CN102506467A - Low-temperature air-conditioning system - Google Patents
Low-temperature air-conditioning system Download PDFInfo
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- CN102506467A CN102506467A CN2011103463459A CN201110346345A CN102506467A CN 102506467 A CN102506467 A CN 102506467A CN 2011103463459 A CN2011103463459 A CN 2011103463459A CN 201110346345 A CN201110346345 A CN 201110346345A CN 102506467 A CN102506467 A CN 102506467A
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Abstract
The invention provides a low-temperature air-conditioning system, which comprises an indoor unit and outdoor unit. The outdoor unit comprises a first heat exchanger, a fan, a motor driving the fan to rotate, a driving control circuit for driving and controlling the motor to rotate, and a temperature sensor and/or a pressure sensor used for detecting pressure and/or temperature of a refrigerant output by the first heat exchanger in the outdoor unit, wherein the driving control circuit adjusts a rotating speed of the motor according to the measured temperature value or pressure value; and therefore, a refrigeration mode of a common air-conditioning system can be realized in a low-temperature environment.
Description
[technical field]
The present invention relates to field of air conditioning, particularly about a kind of low-temperature air conditioner system.
[background technology]
Domestic air conditioning has got into huge numbers of families at present, has brought the slight chill in the air of silk silk in hot summer to people, has greatly improved people's adventure in daily life.In general, air-conditioning only need at high temperature freeze, and heats at low temperatures.In some is used, even under low temperature environment, still need air-conditioning be provided with promising refrigeration mode, such as the very low temperature of the indoor maintenance always of needs.Yet; Common air-conditioning then can not satisfy this requirement, if under low temperature environment, is that 0 degree is below zero such as outdoor temperature; Still need air-conditioning system be set to refrigeration; This moment, air-conditioning system was very fast owing to outdoor heat exchanger dispels the heat, and possibly cause pressure not enough, the air-conditioning system cisco unity malfunction.
Therefore, hope to propose a kind of improved air-conditioning system that can overcome the problems referred to above.
[summary of the invention]
The object of the present invention is to provide a kind of low-temperature air conditioner system, it can still can freeze under low temperature environment.
For reaching aforementioned purpose, a kind of low-temperature air conditioner of the present invention system, it comprises indoor set and off-premises station.Said off-premises station comprises the Drive and Control Circuit that the said motor of motor, driving and control of first heat exchanger, blower fan, the said blower fan rotation of drive rotates and the pressure of the cold-producing medium that is used for surveying first heat exchanger output in the off-premises station and/or the temperature sensor and/or the pressure sensor of temperature, the rotating speed that temperature value that said Drive and Control Circuit basis records or force value are adjusted said motor.
Further; If the force value that the temperature value that temperature sensor records records less than first predetermined temperature value and/or pressure sensor is during less than first scheduled pressure value; Said Drive and Control Circuit then reduces the rotating speed of said motor; If the force value that the temperature value that temperature sensor records records more than or equal to first predetermined temperature value and/or pressure sensor is during more than or equal to first scheduled pressure value, said Drive and Control Circuit then keeps the rotating speed of said motor constant.
Further, said Drive and Control Circuit is adjusted the rotating speed of said motor through the input voltage that changes said motor.
Further, said Drive and Control Circuit is adjusted the rotating speed of said motor through the electric voltage frequency that changes said motor.
Further again; Said Drive and Control Circuit comprises pulse-width modulation circuit and power-switching circuit; Said pulse-width modulation circuit is used for the pulse-width signal of confirming suitable duty ratio according to the temperature value of measuring or force value; Said power-switching circuit converts an input voltage to an output voltage according to said pulse-width signal, and this output voltage will be as the input voltage of said motor.
Further again, during less than second predetermined temperature value and/or in the force value of measuring during less than second scheduled pressure value, said Drive and Control Circuit is closed said motor at the temperature value of measuring.
