JP-2026074536-A - Air purifier

Abstract

[Problem] To provide an air purifier that improves the air sterilization effect using deep ultraviolet light, prevents the device from becoming too large, and offers good maintainability. [Solution] The air purifier 1 has a fan unit 30 and an air purifying section 20 inside a casing 10. The lower surface of the casing 10 is provided with an intake port 10a for taking in indoor air and four outlets 10b for blowing out clean air in different directions. The air purifying section 20 has an irradiation chamber 23 composed of a light source 21 that irradiates deep ultraviolet light and a reflective section (reflector 22) that reflects the deep ultraviolet light. The fan unit 30 has a fan casing 31 built into the upper part of the casing 10, a multi-blade impeller 32 and a motor 33. The fan casing 31 is provided with an inlet 31a that communicates with the irradiation chamber 23 and four openings 31b that communicate with each of the outlets 10b. [Selection Diagram] Figure 3

Inventors

• 重松 拓也
• 占部 寿雄
• 黒川 郁史

Assignees

• 協立エアテック株式会社

Dates

Publication Date

20260507

Application Date

20241021

Claims (5)

1. An air purifier having a fan unit and an air purification unit inside a casing, The lower surface of the casing is provided with an intake port for taking in indoor air. Around the aforementioned intake port, four outlets are provided, each blowing out clean air in a different direction. The air purification unit comprises a light source that emits deep ultraviolet light and an irradiation chamber composed of a reflective section that reflects the deep ultraviolet light. The fan unit comprises a fan casing built into the upper part of the casing, a multi-blade impeller provided inside the fan casing, and a motor for driving the impeller. The fan casing is an air purifier provided with an inlet that communicates with the irradiation chamber and four openings that communicate with each of the aforementioned outlets.
2. The air purifying device according to claim 1, wherein the light source is provided below the irradiation chamber so as to irradiate toward the inlet side of the fan casing.
3. The air purifier according to claim 2, wherein the impeller is made of a material with high reflectivity to deep ultraviolet light emitted from the light source.
4. The air purifier according to any one of claims 1 to 3, wherein a light-shielding member made of a material with low reflectivity to deep ultraviolet light irradiated from the light source is provided near the intake port of the casing.
5. The air purifying device according to claim 4, wherein the light-shielding member comprises a first light-shielding member provided substantially vertically to surround the light source, and a second light-shielding member provided substantially vertically to surround the first light-shielding member.

Description

This invention relates to an air purification device that takes in indoor air and supplies sterilized (purified) air (clean air) to the room. In the field of air purification, technologies that use ultraviolet light of specific wavelengths to purify (sterilize) the air are known. In particular, ultraviolet light with wavelengths of 100 nm to 280 nm, known as deep ultraviolet light, is known to have a strong germicidal effect and can inactivate bacteria, fungi, viruses, and other microorganisms. However, deep ultraviolet light can cause inflammation and skin cancer if exposed directly to the skin, and direct visual inspection can cause cataracts, so caution is necessary when handling it. For this reason, there is a need for air purification devices that can use deep ultraviolet light while being safe to use, and such devices are described in Patent Document 1, for example. Patent Document 1 describes an antiviral air conditioner comprising a housing containing a blower fan, a heat exchanger, a filter, and an ultraviolet light source that emits light including ultraviolet light of a wavelength that inactivates viruses, and an air intake port located in front of (upstream of) the filter on the housing. The ultraviolet light source is located behind (downstream of) the filter. With this configuration, the antiviral air conditioner can inactivate viruses without directly irradiating the room with ultraviolet light of the wavelength that inactivates viruses. Japanese Patent Publication No. 2023-035282 This is a perspective view showing an embodiment of the air purifier of the present invention.Figure 1 is a bottom view of the air purifier shown in Figure 1.This is a cross-sectional view taken along line A-A in Figure 2.This is a cross-sectional view taken along line B-B in Figure 3.This is a cross-sectional view taken along line C-C in Figure 3.This diagram, based on Figure 3, illustrates the airflow within an air purifier.This diagram, based on Figure 4, illustrates the airflow within an air purifier.This diagram shows an air purifier blowing clean air horizontally.This diagram shows an air purifier blowing clean air vertically.This is a diagram illustrating another embodiment based on Figure 3. The embodiments of the present invention will be described in detail below, but the front-to-back, left-to-right, and up-and-down directions in this description are as shown in Figure 1. Furthermore, although there are specific regulations in the Pharmaceuticals and Medical Devices Act (Act on Securing Quality, Efficacy and Safety of Pharmaceuticals, Medical Devices, etc.), for convenience in this description, treatments that inactivate or kill bacteria, fungi, and viruses using deep ultraviolet light will be collectively referred to as sterilization (sterilization treatment, sterilization effect). [Air purifier] First, an air purifier 1 according to an embodiment of the present invention will be described with reference to Figures 1 to 5. The air purifier 1 is a device that takes in indoor air from an intake port 10a, disinfects it in an air purification unit 20, and blows out clean air from an outlet port 10b. The air purifier 1 has an air purification unit 20 and a fan unit 30 inside a casing (enclosure) 10 (see Figure 3). Furthermore, an intake port 10a for drawing in indoor air is provided on the lower surface of the casing 10. Specifically, a square-shaped pan member 11, smaller than the opening, is placed in a square-shaped opening on the lower surface of the casing 10, and the gaps on all four sides between the opening and the pan member 11 form the intake port 10a (see Figures 1 to 3). In this embodiment, four air outlets 10b are provided on the outer circumference of the intake port 10a, each blowing clean air in a different direction (front, back, left, and right) (see Figures 1 and 2). [Air Purification Unit] The air purification unit 20 has a light source 21 that emits deep ultraviolet light and an irradiation chamber 23 composed of a reflecting section that reflects the deep ultraviolet light (see Figure 3). A material with a high reflectivity for deep ultraviolet light is used for the reflecting section. In addition, a light source installation section 24 is positioned between the pan member 11 and the irradiation chamber 23. In this embodiment, multiple LED units 21U, each containing multiple LEDs 21a, are arranged in parallel on the light source mounting section 24 (see Figures 3 and 5). Therefore, the light source 21 is positioned between the pan member 11 and the irradiation chamber 23 (see Figure 3). The LEDs 21a are capable of emitting deep ultraviolet light with a wavelength of 280 nm, and the radiant flux of deep ultraviolet light per LED 21a in the LED unit 21U is 110 mW. Of course, as long as the light source 21 can emit deep ultraviolet light, there are no restrictions on its radiant flux, size, shape, or arrangement. Furthermore, in this embodiment, the reflective section is composed of aluminu