Search

JP-7855624-B2 - UV irradiation unit

JP7855624B2JP 7855624 B2JP7855624 B2JP 7855624B2JP-7855624-B2

Inventors

  • 小山 千佳
  • 齋藤 智己
  • 越山 達貴
  • 秋山 竜司

Assignees

  • ダイキン工業株式会社

Dates

Publication Date
20260508
Application Date
20240307
Priority Date
20230308

Claims (9)

  1. A flow channel forming member (51) in which a sterilization space (S) through which air flows is formed, An irradiation unit (60) is positioned at one end of the sterilization space (S) in a first direction and irradiates ultraviolet light toward the other end in the first direction, The sterilization space (S) is provided with a first reflecting unit (71) positioned on the other end side in the first direction, which reflects ultraviolet light irradiated from the irradiation unit (60) back to the one end side in the first direction, With respect to the optical axis of ultraviolet light from the irradiation unit (60), the optical axis of the reflected light from the first reflecting unit (71) is shifted by a first angle θ1 toward one end in a second direction perpendicular to the first direction. The first length of the sterilization space (S) in the first direction is greater than the second length of the sterilization space (S) in the second direction. The flow path forming member (51) is configured such that air flows from one side to the other in a third direction perpendicular to the first and second directions . In the third viewing direction, the first optical axis (A1) of ultraviolet light extending from the irradiation unit (60) reaches the first reflecting unit (71), In the third viewing direction, the second optical axis (A2) of the first reflected light extending from the first reflecting portion (71) does not overlap with the irradiation portion (60) and reaches the inner surface of one end of the sterilization space (S) in the first direction. UV irradiation unit.
  2. A flow channel forming member (51) in which a sterilization space (S) through which air flows is formed, An irradiation unit (60) is positioned at one end of the sterilization space (S) in a first direction and irradiates ultraviolet light toward the other end in the first direction, The sterilization space (S) includes a first reflecting unit (71) positioned on the other end side in the first direction, which reflects ultraviolet light irradiated from the irradiation unit (60) back to the one end side in the first direction, With respect to the optical axis of ultraviolet light from the irradiation unit (60), the optical axis of the reflected light from the first reflecting unit (71) is shifted by a first angle θ1 toward one end in a second direction perpendicular to the first direction. The first length of the sterilization space (S) in the first direction is greater than the second length of the sterilization space (S) in the second direction. The flow path forming member (51) is configured such that air flows from one side to the other in a third direction perpendicular to the first and second directions. The sterilization space (S) is provided with a second reflecting part (80) positioned at one end in the first direction, which reflects ultraviolet light irradiated from the first reflecting part (71) toward the other end in the first direction, With respect to the optical axis of the first reflecting part (71), the optical axis of the reflected light from the second reflecting part (80) is shifted by a second angle θ2 toward one end in the second direction. In the third viewing direction, the first optical axis (A1) of ultraviolet light extending from the irradiation unit (60) reaches the first reflecting unit (71), In the third viewing direction, the second optical axis (A2) of the first reflected light extending from the first reflecting portion (71) does not overlap with the irradiation portion (60) and reaches the second reflecting portion (80). <br/> Ultraviolet irradiation unit.
  3. The ultraviolet irradiation unit according to claim 1 or 2 , wherein the third length in the third direction in the sterilization space (S) is smaller than the first length and the second length.
  4. Let L be the distance in the second direction from the first surface (54), which is the inner surface of one end of the sterilization space (S), to the starting point P1 of the ultraviolet light from the irradiation unit (60), and let b be the distance in the second direction from the starting point P1 to the starting point P2 of the reflected light from the first reflecting unit (71). The ultraviolet irradiation unit according to claim 1, satisfying the relationship b ≤ L/2.
  5. Let L be the distance in the second direction from the first surface (54), which is the inner surface of one end of the sterilization space (S), to the starting point P1 of the ultraviolet light from the irradiation unit (60), and let a be the distance in the first direction from the starting point P1 to the starting point P2 of the reflected light from the first reflecting unit (71). The ultraviolet irradiation unit according to claim 1, satisfying the relationship: first angle θ1 < 2tan⁻¹ (L/2a).
  6. The ultraviolet irradiation unit according to claim 1 , wherein the first angle θ1 is 30 degrees or less.
  7. The ultraviolet irradiation unit according to claim 1 , wherein the ultraviolet reflectance of the first reflective portion (71) is 50% or more.
  8. An air conditioning system comprising the ultraviolet irradiation unit (50) according to claim 1 or 2.
  9. The air conditioning casing (30a) having an air passage (43) is formed, The air conditioning device according to claim 8, wherein the flow path forming member (51) is arranged in the air passage (43).

Description

This disclosure relates to an ultraviolet irradiation unit, an air conditioning system, and an air duct. The ultraviolet irradiation unit disclosed in Patent Document 1 comprises an ultraviolet light-emitting diode (UV light-emitting diode) that emits ultraviolet light and a reflecting unit that reflects the ultraviolet light emitted from the UV light-emitting diode. As shown in Figure 1 of the same document, the ultraviolet light emitted from the UV light-emitting diode is converted into parallel light and then reflected by the reflecting unit. The reflected ultraviolet light is sent to the UV light-emitting diode side along the optical axis of the parallel light. The ultraviolet light traveling back and forth between the UV light-emitting diode and the reflecting unit irradiates the air flowing between them, inactivating bacteria and viruses in the air. Japanese Patent Publication No. 2022-160292 Figure 1 is a piping diagram of an air conditioning system according to an embodiment.Figure 2 is a perspective view showing the exterior of the indoor unit.Figure 3 is a cross-sectional view showing the internal structure of the indoor unit.Figure 4 is a perspective view showing the configuration of the ultraviolet irradiation unit.Figure 5 is a plan view showing the internal structure of the ultraviolet irradiation unit.Figure 6 is a schematic diagram of the irradiation unit.Figure 7 is a schematic diagram of the irradiation unit according to modified example 1A.Figure 8 is a schematic diagram of the irradiation unit according to Modification 1B.Figure 9 is a plan view showing the internal structure of the ultraviolet irradiation unit in Modification 2.Figure 10 is a plan view showing the internal structure of the ultraviolet irradiation unit according to Modification 3.Figure 11 is a perspective view showing the configuration of the ultraviolet irradiation unit according to Modification 4.Figure 12 is a plan view showing the internal structure of the ultraviolet irradiation unit according to the modified example 5.Figure 13 is a plan view showing the internal structure of the ultraviolet irradiation unit according to modified example 6.Figure 14 is a plan view showing the internal structure of an ultraviolet irradiation unit according to one example of Modification 7.Figure 15 is a plan view showing the internal structure of an ultraviolet irradiation unit according to another example of Modification 7. The embodiments of this disclosure will be described in detail below with reference to the drawings. This disclosure is not limited to the embodiments shown below, and various modifications are possible without departing from the technical idea of this disclosure. Since the drawings are for conceptual illustration of this disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for ease of understanding. (1) Configuration of the air conditioning system The ultraviolet irradiation unit (50) of this disclosure is applied to the air conditioning system (10). The air conditioning system (10) harmonizes the air in the indoor space which is the target space. The air conditioning system (10) adjusts the temperature of the indoor air. (1-1) Overall Configuration As shown in Figure 1, the air conditioning system (10) has an outdoor unit (20), an indoor unit (30), a first connecting pipe (12), and a second connecting pipe (13). The air conditioning system (10) is a pair type having one outdoor unit (20) and one indoor unit (30). The first connecting pipe (12) is a gas connecting pipe, and the second connecting pipe (13) is a liquid connecting pipe. The outdoor unit (20) and the indoor unit (30) are connected to each other via the first connecting pipe (12) and the second connecting pipe (13) to form a refrigerant circuit (11). The refrigerant circuit (11) performs a refrigeration cycle by circulating a refrigerant. The refrigerant is, for example, difluoromethane. (1-2) Outdoor unit The outdoor unit (20) is installed outdoors. The outdoor unit (20) has an outdoor casing (20a), a compressor (21), an outdoor heat exchanger (22), an expansion valve (23), a four-way switching valve (24), and an outdoor fan (25). The outdoor casing (20a) houses the compressor (21), the outdoor heat exchanger (22), the expansion valve (23), the four-way switching valve (24), and the outdoor fan (25). The compressor (21) is a rotary compressor, such as an oscillating piston type, rotary type, or scroll type. The outdoor heat exchanger (22) is a fin-and-tube type. The four-way directional control valve (24) switches between a first state (shown by the solid line in Figure 1) and a second state (shown by the dashed line in Figure 1). In the first state, the four-way directional control valve (24) connects the discharge section of the compressor (21) to the gas end of the outdoor heat exchanger (22), and also connects the suction section of the compressor (21) to the first connecting pipe (12). In the second state,