Vertical centrifugal pump and air conditioner having same

Abstract

A vertical centrifugal pump and an air conditioner having same. The vertical centrifugal pump comprises: a pump body, a pump cover and an impeller. The pump body comprises a pump housing and a drive shaft extending downward from the lower end of the pump housing. The pump cover is arranged at the bottom of the pump body, and a cavity is formed between the pump cover and the pump housing. A water inlet and a water outlet that are in communication with the cavity are formed on the pump cover, the water inlet is located at the lower end of the pump cover, and the water outlet is located at the side portion of the pump cover and is higher than the water inlet. The impeller is arranged in the cavity and is connected to the drive shaft extending into the cavity. A vent hole is also provided on the pump cover, and the vent hole is in communication with the cavity and is higher than the water inlet.

Description

Vertical centrifugal pump and air conditioner with same

[0001] Cross-reference to related applications

[0002] The present application is based on and claims priority to Chinese Patent Application No. 202422209045.1, filed on September 9, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the field of air conditioning equipment, in particular to a vertical centrifugal pump and an air conditioner with the same. BACKGROUND

[0004] Centrifugal pumps are often used when air conditioners use and remove condensate water. Due to the miniaturization design trend of household appliances, the centrifugal pumps used in air conditioners are vertically installed inside the whole machine.

[0005] In related technologies, the vertical centrifugal pump has an exhaust problem of the internal cavity. When the internal cavity contains air, liquid cannot enter the internal cavity, causing the vertical centrifugal pump to stall and unable to smoothly realize the water pumping function.

[0006] SUMMARY

[0007] The present application aims to at least partially solve one of the technical problems in the related art. To this end, the present application proposes a vertical centrifugal pump and an air conditioner with the same, which can solve the problem of air in the cavity causing the vertical centrifugal pump to idle and improve the working reliability.

[0008] Another object of the present application is to propose an air conditioner with the above-mentioned vertical centrifugal pump.

[0009] According to the vertical centrifugal pump of the first aspect of the present application, the pump body includes a pump shell and a drive shaft, the drive shaft extends downward from the lower end of the pump shell; a pump cover is arranged at the bottom of the pump body and forms a cavity with the pump shell, a water inlet and a drain outlet are formed on the pump cover and communicate with the cavity, the water inlet is located at the lower end of the pump cover, and the drain outlet is located at the side of the pump cover and is higher than the water inlet; an impeller is arranged in the cavity and connected with the drive shaft extending into the cavity; wherein an exhaust hole is further formed on the pump cover, the exhaust hole communicates with the cavity and is higher than the water inlet.

[0010] According to the vertical centrifugal pump, air in the cavity can be discharged from the exhaust hole, liquid at the bottom of the vertical centrifugal pump can smoothly enter the cavity, and is discharged from the drain port under the driving of the impeller, so that the problem of idle rotation of the vertical centrifugal pump caused by air in the cavity is solved, and the damage of the impeller or the driving shaft caused by long-time idle rotation of the impeller and failure of heat dissipation of the impeller by contacting liquid is improved, thereby improving the working reliability of the vertical centrifugal pump.

[0011] The exhaust hole is lower than the upper end of the drain port, and / or the aperture of the exhaust hole is smaller than the flow area of the drain port.

[0012] The pump cover comprises a water inlet section and a volute section, the water inlet section is connected to the bottom of the volute, the water inlet port is formed at the lower end of the water inlet section, the side of the volute section extends to a diffusion section, the outlet end of the diffusion section is formed as the drain port, and the exhaust hole is formed on the volute section or the upper end of the water inlet section.

[0013] The exhaust hole is formed on the side of the volute section and is located on the side of the volute tongue of the diffusion section.

[0014] The central angle between the exhaust hole and the diffusion section is less than 90°.

[0015] The exhaust hole is multiple and is arranged at intervals along the circumference of the volute section.

[0016] The exhaust hole is located at the lower part of the side of the volute section.

[0017] The water inlet section is formed as a cylinder, the diameter of the water inlet section is smaller than the diameter of the volute section, the impeller comprises a first impeller and a second impeller, the first impeller is connected above the second impeller and is located in the volute section, at least part of the second impeller is arranged in the water inlet section, and the diameter of the first impeller is larger than the diameter of the second impeller.

