CN201348340Y - Speed regulating device and air conditioning system using same - Google Patents
Speed regulating device and air conditioning system using same Download PDFInfo
- Publication number
- CN201348340Y CN201348340Y CNU2008202043800U CN200820204380U CN201348340Y CN 201348340 Y CN201348340 Y CN 201348340Y CN U2008202043800 U CNU2008202043800 U CN U2008202043800U CN 200820204380 U CN200820204380 U CN 200820204380U CN 201348340 Y CN201348340 Y CN 201348340Y
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 49
- 238000004378 air conditioning Methods 0.000 title claims abstract description 39
- 238000004891 communication Methods 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 238000011084 recovery Methods 0.000 claims description 4
- 238000005057 refrigeration Methods 0.000 abstract description 12
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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Abstract
The utility model relates to a be applied to air conditioning system's low temperature speed adjusting device and air conditioning system. The speed regulating device comprises a pressure switch which is arranged on an exhaust pipeline of the compressor of the air conditioning system; the chopping speed regulation board further comprises a main controller, a pressure switch signal input interface, a power circuit, a 485 communication module, a zero-crossing detection circuit and a motor control signal output module, wherein the pressure switch signal input interface, the power circuit, the 485 communication module, the zero-crossing detection circuit and the motor control signal output module are connected with the main controller; the chopping speed regulation plate receives the state information of the pressure switch through a pressure switch signal input interface; the main controller is internally stored with a logic program, the logic program controls the rotating speed of the outer fan according to a pressure switch signal, the running time and the running mode of the air conditioning system, and the power circuit is connected with an outer machine mainboard of the air conditioning system. The novel low-temperature refrigeration speed regulation device has the characteristics of low cost and low failure rate.
Description
Technical field
The utility model relates to a kind of low temperature arrangements for speed regulation and air-conditioning system that is applied to air-conditioning system.
Background technology
A lot of areas such as in Europe, some bakerys, kitchen and exclusive restaurant still need to keep the comfortableness of room air under the terribly cold situation of outdoor weather in winter, they are being the requirements that can't satisfy indoor constant temperature and humidity degree by opening heating installation only, therefore common air-conditioning is installed can't need a kind of low-temperature refrigeration air conditioner of exploitation to regulate indoor comfort under low temperature environment at safe and reliable operation under the low temperature environment again.Domestic cryogenic refrigeration arrangements for speed regulation commonly used all are adopts pressure sensor and temperature sensor at present, realize cryogenic refrigeration by exhaust pressure value that detects cooler compressor and the air quantity that outdoor environment temperature is regulated outer blower fan jointly, the cost of a pressure sensor is at more than 200 yuan of RMB, and cost is somewhat expensive; The cost of a pressure switch has only tens yuan, and not only cost reduces greatly, and reliability is stronger.
Chopping regulating speed is a kind of more common electric machine speed regulation mode, is not that very high occasion is used in a large number in required precision.This mode of speed regulation construction cycle is short, cost is low, has obtained extensive utilization at air conditioner industry.In addition, in refrigeration system, the gear of outer blower fan requires generally to be determined indirectly by outer machine mainboard according to the detected temperature of specified point temperature-sensitive bag: promptly the detected temperature of temperature-sensitive bag is high more, and the air quantity that outer blower fan needs is big more, it is many more to dispel the heat, and refrigerating capacity is also just big more.Otherwise temperature is low more, and the air quantity that needs is just more little, and refrigerating capacity is also just few more, thereby outer blower fan gear requires to be determined.
The utility model content
First purpose of the present utility model provide a kind of be used for air-conditioning system, arrangements for speed regulation cheaply.
Second purpose of the present utility model provides a kind of air-conditioning system of using above-mentioned arrangements for speed regulation.
For realizing above-mentioned first purpose, the utility model provides following technical scheme:
Arrangements for speed regulation comprise
Pressure switch, it is installed on the gas exhaust piping of air-conditioning compressor;
The chopping regulating speed plate, pressure switch signal input interface, power circuit, 485 communication modules, zero cross detection circuit and motor control signal output module that it further comprises master controller and is connected with master controller, the chopping regulating speed plate is by the outer machine mainboard communication of 485 communication modules and air-conditioning system; The chopping regulating speed plate receives the status information of pressure switch by the pressure switch signal input interface; Store logical program in the described master controller, described power circuit connects the outer machine mainboard of air-conditioning system.
