JP2022115796A - drainage pump - Google Patents

Abstract

To provide a drainage pump that can effectively reduce propagation of vibration to a fitting object without increasing the number of components.SOLUTION: A drainage pump 1 comprises a pump case comprising a pump chamber in which rotor blades for sucking up water and discharging it to the outside by being rotated by a motor 40 are housed, fitting parts 32, 34, and 36 for fitting an upper cover 30 of the pump case to a fitting top plate (fitting member) by using screws (fastening members), supporting parts 22 and 24 connected to the upper cover 30, and a plate part 14 extending along an upper surface of the upper cover 30, supported by the supporting parts 22 and 24 while being separated from the upper surface, to which the fitting parts 32, 34, and 36 are connected, and constituted so as to be relatively displaceable with respect to the upper cover 30.SELECTED DRAWING: Figure 2

Description

The present invention relates to drainage pumps.

For example, in an indoor unit of an air conditioner that is embedded in the ceiling of a room, moisture in the air condenses and adheres to the heat exchanger during cooling operation, and the water droplets generated by the adhered moisture spread below the heat exchanger. drops into a drain pan provided in the A drainage pump (also referred to as a drain pump) is used to discharge the drain water accumulated in the drain pan to the outside of the indoor unit (outdoor) (see Patent Document 1).

JP 2012-082790 A

By the way, in a drainage pump using a motor, the vibration generated by the motor may be transmitted to the indoor unit of the air conditioner as a mounting member, generating noise and deteriorating quietness. Therefore, when the drain pump is attached to the indoor unit, anti-vibration rubber or the like is arranged between the attachment portion of the drain pump and the attachment top plate of the indoor unit to reduce the propagation of vibration.

However, with the above-mentioned conventional drain pump, it is necessary to place anti-vibration rubber or the like between the mounting portion of the drain pump and the mounting top plate of the indoor unit. be. In recent years, in order to reduce the number of parts and the cost of parts, there is an increasing number of cases where the drainage pump (mounting part) is directly attached to the indoor unit (mounting top plate) without using anti-vibration rubber. Vibration of the pump propagates to the indoor unit, causing resonance and loud noise.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a drainage pump capable of effectively reducing vibration propagation to mounting members without increasing the number of parts.

A drainage pump according to a first aspect includes a pump housing having a pump chamber in which a rotating vane that sucks up water and discharges it to the outside by being rotated by a motor is housed, and a fastening member is used to hold the pump housing together. a mounting portion for mounting to a mounting member; a support portion coupled to the pump housing; and a plate portion configured to be relatively displaceable with respect to the pump housing.

In this drainage pump, the support portion is coupled to the pump housing, and the plate portion extending along the upper surface of the pump housing is supported by the support portion while being separated from the upper surface of the pump housing. A mounting portion for mounting the pump housing to the mounting member is coupled to the plate portion using a fastening member. Furthermore, the plate portion is configured to be relatively displaceable with respect to the pump housing. Vibration of the drainage pump when the rotary blades are rotated by the motor is transmitted to the mounting member via the pump housing and the mounting portion, but the plate portion is interposed between the pump housing and the mounting portion. Therefore, propagation of vibration to the mounting member can be reduced compared to the case where the mounting portion is directly provided on the pump housing.

In addition, in this drain pump, since the plate portion can reduce the propagation of vibration to the mounting member, there is no need to dispose anti-vibration rubber or the like, and the number of parts and the cost of parts do not increase.

A second aspect is the drainage pump according to the first aspect, wherein the plate portion is annularly formed along the circumferential direction of the upper surface of the pump casing, and the support portions are provided at a plurality of locations. .

In this drainage pump, the plate portion is formed in a ring shape along the circumferential direction of the upper surface of the pump housing. You can adjust the ease. Therefore, by adjusting the span of the plate portion, it is possible to further reduce the propagation of vibration from the pump housing to the mounting member.

A third aspect is the drainage pump according to the first aspect, wherein the plate portion is intermittently formed along the circumferential direction of the upper surface of the pump housing, and the support portions are provided at both ends of the plate portion. are provided in each.

