CN105276882B - Condense unit delivery temperature control method - Google Patents
Condense unit delivery temperature control method Download PDFInfo
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- CN105276882B CN105276882B CN201510672808.9A CN201510672808A CN105276882B CN 105276882 B CN105276882 B CN 105276882B CN 201510672808 A CN201510672808 A CN 201510672808A CN 105276882 B CN105276882 B CN 105276882B
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- delivery temperature
- control method
- condensation unit
- temperature control
- compressor frequency
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Abstract
The present invention discloses a kind of condensation unit delivery temperature control method.The condensation unit delivery temperature control method includes：The delivery temperature of detection condensation unit；When T is vented ＞ To_OFF A DEG C, compressor frequency is adjusted, until T exhausts≤To_OFF B DEG C；Wherein A ＜ B, To_OFF are system exhaust temperature protection value, and T exhausts are delivery temperature.According to the condensation unit delivery temperature control method of the present invention, the delivery temperature for condensing unit can be controlled in an ideal value, while the efficiency for ensureing to condense unit is in a high value.
Description
Technical field
The present invention relates to air-conditioning technical field, and unit delivery temperature control method is condensed in particular to one kind.
Background technology
Minimum typically -40 DEG C or so of cryogenic condensation unit evaporating temperature in the market, due to evaporating pressure mistake
Low, the compression ratio of system is higher, causes delivery temperature very high, influences the reliability of system operation.Many producers are in order to control
System exhaust temperature, take the mode of Liquid injection cooling.Liquid refrigerant, which is injected directly into compressor air suction room, can reduce compressor suction
Gas specific enthalpy, reduce inspiratory volume, so as to reach the purpose for reducing delivery temperature, but Liquid injection cooling can reduce system refrigerant simultaneously
Mass flow, reduce the efficiency of system.
The content of the invention
A kind of condensation unit delivery temperature control method is provided in the embodiment of the present invention, can will condense the exhaust temperature of unit
Degree control is in an ideal value, while the efficiency for ensureing to condense unit is in a high value.
To achieve the above object, the embodiment of the present invention provides a kind of condensation unit delivery temperature control method, including：Detection
Condense the delivery temperature of unit；When T is vented ＞ To_OFF-A DEG C, compressor frequency is adjusted, until T exhausts≤To_OFF-B
℃；Wherein A ＜ B, To_OFF are system exhaust temperature protection value, and T exhausts are delivery temperature.
Preferably, compressor frequency is carried out according to formula F (n)=F (n-1)-Kx* (- To_OFF+A DEG C of T exhausts)
Regulation；Wherein F (n) is compressor frequency after n-th regulation, and F (n-1) is compressor frequency after (n-1)th regulation, and Kx is temperature
Proportionality coefficient between degree and frequency change.
Preferably, the step of delivery temperature of detection condensation unit, includes：Condensation is obtained in real time by being vented temperature-sensitive bag
The delivery temperature of unit.
Preferably, when continuous t1 time detectings to T are vented ＞ To_OFF-A DEG C, just compressor frequency is adjusted according to formula
Rate.
Preferably, when compressor frequency is adjusted, per t2 time adjustment first compression unit frequencies.
Preferably, condensation unit delivery temperature control method also includes：When the compressor frequency value calculated according to room temperature
During ＜ current frequency values, compressor frequency is controlled according to room temperature；Or when continuous t3 time detectings to T exhausts≤To_
Compressor frequency is controlled according to room temperature at OFF-B DEG C.
Preferably, A is 10, B 15.
Preferably, t1 is 5s.
Preferably, t2 is 5s.
Preferably, t3 is 5s.
Apply the technical scheme of the present invention, condensation unit delivery temperature control method includes：The exhaust of detection condensation unit
Temperature；When T is vented ＞ To_OFF-A DEG C, compressor frequency is adjusted, until T exhausts≤To_OFF-B DEG C；Wherein A ＜ B, To_
OFF is system exhaust temperature protection value, and T exhausts are delivery temperature.By above-mentioned delivery temperature control method, regulation can be passed through
The mode of compressor frequency is effectively controlled to the delivery temperature for condensing unit, ensures that delivery temperature remains at one
In zone of reasonableness, while the work efficiency of condensation unit can be effectively ensured.
Brief description of the drawings
Fig. 1 is the control principle drawing of the condensation unit delivery temperature control method of the embodiment of the present invention；
Fig. 2 is the control flow chart of the condensation unit delivery temperature control method of the embodiment of the present invention.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, but not as the limit to the present invention
It is fixed.
