CA2023483C - Separate type air-conditioner - Google Patents
Separate type air-conditionerInfo
- Publication number
- CA2023483C CA2023483C CA002023483A CA2023483A CA2023483C CA 2023483 C CA2023483 C CA 2023483C CA 002023483 A CA002023483 A CA 002023483A CA 2023483 A CA2023483 A CA 2023483A CA 2023483 C CA2023483 C CA 2023483C
- Authority
- CA
- Canada
- Prior art keywords
- air
- conditioner
- control valve
- refrigerant
- terminal
- 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.)
- Expired - Fee Related
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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/26—Refrigerant piping
- F24F1/32—Refrigerant piping for connecting the separate outdoor units to indoor units
-
- 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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/26—Disposition of valves, e.g. of on-off valves or flow control valves of fluid flow reversing valves
-
- 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
- F25B41/40—Fluid line arrangements
-
- 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
- F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
- F25B2345/002—Collecting refrigerant from a cycle
-
- 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
- F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
- F25B2345/003—Control issues for charging or collecting refrigerant to or from a cycle
-
- 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
- F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
- F25B2345/006—Details for charging or discharging refrigerants; Service stations therefor characterised by charging or discharging valves
Abstract
ABSTRACT
A separate type air-conditioner comprising an outdoor unit having elements such as a compressor, a condenser and a fan motor, an indoor unit with heat exchange means, conduit means for refrigerant supply and return and an operation mode selection switch including a plurality of terminals for air venting, refrigerant recovery and normal operation modes of the air-conditioner. The air-conditioner includes refrigerant flow control valve means provided in the conduits for selectively opening the conduits for selec-tively opening and closing the flow paths between said units, said control valve means being electrically con-nected to said terminals. Also, a plurality of relay means are electrically connected to the terminals for controlling the current flow through at least one selected terminal to the elements and valve means connected thereto.
A separate type air-conditioner comprising an outdoor unit having elements such as a compressor, a condenser and a fan motor, an indoor unit with heat exchange means, conduit means for refrigerant supply and return and an operation mode selection switch including a plurality of terminals for air venting, refrigerant recovery and normal operation modes of the air-conditioner. The air-conditioner includes refrigerant flow control valve means provided in the conduits for selectively opening the conduits for selec-tively opening and closing the flow paths between said units, said control valve means being electrically con-nected to said terminals. Also, a plurality of relay means are electrically connected to the terminals for controlling the current flow through at least one selected terminal to the elements and valve means connected thereto.
Description
FIELD OF THE INVENTION
Thi~ invention relates to a ~eparate type air-conditioner having indoor and outdoor unit~, and more particularly, to such an air-conditioner having air venting, refrigerant recovery and normal operation modes.
DESCRIPTION OF THE PRIOR ART
Ordinarily, a separate type air-conditioner i8 taken out of a manufactory with an outdoor unit charged with a large portion of the refrigerant and an indoor unit in which only a little refrigerant is charged for anti-corrosion. The indoor and outdoor units are set up at appropriate places and connected by conduits to each other.
After setting up again the air-conditioner the trapped air should be removed from the refrigerant flow paths, since the humidity contained in the trapped air is frozen and thereby causes the flow paths to be blocked or prevents the air-conditioner from smoothly operating.
Also, in the case of conveying the alr-conditioner in sections, the refrigerant should be recovered and stored in the outdoor unit before di~assembling the air-conditioner 80 as to prevent the refrigerant from flowing out exce~sively and to readily vent the trapped air from the refrigerant paths in future.
-- 1 - ~.
Conventionally, the operations for ~ecovering the refrigerant and for venting trapped air as well as reestablishment of the air-conditioner should be carried out by an operator skilled in thi~ art. Otherwise, such operations may be carried out by using such automatic apparatus as disclosed in the U.S. Patent No. 4,285,206, issued to Richard Koser, which is an additional burden to the user.
