FR2671413A1 - Temperature regulating process for machine cooler - Google Patents
Temperature regulating process for machine cooler Download PDFInfo
- Publication number
- FR2671413A1 FR2671413A1 FR9100196A FR9100196A FR2671413A1 FR 2671413 A1 FR2671413 A1 FR 2671413A1 FR 9100196 A FR9100196 A FR 9100196A FR 9100196 A FR9100196 A FR 9100196A FR 2671413 A1 FR2671413 A1 FR 2671413A1
- Authority
- FR
- France
- Prior art keywords
- liquid
- machine
- temperature
- valve
- probe
- 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.)
- Withdrawn
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Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1919—Control of temperature characterised by the use of electric means characterised by the type of controller
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Temperature (AREA)
Abstract
Description
La présente invention concerne un procédé de régulation de la température pour un dispositif de refroidissement de machine. The present invention relates to a temperature control method for a machine cooling device.
Le dispositif de refroidissement est composé d'une pompe et d'une machine frigorifique. Le refroidissement est assuré par l'intermédiaire d'un liquide circulant entre le refroidisseur et la machine à refroidir. The cooling device consists of a pump and a refrigerating machine. Cooling is ensured by means of a liquid circulating between the cooler and the cooling machine.
La régulation de la température de la machine à refroidir se fait actuellement par la variation de la température du liquide. L'inconvénient de ce procédé est le temps de reponse proportionnel à la longueur des tuyauteries de liaison. The temperature of the cooling machine is currently regulated by varying the temperature of the liquid. The disadvantage of this process is the response time proportional to the length of the connecting pipes.
La régulation de la température par la variation du débit du liquide permet un temps de réponse pratiquement instantané
Ce procédé a deux inconvénients. Le premier est le suivant. Pour une charge thermique nulle le débit va être nul et la circulation va se bloquer. En effet, le contrôle de la tem pérature se fait par l'intermédiaire du liquide, la sonde est placée à la sortie de la machine car il est souvent impossible de monter la sonde directement sur les pièces à refroidir
Celles-ci peuvent subir des chocs ou être animées, ou simplement pour des raisons d'encombrement.The regulation of the temperature by the variation of the liquid flow allows an almost instantaneous response time
This process has two drawbacks. The first is the following. For a zero thermal load the flow will be zero and the circulation will block. Indeed, the temperature control is done through the liquid, the probe is placed at the outlet of the machine because it is often impossible to mount the probe directly on the parts to be cooled
These can be shocked or animated, or simply for reasons of space.
Le deuxième inconvénient est que le faible brassage du liquide peut créer des températures différentes dans la machine à refroidir. The second drawback is that the weak mixing of the liquid can create different temperatures in the cooling machine.
La régulation de la température combinée à la régulation du débit permettrait de réaliser un compromis, malheureusement il risque d'apparaître un phénomène d'oscillation d'une valeur par rapport à l'autre si les deux systèmes sont indépendants. The regulation of the temperature combined with the regulation of the flow would make it possible to achieve a compromise, unfortunately it is likely to appear a phenomenon of oscillation of a value compared to the other if the two systems are independent.
Les particularités du procédé selon l'invention permettant de remédier à ces inconvénients sont les suivantes. The features of the method according to the invention which make it possible to remedy these drawbacks are the following.
Un seul régulateur mesure la température en un endroit unique et la compare à la valeur de consigne. A single controller measures the temperature in a single location and compares it to the setpoint.
Ce régulateur pilote simultanément l'organe de réglage du débit et l'organe de réglage de la température. This regulator simultaneously controls the flow control member and the temperature control member.
Une sonde de limitation agit sur l'organe de réglage de la température pour éviter que celle-ci ne dépasse la valeur de consigne. A limitation probe acts on the temperature adjustment device to prevent it from exceeding the set value.
Un débit minimum est maintenu permettant un brassage suffisant du liquide et une mesure de la température du liquide par une sonde simple placée à la sortie de la machine à refroidir. A minimum flow rate is maintained allowing sufficient mixing of the liquid and a measurement of the temperature of the liquid by a simple probe placed at the outlet of the cooling machine.
La figure 1 illustre le principe de fonctionnement. Figure 1 illustrates the operating principle.
Une pompe (1) fait circuler le liquide dans l'échangeur de chaleur appelé évaporateur (2) où la température du liquide est abaissée proportionnellement à la charge thermique. A pump (1) circulates the liquid in the heat exchanger called the evaporator (2) where the temperature of the liquid is lowered in proportion to the thermal load.
Le liquide est ensuite envoyé dans la machine (13) celleci est refroidie en cédant sa chaleur au liquide qui s 'chaud fe et retourne au refroidisseur. The liquid is then sent to the machine (13), which is cooled by transferring its heat to the liquid which heats up and returns to the cooler.
Une vanne trois voies (3) pilotée par le régulateur module le débit du liquide proportionnellement à la charge thermique. A three-way valve (3) controlled by the regulator modulates the flow of the liquid in proportion to the thermal load.
La vanne manuelle (4) réglée à la mise en service maintien le débit minimum. The manual valve (4) set during commissioning maintains the minimum flow.
