CN104833102A - Frequency control method and system for electric frequency conversion heat pump hot water machine compressor - Google Patents
Frequency control method and system for electric frequency conversion heat pump hot water machine compressor Download PDFInfo
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- CN104833102A CN104833102A CN201510268372.7A CN201510268372A CN104833102A CN 104833102 A CN104833102 A CN 104833102A CN 201510268372 A CN201510268372 A CN 201510268372A CN 104833102 A CN104833102 A CN 104833102A
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- 238000010438 heat treatment Methods 0.000 description 6
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- 239000003507 refrigerant Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
- F24D19/1054—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water the system uses a heat pump
-
- 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
- F24H15/219—Temperature of the water after heating
-
- 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
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
- F24H4/04—Storage heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F24H15/40—Control of fluid heaters characterised by the type of controllers
- F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
- F24H15/421—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a frequency control method and system for an electric frequency conversion heat pump hot water machine compressor. The method includes the steps that the outlet water temperature of a heat exchanger and the water tank temperature of a water tank are detected; the set temperature of the outlet water of the heat exchanger is generated according to the temperature of the water tank; control over the frequency of the frequency conversion compressor is conducted according to the outlet water temperature and the set outlet water temperature of the heat exchanger. According to the frequency control method and system of the frequency conversion heat pump hot water machine compressor, the mode that control over the frequency of the compressor through the outlet water temperature of the heat exchanger is provided, the operation frequency of the frequency conversion compressor can be lowered effectively, the unit operation energy efficiency is improved, and the reliability of the compressor is guaranteed on the condition that the outlet water temperature is constant is guaranteed.
Description
Technical field
The present invention relates to heat pump water-heating machine technical field, particularly relate to a kind of control method for frequency and system of frequency conversion heat pump hot water machine compressor.
Background technology
Heat pump water-heating machine, as a kind of equipment of high-efficient energy-saving environment friendly, obtains increasingly extensive application at home and abroad in recent years.Along with the development of converter technique, frequency conversion heat pump hot water machine is shown up prominently.With determine compared with frequency heat pump water-heating machine, frequency conversion heat pump hot water machine has that heating capacity is large, efficiency advantages of higher, and at low temperature environment temperature, its advantage is more obvious especially.
At present, the control method for frequency that frequency conversion heat pump hot water machine compressor adopts is using the difference of water tank target temperature and water tank real-time temperature as feedback target, namely when both temperature difference are greater than a certain value, compressor runs with high-frequency to improve quantity of heat production as much as possible, shortens the heat time; When both temperature difference are less than a certain value, dynamic conditioning compressor frequency, in order to ensure that water tank temperature is stabilized in target temperature range, now the running frequency of compressor is lower usually.
But, the heat that usual frequency conversion heat pump hot water machine produces improves along with contracting unit frequency and increases, but its Energy Efficiency Ratio parabolically variation tendency, namely when compressor frequency is higher than a certain frequency, the Energy Efficiency Ratio of heat pump water-heating machine improves with compressor frequency and declines, when lower than this frequency, the Energy Efficiency Ratio of heat pump water-heating machine declines with compressor frequency and declines.As can be seen here, the existing mode controlled by the frequency of the temperature in water tank to frequency conversion heat pump hot water machine compressor, cannot ensure the reliability of compressor, the power savings advantages of frequency conversion heat pump water heater fails to give full play to.
Summary of the invention
Object of the present invention is intended to solve one of above-mentioned technical problem at least to a certain extent.
For this reason, first object of the present invention is the control method for frequency proposing a kind of frequency conversion heat pump hot water machine compressor.The mode that the method is controlled by the frequency of leaving water temperature to compressor of heat exchanger, effectively can reduce the running frequency of frequency-changeable compressor, promotes unit operational energy efficiency, in guarantee effluent temperature constancy situation, ensures the reliability of compressor.
Second object of the present invention is the frequency control system proposing a kind of frequency conversion heat pump hot water machine compressor.
