JP2882172B2 - Air conditioner - Google Patents

Air conditioner

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Publication number
JP2882172B2
JP2882172B2 JP4065890A JP6589092A JP2882172B2 JP 2882172 B2 JP2882172 B2 JP 2882172B2 JP 4065890 A JP4065890 A JP 4065890A JP 6589092 A JP6589092 A JP 6589092A JP 2882172 B2 JP2882172 B2 JP 2882172B2
Authority
JP
Japan
Prior art keywords
pressure
heat exchanger
compressor
temperature
outdoor heat
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.)
Expired - Lifetime
Application number
JP4065890A
Other languages
Japanese (ja)
Other versions
JPH05264107A (en
Inventor
一暢 城島
信之 宮崎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP4065890A priority Critical patent/JP2882172B2/en
Publication of JPH05264107A publication Critical patent/JPH05264107A/en
Application granted granted Critical
Publication of JP2882172B2 publication Critical patent/JP2882172B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】この発明は空気調和機に係り、特
に制御装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly to a control device.

【0002】[0002]

【従来の技術】図4は例えば、特開昭63−23325
5号公報に示された従来の空気調和機の冷媒回路であ
り、図において1は冷媒を圧縮し吐き出す圧縮機、2は
この圧縮機1への冷媒入路及び出路を切り換える四方
弁、3は室外熱交換器、4は電動式膨張弁、5は室内熱
交換器で、これら圧縮機1、四方弁2、室外熱交換器
3、電動式膨張弁4を順次冷媒配管6により接続し冷媒
回路を構成している。7はバイパス配管で、上記圧縮機
1の吐出側高圧配管6aト吸入側低圧配管6bとを連結
している。8はこのバイパス管7途中に配設されている
電磁弁。9はこの電磁弁8を含室内ユニットの制御機
器を操作する制御ユニット、10は吐出冷媒ガス温度を
検知する検知器である。
2. Description of the Related Art FIG.
FIG. 1 shows a refrigerant circuit of a conventional air conditioner shown in Japanese Patent Application Publication No. 5 (1993) -207, in which 1 is a compressor that compresses and discharges refrigerant, 2 is a four-way valve that switches refrigerant inlet and outlet to this compressor 1, and 3 is An outdoor heat exchanger, 4 is an electric expansion valve, and 5 is an indoor heat exchanger. The compressor 1, the four-way valve 2, the outdoor heat exchanger 3, and the electric expansion valve 4 are sequentially connected by a refrigerant pipe 6, and a refrigerant circuit is provided. Is composed. Reference numeral 7 denotes a bypass pipe which connects the discharge-side high-pressure pipe 6a and the suction-side low-pressure pipe 6b of the compressor 1 to each other. Reference numeral 8 denotes a solenoid valve provided in the middle of the bypass pipe 7. 9 the control unit for operating the control device including the indoor unit of the electromagnetic valve 8, 10 is a detector for detecting the discharged refrigerant gas temperature.

【0003】次に動作について説明する。冷房運転時に
おいて、冷媒は圧縮機1より四方弁2を経て室外熱交換
器3に送られ、凝縮して液化した後、電動式膨張弁4に
て減圧され室内熱交換器5にて蒸発しガス冷媒となって
四方弁2を通過して圧縮機1にもどる。
Next, the operation will be described. During cooling operation, the refrigerant is sent to the outdoor heat exchanger 3 through the four-way valve 2 from the compressor 1, after liquefied by condensation at depressurized chamber heat exchanger 5 by the electric expansion valve 4 It evaporates and becomes a gas refrigerant, passes through the four-way valve 2 and returns to the compressor 1.

