CN202835662U - Condensing unit frequency conversion fan starting control device - Google Patents
Condensing unit frequency conversion fan starting control device Download PDFInfo
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- CN202835662U CN202835662U CN 201220518958 CN201220518958U CN202835662U CN 202835662 U CN202835662 U CN 202835662U CN 201220518958 CN201220518958 CN 201220518958 CN 201220518958 U CN201220518958 U CN 201220518958U CN 202835662 U CN202835662 U CN 202835662U
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- fan
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- blower fan
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 18
- 230000005494 condensation Effects 0.000 claims abstract description 22
- 238000009833 condensation Methods 0.000 claims abstract description 22
- 238000004891 communication Methods 0.000 claims abstract description 9
- 230000000052 comparative effect Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010725 compressor oil Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
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Abstract
The utility model provides a starting control device of a variable frequency fan of a condensing unit, which comprises a pressure sensor arranged at the exhaust port of a compressor, a fan mainboard and a controller electrically connected to the pressure sensor and the fan mainboard; the controller comprises an acquisition module, a calculation module, a judgment module, a storage module and a communication module. The utility model discloses a judgment module has been increased in controlling means, increases the condition that a fan started the lowest frequency promptly for the frequency that condensing pressure corresponds reaches the default and just starts the fan, and the fan can start with the frequency that corresponds under the higher condensing pressure like this, has ensured the high low pressure differential of compressor, is favorable to the safe start of compressor, has guaranteed the normal use of frequency conversion fan forced air cooling condensation unit.
Description
Technical field
The utility model relates to the air-conditioning control field, particularly relates to a kind of condensation unit frequency conversion fan and starts control device.
Background technology
Along with the continuous progress of society and improving constantly of living standard, people's energy-saving and emission-reduction consciousness constantly strengthens, and convertible frequency air-conditioner becomes domestic consumer and commercial user's first-selection gradually.But the frequency conversion fan of existing mainboard starts required frequency startup corresponding to direct basis system high pressure in the convertible frequency air-conditioner.And the condensation unit starting is special, and when environment temperature was very low, starting pressure was lower, and corresponding startup frequency ratio is lower, and frequency conversion fan is difficult to start.
Even and start with lower pressure, because the 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, the lossy compression method machine, can cause condensing pressure (system high pressure, i.e. pressure at expulsion) on the low side when opening condensation fan under low ambient temperature, height pressure reduction will be on the low side, cause the recirculating oil quantity of compressor few, unfavorable to compressor.
The utility model content
Based on this, be necessary the irrationality for the prior art existence, provide a kind of condensation unit frequency conversion fan to start control device.
The technical solution of the utility model is as follows:
A kind of condensation unit frequency conversion fan starts control device, described control device comprises the pressure sensor that is arranged on the exhaust outlet of compressor place, the blower fan mainboard, and being electrically connected to controller on described pressure sensor and the blower fan mainboard, described controller comprises for the acquisition module of the condensing pressure that gathers compressor, is used for calculating the computing module of blower fan frequency and being used for judging whether to open according to the comparative result of blower fan frequency F (n) and preset frequency the judge module of blower fan according to condensing pressure.
Control device in the utility model is carried out following steps:
Step S100: detect the condensing pressure of compressor, obtain condensing pressure P (n);
Step S200: calculate the blower fan frequency according to condensing pressure P (n), obtain blower fan frequency F (n);
Step S300: the comparative result according to blower fan frequency F (n) and preset frequency judges whether to open blower fan.
Among embodiment, described step S300 comprises the steps: therein
S310: judge that blower fan frequency F (n) whether less than preset frequency, if less than preset frequency, then enters step S320; If more than or equal to preset frequency, then enter step S330;
Step S320: air conditioner condensation fan starting control device sends the 0Hz signal to blower fan, and blower fan does not start, and returns step S100;
Step S330: air conditioner condensation fan starting control device sends blower fan frequency F (n) signal, fan starting to blower fan.
Among the step S300, described preset frequency is 30Hz to 40Hz.
Among embodiment, described controller also comprises be used to the memory module of storing predefined preset frequency and time interval T and is used for the aweather communication module of owner's plate transmitted signal, control fan starting switch therein.
Among embodiment, described acquisition module is connected with pressure sensor therein.
Among embodiment, described communication module is connected with the blower fan mainboard of control fan starting therein.
The beneficial effects of the utility model are:
The utility model increases a judge module in controller, namely increase the condition of a fan starting low-limit frequency, so that reaching certain value, frequency corresponding to condensing pressure just start blower fan, blower fan can start with frequency corresponding under the 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.
Description of drawings
Below in conjunction with concrete drawings and the specific embodiments, the utility model is further elaborated.
Fig. 1 is the schematic flow sheet that condensation unit frequency conversion fan of the present utility model starts an embodiment of the performed control method of control device;
Fig. 2 is the schematic diagram that condensation unit frequency conversion fan of the present utility model starts an embodiment of controller.
The specific embodiment
Referring to Fig. 1 and Fig. 2, the utility model provides a kind of condensation unit frequency conversion fan to start control device, described control device comprises the pressure sensor that is arranged on the exhaust outlet of compressor place, the blower fan mainboard, and being electrically connected to controller on described pressure sensor and the 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 used for gathering the condensing pressure of compressor; Described computing module 102 is used for calculating the blower fan frequency according to condensing pressure, and described judge module 103 is used 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 used for storing predefined frequency and time interval T; Described communication module 105 is used for aweather owner's plate transmitted signal, control fan starting switch.
Control device in the present embodiment is carried out following steps:
Step S100: detect the condensing pressure of compressor, obtain condensing pressure P (n); Described step S100 begins to carry out after compressor is opened;
Step S200: calculate the blower fan frequency according to condensing pressure P (n), obtain blower fan frequency F (n);
Step S300: the comparative result according to blower fan frequency F (n) and preset frequency judges whether to open blower fan.
In the present embodiment, among the 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 saturation temperature corresponding to condensing pressure P (n).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)＞f(h), then machine operation frequency f (n)=f (h)
If F (n)＜f(l), then machine operation frequency f (n)=f (l).
Described step S300 comprises the steps:
Step S310: judge that blower fan frequency F (n) whether less than preset frequency, if less than preset frequency, then enters step S320; If more than or equal to preset frequency, then enter step S330;
Step S320: air conditioner condensation fan starting control device sends the 0Hz signal to blower fan, and blower fan does not start, and returns step S100;
Step S330: air conditioner condensation fan starting control device sends blower fan frequency F (n) signal, fan starting to blower fan.
Preset in the present embodiment when the blower fan frequency is lower than preset frequency, air conditioning control device sends the 0Hz signal to blower fan, and then blower fan does not start, and sets like this and has avoided blower fan can't start situation about breaking down when frequency is low.
Present embodiment provides a kind of entry condition of condensation fan, setting blower fan frequency blower fan more than or equal to preset frequency the time just starts, blower fan can't start situation about breaking down in the time of can avoiding like this frequency low, ensured simultaneously the height pressure reduction of compressor, be conducive to the clean boot of compressor, guarantee the normal use of frequency conversion fan air-cooled condensing group, prolonged the service life of compressor.
Better, as a kind of embodiment, among the step S300, described preset frequency is 30Hz to 40Hz.In the present embodiment, preset frequency being set as 30Hz to 40Hz, is because this frequency is the optimum frequency of fan starting.
Better, as a kind of embodiment, among the described step S100, every interval T time, the condensing pressure of detection first compression machine.In order better to control the start-up time of blower fan, present embodiment is set every interval certain hour, needs 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.
Better, as a kind of embodiment, described acquisition module 101 is connected with the pressure sensor of the exhaust ports of compressor.Present embodiment arranges the condensing pressure that pressure sensor detects compressor in the exhaust ports of compressor.More excellent, a plurality of pressure sensors can be set get its mean value as implementing condensing pressure value, more accurate like this.
Better, as a kind of embodiment, described communication module 105 is connected with the blower fan mainboard of control fan starting.Described communication module is used for aweather, and owner's plate sends 0Hz or blower fan frequency signal.
