Blower unit

Abstract

Disclosed is an improved fixing device capable of suppressing the up, down, left, and right movement of a motor placed inside a case, and a blower unit including the same. The blower unit includes a case, a motor disposed inside the case, a plurality of fans disposed on one side and the other side of the motor and disposed on the outside of the case, and a fixing device disposed inside the case and coupled to the motor, wherein the fixing device includes a main body surrounding the outer surface of the motor and a plurality of protrusions disposed on the outside of the main body and coupled to the case.

Description

Technology Field

[0001] The present invention relates to a blower unit installed inside a vehicle. Background Technology

[0002] Between the driver's seat and the passenger seat of the vehicle, a console box for temporarily storing items is provided, and inside the console box, a blower unit is positioned to discharge air conditioned by the air conditioning system toward the rear seat of the passenger compartment.

[0003] The blower unit may include a motor, fans positioned on one side and the other side of the motor, a case housing the motor inside, and a fixing device positioned on the outer surface of the motor to fix the motor to the case. The motor may include a BLDC motor (Brushless DC electronic motor).

[0004] However, since BLDC motors have a narrower width than general motors, an imbalance in the center of gravity may occur even when they are fixed to a case by a fixing device. Consequently, when the motor rotates, an imbalance in the motor's balance may occur, leading to movement in the up, down, left, and right directions. Therefore, there is a problem where the motor's performance is degraded or noise is generated due to vibrations caused by the movement in the up and down direction.

[0005] In addition, due to the small width of the BLDC motor, it is difficult to fasten it to a fixture or case, or the fixture holding the motor cannot be stably fixed to the case, causing a gap to form between the fixture and the case, which may cause the motor to shake. As a result, there is a problem in that the motor's performance cannot be maintained stably. The problem to be solved

[0006] The present invention is intended to solve the above-mentioned problems, and the objective according to an embodiment of the present invention is to provide an improved blower unit capable of suppressing the up-down-left-right movement of a motor placed inside a case.

[0007] In addition, the objective according to an embodiment of the present invention is to provide an improved blower unit that allows a fixing device to be stably fixed to a case. means of solving the problem

[0008] A blower unit according to an embodiment of the present invention comprises: a case; a motor disposed inside the case; a plurality of fans disposed on one side and the other side of the motor and disposed on the outside of the case; and a fixing device coupled to the motor and disposed inside the case; wherein the fixing device comprises: a main body surrounding the outer surface of the motor; and a plurality of protrusions disposed on the outside of the main body and coupled to the case.

[0009] The above fixing device includes a protrusion disposed on one side and the other side of the main body; and the plurality of protrusions may include a first protrusion disposed on one side inside the case relative to the protrusion; and a second protrusion disposed on the other side inside the case relative to the protrusion.

[0010] The above case may include a first housing that accommodates the first projection; and a second housing that is coupled to the first housing and accommodates the second projection.

[0011] The first housing may include a first coupling portion to which the first projection is coupled, and the second housing may include a second coupling portion to which the second projection is coupled.

[0012] The first coupling part may include a first coupling hole that accommodates the first projection, and the second coupling part may include a second coupling hole that accommodates the second projection.

[0013] The above fixing device includes a packing disposed on the first projection and the second projection; and the packing comprises a first packing disposed on the outer surface of the first projection; and

[0014] It may include a second packing disposed on the outer surface of the second projection.

[0015] The first projection may include a first receiving portion disposed inside the first packing; and a second receiving portion disposed outside the first packing and disposed inside the first coupling hole.

[0016] The second projection may include a third receiving portion disposed inside the second packing; and a fourth receiving portion disposed outside the second packing and disposed inside the second coupling hole.

[0017] The plurality of fans may include a plurality of blades; and a plate supporting the plurality of blades.

[0018] The protrusion of the above main body may protrude further than the edge of the plate of the plurality of fans.

[0019] It may include a bracket disposed on the above-mentioned protrusion.

[0020] The second housing may include a third protrusion that is coupled to the bracket.

[0021] The above case can be configured as a scroll case.

[0022] The motor includes a connector that receives power supplied from the outside; and the first housing may include a connector hole that passes a part of the connector.

[0023] The above case includes a receiving space formed by the combination of the first housing and the second housing; and the connector may be exposed to the outside of the case through the connector hole from inside the receiving space.

[0024] The above receiving space may be formed inside at least one of the first housing and the second housing.

[0025] The above receiving space can accommodate at least one of the first protrusion and the second protrusion provided as a single unit. Effects of the invention

[0026] According to an embodiment of the present invention, since the movement of the motor placed inside the case in the up, down, left, and right directions is suppressed, the performance of the motor can be maintained and noise caused by the movement of the motor in the up and down direction can be reduced.

[0027] In addition, according to an embodiment of the present invention, since the fixing device is stably fixed to the case, the motor can maintain stable performance. Brief explanation of the drawing

[0028] FIG. 1 is a perspective view of a blower unit according to an embodiment of the present invention. Figure 2 is a drawing showing the first housing separated from the second housing. Figure 3 is a drawing showing the interior of the first housing. Figure 4 is a plan view illustrating the fixing device attached to the motor. FIG. 5 is a drawing showing a blower unit with the first housing removed. FIG. 6 is a perspective view showing a fixing device attached to a motor. FIG. 7 is a rear perspective view showing a fixing device attached to a motor. Figure 8 is a cross-sectional view along line AA of Figure 1. FIG. 9 is a drawing illustrating the third projection, the fourth projection, the third groove, and the fourth groove. Specific details for implementing the invention

[0029] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0030] However, the technical concept of the present invention is not limited to some of the described embodiments but can be implemented in various different forms, and within the scope of the technical concept of the present invention, one or more of the components among the embodiments may be selectively combined or substituted.

[0031] In addition, terms used in the embodiments of the present invention (including technical and scientific terms) may be interpreted in a sense that is generally understood by those skilled in the art to which the present invention belongs, unless explicitly and specifically defined otherwise. Terms that are commonly used, such as terms defined in advance, may be interpreted in consideration of their meaning in the context of the relevant technology.

[0032] Furthermore, the terms used in the embodiments of the present invention are for the purpose of describing the embodiments and are not intended to limit the present invention.

[0033] In this specification, the singular form may include the plural form unless specifically stated otherwise in the text, and when described as “at least one of A and B, C (or more than one of them),” it may include one or more of all combinations that can be formed from A, B, and C.

[0034] In addition, terms such as first, second, A, B, (a), (b), etc. may be used to describe the components of the embodiments of the present invention.

[0035] These terms are intended merely to distinguish a component from other components and are not limited by the essence, order, sequence, etc. of the component.

[0036] And, where it is stated that a component is 'connected', 'combined', or 'connected' to another component, this may include not only cases where the component is directly connected, combined, or connected to the other component, but also cases where it is 'connected', 'combined', or 'connected' due to another component located between the component and the other component.

[0037] Furthermore, when described as being formed or placed "above or below" each component, "above" or "below" includes not only cases where two components are in direct contact with each other, but also cases where one or more other components are formed or placed between the two components. Additionally, when expressed as "above or below," it may include the meaning of a downward direction as well as an upward direction relative to a single component.

[0038] Hereinafter, embodiments will be described in detail with reference to the attached drawings, provided that identical or corresponding components are given the same reference number regardless of the drawing symbols, and redundant descriptions thereof will be omitted.

[0039] FIG. 1 is a perspective view of a blower unit according to an embodiment of the present invention, FIG. 2 is a drawing showing the first housing separated from the second housing, FIG. 3 is a drawing showing the inside of the first housing, FIG. 4 is a plan view showing the fixing device coupled to the motor, FIG. 5 is a drawing showing the blower unit with the first housing removed, FIG. 6 is a perspective view showing the fixing device coupled to the motor, FIG. 7 is a rear perspective view showing the fixing device coupled to the motor, and FIG. 8 is a cross-sectional view along line AA of FIG. 1.

