An integrated fresh air system display and comparison device

Abstract

An integrated fresh air system display and comparison device includes a box body, which is divided into an AC motor fan duct and a DC brushless motor fan duct, the bottom of the box body is provided with a first and a second air inlet, the top of the box body is provided with a first and a second air supply port, the first air inlet and the first air supply port are connected to the AC motor fan duct, the second air inlet and the second air supply port are connected to the DC brushless motor fan duct, the AC motor fan duct is provided with a first filter device and an AC motor fan, the DC brushless motor fan duct is provided with a second filter device and a DC brushless motor fan, the box body is provided with a first controller, a first power meter, a second controller and a second power meter, and the AC motor fan is provided with a photoelectric tachometer for measuring the speed of the AC motor. The present invention can demonstrate the advantages of DC brushless motors over AC motors in fresh air systems, which is conducive to consumers choosing fresh air system products with better performance.

Description

Technical Field

[0001] The present invention relates to the field of fresh air systems, and in particular to an integrated fresh air system display and comparison device. Background Art

[0002] Fresh air systems are divided into three categories according to the direction of airflow: unidirectional flow, bidirectional flow, and bidirectional flow heat exchange. All three types of fresh air systems require a motor to drive the impeller, i.e., the fan, to achieve mechanical ventilation. The efficiency and performance of the motor are crucial to the performance of the fan and even the system. A high-efficiency motor can not only ensure higher air volume and pressure, but also reduce energy consumption, noise, heat, and increase service life. The motors of fresh air systems are divided into two categories: brushless DC motors and AC motors. Due to the differences in the performance characteristics of the two types of motors, the size and key parameters of the fresh air system are also very different. It is difficult to compare products under the same conditions when the product size, filter, and resistance conditions are different. Therefore, when introducing and promoting high-performance fresh air system products to customers, it is difficult for users to intuitively understand the difference between the two products. Summary of the invention

[0003] The present invention provides an integrated fresh air system display and comparison device, the main purpose of which is to overcome the problem that a brushless DC motor and an AC motor cannot be intuitively compared in the existing fresh air system.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] An integrated fresh air system display and comparison device comprises a box body, the box body is divided into an AC motor fan duct and a DC brushless motor fan duct, the bottom of the box body is provided with a first air inlet and a second air inlet, the top of the box body is provided with a first air supply port and a second air supply port, the first air inlet and the first air supply port are connected with the AC motor fan duct, the second air inlet and the second air supply port are connected with the DC brushless motor fan duct, a first filter device and an AC motor fan are provided in the AC motor fan duct, a second filter device and a DC brushless motor fan are provided in the DC brushless motor fan duct, the first filter device and The second filter device is the same, and the box body is provided with a first controller, a first power meter, a second controller and a second power meter, the first controller is connected to the AC motor fan, the first power meter is connected to the input power supply circuit of the AC motor fan, the first power meter is used to measure and display the effective value of the input power of the AC motor, the second controller is connected to the DC brushless motor fan, the second power meter is connected to the input power supply circuit of the DC brushless motor fan, the second power meter is used to measure and display the effective value of the input power of the DC brushless motor, and the AC motor fan is provided with a photoelectric tachometer for measuring the rotation speed of the AC motor.

[0006] Furthermore, the first filter device and the second filter device both include a primary filter, a medium-efficiency filter and a high-efficiency filter arranged in sequence from bottom to top, the AC motor fan is located between the medium-efficiency filter and the high-efficiency filter of the first filter device, and the DC brushless motor fan is located between the medium-efficiency filter and the high-efficiency filter of the second filter device.

[0007] Furthermore, the box body is provided with an AC motor fan speed monitoring screen and a DC brushless motor fan speed monitoring screen which are connected to the first controller and the second controller respectively.

