JPH03164659A - Refrigerator - Google Patents
RefrigeratorInfo
- Publication number
- JPH03164659A JPH03164659A JP2286794A JP28679490A JPH03164659A JP H03164659 A JPH03164659 A JP H03164659A JP 2286794 A JP2286794 A JP 2286794A JP 28679490 A JP28679490 A JP 28679490A JP H03164659 A JPH03164659 A JP H03164659A
- Authority
- JP
- Japan
- Prior art keywords
- evaporator
- compressor
- cooling
- temperature
- evaporation 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2117—Temperatures of an evaporator
- F25B2700/21171—Temperatures of an evaporator of the fluid cooled by the evaporator
- F25B2700/21173—Temperatures of an evaporator of the fluid cooled by the evaporator at the outlet
Landscapes
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明はコンピュータ冷却用冷却水供給装置に使用さ
れる冷凍装置の如く、冷却負荷の冷却温度を常に一定に
保つように運転される冷凍装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a refrigeration system that is operated to keep the cooling temperature of a cooling load constant at all times, such as a refrigeration system used in a cooling water supply system for cooling a computer. Regarding.
この種の冷却水供給装置として第２図に示すものが知ら
れている。図において、圧縮機１、凝縮器２、膨張弁３
および蒸発器４は配管５で接続されて閉じた冷媒回路を
構成し、この冷媒回路内を冷媒としてフロンが循環する
。７は圧力センサ８によって圧縮機１の吸込側圧力を検
出し、圧縮機１に内蔵する圧縮機モータの回転数を制御
するインバータ、１０は冷却部が蒸発器４内を通るよう
に配設され冷却負荷として蒸発器４によって冷却される
冷却水が循環する水配管である。As this type of cooling water supply device, one shown in FIG. 2 is known. In the figure, compressor 1, condenser 2, expansion valve 3
The evaporator 4 and the evaporator 4 are connected by a pipe 5 to form a closed refrigerant circuit, and fluorocarbon is circulated as a refrigerant in this refrigerant circuit. 7 is an inverter that detects the suction side pressure of the compressor 1 using a pressure sensor 8 and controls the rotation speed of a compressor motor built in the compressor 1; This is a water pipe through which cooling water cooled by the evaporator 4 circulates as a cooling load.
上記冷凍装置は、蒸発器４を流れる冷媒との熱交換によ
って前記冷却水を冷却する。かつ熱交換後圧縮機ｌに送
り込まれる冷媒の圧力に基づいて圧縮機１の運転が制御
され、蒸発器４に送り込まれる冷媒量が調節される。こ
れにより冷却前の冷却水の温度に大きな変動があっても
、この冷却水を常に一定温度に冷却するようになされて
いる。The refrigeration system cools the cooling water through heat exchange with the refrigerant flowing through the evaporator 4. The operation of the compressor 1 is controlled based on the pressure of the refrigerant sent to the compressor 1 after heat exchange, and the amount of refrigerant sent to the evaporator 4 is adjusted. As a result, even if there are large fluctuations in the temperature of the cooling water before cooling, the cooling water is always cooled to a constant temperature.
ところで上記圧縮機１は圧縮機モータの回転数を下げ過
ぎると軸受潤滑等に支障を生じる。このために従来の冷
凍装置はインバータによる負荷制御の下限を全負荷時の
５０％負荷として圧縮機１が運転されており、前記冷却
前の冷却水がこの下限以下の冷却負荷即ち比較的低温で
あったり流量が少ないと冷え過ぎとなり、冷却後の冷却
水が所定温度以下に低くなる欠点があった。By the way, in the compressor 1, if the rotation speed of the compressor motor is lowered too much, bearing lubrication etc. will be affected. For this reason, in conventional refrigeration systems, the compressor 1 is operated with the lower limit of load control by the inverter being 50% of the full load, and the cooling water before cooling is under the cooling load below this lower limit, that is, at a relatively low temperature. If the flow rate is too high or the flow rate is low, it will become too cold and the cooling water after cooling will have a disadvantage of dropping below a predetermined temperature.
この発明は圧縮機１の運転における下限を保持しなから
尚それ以下の冷却負荷においても一定温度に冷却可能な
冷凍装置を提供することを目的とする。It is an object of the present invention to provide a refrigeration system that maintains the lower limit of operation of the compressor 1 and is capable of cooling to a constant temperature even under a cooling load lower than the lower limit.
上記目的を達成するために、この発明によれば、圧縮機
、凝縮器および蒸発器を結んで冷媒回路を構成し、かつ
前記圧縮機の吸込圧力を検出して圧縮機モータをインバ
ータによって制御する冷凍装置において、前記蒸発器の
出口側に、冷却負荷の冷却温度を検出して蒸発器の蒸発
圧力を制御する蒸発圧力調整弁を設けるもとする。In order to achieve the above object, according to the present invention, a compressor, a condenser, and an evaporator are connected to form a refrigerant circuit, and the suction pressure of the compressor is detected to control the compressor motor by an inverter. In the refrigeration system, an evaporation pressure regulating valve is provided on the outlet side of the evaporator to detect the cooling temperature of the cooling load and control the evaporation pressure of the evaporator.
冷却負荷がインバータによる圧縮機の制御下限以下の低
負荷になると、蒸発圧力調整弁が圧縮機への冷媒流入量
を絞り蒸発器の蒸発圧力を高めて、蒸発器による熱交換
を抑制する。これにより前記冷却負荷も一定温度に冷却
される。When the cooling load becomes a low load below the lower limit of control of the compressor by the inverter, the evaporation pressure regulating valve throttles the amount of refrigerant flowing into the compressor, increases the evaporation pressure of the evaporator, and suppresses heat exchange by the evaporator. Thereby, the cooling load is also cooled to a constant temperature.
第１図はこの発明の実施例を示すもので、第２図と共通
あるいは同一の部分は同じ符号で示す。FIG. 1 shows an embodiment of the invention, and parts common or identical to those in FIG. 2 are designated by the same reference numerals.
第１図において、１１は蒸発器４により冷却された冷却
水の温度を検出するように水配管１０の蒸発器出口側に
設置された温度センサ、１２は温度センサ１１の検出温
度により作動し、冷媒を蒸発器４から圧縮機１へ送る配
管５の途中に介挿設置され、冷媒の流量を加減する蒸発
圧力調整弁である。In FIG. 1, 11 is a temperature sensor installed on the evaporator outlet side of the water pipe 10 to detect the temperature of the cooling water cooled by the evaporator 4; 12 is activated by the temperature detected by the temperature sensor 11; This is an evaporation pressure regulating valve that is inserted in the middle of the pipe 5 that sends the refrigerant from the evaporator 4 to the compressor 1, and adjusts the flow rate of the refrigerant.
前述の構成において、インバータ７による圧縮機１の制
御範囲においては、蒸発圧力調整弁１２は開放状態にあ
り、蒸発器４に送り込まれる冷却水の温度および流量即
ち冷却負荷に対応して圧縮機１が運転制御され、凝縮器
２および膨張弁３を通して適当量の冷媒が蒸発器４に送
り込まれ前記冷却水は一定温度に冷却されて蒸発器４か
ら送り出される。In the above configuration, within the control range of the compressor 1 by the inverter 7, the evaporation pressure regulating valve 12 is in an open state, and the compressor 1 is adjusted in response to the temperature and flow rate of the cooling water sent to the evaporator 4, that is, the cooling load. The operation of the refrigerant is controlled, an appropriate amount of refrigerant is sent to the evaporator 4 through the condenser 2 and the expansion valve 3, and the cooling water is cooled to a constant temperature and sent out from the evaporator 4.
前記冷却水の冷却負荷が圧縮機１の制御範囲以下になる
と、蒸発器４から送り出される冷却水の温度が前述の如
く所定温度より低くなる。この温度低下を温度センサ１
１が検知し蒸発圧力調整弁１２がその流路を絞る。これ
によって蒸発器４の蒸発圧力が上昇し、かつ冷媒の流量
が減少する。When the cooling load of the cooling water falls below the control range of the compressor 1, the temperature of the cooling water sent out from the evaporator 4 becomes lower than the predetermined temperature as described above. Temperature sensor 1 detects this temperature drop.
1 is detected, and the evaporation pressure regulating valve 12 throttles the flow path. As a result, the evaporation pressure of the evaporator 4 increases and the flow rate of the refrigerant decreases.
従って圧縮機１が制御範囲の下限状態で運転されながら
、冷媒と冷却水との熱交換が小さな冷却負荷に対応して
抑制され、冷却後の冷却水は一定温度に保持される。Therefore, while the compressor 1 is operated at the lower limit of the control range, heat exchange between the refrigerant and the cooling water is suppressed in response to a small cooling load, and the cooling water after cooling is maintained at a constant temperature.
この発明によれば、蒸発器の出口側に、冷却負荷の冷却
温度を検出して蒸発器の蒸発圧力は制御する蒸発圧力調
整弁を設けるようにしたので、インバータによる圧縮機
の制御範囲以下の冷却負荷に対しても、前記蒸発圧力調
整弁による蒸発器の制御によって冷却温度を一定温度に
制御することができる。即ち一定温度に冷却することの
できる冷却負荷の範囲が拡大され冷凍装置の有効性が高
められる。According to this invention, an evaporation pressure regulating valve is provided on the outlet side of the evaporator to detect the cooling temperature of the cooling load and control the evaporation pressure of the evaporator. Even with respect to the cooling load, the cooling temperature can be controlled to a constant temperature by controlling the evaporator using the evaporation pressure regulating valve. That is, the range of cooling loads that can be cooled to a constant temperature is expanded, and the effectiveness of the refrigeration system is increased.
第１図はこの発明の実施例を示す冷凍装置の冷媒回路図
、第２図は従来のものの冷媒回路図である。
１・・・圧縮機、２・・・凝縮器、３・・・膨張弁、４
・・・蒸発器、７・・・インバータ、１０・・・水配管
（冷却負荷）、１２・・・蒸発圧力調整弁。
第１図
第２図FIG. 1 is a refrigerant circuit diagram of a refrigeration system showing an embodiment of the present invention, and FIG. 2 is a refrigerant circuit diagram of a conventional one. 1... Compressor, 2... Condenser, 3... Expansion valve, 4
... Evaporator, 7... Inverter, 10... Water piping (cooling load), 12... Evaporation pressure adjustment valve. Figure 1 Figure 2
Claims (1)
成し、かつ前記圧縮機の吸込圧力を検出して圧縮機モー
タをインバータによって制御する冷凍装置において、前
記蒸発器の出口側に、冷却負荷の冷却温度を検出して蒸
発器の蒸発圧力を制御する蒸発圧力調整弁を設けたこと
を特徴とする冷凍装置。1) In a refrigeration system that connects a compressor, a condenser, and an evaporator to form a refrigerant circuit, detects the suction pressure of the compressor, and controls the compressor motor by an inverter, on the outlet side of the evaporator, A refrigeration system characterized by being provided with an evaporation pressure regulating valve that detects the cooling temperature of a cooling load and controls the evaporation pressure of an evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2286794A JP2501947B2 (en) | 1990-10-24 | 1990-10-24 | Refrigeration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2286794A JP2501947B2 (en) | 1990-10-24 | 1990-10-24 | Refrigeration equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03164659A true JPH03164659A (en) | 1991-07-16 |
| JP2501947B2 JP2501947B2 (en) | 1996-05-29 |
Family
ID=17709129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2286794A Expired - Lifetime JP2501947B2 (en) | 1990-10-24 | 1990-10-24 | Refrigeration equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2501947B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008101884A (en) * | 2006-10-20 | 2008-05-01 | Mitsubishi Heavy Ind Ltd | Heat source machine, heat source system and control method of heat source machine |
| JP2012229838A (en) * | 2011-04-25 | 2012-11-22 | Taikisha Ltd | Fluid cooling means and fluid cooling device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59219657A (en) * | 1983-05-26 | 1984-12-11 | 株式会社日本自動車部品総合研究所 | Controller for refrigerant circuit |
| JPS6068356U (en) * | 1983-10-14 | 1985-05-15 | 株式会社ボッシュオートモーティブ システム | Automotive air conditioner |
-
1990
- 1990-10-24 JP JP2286794A patent/JP2501947B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59219657A (en) * | 1983-05-26 | 1984-12-11 | 株式会社日本自動車部品総合研究所 | Controller for refrigerant circuit |
| JPS6068356U (en) * | 1983-10-14 | 1985-05-15 | 株式会社ボッシュオートモーティブ システム | Automotive air conditioner |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008101884A (en) * | 2006-10-20 | 2008-05-01 | Mitsubishi Heavy Ind Ltd | Heat source machine, heat source system and control method of heat source machine |
| JP2012229838A (en) * | 2011-04-25 | 2012-11-22 | Taikisha Ltd | Fluid cooling means and fluid cooling device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2501947B2 (en) | 1996-05-29 |
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