CN103791585A - Method for controlling external direct current fan of cabinet air conditioner - Google Patents
Method for controlling external direct current fan of cabinet air conditioner Download PDFInfo
- Publication number
- CN103791585A CN103791585A CN201410021294.6A CN201410021294A CN103791585A CN 103791585 A CN103791585 A CN 103791585A CN 201410021294 A CN201410021294 A CN 201410021294A CN 103791585 A CN103791585 A CN 103791585A
- Authority
- CN
- China
- Prior art keywords
- direct current
- blower fan
- speed
- outer blower
- time
- 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.)
- Granted
Links
Images
Abstract
The method discloses a method for controlling an external direct current fan of a cabinet air conditioner. The method includes the steps that the rotating speed of the external direct current fan is initialized and kept for n hours, and the temperature Tc of the middle of a condenser is detected; when Tc >Tcm, the rotating speed is controlled to be increased; when Tc<=T1, the external direct current fan is switched off; when T1<Tc<T2, the rotating speed psi of the external direct current fan is equal to ((Tc-Td) *a+b)*100%; when Tc>=T2, the external direct current fan is operated at full speed; when Tc<=Tcm, the rotating speed is controlled to be decreased; when Tc<=T1-T0, the external direct current fan is switched off; when T1-T0<Tc<T2-T0, the rotating speed psi of the external direct fan is equal to ((Tc-Td)*a+b)*100%; when Tc>=T2-T0, the external direct current fan is operated at full speed. The method for controlling the external direct current fan has the advantages that a refrigerating system of the air conditioner can be efficiently and reliably operated and saves energy and is low in noise in the operating process.
Description
Technical field
the present invention relates to a kind of air conditioner refrigerating technical field, the control method of the outer blower fan of especially a kind of cabinet air conditioner direct current.
Background technology
along with the development of Communication in China industry, cabinet air conditioner is widely used in Miniature communication base station as Local cooling, but the outer blower fan of existing product uses AC blower fan conventionally, rotating speed cannot regulate, only having standard-sized sheet and stop two kinds of operational modes, is just that some products have used DC fan, and its rotating speed control mode is general only carries out associated control with outdoor environment temperature, the high rotation speed of fan of outdoor environment temperature is high, and the low rotation speed of fan of outdoor environment temperature is also low; This type of air-blower control mode can not detect the running status of refrigeration system well, for example, when when condenser, because occur compared with serious dirty blocking up, heat transfer effect is poor, this type of air-blower control mode cannot improve rotation speed of fan and strengthen heat exchange, finally cause system and dwindle service life because of long-term overlond running, even may cause compressor damage.And the control mode of the outer blower fan of existing direct current cannot guarantee that owing to detecting in real time the running status of refrigeration system the each parts of refrigeration system efficiently move, can not meet the aim of country's call energy-saving and emission-reduction.Therefore, be badly in need of proposing the control method of the outer blower fan of a kind of direct current, realize the operation of cabinet air conditioner high efficient and reliable.
Summary of the invention
the present invention seeks to: the control method that a kind of outer blower fan of cabinet air conditioner direct current of efficient, reliable, energy-conservation and low noise is provided.
