The invention relates to the field of purifiers, in particular to a light shield structure.
Due to the outbreak of viruses, the demand for air purifiers internally provided with an ultraviolet lamp is becoming ever urgent. In existing air purifiers, a filter screen made of PP or PET is not resistant to ultraviolet irradiation, and may be aged and covered with dust after being exposed to ultraviolet irradiation for a long time, thus doing harm to human health. In view of this, a light shield structure is additionally disposed between the filter screen and the ultraviolet lamp in the prior art. However, due to the fact that a large gap is reserved in the light shield structure to allow air to flow in smoothly, ultraviolet light cannot be completely shielded, and the filter screen may still be exposed to ultraviolet light. Or, in order to completely protect the filter screen against ultraviolet light, a small air inlet is reserved in the light shield structure, but the air input is small, so although the filter screen is completely shielded against ultraviolet light, the air input is greatly decreased, thus reducing the purification efficiency of the air purifier.
The technical issue to be settled by the invention is to provide a light shield structure that can protect a filter screen against ultraviolet irradiation under the precondition that the air input is guaranteed.
To settle the above technical issue, the technical solution adopted by the invention is as follows:
A light shield structure is disposed between an ultraviolet lamp and a filter screen of an air purifier, and comprises a first light shield element and a second light shield element;
The first light shield element is disposed on an inner wall of the second light shield element;
The second light shield element is provided with air inlets, the first light shield element is provided with air outlets, and the air inlets are staggered with the air outlets, so that the air outlets and the air inlets are completely blocked on at least one side in a radial direction; and an air inlet channel is formed between the first light shield element and the second light shield element.
Further, first guide slopes and second guide slopes are disposed on an outer wall of the first light shield element, and a first angle which is less than 180° is formed between the first guide slopes and sides, away from the second light shield element, of the second guide slopes.
Further, third guide slopes and fourth guide slopes are disposed on an outer wall of the second light shield element, and a second angle which is less than 180° is formed between the third guide slopes and sides, facing the first light shield element, of the fourth guide slopes.
Further, the first light shield element is arranged on one side of the air inlets and is centered in a circumferential direction.
Further, the light shield structure further comprises multiple third light shield elements;
The multiple third light shield elements are regularly disposed on the inner wall of the second light shield element, and an air outlet channel is formed between every two adjacent third light shield elements;
The air inlets and the air outlet channels opposite to the air inlets in the radial direction are communicated through the air inlet channel;
The first light shield element is arranged in the air inlet channel and is centered in the circumferential direction.
Further, a fifth guide slope and a sixth guide slope are disposed on an outer wall of each third light shield element, and a third angle which is less than 180° is formed between the fifth guide slope and a side, away from the second light shield element, of the sixth guide slope.
Further, the first light shield element and the second light shield element are formed integrally.
Further, the third light shield elements and the second light shield element are formed integrally.
The invention has the following beneficial effects: the first light shield element and the second light shield element are staggered to form the air inlet channel, so that the filter screen is protected against ultraviolet light under the precondition that air flows into the second light shield element smoothly, the service life of the filter screen is prolonged, and the filter screen will not be aged within a short time.
The technical contents, purposes and effects of the invention will be described in detail below in conjunction with embodiments and accompanying drawings.
As shown in
The first light shield element is disposed on an inner wall of the second light shield element;
The second light shield element is provided with air inlets; the first light shield element is staggered with the second light shield element, so that the first light shield element completely blocks the air inlets in a radial direction; and an air inlet channel is formed between the first light shield element and the second light shield element.
The working principle of the invention is as follows:
The first light shield element and the second light shield element are staggered, so that the air inlets are blocked by the first light shield element in the radial direction; and the air inlet channel is reserved, so that the air input is not decreased, and the filter screen is protected against ultraviolet light.
From the above description, the invention has the following beneficial effects: the first light shield element and the second light shield element are staggered to form the air inlet channel, so that the filter screen is protected against ultraviolet light under the precondition that air flows into the second light shield element smoothly, the service life of the filter screen is prolonged, and the filter screen will not be aged or covered with dust within a short time.
Further, multiple light shield bodies are disposed on an outer wall of the first light shield element, and an air outlet is formed between every two adjacent light shield bodies;
The air inlets and the corresponding air outlets are communicated through the air inlet channel.
From the above description, the light shield bodies are used to seal the air inlets, and the air outlets are formed between the adjacent light shield bodies and are communicated with the air inlets to form the air inlet channel, so that air can enter the air purifier smoothly and can be sterilized by the ultraviolet lamp.
Further, each light shield body comprises a first guide slope and a second guide slope, and a first angle which is less than 180° is formed between the first guide slope and a side, away from the second light shield element, of the second guide slope.
From the above description, the first guide slopes and the second guide slopes are arranged, and the first angle is formed between the first guide slopes and the second guide slopes, so that an air flow in the air inlet channel can be divided and guided to enter the air outlets along the first guide slopes and the second guide slopes, thus reducing the air intake resistance and ensuring the air intake efficiency.
Further, third guide slopes and fourth guide slopes are disposed on an outer wall of the second light shield element, and a second angle which is less than 180° is formed between the third guide slopes and sides, facing the first light shield element, of the fourth guide slopes.
From the above description, the third guide slopes and the fourth guide slopes are arranged, and the second angle is formed between the third guide slopes and the fourth guide slopes, so that an air flow in the air inlet channel can be divided and guided to enter the air inlets along the third guide slopes and the fourth guide slopes, thus reducing the air intake resistance and ensuring the air intake efficiency.
Further, multiple first light shield elements are regularly disposed on the inner wall of the second light shield element;
The first light shield element is arranged on one side of the air inlets and is centered in a circumferential direction.
From the above description, the multiple first light shield elements are arranged, and each first light shield element is centered, so that the light shield effect is guaranteed.
Further, the light shield structure further comprises multiple third light shield elements;
The multiple third light shield elements are regularly disposed on the inner wall of the second light shield element, and an air outlet channel is formed between every two adjacent third light shield elements;
The air inlets and the air outlet channels opposite to the air inlets in the radial direction are communicated through the air inlet channel;
The first light shield elements are arranged in the air inlet channel and are centered in the circumferential direction.
From the above description, the third light shield elements are arranged to seal gaps between the first light shield elements and the inner wall of the air inlet channel, so that ultraviolet light is completely shielded.
Further, a fifth guide slope and a sixth guide slope are disposed on an outer wall of each third light shield element, and a third angle which is less than 180° is formed between the fifth guide slope and a side, away from the second light shield element, of the sixth guide slope.
From the above description, the fifth guide slopes and the sixth guide slopes are arranged, and the third angle is formed between the fifth guide slopes and the sixth guide slopes, so that an air flow in the air inlet channel is divided and guided to enter the air outlet channels along the fifth guide slopes and the sixth guide slopes, thus reducing the air intake resistance and ensuring the air intake efficiency.
Further, the first light shield element and the second light shield element are formed integrally.
From the above description, the first light shield element and the second light shield element are formed integrally, so that the stability of the light shield structure is improved.
Further, the third light shield elements and the second light shield element are formed integrally.
From the above description, the third light shield elements and the second light shield element are formed integrally, so that the stability of the light shield structure is improved.
Referring to
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Preferably, the first light shield elements 3 and the second light shield element 4 are formed integrally.
Referring to
Referring to
Preferably, the first light shield elements 3 and the second light shield element 4 are formed integrally, and the third light shield elements 6 and the second light shield element 4 are formed integrally.
To sum up, three different light structures may be formed by the first light shield element, the second light shield element and the third light shield element, and under the precondition that the air inlet channel is reserved, light entering each air inlet may be shielded in the radial direction through the first light shield element and the second light shield element or through the first light shield element, the second light shield element and the third light shield elements, so that the filter screen is protected against ultraviolet light, and the service life of the filter screen is prolonged.
The above embodiments are merely illustrative ones of the invention, and are not intended to limit the patent scope of the invention. All equivalent transformations made according to the contents in the specification and drawings of the invention, or direct or indirect applications to other relating technical fields should also fall within the patent protection scope of the invention.
Number | Date | Country | Kind |
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202121886948.3 | Aug 2021 | CN | national |
The present application claims the benefit of Chinese Pat. App No. 2021218869483 filed on Aug. 12, 2021, the contents of which are incorporated herein by reference in their entirety.