Drain pump

Abstract

The present application provides a kind of drainage pump that can effectively reduce the propagation of vibration to installation object without increasing the number of parts.The drainage pump (1) has: pump housing, the pump housing has pump chamber, the pump chamber contains rotating vane, rotates by motor (40), the rotating vane is sucked up and discharged to outside; Mounting portion (32, 34, 36), the mounting portion is used to install the upper cover (30) of pump housing to installation top plate (50) (mounting component) using threaded part (52) (fastening component);Supporting portion (22, 24, 26), the supporting portion is combined with upper cover (30);And plate portion (14), the plate portion extends along the upper surface of upper cover (30), is supported in the state separated from the upper surface in supporting portion (22, 24, 26), and is combined with mounting portion (32, 34, 36), the plate portion is configured to be capable of relatively displacing relative to upper cover (30).

Description

Technical Field

[0001] This invention relates to a drainage pump. Background Technology

[0002] For example, in the indoor unit of an air conditioner that is embedded in the ceiling, moisture in the air condenses and adheres to the heat exchanger during cooling operation. Water droplets formed by the adhered moisture drip into a drain pan located below the heat exchanger. A drain pump (also called a discharge pump) is used to drain the water accumulated in the drain pan to the outside of the indoor unit (outdoors) (see Patent Document 1).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2012-082790

[0006] However, drain pumps that use electric motors suffer from the following problem: vibrations generated by the motor are transmitted to the indoor unit of the air conditioner, which is the mounting component, causing noise and reducing quietness. Therefore, when installing the drain pump in the indoor unit, vibration-damping rubber or similar materials are placed between the drain pump mounting part and the mounting top plate of the indoor unit to reduce the transmission of vibrations.

[0007] However, in the existing drain pumps mentioned above, vibration damping rubber and the like are required between the drain pump mounting section and the mounting plate of the indoor unit, which raises concerns about an increase in the number of parts and higher component costs. In recent years, in an effort to reduce the number of parts and component costs, there has been an increasing number of cases where the drain pump (mounting section) is directly mounted on the indoor unit (mounting plate) without the vibration damping rubber and the like. In such cases, the vibration of the drain pump can sometimes be transmitted to the indoor unit and resonate, generating significant noise. Summary of the Invention

[0008] In view of the above facts, the present invention provides a drainage pump that can effectively reduce the propagation of vibration to the mounting components without increasing the number of parts.

[0009] The drainage pump according to the first method comprises: a pump housing having a pump chamber housing rotating blades that, when rotated by a motor, draw water up and discharge it to the outside; a mounting portion for mounting the pump housing to a mounting member using fastening components; a support portion coupled to the pump housing; and a plate portion extending along the upper surface of the pump housing and supported by the support portion in a state separate from the upper surface, coupled to the mounting portion, the plate portion being configured to be displaceable relative to the pump housing.

[0010] In this drainage pump, a support portion is integrated with the pump housing, and a plate extending along the upper surface of the pump housing is supported on the support portion while separated from the upper surface of the pump housing. A mounting portion for mounting the pump housing to a mounting assembly using fastening components is integrated into this plate portion. Furthermore, the plate portion is configured to be movable relative to the pump housing. Although the vibration of the drainage pump when the rotating blades are rotated by the motor is transmitted to the mounting assembly via the pump housing and the mounting portion, the presence of the plate portion between the pump housing and the mounting portion reduces the transmission of vibration to the mounting assembly compared to directly mounting the mounting portion on the pump housing.

[0011] Furthermore, since the transmission of vibration to the mounting components can be reduced through the plate in this drainage pump, there is no need to configure anti-vibration rubber or the like, thus avoiding an increase in the number of parts or the cost of parts.

[0012] The second approach involves a drainage pump in which the plate portion is formed in a ring shape along the circumference of the upper surface of the pump housing, and the support portion is provided at multiple locations.

[0013] In this drainage pump, the plate is formed in a ring shape along the circumference of the upper surface of the pump housing. Therefore, by adjusting the span of the plate between adjacent support parts, the ease of displacement of the plate can be adjusted. Thus, by adjusting the span of the plate, the propagation of vibration from the pump housing to the mounting components can be further reduced.

[0014] The third approach is that, in the drainage pump involved in the first approach, the plate portion is formed discontinuously along the circumferential direction of the upper surface of the pump housing, and the support portions are respectively disposed at both ends of the plate portion.

