CN107726682A - The anti-refrigeration control method of source pump - Google Patents
The anti-refrigeration control method of source pump Download PDFInfo
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- CN107726682A CN107726682A CN201710946984.6A CN201710946984A CN107726682A CN 107726682 A CN107726682 A CN 107726682A CN 201710946984 A CN201710946984 A CN 201710946984A CN 107726682 A CN107726682 A CN 107726682A
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- temperature
- outdoor environment
- frozen mode
- preset
- inflow
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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
- F25B49/005—Arrangement or mounting of control or safety devices of safety devices
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2106—Temperatures of fresh outdoor air
Abstract
The present invention relates to air conditioner technical field, and in particular to a kind of anti-refrigeration control method of source pump.Present invention seek to address that the problem of existing anti-refrigeration control method of source pump is excessively simple, control accuracy is low.For this purpose, the anti-refrigeration control method of source pump of the present invention comprises the following steps：Obtain outdoor environment temperature；According to the inflow temperature of the outdoor environment temperature, optionally acquisition water circulation system；Based on the outdoor environment temperature and the inflow temperature, judge whether to open anti-frozen mode.Whether the inflow temperature comprehensive descision of the invention based on outdoor environment temperature and water circulation system opens anti-frozen mode, is precisely controlled with realizing that source pump is cryoprotective, so as to effectively prevent heat exchanger from occurring damaging phenomenon caused by freezing.
Description
Technical field
The present invention relates to air conditioner technical field, and in particular to a kind of anti-refrigeration control method of source pump.
Background technology
Air-Cooled Heat Pump Unit is using air as cold (heat) source, is exchanged heat, is freezed by refrigerant and water of refrigerant
Water after (heat) provides cold (heat) for desired zone by secondary heat exchange and measured.Air-Cooled Heat Pump Unit with energy-saving and environmental protection, flexible group
The advantages that closing, be easy for installation is just increasing increasingly in occupation rate of market, cold water is provided to air-conditioning system in refrigeration season, in Heating Season
Save to air-conditioning system and hot water is provided, be preferable air conditioner cold-heat source.
In the winter time under heating mode, air conditioner is in standby mode after reaching heating temperature, and compressor and water pump are located
In stopped status.Water system can not normal circulation, have water inside heat exchanger but flowed without water, when ambient temperature is less than
During freezing temperature point, icing occurs in heat exchanger, and icing can cause occur spalling inside heat exchanger, cause heat exchanger to damage, machine
Group can not normal operation.And existing anti-refrigeration control method is typically judged using return water temperature, when return water temperature is less than default
System opens water pump or press during protection value, ensures water system circulation or unit operation.This method is excessively simple, and control accuracy
It is low, for example when return water temperature fluctuates back and forth up and down in a certain temperature, system is can not to judge whether that entering anti-freezing controls,
It is likely that there are erroneous judgement.
Therefore, this area needs a kind of new method to solve the above problems.
The content of the invention
It has been the anti-refrigeration control method mistake of the existing source pump of solution to solve above mentioned problem of the prior art
In the problem of simple, control accuracy is low, the invention provides a kind of anti-refrigeration control method of source pump, this method includes following
Step：Obtain outdoor environment temperature；According to the inflow temperature of the outdoor environment temperature, optionally acquisition water circulation system；
Based on the outdoor environment temperature and the inflow temperature, judge whether to open anti-frozen mode.
In the preferred embodiment of the above method, before the step of " acquisition outdoor environment temperature ", methods described bag
Include：In a heating mode, detect the compressor of the source pump and whether the water pump of the water circulation system is in shutting down
State；If it is, obtain outdoor environment temperature.
In the preferred embodiment of the above method, " according to the outdoor environment temperature, water circulation system is optionally obtained
The step of inflow temperature of system ", includes：When the outdoor environment temperature is more than or equal to the first preset temperature, water circulation system is obtained
The inflow temperature of system；When the outdoor environment temperature is less than the first preset temperature, the first anti-frozen mode is directly opened.
In the preferred embodiment of the above method, " outdoor environment temperature and the inflow temperature are based on, is judged
Whether open anti-frozen mode " the step of specifically include：When the inflow temperature is less than default anti-freezing temperature value, and it is described
When outdoor environment temperature is less than the second preset temperature, the second anti-frozen mode is opened.
In the preferred embodiment of the above method, under the second anti-frozen mode, start the compressor；It is and described
Method also comprises the following steps：The inflow temperature of water circulation system is obtained again；When the inflow temperature is pre- less than or equal to the 3rd
If during temperature, maintain the second anti-frozen mode；When the inflow temperature is more than three preset temperatures, described second is exited
Anti- frozen mode.
In the preferred embodiment of the above method, " outdoor environment temperature and the inflow temperature are based on, is judged
Whether open anti-frozen mode " the step of also include：When the inflow temperature is more than or equal to default anti-freezing temperature value, than
The inflow temperature and default anti-freezing temperature value and N1Sum；If the inflow temperature is less than default anti-freezing temperature
Angle value and N1Sum, and when the outdoor environment temperature is less than the second preset temperature, open the first anti-frozen mode；Wherein, institute
State N1For constant.
In the preferred embodiment of the above method, under the first anti-frozen mode, start the water pump；And the side
Method also comprises the following steps：Obtain run time of the water pump under the first anti-frozen mode；Sentenced according to the run time
It is disconnected whether to exit the first anti-frozen mode.
In the preferred embodiment of the above method, " judged whether to exit the first anti-freezing mould according to the run time
The step of formula ", specifically includes：When the run time of the water pump is more than or equal to preset time, then the first anti-frozen mode is exited；
When the run time of the water pump is less than preset time, then heating mode starting-up signal is detected, if detecting the heating mould
Formula starting-up signal, then exit the described first anti-frozen mode；If be not detected by, obtain water circulation system again enters water temperature
Degree, and judged whether according to the inflow temperature to exit the first anti-frozen mode.
In the preferred embodiment of the above method, " judged whether to exit the first anti-freezing mould according to the inflow temperature
The step of formula ", specifically includes：When the inflow temperature is more than or equal to default anti-freezing temperature value and N2Sum, and the outdoor
When environment temperature is more than or equal to four preset temperatures, then the first anti-frozen mode is exited；Otherwise, the first anti-freezing mould is maintained
Formula；Wherein, the N2For constant.
In the preferred embodiment of the above method, first preset temperature is 0 DEG C；And/or described second is pre-
If temperature is 10 DEG C；And/or the 3rd preset temperature is 25 DEG C；And/or the 4th preset temperature is 2 DEG C；
And/or the preset time is the arbitrary value in the range of 5min-20min；And/or the default anti-cryogenic temperature
It is worth for the arbitrary value in the range of 0 DEG C -9 DEG C；And/or the N1For 2；And/or the N2For 3.
In the inventive solutions, the inflow temperature comprehensive descision based on outdoor environment temperature and water circulation system is
It is no to open anti-frozen mode, it is precisely controlled with realizing that source pump is cryoprotective, so as to effectively preventing heat exchanger from occurring freezing
Caused damage phenomenon.Also, under anti-frozen mode, the present invention also passes through the run time of water pump, heating mode start letter
Number, inflow temperature and outdoor environment temperature accurately judge that the opportunity for exiting anti-frozen mode.So, the present invention not only
It can accurately judge to enter cryoprotective opportunity, additionally it is possible to which accurate judgement exits cryoprotective opportunity, it is achieved thereby that to heat
The cryoprotective accurate control of pump assembly.
Brief description of the drawings
Fig. 1 is the key step flow chart of the anti-refrigeration control method of source pump of the present invention；
Fig. 2 is the principle schematic diagram of source pump；
Fig. 3 is the detailed step flow chart of the anti-refrigeration control method of source pump of the present invention.
Embodiment
The preferred embodiment of the present invention described with reference to the accompanying drawings.It will be apparent to a skilled person that this
A little embodiments are used only for explaining the technical principle of the present invention, it is not intended that limit the scope of the invention.For example, although
In the application according to particular order describe the present invention method each step, but these be not sequentially it is restricted,
On the premise of without departing from the general principle of the present invention, those skilled in the art can perform the step in a different order
Suddenly.
As shown in figure 1, the anti-refrigeration control method of source pump of the present invention comprises the following steps：S110, obtain outdoor ring
Border temperature；S120, the inflow temperature according to outdoor environment temperature, optionally acquisition water circulation system；S130, based on outdoor ring
Border temperature and inflow temperature, judge whether to open anti-frozen mode.
With existing anti-refrigeration control method (judge according only to return water temperature, when return water temperature is less than default protection value,
Carry out anti-refrigeration operation) to compare, anti-refrigeration control method of the invention is integrated based on outdoor environment temperature and inflow temperature
Judge, if anti-frozen mode is opened, avoids existing erroneous judgement situation when judging according only to " return water temperature ", it is anti-cold to realize
What is frozen is precisely controlled, and so as to effectively prevent because ambient temperature is less than freezing temperature point, and causes heat exchanger that knot occurs
The phenomenon of ice, play the purpose of protection heat exchanger.
