JP2002286307A - Refrigerator - Google Patents
RefrigeratorInfo
- Publication number
- JP2002286307A JP2002286307A JP2001088009A JP2001088009A JP2002286307A JP 2002286307 A JP2002286307 A JP 2002286307A JP 2001088009 A JP2001088009 A JP 2001088009A JP 2001088009 A JP2001088009 A JP 2001088009A JP 2002286307 A JP2002286307 A JP 2002286307A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- refrigerant
- evaporator
- hermetic
- intermediate pressure
- 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.)
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Links
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- Applications Or Details Of Rotary Compressors (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、密閉型圧縮機を用
いた冷凍装置に関する。The present invention relates to a refrigeration system using a hermetic compressor.
【０００２】[0002]
【従来の技術】従来、冷凍装置で用いられる冷媒とし
て、フロン冷媒が用いられているが、当該冷媒には、塩
素基が含まれておりオゾン層の破壊原因であることが判
明しており、これに代わる冷媒として、自然冷媒である
二酸化炭素冷媒の利用がある。2. Description of the Related Art Freon refrigerant has conventionally been used as a refrigerant used in a refrigeration system. It has been found that the refrigerant contains a chlorine group and causes ozone layer destruction. As an alternative refrigerant, there is utilization of a carbon dioxide refrigerant which is a natural refrigerant.
【０００３】一般に、冷媒の圧縮部が１段の密閉型圧縮
機は、電動機部を冷却するために圧縮した冷媒ガスを密
閉容器内に吐出し、外部へ吐出する構造であり、密閉容
器内圧力は吐出圧力となる。[0003] Generally, a hermetic-type compressor having a single-stage refrigerant compression section has a structure in which refrigerant gas compressed to cool an electric motor section is discharged into a closed vessel and discharged to the outside. Is the discharge pressure.
【０００４】二酸化炭素冷媒を冷凍装置で使用した場
合、フロン冷媒よりも高い動作圧力を必要とするため、
密閉型圧縮機の密閉容器内の圧力が高くなる。When a carbon dioxide refrigerant is used in a refrigeration system, it requires a higher operating pressure than a chlorofluorocarbon refrigerant.
The pressure in the sealed container of the sealed compressor increases.
【０００５】そこで、この密閉型圧縮機の密閉容器内の
圧力を低減させるため、複数段の圧縮部を有する密閉型
圧縮機で、密閉型圧縮機の密閉容器内の圧力を、吸込圧
力と吐出圧力との中間圧力としたものがある。[0005] In order to reduce the pressure in the hermetic container of the hermetic compressor, the hermetic compressor having a plurality of stages of compression sections is used to reduce the pressure in the hermetic container of the hermetic compressor by the suction pressure and discharge pressure. Some pressures are intermediate pressures.
【０００６】また、この種の冷凍装置では、冷媒の熱を
利用して給湯可能にした冷媒対水熱交換器を備えたもの
がある。Some refrigeration systems of this type include a refrigerant-to-water heat exchanger that can supply hot water by utilizing the heat of the refrigerant.
【０００７】[0007]
【発明が解決しようとする課題】しかし、例えば冷凍装
置に備えた冷媒対水熱交換器の給水温度や外気温度が高
くなると、密閉型圧縮機への冷媒の吸込圧力が上昇し、
密閉型圧縮機の密閉容器内の圧力が高くなる。これが高
くなると、保護機構の動作によって密閉型圧縮機の運転
が停止するという問題がある。However, for example, when the supply water temperature or the outside air temperature of the refrigerant-to-water heat exchanger provided in the refrigeration system increases, the suction pressure of the refrigerant into the hermetic compressor increases,
The pressure in the sealed container of the sealed compressor increases. When this becomes high, there is a problem that the operation of the hermetic compressor is stopped by the operation of the protection mechanism.
【０００８】本発明の目的は、上述の事情を考慮してな
されたものであり、密閉型圧縮機の密閉容器内の圧力が
所定圧力を超えて高くなることを防止して、連続的に運
転することができる密閉型圧縮機を用いた冷凍装置を提
供することにある。An object of the present invention has been made in view of the above circumstances, and prevents the pressure in a closed vessel of a hermetic compressor from becoming higher than a predetermined pressure, thereby enabling continuous operation. It is an object of the present invention to provide a refrigeration apparatus using a hermetic compressor capable of performing the above-mentioned operations.
【０００９】[0009]
【課題を解決するための手段】請求項１に記載の発明
は、密閉容器内に、吸込冷媒を吸込圧力から中間圧力に
圧縮する前段圧縮部とこの前段圧縮部からの前記中間圧
力の冷媒を吐出圧力に圧縮する後段圧縮部とからなる圧
縮部を有し、前記密閉容器内の圧力が前記中間圧力と等
しく設定された密閉型圧縮機と、蒸発器と、この蒸発器
へ送風する蒸発器用ファンとを備えた冷凍装置におい
て、前記中間圧力を検出する圧力検出装置と、この圧力
検出装置により検出した前記中間圧力が所定圧力に達し
たとき、前記蒸発器へ送風する前記蒸発器用ファンの送
風量を制御し、前記吸込圧力を低下させる制御装置とを
備えたことを特徴とするものである。According to a first aspect of the present invention, a pre-compressor for compressing a suction refrigerant from a suction pressure to an intermediate pressure and a refrigerant at the intermediate pressure from the pre-compressor are provided in a closed container. A hermetic compressor having a compression section consisting of a post-compression section for compressing to a discharge pressure, wherein the pressure in the closed vessel is set equal to the intermediate pressure, an evaporator, and an evaporator for blowing air to the evaporator In a refrigerating apparatus provided with a fan, a pressure detecting device for detecting the intermediate pressure, and a supply of the evaporator fan for blowing to the evaporator when the intermediate pressure detected by the pressure detecting device reaches a predetermined pressure. A control device for controlling the air volume and reducing the suction pressure.
【００１０】請求項１に記載の発明には、次の作用があ
る。The invention described in claim 1 has the following operation.
【００１１】密閉型圧縮機の密閉容器内の中間圧力が所
定圧力に達したとき、密閉型圧縮機に吸い込まれる冷媒
の吸込圧力を低下させることにより、密閉容器内の中間
圧力を低下させ、密閉容器内の中間圧力が所定圧力を超
えて高くなることを防ぐ。When the intermediate pressure in the hermetic container of the hermetic compressor reaches a predetermined pressure, the intermediate pressure in the hermetic container is reduced by reducing the suction pressure of the refrigerant sucked into the hermetic compressor. The intermediate pressure in the container is prevented from rising above a predetermined pressure.
【００１２】請求項２に記載の発明は、密閉容器内に電
動機部を有し、この電動機部により駆動され、吸込冷媒
を吸込圧力から中間圧力に圧縮する前段圧縮部とこの前
段圧縮部からの前記中間圧力の冷媒を吐出圧力に圧縮す
る後段圧縮部とからなる圧縮部を有し、前記密閉容器内
の圧力が前記中間圧力と等しく設定された密閉型圧縮機
を備えた冷凍装置において、前記中間圧力を検出する圧
力検出装置と、この圧力検出装置により検出した前記中
間圧力が所定圧力に達したとき、冷凍能力を低下させる
制御装置とを備えたことを特徴とするものである。According to a second aspect of the present invention, an electric motor section is provided in the closed vessel, and the electric motor section is driven by the electric motor section to compress the suction refrigerant from the suction pressure to the intermediate pressure. A refrigerating apparatus including a hermetic compressor having a compression section including a second-stage compression section that compresses the intermediate-pressure refrigerant to a discharge pressure, and wherein the pressure in the hermetic container is set equal to the intermediate pressure. It is characterized by comprising a pressure detecting device for detecting an intermediate pressure, and a control device for reducing the refrigerating capacity when the intermediate pressure detected by the pressure detecting device reaches a predetermined pressure.
【００１３】請求項２に記載の発明には、次の作用があ
る。The second aspect of the invention has the following operation.
【００１４】密閉型圧縮機の密閉容器内の中間圧力が所
定圧力に達したとき、冷凍能力を低下させ、密閉型圧縮
機に吸い込まれる冷媒の吸込圧力を低下させることによ
り、密閉容器内の中間圧力を低下させ、密閉容器内の中
間圧力が所定圧力を超えて高くなることを防ぐ。When the intermediate pressure in the hermetic container of the hermetic compressor reaches a predetermined pressure, the refrigeration capacity is reduced, and the suction pressure of the refrigerant sucked into the hermetic compressor is reduced to thereby reduce the intermediate pressure in the hermetic container. The pressure is reduced to prevent the intermediate pressure in the closed vessel from increasing above a predetermined pressure.
【００１５】請求項３に記載の発明は、請求項２に記載
の発明において、前記密閉型圧縮機からの高圧冷媒と外
部からの給水とを熱交換する冷媒対水熱交換器と、前記
冷媒対水熱交換器で熱交換した後の冷媒を膨張する膨張
弁と、前記冷媒対水熱交換器の給水の流量を調整する流
量調整弁とを備え、前記圧力検出装置により検出した前
記中間圧力が所定圧力に達したとき、前記制御装置が、
前記密閉型圧縮機の前記電動機部の回転数制御と、前記
膨張弁の弁開度制御と、前記流量調整弁による前記冷媒
対水熱交換器の給水の流量制御との少なくとも一の制御
を行い、前記冷凍能力を低下させることを特徴とするも
のである。According to a third aspect of the present invention, in the second aspect of the invention, there is provided a refrigerant-to-water heat exchanger for exchanging heat between high-pressure refrigerant from the hermetic compressor and external water supply; An expansion valve for expanding the refrigerant after heat exchange with the water-to-water heat exchanger, and a flow control valve for adjusting the flow rate of the supply water of the refrigerant-to-water heat exchanger, wherein the intermediate pressure detected by the pressure detection device When the pressure reaches a predetermined pressure, the control device:
Performs at least one control of rotation speed control of the electric motor unit of the hermetic compressor, valve opening degree control of the expansion valve, and flow rate control of the supply water of the refrigerant to the water heat exchanger by the flow rate adjustment valve. The refrigeration capacity is reduced.
【００１６】請求項３に記載の発明には、次の作用があ
る。The third aspect of the invention has the following effects.
【００１７】密閉型圧縮機の密閉容器内の中間圧力が所
定圧力に達したとき、制御装置により、密閉型圧縮機の
電動機部の回転数と、膨張弁の弁開度と、冷媒対水熱交
換器の給水の流量との少なくとも一の制御を行うことに
より、冷凍能力を低下させ、密閉型圧縮機に吸い込まれ
る冷媒の吸込圧力を低下させることにより、密閉容器内
の中間圧力を低下させ、密閉容器内の中間圧力が所定圧
力を超えて高くなることを防ぐ。When the intermediate pressure in the hermetic container of the hermetic compressor reaches a predetermined pressure, the control device controls the number of rotations of the electric motor portion of the hermetic compressor, the opening degree of the expansion valve, the refrigerant and the water heat. By performing at least one control with the flow rate of the feedwater of the exchanger, the refrigeration capacity is reduced, and the suction pressure of the refrigerant sucked into the hermetic compressor is reduced, thereby reducing the intermediate pressure in the hermetic container, The intermediate pressure in the closed vessel is prevented from exceeding a predetermined pressure and increasing.
【００１８】請求項４に記載の発明は、請求項１乃至請
求項３のいずれかに記載の発明において、前記冷媒が、
二酸化炭素冷媒であることを特徴とするものである。According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the refrigerant comprises:
It is a carbon dioxide refrigerant.
【００１９】請求項４に記載の発明には、次の作用があ
る。The invention described in claim 4 has the following operation.
【００２０】冷媒として、フロン冷媒よりも高い動作圧
力を必要とする二酸化炭素冷媒を用いた場合において、
密閉型圧縮機の密閉容器内の中間圧力が所定圧力に達し
たとき、密閉型圧縮機に吸い込まれる冷媒の吸込圧力を
低下させることにより、密閉容器内の中間圧力を低下さ
せ、密閉容器内の中間圧力が所定圧力を超えて高くなる
ことを防ぐ。In the case where a carbon dioxide refrigerant requiring a higher operating pressure than a Freon refrigerant is used as the refrigerant,
When the intermediate pressure in the hermetic container of the hermetic compressor reaches a predetermined pressure, the intermediate pressure in the hermetic container is reduced by reducing the suction pressure of the refrigerant sucked into the hermetic compressor. The intermediate pressure is prevented from rising above a predetermined pressure.
【００２１】[0021]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００２２】なお、本発明の実施の形態にかかる冷凍装
置では、冷媒として自然冷媒である二酸化炭素冷媒を用
いる場合について説明する。In the refrigerating apparatus according to the embodiment of the present invention, a case will be described in which a carbon dioxide refrigerant which is a natural refrigerant is used as the refrigerant.
【００２３】〔Ａ〕第１の実施の形態 図１は、本発明の第１の実施の形態にかかる冷凍装置の
冷媒回路図である。[A] First Embodiment FIG. 1 is a refrigerant circuit diagram of a refrigeration apparatus according to a first embodiment of the present invention.
【００２４】１は冷凍装置を示し、この冷凍装置１は、
冷媒を圧縮する密閉型圧縮機２、冷媒と水とを熱交換さ
せる冷媒対水熱交換器３、冷媒を膨張させる膨張弁４、
冷媒と外気等とを熱交換させる蒸発器５、冷媒の気液分
離を行うアキュムレータ６を有してなる。蒸発器５には
送風する蒸発器用ファン７が隣接して配置されている。Reference numeral 1 denotes a refrigeration apparatus, and this refrigeration apparatus 1
A hermetic compressor 2 for compressing the refrigerant, a refrigerant-to-water heat exchanger 3 for exchanging heat between the refrigerant and water, an expansion valve 4 for expanding the refrigerant,
It has an evaporator 5 for exchanging heat between the refrigerant and the outside air and the like, and an accumulator 6 for performing gas-liquid separation of the refrigerant. An evaporator fan 7 for blowing air is disposed adjacent to the evaporator 5.
【００２５】また、この冷凍装置１は、密閉型圧縮機２
の密閉容器内の圧力を検出する圧力検出装置８を有して
おり、この圧力検出装置８の検出結果を受け、蒸発器用
ファン７の送風量を制御する制御装置９が設けられてい
る。この圧力検出装置８は、圧力センサである。The refrigerating device 1 is a closed type compressor 2
And a control device 9 for receiving the detection result of the pressure detection device 8 and controlling the amount of air blown by the evaporator fan 7. The pressure detecting device 8 is a pressure sensor.
【００２６】密閉型圧縮機２は、図２に示すように、密
閉容器１０を有し、その密閉容器１０の内部には、電動
機部１１と、圧縮部１２とを備えている。圧縮部１２
は、前段圧縮部１３と後段圧縮部１４とからなる。前段
圧縮部１３には冷媒の吸込口１３ａと、冷媒の吐出口１
３ｂと、冷媒を密閉容器１０の内部に吐出する吐出口１
３ｃとが設けられ、後段圧縮部１４には冷媒の吸込口１
４ａと吐出口１４ｂとが設けられている。前段圧縮部１
３の吐出口１３ｂと後段圧縮部１４の吸込口１４ａとは
接続配管１５により接続されている。前段圧縮部１３の
吸込口１３ａには、圧縮する冷媒を吸込む吸込配管１６
が設けられ、この吸込口１３ａには吸込配管１６を介し
てアキュムレータ６が接続されている。As shown in FIG. 2, the hermetic compressor 2 has a hermetic container 10, and an electric motor section 11 and a compressing section 12 are provided inside the hermetic container 10. Compression unit 12
Is composed of a first-stage compression unit 13 and a second-stage compression unit 14. The front-stage compression section 13 has a refrigerant suction port 13a and a refrigerant discharge port 1a.
3b and a discharge port 1 for discharging a refrigerant into the closed container 10
3c, and the refrigerant inlet 1
4a and a discharge port 14b are provided. Pre-stage compression unit 1
The third discharge port 13b and the suction port 14a of the rear compression section 14 are connected by a connection pipe 15. A suction pipe 16 for sucking the refrigerant to be compressed is provided at a suction port 13a of the first-stage compression section 13.
The accumulator 6 is connected to the suction port 13a via a suction pipe 16.
【００２７】後段圧縮部１４の吐出口１４ｂには圧縮し
た冷媒を吐出する吐出配管１７が設けられている。密閉
容器１０には冷媒を排出するための通路配管１８の一端
１８ａが接続され、この通路配管１８の他端１８ｂが接
続配管１５に接続されている。A discharge pipe 17 for discharging the compressed refrigerant is provided at a discharge port 14b of the rear compression section 14. One end 18a of a passage pipe 18 for discharging the refrigerant is connected to the sealed container 10, and the other end 18b of the passage pipe 18 is connected to the connection pipe 15.
【００２８】前段圧縮部１３の吸込口１３ａから吸い込
まれる冷媒は、前段圧縮部１３によって圧縮され、この
圧縮された冷媒は前段圧縮部１３の吐出口１３ｂ、１３
ｃより吐出される。前段圧縮部１３の吸込口１３ａより
吐出された冷媒は、接続配管１５を介し、後段圧縮部１
４の吸込口１４ａから吸込まれ、この後段圧縮部１４に
よって圧縮され、吐出口１４ｂより吐出される。The refrigerant sucked from the suction port 13a of the pre-compressor 13 is compressed by the pre-compressor 13, and the compressed refrigerant is discharged from the outlets 13b, 13 of the pre-compressor 13.
c. The refrigerant discharged from the suction port 13a of the first-stage compression section 13 passes through the connection pipe 15 and passes through the second-stage compression section 1
4 is sucked through the suction port 14a, is compressed by the rear compression unit 14, and is discharged from the discharge port 14b.
【００２９】密閉容器１０の内部は、吐出口１３ｃによ
り吐出された冷媒によって、吸込圧力Ｐ１と吐出圧力Ｐ
２の中間圧力Ｐ３となり、この中間圧力Ｐ３の冷媒は、
通路配管１８より排出され、接続配管１５を介し、後段
圧縮部１４へ送られる。The inside of the closed container 10 is filled with the suction pressure P1 and the discharge pressure P by the refrigerant discharged from the discharge port 13c.
2, and the refrigerant at the intermediate pressure P3 is:
The gas is discharged from the passage pipe 18 and sent to the rear compression unit 14 via the connection pipe 15.
【００３０】上記構成において、例えば夏季では、冷媒
対水熱交換器３の給水温度および外気温度が高くなる。
或いはいずれか一方の温度が高くなる。この状態で、冷
凍装置１を運転した場合、密閉型圧縮機２への冷媒の吸
込圧力Ｐ１は上昇し、前段圧縮部１３で圧縮された冷媒
の中間圧力Ｐ３が上昇する。In the above configuration, for example, in summer, the supply water temperature and the outside air temperature of the refrigerant-to-water heat exchanger 3 increase.
Alternatively, one of the temperatures increases. When the refrigeration apparatus 1 is operated in this state, the suction pressure P1 of the refrigerant into the hermetic compressor 2 increases, and the intermediate pressure P3 of the refrigerant compressed in the first-stage compression section 13 increases.
【００３１】通常、この中間圧力Ｐ３が上昇すると、密
閉圧縮機２の保護機構（図示せず）が動作して密閉型圧
縮機２の運転を停止させる。Normally, when the intermediate pressure P3 increases, a protection mechanism (not shown) of the hermetic compressor 2 operates to stop the operation of the hermetic compressor 2.
【００３２】本実施形態では、圧力検出装置８である圧
力センサにより中間圧力Ｐ３が検出され、その中間圧力
Ｐ３がある所定圧力に達したとき、制御装置９により蒸
発器５に送風される蒸発器用ファン７の送風量が低減さ
れ、密閉型圧縮機２への冷媒の吸込圧力Ｐ１が低下し、
密閉型圧縮機２の密閉容器１０の中間圧力Ｐ３が吸込圧
力Ｐ１に比例して所定圧力以下に低下する。In the present embodiment, the intermediate pressure P3 is detected by the pressure sensor which is the pressure detecting device 8, and when the intermediate pressure P3 reaches a certain predetermined pressure, the evaporator 5 is blown to the evaporator 5 by the control device 9. The amount of air blown by the fan 7 is reduced, the suction pressure P1 of the refrigerant into the hermetic compressor 2 is reduced,
The intermediate pressure P3 of the hermetic container 10 of the hermetic compressor 2 drops below a predetermined pressure in proportion to the suction pressure P1.
【００３３】従って、密閉型圧縮機２の密閉容器１０の
圧力が所定圧力を超えて高くなることが防止される。よ
って、密閉型圧縮機２の保護機構（図示せず）が動作し
て運転を停止させることがなく、密閉型圧縮機２を用い
た冷凍装置１を連続的に運転することができる。Accordingly, it is possible to prevent the pressure in the closed casing 10 of the closed type compressor 2 from becoming higher than a predetermined pressure. Therefore, the refrigerating apparatus 1 using the hermetic compressor 2 can be continuously operated without stopping the operation by the protection mechanism (not shown) of the hermetic compressor 2 operating.
【００３４】〔Ｂ〕第２の実施の形態 図３は、本発明の第２の実施の形態にかかる冷凍装置の
冷媒回路図である。この第２の実施の形態において、前
記第１の実施の形態と同様な部分は、同一の符号を付す
ことにより説明を省略する。[B] Second Embodiment FIG. 3 is a refrigerant circuit diagram of a refrigeration apparatus according to a second embodiment of the present invention. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
【００３５】５０は第２の実施の形態の冷凍装置を示
す。この冷凍装置５０において、冷媒対水熱交換器３の
排水側には流量調整弁１９が接続される。Reference numeral 50 denotes a refrigeration apparatus according to the second embodiment. In the refrigeration system 50, the flow control valve 19 is connected to the drain side of the refrigerant-to-water heat exchanger 3.
