JPH1030840A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPH1030840A JPH1030840A JP8187341A JP18734196A JPH1030840A JP H1030840 A JPH1030840 A JP H1030840A JP 8187341 A JP8187341 A JP 8187341A JP 18734196 A JP18734196 A JP 18734196A JP H1030840 A JPH1030840 A JP H1030840A
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- room temperature
- indoor temperature
- temperature
- operating frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、圧縮機の容量制
御と送風ファンの風量制御を行う空気調和機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for controlling a capacity of a compressor and a flow rate of a blower fan.
【０００２】[0002]
【従来の技術】従来、空気調和機としては、室内温度に
基づいて圧縮機の運転周波数ｆを制御して、室内温度が
設定室内温度になるように能力を制御すると共に、吹出
温度が設定吹出温度になるように送風ファンの風量を制
御するものがある。この空気調和機は、吹出温度を制御
しつつ、図３に示すように、圧縮機の運転周波数ｆを最
高運転周波数ｆmaxから最低運転周波数ｆminまで段階的
に変化させて、冷房能力を１００％から２５％まで制御
する。2. Description of the Related Art Conventionally, as an air conditioner, the operation frequency f of a compressor is controlled based on the indoor temperature to control the capacity so that the indoor temperature becomes a set indoor temperature, and the blowout temperature is set to a set blowout temperature. There is one that controls the air volume of a blower fan so as to reach a temperature. The air conditioner, while controlling the air temperature, as shown in FIG. 3, the minimum operating stepwise changed to a frequency f min of the operation frequency f of the compressor from the maximum operating frequency f max, the cooling capacity 100 Control from% to 25%.
【０００３】[0003]
【発明が解決しようとする課題】ところで、上記空気調
和機の冷房運転において、低負荷時に圧縮機を最低運転
周波数ｆminで運転しても、室内温度が設定室内温度よ
りも低いときは、圧縮機の運転周波数を最低運転周波数
ｆmin以下に下げられないので、圧縮機を停止する。そ
して、上記室内温度が設定室内温度よりも高くなると、
再び圧縮機を起動する。このように、特に低負荷時は圧
縮機の運転と停止が繰り返されるので、室内温度制御の
精度が低下すると共に、圧縮機の寿命が低下するという
問題がある。In the cooling operation of the air conditioner, even if the compressor is operated at the lowest operating frequency f min at a low load, if the room temperature is lower than the set room temperature, the compression is not performed. The compressor is stopped because the operating frequency of the compressor cannot be reduced below the minimum operating frequency fmin . When the room temperature becomes higher than the set room temperature,
Start the compressor again. As described above, particularly when the load is low, the operation and stop of the compressor are repeated, so that there is a problem that the accuracy of the indoor temperature control is reduced and the life of the compressor is reduced.
【０００４】そこで、この発明の目的は、室内温度制御
の精度を向上でき、圧縮機の寿命を長くできる空気調和
機を提供することにある。An object of the present invention is to provide an air conditioner capable of improving the accuracy of indoor temperature control and extending the life of a compressor.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、請求項１の空気調和機は、圧縮機,室外熱交換器,膨
張手段および室内熱交換器が環状に接続された冷媒回路
を備えて、上記圧縮機の運転周波数を制御することによ
って容量制御する空気調和機において、上記圧縮機を最
低運転周波数で運転中、室内温度が設定室内温度よりも
低いとき、上記室内熱交換器用の送風ファンの風量を下
げるようにしたことを特徴としている。In order to achieve the above object, the air conditioner of the present invention comprises a refrigerant circuit in which a compressor, an outdoor heat exchanger, an expansion means and an indoor heat exchanger are connected in a ring. In the air conditioner that controls the capacity by controlling the operating frequency of the compressor, when the compressor is operating at the lowest operating frequency, and when the indoor temperature is lower than the set indoor temperature, the air for the indoor heat exchanger is blown. The feature is to reduce the air volume of the fan.
【０００６】上記請求項１の空気調和機によれば、上記
圧縮機の運転周波数を高くしたり低くしたりして、圧縮
機の容量を制御することによって、冷房能力を大小に制
御する。そして、低負荷時に上記圧縮機を最低運転周波
数にして、冷房能力を下げても、室内温度が設定室内温
度よりも低いとき、送風ファンの風量を下げて、冷房能
力をさらに小さくする。したがって、上記圧縮機の運転
周波数が最低周波数であっても、できるだけ圧縮機を停
止しないようにして、圧縮機の発停回数を少なくするの
で、室内温度制御の精度を向上できると共に、圧縮機の
寿命を延ばすことができる。According to the air conditioner of the first aspect, by controlling the capacity of the compressor by raising or lowering the operating frequency of the compressor, the cooling capacity is controlled to be large or small. Then, even when the compressor is set to the lowest operating frequency at a low load and the cooling capacity is reduced, when the room temperature is lower than the set room temperature, the airflow of the blower fan is reduced to further reduce the cooling capacity. Therefore, even if the operating frequency of the compressor is the lowest frequency, the compressor is not stopped as much as possible to reduce the number of times of starting and stopping the compressor. Life can be extended.