In this drainage pump, the plate portion to which the mounting portion is coupled is intermittently formed along the circumferential direction of the upper surface of the pump housing. Also, both ends of the plate portion are supported by the support portions. Therefore, transmission of vibration between the mounting portions can be reduced compared to the case where all the mounting portions are coupled to one plate portion.

A fourth aspect is the drainage pump according to any one of the first to third aspects, further comprising a reinforcing portion that joins the plate portion and the central portion of the pump housing.

Since this drainage pump has a reinforcing portion that connects the plate portion and the central portion of the pump housing, the connection portion between the plate portion and the support portion and the connection portion between the support portion and the upper surface of the upper cover are can enhance the long-term durability of

ADVANTAGE OF THE INVENTION According to the drainage pump of this invention, the vibration propagation to an attachment member can be reduced effectively, without increasing a number of parts.

It is a front view which shows the use condition of the drainage pump which concerns on 1st Embodiment. 1 is a perspective view showing a drainage pump according to a first embodiment; FIG. FIG. 4 is a partially cutaway enlarged perspective view showing the configuration of the supporting portion; It is a top view which shows the drainage pump which concerns on 1st Embodiment. It is a perspective view which shows the upper part of the drainage pump which concerns on 2nd Embodiment. It is a perspective view which shows the upper part of the drainage pump which concerns on 3rd Embodiment. It is a perspective view which shows the upper part of the drainage pump which concerns on 4th Embodiment. It is a perspective view showing a drainage pump according to a comparative example. It is a graph which shows the test result of a noise.

[First Embodiment]
A drainage pump 1 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG. As shown in FIG. 1, the drainage pump 1 of the embodiment is for sucking up the drain water W accumulated in the drain pan 90 and discharging it to the outside. As shown in FIG. 2, the drainage pump 1 includes an upper cover 30 as an example of a pump housing having a pump chamber, mounting portions 32, 34 and 36, support portions 22, 24 and 26, and a plate portion 14. and has.

As shown in FIGS. 1 and 2, the drainage pump 1 includes a pump chamber (none of which is shown) that accommodates rotary vanes, a tubular suction port 12 provided at the bottom of the pump chamber, and a suction port 12 on the side of the pump chamber. It comprises a synthetic resin housing 10 formed with a tubular outlet 13 extending in the direction.

A cylindrical synthetic resin lower cover (also referred to as a housing cover) 20 is attached to the upper portion (upper opening) of the housing 10 via an O-ring (not shown) as a sealing member. The lower cover 20 is detachably attached to the housing 10 by a snap fit function utilizing the elastic force of the snap fit arms 11 provided on the housing 10 .

A motor 40 composed of a stator, a rotor, and the like is mounted on the upper portion of the lower cover 20 so that a lead wire lead-out portion 41 for leading the lead wire 41A is exposed to the outside. The drive shaft of the motor 40 is connected to the rotating shaft of the rotary vane arranged inside the pump chamber.

A short cylindrical synthetic resin upper cover (also referred to as a motor cover) 30 with a ceiling that covers the upper side of the motor 40 is attached to the upper portion (upper opening) of the lower cover 20 . The upper cover 30 is detachably attached to the lower cover 20 by a snap-fit function utilizing the elastic force of snap-fit arms 31 provided on the upper cover 30 .

As shown in FIGS. 1 and 2, leg-like mounting portions 32 , 34 , 36 are integrally formed on the upper portion (ceiling portion) of the upper cover 30 . The mounting portions 32 , 34 , 36 are portions for mounting the upper cover 30 to a mounting top plate 50 as an example of a mounting member in the indoor unit using screws 52 as an example of a fastening member.

An insertion hole 54 into which a screw 52 is inserted is formed in the fixing plate portion 46 extending horizontally outward from the upper ends of the mounting portions 32 , 34 , 36 . The drain pump 1 is fixed (fixed by fastening) to the mounting top plate 50 by screwing (tightening) the screws 52 passed through the insertion holes 54 into (the screw holes provided in) the mounting top plate 50 .

The drainage pump 1 is fixed to the mounting top plate 50 of the indoor unit of the air conditioner by the mounting portions 32, 34, and 36, and the rotary vanes housed in the housing 10 (pump chamber) are rotated by the motor 40. Then, the drain water W 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 W is once guided upward through a pipe 13A connected to the discharge port 13, and then guided laterally and discharged to the outside of the room.

