CN105444419A - Method and device for controlling compressor frequency of air-energy water heater - Google Patents
Method and device for controlling compressor frequency of air-energy water heater Download PDFInfo
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- CN105444419A CN105444419A CN201410406117.XA CN201410406117A CN105444419A CN 105444419 A CN105444419 A CN 105444419A CN 201410406117 A CN201410406117 A CN 201410406117A CN 105444419 A CN105444419 A CN 105444419A
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Abstract
The invention discloses a method and device for controlling the compressor frequency of an air-energy water heater. The method comprises the following steps that the upper limiting frequency and lower limiting frequency of a compressor during operating are confirmed according to the environment temperature, and intermediate frequency is calculated; the first difference value of the upper portion water temperature and the lower portion water temperature of a water tank, the first preset temperature difference and the second preset temperature difference are judged, and the second difference value of the preset temperature and the upper portion water temperature and the third preset temperature difference are judged; when the first difference value is greater than or equal to the first preset temperature difference or the second difference value is greater than or equal to the third preset temperature difference, the compressor is operated in the upper limiting frequency, and operating frequency is adjusted continuously according to the change of the water temperature; when the first difference value is greater than the second preset temperature difference and less than the first preset temperature difference, the second difference value is less than the third preset temperature difference, the compressor is operated in the intermediate frequency, and the operating frequency is adjusted continuously according to the change of the water temperature; when the first difference value is less than the second preset temperature difference, the second difference value is less than the third preset temperature difference, the compressor is operated in the lower limiting frequency. According to the method and device for controlling the compressor frequency of the air-energy water heater, the frequency control is more reasonable.
Description
Technical field
The present invention relates to household appliance technical field, the method that the compressor frequency particularly relating to a kind of air-source water heater controls and device.
Background technology
The systems that family expenses directly-heated type air source water heater generally adopts " great heating capacity off-premises station+low capacity water tank ", according to the method for operation, outer machine start is water tank additional heat while with hot water, the hot water that low capacity water tank stores mainly provides hot water in the off-premises station initial start unstable stage, play cushioning effect, the main source of hot water still runs by off-premises station and heats.
Owing to providing hot water with needing unit starting to run in hot water process, therefore, the frequency of compressor needs according to by hot water situation and water tank water temperature flexible modulation.The frequency of compressor adjusts irrational words, and when hot water amount can be caused to increase suddenly, the too small hot water that causes of unit capacity supplements deficiency, or needs again to reopen after arriving temperature spot shutdown too early.
Summary of the invention
Based on this, be necessary in conventional art, the problem that compressor frequency adjustment is dumb easily to be caused hot water to supplement deficiency or high frequent to restart, a kind of method providing compressor frequency adjusting the air-source water heater of compressor operating frequency according to water tank water temperature in time to control and device.
For the method that the compressor frequency realizing a kind of air-source water heater that the object of the invention provides controls, comprise the following steps:
The environmentally upper limiting frequency of temperature determination compressor operating and lower frequency limit, and the mean value calculating described upper limiting frequency and described lower frequency limit is as intermediate frequency;
Judge that the top water temperature of water tank and the first difference of bottom water temperature and first preset the magnitude relationship that the temperature difference and second presets the temperature difference, and the second difference of design temperature and described top water temperature and the 3rd presets the magnitude relationship of the temperature difference;
When described first difference is more than or equal to the described first default temperature difference or described second difference is more than or equal to the described 3rd default temperature difference, control compressor to run with described upper limiting frequency, and continue the running frequency adjusting compressor according to the change of described top water temperature and described bottom water temperature between described intermediate frequency and described upper limiting frequency;
Preset the temperature difference when described first difference is greater than second and is less than the first default temperature difference, and described second difference be less than the described 3rd preset the temperature difference time, control compressor to run with described intermediate frequency, and continue the running frequency adjusting compressor according to the change of described upper water gentle described bottom water temperature between described lower frequency limit and described intermediate frequency;
Preset the temperature difference when described first difference is less than or equal to described second, and when described second difference is less than the described 3rd default temperature difference, controls compressor and run with described lower frequency limit;
Wherein, the described first default temperature difference is greater than the described second default temperature difference.
As the embodiment of a kind of method that compressor frequency of air-source water heater controls, the upper limiting frequency of described environmentally temperature determination compressor operating and lower frequency limit, and the mean value calculating described upper limiting frequency and described lower frequency limit is as intermediate frequency, comprises the following steps:
Judge whether environment temperature is more than or equal to the first preset temperature;
If so, then setting described upper limiting frequency is the first maximum, and setting described lower frequency limit is the first minimum of a value;
If not, then continue to judge whether environment temperature is greater than the second preset temperature;
If so, then according to formula: upper limiting frequency=the first maximum+(environment temperature-the second preset temperature) * (the second maximum-the first maximum)/(the first preset temperature-the second preset temperature), sets described upper limiting frequency; According to formula: lower frequency limit=the first minimum of a value+(environment temperature-the second preset temperature) * (the second minimum of a value-the first minimum of a value)/(the first preset temperature-the second preset temperature), sets described lower limit temperature;
If not, then setting described upper limiting frequency is the second maximum, and setting described lower frequency limit is the second minimum of a value;
Wherein, described first maximum is less than or equal to described second maximum, and described first minimum of a value is less than or equal to described second minimum of a value.
As the embodiment of a kind of method that compressor frequency of air-source water heater controls, the span of described first preset temperature is: [30 DEG C, 35 DEG C]; The span of described second preset temperature is: [0 DEG C, 7 DEG C]; The span of described first maximum is: [45Hz, 55Hz]; The span of described second maximum is [80Hz, 90Hz]; The span of described first minimum of a value is: [10Hz, 20Hz]; The span of described second minimum of a value is: [50Hz, 60Hz].
As the embodiment of a kind of method that compressor frequency of air-source water heater controls, the described change according to described top water temperature and described bottom water temperature adjusts the running frequency of compressor between described intermediate frequency and described upper limiting frequency, comprises the following steps:
When detecting that described top water temperature or described bottom water temperature rise or decline, then corresponding for the current operation frequency of compressor is turned down or tune up;
Judge that the running frequency of the compressor after turning down or tuning up is whether in [intermediate frequency, upper limiting frequency] scope;
If so, then control compressor to run according to the running frequency after turning down or tuning up;
If not, then control compressor to run according to described intermediate frequency or described upper limiting frequency.
As the embodiment of a kind of method that compressor frequency of air-source water heater controls, the described change according to described upper water gentle described bottom water temperature adjusts the running frequency of compressor between described lower frequency limit and described intermediate frequency, comprises the following steps:
When detecting that described top water temperature or described bottom water temperature rise or decline, then corresponding for the current operation frequency of compressor is turned down or tune up;
Judge that the running frequency of the compressor after turning down or tuning up is whether in [lower frequency limit, intermediate frequency] scope;
If so, then control compressor to run according to the running frequency after turning down or tuning up;
If not, then control compressor to run according to described lower frequency limit or described intermediate frequency.
As the embodiment of a kind of method that compressor frequency of air-source water heater controls, preset the temperature difference or described second difference and be more than or equal to the described 3rd when described first difference is more than or equal to described first and preset the temperature difference, or preset the temperature difference when described first difference is less than or equal to described second, and described second difference is less than the described 3rd when presetting the temperature difference, the step of the running frequency of the change adjustment compressor of the middle part water temperature between also comprising according to described upper water gentle described bottom water temperature;
When detecting that described middle part water temperature rises or declines, then corresponding for the current operation frequency of compressor is turned down or tune up.
Based on the device that the compressor frequency of a kind of air-source water heater of same inventive concept controls, comprise compressor frequency determination module, the first judge module, the first Executive Module, the second Executive Module and the 3rd Executive Module, wherein:
Described compressor frequency determination module, for upper limiting frequency and the lower frequency limit of environmentally temperature determination compressor operating, and the mean value calculating described upper limiting frequency and described lower frequency limit is as intermediate frequency;
Described first judge module, the first difference and first for the top water temperature and bottom water temperature that judge water tank presets the magnitude relationship that the temperature difference and second presets the temperature difference, and the second difference of design temperature and described top water temperature and the 3rd presets the magnitude relationship of the temperature difference;
Described first Executive Module, for be more than or equal to when described first difference described first preset the temperature difference or described second difference be more than or equal to the described 3rd preset the temperature difference time, control compressor to run with described upper limiting frequency, and continue the running frequency adjusting compressor according to the change of described top water temperature and described bottom water temperature between described intermediate frequency and described upper limiting frequency;
Described second Executive Module, preset the temperature difference for being greater than second when described first difference and being less than the first default temperature difference, and described second difference be less than the described 3rd preset the temperature difference time, control compressor to run with described intermediate frequency, and continue the running frequency adjusting compressor according to the change of described upper water gentle described bottom water temperature between described lower frequency limit and described intermediate frequency;
Described 3rd Executive Module, presets the temperature difference for being less than or equal to described second when described first difference, and when described second difference is less than the described 3rd default temperature difference, controls compressor and run with described lower frequency limit;
Wherein, the described first default temperature difference is greater than the described second default temperature difference.
As the embodiment of the device that a kind of compressor frequency of air-source water heater controls, described compressor frequency determination module comprises the first judgement submodule, the first implementation sub-module, second judges submodule, the second implementation sub-module and the 3rd implementation sub-module, wherein:
Described first judges submodule, for judging whether environment temperature is more than or equal to the first preset temperature;
Described first implementation sub-module, for judging the judged result of submodule according to described first, when environment temperature is more than or equal to described first preset temperature, setting described upper limiting frequency is the first maximum, and setting described lower frequency limit is the first minimum of a value;
Described second judges submodule, for judging the judged result of submodule according to described first, when environment temperature is less than described first preset temperature, continues to judge whether environment temperature is greater than the second preset temperature;
Described second implementation sub-module, for judging the judged result of submodule according to described second, when environment temperature is greater than described second preset temperature, according to formula: upper limiting frequency=the first maximum+(environment temperature-the second preset temperature) * (the second maximum-the first maximum)/(the first preset temperature-the second preset temperature), sets described upper limiting frequency; According to formula: lower frequency limit=the first minimum of a value+(environment temperature-the second preset temperature) * (the second minimum of a value-the first minimum of a value)/(the first preset temperature-the second preset temperature), sets described lower limit temperature;
Described 3rd implementation sub-module, for judging the judged result of submodule according to described second, when environment temperature is less than or equal to described second preset temperature, setting described upper limiting frequency is the second maximum, and setting described lower frequency limit is the second minimum of a value;
Wherein, described first maximum is less than or equal to described second maximum, and described first minimum of a value is less than or equal to described second minimum of a value.
As the embodiment of the device that a kind of compressor frequency of air-source water heater controls, the span of described first preset temperature is: [30 DEG C, 35 DEG C]; The span of described second preset temperature is: [0 DEG C, 7 DEG C]; The span of described first maximum is: [45Hz, 55Hz]; The span of described second maximum is [80Hz, 90Hz]; The span of described first minimum of a value is: [10Hz, 20Hz]; The span of described second minimum of a value is: [50Hz, 60Hz].
