JP6221058B2 - Air conditioning system - Google Patents
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Description
本発明は、暖房運転時に熱交換型換気扇と空調機を併用運転する空調システムに関する。 The present invention relates to an air conditioning system that operates in combination with a heat exchange type ventilation fan and an air conditioner during heating operation.
従来の暖房運転時の熱交換型換気扇と空調機の空調システムについては、屋内と屋外の温度を比較して、熱交換型換気扇の運転を熱交運転と普通換気運転で切替え省エネルギー化を図るものがある。（例えば、特許文献１参照）。 Compared to indoor and outdoor temperatures for conventional heat exchange ventilation fans and air conditioning systems during heating operation, the heat exchange ventilation fans can be switched between heat exchange and normal ventilation to save energy. There is. (For example, refer to Patent Document 1).
以下、図４を用いてその構成を説明する。部屋を空調するための空調機１０１、１０２、熱交換運転を行うための熱交換型換気扇１０３、１０４、熱交換型換気扇１０３、１０４を運転するための運転盤１０５、１０６、室内温度を測定するための室内温度センサ１０７、１０８、外気温度を測定するための外気温度センサ１０９、１１０から構成されている。 The configuration will be described below with reference to FIG. Air conditioners 101 and 102 for air conditioning the room, heat exchange type ventilation fans 103 and 104 for performing heat exchange operation, operation panels 105 and 106 for operating the heat exchange type ventilation fans 103 and 104, and the room temperature are measured. Indoor temperature sensors 107 and 108 for measuring the outside air temperature sensors 109 and 110 for measuring the outside air temperature.
空調機１０１と熱交換型換気扇１０３、運転盤１０５、室内温度センサ１０７、外気温度センサ１０９から構成される空調システムを１１１とし、残りの空調機１０２と熱交換型換気扇１０４、運転盤１０６、室内温度センサ１０８、外気温度センサ１１０から構成されるもう一組の空調システムを１１２とする。 An air conditioning system including an air conditioner 101, a heat exchange type ventilation fan 103, an operation panel 105, an indoor temperature sensor 107, and an outside air temperature sensor 109 is assumed to be 111, and the remaining air conditioner 102, a heat exchange type ventilation fan 104, an operation panel 106, an indoor Another set of air conditioning system composed of the temperature sensor 108 and the outside air temperature sensor 110 is denoted by 112.
空調システム１１１において、空調機１０１の暖房運転時に室内温度センサ１０７と外気温度センサ１０９の測定結果を運転盤１０５で比較して、外気温度が室内温度よりも低い場合は熱交換型換気扇１０３の運転を普通換気から熱交換運転に切り替える。逆に、外気温度が室内温度よりも高い場合は、熱交換型換気扇１０３の運転を熱交換運転から普通換気に切替える。空調システム１１２も同様の動作をするものであり、室内温度と外気温度の比較により熱交換型換気扇の運転を切替えて省エネルギー化を図る、というものである。 In the air conditioning system 111, the measurement results of the indoor temperature sensor 107 and the outside air temperature sensor 109 are compared by the operation panel 105 during the heating operation of the air conditioner 101. If the outside air temperature is lower than the room temperature, the heat exchange type exhaust fan 103 is operated. Switch from normal ventilation to heat exchange operation. Conversely, when the outside air temperature is higher than the room temperature, the operation of the heat exchange type ventilation fan 103 is switched from the heat exchange operation to the normal ventilation. The air conditioning system 112 also performs the same operation, and is intended to save energy by switching the operation of the heat exchange type ventilation fan by comparing the indoor temperature and the outside air temperature.
一般に、熱交換型換気扇は熱交換効率が高くなるほど熱回収量が増加し、熱交換効率は室内温湿度、外気温湿度、給気温湿度に応じて常時変化する。また、熱交換型換気扇は外気温度が低くなるほど熱回収量が増加する傾向にあるが、同じ外気温度であっても湿度のその他の条件により、熱交換効率が増減する。一方、空調機は外気温度が高くなるほど成績係数が上昇する。 In general, as the heat exchange efficiency of the heat exchange ventilator increases, the amount of heat recovery increases, and the heat exchange efficiency constantly changes according to the indoor temperature humidity, the outside air temperature humidity, and the supply air temperature humidity. Further, the heat exchange type ventilation fan tends to increase the amount of heat recovery as the outside air temperature decreases, but the heat exchange efficiency increases or decreases depending on other conditions of humidity even at the same outside air temperature. On the other hand, the coefficient of performance of the air conditioner increases as the outside air temperature increases.
従来の発明では、上記のような熱交換型換気扇と空調機の特性の傾向を利用して、ある外気温度に達した時点で、熱交換型換気扇の熱回収より空調機稼動による熱量のほうが大きい、との判断から、熱交換換気から普通換気に切替えて省エネを図っている。 In the conventional invention, using the tendency of the characteristics of the heat exchanging ventilator and the air conditioner as described above, when the temperature reaches a certain outside air temperature, the amount of heat generated by operating the air conditioner is larger than the heat recovery of the heat exchanging ventilator. Therefore, energy saving is achieved by switching from heat exchange ventilation to normal ventilation.
しかしながら、上述したとおり、熱回収量は同じ外気温度であっても湿度その他条件により増減している。従って、外気温度が同じであっても、熱回収量が空調機稼動による熱量を上回ることもあれば下回ることもある。すなわち、従来の発明は、熱回収量が空調機稼動による熱量を上回っている状態で普通換気に切替えてしまうこともありえて、真に省
エネを図れた併用運転とは言えない。
However, as described above, the amount of heat recovery varies depending on humidity and other conditions even at the same outside air temperature. Therefore, even if the outside air temperature is the same, the heat recovery amount may be higher or lower than the heat amount due to the operation of the air conditioner. That is, the conventional invention may be switched to normal ventilation in a state where the heat recovery amount exceeds the heat amount due to the operation of the air conditioner, and cannot be said to be a combined operation that can truly save energy.
本発明は上記のような従来の課題を解決するものであり、熱交換型換気扇の熱回収量と、空調機の成績係数、および熱交換換気と普通換気の消費電力差（以下差電力）から計算できる空調機の差電力分の暖房出力量を常時演算し比較して、その結果に応じて熱交換換気と普通換気を切替える。これにより、熱交換換気と普通換気の切替えを正確に判定し、熱量ロスのない、確実な省エネを行える空調システムを提供することができる。 The present invention solves the conventional problems as described above, from the heat recovery amount of the heat exchange type ventilation fan, the coefficient of performance of the air conditioner, and the power consumption difference between heat exchange ventilation and normal ventilation (hereinafter referred to as the difference power). It constantly calculates and compares the heating output amount for the difference power of the air conditioner that can be calculated, and switches between heat exchange ventilation and normal ventilation according to the result. Accordingly, it is possible to provide an air conditioning system that can accurately determine switching between heat exchange ventilation and normal ventilation and can reliably save energy without loss of heat.
本発明は、
室内の排気と給気の熱交換を行う熱交換型換気扇と、
室内の空調を行う空調機と、
前記熱交換型換気扇の制御を行う制御手段と、
前記熱交換型換気扇の熱回収量を演算する熱回収量演算手段と、
前記熱交換型換気扇の熱交換換気電力と普通換気電力の差電力を記憶した第一の記憶手段と、
前記空調機の成績係数を記憶した第二の記憶手段と、
前記空調機を前記差電力の分稼動させた時の暖房出力量を演算する差電力暖房出力量演算手段と、
前記熱回収量と前記差電力暖房出力量を比較判定する比較判定手段と、
前記熱交換換気扇の熱交換換気と普通換気を切り替える切替え手段を備え、
熱回収量と差電力暖房出力量の比較結果に応じて熱交換換気と普通換気を切り替えることを特徴としたものである。
The present invention
A heat exchange type exhaust fan that exchanges heat between indoor exhaust and supply air;
An air conditioner for indoor air conditioning;
Control means for controlling the heat exchange type ventilation fan;
Heat recovery amount calculating means for calculating the heat recovery amount of the heat exchange type ventilation fan;
First storage means for storing a difference power between heat exchange ventilation power and normal ventilation power of the heat exchange type ventilation fan;
Second storage means for storing a coefficient of performance of the air conditioner;
A differential power heating output amount calculating means for calculating a heating output amount when the air conditioner is operated for the differential power; and
Comparison determination means for comparing and determining the heat recovery amount and the differential power heating output amount;
Switching means for switching between heat exchange ventilation and normal ventilation of the heat exchange ventilation fan;
It is characterized by switching between heat exchange ventilation and normal ventilation according to the comparison result of heat recovery amount and differential power heating output amount.
本発明によれば、熱量ロスのない、確実に省エネとなる空調システムを実現できる。 According to the present invention, it is possible to realize an air conditioning system that reliably saves energy without loss of heat.
本発明の請求項１記載の空調システムは、室内の排気と給気の熱交換を行う熱交換型換気扇と、室内の空調を行う空調機と、前記熱交換型換気扇の制御を行う制御手段と、前記熱交換型換気扇の熱回収量を演算する熱回収量演算手段と、前記熱交換型換気扇の熱交換換気電力と普通換気電力の差電力を記憶した第一の記憶手段と、前記空調機の成績係数を記憶した第二の記憶手段と、前記空調機を前記差電力の分稼動させた時の暖房出力量を演算する差電力暖房出力量演算手段と、前記熱回収量と前記差電力暖房出力量を比較判定する比較判定手段と、前記熱交換換気扇の熱交換換気と普通換気を切り替える切替え手段を備え、熱回収量と差電力暖房出力量の比較結果に応じて熱交換換気と普通換気を切り替えることを特徴としたものである。 The air conditioning system according to claim 1 of the present invention is a heat exchange type exhaust fan that performs heat exchange between indoor exhaust and supply air, an air conditioner that performs indoor air conditioning, and a control means that controls the heat exchange type exhaust fan. A heat recovery amount calculating means for calculating a heat recovery amount of the heat exchange type ventilation fan, a first storage means for storing a difference power between the heat exchange ventilation power and the normal ventilation power of the heat exchange type ventilation fan, and the air conditioner Second storage means for storing the coefficient of performance of the above, difference power heating output amount calculation means for calculating the heating output amount when the air conditioner is operated for the difference power, the heat recovery amount and the difference power Comparing and determining means for comparing and determining the heating output amount, and switching means for switching between heat exchange ventilation and normal ventilation of the heat exchange ventilator, heat exchange ventilation and normal power according to the comparison result of heat recovery amount and differential power heating output amount It is characterized by switching ventilation
この構成において、熱回収量が差電力分の空調機稼動による暖房出力量を下回るようであれば、熱交換換気から普通換気に切り替える。これにより、熱量ロスのない、確実に省エネとなる熱交換型換気扇と空調機の併用運転を実現できる。 In this configuration, if the heat recovery amount is less than the heating output amount due to the operation of the air conditioner for the difference power, the heat exchange ventilation is switched to the normal ventilation. Thereby, the combined operation of the heat exchange type ventilation fan and the air conditioner, which is surely energy saving without any loss of heat, can be realized.
本発明の請求項２記載の空調システムは、室内の温湿度を測定する室内温湿度測定手段と、外気の温湿度を測定する外気温湿度測定手段と、給気の温湿度を測定する給気温湿度測定手段と、をさらに備え、前記熱回収量演算手段は、各温湿度の測定結果から熱回収量を演算することを特徴としたものである。この構成により、熱交換型換気扇が全熱交換型である場合の熱回収量を常時演算することができる。 The air conditioning system according to claim 2 of the present invention includes an indoor temperature / humidity measuring means for measuring indoor temperature / humidity, an outside air temperature / humidity measuring means for measuring the temperature / humidity of the outside air, and a supply air temperature for measuring the temperature / humidity of the supply air. And a humidity measuring means , wherein the heat recovery amount calculating means calculates the heat recovery amount from the measurement result of each temperature and humidity. With this configuration, the amount of heat recovered when the heat exchange type ventilation fan is a total heat exchange type can always be calculated.
本発明の請求項３記載の空調システムは、室内の温度を測定する室内温度測定手段と、外気の温度を測定する外気温度測定手段と、給気の温度を測定する給気温度測定手段と、をさらに備え、前記熱回収量演算手段は、各温度の測定結果から熱回収量を演算することを特徴としたものである。この構成により、熱交換型換気扇が顕熱交換型である場合の熱回収量を常時演算することができる。 The air conditioning system according to claim 3 of the present invention includes an indoor temperature measuring means for measuring the indoor temperature, an outdoor temperature measuring means for measuring the temperature of the outside air, a supply air temperature measuring means for measuring the temperature of the supply air, The heat recovery amount calculating means calculates the heat recovery amount from the measurement result of each temperature. With this configuration, the heat recovery amount when the heat exchange type ventilation fan is the sensible heat exchange type can always be calculated.
本発明の請求項４記載の空調システムは、前記熱交換換気扇を普通換気から定期的に熱交換換気に一時的に変更することを特徴としたものである。
普通換気状態では熱交換を行っていないため熱回収量を演算することができない。よって、一時的に熱交換換気に変更し熱回収量を演算する。これにより、普通換気から熱交換換気に変更する判定を行うことができる。
以下、本発明の実施の形態について図面を参照しながら説明する。
（実施の形態１）
図１に示すように、本実施の形態の熱交換型換気扇と空調機の併用運転は、家屋に設置した熱交換型換気扇１と、空調用の空調機２、外気温湿度センサ３、室内温湿度センサ４、給気温湿度センサ５、熱交換換気と普通換気を切替えるダンパ６、そして、熱交換型換気扇１の制御を行う制御手段としてのコントローラ７から構成される。なお、外気温湿度センサ３、室内温湿度センサ４、給気温湿度センサ５は熱交換型換気扇１に内蔵されるものとする。
The air conditioning system according to claim 4 of the present invention is characterized in that the heat exchange ventilation fan is temporarily changed from normal ventilation to heat exchange ventilation periodically.
Heat exchange cannot be calculated because heat is not exchanged in normal ventilation. Therefore, the heat recovery amount is calculated by temporarily changing to heat exchange ventilation. Thereby, the determination which changes from normal ventilation to heat exchange ventilation can be performed.
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
As shown in FIG. 1, the combined operation of the heat exchanging ventilator and the air conditioner of the present embodiment includes a heat exchanging ventilator 1 installed in a house, an air conditioner 2 for air conditioning, an outside temperature humidity sensor 3, an indoor temperature. It comprises a humidity sensor 4, an air temperature / humidity sensor 5, a damper 6 that switches between heat exchange ventilation and normal ventilation, and a controller 7 as control means for controlling the heat exchange type ventilation fan 1. It is assumed that the outside air temperature / humidity sensor 3, the indoor temperature / humidity sensor 4, and the supply air temperature / humidity sensor 5 are built in the heat exchange type ventilation fan 1.
つぎに、図２にコントローラ７の構成、及び各機器やセンサとの電気的な接続の状態を示す。コントローラ７は外気温湿度、給気温湿度、室内温湿度の測定結果と熱交換型換気扇１の消費電力から熱回収量を演算する熱回収量演算部８と、空調機２の外気温度に応じた成績係数を記憶したメモリ９と、熱交換型換気扇１の熱交換換気と普通換気の消費電力の差電力を記憶したメモリ１０と、成績係数と差電力から暖房出力量を計算する暖房出力量演算部１１と、熱回収量と暖房出力量を比較判定し、切替え手段のリレー１２を通じてダンパ６を制御して熱交換換気と普通換気を切替える比較判定部１３から構成されている。 Next, FIG. 2 shows the configuration of the controller 7 and the state of electrical connection with each device and sensor. The controller 7 corresponds to the heat recovery amount calculation unit 8 that calculates the heat recovery amount from the measurement results of the outside air temperature humidity, the supply air temperature humidity, the indoor temperature humidity and the power consumption of the heat exchange type ventilation fan 1, and the outside air temperature of the air conditioner 2 A memory 9 that stores the coefficient of performance, a memory 10 that stores the power difference between the heat exchange ventilation of the heat exchange type ventilation fan 1 and the normal ventilation, and a heating output amount calculation that calculates the heating output amount from the coefficient of performance and the difference power And a comparison / determination unit 13 for comparing and determining the heat recovery amount and the heating output amount, and controlling the damper 6 through the relay 12 of the switching means to switch between heat exchange ventilation and normal ventilation.
以下に、本発明の内容について説明する。 The contents of the present invention will be described below.
図３に、熱交換型換気扇１の熱回収量の推移と空調機２の成績係数および暖房出力量の推移を示す。ここでは、空調機２の消費電力は一定とする。空調機２の成績係数は、外気温度が高くなるにつれて上昇する。空調機２の暖房出力量は成績係数×消費電力であり、消費電力一定なら暖房出力量は成績係数に比例するので、外気温度が高くなるほど暖房出力量は大きくなる。 In FIG. 3, the transition of the heat recovery amount of the heat exchange type ventilation fan 1, the coefficient of performance of the air conditioner 2, and the transition of the heating output amount are shown. Here, the power consumption of the air conditioner 2 is assumed to be constant. The coefficient of performance of the air conditioner 2 increases as the outside air temperature increases. The heating output amount of the air conditioner 2 is performance coefficient × power consumption. Since the heating output amount is proportional to the performance coefficient if the power consumption is constant, the heating output amount increases as the outside air temperature increases.
一方、熱交換型換気扇１の熱交換効率は、同じ外気温度であっても外気湿度、室内温湿度、給気温湿度の状態に応じて増減する。 On the other hand, the heat exchange efficiency of the heat exchange type ventilation fan 1 increases or decreases according to the conditions of the outside air humidity, the room temperature humidity, and the supply air temperature humidity even at the same outside air temperature.
従って、正確な熱回収量を計算するためにはそれぞれの温湿度の数値が必要となる。熱交換換気と普通換気の切替えの判断は、熱交換換気と普通換気で得られる熱量の差を比較し、いずれの換気方法がより多くの熱量を得られるかで判断する必要がある。 Therefore, in order to calculate an accurate heat recovery amount, numerical values of the respective temperatures and humidity are required. The judgment of switching between heat exchange ventilation and normal ventilation needs to be made by comparing the difference in heat quantity obtained between heat exchange ventilation and normal ventilation, and determining which ventilation method can obtain more heat quantity.
熱交換換気で得られる熱量は、熱交換素子による熱回収量＋空調機の暖房出力量であり
、普通換気で得られる熱量は空調機の暖房出力量のみとなる。普通換気では全排熱で熱回収を行わないため、熱交換換気と比べて部屋の暖房負荷が増える。従って、普通換気時は暖房負荷を補うため空調機の稼動を上げる必要がある。
The amount of heat obtained by heat exchange ventilation is the amount of heat recovered by the heat exchange element + the heating output amount of the air conditioner, and the amount of heat obtained by normal ventilation is only the heating output amount of the air conditioner. In normal ventilation, heat recovery is not performed with all exhaust heat, so the heating load of the room increases compared to heat exchange ventilation. Therefore, it is necessary to increase the operation of the air conditioner to compensate for the heating load during normal ventilation.
ところが、熱交換換気と普通換気で熱交換型換気扇の消費電力に差がない場合は、熱回収量がゼロでない限り熱交換換気のほうが普通換気より得られる熱量が大きくなるため、熱交換換気を継続したほうが省エネとなる。 However, if there is no difference in the power consumption of the heat exchange type ventilation fan between heat exchange ventilation and normal ventilation, the heat exchange ventilation produces more heat than normal ventilation unless the heat recovery amount is zero. Continuing will save energy.
しかし、熱交換換気の消費電力が普通換気の消費電力より大きい場合は、その差電力分で空調機を稼動したほうが熱回収量より得られる熱量が大きくなる場合がある。一般的な熱交換型換気扇では、熱交換換気扇で熱交換換気と普通換気の消費電力を比較すると、熱交換素子の圧損分だけ熱交換換気の消費電力が高くなる。 However, when the power consumption of heat exchange ventilation is larger than the power consumption of normal ventilation, the amount of heat obtained may be greater than the amount of heat recovered when the air conditioner is operated with the difference power. In a general heat exchange ventilator, when the power exchange between the heat exchange ventilation and the normal ventilation is compared with the heat exchange ventilator, the power consumption of the heat exchange ventilation is increased by the pressure loss of the heat exchange element.
従って、熱交換換気と普通換気の正確な切替えの判断を行うためには、この消費電力の差の分空調機２を稼動させた際に得られる暖房出力量と熱回収量を演算し比較して、どちらの換気方法がより熱量が得られるかを判定する必要がある。 Therefore, in order to accurately determine switching between heat exchange ventilation and normal ventilation, the heating output amount and heat recovery amount obtained when the air conditioner 2 is operated are calculated and compared for the difference in power consumption. Therefore, it is necessary to determine which ventilation method can obtain more heat.
本発明では熱回収量と暖房出力量を常時演算、比較して熱交換換気と普通換気を行うことにより、確実な省エネを実現する。 In the present invention, the heat recovery amount and the heating output amount are always calculated and compared, and heat exchange ventilation and normal ventilation are performed, thereby realizing reliable energy saving.
次に、具体的な熱交換型換気扇１の熱回収量と、空調機２の暖房出力量を計算する方法について説明する。 Next, a specific method for calculating the heat recovery amount of the heat exchange type ventilation fan 1 and the heating output amount of the air conditioner 2 will be described.
まず、熱交換型換気扇１の熱回収量を計算する。熱回収量は次式で求められる（熱回収量の単位はｋＷとする）。 First, the heat recovery amount of the heat exchange type ventilation fan 1 is calculated. The heat recovery amount is obtained by the following equation (the unit of the heat recovery amount is kW).
熱回収量＝普通換気時外気負荷−熱交換換気時外気負荷 …（１）
熱回収量を計算するには普通換気時外気負荷と熱交換換気時外気負荷を求める必要があるが、普通換気時外気負荷は次式で求められる。
Heat recovery amount = outside air load during normal ventilation-outside air load during heat exchange ventilation (1)
In order to calculate the amount of heat recovery, it is necessary to obtain the outside air load during normal ventilation and the outside air load during heat exchange ventilation.
普通換気時外気負荷＝空気密度（１．２）×外気風量÷３６００
×（室内エンタルピ−外気エンタルピ） …（２）
ここで、外気風量は部屋の換気量を確保するために必要な風量であり、普通換気、熱交換換気いずれも同じ値とする。
エンタルピは温度と湿度がわかれば一意に求めることができるので、室内エンタルピと外気エンタルピは、室内温湿度センサ４と外気温湿度センサ３の測定結果から計算することができる。その計算結果と外気風量を（２）式に代入すると普通換気時外気負荷を求めることができる。
Outside air load during normal ventilation = air density (1.2) x outside air volume / 3600
× (Indoor enthalpy-Open air enthalpy) (2)
Here, the outside air volume is an air volume necessary for securing the ventilation volume of the room, and the normal ventilation and the heat exchange ventilation have the same value.
Since the enthalpy can be obtained uniquely if the temperature and humidity are known, the indoor enthalpy and the outdoor air enthalpy can be calculated from the measurement results of the indoor temperature / humidity sensor 4 and the outdoor air temperature / humidity sensor 3. By substituting the calculation result and the outside air volume into equation (2), the outside air load during normal ventilation can be obtained.
次に、熱交換換気時外気負荷は次式で求められる。 Next, the outdoor air load during heat exchange ventilation is obtained by the following equation.
熱交換換気時外気負荷＝普通換気時外気負荷×（１−熱交換効率） …（３）
熱交換換気時外気負荷を求めるには（３）式の熱交換効率を求める必要があるが、熱交換効率は次式で求められる。
Outside air load during heat exchange ventilation = Outside air load during normal ventilation x (1-heat exchange efficiency) (3)
In order to obtain the outside air load during heat exchange ventilation, it is necessary to obtain the heat exchange efficiency of equation (3), but the heat exchange efficiency is obtained by the following equation.
熱交換効率＝（給気エンタルピ−外気エンタルピ）
／（室内エンタルピ−外気エンタルピ） …（４）
給気エンタルピは、外気エンタルピや室内エンタルピと同様、給気温湿度センサ５の測定結果から求められ、それらの値を（４）式に代入すると熱交換効率が求められる。
計算して求めた熱交換効率を（３）式に代入すると、熱交換換気時外気負荷が得られる。
上記から求められた普通換気時外気負荷と熱交換換気時外気負荷を（１）式に代入すれば、熱回収量を求めることができる。
Heat exchange efficiency = (supply enthalpy-outside enthalpy)
/ (Indoor enthalpy-Open air enthalpy) (4)
The supply air enthalpy is obtained from the measurement result of the supply air temperature / humidity sensor 5 like the outside air enthalpy and the indoor enthalpy, and the heat exchange efficiency is obtained by substituting those values into the equation (4).
By substituting the calculated heat exchange efficiency into equation (3), the outside air load during heat exchange ventilation is obtained.
By substituting the outside air load during normal ventilation and the outside air load during heat exchange ventilation obtained from the above into equation (1), the heat recovery amount can be obtained.
次に、暖房出力量演算部１１で空調機２の差電力分の暖房出力量を演算する。 Next, the heating output amount calculation unit 11 calculates the heating output amount corresponding to the difference power of the air conditioner 2.
メモリ９には外気温度に応じた空調機２の成績係数が記憶されていて、そのときの外気温度における成績係数と、メモリ１０に記憶した差電力を暖房出力量演算部１１で乗算することで空調機２の差電力分の暖房出力量を計算することができる。 The memory 9 stores the coefficient of performance of the air conditioner 2 according to the outside air temperature, and the heating output amount calculating unit 11 multiplies the coefficient of performance at the outside temperature at that time by the difference power stored in the memory 10. The amount of heating output corresponding to the difference power of the air conditioner 2 can be calculated.
熱回収量演算部８で計算した熱回収量と、暖房出力量演算部１１で計算した暖房出力量を比較判定部１３で比較し、熱回収量＞暖房出力量であれば、リレー１２でダンパ６を切替えて熱交換換気を行い、熱回収量＜暖房出力量であれば、同様の操作で普通換気を行う。 The heat recovery amount calculated by the heat recovery amount calculation unit 8 and the heating output amount calculated by the heating output amount calculation unit 11 are compared by the comparison determination unit 13, and if the heat recovery amount> the heating output amount, the relay 12 If the heat recovery amount is less than the heating output amount, normal ventilation is performed by the same operation.
この本発明により、外気温度のみの判断では実現できない熱量ロスのない熱交換型換気扇と空調機の併用運転が可能となる。 According to the present invention, it is possible to perform a combined operation of a heat exchange type exhaust fan and an air conditioner without any heat loss that cannot be realized by judging only the outside air temperature.
また、本発明は、熱交換型換気扇の風量と熱交換換気と普通換気の消費電力差、空調機の外気温度に応じた成績係数が判っていれば、空調機や熱交換型換気扇の能力やサイズを問わず適用することができる。 In addition, if the coefficient of performance according to the air volume of the heat exchange type ventilation fan, the power consumption difference between heat exchange ventilation and normal ventilation, and the outside air temperature of the air conditioner are known, the present invention It can be applied regardless of size.
以上の説明では、熱交換型換気扇が熱交換換気と普通換気の切替機能を有している場合について説明したが、空調機と排気だけの換気扇と熱交換型換気扇を組み合わせたシステムにおいても適用できる。特に、熱交換型換気扇の熱交換換気と普通換気との差電力が小さい場合に本発明の効果が大きく得られる。 In the above description, the case where the heat exchange type ventilation fan has a function of switching between heat exchange ventilation and normal ventilation has been described. However, the present invention can also be applied to a system in which an air conditioner, an exhaust-only ventilation fan, and a heat exchange type ventilation fan are combined. . In particular, the effect of the present invention is greatly obtained when the difference power between heat exchange ventilation and normal ventilation of the heat exchange type ventilation fan is small.
すなわち、熱交換型換気扇が小型のものは、小型化による風路の制約から普通換気時も圧損が高くなり、熱交換換気と普通換気の圧損の差が小さいものがある。
この場合、圧損の差が小さいため差電力が小さくなり成績係数が高くても暖房出力量が小さくなるため、熱回収量が小さくなるまで外気温度が高くならないと普通換気に切替わらない可能性がある。
That is, when the heat exchange type ventilation fan is small, the pressure loss is high even during normal ventilation due to the restriction of the air path due to downsizing, and there is a small difference in pressure loss between heat exchange ventilation and normal ventilation.
In this case, since the difference in pressure loss is small and the power difference is small and the coefficient of performance is high, the amount of heating output is small.Therefore, there is a possibility that switching to normal ventilation is not possible unless the outside air temperature is high until the heat recovery amount is small. is there.
このような場合には、熱交換型換気扇は熱交換換気専用とし普通換気には排気専用の換気扇を用いることで、熱交換換気と普通換気の消費電力差を大きくして差電力を大きく取ることによって、本願発明を適用することができる。 In such a case, use a heat exchange type ventilation fan exclusively for heat exchange ventilation and use a ventilation fan only for exhaust air for normal ventilation, so that the power consumption difference between heat exchange ventilation and normal ventilation is increased to increase the power difference. Thus, the present invention can be applied.
また、これまでの説明では、熱回収量を計算するために温湿度が必要であるため、外気、室内、給気にそれぞれ温湿度センサを用いているが、これは全熱型熱交換型換気扇への適用を想定したものである。 In the above description, since temperature and humidity are required to calculate the amount of heat recovery, temperature and humidity sensors are used for the outside air, the room, and the supply air, respectively. It is assumed to be applied to.
温度のみでも簡易的に熱交換効率および熱回収量を演算することは可能であり、温湿度センサを温度センサに変更することで、本発明は顕熱型熱交換型換気扇への適用も可能である。 It is possible to calculate heat exchange efficiency and heat recovery amount simply by temperature alone, and by changing the temperature / humidity sensor to a temperature sensor, the present invention can be applied to a sensible heat exchange type exhaust fan. is there.
また、本発明では、熱交換型換気扇の熱交換換気時の熱回収量と空調機の暖房出力量を演算し、比較する必要がある。空調機の暖房出力量は所定の値が用いられるが、熱回収量は外気と室内空気の状態によるので、外気、室内空気の温度等を測定することが必要になる。 Moreover, in this invention, it is necessary to calculate and compare the heat recovery amount at the time of heat exchange ventilation of the heat exchange type ventilation fan and the heating output amount of the air conditioner. Although a predetermined value is used as the heating output amount of the air conditioner, the amount of heat recovery depends on the state of the outside air and the room air, so it is necessary to measure the temperature of the outside air and the room air.
そこで、普通換気を行っている場合には、比較判定部１３にて定期的かつ一定時間、普
通換気から強制的に熱交換換気に切替えるようにする。このとき、外気、室内空気の温度（および湿度）の計測を行なう。
Therefore, when normal ventilation is performed, the comparison / determination unit 13 is forced to switch from normal ventilation to heat exchange ventilation periodically and for a fixed time. At this time, the temperature (and humidity) of outside air and room air is measured.
これにより、普通換気時であっても熱回収量を計算できるようになり、熱回収量と暖房出力量を常時比較できるため、普通換気から熱交換換気への切替えを行うことができるようになる。 As a result, the amount of heat recovery can be calculated even during normal ventilation, and the amount of heat recovery can be compared with the amount of heating output at all times, so that switching from normal ventilation to heat exchange ventilation can be performed. .
本発明は、熱交換型換気扇と空調機を併用運転する空調システムに適用できる。 The present invention can be applied to an air conditioning system in which a heat exchange type ventilation fan and an air conditioner are operated in combination.
１ 熱交換型換気扇
２ 空調機
３ 外気温湿度センサ
４ 室内温湿度センサ
５ 給気温湿度センサ
６ ダンパ
７ コントローラ
８ 熱回収量演算部
９ メモリ
１０ メモリ
１１ 暖房出力量演算部
１２ リレー
１３ 比較判定部
DESCRIPTION OF SYMBOLS 1 Heat exchange type exhaust fan 2 Air conditioner 3 Outside temperature humidity sensor 4 Indoor temperature humidity sensor 5 Air supply temperature humidity sensor 6 Damper 7 Controller 8 Heat recovery amount calculation part 9 Memory 10 Memory 11 Heating output amount calculation part 12 Relay 13 Comparison determination part
Claims (4)
室内の空調を行う空調機と、
前記熱交換型換気扇の制御を行う制御手段と、
前記熱交換型換気扇の熱回収量を演算する熱回収量演算手段と、
前記熱交換型換気扇の熱交換換気電力と普通換気電力の差電力を記憶した第一の記憶手段と、
前記空調機の成績係数を記憶した第二の記憶手段と、
前記空調機を前記差電力の分稼動させた時の暖房出力量を演算する差電力暖房出力量演算手段と
前記熱回収量と前記差電力暖房出力量を比較判定する比較判定手段と、
前記熱交換型換気扇の熱交換換気と普通換気を切り替える切替え手段を備え、
熱回収量と差電力暖房出力量の比較結果に応じて熱交換換気と普通換気を切り替えることを特徴とする空調システム。 A heat exchange type exhaust fan that exchanges heat between indoor exhaust and supply air;
An air conditioner for indoor air conditioning;
Control means for controlling the heat exchange type ventilation fan;
Heat recovery amount calculating means for calculating the heat recovery amount of the heat exchange type ventilation fan;
First storage means for storing a difference power between heat exchange ventilation power and normal ventilation power of the heat exchange type ventilation fan;
Second storage means for storing a coefficient of performance of the air conditioner;
A differential power heating output amount calculating means for calculating a heating output amount when the air conditioner is operated for the differential power, and a comparison determining means for comparing and comparing the heat recovery amount and the differential power heating output amount;
Switching means for switching between heat exchange ventilation and normal ventilation of the heat exchange type ventilation fan;
An air conditioning system characterized by switching between heat exchange ventilation and normal ventilation according to the comparison result of heat recovery amount and differential power heating output amount.
外気の温湿度を測定する外気温湿度測定手段と、
給気の温湿度を測定する給気温湿度測定手段と、をさらに備え、
前記熱回収量演算手段は、
各温湿度の測定結果から熱回収量を演算することを特徴とする請求項１記載の空調システム。 Indoor temperature and humidity measuring means for measuring the indoor temperature and humidity;
An outside temperature and humidity measuring means for measuring the temperature and humidity of the outside air;
A temperature and humidity measuring means for measuring the temperature and humidity of the supply air , and
The heat recovery amount calculation means includes:
2. The air conditioning system according to claim 1, wherein a heat recovery amount is calculated from a measurement result of each temperature and humidity.
外気の温度を測定する外気温度測定手段と、
給気の温度を測定する給気温度測定手段と、をさらに備え、
前記熱回収量演算手段は、各温度の測定結果から熱回収量を演算することを特徴とする請求項１記載の空調システム。 Indoor temperature measuring means for measuring indoor temperature;
Outside temperature measuring means for measuring the temperature of outside air;
An air supply temperature measuring means for measuring the temperature of the air supply ;
The air conditioning system according to claim 1, wherein the heat recovery amount calculation means calculates a heat recovery amount from a measurement result of each temperature.
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