[0018] The pump cover comprises a water inlet section and a volute section, the water inlet section is connected to the bottom of the volute section, the impeller comprises a first impeller and a second impeller, the first impeller is connected above the second impeller and is located in the volute section, at least part of the second impeller is arranged in the water inlet section, and the diameter of the first impeller is larger than the diameter of the second impeller.

[0019] The second impeller comprises multiple second blades arranged at intervals along the circumference of the driving shaft, and the second blades are formed as inclined blades inclined to the vertical direction from bottom to top.

[0020] The upper end of the second blade extends into the volute section.

[0021] The first impeller comprises a plurality of first blades arranged along a circumference of the drive shaft, and the second impeller comprises a plurality of second blades arranged along the circumference of the drive shaft, wherein a height of the first blades in a vertical direction is less than a height of the second blades in the vertical direction.

[0022] The water inlet section is formed in a cylindrical shape, and a diameter of the water inlet section is less than a diameter of the volute section, the water inlet is formed at a lower end of the water inlet section, and the water outlet is arranged at a side of the volute section.

[0023] The air conditioner according to the second aspect of the present application comprises a condensate water treatment system, the condensate water treatment system comprising a water pan, a water drainage pipeline, and the vertical centrifugal pump according to the first aspect of the present application, the vertical centrifugal pump being vertically arranged on the water pan, the water inlet being located at a lower end of the vertical centrifugal pump and in a water storage cavity of the water pan, and the water outlet being connected with a water inlet end of the water drainage pipeline.

[0024] The air conditioner according to the embodiment of the present application, by arranging the vertical centrifugal pump according to the first aspect of the present application, can reduce the space occupation of the water pan compared with arranging a horizontal centrifugal pump, thereby reducing the arrangement difficulty of the condensate water treatment system and being beneficial to increasing the water storage capacity of the water pan. Furthermore, by arranging the vertical centrifugal pump according to the first aspect of the present application, the internal cavity exhaust problem of the vertical centrifugal pump can be solved, the water pumping operation function can be smoothly realized, the working reliability of the condensate water treatment system can be improved, and the use effect of the air conditioner can be improved.

[0025] The air conditioner is a window air conditioner, and the condensate water treatment system further comprises a spray head, and a water outlet end of the water drainage pipeline is connected with the spray head.

[0026] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0027] FIG. 1 is a structural schematic diagram of a vertical centrifugal pump according to an embodiment of the present application;

[0028] FIG. 2 is an exploded structural diagram of a vertical centrifugal pump according to an embodiment of the present application;

[0029] FIG. 3 is another exploded structural diagram of a vertical centrifugal pump according to an embodiment of the present application;

[0030] FIG. 4 is a structural schematic diagram of a pump cover according to an embodiment of the present application;

[0031] FIG. 5 is a structural schematic diagram of the pump cover from another angle according to an embodiment of the present application;

[0032] FIG. 6 is a sectional view of a vertical centrifugal pump according to an embodiment of the present application;

[0033] FIG. 7 is a side view of a pump cover according to an embodiment of the present application;

[0034] FIG. 8 is an A-A sectional view according to the example shown in FIG. 7;

[0035] FIG. 9 is a structural schematic view of an impeller according to an embodiment of the present application;

[0036] FIG. 10 is a structural schematic view of the impeller according to another angle of an embodiment of the present application;

[0037] FIG. 11 is a partial enlarged view of a B region according to the example shown in FIG. 6;

[0038] FIG. 12 is a partial structural schematic view of an air conditioner according to an embodiment of the present application.

[0039] Reference numerals: vertical centrifugal pump 100; pump body 1; pump shell 11; driving shaft 12; pump cover 2; cavity 2a; water inlet section 2b; volute section 2c; diffuser section 2c1; water inlet 21; water outlet 22; air vent 23; impeller 3; first impeller 31; first blade 311; second impeller 32; second blade 321; impeller hole 33; threaded fixing member 4; water pan 200; water holding cavity 201; base 300. DETAILED DESCRIPTION

[0040] Embodiments of the present application are described in detail below with reference to the attached drawings, which show examples of embodiments of the present application. The same or similar components have the same or similar reference numbers throughout the drawings and the detailed description. The embodiments described below are examples intended to explain the present application, and should not be understood as limiting the present application.

[0041] A vertical centrifugal pump 100 according to an embodiment of the first aspect of the present application is described below with reference to the drawings.