technical scheme of the present invention is: the control method of the outer blower fan of a kind of cabinet air conditioner direct current, and the outer blower fan of this direct current adopts the outer blower fan of direct current that can linear speed regulation, it is characterized in that, and the control method of its rotating speed comprises:
initialize the outer rotation speed of fan of direct current, and keep after the n time, detect condenser middle part temperature T c;
(1) work as Tc>Tcm, rise of rotational speed control;
in the time of Tc≤T1, illustrate that now condenser heat dissipation capacity is little, be not less than the desired minimum pressure at expulsion of compressor stable operation in order to ensure condensing pressure, consider energy-conservation and quiet operation simultaneously, close the outer blower fan of direct current;
in the time of T1<Tc<T2, in order to guarantee that air-conditioning system is all the time in the most efficient running status, and consider to adopt etiquette mode to move, regulate in real time the rotating speed of the outer blower fan of direct current according to the actual load of condenser, now rotating speed ψ=[(Tc-Td) * a+b] * 100%;
in the time of Tc>=T2, illustrate that now condenser duty is very large, need to strengthen its heat exchange amount, therefore need the outer blower fan full speed running of direct current, guarantee that condensing pressure does not exceed the highest pressure at expulsion of compressor stable operation requirement;
(2), as Tc≤Tcm, rotating speed declines and controls;
in the time of Tc≤T1-T0, illustrate that now condenser heat dissipation capacity is little, be not less than the desired minimum pressure at expulsion of compressor stable operation in order to ensure condensing pressure, consider energy-conservation and quiet operation simultaneously, close the outer blower fan of direct current;
in the time of T1-T0<Tc<T2-T0, in order to guarantee that air-conditioning system is all the time in the most efficient running status, and consider to adopt etiquette mode to move, regulate in real time the rotating speed of the outer blower fan of direct current according to the actual load of condenser, now rotating speed ψ=[(Tc-Td) * a+b] * 100%;
in the time of Tc>=T2-T0, illustrate that now condenser duty is very large, need to strengthen its heat exchange amount, therefore need the outer blower fan full speed running of direct current, guarantee that condensing pressure does not exceed the highest pressure at expulsion of compressor stable operation requirement;
wherein Tcm is the condenser middle part temperature before the m time; T1 is saturation temperature corresponding to the required minimum pressure at expulsion of compressor; T2 is saturation temperature corresponding to compressor the highest required pressure at expulsion; Td is under metric system cold test operating mode, corresponding condenser middle part temperature that the outer rotation speed of fan of direct current is maximum (top) speed 80% time; A and b are corrected parameter; T0 is the temperature return difference value of rotating speed control.
preferably, relevant physical parameter smooth change when guaranteeing that refrigeration system starts, especially pressure at expulsion vibration is little, the initial speed of setting the outer blower fan of described direct current is ψ s, and for convenient, state before refrigeration system startup is predicted initial speed is carried out associated with condenser middle part temperature T c, as Tc>45 ℃, ψ s is 70%～80% of the outer blower fan maximum (top) speed ψ max of direct current; When 25 ℃ of <Tc≤45 ℃, ψ s is 50%～60% of the outer blower fan maximum (top) speed ψ max of direct current; When Tc≤25 ℃, ψ s is 30～40% of the outer blower fan maximum (top) speed ψ max of direct current; And n=3mins.
preferably, corrected parameter a and b are under the multiple operating condition of test, setting the outer rotation speed of fan of different direct currents makes refrigeration system in the most efficient running status, and record condenser middle part temperature now, by the matching to the optimum speed recording under different operating modes and condenser middle part temperature data, obtain the value of parameter a and b, and a=0.01～0.04, b=0.5～0.9.
preferably, T0 is 5～10 ℃.
more preferably, for the running status of Real-Time Monitoring air-conditioning refrigeration system, the sense cycle of the outer rotation speed of fan control of described direct current is the m time, m=1～2mins.
advantage of the present invention is: control method of the present invention mainly comprises rise of rotational speed control and rotating speed decline control, and this rise of rotational speed control and rotating speed decline control include direct current exogenous wind office and close, regulate in real time the outer blower fan of direct current and the outer three kinds of control modes of blower fan full speed running of direct current, and regulate by the rotating speed of the external blower fan of real-time detection condenser middle part temperature, reach efficient, reliable, the energy-conservation and low noise operation of air-conditioning refrigeration system.
Accompanying drawing explanation
below in conjunction with drawings and Examples, the invention will be further described:
fig. 1 is the control method flow chart of the outer blower fan of cabinet air conditioner direct current of the present invention.
The specific embodiment
should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
embodiment: shown in Fig. 1, the control method of the outer blower fan of a kind of cabinet air conditioner direct current, the outer blower fan of this direct current adopts the outer blower fan of direct current that can linear speed regulation, and the control method of its rotating speed comprises:
first open air-conditioning refrigeration system, detect condenser middle part temperature T c, initialize the outer rotation speed of fan of direct current according to the condenser middle part temperature T c detecting, and keep the 3mins time, again detect condenser middle part temperature T c; Minimum and the highest pressure at expulsion that the present embodiment requires while considering compressor stable operation is also guaranteed air-conditioning refrigeration system safe and reliable operation, gets T1=25 ℃, T2=55 ℃.
