JP5625656B2 - Air conditioner - Google Patents
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- JP5625656B2 JP5625656B2 JP2010205111A JP2010205111A JP5625656B2 JP 5625656 B2 JP5625656 B2 JP 5625656B2 JP 2010205111 A JP2010205111 A JP 2010205111A JP 2010205111 A JP2010205111 A JP 2010205111A JP 5625656 B2 JP5625656 B2 JP 5625656B2
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Description
本発明は、圧力検出手段を搭載した空気調和装置に関わり、特に圧力検出手段検知精度の低下を判断する制御に関するものである。 The present invention relates to an air conditioner equipped with pressure detection means, and more particularly to control for determining a decrease in detection accuracy of pressure detection means.
従来この種の空気調和装置では、冷房運転では低圧圧力一定周波数制御、暖房運転では高圧圧力一定周波数制御と言った能力制御手段が採られている。例えば、図５の従来の空気調和装置における冷凍サイクル図に示すように、冷房運転では吸入管に配した低圧圧力検出手段を用いた低圧圧力一定周波数制御、暖房運転では吐出管に配した高圧圧力検出手段を用いた高圧圧力一定周波数制御をする（例えば特許文献１参照）。 Conventionally, this type of air conditioner employs capacity control means such as low-pressure constant frequency control in cooling operation and high-pressure constant frequency control in heating operation. For example, as shown in the refrigeration cycle diagram of the conventional air conditioner of FIG. 5 , the low pressure constant frequency control using the low pressure detection means arranged in the suction pipe in the cooling operation, and the high pressure pressure arranged in the discharge pipe in the heating operation. High pressure constant frequency control using the detection means is performed (see, for example, Patent Document 1).
しかしながら、上記従来の構成では、空気調和装置で重要な冷暖房能力の決定要素と言える圧縮機の運転周波数を圧力検出手段の検知値に依存しているため、圧力検出手段の特性ずれが生じた場合の影響が大きく、快適性を損なうという課題があった。 However, in the conventional configuration described above, since the operating frequency of the compressor, which can be said to be an important determinant of the air conditioning capacity in the air conditioner, depends on the detection value of the pressure detection means, the characteristic of the pressure detection means is shifted. There was a problem that the influence of the was large, and comfort was impaired.
本発明は、前記従来の課題を解決するもので、圧力検出手段の特性ずれの有無を検知することができる空気調和装置の提供することを目的とするものである。 The present invention solves the above-described conventional problems, and an object of the present invention is to provide an air conditioner that can detect the presence or absence of a characteristic deviation of a pressure detection means.
前記従来の課題を解決するために、本発明の空気調和装置は、圧縮機と、室外熱交換器と、室外送風機と、室外電動膨張弁と、四方弁と、吐出圧力検出手段と、吸入圧力検出手段と、外気温度検出手段と、室外機制御装置とを備えた室外機と、室内熱交換器と、室内送風機と、室内電動膨張弁と、室内機制御装置とを備えた複数の室内機とで構成される多室型空気調和装置において、運転開始時に、停止時間が一定値より大きい場合には、吐出圧力検出手段と吸入圧力検出手段により検出された値を比較し、それぞれの圧力検出手段により検出された値の差が大きい場合、運転開始せず、圧力検出手段の異常を室外機制御装置上に配した表示器に表示し、それぞれの圧力検出手段により検出された値の差が小さい場合、運転開始し、停止時間が一定値より小さい場合には、吐出圧力検出手段と吸入圧力検出手段により検出された値を比較することなく、運転開始することにより、圧力検出手段の誤検知により正常な運転が継続できないことから発生する、性能不足、圧力保護非検知による圧縮機不良を防止することが出来る。 In order to solve the above-described conventional problems, an air conditioner of the present invention includes a compressor, an outdoor heat exchanger, an outdoor fan, an outdoor electric expansion valve, a four-way valve, a discharge pressure detection unit, and a suction pressure. A plurality of indoor units including an outdoor unit including a detection unit, an outdoor air temperature detection unit, and an outdoor unit control device, an indoor heat exchanger, an indoor blower, an indoor electric expansion valve, and an indoor unit control unit If the stop time is greater than a certain value at the start of operation, the values detected by the discharge pressure detection means and the suction pressure detection means are compared, and the respective pressure detection When the difference between the values detected by the means is large, the operation is not started and the abnormality of the pressure detection means is displayed on the indicator arranged on the outdoor unit control device, and the difference between the values detected by the respective pressure detection means is If small, start and stop time Arise from the smaller than a predetermined value, without comparing the detected value by the discharge pressure detecting means and the suction pressure detection means, by starting the operation can not be continued normal operation by erroneous detection of the pressure detecting means It is possible to prevent compressor failure due to insufficient performance and non-detection of pressure protection.
本発明は、圧力検出手段の特性ずれの有無を検知することができる空気調和装置の提供することができる。 The present invention can provide an air-conditioning apparatus that can detect the presence or absence of a characteristic deviation of the pressure detection means.
第１の発明の空気調和装置は、圧縮機と、室外熱交換器と、室外送風機と、室外電動膨張弁と、四方弁と、吐出圧力検出手段と、吸入圧力検出手段と、外気温度検出手段と、室外機制御装置とを備えた室外機と、室内熱交換器と、室内送風機と、室内電動膨張弁と、室内機制御装置とを備えた複数の室内機とで構成される多室型空気調和装置において、運転開始時に、停止時間が一定値より大きい場合には、吐出圧力検出手段と吸入圧力検出手段により検出された値を比較し、それぞれの圧力検出手段により検出された値の差が大きい場合、圧力検出手段の異常を室外機制御装置上に配した表示器に表示し、それぞれの圧力検出手段により検出された値の差が小さい場合、運転開始し、停止時間が一定値より小さい場合には、吐出圧力検出手段と吸入圧力検出手段により検出された値を比較することなく、運転開始することにより、圧力検出手段の誤検知により正常な運転が継続できないことから発生する、性能不足、圧力保護非検知による圧縮機不良を防止することが出来る。 An air conditioner according to a first aspect of the present invention includes a compressor, an outdoor heat exchanger, an outdoor fan, an outdoor electric expansion valve, a four-way valve, discharge pressure detection means, suction pressure detection means, and outdoor air temperature detection means. And a multi-room type comprising a plurality of indoor units including an outdoor unit including an outdoor unit control device, an indoor heat exchanger, an indoor fan, an indoor electric expansion valve, and an indoor unit control device. In the air conditioner, when the stop time is greater than a certain value at the start of operation, the values detected by the discharge pressure detection means and the suction pressure detection means are compared, and the difference between the values detected by the respective pressure detection means Is large, the abnormality of the pressure detection means is displayed on the indicator arranged on the outdoor unit control device. If small, discharge pressure detection hand And without comparing the detected value by the suction pressure detection means, by starting the operation, generated from the inability continued normal operation by erroneous detection of the pressure detecting means, poor performance, pressure protection non-detection by the compressor Defects can be prevented.
第２の発明の空気調和装置は、圧縮機と、室外熱交換器と、室外送風機と、室外電動膨張弁と、四方弁と、吐出圧力検出手段と、吸入圧力検出手段と、外気温度検出手段と、室外機制御装置とを備えた室外機と、室内熱交換器と、室内送風機と、室内電動膨張弁と、室内機制御装置とを備えた複数の室内機とで構成される多室型空気調和装置において、運転開始時に、外気温度変化が一定値より小さく、かつ、停止時間が一定値より大きい場合には、吐出圧力検出手段と吸入圧力検出手段により検出された値を比較し、それぞれの圧力検出手段により検出された値の差が大きい場合、運転開始せず、圧力検出手段の異常を室外機制御装置上に配した表示器に表示し、それぞれの圧力検出手段により検出された値の差が小さい場合、運転開始し、外気温度変化が一定値より大きい、または、停止時間が一定値より小さい場合には、吐出圧力検出手段と吸入圧力検出手段により検出された値を比較することなく、運転開始することにより、圧力検出手段の誤検知により正常な運転が継続できないことから発生する、性能不足、圧力保護非検知による圧縮機不良を防止することが出来る。 An air conditioner according to a second aspect of the present invention includes a compressor, an outdoor heat exchanger, an outdoor blower, an outdoor electric expansion valve, a four-way valve, a discharge pressure detection means, a suction pressure detection means, and an outside air temperature detection means. And a multi-room type comprising a plurality of indoor units including an outdoor unit including an outdoor unit control device, an indoor heat exchanger, an indoor fan, an indoor electric expansion valve, and an indoor unit control device. In the air conditioner, at the start of operation, when the outside air temperature change is smaller than a certain value and the stop time is larger than a certain value, the values detected by the discharge pressure detecting means and the suction pressure detecting means are compared, When the difference between the values detected by the pressure detection means is large, the operation is not started and the abnormality of the pressure detection means is displayed on the indicator arranged on the outdoor unit control device, and the value detected by each pressure detection means If the difference is small, Greater than the outside air temperature change is constant value, or if the stop time is less than the predetermined value, without comparing the detected value by the discharge pressure detecting means and the suction pressure detection means, Ri particular good starts operating, arising from inability continued normal operation by erroneous detection of the pressure detecting means, poor performance, it is possible to prevent the compressor failure due to pressure protection non-detection.
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。 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.
（実施の形態１）
図１は本発明の空気調和装置の冷凍サイクル図である。圧縮機１と、室外熱交換器３と、室外送風機４と、室外電動膨張弁５と、四方弁６と、吐出圧力検出手段２と、吸入圧力検出手段８と、外気温度検出手段９と、室外機制御装置１０とを備えた室外機１１と、室内熱交換器１２と、室内送風機１３と、室内電動膨張弁１４と、室内機制御装置１５とを備えた複数の室内機１６とで構成されている。
(Embodiment 1)
FIG. 1 is a refrigeration cycle diagram of the air conditioner of the present invention. Compressor 1, outdoor heat exchanger 3, outdoor blower 4, outdoor electric expansion valve 5, four-way valve 6, discharge pressure detection means 2, suction pressure detection means 8, and outside air temperature detection means 9, An outdoor unit 11 provided with an outdoor unit control device 10, an indoor heat exchanger 12, an indoor blower 13, an indoor electric expansion valve 14, and a plurality of indoor units 16 provided with an indoor unit control device 15. Has been.
図２は本実施の形態１における空気調和装置のフローチャート図である。本実施の形態において、室内機制御装置１５から運転開始信号受信（ＳＴＥＰ０１）をしたとき、吐出圧力検出手段２により検出された値Ｐｄ（ＭＰａ）（ＳＴＥＰ０２）と、吸入圧力検出手段８により検出された値Ｐｓ（ＭＰａ）（ＳＴＥＰ０２）とを比較（ＳＴＥＰ０３）し、差圧が所定値ΔＰを超えなかった場合は、空気調和装置の運転を開始（ＳＴＥＰ０４）し、差圧が所定値ΔＰを超えた場合は、室外機制御装置１０上に配した表示器（例えば７セグメント）に異常表示（ＳＴＥＰ０５）を行う。 FIG. 2 is a flowchart of the air conditioner according to the first embodiment. In the present embodiment, when the operation start signal is received (STEP 01) from the indoor unit control device 15, the value Pd (MPa) (STEP 02) detected by the discharge pressure detecting means 2 and the suction pressure detecting means 8 are detected. The value Ps (MPa) (STEP02) is compared (STEP03). If the differential pressure does not exceed the predetermined value ΔP, the operation of the air conditioner is started (STEP04), and the differential pressure exceeds the predetermined value ΔP. In the case of failure, an abnormality display (STEP 05) is performed on a display (for example, 7 segments) arranged on the outdoor unit control device 10.