SUMMARY OF T~E INVENTION
It is an object of the present invention to provide a separate type air-conditioner which is selectively operable in the air venting, refrigerant recovery or normal operation mode by an unskilled user.
In accordance with the aforesaid object, the present invention provides, in a separate type air-conditioner including an outdoor unit having elements such as a compressor, a condenser and a fan motor, an indoor unit with heat exchange means and conduit means for refrigerant supply and return arranged between the outdoor and indoor units, the improvement which comprises a switch, including a plurality o~ terminals for air venting, refrigerant recovery and normal operation modes of the air-conditioner, for electrically connecting at least one terminal to a source of power according to the selection of mode by a user; refrigerant flow control valve means provided in the conduits for selectively opening and closing the flow paths between said units, said control valve means being electrically connected to said terminals; and relay means, .
.
electrically connected to said terminal~, for controlling the current flow through at lea~t one seleeted terminal to said element~ and control valve means connected thereto, thereby to operate them.
DESCRIPTION OF ~HE DRAWING
Other objects and advantages will beeome apparent from the following deseription and appended elaims eonsidered together with the aceompanying drawings, in which:
Fig. 1 is a schematie view illu~trating an air-eonditioner in accordance with the present invention; and Fig. 2 is a sehematic view lllustrating an eleetrie eireuit for the air-conditioner having modes of air venting, refrigerant reeovering and normal operation in aeeordanee with the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to Fig. 1, there are shown an outdoor unit 1 including a eompressor le, a fan motor ld, a eonden~er le and a eapillary tube lf and an indoor unit Z ineluding heat exehange means sueh as eoil whieh is not shown. Conduits 3a, 3b are eoupled to the outdoor and indoor units 1, 2 by means of the eonneetor 7 to form a elosed refrigerant flow eireuit.
Conventionally, the air-eonditioner i8 taken out of a - . ~
. .
" ' . ~ :
.
- ` 2023483 manufactory with the outdoor unit 1 charged with most of the refrigerant. As is well known, the liquid refrigerant i8 discharged from the outdoor unit 1 through the refrigerant supply conduit 3a to the heat exchange means of the indoor unit 2 in which the liquid refrigerant absorbs heat from the ambient indoor air as the refrigerant vaporizes. The resulting cooled air may be then distributed to the space to be cooled. The vaporized refrigerant from the indoor unit 2 returns to the compressor lc via the refrigerant conduit 3b. In the compressor lc the vaporized refrigerant i8 further heated by work of compression and the resulting heated vaporized refrigerant i3 condensed into liquid in the condenser le by the ambient outdoor air blown by the fan. The condensed liquid refrigerant inltiates another cycle of the cooling mode for the air-conditioner.
In accordance with the present invention, a first refrigerant flow control valve 4 is provided at the outlet side of the ¦ outdoor unit 1 in the refrigerant supply conduit 3a and a second refrigerant flow control valve 5 is also provided at the inlet side of the outdoor unit 1 in the refrigerant return conduit 3b 80 that the refrigerant flow between the outdoor and indoor units 1, 2 may be controlled. In the refrigerant return conduit 3b the branch conduit 3c is formed, having the outlet communicating with atmosphere and is provided with a third flow control valve 6. Said flow control valves 4, 5, 6 are preferably solenoid valves.
Fig. 2 illustrates the electric circuit of the air-conditioner , .
. .
2023!!L83 in accordance with the present invention. Terminals A, B, C
may be selectively connected or disconnected to one of the poles of a source plug 10 by the switch 11, for example, a matrix switch for ~election of the air-conditioner operation mode.
Said first terminal A includes a relay RL1 of which one contact is directly connected thereto and the other contact i8 commonly connected to one end of each of the compressor lc and second flow control valve 5. The second terminal B is connected to one contact of the relay RL2 of which the other contact is connected to the third flow control valve 6. Said third terminal C is commonly connected to one end of the respective fan motor ld and first flow control valve 4 to which one contact of the third relay RL3 is commonly connected. The other contact of the relay RL3 is also connected to the other contact of the second relay RL2. The relays RL1, RL2, RL3 are preferably normally open type relay~.
