Water pump cavity structure and electronic water pump using same

Abstract

The utility model discloses a water pump chamber structure and an electronic water pump using the same, and relates to the technical field of electronic water pumps and parts thereof. A rotor cavity is formed in the inner side of the pump shell; the pump cover covers the pump shell, and an impeller cavity of the pump cover and a rotor cavity of the pump shell are isolated from each other through an isolation plate. The liquid medium can enter the impeller chamber of the pump cover but cannot enter the rotor chamber of the pump housing. The centrifugal water pump mainly solves the problem of how to reduce the liquid suction resistance of the centrifugal water pump. According to the electronic water pump, the liquid suction resistance of the electronic water pump is effectively reduced, the water pump cavity structure can obtain enough negative pressure only by filling the impeller cavity of the pump cover with a liquid medium, so that the normal operation of the electronic water pump is maintained, the electronic water pump can be normally used without filling water or completely pumping air in the rotor cavity, and the service life of the electronic water pump is prolonged. The performance, the stability and the service life of the electronic water pump are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic water pump and its spare part technical field, concretely is a water pump chamber structure and the electronic water pump of application thereof. BACKGROUND

[0002] Electronic water pump has higher output efficiency and can realize accurate flow control, therefore, electronic water pump is widely used in household appliances, automobile and industrial equipment, for example, water heating mattress, air conditioner and humidifying electric appliance and so on household appliances, in order to realize accurate liquid circulation / discharge function, electronic water pump is more and more equipped at present.

[0003] Centrifugal water pump is an important type in electronic water pump, which drives liquid medium to rotate by rotating impeller, and centrifugal phenomenon occurs, thereby driving liquid medium directional flow.

[0004] The centrifugal water pump in prior art lacks self-suction function, when the centrifugal water pump is inverted, air will be left in the water outlet pipe and pump cavity (including impeller chamber and rotor chamber intercommunicating), if the water outlet pipe and pump cavity are not filled with water or the air in the water outlet pipe and pump cavity is not pumped out, the vacuum degree of pump cavity will be insufficient, thereby making the centrifugal water pump difficult to suck water.

[0005] The usual solution to the above problem is to continue to fill water or pump out the air in the pump cavity, however, the above operation needs certain professional training or special equipment, and part of users are difficult to realize.

[0006] In summary, how to reduce the liquid suction resistance of centrifugal water pump becomes one of the problems to be solved. INVENTION CONTENTS

[0007] The utility model discloses a water pump chamber structure and the electronic water pump of application thereof, which can effectively reduce the liquid suction resistance of electronic water pump.

[0008] To achieve the above object, the utility model provides the following technical scheme: a water pump chamber structure, which comprises:

[0009] A pump cover is formed with an impeller chamber on the inner side;

[0010] A pump shell is formed with a rotor chamber on the inner side;

[0011] The pump cover is covered on the pump shell, and the impeller chamber of the pump cover and the rotor chamber of the pump shell are isolated from each other by a partition plate;

[0012] Liquid medium can enter the impeller chamber of the pump cover, but cannot enter the rotor chamber of the pump shell.

[0013] The pump cover and the pump shell are provided with a sealing ring; the pump shell and the isolation plate are provided with a sealing ring; and / or the pump cover and the isolation plate are provided with a sealing ring.

[0014] The pump cover is provided with a water inlet channel and a water outlet channel respectively formed thereon and communicating with both sides of the impeller chamber.

[0015] The electronic water pump comprises the water pump chamber structure.

[0016] The electronic water pump further comprises a rotor-impeller assembly and a stator assembly; the rotor-impeller assembly is sequentially provided with a rotor assembly and an impeller with a transmission connection structure along an axial direction thereof; the rotor assembly of the rotor-impeller assembly is rotatably arranged in the rotor chamber of the pump shell; the impeller of the rotor-impeller assembly is rotatably arranged in the impeller chamber of the pump cover; and the stator assembly is arranged in the pump shell and located outside the rotor chamber of the pump shell, so that the stator assembly can magnetically couple and drive the rotor assembly of the rotor-impeller assembly to rotate.

[0017] The rotor-impeller assembly further comprises a rotating shaft; the rotating shaft of the rotor-impeller assembly penetrates the rotor chamber of the pump shell and the impeller chamber of the pump cover, and can rotate around itself; the rotor assembly of the rotor-impeller assembly is sleeved on the rotating shaft and located in the rotor chamber of the pump shell; and the impeller of the rotor-impeller assembly is sleeved on the rotating shaft and located in the impeller chamber of the pump cover.

[0018] The rotor chamber of the pump shell is embedded with a first bearing; the isolation plate is embedded with a second bearing; and at least one part of the rotating shaft of the rotor-impeller assembly is supported by the first bearing, and at least another part of the rotating shaft is supported by the second bearing.

[0019] The pump cover is provided with a water inlet channel and a water outlet channel respectively formed thereon and communicating with both sides of the impeller chamber; the impeller of the rotor-impeller assembly is sequentially provided with a main driving part and a water inlet driving part along an axial direction thereof; the main driving part of the impeller is located in the impeller chamber of the pump cover; and the water inlet driving part of the impeller penetrates into the water inlet channel of the pump cover.

[0020] The water inlet channel of the pump cover is provided with a water inlet notch.

[0021] The utility model discloses an electronic water pump further includes drive circuit board, drive circuit board sets up in the pump shell, and with stator assembly electric connection.

[0022] Compared with the prior art, the utility model discloses a water pump chamber structure and the electronic water pump of application thereof, under the barrier of the isolation board, liquid medium can only enter the impeller chamber of the pump cover, but can not enter the rotor chamber of the pump shell, therefore, the air in the rotor chamber of the pump shell does not participate in the negative pressure construction process of the water pump chamber structure, effectively reduces the liquid suction resistance of the electronic water pump, that is, liquid medium only needs to fill the impeller chamber of the pump cover, can make the water pump chamber structure obtain enough negative pressure, thereby maintaining the normal operation of the electronic water pump, without filling water or pumping out the air in the rotor chamber, the electronic water pump of the utility model can be normally used, and the performance, stability and service life of the electronic water pump are improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 It is the three-dimensional structure view of the utility model.

[0024] Fig. 2 It is the explosion structure view of the utility model.

[0025] Fig. 3 It is the section structure view of the utility model.

[0026] The figure mark is: 1, pump cover;11, impeller chamber;12, water inlet channel;121, water inlet gap;13, water outlet channel;2, pump shell;21, rotor chamber;22, water outlet pipe;23, first bearing;3, isolation board;31, second bearing;4, sealing ring;5, rotor-impeller assembly;51, rotating shaft;52, rotor assembly;53, impeller;531, main drive part;532, water inlet drive part;6, stator assembly;7, drive circuit board. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, and apparently, the described embodiments only are a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0028] The embodiment provides a water pump chamber structure, which can be applied to a water pump (especially an inverted drainage pump based on a centrifugal electronic water pump) and used as a rotor chamber structure and an impeller chamber structure of the water pump.

[0029] Please refer to Figs. 1-3The water pump chamber structure of the embodiment comprises:

[0030] A pump cover 1, the inner side of which is formed with an impeller chamber 11;

[0031] A pump shell 2, the inner side of which is formed with a rotor chamber 21.

[0032] The pump cover 1 is an integrally formed cover member made of engineering plastic or metal, and the impeller chamber 11 is a cavity in the inner side of the pump cover 1. The pump shell 2 is an integrally formed half-shell member made of engineering plastic, and the rotor chamber 21 is a cavity in the inner side of the pump shell 2.

[0033] The pump cover 1 is combined with the pump shell 2, and it can be understood that the pump cover 1 and the pump shell 2 can be fixed and combined into one by screws or buckles.

[0034] The impeller chamber 11 of the pump cover 1 and the rotor chamber 21 of the pump shell 2 are isolated by a partition plate 3. It should be noted that in the embodiment, the partition plate 3 is an independent plate member made of engineering plastic or metal, which is combined with the opening side of the rotor chamber 21 of the pump shell 2 and is in interference fit or buckle fit with the opening side of the rotor chamber 21 of the pump shell 2, so as to isolate the impeller chamber 11 of the pump cover 1 and the rotor chamber 21 of the pump shell 2 from each other. In other embodiments, the partition plate 3 is a plate structure feature integrally formed on the opening side of the rotor chamber 21 of the pump shell 2.

[0035] Liquid medium can enter the impeller chamber 11 of the pump cover 1, but cannot enter the rotor chamber 21 of the pump shell 2 (under the blocking of the partition plate 3).

[0036] Further, a sealing ring is arranged between the pump cover 1 and the pump shell 2, and / or a sealing ring is arranged between the pump shell 2 and the partition plate 3, and / or a sealing ring is arranged between the pump cover 1 and the partition plate 3. In the embodiment, the water pump chamber structure is provided with one sealing ring 4 (made of rubber or silicone), the upper and lower sides of the sealing ring 4 abut against the pump cover 1 and the pump shell 2 respectively, and the inner side of the sealing ring 4 abuts against the partition plate 3. In this way, the sealing between the pump cover 1, the pump shell 2 and the partition plate 3 is realized simultaneously by the single sealing ring 4.