[0008] A comparison method for an integrated fresh air system display device comprises the following steps:

[0009] S1. Divide the display comparison device into an AC motor fan duct and a DC brushless motor fan duct, set the same filter device in the AC motor fan duct and the DC brushless motor fan duct, and set the AC motor fan and the DC brushless motor fan in the AC motor fan duct and the DC brushless motor fan duct respectively;

[0010] S2, based on the fact that the speed of the AC motor at each air volume gear is fixed after the power supply voltage is constant and the resistance condition is determined, the speed and air volume gear of the AC motor are set by the first controller, which are respectively high-speed air volume gear, medium-speed air volume gear and low-speed air volume gear, and the speed of the AC motor at the high-speed, medium-speed and low-speed air volume gear is measured by a photoelectric tachometer, and is defined as RA 高档 , R.A. 中档 , R.A. 低档 ;

[0011] S3, RA 高档 , R.A. 中档 , R.A. 低档 The corresponding speed is set by the second controller to the speed of the brushless DC motor one by one, and is positioned as RD 高档 , RD 中档 , RD 低档 , that is, the RA after setting 高档 =RD 高档 , R.A. 中档 = RD 中档 , R.A. 低档 = RD 低档 ;

[0012] S4, when the AC motor fan duct and the DC brushless motor fan duct filter device are the same and the AC motor fan and the DC brushless motor fan have the same speed, the AC motor fan at RA is measured by the first power meter. 高档 , R.A. 中档 , R.A. 低档 The effective value of input power under the gear is defined as PA高档 ,PA 中档 ,PA 低档 The second power meter measures the RD of the brushless DC motor. 高档 , RD 中档 , RD 低档 The effective value of input power under the gear is positioned as PD 高档 , PD 中档 , PD 低档 , compared with PA 高档 With PD 高档 Size, PA 中档 With PD 中档 Size, PA 低档 With PD 低档 The size of can show the effective value of the input power of the AC motor fan and the DC brushless motor fan under the same speed conditions (i.e. the relevant fresh air volume).

[0013] Furthermore, the comparison method further includes step S5, setting three gear speeds corresponding to the effective value of the input power of the AC motor in the DC brushless motor, and positioning them as RD 模式1 , RD 模式2 , RD 模式3 , R.D. 模式1 , RD 模式2 , RD 模式3 The corresponding input power effective values ​​are positioned as PD 模式1 , PD 模式2 , PD 模式3 , corresponding to the measured input power effective value PD 模式1 =PA 高档 , PD 模式2 =PA 中档 , P.D. 模式3 =PA 低档 Under the premise of measuring and displaying the RD of the brushless DC motor through a photoelectric tachometer 模式1 , RD 模式2 , RD 模式3 , compared with RA 高档 With RD 模式1 Size, RA 中档 With RD 模式2 Size, RA 低档 With RD 模式3 The size of the fan can show the amount of fresh air generated by the AC motor fan and the DC brushless motor fan under the same power consumption.

[0014] Furthermore, the filter device in step S1 is divided into three levels, including a primary filter, a medium efficiency filter and a high efficiency filter arranged from bottom to top, the AC motor fan is located between the medium efficiency filter and the high efficiency filter of the first filter device, and the DC brushless motor fan is located between the medium efficiency filter and the high efficiency filter of the second filter device.

[0015] Furthermore, the second controller also has an independent one-speed stepless speed change and adopts a soft start method to demonstrate the advantages of soft start and stepless speed change of the DC brushless motor.

[0016] From the above description of the present invention, it can be seen that compared with the prior art, the present invention has the following advantages: 高档 =RD 高档 , R.A. 中档 = RD 中档 , R.A. 低档 = RD 低档 Under the condition of 高档 >PD 高档 , P.A. 中档 >PD 中档 , P.A. 低档 >PD 低档 That is, under the same resistance of the air duct, and under the same speed of the AC motor fan and the DC brushless motor fan (i.e. equal fresh air volume), the effective value of the input power of the AC motor fan is greater than the effective value of the input power of the DC brushless motor fan, thus demonstrating the energy-saving effect of the DC brushless motor fan. 模式1 =PA 高档 , PD 模式2 =PA 中档 , P.D. 模式3 =PA 低档 Under the condition of 模式1 >RA 高档 , R.D. 模式2 > RA中档 , R.D. 模式3 >RA 低档 That is, under the condition of the same power consumption, the amount of fresh air generated by the DC brushless motor fan is greater than that generated by the AC motor fan. It can be seen that the advantages of the DC brushless motor over the AC motor in the fresh air system can be demonstrated through the present invention, which is conducive to consumers to choose fresh air system products with better performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the internal structure diagram of the present invention.

[0018] Figure 2 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0019] Reference Figure 1 An integrated fresh air system display and comparison device includes a box body 1, which is divided into an AC motor fan duct 2 and a DC brushless motor fan duct 3. The bottom of the box body 1 is provided with a first air inlet 4 and a second air inlet 5, and the top of the box body 1 is provided with a first air supply 6 and a second air supply 7. The first air inlet 4 and the first air supply 6 are connected to the AC motor fan duct 2, and the second air inlet 5 and the second air supply 7 are connected to the DC brushless motor fan duct 3. The AC motor fan duct 2 is provided with a first filter device and an AC motor fan 9, and the DC brushless motor fan duct 3 is provided with a second filter device and a DC brushless motor fan 10, and the first filter device and the second filter device are the same. The box 1 is provided with a first controller 11, a first power meter 12, a second controller 13 and a second power meter 14. The first controller 11 is connected to the AC motor fan 9. The first power meter 12 is connected to the input power supply circuit of the AC motor fan 9. The first power meter 12 is used to measure and display the effective value of the input power of the AC motor. The second controller 13 is connected to the DC brushless motor fan 10. The second power meter 14 is connected to the input power supply circuit of the DC brushless motor fan 10. The second power meter 14 is used to measure and display the effective value of the input power of the DC brushless motor. The AC motor fan 9 is provided with a photoelectric tachometer (not shown in the figure) for measuring the rotation speed of the AC motor.

[0020] Reference Figure 1 The first filter device and the second filter device both include a primary filter 81, a medium filter 82 and a high efficiency filter 83 arranged in sequence from bottom to top, the AC motor fan 9 is located between the medium filter 82 and the high efficiency filter 83 of the first filter device, and the DC brushless motor fan 10 is located between the medium filter 82 and the high efficiency filter 83 of the second filter device. The box body 1 is provided with an AC motor fan speed monitoring screen 15 and a DC brushless motor fan speed monitoring screen 16 connected to the first controller 11 and the second controller 13 respectively. The box body 1 is also provided with a voltage regulator (not shown in the figure) connected to the first controller 11 and the second controller 13, and the voltage regulator (not shown in the figure) is used to adjust and ensure the stability of the mains power supply voltage.

[0021] Reference Figure 1 and Figure 2 , a comparison method of an integrated fresh air system display device, comprising the following steps:

[0022] S1. The display comparison device is divided into an AC motor fan duct 2 and a DC brushless motor fan duct 3. The same filter device is set in the AC motor fan duct 2 and the DC brushless motor fan duct 3 so that the resistance in the two ducts is the same. The AC motor fan 9 and the DC brushless motor fan 10 are respectively set in the AC motor fan duct 2 and the DC brushless motor fan duct 3;

[0023] S2, based on the fact that the speed of the AC motor at each air volume gear is fixed after the power supply voltage is constant and the resistance condition is determined, the speed and air volume gear of the AC motor are set by the first controller 11, which are respectively a high-speed air volume gear, a medium-speed air volume gear and a low-speed air volume gear, and the speed of the AC motor at the high-speed, medium-speed and low-speed air volume gear is measured by a photoelectric tachometer, and is defined as RA 高档 , R.A. 中档 , R.A. 低档 ;

[0024] S3, RA 高档 , R.A. 中档 , R.A. 低档 The corresponding speeds are set one by one by the second controller 13 for the brushless DC motors, and are respectively positioned as RD 高档 , RD 中档 , RD 低档 , that is, the RA after setting 高档 =RD 高档 , R.A. 中档 = RD 中档 , R.A. 低档 =RD 低档 ;