A description of the operation modes of the air-conditioner in accordance with the present invention follows:
REFRIGERANT RECOVERY MODE
In the refrigerant recovery mode of the air-condltioner, the selection switch 11 connects the first terminal A of the electric circuit to the source of electric power via the plug 10. The coil of relay RLl is then activated, which closes the contacts thereof to operate the compressor lc and open the , -~ ..
---` ` 2023483 second flow control valve 5. Thus, the refrigerant prevailing in the indoor unit 2 and conduit 3A is forced to flow into the outdoor unit 1 via the return conduit 3B 80 that the air-conditioner may be di~assembled into section~ by releasing the connectors 7 with a minimized loss of refrigerant.
AIR VENTING MODE
It is necessary to remove the air prevailing in the conduits 3A, 3B and indoor unit 2 after setting up again the air-conditioner disassembled in sections. For this purpo~e, the selection switch 11 i8 set in the mode of air venting operation for the air-conditioner and thus the second terminal B is connected to the power source.
In the air venting mode, on the one hand, the coil of relay RL2 is activated and closes the contacts thereof to open the third flow control valve 6. On the other hand, the coil of relay RL3 is also activated and closes the contacts thereof to operate the fan motor ld and open the first flow control valve 4. The refrigerant stored under pressure in the outdoor unit 1 flows by its pressure through the control valve 4, conduit 3A and indoor unit 2 to the conduit 3B, urging the trapped air therein. The urged air is vented through the outlet of branch conduit 3c to the atmosphere.
When the air venting is completed, the vaporized refrigerant begins to vent. At that time the air venting mode may be switched into a normal operation mode by the user.
- .~
' ` ~` ,'::' ` ' ' .. . .
- .
.
' Alternatively, the air venting may be sensed by the typical sensor and automatically switched into a normal operation mode.
NORMAL OPERATION MODE
When the selection switch 11 is in the position of a normal operation mode, the fir~t and third terminals A, C are commonly connected to the power source. Accordingly, the flow control valves 4, 5 are opened, the compressor lc and the fan motor ld being operated whereby the refrigerant is normally circulated.
STOP MODE
In the stop mode, the selection switch does not connect any of the terminals to the power source and thus the air-conditioner remains in the stop mode.
In accordance with the novel construction of the present invention, the disassembling of the air-conditioner into sections and reestablishment thereof can be conducted by an unskilled user without separate apparatus for the air venting or refrigerant recovery.
It i8 further understood by those skilled in the art that the foregoing description relates to a preferred embodiment of the disclosed air-conditloner and that various change~ and modifications may be made in the invention without departing from the spirit and scope thereof.
. , .
.,:
' ' . ~ .
.~
Thi~ invention relates to a ~eparate type air-conditioner having indoor and outdoor unit~, and more particularly, to such an air-conditioner having air venting, refrigerant recovery and normal operation modes.
DESCRIPTION OF THE PRIOR ART
Ordinarily, a separate type air-conditioner i8 taken out of a manufactory with an outdoor unit charged with a large portion of the refrigerant and an indoor unit in which only a little refrigerant is charged for anti-corrosion. The indoor and outdoor units are set up at appropriate places and connected by conduits to each other.
After setting up again the air-conditioner the trapped air should be removed from the refrigerant flow paths, since the humidity contained in the trapped air is frozen and thereby causes the flow paths to be blocked or prevents the air-conditioner from smoothly operating.
Also, in the case of conveying the alr-conditioner in sections, the refrigerant should be recovered and stored in the outdoor unit before di~assembling the air-conditioner 80 as to prevent the refrigerant from flowing out exce~sively and to readily vent the trapped air from the refrigerant paths in future.
-- 1 - ~.
Conventionally, the operations for ~ecovering the refrigerant and for venting trapped air as well as reestablishment of the air-conditioner should be carried out by an operator skilled in thi~ art. Otherwise, such operations may be carried out by using such automatic apparatus as disclosed in the U.S. Patent No. 4,285,206, issued to Richard Koser, which is an additional burden to the user.
SUMMARY OF T~E INVENTION
It is an object of the present invention to provide a separate type air-conditioner which is selectively operable in the air venting, refrigerant recovery or normal operation mode by an unskilled user.
In accordance with the aforesaid object, the present invention provides, in a separate type air-conditioner including an outdoor unit having elements such as a compressor, a condenser and a fan motor, an indoor unit with heat exchange means and conduit means for refrigerant supply and return arranged between the outdoor and indoor units, the improvement which comprises a switch, including a plurality o~ terminals for air venting, refrigerant recovery and normal operation modes of the air-conditioner, for electrically connecting at least one terminal to a source of power according to the selection of mode by a user; refrigerant flow control valve means provided in the conduits for selectively opening and closing the flow paths between said units, said control valve means being electrically connected to said terminals; and relay means, .
.
electrically connected to said terminal~, for controlling the current flow through at lea~t one seleeted terminal to said element~ and control valve means connected thereto, thereby to operate them.
DESCRIPTION OF ~HE DRAWING
Other objects and advantages will beeome apparent from the following deseription and appended elaims eonsidered together with the aceompanying drawings, in which:
Fig. 1 is a schematie view illu~trating an air-eonditioner in accordance with the present invention; and Fig. 2 is a sehematic view lllustrating an eleetrie eireuit for the air-conditioner having modes of air venting, refrigerant reeovering and normal operation in aeeordanee with the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to Fig. 1, there are shown an outdoor unit 1 including a eompressor le, a fan motor ld, a eonden~er le and a eapillary tube lf and an indoor unit Z ineluding heat exehange means sueh as eoil whieh is not shown. Conduits 3a, 3b are eoupled to the outdoor and indoor units 1, 2 by means of the eonneetor 7 to form a elosed refrigerant flow eireuit.
Conventionally, the air-eonditioner i8 taken out of a - . ~
. .
" ' . ~ :
.
- ` 2023483 manufactory with the outdoor unit 1 charged with most of the refrigerant. As is well known, the liquid refrigerant i8 discharged from the outdoor unit 1 through the refrigerant supply conduit 3a to the heat exchange means of the indoor unit 2 in which the liquid refrigerant absorbs heat from the ambient indoor air as the refrigerant vaporizes. The resulting cooled air may be then distributed to the space to be cooled. The vaporized refrigerant from the indoor unit 2 returns to the compressor lc via the refrigerant conduit 3b. In the compressor lc the vaporized refrigerant i8 further heated by work of compression and the resulting heated vaporized refrigerant i3 condensed into liquid in the condenser le by the ambient outdoor air blown by the fan. The condensed liquid refrigerant inltiates another cycle of the cooling mode for the air-conditioner.
In accordance with the present invention, a first refrigerant flow control valve 4 is provided at the outlet side of the ¦ outdoor unit 1 in the refrigerant supply conduit 3a and a second refrigerant flow control valve 5 is also provided at the inlet side of the outdoor unit 1 in the refrigerant return conduit 3b 80 that the refrigerant flow between the outdoor and indoor units 1, 2 may be controlled. In the refrigerant return conduit 3b the branch conduit 3c is formed, having the outlet communicating with atmosphere and is provided with a third flow control valve 6. Said flow control valves 4, 5, 6 are preferably solenoid valves.
Fig. 2 illustrates the electric circuit of the air-conditioner , .
. .
2023!!L83 in accordance with the present invention. Terminals A, B, C
may be selectively connected or disconnected to one of the poles of a source plug 10 by the switch 11, for example, a matrix switch for ~election of the air-conditioner operation mode.
Said first terminal A includes a relay RL1 of which one contact is directly connected thereto and the other contact i8 commonly connected to one end of each of the compressor lc and second flow control valve 5. The second terminal B is connected to one contact of the relay RL2 of which the other contact is connected to the third flow control valve 6. Said third terminal C is commonly connected to one end of the respective fan motor ld and first flow control valve 4 to which one contact of the third relay RL3 is commonly connected. The other contact of the relay RL3 is also connected to the other contact of the second relay RL2. The relays RL1, RL2, RL3 are preferably normally open type relay~.
A description of the operation modes of the air-conditioner in accordance with the present invention follows:
REFRIGERANT RECOVERY MODE
In the refrigerant recovery mode of the air-condltioner, the selection switch 11 connects the first terminal A of the electric circuit to the source of electric power via the plug 10. The coil of relay RLl is then activated, which closes the contacts thereof to operate the compressor lc and open the , -~ ..
---` ` 2023483 second flow control valve 5. Thus, the refrigerant prevailing in the indoor unit 2 and conduit 3A is forced to flow into the outdoor unit 1 via the return conduit 3B 80 that the air-conditioner may be di~assembled into section~ by releasing the connectors 7 with a minimized loss of refrigerant.
AIR VENTING MODE
It is necessary to remove the air prevailing in the conduits 3A, 3B and indoor unit 2 after setting up again the air-conditioner disassembled in sections. For this purpo~e, the selection switch 11 i8 set in the mode of air venting operation for the air-conditioner and thus the second terminal B is connected to the power source.
In the air venting mode, on the one hand, the coil of relay RL2 is activated and closes the contacts thereof to open the third flow control valve 6. On the other hand, the coil of relay RL3 is also activated and closes the contacts thereof to operate the fan motor ld and open the first flow control valve 4. The refrigerant stored under pressure in the outdoor unit 1 flows by its pressure through the control valve 4, conduit 3A and indoor unit 2 to the conduit 3B, urging the trapped air therein. The urged air is vented through the outlet of branch conduit 3c to the atmosphere.
When the air venting is completed, the vaporized refrigerant begins to vent. At that time the air venting mode may be switched into a normal operation mode by the user.
- .~
' ` ~` ,'::' ` ' ' .. . .
- .
.
' Alternatively, the air venting may be sensed by the typical sensor and automatically switched into a normal operation mode.
NORMAL OPERATION MODE
When the selection switch 11 is in the position of a normal operation mode, the fir~t and third terminals A, C are commonly connected to the power source. Accordingly, the flow control valves 4, 5 are opened, the compressor lc and the fan motor ld being operated whereby the refrigerant is normally circulated.
STOP MODE
In the stop mode, the selection switch does not connect any of the terminals to the power source and thus the air-conditioner remains in the stop mode.
In accordance with the novel construction of the present invention, the disassembling of the air-conditioner into sections and reestablishment thereof can be conducted by an unskilled user without separate apparatus for the air venting or refrigerant recovery.
It i8 further understood by those skilled in the art that the foregoing description relates to a preferred embodiment of the disclosed air-conditloner and that various change~ and modifications may be made in the invention without departing from the spirit and scope thereof.
. , .
.,:
' ' . ~ .
.~
Claims (6)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a separate type air-conditioner including an outdoor unit having elements such as a compressor, a condenser and a fan motor, and an indoor unit with heat exchange means and conduit means for refrigerant supply and return arranged between the outdoor and indoor units, the improvement which comprises a switch, including a plurality of terminals for air venting, refrigerant recovery and normal operation modes of the air-conditioner, for electrically connecting at least one terminal to a source of power according to the selection of mode by a user; refrigerant flow control valve means provided in the conduits for selectively opening and closing the flow paths between said units, being electrically connected to said terminals; and relay means, electrically connected to said terminals, for controlling the current flow through at least one selected terminal to said elements and valve means connected thereto, thereby to operate them.
