Water pump and water purifier comprising same

Abstract

The utility model provides a water pump and a water purifier comprising the same. The water pump comprises a pump head assembly and a first impeller, a water outlet is formed in one end of the pump head assembly in the axis direction of the first impeller, and a first pump cavity and the first impeller are arranged at the end, relatively away from the water outlet, in the pump head assembly. A conical second pump cavity is formed in one end, close to the water outlet, in the pump head assembly, the first pump cavity is communicated with the larger end of the second pump cavity, and the water outlet is communicated with the smaller end of the second pump cavity; the water pump further comprises a second impeller which is located in the second pump cavity and corresponds to the second pump cavity in shape. When the water pump is started, air in the first pump cavity is rapidly extruded out through the first impeller, meanwhile, thrust in the axial direction of the second impeller and in the direction from the large end of the second pump cavity to the small end of the second pump cavity can be provided when the second impeller rotates, and water in the first pump cavity is extruded out of the water outlet through the second pump cavity. The water purifier can still work normally in an area under the low-pressure or zero-pressure condition.

Description

TECHNICAL FIELD

[0001] The utility model relates to water purification equipment technical field, especially a kind of water pump and water purifier comprising it. BACKGROUND

[0002] In prior art, water pump (usually diaphragm pump can be used) is provided in water purifier, and water pump is used to suck water into water purifier and push water flow through various filtering and processing units, to ensure that water can be fully contacted and passed through filter core, activated carbon and other purification materials, so as to effectively remove impurities, harmful substances and microorganisms in water, and finally provide clean and safe drinking water. To achieve the purpose of pushing water flow to flow between various filtering and processing units in water purifier, water pump includes pump head assembly and impeller, the inner cavity shape of pump head assembly is bowl-shaped structure, including larger bowl mouth and smaller bowl bottom, larger bowl mouth and water pump main body (including motor and water pump shell and other structures) are sealingly connected, water inlet is provided on the side wall of pump head assembly, water outlet is provided at bowl bottom, pump cavity is provided in pump head assembly, impeller is located inside pump cavity, and the rotation axis direction of impeller corresponds to the setting of water outlet. Through the rotation of impeller and the cooperation of bowl-shaped inner cavity structure, the purpose of sucking water from water inlet and pumping water out from water outlet is achieved.

[0003] However, in some rural areas with small water pressure or zero water pressure areas, the self-suction capacity of water purifier with the above structure is weak, and the pre-membrane pressure when the reverse osmosis water purifier produces water cannot be provided, which further leads to low water outlet pressure and slow water outlet speed, and cannot meet normal use. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem that the self-suction capacity of water pump in prior art water purifier is weak, and provides a water pump and a water purifier comprising the same.

[0005] The utility model solves the above technical problem by the following technical scheme:

[0006] A water pump comprises a pump head assembly and a first impeller, and along the axis direction of the first impeller, one end of the pump head assembly is provided with a water outlet, and the end of the pump head assembly opposite to the water outlet is provided with a first pump cavity, and the first impeller is located in the first pump cavity.

[0007] One end of the pump head assembly close to the water outlet is provided with a conical second pump cavity, the larger end of the first pump cavity and the second pump cavity is connected, and the water outlet and the smaller end of the second pump cavity are connected.

[0008] The water pump further comprises a second impeller, and the second impeller is located in the second pump cavity and is arranged in a shape corresponding to the second pump cavity.

[0009] In the technical solution, the air in the first pump cavity is quickly extruded out when the first impeller rotates at the start, so that a negative pressure is formed in the first pump cavity to suck water into the first pump cavity; meanwhile, the second impeller rotates, and since the shape of the second impeller corresponds to the conical second pump cavity, the second impeller can provide a thrust along the axial direction of the second impeller in the direction from the larger end of the second pump cavity to the smaller end of the second pump cavity when rotating, so as to extrude the water in the first pump cavity out of the water outlet through the second pump cavity; that is, by sequentially arranging the two impellers along the flow direction of the water, the first impeller and the second impeller jointly provide a larger water outlet pressure to the water flow, thereby improving the self-suction capacity of the water pump, and even under the condition of a smaller water flow pressure or even zero pressure, the water pump can still continuously output stable water flow.

[0010] Preferably, the second impeller comprises a second shaft core and a plurality of second blades distributed on the periphery of the second shaft core.

[0011] The second blade has a second blade head portion close to the first impeller and a second blade tail portion close to the water outlet, the second blade head portion and the second blade tail portion are arcuately connected, and the radial dimension of the second blade head portion is greater than the radial dimension of the second blade tail portion.

[0012] In the technical solution, by setting the radial dimension of the second blade head portion to be greater than the radial dimension of the second blade tail portion, the blade edge shape of each second blade can be matched with the inner wall surface shape of the second pump cavity, and a thrust along the axial direction of the second impeller in the direction from the larger end of the second pump cavity to the smaller end of the second pump cavity can be provided when the second impeller rotates with a relatively simple structure; by setting the second blade head portion and the second blade tail portion to be arcuately connected, a smooth shape transition can be realized in the middle portion of the second blade, the water flow resistance is reduced, the water flow in the second pump cavity is guided, and the water outlet pressure of the water pump is further improved.

[0013] Preferably, the water pump further comprises a shaft body, and the first impeller and the second impeller are coaxially connected through the shaft body.

[0014] In the technical solution, by the above arrangement, power transmission and cooperative operation between the first impeller and the second impeller are realized with a relatively simple structure, the turbulence problem caused by the difference in direction and speed between the first impeller and the second impeller is avoided, and the stability of the water flow is improved.

[0015] Preferably, the shaft body comprises a first protrusion, the inner side of the first shaft core of the first impeller is provided with a first groove, the first protrusion and the first groove are matched, and the first protrusion is embedded in the first groove; and / or,

[0016] The shaft body further comprises a second groove, the inner side of the second shaft core of the second impeller is provided with a second protrusion, the second protrusion and the second groove are matched, and the second protrusion is embedded in the second groove; and / or,

[0017] The end of the shaft body close to the water outlet further comprises a limiting part, the diameter of the limiting part is greater than the inner diameter of the second shaft core of the second impeller.

[0018] In the technical solution, the matching of the first protrusion and the first groove is set, so that the stable connection of the first impeller and the shaft body is realized in a relatively simple structure, and the stability of the water pump in operation is improved.

[0019] The matching of the second protrusion and the second groove is set, so that the stable connection of the second impeller and the shaft body is realized in a relatively simple structure, and the stability of the water pump in operation is improved.

[0020] The limiting part is set on the shaft body, so that the position of the second impeller is further fixed, the problem that the second impeller is impacted against the water outlet due to sliding on the shaft body during the operation of the water pump is avoided, and the stability of the water pump in operation is improved.

[0021] Preferably, the ratio of the diameter of the first impeller to the maximum diameter of the second impeller is 1.5:1 to 2.5:1.

[0022] In the technical solution, through the above setting, the negative pressure provided by the first impeller and the thrust provided by the second impeller can be matched, and the performance of the water pump is optimized.

[0023] Preferably, the shaft body comprises a first shaft segment and a second shaft segment, the first shaft segment is fixedly penetrated through the first shaft core of the first impeller, the first shaft segment has an internal thread, the second shaft segment has an external thread, and the first shaft segment and the second shaft segment are threadedly connected.

[0024] In the technical solution, through the above setting, the first impeller or the second impeller can be conveniently disassembled, replaced, assembled and maintained.

[0025] Preferably, the pump head assembly comprises a pump head shell and a reinforcing rib, a plurality of reinforcing ribs are uniformly distributed on the outer circumferential side of the pump head shell in the axial direction, one end of the reinforcing rib is connected to the pump head shell, and the other end of the reinforcing rib is connected to each other.

[0026] In the technical solution, through the above setting, uniform locking force can be provided at the pump head shell, the structural strength of the pump head shell is enhanced, the deformation or damage of the pump head shell under high water pressure is avoided, and the durability and reliability of the water pump are improved.

[0027] Preferably, the periphery of the pump head shell is provided with a fixing screw rod, and the ends of the reinforcing ribs connected to each other are sleeved on the outer periphery of the fixing screw rod.

[0028] In the technical solution, the structural strength of the pump head shell is further enhanced, the deformation or damage of the pump head shell under high water pressure is avoided, and the durability and reliability of the water pump are improved.

[0029] Preferably, the periphery of the water outlet is provided with a boss, the smaller end of the boss is away from the pump head assembly, and the larger end of the boss is close to the pump head assembly.

[0030] In the technical solution, the boss is arranged to facilitate the fixation of the water outlet and the external pipeline, and facilitate the installation of the water pump.

[0031] A water purifier comprises the water pump.

[0032] In the technical solution, the water pump can achieve zero-pressure water self-suction, and can also stably output zero-pressure water at a certain pressure to provide the pre-membrane pressure when the water purifier generates water, so that the water purifier can be adapted to areas where the water flow is under low pressure or zero pressure, and the user experience is optimized.

[0033] The positive progress effect of the utility model lies in:

[0034] The water pump is provided, and when the first impeller rotates, the air in the first pump cavity is quickly extruded, so that negative pressure is formed in the first pump cavity, water is sucked into the first pump cavity, and the second impeller rotates. Since the shape of the second impeller corresponds to the conical second pump cavity, the second impeller can provide thrust along the axial direction of the second impeller in the direction from the larger end of the second pump cavity to the smaller end of the second pump cavity when rotating, so that the water in the first pump cavity is extruded from the water outlet through the second pump cavity. That is, the first impeller and the second impeller jointly provide a large water outlet pressure to the water flow, thereby improving the self-suction capacity of the water pump. Even under the condition of low water flow pressure or zero pressure, the water pump can still continuously output stable water flow. The water purifier is provided, and the water pump can achieve zero-pressure water self-suction and can also stably output zero-pressure water at a certain pressure to provide the pre-membrane pressure when the water purifier generates water, so that the water purifier can be adapted to areas where the water flow is under low pressure or zero pressure, and the user experience is optimized. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a three-dimensional structure schematic view of the water pump of an embodiment of the utility model.

[0036] Figure 2 It is a sectional structure schematic view of the water pump of an embodiment of the utility model.

[0037] Figure 3The installation schematic view of the second impeller and the second shaft end of the embodiment of the utility model.

[0038] Figure 4 The cooperation schematic view of the pump head shell, the reinforcing rib and the fixed screw rod of the embodiment of the utility model.

[0039] BRIEF DESCRIPTION OF DRAWINGS

[0040] The first impeller 1

[0041] The second impeller 2

[0042] The second blade 21

[0043] The second blade head 211

[0044] The second blade tail 212

[0045] The second shaft core 22

[0046] The second protrusion 221

[0047] The pump head assembly 3

[0048] The first pump cavity 31

[0049] The second pump cavity 32

[0050] The water outlet 33

[0051] The pump head shell 34

[0052] The sealing groove 341

[0053] The reinforcing rib 351

[0054] The fixed screw rod 352

[0055] The pump cavity shell 36

[0056] The boss 38

[0057] The water inlet 37

[0058] The shaft body 4

[0059] The first shaft section 41

[0060] The second shaft section 42

[0061] The limiting portion 43

[0062] The second groove 45

[0063] The pump assembly 5 DETAILED DESCRIPTION

[0064] The utility model will be explained more clearly and completely in combination with the drawings by taking a preferred embodiment.

[0065] AsFigures 1-4 As shown, the embodiment provides a water pump, which comprises a pump head assembly 3 and a first impeller 1, and one end of the pump head assembly 3 is provided with a water outlet 33 along the axial direction of the first impeller 1 (in this embodiment, the axial direction of the first impeller 1 and the second impeller 2 is A direction), and the other end of the pump head assembly 3 inside is provided with a first pump cavity 31, and the first impeller 1 is located in the first pump cavity 31.

[0066] The other end of the pump head assembly 3 inside is provided with a conical second pump cavity 32, the larger end of the first pump cavity 31 and the second pump cavity 32 is connected, and the water outlet 33 and the smaller end of the second pump cavity 32 are connected.

[0067] The water pump further comprises a second impeller 2, which is located in the second pump cavity 32 and is correspondingly arranged in shape with the second pump cavity 32; that is, the larger end of the second impeller 2 is close to the first impeller 1, and the smaller end of the second impeller 2 is close to the water outlet 33.

[0068] When the water pump starts, the first impeller 1 rotates to quickly extrude the air in the first pump cavity 31, so that a negative pressure is formed in the first pump cavity 31 to suck water into the first pump cavity 31; at the same time, the second impeller 2 rotates, and because the shape of the second impeller 2 corresponds to the conical second pump cavity 32, the second impeller 2 can provide a thrust along the axial direction of the second impeller 2 from the larger end of the second pump cavity 32 to the smaller end of the second pump cavity 32 during rotation, so as to extrude the water in the first pump cavity 31 from the water outlet 33 through the second pump cavity 32; that is, the first impeller 1 and the second impeller 2 jointly provide a larger water outlet pressure to the water flow, thereby improving the self-suction capacity of the water pump, and even under the condition of small or even zero water flow pressure, the water pump can still continuously output stable water flow.

[0069] In this embodiment, the second impeller 2 comprises a second impeller 21 and a second shaft core 22, and a plurality of second blades 21 are distributed on the circumferential side of the second shaft core 22.

[0070] The second blade 21 has a second blade head 211 close to the first impeller 1 and a second blade tail 212 close to the water outlet 33, the second blade head 211 and the second blade tail 212 are arc-shapedly connected, and the radial dimension of the second blade head 211 is greater than that of the second blade tail 212, so that the blade edge shape of each second blade 21 matches the inner wall surface shape of the second pump cavity 32, and a relatively simple structure is provided to provide a thrust along the axial direction of the second impeller 2 from the larger end of the second pump cavity 32 to the smaller end of the second pump cavity 32 during rotation of the second impeller 2; by arc-shapedly connecting the second blade head 211 and the second blade tail 212, a smooth shape transition can be realized in the middle of the second blade 21, the water flow resistance is reduced, the water flow in the second pump cavity 32 is guided, and the water outlet pressure of the water pump is further improved.

[0071] In the embodiment, the water pump further comprises a shaft body 4, the first impeller 1 and the second impeller 2 are coaxially connected through the shaft body 4, so that the power transmission and cooperative operation between the first impeller 1 and the second impeller 2 are realized in a relatively simple structure, the turbulence problem caused by the difference in direction and speed between the first impeller 1 and the second impeller 2 is avoided, and the stability of water flow is improved.

[0072] In the embodiment, the shaft body 4 further comprises a second groove 45, the inner side of the second shaft core 22 of the second impeller 2 is provided with a second protrusion 221, the second protrusion 221 is matched with the second groove 45, and the second protrusion 221 is embedded in the second groove 45, so that the stable connection between the second impeller 2 and the shaft body 4 is realized in a relatively simple structure, and the stability of the water pump in operation is improved.

[0073] In the embodiment, one end of the shaft body 4 close to the water outlet 33 further comprises a limiting portion 43, the diameter of the limiting portion 43 is greater than the inner diameter of the second shaft core 22 of the second impeller 2, the limiting portion 43 can further fix the position of the second impeller 2, the problem that the second impeller 2 slides on the shaft body 4 to cause impact on the water outlet 33 during the operation of the water pump is avoided, and the stability of the water pump in operation is improved.

[0074] In the embodiment, the ratio of the diameter of the first impeller 1 to the maximum diameter of the second impeller 2 is 2:1, so that the negative pressure provided by the first impeller 1 and the thrust provided by the second impeller 2 can be matched, and the performance of the water pump is optimized. Of course, in other embodiments, the ratio of the diameter of the first impeller 1 to the maximum diameter of the second impeller 2 can also take other values in the range of 1.5:1~2.5:1.

[0075] In the embodiment, the shaft body 4 comprises a first shaft section 41 and a second shaft section 42, the first shaft section 41 is fixedly penetrated through the first shaft core 12 of the first impeller 1, the first shaft section 41 has an internal thread, the second shaft section 42 has an external thread, and the first shaft section 41 and the second shaft section 42 are threadedly connected, so that the first impeller 1 or the second impeller 2 can be conveniently separately disassembled, replaced, assembled and maintained.

[0076] In the embodiment, the pump head assembly 3 comprises a pump head shell 34 and a plurality of reinforcing ribs 351, the reinforcing ribs 351 are uniformly distributed on the outer circumferential side of the pump head shell 34 in the axial direction, one end of the reinforcing rib 351 is connected to the pump head shell 34, and the other end of the reinforcing rib 351 is connected to each other. In this way, uniform locking force can be provided at the pump head shell 34, the structural strength of the pump head shell 34 is enhanced, the deformation or damage of the pump head shell 34 under high water pressure is avoided, and the durability and reliability of the water pump are improved.

[0077] In the embodiment, the pump head shell 34 is provided with a fixing screw rod 352 on the peripheral side, and one end of the reinforcing rib 351 connected to each other is sleeved on the outer peripheral side of the fixing screw rod 352, so as to further enhance the structural strength of the pump head shell 34, avoid the deformation or damage of the pump head shell 34 under high water pressure, and improve the durability and reliability of the water pump.

[0078] In the embodiment, the part of the pump head shell 34 close to the pump cavity shell 36 (the water inlet 37 is arranged on the side wall thereof) and the pump assembly 5 (the necessary structure of the water pump such as a motor is arranged in the pump assembly 5) of the water pump is provided with a sealing groove 341, and a sealing ring (not shown in the figure) is arranged in the sealing groove 341, so as to ensure that the water flow in the pump head shell 34 does not leak out after the pump head shell 34 and the pump cavity shell 36 are assembled, and the sealing performance and pressure stability of the water pump during operation are improved.

[0079] In the embodiment, the outer peripheral side of the water outlet 33 is provided with a boss 38, the smaller end of the boss 38 is away from the pump head assembly 3, and the larger end of the boss 38 is close to the pump head assembly 3, so that the water outlet 33 and the external pipeline can be fixed, and the installation of the water pump is facilitated.

[0080] The embodiment also provides a water purifier comprising the water pump. Since the water pump can realize zero-pressure water self-suction and can also stably output zero-pressure water at a certain pressure, the membrane pre-pressure when the water purifier provides water is provided, so that the water purifier can be adapted to an area where the water flow is under low pressure or zero pressure, and the user experience is optimized.

[0081] Although the specific embodiments of the utility model are described above, those skilled in the art should understand that this is only an example, the protection scope of the utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the utility model, and these changes and modifications all fall within the protection scope of the utility model.

Claims

1. A water pump comprising a pump head assembly and a first impeller, an outlet of the pump head assembly being provided at one end of the pump head assembly along an axial direction of the first impeller, a first pump cavity being provided in the pump head assembly at an opposite end of the pump head assembly away from the outlet, and the first impeller being located in the first pump cavity; characterized in that: a tapered second pump cavity is provided in the pump head assembly at an end of the pump head assembly close to the outlet, a larger end of the first pump cavity and a larger end of the second pump cavity being in communication, and the outlet and a smaller end of the second pump cavity being in communication; the water pump further comprises a second impeller, the second impeller being located in the second pump cavity and being shaped to correspond to the second pump cavity. The second impeller comprises a second shaft core and a plurality of second blades distributed around the second shaft core. The second blade has a second blade head close to the first impeller and a second blade tail close to the outlet, the second blade head and the second blade tail are arcuately connected, and a radial dimension of the second blade head is greater than a radial dimension of the second blade tail.

2. The water pump of claim 1, wherein The water pump further comprises a shaft body, the first impeller and the second impeller are coaxially connected through the shaft body. The shaft body comprises a first protrusion, an inner side of a first shaft core of the first impeller is provided with a first groove, the first protrusion and the first groove are matched, and the first protrusion is embedded in the first groove; and / or, 3. The water pump of claim 1, wherein The shaft body further comprises a second groove, an inner side of a second shaft core of the second impeller is provided with a second protrusion, the second protrusion and the second groove are matched, and the second protrusion is embedded in the second groove; and / or, 4. The water pump of claim 3, wherein An end of the shaft body close to the outlet further comprises a limiting portion, a diameter of the limiting portion is greater than an inner diameter of the second shaft core of the second impeller. A ratio of a maximum diameter of the first impeller to a maximum diameter of the second impeller is 1.5:1-2.5:

1. The shaft body comprises a first shaft segment and a second shaft segment, the first shaft segment is fixedly provided through the first shaft core of the first impeller, the first shaft segment has an internal thread, the second shaft segment has an external thread, and the first shaft segment and the second shaft segment are threadedly connected.

5. The water pump of claim 3, wherein The pump head assembly comprises a pump head shell and a plurality of reinforcing ribs, the reinforcing ribs are uniformly distributed on an outer circumferential side of the pump head shell in an axial direction, one end of the reinforcing ribs is connected to the pump head shell, and the other end of the reinforcing ribs is connected to each other.

6. The water pump of claim 3 wherein, A fixing screw is provided on the circumferential side of the pump head shell, and the other end of the reinforcing ribs connected to each other is sleeved on an outer circumferential side of the fixing screw.

7. The water pump of claim 1, wherein An outer circumferential side of the outlet is provided with a boss, a smaller end of the boss is away from the pump head assembly, and a larger end of the boss is close to the pump head assembly.

8. The water pump of claim 7, wherein The water pump comprises the water pump according to any one of claims 1-9.

9. The water pump of any one of claims 1-8, wherein, ​ 10. A water purifier characterized by comprising: ​

Images