CN107120881B - A kind of guard method in heat pump compressor operational process - Google Patents
A kind of guard method in heat pump compressor operational process Download PDFInfo
- Publication number
- CN107120881B CN107120881B CN201710378837.3A CN201710378837A CN107120881B CN 107120881 B CN107120881 B CN 107120881B CN 201710378837 A CN201710378837 A CN 201710378837A CN 107120881 B CN107120881 B CN 107120881B
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- Prior art keywords
- heat pump
- frequency
- pump compressor
- guard method
- conversion
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
Abstract
The invention discloses the guard methods in a kind of heat pump compressor operational process; including conversion process guard method and oil return control process guard method; the conversion process guard method includes: to be equipped with the period of a pause frequency conversion every a conversion time section in conversion process, and the ratio between the conversion time section and the time span of period of pause frequency conversion are 1:12；The oil return control process guard method includes: that heat pump compressor is converted to oil return frequency after meeting oil return control condition; the oil return control condition are as follows: in the continuous 60 minutes frequencies operated in lower than 1/8th limiting frequencies of heat pump compressor, the range of the oil return frequency are as follows: fluctuate 5Hz up and down centered on the 60% of limiting frequency.It is solved in industry without a set of using conversion process guard method and oil return control process guard method effectively specifically for the Industry for the method for extending heat pump compressor service life, improves the service life of heat pump compressor.
Description
Technical field
Protection side the present invention relates to heat pump system technical field, in particular in a kind of heat pump compressor operational process
Method.
Background technique
Heat pump compressor is the core component of entire heat pump system, and present heat pump compressor is easiest to go wrong and shadow
The movement of its service life is rung for heat pump compressor frequency conversion movement, and the frequency control mode of existing heat pump compressor is stepping frequency
Rate control methods.
Entire heat pump compressor running frequency range is mainly divided into multiple frequency shelves by the stepping frequency control methods, often
Differ several hertz or more than ten hertz between shelves, certain temperature difference corresponds to corresponding frequency shelves, when the temperature difference changes, frequency just on
Rise or decline one grade or multi gear.
However this stepping frequency control methods during gear is gone up and down generally using it is direct linearly go up and down by the way of, institute
The linear lifting of meaning refers to carrying out lifting frequency with constant speed to reach target gear.
There is no excessive from the viewpoint of frequency control that heat pump compressor uses for present heat pump compressor manufacturer
The problem of service life, and the predecessor, enterprise of many production heat pump compressors is production Frequency Conversion Compressor now, so
To in the control of heat pump compressor, now many heat pump compressors still continue to use the control method of Frequency Conversion Compressor, by
It is short using the time in Frequency Conversion Compressor, it is typically used when summer weather is warmmer, therefore its service life is not
Excessive consideration is needed, however heat pump compressor is then all using for 24 hours one day, therefore heat pump compressor cannot continue to use air-conditioning
That methodology of frequency-changeable compressor is badly in need of designing side of a set of special protection heat pump compressor to prolong its service life
Method.
Summary of the invention
Present invention aim to address in current heat pump compressor industry without it is a set of effectively specifically for extend heat pump
The Industry of the method for compressor service life.
The solution that the present invention solves its technical problem is: the guard method in a kind of heat pump compressor operational process,
Including conversion process guard method and oil return control process guard method, the conversion process guard method includes: in frequency conversion
The period of a pause frequency conversion, the time of the conversion time section and pause frequency conversion are equipped in journey every a conversion time section
The ratio between time span of section is 1:12；The oil return control process guard method includes: will be hot after meeting oil return control condition
Pump compressor is converted to oil return frequency, the oil return control condition are as follows: operates in lower than eight within heat pump compressor continuous 60 minutes
In the frequency of/mono- limiting frequency, the range of the oil return frequency are as follows: the fluctuation up and down centered on the 60% of limiting frequency
5Hz。
It further, further include initial start guard method, the initial start guard method is comprising steps of starting heat pump pressure
Contracting machine；By the frequency of heat pump compressor to pre-heat frequency；The range of the pre-heat frequency are as follows: 45% with limiting frequency is
The upper limit fluctuates downwards 10Hz.
Further, frequency conversion is carried out with unit speed in the conversion time section, the unit speed is that 1Hz is per second.
It further, further include judging whether before the starting heat pump compressor step in the initial start guard method
Meet entry condition step；The entry condition are as follows: heat pump compressor keeps continuous 3 minutes or more heat pumps before being initiated
Compressor halted state.
The beneficial effects of the present invention are: solving row using conversion process guard method and oil return control process guard method
Heat pump pressure is improved effectively specifically for the Industry for the method for extending heat pump compressor service life without a set of in the industry
The service life of contracting machine.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described.Obviously, described attached drawing is a part of the embodiments of the present invention, rather than is all implemented
Example, those skilled in the art without creative efforts, can also be obtained according to these attached drawings other designs
Scheme and attached drawing.
Fig. 1 is the step relation schematic diagram of the guard method in heat pump compressor operational process；
Fig. 2 is the step relation schematic diagram of initial start guard method.
Specific embodiment
It is carried out below with reference to technical effect of the embodiment and attached drawing to design of the invention, specific structure and generation clear
Chu is fully described by, to be completely understood by the purpose of the present invention, feature and effect.Obviously, described embodiment is this hair
Bright a part of the embodiment, rather than whole embodiments, based on the embodiment of the present invention, those skilled in the art are not being paid
Other embodiments obtained, belong to the scope of protection of the invention under the premise of creative work.In addition, be previously mentioned in text
All connection/connection relationships not singly refer to that component directly connects, and referring to can be added deduct according to specific implementation situation by adding
Few couple auxiliary, Lai Zucheng more preferably coupling structure.Each technical characteristic in the invention, in not conflicting conflict
Under the premise of can be with combination of interactions.
Embodiment 1, with reference to Fig. 1, a kind of guard method in heat pump compressor operational process, the present embodiment is with limiting frequency
For the guard method in a kind of heat pump compressor operational process is described for the heat pump compressor of 120Hz, the limit
Frequency refers to the upper limit of heat pump compressor rated frequency, and steps are as follows:
S0: heat pump compressor controller receives frequency conversion instruction or heat pump compressor meets oil return control condition；Receive frequency conversion
Instruction enters step S1, receives oil return control instruction and enters step S11；The frequency conversion instruction are as follows: heat pump compressor to target frequency
Rate frequency conversion；The condition controlled into oil return are as follows: operate in lower than 1/8th limit for heat pump compressor continuous 60 minutes
In the frequency of frequency.
S1: heat pump compressor controller controls heat pump compressor and carries out frequency conversion with speed 1Hz per second, and countdown 10s is opened
Begin；
S2: judge whether to reach target frequency every 1s, otherwise enter step S3, be, complete frequency conversion；
S3: judging whether countdown terminates, and is, enters step S4, otherwise continues step S3；
S4: heat pump compressor suspends frequency conversion 120s；
S5: judging to suspend whether frequency conversion reaches 120s, is then return step S1, otherwise continues step S5；
S11: the frequency of heat pump compressor is run 3 minutes into oil return frequency；The range of the oil return frequency are as follows:
Fluctuate 5Hz up and down centered on the 60% of limiting frequency, when limiting frequency is 120Hz, then the range of oil return frequency is 67Hz-
77Hz, since for oil return frequency, the fluctuation up and down with 5Hz has no effect on the quality of oil return, but slightly affected
The time terminated to oil return control, therefore the fluctuation of 5Hz belongs to the range allowed in industrial application up and down.Returning in the present embodiment
The range of oily frequency is 67Hz-77Hz.
The determination at its range center when the determination of oil return frequency range is most important, however the center of oil return frequency range
Determination be accumulated by a large amount of practical experience, and industry in its determination be also as obtained by experience for a long time,
There is no an accurate theoretical value, applicant is had found by a large amount of practical experiences and test: when the center of frequency, setting is greater than
Limiting frequency 65% when, it may appear that the vibration of heat pump compressor is excessive when oil return, influences the service life of heat pump compressor, when
When the center setting of frequency is less than the 55% of limiting frequency, then it will appear the insufficient situation of oil return, long-term is insufficient
Oil return meeting so that the phenomenon that heat pump compressor is easy to appear card cylinder, influences the use of heat pump compressor.
The present embodiment is with 10Hz for a stage, so conversion time section is 10s, corresponding heat pump compressor suspends
The period of frequency conversion is 120s.Can certainly use other times section, only need to meet conversion time section and suspend frequency conversion when
Between the ratio between the time span of section can for 1:12.
Since the principle of the frequency-variable controller of heat pump frequency-changeable compressor is that the alternating current in power grid is converted into square-wave pulse
Output.By the frequency for adjusting square-wave pulse, so that it may the motor speed of control driving compressor.When frequency rises or falls,
Motor speed also accordingly rises or falls, and when motor speed is risen or fallen with certain acceleration, the load of motor will be big
It travels at the uniform speed in it, and the time of acceleration or deceleration is longer, internal load is bigger, in order to reduce motor load, in motor
It needs to keep traveling at the uniform speed for a period of time after acceleration, in order to guarantee that this travels at the uniform speed, frequency-variable controller is needed to guarantee one section
Suspend the time of frequency conversion, the time span of the period is exactly 12 times of motor acceleration or deceleration process time length, when this
When the time span of a period is less than 12 times of motor acceleration or deceleration process time length, motor can not be optimal
Stable state, when the time span of this period is greater than 12 times of motor acceleration or deceleration process time length, although
Motor can stabilize, but consume time resource, so that heat pump compressor completes the overlong time of frequency conversion.
Using guard method in the operational process of the present embodiment and without the heat pump using guard method in operational process
Compressor carries out life test, tests environment are as follows: simulate the temperature change in the March of Beijing area；Testing time are as follows: 744 is small
When；Test pattern: heat pump compressor continuous work；The assessment algorithm in service life are as follows: by the measurement analogy measuring and calculating of noise decibels.
The data of obtained test such as table 1, wherein the unit in service life is hour.
Table 1
It is not used and was run using the average life span ratio of the heat pump compressor of guard method in operational process as known from Table 1
The average life span of guard method in journey long 24.2%.
As known from Table 1, guard method has significant effect to the heat pump compressor service life is extended in operational process.
As optimization further include initial start guard method with reference to Fig. 2, the initial start guard method comprising steps of
S21: whether detection heat pump compressor starting keeps 3 minutes heat pump compressor halted states before.
S22: starting heat pump compressor；
S23: by the frequency of heat pump compressor to pre-heat frequency.The limiting frequency of the present embodiment heat pump compressor is
120Hz, so the range of pre-heat frequency is 44Hz-54Hz；For determining using first determining pre-heat frequency for pre-heat frequency range
The upper limit, then the method for fluctuation 10Hz, the method for determining the upper limit are determined according to noise decibel downwards, when the upper limit is greater than limit frequency
Rate 45% when, the noise of heat pump compressor will be excessive, and the vibration of entire heat pump compressor is obvious, in general, heat pump compression
The noise frequency that machine issues should not exceed the 75% of the resonant frequency of heat pump compressor, when noise frequency is greater than heat pump compressor
Resonant frequency 75% when, heat pump compressor just will appear apparent for sense, fluctuate 10Hz downwards as pre-heat frequency
It is then to belong to the fluctuation range industrially allowed.
Above-mentioned initial start guard method is tested, environment is tested are as follows: the temperature for simulating the March of Beijing area becomes
Change；Testing time are as follows: 744 hours；Test pattern: interval restarts for 48 hours；The assessment algorithm in service life are as follows: press noise decibel
Number measurement analogy measuring and calculating.
The data of obtained test such as table 2, table 2 are using initial start guard method and without being protected using initial start
The correlation data of method.Wherein the unit in service life is hour.
Table 2
Initial start is not used using the average life span ratio of the heat pump compressor of initial start guard method as known from Table 2
The average life span of guard method long 0.5%.
Better embodiment of the invention is illustrated above, but the invention is not limited to the implementation
Example, those skilled in the art can also make various equivalent modifications on the premise of without prejudice to spirit of the invention or replace
It changes, these equivalent variation or replacement are all included in the scope defined by the claims of the present application.
Claims (4)
1. the guard method in a kind of heat pump compressor operational process, it is characterised in that: including conversion process guard method and return
Oily control process guard method, the conversion process guard method include: to set in conversion process every a conversion time section
There is the period of a pause frequency conversion, the ratio between the conversion time section and the time span of period of pause frequency conversion are 1:12；
The oil return control process guard method includes: that heat pump compressor is converted to oil return frequency after meeting oil return control condition,
The oil return control condition are as follows: in the continuous 60 minutes frequencies operated in lower than 1/8th limiting frequencies of heat pump compressor,
The range of the oil return frequency are as follows: fluctuate 5Hz up and down centered on the 60% of limiting frequency.
2. the guard method in a kind of heat pump compressor operational process according to claim 1, it is characterised in that: further include
Initial start guard method, the initial start guard method is comprising steps of starting heat pump compressor；By the frequency of heat pump compressor
Rate is converted to pre-heat frequency；The range of the pre-heat frequency are as follows: fluctuate 10Hz downwards with the 45% of limiting frequency for the upper limit.
3. the guard method in a kind of heat pump compressor operational process according to claim 1, it is characterised in that: described
Frequency conversion is carried out with unit speed in conversion time section, the unit speed is that 1Hz is per second.
4. the guard method in a kind of heat pump compressor operational process according to claim 2, it is characterised in that: described
It further include judging whether to meet entry condition step before starting heat pump compressor step in initial start guard method；It is described
Entry condition are as follows: heat pump compressor keeps continuous 3 minutes or more heat pump compressor halted states before being initiated.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710378837.3A CN107120881B (en) | 2017-05-25 | 2017-05-25 | A kind of guard method in heat pump compressor operational process |
| PCT/CN2018/086530 WO2018214755A1 (en) | 2017-05-25 | 2018-05-11 | Protection method for heat pump compressor during operation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710378837.3A CN107120881B (en) | 2017-05-25 | 2017-05-25 | A kind of guard method in heat pump compressor operational process |
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| Publication Number | Publication Date |
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| CN107120881A CN107120881A (en) | 2017-09-01 |
| CN107120881B true CN107120881B (en) | 2019-05-03 |
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| CN201710378837.3A Active CN107120881B (en) | 2017-05-25 | 2017-05-25 | A kind of guard method in heat pump compressor operational process |
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| WO (1) | WO2018214755A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120881B (en) * | 2017-05-25 | 2019-05-03 | 广东智科电子股份有限公司 | A kind of guard method in heat pump compressor operational process |
| CN110762733A (en) * | 2019-10-30 | 2020-02-07 | 南京亚派软件技术有限公司 | Online frequency conversion control method and device for cooling pump of central air conditioner |
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| CN1566836A (en) * | 2003-06-24 | 2005-01-19 | 乐金电子(天津)电器有限公司 | Control method for reducing noise for dehumidifying air-conditioner |
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| KR20140100286A (en) * | 2013-02-06 | 2014-08-14 | 한라비스테온공조 주식회사 | Method for controlling a compressor of heat pump system for automobile |
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| CN104764168A (en) * | 2015-04-21 | 2015-07-08 | 广东志高空调有限公司 | Method and device for improving oil return efficiency of household variable frequency air conditioner after low-frequency running |
| CN105371531B (en) * | 2015-11-30 | 2018-02-09 | 珠海格力电器股份有限公司 | The low frequency method for controlling oil return and system of air conditioner |
| CN106091479B (en) * | 2016-06-16 | 2018-06-01 | 珠海格力电器股份有限公司 | Air conditioner and its method for controlling oil return and device |
| CN106246523A (en) * | 2016-08-18 | 2016-12-21 | 合肥美的电冰箱有限公司 | Frequency-changeable compressor control method, controller and refrigerator |
| CN107120881B (en) * | 2017-05-25 | 2019-05-03 | 广东智科电子股份有限公司 | A kind of guard method in heat pump compressor operational process |
-
2017
- 2017-05-25 CN CN201710378837.3A patent/CN107120881B/en active Active
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2018
- 2018-05-11 WO PCT/CN2018/086530 patent/WO2018214755A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1566836A (en) * | 2003-06-24 | 2005-01-19 | 乐金电子(天津)电器有限公司 | Control method for reducing noise for dehumidifying air-conditioner |
| CN104006504A (en) * | 2014-06-19 | 2014-08-27 | 广东志高空调有限公司 | Variable frequency air conditioner low-frequency operating control method and control device |
| CN105758065A (en) * | 2016-02-29 | 2016-07-13 | 青岛海尔空调电子有限公司 | Oil return control method for air conditioner system |
| CN105864969A (en) * | 2016-04-11 | 2016-08-17 | 广东美的暖通设备有限公司 | Low-frequency running starting method and system after silent placement of variable-frequency air conditioner and air conditioner |
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| Publication number | Publication date |
|---|---|
| WO2018214755A1 (en) | 2018-11-29 |
| CN107120881A (en) | 2017-09-01 |
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