CN113784574A - Water pump electric integrated water self-cooling system - Google Patents
Water pump electric integrated water self-cooling system Download PDFInfo
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- CN113784574A CN113784574A CN202110762406.3A CN202110762406A CN113784574A CN 113784574 A CN113784574 A CN 113784574A CN 202110762406 A CN202110762406 A CN 202110762406A CN 113784574 A CN113784574 A CN 113784574A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20272—Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds
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Abstract
The invention relates to an electric integrated water self-cooling system of a water pump. The alternating current motor is connected with the water pump, and the alternating current motor can drive the impeller of the water pump to rotate when working so as to drive the water pump to pump water from a lower position to a higher position. The frequency converter is electrically connected with the alternating current motor and used for adjusting the rotating speed of the alternating current motor. Still be equipped with heat radiation structure in the converter, heat radiation structure one end is passed through the heat dissipation oral siphon and is linked to each other with the bypass of water pump delivery port, and the other end links to each other with the water inlet of water pump through the heat dissipation wet return. By utilizing the pressure difference between the water outlet and the water inlet of the water pump, water at the water outlet of the water pump enters the heat dissipation structure of the frequency converter through the heat dissipation water inlet pipe and then flows back to the water inlet of the water pump through the heat dissipation water return pipe. Water cools off the converter at the heat radiation structure inner loop, need not additionally to increase radiator unit, only utilizes the pressure differential drive rivers of water pump access & exit, just can reach the radiating effect that the converter needs, the volume of the converter that has significantly reduced to the cost is reduced.
Description
Technical Field
The invention relates to the technical field of frequency converter heat dissipation, in particular to a water pump and electric integrated water self-cooling system.
Background
At present, the water supply of buildings mostly adopts variable-frequency constant-pressure water supply, a water pump is directly connected with a tap water pipe network or an underground well pipeline, and the rotating speed of a motor of the water pump is controlled through a frequency converter, so that constant water pressure is kept for performing stable-pressure water supply, and secondary pressure transformation of water supply is realized on the basis of the original pressure of the tap water pipe network. However, the frequency converter of the water pump generates certain heat during working, and heat needs to be dissipated timely, so that the normal work of the frequency converter is ensured.
The heat dissipation of the frequency converter adopts wind cooling heat dissipation, heat pipe heat dissipation, water cooling heat dissipation and other modes. Compared with other two modes, the water-cooling heat dissipation uses a better heat conduction technology, so that the size of the heat radiator of the frequency converter is greatly reduced, the heat dissipation efficiency is higher, and the performance is better. However, at present, a set of water circulation equipment needs to be additionally arranged in the water pump for water cooling, namely, a set of water circulation control system needs to be additionally arranged to meet the requirement of heat dissipation, so that the frequency converter equipment has the problems of large size, inconvenience in installation and high cost.
Disclosure of Invention
Technical problem to be solved
In view of the defects and shortcomings of the prior art, the invention provides an electric and water integrated water self-cooling system for a water pump, which solves the problems that in the prior art, additional water circulation equipment is required to be arranged to dissipate heat of a frequency converter, so that the frequency converter is large in size and high in cost.
(II) technical scheme
In order to achieve the purpose, the invention provides an electric integrated water self-cooling system of a water pump, which has the following specific technical scheme:
an electric integrative water self-cooling system of water pump includes:
a water pump;
the alternating current motor is connected with the water pump, and the alternating current motor can drive the water pump impeller to rotate when working;
the frequency converter is electrically connected with the alternating current motor and used for adjusting the rotating speed of the alternating current motor;
still be equipped with heat radiation structure in the converter, heat radiation structure one end is passed through the heat dissipation oral siphon and is linked to each other with the bypass of water pump delivery port, and the other end links to each other with the water inlet of water pump through the heat dissipation wet return.
Further, the frequency converter further comprises:
an electric module electrically connected to the AC motor;
the electric module is arranged on the upper end face of the substrate, and the heat dissipation structure is arranged on the lower end face of the substrate;
the casing, electric module, base plate and heat radiation structure all locate in the casing.
Further, the heat dissipation structure is a water cooling plate, and the heat dissipation water inlet pipe and the heat dissipation water return pipe are connected to two sides of the water cooling plate.
Further, a heat conducting grease is coated between the water cooling plate and the base plate.
Further, a water inlet pipeline is arranged at the water inlet of the water pump, and a water outlet pipeline is arranged at the water outlet of the water pump;
the heat dissipation water inlet pipe is connected to the side wall of the water outlet pipeline, and the heat dissipation water outlet pipe is connected to the water inlet pipeline.
Furthermore, the heat dissipation inlet pipe is obliquely arranged towards the outlet end of the water outlet pipeline.
Furthermore, a filter screen is arranged at the connecting side of the heat dissipation water inlet pipe and the water outlet pipeline.
Further, the electrical module comprises a controller, a rectifier, a filter and an inverter;
the input end of the rectifier is electrically connected with the alternating current power supply, the output end of the rectifier is electrically connected with the input end of the filter, the output end of the filter is electrically connected with the input end of the inverter, and the output end of the inverter is electrically connected with the alternating current motor;
the controller is electrically connected with the inverter and is used for regulating the output voltage of the inverter.
Further, a pressure sensor is also arranged on the water outlet pipeline;
the pressure sensor is in communication connection with the controller and used for detecting outlet pressure of the water pump and transmitting outlet pressure information to the controller, and the controller adjusts output voltage of the inverter according to the outlet pressure information.
Further, the pressure sensor is arranged close to the water outlet.
(III) advantageous effects
The water pump and electric integrated water self-cooling system effectively solves the defects of the prior art.
According to the invention, on the basis of an original water supply system, the heat dissipation water inlet pipe and the heat dissipation water outlet pipe are arranged on two sides of the heat dissipation structure of the frequency converter, the heat dissipation water inlet pipe is connected with the water outlet of the water pump, and the heat dissipation water outlet pipe is connected with the water inlet of the water pump. The pressure difference between the water outlet and the water inlet of the water pump is utilized to drive water flow, the water flow in the water outlet pipeline flows into the heat dissipation structure through the heat dissipation water inlet pipe, circulates in the heat dissipation structure, then flows back to the water inlet of the water pump through the heat dissipation water outlet pipe, and takes away the heat of the frequency converter through the water flow to dissipate heat of the frequency converter. Compared with the traditional frequency converter cooling mode with the additional heat dissipation equipment, the water pump electrical integration self-cooling system provided by the invention can achieve the heat dissipation effect required by the frequency converter by only utilizing the pressure difference at the inlet and the outlet of the water pump to drive water flow without additionally adding the heat dissipation equipment, thereby greatly reducing the volume of the frequency converter and reducing the cost.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application, and in which:
FIG. 1 is a schematic structural diagram of an electric-integrated water self-cooling system of a water pump in an embodiment;
FIG. 2 is a schematic diagram of a frequency converter according to an embodiment;
fig. 3 is a schematic structural diagram of an electrical module of a frequency converter in an embodiment.
[ description of reference ]
1. A water pump; 2. an alternating current motor;
3. a frequency converter; 310. a heat dissipation structure; 320. a housing; 330. a heat conductive grease; 340. a substrate;
350. an electrical module; 351. a rectifier; 352. a filter; 353. an inverter; 354. a controller;
4. a pressure sensor; 5. a water outlet pipeline; 6. a filtration device; 7. a heat dissipation water inlet pipe; 8. a heat radiation water outlet pipe; 9. a water inlet pipeline.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present embodiment, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the scope of the present embodiment.
Referring to fig. 1 to 3, the present embodiment provides a water pump and electric integrated water self-cooling system, which includes a water pump 1, a frequency converter 3, and an ac motor 2. The water outlet of the water pump 1 is provided with a water outlet pipeline 5, the water inlet is arranged on a water inlet pipeline 9, the water inlet pipeline 9 is directly connected to a building tap water pipe network or an underground well pipeline, and the water outlet pipeline 5 is directly connected with a water supply demand port. The power output end of the alternating current motor 2 is connected with the water pump 1, the alternating current motor 2 can drive the impeller of the water pump 1 to rotate when working, and the frequency converter 3 is electrically connected with the alternating current motor 1 and used for controlling the rotating speed of the alternating current motor 2 and further achieving the purpose of controlling the rotating speed of the impeller of the water pump 1. Further, a heat dissipation structure 310 is arranged in the frequency converter 3, a heat dissipation inlet pipe 7 is arranged on one side of the heat dissipation structure 310, a heat dissipation outlet pipe 8 is arranged on the other side of the heat dissipation structure 310, and the heat dissipation inlet pipe 7 and the heat dissipation outlet pipe 8 are made of stainless steel pipes or rubber pipes. Wherein, the heat dissipation inlet pipe 7 is connected to the side wall of the outlet pipe 5, the heat dissipation inlet pipe 7 is disposed to incline toward the outlet direction of the outlet pipe 5 of the water pump 1, the inclination angle of the heat dissipation inlet pipe 7 is related to the flow rate of water in the outlet pipe 5 of the water pump 1 and the heat dissipation requirement of the frequency converter 3 in practical application, as an example, the inclination angle of the heat dissipation inlet pipe 7 in this embodiment is preferably 0 ° to 75 °, so that water in the outlet pipe 5 smoothly flows into the heat dissipation inlet pipe 7.
Further, a filtering device 6 is arranged at the connecting side of the heat dissipation water inlet pipe 7 and the water outlet pipe 5 and used for filtering impurities so as to prevent the impurities from entering the frequency converter 3 to cause blockage. By way of example, in the present embodiment, the filtering device 6 is preferably a filter screen, and is mainly used for filtering out granular impurities to prevent the impurities from blocking the heat dissipation structure 310 and affecting refrigeration.
The heat dissipation principle of the electric integrative water self-cooling system of water pump that this embodiment provided does: by utilizing the water pressure difference between the water inlet and the water outlet of the water pump 1, the water flowing out of the water outlet of the water pump 1 is introduced into the heat dissipation structure 310 through the heat dissipation water inlet pipe 7, so that the water circulates in the heat dissipation structure 310 to take away the heat of the frequency converter 3, and then flows back to the water inlet pipeline 9 of the water pump 1 through the heat dissipation water outlet pipe 8. This embodiment has utilized the water pressure difference formation hydrologic cycle between 1 water inlet of water pump and delivery port on original water supply system's basis, very big enhancement to converter 3 the radiating effect, need not additionally to set up refrigeration plant, and then reduced converter 3's volume, the cost is reduced.
Specifically, referring to fig. 2, the frequency converter 3 includes a housing 320, and an electrical module 350, a substrate 340, and a heat dissipation structure 310 disposed in the housing 320. The electric module 350 is disposed on the upper end surface of the substrate 340 and electrically connected to the ac motor 2, and the heat dissipation structure 310 is disposed on the lower end surface of the substrate 340. The substrate 340 is made of a copper substrate or other good thermal conductor material, the heat conducting grease 330 is coated between the substrate 340 and the heat dissipation structure 310, and the heat conducting grease 330 transfers the heat generated by the electrical module 350 to the heat dissipation structure 310 for heat dissipation through a heat conduction manner. Further, casing 320 of converter 3 in this embodiment is metal casing, is provided with a plurality of round holes on casing 320, and the last correspondence of alternating current motor 2 is provided with the screw hole, and casing 320 passes through bolt detachably and installs on alternating current motor 2's outer wall, and converter 3 passes through the wire to be connected with alternating current motor 2, has reduced the length of wire, the cost is reduced. The ac motor 2 generates a certain amount of heat during continuous operation, and the heat can be transferred to the heat dissipation structure 310 through the housing 320 in a conventional manner for heat dissipation.
Specifically, the heat dissipation structure 310 in this embodiment is a water cooling plate, two sides of the water cooling plate are respectively connected to the heat dissipation inlet pipe 7 and the heat dissipation outlet pipe 8, water flowing out of the water outlet of the water pump 1 enters the water cooling plate through the heat dissipation inlet pipe 7, and the water circulates in the water cooling plate to take away heat generated by the electrical module 350 and the ac motor 2, so as to achieve the purpose of heat dissipation. Specifically, the water-cooling plate comprises two clamping plates and a circulating water pipe clamped between the two clamping plates, the circulating water pipe is spirally arranged, and two ends of the circulating water pipe are respectively connected with a heat dissipation water inlet pipe 7 and a heat dissipation water outlet pipe 8. In order to ensure the heat dissipation effect, the clamping plate and the circulating water pipe are made of alloy materials such as aluminum alloy, the alloy materials have good heat transfer performance, and the heat dissipation effect of the water cooling plate can be further ensured.
Referring to fig. 3, the electrical module 350 in the present embodiment includes a rectifier 351, a filter 352, an inverter 353, and a controller 354. The input end of the rectifier 351 is electrically connected with the external power supply, the output end of the rectifier 351 is electrically connected with the input end of the filter 352, the output end of the filter 352 is electrically connected with the input end of the inverter 353, and the output end of the inverter 353 is electrically connected with the alternating current motor 2. The external power supply is 220V/380V single-phase or three-phase alternating current, and the rectifier 351 adopts a three-phase rectifying uncontrolled bridge composed of six rectifying diodes and used for rectifying the alternating current into direct current. The filter 352 can effectively filter a frequency point of a specific frequency in the power line or frequencies other than the frequency point to obtain a power signal of the specific frequency, or eliminate the power signal of the specific frequency. The inverter 353 is a three-phase inverter 353 composed of six IGBT elements (insulated gate bipolar transistors) for converting direct current into alternating current, and output voltages of different frequencies can be obtained by the inverter 353.
Further, a pressure sensor 4 is arranged on a water outlet pipeline of the water pump 1, the pressure sensor 4 is arranged close to a water outlet of the water pump 1, the pressure sensor 4 is in communication connection with a controller 354, the controller 354 is in communication connection with each IGBT (insulated gate bipolar transistor) tube of the inverter 353, the pressure sensor 354 is used for detecting outlet pressure information of the water pump 1 and transmitting the outlet pressure information to the controller 354, the controller 354 has an information processing function, the received outlet pressure information is converted into PWM (pulse width modulation) signals, the PWM signals are transmitted to the inverter 353, the PWM signals are used for controlling the on-off of each IGBT tube of the inverter 353 so as to adjust the frequency of the output voltage of the inverter 353, the alternating current motor 2 is driven to drive impellers of the water pump 1 to rotate at different rotating speeds, and therefore the water flow of the water outlet pipeline of the water pump 1 is changed, and constant-pressure water supply is achieved.
The electric integrative water self-cooling system of water pump that this embodiment provided, during the specific use, fill water pump 1 and inlet channel 9 with water in advance, control alternating current motor 2 and start, drive water pump 1 impeller rotatory, under the effect of centrifugal force, the water in the impeller runner is got rid of to all around, impresses the spiral case, and the impeller entry forms the vacuum, is inhaled along inlet channel 9 under external atmospheric pressure, and inspiratory water is thrown away again by the impeller and gets into outlet channel 5 through the spiral case. The impeller rotates continuously, water can be continuously absorbed and pressed, and the water can be continuously lifted from a low position to a high position, so that the continuous water supply at the water outlet of the water pump 1 is realized. The frequency converter 3 controls the alternating current motor 2 to drive the water pump 1 to rotate at different rotating speeds, so that the water flow of the water outlet pipeline 5 of the water pump 1 is changed, and constant-pressure water supply is realized. By utilizing the pressure difference between the water outlet and the water inlet of the water pump 1, bypass water is taken from the water outlet pipeline 5 of the water pump 1, the water is introduced into the frequency converter 3 through the heat dissipation water inlet pipe 7 and then flows back to the water inlet of the water pump 1 through the heat dissipation water outlet pipe 8, so that the heat dissipation circulation of water flow from the water outlet of the water pump 1 to the frequency converter 3 to the water inlet of the water pump 1 is completed, and the heat dissipation effect is good.
The following takes building water supply as an example, and specifically explains the heat dissipation effect of the water pump and electric integrated water self-cooling system provided by the embodiment through calculation:
in this embodiment, the power of the water pump 1 is 5KW, the corresponding power of the frequency converter 3 is 5KW, and the normal working efficiency of the frequency converter 3 is preset to be 98%, so that the frequency converter 3 generates 2% of waste thermal power, that is, the heat generating power of the frequency converter 3 is Q1, which is 100W;
the water flowing into the heat dissipation structure of the frequency converter is taken from the water outlet pipeline of the water pump, so that the average volume flow rate of the water in the water outlet pipeline of the water pump is V1(m/h), and V1 is set to be 0.66m3The average volume flow rate of water in the heat dissipation inlet pipe is V2 (m)3H), assuming V2 accounts for 1/100 of V1, V2 is 0.0066m3I.e. the average water flow rate in the heat dissipation structure 310 of the frequency converter 3 is 0.0066m3/h。
For the design of the frequency converter, the size of the frequency converter is set to be 400mm multiplied by 200mm, for a water-cooling plate, alloy materials such as aluminum alloy are selected as materials to facilitate heat transfer, and according to the following theories and formulas of heat transfer:
Q＝ΔT*ρ*V*CP
wherein Q is the heat absorbed by water, Delta T is the temperature rise of water flowing through the frequency converter, and the unit is the temperature, and rho is the density of water, and the unit is Kg/m3V is the volume flow of cooling water in m3Cp is the specific heat capacity of the cooling water and is J/(Kg. DEG C.).
Supposing that the temperature rise delta T of the water in the primary circulation cooling process is 8 ℃, the specific heat capacity Cp of the water is 4174J/kg through table lookup, and the density rho of the water at 20 ℃ is 998.2kg/m3From the above, V is 0.0066m3Calculated as absorbed heat power Q2.20 × 105W, it can be seen that Q is much larger than the heating power Q1, so the heat dissipation effect is very good.
The calculation of the heat dissipation effect is only rough estimation, and the calculation of specific numerical values needs to be carried out according to actual working conditions, but the heat dissipation effect of the water pump and electric integrated water self-cooling system on the frequency converter can be proved to be good.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the inventive concept within the technical scope of the present invention.
Claims (10)
1. The utility model provides an electric integrative water from cooling system of water pump which characterized in that includes:
a water pump (1);
the alternating current motor (2) is connected with the water pump (1), and the alternating current motor (2) can drive the impeller of the water pump (1) to rotate when working;
the frequency converter (3) is electrically connected with the alternating current motor (2) and is used for adjusting the rotating speed of the alternating current motor (2);
still be equipped with heat radiation structure (310) in converter (3), heat radiation structure (310) one end through heat dissipation oral siphon (7) with the bypass of water pump (1) delivery port links to each other, the other end through heat dissipation outlet pipe (8) with the water inlet of water pump (1) links to each other.
2. The water pump electric integrated water self-cooling system according to claim 1, wherein the frequency converter (3) further comprises:
an electrical module (350) electrically connected to the AC motor (2);
the electric module (350) is arranged on the upper end face of the substrate (340), and the heat dissipation structure (310) is arranged on the lower end face of the substrate (340);
a housing (320), the electrical module (350), the substrate (340), and the heat dissipation structure (310) all disposed within the housing (320).
3. The water pump electrical integration water self-cooling system as claimed in claim 2, wherein the heat dissipation structure (310) is a water-cooled plate, and the heat dissipation inlet pipe (7) and the heat dissipation outlet pipe (8) are connected to two sides of the water-cooled plate.
4. The water pump electrical integrated water self cooling system according to claim 3, wherein a thermal grease (330) is coated between the water cooling plate and the base plate (340).
5. The water pump electrical integration water self-cooling system according to claim 1, wherein a water inlet pipe (9) is provided at a water inlet of the water pump (1), and a water outlet pipe (5) is provided at a water outlet;
the heat dissipation water inlet pipe (7) is connected to the side wall of the water outlet pipeline (5), and the heat dissipation water outlet pipe (8) is connected to the water inlet pipeline (9).
6. The water pump electrical integrated water self-cooling system according to claim 5, wherein the heat dissipation inlet pipe (7) is inclined toward the outlet end of the outlet pipe (5).
7. The water pump electrical integration water self-cooling system as claimed in claim 6, wherein a filtering device (6) is arranged at the connection side of the heat dissipation water inlet pipe (7) and the water outlet pipe (5).
8. The water pump electrical integrated water self cooling system according to claim 2, wherein the electrical module (350) includes a controller (354), a rectifier (351), a filter (352), and an inverter (353);
the input end of the rectifier (351) is electrically connected with an alternating current power supply, the output end of the rectifier is electrically connected with the input end of the filter (352), the output end of the filter (352) is electrically connected with the input end of the inverter (353), and the output end of the inverter (353) is electrically connected with the alternating current motor (2);
the controller (354) is electrically connected to the inverter (353) for regulating the output voltage of the inverter (353).
9. The water pump electrical integration water self-cooling system according to claim 8, wherein the outlet pipe (5) is further provided with a pressure sensor (4);
the pressure sensor (4) is in communication connection with the controller (354) and is used for detecting outlet pressure of the water pump (1) and transmitting outlet pressure information to the controller (354), and the controller (354) adjusts output voltage of the inverter (353) according to the outlet pressure information.
10. The water pump electrical integrated water self-cooling system according to claim 9, wherein the pressure sensor (4) is disposed near an outlet of the water pump (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110762406.3A CN113784574A (en) | 2021-07-06 | 2021-07-06 | Water pump electric integrated water self-cooling system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110762406.3A CN113784574A (en) | 2021-07-06 | 2021-07-06 | Water pump electric integrated water self-cooling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115682496A (en) * | 2022-12-22 | 2023-02-03 | 济南汉江光电科技有限公司 | Water cooling system for vacuum motion system |
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2021
- 2021-07-06 CN CN202110762406.3A patent/CN113784574A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115682496A (en) * | 2022-12-22 | 2023-02-03 | 济南汉江光电科技有限公司 | Water cooling system for vacuum motion system |
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