CN108019972A - Air source heat pump unit and defrosting control method and device thereof - Google Patents
Air source heat pump unit and defrosting control method and device thereof Download PDFInfo
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- CN108019972A CN108019972A CN201711262006.6A CN201711262006A CN108019972A CN 108019972 A CN108019972 A CN 108019972A CN 201711262006 A CN201711262006 A CN 201711262006A CN 108019972 A CN108019972 A CN 108019972A
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- 238000010257 thawing Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000001514 detection method Methods 0.000 claims abstract description 34
- 238000012545 processing Methods 0.000 claims description 56
- 239000007788 liquid Substances 0.000 claims description 19
- 238000012360 testing method Methods 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000001704 evaporation Methods 0.000 claims description 12
- 238000005057 refrigeration Methods 0.000 claims description 11
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 239000003507 refrigerant Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- 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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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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
-
- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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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
- F25B2600/00—Control issues
- F25B2600/01—Timing
-
- 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
- F25B2700/17—Speeds
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The disclosure relates to an air source heat pump unit and a defrosting control method and device thereof, wherein the method comprises the following steps: determining that an air source heat pump unit meets a defrosting condition, wherein the defrosting condition is used for representing that the air source heat pump unit needs to be subjected to defrosting treatment; detecting whether the outdoor environment temperature meets a first preset temperature range or not to obtain a detection result; determining a target defrosting control mode according to the detection result; and performing defrosting treatment on the air source heat pump unit based on the target defrosting control mode. According to the embodiment of the invention, the appropriate defrosting treatment mode can be selected based on the outdoor environment temperature, so that the energy consumption in the defrosting treatment is reduced, and the utilization rate of energy is improved.
Description
Technical field
This disclosure relates to technical field of heat exchange, more particularly to a kind of net for air-source heat pump units and its defrosting control method and
Device.
Background technology
In northern area, since environment temperature is relatively low, the evaporation of net for air-source heat pump units system unit in a heating mode
Temperature is relatively low.When evaporating temperature drops to certain value, the vapor in air condenses into frost when running into outdoor heat exchanger coil pipe, and
Outdoor heat exchanger surface is attached to, heat exchange is hindered, causes set heat exchange amount small, seriously affect the normal work of unit.
In correlation technique, the defrost mode generally used is by controlling four-way valve to commutate, specifically, if judging to meet
Defrost condition, then carry out four-way valve commutation, to change refrigerant flow direction immediately.However, the method for this single solution for diverse problems can disappear
Consume the more energy.
The content of the invention
For problem present in correlation technique, present disclose provides a kind of net for air-source heat pump units and its defrosting control side
Method and device.
According to the first aspect of the embodiment of the present disclosure, there is provided a kind of defrosting control method of net for air-source heat pump units, it is described
Method includes：Determine that net for air-source heat pump units meets defrost condition, wherein, the defrost condition is used to characterize the air-source heat
Pump assembly need to carry out defrost processing；Whether detection outdoor environment temperature meets the first preset temperature range, obtains testing result；Root
Target defrost control model is determined according to the testing result；Based on the target defrost control model to the air source heat pump machine
Group performs defrost processing.
Optionally, whether the detection outdoor environment temperature meets the first preset temperature range, including：Detect the outdoor
Whether environment temperature reaches the first temperature threshold.
Optionally, it is described that target defrost control model is determined according to the testing result, including：In the outdoor environment temperature
In the case that degree reaches first temperature threshold, in the first pattern as the target defrost control model, first mould
Formula is to carry out the control model of defrost processing based on improving evaporating temperature；And/or it is not up to institute in the outdoor environment temperature
In the case of stating the first temperature threshold, in a second mode as the target defrost control model, the second mode is in order to control
The net for air-source heat pump units is converted to the control model of refrigeration mode by heating mode.
Optionally, it is described to be based on the mesh in the case where the outdoor environment temperature reaches first temperature threshold
Mark defrosting control pattern and defrost processing is performed to the net for air-source heat pump units, including：Obtain the net for air-source heat pump units
At least one following parameter：Compressor frequency, rotation speed of fan, expansion valve opening；The parameter is adjusted to target sizes, with to institute
State net for air-source heat pump units and perform defrost processing.
Optionally, the net for air-source heat pump units is held using the first mode as the target defrost control model
In the case that row defrost is handled, the method further includes：According to preset period of time, whether detection defrost temperature meets that second is pre-
If temperature range；If it is not, then using the first mode as the target defrost control model, to the net for air-source heat pump units
Perform defrost processing.