Further again; At the temperature value of measuring during greater than the 3rd predetermined temperature value and/or in the force value of measuring during less than the 3rd scheduled pressure value; Said Drive and Control Circuit is opened said motor; Wherein the 3rd predetermined temperature value less than first predetermined temperature value greater than second predetermined temperature value, the 3rd scheduled pressure value less than first scheduled pressure value greater than second scheduled pressure value.
Further again, said indoor set comprises second heat exchanger, and said off-premises station also comprises compressor, throttle mechanism and four-way change-over valve; When said air-conditioning system operates in refrigeration mode,, get into first heat exchanger behind the process four-way change-over valve by the high-temperature high-pressure refrigerant gas that compressor is discharged; Cold-producing medium and outdoor air carry out being condensed into high-temperature high-pressure refrigerant liquid after the heat exchange in first heat exchanger; Cold-producing medium is through throttle mechanism throttling step-down afterwards, and the gas-liquid two-phase state that becomes low temperature, low pressure gets into second heat exchanger, and cold-producing medium and room air carry out flashing to low-temperature low-pressure refrigerant gas after the heat exchange in second heat exchanger; Cold-producing medium gets into the air entry of compressor through four-way change-over valve afterwards; In compressor, compress, become the gas of HTHP, formed a complete kind of refrigeration cycle thus.
Compared with prior art; Temperature sensor and/or pressure sensor are set in the air-conditioning system of the present invention; Be used for surveying the pressure and/or the temperature of the cold-producing medium of the heat exchanger output in the off-premises station; If force value that records and/or temperature value are less than scheduled pressure value and/or temperature value; To adjust the rotating speed of the blower fan of off-premises station according to force value that records and/or temperature value so, thereby change the heat exchange situation of the heat exchanger of off-premises station, and then the pressure and/or the temperature of the cold-producing medium of the heat exchanger output in the adjustment off-premises station.
[description of drawings]
Fig. 1 is that air-conditioning system in one embodiment of the present of invention is at the structural principle sketch map of refrigeration mode; With
Fig. 2 is the structural principle sketch map of the off-premises station of the air-conditioning system in one embodiment of the present of invention.
Fig. 3 is the Drive and Control Circuit block diagram in one embodiment among the present invention.
[specific embodiment]
For make above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, below in conjunction with accompanying drawing and the specific embodiment the present invention done further detailed explanation.
Alleged here " embodiment " or " embodiment " are meant special characteristic, structure or the characteristic that can be contained at least one implementation of the present invention.Different in this manual local " in one embodiment " that occur not are all to refer to same embodiment, neither be independent or optionally mutually exclusive with other embodiment embodiment.
Fig. 1 is that air-conditioning system in one embodiment of the present of invention is at the structural principle sketch map of refrigeration mode.As shown in the figure, said air-conditioning system comprises compressor 1, four-way change-over valve 2, the first heat exchangers 4, and throttle mechanism 5, the second heat exchangers 7 are with the pipeline 3,9 and 10 of each member connection.
When said air-conditioning system operates in refrigeration mode; High-temperature high-pressure refrigerant gas by compressor 1 discharge; Get into first heat exchanger 4 through four-way change-over valve 2 and pipeline 3 backs, be condensed into high-temperature high-pressure refrigerant liquid after cold-producing medium and outdoor air carry out heat exchange in first heat exchanger 4, this moment, first heat exchanger 4 was as condenser; Cold-producing medium is through throttle mechanism 5 throttling step-downs afterwards, and the gas-liquid two-phase state that becomes low temperature, low pressure gets into second heat exchanger 7.Flash to low-temperature low-pressure refrigerant gas after cold-producing medium and room air carry out heat exchange in second heat exchanger 7; This moment, second heat exchanger 7 was as evaporimeter; Cold-producing medium gets into the air entry of compressor 1 through pipeline 9, four-way change-over valve 2 and pipeline 10 afterwards; In compressor 1, compress, become the gas of HTHP.Thus, formed a complete kind of refrigeration cycle.