The characteristics of this new type low temperature refrigeration arrangements for speed regulation be by detect pressure switch make-and-break signal on the compressor exhaust pipe and the time of on certain wind speed gear, moving in conjunction with outer blower fan and pattern regulate outside the rotating speed of blower fan.When detecting pressure switch disconnection or closure, the time that the logical program that has configured in the arrangements for speed regulation moves on certain wind speed gear according to outer blower fan, unit operation pattern and outer blower fan gear finally decide raising, reduce or keep outer blower fan rotating speed.The disconnection of pressure switch can be chosen different force value according to different air-conditioning systems with the recovery force value.Compare with present domestic existing low temperature arrangements for speed regulation, cost has reduced nearly 200 yuans; Control mode is brief, and versatility is stronger, only with a pressure switch detection signal, need not temperature sensor, has also reduced the generation of the fault rate of being brought by temperature sensor.
For realizing above-mentioned second purpose, the utility model provides following technical scheme:
Air-conditioning system comprises the compressor that connects into the closed-loop path, indoor heat exchanger, outdoor heat exchanger, off-premises station mainboard, outer blower fan and the external blower fan arrangements for speed regulation that carry out speed governing, and described arrangements for speed regulation comprise:
Pressure switch, it is installed on the gas exhaust piping of air-conditioning compressor;
The chopping regulating speed plate, pressure switch signal input interface, power circuit, 485 communication modules, zero cross detection circuit and motor control signal output module that it further comprises master controller and is connected with master controller, the chopping regulating speed plate is by the outer machine mainboard communication of 485 communication modules and air-conditioning system; The chopping regulating speed plate receives the status information of pressure switch by the pressure switch signal input interface; Store the outer machine mainboard of the described power circuit connection of logical program air-conditioning system in the described master controller.
Described chopping regulating speed plate is divided into the N shelves with the rotating speed of outer blower fan, the different weight percentage of the outer blower fan maximum (top) speed of each gear correspondence, and wherein N is greater than 3.
Compare with present technology, arrangements for speed regulation of the present utility model are a kind of special in low-temperature refrigeration air conditioner designs, and satisfy air-conditioning system and can normally use under low temperature environment, make the refrigeration reliability service ambient temperature range of air-conditioner expand-15 ℃≤T≤43 ℃ to.The reliable refrigerating operaton ambient temperature range of common air-conditioning device is 18 ℃≤T≤43 ℃, is lower than this environment temperature running refrigerating and evaporimeter frosting will occur, and system pressure is low, anomalies such as system's band liquid.
Description of drawings
Fig. 1 is the schematic diagram of the utility model air-conditioning system;
Fig. 2 is the module frame chart of chopping regulating speed plate;
Fig. 3 is the circuit diagram of chopping regulating speed plate.
The utility model is described in further detail below in conjunction with drawings and Examples.
The specific embodiment
Referring to Fig. 1, air-conditioning system mainly comprises compressor 1, indoor heat exchanger 2 and the outdoor heat exchanger 3 that connects into the closed-loop path.Off-premises station mainboard 6 and the arrangements for speed regulation 5 externally rotating speed of blower fan 4 are regulated.The rotating speed of regulating outer blower fan 4 can reach the purpose of conditioning chamber external heat exchanger 3 heat exchange effects.Described arrangements for speed regulation 5 comprise pressure switch 51 and chopping regulating speed plate 52, and pressure switch 51 is installed on the gas exhaust piping of compressor 1.Referring to Fig. 2, pressure switch signal input interface 522, power circuit 523, RS485 communication module 524, zero cross detection circuit 525 and motor control signal output module 526 that chopping regulating speed plate 52 comprises master controller 521 and is connected with master controller, chopping regulating speed plate 52 is by the outer machine mainboard communication of RS485 communication module and air-conditioning system.Chopping regulating speed plate 52 receives the status information of pressure switch 51 by the pressure switch signal input interface.Store logical program in the master controller 521, this logical program is controlled outer blower fan rotating speed according to pressure switch signal, air-conditioning system running time and operational mode.Power circuit 523 connects the outer machine mainboard 6 of air-conditioning system.Master controller 521 comprises MCU, crystal oscillator, reset circuit, pull-up resistor and switch.