Referring to shown in Fig. 1 and Fig. 2, according to an embodiment of the invention, condensation unit delivery temperature control method includes：Detection
Condense the delivery temperature of unit；When T is vented ＞ To_OFF-A DEG C, compressor frequency is adjusted, until T exhausts≤To_OFF-B
℃；Wherein A ＜ B, To_OFF are system exhaust temperature protection value, and T exhausts are delivery temperature.To_OFF herein is according to compressor
Difference and be arranged to different values.
By above-mentioned delivery temperature control method, the delivery temperature for condensing unit can be detected first, Ran Hou
When needing the delivery temperature of control condensation unit, effectively to the exhaust temperature of condensation unit by way of adjusting compressor frequency
Degree is controlled, and ensures that delivery temperature is remained in a zone of reasonableness, while the work of condensation unit can be effectively ensured
Make efficiency.
In the present embodiment, can be according to formula F (n)=F (n- when needing the frequency to compressor to be adjusted
1) compressor frequency is adjusted-Kx* (- To_OFF+A DEG C of T exhausts)；Wherein F (n) is compressor frequency after n-th regulation
Rate, F (n-1) are compressor frequency after (n-1)th regulation, and Kx is the proportionality coefficient between temperature and frequency change.
By above-mentioned formula, the working frequency of compressor can be made according to the delivery temperature detected and safety exhaust temperature
Between difference be adjusted according to a certain percentage so that the delivery temperature of unit is stable near a comparatively safe value,
Ensure the reliability of condensation unit work.
The regulation of the frequency of compressor can also be adjusted by way of other are related to delivery temperature, such as can be with
Frequency reducing is limited to compressor in some delivery temperature points by various formula.
The step of delivery temperature of detection condensation unit, includes：Obtain the exhaust of condensation unit in real time by being vented temperature-sensitive bag
Temperature.The detection of condensation unit delivery temperature can also be realized by other means.
When condensing unit work, the problem of detection due to exhaust temperature-sensitive bag itself, excessive discharge temperature occurs once in a while
Phenomenon, and delivery temperature at this moment do not represent condensation unit actual exhaust air temperature, therefore, in order to ensure delivery temperature adjust
The accuracy and reliability of section, in the present embodiment, when continuous t1 time detectings to T be vented ＞ To_OFF-A DEG C when, just according to
Formula adjusts compressor frequency.If continuous t1 time detectings are vented ＞ To_OFF-A DEG C to T, illustrate that delivery temperature surpasses really
Limiting temperature is gone out, it is necessary to be adjusted to delivery temperature.A herein is 10, and certainly, numerical value herein can also be according to condensation
The region of unit work and the actual environment of locality are adjusted, it is only necessary to can ensure to avoid the delivery temperature mistake for condensing unit
Height.T1 herein is, for example, 5s.
When compressor frequency is adjusted, per t2 time adjustment first compression unit frequencies.Due to every time to compressor frequency
When rate is adjusted, does not ensure that the inevitable disposable regulation of compressor frequency in place, therefore, adjusted in the present embodiment per the t2 times
Save first compression unit frequency, it is ensured that compressor frequency adjustment continuity so that compressor frequency can quick regulation arrive
Suitable frequency.T2 herein is, for example, 5s.Preferably, t1=t2, due to t1 be need compressor frequency need regulation when
Continuous detection time, t2 are the adjustment interval of compressor frequency.Both are identical, allow for each frequency adjustment and frequency detecting
Synchronous, the accuracy of guarantee compressor frequency adjustment is realized, improves the efficiency of compressor frequency adjustment.
Condensation unit delivery temperature control method also includes：When the compressor frequency value ＜ that compressor calculates according to room temperature works as
During preceding frequency values, compressor frequency is controlled according to room temperature；Or when continuous t3 time detectings to T exhausts≤To_OFF-B DEG C
When compressor frequency be controlled according to room temperature.B herein is, for example, 15.
In order to ensure room temperature control in a suitable scope, it is also desirable to calculated and compressed according to room temperature by pid algorithm
Unit frequency, when the compressor frequency calculated according to room temperature is less than the compressor frequency that the formula in the present embodiment is calculated
During rate, then compressor is run according to the compressor frequency calculated according to room temperature, now due to the compressor calculated according to room temperature
Frequency is less than the compressor frequency that the formula in the present embodiment is calculated, it is ensured that the frequency of compressor operates in
Lower frequency, excessive discharge temperature is avoided, while it is also ensured that meet storehouse temperature requirement.