As the embodiment of the device that a kind of compressor frequency of air-source water heater controls, described first Executive Module comprises first frequency adjustment submodule, the first scope judges submodule, the 4th implementation sub-module and the 5th implementation sub-module, wherein:
Described first frequency adjustment submodule, for when detecting that described top water temperature or described bottom water temperature rise or decline, then turning down corresponding for the current operation frequency of compressor or tune up;
Described first scope judges submodule, for judging that the running frequency of the compressor after turning down or tuning up is whether in [intermediate frequency, upper limiting frequency] scope;
Described 4th implementation sub-module, for judging the judgement of submodule according to described first scope, when running frequency is in scope, controls compressor and runs according to the running frequency after turning down or tuning up;
Described 5th implementation sub-module, for judging the judgement of submodule according to described first scope, when running frequency is not in scope, controls compressor and runs according to described intermediate frequency or described upper limiting frequency;
Described second Executive Module comprises second frequency adjustment submodule, the second scope judges submodule, the 6th implementation sub-module and the 7th implementation sub-module, wherein:
Described second frequency adjustment submodule, for when detecting that described top water temperature or described bottom water temperature rise or decline, then turning down corresponding for the current operation frequency of compressor or tune up;
Described second scope judges submodule, for judging that the running frequency of the compressor after turning down or tuning up is whether in [lower frequency limit, intermediate frequency] scope;
Described 6th implementation sub-module, for judging the judged result of submodule according to described second scope, when running frequency is in scope, controls compressor and runs according to the running frequency after turning down or tuning up;
Described 7th implementation sub-module, for judging the judged result of submodule according to described second scope, when running frequency is not in scope, controls compressor and runs according to described lower frequency limit or described intermediate frequency.
Beneficial effect of the present invention comprises: the method for the compressor frequency control of a kind of air-source water heater provided by the invention and device, first according to external environment, the i.e. temperature of air-source water heater place environment, the running frequency scope of setting compressor, by running frequency segmentation, compressor is controlled for different water tank temperatures regulate under different frequency ranges, and the running frequency that under arranging different frequency range, compressor is initial.Thus according to the running frequency of the water tank temperature of air-source water heater and ambient temperature adjustment compressor, making compressor when ensureing to meet hot water demand, unlikely ability is excessive to be caused and too fastly reaches default water temperature and restart when there being demand after shutting down.The FREQUENCY CONTROL of compressor is more reasonable, and extends the service life of air-source water heater compressor, reduces high frequent and restarts the loss caused.
Accompanying drawing explanation
Fig. 1 is the flow chart of a specific embodiment of the method that the compressor frequency of a kind of air-source water heater of the present invention controls;
Fig. 2 is the flow chart of another specific embodiment of the method that the compressor frequency of a kind of air-source water heater of the present invention controls;
Fig. 3 is the structural representation of a specific embodiment of the device that the compressor frequency of a kind of air-source water heater of the present invention controls;
Fig. 4 is the formation schematic diagram of the compressor frequency determination module of a specific embodiment of the device that the compressor frequency of a kind of air-source water heater of the present invention controls;
Fig. 5 is the formation schematic diagram of the first Executive Module of a specific embodiment of the device that the compressor frequency of a kind of air-source water heater of the present invention controls;
Fig. 6 is the formation schematic diagram of the second Executive Module of a specific embodiment of the device that the compressor frequency of a kind of air-source water heater of the present invention controls.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, the method controlled the compressor frequency of air-source water heater of the present invention below in conjunction with accompanying drawing and the detailed description of the invention of device are described.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The method of the compressor frequency control of the air-source water heater of one embodiment of the invention, as shown in Figure 1, comprises the following steps:
S100, environmentally the upper limiting frequency Fu of temperature determination compressor operating and lower frequency limit Fd, and the mean value calculating described upper limiting frequency and described lower frequency limit is as intermediate frequency Fm, Fm=(Fu+Fd)/2.So, the running frequency of the compressor of air-source water heater is divided into two sections, comprises three end points, thus compressor can be controlled in the adjustment of different frequency section according to the temperature of water tank, the frequency of compressor is adjusted more reasonable.
Certainly, also the running frequency of compressor can be divided into multistage in other embodiments, and in multiple segmentation, regulate the carrying out practically frequency of compressor accordingly.
S200, judge that the top water temperature Tw3 of water tank and first difference of bottom water temperature T w1 and first preset the magnitude relationship that the temperature difference and second presets the temperature difference, and second difference of design temperature Ts and described top water temperature Tw3 and the 3rd presets the magnitude relationship of the temperature difference.Described first presets the temperature difference is greater than the described second default temperature difference, and as a kind of embodiment, can arrange the first default temperature difference is 20 DEG C, and arranging the second default temperature difference is 5 DEG C, and the 3rd presets the temperature difference is also 5 DEG C.
S300, when described first difference is more than or equal to the described first default temperature difference or described second difference is more than or equal to the described 3rd default temperature difference, control compressor to run with described upper limiting frequency, and continue the running frequency adjusting compressor according to the change of described top water temperature and described bottom water temperature between described intermediate frequency and described upper limiting frequency.
Presetting the temperature difference with first is 20 DEG C, the second default temperature difference is 5 DEG C is example, namely, Tw3-Tw1 >=20 DEG C, or during Ts-Tw3 >=5 DEG C, now water tank temperature and design temperature difference are comparatively large, or the water temperature of water tank is not very stable, now need to make compressor in high-power lower operation, to make the water temperature of water tank reach the requirement of setting fast.Therefore, the now target frequency of compressor first capping frequency Fu, detects the water temperature change of water tank afterwards in real time, comprises the upper water gentle bottom water temperature of water tank, and adjusts the running frequency of compressor according to the change of temperature.That is, when detecting that words that the water temperature of water tank is improved can reduce the running frequency of compressor between [Fm, Fu] below.
S400, preset the temperature difference when described first difference is greater than second and is less than the first default temperature difference, and described second difference be less than the described 3rd preset the temperature difference time, control compressor to run with described intermediate frequency, and continue the running frequency adjusting compressor according to the change of described upper water gentle described bottom water temperature between described lower frequency limit and described intermediate frequency.
As 5 DEG C of < Tw3-Tw1 < 20 DEG C and Ts-Tw3 < 5 DEG C time, now, the water temperature of water tank and the difference of user's design temperature less, therefore, now first the target frequency of compressor gets intermediate frequency Fm, detect the water temperature change of water tank afterwards in real time, comprise the upper water gentle bottom water temperature of water tank, and adjust the running frequency of compressor according to the change of temperature.That is, when detecting that the water temperature of water tank is improved or the words that reduce can reduce or improve the running frequency of compressor accordingly between [Fd, Fm] below.
Now adopt lower compressor operating frequency, while guarantee provides energy hot-water supply to export for water tank, the running frequency avoiding compressor excessive causes compressor shutdown after the short time, and need again start when needing after a while.Reduce the loss of compressor, increase the service life.
S500, presets the temperature difference when described first difference is less than or equal to described second, and when described second difference is less than the described 3rd default temperature difference, controls compressor and run with described lower frequency limit.
Tw3-Tw1≤5 DEG C and Ts-Tw3 < 5 DEG C time; now the temperature of water tank is very close with design temperature; control compressor run at low frequencies, avoid compressor frequency too high make the heating capacity of air-source water heater excessive cause water heater shut down start shooting again.
The method of the compressor frequency control of the air-source water heater of the embodiment of the present invention, first according to external environment, the i.e. temperature of air-source water heater place environment, the running frequency scope of setting compressor, by running frequency segmentation, compressor is controlled for different water tank temperatures regulate under different frequency ranges, and the running frequency that under arranging different frequency range, compressor is initial.Thus according to the running frequency of the water tank temperature of air-source water heater and ambient temperature adjustment compressor, making compressor when ensureing to meet hot water demand, unlikely ability is excessive to be caused and too fastly reaches default water temperature and restart when there being demand after shutting down.The FREQUENCY CONTROL of compressor is more reasonable, and extends the service life of air-source water heater compressor, reduces high frequent and restarts the loss caused.
Wherein in an embodiment, step S100, environmentally the upper limiting frequency Fu of temperature determination compressor operating and lower frequency limit Fd, and the mean value calculating described upper limiting frequency and described lower frequency limit is as intermediate frequency Fm, comprises the following steps:
S110, judges whether environment temperature Te is more than or equal to the first preset temperature T1.
S120, if so, then setting described upper limiting frequency Fu is the first maximum Fmax1, and setting described lower frequency limit Fd is the first minimum of a value Fmin1.
S130, if not, then continues to judge whether environment temperature Te is greater than the second preset temperature T2.
S140, if, then according to formula: upper limiting frequency=the first maximum+(environment temperature-the second preset temperature) * (the second maximum-the first maximum)/(the first preset temperature-the second preset temperature), sets described upper limiting frequency; According to formula: lower frequency limit=the first minimum of a value+(environment temperature-the second preset temperature) * (the second minimum of a value-the first minimum of a value)/(the first preset temperature-the second preset temperature), sets described lower limit temperature;
S150, if not, then setting described upper limiting frequency is the second maximum, and setting described lower frequency limit is the second minimum of a value.Wherein, described first maximum Fmax1 is less than or equal to described second maximum Fmax2, and described first minimum of a value Fmin1 is less than or equal to described second minimum of a value Fmin2.
Concrete implementation is as follows:
1. environmentally temperature Te determines upper limiting frequency Fu:
A) as Te >=T1, Fu=Fmax1;
B) as T2 < Te < T1, Fu=Fmax1+ (Te-T2) * (Fmax2-Fmax1)/(T1-T2);
C) as Te≤T2, Fu=Fmax2.
2. environmentally temperature Te determines lower frequency limit Fd:
A) as Te >=T1, Fd=Fmin1;
B) as T2 < Te < T1, Fd=Fmin1+ (Te-T2) * (Fmin2-Fmin1)/(T1-T2);
C) as Te≤T2, Fd=Fmin2.
The wherein preferred 45Hz-55Hz of the first preset temperature T1 preferably 30 DEG C-35 DEG C, the second preset temperature T2 preferably 0 DEG C-7 DEG C, the first maximum Fmax1, the preferred 80Hz-90Hz of second maximum Fmax2, the preferred 10Hz-20Hz of first minimum of a value Fmin1, the preferred 50Hz-60Hz of the second minimum of a value Fmin2.
It is according to the running frequency of the ambient temperature determination compressor of air-source water heater place environment.When ambient temperature is higher, air-source water heater can obtain higher energy from air, now arranges lower compressor operating frequency, when ambient temperature is lower, then arranges higher compressor operating frequency, to meet hot water supply requirement.
As a kind of embodiment, in step S300, between described intermediate frequency and described upper limiting frequency, adjust the running frequency of compressor according to the change of described top water temperature and described bottom water temperature, comprise the following steps:
S310, when detecting that described top water temperature Tw3 or described bottom water temperature T w1 rises or declines, then turning down corresponding for the current operation frequency of compressor or tune up.Concrete, Tw1 or Tw3 can be made often to rise or decline 1 DEG C, compressor target frequency declines or rising 1Hz.
S320, judges that the running frequency of the compressor after turning down or tuning up is whether in [intermediate frequency, upper limiting frequency] scope.If so, then control compressor to run according to the running frequency after turning down or tuning up; If not, then control compressor to run according to described intermediate frequency or described upper limiting frequency.That is, when compressor is intermediate frequency, can not reduce the running frequency of compressor again, can only improve again, if desired reduce compressor frequency again, then the running frequency controlling compressor is that Fm is constant.Equally, the running frequency of compressor then can not improve after reaching upper limiting frequency Fu again.
It should be noted that, under Tw3-Tw1 >=20 DEG C or Ts-Tw3 >=5 DEG C condition, the adjustable range of compressor frequency is [Fm, Fu] herein, when regulating compressor operating frequency according to the water temperature change in water tank, if compressor overruns, then gets boundary value.To make compressor run at high frequencies, for water heating provides higher energy, ensure the supply of hot water.
Similar, in step S400, between described lower frequency limit and described intermediate frequency, adjust the running frequency of compressor according to the change of described upper water gentle described bottom water temperature, comprise the following steps:
S410, when detecting that described top water temperature or described bottom water temperature rise or decline, then turning down corresponding for the current operation frequency of compressor or tune up.Concrete, Tw1 or Tw3 often rises or declines 1 DEG C, compressor operating frequency decrease 2Hz or rising 1Hz.Certainly the adjustment amount that other running frequency is corresponding can be also set to.As risen or decline 1 DEG C, the corresponding decline of running frequency or rising 3Hz etc.
S420, judges that the running frequency of the compressor after turning down or tuning up is whether in [lower frequency limit, intermediate frequency] scope; If so, then control compressor to run according to the running frequency after turning down or tuning up; If not, then control compressor to run according to described lower frequency limit or described intermediate frequency.
Now the running frequency of compressor changes between lower frequency limit and intermediate frequency, when reaching boundary value, then and can only to scope internal adjustment running frequency.So, can ensure that compressor operating is under lower running frequency, prevent that the ability of air-source water heater is excessive causes unnecessary shutdown to start shooting again.
Preferably, water temperature T w2 in the middle part of water tank can also be detected simultaneously, when the running frequency of the change adjustment compressor according to described upper water gentle described bottom water temperature, adjust the running frequency of compressor too according to the middle part water temperature T w2 between the water temperature of upper water gentle described bottom.As middle part water temperature increase by 1 DEG C time, control compressor running frequency reduce 1Hz or 2Hz.
Concrete presetting the temperature difference first is 20 DEG C as shown in Figure 2, and the second default temperature difference is 5 DEG C, when the 3rd default temperature difference is also 5 DEG C, can control the frequency of compressor in accordance with the following steps.
After air-source water heater powers on and runs, according to upper limiting frequency Fu, lower frequency limit Fd and intermediate frequency Fm, the Fm=(Fu+Fd)/2 of ambient temperature setting compressor.Judge whether the upper temp Tw3 of water tank and the difference of temperature of lower Tw1 are more than or equal to 20 DEG C, and namely whether Tw3-Tw1 >=20 DEG C set up afterwards; If so, then control compressor initially to run with upper limiting frequency Fu; If not, then continue to judge whether Ts-Tw3 >=5 DEG C set up.When Ts-Tw3 >=5 DEG C, then control compressor and initially run with upper limiting frequency Fu; As Ts-Tw3 < 5 DEG C, continue to judge whether Tw3-Tw1 > 5 DEG C sets up, if so, then control compressor and initially run with intermediate frequency Fm, when Tw3-Tw1≤5 DEG C, then control compressor and run with lower frequency limit Fd.And compressor is with after intermediate frequency and upper limiting frequency operation, the water temperature detecting water tank in real time (comprises top water temperature Tw3, middle part water temperature T w2, bottom water temperature T w1) whether change, if change, then the running frequency of compressor is adjusted, if not change, continue to run.Wherein initial when running with intermediate frequency, between lower frequency limit and intermediate frequency, adjust the running frequency of compressor; When initially running with upper limiting frequency, the running frequency of compressor between intermediate frequency and upper limiting frequency.And judge whether air-source water heater reaches the condition of shutdown, if then shut down.Wherein halt condition can be set to water temperature lasting not change within a certain period of time.As water temperature in 5 minutes keeps preset temperature constant, then shut down.Certainly, halt condition also can be current other the air-source water heater used condition out of service.
Based on same inventive concept, the device that the present invention also provides a kind of compressor frequency of air-source water heater to control, the principle of dealing with problems due to this device is similar to the method that the compressor frequency of aforementioned a kind of air-source water heater controls, therefore, the enforcement of this device can realize according to the concrete steps of preceding method, repeats part and repeats no more.
The device of the compressor frequency control of the air-source water heater of one embodiment of the invention, as shown in Figure 3, comprises compressor frequency determination module 100, first judge module 200, first Executive Module 300, second Executive Module 400 and the 3rd Executive Module 500.Wherein: compressor frequency determination module 100, for upper limiting frequency and the lower frequency limit of environmentally temperature determination compressor operating, and the mean value calculating described upper limiting frequency and described lower frequency limit is as intermediate frequency; First judge module 200, the first difference and first for the top water temperature and bottom water temperature that judge water tank presets the magnitude relationship that the temperature difference and second presets the temperature difference, and the second difference of design temperature and described top water temperature and the 3rd presets the magnitude relationship of the temperature difference; First Executive Module 300, for be more than or equal to when described first difference described first preset the temperature difference or described second difference be more than or equal to the described 3rd preset the temperature difference time, control compressor to run with described upper limiting frequency, and continue the running frequency adjusting compressor according to the change of described top water temperature and described bottom water temperature between described intermediate frequency and described upper limiting frequency; Second Executive Module 400, preset the temperature difference for being greater than second when described first difference and being less than the first default temperature difference, and described second difference be less than the described 3rd preset the temperature difference time, control compressor to run with described intermediate frequency, and continue the running frequency adjusting compressor according to the change of described upper water gentle described bottom water temperature between described lower frequency limit and described intermediate frequency; 3rd Executive Module 500, presets the temperature difference for being less than or equal to described second when described first difference, and when described second difference is less than the described 3rd default temperature difference, controls compressor and run with described lower frequency limit; Wherein, the described first default temperature difference is greater than the described second default temperature difference.
The device of the compressor frequency control of the air-source water heater of the embodiment of the present invention, first according to external environment, the i.e. temperature of air-source water heater place environment, the running frequency scope of setting compressor, by running frequency segmentation, compressor is controlled for different water tank temperatures regulate under different frequency ranges, and the running frequency that under arranging different frequency range, compressor is initial.Thus according to the running frequency of the water tank temperature of air-source water heater and ambient temperature adjustment compressor, making compressor when ensureing to meet hot water demand, unlikely ability is excessive to be caused and too fastly reaches default water temperature and restart when there being demand after shutting down.The FREQUENCY CONTROL of compressor is more reasonable, and extends the service life of air-source water heater compressor, reduces high frequent and restarts the loss caused.
Wherein in an embodiment, as shown in Figure 4, compressor frequency determination module 100 comprises the first judgement submodule 110, first implementation sub-module 120, second and judges submodule 130, second implementation sub-module 140 and the 3rd implementation sub-module 150.Wherein: first judges submodule 110, for judging whether environment temperature is more than or equal to the first preset temperature; First implementation sub-module 120, for judging the judged result of submodule according to described first, when environment temperature is more than or equal to described first preset temperature, setting described upper limiting frequency is the first maximum, and setting described lower frequency limit is the first minimum of a value; Second judges submodule 130, for judging the judged result of submodule according to described first, when environment temperature is less than described first preset temperature, continues to judge whether environment temperature is greater than the second preset temperature; Second implementation sub-module 140, for judging the judged result of submodule according to described second, when environment temperature is greater than described second preset temperature, according to formula: upper limiting frequency=the first maximum+(environment temperature-the second preset temperature) * (the second maximum-the first maximum)/(the first preset temperature-the second preset temperature), sets described upper limiting frequency; According to formula: lower frequency limit=the first minimum of a value+(environment temperature-the second preset temperature) * (the second minimum of a value-the first minimum of a value)/(the first preset temperature-the second preset temperature), sets described lower limit temperature; 3rd implementation sub-module 150, for judging the judged result of submodule according to described second, when environment temperature is less than or equal to described second preset temperature, setting described upper limiting frequency is the second maximum, and setting described lower frequency limit is the second minimum of a value; Wherein, described first maximum is less than or equal to described second maximum, and described first minimum of a value is less than or equal to described second minimum of a value.
Preferably, the first preset temperature can in [30 DEG C, 35 DEG C] scope value; Second preset temperature can in scope [0 DEG C, 7 DEG C] interior value; Described first maximum can in scope [45Hz, 55Hz] interior value; Second maximum can in [80Hz, 90Hz] interior value; First minimum of a value can in [10Hz, 20Hz] scope value; Second minimum of a value can in [50Hz, 60Hz] scope value.
It is according to the running frequency of the ambient temperature determination compressor of air-source water heater place environment.When ambient temperature is higher, air-source water heater can obtain higher energy from air, now arranges lower compressor operating frequency, when ambient temperature is lower, then arranges higher compressor operating frequency, to meet hot water supply requirement.
Wherein in an embodiment, as shown in Figure 5, the first Executive Module 300 comprises first frequency adjustment submodule 310, first scope and judges submodule 320, the 4th implementation sub-module 330 and the 5th implementation sub-module 340.Wherein: first frequency adjustment submodule 310, for when detecting that described top water temperature or described bottom water temperature rise or decline, then corresponding for the current operation frequency of compressor is turned down or tune up; First scope judges submodule 320, for judging that the running frequency of the compressor after turning down or tuning up is whether in [intermediate frequency, upper limiting frequency] scope; 4th implementation sub-module 330, for judging the judgement of submodule according to described first scope, when running frequency is in scope, controls compressor and runs according to the running frequency after turning down or tuning up; 5th implementation sub-module 340, for judging the judgement of submodule according to described first scope, when running frequency is not in scope, controls compressor and runs according to described intermediate frequency or described upper limiting frequency.That is, when compressor is intermediate frequency, can not reduce the running frequency of compressor again, can only improve again, if desired reduce compressor frequency again, then the running frequency controlling compressor is that intermediate frequency is constant.Equally, the running frequency of compressor then can not improve after reaching upper limiting frequency again.
As shown in Figure 6, the second Executive Module 400 comprises second frequency adjustment submodule 410, second scope and judges submodule 420, the 6th implementation sub-module 430 and the 7th implementation sub-module 440.Wherein: second frequency adjustment submodule 410, for when detecting that described top water temperature or described bottom water temperature rise or decline, then corresponding for the current operation frequency of compressor is turned down or tune up; Second scope judges submodule 420, for judging that the running frequency of the compressor after turning down or tuning up is whether in [lower frequency limit, intermediate frequency] scope; 6th implementation sub-module 430, for judging the judged result of submodule according to described second scope, when running frequency is in scope, controls compressor and runs according to the running frequency after turning down or tuning up; 7th implementation sub-module 440, for judging the judged result of submodule according to described second scope, when running frequency is not in scope, controls compressor and runs according to described lower frequency limit or described intermediate frequency.