Said air-conditioning system has generally comprised indoor set and off-premises station, and wherein said indoor set generally comprises second heat exchanger 7, and said off-premises station generally comprises first heat exchanger 4, compressor 1, throttle mechanism 5 and four-way change-over valve 2.As shown in Figure 2, said off-premises station also includes blower fan 12, drive motor 13 that said blower fan 12 rotates, drive and control the Drive and Control Circuit 14 that said motor 13 rotates and the pressure of the cold-producing medium that is used for surveying heat exchanger 4 outputs in the off-premises station and/or the temperature sensor 15 and/or the pressure sensor 16 of temperature.
If the force value that the temperature value that temperature sensor 15 records records less than predetermined temperature value and/or pressure sensor 16 is during less than scheduled pressure value; The low excessively normal refrigeration that has had influence on air-conditioning system of outdoor temperature then is described; 14 rotating speeds that reduce said motor 13 of said Drive and Control Circuit are to change the heat exchange situation of said heat exchanger 4.If the force value that the temperature value that temperature sensor 15 records records more than or equal to predetermined temperature value and/or pressure sensor 16 is during more than or equal to scheduled pressure value; Can normally freezing of air-conditioning system then, 14 of said Drive and Control Circuit keep the rotating speed of said motor 13 constant.
Common, the pressure of the output of said heat exchanger 4 and temperature are proportional, that is to say, if record temperature wherein, so just can calculate pressure wherein through both proportionate relationships, vice versa.Therefore, in use, generally select for use one in temperature sensor 15 and the pressure sensor 16 to survey.
In one embodiment, said Drive and Control Circuit 14 is adjusted the rotating speed of said motor 13 through the input voltage that changes said motor 13.
In an instantiation, said Drive and Control Circuit 14 can obtain the input voltage of said motor 13 according to measuring temperature with reference to table one, thereby changes the rotating speed of said motor 13.Visible according to table one; When temperature is spent (second predetermined temperature value) smaller or equal to 8, turn-off said motor 13,, when temperature is spent (the 3rd predetermined temperature value) greater than 10, open said motor 13 to protect said motor; With the startup that prevents said motor frequency with close; When temperature was spent (first predetermined temperature value) more than or equal to 27, said input voltage remained unchanged, and this moment, the rotating speed of said motor 13 kept constant.
Table one, the temperature input voltage table of comparisons
| Temperature (degree) | Input voltage (V) |
| 0 | ? |
| 1 | ? |
| 2 | ? |
| 3 | ? |
| 4 | ? |
| 5 | ? |
| 6 | ? |
| 7 | ? |
| 8 | 0 (shutdown) |
| 9 | 108 |
| 10 | 108 (starts) |
| 11 | 118 |
| 12 | 127 |
| 13 | 135 |
| 14 | 141 |
| 15 | 147 |
| 16 | 154 |
| 17 | 160 |
| 18 | 167 |
| 19 | 172 |
| 20 | 176 |
| 21 | 180 |
| 22 | 185 |
| 23 | 189 |
[0027]?
| 24 | 192 |
| 25 | 195 |
| 26 | 200 |
| 27 | 220 |
| 28 | ? |
| 29 | ? |
| 30 | ? |
In another instantiation, said Drive and Control Circuit 14 can obtain the input voltage of said motor 13 according to measuring pressure with reference to table two, thereby changes the rotating speed of said motor 13.Visible according to table two; Turn-off said motor 13 during smaller or equal to 205PSIG (second scheduled pressure value) at pressure, protecting said motor, open said motor 13 during greater than 210PSIG (the 3rd scheduled pressure value) at pressure; To prevent at frequent starting and to close; During more than or equal to 275PSIG (first scheduled pressure value), said input voltage remains unchanged at pressure, and this moment, the rotating speed of said motor 13 kept constant.