[0040] Referring to FIGS. 1 to 8, a blower unit (100) (100) according to an embodiment of the present invention includes a case (110) (110), a motor (120) (120), a plurality of fans (130) (130) and a fixing device (140) (140).

[0041] In this embodiment, the first direction refers to a direction from the first projection (143a) to the second projection (143b) to be described later, or from the second projection (143b) to the first projection (143a), or an up-and-down direction; the second direction refers to a direction perpendicularly intersecting the first direction and a front-and-back direction; and the third direction may refer to a direction horizontally intersecting the second direction and a left-and-right direction.

[0042] The case (110) may be placed inside a console box positioned between the driver's seat and the passenger seat of a vehicle. The case (110) may accommodate a motor (120) that is housed inside the console box. The case (110) may include a scroll case (110) manufactured by a casting method.

[0043] The case (110) may include a first housing (111) and a second housing (112).

[0044] The first housing (111) can accommodate a portion of the motor (120) inside. The first housing (111) may have a shape that surrounds a portion of the main body (141) of the fixing device (140) to be described later. Accordingly, the first housing (111) may be provided with a shape that is hollow inside.

[0045] The first housing (111) may include a connector hole (111a) and a first coupling part (111b).

[0046] A connector hole (111a) may be placed in a part of the first housing (111). Through the connector hole (111a), a part of the connector (123) of the motor (120) placed inside the case (110) may be exposed to the outside of the case (110).

[0047] In this embodiment, the connector hole (111a) is exemplified as being placed in the first housing (111), but is not limited thereto. The connector hole (111a) may be placed in either the first housing (111) or the second housing (112), and the connector hole (111a) may be placed in one of the housings (111, 112) on the side where the second projection (143b) among the plurality of projections (143) to be described later is placed.

[0048] The first coupling portion (111b) may protrude from the inner surface of the first housing (111) along the first direction. The first coupling portion (111b) may come into contact with the first projection (143a) to be described later. When the fixing device (140) is placed inside the receiving space (110a), the first coupling portion (111b) may protrude to the portion where the first projection (143a) to be described later is located. The first coupling portion (111b) may come into contact with and be supported by the first packing (144) to be described later.

[0049] The first coupling part (111b) may include a first coupling hole (111b1).

[0050] The first coupling hole (111b1) may be formed concavely along the first direction at one end of the first coupling part (111b). The first coupling hole (111b1) may accommodate the first projection (143a) to be described later. Additionally, the first coupling hole (111b1) may be in contact with the first packing (144) to be described later and supported by the first packing (144).

[0051] The second housing (112) is coupled to the first housing (111) and can accommodate a part of the motor (120) inside. The second housing (112) may have a shape that surrounds a part of the main body (141) of the fixing device (140) to be described later. Accordingly, the second housing (112) may be provided with a shape that is hollow inside.

[0052] When the second housing (112) is combined with the first housing (111), a receiving space (110a) can be formed inside the case (110). A motor (120) and a fixing device (140) can be received inside the receiving space (110a).

[0053] In this embodiment, the receiving space (110a) is exemplified as being formed by the combination of the first housing (111) and the second housing (112), but is not limited thereto. The receiving space (110a) may be formed inside at least one of the first housing (111) and the second housing (112).

[0054] The second housing (112) may include a second coupling part (112b) and a third coupling part (112c).

[0055] The second coupling portion (112b) may protrude from the inner surface of the second housing (112) along the first direction. The second coupling portion (112b) may come into contact with the second projection (143b) to be described later. When the fixing device (140) is placed inside the receiving space (110a), the second coupling portion (112b) may protrude to the portion where the second projection (143b) to be described later is located.

[0056] The second coupling part (112b) may be provided in multiple numbers. For example, two second coupling parts (112b) may be provided. The second coupling part (112b) may be spaced apart along the second direction. The second coupling part (112b) may be positioned at a location where the second projection (143b), to be described later, is positioned inside the receiving space (110a) when the fixing device (140) is positioned inside the case (110). The second coupling part (112b) may be supported by contacting the second packing (144b), to be described later.

