CN101666535B - Low-temperature refrigeration control device of single-phase motor in air conditioning unit - Google Patents
Low-temperature refrigeration control device of single-phase motor in air conditioning unit Download PDFInfo
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- CN101666535B CN101666535B CN200910192153XA CN200910192153A CN101666535B CN 101666535 B CN101666535 B CN 101666535B CN 200910192153X A CN200910192153X A CN 200910192153XA CN 200910192153 A CN200910192153 A CN 200910192153A CN 101666535 B CN101666535 B CN 101666535B
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Abstract
The invention discloses a low-temperature refrigeration control device of a single-phase motor in an air conditioning unit, which comprises a motor control module, a first pressure switch and a second pressure switch, wherein the closed pressure valve value of the first pressure switch is higher than that of the second pressure switch; an N-wire interface of the motor control module is connected with zero line and the zero line interface of the motor driving an outdoor blower; an L-wire interface is connected with a fire line; an HF interface and an LF interface are respectively connected with a high speed/low speed running control port of the motor; a PS1 interface and a PS2 interface are respectively connected with one ends of the first pressure switch and the second pressure switch, and the other ends of the first pressure switch and the second pressure switch are connected in parallel and connected with the COM interface of the motor control module; and the low-temperature refrigeration control device controls the rotating speed of the motor by collecting the air pressure value at the outlet of a condenser, and leads the pressure of condenser to fluctuate in a normal range, thus avoiding dangerous conditions of incomplete evaporation of the system, frosting or even frost cracking of an evaporator and the like caused by over-low condensing pressure due to low temperature, and improving the running conditions of low-temperature refrigeration of the air conditioning unit.
Description
Technical field:
The present invention relates to the control device technical field of air-conditioning unit motor, particularly the low-temperature refrigeration control device of single-phase motor in air conditioning unit.
Background technology:
Existing air-conditioner includes refrigerating circuit and electric control system, and refrigerating circuit is made up of compressor, condenser, capillary member and evaporimeter.Electric-control system comprises parts such as circuit control panel, thermistor, control valve and fan electromotor.During refrigerating operaton, air-conditioner is according to refrigeration principle, by compressor work with heat from indoor transfer to outdoor.Generally speaking, during refrigerating operaton, indoor temperature can be higher than outdoor temperature, and refrigerating plant is along with outdoor temperature descends and the increase of condensation ability.
Existing family expenses detachable air conditioner, the environment temperature of work are generally 16 ℃-43 ℃, in actual use, in general, when outdoor environment temperature is high, require air-conditioner to carry out the refrigerating operaton pattern; When outdoor environment temperature is low, require air-conditioner to carry out the heating operation pattern.Our domestic air conditioning all is to design at such instructions for use at present.But the occasion that some is special when outdoor environment temperature is lower than 0 ℃, still requires refrigeration.Such as large-scale machine room, equipment etc., it had both required indoor and outdoor isolation, require indoor environment temperature to remain on 18-32 ℃ again, because in the time of the operation of indoor machine and equipment, the capital constantly generates heat, indoor temperature can constantly rise, and then has influenced the life-span and the work efficiency of workers of equipment, and this just requires air-conditioner must carry out the refrigerating operaton pattern.For traditional domestic air conditioner, when being lower than 0 ℃, outdoor environment temperature carries out refrigerating operaton, because the outdoor air temperature is very low, make the outside condensation temperature very low, the refrigerant temperature of condensator outlet can reach below 10 ℃, this moment, the condensing pressure fluctuation was big, cause condensing pressure low, then cold-producing medium is through after the capillary member, and its evaporating temperature often is lower than-5 ℃, passes through capillary-compensated again, cold-producing medium enters indoor evaporator, cause frosting easily, freeze, influence the air circulation of indoor, influence refrigeration.Generally speaking, the rotating speed of air-conditioning unit blower fan is the key factor that influences condensing pressure.
Summary of the invention:
The objective of the invention is to provide a kind of condensing pressure when regulating air-conditioning unit blower motor rotating speed and control cryogenic refrigeration, thereby improve the low-temperature refrigeration control device of the single-phase motor in air conditioning unit of air-conditioning unit cryogenic refrigeration operation conditions at the deficiencies in the prior art.