Referring to Fig. 3, each unit composition and the workflow of chopping regulating speed plate 52 are as follows:
Power circuit 523 comprises first filter circuit, mu balanced circuit, second filter circuit that connects successively.First filter circuit and second filter circuit comprise electrochemical capacitor and ceramic disc capacitor in parallel respectively, mu balanced circuit is the voltage stabilizing chip of 5V, direct current 12V power supply is earlier through the first filter circuit filtering, become 5V through the voltage stabilizing chip of 5V again and stablize d. c. voltage signal, pass through the stable 5V voltage signal of output smoothing after the filtering second time then.
Pressure switch signal input interface 522 comprises filter circuit and pull-up resistor, filter circuit is made of two electrochemical capacitor structures, the pressure detection switch signal is exported from pressure detection switch, stablize output signal level through pull-up resistor, the signal of the filtering output smoothing of wave circuit inserts on the respective pins of MCU after filtration then.
Zero cross detection circuit 525 comprises the photoelectricity coupling circuit, an ac signal elder generation diode of series connection and a resistance are concatenated on the input port of photoelectric coupling circuit again, be connected to the respective pins of MCU on the output port of photoelectronic coupler, MCU calculates sinusoidal ac signal period number by the number of times that calculates the photoelectronic coupler conducting
The signal output apparatus 6 of motor comprises photoelectric coupling circuit, ghyristor circuit, inserts on the MCU port after photoelectric coupling circuit is connected with current-limiting resistance, and photoelectric coupling circuit first pin connects+the 5V power supply; Photoelectric coupling circuit another one pin connects controllable silicon, and photoelectric coupling circuit connects embedding and presses diode with positive and negative respectively; Capacitance-resistance module in parallel between the controllable silicon pin 1 connects 220V forceful electric power positive source terminal X1 behind the 2nd pin series connection differential mode inductance L1; Between terminal X1 and controllable silicon pin 1, incorporate capacitance-resistance module RC1 again into, and controllable silicon pin 1 is inserted positive pole input and the motor live wire of terminal X2 as motor; Terminal X5 is as 220V forceful electric power power cathode and motor zero line; Between live wire and zero line, incorporate piezo-resistance VR1, filter capacitor C8, discharge resistance R13 into.
The chopping regulating speed plate 52 of above-mentioned arrangements for speed regulation 5 can separate design with outer machine mainboard 6 separately, as accompanying drawing 1, also can develop on a pcb board with outer machine mainboard is synthetic.Above-mentioned arrangements for speed regulation 5 and existing low temperature arrangements for speed regulation difference are not adopt the pressure sensor and the temperature sensor of traditional cost costliness, but adopted the usual pressure switch of using always in the air-conditioning system 51, regulate the rotating speed of outer blower fan by the make-and-break signal that detects pressure switch, thereby realize the cryogenic refrigeration function.
For example, if on a air-conditioning system, need to increase the cryogenic refrigeration function, just only a pressure switch (YK-XMPa/YMPa need welded on the compressor exhaust pipe of air-conditioning system, pressure switch can be according to the difference of system, mate different opening pressure value X and recover force value Y), generally speaking, the opening pressure of pressure switch is 1.7-3.2MP, recovery pressure is 1.2-2.6MP, and opening pressure is 0.4-0.7MP with the difference of recovering pressure.Again the line of pressure switch 51 and outer blower fan are connected on the chopping regulating speed plate 52, when cryogenic refrigeration operating mode running refrigerating, chopping regulating speed plate 52 can be automatically regulated the rotating speed of outer blower fan 4 according to detected pressure switch make-and-break signal and the program that configured, realizes the cryogenic refrigeration purpose.
The operation principle of above-mentioned arrangements for speed regulation 5 is: utilize outer machine mainboard 6 to provide+the 12V direct current for chopping regulating speed plate 52, supply with master controller 521 and each functional circuit through output+5V direct current behind the regulator block in the power circuit 523.Zero cross detection circuit 525 on the chopping regulating speed plate 52 detects the zero crossing of 220V AC power 7 voltages earlier, with this zero crossing is the counting starting point, controllable silicon is carried out switch control, thereby the action time of control 220V alternating current external blower fan 4 in one-period, and then reach the purpose of regulating outer blower fan 4 speed.Chopping regulating speed plate 52 can require according to the gear of the outer machine mainboard 6 of RS485 communication acquisition to determine to count to count, and outer blower fan 4 is operated on the predetermined gear, realizes single chopping regulating speed function.Chopping regulating speed plate 52 also can be determined the gear requirement according to the on off state and the logical program of pressure switch 51, does corresponding outer blower fan speed governing then.
Pressure detection switch signal wave circuit processing after filtration is input on the PA4-HS-pin of master controller 521, master controller 521 is controlled the pwm signal of outer blower fan 4 through pin-HS-PB4 output again according to the state of pressure switch 51, signal is controlled the rotating speed of outer blower fan through photoelectrical coupler and ghyristor circuit, (alternating current is received the H shelves of motor, the duty that changes pwm signal is recently controlled the speed of outer blower fan), the master controller time is gathered counting by zero cross detection circuit 525.Such as the master controller 1S that need delay time, need detect zero passage with regard to master controller so and count and just be 1S N=1/0.02=50 time, alternating current is 50HZ.Master controller 521 communicates by RS485 bus and outer machine mainboard 6, and 523 of power circuits adopt 7805 power supply chip output+5V voltages (+12V power supply is provided by outer machine mainboard 6).
The hardware requirement of chopping regulating speed plate 52:
6 of chopping regulating speed plate 52 and outer machine mainboards adopt the RS485 communication modes, and give the chopping regulating speed plate for 12V voltage by outer machine mainboard 6.
220V voltage on the chopping regulating speed plate 52 is directly provided by power supply 7, and outer blower fan 4 high wind shelves (H shelves) are received on the chopping regulating speed plate 52, in low wind shelves (M shelves and L shelves) do not connect.
Also can increase a malfunction indicator lamp on the chopping regulating speed plate.
The control logic of the logical program in the master controller 521 is as follows:
When chopping regulating speed plate 52 and outer machine mainboard 6 communications just often, the malfunction indicator lamp sudden strain of a muscle on the chopping regulating speed plate 52; When chopping regulating speed plate 52 communication failure occurs with outer machine mainboard 6, to do to shut down and handle, outer blower fan 4 stops the back at compressor 1 and delays time and stopped the malfunction indicator lamp Chang Liang on the speed adjusting plate, (manual operator is reported the E6 fault) again in 15 seconds.
When pressing the closing key shutdown, outer blower fan 4 stops the back time-delay at compressor 1 and stopped in 15 seconds again.
As a preferable example, chopping regulating speed plate 52 is divided into 6 grades with outer blower fan rotating speed, 100%, 90%, 70%, 50%, 35%, the 20% air quantity output of promptly high tap position rotating speed, the most high-grade is 6, deep low gear is 1, and from 6 grades to 1 grade, air quantity output constantly reduces.
In the above-mentioned example, chopping regulating speed plate 52 is divided into 6 grades with outer blower fan rotating speed, in fact, also can be divided into 4 grades, 5 grades or more gears, and how much can setting as required of gear specifically is set.
Certainly, the utility model can also have other simple deformation.In a word, doing conspicuous change according to the prompting of the foregoing description, and other every changes that do not break away from the utility model essence, all should be included within the described scope of claim.
Claims (9)
1, arrangements for speed regulation is characterized in that, comprise
Pressure switch, it is installed on the gas exhaust piping of air-conditioning compressor;
The chopping regulating speed plate, pressure switch signal input interface, power circuit, RS485 communication module, zero cross detection circuit and motor control signal output module that it further comprises master controller and is connected with master controller, the chopping regulating speed plate is by the outer machine mainboard communication of RS485 communication module and air-conditioning system; The chopping regulating speed plate receives the status information of pressure switch by the pressure switch signal input interface; Store logical program in the described master controller, described power circuit connects the outer machine mainboard of air-conditioning system.