【0004】この様な冷房運転サイクルを形成している
状態で、仮りに、冷凍サイクル形成上、異常と思われる
設定温度以上に吐出冷媒ガス温度が上昇した場合は、こ
れを制御ユニット9は検知器10にて検知して圧縮機1
を一時的に停止する様に制御する。この時、今まで閉状
態にあったバイパス管7の電磁弁8を同時に開状態にす
る様に制御ユニット9は制御を行なう、これらの制御を
行なうことより一度圧縮機1より吐出された冷媒ガスが
圧縮機1の停止により液化して逆流した場合でも、その
一部はバイパス管7を経て低圧側配管6bに流入し、吐
出配管6aが高圧になることなくサイクル配管内の圧力
がバランスのとれた状態に収束し、圧縮機1の再起動時
に高負荷をかけることなく冷凍サイクルを再開するよう
になっている。
In the state where such a cooling operation cycle is formed, if the temperature of the discharged refrigerant gas rises above a set temperature considered to be abnormal in the formation of the refrigeration cycle, the control unit 9 detects this. Compressor 1 detected by compressor 10
Is controlled to stop temporarily. At this time, the control unit 9 performs control so that the solenoid valve 8 of the bypass pipe 7 which has been closed up to now is simultaneously opened. By performing these controls, the refrigerant gas once discharged from the compressor 1 is controlled. Is liquefied and flows backward due to the stoppage of the compressor 1, a part of it flows into the low pressure side pipe 6b via the bypass pipe 7, and the pressure in the cycle pipe is balanced without the discharge pipe 6a becoming high pressure. And the refrigeration cycle is restarted without applying a high load when the compressor 1 is restarted.

【0005】[0005]

【発明が解決しようとする課題】従来の空気調和機の制
御装置は以上のように構成されており、冷房運転時、外
気温度が高い条件等の冷房過負荷条件において、冷媒温
度や圧力の異常上昇などにより保護装置の動作を検知し
た場合、空気調和機の運転を停止させてしまい、冷房効
果が果たせなくなる問題点があった。又、過負荷条件な
どで保護装置が作動した場合、一端停止するとバイパス
弁を開いても再起動できなくなるという場合が有った。
The control device of the conventional air conditioner is configured as described above. During the cooling operation, when the cooling air is overloaded, such as when the outside air temperature is high, the temperature and pressure of the refrigerant are abnormal. When the operation of the protection device is detected due to a rise or the like, the operation of the air conditioner is stopped, and there has been a problem that the cooling effect cannot be achieved. Further, when the protection device is operated under an overload condition or the like, if the protection device is once stopped, it may not be possible to restart even if the bypass valve is opened.

【0006】この発明は上記のような問題を解消するた
めになされたもので、空気調和機が冷房運転時の過負荷
条件において頻繁に異常停止になるのを防止し、かつ冷
房運転時の過負荷条件での運転範囲拡大のできる空気調
和機の制御手段を提供することを目的とする。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it is possible to prevent an air conditioner from being frequently stopped abnormally under an overload condition during a cooling operation, and to prevent an overrun during a cooling operation. An object of the present invention is to provide a control unit of an air conditioner capable of expanding an operation range under a load condition.

【0007】[0007]

【課題を解決するための手段】この発明の係る空気調和
機においては、圧縮機、室外熱交換器、減圧手段及び室
内熱交換器を順次冷媒配管によって連結構成した冷凍サ
イクルと、上記圧縮機の冷媒吐出側から上記減圧手段と
上記室内熱交換器とを連結する冷媒配管に電磁弁を介し
て連結するバイパス配管と、上記室外熱交換器の温度又
は圧力を検出する検出手段とを設け、上記検知手段の出
力信号が冷房運転過負荷状態での上記室外熱交換器の温
度又は圧力に対応する所定値よりも低い値で上記電磁弁
を開放する制御手段を備えたものである。
In the air conditioner according to the present invention, a refrigeration cycle in which a compressor, an outdoor heat exchanger, a pressure reducing means, and an indoor heat exchanger are sequentially connected by a refrigerant pipe; A bypass pipe connected via a solenoid valve to a refrigerant pipe connecting the pressure reducing means and the indoor heat exchanger from the refrigerant discharge side, and a detecting means for detecting the temperature or pressure of the outdoor heat exchanger, Control means for opening the solenoid valve at a value lower than a predetermined value corresponding to the temperature or pressure of the outdoor heat exchanger when the output signal of the detecting means is in the cooling operation overload state.