【００３６】密閉容器１０の内部の圧力を検出する圧力
検出装置８である圧力センサにより中間圧力Ｐ３が検出
される。この検出結果に応じて、密閉型圧縮機２の電動
機部１１の回転数制御と、膨張弁４の弁開度制御と、流
量調整弁１９による冷媒対水熱交換器３の水の流量制御
とを行う制御装置２０が設けられている。The intermediate pressure P3 is detected by a pressure sensor which is a pressure detecting device 8 for detecting the pressure inside the closed vessel 10. In accordance with this detection result, control of the rotation speed of the electric motor unit 11 of the hermetic compressor 2, control of the opening degree of the expansion valve 4, control of the flow rate of the refrigerant to the water-to-water heat exchanger 3 by the flow rate control valve 19, and so on are performed. Is provided.
【００３７】本実施形態では、密閉型圧縮機２への冷媒
の吸込圧力Ｐ１が上昇したとき、前段圧縮部１３で圧縮
された冷媒の中間圧力Ｐ３も上昇する。中間圧力Ｐ３が
ある所定圧力に達したとき、電動機部１１の回転数を低
下させる制御と、膨張弁４の弁を開く制御と、流量調整
弁１９による水の流量を低下させる制御との少なくとも
一の制御が制御装置２０により行われる。これによって
冷凍能力が低下する。In the present embodiment, when the suction pressure P1 of the refrigerant into the hermetic compressor 2 increases, the intermediate pressure P3 of the refrigerant compressed by the pre-compressor 13 also increases. When the intermediate pressure P3 reaches a certain predetermined pressure, at least one of a control for reducing the rotation speed of the electric motor unit 11, a control for opening the valve of the expansion valve 4, and a control for reducing the flow rate of water by the flow control valve 19 is performed. Is performed by the control device 20. This reduces the refrigeration capacity.
【００３８】冷凍能力の低下を効果的にするには、電動
機部１１の回転数を低下させる制御と、膨張弁４の弁を
開く制御と、流量調整弁１９による水の流量を低下させ
る制御とを制御装置２０により同時に行うことが望まし
い。In order to effectively reduce the refrigeration capacity, control for reducing the number of revolutions of the electric motor section 11, control for opening the expansion valve 4, and control for reducing the flow rate of water by the flow control valve 19 are required. Is desirably performed simultaneously by the control device 20.
【００３９】このように冷凍能力を低下させることによ
って吸込圧力Ｐ１も低下し、密閉型圧縮機２の密閉容器
１０の中間圧力Ｐ３も所定圧力以下に低下する。By reducing the refrigeration capacity in this manner, the suction pressure P1 also decreases, and the intermediate pressure P3 of the closed casing 10 of the closed type compressor 2 also drops below a predetermined pressure.
【００４０】従って、これによっても、密閉型圧縮機２
の密閉容器１０の圧力が所定圧力を超えて高くなること
が防止される。よって、密閉型圧縮機２の保護機構（図
示せず）が動作して運転を停止させることがなく、密閉
型圧縮機２を用いた冷凍装置１を連続的に運転すること
ができる。Therefore, this also enables the hermetic compressor 2
Is prevented from exceeding the predetermined pressure. Therefore, the refrigerating apparatus 1 using the hermetic compressor 2 can be continuously operated without stopping the operation by the protection mechanism (not shown) of the hermetic compressor 2 operating.
【００４１】以上、一実施の形態に基づいて本発明を説
明したが、本発明はこれに限定されるものではない。Although the present invention has been described based on one embodiment, the present invention is not limited to this.
【００４２】[0042]
【発明の効果】本発明では、密閉型圧縮機の密閉容器の
圧力が所定圧力を超えて高くなることを防止して、密閉
型圧縮機の運転を停止させることなく、密閉型圧縮機を
用いた冷凍装置を連続的に運転することができる。According to the present invention, the hermetic compressor can be used without stopping the hermetic compressor without stopping the operation of the hermetic compressor by preventing the pressure in the hermetic container of the hermetic compressor from exceeding a predetermined pressure. Refrigeration equipment can be operated continuously.
【図１】本発明に係る冷凍装置の第１の実施の形態を示
す回路図である。FIG. 1 is a circuit diagram showing a first embodiment of a refrigeration apparatus according to the present invention.
【図２】密閉型圧縮機の断面図である。FIG. 2 is a cross-sectional view of the hermetic compressor.
【図３】本発明に係る冷凍装置の第２の実施の形態を示
す回路図である。FIG. 3 is a circuit diagram showing a refrigeration apparatus according to a second embodiment of the present invention.
１ 冷凍装置 ２ 密閉型圧縮機 ３ 冷媒対水熱交換器 ４ 膨張弁 ５ 蒸発器 ６ アキュムレータ ７ 蒸発器用ファン ８ 圧力検出装置 ９ 制御装置 １０ 密閉容器 １１ 電動機部 １２ 圧縮部 １３ 前段圧縮部 １３ａ 吸込口 １３ｂ 吐出口 １３ｃ 吐出口 １４ 後段圧縮部 １４ａ 吸込口 １４ｂ 吐出口 １９ 流量調整弁 ２０ 制御装置 ５０ 冷凍装置 DESCRIPTION OF SYMBOLS 1 Refrigeration apparatus 2 Hermetic compressor 3 Refrigerant-water heat exchanger 4 Expansion valve 5 Evaporator 6 Accumulator 7 Fan for evaporator 8 Pressure detector 9 Control device 10 Hermetic container 11 Electric motor part 12 Compressor part 13 Front compression part 13a Suction port 13b Discharge port 13c Discharge port 14 Rear compression unit 14a Suction port 14b Discharge port 19 Flow control valve 20 Control device 50 Refrigeration device
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｆ２５Ｂ 1/00 ３８３ Ｆ２５Ｂ 1/00 ３８３ ３９５ ３９５Ｚ 39/02 39/02 Ｚ (72)発明者 小山 清 栃木県足利市大月町１番地 三洋電機空調 株式会社内 (72)発明者 遠谷 義徳 栃木県足利市大月町１番地 三洋電機空調 株式会社内 (72)発明者 式地 千明 栃木県足利市大月町１番地 三洋電機空調 株式会社内 (72)発明者 斉藤 正信 栃木県足利市大月町１番地 三洋電機空調 株式会社内 (72)発明者 石垣 茂弥 栃木県足利市大月町１番地 三洋電機空調 株式会社内 Ｆターム(参考） 3H029 AA04 AA09 AA13 AB03 BB51 CC26 CC27 CC52 CC62 3H045 AA05 AA15 AA27 BA20 CA02 DA04 EA13 EA26 EA42 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) F25B 1/00 383 F25B 1/00 383 395 395Z 39/02 39/02 Z (72) Inventor Kiyoshi Koyama Tochigi No. 1, Otsuki-cho, Ashikaga-shi, Pref. Sanyo Electric Air Conditioning Co., Ltd. (72) Inventor Yoshinori Toya No. 1, Otsuki-cho, Ashikaga, Tochigi Pref., Sanyo Electric Air Conditioning Co., Ltd. (72) Inventor Chiaki Chiaki Otsuki, Tochigi Pref. No. 1 Sanyo Electric Air Conditioning Co., Ltd. (72) Inventor Masanobu Saito 1 Otsukimachi, Ashikaga City, Tochigi Prefecture Sanyo Electric Air Conditioning Co., Ltd. (72) Inventor Shigeya Ishigaki 1 Otsukicho, Ashikaga City, Tochigi Sanyo Electric Air Conditioning F term (reference) 3H029 AA04 AA09 AA13 AB03 BB51 CC26 CC27 CC52 CC62 3H045 AA05 AA15 AA27 BA20 CA02 DA04 EA13 EA26 EA42
Claims (4)
中間圧力に圧縮する前段圧縮部とこの前段圧縮部からの
前記中間圧力の冷媒を吐出圧力に圧縮する後段圧縮部と
からなる圧縮部を有し、前記密閉容器内の圧力が前記中
間圧力と等しく設定された密閉型圧縮機と、 蒸発器と、 この蒸発器へ送風する蒸発器用ファンとを備えた冷凍装
置において、 前記中間圧力を検出する圧力検出装置と、 この圧力検出装置により検出した前記中間圧力が所定圧
力に達したとき、前記蒸発器へ送風する前記蒸発器用フ
ァンの送風量を制御し、前記吸込圧力を低下させる制御
装置とを備えたことを特徴とする冷凍装置。1. A compression unit comprising a first stage compression unit for compressing a suction refrigerant from a suction pressure to an intermediate pressure and a second stage compression unit for compressing the intermediate pressure refrigerant from the first stage compression unit to a discharge pressure in a closed container. A refrigerating apparatus comprising: a hermetic compressor in which the pressure in the closed vessel is set equal to the intermediate pressure; an evaporator; and an evaporator fan for blowing air to the evaporator. A pressure detecting device for detecting, when the intermediate pressure detected by the pressure detecting device reaches a predetermined pressure, a control device for controlling a blowing amount of the fan for the evaporator to blow the air to the evaporator and reducing the suction pressure And a refrigeration apparatus comprising:
機部により駆動され、吸込冷媒を吸込圧力から中間圧力
に圧縮する前段圧縮部とこの前段圧縮部からの前記中間
圧力の冷媒を吐出圧力に圧縮する後段圧縮部とからなる
圧縮部を有し、前記密閉容器内の圧力が前記中間圧力と
等しく設定された密閉型圧縮機を備えた冷凍装置におい
て、 前記中間圧力を検出する圧力検出装置と、 この圧力検出装置により検出した前記中間圧力が所定圧
力に達したとき、冷凍能力を低下させる制御装置とを備
えたことを特徴とする冷凍装置。2. A closed-stage container having an electric motor section, driven by the electric motor section, for compressing a suction refrigerant from a suction pressure to an intermediate pressure, and discharging the intermediate-pressure refrigerant from the front-stage compression section. A refrigerating apparatus having a compression unit including a compression unit configured to be compressed to a pressure and a subsequent-stage compression unit, and including a hermetic-type compressor in which the pressure in the hermetic container is set to be equal to the intermediate pressure; A refrigerating device comprising: a device; and a control device that reduces a refrigerating capacity when the intermediate pressure detected by the pressure detecting device reaches a predetermined pressure.