Preferably, before step S110 is carried out, the compressor of source pump and the water circulation system are detected first
Whether water pump is in stopped status, if it is, obtaining outdoor environment temperature.Due under heating mode in the winter time, air conditioner
Standby mode is in after reaching heating temperature, compressor and water pump are in stopped status.Now, water system can not be followed normally
Ring, there is water inside heat exchanger but flowed without water, when ambient temperature is less than freezing temperature point, knot occurs in heat exchanger
Ice.Therefore, when compressor and water pump are in stopped status, above-mentioned steps S110-S130 is performed, it is anti-to judge whether to open
Frozen mode.Describe the embodiment of the present invention in detail with reference to Fig. 2 and Fig. 3.
With reference first to Fig. 2, Fig. 2 is the principle schematic diagram of source pump.As shown in Fig. 2 the direction of arrow is heating mould
The flow direction of refrigerant under formula.The high temperature and high pressure gas discharged from compressor direction of arrow along figure flows to indoor heat exchange
Device, indoors in heat exchanger, after gaseous refrigerant heat release liquefaction is the refrigerant of liquid, continuation is flowed in the direction of the arrow, successively
Enter outdoor heat exchanger after fluid reservoir, device for drying and filtering, expansion valve.In outdoor heat exchanger, liquid refrigerant is in heat absorption vapour
After turning to gaseous state, continuation is flowed in the direction of the arrow, is sucked by compressor, starts subsequent cycle.The heat pump shown in the present embodiment
Set structure is not the limit to the method for the present invention in structure merely to the anti-refrigeration control method of the explanation present invention
Fixed, the change in the other structures that those skilled in the art make to source pump does not affect the anti-freezing controlling party of the present invention
The implementation of method.
With continued reference to Fig. 2, indoor heat exchanger is connected with water circulation system, the T in Fig. 2ewiRepresent the water inlet of water circulation system
Temperature, TewoRepresent the leaving water temperature of water circulation system.The refrigerant got in the water and indoor heat exchanger of heat exchanger is carried out
Continued cycling through after heat exchange (heating of water absorption refrigeration agent liberated heat), so as to which the air stream entered in air conditioner is changed into hot empty
Interior is passed back to after gas, and then realizes the regulation to indoor environment temperature.
Reference picture 3, Fig. 3 are the detailed step flow charts of the anti-refrigeration control method of source pump of the present invention.Such as Fig. 3 institutes
Show, in a heating mode, when compressor and water pump are in stopped status, step S210 is first carried out, obtains outdoor environment temperature
Spend Ta.Subsequently into step S220, compare outdoor environment temperature Ta and the first preset temperature.In the present embodiment, first is default
Temperature is 0 DEG C, if 0 DEG C of Ta ＜, into step S260, opens the first anti-frozen mode, makes water pump operation；If Ta >=0
DEG C, then into step S230, the inflow temperature Tewi of acquisition water circulation system.Subsequently into step S240, compare inflow temperature
Tewi and default anti-freezing temperature value.Wherein, default anti-freezing temperature value is arbitrary value between 0 DEG C -9 DEG C, in this implementation
In example, default anti-freezing temperature value is 4 DEG C.If Tew is less than default anti-freezing temperature value, and Ta is less than the second default temperature
Degree (in the present embodiment, the second preset temperature is 10 DEG C), then into step S270, the second anti-frozen mode of unlatching, make compression
Machine is run；If Tewi is not less than the second preset temperature not less than default anti-freezing temperature value or Ta, into step
S250, compare inflow temperature Tewi and default anti-freezing temperature value and N1Sum (N in the present embodiment1For 2), that is to say, that
When Tewi is not less than 4 DEG C, then judge whether Tewi is less than 4 DEG C+2 DEG C, that is, judge whether Tewi is less than 6 DEG C, if Tewi is not
Less than 6 DEG C, then anti-frozen mode is not started；If 6 DEG C of Tewi ＜, and 10 DEG C of Ta ＜, then into step S260, unlatching the firstth
Anti- frozen mode, makes water pump operation.
As described above, the anti-refrigeration control method of the present invention is judged whether out based on outdoor environment temperature and inflow temperature
Open anti-frozen mode.Specifically, when outdoor environment temperature is too low, directly initiate water pump and carry out anti-freezing；When outdoor environment temperature
When degree is higher, such as 0 DEG C of 10 DEG C of ＜ Ta ＜, compare inflow temperature.If inflow temperature is less than default anti-cryogenic temperature, illustrate into
Coolant-temperature gage is too low, now starts compressor and carrys out anti-freezing；If inflow temperature is higher than default anti-cryogenic temperature, and less than default
Anti- freezing temperature value+2, now start water pump carry out anti-freezing；If inflow temperature is higher, such as it is higher than default anti-cryogenic temperature
Value+2, then illustrate not needing anti-freezing now.The anti-refrigeration control method of the present invention can be precisely controlled into anti-freezing
Opportunity, to prevent heat exchanger from icing phenomenon occur.
With continued reference to Fig. 3, the step of anti-refrigeration control method of the invention also comprises determining whether to exit anti-frozen mode.
Specifically, in the case of the first anti-frozen mode is opened, that is, start water pump it is cryoprotective during, perform step
S261, the run time t for obtaining water pump.Subsequently into step S262, compare time t and preset time.Wherein, preset time is
Arbitrary value between 5min-20min, in the present embodiment, preset time 10min.If t >=10min, it is directly entered step
S266, the first anti-frozen mode is exited, that is, switched off the pump；If t ＜ 10min, opened into step S263, detection heating mode
Machine signal.If detecting heating mode starting-up signal, into step S266, the first anti-frozen mode is exited；If do not examine
Heating mode starting-up signal is measured, then the inflow temperature Tewi of water circulation system is obtained into step S264, again.
Subsequently into step S265, compare Tewi and default anti-freezing temperature value and N2Sum (in the present embodiment, N2
For size 3), and outdoor environment temperature Ta.If Tewi >=default anti-freezing temperature value+N2, and Ta >=2 DEG C the (the 4th
Preset temperature), then into step S266, exit the first anti-frozen mode；Otherwise, i.e. Tewi ＜ it is default it is anti-freezing temperature value+
N2, or 2 DEG C of Ta ＜, then maintain anti-frozen mode.
In the case of the second anti-frozen mode is opened, that is, start compressor it is cryoprotective during, perform step
S271, the inflow temperature Tewi for obtaining water circulation system again.Subsequently into step S272, compare inflow temperature Tewi and the 3rd
Preset temperature.Wherein, in the present embodiment, the 3rd preset temperature is 25 DEG C.If 25 DEG C of Tewi ＞, into step S273,
Exit the second anti-frozen mode, i.e. close compressor；If Tewi≤25 DEG C, the second anti-frozen mode is maintained.
As described above, in above-mentioned steps S261-S266, and step S271-S273, when being based respectively on the operation of water pump
Between, heating mode starting-up signal, inflow temperature and outdoor environment temperature accurately judge that the opportunity for exiting anti-frozen mode.This
Sample one, the present invention can not only accurately judge to enter cryoprotective opportunity, additionally it is possible to when accurate judgement exits cryoprotective
Machine, it is achieved thereby that accurate control cryoprotective to source pump.
In summary, anti-refrigeration control method of the invention judges whether to perform relative to existing merely with " return water temperature "
The mode of anti-refrigeration operation is more accurate.It is the first preset temperature, the second preset temperature, the 3rd preset temperature in above-mentioned, the 4th pre-
If temperature, preset time, default anti-freezing temperature value, N1And N2Value be not limited to the value provided in above-described embodiment, ability
Field technique personnel can also select suitable value according to practical application situation, and these are without departure from protection scope of the present invention.
So far, combined preferred embodiment shown in the drawings describes technical scheme, still, this area
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these embodiments.Without departing from this
On the premise of the principle of invention, those skilled in the art can make equivalent change or replacement to correlation technique feature, these
Technical scheme after changing or replacing it is fallen within protection scope of the present invention.
Claims (10)
1. a kind of anti-refrigeration control method of source pump, it is characterised in that methods described comprises the following steps：
Obtain outdoor environment temperature；
According to the inflow temperature of the outdoor environment temperature, optionally acquisition water circulation system；
Based on the outdoor environment temperature and the inflow temperature, judge whether to open anti-frozen mode.
2. according to the method for claim 1, it is characterised in that described before the step of " acquisition outdoor environment temperature "
Method includes：
In a heating mode, detect the compressor of the source pump and whether the water pump of the water circulation system is in shutting down
State；
If it is, obtain outdoor environment temperature.
3. according to the method for claim 2, it is characterised in that " according to the outdoor environment temperature, optionally obtain water
The step of inflow temperature of the circulatory system ", includes：
When the outdoor environment temperature is more than or equal to the first preset temperature, the inflow temperature of water circulation system is obtained；
When the outdoor environment temperature is less than the first preset temperature, the first anti-frozen mode is directly opened.
4. according to the method for claim 3, it is characterised in that " based on the outdoor environment temperature and it is described enter water temperature
Degree, judge whether to open anti-frozen mode " the step of specifically include：
When the inflow temperature is less than default anti-freezing temperature value, and the outdoor environment temperature is less than the second preset temperature
When, open the second anti-frozen mode.
5. according to the method for claim 4, it is characterised in that under the second anti-frozen mode, start the compressor；And
And methods described also comprises the following steps：
The inflow temperature of water circulation system is obtained again；
When the inflow temperature is less than or equal to three preset temperatures, the second anti-frozen mode is maintained；
When the inflow temperature is more than three preset temperatures, the described second anti-frozen mode is exited.
6. according to the method for claim 4, it is characterised in that " based on the outdoor environment temperature and it is described enter water temperature
Degree, judge whether to open anti-frozen mode " the step of also include：
When the inflow temperature is more than or equal to default anti-freezing temperature value, the inflow temperature and default anti-freezing
Temperature value and N1Sum；
If the inflow temperature is less than default anti-freezing temperature value and N1Sum, and the outdoor environment temperature is less than second
During preset temperature, the first anti-frozen mode is opened；
Wherein, the N1For constant.
7. according to the method for claim 6, it is characterised in that under the first anti-frozen mode, start the water pump；And
Methods described also comprises the following steps：
Obtain run time of the water pump under the first anti-frozen mode；
Judged whether to exit the first anti-frozen mode according to the run time.
8. according to the method for claim 7, it is characterised in that " judge whether that exiting first prevents according to the run time
The step of frozen mode ", specifically includes：
When the run time of the water pump is more than or equal to preset time, then the first anti-frozen mode is exited；
When the run time of the water pump is less than preset time, then heating mode starting-up signal is detected, if detecting the system
Heat pattern starting-up signal, then exit the described first anti-frozen mode；If be not detected by, entering for water circulation system is obtained again
Coolant-temperature gage, and judged whether according to the inflow temperature to exit the first anti-frozen mode.
9. according to the method for claim 8, it is characterised in that " judge whether that exiting first prevents according to the inflow temperature
The step of frozen mode ", specifically includes：
When the inflow temperature is more than or equal to default anti-freezing temperature value and N2Sum, and the outdoor environment temperature be more than etc.
When four preset temperatures, then the first anti-frozen mode is exited；Otherwise, the first anti-frozen mode is maintained；
Wherein, the N2For constant.
10. the method according to any one of claim 3 to 9, it is characterised in that first preset temperature is 0 DEG C；And
And/or person
Second preset temperature is 10 DEG C；And/or
3rd preset temperature is 25 DEG C；And/or
4th preset temperature is 2 DEG C；And/or
The preset time is the arbitrary value in the range of 5min-20min；And/or
The default anti-freezing temperature value is the arbitrary value in the range of 0 DEG C -9 DEG C；And/or
The N1For 2；And/or
The N2For 3.
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| CN109297220A (en) * | 2018-10-11 | 2019-02-01 | 珠海格力电器股份有限公司 | Antifreezing control method and device, computer readable storage medium |
| CN109405308A (en) * | 2018-10-29 | 2019-03-01 | 珠海格力电器股份有限公司 | Pump water system and its antifreezing control method and device, storage medium |
| CN109506319A (en) * | 2018-11-21 | 2019-03-22 | 珠海格力电器股份有限公司 | Heating machine and its automatic freezing-protective control method |
| CN111189173A (en) * | 2018-11-14 | 2020-05-22 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN112649584A (en) * | 2020-12-18 | 2021-04-13 | 联想(北京)有限公司 | Liquid state detection method and device |
| CN113654194A (en) * | 2021-08-12 | 2021-11-16 | 珠海格力电器股份有限公司 | Anti-freezing control device and method for heat pump unit and heat pump unit |
| CN114963443A (en) * | 2022-05-05 | 2022-08-30 | 漳州科华电气技术有限公司 | Method for controlling freezing prevention of water contact system of air conditioning unit and storage medium |
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| CN109506319A (en) * | 2018-11-21 | 2019-03-22 | 珠海格力电器股份有限公司 | Heating machine and its automatic freezing-protective control method |
| CN112649584A (en) * | 2020-12-18 | 2021-04-13 | 联想(北京)有限公司 | Liquid state detection method and device |
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| CN114963443A (en) * | 2022-05-05 | 2022-08-30 | 漳州科华电气技术有限公司 | Method for controlling freezing prevention of water contact system of air conditioning unit and storage medium |
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Application publication date: 20180223 |