To achieve these goals, the control method for frequency of the frequency conversion heat pump hot water machine compressor of first aspect present invention embodiment, comprising: detect the leaving water temperature of heat exchanger and the water tank temperature of water tank; The water outlet design temperature of described heat exchanger is generated according to described water tank temperature; And control according to the leaving water temperature of described heat exchanger and the frequency of water outlet design temperature to frequency-changeable compressor.
According to the control method for frequency of the frequency conversion heat pump hot water machine compressor of the embodiment of the present invention, first the leaving water temperature of heat exchanger and the water tank temperature of water tank is detected, then the water outlet design temperature of heat exchanger is generated according to water tank temperature, and control according to the leaving water temperature of heat exchanger and the frequency of water outlet design temperature to frequency-changeable compressor, this embodiment proposes a kind of mode controlled by the frequency of leaving water temperature to compressor of heat exchanger, effectively can reduce the running frequency of frequency-changeable compressor, promote unit operational energy efficiency, in guarantee effluent temperature constancy situation, ensure the reliability of compressor.
Wherein, in one embodiment of the invention, described water outlet design temperature is generated by following formula,
T1S=a1*a2*a3*T5+b, wherein, T1S is water outlet design temperature, and a1 is water-water heat exchanger correction factor in water tank, and a2 is source pump capacity correction coefficient, and a3 is corrected parameter, and T5 is water tank temperature, and b is temperature difference correction factor.
According to one embodiment of present invention, the frequency of water outlet design temperature to frequency-changeable compressor of the described leaving water temperature according to described heat exchanger and described heat exchanger controls specifically to comprise: obtain the temperature difference between the leaving water temperature of described heat exchanger and water outlet design temperature; Obtain the interval at described temperature difference place, and obtain correction value according to the interval at described temperature difference place; The target frequency of described frequency-changeable compressor is generated according to the ongoing frequency of described frequency-changeable compressor and described correction value.
According to one embodiment of present invention, described control method also comprises: the target frequency of described frequency-changeable compressor and described unit can running frequency be compared by the unit in running frequency set; Obtaining the unit the most close with described target frequency can running frequency, and using described unit can running frequency as described target frequency.
According to one embodiment of present invention, described described unit can running frequency to be comprised as described target frequency particularly: obtain unit operation minimum frequency and unit operation peak frequency under described water tank temperature; Described unit running frequency and described group can be run minimum frequency and described unit operation peak frequency; If described unit can running frequency between described unit operation minimum frequency and described unit operation peak frequency, then using described unit can running frequency as described target frequency.
According to one embodiment of present invention, described control method also comprises: if described unit running frequency can be greater than unit operation peak frequency, then using described unit operation peak frequency as described target frequency; If described unit running frequency can be less than unit operation minimum frequency, then using described unit operation minimum frequency as described target frequency.
To achieve these goals, the frequency control system of the electric frequency conversion heat pump hot water machine compressor of second aspect present invention embodiment, comprising: frequency-changeable compressor; The heat exchanger be connected with described frequency-changeable compressor; Be arranged on the first temperature sensor of the delivery port of described heat exchanger, for detecting the leaving water temperature of described heat exchanger; The water tank be connected with described heat exchanger; Be arranged on the second temperature sensor in described water tank, for detecting the water tank temperature of described water tank; Controller, for obtaining the leaving water temperature of described heat exchanger from described first temperature sensor, and from described second temperature sensor, obtain the leaving water temperature of described water tank, then generate the water outlet design temperature of described heat exchanger according to described water tank temperature, and control according to the leaving water temperature of described heat exchanger and the frequency of water outlet design temperature to frequency-changeable compressor.
According to the frequency control system of the frequency conversion heat pump hot water machine compressor of the embodiment of the present invention, controller obtains the leaving water temperature of heat exchanger from the first temperature sensor, and from the second temperature sensor, obtain the water tank temperature of water tank, then the water outlet design temperature of heat exchanger is generated according to water tank temperature, and control according to the leaving water temperature of heat exchanger and the frequency of water outlet design temperature to frequency-changeable compressor, this embodiment proposes a kind of mode controlled by the frequency of leaving water temperature to frequency-changeable compressor of heat exchanger, effectively can reduce the running frequency of compressor, promote unit operational energy efficiency, in guarantee effluent temperature constancy situation, ensure the reliability of compressor.