Purpose of the present invention realizes by following technical measures:
The low-temperature refrigeration control device of single-phase motor in air conditioning unit, it comprises the motor control module that is electrically connected with air-conditioning unit control module, and first pressure switch and second pressure switch that are arranged on condensator outlet; The clossing pressure threshold values of described first pressure switch is higher than the clossing pressure threshold values of second pressure switch; Described motor control module comprises the N line interface, the L line interface, the HF interface, the LF interface, the PS1 interface, PS2 interface and com interface, described N line interface is connected with the zero line of air-conditioning unit control module and is connected with the zero line interface of the motor that drives outdoor fan, described L line interface is connected with the live wire of air-conditioning unit control module, described HF interface is connected with the control port that runs up of described motor, described LF interface is connected with the low-speed running control port of described motor, described PS1 interface is connected with an end of first pressure switch, described PS2 interface is connected with an end of second pressure switch, and described first pressure switch is connected with the other end parallel connection of second pressure switch and with described com interface.
When first pressure switch and second pressure switch all disconnected, described motor control module sent the motor control signal that runs up by the HF interface; When the first pressure switch closure, and second pressure switch is when disconnecting, and motor control module sends motor low-speed running control signal by the LF interface; All closed when first pressure switch and second pressure switch, the HF interface of motor control module and LF interface all do not send control signal, then motor stall.
Further, described motor control module is provided with the OF interface, and described OF interface is connected with the control port that control air-conditioning unit opens and closes.
Further, described motor control module includes the 4WV interface, and described 4WV interface is connected with the cross valve control port of control air-conditioning unit refrigerating/heating pattern conversion.
According to above-described, described motor control module respectively with two motor parallels that drive outdoor fan.
Wherein, described motor is the condenser type monophase machine, and the N line interface of described motor control module is connected with the fire-wire interfaces of described motor by an electric capacity.
Beneficial effect of the present invention is: adopt the present invention, when the air-conditioning unit carries out cryogenic refrigeration, if the air pressure of condensator outlet is higher than the clossing pressure threshold values of first pressure switch, first pressure switch and second pressure switch all disconnect, the HF interface of motor control module is communicated with motor, and the driven by motor blower fan runs up; If described air pressure is higher than the closed threshold values of second pressure switch and is lower than the clossing pressure threshold values of first pressure switch, then the LF interface of motor control module is communicated with motor, driven by motor blower fan low-speed running; If described air pressure is lower than the closed threshold values of second pressure switch, then first pressure switch and second pressure switch are all closed, and the HF interface of motor control module and LF interface all do not send control signal, then motor stall; The present invention controls motor speed by the atmospheric pressure value of gathering condensator outlet, condenser pressure is fluctuateed in a normal range (NR), thereby avoid because of low temperature cause the low excessively system's evaporation that brings of condensing pressure not exclusively, dangerous situations such as evaporimeter frosting even bursting by freezing, improve air-conditioning unit cryogenic refrigeration operation conditions.
Description of drawings:
The invention will be further described to utilize accompanying drawing, but the embodiment in the accompanying drawing does not constitute any limitation of the invention.
Fig. 1 is the circuit theory diagrams of the low-temperature refrigeration control device of a kind of single-phase motor in air conditioning unit of the present invention;
Fig. 2 is the low-temperature refrigeration control device of a kind of single-phase motor in air conditioning unit of the present invention and the circuit theory diagrams of two motor parallels;
Fig. 3 is the logical flow chart of motor control module of the present invention.
Comprise among Fig. 1, Fig. 2, Fig. 3:
1---air-conditioning unit control module; 2---motor control module; 3---motor; 4---first pressure switch; 5---second pressure switch; 6---electric capacity.
Tool is stopped embodiment:
The present invention is further illustrated below in conjunction with accompanying drawing, see shown in Figure 1, the low-temperature refrigeration control device of single-phase motor in air conditioning unit, it comprises the motor control module 2 that is electrically connected with air-conditioning unit control module 1, and first pressure switch 4 and second pressure switch 5 that are arranged on condensator outlet; The clossing pressure threshold values of described first pressure switch 4 is higher than the clossing pressure threshold values of second pressure switch 5; Described motor control module 2 comprises N line interface, L line interface, HF interface, LF interface, PS1 interface, PS2 interface and com interface; The N line interface of described motor control module 2 is connected with the zero line of air-conditioning unit control module 1 and is connected with the zero line interface of the motor 3 that drives outdoor fan, the L line interface of described motor control module 2 is connected with the live wire of air-conditioning unit control module 1, the HF interface of described motor control module 2 is connected described motor control module with the control port that runs up of described motor 3
2 LF interface is connected with the low-speed running control port of described motor 3, the PS1 interface of described motor control module 2 is connected with an end of described first pressure switch 4, described PS2 interface is connected with an end of second pressure switch 5, and described first pressure switch 4 is connected with the other end parallel connection of second pressure switch 5 and with the com interface of described motor control module 2.
