SE467592B - DEVICE FOR ASTAD ACCOMMODATION OF A MINIMUM FLOW OF COOLING MEDIUM TO A DRIVER IN A COOL OR HEAT PUMP SYSTEM - Google Patents
DEVICE FOR ASTAD ACCOMMODATION OF A MINIMUM FLOW OF COOLING MEDIUM TO A DRIVER IN A COOL OR HEAT PUMP SYSTEMInfo
- Publication number
- SE467592B SE467592B SE9003920A SE9003920A SE467592B SE 467592 B SE467592 B SE 467592B SE 9003920 A SE9003920 A SE 9003920A SE 9003920 A SE9003920 A SE 9003920A SE 467592 B SE467592 B SE 467592B
- Authority
- SE
- Sweden
- Prior art keywords
- expansion valve
- connection
- valve
- heat pump
- pump system
- Prior art date
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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
-
- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/04—Refrigeration circuit bypassing means
- F25B2400/0411—Refrigeration circuit bypassing means for the expansion valve or capillary tube
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Temperature-Responsive Valves (AREA)
- Air-Conditioning For Vehicles (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Description
35 467 592 2 sammans ventilens öppningsgrad beroende på förångarens råd- ande fyllningstillstånd och ger bästa möjliga utnyttjande för varje driftsfall. 35 467 592 2 together the degree of opening of the valve depending on the prevailing filling condition of the evaporator and provides the best possible utilization for each operating case.
Redogörelse för uppfinningen För att undvika att en expansionsventil i ett kyl- eller värmepumpsystem förblir i stängt läge på grund av låg bulbtemperatur, där flera kylbatterier/föràngare med expan- sionsventiler är parallellt anordnade och där det råder väsentligen konstant subtryck och där således ventilstängning ej påverkar sugtrycket i systemet, har anordnats en förbind- else med reglerbar genomströmningsarea över expansionsven- tilen mellan högtryckssidan och lågtryckssidan, vilken för- bindelse garanterar att en minsta mängd köldmedium förångas i förångaren för att ge en överhettad gas för uppvärmning av en bulb förbunden med expansionsventilen. Efter ventilens stäng- ning kommer således bulben att erhålla viss uppvärmning på grund av att en minsta mängd köldmedium förångas i förångaren under alstrande av överhettad gas, vilket medför att expan- sionsventilen åter öppnas.Disclosure of the invention In order to avoid an expansion valve in a cooling or heat pump system remaining in the closed position due to low bulb temperature, where several cooling batteries / evaporators with expansion valves are arranged in parallel and where there is a substantially constant negative pressure and thus valve closing does not affect suction pressure in the system, a connection has been provided with an adjustable flow area over the expansion valve between the high pressure side and the low pressure side, which connection guarantees that a minimum amount of refrigerant is evaporated in the evaporator to give an overheated gas for heating a bulb connected to the expansion valve. After the valve is closed, the bulb will thus receive some heating due to a minimum amount of refrigerant evaporating in the evaporator while generating superheated gas, which means that the expansion valve is reopened.
Figurframställning Fig. 1 - 3 visar olika utföringsformer av förbind- elsen över expansionsventilen enligt uppfinningen.Figure representation Figures 1 - 3 show different embodiments of the connection over the expansion valve according to the invention.
Fig. 4 visar ett exempel på ett system med flera parallellt ordnade förångare med expansionsventiler enligt uppfinningen.Fig. 4 shows an example of a system with several parallel-arranged evaporators with expansion valves according to the invention.
Beskrivning av utföringsexempel I figur 1 visas en konventionell termostatisk expansionsventil 1 i ett kylsystem med förångare 2, bulb 3, avstängningsventil 4. Mellan högtryckssidan och lågtrycks- sidan i systemet har en förbindelseledning 5 anordnats. Denna förbindelse kan vara anordnad med ett reglerbart genomström- ningstvärsnitt eller kan den vara försedd med en utbytbar strypningsfunktion. Med denna förbindelse 5 garanteras att en minsta mängd köldmedium alltid kan passera förbi expansions- ventilen när ventilen 4 är öppen och kompressorn i systemet är i drift. Om expansionsventilen 1 skulle stänga kommer således en viss mängd köldmedium att förbiledas och förångas 10 15 20 25 30 35 467 59-2 3 i förångaren, vilket ger överhettad gas för uppvärmning av bulben 3, vilket i sin tur medför att expansionsventilen åter öppnar.Description of exemplary embodiments Figure 1 shows a conventional thermostatic expansion valve 1 in a cooling system with evaporator 2, bulb 3, shut-off valve 4. A connecting line 5 has been arranged between the high-pressure side and the low-pressure side of the system. This connection may be provided with an adjustable flow cross-section or it may be provided with a replaceable throttling function. With this connection 5 it is guaranteed that a minimum amount of refrigerant can always pass the expansion valve when the valve 4 is open and the compressor in the system is in operation. Thus, should the expansion valve 1 close, a certain amount of refrigerant will be bypassed and evaporated in the evaporator, giving superheated gas to heat the bulb 3, which in turn causes the expansion valve to reopen.
I figur 2 och 3 visas alternativa förbiledningsför- bindelser för minsta mängd köldmedium enligt uppfinningen. I figur 2 visas hur ett hål 6 är gjort i ventilsätet 7 till expansionsventilen 1. Diametern på hålet väljes med hänsyn till expansionsventilens konstruktionsprestanda. Hålet kan även förses med en reglerbar strypning eller förses med ut- bytbara strypbrickor. I figur 3 visas hur en kanal 7 eller liknande har gjorts i ventilkäglan 9. Även här väljes dimensionerna på kanalen 8 med hänsyn till expansionsven- tilens konstruktionsprestanda eller kan kanaltvärsnittet anordnas reglerbart.Figures 2 and 3 show alternative bypass compounds for the least amount of refrigerant according to the invention. Figure 2 shows how a hole 6 is made in the valve seat 7 of the expansion valve 1. The diameter of the hole is chosen with regard to the design performance of the expansion valve. The hole can also be fitted with an adjustable throttle or provided with replaceable throttle washers. Figure 3 shows how a duct 7 or the like has been made in the valve cone 9. Here, too, the dimensions of the duct 8 are selected with regard to the design performance of the expansion valve or the duct cross-section can be arranged adjustably.
I fig. 4 visas förenklat hur flera parallellt anordnade förángare med expansionsventiler är anordnade. Om bulben 3 känner en temperatursänkning kommer expansionsven- tilen i systemet att stänga. Då sugtrycket i hela systemet är väsentligen konstant kommer ventilen att förbli stängd. Men genom att en minsta mängd köldmedium förbiledes expansions- ventilen kommer en viss mängd köldmedium att förångas, vilket medför en uppvärmning av bulben 3 och öppning av expansions-A ventilen 1.Fig. 4 shows in a simplified manner how several parallel evaporators with expansion valves are arranged. If the bulb 3 senses a temperature drop, the expansion valve in the system will close. When the suction pressure in the entire system is substantially constant, the valve will remain closed. However, by bypassing the expansion valve with a minimum amount of refrigerant, a certain amount of refrigerant will evaporate, which causes the bulb 3 to heat up and the expansion A valve 1 to open.
Claims (4)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9003920A SE467592B (en) | 1990-12-07 | 1990-12-07 | DEVICE FOR ASTAD ACCOMMODATION OF A MINIMUM FLOW OF COOLING MEDIUM TO A DRIVER IN A COOL OR HEAT PUMP SYSTEM |
PCT/SE1991/000823 WO1992010710A1 (en) | 1990-12-07 | 1991-12-03 | A method and arrangement for producing minimum refrigerant flows |
AU89351/91A AU8935191A (en) | 1990-12-07 | 1991-12-03 | A method and arrangement for producing minimum refrigerant flows |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9003920A SE467592B (en) | 1990-12-07 | 1990-12-07 | DEVICE FOR ASTAD ACCOMMODATION OF A MINIMUM FLOW OF COOLING MEDIUM TO A DRIVER IN A COOL OR HEAT PUMP SYSTEM |
Publications (3)
Publication Number | Publication Date |
---|---|
SE9003920D0 SE9003920D0 (en) | 1990-12-07 |
SE9003920L SE9003920L (en) | 1992-06-08 |
SE467592B true SE467592B (en) | 1992-08-10 |
Family
ID=20381134
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE9003920A SE467592B (en) | 1990-12-07 | 1990-12-07 | DEVICE FOR ASTAD ACCOMMODATION OF A MINIMUM FLOW OF COOLING MEDIUM TO A DRIVER IN A COOL OR HEAT PUMP SYSTEM |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU8935191A (en) |
SE (1) | SE467592B (en) |
WO (1) | WO1992010710A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006060099A1 (en) * | 2006-12-18 | 2008-06-19 | Otto Egelhof Gmbh & Co. Kg | Thermostatic expansion valve |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2077865A (en) * | 1934-03-15 | 1937-04-20 | Detroit Lubricator Co | Refrigerating system |
US2228834A (en) * | 1940-01-13 | 1941-01-14 | Gen Electric | Refrigerating system |
US2709340A (en) * | 1953-10-13 | 1955-05-31 | Robert C Webber | Refrigerating system with low temperature stabilization |
US3390540A (en) * | 1966-08-16 | 1968-07-02 | Carrier Corp | Multiple evaporator refrigeration systems |
GB1461545A (en) * | 1974-06-10 | 1977-01-13 | Ford Motor Co | Air conditioning system |
JPH01230966A (en) * | 1988-03-10 | 1989-09-14 | Fuji Koki Seisakusho:Kk | Control of refrigerating system and thermostatic expansion valve |
JPH02263071A (en) * | 1988-12-09 | 1990-10-25 | Bernard Zimmern | Using method for expansion valve device and assembly of vaporizer and flow rate control means |
-
1990
- 1990-12-07 SE SE9003920A patent/SE467592B/en not_active Application Discontinuation
-
1991
- 1991-12-03 AU AU89351/91A patent/AU8935191A/en not_active Abandoned
- 1991-12-03 WO PCT/SE1991/000823 patent/WO1992010710A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
SE9003920D0 (en) | 1990-12-07 |
AU8935191A (en) | 1992-07-08 |
SE9003920L (en) | 1992-06-08 |
WO1992010710A1 (en) | 1992-06-25 |
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Legal Events
Date | Code | Title | Description |
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NAV | Patent application has lapsed |
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