JP2018091190A - Drain pump and air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drain pump which enables simplification of a structure and reduction of assembly work hours, and to provide an air conditioner.SOLUTION: A drain pump 1 includes: a pump chamber case (a pump body) 2 having a pump chamber 22; a lid case (a lid member) 3 which contacts with the pump chamber case 2 to close the pump chamber 22; a motor part (a driving part) 4 which is supported by the lid case 3 and drives an impeller 21; and an upper cover (a cover member) 5 which covers the motor part 4 and is attached to an attachment object part. An elastic engagement piece 55 is provided in at least one of the pump chamber case 2 and the upper cover 5, and an engagement receiving part 25 is provided at the other. The elastic engagement piece 55 is engaged with the engagement receiving part 25 with the lid case 3 and the motor part 4 sandwiched between the pump chamber case 2 and the upper cover 5 to integrally assemble the drain pump 1.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a drainage pump and an air conditioner.

  Conventionally, a pump housing (pump main body) having a pump chamber, a housing cover (lid portion) covering an opening of the pump housing, a motor (driving portion) provided on an upper portion of the housing cover, and a motor cover (cover) covering the motor A drainage pump including a member is known (see, for example, Patent Document 1). This drainage pump is arranged from the bottom to the top in the order of pump housing, housing cover, motor, motor cover, the pump housing is attached to the housing cover by a snap fit function, and the motor cover is attached to the housing cover. It is attached by the snap fit function.

JP 2014-105599 A

  However, in the conventional drainage pump as described in Patent Document 1, the pump housing has two snap fit arms, the motor cover has two snap fit arms, and these four snap fit arms in total. Four receiving portions are provided on the housing cover corresponding to the arms. For this reason, the structure of the conventional drainage pump is complicated, and it is necessary to engage four snap fits at the time of assembly, so that the number of steps in the assembly process increases.

  The objective of this invention is providing the drainage pump and air conditioner which can simplify a structure and can reduce an assembly man-hour.

  The drainage pump according to the present invention includes a pump body having a pump chamber that houses an impeller, a lid member that contacts the pump body and closes the pump chamber, and is supported by the lid member to drive the impeller. A drive member, and a cover member that covers the drive unit and is attached to the attachment target portion. One of the pump body and the cover member is provided with an elastic engagement piece, and the other is an engagement receiver. And a unit is assembled by engaging an elastic engagement piece with an engagement receiving portion with the lid member and the drive portion sandwiched between the pump main body and the cover member. .

  According to the present invention, since the elastic engagement piece is engaged with the engagement receiving portion with the lid member and the drive portion sandwiched between the pump body and the cover member, the elastic engagement piece is integrated. It is possible to simplify the structure by reducing the number of pieces and engagement receiving portions installed, and to reduce the number of assembly steps. In addition, since the pump body and the cover member are engaged by the elastic engagement piece and the engagement receiving portion with the lid member and the drive portion interposed therebetween, even if the overall size of the drainage pump is reduced, the elastic engagement The length (arm length) required for bending the combined piece can be ensured, and the assemblability can be improved while ensuring the engagement strength.

  In this case, it is preferable that the lid member is provided with a guide portion that slides and guides the engagement receiving portion.

  According to this configuration, the engagement receiving portion can be positioned at a predetermined position while the pump body and the lid member are positioned by sliding the engagement receiving portion with the guide portion provided on the lid member.

  Furthermore, it is preferable that the lid member is provided with a contact support portion that contacts the inner surface of the engagement receiving portion.

  According to this configuration, the contact support portion shares the engagement force acting on the engagement reception portion from the elastic engagement piece by bringing the inner surface of the engagement reception portion into contact with the contact support portion provided on the lid member. Can be supported. Therefore, since the engagement receiving portion can be thinned and the projecting dimension in the radial direction can be suppressed, the radial dimension of the drainage pump can be reduced.

  Moreover, it is preferable that the lid member is provided with a positioning portion that contacts the cover member and positions in the circumferential direction.

  According to this configuration, the cover member is positioned in the circumferential direction by being brought into contact with the positioning portion provided on the lid member, so that the lid member and the cover member can be assembled while being positioned, and the assembly workability is improved. be able to.

