CN1196899C - Air conditioner and its controlling method - Google Patents
Air conditioner and its controlling method Download PDFInfo
- Publication number
- CN1196899C CN1196899C CNB021403325A CN02140332A CN1196899C CN 1196899 C CN1196899 C CN 1196899C CN B021403325 A CNB021403325 A CN B021403325A CN 02140332 A CN02140332 A CN 02140332A CN 1196899 C CN1196899 C CN 1196899C
- Authority
- CN
- China
- Prior art keywords
- power supply
- relay
- indoor unit
- unit
- conditioner
- 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
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Classifications
-
- 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
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
- F24F1/005—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted on the floor; standing on the floor
-
- 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
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/009—Indoor units, e.g. fan coil units characterised by heating arrangements
- F24F1/0093—Indoor units, e.g. fan coil units characterised by heating arrangements with additional radiant heat-discharging elements, e.g. electric heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/37—Resuming operation, e.g. after power outages; Emergency starting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/34—Heater, e.g. gas burner, electric air heater
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/54—Heating and cooling, simultaneously or alternatively
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
An air conditioner having a low-pressure switch and a power supply unit. The low-pressure switch shuts off the supply of power to an indoor unit if a refrigerant pressure in a suction side of a compressor is decreased. The power supply unit supplies power to the indoor unit of the air conditioner so that a heating operation is performed using an electric heater mounted in the outdoor unit even though the low-pressure switch is turned off. The power supply unit may supply power to the indoor unit if an outdoor air temperature is equal to or lower than a preset reference temperature.
Description
Technical field
The present invention relates to a kind of air-conditioner and a kind of method of controlling this air-conditioner, relate to a kind of air-conditioner and a kind of method of controlling this air-conditioner more specifically, it can be provided to indoor unit with energy, even so that also can carry out heating operation by using electric heater under the situation that low tension switch disconnects owing to the reduction of refrigerant pressure.
Background technology
In traditional air-conditioner, cooling down operation is to carry out with the cold-producing medium circulation, and heating operation is to carry out with electric heater.
As shown in Figure 1, the indoor unit of conventional air conditioner comprises: be formed at the air inlet 2 and the exhaust outlet 4 of cell cube 1 front upper and bottom, it is inspiration and discharge room air respectively; Be positioned at the air cleaner 3 behind the air inlet 2, it gets rid of the impurity in the room air that sucks by air inlet 2; Be installed in exhaust outlet 4 preceding wind directions and regulate fan blade 6, it regulates the direction of the wind of discharging by exhaust outlet 4, be installed in the indoor fan motor 7 in the pipeline 8, it sucks room air and exhausts air to the interior space by air inlet 2, be installed in the indoor heat converter 5 behind the air inlet 2, the room air that sucks by air inlet 2 in its heat of cooling exchange, and the electric heater 9 that is installed in pipeline 8 tops, the room air that sucks by air inlet 2 in its heat hot exchange.
In addition, conventional air conditioner comprises that also a low tension switch (not shown in figure 1) is impaired because cooling agent pressure reduces to prevent compressor.
With reference to Fig. 2, low tension switch 12 is connected with the coil of power relay 11 between external power source 10 and internal element, and the contact of power relay 11 is closed or disconnect to provide respectively and to cut off the electricity supply by the operation of low tension switch 12.For example, when the refrigerant pressure of compressor suction side was higher than reference pressure, low tension switch 12 was just closed, thereby provide+driving power of 12V is to the coil of power relay 11.On the other hand, when the refrigerant pressure of compressor suction side was equal to or less than reference pressure, low tension switch 12 just disconnected, thus cut off on the coil of power relay 11, provide+driving power of 12V.
When low tension switch 12 is closed, thereby indoor unit microcomputer 13 is just controlled electric heater driver element 14 and is opened electric heater 9 and carry out heating operation.
Yet in conventional air conditioner, when the low tension switch that is installed in the compressor suction side disconnected owing to the reduction of refrigerant pressure, power relay was just consistent with the operation of low tension switch and disconnect, thereby cuts off the power supply that is provided to indoor unit.Therefore, air-conditioner can not carry out heating operation with electric heater 9.In other words, lower at outside air temperature, as when the winter,, just do not need the low tension switch action because do not carry out cooling down operation.Yet, because descending, the refrigerant pressure that low tension switch causes owing to lower outside air temperature disconnects, therefore may carry out heating operation with electric heater hardly.
Summary of the invention
Therefore, an object of the present invention is to provide a kind of air-conditioner and a kind of method of controlling this air-conditioner, though its can provide power supply to indoor unit so that under the situation that low tension switch disconnected owing to the reduction of refrigerant pressure in the season in cold, also can adopt electric heater to carry out heating operation.
Additional objects and advantages of the present invention will illustrate in the following description that partly part will become clear in description, or will obtain by working of an invention.
The aforesaid purpose with other of the present invention realizes that by a kind of air-conditioner is provided it comprises: low tension switch, and it is used for disconnecting the power supply that is provided on the indoor unit when the refrigerant pressure reduction of compressor suction side; And power supply unit, it is used for providing power supply to the indoor unit of air-conditioner, even thereby under the situation that low tension switch disconnects, also can adopt the electric heater that is installed in the outdoor unit to carry out heating operation, be equal to or less than at outside air temperature under the situation of default reference temperature, power supply unit also can provide power supply to indoor unit.
Power supply unit comprises: the relay in parallel with low tension switch; Be used to survey the outside air temperature probe unit of outside air temperature; Control module, it is used for when the outside air temperature that detects is equal to or less than preset temperature the output relay signal with closing relay; And the relay driving power, it is used for coming closing relay according to the relay signal of control module.
In addition, the invention provides a kind of refrigerant pressure in the compressor suction side reduces, when being arranged at the interior low tension switch disconnection of outdoor unit with cut-out indoor unit power supply, the method for control air-conditioner, this method comprises: judge whether the existing operator scheme of air-conditioner is the heating operation pattern; Even low tension switch also can provide power supply to indoor unit under situation about disconnecting under the heating operation pattern; The electric heater that is installed in indoor unit by running carries out the heating operation pattern, and wherein providing of power supply comprises: survey outside air temperature under the heating operation pattern; Judge whether the outside air temperature that detects is equal to or less than reference temperature; When the outside air temperature that detects is equal to or less than reference temperature, provide power supply to indoor unit by the operation relay in parallel with low tension switch.
Description of drawings
Above and other target of the present invention and advantage are from knowing more below in conjunction with becoming the accompanying drawing detailed description of the preferred embodiment and being more readily understood, wherein:
Fig. 1 is the part viewgraph of cross-section of conventional air conditioner;
Fig. 2 is the circuit diagram of conventional air conditioner;
Fig. 3 is the circuit diagram of explanation and the corresponding to air-conditioner of the embodiment of the invention; And
Fig. 4 is explanation and the flow chart of the control of the outdoor unit microcomputer of the corresponding to air-conditioner of the embodiment of the invention.
The specific embodiment
Below in conjunction with accompanying drawing of the present invention preferred embodiment is described in detail, label identical among the figure is represented components identical all the time.Below will be described, so that explain the present invention by accompanying drawing to described embodiment.
Fig. 3 is the circuit diagram with the corresponding to air-conditioner of the embodiment of the invention.As shown in the figure, air-conditioner of the present invention comprises power relay 11, it is connected on the power line that connects external power source 10 and indoor unit, the low tension switch 12 of connecting with the coil of power relay 11, be installed in the indoor unit indoor unit microcomputer 13, and be used for the electric heater driving power 14 of under the control of indoor unit microcomputer 13 operation electric heater 9 with the running of control electric heater 9.
In addition, air-conditioner of the present invention also comprises the relay 23 in parallel with low tension switch 12, the relay drive unit 22 of operational relay 23, be used for surveying the outside air temperature probe unit 20 of outside air temperature and be used for driving signal to drive the outdoor unit microcomputer 21 of relay 23 to relay drive unit 22 output relays.
Outdoor microcomputer 21 judges whether operational relay 23 by outside air temperature and the preset reference temperature that comparison outside air temperature probe unit 20 detects.In other words because at low tension switch 12 since the reduction of outside air temperature may be disconnected the time external power source 10 disconnect the unit internally, so relay 23 is just closed to prevent that such situation from taking place.In this case, reference temperature refers to that refrigerant pressure is owing to lower outside air temperature reduces to cause the temperature of low tension switch 10 disconnections, preferred-10 ℃ approximately.
Outdoor unit microcomputer 21 judges by indoor unit microcomputer 13 and order wire (not shown) whether the operator scheme of air-conditioner is the heating operation pattern, and the operation that comes control relay 23 under the heating operation pattern according to the outside air temperature that detects.
