A water-cooled brushless motor-driven high-pressure pump

Abstract

The application discloses a water-cooled brushless motor-driven high-pressure pump, which comprises a pump body and a base, a brushless motor is installed on the pump body, and a water-cooling cavity for cooling the brushless motor is arranged in the pump body; the water-cooling cavity is connected with an inlet water channel and an outlet water channel in a conductive mode, a water tank and a plunger hole that are in a conductive mode are arranged in the base, the water tank is connected with the outlet water channel in a conductive mode; a connecting body is arranged between the pump body and the base, a plunger assembly is arranged in the connecting body, and the brushless motor is used for driving the plunger assembly to extend into or separate from the plunger hole; an outlet water pipe is further arranged on the base and is connected with the plunger hole in a conductive mode through a perforation. The application has the beneficial effects that: the inlet water channel and the outlet water channel are connected in a conductive mode through the water-cooling cavity, the brushless motor can be cooled when water flows into the water-cooling cavity, the effective working time of the pump is prolonged, and the brushless motor is prevented from being damaged due to high temperature; the utility model has the advantages of stable operation, good cooling effect, long service life and the like.

Description

Technical Field

[0001] This application relates to the field of high-pressure water pump technology, and in particular to a high-pressure pump driven by a water-cooled brushless motor. Background Technology

[0002] As research into the cleaning field deepens, high-pressure washers have become the primary choice for cleaning objects. High-pressure washers primarily use high-pressure water generated by a high-pressure water pump to remove dirt from object surfaces. In special cases, cleaning agents with cleaning effects can also be pressurized using the high-pressure water pump to enhance the cleaning effect. Currently, increasing the motor speed is commonly used to improve the cleaning effect of high-pressure washers. However, high motor speeds also generate high temperatures inside the motor. If these high temperatures cannot be dissipated in time, they can cause the internal insulation materials to age, thus reducing the lifespan of the high-pressure water pump.

[0003] As an emerging technology, brushless motors, lacking brushes, offer advantages such as stable operation, high speed, and long lifespan, making them ideal for high-pressure water pumps. Currently, high-pressure water pumps are primarily cooled by air cooling and water cooling. Air cooling relies on a fan to expel heat from the motor, but the cooling effect is not significant. Water cooling, on the other hand, uses water flow to remove heat from the motor; however, current water cooling systems have complex cooling circuits, often requiring separate cooling pipes, resulting in larger pump sizes. Utility Model Content

[0004] One objective of this application is to provide a high-pressure pump driven by a water-cooled brushless motor that can solve at least one of the defects in the aforementioned background technology.

[0005] To achieve at least one of the above objectives, the technical solution adopted in this application is as follows: a high-pressure pump driven by a water-cooled brushless motor, comprising a pump body and a base, wherein a brushless motor is mounted on the pump body, and a water-cooling chamber for cooling the brushless motor is provided inside the pump body; the water-cooling chamber is conductively connected to an inlet channel and an outlet channel; a water tank and a plunger hole are provided in the base, which are mutually conductive, and the water tank is conductive to the outlet channel; a connector is installed between the pump body and the base, and a plunger assembly is installed in the connector; the brushless motor is used to drive the plunger assembly to extend into / remove from the plunger hole; a water outlet pipe is also provided on the base, and the water outlet pipe is conductive to the plunger hole through a perforation.

[0006] With the above configuration, water can enter the base through the inlet and outlet channels. The brushless motor drives the plunger assembly to reciprocate, thereby pressurizing the water in the plunger orifice. The pressurized water is then discharged from the water pump through the outlet pipe. The inlet and outlet channels are connected by a water-cooling chamber. When the water flows into the water-cooling chamber, it cools the brushless motor, thereby increasing the effective working time of the pump and preventing the motor from being damaged due to high temperature.

[0007] Preferably, the connector is provided with a water inlet pipe, and a partition block is provided inside the water inlet pipe. The partition block divides the water inlet pipe into an inlet section and an outlet section. The inlet section is connected to the water inlet channel, and the outlet section is connected to the water outlet channel. This configuration allows the water inlet channel and the water outlet channel to be installed simultaneously on the water inlet pipe, thereby improving the installation stability of the water inlet channel and outlet channel and preventing bending under external forces. When the water inlet channel or outlet channel becomes blocked or damaged, it can be directly replaced, thus improving the maintenance speed of the high-pressure pump.

[0008] Preferably, the connecting body is provided with a water guiding cavity, one end of which is connected to the water outlet section and the other end of which is connected to the water tank. This configuration allows water from the water outlet channel to be transferred to the water tank for later use via the water guiding cavity.

[0009] Preferably, the base is provided with a water flow channel and a pressure regulating valve assembly communicating with the water flow channel, and the outlet pipe is connected to the plunger hole through the water flow channel. With this configuration, water in the plunger hole can be discharged to the outlet pipe through the water flow channel, and the pressure regulating valve assembly can be used to regulate the air pressure inside the high-pressure pump, ensuring that the internal air pressure is always within a safe range to prevent excessive pressure from damaging the pump. When the pressure inside the pump is too high, the pressure regulating valve assembly will open to release pressure until the pressure inside the pump is within a safe range before closing.

[0010] Preferably, a one-way valve assembly for restricting water flow direction is installed in the water tank, and the plunger assembly is used to pressurize the water in the plunger orifice in conjunction with the one-way valve. This configuration prevents backflow of water in the plunger orifice through the one-way valve assembly. When the plunger assembly compresses the internal space of the plunger orifice, the one-way valve assembly seals the orifice, ensuring that the water in the plunger orifice can only be squeezed out through the outlet pipe.

[0011] Preferably, the one-way valve assembly includes a valve core and a valve seat. The valve seat is fixedly installed at the connection between the water tank and the plunger hole. The valve seat has a valve hole, and the valve core is slidably installed in the valve hole, which is used to seal the valve hole. With this configuration, when the high-pressure pump is working, water in the water tank can push open the valve core and enter the plunger hole through the valve hole. When the plunger assembly moves downward, the water flow will squeeze the valve core and seal the valve hole, thereby forcing the water in the plunger hole into the perforation. Since the valve core only fits against the valve seat, it will not damage the interior of the base. When the valve seat is damaged, it can be directly replaced, thus reducing the maintenance cost of the high-pressure pump.

[0012] Preferably, the valve core has a limiting part and a flow part at both ends. The limiting part is used to block the valve hole, and the flow part has a through hole. The limiting part is close to the plunger hole, and the flow part is close to the water tank. With this configuration, the limiting part and the flow part can limit the two ends of the valve core respectively, preventing the valve core from disengaging from the valve hole. When the limiting part cooperates with the valve hole, it can block the plunger hole, preventing water in the plunger hole from being squeezed into the water tank during pressurization. When the flow part cooperates with the valve core, water in the water tank can enter the plunger hole through the through hole.

[0013] Preferably, an elastic element is sleeved on the valve core, the elastic element being used to define the initial position of the valve core. With this configuration, when the plunger assembly is pressurized, the valve core moves downward and the elastic element contracts to seal the plunger orifice; when the plunger assembly stops pressurizing, the elastic element pushes the valve core upward to release the sealing effect on the plunger orifice.

[0014] Preferably, the pump body is further provided with a drive assembly that cooperates with the brushless motor. The drive assembly is used to drive the plunger assembly closer to / away from the plunger orifice. With this configuration, when the motor is operating, the drive assembly can push the plunger assembly to move in a direction closer to the plunger orifice, thereby pressurizing the water within the plunger orifice.

[0015] Preferably, the plunger assembly includes a plunger rod and a spring sleeved with the plunger rod. The connecting body has a mounting hole, and the plunger rod is slidably mounted within the mounting hole. A limit block is provided at one end of the plunger rod near the drive assembly. One end of the spring abuts against the limit block, and the other end abuts against the connecting body. This configuration allows the initial position of the plunger rod to be limited by the supporting action of the spring and the limit block. In the initial state, the spring supports the plunger rod to ensure that the water tank and the plunger hole are in a conductive state. When the plunger rod compresses the internal space of the plunger hole under the action of the drive assembly, the limit block compresses the spring and stores elastic force. When the plunger rod separates from the drive assembly, the spring pushes the plunger rod upward and returns it to its initial position.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: Water can enter the base through the inlet and outlet channels. The brushless motor drives the plunger assembly to reciprocate, thereby pressurizing the water in the plunger orifice. The pressurized water is then discharged from the pump through the outlet pipe. The inlet and outlet channels are connected by a water-cooling chamber. When the water flows into the water-cooling chamber, it cools the brushless motor, thereby increasing the effective working time of the pump and preventing the motor from being damaged due to high temperature.

[0017] The one-way valve assembly prevents backflow of water within the plunger orifice. When the plunger assembly compresses the internal space of the plunger orifice, the one-way valve assembly seals the orifice, ensuring that water within the orifice is only forced out through the outlet pipe. Since the valve core only contacts the valve seat, it does not damage the internal components of the connector. When the valve seat is damaged, it can be directly replaced, thus reducing the maintenance cost of the high-pressure pump. This invention offers stable operation, excellent cooling performance, and a long service life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the high-pressure pump in this application.

[0019] Figure 2 This is a schematic diagram of the cooperative structure of the pump body and the brushless motor in this application.

[0020] Figure 3 This is a schematic diagram of the base structure in this application.

[0021] Figure 4 This is a schematic diagram of the installation structure of the plunger assembly in this application.

[0022] Figure 5 This is a cross-sectional structural diagram of the connector in this application.

[0023] Figure 6 This is a schematic diagram of the one-way valve assembly in this application.

[0024] In the diagram: 1. Pump body; 11. Water-cooled cavity; 100. Brushless motor; 2. Base; 21. Piston hole; 22. Water outlet pipe; 200. Water inlet channel; 210. Perforation; 3. Connector; 31. Water inlet pipe; 32. Water guide cavity; 300. Water outlet channel; 310. Partition block; 4. One-way valve assembly; 41. Valve core; 42. Valve seat; 43. Elastic element; 400. Pressure regulating valve assembly; 5. Piston assembly; 51. Piston rod; 52. Spring; 53. Limiting block; 500. Drive assembly. Detailed Implementation

[0025] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0026] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of this application.

[0027] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0028] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0029] One aspect of this application provides a water-cooled brushless motor-driven high-pressure pump, one preferred embodiment of which is, for example... Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the pump includes a pump body 1 and a base 2. A brushless motor 100 is mounted on the pump body 1. A water-cooling chamber 11 for cooling the brushless motor 100 is provided inside the pump body 1. An inlet channel 200 and an outlet channel 300 are connected to the water-cooling chamber 11. Water can enter the water-cooling chamber 11 through the inlet channel 200 to dissipate heat from the brushless motor 100, and then the water in the water-cooling chamber 11 is discharged through the outlet channel 300. The flow of water carries away the heat from the brushless motor 100, thereby improving the heat dissipation effect of the high-pressure pump. The base 2 has a water tank and a plunger hole 21 that are interconnected. The water tank is connected to the outlet channel 300 to ensure that water in the outlet channel 300 can enter the plunger hole 21 for pressurization. A connector 3 is installed between the pump body 1 and the base 2. A plunger assembly 5 is installed inside the connector 3. The brushless motor 100 is used to drive the plunger assembly 5 to extend into / remove from the plunger hole 21. When the high-pressure pump is running, the plunger assembly 5 reciprocates under the drive of the brushless motor 100, thereby pressurizing the water in the plunger orifice 21. The base 2 is also provided with a water outlet pipe 22, and a through hole 210 is provided on the side of the plunger orifice 21. The water outlet pipe 22 and the plunger orifice 21 are connected through the through hole 210, so that the pressurized water is discharged from the water pump through the water outlet pipe 22.

[0030] Understandably, compared to traditional air-cooled heat dissipation, the water inlet channel 200 in this application can continuously supply water to the water-cooling chamber 11. The flow of water carries away the heat attached to the brushless motor 100, which can further improve the heat dissipation effect of the brushless motor 100, thereby increasing the effective working time of the pump and preventing the motor from being damaged due to high temperature.

[0031] Furthermore, such as Figure 1 and Figure 5 As shown, the connector 3 is equipped with a water inlet pipe 31, and a partition block 310 is installed inside the water inlet pipe 31. The partition block 310 is used to partition the interior of the water inlet pipe 31, dividing the water inlet pipe 31 into an inlet section and an outlet section. The water inlet channel 200 is installed on the side of the inlet section and communicates with its interior, while the water outlet channel 300 is installed on the side of the outlet section and communicates with its interior. In this way, the two ends of the water inlet channel 200 and the water outlet channel 300 can be fixedly connected to the outlet pipe 22 and the water cooling chamber 11, respectively, thereby improving the installation stability of the water inlet channel 200 and the water outlet channel 300 and preventing bending under external forces. When the water inlet channel 200 or the water outlet channel 300 becomes blocked or damaged, it can be directly replaced, thereby improving the maintenance speed of the high-pressure pump.

[0032] Specifically, such as Figure 3 and Figure 5As shown, a water guiding cavity 32 is provided inside the connecting body 3. One end of the water guiding cavity 32 is connected to the water outlet section, and the other end is connected to the water tank. When the high-pressure pump starts, the water first enters the water cooling cavity 11 through the water inlet pipe 31 to cool the brushless motor 100. After cooling, the water enters the water outlet pipe 22 and then passes through the water outlet section and the water guiding cavity 32 in sequence before entering the water tank for standby.

[0033] In this embodiment, as Figure 3 As shown, a water flow channel is provided on the base 2. The structure of the water flow channel is similar to a three-way valve. One outlet of the water flow channel is equipped with a pressure regulating valve assembly 400, and the other outlet is connected to the water outlet pipe 22. The inlet of the water flow channel is connected to the plunger hole 21 to ensure that the high-pressure water in the plunger hole 21 can be discharged into the water outlet pipe 22 through the water flow channel. The pressure regulating valve assembly 400 can be used to regulate the air pressure in the high-pressure pump, so that the internal air pressure is always kept within a safe range to avoid damage to the water pump due to excessive pressure. When the pressure in the water pump is too high, the pressure regulating valve assembly 400 will open and release pressure until the pressure in the water pump is within a safe range before closing.

[0034] It should be noted that when the plunger assembly 5 pressurizes the plunger hole 21, the water in the plunger hole 21 may flow back into the water tank under pressure, resulting in an insignificant pressurization effect.

[0035] To address the aforementioned issues, in some embodiments of this application, a one-way valve assembly 4 for restricting water flow direction is installed inside the water tank, and a plunger assembly 5 can cooperate with the one-way valve to pressurize the water in the plunger orifice 21. The function of the one-way valve is to prevent the water in the plunger orifice 21 from flowing into the water tank under the pressure of the plunger assembly 5; when the plunger assembly 5 is pressed down, the one-way valve assembly 4 can block the plunger orifice 21, ensuring that the water in the plunger orifice 21 can only be squeezed out to the outlet pipe 22 for discharge.

[0036] Specifically, such as Figure 6 As shown, the one-way valve assembly 4 includes a valve core 41 and a valve seat 42. The valve seat 42 is fixedly installed at the connection between the water tank and the plunger hole 21. The installation method of the valve seat 42 includes, but is not limited to, threaded installation and snap-fit ​​installation. A valve hole is provided in the valve seat 42, and the valve core 41 is slidably installed in the valve hole. The valve core 41 and the valve hole seal the water in the plunger hole 21 through the sealing cooperation. When the high-pressure pump is working, the water in the water tank can push open the valve core 41 and enter the plunger hole 21 through the valve hole. When the plunger assembly 5 moves down, it will squeeze the valve core 41 through the water flow and seal the valve hole, thereby squeezing the water in the plunger hole 21 into the perforation 210. Since the valve core 41 only fits against the valve seat 42, it will not cause damage to the inside of the base 2. When the valve seat 42 is damaged, it can be directly replaced, thereby reducing the maintenance cost of the high-pressure pump.

[0037] Furthermore, such as Figure 6 As shown, the valve core 41 has a limiting part and a flow part at both ends. The limiting part is used to block the valve hole, and the flow part has a through hole. The limiting part is located at the end near the plunger hole 21, and the flow part is located at the end near the water tank. The limiting part and the flow part can limit the two ends of the valve core 41 respectively, preventing the valve core 41 from disengaging from the valve hole. When the limiting part cooperates with the valve hole, it can block the plunger hole 21, preventing water in the plunger hole 21 from being squeezed into the water tank during pressurization. When the flow part cooperates with the valve core 41, water in the water tank can enter the plunger hole 21 through the through hole.

[0038] Furthermore, such as Figure 6 As shown, an elastic element 43 is sleeved on the valve core 41. The elastic element 43 is used to limit the initial position of the valve core 41. To ensure that water can enter the plunger hole 21 under normal pressure, the initial position of the valve core 41 is set when the flow part is engaged with the valve hole. When the plunger assembly 5 is pressurized, the valve core 41 moves downward and the elastic element 43 contracts to seal the plunger hole 21; when the plunger assembly 5 is no longer pressurized, the elastic element 43 pushes the valve core 41 upward to release the sealing effect on the plunger hole 21.

[0039] In this embodiment, as Figure 4 As shown, the pump body 1 is also equipped with a drive assembly 500 that works with the brushless motor 100. The drive assembly 500 is used to drive the plunger assembly 5 to move closer to / away from the plunger hole 21. When the motor is working, the drive assembly 500 can push the plunger assembly 5 to move in the direction closer to the plunger hole 21, thereby pressurizing the water in the plunger hole 21.

[0040] Specifically, such as Figure 4 As shown, the plunger assembly 5 includes a plunger rod 51 and a spring 52 sleeved with the plunger rod 51. The connecting body 3 has a mounting hole, and the plunger rod 51 is slidably installed within the mounting hole. A limiting block 53 is provided at one end of the plunger rod 51 near the drive assembly 500. One end of the spring 52 abuts against the limiting block 53, and the other end abuts against the connecting body 3. The initial position of the plunger rod 51 is limited by the supporting action of the spring 52 and the limiting block 53. In the initial state, the spring 52 supports the plunger rod 51 to ensure that the water tank and the plunger hole 21 are in a conductive state. When the plunger rod 51 compresses the internal space of the plunger hole 21 under the action of the drive assembly 500, the limiting block 53 compresses the spring 52 and stores elastic force in the spring 52. When the plunger rod 51 separates from the drive assembly 500, the spring 52 pushes the plunger rod 51 upward and returns it to its initial position.

[0041] In addition, to further improve the pressurization efficiency of the high-pressure pump, the number of plunger assemblies 5 can be increased. The drive assembly 500 will sequentially drive different plunger assemblies 5 to pressurize the water in their corresponding plunger holes 21, so as to ensure that the high-pressure water pump can perform efficient and stable pressurization.

[0042] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A water-cooled brushless motor driven high-pressure pump, comprising a pump body (1) and a base (2), characterized in that, A brushless motor (100) is installed on the pump body (1), and a water-cooling chamber (11) for cooling the brushless motor (100) is provided inside the pump body (1); the water-cooling chamber (11) is connected to an inlet channel (200) and an outlet channel (300); a water tank and a plunger hole (21) are provided inside the base (2), and the water tank is connected to the outlet channel (300); a connector (3) is installed between the pump body (1) and the base (2), and a plunger assembly (5) is installed inside the connector (3); the brushless motor (100) is used to drive the plunger assembly (5) to extend into / out of the plunger hole (21); a water outlet pipe (22) is also provided on the base (2), and the water outlet pipe (22) is connected to the plunger hole (21) through a perforation (210).

2. The high-pressure pump driven by a water-cooled brushless motor as described in claim 1, characterized in that, The connector (3) is provided with an inlet pipe (31), and a partition block (310) is provided inside the inlet pipe (31). The partition block (310) divides the inlet pipe (31) into an inlet section and an outlet section. The inlet section is connected to the inlet channel (200), and the outlet section is connected to the outlet channel (300).

3. The high-pressure pump driven by a water-cooled brushless motor as described in claim 2, characterized in that, The connector (3) is provided with a water guiding cavity (32), one end of which is connected to the water outlet section and the other end is connected to the water tank.

4. The high-pressure pump driven by a water-cooled brushless motor as described in claim 1, characterized in that, The base (2) is provided with a water flow channel and a pressure regulating valve assembly (400) connected to the water flow channel. The water outlet pipe (22) is connected to the plunger hole (21) through the water flow channel.

5. The high-pressure pump driven by a water-cooled brushless motor as described in claim 1, characterized in that, The water tank is equipped with a one-way valve assembly (4) for restricting the direction of water flow, and the plunger assembly (5) is used to pressurize the water in the plunger hole (21) in conjunction with the one-way valve.

6. The high-pressure pump driven by a water-cooled brushless motor as described in claim 5, characterized in that, The one-way valve assembly (4) includes a valve core (41) and a valve seat (42). The valve seat (42) is fixedly installed at the connection between the water tank and the plunger hole (21). A valve hole is provided in the valve seat (42). The valve core (41) is slidably installed in the valve hole. The valve core (41) is used to block the valve hole.

7. The high-pressure pump driven by a water-cooled brushless motor as described in claim 6, characterized in that, The valve core (41) is provided with a limiting part and a flow part at both ends. The limiting part is used to block the valve hole, and the flow part is provided with a through hole. The limiting part is close to the plunger hole (21), and the flow part is close to the water tank.

8. The high-pressure pump driven by a water-cooled brushless motor as described in claim 7, characterized in that, An elastic element (43) is sleeved on the valve core (41), and the elastic element (43) is used to define the initial position of the valve core (41).

9. The high-pressure pump driven by a water-cooled brushless motor as described in claim 1, characterized in that, The pump body (1) is also provided with a drive assembly (500) that cooperates with the brushless motor (100). The drive assembly (500) is used to drive the plunger assembly (5) to move closer to / away from the plunger hole (21).

10. The high-pressure pump driven by a water-cooled brushless motor as described in claim 9, characterized in that, The plunger assembly (5) includes a plunger rod (51) and a spring (52) sleeved with the plunger rod (51). The connecting body (3) is provided with a mounting hole. The plunger rod (51) is slidably installed in the mounting hole. A limit block (53) is provided on one end of the plunger rod (51) near the drive assembly (500). One end of the spring (52) abuts against the limit block (53), and the other end abuts against the connecting body (3).

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