Optionally, whether the detection defrost temperature meets the second preset temperature range, including：Detect the defrost temperature
Whether second temperature threshold value is reached.
Optionally, in the case where the defrost temperature meets second preset temperature range, the method further includes：
Detect whether the net for air-source heat pump units meets defrost exit criteria, wherein, the defrost exit criteria is used to characterize described
Net for air-source heat pump units is not required to carry out defrost processing；If so, then stop performing defrost processing；If it is not, then with the first mode
Defrost processing is performed to the net for air-source heat pump units as the target defrost control model.
Optionally, whether the detection outdoor environment temperature meets the first preset temperature range, including：Pass through the air
The first temperature sensing package set outside the outdoor heat exchanger of source heat pump unit, detects the outdoor environment temperature；Judge the outdoor
Whether environment temperature meets first preset temperature range.
Optionally, whether the detection defrost temperature meets the second preset temperature range, including：Pass through air-source heat
The second temperature sensing package set in the liquid pipe of pump assembly, detects the defrost temperature, wherein, the liquid pipe is to enter the air-source
The liquid pipe of the coil pipe of the outdoor heat exchanger of heat pump unit；Judge whether the defrost temperature meets the second preset temperature model
Enclose.
According to the second aspect of the disclosure, a kind of defrosting control device of net for air-source heat pump units is also provided, including：First
Determination unit, for determining that net for air-source heat pump units meets defrost condition, wherein, the defrost condition is used to characterize the air
Source heat pump unit need to carry out defrost processing；Detection unit, for detecting whether outdoor environment temperature meets the first preset temperature model
Enclose, obtain testing result；Second determination unit, for determining target defrost control model according to the testing result；At defrost
Unit is managed, for performing defrost processing to the net for air-source heat pump units based on the target defrost control model.
According to the third aspect of the disclosure, a kind of net for air-source heat pump units is also provided, including described in disclosure second aspect
Defrosting control device.
The technical scheme provided by this disclosed embodiment can include the following benefits：The embodiment of the present disclosure is determining sky
When air supply heat pump unit meets defrost condition, whether detection outdoor environment temperature meets the first preset temperature range, and according to inspection
Survey result to determine to carry out the target defrost control model of defrost, to perform at defrost net for air-source heat pump units based on the pattern
Reason, can also select suitable defrost tupe according to outdoor environment temperature size, compared to imposing uniformity without examining individual cases in correlation technique
Formula reduces the energy consumption in defrost processing by the way of four-way valve commutation, improves the utilization rate of the energy.
It should be appreciated that the general description and following detailed description of the above are only exemplary and explanatory, not
The disclosure can be limited.
Brief description of the drawings
Attached drawing herein is merged in specification and forms the part of this specification, shows the implementation for meeting the present invention
Example, and for explaining the principle of the present invention together with specification.
Fig. 1 is a kind of signal of the defrosting control method of net for air-source heat pump units according to an exemplary embodiment
Figure；
Fig. 2 is a kind of signal of the defrosting control method of the net for air-source heat pump units shown according to another exemplary embodiment
Figure；
Fig. 3 is a kind of structure diagram of net for air-source heat pump units according to an exemplary embodiment；
Fig. 4 is a kind of signal of the defrosting control method of the net for air-source heat pump units shown according to another exemplary embodiment
Figure；
Fig. 5 is a kind of structural frames of the defrosting control device of net for air-source heat pump units according to an exemplary embodiment
Figure；
Fig. 6 is a kind of structure of the defrosting control device of the net for air-source heat pump units shown according to another exemplary embodiment
Block diagram.
Pass through above-mentioned attached drawing, it has been shown that the clear and definite embodiment of the disclosure, will hereinafter be described in more detail.These attached drawings
It is not intended to limit the scope of disclosure design by any mode with word description, but is by reference to specific embodiment
Those skilled in the art illustrate the concept of the disclosure.
Embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During attached drawing, unless otherwise indicated, the same numbers in different attached drawings represent the same or similar key element.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.On the contrary, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects being described in detail in claims, of the invention.
Fig. 1 is a kind of signal of the defrosting control method of net for air-source heat pump units according to an exemplary embodiment
Figure.As shown in Figure 1, this method includes：
Step S10, determines that net for air-source heat pump units meets defrost condition, wherein, the defrost condition is used to characterize described
Net for air-source heat pump units need to carry out defrost processing；
Whether step S12, detection outdoor environment temperature meet the first preset temperature range, obtain testing result；
Step S14, target defrost control model is determined according to the testing result；
Step S16, the net for air-source heat pump units is performed defrost processing based on the target defrost control model.