In addition, compressor frequency is controlled according to room temperature when continuous t3 time detectings to T exhausts≤To_OFF-B DEG C,
Now if continuous t3 time detectings are to T exhausts≤To_OFF-B DEG C, then explanation condense unit delivery temperature it is relatively low at one
Value, can be such that compressor is controlled according to pid algorithm so that condensation unit work disclosure satisfy that the requirement of storehouse temperature, due to T be vented compared with
It is low, it has been a more satisfactory value, now unit is compressed unit frequency control according to storehouse temperature, at the efficiency that can make condensation unit
In a high value, while meet storehouse temperature requirement.T3 herein is, for example, 5s.
Certainly, above is the preferred embodiment of the present invention.It should be pointed out that for those skilled in the art
For, on the premise of its general principles are not departed from, some improvements and modifications can also be made, these improvements and modifications
It is considered as protection scope of the present invention.
Claims (9)
1. one kind condensation unit delivery temperature control method, it is characterised in that including：
The delivery temperature of detection condensation unit；
When T is vented ＞ To_OFF-A DEG C, compressor frequency is adjusted, until T exhausts≤To_OFF-B DEG C；
Wherein A ＜ B, To_OFF are system exhaust temperature protection value, and T exhausts are delivery temperature；
Compressor frequency is adjusted according to formula F (n)=F (n-1)-Kx* (- To_OFF+A DEG C of T exhausts)；
Wherein F (n) is compressor frequency after n-th regulation, and F (n-1) is compressor frequency after (n-1)th regulation, and Kx is temperature
Proportionality coefficient between changing with frequency.
2. condensation unit delivery temperature control method according to claim 1, it is characterised in that the detection condensation unit
Delivery temperature the step of include：Obtain the delivery temperature of condensation unit in real time by being vented temperature-sensitive bag.
3. condensation unit delivery temperature control method according to claim 1, it is characterised in that when continuous t1 time detectings
When being vented ＞ To_OFF-A DEG C to T, just compressor frequency is adjusted according to the formula.
4. condensation unit delivery temperature control method according to claim 1, it is characterised in that carried out to compressor frequency
During regulation, per t2 time adjustment first compression unit frequencies.
5. condensation unit delivery temperature control method according to claim 1, it is characterised in that the condensation unit exhaust
Temprature control method also includes：
When the compressor frequency value ＜ current frequency values calculated according to room temperature, compressor frequency is controlled according to room temperature；
Or
When continuous t3 time detectings to T exhausts≤To_OFF-B DEG C, compressor frequency is controlled according to room temperature.
6. condensation unit delivery temperature control method according to claim 1, it is characterised in that A 10, B 15.
7. condensation unit delivery temperature control method according to claim 3, it is characterised in that t1 5s.
8. condensation unit delivery temperature control method according to claim 4, it is characterised in that t2 5s.
9. condensation unit delivery temperature control method according to claim 5, it is characterised in that t3 5s.
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| CN201510672808.9A CN105276882B (en) | 2015-10-15 | 2015-10-15 | Condense unit delivery temperature control method |
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| CN201510672808.9A CN105276882B (en) | 2015-10-15 | 2015-10-15 | Condense unit delivery temperature control method |
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| CN109458776B (en) * | 2016-10-18 | 2021-03-23 | 珠海格力电器股份有限公司 | Condensing unit operation control method and device and refrigeration equipment with same |
| CN107036256B (en) * | 2017-05-31 | 2019-06-11 | 广东美的制冷设备有限公司 | The control method of delivery temperature, the control device of delivery temperature and air conditioner |
| CN111380185B (en) * | 2020-03-27 | 2021-10-26 | 广东美的制冷设备有限公司 | Compressor exhaust temperature frequency limiting control method, air conditioner and readable storage medium |
| CN112178978B (en) * | 2020-10-15 | 2022-04-12 | 广东纽恩泰新能源科技发展有限公司 | Protection control method for overhigh exhaust temperature of variable frequency heat pump |
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| KR100565997B1 (en) * | 2003-10-08 | 2006-03-30 | 위니아만도 주식회사 | Method for controlling exhausted temperature by compressor of multi type air-conditioner |
| KR20090029515A (en) * | 2007-09-18 | 2009-03-23 | 엘지전자 주식회사 | Air-conditioner of the control method |
| CN101368766A (en) * | 2008-08-01 | 2009-02-18 | 广东美的电器股份有限公司 | Air conditioner for pressure reducing protection by discharge temperature |
| CN102230662A (en) * | 2011-06-21 | 2011-11-02 | 宁波奥克斯电气有限公司 | Method for judging fault of direct-current frequency conversion variable refrigerant volume (VRV) air conditioning module |
| CN102345915B (en) * | 2011-08-02 | 2013-11-27 | 宁波奥克斯电气有限公司 | Fault operation control method of DC (direct current) convertible frequency air conditioner |
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