[0015] In this drainage pump, the plate portion that is connected to the mounting portion is formed discontinuously along the circumferential direction of the upper surface of the pump housing. Furthermore, since both ends of the plate portion are supported by the support portion, the transmission of vibration between the mounting portions is reduced compared to the case where all mounting portions are connected to a single plate portion.

[0016] The fourth approach is that, in any of the first to third approaches, the drainage pump also has a reinforcing part that connects the plate part to the central part of the pump housing.

[0017] In this drainage pump, since there is a reinforcing part that connects the plate part to the central part of the pump housing, the long-term durability of the joint between the plate part and the support part can be improved, and the long-term durability of the joint between the support part and the upper surface of the upper cover can be further improved.

[0018] The effects of the invention

[0019] The drainage pump according to the present invention can effectively reduce the propagation of vibration to the mounting components without increasing the number of parts. Attached Figure Description

[0020] Figure 1 This is a front view showing the usage state of the drainage pump involved in the first embodiment.

[0021] Figure 2 This is a perspective view of the drainage pump according to the first embodiment.

[0022] Figure 3 It is a partially enlarged sectional perspective view showing the structure of the support part.

[0023] Figure 4 This is a top view showing the drainage pump according to the first embodiment.

[0024] Figure 5 This is a perspective view showing the upper part of the drainage pump according to the second embodiment.

[0025] Figure 6 This is a perspective view showing the upper part of the drainage pump according to the third embodiment.

[0026] Figure 7 This is a perspective view showing the upper part of the drainage pump according to the fourth embodiment.

[0027] Figure 8 This is a three-dimensional view of the drainage pump involved in the comparative example.

[0028] Figure 9 It is a graph representing the test results of noise.

[0029] Explanation of symbols

[0030] 1. Drainage pump

[0031] 14. Plate section

[0032] 16. Strengthening Department

[0033] 22 Support section

[0034] 24 Support section

[0035] 26 Support section

[0036] 30 top cover

[0037] 30A Central Department

[0038] 32 Installation Department

[0039] 34 Installation Department

[0040] 36 Installation Department

[0041] 52 Threaded parts (fastening components)

[0042] 62 Plate section

[0043] 64 Plate section

[0044] 66 Plate section Detailed Implementation

[0045] [First Implementation Method]

[0046] according to Figures 1 to 4 The drainage pump 1 according to the first embodiment of the present invention will be described below. Figure 1 As shown, the drainage pump 1 in this embodiment is used to suck up the drainage W accumulated in the drainage pan 90 and discharge it outdoors. Figure 2 As shown, the drainage pump 1 includes: an upper cover 30, which is an example of a pump housing having a pump chamber; mounting parts 32, 34, and 36; support parts 22, 24, and 26; and a plate part 14.

[0047] like Figure 1 and Figure 2 As shown, the drainage pump 1 has a housing 10 made of synthetic resin, which forms a pump chamber (not shown) for housing rotating blades, a tubular suction port 12 located at the lower part of the pump chamber, and a tubular discharge port 13 extending from the pump chamber toward the side.

[0048] A cylindrical lower cover (also called a housing cover) 20 made of synthetic resin is installed on the upper part (upper opening) of the housing 10 via an O-ring (not shown) as a sealing member. The lower cover 20 is detachably installed on the housing 10 by means of a snap-fit ​​function utilizing elastic force provided on the snap-fit ​​arm 11 of the housing 10.

[0049] On the upper part of the lower cover 20, a motor 40, consisting of a stator and a rotor, is mounted so that the lead-out portion 41 for leading out the lead wire 41A is exposed to the outside. The drive shaft of the motor 40 is connected to the rotation shaft of the rotating blades disposed in the pump chamber.

[0050] A short, cylindrical synthetic resin upper cover (also called a motor cover) 30 with a top is installed on the upper part (upper opening) of the lower cover 20, covering the upper side of the motor 40. The upper cover 30 is detachably installed on the lower cover 20 by means of a snap-fit ​​function utilizing elastic force provided on the snap-fit ​​arm 31 of the upper cover 30.

[0051] like Figure 1 , Figure 2 As shown, foot-shaped mounting portions 32, 34, and 36 are integrally formed on the upper part (top) of the upper cover 30. These mounting portions 32, 34, and 36 are locations for mounting the upper cover 30 to a mounting top plate 50, which is an example of a mounting component, using a threaded member 52 as an example of a fastening component.

[0052] A through hole 54 for inserting a threaded member 52 is formed in the fixing plate portion 46 extending horizontally outward from the upper end of the mounting portions 32, 34, and 36. The drain pump 1 is fixed (securely fixed) to the mounting top plate 50 by threading (tightening) the threaded member 52, which passes through the through hole 54, to the mounting top plate 50 (the threaded hole provided on it).

[0053] The drain pump 1 is fixed to the mounting top plate 50 of the indoor unit of the air conditioner via mounting parts 32, 34, and 36. When the rotating blades housed in the housing 10 (pump chamber) are rotated by the motor 40, the drain W accumulated in the drain pan 90 is drawn up from the suction port 12 and discharged from the discharge port 13 through the pump chamber. After being discharged, the drain W is temporarily guided upwards via the piping 13A connected to the discharge port 13, and then guided sideways to be discharged outdoors.

[0054] (Installation Department)

[0055] exist Figure 2 In this design, mounting parts 32, 34, and 36 are designed with approximately the same structure. Hereinafter, the structure of mounting part 32 will be described as representative.

[0056] The mounting portion 32 includes a foot portion 28 and a fixing plate portion 46. The foot portion 28 extends vertically from the plate portion 14 toward the mounting top plate 50 located above it, and the fixing plate portion 46 extends outward (horizontally) from the upper end of the foot portion 28.

[0057] (Support section and plate section)

[0058] exist Figures 1 to 4 In the middle, the support portions 22, 24, and 26 are combined with the upper cover 30. The plate portion 14 extends along the upper surface of the upper cover 30, is supported by the support portions 22, 24, and 26 in a state separated from the upper surface, and is combined with the mounting portions 32, 34, and 36. The plate portion 14 is configured to be able to move relative to the upper cover 30, for example, through elastic deformation.

[0059] Specifically, the upper cover 30 is, for example, a resin molded article, and multiple (e.g., three) support portions 22, 24, 26, plate portion 14, and three mounting portions 32, 34, 36 are integrally formed on the upper cover 30. In other words, the upper cover 30 is integrally formed together with the support portions 22, 24, 26, plate portion 14, and mounting portions 32, 34, 36. The support portions 22, 24, 26 are positioned to avoid the mounting portions 32, 34, 36. As a result, 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.

[0060] The plate portion 14 is formed in a ring shape (e.g., annular) along the circumferential direction on the upper surface of the upper cover 30, for example, at its peripheral edge. Furthermore, 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, equal to the outer diameter of the upper cover 30.

[0061] like Figure 3 , Figure 4 As shown, the support portion 22 is formed, for example, in a roughly U-shaped manner on a cross section (horizontal section) orthogonal to the axial direction of the upper cover 30, opening upwards to the outer side of the upper cover 30. Figure 4 As shown, support portion 24, like support portion 22, is shaped to be approximately U-shaped when viewed from above. Support portion 26 is shaped to be approximately L-shaped when viewed from above in order to prevent undercutting during demolding in resin molding. However, the shapes of supports 22, 24, and 26 are not limited to these.

[0062] The plate portion 14 and the central portion 30A of the upper cover 30 are joined, for example, by three reinforcing portions 16. The central portion 30A of the upper cover 30 is, for example, cylindrically raised to internally support the upper end of the drive shaft of the motor 40. The reinforcing portions 16 are, for example, spokes that join the outer periphery of the central portion 30A of the upper cover 30 to the inner periphery of the plate portion 14, and extend radially in the upper cover 30 when viewed from above. Figure 4 Furthermore, the reinforcing part 16 can also be separated from the upper surface of the upper cover 30 in the same way as the plate part 14.

[0063] (Function, Effect)

[0064] Next, the function and effects of the drainage pump 1 in this embodiment will be explained.

[0065] exist Figure 1 In this embodiment, the mounting portions 32, 34, and 36 of the drainage pump 1 are fixed to the mounting top plate 50 of the indoor unit of the air conditioner. When the rotating blades housed within the housing 10 (pump chamber) are rotated by a motor, the drainage accumulated in the drainage pan 90 is drawn up from the suction port 12 and discharged through the pump chamber from the discharge port 13. The discharged drainage W is then discharged outdoors via a piping 13A connected to the discharge port 13.

[0066] At this time, the vibration generated by the motor 40 will be transmitted to the mounting parts 32, 34, and 36 via the upper cover 30, but the vibration will be reduced by the mounting parts 32, 34, and 36 as follows before propagating to the mounting top plate 50.

[0067] In this drainage pump 1, support portions 22, 24, and 26 are connected to the upper cover 30, and a plate portion 14 extending along the upper surface of the upper cover 30 is supported by the support portions 22, 24, and 26 in a state separated from the upper surface of the upper cover 30. Mounting portions 32, 34, and 36 are incorporated in the plate portion 14 for mounting the upper cover 30 to the mounting top plate 50 using fastening components. Furthermore, the plate portion 14 is configured to be movable relative to the upper cover 30.

[0068] The vibration of the drain pump 1, generated by the rotating blades of the motor 40, is transmitted to the mounting plate 50 via the upper cover 30 and the mounting portions 32, 34, and 36. However, in this embodiment, a plate portion 14, which can be displaced relative to the upper cover 30, exists between the upper cover 30 and the mounting portions 32, 34, and 36. Therefore, compared to the case where the mounting portions 32, 34, and 36 are directly provided on the upper cover 30, the transmission of vibration to the mounting plate 50 can be reduced. Furthermore, this reduces the noise of the air conditioner.

[0069] In addition, the transmission of vibration to the mounting plate 50 can be reduced by the plate 14 in this drainage pump. Therefore, there is no need to configure anti-vibration rubber or the like, and the number of parts and the cost of parts will not increase.

[0070] Furthermore, since the plate portion 14 is formed in a ring shape along the circumference of the upper surface of the upper cover 30, the ease of displacement of the plate portion 14 can be adjusted by adjusting the span of the plate portion 14 between adjacent support portions 22, 24, and 26. Therefore, by adjusting the span of the plate portion 14, vibration from the upper cover 30 to the mounting top plate 50 can be further reduced. Figure 1 The spread of ).

[0071] Furthermore, since the reinforcing portion 16 is provided to connect the plate portion 14 to the central portion 30A of the upper cover 30, the long-term durability of the joint portion between the plate portion 14 and the support portions 22, 24, 26 can be improved, and the long-term durability of the joint portion between the support portions 22, 24, 26 and the upper surface of the upper cover 30 can be further improved.

[0072] Thus, according to this embodiment, vibration propagation from the drainage pump 1 to the mounting plate 50 can be effectively reduced without increasing the number of parts.

[0073] [Second Implementation]

[0074] exist Figure 5 In this document, the drainage pump 1 according to the second embodiment will be described. Furthermore, structures identical to those in the first embodiment will be labeled with the same symbols, and their descriptions will be omitted.

[0075] like Figure 2 , Figure 4As shown, in the first embodiment, the plate portion 14 and the central portion 30A of the upper cover 30 are joined by three reinforcing portions 16, but as Figure 5 As shown, the reinforcing part 16 is omitted in this embodiment. The reinforcing part 16 can also be omitted as long as the long-term durability of the joint between the plate part 14 and the support parts 22, 24, 26 can be ensured.

[0076] By omitting the reinforcing part 16, the plate part 14 is more easily displaced, thus further suppressing the flow from the drain pump 1 to the mounting top plate 50. Figure 1 The vibration propagation of ).

[0077] [Third Implementation Method]

[0078] exist Figure 6 In this document, the drainage pump 1 according to the third embodiment will be described. Furthermore, structures identical to those in the first embodiment will be labeled with the same symbols, and their descriptions will be omitted.

[0079] In this embodiment, plate portions 62, 64, and 66 are formed discontinuously, for example, at three locations along the circumferential direction of the upper surface of the upper cover 30. In other words, plate portions 62, 64, and 66 are formed into an arc shape when viewed from above, and are provided at positions corresponding to mounting portions 32, 34, and 36. Specifically, mounting portion 32 is provided on plate portion 62, mounting portion 34 is provided on plate portion 64, and mounting portion 36 is provided on plate portion 66.

[0080] Support portions 62A, 64A, and 66A are respectively provided at both ends of the plates 62, 64, and 66. The support portions 62A, 64A, and 66A are combined with the upper cover 30. That is, the plates 62, 64, and 66 are supported at both ends of the upper cover 30 by the support portions 62A, 64A, and 66A. The boundaries between the plates 62, 64, and 66 and the support portions 62A, 64A, and 66A are respectively bent into, for example, arc shapes. The upper cover 30, the support portions 62A, 64A, and 66A, the plates 62, 64, and 66, and the mounting portions 32, 34, and 36 are integrally formed together.

