JP2020016180A - Drain pump and fitting member for drain pump - Google Patents

Abstract

To provide a drain pump that can effectively reduce propagation of vibration to an indoor unit while suppressing the number of components and component cost, and to provide a fitting member for a drain pump.SOLUTION: An insertion hole through which a screw 60 passes is provided to a fitting part 32 for fixedly fitting a drain pump 1 to a fitting-top plate 50 via the screw 60. Multiple projections 37 projecting toward a side of the fitting-top plate 50 and abutting on the fitting-top plate 50 are dispersedly arranged around the insertion hole of the fitting part 32. The projections 37 reduce a contact area between the fitting part 32 of the drain pump 1 and the fitting-top plate 50 of an indoor unit.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a drain pump, for example, a drain pump that is used in an indoor unit of an air conditioner and is suitable for discharging drain water in a drain pan that receives water condensed by a heat exchanger to the outside, and drainage thereof. The present invention relates to a mounting member for a pump.

  In an indoor unit of an air conditioner that is embedded in the ceiling of a room, moisture in the air condenses during cooling operation and adheres to the heat exchanger, and water droplets generated by the adhered moisture are provided below the heat exchanger. Into a drain pan. A drain pump (also referred to as a drain pump) is used to discharge the drain water accumulated in the drain pan to the outside (outdoor) of the indoor unit.

  FIGS. 10 to 12 show a conventional example of such a drain pump and a main part of an air conditioner equipped with the drain pump. A conventional drain pump 101 shown in FIGS. 10 and 11A and 11B has a pump chamber (both not shown) for accommodating rotating blades, and a tubular suction port 112 provided at a lower portion of the pump chamber. And a synthetic resin housing 110 in which a tubular discharge port 113 extending laterally from the pump chamber is formed. A cylindrical synthetic resin lower cover (also referred to as a housing cover) 120 is attached to an upper portion (upper opening) of the housing 110 via an O-ring (not shown) as a seal member. The lower cover 120 is detachably attached to the housing 110 by a snap-fit function using the elastic force of a snap-fit arm 111 provided on the housing 110. A motor 140 including a stator, a rotor, and the like is mounted on an upper portion of the lower cover 120 such that a lead wire lead-out portion 141 for leading the lead wire 142 is exposed to the outside. The drive shaft of the motor 140 is connected to the rotation shaft of a rotary blade disposed in the pump chamber. A short cylindrical upper cover made of synthetic resin (also referred to as a motor cover) 130 with a ceiling covering the upper side of the motor 140 is attached to an upper portion (upper opening) of the lower cover 120. The upper cover 130 is detachably attached to the lower cover 120 by a snap fit function utilizing the elastic force of a snap fit arm 131 provided on the upper cover 130. At the upper part (ceiling part) of the upper cover 130, a mounting part 132 for mounting the drainage pump 101 to the mounting top plate 150 in the indoor unit is provided.

  In the illustrated conventional drain pump 101, mounting portions 132 having unequal pitches are formed at three locations near the outer periphery of the upper portion (ceiling portion) of the upper cover 130. An insertion hole 136 into which a screw 160 for fastening and fixing is inserted is formed in a fixing plate portion 135 extending outward from the upper end of each mounting portion 132 in the horizontal direction. As shown in FIG. 12, the drain pump 101 has a vibration-proof rubber (also referred to as a rubber bush) 155 interposed between (the upper surface of) the fixing plate portion 135 and (the lower surface of) the mounting top plate 150. The screw 160 is fixed (fastened) to the mounting top plate 150 by screwing (fastening) the screw 160 to (the screw hole provided in) the mounting top plate 150 through the insertion hole 136.

  In this drain pump 101, as shown in FIG. 12, the rotating blades fixed to the mounting top plate 150 of the indoor unit of the air conditioner by the mounting portion 132 and housed in the housing 110 (pump chamber) by the motor 140 Is rotated, the drain water accumulated in the drain pan 190 is sucked up from the suction port 112 and discharged from the discharge port 113 via the pump chamber. The discharged drain water is once guided upward through a pipe 113A connected to the discharge port 113, and then guided laterally to be drained out of the room (for example, refer to Patent Documents 1 and 2 below). See).

JP 2012-082790 A JP 2010-275972 A

  By the way, in a drain pump using a motor of this type, the vibration generated from the motor propagates to the indoor unit of the air conditioner, generating noise and deteriorating quietness. Therefore, as described above, when attaching the drain pump to the indoor unit, the vibration isolating rubber and the like are arranged between the mounting portion of the drain pump and the top plate of the indoor unit to reduce the propagation of vibration. .

  However, in the above-mentioned conventional drain pump, it is necessary to arrange a vibration-proof rubber or the like between the mounting portion of the drain pump and the mounting top plate of the indoor unit, and there is a concern that the number of parts and the cost of parts will increase. In recent years, in order to reduce the number of parts and the cost of parts, the use of anti-vibration rubber, etc. has been omitted and the drain pump (the mounting part) has been directly mounted on the indoor unit (the mounting top plate). The vibration of the pump may be transmitted to the indoor unit and resonate to generate loud noise.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a drain pump and a drain pump that can effectively reduce vibration propagation to an indoor unit while suppressing the number of parts and the cost of parts. An object of the present invention is to provide a mounting member for a pump.

  In order to solve the above-mentioned problems, a drain pump according to the present invention is basically a drain pump containing rotating blades that draws up water and discharges it to the outside by being rotated by a motor. Has a mounting portion for mounting and fixing to a mounting member via a fastening member, the mounting portion is provided with an insertion hole for passing the fastening member, around the insertion hole in the mounting portion A plurality of protrusions protruding toward the mounting member and brought into contact with the mounting member are dispersedly arranged.

  In a preferred aspect, the protrusion makes point contact or surface contact with the mounting member.

  In another preferred aspect, the protrusion has a hemispherical shape, a columnar shape, a truncated cone shape, or a column shape having a sectoral cross section along the circumferential direction around the insertion hole.

  In another preferred aspect, a wavy portion in which peaks and valleys are provided alternately around the insertion hole is provided, and the protruding portion is formed by the peaks in the wavy portion.

  In another preferred aspect, the plurality of protrusions are distributed and arranged on concentric circles around the insertion hole.

  In another preferred aspect, the plurality of protrusions are distributed on a plurality of concentric circles having different radii around the insertion hole.

  In a further preferred aspect, the plurality of protrusions distributed on a certain concentric circle are provided at different angular positions from the plurality of protrusions distributed on another concentric circle.

  In addition, the mounting member for the drain pump according to the present invention is basically mounted and fixed via a fastening member to a drain pump containing rotating blades that suck up water and discharge it to the outside by being rotated by a motor. A fastening hole in which the fastening member is fastened. The fastening member protrudes toward the drainage pump side around the fastening hole in the attachment member and contacts the drainage pump. It is characterized in that a plurality of projections to be brought into contact with each other are dispersedly arranged.

  According to the present invention, the mounting portion for mounting and fixing the drain pump to the mounting member is provided with an insertion hole for passing the fastening member, and around the insertion hole in the mounting portion, toward the mounting member. A plurality of protrusions that protrude and are brought into contact with the mounting member are arranged in a distributed manner, and the protrusions reduce the contact area of the mounting portion of the drainage pump with the mounting member. Vibration propagation to the unit can be effectively reduced, and thus noise of the air conditioner can be reduced.

The perspective view showing one embodiment of the drainage pump concerning the present invention. 2A is a plan view, and FIG. 2B is a cross-sectional view taken along the line U-U in FIG. The principal part enlarged view which shows the principal part of the air conditioner with which one Embodiment of the drainage pump which concerns on this invention was attached to the attachment top plate. (A)-(C) is a principal part expanded perspective view which shows the other examples (the 1-3) of the drainage pump which concerns on this invention, respectively. The principal part expansion perspective view which shows the other example (the 4) of the drainage pump which concerns on this invention. The principal part expansion perspective view which shows the other example (the 5) of the drainage pump which concerns on this invention. The other example (the 6) of the drainage pump concerning this invention is shown, (A) is a principal part enlarged perspective view, (B) is a principal part enlarged plan view. The principal part expansion perspective view which shows one Embodiment of the mounting top plate as a mounting member for drainage pumps concerning this invention. The principal part expansion perspective view which shows the other example of the mounting top plate as a mounting member for drainage pumps concerning this invention. FIG. 9 is a perspective view showing a conventional drain pump. 10A and 10B show a drain pump shown in FIG. 10, wherein FIG. 10A is a plan view and FIG. The principal part enlarged view which shows the principal part of the air conditioner in which the drainage pump of the conventional example was attached to the mounting top plate.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  In each of the drawings, gaps formed between members, separation distances between members, and the like may be exaggerated for ease of understanding of the invention and for convenience of drawing. is there.

[Embodiment in which projection is provided on drain pump side]
1 and 2 (A) and 2 (B) show an embodiment of a drain pump according to the present invention. FIG. 1 is a perspective view, FIG. 2 (A) is a plan view, and FIG. 2 (B) is FIG. FIG. 4A is a cross-sectional view taken along the line UU in FIG. FIG. 3 is an enlarged view of a main part showing a main part of the air conditioner in which one embodiment of the drain pump according to the present invention is mounted on a mounting top plate. FIG. 2A shows a state in which the motor 40 is removed from the drain pump 1 shown in FIG.

  The drainage pump 1 of the illustrated embodiment is for sucking drain water collected in a drain pan 90 and draining it to the outside of the room. The basic configuration (housing, lower cover, rotating The configuration of the blades, motors, etc.) is almost the same as the conventional drain pump 101 shown in FIGS. Therefore, the parts corresponding to the respective parts of the conventional drain pump 101 described above with reference to FIGS. 10 to 12 are denoted by the same reference numerals (reference numerals obtained by subtracting 100), and detailed description thereof will be omitted. The configuration of the mounting portion 32, which is a feature of the present invention, will be mainly described.

  The disclosure of the basic configuration of the drain pump 1 of the illustrated embodiment is incorporated in the present specification by referring to Patent Documents 1 and 2.

  The drain pump 1 of the present embodiment has a housing 10, a lower cover 20, and an upper cover 30 having the same configuration as the above-described drain pump 101 of the related art, and uses the elastic force of the snap-fit arms 11, 31. It is detachably attached by the snap fit function. Rotating blades are rotatably accommodated in the housing 10 (pump chamber), and a motor 40 is disposed inside the lower cover 20 and the upper cover 30. Leg-like mounting portions 32 arranged at irregular pitches in the circumferential direction are provided at three places near the outer periphery of the upper portion (the ceiling portion) of the upper cover 30 that covers the upper side of the motor 40 (that is, the upper portion of the drainage pump 1). It is formed by integral molding.

  In the drainage pump 1 of the present embodiment, each of the mounting portions 32 includes a substantially rectangular plate-shaped standing plate portion 33 that rises upward (vertically) from near the outer periphery of the upper portion (the ceiling portion) of the upper cover 30, and a standing plate portion 33. And a fixing plate portion 35 extending outwardly (horizontally) from the upper edge of the fixing plate 35, and the two form a substantially L-shaped cross-sectional shape. The upper surface (flat surface) of the fixing plate portion 35 is a facing surface facing the (top surface of) the mounting top plate 50 as a mounting member. An insertion hole 36 into which the fastening member 60 is inserted is formed.

  Further, a plurality of protrusions 37 protruding upward (that is, toward the mounting top plate 50) are formed around the insertion hole 36 on the upper surface of the fixed plate portion 35 by integral molding. In this example, a total of six hemispherical projections 37 are distributed (scattered) at equal angular pitches (equal angular intervals) on concentric circles around the insertion holes 36.

  Further, a pair of rib plate portions 39 each having a substantially parallelogram shape in a side view are integrally formed (integrally formed) on both sides in the circumferential direction of each mounting portion 32. More specifically, a pair of rib plate portions 39 corresponding to the respective mounting portions 32 are located at both ends in the circumferential direction of the upright plate portion 33, and each of the rib plate portions 39 is attached to the fixed plate portion 35 from the upper surface of the upper cover 30. It stands up to the position where it reaches.

  As shown in FIG. 3, the drainage pump 1 has a plurality of protrusions provided on (the upper surface of) the fixed plate portion 35 with the (upper surface) of the fixed plate portion 35 facing the (lower surface) of the mounting top plate 50. The screw 60 is passed through the insertion hole 36 and the screw 60 is provided in the mounting top plate 50 (with the 37 in direct contact with the mounting top plate 50 (the lower surface of the mounting top plate 50) (that is, without sandwiching the vibration-proof rubber or the like). ) Is fixed (fastened and fixed) to the mounting top plate 50 by screwing (tightening). That is, at this time, the upper surface of the fixed plate portion 35 is separated from the lower surface of the mounting top plate 50.

  In the drain pump 1 having such a configuration, similarly to the drain pump 101 of the conventional example described above, the mounting part 32 fixes the pump to the mounting top plate 50 of the indoor unit of the air conditioner, and the motor 40 controls the inside of the housing 10 (pump chamber). When the rotary blade accommodated in (1) is rotated, the drain water accumulated in the drain pan 90 is sucked up from the suction port 12 and discharged from the discharge port 13 through the pump chamber. The discharged drain water is drained out of the room via a pipe 13A connected to the discharge port 13.

  At this time, vibrations (vertical and horizontal vibrations) generated from the motor 40 are transmitted to the mounting portion 32, but the mounting portion 32 and the mounting top plate 50 of the indoor unit of the air conditioner are only via the protrusion 37. Partial contact (specifically, point contact at each protrusion 37) reduces the contact area between the mounting portion 32 and the mounting top plate 50 of the indoor unit of the air conditioner. Vibration propagation to the mounting top plate 50 is reduced.

  As described above, in the drainage pump 1 according to the present embodiment, the mounting portion 32 for mounting and fixing the drainage pump 1 to the mounting top plate 50 is provided with the insertion hole 36 for the screw 60 to pass through. A plurality of protrusions 37 projecting toward the mounting top plate 50 and abutting against the mounting top plate 50 are dispersedly arranged around the insertion hole 36 of the drainage pump 1. Since the contact area of the indoor unit with the mounting top plate 50 is reduced, the propagation of vibrations to the indoor unit can be effectively reduced without increasing the number of parts and the cost of the parts, so that the noise of the air conditioner Can be reduced.

  In the above embodiment, the protrusion 37 provided on the mounting portion 32 has a hemispherical shape. However, the shape of the protrusion 37 is not limited to the above embodiment, and may be, for example, a short columnar shape (see FIG. )), The shape of a truncated cone that tapers toward the upper side (the side of the mounting top plate 50) (see FIG. 4B), and the shape of a column with a fan-shaped cross section along the (concentric) circumferential direction around the insertion hole 36 (see FIG. As shown in FIG. 4C), each protrusion 37 may be brought into surface contact with the mounting top plate 50 of the indoor unit of the air conditioner. In addition, an endless annular wavy portion 38 in which peaks and valleys are alternately provided (in the circumferential direction) is protruded around the insertion hole 36 on the upper surface of the fixing plate portion 35 of the mounting portion 32, and the wavy shape is formed. The protrusion 37 may be formed by the peaks (eight peaks in the example shown in FIG. 5) of the portion 38 (see FIG. 5).

  Further, the number of the protrusions 37 provided on the mounting portion 32 is not limited to the above embodiment, and may be, for example, three (see FIG. 6).

  Further, in the above embodiment, the plurality of protrusions 37 provided on the mounting portion 32 are dispersedly arranged on a concentric circle around the insertion hole 36, but the plurality of protrusions 37 are formed around the insertion hole 36. They may be distributed on a plurality of concentric circles having different radii (see FIGS. 7A and 7B). In this case, the plurality of protrusions distributed on a certain concentric circle are arranged at the same angular position (circumferential position) with the plurality of protrusions distributed on another concentric circle, and have the same phase in the circumferential direction. Or may be arranged at different angular positions (circumferential positions) so as to have mutually different circumferential phases.

  Note that the number, arrangement, forming material, and the like of the mounting portions 32 provided on the drainage pump 1 are not limited to the above embodiment.

[Embodiment in which a projection is provided on the mounting top plate side]
FIG. 8 is an enlarged perspective view of a main part showing one embodiment of a mounting top plate as a mounting member for a drainage pump according to the present invention.

  In the embodiment described with reference to FIGS. 1 to 7, the projection 37 for preventing vibration propagation is provided on the (fixed plate portion 35) side of the attachment portion 32 of the drainage pump 1. On the other hand, in the present embodiment shown in FIG. 8, a protrusion 57 for preventing vibration propagation is provided on the mounting top plate 50 side of the indoor unit to which the mounting portion 32 of the drainage pump 1 is mounted.

  More specifically, the mounting top plate 50 is provided with a cylindrical fastening portion 55 having a screw hole (fastening hole) 56 formed with a bottomed hole or a through hole provided with a female screw to which the screw 60 is tightened. Around the screw hole 56 on the lower surface of the fastening portion 55 (the surface facing the upper surface of the fixing plate portion 35 of the mounting portion 32), a plurality of protrusions 57 protruding downward (that is, toward the mounting portion 32). It is formed by integral molding. In the present embodiment, a total of six hemispherical protrusions 57 are dispersedly arranged at equal angular pitches (equal angle intervals) on concentric circles around the screw holes 56, but the protrusions 37 are arranged on the drain pump 1 side. The various shapes and arrangements described with reference to FIGS.

  In this embodiment as well, similarly to the embodiment described with reference to FIGS. 1 to 7, the screw 60 is attached to (the fastening portion 55 of) the mounting top plate 50 to which the drainage pump 1 is mounted and fixed via the screw 60. A screw hole 56 to be fastened is provided, and projects around the screw hole 56 in the mounting top plate 50 (the fastening portion 55) toward the (the mounting portion 32) of the drainage pump 1 (the mounting portion of the drainage pump 1). 32), a plurality of projections 57 abutting on the mounting surface 32 are dispersed, and the projections 57 reduce the contact area of the mounting portion 32 of the drainage pump 1 with the mounting top plate 50 of the indoor unit. Vibration propagation to the indoor unit can be effectively reduced without increasing the cost, so that noise of the air conditioner can be reduced.

  In the embodiment illustrated in FIG. 8, the fastening portion 55 provided with the protrusion 57 has a cylindrical shape (in other words, is protruded cylindrically from the lower surface of the mounting top plate 50). However, the fastening portion 55 provided with the protrusion 57 may be provided, for example, on the lower surface of the mounting top plate 50, or may be formed slightly depressed from the lower surface of the mounting top plate 50, and the mounting portion 32 of the drainage pump 1 It may be provided in a fitting recess 58 or the like which also serves as positioning and is formed in substantially the same shape as that of FIG. 9 (see FIG. 9).

  In the above-described embodiment, the protrusions 37 and 57 are provided on one of the mounting portion 32 side of the drain pump 1 and the mounting top plate 50 side of the indoor unit. It goes without saying that the projections may be provided on both sides of the unit on the top panel 50.

  In the above-described embodiment, the projections 37 and 57 are provided on all the attachment portions 32 of the drainage pump 1 or all the fastening portions 55 of the attachment top plate 50 of the indoor unit. Needless to say, it is not necessary to provide a projection on the fastening portion 32 or the fastening portion 55 (in other words, the projection may be omitted on some of the attachment portions 32 and the fastening portion 55).

  Further, in each of the above-described embodiments, each of the plurality of protrusions 37 and 57 has the same shape, but the present invention is not limited to this, and the protrusions 37 and 57 having different shapes are mixed. It may be.

DESCRIPTION OF SYMBOLS 1 Drainage pump 10 Housing 11 Snap-fit arm 12 Suction port 13 Discharge port 13A Pipe 20 Lower cover 30 Upper cover 31 Snap-fit arm 32 Mounting part 33 Upright part 35 Fixed plate part 36 Insertion hole 37 Projection part 38 Wavy part 39 Rib plate Part 40 motor 50 mounting top plate (mounting member)
55 fastening part 56 screw hole (fastening hole)
57 Projecting part 58 Fitting concave part 60 Screw (fastening member)
90 drain pan

Claims (8)

A drain pump in which rotating blades for sucking up water and being discharged to the outside by being rotated by a motor are housed,
An attachment portion for attaching and fixing the drainage pump to an attachment member via a fastening member, wherein the attachment portion is provided with an insertion hole for passing the fastening member, and the insertion hole in the attachment portion A plurality of protrusions projecting toward the mounting member and abutting against the mounting member are dispersedly disposed around the mounting member.   The drainage pump according to claim 1, wherein the protrusion is in point contact or surface contact with the attachment member.   2. The drain pump according to claim 1, wherein the protrusion has a hemispherical shape, a cylindrical shape, a truncated cone shape, or a column shape having a sectoral cross section along a circumferential direction around the insertion hole. 3.   2. The wavy portion, in which peaks and valleys are provided alternately around the insertion hole, are provided, and the protrusions are formed by the peaks in the wavy portion. 3. The described drainage pump.   The drainage pump according to any one of claims 1 to 4, wherein the plurality of protrusions are distributed and arranged on concentric circles around the insertion hole.   5. The drain pump according to claim 1, wherein the plurality of protrusions are distributed on a plurality of concentric circles having different radii around the insertion hole. 6.   The plurality of protrusions distributed on a certain concentric circle are provided at different angular positions from the plurality of protrusions distributed on another concentric circle. Drainage pump. A mounting member to which a drainage pump containing rotating blades for sucking up water and discharging to the outside by being rotated by a motor is mounted and fixed via a fastening member,
The attachment member is provided with a fastening hole to which the fastening member is fastened, and around the fastening hole in the attachment member, a plurality of protrusions protruding toward the drain pump side and brought into contact with the drain pump. Are arranged in a distributed manner.

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