  Moreover, it is preferable that the engagement receiving portion is provided with a restriction portion that restricts movement of the elastic engagement piece in the circumferential direction.

  According to this configuration, by restricting the movement of the elastic engagement piece in the circumferential direction by the restriction portion provided in the engagement receiving portion, a positional shift when the elastic engagement piece is engaged with the engagement receiving portion is prevented. In addition to the prevention, the positioning of the pump body and the cover member in the circumferential direction can be performed by the elastic engagement piece and the engagement receiving portion, and the assembly workability can be further improved.

  The air conditioner of the present invention is an air conditioner including a refrigerant circuit including an indoor heat exchanger, an outdoor heat exchanger, a throttle device, and a compressor, and is provided in an indoor unit provided with the indoor heat exchanger. The drainage pump is provided.

  According to the drainage pump of the present invention, it is possible to simplify the structure by reducing the number of installed elastic engagement pieces and engagement receiving portions, and it is possible to reduce the number of assembly steps.

It is a perspective view showing the drainage pump concerning a 1st embodiment of the present invention. It is a disassembled perspective view which shows the said drain pump. It is a top view which shows the cover member of the said drain pump. It is a side view which shows the cover member and cover member of the said drainage pump. It is a perspective view which shows the drainage pump which concerns on 2nd Embodiment of this invention. It is a disassembled perspective view which shows the said drain pump. It is a schematic structure figure showing an air harmony machine concerning one embodiment of the present invention.

  A drainage pump according to a first embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, the drainage pump 1 of the first embodiment includes a pump chamber case 2 that is a pump body, a lid case 3 that is a lid member, a motor unit 4 that is a drive unit, and a cover member. And a certain upper cover 5. The drainage pump 1 is disposed above the drain pan 210 in order to discharge, for example, water accumulated in the drain pan 210 (see FIG. 7) inside the indoor unit (an indoor unit 200 described later) in the air conditioner. Thus, it can be used as a drain pump attached to an attachment surface (attachment target portion) extending substantially horizontally.

  The pump chamber case 2 is made of resin and is formed in a thin cylindrical shape, and has a pump chamber 22 that houses an impeller 21 that is an impeller inside. A suction port 23 is provided in the lower part of the pump chamber case 2 to be placed in the drain pan 210 and sucks water and the like. A drain pipe (not shown) is connected to the side of the pump chamber case 2 to supply water and the like. A discharge port 24 for discharging is provided. A pair of engagement receiving portions 25 that engage with elastic engagement pieces 55 of the upper cover 5 to be described later are vertically opposed to each other at a position orthogonal to the discharge port 24 and the radial direction on the peripheral surface portion of the pump chamber case 2. It is installed.

  The lid case 3 is made of resin and is formed in a cylindrical shape. The lid case 3 abuts on the upper end opening of the pump chamber case 2 via an O-ring 31 as a seal member, and functions as a lid for sealing the pump chamber 22. The lid case 3 is a circle that covers the pump chamber 22 of the pump chamber case 2 continuously from the trunk portion 32 erected over the circumference of approximately 3/4 round (270 °) and the lower portion of the trunk portion 32. A plate-shaped bottom 33, a bearing 34 erected at the center of the bottom 33, and a support wall 35 erected from the bottom 33 above the discharge port 24 are formed. . The body portion 32 and the support wall portion 35 are spaced apart from each other, and an opening 36 that communicates the inside and outside of the lid case 3 is formed by the gap.

  The motor unit 4 is formed of a DC brushless motor, and includes a resin mold unit 41 that incorporates a circuit board and a stator and is integrally formed of resin. A part of the peripheral surface of the resin mold part 41 is provided with a prismatic part 42 having a built-in connector to which a power line and a signal line are connected, protruding in the radial direction. A drive shaft (output shaft) (not shown) of the motor unit 4 extends downward and passes through the bearing portion 34 of the lid case 3 and is fixed to the impeller 21 in the pump chamber 22 of the pump chamber case 2. Note that the motor unit 4 is not limited to a DC brushless motor, and may be composed of other DC motors, AC motors, and other motors.

  The upper cover 5 is made of a resin and is formed in a circular lid shape. The upper cover 5 is provided so as to fit over the outer periphery of the motor unit 4 and cover substantially the entire surface excluding its lower surface. The upper cover 5 includes a cylindrical cylindrical portion 51, an upper surface portion 52 that continues to the upper portion of the cylindrical portion 51, and a protruding portion 53 that protrudes upward from the approximate center of the upper surface portion 52 and covers the bearing side of the motor portion 4. , Are formed. The upper surface portion 52 is integrally provided with brackets 54 extending upward and projecting outward at a predetermined angle from three locations dispersed in the circumferential direction, and these brackets 54 are fixed to a mounting surface (a top plate 220 described later). It has come to be. The three brackets 54 may be arranged at equal intervals in the circumferential direction of the upper cover 5 or may be arranged at unequal intervals. Further, the brackets 54 are not limited to three, and are provided at one location. , May be arranged in two places or four or more places. A pair of elastic engagement pieces 55 that extend downward and engage with the engagement receiving portion 25 of the pump chamber case 2 are provided at positions facing each other on the outer peripheral surface of the cylindrical portion 51.

  Hereinafter, the assembly structure of the drainage pump 1 will be described in detail with reference to FIGS. FIG. 3 is a plan view showing the lid case 3, and an enlarged view of the A part is shown in which a main part thereof (A part surrounded by an alternate long and short dash line in the figure) is enlarged. FIG. 4 is a side view showing the lid case 3 and the upper cover 5, and is a side view as seen from the right side (the support wall portion 35 side) of FIG.

  The body portion 32 of the lid case 3 is provided with a pair of flat wall portions 37 whose outer peripheral surfaces perpendicular to the support wall portion 35 and the radial direction are made flat. The upper surfaces of these flat wall portions 37 are provided at the same height as the upper surface of the support wall portion 35, and support surface portions 35 </ b> A and 37 </ b> A for mounting and supporting the motor unit 4 are configured by these upper surfaces. The outer surface 37B of the flat wall portion 37 is provided so as to recede inward in the radial direction from the outer peripheral surface of the barrel portion 32, and the engagement receiving portion 25 is slid by the step portion between the outer surface 37B and the outer peripheral surface of the barrel portion 32. A guide portion 37C for guiding is configured. Further, the flat wall portion 37 functions as a contact support portion whose outer surface 37 </ b> B contacts the inner surface of the engagement receiving portion 25.

  Further, a notch portion 38 with an upper end edge notched is formed at a position facing the support wall portion 35 in the body portion 32, and the cylindrical portion 51 of the upper cover 5 corresponding to the notch portion 38 includes: A notch 51A (see FIG. 4) is formed. These cutout portions 38 and 51A are configured to position the supported motor portion 4 in the circumferential direction by inserting the prismatic portion 42 of the motor portion 4. Further, in the body portion 32, an end edge facing the support wall portion 35 across the opening 36 functions as a positioning portion 39 that contacts the upper cover 5 and positions in the circumferential direction. That is, as shown in FIG. 4, the cylindrical portion 51 of the upper cover 5 is formed with a pair of cutout portions 56 whose lower end edges are cut away, and the side ends extending vertically in the pair of cutout portions 56. An edge 56A is provided. The pair of side end edges 56 </ b> A abut against the positioning portion 39 in opposite directions in the circumferential direction, whereby the upper cover 5 is positioned in the circumferential direction with respect to the lid case 3.

  With reference to FIG. 2 again, an engagement structure (so-called snap-fit structure) between the engagement receiving portion 25 of the pump chamber case 2 and the elastic engagement piece 55 of the upper cover 5 will be described. The engagement receiving portion 25 includes a receiving wall portion 25A that rises from the peripheral edge of the pump chamber case 2, a pair of rib wall portions 25B that protrude radially outward from both side edges of the receiving wall portion 25A, and a receiving wall portion. A receiving claw portion 25C that protrudes from the outer surface of 25A and engages with the elastic engagement piece 55 is configured. The elastic engagement piece 55 includes a base portion 55A that protrudes radially outward from the cylindrical portion 51 of the upper cover 5, a plate-like elastic plate portion 55B that extends downward from the base portion 55A, and a tip inner side of the elastic plate portion 55B. And an engaging claw portion 55 </ b> C provided at the front end.

  In the elastic engagement piece 55, the elastic plate portion 55B is inserted between the pair of rib wall portions 25B of the engagement receiving portion 25, guided downward along the receiving wall portion 25A, and the elastic plate portion 55B is elastic. The engaging claw portion 55C gets over the receiving claw portion 25C while being deformed, so that the engaging claw portion 55C is engaged with the engaging receiving portion 25. In this state where the elastic engagement piece 55 and the engagement receiving portion 25 are engaged, the movement of the elastic plate portion 55B in the circumferential direction is restricted by being sandwiched between the pair of rib wall portions 25B. The pair of rib wall portions 25B function as restricting portions. Further, in the engaged state, an elastic force acts on the engagement receiving portion 25 from the elastic engagement piece 55 inward in the radial direction. This elastic force is applied to the lid case 3 from the receiving wall portion 25A. It is transmitted to the flat wall portion 37 and is supported by the receiving wall portion 25 </ b> A and the flat wall portion 37.

  As for the assembly procedure of the drainage pump 1 described above, first, the upper cover 5 is turned upside down and the bracket 54 side is placed on a work table or the like, the motor unit 4 is inserted into the upper cover 5, and the notch is cut. Position the prism 51 of the motor unit 4 through the unit 51A. Next, the lid case 3 is attached to the upper cover 5 and the motor unit 4. At this time, the drive shaft of the motor unit 4 is passed through the bearing unit 34 of the lid case 3, the rectangular column 42 of the motor unit 4 is inserted into the notch 38 of the lid case 3, and the positioning unit 39 of the lid case 3 is further inserted. Along the side edge 56A of the notch 56 of the upper cover 5, the upper cover 5, the motor unit 4, and the lid case 3 are positioned in the circumferential direction. Next, the impeller 21 is fixed to the tip of the drive shaft of the motor unit 4 protruding from the bearing part 34 of the lid case 3, and the O-ring 31 is disposed on the bottom 33 of the lid case 3. Next, the pump chamber case 2 is fitted to the lid case 3. At this time, the engagement receiving portion 25 of the pump chamber case 2 is slid along the flat wall portion 37 while being guided by the pair of guide portions 37C of the lid case 3, and the engagement receiving portion 25 approaches the elastic engagement piece 55. Let Further, the elastic plate portion 55B of the elastic engagement piece 55 is slid along the receiving wall portion 25A while being guided by the pair of rib wall portions 25B of the engagement receiving portion 25, and the engagement claw portion 55C of the elastic engagement piece 55 is thus obtained. Is engaged with the receiving claw portion 25 </ b> C of the engagement receiving portion 25.

  In addition, as an assembly procedure of the drainage pump 1, the following procedure may be used. First, the drive shaft of the motor unit 4 is passed through the bearing portion 34 of the lid case 3, and the tip end of the drive shaft is fixed to the impeller 21. Next, the impeller 21 is inserted into the pump chamber 22 so that the O-ring 31 is sandwiched between the pump chamber 22 of the pump chamber case 2 and the bottom portion 33 of the lid case 3, and is guided to the pair of guide portions 37C of the lid case 3. The engagement receiving portion 25 is slid along the flat wall portion 37 while the pump chamber case 2 and the lid case 3 are fitted together. Next, the upper cover 5 is put on the motor portion 4 and is slid along the receiving wall portion 25A while guiding the elastic plate portion 55B of the elastic engaging piece 55 to the pair of rib wall portions 25B of the engaging receiving portion 25. Further, the engaging claw portion 55C of the elastic engaging piece 55 is moved to the receiving claw portion of the engaging receiving portion 25 while the side edge 56A of the cutout portion 56 of the upper cover 5 is brought into sliding contact with the positioning portion 39 of the lid case 3. Engage with 25C.

  By engaging the elastic engagement piece 55 and the engagement receiving portion 25 in this manner, the O-ring 31 is sandwiched between the pump chamber case 2 and the lid case 3 in a pressed state, thereby closing the pump chamber 22. It is like that. Furthermore, when the O-ring 31 is sandwiched in the pressed state, the lid case 3 is pressed toward the motor unit 4 and the upper cover 5 by the repulsive force. As a result, the lid case 3 and the motor unit 4 are held between the pump chamber case 2 and the upper cover 5 and the assembly of the drainage pump 1 is completed.

  According to the above embodiment, the lid case 3 and the motor unit 4 are sandwiched between the pump chamber case 2 and the upper cover 5, and the elastic engagement piece 55 and the engagement receiving unit 25 are engaged. The drainage pump 1 is assembled integrally. Therefore, compared with the conventional structure, the number of the elastic engagement pieces 55 and the engagement receiving portions 25 can be reduced to simplify the structure of the drainage pump 1, and the number of assembly steps can be reduced. .

  Further, since the pump chamber case 2 and the upper cover 5 are connected by the engagement of the elastic engagement piece 55 and the engagement receiving portion 25 with the lid case 3 and the motor portion 4 interposed therebetween, the overall size of the drainage pump 1 is reduced. Even in this case, the arm length necessary for the elastic plate portion 55B of the elastic engagement piece 55 to bend can be secured, and the assemblability can be improved while ensuring the engagement strength.

  Further, a guide portion 37C is formed by a step portion between the outer surface 37B of the flat wall portion 37 formed on the lid case 3 and the outer peripheral surface of the body portion 32, and the engagement receiving portion 25 is slid and guided by the guide portion 37C. The engagement receiving portion 25 can be positioned at a predetermined position while positioning the pump chamber case 2 and the lid case 3.

  Further, the receiving wall portion 25A of the engagement receiving portion 25 comes into contact with the outer surface 37B of the flat wall portion 37, and the elastic force acting from the elastic engagement piece 55 is supported by the receiving wall portion 25A and the flat wall portion 37. By doing so, the receiving wall portion 25A of the engagement receiving portion 25 can be thinned and the protruding dimension in the radial direction can be suppressed, so that the diameter size of the drainage pump 1 can be reduced.

  Further, the side edge 56A of the notch 56 formed in the upper cover 5 abuts on the positioning portion 39 of the lid case 3, and the upper cover 5 is positioned in the circumferential direction with respect to the lid case 3, so that the lid case 3 and the upper cover 5 can be assembled while being positioned, and the assembly workability can be improved.

  Further, the elastic plate portion 55B of the elastic engagement piece 55 is sandwiched between the pair of rib wall portions 25B of the engagement receiving portion 25, and the movement of the elastic engagement piece 55 in the circumferential direction is restricted. It is possible to prevent positional displacement when the engaging piece 55 is engaged with the engaging receiving portion 25 and to perform positioning of the pump chamber case 2 and the upper cover 5 in the circumferential direction, thereby further improving the assembly workability. be able to.

  In the above drainage pump 1, the bracket 54 is formed integrally with the upper cover 5, and the upper cover 5 and the lid case are formed by the side edge 56 </ b> A of the notch 56 of the upper cover 5 and the positioning portion 39 of the lid case 3. 3 is positioned in the circumferential direction, and the pump chamber case 2 having the discharge port 24 is guided with respect to the lid case 3 by the engagement receiving portion 25 being guided by the guide portion 37C. Is positioned. As a result, the upper cover 5, the lid case 3, and the pump chamber case 2 having the discharge port 24, which are integrally formed with the bracket 54, are positioned in the circumferential direction. The mouth 24 can be properly positioned at a predetermined angle.

  Next, a drainage pump according to a second embodiment of the present invention will be described with reference to FIGS. The drainage pump 1A of the present embodiment, like the drainage pump 1 of the first embodiment, is a pump chamber case 2 that is a pump body, a lid case 3 as a lid member, a motor unit 4 that is a drive unit, And an upper cover 5 which is a cover member. The drainage pump 1A of the present embodiment is different from the drainage pump 1 of the first embodiment in the configuration of the elastic engagement piece and the engagement receiving portion, and the other configurations are the same as or similar to those in the first embodiment. . Hereinafter, differences from the first embodiment will be described in detail, and the same or similar configurations as those of the first embodiment will be denoted by the same reference numerals, and description thereof will be omitted or simplified.

  In the first embodiment, the engagement receiving portion 25 is provided in the pump chamber case 2 and the elastic engagement piece 55 is provided in the upper cover 5, but as shown in FIGS. In the drainage pump 1 </ b> A, a pair of elastic engagement pieces 26 are provided in the pump chamber case 2, and a pair of engagement receiving portions 57 are provided in the upper cover 5.

  The elastic engagement piece 26 includes a base portion 26A that protrudes radially outward from the peripheral edge of the pump chamber case 2, a plate-like elastic plate portion 26B that extends upward from the base portion 26A, and a tip inner side of the elastic plate portion 26B. And an engaging claw portion 26 </ b> C provided at the front end. The engagement receiving portion 57 includes a receiving wall portion 57A that extends downward from the outer peripheral surface of the cylindrical portion 51 of the upper cover 5, and a pair of rib wall portions 57B that protrude radially outward from both side edges of the receiving wall portion 57A. And a receiving claw portion 57C that protrudes from the outer surface of the receiving wall portion 57A and engages with the engaging claw portion 26C of the elastic engagement piece 26.

  In the elastic engagement piece 26, the elastic plate portion 26B is guided by the pair of rib wall portions 57B of the engagement receiving portion 57, and the engagement claw portion 26C gets over the receiving claw portion 57C while the elastic plate portion 26B is elastically deformed. Thus, it is configured to engage with the engagement receiving portion 25. In the engaged state, the elastic plate portion 26B is sandwiched between the pair of rib wall portions 57B, so that the movement of the elastic engaging piece 26 in the circumferential direction is restricted. Further, in the engaged state, the elastic force acting from the elastic engagement piece 26 is transmitted from the receiving wall portion 57A to the flat wall portion 37 of the lid case 3 so as to be supported.

  The assembly procedure of the drain pump 1A is substantially the same as the drain pump 1 of the first embodiment, but the positioning procedures of the pump chamber case 2, the lid case 3 and the upper cover 5 are slightly different. That is, when the lid case 3 is fitted to the upper cover 5 and the motor unit 4, the engagement receiving portion 57 is guided by the guide portion 37 </ b> C along the flat wall portion 37 of the lid case 3 and the upper cover 5. When the side edge 56A of the notch 56 and the positioning portion 39 of the lid case 3 come into contact with each other, the upper cover 5 and the lid case 3 are fitted together while being positioned in the circumferential direction. Further, when the impeller 21 is fixed to the drive shaft of the motor unit 4 and the pump chamber case 2 is attached after the O-ring 31 is disposed, the elastic engagement piece 26 is a pair of rib wall portions of the engagement receiving portion 57. The pump chamber case 2 is positioned in the circumferential direction with respect to the upper cover 5 by being guided between 57B, and the drainage pump 1A is engaged by engaging the elastic engagement piece 26 and the engagement receiving portion 57 with each other. Are assembled together.

  According to the above embodiment, the same operational effects as those of the first embodiment can be obtained. That is, the lid case 3 and the motor unit 4 are sandwiched between the pump chamber case 2 and the upper cover 5, and the elastic engagement piece 26 and the engagement receiving unit 57 are engaged, so that the drainage pump 1A is integrated. Assembled. Therefore, compared with the conventional structure, the number of the elastic engagement pieces 26 and the engagement receiving portions 57 can be reduced to simplify the structure of the drainage pump 1A, and the number of assembly steps can be reduced. .

  Further, the elastic plate portion 26B of the elastic engagement piece 26 is sandwiched between the pair of rib wall portions 57B of the engagement receiving portion 57, and the movement of the elastic engagement piece 26 in the circumferential direction is restricted. In addition to preventing displacement when the engagement piece 26 is engaged with the engagement receiving portion 57, the pump chamber case 2 and the upper cover 5 can be positioned in the circumferential direction, further improving the assembly workability. be able to.

  In the drainage pump 1A described above, the bracket 54 is formed integrally with the upper cover 5, and the side edge 56 </ b> A of the notch 56 of the upper cover 5, the positioning portion 39 of the lid case 3, and the upper cover 5. The upper cover 5 and the lid case 3 are not only positioned in the circumferential direction by the receiving portion 57 and the guide portion 37 </ b> C of the lid case 3, but the pump chamber case 2 having the discharge port 24 is attached to the upper cover 5. On the other hand, the rib wall portion 57B of the engagement receiving portion 57 of the upper cover 5 and the elastic plate portion 26B of the elastic engagement piece 26 of the pump chamber case 2 are positioned in the circumferential direction. Thereby, since the three of the upper cover 5, the lid case 3, and the pump chamber case 2 having the discharge port 24, in which the bracket 54 is integrally formed, are positioned in the circumferential direction, the bracket 54 and the discharge port 24 can be properly positioned at a predetermined angle.

  Next, an air conditioner according to an embodiment of the present invention will be described with reference to FIG. FIG. 7 is a diagram illustrating a schematic configuration of an air conditioner according to an embodiment of the present invention. This air conditioner is used, for example, as an air conditioner provided in a house or a commercial facility.

  The air conditioner includes a refrigeration cycle including an indoor heat exchanger 110, an outdoor heat exchanger 120, a throttle device 130, a compressor 140, and a flow path switching valve 150. The indoor heat exchanger 110 is provided in the indoor unit 200, and the outdoor heat exchanger 120, the expansion device 130, the compressor 140, and the flow path switching valve 150 are provided in the outdoor unit 300.

  The flow path of the refrigeration cycle of the air conditioner is switched to two flow paths of “cooling mode” and “heating mode” by the flow path switching valve 150. In the cooling mode, as indicated by solid arrows in FIG. 7, the refrigerant compressed by the compressor 140 flows into the outdoor heat exchanger 120 from the flow path switching valve 150 and into the expansion device 130. Then, the refrigerant is expanded by the expansion device 130 and flows into the indoor heat exchanger 110. The refrigerant that has flowed into the indoor heat exchanger 110 flows into the compressor 140 via the flow path switching valve 150. On the other hand, in the heating mode, as indicated by the dashed arrows in FIG. 7, the refrigerant compressed by the compressor 140 flows into the indoor heat exchanger 110 from the flow path switching valve 150 and into the expansion device 130. Then, the refrigerant is expanded by the expansion device 130 and circulated in the order of the outdoor heat exchanger 120, the flow path switching valve 150, and the compressor 140.

  In the cooling mode, the outdoor heat exchanger 120 functions as a condenser, the indoor heat exchanger 110 functions as an evaporator, and the room is cooled. In the heating mode, the outdoor heat exchanger 120 functions as an evaporator, the indoor heat exchanger 110 functions as a condenser, and the room is heated.

  The indoor unit 200 includes a drain pan 210 below the indoor heat exchanger 110, and the drain pumps 1 and 1A of the above embodiments are attached to the top plate 220. A control device 230 that controls the drain pumps 1 and 1A is provided. I have. The suction port 23 of the drainage pump 1, 1 </ b> A is disposed in the drain pan 210, and by the rotation of the impeller 21, the drain water accumulated in the drain pan 210 is sucked from the suction port 23 and the sucked drain water is discharged and discharged from the port 24. . A discharge pipe is connected to the discharge port 24 and is drained to a position away from the indoor unit 200 (air conditioner).

  In addition, this invention is not limited to the said embodiment, Including other structures etc. which can achieve the objective of this invention, the deformation | transformation etc. which are shown below are also contained in this invention. For example, although the case where the drainage pumps 1 and 1A are used as the drain pump for the drain pan inside the indoor unit in the air conditioner is illustrated in the above embodiment, the drainage pump of the present invention is an air conditioner such as an air conditioning indoor unit. It is applicable not only to a machine but also to various devices, and can be used not only as a drain pump but also for drainage in various parts.

  In the above-described embodiment, the guide portion 37C is constituted by the step portion between the outer surface 37B of the flat wall portion 37 and the outer peripheral surface of the trunk portion 32 in the lid case (lid member) 3, and the guide receiving portion is formed by the guide portion 37C. However, the lid member may not be provided with a guide portion that slides the engagement receiving portion. Moreover, as a guide part, it is not restricted to what is comprised by the level | step-difference part like the said embodiment, You may be comprised by a groove part and a protrusion.

  Moreover, in the said embodiment, although the flat wall part 37 was provided in the cover case (lid member) 3 as a contact support part contact | abutted to the engagement receiving parts 25 and 57, an engagement receiving part is provided in a cover member. The abutting support portion that abuts on the inner surface of the A may not be provided. Further, the abutting support portion is not limited to being configured by a wall-shaped portion such as the flat wall portion 37 of the above-described embodiment, and may be configured by a columnar portion or a protruding portion.

  Moreover, in the said embodiment, the positioning part 39 which consists of the side edge of the trunk | drum 32 in the lid case (lid member) 3, the side edge 56A of the notch part 56 formed in the upper cover (cover member) 5, Are in contact with each other and thereby the upper cover 5 is positioned in the circumferential direction with respect to the lid case 3. However, the lid member and the cover member may not be provided with positioning portions for positioning with respect to each other. . Further, the positioning portion is not limited to the configuration in which the side edges are in contact with each other as in the above-described embodiment, and may be configured to be positioned with respect to each other by concave-convex fitting.

  In the above-described embodiment, the pair of rib wall portions 25B and 57B of the engagement receiving portions 25 and 57 constitutes a restriction portion that restricts movement with the elastic plate portions 26B and 55B of the elastic engagement pieces 26 and 55 interposed therebetween. However, the restricting portion that restricts the movement of the elastic engagement piece in the circumferential direction may not be provided. Moreover, as a control part, it is not restricted to what is comprised by a pair of rib wall part 25B, 57B like the said embodiment, You may be comprised by a groove part and a protrusion. Moreover, as a control part, it is not restricted to an engagement receiving part, You may be provided in the other site | part in a pump main body or a cover member.

  Further, in the first embodiment, a pair of engagement receiving portions 25 are erected on the peripheral surface portion of the pump chamber case 2 so as to face each other at a position orthogonal to the discharge port 24 in the radial direction. An elastic engagement piece 55 is provided at a predetermined position of the upper cover 5 corresponding to the receiving portion 25. In the second embodiment, a pair of elastic engagement pieces 55 are disposed at positions on the peripheral surface portion of the pump chamber case 2 perpendicular to the discharge port 24 in the radial direction. The elastic engagement pieces 26 are erected opposite to each other, and the engagement receiving portion 57 is provided at a predetermined position of the upper cover 5 corresponding to the pair of elastic engagement pieces 26. , 57 and the elastic engagement pieces 26, 55 and the discharge port 24 are not limited to positions orthogonal to the radial direction, and may be arbitrarily set positions.

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the scope of the present invention. Is included in the present invention.

1,1A Drainage pump 2 Pump chamber case (pump body)
3 Lid case (lid member)
4 Motor part (drive part)
5 Top cover (cover member)
21 Impeller
22 Pump chamber 25, 57 Engagement receiving part 25B, 57B Rib wall part (regulation part)
26, 55 Elastic engagement piece 35 Support wall portion 37 Flat wall portion (contact support portion)
37C Guide part 39 Positioning part 110 Indoor heat exchanger 120 Outdoor heat exchanger 130 Throttle device 140 Compressor

Claims (6)

A pump body having a pump chamber for accommodating the impeller;
A lid member that contacts the pump body and closes the pump chamber;
A drive unit that is supported by the lid member and drives the impeller;
A cover member that covers the drive unit and is attached to the attachment target portion;
With
One of the pump main body and the cover member is provided with an elastic engagement piece, and the other is provided with an engagement receiving portion, and the lid member and the drive unit are provided between the pump main body and the cover member. A drainage pump that is assembled integrally by engaging an elastic engagement piece with an engagement receiving portion with a pinch interposed therebetween.   The drainage pump according to claim 1, wherein the lid member is provided with a guide portion that slides and guides the engagement receiving portion.   The drainage pump according to claim 1 or 2, wherein the lid member is provided with a contact support portion that contacts the inner surface of the engagement receiving portion.   The drainage pump according to any one of claims 1 to 3, wherein the lid member is provided with a positioning portion that contacts the cover member and positions in the circumferential direction.   The drainage pump according to any one of claims 1 to 4, wherein the engagement receiving portion is provided with a restriction portion that restricts movement of the elastic engagement piece in a circumferential direction. An air conditioner including a refrigerant circuit including an indoor heat exchanger, an outdoor heat exchanger, a throttle device, and a compressor,
An air conditioner comprising the drainage pump according to any one of claims 1 to 5 in an indoor unit provided with the indoor heat exchanger.

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