Outside air temperature probe unit 20 comprises thermistor TH and resistor R 1 and R2, and it is to the detectable signal of outdoor unit microcomputer 21 outputs corresponding to outdoor temperature.This is because the resistance value of thermistor TH changes with outside air temperature.
Relay drive unit 22 comprises resistor R 3 and transistor T R.Transistor T R is according to the relay drive signal closed and disconnected from 21 outputs of outdoor unit microcomputer.In other words, when the outside air temperature that detects was lower than reference temperature, outdoor unit microcomputer 21 just drove signal to relay drive unit 22 output relays.As a result, transistor T R is closed, therefore+driving power of 12V just is provided on the coil of relay 23, thus the contact of closing relay 23.Simultaneously, when outdoor unit microcomputer 21 output relays drove signal with disconnection relay 23, transistor T R just disconnected.Therefore, the driving power of+12V just can not be provided on the coil of relay 23, so the contact of relay 23 just is disconnected.
In other words, even relay 23 also can be closed when low tension switch 12 disconnects, the driving power of+12V just is applied on the coil of power relay 11.As a result, the contact of power relay 12 just is closed, so external power source 10 just is applied on the indoor unit of air-conditioner.
The control of air-conditioner of the present invention is described with reference to Fig. 4.
In operation S10, outdoor unit microcomputer 21 judges whether the existing operator scheme of air-conditioner is the heating operation pattern, communicates by letter with indoor unit microcomputer 13 by order wire simultaneously.If the existing operator scheme of air-conditioner is not the heating operation pattern, this process is just got back to the operation that comes the operating air conditioner device according to concrete operator scheme, if the existing operator scheme of air-conditioner is the heating operation pattern, outdoor unit microcomputer 21 usefulness are surveyed outside air temperature by the detectable signal of outdoor temperature probe unit 20 inputs, shown in operation S20.
Then, in operation S30, outdoor unit microcomputer 21 judges whether outside air temperature is equal to or less than the preset reference temperature.In this case, reference temperature refer to refrigerant pressure in the season of cold owing to lower outside air temperature reduces temperature to cause that low tension switch 10 disconnects.
If the judged result of operation S30 is that the outside air temperature that detects is equal to or less than reference temperature, then relay drive signal just outputs to relay drive unit 22 with closing relay 23.Therefore, in operation S40, transistor T R just is closed, thereby the contact of relay 23 just is closed.Therefore, even because under the situation that low tension switch 12 disconnects, power relay 11 also can be closed, so external power source 10 just is applied on the indoor unit of air-conditioner.Then, the operation of indoor unit microcomputer 13 control electric heaters 9 is to carry out heating operation.
If the judged result of operation S30 is that the outside air temperature that detects is higher than reference temperature, then relay drive signal just outputs to relay drive unit 22 to disconnect relay 23.Therefore, in operation S50, transistor T R just is disconnected, thereby the contact of relay 23 just is disconnected.
As mentioned above, the invention provides the method for a kind of air-conditioner and this air-conditioner of control, it can operate the power relay of connecting with low tension switch, even low tension switch descends situation about disconnecting owing to the refrigerant pressure that is caused by lower outside air temperature under, external power source also can be applied on the indoor unit, thereby heats with electric heater.
Although show and described several preferred embodiments of the present invention, be understandable that, those of ordinary skill in the art can make amendment to embodiment under the situation of not leaving principle of the present invention and spirit, and scope of the present invention is equal in the replacement at claim and its and limits.
Claims (3)
1. air-conditioner with outdoor unit and indoor unit, described outdoor unit has electric heater, and described indoor unit has compressor, and it comprises:
Low tension switch, it is used for refrigerant pressure in the suction side of described compressor when being reduced to the degree that is equal to or less than reference pressure, and the power supply that provides to described indoor unit is provided; And
Power supply unit, it is used for providing the described indoor unit of power supply to air-conditioner when described low tension switch disconnects, so that adopt the described electric heater that is installed in the described outdoor unit to carry out heating operation,
Wherein when outside air temperature was equal to or less than the preset reference temperature, described power supply unit provided power supply to described indoor unit.
2. air-conditioner according to claim 1, wherein said power supply unit comprises:
The relay of connecting with described low tension switch;
Be used to survey the outside air temperature probe unit of outside air temperature;
Control module when it is equal to or less than described preset reference temperature at the outside air temperature that detects, is used for output relay to drive signal with the described relay of closure; And
Relay drive unit, it is used for coming closed described relay according to the relay drive signal of described control module.
3. a method of controlling air-conditioner when the refrigerant pressure of described air-conditioner in the compressor suction side reduces, is arranged on the interior low tension switch of outdoor unit and just disconnects to cut off the electricity supply from indoor unit, and described method comprises:
Whether the linear operation mode of judging air-conditioner is the heating operation pattern;
When low tension switch when heating mode breaks, provide power supply to indoor unit; And
The electric heater that is installed in the indoor unit by operation carries out heating operation with the power supply of supplying with,
The supply of wherein said power supply comprises:
Under the heating operation pattern, survey outside air temperature;
Judge whether the outside air temperature that detects is equal to or less than reference temperature; And
When the outside air temperature that detects is equal to or less than reference temperature,, provide power supply to indoor unit by the operation relay in parallel with low tension switch.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR200175153 | 2001-11-30 | ||
| KR10-2001-0075153A KR100423972B1 (en) | 2001-11-30 | 2001-11-30 | Air conditioner and therof control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1421652A CN1421652A (en) | 2003-06-04 |
| CN1196899C true CN1196899C (en) | 2005-04-13 |
Family
ID=19716474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021403325A Expired - Fee Related CN1196899C (en) | 2001-11-30 | 2002-07-01 | Air conditioner and its controlling method |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20030102121A1 (en) |
| KR (1) | KR100423972B1 (en) |
| CN (1) | CN1196899C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10361392B4 (en) * | 2003-12-29 | 2009-07-30 | Airbus Deutschland Gmbh | Air distribution system |
| US9261282B2 (en) * | 2009-09-10 | 2016-02-16 | Lennox Industries Inc. | Heating system controller, a heating system and a method of operating a heating system |
| JP6120786B2 (en) * | 2014-02-13 | 2017-04-26 | 三菱電機株式会社 | Air conditioner and control program |
| US11209177B2 (en) * | 2014-11-21 | 2021-12-28 | Mitsubishi Electric Corporation | System and method for controlling the operation of an outdoor air conditioner |
| US10605481B2 (en) * | 2016-03-24 | 2020-03-31 | Gregory Mark Huseman | Systems and methods for replaceable multiple filter units |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3171264A (en) * | 1961-01-23 | 1965-03-02 | Gerald R Griffin | Low-pressure and safety cut-in switch |
| US3252295A (en) * | 1963-09-27 | 1966-05-24 | American Air Filter Co | Refrigeration control system |
| US4384608A (en) * | 1980-08-11 | 1983-05-24 | Ford Motor Company | Reverse cycle air conditioner system |
| US4718246A (en) * | 1986-09-02 | 1988-01-12 | Mitchell Charles F | Pressure control override |
| JPH0689976B2 (en) * | 1987-03-13 | 1994-11-14 | 株式会社東芝 | Refrigerator temperature control circuit |
| JP2597394B2 (en) * | 1988-09-09 | 1997-04-02 | 株式会社ゼクセル | Vehicle air conditioner |
| US5520327A (en) * | 1994-09-23 | 1996-05-28 | Carrier Corporation | Electronic thermostat having safety feature |
| KR19980072366A (en) * | 1997-03-04 | 1998-11-05 | 구자홍 | Operation method in case of power failure of air conditioner |
| KR20000019502A (en) * | 1998-09-11 | 2000-04-15 | 구자홍 | Operation mode selector of air conditioner and selection method thereof |
| KR100315485B1 (en) * | 1999-11-19 | 2001-11-30 | 윤종용 | compressor starting apparatus of air conditioner |
-
2001
- 2001-11-30 KR KR10-2001-0075153A patent/KR100423972B1/en not_active IP Right Cessation
-
2002
- 2002-06-10 US US10/164,386 patent/US20030102121A1/en not_active Abandoned
- 2002-07-01 CN CNB021403325A patent/CN1196899C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR20030044419A (en) | 2003-06-09 |
| KR100423972B1 (en) | 2004-03-22 |
| US20030102121A1 (en) | 2003-06-05 |
| CN1421652A (en) | 2003-06-04 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050413 Termination date: 20150701 |
|
| EXPY | Termination of patent right or utility model |