阅读说明：本技术 一种变频器和电机集成装置内外自循环的冷却系统 (Inside and outside self-loopa's cooling system of converter and motor integrated device ) 是由 王保刚 沙玉俊 高君 刘世宏 于 2020-05-21 设计创作，主要内容包括：本发明公开了一种变频器和电机集成装置内外自循环的冷却系统,包括：泵,泵包括入水口和出水口；用以驱动泵的电机和变频器,电机和变频器设置于机壳内；外冷水套,外冷水套包裹机壳的至少一部分,并且外冷水套通过管路与泵流体连通；内冷水道,内冷水道设置于机壳内,且内冷水道与外冷水套通过管路流体连通。本发明的冷却系统不仅能对集成了变频器和电机的泵组件进行水冷降温,还附带具有降低噪音的功能。(The invention discloses a self-circulating cooling system inside and outside a frequency converter and motor integrated device, which comprises: a pump comprising a water inlet and a water outlet; the motor and the frequency converter are used for driving the pump and arranged in the shell; an outer cold water jacket, the outer cold water jacket wrapping at least a portion of the housing and in fluid communication with the pump via a pipeline; and the inner cooling water channel is arranged in the machine shell and is in fluid communication with the outer cooling water jacket through a pipeline. The cooling system not only can carry out water cooling on the pump assembly integrating the frequency converter and the motor, but also has the function of reducing noise.)

1. The utility model provides a self-loopa cooling system inside and outside converter and motor integrated device which characterized in that includes:

a pump comprising a water inlet and a water outlet;

the motor and the frequency converter are used for driving the pump and arranged in the shell;

an outer cold water jacket surrounding at least a portion of the enclosure and in fluid communication with the pump via a conduit;

and the inner cooling water channel is arranged in the shell and is in fluid communication with the outer cooling water jacket through a pipeline.

2. The self-circulating cooling system inside and outside the frequency converter and motor integrated device as claimed in claim 1, wherein the water inlet pipeline of the outer cold water jacket is communicated with the water outlet of the pump, and the water outlet pipeline of the outer cold water jacket is communicated with the water inlet of the pump.

3. The self-circulating cooling system inside and outside the frequency converter and motor integrated device as claimed in claim 2, wherein a flow meter is provided on the water inlet pipeline, and a pressure sensor and a regulating valve are provided on the water outlet pipeline.

4. The self-circulating cooling system inside and outside the frequency converter and motor integrated device as claimed in claim 3, wherein a temperature sensor is further disposed on the water outlet pipeline, the adjusting valve is an electrically controlled adjusting valve, the temperature sensor detects the temperature inside the casing, and the adjusting valve adjusts the flow according to the signal of the temperature sensor.

5. The self-circulating cooling system inside and outside the frequency converter and motor integrated device as claimed in claim 3, wherein the regulating valve is a thermo-sensitive regulating valve, and a thermo-sensitive element of the thermo-sensitive regulating valve regulates the flow according to the change of water temperature.

6. The self-circulating cooling system inside and outside the frequency converter and motor integrated device as claimed in claim 3, wherein the cooling system further comprises a cloud data acquisition module, the cloud data acquisition module acquires data of the flow meter, the pressure sensor and the regulating valve and remotely controls the size of the regulating valve.

7. The self-circulating cooling system inside and outside the frequency converter and motor integrated device as claimed in claim 4, wherein:

the temperature sensor is arranged on the outer surface of the shell; alternatively, the first and second electrodes may be,

the temperature sensor is arranged in the shell and is positioned between the frequency converter and the motor.

8. The self-circulating cooling system inside and outside the frequency converter and motor integrated device as claimed in claim 1,

the outer cold water jacket wraps the part of the shell corresponding to the frequency converter;

the frequency converter comprises an end cover, and a vent is arranged on the end cover.

9. The self-circulating cooling system inside and outside the integrated inverter and motor device according to claim 1, wherein the internal cooling water channel is provided at the inverter.

10. The self-circulating cooling system inside and outside the integrated inverter and motor device according to claim 9, wherein the internal cooling water channel is a tubular heat exchange element surrounding the heat generating element inside the inverter.

Technical Field

The invention relates to a water cooling system, in particular to an internal and external self-circulation cooling system of a frequency converter and motor integrated device.

Background

In a building water supply heating and ventilation system, a motor for driving a pump and a frequency converter can be installed together so as to save space, but because of the self heat productivity of the frequency converter and the motor, a corresponding cooling fan needs to be installed for cooling in the operation of a pump unit.

The heat dissipation and ventilation in the design process are a crucial link, and because the power of the equipment can generate a large amount of heat when working under normal conditions, how to dissipate the large amount of heat to ensure the normal work of the equipment, the heat dissipation and ventilation scheme is optimized, reasonable design and calculation are carried out, the efficient heat dissipation of the equipment is realized, and the reliability of the equipment is very important to improve.

The cooling process of the frequency converter is also the heat solving process, heat is led out to the radiator from the inside of the power device and then is transferred to the outside through the fan from the radiator to the air duct, namely, the distribution room, if the distribution room of a large-scale system does not adopt corresponding cooling measures, once the requirement of the frequency converter is exceeded, the environmental temperature exceeds 40 ℃, the capacity reduction is carried out by 55 ℃, and the frequency converter is a heating body. After a long time, the temperature absorbed by the fan of the frequency converter is gradually increased, the heat of the power element cannot be taken away in time, circulation between hot air is caused, and after a certain temperature is reached, an over-temperature fault can be reported, normal use is influenced, and the service life of the power element is shortened.

Referring to fig. 1, in the prior art, many water pumps 1 are driven by a motor 4, and in order to adjust the operating power of the water pump 1, an inverter 6 is generally provided to the motor 4. As shown in figure 1, the water pump is provided with a water inlet and a water outlet, the motor is arranged above the water pump, and a ventilation plate is further arranged at the joint between the motor and the water pump. An inverter 6 is mounted above the motor 4, and a fan 18 is mounted between the inverter 6 and the motor 4 in consideration of heat generated by both the inverter 6 and the motor 4 during operation.

However, the increase in the electric fan means that the overall size of the device is also increased, and in particular the fan will cause severe noise, which affects the quietness of the building.

Disclosure of Invention

In view of the above problems in the prior art, the present invention provides a self-circulating cooling system inside and outside an integrated device of a frequency converter and a motor.

In order to achieve the purpose, the invention adopts the following technical scheme:

a self-circulating cooling system inside and outside a frequency converter and motor integrated device comprises: a pump comprising a water inlet and a water outlet; the motor and the frequency converter are used for driving the pump and arranged in the shell; an outer cold water jacket, the outer cold water jacket wrapping at least a portion of the housing and in fluid communication with the pump via a pipeline; and the inner cooling water channel is arranged in the machine shell and is in fluid communication with the outer cooling water jacket through a pipeline.

Furthermore, the water inlet pipeline of the outer cold water jacket is communicated with the water outlet of the pump, and the water outlet pipeline of the outer cold water jacket is communicated with the water inlet of the pump.

Furthermore, a flowmeter is arranged on the water inlet pipeline, and a pressure sensor and an adjusting valve are arranged on the water outlet pipeline.

Furthermore, a temperature sensor is further arranged on the water outlet pipeline, the adjusting valve is an electric control adjusting valve, the temperature sensor detects the temperature in the casing, and the adjusting valve adjusts the flow according to signals of the temperature sensor.

Furthermore, the regulating valve is a thermosensitive regulating valve, and a thermosensitive element of the thermosensitive regulating valve changes and regulates the flow according to the water temperature.

Furthermore, the cooling system further comprises a cloud data acquisition module, the cloud data acquisition module acquires data of the flow meter, the pressure sensor and the regulating valve, and the size of the regulating valve is controlled remotely.

Further, the temperature sensor is arranged on the outer surface of the shell; or the temperature sensor is arranged in the shell and positioned between the frequency converter and the motor.

Further, the outer cold water jacket wraps the part of the shell corresponding to the frequency converter.

Further, the inner cooling water channel is arranged at the frequency converter.

Furthermore, the inner cooling water channel is a tubular heat exchange element which is surrounded at the heating element inside the frequency converter.

Further, the frequency converter comprises an end cover, and a vent is arranged on the end cover.

In the technical scheme, the cooling system not only can carry out water cooling on the pump assembly integrated with the frequency converter and the motor, but also has the function of reducing noise.

Drawings

FIG. 1 is a schematic diagram of a prior art water pump with a frequency converter and motor;

FIG. 2 is a schematic diagram of the cooling system of the present invention;

FIG. 3 is a schematic diagram of an electrically controlled regulator valve;

FIG. 4 is a schematic diagram of a thermally responsive regulator valve;

fig. 5 is a schematic structural diagram of a frequency converter end cover panel.

Detailed Description

The technical scheme of the invention is further explained by combining the drawings and the embodiment.

The invention discloses a frequency converter and motor integrated device internal and external self-circulation cooling system, which is particularly applied to a building water supply heating ventilation system. In a building environment, the traditional method of cooling by using a fan brings a large volume and strong noise, so that the traditional method is not an optimal choice when applied to the building environment.

In view of the above, referring to fig. 2, the cooling system of the present invention mainly includes a pump 1, a casing 5, a frequency converter 6, a motor 4, an outer cooling water jacket 3, an inner cooling water channel 14 and corresponding pipelines. The pump 1 of the present invention may be of any form having at least one water inlet 7 and at least one water outlet 2. Both the frequency converter 6 and the motor 4 are installed in the casing 5, the motor 4 is used for driving the pump 1 to operate, and the frequency converter 6 is used for adjusting the rotating speed of the motor 4, so that the output of the pump 1 is indirectly adjusted. The outer cold water jacket 3 is wrapped outside the machine shell 5, the inner cold water channel 14 is arranged in the machine shell 5, the outer cold water jacket 3 is in fluid communication with the pump 1 through a pipeline, and the inner cold water channel 14 is in fluid communication with the outer cold water jacket 3 through a pipeline. As can be seen from fig. 2, the pump 1, the outer cooling jacket 3, the inner cooling water channel 14 and their interconnecting lines form a water circulation loop, and in this system the outer cooling jacket 3+ the inner cooling water channel 14 form the core cooling system.

In a preferred embodiment of the present invention, the outer cold water jacket 3 may entirely cover the housing 5, or may cover only a part of the housing 5. As shown in fig. 2, the outer cooling jacket 3 only covers the portion of the housing 5 corresponding to the frequency converter 6, and this covering method focuses on cooling the frequency converter 6. It will be understood by those skilled in the art that the outer cooling water jacket 3, whether it be a full wrap or a partial wrap, is within the scope of the present invention.

In a preferred embodiment of the present invention, the water inlet pipeline of the outer cold water jacket 3 is communicated with the water outlet 2 of the pump 1, and the water outlet pipeline of the outer cold water jacket 3 is communicated with the water inlet 7 of the pump 1. The water inlet pipeline of the outer cold water jacket 3, namely the inlet of cooling water, is connected with the water outlet 2 of the pump 1, and the working pressure head and the flow of the pump 1 are utilized to supply cooling water to a cooling system (namely the outer cold water jacket 3+ the inner cold water channel 14). After passing through the outer cold water jacket 3 and the inner cold water channel 14, the cooling water exchanges heat with the casing 5 containing the motor 4 and the frequency converter 6 integrated machine, and the heat of the cooling water flows out of the cooling system through the cooling water and enters the water inlet 7 of the pump 1. This heat can be utilized by the water of the pump 1 system for micro-heating the working medium water. Rather than being discharged by the fan into the space around the pump 1 unit.

As a preferred embodiment of the present invention, when the pump 1 is applied to a building water supply heating and ventilation system, the water supplied by the pump 1 is used for heating, so that the cooling system of the present invention first uses the water to cool the frequency converter 6 and the motor 4, thereby also increasing the temperature of the water heated in the subsequent zone, and thus saving the energy consumption of the subsequent heating.

As a preferred embodiment of the invention, as shown in fig. 2, the internal cooling water channel 14 is arranged at the frequency converter 6. Since the frequency converter 6 is a high-heat-generating unit, the present embodiment provides the internal cooling water channel 14 at the frequency converter 6. Preferably, the inner cooling water channel 14 is a tubular heat exchange element, which surrounds the heat generating elements inside the frequency converter 6. The invention configures the inner cooling water channel 14 as a tubular heat exchange element such as a coil or an annular flow channel, so that the heat of the heating element of the frequency converter 6 can be discharged inside the frequency converter 6, and the structure also contributes to the improvement of the cooling capacity and the compact structure of the outer cooling water jacket 3 of the casing 5. Meanwhile, because the inner cooling water channel 14 surrounds the heating element inside the frequency converter 6, the structure also has certain sound insulation and noise reduction effects on the frequency converter 6 of the motor 4, and the environment is protected.

It should be understood by those skilled in the art that the arrangement of the internal cooling water channel 14 at the frequency converter 6 is only one of many embodiments of the present invention, and in other embodiments, the internal cooling water channel 14 may be arranged at the motor 4, or between the motor 4 and the frequency converter 6, or even the internal cooling water channel 14 at the motor 4 and the frequency converter 6, respectively, all fall within the scope of the present invention.

In an important embodiment of the present invention, a flow meter 11 is provided on the water inlet line of the outer cooling water jacket 3, and a pressure sensor 12 and a regulating valve 16 are provided on the water outlet line.

The regulating valve 16 of the present invention can have at least two options, namely an electrically controlled regulating valve 10 and a thermally sensitive regulating valve 9, wherein the electrically controlled regulating valve 10 works together with the temperature sensor 8. It will be understood by those skilled in the art that the electronically controlled regulating valve 10 and the thermally sensitive regulating valve 9 are only two of many alternatives of the present invention, and any other valve of the same principle and effect can be equally applied to the cooling system of the present invention.

As shown in fig. 3, when the regulating valve 16 is an electrically controlled regulating valve 10, a temperature sensor 8 is further disposed on the water outlet pipeline, the temperature sensor 8 detects the temperature in the casing 5, and the electrically controlled regulating valve 10 regulates the flow according to a signal of the temperature sensor 8. In the present embodiment, the position of the temperature sensor 8 can be flexible, and it can be disposed on the outer surface of the housing 5, or can be disposed inside the housing 5 between the frequency converter 6 and the motor 4. In particular, in order to enable an efficient and necessary cooling water circulation, the temperature sensor 8 of the electrically controlled regulating valve 10 may be mounted on the outer surface of the casing 5 or in between the frequency converter 6 and the motor 4, in order to measure the temperature of the casing of the frequency converter 6 of the motor 4 and/or the temperature of the interior of the frequency converter 6. As the temperature of the frequency converter 6 and the housing 5 of the motor 4 increases, the electronically controlled regulating valve 10 may increase the opening of the valve 101 to allow more cooling water to enter the cooling system, and as the temperature of the frequency converter 6 and the housing 5 of the motor 4 decreases, the valve opening may decrease accordingly.

As shown in fig. 4, when the regulating valve 16 is the thermo-sensitive regulating valve 9, the thermo-sensitive element 91 of the thermo-sensitive regulating valve 9 regulates the flow rate according to the change of the water temperature. In this embodiment, the thermo-sensitive regulating valve 9 does not need to be additionally provided with a temperature sensor, and when the temperature of the cooling water changes, the thermo-sensitive element changes the corresponding position to change the opening degree of the valve. For example, when the cooling water temperature increases, the valve opening degree increases accordingly, and when the cooling water temperature decreases, the valve opening degree decreases accordingly.

With continued reference to fig. 2, as an optional embodiment of the present invention, the cooling system of the present invention further includes a cloud data acquisition module 13, so that the cooling system has a function of remote online monitoring and control. The cloud data collection module 13 can selectively collect data of the flow meter 11, the pressure sensor 12 and the regulating valve 16, and thereby remotely control the size of the regulating valve.

In this embodiment, the signals of the flowmeter 11, the temperature sensor 8 and the pressure sensor 12 can be collected through the gateway, and then are wirelessly transmitted to the cloud data acquisition module 13 for the user to perform operation monitoring, perform remote valve control adjustment through the remote valve controller 17, and perform early warning on the faults of the frequency converter 6, the motor 4, the pump 1, the water pipeline and the valve. Meanwhile, the cloud data acquisition module 13 can also perform various data analyses on the devices, and index parameter display, spare part replacement and the like are performed.

As an alternative embodiment of the invention, the frequency converter 6 further comprises a top end cap 15 arranged at its side, as shown in fig. 5. The side surface of the frequency converter 6 is provided with an end cover 15 protruding obliquely, and the end cover 15 is provided with a vent. In this embodiment, the end cover 15 has a plurality of ventilation openings for exchanging heat between the internal heat of the inverter 6 and the external air by natural air cooling.

As an embodiment of the invention, the cooling system of the invention can also be simplified for the motor 4 and the frequency converter 6 with stable operation of the pump 1 unit, and temperature sensors and regulating valves are omitted.

The cooling system of the invention can also be applied to other various fields, and the cooling system of the invention can be adopted as long as a device integrating a motor, a frequency converter and a pump is provided for improving noise reduction and temperature reduction and heat extraction.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.