La vanne manuelle (5) réglée à la mise en service équilibre les pertes de charge du circuit pour permettre un fonctionnement stable de la pompe. The manual valve (5) adjusted during commissioning balances the pressure drops in the circuit to allow stable operation of the pump.
Le refroidissement du liquide est obtenu par un système frigorifique composé de l'évaporateur (2) où le fluide frigorigène s'évapore en prenant la chaleur du liquide. Un comprésseur (6) aspire comprime et refoule les vapeurs de fluide frigorigène au condenseur (7) où celles-ci sont liquéfiées en cédant leurs chaleurs à l'eau de refroidissement dont l'en trée (16) et la sortie (17) sont raccordées à un réseau extérieur. La vanne de régulation préssostatique (9) maintien une préssion de condensation suffisante en modulant le débit d'eau de refroidissement extérieur. Un détendeur (8) contrôle l'injection de fluide frigorigène liquide dans l'évaporateur. The cooling of the liquid is obtained by a refrigeration system composed of the evaporator (2) where the refrigerant evaporates taking the heat from the liquid. A compressor (6) sucks compresses and discharges the refrigerant vapors to the condenser (7) where these are liquefied by yielding their heat to the cooling water whose inlet (16) and outlet (17) are connected to an external network. The presostatic control valve (9) maintains sufficient condensation pressure by modulating the flow of external cooling water. A pressure reducer (8) controls the injection of liquid refrigerant into the evaporator.
La vanne d'injection de gaz chaud (10) pilotée par le regulateur module la puissance frigorifique de O à 100%. The hot gas injection valve (10) controlled by the regulator modulates the cooling capacity from 0 to 100%.
La réduction de puissance s'éffectue par augmentation du titre de vapeur du mélange liquide-vapeur. The reduction in power is effected by increasing the vapor titer of the liquid-vapor mixture.
Le régulateur compare en permanence la température du liquide mesurée par la sonde (12) placée à la sortie de la machine à la température de consigne. La sonde de limitation (11) n'agit que sur la vanne d'injection de gaz chaud. The regulator constantly compares the temperature of the liquid measured by the probe (12) placed at the outlet of the machine with the set temperature. The limitation probe (11) only acts on the hot gas injection valve.
Le procédé selon l'invention est particulièrement destiné aux refroidisseurs des machines outils de l'industrie des matières plastiques. The method according to the invention is particularly intended for coolers of machine tools in the plastics industry.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9100196A FR2671413A1 (en) | 1991-01-09 | 1991-01-09 | Temperature regulating process for machine cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9100196A FR2671413A1 (en) | 1991-01-09 | 1991-01-09 | Temperature regulating process for machine cooler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2671413A1 true FR2671413A1 (en) | 1992-07-10 |
Family
ID=9408549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9100196A Withdrawn FR2671413A1 (en) | 1991-01-09 | 1991-01-09 | Temperature regulating process for machine cooler |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2671413A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0681903A1 (en) * | 1994-04-15 | 1995-11-15 | FRIGEL FIRENZE S.r.l. | Thermal conditioning system for a plant with several machines having individual conditioning and/or cooling requirements |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3859812A (en) * | 1974-03-08 | 1975-01-14 | Richard B Pavlak | Methods and apparatus for treating machine tool coolants |
| GB2173886A (en) * | 1985-03-14 | 1986-10-22 | Mitsubishi Corp | Thermal energy storage and discharge system |
| US4769998A (en) * | 1986-04-25 | 1988-09-13 | Advantage Electronics, Incorporated | Precision-controlled water chiller |
| DE8812140U1 (en) * | 1988-09-26 | 1988-11-10 | I.E.C.I. di Frat. Inverardi Pierluigi e Mauro S.n.c., Passirano, Brescia | Control device for thermoregulation of moulds and presses used for processing plastic material or metal |
| GB2233080A (en) * | 1989-03-08 | 1991-01-02 | Star Refrigeration | Refrigeration apparatus |
-
1991
- 1991-01-09 FR FR9100196A patent/FR2671413A1/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3859812A (en) * | 1974-03-08 | 1975-01-14 | Richard B Pavlak | Methods and apparatus for treating machine tool coolants |
| GB2173886A (en) * | 1985-03-14 | 1986-10-22 | Mitsubishi Corp | Thermal energy storage and discharge system |
| US4769998A (en) * | 1986-04-25 | 1988-09-13 | Advantage Electronics, Incorporated | Precision-controlled water chiller |
| DE8812140U1 (en) * | 1988-09-26 | 1988-11-10 | I.E.C.I. di Frat. Inverardi Pierluigi e Mauro S.n.c., Passirano, Brescia | Control device for thermoregulation of moulds and presses used for processing plastic material or metal |
| GB2233080A (en) * | 1989-03-08 | 1991-01-02 | Star Refrigeration | Refrigeration apparatus |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0681903A1 (en) * | 1994-04-15 | 1995-11-15 | FRIGEL FIRENZE S.r.l. | Thermal conditioning system for a plant with several machines having individual conditioning and/or cooling requirements |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |