Fresh air interchanger with built-in direct-current brushless fan for frequency conversion control

Abstract

The utility model relates to the technical field of fresh air exchange, in particular to a fresh air exchange device with a built-in direct-current brushless fan for frequency conversion control, and adopts the technical scheme that the fresh air exchange device comprises a shell, an air inlet pipe is inserted into one side of the shell, an air outlet pipe is inserted into the other side of the shell, and a filter cabin is fixedly mounted at one end, inserted into the shell, of the air inlet pipe; the fresh air ventilation device has the advantages that electromagnetic interference generated by the brushless motor is shielded through the electromagnetic shielding sleeve, so that the effect of preventing the brushless motor from interfering with other electronic equipment in the fresh air ventilation device is achieved, and the fresh air ventilation device is high in practicability. Voltage fluctuation is stabilized through the capacitance filter and the voltage stabilizer to achieve the effect of preventing the brushless motor from being influenced by power grid voltage change, and centralized heat dissipation is performed on the brushless motor through the heat dissipation device to achieve the effects of reducing environment temperature fluctuation and keeping stable operation of the brushless motor.

Description

Technical Field

[0001] The utility model relates to the technical field of fresh air ventilation, and particularly relates to a fresh air ventilation device with variable frequency control of an internal DC brushless fan. Background Art

[0002] Fresh air ventilation devices are common equipment in modern buildings and residences, aiming to provide efficient air ventilation and energy-saving functions. The fan is the basis for the operation of the entire device. Most of the current similar products use AC induction motors. AC induction motors have low costs and relatively stable operations, but they have relatively high noise and power consumption. In recent years, with the development of motor technology, the application of DC brushless motors in fresh air ventilation devices has become increasingly widespread.

[0003] The prior art has the following deficiencies: Although both DC brushless motors and AC induction motors have their own advantages and disadvantages in fresh air ventilation devices, DC brushless motors still have the following defects compared to AC induction motors:

[0004] 1. When a DC brushless motor operates, it may generate electromagnetic interference, which is likely to interfere with other electronic devices and wireless communication systems inside the fresh air ventilation device. In this regard, AC induction motors usually have better electromagnetic compatibility.

[0005] 2. DC brushless motors have relatively poor adaptability to voltage fluctuations and environmental conditions in the working environment, while AC induction motors can usually better cope with changes in grid voltage and environmental temperature fluctuations and maintain a stable operating state.

[0006] Therefore, it is very necessary to invent a fresh air ventilation device with variable frequency control of an internal DC brushless fan. Content of the Utility Model

[0007] In order to achieve the above object, the utility model provides the following technical solution: A fresh air ventilation device with variable frequency control of an internal DC brushless fan, including a housing. One side of the housing is inserted and installed with an air inlet pipe, and the other side of the housing is inserted and installed with an air outlet pipe. One end of the air inlet pipe inserted into the housing is fixedly installed with a filter chamber, and one end of the air outlet pipe inserted into the housing is fixedly installed with an air flow chamber. The end of the air flow chamber far from the air outlet pipe is fixedly connected with a guide air pipe, and the guide air pipe is inserted into the side of the filter chamber far from the air inlet pipe. A brushless motor is installed inside the air flow chamber. The output end of the brushless motor is connected to an impeller. An electromagnetic shielding sleeve is sleeved outside the brushless motor, and the electromagnetic shielding sleeve can shield electromagnetic interference. One side of the brushless motor is connected with a wire, and the wire is connected with a capacitor filter and a voltage stabilizer. A heat dissipation device is arranged on the other side of the brushless motor far from the wire, and the heat dissipation device can dissipate heat and cool down the brushless motor.

[0008] Preferably, a bracket is fixedly installed on one side of the inner wall of the air flow chamber, the bracket extends to the middle of the air flow chamber, and the brushless motor is fixedly installed at one end of the bracket extending to the middle of the air flow chamber.

[0009] Preferably, the end of the brushless motor close to the air duct is set as the output end, and the side of the impeller away from the output end of the brushless motor extends to the connection port of the air duct and the air flow chamber.

[0010] Preferably, the electromagnetic shielding sleeve is sleeved outside the brushless motor, there is a gap between the inner wall of the electromagnetic shielding sleeve and the brushless motor, and the electromagnetic shielding sleeve is fixedly installed at one end of the bracket extending to the middle of the air flow chamber.

[0011] Preferably, the heat dissipation device includes an outer casing, the outer casing is sleeved outside the electromagnetic shielding sleeve, there is a gap between the inner wall of the outer casing and the outer wall of the electromagnetic shielding sleeve, and the outer casing is fixedly installed at one end of the bracket extending to the middle of the air flow chamber.

[0012] Preferably, the heat dissipation device includes a radiator, the radiator is fixedly installed on the outer wall of one side of the casing, a air duct is fixedly connected to the side of the outer casing close to the radiator, and the air duct penetrates through the air flow chamber and the casing and is connected to the radiator.

[0013] Preferably, one end of the wire is connected to the side of the brushless motor away from the air duct, the other end of the wire penetrates through the bracket, the air flow chamber and the casing, the end of the wire penetrating through the casing is electrically connected to a capacitor filter, one side of the capacitor filter is connected to a voltage stabilizer, and the side of the voltage stabilizer away from the capacitor filter is connected to a power supply wire.

[0014] Preferably, a number of filter sheets are arranged and installed on the inner wall of the filtration chamber, EEP filling is provided between the inner wall of the casing and the outer wall of the filtration chamber, and EEP filling is also provided between the inner wall of the casing and the outer wall of the air flow chamber.

[0015] The beneficial effects of the present utility model are:

[0016] 1. The electromagnetic interference generated by the brushless motor is shielded by the electromagnetic shielding sleeve, so as to avoid the interference of the brushless motor on other electronic devices and wireless communication systems in the fresh air ventilation device;

[0017] 2. The voltage fluctuation in the working environment is stabilized by the capacitor filter and the voltage stabilizer, so as to avoid the influence of the brushless motor by the change of the grid voltage and keep the brushless motor in a stable operating state;

[0018] 3. The brushless motor is centrally cooled by the heat dissipation device, so as to reduce the environmental temperature fluctuation and keep the brushless motor running stably. Description of the Drawings

[0019] Figure 1 Top view of a fresh air ventilation device with variable frequency control of an internal DC brushless fan provided by the present utility model;

[0020] Figure 2 Cross-sectional view of the housing of a fresh air ventilation device with variable frequency control of an internal DC brushless fan provided by the present utility model;

[0021] Figure 3 Schematic diagram of the internal structure of the filter chamber and the air flow chamber of a fresh air ventilation device with variable frequency control of an internal DC brushless fan provided by the present utility model;

[0022] Figure 4 Partial exploded view of a fresh air ventilation device with variable frequency control of an internal DC brushless fan provided by the present utility model;

[0023] Figure 5 Cross-sectional view of the internal structure of the air flow chamber of a fresh air ventilation device with variable frequency control of an internal DC brushless fan provided by the present utility model;

[0024] Figure 6 Exploded view of the external structure of the brushless motor of a fresh air ventilation device with variable frequency control of an internal DC brushless fan provided by the present utility model.

[0025] In the figure: housing 11, filter chamber 12, air flow chamber 13, air outlet pipe 14, air inlet pipe 15, EEP filling 16, air guide pipe 17, filter element 18, bracket 21, brushless motor 22, impeller 23, electromagnetic shielding sleeve 24, outer housing 25, air duct 26, radiator 27, wire 28, capacitor filter 29, voltage stabilizer 30, power cord 31. Specific embodiments

[0026] The following describes the preferred embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustration and explanation of the present utility model, and are not intended to limit the present utility model.

