CN107906752B - The optimization of twin-stage frequency conversion two-stage compression heat pump water heater frequency dynamic and control method - Google Patents
The optimization of twin-stage frequency conversion two-stage compression heat pump water heater frequency dynamic and control method Download PDFInfo
- Publication number
- CN107906752B CN107906752B CN201711021478.2A CN201711021478A CN107906752B CN 107906752 B CN107906752 B CN 107906752B CN 201711021478 A CN201711021478 A CN 201711021478A CN 107906752 B CN107906752 B CN 107906752B
- Authority
- CN
- China
- Prior art keywords
- frequency
- pressure stage
- low
- changeable compressor
- temperature
- 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.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 34
- 230000006835 compression Effects 0.000 title claims abstract description 24
- 238000007906 compression Methods 0.000 title claims abstract description 24
- 238000005457 optimization Methods 0.000 title claims abstract description 19
- 238000005265 energy consumption Methods 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims description 17
- 230000033228 biological regulation Effects 0.000 claims description 9
- 238000013459 approach Methods 0.000 claims description 6
- 239000002826 coolant Substances 0.000 claims description 6
- 238000005057 refrigeration Methods 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
- F24H4/04—Storage heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/10—Control of fluid heaters characterised by the purpose of the control
- F24H15/156—Reducing the quantity of energy consumed; Increasing efficiency
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/10—Control of fluid heaters characterised by the purpose of the control
- F24H15/174—Supplying heated water with desired temperature or desired range of temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/212—Temperature of the water
- F24H15/223—Temperature of the water in the water storage tank
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/227—Temperature of the refrigerant in heat pump cycles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/258—Outdoor temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/281—Input from user
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/375—Control of heat pumps
- F24H15/38—Control of compressors of heat pumps
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Air Conditioning Control Device (AREA)
Abstract
It include low-pressure stage frequency-changeable compressor, low-pressure stage compressor exhaust temperature sensor, hiigh pressure stage frequency-changeable compressor, high pressure stage compressor exhaust gas temperature sensor, controller, tank sensor, water tank, condenser, hiigh pressure stage electric expansion valve, intercooler temperature sensor, intercooler, low-pressure stage electric expansion valve, evaporator and outdoor temperature sensor the present invention relates to a kind of optimization of twin-stage frequency conversion two-stage compression heat pump water heater frequency dynamic and control method, twin-stage frequency conversion two-stage compression heat pump water heater；Feature is: during Teat pump boiler whole service, adjusting to the working frequency dynamic optimization of low-pressure stage frequency-changeable compressor and hiigh pressure stage frequency-changeable compressor, keeps the total energy consumption of Teat pump boiler whole service process minimum.Its major advantage is: making twin-stage frequency conversion two-stage compression heat pump water heater dynamic optimization low-pressure stage compressor and high pressure stage compressor working frequency during whole service, keeps whole service process total energy consumption minimum.
Description
Technical field
The present invention relates to heat-pump water heater control method, especially a kind of twin-stage frequency conversion two-stage compression heat pump water heater frequency
Optimization and control method.
Background technique
Two-stage compression heat pump water heater can produce high-temperature-hot-water under lower outdoor environment temperature.Low-pressure stage compressor and
High pressure stage compressor is all made of the twin-stage frequency conversion two-stage compression heat pump water heater heating capacity regulating power and efficiency of frequency-changeable compressor
Than higher.The frequency conversion two-stage compression heat pump water heater of invariable frequency compressor is used using frequency-changeable compressor, hiigh pressure stage for low-pressure stage,
To improve its operational energy efficiency ratio, Chinese patent discloses the invention of " a kind of control method of frequency conversion two-stage compression heat pump water heater "
Patent, patent of invention number are ZL201410759807.3, can be according to user's heat demand and Teat pump boiler outdoor environment
The medium temperature of temperature, water tank temperature dynamic regulation low-pressure stage compressor operating frequency and heat pump refrigerating；The basic principle is that making
Teat pump boiler during whole service each moment instantaneous Energy Efficiency Ratio as close possible to the best efficiency under the operating condition
Than namely instantaneous Energy Efficiency Ratio of each moment it is higher, Teat pump boiler whole service under conditions of obtaining identical total heating capacity
Total energy consumption is smaller in journey；But the condition that this conclusion is set up is that the instantaneous heating capacity of heat pump must be equal during whole service.It is real
Teat pump boiler leads to heat-pump hot-water in the process of running due to the variation of operating condition and the variation of compressor frequency on border
The instantaneous heating capacity of device changes greatly, therefore the frequency conversion double stage heat pump water heater low-pressure stage compressor frequency that aforementioned patent document proposes
Adjusting method is still to be optimized, namely in frequency conversion double stage heat pump water heater low-pressure stage compressor frequency optimization process, also needs to examine
Consider the variation of instantaneous heating capacity, can just make Teat pump boiler whole service process total energy consumption minimum.In addition, twin-stage frequency conversion twin-stage pressure
There is also the coupled problems between low-pressure stage compressor operating frequency and high pressure stage compressor working frequency for contracting Teat pump boiler.
Summary of the invention
A kind of twin-stage frequency conversion two-stage compression heat pump hot water provided the purpose of the present invention is overcome the deficiencies in the prior art
The optimization of device frequency dynamic and control method, can be according to user's heat demand and Teat pump boiler outdoor environment temperature, water tank temperature
Dynamic regulation low-pressure stage frequency-changeable compressor working frequency is spent, while according to Teat pump boiler refrigeration system optimum interstage temperature, being adjusted
Hiigh pressure stage frequency-changeable compressor working frequency is saved, keeps Teat pump boiler whole service process total energy consumption minimum, reaches energy saving purpose.
It in order to achieve the above object, the invention is realized in this way, is a kind of twin-stage frequency conversion two-stage compression heat pump hot water
The optimization of device frequency dynamic and control method, twin-stage frequency conversion two-stage compression heat pump water heater includes low-pressure stage frequency-changeable compressor, low pressure
Grade compressor exhaust temperature sensor, hiigh pressure stage frequency-changeable compressor, high pressure stage compressor exhaust gas temperature sensor, controller, water
Case sensor, water tank, condenser, hiigh pressure stage electric expansion valve, intercooler temperature sensor, intercooler, low-pressure stage
Electric expansion valve, evaporator and outdoor temperature sensor；Low-pressure stage frequency-changeable compressor, intercooler, low-pressure stage electronic expansion
Valve and evaporator are sequentially connected in series connection and form a coolant loop, hiigh pressure stage frequency-changeable compressor, condenser, hiigh pressure stage electric expansion valve
And intercooler is sequentially connected in series connection and forms another coolant loop, low-pressure stage compressor exhaust temperature sensor sensing low-pressure stage
The temperature of frequency-changeable compressor exhaust outlet, high pressure stage compressor exhaust gas temperature sensor incude hiigh pressure stage frequency-changeable compressor exhaust outlet
Temperature, tank sensor incude the temperature of water tank, the temperature of intercooler temperature sensor senses intercooler, outdoor temp
Spend sensor sensing evaporator outdoor temperature, controller respectively with low-pressure stage compressor exhaust temperature sensor, hiigh pressure stage pressure
Contracting machine exhaust gas temperature sensor, tank sensor, intercooler temperature sensor and outdoor temperature sensor output end are electrically connected
It connects, condenser is located in water tank；It is characterized in that during Teat pump boiler whole service, to low-pressure stage frequency-changeable compressor and height
The working frequency dynamic optimization of frequency-changeable compressor of arbitrarily downgrading is adjusted, and keeps the total energy consumption of Teat pump boiler whole service process minimum；It is low
Arbitrarily downgrade frequency-changeable compressor and hiigh pressure stage frequency-changeable compressor working frequency dynamic optimization adjusting method it is as follows:
(a) Teat pump boiler is established with outdoor environment temperature T1, water tank actual temperature T2Variation, with best instantaneous efficiency
Than the heat pump refrigeration system medium temperature T that EER is target3Relational expression I: T3=F(T1,T2)；
(b) the instantaneous heating capacity q of Teat pump boiler and outdoor environment temperature T are established1, water tank actual temperature T2And low-pressure stage
The working frequency f of frequency-changeable compressoraBetween II: q=E of relational expression (T1,T2,fa)；According to the available heat-pump hot-water of relational expression II
The expression formula III of total heating capacity Q in device whole service time t:；
(c) the instantaneous energy consumption p of Teat pump boiler and outdoor environment temperature T are established1, water tank actual temperature T2And low-pressure stage becomes
The working frequency f of frequency compressoraBetween IV: p=F of relational expression (T1,T2,fa)；According to the available heat-pump hot-water of relational expression IV
The expression formula V of total energy consumption P in device whole service time t:；
(d) user sets the specific moment t with water0With water tank water temperature T, controller detects the actual temperature T of current water tank2,
Total heating capacity Q needed for calculating, using Teat pump boiler whole service process total energy consumption P minimum as target value, according to expression formula
III and expression formula V the working frequency f of low-pressure stage frequency-changeable compressor during whole service is calculatedaChange with runing time t
Relational expression VI: fa=F (t), Teat pump boiler are compressed during whole service by VI dynamic regulation low-pressure stage frequency conversion of relational expression
The working frequency f of machinea；
(e) controller detects outdoor environment temperature T1, water tank actual temperature T2, it is calculated in best according to relational expression I
Between temperature T3, by the working frequency f for adjusting hiigh pressure stage frequency-changeable compressorb, detect medium temperature sensor practical intermediate warm
The optimum interstage temperature T that degree approach is calculated3Value.
In the technical scheme, during Teat pump boiler whole service, relational expression VI is simplified to obtain one kind
The working frequency of temperature section, discrete low-pressure stage frequency-changeable compressor is divided to simplify adjusting method, and to hiigh pressure stage frequency-changeable compressor
Working frequency accordingly adjusted, the specific method is as follows:
(a) the working frequency f of setting stepwise low-pressure stage frequency-changeable compressora: according to the set water temperature T of water tank and initial water temperature
T0Difference, the process of will heat up is divided into n sections, and n >=2, every section of limit of temperature rise is 2-15 DEG C, and preferably temperature rise is 5 DEG C, in each temperature rise section
Low-pressure stage frequency-changeable compressor uses different working frequency fai；
(b) situation, the working frequency f of each temperature rise section low-pressure stage frequency-changeable compressor are segmented according to the temperature rise of water tankaiBy equal difference
Ordered series of numbers distribution, obtains each temperature rise band frequency faiCalculation formula VII: fai=fg-(fg-fd) (i-1)/(n-1), calculation formula VII
In, fgFor the highest frequency value of low-pressure stage frequency-changeable compressor during whole service；fdFor low-pressure stage frequency conversion during whole service
The lowest frequency value of compressor；I indicates corresponding each warming-up section, i=1,2 ..., n since initial heating；
(c) controller detects outdoor environment temperature T1, the current actual water temperature T of water tank2, it is set by user it is specific with water when
Carve t0Coolant-temperature gage T is used with the water tank of setting, and sets the low-limit frequency f of low-pressure stage frequency-changeable compressordInitial value be 30Hz,
The highest frequency f of low-pressure stage frequency-changeable compressorgInitial value be 80Hz；
(d) controller calculates current time to set by user specifically with water moment t0Between time ts, and according to expression
The water temperature that water tank is calculated in formula III, expression formula V and calculation formula VII reaches t the time required to set temperature T operationj, such as | ts-
tj|≤5min shows that the working frequency setting of each temperature rise section low-pressure stage frequency-changeable compressor is reasonable, and low-pressure stage frequency-changeable compressor 1 is opened
Beginning work；Such as ts-tj>=5min, then by the highest frequency f of low-pressure stage frequency-changeable compressorg1Hz is reduced every time to calculate again, until
Meet | ts-tj|≤5min, such as fgStill backlog demand when being down to 30Hz, then postpone low-pressure stage frequency-changeable compressor and hiigh pressure stage
Frequency-changeable compressor start starting time, delay time calculate by low-pressure stage frequency-changeable compressor always by 30Hz frequency operation in terms of
It obtains；Such as ts-tj≤ -5min, then by the low-limit frequency f of low-pressure stage frequency-changeable compressord1Hz is improved every time to calculate again, until
Meet | ts-tj|≤5min, such as fdStill backlog demand when improving to 80Hz, Teat pump boiler whole service process mesolow
Grade frequency-changeable compressor keeps a fixed frequency, will improve every time 1Hz on the basis of 80Hz and calculate again, and want until meeting
It asks；The working frequency for the low-pressure stage frequency-changeable compressor being calculated such as occur is greater than the low-pressure stage frequency conversion pressure of Teat pump boiler setting
The operation upscale protection frequency of contracting machine, then low-pressure stage frequency-changeable compressor is run by the upscale protection frequency；Upscale protection frequency one
As be 100Hz；
(e) controller detects outdoor environment temperature T1, water tank actual temperature T2, it is calculated in best according to relational expression I
Between temperature T3, by the working frequency f for adjusting hiigh pressure stage frequency-changeable compressorb, detect medium temperature sensor practical intermediate warm
The optimum interstage temperature T that degree approach is calculated3Value.
In the technical scheme, the working frequency f of each temperature rise section low-pressure stage frequency-changeable compressor of the water tankai, can be right
Relational expression VI presses conic section fai=ai2+ bi+c is simplified.
In the technical scheme, the low-limit frequency f of the low-pressure stage frequency-changeable compressordInitial value range be 10-
40Hz, highest frequency fgInitial value range be 60-100Hz.
In the technical scheme, the low-pressure stage frequency-changeable compressor and hiigh pressure stage frequency-changeable compressor can be AC frequency conversion pressure
Contracting machine or DC speed regulation compressor.
Compared with prior art, the present invention its major advantage is: making twin-stage frequency conversion two-stage compression heat pump water heater entire
Dynamic optimization low-pressure stage compressor and high pressure stage compressor working frequency in operational process, make whole service process total energy consumption most
It is small.
Detailed description of the invention
Fig. 1 is the twin-stage frequency conversion two-stage compression heat pump water-heater system schematic diagram that the present invention is implemented.
Specific embodiment one
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings.Below with reference to
The embodiment of attached drawing description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
Twin-stage frequency conversion two-stage compression heat pump water heater includes low-pressure stage frequency-changeable compressor 1, low-pressure stage compressor exhaust temperature
Sensor 2, hiigh pressure stage frequency-changeable compressor 3, high pressure stage compressor exhaust gas temperature sensor 4, controller 5, tank sensor 6, storage
Water tank 7, condenser 8, hiigh pressure stage electric expansion valve 9, intercooler temperature sensor 10, intercooler temperature sensor
11, low-pressure stage electric expansion valve 12, evaporator 13 and outdoor temperature sensor 14；Low-pressure stage frequency-changeable compressor 1, intercooler
11, low-pressure stage electric expansion valve 12 and evaporator 13, which are sequentially connected in series to be connected to, forms a coolant loop, hiigh pressure stage frequency-changeable compressor 3,
Condenser 8, hiigh pressure stage electric expansion valve 9 and intercooler 11 are sequentially connected in series connection and form another coolant loop, low-pressure stage pressure
Contracting machine exhaust gas temperature sensor 2 incudes the temperature of 1 exhaust outlet of low-pressure stage frequency-changeable compressor, high pressure stage compressor delivery temperature sensing
Device 4 incudes the temperature of 3 exhaust outlet of hiigh pressure stage frequency-changeable compressor, and tank sensor 6 incudes the temperature of water tank 7, intercooler temperature
Spend the temperature that sensor 10 incudes intercooler 11, the outdoor temperature of 14 induction evaporation mode device 13 of outdoor temperature sensor, control
Device 5 respectively with low-pressure stage compressor exhaust temperature sensor 2, high pressure stage compressor exhaust gas temperature sensor 4, tank sensor 6,
Intercooler temperature sensor 10 and the electrical connection of 14 output end of outdoor temperature sensor, condenser 8 are located in water tank 7；Low pressure
The working frequency dynamic optimization adjusting method of grade frequency-changeable compressor 1 and hiigh pressure stage frequency-changeable compressor 3 is as follows:
(a) Teat pump boiler is established with outdoor environment temperature T1, water tank 7 actual temperature T2Variation, with best instantaneous efficiency
Than the heat pump refrigeration system medium temperature T that EER is target3Relational expression I: T3=F(T1,T2)；
(b) the instantaneous heating capacity q of Teat pump boiler and outdoor environment temperature T are established1, water tank 7 actual temperature T2And low-pressure stage
The working frequency f of frequency-changeable compressor 1aBetween II: q=E of relational expression (T1,T2,fa)；According to the available Heat Pump of relational expression II
The expression formula III of total heating capacity Q in hydrophone whole service time t:；
(c) the instantaneous energy consumption p of Teat pump boiler and outdoor environment temperature T are established1, water tank 7 actual temperature T2And low-pressure stage becomes
The working frequency f of frequency compressor 1aBetween IV: p=F of relational expression (T1,T2,fa)；According to the available Heat Pump of relational expression IV
The expression formula V of total energy consumption P in hydrophone whole service time t:；
(d) user sets the specific moment t with water0With water tank water temperature T, controller 5 detects the actual temperature of current water tank 7
T2, total heating capacity Q needed for calculating, using Teat pump boiler whole service process total energy consumption P minimum as target value, according to expression
The working frequency f of low-pressure stage frequency-changeable compressor 1 during whole service is calculated in formula III and expression formula VaWith runing time t
The relational expression VI: f of variationa=F (t), Teat pump boiler press VI dynamic regulation low-pressure stage frequency conversion of relational expression during whole service
The working frequency f of compressor 1a；
(e) controller 5 detects outdoor environment temperature T1, water tank 7 actual temperature T2, it is calculated most preferably according to relational expression I
Medium temperature T3, by the working frequency f for adjusting hiigh pressure stage frequency-changeable compressor 3b, make the reality of the detection of medium temperature sensor 11
Medium temperature approaches the optimum interstage temperature T being calculated3Value.
In the present embodiment, during Teat pump boiler whole service, relational expression VI is simplified to obtain a kind of point of temperature
The simplified adjusting method of section, the working frequency of discrete low-pressure stage frequency-changeable compressor 1 is spent, and to hiigh pressure stage frequency-changeable compressor 3
Working frequency is accordingly adjusted, and the specific method is as follows:
(a) the working frequency f of setting stepwise low-pressure stage frequency-changeable compressor 1a: according to the set water temperature T and initial water of water tank 7
Warm T0Difference, the process of will heat up is divided into n sections, and n >=2, every section of limit of temperature rise is 2-15 DEG C, and preferably temperature rise is 5 DEG C, in each temperature rise
Section low-pressure stage frequency-changeable compressor 1 uses different working frequency fai；
(b) situation, the working frequency f of each temperature rise section low-pressure stage frequency-changeable compressor 1 are segmented according to the temperature rise of water tank 7aiBy etc.
Difference column distribution obtains each temperature rise band frequency faiCalculation formula VII: fai=fg-(fg-fd) (i-1)/(n-1), calculation formula VII
In, fgFor the highest frequency value of low-pressure stage frequency-changeable compressor 1 during whole service；fdBecome for low-pressure stage during whole service
The lowest frequency value of frequency compressor 1；I indicates corresponding each warming-up section, i=1,2 ..., n since initial heating；
(c) controller 5 detects outdoor environment temperature T1, the current actual water temperature T of water tank 72, set by user specifically use water
Moment t0Coolant-temperature gage T is used with the water tank 7 of setting, and sets the low-limit frequency f of low-pressure stage frequency-changeable compressor 1dInitial value be
30Hz, the highest frequency f of low-pressure stage frequency-changeable compressor 1gInitial value be 80Hz；
(d) controller 5 calculates current time to set by user specifically with water moment t0Between time ts, and according to table
The water temperature that water tank 7 is calculated up to formula III, expression formula V and calculation formula VII reaches t the time required to set temperature T operationj, such as |
ts-tj|≤5min shows that the working frequency setting of each temperature rise section low-pressure stage frequency-changeable compressor 1 is reasonable, low-pressure stage frequency-changeable compressor 1
It starts to work；Such as ts-tj>=5min, then by the highest frequency f of low-pressure stage frequency-changeable compressor 1gIt reduces 1Hz every time to calculate again, directly
To satisfaction | ts-tj|≤5min, such as fgStill backlog demand when being down to 30Hz, then postpone low-pressure stage frequency-changeable compressor 1 and high pressure
Grade frequency-changeable compressor 3 starts the time of starting, and delay time calculates by low-pressure stage frequency-changeable compressor 1 always with 30Hz frequency fortune
Row is calculated；Such as ts-tj≤ -5min, then by the low-limit frequency f of low-pressure stage frequency-changeable compressor 1d1Hz is improved every time to count again
It calculates, until meeting | ts-tj|≤5min, such as fdStill backlog demand when improving to 80Hz, Teat pump boiler whole service process
Mesolow grade frequency-changeable compressor 1 keeps a fixed frequency, will improve every time 1Hz on the basis of 80Hz and calculate again, until
It meets the requirements；The working frequency for the low-pressure stage frequency-changeable compressor 1 being calculated such as occur is greater than the low pressure of Teat pump boiler setting
The operation upscale protection frequency of grade compressor 1, then low-pressure stage frequency-changeable compressor 1 is run by the upscale protection frequency；Upscale protection
Frequency is generally 100Hz；
(e) controller 5 detects outdoor environment temperature T1, water tank 7 actual temperature T2, it is calculated most preferably according to relational expression I
Medium temperature T3, by the working frequency f for adjusting hiigh pressure stage frequency-changeable compressor 3b, make the reality of the detection of medium temperature sensor 11
Medium temperature approaches the optimum interstage temperature T being calculated3Value；The working frequency f of hiigh pressure stage frequency-changeable compressor 3bLower limit protect
Shield frequency is 20Hz, and upscale protection frequency is 100Hz, namely works as and occur needing the working frequency f of hiigh pressure stage frequency-changeable compressor 3b
It when lower than 20Hz, runs by 20Hz, when needing to be higher than 100Hz, is run by 100Hz.
In the present embodiment, the working frequency f of each temperature rise section low-pressure stage frequency-changeable compressor 1 of the water tank 7ai, can be right
Relational expression VI presses conic section fai=ai2+ bi+c is simplified.
In the present embodiment, the low-limit frequency f of the low-pressure stage frequency-changeable compressor 1dInitial value range be 10-
40Hz, highest frequency fgInitial value range be 60-100Hz.
In the present embodiment, the low-pressure stage frequency-changeable compressor 1 and hiigh pressure stage frequency-changeable compressor 3 can be AC frequency conversion pressure
Contracting machine or DC speed regulation compressor.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
These embodiments can be carried out with a variety of variations, modification, replacement and deformation 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 (5)
1. a kind of twin-stage frequency conversion two-stage compression heat pump water heater frequency dynamic optimization and control method, twin-stage frequency conversion Two-stage Compression heat
Pump water heater includes low-pressure stage frequency-changeable compressor (1), low-pressure stage compressor exhaust temperature sensor (2), hiigh pressure stage frequency conversion compression
Machine (3), high pressure stage compressor exhaust gas temperature sensor (4), controller (5), tank sensor (6), water tank (7), condenser
(8), hiigh pressure stage electric expansion valve (9), intercooler temperature sensor (10), intercooler (11), low-pressure stage electronics are swollen
Swollen valve (12), evaporator (13) and outdoor temperature sensor (14)；It is low-pressure stage frequency-changeable compressor (1), intercooler (11), low
It arbitrarily downgrades electric expansion valve (12) and evaporator (13) is sequentially connected in series connection and forms a coolant loop, hiigh pressure stage frequency-changeable compressor (3),
Condenser (8), hiigh pressure stage electric expansion valve (9) and intercooler (11) are sequentially connected in series connection and form another coolant loop, low
Arbitrarily downgrade compressor exhaust temperature sensor (2) induction low-pressure stage frequency-changeable compressor (1) exhaust outlet temperature, high pressure stage compressor row
Gas temperature sensor (4) incudes the temperature of hiigh pressure stage frequency-changeable compressor (3) exhaust outlet, and tank sensor (6) incudes water tank (7)
Temperature, intercooler temperature sensor (10) incude the temperature of intercooler (11), outdoor temperature sensor (14) induction
The outdoor temperature of evaporator (13), controller (5) are compressed with low-pressure stage compressor exhaust temperature sensor (2), hiigh pressure stage respectively
Machine exhaust gas temperature sensor (4), tank sensor (6), intercooler temperature sensor (10) and outdoor temperature sensor
(14) output end is electrically connected, and condenser (8) is located in water tank (7)；It is characterized in that during Teat pump boiler whole service, it is right
The working frequency dynamic optimization of low-pressure stage frequency-changeable compressor (1) and hiigh pressure stage frequency-changeable compressor (3) is adjusted, and keeps Teat pump boiler whole
The total energy consumption of a operational process is minimum；The working frequency of low-pressure stage frequency-changeable compressor (1) and hiigh pressure stage frequency-changeable compressor (3) dynamic
Optimal regulation method is as follows:
(a) Teat pump boiler is established with outdoor environment temperature T1, water tank (7) actual temperature T2Variation, with best instantaneous Energy Efficiency Ratio
EER is the heat pump refrigeration system medium temperature T of target3Relational expression I: T3=F(T1,T2)；
(b) the instantaneous heating capacity q of Teat pump boiler and outdoor environment temperature T are established1, water tank (7) actual temperature T2And low-pressure stage becomes
The working frequency f of frequency compressor (1)aBetween II: q=E of relational expression (T1,T2,fa)；According to the available Heat Pump of relational expression II
The expression formula III of total heating capacity Q in hydrophone whole service time t:；
(c) the instantaneous energy consumption p of Teat pump boiler and outdoor environment temperature T are established1, water tank (7) actual temperature T2And low-pressure stage frequency conversion
The working frequency f of compressor (1)aBetween IV: p=F of relational expression (T1,T2,fa)；According to the available heat-pump hot-water of relational expression IV
The expression formula V of total energy consumption P in device whole service time t:；
(d) user sets the specific moment t with water0With water tank water temperature T, controller (5) detects the actual temperature of current water tank (7)
T2, total heating capacity Q needed for calculating, using Teat pump boiler whole service process total energy consumption P minimum as target value, according to expression
The working frequency f of low-pressure stage frequency-changeable compressor (1) during whole service is calculated in formula III and expression formula VaWith runing time
The relational expression VI: f of t variationa=F (t), Teat pump boiler are become during whole service by VI dynamic regulation low-pressure stage of relational expression
The working frequency f of frequency compressor (1)a；
(e) controller (5) detects outdoor environment temperature T1, water tank (7) actual temperature T2, it is calculated most preferably according to relational expression I
Medium temperature T3, by the working frequency f for adjusting hiigh pressure stage frequency-changeable compressor (3)b, detect medium temperature sensor (11)
The optimal medium temperature T that practical intermediate temperatures approach is calculated3Value.
2. twin-stage frequency conversion two-stage compression heat pump water heater frequency dynamic optimization according to claim 1 and control method,
It is characterized in that during Teat pump boiler whole service, is simplified to obtain one kind to relational expression VI and divide temperature section, discontinuous
The working frequency of low-pressure stage frequency-changeable compressor (1) simplify adjusting method, and to the working frequency of hiigh pressure stage frequency-changeable compressor (3)
It is accordingly adjusted, the specific method is as follows:
(a) the working frequency f of setting stepwise low-pressure stage frequency-changeable compressor (1)a: according to the set water temperature T and initial water of water tank (7)
Warm T0Difference, the process of will heat up is divided into n sections, and n >=2, every section of limit of temperature rise is 2-15 DEG C, and preferably temperature rise is 5 DEG C, in each temperature rise
Section low-pressure stage frequency-changeable compressor (1) uses different working frequency fai；
(b) situation, the working frequency f of each temperature rise section low-pressure stage frequency-changeable compressor (1) are segmented according to the temperature rise of water tank (7)aiBy etc.
Difference column distribution obtains each temperature rise band frequency faiCalculation formula VII: fai=fg-(fg-fd) (i-1)/(n-1), calculation formula VII
In, fgFor the highest frequency value of low-pressure stage frequency-changeable compressor (1) during whole service；fdFor low-pressure stage during whole service
The lowest frequency value of frequency-changeable compressor (1)；I indicates corresponding each warming-up section, i=1,2 ..., n since initial heating；
(c) controller (5) detects outdoor environment temperature T1, the current actual water temperature T of water tank (7)2, set by user specifically use water
Moment t0Coolant-temperature gage T is used with the water tank (7) of setting, and sets the low-limit frequency f of low-pressure stage frequency-changeable compressor (1)dInitial value
For 30Hz, the highest frequency f of low-pressure stage frequency-changeable compressor (1)gInitial value be 80Hz；
(d) controller (5) calculates current time to set by user specifically with water moment t0Between time ts, and according to expression
The water temperature that water tank (7) is calculated in formula III, expression formula V and calculation formula VII reaches t the time required to set temperature T operationj, such as |
ts-tj|≤5min shows that the working frequency setting of each temperature rise section low-pressure stage frequency-changeable compressor (1) is reasonable, low-pressure stage frequency conversion compression
Machine 1 is started to work；Such as ts-tj>=5min, then by the highest frequency f of low-pressure stage frequency-changeable compressor (1)g1Hz is reduced every time to count again
It calculates, until meeting | ts-tj|≤5min, such as fgStill backlog demand when being down to 30Hz, then postpone low-pressure stage frequency-changeable compressor
(1) and hiigh pressure stage frequency-changeable compressor (3) starts the time started, and delay time calculates begins by low-pressure stage frequency-changeable compressor (1)
It is calculated eventually with the operation of 30Hz frequency；Such as ts-tj≤ -5min, then by the low-limit frequency f of low-pressure stage frequency-changeable compressor (1)dOften
Secondary raising 1Hz is calculated again, until meeting | ts-tj|≤5min, such as fdStill backlog demand when improving to 80Hz, Heat Pump
Low-pressure stage frequency-changeable compressor (1) keeps a fixed frequency during hydrophone whole service, will mention every time on the basis of 80Hz
High 1Hz is calculated again, until meeting the requirements；The working frequency for the low-pressure stage frequency-changeable compressor (1) being calculated such as occur is greater than
The operation upscale protection frequency of the low-pressure stage frequency-changeable compressor (1) of Teat pump boiler setting, then low-pressure stage frequency-changeable compressor (1) is pressed
Upscale protection frequency operation；Upscale protection frequency is 100Hz；
(e) controller (5) detects outdoor environment temperature T1, water tank (7) actual temperature T2, it is calculated most preferably according to relational expression I
Medium temperature T3, by the working frequency f for adjusting hiigh pressure stage frequency-changeable compressor (3)b, detect medium temperature sensor (11)
The optimal medium temperature T that practical intermediate temperatures approach is calculated3Value.
3. twin-stage frequency conversion two-stage compression heat pump water heater frequency dynamic optimization according to claim 2 and control method,
It is further characterized in that the working frequency f of each temperature rise section low-pressure stage frequency-changeable compressor (1) of the water tank (7)ai, can be to relational expression VI
By conic section fai=ai2+ bi+c is simplified.
4. according to claim 1, the optimization of twin-stage frequency conversion two-stage compression heat pump water heater frequency dynamic described in 2,3 and controlling party
Method, it is characterised in that the low-limit frequency f of the low-pressure stage frequency-changeable compressor (1)dInitial value range be 10-40Hz, highest
Frequency fgInitial value range be 60-100Hz.
5. according to claim 1, the optimization of twin-stage frequency conversion two-stage compression heat pump water heater frequency dynamic described in 2,3 and controlling party
Method, it is characterised in that the low-pressure stage frequency-changeable compressor (1) and hiigh pressure stage frequency-changeable compressor (3) be AC frequency conversion compressor or
DC speed regulation compressor.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711021478.2A CN107906752B (en) | 2017-10-27 | 2017-10-27 | The optimization of twin-stage frequency conversion two-stage compression heat pump water heater frequency dynamic and control method |
| PCT/CN2017/115120 WO2019080278A1 (en) | 2017-10-27 | 2017-12-08 | Method for dynamically optimizing and controlling frequency two-stage variable frequency two-stage compression heat pump water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711021478.2A CN107906752B (en) | 2017-10-27 | 2017-10-27 | The optimization of twin-stage frequency conversion two-stage compression heat pump water heater frequency dynamic and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107906752A CN107906752A (en) | 2018-04-13 |
| CN107906752B true CN107906752B (en) | 2019-06-14 |
Family
ID=61842866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711021478.2A Active CN107906752B (en) | 2017-10-27 | 2017-10-27 | The optimization of twin-stage frequency conversion two-stage compression heat pump water heater frequency dynamic and control method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107906752B (en) |
| WO (1) | WO2019080278A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201463389U (en) * | 2009-07-30 | 2010-05-12 | 天津商业大学 | Two-stage compression steam-type refrigeration system for high-pressure stage air supplement |
| CN104501421A (en) * | 2014-12-12 | 2015-04-08 | 顺德职业技术学院 | Control method of variable-frequency two-stage compressive heat pump water heater |
| JP2015148407A (en) * | 2014-02-07 | 2015-08-20 | パナソニックＩｐマネジメント株式会社 | Refrigeration device |
| WO2015158174A1 (en) * | 2014-04-15 | 2015-10-22 | 珠海格力电器股份有限公司 | Refrigeration device |
| CN105962005A (en) * | 2016-05-09 | 2016-09-28 | 顺德职业技术学院 | Energy-saving control method of twin-stage compression type heat pump vacuum freeze drying combined device |
-
2017
- 2017-10-27 CN CN201711021478.2A patent/CN107906752B/en active Active
- 2017-12-08 WO PCT/CN2017/115120 patent/WO2019080278A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201463389U (en) * | 2009-07-30 | 2010-05-12 | 天津商业大学 | Two-stage compression steam-type refrigeration system for high-pressure stage air supplement |
| JP2015148407A (en) * | 2014-02-07 | 2015-08-20 | パナソニックＩｐマネジメント株式会社 | Refrigeration device |
| WO2015158174A1 (en) * | 2014-04-15 | 2015-10-22 | 珠海格力电器股份有限公司 | Refrigeration device |
| CN104501421A (en) * | 2014-12-12 | 2015-04-08 | 顺德职业技术学院 | Control method of variable-frequency two-stage compressive heat pump water heater |
| CN105962005A (en) * | 2016-05-09 | 2016-09-28 | 顺德职业技术学院 | Energy-saving control method of twin-stage compression type heat pump vacuum freeze drying combined device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107906752A (en) | 2018-04-13 |
| WO2019080278A1 (en) | 2019-05-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108626923B (en) | Control structure and control method of air conditioning system | |
| CN104633942B (en) | Frequency conversion air injection enthalpy increasing heat pump water heater frequency is adjusted and control method | |
| CN104501421B (en) | A kind of control method of frequency conversion two-stage compression heat pump water heater | |
| CN104613651B (en) | Frequency conversion air source hot pump water heater frequency adjustment method | |
| CN107560255B (en) | Heat pump unit and its control method | |
| CN103534534A (en) | Heat source system and number-of-machines control method for heat source system | |
| CN107120799A (en) | A kind of water system multi-connected machine control method and system | |
| CA2618397A1 (en) | Heat pump apparatus and method | |
| CN107763857A (en) | Frequency conversion air injection enthalpy increasing heat pump water heater frequency dynamic optimizes and control method | |
| CN106468477A (en) | A kind of solar heat-pump water heater and control method | |
| CN104279805A (en) | Method for controlling running of water-cooled screw-type refrigerating unit | |
| CN107906760A (en) | Frequency conversion heat pump water heater compressor frequency dynamic optimization method | |
| CN102725596B (en) | Heat pump system | |
| CN107560179A (en) | Frequency conversion air injection enthalpy increasing heat pump water heater dynamic heat compressor frequency optimization method | |
| CN109539380B (en) | Method for controlling frequency of compressor of heat pump water heater | |
| CN110595123A (en) | Control method of electronic expansion valve in air source variable frequency heat pump system | |
| CN107763872A (en) | Twin-stage frequency conversion two-stage compression heat pump water heater dynamic heat frequency optimization and control method | |
| CN107883571A (en) | Frequency conversion two-stage compression heat pump water heater frequency dynamic optimizes and control method | |
| CN107940842A (en) | Frequency conversion heat pump water heater dynamic heat compressor frequency optimization method | |
| CN107906752B (en) | The optimization of twin-stage frequency conversion two-stage compression heat pump water heater frequency dynamic and control method | |
| CN104748293A (en) | Method for controlling air conditioning super-cooling degree through pressure sensor | |
| CN107676973A (en) | Frequency conversion two-stage compression heat pump water heater dynamic heat frequency optimization and control method | |
| CN110030777A (en) | A kind of control method for realizing best condensing pressure | |
| CN114358417A (en) | Energy-saving consumption-reducing operation control method for industrial circulating cooling water system | |
| CN111336692B (en) | Solar heat pump water heater control method and solar heat pump water heater |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |