JP6656785B1 - Ultraviolet irradiation apparatus for heat exchanger in air conditioner and cleaning method using the same - Google Patents
Ultraviolet irradiation apparatus for heat exchanger in air conditioner and cleaning method using the same Download PDFInfo
- Publication number
- JP6656785B1 JP6656785B1 JP2019152651A JP2019152651A JP6656785B1 JP 6656785 B1 JP6656785 B1 JP 6656785B1 JP 2019152651 A JP2019152651 A JP 2019152651A JP 2019152651 A JP2019152651 A JP 2019152651A JP 6656785 B1 JP6656785 B1 JP 6656785B1
- Authority
- JP
- Japan
- Prior art keywords
- ultraviolet
- heat exchanger
- ultraviolet irradiation
- irradiation device
- ultraviolet lamp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 16
- 238000004140 cleaning Methods 0.000 title claims description 15
- 230000006866 deterioration Effects 0.000 claims abstract description 15
- 230000001678 irradiating effect Effects 0.000 claims abstract description 15
- 239000012530 fluid Substances 0.000 claims abstract description 14
- 230000014509 gene expression Effects 0.000 claims description 27
- 238000009434 installation Methods 0.000 claims description 26
- 238000005192 partition Methods 0.000 claims description 2
- 241000894006 Bacteria Species 0.000 abstract description 12
- 239000000428 dust Substances 0.000 abstract description 11
- 238000010586 diagram Methods 0.000 abstract description 4
- 239000003507 refrigerant Substances 0.000 description 12
- 238000004378 air conditioning Methods 0.000 description 11
- 230000007423 decrease Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- 238000011088 calibration curve Methods 0.000 description 2
- 208000015181 infectious disease Diseases 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000019645 odor Nutrition 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035943 smell Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
Landscapes
- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
Abstract
【課題】空気調和機内の熱交換器に紫外線を照射することにより、塵埃の除去及び雑菌の繁殖抑制を効率的に行う紫外線照射装置を提供する。【解決手段】紫外線照射装置３は、熱交換器の一次側又は二次側或いは両側に設置され、かつ、開口部３１ａを備えた筐体３１と、筐体３１内に配置されかつ開口部３１ａから紫外線を照射可能な紫外線ランプ３３とを備える。紫外線ランプ３３は、紫外線照射強度の劣化に応じて、該ランプ３３と熱交換器との距離を縮めるよう移動可能である。紫外線ランプ３３の背面、上面又は下面には反射板がさらに形成されることが好ましい。開口部３１ａを区画する筐体３１の端部側には、流体抵抗低減用のバッフル板３８がさらに形成されることが好ましい。筐体３１には、開口部３１ａが設置された一端と逆の他端に流体抵抗低減用のフェアリングカバー３２がさらに形成されることが好ましい。【選択図】図２PROBLEM TO BE SOLVED: To provide an ultraviolet irradiation device that efficiently removes dust and suppresses propagation of various bacteria by irradiating a heat exchanger in an air conditioner with ultraviolet rays. An ultraviolet irradiation device (3) is installed on a primary side, a secondary side or both sides of a heat exchanger, and has a casing (31) having an opening (31a), and an opening (31a) arranged in the casing (31). And an ultraviolet lamp 33 capable of irradiating ultraviolet rays. The ultraviolet lamp 33 is movable so as to reduce the distance between the lamp 33 and the heat exchanger depending on the deterioration of the ultraviolet irradiation intensity. It is preferable that a reflective plate is further formed on the back surface, the upper surface, or the lower surface of the ultraviolet lamp 33. It is preferable that a baffle plate 38 for reducing fluid resistance is further formed on the end side of the housing 31 that defines the opening 31a. It is preferable that a fairing cover 32 for reducing fluid resistance is further formed on the housing 31 at the other end opposite to the one end where the opening 31a is installed. [Selection diagram] FIG.
Description
本発明は、空気調和機内の熱交換器用の紫外線照射装置及びこれを用いた清掃方法に関するものである。 The present invention relates to a cleaning method using the ultraviolet irradiation apparatus and its heat exchanger of an air conditioner machine.
病院や学校などの大型施設には、空気調和機と呼ばれる設備が設置される。この空気調和機は、病室等の各居住空間から空気を回収して加温又は冷却し、この温度調整された空気を各居住空間へ送出するため、施設内の空調設備における中央管理ユニット（一極熱制御ユニット）として機能する。 Large facilities such as hospitals and schools are equipped with equipment called air conditioners. This air conditioner collects air from each living space such as a hospital room, heats or cools it, and sends out the temperature-adjusted air to each living space. Function as an extreme heat control unit).
空気調和機内には熱交換器が設けられ、この熱交換器は、通常、冷水又は温水が通過するチューブ（冷媒管）と、チューブ外周に設けられたフィンとで構成される。この熱交換器には各居住空間から空気が大量に送り込まれるため、空気調和機の使用を継続していると、熱交換器周囲には多量の塵埃が付着する。 A heat exchanger is provided in the air conditioner, and the heat exchanger is generally constituted by a tube (refrigerant tube) through which cold or hot water passes, and fins provided on the outer periphery of the tube. Since a large amount of air is sent from each living space to this heat exchanger, a large amount of dust adheres around the heat exchanger when the air conditioner is continuously used.
（問題１．塵埃付着による熱交換器での雑菌の発生・繁殖）
これらの塵埃は、コイル周囲の湿気を含むことにより、雑菌の発生・繁殖の温床となる。これらの雑菌は、悪臭を生み出すだけでなく、空気や塵埃とともに空気調和機から各居住空間へ移動するため、このような雑菌は院内集団感染の一因と考えられており、雑菌や臭気の除去・抑制を含めた空気環境対策は切実な課題である。
(Problem 1. Generation and propagation of various bacteria in heat exchangers due to dust adhesion)
These dusts serve as a hotbed for the generation and propagation of various bacteria by including moisture around the coils. These bacteria not only produce bad smells, but also move from the air conditioner to each living space together with air and dust, so such bacteria are considered to be one of the causes of hospital-acquired outbreaks.・ Air environment measures including suppression are urgent issues.
（問題２．塵埃付着による熱交換器での流体の圧力損失の増加）
また、各居住空間から回収され、流路の狭い熱交換器を流れる気体の流速は大きい。この熱交換器への塵埃の付着量が多くなると、熱交換器の流路の一部又は全部が目詰まりを起こし、熱交換器周りの流路の圧力損失が増加してしまう。
(Problem 2. Increasing pressure loss of fluid in heat exchanger due to dust adhesion)
In addition, the flow velocity of the gas recovered from each living space and flowing through the heat exchanger having a narrow flow path is large. When the amount of dust attached to the heat exchanger increases, a part or all of the flow path of the heat exchanger is clogged, and the pressure loss in the flow path around the heat exchanger increases.
なお、雑菌を除去するために、紫外線をコイル面に照射することにより、雑菌等の繁殖を抑制できることが既に提案されている（例えば、特許文献１〜５を参照）。 In addition, it has already been proposed that by irradiating the coil surface with ultraviolet rays in order to remove various bacteria, the propagation of various bacteria can be suppressed (for example, see Patent Documents 1 to 5).
（問題３．継続使用による紫外線ランプの強度低下）
しかしながら、紫外線ランプは、継続的な使用により、熱交換器へ照射される紫外線強度は大幅に劣化することが判っている。このため、紫外線ランプを備えた紫外線照射装置は、その継続使用により、雑菌の不活化や塵埃の分解が期待どおりに行えなくなることが懸念される。したがって、紫外線ランプの使用時間に応じた紫外線の強度低下を見越したうえで、紫外線照射装置の所期の目的が達成されるように措置しておくことが望まれる。
(Problem 3. Intensity of UV lamp is reduced by continuous use)
However, it has been found that the intensity of the ultraviolet light irradiated to the heat exchanger is significantly deteriorated by the continuous use of the ultraviolet lamp. For this reason, there is a concern that an ultraviolet irradiation device equipped with an ultraviolet lamp may not be able to inactivate various bacteria and decompose dust as expected due to its continuous use. Therefore, it is desirable to take measures to achieve the intended purpose of the ultraviolet irradiation device, while anticipating a decrease in the intensity of ultraviolet light according to the usage time of the ultraviolet lamp.
（問題４．紫外線照射装置の設置（追加）による流体抵抗及び圧力損失の増加）
上述した問題２は、熱交換器に隣接して上記紫外線照射装置を設置することで解決することができる。しかしながら、有形の紫外線照射装置の追加設置によって熱交換器周辺の流路の圧力損失が増加してしまったら、これによって上記問題２を解決した意味が無い。従って、圧力損失が極力増加しないように、紫外線照射装置を設計し、空気調和機内へ設置する必要がある。
(Problem 4. Increase in fluid resistance and pressure loss due to installation (addition) of ultraviolet irradiation device)
The above problem 2 can be solved by installing the ultraviolet irradiation device adjacent to the heat exchanger. However, if the additional installation of the tangible ultraviolet irradiation device increases the pressure loss in the flow path around the heat exchanger, there is no point in solving the above problem 2. Therefore, it is necessary to design the ultraviolet irradiation device and install it in the air conditioner so that the pressure loss does not increase as much as possible.