[0081] In this embodiment, there are plate portions 62, 64, and 66 between the upper cover 30 and the mounting portions 32, 34, and 36, which can be relatively displaced relative to the upper cover 30, for example, through elastic deformation. Therefore, compared to the case where the mounting portions 32, 34, and 36 are directly provided on the upper cover 30, vibration towards the mounting top plate 50 can be reduced. Figure 1 The propagation of ( ). In addition, this can reduce the noise of the air conditioner.

[0082] Furthermore, in this embodiment, the plate portions 62, 64, and 66 that are coupled with the mounting portions 32, 34, and 36 are formed discontinuously along the circumferential direction of the upper surface of the upper cover 30. Additionally, both ends of the plate portions 62, 64, and 66 are supported by support portions 62A, 64A, and 66A. Therefore, compared to the cases where all mounting portions 32, 34, and 36 are coupled to an annular plate portion 14 as in the first and second embodiments, the transmission of vibration between the mounting portions 32, 34, and 36 can be reduced.

[0083] [Fourth Implementation Method]

[0084] exist Figure 7 In this document, the drainage pump 1 according to the fourth embodiment will be described. Furthermore, structures identical to those in the first embodiment will be labeled with the same symbols, and their descriptions will be omitted.

[0085] In this embodiment, based on the third embodiment, three reinforcing parts 16 are further provided to connect the plate portions 62, 64, and 66 to the central portion 30A of the upper cover 30. The plate portions 62, 64, and 66 are connected to the central portion 30A of the upper cover 30 via the three reinforcing parts 16.

[0086] The reinforcement 16 improves the long-term durability of the joints between the plates 62, 64, 66 and the supports 62A, 64A, 66A, and further improves the long-term durability of the joints between the supports 62A, 64A, 66A and the upper surface of the cover 30.

[0087] [Experimental Example]

[0088] To confirm the effectiveness of this embodiment, a comparative example drainage pump and the drainage pump of this embodiment were prepared, and the noise reduction effect was confirmed. Figure 8 The comparative example drainage pump 101 is shown. Furthermore, structures identical to those in the above-described embodiments are labeled with the same reference numerals, and their descriptions are omitted. The drainage pump 1 according to the first embodiment is used as the drainage pump in this embodiment.

[0089] In the comparative example drain pump 101, mounting portions 132, 134, and 136 with different shapes than those used in the above embodiments are provided instead of mounting portions 32, 34, and 36. The lower ends of each mounting portion 132, 134, and 136 are engaged with the upper surface of the upper cover 30. A fixing plate portion 46 is provided on the upper side of the mounting portions 132, 134, and 136.

[0090] The comparative example drain pump 101 used in the test and the drain pump 1 of the first embodiment both have a top cover and a mounting part formed of resin. In addition, the thickness of the ribs in the mounting part is all set to the same dimension.

[0091] The test involved mounting the drain pump on the top plate and measuring the noise of the drive motor using a noise meter. Figure 9 In the chart, the vertical axis represents the noise level, and the horizontal axis represents the noise frequency.

[0092] according to Figure 9 The test results shown indicate that by using the drainage pump implemented according to the embodiments of the present invention, the noise level can be reduced compared to the case of using the drainage pump of the comparative example.

[0093] [Other Implementation Methods]

[0094] The above describes one embodiment of the present invention, but the present invention is not limited to the above content. Of course, various modifications can be made without departing from the spirit of the present invention.

Claims

1. A drainage pump, characterized in that, have: The pump housing has a pump chamber that houses rotating blades. The rotating blades, rotated by a motor, draw water up and discharge it to the outside. Multiple mounting parts are provided for mounting the pump housing to the mounting parts using fastening components; Support portion, which is combined with the pump housing; as well as A plate portion extending along the upper surface of the pump housing, supported by the support portion in a state separate from the upper surface, and engaged with the mounting portion, the plate portion being configured to be displaceable relative to the pump housing. The drive shaft of the motor extends in the vertical direction. The rotating blade is connected to the lower part of the drive shaft. The plate portion is formed discontinuously along the circumferential direction of the upper surface of the pump housing. The supporting portions are respectively disposed at both ends of the plate. The plurality of mounting portions are positioned on the plate portion away from the support portion.

2. The drainage pump according to claim 1, characterized in that, It also has a reinforcing section that connects the plate portion to the central portion of the pump housing.

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