2. An air-conditioner as described in claim 1 wherein said refrigerant flow control means comprises a first control valve provided at the outlet side of the outdoor unit in the refrigerant supply conduit; a second control valve provided at the inlet side of the outdoor unit in the refrigerant return conduit; and a third control valve provided in a branch conduit which is diverged from the refrigerant return conduit and has an outlet communicating with the atmosphere to vent the air trapped in the refrigerant flow paths of the air-conditioner.
3. An air-conditioner as described in claim 1 or claim 2 wherein the terminals of the electric circuit include a first terminal to which the compressor and second control valve are connected in parallel, a second terminal to which the fan motor, first control valve and third control valve are connected in parallel, and a third terminal to which said fan motor and first control valve are also connected in parallel.
4. An air-conditioner as described in claim 3 wherein said relay means includes a first relay of which one contact is directly connected to the first terminal and the other contact is commonly connected to the compressor and second control valve, a second relay of which one contact is directly connected to the second terminal and the other contact is connected to the third control valve, and a third relay having one contact connected to the other contact of the second relay and the other contact commonly connected to the fan motor and first control valve, each of said relays being a normally open type relay of which the coil is activated to close the contacts when the current flows thereto.
5. An air-conditioner as described in claim 2 wherein each of the refrigerant flow control valves is a solenoid valve.
6. An air-conditioner as described in claim 4 wherein said mode selection switch includes a refrigerant recovery mode in which the first terminal is connected to the power source, an air venting mode in which the second terminal is connected to the power source, a normal operation mode in which the first and third terminals are connected to the power source and a stop mode in which none of the terminals is connected to the power source.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019890012819U KR910007569Y1 (en) | 1989-08-31 | 1989-08-31 | Air-conditioner |
| KR89-12819 | 1989-08-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2023483A1 CA2023483A1 (en) | 1991-03-01 |
| CA2023483C true CA2023483C (en) | 1993-04-06 |
Family
ID=19289641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002023483A Expired - Fee Related CA2023483C (en) | 1989-08-31 | 1990-08-17 | Separate type air-conditioner |
Country Status (5)
| Country | Link |
|---|---|
| KR (1) | KR910007569Y1 (en) |
| CA (1) | CA2023483C (en) |
| DE (1) | DE4026868C2 (en) |
| FR (1) | FR2651305B1 (en) |
| GR (1) | GR1002683B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW330977B (en) * | 1996-06-04 | 1998-05-01 | Jinkichi Aizawa | Heat exchanger, method of reusing and recovering refrigerant thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4285206A (en) * | 1979-02-05 | 1981-08-25 | Draf Tool Co., Inc. | Automatic refrigerant recovery, purification and recharge apparatus |
-
1989
- 1989-08-31 KR KR2019890012819U patent/KR910007569Y1/en not_active IP Right Cessation
-
1990
- 1990-08-17 CA CA002023483A patent/CA2023483C/en not_active Expired - Fee Related
- 1990-08-24 DE DE4026868A patent/DE4026868C2/en not_active Expired - Fee Related
- 1990-08-28 FR FR9010723A patent/FR2651305B1/en not_active Expired - Fee Related
- 1990-08-29 GR GR900100651A patent/GR1002683B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE4026868C2 (en) | 1996-07-11 |
| DE4026868A1 (en) | 1991-03-14 |
| FR2651305B1 (en) | 1994-04-01 |
| KR910007569Y1 (en) | 1991-09-30 |
| GR900100651A (en) | 1991-12-30 |
| FR2651305A1 (en) | 1991-03-01 |
| KR910004660U (en) | 1991-03-19 |
| CA2023483A1 (en) | 1991-03-01 |
| GR1002683B (en) | 1997-05-02 |
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| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |