KR102578819B1 - Water pump assembly - Google Patents

Abstract

A water pump assembly is disclosed. A water pump assembly according to an embodiment of the present invention includes a casing having a predetermined volume; a cover assembled facing the casing; an inlet extending outward from the lower side of the casing and provided to supply cooling water into the interior of the casing; an outlet extending outward from the upper side of the casing so that the cooling water moved to the upper side of the casing is discharged through the inlet; a heating element located inside the casing; and a pump located at a rear end of the inlet and provided to supply the coolant into the casing through the inlet.

Description

Water pump assembly {Water pump assembly}

The present invention relates to a water pump assembly, and more specifically, to improve the efficiency of the pump by changing the positions of the inlet and outlet in communication with the casing, to improve the efficiency of heat exchange between the heating element and the cooling water, and to minimize the generation of bubbles. It relates to a water pump assembly that can be used.

Recently, regulations on exhaust gases have been strengthened in countries around the world to reduce environmental pollution caused by automobiles, and efforts to improve fuel efficiency are also reaching their limits.

Accordingly, research is being conducted on electric vehicles that use an electric motor as a driving force or hybrid vehicles that use both an engine and an electric motor as a driving force. The hybrid vehicle is driven using an engine and an electric motor. When stopped or traveling at low speeds, the hybrid vehicle is driven only by the electric motor, and when driving at high speeds or when large power is required, the engine is generally used as the driving body.

A typical vehicle heating system heats the interior of the vehicle by allowing coolant warmed by the engine to flow through a passage, and exchanging heat with air blown into the vehicle interior through a heat exchanger to raise the temperature of the air when the engine coolant passes through a heat exchanger.

However, unlike regular cars, electric vehicles do not use an engine, so a separate device is installed to heat the vehicle, and the coolant is heated and then used for heating.

The attached Figure 1 is a schematic diagram showing a conventional heating system for an electric vehicle, and is explained with reference to the drawings.

A conventional heating system for an electric vehicle includes a heater core 10 built into the air conditioning case 15, a tank 20 for storing coolant, a water pump 30 for circulating coolant, and a coolant heating type PTC heater 40. ) is connected to the pipe (5) so that the coolant circulates through each component.

The coolant circulating through the water pump 30 is heated by the coolant heating type PTC heater 40, and the heated coolant is sent to the heater core 10. The heater core 10 into which the heated coolant flows heats the air passing through the air conditioning case 15, thereby heating the interior of the vehicle.

However, since the above-described prior art requires a separate device to heat only the coolant, the package for heating is large and heavy, and the power consumption of the coolant heating type PTC heater 40 is high.

In particular, when the temperature is very low, such as in winter, the temperature of the coolant is also very low, so there is a problem that power consumption increases further when heating the very low temperature coolant using only the coolant heating type PTC heater 40.

Referring to the attached FIG. 2, in order to compensate for this, recently, a heating element (H) has been integrated into the water pump (2), but the air bubbles generated due to the heat generation of the heating element (H) are in the water pump (2). When air bubbles are accumulated on the upper inner side or are introduced from the outside of the water pump (2), a problem occurs in which a large amount of air bubbles are accumulated on the inner upper side without being discharged to the outside of the water pump (2).

If a large amount of the air bubbles are maintained inside the water pump 2 for a long period of time, they may lead to an accident due to explosion, causing a safety problem.

Additionally, when the rotor built inside the water pump (2) supplies coolant, the rotor can suck in the coolant discharged toward the outlet of the coolant, causing a decrease in the efficiency of the water pump (2).

Korea Patent Publication No. 2010-0092629 (publication date 2010. 08. 23)

The present invention was developed to solve the above problems, and is used in internal combustion engines, hybrid electric vehicles, electric vehicles, and fuel cell vehicles that perform cold starting in low-temperature outdoor air. The goal is to provide a water pump assembly that can quickly supply high-temperature coolant that has exchanged heat with the heating element to a Fuel Cell Electric Vehicle.

In order to achieve the above object, a water pump assembly according to an embodiment of the present invention includes a casing having a predetermined volume; a cover assembled facing the casing; an inlet extending outward from the lower side of the casing and provided to supply cooling water into the interior of the casing; an outlet extending outward from the upper side of the casing so that the cooling water moved to the upper side of the casing is discharged through the inlet; a heating element located inside the casing; and a pump located at a rear end of the inlet and provided to supply the coolant into the casing through the inlet.

A gasket is provided between the casing and the cover to block external outflow of coolant.

Inside the casing, a partition wall dividing the inner area into an upper and lower part is disposed in the transverse direction.

The partition wall is characterized in that it remains spaced apart from the heating element.

The partition wall is characterized in that it extends to a width corresponding to the inner width of the casing.

The partition wall is characterized in that it is inserted into fitting pieces provided on both sides of the casing facing each other.

The casing is characterized in that the upper volume communicated with the outlet is relatively larger than the lower volume communicated with the inlet.

The casing is characterized by a round portion formed at an inner corner to guide the movement of the coolant.

The casing is characterized in that the inner upper surface is provided with an inclined portion extending upwardly toward the outlet.

The casing is characterized in that it surrounds the pump from the outside.

The heating element is characterized in that it is arranged perpendicular to the cooling water supplied to the casing via the inlet.

A mounting cover is provided at the rear end of the inlet so that the pump is mounted in close contact with the rear of the inlet.

The pump includes an impeller for supplying coolant introduced through the inlet to the casing; a rotor housing in which the impeller is stored; an inverter located behind the rotor housing; It includes a rotor casing in which the impeller, rotor housing, and inverter are all accommodated.

A water pump assembly according to another embodiment of the present invention includes a casing having a predetermined volume; a cover assembled facing the casing; an inlet extending outward from the lower side of the casing and provided to supply cooling water into the interior of the casing; an outlet extending outward from the upper side of the casing so that the cooling water moved to the upper side of the casing is discharged through the inlet; a heating element located inside the casing; a pump mounted on the casing to pressurize the coolant flowing in through the inlet to exchange heat with the resistance heating element and then discharge it through the outlet; and a main bulkhead extending laterally to vertically partition the inner area of the casing. It includes a branch partition extending from the main partition towards an upper side of the casing.

A plurality of opening holes are formed in the main partition or the branch partition to allow the cooling water to pass through.

Embodiments of the present invention are intended to perform cooling by supplying high-temperature coolant to an engine or heater and battery that performs cold starting through efficient heat exchange between the coolant supplied to the water pump assembly and the heating element.

In embodiments of the present invention, when the heating element and the pump are assembled with each other, they can be mounted as one piece, reducing the overall volume and improving the degree of freedom when designing the surrounding layout.

Embodiments of the present invention improve the efficiency of the pump and minimize the generation of unnecessary bubbles when supplying coolant into the casing.

In embodiments of the present invention, the movement direction of the coolant supplied from the pump to the casing matches the inlet supplied to the casing, thereby minimizing the generation of resistance.

Embodiments of the present invention improve the heat transfer efficiency of coolant, allowing high-temperature coolant to be quickly supplied to electrical components under cold starting conditions.

1 is a schematic diagram showing a conventional heating system for an electric vehicle.
Figure 2 is a half-sectional perspective view showing a conventional water pump.
Figure 3 is an exploded perspective view of a water pump assembly according to an embodiment of the present invention.
Figure 4 is a combined perspective view of a water pump assembly according to an embodiment of the present invention.
Figure 5 is a diagram illustrating the water pump assembly according to an embodiment of the present invention in an assembled state with internal components transparently visible.
Figure 6 is a perspective view showing a partition wall provided in a water pump assembly according to an embodiment of the present invention.
Figure 7 is a cross-sectional view showing the assembled state of a partition provided in a water pump assembly according to an embodiment of the present invention.
Figure 8 is a side view showing an inclined portion provided in a water pump assembly according to an embodiment of the present invention.
Figure 9 is a perspective view showing a water pump assembly according to another embodiment of the present invention.
Figure 10 is a perspective view showing the main partition and branch partitions of the water pump assembly according to an embodiment of the present invention.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. The thickness of lines or sizes of components shown in the attached drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are terms defined in consideration of functions in the present invention, and may vary depending on the intention of the user or operator or precedent. Therefore, definitions of these terms should be made based on the content throughout this specification.

Preferred embodiments according to the present invention will be described in detail with reference to the attached drawings. Figure 3 is an exploded perspective view of a water pump assembly according to an embodiment of the present invention, Figure 4 is a combined perspective view of a water pump assembly according to an embodiment of the present invention, and Figure 5 is an exploded perspective view of a water pump assembly according to an embodiment of the present invention. It is a diagram showing the internal components of the water pump assembly in an assembled state, and Figure 6 is a perspective view showing a partition provided in the water pump assembly according to an embodiment of the present invention, and Figure 7 is a This is a cross-sectional view showing the assembled state of a partition provided in a water pump assembly according to an embodiment of the present invention.

Referring to the attached FIGS. 3 to 5, the water pump assembly 1 according to an embodiment of the present invention is used for an internal combustion engine, a hybrid electric vehicle, an electric vehicle, and fuel. In conditions where the outdoor temperature remains below freezing in winter, such as in a fuel cell electric vehicle, the coolant supplied to the engine, the coolant supplied to the battery, or the coolant supplied to the radiator provided to heat the vehicle interior is quickly heated. The goal is to ensure stable operation or heating.

To this end, the present invention provides optimal heat exchange between the heating element 300 provided inside the water pump assembly 1 and the cooling water, so that the extended path of the heating element 300 extends to be curved multiple times as shown in the drawing. do.

The water pump assembly 1 forms an overall appearance by assembling a casing 100 and a cover 200, and a heating element 300 is provided inside the casing 100.

The casing 100 has an inlet 102 located at the bottom and an outlet 104 located at the top, and a pump 400 for introducing coolant into the casing 100 is provided.

To explain this in more detail, the casing 100 is configured in the form of a rectangular parallelepiped with a predetermined volume, and is divided into an upper part and a lower part based on a partition wall 500 (see FIG. 6), which will be described later.

The casing 100 is formed so that the upper volume in communication with the outlet 104 is relatively larger than the lower volume in communication with the inlet 102. The reason why the upper volume is formed large is so that the pump 400, which will be described later, is installed in close contact with the casing 100, and this prevents the phenomenon of complicating the surrounding layout by reducing the overall volume of the water pump assembly 1. It can be minimized.

A gasket 50 is provided between the casing 100 and the cover 200 to block external outflow of coolant, and the gasket 50 is in close contact with the edges of the casing 100 and the cover 200. The status is maintained. Therefore, the coolant does not leak to the outside of the casing 100 and stably exchanges heat with the heating element 300 before being supplied to the components that require supply.

The pump 400 according to this embodiment includes an impeller 410 for supplying coolant flowing in through the inlet 102 to the casing 100, a rotor housing 420 in which the impeller 410 is accommodated, and , includes an inverter 430 located at the rear of the rotor housing 420, and a rotor casing in which the impeller 410, the rotor housing 420, and the inverter 430 are all accommodated.

When the pump 400 is fully assembled, it is assembled in a volume smaller than that of the casing 100, and does not protrude outward even when assembled in the casing 100, reducing the overall volume and improving the freedom of arrangement of electrical components according to the surrounding layout. do.

Referring to the attached FIG. 6, the casing 100 according to this embodiment has a round portion 106 formed at the inner corner to guide the movement of the coolant. The round part 106 can minimize the phenomenon of coolant not flowing at the corner of the casing 100, as shown in the drawing.

For example, when the round part 106 is formed at the lower edge of the casing 100 as shown in the drawing, it can guide the flow of coolant from the bottom to the top.

In this case, the moving flow of the coolant can be guided from the lower side to the upper side of the casing 100, so that the flow inside the casing 100 is evenly distributed in the inner area of the casing 100 and then flows out through the outlet 104.

Therefore, heat exchange with the heating element 300 can be performed by maximally utilizing the limited internal area of the casing 100.

Referring to the attached FIGS. 6 to 8, bubbles are generated in the casing 100 as the coolant moves, and the bubbles are most preferably discharged through the outlet 104. In this embodiment, in order to more easily discharge the bubbles generated inside the casing 100 through the outlet 104, the inner upper surface of the casing 100 has an inclined portion extending upwardly toward the outlet 104 ( 108) is provided.

When bubbles are generated, the inclined portion 108 can guide the bubbles in the direction where the outlet 104 is located, thereby minimizing the amount of bubbles that may remain unnecessarily inside the casing 100.

The casing 100 has a structure that surrounds the pump 400 from the outside. The reason for having this structure is to improve space utilization by reducing unnecessary volume due to installation of the water pump assembly 1, and to improve space utilization by reducing the size of the pump 400. ), it is possible to achieve stable movement of the coolant supplied to the casing 100, thereby simultaneously improving the efficiency of the pump 400.

The inlet 102 extends outward from the lower side of the casing 100 and is provided to supply cooling water into the interior of the casing. The inlet 102 and the outlet 104 may have the same diameter, or the inlet and outlet 104 may have different diameters.

Since the inlet 102 is located on the lower side of the casing 100, the coolant flowing in through the inlet 102 moves from the inner lower part to the upper side of the casing 100 and is then located on the upper side of the casing 100. It moves through the outlet 104.

When the inlet 102 is located on the lower side rather than the upper side of the casing 100, the cooling water sucked from the pump 400 is supplied to the casing 100 in a state consistent with the direction in which it flows into the inlet 102. As a result, the direction of movement of the coolant can be matched, thereby minimizing the generation of unnecessary bubbles.

In addition, as the pump 400 operates, coolant can be supplied to the inside of the casing 100 without any resistance, thereby improving efficiency, and the temperature can be quickly raised through heat exchange with the heating element 300, thereby increasing the heat transfer efficiency of the coolant. It improves.

In particular, when a large amount of coolant flows into the casing 100, bubbles generated inside may be a problem. However, in this embodiment, most of the bubbles generated in the casing 100 can be moved to the upper inner part of the casing 100. This also makes it easier to expel air bubbles.

The casing 100 has a partition wall 500 that divides the inner area into an upper and lower portion, which is disposed in the transverse direction. As shown in the drawing, the partition wall 500 uses a plate with a predetermined thickness and is provided to prevent coolant from moving directly from the inside of the casing 100 toward the outlet 104. As a result, the cooling water is moved to the outlet 104 after maximum heat exchange is achieved with the heating element 300.

The installation location of the partition wall 500 is located at the top of the pump 400 and is maintained at a distance from the heating element 300, so it does not significantly impede the movement of coolant inside the casing 100.

When the partition wall 500 is not installed inside the casing 100, the coolant moves directly toward the outlet 104 without any particular resistance. However, when the partition wall 500 is placed inside the casing 100, the coolant moves directly toward the outlet 104. Resistance due to movement is partially increased, so the time to move toward the outlet 104 increases, which increases the heat exchange time for heat exchange with the heating element 300.

The partition wall 500 improves the efficiency of heat exchange between the heating element 300 and the cooling water so that the cooling water does not move rapidly from the inlet 102 toward the outlet 104 and exchanges heat with the heating element 300 for a sufficient period of time. It can be moved to the outlet 104.

Therefore, efficient heat exchange between the heating element 300 and the coolant through the partition wall can contribute to increasing the temperature of the coolant.

Since the partition wall 500 according to this embodiment is maintained in a state spaced apart from the heating element 300, it does not impede the movement of the coolant and the flow of the coolant can be maintained without being suddenly switched.

The partition 500 extends to a width corresponding to the inner width of the casing 100, but may also extend to a different width. When the partition wall 500 corresponds to the inner width of the casing 100 as in this embodiment, the phenomenon in which the coolant flow suddenly moves from the inner lower part to the upper part of the casing 100 can be minimized and easily maintained in the form of a vortex. Therefore, it is also advantageous in terms of heat exchange with the heating element 300.

The partition wall 500 according to this embodiment is inserted into the fitting pieces 101 provided on both sides of the casing 100 facing each other. The fitting piece 101 may be configured in a ⊂ shape, for example, but other shapes may also be used.

When the partition wall 500 is fixed by the fitting piece 101, a stable fixed state is maintained regardless of vibration or coolant flow.

The heating element 300 according to an embodiment of the present invention uses an electric resistance heating element, and the applied electrical energy is converted into thermal energy, thereby rapidly increasing the temperature of the cooling water through heat exchange with the cooling water.

It is advantageous in terms of heat exchange with cooling water to arrange the heating element 300 in a bent state as long as possible in the limited internal space of the casing 100. In particular, since the upper volume in communication with the outlet 104 of the casing 100 according to this embodiment has a relatively larger volume than the lower volume in communication with the inlet 102, the casing 100 is bent as much as possible according to the structure. This is advantageous in terms of heat exchange with the coolant.

As an example, the heating element 300 is disposed perpendicular to the cooling water supplied to the casing via the inlet 102. In this case, the area in contact with the cooling water on the heating element 300 can be increased, thereby increasing the temperature of the cooling water. can be achieved more quickly.

The pump 400 according to this embodiment is located at the rear end of the inlet 102 and is provided to supply the cooling water into the casing 100 through the inlet 102.

The pump 400 is provided with a mounting cover 109 (see FIG. 3) at the rear end of the inlet 102 so that it is mounted in close contact with the rear of the inlet 102. The mounting cover 109 ensures stable assembly and operation of the pump 400 and matches the direction of movement of the coolant flowing in through the inlet 102 and the direction in which the coolant is supplied to the casing 100 by the pump 400. By doing so, the efficiency of the pump 400 can be improved.

In addition, when the pump 400 operates, resistance to the fluid coolant is not generated in the inner direction of the casing 100, which is the direction in which coolant is supplied, thereby ensuring a stable supply of coolant.

In addition, while the pump 400 operates, the supply direction of the coolant supplied to the casing 100 matches the direction of movement due to the generation of bubbles, thereby minimizing problems caused by bubbles.

A water pump assembly according to another embodiment of the present invention will be described with reference to the drawings.

Referring to the attached FIGS. 9 to 10, the water pump assembly 1a according to another embodiment of the present invention includes a casing 1000 having a predetermined volume and a cover assembled facing the casing 1000. (2000), an inlet 1020 extending outward from the lower side of the casing 1000 and provided to supply cooling water into the inside of the casing 1000, and the casing 1000 through the inlet 1020. ), an outlet 1040 extending outward from the upper side of the casing 1000 to discharge the coolant moved to the upper side, a heating element 3000 located inside the casing 1000, and the inlet 1020. A pump 4000 mounted on the casing 1000 to pressurize the coolant introduced through the casing 1000 to perform heat exchange with the heating element 3000 and then discharge it through the outlet 1040, and move the inner area of the casing 1000 up and down. It includes a main partition wall 5000 extending laterally to partition the main partition wall 5000 and a branch partition wall 5100 extending from the main partition wall 5000 toward the upper side of the casing 1000.

The water pump assembly (1a) according to another embodiment of the present invention has the same or similar main components as the casing (1000), cover (2000), heating element (3000), and pump (4000) as the above-described embodiment. Therefore, detailed description is omitted.

In this embodiment, a branch partition 5100 is formed upward from the main partition 5000, and the branch partition 5100 changes the flow of the coolant moving toward the outlet 1040 to connect the heating element 3000 and the coolant. Improves heat exchange efficiency.

As the time for the coolant to move from the casing 1000 toward the outlet 1040 is shortened, the heat exchange efficiency may decrease, so the movement flow of the coolant is delayed for a certain period of time through the main partition 5000 and the branch partition 5100. , the temperature of the coolant supplied to the electrical equipment through the outlet 1040 can be increased through heat exchange with the heating element 3000 during the delayed time.

The branch partition wall 5100 according to this embodiment is composed of one or more branches in consideration of the layout of the heating element 3000 of the main partition wall 5000, and the extended length is not limited to the length shown in the drawing.

A plurality of opening holes 5010 are formed in the main partition 5000 or the branch partition 5100 to allow the coolant to pass through. The opening hole 5010 is formed to facilitate easy movement of the coolant, and the coolant can move through various paths to move from area A to area B, but the movement flow mainly through the branch partition 5100 is maintained. .

That is, since it moves through the opening hole 5010 formed in the branch partition 5100, high-temperature coolant can be stably supplied to the electrical equipment through the outlet 1040.

Therefore, it is possible to quickly increase the temperature of the heater or battery provided in a hybrid vehicle, fuel cell vehicle, or electric vehicle to ensure stable vehicle operation.

The branch partition 5100 can be configured in plural, and in this case, the sizes are different from each other so that the movement flow of the coolant is not delayed too much, and the arrangement position is also perpendicular to the main partition 5000 or in the direction of the main partition 5000. It can be positioned in various ways in any of the longitudinal directions.

For example, when the outlet 1040 extends vertically from the upper surface of the casing 1000, a large amount of air bubbles can collect on the inner upper surface of the casing 1040 and then be easily discharged to the outside through the outlet 1040. there is.

Therefore, bubbles can be easily discharged by the moving flow of the coolant, thereby maintaining conditions for improved bubble discharge and stable heat exchange.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and various modifications and other equivalent embodiments can be made by those skilled in the art. You will understand that it is possible. Therefore, the true technical protection scope of the present invention should be determined by the scope of the patent claims below.

1, 1a: Water pump assembly
100, 1000: Casing
101: Fitting piece
104: round part
106: inclined portion
108: mounting cover
200, 2000: Cover
102, 1020: inlet
104, 1040: outlet
300, 3000: Heating element
400, 4000: pump
500: Bulkhead
5000: Main bulkhead
5100: branch bulkhead
5010: opening hole

Claims (16)

Casing 100 having a predetermined volume;
A cover 200 assembled facing the casing 100;
an inlet 102 provided to supply cooling water into the casing 100;
an outlet 104 provided to discharge the cooling water inside the casing 100 and disposed higher than the inlet 102;
A heating element 300 located inside the casing 100; and
A water pump assembly including a pump (400) located at a rear end of the inlet (102) and provided to supply the coolant into the casing (100) through the inlet (102). According to claim 1,
A water pump assembly including a gasket 50 between the casing 100 and the cover 200 to block external outflow of coolant. According to claim 1,
A water pump assembly, characterized in that a partition wall (500) is disposed in the transverse direction inside the casing (100) to divide the inner area into an upper and lower part. According to clause 3,
A water pump assembly in which the partition wall (500) is maintained spaced apart from the heating element (300). According to clause 3,
The water pump assembly, wherein the partition wall (500) extends to a width corresponding to the inner width of the casing (100). According to clause 3,
The water pump assembly is characterized in that the partition wall (500) is inserted into the fitting piece (101) provided on both sides of the casing (100) facing each other. According to claim 1,
A water pump assembly, wherein the casing (100) has an upper volume in communication with the outlet (104) that is relatively larger than a lower volume in communication with the inlet (102). According to claim 1,
The water pump assembly is characterized in that the casing (100) has a round portion (106) formed at an inner corner to guide the movement of the coolant. According to claim 1,
The casing 100 is,
A water pump assembly, characterized in that the inner upper surface is provided with an inclined portion (108) extending upwardly toward the outlet (104). According to claim 1,
The casing (100) is a water pump assembly characterized in that it surrounds the pump from the outside. According to claim 1,
The water pump assembly, characterized in that the heating element (300) is arranged perpendicular to the cooling water supplied to the casing (100) via the inlet (102). According to claim 1,
A water pump assembly, characterized in that a mounting cover 108 is provided at the rear end of the inlet 102 so that the pump 400 is mounted in close contact with the rear of the inlet 102. According to claim 1,
The pump 400 includes an impeller 410 for supplying cooling water introduced through the inlet 102 to the casing 100;
a rotor housing 420 in which the impeller 410 is accommodated;
an inverter 430 located at the rear of the rotor housing 420;
A water pump assembly including a rotor casing (440) in which the impeller (410), rotor housing (420), and inverter (430) are all accommodated. A casing (1000) having a predetermined volume;
A cover (2000) assembled facing the casing (1000);
an inlet 1020 extending outward from the lower side of the casing 1000 and provided to supply cooling water into the interior of the casing 1000;
an outlet 1040 extending outward from the upper side of the casing 1000 to discharge the cooling water moved to the upper side of the casing 1000 through the inlet 1020;
A heating element 3000 located inside the casing 1000;
A pump 4000 mounted on the casing 1000 to pressurize the coolant flowing in through the inlet 1020 to exchange heat with the heating element 3000 and then discharge it through the outlet 1040;
a main partition 5000 extending in the transverse direction to vertically partition the inner area of the casing 1000; and
A water pump assembly including a branch partition wall (5100) extending from the main partition wall (5000) toward the upper side of the casing (1000). According to claim 14,
A water pump assembly in which a plurality of opening holes 5010 are formed in the main partition 5000 or the branch partition 5100 to allow the coolant to pass through.



delete

Images