KR100381279B1 - high pressure pump - Google Patents

Abstract

The high temperature generated in the motor and the pump driving unit in the process of circulating the hot water in a commercial dishwasher, and the like to be directly cooled by using the outside air sucked when driving the motor, the present invention is provided on one side of the motor Removably fixed, the back cover formed in the radial direction and the back hole formed in the inner side to cool the motor drive unit and the long hole formed on the edge larger than the diameter of the housing to cool the heat radiating fin of the motor, and fixed to the back cover Air passage holes through which air discharged to the heat radiating fins pass are formed on the same circumference, and a long hole-shaped air passage hole through which air discharged to the motor drive portion passes is formed in a radial direction, and a motor shaft between the back cover and the cap. Heat dissipation fins by discharging suction air to the inside and outside of the back cover due to the expansion of airflow And a cooling fan formed to be smaller than the diameter of the back cover to cool the motor drive unit.

Therefore, by directly cooling each of the mechanical seals that generate frictional heat during the high-speed rotation of the impeller and the inner coil of the motor by the external air sucked during the rotation of the cooling fan installed in the rear of the high-pressure pump to significantly increase the cooling efficiency. Will be. By effectively cooling the high heat generated in the motor and the high-pressure pump driving unit by the suctioned external air, the service life is significantly extended and their maintenance costs can be reduced by easy post-management. By injection molding the wing of the impeller, weight and cost are reduced, and the work process for machining the impeller is unnecessary as in the prior art, thereby significantly reducing the manufacturing cost. The injection molding of the unit blade of the impeller prevents the scale from sticking to the unit blade and prevents overloading of the motor driving unit during initial driving of the impeller.

Description

High pressure pump

The present invention is mounted on a commercial dishwasher, such as high pressure to directly cool the high temperature generated in the motor and the pump drive unit in the process of circulating the high temperature water by using the external air sucked when driving the motor It is about a pump.

More specifically, the internal coil of the motor is cooled by the external air sucked during the rotation of the cooling fan installed at the rear of the high pressure pump, and at the same time, the external air passing through the motor is installed at the pump front part. The present invention relates to a high-pressure pump capable of cooling a mechanical seal that generates frictional heat during high speed rotation of an impeller.

1 is a schematic view of a state in which the cap and the discharge case of the high pressure pump according to the prior art are separated.

As shown, a motor (M) consisting of a stator wound around the coil and integrally fixed to the housing 1, and a rotor installed inside the stator to be rotatable when power is applied to the coil, and the motor. (M) A cooling fan (3) for cooling by discharging external air, which is attached to the motor shaft at the rear and sucked during rotation, to the radiating fin (2) protruding radially on the outer periphery of the housing (1), and forwards the motor (M). It is equipped with an impeller (7) for discharging the rinsing water, etc. flowing through the inlet port 5 formed in the discharge case (4) when it is mounted on the motor shaft at high speed (about 3000rpm) do.

Accordingly, the heat dissipation fins 2 formed on the outer periphery of the housing 1 are cooled by the discharge of external air sucked into the cap 8 when the cooling fan 3 interlocked when the motor M is driven. It is possible to indirectly cool the motor drive unit built in (1), and at the same time, it is possible to cool the condenser accommodated in the condenser casing 9 mounted on the outer periphery of the housing 1.

However, the high pressure pump as described above is formed in the explosion-proof type so that the inside of the housing 1 is sealed, so that the external air discharged during the rotation of the cooling fan 3 is not directly supplied to the motor driving unit, so that the inside of the housing 1 There is a problem in that the high heat generated in the motor drive of the cooling does not sufficiently cool the life of these shortened.

In addition, as the individual unit blades forming the impeller 7 described above are manufactured by machining, the working time is increased and the manufacturing cost is greatly increased, thereby losing the price competitiveness of the product.

In addition, the impeller (7) and the discharge case (4) is made of a brass material with strong durability and corrosion resistance to rinsing water, etc., as well as the weight and cost increase, as well as the residues, rinsing water contained in the rinsing water for a long time use Calcium (Ca), magnesium (Mg), etc. dissolved due to the temperature rise of the water are calcified and accumulated in the unit blade (7a), and the scale is fixed. Since the pumping is not performed smoothly, after-care work is required to remove them, and if scales are accumulated on the rotational friction surface of the impeller 7, the motor driving part is overloaded because it interferes with the rotation during the initial driving of the impeller 7. You will have a problem that is occurring.

