CN104633942B - Frequency conversion air injection enthalpy increasing heat pump water heater frequency is adjusted and control method - Google Patents
Frequency conversion air injection enthalpy increasing heat pump water heater frequency is adjusted and control method Download PDFInfo
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Abstract
The present invention relates to a kind of regulation of frequency conversion air injection enthalpy increasing heat pump water heater frequency and control method, feature is that its regulating step is：（a）When user selects quick mode, Teat pump boiler detects outdoor environment temperature T1With water tank actual temperature T2Temperature, with water tank actual water temperature T2Compressor frequency is adjusted for feedback target；（b）When user selects energy saver mode, controller detects current water tank actual temperature T2, calculate with required total quantity of heat production in water time t；（c）According to foregoing（a）、（b）When affiliated frequency adjustment method is operated, compressor frequency, the outdoor environment temperature T obtained according to experiment1, water tank actual temperature T2, the aperture of main electric expansion valve, auxiliary electric expansion valve is adjusted with optimal Energy Efficiency Ratio；（d）The highest frequency that Teat pump boiler allows can be determined by the method for experiment and is preset at functional expression or list mode in controller.Its advantage is：Make frequency conversion air injection enthalpy increasing heat pump water heater as far as possible in the frequency work close to optimal Energy Efficiency Ratio Frequency point, the aperture by target of optimal Energy Efficiency Ratio to main and auxiliary electric expansion valve is controlled, and saves the energy.
Description
Technical field
The present invention relates to heat-pump water heater control method, particularly a kind of frequency conversion air injection enthalpy increasing heat pump water heater frequency regulation
And control method.
Background technology
Air injection enthalpy-increasing technology is the effective way for solving heating capacity and Energy Efficiency Ratio under air source hot pump water heater low temperature environment,
With the development of converter technique, frequency conversion air injection enthalpy increasing heat pump water heater gradually starts application.At present, frequency conversion air injection enthalpy-increasing heat pump
The compressor frequency adjusting method that water heater is used is to be used as feedback pair using the difference of water tank target temperature and water tank real-time temperature
As that is, when both temperature difference are more than a certain value, compressor runs to improve quantity of heat production with high-frequency as far as possible（Heating operation）,
Shorten the heat time, when both temperature difference are less than a certain value, dynamic adjustment compressor frequency makes water tank temperature stable in target temperature
In the range of degree（Stable operation）, the aperture control of the main electric expansion valve of its refrigeration system and auxiliary electric expansion valve is with optimal Energy Efficiency Ratio
It is controlled for target.Can be with from the dynamic relationship figure of the air source heat pump quantity of heat production shown in Fig. 1, Energy Efficiency Ratio and compressor frequency
Find out, air source hot pump water heater quantity of heat production is improved and increased with compressor frequency, but its Energy Efficiency Ratio trend in parabolic variation,
When compressor frequency is higher than a certain frequency, Energy Efficiency Ratio is improved and declined with compressor frequency, when less than this frequency, efficiency
Decline than declining with compressor frequency, it is clear that in current frequency adjustment method, air source hot pump water heater is run in heating
During remote off-target Energy Efficiency Ratio Frequency point, and in stable operation, similarly off-target Energy Efficiency Ratio Frequency point so that become
The power savings advantages of frequency technology fail to give full play to.Actually user using Teat pump boiler when, the most of the time need not and
When use, but open Teat pump boiler in advance, in other words when user is not to be badly in need of hot water, quantity of heat production and efficiency should be taken into account
Than adjusting compressor frequency, on the premise of user's heat demand is met, as far as possible to approach optimal Energy Efficiency Ratio Frequency point frequency
Rate is run.But user's uses heat demand dynamic change, and the optimal Energy Efficiency Ratio Frequency point of Teat pump boiler is also with environment temperature and water
Case temperature dynamic changes.On the other hand, in frequency dynamic change, heat pump quantity of heat production dynamic change, the main electronics of refrigeration system
Expansion valve and auxiliary electric expansion valve must have the control method adapted to therewith just system has been given play to better performance.
The content of the invention
The purpose of the present invention is a kind of frequency conversion air injection enthalpy increasing heat pump water heater frequency for overcoming the deficiencies in the prior art and providing
Rate is adjusted and control method, and it can be dynamic according to user's heat demand and Teat pump boiler outdoor environment temperature, water tank actual temperature
State adjusts frequency-changeable compressor frequency, while adjusting the aperture of the main electric expansion valve of refrigeration system and auxiliary electric expansion valve, makes heat pump
Water heater is run as close possible to optimal Energy Efficiency Ratio, realizes energy-conservation purpose.
In order to achieve the above object, the present invention is achieved in that it is that frequency conversion air injection enthalpy increasing heat pump water heater frequency is adjusted
Section and control method, it is characterised in that Teat pump boiler has quick and two kinds of operational modes of energy-conservation, regulating step is as follows：
（a）When user selects quick mode, Teat pump boiler passes through controller, outdoor environment temperature sensor and water tank
Temperature sensor detects outdoor environment temperature T1With water tank actual temperature T2Temperature, with water tank actual water temperature T2For feedback pair
As compressor frequency is adjusted, as water tank actual water temperature T2With set water temperature T-phase difference it is larger when, Teat pump boiler is with highest
Frequency works, as water tank actual water temperature T2During close to set water temperature T, Teat pump boiler is reduced to optimal Energy Efficiency Ratio Frequency point work
Make, this optimal Energy Efficiency Ratio Frequency point is by according to the optimal Energy Efficiency Ratio Frequency point that draws of experiment and outdoor environment temperature T1, water tank it is real
Border temperature T2Relational expression determine and with outdoor environment temperature T1, water tank actual temperature T2Dynamic change, as water tank actual water temperature T2
Shut down when reaching design temperature T；
（b）When user selects energy saver mode, user is inputted with water time t and set water temperature T, controller of heat pump water heater
Detect current water tank actual temperature T2, calculate with required total quantity of heat production, the heat-pump hot-water according to built in controller in water time t
The optimal Energy Efficiency Ratio Frequency point of device and outdoor environment temperature T1, water tank actual temperature T2Relational expression and Teat pump boiler instantaneously produce
Heat and outdoor environment temperature T1, water tank actual temperature T2Relational expression, prediction calculates and being operated in by optimal Energy Efficiency Ratio Frequency point
Reach with quantity of heat production during water time t, such as predict that total quantity of heat production is more than required total quantity of heat production, then after Teat pump boiler start all the time
By according to the outdoor environment temperature T detected in real time1, water tank actual temperature T2And the optimal Energy Efficiency Ratio Frequency point calculated carries out work
Make, until reaching that set water temperature T is shut down；Such as predict that total quantity of heat production is less than required total quantity of heat production, controller is then according to required total yield
Heat and the ratio for predicting total quantity of heat production, improve actual operating frequency, so as to improve on the basis of optimal Energy Efficiency Ratio Frequency point
Teat pump boiler quantity of heat production, reaches user design temperature T in setting time t, so taken into account Teat pump boiler quantity of heat production and
Energy Efficiency Ratio, so as to realize maximum energy-conservation；
（c）According to foregoing（a）、（b）When affiliated frequency adjustment method is operated, according to experiment obtain with compression
Unit frequency, outdoor environment temperature T1, water tank actual temperature T2Change, main electric expansion valve, auxiliary electricity by target of optimal Energy Efficiency Ratio
The aperture combination table of sub- expansion valve, the aperture to main electric expansion valve, auxiliary electric expansion valve is adjusted；
（d）The highest frequency that Teat pump boiler allows is with outdoor environment temperature T1With water tank actual temperature T2And change, can be with
Determined and be preset at functional expression or list mode in controller by the method for experiment；Examined simultaneously by exhaust gas temperature sensor
The delivery temperature T of measured compressed machine3To limit compressor maximum operating frequency, to protect compressor；When compressor is according to foregoing
（a）、（b）When described frequency adjustment method is operated, in the delivery temperature T of compressor3During more than allowable value, compressor
Working frequency is automatically lowered to the delivery temperature T of compressor3The Frequency point work of allowable value；Similarly, since compressor can not
Long-term to be worked under the low frequency that compressor is limited, when compressor actual operating frequency is less than the limiting frequency, compressor will
Worked with the limiting frequency, so as to ensure reliability and security that Teat pump boiler is used.
The compressor is frequency-changeable compressor, variable conpacitance compressor or DC speed regulation compressor.
Major advantage is the present invention compared with prior art：Make frequency conversion air injection enthalpy increasing heat pump water heater as far as possible close
The frequency work of optimal Energy Efficiency Ratio Frequency point, while the aperture by target of optimal Energy Efficiency Ratio to main and auxiliary electric expansion valve is carried out
Control, saves the energy.
Brief description of the drawings
Fig. 1 is the pass of frequency conversion air injection enthalpy-increasing air source heat pump quantity of heat production, Energy Efficiency Ratio and compressor frequency that the present invention is implemented
System's figure；
Fig. 2 is the frequency conversion injection enthalpy-increasing air source heat pump schematic diagram of the present invention；
Fig. 3 is regulation and the control method control block diagram of the present invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings.Below with reference to
The embodiment of accompanying drawing description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
Air source hot pump water heater include compressor 1, exhaust gas temperature sensor 2, controller 3, water tank temperature sensor 4,
Storage tank 5, condenser 6, auxiliary electric expansion valve 7, economizer 8, main electric expansion valve 9, evaporator 10 and outdoor temperature sensor
11.In the present embodiment, compressor 1 is frequency-changeable compressor, also can be according to compressor of the actual conditions compressor 1 using varying capacity
Or use DC speed regulation compressor；Frequency conversion air injection enthalpy increasing heat pump water heater can be using water, underground heat as thermal source.
Trapped energy theory and the working frequency f of compressor 1, outdoor environment temperature T1, water tank actual temperature T2Relational expression really
It is fixed：Different frequency f, different outdoor environment temperature T are obtained by the Teat pump boiler performance test of specific a certain model1And difference
Water tank actual temperature T2And the trapped energy theory under optimal main electric expansion valve 9, the aperture of auxiliary electric expansion valve 7, by mathematics side
Method returns and obtains trapped energy theory and frequency f, outdoor environment temperature T1, water tank actual temperature T2Relational expression（1）：EER=F(f、
T1、T2) and main electric expansion valve 9, auxiliary electric expansion valve 7 with frequency f, outdoor environment temperature T1, water tank actual temperature T2Most
Good aperture control table, and then the corresponding Frequency point f of optimal Energy Efficiency Ratio can be obtained0With outdoor environment temperature T1, water tank actual temperature
T2Relational expression（2）：f0= F(T1、T2) and corresponding main electric expansion valve 9, the aperture control table of auxiliary electric expansion valve 7, with
This obtains different frequency f, different outdoor environment temperature T simultaneously1With different water tank actual temperature T2Under instantaneous quantity of heat production q, pass through
Mathematical method returns and obtains instantaneous quantity of heat production q and frequency f, outdoor environment temperature T1, water tank actual temperature T2Relational expression（3）：q=
F(f、T1、T2).Its above-mentioned 3 relational expression difference of the Teat pump boiler of different model specification.
As shown in Figures 1 to 3, Teat pump boiler of the invention has quick and two kinds of operational modes of energy-conservation, comprises the following steps：
（a）After user selects quick mode and sets water tank temperature T, Teat pump boiler passes through controller 3, outdoor environment
Temperature sensor 11 and water tank temperature sensor 4 collect outdoor environment temperature T1With water tank actual temperature T2, with the actual water of water tank
Warm T2The frequency of compressor 1 is adjusted for feedback target, as Δ T（Δ T=set water temperature T- water tank actual water temperatures T2）≥5℃
When, Teat pump boiler is worked with highest frequency（Typically≤100Hz）；The highest frequency that Teat pump boiler allows is with outdoor environment temperature
Spend T1With water tank actual temperature T2And change, it can be determined by the method for experiment and control is preset at functional expression or list mode
In device processed；As Δ T<At 5 DEG C, Teat pump boiler gradually reduces working frequency to optimal Energy Efficiency Ratio Frequency point f0Work, this is optimal
Energy Efficiency Ratio Frequency point f0As the optimal Energy Efficiency Ratio Frequency point f built in controller 30With outdoor environment temperature T1, water tank actual temperature T2
Relational expression（2）It is determined that, and obtained outdoor is detected by outdoor environment temperature sensor 11 and water tank temperature sensor 4 at any time
Environment temperature T1And water tank actual temperature T2Dynamic change；As water tank actual temperature T2Shut down when reaching design temperature T；
（b）When user selects energy saver mode, user is inputted with water time t and set water temperature T, controller of heat pump water heater
Detect current water tank actual temperature T2, calculate with required total quantity of heat production Q, the Heat Pump according to built in controller 3 in water time t
The corresponding Frequency point f of the optimal Energy Efficiency Ratio of hydrophone0With outdoor environment temperature T1, water tank actual temperature T2Relational expression（2）And it is instantaneous
Quantity of heat production q and frequency f, outdoor environment temperature T1, water tank actual temperature T2Relational expression（3）Prediction calculates the full mistake of time period
Journey presses total quantity of heat production Q that optimal Energy Efficiency Ratio Frequency point works1, such as Q1>=Q, shows whole by optimal Energy Efficiency Ratio Frequency point work energy
User's use requirement is met, then the outdoor environment temperature T detected in real time after Teat pump boiler start1, water tank actual temperature T2And root
According to optimal Energy Efficiency Ratio Frequency point f0With outdoor environment temperature T1, water tank actual temperature T2Relational expression（2）The optimal efficiency calculated
Than Frequency point f0Regulation compressor operating frequency is operated in real time, until reaching that set water temperature T is shut down；Prediction calculates total heat production
Measure Q1When, the outdoor environment temperature T that controller during controller default user input operation is detected1, water tank actual temperature T2For
The initial value that controller is calculated；Such as Q1<Q, illustrates Teat pump boiler by optimal Energy Efficiency Ratio Frequency point f0Work, its quantity of heat production is inadequate,
Need to be in optimal Energy Efficiency Ratio Frequency point f0On the basis of frequency is brought up into f1, Teat pump boiler quantity of heat production is improved, could be in setting
With user's design temperature is reached in water time t, Teat pump boiler quantity of heat production and Energy Efficiency Ratio are so taken into account, so as to realize maximum journey
The energy-conservation of degree.To determine frequency f1, following simplified way can be used：
1）In optimal Energy Efficiency Ratio Frequency point f0Neighbouring frequency range, the instantaneous quantity of heat production of Teat pump boiler and frequency f1Similar to
Proportional relationship；
2）Prediction calculates overall process and presses optimal Energy Efficiency Ratio Frequency point f0Total quantity of heat production Q of operation1, pull-in frequency coefficient k, k=
Total quantity of heat production Q/ is needed to predict total quantity of heat production Q1；
3）The actual operating frequency f of compressor 11The optimal Energy Efficiency Ratio Frequency point f of=coefficient of frequency k*0。
（c）According to foregoing（a）、（b）When affiliated frequency adjustment method is operated, according to experiment obtain with compression
Unit frequency, outdoor environment temperature T1, water tank actual temperature T2Change, it is main electric expansion valve 9 by target of optimal Energy Efficiency Ratio, auxiliary
The aperture combination table of electric expansion valve 7, the aperture to main electric expansion valve 9, auxiliary electric expansion valve 7 is adjusted；
（d）The highest frequency that Teat pump boiler allows is with outdoor environment temperature T1With water tank actual temperature T2And change, can be with
Determined and be preset at functional expression or list mode in controller by the method for experiment；Pass through exhaust gas temperature sensor 2 simultaneously
Detect the delivery temperature T of compressor 13To limit compressor maximum operating frequency, to protect compressor 1；When compressor 1 is in basis
It is foregoing（a）、（b）When described frequency adjustment method is operated, in the delivery temperature T of compressor 13During more than allowable value,
The working frequency of compressor 1 is automatically lowered to the delivery temperature T of compressor 13The Frequency point work of allowable value；Similarly, since pressure
Contracting machine 1 can not work under the low frequency that compressor is limited for a long time, be less than the limiting frequency in the actual operating frequency of compressor 1
When, compressor 1 will be worked with the limiting frequency, so as to ensure reliability and security that Teat pump boiler is used.
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 changes, modification in the case of departing from the principle and objective of the present invention, replace and deform, this
The scope of invention is limited by claim and its equivalent.
Claims (2)
1. a kind of frequency conversion air injection enthalpy increasing heat pump water heater frequency regulation and control method, it is characterised in that Teat pump boiler has quickly
With two kinds of operational modes of energy-conservation, regulating step is as follows：
（a）When user selects quick mode, Teat pump boiler passes through controller（3）, outdoor environment temperature sensor（11）With
Water tank temperature sensor（4）Detect outdoor environment temperature T1With water tank actual temperature T2Temperature, with water tank actual water temperature T2For
Compressor frequency is adjusted feedback target, as water tank actual water temperature T2With set water temperature T-phase difference it is larger when, Teat pump boiler
Worked with highest frequency, as water tank actual water temperature T2During close to set water temperature T, Teat pump boiler gradually reduces working frequency to most
The work of good Energy Efficiency Ratio Frequency point, this optimal Energy Efficiency Ratio Frequency point is by the optimal Energy Efficiency Ratio Frequency point and outdoor ring that are drawn according to experiment
Border temperature T1, water tank actual temperature T2Relational expression determine and with outdoor environment temperature T1, water tank actual temperature T2Dynamic change,
As water tank actual water temperature T2Shut down when reaching design temperature T；
（b）When user selects energy saver mode, user is inputted with water time t and set water temperature T, controller of heat pump water heater detection
Current water tank actual temperature T2, calculate with required total quantity of heat production in water time t, according to the optimal Energy Efficiency Ratio frequency of Teat pump boiler
Point and outdoor environment temperature T1, water tank actual temperature T2Relational expression and the instantaneous quantity of heat production of Teat pump boiler and outdoor environment temperature
Spend T1, water tank actual temperature T2Relational expression, prediction calculated when being operated in arrival water time t by optimal Energy Efficiency Ratio Frequency point
Total quantity of heat production, such as predict that total quantity of heat production is more than required total quantity of heat production, then pressed all the time according to inspection in real time after Teat pump boiler start
The outdoor environment temperature T of survey1, water tank actual temperature T2And the optimal Energy Efficiency Ratio Frequency point calculated is operated, set until reaching
Determine water temperature T shutdown；Such as predict that total quantity of heat production is less than required total quantity of heat production, controller is then according to required total quantity of heat production and prediction total yield
The ratio of heat, improves actual operating frequency on the basis of optimal Energy Efficiency Ratio Frequency point, reaches that user sets in setting time t
Constant temperature degree T；
（c）According to foregoing（a）、（b）When affiliated frequency adjustment method is operated, according to experiment obtain with compressor frequency
Rate, outdoor environment temperature T1, water tank actual temperature T2Change, the main electric expansion valve by target of optimal Energy Efficiency Ratio（9）, auxiliary electricity
Sub- expansion valve（7）Aperture combination table, to main electric expansion valve（9）, auxiliary electric expansion valve（7）Aperture be adjusted；
（d）The highest frequency that Teat pump boiler allows is with outdoor environment temperature T1With water tank actual temperature T2And change, it can pass through
The method of experiment determines and is preset at controller with functional expression or list mode（3）It is interior；Pass through exhaust gas temperature sensor simultaneously（2）
Detect compressor（1）Delivery temperature T3To limit compressor maximum operating frequency, to protect compressor（1）；Work as compressor（1）
According to foregoing（a）、（b）When described frequency adjustment method is operated, in compressor（1）Delivery temperature T3More than permission
During limit value, compressor（1）Working frequency is automatically lowered to compressor（1）Delivery temperature T3The Frequency point work of allowable value；
Similarly, since compressor（1）It can not be worked for a long time under the low frequency that compressor is limited, in compressor（1）Actual operating frequency
Less than compressor limit low frequency when, compressor（1）The low frequency limited with compressor is worked.
2. frequency conversion air injection enthalpy increasing heat pump water heater frequency regulation according to claim 1 and control method, it is characterised in that
The compressor（1）For frequency-changeable compressor, variable conpacitance compressor or DC speed regulation compressor.
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| CN107560179A (en) * | 2017-10-27 | 2018-01-09 | 顺德职业技术学院 | Frequency conversion air injection enthalpy increasing heat pump water heater dynamic heat compressor frequency optimization method |
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