[0042] According to the vertical centrifugal pump 100 of the embodiment of the present application, as shown in FIGS. 1-3, the vertical centrifugal pump 100 comprises a pump body 1, a pump cover 2 and an impeller 3, the pump body 1 comprises a pump shell 11 and a driving shaft 12 extending downward from the lower end of the pump shell 11; the pump cover 2 is arranged at the bottom of the pump body 1 and forms a cavity 2a with the pump shell 11, the pump cover 2 is formed with a water inlet 21 and a water outlet 22 communicating with the cavity 2a, the water inlet 21 is located at the lower end of the pump cover 2, and the water outlet 22 is located at the side of the pump cover 2 and is higher than the water inlet 21; the impeller 3 is arranged in the cavity 2a and connected with the driving shaft 12 extending into the cavity 2a; wherein the pump cover 2 is further formed with an exhaust hole 23 communicating with the cavity 2a and higher than the water inlet 21. Wherein, vertical means that the driving shaft 12 extends in the up-down direction, which can be absolutely vertical or slightly inclined to the vertical direction.

[0043] The pump body 1 and the pump cover 2 are main parts of the vertical centrifugal pump 100, which protect the internal components, the driving shaft 12 extends downward from the lower end of the pump shell 11 into the cavity 2a of the pump cover 2 at the lower end of the pump body 1, the driving shaft 12 is connected with the impeller 3 in the cavity 2a, and the driving shaft 12 is connected with a power component to drive the impeller 3 to rotate.

[0044] The vertical centrifugal pump 100 is vertically arranged, which is used to pump the liquid at the bottom from the water inlet 21 into the cavity 2a and finally discharge from the water outlet 22. When the impeller 3 rotates, the liquid is pumped into the cavity 2a through the water inlet 21 by the centrifugal force generated by the rotation of the impeller 3, and then the liquid in the cavity 2a is discharged through the water outlet 22 at the side of the pump cover 2 by the water pressure generated by the rotation of the impeller 3 in the cavity 2a. Exemplarily, the water outlet 22 is connected with a water discharge pipeline, so that the liquid can be discharged from the bottom of the vertical centrifugal pump 100 to other positions.

[0045] However, in the related art, when the vertical centrifugal pump stops running, the water level at the bottom of the vertical centrifugal pump is not high or for other reasons, which can cause air to enter the cavity from the water inlet, and at the same time, due to the water in the pipeline connected at the water outlet or other reasons, a liquid seal or other form of seal is formed at the water outlet. This causes the working medium in the cavity to be air when the vertical centrifugal pump is running again, the air cannot be discharged from the water outlet, nor can it be discharged from the water inlet, the pressure generated by the rotation of the impeller in the cavity is not enough to overcome the sealing pressure at the water outlet, and the pressure difference between the inside and outside of the cavity is not enough to press the liquid into the cavity, resulting in the vertical centrifugal pump running empty, unable to intake liquid from the water inlet and discharge liquid from the water outlet, and the long-time rotation of the impeller can also cause damage to the driving shaft or the impeller.

[0046] Therefore, the vertical centrifugal pump 100 of the embodiment of the present application is provided with the exhaust hole 23 on the pump cover 2, the exhaust hole 23 is located above the water inlet 21 to communicate with the cavity 2a, when the cavity 2a of the vertical centrifugal pump 100 of the embodiment of the present application contains air, the vertical centrifugal pump 100 operates, the impeller 3 rotates inside the cavity 2a to compress the air to drive the air to be discharged from the exhaust hole 23, so that the liquid can be pressed into the cavity 2a, and then the water pressure generated by the rotation of the impeller 3 in the cavity 2a can be used to discharge the liquid in the cavity 2a through the water outlet 22 on the side of the pump cover 2 to successfully complete the water pumping process. The problem that the vertical centrifugal pump 100 idles due to the air in the cavity 2a can be solved, the problem that the impeller 3 or the driving shaft 12 is damaged due to the long-time idling of the impeller 3 and the inability of the impeller 3 to contact the liquid to dissipate heat can be improved, the service life of the vertical centrifugal pump 100 can be prolonged, and the working reliability of the vertical centrifugal pump 100 can be improved.

[0047] Moreover, the exhaust hole 23 is formed on the pump cover 2, the difficulty of the improvement of the vertical centrifugal pump 100 is low, the structural complexity of the vertical centrifugal pump 100 can be reduced, and the manufacturing cost can be saved.

