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JP2004044868A - Condenser fan control mechanism - Google Patents

Condenser fan control mechanism Download PDF

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Publication number
JP2004044868A
JP2004044868A JP2002201047A JP2002201047A JP2004044868A JP 2004044868 A JP2004044868 A JP 2004044868A JP 2002201047 A JP2002201047 A JP 2002201047A JP 2002201047 A JP2002201047 A JP 2002201047A JP 2004044868 A JP2004044868 A JP 2004044868A
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JP
Japan
Prior art keywords
condenser fan
condenser
temperature
memory
control mechanism
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.)
Pending
Application number
JP2002201047A
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Japanese (ja)
Inventor
Kiyoshi Masui
増井 潔
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.)
Daiwa Industries Ltd
Original Assignee
Daiwa Industries 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
Publication date
Application filed by Daiwa Industries Ltd filed Critical Daiwa Industries Ltd
Priority to JP2002201047A priority Critical patent/JP2004044868A/en
Publication of JP2004044868A publication Critical patent/JP2004044868A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/11Fan speed control
    • F25B2600/111Fan speed control of condenser fans
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21Temperatures
    • F25B2700/2106Temperatures of fresh outdoor air
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/027Condenser control arrangements
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Air Conditioning Control Device (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

【課題】凝縮器ファンの運転を周囲温度に対応した能力で連続運転とすることにより、電力の無駄使いを排し、圧縮機への過負荷の発生を排した凝縮器ファンの制御機構を提供する。
【解決手段】冷凍サイクルの凝縮器11出口配管の、または凝縮器を通過した空気の温度を測定する温度検出器12と、その温度検出器で検出した凝縮温度の変動範囲をT1 ……Tn に区分して書き込んだメモリー▲1▼と、この区分T1 ……Tn に対応する凝縮器ファンの回転数N1 ……Nn のメモリー▲2▼とからなり、上記温度検出器の検出情報をメモリー▲1▼と照合し、メモリー▲1▼に対応するメモリー▲2▼により凝縮器ファンの回転数を制御する構成を採用したもので、冷凍サイクルの運転開始時の凝縮器ファンの回転数は、凝縮温度TC に対応する回転数より低いレベルからスタートするようにし、上記凝縮器ファンの回転数N1 ……Nn は、互いにオーバーラップさせたものである。
【選択図】 図1
Provided is a condenser fan control mechanism that eliminates waste of power and prevents overloading of a compressor by making the operation of a condenser fan a continuous operation with a capacity corresponding to an ambient temperature. I do.
SOLUTION: A temperature detector 12 for measuring a temperature of air at an outlet pipe of the condenser 11 of the refrigeration cycle or passing through the condenser, and a fluctuation range of the condensation temperature detected by the temperature detector is represented by T 1. n , and a memory (2) of the condenser fan rotation speeds N 1 ... N n corresponding to the divisions T 1 ... T n . The detection information is compared with the memory (1), and the rotation speed of the condenser fan is controlled by the memory (2) corresponding to the memory (1). The number of revolutions starts from a level lower than the number of revolutions corresponding to the condensing temperature T C, and the number of revolutions N 1 ... N n of the condenser fan overlap each other.
[Selection diagram] Fig. 1