[0057] The second coupling part (112b) may include a second coupling hole (112b1).

[0058] The second coupling hole (112b1) may be formed concavely along the first direction at one end of the second coupling part (112b). The second coupling hole (112b1) may each accommodate the second projection (143b) to be described later.

[0059] The third connecting part (112c) may protrude from the inner surface of the second housing (112) along the first direction. The third connecting part (112c) may come into contact with the bracket (142) to be described later. When the fixing device (140) is placed inside the receiving space (110a), the third connecting part (112c) may protrude to the portion where the bracket (142) is located.

[0060] The third connecting part (112c) may be provided in multiple numbers. For example, two third connecting parts (112c) may be provided. The third connecting part (112c) may be spaced apart along the second direction inside the case (110).

[0061] The third connecting part (112c) may include an extension part (112c1) that is connected to a part of the bracket (142). The extension part (112c1) may protrude along a third direction from one end of the third connecting part (112c). The extension part (112c1) may be connected to the bracket (142) described later to secure the fixing device (140) to the case (110).

[0062] The motor (120) may be placed inside the first housing (111) and the second housing (112). The motor (120) may be placed in the receiving space (110a) of the case (110). The motor (120) may be coupled to a fixing device (140). With the motor (120) coupled to the fixing device (140), the fixing device (140) may be coupled to the case (110). The motor (120) may generate a driving force centered on a third direction. The motor (120) may include a BLDC motor (Brushless DC electronic motor).

[0063] The motor (120) may include a housing (121), a motor shaft (122), and a connector (123).

[0064] The housing (121) may be coupled to the fixed device (140). The housing (121) may accommodate a power source including a rotor and a stator inside. The housing (121) may be provided in a circular shape, but is not limited thereto. The housing (121) may have a shape that protrudes from one side of the fixed device (140) along a third direction while coupled to the fixed device (140).

[0065] The motor shaft (122) may protrude from one side and the other side of the housing (121) along the third direction. The motor shaft (122) may be exposed to the outside of the case (110) while protruding from one side and the other side of the housing (121). The motor shaft (122) can rotate a plurality of fans (130) by being rotated by a driving force generated from a power source. The motor shaft (122) may be rotated around the third direction by a driving force generated from the motor (120).

[0066] The connector (123) is connected to the power source of the motor (120) and can supply power to the power source of the motor (120) by being connected to an external power source. A portion of the connector (123) may be placed in the receiving space (110a) and may be exposed from inside the case (110) to outside the case (110) through the connector hole (111a) of the first housing (111). The connector (123) may include a body connected to the external power source and a connecting line connected to the body and connected to the power source of the motor (120).

[0067] Multiple fans (130) may be placed on one side and the other side of the motor (120). More specifically, multiple fans (130) may be coupled to the rotation axis of the motor (120). Multiple fans (130) may be placed on the outside of the case (110) while coupled to the rotation axis of the motor (120).

[0068] A plurality of fans (130) may include a first fan (131) and a second fan (132).

[0069] The first fan (131) may be positioned on one side of the case (110) along the third direction. The first fan (131) may include a plurality of first blades (131a), a first plate (131b), and a second plate (131c).

[0070] A plurality of first wings (131a) may be arranged in a circular pattern around the motor shaft (122). A first plate (131b) may be coupled to one side of the plurality of first wings (131a) to support the plurality of first wings (131a). The first plate (131b) may be provided in a ring shape. A second plate (131c) may be placed on the other side of the plurality of first wings (131a) that is not coupled to the first plate (131b). The second plate (131c) may be coupled to the motor shaft (122) and rotate in conjunction with the rotation of the motor shaft (122). When the second plate (131c) rotates, the plurality of first wings (131a) and the first plate (131b) may also rotate together.

[0071] The second fan (132) may be positioned on the other side of the case (110) along the third direction. The second fan (132) may be arranged symmetrically with respect to the first fan (131).

[0072] The second fan (132) may include a plurality of second blades (132a), a third plate (132b), and a fourth plate (132c).