（問題５．紫外線照射装置の設置位置への制約）
また、本発明の紫外線照射装置を、既存の空気調和機へ組み込むことを想定する。各現場（病院等の各施設）においては、空気調和機の仕様・構造や熱交換器の据付状態等は種々異なっていることが多い。これにより、現場毎に紫外線照射装置の追設位置に異なる制約が生じる。例えば、現場での据付上の制約から、熱交換器に対して風上側（一次側）ではなく、風下側（二次側）の方に紫外線照射装置を追設せねばならない場合もあり得る。従って、どちらの側に紫外線照射装置が置かれた場合でも、組み込み後の熱交換器の流路全体の圧力損失を増加させないことも望まれる。
(Problem 5. Restrictions on the installation position of the ultraviolet irradiation device)
Further, it is assumed that the ultraviolet irradiation device of the present invention is incorporated into an existing air conditioner. At each site (each facility such as a hospital), the specifications and structure of the air conditioner, the installation state of the heat exchanger, and the like are often different. This places different restrictions on the additional position of the ultraviolet irradiation device for each site. For example, due to installation restrictions at the site, it may be necessary to additionally install an ultraviolet irradiation device not on the windward side (primary side) but on the leeward side (secondary side) of the heat exchanger. Therefore, it is also desired that the pressure loss of the entire flow path of the heat exchanger after being assembled is not increased regardless of which side the ultraviolet irradiation device is placed.
（本発明の目的）
本発明は、このような事情に鑑みてなされたものであり、空気調和機内の熱交換器へ紫外線を照射することにより、臭気・塵埃の除去及び雑菌の繁殖抑制を効率的に行う紫外線照射装置を提供することを目的とする。
(Object of the present invention)
The present invention has been made in view of such circumstances, and by irradiating ultraviolet rays to a heat exchanger in an air conditioner, an ultraviolet irradiation apparatus that efficiently removes odors and dusts and suppresses the propagation of various bacteria. The purpose is to provide.
また、本発明の別の目的は、熱交換器に紫外線を照射することにより塵埃を除去する等して熱交換器周囲の空気の流体抵抗を抑制できる紫外線照射装置を提供することである。 Another object of the present invention is to provide an ultraviolet irradiation device that can suppress the fluid resistance of air around the heat exchanger by removing dust by irradiating the heat exchanger with ultraviolet light .
また、本発明の別の目的は、紫外線ランプの継続使用により発光強度が段階的に低下しても、熱交換器に照射される紫外線強度を一定に保つことができる紫外線照射装置及びこれを用いた熱交換器の清掃方法を提供することである。 Another object of the present invention is to provide an ultraviolet irradiation apparatus capable of maintaining a constant intensity of ultraviolet light applied to a heat exchanger even if the light emission intensity is reduced step by step by using an ultraviolet lamp continuously, and using the same. It is to provide a method of cleaning the heat exchanger.
また、本発明の別の目的は、空気調和機内に組み込んだ際に熱交換器の流路全体の圧力損失が増加しないように、流路抵抗の小さいフォルムを有した紫外線照射装置を提供することである。 Another object of the present invention is to provide an ultraviolet irradiation device having a form with a small flow path resistance so that the pressure loss of the entire flow path of the heat exchanger does not increase when incorporated into an air conditioner. It is.
また、本発明の別の目的は、熱交換器の風上側（一次側）でも風下側（二次側）でも設置可能であり、かつ、どちらの側に設置されても熱交換器の流路全体の圧力損失を増加させることの無いフォルムを有した紫外線照射装置を提供することである。 Further, another object of the present invention is that the heat exchanger can be installed on the leeward side (primary side) or the leeward side (secondary side) of the heat exchanger. An object of the present invention is to provide an ultraviolet irradiation device having a form that does not increase the overall pressure loss.
本発明者らは、鋭意検討の末、上述の問題点を見事に解決する装置及び方法を見出し、本発明を完成した。 After diligent studies, the present inventors have found an apparatus and a method for solving the above-described problems, and have completed the present invention.
すなわち本発明は、例えば、以下の構成・特徴を備えるものである。
（態様１）
空気調和機内の熱交換器の表面に紫外線を照射可能な紫外線照射装置であって、
前記紫外線照射装置は前記熱交換器の風向一次側又は風向二次側或いは両側に設置され、
前記紫外線照射装置は、開口部を備えた筐体と、前記筐体内に配置されかつ前記開口部から紫外線を前記熱交換器の前記表面に向けて照射可能な紫外線ランプと、を備え、
前記紫外線ランプは、紫外線照射強度の劣化に応じて、該紫外線ランプと前記熱交換器との距離を縮めるよう移動可能である、
ことを特徴とする紫外線照射装置。
（態様２）
前記紫外線ランプの背面、上面又は下面には反射板がさらに形成される、
ことを特徴とする態様１に記載の紫外線照射装置。
（態様３）
前記背面に形成された前記反射板は、前記紫外線ランプに対して凹凸形状を成す、
ことを特徴とする態様２に記載の紫外線照射装置。
（態様４）
前記開口部を区画する前記筐体の端部側には、流体抵抗低減用のバッフル板がさらに形成され、かつ、前記バッフル板は前記開口部の開口面積を徐々に縮小するように前記開口部の先端に向かって窄まった形状を成す、
ことを特徴とする態様１〜３のいずれかに記載の紫外線照射装置。
（態様５）
前記筐体には、前記開口部が設置された一端と逆の他端に流体抵抗低減用のフェアリングカバーがさらに形成される、
ことを特徴とする態様１〜４のいずれかに記載の紫外線照射装置。
（態様６）
態様１〜５のいずれかに記載の紫外線照射装置を用いて空気調和機内の熱交換器に紫外線を照射して該熱交換器を清掃するための清掃方法であって、
前記紫外線照射装置へ設置する前記紫外線ランプと同型の製品を用いて、前記紫外線ランプの使用時間と、前記熱交換器の表面での照射強度との関係式Ｆ１を導出する工程と、
前記紫外線ランプと前記熱交換器の表面との間の距離と、前記表面での紫外線照射強度との関係式Ｆ２を導出する工程と、
前記関係式Ｆ１，Ｆ２から、前記熱交換器の前記表面での紫外線照射強度を一定に保つため、前記使用時間と、前記紫外線ランプの移動位置との関係式Ｆ３を導出する工程と、
前記熱交換器の一次側又は二次側或いは両側に前記紫外線照射装置を設置し、前記紫外線ランプを、前記関係式Ｆ３で得られた初期位置Ｘ（ｔ＝０）に固定する工程と、
前記紫外線ランプを発光させ、前記熱交換器の前記表面へ紫外線を照射する工程と、
前記紫外線照射装置の前記使用時間が所定時間ｔの経過したときに、この時間ｔに対応した分、前記紫外線ランプを前記熱交換器側に近づくように移動し、前記関係式Ｆ３から得られた前記紫外線ランプの設置位置Ｘ（ｔ）にて移動・固定する工程と、
を含むことを特徴とする清掃方法。
That is, the present invention has, for example, the following configurations and features.
(Aspect 1)
An ultraviolet irradiation device capable of irradiating the surface of the heat exchanger in the air conditioner with ultraviolet light ,
The ultraviolet irradiation device is installed in the wind direction the primary side or wind the secondary side or both sides of the front Stories heat exchanger,
The ultraviolet irradiation device includes a housing having an opening, and an ultraviolet lamp disposed in the housing and capable of irradiating ultraviolet light from the opening toward the surface of the heat exchanger,
The ultraviolet lamp is movable to reduce a distance between the ultraviolet lamp and the heat exchanger in accordance with a deterioration in ultraviolet irradiation intensity.
An ultraviolet irradiation device, characterized in that:
(Aspect 2)
A reflection plate is further formed on the back surface, the top surface, or the bottom surface of the ultraviolet lamp,
The ultraviolet irradiation device according to aspect 1, characterized in that:
(Aspect 3)
The reflection plate formed on the back surface has an uneven shape with respect to the ultraviolet lamp,
The ultraviolet irradiation device according to aspect 2, characterized in that:
(Aspect 4)
A baffle plate for reducing fluid resistance is further formed on an end side of the housing that partitions the opening, and the baffle plate is configured such that the baffle plate gradually reduces the opening area of the opening. The shape narrows toward the tip of the
The ultraviolet irradiation device according to any one of aspects 1 to 3, characterized in that:
(Aspect 5)
In the housing, a fairing cover for reducing fluid resistance is further formed at the other end opposite to the one end where the opening is installed,
The ultraviolet irradiation device according to any one of aspects 1 to 4, wherein:
(Aspect 6)
A cleaning method for irradiating a heat exchanger in an air conditioner with ultraviolet rays using the ultraviolet irradiation apparatus according to any one of aspects 1 to 5 to clean the heat exchanger ,
Using a product of the same type as the ultraviolet lamp to be installed in the ultraviolet irradiation device, deriving a relational expression F1 between the usage time of the ultraviolet lamp and the irradiation intensity on the surface of the heat exchanger;
Deriving a relational expression F2 between a distance between the ultraviolet lamp and the surface of the heat exchanger and an ultraviolet irradiation intensity on the surface;
Deriving, from the relational expressions F1 and F2, a relational expression F3 between the use time and the movement position of the ultraviolet lamp in order to keep the ultraviolet irradiation intensity on the surface of the heat exchanger constant;
Installing the ultraviolet irradiation device on the primary side or the secondary side or both sides of the heat exchanger, and fixing the ultraviolet lamp at an initial position X (t = 0) obtained by the relational expression F3;
Illuminating the ultraviolet lamp, and irradiating the surface of the heat exchanger with ultraviolet light,
When the usage time of the ultraviolet irradiation device has passed a predetermined time t, the ultraviolet lamp is moved closer to the heat exchanger by an amount corresponding to the time t, and the ultraviolet lamp is obtained from the relational expression F3. Moving and fixing at the installation position X (t) of the ultraviolet lamp;
A cleaning method comprising:
本発明の紫外線照射装置は、以上のような構成を有するため、熱交換器へ紫外線照射を施すことにより、院内集団感染の一因ともなる塵埃や雑菌を分解・除去することが可能であり、かつ、熱交換器周りの流路における流体の圧力損失を増加させることなく空気調和機内に組み込み可能である。 Since the ultraviolet irradiation device of the present invention has the above configuration, by applying ultraviolet irradiation to the heat exchanger, it is possible to decompose and remove dust and various bacteria that contribute to in-hospital group infection, Moreover, it can be incorporated in the air conditioner without increasing the pressure loss of the fluid in the flow path around the heat exchanger.
