CN108981219A - A kind of control method of full-time energy-efficient frequency conversion water heating heat pump - Google Patents
A kind of control method of full-time energy-efficient frequency conversion water heating heat pump Download PDFInfo
- Publication number
- CN108981219A CN108981219A CN201810593993.6A CN201810593993A CN108981219A CN 108981219 A CN108981219 A CN 108981219A CN 201810593993 A CN201810593993 A CN 201810593993A CN 108981219 A CN108981219 A CN 108981219A
- Authority
- CN
- China
- Prior art keywords
- frequency
- temperature sensor
- real
- time
- superheat
- 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.)
- Pending
Links
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
- 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
- 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
- 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
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0253—Compressor control by controlling speed with variable speed
-
- 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
- F25B2600/25—Control of valves
- F25B2600/2513—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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
-
- 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
- F25B2700/2103—Temperatures near a heat exchanger
-
- 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
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21151—Temperatures of a compressor or the drive means therefor at the suction side of the compressor
-
- 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
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
-
- 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
- F25B2700/2117—Temperatures of an evaporator
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- 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 present invention relates to a kind of control methods of full-time energy-efficient frequency conversion water heating heat pump, comprise the following steps that step 1: getting out frequency conversion water heating heat pump；Step 2: pass through empirical data and test data, founding mathematical models；Step 3: start frequency conversion water heating heat pump and set target water temperature as Tset；Step 4: the target water temperature Tset of setting, frequency conversion heating machine are run with initial value；Step 5: frequency conversion heating machine real time execution frequency fhi operation；Step 6: best degree of superheat Φ in real time is calculated according to the running frequency fhi of the real time environment temperature Tai measured and the real-time water temperature Twi measured, frequency-changeable compressor 3i；Step 7: according to the aperture of the deviation adjusting electronic expansion of real-time degree of superheat Tsi-Tei and real-time best degree of superheat Φ i；Step 8: reach set temperature Tset and then enter next step；Step 9: low frequency ties up warm energy-saving run.This method approaches the real-time degree of superheat to the real-time best efficiency degree of superheat, and frequency conversion water heating heat pump can be made to run always by best efficiency.
Description
Technical field
The present invention relates to a kind of control methods of full-time energy-efficient frequency conversion water heating heat pump.
Background technique
Due to frequency conversion air source heating heat pump compared to determine frequency air source heating heat pump energy varying duty, quickly heat, it is more energy efficient,
It is more environmentally friendly, there is better comfort, frequency conversion air source heating heat pump has been more and more widely used.But frequency conversion water heating heat pump
The good or not that these superiority play, depends primarily on control method, good control method, a control logic can make frequency conversion
The efficiency and superiority of heat pump perform to optimum efficiency, and the key of its control is the control and throttling to frequency-changeable compressor frequency
The aperture of device electric expansion valve controls.
Present control method is, according to environment temperature Ta, real-time water temperature Tw and setting target water temperature Tset, by looking into
The mode of table and function algorithm determines compressor operating frequency, because the method for table is it is also assumed that be a kind of discrete function shape
Formula, so the control of frequency can be described as function fh (Ta, Tw, Tset), and the control to throttling electronic expansion valve opening K,
Mainly controlled according to frequency-changeable compressor return-air degree of superheat Ts-Te or discharge superheat Td-Tc, or be aided with environment temperature and
The correction factor of heating water temperature is determined, or is aided with delivery temperature and suction temperature to correct, that is, thinks (the environment under a certain operating condition
Temperature and water temperature), keep the return-air degree of superheat or discharge superheat heat pumps within the scope of some to have best Energy Efficiency Ratio, this mistake
Temperature is referred to as the best efficiency degree of superheat, and the best efficiency degree of superheat mainly with environment temperature, water temperature, compressor air suction temperature,
Delivery temperature is related, that is, is directed to different environment temperatures, water temperature, compressor air suction temperature, delivery temperature, carrys out a presetting mesh
The return-air degree of superheat or discharge superheat are marked, control system deviates target superheat further according to the practical return-air degree of superheat or discharge superheat
The bias of degree opens big or turns down electric expansion valve, makes the practical degree of superheat always within the scope of preset target superheat degree, uses
Mathematic functional forms expression then means that electronic expansion valve opening K is environment temperature Ta, water temperature T w, compressor air suction temperature Ts, row
The variable of temperature degree Td, return-air degree of superheat Ts-Te, discharge superheat Td-Tc, i.e. K be K(Ts-Te), K(Td-Tc), K(Ts-
Te, Tw, Ta, Ts, Td) or K(Td-Tc, Tw, Ta, Ts, Td).
