Water pump

Abstract

The invention belongs to the technical field of water pumps, and particularly relates to a water pump which comprises a driving motor, an impeller and a water pump, the pump head is provided with a low-pressure cavity, a mixing cavity and a high-pressure cavity which are arranged in the axial direction of the driving motor, the low-pressure cavity is connected with a water inlet pipe, the high-pressure cavity is connected with a water outlet pipe, the impeller is arranged in the mixing cavity, and a first water passing opening is formed between the mixing cavity and the low-pressure cavity; a second water passing opening is formed between the mixing cavity and the high-pressure cavity; and the pressure stabilizing unit is connected with the high-pressure cavity and is used for stabilizing the pressure in the high-pressure cavity. According to the water pump, the low-pressure cavity, the mixing cavity and the high-pressure cavity are arranged in the axial direction of the driving motor, water flow is driven through the impeller, the whole water pump tends to be transversely arranged, and the overall size of the water pump is effectively reduced; and meanwhile, the impeller is adopted to drive water flow, so that the water pump has self-suction capacity and is more flexible to use.

Description

Technical Field

[0001] This application belongs to the field of water pump technology, and specifically refers to a water pump. Background Technology

[0002] Referring to Chinese Patent 2022220145770, which discloses a pump head and a self-priming pump, most existing self-priming pumps use a sand casting process to manufacture the pump head into a vertical housing. An air tank for controlling the internal pressure balance of the pump head is connected to one side of the pump head via a connecting pipe. Because the pump head is manufactured using sand casting, the pump housing is rough, and the manufacturing process is cumbersome. Furthermore, since existing air tanks are fixed to the pump head via connecting pipes, the connection process for the air tank is tedious and the manufacturing efficiency is low.

[0003] Patent TW581153U describes a horizontally mounted pump structure, comprising a motor, several impellers, an inlet seat, and an outlet seat. The inlet pipe is located between the motor and the impellers, and the outlet pipe is located after the inlet and outlet seats. Water flows through the outlet pipe and is output via the rotation of the impellers. While this horizontally mounted pump simplifies the overall gas tank installation, it still suffers from the following drawbacks: 1. The pump body in this patent uses a multi-stage impeller to achieve water pumping. The multi-stage impeller has the disadvantages of low head and lack of self-priming function, but it has the advantage of large internal water flow. However, in actual household scenarios, the huge water flow provided by the multi-stage impeller far exceeds the actual household needs. On the contrary, the lack of self-priming function makes the water pump unsuitable for household scenarios.

[0004] 2. The pump body in this patent uses a multi-stage impeller, which results in a large internal housing volume. Therefore, the outlet pipe and inlet pipe need to be protruded on the housing, which affects the overall volume of the pump. Summary of the Invention

[0005] The purpose of this application is to provide a water pump.

[0006] The purpose of this application is achieved as follows: A water pump, comprising: A drive motor rotates to drive an impeller. The pump head has a low-pressure chamber, a mixing chamber, and a high-pressure chamber arranged along the axial direction of the drive motor. A voltage stabilizing unit, connected to the high-pressure chamber, is used to stabilize the pressure in the high-pressure chamber; The pump head includes at least an inlet housing, a mixing housing, and an outlet housing arranged along the axial direction of the drive motor; the low-pressure chamber is formed inside the inlet housing, and the low-pressure chamber is connected to an inlet. The mixing shell is installed on the water inlet shell, and a mixing cavity is formed between the mixing shell and the water inlet shell; a first water outlet is provided between the mixing cavity and the low-pressure cavity, and a second water outlet is provided between the mixing cavity and the high-pressure cavity; a first spiral flow channel is formed inside the mixing cavity, and the first water outlet and the second water outlet are respectively located at both ends of the first spiral flow channel, so that water flows into the mixing cavity from the first water outlet, flows along the first spiral flow channel, and then enters the high-pressure cavity from the second water outlet; The water outlet housing is disposed outside the water inlet housing; the water outlet housing cooperates with the pressure stabilizing unit to form the high-pressure chamber; the high-pressure chamber is covered outside the mixing housing; the high-pressure chamber is connected to a water outlet, and the impeller is disposed in the mixing chamber.

[0007] Furthermore, the water inlet housing is fixed to the drive motor, the motor shaft of the drive motor passes through the water inlet housing, and the side wall of the motor shaft and the water inlet housing are in a sliding sealing fit. The mixing shell is provided on the first side cover of the water inlet shell; the first side cover is also provided with a constricted protrusion located in the mixing chamber, and the first spiral flow channel is formed outside the constricted protrusion. The water inlet shell and the mixing shell at both ends of the first spiral flow channel are respectively provided with a first water outlet and a second water outlet. The motor shaft extends out of the water outlet housing and is located on the constricted protrusion. The motor shaft rotates to drive an impeller located in the mixing chamber. The mixing shell has a second spiral flow channel formed on its exterior, which allows water to flow along the second spiral flow channel to the outlet.

[0008] Furthermore, the mixing chamber is located on the lower side of the middle part of the high-pressure chamber; the distance between the mixing shell and the top of the high-pressure chamber is greater than the distance between the mixing shell and the bottom of the high-pressure chamber; An eccentric portion is formed between the mixing shell and the top of the high-pressure chamber, and a water outlet is provided on the eccentric portion; the second water outlet is located on the periphery of the mixing shell and in the lower part of the middle of the mixing shell.

[0009] Furthermore, the line connecting the water outlet and the center of the motor shaft is marked as line a, and the line connecting the second water outlet and the center of the motor shaft is marked as line b. The angle between line a and line b is 120~150°.

[0010] Furthermore, the second water outlet is detachably provided with a guide block, and the guide block is provided with a guide surface for contacting the water flow.

[0011] Furthermore, the pressure stabilizing unit includes an outer tank and an inner tank; the inner tank is fitted onto the water outlet shell and forms the high-pressure chamber; the outer tank is fitted onto the outside of the inner tank, and an air chamber is formed between the outer tank and the inner tank, with a flexible diaphragm in the air chamber, which divides the air chamber into two parts. The inner tank is provided with a flow divider located in the high-pressure chamber, and the flow divider is formed with a number of flow divider holes for water vapor separation.

[0012] Furthermore, the water outlet shell and the water inlet shell are either an integral structure or a separate structure; The split structure is as follows: the water outlet shell is an annular cover with an opening for eccentrically fitting onto the water inlet shell; the opening and the water inlet shell are sealed together; and an interface is formed on the periphery of the water outlet shell. The water inlet housing is provided with a support protrusion that abuts against the edge of the opening; The drive motor is provided with a fastening seat, and the fastening seat is provided with a fastener connected to the water outlet housing. The water inlet housing is located between the drive motor and the water outlet housing, and is used to position the water inlet housing located between the two by connecting the water outlet housing and the drive motor.

[0013] Furthermore, the water outlet shell, mixing shell, and outer tank are all made of thin stainless steel.

[0014] Furthermore, the outer edge of the water outlet shell is formed with an interface portion, and the outer edges of the outer tank, inner tank and diaphragm component are provided with connecting bosses that abut against the interface portion. The connecting bosses on the outer tank, inner tank and diaphragm component are stacked sequentially on the interface portion, and the water outlet shell and the pressure stabilizing unit are connected by fasteners provided on the interface portion and the connecting bosses.

[0015] Furthermore, the water inlet housing is located within the water outlet housing, and the water inlet pipe is provided with a transition pipe located within the water outlet housing and connected to the water inlet housing.

[0016] The outstanding and beneficial technical effects of this application compared to the prior art are: This application arranges the low-pressure chamber, mixing chamber, and high-pressure chamber along the axial direction of the drive motor, and uses an impeller to drive the water flow, making the overall water pump more horizontally positioned, effectively reducing the overall size of the pump. Simultaneously, the impeller-driven water flow gives the pump self-priming capability, making it more flexible to use. Furthermore, since the inlet housing, outlet housing, and mixing housing are arranged sequentially along the axial direction and stacked one on top of the other, all three housings can be made into circular structures. This structure allows the inlet housing, outlet housing, and mixing housing to be drawn from stainless steel parts. Compared to the sand-cast structure of existing self-priming pumps, stainless steel drawn inlet housings, outlet housings, and mixing housings are more durable and aesthetically pleasing. Moreover, since the mixing housing is fixed inside the outlet housing, the internal and external arrangement allows the water flow in the second spiral channel to effectively reduce the noise generated by the impeller's operation within the mixing chamber. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the water pump in Example 1.

[0018] Figure 2 This is a cross-sectional schematic diagram of the water pump in Example 1.

[0019] Figure 3 This is a schematic diagram of the pump head and voltage stabilizing unit in Example 1.

[0020] Figure 4 This is an exploded schematic diagram of the pump head in Example 1.

[0021] Figure 5 This is a schematic diagram showing the disassembly of the pump head and the voltage stabilizing unit in Example 1.

[0022] Figure 6 This is an internal schematic diagram of the voltage stabilizing unit in Example 1.

[0023] Figure 7 This is a front view of the water outlet shell in Example 1.

[0024] Figure 8 This is a schematic diagram showing the separation of the water outlet shell and the water inlet shell in Example 1.

[0025] Figure 9 This is a schematic diagram of the connection between the water inlet shell and the mixing shell in Example 1.

[0026] Figure 10 This is a schematic diagram of the interior of the water inlet shell in Example 1.

[0027] Figure 11 This is a schematic diagram of the flow guide block on the mixing shell in Example 1.

[0028] Figure 12 This is a schematic diagram of the structure in Example 1 where the guide block is installed on the water inlet shell.

[0029] Figure 13 This is a schematic diagram of the structure of the water outlet shell and the water inlet shell in Example 2.

[0030] Figure 14 This is a schematic diagram of the water outlet shell and the water inlet shell in Example 3.

[0031] Figure 15 This is a cross-sectional schematic diagram of the water outlet shell and the water inlet shell in Example 3.

[0032] Figure 16 This is a schematic diagram of the structure of the water outlet shell and the water inlet shell in Example 4.

[0033] The meaning of the labels in the diagram: 1. Drive motor; 12. Impeller; 13. Fastening base; 131. Fastener one; 14. End cover; 15. Stator; 16. Rotor; 17. Motor shaft; 2. Pump head; 21. Low-pressure chamber; 22. Mixing chamber; 23. High-pressure chamber; 3. Pressure stabilizing unit; 31. Outer tank; 32. Inner tank; 33. Gas chamber; 34. Diaphragm component; 35. Diverter frame; 351. Diverter hole; 36. Connecting boss; 4. Inlet housing; 41. Inlet pipe; 411. Inlet; 42. First outlet; 43. Support boss; 44. Narrowing boss; 461. First spiral flow channel; 462. Second spiral flow channel; 47. Cut-off section; 471. Positioning slot; 48. First side cover; 49. Second side cover; 5. Mixing shell; 51. Second water inlet; 52. Extended edge; 53. Second water outlet sidewall; 6. Outlet shell; 61. Opening; 62. Interface; 63. Outlet pipe; 631. Outlet; 64. Transition pipe; 65. Eccentric part; 7. Guide block; 71. Guide surface; 72. Clamping part; 73. Positioning part; 74. First positioning pin; 741. First pin part; 742. Second pin part; 75. Second positioning pin; 76. Large hole part; 77. Small hole part; 78. Positioning strip; 8. Install the cavity; Detailed Implementation The present application will be further described below with reference to specific embodiments: Example 1: A water pump includes a drive motor 1, a pump head 2, and a pressure stabilizing unit 3. (Combined with...) Figure 1 , 2As shown in Figure 4, the drive motor 1 is arranged horizontally, and its interior is provided with a stator 15, a rotor 16, and a motor shaft 17, which extends horizontally to one side. The pump head 2 is located in the axial direction of the drive motor 1. The pump head 2 has a low-pressure chamber 21, a mixing chamber 22, and a high-pressure chamber 23 arranged along the axial direction of the drive motor 1. The low-pressure chamber 21 is connected to a water inlet pipe 41, and the water inlet pipe 41 is provided with a water inlet 411. The high-pressure chamber 23 is connected to a water outlet pipe 63, and the water outlet pipe 63 is provided with a water outlet 631. The impeller 12 is provided in the mixing chamber 22. A first water outlet 42 is provided between the mixing chamber 22 and the low-pressure chamber 21. A second water outlet 51 is provided between the mixing chamber 22 and the high-pressure chamber 23. The pressure stabilizing unit 3 is connected to one side of the pump head 2 and is connected to the high-pressure chamber 23 to stabilize the pressure in the high-pressure chamber 23.

[0034] Combination Figure 3-5 As shown, the pump head 2 in this application includes an inlet housing 4, a mixing housing 5, and an outlet housing 6 arranged along the axial direction of the drive motor 1. The inlet housing 4 and the mixing housing 5 are connected in sequence, and the low-pressure chamber 21 and the mixing chamber 22 are respectively formed inside them. A first water inlet 42 is provided on the inlet housing 4. A high-pressure chamber 23 is provided in the outlet housing 6. The mixing housing 5 is located inside the outlet housing 6, and a second water inlet 51 is provided on one side of the mixing housing 5.

[0035] Specifically, such as Figure 3 As shown, the water inlet housing 4 is a flat, circular ring. The water inlet pipe 41 is integrally formed on the outer arc surface of the water inlet housing 4. The water inlet pipe 41 has two ends: one end has a water inlet 411 for connecting to a water source, and the other end is used to install a flow switch. The center of the circular water inlet housing 4 is for the motor shaft 17 of the drive motor 1 to pass through. The side wall of the motor shaft 17 and the water inlet housing 4 are in a sliding sealing fit, i.e., a corresponding mechanical seal is provided on the motor shaft 17. The water inlet housing 4 has a first side cover 48 and a second side cover 49 on both sides. For ease of manufacturing, the second side cover 49 of the water inlet housing 4 is detachable. The first side cover 48 is integrally formed with the water inlet housing 4, and the first water outlet 42 is provided on the first side cover 48.

[0036] refer to Figure 3-8 As shown, the mixing housing 5 is specifically a circular cover that covers the first side cover 48 of the water inlet housing 4. At this time, the first side cover 48 of the water inlet housing 4 is connected to the mixing housing 5 to form the mixing chamber 22. The motor shaft 17 of the drive motor 1 passes through the water inlet housing 4 and is located inside the mixing housing 5. The impeller 12 is installed at the end of the motor shaft 17.

[0037] like Figure 4As shown, to accommodate the normal operation of the impeller 12, a constricted boss 44 is provided on the first side cover 48 of the water inlet housing 4. The impeller 12 is located on the constricted boss 44, and a first spiral flow channel 461 corresponding to the outer edge of the impeller 12 is formed on the outer edge of the constricted boss 44. One end of the constricted boss 44 is provided with a cut-off portion 47, which extends outward to block the first spiral flow channel 461. At this time, the first water inlet 42 is located at the inlet position of the first spiral flow channel 461, that is, on one side of the cut-off portion 47, so that the water flowing from the low-pressure chamber 21 can enter the first spiral flow channel 461 through the first water inlet 42 and contact the impeller 12.

[0038] like Figure 4 , 9 The mixing housing 5 has an annular second outlet sidewall 53 in the radial direction, and the second water inlet 51 is located on the second outlet sidewall 53 of the outlet housing 6. In this application, the second water inlet 51 is located on the other side of the cut-off portion 47. Since the impeller 12 is located in the mixing chamber 22 and above the constricted protrusion 44 and the cut-off portion 47, the first water inlet 42 and the second water inlet 51 are separated by the impeller 12 abutting against the cut-off portion 47. This allows the water entering from the first water inlet 42 to flow only along the first spiral flow channel 461 and be discharged from the second water inlet 51, forming a sufficiently long flow channel for water vapor separation. The overall structure is more compact than that of existing self-priming pumps.

[0039] The water outlet shell 6 is disposed outside the mixing shell 5, such as Figure 5 , 8 As shown, the outlet housing 6 is generally an annular cover, with an opening 61 for eccentrically fitting onto the inlet housing 4, and the opening 61 and the inlet housing 4 are sealed together. Figure 8 As shown, the outlet housing 6 is a circular cover with an outer diameter larger than that of the inlet housing 4 and the mixing housing 5. The size of the opening 61 on it is adapted to the size of the inlet housing 4 and the mixing housing 5. The outer edge of the mixing housing 5 is provided with an extension edge 52, and a fastening hole is provided on the extension edge 52. The mixing housing 5 is directly fixed to the opening 61 and connected to the outlet housing 6 by the fastening. Since the mixing housing 5 is located entirely inside the outlet housing 6, a second spiral flow channel 462 is formed on the outside of the mixing housing 5. This allows water to flow out from the second water outlet 51 located on the second outlet sidewall 53 and flow along the second spiral flow channel 462 to the outlet 631.

[0040] Furthermore, the mixing chamber 22 is located on the lower side of the middle part of the high-pressure chamber 23; the distance between the mixing shell 5 and the top of the high-pressure chamber 23 is greater than the distance between the mixing shell 5 and the bottom of the high-pressure chamber 23; an eccentric part 65 is formed between the mixing shell 5 and the top of the high-pressure chamber 23, and an outlet 631 is provided on the eccentric part 65; the second water outlet 51 is provided on the periphery of the mixing shell 5 and is located in the lower part of the middle of the mixing shell 5.

[0041] refer to Figure 5 The water outlet shell 6 is generally elliptical. The opening 61 is located on the lower side of the water outlet shell 6, so that the water inlet shell 4 and the mixing shell 5 are also generally located on the lower side of the water outlet shell 6. The water outlet 631 is located on the upper side of the water outlet shell 6.

[0042] For details, please refer to the following: Figure 7 The line connecting the outlet 631 and the center of the motor shaft 17 is marked as line a, and the line connecting the second water inlet 51 and the center of the motor shaft 17 is marked as line b. The angle between line a and line b is 120°~150°. In the figure, line a and line b are marked with a dotted line. At this angle, when the outlet 631 is located above the motor shaft 17, the outlet 631 can only be located on the lower left or lower right side of the mixing shell 5. When the water flows out from the second water inlet 51, it will flow through the second spiral flow channel 462 for a certain distance until it flows to the outlet 631 on the eccentric part 65 and flows out. The setting of the eccentric part 65 can make the outlet 631 and the second water inlet 51 vertically spaced by a certain distance. This distance provides enough flow space for water vapor separation to obtain sufficient self-priming force to ensure the normal operation of the water pump in this application.

[0043] The inlet housing 4 is provided with a support boss 43 that abuts against the edge of the opening 61. The inlet housing 4 is externally provided with a fastening structure to keep it in the abutting state. The support boss 43 is formed on the edge of the boss portion of the inlet housing 4. The outer diameter of the inlet housing 4 is slightly larger than that of the opening 61, so that when the inlet housing 4 is connected to the outlet housing 6, the boss portion of the inlet housing 4 passes through the opening 61, and the support boss 43 abuts against the outer edge of the opening 61. The fastening structure includes components provided on the... In this embodiment, the fastening seat 13 on the drive motor 1 is disposed on the edge of the end cover 14 on one side of the drive motor 1. The end cover 14 on one side of the drive motor 1 abuts against the water inlet housing 4. The water outlet housing 6 is connected by a fastener 131 passing through the fastening seat 13. The fastener 131 is generally a screw. The structure of the fastening seat 13 is used to position the water inlet housing 4 located between the water outlet housing 6 and the drive motor 1, so that the water inlet housing 4 is tightly fixed on the outside of the water outlet housing 6.

[0044] Furthermore, an interface portion 62 is formed on the periphery of the water outlet housing 6, and the pressure stabilizing unit 3 that seals the first side of the water outlet housing 6 is connected through the interface portion 62. The water outlet housing 6 is hemispherical with a circular interface 62 formed on one side. The pressure stabilizing unit 3 is specifically an air tank, which includes an outer tank 31 and an inner tank 32. An air chamber 33 is formed between the outer tank 31 and the inner tank 32. A diaphragm 34 is provided in the air chamber 33. A one-way air nozzle is provided on the outer tank 31 to inflate the air chamber 33 and regulate the pressure inside the air chamber 33. The outer edges of the outer tank 31, the inner tank 32, and the diaphragm 34 are provided with connecting bosses 36 that abut against the interface 62. The connecting bosses 36 on the outer tank 31, the inner tank 32, and the diaphragm 34 are stacked sequentially on the interface. Fasteners are provided on the interface 62 and the connecting bosses 36 to connect the water outlet housing 6 and the pressure stabilizing unit 3.

[0045] After the pressure stabilizing unit 3 is installed, the high-pressure chamber 23 formed within the water outlet housing 6 is sealed by the pressure stabilizing unit. Further, for this purpose, a flow divider 35 is provided on the inner tank 32, located within the high-pressure chamber 23. Several flow dividers 35 are provided, arranged around the inner tank 32 and placed within the second spiral flow channel 462. Several flow dividers 35 are formed on the flow dividers 35 for water vapor separation. In this embodiment, the flow dividers 35 extend forward to one side of the mixing housing 5. The water flow from the second water outlet 51 moves within the high-pressure chamber 23 and contacts the flow dividers 35. Water vapor separation is achieved through the flow dividers 35 and the flow dividers 35, thereby increasing the water vapor separation effect of the water pump and obtaining better self-priming capability.

[0046] Because the outer diameter of the outlet housing 6 is larger than that of the inlet housing 4, an installation cavity 8 is formed on the outer edge of the inlet housing 4 for mounting the outlet pipe 63 and the inlet pipe 41. Figure 1 , 5 As shown, the mounting cavity 8 is formed before the drive motor 1 and the water outlet housing 6. Because of the mounting cavity 8, the user can set the water outlet pipe 63 on the outer side of the water outlet housing 6, so as to make the overall structure of the water pump more compact.

[0047] This application arranges the low-pressure chamber 21, mixing chamber 22, and high-pressure chamber 23 along the axial direction of the drive motor 1, and uses the impeller 12 to drive the water flow, making the overall water pump more horizontally positioned, effectively reducing the overall size of the water pump. Simultaneously, the impeller 12 drives the water flow, giving the water pump self-priming capability and making it more flexible to use. Furthermore, in this application, since the inlet housing 4, outlet housing 6, and mixing housing 5 are arranged sequentially along the axial direction and stacked one on top of the other, all three housings can be made into circular structures. This structure allows the inlet housing 4, outlet housing 6, and mixing housing 5 to be drawn from stainless steel parts. Compared to the sand-cast structure of existing self-priming pumps, the stainless steel drawn inlet housing 4, outlet housing 6, and mixing housing 5 are more durable and aesthetically pleasing. Moreover, since the mixing housing 5 is fixed inside the outlet housing 6, the internal and external arrangement allows the water flow through the second spiral flow channel 462 to effectively reduce the noise generated by the impeller's operation within the mixing chamber 22.

[0048] Furthermore, the second water inlet 51 is also provided with a guide block 7, which has a guide surface 71 for contacting the water flow. The guide block 7 is provided with a clamping part 72 for clamping the guide block 7 onto the second outlet sidewall 53 on one side of the second water inlet 51; the guide block 7 is also provided with a positioning part 73, which has a positioning structure for connecting the guide block 7 to the outlet housing 6 after the guide block 7 is clamped onto the second outlet sidewall 53 on one side of the second water inlet 51. Figure 4 , 10 As shown in Figure 11, the guide block 7 in this application can be made of stainless steel. The positioning part 73 is a square panel that conforms to the curvature of the second water outlet sidewall 53. One end of the positioning part 73 has an upwardly curved clamping part 72, and the clamping part 72 has a guide surface 71 formed on its outer side that contacts the water flow. When the clamping part 72 is clamped on the second water outlet sidewall 53, the guide surface 71 is located in the second water outlet 51, while the positioning part 73 is placed inside the second water outlet sidewall 53 and above the constricted protrusion 44. Positioning is achieved through this positioning structure.

[0049] The positioning structure may include a first locking hole on the positioning part 73, and a second locking hole on the second outlet sidewall 53 on one side of the second water inlet 51. A locking member connecting the positioning part 73 and the second outlet sidewall 53 is provided between the first locking hole and the second locking hole. The locking member may be a screw, and correspondingly, the first locking hole and the second locking hole may be threaded holes.

[0050] However, after prolonged use, the fasteners are prone to detaching from the first and second locking holes, requiring the user to disassemble the entire water pump for maintenance. To solve this problem, this application provides an alternative assembly method. Figure 10 , 11 As shown, the positioning structure includes a first positioning pin 74 and a second positioning pin 75. The first positioning pin 74 is disposed on the positioning part 73. The second water outlet sidewall 53 of the water outlet housing 6 is provided with a connected large hole 76 and a small hole 77. The first positioning pin 74 has a first pin part 741 with an outer diameter corresponding to the large hole 76, and a second pin part 742 that can slide between the large hole 76 and the small hole 77. The second positioning pin 75 is biasedly disposed on one end of the positioning part 73. The first side cover 48 is provided with a cut-off part 47. The flow guide block 7 is located on the cut-off part 47 and the second positioning pin 75 abuts against the cut-off part 47. The second positioning pin 75 abuts against the positioning boss to restrict the sliding of the second pin part 742 between the large hole 76 and the small hole 77.

[0051] Combination Figure 10 , 11 As shown, the cut-off portion 47 is disposed on one side of the constricted protrusion 44, near the second outlet sidewall 53. The first positioning pin 74 is integrally formed on the positioning portion 73, that is, the second pin portion 742 and the first pin portion 741 are respectively disposed inside and outside the positioning portion 73. The second pin portion 742 is strip-shaped, while the first pin portion 741 is planar, making its outer diameter much larger than that of the second pin portion 742. The large hole portion 76 and the small hole portion 77 are opened on one side of the second water outlet 51 and are connected. During installation, the first pin portion 741 can pass through the large hole portion 76, and the second pin portion 742 can be located inside the large hole portion 76. Then, by sliding the guide block 7, the second pin portion 742 can be slid from the large hole portion 76 into the small hole portion 77. The second positioning pin 75 is specifically a rod vertically connected to one end of the positioning portion 73, which moves with the movement of the positioning portion 73. Since the mixing shell 5 and the water inlet shell 4 in this application are detachably connected, and the cut-off portion 47 is disposed on the first side cover 48 of the water inlet shell 4, the guide block 7 can be installed on the mixing shell 5 first, and then the mixing shell 5 and the water inlet shell 4 can be assembled together so that the second positioning pin 75 abuts against the cut-off portion 47 of the water inlet shell 4, thereby restricting the sliding of the second pin portion 742 between the large hole portion 76 and the small hole portion 77, thus achieving positioning. Compared with the structure using locking members for positioning, the method of using the first positioning pin 74 and the second positioning pin 75 can effectively prevent the locking members from falling off, making the overall structure more stable.

[0052] Furthermore, a positioning slot 471 is provided on the cut-off portion 47, and one end of the flow guide block 7 is located in the positioning slot 471, so that the flow guide block 7 is embedded in the cut-off portion 47, making the overall structure more stable. In order to further increase the stability of the installation of the flow guide block 7, the flow guide block 7 also includes a positioning strip 78, which is used to be placed in the positioning slot 471. One side of the positioning strip 78 is provided with the flow guide surface 71. By embedding the positioning strip 78 into the positioning slot 471 and making the flow guide surface 71 completely flat above the constricted boss 44, the flow guiding effect is further enhanced.

[0053] In summary, this application reduces the manufacturing difficulty of the pump head 2 by using a detachable flow guide block 7. Moreover, the separately detached flow guide block 7 can be processed independently and customized into a shape with better noise reduction effect, or its surface can be polished to be smoother to increase the noise reduction effect.

[0054] Example 2: Most of the structure in this embodiment is the same as that in Embodiment 1, except that, as Figure 13 As shown, the water inlet housing 4 has a small volume and is arranged in a strip shape, which is offset on one side of the outer wall of the water outlet housing 6. This can effectively reduce the material used in the water inlet housing 4 and save costs.

[0055] Example 3: like Figure 14 , 15 As shown, most of the structure in this embodiment is the same as in embodiment 2. In embodiment 2, the inlet pipe 41 is entirely located on the outer wall of the outlet shell 6, while in this embodiment, the inlet shell 4 is entirely located inside the outlet shell 6. The inlet pipe 41 is connected to a transition pipe 64 located inside the outlet shell 6 and connected to the inlet shell 4. Combined with... Figure 13 , 14 As shown, in this embodiment, the water inlet housing 4 is small in volume and is set in a strip shape. The depth of the water outlet housing 6 is increased during the stretching process, and the water inlet housing 4 is placed inside the water outlet housing 6 and fixed with fasteners so that the entire water inlet housing 4 is located inside the water outlet housing 6. The water inlet housing 4 and the water outlet housing 6 are connected by an "L"-shaped transition tube 64. Correspondingly, the mixing housing 5 is still fixed on the water inlet housing 4.

[0056] Example 4: like Figure 16As shown, most of the structure in this embodiment is the same as that in Embodiment 1, both featuring a circular inlet housing 4. The difference lies in that the inlet housing 4 is entirely located within the outlet housing 6, and the inlet pipe 41 is entirely embedded within the outlet housing 6, with only the inlet of the inlet housing 4 exposed outside the outlet housing 6. The mixing housing 5 is also fixed to one side of the inlet housing 4. Compared to the previous embodiment, this structure results in a more compact pump head, effectively reducing the overall volume of the pump.

[0057] The above embodiments are merely preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

[0058] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this application and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this application, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms such as "above," "below," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this application. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this application's implementation.

[0059] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0060] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

Claims

1. A water pump, characterized in that, include: A drive motor (1) drives an impeller (12) by rotating the drive motor (1); Pump head (2), the pump head (2) has a low-pressure chamber (21), a mixing chamber (22) and a high-pressure chamber (23) arranged along the axial direction of the drive motor (1); A pressure stabilizing unit (3) is connected to the high-pressure chamber (23) and is used to stabilize the pressure in the high-pressure chamber (23); The pump head (2) includes at least an inlet housing (4), a mixing housing (5), and an outlet housing (6) arranged along the axial direction of the drive motor (1); the inlet housing (4) forms the low-pressure chamber (21), the low-pressure chamber (21) is connected to an inlet pipe (41), and the inlet pipe (41) is provided with an inlet (411); The mixing shell (5) covers the water inlet shell (4), and a mixing cavity (22) is formed between the mixing shell (5) and the water inlet shell (4); a first water outlet (42) is provided between the mixing cavity (22) and the low-pressure cavity (21), and a second water outlet (51) is provided between the mixing cavity (22) and the high-pressure cavity (23). A first spiral flow channel (461) is formed in the mixing cavity (22). The first water outlet (42) and the second water outlet (51) are respectively located at both ends of the first spiral flow channel (461) to allow water to enter the mixing cavity (22) from the first water outlet (42), flow along the first spiral flow channel (461), and then enter the high-pressure cavity (23) from the second water outlet (51). The water outlet housing (6) is located outside the water inlet housing (4); the water outlet housing (6) and the pressure stabilizing unit (3) cooperate to form the high pressure chamber (23); the high pressure chamber (23) is covered outside the mixing housing (5); the high pressure chamber (23) is connected to the water outlet (631), and the impeller (12) is provided in the mixing chamber (22).

2. A water pump according to claim 1, characterized in that: The water inlet housing (4) is fixed to the drive motor (1), and the motor shaft (17) of the drive motor (1) passes through the water inlet housing (4). The side wall of the motor shaft (17) and the water inlet housing (4) are in sliding sealing fit. The mixing shell (5) is provided on the first side cover (48) of the water inlet shell (4); the first side cover (48) is also provided with a constricted boss (44) located in the mixing chamber (22), and the first spiral flow channel (461) is formed outside the constricted boss (44). The water inlet shell (4) and the mixing shell (5) at both ends of the first spiral flow channel (461) are respectively provided with a first water outlet (42) and a second water outlet (51); The motor shaft (17) extends out of the water outlet housing (6) and is located on the constricted boss (44). The impeller (12) located in the mixing chamber (22) is driven by the rotation of the motor shaft (17). The mixing shell (5) has a second spiral flow channel (462) formed on its outside, which is used to allow water to flow along the second spiral flow channel (462) to the outlet (631).

3. A water pump according to claim 1, characterized in that: The mixing chamber (22) is located on the lower side of the middle part of the high-pressure chamber (23); the distance between the mixing shell (5) and the top of the high-pressure chamber (23) is greater than the distance between the mixing shell (5) and the bottom of the high-pressure chamber (23); An eccentric portion (65) is formed between the top of the mixing shell (5) and the high-pressure chamber (23), and an outlet (631) is provided on the eccentric portion (65); the second water outlet (51) is provided on the periphery of the mixing shell (5) and is located in the lower part of the middle of the mixing shell (5).

4. A water pump according to claim 3, characterized in that: The line connecting the outlet (631) and the center of the motor shaft (17) is marked line a, and the line connecting the second water outlet (51) and the center of the motor shaft (17) is marked line b. The angle between marked line a and marked line b is 120~150°.

5. A water pump according to claim 1, characterized in that: The second water outlet (51) is detachably provided with a guide block (7), and the guide block (7) is provided with a guide surface (71) for contacting the water flow.

6. A water pump according to any one of claims 1-5, characterized in that: The pressure stabilizing unit (3) includes an outer tank (31) and an inner tank (32); the inner tank (32) covers the water outlet shell (6) and forms the high-pressure chamber (23); the outer tank (31) covers the outside of the inner tank (32), and an air chamber (33) is formed between the outer tank (31) and the inner tank (32), and a flexible diaphragm (34) is provided in the air chamber (33), which divides the air chamber (33) into two parts; The inner tank (32) is provided with a flow divider (35) located in the high pressure chamber (23), and the flow divider (35) is formed with a plurality of flow divider holes (351) for water vapor separation.

7. A water pump according to claim 6, characterized in that, The water outlet shell (6) and the water inlet shell (4) are either an integral structure or a separate structure; The split structure is as follows: the water outlet shell (6) is an annular cover, and an opening (61) is provided on the water outlet shell (6). The opening (61) is used to be eccentrically fitted on the water inlet shell (4). The opening (61) and the water inlet shell (4) are sealed together. An interface (62) is formed on the periphery of the water outlet shell (6). The water inlet housing (4) is provided with a support boss (43) that abuts against the edge of the opening (61); The drive motor (1) is provided with a fastening seat (13), and the fastening seat (13) is provided with a fastener (131) connected to the water outlet housing (6). The water inlet housing (4) is located between the drive motor (1) and the water outlet housing (6), and is used to position the water inlet housing (4) located between the two by connecting the water outlet housing (6) and the drive motor (1).

8. A water pump according to claim 7, characterized in that: The water outlet shell (6), the mixing shell (5), and the outer tank (31) are all thin stainless steel components.

9. A water pump according to claim 6, characterized in that: The water outlet housing (6) has an interface portion (62) formed on its outer edge. The outer tank (31), inner tank (32) and diaphragm (34) have connecting bosses (36) that abut against the interface portion (62) on their outer edges. The connecting bosses (36) on the outer tank (31), inner tank (32) and diaphragm (34) are stacked on the interface portion in sequence. The water outlet housing (6) and the pressure stabilizing unit (3) are connected by fasteners on the interface portion (62) and the connecting bosses (36).

10. A water pump according to claim 1, characterized in that: The inlet housing (4) is located in the outlet housing (6), and the inlet pipe (41) is provided with a transition pipe (64) located in the outlet housing (6) and connected to the inlet housing (4).

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