JP2006292239A - Air conditioner - Google Patents

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Publication number
JP2006292239A
JP2006292239A JP2005112001A JP2005112001A JP2006292239A JP 2006292239 A JP2006292239 A JP 2006292239A JP 2005112001 A JP2005112001 A JP 2005112001A JP 2005112001 A JP2005112001 A JP 2005112001A JP 2006292239 A JP2006292239 A JP 2006292239A
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heater
circuit
drive circuit
compressor
function
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Japanese (ja)
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Yoshiaki Iwayama
善昭 岩山
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Priority to JP2005112001A priority Critical patent/JP2006292239A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner capable of detecting the wire breakage of a heater circuit in a short time. <P>SOLUTION: This air conditioner has: a compressor 1 compressing a refrigerant; a compressor drive circuit 2 driving the compressor; a heater 3 generating heat by current carrying; a heater drive circuit 4 driving the heater; an AC power source 6; a current detection circuit 7 detecting a current supplied from the AC power source; and a microcomputer 8 having a function detecting a current signal that is an output of the current detection circuit, a function turning on/off the compressor drive circuit, and a function turning on/off the heater drive circuit. The current signal before turning on the heater drive circuit and the current signal after turning on the heater drive circuit are compared in the on-state of the compressor drive circuit, and it can be decided that the heater has the wire breakage or that the heater drive circuit fails when a difference thereof is shorten than a prescribed value. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、ヒータ回路の断線検知機能を有する空気調和機に関するものである。   The present invention relates to an air conditioner having a function of detecting disconnection of a heater circuit.

従来、この種のヒータ断線機能を有する空気調和機では、ヒータ温度を検出して、ヒータオン動作後のある設定された時間経過後に測定したヒータ温度に対して、ヒータの断線検知を実現している（例えば、特許文献１参照）。   Conventionally, in an air conditioner having this type of heater disconnection function, the heater temperature is detected, and the heater disconnection detection is realized with respect to the heater temperature measured after a set time has elapsed after the heater ON operation. (For example, refer to Patent Document 1).

図４は、特許文献１に記載された従来のヒータ断線機能を有する空気調和機を示すものである。図４に示すように、温度設定機能９と、ヒータ温度検出機能１０と、学習機能１１と、診断機能１２から構成されている。
特開平７−１８０８８２号公報 FIG. 4 shows an air conditioner having a conventional heater disconnection function described in Patent Document 1. In FIG. As shown in FIG. 4, the temperature setting function 9, the heater temperature detection function 10, the learning function 11, and the diagnosis function 12 are configured.
Japanese Patent Laid-Open No. 7-180882

しかしながら、前記従来の構成では、ヒータオン動作後、ヒータ温度検出機能１０で検出されたヒータ温度が温度設定機能９に設定された温度に上昇するまでヒータの断線が検知できないので、ヒータの断線検知に数分かかるという課題を有していた。   However, in the conventional configuration, after the heater is turned on, the heater disconnection cannot be detected until the heater temperature detected by the heater temperature detection function 10 rises to the temperature set in the temperature setting function 9. Had the task of taking a few minutes.

本発明は、前記従来の課題を解決するもので、ヒータ回路の断線を短時間で検出可能な空気調和機を提供することを目的とする。   The present invention solves the above-described conventional problems, and an object thereof is to provide an air conditioner capable of detecting a disconnection of a heater circuit in a short time.

前記従来の課題を解決するために、本発明の空気調和機は、冷媒を圧縮する圧縮機と、前記圧縮機を駆動する圧縮機駆動回路と、通電により発熱するヒータと、前記ヒータを駆動するヒータ駆動回路と、交流電源と、前記交流電源から供給される電流を検出する電流検出回路と、前記電流検出回路の出力である電流信号を検出する機能及び前記圧縮機駆動回路をオン／オフする機能及び前記ヒータ駆動回路をオン／オフする機能を有するマイクロコンピュータからなり、前記圧縮機駆動回路がオン状態において、前記ヒータ駆動回路をオンする前の電流信号とオンした後の電流信号を比較し、その差が一定値以上なければ、前記ヒータの断線もしくは前記ヒータ駆動回路の故障と判断することを可能としたものである。   In order to solve the conventional problems, an air conditioner of the present invention drives a compressor that compresses a refrigerant, a compressor drive circuit that drives the compressor, a heater that generates heat when energized, and the heater. A heater drive circuit, an AC power supply, a current detection circuit that detects a current supplied from the AC power supply, a function that detects a current signal that is an output of the current detection circuit, and the compressor drive circuit are turned on / off. And a microcomputer having a function of turning on / off the heater driving circuit, and comparing the current signal before turning on the heater driving circuit with the current signal after turning on the heater driving circuit when the compressor driving circuit is on. If the difference is not greater than a certain value, it is possible to determine that the heater is disconnected or that the heater drive circuit is faulty.

これによって、圧縮機駆動回路がオンした状態で、ヒータ駆動回路をオンした後、数秒以内でヒータの断線もしくはヒータ駆動回路の故障（ヒータとヒータ駆動回路を合わせてヒータ回路と呼ぶ）を判断することが可能となる。   Thus, after the heater drive circuit is turned on while the compressor drive circuit is turned on, the heater breakage or the heater drive circuit failure (the heater and the heater drive circuit are collectively referred to as the heater circuit) is determined within a few seconds. It becomes possible.

また、本発明の空気調和機は、冷媒を圧縮する圧縮機と、前記圧縮機を駆動する圧縮機駆動回路と、通電により発熱するヒータと、前記ヒータを駆動するヒータ駆動回路と、交流電源と、前記交流電源から供給される電流を検出する電流検出回路と、前記電流検出回路の出力である電流信号を検出する機能及び前記圧縮機駆動回路をオン／オフする機能及び前記ヒータ駆動回路をオン／オフする機能を有するマイクロコンピュータからなり、前記圧縮機駆動回路がオフ状態において、前記ヒータ駆動回路をオンする前の電流信号とオンした後の電流信号を比較し、その差が一定値以上なければ、前記ヒータの断線もしくは前記ヒータ駆動回路の故障と判断することを可能としたものである。   An air conditioner of the present invention includes a compressor that compresses a refrigerant, a compressor drive circuit that drives the compressor, a heater that generates heat when energized, a heater drive circuit that drives the heater, and an AC power source. A current detection circuit for detecting a current supplied from the AC power supply, a function for detecting a current signal output from the current detection circuit, a function for turning on / off the compressor drive circuit, and a function for turning on the heater drive circuit. Comparing the current signal before turning on the heater drive circuit with the current signal after turning on the heater drive circuit when the compressor drive circuit is in the off state, the difference must be a certain value or more. For example, it is possible to determine that the heater is disconnected or that the heater drive circuit is faulty.

これによって、圧縮機駆動回路がオフした状態で、ヒータ駆動回路をオンした後、数秒
以内でヒータの断線もしくはヒータ駆動回路の故障を判断することが可能となる。 As a result, it is possible to determine whether the heater is disconnected or the heater drive circuit has failed within a few seconds after the heater drive circuit is turned on while the compressor drive circuit is turned off.

本発明の空気調和機は、ヒータ駆動回路をオンする前の電流信号とオンした後の電流信号を比較することで、ヒータ駆動回路をオンした後、数秒以内でヒータ回路の断線を検知することができる。   The air conditioner of the present invention detects the disconnection of the heater circuit within a few seconds after turning on the heater drive circuit by comparing the current signal before turning on the heater drive circuit and the current signal after turning on. Can do.