In embodiments of the present invention, described controller is mainly controlled by DSP microprocessor (Digital SignalProcessing, DSP) integrated circuit.Preferably, be integrated with " DSP " chip at described integrated circuit (controller), also be integrated with and satisfy on the described integrated circuit embodiment of the invention modules function interlock circuit, device (such as: the devices such as memory, input and output (I/O)), referring to Fig. 2, Fig. 2 has illustrated the structure of DSP microprocessor on the controller.Judgement when described controller is mainly used in starting and control are processed.
Those skilled in the art are to be understood that, the developer can utilize assembler language or C language to carry out the DSP functional development, or by related software (for example: MATLAB6.5 version (Release13)) realize the setting of configuration parameter (for example: default time cycle or default time threshold) and realize starting the automatic processing operation of control by performing a programme.The developer burns program after the dsp chip, and interlock circuit and DSP are integrated into the complete control circuit of realization on the controller.
Further, the controller that condensation unit frequency conversion fan startup control device adopts in the embodiment of the invention can be selected dsp chip, also can use the control of micro-control unit (Micro Control Unit, MCU) integrated circuit.Preferably, be integrated with " AT89C51 " single-chip microcomputer on the described integrated circuit, the embodiment of the invention is not limited to the use said chip, belongs to the common practise that those skilled in the art can understand about the selection of said chip, and the embodiment of the invention repeats no more this.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (4)
1. a condensation unit frequency conversion fan starts control device, it is characterized in that:
Described control device comprises the pressure sensor that is arranged on the exhaust outlet of compressor place, the blower fan mainboard, and be electrically connected to controller on described pressure sensor and the blower fan mainboard;
Described controller comprises the acquisition module for the condensing pressure that gathers compressor;
Be used for calculating according to condensing pressure the computing module of blower fan frequency;
For the judge module that judges 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 device, it is characterized in that:
Described controller also comprises,
Store the memory module of predefined preset frequency and time interval T and the communication module of owner's plate transmitted signal, control fan starting switch aweather.
3. condensation unit frequency conversion fan according to claim 1 starts control device, it is characterized in that:
Described acquisition module is connected with pressure sensor.
4. condensation unit frequency conversion fan according to claim 2 starts control device, it is characterized in that:
Described communication module is connected with the blower fan mainboard of control fan starting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220518958 CN202835662U (en) | 2012-10-10 | 2012-10-10 | Condensing unit frequency conversion fan starting control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220518958 CN202835662U (en) | 2012-10-10 | 2012-10-10 | Condensing unit frequency conversion fan starting control device |
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| Publication Number | Publication Date |
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| CN202835662U true CN202835662U (en) | 2013-03-27 |
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| CN 201220518958 Expired - Lifetime CN202835662U (en) | 2012-10-10 | 2012-10-10 | Condensing unit frequency conversion fan starting control device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727625A (en) * | 2012-10-10 | 2014-04-16 | 珠海格力电器股份有限公司 | Starting control method and device for variable-frequency fan of condensing 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 |
| CN104896626A (en) * | 2014-03-07 | 2015-09-09 | 珠海格力电器股份有限公司 | Refrigeration control method and device for air-cooled water chilling unit and unit system |
| 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 |
| CN112393482A (en) * | 2020-11-20 | 2021-02-23 | 珠海格力电器股份有限公司 | Variable-frequency air-cooled water chilling unit and variable-working-condition starting control method thereof |
-
2012
- 2012-10-10 CN CN 201220518958 patent/CN202835662U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727625A (en) * | 2012-10-10 | 2014-04-16 | 珠海格力电器股份有限公司 | Starting control method and device for variable-frequency fan of condensing unit |
| CN104896626A (en) * | 2014-03-07 | 2015-09-09 | 珠海格力电器股份有限公司 | Refrigeration control method and device for air-cooled water chilling unit and unit system |
| 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 |
| 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 |
| 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 |
| CN112393482A (en) * | 2020-11-20 | 2021-02-23 | 珠海格力电器股份有限公司 | Variable-frequency air-cooled water chilling unit and variable-working-condition starting control method thereof |
| CN112393482B (en) * | 2020-11-20 | 2023-03-24 | 珠海格力电器股份有限公司 | Variable-frequency air-cooled water chilling unit and variable-working-condition starting control method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130327 |