Water-cooled variable speed motor and intelligent water pump

Abstract

The present invention discloses a water-cooled variable-speed motor and an intelligent water pump. The water-cooled variable-speed motor comprises a housing, a stator, a rotor, a rotating shaft, a mounting seat, an end cover, and a frequency conversion module. The stator and rotor are disposed in the housing, the rotating shaft is rotatably disposed on the housing, the rotor is disposed on the rotating shaft, the mounting seat is disposed on the housing, and a mounting groove is provided on the mounting seat. A water-cooling channel is formed within the end cover, the end cover is disposed on the mounting seat and covers the mounting groove, the rotating shaft sequentially passes through the mounting seat and the end cover, and the frequency conversion module is located in the mounting groove and is thermally connected to the end cover. This improves the heat dissipation efficiency of the motor, thereby enhancing the operational reliability of the water pump.

Description

Technical Field

[0001] The present invention relates to the technical field of water supply equipment, and in particular to a water-cooled variable-speed motor and an intelligent water pump. Background Art

[0002] Water pumps are widely used in industrial production and domestic water supply. They typically include a motor and a pump body, with a water inlet and outlet. An impeller is installed within the pump body. The motor drives the impeller to rotate within the pump body, drawing water from the water inlet and discharging it from the water outlet. The motor, a key component of the water pump, is typically equipped with a controller and a frequency conversion module. For example, Chinese Patent Publication No. CN104953752A discloses a variable-frequency intelligent motor and water supply system. The motor housing is provided with an electrical installation heat dissipation cavity to house the frequency conversion module, which relies on airflow for heat dissipation. However, in actual use, as motor power increases, the amount of heat dissipated by the frequency conversion module also increases. Airflow heat dissipation cannot meet the heat dissipation requirements of the frequency conversion module, resulting in low heat dissipation efficiency and affecting the normal operation of the motor. Therefore, the technical problem addressed by the present invention is how to design a water pump technology that improves the heat dissipation efficiency of the frequency conversion module. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a water-cooled variable speed motor and an intelligent water pump, so as to improve the heat dissipation efficiency of the frequency conversion module in the motor and thus improve the operational reliability of the water pump.

[0004] The technical solution provided by the present invention is a water-cooled variable speed motor, comprising: a housing, a stator, a rotor, a rotating shaft, a mounting seat, an end cover and a frequency conversion module, wherein the stator and the rotor are arranged in the housing, the rotating shaft is rotatably arranged on the housing, the rotor is arranged on the rotating shaft, the mounting seat is arranged on the housing, a mounting groove is provided on the mounting seat, a water-cooling flow channel is formed inside the end cover, the end cover is arranged on the mounting seat and covers the mounting groove, the rotating shaft passes through the mounting seat and the end cover in sequence, and the frequency conversion module is located in the mounting groove and is thermally conductively connected to the end cover.

[0005] Furthermore, the end cover includes a sealing cover plate and a heat-conducting cover plate, the sealing end cover and the heat-conducting end cover are sealed together, the water-cooling channel is formed between the sealing end cover and the heat-conducting end cover, and the frequency conversion module is arranged on the heat-conducting end cover.

[0006] Furthermore, the sealing cover plate and / or the heat-conducting cover plate are provided with water flow grooves, the water flow grooves form the water-cooling channel between the sealing end cover and the heat-conducting end cover, and the frequency conversion module is provided on the heat-conducting end cover.

[0007] Furthermore, the sealing cover plate is provided with an inlet and an outlet, and the inlet and the outlet are respectively communicated with the water flow groove.

[0008] Furthermore, a buffer groove is provided on the heat-conducting cover plate, and the buffer groove is arranged opposite to the outlet.

[0009] Furthermore, a plurality of protrusion structures are provided in the water flow groove.

[0010] Furthermore, the side wall of the mounting groove is further provided with a ventilation groove, the outer wall of the mounting seat is further provided with an air duct connected to the ventilation groove, and a heat dissipation fan is provided in the ventilation groove.

[0011] The present invention also provides an intelligent water pump, including a pump body, the pump body having a water inlet cavity and a water outlet cavity, and also including the above-mentioned water-cooled variable speed motor, the water inlet cavity and the water outlet cavity are respectively connected to the water cooling flow channel of the water-cooled variable speed motor through connecting pipes.

[0012] Furthermore, a water inlet pipe and a water outlet pipe are provided on the pump body, the water inlet pipe is connected to the water inlet cavity, and the water outlet pipe is connected to the water outlet cavity; a flow detection module is provided in the water inlet pipe or the water outlet pipe, and the flow detection module includes a support frame, a detection pipe and a flow meter, the support frame is provided in the water inlet pipe, the detection pipe is provided on the support frame and suspended in the water inlet pipe, and the sensor of the flow meter is provided in the detection pipe.

[0013] Furthermore, a mounting cavity is formed inside the detection pipe, and a water inlet flow channel and a water outlet flow channel are formed in the detection pipe, and the water inlet flow channel and the water outlet flow channel are respectively connected to the mounting cavity.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are as follows: the water-cooled variable speed motor provided by the present invention installs the frequency conversion module by configuring a mounting base and an end cover on the outer shell, so that the frequency conversion module is located in the mounting groove and is heat-conductingly connected to the end cover, and a water-cooling channel is integrated in the end cover, and the heat dissipation treatment of the frequency conversion module heat-conductingly connected to the end cover is achieved by introducing cold water, and the source of cold water can be supplied by the water driven by the water pump itself or an external cooling water source, so that the water-cooling channel can circulate cold water continuously during the operation of the water pump to efficiently take away the heat generated by the frequency conversion module, thereby improving the heat dissipation efficiency of the motor and improving the operation reliability of the water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is one of the structural diagrams of the intelligent water pump of the present invention;

[0017] Figure 2 for Figure 1 Middle AA section view;

[0018] Figure 3 for Figure 2 A partial enlarged schematic diagram of area B in the middle;

[0019] Figure 4 for Figure 2 A partial enlarged schematic diagram of the middle C area;

[0020] Figure 5 for Figure 1 Exploded diagram of a water-cooled variable speed motor

[0021] Figure 6 for Figure 1 Schematic diagram of the structure of the middle mounting seat;

[0022] Figure 7 for Figure 1 a cross-sectional view of the middle mounting seat;

[0023] Figure 8 for Figure 1 Schematic diagram of the structure of the middle sealing cover;

[0024] Figure 9 for Figure 1 Schematic diagram of the structure of the middle heat-conducting cover;

[0025] Figure 10 This is the second structural diagram of the intelligent water pump of the present invention;

[0026] Figure 11 for Figure 10 One of the cross-sectional views of the flow detection module;

[0027] Figure 12 for Figure 10 The second cross-sectional view of the flow detection module.

[0028] Reference numerals:

[0029] Motor 100, housing 101, rotating shaft 102, mounting base 103, end cover 104, cooling fan 105;

[0030] Installation groove 1031, ventilation groove 1032, air duct 1033, water cooling channel 1040, sealing cover 1041, heat conduction cover 1042, water flow groove 1043, inlet 1044, outlet 1045, protrusion structure 1046,

[0031] Pump body 200, first connecting pipe 201, water valve 202, second connecting pipe 203;

[0032] Controller 300, control panel 301, frequency conversion module 302, junction box 303;

[0033] Flow detection module 400;

[0034] Support frame 1, detection pipeline 2, flow meter 3;

[0035] A first guide plate 21 , a second guide plate 22 , a mounting cavity 23 , a water inlet channel 24 , a water outlet channel 25 , and a sensor 31 . DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] Example 1, as Figures 1-9 As shown, the present invention provides a water-cooled variable speed motor 100 , comprising: a housing 101 , a stator (not shown), a rotor (not shown), a rotating shaft 102 , a mounting base 103 , an end cover 104 and a controller 300 .

[0038] The stator and the rotor are disposed in the housing, the shaft is rotatably disposed on the housing, and the rotor is disposed on the shaft. The structural form and installation method of the stator, rotor, and shaft can be referred to as conventional motors and are not limited or elaborated upon herein. The controller 300 typically includes control components such as a control panel 301 and a frequency conversion module 302. To facilitate cable connection to the motor, the controller 300 is also provided with a junction box 303 on the housing to meet wiring requirements.

[0039] To reliably mount the inverter module and meet heat dissipation requirements during operation, the inverter module is installed via the mounting base and the end cover. Specifically, the mounting base is disposed on the housing and has a mounting groove 1031 formed therein. A water-cooling channel 1040 is formed within the end cover. The end cover is disposed on the mounting base and covers the mounting groove. The rotating shaft sequentially passes through the mounting base and the end cover. The inverter module is located in the mounting groove and is thermally connected to the end cover.

[0040] Specifically, during actual use, after the motor is powered on, the frequency conversion module controls the motor's operating frequency. The frequency conversion module is installed in the mounting groove and covered by the end cap to ensure its installation reliability. Heat generated by the frequency conversion module during operation is transferred to the end cap. The water-cooling channel formed in the end cap continuously supplies cold water, which quickly absorbs the heat generated by the frequency conversion module, thereby meeting the heat dissipation requirements of the frequency conversion module.

[0041] Among them, for the thermal connection method between the frequency conversion module and the end cover, the frequency conversion module can be directly attached to the end cover for direct heat conduction, or a support column can be provided on the end cover, and the frequency conversion module is provided on the support column and forms a certain distance with the end cover to indirectly conduct heat through the air. No limitation or elaboration is made here.

[0042] Furthermore, in order to facilitate the formation of the water-cooling channel in the end cover, the end cover includes a sealing cover plate 1041 and a heat-conducting cover plate 1042. The sealing end cover and the heat-conducting end cover are sealed together, and the water-cooling channel is formed between the sealing end cover and the heat-conducting end cover. The frequency conversion module is arranged on the heat-conducting end cover.

[0043] Specifically, the end cap is assembled by fastening together a sealing cover plate 1041 and a heat-conducting cover plate 1042. The heat-conducting cover plate 1042 can be made of a material with good thermal conductivity, such as copper or aluminum. This allows the inverter module 302, mounted on the heat-conducting end cap, to quickly transfer heat through the heat-conducting end cap. Furthermore, a conventional sealing ring can be used to seal the sealing cover plate 1041 and the heat-conducting cover plate 1042. Specifically, the sealing ring is sandwiched between the sealing cover plate 1041 and the heat-conducting cover plate 1042 to form a closed water-cooling channel. The specific sealing method is not limited herein.

[0044] Furthermore, the sealing cover plate and / or the heat-conducting cover plate are provided with water flow grooves 1043, the water flow grooves form the water-cooling channel between the sealing end cover and the heat-conducting end cover, and the frequency conversion module is provided on the heat-conducting end cover.

[0045] Specifically, by providing water flow grooves 1043 on the sealing cover plate and / or the heat-conducting cover plate, when the sealing cover plate and the heat-conducting cover plate are fastened together, the water flow grooves 1043 form a flow path for cold water. To facilitate the flow of cold water, an inlet 1044 and an outlet 1045 may also be provided on the sealing cover plate, each of which communicates with the water flow grooves.

[0046] Specifically, cold water enters the water-cooling channel through the inlet, absorbs heat conducted by the frequency conversion module and is output from the outlet, thereby achieving continuous flow of cold water into the water-cooling channel to absorb heat.

[0047] Preferably, in order to increase the width of the water-cooling channel so that the cold water can cover a larger heat dissipation area, a plurality of raised structures 1046 can also be provided in the water flow groove. The water flowing into the water flow groove is blocked by the raised structure 1046, which can disperse the water flow more effectively, and is more conducive to improving the uniform dispersion of the cold water in the width direction of the water-cooling channel, thereby improving the heat dissipation efficiency.

[0048] In order to reduce the impact of bubbles contained in the water flow on the heat dissipation efficiency of the end cover, a buffer groove 1047 is provided on the heat-conducting cover plate, and the buffer groove 1047 is arranged opposite to the outlet. Specifically, during use, air contained in the cold water can be collected in the buffer groove 1047 at the top during transportation, and then discharged from the outlet, thereby reducing the impact of bubbles distributed on the heat-conducting cover plate on heat dissipation. Taking the water driven by the water pump itself as an example, the water driven by the water pump flows into the water flow groove through the connecting pipe on the inlet, and the upper end of the connecting pipe in the outlet extends into the buffer groove 1047. Because the nozzle of the connecting pipe in the outlet is higher than the surface of the water flow groove on the heat-conducting cover plate, the water flow groove can be filled with water to improve heat dissipation efficiency; and the bubbles flow into the buffer groove 1047 with the water flow. Once the bubbles enter the buffer groove 1047, they can be discharged from the connecting pipe.

[0049] In addition, for the water flow groove, one end thereof is arranged corresponding to the outlet, and the other end is arranged corresponding to the inlet. In order to achieve uniform water circulation in the water flow groove, an auxiliary water groove 1048 can also be provided on the sealing cover plate or the heat conductive cover plate. The auxiliary water groove 1048 is arranged outside the water flow groove and connects the two ends of the water flow groove. The auxiliary water groove 1048 is narrower in width and shallower in depth than the water flow groove as a whole. For the cold water entering the water flow groove from the inlet, the auxiliary water grooves 1048 connected to the two ends of the water flow groove can assist the water flow to flow between the two ends, thereby making the water circulation in the water flow groove more uniform.

[0050] Furthermore, in order to cooperate with the water cooling method and further optimize the heat dissipation efficiency of the frequency conversion module, the side wall of the installation groove is also provided with a ventilation groove 1032, and the outer wall of the mounting seat is also provided with an air duct 1033 connected to the ventilation groove, and a heat dissipation fan 105 is provided in the ventilation groove.

[0051] Specifically, for the frequency conversion module, one surface thereof is in contact with the heat-conducting cover plate, while the other surface can further assist in heat dissipation through airflow. After the heat dissipation fan is started, the hot air in the mounting groove 1031 can circulate with the external environment through the air duct 1033, thereby allowing the mounting groove 1031 to continuously enter the external air for heat dissipation. Specifically, two relatively arranged ventilation slots 1032 can be configured on the mounting base to install the heat dissipation fan, one of the heat dissipation fans is used to draw external air into the mounting groove, and the other heat dissipation fan is used to discharge the hot air in the mounting groove to speed up the heat dissipation efficiency.

[0052] Example 2, as Figures 1-9 As shown, based on the above-mentioned embodiment 1, the present invention also provides an intelligent water pump, including a pump body 200, the pump body having a water inlet cavity (unmarked) and a water outlet cavity (unmarked), and also including the water-cooled variable speed motor 100 of embodiment 1, the water inlet cavity is connected to the water-cooling flow channel 1040 of the water-cooled variable speed motor 100 through a first connecting pipe 201, and the water outlet cavity is connected to the water-cooling flow channel 1040 of the water-cooled variable speed motor 100 through a second connecting pipe 203.

[0053] Specifically, during the operation of the intelligent water pump, the motor 100 starts to drive the impeller in the pump body to rotate, thereby driving the water inlet cavity to draw water in and discharge water from the water outlet cavity. During this process, the water pressure in the water outlet cavity is relatively high, and the cold water in the water outlet cavity can be partially transported to the water cooling channel via the first connecting pipe 201 to absorb the heat generated by the frequency conversion module. The water after absorbing the heat is then transported to the water inlet cavity via the second connecting pipe 203, thereby completing the circulation of the cooling water. In this way, the circulation of cold water can be achieved by utilizing the water pressure difference between the water inlet cavity and the water outlet cavity of the water pump itself without the need for additional cold water circulation equipment.

[0054] To facilitate automatic control of the flow of cold water, a water valve 202 may be provided on one of the connecting pipes. For example, the water valve 202 provided on the first connecting pipe 201 may control the amount of water flowing through the first connecting pipe 201. The water valve 202 may be a manual valve or an electrically controlled valve.

[0055] Taking the use of an electrically controlled valve as an example, a temperature sensor (not shown) can be installed in the mounting groove. The water valve 202 and the temperature sensor are electrically connected to the controller 300. During water pump operation, when the temperature value detected by the temperature sensor exceeds the upper temperature limit, the controller 300 controls the water valve 202 to open wider, increasing the flow of cold water in the first connecting pipe 201 and thereby accelerating the cooling rate. When the temperature value detected by the temperature sensor falls below the lower temperature limit, the controller 300 controls the water valve 202 to open narrower.

[0056] Furthermore, the water-cooled variable-speed motor of this embodiment is integrated with a flow detection module 400 in the pump body 200, and the flow detection module includes a support frame 1, a detection pipe 2 and a flow meter 3. The support frame is arranged in the pump body, and the detection pipe is arranged on the support frame and suspended in the pump body. The sensor 31 of the flow meter is arranged in the detection pipe and is electrically connected to the controller.

[0057] Specifically, the pump body is provided with an inlet pipe (unmarked) and a water outlet pipe (unmarked), the inlet pipe is connected to the water inlet cavity, and the outlet pipe is connected to the water outlet cavity; a flow detection module is provided in the inlet pipe or the outlet pipe, the detection pipe 2 in the flow detection module 400 is provided in the pump body 200, and the sensor 31 of the flow meter 3 in the flow detection module 400 is arranged in the detection pipe 2.

[0058] For the detection pipeline 2, the detection pipeline 2 has a straight pipe structure as a whole, and the ratio of the flow path length to the flow path diameter of the detection pipeline 2 meets the straight pipe section length requirement required by the national standard, that is, the length of the detection pipeline 2 is not less than 5 times the diameter of the water flow channel in the detection pipeline 2.

[0059] During actual use, a rotatable impeller (not shown) is provided in the pump body, and the motor is used to drive the impeller to rotate so that water flows into the pump body 200. The water in the pump body 200 also flows into the detection pipe 2. The water flowing through the detection pipe 2 passes through the sensor 31 and then the flow rate is detected by the flow meter 3.

[0060] Since the flow path length and flow path diameter ratio of the detection pipe 2 meet the straight pipe section length required by national standards, the water flow velocity in the detection pipe 2 is evenly distributed, thereby improving the detection accuracy of the sensor 31.

[0061] In addition, the detection pipe 2 is relatively short in length, thereby meeting the installation requirements of the flow meter 3. In this way, the detection pipe 2 can be directly integrated into the pump body 200 without the need for additional pipes outside the pump body 200 to form a straight pipe section.

[0062] The pump body 200 also features a cable routing hole (not labeled) through which the cable connected to the sensor is sealed and electrically connected to the controller. The cable routing hole on the pump body 200 is equipped with a sealing member, such as a sealing ring, to seal the cable passing through the hole. The cable connected to the sensor extends from the pump body 200 to facilitate electrical connection to the controller.

[0063] Further, such as Figure 11 As shown, a first guide plate 21 is further provided in the detection pipe 2 . The first guide plate 21 extends along the axis of the detection pipe 2 and is arranged on the water inlet side of the sensor 31 .

[0064] Specifically, by configuring a first guide plate 21 in the detection pipe 2, the first guide plate 21 can better guide the water flow into the detection pipe 2. The first guide plate is arranged along the axial direction of the detection pipe 2, so that the water flow in the detection pipe 2 can flow more quickly and smoothly, thereby better balancing the water flow rate in the detection pipe 2. Furthermore, a second guide plate 22 is also provided in the detection pipe 2. The second guide plate 22 extends along the axis of the detection pipe 2 and is arranged on the water outlet side of the sensor 31. Specifically, the second guide plate 22 is also configured on the water outlet side of the sensor 31 in the detection pipe 2 to guide the water flow in the detection pipe 2 to be smoothly discharged, thereby more effectively ensuring that the water flow rate in the detection pipe 2 is uniform.

[0065] Similarly, if Figure 12 As shown, a mounting cavity 23 is formed inside the detection pipe 2 , and a water inlet channel 24 and a water outlet channel 25 are formed in the detection pipe 2 , and the water inlet channel 24 and the water outlet channel 25 are respectively connected to the mounting cavity 23 .

[0066] Specifically, in order to more effectively reduce the overall length of the detection pipeline 2 and meet the installation requirements of the sensor 31, an installation cavity 23 can be formed in the middle part of the inspection pipeline to install the sensor 31, and an inlet channel 24 and an outlet channel 25 with a smaller diameter than the installation cavity 23 are provided on both sides of the installation cavity 23. The inlet channel 24 and the outlet channel 25 are used to meet the requirements of the straight pipe section length during flow meter 3 detection. At the same time, since the diameters of the inlet channel 24 and the outlet channel 25 are smaller, the overall length of the detection pipeline 2 can be more effectively shortened.

[0067] Furthermore, along the water flow direction in the pump body 200 , the outer dimensions of the detection pipe 2 gradually increase from the water inlet channel 24 to the installation cavity 23 , and gradually decrease from the installation cavity 23 to the water outlet channel 25 .

[0068] Specifically, since the detection pipe 2 is suspended in the pump body 200 through the support frame 1, in order to reduce the large water resistance caused by the detection pipe 2 to the water flow in the pump body 200, the water inlet end and the water outlet end of the detection pipe 2 are both set to a conical structure to play a role in guiding the water flow, thereby reducing the water resistance caused to the water flow.

[0069] In some embodiments, in order to facilitate the connection of the sensor 31, a wiring channel (not marked) is provided in the support frame 1, and the cable between the controller and the sensor 31 is arranged in the wiring channel.

[0070] The flow meter sensor is installed by configuring a detection pipe. The detection pipe is shorter and has a smaller diameter. In this way, the diameter-to-length ratio required by the flow meter sensor to meet measurement accuracy can be met. The water flow velocity in the detection pipe can be evenly distributed at the position of the flow channel sensor to ensure accurate measurement of the flow meter sensor. As for the detection pipe, its size is smaller than the inlet and outlet of the water pump, which can reduce the space occupied by the overall installation of the water pump, thereby reducing the length of the straight pipe section required for installing the flow meter, thereby reducing the space required for installing the water pump.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A water-cooled variable speed motor, characterized in that: include: A housing, a stator, a rotor, a rotating shaft, a mounting seat, an end cover, and a frequency conversion module, wherein the stator and the rotor are arranged in the housing, the rotating shaft is rotatably arranged on the housing, the rotor is arranged on the rotating shaft, the mounting seat is arranged on the housing, a mounting groove is provided on the mounting seat, a water-cooling flow channel is formed inside the end cover, the end cover is arranged on the mounting seat and covers the mounting groove, the rotating shaft passes through the mounting seat and the end cover in sequence, the frequency conversion module is located in the mounting groove and is thermally connected to the end cover; The end cover includes a sealing cover plate and a heat-conducting cover plate, the sealing cover plate and the heat-conducting cover plate are sealed together, the water-cooling channel is formed between the sealing cover plate and the heat-conducting cover plate, and the frequency conversion module is arranged on the heat-conducting cover plate; The sealing cover plate and / or the heat-conducting cover plate are provided with water flow grooves, the water flow grooves forming the water-cooling channel between the sealing cover plate and the heat-conducting cover plate, and the frequency conversion module is provided on the heat-conducting cover plate; The sealing cover plate is provided with an inlet and an outlet, and the inlet and the outlet are respectively communicated with the water flow groove; A buffer groove is provided on the heat-conducting cover plate, and the buffer groove is arranged opposite to the outlet; The buffer groove is configured so that water flows into the water flow groove through a connecting pipe on the inlet, the upper end of the connecting pipe in the outlet extends into the buffer groove, and the pipe mouth of the connecting pipe in the outlet is higher than the surface of the water flow groove on the heat conductive cover plate.

2. The water-cooled variable speed motor according to claim 1, characterized in that: A plurality of protrusion structures are arranged in the water flow groove.

3. The water-cooled variable speed motor according to claim 1, characterized in that: The side wall of the mounting groove is further provided with a ventilation slot, the outer wall of the mounting seat is further provided with an air duct connected to the ventilation slot, and a heat dissipation fan is provided in the ventilation slot.

4. An intelligent water pump, comprising a pump body, wherein the pump body has a water inlet cavity and a water outlet cavity, characterized in that: It also includes the water-cooled variable speed motor according to any one of claims 1 to 3, wherein the water inlet cavity and the water outlet cavity are respectively connected to the water cooling channel of the water-cooled variable speed motor through connecting pipes.

5. The intelligent water pump according to claim 4, characterized in that: The pump body is provided with a water inlet pipe and a water outlet pipe, the water inlet pipe is connected to the water inlet cavity, and the water outlet pipe is connected to the water outlet cavity; a flow detection module is provided in the water inlet pipe or the water outlet pipe, and the flow detection module includes a support frame, a detection pipe and a flow meter, the support frame is provided in the water inlet pipe, the detection pipe is provided on the support frame and suspended in the water inlet pipe, and the sensor of the flow meter is provided in the detection pipe.

6. The intelligent water pump according to claim 5, characterized in that: An installation cavity is formed inside the detection pipe, and a water inlet flow channel and a water outlet flow channel are formed in the detection pipe. The water inlet flow channel and the water outlet flow channel are respectively connected to the installation cavity.

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