CN101900124B - Drain pump - Google Patents

Abstract

A drain pump is capable of improving water resistance and preventing metal components from corrosion due to dropping water. The drain pump (1) includes a pump main body (3) having rotating vane (2) inside, and a motor (5) arranged on the pump main body (3) and rotatingly driving the rotating vane (2), the motor (5) is composed of a moulding motor, a waterproof upper cover (6) for covering the metal components arranged on the upper surface side is covered on the motor, furthermore, a waterproof lower cover (7) for covering the metal components arranged on the lower surface side of the motor is arranged between the motor (5) and the pump main body (3).

Description

Draining pump

Technical field

The present invention relates to a kind of draining pump, particularly relate to a kind of load indoor apparatus of air conditioner, for will refrigeration time or dehumidifying time the draining that produces in vaporizer to the pump of outdoor discharge.

Background technique

In the past, as shown in Figure 8, type-dividing conditioner comprises: have the outdoor unit 32 of compressor 34 and condenser 35 and the indoor set 33 built with expansion valve 36 and vaporizer 37, gas refrigerant is compressed by compressor 34, cooled by condenser 35 thus become liquid, the pressure drop of this liquid is made by expansion valve 36, make this liquid gasification by vaporizer 37 and obtain gasification heat, thus being freezed in indoor.In addition, the arrow in figure represents the flow direction of refrigeration agent.

Here, in the indoor set 33 of above-mentioned air conditioner 31, when cooling operation, the hydrogenesis in air and be attached on vaporizer 37, drips in the drain pan 38 of the below being located at vaporizer 37.Here, in order to the draining be trapped in drain pan 38 is discharged to outdoor, use draining pump 39.Use this draining pump 39, by erecting pipe 40, draining temporarily being picked up, then, being directed to outdoor by inclination pipe arrangement 41.

But, in said structure, when draining pump 39 stops, being trapped in and erecting draining in pipe 40 grade to draining pump 39 adverse current, as shown in Fig. 9 (a), sometimes spray from the through hole 43 of the upper cover 42 being arranged in draining pump 39.And if water level is higher, when pumping up water running, draining is sometimes overflowed from the through hole 43 of draining pump 39.In this case, the draining W of ejection disperses to motor 44 side, becomes and motor 44 is corroded and the main cause causing action bad.

Such as, here, as shown in Fig. 9 (b), in the draining pump described in patent documentation 1, above through hole 43, live axle 45 is provided with discoideus manger board 46, the draining sprayed can be prevented to be attached in motor 44 grade.

Patent documentation 1: Japanese Unexamined Patent Publication 2000-240581 publication

The problem that invention will solve

In the indoor set 33 shown in Fig. 8, be sometimes trapped in the water evaporation in drain pan 38, water droplet is attached on the top board of indoor set 33.At this moment, owing to dripping and motor 44 of getting wet in the top of water from draining pump 39, therefore may cause the corrosion of the metal construction of motor 44 and inside thereof, causing action bad.

Summary of the invention

The present invention in view of above-mentioned draining pump in the past problem points and make, its object is to, provide a kind of draining pump, this draining pump can improve water proofing property, prevents by the corrosion of the metal construction dripped caused by water.

For solving the means of problem

In order to achieve the above object, draining pump of the present invention has: built with the pump casing of rotation blade, and be positioned at the top of this pump casing and described rotation blade carried out to the motor of rotary actuation, the feature of this draining pump is, described motor is molding type motor, this molding type motor has: utilize insulating resin to seal stator and circuit substrate etc. and the motor casing formed, be configured in the rotor of the inner side of this motor casing, the live axle linked with described rotation blade, and be configured in the upper surface of described motor casing and lower surface and support the metal bearing portion of described live axle, and the waterproof cover covering the described bearing portion of the upper surface side of this molding type motor covers on this molding type motor, in above-mentioned draining pump, recess can be provided with in the side of described waterproof cover, this recess embeds for the cast gate of the side being formed in described molding type motor.

Adopt the present invention, motor is made up of molding type motor, and waterproof cover is set to cover the metal construction of the upper surface side of this motor, therefore, it is possible to suitably avoid the water dripped from the top of draining pump to get wet motor or metal construction, the corrosion of these components can be prevented.

In above-mentioned draining pump, be provided with recess in the side of described waterproof cover, this recess embeds for the cast gate of the side being formed in described molding type motor.Thereby, it is possible to position waterproof cover and motor with simple structure.And, can prevent waterproof cover from rotating on motor, can by running time vibration and noise suppression must be lower.

In above-mentioned draining pump, between described molding type motor and described pump casing, the 2nd waterproof cover covering the metal construction of the lower face side of this molding type motor can be set.Thus, also can protect the metal construction be positioned on the downside of motor, waterproof countermeasure that can be suitable to the whole implementation of draining pump.

In above-mentioned draining pump, can on the side of in described waterproof cover and described 2nd waterproof cover, form snap-fit portion, there is engagement pawl in this snap-fit portion its tip portion is projecting, and it is outstanding to the opposing party in this waterproof cover and the 2nd waterproof cover, and the side of the opposing party in this waterproof cover and the 2nd waterproof cover forms hooking part, and this hooking part and described engagement pawl engage.Thus, the dismounting of waterproof cover and the 2nd waterproof cover becomes easy, when can improve the assembling of draining pump and maintenance time workability.And, due to snap-fit portion and waterproof cover or the 2nd waterproof cover are formed, therefore do not need metal installation component, can avoid by the corrosion of the installation component dripped caused by water.

In above-mentioned draining pump, can arrange recess in the side of described 2nd waterproof cover, this recess embeds for the cast gate of the side being formed in described molding type motor.Thereby, it is possible to position the 2nd waterproof cover and motor with simple structure.

In above-mentioned draining pump, through hole can be worn in the bottom of described 2nd waterproof cover, the bottom of the 2nd waterproof cover is configured in the top of the pump chamber of described pump casing, connection shaft set on the described rotation blade being positioned at this pump chamber is inserted through described through hole.Due to by the bottom of the 2nd waterproof cover and the lid component of pump casing integrated, therefore, it is possible to cut down part number of packages, assembling procedure number and cost of parts can be reduced.

In above-mentioned draining pump, described waterproof cover and/or described 2nd waterproof cover can be plastic article.

In above-mentioned draining pump, described molding type motor can have tablet DC brushless motor structure.Thus, motor miniaturization, lightweight can be made, and can by running time vibration and noise suppression must be lower.

The effect of invention

As mentioned above, adopt the present invention, can provide a kind of draining pump, this draining pump can improve water proofing property, prevents by the corrosion of the metal construction dripped caused by water.

Accompanying drawing explanation

Fig. 1 is the overall diagram of the example representing draining pump of the present invention, and (a) is plan view, and (b) is plan view, and (c) is side view.

Fig. 2 is the part sectioned view of the A-A line of Fig. 1 (a).

Fig. 3 is the exploded view of the draining pump of Fig. 1.

Fig. 4 is the figure of the rotation blade structure of the draining pump representing Fig. 1, and (a) is plan view, and (b) is plan view, and (c) is worm's eye view.

Fig. 5 is the figure of the electric motor structure of the draining pump representing Fig. 1, and (a) is plan view, and (b) is plan view, and (c) is side view.

Fig. 6 is the figure of the superstructure of the draining pump representing Fig. 1, and (a) is plan view, and (b) is plan view, and (c) is side view.

Fig. 7 is the figure of the lower cover structure of the draining pump representing Fig. 1, and (a) is plan view, and (b) is plan view, and (c) is side view.

Fig. 8 is the integrally-built schematic diagram of the type-dividing conditioner represented in the past.

Fig. 9 is the figure of an example of the draining pump represented in the past.

Symbol description

1 draining pump

2 rotation blades

2a discoid component

2b connection shaft

2c large footpath blade

2d path blade

2e connect apertures

3 pump main bodys

3a shell

3b pump chamber

3c suction pipe

3d discharge tube

3e engagement pawl

3f snap-fit portion

3g opening surface

5 motor

5a motor casing

5b live axle

5c, 5d bearing portion

5e circuit substrate

5g wire interconnecting piece

5h cast gate

6 upper covers

6a lid main body

The accommodation section of 6b bearing

6c engagement pawl

6d snap-fit portion

6e recess

6f recess

7 lower covers

7a lid main body

7b motor support portion

7c through hole

Bottom 7d

7e supporting portion

7f otch

7g the 1st hooking part

7h recess

7i the 2nd hooking part

8 manger boards

10 wires

11 O shape rings

Embodiment

Below, be described in detail for implementing form of the present invention with reference to accompanying drawing

Fig. 1 ~ Fig. 3 represents an example of draining pump of the present invention, and this draining pump 1 roughly comprises: built with the pump main body (pump casing) 3 of rotation blade 2, the motor 5 being configured in the top of pump main body 3, the upper cover 6 covering the top of motor 5 and the lower cover 7 be arranged between pump main body 3 and motor 5.

Pump main body 3 is for drinking up the draining be trapped in drain pan (not shown) and be discharged to outdoor, as shown in Figure 2, have plastic shell 3a, this shell 3a comprises: pump chamber 3b, the suction pipe 3c being located at the bottom of pump chamber 3b of collecting rotation blade 2 and the discharge tube 3d extended from pump chamber 3b to substantially horizontal.And as shown in Fig. 1 (b), (c), be formed with snap-fit portion 3f at the lateral circle surface of shell 3a, the top of this snap-fit portion 3f is projecting engagement pawl 3e.In addition, as shown in Figure 2, the lid component blocking the upper opening of shell 3a is made up of the bottom of lower cover 7.

Rotation blade 2, formed by plastics, as shown in Figure 4, have: discoid component 2a, the cylindric connection shaft 2b extended along the central shaft of discoid component 2a, be formed in the multiple large footpath blade 2c on the surface of discoid component 2a and be formed in the back side of discoid component 2a and the multiple path blade 2d be inserted in the suction pipe 3c of pump main body 3.Connection shaft 2b is formed the connect apertures 2e of the live axle 5b for being pressed into motor 5.

Motor 5 carries out rotary actuation for the rotation blade 2 being internally loaded on pump main body 3, contains rotor (revolving part) and stator (fixed block) etc. therein.As shown in Figure 5, in motor 5, stator, circuit substrate 5e etc. utilize insulating resin carry out mold pressing (resin seal) process, and be formed with motor casing 5a.

In addition, motor 5 is made up of the DC brushless motor of so-called tablet, has Hall element drive IC, is configured to the inner-rotor type and the rotor (revolving part) with permanent magnet relative with stator (fixed block side) being configured in inner side.Whole height can do less by the motor of this form, and due to torque even, have operating sound little, vibrate little characteristic.

The live axle 5b linked with the rotation blade 2 in pump main body 3 gives prominence to from the bottom of motor casing 5a, and, at upper surface and the lower surface of motor casing 5a, be configured with bearing portion 5c, 5d of supporting driving shaft 5b.These live axles 5b and bearing portion 5c, 5d are made of metal, and configure with the state exposed.In addition, as shown in Figure 2, live axle 5b is provided with discoideus manger board 8, it is for preventing the water loading sprayed from pump main body 3 at motor 5.

Upper cover 6 is got wet for preventing the metal construction of the upper surface side exposed at motor 5 (bearing portion 5c), and anti-sealing enters inside by the gap between bearing portion 5c and motor casing 5a.Upper cover 6, by plastic shaping, as shown in Figure 6, has the lid main body 6a having lid cylindric, and this lid main body 6a thereon face center is provided with the accommodation section 6b of the bearing portion 5c of collecting motor 5.

The internal diameter of lid main body 6a is roughly the same with the size of the external diameter of motor 5, and, be formed at the lateral circle surface of lid main body 6a: the projecting recess 6f having the cast gate of the snap-fit portion 6d of engagement pawl 6c, the recess 6e corresponding with the wire interconnecting piece 5g (with reference to figure 5) of motor 5 and the side with motor casing 5a (Japanese: ゲ ー ト mouth) 5h (with reference to figure 5) corresponding in top.

Lower cover 7 is attached to the metal construction (live axle 5b, bearing portion 5d) of the lower face side exposed at motor 5 from outside for anti-sealing, identical with upper cover 6, by plastic shaping.As shown in Figure 7, lower cover 7 has: cylindric lid main body 7a, be formed at the motor support portion 7b on the top of lid main body 7a and be equipped with the bottom 7d of through hole 7c in central authorities.In the inside of lid main body 7a, be equipped with multiple supporting portion 7e of the intensity for strengthening lower cover 7, and be provided with otch 7f in the side of lid main body 7a, it is discharged for the water that will be trapped in lid, prevents from covering interior formation negative pressure.

Motor support portion 7b is formed as diameter and is greater than lid main body 7a, at the lateral circle surface of this motor support portion 7b, be formed with the recess 7h corresponding with the cast gate 5h (with reference to figure 5) of the 1st hooking part 7g that the snap-fit portion 6d (with reference to figure 6) of upper cover 6 engages and the side with motor casing 5a.And bottom 7d plays the effect (with reference to figure 2) of the lid component blocked by the upper opening of the shell 3a of pump main body 3, lateral circle surface of 7d bottom this, be provided with the 2nd hooking part 7i engaged with the snap-fit portion 3f of shell 3a.

Next, be described with reference to the assembling method of Fig. 1 ~ Fig. 7 to the draining pump 1 with said structure.

First, as shown in Figure 2,3, manger board 8 is arranged on the live axle 5b of motor 5, and motor 5 is placed on lower cover 7.At this moment, in the recess 7h that the motor support portion 7b that the gate part 5h of motor 5 embeds lower cover 7 is provided with (with reference to figure 5,7), the position of motor 5 and lower cover 7 is positioned.

In addition, as shown in Fig. 1 (a), the position of recess 7h is set to, and at the end of the assembling of draining pump 1, the opening surface 3g of wire interconnecting piece 5g (pull-out direction of wire 10a) and discharge tube 3d is towards same direction.Thus, as shown in Fig. 1 (a) ~ (c), the superjacent air space of flexible utilization discharge tube 3d can configure wire 10, can the space of occupying of the draining pump 1 in indoor set (not shown) be suppressed less.

Next, as shown in Figure 2,3, upper cover 6 is covered the top of motor 5, and by the recess 6f (with reference to figure 5,6) that the cast gate 5h of motor 5 embeds upper cover 6, upper cover 6 and motor 5 are positioned.In addition, by cast gate 5h is embedded recess 6f, can prevent upper cover 6 from rotating on motor 5, can must be lower by vibration when operating and noise suppression.

Then, as shown in Fig. 1 (c), the engagement pawl 6c of the snap-fit portion 6d hung down by the lateral circle surface from upper cover 6 is locked to the 1st hooking part 7g on the top being located at lower cover 7.Thus, while link upper cover 6 and lower cover 7, clamp motor 5 by two lids 6,7, when can prevent from operating, motor 5 rocks.

So, the fixing use snap-fit for two lids 6,7 links, and the dismounting of therefore covering 6,7 becomes easy, when can improve the assembling of draining pump 1 and maintenance time workability.And, owing to snap-fit portion 6d and plastic upper cover 6 being formed, therefore do not need metal installation component (such as screw etc.), the corrosion of the caused installation component that can prevent from dripping.

Next, as shown in Figure 2,3, the coupling shaft 2b of rotation blade 2 is inserted in the through hole 7c of lower cover 7, and the live axle 5b of motor 5 is pressed into the connect apertures 2e (with reference to figure 4) of connection shaft 2b.Then, as shown in Fig. 1 (c), the engagement pawl 3e of the snap-fit portion 3f erected by the lateral circle surface from shell 3a is locked to the 2nd hooking part 7i of the bottom being located at lower cover 7, pump main body 3 and lower cover 7 is linked.In addition, between pump main body 3 and lower cover 7, the O shape ring 11 (with reference to figure 2) as Sealing is installed.

As mentioned above, adopt this example, owing to utilizing molding type motor to form motor 5, therefore, it is possible to the roughly entirety of motor 5 is made waterproof pattern, the water dripped from the top of draining pump 1 can be avoided to get wet motor 5.In addition, covered by upper cover 6 on motor 5, also can realize the protection of the bearing portion 5c of the upper surface side exposed at motor 5, therefore can prevent the corrosion of bearing portion 5c, anti-sealing is entered in motor by gap.

And; expose at the bearing portion 5d of the lower face side of motor 5 and live axle 5b owing to arranging lower cover 7 between motor 5 and pump main body 3 to cover; therefore the metal construction of the downside being positioned at motor 5 can also be protected, waterproof countermeasure that can be suitable to the whole implementation of draining pump 1.

In addition, in above-mentioned example, at the lateral circle surface of upper cover 6, the snap-fit portion 6d outstanding to lower cover 7 side is set, and form the 1st hooking part 7g (with reference to figure 1 (c)) corresponding with this snap-fit portion 6d on the top of the lateral circle surface of lower cover 7, but also can put upside down the position relationship of snap-fit portion and hooking part, arrange on the top of the lateral circle surface of lower cover 7 to outstanding snap-fit portion, upper cover 6 side, form hooking part at the lateral circle surface of upper cover 6.Between lower cover 7 and pump main body 3 too.

Claims (8)

1. a draining pump, has: built with rotation blade pump casing and be positioned at the top of this pump casing and described rotation blade carried out to the motor of rotary actuation, the feature of this draining pump is,

Described motor is molding type motor, this molding type motor has: utilize insulating resin to seal stator and circuit substrate etc. and the motor casing formed, be configured in the rotor of the inner side of this motor casing, the live axle linked with described rotation blade, and be configured in the upper surface of described motor casing and lower surface and support the metal bearing portion of described live axle, and the waterproof cover covering the described bearing portion of the upper surface side of this molding type motor covers on this molding type motor, recess is provided with in the side of described waterproof cover, this recess embeds for the cast gate of the side being formed in described molding type motor.

2. draining pump as claimed in claim 1, is characterized in that, between described molding type motor and described pump casing, be provided with the 2nd waterproof cover of the metal construction of the lower face side covering this molding type motor.

3. draining pump as claimed in claim 2, it is characterized in that, on the side of the side in described waterproof cover and described 2nd waterproof cover, be integrally formed with snap-fit portion, there is engagement pawl in this snap-fit portion its tip portion is projecting, and outstanding to the opposing party in this waterproof cover and the 2nd waterproof cover, and the side of the opposing party in this waterproof cover and the 2nd waterproof cover is formed with hooking part, this hooking part and described engagement pawl engage.

4. draining pump as claimed in claim 2, is characterized in that, be provided with recess in the side of described 2nd waterproof cover, and this recess embeds for the cast gate of the side being formed in described molding type motor.

5. draining pump as claimed in claim 3, is characterized in that, be provided with recess in the side of described 2nd waterproof cover, and this recess embeds for the cast gate of the side being formed in described molding type motor.

6. the draining pump according to any one of claim 2 to 5, it is characterized in that, through hole is equipped with in the bottom of described 2nd waterproof cover, the bottom of the 2nd waterproof cover is configured in the top of the pump chamber of described pump casing, and connection shaft set on the described rotation blade being positioned at this pump chamber is inserted through described through hole.

7. draining pump as claimed in claim 6, it is characterized in that, described waterproof cover and/or described 2nd waterproof cover are plastic article.

8. draining pump as claimed in claim 7, is characterized in that, described molding type motor has tablet DC brushless motor structure.