[0048] According to the vertical centrifugal pump 100 of the embodiment of the present application, the air in the cavity 2a can be discharged from the exhaust hole 23, the liquid at the bottom of the vertical centrifugal pump 100 can smoothly enter the cavity 2a and be discharged from the water outlet 22 under the driving of the impeller 3 to complete the water pumping, so that the problem that the vertical centrifugal pump 100 idles due to the air in the cavity 2a can be solved, the problem that the impeller 3 or the driving shaft 12 is damaged due to the long-time idling of the impeller 3 and the inability of the impeller 3 to contact the liquid to dissipate heat can be improved, and the working reliability of the vertical centrifugal pump 100 can be improved.

[0049] In some embodiments of the present application, as shown in FIGS. 2 and 3, the pump body 1 and the pump cover 2 are fixedly connected through a plurality of threaded fasteners 4, the plurality of threaded fasteners 4 are arranged at intervals along the circumference of the pump body 1, and the connection stability of the pump body 1 and the pump cover 2 can be improved.

[0050] In some embodiments of the present application, as shown in FIG. 3, the upper surface of the impeller 3 is provided with the impeller hole 33 extending downward, and the driving shaft 12 is inserted into the impeller hole 33 downward to drive the impeller 3 to rotate. The impeller hole 33 is a non-circular hole, and the cross-sectional shape of the driving shaft 12 corresponds to the impeller hole 33, so that the connection stability of the driving shaft 12 and the impeller 3 can be improved, and the rotation reliability of the impeller 3 can be improved. Alternatively, the driving shaft 12 and the impeller 3 can be in key connection to achieve transmission.

[0051] In some embodiments of the present application, as shown in FIGS. 4 and 5, the exhaust hole 23 is lower than the upper end of the water outlet 22.

[0052] The horizontal water pump (horizontal refers to the driving shaft extending along the horizontal direction, which can be absolutely horizontal or slightly inclined to the horizontal direction) in the related art sets the exhaust hole higher than the upper end of the drain port. Since the air density is less than the density of water, the air is located above the water surface. After the liquid enters the cavity and the air is discharged from the exhaust hole, the liquid directly flows out of the drain port due to the higher position of the exhaust hole. This will always leave air in the cavity, which will affect the normal operation of the vertical centrifugal pump, and the abnormal noise generated by the liquid flowing in the cavity is large.

[0053] The vertical centrifugal pump 100 of the embodiment of the present application sets the exhaust hole 23 lower than the upper end of the drain port 22. After the liquid enters the cavity 2a and the air is discharged from the exhaust hole 23, the liquid level can be higher than the exhaust hole 23 to reach the drain port 22, so that it can be discharged from the drain port 22, which can improve the working reliability of the vertical centrifugal pump 100 and reduce the noise during the operation of the vertical centrifugal pump 100.

[0054] In some embodiments of the present application, as shown in FIGS. 4 and 5, the aperture of the exhaust hole 23 is smaller than the flow area of the drain port 22.

[0055] The small aperture of the exhaust hole 23 can smoothly discharge the air in the cavity 2a without causing a large amount of liquid to flow out of the exhaust hole 23. The liquid mainly flows out of the drain hole with a larger flow area, which improves the working stability of the vertical centrifugal pump 100 for pumping water. Moreover, by setting the aperture of the exhaust hole 23 to be small, the structural stability of the pump cover 2 can also be ensured, further improving the working reliability of the vertical centrifugal pump 100.

[0056] In some embodiments of the present application, as shown in FIGS. 4 and 5, the pump cover 2 includes a water inlet section 2b and a volute section 2c. The water inlet section 2b is connected to the bottom of the volute section 2c. The water inlet 21 is formed at the lower end of the water inlet section 2b. The side of the volute section 2c extends out of a diffusion section 2c1. The outlet end of the diffusion section 2c1 is formed as the drain port 22. The exhaust hole 23 is formed on the volute section 2c or the upper end of the water inlet section 2b. In this way, the exhaust hole 23 can be closer to the drain position, thereby facilitating air exhaust and enabling the water to be smoothly discharged.

[0057] For example, as shown in FIGS. 4 and 5, the pump cover 2 includes a water inlet section 2b and a volute section 2c. The water inlet section 2b is formed in a cylindrical shape, and the diameter of the water inlet section 2b is smaller than the diameter of the volute section 2c. The axes of the volute section 2c and the water inlet section 2b both extend vertically. The water inlet section 2b is connected to the bottom of the volute section 2c. The water inlet 21 is formed at the lower end of the water inlet section 2b. The side of the volute section 2c extends out of a diffusion section 2c1. The outlet end of the diffusion section 2c1 is formed as the drain port 22.

[0058] The water inlet section 2b is located at the bottom of the volute section 2c, the lower end of the water inlet section 2b is formed with a water inlet 21, and the side of the volute section 2c is formed with a water outlet 22, so that the rotation of the impeller 3 generates water pressure to make the liquid quickly rise to the volute section 2c through the water inlet section 2b, and then the liquid is driven by the impeller 3 to rotate in the volute section 2c and is discharged from the water outlet 22. The diameter of the water inlet section 2b is smaller than the diameter of the volute section 2c, which can accelerate the process of the liquid rising to the volute section 2c, thereby improving the working efficiency of the vertical centrifugal pump 100. By arranging the volute section 2c, the liquid can flow to the water outlet 22 uniformly and symmetrically with minimum hydraulic loss, thereby improving the working efficiency of the impeller 3 and effectively utilizing the hydraulic resources.

[0059] As shown in FIGS. 2 and 6, the impeller 3 includes a first impeller 31 and a second impeller 32, the first impeller 31 is connected above the second impeller 32, the diameter of the first impeller 31 is larger than that of the second impeller 32, the first impeller 31 is arranged in the volute section 2c, at least part of the second impeller 32 is arranged in the water inlet section 2b, and the air vent 23 is formed on the volute section 2c or the upper end of the water inlet section 2b.

[0060] The first impeller 31 is arranged in the volute section 2c, and at least part of the second impeller 32 is arranged in the water inlet section 2b, so that the diameter of the first impeller 31 is larger than that of the second impeller 32, the first impeller 31 can generate greater pressure relative to the second impeller 32, the water discharged from the water outlet 22 has greater lift, the structure of the impeller 3 and the structure of the pump cover 2 are better matched, and the water pumping effect of the vertical centrifugal pump 100 can be improved.

[0061] The air vent 23 is formed on the volute section 2c or the upper end of the water inlet section 2b, so that the air in the cavity 2a can be discharged as much as possible to make the liquid smoothly enter the volute section 2c and contact the impeller 3, so that the liquid is driven by the impeller 3 to form water pressure to make the liquid flow smoothly from the water inlet 21 to the water outlet 22, and the working reliability of the vertical centrifugal pump 100 is improved.

[0062] In some embodiments of the present application, as shown in FIGS. 4 and 8, the air vent 23 is formed on the side of the volute section 2c and is located on the side of the volute tongue of the diffuser section 2c1 close to the volute section 2c.

[0063] The air vent 23 is arranged on the volute section 2c, so that the air in the cavity 2a can be discharged to make the liquid smoothly enter the volute section 2c and contact the impeller 3. By forming the air vent 23 on the volute section 2c adjacent to the diffuser section 2c1, the liquid flowing to the water outlet 22 can accelerate the rapid discharge of air, and the air exhaust efficiency of the vertical centrifugal pump 100 can be improved.

[0064] The air exhaust hole 23 is arranged at the side of the diffuser section 2c1 close to the volute tongue of the volute section 2c, so that the air exhaust speed in the cavity 2a is improved. The air exhaust hole 23 arranged close to the volute tongue also helps to reduce the air flow noise when the air is exhausted, effectively reducing the noise when the air is exhausted.

[0065] In some embodiments of the present application, the central angle between the air exhaust hole 23 and the diffuser section 2c1 is less than 90°, wherein the first connecting line is a line connecting the edge of the diffuser section 2c1 close to the volute section 2c in the circumferential direction of the volute section 2c and the center of the volute section 2c, the second connecting line is a line connecting the edge of the diffuser section 2c1 close to the air exhaust hole 23 in the circumferential direction of the volute section 2c and the center of the volute section 2c, and the included angle between the first connecting line and the second connecting line is the central angle between the air exhaust hole 23 and the diffuser section 2c1.

