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Draught fan with large air volume and low power consumption

A technology with low power consumption and large air volume, applied in mechanical equipment, machines/engines, liquid fuel engines, etc., to achieve the effect of increasing the air outlet area, reducing noise, and increasing air volume

Pending Publication Date: 2018-06-15
郏松筠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the existing air conditioning and heat pump systems, the structure of the fan limits the increase of the air volume, so that the temperature difference between the inlet and outlet air of the outdoor unit heat exchanger is limited to a relatively high value, generally exceeding 10°C

Method used

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  • Draught fan with large air volume and low power consumption
  • Draught fan with large air volume and low power consumption
  • Draught fan with large air volume and low power consumption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: Cylindrical fan

[0031] In this example, see figure 1 , figure 2 , the fan includes the fan blade ① of the axial fan and the wind wheel ④ of the centrifugal fan. The fan blade ① and the wind wheel ④ are relatively fixed and driven by the same motor. The fan blade ① produces axial airflow, and the wind wheel ④ produces radial flow. airflow. Except for the area near the central axis ② where the motor is located, the speed of the axial airflow and the radial airflow just leaving the wind wheel ④ are basically the same, and the difference in wind speed between them is not more than 50%. The radial air outlet area is not less than 1 / 2 of the axial air outlet area, that is, the side surface area of ​​the cylinder formed by the wind wheel is not less than 1 / 2 of the circle area at the top of the cylinder. There are several air guiding rings ③ or air guiding vanes on the outer surface of the cylinder to deflect the radial air outlet to the axial flow directio...

Embodiment 2

[0035] Embodiment 2: parabolic fan

[0036] see Figure 4 , Figure 5 , the blades of the fan in this embodiment are smooth and curved in the length direction. When the fan ① rotates, the blades form a parabolic gyroscopic body. Except for the area where the motor is installed near the central axis ②, other air outlet surfaces S1 ⑥ The speeds of the airflows at all positions are basically the same, and the difference of the wind speeds among them is not more than 50%.

[0037] If the present invention is used for ventilation and exhaust in two isolated spaces, such as indoor air is discharged to the outside, the general fan is not equipped with guide vanes and guide rings ③.

[0038] If the fan is used for air conditioners and air source heat pumps, it is generally necessary to install deflectors or guide rings ③. The deflectors or guide rings ③ can be fixed on the fan and rotate with the fan, or can be fixed on the fan. The equipment casing does not rotate with the fan.

Embodiment 3

[0039] Embodiment 3: spherical ventilation fan

[0040] see image 3 , the vane ① of the fan in this embodiment is smooth and curved in the length direction. When the fan rotates, the vane ① forms a spherical gyroscopic air outlet surface. The fan is installed on the exhaust side. The ventilation pipe ⑨ of the body ⑩ is connected with each other, the air inlet of the ventilation pipe ⑨ is on the suction side of the wall ⑩, and the air inlet of the ventilation pipe is connected with a tapered air guide pipe ⑤, and the cross-sectional area of ​​the tapered air guide pipe ⑤ gradually increases from outside to inside. Narrowing, the shrinkage end of the tapered air guide pipe ⑤ is connected with the ventilation pipe ⑨, and the diameter of the shrinkage end of the tapered air guide pipe ⑤ is the same as the diameter of the ventilation pipe ⑨. Except for the area near the position of the central axis ② where the motor is installed, the speeds of the airflows at other positions on t...

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PUM

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Abstract

The invention relates to a draught fan with large air volume and low power consumption. A gas driving component in the draught fan is a fan blade which is smoothly curved in the longitudinal directionor is composed of fan blades of an axial flow fan and wind wheels of a centrifugal fan. When the gas driving member rotates, a curved air outlet surface of a convolution shape is formed, and the curved air outlet area of the draught fan is larger than the air outlet area of the axial flow fan with the same diameter. The air outlet of the draught fan has a radial flow component, except for an axial flow component. Except for the axis position, the airflow speed of the air outlet in other places is basically the same. The draught fan has the advantages that the outlet air area is larger, the outlet air speed is small, the outlet air volume is large and the fan has low power consumption. The ventilation draught fan can save energy by 30%-90% and reduce noise; the temperature difference between the inlet and outlet air of a condenser and an evaporator of an air-conditioning heat pump is effectively reduced, and the COP is increased by 10%-25%.

Description

technical field [0001] The invention relates to a fan with a large air volume and low power consumption, belonging to the fields of ventilation, air conditioning, refrigeration and heat pumps. Background technique [0002] In the fields of ventilation, air conditioning, refrigeration, and heat pumps, it is necessary to use a fan to make the gas flow and exchange heat between the flowing air and the refrigerant. It is the goal pursued by the industry to use the smallest possible fan power consumption to achieve the largest possible air volume. [0003] In the field of air-conditioning heat pumps, the air volume of the fan has a great relationship with the COP of the system. For example, in an outdoor heat exchanger under standard working conditions, the temperature difference between the inlet and outlet air is generally above 10°C. If the air volume can be increased by 50%, the temperature difference between the inlet and outlet air will be reduced by roughly 30%, and the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/28F04D29/30F04D29/32F04D29/38F04D29/44F04D29/66
CPCF04D29/281F04D29/30F04D29/325F04D29/386F04D29/441F04D29/666
Inventor 郏松筠
Owner 郏松筠