JP5898568B2 - Radiant air conditioner - Google Patents

Radiant air conditioner Download PDF

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JP5898568B2
JP5898568B2 JP2012117636A JP2012117636A JP5898568B2 JP 5898568 B2 JP5898568 B2 JP 5898568B2 JP 2012117636 A JP2012117636 A JP 2012117636A JP 2012117636 A JP2012117636 A JP 2012117636A JP 5898568 B2 JP5898568 B2 JP 5898568B2
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temperature
heat
heat radiating
air conditioner
radiant
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JP2013245827A (en
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有賀 徹
徹 有賀
竜司 池辺
竜司 池辺
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Sharp Corp
Inaba Denki Sangyo Co Ltd
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Description

本発明は輻射式空気調和機に関する。   The present invention relates to a radiation type air conditioner.

家屋用のヒートポンプ式空気調和機で、室外機と室内機に分かれたいわゆるセパレート型の空気調和機では、室外機に熱交換器とファンが設けられるとともに、室内機にも熱交換器とファンが設けられるのが通常の構造である。これに対し、同じセパレート型の空気調和機であっても、室内機の熱交換器を輻射パネルとして構成し、ファンを用いることなく、熱の輻射により室内の冷房または暖房を行うタイプのものも存在する。その例を特許文献1に見ることができる。   In a so-called separate type air conditioner, which is a heat pump type air conditioner for a house and divided into an outdoor unit and an indoor unit, the outdoor unit is provided with a heat exchanger and a fan, and the indoor unit also has a heat exchanger and a fan. It is a normal structure that is provided. On the other hand, even in the same separate type air conditioner, there is a type in which the indoor unit heat exchanger is configured as a radiant panel and the room is cooled or heated by heat radiation without using a fan. Exists. An example of this can be seen in US Pat.

特許文献1に記載された空気調和機は建屋の天井に配設される輻射パネルを備える。輻射パネルの内部には冷媒配管が蛇行状に配置されている。冷房運転時には輻射パネルで吸熱がなされて輻射式冷房が行われる。暖房運転時には輻射パネルで放熱がなされて輻射式暖房が行われる。輻射式冷暖房は室内ファンによる空気の攪拌や騒音と無縁であり、静粛で快適な冷暖房を行うことができる。   The air conditioner described in Patent Document 1 includes a radiation panel disposed on the ceiling of a building. Inside the radiation panel, refrigerant piping is arranged in a meandering manner. At the time of cooling operation, heat is absorbed by the radiant panel and radiant cooling is performed. During heating operation, heat is radiated from the radiant panel and radiant heating is performed. Radiant air conditioning is free from air agitation and noise from indoor fans, and can perform quiet and comfortable air conditioning.

特開平10−205802号公報Japanese Patent Laid-Open No. 10-205802

輻射式空気調和機の場合、室内には自然に対流が生じ、室内温度が均一化して行く。本発明は、対流を一層促進し、冷暖房効果を向上させることを目的とする。   In the case of a radiant air conditioner, convection occurs naturally in the room, and the room temperature becomes uniform. An object of the present invention is to further promote convection and improve the cooling / heating effect.

本発明に係る輻射式空気調和機は、室内に配置される輻射パネルと、室外側熱交換器と、前記輻射パネル及び前記室外側熱交換器に冷媒配管を通じて冷媒を循環させる圧縮機とを備え、前記輻射パネルは筐体を備え、前記筐体には、前記冷媒が流れる放熱部と、上部と下部に通風口を有する循環ダクトが設けられており、前記放熱部はその少なくとも一部が前記循環ダクトの内部に露出していることを特徴としている。   A radiant air conditioner according to the present invention includes a radiant panel disposed indoors, an outdoor heat exchanger, and a compressor that circulates refrigerant through refrigerant piping through the radiant panel and the outdoor heat exchanger. The radiant panel includes a housing, and the housing is provided with a heat radiating portion through which the refrigerant flows and a circulation duct having ventilation holes at the upper and lower portions, and at least a part of the heat radiating portion is the It is characterized by being exposed inside the circulation duct.

上記構成の輻射式空気調和機において、前記筐体内に複数の前記放熱部が並列に配置されており、前記放熱部同士の間、または前記放熱部と前記筐体の間に生じた隙間を塞ぐ閉塞板が、前記筐体内に前記循環ダクトを区画形成する役割の一端を担うことが好ましい。   In the radiant air conditioner having the above configuration, a plurality of the heat radiating portions are arranged in parallel in the housing, and the gap generated between the heat radiating portions or between the heat radiating portion and the housing is closed. It is preferable that the closing plate plays one end of the role of defining the circulation duct in the casing.

上記構成の輻射式空気調和機において、前記循環ダクトの内部に、前記放熱部からの輻射熱を吸収し、その熱を前記循環ダクト内の空気に再放出する吸熱体が配置されていることが好ましい。   In the radiant air conditioner having the above-described configuration, it is preferable that a heat absorber that absorbs radiant heat from the heat radiating portion and re-releases the heat to the air in the circulation duct is disposed inside the circulation duct. .

上記構成の輻射式空気調和機において、前記筐体の正面には前記放熱部より室内に熱を輻射させるための開口部が設けられ、この開口部にはガード部材が設けられていることが好ましい。   In the radiant air conditioner having the above configuration, an opening for radiating heat from the heat radiating portion to the room is provided on the front surface of the housing, and a guard member is preferably provided in the opening. .

上記構成の輻射式空気調和機において、当該輻射式空気調和機の制御部は、室内温度を検出する温度検出器が、冷房運転時に室内温度が所定温度以下になったことを検出したときと、暖房運転時に室内温度が所定温度以上になったことを検出したときに、前記圧縮機を停止させる制御を行うことが好ましい。   In the radiant air conditioner configured as described above, the controller of the radiant air conditioner detects when the temperature detector that detects the room temperature detects that the room temperature is equal to or lower than a predetermined temperature during cooling operation. It is preferable to perform control to stop the compressor when it is detected that the room temperature has become equal to or higher than a predetermined temperature during the heating operation.

上記構成の輻射式空気調和機において、当該輻射式空気調和機の制御部は、外気温を検出する温度検出器が、冷房運転モード設定時に外気温が所定温度以下になったことを検出したときと、暖房運転モード設定時に外気温が所定温度以上になったことを検出したときは、設定した運転モードでの運転を差し止めることが好ましい。   In the radiant air conditioner having the above configuration, when the temperature detector that detects the outside air temperature detects that the outside air temperature has become equal to or lower than the predetermined temperature when the cooling operation mode is set. When it is detected that the outside air temperature has become equal to or higher than the predetermined temperature when the heating operation mode is set, it is preferable to stop the operation in the set operation mode.

本発明によると、上部と下部に通風口を有する循環ダクトが輻射パネルに設けられ、冷媒が流れる放熱部の少なくとも一部が循環ダクトの内部に露出しているから、冷房運転時には上部通風口から入り下部通風口から出る空気流が循環ダクトに生じ、暖房運転時には下部通風口から入り上部通風口から出る空気流が循環ダクトに生じる。この空気流により室内に空気の循環が発生し、冷暖房効果が向上する。この循環は送風機を駆動して行うものではないので送風機のコストは不要であり、送風機の騒音がなく、電力消費が増大することもない。   According to the present invention, the circulation duct having the ventilation openings at the top and the bottom is provided in the radiation panel, and at least a part of the heat radiating part through which the refrigerant flows is exposed inside the circulation duct. An air flow that exits from the inlet and lower vent is generated in the circulation duct, and an air flow that enters from the lower vent and exits from the upper vent is generated in the circulation duct during heating operation. This air flow causes the circulation of air in the room, improving the cooling / heating effect. Since this circulation is not performed by driving the blower, the cost of the blower is unnecessary, there is no noise of the blower, and power consumption does not increase.