このことにより、高低圧がバランスして起動可能な状態の空気調和機が運転する前に、高圧圧力検知手段または低圧圧力検知手段の誤検知が行え、圧力検出手段の誤検知により正常な運転が継続できないことから発生する、性能不足、圧力保護非検知による圧縮機不良を防止することが出来るものである。 This enables erroneous detection of the high pressure detection means or the low pressure detection means before the operation of the air conditioner in which the high and low pressures are balanced and can be started. It is possible to prevent compressor failure due to insufficient performance and non-detection of pressure protection, which are caused by being unable to continue.
（実施の形態２）
図３は本実施の形態２における空気調和装置のフローチャート図である。本実施の形態において、運転停止（ＳＴＥＰ３１）時に停止時間のカウント（ＳＴＥＰ３２）を行い、室内機制御装置１５から運転開始信号受信（ＳＴＥＰ３３）をしたとき、停止時間が一定の閾値（Ｔｉｍｅ＿ｏｆｆＡ）を経過したかの停止時間判定（ＳＴＥＰ３４）を行い、停止時間が一定閾値（Ｔｉｍｅ＿ｏｆｆＡ）を経過していない場合は、空気調和装置の運転を開始（ＳＴＥＰ３８）する。
(Embodiment 2)
FIG. 3 is a flowchart of the air conditioner according to the second embodiment. In the present embodiment, when the operation is stopped (STEP 31), the stop time is counted (STEP 32), and when the operation start signal is received (STEP 33) from the indoor unit controller 15, the stop time has passed a certain threshold (Time_offA). The stop time determination (STEP 34) is performed. If the stop time has not passed the fixed threshold (Time_offA), the operation of the air conditioner is started (STEP 38).
またＳＴＥＰ３４にて、停止時間が一定閾値（Ｔｉｍｅ＿ｏｆｆＡ）を経過した場合、吐出圧力検出手段２により検出された値Ｐｄ（ＭＰａ）（ＳＴＥＰ３５）と吸入圧力検出手段８により検出された値Ｐｓ（ＭＰａ）（ＳＴＥＰ３５）を比較（ＳＴＥＰ３６）する。 In STEP 34, when the stop time has passed a certain threshold (Time_offA), the value Pd (MPa) detected by the discharge pressure detecting means 2 (STEP 35) and the value Ps (MPa) detected by the suction pressure detecting means 8 (STEP 35) is compared (STEP 36).
その結果、差圧が所定値ΔＰを超えなかった場合は、空気調和装置の運転を開始（ＳＴＥＰ３８）し、差圧が所定値ΔＰを超えた場合は、室外機制御装置１０上に配した表示器（例えば７セグメント）に異常表示（ＳＴＥＰ３７）を行う。このことにより、空気調和機の停止時間が長く、確実に高低圧がバランスして起動可能な状態の空気調和機が運転する前に、高圧圧力検知手段または低圧圧力検知手段の誤検知を空気調和機の停止時間によって判定することが行え、圧力検出手段の誤検知により正常な運転が継続できないことから発生する、性能不足、圧力保護非検知による圧縮機不良を防止することが出来るものである。 As a result, when the differential pressure does not exceed the predetermined value ΔP, the operation of the air conditioner is started (STEP 38), and when the differential pressure exceeds the predetermined value ΔP, the display arranged on the outdoor unit control device 10 An abnormal display (STEP 37) is performed on a device (for example, 7 segments). As a result, before the air conditioner in a state where the air conditioner is in a state where the air conditioner can be started with a long balance between high and low pressures, the high-pressure pressure detection means or the low-pressure pressure detection means is erroneously detected. It can be determined by the stop time of the machine, and it is possible to prevent a compressor failure due to insufficient performance and pressure protection non-detection, which occur because normal operation cannot be continued due to erroneous detection of the pressure detection means.
（実施の形態３）
図４は本実施の形態３の空気調和装置のフローチャート図である。本実施の形態において、運転停止（ＳＴＥＰ４１）時に停止時間のカウント（ＳＴＥＰ４２）を行い、室内機制御装置１５から運転開始信号受信（ＳＴＥＰ４３）をしたとき、外気温度検出手段９により検出された外気温度Ｔ０（℃）の変化が所定値Ｓ（Ｋ）以内を所定時間Ｎ（分）以上継続したかの外気温度変化判定（ＳＴＥＰ４４）を行う。
(Embodiment 3)
FIG. 4 is a flowchart of the air conditioner of the third embodiment. In the present embodiment, when the operation is stopped (STEP 41), the stop time is counted (STEP 42), and when the operation start signal is received (STEP 43) from the indoor unit controller 15, the outside air temperature detection means 9 detects the outside air temperature. An outside air temperature change determination (STEP 44) is performed as to whether the change in T0 (° C.) has continued within a predetermined value S (K) for a predetermined time N (minutes) or longer.
その結果、外気温度Ｔ０（℃）の変化が所定値Ｓ（Ｋ）以内を所定時間Ｎ（分）以上継続しなかった場合は、空気調和装置の運転を開始（ＳＴＥＰ４９）し、外気温度Ｔ０（℃）の変化が所定値Ｓ（Ｋ）以内を所定時間Ｎ（分）以上継続した場合は、ＳＴＥＰ４５へ進む。 As a result, if the change in the outside air temperature T0 (° C.) does not continue within the predetermined value S (K) for the predetermined time N (minutes) or longer, the operation of the air conditioner is started (STEP 49), and the outside air temperature T0 ( When the change in (° C.) continues within the predetermined value S (K) for the predetermined time N (minutes) or longer, the process proceeds to STEP 45.
そして、ＳＴＥＰ４５では停止時間が一定閾値（Ｔｉｍｅ＿ｏｆｆＡ）を経過したかの停止時間判定（ＳＴＥＰ４５）を行い、停止時間が一定閾値（Ｔｉｍｅ＿ｏｆｆＡ）を経過していない場合、空気調和装置の運転を開始（ＳＴＥＰ４９）し、停止時間が一定閾値（Ｔｉｍｅ＿ｏｆｆＡ）を経過していた場合、ＳＴＥＰ４６へ進む。 Then, in STEP 45, a stop time determination (STEP 45) is performed to determine whether the stop time has passed a certain threshold (Time_offA). If the stop time has not exceeded the certain threshold (Time_offA), the operation of the air conditioner is started (STEP 49). If the stop time has exceeded a certain threshold (Time_offA), the process proceeds to STEP46.
そして、ＳＴＥＰ４６では、吐出圧力検出手段２により検出された値Ｐｄ（ＭＰａ）（ＳＴＥＰ４６）と、吸入圧力検出手段８により検出された値Ｐｓ（ＭＰａ）（ＳＴＥＰ４６）を比較（ＳＴＥＰ４７）し、差圧が所定値ΔＰを超えなかった場合、空気調和装置の運転を開始（ＳＴＥＰ４９）し、差圧が所定値ΔＰを超えた場合、室外機制御装置１０上に配した表示器（例えば７セグメント）に異常表示（ＳＴＥＰ４８）を行う。 In STEP 46, the value Pd (MPa) (STEP 46) detected by the discharge pressure detecting means 2 and the value Ps (MPa) (STEP 46) detected by the suction pressure detecting means 8 are compared (STEP 47), and the differential pressure is determined. If the pressure does not exceed the predetermined value ΔP, the operation of the air conditioner is started (STEP 49). If the differential pressure exceeds the predetermined value ΔP, the indicator (for example, 7 segments) arranged on the outdoor unit control device 10 is displayed. Abnormal display (STEP 48) is performed.
このことにより、空気調和機の停止時間が長く、かつ、外気温度変化が少ない場合に、確実に高低圧がバランスして起動可能な状態の空気調和機が運転する前に、高圧圧力検知手段または低圧圧力検知手段の誤検知を空気調和機の停止時間と外気温度変化によって判定することが行え、圧力検出手段の誤検知により正常な運転が継続できないことから発生
する、性能不足、圧力保護非検知による圧縮機不良を防止することが出来るものである。
Thus, a long downtime of the air conditioner, and, when the outside air temperature change is small, before the reliably high or low pressure air conditioner bootable and balanced operated, high-pressure detection means or Misdetection of low-pressure pressure detection means can be determined by the stop time of the air conditioner and changes in the outside air temperature, resulting in insufficient performance due to incorrect detection of the pressure detection means, non-detection of pressure protection It is possible to prevent a compressor failure due to.
本発明の空気調和装置は、１系統の多室型空気調和装置に限定されるものではなく、複数の系統の室外機を接続した室外マルチタイプの空気調和装置にも適用できる。 The air conditioner of the present invention is not limited to a single-system multi-room air conditioner, and can also be applied to an outdoor multi-type air conditioner in which a plurality of systems of outdoor units are connected.
１ 圧縮機
２ 吐出圧力検出手段
３ 室外熱交換器
４ 室外送風機
５ 室外電動膨張弁
６ 四方弁
８ 吸入圧力検出手段
９ 外気温度検出手段
１０ 室外機制御装置
１１ 室外機
１２ 室内熱交換器
１３ 室内送風機
１４ 室内電動膨張弁
１５ 室内機制御装置
１６ 室内機
DESCRIPTION OF SYMBOLS 1 Compressor 2 Discharge pressure detection means 3 Outdoor heat exchanger 4 Outdoor blower 5 Outdoor electric expansion valve 6 Four-way valve 8 Suction pressure detection means 9 Outdoor temperature detection means 10 Outdoor unit control apparatus 11 Outdoor unit 12 Indoor heat exchanger 13 Indoor blower 14 indoor electric expansion valve 15 indoor unit control device 16 indoor unit
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| Application Number | Priority Date | Filing Date | Title |
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| JP2010205111A JP5625656B2 (en) | 2010-09-14 | 2010-09-14 | Air conditioner |
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| JP2010205111A JP5625656B2 (en) | 2010-09-14 | 2010-09-14 | Air conditioner |
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| JP2012063034A JP2012063034A (en) | 2012-03-29 |
| JP5625656B2 true JP5625656B2 (en) | 2014-11-19 |
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| JP2010205111A Expired - Fee Related JP5625656B2 (en) | 2010-09-14 | 2010-09-14 | Air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105650819B (en) * | 2016-02-01 | 2019-11-15 | 青岛海尔空调电子有限公司 | A control method for high-temperature refrigeration of multi-connected air conditioners |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0627598B2 (en) * | 1986-08-13 | 1994-04-13 | 三菱重工業株式会社 | Failure diagnosis method for pressure sensor in refrigeration system |
| JPH01137175A (en) * | 1987-11-24 | 1989-05-30 | Mitsubishi Heavy Ind Ltd | Method of diagnosing trouble of pressure sensor in refrigerator |
| JPH0765792B2 (en) * | 1989-02-28 | 1995-07-19 | ダイキン工業株式会社 | Air conditioner |
| JPH07101130B2 (en) * | 1989-04-12 | 1995-11-01 | ダイキン工業株式会社 | Operation control device for air conditioner |
| JP3128299B2 (en) * | 1991-11-25 | 2001-01-29 | 三洋電機株式会社 | Abnormality detection method of pressure sensor in air conditioner |
| JP2002266616A (en) * | 2001-03-13 | 2002-09-18 | Denso Corp | Engine oil feeder |
| JP4110276B2 (en) * | 2003-10-03 | 2008-07-02 | 株式会社日立製作所 | Refrigerant filling apparatus and refrigerant filling method |
| JP2008175444A (en) * | 2007-01-17 | 2008-07-31 | Daikin Ind Ltd | Air conditioner |
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| JP2012063034A (en) | 2012-03-29 |
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