Description

【0001】
【発明の属する技術分野】
この発明は、冷凍サイクルにおける凝縮器ファンの制御に関する。
【0002】
【従来の技術】
冷凍サイクルにおいて凝縮器は、圧縮された冷媒ガスから圧縮熱を取り去って液化させる部分であり、圧縮熱を取り去る手段として凝縮器ファンモータ(CFM)が採用されている(図3(a))。
【0003】
また、凝縮器ファンモータ(CFM)の効率的運転のために凝縮器出口直後の配管に温度検出器を取付け、検出温度が設定温度(例えば35℃)を越えたときはリレー32を閉じて凝縮器ファンモータを運転し、逆にそれより低い設定温度(例えば25℃)より下がったときはリレー32を開いて凝縮器ファンモータを停止するようにしたものがある(図3(b),33:電源スイッチ)。
【0004】
【発明が解決しようとする課題】
上記従来技術において前者は、凝縮器ファンモータの能力は、周囲温度が高温であるときを基準にして設定されているため、周囲温度がそれより低い場合は凝縮器ファンモータは過剰能力となって電力の無駄使いになっている。
【0005】
また後者は、凝縮器ファンモータの運転をオン・オフ制御する方式で、凝縮器ファンモータの運転を開始してから実際に凝縮器が冷却されるまでにタイムラグがあり、その間に凝縮圧が上昇して圧縮機に大きな負荷が掛かり故障あるいは圧縮機の寿命を縮める原因となっている。
【0006】
上記問題に鑑みこの発明は、凝縮器ファンモータ(以下、「モータ」を省略)の運転を周囲温度に対応した能力で連続運転とすることにより、電力の無駄使いを排し、圧縮機への過負荷の発生を排した凝縮器ファンの制御機構を提供することを課題とする。
【0007】
【課題を解決するための手段】
上記課題を解決するためにこの発明は、冷凍サイクルの凝縮器出口配管の、または凝縮器を通過した空気の温度を測定する温度検出器と、その温度検出器にて検出した凝縮温度の変動範囲をT1 ……Tn に区分して書き込んだメモリー▲1▼と、この区分T1 ……Tn に対応する凝縮器ファンの回転数N1 ……Nn のメモリー▲2▼とからなり、上記温度検出器の検出情報をメモリー▲1▼と照合し、メモリー▲1▼に対応するメモリー▲2▼により凝縮器ファンの回転数を制御する構成を採用したもので(請求項1)、冷凍サイクルの運転開始時の凝縮器ファンの回転数は、凝縮温度TC に対応する回転数より低いレベルからスタートするようにし(請求項2)、上記凝縮器ファンの回転数N1 ……Nn は、互いにオーバーラップさせた(請求項3)ものである。
【0008】
上記の如く構成するこの発明によれば、凝縮器出口配管の温度、または凝縮器を通過した空気の温度に対応して凝縮器ファンの回転数を選択するので適切な送風が行われて電力の節約となり、また凝縮器ファンを連続運転しながら回転数を変えて冷却能力を変えるものであるから、タイムラグがなく、そのため凝縮圧力が上昇して圧縮機に負荷が掛かり故障あるいは寿命を縮めるという問題が解決される。
【0009】
【発明の実施の形態】
次に図1および図2を参照しながらこの発明の実施形態を説明する。凝縮器11の出口配管に温度検出器12が設置され、温度検出器12の情報はメモリー(T1 ……T6 )に照合され、その情報は、メモリー(N1 ……N6 )に照合されて所定の回転数に対応する電圧がブラシレスモータ13に供給される。
【0010】
冷凍機を始動するときの条件設定は、温度検出器で検出された凝縮温度TC に対応する回転数の低い回転数からスタートする。例えばT4 ≧Tc ≧T3 のとき、これに対応する回転数はN3 とN4 であるが、節電効果をあげるために回転数N3 からスタートする。
【0011】
図2を見ると、温度区分(T1 ……T6 )に対し、凝縮器ファンの回転数の区分(N1 ……N6 )はオーバーラップしている。これは、高い温度区分から低い温度区分に順次移行(矢印)するとき、また、低い温度区分から高い温度区分に順次移行(矢印)するとき、移行先が設定範囲のほぼ中間にあってスムーズに移行できるように考慮したものである。
【0012】
上述のようにN3 でスタートすると温度検出器12の検出値はT4 >Tc になるか、ブラシレスモータ13(凝縮器ファン)の回転により凝縮器11の出口配管の温度TがT4 ≧T≧T3 でバランスするか、あるいは温度が下がりT<T3 になるかのいずれかである。
【0013】
この時、温度が上昇してN4 に移行するときは移行先がオーバーラップしているのでスムーズに移行する。また、ファン13の回転により凝縮器11の出口配管の温度が下がりN2 に移行するときは移行先がオーバーラップしているのでスムーズに移行・制御される。
【0014】
上記実施形態ではブラシレスモータ13を採用したが、この他、公知の周波数制御、電圧制御、電流制御による可変速モータを採用できる。また、上記実施形態では温度検出器を凝縮器の出口配管に設置したが、凝縮器を通過した空気の温度を測定するようにしてもよい。
【0015】
【発明の効果】
以上説明した如くこの発明によれば、凝縮器出口配管の温度に対応して凝縮器ファンの回転数を選択するので適切な送風が行われるので電力の節約となり、また凝縮器ファンを連続運転して回転数を変えるものであるから、タイムラグがなく、そのために凝縮圧力が上昇して圧縮機に負荷が掛かり故障あるいは寿命を縮めるという問題がなくなる。
【図面の簡単な説明】
【図1】この発明に係る凝縮器ファンの制御フロー
【図2】同凝縮器ファンの制御説明図
【図3】(a)従来の凝縮器ファンの制御回路図(その1)
(b)従来の凝縮器ファンの制御回路図(その2)
【符号の説明】
11 凝縮器
12 温度検出器
13 ブラシレスモータ
32 リレー
33 電源スイッチ
CPR 冷媒ガス圧縮機
CFM 凝縮器ファンモータ
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to control of a condenser fan in a refrigeration cycle.
[0002]
[Prior art]
In the refrigeration cycle, the condenser is a part that removes the compression heat from the compressed refrigerant gas and liquefies it, and a condenser fan motor (CFM) is employed as a means for removing the compression heat (FIG. 3A).
[0003]
For efficient operation of the condenser fan motor (CFM), a temperature detector is attached to the pipe immediately after the condenser outlet, and when the detected temperature exceeds the set temperature (for example, 35 ° C.), the relay 32 is closed to condense. In some cases, the condenser fan motor is operated, and when the temperature falls below a lower set temperature (for example, 25 ° C.), the relay 32 is opened to stop the condenser fan motor (FIGS. 3B and 33). : Power switch).
[0004]
[Problems to be solved by the invention]
In the prior art, the former is based on the fact that the capacity of the condenser fan motor is set based on when the ambient temperature is high, so that when the ambient temperature is lower than that, the condenser fan motor has an excess capacity. Electricity is being wasted.
[0005]
The latter is a method that controls the operation of the condenser fan motor on and off.There is a time lag between the start of the operation of the condenser fan motor and the actual cooling of the condenser, during which the condensing pressure increases. As a result, a large load is applied to the compressor, causing a failure or shortening the life of the compressor.
[0006]