Now the running frequency of compressor changes between lower frequency limit and intermediate frequency, when reaching boundary value, then and can only to scope internal adjustment running frequency.So, can ensure that compressor operating is under lower running frequency, prevent that the ability of air-source water heater is excessive causes unnecessary shutdown to start shooting again.
Preferably, water temperature in the middle part of water tank can also be detected simultaneously, when the running frequency of the change adjustment compressor according to described upper water gentle described bottom water temperature, too according to the running frequency of the middle part water temperature adjustment compressor between the water temperature of upper water gentle described bottom.As middle part water temperature increase by 1 DEG C time, control compressor running frequency reduce 1Hz or 2Hz.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a method for the compressor frequency control of air-source water heater, is characterized in that, comprise the following steps:
The environmentally upper limiting frequency of temperature determination compressor operating and lower frequency limit, and the mean value calculating described upper limiting frequency and described lower frequency limit is as intermediate frequency;
Judge that the top water temperature of water tank and the first difference of bottom water temperature and first preset the magnitude relationship that the temperature difference and second presets the temperature difference, and the second difference of design temperature and described top water temperature and the 3rd presets the magnitude relationship of the temperature difference;
When described first difference is more than or equal to the described first default temperature difference or described second difference is more than or equal to the described 3rd default temperature difference, control compressor to run with described upper limiting frequency, and continue the running frequency adjusting compressor according to the change of described top water temperature and described bottom water temperature between described intermediate frequency and described upper limiting frequency;
Preset the temperature difference when described first difference is greater than second and is less than the first default temperature difference, and described second difference be less than the described 3rd preset the temperature difference time, control compressor to run with described intermediate frequency, and continue the running frequency adjusting compressor according to the change of described upper water gentle described bottom water temperature between described lower frequency limit and described intermediate frequency;
Preset the temperature difference when described first difference is less than or equal to described second, and when described second difference is less than the described 3rd default temperature difference, controls compressor and run with described lower frequency limit;
Wherein, the described first default temperature difference is greater than the described second default temperature difference.
2. the method for the compressor frequency control of air-source water heater according to claim 1, it is characterized in that, the upper limiting frequency of described environmentally temperature determination compressor operating and lower frequency limit, and the mean value calculating described upper limiting frequency and described lower frequency limit is as intermediate frequency, comprises the following steps:
Judge whether environment temperature is more than or equal to the first preset temperature;
If so, then setting described upper limiting frequency is the first maximum, and setting described lower frequency limit is the first minimum of a value;
If not, then continue to judge whether environment temperature is greater than the second preset temperature;
If so, then according to formula: upper limiting frequency=the first maximum+(environment temperature-the second preset temperature) * (the second maximum-the first maximum)/(the first preset temperature-the second preset temperature), sets described upper limiting frequency; According to formula: lower frequency limit=the first minimum of a value+(environment temperature-the second preset temperature) * (the second minimum of a value-the first minimum of a value)/(the first preset temperature-the second preset temperature), sets described lower limit temperature;
If not, then setting described upper limiting frequency is the second maximum, and setting described lower frequency limit is the second minimum of a value;
Wherein, described first maximum is less than or equal to described second maximum, and described first minimum of a value is less than or equal to described second minimum of a value.
3. the method for the compressor frequency control of air-source water heater according to claim 2, is characterized in that:
The span of described first preset temperature is: [30 DEG C, 35 DEG C]; The span of described second preset temperature is: [0 DEG C, 7 DEG C]; The span of described first maximum is: [45Hz, 55Hz]; The span of described second maximum is [80Hz, 90Hz]; The span of described first minimum of a value is: [10Hz, 20Hz]; The span of described second minimum of a value is: [50Hz, 60Hz].
4. the method for the compressor frequency control of air-source water heater according to claim 1, it is characterized in that, the described change according to described top water temperature and described bottom water temperature adjusts the running frequency of compressor between described intermediate frequency and described upper limiting frequency, comprises the following steps:
When detecting that described top water temperature or described bottom water temperature rise or decline, then corresponding for the current operation frequency of compressor is turned down or tune up;
Judge that the running frequency of the compressor after turning down or tuning up is whether in [intermediate frequency, upper limiting frequency] scope;
If so, then control compressor to run according to the running frequency after turning down or tuning up;
If not, then control compressor to run according to described intermediate frequency or described upper limiting frequency.
5. the method for the compressor frequency control of the air-source water heater according to claim 1 or 4, it is characterized in that, the described change according to described upper water gentle described bottom water temperature adjusts the running frequency of compressor between described lower frequency limit and described intermediate frequency, comprises the following steps:
When detecting that described top water temperature or described bottom water temperature rise or decline, then corresponding for the current operation frequency of compressor is turned down or tune up;
Judge that the running frequency of the compressor after turning down or tuning up is whether in [lower frequency limit, intermediate frequency] scope;
If so, then control compressor to run according to the running frequency after turning down or tuning up;
If not, then control compressor to run according to described lower frequency limit or described intermediate frequency.
6. the method for the compressor frequency control of air-source water heater according to claim 1, it is characterized in that, preset the temperature difference or described second difference and be more than or equal to the described 3rd when described first difference is more than or equal to described first and preset the temperature difference, or preset the temperature difference when described first difference is less than or equal to described second, and described second difference is less than the described 3rd when presetting the temperature difference, the step of the running frequency of the change adjustment compressor of the middle part water temperature between also comprising according to described upper water gentle described bottom water temperature;
When detecting that described middle part water temperature rises or declines, then corresponding for the current operation frequency of compressor is turned down or tune up.