からの給水とを熱交換する冷媒対水熱交換器と、前記冷
媒対水熱交換器で熱交換した後の冷媒を膨張する膨張弁
と、前記冷媒対水熱交換器の給水の流量を調整する流量
調整弁とを備え、 前記圧力検出装置により検出した前記中間圧力が所定圧
力に達したとき、前記制御装置が、前記密閉型圧縮機の
前記電動機部の回転数制御と、前記膨張弁の弁開度制御
と、前記流量調整弁による前記冷媒対水熱交換器の給水
の流量制御との少なくとも一の制御を行い、前記冷凍能
力を低下させることを特徴とする請求項２記載の冷凍装
置。3. A refrigerant-to-water heat exchanger for exchanging heat between the high-pressure refrigerant from the hermetic-type compressor and water supplied from outside, and an expansion for expanding the refrigerant after heat exchange in the refrigerant-to-water heat exchanger. A valve, and a flow rate adjusting valve for adjusting a flow rate of water supplied to the refrigerant-to-water heat exchanger. When the intermediate pressure detected by the pressure detecting device reaches a predetermined pressure, the control device is configured to be the closed type. Performing at least one of control of the number of revolutions of the motor unit of the compressor, control of the opening degree of the expansion valve, and control of the flow rate of the supply water of the refrigerant to the water heat exchanger by the flow rate control valve; The refrigeration apparatus according to claim 2, wherein the capacity is reduced.
を特徴とする請求項１乃至請求項３のいずれかに記載の
冷凍装置。4. The refrigeration apparatus according to claim 1, wherein the refrigerant is a carbon dioxide refrigerant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001088009A JP4756205B2 (en) | 2001-03-26 | 2001-03-26 | Refrigeration equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001088009A JP4756205B2 (en) | 2001-03-26 | 2001-03-26 | Refrigeration equipment |
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|---|---|
| JP2002286307A true JP2002286307A (en) | 2002-10-03 |
| JP4756205B2 JP4756205B2 (en) | 2011-08-24 |
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ID=18943166
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001088009A Expired - Fee Related JP4756205B2 (en) | 2001-03-26 | 2001-03-26 | Refrigeration equipment |
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| Country | Link |
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| WO2012092274A1 (en) * | 2010-12-30 | 2012-07-05 | Scherer John S | Refrigeration system controlled by refrigerant quality within evaporator |
| US9791188B2 (en) | 2014-02-07 | 2017-10-17 | Pdx Technologies Llc | Refrigeration system with separate feedstreams to multiple evaporator zones |
| GB2546586B (en) * | 2015-11-19 | 2020-05-20 | G A H Refrigeration Ltd | Method and system for controlling performance of an evaporator of a refrigeration system |
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|---|---|---|---|---|
| JP4678642B2 (en) * | 2001-03-26 | 2011-04-27 | 三洋電機株式会社 | Refrigeration equipment |
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| US8646286B2 (en) | 2010-12-30 | 2014-02-11 | Pdx Technologies Llc | Refrigeration system controlled by refrigerant quality within evaporator |
| US10365018B2 (en) | 2010-12-30 | 2019-07-30 | Pdx Technologies Llc | Refrigeration system controlled by refrigerant quality within evaporator |
| US9791188B2 (en) | 2014-02-07 | 2017-10-17 | Pdx Technologies Llc | Refrigeration system with separate feedstreams to multiple evaporator zones |
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| GB2546586B (en) * | 2015-11-19 | 2020-05-20 | G A H Refrigeration Ltd | Method and system for controlling performance of an evaporator of a refrigeration system |
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