[0073] A plurality of second wings (132a) may be arranged in a circular pattern around the motor shaft (122). A third plate (132b) may be coupled to one side of the plurality of second wings (132a) to support the plurality of second wings (132a). The third plate (132b) may be provided in a ring shape. A fourth plate (132c) may be placed on the other side of the plurality of second wings (132a) that is not coupled to the third plate (132b). The fourth plate (132c) may be coupled to the motor shaft (122) and rotate in conjunction with the rotation of the motor shaft (122). When the fourth plate (132c) rotates, the plurality of second wings (132a) and the third plate (132b) may also rotate together.

[0074] The fixing device (140) is coupled to the motor (120) and can be placed in the receiving space (110a) of the case (110).

[0075] The fixing device (140) may include a main body (141), a bracket (142), a plurality of protrusions (143) and a packing (144).

[0076] The main body (141) may surround the outer surface of the housing (121) of the motor (120). The main body (141) may be provided in a shape corresponding to the shape of the outer surface of the housing (121) of the motor (120), but is not limited thereto.

[0077] The main body (141) may include a first protrusion (141a) and a second protrusion (141b).

[0078] The first protrusion (141a) may protrude along a second direction from the outer surface of the main body (141). The first protrusion (141a) may protrude further than the edge of the first plate (131b) of the first fan (131). A hole may be formed in the first protrusion (141a) to support a bracket (142).

[0079] The second protrusion (141b) may protrude along a second direction from the outer surface of the main body (141). The second protrusion (141b) may be positioned on the side opposite to the side where the first protrusion (141a) is positioned on the outer surface of the main body (141). The second protrusion (141b) may protrude further than the edge of the third plate (132b) of the second fan (132). A hole may be formed in the second protrusion (141b) to support the bracket (142).

[0080] The bracket (142) can be placed on the first protrusion (141a) and the second protrusion (141b), respectively. The bracket (142) can be coupled to holes provided in the first protrusion (141a) and the second protrusion (141b).

[0081] A receiving portion capable of accommodating an extension portion (112c1) may be provided in the bracket (142). When the receiving portion is coupled to and fixed to the extension portion (112c1), shaking of the main body (141) can be prevented. Additionally, when the receiving portion is coupled to the extension portion (112c1), second-directional flow that may occur when the motor (120) rotates can be suppressed.

[0082] Additionally, since the housing (121) of the motor (120) having a small width is placed inside the case (110), the bracket (142) can resolve the imbalance in the center of gravity of the motor (120) that may be caused by a plurality of fans (130) placed on both sides of the motor (120). Therefore, the balance of the motor (120) is stabilized, and the motor (120) can maintain stable performance.

[0083] Multiple protrusions (143) may protrude from the outer surface of the main body (141).

[0084] A plurality of protrusions (143) may include a first protrusion (143a) and a second protrusion (143b).

[0085] The first projection (143a) may be positioned on one side of the receiving space (110a) with respect to the bracket (142). More specifically, the first projection (143a) may be positioned on the upper side of the motor shaft (122) along a first direction with respect to the motor shaft (122) while the fixing device (140) is coupled to the motor (120). The first projection (143a) may be positioned on the upper side of the receiving space (110a) of the case (110).

[0086] The first projection (143a) may include a first receiving portion (143a1) and a second receiving portion (143a2).

[0087] The first receiving portion (143a1) may protrude along a first direction from the outer surface of the main body (141). The first receiving portion (143a1) may be coupled with the first packing (144). The first receiving portion (143a1) may be placed inside the first packing (144).

[0088] The second receiving portion (143a2) may extend along a first direction from one end of the first receiving portion (143a1). The second receiving portion (143a2) may protrude further along the first direction than the non-contact surface of the first packing (144) while the first receiving portion (143a1) is coupled to the first packing (144). The second receiving portion (143a2) may be received in the first coupling hole (111b1) of the first coupling portion (111b) of the first housing (111).

[0089] The second projection (143b) may be positioned on the other side of the receiving space (110a) relative to the bracket (142). More specifically, the second projection (143b) may be positioned on the lower side of the motor shaft (122) along the first direction relative to the motor shaft (122) while the fixing device (140) is coupled to the motor (120). The second projection (143b) may be positioned spaced apart along the second direction. The second projection (143b) may be positioned on the lower side of the receiving space (110a) of the case (110).

[0090] The second projection (143b) may include a third receiving portion (143b1) and a fourth receiving portion (143b2).

[0091] The third receiving portion (143b1) may protrude along the first direction from the outer surface of the main body (141). The third receiving portion (143b1) may be combined with the second packing (144b). The third receiving portion (143b1) may be placed inside the second packing (144b).

[0092] The fourth receiving portion (143b2) may extend along a first direction from one end of the third receiving portion (143b1). The fourth receiving portion (143b2) may protrude further along the first direction than the non-contact surface of the second packing (144b) while the third receiving portion (143b1) is coupled to the second packing (144b). The fourth receiving portion (143b2) may be received in the second coupling hole (112b1) of the second coupling portion (112b) of the second housing (112).

[0093] In this embodiment, the first projection (143a) is exemplified as being positioned on the upper side of the main body (141) and the second projection (143b) is exemplified as being positioned on the lower side of the main body (141), but is not limited thereto. The first projection (143a) may be positioned on the lower side of the main body (141) and the second projection (143b) may be positioned on the upper side of the main body (141).

[0094] Additionally, in this embodiment, the first projection (143a) is provided in a single number and the second projection (143b) is provided in multiple numbers, but this is not limited thereto. The multiple projections (143) may include the first projection (143a) provided in multiple numbers and the second projection (143b) provided in a single number.

[0095] According to the present embodiment, since the first projection (143a) is received in the first coupling hole (111b1) of the first coupling part (111b) and the second projection (143b) is received in the second coupling hole (112b1) of the second coupling part (112b), the third-direction flow generated through the rotation axis of the motor (120) rotating around the third direction and the plurality of fans (130) can be suppressed. Accordingly, flow noise generated by the motor (120) can be suppressed, and the performance degradation of the motor (120) due to the flow of the motor (120) can be reduced.

[0096] The packing (144) may be placed on the first protrusion (143a) and the second protrusion (143b). The packing (144) may be made of rubber. Thus, the packing (144) can absorb vibrations caused by the flow generated in the motor (120).

[0097] The packing (144) may include a first packing (144) and a second packing (144b).

[0098] The first packing (144) may be placed on the outer surface of the first projection (143a). More specifically, the first packing (144) may come into contact with a part of the outer surface of the main body (141) and the first receiving portion (143a1) of the first projection (143a).

[0099] The second packing (144b) may be disposed on the outer surface of the second projection (143b). More specifically, the second packing (144b) may be in contact with a part of the outer surface of the main body (141) and the third receiving portion (143b1) of the second projection (143b).

[0100] The first packing (144) and the second packing (144b) according to the present embodiment can absorb vibrations caused by flow generated in the first direction (up and down direction) by the driving force of the motor (120). Accordingly, the stability of the motor (120) can be improved through the first packing (144) and the second packing (144b), and the performance of the motor (120) can be maintained.

[0101] Hereinafter, a blower unit (100) according to another embodiment of the present invention will be described. In the blower unit (100) according to another embodiment of the present invention, the same parts as the blower unit (100) according to one embodiment of the present invention will use the same reference numerals, and the description of the same parts will be omitted.

[0102] FIG. 9 is a drawing illustrating the third projection, the fourth projection, the first groove, and the second groove.

[0103] Referring to FIG. 9, a blower unit (100) according to another embodiment of the present invention may include a third projection (113), a fourth projection (114), a first groove (145), and a second groove (146).

[0104] The third projection (113) may be disposed on the inner surface of the first housing (111). The third projection (113) may protrude along a first direction from one end of the first coupling part (111b).

[0105] The fourth projection (114) may be disposed on the inner surface of the second housing (112). The fourth projection (114) may protrude along a first direction from one end of the second coupling part (112b). The fourth projection (114) may be provided in multiple numbers. For example, two fourth projections (114) may be provided. The fourth projection (114) may be spaced apart along a second direction.

[0106] The first groove (145) may be formed concavely along the first direction from one side of the first projection (143a). The first groove (145) may accommodate a portion of the third projection (113).

[0107] The second groove (146) can be formed concavely along the first direction from one side of the second projection (143b). The second groove (146) can accommodate a portion of the fourth projection (114).

[0108] The combination of the first groove (145) and the third projection (113), and the combination of the second groove (146) and the fourth projection (114), can suppress flow in the first, second, and third directions by the driving force of the motor (120). Accordingly, the stability of the motor (120) can be improved by the combination of the first groove (145) and the third projection (113), and the combination of the second groove (146) and the fourth projection (114), the performance of the motor (120) can be maintained, and the quietness of the motor (120) can be maintained. Explanation of the symbols

[0109] 100, 200. Blower unit 110. Case 120. Motor 130. Multiple fans 140. Fixture

Claims

Claim 1 A blower unit comprising: a case; a motor disposed inside the case; a plurality of fans disposed on one side and the other side of the motor and disposed on the outside of the case; and a fixing device coupled to the motor and disposed inside the case; wherein the fixing device comprises: a main body surrounding the outer surface of the motor; a plurality of protrusions disposed on the outside of the main body and coupled to the case; a projection disposed on one side and the other side of the main body; and a bracket disposed on the projection; wherein the plurality of protrusions and the bracket are arranged to intersect each other on the outside of the main body and coupled to the case. Claim 2 A blower unit according to claim 1, wherein the plurality of protrusions comprises: at least one first protrusion disposed on one side of the interior of the case relative to the protrusion; and at least one second protrusion disposed on the other side of the interior of the case relative to the protrusion. Claim 3 In paragraph 2, the case comprises: a first housing that accommodates at least one first projection; and a second housing coupled to the first housing and that accommodates at least one second projection; a blower unit. Claim 4 A blower unit according to paragraph 3, wherein the first housing comprises a first coupling portion coupled to at least one first projection; and the second housing comprises a second coupling portion coupled to at least one second projection. Claim 5 A blower unit according to claim 4, wherein the first coupling part comprises a first coupling hole that accommodates at least one first projection; and the second coupling part comprises a second coupling hole that accommodates at least one second projection. Claim 6 In claim 5, the fixing device comprises a packing disposed on at least one first projection and the second projection; and the packing comprises a first packing disposed on the outer surface of at least one first projection; and a second packing disposed on the outer surface of at least one second projection. Claim 7 In claim 6, the blower unit comprises: at least one first projection having a first receiving portion disposed inside the first packing; and a second receiving portion disposed outside the first packing and disposed inside the first coupling hole. Claim 8 A blower unit according to claim 6, wherein at least one second projection comprises: a third receiving portion disposed inside the second packing; and a fourth receiving portion disposed outside the second packing and disposed inside the second coupling hole. Claim 9 In paragraph 2, the blower unit comprises: a plurality of blades for the plurality of fans; and a plate supporting the plurality of blades. Claim 10 In claim 9, the protrusion of the main body protrudes further than the edge of the plate of the plurality of fans, a blower unit. Claim 11 delete Claim 12 In paragraph 3, the blower unit comprising: a second housing, a third protrusion coupled to the bracket. Claim 13 In claim 1, the case is a blower unit composed of a scroll case. Claim 14 In paragraph 3, the motor includes a connector that receives power supplied from the outside; and the first housing includes a connector hole that passes a part of the connector. Claim 15 In claim 14, the case comprises a receiving space formed by the combination of the first housing and the second housing; and the connector is exposed to the outside of the case through the connector hole from inside the receiving space, a blower unit. Claim 16 In item 15, the receiving space is a blower unit formed inside at least one of the first housing and the second housing. Claim 17 In claim 15, the blower unit, wherein the receiving space accommodates at least one projection provided in a smaller number among at least one first projection and at least one second projection.

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