In this embodiment, when outdoor environment temperature is relatively low, the evaporating temperature of net for air-source heat pump units under heating mode
Relatively low, when evaporating temperature drops to certain value, the vapor in air condenses into frost when running into outdoor heat exchanger coil pipe, and according to
Outdoor heat exchanger surface is attached to, so as to hinder heat exchange, causes set heat exchange amount small so that unit can not work normally, at this time
Need to carry out defrost processing to net for air-source heat pump units, that is, net for air-source heat pump units meets described in the present embodiment at this time
Defrost condition.
In a kind of optional embodiment, can by setting sensor on outdoor heat exchanger coil pipe, such as, temperature
Sensor (being used to detect coil temperature), air volume test sensor (being used to detect air output) etc., to determine air source heat pump machine
Whether group meets defrost condition.It should be noted that whether net for air-source heat pump units meets defrost condition in the embodiment of the present disclosure
Determination mode, the any-mode in correlation technique can be used, the disclosure be not construed as limiting this.
In this embodiment, in the case where net for air-source heat pump units meets defrost condition, outdoor environment temperature is detected.
In a kind of optional embodiment, can by outdoor environment set temperature sensor detect outdoor environment temperature.It is excellent
Choosing, at least one temperature sensing package can be set outside the outdoor heat exchanger of net for air-source heat pump units, to detect outdoor environment temperature
Degree.For example, multiple temperature sensing packages can be distributed, the average value for the temperature that multiple temperature sensing packages are detected is as outdoor environment temperature
Measured value.
In a kind of optional embodiment, above-mentioned first preset temperature range is drawn according to lot of experimental data measurement
Reference value.For example, different size of temperature threshold is set according to predetermined gradient, such as, -20 DEG C, -19 DEG C, -18 DEG C ... 9
DEG C, 10 DEG C, for each temperature threshold, it is detected respectively when meeting defrost condition, using a variety of different defrosting control patterns
When energy consumption, according to energy input size, determine defrosting control pattern optimal under every kind of temperature threshold.Based on this, difference is determined
The defrosting control pattern of corresponding minimal energy loss in temperature range.
In this embodiment, defrosting control pattern can include any mode for being capable of defrost, for example, being made by switching
Heat/refrigeration mode carrys out the mode of defrost.
In addition, the embodiment of the present disclosure also proposed a kind of compressor frequency, wind turbine by regulated air source heat pump unit
Any parameter such as rotating speed, expansion valve opening or many kinds of parameters, carry out the mode of defrost.Which will be described below.
In a kind of optional embodiment, the corresponding optimal defrosting control of different temperatures scope can be pre-set
The correspondence of pattern, and by correspondence storage in the database.After outdoor environment temperature is detected, by inquiring about number
According to the correspondence in storehouse, to determine the optimal defrost control model corresponding to the outdoor environment temperature (that is, target defrost control
Molding formula).
In the embodiment of the present disclosure, when definite net for air-source heat pump units meets defrost condition, detection outdoor environment temperature is
It is no satisfaction the first preset temperature range, and according to testing result determine carry out defrost target defrost control model, with based on this
Pattern performs net for air-source heat pump units defrost processing, can also be selected according to outdoor environment temperature size at suitable defrost
Reason mode, compared to single solution for diverse problems formula in correlation technique by the way of four-way valve commutation, the energy reduced in defrost processing disappears
Consumption, improves the utilization rate of the energy.
Fig. 2 is a kind of signal of the defrosting control method of the net for air-source heat pump units shown according to another exemplary embodiment
Figure.As shown in Fig. 2, this method includes above-mentioned steps S10 to step S16, wherein, step S12 can also include：
Whether step S20, detection outdoor environment temperature reach the first temperature threshold.
In this embodiment, drawn by lot of experimental data measurement when outdoor environment temperature is relatively low and higher, can be with
Different defrosting control modes is respectively adopted, so that energy consumption during defrosting processing is lower.Optionally, different temperatures can be tested
The minimum defrosting control mode of lower corresponding energy input, first temperature threshold is determined with this.
In a kind of optional embodiment, according to the testing result determine target defrost control model can by with
Lower step is realized：
In the case where the outdoor environment temperature reaches first temperature threshold, in the first pattern as the target
Defrosting control pattern, the first mode are to carry out the control model of defrost processing based on improving evaporating temperature；And/or
In the case where the outdoor environment temperature is not up to first temperature threshold, in a second mode as the mesh
Defrosting control pattern is marked, the net for air-source heat pump units is converted to refrigeration mode to the second mode by heating mode in order to control
Control model.
