JP5066022B2

JP5066022B2 - Air conditioning system

Info

Publication number: JP5066022B2
Application number: JP2008179498A
Authority: JP
Inventors: 隆司篠島; 卓古和田
Original assignee: Takenaka Corp
Current assignee: Takenaka Corp
Priority date: 2008-07-09
Filing date: 2008-07-09
Publication date: 2012-11-07
Anticipated expiration: 2028-07-09
Also published as: JP2010019473A

Description

本発明は、室内を冷暖房するための冷暖房システムに関する。 The present invention relates to a cooling / heating system for cooling / heating a room.

かかる冷暖房システムは、例えば、室内のインテリアゾーンに設けられ、蒸発器として機能させる冷房運転モードと凝縮器として機能させる暖房運転モードとの切り換えが個別に可能な複数の室内側熱交換器と、これら室内側熱交換器との間で冷媒を循環させて冷媒循環系の吸放熱収支をバランスさせるように蒸発器又は凝縮器として機能させて冷媒を外部の吸放熱源と熱交換させる外部熱源側熱交換器とを備えるヒートポンプ式の空気調和装置を設けて、インテリアゾーンを自由に冷暖房できるようにしたものである。
ちなみに、暖房運転モードの室内側熱交換器と冷房運転モードの室内側熱交換器とが混在する空調需要として、次のようなものがある。例えば、夏と冬の間の中間期において、南側の室内側熱交換器を冷房運転モードに切り換え、北側の室内側熱交換器を暖房運転モードに切り換えることがある。又は、室内がＯＡ室であるときには、ＯＡ機器や人間等から熱が発生するため、室内側熱交換器を冷房運転モードにすることが一般的であるが、小部屋等が設けられる場合には、小部屋の室内側熱交換器を暖房運転モードにすることがある。 Such an air conditioning system includes, for example, a plurality of indoor heat exchangers that are provided in an indoor interior zone and can be individually switched between a cooling operation mode that functions as an evaporator and a heating operation mode that functions as a condenser. External heat source side heat that functions as an evaporator or condenser to circulate the refrigerant between the indoor heat exchanger and balance the absorption / radiation balance of the refrigerant circulation system to exchange heat between the refrigerant and the external absorption / radiation source A heat pump type air conditioner including an exchanger is provided so that the interior zone can be freely cooled and heated.
By the way, there are the following air conditioning demands in which the indoor heat exchanger in the heating operation mode and the indoor heat exchanger in the cooling operation mode coexist. For example, in the intermediate period between summer and winter, the indoor indoor heat exchanger on the south side may be switched to the cooling operation mode, and the indoor indoor heat exchanger on the north side may be switched to the heating operation mode. Or, when the room is an OA room, heat is generated from OA equipment, humans, etc., so it is common to set the indoor heat exchanger to the cooling operation mode, but when a small room or the like is provided The indoor heat exchanger in the small room may be set to the heating operation mode.

ところで、室内温度及び外部空気に基づいて、外部に排出する排出室内空気と室内に導入する導入外部空気とを熱交換させる熱交換運転を可能にした換気装置を設けるものがある（例えば、特許文献１参照。）。そして、ヒートポンプ式の空気調和機と換気装置とを設けることにより、ヒートポンプ式の空気調和機が室内を冷暖房運転しながらも、換気装置が空調ロスを少なくできるように熱交換運転を行うことが考えられる。 By the way, there is one that provides a ventilator that enables heat exchange operation to exchange heat between exhausted indoor air discharged outside and introduced external air introduced indoors based on indoor temperature and external air (for example, Patent Documents). 1). Then, by providing a heat pump type air conditioner and a ventilation device, it is considered that the heat pump type air conditioner performs a heat exchange operation so that the ventilation device can reduce air conditioning loss while cooling and heating the room. It is done.

特開昭６１−２９５４４３号公報JP-A 61-295443

しかしながら、従来の冷暖房システムにおいては、ヒートポンプ式の空気調和機と換気装置とを夫々独立して設けるものであり、ヒートポンプ式の空気調和機の効率化を図る上で、いまだ改善の余地があった。 However, in the conventional air conditioning system, a heat pump type air conditioner and a ventilation device are provided independently, and there is still room for improvement in improving the efficiency of the heat pump type air conditioner. .

本発明は、上記実状に鑑みて為されたものであって、その目的は、ヒートポンプ式の空気調和機を効率良く運転できる冷暖房システムを提供する点にある。 This invention is made | formed in view of the said actual condition, The objective is to provide the air conditioning system which can drive | operate a heat pump type air conditioner efficiently.

本発明の冷暖房システムは、蒸発器として機能させる冷房運転モードと凝縮器として機能させる暖房運転モードとの切り換えが個別に可能な複数の室内側熱交換器と、これら室内側熱交換器との間で冷媒を循環させて冷媒循環系の吸放熱収支をバランスさせるように蒸発器又は凝縮器として機能させて冷媒を外部の吸放熱源と熱交換させる外部熱源側熱交換器とを備えるヒートポンプ式の空気調和装置を設けるとともに、室内空気を外部に排出するのに伴い外部空気を室内に導入する室内換気において、排出室内空気と導入外部空気とを熱交換させる熱交換運転を可能にした換気装置を設けてあるものであって、その第１特徴構成は、システム制御手段として、前記冷房運転モードにある前記室内側熱交換器の合計吸熱量と前記暖房運転モードにある前記室内側熱交換器の合計放熱量との差分に基づき、その差分が縮小する方向に前記換気装置の熱交換運転を制御する制御手段を設けてある点にある。 The cooling / heating system of the present invention includes a plurality of indoor heat exchangers that can be individually switched between a cooling operation mode that functions as an evaporator and a heating operation mode that functions as a condenser, and the indoor heat exchanger. A heat pump type heat exchanger comprising an external heat source side heat exchanger that functions as an evaporator or a condenser to circulate the refrigerant in order to balance the absorption / radiation balance of the refrigerant circulation system and exchange heat with the external absorption / radiation source. Provided with an air conditioner and a ventilation device that enables heat exchange operation for exchanging heat between the exhausted indoor air and the introduced external air in the indoor ventilation for introducing the external air into the room as the indoor air is exhausted to the outside. The first feature of the present invention is that, as system control means, the total heat absorption amount of the indoor heat exchanger in the cooling operation mode and the heating operation mode are set. Based on the difference between the total heat dissipation of the chamber inner heat exchanger in, in Aru that provided a control means for controlling the heat exchange operation of the ventilating device in a direction in which the difference is reduced.

本構成によれば、ヒートポンプ式の空気調和機と換気装置とを連係させて冷房運転モードの室内側熱交換器の合計吸熱量と暖房運転モードの室内側熱交換器の合計放熱量との差分が縮小する方向に換気装置の熱交換運転を制御することにより、ヒートポンプ式の空気調和機を効率良く運転できる。
つまり、例えば、室外が高温で室外側熱交換器にて熱を放出するのに多くのエネルギーが必要な場合において、冷房運転モードの室内側熱交換器にて奪った熱を暖房運転モードの室内側熱交換器にて極力多く放出することにより、室外側熱交換器にて放出する熱の量を極力少なくして、ヒートポンプ式の空気調和機を効率良く運転できる。又、冷房運転モードの室内側熱交換器の合計吸熱量と暖房運転モードの室内側熱交換器の合計放熱量との差分がゼロになるときには、室外側熱交換器に設けられた放熱ファンの作動が停止することになり、ヒートポンプ式の空気調和機を一層効率良く運転できる。 According to this configuration, the difference between the total heat absorption amount of the indoor heat exchanger in the cooling operation mode and the total heat dissipation amount of the indoor heat exchanger in the heating operation mode by linking the heat pump type air conditioner and the ventilation device. By controlling the heat exchanging operation of the ventilator in the direction in which the air pressure decreases, the heat pump type air conditioner can be operated efficiently.
That is, for example, when a large amount of energy is required to release heat by the outdoor heat exchanger when the outdoor temperature is high, the heat taken by the indoor heat exchanger in the cooling operation mode is removed from the room in the heating operation mode. By releasing as much as possible in the inner heat exchanger, the amount of heat released in the outdoor heat exchanger is reduced as much as possible, and the heat pump type air conditioner can be operated efficiently. When the difference between the total heat absorption amount of the indoor heat exchanger in the cooling operation mode and the total heat dissipation amount of the indoor heat exchanger in the heating operation mode becomes zero, the heat dissipation fan provided in the outdoor heat exchanger The operation is stopped, and the heat pump type air conditioner can be operated more efficiently.

本発明の第２特徴構成は、前記換気装置は、前記熱交換運転において前記排出室内空気と前記導入外部空気との熱交換量を連続的又は段階的に調整する回収量調整が可能な構成にし、前記制御手段は、前記差分が縮小する方向に前記換気装置の熱交換運転における前記回収量調整を実行する構成にしてある点を特徴とする。 According to a second characteristic configuration of the present invention, the ventilator is configured such that a recovery amount can be adjusted by continuously or stepwise adjusting a heat exchange amount between the exhaust room air and the introduction external air in the heat exchange operation. The control means is configured to perform the recovery amount adjustment in the heat exchange operation of the ventilation device in a direction in which the difference is reduced.

本構成によれば、排出室内空気と導入外部空気との熱交換量を連続的又は段階的に調整する回収量調整を実行することにより、冷房運転モードの室内側熱交換器の合計吸熱量と暖房運転モードの室内側熱交換器の合計放熱量とが等しくなり易く、ヒートポンプ式の空気調和機を一層効率良く運転できる。 According to this configuration, the total heat absorption amount of the indoor heat exchanger in the cooling operation mode is obtained by executing the recovery amount adjustment that continuously or stepwise adjusts the heat exchange amount between the exhausted indoor air and the introduced external air. The total heat radiation amount of the indoor heat exchanger in the heating operation mode is likely to be equal, and the heat pump type air conditioner can be operated more efficiently.

〔第１実施の形態〕
以下、本発明に係る冷暖房システムについて説明する。
図１、図２に示すように、冷暖房システムは、外部熱源側熱交換器としての室外側熱交換器１とその室外側熱交換器１に共に接続された複数の室内側熱交換器２とを備え、それら複数の室内側熱交換器２の夫々が、室内３を暖房する暖房運転モードと室内３を冷房する冷房運転モードとに個別に切り換え自在に構成されたヒートポンプ式の空気調和機Ａ、外部空気を室内３に流入自在な給気路８、室内空気を室外４に排出自在な排気路９、給気路８にて室外４から室内３に流入する導入外部空気と排気路９にて室内３から室外４に排出される排出室内空気とを熱交換させる熱交換運転を可能にした換気装置としての全熱交換器Ｂ、室内温度及び室外温度を検出する温度検出手段Ｃ、室内側熱交換器２の夫々の暖房負荷及び冷房負荷を検出する負荷検出手段Ｄと、温度検出手段Ｃ及び負荷検出手段Ｄの検出情報に基づいて全熱交換器Ｂの作動を制御する制御手段としての制御装置Ｈと、を備えている。尚、図１は、冷暖房システムの概略図を示すものであり、天井面は示していない。 [First embodiment]
Hereinafter, an air conditioning system according to the present invention will be described.
As shown in FIGS. 1 and 2, an air conditioning system includes an outdoor heat exchanger 1 as an external heat source side heat exchanger and a plurality of indoor heat exchangers 2 connected together to the outdoor heat exchanger 1. A heat pump type air conditioner A in which each of the plurality of indoor heat exchangers 2 is individually switchable between a heating operation mode for heating the room 3 and a cooling operation mode for cooling the room 3. An air supply path 8 through which the outside air can flow into the room 3, an exhaust path 9 through which the room air can be discharged outside the room 4, and an introduction external air that flows into the room 3 from the outside 4 through the air supply path 8 and the exhaust path 9. A total heat exchanger B as a ventilator that enables heat exchange operation for exchanging heat with the exhausted indoor air discharged from the indoor 3 to the outdoor 4, temperature detecting means C for detecting the indoor temperature and the outdoor temperature, and the indoor side Detect the heating load and cooling load of each heat exchanger 2 It includes a load detecting means D, a controller H as control means for controlling the operation of the total heat exchanger B on the basis of the detection information of the temperature detecting means C and the load detecting means D, and. In addition, FIG. 1 shows the schematic of an air conditioning system, and the ceiling surface is not shown.

（空気調和機の構成）
前記空気調和機Ａは、冷媒を外部の吸放熱源としての外部空気と熱交換させる室外側熱交換器１と、冷媒を室内空気と熱交換させる複数の室内側熱交換器２（本実施形態では２つ）と、分流コントローラ５と、室外側熱交換器１の側の冷媒配管６と、室内側熱交換器２の側の冷媒配管７と、を備えている。室外側熱交換器１と分流コントローラ５とが３本の冷媒配管６にて接続され、分流コントローラ５と複数の室内側熱交換器２の夫々とが２本の冷媒配管７にて接続されている。これら冷媒配管６及び冷媒配管７が、高圧の気体の冷媒、低圧の気体の冷媒、及び、液体の冷媒を循環させる冷媒回路を構成してある。 (Configuration of air conditioner)
The air conditioner A includes an outdoor heat exchanger 1 that exchanges heat between the refrigerant and external air serving as an external heat sink, and a plurality of indoor heat exchangers 2 that exchange heat between the refrigerant and indoor air (this embodiment). 2), a flow dividing controller 5, a refrigerant pipe 6 on the outdoor heat exchanger 1 side, and a refrigerant pipe 7 on the indoor heat exchanger 2 side. The outdoor heat exchanger 1 and the shunt controller 5 are connected by three refrigerant pipes 6, and the shunt controller 5 and each of the plurality of indoor heat exchangers 2 are connected by two refrigerant pipes 7. Yes. The refrigerant pipe 6 and the refrigerant pipe 7 constitute a refrigerant circuit for circulating a high-pressure gas refrigerant, a low-pressure gas refrigerant, and a liquid refrigerant.

前記室内側熱交換器２を冷房運転モードに切り換えると、室外側熱交換器１が備える圧縮機（図示しない）を作動させ、分流コントローラ５を制御して、液体の冷媒を室内側熱交換器２へ流通させる。そうすると、室内側熱交換器２が蒸発器として機能し、室内側熱交換器２を通流する液体の冷媒が蒸発して低圧の気体になり、周囲から熱を奪う。又、室内側熱交換器２を暖房運転モードに切り換えると、室外側熱交換器１の図示しない圧縮機を作動させ、分流コントローラ５を制御して、高圧の気体の冷媒を室内側熱交換器２へ流通させる。そうすると、室内側熱交換器２が凝縮器として機能し、室内側熱交換器２を通流する高圧の気体の冷媒が凝縮して液体になり、熱を周囲に放出する。そして、２つの室内側熱交換器２のうち一方が冷房運転モードであり、他方が暖房運転モードである場合には、一方の室内側熱交換器２にて奪った熱の一部を他方の室内側熱交換器２にて放出し、残りの熱を室外側熱交換器１にて放出することになる。 When the indoor heat exchanger 2 is switched to the cooling operation mode, a compressor (not shown) provided in the outdoor heat exchanger 1 is operated, and the shunt controller 5 is controlled so that the liquid refrigerant is supplied to the indoor heat exchanger. 2 to distribute. Then, the indoor heat exchanger 2 functions as an evaporator, and the liquid refrigerant flowing through the indoor heat exchanger 2 evaporates into a low-pressure gas, which takes heat away from the surroundings. When the indoor heat exchanger 2 is switched to the heating operation mode, the compressor (not shown) of the outdoor heat exchanger 1 is operated and the shunt controller 5 is controlled so that the high-pressure gaseous refrigerant is supplied to the indoor heat exchanger. 2 to distribute. Then, the indoor heat exchanger 2 functions as a condenser, and the high-pressure gaseous refrigerant flowing through the indoor heat exchanger 2 condenses into a liquid and releases heat to the surroundings. When one of the two indoor heat exchangers 2 is in the cooling operation mode and the other is in the heating operation mode, part of the heat taken away by the one indoor heat exchanger 2 is transferred to the other The heat is released by the indoor heat exchanger 2 and the remaining heat is released by the outdoor heat exchanger 1.

（熱交換器の構成）
前記全熱交換器Ｂは、切換用モータＭの駆動軸に取り付けられた切換弁１２を備えており、切換弁１２の切り換え動作により、導入外部空気と排出室内空気との間で熱交換を行なう熱交換換気運転モードと、導入外部空気と排出室内空気との間で熱交換を行なわない普通換気運転モードとに切り換え自在に構成されている。 (Configuration of heat exchanger)
The total heat exchanger B includes a switching valve 12 attached to the drive shaft of the switching motor M, and performs heat exchange between the introduced external air and the discharge indoor air by the switching operation of the switching valve 12. It is configured to be switchable between a heat exchange ventilation operation mode and a normal ventilation operation mode in which heat exchange is not performed between the introduced external air and the discharge room air.

（給気路及び排気路の構成）
前記全熱交換器Ｂには、外部空気を室内３に流入自在な給気路８と、室内空気を室外４に排出自在な排気路９とが設けられている。給気路８は、室外４と全熱交換器Ｂにおける室外側に開口する給気口とを接続する第１給気路部分８ａと、一端が全熱交換器Ｂにおける室内側に開口する排気口に接続する第２給気路部分８ｂと、一端が第２給気路部分８ｂの他端に分岐する状態で接続するとともに、他端が夫々の室内側熱交換器２の給気口の近傍に位置する複数の第３給気路部分８ｃとを備えている。排気路９は、室外４と全熱交換器Ｂにおける室外側に開口する排気口とを接続する第１排気路部分９ａと、一端が全熱交換器Ｂにおける室内側に開口する給気口に接続する第２排気路部分９ｂとを備えている。そして、室内側熱交換器２の排気口と吹出口とを接続するダクト１１が設けられている。 (Configuration of air supply and exhaust passages)
The total heat exchanger B is provided with an air supply path 8 through which external air can flow into the room 3 and an exhaust path 9 through which room air can be discharged outside the room 4. The air supply path 8 includes a first air supply path portion 8a that connects the outdoor 4 and an air supply opening that opens to the outside of the total heat exchanger B, and an exhaust that has one end opening to the indoor side of the total heat exchanger B. The second air supply passage portion 8b connected to the opening is connected to one end of the second air supply passage portion 8b branched to the other end of the second air supply passage portion 8b, and the other end is connected to the air supply opening of each indoor heat exchanger 2. And a plurality of third air supply passage portions 8c located in the vicinity. The exhaust path 9 includes a first exhaust path portion 9a that connects the outdoor 4 and an exhaust port that opens to the outside of the total heat exchanger B, and an air supply port that has one end that opens to the indoor side of the total heat exchanger B. And a second exhaust passage portion 9b to be connected. And the duct 11 which connects the exhaust port and blower outlet of the indoor side heat exchanger 2 is provided.

（温度検出手段、及び、負荷検出手段の構成）
前記室内側熱交換器２の給気口には、給気温度センサＳ１が設置されている。室内側熱交換器２の排気口には、排気温度センサＳ２及び風量センサＳ３が設置されている。制御装置Ｈが、それらセンサＳ１〜Ｓ３の入力情報に基づいて、室内側熱交換器２の夫々の暖房負荷（放熱量）及び冷房負荷（吸熱量）を演算する。したがって、給気温度センサＳ１、排気温度センサＳ２、風量センサＳ３、制御装置Ｈが、室内側熱交換器２の夫々の暖房負荷及び冷房負荷を検出する負荷検出手段Ｄを構成することになる。又、室外４には、室外温度センサＳ４が設置されると共に、室内３には、室内温度センサＳ５が設置されている。したがって、それらセンサＳ４、Ｓ５が、室内温度及び室外温度を検出する温度検出手段Ｃを構成することになる。 (Configuration of temperature detection means and load detection means)
An air supply temperature sensor S <b> 1 is installed at the air supply port of the indoor heat exchanger 2. At the exhaust port of the indoor heat exchanger 2, an exhaust temperature sensor S2 and an air volume sensor S3 are installed. The control device H calculates the heating load (heat radiation amount) and the cooling load (heat absorption amount) of the indoor heat exchanger 2 based on the input information of the sensors S1 to S3. Therefore, the supply air temperature sensor S1, the exhaust gas temperature sensor S2, the air volume sensor S3, and the control device H constitute load detecting means D that detects the heating load and the cooling load of the indoor heat exchanger 2, respectively. In addition, an outdoor temperature sensor S4 is installed in the outdoor 4 and an indoor temperature sensor S5 is installed in the indoor 3. Therefore, these sensors S4 and S5 constitute temperature detecting means C for detecting the indoor temperature and the outdoor temperature.

次に、本発明に係る冷暖房システムの制御構成について説明する。
図２に示すように、給気温度センサＳ１、排気温度センサＳ２、風量センサＳ３、室外温度センサＳ４、室内温度センサＳ５等が備えられ、これらセンサＳ１〜Ｓ５の入力情報に基づいて切換用モータＭの動作を制御する制御装置Ｈが備えられている。
そして、制御手段Ｈが、暖房運転モードの室内側熱交換器２と冷房運転モードの室内側熱交換器２とが混在している場合において、暖房運転モードの室内側熱交換器２の夫々の暖房負荷を足し合わせた暖房負荷合計値（合計放熱量）と、冷房運転モードの室内側熱交換器２の夫々の冷房負荷を足し合わせた冷房負荷合計値（合計吸熱量）との差分が縮小する方向に、全熱交換器Ｂの熱交換運転を制御する負荷平準化運転を実行するように構成されている。
又、制御手段Ｈが、負荷平準化運転として、冷房負荷合計値が暖房負荷合計値よりも大きい場合で、且つ、室外温度が室内温度よりも高いときには、熱交換換気運転モードに切り換え、室外温度が室内温度よりも低いときには、普通換気運転モードに切り換えるように構成され、冷房負荷合計値が暖房負荷合計値よりも小さい場合で、且つ、室外温度が室内温度よりも高いときには、普通換気運転モードに切り換え、室外温度が室内温度よりも低いときには、熱交換換気運転モードに切り換えるように構成されている。 Next, the control configuration of the air conditioning system according to the present invention will be described.
As shown in FIG. 2, a supply air temperature sensor S1, an exhaust gas temperature sensor S2, an air volume sensor S3, an outdoor temperature sensor S4, an indoor temperature sensor S5, and the like are provided, and a switching motor based on input information of these sensors S1 to S5. A control device H for controlling the operation of M is provided.
And when the control means H has the indoor side heat exchanger 2 of heating operation mode and the indoor side heat exchanger 2 of cooling operation mode mixed, each of the indoor side heat exchanger 2 of heating operation mode is each The difference between the total heating load (total heat dissipation), which is the sum of the heating loads, and the total cooling load (total heat absorption), which is the sum of the cooling loads of the indoor heat exchangers 2 in the cooling operation mode, is reduced. The load leveling operation for controlling the heat exchange operation of the total heat exchanger B is executed in the direction in which the heat exchange is performed.
Further, the control means H switches to the heat exchange ventilation operation mode when the cooling load total value is larger than the heating load total value and the outdoor temperature is higher than the indoor temperature as the load leveling operation. Is switched to the normal ventilation operation mode when the room temperature is lower than the room temperature, and the normal ventilation operation mode is selected when the cooling load total value is smaller than the heating load total value and the outdoor temperature is higher than the room temperature. When the outdoor temperature is lower than the indoor temperature, it is configured to switch to the heat exchange ventilation operation mode.

次に、冷暖房システムの制御を図３のフローチャートに基づいて説明する。
室内側熱交換器２が運転中であるか否かをチェックして（ステップ１）、運転中の室内側熱交換器２の全てが冷房運転モード及び暖房運転モードでない（ステップ２、３）、言い換えると、暖房運転モードの室内側熱交換器２（室内機）と冷房運転モードの室内側熱交換器２とが混在している状態であれば、暖房運転モードの室内側熱交換器２の夫々の暖房負荷ｂ１、ｂ２、…を演算するとともに、冷房運転モードの室内側熱交換器２の夫々の冷房負荷ａ１、ａ２、…を演算し（ステップ４）、暖房運転モードの室内側熱交換器２の夫々の暖房負荷ｂ１、ｂ２、…を足し合わせた暖房負荷合計値ｂ（ｔｏｔ）、及び、冷房運転モードの室内側熱交換器２の夫々の冷房負荷ａ１、ａ２、…を足し合わせた冷房負荷合計値ａ（ｔｏｔ）を演算する（ステップ５）。 Next, control of the air conditioning system will be described based on the flowchart of FIG.
It is checked whether or not the indoor heat exchanger 2 is in operation (step 1), and all of the indoor heat exchangers 2 in operation are not in the cooling operation mode and the heating operation mode (steps 2 and 3), In other words, if the indoor heat exchanger 2 (indoor unit) in the heating operation mode and the indoor heat exchanger 2 in the cooling operation mode are mixed, the indoor heat exchanger 2 in the heating operation mode The respective heating loads b1, b2,... Are calculated, and the respective cooling loads a1, a2,... Of the indoor heat exchanger 2 in the cooling operation mode are calculated (step 4), and the indoor heat exchange in the heating operation mode is calculated. The heating load total value b (tot) obtained by adding the heating loads b1, b2,... Of the cooler 2 and the cooling loads a1, a2,... Of the indoor heat exchanger 2 in the cooling operation mode are added. Calculate the total cooling load a (tot) Step 5).

そして、冷房負荷合計値ａ（ｔｏｔ）が暖房負荷合計値ｂ（ｔｏｔ）よりも大きい場合で、且つ、室外温度Ｈｅｘｔが室内温度Ｈｉｎｔよりも高いときには、熱交換換気運転モードに切り換え、その状態を一定時間（５分程度から１０分程度）維持する（ステップ６、１０、１１）。室外温度Ｈｅｘｔが室内温度Ｈｉｎｔよりも低いときには、普通換気運転モードに切り換え、その状態を一定時間（５分程度から１０分程度）維持する（ステップ６、１０、１２）。冷房負荷合計値ａ（ｔｏｔ）が暖房負荷合計値ｂ（ｔｏｔ）よりも小さい場合で、且つ、室外温度Ｈｅｘｔが室内温度Ｈｉｎｔよりも高いときには、普通換気運転モードに切り換え、その状態を一定時間（５分程度から１０分程度）維持する（ステップ６、７，９）。室外温度Ｈｅｘｔが室内温度Ｈｉｎｔよりも低いときには、熱交換換気運転モードに切り換え、その状態を一定時間（５分程度から１０分程度）維持する（ステップ６、７、８）。 When the cooling load total value a (tot) is larger than the heating load total value b (tot) and the outdoor temperature Hext is higher than the indoor temperature Hint, the mode is switched to the heat exchange ventilation operation mode. It is maintained for a certain time (about 5 to 10 minutes) (steps 6, 10, and 11). When the outdoor temperature Hext is lower than the indoor temperature Hint, the mode is switched to the normal ventilation operation mode, and the state is maintained for a certain period of time (about 5 to 10 minutes) (steps 6, 10, and 12). When the cooling load total value a (tot) is smaller than the heating load total value b (tot) and the outdoor temperature Hext is higher than the indoor temperature Hint, the mode is switched to the normal ventilation operation mode, and the state is changed for a certain time ( (Steps 6, 7, and 9). When the outdoor temperature Hext is lower than the indoor temperature Hint, the mode is switched to the heat exchange ventilation operation mode, and the state is maintained for a certain time (about 5 to 10 minutes) (steps 6, 7, and 8).

運転中の室内側熱交換器２の全てが冷房運転モードである場合には、室外温度Ｈｅｘｔが室内温度Ｈｉｎｔよりも高いときには、熱交換換気運転モードに切り換え、その状態を一定時間（５分程度から１０分程度）維持する（ステップ２、１３、１５）。室外温度Ｈｅｘｔが室内温度Ｈｉｎｔよりも低いときには、普通換気運転モードに切り換え、その状態を一定時間（５分程度から１０分程度）維持する（ステップ２、１３、１４）。運転中の室内側熱交換器２の全てが暖房運転モードである場合には、室外温度Ｈｅｘｔが室内温度Ｈｉｎｔよりも高いときには、普通換気運転モードに切り換え、その状態を一定時間（５分程度から１０分程度）維持する（ステップ３、１６、１８）。室外温度Ｈｅｘｔが室内温度Ｈｉｎｔよりも低いときには、熱交換換気運転モードに切り換え、その状態を一定時間（５分程度から１０分程度）維持する（ステップ３、１６、１７）。 When all of the indoor heat exchangers 2 in operation are in the cooling operation mode, when the outdoor temperature Hext is higher than the indoor temperature Hint, the operation is switched to the heat exchange ventilation operation mode, and the state is changed for a certain time (about 5 minutes). For about 10 minutes) (steps 2, 13, 15). When the outdoor temperature Hext is lower than the indoor temperature Hint, the mode is switched to the normal ventilation operation mode, and the state is maintained for a certain period of time (about 5 minutes to 10 minutes) (steps 2, 13, and 14). When all the indoor heat exchangers 2 in operation are in the heating operation mode, when the outdoor temperature Hext is higher than the indoor temperature Hint, the operation mode is switched to the normal ventilation operation mode, and the state is changed for a certain time (from about 5 minutes). (Steps 3, 16, and 18). When the outdoor temperature Hext is lower than the indoor temperature Hint, the mode is switched to the heat exchange ventilation operation mode, and this state is maintained for a certain period of time (about 5 to 10 minutes) (steps 3, 16, and 17).

次に、冷暖房システムの具体的な動作について図１に基づいて説明する。
室外温度Ｈｅｘｔが室内温度Ｈｉｎｔよりも高いとする。このとき、全熱交換器Ｂを熱交換換気運転モードに切り換えたときの給気温度が普通換気運転モードに切り換えたときの給気温度よりも低くなる。室内側熱交換器２の一方が冷房運転モードで、他方が暖房運転モードのときにおいて、給気温度センサＳ１、排気温度センサＳ２、風量センサＳ３から演算した一方の室内側熱交換器２の冷房負荷ａが、他方の室内側熱交換器２の暖房負荷ｂよりも大きい（ａ＞ｂ）ときには、全熱交換器Ｂを熱交換換気運転モードに切り換えることにより、一方の室内側熱交換器２の冷房負荷ａを減少させて、他方の室内側熱交換器２の暖房負荷ｂを増大させる。 Next, a specific operation of the air conditioning system will be described with reference to FIG.
It is assumed that the outdoor temperature Hext is higher than the indoor temperature Hint. At this time, the supply air temperature when the total heat exchanger B is switched to the heat exchange ventilation operation mode is lower than the supply air temperature when the total heat exchanger B is switched to the normal ventilation operation mode. When one of the indoor heat exchangers 2 is in the cooling operation mode and the other is in the heating operation mode, the cooling of one of the indoor heat exchangers 2 calculated from the supply air temperature sensor S1, the exhaust gas temperature sensor S2, and the air volume sensor S3. When the load a is larger than the heating load b of the other indoor heat exchanger 2 (a> b), by switching the total heat exchanger B to the heat exchange ventilation operation mode, one indoor heat exchanger 2 Is reduced, and the heating load b of the other indoor heat exchanger 2 is increased.

これにより、例えば、室外４が高温で室外側熱交換器１にて熱を放出するのに多くのエネルギーが必要な場合において、冷房運転モードの室内側熱交換器２にて奪った熱を暖房運転モードの室内側熱交換器２にて極力多く放出することにより、室外側熱交換器１にて放出する熱の量を極力少なくして、ヒートポンプ式の空気調和機Ａを効率良く運転できる。又、冷房運転モードの室内側熱交換器２の合計吸熱量と暖房運転モードの室内側熱交換器２の合計放熱量との差分がゼロになるときには、室外側熱交換器１に設けられた放熱ファンの作動が停止することになり、ヒートポンプ式の空気調和機Ａを一層効率良く運転できる。 Thereby, for example, when a large amount of energy is required to release heat at the outdoor heat exchanger 1 at a high temperature in the outdoor 4, the heat taken by the indoor heat exchanger 2 in the cooling operation mode is heated. By releasing as much as possible in the indoor heat exchanger 2 in the operation mode, the amount of heat released in the outdoor heat exchanger 1 can be reduced as much as possible, and the heat pump air conditioner A can be operated efficiently. In addition, when the difference between the total heat absorption amount of the indoor heat exchanger 2 in the cooling operation mode and the total heat dissipation amount of the indoor heat exchanger 2 in the heating operation mode becomes zero, the outdoor heat exchanger 1 is provided. The operation of the heat dissipating fan is stopped, and the heat pump type air conditioner A can be operated more efficiently.

〔別実施の形態〕
（１）上記実施の形態では、複数の室内側熱交換器２に対して１つの全熱交換器Ｂを設ける構成を例示したが、これに限られるものではなく、複数の室内側熱交換器２の夫々に対して複数の全熱交換器Ｂの夫々を設けてもよい。 [Another embodiment]
(1) In the above embodiment, the configuration in which one total heat exchanger B is provided for a plurality of indoor heat exchangers 2 is exemplified, but the present invention is not limited to this, and a plurality of indoor heat exchangers are provided. A plurality of total heat exchangers B may be provided for each of the two.

（２）上記実施の形態では、給気温度センサＳ１の給気温度、排気温度センサＳ２の排気温度、風量センサＳ３の風量に基づいて室内側熱交換器２の夫々の暖房負荷及び冷房負荷を演算する構成を例示したが、このような構成に代えて、分流コントローラが備える弁の開度に基づいて室内側熱交換器２の夫々の暖房負荷及び冷房負荷を演算してもよい。 (2) In the above embodiment, the heating load and the cooling load of the indoor heat exchanger 2 are determined based on the supply air temperature of the supply air temperature sensor S1, the exhaust gas temperature of the exhaust gas temperature sensor S2, and the air volume of the air volume sensor S3. Although the structure which calculates is illustrated, it replaces with such a structure and you may calculate each heating load and cooling load of the indoor side heat exchanger 2 based on the opening degree of the valve with which a shunt controller is provided.

（３）上記実施の形態では、換気装置が全熱交換器Ｂである構成を例示したが、これに代えて、換気装置が顕熱交換器Ｂであってもよい。 (3) In the above-described embodiment, the configuration in which the ventilator is the total heat exchanger B is illustrated, but the ventilator may be the sensible heat exchanger B instead.

（４）上記実施の形態では、外部熱源側熱交換器が冷媒を外部の吸放熱源としての外部空気と熱交換させる構成を例示したが、これに限られるものではなく、外部熱源側熱交換器が冷媒を外部の吸放熱源としての貯湯タンク内の湯水と熱交換させる構成であってもよい。 (4) In the above embodiment, the configuration in which the external heat source side heat exchanger exchanges heat between the refrigerant and the external air as an external heat absorption / dissipation source is exemplified, but the present invention is not limited to this, and the external heat source side heat exchange is performed. The unit may be configured to exchange heat between the refrigerant and hot water in a hot water storage tank as an external heat sink.

（５）上記実施の形態では、全熱交換器Ｂが、外部空気と室内空気との間で熱交換を行なう熱交換換気運転モードと、外部空気と室内空気との間で熱交換を行なわない普通換気運転モードとに切り換え可能である構成を例示したが、これに限られるものではなく、全熱交換器Ｂが、同一条件下での外部空気と室内空気との熱交換量を連続的又は段階的に調整する回収量調整が可能である構成としてもよい。尚、同一条件とは、室外温度、室内温度、導入外部空気及び排出室内空気の風量、湿度等が同じときの条件である。 (5) In the above embodiment, the total heat exchanger B does not perform heat exchange between the heat exchange ventilation operation mode in which heat exchange is performed between the external air and the room air, and between the external air and the room air. Although the configuration that can be switched to the normal ventilation operation mode is illustrated, the present invention is not limited to this, and the total heat exchanger B continuously or heat exchanges the external air and the indoor air under the same conditions. It is good also as a structure which can adjust the collection amount adjusted in steps. In addition, the same conditions are conditions when the outdoor temperature, the indoor temperature, the air volume, the humidity, and the like of the introduced external air and the exhausted indoor air are the same.

（６）上記実施の形態では、１つの室内３に対して複数の室内側熱交換器２を設置する構成を例示したが、これに限られるものではなく、複数の室内３の夫々に対して複数の室内側熱交換器２の夫々を設置してもよい。 (6) In the above embodiment, the configuration in which a plurality of indoor heat exchangers 2 are installed in one room 3 is exemplified, but the present invention is not limited to this, and each of the plurality of rooms 3 is provided. Each of the plurality of indoor heat exchangers 2 may be installed.

（７）上記実施の形態では、給気温度センサＳ１、排気温度センサＳ２、風量センサＳ３の入力情報に基づいて、室内側熱交換器２の夫々の暖房負荷（放熱量）及び冷房負荷（吸熱量）を演算する構成を例示したが、さらに湿度センサを設けて、湿度センサ、給気温度センサＳ１、排気温度センサＳ２、風量センサＳ３の入力情報に基づいて、室内側熱交換器２の夫々の暖房負荷（放熱量）及び冷房負荷（吸熱量）を演算してもよい。つまり、水蒸気のエンタルピーを考慮することにより一層精度よく負荷を演算することができる。 (7) In the above embodiment, based on the input information of the supply air temperature sensor S1, the exhaust gas temperature sensor S2, and the air flow rate sensor S3, the heating load (heat radiation amount) and the cooling load (suction amount) of the indoor heat exchanger 2 are determined. The configuration for calculating the amount of heat) is illustrated, but a humidity sensor is further provided, and each of the indoor heat exchanger 2 is based on input information of the humidity sensor, the supply air temperature sensor S1, the exhaust gas temperature sensor S2, and the air volume sensor S3. The heating load (heat radiation amount) and the cooling load (heat absorption amount) may be calculated. In other words, the load can be calculated with higher accuracy by considering the enthalpy of water vapor.

冷暖房システムの概略図Schematic of air conditioning system 冷暖房システムのブロック図Air conditioning system block diagram 冷暖房システムのフロー図Flow diagram of air conditioning system

Explanation of symbols

１室外機
２室内側熱交換器
３室内
４室外
Ａ空気調和機
Ｂ熱交換器
Ｃ温度検出手段
Ｄ負荷検出手段
Ｈ制御手段 DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 Indoor side heat exchanger 3 Indoor 4 Outdoor A A Air conditioner B Heat exchanger C Temperature detection means D Load detection means H Control means

Claims

A plurality of indoor heat exchangers that can be individually switched between a cooling operation mode that functions as an evaporator and a heating operation mode that functions as a condenser, and the refrigerant is circulated between the indoor heat exchangers. While providing a heat pump type air conditioner including an external heat source side heat exchanger that functions as an evaporator or a condenser so as to balance the absorption and radiation balance of the circulation system and exchanges heat between the refrigerant and an external absorption and radiation source,
This is an air conditioning system provided with a ventilator that enables heat exchange operation to exchange heat between the exhausted indoor air and the introduced external air in the indoor ventilation in which the external air is introduced indoors as the indoor air is exhausted to the outside. And
As a system control means, based on the difference between the total heat absorption amount of the indoor heat exchanger in the cooling operation mode and the total heat dissipation amount of the indoor heat exchanger in the heating operation mode, the direction in which the difference decreases The air conditioning system which is provided with the control means which controls the heat exchange driving | operation of the said ventilator.

In the heat exchange operation, the ventilator is configured to be able to adjust a recovery amount by continuously or stepwise adjusting a heat exchange amount between the exhaust room air and the introduction external air, and the control unit is configured to determine whether the difference is The air conditioning system according to claim 1, wherein the recovery amount adjustment in the heat exchange operation of the ventilator is executed in the direction of reduction.