[0027] Embodiment 1

[0028] As Figures 1-6As shown in the figure, a fresh air ventilation device with variable frequency control of an internal DC brushless fan in the first aspect of the present utility model includes a housing 11. One side of the housing 11 is inserted and installed with an air inlet pipe 15, and the other side of the housing 11 is inserted and installed with an air outlet pipe 14. One end of the air inlet pipe 15 inserted into the housing 11 is fixedly installed with a filter cabin 12, and one end of the air outlet pipe 14 inserted into the housing 11 is fixedly installed with an air flow cabin 13. One end of the air flow cabin 13 away from the air outlet pipe 14 is fixedly connected to a guide air pipe 17. The guide air pipe 17 is inserted into one side of the filter cabin 12 away from the air inlet pipe 15. A brushless motor 22 is installed in the air flow cabin 13. The output end of the brushless motor 22 is connected to an impeller 23. An electromagnetic shielding sleeve 24 is sleeved outside the brushless motor 22. The electromagnetic shielding sleeve 24 can shield electromagnetic interference. One side of the brushless motor 22 is connected to a wire 28, and the wire 28 is connected to a capacitor filter 29 and a voltage stabilizer 30. On the other side of the brushless motor 22 away from the wire 28, there is a heat dissipation device, and the heat dissipation device can dissipate heat and cool down the brushless motor 22.

[0029] In the above embodiment, it should be noted that the brushless motor 22 has the function of variable frequency control. The air inlet pipe 15 extends to the outside of the room, and the air outlet pipe 14 extends to the inside of the room. The inner wall of the air flow cabin 13 is set as a curved surface with air guiding ability, which can effectively reduce the turbulent flow in the air flow cabin 13. By starting the brushless motor 22 to drive the impeller 23 to rotate at a high speed, the air outside the room is drawn into the air inlet pipe 15 and filtered through the filter cabin 12. Then the air enters the air flow cabin 13 along the guide air pipe 17 and finally enters the room from the air outlet pipe 14 to achieve the effect of fresh air ventilation; the electromagnetic interference generated by the brushless motor 22 is shielded by the electromagnetic shielding sleeve 24 to avoid the interference of the brushless motor 22 on other electronic devices and wireless communication systems in the fresh air ventilation device; the voltage fluctuation in the working environment is stabilized by the capacitor filter 39 and the voltage stabilizer 30 to avoid the influence of the change of the grid voltage on the brushless motor 22 and keep the brushless motor 22 in a stable operating state; the brushless motor 22 is centrally cooled by the heat dissipation device to reduce the fluctuation of the ambient temperature and keep the brushless motor 22 running stably.

[0030] Embodiment 2

[0031] As Figures 3-6 shown, a fresh air ventilation device with variable frequency control of an internal DC brushless fan includes all the contents of Embodiment 1. In addition, one side of the inner wall of the air flow cabin 13 is fixedly installed with a bracket 21. The bracket 21 extends to the middle of the air flow cabin 13. The brushless motor 22 is fixedly installed at one end of the bracket 21 extending to the middle of the air flow cabin 13. One end of the brushless motor 22 close to the guide air pipe 17 is set as the output end, and one side of the impeller 23 away from the output end of the brushless motor 22 extends to the connection port of the guide air pipe 17 and the air flow cabin 13.

[0032] In the above embodiments, it should be noted that the bracket 21 is made of metal material. By means of the bracket 21, the effect of fixing the brushless motor 22 in the middle of the air flow chamber 13 is achieved. Starting the brushless motor 22 can drive the impeller 23 to rotate at a high speed.

[0033] Embodiment 3

[0034] As Figure 5 and Figure 6 shown, a fresh air ventilation device with variable frequency control of an internal DC brushless fan includes all the contents of Embodiment 1. In addition, the electromagnetic shielding sleeve 24 is sleeved outside the brushless motor 22. There is a gap between the inner wall of the electromagnetic shielding sleeve 24 and the brushless motor 22. The electromagnetic shielding sleeve 24 is fixedly installed at one end of the bracket 21 extending to the middle of the air flow chamber 13.

[0035] In the above embodiments, it should be noted that the electromagnetic shielding sleeve 24 is made of nickel alloy material. The electromagnetic shielding sleeve 24 can effectively absorb or reflect electromagnetic waves, preventing electromagnetic waves from passing through the cover and entering or escaping from the inside of the cover.

[0036] Embodiment 4

[0037] As Figures 3-6 shown, a fresh air ventilation device with variable frequency control of an internal DC brushless fan includes all the contents of Embodiment 3. In addition, the heat dissipation device includes an outer shell 25. The outer shell 25 is sleeved outside the electromagnetic shielding sleeve 24. There is a gap between the inner wall of the outer shell 25 and the outer wall of the electromagnetic shielding sleeve 24. The outer shell 25 is fixedly installed at one end of the bracket 21 extending to the middle of the air flow chamber 13. The heat dissipation device includes a radiator 27. The radiator 27 is fixedly installed on the outer wall of one side of the outer shell 11. One side of the outer shell 25 close to the radiator 27 is fixedly connected to an air duct 26. The air duct 26 penetrates through the air flow chamber 13 and the outer shell 11 and is connected to the radiator 27.

[0038] In the above embodiments, it should be noted that the radiator 27 is a device for dissipating heat or thermal energy and belongs to the prior art. The radiator 27 can transfer the hot air in the outer shell 25 to the surrounding environment along the air duct 26 to keep the temperature in the outer shell 25 within a safe range.

[0039] Embodiment 5

[0040] As Figures 1-4As shown in the figure, a fresh air ventilation device with variable frequency control of a built-in DC brushless fan includes all the contents of Embodiment 4. In addition, one end of the wire 28 is connected to the side of the brushless motor 22 away from the air duct 26. The other end of the wire 28 passes through the bracket 21, the air flow chamber 13 and the housing 11. The end of the wire 28 passing through the housing 11 is electrically connected to the capacitor filter 29. One side of the capacitor filter 29 is connected to the voltage stabilizer 30. The side of the voltage stabilizer 30 away from the capacitor filter 29 is connected to the power supply line 31.

[0041] In the above embodiment, it should be noted that the capacitor filter 29 can remove high-frequency noise or fluctuations in the power supply, thereby making the power supply signal more stable, which belongs to the prior art; the voltage stabilizer 30 is used to stabilize the voltage of the input power supply to ensure that the output voltage remains stable within the set range; the power supply line 31 is connected to the power supply.

[0042] Embodiment 6

[0043] As Figures 2-4 shown in the figure, a fresh air ventilation device with variable frequency control of a built-in DC brushless fan includes all the contents of Embodiment 1. In addition, a plurality of filter sheets 18 are arranged and installed on the inner wall of the filter chamber 12. An EEP filling 16 is provided between the inner wall of the housing 11 and the outer wall of the filter chamber 12. An EEP filling 16 is also provided between the inner wall of the housing 11 and the outer wall of the air flow chamber 13.

[0044] In the above embodiment, it should be noted that the filter sheet 18 functions to filter dust in the outdoor air. The EEP filling 16 is a common filler in electronic and electrical products, mainly used for filling voids, preventing vibration, fixing components, preventing moisture, etc. At the same time, the EEP filling 16 also has the function of sound insulation and noise reduction.

[0045] The use process of the present utility model is as follows: Those skilled in the art start the brushless motor 22 to drive the impeller 23 to rotate at a high speed, draw outdoor air into the intake duct 15 and filter it through the filter sheet 18 in the filter chamber 12. Then the air enters the air flow chamber 13 along the duct 17 and finally enters the room from the outlet duct 14 to complete fresh air ventilation. During the operation of the brushless motor 22, the electromagnetic shielding sleeve 24 shields the electromagnetic interference generated by the brushless motor 22 to avoid interference with other electronic devices and wireless communication systems in the fresh air ventilation device. At the same time, the capacitor filter 39 and the voltage stabilizer 30 stabilize the voltage fluctuation in the working environment. Then the radiator 27 is started to transfer the hot air in the outer casing 25 to the surrounding environment along the air duct 26, so that the brushless motor 22 operates stably.

[0046] The above are only the preferred embodiments of the present utility model. Any person skilled in the art may modify the present utility model by using the technical solutions described above or modify it into equivalent technical solutions. Therefore, any simple modification or equivalent replacement made according to the technical solutions of the present utility model falls within the scope of protection required by the present utility model.

Claims

1. A fresh air ventilation device with a built-in DC brushless fan frequency conversion control, comprising a housing (11), an air inlet pipe (15) is inserted and installed on one side of the housing (11), an air outlet pipe (14) is inserted and installed on the other side of the housing (11), a filter cabin (12) is fixedly installed on one end of the air inlet pipe (15) inserted into the housing (11), an air flow cabin (13) is fixedly installed on one end of the air outlet pipe (14) inserted into the housing (11), an end of the air flow cabin (13) away from the air outlet pipe (14) is fixedly connected to an air guide pipe (17), and the air guide pipe (17) is inserted into the filter cabin (12) away from the air inlet pipe (15), characterized in that: A brushless motor (22) is installed in the airflow chamber (13); the output end of the brushless motor (22) is connected to an impeller (23); an electromagnetic shielding sleeve (24) is sleeved on the outside of the brushless motor (22); the electromagnetic shielding sleeve (24) is capable of shielding electromagnetic interference; a wire (28) is connected to one side of the brushless motor (22); the wire (28) is connected to a capacitor filter (29) and a voltage stabilizer (30); a heat dissipation device is provided on the other side of the brushless motor (22) away from the wire (28); the heat dissipation device is capable of dissipating heat and cooling the brushless motor (22).

2. A fresh air ventilation device with built-in DC brushless fan frequency conversion control according to claim 1, characterized in that: A bracket (21) is fixedly mounted on one side of the inner wall of the airflow chamber (13), the bracket (21) extends to the middle of the airflow chamber (13), and the brushless motor (22) is fixedly mounted on one end of the bracket (21) extending to the middle of the airflow chamber (13).

3. A fresh air ventilation device with built-in DC brushless fan frequency conversion control according to claim 2, characterized in that: One end of the brushless motor (22) close to the air duct (17) is arranged as an output end, and a side of the impeller (23) away from the output end of the brushless motor (22) extends to a connection port between the air duct (17) and the air flow chamber (13).

4. A fresh air ventilation device with built-in DC brushless fan frequency conversion control according to claim 1, characterized in that: The electromagnetic shielding sleeve (24) is sleeved on the outside of the brushless motor (22), a gap is provided between the inner wall of the electromagnetic shielding sleeve (24) and the brushless motor (22), and the electromagnetic shielding sleeve (24) is fixedly mounted on one end of the bracket (21) extending to the middle of the airflow chamber (13).

5. A fresh air ventilation device with built-in DC brushless fan frequency conversion control according to claim 4, characterized in that: The heat dissipation device comprises an outer shell (25), the outer shell (25) is sleeved on the outside of the electromagnetic shielding sleeve (24), a gap is provided between the inner wall of the outer shell (25) and the outer wall of the electromagnetic shielding sleeve (24), and the outer shell (25) is fixedly mounted on one end of the bracket (21) extending to the middle of the airflow chamber (13).

6. A fresh air ventilation device with built-in DC brushless fan frequency conversion control according to claim 5, characterized in that: The heat dissipation device comprises a radiator (27), wherein the radiator (27) is fixedly mounted on an outer wall of one side of the outer shell (11), and a side of the outer shell (25) close to the radiator (27) is fixedly connected to an air duct (26), wherein the air duct (26) passes through the air flow compartment (13) and the outer shell (11) and is connected to the radiator (27).

7. A fresh air ventilation device with built-in DC brushless fan frequency conversion control according to claim 6, characterized in that: One end of the wire (28) is connected to a side of the brushless motor (22) away from the air duct (26), and the other end of the wire (28) passes through the bracket (21), the airflow chamber (13) and the housing (11); the end of the wire (28) passing through the housing (11) is electrically connected to a capacitor filter (29), one side of the capacitor filter (29) is connected to a voltage stabilizer (30), and the side of the voltage stabilizer (30) away from the capacitor filter (29) is connected to a power line (31).

8. A fresh air ventilation device with built-in DC brushless fan frequency conversion control according to claim 1, characterized in that: A plurality of filter discs (18) are arranged and installed on the inner wall of the filter chamber (12), an EEP filler (16) is arranged between the inner wall of the outer shell (11) and the outer wall of the filter chamber (12), and an EEP filler (16) is also arranged between the inner wall of the outer shell (11) and the outer wall of the airflow chamber (13).

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