[0025] S4, when the filter screen devices of the AC motor fan duct 2 and the DC brushless motor fan duct 3 are the same and the speeds of the AC motor fan and the DC brushless motor fan are the same, the AC motor fan speed at RA is measured by the first power meter 12. 高档 , R.A. 中档 , R.A. 低档 The effective value of input power under the gear is defined as PA 高档 ,PA 中档 ,PA 低档 The second power meter 14 measures the RD value of the brushless DC motor. 高档 , RD 中档 , RD 低档 The effective value of input power under the gear is positioned as PD 高档 , PD 中档 , PD 低档 , compared with PA 高档 With PD 高档 Size, PA 中档 With PD 中档Size, PA 低档 With PD 低档 The size of can show the effective value of the input power of the AC motor fan and the DC brushless motor fan under the same speed conditions (i.e. the relevant fresh air volume).

[0026] S5. In addition, three gear speeds corresponding to the effective value of the input power of the AC motor are set on the DC brushless motor, and they are respectively positioned as RD 模式1 , RD 模式2 , RD 模式3 , R.D. 模式1 , RD 模式2 , RD 模式3 The corresponding input power effective values ​​are positioned as PD 模式1 , PD 模式2 , PD 模式3 , corresponding to the measured input power effective value PD 模式1 =PA 高档 , PD 模式2 =PA 中档 , P.D. 模式3 =PA 低档 Under the premise of measuring and displaying the RD of the brushless DC motor through a photoelectric tachometer 模式1 , RD 模式2 , RD 模式3 , compared with RA 高档 With RD 模式1 Size, RA 中档 With RD 模式2 Size, RA 低档 With RD 模式3 The size of the fan can show the amount of fresh air generated by the AC motor fan and the DC brushless motor fan under the same power consumption.

[0027] In RA 高档 =RD 高档 , R.A. 中档 = RD 中档 , R.A. 低档 = RD 低档 Under the condition of 高档 >PD 高档 , P.A. 中档 >PD 中档 , P.A. 低档 >PD 低档 That is, under the same speed conditions (i.e., relevant fresh air volume), the effective value of the input power of the AC motor fan is greater than the effective value of the input power of the DC brushless motor fan, thus demonstrating the energy-saving effect of the DC brushless motor fan. 模式1 =PA 高档 , PD 模式2 =PA中档 , P.D. 模式3 =PA 低档 Under the condition of 模式1 >RA 高档 , R.D. 模式2 > RA中档 , R.D. 模式3 >RA 低档 That is, under the condition of the same power consumption, the amount of fresh air generated by the DC brushless motor fan is greater than that generated by the AC motor fan.

[0028] The filter device in step S1 is divided into three levels, including a primary filter 81, a medium filter 82 and a high efficiency filter 83 arranged from bottom to top, the AC motor fan 9 is located between the medium filter 82 and the high efficiency filter 83 of the first filter device, and the DC brushless motor fan 10 is located between the medium filter 82 and the high efficiency filter 83 of the second filter device. The second controller 13 also has an independent one-speed stepless speed change, and adopts a soft start method to demonstrate the advantages of soft start and stepless speed change of the DC brushless motor.

[0029] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. An integrated fresh air system display and comparison device, characterized in that: The invention comprises a box body, which is divided into an AC motor fan duct and a DC brushless motor fan duct, a first air inlet and a second air inlet are arranged at the bottom of the box body, a first air supply port and a second air supply port are arranged at the top of the box body, the first air inlet and the first air supply port are communicated with the AC motor fan duct, the second air inlet and the second air supply port are communicated with the DC brushless motor fan duct, a first filter device and an AC motor fan are arranged in the AC motor fan duct, a second filter device and a DC brushless motor fan are arranged in the DC brushless motor fan duct, and the first filter device and the second filter device are identical The box body is provided with a first controller, a first power meter, a second controller and a second power meter, the first controller is connected to the AC motor fan, the first power meter is connected to the input power supply circuit of the AC motor fan, the first power meter is used to measure and display the effective value of the input power of the AC motor, the second controller is connected to the DC brushless motor fan, the second power meter is connected to the input power supply circuit of the DC brushless motor fan, the second power meter is used to measure and display the effective value of the input power of the DC brushless motor, and the AC motor fan is provided with a photoelectric tachometer for measuring the speed of the AC motor; The first filter device and the second filter device both include a primary filter, a medium filter and a high efficiency filter arranged in sequence from bottom to top, the AC motor fan is located between the medium filter and the high efficiency filter of the first filter device, and the DC brushless motor fan is located between the medium filter and the high efficiency filter of the second filter device; The box body is provided with an AC motor fan speed monitoring screen and a DC brushless motor fan speed monitoring screen which are connected to the first controller and the second controller respectively; The comparison method of the integrated fresh air system display comparison device comprises the following steps: S1. Divide the display comparison device into an AC motor fan duct and a DC brushless motor fan duct, set the same filter device in the AC motor fan duct and the DC brushless motor fan duct, and set the AC motor fan and the DC brushless motor fan in the AC motor fan duct and the DC brushless motor fan duct respectively; S2, based on the fact that the speed of the AC motor at each air volume gear is fixed after the power supply voltage is constant and the resistance condition is determined, the speed and air volume gear of the AC motor are set by the first controller, which are respectively high-speed air volume gear, medium-speed air volume gear and low-speed air volume gear, and the speed of the AC motor at the high-speed, medium-speed and low-speed air volume gear is measured by a photoelectric tachometer, and is defined as RA 高档 , R.A. 中档 , R.A. 低档 ; S3, RA 高档 , R.A. 中档 , R.A. 低档 The corresponding speed is set by the second controller to the speed of the brushless DC motor one by one, and is positioned as RD 高档 , RD 中档 , RD 低档 , that is, the RA after setting 高档 =RD 高档 , R.A. 中档 = RD 中档 , R.A. 低档 = RD 低档 ; S4, when the AC motor fan duct and the DC brushless motor fan duct filter device are the same and the AC motor fan and the DC brushless motor fan have the same speed, the AC motor fan at RA is measured by the first power meter. 高档 , R.A. 中档 , R.A. 低档 The effective value of input power under the gear is defined as PA 高档 ,PA 中档 ,PA 低档 The second power meter measures the RD of the brushless DC motor. 高档 , RD 中档 , RD 低档 The effective value of the input power under the gear is positioned as PD 高档 , PD 中档 , PD 低档 , compared with PA 高档 With PD 高档 Size, PA 中档 With PD 中档 Size, PA 低档 With PD 低档 The size of can show the effective value of the input power of the AC motor fan and the DC brushless motor fan under the same speed conditions.

2. The integrated fresh air system display and comparison device according to claim 1, characterized in that: The comparison method further comprises step S5, in which three gear speeds corresponding to the effective value of the input power of the AC motor are set in the DC brushless motor, and are respectively positioned as RD 模式1 , RD 模式2 , RD 模式3 , R.D. 模式1 , RD 模式2 , RD 模式3 The corresponding input power effective values ​​are positioned as PD 模式1 , PD 模式2 , PD 模式3 , corresponding to the measured input power effective value PD 模式1 =PA 高档 , PD 模式2 =PA 中档 , P.D. 模式3 =PA 低档 Under the premise of measuring and displaying the RD of the brushless DC motor through a photoelectric tachometer 模式1 , RD 模式2 , RD 模式3 , compared with RA 高档 With RD 模式1 Size, RA 中档 With RD 模式2 Size, RA 低档 With RD 模式3 The size of can show the amount of fresh air generated by AC motor fans and DC brushless motor fans under the condition of the same power consumption.

3. An integrated fresh air system display and comparison device as claimed in claim 1 or 2, characterized in that: The filter device in step S1 is divided into three levels, including a primary filter, a medium filter and a high efficiency filter arranged from bottom to top, the AC motor fan is located between the medium filter and the high efficiency filter of the first filter device, and the DC brushless motor fan is located between the medium filter and the high efficiency filter of the second filter device.

4. An integrated fresh air system display and comparison device as claimed in claim 1 or 2, characterized in that: The second controller also has an independent first gear for continuously variable speed, and adopts a soft start method to demonstrate the advantages of soft start and continuously variable speed of the brushless DC motor.

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