Wherein, described motor 3 is a condenser type individual event alternating current generator, drive by civil power, can be the condenser type individual event alternating current generator of capacitor start formula individual event alternating current generator, capacitor operating type individual event alternating current generator or other type, as long as reach the purpose that possesses the adjustable stage motor speed, described condenser type individual event alternating current generator 3 is not given unnecessary details its operation principle and structure here for originally being widely used in the prior art of air-conditioning unit.
See shown in Figure 3, when the air-conditioning unit carried out cryogenic refrigeration, if the air pressure of condensator outlet is higher than the clossing pressure threshold values of first pressure switch 4, first pressure switch 4 and second pressure switch 5 all disconnected, the HF interface of motor control module 2 is communicated with motor 3, and motor 3 drives blower fan and runs up; If described air pressure is higher than the closed threshold values of second pressure switch 5 and is lower than the clossing pressure threshold values of first pressure switch 4, then the LF interface of motor control module 2 is communicated with motor 3, and motor 3 drives the blower fan low-speed running; If described air pressure is lower than the closed threshold values of second pressure switch 5, then first pressure switch 4 and second pressure switch 5 are all closed, and the HF interface of motor control module 2 and LF interface all do not send control signal, then motor 3 stalls; The present invention controls motor 3 rotating speeds by the atmospheric pressure value of gathering condensator outlet, condenser pressure is fluctuateed in a normal range (NR), thereby avoid because of low temperature cause the low excessively system's evaporation that brings of condensing pressure not exclusively, dangerous situations such as evaporimeter frosting even bursting by freezing, improve air-conditioning unit cryogenic refrigeration operation conditions.
According to above-described, the PS1 interface of described motor control module 2 and PS2 interface are that the make-and-break signal of first pressure switch 4 and second pressure switch 5 is gathered port, that is are that the condensator outlet pressure data is gathered port; The HF interface of described motor control module 2 and LF interface produce port for the motor speed control signal; So, if shown in motor 3 be the motor of multistage adjustable speed, also can be by a plurality of pressure switches be set at condensator outlet, and the pin that is connected with each rotating speed control port of motor 3 is set and realizes the multistage rotating speed of motor 3 is regulated at described motor control module 2.
See shown in Figure 1ly, the described motor control module 2 of present embodiment also is provided with the OF interface, and described OF interface is connected with the control port OF that control air-conditioning unit opens and closes.Like this, when described control port OF switches on, described motor 3 ability rotation works, when not switching on as if described control port OF, the air-conditioning unit is closed, and described motor 3 also cuts out.
Wherein, described motor control module 2 also is provided with the 4WV interface, and described 4WV interface is connected with the cross valve control port 4WV of control air-conditioning unit refrigerating/heating pattern conversion.Like this, when described air-conditioning unit was in heating mode, described cross valve control port 4WV conducted, and the HF interface of described motor control module 2 produces the signal of telecommunication, and control motor 3 runs up; When described air-conditioning unit was in refrigeration mode, described cross valve control port 4WV did not switch on, and the rotating speed of described motor 3 is run up or low-speed running by the control signal control that described HF interface or LF interface produce.
See shown in Figure 2ly, described motor control module 2 also can be respectively and two motor parallels that drive outdoor fan.Specifically, the N line interface of described motor control module 2 is connected and is connected with the zero line interface of two motors respectively with the zero line of air-conditioning unit control module 1, the L line interface of described motor control module 2 is connected with air-conditioning unit control module 1 live wire, the HF interface of described motor control module 2 is connected with the control port that runs up of two motors 3 respectively, and the LF interface of described motor control module 2 is connected with the low-speed running control port of two motors 3 respectively
Wherein, described motor 3 is a condenser type monophase machine 3, and the N line interface of described motor control module 2 is connected with the fire-wire interfaces of described motor 3 by an electric capacity 6.
Should be noted that at last; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although the present invention has been done to explain with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the essence and the scope of technical solution of the present invention.
Claims (5)
1. the low-temperature refrigeration control device of single-phase motor in air conditioning unit, it is characterized in that: it comprises the motor control module that is electrically connected with air-conditioning unit control module, and first pressure switch and second pressure switch that are arranged on condensator outlet;
The clossing pressure threshold values of described first pressure switch is higher than the clossing pressure threshold values of second pressure switch;
Described motor control module comprises the N line interface, the L line interface, the HF interface, the LF interface, the PS1 interface, PS2 interface and com interface, described N line interface is connected with the zero line of air-conditioning unit control module and is connected with the zero line interface of the motor that drives outdoor fan, described L line interface is connected with the live wire of air-conditioning unit control module, described HF interface is connected with the control port that runs up of described motor, described LF interface is connected with the low-speed running control port of described motor, described PS1 interface is connected with an end of first pressure switch, described PS2 interface is connected with an end of second pressure switch, and described first pressure switch is connected with the other end parallel connection of second pressure switch and with described com interface;
When first pressure switch and second pressure switch all disconnected, described motor control module sent the motor control signal that runs up by the HF interface; When the first pressure switch closure, and second pressure switch is when disconnecting, and motor control module sends motor low-speed running control signal by the LF interface; All closed when first pressure switch and second pressure switch, the HF interface of motor control module and LF interface all do not send control signal, then motor stall.
2. the low-temperature refrigeration control device of single-phase motor in air conditioning unit according to claim 1, it is characterized in that: described motor control module is provided with the OF interface, and described OF interface is connected with the control port that control air-conditioning unit opens and closes.
3. the low-temperature refrigeration control device of single-phase motor in air conditioning unit according to claim 2, it is characterized in that: described motor control module includes the 4WV interface, and described 4WV interface is connected with the cross valve control port of control air-conditioning unit refrigerating/heating pattern conversion.
4. according to the low-temperature refrigeration control device of any described single-phase motor in air conditioning unit of claim 1～3, it is characterized in that: described motor control module respectively with two motor parallels that drive outdoor fan.
5. the low-temperature refrigeration control device of single-phase motor in air conditioning unit according to claim 4, it is characterized in that: described motor is the condenser type monophase machine, the N line interface of described motor control module is connected with the fire-wire interfaces of described motor by an electric capacity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910192153XA CN101666535B (en) | 2009-09-09 | 2009-09-09 | Low-temperature refrigeration control device of single-phase motor in air conditioning unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910192153XA CN101666535B (en) | 2009-09-09 | 2009-09-09 | Low-temperature refrigeration control device of single-phase motor in air conditioning unit |
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| CN101666535A CN101666535A (en) | 2010-03-10 |
| CN101666535B true CN101666535B (en) | 2011-06-15 |
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| CN200910192153XA Active CN101666535B (en) | 2009-09-09 | 2009-09-09 | Low-temperature refrigeration control device of single-phase motor in air conditioning unit |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103353150B (en) * | 2013-07-10 | 2016-07-20 | 广东欧科空调制冷有限公司 | Air-cooled heat-pump air-conditioner group with cryogenic refrigeration |
| CN105698332A (en) * | 2014-11-24 | 2016-06-22 | 深圳市共济科技有限公司 | Multi-stage automatic fan speed regulation device and speed regulation method |
| CN110360712B (en) * | 2018-04-09 | 2020-05-26 | 珠海格力电器股份有限公司 | Air conditioner control method and device, storage medium and air conditioner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2256515Y (en) * | 1996-03-06 | 1997-06-18 | 武汉港龙实业有限公司空调设备分公司 | Furry controller for fan-coil air conditioner |
| JP2001016895A (en) * | 1999-06-24 | 2001-01-19 | Hitachi Ltd | Switching controller of single-phase motor |
| JP2004225940A (en) * | 2003-01-20 | 2004-08-12 | Masahiro Kanemori | Operation switch part of air conditioning system |
-
2009
- 2009-09-09 CN CN200910192153XA patent/CN101666535B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2256515Y (en) * | 1996-03-06 | 1997-06-18 | 武汉港龙实业有限公司空调设备分公司 | Furry controller for fan-coil air conditioner |
| JP2001016895A (en) * | 1999-06-24 | 2001-01-19 | Hitachi Ltd | Switching controller of single-phase motor |
| JP2004225940A (en) * | 2003-01-20 | 2004-08-12 | Masahiro Kanemori | Operation switch part of air conditioning system |
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| CN101666535A (en) | 2010-03-10 |
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