Wherein, in one embodiment of the invention, described controller generates described water outlet design temperature by following formula, T1S=a1*a2*a3*T5+b, wherein, T1S is water outlet design temperature, a1 is water-water heat exchanger correction factor in water tank, and a2 is source pump capacity correction coefficient, and a3 is corrected parameter, T5 is water tank temperature, and b is temperature difference correction factor.
According to one embodiment of present invention, described controller, specifically for: obtain the temperature difference between the leaving water temperature of described heat exchanger and water outlet design temperature; Obtain the interval at described temperature difference place, and obtain correction value according to the interval at described temperature difference place; The target frequency of described frequency-changeable compressor is generated according to the ongoing frequency of described frequency-changeable compressor and described correction value.
According to one embodiment of present invention, described controller, also for: the target frequency of described frequency-changeable compressor and described unit can running frequency be compared by the unit in running frequency set; Obtaining the unit the most close with described target frequency can running frequency, and using described unit can running frequency as described target frequency.
According to one embodiment of present invention, described controller, also for: obtain unit operation minimum frequency and unit operation peak frequency under described water tank temperature; Described unit running frequency and described group can be run minimum frequency and described unit operation peak frequency; If described unit can running frequency between described unit operation minimum frequency and described unit operation peak frequency, then using described unit can running frequency as described target frequency.
According to one embodiment of present invention, described controller, also for: if described unit running frequency can be greater than unit operation peak frequency, then using described unit operation peak frequency as described target frequency; If described unit running frequency can be less than unit operation minimum frequency, then using described unit operation minimum frequency as described target frequency.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein,
Fig. 1 is the flow chart of the control method for frequency of frequency conversion heat pump hot water machine compressor according to an embodiment of the invention.
Fig. 2 is the structural representation of the frequency control system of frequency conversion heat pump hot water machine compressor according to an embodiment of the invention.
Fig. 3 is the principle exemplary plot of the frequency control system of frequency conversion heat pump hot water machine compressor according to an embodiment of the invention.
Reference numeral:
Frequency-changeable compressor 10, heat exchanger 20, first temperature sensor 30, water tank 40, second temperature sensor 50, controller 60, throttling part 70, water circulating pump 80, water tank inner water-water heat exchanger 90, water-refrigerant heat exchanger 21.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
Below with reference to the accompanying drawings control method for frequency and the system of the frequency conversion heat pump hot water machine compressor of the embodiment of the present invention are described.
Fig. 1 is the flow chart of the control method for frequency of frequency conversion heat pump hot water machine compressor according to an embodiment of the invention.
As shown in Figure 1, the control method for frequency of this frequency conversion heat pump hot water machine compressor can comprise:
S101, detects the leaving water temperature of heat exchanger and the water tank temperature of water tank.
Particularly, in the process of frequency conversion heat pump hot water machine work, the first temperature sensor being arranged on the delivery port of heat exchanger can detect the leaving water temperature of heat exchanger, and the second temperature sensor be arranged in water tank can detect the water tank temperature of water tank.
S102, generates the water outlet design temperature of heat exchanger according to water tank temperature.
After the water tank temperature obtaining water tank, generate the water design temperature T1S of heat exchanger by following formula,
T1S＝a1*a2*a3*T5+b
Wherein, a1 is water-water heat exchanger correction factor in water tank, and a2 is source pump capacity correction coefficient, and a3 is corrected parameter, and T5 is water tank temperature, and b is temperature difference correction factor.
It should be noted that, in above-mentioned water tank, water-water heat exchanger correction factor, source pump capacity correction coefficient, corrected parameter and temperature difference correction factor can set according to the service condition of reality, that is, under different service conditions, water-water heat exchanger correction factor in above-mentioned water tank, source pump capacity correction coefficient, corrected parameter may be different with the value of temperature difference correction factor.
S103, controls according to the leaving water temperature of heat exchanger and the frequency of water outlet design temperature to frequency-changeable compressor.
In one embodiment of the invention, after the water outlet design temperature generating heat exchanger according to water tank temperature, first can obtain the temperature difference between the leaving water temperature of heat exchanger and water outlet design temperature, then the interval at temperature difference place is obtained, and obtain correction value according to the interval at temperature difference place, and according to the ongoing frequency of frequency-changeable compressor and the target frequency of correction value generation frequency-changeable compressor.
Wherein, the corresponding relation of the frequency control system of compressor the storage temperature difference interval at place and the correction value of compressor frequency in advance, said temperature is poor refers to the result that leaving water temperature deducts water outlet design temperature and obtains.
Such as, the interval at temperature difference place of preserving in advance and the mapping table of correction value, as shown in table 1.
The interval at table 1 temperature difference place and the mapping table of correction value
| The interval of temperature difference (unit be DEG C) | Correction value (unit is Hz) |
| (2,3] | -8Hz |
| (1,2] | -4Hz |
| [-1,1] | 0Hz |
| (-1,-2] | 4Hz |
| (-2,-3] | 8Hz |
It should be noted that, table 1 is only be only a kind of example of corresponding relation between the interval at temperature difference place and correction value, illustrate only the interval at temperature difference place and a part of corresponding relation of correction value in table 1.
Such as, assuming that the corresponding relation of the correction value of temperature difference and compressor frequency is as shown in table 1, assuming that the water outlet design temperature calculating heat exchanger according to water tank temperature is 14 DEG C, the leaving water temperature that second temperature sensor obtains heat exchanger is 15.6 DEG C, the ongoing frequency of frequency-changeable compressor is 18Hz, the temperature gap that can be calculated leaving water temperature and water outlet design temperature by calculating is 1.6 DEG C, 1 can obtain this temperature difference by tabling look-up and be positioned at (1, 2] between, correction value corresponding to this temperature difference is-4Hz, the result obtained after the ongoing frequency of frequency-changeable compressor is added correction value is the target frequency of frequency-changeable compressor, the i.e. target frequency 12Hz of frequency-changeable compressor.
In addition, in this embodiment, after according to the ongoing frequency of frequency-changeable compressor and the target frequency of correction value generation frequency-changeable compressor, can also adjust further by the target frequency of running frequency to frequency-changeable compressor according to unit.
Particularly, the target frequency of frequency-changeable compressor and unit can running frequency can be compared by the unit in running frequency set, then obtaining the unit the most close with target frequency can running frequency.
Under usual different water tank temperature, the scope of unit operation frequency is different, obtain the unit the most close with target frequency can after running frequency, first can obtain unit operation peak frequency and minimum frequency under current water tank temperature, and this unit can running frequency and unit operation peak frequency and unit operation peak frequency be compared, if this unit can running frequency between unit operation minimum frequency and unit operation peak frequency, then using unit can running frequency as target frequency; If this unit running frequency can be greater than unit operation peak frequency, then using unit operation peak frequency as target frequency; If unit running frequency can be less than unit operation minimum frequency, then using unit operation minimum frequency as target frequency.
Such as, assuming that the target frequency Fs calculating frequency-changeable compressor according to leaving water temperature and water outlet design temperature is 15Hz, the frequency that unit can run comprises four kinds of frequencies, unit can running frequency F1 be 10Hz, unit can running frequency F2 be 14Hz, unit can running frequency F3 be 18Hz, and unit can running frequency F4 be 22Hz.If unit operation peak frequency F under current water tank temperature
maxfor 17Hz, unit operation minimum frequency F under current water tank temperature
minfor 11Hz, after the target frequency Fs obtaining frequency-changeable compressor, compared by the frequency can run with unit, can find out, can running frequency be that unit can running frequency F2 with the immediate unit of target frequency Fs of frequency-changeable compressor, because 14Hz is between 11Hz and 17Hz, therefore, can using unit can running frequency F2 as the target frequency of frequency-changeable compressor, frequency-changeable compressor runs with the frequency of 14Hz.
In summary it can be seen, by the frequency adopting the leaving water temperature of heat exchanger to control frequency-changeable compressor, the running frequency of compressor can be effectively reduced, promote unit operational energy efficiency, limit the low-limit frequency of unit operation when water temperature is higher, ensure the reliability of compressor.