(1) middle part of the condenser before Tc>Tcm(Tcm is 1mins time temperature) rise of rotational speed control;
in the time of Tc≤25 ℃, illustrate that now condenser heat dissipation capacity is little, be not less than the desired minimum pressure at expulsion of compressor stable operation in order to ensure condensing pressure, consider energy-conservation and quiet operation simultaneously, close the outer blower fan of direct current;
in the time of 25 ℃ <Tc<55 ℃, in order to guarantee that air-conditioning system is all the time in the most efficient running status, and consider to adopt etiquette mode to move, regulate in real time the rotating speed of the outer blower fan of direct current according to the actual load of condenser, now rotating speed ψ=[(Tc-Td) * a+b] * 100%;
in the time of Tc>=55 ℃, illustrate that now condenser duty is very large, need to strengthen its heat exchange amount, therefore need the outer blower fan full speed running of direct current, guarantee that condensing pressure does not exceed the highest pressure at expulsion of compressor stable operation requirement;
(2), as Tc≤Tcm, rotating speed declines and controls;
guarantee that outer blower fan too frequently do not cut out or full speed running, the present embodiment Selecting All Parameters T0=8 ℃.
in the time of Tc≤17 ℃, illustrate that now condenser heat dissipation capacity is little, be not less than the desired minimum pressure at expulsion of compressor stable operation in order to ensure condensing pressure, consider energy-conservation and quiet operation simultaneously, close the outer blower fan of direct current;
in the time of 17 ℃ <Tc<47 ℃, in order to guarantee that air-conditioning system is all the time in the most efficient running status, and consider to adopt etiquette mode to move, regulate in real time the rotating speed of the outer blower fan of direct current according to the actual load of condenser, now rotating speed ψ=[(Tc-Td) * a+b] * 100%;
in the time of Tc>=47 ℃, illustrate that now condenser duty is very large, need to strengthen its heat exchange amount, therefore need the outer blower fan full speed running of direct current, guarantee that condensing pressure does not exceed the highest pressure at expulsion of compressor stable operation requirement;
wherein Td is under metric system cold test operating mode, condenser middle part temperature, in the present embodiment Td=45 ℃ when the outer rotation speed of fan of setting direct current is 80%; Wherein coefficient a and b are under the multiple outdoor environment temperature of test, regulate the outer rotation speed of fan of direct current to make refrigeration system in optimum efficiency operational mode, the outer rotation speed of fan of record direct current now and condenser middle part temperature, by being carried out to matching, related data draws, as relative recording data under the test operating mode of following table:
| Outdoor environment temperature (℃) | Outer rotation speed of fan | Actual measurement condensation temperature (℃) |
| 15 | 38% | 24.5 |
| 18 | 45% | 27.6 |
| 21 | 55% | 32.4 |
| 24 | 57% | 33.5 |
| 27 | 65% | 38.1 |
| 30 | 70% | 40.5 |
| 33 | 78% | 43.9 |
| 36 | 82% | 45.8 |
| 39 | 90% | 50.1 |
by being carried out to matching, above data draw a=0.02, b=0.8.
relevant physical parameter smooth change when guaranteeing that refrigeration system starts, especially pressure at expulsion vibration is little, the initial speed of setting the outer blower fan of described direct current is ψ s, and for convenient, state before refrigeration system startup is predicted initial speed is carried out associated with condenser middle part temperature T c, as Tc>45 ℃, ψ s is 70%～80% of the outer blower fan maximum (top) speed ψ max of direct current; When 25 ℃ of <Tc≤45 ℃, ψ s is 50%～60% of the outer blower fan maximum (top) speed ψ max of direct current; When Tc≤25 ℃, ψ s is 30～40% of the outer blower fan maximum (top) speed ψ max of direct current; And n=3mins.
for the running status of Real-Time Monitoring air-conditioning refrigeration system, the sense cycle m of the present embodiment China and foreign countries rotation speed of fan control is 1mins.
the above, the only specific embodiment for inventing.Protection scope of the present invention is not limited to this, any be familiar with those skilled in the art the present invention disclose technical scope in, the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claim was defined.
Claims (5)
1. a control method for the outer blower fan of cabinet air conditioner direct current, the outer blower fan of this direct current adopts the outer blower fan of direct current that can linear speed regulation, it is characterized in that, and the control method of its rotating speed comprises:
Initialize the outer rotation speed of fan of direct current, and keep after the n time, detect condenser middle part temperature T c;
(1) work as Tc>Tcm, rise of rotational speed control;
In the time of Tc≤T1, close the outer blower fan of direct current; In the time of T1<Tc<T2, outer rotation speed of fan ψ=[(Tc-Td) the * a+b] * 100% of direct current; In the time of Tc >=T2, the outer blower fan full speed running of direct current;
(2), as Tc≤Tcm, rotating speed declines and controls;
In the time of Tc≤T1-T0, close the outer blower fan of direct current; In the time of T1-T0<Tc<T2-T0, outer rotation speed of fan ψ=[(Tc-Td) the * a+b] * 100% of direct current; In the time of Tc >=T2-T0, the outer blower fan full speed running of direct current;
Wherein Tcm is the condenser middle part temperature before the m time; T1 is saturation temperature corresponding to the required minimum pressure at expulsion of compressor; T2 is saturation temperature corresponding to compressor the highest required pressure at expulsion; Td is under metric system cold test operating mode, corresponding condenser middle part temperature that the outer rotation speed of fan of direct current is maximum (top) speed 80% time; A and b are corrected parameter; T0 is the temperature return difference value of rotating speed control.
2. the control method of the outer blower fan of cabinet air conditioner direct current according to claim 1, is characterized in that, the initial speed of the outer blower fan of described direct current is ψ s, and as Tc>45 ℃, ψ s is 70%～80% of the outer blower fan maximum (top) speed ψ max of direct current; When 25 ℃ of <Tc≤45 ℃, ψ s is 50%～60% of the outer blower fan maximum (top) speed ψ max of direct current; When Tc≤25 ℃, ψ s is 30～40% of the outer blower fan maximum (top) speed ψ max of direct current; And n=3mins.
3. the control method of the outer blower fan of cabinet air conditioner direct current according to claim 1, is characterized in that a=0.01～0.04, b=0.5～0.9.
4. the control method of the outer blower fan of cabinet air conditioner direct current according to claim 1, is characterized in that, T0 is 5～10 ℃.
5. according to the control method of the outer blower fan of the cabinet air conditioner direct current described in claim 1 to 4 any one, it is characterized in that, the sense cycle of the outer rotation speed of fan control of described direct current is the m time, m=1～2mins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410021294.6A CN103791585B (en) | 2014-01-17 | 2014-01-17 | The control method of the outer blower fan of a kind of cabinet air conditioner direct current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410021294.6A CN103791585B (en) | 2014-01-17 | 2014-01-17 | The control method of the outer blower fan of a kind of cabinet air conditioner direct current |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103791585A true CN103791585A (en) | 2014-05-14 |
| CN103791585B CN103791585B (en) | 2016-04-20 |
Family
ID=50667493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410021294.6A Active CN103791585B (en) | 2014-01-17 | 2014-01-17 | The control method of the outer blower fan of a kind of cabinet air conditioner direct current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103791585B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748326A (en) * | 2015-03-17 | 2015-07-01 | 广东申菱空调设备有限公司 | Chilled water precision air conditioner and energy-conservation control method thereof |
| CN105240987A (en) * | 2014-07-08 | 2016-01-13 | 青岛海尔空调器有限总公司 | Air conditioner and pressure relief control circuit and method thereof |
| CN106091298A (en) * | 2016-08-19 | 2016-11-09 | 广东美的暖通设备有限公司 | The control method of air-conditioner, control device and air-conditioner |
| CN107062542A (en) * | 2017-04-07 | 2017-08-18 | 广东美的暖通设备有限公司 | Air-conditioning system and its control method of outdoor fan, device |
| CN107906682A (en) * | 2017-11-03 | 2018-04-13 | 广东美的暖通设备有限公司 | A kind of control method of air-conditioning system, device and air conditioner |
| CN108779939A (en) * | 2016-03-22 | 2018-11-09 | 三菱电机株式会社 | Refrigerating plant |
| CN109341006A (en) * | 2017-08-01 | 2019-02-15 | 奥克斯空调股份有限公司 | Convertible frequency air-conditioner control device and control method |
| CN109667731A (en) * | 2017-10-17 | 2019-04-23 | 中车株洲电力机车研究所有限公司 | A kind of control method and device of Wind turbines auxiliary motor |
| CN111023393A (en) * | 2019-11-15 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Control method and system of outdoor fan and air conditioner |
| CN111750506A (en) * | 2020-07-06 | 2020-10-09 | 深圳市英维克科技股份有限公司 | Control system and control method of condensing fan |
| CN114061067A (en) * | 2020-08-07 | 2022-02-18 | 美的集团股份有限公司 | Wind gear adjusting method, air conditioner and storage medium |
| CN114754475A (en) * | 2022-05-20 | 2022-07-15 | 深圳市英维克科技股份有限公司 | Air conditioner operation control method, operation device, air conditioner and storage medium |
| CN114754475B (en) * | 2022-05-20 | 2024-04-19 | 深圳市英维克科技股份有限公司 | Air conditioner operation control method, operation device, air conditioner and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006234329A (en) * | 2005-02-25 | 2006-09-07 | Mitsubishi Heavy Ind Ltd | Air conditioning system |
| JP2009109113A (en) * | 2007-10-31 | 2009-05-21 | Daikin Ind Ltd | Air conditioner |
| CN101650064A (en) * | 2008-08-14 | 2010-02-17 | 海尔集团公司 | Low-temperature refrigeration air conditioner and wind speed control method thereof |
| CN101893308A (en) * | 2010-07-08 | 2010-11-24 | 宁波奥克斯电气有限公司 | Method for controlling outdoor fan of air-conditioner |
| CN103175285A (en) * | 2013-03-26 | 2013-06-26 | 广东美的制冷设备有限公司 | Control circuit and control method of air-conditioner outdoor draught fan and air-conditioner |
-
2014
- 2014-01-17 CN CN201410021294.6A patent/CN103791585B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006234329A (en) * | 2005-02-25 | 2006-09-07 | Mitsubishi Heavy Ind Ltd | Air conditioning system |
| JP2009109113A (en) * | 2007-10-31 | 2009-05-21 | Daikin Ind Ltd | Air conditioner |
| CN101650064A (en) * | 2008-08-14 | 2010-02-17 | 海尔集团公司 | Low-temperature refrigeration air conditioner and wind speed control method thereof |
| CN101893308A (en) * | 2010-07-08 | 2010-11-24 | 宁波奥克斯电气有限公司 | Method for controlling outdoor fan of air-conditioner |
| CN103175285A (en) * | 2013-03-26 | 2013-06-26 | 广东美的制冷设备有限公司 | Control circuit and control method of air-conditioner outdoor draught fan and air-conditioner |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240987A (en) * | 2014-07-08 | 2016-01-13 | 青岛海尔空调器有限总公司 | Air conditioner and pressure relief control circuit and method thereof |
| CN104748326A (en) * | 2015-03-17 | 2015-07-01 | 广东申菱空调设备有限公司 | Chilled water precision air conditioner and energy-conservation control method thereof |
| CN108779939B (en) * | 2016-03-22 | 2021-02-09 | 三菱电机株式会社 | Refrigerating device |
| CN108779939A (en) * | 2016-03-22 | 2018-11-09 | 三菱电机株式会社 | Refrigerating plant |
| CN106091298A (en) * | 2016-08-19 | 2016-11-09 | 广东美的暖通设备有限公司 | The control method of air-conditioner, control device and air-conditioner |
| CN106091298B (en) * | 2016-08-19 | 2020-03-06 | 广东美的暖通设备有限公司 | Control method and control device of air conditioner and air conditioner |
| CN107062542B (en) * | 2017-04-07 | 2019-08-30 | 广东美的暖通设备有限公司 | Air-conditioning system and its control method of outdoor fan, device |
| CN107062542A (en) * | 2017-04-07 | 2017-08-18 | 广东美的暖通设备有限公司 | Air-conditioning system and its control method of outdoor fan, device |
| CN109341006A (en) * | 2017-08-01 | 2019-02-15 | 奥克斯空调股份有限公司 | Convertible frequency air-conditioner control device and control method |
| CN109667731A (en) * | 2017-10-17 | 2019-04-23 | 中车株洲电力机车研究所有限公司 | A kind of control method and device of Wind turbines auxiliary motor |
| CN107906682A (en) * | 2017-11-03 | 2018-04-13 | 广东美的暖通设备有限公司 | A kind of control method of air-conditioning system, device and air conditioner |
| CN111023393A (en) * | 2019-11-15 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Control method and system of outdoor fan and air conditioner |
| CN111750506A (en) * | 2020-07-06 | 2020-10-09 | 深圳市英维克科技股份有限公司 | Control system and control method of condensing fan |
| CN114061067A (en) * | 2020-08-07 | 2022-02-18 | 美的集团股份有限公司 | Wind gear adjusting method, air conditioner and storage medium |
| CN114754475A (en) * | 2022-05-20 | 2022-07-15 | 深圳市英维克科技股份有限公司 | Air conditioner operation control method, operation device, air conditioner and storage medium |
| CN114754475B (en) * | 2022-05-20 | 2024-04-19 | 深圳市英维克科技股份有限公司 | Air conditioner operation control method, operation device, air conditioner and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103791585B (en) | 2016-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103791585A (en) | Method for controlling external direct current fan of cabinet air conditioner | |
| CN107062518B (en) | Air conditioner control method and control device | |
| CN107975909B (en) | Air conditioner standby machine starting control method and device and computer readable storage medium | |
| CN103196214B (en) | Method for controlling indoor machine of air conditioner and indoor machine of air conditioner | |
| CN103574835B (en) | The control method of outdoor fan of air conditioner and device | |
| CN104764140A (en) | Method for controlling condensing pressure of refrigeration air-conditioning unit | |
| CN102777981B (en) | Energy-saving air-conditioning system used for communication base station and capable of supplying air in object-oriented mode and running method thereof | |
| CN106594982B (en) | The fan linkage formula Defrost method of air-conditioning | |
| CN105091230A (en) | Double-cross-flow air conditioner as well as fan control device and method of double-cross-flow air conditioner | |
| CN104634063A (en) | Control method of refrigerator, control device of refrigerator and refrigerator | |
| CN204128064U (en) | A kind of energy-saving precision air-conditioning | |
| CN102012075A (en) | Control method of multi-split air conditioner | |
| CN104896626A (en) | Refrigeration control method of air-cooled chiller unit, control device and unit system | |
| CN2811873Y (en) | Heat radiator for air conditioner compressor | |
| CN205208841U (en) | Air conditioner | |
| CN106568161A (en) | Air conditioner heating running control method | |
| CN109489335A (en) | Refrigerator blower control method | |
| CN101520223B (en) | Energy-saving control method for auxiliary temperature-reducing heat-exchange device of air conditioner | |
| CN105091458A (en) | Air-cooled refrigerator and control method thereof | |
| CN110553369B (en) | Multi-fan cooling tower control method, cooling tower and air conditioner | |
| CN110567209A (en) | control device and method for detecting blockage of condenser and refrigeration equipment | |
| CN110953684A (en) | Control method of air conditioner cooling system and air conditioner | |
| CN102563799A (en) | Temperature protection device for controller of outdoor unit of viable-frequency air conditioner | |
| CN204391575U (en) | A kind of reduction power consumption power distribution cabinet | |
| CN211177483U (en) | Frequency conversion energy-saving transformation system suitable for precision air conditioner of fixed-frequency compressor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215137 Shun Lok Road, Taiping Industrial Park, Suzhou, Jiangsu, Xiangcheng District Patentee after: Suzhou black shield environmental Limited by Share Ltd Address before: 215137 Shun Lok Road, Taiping Industrial Park, Suzhou, Jiangsu, Xiangcheng District Patentee before: Hayden Thermal Technology (Suzhou) Co.,Ltd. |