SE180552C1

SE180552C1 -

Info

Publication number: SE180552C1
Authority: SE
Publication date: 1962-01-01

Description

Prioritet begdrd f ran den 5 november 1953 (Nederldnderna) Foreliggande uppfinning avser en kylanlaggning med en kallgaskylmaskin, medelst vilken ett mom ett sekundart ledningssystem befintligt varmeoverforingsmedium kondenseras, varefter kondensatet amp forangas i en forangare, varvid mediet upptar vfirme Iran det for kylning avsedda foremalet, medan den alstrade angan atervander till ledningssystemets i varmeledande forbindelse mod kallgaskylmaskinen stfiende kondensor. I delta samband menas med kallgaskylmaskin en kylmaskin, som arbetar enligt den omvanda varmgasmotorprincipen. Dessa kylmaskiner kunna vara utfOrda pa olika sail, t. ex. som en fortrangarmaskin, dubbelverkande maskin eller som maskin, vars arbetsrum am kombinerat med arbetsrummet i en varmgasmotor. Maskinerna kunna Minna kyleffekt mom ett stort temperaturomrade. Exempelvis kan man konstruera maskiner, som Minna kyleffekt vid — 40° C eller vid — 80° C eller vid — 200° C. Den av kylmaskinen alstrade kyleffekten kan medelst ett varmeoverforingsmedium overforas till det for kylning avsedda foremalet. kven vid hushallskylmaskiner anvander man ofta ett medium, som cirkulerar i ett slutet sekundart ledningssystem, varvid detta medium genom fi5rangning upptar varme av det for kylning avsedda foremalet, varefter den alstrade angan aterkondenseras. Vid sadana anlaggningar anvander man ofta s. k. freon 12 sasom medium. Vid dessa hushallskylmaskiner fir f5rangarens temperaturskillnad mellan vilo- och driftstillstand i allmänhet jamforelsevis lag, t. ex. 40° C, varvid forangarens lagsta temperatur utgor ungefar —10° C. The present invention relates to a refrigeration plant with a cold gas refrigeration machine, by means of which a heat transfer medium existing in a secondary piping system is condensed, after which the condensate is evaporated in an evaporator, the medium occupying the company intended for cooling. while the generated input returns to the condensing condenser of the line system in the heat-conducting connection towards the cold gas refrigeration machine. In this connection, a cold gas cooling machine means a cooling machine that works according to the converted hot gas engine principle. These cooling machines can be made on different sails, e.g. as a displacement machine, double-acting machine or as a machine, the working space of which is combined with the working space of a hot gas engine. The machines can reduce the cooling effect with a large temperature range. For example, machines can be designed, such as a reduced cooling effect at -40 ° C or at -80 ° C or at -200 ° C. The cooling effect generated by the cooling machine can be transferred to the form intended for cooling by means of a heat transfer medium. In household refrigeration machines, a medium is often used which circulates in a closed secondary pipe system, this medium absorbing heat from the preform intended for cooling, after which the generated steam is condensed again. In such plants, so-called freon 12 is often used as the medium. In these household refrigerators, the temperature difference between the evaporator and the operating condition is generally comparable, e.g. 40 ° C, the lowest temperature of the evaporator being approximately -10 ° C.

Om emellertid en kylanlaggning am forsedd med en vid lag temperatur arbetande kallgaskylmaskin, medan varmeoverforingen sker medelst ett koldmedium, bora pfi grund av den stora temperaturskillnaden sarskilda krav stallas pa koldmediet.ena sidan ar det nodvandigt att vid laga temperaturer, I. ex. -- 80° C eller lfigre, en tillrfickligt stor kondensatmangd forefinnes i ledningssystemet, och a andra sidan am det onskvart, att trycket i ledningssystemet, nOr kallgaskylmaskinen icke dr i drift, icke antar ett for Mgt varde. Ph grund av detta skall det sekundara ledningssystemet enligt uppfinningen innehalla ett yarmerwerforingsrnedium med en kokpunkt, som fir lagre an 20° C vid ett tryck av 20 ato, varjamte varmeOverforingsmediets mangd och ledningssystemets volym aro sO avpassade i forhallande till varandra, att hOgst en grammolekyl av varmeoverforingsmediet finnes per dm3 av ledningssystemet vid 20° C. Sasom varmeoverforingsmedium kunna anvandas t. ex. metan, elan, kva.ve samt CHF2C1. However, if a refrigeration system is equipped with a low-temperature cold gas refrigeration machine, while the heat transfer takes place by means of a refrigerant, due to the large temperature difference special requirements are placed on the refrigerant. On the one hand, it is necessary to at low temperatures, e.g. 80 ° C or less, a sufficiently large amount of condensate is present in the piping system, and on the other hand it is desirable that the pressure in the piping system, when the cold gas refrigeration machine is not in operation, does not assume a too high value. For this reason, the secondary piping system according to the invention should contain a heat transfer medium having a boiling point lower than 20 ° C at a pressure of 20 atm, and the amount of heat transfer medium and the volume of the piping system are proportional to at most one gram molecule of the heat transfer medium is present per dm3 of the pipe system at 20 ° C. As a heat transfer medium it can be used e.g. methane, elan, kva.ve and CHF2Cl.

Den till forangaren forda kondensatmangden regleras genom att kallgaskylmasldnens kyleffekt andras. Denna kyleffekt kan andras genom att kylmaskinen arbetar intermittent eller genom att atminstone en av maskinens foljande drif tstorheter Indras: varvtal, arbetsmediets tryck, fasforskjutning mellan maskinens fram- och atergaende kolvformade delar, eller maskinens skadliga rum. Kallgaskylmaskinens kyleffekt kan enligt uppfinningen regleras i beroende av kondensatmangden i ledningssystemet. The amount of condensate required for the evaporator is regulated by changing the cooling effect of the cold gas refrigerant. This cooling effect can be altered by the cooling machine operating intermittently or by indenting at least one of the following operating variables of the machine: speed, working medium pressure, phase shift between the reciprocating piston-shaped parts of the machine, or the damaged space of the machine. According to the invention, the cooling effect of the cold gas cooling machine can be regulated in dependence on the amount of condensate in the pipe system.

Ledningssystemet fOr varmeoverforingsmediet fir forsett med ett rum, som Over ett braddavlopp am forbundet med ledningssystemet pa sadant satt, att, nar vatskenivan vid braddavloppet stiger, kondensatet rinner ned i delta rum. Kondensatmangden kan exempelvis registreras medelst en flott8ranordning, varvid en mekanism kan vara anordnad, 2— — som vid stigande vatskeniva reglerar kallgaskylmaskinen pa sadant salt, att kyleffekten avtar. The pipe system for the heat transfer medium is provided with a room, which over a brad drain is connected to the pipe system in such a way that, when the water level at the brad drain rises, the condensate flows down into the delta room. The amount of condensate can be registered, for example, by means of a float device, in which case a mechanism can be provided, which in the case of rising water level regulates the cold gas cooling machine on such a salt that the cooling effect decreases.

En ytterligare ganska enkel reglering enligt uppfinningen erhaller man, nar varme tillfores det namnda rummet, sa att det i detta rum befintliga kondensatet forangas. Vid detta sail kan kallgaskylmaskinens kyleffekt forbli konstant, nar den i forangaren av varmeoverforingsmediet upptagna varmemangden andras. Varmen kan tillforas det namnda rummet pa olika salt, t. ex. medelst en elektrisk uppvarmningsanordning eller medelst ett langstrackt organ, vars ena ande her en temperatur, som är hogre an kondensatets temperatur. Denna ande kan exempelvis vara i varmeledande kontakt med fria luften. En nackdel är emellertid, att rimfrost kan uppsta ph organet, vilket medfor forsamring av varmeoverforingen. Organets namnda 'dude kan darfor enligt uppfinningen vara i varmeoverforande kontakt med kylmaskinens kylvatten, sit att uppkomst av rimfrost eller is forhindras. A further rather simple control according to the invention is obtained, when heat is supplied to the said space, so that the condensate present in this space evaporates. In this sail, the cooling effect of the cold gas refrigeration machine can remain constant when the amount of heat absorbed in the evaporator by the heat transfer medium is different. The heat can be applied to the named room on various salts, e.g. by means of an electric heating device or by means of an elongate member, one end of which has a temperature which is higher than the temperature of the condensate. This spirit can, for example, be in heat-conducting contact with the open air. A disadvantage, however, is that hoarfrost can arise in the ph organ, which entails a tightening of the heat transfer. The said dude of the member can therefore, according to the invention, be in heat-transferring contact with the cooling water of the cooling machine, so that the formation of hoarfrost or ice is prevented.

Vid kylmaskinens drift kan enligt uppfinningen ledningssystemets volym forminskas, varigenom en storre mangd vatska cirkulerar per dm3 av ledningssystemets volym. Vid maskinens stannande forstoras i O. fall ledningssystemets kubikinnehall. For detta andamal kan vid maskinens stannande ledningssystemet anslutas till ett sarskilt hjalprum medelst tvâ ledningar, air vilka den ena ãr forsedd med en backventil pa sklant sat, aft -varmeoverforingsmediet kan genom denna ledning endast passera i riktning Iran ledningssystemet till hjalprummet, medan i den andra ledningen Or anordnad en reglerbar avstangningsventil. During the operation of the cooling machine, according to the invention, the volume of the pipe system can be reduced, whereby a larger amount of liquid circulates per dm3 of the volume of the pipe system. When the machine stops, the cubic contents of the line system are enlarged in O. case. For this purpose, in the case of the machine stopping the piping system, a separate auxiliary chamber can be connected by means of two conduits, one of which is provided with a check valve on a slanting set, line Or arranged an adjustable shut-off valve.

Uppfinningen kommer att i det foljande forklaras narmare i samband med bifogade ritning. Fig. 1 visar en utforingsform, vid vilken det sekundara ledningssystemet ãr for-sett med ett ytterligare rum, i vilket tiverflodigt kondensat forangas. Fig. 2 visar en anlaggning, vid vilken det sekundara ledningssystemets volym kan forstoras genom inkoppling air ett sarskilt hjalprum, medan kallgaskylmaskinens kyleffekt kan andras genom forandring air maskinens -varvtal. The invention will be explained in more detail below in connection with the accompanying drawing. Fig. 1 shows an embodiment in which the secondary conduit system is provided with an additional space in which excess liquid condensate is evaporated. Fig. 2 shows a system in which the volume of the secondary line system can be increased by connecting to a special auxiliary space, while the cooling effect of the cold gas cooling machine can be changed by changing the speed of the air machine.

Anlaggningen enligt fig. 1 omfattar en kallgaskylmaskin 1, utford som fortrangarmaskin. Denna kallgaskylmaskin har en cylinder 2, mom vilken en fortrangarkolv 3 och en kolv 4 foras upp och ner med ungefar konstant fasskillnad. For detta andamal ar fortrangarkolven 3 medelst en vevstake 5 forbunden med en vev pa en vevaxel 6, medan kolven 4 medelst vevstakar 7 ar kopplad med en annan vev ph denna vevaxel. Rum-met 8 ovanfor fortrangarkolven 3 är maskinens frysrum, som over en koldgenerator 9, en regenerator 10 och en kylare 11 ar forbunden med ett rum 12, det s. k. kalla rummet. The plant according to Fig. 1 comprises a cold gas cooling machine 1, challenged as a displacement machine. This cold gas refrigeration machine has a cylinder 2, which a displacement piston 3 and a piston 4 are fed up and down with approximately constant phase difference. For this purpose, the displacement piston 3 is connected by means of a connecting rod 5 to a crank on a crankshaft 6, while the piston 4 is connected by means of connecting rods 7 to another crank on this crankshaft. The space 8 above the displacement piston 3 is the freezer compartment of the machine, which is connected via a cold generator 9, a regenerator 10 and a cooler 11 to a space 12, the so-called cold space.

Kylmaskinen drives av en elektromotor 13. Koldgeneratorn 9 är omgiven ay ett rum 14, i vilket ett koldmedium kondenseras. Det alstrade kondensatet samlas i en ringformad ranna 15 och matas genom en ledning 16 medelst en pump 17 till en forangare 18. Forangaren 18 Or anordnad i ett rum 19, som skall hallas vid en lag temperatur och som utgor det for kylning avsedda foremalet. Det forangade koldmediet atervander genom en ledning 20 till rummet 14. Rummet 14 dr me-deist ett ett braddavlopp, som utgores av rannans 15 flans 21, forbundet med ett rum 22, i vilket aro anordnade ett antal flansar 23, som Oro forbundna med en stay 24 av nagot varmeledande material, t. ex. koppar. Stavens 24 nedre ande 25 stracker sig in i en ledning 26 for kylmaskinens kylvatten. Anlaggningens sekundara ledningssystem bestar alltsa av rummet 14 med rummet 22, ledningen 16, forangaren 18 och ledningen 20. The cooling machine is driven by an electric motor 13. The cold generator 9 is surrounded by a chamber 14, in which a cold medium is condensed. The generated condensate is collected in an annular gutter 15 and fed through a line 16 by means of a pump 17 to an evaporator 18. The evaporator 18 Or arranged in a room 19, which is to be kept at a low temperature and which constitutes the foremeal intended for cooling. The evaporated refrigerant returns through a conduit 20 to the chamber 14. The chamber 14 is formed by a ridge drain, which is formed by the flange 21 of the gutter 15, connected to a chamber 22, in which aro arranged a number of flanges 23, which are connected to a stay 24 of some heat-conducting material, e.g. copper. The lower end 25 of the rod 24 extends into a conduit 26 for the cooling water of the cooling machine. The secondary pipe system of the plant thus consists of the room 14 with the room 22, the pipe 16, the evaporator 18 and the pipe 20.

Kallgaskylmaskinens koldgenerator har vid denna utforingsform normalt en temperatur av exempelvis — 120° C. I ledningssystemet befinner sig ett koldmedium, vilket mid 20 atO har en koktemperatur, som Or lagre On 20° C, t. ex. metan, medan vid denna temperatur hogst 1 mol ay detta koldmedium 10- refinnes per dm3 ledningssystemvolym. Har kallgaskylmaskinens kOldgenerator vid normaldrift en temperatur av exempelvis — 120° C, sit finnes vid detta exempel hogst 16 g me-tan per dm3 ledningssystemvolym, och om denna volym Or t. ex. 10 dm3, sit utgor varmeoverfOringsmediets totalmangd mom ledningssystemet 160 g. The cold generator of the cold gas refrigerator in this embodiment normally has a temperature of, for example - 120 ° C. In the piping system there is a cold medium, which has a boiling temperature of at least 20 atO, which is stored at 20 ° C, e.g. methane, while at this temperature a maximum of 1 mol ay of this refrigerant 10- is found per dm3 of pipe system volume. If the cold generator of the cold gas cooler during normal operation has a temperature of, for example - 120 ° C, in this example there is at most 16 g of methane per dm3 of piping system volume, and if this volume Or e.g. 10 dm3, sit, the total amount of the heat transfer medium in the line system is 160 g.

Anlaggningens verkningssatt ar foljande. Innan anlaggningen sattes i gang, fylles ledningssystemet, som bestar sasom ovan namnts ay ledningarna 16 och 20, rummen 14 och 22 samt forangaren 18, med metan i en sadan mangd, att exempelvis 0,6 mol eller 9,6 g finnes per dm3 ledningssystemvolym. Trycket ledningssystemet utgor da. 14,5 atO mid 20° C. Startas nu kallgaskylmaskinen, sit lam-n ar varmeoverforingsmediet varme, varigenom dess temperatur och tryck nedsattas. Detta pagar sit lange tills jamvikt har nails mellan it ena sidan den varmemangd, som mediet lamnar i kylmaskinen, och it andra sidan den varmemangd, som mediet upptar I forangaren, varefter anlaggningen antar ett ungefar konstant drifttillstand, vid vilket me-diets temperatur och tryck aro i huvudsak oforanderliga. Om emellertid den till fOrangaren forda varmemangden skall minskas, sit skulle dels alstras en mindre angmangd, och dels kondensatmangden Okas, varvid pa grund am kylmaskinens kyleffekt kondensattemperaturen sjunker, om nagra sarskilda at-Order icke vidtas. Till foljd am fOrekomsten air rummet 22 kan emellertid varmeoverforingsmediets temperatur i huvudsak hallas konstant. Kondensatets 8verskottsmangd rin- — —3 ner namligen dâ Over flansen 21 i rummet 22, i vilket detta kondensat kommer i varmeledande kontakt med stavens 24 flansar 23. Temperaturen av denna stays nedre ande 25, som stracker sig in i kylvattenledningen 26, iir jamforelseyis hog, varigenom varrne me-deist staven tillfores kondensatet, sh att detta forangas. Den alstrade angan aterkondenseras av kallgaskylmaskinen. Enar vid denna utforingsform en del ay kondensatet icke farangas i forangaren utan annorstades, andras icke eller i huvudsak icke varmeoYerforingsmediets temperatur och tryck. The method of operation of the plant is as follows. Before the plant is started up, the pipe system, which consists as mentioned above of the pipes 16 and 20, the rooms 14 and 22 and the evaporator 18, is filled with methane in such an amount that, for example, 0.6 mol or 9.6 g are present per dm3 of pipe system volume. . The pressure line system then exits. 14.5 atO mid 20 ° C. If the cold gas cooling machine is now started, the heat transfer medium is paralyzed by heat, whereby its temperature and pressure are reduced. This lasts for a long time until the equilibrium has nails between on the one hand the heating mantle which the medium leaves in the cooling machine and on the other hand the heating mantle which the medium occupies in the evaporator, after which the plant assumes an approximately constant operating state. aro essentially immutable. However, if the amount of heat required for the precursor is to be reduced, a smaller amount of steam would be generated, and the amount of condensate would increase, whereby due to the cooling effect of the cooling machine the condensate temperature drops, if no special orders are taken. However, due to the presence of air in the space 22, the temperature of the heat transfer medium can be kept substantially constant. The excess amount of condensate flows down the flange 21 in the space 22, in which this condensate comes into heat-conducting contact with the flanges 23 of the rod 24. The temperature of the lower end 25 of this rod, which extends into the cooling water line 26, , whereby each of the rods is supplied with the condensate, so that this evaporates. The generated steam is recondensed by the cold gas cooler. In this embodiment, some of the condensate is not gasified in the evaporator but was otherwise, others not or substantially not the temperature and pressure of the heat transfer medium.