According to the control method for frequency of the frequency conversion heat pump hot water machine compressor of the embodiment of the present invention, first the leaving water temperature of heat exchanger and the water tank temperature of water tank is detected, then the water outlet design temperature of heat exchanger is generated according to water tank temperature, and control according to the leaving water temperature of heat exchanger and the frequency of water outlet design temperature to frequency-changeable compressor, this embodiment proposes a kind of mode controlled by the frequency of leaving water temperature to compressor of heat exchanger, effectively can reduce the running frequency of frequency-changeable compressor, promote unit operational energy efficiency, in guarantee effluent temperature constancy situation, ensure the reliability of compressor.
In order to realize above-described embodiment, the invention allows for the Expenditure Levels evaluating system of magnesium rod in a kind of electric heater.
Fig. 2 is the structural representation of the frequency control system of frequency conversion heat pump hot water machine compressor according to an embodiment of the invention.
As shown in Figure 2, the frequency control system of this frequency conversion heat pump hot water machine compressor comprises frequency-changeable compressor 10, the heat exchanger 20 be connected with frequency-changeable compressor 10, the first temperature sensor 30 of delivery port being arranged on heat exchanger 20, the water tank 40 be connected with heat exchanger 20, is arranged on the second temperature sensor 50 in water tank 40 and controller 60.Wherein:
First temperature sensor 30 is for detecting the leaving water temperature of heat exchanger 20; Second temperature sensor 50 is for detecting the water tank temperature of water tank 40; Controller 60 for obtaining the leaving water temperature of heat exchanger 20 from the first temperature sensor 30, and from the second temperature sensor 50, obtain the leaving water temperature of water tank 40, then generate the water outlet design temperature of heat exchanger 20 according to water tank temperature, and control according to the leaving water temperature of heat exchanger 20 and the frequency of water outlet design temperature to frequency-changeable compressor 10.
Wherein, controller 60 generates water outlet design temperature T1S by following formula,
T1S＝a1*a2*a3*T5+b
Wherein, the a1 in this formula is water-water heat exchanger correction factor in water tank, and a2 is source pump capacity correction coefficient, and a3 is corrected parameter, and T5 is water tank temperature, and b is temperature difference correction factor.
It should be noted that, in above-mentioned water tank, water-water heat exchanger correction factor, source pump capacity correction coefficient, corrected parameter and temperature difference correction factor can set according to the service condition of reality, that is, under different service conditions, water-water heat exchanger correction factor in above-mentioned water tank, source pump capacity correction coefficient, corrected parameter may be different with the value of temperature difference correction factor.
Controller 60 is after the water outlet design temperature generating heat exchanger 20 according to water tank temperature, controller 60 first can obtain the temperature difference between the leaving water temperature of heat exchanger 20 and water outlet design temperature, then the interval at temperature difference place is obtained, and obtain correction value according to the interval at temperature difference place, and according to the ongoing frequency of frequency-changeable compressor 10 and the target frequency of correction value generation frequency-changeable compressor 10.
Wherein, the corresponding relation of the control system storage temperature difference interval at place and the correction value of compressor frequency in advance, said temperature is poor refers to the result that leaving water temperature deducts water outlet design temperature and obtains.
Such as, the interval at temperature difference place of preserving in advance and the mapping table of correction value, as shown in table 1.
The interval at table 1 temperature difference place and the mapping table of correction value
| The interval of temperature difference (unit be DEG C) | Correction value (unit is Hz) |
| (2,3] | -8Hz |
| (1,2] | -4Hz |
| [-1,1] | 0Hz |
| (-1,-2] | 4Hz |
| (-2,-3] | 8Hz |
It should be noted that, table 1 is only be only a kind of example of corresponding relation between the interval at temperature difference place and correction value, illustrate only the interval at temperature difference place and a part of corresponding relation of correction value in table 1.