In view of the above problems, the present invention eliminates waste of electric power by making the operation of a condenser fan motor (hereinafter, “motor”) a continuous operation with a capacity corresponding to the ambient temperature. An object of the present invention is to provide a condenser fan control mechanism that eliminates the occurrence of overload.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a temperature detector for measuring the temperature of air at a condenser outlet pipe of a refrigeration cycle or passing through a condenser, and a fluctuation range of the condensation temperature detected by the temperature detector. the a T 1 ...... T written by dividing the n memory ▲ 1 ▼, this indicator T 1 corresponding to the ...... T n condenser rotational speed n 1 ...... n n of the fan memory ▲ 2 ▼ consists of a A configuration in which the detection information of the temperature detector is compared with a memory (1), and the rotation speed of the condenser fan is controlled by a memory (2) corresponding to the memory (1). The number of rotations of the condenser fan at the start of the operation of the refrigeration cycle is started from a level lower than the number of rotations corresponding to the condensing temperature T C (Claim 2), and the number of rotations of the condenser fan N 1. n overlap each other (Claim 3).
[0008]
According to the present invention configured as described above, the number of revolutions of the condenser fan is selected in accordance with the temperature of the condenser outlet pipe or the temperature of the air that has passed through the condenser. Since the cooling capacity is changed by changing the number of revolutions while the condenser fan is continuously operated, there is no time lag, so the condensing pressure increases and the load is applied to the compressor, resulting in a problem of shortening the service life or shortening the service life. Is resolved.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to FIGS. A temperature detector 12 is installed at an outlet pipe of the condenser 11, and information of the temperature detector 12 is compared with a memory (T 1 ... T 6 ), and the information is collated with a memory (N 1 ... N 6 ). Then, a voltage corresponding to a predetermined rotation speed is supplied to the brushless motor 13.
[0010]
Setting conditions when starting the refrigerator, starting from a low rotational speed speed corresponding to the condensation temperature T C detected by the temperature detector. For example, when T 4 ≧ T c ≧ T 3 , the corresponding rotation speeds are N 3 and N 4 , but start from the rotation speed N 3 to increase the power saving effect.
[0011]
Referring to FIG. 2, the sections (N 1 ... N 6 ) of the number of rotations of the condenser fan overlap the temperature sections (T 1 ... T 6 ). This is because when transitioning from a high temperature section to a low temperature section sequentially (arrow), or when sequentially transitioning from a low temperature section to a high temperature section (arrow), the transition destination is almost in the middle of the set range and the transition is smooth. It is considered so that it can be done.
[0012]
When starting with N 3 as described above whether the detected value of the temperature detector 12 becomes T 4> T c, the temperature T is T 4 ≧ the outlet pipe of the condenser 11 by the rotation of the brushless motor 13 (condenser fan) either balanced by T ≧ T 3, or at either of the temperature is lowered T <T 3.
[0013]
In this case, the destination is a smooth transition since the overlap when the temperature shifts to N 4 rises. Also, when moving to N 2 down temperature of the outlet pipe of the condenser 11 by the rotation of the fan 13 the destination is transferred and controlled smoothly so overlap.
[0014]
In the above-described embodiment, the brushless motor 13 is employed. However, a variable speed motor using known frequency control, voltage control, and current control may be employed. In the above embodiment, the temperature detector is provided at the outlet pipe of the condenser, but the temperature of the air passing through the condenser may be measured.
[0015]
【The invention's effect】
As described above, according to the present invention, since the number of rotations of the condenser fan is selected in accordance with the temperature of the condenser outlet pipe, appropriate air is blown, so that power can be saved. There is no time lag because the rotation speed is changed, so that there is no problem that the condensing pressure rises and a load is applied to the compressor to cause a failure or shorten the life.
[Brief description of the drawings]
FIG. 1 is a control flow of a condenser fan according to the present invention. FIG. 2 is a control explanatory diagram of the condenser fan. FIG. 3 (a) is a control circuit diagram of a conventional condenser fan (part 1).
(B) Control circuit diagram of conventional condenser fan (part 2)
[Explanation of symbols]
11 Condenser 12 Temperature detector 13 Brushless motor 32 Relay 33 Power switch CPR Refrigerant gas compressor CFM Condenser fan motor

Claims (3)

冷凍サイクルの凝縮器出口配管の、または凝縮器を通過した空気の温度を測定する温度検出器と、上記温度検出器にて検出した凝縮温度の変動範囲をT1 ……Tn に区分して書き込んだメモリー▲1▼と、この区分T1 ……Tn に対応する凝縮器ファンの回転数N1 ……Nn のメモリー▲2▼とからなり、上記温度検出器の検出情報をメモリー▲1▼と照合し、メモリー▲1▼に対応するメモリー▲2▼により回転数を制御する凝縮器ファン制御機構。A temperature detector that measures the temperature of the air at the condenser outlet pipe of the refrigeration cycle or that has passed through the condenser, and a fluctuation range of the condensation temperature detected by the temperature detector are divided into T 1 ... T n. It consists of the written memory (1) and the memory (2) of the number of rotations N 1 ... N n of the condenser fan corresponding to the divisions T 1 ... T n. A condenser fan control mechanism that controls the number of revolutions by memory (2) corresponding to memory (1) by comparing with (1). 上記冷凍サイクルの運転開始は、凝縮温度TC に対応する回転数より低いレベルからスタートするようにした請求項1に記載の凝縮器ファン制御機構。Operation start of the refrigeration cycle, the condenser fan control mechanism according to claim 1 which is adapted to start from a level lower than the rotation speed corresponding to the condensation temperature T C. 上記凝縮器ファンの回転数N1 ……Nn は、互いにオーバーラップさせている凝縮器ファン制御機構。The condenser fan speeds N 1 ... N n are overlapped with each other by a condenser fan control mechanism.
JP2002201047A 2002-07-10 2002-07-10 Condenser fan control mechanism Pending JP2004044868A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1807664A4 (en) * 2004-10-28 2010-12-22 Emerson Retail Services Inc Condenser fan control system
EP1873467A3 (en) * 2004-10-28 2010-12-22 Emerson Retail Services INC. Variable speed condenser fan control system
JP2012078077A (en) * 2010-10-06 2012-04-19 Hoshizaki Electric Co Ltd Refrigerating device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1807664A4 (en) * 2004-10-28 2010-12-22 Emerson Retail Services Inc Condenser fan control system
EP1873467A3 (en) * 2004-10-28 2010-12-22 Emerson Retail Services INC. Variable speed condenser fan control system
US8051668B2 (en) 2004-10-28 2011-11-08 Emerson Retail Services, Inc. Condenser fan control system
JP2012078077A (en) * 2010-10-06 2012-04-19 Hoshizaki Electric Co Ltd Refrigerating device

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