【0008】[0008]

【作用】上記のように構成された空気調和機において
は、冷房運転時、冷媒の凝縮を行なう室外熱交換器の温
度または圧力が冷房過負荷状態における運転停止に至る
所定値より低い値に達した時点で、制御手段により電磁
弁を開き、室外熱交換器への冷媒流量を減少させて保護
装置が作動しないようにして空気調和機の運転を継続さ
せる。
In the air conditioner configured as described above, during the cooling operation, the temperature or pressure of the outdoor heat exchanger that condenses the refrigerant reaches a value lower than a predetermined value that causes the operation to stop in the cooling overload state. At this point, the electromagnetic valve is opened by the control means, the flow rate of the refrigerant to the outdoor heat exchanger is reduced, and the operation of the air conditioner is continued by preventing the protection device from operating.

【0009】[0009]

【実施例】以下、この発明の一実施例を図について説明
する。図1において、11は入力端子11aからの運転
指令入力ON,OFFに応じて動作する運転入力手段、
12はサーミスター又は圧力センサー13からの室外熱
交換器3の温度又は圧力値を検知する室外熱交換器3の
温度又は圧力検知手段、14は前記運転指令入力手段1
1からの出力信号及び室外熱交換器3の温度又は圧力検
知手段12からの出力信号に基づいて、圧縮機1、電磁
弁8などの電気機器の運転・停止及び異常発生時の自己
保持・点検モード、再起動制御を行なう制御手段であ
り、この制御手段14にはその指令出力により制御され
る圧縮機駆動手段1a、表示駆動手段15及び電磁弁駆
動手段8aが接続され、更に圧縮機駆動手段1aには圧
縮機1が接続され、電磁弁駆動手段8aには電磁弁8が
接続され、表示駆動手段15には異常表示のための表示
器16が接続されている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 11 denotes operation input means which operates in response to operation command input ON / OFF from an input terminal 11a;
12 is a temperature or pressure detecting means of the outdoor heat exchanger 3 for detecting a temperature or pressure value of the outdoor heat exchanger 3 from the thermistor or the pressure sensor 13, and 14 is the operation command input means 1.
1 based on the output signal from the compressor 1 and the output signal from the temperature or pressure detecting means 12 of the outdoor heat exchanger 3 to start / stop the electric equipment such as the compressor 1 and the solenoid valve 8 and to hold / check the self-maintenance when an abnormality occurs. The control means 14 controls a mode and a restart. The control means 14 is connected to a compressor drive means 1a, a display drive means 15 and a solenoid valve drive means 8a which are controlled by the command output. The compressor 1 is connected to 1a, the electromagnetic valve 8 is connected to the electromagnetic valve driving means 8a, and the display 16 for displaying an abnormality is connected to the display driving means 15.

【0010】図2は図1の実施例を示す冷凍サイクルの
構成図である。図2において1は冷媒を圧縮して吐き出
す圧縮機、2は圧縮機1への冷媒入路及び圧縮冷媒の送
出先を切り換える四方弁、3は室外熱交換器、4は減圧
装置、5は室内熱交換器である。そしてこれらは冷媒配
管によって順次接続されることにより、空気調和機の冷
媒回路を構成している。13は室外熱交換器3の近傍に
おける冷媒配管上に設置されて、係る冷媒配管の温度検
出手段としてのサーミスター又は圧力検出手段としての
圧力センサー、7は圧縮機1の吐出端から減圧装置4と
室内熱交換器5を連結する配管6部分に連結されたバイ
パス配管、8は前記バイパス配管7部分に配設された電
磁弁である。
FIG. 2 is a configuration diagram of a refrigeration cycle showing the embodiment of FIG. In FIG. 2, 1 is a compressor that compresses and discharges refrigerant, 2 is a four-way valve that switches the refrigerant inflow path to the compressor 1 and the destination of compressed refrigerant, 3 is an outdoor heat exchanger, 4 is a decompression device, and 5 is an indoor unit. It is a heat exchanger. These are sequentially connected by a refrigerant pipe to form a refrigerant circuit of the air conditioner. 13 is installed on the refrigerant pipe in the vicinity of the outdoor heat exchanger 3, and a thermistor as a temperature detecting means or a pressure sensor as a pressure detecting means of the refrigerant pipe, 7 is a pressure reducing device 4 from the discharge end of the compressor 1 A bypass pipe 8 connected to a pipe 6 connecting the heat exchanger 5 and the indoor heat exchanger 5 is an electromagnetic valve disposed in the bypass pipe 7.

【0011】以下、上記構成による空気調和機の動作を
説明する。冷房運転時において、圧縮機1と吐き出され
る高温高圧の冷媒ガスは、四方弁2を介して室外熱交換
器3に供給されることにより、室外空気と熱交換されて
高圧の液冷媒となる。次にこの高圧の液冷媒は、減圧装
置4を通過することにより減圧され、更に室内熱交換器
5を通る家庭において、室内空気と熱交換して冷房を行
うことにより蒸発して低圧の冷媒ガスとなる。そして、
この低圧の冷媒ガスは四方弁2を介して圧縮機1に吸入
されることにより、再び圧縮されて高温高圧の冷媒ガス
として吐き出されることにより冷凍サイクルを構成する
ことになる。
Hereinafter, the operation of the air conditioner having the above configuration will be described. During the cooling operation, the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 is supplied to the outdoor heat exchanger 3 via the four-way valve 2 so that heat is exchanged with outdoor air to become a high-pressure liquid refrigerant. Then this high-pressure liquid refrigerant, is more reduced pressure to pass through the pressure reducing device 4, further at home through the indoor heat exchanger 5, low-pressure refrigerant is evaporated by performing the cooling by exchanging heat with indoor air It becomes gas. And
The low-pressure refrigerant gas is sucked into the compressor 1 through the four-way valve 2 and is compressed again and discharged as a high-temperature and high-pressure refrigerant gas, thereby forming a refrigeration cycle.

【0012】ここで、冷房運転モード時入力端子11a
に運転ON指令が入力されると運転指令入力手段11か
らは運転ON指令信号が出力され、制御手段14に取り
込まれる。制御手段14では運転ON指令信号に応じ
て、圧縮機駆動手段1aに動作指令を出力し、これを動
作することにより電動圧縮機1に電源が供給され、上記
圧縮機1を運転することにより上記冷凍サイクルを構成
させ、空気調和機を運転させる。
Here, the cooling operation mode input terminal 11a
When an operation ON command is input to the control unit 14, an operation ON command signal is output from the operation command input unit 11 and is taken into the control unit 14. The control means 14 outputs an operation command to the compressor drive means 1a in accordance with the operation ON command signal, and by operating this, power is supplied to the electric compressor 1 and the compressor 1 is operated by operating the compressor 1 Construct a refrigeration cycle and operate the air conditioner.

【0013】かかる、冷房運転状態においてサーミスタ
ー又は圧力センサー13による室外熱交換器3の温度又
は圧力を室外熱交換器温度又は圧力検知手段12により
検知し、出力信号を制御手段14に送出する。制御手段
14は室外熱交換器3の温度又は圧力が冷房運転が停止
する第1の所定値より低い第2の所定値に達すると、電
磁弁駆動手段8aに出力して電磁弁8を開放させる。
In such a cooling operation state, the temperature or pressure of the outdoor heat exchanger 3 by the thermistor or pressure sensor 13 is detected by the outdoor heat exchanger temperature or pressure detecting means 12, and an output signal is sent to the control means 14. When the temperature or pressure of the outdoor heat exchanger 3 reaches a second predetermined value lower than the first predetermined value at which the cooling operation is stopped, the control unit 14 outputs to the electromagnetic valve driving unit 8a to open the electromagnetic valve 8. .

【0014】ここで電磁弁8が開放されると、圧縮機1
から吐き出された高温高圧の冷媒ガスの一部がバイパス
配管7を通って減圧装置4により減圧された低圧の冷媒
ガス側へ分配され、室外熱交換器3に流れる冷媒流量が
減少するため室外熱交換器3の温度又は圧力は減少す
る。したがって、冷房運転時、過負荷条件において空気
調和機を異常停止することがない。
When the solenoid valve 8 is opened, the compressor 1
A part of the high-temperature and high-pressure refrigerant gas discharged from the refrigerant is distributed to the low-pressure refrigerant gas side depressurized by the decompression device 4 through the bypass pipe 7, and the flow rate of the refrigerant flowing to the outdoor heat exchanger 3 is reduced, so that the outdoor heat The temperature or pressure of the exchanger 3 decreases. Therefore, during the cooling operation, the air conditioner does not abnormally stop under the overload condition.

【0015】次に図に示すフローチャートに基づいて
空気調和機の動作について説明する。まず、ステップ3
1において冷房運転モードとする。次のステップ32に
おいて、制御手段により電磁弁駆動手段8aに出力信号
を送り電磁弁8を閉とする。次のステップ33において
入力端子11aから運転指令が入力されているか否かを
判定する。ここで運転指令信号がOFFであればステッ
プ42に進み、圧縮機1を停止させ、ステップ43停止
モードに進む。また、運転指令信号がONであればステ
ップ34に進み、制御手段から圧縮機1に電源が供給さ
れ、圧縮機1が駆動することにより空気調和機の運転が
開始される。そして次のステップ35に進む。ステップ
35ではサーミスター又は圧力センサー13によって、
室外熱交換器3の温度又は圧力を温度又は圧力検知手段
12により検知し、出力信号を制御手段に送付しステッ
プ46に進む。次のステップ46では制御手段において
室外熱交換器の温度T又は圧力値Pと、所定温度T1
又は所定圧力P1 とを比較し、T>T1 又はP>P1
あるか否かの判定を行う。そして、このステップ46に
おける判定がNoである場合はステップ33にもどる。
また、ステップ46における判定がYesである場合は
ステップ47に進む。次のステップ47では制御手段1
4により、電磁弁駆動手段8aに出力して電磁弁8を開
とし次のステップ48に進む。ステップ48ではサーミ
スター又は圧力センサー13によって室外熱交換器3の
温度又は圧力を温度又は圧力検知手段12により検知
し、出力信号を制御手段14に送付しステップ49に進
む。次のステップ49では制御手段14において室外熱
交換器の温度T又は圧力値Pと、所定温度T0 又は所
定圧力P0 とを比較し、T>T0 又はP>P0 であるか
否かの判定を行う。
[0015] Next the operation of the air conditioner based on the flowchart shown in FIG. First, step 3
In step 1, the cooling operation mode is set. In the next step 32, the control unit sends an output signal to the solenoid valve driving unit 8a to close the solenoid valve 8. In the next step 33, it is determined whether or not an operation command has been input from the input terminal 11a. If the operation command signal is OFF, the process proceeds to step 42, in which the compressor 1 is stopped, and the process proceeds to step 43 stop mode. If the operation command signal is ON, the routine proceeds to step 34, where power is supplied from the control means to the compressor 1, and the compressor 1 is driven to start the operation of the air conditioner. Then, the process proceeds to the next step 35 . Steps
At 35 , by the thermistor or pressure sensor 13 ,
Temperature or pressure detecting means for detecting the temperature or pressure of the outdoor heat exchanger 3
Then , the output signal is sent to the control means, and the flow advances to step 46. In the next step 46, the control means controls the temperature T or the pressure value P of the outdoor heat exchanger 3 and the predetermined temperature T 1.
Alternatively, it is compared with a predetermined pressure P 1 to determine whether T> T 1 or P> P 1 . If the determination in step 46 is No, the process returns to step 33.
If the determination in step 46 is Yes, the process proceeds to step 47. In the next step 47, the control means 1
In step 4, the output is output to the solenoid valve driving means 8a to open the solenoid valve 8, and the flow advances to the next step 48. In step 48, the temperature or pressure of the outdoor heat exchanger 3 is detected by the temperature or pressure detecting means 12 by the thermistor or the pressure sensor 13, and an output signal is sent to the control means 14 , and the process proceeds to step 49. And the temperature T or the pressure value P of the outdoor heat exchanger 3 in the next step 49 the control unit 14 compares the predetermined temperature T 0 or the predetermined pressure P 0, T> or a T 0 or P> P 0 not Is determined.

【0016】このステップ49における判定がYesで
ある場合は、保護装置作動と判定しステップ52に進
む。次のステップ52では制御手段14により圧縮機駆
動手段1aに停止指令を出力して、圧縮機1の運転を停
止させステップ53に進む。ステップ53では制御手段
14により異常表示駆動手段15に出力し、表示器16
を点灯し異常表示を行い、次のステップ54点灯モード
に進む。また、ステップ49における判定がNoである
場合にはステップ55に進む。ステップ55ではサーミ
スター又は圧力センサー13によって室外熱交換器
温度又は圧力を温度又は圧力検知手段12により検知
し、出力信号を制御手段14に送付しステップ50に進
む。次のステップ50では制御手段14において室外熱
交換器の温度T又は圧力値Pと、所定温度T2 又は所
定圧力P2 とを比較し、T≦T2 又はP≦P2 であるか
否かの判定を行う。そしてこのステップ50における判
定がNoである場合にはステップ47にもどる。また、
ステップ50における判定がYesである場合はステッ
プ51に進む。次のステップ51では制御手段14によ
り電磁弁駆動手段8aに出力信号を送り電磁弁8を閉と
しステップ33にもどる。
If the determination in step 49 is Yes, it is determined that the protection device is activated, and the routine proceeds to step 52. In the next step 52, the control means 14 outputs a stop command to the compressor driving means 1a to stop the operation of the compressor 1 and proceeds to step 53. In step 53, the control means 14 outputs the signal to the abnormality display drive means 15, and the display 16
Is turned on to display an abnormality, and the process proceeds to the next step 54 lighting mode. If the determination in step 49 is No, the process proceeds to step 55. In step 55, the temperature or pressure of the outdoor heat exchanger 3 is detected by the temperature or pressure detecting means 12 by the thermistor or the pressure sensor 13, and an output signal is sent to the control means 14. It compares the temperature T or the pressure value P of the outdoor heat exchanger 3 in the next step 50 the control unit 14, and a predetermined temperature T 2 or a predetermined pressure P 2, whether it is T ≦ T 2 or P ≦ P 2 whether Is determined. If the determination in step 50 is No, the process returns to step 47. Also,
If the determination in step 50 is Yes, the process proceeds to step 51. In the next step 51, the control means 14 sends an output signal to the solenoid valve driving means 8a to close the solenoid valve 8 and returns to step 33.

【0017】従って、冷房運転時、保護装置作動条件
(運転条件)により保護装置を作動させ異常停止させる
ことなく、空気調和機を運転させることができるので、
過負荷条件において運転範囲を拡大させる効果がある。
Therefore, during the cooling operation, the air conditioner can be operated without activating the protection device and stopping abnormally according to the protection device operating condition (operating condition).
This has the effect of expanding the operating range under overload conditions.

【0018】この発明は以上説明したように構成されて
いるから、外気温度等が高くなり冷媒の温度、圧力が上
昇しようとしても、電磁弁が開かれて高温、高圧冷媒が
低圧側へバイパスされ、常に冷媒が所定の温度、圧力以
下に維持されるため、冷媒の温度、圧力上昇に起因して
発生する圧力機軸受等の事故を防止しうるとともに、特
に過負荷条件においても運転を継続し、使い勝手が良く
信頼性の高い空気調和機が得られる。
Since the present invention is configured as described above, even if the outside air temperature rises and the temperature and pressure of the refrigerant increase, the solenoid valve is opened and the high temperature and high pressure refrigerant are bypassed to the low pressure side. Since the refrigerant is always maintained at a predetermined temperature and pressure or lower, it is possible to prevent an accident such as a pressure machine bearing caused by a rise in the temperature and pressure of the refrigerant, and to continue the operation even in an overload condition. Thus, an air conditioner that is easy to use and highly reliable can be obtained.

【図面の簡単な説明】[Brief description of the drawings]

【図1】この発明に関る空気調和機の制御装置の構成を
示す原理ブロック図である。
FIG. 1 is a principle block diagram showing a configuration of a control device for an air conditioner according to the present invention.

【図2】この発明の実施例を示す冷凍サイクル構成図で
ある。
FIG. 2 is a configuration diagram of a refrigeration cycle showing an embodiment of the present invention.

【図3】この発明の実施例2の動作を示すフローチャー
トである。
FIG. 3 is a flowchart showing the operation of the second embodiment of the present invention.

【図4】従来の空気調和機の実施例を示す冷凍サイクル
構成図である。
FIG. 4 is a refrigeration cycle configuration diagram showing an example of a conventional air conditioner.

【符号の説明】[Explanation of symbols]

1 圧縮機 3 室外熱交換器 4 減圧手段 7 バイパス配管 8 電磁弁 14 制御手段 DESCRIPTION OF SYMBOLS 1 Compressor 3 Outdoor heat exchanger 4 Decompression means 7 Bypass piping 8 Solenoid valve 14 Control means

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 圧縮機、室外熱交換器、減圧手段及び室
内熱交換器を順次冷媒配管によって連結構成した冷凍サ
イクルと、上記圧縮機の吐出側と上記室内熱交換器の吸
入側とを電磁弁を介して連結するバイパス配管と、上記
室外熱交換器の温度又は圧力を検知する検知手段と、上
記検知手段の出力信号により電磁弁の開閉を制御する制
御手段とを備え、上記制御手段は上記検知手段の出力信
号が冷房運転過負荷状態での上記室外熱交換器の温度又
は圧力に対応する所定値よりも低い値で上記電磁弁を開
放するようにしたことを特徴とする空気調和機。
1. A refrigeration cycle in which a compressor, an outdoor heat exchanger, a pressure reducing means, and an indoor heat exchanger are sequentially connected by refrigerant pipes, and a discharge side of the compressor and suction of the indoor heat exchanger.
A bypass pipe connecting the inlet side via a solenoid valve,
Detecting means for detecting the temperature or pressure of the outdoor heat exchanger;
Control the opening and closing of the solenoid valve by the output signal of the detection means.
Control means, wherein the control means outputs the output signal of the detection means.
Is the temperature of the outdoor heat exchanger when the cooling operation is overloaded.
Opens the solenoid valve at a value lower than the specified value corresponding to the pressure.
An air conditioner characterized by being adapted to release.
JP4065890A 1992-03-24 1992-03-24 Air conditioner Expired - Lifetime JP2882172B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4065890A JP2882172B2 (en) 1992-03-24 1992-03-24 Air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4065890A JP2882172B2 (en) 1992-03-24 1992-03-24 Air conditioner

Publications (2)

Publication Number Publication Date
JPH05264107A JPH05264107A (en) 1993-10-12
JP2882172B2 true JP2882172B2 (en) 1999-04-12

Family

ID=13300017

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4065890A Expired - Lifetime JP2882172B2 (en) 1992-03-24 1992-03-24 Air conditioner

Country Status (1)

Country Link
JP (1) JP2882172B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104456968B (en) * 2014-11-06 2017-08-15 广东芬尼克兹节能设备有限公司 A kind of intelligent blower fan unloading regulation and control method
CN104791960B (en) * 2015-04-30 2018-02-06 广东美的制冷设备有限公司 A kind of air conditioner unloading control system and method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS602778U (en) * 1983-06-20 1985-01-10 エスエムシ−株式会社 Cooling device capacity control system

Also Published As

Publication number Publication date
JPH05264107A (en) 1993-10-12

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