JP2012063034A - Air conditioner - Google Patents

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JP2012063034A
JP2012063034A JP2010205111A JP2010205111A JP2012063034A JP 2012063034 A JP2012063034 A JP 2012063034A JP 2010205111 A JP2010205111 A JP 2010205111A JP 2010205111 A JP2010205111 A JP 2010205111A JP 2012063034 A JP2012063034 A JP 2012063034A
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pressure detection
detection
air conditioner
outdoor
indoor
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JP5625656B2 (en
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Goji Ohira
剛司 大平
Toshiya Maruoka
俊也 丸岡
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Panasonic Corp
パナソニック株式会社
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Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner capable of detecting the presence of characteristic deviation of a pressure detector.SOLUTION: An outdoor unit 11 includes a compressor 1, an outdoor heat exchanger 3, an outdoor blower 4, an outdoor electric expansion valve 5, a four-way valve 6, a discharge pressure detector 2, an intake pressure detector 8, an outside air temperature detector 9, and an outdoor unit control device 10. A multi-room type air conditioner includes the outdoor unit and a plurality of indoor units 16 equipped with an indoor heat exchanger 12, an indoor blower 13, an indoor electric expansion valve 14, and an indoor control device 15. At the start of operation, the value detected with the discharge pressure detector is compared with the value detected with the intake pressure detector. If a differential pressure between the values detected with respective pressure detector is large, abnormal conditions at the pressure detector are indicated on an indicator arranged on the outdoor unit control device.

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3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 in the conventional air conditioner of FIG. 3, 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).
特開平3−241260号公報JP-A-3-241260
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圧が大きい場合、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 In the multi-chamber type air conditioner configured by the above, when the values detected by the discharge pressure detection means and the suction pressure detection means are compared at the start of operation, and the differential pressure between the values detected by the respective pressure detection means is large By displaying the abnormality of the pressure detection means on the display unit arranged on the outdoor unit control device, the normal operation cannot be continued due to the false detection of the pressure detection means. Prevent machine failure It can be.
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.
本発明の実施の形態1における空気調和装置の冷凍サイクル図Refrigeration cycle diagram of the air-conditioning apparatus according to Embodiment 1 of the present invention 本発明の実施の形態2における空気調和装置のフローチャート図The flowchart figure of the air conditioning apparatus in Embodiment 2 of this invention. 本発明の実施の形態3における空気調和装置のフローチャート図The flowchart figure of the air conditioning apparatus in Embodiment 3 of this invention. 本発明の実施の形態4における空気調和装置のフローチャート図The flowchart figure of the air conditioning apparatus in Embodiment 4 of this invention. 従来の空気調和装置における冷凍サイクル図Refrigeration cycle diagram in a conventional air conditioner
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圧が大きい場合、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, the values detected by the discharge pressure detection means and the suction pressure detection means at the start of operation are compared, and if the differential pressure detected by each pressure detection means is large, the abnormality of the pressure detection means is detected outdoors. By displaying on the display unit on the machine control device, it is possible to prevent insufficient performance and compressor failure due to non-detection of pressure protection, which are caused by the fact that normal operation cannot be continued due to erroneous detection of the pressure detection means. .
第2の発明の空気調和装置は、特に第1の発明において、停止時間が一定値以上の運転開始時に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圧が大きい場合、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することにより、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前するに、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。   The air conditioner according to a second aspect of the present invention compares the values detected by the discharge pressure detection means and the suction pressure detection means at the start of operation with a stop time equal to or greater than a certain value, particularly in the first aspect of the invention. When the pressure difference detected by the air pressure is large, the abnormal condition of the pressure detection means is displayed on the indicator provided on the outdoor unit control unit, so that the air conditioner has a long stop time and ensures that the high and low pressures are balanced. When the air conditioner in a startable state is ready for operation, erroneous detection of the high pressure detection means or low pressure detection means can be determined by the stop time of the air conditioner, Compressor failure due to insufficient performance and pressure protection non-detection caused by the inability to continue operation can be prevented.
第3の発明の空気調和装置は、特に第1の発明において、停止時間が一定値以上で外気温度変化が一定値以下の運転開始時に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圧が大きい場合、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することにより、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前するに、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。   In the air conditioner of the third invention, in particular, in the first invention, the values detected by the discharge pressure detecting means and the suction pressure detecting means at the start of operation when the stop time is equal to or greater than a certain value and the outside air temperature change is equal to or less than the certain value. In comparison, when the pressure difference between the values detected by the pressure detection means is large, the abnormality of the pressure detection means is displayed on the indicator arranged on the outdoor unit control device, so that the stop time of the air conditioner is long. In addition, when the air conditioner in a state where the high and low pressures are balanced and can be started up is surely operated when the outside air temperature change is small, erroneous detection of the high pressure detection means or the low pressure detection means is detected. Judgment can be made based on the stop time and the change in outside air temperature, and it is possible to prevent poor performance due to incorrect detection of the pressure detection means and failure of the compressor due to inadequate performance and non-detection of pressure protection. It can be.
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前するに、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。
As a result, the high-pressure detection means or the low-pressure detection means can be erroneously detected before the air conditioner in a state where the high and low pressures are balanced and can be started, and normal operation can be performed by the erroneous detection of the pressure detection means. 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前するに、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). This makes it possible to prevent false detection of the high-pressure pressure detection means or the low-pressure pressure detection means before the operation of the air conditioner in a state where the air conditioner can be started with a long balance between high and low pressures. 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 value (Time_offA). 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前するに、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。
As a result, when the air conditioner in a state where the air conditioner in a state where the high and low pressures can be balanced and started can be reliably operated when the stop time of the air conditioner is long and the outside air temperature change is small, 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

Claims (3)

  1. 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圧が大きい場合、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することを特徴とする空気調和装置。 A compressor, an outdoor heat exchanger, an outdoor fan, an outdoor electric expansion valve, a four-way valve, a discharge pressure detection means, a suction pressure detection means, an outside air temperature detection means, and an outdoor unit control device are provided. Discharge pressure at the start of operation in a multi-room air conditioner composed of an outdoor unit, an indoor heat exchanger, an indoor blower, an indoor electric expansion valve, and a plurality of indoor units equipped with an indoor unit control device The value detected by the detection means and the suction pressure detection means is compared, and if the differential pressure between the values detected by the respective pressure detection means is large, an abnormality of the pressure detection means is displayed on the indicator arranged on the outdoor unit control device. An air conditioner characterized by displaying.
  2. 停止時間が一定値以上の運転開始時に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圧が大きい場合、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することを特徴とする請求項1に記載の空気調和装置。 The value detected by the discharge pressure detection means and the suction pressure detection means at the start of operation when the stop time is equal to or greater than a certain value is compared. If the differential pressure detected by each pressure detection means is large, the pressure detection means is abnormal. Is displayed on a display device arranged on the outdoor unit control device.
  3. 停止時間が一定値以上で外気温度変化が一定値以下の運転開始時に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圧が大きい場合、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することを特徴とする請求項1に記載の空気調和装置。 The values detected by the discharge pressure detection means and the suction pressure detection means at the start of operation when the stop time is equal to or greater than a certain value and the outside air temperature change is equal to or less than a certain value are compared. The air conditioner according to claim 1, wherein when it is larger, an abnormality of the pressure detecting means is displayed on a display device arranged on the outdoor unit control device.
JP2010205111A 2010-09-14 2010-09-14 Air conditioner Expired - Fee Related JP5625656B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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JPS6346358A (en) * 1986-08-13 1988-02-27 Mitsubishi Heavy Ind Ltd Method of diagnosing trouble of pressure sensor in refrigerator
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Publication number Priority date Publication date Assignee Title
CN105650819A (en) * 2016-02-01 2016-06-08 青岛海尔空调电子有限公司 Control method for high temperature refrigeration of multi-split air conditioner
CN105650819B (en) * 2016-02-01 2019-11-15 青岛海尔空调电子有限公司 A kind of control method for multi-gang air-conditioner high-temperature refrigeration

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