Ceiling machine with draining pump and centrifugal fan coaxially driven

Abstract

The invention discloses a ceiling machine with a draining pump and a centrifugal fan coaxially driven. The ceiling machine comprises a water pan, a draining pump assembly and a motor assembly. A supporting seat is arranged in the water pan, the supporting seat is provided with a placing groove, a connecting pipe and a plurality of water inlet pipes, and the plurality of water inlet pipes are communicated with the water pan; the drainage pump assembly is fixedly connected in the water pan, one end of the connecting pipe is connected with the drainage pump assembly, the other end of the connecting pipe is communicated with the outside, a first starting part, a floating body, a drainage hole and a plurality of water inlet holes are arranged in the drainage pump assembly, and the floating body is used for driving the first starting part to float upwards; the water inlet end of the water drainage pipe is higher than the water drainage end of the water drainage pipe; the motor assembly is connected to the top of the drainage pump assembly, the motor assembly is provided with a second starting piece, when the first starting piece is close to the second starting piece, the motor assembly is started, and the drainage pump assembly is used for discharging liquid outwards. Accumulation of condensate water can be accelerated by arranging the drainage pipe and the multiple water inlet pipes, and the problem that the pump body loses efficacy under the low-water-amount working condition is solved.

Description

Technical Field

[0001] This invention relates to the field of ceiling machine technology, and more particularly to a ceiling machine in which a drainage pump and a centrifugal fan are coaxially driven. Background Technology

[0002] Ordinary ceiling-mounted air conditioner drain pumps require a certain water level to trigger startup. Under low water conditions, such as the initial stage of low-load cooling and dehumidification, condensate accumulates slowly, causing the float to rise slowly or even fail to rise at all. This results in the drain pump running dry or not starting, ultimately leading to condensate overflow and ceiling leaks. On the other hand, when the drain pump has insufficient water, it is prone to cavitation during startup due to lack of liquid, which means the impeller of the drain pump runs dry and wears out, shortening the pump's lifespan.

[0003] In the prior art, Chinese patent document CN119943615A discloses a float switch mounting structure and a ceiling-mounted air conditioning unit. The float switch mounting structure includes a float switch and a frame. The float switch is disposed inside the frame, which includes a first side plate, a second side plate, a third side plate, and a fourth side plate. The third and second side plates are positioned opposite each other, located on the left and right sides of the float switch, respectively. The first side plate is located on the front side, and the fourth side plate is located on the top side. The float switch is connected to the ceiling-mounted air conditioning unit via the fourth side plate. No side plate is needed on the rear side of the frame; the float switch is enclosed by the housing and frame to prevent wind generated by the ceiling-mounted air conditioning unit's duct from blowing it. The float switch mounting structure also includes a first magnetic component, a second magnetic component, and a mounting bracket. Under the buoyancy of the water, the float switch moves towards the second magnetic component, causing the first and second magnetic components to contact each other, thereby transmitting an electrical signal to the water pump, triggering the water pump to start working and promptly drain the condensate generated in the water tray. This ceiling machine controls the start and stop of the water pump through the float switch. However, when condensate accumulates slowly, the drain pump may still run dry or fail to start.

[0004] Therefore, the technical problem to be solved by this application is: how to prevent the drainage pump from failing to start. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides a ceiling-mounted pump with a drainage pump and a centrifugal fan driven coaxially. Multiple inlet pipes can increase the water intake, thereby facilitating the first starting component to approach the second starting component under the action of the float to start the motor assembly and drainage pump assembly. This avoids the problem of slow condensate accumulation causing the drainage pump to run dry. On the other hand, when the internal water level of the drainage pump assembly is insufficient, the drainage pump will experience cavitation due to lack of liquid when starting. The drainage pipes ensure the internal water level of the drainage pump when starting, thereby avoiding cavitation and shortening the service life of the drainage pump.

[0006] Correspondingly, a ceiling-mounted machine coaxially driven by a drainage pump and a centrifugal fan includes a water receiving tray, a drainage pump assembly, and a motor assembly; the water receiving tray is provided with a support base, the support base is provided with a placement groove, and a connecting pipe and multiple water inlet pipes are fixed on the inner wall of the placement groove, and the water inlet ends of the multiple water inlet pipes all pass through the support base and communicate with the water receiving tray. The drainage pump assembly is fixedly connected in the water receiving tray and located in the placement groove. One end of the connecting pipe is connected to the outer peripheral wall of the drainage pump assembly, and the other end is connected to the outside. The drainage pump assembly is provided with a first starting element, a float, a drain hole and multiple water inlets. The drain hole is arranged higher than all the water inlets. Multiple water inlets correspond to and are connected to the multiple water inlets. The first starting element and the float are both located inside the drainage pump assembly. The float is used to drive the first starting element to float under the action of the liquid. A drain pipe is provided on the outer peripheral wall of the connecting pipe. The inlet end of the drain pipe is connected to the drain hole, and the outlet end of the drain pipe is connected to the connecting pipe. The inlet end of the drain pipe is higher than the outlet end of the drain pipe. The motor assembly is connected to the top of the drain pump assembly. The motor assembly is equipped with a second starter. When the first starter floats up to a preset height to approach the second starter, the motor assembly starts, and the drain pump assembly is used to discharge liquid from the drain hole.

[0007] Preferably, the drainage pump assembly includes a pump housing and a drainage paddle. The pump housing is fixedly connected to the water receiving tray and located in the placement groove. The pump housing has a receiving cavity, and a drainage hole and multiple water inlets are provided on the outer peripheral wall of the receiving cavity. The drainage paddle is placed inside the pump housing and is used to discharge liquid from inside the pump housing to the outside. The first starting element and the float are both sleeved on the drainage paddle, and the float is located between the first starting element and the drainage paddle.

[0008] Preferably, the motor assembly includes a drive motor and a permanent magnet. The permanent magnet is sleeved on the top of the water pump housing. The bottom of the drive motor is provided with a connecting shaft, one end of which is connected to the permanent magnet. The top of the drainage paddle is provided with a connecting column. The drainage pump assembly also includes a float and a copper rotor. Both the float and the copper rotor are sleeved on the outer peripheral wall of the connecting column. The copper rotor is located on the end of the connecting column away from the drainage paddle. The float is located between the copper rotor and the drainage paddle. When the drainage paddle is located at the bottom of the receiving cavity, there is a gap between the copper rotor and the top of the receiving cavity. The float is used to drive the copper rotor to float up to approach the permanent magnet under the action of the liquid in the receiving cavity. When the copper rotor is driven to float up to a preset height by the float, the drive motor and the drainage paddle rotate. The copper rotor is the first starting element, and the permanent magnet is the second starting element.

[0009] Preferably, the gap is 2~5mm.

[0010] Preferably, the length of the connecting shaft is 2~10mm.

[0011] Preferably, the outer peripheral wall of the water pump housing is provided with a connecting groove, the connecting groove is provided with an internal thread, one end of the connecting pipe is a closed end, the closed end of the connecting pipe is provided with an external thread that matches the internal thread, the connecting pipe is screwed onto the water pump housing, and the water inlet end of the drain pipe is connected to the drain hole.

[0012] Preferably, the drain pipe includes a horizontally arranged first pipe body and a vertically arranged second pipe body. One end of the first pipe body is connected to a drain hole, and the other end is connected to one end of the second pipe body. The other end of the second pipe body is connected to a connecting pipe. The end of the first pipe body connected to the drain hole is the water inlet end of the drain pipe, and the end of the second pipe body connected to the connecting pipe is the drain outlet end of the drain pipe.

[0013] Preferably, a centrifugal fan is provided at the output end of the drive motor.

[0014] Preferably, multiple water inlets are located at the same height.

[0015] Preferably, a connector is fixed on the water inlet hole, the drain end of the water inlet pipe is connected to the connector, and the connector is connected to the receiving cavity.

[0016] The beneficial effects of this invention are: This invention increases the water intake through multiple inlet pipes, which facilitates the first starting component to move closer to the second starting component under the action of the float to start the motor assembly and the drain pump assembly. This avoids the problem of slow condensate accumulation causing the drain pump to run dry. On the other hand, when the internal water level of the drain pump assembly is insufficient, the drain pump will experience cavitation due to lack of liquid when starting. By setting up the drain pipes, the internal water level of the drain pump can be guaranteed when starting, thereby avoiding cavitation and shortening the service life of the drain pump. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the connecting pipe in this invention; Figure 3 yes Figure 2 A magnified view of a portion of the image; Figure 4 This is a schematic diagram of the motor assembly in this invention; Figure 5 This is an exploded view of the drainage pump assembly in this invention; Figure 6 This is a schematic diagram of the initial state of Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the startup state of Embodiment 1 of the present invention. Attached Figure

[0019] 1. Water receiving tray; 11. Support base; 111. Placement slot; 12. Connecting pipe; 121. Drain pipe; 1211. First pipe body; 1212. Second pipe body; 122. External thread; 13. Water inlet pipe; 2. Drain pump assembly; 21. Copper rotor; 22. Float; 23. Pump housing; 231. Drain hole; 232. Water inlet hole; 2321. Connector; 233. Receiving cavity; 234. Gap; 235. Connecting slot; 236. Internal thread; 24. Drain paddle; 241. Connecting column; 3. Motor assembly; 31. Permanent magnet; 32. Drive motor; 321. Connecting shaft. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the connecting pipe in this invention; Figure 3 yes Figure 2 A magnified view of a portion of the image; Figure 4 This is a schematic diagram of the motor assembly in this invention; Figure 5 This is an exploded view of the drainage pump assembly in this invention; Figure 6 This is a schematic diagram of the initial state of Embodiment 1 of the present invention; Figure 7 Please refer to the schematic diagram of the startup state of Embodiment 1 of the present invention. Figure 1-7A ceiling-mounted unit coaxially driven by a drainage pump and a centrifugal fan includes a water receiving tray 1, a drainage pump assembly 2, and a motor assembly 3. The water receiving tray 1 has a support base 11 with a placement groove 111. A connecting pipe 12 and multiple inlet pipes 13 are fixedly mounted on the inner wall of the placement groove 111, with the inlet ends of the multiple inlet pipes 13 passing through the support base 11 and communicating with the water receiving tray 1. The drainage pump assembly 2 is fixedly connected to the water receiving tray 1 and located within the placement groove 111. One end of the connecting pipe 12 is connected to the outer peripheral wall of the drainage pump assembly 2, and the other end communicates with the outside. The drainage pump assembly 2 has a first starting component, a float 22, a drainage hole 231, and multiple inlet holes 232, with the drainage hole 231 positioned higher than all the inlet holes 232. Multiple water inlet pipes 13 correspond one-to-one with multiple water inlet holes 232 and are connected. The first starting component and the float 22 are both located inside the drain pump assembly 2. The float 22 is used to drive the first starting component to float under the action of liquid. A drain pipe 121 is provided on the outer peripheral wall of the connecting pipe 12. The water inlet end of the drain pipe 121 is connected to the drain hole 231, and the drain end of the drain pipe 121 is connected to the connecting pipe 12. The water inlet end of the drain pipe 121 is higher than the drain end of the drain pipe 121. The motor assembly 3 is connected to the top of the drain pump assembly 2. The motor assembly 3 is provided with a second starting component. When the first starting component floats up to a preset height to approach the second starting component, the motor assembly 3 starts, and the drain pump assembly 2 is used to discharge liquid from the drain hole 231.

[0022] It should be noted that the water in the drip tray 1 in this embodiment is condensate produced by the air conditioner.

[0023] In practical applications, the condensate produced by the air conditioner enters the drip tray 1 and is guided to the drain pump assembly 2 through multiple inlet pipes 13. When there is enough condensate, the float 22 rises, causing the first starter to rise as well. When the first starter rises to a preset height and approaches the second starter, the motor assembly 3 starts, and the drain pump assembly 2 also starts, thus discharging the water inside the drain pump assembly 2 out through the drain hole 231. The water in the drain hole 231 is then guided through the drain pipe 121 to the connecting pipe 12 for discharge, thereby preventing condensate from remaining in the drip tray 1, which could cause the internal equipment of the ceiling unit to become damp or even corroded, and in severe cases, lead to problems such as ceiling leakage. This starting method avoids mechanical contact wear, but it relies on the drain pump assembly. The condensate capacity inside component 2 allows the condensate generated during ceiling machine operation to enter the drain pump assembly 2 through multiple inlet pipes 13, accelerating the condensate's entry into the drain pump assembly 2. Furthermore, the design of the drain hole 231 being higher than the inlet hole 232 ensures that the condensate inside the drain pump assembly 2 remains at a certain level during subsequent drainage processes after the first drainage. Therefore, even in low-volume conditions, the required drainage capacity can be easily achieved after the first drainage, thus avoiding startup failure. In other words, in low-volume conditions, condensate accumulates slowly, and the first starting component cannot float to the preset height via the float 22, causing the pump to run dry or fail to start, leading to condensate overflow and ceiling leakage.

[0024] On the other hand, the height difference between the drain pipe 121 and the connecting pipe 12 can increase the water pressure when the connecting pipe 12 drains water, thus avoiding the problem of slow drainage and residual water accumulation caused by the long connecting pipe 12. In the prior art, drainage is carried out through a single connecting pipe 12, while in this embodiment, a drain pipe 121 is added to the connecting pipe 12 and the end of the connecting pipe 12 connected to the drain pump assembly 2 is sealed. The modification is simple and does not require modification of the pump body or circuit, and it can be adapted to most ceiling machine drainage interfaces on the market. On the other hand, when the drain pump assembly 2 has insufficient water, cavitation is likely to occur when starting due to the lack of medium in the pump body. That is, the impeller of the drain pump assembly 2 will wear due to idling, which will shorten the pump body's life. However, by making the drain hole 231 higher than the inlet hole 232 and the drain pipe 121 working together, the water level in the drain pump assembly 2 can be maintained continuously, thus ensuring that the drain pump assembly 2 is always below the liquid level when starting, that is, the drain pump assembly 2 has medium when starting, thereby avoiding cavitation and extending the service life of the drain pump assembly 2.

[0025] Preferably, the drainage pump assembly 2 includes a pump housing 23 and a drainage paddle 24. The pump housing 23 is fixedly connected to the water receiving tray 1 and located in the placement groove 111. The pump housing 23 has a receiving cavity 233. The drainage hole 231 and a plurality of water inlet holes 232 are all provided on the outer peripheral wall of the receiving cavity 233. The drainage paddle 24 is placed inside the pump housing 23 and is used to discharge liquid from inside the pump housing 23 to the outside. The first starter and the float 22 are both sleeved on the drainage paddle 24, and the float 22 is located between the first starter and the drainage paddle 24.

[0026] In this embodiment, the condensate inside the multiple water inlet pipes 13 is introduced into the receiving cavity 233. As the condensate in the receiving cavity 233 gradually increases, it should be noted that the float 22 in this embodiment is made of a material with a density lower than that of water. Therefore, the float 22 will gradually rise and drive the first starter and the drain paddle 24 to rise. The second starter is located at the top of the water pump housing 23. Therefore, as the first starter gradually rises, it will also gradually approach the second starter. Eventually, the motor assembly 3 will start, and the drain paddle 24 will rotate to discharge the water in the water pump housing 23 through the drain hole 231.

[0027] Preferably, the motor assembly 3 includes a drive motor 32 and a permanent magnet 31. The permanent magnet 31 is sleeved on the top of the water pump housing 23. The bottom of the drive motor 32 is provided with a connecting shaft 321, one end of which is connected to the permanent magnet 31. The top of the drainage paddle 24 is provided with a connecting post 241. The drainage pump assembly 2 also includes a float 22 and a copper rotor 21. Both the float 22 and the copper rotor 21 are sleeved on the outer peripheral wall of the connecting post 241. The copper rotor 21 is located on the end of the connecting post 241 away from the drainage paddle 24. The float 22 is located between the copper rotor 21 and the drainage paddle 24. When the drainage paddle 24 is located at the bottom of the receiving cavity 233, there is a gap 234 between the copper rotor 21 and the top of the receiving cavity 233. The float 22 is used to drive the copper rotor 21 to float up and approach the permanent magnet 31 under the action of the liquid in the receiving cavity 233. When the copper rotor 21 is driven to float up to the preset height by the float 22, the drive motor 32 and the drainage paddle 24 rotate. The copper rotor 21 is the first starting element and the permanent magnet 31 is the second starting element.

[0028] In this embodiment, when water in the water receiving tray 1 enters the water pump housing 23 through multiple water inlet pipes 13, the float 22 drives the copper rotor 21 to float to a preset height to start the motor assembly 3. The copper rotor 21 and the permanent magnet 31 form an electromagnetic coupling, and finally drive the motor 32 to drive the connecting shaft 321 to rotate. The permanent magnet 31 also rotates synchronously. When the permanent magnet 31 rotates, the magnetic field generated by the permanent magnet 31 induces eddy currents. The eddy currents are driven by the force to drive the copper rotor 21 to rotate, which in turn drives the impeller inside the drainage pump to rotate, that is, drives the drainage paddle 24 to rotate, thereby discharging the condensate from the water pump housing 23 to the outside. The rotation speed of the copper rotor 21 is usually 90% to 98% of the rotation speed of the permanent magnet 31. Therefore, in this way, efficient transmission can be ensured while avoiding mechanical contact wear and extending service life.

[0029] Preferably, the gap 234 is 2~5mm.

[0030] In this embodiment, the gap 234 not only provides space for the float 22 to float, but also ensures the electromagnetic coupling efficiency. The drainage paddle 24 can increase the water pressure when draining water, and can also avoid the two from directly contacting each other and causing wear, thus further extending the service life.

[0031] Preferably, the length of the connecting shaft 321 is 2~10mm.

[0032] In this embodiment, the length of the connecting shaft 321 should not be too long. Since the connecting shaft 321 drives the permanent magnet 31 to rotate, the longer the connecting shaft 321 is, the more unstable the rotation of the permanent magnet 31 becomes. The more unstable the rotation of the permanent magnet 31 becomes, the more it affects the drainage efficiency of the drainage paddle 24.

[0033] Preferably, the outer peripheral wall of the water pump housing 23 is provided with a connecting groove 235, and the connecting groove 235 is provided with an internal thread 236. One end of the connecting pipe 12 is a closed end, and the closed end of the connecting pipe 12 is provided with an external thread 122 that matches the internal thread 236. The connecting pipe 12 is screwed onto the water pump housing 23, and the water inlet end of the drain pipe 121 is connected to the drain hole 231.

[0034] In the above design, one end of the connecting pipe 12 is sealed to prevent condensate from being guided from the drain pipe 121 into the connecting pipe 12 from overflowing from the connection between the connecting pipe 12 and the water pump housing 23, which could even lead to unstable water pressure. After sealing, it can be ensured that condensate is discharged from the end of the connecting pipe 12 that is connected to the outside. Moreover, the screw connection can improve the sealing performance between the connecting pipe 12 and the water pump housing 23.

[0035] Preferably, the drain pipe 121 includes a horizontally arranged first pipe body 1211 and a vertically arranged second pipe body 1212. One end of the first pipe body 1211 is connected to the drain hole 231, and the other end is connected to one end of the second pipe body 1212. The other end of the second pipe body 1212 is connected to the connecting pipe 12. The end of the first pipe body 1211 connected to the drain hole 231 is the water inlet end of the drain pipe 121, and the end of the second pipe body 1212 connected to the connecting pipe 12 is the drain outlet end of the drain pipe 121.

[0036] In this embodiment, the first pipe 1211 and the second pipe 1212 form an L-shaped structure. The first pipe 1211, which is parallel to the connecting pipe 12, is arranged horizontally, while the second pipe 1212 connects the first pipe 1211 and the connecting pipe 12. This structure can provide a height difference, which can increase the water pressure for drainage and is beneficial for the drainage of the ceiling machine.

[0037] Preferably, the output end of the drive motor 32 is equipped with a centrifugal fan.

[0038] In the above design, the centrifugal fan is driven by the drive motor 32. The centrifugal fan can provide high air pressure and efficient air delivery, ensuring the stable operation of the air conditioning system and indoor comfort. It should be noted that the centrifugal fan is not shown in the figure.

[0039] Preferably, the multiple water inlets 232 are located at the same height.

[0040] In this embodiment, multiple water inlets 232 are located at the same height and are designed to be lower than the drain holes 231. This design ensures that when multiple water inlets 13 have condensate, it can be simultaneously introduced into the water pump housing 23, thereby improving water intake efficiency.

[0041] Preferably, a connector 2321 is fixed on the water inlet hole 232, the drain end of the water inlet pipe 13 is connected to the connector 2321, and communicates with the receiving cavity 233 through the connector 2321.

[0042] In this embodiment, the connector 2321 ensures that the condensate from the inlet pipe 13 can enter the water pump housing 23, thus improving the sealing performance.

[0043] Furthermore, the above provides a detailed description of a ceiling-mounted pump that facilitates disassembly of the water pump provided by the embodiments of the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A ceiling machine in which a drainage pump is coaxially driven with a centrifugal fan, characterized by, Including water pan (1), drain pump assembly (2), motor assembly (3); The water pan (1) is provided with a support seat (11), the support seat (11) is provided with a placing groove (111), a connecting pipe (12) and a plurality of water inlet pipes (13) are fixed on the inner wall of the placing groove (111), the water inlet ends of the plurality of water inlet pipes (13) are communicated with the water pan (1) through the support seat (11); The drain pump assembly (2) is fixedly connected in the water pan (1) and located in the placing groove (111), one end of the connecting pipe (12) is connected to the outer peripheral wall of the drain pump assembly (2), and the other end is communicated with the outside, the drain pump assembly (2) is provided with a first starting member, a float (22), a drain hole (231) and a plurality of water inlet holes (232), the drain hole (231) is arranged higher than all the water inlet holes (232), the plurality of water inlet pipes (13) correspond to and communicate with the plurality of water inlet holes (232), the first starting member and the float (22) are located in the drain pump assembly (2), the float (22) is used for driving the first starting member to float under the action of liquid; The outer peripheral wall of the connecting pipe (12) is provided with a drain pipe (121), the water inlet end of the drain pipe (121) is communicated with the drain hole (231), the water outlet end of the drain pipe (121) is communicated with the connecting pipe (12), and the water inlet end of the drain pipe (121) is higher than the water outlet end of the drain pipe (121); The motor assembly (3) is connected to the top of the drain pump assembly (2), the motor assembly (3) is provided with a second starting member, when the first starting member floats to a predetermined height to be close to the second starting member, the motor assembly (3) is started, and the drain pump assembly (2) is used for discharging liquid from the drain hole (231) to the outside.

2. The ceiling machine of claim 1, wherein The drain pump assembly (2) comprises a water pump housing (23) and a drain paddle (24), the water pump housing (23) is fixedly connected in the water pan (1) and located in the placing groove (111), the water pump housing (23) is provided with a containing cavity (233), the drain hole (231) and the plurality of water inlet holes (232) are arranged on the outer peripheral wall of the containing cavity (233), the drain paddle (24) is arranged in the water pump housing (23), the drain paddle (24) is used for discharging liquid from the water pump housing (23) to the outside, the first starting member and the float (22) are sleeved on the drain paddle (24), and the float (22) is located between the first starting member and the drain paddle (24).

3. The ceiling machine of claim 2, wherein The motor assembly (3) comprises a driving motor (32) and a permanent magnet (31), the permanent magnet (31) is sleeved on the top of the water pump shell (23), the bottom of the driving motor (32) is provided with a connecting shaft (321), one end of the connecting shaft (321) is connected with the permanent magnet (31), the top of the drainage paddle (24) is provided with a connecting column (241), the drainage pump assembly (2) further comprises a copper rotor (21), the floating body (22) and the copper rotor (21) are both sleeved on the outer circumferential wall of the connecting column (241), the copper rotor (21) is located on the end of the connecting column (241) away from the drainage paddle (24), the floating body (22) is located between the copper rotor (21) and the drainage paddle (24), when the drainage paddle (24) is located at the bottom in the containing cavity (233), the copper rotor (21) is provided with a gap (234) at the top in the containing cavity (233), the floating body (22) is used for driving the copper rotor (21) to float up to be close to the permanent magnet (31) under the action of the liquid in the containing cavity (233), when the copper rotor (21) is driven to float up to a preset height by the floating body (22), the driving motor (32) and the drainage paddle (24) rotate, the copper rotor (21) is the first starting piece, and the permanent magnet (31) is the second starting piece.

4. The ceiling machine of claim 3, wherein The gap (234) is 2-5 mm.

5. The ceiling machine of claim 3, wherein The length of the connecting shaft (321) is 2-10 mm.

6. The ceiling machine of claim 2 wherein, The outer circumferential wall of the water pump shell (23) is provided with a connecting groove (235), the connecting groove (235) is provided with an internal thread (236), one end of the connecting pipe (12) is a closed end, the closed end of the connecting pipe (12) is provided with an external thread (122) matched with the internal thread (236), the connecting pipe (12) is screwed on the water pump shell (23), and the water inlet end of the drainage pipe (121) is communicated with the drainage hole (231).

7. The ceiling machine of claim 1 wherein, The drainage pipe (121) comprises a horizontally arranged first pipe body (1211) and a vertically arranged second pipe body (1212), one end of the first pipe body (1211) is communicated with the drainage hole (231), and the other end is communicated with one end of the second pipe body (1212), the other end of the second pipe body (1212) is communicated with the connecting pipe (12), the end of the first pipe body (1211) communicated with the drainage hole (231) is the water inlet end of the drainage pipe (121), and the end of the second pipe body (1212) communicated with the connecting pipe (12) is the drainage end of the drainage pipe (121).

8. The ceiling machine of claim 3, wherein The output end of the driving motor (32) is provided with a centrifugal fan.

9. The ceiling machine of claim 1 wherein, A plurality of the water inlet holes (232) are located at the same height.

10. The ceiling machine of claim 2 wherein, A joint (2321) is fixedly arranged on the water inlet hole (232), the drainage end of the water inlet pipe (13) is connected with the joint (2321) and communicated with the containing cavity (233) through the joint (2321).

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