CN103727625A - Starting control method and device for variable-frequency fan of condensing unit - Google Patents
Starting control method and device for variable-frequency fan of condensing unit Download PDFInfo
- Publication number
- CN103727625A CN103727625A CN201210383148.9A CN201210383148A CN103727625A CN 103727625 A CN103727625 A CN 103727625A CN 201210383148 A CN201210383148 A CN 201210383148A CN 103727625 A CN103727625 A CN 103727625A
- Authority
- CN
- China
- Prior art keywords
- frequency
- fan
- blower fan
- condensation unit
- control device
- 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
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000005494 condensation Effects 0.000 claims abstract description 36
- 238000009833 condensation Methods 0.000 claims abstract description 36
- 238000004891 communication Methods 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims description 27
- 230000000052 comparative effect Effects 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010725 compressor oil Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Landscapes
- Air Conditioning Control Device (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention provides a starting control method for a variable-frequency fan of a condensing unit, which comprises the following steps: detecting the condensation pressure of the compressor to obtain the condensation pressure P ; calculating the fan frequency according to the condensing pressure P to obtain the fan frequency F ; and judging whether to start the fan or not according to the comparison result of the fan frequency F and the preset frequency. The invention also provides a starting control device of the variable-frequency fan of the condensing unit, which comprises a pressure sensor, a fan mainboard and a controller, wherein the controller comprises an acquisition module, a calculation module, a judgment module, a storage module and a communication module. The invention judges whether to start the fan or not by comparing the calculated fan frequency with the preset frequency, so that the fan can be started at the corresponding frequency under higher condensing pressure, the high-low pressure difference of the compressor is ensured, the safe start of the compressor is facilitated, and the normal use of the variable frequency fan air-cooled condensing unit is ensured.
Description
Technical field
The present invention relates to air-conditioning control field, particularly relate to the control device of a kind of condensation unit frequency conversion fan startup control method and use thereof.
Background technology
In prior art, the frequency conversion fan of air-conditioning starts the required frequency that direct basis system high pressure is corresponding and starts.And condensation unit starting is special, when environment temperature is very low, starting pressure is lower, and corresponding startup frequency ratio is lower, and frequency conversion fan is difficult to start.
Even and if start with lower pressure, because compressor oil return is by the oil return of height pressure reduction (being exactly Compressor Discharge Pressure and pressure of inspiration(Pi) difference), the low oil return of pressure reduction is just few, lossy compression method machine, when opening condensation fan under low ambient temperature, can cause condensing pressure (system high pressure, i.e. pressure at expulsion) on the low side, height pressure reduction will be on the low side, cause the recirculating oil quantity of compressor few, unfavorable to compressor.
Summary of the invention
Based on this, be necessary the irrationality for prior art existence, provide a kind of condensation unit frequency conversion fan to start the control device of control method and use thereof.
Technical scheme of the present invention is as follows:
A kind of condensation unit frequency conversion fan starts control method, comprises the steps:
Step S100: detect the condensing pressure of compressor, obtain condensing pressure P (n);
Step S200: calculate blower fan frequency according to condensing pressure P (n), obtain blower fan frequency F (n);
Step S300: judge whether to open blower fan according to the comparative result of blower fan frequency F (n) and preset frequency.
In an embodiment, described step S300 comprises the steps: therein
S310: judge that whether blower fan frequency F (n) is less than preset frequency, if be less than preset frequency, enters step S320; If be more than or equal to preset frequency, enter step S330;
Step S320: condensation fan starts control device and sends 0Hz signal to blower fan, and blower fan does not start, and returns to step S100;
Step S330: condensation fan starts control device and sends blower fan frequency F (n) signal, fan starting to blower fan.
In an embodiment, in step S300, described preset frequency is 30Hz to 40Hz therein.
Another object of the present invention is achieved through the following technical solutions:
A kind of condensation unit frequency conversion fan starts control device, described control device comprises the pressure sensor that is arranged on exhaust outlet of compressor place, blower fan mainboard, and being electrically connected to the controller on described pressure sensor and blower fan mainboard, described controller comprises the acquisition module of the condensing pressure for gathering compressor; For calculate the computing module of blower fan frequency according to condensing pressure; With the judge module for judge whether to open blower fan according to the comparative result of blower fan frequency F (n) and preset frequency.
Therein in an embodiment, described controller also comprises,
For store the memory module of predefined preset frequency and time interval T and for owner's plate transmitted signal aweather, control the communication module of fan starting switch.
In an embodiment, described acquisition module is connected with pressure sensor therein.
In an embodiment, described communication module is connected with the blower fan mainboard of controlling fan starting therein.
The invention has the beneficial effects as follows:
The present invention is by comparing to judge whether to open blower fan by the blower fan frequency calculating and preset frequency, blower fan can start with frequency corresponding under higher condensing pressure like this, ensured the height pressure reduction of compressor, be conducive to the clean boot of compressor, guaranteed the normal use of frequency conversion fan air-cooled condensing group.
Accompanying drawing explanation
Below in conjunction with concrete drawings and the specific embodiments, the present invention is further elaborated.
Fig. 1 is the schematic flow sheet that condensation unit frequency conversion fan of the present invention starts an embodiment of control method;
Fig. 2 is the schematic diagram that condensation unit frequency conversion fan of the present invention starts an embodiment of controller.
The specific embodiment
The present invention starts as target with frequency conversion condensation fan to control air-cooled condensing group.Preset a preset frequency, by contrasting current frequency and preset frequency, with this, judge whether to start condensation fan.According to this control method, can avoid blower fan cannot start when the low ambient temperature and low frequency starts the problem of damaging compressor, avoid unnecessary energy waste.
Referring to Fig. 1, the invention provides a kind of condensation unit frequency conversion fan and start control method, comprise the steps:
Step S100: detect the condensing pressure of compressor, obtain condensing pressure P (n); Described step S100 starts to carry out after compressor is opened;
Step S200: calculate blower fan frequency according to condensing pressure P (n), obtain blower fan frequency F (n);
Step S300: judge whether to open blower fan according to the comparative result of blower fan frequency F (n) and preset frequency.
In the present embodiment, in step S200, the formula that calculates blower fan frequency F (n) according to condensing pressure P (n) is:
F(n)=f（l）+[f(h)-f(l)]*（Tc-Tcmin）/(Tcmax-Tcmin)
Wherein Tc is the saturation temperature that condensing pressure P (n) is corresponding.F (h), f (l), Tcmax and Tcmin are respectively highest frequency, low-limit frequency, maximum condensation temperature and the minimum condensation temperature that unit is set
If F (n) > is f(h), machine operation frequency f (n)=f (h)
If F (n) is <f(l), machine operation frequency f (n)=f (l).
Described step S300 comprises the steps:
Step S310: judge that whether blower fan frequency F (n) is less than preset frequency, if be less than preset frequency, enters step S320; If be more than or equal to preset frequency, enter step S330;
Step S320: condensation fan starts control device and sends 0Hz signal to blower fan, and blower fan does not start, and returns to step S100;
Step S330: condensation fan starts control device and sends blower fan frequency F (n) signal, fan starting to blower fan.
In the present embodiment, preset when blower fan frequency is during lower than preset frequency, condensation machine set control device sends 0Hz signal to blower fan, and blower fan does not start, and setting has avoided blower fan cannot start situation about breaking down when frequency is lower like this.
The present embodiment provides a kind of entry condition of condensation unit frequency conversion fan, setting blower fan frequency blower fan when being more than or equal to preset frequency just starts, in the time of can avoiding like this frequency lower, blower fan cannot start situation about breaking down, ensured the height pressure reduction of compressor simultaneously, be conducive to the clean boot of compressor, guarantee the normal use of frequency conversion fan air-cooled condensing group, extended the service life of compressor.
Preferably, as a kind of embodiment, in step S300, described preset frequency is 30Hz to 40Hz.In the present embodiment, preset frequency is set as to 30Hz to 40Hz, because this frequency is the optimum frequency of fan starting, through many experiments, prove, when being greater than 30Hz, blower fan frequency F (n) can start blower fan, preset frequency is set as to 30Hz to 40Hz, can guarantees well to move after fan starting.
Preferably, as a kind of embodiment, in described step S100, at interval of the T time, detect the condensing pressure of first compression machine.In order better to control the start-up time of blower fan, the present embodiment is set at interval of certain hour, need to detect the condensing pressure of first compression machine.Time T in the present embodiment can be set according to actual needs, is generally 5 seconds.