In addition, as the condenser casing 9, which accommodates the condenser separated from the above-described motor drive unit, is integrally attached to the outer periphery of the housing 1, a sufficient contact area with the external air sucked in when the cooling fan 3 is rotated. There is a problem that does not have enough to cool the condenser sufficiently.

In addition, when the above-described cross-sectional shape of the unit blade (3a) of the cooling fan (3) is formed in a straight shape, when the shape is deformed due to the high temperature generated during high-speed rotation to contact the inner surface of the cap (8), the pump After separating from the mounting portion of the washing machine, the cooling fan (3) can be replaced by removing the cap (8) from the pump has a problem that must go through a number of work processes.

Accordingly, an object of the present invention is to directly cool the mechanical seal part in which frictional heat is generated during high-speed rotation of the inner coil of the motor and the impeller by the external air sucked during the rotation of the cooling fan installed at the rear of the high pressure pump. It is to provide a high pressure pump that can significantly increase the (at least 30% improvement in the art).

Another object of the present invention is to provide a high-pressure pump that effectively cools the high heat generated in the motor and the high-pressure pump driving unit, significantly extends their service life, and reduces maintenance costs.

Another object of the present invention is to provide a high-pressure pump that can reduce the weight and cost costs by injection molding the impeller wing, and can greatly reduce the production cost due to the easy manufacturing work.

Another object of the present invention, by injection molding the unit blade except the rotational friction portion of the impeller to prevent the scale and the like fixed to the unit blade, and to prevent the overload occurs in the motor drive during the initial drive of the impeller It is to provide a high pressure pump.

1 is a schematic view of a state in which the cap and the discharge case of the high pressure pump according to the prior art,

2 is a perspective view of a high pressure pump according to the present invention;

3 is an exploded perspective view of the high pressure pump according to the present invention;

4 is a state diagram used in the high pressure pump according to the present invention.

* Explanation of symbols used in the main part of the drawing

10; housing

11; motor

12; Through ball

13; Motor back cover

14; Heat dissipation fin

15; Mechanical seal

16; Cooling fan

17; Discharge case

18; Impeller

19; Condenser

The object of the present invention described above is a radius that is fixed to one side of the motor detachably, the long hole is formed inward to cool the motor drive unit and the long hole formed on the edge larger than the diameter of the housing to cool the heat radiation fin of the motor The back cover is formed in the direction, and the air passing hole is fixed to the back cover and the air passing through the air discharged to the heat radiation fins are formed on the same circumference, and the long hole-shaped air passing hole through which the air discharged to the motor drive passes is formed in the radial direction. And a cap that is mounted to the motor shaft between the back cover and the cap, and discharges the suction air to the inside and outside of the back cover due to the expansion of the airflow passing through the back cover so as to cool the heat dissipation fins and the motor driving part. It is achieved by providing a high pressure pump, characterized in that it comprises a cooling fan is formed.

According to a preferred embodiment, a condenser casing for accommodating the condenser is provided between the outer surface of the housing so that the condenser mounted outside the housing can be cooled by external air passing through the through hole of the motor back cover. So that they are spaced apart.

According to a preferred embodiment, the aforementioned cooling fan is formed with an air inlet for sucking external air during rotation, and the unit blade spirals to form a vortex in the external air sucked during rotation and to prevent heat deformation due to high temperature. Is formed.

According to a preferred embodiment, the aforementioned cooling fan is a casing for recessing the spiral unit blade formed integrally on the inner side, an annular support plate for holding the inner end of the unit blade fixed, and is generated when the cooling fan is rotated. It is provided with a straight reinforcement rib that protrudes radially on the back surface of the support plate to prevent bending deformation due to high temperature.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are intended to be described in detail to be easily carried out by those skilled in the art to which the present invention pertains, and thus the present invention It does not mean that the technical scope of the is limited.

As shown in Figure 2 to 4, the coil is wound on the outer surface of the motor (11) consisting of a stator fixed to the housing 10 and the rotor is installed inside the stator rotatably when the power is applied to the coil And a motor back cover 13 formed on the motor shaft 11a behind the motor 11 and having a long hole-shaped passage hole 12 through which external air sucked when driving the motor 11 passes.

In addition, the radiating fins 14 which are radially mounted on the outer periphery of the housing 10 outside air that is mounted to the motor shaft 11a behind the motor 11 and passes through the through holes 12 of the motor back cover 13 when rotating. Cooling the coil wound on the stator as external air passing through the gap between the stator and the rotor of the motor 11, and cooling the coil wound around the stator and the motor 11 as external air passing through the gap between the stator and the rotor. The cooling fan 16 which cools the mechanical seal part 15 mounted in front is provided.

In addition, the rinsing water flowing through the inlet port (17a) formed in the discharge case 17 when the rotation is mounted to the motor shaft (11a) in front of the above-described motor 11 to discharge at a high pressure through the discharge port (17b), rinsing The impeller 18 in which the unit blade 18a is partially injection-molded is provided to prevent the calcium, which is dissolved due to the temperature rise of the residue or the rinsing water contained in the water, from being calcified and the scale accumulated. .

Further, preferably, the condenser 19 is accommodated so that the condenser 19 mounted outside the housing 10 can be cooled by the outside air passing through the through hole 12 of the motor back cover 13. Condenser casing 20 is spaced apart so as to form a pneumatic discharge passage between the outer surface of the housing (10).

Further, preferably, the cooling fan 16 described above is provided with a casing 16d having an air intake port 16a capable of sucking external air. The outer casing and the inner part of the casing 16d are separated by an annular support plate 16e having the same rotation axis. On the outer side divided by the support plate 16e, a plurality of unit blades 16d are spiraled. These unit blades 16d form a vortex in the outside air sucked during rotation, and in particular, have their own rigidity in construction, and are prevented from being thermally deformed by high temperatures. A plurality of reinforcing ribs 16f are disposed radially inside the casing 16d. These reinforcing ribs 16f serve to provide rigidity to itself or to the unit blades 16b, thereby preventing bending deformation due to the high temperature generated when the cooling fan 16 rotates.

Reference numeral 21 is a cap that surrounds and protects the cooling fan 16 described above. On the plate surface of the cap 21, a plurality of air passing holes 21b and 21c are formed around the motor shaft hole 21a formed at the center thereof. Among them, the inner air passing hole 21b is a long hole formed in a radial direction and passes outside air toward the motor driving unit. The air through holes 21c formed on the outside of the air through holes 21b are formed with a predetermined length on the same circumference and pass outside air toward the heat radiating fins 14.

Hereinafter, the method of using the high pressure pump according to the present invention will be described with reference to the accompanying drawings.

As shown in Figure 4, when the power is applied to the coil wound on the outer surface of the stator constituting the motor 11 built in the dishwasher, the rotor is rotated by the mutual magnetic field generated between the stator and the rotor Accordingly, the impeller 18 and the cooling fan 16 mounted at the front and rear of the rotating shaft 11a of the motor 11 simultaneously rotate at a predetermined speed.

As the above-described cooling fan 16 rotates, the external air sucked through the cap 21 surrounding the cooling fan 16 passes through the air inlet 16a of the cooling fan 16, and then is formed in a spiral cooling fan. The outside air in which the vortex is formed by the unit blade 16b of (16) is discharged to the motor 11 through the through hole 12 of the motor back cover 13 fixed to the rear of the housing 10.

That is, as the outside air sucked by the rotation of the cooling fan 16 described above passes through the long hole-shaped through hole 12a formed at the edge side of the motor back cover 13, the outer periphery of the housing 10 is radial. It is discharged to the heat radiation fins 14 formed to be cooled.

At the same time, it is possible to cool the condenser 19 accommodated in the condenser casing 20 mounted on the outer periphery of the housing 10 by the external air passing through the edge side passage hole 12a described above. At this time, as the above-described condenser casing 20 is fixed to be spaced apart from the outer surface of the housing 10 to form a pneumatic discharge passage, the area in which the condenser casing 20 is in contact with external air is increased to cool the condenser 19. It is possible to greatly improve the cooling efficiency.

In addition, after the external air sucked by the above-described driving of the cooling fan 16 passes through the long hole-shaped through hole 12b formed at the center side of the motor back cover 13, the stator of the motor 11 While passing between the electrons it is possible to cool the high heat generated in the coil wound on the stator of the motor (11).

In addition, after the external air passing through the passage hole 12b formed at the center of the motor back cover 13 passes between the stator and the rotor of the motor 11, the discharge case 17 in which rinsing water is circulated. Mechanical seal portion 15 mounted to the motor shaft 11a in front of the motor 11 to prevent heat of high temperature (approximately 80 ° C to 90 ° C) from being transferred to the motor 11 side. Since it is discharged to the cooling can be. As a result, the mechanical seal 15 may be prevented from being thermally deformed due to the high temperature heat generated by the frictional heat during the high speed rotation of the impeller 18.

On the other hand, the rinsing water flowing through the inlet (17a) of the discharge case 17 due to the high speed rotation (about 3000rpm) of the impeller 18 mounted on the motor shaft (11a) in front of the motor 11 described above It can be discharged at a high pressure through the outlet 17b.

At this time, as the above-described unit blade 18a of the impeller 18 is injection molded, foreign substances included in the rinsing water flowing into the discharge case 17, calcium, magnesium, and the like dissolved in the rinsing water are calcified and the unit blade ( Accumulation in 18a) prevents the scale from sticking. In addition, since the accumulation of scales and the like on the rotating friction surface of the impeller 18 is prevented, the overload is prevented from being generated in the driving part of the motor 11 during the initial driving of the impeller 18 so that the service life of the corresponding parts can be extended. do.

In addition, the injection molding of the unit blade (18a) of the impeller 18 is easy to manufacture, it is possible to significantly reduce the manufacturing cost.

As mentioned above, according to a preferable embodiment, it has the following advantages.

First, by directly cooling each of the mechanical seals that generate frictional heat during the high speed rotation of the inner coil of the motor and the impeller by the external air sucked during the rotation of the cooling fan installed in the rear of the high pressure pump, the cooling efficiency can be greatly increased. Will be.

Second, by effectively cooling the high heat generated in the motor and the high-pressure pump driving unit by the intake of the outside air to significantly extend their service life, it is easy to follow-up management can reduce the maintenance cost.

Third, the injection molding of the wing of the impeller reduces the weight and cost cost, and the work process for machining the impeller is unnecessary as in the prior art is easy to manufacture and can greatly reduce the production cost.

Fourth, the injection molding of the unit blade portion of the impeller prevents the scale from sticking to the unit blade portion, and prevents overloading of the motor driving portion during initial driving of the impeller.

Claims (4)

In the high pressure pump which discharges the rinsing water introduced by the impeller interlocked when the motor is driven at high pressure: Removably fixed to one side of the motor, the back cover is formed in the radial direction of the long hole formed in the edge to be larger than the diameter of the housing to cool the heat radiation fin of the motor and the long hole formed inward to cool the motor drive unit ; A cap fixed to the back cover and having air passage holes through which air discharged to the heat dissipation fins pass, formed on the same circumference, and having a long hole shape air passage hole through which air discharged to the motor driving unit passes in a radial direction; And Mounted on the motor shaft between the back cover and the cap, due to the expansion of the air flow through the back cover to discharge the suction air to the inside and outside of the back cover than the diameter of the back cover to cool the radiating fins and the motor drive unit A high pressure pump comprising a cooling fan formed small. The air pressure discharge passage according to claim 1, wherein a condenser casing for accommodating the condenser is provided between the outer surface of the housing to cool the condenser mounted outside the housing by external air passing through the through hole of the motor back cover. High pressure pump, characterized in that mounted to be spaced apart. The high-pressure pump of claim 1, wherein the cooling fan has an air inlet for sucking external air, and a unit blade is formed spirally so as to prevent thermal deformation due to high temperature during rotation. According to claim 1 or 3, wherein the cooling fan; A casing for recessing the spiral unit blade formed integrally with the inner surface; An annular support plate for fixing and supporting the inner end of the unit blade; And High-pressure pump characterized in that it comprises a straight reinforcement rib radially protruding on the back surface of the support plate to prevent the bending deformation due to the high temperature generated when the cooling fan rotates.