[0066] The air exhaust hole 23 is arranged at the side of the volute section 2c close to the diffuser section 2c1, so that the liquid flowing to the drain port 22 of the diffuser section 2c1 can drive the air to flow to the air exhaust hole 23, accelerate the air to be quickly exhausted, and improve the working reliability of the vertical centrifugal pump 100.

[0067] In some embodiments of the present application, the air exhaust hole 23 is multiple and arranged at intervals along the circumferential direction of the volute section 2c. By arranging multiple air exhaust holes 23, the air exhaust speed can be improved, which is beneficial to improve the working efficiency of the vertical centrifugal pump 100.

[0068] In some embodiments of the present application, as shown in FIGS. 4 and 8, the air exhaust hole 23 is located at the lower part of the side of the volute section 2c.

[0069] By arranging the air exhaust hole 23 at the lower part of the side of the volute section 2c, the air exhaust hole 23 is arranged lower than the drain port 22 of the side of the volute section 2c. When the liquid enters the cavity 2a and the liquid level is higher than the air exhaust hole 23, it can continue to flow upward to be drained from the drain port 22, which can improve the working reliability of the vertical centrifugal pump 100 and reduce the noise during the working of the vertical centrifugal pump 100.

[0070] In some embodiments of the present application, as shown in FIGS. 9 and 10, the pump cover 2 includes a water inlet section 2b and a volute section 2c, the water inlet section 2b is connected to the bottom of the volute section 2c, the impeller 3 includes a first impeller 31 and a second impeller 32, the first impeller 31 is connected above the second impeller 32 and located in the volute section 2c, at least part of the second impeller 32 is arranged in the water inlet section 2b, and the diameter of the first impeller 31 is greater than the diameter of the second impeller 32.

[0071] The first impeller 31 can generate greater pressure relative to the second impeller 32, so that the water drained from the drain port 22 has greater lift.

[0072] In some embodiments, the second impeller 32 comprises a plurality of second blades 321 arranged along the circumference of the driving shaft 12, and the second blades 321 are formed as inclined blades extending obliquely to the vertical direction from bottom to top.

[0073] The second impeller 32 is arranged at least partially in the water inlet section 2b, and the first impeller 31 is arranged in the volute section 2c. The second impeller 32 is used to quickly send the water at the bottom of the vertical centrifugal pump 100 into the volute section 2c through the water inlet section 2b. Therefore, in the embodiments of the present application, the second blades 321 are arranged as inclined blades extending obliquely to the vertical direction from bottom to top, so as to improve the water guiding ability of the second impeller 32 in the vertical direction, improve the efficiency of the water flow from the water inlet section 2b into the volute section 2c, and further improve the water pumping capacity of the vertical centrifugal pump 100.

[0074] As shown in FIG. 9, the dashed line with arrows is the force direction of the liquid when the second impeller 32 rotates. In the figure, Fcentrifugal is the centrifugal force generated by the second impeller 32 to drive the liquid, and the inclined blade design makes the driving force be obliquely upward, as shown by Fdrive in the figure. Finally, the upward liquid lift force is increased, that is, Flift in the figure. The inclined blade design of the second impeller 32 can improve the liquid lift force in the vertical upward direction, thereby increasing the liquid pressure in the vertical upward direction, and facilitating the improvement of the suction working pressure of the vertical centrifugal pump 100.

[0075] In some embodiments of the present application, the first impeller 31 comprises a plurality of first blades 311 arranged along the circumference of the driving shaft 12, and the first blades 311 are also formed as inclined blades extending obliquely to the vertical direction from bottom to top.

[0076] Both the second blades 321 and the first blades 311 are inclined blades extending obliquely to the vertical direction from bottom to top, which can further improve the liquid lift force in the vertical upward direction, improve the water guiding ability of the impeller 3 in the upward direction, and be beneficial to improving the working efficiency of the vertical centrifugal pump 100.

[0077] In some embodiments of the present application, as shown in FIG. 11, the upper end of the second blade 321 extends into the volute section 2c.

[0078] The second impeller 32 is used to quickly send the water at the bottom of the vertical centrifugal pump 100 into the volute section 2c through the water inlet section 2b. The upper end of the second blade 321 of the second impeller 32 extends into the volute section 2c, so as to facilitate the second impeller 32 to quickly connect and guide the water flow from the water inlet 21 to the volute section 2c after introducing the water flow, form a continuous working medium operation, and improve the water pumping efficiency. As shown in FIGS. 6 and 11, the dashed line with arrows is the schematic direction of the liquid flow.

