JPH09210478A - Control device for air conditioner - Google Patents
Control device for air conditionerInfo
- Publication number
- JPH09210478A JPH09210478A JP8021049A JP2104996A JPH09210478A JP H09210478 A JPH09210478 A JP H09210478A JP 8021049 A JP8021049 A JP 8021049A JP 2104996 A JP2104996 A JP 2104996A JP H09210478 A JPH09210478 A JP H09210478A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- maximum allowable
- allowable frequency
- air conditioner
- maximum
- 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
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、能力可変式のヒートポ
ンプ式冷凍サイクルを備えた空気調和機の制御装置に係
わり、とくに、暖房運転時の暖房高圧過昇保護動作回数
を減少させるものに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an air conditioner equipped with a heat pump type refrigeration cycle of variable capacity, and more particularly to a device for reducing the number of heating high pressure overheating protection operations during heating operation.
【０００２】[0002]
【従来の技術】従来、能力可変式のヒートポンプ式冷凍
サイクルを備えた空気調和機の制御装置は、図１の冷凍
サイクル図に示すように、能力可変圧縮機１、四方弁
２、室外熱交換器３、減圧器４、および室内熱交換器５
等を順次連通してなるヒートポンプ式冷凍サイクルを備
え、図９のブロック図に示すように、設定温度（Ｔｓ）
等を入力する操作部１１と、室内温度（Ｔｒ）を検出す
る室内温度検出器１２と、前記室内熱交換器５の配管温
度（Ｔｐ）を検出する温度検出器１３と、商用電源３０
を所定の周波数にてスイッチングして前記能力可変圧縮
機１を駆動するインバータ回路１４と、同インバータ回
路１４を所定の周波数にて駆動するインバータ駆動回路
１５と、室内ファン７を駆動する室内ファン駆動回路１
６と、前記四方弁２を駆動する四方弁駆動回路１７と、
制御部１８とで構成し、室内温度（Ｔｒ）と設定温度
（Ｔｓ）との差（負荷）に応じて前記能力可変圧縮機の
運転許容周波数を可変し、同室内温度（Ｔｒ）と設定温
度（Ｔｓ）との差（負荷）と室内温度（Ｔｒ）の時間的
な変化率により制御して、運転周波数を上げたり下げた
りすることにより、快適性を保つようにしている。しか
しながら、このような空気調和機において、暖房運転時
に、暖房過負荷状態となり、能力可変圧縮機の運転周波
数が上昇して圧縮機の能力が高まり、高圧側圧力が異常
上昇すると、能力可変圧縮機１等の破壊の恐れがあるた
め、室内熱交換器５の配管温度（Ｔｐ）を検出し、つま
り、高圧側圧力を間接的に検知し、同配管温度（Ｔｐ）
が所定の設定値（Ｔｐｓ）を越えると前記能力可変圧縮
機１の運転周波数を所定値まで強制的に低下させて、暖
房高圧過昇保護動作を行うようにしている。しかし、上
述のような暖房高圧過昇保護動作が頻繁に起こり能力可
変圧縮機の運転周波数を変動させると、消費電力が多く
なるという問題があった。2. Description of the Related Art Conventionally, as shown in a refrigeration cycle diagram of FIG. 1, a control device for an air conditioner having a heat pump type refrigeration cycle of variable capacity has a variable capacity compressor 1, a four-way valve 2, and an outdoor heat exchange. Vessel 3, pressure reducer 4, and indoor heat exchanger 5
As shown in the block diagram of FIG. 9, a set temperature (Ts)
And the like, an indoor temperature detector 12 for detecting an indoor temperature (Tr), a temperature detector 13 for detecting a pipe temperature (Tp) of the indoor heat exchanger 5, and a commercial power supply 30.
Circuit 14 for driving the variable capacity compressor 1 by switching at a predetermined frequency, an inverter drive circuit 15 for driving the inverter circuit 14 at a predetermined frequency, and an indoor fan drive for driving the indoor fan 7. Circuit 1
6 and a four-way valve drive circuit 17 for driving the four-way valve 2,
The control unit 18 is configured to change the operation allowable frequency of the variable capacity compressor according to the difference (load) between the room temperature (Tr) and the set temperature (Ts) to set the room temperature (Tr) and the set temperature. The comfort is maintained by raising or lowering the operating frequency by controlling with the time (rate) change rate of the difference (load) from (Ts) and the room temperature (Tr). However, in such an air conditioner, when a heating overload occurs during heating operation, the operating frequency of the variable capacity compressor rises, the capacity of the compressor increases, and the high-pressure side pressure rises abnormally, the variable capacity compressor Since there is a risk of destruction of 1 etc., the pipe temperature (Tp) of the indoor heat exchanger 5 is detected, that is, the high-pressure side pressure is indirectly detected, and the pipe temperature (Tp) is detected.
Exceeds a predetermined set value (Tps), the operating frequency of the variable capacity compressor 1 is forcibly reduced to a predetermined value to perform the heating high pressure overheat protection operation. However, if the heating high pressure overheat protection operation frequently occurs as described above and the operating frequency of the variable capacity compressor is changed, there is a problem that power consumption increases.
【０００３】[0003]
【発明が解決しようとする課題】本発明は以上述べた問
題点を解決し、不要な暖房高圧過昇保護動作を頻繁に起
こして運転周波数を異常に上下することなく、暖房効率
の向上、長寿命化を図れる空気調和機の制御装置を提供
することを目的としている。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and improves heating efficiency without lengthening the operating frequency abnormally by frequently causing unnecessary heating high pressure overheat protection operation. It is an object of the present invention to provide a control device for an air conditioner that has a long life.
【０００４】[0004]
【課題を解決するための手段】本発明は上述の課題を解
決するため、能力可変圧縮機、四方弁、室外熱交換器、
減圧器、および室内熱交換器等を順次連通してなるヒー
トポンプ式冷凍サイクルを備え、負荷に応じて前記能力
可変圧縮機の運転周波数を制御するものであって、前記
室内熱交換器の配管温度を検出する温度検出器を備え、
同配管温度が所定の設定値を越えると前記能力可変圧縮
機の運転周波数を、所定の設定値を越えた時の運転周波
数に応じた所定値低下させて暖房高圧過昇保護動作を行
う空気調和機において、所定時間内の前記暖房高圧過昇
保護動作の回数をカウントするカウンタと、同カウント
数に応じて前記能力可変圧縮機の最大許容周波数を決定
する最大許容周波数決定手段と、同最大許容周波数を記
憶する最大許容周波数記憶部を設け、通常運転時は、前
記最大許容周波数を能力可変圧縮機の運転周波数の上限
値として制御するようにしている。In order to solve the above problems, the present invention provides a variable capacity compressor, a four-way valve, an outdoor heat exchanger,
A heat pump type refrigeration cycle in which a decompressor, an indoor heat exchanger, etc. are sequentially communicated with each other, and the operating frequency of the variable capacity compressor is controlled according to the load, and the piping temperature of the indoor heat exchanger is controlled. Equipped with a temperature detector to detect
When the pipe temperature exceeds a predetermined set value, the operating frequency of the variable capacity compressor is lowered by a predetermined value according to the operating frequency when the set temperature exceeds the predetermined set value to perform heating high pressure overheat protection operation. In the compressor, a counter for counting the number of times of the heating high pressure overheating protection operation within a predetermined time, a maximum permissible frequency determining means for determining the maximum permissible frequency of the variable capacity compressor according to the count number, and a maximum permissible frequency. A maximum allowable frequency storage unit for storing the frequency is provided, and during normal operation, the maximum allowable frequency is controlled as the upper limit value of the operating frequency of the variable capacity compressor.
【０００５】そして、前記最大許容周波数決定手段は、
予め回数に対する増加または減少する周波数を記憶する
テーブルと、同テーブルよりの周波数を前記最大許容周
波数を記憶する記憶部に記憶する最大許容周波数に加算
して新たな最大許容周波数を算出する演算部とで構成す
るようにした。The maximum allowable frequency determining means is
A table that stores a frequency that increases or decreases with respect to the number of times in advance, and a calculation unit that calculates a new maximum allowable frequency by adding the frequency from the table to the maximum allowable frequency stored in the storage unit that stores the maximum allowable frequency. I made it consist of.
【０００６】さらに、前記最大許容周波数決定手段は、
前記能力可変圧縮機の絶対最大周波数を記憶する絶対最
大周波数記憶部と比較部を備え、前記絶対最大周波数と
新たな最大許容周波数とを比較し、新たな最大許容周波
数が絶対最大周波数を越える場合は、絶対最大周波数を
新たな最大許容周波数とするようにした。Further, the maximum allowable frequency determining means is
When the absolute maximum frequency storage unit for storing the absolute maximum frequency of the variable capacity compressor and a comparison unit are provided, the absolute maximum frequency is compared with a new maximum allowable frequency, and the new maximum allowable frequency exceeds the absolute maximum frequency. Made the absolute maximum frequency a new maximum allowable frequency.