[0037] Further, the pump cover 1 is formed with a water inlet channel 12 and a water outlet channel 13, which are respectively connected to the inside and outside of the impeller chamber 11. In this embodiment, the water inlet channel 12 is a hard short pipe integrally formed on the pump cover 1, and the water outlet channel 13 is a cavity-shaped flow channel integrally formed in the pump cover 1. The pump shell 2 is integrally formed with a water outlet pipe 22, which is specifically an axial tubular structure feature integrally formed on the outer wall of the pump shell 2. When the pump cover 1 is covered on the pump shell 2, the water outlet channel 13 of the pump cover 1 and the water outlet pipe 22 of the pump shell 2 are in communication with each other, thereby realizing the water inlet and outlet functions of the impeller chamber 11.

[0038] The present embodiment also provides an electronic water pump comprising the water pump chamber structure described above.

[0039] Referring to Figs. 1-3 The electronic water pump of the present embodiment further comprises a rotor-impeller assembly 5 and a stator assembly 6.

[0040] The stator assembly 6 at least comprises a stator support (also referred to as a "stator core") and a coil of enameled wire wound on the stator support, which can generate a rotating magnetic field during operation to drive the rotor-impeller assembly 5 to rotate.

[0041] The rotor-impeller assembly 5 is sequentially arranged in the axial direction as a rotor assembly 52 having a transmission connection structure and an impeller 53.

[0042] The rotor assembly 52 at least comprises a rotor support and a magnetic ring or a plurality of magnetic sheets (whether a magnetic ring or a magnetic sheet, both have permanent magnetism) embedded in the rotor support. After receiving the rotating magnetic field, the rotor assembly 52 can rotate around its own axis, and the rotor support has an axle hole.

[0043] The impeller 53 is an engineering plastic material shaft member with a plurality of radially extending blades, and the impeller 53 has an axle hole.

[0044] The rotor assembly 52 of the rotor-impeller assembly 5 is rotatably arranged in the rotor chamber 21 of the pump shell 2.

[0045] The impeller 53 of the rotor-impeller assembly 5 is rotatably arranged in the impeller chamber 11 of the pump cover 1.

[0046] The stator assembly 6 is arranged in the pump shell 2 and outside the rotor chamber 21 of the pump shell 2, so that the stator assembly 6 can magnetically couple and drive the rotor assembly 52 of the rotor-impeller assembly 5 to rotate. In this embodiment, the stator assembly 6 is sleeved outside the rotor chamber 21 of the pump shell 2, and can be fixed in the pump shell 2 by buckling or screwing.

[0047] Specifically, the rotor-impeller assembly 5 further comprises a rotating shaft 51, wherein the rotating shaft 51 is an axially shaped member made of metal; the rotating shaft 51 of the rotor-impeller assembly 5 penetrates the rotor chamber 21 of the pump shell 2 and the impeller chamber 11 of the pump cover 1, and the rotating shaft 51 of the rotor-impeller assembly 5 can rotate around itself as an axis; the rotor assembly 52 of the rotor-impeller assembly 5 is sleeved on the rotating shaft 51 (both interference fit or key fit), and located in the rotor chamber 21 of the pump shell 2; the impeller 53 of the rotor-impeller assembly 5 is sleeved on the rotating shaft 51 (both interference fit or key fit), and located in the impeller chamber 11 of the pump cover 1.

[0048] Further specifically, the first bearing 23 is embedded in the rotor chamber 21 of the pump shell 2, and the first bearing 23 is one of a ceramic bearing, a graphite bearing or a self-lubricating bushing; the second bearing 31 is embedded in the isolation plate 3, and the second bearing 31 is one of a ceramic bearing, a graphite bearing or a self-lubricating bushing; at least one part of the rotating shaft 51 of the rotor-impeller assembly 5 is supported by the first bearing 23, and at least another part of the rotating shaft 51 is supported by the second bearing 31, and in fact, the rotating shaft 51 of the rotor-impeller assembly 5 directly penetrates the inner ring of the first bearing 23 and the second bearing 31.

[0049] After being configured in the above manner, the rotating shaft 51, the rotor assembly 52 and the impeller 53 constitute a coaxial rotating body assembly, i.e., the rotor-impeller assembly 5.

[0050] Further, in order to improve the self-suction capacity of the electronic water pump, the impeller 53 of the rotor-impeller assembly 5 is configured in sequence along the axial direction as a main driving part 531 and a water inlet driving part 532, specifically, the blades at the main driving part 531 have a longer extension distance along the radial direction, the blades at the water inlet driving part 532 have a shorter extension distance along the radial direction, and the blades at the main driving part 531 and the blades at the water inlet driving part 532 are connected along the axial direction; the main driving part 531 of the impeller 53 is located in the impeller chamber 11 of the pump cover 1; and the water inlet driving part 532 of the impeller 53 penetrates into the water inlet channel 12 of the pump cover 1.

[0051] Further, in order to improve the self-suction capacity of the electronic water pump, the water inlet gap 121 is provided at the water inlet channel 12 of the pump cover 1, and in fact, the water inlet gap 121 is a gap-shaped structure feature integrally formed on the side surface of the water inlet channel 12 of the pump cover 1.

[0052] Further, the electronic water pump of the embodiment further comprises a driving circuit board 7, which is a printed circuit board (PCB) carrying a main control, power electronic devices for driving the stator assembly 6 to operate and necessary peripheral circuits for driving the stator assembly 6 to operate; the driving circuit board 7 is arranged in the pump shell 2 and electrically connected with the stator assembly 6. In fact, the driving circuit board 7 can be fixed in the pump shell 2 by snap fastening or screwing. In some possible embodiments, the end of the enameled wire coil of the stator assembly 6 is provided with a terminal which is welded on the driving circuit board 7 to realize the electrical connection between the stator assembly 6 and the driving circuit board 7.

[0053] In use, the electronic water pump of the embodiment uses an external power supply to access the driving circuit board 7, and the driving circuit board 7 supplies power to the enameled wire coil of the stator assembly 6. After the enameled wire coil is powered, an alternating magnetic field is generated, which can generate a rotating magnetic field in the rotor chamber 21 through the guidance of the stator support (stator core). The rotating magnetic field is located in the rotor chamber 21 in space. The rotor assembly 52 (specifically, the magnetic ring / magnetic sheet thereof) in the rotor chamber 21 is magnetically coupled with the rotating magnetic field, so that the entire rotor-impeller assembly 5 starts to rotate. When the impeller 53 located in the impeller chamber 11 rotates, it can generate a directional pressure difference in the impeller chamber 11, thereby driving the liquid medium to be sucked into the impeller chamber 11 from the water inlet channel 12 and discharged along the water outlet channel 13 and the water outlet pipe 22 of the pump shell 2, so as to complete the basic function of the water pump.

[0054] In the above process, the main driving part 531 and the water inlet driving part 532 of the impeller 53 are both rotating. The rotating water inlet driving part 532 can suck the liquid medium at the water inlet channel 12 into the impeller chamber 11, and then form a stable water flow under the driving of the main driving part 531. Even if the liquid surface is shallow, as long as the liquid surface can contact the water inlet driving part 532, the water pump can operate normally without completing the initial water supply. The water inlet channel 12 of the pump cover 1 is provided with a water inlet gap 121, which is beneficial to the liquid medium entering the water inlet channel 12 and contacting the water inlet driving part 532 of the impeller 53. Therefore, the water inlet gap 121 of the pump cover 1 and the water inlet driving part 532 of the impeller 53 have a cooperation function.

[0055] Please refer to Fig. 3In the above process, under the blocking of the isolation plate 3, the liquid medium can only enter the impeller chamber 11 of the pump cover 1, but cannot enter the rotor chamber 21 of the pump shell 2, therefore, the air in the rotor chamber 21 of the pump shell 2 does not participate in the process of constructing negative pressure of the water pump chamber structure, effectively reducing the liquid suction resistance of the electronic water pump, that is, the liquid medium only needs to fill the impeller chamber 11 of the pump cover 1, so that the water pump chamber structure can obtain sufficient negative pressure, thereby maintaining the normal operation of the electronic water pump, without the need of water filling or completely pumping out the air in the rotor chamber 21, so that the electronic water pump of the embodiment can be normally used, and the performance, stability and service life of the electronic water pump are improved.

[0056] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A water pump chamber structure characterized by, The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber.

2. The water pump chamber structure according to claim 1, characterized by The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber.

3. The water pump chamber structure according to claim 1 or 2, characterized by The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber.

4. An electronic water pump characterized by comprising: The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber.

5. The electronic water pump of claim 4, wherein, The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber.

6. The electronic water pump of claim 5, wherein, The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber.

7. The electronic water pump of claim 6, wherein The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber.

8. The electronic water pump according to any of claims 5 to 7, characterized in that The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber.

9. The electronic water pump of claim 8, wherein, The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber.

10. The electronic water pump according to any one of claims 5 to 7, characterized in that The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. The pump cover is provided with a water inlet channel and a water outlet channel respectively, which are connected to the inside and outside of the impeller chamber. 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