本発明の紫外線照射装置は、以上のような構成を有するため、紫外線ランプの継続使用により発光強度が段階的に低下しても、熱交換器の表面に照射される紫外線強度を一定に保つことができる。 Since the ultraviolet irradiation device of the present invention has the above-described configuration, the intensity of the ultraviolet light applied to the surface of the heat exchanger is kept constant even if the emission intensity is reduced step by step by using the ultraviolet lamp continuously. Can be.
また、本発明の紫外線照射装置は、以上のような構成を有するため、熱交換器の風上側でも風下側でも設置可能であり、かつ、どちらの側に設置されても熱交換器の流路全体の圧力損失を増加させることが無い。 Further, since the ultraviolet irradiation device of the present invention has the above configuration, it can be installed on the leeward or leeward side of the heat exchanger, and the flow path of the heat exchanger can be installed on either side. Does not increase overall pressure loss.
また、本発明の紫外線照射装置を用いた熱交換器の清掃方法によれば、装置内で使用される同種の紫外線ランプについて、使用時間と照射強度との関係式Ｆ１（校正曲線）と、ランプ設置位置（移動距離）と照射強度との関係式Ｆ２（校正曲線）と、を求めた上で、使用時間とランプ移動距離との関係式Ｆ３を予め導出しておく。熱交換器の一次側又は二次側に設置された紫外線照射装置を稼働させた後は、予め導出された上記関係式Ｆ３を用いて、定期的に使用時間（照射時間）に応じた分、紫外線ランプと熱交換器との距離を縮めるように紫外線ランプを所定距離だけ移動・固定する。これらの操作を行うことで、紫外線ランプの継続使用により発光強度が段階的に低下しても、熱交換器の表面に照射される紫外線強度を一定に保つことができるのである。 Further, according to the method of cleaning a heat exchanger using the ultraviolet irradiation device of the present invention, for the same type of ultraviolet lamp used in the device, the relational expression F1 (calibration curve) between usage time and irradiation intensity, and the lamp After obtaining a relational expression F2 (calibration curve) between the installation position (moving distance) and the irradiation intensity, a relational expression F3 between the use time and the lamp moving distance is derived in advance. After operating the ultraviolet irradiation device installed on the primary side or the secondary side of the heat exchanger, using the relational expression F3 derived in advance, periodically using an amount corresponding to the usage time (irradiation time), The ultraviolet lamp is moved and fixed by a predetermined distance so as to shorten the distance between the ultraviolet lamp and the heat exchanger. By performing these operations, the intensity of the ultraviolet light applied to the surface of the heat exchanger can be kept constant even if the emission intensity decreases stepwise due to the continuous use of the ultraviolet lamp.
以下、添付の図面を参照しながら下記の具体的な実施形態に基づき本発明の技術的内容を説明するが、本発明はこれらの実施形態に何等限定されるものではない。 Hereinafter, the technical contents of the present invention will be described based on the following specific embodiments with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
（空気調和機及びこれを含んだ施設内空調システムの概要）
図１に、本発明の空気調和機１及びこれを含んだ施設内空調システム１０の概要を示す。空気調和機１は、ファン２と、紫外線照射装置３を備えた熱交換器４と、を備える。ファン２は、空気調和機１で調整された空気を取り込み、空気調和機１と居住空間５とを接続する往路ダクト６内へ空気を送風する。往路ダクト６内の空気は、居住空間５の天井に通常設置された吹出口５１から居住空間５へ流入し、吸込口５２から復路ダクト７へ送り出される。復路ダクト７は、各居住空間から回収された空気を集めて空気調和機１に戻す。
(Outline of the air conditioner and the air conditioning system in the facility including it)
FIG. 1 shows an outline of an air conditioner 1 of the present invention and an in-facility air conditioning system 10 including the same. The air conditioner 1 includes a fan 2 and a heat exchanger 4 including an ultraviolet irradiation device 3. The fan 2 takes in the air adjusted by the air conditioner 1 and blows the air into an outward duct 6 connecting the air conditioner 1 and the living space 5. The air in the outward duct 6 flows into the living space 5 from an outlet 51 normally installed on the ceiling of the living space 5, and is sent out from the suction port 52 to the return duct 7. The return duct 7 collects the air collected from each living space and returns the collected air to the air conditioner 1.
（熱交換器の構成）
熱交換器４は、冷媒管及びフィンを備えた公知の熱交換器の構成を前提とする。ここで、冷媒管４２ａ，４２ｂは、熱交換器本体４１と、空調熱源機器４３とを接続する。空調熱源機器４３にて温度調整された冷媒は、冷媒管（第１冷媒管）４２ａ内を通過しながら、熱交換器本体４１へと送られ、熱交換器本体４１周りの空気と熱交換（熱の授受）を行い、冷媒管（第２冷媒管）４２ｂ内を通過して再度、空調熱源機器４３に戻される。その際に、冷温水ポンプ４４によって冷媒は加圧される。
(Composition of heat exchanger)
The heat exchanger 4 is based on the configuration of a known heat exchanger including a refrigerant tube and fins. Here, the refrigerant pipes 42a and 42b connect the heat exchanger body 41 and the air conditioning heat source device 43. The refrigerant whose temperature has been adjusted by the air conditioning heat source device 43 is sent to the heat exchanger main body 41 while passing through the refrigerant pipe (first refrigerant pipe) 42a, and exchanges heat with the air around the heat exchanger main body 41 ( (The transfer of heat) is performed, and the refrigerant passes through the refrigerant pipe (second refrigerant pipe) 42b and is returned to the air conditioning heat source device 43 again. At that time, the refrigerant is pressurized by the cold / hot water pump 44.
（紫外線照射装置の概要）
次に、図２（ａ）及び（ｂ）を参照しながら、本発明のユニークな紫外線照射装置３について詳しく説明する。紫外線照射装置３は、中空立方体状の筐体３１と、鋼板を折り曲げたフェアリングカバー３２とを有する。この筐体３１の一方側（前方側）は、開口部３１ａが設けられいるため解放しているが、他方側（後方側）は、背面板３１ｂが存在するため閉じている。つまり、組付け状態では開口部３１ａが開口し、筐体３１の内部が露見した状態となる。なお、開口部３１ａの周囲に、後述するバッフル板３８を形成してもよい。
(Outline of UV irradiation device)
Next, the unique ultraviolet irradiation device 3 of the present invention will be described in detail with reference to FIGS. 2 (a) and 2 (b). The ultraviolet irradiation device 3 includes a hollow cubic casing 31 and a fairing cover 32 formed by bending a steel plate. One side (front side) of the housing 31 is open because an opening 31a is provided, but the other side (rear side) is closed due to the presence of the back plate 31b. That is, in the assembled state, the opening 31a is opened, and the inside of the housing 31 is exposed. A baffle plate 38 described later may be formed around the opening 31a.
（筐体の構造）
筐体３１の開口部３１ａは、４つの板（詳しくは、上板３１ｃ、下板３１ｄ、第１側板３１ｅ、第２側板３１ｆ）によって区画されている。これらの４つの板３１ｃ〜３１ｆは金属製であることが好ましい。なお、第１・第２側板３１ｅ，３１ｆには開口部３１ａから後方に向かって水平に延びたスロット３１ｇが設けられる。なお、図示した左右のスロット３１ｇは、互いに同一の幅と長さを有し、同一の高さ（筐体３１の約半分の高さ）位置に設置されているが、必ずしも図示の構成に限定されない。
(Case structure)
The opening 31a of the housing 31 is partitioned by four plates (specifically, an upper plate 31c, a lower plate 31d, a first side plate 31e, and a second side plate 31f). These four plates 31c to 31f are preferably made of metal. The first and second side plates 31e and 31f are provided with slots 31g extending horizontally from the opening 31a toward the rear. The illustrated left and right slots 31g have the same width and length as each other and are installed at the same height (about half the height of the housing 31), but are not necessarily limited to the illustrated configuration. Not done.
（フェアリングカバーと筐体との接続）
フェアリングカバー３２には、両端に水平に延びた縁部３２ａが形成されており、これらの縁部３２ａが、筐体３１の上板３１ｃと下板３１ｄの一部（後方部分）と重なった状態で面接触し、これらの一部に固定されている。これにより、フェアリングカバー３２は筐体３１の後方に一体的に取り付けられる。
(Connection between the fairing cover and the housing)
In the fairing cover 32, horizontally extending edges 32a are formed at both ends, and these edges 32a overlap with a part (rear part) of the upper plate 31c and the lower plate 31d of the housing 31. They are in surface contact with each other and are fixed to some of them. Thus, the fairing cover 32 is integrally attached to the rear of the housing 31.
