressed gas outlet (19) of the compression unit (14).

2. The blower according to claim 1, wherein the case side wall includes a first end plate (71) and a second end plate (72) installed facing 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).

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

4. The blower according to claim 1, wherein the control unit (6) further has a heat dissipation opening (11) that communicates with the chamber, and the heat dissipation opening (11) is located on the side of the control unit (6) that faces outward from the first air inlet (8).

5. The blower according to claim 1, applicable to providing air cooling for the motor (1), and further comprising a motor fan (2) installed between the motor (1) and the second air inlet (9), wherein the shaft of the motor fan (2) and the shaft of the motor (1) are coaxial, and the shaft of the motor fan (2) is offset from the center of the second air inlet (9).

6. The blower according to claim 5, wherein a fan cover is installed between the motor fan (2) and the second air inlet (9), and an air inlet passage is formed inside the fan cover.

7. The blower according to claim 1, further comprising an oil tank (15) located below the motor (1) and supporting the motor (1).

8. The blower according to claim 1, further comprising a gas filter (12) connected to the compression unit (14), wherein the gas filter (12) is applicable to draw in gas from the chamber and send the filtered gas to the compression unit (14) for compression.

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

10. The blower according to claim 1 or 2, wherein the motor (1) is applicable to drive and operate the compression unit (14) by a transmission system, and the blower further includes an oil cooler (3) applicable to cooling lubricating oil passing through the transmission system, and an oil cooling fan (4) applicable to providing air cooling to 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).

11. The case includes a ceiling (16), a bottom plate, a first side plate (17) and a second side plate (18) installed facing each other, and a first end plate (71) and a second end plate (72) installed facing each other, wherein the first side plate (17), the first end plate (71), the second side plate (18), and the second end plate (72) are arranged in order, and the ceiling (16) includes the first side plate (17), the first end plate (71), and the second The blower according to claim 10, wherein the bottom plate covers the upper part of the side plate (18) and the second end plate (72), the bottom plate covers the lower part 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).

12. The blower according to claim 11, wherein the control unit (6) includes an electrical cabinet (61) and a control panel (62) electrically connected to the electrical 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 electrical cabinet (61) is installed on the side of the first end door plate (711) facing the chamber, the first air inlet (8) is installed on the first end door plate (711), and a mounting opening is provided on the first end door plate (711), and the control panel (62) is installed externally via the mounting opening.

13. The blower according to claim 12, wherein both the motor (1) and the compression unit (14) are located on the side of the first end plate body (712) facing the chamber.

14. The blower according to claim 11, wherein 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 located on the side of the first front door (171) facing the chamber, and the motor (1) is located on the side of the first rear door (172) facing the chamber.

15. The blower according to claim 11, wherein the compressed gas outlet (19) is installed on the second end plate (72), and the compressed gas outlet of the compression unit (14) is in communication with the compressed gas outlet (19).

16. The blower according to claim 10, wherein all of the first air inlet (8), the second air inlet (9), and the third air inlet (10) are each provided with an air inlet grid.

17. The blower according to claim 10, which is applicable to provide air cooling for the motor (1), and further includes a motor fan (2) installed between the motor (1) and the second air inlet (9), wherein a control fan is installed on the side of the first air inlet (8) facing the control unit (6).

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