In this embodiment, interval division is carried out to outdoor environment temperature based on the first temperature threshold, in outdoor environment temperature
It is preferential to be performed by the way of heating to refrigeration mode conversion when spending relatively low, to shorten the defrost cycle；Outdoor environment temperature compared with
Gao Shi, preferentially carries out defrosting processing by the way of evaporating temperature is improved, and can reach the saving energy, improves energy utilization rate
Effect.
In a kind of optional embodiment, in the case where outdoor environment temperature reaches first temperature threshold, base
Defrost processing is performed to net for air-source heat pump units in the target defrost control model to realize by following steps：
Obtain at least one following parameter of the net for air-source heat pump units：Compressor frequency, rotation speed of fan, expansion valve are opened
Degree；The parameter is adjusted to target sizes, to perform defrost processing to the net for air-source heat pump units.
It is in this embodiment it is possible to warm to improve evaporation by adjusting compressor frequency, rotation speed of fan, expansion valve opening
Degree, achievees the purpose that defrost.For example, rotation speed of fan can be controlled to reduce compressor frequency to maximum to predeterminated frequency f, adjust
Throttle valve opening is to default aperture K.
Wherein, in a kind of optional embodiment, compressor frequency, rotation speed of fan, expansion valve opening regulated value can
To be configured based on the indoor and outdoor surroundings temperature difference.Alternatively, can also be by largely testing acquisition reference data.For example, it is directed to
Frosting situation at a temperature of different indoor and outdoor surroundings, using different size of compressor frequency, rotation speed of fan, expansion valve opening
(or combination of the two or three) carries out defrosting experiment, to obtain the corresponding defrosting efficiency highest of three and/or defrosting energy
Consume minimum parameter value.
In a kind of optional embodiment, hot to air-source using the first mode as target defrost control model
In the case that pump assembly performs defrost processing, the method can also include：
According to preset period of time, whether detection defrost temperature meets the second preset temperature range；If it is not, then with described
One pattern performs the net for air-source heat pump units defrost processing as the target defrost control model.
In this embodiment it is possible to whether periodic detection defrost temperature is in the second preset temperature range, if be not in
Second preset temperature range, then can continue to execute defrost processing.
In a kind of optional embodiment, the second preset temperature range can be based on substantial amounts of experiment and obtain.For example, can
In the processing procedure that defrosts, to monitor defrost temperature, to determine that what defrost temperature can terminate defrost in the range of.
Wherein it is possible to by the liquid pipe of net for air-source heat pump units set temperature sensor detect defrost temperature.Its
In, the liquid pipe is the liquid pipe into the coil pipe of the outdoor heat exchanger of net for air-source heat pump units.Preferably, can be in air-source heat
Temperature sensing package is set in the liquid pipe of pump assembly, to detect defrost temperature.
In a kind of optional embodiment, detection defrost temperature whether meet the second preset temperature range can by with
Lower step is realized：Detect whether the defrost temperature reaches second temperature threshold value.
In this embodiment, defrost temperature is after certain temperature threshold value is reached, it is believed that its success defrost.Wherein, should
Second temperature threshold value can be based on substantial amounts of experiment and obtain.For example, defrost temperature can be monitored in the processing procedure that defrosts, with
Determine that defrost temperature can terminate defrost when more than what temperature.
In a kind of optional embodiment, in the case where defrost temperature meets the second preset temperature range, this method
It can also include：
Detect whether the net for air-source heat pump units meets defrost exit criteria, wherein, the defrost exit criteria is used for
The net for air-source heat pump units is characterized to be not required to carry out defrost processing；If so, then stop performing defrost processing；If it is not, then with described
First mode performs the net for air-source heat pump units defrost processing as the target defrost control model.
In this embodiment, whether can stop according to certain time cycle monitoring net for air-source heat pump units at defrost
Reason, in the case of without defrosting, to stop defrosting operation in time, to save energy consumption.
Fig. 3 is a kind of structure diagram of net for air-source heat pump units according to an exemplary embodiment, the air-source
Heat pump unit can apply the defrosting control method of above-mentioned net for air-source heat pump units.As shown in figure 3, the net for air-source heat pump units
Including：
Indoor heat exchanger 300；
Four-way valve 302, is connected with indoor heat exchanger 300.Commutated by adjusting four-way valve 302, thus it is possible to vary refrigerant
Flow direction, that is, net for air-source heat pump units is switched to refrigeration mode by heating mode；
Compressor 304, is connected with four-way valve 302；
Outdoor heat exchanger 310, one end are connected with four-way valve 302, and the other end passes through throttle valve 306 and indoor heat exchanger
300 are connected.