また、フェアリングカバー３２は上側傾斜板３２ｂと下側傾斜板３２ｃとを備える。これらの傾斜板３２ｂ，３２ｃは、筐体３１から後方に向かって内部空間の断面積を徐々に小さくするように傾斜しており、筐体３１の半分の高さ位置で、傾斜板３２ｂ，３２ｃの各後端同士が接続してカバー終端線３２ｄを形成する。このように筐体３１の後側に取り付けられたフェアリングカバー３２は、筐体３１周りの流体抵抗を低減するよう作用する。 The fairing cover 32 includes an upper inclined plate 32b and a lower inclined plate 32c. These inclined plates 32b, 32c are inclined so as to gradually reduce the cross-sectional area of the internal space from the housing 31 toward the rear, and at half height of the housing 31, the inclined plates 32b, 32c are provided. Are connected to each other to form a cover termination line 32d. Thus, the fairing cover 32 attached to the rear side of the housing 31 acts to reduce the fluid resistance around the housing 31.
（紫外線ランプ及びその周辺装置の構造）
筐体３１の内部には、図２（ａ）及び図３（ａ）に示すように、紫外線ランプ３３と、この紫外線ランプ３３を水平に保持可能なランプ保持具３４とが搭載されている。また、ランプ保持具３４の前面や筐体３１の上板３１ｃ、下板３１ｄの内面には、紫外線ランプ３３から出射された紫外線を反射させる反射板３５が設置されていてもよい。以上の構成の紫外線ランプ３３から出射された定格波長（例えば、２５４ｎｍ）を有した紫外線は、直接的に又は反射板３５等に反射・屈折した後に、開口部３１ａを通過して外側に向けて照射される。
(Structure of UV lamp and its peripheral devices)
As shown in FIGS. 2A and 3A, an ultraviolet lamp 33 and a lamp holder 34 capable of horizontally holding the ultraviolet lamp 33 are mounted inside the housing 31. Further, a reflecting plate 35 that reflects ultraviolet light emitted from the ultraviolet lamp 33 may be provided on the front surface of the lamp holder 34 and on the inner surfaces of the upper plate 31c and the lower plate 31d of the housing 31. The ultraviolet light having the rated wavelength (for example, 254 nm) emitted from the ultraviolet lamp 33 having the above-described configuration is reflected directly or after being reflected and refracted by the reflection plate 35 or the like, and then passes through the opening 31a to the outside. Irradiated.
（紫外線ランプを前後方向に移動可能にする構造）
ランプ保持具３４には、図２（ａ）及び図３（ａ）に示すように、スロット３１ｇを挿通してさらに外側に延びたスライド棒３６が形成されている。これにより、ランプ保持具３４及びこれに保持された紫外線ランプ３３は前後方向に移動可能となる。この移動を安定かつ容易にするために、前後方向に延びかつランプ保持具３４を摺動可能な支持レール３７を上板３１ｃ、下板３１ｄの内壁側に設けてもよい。
(Structure that allows the UV lamp to move in the front-back direction)
As shown in FIGS. 2A and 3A, the lamp holder 34 is formed with a slide bar 36 that extends through the slot 31g and extends further outward. Thereby, the lamp holder 34 and the ultraviolet lamp 33 held by the lamp holder 34 can be moved in the front-back direction. In order to make this movement stable and easy, a support rail 37 extending in the front-rear direction and capable of sliding the lamp holder 34 may be provided on the inner wall side of the upper plate 31c and the lower plate 31d.
これにより、後述するように、長時間使用により紫外線ランプ３３の発光強度の低下が確認された場合又は低下すると予測された場合に、保守員は、スライド棒３６を把持して前方に移動させることで、紫外線ランプ３３が取り付けられたランプ保持具３４を、前方に所望距離だけ移動させることができる。つまり、紫外線ランプ３３の照射位置が相対的に前方へ移動するため、長時間経過して紫外線ランプ３３自体の発光強度が低下した後でも、より高強度の紫外線を熱交換器４の表面４１ａ（図３（ａ）参照）へ照射し続けることが可能となる。 As a result, as described later, when it is confirmed that the emission intensity of the ultraviolet lamp 33 decreases due to long-term use, or when it is predicted that the emission intensity will decrease, the maintenance staff grasps the slide bar 36 and moves it forward. Thus, the lamp holder 34 to which the ultraviolet lamp 33 is attached can be moved forward by a desired distance. That is, since the irradiation position of the ultraviolet lamp 33 moves relatively forward, even after a long time has elapsed and the light emission intensity of the ultraviolet lamp 33 itself has been reduced, the ultraviolet light of higher intensity is irradiated onto the surface 41a of the heat exchanger 4 ( 3A) can be continued.
（本発明の紫外線照射装置を用いた熱交換器の清掃方法）
以上の構成の紫外線照射装置３を用いて熱交換器４（内の冷温水コイル）を清掃する方法を説明する。図４に、本発明の清掃方法の各工程を示したフローチャートを示す。ここで、紫外線照射装置３の実際の使用に先立ち、紫外線ランプ３３の耐久試験を行い、以下の関係式Ｆ１〜Ｆ３の導出を行うことに留意されたい。
(Method of cleaning heat exchanger using ultraviolet irradiation device of the present invention)
A method of cleaning the heat exchanger 4 (the internal cold / hot water coil) using the ultraviolet irradiation device 3 having the above configuration will be described. FIG. 4 is a flowchart showing each step of the cleaning method of the present invention. Here, it should be noted that prior to actual use of the ultraviolet irradiation device 3, a durability test of the ultraviolet lamp 33 is performed, and the following relational expressions F1 to F3 are derived.
先ず、紫外線照射装置３へ設置する紫外線ランプ３３と同型の製品を用いて、紫外線ランプ３３の使用時間ｔ（発光時間）と、熱交換器４の表面４１ａに相当する基準位置での照射強度Ｉとの関係式Ｆ１を導出する（工程Ｓ１）。つまり、紫外線ランプ３３の使用時間ｔに対応した照射強度Ｉの劣化を予測する。 First, using a product of the same type as the ultraviolet lamp 33 installed in the ultraviolet irradiation device 3, the usage time t (emission time) of the ultraviolet lamp 33 and the irradiation intensity I at the reference position corresponding to the surface 41 a of the heat exchanger 4 are determined. Is derived (step S1). That is, the deterioration of the irradiation intensity I corresponding to the usage time t of the ultraviolet lamp 33 is predicted.
また、紫外線照射装置３内の紫外線ランプ３３と、熱交換器４の表面４１ａ（被照射面、被清掃面）との間の距離Ｌと、照射強度Ｉとの関係式Ｆ２を導出する（工程Ｓ２）。 Further, a relational expression F2 between the distance L between the ultraviolet lamp 33 in the ultraviolet irradiation device 3 and the surface 41a (the surface to be irradiated and the surface to be cleaned) of the heat exchanger 4 and the irradiation intensity I is derived (step). S2).
上記２つの関係式Ｆ１，Ｆ２から、熱交換器４の表面４１ａでの紫外線の照射強度Ｉを一定に保つため、使用時間ｔと、紫外線ランプ３３の設置位置Ｘ（若しくは移動距離Ｌ）との関係式Ｆ３を導出する（工程Ｓ３）。 From the above two relational expressions F1 and F2, in order to keep the irradiation intensity I of the ultraviolet light on the surface 41a of the heat exchanger 4 constant, the use time t and the installation position X (or the moving distance L) of the ultraviolet lamp 33 are determined. A relational expression F3 is derived (step S3).
熱交換器４の一次側ＳＤ１又は二次側ＳＤ２或いは両側ＳＤ１，ＳＤ２に紫外線照射装置３を設置し、この際に、紫外線照射装置３内の紫外線ランプ３３を、上記関係式Ｆ３で得られた初期位置Ｘ（ｔ＝０）に固定する（工程Ｓ４）。なお、図３（ａ）に示すように、熱交換器４の表面４１ａから距離Ｌｄだけ離し、かつ、垂直に面するように紫外線照射装置３を設置することが好ましい。 The ultraviolet irradiation device 3 is installed on the primary side SD1 or the secondary side SD2 or both sides SD1 and SD2 of the heat exchanger 4, and at this time, the ultraviolet lamp 33 in the ultraviolet irradiation device 3 is obtained by the above relational expression F3. It is fixed at the initial position X (t = 0) (step S4). In addition, as shown in FIG. 3A, it is preferable that the ultraviolet irradiation device 3 is installed so as to be separated from the surface 41 a of the heat exchanger 4 by a distance Ld and to face vertically.
その後、紫外線照射装置３に電源をつなぎ、紫外線ランプ３３を発光させ、熱交換器４の表面４１ａへ紫外線を照射する（工程Ｓ５）。熱交換器４を含めた空調設備も同時に稼働させる。 Thereafter, the power supply is connected to the ultraviolet irradiation device 3, the ultraviolet lamp 33 emits light, and the surface 41a of the heat exchanger 4 is irradiated with ultraviolet light (step S5). The air conditioning equipment including the heat exchanger 4 is also operated at the same time.
定期的にオペレーターまたは保守員が紫外線照射装置３を監視する等して、次の操作を行う。すなわち、所定時間ｔの経過（使用）に対応した分、紫外線ランプ３３を熱交換器４側に近づくように移動し、上記関係式Ｆ３から得られた紫外線ランプ３３の設置位置Ｘ（ｔ）にて移動・固定する（工程Ｓ６）。なお、上記のように保守員が手動操作で紫外線ランプ３３を移動させることに必ずしも限定されず、紫外線照射装置３に図示しないプログラム及び搬送装置を組み込み、上記移動操作を自動化してもよい。 An operator or a maintenance person periodically monitors the ultraviolet irradiation device 3 and performs the following operation. That is, the ultraviolet lamp 33 is moved closer to the heat exchanger 4 by an amount corresponding to the elapse (use) of the predetermined time t, and is moved to the installation position X (t) of the ultraviolet lamp 33 obtained from the above relational expression F3. To move and fix (step S6). Note that, as described above, the maintenance staff is not necessarily limited to manually moving the ultraviolet lamp 33, and the moving operation may be automated by incorporating a program and a transport device (not shown) into the ultraviolet irradiation device 3.
基本的に、病院等の大型施設内の空調設備は常時稼働しているため、紫外線ランプ３３のフィラメントが切れた場合又はその使用時間ｔが最長許容時間を超えた場合、新品のものと交換する（工程Ｓ７）。 Basically, the air-conditioning equipment in a large facility such as a hospital is always in operation. Therefore, when the filament of the ultraviolet lamp 33 is broken or when the usage time t exceeds the maximum allowable time, the air-conditioning equipment is replaced with a new one. (Step S7).
本方法によれば、紫外線ランプ３３を継続使用して紫外線の発光強度が段階的に低下した（低下が予想された）場合でも、紫外線ランプ３３の設置位置Ｘを熱交換器４に所望の距離だけ接近させることができるため、熱交換器４に受光される紫外線強度を一定に保つことができ、熱交換器４上の雑菌の繁殖を抑制することができるのである。 According to this method, even if the ultraviolet lamp 33 is continuously used and the emission intensity of the ultraviolet light is reduced stepwise (it is expected to decrease), the installation position X of the ultraviolet lamp 33 is set at a desired distance to the heat exchanger 4. As a result, the intensity of the ultraviolet light received by the heat exchanger 4 can be kept constant, and the growth of various bacteria on the heat exchanger 4 can be suppressed.
（紫外線強度の劣化（経時的変化）の検討・予測）
本発明者らは、紫外線照射装置３において、図３（ａ）に示すように、紫外線強度の劣化に応じて、紫外線ランプ３３を、照射方向前方へ（すなわち、熱交換器４の表面４１ａにより近接して）移動可能な構成とした。
(Examination and prediction of deterioration of UV intensity (change over time))
The present inventors, in the ultraviolet irradiation device 3, as shown in FIG. 3A, according to the deterioration of the ultraviolet intensity, the ultraviolet lamp 33 is moved forward in the irradiation direction (that is, by the surface 41a of the heat exchanger 4). It is configured to be movable (close).
しかしながら、紫外線ランプ３３をどの程度の時間だけ使用（点灯）したら、該ランプ３３をどの程度前方に移動したら良いか不明であった。つまり、上述の工程Ｓ１〜Ｓ３の関係式Ｆ１〜Ｆ３を導出する必要があった。そこで、本発明者らは、先ず、紫外線ランプ３３の紫外線強度の経時的変化を実測することにした。この際に、紫外線ランプ３３を複数本利用して繰り返し同様の劣化試験を行った。 However, it has been unclear how long the ultraviolet lamp 33 should be used (lighted) and the lamp 33 should be moved forward. That is, it was necessary to derive the relational expressions F1 to F3 of the above steps S1 to S3. Then, the present inventors first measured the temporal change of the ultraviolet intensity of the ultraviolet lamp 33. At this time, the same deterioration test was repeatedly performed using a plurality of ultraviolet lamps 33.
図５に、紫外線ランプ３３の耐久試験（劣化試験）にて実測された強度データをプロットした後に漸近させた強度劣化曲線を示す。具体的には、点灯時間が１，０００時間になると紫外線強度は約８８％に、３，０００時間になると紫外線強度は約６４％に、５，０００時間になると紫外線強度は約４０％にまで低下することが判った。 FIG. 5 shows an intensity deterioration curve obtained by plotting the intensity data actually measured in the durability test (deterioration test) of the ultraviolet lamp 33 and then asymptotically approaching it. Specifically, when the lighting time is 1,000 hours, the UV intensity is about 88%, when it is 3,000 hours, the UV intensity is about 64%, and when it is 5,000 hours, the UV intensity is about 40%. It was found to decrease.
このように紫外線照射装置３に載置する紫外線ランプ３３と同種のランプを用いて、紫外線強度の劣化曲線（経時的変化、言い換えれば、上記の関係式Ｆ１〜Ｆ３）を事前に把握することが好ましい。この事前に予測された劣化状況に応じた分だけ、筐体３１内の紫外線ランプ３３をより前方に移動させることで、強度は劣化するものの熱交換器４の表面４１ａにはより多くの紫外線を照射することできる。つまり、長時間使用したとしても常に高強度の紫外線ランプ３３を熱交換器４の表面４１ａに照射して塵芥や雑菌の除去を行うことができるようになる。 As described above, it is possible to grasp in advance the deterioration curve (time-dependent change, in other words, the above-mentioned relational expressions F1 to F3) of the ultraviolet intensity using the same kind of lamp as the ultraviolet lamp 33 mounted on the ultraviolet irradiation device 3. preferable. By moving the ultraviolet lamp 33 in the housing 31 forward by an amount corresponding to the deterioration state predicted in advance, more ultraviolet light is applied to the surface 41a of the heat exchanger 4 although the intensity is deteriorated. Irradiation is possible. That is, even if the lamp is used for a long time, the surface 41a of the heat exchanger 4 is always irradiated with the high-intensity ultraviolet lamp 33 to remove dust and germs.
（フェアリング角度の検討）
また、空気調和機１（例えば、病院等で使用されるエアハンドリングユニット）の内部では、その熱交換器４周りの気体の流速は、通常、３〜５ｍ／ｓと極めて大きい。そのため、この熱交換器４の近くに紫外線照射装置３を設置することによって、気体流路における圧力損失が急激に増大してしまう可能性がある。
(Examination of fairing angle)
Further, inside the air conditioner 1 (for example, an air handling unit used in a hospital or the like), the flow velocity of the gas around the heat exchanger 4 is usually as extremely large as 3 to 5 m / s. Therefore, by installing the ultraviolet irradiation device 3 near the heat exchanger 4, there is a possibility that the pressure loss in the gas flow path increases rapidly.
そこで、流体解析により、フェアリングカバー３２の外形（フェアリング角度θｆ）が圧力損失に及ぼす影響を検討した。 Therefore, the influence of the outer shape of the fairing cover 32 (the fairing angle θf) on the pressure loss was examined by fluid analysis.
図３（ａ）に示すように、フェアリングカバー３２の断面は底辺の無い三角形を成すが、底辺に延びる二辺（傾斜板３２ｂ，３２ｃ）と、この二辺が接続する頂点（カバー終端線３２ｄ）と、で形成されるフェアリング角度θｆが鈍角から鋭角になるように変化させてみた。具体的には、θｆを１５０°、１２０°、９０°、４５°に設定した場合の数値解析モデルを構築し、その圧力損失の算出及び流れ場の可視化を行った。加えて、θｆ＝０°、つまり、フェアリングカバー３２を設けない数値解析モデルも構築し、同様の解析を行った。 As shown in FIG. 3A, the cross section of the fairing cover 32 forms a triangle without a base. Two sides (inclined plates 32b and 32c) extending to the base and a vertex (cover end line) connecting the two sides are formed. 32d), the fairing angle θf formed by was changed from an obtuse angle to an acute angle. Specifically, a numerical analysis model in which θf was set to 150 °, 120 °, 90 °, and 45 ° was constructed, and the pressure loss was calculated and the flow field was visualized. In addition, a numerical analysis model was constructed in which θf = 0 °, that is, the fairing cover 32 was not provided, and the same analysis was performed.
風向きとして、気流が最初にフェアリングカバー３２にぶつかる方向（紫外線照射装置３を「一次側」に設置した場合とも呼ぶ。図１や図３（ｃ）の符号ＳＤ１を参照）と、気流が最初に開口部にぶつかる方向（紫外線照射装置３を「二次側」に設置した場合とも呼ぶ。図１や図３（ｃ）の符号ＳＤ２を参照）と、を想定した。なお、流速は１〜５ｍ／ｓまで検討することとした。 As the wind direction, the direction in which the airflow first strikes the fairing cover 32 (also referred to as the case where the ultraviolet irradiation device 3 is installed on the “primary side”; see the symbol SD1 in FIG. 1 and FIG. 1 (also referred to as a case where the ultraviolet irradiation device 3 is installed on the “secondary side”; see the symbol SD2 in FIG. 1 and FIG. 3C). In addition, the flow velocity was determined from 1 to 5 m / s.
（一次側設置の場合の圧力損失）
図６は、一次側設置条件の各モデルでの圧力損失（数値解析結果）を示したグラフである。フェアリング角度θｆが小さくなるにつれて、圧力損失が大幅に抑制されることが判る。具体的には、流速を５ｍ／ｓとし、フェアリングカバー３２の無いθｆ＝０の場合の圧力損失を１（１００％）とすると、θｆ＝１５０°になると圧力損失は約９１％に、θｆ＝１２０°になると圧力損失は約７４％に、θｆ＝９０°になると圧力損失は約４５％に、θｆ＝４５°になると圧力損失は約３３％にまで低下することが判った。
(Pressure loss for primary installation)
FIG. 6 is a graph showing pressure loss (numerical analysis result) in each model of the primary-side installation conditions. It can be seen that as the fairing angle θf decreases, the pressure loss is significantly suppressed. Specifically, assuming that the flow velocity is 5 m / s and the pressure loss when θf = 0 without the fairing cover 32 is 1 (100%), when θf = 150 °, the pressure loss becomes about 91%, and θf = 120 °, the pressure loss is reduced to about 74%, when θf = 90 °, the pressure loss is reduced to about 45%, and when θf = 45 °, the pressure loss is reduced to about 33%.
このことから、θｆ≦１２０°であって、θｆが小さければ小さい程、良いことになるが、θｆが極めて小さくなれば、フェアリングカバー３２の流路方向長さ（ひいては、紫外線照射装置３の全長）が極めて長くなり、空気調和機１内の限られた空間に紫外線照射装置３を設置できなくなる。従って、θｆは、４５°≦θｆ≦１２０°が好ましく、６０°≦θｆ≦９０°がさらに好ましい。 Therefore, a .theta.f ≦ 120 °, the smaller the .theta.f, but a good thing, if .theta.f is extremely small, the flow direction length of the fairing cover 32 (hence, the ultraviolet irradiation device 3 (Overall length) becomes extremely long, and the ultraviolet irradiation device 3 cannot be installed in a limited space in the air conditioner 1. Therefore, θf is preferably 45 ° ≦ θf ≦ 120 °, more preferably 60 ° ≦ θf ≦ 90 °.
（一次側設置の場合の流線）
また、図７（ａ）〜（ｅ）に、異なるフェアリング角度θｆを持つ各モデル（風向き：一次側設置）で導出された流線を示す。フェアリングカバー３２が無い場合やフェアリング角度θｆが鈍角である場合（θｆ＝１５０°，θｆ＝１２０°）は、筐体３１の後流や筐体３１の上板３１ｃ、下板３１ｄの外側に渦流が生じている（図７（ａ）〜（ｃ）参照）。この渦流は圧力損失の増大の一因となり得る。一方、フェアリング角度θｆが鋭角である場合（θｆ＝９０°，θｆ＝４５°）は、上述のような渦流は発生せず、円滑な流れを示した（図７（ｄ）及び（ｅ）参照）。
(Streamlines for primary side installation)
FIGS. 7A to 7E show streamlines derived for each model (wind direction: installed on the primary side) having a different fairing angle θf. When there is no fairing cover 32 or when the fairing angle θf is an obtuse angle (θf = 150 °, θf = 120 °), the wake of the housing 31 or the outside of the upper plate 31c and the lower plate 31d of the housing 31. (See FIGS. 7A to 7C). This vortex can contribute to increased pressure loss. On the other hand, when the fairing angle θf is an acute angle (θf = 90 °, θf = 45 °), the vortex does not occur as described above, and a smooth flow is shown (FIGS. 7D and 7E). reference).
（二次側設置の場合の圧力損失）
図８は、二次側設置条件の各モデルでの圧力損失（数値解析結果）を示したグラフである。この図から、二次側設置の場合、フェアリング角度θｆを変更しても圧力損失の結果に大差が無く、フェアリングカバー３２の追設効果がほとんど得られ無いことが判った。
(Pressure loss for secondary side installation)
FIG. 8 is a graph showing pressure loss (numerical analysis result) in each model of the secondary side installation condition. From this figure, it was found that in the case of the secondary installation, even if the fairing angle θf was changed, there was no significant difference in the result of the pressure loss, and the additional effect of the fairing cover 32 was hardly obtained.
（バッフル板の追加設置）
また、上述のフェアリングカバー３２が取り付けられる筐体３１の端部（つまり、背面板３１ｂ）とは反対の端部（つまり、開口部３１ａ側）に、後述のバッフル板３８を設けてもよい。バッフル板３８は、例えば、図２（ａ）及び図３（ａ）に示すように、筐体３１（開口部３１ａを区画する上板３１ｃ、下板３１ｄ）の先端部分を内側に向くように傾斜させることにより形成される。図３（ｂ）に示す例では、上下のバッフル板３８のそれぞれの傾斜角θｂは４５°であり、上記先端部分で開口部３１ａが若干窄まった構成となっている。
(Addition of baffle plate)
Further, a baffle plate 38 described later may be provided at an end (that is, the opening 31a side) opposite to an end of the housing 31 to which the above-mentioned fairing cover 32 is attached (that is, the back plate 31b). . The baffle plate 38 is, for example, as shown in FIGS. 2 (a) and 3 (a), so that the front end portion of the housing 31 (the upper plate 31c and the lower plate 31d defining the opening 31a) faces inward. It is formed by tilting. In the example shown in FIG. 3B, the inclination angle θb of each of the upper and lower baffle plates 38 is 45 °, and the opening 31a is slightly narrowed at the tip end.
（バッフル板を設けた解析モデル）
バッフル板３８の追設効果を予測するために以下の数値解析を行った。この解析に用いたモデルは、内部空間が閉じた筐体３１（モデル１）、開口部３１ａを有した筐体３１（モデル１−２）、傾斜角θｂ＝４５°に設定したバッフル板３８を設置した筐体３１（モデル１−３、図３（ｂ）も参照）、傾斜角θｂ＝−４５°に設定したバッフル板３８を設置した筐体３１（モデル１−４）である。なお、風向きとして、紫外線照射装置３を一次側ＳＤ１に設置した場合と、二次側ＳＤ２に設置した場合との双方の場合も計算した。なお、流速は１〜５ｍ／ｓまで検討することとした。
(Analysis model with baffle plate)
The following numerical analysis was performed to predict the effect of adding the baffle plate 38. The model used for this analysis includes a housing 31 (model 1) having an internal space closed, a housing 31 (model 1-2) having an opening 31a, and a baffle plate 38 set at an inclination angle θb = 45 °. The housing 31 (Model 1-3, see also FIG. 3 (b)) is installed, and the housing 31 (Model 1-4) is installed with a baffle plate 38 set at an inclination angle θb = −45 °. The wind direction was calculated both when the ultraviolet irradiation device 3 was installed on the primary side SD1 and when it was installed on the secondary side SD2. In addition, the flow velocity was determined from 1 to 5 m / s.
（一次側設置の場合の圧力損失）
図９に、一次側ＳＤ１に上記モデルを設置した場合の圧力損失の結果を示す。この解析結果から、バッフル板３８の付いたモデル１−３及びモデル１−４での圧力損失が、バッフル板無しのモデル１やモデル１−２の場合より、７％程度、抑制されることが予測された。
(Pressure loss for primary installation)
FIG. 9 shows the results of pressure loss when the above model is installed on the primary side SD1. From this analysis result, it can be seen that the pressure loss in the models 1-3 and 1-4 with the baffle plate 38 is suppressed by about 7% compared to the models 1 and 1-2 without the baffle plate. Predicted.
（二次側設置の場合の圧力損失）
図１０（ａ）に、二次側ＳＤ２に上記モデルを設置した場合の圧力損失の結果を示す。この解析結果から、バッフル板を内向きに付けたモデル１−３の圧力損失が、バッフル板無しのモデル１に対して２０％程度、抑制されることが観察された。一方、バッフル板３８を外向きに付けたモデル１−４の圧力損失が、モデル１に対して５０％程度も増大することが観察された。
(Pressure loss for secondary side installation)
FIG. 10A shows the result of pressure loss when the above model is installed on the secondary side SD2. From this analysis result, it was observed that the pressure loss of the model 1-3 with the baffle plate facing inward was suppressed by about 20% compared to the model 1 without the baffle plate. On the other hand, it was observed that the pressure loss of the model 1-4 in which the baffle plate 38 was attached outward was increased by about 50% compared to the model 1.
以上から、一次側ＳＤ１及び二次側ＳＤ２のいずれの側に設置しても流体抵抗の面で優れた形状は、バッフル板３８を内向きに付けたモデル１−３であることが判った。 From the above, it was found that a model 1-3 excellent in terms of fluid resistance in any of the primary side SD1 and the secondary side SD2 is the model 1-3 in which the baffle plate 38 is provided inward.
（バッフル板及びフェアリングカバーの両方が付いたモデルを二次側に設置）
なお、上述のモデル１−３にさらにフェアリングカバー３２を追加したモデルも構築・解析した。図１０（ｂ）は圧力損失の結果を示し、図１１は、各モデルでの流線（５ｍ／ｓの場合）を示す。
(Model with both baffle plate and fairing cover installed on the secondary side)
In addition, the model which added the fairing cover 32 to the above-mentioned model 1-3 was also constructed and analyzed. FIG. 10B shows the result of pressure loss, and FIG. 11 shows streamlines (in the case of 5 m / s) in each model.
図１０（ｂ）により、二次側に設置したモデル１−３にフェアリングカバー３２を追加しても追加しなくても、その圧力損失特性に左程影響を与えないことが判った。また、図１１より、二次側に設置したモデル１−３にフェアリングカバー３２を追加しない条件と追加した条件では、流れ場の挙動は左程変わらないことが判った。一方、バッフル板無しのモデルや外向きバッフル板３８付のモデルでは、筐体３１の上下側に渦流の発生が観察され、これらの渦流が上述の圧力損失の増大に寄与していることと考えられる。 FIG. 10B shows that the pressure loss characteristics of the model 1-3 installed on the secondary side is not affected to the left with or without the addition of the fairing cover 32. Further, from FIG. 11, it was found that the behavior of the flow field did not change as much to the left under the conditions where the fairing cover 32 was not added to the model 1-3 installed on the secondary side and under the conditions where the fairing cover 32 was added. On the other hand, in the model without the baffle plate and the model with the outward baffle plate 38, generation of eddies is observed on the upper and lower sides of the housing 31, and it is considered that these eddies contribute to the above-described increase in pressure loss. Can be
（反射板の形状の検討）
次に、本発明の紫外線照射装置３において、紫外線により効果的な照射を促す反射板３５の形状を検討することにした。
(Examination of the shape of the reflector)
Next, in the ultraviolet irradiation device 3 of the present invention, the shape of the reflection plate 35 that promotes effective irradiation by ultraviolet light was examined.
図１２（ｆ）の凡例に、評価対象とした各反射板３５の断面形状Ａ〜Ｅを示す。具体的には、紫外線ランプ３３の裏側に垂直に立設させたもの（平形状Ａ）、高さ方向中央に向かって該ランプに近づくように曲折したもの（山形状Ｂ）、山形状とは反対に高さ方向中央に向かって該ランプに離れるように曲折したもの（谷形状Ｃ）、上述の山形状と谷形状とを組み合わせたもの（凹凸形状Ｄ）と、この凹凸形状の反射板に加え、紫外線ランプ３３の上下にも反射板を設置したもの（上下屋根付き凹凸形状Ｅ、図３（ａ）に示す反射板３５の形状も参照）を用意した。 The legends in FIG. 12F show the cross-sectional shapes A to E of the reflection plates 35 to be evaluated. Specifically, the ultraviolet lamp 33 is vertically erected on the back side (flat shape A), the ultraviolet lamp 33 is bent toward the center in the height direction (peak shape B), and the mountain shape is On the other hand, a reflector bent toward the center in the height direction so as to move away from the lamp (valley shape C), a combination of the above-mentioned peak shape and valley shape (concavo-convex shape D), and a reflector having this concavo-convex shape In addition, a reflector plate was also provided above and below the ultraviolet lamp 33 (an uneven shape E with upper and lower roofs; see also the shape of the reflector plate 35 shown in FIG. 3A).
図１２（ａ）〜（ｅ）は、夫々、筐体３１内に各形状の反射板３５を設け、かつ、開口部３１ａからスライド棒３６をＬ＝９０ｍｍだけ離して配置された紫外線ランプ３３によって紫外線を照射した場合の照射強度を示す。これらの図を比較すると、凹凸形状Ｄ及び上下屋根付き凹凸形状Ｅを成す反射板３５を用いると、他の形状の場合に比べ、１．０や０．９といった高強度の紫外線が照射面中央の広い範囲に照射されることが観察された。なお、本実施例では紫外線ランプ３３を動かすためのスライド棒３６の移動距離をＬとして表示したが、必ずしも限定されず、紫外線ランプ３３を基点とした移動距離をＬに使用してもよい。 12 (a) to 12 (e) respectively show a case where the reflecting plate 35 of each shape is provided in the housing 31 and the slide lamp 36 is disposed at a distance of L = 90 mm from the opening 31a by an ultraviolet lamp 33. The irradiation intensity when irradiating ultraviolet rays is shown. Comparing these figures, when the reflector 35 having the uneven shape D and the uneven shape E with the upper and lower roofs is used, compared with the case of other shapes, high intensity ultraviolet rays such as 1.0 and 0.9 are applied to the center of the irradiation surface. Was observed to be irradiated over a wide area. In this embodiment, the moving distance of the slide bar 36 for moving the ultraviolet lamp 33 is indicated as L, but the moving distance from the ultraviolet lamp 33 as a base may be used as L.
図１２（ｆ）は、各条件の照射強度の４０％強度のみを抽出し、これを一つのグラフに表示・比較したものである。この図から、上下屋根付き凹凸形状Ｅを成す反射板３５を用いた場合が最も広範囲に照射されることが判った（特に左右方向にてこの傾向が顕著である）。 FIG. 12F shows only 40% of the irradiation intensity of each condition extracted and displayed and compared in one graph. From this figure, it was found that the case where the reflecting plate 35 having the uneven shape E with the upper and lower roofs was used was irradiated in the widest range (this tendency is particularly remarkable in the left-right direction).
次に、上下屋根付き凹凸形状Ｅを成す反射板３５を採用し、かつ、紫外線ランプ３３の照射位置Ｘを徐々に変更した場合の照射強度Ｉの結果を示す。図１３（ａ）は、開口部に最も近い位置（Ｌ＝１０ｍｍ、図３（ａ）に示すＬ’も参照）に置かれた場合であるが、熱交換器表面４１ａに最も近接しているため、照射強度Ｉが最も高くなる。その他の位置（Ｌ＝４０ｍｍ，Ｌ＝９０ｍｍ，Ｌ＝１２０ｍｍ）に置かれた図１３（ｂ）〜（ｄ）のグラフも、このＬ＝１０ｍｍの照射強度と同じ強度コンター（等高線）を使用して表示している。 Next, the results of the irradiation intensity I when the reflecting plate 35 having the uneven shape E with the upper and lower roofs is adopted and the irradiation position X of the ultraviolet lamp 33 is gradually changed are shown. FIG. 13 (a) shows a case where it is placed at a position closest to the opening (L = 10 mm, see also L 'shown in FIG. 3 (a)), but is closest to the heat exchanger surface 41a. Therefore, the irradiation intensity I becomes highest. The graphs of FIGS. 13B to 13D placed at other positions (L = 40 mm, L = 90 mm, L = 120 mm) also use the same intensity contour (contour line) as the irradiation intensity of L = 10 mm. Is displayed.
これら各位置Ｌでの強度コンターの積分値を導出すれば、照射位置Ｘ（移動距離Ｌ）と照射強度Ｉとの関係式Ｆ２を導出することができる。また、図５は、照射時間ｔの経過に対応した照射強度Ｉの劣化を示した結果である。これにより、経過時間ｔと照射強度Ｉとの関係式Ｆ１を得ることができる。 By deriving the integral value of the intensity contour at each of these positions L, the relational expression F2 between the irradiation position X (movement distance L) and the irradiation intensity I can be derived. FIG. 5 is a result showing the deterioration of the irradiation intensity I corresponding to the elapse of the irradiation time t. Thereby, a relational expression F1 between the elapsed time t and the irradiation intensity I can be obtained.
上記２つの関係式Ｆ１，Ｆ２を組み合わせることにより、経過時間（ランプ使用時間）ｔの照射強度Ｉの劣化に対応して前方へ移動すべき紫外線ランプの照射位置Ｘ（ｔ）を得ることができる。なお、以下の表１は、紫外線点灯時間（使用時間）ｔと、照射強度（出力比）Ｉと、ランプ移動距離Ｌと、の関係を示す。 By combining the above two relational expressions F1 and F2, it is possible to obtain the irradiation position X (t) of the ultraviolet lamp to be moved forward in response to the deterioration of the irradiation intensity I during the elapsed time (lamp use time) t. . Table 1 below shows the relationship among the ultraviolet lighting time (use time) t, the irradiation intensity (output ratio) I, and the lamp moving distance L.
本発明の紫外線照射装置は、以上のような構成を有するため、熱交換器へ紫外線照射を施すことにより、院内集団感染の一因ともなる塵埃や雑菌を分解・除去することが可能であり、かつ、熱交換器周りの流路における流体の圧力損失を増加させることなく空気調和機内に組み込み可能である。 Since the ultraviolet irradiation device of the present invention has the above configuration, by applying ultraviolet irradiation to the heat exchanger, it is possible to decompose and remove dust and various bacteria that contribute to in-hospital group infection, Moreover, it can be incorporated in the air conditioner without increasing the pressure loss of the fluid in the flow path around the heat exchanger.
このように、本発明の紫外線照射装置及びこれを用いた熱交換器の清掃方法は、産業上の利用可能性及び利用価値が非常に高い。 As described above, the ultraviolet irradiating apparatus of the present invention and the method for cleaning a heat exchanger using the same have very high industrial applicability and utility value.
１ 空気調和機
２ ファン
３ 紫外線照射装置
４ 熱交換器
５ 居住空間
６，７ 往路ダクト，復路ダクト
１０ 施設内空調システム
３１ 筐体
３１ａ，３１ｂ，３１ｃ，３１ｄ 開口部，背面板，上板，下板
３１ｅ，３１ｆ，３１ｇ 第１側板，第２側板，スロット
３２ フェアリングカバー
３２ａ，３２ｂ，３２ｃ，３２ｄ 縁部，上側傾斜板，下側傾斜板，カバー終端線
３３ 紫外線ランプ
３４ ランプ保持具
３５ 反射板
３６ スライド棒
３７ 支持レール
３８ バッフル板
４１，４１ａ 熱交換器本体，表面
４２ａ，４２ｂ 第１冷媒管，第２冷媒管
４３ 空調熱源機器
４４ 冷温水ポンプ
５１，５２ 居住空間に設置された吹出口，吸込口
Ａ，Ｂ，Ｃ，Ｄ，Ｅ 反射板の断面形状
Ｌ，Ｌ’ 紫外線ランプ（又はこれを動かすスライド棒）の移動距離
Ｌｄ 熱交換器の表面から紫外線照射装置までの距離
Ｉ 紫外線ランプの照射強度
Ｓ１，Ｓ２，Ｓ３，Ｓ４，Ｓ５，Ｓ６，Ｓ７ 本発明の清掃方法を構成する各工程
ＳＤ１，ＳＤ２ 風向き一次側，二次側
ｔ 紫外線ランプの発光時間（使用時間）
Ｘ 紫外線ランプの設置位置
θｂ，θｆ バッフル板の傾斜角、フェアリング角度
DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Fan 3 Ultraviolet irradiation device 4 Heat exchanger 5 Living space 6, 7 Outgoing duct, return duct 10 In-facility air conditioning system 31 Housing 31a, 31b, 31c, 31d Opening, rear plate, upper plate, lower Plates 31e, 31f, 31g First side plate, second side plate, slot 32 Fairing cover 32a, 32b, 32c, 32d Edge, upper inclined plate, lower inclined plate, cover end line 33 Ultraviolet lamp 34 Lamp holder 35 Reflection Plate 36 Slide rod 37 Support rail 38 Baffle plate 41, 41a Heat exchanger main body, Surface 42a, 42b First refrigerant pipe, Second refrigerant pipe 43 Air conditioning and heat source equipment 44 Cold / hot water pump 51, 52 Air outlet installed in living space , Suction ports A, B, C, D, E Cross-sectional shape of reflector L, L 'Moving distance of ultraviolet lamp (or slide bar to move it) irradiation intensity S1 of the distance I UV lamp from the surface of the d heat exchanger to ultraviolet irradiation apparatus, S2, S3, S4, S5 , S6, S7 each step constituting the cleaning process of the present invention SD1, SD2 wind primary, di- Secondary side t UV lamp emission time (use time)
X UV lamp installation position θb, θf Baffle plate inclination angle, fairing angle
Claims (6)
前記紫外線照射装置は前記熱交換器の風向一次側又は風向二次側或いは両側に設置され、
前記紫外線照射装置は、開口部を備えた筐体と、前記筐体内に配置されかつ前記開口部から紫外線を前記熱交換器の前記表面に向けて照射可能な紫外線ランプと、を備え、
前記紫外線ランプは、紫外線照射強度の劣化に応じて、該紫外線ランプと前記熱交換器との距離を縮めるよう移動可能である、
ことを特徴とする紫外線照射装置。 An ultraviolet irradiation device capable of irradiating the surface of the heat exchanger in the air conditioner with ultraviolet light ,
The ultraviolet irradiation device is installed in the wind direction the primary side or wind the secondary side or both sides of the front Stories heat exchanger,
The ultraviolet irradiation device includes a housing having an opening, and an ultraviolet lamp disposed in the housing and capable of irradiating ultraviolet light from the opening toward the surface of the heat exchanger,
The ultraviolet lamp is movable to reduce a distance between the ultraviolet lamp and the heat exchanger in accordance with a deterioration in ultraviolet irradiation intensity.
An ultraviolet irradiation device, characterized in that:
ことを特徴とする請求項１に記載の紫外線照射装置。 A reflection plate is further formed on the back surface, the top surface, or the bottom surface of the ultraviolet lamp,
The ultraviolet irradiation device according to claim 1, wherein:
ことを特徴とする請求項２に記載の紫外線照射装置。 The reflection plate formed on the back surface has an uneven shape with respect to the ultraviolet lamp,
The ultraviolet irradiation device according to claim 2, wherein:
ことを特徴とする請求項１〜３のいずれかに記載の紫外線照射装置。 A baffle plate for reducing fluid resistance is further formed on an end side of the housing that partitions the opening, and the baffle plate is configured such that the baffle plate gradually reduces the opening area of the opening. The shape narrows toward the tip of the
The ultraviolet irradiation device according to any one of claims 1 to 3, wherein:
ことを特徴とする請求項１〜４のいずれかに記載の紫外線照射装置。 In the housing, a fairing cover for reducing fluid resistance is further formed at the other end opposite to the one end where the opening is installed,
The ultraviolet irradiation device according to any one of claims 1 to 4, wherein:
前記紫外線照射装置へ設置する前記紫外線ランプと同型の製品を用いて、前記紫外線ランプの使用時間と、前記熱交換器の表面での照射強度との関係式Ｆ１を導出する工程と、
前記紫外線ランプと前記熱交換器の表面との間の距離と、前記表面での紫外線照射強度との関係式Ｆ２を導出する工程と、
前記関係式Ｆ１，Ｆ２から、前記熱交換器の前記表面での紫外線照射強度を一定に保つため、前記使用時間と、前記紫外線ランプの移動位置との関係式Ｆ３を導出する工程と、
前記熱交換器の一次側又は二次側或いは両側に前記紫外線照射装置を設置し、前記紫外線ランプを、前記関係式Ｆ３で得られた初期位置Ｘ（ｔ＝０）に固定する工程と、
前記紫外線ランプを発光させ、前記熱交換器の前記表面へ紫外線を照射する工程と、
前記紫外線照射装置の前記使用時間が所定時間ｔの経過したときに、この時間ｔに対応した分、前記紫外線ランプを前記熱交換器側に近づくように移動し、前記関係式Ｆ３から得られた前記紫外線ランプの設置位置Ｘ（ｔ）にて移動・固定する工程と、
を含むことを特徴とする清掃方法。 A cleaning method for cleaning the heat exchanger by irradiating the heat exchanger in the air conditioner with ultraviolet rays using the ultraviolet irradiation apparatus according to any one of claims 1 to 5,
Using a product of the same type as the ultraviolet lamp to be installed in the ultraviolet irradiation device, deriving a relational expression F1 between the usage time of the ultraviolet lamp and the irradiation intensity on the surface of the heat exchanger;
Deriving a relational expression F2 between a distance between the ultraviolet lamp and the surface of the heat exchanger and an ultraviolet irradiation intensity on the surface;
Deriving, from the relational expressions F1 and F2, a relational expression F3 between the use time and the movement position of the ultraviolet lamp in order to keep the ultraviolet irradiation intensity on the surface of the heat exchanger constant;
Installing the ultraviolet irradiation device on the primary side or the secondary side or both sides of the heat exchanger, and fixing the ultraviolet lamp at an initial position X (t = 0) obtained by the relational expression F3;
Illuminating the ultraviolet lamp, and irradiating the surface of the heat exchanger with ultraviolet light,
When the use time of the ultraviolet irradiation device has passed a predetermined time t, the ultraviolet lamp was moved closer to the heat exchanger by an amount corresponding to the time t, and the ultraviolet lamp was obtained from the relational expression F3. Moving and fixing at the installation position X (t) of the ultraviolet lamp;
A cleaning method comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019152651A JP6656785B1 (en) | 2019-08-23 | 2019-08-23 | Ultraviolet irradiation apparatus for heat exchanger in air conditioner and cleaning method using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019152651A JP6656785B1 (en) | 2019-08-23 | 2019-08-23 | Ultraviolet irradiation apparatus for heat exchanger in air conditioner and cleaning method using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP6656785B1 true JP6656785B1 (en) | 2020-03-04 |
| JP2021032467A JP2021032467A (en) | 2021-03-01 |
Family
ID=69997941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2019152651A Active JP6656785B1 (en) | 2019-08-23 | 2019-08-23 | Ultraviolet irradiation apparatus for heat exchanger in air conditioner and cleaning method using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6656785B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023112235A1 (en) * | 2021-12-16 | 2023-06-22 | 三菱電機株式会社 | Indoor unit and air conditioner |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0464014U (en) * | 1990-10-15 | 1992-06-01 | ||
| JP4736749B2 (en) * | 2005-11-25 | 2011-07-27 | 株式会社富士通ゼネラル | Ultraviolet irradiation device and air conditioner equipped with the same ultraviolet irradiation device |
| CN103347544B (en) * | 2010-11-18 | 2016-01-13 | Oy霍尔顿集团有限公司 | Air cleaning facility method and system |
| JP2018155466A (en) * | 2017-03-21 | 2018-10-04 | 株式会社トクヤマ | Indoor unit of air conditioner |
-
2019
- 2019-08-23 JP JP2019152651A patent/JP6656785B1/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023112235A1 (en) * | 2021-12-16 | 2023-06-22 | 三菱電機株式会社 | Indoor unit and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2021032467A (en) | 2021-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2818444C (en) | Air purification devices methods and systems | |
| TWI608200B (en) | Air conditioning device and air conditioning system | |
| US9976957B2 (en) | Device for measuring floating micro-organisms and air conditioner including device for measuring floating micro-organisms | |
| JP6656785B1 (en) | Ultraviolet irradiation apparatus for heat exchanger in air conditioner and cleaning method using the same | |
| KR20090044508A (en) | Air conditioner | |
| US6782707B2 (en) | Air conditioner | |
| US20110122603A1 (en) | Integrated laboratory light fixture | |
| JP5967581B2 (en) | Air conditioner | |
| JP5285179B1 (en) | Air conditioner | |
| WO2020170385A1 (en) | Optical space forming device, sterilization device, air conditioning device, refrigerator, water sterilization device, and detection device | |
| KR101405819B1 (en) | Fan coil unit with oval coil | |
| US20220333792A1 (en) | Air conditioner unit having a sterilization light assembly | |
| KR101720299B1 (en) | Air conditioner with ultra violet light emitting diode | |
| CN104075532A (en) | Air-cooled refrigerator | |
| US11692720B2 (en) | Air conditioner unit having a sterilization light assembly | |
| US11585547B2 (en) | Air conditioner unit having a sterilization light assembly | |
| US20220349597A1 (en) | Air conditioner unit having a sterilization light assembly | |
| CN218860596U (en) | Glass coating cooling circulation device | |
| JP2018124001A (en) | Air conditioner | |
| CN220412966U (en) | LED overcurrent type ultraviolet sterilizer | |
| US20220333802A1 (en) | Air conditioner unit having a sterilization light assembly | |
| TW202319074A (en) | Air sterilization device and air conditioning apparatus using same | |
| KR20230071222A (en) | Air conditioner | |
| BE1018113A3 (en) | Air treating device for e.g. building, has cleaning and disinfecting system for cleaning and disinfecting air portion, and additional line serving as spray line for cleaning and disinfecting air portion | |
| KR100709759B1 (en) | Apparatus for supplying air and illuminating |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20190823 |
|
| A871 | Explanation of circumstances concerning accelerated examination |
Free format text: JAPANESE INTERMEDIATE CODE: A871 Effective date: 20190823 |
|
| A975 | Report on accelerated examination |
Free format text: JAPANESE INTERMEDIATE CODE: A971005 Effective date: 20191129 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20191205 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20191213 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20200204 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20200204 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6656785 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |