Injection and suction type ventilator

Abstract

The invention discloses an injection-suction type ventilator, which is characterized in that a shrinkage injection orifice is arranged on an air outlet of a centrifugal or axial-flow type ventilator, and the shrinkage injection orifice is centrally arranged in front of a shrinkage type ventilation pipe of which the diameter is several times of that of the shrinkage injection orifice; air is jetted to the air inlet end of the contractive ventilation pipe from the contractive jet orifice at a high speed, surrounding air is sucked into the contractive ventilation pipe together, large air volume is driven by small air volume, and the efficiency of the ventilator is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of ventilation machinery, in particular to an ejection-suction type ventilator. Background Art

[0002] The mechanical structure of low-pressure fans is mainly divided into centrifugal and axial flow types. The efficiency of converting electrical energy into wind energy is generally around 50%-80%, depending on the different air volume and air pressure requirements of the products. For these two types of fans, even with the most optimized mechanical design, the efficiency cannot reach or exceed 100%. Summary of the invention

[0003] The present invention is a jet-suction fan, characterized in that: a contraction jet outlet is installed on the outlet of a centrifugal or axial flow fan, so that the air flow rate of the outlet of the centrifugal or axial flow fan is compressed and increased due to contraction, forming a concentrated jet airflow, and a contraction ventilation pipe with a diameter larger than that of the contraction jet outlet is installed in front of the contraction jet outlet;

[0004] Between the retractable jet air outlet and the retractable ventilation pipe, there is a bracket for centrally fixing the retractable jet air outlet to the air inlet end of the retractable ventilation pipe;

[0005] The center of the bracket is a tubular ring for fixing the ventilator with a retractable jet air outlet, and the tubular ring is provided with screws for fixing.

[0006] The present invention provides a suction-ejection ventilator that uses a central jet airflow with increased pressure and speed to shoot toward a contraction ventilation duct, thereby attracting and driving nearly ten times the air around the air inlet end of the contraction ventilation duct to flow toward the contraction ventilation duct, so that the efficiency of converting the electrical energy of the low-pressure ventilator into wind energy reaches or exceeds 100%, thereby reducing the power consumption of the low-pressure ventilator and achieving the effect of saving electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The present invention will be specifically described by way of embodiments and with reference to the accompanying drawings, in which:

[0008] Figure 1 It is a side half-section view of a jet-suction fan of the present invention.

[0009] Figure 2 It is a front view of a jet-suction ventilator of the present invention. DETAILED DESCRIPTION

[0010] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The specific embodiments described below are only used to explain the present invention rather than to limit the present invention.

[0011] Figure 1 It is a side half view of a jet-suction fan of the present invention, in which 1 is a centrifugal or axial flow fan, 2 is a jet air inlet, 3 is a contraction jet air outlet, 4 is a contraction ventilation pipe, 5 is a fixed bracket, 6 is a tubular ring, 7 is a jet-suction air inlet, and 8 is an jet-suction fan outlet.

[0012] This jet-suction ventilator has two air inlets, the jet air inlet 2 and the jet-suction air inlet 7, so it has some unique uses:

[0013] 1. In the bathroom, the odor mainly comes from the toilet. Connect the jet air inlet 2 of the jet suction ventilator to the toilet lid with a pipe to directly remove the odor; the jet suction air inlet 7 can also remove the odor leaked into the bathroom space.

[0014] 2. In traditional Chinese medicine moxibustion smoke exhaust, the jet air inlet 2 is directly connected to the top of the moxibustion stick with a hose to exhaust the moxibustion smoke, and the jet suction air inlet 7 can also exhaust other smoke in the indoor space.

[0015] 3. When used in the kitchen, the jet air inlet 2 can be connected to the air outlet of the range hood with a pipe, the exhaust fan of the range hood can be stopped, and the oil smoke can be directly sucked out. The jet suction air inlet 7 can exhaust the oil smoke in other spaces in the kitchen outside the range hood.

[0016] 4. In certain key polluted areas in industrial plants, such as electric welding, painting, grinding, etc., the jet air inlet 2 can be connected to this area with a pipe to directly remove these key polluted fumes, and the suction air inlet 7 can remove other fumes in the plant space.

[0017] Therefore, this type of ejector fan can also be used in other places that require both main exhaust ventilation and secondary exhaust ventilation.

Claims

1. A jet-suction fan, characterized in that: A contraction jet air outlet is installed on the air outlet of a centrifugal or axial flow fan, and a contraction ventilation pipe with a diameter larger than that of the contraction jet air outlet is installed in front of the contraction jet air outlet.

2. The jet-suction fan according to claim 1, characterized in that: Between the retractable jet air outlet and the retractable ventilation pipe, there is a bracket for centrally fixing the retractable jet air outlet to the air inlet end of the retractable ventilation pipe.

3. The jet-suction fan according to claim 2, characterized in that: At the center of this bracket is a tubular ring that fixes the ventilator with a retractable jet outlet, and there are screws on this tubular ring for fixing.

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