Wherein, in a heating mode, gas of the compressor by refrigerant compression into high temperature and pressure, by four-way valve into entering the room
Interior heat exchanger condensation, refrigerant contact the heat to refrigerating medium or directly exchange heat with room air, come out from indoor heat exchanger
Highly pressurised liquid enters throttle valve decompression and becomes low pressure liquid, by outdoor heat exchanger, exchanges heat with external environment condition, becomes low temperature
Low-pressure gas returns to compressor；In cooling mode, gas of the compressor by refrigerant compression into high temperature and pressure, passes through four-way valve
Into outdoor heat exchanger, carry out heat exchange with external environment condition and be condensed into highly pressurised liquid, throttle subsequently into throttle valve into low pressure liquid
Heat exchanger is got in, the heat of refrigerant suction refrigerating medium or the thermal change of room air return to compression into low temperature low pressure gas
Machine.
The outside of outdoor heat exchanger 310 is additionally provided with environment temperature sensing package 308, for detecting outdoor environment temperature；Into entering the room
In the liquid pipe of the coil pipe of external heat exchanger 310, defrost temperature temperature sensing package 312 is additionally provided with, for detecting defrost temperature.
In this embodiment, when definite net for air-source heat pump units meets defrost condition, if environment temperature sensing package 308 detects
To temperature reach the first temperature threshold, then adjust compressor 304 frequency, rotation speed of fan, expansion valve (throttle valve) aperture and change
Frost；If the temperature that environment temperature sensing package 308 detects is not up to the first temperature threshold, adjusts four-way valve 302 and commutate, will system
Heat pattern is switched to refrigeration mode.The unit uses the unit of four-way valve commutation compared to single solution for diverse problems formula in correlation technique, reduces
Energy consumption in defrost processing, improves the utilization rate of the energy.
Fig. 4 is a kind of signal of the defrosting control method of the net for air-source heat pump units shown according to another exemplary embodiment
Figure.As shown in figure 4, this method includes：
Step S400, control net for air-source heat pump units are in heating mode.
Step S402, judges whether net for air-source heat pump units meets to enter defrost condition (namely above-mentioned defrost condition).
If so, then perform step S404；If it is not, then perform step S400.
When unit is run in a heating mode, it can detect whether unit meets to enter defrost condition at the same time.If it is not, then machine
The normal heating operation of group.
Step S404, detection environment temperature sensing package temperature Tw.
Wherein, Tw namely above-mentioned outdoor environment temperature.Environment temperature sensing package is arranged in outside outdoor heat exchanger, for monitoring
Environment temperature Tw.
Step S406, judges whether Tw is greater than or equal to T01.If so, then perform step S408；If it is not, then perform step
S418。
Wherein, T01 namely the first above-mentioned temperature threshold.
Step S408, for control rotation speed of fan to maximum, adjusting compressor frequency is predeterminated frequency f, and adjusts throttle valve and open
Spend to preset aperture K.
After step S410, the N2 time, defrost temperature Te is detected.
Wherein, time N2 can be according to the parameter setting such as outdoor environment temperature or the indoor and outdoor surroundings temperature difference, the disclosure pair
This is not especially limited.Another temperature sensing package is arranged in into the liquid pipe of heat exchanger coils, for monitoring defrost temperature Te.
Step S412, judges whether Te is greater than or equal to T02.If so, then perform step S414；If it is not, then perform step
S408。
Wherein, T02 namely above-mentioned second temperature threshold value.
After step S414, the N3 time, judge whether to meet the second defrost exit criteria.If so, then perform step S416；If
It is no, then perform step S408.
Wherein, time N3 can be according to the parameter setting such as outdoor environment temperature or the indoor and outdoor surroundings temperature difference, the disclosure pair
This is not especially limited.
Step S416, exits defrost pattern.
After exiting defrost pattern, unit switches back into normal heating mode and continues to run with.
Step S418, switches refrigeration mode defrost.
I.e. four-way valve commutates, and unit is switched to refrigeration mode by heating mode.
After step S420, the N1 time, judge whether to meet the first defrost exit criteria.If so, then perform step S416；If
It is no, then perform step S418.
Wherein, N1, N2, N3 could be provided as identical or different.First defrost exit criteria and the second defrost exit criteria
It could be provided as identical or different.
It should be noted that parameter T01, T02, f, K, N1, N2, N3 can be drawn according to experimental data.Wherein, T02 ＞
T01, and T02 ＞ 0.
In the embodiment, the defrosting control method of net for air-source heat pump units mainly includes two parts：A part is switching mould
The formula defrost stage, that is, change four-way valve, and unit operation pattern is converted to refrigeration mode by heating mode, far high using condensation temperature
Defrost is carried out in environment temperature.Another part is the not switch mode defrost stage, i.e., ought meet defrost pattern, and environment temperature
When meeting certain condition, into not switch mode defrost, carried by adjusting compressor frequency, rotation speed of fan, expansion valve opening
High evaporating temperature, achievees the purpose that defrost.
When by the way of not switch mode defrost, it is contemplated that evaporating temperature and the environment temperature temperature difference are smaller, defrost week
Phase is longer, therefore compressor frequency directly can be dropped to corresponding frequency, while electronic expansion threshold values is also provided with a corresponding value.
The mode of the not switch mode defrost, compared to switch mode defrost, efficiently solves unit in the case of its switch mode defrost
The problem of user experience declines caused by not heating；In addition, by experiment it can be confirmed that directly switch mode defrost, consumption
Can be big, Energy Efficiency Ratio increases substantially, these can be ideally solved the problems, such as without switch mode, reaches the saving energy, improves the energy
Utilization rate, improves the heating capacity of unit and the effect of efficiency, effectively improves user experience.
According to the embodiment of the present disclosure, a kind of defrosting control device of net for air-source heat pump units is additionally provided, for execution
The defrosting control method for the net for air-source heat pump units stated.
Fig. 5 is a kind of structural frames of the defrosting control device of net for air-source heat pump units according to an exemplary embodiment
Figure, as shown in figure 5, the device includes：
First determination unit 50, for determining that net for air-source heat pump units meets defrost condition, wherein, the defrost condition is used
Defrost processing need to be carried out in characterizing the net for air-source heat pump units；
Detection unit 52, for detecting whether outdoor environment temperature meets the first preset temperature range, obtains testing result；
Second determination unit 54, for determining target defrost control model according to the testing result；
Defrost processing unit 56, for based on the target defrost control model to the net for air-source heat pump units execution
Frost processing.
Fig. 6 is a kind of structure of the defrosting control device of the net for air-source heat pump units shown according to another exemplary embodiment
Block diagram.As shown in fig. 6, the device includes the first above-mentioned determination unit 50, detection unit 52, the second determination unit 54 and defrost
Processing unit 56.Wherein, detection unit 52 can also include：
Detection module 60, for detecting whether the outdoor environment temperature reaches the first temperature threshold.
In a kind of optional embodiment, the second determination unit 54 can also include：
First determining module, in the case of reaching first temperature threshold in the outdoor environment temperature, with
For one pattern as the target defrost control model, the first mode is to carry out defrost processing based on improving evaporating temperature
Control model；And/or
Second determining module, in the case of being not up to first temperature threshold in the outdoor environment temperature, with
Second mode as the target defrost control model, the second mode in order to control the net for air-source heat pump units by heating mould
Formula is converted to the control model of refrigeration mode.
In a kind of optional embodiment, reach the situation of first temperature threshold in the outdoor environment temperature
Under, the defrost processing unit 56 can also include：
At least one parameter acquisition module, the following parameter for obtaining the net for air-source heat pump units：Compressor frequency,
Rotation speed of fan, expansion valve opening；
Parameter adjustment module, for adjusting the parameter to target sizes, with to the net for air-source heat pump units execution
Frost processing.
In a kind of optional embodiment, using the first mode as the target defrost control model to described
In the case that net for air-source heat pump units performs defrost processing, described device can also include：
Defrost temperature detecting unit, for according to preset period of time, whether detection defrost temperature to meet the second default temperature
Spend scope；
First defrost handles execution unit, in a case of no, the target defrost being used as using the first mode
Control model, performs the net for air-source heat pump units defrost processing.
In a kind of optional embodiment, defrost temperature detecting unit can also include：
Second temperature threshold detection module, for detecting whether the defrost temperature reaches second temperature threshold value.
In a kind of optional embodiment, in the case where the defrost temperature reaches the second temperature threshold value, institute
Stating device can also include：
Defrost exit criteria detection unit, for detecting whether the net for air-source heat pump units meets defrost exit criteria,
Wherein, the defrost exit criteria is not required to carry out defrost processing for characterizing the net for air-source heat pump units；If so, then stop holding
Row defrost is handled；
Second defrost handles execution unit, in a case of no, the target defrost being used as using the first mode
Control model performs the net for air-source heat pump units defrost processing.
In a kind of optional embodiment, the detection unit 52 can include：
Outdoor environment temperature detection module, for what is set outside the outdoor heat exchanger by the net for air-source heat pump units
First temperature sensing package, detects the outdoor environment temperature；
First judgment module, for judging whether the outdoor environment temperature meets first preset temperature range.
In a kind of optional embodiment, the defrost temperature detecting unit can include：
Defrost temperature detecting module, the second temperature sensing package set in the liquid pipe by the net for air-source heat pump units,
The defrost temperature is detected, wherein, the liquid pipe is the liquid of the coil pipe for the outdoor heat exchanger for entering the net for air-source heat pump units
Pipe；
Second judgment module, for judging whether the defrost temperature meets second preset temperature range.
The defrosting control device for the net for air-source heat pump units that the embodiment of the present disclosure provides, expires in definite net for air-source heat pump units
During sufficient defrost condition, whether detection outdoor environment temperature reaches the first preset temperature threshold value, and determines to carry out according to testing result
The target defrost control model of defrost, also can be according to room to perform defrost processing to net for air-source heat pump units based on the pattern
External environment temperature determines defrost processing mode, compared to single solution for diverse problems formula in correlation technique by the way of four-way valve commutation, subtracts
Lack energy consumption, improve the utilization rate of the energy.
According to the embodiment of the present disclosure, a kind of net for air-source heat pump units, including any of the above-described defrost control are additionally provided
Device processed.For more than defrosting control device being discussed in detail, which is not described herein again.
Those skilled in the art will readily occur to the present invention its after considering specification and putting into practice invention disclosed herein
Its embodiment.This application is intended to cover the present invention any variations, uses, or adaptations, these modifications, purposes or
Person's adaptive change follows the general principle of the present invention and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claims are pointed out.
It should be appreciated that the invention is not limited in the precision architecture for being described above and being shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is only limited by appended claims
System.
Claims (11)
- A kind of 1. defrosting control method of net for air-source heat pump units, it is characterised in that including：Determine that net for air-source heat pump units meets defrost condition, wherein, the defrost condition is used to characterize the air source heat pump machine Group need to carry out defrost processing；Whether detection outdoor environment temperature meets the first preset temperature range, obtains testing result；Target defrost control model is determined according to the testing result；Defrost processing performs the net for air-source heat pump units based on the target defrost control model.
- 2. according to the method described in claim 1, it is characterized in that, whether the detection outdoor environment temperature meets that first is default Temperature range, including：Detect whether the outdoor environment temperature reaches the first temperature threshold.
- 3. according to the method described in claim 2, it is characterized in that, described determine target defrosting control according to the testing result Pattern, including：In the case where the outdoor environment temperature reaches first temperature threshold, in the first pattern as the target defrost Control model, the first mode are to carry out the control model of defrost processing based on improving evaporating temperature；And/orIn the case where the outdoor environment temperature is not up to first temperature threshold, in a second mode as the targeted White control model, the net for air-source heat pump units is converted to the control of refrigeration mode by heating mode to the second mode in order to control Pattern.
- 4. according to the method described in claim 3, it is characterized in that, reach first temperature threshold in the outdoor environment temperature It is described that defrost processing performs the net for air-source heat pump units based on the target defrost control model in the case of value, including：Obtain at least one following parameter of the net for air-source heat pump units：Compressor frequency, rotation speed of fan, expansion valve opening；The parameter is adjusted to target sizes, to perform defrost processing to the net for air-source heat pump units.
- 5. according to the method any one of claim 3-4, it is characterised in that be used as the mesh using the first mode In the case of defrosting control pattern is marked to net for air-source heat pump units execution defrost processing, the method further includes：According to preset period of time, whether detection defrost temperature meets the second preset temperature range；If it is not, then using the first mode as the target defrost control model, to the net for air-source heat pump units execution Frost processing.
- 6. according to the method described in claim 5, it is characterized in that, whether the detection defrost temperature meets the second preset temperature Scope, including：Detect whether the defrost temperature reaches second temperature threshold value.
- 7. the method according to claim 5 or 6, it is characterised in that meet the described second default temperature in the defrost temperature In the case of spending scope, the method further includes：Detect whether the net for air-source heat pump units meets defrost exit criteria, wherein, the defrost exit criteria is used to characterize The net for air-source heat pump units is not required to carry out defrost processing；If so, then stop performing defrost processing；If it is not, defrost then is performed to the net for air-source heat pump units using the first mode as the target defrost control model Processing.
- 8. according to the method described in claim 1, it is characterized in that, whether the detection outdoor environment temperature meets that first is default Temperature range, including：By the first temperature sensing package set outside the outdoor heat exchanger of the net for air-source heat pump units, the outdoor environment temperature is detected Degree；Judge whether the outdoor environment temperature meets first preset temperature range.
- 9. according to the method described in claim 5, it is characterized in that, whether the detection defrost temperature meets the second preset temperature Scope, including：The second temperature sensing package set in liquid pipe by the net for air-source heat pump units, detects the defrost temperature, wherein, it is described Liquid pipe is the liquid pipe of the coil pipe for the outdoor heat exchanger for entering the net for air-source heat pump units；Judge whether the defrost temperature meets second preset temperature range.
- A kind of 10. defrosting control device of net for air-source heat pump units, it is characterised in that including：First determination unit, for determining that net for air-source heat pump units meets defrost condition, wherein, the defrost condition is used to characterize The net for air-source heat pump units need to carry out defrost processing；Detection unit, for detecting whether outdoor environment temperature meets the first preset temperature range, obtains testing result；Second determination unit, for determining target defrost control model according to the testing result；Defrost processing unit, for being performed based on the target defrost control model to the net for air-source heat pump units at defrost Reason.
- A kind of 11. net for air-source heat pump units, it is characterised in that including：Defrosting control device described in claim 10.
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| CN201711262006.6A CN108019972A (en) | 2017-12-04 | 2017-12-04 | Air source heat pump unit and defrosting control method and device thereof |
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| CN201711262006.6A CN108019972A (en) | 2017-12-04 | 2017-12-04 | Air source heat pump unit and defrosting control method and device thereof |
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| CN108917248A (en) * | 2018-08-30 | 2018-11-30 | 李国华 | A kind of defrosting control method of air source heat pump |
| CN109373514A (en) * | 2018-11-19 | 2019-02-22 | 青岛海尔空调电子有限公司 | A kind of air-conditioner outdoor unit defrosting control method |
| CN110986279A (en) * | 2019-12-03 | 2020-04-10 | 青岛海尔空调器有限总公司 | Method and device for self-cleaning control of air conditioner and air conditioner |
| CN111141007A (en) * | 2019-12-30 | 2020-05-12 | 宁波奥克斯电气股份有限公司 | Control method and control system for regulating frosting of air conditioner and air conditioner |
| CN112539521A (en) * | 2020-12-21 | 2021-03-23 | 珠海格力电器股份有限公司 | Air conditioner multi-split air conditioner and defrosting control method and device and storage medium thereof |
| CN113639408A (en) * | 2021-08-11 | 2021-11-12 | 海信（广东）空调有限公司 | Air conditioner and control method thereof |
| CN114353384A (en) * | 2021-12-18 | 2022-04-15 | 青岛海尔空调电子有限公司 | Air source heat pump unit and control method and control device thereof |
| CN114517991A (en) * | 2020-11-19 | 2022-05-20 | 同方人工环境有限公司 | Defrosting control system suitable for air source heat pump unit and control method thereof |
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| CN108917248A (en) * | 2018-08-30 | 2018-11-30 | 李国华 | A kind of defrosting control method of air source heat pump |
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| CN111141007A (en) * | 2019-12-30 | 2020-05-12 | 宁波奥克斯电气股份有限公司 | Control method and control system for regulating frosting of air conditioner and air conditioner |
| CN111141007B (en) * | 2019-12-30 | 2021-10-22 | 宁波奥克斯电气股份有限公司 | Control method and control system for regulating frosting of air conditioner and air conditioner |
| CN114517991A (en) * | 2020-11-19 | 2022-05-20 | 同方人工环境有限公司 | Defrosting control system suitable for air source heat pump unit and control method thereof |
| CN112539521A (en) * | 2020-12-21 | 2021-03-23 | 珠海格力电器股份有限公司 | Air conditioner multi-split air conditioner and defrosting control method and device and storage medium thereof |
| CN113639408A (en) * | 2021-08-11 | 2021-11-12 | 海信（广东）空调有限公司 | Air conditioner and control method thereof |
| CN114353384A (en) * | 2021-12-18 | 2022-04-15 | 青岛海尔空调电子有限公司 | Air source heat pump unit and control method and control device thereof |
| CN114353384B (en) * | 2021-12-18 | 2023-10-20 | 青岛海尔空调电子有限公司 | Air source heat pump unit and control method and control device thereof |
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