【０００７】[0007]
【作用】以上のように構成したので、本発明の空気調和
機の制御装置においては、暖房運転時に、室内熱交換器
の配管温度を検出し、同配管温度が所定の設定温度を越
えると能力可変圧縮機の運転周波数を低下させる暖房高
圧過昇保護動作を行い、所定時間内の前記暖房高圧過昇
保護動作の回数をカウントし、同カウント数に応じて前
記能力可変圧縮機の最大許容周波数を決め、同最大許容
周波数で能力可変圧縮機の運転周波数を制限することに
より、室内熱交換器の高圧圧力が過圧になるのを防ぎ、
暖房高圧過昇保護動作の回数を減らすことができる。With the above construction, the control device for an air conditioner of the present invention detects the pipe temperature of the indoor heat exchanger during heating operation, and when the pipe temperature exceeds a predetermined set temperature, the capacity is exceeded. The heating high pressure overheat protection operation that reduces the operating frequency of the variable compressor is performed, the number of times of the heating high pressure overheat protection operation within a predetermined time is counted, and the maximum allowable frequency of the variable capacity compressor is determined according to the count number. To prevent the high pressure of the indoor heat exchanger from becoming overpressure by limiting the operating frequency of the variable capacity compressor at the maximum allowable frequency.
It is possible to reduce the number of heating high-voltage overheat protection operations.
【０００８】[0008]
【実施例】以下、図面に基づいて本発明による空気調和
機の制御装置を詳細に説明する。図２は本発明による空
気調和機の制御装置の一実施例を示すブロック図であ
る。本発明による能力可変式のヒートポンプ式冷凍サイ
クルを備えた空気調和機の制御装置は、図１の冷凍サイ
クル図に示すように、能力可変圧縮機１、四方弁２、室
外熱交換器３、減圧器４、および室内熱交換器５等を順
次連通してなるヒートポンプ式冷凍サイクルを備え、図
２のブロック図に示すように、設定温度（Ｔｓ）等を入
力する操作部１１と、室内温度（Ｔｒ）を検出する室内
温度検出器１２と、前記室内熱交換器５の配管温度（Ｔ
ｐ）を検出する温度検出器１３と、商用電源３０を整流
した整流電圧をスイッチングして前記能力可変圧縮機１
を駆動するインバータ回路１４と、同インバータ回路１
４を所定の運転周波数（ｆ）で駆動するインバータ駆動
回路１５と、室内ファン７を駆動する室内ファン駆動回
路１６と、前記四方弁２を駆動する四方弁駆動回路１７
と、制御部１８に加えて、所定時間内の前記暖房高圧過
昇保護動作の回数（ｎ）をカウントするカウンタ１９
と、同カウント数に応じて前記能力可変圧縮機の最大許
容周波数（ｆａｍａｘ）を決定する最大周波数決定手段
２０と、同最大許容周波数（ｆａｍａｘ）等を記憶する
記憶部２１および前記所定時間を出力するタイマー２２
を設け、通常運転時は、前記最大許容周波数（ｆａｍａ
ｘ）を能力可変圧縮機１を制御する運転周波数（ｆ）の
上限値としている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An air conditioner control apparatus according to the present invention will be described below in detail with reference to the drawings. FIG. 2 is a block diagram showing an embodiment of a control device for an air conditioner according to the present invention. As shown in the refrigeration cycle diagram of FIG. 1, a control device for an air conditioner having a variable capacity heat pump type refrigeration cycle according to the present invention includes a variable capacity compressor 1, a four-way valve 2, an outdoor heat exchanger 3, and a decompression device. The heat pump type refrigerating cycle in which the vessel 4, the indoor heat exchanger 5 and the like are sequentially connected to each other is provided, and as shown in the block diagram of FIG. 2, the operation unit 11 for inputting the set temperature (Ts) and the indoor temperature ( Indoor temperature detector 12 for detecting Tr) and the pipe temperature (T) of the indoor heat exchanger 5.
p) and the variable capacity compressor 1 by switching the rectified voltage obtained by rectifying the commercial power source 30 and the temperature detector 13.
Inverter circuit 14 for driving the
4 drives at a predetermined operating frequency (f), an inverter drive circuit 15 that drives the indoor fan 7, and a four-way valve drive circuit 17 that drives the four-way valve 2.
In addition to the control unit 18, a counter 19 that counts the number of times (n) the heating high pressure overheat protection operation is performed within a predetermined time.