But in fact, the best efficiency degree of superheat not only with environment temperature, water temperature, compressor air suction temperature, delivery temperature phase
It closes, it is also very big with the frequency relation of compressor operation, if attached drawing 1 is the variation relation of best the efficiency degree of superheat and frequency, with
Frequency becomes smaller, and the best efficiency degree of superheat significantly increases.So these control methods are defining most Canon to frequency conversion water heating heat pump at present
The influence of compressor operating frequency is not accounted for when imitating the degree of superheat, there are clearly disadvantageous and defects, cannot make heat pump always
It is run with best Energy Efficiency Ratio, prevent the power savings advantages of converter technique from bringing into play well.
Summary of the invention
It is proposed that one kind keeps the operation of frequency conversion water heating heat pump more efficient, more energy efficient the invention solves above-mentioned technical problem,
Give full play to the control method of the full-time energy-efficient frequency conversion water heating heat pump of the power savings advantages of converter technique.
The control method of the full-time energy-efficient frequency conversion water heating heat pump of one kind according to the present invention, comprises the following steps that
It comprises the following steps that
Step 1: it is ready to by condensing heat exchanger, electric expansion valve, evaporating heat exchanger, four-way valve, frequency-changeable compressor and frequency conversion
The frequency conversion water heating heat pump of controller composition；Wherein, condensing heat exchanger, electronics are sequentially connected between the two of them opening of four-way valve
Other two opening of expansion valve and evaporating heat exchanger, four-way valve is connect with frequency-changeable compressor, electric expansion valve, four-way valve and
Frequency-changeable compressor is connect with frequency-variable controller, and condensation temperature sensor is respectively set in the medium side of condensing heat exchanger and water side
And water temperature sensor, evaporating temperature sensor and environment temperature sensor are set in evaporating heat exchanger, in the row of frequency-changeable compressor
Exhaust gas temperature sensor and suction temperature sensor is respectively set in air pipe and return line, wherein condensation temperature sensor, water
Temperature sensor, evaporating temperature sensor, environment temperature sensor, exhaust gas temperature sensor and suction temperature sensor are and frequency conversion
Controller connection；
Step 2: by empirical data and test data, the best efficiency degree of superheat under varying environment temperature and different water temperatures is established
With variation relation mathematical model, frequency-changeable compressor running frequency and the environment temperature Ta, water temperature T w, setting target water temperature of frequency
The control mathematical model and frequency-changeable compressor initial launch frequency fhc, electric expansion valve of Tset and water temperature change rate △ Tw relationship
Initial opening Kc control mathematical model；
Step 3: start frequency conversion water heating heat pump and set target water temperature as Tset；
Step 4: the water temperature T w data that the environment temperature Ta that is measured according to environment temperature sensor, water temperature sensor measure, and set
Fixed target water temperature Tset calculates load initial value Qc, running frequency initial value fhc and electric expansion valve initial opening Kc, frequency conversion
Heating machine is run with initial value；
Step 5: the real-time water temperature that the real time environment temperature Tai that is measured according to environment temperature sensor 8, water temperature sensor measure
Twi data and water temperature change rate △ Twi, and the target water temperature Tset of setting, calculate real-time load Qi, running frequency fhi,
Frequency conversion heating machine real time execution frequency fhi operation；
Step 6: it is respectively calculated out real-time degree of superheat Tsi-Tei；It is measured in real time according to environment temperature sensor real-time
The running frequency fhi of real-time water temperature Twi, frequency-changeable compressor that environment temperature Tai, water temperature sensor measure in real time are calculated in real time
Best degree of superheat Φi；
Step 7: according to the real-time degree of superheat Tsi-Tei and in real time aperture of the deviation adjusting electronic expansion of best degree of superheat Φ i,
Run system with optimum efficiency always；
Step 8: determine whether to reach set temperature Ti=Tset；Not up to set temperature TsetResumes step five reaches setting temperature
Degree Tset then enters next step；
Step 9: low frequency ties up warm energy-saving run.
It is specific further, in step 4, load initial value Qc, running frequency initial value fhc and electric expansion valve initial opening
The functional expression of Kc is to be tested by experiment and establish formation according to fitting experimental data formula.
Specific further, in step 5, the functional expression of real-time load Qi and running frequency fhi are tested by experiment
And formation is established according to fitting experimental data formula.
It is specific further in step 6, to introduce best efficiency degree of superheat concept, defining the best efficiency degree of superheat
When, it is included in this significant variable of the in due course running frequency of frequency-changeable compressor, the best efficiency degree of superheat and environment temperature, water temperature, frequency conversion
The relationship of compressor operating frequency is tested by experiment and is established according to experimental data, is indicated in table form or with function
Form indicate.
The beneficial effects of the present invention are: this method is according to the best efficiency degree of superheat relational expression, so that it may establish to electronics
The control logic of expansion valve opening approaches the real-time degree of superheat to the real-time best efficiency degree of superheat, i.e., according to the real-time degree of superheat with
The departure of the best efficiency degree of superheat adjusts the aperture of electric expansion valve in real time, can make frequency conversion water heating heat pump always by most Canon
Effect operation, reaches best energy-saving effect, gives full play to the power savings advantages of frequency conversion water heating heat pump.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that.
The variation relation figure of Fig. 1 best the efficiency degree of superheat and frequency.
Fig. 2 is the structural schematic diagram of frequency conversion water heating heat pump in the present invention.
Fig. 3 is the flow chart of control method of the invention.
It is description of symbols below:
Frequency-variable controller 1, exhaust gas temperature sensor 2, frequency-changeable compressor 3, suction temperature sensor 4, four-way reversing valve 5, evaporation
Heat exchanger 6, evaporating temperature sensor 7, environment temperature sensor 8, electric expansion valve 9, condensing heat exchanger 10, water temperature sensor
11, condensation temperature sensor 12.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
A kind of full-time energy-efficient frequency conversion water heating heat pump according to an embodiment of the present invention is described below with reference to Fig. 1 to Fig. 3
Control method, comprise the following steps that
Step 1: be ready to by condensing heat exchanger 6, electric expansion valve 9, evaporating heat exchanger 6, four-way valve 5, frequency-changeable compressor 3 with
And the frequency conversion water heating heat pump that frequency-variable controller 1 forms；Wherein, condensation is sequentially connected between the two of them opening of four-way valve 5 to change
Other two opening of hot device 6, electric expansion valve 9 and evaporating heat exchanger 6, four-way valve 5 is connect with frequency-changeable compressor 3, and electronics is swollen
Swollen valve 9, four-way valve 5 and frequency-changeable compressor 3 are connect with frequency-variable controller 1, in the medium side of condensing heat exchanger 6 and water side point
Not She Zhi condensation temperature sensor 12 and water temperature sensor 11, in evaporating heat exchanger 12, evaporating temperature sensor 7 and environment are set
Exhaust gas temperature sensor 2 and return air temperature is respectively set in the gas exhaust piping and return line of frequency-changeable compressor 3 in temperature sensor 8
Spend sensor 4, wherein condensation temperature sensor 12, water temperature sensor 11, evaporating temperature sensor 7, environment temperature sensor 8,
Exhaust gas temperature sensor 2 and suction temperature sensor 4 are connect with frequency-variable controller；
Step 2: by empirical data and test data, the best efficiency degree of superheat under varying environment temperature and different water temperatures is established
With variation relation mathematical model, 3 running frequency of frequency-changeable compressor and the environment temperature Ta, water temperature T w, setting target water temperature of frequency
3 initial launch frequency fhc of control mathematical model and frequency-changeable compressor, the electric expansion valve of Tset and water temperature change rate △ Tw relationship
9 initial opening Kc control mathematical models；
Step 3: start frequency conversion water heating heat pump and set target water temperature as Tset；
Step 4: the water temperature T w data that the environment temperature Ta that is measured according to environment temperature sensor 8, water temperature sensor 7 measure, and
The target water temperature Tset of setting calculates load initial value Qc, running frequency initial value fhc and 9 initial opening Kc of electric expansion valve, becomes
