KR102041438B1 - Electric water pump and manufacturing method for thereof - Google Patents

Abstract

The present invention relates to an electric water pump and a manufacturing method thereof, wherein a heat radiation means used in the electric water pump and a structure of the electric water pump can be changed at the same time to simplify a production process of the electric water pump, thereby increasing productivity. Moreover, maintainability and user convenience of the electric water pump can be increased. The electric water pump comprises: a pump housing configured to accommodate a motor; an accommodation body having one open side and inserted into one side of the pump housing; a control substrate attached to one surface of the pump housing; and a liquid silicone heat transfer unit applied between one surface of the pump housing and the control substrate to attach the control substrate.

Description

Electric water pump and manufacturing method thereof

The present invention relates to an electric water pump and a method of manufacturing the same, and more particularly, to an electric water pump and a method for manufacturing the electric water pump that can be produced more economically by changing the adhesive means used in the electric water pump.

Electric water pump (EWP) is a pump driven by a motor controlled by a separate device, mainly used for the circulation of the cooling water. The electric water pump can determine the flow rate of the coolant regardless of the rotation speed of the engine, can reduce the power required by 60 ~ 70% compared to the mechanical water pump, and is structurally simple because it is driven by a motor instead of a belt drive. For example, it is widely applied to vehicles.

The prior art related to the electric water pump is disclosed in Korean Patent Publication No. 10-1332853 ("Electric motor water pump with a cooling member", published on Nov. 27, 2013, the prior art 1). 1 is a view of the prior art 1, the structure of a conventional electric water pump with reference to FIG.

As shown in FIG. 1, in the conventional electric water pump, the motor main body 20 is installed in the pump case 10. The motor body 20 discharges fluid from the inlet port 30 to the outlet port 40 while rotating the impeller connected to the shaft 50 and the shaft. The motor body 20 is electrically connected through a control board 60 formed on one side of the pump and an internal terminal 80 to control the motor body 20 through a control circuit printed on the control board 60. Done.

Typically, one side of the motor body 20 side of the control panel 60 is provided with a pad for dissipation (hereinafter referred to as a heat dissipation pad) to transfer heat generated from the control board 60 to the pump case 10.

The heat dissipation pad was installed by applying an adhesive to a predetermined space of the pump case 10 and then attaching the heat dissipation pad. The heat dissipation pad is likely to be folded or torn during the manufacturing process or the use of the water pump. Adhesion of the heat radiation pad had a problem that requires two processes.

In addition, the electric water pump shown in FIG. 1 had to be supplied with power from a separate external power source. In general, an external terminal formed of a conductor penetrates the cover 70 installed to accommodate the control board 60 so as to pass through the outside. Both ends of the terminal were connected to the control board and external power, respectively, and the control board and the motor were connected to the internal terminals to supply power to the motor from the external power. This conventional configuration had to insert injection into each of the outer terminal and the inner terminal through the cover, this manufacturing method has a problem that is not easy to manufacture because the two insert injection must be made, the economical efficiency, the outer terminal cover Since the controller board and the motor are connected to each other through the gap, foreign matter may flow into the gap between the external terminal and the cover, and when debugging or repairing the control board, the electrical power of the external power source-external terminal-control board There was a problem that the user was inconvenient to do this because the debugging or maintenance was required after disconnecting and removing the cover.

Korean Patent Publication No. 10-1332853 ("Automotive Water Pump with Cooling Member", Announcement Date 2013.11.27.)

The present invention has been made to solve the problems as described above, the object of the electric water pump and a method of manufacturing the same according to the present invention is to change the heat dissipation pad used in the prior art more easy to manufacture electric water pump and its production In providing a method.

In addition, another object of the present invention is to simplify the manufacturing process by structurally changing the external terminal and the internal terminal installed in the electric water pump, to facilitate the production, maintenance and maintenance of the control plate for controlling the electric water pump It is to provide an electric water pump and a manufacturing method thereof that can facilitate the.

Electric water pump according to the present invention for solving the above problems is a pump housing for receiving a motor; Receptacle fitted to one side of the pump housing in an open shape on one side; A control plate attached to one surface of the pump housing; And a heat transfer part made of a liquid silicone material applied between one surface of the pump housing and the control plate to attach the control plate. Characterized in that it comprises a.

In addition, the heat transfer part is applied to a depression formed on one surface of the pump housing, the pump housing is protruded to one side and the insertion portion is formed on the outer portion of the insertion portion and the insertion portion is applied to the heat transfer portion is interviewed with the receptor And the electric water pump further includes a sealing member formed between the outer portion and the container, wherein the sealing member is liquid silicon, and a first fitting portion formed in a protrusion or groove shape is formed on one surface of the outer portion. And a second fitting portion formed in a shape of a protrusion or a groove to correspond to the first fitting portion on one surface of the container which is in contact with the outer portion, and the liquid silicone is applied to the first fitting portion and formed of a conductor. And an external terminal and conduction formed to penetrate the receptor to electrically connect the control board to an external power source. Is formed into, and further comprises an inner terminal for electrically connecting the motor and the control plate through the pump housing and the receptor, wherein the receptor, the outer terminal and the inner terminal is manufactured by insert injection, the It characterized in that it further comprises a cover installed to cover the control plate on one side.

The method of manufacturing the electric water pump according to the present invention manufactures a pump housing and a container, but the outer terminal and the inner terminal penetrate the container so that one end is located outside of the container and the other end is located inside the container. Pre-production step of producing; An assembly step of installing a part of a pump including a motor inside the pump housing, assembling the container to one side of the pump housing, and connecting one end of the inner terminal to the motor; A heat transfer part applying step of applying a heat transfer part made of a liquid silicone material to one surface of the pump housing; A control plate installation step of installing a control plate on a heat transfer part applied to one surface of the pump housing; And a cover installation step of installing a cover to cover the control plate. Characterized in that it comprises a.

In addition, the pump housing is protruded to one side is formed in the insert portion and the outer portion of the insert is applied to the heat transfer portion and the outer portion to interview the receptor, the manufacturing method of the electric water pump is the pre-production step and the Performed between the heat transfer unit application step, further comprising a sealing member application step of applying a sealing member of the liquid silicone material between the outer portion and the receptor, wherein the control plate installation step is the control plate using a press fitting To install, the step of installing the control board, after installing the control board, screwed so that one end of the bolt penetrates the control board to reach the pump housing, and connects the bolt and the ground of the control board It features.

According to the electric water pump and the manufacturing method thereof according to the present invention as described above, since the heat transfer unit is applied to the liquid silicone in place of the heat radiation pad used in the past, the number of processes in the heat transfer unit is reduced, Since the liquid silicone is applied, there is no fear of damaging the heat transfer part.

In addition, according to the present invention, the external terminal electrically connecting the external power supply and the control plate and the internal terminal electrically connecting the control plate and the motor are integrated with the receptor through the insert injection, thereby producing the receptor through a single production process. Therefore, the economic efficiency is improved.

In addition, according to the present invention, since a separate electrical conductor such as a terminal is not installed in the cover formed to cover the control board, no additional work is required when the cover is removed for debugging or maintenance of the control board. In using the electric water pump, there is an effect that the convenience is improved.

1 is a cross-sectional view of a conventional electric water pump.
2 is a cross-sectional view of the electric water pump according to the present invention.
3 is a partially enlarged view of FIG. 2;
Figure 4 is a cross-sectional view before the assembly step of the manufacturing method of the electric water pump according to the present invention.
Figure 5 is a cross-sectional view after the heat transfer unit coating step of the production method of the electric water pump according to the present invention.
Figure 6 is a cross-sectional view after the control board installation step of the manufacturing method of the electric water pump according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the electric water pump according to the present invention.

Figure 2 shows a cross section of the electric water pump according to an embodiment of the present invention.

FIG. 2 illustrates only a part of the electric water pump in order to explain the features of the electric water pump according to the embodiment of the present invention. As shown in FIG. 2, the electric water pump according to the embodiment of the present invention is a pump. The housing 100, the receptor 200, the control plate 300, and the heat transfer part 400 may be included.

The pump housing 100 illustrated in FIG. 2 is a case, and parts necessary for driving the motor and the electric water pump may be accommodated therein, and an example of the parts accommodated in the pump housing 100 may include a motor and a shaft 111. ) And an impeller (not shown).

The motor may include a stator 113 and a rotor 112 shown in FIG. 2.

The stator 113 rotates the rotor 112 by changing a current to generate a magnetic field. Therefore, the power supply and the control signal need to be applied to the stator 113.

The shaft 111 is a portion that rotates together as the rotor 112 rotates, and the impeller is coupled to one end (lower based on FIG. 2) of the shaft 111 to serve to introduce / discharge fluid.

As shown in FIG. 2, the motor housing 100 may include a protrusion 120 and an outer portion (not shown).

As shown in FIG. 2, the protrusion 120 is a portion in which a central portion of the motor protrudes upward, and the control plate 300 and the heat transfer part 400 may be formed on the protrusion 120.

As shown in FIG. 2, since the protrusion 120 is a portion in which only a central portion of the motor protrudes, a part of the periphery of the protrusion 120, that is, a portion that contacts the bottom surface of the receptor 200 occurs, The part which contacts the lower surface becomes an outer part.

As shown in FIG. 2, the receptor 200 is a portion formed at one side of the pump housing 100, and the protrusion 120 of the pump housing 100 is inserted into a coupling hole formed in the receptor 200.

The receptor 200 can be formed through injection.

3 is an enlarged view of a portion of FIG. 2.

As shown in FIG. 3, the electric water pump according to the exemplary embodiment of the present invention may further include a sealing member 600.

As shown in FIG. 3, when the protrusion 120 of the pump housing 100 is inserted into the coupling hole of the receiver 200, a sealing member (a) is formed between the upper surface of the outer portion and the lower surface of the receiver 200. 600 may be formed. The sealing member 600 is a portion formed to prevent the penetration of a material such as water / dust into the space inside the container 200.

The sealing member 600 may be formed of various materials, but in the present embodiment, the sealing member 600 may be formed by applying liquid silicon. Liquid silicone acts as a sealing and has a certain degree of adhesion.

As shown in FIG. 3, a first fitting portion 610 having a protrusion shape protruding upward is formed at an outer portion of the pump housing 100, and the receiver 200 may correspond to the first fitting portion 610. A groove-shaped second fitting portion (not shown) is formed on the bottom surface, and the sealing member 600, which is liquid silicone, is applied between the first fitting portion 610 and the second fitting portion. Since the sealing member 600 is a liquid phase, it is easy to apply to the first sloping portion 610, and since the first fitting portion 610 and the second fitting portion may be fitted to each other, the pump housing 100 and the receiver ( 200, when assembling, there is an effect that the failure rate can be less than the sealing member formed of an elastic material such as O-ring (O-ring).

In FIG. 3, a protrusion-shaped first fitting portion 610 is formed at an outer portion of the pump housing 100, and a second fitting portion having a groove shape corresponding to the first fitting portion 610 is formed on a lower surface of the container 200. Although the present invention is not limited thereto, there may also be an embodiment in which a groove-shaped first fitting portion is formed at an outer portion of the pump housing 100 and a protrusion-shaped second fitting portion is formed on the lower surface of the receiver 200.

As shown in FIG. 2, the control plate 300 is attached to one surface of the pump housing 100. The outer portion of the control panel 300 is connected to the outer terminal 510 and the inner terminal 520 integrated with the receptor 200.

 The control board 300 is a type of printed circuit board (PCB) printed circuit for supplying and controlling power to the electric water pump according to an embodiment of the present invention, the motor, more specifically the motor It is electrically connected to the stator 113 included in the controllable power applied to the stator 113 can adjust the degree of rotation of the rotor 112 and the shaft 111.

As illustrated in FIGS. 2 and 3, a heat transfer part 400 may be formed between the control plate 300 and one surface of the pump housing 100. The heat transfer part 400 may be formed by coating silicon having high thermal conductivity, particularly liquid silicon. The heat transfer part 400 formed of liquid silicone can be installed more easily than a conventional heat radiating pad to be attached after applying an adhesive, and unlike the heat radiating pad, it is not damaged.

The heat transfer part 400 serves as a kind of passage for discharging heat generated from the control plate 300 to the outside. The pump housing 100 is formed of a material having high thermal conductivity (for example, aluminum), and receives the heat generated from the control plate 300 and discharged through the heat transfer part 400 to be discharged to the outside. That is, the pump housing 100 serves as a kind of heat sink for absorbing and dissipating heat generated from the control board 300, thereby preventing malfunction and failure of the control board 300.

Since the liquid silicon is used for the heat transfer part 400, a predetermined recessed space may be formed on one surface of the pump housing 100 so as not to flow to the outside when the liquid silicon is applied. That is, after the liquid silicon is applied to the recessed space, the control board 300 is disposed on one side of the heat transfer part 400.

As shown in FIG. 2, the control panel 300 may be disposed above the heat transfer part 400, and then electrically connected to each of the external terminal 510 and the internal terminal 520, and may be electrically connected to the first bolt. It may be fixed to the pump housing 100 through B1).

As shown in FIG. 2, the present invention may further include a cover 210. The cover 210 is to prevent the foreign matter from entering the space where the control plate 300 is installed by preventing the control plate 300 from being exposed to the outside. The cover plate covers one open side of the container 200. Seal the space 300 is installed.

In FIG. 2, the cover 210 is disposed to cover an open side of the container 200, but a predetermined fitting structure or coupling means is formed between the container 200 and the cover 210 to cover the cover 210. Can be fixed.

As illustrated in FIG. 2, the external terminal 510 is used as a transmission passage for power or control signals applied to the control panel 300 through the side of the receiver 200. The outer terminal 510 is interrupted in the receptor 200 and both ends are located inside and outside the receptor 200, for which the receptor 200 can be insert injected with the outer terminal 510.

Although not shown, a plurality of external terminals 510 may be formed.

As shown in FIG. 2, the inner terminal 520 connects the motor and the control plate 300 to each other through the pump housing 100 and the receiver 200. The inner terminal 520 is formed of a conductor, and like the outer terminal 510, the insert terminal may be injected together with the receptor 200. That is, the outer terminal 510 and the inner terminal 520 may be fixed together inside the mold and then injected together with the receptor 200.

When the pump housing 100 and the receiver 200 are coupled to each other, the inner terminal 520 is inserted into the pump housing 100 and connected to the stator 113 of the motor, thereby controlling the control plate 300 and the stator 113. Can be electrically connected to each other.

Hereinafter, a method of manufacturing the electric water pump according to the present invention will be described in detail with reference to the accompanying drawings. Since the manufacturing method of the electric water pump to be described below describes the manufacturing method of the electric water pump described above, it is regarded as the same configuration when the name or the same configuration as the electric water pump.

The method of manufacturing the electric water pump according to the present invention may include a pre-production step, an assembly step, a heat transfer part applying step, a control plate installation step, and a cover installation step.

4 to 6 illustrate a cross section after the above-described steps have been performed to explain a method of manufacturing an electric water pump according to an embodiment of the present invention.

The pre-production step is to manufacture the pump housing 100 and the receptor 200, respectively, the receptor 200 is the outer terminal 510 and the inner terminal 520 penetrates the receptor 200, respectively, one end of the outer / inner terminal The outside of the silver receptor 200, the other end is produced to be located inside the receptor (200).

In the pre-manufacturing step, the receptor 200 is fixed to the inside of the mold by fixing the outer terminal 510 and the inner terminal 520 when the container 200 is ejected in order to be integrated with the outer terminal 510 and the inner terminal 520. Insert injection can be done.

The pump housing 100 may be formed of a metal material having high thermal conductivity, such as aluminum.

As shown in FIG. 4, the assembling step includes installing a part of a pump including a motor inside the pump housing 100, and assembling the receiver 200 to one side of the pump housing 100, and then an internal terminal ( One end of 500 is connected to the motor. In this case, as shown in FIG. 4, a liquid sealing member (not shown) is applied to the first fitting portion 610, which is a portion where the outer portion 130 of the pump housing 100 and the lower surface of the receiver 200 contact each other. Sealing member coating step is performed to improve the airtightness of the present invention.

In the assembling step, the pump housing 100 such that the first fitting portion 610 protruding upward on the upper surface of the outer portion 130 and the second fitting portion 620 recessed upward on the lower surface of the receptor 200 are fitted to each other. ) And the receptor 200 can be assembled.

In the assembling step, the pump housing 100 and the receiver 200 may be in contact with each other, and then may be screwed through the second bolt B2 as shown in FIG. 5. However, the method of fixing the pump housing 100 and the receptor 200 in the assembly step of the present invention is not limited to the second bolt (B2) shown in FIG. There may be an embodiment in which the receptor 200 is coupled to each other.

As shown in FIG. 5, the heat transfer part applying step applies a heat transfer part 400 made of liquid silicon to one surface of the protrusion 120 of the pump housing 100. In this case, a predetermined space may be recessed on one surface of the protrusion 120 so as not to flow to another part after the liquid silicone is coated.

As shown in FIG. 6, the control board installation step installs the control board 300 on the heat transfer part 400 applied to one surface of the protrusion 120 of the pump housing 100. The control board 300 may be installed through a press fitting method. In the control panel installation step, after the control panel 300 is installed on one side of the heat transfer unit 400, the operation of connecting the external terminal 510 and the internal terminal 520 to the control panel 300 may be performed.

Since the heat transfer part 400 is formed of liquid silicon, the heat transfer part 400 may have an adhesive strength to some extent, but may be weak to fix the control plate 300. Therefore, as shown in FIG. 2, the first bolt B1 may be bolted to the bolting hole formed in the central portion of the controller board 300 to fix the controller board 300 to the motor housing 100. The first bolt B1 is in contact with a circuit connected to the ground of the control board 300, and as a result, the control board 300 is connected to the ground (not shown), thereby being introduced into the control board 300 from the outside. Electrostatic discharge (ESD) may be induced to the ground through the first bolt (B1), it is possible to prevent the malfunction and failure of the control plate 300.

Although only a single first bolt B1 is shown in FIG. 2, the present invention is not limited thereto, and a plurality of first bolts may be installed.

In the cover installation step, the cover 210 is installed so that the control board 300 is not exposed to the outside. The cover 210 may be coupled through laser welding or heat corking, but the present invention is not limited thereto, and the cover 210 may be assembled in the same manner as a fitting structure. There may be various embodiments.

The electric water pump according to the present invention, in which the cover installation step is performed and completed, is illustrated in FIG. 2. In the electric water pump according to the present invention as shown in FIG. 2, since a conductor such as a terminal for a separate electrical connection is not formed on the cover 210, the control board 300, the user controls the above. When debugging or maintaining the substrate, it is easy to use simply by removing the cover 210, and also insert-extracts the receptor 200 and forms the outer terminal 400 and the inner terminal 500 together. As a result, productivity is increased.

The present invention is not limited to the above-described embodiments, and the scope of application is not limited, and various modifications can be made without departing from the gist of the present invention as claimed in the claims.

B1: 1st bolt B2: 2nd bolt
10: pump case 20: motor body
30: inlet 40: outlet
50 shaft 60 control panel
70: cover 80: inner terminal
100: pump housing 111: shaft
112: rotor 113: stator
120: protrusion 130: outer portion
200: receptor 210: outer portion
300: control board
400: heat transfer unit
510: external terminal 520: internal terminal
600: sealing member
610: the first fitting portion 620: the second fitting portion

Claims (12)

A pump housing containing a motor;
Receptacle fitted to one side of the pump housing in an open shape on one side;
A control plate attached to one surface of the pump housing; And
A heat transfer part made of a liquid silicone material applied between one surface of the pump housing and the control plate to attach the control plate;
Including,
A depression is formed on one surface of the pump housing, the heat transfer portion is applied to the depression portion, and the control plate is installed to interview the heat transfer portion applied to the depression portion to be attached to one surface of the pump housing. Electric water pump characterized by.
delete The method of claim 1,
The pump housing
Inserts protruding to one side and the heat transfer portion is applied to one surface and
It is formed on the outside of the insertion portion and includes an outer portion to interview the receptor,
The electric water pump further comprises a sealing member formed between the outer portion and the container.
The method of claim 3,
The sealing member is an electric water pump, characterized in that the liquid silicone.
The method of claim 4, wherein
One side of the outer portion is formed with a first fitting portion formed in the shape of a protrusion or groove,
On one surface of the receptor in contact with the outer portion is formed a second fitting portion formed in the shape of a protrusion or groove to correspond to the first fitting portion,
The liquid silicone is an electric water pump, characterized in that applied to the first fitting portion.
The method of claim 1,
An external terminal formed of a conductor and penetrating the receptor to electrically connect the control board to an external power source;
An internal terminal formed of a conductor and electrically connecting the motor and the control plate through the pump housing and the receiver.
Electric water pump comprising a further.
The method of claim 6,
The receiver, the external terminal and the terminal from within the electric water pump, characterized in that produced by insert injection.
The method of claim 1,
An electric water pump further comprises a cover installed to cover the control plate on one side of the container.
A pre-manufacturing step of manufacturing the pump housing and the receptor, wherein the outer terminal and the inner terminal are penetrated through the receptor so that one end is located outside the receptor and the other end is inside the receptor;
An assembly step of installing a part of a pump including a motor inside the pump housing, assembling the container to one side of the pump housing, and connecting one end of the inner terminal to the motor;
A heat transfer part applying step of applying a heat transfer part made of a liquid silicone material to a depression formed on one surface of the pump housing;
A control plate installation step of attaching the control plate to the surface of the pump housing by installing a control plate to be in contact with the heat transfer part applied to the recessed portion; And
A cover installation step of installing a cover to cover the control plate;
Method of producing an electric water pump comprising a.
The method of claim 9,
The pump housing
An insertion part protruding to one side and applying the heat transfer part;
It is formed on the outside of the insertion portion and includes an outer portion to interview the receptor,
The manufacturing method of the electric water pump
Production of an electric water pump, which is performed between the pre-manufacturing step and the heat transfer part applying step, further comprising a sealing member applying step of applying a sealing member made of a liquid silicone material between the outer part and the container. Way.
The method of claim 9,
The control plate installation step is a manufacturing method of the electric water pump, characterized in that for installing the control plate by using a press fitting.
The method of claim 9,
The control board installation step is, after installing the control board, screwed so that one end of the bolt penetrates through the control board to reach the pump housing, and the motor is connected to the ground of the control board How to make a water pump.

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