Table one, the pressure input voltage table of comparisons
In one embodiment, said Drive and Control Circuit 14 is adjusted the rotating speed of said motor 13 through the electric voltage frequency that changes said motor 13.
Fig. 3 shows said Drive and Control Circuit 14 block diagram in one embodiment.As shown in Figure 3; Said Drive and Control Circuit 14 comprises PWM (Pulse Width Modulation) circuit 141 and power-switching circuit 142; Said pwm circuit 141 is used for the pulse-width signal PWM that confirms suitable duty ratio according to the temperature value of measuring or force value; Said power-switching circuit 142 converts an input voltage to an output voltage according to said pulse-width signal PWM, and this output voltage will be as the input voltage of said motor 13.
Among this paper and/or the expression " with " perhaps " or ".
Above-mentioned explanation has fully disclosed the specific embodiment of the present invention.It is pointed out that any change that technical staff's specific embodiments of the invention of being familiar with this field is done does not all break away from the scope of claims of the present invention.Correspondingly, the scope of claim of the present invention also is not limited only to previous embodiment.
Claims (8)
1. low-temperature air conditioner system; It comprises indoor set and off-premises station; It is characterized in that: said off-premises station comprises the Drive and Control Circuit that the said motor of motor, driving and control of first heat exchanger, blower fan, the said blower fan rotation of drive rotates and the pressure of the cold-producing medium that is used for surveying first heat exchanger output in the off-premises station and/or the temperature sensor and/or the pressure sensor of temperature, the rotating speed that temperature value that said Drive and Control Circuit basis records or force value are adjusted said motor.
2. low-temperature air conditioner as claimed in claim 1 system; It is characterized in that: if the force value that the temperature value that temperature sensor records records less than first predetermined temperature value and/or pressure sensor is during less than first scheduled pressure value; Said Drive and Control Circuit then reduces the rotating speed of said motor; If the force value that the temperature value that temperature sensor records records more than or equal to first predetermined temperature value and/or pressure sensor is during more than or equal to first scheduled pressure value, said Drive and Control Circuit then keeps the rotating speed of said motor constant.
3. low-temperature air conditioner as claimed in claim 2 system, it is characterized in that: said Drive and Control Circuit is adjusted the rotating speed of said motor through the input voltage that changes said motor.
4. low-temperature air conditioner as claimed in claim 2 system, it is characterized in that: said Drive and Control Circuit is adjusted the rotating speed of said motor through the electric voltage frequency that changes said motor.
5. low-temperature air conditioner as claimed in claim 3 system; It is characterized in that: said Drive and Control Circuit comprises pulse-width modulation circuit and power-switching circuit; Said pulse-width modulation circuit is used for the pulse-width signal of confirming suitable duty ratio according to the temperature value of measuring or force value; Said power-switching circuit converts an input voltage to an output voltage according to said pulse-width signal, and this output voltage will be as the input voltage of said motor.
6. low-temperature air conditioner as claimed in claim 3 system is characterized in that: during less than second predetermined temperature value and/or in the force value of measuring during less than second scheduled pressure value, said Drive and Control Circuit is closed said motor at the temperature value of measuring.
7. low-temperature air conditioner as claimed in claim 6 system; It is characterized in that: at the temperature value of measuring during greater than the 3rd predetermined temperature value and/or in the force value of measuring during less than the 3rd scheduled pressure value; Said Drive and Control Circuit is opened said motor; Wherein the 3rd predetermined temperature value less than first predetermined temperature value greater than second predetermined temperature value, the 3rd scheduled pressure value less than first scheduled pressure value greater than second scheduled pressure value.
8. low-temperature air conditioner as claimed in claim 1 system, it is characterized in that: said indoor set comprises second heat exchanger, said off-premises station also comprises compressor, throttle mechanism and four-way change-over valve,
When said air-conditioning system operates in refrigeration mode; High-temperature high-pressure refrigerant gas by the compressor discharge; Through getting into first heat exchanger behind the four-way change-over valve, cold-producing medium and outdoor air carry out being condensed into high-temperature high-pressure refrigerant liquid after the heat exchange in first heat exchanger, and cold-producing medium is through throttle mechanism throttling step-down afterwards; The gas-liquid two-phase state that becomes low temperature, low pressure gets into second heat exchanger; Cold-producing medium and room air carry out flashing to low-temperature low-pressure refrigerant gas after the heat exchange in second heat exchanger, and cold-producing medium compresses in compressor through the air entry of four-way change-over valve entering compressor afterwards; Become the gas of HTHP, formed a complete kind of refrigeration cycle thus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103463459A CN102506467A (en) | 2011-11-07 | 2011-11-07 | Low-temperature air-conditioning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103463459A CN102506467A (en) | 2011-11-07 | 2011-11-07 | Low-temperature air-conditioning system |
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| CN102506467A true CN102506467A (en) | 2012-06-20 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398444A (en) * | 2013-07-01 | 2013-11-20 | Tcl空调器(中山)有限公司 | Air conditioner low-temperature refrigeration method and device |
| CN104949225A (en) * | 2015-05-22 | 2015-09-30 | 珠海格力电器股份有限公司 | Outdoor unit, air-conditioning system and low-temperature refrigeration method |
| CN105066325A (en) * | 2015-07-15 | 2015-11-18 | 广东美的暖通设备有限公司 | Multi-connected air-conditioning unit control system and method |
| 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 |
| CN110949650A (en) * | 2019-12-04 | 2020-04-03 | 泰豪科技股份有限公司 | Air conditioner anti-freezing system and control method thereof |
| CN111660753A (en) * | 2019-03-05 | 2020-09-15 | 上汽通用汽车有限公司 | Automatic control system for pressure in automobile air conditioner pipe |
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| CN201336646Y (en) * | 2008-11-28 | 2009-10-28 | 朱鸽 | DC-motor stepless speed adjusting gear |
| CN201488138U (en) * | 2009-08-28 | 2010-05-26 | 海信科龙电器股份有限公司 | Air conditioner suitable for refrigeration under low-temperature environment |
| 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 |
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| CN1507145A (en) * | 2002-12-12 | 2004-06-23 | ���µ�����ҵ��ʽ���� | Motor controller |
| WO2007094283A1 (en) * | 2006-02-17 | 2007-08-23 | Daikin Industries, Ltd. | Rpm control device, air conditioner, and rpm control method |
| CN201336646Y (en) * | 2008-11-28 | 2009-10-28 | 朱鸽 | DC-motor stepless speed adjusting gear |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398444A (en) * | 2013-07-01 | 2013-11-20 | Tcl空调器(中山)有限公司 | Air conditioner low-temperature refrigeration method and device |
| CN103398444B (en) * | 2013-07-01 | 2016-12-28 | Tcl空调器(中山)有限公司 | Air conditioner low-temperature refrigeration method and device |
| CN104949225A (en) * | 2015-05-22 | 2015-09-30 | 珠海格力电器股份有限公司 | Outdoor unit, air-conditioning system and low-temperature refrigeration method |
| CN105066325A (en) * | 2015-07-15 | 2015-11-18 | 广东美的暖通设备有限公司 | Multi-connected air-conditioning unit control system and method |
| CN105066325B (en) * | 2015-07-15 | 2018-05-22 | 广东美的暖通设备有限公司 | A kind of VRF Air Conditioning System control system and method |
| 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 |
| CN111660753A (en) * | 2019-03-05 | 2020-09-15 | 上汽通用汽车有限公司 | Automatic control system for pressure in automobile air conditioner pipe |
| CN110949650A (en) * | 2019-12-04 | 2020-04-03 | 泰豪科技股份有限公司 | Air conditioner anti-freezing system and control method thereof |
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Application publication date: 20120620 |