Fig. 2 visar en annan utfaringsform, varvid mot anlaggningen enligt fig. 1 svarande delar aro forsedda med samma hanyisningstecken. Anlaggningen omfattar kallgaskylmaskinen 1, medelst vilket ett varmeoverfaringsmedLium kondenseras. Det alstrade kondensatet rinner genom ledningen 16 till fOrangaren 18, som ar anordnad i rummet 19. Den alstrade Ligon atervander genom ledningen 20 till kallgaskylmaskinen och aterkondenseras. Eftersom yid detta utforande forangaren ar placerad lagre an kylmaskinens kondensorrum, behover nagon cirkulationspump joke anordnas. Fig. 2 shows another embodiment, wherein parts corresponding to the plant according to Fig. 1 are provided with the same marking characters. The plant comprises the cold gas cooling machine 1, by means of which a heat transfer medium is condensed. The generated condensate flows through the line 16 to the evaporator 18, which is arranged in the space 19. The generated Ligon returns through the line 20 to the cold gas cooling machine and is condensed again. Since this evaporator is located lower than the condenser compartment of the chiller, some circulation pump joke needs to be provided.

Ett rum 30 ar medelst ledningar 31 och 32 forbundet med ledningen 20. Ledningen 31 ar forsedd med en backventil 33, som ar anordnad pa sadant salt, att varmeaverforingsmediet endast kan passera i riktning frail ledningen 20 till rummet 30. Ledningen 32 har en avstangningsyentil 34, medelst yilken forbindelsen mellan ledningen 20 och rum- met 30 kan sparras. Dessutom liar ledningssystemet en matanordning 35, medelst vilken antingen varmeoverforingsmediets tempera- tur eller tryck kan matas. En andring av det uppmatta vardet kan Over en servomekanism 30, 37 paverka kylmaskinens kyleffekt, exempelvis genom att andra motorns 13 varytal eller genom att Andra trycket av det arbetsmedium, som cirkulerar i kallgaskylmaskinen. A chamber 30 is connected to the conduit 20 by means of conduits 31 and 32. The conduit 31 is provided with a non-return valve 33, which is arranged on such a salt that the heat transfer medium can only pass in the direction from the conduit 20 to the space 30. The conduit 32 has a shut-off valve 34 , by means of which the connection between the conduit 20 and the space 30 can be blocked. In addition, the conduit system has a feeding device 35, by means of which either the temperature or pressure of the heat transfer medium can be fed. A change in the supplied value can, via a servomechanism 30, 37, affect the cooling effect of the cooling machine, for example by increasing the speed of the second engine 13 or by changing the pressure of the working medium circulating in the cold gas cooling machine.

Anlaggningens verkningssatt ar foljande. Innan kylmaskinen sattes i gang, fylles det ledningssystem, som bestar av kylmaskinens 1 kondensorrum, ledningen 16, forangaren 18, ledningen 20 och rummet 30 samt led- ningarna 31, 32, med nagot varmeoverfo- ringsmedium, t. ex. kvave, tills ledningssystemet vid rumstemperatur innehMler hOgst 1 mol av detta medium per dm3. Samtidigt oppnas aystangningsventilen 31. Efter kallgaskylmaskinens igangsattande sjunka lik- som vid anlaggningen enligt fig. 1 varmeaver- foringsmediets temperatur och tryck sa lange, tills jamvikt racier mellan den av kylmaski- nen fran mediet upptagna varmemangden och den genom forangaren till mediet forda varmemangden. Darefter stanges ventilen 34, sa att rummet 30 endast Over backventilen 33 star i f8rbindelse med ledningssystemet. Vid detta utfarande finnes saledes under drift en stone mangd medium mom ledningssystemet fin den mangd, som med hansyn till det yid rumstemperatur i ledningssystemet tilllatna trycket skulle vara onskyart. Aystanges kallgaskylmaskinen, sá passerar en del av varme8verforingsmediet a.ven yid avstangd ventil 34 genom backventilen 33 in i rum-net 30. The method of operation of the plant is as follows. Before the cooling machine is started, the line system, which consists of the condenser chamber 1 of the cooling machine 1, the line 16, the evaporator 18, the line 20 and the chamber 30 and the lines 31, 32, is filled with some heat transfer medium, e.g. nitrogen, until the piping system at room temperature contains not more than 1 mole of this medium per dm3. At the same time, the shut-off valve 31 is opened. Then the valve 34 is closed, so that the space 30 only above the non-return valve 33 is connected to the line system. In this process there is thus during operation a stone quantity medium with the pipe system fine the quantity which, in view of the yid room temperature in the pipe system permitted pressure, would be cloudy. If the cold gas refrigeration machine is shut down, a part of the heat transfer medium also passes through the shut-off valve 34 through the non-return valve 33 into the space 30.

Om under anlaggningens drift den till fOrangaren forda varmemangden avtar, nedsattas varmeoverforingsmediets tryck och temperatur. Till foljd av matanordningen 35 och servomekanismen 36, 37 minskas kylmaskinens kyleffekt tills jamvikt fir aterstalld. I stallet far att payerka kylmaskinens yarytal kan arbetsmediets tryck inom kylmaskinen andras For detta andamal kan man am/I-Ida kanda anordningar for reglering av trycket i varmgaskolvmaskiner.If during the operation of the plant the heat supply to the precursor decreases, the pressure and temperature of the heat transfer medium are reduced. As a result of the feeding device 35 and the servomechanism 36, 37, the cooling effect of the cooling machine is reduced until equilibrium is restored. Instead of paying the yary number of the cooling machine, the pressure of the working medium within the cooling machine may change. For this purpose, devices for regulating the pressure in hot gas piston machines can be used.

Claims

Patent claim:

A cooling system with a cold gas cooling machine, by means of which a heat transfer medium present in a secondary piping system is condensed, after which the condensate is evaporated in an evaporator (18), heat being taken up from an object (19) for cooling while the corrosion is Merfores to the condenser (14) of the conductor system in heat-conducting connection with the cooling machine, characterized in that the conductor system (14, 16, 18, 20, 22) contains a heat transfer medium with a boiling point which is lower than 20 ° C at a pressure of 20 atm, each the amount of the heat transfer medium and the volume of the conduit system are so adapted in relation to each other that at most one gram molecule of the heat transfer medium is present per dm3 ay of the conduit system Yid 20 ° C.

Cooling system according to patent claim 1, characterized by devices (21-25) for regulating the cooling effect of the cold gas cooling machine 1 depending on the amount of condensate in the pipe system.

Cooling system according to claim 2, characterized in that in the conduit system for the heat transfer medium there is a special space (22), which by means of a spout drain (21) is connected to the conduit system on such a salt that the condensate runs down into the space (22), for condensate exceeds the brad drain, and there are heat conducting means (23-25) to supply heat to the room, so that the condensate in the room fOrangas.

Cooling system according to claim 3, characterized in that heat is supplied by heat conduction to the room (22) via a stay-shaped member (24), in that the temperature of one end (25) of the member (24) is higher than the temperature of the condensate.

Cooling system according to patent claim 4, characterized in that said member (25) of the member is in heat-conducting contact with the cooling water of the cold gas cooling machine.

Cooling system according to one of the preceding patent claims, characterized in that the conduit system (14, 16, 18, 20) is connected to a separate auxiliary space (30) by means of two conduits (31, 32), one of which (31 ) is provided with a non-return valve (33) on such a sail that the heat transfer medium can pass through this line (31) only in the direction of the Iran line system to the auxiliary space (30), while in the other line (32) a shut-off valve (34) is arranged ). Request publications: Patents in Germany 864 876.