本発明に係る輻射式空気調和機の概略構成図で、冷房運転時の状態を示すものである。It is a schematic block diagram of the radiation type air conditioner which concerns on this invention, and shows the state at the time of air_conditionaing | cooling operation. 本発明に係る輻射式空気調和機の概略構成図で、暖房運転時の状態を示すものである。It is a schematic block diagram of the radiation type air conditioner which concerns on this invention, and shows the state at the time of heating operation. 放熱部の第1の接続構成例を示す説明図である。It is explanatory drawing which shows the 1st connection structural example of a thermal radiation part. 放熱部の第2の接続構成例を示す説明図である。It is explanatory drawing which shows the 2nd connection structural example of a thermal radiation part. 放熱部の第1の断面形状例を示す断面図である。It is sectional drawing which shows the 1st cross-sectional shape example of a thermal radiation part. 放熱部の第2の断面形状例を示す断面図である。It is sectional drawing which shows the 2nd cross-sectional shape example of a thermal radiation part. 放熱部が循環ダクトを区画形成する仕組みを示す第1の説明図である。It is 1st explanatory drawing which shows the mechanism in which a thermal radiation part divides and forms a circulation duct. 放熱部が循環ダクトを区画形成する仕組みを示す第2の説明図である。It is the 2nd explanatory view showing the mechanism in which a heat dissipation part divides and forms a circulation duct. 輻射式空気調和機の制御ブロック図である。It is a control block diagram of a radiation type air conditioner. 輻射パネルの垂直断面図である。It is a vertical sectional view of a radiation panel. 冷房運転時の室内強制循環を示す説明図である。It is explanatory drawing which shows the indoor forced circulation at the time of air_conditionaing | cooling operation. 暖房運転時の室内強制循環を示す説明図である。It is explanatory drawing which shows the indoor forced circulation at the time of heating operation. 循環ダクト内に吸熱体が配置された状態の輻射パネルの垂直断面図である。It is a vertical sectional view of a radiation panel in a state where an endothermic body is disposed in a circulation duct. 吸熱体の正面図である。It is a front view of a heat sink. 正面開口部にガード部材が配置された状態の輻射パネルの正面図である。It is a front view of a radiation panel in the state where a guard member is arranged at a front opening. 正面開口部にガード部材が配置された状態の輻射パネルの垂直断面図である。It is a vertical sectional view of a radiation panel in the state where a guard member is arranged in a front opening.

図1に基づき輻射式空気調和機1の概略構成を説明する。輻射式空気調和機は室外機10と輻射パネル30により構成される。輻射パネル30は室内に配置されるものであり、通常のセパレート型空気調和機の室内機に相当する。   A schematic configuration of the radiant air conditioner 1 will be described with reference to FIG. The radiant air conditioner includes an outdoor unit 10 and a radiant panel 30. The radiation panel 30 is disposed indoors and corresponds to an indoor unit of a normal separate type air conditioner.

室外機10は、板金製部品と合成樹脂製部品により構成される筐体11の内部に、圧縮機12、四方弁13、室外側熱交換器14、膨張弁15、室外側送風機16などを収納している。膨張弁15には開度制御の可能なものが用いられる。   The outdoor unit 10 houses a compressor 12, a four-way valve 13, an outdoor heat exchanger 14, an expansion valve 15, an outdoor blower 16, and the like in a housing 11 composed of sheet metal parts and synthetic resin parts. doing. As the expansion valve 15, a valve whose opening degree can be controlled is used.

室外機10は2本の冷媒配管17、18で輻射パネル30に接続される。冷媒配管17は液体の冷媒を流すことを目的としており、冷媒配管18に比較して細い管が用いられている。そのため冷媒配管17は「液管」「細管」などと称されることがある。冷媒配管18は気体の冷媒を流すことを目的としており、冷媒配管17に比較して太い管が用いられている。そのため冷媒配管18は「ガス管」「太管」などと称されることがある。冷媒には例えばHFC系のR410aやR32等が用いられる。   The outdoor unit 10 is connected to the radiation panel 30 through two refrigerant pipes 17 and 18. The refrigerant pipe 17 is intended to flow a liquid refrigerant, and a pipe that is thinner than the refrigerant pipe 18 is used. Therefore, the refrigerant pipe 17 may be referred to as “liquid pipe”, “narrow pipe”, or the like. The refrigerant pipe 18 is intended to flow a gaseous refrigerant, and is thicker than the refrigerant pipe 17. Therefore, the refrigerant pipe 18 may be referred to as “gas pipe”, “thick pipe”, or the like. For example, HFC R410a or R32 is used as the refrigerant.

室外機10の内部の冷媒配管で、冷媒配管17に接続される冷媒配管には二方弁19が設けられ、冷媒配管18に接続される冷媒配管には三方弁20が設けられる。二方弁19と三方弁20は、室外機10から冷媒配管17、18が取り外されるときに閉じられ、室外機10から外部に冷媒が漏れることを防ぐ。室外機10から、あるいは輻射パネル30を含めた冷凍サイクル全体から、冷媒を放出する必要があるときは、三方弁20を通じて放出が行われる。   In the refrigerant pipe inside the outdoor unit 10, a two-way valve 19 is provided in the refrigerant pipe connected to the refrigerant pipe 17, and a three-way valve 20 is provided in the refrigerant pipe connected to the refrigerant pipe 18. The two-way valve 19 and the three-way valve 20 are closed when the refrigerant pipes 17 and 18 are removed from the outdoor unit 10 to prevent the refrigerant from leaking from the outdoor unit 10 to the outside. When it is necessary to release the refrigerant from the outdoor unit 10 or from the entire refrigeration cycle including the radiation panel 30, the refrigerant is released through the three-way valve 20.

輻射パネル30は室内の壁際に立設されることが多く、板金製部品と合成樹脂製部品により構成される正面形状矩形の筐体31の内部に複数の放熱部32が配置されている。簡潔さを尊び「放熱部」と命名したが、この部品は暖房運転時に周囲の空気に対し放熱を行うだけでなく、冷房運転時に周囲の空気から吸熱を行うものでもある。なお本明細書では吸熱のことを「冷輻射」と称することもある。   The radiation panel 30 is often erected on the wall of the room, and a plurality of heat dissipating portions 32 are disposed inside a front-shaped rectangular casing 31 made up of sheet metal parts and synthetic resin parts. Although it was named “heat radiating part” for simplicity, this part not only radiates heat to the surrounding air during heating operation, but also absorbs heat from the surrounding air during cooling operation. In the present specification, the heat absorption may be referred to as “cold radiation”.

放熱部32は筒状の部品であり、垂直に配置される。図5の第1の断面形状例及び図6の第2の断面形状例に示すように、中心の冷媒管33を放熱フィン34が取り囲む、というのが放熱部32の基本的な構成である。冷媒管33と放熱フィン34は銅やアルミニウムのような熱伝導の良い金属で形成され、互いに密着する。なお、ここで言う「垂直」とは厳密な垂直方向に限られない。多少の傾きを含む垂直方向であってもよい。   The heat radiating part 32 is a cylindrical part and is arranged vertically. As shown in the first cross-sectional shape example of FIG. 5 and the second cross-sectional shape example of FIG. 6, the basic configuration of the heat radiating unit 32 is that the heat radiating fins 34 surround the central refrigerant pipe 33. The refrigerant pipe 33 and the heat radiating fins 34 are formed of a metal having good heat conductivity such as copper or aluminum and are in close contact with each other. The “vertical” referred to here is not limited to a strict vertical direction. The vertical direction including some inclination may be used.

図5の放熱フィン34も図6の放熱フィン34も複数のフィンが放射状に展開する水平断面形状を有している。図5の放熱フィン34は軸線方向に沿って二つ割りにされた部品として形成され、冷媒管33を前後から挟み込んでいる。図6の放熱フィン34は単一の部品であり、中心の、車輪で言えばハブに相当する部分に冷媒管33が挿入されている。言うまでもないが、図5、6に示す放熱部32の構造は単なる例示であり、異なる断面形状の放熱フィン34を用いることもできるし、冷媒管33と放熱フィン34を異なる様式で組み合わせることも可能である。   5 and FIG. 6 have horizontal cross-sectional shapes in which a plurality of fins expand radially. 5 is formed as a part divided into two along the axial direction, and sandwiches the refrigerant pipe 33 from the front and rear. The radiating fin 34 in FIG. 6 is a single component, and a refrigerant pipe 33 is inserted in a central portion corresponding to a wheel in the case of a wheel. Needless to say, the structure of the heat dissipating part 32 shown in FIGS. 5 and 6 is merely an example, and heat dissipating fins 34 having different cross-sectional shapes can be used, or the refrigerant pipe 33 and the heat dissipating fins 34 can be combined in different ways. It is.

筐体31の内部に複数(図においては7本)の放熱部32が互いに並行するように配置される。筐体31の正面には放熱部32より室内に熱を輻射させる(冷房運転時には放熱部32に室内から熱を吸収させる)ための開口部35が設けられている。複数の放熱部32は全て冷媒配管17、18に接続される。図3に示す接続構成例では全ての放熱部32が冷媒配管17、18に並列接続される。図4に示す接続構成例では全ての放熱部32を直列接続したものが冷媒配管17、18に接続されている。   A plurality (seven in the figure) of heat radiating portions 32 are arranged in the housing 31 so as to be parallel to each other. An opening 35 is provided in front of the housing 31 for radiating heat from the heat radiating section 32 into the room (in the cooling operation, the heat radiating section 32 absorbs heat from the room). The plurality of heat radiation portions 32 are all connected to the refrigerant pipes 17 and 18. In the connection configuration example shown in FIG. 3, all the heat radiating portions 32 are connected in parallel to the refrigerant pipes 17 and 18. In the connection configuration example shown in FIG. 4, all the heat radiating sections 32 are connected in series to the refrigerant pipes 17 and 18.

複数の放熱部32を接続するのに、図3、4に示した方式以外の方式を採用することもできる。例えば、複数の放熱部32を所定本数ずつグループ分けし、同一グループに属する放熱部32は互いに並列接続し、グループ同士を直列接続するといった方式も可能である。あるいは、複数の放熱部32を所定本数ずつグループ分けし、同一グループに属する放熱部32は直列接続し、グループ同士を並列接続するといった方式も可能である。   A system other than the system shown in FIGS. 3 and 4 may be employed to connect the plurality of heat radiation units 32. For example, it is possible to group a plurality of heat dissipating units 32 by a predetermined number, connect the heat dissipating units 32 belonging to the same group in parallel, and connect the groups in series. Alternatively, it is also possible to group a plurality of heat dissipating parts 32 by a predetermined number, connect the heat dissipating parts 32 belonging to the same group in series, and connect the groups in parallel.

輻射式空気調和機1の運転制御を行う上で、各所の温度を知ることが不可欠である。この目的のため、室外機10と輻射パネル30に温度検出器が配置される。室外機10においては、室外側熱交換器14に温度検出器21が配置され、圧縮機12の吐出部となる吐出管12aに温度検出器22が配置され、圧縮機12の吸入部となる吸入管12bに温度検出器23が配置され、膨張弁15と二方弁19の間の冷媒配管に温度検出器24が配置され、筐体31の内部の所定箇所に外気温測定用の温度検出器25が配置される。輻射パネル30には放熱部32の温度測定用の温度検出器36と室内温度測定用の温度検出器37が配置される。温度検出器21、22、23、24、25、36、37はいずれもサーミスタにより構成される。   In order to control the operation of the radiant air conditioner 1, it is indispensable to know the temperature of each place. For this purpose, temperature detectors are arranged in the outdoor unit 10 and the radiation panel 30. In the outdoor unit 10, a temperature detector 21 is disposed in the outdoor heat exchanger 14, and a temperature detector 22 is disposed in the discharge pipe 12 a serving as the discharge unit of the compressor 12, and the suction serving as the suction unit of the compressor 12. A temperature detector 23 is disposed in the pipe 12 b, a temperature detector 24 is disposed in the refrigerant pipe between the expansion valve 15 and the two-way valve 19, and a temperature detector for measuring the outside air temperature at a predetermined location inside the housing 31. 25 is arranged. The radiation panel 30 is provided with a temperature detector 36 for measuring the temperature of the heat radiating section 32 and a temperature detector 37 for measuring the room temperature. Each of the temperature detectors 21, 22, 23, 24, 25, 36, and 37 is a thermistor.

温度検出器36は放熱部32の温度測定を目的とするが、放熱部32に直接取り付けられるのでなく、図3に示す通り、液体冷媒用の冷媒配管17に取り付けられる。温度検出器36を冷媒配管17に配置するのは次の理由による。すなわち放熱部32は位置(特に上下の位置)によって温度が異なるため、どの位置に温度検出器36を配置するかを決めるのが難しい。   The temperature detector 36 is intended to measure the temperature of the heat radiating section 32, but is not directly attached to the heat radiating section 32 but is attached to the refrigerant pipe 17 for liquid refrigerant as shown in FIG. The reason for arranging the temperature detector 36 in the refrigerant pipe 17 is as follows. That is, since the temperature of the heat radiating portion 32 varies depending on the position (particularly the upper and lower positions), it is difficult to determine at which position the temperature detector 36 is disposed.

複数の放熱部32を結ぶ冷媒経路がどのように設計されているかによっても放熱部32の表面温度は左右される。冷媒経路が単一経路の場合、圧力損失や冷媒の気液相変化によって温度差が生じやすい。冷媒経路が複数経路の場合、経路によって温度差が生じる可能性がある。また、温度検出器には感温性を良くするために金属で覆われているものがある。放熱部32を構成する金属と温度検出器に使われている金属の種類が異なる場合、それらの接触部において異種金属による電位差が生じ、電蝕を起こす可能性がある。いずれにしても、放熱部32のどの位置に温度検出器36を配置するかを決めるのは容易ではない。   The surface temperature of the heat radiating portion 32 also depends on how the refrigerant path connecting the plurality of heat radiating portions 32 is designed. When the refrigerant path is a single path, a temperature difference is likely to occur due to a pressure loss or a gas-liquid phase change of the refrigerant. When there are a plurality of refrigerant paths, a temperature difference may occur depending on the path. Some temperature detectors are covered with metal to improve temperature sensitivity. When the metal constituting the heat radiating portion 32 and the metal used in the temperature detector are different, a potential difference due to a different metal is generated at the contact portion, and there is a possibility of causing electric corrosion. In any case, it is not easy to determine at which position of the heat radiation part 32 the temperature detector 36 is arranged.

筐体31の内部の冷媒配管17を温度検出器36の取付箇所とすれば、上記の問題は解消される。冷媒配管17は、冷房運転時には膨張弁15で絞られた冷媒が流入する箇所であり、暖房運転時には凝縮した冷媒が放熱部32から流出する箇所である。   If the refrigerant pipe 17 inside the casing 31 is used as the attachment location of the temperature detector 36, the above problem is solved. The refrigerant pipe 17 is a location where the refrigerant throttled by the expansion valve 15 flows in during the cooling operation, and a location where the condensed refrigerant flows out from the heat radiating unit 32 during the heating operation.

冷房運転時には冷媒配管17に気液二相状態の冷媒(ただし、気化があまり進んでいない、液相冷媒が多い状態の冷媒)が流れるので、言い換えれば冷媒の気液相変化が少ないので、冷媒配管17の温度を放熱部32の温度として取り扱うことができる。一方、暖房運転時には冷媒配管17は冷凍サイクルの過冷却部(液相部)となり、液体の冷媒が溜まるため、冷媒配管17の温度を直ちに放熱部32の温度として取り扱うことはできない。しかしながら、適切に温度を補正することにより、暖房運転時においても温度検出器36の測定温度から放熱部32の表面温度を求めることができる。温度補正値は実験を通じて決定する。   Since the refrigerant in the gas-liquid two-phase state (however, the vaporization has not progressed so much and the liquid-phase refrigerant is abundant) flows through the refrigerant pipe 17 during the cooling operation, in other words, since the gas-liquid phase change of the refrigerant is small, the refrigerant The temperature of the pipe 17 can be handled as the temperature of the heat radiation part 32. On the other hand, during the heating operation, the refrigerant pipe 17 becomes a supercooling part (liquid phase part) of the refrigeration cycle, and liquid refrigerant accumulates, so that the temperature of the refrigerant pipe 17 cannot be immediately handled as the temperature of the heat radiating part 32. However, by appropriately correcting the temperature, the surface temperature of the heat dissipating unit 32 can be obtained from the measured temperature of the temperature detector 36 even during the heating operation. The temperature correction value is determined through experiments.

温度検出器36の取付位置は、冷媒配管17の筐体31内部分の中でも比較的上位にある部分とされる。このような場所を温度検出器36の取付位置として選択した理由は後で説明する。   The attachment position of the temperature detector 36 is a relatively higher portion of the refrigerant pipe 17 in the casing 31. The reason why such a place is selected as the mounting position of the temperature detector 36 will be described later.

図10に示す通り、筐体31の内部には放熱部32の背後の位置に循環ダクト50が形成される。循環ダクト50の上部と下部には、それぞれ正面を向いて開口した上部通風口51と下部通風口52が形成されている。上部通風口51と下部通風口52には異物の侵入を防ぐとともに気流の流通方向を規定する通風グリル53、54がはめ込まれている。   As shown in FIG. 10, a circulation duct 50 is formed inside the housing 31 at a position behind the heat radiating portion 32. An upper ventilation port 51 and a lower ventilation port 52 are formed at the upper and lower portions of the circulation duct 50 and open to the front. The upper vent 51 and the lower vent 52 are fitted with vent grills 53 and 54 that prevent foreign substances from entering and regulate the flow direction of the air flow.

全ての放熱部32は、それぞれ背面側の半分が循環ダクト50の内部に露出している。図7に示す通り、放熱部32同士の間には、そこに生じた隙間を塞ぐ閉塞板55が配置されている。最外側の放熱部32と筐体31の間に生じる隙間も閉塞板55で塞がれる。閉塞板55は断熱ボードにより構成される。全ての放熱部32と全ての閉塞板55が一体となり、1個の仕切壁として循環ダクト50の一方の面を構成する。すなわち閉塞板55は筐体31内に循環ダクト50を区画形成する役割の一端を担う。   As for all the thermal radiation parts 32, half of the back side is exposed inside the circulation duct 50, respectively. As shown in FIG. 7, a closing plate 55 is disposed between the heat radiating portions 32 to close the gap generated there. A gap generated between the outermost heat radiation part 32 and the housing 31 is also closed by the closing plate 55. The closing plate 55 is constituted by a heat insulating board. All the heat radiating portions 32 and all the closing plates 55 are integrated to form one surface of the circulation duct 50 as one partition wall. That is, the closing plate 55 plays one end of the role of forming the circulation duct 50 in the housing 31.

図7には放熱部32同士の隙間及び放熱部32と筐体31の隙間を断熱ボード製の閉塞板55で塞ぐ構成を示したが、図8に示すように左右方向に延びる放熱フィン34を延長し、これを閉塞板55とする構成も可能である。図8には複数の放熱部32の放熱フィン34が一体に連続している状況が示されているが、一体化しなくても、隣接する放熱部32の放熱フィン34の端面同士を突き合わせて隙間をなくす構成であってもよい。   FIG. 7 shows a configuration in which the gap between the heat radiating portions 32 and the gap between the heat radiating portion 32 and the housing 31 are closed by a closing plate 55 made of a heat insulating board. However, as shown in FIG. It is also possible to extend and use this as the closing plate 55. FIG. 8 shows a state in which the heat radiating fins 34 of the plurality of heat radiating portions 32 are integrally continuous, but the end surfaces of the heat radiating fins 34 of the adjacent heat radiating portions 32 face each other without being integrated. The structure which eliminates may be sufficient.

冷房運転(除湿運転)時、放熱部32には結露水が発生する。結露水は放熱部32の下に配置された樋状のドレンパン56(図10参照)に受け止められ、図示しない排水経路を介して外部に排出される。   During the cooling operation (dehumidifying operation), condensed water is generated in the heat radiating unit 32. The condensed water is received by a bowl-shaped drain pan 56 (see FIG. 10) disposed under the heat radiating section 32, and is discharged to the outside through a drainage path (not shown).

輻射式空気調和機1の全体制御を司るのは図9に示す制御部40である。制御部40は
室内温度が使用者によって設定された目標値に達するように制御を行う。
The control unit 40 shown in FIG. 9 controls the overall control of the radiant air conditioner 1. The control unit 40 performs control so that the room temperature reaches a target value set by the user.

制御部40は圧縮機12、四方弁13、膨張弁15、及び室外側送風機16に対し動作指令を発する。また制御部40は温度検出器21〜25、及び温度検出器36、37からそれぞれの検出温度の出力信号を受け取る。制御部40は温度検出器21〜25及び温度検出器36、37からの出力信号を参照しつつ、圧縮機12と室外側送風機16に対し運転指令を発し、四方弁13と膨張弁15に対しては状態切り替えの指令を発する。   The control unit 40 issues operation commands to the compressor 12, the four-way valve 13, the expansion valve 15, and the outdoor blower 16. The control unit 40 receives output signals of the detected temperatures from the temperature detectors 21 to 25 and the temperature detectors 36 and 37. While referring to the output signals from the temperature detectors 21 to 25 and the temperature detectors 36 and 37, the control unit 40 issues an operation command to the compressor 12 and the outdoor fan 16, and to the four-way valve 13 and the expansion valve 15. Issue a state change command.

制御部40の設定が「自動運転」になっていると、気温が高いとき、例えば室内温度が30℃で外気温が35℃などといった状況のときは、図示しない運転スイッチをONにすると、輻射式空気調和機1は冷房モードで運転される。気温が低いとき、例えば室内温度が10℃で外気温が2℃などといった状況のときは、図示しない運転スイッチをONにすると、輻射式空気調和機1は暖房モードで運転される。   When the control unit 40 is set to “automatic operation”, when the air temperature is high, for example, when the room temperature is 30 ° C. and the outside air temperature is 35 ° C., for example, turning on an operation switch (not shown) The air conditioner 1 is operated in a cooling mode. When the air temperature is low, for example, when the room temperature is 10 ° C. and the outside air temperature is 2 ° C., for example, when the operation switch (not shown) is turned on, the radiant air conditioner 1 is operated in the heating mode.

図1は輻射式空気調和機1が冷房運転(除湿運転)あるいは除霜運転を行っている状態を示す。圧縮機12から吐出された高温高圧の冷媒は室外側熱交換器14に入り、そこで室外空気との熱交換が行われる。すなわち冷媒は室外空気に対し放熱を行う。放熱し、凝縮して液状となった冷媒は室外側熱交換器14から膨張弁15を通じて輻射パネル30の放熱部32に送られ、減圧し膨張して低温低圧となり、放熱部32の表面温度を下げる。表面温度の下がった放熱部32は室内空気から吸熱、言い方を変えると室内空気に対し冷輻射を行い、これにより室内空気は冷やされる。吸熱後、低温の気体状の冷媒は圧縮機12に戻る。室外側送風機16によって生成された気流が室外側熱交換器14からの放熱を促進する。   FIG. 1 shows a state in which the radiant air conditioner 1 is performing a cooling operation (dehumidifying operation) or a defrosting operation. The high-temperature and high-pressure refrigerant discharged from the compressor 12 enters the outdoor heat exchanger 14 where heat exchange with outdoor air is performed. That is, the refrigerant dissipates heat to the outdoor air. The refrigerant that has dissipated heat and is condensed to become liquid is sent from the outdoor heat exchanger 14 to the heat dissipating part 32 of the radiation panel 30 through the expansion valve 15, and is decompressed and expanded to a low temperature and low pressure. Lower. The heat radiating part 32 whose surface temperature has been lowered absorbs heat from the room air, and in other words, radiates cold air to the room air, thereby cooling the room air. After the heat absorption, the low-temperature gaseous refrigerant returns to the compressor 12. The airflow generated by the outdoor fan 16 promotes heat dissipation from the outdoor heat exchanger 14.

温度検出器37は室内温度を測定し、測定結果を制御部40に出力する。制御部40は、設定レベルにまで室内温度が下がったところで圧縮機12の周波数を低下させ、安定させて、一定の能力を維持する。   The temperature detector 37 measures the room temperature and outputs the measurement result to the control unit 40. The control unit 40 reduces the frequency of the compressor 12 when the room temperature is lowered to the set level, stabilizes the frequency, and maintains a certain capacity.

図2は輻射式空気調和機1が暖房運転を行っている状態を示す。この時は四方弁13が切り替えられて冷房運転時と冷媒の流れが逆になる。すなわち圧縮機12から吐出された高温高圧の冷媒は放熱部32に入り、室内空気に対し放熱を行う。放熱部32の熱交換温度を50℃まで上げるように設定されていれば、放熱部32の表面温度が約50℃になり、輻射熱により周囲の空気が暖められる。   FIG. 2 shows a state where the radiant air conditioner 1 is performing a heating operation. At this time, the four-way valve 13 is switched, and the refrigerant flow is reversed from that during the cooling operation. That is, the high-temperature and high-pressure refrigerant discharged from the compressor 12 enters the heat radiating section 32 and radiates heat to the room air. If the heat exchange temperature of the heat radiating part 32 is set to be raised to 50 ° C., the surface temperature of the heat radiating part 32 becomes about 50 ° C., and the surrounding air is warmed by the radiant heat.

室内空気に対し放熱を行い、凝縮して液状となった冷媒は放熱部32から膨張弁15を通じて室外側熱交換器14に送られ、減圧し膨張して室外側熱交換器14の表面温度を下げる。表面温度の下がった室外側熱交換器14は室外空気から吸熱、言い方を変えると室内空気に対し冷輻射を行い、これにより室外空気は冷やされる。吸熱後、低温の気体状の冷媒は圧縮機12に戻る。室外側送風機16によって生成された気流が室外側熱交換器14による吸熱を促進する。   The refrigerant that radiates heat to the indoor air and condenses into a liquid state is sent from the heat radiating section 32 to the outdoor heat exchanger 14 through the expansion valve 15, decompressed and expanded, and the surface temperature of the outdoor heat exchanger 14 is increased. Lower. The outdoor heat exchanger 14 whose surface temperature has been lowered absorbs heat from the outdoor air, and in other words, cools and radiates the indoor air, thereby cooling the outdoor air. After the heat absorption, the low-temperature gaseous refrigerant returns to the compressor 12. The airflow generated by the outdoor fan 16 promotes heat absorption by the outdoor heat exchanger 14.

温度検出器37は室内温度を測定し、測定結果を制御部40に出力する。制御部40は、設定レベルにまで室内温度が上昇したところで圧縮機12の周波数を低下させ、安定させて、一定の能力を維持する。   The temperature detector 37 measures the room temperature and outputs the measurement result to the control unit 40. The control unit 40 reduces the frequency of the compressor 12 when the room temperature rises to the set level, stabilizes it, and maintains a certain capacity.

暖房運転時に室外側熱交換器14の表面温度が氷点下になり、外気中の水分が付着し、凍結して霜がつくことがある。制御部40は室外側熱交換器14の温度と外気温を比較して霜がついたかどうかを判断し、霜がついたと判断した場合にはリバース除霜を行う。すなわち運転モードを冷房モードに変更して室外側熱交換器14を暖め、霜をとる。   During the heating operation, the surface temperature of the outdoor heat exchanger 14 may become below freezing, moisture in the outside air may adhere, freeze, and form frost. The control unit 40 compares the temperature of the outdoor heat exchanger 14 with the outside air temperature to determine whether frost has been formed. When it is determined that frost has been formed, the controller 40 performs reverse defrosting. That is, the operation mode is changed to the cooling mode, the outdoor heat exchanger 14 is warmed, and frost is removed.

冷房運転時に放熱器32の表面温度が氷点下になり、室内空気中の水分が付着し、凍結して霜がつくことがある。制御部40は放熱部32の温度と室内温度を比較して霜がついたかどうかを判断し、霜がついたと判断した場合には除霜を行う。すなわち運転モードを暖房モードに変更して放熱器32を暖め、霜をとる。放熱部32は、それ自体の熱容量はあまりないのですぐに暖めることができ、室温が上昇する前に除霜を済ませることができる。   During the cooling operation, the surface temperature of the radiator 32 may become below freezing point, moisture in the indoor air may adhere, freeze, and frost may form. The control unit 40 compares the temperature of the heat radiating unit 32 with the room temperature to determine whether or not frost has been formed, and performs defrosting if it is determined that frost has been formed. That is, the operation mode is changed to the heating mode to warm the radiator 32 and remove frost. Since the heat radiating part 32 does not have much heat capacity itself, it can be warmed up quickly and defrosted before the room temperature rises.

暖房運転中、温度検出器36により温度検出が行われる。前述の通り温度検出器36は冷媒配管17に配置されており、輻射パネル30の表面温度(より正確に言うならば放熱部32の表面温度)を直接検出するものではない。また、過冷却度がどのような値になるかによっても冷媒配管17の温度と輻射パネル30の表面温度の差が変化する。そこで暖房運転時には、冷媒配管17の温度から放熱部32の過冷却度を予測して温度を補正することにより、輻射パネル30の表面温度を予測する。補正温度は前述の通り実験を通じて求めておく。   Temperature detection is performed by the temperature detector 36 during the heating operation. As described above, the temperature detector 36 is disposed in the refrigerant pipe 17 and does not directly detect the surface temperature of the radiation panel 30 (more precisely, the surface temperature of the heat radiating unit 32). Further, the difference between the temperature of the refrigerant pipe 17 and the surface temperature of the radiation panel 30 varies depending on what value the degree of supercooling is. Therefore, during the heating operation, the surface temperature of the radiation panel 30 is predicted by correcting the temperature by predicting the degree of supercooling of the heat radiating unit 32 from the temperature of the refrigerant pipe 17. The corrected temperature is obtained through experiments as described above.

上記のように、温度検出器36が検出した温度を補正して求めた輻射パネル30の表面温度を参照しつつ、制御部40は輻射式空気調和機1の暖房運転の制御を行う。   As described above, the control unit 40 controls the heating operation of the radiant air conditioner 1 while referring to the surface temperature of the radiant panel 30 obtained by correcting the temperature detected by the temperature detector 36.

暖房運転中、制御部40は輻射パネル30が設定温度以上の高温になったか、どうかを調べる。この場合の温度検出にも温度検出器36を利用することができる。このように、輻射パネル30が設定温度以上の温度になったかどうかを調べるのに温度検出器36を利用することにより、つまり空調制御用の温度検出器36を保護用の温度検出器に兼用することにより、輻射式空気調和機1の制御システムを簡素化することができる。   During the heating operation, the control unit 40 checks whether or not the radiation panel 30 has become a high temperature equal to or higher than the set temperature. The temperature detector 36 can also be used for temperature detection in this case. Thus, by using the temperature detector 36 to check whether or not the radiation panel 30 has reached a temperature equal to or higher than the set temperature, that is, the temperature detector 36 for air conditioning control is also used as a protective temperature detector. Thereby, the control system of the radiation type air conditioner 1 can be simplified.

冷房運転(除湿運転)あるいは除霜運転の場合には、温度検出器36が検出した温度を放熱部32の表面温度として取り扱うことができる。このため、暖房運転の場合のような温度補正は必要ない。   In the case of cooling operation (dehumidifying operation) or defrosting operation, the temperature detected by the temperature detector 36 can be handled as the surface temperature of the heat radiating unit 32. For this reason, temperature correction as in the case of heating operation is not necessary.

前述の通り、温度検出器36は冷媒配管17の筐体31内部分に取り付けられているので、輻射パネル30の冷媒経路が冷房運転時の冷媒経路であるか暖房運転時の冷媒経路であるかに関係なく、同じ位置で輻射パネル30の表面温度を検出できる。このため、冷房運転時と暖房運転時とで制御の仕様を変える必要がない。   As described above, since the temperature detector 36 is attached to the inside of the casing 31 of the refrigerant pipe 17, whether the refrigerant path of the radiation panel 30 is the refrigerant path during the cooling operation or the refrigerant path during the heating operation. Regardless of, the surface temperature of the radiation panel 30 can be detected at the same position. For this reason, it is not necessary to change the control specifications between the cooling operation and the heating operation.

前述の通り、冷房運転(除湿運転)時、放熱部32には結露水が発生する。温度検出器36は筐体31内の冷媒配管17の中でも比較的上位の部分に取り付けられているので、放熱部32の結露水がドレンパン56の中にドレン水として溜まったとしても、ドレン水に接触せずにいられる。このため、温度検出器36の検出温度に誤りが生じたり、温度検出器36が故障したりすることを懸念せずに済む。放熱部32ほどではないにせよ、冷媒配管17にも結露水が生じるが、その結露水による影響を小さくする上でも、冷媒配管17の上位部分に温度検出器36を配置することは有意義である。   As described above, condensed water is generated in the heat radiating unit 32 during the cooling operation (dehumidifying operation). Since the temperature detector 36 is attached to a relatively upper portion of the refrigerant pipe 17 in the housing 31, even if the condensed water of the heat radiating unit 32 is accumulated as drain water in the drain pan 56, You can stay out of touch. For this reason, there is no need to worry that an error occurs in the temperature detected by the temperature detector 36 or that the temperature detector 36 fails. Although not as much as the heat radiating section 32, condensed water is also generated in the refrigerant pipe 17. However, in order to reduce the influence of the condensed water, it is meaningful to arrange the temperature detector 36 in the upper part of the refrigerant pipe 17. .

図4のように複数の放熱部32を直列接続した場合においても、温度検出部36は冷媒配管17の上位部分に配置する。要は、結露水の発生しにくい箇所に温度検出器36を配置する、というのが守るべき事柄である。   Even in the case where a plurality of heat radiation parts 32 are connected in series as shown in FIG. 4, the temperature detection part 36 is arranged in the upper part of the refrigerant pipe 17. In short, the fact that the temperature detector 36 is arranged at a place where the condensed water hardly occurs is a matter to be protected.

放熱部32は、開口部35を通じて室内空気に直接熱を輻射したり、室内空気から吸熱したりするだけでなく、循環ダクト50の内部の空気に対しても熱を輻射したり、そこから吸熱したりする。これにより、冷房運転時には循環ダクト50の内部の空気は冷却され、暖房運転時には循環ダクト50の内部の空気は加熱される。   The heat radiating section 32 not only radiates heat directly to the room air through the opening 35 or absorbs heat from the room air, but also radiates heat to the air inside the circulation duct 50 or absorbs heat therefrom. To do. Thereby, the air inside the circulation duct 50 is cooled during the cooling operation, and the air inside the circulation duct 50 is heated during the heating operation.

循環ダクト50の内部の空気が冷却され、温度が低下すると、冷えた空気は重いので下降し、図11に示す通り下部通風口52から吹き出す。それと交替に、部屋の上部の空気が上部通風口51から循環ダクト50に引き込まれる。すなわち冷房運転時には上部通風口51から入り下部通風口52から出る空気流が循環ダクト50に生じ、この空気流により室内に自然対流による空気の循環が発生し、室内の上下温度差が小さくなりやすくすることができる。循環が発生するので室温の下がり方も速い。これにより冷房効果が向上する。   When the air inside the circulation duct 50 is cooled and the temperature is lowered, the cooled air is heavy and falls, and blows out from the lower vent 52 as shown in FIG. Instead, the air in the upper part of the room is drawn into the circulation duct 50 from the upper vent 51. That is, during the cooling operation, an air flow that enters from the upper ventilation port 51 and exits from the lower ventilation port 52 is generated in the circulation duct 50. This air flow causes the circulation of air by natural convection in the room, and the difference in the vertical temperature inside the room tends to be small. can do. Because circulation occurs, the temperature can be lowered quickly. This improves the cooling effect.

循環ダクト50の内部の空気が加熱され、温度が上昇すると、暖まった空気は軽いので煙突効果で上昇し、図12に示す通り上部通風口51から吹き出す。それと交替に、部屋の下部の空気が下部通風口52から循環ダクト50に引き込まれる。すなわち暖房運転時には下部通風口52から入り上部通風口51から出る空気流が循環ダクト50に生じ、この空気流により室内に自然対流による空気の循環が発生し、室内の上下温度差が小さくなりやすくすることができる。循環が発生するので室温の上がり方も速い。これにより暖房効果が向上する。   When the air inside the circulation duct 50 is heated and the temperature rises, the warm air is light and thus rises due to the chimney effect, and blows out from the upper vent 51 as shown in FIG. Instead, the air in the lower part of the room is drawn into the circulation duct 50 from the lower vent 52. That is, during the heating operation, an air flow that enters from the lower vent 52 and exits from the upper vent 51 is generated in the circulation duct 50. This air flow causes air circulation by natural convection in the room, and the vertical temperature difference in the room tends to be small. can do. Since circulation occurs, the temperature rises quickly. This improves the heating effect.

循環ダクト50の内部には、図13及び図14に示す吸熱体57を配置することができる。吸熱体57は循環ダクト50の内部に大きく広がる板状の部材であって、図13に示す厚みと、図14に示す幅及び高さを有し、循環ダクト50の内壁面との間に隙間が生じるように固定されている。吸熱体57の面積は、放熱部32からできるだけ広範囲に輻射を受けられるように、広いのがよい。ただし、吸熱体57の前後の空気が断絶してしまうと循環ダクト50の煙突効果が低下するので、そのようなことにならないように設置するのが望ましい。吸熱体57の水平断面積(厚み×幅)は、循環ダクト50の空気流通部の断面積を狭めないように、できるだけ小さい方が良い。   Inside the circulation duct 50, the heat absorption body 57 shown in FIG.13 and FIG.14 can be arrange | positioned. The heat absorber 57 is a plate-like member that extends widely inside the circulation duct 50, has a thickness shown in FIG. 13, a width and a height shown in FIG. 14, and a gap between the inner wall surface of the circulation duct 50. It is fixed to occur. The area of the heat absorber 57 should be wide so that the heat radiating portion 32 can receive radiation from the heat radiating section 32 as much as possible. However, if the air before and after the heat absorber 57 is cut off, the chimney effect of the circulation duct 50 is reduced. The horizontal cross-sectional area (thickness × width) of the heat absorber 57 is preferably as small as possible so as not to reduce the cross-sectional area of the air circulation portion of the circulation duct 50.

吸熱体57は放熱部32からの輻射熱(冷熱または温熱)を吸収する。そのため、冷暖房開始から吸熱体57が輻射熱を十分吸収するまで(再放出できるくらいまで)は、循環ダクト50内では自然対流が起こりにくい。その後、吸熱体57が輻射熱を十分吸収した後は、その熱を、自身の大面積の表面より循環ダクト50内の空気に再放出する。これにより、放熱部32の背面部分が循環ダクト50内に露出しているだけの場合に比べ、放熱を行う部分の空気との接触面積が増えるため、循環ダクト50内の空気を一層効率良く冷却または加熱することができる。   The heat absorber 57 absorbs radiant heat (cold heat or warm heat) from the heat radiating section 32. Therefore, natural convection hardly occurs in the circulation duct 50 from the start of cooling and heating until the heat absorber 57 sufficiently absorbs radiant heat (to the extent that it can be re-released). Thereafter, after the heat absorber 57 sufficiently absorbs the radiant heat, the heat is re-released to the air in the circulation duct 50 from the surface of its large area. Thereby, since the contact area with the air of the part which performs heat dissipation increases compared with the case where the back surface part of the thermal radiation part 32 is only exposed in the circulation duct 50, the air in the circulation duct 50 is cooled more efficiently. Or it can be heated.

吸熱体57は、1枚の金属板であってもよく、複数の金属板を互いの間に隙間を置いて配置してものであってもよい。金属板を耐熱性のある厚紙や耐熱性のある合成樹脂板で置き換えることもできるが、放熱部32に向き合っていない背面側にまで熱を伝えることを考えると、金属を選択するのがよい。輻射熱を良く吸収するように、吸熱体57の表面色は暗色としておくのがよい。   The heat absorber 57 may be a single metal plate or a plurality of metal plates arranged with a gap between each other. Although it is possible to replace the metal plate with a heat-resistant cardboard or a heat-resistant synthetic resin plate, it is better to select a metal in consideration of transferring heat to the back side not facing the heat radiating portion 32. The surface color of the heat absorber 57 should be dark so as to absorb radiant heat well.

放熱部32は冷房運転時には低温になり、暖房運転時には高温になるので、人体、ペット、物などが接触することは極力避けたい。そこで、図15、16に示すように、人体、ペット、物などが放熱部32に接触するのを防止するためのガード部材38を開口部35に設けることができる。ガード部材38は、金属片や合成樹脂片を格子状に組み合わせたもの、金属や合成樹脂のメッシュ材、合成繊維のネット、不織布などにより構成することができる。図13の輻射パネル30にガード部材38を設けてもよい。   The heat dissipating part 32 becomes low temperature during cooling operation and becomes high temperature during heating operation, so it is desirable to avoid contact with human bodies, pets, objects and the like as much as possible. Therefore, as shown in FIGS. 15 and 16, a guard member 38 for preventing a human body, a pet, an object, etc. from coming into contact with the heat radiating portion 32 can be provided in the opening 35. The guard member 38 can be composed of a combination of metal pieces or synthetic resin pieces in a lattice shape, a metal or synthetic resin mesh material, a synthetic fiber net, a nonwoven fabric, or the like. You may provide the guard member 38 in the radiation panel 30 of FIG.

制御部40に次のような制御を行わせることも可能である。それは、室内温度を検出する温度検出器37が、冷房運転時に室内温度が第1の所定温度以下(例えば25℃以下)になったことを検出したときと、暖房運転時に室内温度が第2の所定温度以上(例えば30℃以上)になったことを検出したときに、制御部40に圧縮機12を停止させる、というものである。このようにすることにより、冷房の必要性が薄らいだ後も冷房運転を続けたり、暖房の必要性が薄らいだ後も暖房運転を続けたりすることによる無駄なエネルギーの消費を防ぐことができる。輻射式空気調和機1の寿命も長くなる。   It is also possible to cause the control unit 40 to perform the following control. That is, when the temperature detector 37 that detects the room temperature detects that the room temperature is equal to or lower than a first predetermined temperature (for example, 25 ° C. or lower) during the cooling operation, and the room temperature is equal to the second temperature during the heating operation. When it is detected that the temperature is higher than a predetermined temperature (for example, 30 ° C. or higher), the control unit 40 stops the compressor 12. By doing so, it is possible to prevent wasteful energy consumption due to continuing the cooling operation even after the necessity for cooling is reduced, or continuing the heating operation after the necessity for heating is reduced. The life of the radiant air conditioner 1 is also increased.

制御部40は、冷房運転時に一旦所定温度以下になった室内温度が再び所定温度まで上昇したり、暖房運転時に一旦所定温度以上になった室内温度が再び所定温度まで下降したりしたときは、圧縮機12の運転を再開する。   When the room temperature once lower than the predetermined temperature during the cooling operation rises again to the predetermined temperature, or when the room temperature once higher than the predetermined temperature during the heating operation decreases again to the predetermined temperature, The operation of the compressor 12 is resumed.

制御部40に次のような制御を行わせることも可能である。それは、外気温を検出する温度検出器25が、冷房運転モード設定時に外気温が第1の所定温度以下(例えば10℃以下)になったことを検出したときと、暖房運転モード設定時に外気温が第2の所定温度以上(例えば25℃以上)になったことを検出したときは、制御部40は設定した運転モードでのサイクル運転を差し止める、言い換えれば、圧縮機12を駆動せず、停止状態を維持する、というものである。   It is also possible to cause the control unit 40 to perform the following control. That is, when the temperature detector 25 that detects the outside air temperature detects that the outside air temperature is equal to or lower than a first predetermined temperature (for example, 10 ° C. or less) when the cooling operation mode is set, and when the outside air temperature is set when the heating operation mode is set. Is detected to be equal to or higher than a second predetermined temperature (for example, 25 ° C. or higher), the control unit 40 stops the cycle operation in the set operation mode, in other words, does not drive the compressor 12, It is to maintain the stop state.

例えば、外気温が35℃のときに使用者が誤って暖房モードで輻射式空気調和機1を運転しようとしても、圧縮機12は稼働を差し止められる。すなわち圧縮機12は駆動されず、停止状態を維持する。このようにすることにより、無理なサイクル運転を避け、輻射式空気調和機1を保護することができる。   For example, if the user mistakenly tries to operate the radiant air conditioner 1 in the heating mode when the outside air temperature is 35 ° C., the operation of the compressor 12 is suspended. That is, the compressor 12 is not driven and maintains a stopped state. By doing in this way, an unreasonable cycle driving can be avoided and the radiation type air conditioner 1 can be protected.

使用者が輻射式空気調和機1を、外気温が第1の所定温度以下のときに誤って冷房モードで運転しようとしたり、外気温が第2の所定温度以上のときに誤って暖房モードで運転しようとしたりしたとき、図示しない表示部にエラー表示を出してもよいが、エラー表示を出さなくても問題はない。というのは、冷房モードであるのに室内温度は下がらず、暖房モードであるのに室内温度は上昇しないので、やがて使用者が間違いに気づくからである。   The user erroneously tries to operate the radiant air conditioner 1 in the cooling mode when the outside air temperature is equal to or lower than the first predetermined temperature, or mistakenly operates in the heating mode when the outside air temperature is equal to or higher than the second predetermined temperature. When trying to drive, an error display may be displayed on a display unit (not shown), but there is no problem if no error display is displayed. This is because the room temperature does not decrease in the cooling mode, and the room temperature does not increase in the heating mode, so that the user will eventually notice a mistake.

制御部40は、使用者が冷房運転モードを設定したときに外気温が第1の所定温度以下に下がったことで冷房運転モードでのサイクル運転を差し止めた場合、外気温が第1の所定温度まで上昇すれば冷房運転モードでのサイクル運転をスタートさせる。また制御部40は、使用者が暖房運転モードを設定したときに外気温が第2の所定温度以上に上がったことで暖房運転モードでのサイクル運転を差し止めた場合、外気温が第2の所定温度まで下降すれば暖房運転モードでのサイクル運転をスタートさせる。   When the user sets the cooling operation mode, the control unit 40 stops the cycle operation in the cooling operation mode because the outside air temperature has dropped below the first predetermined temperature, so that the outside air temperature is the first predetermined temperature. If it rises to, cycle operation in the cooling operation mode is started. In addition, when the control unit 40 stops the cycle operation in the heating operation mode because the outside air temperature has risen to the second predetermined temperature or more when the user sets the heating operation mode, the outside air temperature is set to the second predetermined temperature. If the temperature falls to the temperature, the cycle operation in the heating operation mode is started.

これまで、放熱部32は一部が開口部35から室内空間に露出し、他の一部は循環ダクト50の内部に露出するものとしてきたが、放熱部32の全てを循環ダクト50の中に取り込み、外部には放熱部32を露出させない、という構成も可能である。   Up to now, a part of the heat radiating part 32 is exposed to the indoor space from the opening 35 and the other part is exposed to the inside of the circulation duct 50. It is also possible to adopt a configuration in which the heat radiation unit 32 is not exposed to the outside.

また、放熱部32は垂直に配置するものとして話を進めてきたが、放熱部32を水平に配置する構成も可能である。その場合の放熱フィン34は、冷媒管33の軸線に直交する薄板を、互いの間に間隔を置いて多数配置する構成とするのがよい。   Further, the discussion has been made assuming that the heat dissipating unit 32 is arranged vertically, but a configuration in which the heat dissipating unit 32 is arranged horizontally is also possible. In this case, the heat dissipating fins 34 may be configured by arranging a large number of thin plates perpendicular to the axis of the refrigerant pipe 33 with a space therebetween.

以上、本発明の実施形態につき説明したが、本発明の範囲はこれに限定されるものではなく、発明の主旨を逸脱しない範囲で種々の変更を加えて実施することができる。   Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention.

本発明は輻射式空気調和機に広く利用可能である。   The present invention is widely applicable to a radiant air conditioner.

1 輻射式空気調和機
10 室外機
11 筐体
12 圧縮機
13 四方弁
14 室外側熱交換器
15 膨張弁
16 室外側送風機
17、18 冷媒配管
25 温度検出器
30 輻射パネル
31 筐体
32 放熱部
35 開口部
37 温度検出器
38 ガード部材
40 制御部
50 循環ダクト
51 上部通風口
52 下部通風口
55 閉塞板
57 吸熱体
DESCRIPTION OF SYMBOLS 1 Radiation type air conditioner 10 Outdoor unit 11 Case 12 Compressor 13 Four-way valve 14 Outdoor heat exchanger 15 Expansion valve 16 Outdoor blower 17, 18 Refrigerant piping 25 Temperature detector 30 Radiation panel 31 Housing 32 Heat radiation part 35 Opening 37 Temperature detector 38 Guard member 40 Control unit 50 Circulating duct 51 Upper ventilation port 52 Lower ventilation port 55 Blocking plate 57 Heat absorber

Claims (5)

室内に配置される輻射パネルと、室外側熱交換器と、前記輻射パネル及び前記室外側熱交換器に冷媒配管を通じて冷媒を循環させる圧縮機とを備えた輻射式空気調和機において、
前記輻射パネルは筐体を備え、前記筐体には、前記冷媒が流れる放熱部と、上部と下部に通風口を有する循環ダクトが設けられており、前記放熱部はその少なくとも一部が前記循環ダクトの内部に露出し
前記放熱部は、前記筐体の内部に配置され、
前記循環ダクトの内部に、前記放熱部からの輻射熱を吸収し、その熱を前記循環ダクト内の空気に再放出する吸熱体が配置され、
前記吸熱体は、前記筐体の背壁と前記放熱部の間に配置されているとともに、前記筐体の背壁と前記放熱部から離れていることを特徴とする輻射式空気調和機。
In a radiant air conditioner comprising a radiant panel disposed indoors, an outdoor heat exchanger, and a compressor that circulates refrigerant through refrigerant piping through the radiant panel and the outdoor heat exchanger,
The radiation panel includes a housing, and the housing is provided with a heat radiating portion through which the refrigerant flows, and a circulation duct having ventilation holes at the upper and lower portions, and at least a part of the heat radiating portion circulates in the circulation. Exposed inside the duct ,
The heat dissipating part is disposed inside the housing,
Inside the circulation duct, a heat absorber that absorbs radiant heat from the heat radiating portion and re-releases the heat to the air in the circulation duct is disposed,
The heat absorber is disposed between the back wall of the casing and the heat radiating section, and is separated from the back wall of the casing and the heat radiating section .
前記筐体内に複数の前記放熱部が並列に配置されており、前記放熱部同士の間、または前記放熱部と前記筐体の間に生じた隙間を塞ぐ閉塞板が、前記筐体内に前記循環ダクトを区画形成する役割の一端を担うことを特徴とする請求項1に記載の輻射式空気調和機。   A plurality of the heat radiating portions are arranged in parallel in the housing, and a closing plate that closes a gap formed between the heat radiating portions or between the heat radiating portion and the housing is circulated in the housing. The radiant air conditioner according to claim 1, wherein the radiant air conditioner serves as one end of a role of partitioning the duct. 前記筐体の正面には前記放熱部より室内に熱を輻射させるための開口部が設けられ、この開口部にはガード部材が設けられていることを特徴とする請求項1又は請求項2に記載の輻射式空気調和機。 Wherein in front of the housing opening for radiating the heat provided in the indoor from the heat radiating portion, to claim 1 or claim 2, characterized in that the guard member is provided in the opening The radiation type air conditioner described. 当該輻射式空気調和機の制御部は、室内温度を検出する温度検出器が、冷房運転時に室内温度が所定温度以下になったことを検出したときと、暖房運転時に室内温度が所定温度以上になったことを検出したときに、前記圧縮機を停止させる制御を行うことを特徴とする請求項1からのいずれかに記載の輻射式空気調和機。 The control unit of the radiant air conditioner detects when the temperature detector that detects the room temperature detects that the room temperature is equal to or lower than a predetermined temperature during the cooling operation, and when the room temperature is higher than the predetermined temperature during the heating operation. The radiant air conditioner according to any one of claims 1 to 3 , wherein a control is performed to stop the compressor when it is detected. 当該輻射式空気調和機の制御部は、外気温を検出する温度検出器が、冷房運転モード設定時に外気温が所定温度以下になったことを検出したときと、暖房運転モード設定時に外気温が所定温度以上になったことを検出したときは、設定した運転モードでの運転を差し止めることを特徴とする請求項1からのいずれかに記載の輻射式空気調和機。 The control unit of the radiant air conditioner detects the outside air temperature when the temperature detector that detects the outside air temperature detects that the outside air temperature has become a predetermined temperature or less when the cooling operation mode is set, and when the outside air temperature is set when the heating operation mode is set. when it is detected that becomes equal to or greater than a predetermined temperature, radiant air conditioner according to any one of claims 1 to 4, characterized in that withhold operation in operating mode set.
JP2012117636A 2012-05-23 2012-05-23 Radiant air conditioner Expired - Fee Related JP5898568B2 (en)

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