(Mounting part)
In FIG. 2, the attachment portions 32, 34, and 36 have substantially the same configuration, and the configuration of the attachment portion 32 will be described below as a representative.

The mounting portion 32 includes a leg portion 28 extending vertically from the plate portion 14 toward a mounting top plate 50 positioned above the plate portion 14 and extending outward (horizontally) from the upper end portion of the leg portion 28 . A fixed plate portion 46 is provided.

(Support part and plate part)
1-4, the supports 22, 24, 26 are coupled to the top cover 30. As shown in FIG. The plate portion 14 extends along the upper surface of the upper cover 30 , is supported by the support portions 22 , 24 , 26 while being spaced apart from the upper surface, and is connected to the mounting portions 32 , 34 , 36 so as to be attached to the upper cover 30 . , for example, are configured to be relatively displaceable by elastic deformation.

Specifically, the upper cover 30 is, for example, a resin molded product, and the plurality of (for example, three) support portions 22, 24, and 26, the plate portion 14, and the three mounting portions 32, 34, and 36 are also included in the upper cover 30. is integrally formed. In other words, the upper cover 30 is formed integrally with the support portions 22, 24, 26, the plate portion 14, and the mounting portions 32, 34, 36. As shown in FIG. The support portions 22 , 24 , 26 are provided so as to avoid the positions of the mounting portions 32 , 34 , 36 . Accordingly, the plate portion 14 is separated from the upper surface of the upper cover 30 at the positions of the mounting portions 32 , 34 , 36 .

The plate portion 14 is formed in an annular shape (for example, an annular shape) along the circumferential direction, for example, at the peripheral portion of the upper surface of the upper cover 30 . Further, the plate portion 14 is formed concentrically with the upper cover 30, for example. The outer diameter of the plate portion 14 is, for example, the same as the outer diameter of the upper cover 30 .

As shown in FIGS. 3 and 4, the support portion 22 is formed, for example, in a substantially U-shape opening to the outside of the upper cover 30 in a cross section perpendicular to the axial direction of the upper cover 30 (horizontal cross section). there is As shown in FIG. 4, the support portion 24 is also formed in a substantially U shape in a plan view, similarly to the support portion 22. As shown in FIG. The support portion 26 is formed in a substantially L shape in a plan view so as not to cause an undercut during die-cutting during resin molding. The shape of the support portions 22, 24, 26 is not limited to this.

The plate portion 14 and the central portion 30A of the upper cover 30 are coupled by three reinforcing portions 16, for example. A central portion 30A of the upper cover 30 is protruded, for example, in a cylindrical shape to support the upper end of the drive shaft of the motor 40 inside. The reinforcing portion 16 is, for example, a spoke that connects the outer peripheral portion of the central portion 30A of the upper cover 30 and the inner peripheral portion of the plate portion 14, and extends in the radial direction of the upper cover 30 in plan view (FIG. 4). . Note that the reinforcing portion 16 may be separated from the upper surface of the upper cover 30 in the same manner as the plate portion 14 .

(action, effect)
Next, the operation and effects of the drainage pump 1 of this embodiment will be described.

In FIG. 1, the mounting portions 32, 34, and 36 of the drainage pump 1 of the present embodiment are fixed to the mounting top plate 50 of the indoor unit of the air conditioner, and the rotary vane accommodated in the housing 10 (pump chamber) is the motor. , 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 W is drained outside the room through a pipe 13A connected to the discharge port 13 .

At this time, vibrations generated by the motor 40 are transmitted to the mounting portions 32, 34, 36 through the upper cover 30, but the vibrations are reduced through the mounting portions 32, 34, 36 as follows. Propagated to the top plate 50 .

In this drainage pump 1 , the support portions 22 , 24 , 26 are coupled to the upper cover 30 , and the plate portion 14 extending along the upper surface of the upper cover 30 is separated from the upper surface of the upper cover 30 and connected to the support portions 22 , 24 . , 26. Mounting portions 32, 34, and 36 for mounting the upper cover 30 to the mounting top plate 50 are coupled to the plate portion 14 using fastening members. Further, the plate portion 14 is configured to be relatively displaceable with respect to the upper cover 30 .