第１の発明は、冷媒を圧縮する圧縮機と、前記圧縮機を駆動する圧縮機駆動回路と、通電により発熱するヒータと、前記ヒータを駆動するヒータ駆動回路と、交流電源と、前記交流電源から供給される電流を検出する電流検出回路と、前記電流検出回路の出力である電流信号を検出する機能及び前記圧縮機駆動回路をオン／オフする機能及び前記ヒータ駆動回路をオン／オフする機能を有するマイクロコンピュータからなり、前記圧縮機駆動回路がオン状態において、前記ヒータ駆動回路をオンする前の電流信号とオンした後の電流信号を比較し、その差が一定値以上なければ、前記ヒータの断線もしくは前記ヒータ駆動回路の故障と判断するヒータ回路断線検知機能を備えたことを特徴とする空気調和機とすることにより、ヒータ駆動回路をオンした後、数秒以内でヒータ回路の断線を検知することができる。   The first invention includes a compressor that compresses a refrigerant, a compressor drive circuit that drives the compressor, a heater that generates heat when energized, a heater drive circuit that drives the heater, an AC power source, and the AC power source. Current detection circuit for detecting a current supplied from the power supply, a function for detecting a current signal output from the current detection circuit, a function for turning on / off the compressor drive circuit, and a function for turning on / off the heater drive circuit When the compressor drive circuit is on, the current signal before turning on the heater drive circuit is compared with the current signal after turning on, and if the difference is not greater than a certain value, the heater A heater drive circuit by providing an air conditioner having a heater circuit disconnection detection function for judging that the heater drive circuit is broken or a failure of the heater drive circuit After turned on, it is possible to detect the disconnection of the heater circuit within seconds.

第２の発明は、冷媒を圧縮する圧縮機と、前記圧縮機を駆動する圧縮機駆動回路と、通電により発熱するヒータと、前記ヒータを駆動するヒータ駆動回路と、交流電源と、前記交流電源から供給される電流を検出する電流検出回路と、前記電流検出回路の出力である電流信号を検出する機能及び前記圧縮機駆動回路をオン／オフする機能及び前記ヒータ駆動回路をオン／オフする機能を有するマイクロコンピュータからなり、前記圧縮機駆動回路がオフ状態において、前記ヒータ駆動回路をオンする前の電流信号とオンした後の電流信号を比較し、その差が一定値以上なければ、前記ヒータの断線もしくは前記ヒータ駆動回路の故障と判断するヒータ回路断線検知機能を備えたことを特徴とする空気調和機とすることにより、ヒータ駆動回路をオンした後、数秒以内でヒータ回路の断線を検知することができる。   According to a second aspect of the present invention, there is provided a compressor for compressing a refrigerant, a compressor drive circuit for driving the compressor, a heater for generating heat by energization, a heater drive circuit for driving the heater, an AC power source, and the AC power source. Current detection circuit for detecting a current supplied from the power supply, a function for detecting a current signal output from the current detection circuit, a function for turning on / off the compressor drive circuit, and a function for turning on / off the heater drive circuit When the compressor drive circuit is in the off state, the current signal before the heater drive circuit is turned on is compared with the current signal after the heater is turned on. A heater drive circuit by providing an air conditioner having a heater circuit disconnection detection function for judging that the heater drive circuit is broken or a failure of the heater drive circuit After turned on, it is possible to detect the disconnection of the heater circuit within seconds.

以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。

（実施の形態１）
図１は、本発明の第１及び第２の実施の形態における空気調和機のブロック図を示すものである。１は冷媒を圧縮する圧縮機、２は圧縮機１を駆動する圧縮機駆動回路、３は通電により発熱するヒータ、４はヒータ３を駆動するヒータ駆動回路、５はヒータとヒータ駆動回路を合わせたヒータ回路、６は交流電源、７は交流電源から供給される電流を検出する電流検出回路、８は電流検出回路の出力である電流信号を検出する機能及び前記圧縮機駆動回路をオン／オフする機能及び前記ヒータ駆動回路をオン／オフする機能を有するマイクロコンピュータである。図１は以下の実施の形態１と実施の形態２に共通のものである。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a block diagram of an air conditioner according to the first and second embodiments of the present invention. 1 is a compressor that compresses refrigerant, 2 is a compressor drive circuit that drives the compressor 1, 3 is a heater that generates heat when energized, 4 is a heater drive circuit that drives the heater 3, and 5 is a combination of the heater and the heater drive circuit The heater circuit, 6 is an AC power supply, 7 is a current detection circuit for detecting a current supplied from the AC power supply, 8 is a function for detecting a current signal output from the current detection circuit, and the compressor drive circuit is turned on / off. And a microcomputer having a function of turning on / off the heater driving circuit. FIG. 1 is common to the following first and second embodiments.

図２は、本発明の第１の実施の形態における空気調和機の動作シーケンスを説明する図である。図２において、圧縮機駆動回路２がオンしている状態において、ヒータ駆動回路４がオンするｍ秒前の電流信号Ｉｍとヒータ駆動回路４がオンしたｎ秒後の電流信号Ｉｎの差ΔＩ＝Ｉｎ−Ｉｍを検出し、その差ΔＩがあらかじめマイクロコンピュータ８内部に設定された値以上であれば、正常に動作しているものと判断し、その差ΔＩがあらかじめマイクロコンピュータ８内部に設定された値未満であれば、ヒータ回路５の断線しているものと判断することができる。   FIG. 2 is a diagram for explaining an operation sequence of the air conditioner according to the first embodiment of the present invention. In FIG. 2, in a state where the compressor driving circuit 2 is on, the difference ΔI = the current signal Im m seconds before the heater driving circuit 4 is turned on and the current signal In n seconds after the heater driving circuit 4 is turned on. If In-Im is detected and the difference ΔI is equal to or greater than the value set in the microcomputer 8 in advance, it is determined that the operation is normal, and the difference ΔI is set in the microcomputer 8 in advance. If it is less than the value, it can be determined that the heater circuit 5 is disconnected.

（実施の形態２）
図３は、本発明の第２の実施の形態における空気調和機の動作シーケンスを説明する図である。図３において、圧縮機駆動回路２がオフしている状態において、ヒータ駆動回路４がオンするｍ秒前の電流信号Ｉｍとヒータ駆動回路４がオンしたｎ秒後の電流信号Ｉｎの差ΔＩ＝Ｉｎ−Ｉｍを検出し、その差ΔＩがあらかじめマイクロコンピュータ８内部に設定された値以上であれば、正常に動作しているものと判断し、その差ΔＩがあらかじめマイクロコンピュータ８内部に設定された値未満であれば、ヒータ回路５の断線しているものと判断することができる。 (Embodiment 2)
FIG. 3 is a diagram illustrating an operation sequence of the air conditioner according to the second embodiment of the present invention. In FIG. 3, in a state in which the compressor driving circuit 2 is turned off, a difference ΔI = the current signal Im m seconds before the heater driving circuit 4 is turned on and the current signal In n seconds after the heater driving circuit 4 is turned on. If In-Im is detected and the difference ΔI is equal to or greater than the value set in the microcomputer 8 in advance, it is determined that the operation is normal, and the difference ΔI is set in the microcomputer 8 in advance. If it is less than the value, it can be determined that the heater circuit 5 is disconnected.

以上のように、本発明にかかる空気調和機は、ヒータ駆動回路をオンする前の電流信号とオンした後の電流信号を比較することで、ヒータ駆動回路をオンした後、数秒以内でヒータ回路の断線を検知することが可能となるので、ヒータ搭載のヒートポンプ式給湯機等の用途にも適用できる。   As described above, the air conditioner according to the present invention compares the current signal before turning on the heater driving circuit with the current signal after turning on, so that the heater circuit is turned on within a few seconds after the heater driving circuit is turned on. Therefore, it can be applied to uses such as a heat pump water heater equipped with a heater.

本発明の実施の形態１及び実施の形態２における空気調和機のブロック図The block diagram of the air conditioner in Embodiment 1 and Embodiment 2 of this invention 本発明の実施の形態１における空気調和機の動作シーケンス図Operation sequence diagram of air conditioner in Embodiment 1 of the present invention 本発明の実施の形態１における空気調和機の動作シーケンス図Operation sequence diagram of air conditioner in Embodiment 1 of the present invention 従来のヒータ断線検出機能を有する空気調和機のブロック図A block diagram of a conventional air conditioner having a function of detecting disconnection of a heater

符号の説明Explanation of symbols

１ 圧縮機
２ 圧縮機駆動回路
３ ヒータ
４ ヒータ駆動回路
５ ヒータ回路
６ 交流電源
７ 電流検出回路
８ マイクロコンピュータ
９ 温度設定機能
１０ ヒータ温度検出機能
１１ 学習機能
１２ 診断機能 DESCRIPTION OF SYMBOLS 1 Compressor 2 Compressor drive circuit 3 Heater 4 Heater drive circuit 5 Heater circuit 6 AC power supply 7 Current detection circuit 8 Microcomputer 9 Temperature setting function 10 Heater temperature detection function 11 Learning function 12 Diagnosis function

Claims (4)

冷媒を圧縮する圧縮機と、前記圧縮機を駆動する圧縮機駆動回路と、通電により発熱するヒータと、前記ヒータを駆動するヒータ駆動回路と、交流電源と、前記交流電源から供給される電流を検出する電流検出回路と、前記電流検出回路の出力である電流信号を検出する機能及び前記圧縮機駆動回路をオン／オフする機能及び前記ヒータ駆動回路をオン／オフする機能を有するマイクロコンピュータからなり、前記圧縮機駆動回路がオン状態において、前記ヒータ駆動回路をオンする前の電流信号とオンした後の電流信号を比較し、その差が一定値以上なければ、前記ヒータの断線もしくは前記ヒータ駆動回路の故障と判断するヒータ回路断線検知機能を備えたことを特徴とする空気調和機。 A compressor that compresses the refrigerant; a compressor drive circuit that drives the compressor; a heater that generates heat when energized; a heater drive circuit that drives the heater; an AC power source; and a current supplied from the AC power source. A microcomputer having a function of detecting a current detection circuit, a function of detecting a current signal output from the current detection circuit, a function of turning on / off the compressor driving circuit, and a function of turning on / off the heater driving circuit; When the compressor driving circuit is on, the current signal before turning on the heater driving circuit is compared with the current signal after turning on, and if the difference is not greater than a certain value, the heater is disconnected or the heater driving An air conditioner having a heater circuit disconnection detection function for judging a circuit failure. 冷媒を圧縮する圧縮機と、前記圧縮機を駆動する圧縮機駆動回路と、通電により発熱するヒータと、前記ヒータを駆動するヒータ駆動回路と、交流電源と、前記交流電源から供給される電流を検出する電流検出回路と、前記電流検出回路の出力である電流信号を検出する機能及び前記圧縮機駆動回路をオン／オフする機能及び前記ヒータ駆動回路をオン／オフする機能を有するマイクロコンピュータからなり、前記圧縮機駆動回路がオフ状態において、前記ヒータ駆動回路をオンする前の電流信号とオンした後の電流信号を比較し、その差が一定値以上なければ、前記ヒータの断線もしくは前記ヒータ駆動回路の故障と判断するヒータ回路断線検知機能を備えたことを特徴とする空気調和機。 A compressor that compresses the refrigerant; a compressor drive circuit that drives the compressor; a heater that generates heat when energized; a heater drive circuit that drives the heater; an AC power source; and a current supplied from the AC power source. A microcomputer having a function of detecting a current detection circuit, a function of detecting a current signal output from the current detection circuit, a function of turning on / off the compressor driving circuit, and a function of turning on / off the heater driving circuit; When the compressor drive circuit is in the off state, the current signal before turning on the heater drive circuit is compared with the current signal after turning on, and if the difference is not greater than a certain value, the heater break or the heater drive An air conditioner having a heater circuit disconnection detection function for judging a circuit failure. ヒータ駆動回路に電磁リレーを用いたことを特徴とする請求項１または２に記載の空気調和機。 The air conditioner according to claim 1 or 2, wherein an electromagnetic relay is used for the heater drive circuit. ヒータ駆動回路にＳＳＲを用いたことを特徴とする請求項１または２に記載の空気調和機。 The air conditioner according to claim 1 or 2, wherein an SSR is used for the heater drive circuit.
JP2005112001A 2005-04-08 2005-04-08 Air conditioner Withdrawn JP2006292239A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7380257B2 (en) 2020-01-28 2023-11-15 株式会社富士通ゼネラル air conditioner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7380257B2 (en) 2020-01-28 2023-11-15 株式会社富士通ゼネラル air conditioner

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