CN102221018A - Energy-saving sound-proofing centrifugal fan set - Google Patents

Abstract

An energy-saving and sound-absorbing centrifugal fan unit relates to the field of centrifugal fans. It includes a sound insulation cover, a motor, a centrifugal fan and an air filter assembly, and is characterized in that: the motor is fixed in the sound insulation cover, and the fan end at the tail of the motor is facing the air filter window at the air inlet of the sound insulation cover; The air inlet of the centrifugal fan is provided with a muffler. The invention arranges the motor in the sound insulation cover and the fan end on the motor faces the air inlet, that is, the air is filtered and enters the box, which can not only cool the motor, so that the motor does not need to be cooled by its own fan, and the fan can be removed to lower the motor. power consumption, and ensure that the motor runs in a dust-free environment, which improves the service life of the motor; at the same time, it can make full use of the heat emitted by the motor to heat the gas sucked by the air inlet, so that there is no need to add heating elements. The temperature of the gas can be increased to help dry the water stains on the surface of the glass when washing it.

Description

An energy-saving and noise-absorbing centrifugal fan unit

technical field

The invention relates to a centrifugal fan unit, in particular to an energy-saving and sound-absorbing centrifugal fan unit.

Background technique

The equipment used to dry the water marks on the glass after washing on the existing glass washing machine is a centrifugal fan unit. This traditional centrifugal fan unit is composed of a sound insulation cover, a motor, a centrifugal fan and an air filter assembly. The sound insulation cover is a box frame structure, and an air inlet and an air outlet are arranged on it, an air filter assembly is provided at the air inlet as an air filter window, and a sound-absorbing material layer is arranged in turn on the inside of the sound insulation cover box And the sound-absorbing perforated plate, wherein the sound-absorbing material layer is polyurethane flame-retardant foam sound-absorbing board; the motor is connected with the centrifugal fan, wherein the motor is fixed outside the sound-proof cover through the motor connecting flange provided outside the sound-proof cover, and the centrifugal fan The fan is located in the sound insulation cover as a whole, and the suction port of the centrifugal fan is facing the air filter window at the air inlet of the sound insulation cover, and the exhaust port of the centrifugal fan communicates with the air outlet provided on the sound insulation cover. In production, in order to improve production efficiency, it is necessary to dry the glass as soon as possible and to ensure the quality of glass washing, some need to add heating elements at the air outlet of the centrifugal fan unit to increase the gas temperature to quickly dry the water on the glass.

The motor used in the traditional centrifugal fan unit is arranged outside the sound insulation cover, and the motor is cooled by its own fan. The cooling effect is limited and part of the power of the motor is lost, and the noise generated by the motor itself cannot be sound-proofed. In addition, the traditional centrifugal There is no suction muffler at the suction port of the fan on the fan unit, so the noise is very loud when the machine is running; in addition, the motor is arranged outside the sound insulation cover, so that the outer surface of the stator heat sink on the motor absorbs more dust, which is not conducive to heat dissipation, that is, the heat dissipation of the motor The effect is poor, which reduces the service life of the motor; in addition, according to field tests, the temperature of the heat sink on the surface of the motor in this traditional structure is as high as 61°C to 65°C at a room temperature of 15°C, and the heat energy emitted by the motor cannot be utilized.

Contents of the invention

The technical problem to be solved by the present invention is to provide an energy-saving and noise-reducing centrifugal fan unit for overcoming the large working noise of the centrifugal fan unit used in the traditional washing machine, the poor heat dissipation of the motor which reduces its service life and the low temperature of the gas at the air outlet.

The technical solution adopted by the present invention to solve the technical problem is: an energy-saving and noise-absorbing centrifugal fan unit includes a sound insulation cover, a motor, a centrifugal fan connected to the motor, and a set at the air inlet of the sound insulation cover as a The air filter assembly of the air filter window is characterized in that the motor is fixed in the sound insulation cover, and the fan end at the tail of the motor faces the air filter window at the air inlet of the sound insulation cover.

Compared with prior art, the advantages of the present invention are:

The invention arranges the motor in the sound insulation cover and the fan on the motor faces the filter window at the air inlet of the sound insulation cover, that is, the air is filtered and enters the box, which not only can cool the motor, but the motor does not need to be cooled by its own fan , the fan can be removed to reduce the power consumption of the motor, the temperature of the motor body is greatly reduced, and the motor runs in a dust-free environment, which improves the service life of the motor; at the same time, it can make full use of the heat emitted by the motor when it is working, and it is sound-insulated The high-speed airflow inhaled by the air inlet of the hood is absorbed and taken away, so that the temperature of the gas can be increased without adding a heating element, which is conducive to drying the water marks on the surface of the glass when washing it; in addition, the sound insulation cover combined with the muffler can maximize Reduce the noise when the centrifugal fan and motor work.

Description of drawings

Fig. 1 is the front view of structure of the present invention

Fig. 2 is the left view of the structure of the present invention (the left view after removing the fixed sealing plate on the left side of the sound insulation cover)

Figure 3 is a schematic diagram of the structure of the muffler

Fig. 4 is A-A sectional view of Fig. 3

Detailed ways

The content of the present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, an energy-saving and noise-eliminating centrifugal fan unit includes a sound insulation cover 1, a motor 2, a centrifugal fan 3, and an air filter assembly 4. The sound insulation cover 1 is a box frame structure, and in the The sound insulation cover 1 is provided with an air inlet 6 and an air outlet 7, and the air inlet 6 is provided with an air filter assembly 4 as an air filter window, and the inner side of the sound insulation cover 1 is provided with a sound-absorbing material layer 11 and a sound-absorbing perforation in turn Plate 12; preferably the sound-absorbing perforated plate 12 is a porous sound-absorbing steel plate with an aperture of 3 mm, and the sound-absorbing material layer 11 is a polyurethane flame-retardant foam sound-absorbing plate; plate, rear sealing plate, left door panel and front door panel, the sealing plate is fixed on the frame with bolts, the door panel is connected with the frame by hinges and gussets, and the joints of the sealing plate and the door panel and the frame are provided with The sealing strip can ensure the airtightness of the sound insulation enclosure box, and no powder or dust will be taken away by the inhaled air to dry the glass, which will affect the washing quality of the glass; in addition, the bottom of the sound insulation enclosure 1 frame There are six shock absorbers 8 that are symmetrical in front and rear and arranged in two horizontal rows, which can reduce the noise generated by vibration during the operation of the centrifugal fan unit; the air filter assembly 4 provided at the air inlet 6 is the second stage of the frame structure. Filtration device, it comprises folded coarse-effect filter screen 41 and long-term antistatic non-woven fabric bag filter 42; Large, high dust holding capacity, and then through secondary filtration, that is, the long-term anti-static non-woven bag filter 42, the air obtained by filtering is high in cleanliness and meets the requirements of gas for drying glass.

The motor 2 is fixed in the sound insulation cover 1 by the bearing frame provided in the sound insulation cover 1, the motor 2 is connected with the centrifugal fan 3, and its whole is located in the sound insulation cover 1, and the fan at the tail of the motor 2 It is facing the air filter window at the air inlet of the sound insulation cover 1; wherein the centrifugal fan 3 is a small and medium-sized centrifugal fan whose transmission mode is A type. The air entering the box body of the sound insulation cover 1 is filtered, which can ensure that the motor 2 runs in a dust-free environment, thereby improving the service life of the motor 2 .

As shown in Figures 3 and 4, the suction port of the centrifugal fan 3 is also provided with a muffler 5, the muffler 5 is a labyrinth muffler including a square tubular inner muffler sleeve 51 and a square tube one end capped outer muffler sleeve 52 The square tube-shaped inner muffler cover 51 includes a polyurethane flame-retardant foam sound-absorbing board that forms a square frame, and a sound-absorbing perforated plate is attached to the inside and outside of the square frame, and the bottom of the square frame is provided with the inner and outer sides of the square frame. The flange 53 of the corresponding size of the profile of the muffler sleeve; the screw rod 54 passes through the four uniformly distributed through holes provided on the periphery of the central hole of the flange 53 and the corresponding through holes on the circumferential wall of the end face of the suction port of the centrifugal fan 3. Screw the nuts on both sides to lock, so that the inner muffler sleeve 51 is fixed on the end face of the suction port of the centrifugal fan 3; The inner side of the housing is attached with a polyurethane flame-retardant foam sound-absorbing board and a sound-absorbing perforated plate in turn, and the inner and outer sides of the outer sound-absorbing sleeve 52 transition to the bottom surface at a chamfered angle, preferably a 45-degree chamfered angle; the outer sound-absorbing sleeve The sleeve 52 is fitted and fixed on the screw rod 54 through the corresponding through hole provided on its bottom surface, and the outer muffler sleeve 52 is sleeved on the square tubular inner muffler sleeve 51 to form a certain distance in a labyrinth The air intake channel communicates with the suction port of the centrifugal fan 3 , and the suction port of the labyrinth muffler 5 faces the air inlet 6 of the sound insulation cover 1 . The motor 2 drives the centrifugal fan 3 to operate to draw air into the box, and the strong aerodynamic noise generated at the fan suction port is reduced after being silenced by the labyrinth air intake channel.

The flow path of the air during the operation of the energy-saving and noise-absorbing centrifugal fan unit is shown in Figure 1. The air enters through the air filter window provided at the air inlet 6, washes and cools the motor 2 and the casing of the centrifugal fan 3, and then enters the labyrinth muffler 5. Then enter in the blower fan volute by centrifugal blower 3 suction ports, finally discharge the gas with certain temperature and wind pressure by the air outlet 7 that is communicated with blower blower outlet.

From the flow direction of the above air, it can be seen that the strong high-speed cold air flow entering the air filter window of the sound insulation cover 1 and cleaning it washes the cooling fins of the motor 2 to reduce the temperature of the motor 2 body, so that the motor 2 can also be removed according to the situation. The fan reduces the power consumption of the motor 2, which has an energy-saving effect, and the motor 2 can be kept running in a dust-free environment to increase its service life; in addition, the air is not sucked in from the front of the fan inlet, but through the labyrinth muffler 5, so the air flow is strong and dynamic The noise is absorbed and attenuated by the orifice plate around the labyrinth muffler and the polyurethane flame-retardant foam sound-absorbing board in the orifice plate, and then enters the fan volute, and the noise is reduced; The surface temperature of the body of the motor 2 is about 25°C to 26°C. The decrease in the temperature of the motor 2 is due to the heat emitted by the motor 2 being absorbed and taken away by the inhaled air, so that the temperature of the gas discharged from the air outlet 7 is increased, which is conducive to blowing. When the glass is dry-cleaned, the water stain on the glass surface not only ensures the product quality but also improves the product qualification rate.

The above embodiments are only used to illustrate the concept of the present invention, but not to limit the scope of the present invention. Those skilled in the relevant technical fields can also make various changes without departing from the scope of the present invention. Therefore, all equivalent technical solutions should also belong to the protection category of the present invention.

Claims (8)

1. an energy-saving muffling centrifugal fan group comprises acoustic hood (1), motor (2), the centrifugal blower (3) that links to each other with described motor (2) and the air filtering assembly of locating to be provided with at described acoustic hood (1) intake grill (6) as the air-filtering window (4), it is characterized in that: described motor (2) is fixed in the acoustic hood (1), and the air-filtering window located over against acoustic hood (1) intake grill (6) of the fan end of motor (2) afterbody.

2. a kind of energy-saving muffling centrifugal fan group according to claim 1 is characterized in that: the intakeport place is provided with silencing apparatus (5) at centrifugal blower (3).

3. a kind of energy-saving muffling centrifugal fan group according to claim 2 is characterized in that: described silencing apparatus (5) comprises Sound damping cover (51) and the outer Sound damping cover (52) of square tube one end capping shape in the square tube type for the mazy type silencing apparatus; Sound damping cover (51) comprises the polyurethane flame-proof foam acoustic board of forming square framework in the described square tube type, this square box inside and outside side is all set up the noise elimination perforated plate that is fixed with, and the Sound damping cover profile phase is answered big or small square flange (53) in this square framework bottom is provided with and is somebody's turn to do; Respective through hole and screw nut check on four the uniform through holes that lead screw (54) passes that described square flange (53) central hole periphery is provided with and the peripheral wall of centrifugal blower (3) intakeport end face in both sides, realize should in Sound damping cover (51) be fixed on centrifugal blower (3) the intakeport end face; The outer Sound damping cover (52) of described square tube one end capping shape is the square casing of an end opening, set up successively inward in this housing inboard and to be fixed with polyurethane flame-proof foam acoustic board and noise elimination perforated plate, and should become the bevelling transition with the bottom surface by the interior outer side surface of outer Sound damping cover (52), the respective through hole fit that should outer Sound damping cover (52) be provided with by its bottom surface is fixed on the described lead screw (54), and should outer Sound damping cover (52) is to be enclosed within the described square tube type upward formation one determining deviation and be the mazy type gas-entered passageway and be communicated with centrifugal blower (3) intakeport of Sound damping cover (51).

4. choose described a kind of energy-saving muffling centrifugal fan group of one wantonly according to claim 1 to 3, it is characterized in that: described air filtering assembly (4) is the cascade filtration device of tower structure, and it comprises collapsible low efficient filter screen (41) and long-acting antistatic nonwovens pocket type filter (42).

5. according to described a kind of energy-saving muffling centrifugal fan group of optional one of claim 1 to 3, it is characterized in that: described centrifugal blower (3) is the middle-size and small-size centrifugal blower of A formula for the kind of drive.

6. according to described a kind of energy-saving muffling centrifugal fan group of optional one of claim 1 to 3, it is characterized in that: described acoustic hood (1) base of frame is connected with vibration damper (8).

7. according to described a kind of energy-saving muffling centrifugal fan group of optional one of claim 1 to 3, it is characterized in that: the noise elimination perforated plate (12) that described acoustic hood (1) box inside is provided with is the porous sound absorption steel plate in 3 millimeters in aperture; The muffler material layer (11) that described acoustic hood (1) box inside is provided with is a polyurethane flame-proof foam acoustic board.

8. according to described a kind of energy-saving muffling centrifugal fan group of optional one of claim 1 to 3, it is characterized in that: described motor (2) is fixed on the bearing frame that is provided with in the acoustic hood (1).

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