2, arrangements for speed regulation according to claim 1,
It is characterized in that:
The master controller output pwm signal, described pwm signal is through photoelectrical coupler and the outer blower fan rotating speed of ghyristor circuit control.
3, arrangements for speed regulation according to claim 1,
It is characterized in that:
The opening pressure of described pressure switch is 1.7-3.2MP, and recovery pressure is 1.2-2.6MP, and opening pressure is 0.4-0.7MP with the difference of recovering pressure.
4, arrangements for speed regulation according to claim 1,
It is characterized in that:
Described chopping regulating speed plate is divided into the N shelves with the rotating speed of outer blower fan, the different weight percentage of the outer blower fan maximum (top) speed of each gear correspondence, and wherein N is greater than 3.
5, arrangements for speed regulation according to claim 4,
It is characterized in that:
N=6, wherein not other corresponding 100%, 90%, 70%, 50%, 35% and 20% the outer blower fan maximum (top) speed of 6 grades to 1 grade wind.
6, air-conditioning system comprises the compressor that connects into the closed-loop path, indoor heat exchanger, outdoor heat exchanger, off-premises station mainboard, outer blower fan and the external blower fan arrangements for speed regulation that carry out speed governing,
It is characterized in that:
Described arrangements for speed regulation comprise:
Pressure switch, it is installed on the gas exhaust piping of air-conditioning compressor;
The chopping regulating speed plate, pressure switch signal input interface, power circuit, RS485 communication module, zero cross detection circuit and motor control signal output module that it further comprises master controller and is connected with master controller, the chopping regulating speed plate is by the outer machine mainboard communication of RS485 communication module and air-conditioning system; The chopping regulating speed plate receives the status information of pressure switch by the pressure switch signal input interface; Store logical program in the described master controller, described power circuit connects the outer machine mainboard of air-conditioning system.
7, air-conditioning system according to claim 6,
It is characterized in that:
The opening pressure of described pressure switch is 1.7-3.2MP, and recovery pressure is 1.2-2.6MP, and opening pressure is 0.4-0.7MP with the difference of recovering pressure.
8, air-conditioning system according to claim 6,
It is characterized in that:
Described chopping regulating speed plate is divided into the N shelves with the rotating speed of outer blower fan, the different weight percentage of the outer blower fan maximum (top) speed of each gear correspondence, and wherein N is greater than 3.
9, air-conditioning system according to claim 8,
It is characterized in that:
N=6, wherein not other corresponding 100%, 90%, 70%, 50%, 35% and 20% the outer blower fan maximum (top) speed of 6 grades to 1 grade wind.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202043800U CN201348340Y (en) | 2008-11-28 | 2008-11-28 | Speed regulating device and air conditioning system using same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202043800U CN201348340Y (en) | 2008-11-28 | 2008-11-28 | Speed regulating device and air conditioning system using same |
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| CN201348340Y true CN201348340Y (en) | 2009-11-18 |
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| CNU2008202043800U Expired - Lifetime CN201348340Y (en) | 2008-11-28 | 2008-11-28 | Speed regulating device and air conditioning system using same |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806310A (en) * | 2010-03-11 | 2010-08-18 | 何振俊 | Temperature regulating control cabinet |
| CN101556069B (en) * | 2008-11-28 | 2012-04-11 | 珠海格力电器股份有限公司 | Speed regulating device, air conditioning system and speed regulating method of air conditioning system |
| CN103486687A (en) * | 2012-06-12 | 2014-01-01 | 珠海格力电器股份有限公司 | protection method and protection device of air conditioning system |
| CN104406211A (en) * | 2014-11-27 | 2015-03-11 | 苏州市职业大学 | Device capable of reducing stop abnormal sound of range hood |
| CN104539213A (en) * | 2014-11-28 | 2015-04-22 | 广东美的制冷设备有限公司 | Motor rotating speed adjusting method, motor rotating speed adjusting system, and air conditioner |
| CN104534615A (en) * | 2014-11-28 | 2015-04-22 | 广东美的制冷设备有限公司 | Rotating speed adjusting method and system of motor and air conditioner |
| CN105508279A (en) * | 2016-01-14 | 2016-04-20 | 合肥天鹅制冷科技有限公司 | Condensate fan with multi-air-speed function |
| CN107525218A (en) * | 2017-07-27 | 2017-12-29 | 奥克斯空调股份有限公司 | A kind of self-adaptation control method and system of A/C pressure switch wiring |
| CN111397122A (en) * | 2020-03-23 | 2020-07-10 | 珠海格力电器股份有限公司 | Air conditioner control method and device and air conditioner |
| US10941955B2 (en) | 2017-10-27 | 2021-03-09 | Dometic Sweden Ab | Systems, methods, and apparatuses for providing communications between climate control devices in a recreational vehicle |
| US11254183B2 (en) | 2017-08-25 | 2022-02-22 | Dometic Sweden Ab | Recreational vehicle, cooling device, controlling system and method for controlling the cooling device |
| CN115371200A (en) * | 2022-08-09 | 2022-11-22 | 珠海格力电器股份有限公司 | Air conditioner discharging method and device, storage medium and air conditioner |
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2008
- 2008-11-28 CN CNU2008202043800U patent/CN201348340Y/en not_active Expired - Lifetime
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101556069B (en) * | 2008-11-28 | 2012-04-11 | 珠海格力电器股份有限公司 | Speed regulating device, air conditioning system and speed regulating method of air conditioning system |
| CN101806310A (en) * | 2010-03-11 | 2010-08-18 | 何振俊 | Temperature regulating control cabinet |
| CN103486687B (en) * | 2012-06-12 | 2015-11-25 | 珠海格力电器股份有限公司 | protection method and protection device of air conditioning system |
| CN103486687A (en) * | 2012-06-12 | 2014-01-01 | 珠海格力电器股份有限公司 | protection method and protection device of air conditioning system |
| CN104406211A (en) * | 2014-11-27 | 2015-03-11 | 苏州市职业大学 | Device capable of reducing stop abnormal sound of range hood |
| CN104539213B (en) * | 2014-11-28 | 2017-04-19 | 广东美的制冷设备有限公司 | Motor rotating speed adjusting method, motor rotating speed adjusting system, and air conditioner |
| CN104534615A (en) * | 2014-11-28 | 2015-04-22 | 广东美的制冷设备有限公司 | Rotating speed adjusting method and system of motor and air conditioner |
| CN104539213A (en) * | 2014-11-28 | 2015-04-22 | 广东美的制冷设备有限公司 | Motor rotating speed adjusting method, motor rotating speed adjusting system, and air conditioner |
| CN104534615B (en) * | 2014-11-28 | 2017-06-09 | 广东美的制冷设备有限公司 | Motor speed adjusting method, motor speed regulating system and air-conditioner |
| CN105508279A (en) * | 2016-01-14 | 2016-04-20 | 合肥天鹅制冷科技有限公司 | Condensate fan with multi-air-speed function |
| CN107525218A (en) * | 2017-07-27 | 2017-12-29 | 奥克斯空调股份有限公司 | A kind of self-adaptation control method and system of A/C pressure switch wiring |
| CN107525218B (en) * | 2017-07-27 | 2019-10-18 | 奥克斯空调股份有限公司 | A kind of self-adaptation control method and system of A/C pressure switch wiring |
| US11254183B2 (en) | 2017-08-25 | 2022-02-22 | Dometic Sweden Ab | Recreational vehicle, cooling device, controlling system and method for controlling the cooling device |
| US11919363B2 (en) | 2017-08-25 | 2024-03-05 | Dometic Sweden Ab | Recreational vehicle, cooling device, controlling system and method for controlling the cooling device |
| US10941955B2 (en) | 2017-10-27 | 2021-03-09 | Dometic Sweden Ab | Systems, methods, and apparatuses for providing communications between climate control devices in a recreational vehicle |
| CN111397122A (en) * | 2020-03-23 | 2020-07-10 | 珠海格力电器股份有限公司 | Air conditioner control method and device and air conditioner |
| CN111397122B (en) * | 2020-03-23 | 2021-05-04 | 珠海格力电器股份有限公司 | Air conditioner control method and device and air conditioner |
| CN115371200A (en) * | 2022-08-09 | 2022-11-22 | 珠海格力电器股份有限公司 | Air conditioner discharging method and device, storage medium and air conditioner |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20091118 Effective date of abandoning: 20081128 |