In order to realize above-mentioned frequency conversion condensation fan, start control method, referring to Fig. 2, the present invention also provides a kind of condensation unit frequency conversion fan to start control device, described control device comprises the pressure sensor that is arranged on exhaust outlet of compressor place, blower fan mainboard, and being electrically connected to the controller on described pressure sensor and blower fan mainboard, described controller comprises acquisition module 101, computing module 102, judge module 103, memory module 104 and communication module 105; Described acquisition module 101 is for gathering the condensing pressure of compressor; Described computing module 102 is for calculating blower fan frequency according to condensing pressure, and described judge module 103 is for judging whether to open blower fan according to the comparative result of blower fan frequency F (n) and preset frequency.Described memory module 104 is for storing predefined frequency and time interval T; Described communication module 105, for owner's plate transmitted signal aweather, is controlled fan starting switch.
Control device in the present embodiment is carried out following steps:
Step S100: detect the condensing pressure P (n) of compressor, obtain condensing pressure P (n);
Step S200: calculate blower fan frequency F (n) according to condensing pressure P (n), obtain blower fan frequency F (n);
Step S300: judge whether to open blower fan according to the comparative result of blower fan frequency F (n) and preset frequency.
Preferably, as a kind of embodiment, described acquisition module 101 is connected with the pressure sensor of compressor.The present embodiment arranges pressure sensor and detects the condensing pressure of compressor in the exhaust ports of compressor.More excellent, multiple pressure sensors can be set and get its mean value as condensing pressure value, more accurate like this.
Preferably, as a kind of embodiment, described communication module 105 is connected with the blower fan mainboard of controlling fan starting.Described communication module is used for aweather owner's plate and sends 0Hz or blower fan frequency signal.
In embodiments of the present invention, described controller is mainly by DSP microprocessor (Digital Signal Processing, DSP) integrated circuit control.Preferably, on described integrated circuit (controller), be integrated with " DSP " chip, on described integrated circuit, be also integrated with and meet interlock circuit, the device (for example: the devices such as memory, input and output (I/O)) of embodiment of the present invention modules function, referring to Fig. 2, Fig. 2 has illustrated the structure of DSP microprocessor on controller.Judgement when described controller is mainly used in starting and control are processed.
Those skilled in the art are to be understood that, developer can utilize assembler language or C language to carry out DSP functional development, or for example, is realized the setting of configuration parameter (for example: default time cycle or default time threshold) and realized and started the automatic processing operation of controlling by performing a programme by related software (: MATLAB6.5 version (Release13)).After developer burns dsp chip by program, interlock circuit and DSP are integrated into and on controller, realize complete control circuit.
Further, the condensation unit frequency conversion fan in the embodiment of the present invention starts the controller of control device employing can select dsp chip, also can use micro-control unit (Micro Control Unit, MCU) integrated circuit control.Preferably, be integrated with " AT89C51 " single-chip microcomputer on described integrated circuit, the embodiment of the present invention is not limited to use said chip, about the selection of said chip, belongs to the common practise that those skilled in the art can understand, and the embodiment of the present invention repeats no more this.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. condensation unit frequency conversion fan starts a control method, it is characterized in that:
Comprise the steps:
Step S100: detect the condensing pressure of the compressor of condensation unit, obtain condensing pressure P (n);
Step S200: calculate blower fan frequency according to condensing pressure P (n), obtain blower fan frequency F (n);
Step S300: judge whether to open blower fan according to the comparative result of blower fan frequency F (n) and preset frequency.
2. condensation unit frequency conversion fan according to claim 1 starts control method, it is characterized in that:
Described step S300 comprises the steps:
Step S310, judges that whether blower fan frequency F (n) is less than preset frequency, if be less than preset frequency, enters step S320; If be more than or equal to preset frequency, enter step S330;
Step S320: condensation unit frequency conversion fan starts control device and sends 0Hz signal to blower fan, and blower fan does not start, and returns to step S100;
Step S330: condensation unit frequency conversion fan starts control device and sends blower fan frequency F (n) signal, fan starting to blower fan.
3. condensation unit frequency conversion fan according to claim 1 and 2 starts control method, it is characterized in that:
In step S300, described preset frequency is 30Hz to 40Hz.
4. condensation unit frequency conversion fan according to claim 1 and 2 starts control method, it is characterized in that:
In described step S100, at interval of the T time, detect the condensing pressure of first compression machine.
5. condensation unit frequency conversion fan starts a control device, it is characterized in that:
Described control device comprises the pressure sensor that is arranged on exhaust outlet of compressor place, blower fan mainboard, and be electrically connected to the controller on described pressure sensor and blower fan mainboard, described controller comprises the acquisition module of the condensing pressure for gathering compressor;
For calculate the computing module of blower fan frequency according to condensing pressure;
For judge whether to open the judge module of blower fan according to the comparative result of blower fan frequency F (n) and preset frequency.
6. condensation unit frequency conversion fan according to claim 5 starts control device, it is characterized in that:
Described controller also comprises,
For store the memory module of predefined preset frequency and time interval T and for owner's plate transmitted signal aweather, control the communication module of fan starting switch.
7. condensation unit frequency conversion fan according to claim 5 starts control device, it is characterized in that, described acquisition module is connected with pressure sensor.
8. condensation unit frequency conversion fan according to claim 6 starts control device, it is characterized in that, described communication module is connected with the blower fan mainboard of controlling fan starting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210383148.9A CN103727625B (en) | 2012-10-10 | 2012-10-10 | Starting control method and device for variable-frequency fan of condensing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210383148.9A CN103727625B (en) | 2012-10-10 | 2012-10-10 | Starting control method and device for variable-frequency fan of condensing unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103727625A true CN103727625A (en) | 2014-04-16 |
| CN103727625B CN103727625B (en) | 2016-08-03 |
Family
ID=50451817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210383148.9A Active CN103727625B (en) | 2012-10-10 | 2012-10-10 | Starting control method and device for variable-frequency fan of condensing unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103727625B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764140A (en) * | 2015-03-19 | 2015-07-08 | 珠海格力电器股份有限公司 | Condensing pressure control method for refrigerating air conditioning unit |
| CN105276881A (en) * | 2015-10-15 | 2016-01-27 | 珠海格力电器股份有限公司 | condensing unit operation control method |
| CN105333563A (en) * | 2014-07-29 | 2016-02-17 | 海信（山东）空调有限公司 | Refrigeration control method and device and air conditioner |
| CN105864958A (en) * | 2016-03-31 | 2016-08-17 | 宁波奥克斯电气股份有限公司 | Start control method of multi-gear motor in indoor fan of air conditioner |
| CN106679066A (en) * | 2016-11-17 | 2017-05-17 | 珠海格力电器股份有限公司 | Unit fault judgment method and device |
| CN106949581A (en) * | 2017-02-28 | 2017-07-14 | 深圳市艾特网能技术有限公司 | Frequency-conversion air-conditioning system and its control method |
| CN107178880A (en) * | 2017-07-03 | 2017-09-19 | 珠海格力电器股份有限公司 | method and device for controlling air conditioner |
| CN109458776A (en) * | 2016-10-18 | 2019-03-12 | 珠海格力电器股份有限公司 | Condensing unit operation control method and device and refrigeration equipment with same |
| CN109915990A (en) * | 2019-02-22 | 2019-06-21 | 珠海格力电器股份有限公司 | Method and device for controlling fan and air conditioning system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200986351Y (en) * | 2006-12-13 | 2007-12-05 | 浙江盾安人工环境设备股份有限公司 | Wind cooling cold water air-conditioning unit |
| CN201526483U (en) * | 2009-10-22 | 2010-07-14 | 同济大学 | Variable speed control system for condensate fan |
| CN102466304A (en) * | 2010-11-16 | 2012-05-23 | 力博特公司 | Air-conditioning system and control method of condensation fan thereof |
| CN202264784U (en) * | 2011-08-23 | 2012-06-06 | 上海法维莱交通车辆设备有限公司 | Novel high-speed train air-conditioning system with frequency-variable fans |
| CN202835662U (en) * | 2012-10-10 | 2013-03-27 | 珠海格力电器股份有限公司 | Condensing unit frequency conversion fan starting control device |
-
2012
- 2012-10-10 CN CN201210383148.9A patent/CN103727625B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200986351Y (en) * | 2006-12-13 | 2007-12-05 | 浙江盾安人工环境设备股份有限公司 | Wind cooling cold water air-conditioning unit |
| CN201526483U (en) * | 2009-10-22 | 2010-07-14 | 同济大学 | Variable speed control system for condensate fan |
| CN102466304A (en) * | 2010-11-16 | 2012-05-23 | 力博特公司 | Air-conditioning system and control method of condensation fan thereof |
| CN202264784U (en) * | 2011-08-23 | 2012-06-06 | 上海法维莱交通车辆设备有限公司 | Novel high-speed train air-conditioning system with frequency-variable fans |
| CN202835662U (en) * | 2012-10-10 | 2013-03-27 | 珠海格力电器股份有限公司 | Condensing unit frequency conversion fan starting control device |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105333563A (en) * | 2014-07-29 | 2016-02-17 | 海信（山东）空调有限公司 | Refrigeration control method and device and air conditioner |
| CN105333563B (en) * | 2014-07-29 | 2018-02-16 | 海信（山东）空调有限公司 | A kind of refrigeration control method, device and air conditioner |
| CN104764140B (en) * | 2015-03-19 | 2018-01-09 | 珠海格力电器股份有限公司 | Condensing pressure control method for refrigerating air conditioning unit |
| CN104764140A (en) * | 2015-03-19 | 2015-07-08 | 珠海格力电器股份有限公司 | Condensing pressure control method for refrigerating air conditioning unit |
| CN105276881A (en) * | 2015-10-15 | 2016-01-27 | 珠海格力电器股份有限公司 | condensing unit operation control method |
| CN105864958A (en) * | 2016-03-31 | 2016-08-17 | 宁波奥克斯电气股份有限公司 | Start control method of multi-gear motor in indoor fan of air conditioner |
| CN109458776A (en) * | 2016-10-18 | 2019-03-12 | 珠海格力电器股份有限公司 | Condensing unit operation control method and device and refrigeration equipment with same |
| CN106679066A (en) * | 2016-11-17 | 2017-05-17 | 珠海格力电器股份有限公司 | Unit fault judgment method and device |
| CN106679066B (en) * | 2016-11-17 | 2019-10-25 | 珠海格力电器股份有限公司 | Unit fault judgment method and device |
| CN106949581A (en) * | 2017-02-28 | 2017-07-14 | 深圳市艾特网能技术有限公司 | Frequency-conversion air-conditioning system and its control method |
| CN106949581B (en) * | 2017-02-28 | 2022-06-10 | 深圳市艾特网能技术有限公司 | Variable frequency air conditioning system and control method thereof |
| CN107178880A (en) * | 2017-07-03 | 2017-09-19 | 珠海格力电器股份有限公司 | method and device for controlling air conditioner |
| CN109915990A (en) * | 2019-02-22 | 2019-06-21 | 珠海格力电器股份有限公司 | Method and device for controlling fan and air conditioning system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103727625B (en) | 2016-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103727625A (en) | Starting control method and device for variable-frequency fan of condensing unit | |
| CN107401817B (en) | Variable frequency air conditioner control method and device | |
| CN113357688B (en) | Central range hood system control method and device and central range hood system | |
| US9411343B2 (en) | Temperature feedback control system for dynamic voltage frequency scaling | |
| US11313570B2 (en) | Method and device for controlling electric heating of air conditioner compressor | |
| CN104006486B (en) | Operation control method and device for variable-frequency fan of condensing unit | |
| CN202835662U (en) | Condensing unit frequency conversion fan starting control device | |
| CN103247831B (en) | battery discharge method | |
| CN211503145U (en) | Standby control device and air conditioner | |
| CN108317727A (en) | The antifreeze control method of water heater and its water circuit system, controller and storage medium | |
| CN203116232U (en) | Air conditioner self-starting device | |
| CN108075633A (en) | Soft-start method, device, circuit and the electric appliance of circuit of power factor correction | |
| CN111076370A (en) | Standby control device, air conditioner and standby control method of air conditioner | |
| CN205349679U (en) | Water pump automatic control device | |
| CN104633839A (en) | Method and device for preheating compressor of air conditioning unit | |
| CN106247527B (en) | Method and device for controlling air conditioner at night by using night control mode | |
| CN104048388B (en) | Control method and device and air conditioner | |
| CN105180533A (en) | Screw unit oil return control method and system and screw unit | |
| CN102778849B (en) | Switching on and shutting down control circuit, electronic equipment and on-off control method | |
| CN103727629B (en) | Air-cooled condensing unit starting method and device suitable for low-temperature environment | |
| CN106101406B (en) | Shutdown alarm triggering processing method based on mobile terminal and mobile terminal | |
| CN202132220U (en) | Compressor circuit having protection function and compressor including the same | |
| CN205204853U (en) | Water purification system water production control device and water purification system | |
| US20100058081A1 (en) | Mutual awakening system and method thereof between a handheld device and a wireless communication module | |
| CN107166867B (en) | Image output control method, controller and refrigerator |
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 |