Vibration of the drainage pump 1 when the rotary blades are rotated by the motor 40 is transmitted to the mounting top plate 50 via the upper cover 30 and the mounting portions 32 , 34 , 36 . However, in this embodiment, the plate portion 14 is interposed between the upper cover 30 and the mounting portions 32 , 34 , 36 so as to be relatively displaceable with respect to the upper cover 30 . Therefore, compared with the case where the mounting portions 32 , 34 , 36 are directly provided on the upper cover 30 , propagation of vibration to the mounting top plate 50 can be reduced. Also, this can reduce the noise of the air conditioner.

Further, in this drainage pump, since the plate portion 14 can reduce the propagation of vibration to the mounting top plate 50, there is no need to dispose anti-vibration rubber or the like, and the number of parts and the cost of parts do not increase.

Furthermore, since the plate portion 14 is formed in an annular shape along the circumferential direction of the upper surface of the upper cover 30, by adjusting the span of the plate portion 14 between the mutually adjacent support portions 22, 24, 26, the plate portion The easiness of displacement of 14 can be adjusted. Therefore, by adjusting the span of the plate portion 14, it is possible to further reduce the propagation of vibration from the upper cover 30 to the mounting top plate 50 (FIG. 1).

Further, since the reinforcing portion 16 that connects the plate portion 14 and the central portion 30A of the upper cover 30 is provided, the connecting portion between the plate portion 14 and the support portions 22, 24, 26, and further the support portions 22, 24 , 26 and the upper surface of the upper cover 30 can be enhanced in long-term durability.

Thus, according to this embodiment, it is possible to effectively reduce the vibration propagation from the drainage pump 1 to the mounting top plate 50 without increasing the number of parts.

[Second embodiment]
A drainage pump 1 according to a second embodiment will be described with reference to FIG. In addition, the same code|symbol is attached|subjected to the same structure as 1st Embodiment, and the description is abbreviate|omitted.

As shown in FIGS. 2 and 4, in the first embodiment, the plate portion 14 and the central portion 30A of the upper cover 30 are connected by three reinforcing portions 16, but as shown in FIG. In this embodiment, the reinforcing portion 16 is omitted. If the long-term durability of the connecting portions between the plate portion 14 and the support portions 22, 24, 26 can be ensured, the reinforcing portion 16 may be omitted in this way.

Omitting the reinforcing portion 16 makes it easier for the plate portion 14 to be displaced, thereby further suppressing the propagation of vibration from the drain pump 1 to the mounting top plate 50 (FIG. 1).

[Third embodiment]
A drainage pump 1 according to a third embodiment will be described with reference to FIG. In addition, the same code|symbol is attached|subjected to the same structure as 1st Embodiment, and the description is abbreviate|omitted.

In this embodiment, the plate portions 62 , 64 , 66 are formed intermittently along the circumferential direction of the upper surface of the upper cover 30 , for example, at three locations. In other words, the plate portions 62 , 64 , 66 are arc-shaped in plan view and provided at locations corresponding to the mounting portions 32 , 34 , 36 . Specifically, the mounting portion 32 is provided on the plate portion 62 , the mounting portion 34 is provided on the plate portion 64 , and the mounting portion 36 is provided on the plate portion 66 .

Support portions 62A, 64A and 66A are provided at both ends of the plate portions 62, 64 and 66, respectively. The support portions 62A, 64A, 66A are coupled to the upper cover 30. As shown in FIG. That is, the plate portions 62 , 64 , 66 are supported at both ends by the support portions 62 A, 64 A, 66 A on the upper surface of the upper cover 30 . Boundaries between the plate portions 62, 64, 66 and the support portions 62A, 64A, 66A are each curved, for example, in an arc shape. The upper cover 30 is formed integrally with the supporting portions 62A, 64A, 66A, the plate portions 62, 64, 66 and the mounting portions 32, 34, 36. As shown in FIG.

In this embodiment, plate portions 62 , 64 , 66 are interposed between the upper cover 30 and the mounting portions 32 , 34 , 36 so as to be displaceable relative to the upper cover 30 by, for example, elastic deformation. . Therefore, compared with the case where the mounting portions 32, 34, 36 are directly provided on the upper cover 30, the propagation of vibration to the mounting top plate 50 (FIG. 1) can be reduced. Also, this can reduce the noise of the air conditioner.

Furthermore, in this embodiment, the plate portions 62 , 64 , 66 to which the mounting portions 32 , 34 , 36 are coupled are intermittently formed along the circumferential direction of the upper surface of the upper cover 30 . Both ends of the plate portions 62, 64, 66 are supported by support portions 62A, 64A, 66A. For this reason, compared to the case where all the mounting portions 32, 34, 36 are combined with one annular plate portion 14 as in the first and second embodiments, the mounting portions 32, 34, 36 are can reduce the transmission of vibrations between

[Fourth embodiment]
A drainage pump 1 according to a fourth embodiment will be described with reference to FIG. In addition, the same code|symbol is attached|subjected to the same structure as 1st Embodiment, and the description is abbreviate|omitted.

In this embodiment, in addition to the third embodiment, three reinforcing portions 16 that connect the plate portions 62, 64, 66 and the central portion 30A of the upper cover 30 are provided. The plate portions 62 , 64 , 66 are each connected to the central portion 30 A of the upper cover 30 by one reinforcing portion 16 .

The reinforcing portion 16 ensures long-term durability of the connecting portions between the plate portions 62, 64, and 66 and the supporting portions 62A, 64A, and 66A, as well as the connecting portions between the supporting portions 62A, 64A, and 66A and the upper surface of the upper cover 30. can enhance sexuality.

[Test example]
In order to confirm the effect of this embodiment, a drainage pump of a comparative example and a drainage pump of this embodiment were prepared, and the noise reduction effect was confirmed. FIG. 8 shows a drainage pump 101 of a comparative example. In addition, the same code|symbol is attached|subjected to the same structure as embodiment mentioned above, and the description is abbreviate|omitted. As the drainage pump of this embodiment, the drainage pump 1 according to the first embodiment is used.

In the drainage pump 101 of the comparative example, instead of the mounting portions 32, 34, and 36 used in the above-described embodiment, mounting portions 132, 134, and 136 having shapes different from those of the mounting portions 32, 34, and 36 are provided. there is The mounting portions 132 , 134 , 136 are coupled to the upper surface of the upper cover 30 at their lower ends. A fixing plate portion 46 is provided on upper side portions of the mounting portions 132 , 134 , 136 .

Both the drain pump 101 of the comparative example and the drain pump 1 of the first embodiment used in the test have an upper cover and a mounting portion made of resin. In addition, the thickness of the ribs of the mounting portion was all the same dimension.

In the test, the drainage pump was attached to the mounting top plate, and the noise when the motor was driven was measured using a sound level meter. In the graph of FIG. 9, the vertical axis indicates the noise level, and the horizontal axis indicates the noise frequency.

From the test results shown in FIG. 9, it can be seen that the noise level can be reduced by using the drainage pump of the embodiment to which the present invention is applied, compared to the case of using the drainage pump of the comparative example.

[Other embodiments]
Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and it goes without saying that various modifications can be made in addition to the above without departing from the scope of the invention. is.

1 drainage pump 14 plate portion 16 reinforcement portion 22 support portion 24 support portion 26 support portion 30 upper cover 30A central portion 32 mounting portion 34 mounting portion 36 mounting portion 52 screw (fastening member)
62 plate portion 64 plate portion 66 plate portion

Claims (4)

a pump housing having a pump chamber containing a rotating vane that sucks up water and discharges it to the outside by being rotated by a motor;
a mounting portion for mounting the pump housing to a mounting member using a fastening member;
a support coupled to the pump housing;
A plate portion that extends along the top surface of the pump housing, is supported by the support portion while being separated from the top surface, is coupled to the mounting portion, and is configured to be relatively displaceable with respect to the pump housing. When,
Drainage pump with. the plate portion is formed in an annular shape along the circumferential direction of the upper surface of the pump housing;
2. The drainage pump according to claim 1, wherein said support portions are provided at a plurality of locations. The plate portion is intermittently formed along the circumferential direction of the upper surface of the pump housing,
2. The drainage pump according to claim 1, wherein said support portions are provided at both ends of said plate portion. 4. The drainage pump according to any one of claims 1 to 3, further comprising a reinforcing portion that joins the plate portion and the central portion of the pump housing.

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