【０００７】また、請求項２の空気調和機は、圧縮機,
室外熱交換器,膨張手段および室内熱交換器が環状に接
続された冷媒回路と、上記圧縮機の運転周波数を制御す
ることによって容量制御する圧縮機容量制御手段と、上
記室内熱交換器用の送風ファンの風量を制御する送風フ
ァン風量制御手段とを備えた空気調和機において、室内
温度を検出する室内温度センサと、上記室内温度センサ
により検出された室内温度が設定室内温度よりも低いか
否かを判別する室内温度判別手段と、上記圧縮機を最低
運転周波数で運転中、上記室内温度判別手段が上記室内
温度が上記設定室内温度よりも低いと判別すると、上記
送風ファンの風量を下げるように上記送風ファン風量制
御手段に指令する風量低下指令手段とを備えたことを特
徴としている。[0007] The air conditioner according to claim 2 is a compressor,
A refrigerant circuit in which the outdoor heat exchanger, the expansion means and the indoor heat exchanger are connected in a ring, a compressor capacity control means for controlling the capacity by controlling the operating frequency of the compressor, and a blower for the indoor heat exchanger In an air conditioner including a blower fan air volume control unit that controls an air volume of a fan, an indoor temperature sensor that detects an indoor temperature, and whether an indoor temperature detected by the indoor temperature sensor is lower than a set indoor temperature or not. When the indoor temperature determining means determines that the indoor temperature is lower than the set indoor temperature while the compressor is operating at the lowest operating frequency, the air flow of the blower fan is reduced. Air flow reduction command means for instructing the blower fan air flow control means.
【０００８】上記請求項２の空気調和機によれば、上記
圧縮機の運転周波数を高くしたり低くしたりして、圧縮
機の容量を制御することによって、冷房能力を大小に制
御する。そして、低負荷時に上記圧縮機を最低運転周波
数にして、冷房能力を下げても、上記室内温度判別手段
が室内温度が設定室内温度よりも低いと判別すると、上
記風量低下指令手段により送風ファン風量制御手段に送
風ファンの風量を下げるように指令し、送風ファン風量
制御手段は、送風ファンの風量を現在の風量から例えば
一定量下げて、冷房能力をさらに小さくする。したがっ
て、上記圧縮機の運転周波数が最低運転周波数であって
も、できるだけ圧縮機を停止しないようにして、圧縮機
の発停回数を少なくするので、室内温度制御の精度を向
上できると共に、圧縮機の寿命を延ばすことができる。According to the air conditioner of the second aspect, the cooling frequency is controlled by increasing or decreasing the operating frequency of the compressor to control the capacity of the compressor. Then, even when the compressor is set to the lowest operating frequency at a low load and the cooling capacity is reduced, if the indoor temperature determining means determines that the indoor temperature is lower than the set indoor temperature, the air flow reduction command means sets the blower fan air volume. The control means is instructed to reduce the air flow rate of the blower fan, and the blower air flow rate control means lowers the air flow rate of the blower fan, for example, by a certain amount from the current air flow rate, to further reduce the cooling capacity. Therefore, even if the operating frequency of the compressor is the lowest operating frequency, the compressor is not stopped as much as possible to reduce the number of times the compressor is started and stopped, so that the accuracy of the indoor temperature control can be improved and the compressor can be improved. Life can be extended.
【０００９】また、請求項３の空気調和機は、請求項１
または２の空気調和機において、上記室内温度に基づい
て上記圧縮機の運転周波数を制御すると共に、吹出温度
に基づいて上記送風ファンの風量を制御することを特徴
としている。[0009] The air conditioner according to the third aspect is characterized by the first aspect.
In the air conditioner of the second aspect, the operating frequency of the compressor is controlled based on the room temperature, and the air flow rate of the blower fan is controlled based on the blowout temperature.
【００１０】上記請求項３の空気調和機によれば、例え
ば、上記圧縮機の運転周波数を制御し、圧縮機の容量を
制御して、上記室内温度が上記設定室内温度になるよう
に冷房能力を制御する室内温度制御と、上記吹出温度が
設定吹出温度になるように送風ファンの風量を制御する
吹出温度制御とを行う場合、上記圧縮機の運転周波数が
最低運転周波数より高いときは、室内温度制御と吹出温
度制御とをそれぞれ別々にかつ同時に行う。一方、上記
圧縮機の運転周波数が最低運転周波数の場合は、室内温
度が設定室内温度よりも低いとき、吹出温度制御を止め
て、送風ファンの風量を下げ、冷房能力を下げる。した
がって、上記室内温度制御と吹出温度制御を行う空気調
和機では、圧縮機の運転周波数が最低運転周波数よりも
高いときは、室内温度制御と吹出温度制御をそのまま行
うので、室内温度制御の精度を低下させない。According to the air conditioner of the third aspect, for example, the operating frequency of the compressor is controlled, the capacity of the compressor is controlled, and the cooling capacity is adjusted so that the room temperature becomes the set room temperature. If the operating frequency of the compressor is higher than the minimum operating frequency, the indoor temperature control for controlling the air temperature and the blowing temperature control for controlling the air volume of the blower fan so that the blowing temperature becomes the set blowing temperature are performed. The temperature control and the blowout temperature control are performed separately and simultaneously. On the other hand, when the operating frequency of the compressor is the lowest operating frequency, when the room temperature is lower than the set room temperature, the blowout temperature control is stopped, the air volume of the blower fan is reduced, and the cooling capacity is reduced. Therefore, in the air conditioner that performs the indoor temperature control and the outlet temperature control, when the operating frequency of the compressor is higher than the minimum operating frequency, the indoor temperature control and the outlet temperature control are performed as they are, so that the accuracy of the indoor temperature control is improved. Do not lower.
【００１１】[0011]
【発明の実施の形態】以下、この発明の空気調和機を図
示の実施の形態により詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an air conditioner according to the present invention will be described in detail with reference to the illustrated embodiments.
【００１２】図１はこの発明の実施の一形態の空気調和
機の回路図であり、１は圧縮機、２は上記圧縮機１の吐
出側に一端が接続された室外熱交換器、３は上記室外熱
交換器２の他端に一端が接続された膨張手段としての電
動弁、４は上記電動弁３の他端に一端が接続され、他端
が上記圧縮機１の吸込側に接続された室内熱交換器、５
は上記室内熱交換器４用の送風ファンである。上記圧縮
機１,室外熱交換器２,電動弁３および室内熱交換器４で
冷媒回路を構成している。また、上記空気調和機は、送
風ファン５の吸込側に設けられ、吸込温度すなわち室内
温度を検出する室内温度センサ６と、上記室内熱交換器
４の吹出口側に設けられ、吹出温度を検出する吹出温度
センサ７と、上記室内温度センサ６からの室内温度を表
す信号と吹出温度センサ７からの吹出温度を表す信号と
を受けて、圧縮機１,電動弁３および送風ファン５等を
制御する制御装置１０とを備えている。FIG. 1 is a circuit diagram of an air conditioner according to an embodiment of the present invention, wherein 1 is a compressor, 2 is an outdoor heat exchanger having one end connected to the discharge side of the compressor 1, and 3 is An electric valve 4 as an expansion means having one end connected to the other end of the outdoor heat exchanger 2 has one end connected to the other end of the electric valve 3 and the other end connected to the suction side of the compressor 1. Indoor heat exchanger, 5
Is a blower fan for the indoor heat exchanger 4. The compressor 1, the outdoor heat exchanger 2, the electric valve 3, and the indoor heat exchanger 4 constitute a refrigerant circuit. The air conditioner is provided on the suction side of the blower fan 5 and detects the suction temperature, that is, the indoor temperature. The indoor temperature sensor 6 is provided on the outlet side of the indoor heat exchanger 4 and detects the outlet temperature. Receiving a signal indicating the indoor temperature from the indoor temperature sensor 6 and a signal indicating the blowing temperature from the output temperature sensor 7 to control the compressor 1, the motor-operated valve 3, the blower fan 5 and the like. And a control device 10 that performs the control.
【００１３】また、上記制御装置１０は、マイクロコン
ピュータと入出力回路等からなり、圧縮機１の運転周波
数を制御する制御信号を出力して、室内温度が設定室内
温度になるように容量制御する圧縮機容量制御手段とし
ての圧縮機容量制御部１０aと、上記送風ファン５の風
量を制御する送風ファン風量制御手段としての送風ファ
ン風量制御部１０bと、上記室内温度が設定室内温度よ
りも低いか否かを判別する室内温度判別手段としての室
内温度判別部１０cと、上記圧縮機容量制御部１０aの制
御信号と室内温度判別部１０cの判別結果を表す信号と
に基づいて、現在の風量よりも一定量下げるように指令
する指令信号を送風ファン風量制御部１０bに出力する
風量低下指令手段としての風量低下指令部１０dとを有
している。The control device 10 includes a microcomputer, an input / output circuit, and the like, outputs a control signal for controlling the operating frequency of the compressor 1, and performs capacity control so that the room temperature becomes the set room temperature. A compressor capacity control unit 10a as a compressor capacity control unit, a blowing fan air volume control unit 10b as a blowing fan air volume control unit for controlling the air volume of the blowing fan 5, and whether the indoor temperature is lower than a set indoor temperature. Based on a room temperature determining unit 10c as room temperature determining means for determining whether or not the current air volume is higher than a current value based on a control signal of the compressor capacity controller 10a and a signal representing a result of determination by the room temperature determining unit 10c. An air flow reduction command section 10d as air flow reduction command means for outputting a command signal for instructing the blower fan air flow control section 10b to reduce the flow rate by a certain amount is provided.
【００１４】上記構成の空気調和機において、圧縮機１
から吐出された高温高圧冷媒は、凝縮器としての室外熱
交換器２で室外に熱を放出して凝縮し、その後、電動弁
３により減圧されて低温低圧冷媒となる。そして、上記
室内熱交換器４で低温低圧冷媒が室内から熱を吸収して
蒸発することによって、室内を冷房する。このとき、上
記制御装置１０の圧縮機容量制御部１０aは、室内温度
センサ６により検出された室内温度に基づいて圧縮機１
の運転周波数ｆを制御することによって容量制御して、
室内温度が設定室内温度になるように冷房能力を制御す
る。すなわち、上記室内温度が設定室内温度よりも高い
場合に、その室内温度と設定室内温度との温度差の大小
に応じて冷房能力を大小に制御するのである。また、上
記制御装置１０の室内ファン風量制御部１０bは、吹出
温度センサ７により検出された吹出温度が設定吹出温度
になるように送風ファン５の風量を制御する。In the air conditioner having the above structure, the compressor 1
The high-temperature and high-pressure refrigerant discharged from is discharged and condensed by the outdoor heat exchanger 2 serving as a condenser, and then decompressed by the electric valve 3 to become a low-temperature and low-pressure refrigerant. Then, the low-temperature and low-pressure refrigerant absorbs heat from the room and evaporates in the indoor heat exchanger 4, thereby cooling the room. At this time, the compressor capacity control unit 10a of the control device 10 controls the compressor 1 based on the indoor temperature detected by the indoor temperature sensor 6.
The capacity is controlled by controlling the operating frequency f of
The cooling capacity is controlled so that the room temperature becomes the set room temperature. That is, when the room temperature is higher than the set room temperature, the cooling capacity is controlled to be large or small according to the size of the temperature difference between the room temperature and the set room temperature. Further, the indoor fan air volume control unit 10b of the control device 10 controls the air volume of the blower fan 5 so that the blow temperature detected by the blow temperature sensor 7 becomes the set blow temperature.
【００１５】図２は上記制御装置１０の動作を示すフロ
ーチャートである。FIG. 2 is a flowchart showing the operation of the control device 10.
【００１６】以下、図２のフローチャートに従って制御
装置１０の低負荷時の処理を説明する。Hereinafter, the processing of the control device 10 when the load is low will be described with reference to the flowchart of FIG.
【００１７】まず、ステップＳ１で室内温度センサ６に
より室内温度を検出する。次に、ステップＳ２で室内温
度判別部１０cにより室内温度が設定室内温度よりも低
いか否かを判別する。そして、ステップＳ２で室内温度
が設定室内温度未満であると判別すると、ステップＳ３
に進む一方、室内温度が設定室内温度以上であると判別
すると、ステップＳ１に戻る。First, in step S1, the room temperature is detected by the room temperature sensor 6. Next, in step S2, the room temperature determining unit 10c determines whether the room temperature is lower than the set room temperature. If it is determined in step S2 that the room temperature is lower than the set room temperature, step S3
On the other hand, if it is determined that the room temperature is equal to or higher than the set room temperature, the process returns to step S1.
【００１８】次に、ステップＳ３に進み、圧縮機１の運
転周波数ｆが最低周波数ｆminであるか否かを判別し
て、運転周波数ｆが最低周波数ｆminであると判別する
と、ステップＳ４に進む。一方、ステップＳ３で運転周
波数ｆが最低周波数ｆminでないと判別すると、ステッ
プＳ６に進み、運転周波数ｆを下げて、ステップＳ１に
戻る。すなわち、上記圧縮機容量制御部１０aは、現在
の運転周波数ｆを一定周波数下げて、冷房能力を低下さ
せるのである。[0018] Then, in step S3, the operation frequency f of the compressor 1 is determined whether the minimum frequency f min, when determining that the operation frequency f is the lowest frequency f min, to step S4 move on. On the other hand, the operation when the frequency f is not determined minimum frequency f min in step S3, the process proceeds to step S6, by lowering the operation frequency f, the flow returns to step S1. That is, the compressor capacity control unit 10a lowers the current operating frequency f by a certain frequency to lower the cooling capacity.
【００１９】次に、ステップＳ４に進み、送風ファン風
量ｗが最低風量ｗminであるか否かを判別して、送風フ
ァン風量ｗが最低風量ｗminであると判別すると、ステ
ップＳ５に進み、圧縮機１を停止して、この処理を終了
する。一方、ステップＳ４で送風ファン風量ｗが最低風
量ｗminでないと判別すると、ステップＳ７に進み、送
風ファン風量を下げて、ステップＳ１に戻る。すなわ
ち、上記風量低下指令部１０dから送風ファン風量制御
部１０bに指令信号を出力して、その指令信号を送風フ
ァン風量制御部１０bが受けると、送風ファン風量制御
部１０bは、送風ファン５の風量を現在の風量よりも一
定量下げる。例えば、上記送風ファン５の風量が３段切
換(最高風量Ｈ、中間風量Ｍ、最低風量Ｌ(＝ｗmin))の
場合、現在の風量が最高風量Ｈのときは１段下げて、中
間風量Ｍとし、現在の風量が中間風量Ｍのときは１段下
げて、最低風量Ｌとするのである。[0019] Next, in Step S4, the blower fan air volume w is determined whether the minimum air volume w min, determines the blower fan air volume w is the lowest air volume w min, the process proceeds to step S5, The compressor 1 is stopped, and the process ends. On the other hand, when the blower fan air volume w is not determined minimum air volume w min in step S4, the process proceeds to step S7, to lower the blower fan air volume, the flow returns to step S1. That is, a command signal is output from the air volume reduction command unit 10d to the blowing fan air volume control unit 10b, and when the command signal is received by the blowing fan air volume control unit 10b, the air volume of the blowing fan 5 is changed. Is reduced by a certain amount from the current air volume. For example, when the air volume of the blower fan 5 is switched in three stages (the maximum air volume H, the intermediate air volume M, and the minimum air volume L (= w min )), the current air volume is lowered by one stage when the current air volume is the maximum air volume H, and the intermediate air volume is reduced. M, and when the current air volume is the intermediate air volume M, the air volume is lowered by one stage to the minimum air volume L.
【００２０】このように、上記圧縮機１の運転周波数ｆ
を制御して、圧縮機１の容量を制御することによって、
冷房能力を大小に制御する。そして、低負荷時に上記圧
縮機１を最低運転周波数ｆminにして、冷房能力を下げ
ても、室内温度判別部１０cが室内温度が設定室内温度
未満と判別する場合、風量低下指令部１０dからの指令
により室内ファン風量制御部１０bは送風ファン５の風
量を下げて、冷房能力をさらに小さくする。したがっ
て、上記圧縮機１をできるだけ停止しないようにして、
圧縮機１の発停回数を少なくするので、室内温度制御の
精度を向上できると共に、圧縮機１の寿命を延ばすこと
ができる。Thus, the operating frequency f of the compressor 1 is
By controlling the capacity of the compressor 1
Control the cooling capacity to large or small. When the indoor temperature determining unit 10c determines that the indoor temperature is lower than the set indoor temperature even when the compressor 1 is set to the minimum operating frequency f min at a low load and the cooling capacity is reduced, the air flow rate reduction command unit 10d receives the instruction. In response to the command, the indoor fan air volume control unit 10b lowers the air volume of the blower fan 5 to further reduce the cooling capacity. Therefore, the compressor 1 should not be stopped as much as possible,
Since the number of times of starting and stopping the compressor 1 is reduced, the accuracy of the indoor temperature control can be improved, and the life of the compressor 1 can be extended.
【００２１】また、上記圧縮機１の運転周波数ｆが最低
運転周波数ｆminよりも高い場合は、室内温度に基づい
て圧縮機１の運転周波数ｆを制御して、室内温度が設定
室内温度になるように冷房能力を制御する室内温度制御
を行うと共に、上記吹出温度に基づいて送風ファン５の
風量を制御して、吹出温度が設定吹出温度になるように
吹出温度を制御する吹出温度制御をできるだけ継続す
る。そして、上記圧縮機１の運転周波数ｆが最低運転周
波数ｆminの場合は、室内温度が設定室内温度よりも低
いとき、室内ファン風量制御部１０bによる吹出温度制
御を止めて、送風ファン５の風量を下げ、冷房能力をさ
らに下げる。したがって、上記室内温度に基づいて圧縮
機１の運転周波数ｆを制御する室内温度制御と、吹出温
度に基づいて送風ファン５の風量を制御する吹出温度制
御とを行う空気調和機では、圧縮機１の運転周波数ｆが
最低運転周波数ｆminより高いときは、室内温度制御と
吹出温度制御をそのまま行うので、室内温度制御の精度
が低下しない。When the operating frequency f of the compressor 1 is higher than the minimum operating frequency f min, the operating frequency f of the compressor 1 is controlled based on the indoor temperature so that the indoor temperature becomes the set indoor temperature. As described above, the indoor temperature control for controlling the cooling capacity is performed, and the flow rate of the blower fan 5 is controlled based on the blowout temperature to control the blowout temperature so that the blowout temperature becomes the set blowout temperature. continue. When the operating frequency f of the compressor 1 is the minimum operating frequency f min , when the indoor temperature is lower than the set indoor temperature, the blowing temperature control by the indoor fan air volume control unit 10b is stopped, and the air volume of the blower fan 5 is reduced. Lower the cooling capacity. Therefore, in the air conditioner that performs the indoor temperature control that controls the operating frequency f of the compressor 1 based on the indoor temperature and the blowout temperature control that controls the air volume of the blower fan 5 based on the blowout temperature, the compressor 1 When the operating frequency f is higher than the minimum operating frequency fmin , the indoor temperature control and the blow-out temperature control are performed as they are, so that the accuracy of the indoor temperature control does not decrease.
【００２２】上記実施の形態では、冷房運転を行う空気
調和機について説明したが、四路弁等を用いて冷媒回路
の冷凍サイクルを切り換えて、冷暖房運転を行う空気調
和機にこの発明を適用してもよい。また、送風ファン
は、インバータによって３段階以上の多段階に回転数が
変えられるものであってもよい。In the above embodiment, the air conditioner performing the cooling operation has been described. However, the present invention is applied to the air conditioner performing the cooling / heating operation by switching the refrigeration cycle of the refrigerant circuit using a four-way valve or the like. You may. Further, the fan may be such that the number of rotations can be changed in three or more stages by an inverter.
【００２３】また、上記実施の形態では、上記室内温度
に基づいて圧縮機１の運転周波数を制御すると共に、上
記吹出温度に基づいて送風ファン５の風量を制御する空
気調和機について説明したが、室内温度に基づく圧縮機
の容量制御や、吹出温度に基づく送風ファンの風量制御
を行わない空気調和機にこの発明を適用してもよい。In the above-described embodiment, the air conditioner that controls the operating frequency of the compressor 1 based on the indoor temperature and controls the air volume of the blower fan 5 based on the blow-out temperature has been described. The present invention may be applied to an air conditioner that does not control the capacity of the compressor based on the indoor temperature or the air volume control of the blower fan based on the blowing temperature.
【００２４】[0024]
【発明の効果】以上より明らかなように、請求項１の発
明の空気調和機は、圧縮機,室外熱交換器,膨張手段およ
び室内熱交換器が環状に接続された冷媒回路を備えて、
圧縮機の運転周波数を制御することによって容量制御す
る空気調和機において、圧縮機を最低運転周波数で運転
中、室内温度が設定室内温度よりも低いとき、室内熱交
換器用の送風ファンの風量を下げるようにしたものであ
る。As is clear from the above, the air conditioner according to the first aspect of the present invention includes a refrigerant circuit in which a compressor, an outdoor heat exchanger, expansion means, and an indoor heat exchanger are connected in a ring.
In an air conditioner whose capacity is controlled by controlling the operating frequency of the compressor, when the indoor temperature is lower than the set indoor temperature while the compressor is operating at the lowest operating frequency, the airflow of the blower fan for the indoor heat exchanger is reduced. It is like that.
【００２５】したがって、請求項１の発明の空気調和機
によれば、低負荷時に上記圧縮機を最低運転周波数にし
て、冷房能力を下げても、室内温度が設定室内温度より
も低いとき、送風ファンの風量を下げて、冷房能力をさ
らに小さくするので、圧縮機ができるだけ停止しないよ
うにして、圧縮機の発停回数を少なくでき、室内温度制
御の精度を向上できると共に、圧縮機の寿命を延ばすこ
とができる。Therefore, according to the air conditioner of the first aspect of the present invention, when the indoor temperature is lower than the set indoor temperature even when the compressor is set to the minimum operating frequency at a low load and the cooling capacity is reduced, Since the cooling capacity is further reduced by lowering the air flow of the fan, the compressor is not stopped as much as possible, the number of times of starting and stopping the compressor can be reduced, the accuracy of indoor temperature control can be improved, and the life of the compressor can be extended. Can be extended.
【００２６】また、請求項２の発明の空気調和機は、圧
縮機,室外熱交換器,膨張手段および室内熱交換器が環状
に接続された冷媒回路と、上記圧縮機の運転周波数を制
御することによって容量制御する圧縮機容量制御手段
と、上記室内熱交換器用の送風ファンの風量を制御する
送風ファン風量制御手段とを備えた空気調和機におい
て、圧縮機を最低運転周波数で運転中、室内温度判別手
段が室内温度が設定室内温度よりも低いと判別すると、
風量低下指令手段が送風ファンの風量を下げるように送
風ファン風量制御手段に指令するものである。According to a second aspect of the present invention, there is provided an air conditioner for controlling a refrigerant circuit in which a compressor, an outdoor heat exchanger, an expansion means and an indoor heat exchanger are connected in a ring, and an operating frequency of the compressor. An air conditioner including a compressor capacity control means for controlling the capacity by controlling the air flow rate of the blower fan for the indoor heat exchanger and an air flow rate control means for controlling the air flow rate of the blower fan for the indoor heat exchanger. When the temperature determining means determines that the room temperature is lower than the set room temperature,
The air flow reduction command means instructs the blower air flow control means to lower the air flow of the blower fan.
【００２７】したがって、請求項２の発明の空気調和機
によれば、低負荷時に上記圧縮機を最低運転周波数にし
て、冷房能力を下げても、上記室内温度判別手段が室内
温度が設定室内温度よりも低いと判別すると、上記風量
低下指令手段により送風ファン風量制御手段に送風ファ
ンの風量を下げるように指令し、送風ファン風量制御手
段は、送風ファンの風量を現在の風量から例えば一定量
下げて、冷房能力をさらに小さくする。したがって、上
記圧縮機ができるだけ停止しないようにして、圧縮機の
発停回数を少なくでき、室内温度の制御の精度を向上で
きると共に、圧縮機の寿命を延ばすことができる。Therefore, according to the air conditioner of the second aspect of the present invention, even when the compressor is set to the minimum operating frequency at a low load and the cooling capacity is reduced, the indoor temperature determining means can set the indoor temperature to the set indoor temperature. When it is determined that the air flow rate is lower than the air flow rate, the air flow rate reduction command means instructs the blower fan air flow rate control means to lower the air flow rate of the blower fan, and the blower air flow rate control means lowers the air flow rate of the blower fan from the current air flow by, for example, a certain amount. To further reduce the cooling capacity. Therefore, the compressor is prevented from stopping as much as possible, so that the number of start and stop of the compressor can be reduced, the accuracy of controlling the indoor temperature can be improved, and the life of the compressor can be extended.
【００２８】また、請求項３の発明の空気調和機は、請
求項１または２の空気調和機において、上記室内温度に
基づいて上記圧縮機の運転周波数を制御すると共に、吹
出温度に基づいて上記送風ファンの風量を制御するもの
である。According to a third aspect of the present invention, in the air conditioner of the first or second aspect, the operating frequency of the compressor is controlled based on the room temperature, and the air conditioner is controlled based on the blow-out temperature. It controls the air volume of the blower fan.
【００２９】したがって、請求項３の発明の空気調和機
によれば、上記室内温度に基づく圧縮機の運転周波数の
制御と並行して、上記吹出温度に基づいて、例えば吹出
温度が設定吹出温度になるように上記送風ファンの風量
を制御する。そして、上記圧縮機の運転周波数が最低運
転周波数より高い場合は、圧縮機の容量制御と吹出温度
制御とを別々に同時に行い、快適性を向上する。一方、
上記圧縮機の運転周波数が最低運転周波数の場合は、室
内温度が設定室内温度よりも低いとき、吹出温度制御を
止めて、送風ファンの風量を下げ、冷房能力を下げる。
したがって、請求項３の発明の空気調和機は、快適性を
向上できると共に、圧縮機の発停を少なくできるTherefore, according to the air conditioner of the third aspect of the present invention, in parallel with the control of the operating frequency of the compressor based on the room temperature, for example, the blow temperature is set to the set blow temperature based on the blow temperature. The air volume of the blower fan is controlled so as to be as follows. When the operating frequency of the compressor is higher than the minimum operating frequency, the capacity control and the blow-out temperature control of the compressor are separately and simultaneously performed to improve comfort. on the other hand,
When the operating frequency of the compressor is the lowest operating frequency, when the room temperature is lower than the set room temperature, the blow-out temperature control is stopped, the air volume of the blower fan is reduced, and the cooling capacity is reduced.
Therefore, the air conditioner according to the third aspect of the present invention can improve comfort and reduce starting and stopping of the compressor.
【図１】 図１はこの発明の実施の一形態の空気調和機
の回路図である。FIG. 1 is a circuit diagram of an air conditioner according to an embodiment of the present invention.
【図２】 図２は上記空気調和機の制御装置の動作を示
すフローチャートである。FIG. 2 is a flowchart showing an operation of the control device of the air conditioner.
【図３】 図３は従来の空気調和機の圧縮機の運転周波
数と冷房能力との関係を示す図である。FIG. 3 is a diagram showing a relationship between an operating frequency of a compressor of a conventional air conditioner and a cooling capacity.
１…圧縮機、２…室外熱交換器、３…電動弁、４…室内
熱交換器、５…送風ファン、６…室内温度センサ、７…
吹出温度センサ、１０…制御装置、１０a…圧縮機容量
制御部、１０b…送風ファン風量制御部、１０c…室内温
度判別部、１０d…風量低下指令部。DESCRIPTION OF SYMBOLS 1 ... Compressor, 2 ... Outdoor heat exchanger, 3 ... Electric valve, 4 ... Indoor heat exchanger, 5 ... Blower fan, 6 ... Indoor temperature sensor, 7 ...
Blow-out temperature sensor, 10: control device, 10a: compressor capacity control unit, 10b: blower fan air volume control unit, 10c: indoor temperature discrimination unit, 10d: air volume reduction command unit.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ２５Ｂ 1/00 ３８３ Ｆ２５Ｂ 1/00 ３８３ (72)発明者 植草 常雄 東京都港区六本木一丁目４番33号 株式会 社エヌ・ティ・ティファシリティーズ内 (72)発明者 藁谷 至誠 東京都港区六本木一丁目４番33号 株式会 社エヌ・ティ・ティファシリティーズ内 (72)発明者 千葉 和夫 東京都港区六本木一丁目４番33号 株式会 社エヌ・ティ・ティファシリティーズ内 (72)発明者 竹上 雅章 大阪府堺市金岡町1304番地 ダイキン工業 株式会社堺製作所金岡工場内 (72)発明者 新井 健史 大阪府堺市金岡町1304番地 ダイキン工業 株式会社堺製作所金岡工場内 (72)発明者 三宅 大輔 大阪府堺市金岡町1304番地 ダイキン工業 株式会社堺製作所金岡工場内 (72)発明者 植野 武夫 大阪府堺市金岡町1304番地 ダイキン工業 株式会社堺製作所金岡工場内──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code Agency reference number FI Technical display location F25B 1/00 383 F25B 1/00 383 (72) Inventor Tsuneo Uekusa 1-4-4 Roppongi, Minato-ku, Tokyo No. 33 NTT Corporation (72) Inventor Shigenori Waratani 1-4-3 Roppongi, Minato-ku, Tokyo 1-433 Inside NTT Corporation (72) Inventor Kazuo Chiba Tokyo 1-4-3, Roppongi, Minato-ku, Japan NTT Facilities Inc. (72) Inventor Masaaki Takegami 1304, Kanaokacho, Sakai-shi, Osaka Daikin Industry Co., Ltd. Kenshi 1304 Kanaokacho, Sakai-shi, Osaka Daikin Industries Inside Sakai Works Kanaoka Plant (72) Inventor Dai Miyake 1304 Kanaokacho, Sakai-shi, Osaka Daikin Industries Kanaoka Factory, Sakai Works Co., Ltd.
Claims (3)
(３)および室内熱交換器(４)が環状に接続された冷媒回
路を備えて、上記圧縮機(１)の運転周波数を制御するこ
とによって容量制御する空気調和機において、 上記圧縮機(１)を最低運転周波数で運転中、室内温度が
設定室内温度よりも低いとき、上記室内熱交換器(４)用
の送風ファン(５)の風量を下げるようにしたことを特徴
とする空気調和機。1. Compressor (1), outdoor heat exchanger (2), expansion means
(3) and an indoor heat exchanger (4) including a refrigerant circuit connected in a ring shape, wherein the capacity of the compressor (1) is controlled by controlling the operating frequency of the compressor (1). The air conditioner is characterized in that, when the indoor temperature is lower than the set indoor temperature during operation at the lowest operating frequency, the air volume of the blower fan (5) for the indoor heat exchanger (4) is reduced. .
(３)および室内熱交換器(４)が環状に接続された冷媒回
路と、上記圧縮機(１)の運転周波数を制御することによ
って容量制御する圧縮機容量制御手段(１０a)と、上記
室内熱交換器(４)用の送風ファン(５)の風量を制御する
送風ファン風量制御手段(１０b)とを備えた空気調和機
において、 室内温度を検出する室内温度センサ(６)と、 上記室内温度センサ(６)により検出された室内温度が設
定室内温度よりも低いか否かを判別する室内温度判別手
段(１０c)と、 上記圧縮機(１)を最低運転周波数で運転中、上記室内温
度判別手段(１０c)が上記室内温度が上記設定室内温度
よりも低いと判別すると、上記送風ファン(５)の風量を
下げるように上記送風ファン風量制御手段(１０b)に指
令する風量低下指令手段(１０d)とを備えたことを特徴
とする空気調和機。2. Compressor (1), outdoor heat exchanger (2), expansion means
(3) a refrigerant circuit in which the indoor heat exchanger (4) is connected in a ring shape; compressor capacity control means (10a) for controlling the capacity by controlling the operating frequency of the compressor (1); An air conditioner provided with a blower fan air volume control means (10b) for controlling the air volume of a blower fan (5) for a heat exchanger (4); an indoor temperature sensor (6) for detecting an indoor temperature; An indoor temperature determining means (10c) for determining whether or not the indoor temperature detected by the temperature sensor (6) is lower than a set indoor temperature; and the indoor temperature while the compressor (1) is operating at the lowest operating frequency. When the determining means (10c) determines that the indoor temperature is lower than the set indoor temperature, the air flow reduction command means (10b) instructs the blowing fan air volume control means (10b) to reduce the air flow of the blowing fan (5). 10d). An air conditioner comprising:
おいて、 上記室内温度に基づいて上記圧縮機(１)の運転周波数を
制御すると共に、 吹出温度に基づいて上記送風ファン(５)の風量を制御す
ることを特徴とする空気調和機。3. The air conditioner according to claim 1, wherein the operating frequency of the compressor (1) is controlled based on the room temperature, and the blower fan (5) is controlled based on a blow-out temperature. An air conditioner characterized by controlling the air volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8187341A JPH1030840A (en) | 1996-07-17 | 1996-07-17 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8187341A JPH1030840A (en) | 1996-07-17 | 1996-07-17 | Air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1030840A true JPH1030840A (en) | 1998-02-03 |
Family
ID=16204310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8187341A Pending JPH1030840A (en) | 1996-07-17 | 1996-07-17 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1030840A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010078217A (en) * | 2008-09-25 | 2010-04-08 | Daikin Ind Ltd | Air conditioning system |
| JP2015117899A (en) * | 2013-12-19 | 2015-06-25 | 株式会社コロナ | Heat pump device |
| JP2016109372A (en) * | 2014-12-09 | 2016-06-20 | 株式会社富士通ゼネラル | Air conditioner |
| CN107560282A (en) * | 2017-09-15 | 2018-01-09 | 珠海格力电器股份有限公司 | Control method of cooling system |
| CN109556243A (en) * | 2018-09-30 | 2019-04-02 | 青岛海尔空调电子有限公司 | Control method for air conditioner |
-
1996
- 1996-07-17 JP JP8187341A patent/JPH1030840A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010078217A (en) * | 2008-09-25 | 2010-04-08 | Daikin Ind Ltd | Air conditioning system |
| JP2015117899A (en) * | 2013-12-19 | 2015-06-25 | 株式会社コロナ | Heat pump device |
| JP2016109372A (en) * | 2014-12-09 | 2016-06-20 | 株式会社富士通ゼネラル | Air conditioner |
| CN107560282A (en) * | 2017-09-15 | 2018-01-09 | 珠海格力电器股份有限公司 | Control method of cooling system |
| CN107560282B (en) * | 2017-09-15 | 2019-10-22 | 珠海格力电器股份有限公司 | Control method of cooling system |
| CN109556243A (en) * | 2018-09-30 | 2019-04-02 | 青岛海尔空调电子有限公司 | Control method for air conditioner |
| CN109556243B (en) * | 2018-09-30 | 2021-05-25 | 青岛海尔空调电子有限公司 | Control method for air conditioner |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7458227B2 (en) | Method of preventing rapid on/off of compressor in unitary air conditioner | |
| JPH1030840A (en) | Air conditioner | |
| US7174730B2 (en) | Method for controlling air conditioner having multi-compressor | |
| JPH1096545A (en) | Air conditioner and control method thereof | |
| JP6020406B2 (en) | Air conditioner | |
| KR100565242B1 (en) | Control apparatus and method for multi air condintioner in bulding | |
| JP3526393B2 (en) | Air conditioner | |
| JP2006207983A (en) | Air conditioner | |
| JPH07318184A (en) | Air conditioner | |
| JP3332012B2 (en) | Air conditioner | |
| JPH062918A (en) | Controller for air conditioner | |
| JP2542648B2 (en) | Refrigerant heating type air conditioner | |
| JP2001235211A (en) | Air conditioner | |
| JPH05346257A (en) | Air conditioner | |
| JP2906628B2 (en) | Air conditioner equipped with refrigerant heating device | |
| JP3079152B2 (en) | Air conditioner | |
| JP3353929B2 (en) | Air conditioner | |
| KR100309732B1 (en) | Control method of initial power saving operation of air conditioner | |
| KR100275557B1 (en) | Compressor controller and method for air conditioner | |
| JPH06185795A (en) | Controlling method of air conditioner | |
| JP2000249408A (en) | Refrigeration unit | |
| KR20040003703A (en) | Method for controlling compressor freguency for inverter airconditioner | |
| JP2517280B2 (en) | Reboot prevention device for compressor | |
| US20050092003A1 (en) | Method for controlling air conditioner having multi-compressor | |
| JP2000028183A (en) | Air conditioner |