Frequency heating machine is run with initial value；
Step 5: the real-time water temperature that the real time environment temperature Tai that is measured according to environment temperature sensor 8, water temperature sensor 7 measure
Twi data and water temperature change rate △ Twi, and the target water temperature Tset of setting, calculate real-time load Qi, running frequency fhi,
Frequency conversion heating machine real time execution frequency fhi operation；
Step 6: it is respectively calculated out real-time degree of superheat Tsi-Tei；The reality measured in real time according to environment temperature sensor 8
When environment temperature Tai, the real-time water temperature Twi that water temperature sensor 7 measures in real time, frequency-changeable compressor 3 running frequency fhi calculate
Best degree of superheat Φ in real timei；
Step 7: according to the real-time degree of superheat Tsi-Tei and in real time aperture of the deviation adjusting electronic expansion 9 of best degree of superheat Φ i,
Run system with optimum efficiency always；
Step 8: determine whether to reach set temperature Ti=Tset；Not up to set temperature TsetResumes step five reaches setting temperature
Degree Tset then enters next step；
Step 9: low frequency ties up warm energy-saving run.
Furtherly, in step 4, load initial value Qc, running frequency initial value fhc and 9 initial opening of electric expansion valve
The functional expression of Kc is to be tested by experiment and establish formation according to fitting experimental data formula.
Furtherly, in step 5, the functional expression of real-time load Qi and running frequency fhi are tested by experiment
And formation is established according to fitting experimental data formula.
Furtherly, in step 6, best efficiency degree of superheat concept is introduced, is defining the best efficiency degree of superheat
When, it is included in this significant variable of the in due course running frequency of compressor, the best efficiency degree of superheat and environment temperature, water temperature, frequency conversion are compressed
The relationship of 3 running frequency of machine is tested by experiment and is established according to experimental data, is indicated in table form or with function
Form indicates.
This method is according to the best efficiency degree of superheat relational expression, so that it may which the control of 9 aperture of electric expansion valve is patrolled in foundation
Volume, approach the real-time degree of superheat to the real-time best efficiency degree of superheat, i.e. the best efficiency degree of superheat according to the real-time degree of superheat and in real time
Departure adjust the aperture of electric expansion valve 9, frequency conversion water heating heat pump can be made to run always by best efficiency, reach best
Energy-saving effect gives full play to the power savings advantages of frequency conversion water heating heat pump.Wherein mathematical model is for referring to certain things system
Feature or quantity dependence, using mathematical linguistics, a kind of mathematic(al) structure briefly or approximatively stated out, this mathematics knot
Structure is the pure relational structure that certain system come is depicted by means of mathematic sign.From broad understanding, mathematical model includes mathematics
In each conception of species, various formula and various theories.Because they are abstracted by the prototype of real world, from this meaning
It is said in justice, entire mathematics could also say that a science about mathematical model.Understand from narrow sense, mathematical model only refers to that those are anti-
The mathematical relationship structure of particular problem or specific specific things system is reflected, also being understood as connection one in this meaning is
The mathematical expression of relationship in system in each variable.
The present invention also part step further illustrate, the frequency conversion water heating heat pump include be sequentially connected frequency-variable controller 1,
Exhaust gas temperature sensor 2, frequency-changeable compressor 3, suction temperature sensor 4, four-way reversing valve 5, evaporating heat exchanger 6, evaporating temperature
Sensor 7, environment temperature sensor 8, electric expansion valve 9, condensing heat exchanger 10, water temperature sensor 11 and condensation temperature sensor
12, four-way reversing valve 5, electric expansion valve 9, frequency-changeable compressor 3, condensation temperature sensor 12, water temperature sensor 11, evaporating temperature
Sensor 7, environment temperature sensor 8, exhaust gas temperature sensor 2 and suction temperature sensor 4 connect with frequency-variable controller 1 respectively
Connect, four-way valve be equipped with C mouthful, E mouthfuls, D mouthfuls and S mouthfuls, the C mouth of four-way valve with E mouthfuls be sequentially connected condensing heat exchanger, evaporating heat exchanger and
Electric expansion valve, the D mouth of four-way valve and S mouthfuls are connect with the exhaust of frequency-changeable compressor and suction side.
Embodiment 1:
The real time environment temperature Tai that environment temperature sensor 8 measures in real time is 7 DEG C
The real-time water temperature Twi that water temperature sensor 7 measures in real time is 45 DEG C
Twi=1 DEG C water temperature change rate △
And target water temperature Tset=50 DEG C of setting,
Calculating running frequency fhi is 70Hz and real-time best degree of superheat Φ respectivelyiIt is 2.
Embodiment 2:
The real time environment temperature Tai that environment temperature sensor 8 measures in real time is 7 DEG C
The real-time water temperature Twi that water temperature sensor 7 measures in real time is 45 DEG C
Twi=1 DEG C water temperature change rate △
And target water temperature Tset=46 DEG C of setting,
Calculating running frequency fhi is 45Hz and real-time best degree of superheat Φ respectivelyiIt is 3.5.
Embodiment 3:
The real time environment temperature Tai that environment temperature sensor 8 measures in real time is 7 DEG C
The real-time water temperature Twi that water temperature sensor 7 measures in real time is 35 DEG C
Twi=0.5 DEG C water temperature change rate △
And target water temperature Tset=46 DEG C of setting,
Calculating running frequency fhi is 80Hz and real-time best degree of superheat Φ respectivelyiIt is 1.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (4)
1. a kind of control method of full-time energy-efficient frequency conversion water heating heat pump, it is characterised in that: comprise the following steps that
Step 1: it is ready to by condensing heat exchanger (6), electric expansion valve (9), evaporating heat exchanger (6), four-way valve (5), frequency conversion pressure
The frequency conversion water heating heat pump of contracting machine (3) and frequency-variable controller (1) composition；Wherein, four-way valve (5) two of them opening between according to
Secondary connection condensing heat exchanger (6), electric expansion valve (9) and evaporating heat exchanger (6), other two opening of four-way valve (5) and change
Frequency compressor (3) connection, electric expansion valve (9), four-way valve (5) and frequency-changeable compressor (3) connect with frequency-variable controller (1)
It connects, condensation temperature sensor (12) and water temperature sensor (11) is respectively set in the medium side of condensing heat exchanger (6) and water side,
Evaporating temperature sensor (7) and environment temperature sensor (8), the exhaust in frequency-changeable compressor (3) is arranged in evaporating heat exchanger (12)
Exhaust gas temperature sensor (2) and suction temperature sensor (4) is respectively set in pipeline and return line, wherein condensation temperature sensing
Device (12), water temperature sensor (11), evaporating temperature sensor (7), environment temperature sensor (8), exhaust gas temperature sensor (2) and
Suction temperature sensor (4) is connect with frequency-variable controller；
Step 2: by empirical data and test data, the best efficiency degree of superheat under varying environment temperature and different water temperatures is established
With variation relation mathematical model, frequency-changeable compressor running frequency and the environment temperature Ta, water temperature T w, setting target water temperature of frequency
The control mathematical model and frequency-changeable compressor initial launch frequency fhc, electric expansion valve of Tset and water temperature change rate △ Tw relationship
Initial opening Kc control mathematical model；
Step 3: start frequency conversion water heating heat pump and set target water temperature as Tset；
Step 4: the water temperature T w number that the environment temperature Ta that is measured according to environment temperature sensor (8), water temperature sensor (7) measure
According to, and the target water temperature Tset of setting, it calculates load initial value Qc, running frequency initial value fhc and electric expansion valve (9) is initially opened
Kc is spent, frequency conversion heating machine is run with initial value；
Step 5: the real time environment temperature Tai that is measured according to environment temperature sensor (8), water temperature sensor (7) measure real-time
Water temperature T wi data and water temperature change rate △ Twi, and the target water temperature Tset of setting, calculate real-time load Qi, running frequency
Fhi, frequency conversion heating machine real time execution frequency fhi operation；
Step 6: it is respectively calculated out real-time degree of superheat Tsi-Tei；It is measured in real time according to environment temperature sensor (8)
The running frequency fhi meter of real-time water temperature Twi, frequency-changeable compressor (3) that real time environment temperature Tai, water temperature sensor 7 measure in real time
Calculate best degree of superheat Φ in real timei；
Step 7: according to opening for deviation adjusting electronic expansion (9) of real-time degree of superheat Tsi-Tei and real-time best degree of superheat Φ i
Degree, runs system with optimum efficiency always；
Step 8: determine whether to reach set temperature Ti=Tset；Not up to set temperature TsetResumes step five, reaches set temperature
Tset then enters next step；
Step 9: low frequency ties up warm energy-saving run.
2. the control method of full-time energy-efficient frequency conversion water heating heat pump according to claim 1, it is characterised in that: in step 4
In, the functional expression of load initial value Qc, running frequency initial value fhc and electric expansion valve (9) initial opening Kc are surveyed by experiment
It tries and formation is established according to fitting experimental data formula.
3. the control method of full-time energy-efficient frequency conversion water heating heat pump according to claim 1, it is characterised in that: in step 5
In, the functional expression of real-time load Qi and running frequency fhi are to be tested by experiment and built according to fitting experimental data formula
Vertical formation.
4. the control method of full-time energy-efficient frequency conversion water heating heat pump according to claim 1, it is characterised in that: in step 6
In, best efficiency degree of superheat concept is introduced, when defining the best efficiency degree of superheat, frequency-changeable compressor (3) is included in and runs in due course
This significant variable of frequency, the best efficiency degree of superheat and environment temperature, water temperature, the relationship of frequency-changeable compressor (3) running frequency are logical
It crosses experiment to test and established according to experimental data, indicates or indicated in the form of function in table form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810593993.6A CN108981219A (en) | 2018-06-11 | 2018-06-11 | A kind of control method of full-time energy-efficient frequency conversion water heating heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810593993.6A CN108981219A (en) | 2018-06-11 | 2018-06-11 | A kind of control method of full-time energy-efficient frequency conversion water heating heat pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108981219A true CN108981219A (en) | 2018-12-11 |
Family
ID=64540171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810593993.6A Pending CN108981219A (en) | 2018-06-11 | 2018-06-11 | A kind of control method of full-time energy-efficient frequency conversion water heating heat pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108981219A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110906541A (en) * | 2019-12-05 | 2020-03-24 | 顺德职业技术学院 | Method for accurately judging refrigerant leakage of variable-frequency heat pump water heater for heating |
| WO2021103054A1 (en) * | 2019-11-28 | 2021-06-03 | 江苏苏净集团有限公司 | Multi-parallel carbon dioxide heat pump control method based on target load control |
| CN114427694A (en) * | 2022-01-27 | 2022-05-03 | 北能合创(北京)科技有限公司 | Defrosting control method for air source heat pump unit and air source heat pump |
| US11326805B2 (en) * | 2019-03-15 | 2022-05-10 | Carrier Corporation | Control method for air conditioning system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09236338A (en) * | 1996-02-29 | 1997-09-09 | Kobe Steel Ltd | Heat pump |
| CN102374714A (en) * | 2011-11-09 | 2012-03-14 | 江苏天舒电器有限公司 | Control method for electronic expansion valve of heat-pump water heater and control device thereof |
| CN104833066A (en) * | 2015-04-23 | 2015-08-12 | 广东芬尼克兹节能设备有限公司 | Mode switching method for variable frequency heat pump |
| CN104930713A (en) * | 2015-05-26 | 2015-09-23 | 珠海格力电器股份有限公司 | Initial frequency control method and control device for variable-frequency compressor of heat pump water heater |
| CN106765927A (en) * | 2016-12-13 | 2017-05-31 | 青岛海尔空调器有限总公司 | The control method of air-conditioning expansion valve |
| CN107883571A (en) * | 2017-10-27 | 2018-04-06 | 顺德职业技术学院 | Frequency conversion two-stage compression heat pump water heater frequency dynamic optimizes and control method |
-
2018
- 2018-06-11 CN CN201810593993.6A patent/CN108981219A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09236338A (en) * | 1996-02-29 | 1997-09-09 | Kobe Steel Ltd | Heat pump |
| CN102374714A (en) * | 2011-11-09 | 2012-03-14 | 江苏天舒电器有限公司 | Control method for electronic expansion valve of heat-pump water heater and control device thereof |
| CN104833066A (en) * | 2015-04-23 | 2015-08-12 | 广东芬尼克兹节能设备有限公司 | Mode switching method for variable frequency heat pump |
| CN104930713A (en) * | 2015-05-26 | 2015-09-23 | 珠海格力电器股份有限公司 | Initial frequency control method and control device for variable-frequency compressor of heat pump water heater |
| CN106765927A (en) * | 2016-12-13 | 2017-05-31 | 青岛海尔空调器有限总公司 | The control method of air-conditioning expansion valve |
| CN107883571A (en) * | 2017-10-27 | 2018-04-06 | 顺德职业技术学院 | Frequency conversion two-stage compression heat pump water heater frequency dynamic optimizes and control method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11326805B2 (en) * | 2019-03-15 | 2022-05-10 | Carrier Corporation | Control method for air conditioning system |
| WO2021103054A1 (en) * | 2019-11-28 | 2021-06-03 | 江苏苏净集团有限公司 | Multi-parallel carbon dioxide heat pump control method based on target load control |
| CN110906541A (en) * | 2019-12-05 | 2020-03-24 | 顺德职业技术学院 | Method for accurately judging refrigerant leakage of variable-frequency heat pump water heater for heating |
| CN114427694A (en) * | 2022-01-27 | 2022-05-03 | 北能合创(北京)科技有限公司 | Defrosting control method for air source heat pump unit and air source heat pump |
| CN114427694B (en) * | 2022-01-27 | 2023-09-29 | 北能合创(北京)科技有限公司 | Defrosting control method for air source heat pump unit and air source heat pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108981219A (en) | A kind of control method of full-time energy-efficient frequency conversion water heating heat pump | |
| CN103119377B (en) | Refrigeration hot water supply apparatus and refrigeration hot water supply method | |
| CN104501421B (en) | A kind of control method of frequency conversion two-stage compression heat pump water heater | |
| CN107218725B (en) | A kind of control method of electric expansion valve, control device and Teat pump boiler | |
| CN107461960B (en) | Heat pump unit and its energy-saving control method and control device | |
| CN203823880U (en) | Flow control device and fluid loop system | |
| CN103370584B (en) | Refrigerating circulatory device and kind of refrigeration cycle control method | |
| CN105423498B (en) | Control method of air conditioning system and air conditioning system | |
| EP2261574A1 (en) | Heat-pump hot water apparatus | |
| CN106352627A (en) | Air conditioner and control method and device thereof | |
| CN104976840B (en) | A kind of control method for electronic expansion valve of wind-cooled cold-water or Hot water units | |
| CN103712309A (en) | Air-conditioner refrigerant flow control method | |
| CN104613651A (en) | Frequency adjustment method of variable-frequency heat-pump water heater | |
| RU2008143066A (en) | AIR CONDITIONING SYSTEM USING THE HEAT PUMP AND METHOD OF MANAGING THE MENTIONED SYSTEM | |
| CN104633942A (en) | Frequency adjusting and control method for variable-frequency enhanced vapor injection heat-pump water heater | |
| EP3324137B1 (en) | Air conditioner and control method thereof | |
| CN108626778A (en) | A kind of control method of energy-efficient frequency conversion water heating heat pump | |
| CN108507170A (en) | Control method and device for heat pump hot water system | |
| CN109681416A (en) | The control method of cooling pump | |
| JP2007255845A (en) | Refrigerating cycle device | |
| CN105823282A (en) | Discharge pressure control method used for optimized operation of carbon dioxide heat pump system | |
| CN111594983A (en) | Frosting control device and method and air conditioner | |
| CN104075369A (en) | Heat pump water heater | |
| CN108036514B (en) | Water tank target water temperature control method and air source heat pump type water heater | |
| Wang et al. | Data-driven model predictive control of transcritical CO2 systems for cabin thermal management in cooling mode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181211 |
|
| RJ01 | Rejection of invention patent application after publication |