CN107120881A - A kind of guard method in heat pump compressor running - Google Patents
A kind of guard method in heat pump compressor running Download PDFInfo
- Publication number
- CN107120881A CN107120881A CN201710378837.3A CN201710378837A CN107120881A CN 107120881 A CN107120881 A CN 107120881A CN 201710378837 A CN201710378837 A CN 201710378837A CN 107120881 A CN107120881 A CN 107120881A
- Authority
- CN
- China
- Prior art keywords
- heat pump
- frequency
- pump compressor
- guard method
- oil return
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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 method in a kind of heat pump compressor running, including conversion process guard method and oil return control process guard method, the frequency conversion guard method includes：Every a period of the conversion time section provided with a pause frequency conversion in conversion process, the ratio between the time span of period of the conversion time section with suspending frequency conversion is 1：12；The oil return control guard method includes：Heat pump compressor is converted to oil return frequency after oil return control condition is met, the oil return control condition is：In the continuous frequency operated in less than 1/8th limiting frequencies for 60 minutes of heat pump compressor, the scope of the oil return frequency is：Fluctuate 5Hz up and down centered on the 60% of limiting frequency.The Industry for not having a set of effective method specifically designed for extension heat pump compressor service life in industry is solved using frequency conversion guard method and oil return control guard method, the service life of heat pump compressor is improved.
Description
Technical field
The present invention relates to heat pump technical field, the protection side in more particularly to a kind of heat pump compressor running
Method.
Background technology
Heat pump compressor is the core component of whole heat pump, and present heat pump compressor is easiest to go wrong and shadow
Ring the action of its service life to act for heat pump compressor frequency conversion, the VFC mode of existing heat pump compressor is stepping frequency
Rate control methods.
Whole heat pump compressor running frequency scope is mainly divided into multiple frequency shelves by the stepping FREQUENCY CONTROL method, often
Differ several hertz or more than ten hertz between shelves, certain temperature difference corresponds to corresponding frequency shelves, when the temperature difference is changed, frequency just on
Rise or decline one grade or multi gear.
But this stepping FREQUENCY CONTROL method is general by the way of directly linearly lifting during gear is lifted, institute
The linear lifting of meaning refers to carrying out lifting frequency to reach target gear with constant speed.
Present heat pump compressor manufacturer does not have the excessive angle from VFC to consider that heat pump compressor is used
The problem of life-span, and the predecessor of 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 in Frequency Conversion Compressor use time, it is typically all to be used when summer weather is warmmer, therefore its service life is not
Excessive consideration is needed, but heat pump compressor is then all being used for 24 hours one day, therefore heat pump compressor can not continue to use air-conditioning
That methodology of frequency-changeable compressor, is badly in need of designing a set of special protection heat pump compressor extending the side of its service life
Method.
The content of the invention
It is a set of effective specifically designed for extension heat pump present invention aim to address not having in current heat pump compressor industry
The Industry of the method for compressor service life.
The present invention solve its technical problem solution be：A kind of guard method in heat pump compressor running,
Including conversion process guard method and oil return control process guard method, the frequency conversion guard method includes：In conversion process
Every a period of the conversion time section provided with a pause frequency conversion, period of the conversion time section with suspending frequency conversion
The ratio between time span is 1：12；The oil return control guard method includes：By heat pump compressor after oil return control condition is met
Oil return frequency is converted to, the oil return control condition is：Heat pump compressor is operated in less than 1/8th poles for continuous 60 minutes
In the frequency for limiting frequency, the scope of the oil return frequency is：Fluctuate 5Hz up and down centered on the 60% of limiting frequency.
Further, in addition to initial start guard method, the initial start guard method includes step：Start heat pump pressure
Contracting machine；By the frequency of heat pump compressor to pre-heat frequency；The scope of the pre-heat frequency is：45% with limiting frequency is
The upper limit fluctuates downwards 10Hz.
Further, frequency conversion is carried out with unit speed in conversion time section, the unit speed is that 1Hz is per second.
Further, also comprised determining whether before the startup heat pump compressor step in the initial start guard method
Meet entry condition step；The entry condition is：Heat pump compressor keeps the heat pump of continuous more than 3 minutes before being initiated
Compressor halted state.
The beneficial effects of the invention are as follows：Being solved using frequency conversion guard method and oil return control guard method in industry is not had
The Industry of a set of effective method specifically designed for extension heat pump compressor service life, improves making for heat pump compressor
Use the life-span.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment
Accompanying drawing is briefly described.Obviously, described accompanying drawing is a part of embodiment of the present invention, rather than is all implemented
Example, those skilled in the art on the premise of not paying creative work, can also obtain other designs according to these accompanying drawings
Scheme and accompanying drawing.
Fig. 1 is the step relation schematic diagram of the guard method in heat pump compressor running；
Fig. 2 is the step relation schematic diagram of initial start guard method.
Embodiment
The technique effect of the design of the present invention, concrete structure and generation is carried out below with reference to embodiment and accompanying drawing clear
Chu, it 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 embodiment, rather than whole embodiments, based on embodiments of the invention, those skilled in the art is not paying
The other embodiment obtained on the premise of creative work, belongs to the scope of protection of the invention.In addition, be previously mentioned in text
All connection/annexations, not singly refer to component and directly connect, and refer to be added deduct by adding according to specific implementation situation
Few couple auxiliary, to constitute more excellent draw bail.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, the guard method in a kind of heat pump compressor running, the present embodiment is with limiting frequency
For the guard method in a kind of heat pump compressor running is described exemplified by 120Hz heat pump compressor, the limit
Frequency refers to the upper limit of heat pump compressor rated frequency, and step is 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 into step S11；The frequency conversion instruction is：Heat pump compressor to target frequency
Rate frequency conversion；The condition that the entrance oil return is controlled is：Heat pump compressor is operated in less than 1/8th limit for continuous 60 minutes
In the frequency of frequency.
S1：Heat pump compressor controller controls heat pump compressor to carry out frequency conversion with speed per second 1Hz, and countdown 10s is opened
Begin；
S2：Judge whether to reach target frequency every 1s, otherwise into step S4, be, complete frequency conversion；
S3：Judge whether countdown terminates, be then to enter step S4, otherwise continue step S3；
S4：Heat pump compressor pause frequency conversion 120s；
S5：Judge whether pause frequency conversion reaches 120s, be then return to step S1, otherwise continue step S5；
S11：The frequency of heat pump compressor is run 3 minutes into oil return frequency；The scope of the oil return frequency is：
Fluctuate 5Hz up and down centered on the 60% of limiting frequency, when limiting frequency is 120Hz, then the scope of oil return frequency is 67Hz-
77Hz, because 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 for controlling to terminate to oil return, therefore 5Hz fluctuation belongs to the scope allowed in commercial Application up and down.Returning in the present embodiment
The scope of oily frequency is 67Hz-77Hz.
The determination at its scope center when the determination of oil return frequency range is most important, but the center of oil return frequency range
It is determined that accumulated by substantial amounts of practical experience, and in industry be also to its determination as obtained by long-term conventional experience,
A not accurate theoretical value, applicant passes through a large amount of practical experiences and test is found：Centrally disposed when frequency is more than
Limiting frequency 65% when, it may appear that the vibration of heat pump compressor is excessive during oil return, influence heat pump compressor life-span, when
Frequency it is centrally disposed less than limiting frequency 55% when, then the insufficient situation of oil return occurs, long-term is insufficient
Oil return can make it that the phenomenon of card cylinder easily occurs in heat pump compressor, influence the use of heat pump compressor.
The present embodiment is using 10Hz as a stage, so conversion time section is 10s, corresponding heat pump compressor pause
The period of frequency conversion is 120s.Can certainly using other times section, only need to meet conversion time section with suspend frequency conversion when
Between the ratio between the time span of section be 1：12 just can be with.
Because the principle of the frequency-variable controller of heat pump frequency-changeable compressor is that the alternating current in power network is converted into square-wave pulse
Output.By the frequency for adjusting square-wave pulse, it is possible to the motor speed of control driving compressor.When frequency rises or falls,
Motor speed also accordingly rises or falls, when motor speed is risen or fallen with certain acceleration, and the load of motor will be big
Traveled at the uniform speed in it, and the time of acceleration or deceleration is longer, and its internal load is bigger, in order to reduce motor load, in motor
Need to keep traveling at the uniform speed for a period of time after acceleration, in order to ensure that this travels at the uniform speed, need frequency-variable controller to ensure 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 individual period is less than 12 times of motor acceleration or deceleration process time length, motor be able to not can be optimal
Stable state, when the time span of this period is more than 12 times of motor acceleration or deceleration process time length, although
Motor can be stabilized, but consume time resource so that heat pump compressor completes the overlong time of frequency conversion.
With using guard method in the running of the present embodiment and without the heat pump using guard method in running
Compressor carries out life test, and test environment is：Simulate the temperature Change in the March of Beijing area；Testing time is：744 is small
When；Test pattern：Heat pump compressor continuously works；The assessment algorithm in life-span is：By the measurement analogy measuring and calculating of noise decibels.
The data of obtained test such as table 1, the wherein unit in life-span are hour.
Table 1
Do not used and run using the average life span ratio of the heat pump compressor of guard method in running as known from Table 1
The average life span length 24.2% of guard method in journey.
As known from Table 1, guard method has significant effect to the extension heat pump compressor life-span in running.
With reference to Fig. 2, as optimization, in addition to initial start guard method, the initial start guard method includes step：
S21：Whether detection heat pump compressor keeps the heat pump compressor halted state of 3 minutes before starting.
S22：Start 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 scope of pre-heat frequency is 44Hz-54Hz；Determination use for pre-heat frequency scope first determines pre-heat frequency
The upper limit, the method that 10Hz is then fluctuated downwards determines that the method for the upper limit is determined according to noise decibel, when the upper limit is more than limit frequency
Rate 45% when, the noise of heat pump compressor will be excessive, and the vibration of whole heat pump compressor is obvious, in general, heat pump compression
The noise frequency that machine is sent not should be greater than the 75% of the resonant frequency of heat pump compressor, when noise frequency is more than heat pump compressor
Resonant frequency 75% when, heat pump compressor just occurs obvious for sense, and 10Hz is fluctuated downwards as pre-heat frequency
It is then to belong to the fluctuation range industrially allowed.
Above-mentioned initial start guard method is tested, test environment is：The temperature for simulating the March of Beijing area becomes
Change；Testing time is：744 hours；Test pattern：Interval restarts for 48 hours；The assessment algorithm in life-span is：By noise decibel
Number measurement analogy measuring and calculating.
The data of obtained test such as table 2, table 2 is using initial start guard method and without using initial start protection
The correction data of method.Wherein the unit in life-span 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 length 0.5% of guard method.
The better embodiment to the present invention is illustrated above, but the invention is not limited to the implementation
Example, those skilled in the art can also make a variety of equivalent modifications or replace on the premise of without prejudice to spirit of the invention
Change, these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (4)
1. the guard method in a kind of heat pump compressor running, it is characterised in that：Including conversion process guard method and return
Oily control process guard method, the frequency conversion guard method includes：In conversion process one is provided with every a conversion time section
The period of individual pause frequency conversion, the conversion time section is 1 with suspending the ratio between time span of period of frequency conversion：12；It is described
Oil return control guard method includes：Heat pump compressor is converted to oil return frequency, the oil return after oil return control condition is met
Control condition is：In the continuous frequency operated in less than 1/8th limiting frequencies for 60 minutes of heat pump compressor, the oil return
The scope of frequency is：Fluctuate 5Hz up and down centered on the 60% of limiting frequency.
2. the guard method in a kind of heat pump compressor running according to claim 1, it is characterised in that：Also include
Initial start guard method, the initial start guard method includes step：Start heat pump compressor；By the frequency of heat pump compressor
Rate is converted to pre-heat frequency；The scope of the pre-heat frequency is：It is that the upper limit fluctuates downwards 10Hz with the 45% of limiting frequency.
3. the guard method in a kind of heat pump compressor running 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 running according to claim 2, it is characterised in that：Described
Also comprise determining whether to meet entry condition step before startup heat pump compressor step in initial start guard method；It is described
Entry condition is：Heat pump compressor keeps the heat pump compressor halted state of continuous more than 3 minutes 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107120881A true CN107120881A (en) | 2017-09-01 |
| CN107120881B CN107120881B (en) | 2019-05-03 |
Family
ID=59730033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710378837.3A Active CN107120881B (en) | 2017-05-25 | 2017-05-25 | A kind of guard method in heat pump compressor operational process |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107120881B (en) |
| WO (1) | WO2018214755A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018214755A1 (en) * | 2017-05-25 | 2018-11-29 | 广东智科电子股份有限公司 | Protection method for heat pump compressor during operation 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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| 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 |
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| 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
-
2018
- 2018-05-11 WO PCT/CN2018/086530 patent/WO2018214755A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| KR20140100286A (en) * | 2013-02-06 | 2014-08-14 | 한라비스테온공조 주식회사 | Method for controlling a compressor of heat pump system for automobile |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018214755A1 (en) * | 2017-05-25 | 2018-11-29 | 广东智科电子股份有限公司 | Protection method for heat pump compressor during operation 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018214755A1 (en) | 2018-11-29 |
| CN107120881B (en) | 2019-05-03 |
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