Such as, assuming that the corresponding relation of the correction value of temperature difference and frequency-changeable compressor frequency is as shown in table 1, assuming that the water outlet design temperature calculating heat exchanger 20 according to water tank temperature is 14 DEG C, the leaving water temperature that second temperature sensor 50 obtains heat exchanger is 15.6 DEG C, the ongoing frequency of frequency-changeable compressor 10 is 18Hz, the temperature gap that can be calculated leaving water temperature and water outlet design temperature by calculating is 1.6 DEG C, 1 can obtain this temperature difference by tabling look-up and be positioned at (1, 2] between, correction value corresponding to this temperature difference is-4Hz, the result obtained after the ongoing frequency of frequency-changeable compressor is added correction value is the target frequency of frequency-changeable compressor, namely the target frequency of frequency-changeable compressor is 12Hz.
In addition, in this embodiment, controller 60 is after generating the target frequency of frequency-changeable compressor 10 according to the ongoing frequency of frequency-changeable compressor 10 and correction value, and controller 60 can also adjust by the target frequency of running frequency to frequency-changeable compressor 10 further according to unit.
Particularly, the target frequency of frequency-changeable compressor 10 and unit can can running frequency compare by the unit in running frequency set by controller 60, and then obtaining the unit the most close with target frequency can running frequency.
Under usual different water tank temperature, the scope of unit operation frequency is different, controller 60 obtain the unit the most close with target frequency can after running frequency, first can obtain unit operation peak frequency and minimum frequency under current water tank temperature, then this unit can running frequency and unit operation peak frequency and unit operation peak frequency be compared, if this unit can running frequency between unit operation minimum frequency and unit operation peak frequency, then using unit can running frequency as target frequency; If this unit running frequency can be greater than unit operation peak frequency, then using unit operation peak frequency as target frequency; If unit running frequency can be less than unit operation minimum frequency, then using unit operation minimum frequency as target frequency.
Such as, assuming that the target frequency Fs calculating frequency-changeable compressor 10 according to leaving water temperature and water outlet design temperature is 15Hz, the frequency that unit can run comprises four kinds of frequencies, unit can running frequency F1 be 10Hz, unit can running frequency F2 be 14Hz, unit can running frequency F3 be 18Hz, and unit can running frequency F4 be 22Hz.If unit operation peak frequency F under current water tank temperature
maxfor 17Hz, unit operation minimum frequency F under current water tank temperature
minfor 11Hz, after the target frequency Fs obtaining compressor, compared by the frequency can run with unit, can find out, can running frequency be that unit can running frequency F2 with the immediate unit of target frequency Fs of compressor, because 14Hz is between 11Hz and 17Hz, therefore, controller 60 can using unit can running frequency F2 as the target frequency of frequency-changeable compressor 10, frequency-changeable compressor 10 runs with the frequency of 14Hz.
Wherein, the principle exemplary plot of the frequency control system of this frequency conversion heat pump hot water machine compressor, as shown in Figure 3, heat exchanger 20 in Fig. 3 between frequency-changeable compressor 10 and throttling part 70 can water-refrigerant heat exchanger or air-refrigerant heat exchanger, water tank 40 comprises the second temperature sensor 50 and the inner water-water heat exchanger 90 of water tank, and the inner water-water heat exchanger 90 of water tank is connected with water-refrigerant heat exchanger 21 by water circulating pump 80.
According to the frequency control system of the frequency conversion heat pump hot water machine compressor of the embodiment of the present invention, controller obtains the leaving water temperature of heat exchanger from the first temperature sensor, and from the second temperature sensor, obtain the water tank temperature of water tank, then the water outlet design temperature of heat exchanger is generated according to water tank temperature, and control according to the leaving water temperature of heat exchanger and the frequency of water outlet design temperature to frequency-changeable compressor, this embodiment proposes a kind of mode controlled by the frequency of leaving water temperature to frequency-changeable compressor of heat exchanger, effectively can reduce the running frequency of compressor, promote unit operational energy efficiency, in guarantee effluent temperature constancy situation, ensure the reliability of compressor.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
Describe and can be understood in flow chart or in this any process otherwise described or method, represent and comprise one or more for realizing the module of the code of the executable instruction of the step of specific logical function or process, fragment or part, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can not according to order that is shown or that discuss, comprise according to involved function by the mode while of basic or by contrary order, carry out n-back test, this should understand by embodiments of the invention person of ordinary skill in the field.
In flow charts represent or in this logic otherwise described and/or step, such as, the sequencing list of the executable instruction for realizing logic function can be considered to, may be embodied in any computer-readable medium, for instruction execution system, device or equipment (as computer based system, comprise the system of processor or other can from instruction execution system, device or equipment instruction fetch and perform the system of instruction) use, or to use in conjunction with these instruction execution systems, device or equipment.With regard to this description, " computer-readable medium " can be anyly can to comprise, store, communicate, propagate or transmission procedure for instruction execution system, device or equipment or the device that uses in conjunction with these instruction execution systems, device or equipment.The example more specifically (non-exhaustive list) of computer-readable medium comprises following: the electrical connection section (electronic installation) with one or more wiring, portable computer diskette box (magnetic device), random access memory (RAM), read-only storage (ROM), erasablely edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk read-only storage (CDROM).In addition, computer-readable medium can be even paper or other suitable media that can print described program thereon, because can such as by carrying out optical scanner to paper or other media, then carry out editing, decipher or carry out process with other suitable methods if desired and electronically obtain described program, be then stored in computer storage.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logic function to data-signal, there is the special IC of suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium mentioned can be read-only storage, disk or CD etc.Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (12)
1. a control method for frequency for frequency conversion heat pump hot water machine compressor, is characterized in that, comprises the following steps:
Detect the leaving water temperature of heat exchanger and the water tank temperature of water tank;
The water outlet design temperature of described heat exchanger is generated according to described water tank temperature; And
Control according to the leaving water temperature of described heat exchanger and the frequency of water outlet design temperature to frequency-changeable compressor.
2. the control method for frequency of frequency conversion heat pump hot water machine compressor as claimed in claim 1, is characterized in that, generate described water outlet design temperature by following formula,
T1S=a1*a2*a3*T5+b, wherein, T1S is water outlet design temperature, and a1 is water-water heat exchanger correction factor in water tank, and a2 is source pump capacity correction coefficient, and a3 is corrected parameter, and T5 is water tank temperature, and b is temperature difference correction factor.
3. the control method for frequency of frequency conversion heat pump hot water machine compressor as claimed in claim 1, it is characterized in that, the frequency of water outlet design temperature to frequency-changeable compressor of the described leaving water temperature according to described heat exchanger and described heat exchanger controls specifically to comprise:
Obtain the temperature difference between the leaving water temperature of described heat exchanger and water outlet design temperature;
Obtain the interval at described temperature difference place, and obtain correction value according to the interval at described temperature difference place;
The target frequency of described frequency-changeable compressor is generated according to the ongoing frequency of described frequency-changeable compressor and described correction value.
4. the control method for frequency of frequency conversion heat pump hot water machine compressor as claimed in claim 3, is characterized in that, also comprise:
The target frequency of described frequency-changeable compressor and described unit can running frequency be compared by the unit in running frequency set;
Obtaining the unit the most close with described target frequency can running frequency, and using described unit can running frequency as described target frequency.
5. the control method for frequency of frequency conversion heat pump hot water machine compressor as claimed in claim 4, is characterized in that, describedly can running frequency be comprised particularly as described target frequency by described unit:
Obtain unit operation minimum frequency and unit operation peak frequency under described water tank temperature;
Described unit running frequency and described group can be run minimum frequency and described unit operation peak frequency compares;
If described unit can running frequency between described unit operation minimum frequency and described unit operation peak frequency, then using described unit can running frequency as described target frequency.
6. the control method for frequency of frequency conversion heat pump hot water machine compressor as claimed in claim 5, is characterized in that, also comprise:
If described unit running frequency can be greater than described unit operation peak frequency, then using described unit operation peak frequency as described target frequency;
If described unit running frequency can be less than described unit operation minimum frequency, then using described unit operation minimum frequency as described target frequency.
7. a frequency control system for frequency conversion heat pump hot water machine compressor, is characterized in that, comprising:
Frequency-changeable compressor;
The heat exchanger be connected with described frequency-changeable compressor;
Be arranged on the first temperature sensor of the delivery port of described heat exchanger, for detecting the leaving water temperature of described heat exchanger;
The water tank be connected with described heat exchanger;
Be arranged on the second temperature sensor in described water tank, for detecting the water tank temperature of described water tank;
Controller, for obtaining the leaving water temperature of described heat exchanger from described first temperature sensor, and from described second temperature sensor, obtain the leaving water temperature of described water tank, then generate the water outlet design temperature of described heat exchanger according to described water tank temperature, and control according to the leaving water temperature of described heat exchanger and the frequency of water outlet design temperature to frequency-changeable compressor.
8. the frequency control system of frequency conversion heat pump hot water machine compressor as claimed in claim 7, it is characterized in that, described controller generates described water outlet design temperature by following formula,
T1S=a1*a2*a3*T5+b, wherein, T1S is water outlet design temperature, and a1 is water-water heat exchanger correction factor in water tank, and a2 is source pump capacity correction coefficient, and a3 is corrected parameter, and T5 is water tank temperature, and b is temperature difference correction factor.
9. the frequency control system of frequency conversion heat pump hot water machine compressor as claimed in claim 7, is characterized in that, described controller, specifically for:
Obtain the temperature difference between the leaving water temperature of described heat exchanger and water outlet design temperature;
Obtain the interval at described temperature difference place, and obtain correction value according to the interval at described temperature difference place;
The target frequency of described frequency-changeable compressor is generated according to the ongoing frequency of described frequency-changeable compressor and described correction value.
10. the frequency control system of frequency conversion heat pump hot water machine compressor as claimed in claim 9, is characterized in that, described controller, also for:
The target frequency of described frequency-changeable compressor and described unit can running frequency be compared by the unit in running frequency set;
Obtaining the unit the most close with described target frequency can running frequency, and using described unit can running frequency as described target frequency.
The frequency control system of 11. frequency conversion heat pump hot water machine compressors as claimed in claim 9, is characterized in that, described controller, also for:
Obtain unit operation minimum frequency and unit operation peak frequency under described water tank temperature;
Described unit running frequency and described group can be run minimum frequency and described unit operation peak frequency compares;
If described unit can running frequency between described unit operation minimum frequency and described unit operation peak frequency, then using described unit can running frequency as described target frequency.
The frequency control system of 12. frequency conversion heat pump hot water machine compressors as claimed in claim 11, is characterized in that, described controller, also for:
If described unit running frequency can be greater than described unit operation peak frequency, then using described unit operation peak frequency as described target frequency;
If described unit running frequency can be less than described unit operation minimum frequency, then using described unit operation minimum frequency as described target frequency.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510268372.7A CN104833102A (en) | 2015-05-22 | 2015-05-22 | Frequency control method and system for electric frequency conversion heat pump hot water machine compressor |
| EP15893020.6A EP3299744A4 (en) | 2015-05-22 | 2015-07-16 | Frequency control method and system for variable frequency compressor of heat pump hot water machine |
| US15/501,122 US20180106483A1 (en) | 2015-05-22 | 2015-07-16 | Method and system for controlling frequency of variable-frequency compressor in heat pump water heater |
| PCT/CN2015/084252 WO2016187939A1 (en) | 2015-05-22 | 2015-07-16 | Frequency control method and system for variable frequency compressor of heat pump hot water machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510268372.7A CN104833102A (en) | 2015-05-22 | 2015-05-22 | Frequency control method and system for electric frequency conversion heat pump hot water machine compressor |
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| Publication Number | Publication Date |
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| CN104833102A true CN104833102A (en) | 2015-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510268372.7A Pending CN104833102A (en) | 2015-05-22 | 2015-05-22 | Frequency control method and system for electric frequency conversion heat pump hot water machine compressor |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20180106483A1 (en) |
| EP (1) | EP3299744A4 (en) |
| CN (1) | CN104833102A (en) |
| WO (1) | WO2016187939A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3299744A4 (en) | 2019-01-02 |
| US20180106483A1 (en) | 2018-04-19 |
| WO2016187939A1 (en) | 2016-12-01 |
| EP3299744A1 (en) | 2018-03-28 |
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Application publication date: 20150812 |