And a maximum frequency determining means 20 for determining the maximum permissible frequency (famax) of the variable capacity compressor according to the same count number, a storage unit 21 for storing the maximum permissible frequency (famax) and the predetermined time. Timer 22
The maximum allowable frequency (fama) is set during normal operation.
x) is the upper limit of the operating frequency (f) that controls the variable capacity compressor 1.
【０００９】前記最大許容周波数決定手段２０は、図４
に示すように、予め回数に対する増加または減少する変
化周波数（Δｆ）を記憶する変化テーブル２０１と、同
変化テーブル２０１よりの変化周波数（Δｆ）を前記記
憶部２１に記憶する最大許容周波数（ｆａｍａｘ）に加
算して新たな最大許容周波数（ｆａｍａｘ’＝ｆａｍａ
ｘ＋Δｆ）を算出する演算部２０２とで構成するように
した。The maximum allowable frequency determining means 20 is shown in FIG.
As shown in FIG. 4, a change table 201 that stores a change frequency (Δf) that increases or decreases with respect to the number of times in advance, and a maximum allowable frequency (famax) that stores the change frequency (Δf) from the change table 201 in the storage unit 21. To the new maximum allowable frequency (famax '= fama
x + Δf) and the arithmetic unit 202 for calculating.
【００１０】さらに、前記最大許容周波数決定手段２０
は、前記能力可変圧縮機１の絶対最大周波数（Ｆｍａ
ｘ）を記憶する絶対周波数記憶部２０３と比較部２０４
を備え、同比較部２０４で絶対周波数記憶部２０３に記
憶する絶対最大周波数（Ｆｍａｘ）と前記演算部２０２
よりの新たな最大許容周波数（ｆａｍａｘ’）とを比較
し、新たな最大許容周波数（ｆａｍａｘ’）が絶対最大
周波数（Ｆｍａｘ）を越える場合（ｆａｍａｘ’＞Ｆｍ
ａｘ）は、許容最大周波数（Ｆｍａｘ）を新たな最大許
容周波数（ｆａｍａｘ’）とするようにした。Further, the maximum allowable frequency determining means 20
Is the absolute maximum frequency (Fma of the variable capacity compressor 1).
x) is stored in the absolute frequency storage unit 203 and the comparison unit 204.
And the absolute maximum frequency (Fmax) stored in the absolute frequency storage unit 203 in the comparison unit 204 and the calculation unit 202.
When the new maximum allowable frequency (famax ') exceeds the absolute maximum frequency (Fmax) (famax'> Fm)
ax), the maximum allowable frequency (Fmax) is set as a new maximum allowable frequency (famax ′).
【００１１】以上の構成において、つぎにその動作を説
明するが、まず、通常動作について説明する。図５は通
常運転時の室内温度（Ｔｒ）と設定温度（Ｔｓ）との差
（Ｔｌ＝（負荷））に対する許容周波数（ｆａ）を示す
もので、最大許容周波数（ｆａｍａｘ）は差（Ｔｌ＝
（負荷））がある値以上であれば一定の値としている。
図６は室内温度（Ｔｒ）と設定温度（Ｔｓ）との差（Ｔ
ｌ＝（負荷））と室内温度（Ｔｒ）の時間的変化率（Δ
Ｔｒ）をパラメータとして変化周波数を前記記憶部２１
に記憶する動作テーブルを示している。図に示すよう
に、室内温度（Ｔｒ）と設定温度（Ｔｓ）との差（Ｔｌ
＝（負荷））に対する許容周波数（ｆａ）を求めるとと
もに、室内温度（Ｔｒ）と設定温度（Ｔｓ）との差（Ｔ
ｌ＝（負荷））および、室内温度（Ｔｒ）の時間的変化
率（ΔＴｒ）より前記動作テーブルを参照して現在の運
転周波数（ｆ）に対する変化周波数（Δｆ）を求め、前
記許容周波数（ｆａ）を上限とする動作周波数（ｆ）を
決定して能力可変圧縮機１を制御している。The operation of the above structure will be described below. First, the normal operation will be described. FIG. 5 shows the allowable frequency (fa) with respect to the difference (Tl = (load)) between the indoor temperature (Tr) and the set temperature (Ts) during normal operation, and the maximum allowable frequency (famax) is the difference (Tl =
If the (load) is greater than a certain value, it is set to a constant value.
FIG. 6 shows the difference (T) between the room temperature (Tr) and the set temperature (Ts).
l = (load)) and the temporal change rate (Δ) of the room temperature (Tr)
Tr) as a parameter, and the change frequency is stored in the storage unit 21.
The operation table stored in FIG. As shown in the figure, the difference (Tl) between the room temperature (Tr) and the set temperature (Ts)
= (Load)), the allowable frequency (fa) is calculated, and the difference (T) between the room temperature (Tr) and the set temperature (Ts) is calculated.
l = (load)) and the temporal change rate (ΔTr) of the room temperature (Tr), the change frequency (Δf) with respect to the current operating frequency (f) is obtained by referring to the operation table, and the allowable frequency (fa) is obtained. ) Is the upper limit, and the variable capacity compressor 1 is controlled by determining the operating frequency (f).
【００１２】つぎに、暖房高圧過昇保護動作について説
明する。いま、暖房運転時に、室内温度（Ｔｒ）と設定
温度（Ｔｓ）との差（Ｔｌ＝（負荷））が大きくなり暖
房過負荷状態となると運転周波数（ｆ）を最大許容周波
数（ｆａｍａｘ）まで上げて能力可変圧縮機１の能力最
大で運転するように制御されるが、このとき、図７に示
すように、前記配管温度（Ｔｐ）が所定の設定値（Ｔｐ
ｓ）を越え（Ｔｐ＞Ｔｐｓ）ると、能力可変圧縮機１の
許容周波数（ｆａ）を図８に示す記憶部２１に記憶する
暖房高圧過昇保護動作テーブルを参照して、その時の運
転周波数（ｆ）に対して決定される許容周波数（ｆａ＝
ｆａｄ）に強制的に低下させ、同許容周波数（ｆａ＝ｆ
ａｄ）を上限とする運転周波数（ｆ）を決定して能力可
変圧縮機１を制御している。Next, the heating high pressure overheating protection operation will be described. Now, during heating operation, when the difference (Tl = (load)) between the room temperature (Tr) and the set temperature (Ts) becomes large and the heating overload condition occurs, the operating frequency (f) is increased to the maximum allowable frequency (famax). The variable capacity compressor 1 is controlled to operate at the maximum capacity. At this time, as shown in FIG. 7, the pipe temperature (Tp) is set to a predetermined set value (Tp).
s) (Tp> Tps), the allowable frequency (fa) of the variable capacity compressor 1 is referred to the heating high pressure overheating protection operation table stored in the storage unit 21 shown in FIG. Allowable frequency determined for (f) (fa =
forcibly lowering to the same allowable frequency (fa = f
The variable capacity compressor 1 is controlled by determining the operating frequency (f) whose upper limit is (ad).
【００１３】つぎに、暖房高圧過昇保護動作が繰り返し
発生する場合の動作を図３の動作フローを参照して説明
する。図３の動作フローに示すように、タイマー２２を
セット（Ｓ１）して、所定時間（例えば１時間）内で起
こる前記暖房高圧過昇保護動作の回数（ｎ）をカウンタ
１９にてカウント（Ｓ２）し、同カウントした回数
（ｎ）を基に、図４に示す補正テーブル２０１の内容を
参照し、例えば、回数（ｎ＝３）に対する可変周波数
（Δｆｎ＝Δｆ３）を求め（Ｓ３）、同値を前記記憶部
２１に記憶する最大許容周波数（ｆａｍａｘ）に加算し
て新たな最大許容周波数（ｆａｍａｘ’＝ｆａｍａｘ＋
Δｆ３）を算出（Ｓ４）し、この新たな最大許容周波数
（ｆａｍａｘｎ）に前記記憶部２１を書き換え（Ｓ
５）、通常運転時に、新たな最大許容周波数（ｆａｍａ
ｘ’）を運転周波数（ｆ）の上限値として、能力可変圧
縮機１の運転周波数（ｆ）を制御するようにしている。Next, the operation in the case where the heating high pressure overheating protection operation repeatedly occurs will be described with reference to the operation flow of FIG. As shown in the operation flow of FIG. 3, the timer 22 is set (S1), and the counter 19 counts the number (n) of the heating high pressure overheat protection operations that occur within a predetermined time (for example, 1 hour) (S2). ), The variable frequency (Δfn = Δf3) with respect to the number of times (n = 3) is obtained (S3) by referring to the contents of the correction table 201 shown in FIG. Is added to the maximum allowable frequency (famax) stored in the storage unit 21 to obtain a new maximum allowable frequency (famax '= famax +).
Δf3) is calculated (S4), and the storage unit 21 is rewritten to the new maximum allowable frequency (famaxn) (S4).
5) During normal operation, the new maximum allowable frequency (fama)
The operating frequency (f) of the variable capacity compressor 1 is controlled by setting x ′) to the upper limit of the operating frequency (f).
【００１４】また、前記加算して得た、新たな最大許容
周波数（ｆａｍａｘ’＝ｆａｍａｘ＋Δｆ３）を絶対周
波数記憶部２０３に記憶する絶対最大周波数（Ｆｍａ
ｘ）と比較（Ｓ６）し、新たな最大許容周波数（ｆａｍ
ａｘ’）が絶対最大周波数（Ｆｍａｘ）より大きくなっ
た（ｆａｍａｘ’＞Ｆｍａｘ）場合は、絶対最大周波数
（Ｆｍａｘ）を新たな最大許容周波数（ｆａｍａｘ’＝
Ｆｍａｘ）としている（Ｓ７）。Further, the new maximum allowable frequency (famax '= famax + Δf3) obtained by the addition is stored in the absolute frequency storage unit 203 in the absolute maximum frequency (Fma).
x) and the new maximum allowable frequency (fam)
ax ') becomes larger than the absolute maximum frequency (Fmax) (famax'> Fmax), the absolute maximum frequency (Fmax) is changed to a new maximum allowable frequency (famax '=
Fmax) (S7).
【００１５】また、図４に示す補正テーブルの内容を所
定回数（ｎｓ）以上（ｎ＞ｎｓ）のときは（−Δｆ）と
し、所定回数以下（ｎ＜ｎｓ）のときは（０）としても
よいことは説明するまでもない。The contents of the correction table shown in FIG. 4 may be (-Δf) when the number of times is a predetermined number (ns) or more (n> ns), and may be (0) when the number of times is less than the predetermined number (n <ns). It goes without saying that the good things are.
【００１６】[0016]
【発明の効果】以上説明したように、本発明による空気
調和機の制御装置によれば、暖房運転時に、室内熱交換
器の配管温度を検出し、同配管温度が所定の設定温度を
越えると能力可変圧縮機の許容周波数を低下させる暖房
高圧過昇保護動作を行い、所定時間内の前記暖房高圧過
昇保護動作の回数をカウントし、同カウント数に応じて
前記能力可変圧縮機の最大許容周波数を決め、同能力可
変圧縮機の最大許容周波数を制限することにより、室内
熱交換器の高圧圧力が過圧になるのを防ぎ、暖房高圧過
昇保護動作の回数を減らすので、不要な暖房高圧過昇保
護動作を頻繁に起こして運転周波数を異常に上下するこ
となく、暖房効率の向上、長寿命化を図れる空気調和機
の制御装置を提供することができる。As described above, according to the control device for an air conditioner of the present invention, the pipe temperature of the indoor heat exchanger is detected during the heating operation, and when the pipe temperature exceeds a predetermined set temperature. Performs a heating high pressure overheat protection operation that lowers the allowable frequency of the variable capacity compressor, counts the number of heating high pressure overheat protection operations within a predetermined time, and according to the count, the maximum allowable capacity variable compressor By determining the frequency and limiting the maximum allowable frequency of the variable capacity compressor, it is possible to prevent the high pressure of the indoor heat exchanger from becoming overpressure and reduce the number of heating high pressure overheat protection operations. It is possible to provide a control device for an air conditioner that can improve heating efficiency and extend the life of the device without causing a high-voltage overheating protection operation frequently to raise or lower the operating frequency abnormally.
【図１】空気調和機の冷凍サイクルを示す冷凍サイクル
図である。FIG. 1 is a refrigeration cycle diagram showing a refrigeration cycle of an air conditioner.
【図２】本発明の空気調和機の制御装置の一実施例を示
すブロック図である。FIG. 2 is a block diagram showing an embodiment of a control device for an air conditioner of the present invention.
【図３】本発明の空気調和機の制御装置の動作フローチ
ャートである。FIG. 3 is an operation flowchart of the control device for an air conditioner of the present invention.
【図４】本発明の空気調和機の制御装置の補正テーブル
の内容例を示す図である。FIG. 4 is a diagram showing an example of contents of a correction table of the control device for an air conditioner of the present invention.
【図５】室内温度と設定温度との差（負荷）に対する許
容周波数を示す図である。FIG. 5 is a diagram showing an allowable frequency with respect to a difference (load) between an indoor temperature and a set temperature.
【図６】動作テーブルの内容例を示す図である。FIG. 6 is a diagram showing an example of contents of an operation table.
【図７】配管温度（Ｔｐ）の暖房高圧過昇保護動作温度
を示す図である。FIG. 7 is a diagram showing a heating high pressure overheating protection operating temperature of a pipe temperature (Tp).
【図８】暖房高圧過昇保護動作テーブルの内容例を示す
図である。FIG. 8 is a diagram showing an example of contents of a heating high pressure overheat protection operation table.
【図９】従来の空気調和機の制御装置を示すブロック図
である。FIG. 9 is a block diagram showing a control device for a conventional air conditioner.
１ 能力可変圧縮機 ２ 四方弁 ３ 室外熱交換器 ４ 減圧器 ５ 室内熱交換器 ６ 室外ファン ７ 室内ファン １１ 操作部 １２ 室内温度検出器 １３ 熱交換器温度検出器 １４ インバータ回路 １５ インバータ駆動回路 １６ 室内ファン駆動回路 １７ 四方弁駆動回路 １８ 制御部 １９ カウンター ２０ 最大許容周波数決定手段 ２１ 記憶部 ２２ タイマー ２０１ 変化テーブル ２０２ 演算部 ２０３ 絶対周波数記憶部 ２０４ 比較部 1 Variable capacity compressor 2 Four-way valve 3 Outdoor heat exchanger 4 Pressure reducer 5 Indoor heat exchanger 6 Outdoor fan 7 Indoor fan 11 Operating part 12 Indoor temperature detector 13 Heat exchanger temperature detector 14 Inverter circuit 15 Inverter drive circuit 16 Indoor fan drive circuit 17 Four-way valve drive circuit 18 Control section 19 Counter 20 Maximum allowable frequency determination means 21 Storage section 22 Timer 201 Change table 202 Calculation section 203 Absolute frequency storage section 204 Comparison section
Claims (3)
器、減圧器、および室内熱交換器等を順次連通してなる
ヒートポンプ式冷凍サイクルを備え、負荷に応じて前記
能力可変圧縮機の運転周波数を制御するものであって、
前記室内熱交換器の配管温度を検出する温度検出器を備
え、同配管温度が所定の設定値を越えると前記能力可変
圧縮機の運転周波数を、所定の設定値を越えた時の運転
周波数に応じた所定値低下させて暖房高圧過昇保護動作
を行う空気調和機において、所定時間内の前記暖房高圧
過昇保護動作の回数をカウントするカウンタと、同カウ
ント数に応じて前記能力可変圧縮機の新たな最大許容周
波数を決定する最大許容周波数決定手段と、同新たな最
大許容周波数を記憶する最大許容周波数記憶部を設け、
通常運転時は、同最大許容周波数記憶部に記憶する最大
許容周波数を能力可変圧縮機の運転周波数の上限値とし
て制御するようにしてなることを特徴とする空気調和機
の制御装置。1. A heat pump type refrigeration cycle in which a variable capacity compressor, a four-way valve, an outdoor heat exchanger, a decompressor, an indoor heat exchanger and the like are sequentially connected to each other, and the variable capacity compressor is Which controls the operating frequency,
A temperature detector for detecting the pipe temperature of the indoor heat exchanger is provided, and when the pipe temperature exceeds a predetermined set value, the operating frequency of the variable capacity compressor is set to the operating frequency when the set temperature is exceeded. In an air conditioner that performs a heating high pressure overheat protection operation by lowering a predetermined value according to the counter, a counter that counts the number of times of the heating high pressure overheat protection operation within a predetermined time, and the capacity variable compressor according to the count number. A maximum allowable frequency determining means for determining a new maximum allowable frequency of, and a maximum allowable frequency storage unit for storing the new maximum allowable frequency,
An air conditioner control device characterized in that during normal operation, the maximum allowable frequency stored in the maximum allowable frequency storage section is controlled as an upper limit of the operating frequency of the variable capacity compressor.
数に対する増加または減少する周波数を記憶するテーブ
ルと、同テーブルよりの周波数を前記最大許容周波数を
記憶する記憶部に記憶する最大許容周波数に加算して新
たな最大許容周波数を算出する演算部とでなることを特
徴とする請求項１記載の空気調和機の制御装置。2. The maximum permissible frequency determining means adds in advance a table that stores frequencies that increase or decrease with respect to the number of times, and a frequency from the table to the maximum permissible frequency stored in a storage unit that stores the maximum permissible frequency. The control device for an air conditioner according to claim 1, further comprising a calculation unit that calculates a new maximum allowable frequency.
力可変圧縮機の絶対最大周波数を記憶する絶対最大周波
数記憶部と比較部を備え、前記絶対最大周波数と新たな
最大許容周波数とを比較し、新たな最大許容周波数が絶
対最大周波数を越える場合は、絶対最大周波数を新たな
最大許容周波数としてなることを特徴とする請求項２記
載の空気調和機の制御装置。3. The maximum allowable frequency determining means includes an absolute maximum frequency storage section for storing an absolute maximum frequency of the variable capacity compressor and a comparing section, and compares the absolute maximum frequency with a new maximum allowable frequency. The air conditioner control device according to claim 2, wherein when the new maximum allowable frequency exceeds the absolute maximum frequency, the absolute maximum frequency is set as the new maximum allowable frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8021049A JPH09210478A (en) | 1996-02-07 | 1996-02-07 | Control device for air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8021049A JPH09210478A (en) | 1996-02-07 | 1996-02-07 | Control device for air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09210478A true JPH09210478A (en) | 1997-08-12 |
Family
ID=12044073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8021049A Pending JPH09210478A (en) | 1996-02-07 | 1996-02-07 | Control device for air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09210478A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040003707A (en) * | 2002-07-03 | 2004-01-13 | 엘지전자 주식회사 | Method for controlling compressor frequency for airconditioner |
| JP2007107825A (en) * | 2005-10-14 | 2007-04-26 | Matsushita Electric Ind Co Ltd | Heat pump water heater |
| JP2014055718A (en) * | 2012-09-12 | 2014-03-27 | Fujitsu General Ltd | Heat pump cycle device |
| WO2014141381A1 (en) * | 2013-03-12 | 2014-09-18 | 三菱電機株式会社 | Air conditioning apparatus |
| CN107255306A (en) * | 2017-05-19 | 2017-10-17 | 海信（山东）空调有限公司 | A kind of Combined frequency-change air-conditioning and its control method |
| CN110145889A (en) * | 2019-06-12 | 2019-08-20 | 珠海格力电器股份有限公司 | The method of air-conditioner system, air conditioner and air-conditioner system control |
| CN113280488A (en) * | 2021-05-31 | 2021-08-20 | 广东美的制冷设备有限公司 | Control method of air conditioner, air conditioner and computer storage medium |
| CN113508045A (en) * | 2019-04-04 | 2021-10-15 | 三电汽车空调***株式会社 | Air conditioner for vehicle |
| CN115451542A (en) * | 2022-08-08 | 2022-12-09 | 宁波奥克斯电气股份有限公司 | Variable frequency air conditioner system control method and device and variable frequency air conditioner |
-
1996
- 1996-02-07 JP JP8021049A patent/JPH09210478A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040003707A (en) * | 2002-07-03 | 2004-01-13 | 엘지전자 주식회사 | Method for controlling compressor frequency for airconditioner |
| JP2007107825A (en) * | 2005-10-14 | 2007-04-26 | Matsushita Electric Ind Co Ltd | Heat pump water heater |
| JP4701982B2 (en) * | 2005-10-14 | 2011-06-15 | パナソニック株式会社 | Heat pump water heater |
| JP2014055718A (en) * | 2012-09-12 | 2014-03-27 | Fujitsu General Ltd | Heat pump cycle device |
| WO2014141381A1 (en) * | 2013-03-12 | 2014-09-18 | 三菱電機株式会社 | Air conditioning apparatus |
| JP5996089B2 (en) * | 2013-03-12 | 2016-09-21 | 三菱電機株式会社 | Air conditioner |
| CN107255306A (en) * | 2017-05-19 | 2017-10-17 | 海信（山东）空调有限公司 | A kind of Combined frequency-change air-conditioning and its control method |
| CN113508045A (en) * | 2019-04-04 | 2021-10-15 | 三电汽车空调***株式会社 | Air conditioner for vehicle |
| CN113508045B (en) * | 2019-04-04 | 2024-05-14 | 三电有限公司 | Air conditioner for vehicle |
| CN110145889A (en) * | 2019-06-12 | 2019-08-20 | 珠海格力电器股份有限公司 | The method of air-conditioner system, air conditioner and air-conditioner system control |
| CN113280488A (en) * | 2021-05-31 | 2021-08-20 | 广东美的制冷设备有限公司 | Control method of air conditioner, air conditioner and computer storage medium |
| CN115451542A (en) * | 2022-08-08 | 2022-12-09 | 宁波奥克斯电气股份有限公司 | Variable frequency air conditioner system control method and device and variable frequency air conditioner |
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