KR20070082298A - Brushless direct current motor - Google Patents

Abstract

A brushless direct current motor is provided to improve reliability of products without damage due to a brush by installing a rotor having a permanent magnet on an external part of a stator. A brushless direct current motor includes a stator(222), a rotor(226), and a fixing unit(224). Coils are wound to the stator(222) which forms a magnetic field. The rotor(226) covers an outer side of the stator(222). The fixing unit(224) is contacted with a side of the stator(222), and fixes the stator(222). The stator(222) is fixed and the rotor(226) is rotated on an outer side of the stator(222). The fixing unit(224) is installed inside the stator(222) and is a center of the rotation of the rotor(226). A plurality of permanent magnets are installed on the rotor(226). The fixing unit(224) has a fixing member on which the stator(222) is fixed, and a fixing shaft of a rod shape which is formed on a central part along left and right directions.

Description

Bildish Motor {Brushless Direct Current Motor}

1 is a bird's eye view showing the installation state of a general multi-type air conditioner.

Figure 2 is a perspective view showing the internal structure of the outdoor unit of the air conditioner according to the prior art.

Figure 3 is an external perspective view of an outdoor unit of an air conditioner employing a preferred embodiment of the Bildish motor according to the present invention.

Figure 4 is an internal perspective view of an outdoor unit of an air conditioner employing an embodiment of the present invention.

5 is an exploded perspective view of an outdoor unit of an air conditioner employing an embodiment of the present invention.

Figure 6 is an exploded perspective view of a blower including a preferred embodiment of the Bildish motor according to the present invention.

Figure 7 is a perspective view of the right fan of the blowing fan combined with an embodiment of the present invention.

8 is an external perspective view of a preferred embodiment of a BLDC motor according to the present invention;

9 is an exploded perspective view of an embodiment of the present invention.

10 is a perspective view of a left rotor constituting an embodiment of the present invention.

11 is a cross-sectional view of an embodiment of the present invention.

Figure 12 is a cutaway perspective view showing the inside of the embodiment of the present invention.

Figure 13 is a perspective view of the support bracket and the reinforcing member for supporting both ends of the embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100. Outdoor unit 110. Base fan

120,120 '. Heat exchanger 130,130 '. Suction grill

135,135 '. Safety Net 140.Front Frame

142. Discharge safety net 144. Support frame

150. Cabinets 152. Access doors

154. Piping port 160. Barrier

170. Top panel 180,180 '. compressor

182. Accumulator 184. Receiver

190. Control Box 192. Control Box Mounting System

200, 200 '. Blower 202. Housing Support

210. Blower fan 210 '. Left fan

210 ". Right Fan 212. Coupling

212a. Fan screw ball 212b. Motor Screw Exposure Work

214. Guide section 216. Wings

218. Motor housing 220. BLDC motor

222. Stator 222 '. Stator body

222 ". Bobbin Assembly 222 '. Bobbin Guide

222 ". Bobbin 224. Fastening means

224a. Fixing surface 224b. Wire passing groove

226. Rotor 228. Flange

228a. Pan screw through hole 228b. Motor screw

230. Fan housing 232. Outlet

234,234 '. Orifice 240,240 '. Support Bracket

242. Central part 244. Supporting part

246. Shaft through hole 248. Rib fastener

250,250 '. Reinforcing member 252. Shaft through hole

254. Tightening rib B. Bearing

C. Coil M. Permanent Magnet

The present invention relates to a motor, and more particularly, to a BDC motor in which a stator and a motor shaft are fixed and a rotor provided outside the stator rotates around the motor shaft.

In general, an air conditioner is a cooling / heating system that cools a room by a repetitive action of inhaling hot air in a room, exchanging heat with a low temperature refrigerant, and then discharging it into the room. -Condenser-Expansion valve-Evaporator which forms a series of cycles.

And, as is well known, the air conditioner can be largely classified into a separate type air conditioner installed separately from the outdoor unit and the indoor unit, and an integrated air conditioner installed integrally with the outdoor unit and the indoor unit.

In addition, recently, a multi-type air conditioner has been released that can be effectively applied when installing two or more air conditioners in a home or when installing an air conditioner in each office in a building having several offices. This multi-type air conditioner is connected to a plurality of indoor units in one outdoor unit, it is possible to obtain the same effect as installing a plurality of separate air conditioner.

1 illustrates an example of a multi-type air conditioner in which two indoor units 20 and 30 are connected to one outdoor unit 10.

As shown in the drawing, a living room of a home is provided with a first indoor room 20 of a stand type, and a second indoor room 30 of a wall type is connected to an inner room. That is, one outdoor unit 10 installed on an outdoor side such as a veranda to compress, condense, and depressurize the refrigerant, and the first outdoor unit 10 connected to the outdoor unit 10 and installed in an independent space on the indoor side to evaporate the refrigerant, The air conditioner is configured by two indoor units 20 and 30.

The internal configuration of the outdoor unit 10 is schematically shown in FIG.

As shown in the drawing, in general, the outdoor unit 10 includes a compressor 40 for compressing a refrigerant at a high temperature and high pressure, and is connected to the compressor 40 to heat exchange the refrigerant discharged from the compressor 40 with outdoor air. Condensation of the outdoor heat exchanger (42), the outdoor blower fan (44) for blowing outdoor air toward the outdoor heat exchanger (42), and the refrigerant refrigerant discharged from the first and second indoor units (20, 30) Accumulator 46 or the like that accumulates.

In addition, a fan motor 50 is provided on the inner side or the rear side of the outdoor blower fan 44 to provide rotational power to the outdoor blower fan 44, and the fan motor 50 is supported by the motor mount 52. do.

On the other hand, although not shown, the first and second indoor (20, 30) inside the indoor heat exchanger to create a cool air by allowing the refrigerant to heat exchange with the indoor air, and an indoor blower for blowing the indoor air to the indoor heat exchanger side, etc. It is composed.

However, the fan motor 50 used in the outdoor unit 10 as in the prior art generates power by using alternating current, and a motor provided with a brush is used. Accordingly, there is a problem in that power is not smoothly transferred due to wear of the brush or a short due to a brush occurs.

Therefore, an object of the present invention is to solve the problems of the prior art as described above, the stator and the motor shaft is fixed, the rotor provided on the outside of the stator to provide a non-DC motor (BLDC) is rotated about the motor shaft will be.

A BLDC motor according to the present invention for achieving the above object includes a stator, in which a coil is wound to form a magnetic field; A rotor surrounding an outer side of the stator; In contact with one side of the stator, a fixing means for fixing the stator, characterized in that it has a configuration including a.

The stator is fixed, the rotor is characterized in that the rotation of the outside of the stator.

The fixing means is provided on the inside of the stator, characterized in that the rotation center of the rotor.

The rotor is characterized in that a plurality of permanent magnets are provided.

The fixing means is characterized in that it has a configuration comprising a fixing member to which the stator is attached and fixed, and a rod-shaped fixing shaft formed to the left and right in the central portion of the fixing member.

Both ends of the fixed shaft is fixed to the fan housing by a support bracket.

The stator includes a bobbin guide in close contact with an outer circumferential surface of the fixing member; It is formed to protrude radially from the outer circumferential surface of the bobbin guide, the outer surface is characterized in that it comprises a plurality;

According to the BLDC motor according to the present invention having such a configuration, there is an advantage that the reliability of the product is improved.

Hereinafter, exemplary embodiments of the present invention as described above will be described in detail with reference to the accompanying drawings. The BLDC motor according to the present invention may be used in various fields or products, but it will be described here by taking an example of the case used in the outdoor unit of the air conditioner.

3 and 4 are a perspective view of the outside and the internal configuration of the air conditioner outdoor unit employing the embodiment of the present invention, Figure 5 is an exploded perspective view of the air conditioner outdoor unit employing the embodiment of the present invention.

As shown in these figures, the outdoor unit 100 of the air conditioner is generally made of a rectangular cylinder, the lower end is provided with a base fan 110 to form a bottom surface. The base fan 110 supports a plurality of components installed on the upper side, and a plurality of fixing parts 112 are protruded to the left and right sides of the base fan 110 so that the base fan 110 is a screw ( It is to be fixed to the floor of the building by a fastening member such as a screw).

A pair of heat exchangers 120 and 120 'are installed at both ends of the base fan 110. The heat exchanger (120, 120 ') is to allow the refrigerant flowing through the inside and the outside air to exchange heat with each other, a pair is installed to face each other. That is, the left heat exchanger 120 is installed above the left end of the base fan 110, and the right heat exchanger 120 ′ is installed above the right end of the base fan 110.

Suction grills 130 and 130 'are respectively installed on left and right sides of the pair of heat exchangers 120 and 120'. The suction grills 130 and 130 ′ guide the air introduced into the outdoor unit 100, and are formed in a grid shape having a plurality of vents as shown in the drawing.

More specifically, a left side suction grill 130 for guiding the inflow of air from the left side of the outdoor unit 100 is installed on the left side of the left heat exchanger 120, and on the right side of the right heat exchanger 120 ′ 100) right suction grills 130 'for guiding air inflow from the right side are respectively installed.

Safety nets 135 and 135 'are respectively installed between the heat exchanger 120 and 120' and the suction grills 130 and 130 '. That is, a left safety net 135 is provided between the left heat exchanger 120 and the left suction grill 130 and a right safety net 135 'is provided between the right heat exchanger 120' and the right suction grill 130 '. ) Is provided. The safety nets 135 and 135 'have a mesh shape as shown, and serve to filter foreign substances in the air flowing through the suction grills 130 and 130' or to block the inflow of the body (finger, etc.) from the outside.

A pair of front frames 140 are installed at the front end of the base fan 110. The front frame 140 is installed on the left and right sides of the base fan 110, respectively, to support the suction grills 130 and 130 'and the safety nets 135 and 135'.

A discharge safety net 142 is installed between the pair of front frames 140. That is, the discharge safety net 142 is installed up and down on the front end of the base fan 110. The discharge safety net 142 is molded in the shape of a mesh like the safety nets 135 and 135 ', and prevents a part of the body (finger, etc.) from being introduced into the discharge port 232 of the fan housing 230 to be described below. Do it.

Support frames 144 are installed at the rear ends of the suction grills 130 and 130 'and the safety nets 135 and 135', respectively. The support frame 144 supports the rear ends of the suction grills 130 and 130 'and the safety nets 135 and 135' and at the same time supports the front end portions of the blowers 200 and 200 ', which will be described below.

The support frame 144 is respectively installed in pairs on the left and right of the upper surface of the base pan 110, the cross section is formed to have a '' 'shape. That is, the pair of support frames 144 are formed to be vertically long and face each other in a symmetrical shape, and have a tunnel shape with the inner sides facing each other open.

Therefore, a fan mounting groove 144 'is formed in the support frame 144 to accommodate the fan fixing part 201 of the blower 200 and 200', which will be described below. The fan mounting groove 144 ′ is formed to have a width corresponding to the thickness of the fan fixing part 201 to be described below. More precisely, the fan mounting groove 144 'is formed to have a size slightly larger than the thickness of the fan fixing part 201 to be described below, while the fan fixing part 201 is inserted into the fan mounting groove 144'. It is preferable that it is formed to be able to slide up and down.

The cabinet 150 is installed at the rear end of the base fan 110. The cabinet 150 forms a rear surface of the outdoor unit 100 and the rear half of the outdoor unit 100, and has a 'c' shape cross section (when viewed from above).

An inspection opening 152 is formed through the upper half of the rear surface of the cabinet 150. The inspection opening 152 is for the user to easily check the inside of the outdoor unit 100 from the rear of the outdoor unit 100, the control box 190 to be described below is located in front of the inspection opening (152).

The inspection opening 152 is shielded by the inspection plate 152 '. That is, a check plate 152 ′ having a shape and size corresponding to that of the check hole 152 in a quadrangle is further provided. The check plate 152 ′ is fastened from the rear of the outdoor unit 100 such as a screw. When the member is attached to the cabinet 150, the inspection opening 152 is shielded.

Piping installation hole 154 is formed through the front and rear bottom portion of the cabinet 150 back and forth. A pipe bracket 156 is mounted to the pipe installation hole 154. That is, the pipe bracket 156 having a size corresponding to the pipe mounting hole 154 shields the pipe mounting hole 154, and the pipe mounting hole 154 has refrigerant flowing into and out of the outdoor unit 100. Guide pipes (not shown) are installed through.

Barrier fixing pieces 158 are formed at the front end of the cabinet 150, respectively. The barrier fixing pieces 158 are formed at the left and right ends of the cabinet 150, respectively, and are formed in pairs at predetermined intervals. Therefore, a barrier groove 158 'is formed between the pair of barrier fixing pieces 158, in which both ends of the barrier 160 to be described below are inserted and accommodated.

The barrier groove 158 ′ has a tunnel shape of which an inner side is opened, and is formed to face each other at the distal end portion of the cabinet 150. The barrier groove 158 'is preferably formed to have a width corresponding to the thickness of the barrier 160 to be described below. More precisely, the width of the barrier groove 158 'is formed to be slightly larger than the thickness of the barrier 160 to be described below, so that the barrier 160 is slidably attached to the barrier groove 158' from above. This is preferred.

Barriers 160 are provided between the rear ends of the pair of heat exchangers 120 and 120 ′ to partition the internal space of the outdoor unit 100 back and forth. More specifically, a square plate-shaped barrier 160 is installed between the rear end of the left heat exchanger 120 and the rear end of the right heat exchanger 120 ', and the compressors 180 and 180' will be described below. The spaces in which the blowers 200 and 200 'are installed are separated from each other.

Looking more specifically, the barrier 160 is fixedly mounted to the front end of the cabinet 150. That is, both ends of the barrier 160 are accommodated and mounted in the barrier groove 158 ′ formed at the tip of the barrier 160 from above.

The upper panel 170 is provided on the upper side of the cabinet 150. The upper panel 170 is formed of a square flat plate having a size corresponding to the base pan 110. Therefore, the top panel (the top surface of the outdoor unit 100) forms the appearance.

In front of the barrier 160, a blower (200, 200 ') for forcing the flow of air is installed. That is, blowers 200 and 200 'are installed between the pair of heat exchangers 120 and 120', and the blowers 200 and 200 'are provided with a pair and are formed to form a layer up and down. That is, the blower 200, 200 ′ is composed of a lower blower 200 that is relatively installed on the lower side, and an upper blower 200 ′ that is installed above the lower blower 200, and the lower blower The apparatus 200 and the upper blower 200 'have the same configuration.

The pair of blowers 200 and 200 ′ are mounted by sliding insertion into the pair of support frames 144, respectively. Therefore, the fan fixing parts 201 inserted into the fan mounting grooves 144 'of the support frame 144 are protruded from side to side at the front ends of the blowers 200 and 200', respectively. The fan fixing part 201 is formed to have a thickness smaller than the width of the fan mounting groove 144 'of the support frame 144 and is configured to be slidable up and down while being inserted into the fan mounting groove 144'.

A housing support 202 is provided below the lower blower 200. The housing support 202 is installed on the upper surface of the base pan 110 to support the blowers 200 and 200 ′, and the upper surface has a shape corresponding to the bottom of the lower blower 200. That is, the top surface of the housing support 202 has a shape corresponding to the bottom surface of the fan housing 230 to be described below.

On the other hand, the blower (200,200 ') is not only provided with a pair up and down as illustrated, only one may be installed or three or more may be installed. The pair of blowers 200 and 200 ′ are configured to suck air from both sides and send the air forward. The detailed configuration of the blower 200, 200 'will be described below.

A plurality of compressors 180 and 180 'are installed at the rear of the barrier 160. The compressors 180 and 180 'are fixed to the base fan 110 and compress the refrigerant to become high temperature and high pressure.

Two compressors 180 and 180 'are provided as shown. That is, the constant speed compressor 180 for constant speed operation and the inverter compressor 180 ', which is a variable speed heat pump, are installed on the left and right sides. The constant speed compressor 180 is a compressor having a constant rotation speed, and the inverter compressor 180 'is an inverter scroll compressor whose rotation speed is adjusted according to the load capacity.

Therefore, when a small number of indoor units (not shown) are used and the load capacity is small, the inverter compressor 180 'is operated first, and the load capacity gradually increases until it cannot be handled by the inverter compressor 180' only. The constant speed compressor 180 is operated.

An accumulator 182 and a receiver 184 are installed near the compressors 180 and 180 ', respectively. The accumulator 182 filters the liquid refrigerant so that only the refrigerant in the gaseous state flows into the compressors 180 and 180 ', and the receiver 184 has a function of controlling the amount of refrigerant by storing excess refrigerant.

The control box 190 is installed at the rear of the barrier 160. That is, the control box mounting stand 192 is fixedly mounted to the rear of the upper end of the barrier 160, and the control box 190 is seated on the control box mounting stand 192.

A plurality of control parts are installed in the control box 190 to control the overall operation of the outdoor unit 100.

6 is an exploded perspective view showing the configuration of the blower 200, 200 'including the embodiment of the present invention.

As shown in the drawing, the blowers 200 and 200 ′ are provided at one side of the blowing fan 210 for generating a flow of air by rotation and the blowing fan 210 to rotate the blowing fan 210. A BLDC motor 220 for generating power for the vehicle; It is provided on the outside of the blowing fan 210 is composed of a fan housing 230 for guiding the air flowing by the blowing fan 210.

The blowing fan 210 is composed of a pair of fan coupling having a symmetrical shape. That is, as shown, the blowing fan 210 is made of a combination of the left fan 210 'and the right fan 210 ", the left fan 210' and the right fan 210" are symmetric with each other. It has a shape.

Therefore, the left fan 210 'and the right fan 210 "are combined with each other by a fastening member such as a screw to form the blowing fan 210. In this case, the left fan 210' And a right fan 210 "wrap around the outside of the BLDC motor 220.

The BLDC motor 220 is a motor that does not include a brush for power transmission. In general, a BLDC motor is used to mean a brushless direct current (BLDC) motor.

The BLDC motor 220 is located inside the blowing fan 210. In other words, the BLDC motor 220 is accommodated between the left fan 210 'and the right fan 210 ".

In more detail, the left fan 210 'and the right fan 210 "are fixed to the outside of the BLDC motor 220, so that the BLDC motor 220 will be described below. Rotate with rotor 226.

The fan housing 230 is formed to surround the outside of the blower fan 210, the left and right side surfaces of the fan housing 230 are opened, and a discharge port 232 is formed in front of the fan housing 230. The discharge port 232 is an outlet through which the air forcedly flowed by the blowing fan 210 is discharged.

Orifices 234 and 234 'are further installed at the left and right ends of the fan housing 230 to guide the flow of air. That is, the left orifice 234 is provided on the left side of the fan housing 230, and the right orifice 234 ′ is provided on the right side of the fan housing 230. A left orifice hole 234a through which air flows is formed in the left orifice 234, and a right orifice hole 234 ′ a through which air is introduced is formed in the left orifice 234.

Support brackets 240 and 240 'supporting both ends of the BLDC motor 220 are installed at left and right sides of the fan housing 230, respectively. That is, the left side of the fan housing 230 is provided with a left support bracket 240 for supporting the left end of the BLDC motor 220, the right side of the fan housing 230 is the Bieldi ( BLDC) A right support bracket 240 'supporting the right end of the motor 220 is provided.

Reinforcing members 250 and 250 'are further provided on the support brackets 240 and 240'. That is, the left support bracket 240 is provided with a left reinforcing member 250, and the right support bracket 240 'is provided with a right reinforcing member 250', respectively. The reinforcement members 250 and 250 ′ are for supporting both ends of the BLDC motor 220 together with the support brackets 240 and 240 ′.

And, although not shown, it is preferable that a buffer member (packing) is further provided at the central portion of the support brackets 240 and 240 '. The shock absorbing member absorbs the vibrations of the BLDC motor 220 or the blowing fan 210 so that the vibrations of the blowers 200 and 200 'are not transmitted to the outside, and has elasticity such as rubber. It is preferably made of.

FIG. 7 shows an example of a right fan 210 "constituting the blowing fan 210. As shown in FIG.

As shown in the drawing, the right fan 210 ″ includes a coupling part 212 contacting the left fan 210 ′ and a guide part formed at a position spaced apart from the coupling part 212 by a predetermined distance. 214 and a plurality of wings 216 and the like formed between the coupling portion 212 and the guide portion 214.

The coupling part 212 is formed in a disk shape, a plurality of fan screw holes (212a) are formed through the coupling part 212. The fan screw hole 212a is a hole through which a fan screw (not shown) through which the left fan 210 'and the right fan 210 "are fastened to each other. General fastening members such as screws and the like are used.

The motor screw fastening hole 212b is further formed in the coupling part 212. The motor screw fastening hole 212b is a hole through which the head of the motor screw 228b fastened to the flange portion 228 to be described below is exposed. Therefore, the motor screw fastening hole 212b preferably has a larger diameter than the fan screw hole 212a. The motor screw fastening holes 212b are formed at equal intervals between the fan screw holes 212a as shown.

A central portion of the coupling portion 212 is recessed to a right portion to form a motor accommodating portion 218. One side (right side) of the BLDC motor 220 is accommodated in the motor receiving unit 218. A shaft through hole 218a through which the fixed shaft 224 "of the BLDC motor 220 will be inserted is formed in the center portion of the motor accommodating part 218. The shaft through hole 218a is preferably formed to have a diameter larger than the outer diameter of the fixed shaft 224 "

The guide portion 214 has an annular annular shape as shown as a portion for supporting the ends of the plurality of wings 216 connected to each other. The wing 216 is a portion that directly generates the flow of air is provided with a plurality of equal intervals.

Since the left fan 210 'is the same as the configuration of the right fan 210 "and is installed to face each other, detailed description thereof will be omitted.

8 to 12 show examples of the BLDC motor 220, respectively. That is, FIGS. 8 and 9 show an external perspective view and an exploded perspective view of the BLDC motor 220, and FIG. 10 is a perspective view of a left rotor constituting the BLDC motor 220. Is shown. 11 and 12 illustrate cross-sectional and cutaway perspective views of the BLDC motor 220, respectively.

As shown in these figures, the BLDC motor 220 includes a stator 222 in which coils C and Coil are wound a plurality of times to form a magnetic field, and fixed to fix the stator 222. The rotor 226 is formed to surround the outside of the means 224 and the stator 222 and is provided with a plurality of permanent magnets (M).

The stator 222 and the fixing means 224 are connected to each other, the fixing means 224 is connected to the central portion of the stator 222 is a rotation center of the rotor 226. That is, the rotor 226 is configured to rotate about the fixing means 224. Therefore, a bearing B is provided between the rotor 226 and the fixing means 224.

The fixing means 224 is a fixing member 224 ′ to which the stator 222 is attached and fixed, and a rod-shaped fixing shaft 224 ″ formed to extend left and right at a central portion of the fixing member 224 ′. The fixing member 224 ′ has a cylindrical shape with a predetermined thickness, that is, has a hollow cylindrical shape and is fixed to an outer circumferential surface of the fixing shaft 224 ″. More specifically, the fixing member 224 ′ is fixedly coupled to the left fixing shaft 224 ″ a and the right fixing shaft 224 ″ b, which will be described below.

The stator 222 includes a bobbin guide 222 'which is in close contact with the outer circumferential surface of the fixing member 224', and a bobbin 222 ", which protrudes radially from the outer circumferential surface of the bobbin guide 222 '. .

More specifically, the bobbin guide 222 'is formed into an annular annular shape having a width corresponding to the thickness of the fixing member 224' to support the bottom surface of the bobbin 222 ". 222 ") are formed on the outer circumferential surface of the bobbin guide 222 'at equal intervals, and the coil C is wound a plurality of times on the outer surface of the bobbin 222". When electricity is supplied, a magnetic field is formed around the bobbin 222 ″.

The fixed shaft 224 ″ is formed to be long left and right as shown, and consists of two axes. That is, the left and right shafts are coupled to each other to form the fixed shaft 224 ″.

Looking in more detail, the fixed shaft 224 "is a left fixed shaft 224" a fixedly coupled to the left end of the fixing member 224 ', and the right fixed to the right end of the fixing member 224' And a fixed shaft 224 " b.

On the outer circumferential surfaces of the left fixed shaft 224 " a and the right fixed shaft 224 " b, a bearing B for facilitating rotation of the rotor 226 is provided. That is, a bearing B for facilitating the rotation of the left rotor 226 'and the right rotor 226 ", which will be described below, is located near the right end of the left fixed shaft 224 " a and the right fixed shaft 224. It is provided in the vicinity of the left end of "b), respectively.

A wire through groove 224b is formed in the right fixing shaft 224 "b. That is, a wire passing groove 224b recessed inwardly is formed in the left end of the right fixing shaft 224" b. . The wire passing groove 224b is a portion for guiding a wire (not shown) for supplying power to the coil C of the stator 222 to pass through. Of course, the wire passing groove 224b as described above may be formed in the left fixed shaft 224 "a or on both sides of the left fixed shaft 224" a and the right fixed shaft 224 "b.

In addition, a fixing member 224 ′ supporting the stator 222 is fixed to a central portion of the fixing shaft 224 ″, and both ends of the fixing shaft 224 ″ are respectively fixed to the support brackets 240 and 240 ′. It is fixedly mounted. That is, the left end of the left fixed shaft 224 "a is supported by the left support bracket 240, and the right end of the right fixed shaft 224" b is supported by the right support bracket 240 '. do.

Accordingly, both ends of the fixed shaft 224 ″ are formed with a fixed surface 224 a having a portion thereof cut out. As described above, the fixing surface 224a is formed. The fixing surface 224a is in contact with the fixing portion 246 'of the support brackets 240 and 240' to be described below, and serves to prevent the fixing shaft 224 "from rotating.

The rotor 226 is composed of a left rotor 226 ′ forming a left exterior, a right rotor 226 ″, etc. forming a right exterior, and the left rotor 226 ′ and a right rotor 226 ″. Are combined with each other.

The left rotor 226 ′ is provided with a stator accommodation portion 227. The stator accommodating part 227 forms a space for accommodating the stator 222 inside, and is formed by recessing a central portion of the left rotor 226 'to a left side.

The stator accommodating part 227 has a shape and size corresponding to the shape and size of the stator 222, and more specifically, an inner diameter of the stator 222 may accommodate the stator 222. It is formed to be larger than the outer diameter. The stator accommodating part 227 is formed with a plurality of vent holes 227 'through which air can flow.

Of course, the stator accommodating part 227 may be formed in the right rotor 226 ″, and may be formed in both the left rotor 226 ′ and the right rotor 226 ″.

On the inner circumferential surface of the stator accommodation portion 227, the plurality of permanent magnets M are fixed at equal intervals. That is, along the inner circumferential surface of the stator accommodation portion 227 of the rotor 226, a plurality of permanent magnets (M) are attached at equal intervals, and the plurality of permanent magnets (M) are mutually with the bobbin (222 "). Corresponding quantities are provided.

In this case, the permanent magnet M of the rotor 226 is positioned with a fine gap between the bobbin 222 ″ and the rotor 226 is positioned outside the stator 222. When installed, a minute gap is formed between the end of the bobbin 222 "and the permanent magnet (M).

Therefore, when electricity flows in the coil C wound on the bobbin 222 ″ of the stator 222, the magnetic field formed by the coil C and the magnetic field formed by the permanent magnet M are affected. The rotor 226 is rotated, that is, the stator 222 and the fixed shaft 224 "is fixed, so that the rotor 226 is rotated.

A flange portion 228 is formed on the outer circumferential surface of the rotor 226. The flange portion 228 protrudes radially from the outer circumferential surface of the rotor 226. More specifically, an outer circumferential surface of the left rotor 226 'is formed with a radially bent left flange portion 228', and an end of the right rotor 226 'is formed with the left flange portion 228'. And a right flange portion 228 " Thus, the left flange portion 228 'and the right flange portion 228 "are coupled by a screw or the like.

The blower fan 210 is fixed to the flange portion 228. That is, the left fan 210 'and the right fan 210 "are fastened to the flange portion 228, and the left fan 210' and the right fan 210" are fastened to the same fastening member (fan screw). By fastening to the flange portion 228 at the same time.

A plurality of fan screw through holes 228a are formed through the flange portion 228. The fan screw through hole 228a is a portion through which the fan screw (not shown) penetrates. That is, when the left fan 210 'and the right fan 210 "are abutted and coupled to each other, the Bildish (B) between the left fan 210' and the engaging portion 212 of the right fan 210" is coupled. BLDC) The flange portion 228 of the motor 220 is located, where the fan screw for fastening the left fan 210 'and the right fan 210 "passes through the fan screw through hole 228a. .

Meanwhile, three motor screws 228b are fastened to the flange portion 228. The motor screw 228b is for coupling the rotor 226 formed of two layers to each other. That is, the motor screw 228b is for coupling the left rotor 226 ′ and the right rotor 226 ″ to fasten the left flange 228 ′ and the right flange 228 ″ to each other. . Accordingly, three motor screw holes 228b 'through which the motor screw 228b penetrates are formed in the left flange portion 228' and the right flange portion 228 ".

13 is a perspective view of the support brackets 240 and 240 'and the reinforcing members 250 and 250'.

As shown in the drawing, the support brackets 240 and 240 'include a central portion 242 through which both ends of the fixed shaft 224 ″ pass, and a plurality of support portions 244 extending radially from the central portion 242. Is done.

The center portion 242 is formed in a disk shape, and is a portion for directly fixing and supporting both ends of the fixed shaft 224 ″. Therefore, the shaft pipe through which both ends of the fixed shaft 224 ″ penetrates the central portion 242. Through hole 246 is formed.

The support part 244 protrudes outward from the center part 242, and an end thereof is fastened to the fan housing 230 by a screw or the like. Preferably, three supports 244 are formed radially. More specifically, three support parts 244 are formed, and these three support parts 244 are preferably formed at equal intervals. That is, the angle between the adjacent support parts 244 is preferably formed to form a 120 degree to balance overall.

The shaft through hole 246 is further provided with a fixed portion 246 ′. That is, the shaft through-hole 246 is formed in a circular shape corresponding to the outer diameter of the fixed shaft 224 ", a portion of the outer peripheral surface of the shaft through-hole 246 is formed in a straight line to form a fixed portion 246 '. The fixing part 246 ′ is installed to contact the fixing surface 224 a of the fixing shaft 224 ″ described above. Therefore, the fixed shaft 224 ″ does not rotate due to the interference between the fixed portion 246 ′ and the fixed surface 224 a.

Rib fastening hole 248 is formed through the center portion 242 in pairs. The rib fastening hole 248 is a portion into which the fastening rib 254 of the reinforcing members 250 and 250 ′ to be described below is inserted.

The reinforcing members 250 and 250 ′ are fastened to the central portion 242 of the support brackets 240 and 240 ′ to support both ends of the fixed shaft 224 ″ together with the support brackets 240 and 240 ′. The shaft through hole 252 is formed as described above, The shaft through hole 252 has a shape and size corresponding to the shaft through hole 246 formed in the central portion 242 of the support brackets 240 and 240 '. The shaft fixing hole 252 is also formed with the same shaft fixing part 252 'as the fixing part 246'.

Fastening ribs 254 bent backwards are formed at the top and bottom of the reinforcing members 250 and 250 ′, respectively. The fastening rib 254 is to allow the reinforcing members 250 and 250 'to be mounted on the support brackets 240 and 240'. Therefore, the fastening ribs 254 are inserted into the rib fastening holes 248 formed in the central portion 242 of the support brackets 240 and 240 ', respectively.

Hereinafter, the operation of the BCD motor 220 and the air conditioner outdoor unit in which the BDC motor 220 is provided will be described.

First, when the air conditioner is operated (cooling operation), the refrigerant flows between the outdoor unit 100 and the indoor unit (not shown). Here, the coolant flow in the outdoor unit 100 will be described.

Gas refrigerant flowing from an indoor unit (not shown) enters the accumulator 182. Gas refrigerant from the accumulator 182 is introduced into the compressor (180, 180 '). As described above, the compressors 180 and 180 'may use only the inverter compressor 180' or both the constant speed compressor 180 and the inverter compressor 180 'according to the load amount.

The refrigerant discharged from the compressors 180 and 180 'is introduced into the heat exchangers 120 and 120'. Since the heat exchangers 120 and 120 'act as a condenser (in the cooling mode), the refrigerant is cooled through heat exchange with external air to become a liquid refrigerant.

The refrigerant passing through the heat exchangers (120, 120 ') is controlled to pass through the receiver 184, the amount of refrigerant is then introduced to the indoor unit (not shown). Although not shown, the refrigerant introduced into the indoor unit undergoes heat exchange in the indoor heat exchanger serving as an evaporator, and the refrigerant passing through the indoor heat exchanger flows back into the outdoor unit 100. Through this process, one cycle is completed.

Next, look at the operating state of the blower (200,200 ').

When electricity supplied from the outside is supplied to the stator 222, electricity flows through the coil C, and a predetermined magnetic field is formed around the bobbin 222 ". Thus, the magnetic field around the bobbin 222" and the The magnetic fields formed by the permanent magnets M of the rotor 226 collide with each other so that the rotor 226 rotates. In this case, the blowing fan 210 fixed to the flange portion 228 of the rotor 226 rotates together with the rotor 226 to generate a flow of air.

When the blowing fan 210 rotates, air is introduced from both sides of the outdoor unit 100. That is, the air outside the outdoor unit 100 is introduced into the outdoor unit 100 through the left suction grill 130 and the right suction grill 130 '.

Air introduced into the outdoor unit 100 through the left suction grill 130 and the right suction grill 130 ′ is left and right sides of the fan housing 230, that is, the left orifice hole 234a and the right orifice hole 234. It enters into the fan housing 230 through 'a) and enters into the blowing fan 210.

The air introduced into the blower fan 210 is forcedly blown radially by the rotation of the blower fan 210 and is discharged to the front of the fan housing 230 through the discharge port 232. As such, the air discharged through the discharge port 232 passes through the discharge safety net 142 and is discharged to the front of the outdoor unit 100.

On the other hand, the installation state of the blower (200, 200 ') as described above will be described.

First, the rotor 226 composed of two layers, that is, the left rotor 226 ′ and the right rotor 226 ″ has three motor screws each on the left flange 228 ′ and the right flange 228 ″. 228b) are coupled to each other by fastening. In this case, the stator 222 is positioned inside the stator accommodation portion 227 of the rotor 226, and the permanent magnet M is positioned at a spaced minute interval from the outside of the bobbin 222 ″. do.

Then, the blower fan 210 is coupled to the outside of the BLDC motor 220.

In this case, the BLD motor 220 is positioned between the left fan 210 'and the right fan 210 ", and then the left fan 210' and the right fan 210" are mutually located. Close contact In this case, the BLC motor 220 is accommodated in the motor accommodating part 218 of the left fan 210 ′ and the right fan 210 ″, wherein the coupling part 212 and the BCD are received. (BLDC) The flange portion 228 of the motor 220 is fastened.

Of course, at this time, a fan screw (not shown) is fastened to the fan screw hole 212a of the coupling part 212 through the fan screw through hole 228a of the BLDC motor 220. . In this case, the left fan 210 'and the right fan 210 "and the flange portion 228 of the BLDC motor 220 are combined at the same time by one fastening member (fan screw). The head portion of the motor screw 228b fastened to the flange portion 228 of the BLDC motor 220 is located inside the motor screw fastening hole 212b of the coupling portion 212.

Next, both ends of the fixed shaft 224 ″ are inserted into the shaft through hole 246 formed in the center portion 242 of the support brackets 240 and 240 ′. Of course, at this time, the fixed portion of the shaft through hole 246 246 ′ and the fixing surface 224 a of the fixed shaft 224 ″ are in contact with each other, and the support brackets 240 and 240 ′ are mounted with the reinforcing members 250 and 250 ′.

The support 244 of the support brackets 240 and 240 'is fixed to the edge of the fan housing 230 by a screw. When this happens, the assembly of the blower 200,200 'is completed.

The scope of the present invention is not limited to the above-exemplified embodiments, and many other modifications based on the present invention will be possible to those skilled in the art within the above technical scope.

As described above, in the BLDC motor according to the present invention, a rotor having a plurality of permanent magnets is provided on an outer side of a stator in which a coil is wound to form a magnetic field. Therefore, since a brush is not used in the BLDC motor according to the present invention, there is an advantage in that a poor power supply due to a short is prevented compared to a conventional motor in which a brush is used. That is, since many problems due to the brush are solved, the reliability of the product is improved.

In addition, unlike the general BLDC motor, the BLDC motor used in the present invention is provided with a stator on the inside and a rotor on the outside, while the stator is fixed. It is fixed to the support bracket to be mounted to the fan housing by the means and is stationary, and the outer rotor is configured to rotate. Therefore, there is an advantage that the power can be easily supplied to the motor shaft and the stator of the fixing means fixed.

In addition, a blowing fan is fixed to the rotor provided on the outside to rotate. That is, a blowing fan is mounted on the flange portion protruding from the outside of the rotor to rotate together with the rotor. Therefore, there is an effect that the rotation of the blowing fan becomes smoother.

Claims (7)

A stator, the coil being wound to form a magnetic field; A rotor surrounding an outer side of the stator; The BLDC motor having a configuration comprising a; fixing means for fixing the stator in contact with one side of the stator. The method of claim 1, wherein the stator is fixed, And the rotor is rotated outside the stator (BLDC) motor. The method of claim 1 or 2, wherein the fixing means, It is provided inside the stator, Bieldi (BLDC) motor, characterized in that the rotation center of the rotor. 4. The BLDC motor of claim 3, wherein the rotor is provided with a plurality of permanent magnets. The method of claim 3, wherein the fixing means, A fixing member to which the stator is attached and fixed; Bildish (BLDC) motor, characterized in that it has a configuration including a rod-shaped fixed shaft is formed long left and right in the central portion of the fixing member. 6. The BLDC motor of claim 5, wherein both ends of the fixed shaft are fixed to the fan housing by a support bracket. The method of claim 1, wherein the stator is, A bobbin guide in close contact with an outer circumferential surface of the fixing member; The bobbin guide is radially protruding from the outer peripheral surface, the outer surface of the non-bindy (BLDC) motor, characterized in that it comprises a plurality of bobbin winding coil.

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