JP3613862B2 - Air conditioner - Google Patents

Air conditioner Download PDF

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Publication number
JP3613862B2
JP3613862B2 JP32990495A JP32990495A JP3613862B2 JP 3613862 B2 JP3613862 B2 JP 3613862B2 JP 32990495 A JP32990495 A JP 32990495A JP 32990495 A JP32990495 A JP 32990495A JP 3613862 B2 JP3613862 B2 JP 3613862B2
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JP
Japan
Prior art keywords
temperature
compressor
temperature difference
set value
indoor
Prior art date
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Expired - Fee Related
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JP32990495A
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Japanese (ja)
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JPH09145125A (en
Inventor
雅浩 馬場
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.)
Panasonic Corp
Panasonic Holdings Corp
Original Assignee
Panasonic Corp
Matsushita Electric Industrial Co Ltd
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
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Priority to JP32990495A priority Critical patent/JP3613862B2/en
Publication of JPH09145125A publication Critical patent/JPH09145125A/en
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Abstract

PROBLEM TO BE SOLVED: To prevent an abnormal increasing in temperature of a coil in a compressor in advance and further to prevent the compressor from being damaged by a method wherein an operation of the compressor is stopped in the case that the compressor has caused an inverse rotation due to a power failure. SOLUTION: In the case that an operating time of a compressor elapses a set value of operating time and a temperature difference between an indoor air temperature and an indoor pipe temperature is less than a temperature difference set value at a step 115, the elapsing time at that state is detected by a time counter at a step 117 and if the elapsing time is more than a set value of the temperature difference time at a step 118, the compressor is stopped at a step 119.

Description

【０００１】
【発明の属する技術分野】
本発明は空気調和装置において、圧縮機の破損を防止する技術に関するものである。
【０００２】
【従来の技術】
従来の空気調和装置では、供給電源が瞬間停電を起こした際に圧縮機が逆転を起こす場合があり、圧縮機は逆転した状態で運転を続けることがあった。
【０００３】
【発明が解決しようとする課題】
しかしながら上記の従来の空気調和装置では、圧縮機が逆転した状態で運転を続けた場合、圧縮機のコイル温度が異常に上昇し、破損するという問題点があった。
【０００４】
本発明は上記従来例の問題を解決することを課題とするものである。
【０００５】
【課題を解決するための手段】
上記の問題点を解決するために本発明は、圧縮機が逆転を起こした場合、その状態を検知し、圧縮機を停止する制御手段を設けたものである。そして圧縮機の逆転継続を停止することができる。
【０００６】
【発明の実施の形態】
本発明は、圧縮機が逆転を起こした場合、その状態を検知して圧縮機を停止するものであり、これにより圧縮機の逆転による破損を防止するものである。
【０００７】
そして、圧縮機の逆転を検知する手段は、室内温度検出手段による温度と、室内配管温度検出手段による温度との温度差によって逆転状態を検知することができる。
【０００８】
従って、従来の空気調和装置に使用されている部品のみで検知が可能であり、逆転の状態を迅速に検知することができて、その逆転を停止することができる。
【０００９】
また、空気調和装置の運転開始より、ある一定時間は室内温度と室内配管温度の温度差が設定値を下回るが、その間は圧縮機を停止させないことにすることにより、制御の誤動作を防止する。
【００１０】
また、空気調和装置の運転条件の変化時に室内温度と室内配管温度の温度差が一時的に設定値を下回るが、温度差が設定値を下回る状態が一定時間継続した場合、圧縮機を停止することとすることにより、制御が誤動作することを防止する。
【００１１】
以上の本発明の作用により本発明の実施が可能であるが、以下に具体的な実施例について説明する。
【００１２】
【実施例】
以下、本発明による空気調和装置の一実施例を図面と共に説明する。
【００１３】
図５は空気調和装置の冷凍サイクルで、圧縮機２０１から吐出された冷媒は四方弁２０２，凝縮器２０３，キャピラリーチューブ２０４，蒸発機２０５と流れ圧縮機２０１に吸入される。２０６は室内温度検出手段、２０７は室内配管温度検出手段で構成される。
【００１４】
（実施例１）
図１において、制御系に取り入れられる情報は、室内温度，室内配管温度である。
【００１５】
まず、運転時間判定回路１で積算運転時間と運転時間設定値２を比較し、積算運転時間が運転時間設定値２以上であれば、室内温度，室内配管温度の情報を室内温度検出手段３，室内配管温度検出手段４から制御系に取り入れ、温度差演算手段５にて室内温度検出手段３と、室内配管温度検出手段４より得た室内温度，室内配管温度の温度差を演算し、温度差比較手段６により温度差設定値７と比較し、温度差設定値７以下であれば、圧縮機停止手段８により圧縮機９を停止させる。
【００１６】
この制御の流れをフローチャートにしたものが図２である。
ステップ１０１で運転時間Ｔを検知し、そしてステップ１０２で運転時間Ｔと運転時間設定値Ｔｓの関係がＴ≧Ｔｓに成り立てば、ステップ１０３で室内温度ｔ１を読み込み、ステップ１０４で室内配管温度ｔ２を読み込む。そしてステップ１０５でｔ１，ｔ２の温度差ｔを演算し、ステップ１０６で温度差ｔと温度差設定値ｔｓとの関係がｔ≦ｔｓに成り立てば、ステップ１０７で圧縮機を停止させる。
【００１７】
（実施例２）
図３において、制御系に取り入れられる情報は、室内温度，室内配管温度である。
【００１８】
まず、運転時間判定回路１１で積算運転時間と運転時間設定値１２を比較し、積算運転時間が運転時間設定値１２以上であれば、室内温度，室内配管温度の情報を室内温度検出手段１３，室内配管温度検出手段１４から制御系に取り入れ、温度差演算手段１５にて室内温度検出手段１３と、室内配管温度検出手段１４より得た室内温度，室内配管温度の温度差を演算し、温度差比較手段１６により温度差設定値１７と比較し、温度差設定値１７以下であれば、時間カウンタ１８により、上記の温度差が温度差設定値１７以下である状態の経過時間を検知し、経過時間比較手段１９により、その経過時間と経過時間設定値２０を比較し、経過時間が経過時間設定値２０以上経過すれば、圧縮機停止手段２１により圧縮機２２を停止させる。
【００１９】
この制御の流れをフローチャートにしたものが図４である。
ステップ１１１で運転時間Ｔを検知し、そして運転時間Ｔと運転時間設定値Ｔｓの関係がステップ１１２でＴ≧Ｔｓに成り立てば、ステップ１１３で室内温度ｔ１を読み込み、ステップ１１４で室内配管温度ｔ２を読み込む。そしてステップ１１５でｔ１，ｔ２の温度差ｔを演算し、温度差ｔと温度差設定値ｔｓとの関係がステップ１１６でｔ≧ｔｓに成り立てば、時間カウンタ１８にて上記ｔ≧ｔｓ状態の経過時間Ｔａをステップ１１７で検知し、そのＴａと温度差時間設定値Ｔｃの関係がステップ１１８でＴａ≧Ｔｃに成り立てば、ステップ１１９で圧縮機を停止させる。
【００２０】
【発明の効果】
本発明は、圧縮機の逆転状態を検知し、圧縮機を停止することにより、圧縮機のコイルの異常な温度上昇を防止し圧縮機の破壊を防止することができる。
【００２１】
また、圧縮機が逆転を起こした場合、室内温度と室内配管温度の温度差によってその状態を検知することにより、従来の空気調和装置に使用されている部品のみで検知可能であり、新たにコストをかけることなくこの制御が可能であり、また逆転の状態を迅速に検知することが可能である。
【００２２】
また、空気調和装置の運転開始よりある一定時間は、室内温度と室内配管温度の温度差が設定値を下回るが、その間は圧縮機を停止させないことにより制御が誤動作することが防止可能である。
【００２３】
また、空気調和装置の運転条件の変化時に室内温度と室内配管温度の温度差が一時的に設定値を下回るが、温度差が設定値を下回る状態が一定時間継続した場合、圧縮機を停止させることにより制御が誤動作することが防止可能で、逆転による圧縮機の破壊を防止することができる。
【図面の簡単な説明】
【図１】本発明の実施例１における圧縮機の逆転防止制御のブロック図
【図２】同圧縮機の逆転防止制御のフローチャート
【図３】本発明の実施例２における圧縮機の逆転防止制御のブロック図
【図４】同圧縮機の逆転防止制御のフローチャート
【図５】本発明における空気調和装置の冷凍サイクル説明図
【符号の説明】
１，１１ 運転時間判定回路
２，１２ 運転時間設定値
３，１３ 室内温度検出手段
４，１４ 室内配管温度検出手段
５，１５ 温度差演算手段
６，１６ 温度差比較手段
７，１７ 温度差設定値
８，２１ 圧縮機停止手段
９，２２ 圧縮機
１８ 時間カウンタ
１９ 経過時間比較手段
２０ 経過時間設定値[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a technique for preventing breakage of a compressor in an air conditioner.
[0002]
[Prior art]
In a conventional air conditioner, the compressor may reverse when the supply power supply causes a momentary power failure, and the compressor may continue to operate in the reverse state.
[0003]
[Problems to be solved by the invention]
However, in the conventional air conditioner described above, when the operation is continued with the compressor reversed, the coil temperature of the compressor rises abnormally and breaks.
[0004]
An object of the present invention is to solve the problems of the conventional example.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention is provided with a control means for detecting the state of the compressor when the compressor reverses and stopping the compressor. And the reverse rotation continuation of the compressor can be stopped.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, when the compressor is reversely rotated, the state is detected and the compressor is stopped, thereby preventing the compressor from being damaged due to the reverse rotation.
[0007]
The means for detecting the reverse rotation of the compressor can detect the reverse rotation state based on the temperature difference between the temperature by the indoor temperature detection means and the temperature by the indoor pipe temperature detection means.
[0008]
Therefore, it is possible to detect only with the components used in the conventional air conditioner, and it is possible to quickly detect the reverse rotation state and to stop the reverse rotation.
[0009]
Further, since the temperature difference between the room temperature and the room piping temperature is lower than the set value for a certain period from the start of the operation of the air conditioner, the malfunction of the control is prevented by not stopping the compressor during that period.
[0010]
Also, when the operating condition of the air conditioner changes, the temperature difference between the room temperature and the room piping temperature temporarily falls below the set value, but the compressor is stopped if the temperature difference remains below the set value for a certain period of time. By doing so, the control is prevented from malfunctioning.
[0011]
Although the present invention can be implemented by the operation of the present invention described above, specific examples will be described below.
[0012]
【Example】
Hereinafter, an embodiment of an air conditioner according to the present invention will be described with reference to the drawings.
[0013]
FIG. 5 shows a refrigeration cycle of the air conditioner. The refrigerant discharged from the compressor 201 is sucked into the four-way valve 202, the condenser 203, the capillary tube 204, the evaporator 205 and the flow compressor 201. Reference numeral 206 denotes indoor temperature detection means, and reference numeral 207 denotes indoor pipe temperature detection means.
[0014]
Example 1
In FIG. 1, the information taken into the control system is the room temperature and the room piping temperature.
[0015]
First, the operation time determination circuit 1 compares the accumulated operation time with the operation time set value 2, and if the accumulated operation time is equal to or greater than the operation time set value 2, information on the room temperature and the indoor pipe temperature is obtained from the room temperature detecting means 3, The temperature difference between the indoor temperature detection means 3 and the indoor pipe temperature detected by the indoor pipe temperature detection means 4 is calculated by the temperature difference calculation means 5 from the indoor pipe temperature detection means 4 into the control system. The comparison means 6 compares with the temperature difference set value 7 and if the temperature difference set value 7 or less, the compressor stop means 8 stops the compressor 9.
[0016]
FIG. 2 is a flowchart showing this control flow.
If the operation time T is detected in step 101 and the relationship between the operation time T and the operation time set value Ts is established as T ≧ Ts in step 102, the indoor temperature t1 is read in step 103, and the indoor piping temperature t2 is determined in step 104. Read. Then, in step 105, the temperature difference t between t1 and t2 is calculated. In step 106, if the relationship between the temperature difference t and the temperature difference set value ts satisfies t ≦ ts, the compressor is stopped in step 107.
[0017]
(Example 2)
In FIG. 3, the information taken into the control system is the room temperature and the room piping temperature.
[0018]
First, the operation time determination circuit 11 compares the accumulated operation time with the operation time set value 12, and if the accumulated operation time is equal to or greater than the operation time set value 12, information on the room temperature and the indoor pipe temperature is obtained from the room temperature detecting means 13, The temperature difference between the indoor temperature and the indoor pipe temperature obtained from the indoor temperature detecting means 13 and the indoor pipe temperature detecting means 14 is calculated by the temperature difference calculating means 15 from the indoor pipe temperature detecting means 14 into the control system. The comparison means 16 compares with the temperature difference set value 17 and if the temperature difference set value is 17 or less, the time counter 18 detects the elapsed time when the temperature difference is less than the temperature difference set value 17 and The elapsed time is compared with the elapsed time set value 20 by the time comparison means 19, and if the elapsed time exceeds the elapsed time set value 20, the compressor 22 is stopped by the compressor stop means 21.
[0019]
FIG. 4 is a flowchart showing this control flow.
If the operation time T is detected in step 111 and the relationship between the operation time T and the operation time set value Ts is established as T ≧ Ts in step 112, the indoor temperature t1 is read in step 113, and the indoor piping temperature t2 is determined in step 114. Read. Then, in step 115, the temperature difference t between t1 and t2 is calculated, and if the relationship between the temperature difference t and the temperature difference set value ts satisfies t ≧ ts in step 116, the time counter 18 passes the above t ≧ ts state. The time Ta is detected in step 117, and if the relationship between the Ta and the temperature difference time set value Tc is established in step 118 as Ta ≧ Tc, the compressor is stopped in step 119.
[0020]
【The invention's effect】
The present invention detects the reverse rotation state of the compressor and stops the compressor, thereby preventing an abnormal temperature rise of the coil of the compressor and preventing the compressor from being destroyed.
[0021]
In addition, when the compressor reverses, it can be detected only by the parts used in the conventional air conditioner by detecting the state based on the temperature difference between the indoor temperature and the indoor piping temperature, and a new cost It is possible to perform this control without applying an error, and it is possible to quickly detect the reverse rotation state.
[0022]
Further, although the temperature difference between the room temperature and the room piping temperature is lower than the set value for a certain period of time after the start of the operation of the air conditioner, it is possible to prevent the control from malfunctioning by not stopping the compressor during that time.
[0023]
Also, when the operating condition of the air conditioner changes, the temperature difference between the room temperature and the indoor piping temperature temporarily falls below the set value, but the compressor is stopped if the temperature difference remains below the set value for a certain period of time. Therefore, it is possible to prevent the control from malfunctioning, and it is possible to prevent the compressor from being damaged due to the reverse rotation.
[Brief description of the drawings]
FIG. 1 is a block diagram of a compressor reverse rotation prevention control according to a first embodiment of the present invention. FIG. 2 is a flowchart of a compressor reverse rotation prevention control according to the first embodiment of the present invention. FIG. 4 is a flowchart of reverse rotation prevention control of the compressor. FIG. 5 is an explanatory diagram of a refrigeration cycle of an air conditioner according to the present invention.
1,11 Operating time determination circuit 2,12 Operating time set value 3,13 Indoor temperature detecting means 4,14 Indoor piping temperature detecting means 5,15 Temperature difference calculating means 6,16 Temperature difference comparing means 7,17 Temperature difference setting value 8, 21 Compressor stop means 9, 22 Compressor 18 Time counter 19 Elapsed time comparison means 20 Elapsed time set value

Claims (3)

圧縮機と、凝縮器と、蒸発機とを有して冷暖房可能な空気調和装置において、室内温度を検出する室内温度検出手段と、室内配管温度を検出する室内配管温度検出手段と、前記室内温度検出手段が検出する室内温度と前記室内配管温度検出手段が検出する室内配管温度との温度差を演算する演算手段と、前記温度差を所定の温度差設定値と比較すると共に、前記温度差が前記温度差設定値以下の時に前記圧縮機を停止させる制御手段とを備えたことを特徴とする空気調和装置。 In an air conditioner having a compressor, a condenser, and an evaporator and capable of cooling and heating, an indoor temperature detecting means for detecting an indoor temperature, an indoor pipe temperature detecting means for detecting an indoor pipe temperature, and the indoor temperature A calculating means for calculating a temperature difference between the indoor temperature detected by the detecting means and the indoor pipe temperature detected by the indoor pipe temperature detecting means; and comparing the temperature difference with a predetermined temperature difference set value; An air conditioner comprising: control means for stopping the compressor when the temperature difference is equal to or less than a set value . 制御手段は、空気調和装置の運転開始からの運転時間を検知し、その検知された運転時間が所定の運転時間内の時には、圧縮機を停止させないように制御することを特徴とする請求項１記載の空気調和装置。 The control means detects an operation time from the start of operation of the air conditioner, and performs control so that the compressor is not stopped when the detected operation time is within a predetermined operation time. The air conditioning apparatus described. 制御手段は、温度差が温度差設定値以下の時に、前記温度差が前記温度差設定値以下である状態の経過時間を検知し、前記経過時間が所定の経過時間設定値以上の時に圧縮機を停止させるように制御することを特徴とする請求項１記載の空気調和装置。 The control means detects an elapsed time when the temperature difference is not more than the temperature difference set value when the temperature difference is not more than the temperature difference set value, and when the elapsed time is not less than a predetermined elapsed time set value, the compressor The air conditioner according to claim 1, wherein the air conditioner is controlled so as to be stopped .
JP32990495A 1995-11-24 1995-11-24 Air conditioner Expired - Fee Related JP3613862B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32990495A JP3613862B2 (en) 1995-11-24 1995-11-24 Air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32990495A JP3613862B2 (en) 1995-11-24 1995-11-24 Air conditioner

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JPH09145125A JPH09145125A (en) 1997-06-06
JP3613862B2 true JP3613862B2 (en) 2005-01-26

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KR100540423B1 (en) * 1999-10-16 2006-01-10 주식회사 엘지이아이 Inverter air conditioner compressor frequency control method
JP4844147B2 (en) * 2006-02-08 2011-12-28 パナソニック株式会社 Air conditioner

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JPS5824285B2 (en) * 1979-11-16 1983-05-20 サンデン株式会社 Car cooler control device
JPS61124851U (en) * 1985-01-23 1986-08-06
JPS62245042A (en) * 1986-04-18 1987-10-26 Mitsubishi Electric Corp Protection device for air conditioner
JP3132922B2 (en) * 1992-10-06 2001-02-05 三菱重工業株式会社 Refrigeration unit control device
JPH07218059A (en) * 1994-02-02 1995-08-18 Hitachi Ltd Air conditioner provided with reverse rotation-preventing function

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