[0079] In some embodiments of the present application, as shown in FIGS. 9 and 10, the first impeller 31 includes a plurality of first blades 311 arranged along the circumference of the driving shaft 12, and the second impeller 32 includes a plurality of second blades 321 arranged along the circumference of the driving shaft 12, the height of the first blades 311 in the up-down direction is less than the height of the second blades 321 in the up-down direction.

[0080] The second impeller 32 is used to quickly send the water at the bottom of the vertical centrifugal pump 100 into the volute section 2c through the water inlet section 2b, the first impeller 31 rotates to generate water pressure to drive the liquid in the cavity 2a to be discharged to the water outlet 22, therefore, the height of the second blades 321 in the up-down direction is higher, which is conducive to guiding the liquid upward, and the height of the first blades 311 in the up-down direction is smaller, which can reduce the overall height of the impeller 3 and the gravity center of the vertical centrifugal pump 100, and is conducive to improving the working stability of the vertical centrifugal pump 100.

[0081] Correspondingly, as shown in FIGS. 9 and 10, the diameter of the first impeller 31 is greater than the diameter of the second impeller 32, which can increase the centrifugal force generated when the first impeller 31 rotates, improve the driving effect on the liquid, and is conducive to increasing the water pressure formed, so that the water discharged from the water outlet 22 has greater lift, and the water pumping efficiency of the vertical centrifugal pump 100 is improved.

[0082] The air conditioner of the second aspect of the present application is described below with reference to the accompanying drawings.

[0083] According to the air conditioner of the present application, the condensate water treatment system includes a water collecting tray 200, a water drainage pipeline, and a vertical centrifugal pump 100 according to the first aspect of the present application, the vertical centrifugal pump 100 is vertically arranged on the water collecting tray 200, the water inlet 21 is located at the lower end of the vertical centrifugal pump 100 and in the water storage cavity 201 of the water collecting tray 200, and the water outlet 22 is connected with the water inlet end of the water drainage pipeline.

[0084] The water collecting tray 200 is used to collect condensate water, the vertical centrifugal pump 100 is arranged on the water collecting tray 200, the vertical centrifugal pump 100 is used to guide the condensate water accumulated in the water storage cavity 201 of the water collecting tray 200 out of the water outlet 22, and the water drainage pipeline guides the condensate water to a remote place, such as an outdoor side or a sewer drainage place, so that the condensate water of the air conditioner can be treated, and the overflow of the condensate water can be avoided, and the working stability of the air conditioner is improved.

[0085] By arranging the vertical centrifugal pump 100 according to the first aspect of the present application, the vertical centrifugal pump 100 is arranged on the water pan 200 in the vertical direction, which can reduce the space occupation of the water pan 200 compared with arranging a horizontal centrifugal pump, thereby reducing the arrangement difficulty of the condensate water treatment system and facilitating to increase the water storage capacity of the water pan 200. By arranging the vertical centrifugal pump 100 according to the first aspect of the present application, the internal cavity exhaust problem of the vertical centrifugal pump 100 can be solved, the water pumping operation function can be smoothly realized, the working reliability of the condensate water treatment system can be improved, and the use effect of the air conditioner can be improved.

[0086] In some embodiments of the present application, as shown in FIG. 12, the air conditioner comprises a base 300, the heat exchanger of the air conditioner is arranged on the base 300, and the water pan 200 is formed on the base 300, and the water pan 200 is used to receive the condensate water generated by the heat exchanger.

[0087] In some embodiments of the present application, the air conditioner is a window air conditioner, and the condensate water treatment system further comprises a spray head, and the water outlet end of the drain pipeline is connected with the spray head. The spray head atomizes and sprays the condensate water discharged by the drain pipeline, thereby consuming the condensate water.

[0088] In some embodiments of the present application, the spray head is arranged at the outdoor part of the window air conditioner, and the spray head directly sprays toward the outdoor or the air outlet side of the outdoor fan, thereby facilitating to improve the spraying efficiency.

[0089] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential” and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0090] In addition, the terms “first” and “second” are only for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with “first” and “second” can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of “plurality” is two or more, unless otherwise specifically limited.

[0091] In this application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixed", and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0092] In this application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0093] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0094] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A vertical centrifugal pump, wherein, The utility model relates to a pump, comprising: a pump body comprising a pump shell and a drive shaft extending downward from a lower end of the pump shell; a pump cover arranged at a bottom of the pump body and forming a cavity with the pump shell, the pump cover being provided with a water inlet and a water outlet communicating with the cavity, the water inlet being arranged at a lower end of the pump cover, and the water outlet being arranged at a side of the pump cover and being higher than the water inlet; an impeller arranged in the cavity and connected with the drive shaft extending into the cavity; wherein the pump cover is further provided with an exhaust hole communicating with the cavity and being higher than the water inlet.

2. The vertical centrifugal pump of claim 1, wherein, The exhaust hole is lower than an upper end of the water outlet; and / or the exhaust hole has a smaller diameter than an overflow area of the water outlet.

3. A vertical centrifugal pump according to claim 1 or 2, wherein The pump cover comprises a water inlet section and a volute section, the water inlet section being connected at a bottom of the volute section, the water inlet being formed at a lower end of the water inlet section, a side of the volute section extending out of a diffuser section, an outlet end of the diffuser section forming the water outlet, and the exhaust hole being formed on the volute section or an upper end of the water inlet section.

4. The vertical centrifugal pump of claim 3, wherein, The exhaust hole is formed at a side of the volute section and is located at a side of the diffuser section close to a volute tongue of the volute section.

5. The vertical centrifugal pump of claim 4, wherein, A central angle between the exhaust hole and the diffuser section is less than 90 degrees.

6. A vertical centrifugal pump according to claim 4 or 5, wherein, The exhaust hole is a plurality of exhaust holes and is arranged at intervals along a circumferential direction of the volute section.

7. A vertical centrifugal pump according to any one of claims 4-6, wherein, The exhaust hole is located at a lower part of the side of the volute section.

8. A vertical centrifugal pump according to any one of claims 3-7, wherein, The water inlet section is formed in a cylindrical shape, the diameter of the water inlet section is smaller than the diameter of the volute section, the impeller comprises a first impeller and a second impeller, the first impeller is connected above the second impeller and is located in the volute section, at least a part of the second impeller is arranged in the water inlet section, and the diameter of the first impeller is larger than the diameter of the second impeller.

9. The vertical centrifugal pump of any one of claims 1-8, wherein, The pump cover comprises a water inlet section and a volute section, the water inlet section being connected at a bottom of the volute section, the impeller comprising a first impeller and a second impeller, the first impeller being connected above the second impeller and being located in the volute section, at least a part of the second impeller being arranged in the water inlet section, and the diameter of the first impeller being larger than the diameter of the second impeller.

10. The vertical centrifugal pump of claim 9, wherein, The second impeller comprises a plurality of second blades arranged at intervals along a circumferential direction of the drive shaft, the second blades being formed as inclined blades extending in an inclined manner from bottom to top with respect to a vertical direction.

11. A vertical centrifugal pump according to claim 9 or 10, wherein An upper end of the second blade extends into the volute section.

12. A vertical centrifugal pump according to any one of claims 9-11, wherein, The first impeller comprises a plurality of first blades arranged at intervals along a circumferential direction of the drive shaft, the second impeller comprises a plurality of second blades arranged at intervals along a circumferential direction of the drive shaft, and a height of the first blades in a vertical direction is smaller than a height of the second blades in the vertical direction.

13. The vertical centrifugal pump according to any one of claims 9-12, wherein, The water inlet section is formed in a cylindrical shape, the diameter of the water inlet section is smaller than the diameter of the volute section, the water inlet is formed at a lower end of the water inlet section, and the water outlet is arranged at a side of the volute section.

14. An air conditioner, wherein, The utility model relates to a pump, comprising: The condensate water treatment system comprises a water receiving tray, a drain pipeline and the vertical centrifugal pump according to any one of claims 1-13, the vertical centrifugal pump is vertically arranged on the water receiving tray, the water inlet is located at the lower end of the vertical centrifugal pump and in the water containing cavity of the water receiving tray, and the water outlet is connected with the water inlet end of the drain pipeline.

15. The air conditioner of claim 14, wherein, The air conditioner is a window machine, and the condensate water treatment system further comprises a spraying head, and the water outlet end of the drain pipeline is connected with the spraying head.

Images