7. a device for the compressor frequency control of air-source water heater, is characterized in that, comprise compressor frequency determination module, the first judge module, the first Executive Module, the second Executive Module and the 3rd Executive Module, wherein:
Described compressor frequency determination module, for upper limiting frequency and the lower frequency limit of environmentally temperature determination compressor operating, and the mean value calculating described upper limiting frequency and described lower frequency limit is as intermediate frequency;
Described first judge module, the first difference and first for the top water temperature and bottom water temperature that judge water tank presets the magnitude relationship that the temperature difference and second presets the temperature difference, and the second difference of design temperature and described top water temperature and the 3rd presets the magnitude relationship of the temperature difference;
Described first Executive Module, for be more than or equal to when described first difference described first preset the temperature difference or described second difference be more than or equal to the described 3rd preset the temperature difference time, control compressor to run with described upper limiting frequency, and continue the running frequency adjusting compressor according to the change of described top water temperature and described bottom water temperature between described intermediate frequency and described upper limiting frequency;
Described second Executive Module, preset the temperature difference for being greater than second when described first difference and being less than the first default temperature difference, and described second difference be less than the described 3rd preset the temperature difference time, control compressor to run with described intermediate frequency, and continue the running frequency adjusting compressor according to the change of described upper water gentle described bottom water temperature between described lower frequency limit and described intermediate frequency;
Described 3rd Executive Module, presets the temperature difference for being less than or equal to described second when described first difference, and when described second difference is less than the described 3rd default temperature difference, controls compressor and run with described lower frequency limit;
Wherein, the described first default temperature difference is greater than the described second default temperature difference.
8. the device of the compressor frequency control of air-source water heater according to claim 7, it is characterized in that, described compressor frequency determination module comprises the first judgement submodule, the first implementation sub-module, second judges submodule, the second implementation sub-module and the 3rd implementation sub-module, wherein:
Described first judges submodule, for judging whether environment temperature is more than or equal to the first preset temperature;
Described first implementation sub-module, for judging the judged result of submodule according to described first, when environment temperature is more than or equal to described first preset temperature, setting described upper limiting frequency is the first maximum, and setting described lower frequency limit is the first minimum of a value;
Described second judges submodule, for judging the judged result of submodule according to described first, when environment temperature is less than described first preset temperature, continues to judge whether environment temperature is greater than the second preset temperature;
Described second implementation sub-module, for judging the judged result of submodule according to described second, when environment temperature is greater than described second preset temperature, according to formula: upper limiting frequency=the first maximum+(environment temperature-the second preset temperature) * (the second maximum-the first maximum)/(the first preset temperature-the second preset temperature), sets described upper limiting frequency; According to formula: lower frequency limit=the first minimum of a value+(environment temperature-the second preset temperature) * (the second minimum of a value-the first minimum of a value)/(the first preset temperature-the second preset temperature), sets described lower limit temperature;
Described 3rd implementation sub-module, for judging the judged result of submodule according to described second, when environment temperature is less than or equal to described second preset temperature, setting described upper limiting frequency is the second maximum, and setting described lower frequency limit is the second minimum of a value;
Wherein, described first maximum is less than or equal to described second maximum, and described first minimum of a value is less than or equal to described second minimum of a value.
9. the device of the compressor frequency control of air-source water heater according to claim 8, is characterized in that:
The span of described first preset temperature is: [30 DEG C, 35 DEG C]; The span of described second preset temperature is: [0 DEG C, 7 DEG C]; The span of described first maximum is: [45Hz, 55Hz]; The span of described second maximum is [80Hz, 90Hz]; The span of described first minimum of a value is: [10Hz, 20Hz]; The span of described second minimum of a value is: [50Hz, 60Hz].
10. the device of the compressor frequency control of air-source water heater according to claim 7, is characterized in that:
Described first Executive Module comprises first frequency adjustment submodule, the first scope judges submodule, the 4th implementation sub-module and the 5th implementation sub-module, wherein:
Described first frequency adjustment submodule, for when detecting that described top water temperature or described bottom water temperature rise or decline, then turning down corresponding for the current operation frequency of compressor or tune up;
Described first scope judges submodule, for judging that the running frequency of the compressor after turning down or tuning up is whether in [intermediate frequency, upper limiting frequency] scope;
Described 4th implementation sub-module, for judging the judgement of submodule according to described first scope, when running frequency is in scope, controls compressor and runs according to the running frequency after turning down or tuning up;
Described 5th implementation sub-module, for judging the judgement of submodule according to described first scope, when running frequency is not in scope, controls compressor and runs according to described intermediate frequency or described upper limiting frequency;
Described second Executive Module comprises second frequency adjustment submodule, the second scope judges submodule, the 6th implementation sub-module and the 7th implementation sub-module, wherein:
Described second frequency adjustment submodule, for when detecting that described top water temperature or described bottom water temperature rise or decline, then turning down corresponding for the current operation frequency of compressor or tune up;
Described second scope judges submodule, for judging that the running frequency of the compressor after turning down or tuning up is whether in [lower frequency limit, intermediate frequency] scope;
Described 6th implementation sub-module, for judging the judged result of submodule according to described second scope, when running frequency is in scope, controls compressor and runs according to the running frequency after turning down or tuning up;
Described 7th implementation sub-module, for judging the judged result of submodule according to described second scope, when running frequency is not in scope, controls compressor and runs according to described lower frequency limit or described intermediate frequency.
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