CN104006592A - Frequency adjustment method and frequency adjustment device for variable-frequency compressor in heat pump system - Google Patents
Frequency adjustment method and frequency adjustment device for variable-frequency compressor in heat pump system Download PDFInfo
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- CN104006592A CN104006592A CN201410247398.9A CN201410247398A CN104006592A CN 104006592 A CN104006592 A CN 104006592A CN 201410247398 A CN201410247398 A CN 201410247398A CN 104006592 A CN104006592 A CN 104006592A
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Abstract
The invention discloses a frequency adjustment method and a frequency adjustment device for a variable-frequency compressor in a heat pump system. The frequency adjustment method comprises the following steps of: obtaining the target temperature of an intermediate heat exchanger; detecting the temperature of the intermediate heat exchanger; calculating the target frequency of the variable-frequency compressor according to the target temperature and the detected temperature; adjusting the frequency of the variable-frequency compressor by virtue of the target frequency, and adjusting the temperature of the intermediate heat exchanger by virtue of the frequency of the variable-frequency compressor until the temperature of the intermediate heat exchanger achieves the target temperature. According to the frequency adjustment method and the frequency adjustment device disclosed by the invention, the problem that energy waste is liable to cause during an adjustment on the frequency of a compressor in the prior art is solved, and then the effect of avoiding energy waste during the adjustment on the frequency of the compressor is achieved.
Description
Technical field
The present invention relates to compressor field, in particular to a kind of frequency adjustment method for heat pump frequency-changeable compressor and device.
Background technology
At present, converter technique is more and more applied in the systems such as air-conditioning, refrigeration, HVAC, frequency-changeable compressor can according to reality cold/thermic load adjusts the operating frequency of compressor drum, thereby control the refrigerant circulation and the cold medium flux that enters heat exchanger of compressor, operating frequency is higher, the flow of refrigerant is larger, and cooling/heating amount is larger, and cooling/heating ability is just stronger.When the heat pump of ordinary single-stage compression moves heating operation under condition of ultralow temperature, heating capacity decay is serious, and heating effect can not ensure, unit reliability also meets a severe test.In order to ensure heating effect, conventionally adopt frequency conversion/fixed overlapping heat pump frequently, this system is made up of two independent kind of refrigeration cycle, in its high and low temperature part is used respectively, low-temperature refrigerant.This system comprises condenser and evaporimeter, be used for making the cold-producing medium evaporation in high-temperature part at the evaporimeter of low temperature part, high-temperature part condenser quantity of heat given up, two parts are connected with an Intermediate Heat Exchanger, it is the evaporimeter of high-temperature part, it is again the condenser of low temperature part, in this system, low temperature level system adopts frequency-changeable compressor, high temperature level system adopts invariable frequency compressor, and high at low temperature level pressure of inspiration(Pi), compressor efficiency is high, evaporating temperature can be lower, and the collocation mode equipment cost of frequency conversion/fixed system is frequently low.
The prior art mode that employing is tabled look-up conventionally regulates the running frequency of compressor, sets in advance the table of an environment temperature and compressor frequency relation; In the time of compressor operating, by environment temperature temperature-sensitive bag testing environment temperature, table look-up and obtain the target frequency of compressor according to this ambient temperature value, and the frequency of compressor is adjusted.This control mode can not be guaranteed to make in any environment compressor move under optimal value of the parameter, causes the waste that compressor operating efficiency is low, cause the energy.
The problem that easily causes energy waste when the frequency to compressor regulates in prior art, not yet proposes effective solution at present.
Summary of the invention
The main purpose of the embodiment of the present invention is to provide a kind of frequency adjustment method for heat pump frequency-changeable compressor and device, to solve in prior art the problem that easily causes energy waste when the frequency to compressor regulates.
To achieve these goals, according to the embodiment of the present invention aspect, provide a kind of frequency adjustment method for heat pump frequency-changeable compressor.This heat pump comprises that Intermediate Heat Exchanger and frequency-changeable compressor comprise according to the frequency adjustment method of the embodiment of the present invention: the target temperature that obtains Intermediate Heat Exchanger; Detect the temperature of Intermediate Heat Exchanger; Target frequency according to target temperature with the temperature computation frequency-changeable compressor detecting; And by target frequency, the frequency of frequency-changeable compressor is regulated, and by the frequency of frequency-changeable compressor being regulated to the temperature of Intermediate Heat Exchanger until the temperature of Intermediate Heat Exchanger is target temperature.
Further, heat pump also comprises evaporimeter and condenser, and the target temperature that obtains Intermediate Heat Exchanger comprises: gather the temperature of evaporimeter and the temperature of condenser; The pressure that is evaporimeter by the temperature map of evaporimeter, the pressure that is condenser by the temperature map of condenser; According to the calculation of pressure goal pressure of the pressure of condenser and evaporimeter; And the goal pressure calculating is mapped as to target temperature.
Further, comprise according to the target frequency of the temperature computation frequency-changeable compressor of target temperature and Intermediate Heat Exchanger: obtain the first temperature difference and the second temperature difference, wherein, the first temperature difference is the temperature difference between current period internal object temperature and the temperature of Intermediate Heat Exchanger, the second temperature difference is the temperature difference between last cycle internal object temperature and the temperature of Intermediate Heat Exchanger, wherein, the last cycle is current period adjacent one-period before; Calculate frequency variation according to the first temperature difference and the second temperature difference; Obtain the running frequency of frequency-changeable compressor; And according to the target frequency of frequency variation and running frequency calculating frequency-changeable compressor.
Further, by target frequency, the frequency of frequency-changeable compressor is regulated and comprised: whether the temperature that detects Intermediate Heat Exchanger is identical with target temperature; If the temperature of Intermediate Heat Exchanger is not identical with target temperature, judge whether the temperature of Intermediate Heat Exchanger is greater than target temperature; In the time that the temperature of Intermediate Heat Exchanger is greater than target temperature, reduce frequency by frequency variation control frequency-changeable compressor; And in the time that the temperature of Intermediate Heat Exchanger is less than target temperature, improve frequency by frequency variation control frequency-changeable compressor.
Further, by target frequency, the frequency of frequency-changeable compressor is regulated, and by the frequency of frequency-changeable compressor being regulated to the temperature of Intermediate Heat Exchanger until the temperature of Intermediate Heat Exchanger is target temperature comprises: whether the temperature that detects Intermediate Heat Exchanger identical with target temperature; If the temperature of Intermediate Heat Exchanger is not identical with target temperature, continues to calculate target frequency, and according to the target frequency that continues to calculate, the frequency of frequency-changeable compressor is regulated, until the temperature of Intermediate Heat Exchanger is identical with target temperature.
To achieve these goals, according to the embodiment of the present invention on the other hand, provide a kind of frequency regulation arrangement for heat pump frequency-changeable compressor.Heat pump comprises that Intermediate Heat Exchanger and frequency-changeable compressor comprise according to the frequency adjustment method of the embodiment of the present invention: acquiring unit, for obtaining the target temperature of Intermediate Heat Exchanger; Detecting unit, for detection of the temperature of Intermediate Heat Exchanger; Computing unit, for the target frequency with the temperature computation frequency-changeable compressor detecting according to target temperature; And regulon, for by target frequency, the frequency of frequency-changeable compressor being regulated, and by the frequency of frequency-changeable compressor being regulated to the temperature of Intermediate Heat Exchanger until the temperature of Intermediate Heat Exchanger is target temperature.
Further, heat pump also comprises evaporimeter and condenser, it is characterized in that, acquiring unit comprises: acquisition module, for gathering the temperature of evaporimeter and the temperature of condenser; The first mapping block, for the pressure that is evaporimeter by the temperature map of evaporimeter, the pressure that is condenser by the temperature map of condenser; The first computing module, for according to the calculation of pressure goal pressure of the pressure of condenser and evaporimeter; And second mapping block, for the goal pressure calculating is mapped as to target temperature.
Further, computing unit comprises: the first acquisition module, be used for obtaining the first temperature difference and the second temperature difference, wherein, the first temperature difference is the temperature difference between current period internal object temperature and the temperature of Intermediate Heat Exchanger, the second temperature difference is the temperature difference between last cycle internal object temperature and the temperature of Intermediate Heat Exchanger, and wherein, the last cycle is current period adjacent one-period before; The second computing module, for calculating frequency variation according to the first temperature difference and the second temperature difference; The second acquisition module, for obtaining the running frequency of frequency-changeable compressor; And the 3rd computing module, for calculate the target frequency of frequency-changeable compressor according to frequency variation and running frequency.
Further, regulon comprises: whether first detection module is identical with target temperature for detection of the temperature of Intermediate Heat Exchanger; Judge module, in the time that the temperature of Intermediate Heat Exchanger is not identical with target temperature, judges whether the temperature of Intermediate Heat Exchanger is greater than target temperature; Frequency reducing module, in the time that the temperature of Intermediate Heat Exchanger is greater than target temperature, reduces frequency by frequency variation control frequency-changeable compressor; And raising frequency module, in the time that Intermediate Heat Exchanger temperature is less than target temperature, improve frequency by frequency variation control frequency-changeable compressor.
Further, regulon comprises: whether the second detection module is identical with target temperature for detection of the temperature of Intermediate Heat Exchanger; Continue module, in the time that the temperature of Intermediate Heat Exchanger is not identical with target temperature, continues calculating target frequency, and according to the target frequency that continues to calculate, the frequency of frequency-changeable compressor is regulated, until the temperature of Intermediate Heat Exchanger is identical with target temperature.
In embodiments of the present invention, adopt the target temperature that obtains Intermediate Heat Exchanger; Detect the temperature of Intermediate Heat Exchanger; Target frequency according to target temperature with the temperature computation frequency-changeable compressor detecting; And by target frequency, the frequency of frequency-changeable compressor is regulated, and by the frequency of frequency-changeable compressor being regulated to the temperature of Intermediate Heat Exchanger until the temperature of Intermediate Heat Exchanger is target temperature, when the frequency of compressor adjusting in prior art, easily cause the problem of energy waste, and then reached the effect of avoiding energy waste in the time that the frequency of compressor is regulated.
Brief description of the drawings
The accompanying drawing that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of heat pump;
Fig. 2 is according to the flow chart of the frequency adjustment method of the embodiment of the present invention;
Fig. 3 is according to the flow chart of the adjusting compressor frequency of the embodiment of the present invention;
Fig. 4 is the schematic diagram that is adjusted to target temperature according to the temperature by Intermediate Heat Exchanger of the embodiment of the present invention;
Fig. 5 is according to the schematic diagram of the frequency regulation arrangement of the embodiment of the present invention;
Fig. 6 is the schematic diagram of frequency regulation arrangement according to the preferred embodiment of the invention; And
Fig. 7 is the schematic diagram of the frequency regulation arrangement of another preferred embodiment according to the present invention.
Detailed description of the invention
In order to make those skilled in the art person understand better the present invention program, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, term " first ", " second " etc. in description of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and needn't be used for describing specific order or precedence.The data that should be appreciated that such use suitably can exchanged in situation, so as embodiments of the invention described herein can with except diagram here or describe those order enforcement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, for example, those steps or unit that process, method, system, product or the equipment that has comprised series of steps or unit is not necessarily limited to clearly list, but can comprise clearly do not list or for these processes, method, product or equipment intrinsic other step or unit.
The embodiment of the present invention provides a kind of frequency adjustment method of the frequency-changeable compressor for heat pump.
As shown in Figure 1; in heat pump, there is low-temperature circuit A and high-temperature circuit B; in low-temperature circuit A, be provided with evaporimeter 10, frequency-changeable compressor 20 and electric expansion valve 30; in high-temperature circuit B, be provided with condenser 40, invariable frequency compressor 50 and electric expansion valve 60; in this heat pump, conventionally also can be provided with Intermediate Heat Exchanger 70; connect high-temperature circuit and low-temperature circuit, wherein, Intermediate Heat Exchanger 70 comprises the condenser 701 being connected in low-temperature circuit and is connected to the evaporimeter 702 in high-temperature circuit.
In low-temperature circuit, add cold-producing medium, in evaporimeter 10, cold-producing medium absorbs the heat in outside air, in frequency-changeable compressor 20, be compressed into middle temperature gases at high pressure, enter subsequently Intermediate Heat Exchanger 70, by condenser 701 heat releases, after heat release, cold-producing medium is by the throttling of electric expansion valve 30, and the cryogenic gas cold-producing medium after throttling enters heat absorption again in evaporimeter 10.Liberated heat in Intermediate Heat Exchanger 70, the evaporimeter 702 passing through in Intermediate Heat Exchanger 70 by water in high-temperature circuit absorbs, refrigerant temperature in high-temperature circuit is raise, and be compressed into high temperature and high pressure gas through invariable frequency compressor 50 in high-temperature circuit, heat release liquefaction in condenser 40, then continues absorb the heat that in low-temperature circuit, cold-producing medium sends and gasify by getting back to after electric expansion valve 60 throttlings in Intermediate Heat Exchanger 70.The heat sending through the condenser 40 in high-temperature circuit is used for treating heating target and heats, as the water in water tank is heated or directly air heated.
Fig. 2 is according to the flow chart of embodiment of the present invention frequency adjustment method.As shown in the figure, this frequency adjustment method comprises the steps:
Step S202, obtains the target temperature of Intermediate Heat Exchanger.
Target temperature is the temperature that Intermediate Heat Exchanger need to reach, and this target temperature can obtain according to the temperature computation of the temperature of evaporimeter in heat pump and condenser.
Step S204, the temperature of detection Intermediate Heat Exchanger.The temperature of Intermediate Heat Exchanger can detect in real time by sensor, detects the actual temperature of Intermediate Heat Exchanger in running.
Step S206, the target frequency according to target temperature with the temperature computation frequency-changeable compressor detecting.The adjusting of the running frequency by frequency-changeable compressor can regulation output temperature, in the time that the running frequency of frequency-changeable compressor raises, the heat of frequency-changeable compressor output is also higher, in the time that the running frequency of frequency-changeable compressor reduces, the heat of frequency-changeable compressor output also reduces, and the heat of Intermediate Heat Exchanger obtains through frequency-changeable compressor, therefore can calculate by the temperature of Intermediate Heat Exchanger the target frequency of frequency-changeable compressor.
Step S208, regulates the frequency of frequency-changeable compressor by target frequency, and by the frequency of frequency-changeable compressor being regulated to the temperature of Intermediate Heat Exchanger until the temperature of Intermediate Heat Exchanger is target temperature.
After calculating target frequency, by target frequency, the frequency of frequency-changeable compressor is regulated, be that target temperature is identical by the adjusting of frequency-changeable compressor frequency is regulated to the temperature of Intermediate Heat Exchanger.Pass through above-described embodiment, by the temperature of Intermediate Heat Exchanger of detection and the target frequency of the target temperature calculating frequency-changeable compressor of the Intermediate Heat Exchanger getting, take into full account the performance of heat pump itself, calculate the target frequency of frequency-changeable compressor according to the parameter of heat pump itself, thereby in the time regulating the temperature of Intermediate Heat Exchanger by the frequency that regulates frequency-changeable compressor, not only the temperature of Intermediate Heat Exchanger is target temperature, can also allow heat pump move under optimum operational factor, thereby save the operation energy consumption of system, reach the effect of avoiding energy consumption waste.
Further, the method for obtaining the target temperature of Intermediate Heat Exchanger comprises: gather the temperature of evaporimeter and the temperature of condenser.The pressure that is evaporimeter by the temperature map of evaporimeter, the pressure that is condenser by the temperature map of condenser.According to the calculation of pressure goal pressure of the pressure of condenser and evaporimeter.The goal pressure calculating is mapped as to target temperature.
In heat pump, there are evaporimeter and condenser, in order to take into full account parameter and the performance of heat pump itself in the time regulating the temperature of Intermediate Heat Exchanger, can determine by the temperature of the temperature of evaporimeter and condenser the target temperature of Intermediate Heat Exchanger.Above-mentioned gatherer process can gather in real time by sensor.
Due to the physical characteristic of cold-producing medium, under cold-producing medium saturation state, temperature and the pressure of cold-producing medium have one-to-one relationship, by tabling look-up the pressure that can be evaporimeter by the temperature map of evaporimeter, be the pressure P e that the temperature T e of evaporimeter is mapped as evaporimeter, the temperature T c of condenser is mapped as the pressure P c of condenser.
Goal pressure is Pz ', goal pressure
wherein C is correction factor, and general C value is near 1.0.
Pass through
can calculate goal pressure, after calculating goal pressure, can, according to the corresponding relation of pressure and temperature, goal pressure Pz ' be mapped as to corresponding target temperature Tz '.
Pass through above-described embodiment, utilize the temperature of condenser and the temperature of evaporimeter to determine the temperature of Intermediate Heat Exchanger, in the time that the temperature that regulates Intermediate Heat Exchanger is target temperature, take into full account the performance of heat pump itself, thereby in the time regulating the temperature of Intermediate Heat Exchanger by the frequency that regulates frequency-changeable compressor, not only the temperature of Intermediate Heat Exchanger is target temperature, can also allow heat pump move under optimum operational factor, thereby save the operation energy consumption of system, reached the effect of avoiding energy consumption waste.
Further, comprise according to the target frequency of the temperature computation frequency-changeable compressor of target temperature and Intermediate Heat Exchanger:
Obtain the first temperature difference and the second temperature difference, wherein, the first temperature difference is the temperature difference between current period internal object temperature and the temperature of Intermediate Heat Exchanger, the second temperature difference is the temperature difference between last cycle internal object temperature and the temperature of Intermediate Heat Exchanger, wherein, the last cycle is current period adjacent one-period before.
The target frequency of the temperature computation frequency-changeable compressor by Intermediate Heat Exchanger, thus and be that to make the process that the temperature of Intermediate Heat Exchanger is target temperature be one-period to target frequency by adjusting the frequency of frequency-changeable compressor.Current period and previous cycle are two adjacent cycles, during with reference to the first temperature difference of current period and the second temperature difference calculated rate variable quantity in previous cycle, can avoid frequency to occur affecting the life-span of frequency-changeable compressor compared with large fluctuation, or cause the heat of output to have larger variation.That is, the first temperature difference Δ Tz=Tz'-Tz, the second temperature difference is Δ Tz'.Wherein, Tz is the temperature of the Intermediate Heat Exchanger that detects, the target temperature that Tz' is Intermediate Heat Exchanger.
According to the first temperature difference and the second temperature difference calculated rate variable quantity.Each cycle T is calculated a frequency variation Δ F, Δ F=A* (Δ Tz-Δ Tz')-B* ∫ Δ Tzdt, and wherein, Δ Tz' is the second temperature difference, and A is proportional control factor, and B is integral control coefficient, and Δ F can not exceed [Δ F
min, Δ F
max].Δ F is super while going beyond the scope, get corresponding limiting value and carry out frequency adjustment, prevent from causing the value of calculating excessive because there is unpredictable mistake in adjustment process, avoid causing that system is out of control.
Obtain the running frequency of frequency-changeable compressor.The running frequency of frequency-changeable compressor can directly be read and be obtained by frequency-changeable compressor, i.e. the current running frequency F of frequency-changeable compressor.
According to the target frequency of frequency variation and running frequency calculating frequency-changeable compressor.Target frequency F'=F+ Δ F.
The value of the frequency variation calculating by above-described embodiment may on the occasion of or negative value, because target frequency is F'=F+ Δ F, in the time that the value of frequency variation is negative value, reduce the running frequency of frequency-changeable compressor, the value of frequency variation be on the occasion of time, improve the running frequency of frequency-changeable compressor, regulate the running frequency of frequency-changeable compressor by frequency variation, thereby regulate the temperature of Intermediate Heat Exchanger.
By described target frequency, the frequency of described frequency-changeable compressor is regulated as shown in Figure 3:
Step S301, whether the temperature that detects Intermediate Heat Exchanger is identical with target temperature, i.e. Tz=Tz'.If the temperature of Intermediate Heat Exchanger is identical with target temperature, finish to adjust, if the temperature of Intermediate Heat Exchanger is not identical with target temperature, perform step S302.
Step S302, if the temperature of Intermediate Heat Exchanger is not identical with target temperature, judges whether the temperature of Intermediate Heat Exchanger is greater than target temperature, i.e. Tz > Tz'.
If the temperature of Intermediate Heat Exchanger is greater than target temperature, perform step S303, frequency reducing.Otherwise, carry out not enough S304, raising frequency.
Step S303, in the time that the temperature of Intermediate Heat Exchanger is greater than target temperature, reduces frequency, i.e. frequency reducing by frequency variation control frequency-changeable compressor.
Step S304, in the time that Intermediate Heat Exchanger temperature is less than target temperature, improves frequency, i.e. raising frequency by frequency variation control frequency-changeable compressor.
In heat pump running, several factors affects the temperature of Intermediate Heat Exchanger, for the temperature that makes Intermediate Heat Exchanger can accurately reach target temperature, if the temperature of the Intermediate Heat Exchanger after regulating does not reach target temperature, need to recalculate target frequency to reach the object of the temperature that regulates Intermediate Heat Exchanger in one-period.By target frequency, the frequency of frequency-changeable compressor is regulated, and by the frequency of frequency-changeable compressor being regulated to the temperature of Intermediate Heat Exchanger until the temperature of Intermediate Heat Exchanger is target temperature comprises:
Whether the temperature that detects Intermediate Heat Exchanger is identical with target temperature.
If the temperature of Intermediate Heat Exchanger is not identical with target temperature, continues to calculate target frequency, and according to the target frequency that continues to calculate, the frequency of frequency-changeable compressor is regulated, until the temperature of Intermediate Heat Exchanger is identical with target temperature.
If the temperature of Intermediate Heat Exchanger is identical with target temperature, stop calculating target frequency.
Below in conjunction with Fig. 4, the control method of the embodiment of the present invention is described.
First, calculate the target temperature Tz' of Intermediate Heat Exchanger, temperature difference Δ Tz between temperature and the target temperature of the Intermediate Heat Exchanger that calculating detects, collect target temperature by master chip, after the data such as temperature difference, according to these data calculated rate variable quantities, and calculate target frequency according to the running frequency of frequency variation and frequency-changeable compressor, utilize the frequency of target frequency control frequency converter, thereby control the operation of compressor, along with the rising of frequency, the temperature of Intermediate Heat Exchanger raises, along with the reduction of frequency, the temperature of Intermediate Heat Exchanger reduces, detecting the now temperature of Intermediate Heat Exchanger is Tz.
The temperature of the Intermediate Heat Exchanger after overregulating is obtained by the temperature-sensitive bag of Intermediate Heat Exchanger, now detects that temperature may be that Intermediate Heat Exchanger is received disturbance quantity interference temperature afterwards.If now the temperature of Intermediate Heat Exchanger is not identical with target temperature, continue to calculate target temperature, and calculate target frequency to pass through the temperature of the frequency adjustment Intermediate Heat Exchanger of compressor, finally reach the temperature object identical with target temperature that Intermediate Heat Exchanger detects.
Pass through above-described embodiment, in the time regulating the temperature of Intermediate Heat Exchanger, determine target temperature by gathering the temperature of evaporimeter and the temperature of condenser, and determine the running frequency of compressor with reference to frequency variation that ought be last time and previous frequency variation, improve the temperature of Intermediate Heat Exchanger by the frequency of rising compressor, the frequency that reduces compressor reduces the temperature of Intermediate Heat Exchanger, carries out above-mentioned steps make the temperature of final Intermediate Heat Exchanger identical with target temperature by circulation.
It should be noted that, for aforesaid each embodiment of the method, for simple description, therefore it is all expressed as to a series of combination of actions, but those skilled in the art should know, the present invention is not subject to the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in description all belongs to preferred embodiment, and related action and module might not be that the present invention is necessary.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that can add essential general hardware platform by software according to the method for above-described embodiment and realize, can certainly pass through hardware, but in a lot of situation, the former is better embodiment.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium (as ROM/RAM, magnetic disc, CD), comprise that some instructions (can be mobile phones in order to make a station terminal equipment, computer, server, or the network equipment etc.) carry out the method for each embodiment of the present invention.
According to the embodiment of the present invention, also provide a kind of for implementing the frequency regulation arrangement of said frequencies control method, this frequency regulation arrangement is mainly used in carrying out the frequency adjustment method that embodiment of the present invention foregoing provides, below frequency regulation arrangement that the embodiment of the present invention is provided do concrete introduction:
Fig. 5 is according to the schematic diagram of the frequency regulation arrangement of the embodiment of the present invention.As shown in the figure, this frequency regulation arrangement comprises: acquiring unit 10, detecting unit 20, computing unit 30 and regulon 40.
Acquiring unit 10 is for obtaining the target temperature of Intermediate Heat Exchanger.
Target temperature is the temperature that Intermediate Heat Exchanger need to reach, and this target temperature can obtain according to the temperature computation of the temperature of evaporimeter in heat pump and condenser.
Detecting unit 20 is for detection of the temperature of Intermediate Heat Exchanger.The temperature of Intermediate Heat Exchanger can detect in real time by sensor, detects the actual temperature of Intermediate Heat Exchanger in running.
Computing unit 30 is for the target frequency with the temperature computation frequency-changeable compressor detecting according to target temperature.The adjusting of the running frequency by frequency-changeable compressor can regulation output temperature, in the time that the running frequency of frequency-changeable compressor raises, the heat of frequency-changeable compressor output is also higher, in the time that the running frequency of frequency-changeable compressor reduces, the heat of frequency-changeable compressor output also reduces, and the heat of Intermediate Heat Exchanger obtains through frequency-changeable compressor, therefore can calculate by the temperature of Intermediate Heat Exchanger the target frequency of frequency-changeable compressor.
Regulon 40 is for by target frequency, the frequency of frequency-changeable compressor being regulated, and by the frequency of frequency-changeable compressor being regulated to the temperature of Intermediate Heat Exchanger until the temperature of Intermediate Heat Exchanger is target temperature.
After calculating target frequency, by target frequency, the frequency of frequency-changeable compressor is regulated, be that target temperature is identical by the adjusting of frequency-changeable compressor frequency is regulated to the temperature of Intermediate Heat Exchanger.Pass through above-described embodiment, by the temperature of Intermediate Heat Exchanger of detection and the target frequency of the target temperature calculating frequency-changeable compressor of the Intermediate Heat Exchanger getting, take into full account the performance of heat pump itself, calculate the target frequency of frequency-changeable compressor according to the parameter of heat pump itself, thereby in the time regulating the temperature of Intermediate Heat Exchanger by the frequency that regulates frequency-changeable compressor, not only the temperature of Intermediate Heat Exchanger is target temperature, can also allow heat pump move under optimum operational factor, thereby save the operation energy consumption of system, reach the effect of avoiding energy consumption waste.
Further, acquiring unit comprises: acquisition module, the first mapping block, the first computing module and the second mapping block.
Acquisition module is for gathering the temperature of evaporimeter and the temperature of condenser.The pressure that it is evaporimeter by the temperature map of evaporimeter that the first mapping block is used for, the pressure that is condenser by the temperature map of condenser.The first computing module is used for according to the calculation of pressure goal pressure of the pressure of condenser and evaporimeter.The second mapping block is for being mapped as target temperature by the goal pressure calculating.
In heat pump, there are evaporimeter and condenser, in order to take into full account parameter and the performance of heat pump itself in the time regulating the temperature of Intermediate Heat Exchanger, can determine by the temperature of the temperature of evaporimeter and condenser the target temperature of Intermediate Heat Exchanger.Above-mentioned gatherer process can gather in real time by sensor.
Due to the physical characteristic of cold-producing medium, the temperature of cold-producing medium and the pressure of cold-producing medium have one-to-one relationship, by tabling look-up the pressure that can be evaporimeter by the temperature map of evaporimeter, be the pressure P e that the temperature T e of evaporimeter is mapped as evaporimeter, the temperature T c of condenser is mapped as the pressure P c of condenser.
Goal pressure is Pz ', goal pressure
wherein C is correction factor, and general C value is near 1.0.
Pass through
can calculate goal pressure, after calculating goal pressure, can, according to the corresponding relation of pressure and temperature, goal pressure Pz ' be mapped as to corresponding target temperature Tz '.
Pass through above-described embodiment, utilize the temperature of condenser and the temperature of evaporimeter to determine the temperature of Intermediate Heat Exchanger, in the time that the temperature that regulates Intermediate Heat Exchanger is target temperature, take into full account the performance of heat pump itself, thereby in the time regulating the temperature of Intermediate Heat Exchanger by the frequency that regulates frequency-changeable compressor, not only the temperature of Intermediate Heat Exchanger is target temperature, can also allow heat pump move under optimum operational factor, thereby save the operation energy consumption of system, reached the effect of avoiding energy consumption waste.
Further, calculate the target frequency of frequency-changeable compressor as shown in Figure 6, this computing unit 30 comprises: the first acquisition module 301, the second computing module 302, the second acquisition module 303 and the 3rd computing module 304.The first acquisition module 301, be used for obtaining the first temperature difference and the second temperature difference, wherein, the first temperature difference is the temperature difference between current period internal object temperature and the temperature of Intermediate Heat Exchanger, the second temperature difference is the temperature difference between last cycle internal object temperature and the temperature of Intermediate Heat Exchanger, wherein, the last cycle is current period adjacent one-period before.
The target frequency of the temperature computation frequency-changeable compressor by Intermediate Heat Exchanger, thus and be that to make the process that the temperature of Intermediate Heat Exchanger is target temperature be one-period to target frequency by adjusting the frequency of frequency-changeable compressor.Current period and previous cycle are two adjacent cycles, during with reference to the first temperature difference of current period and the second temperature difference calculated rate variable quantity in previous cycle, can avoid frequency to occur affecting the life-span of frequency-changeable compressor compared with large fluctuation, or cause the heat of output to have larger variation.That is, the first temperature difference Δ Tz=Tz'-Tz, the second temperature difference is Δ Tz'.Wherein, Tz is the temperature of the Intermediate Heat Exchanger that detects, the target temperature that Tz' is Intermediate Heat Exchanger.
The second computing module 302, for calculating frequency variation according to the first temperature difference and the second temperature difference.Each execution cycle T calculates a frequency variation Δ F, Δ F=A* (Δ Tz-Δ Tz')-B* ∫ Δ Tzdt, and wherein, Δ Tz' is the second temperature difference, and A is proportional control factor, and B is integral control coefficient, and Δ F can not exceed [Δ F
min, Δ F
max].Δ F is super while going beyond the scope, get corresponding limiting value and carry out frequency adjustment, prevent from causing the value of calculating excessive because there is unpredictable mistake in adjustment process, avoid causing that system is out of control.
The second acquisition module 303, for obtaining the running frequency of frequency-changeable compressor.And the running frequency of frequency-changeable compressor can directly be read and be obtained by frequency-changeable compressor, be i.e. the current running frequency F of frequency-changeable compressor.
The 3rd computing module 304, for calculating the target frequency of frequency-changeable compressor according to frequency variation and running frequency.Target frequency F'=F+ Δ F.
The value of the frequency variation calculating by above-described embodiment may on the occasion of or negative value, because target frequency is F'=F+ Δ F, in the time that the value of frequency variation is negative value, reduce the running frequency of frequency-changeable compressor, the value of frequency variation be on the occasion of time, improve the running frequency of frequency-changeable compressor, regulate the running frequency of frequency-changeable compressor by frequency variation, thereby regulate the temperature of Intermediate Heat Exchanger.
Further, the regulon 40 frequency of frequency-changeable compressor being regulated by target frequency as shown in Figure 7, comprising: first detection module 401, judge module 402, frequency reducing module 403 and raising frequency module 404.
Whether first detection module 401 is identical with target temperature for detection of the temperature of Intermediate Heat Exchanger, i.e. Tz=Tz'.If the temperature of Intermediate Heat Exchanger is identical with target temperature, finish to adjust, if the temperature of Intermediate Heat Exchanger is not identical with target temperature, utilize judge module to judge.
Judge module 402, in the time that the temperature of Intermediate Heat Exchanger is not identical with target temperature, judges whether the temperature of Intermediate Heat Exchanger is greater than target temperature, i.e. Tz > Tz'.If the temperature of Intermediate Heat Exchanger is greater than target temperature, utilize frequency reducing module to carry out frequency reducing, otherwise, utilize raising frequency module to carry out raising frequency.
Frequency reducing module 403, in the time that the temperature of Intermediate Heat Exchanger is greater than target temperature, reduces frequency by frequency variation control frequency-changeable compressor.And
Raising frequency module 404, in the time that Intermediate Heat Exchanger temperature is less than target temperature, improves frequency by frequency variation control frequency-changeable compressor.
In heat pump running, several factors affects the temperature of Intermediate Heat Exchanger, for the temperature that makes Intermediate Heat Exchanger can accurately reach target temperature, if the temperature of the Intermediate Heat Exchanger after regulating does not reach target temperature, need to recalculate target frequency to reach the object of the temperature that regulates Intermediate Heat Exchanger in one-period.Be that regulon comprises the second detection module and continues module, the frequency of frequency-changeable compressor is regulated by target frequency, and by the frequency of frequency-changeable compressor being regulated to the temperature of Intermediate Heat Exchanger until the temperature of Intermediate Heat Exchanger is target temperature, wherein:
Whether the second detection module is identical with target temperature for detection of the temperature of Intermediate Heat Exchanger.
Continue module, in the time that the temperature of Intermediate Heat Exchanger is not identical with target temperature, continues calculating target frequency, and according to the target frequency that continues to calculate, the frequency of frequency-changeable compressor is regulated, until the temperature of Intermediate Heat Exchanger is identical with target temperature.
As shown in Figure 4, first, acquiring unit is calculated the target temperature Tz' of Intermediate Heat Exchanger, temperature difference Δ Tz between temperature and the target temperature of the Intermediate Heat Exchanger that the first acquisition module calculating detects, collect target temperature by master chip, after the data such as temperature difference, the second computing module is according to these data calculated rate variable quantities, and calculate target frequency according to the running frequency of frequency variation and frequency-changeable compressor, utilize the frequency of target frequency control frequency converter, thereby control the operation of compressor, along with the rising of frequency, the temperature of Intermediate Heat Exchanger raises, along with the reduction of frequency, the temperature of Intermediate Heat Exchanger reduces, detecting the now temperature of Intermediate Heat Exchanger is Tz.
The temperature of the Intermediate Heat Exchanger after overregulating is obtained by the temperature-sensitive bag of Intermediate Heat Exchanger, now detects that temperature may be that Intermediate Heat Exchanger is received disturbance quantity interference temperature afterwards.If now the temperature of Intermediate Heat Exchanger is not identical with target temperature, continue to calculate target temperature, and calculate target frequency to pass through the temperature of the frequency adjustment Intermediate Heat Exchanger of compressor, finally reach the temperature object identical with target temperature that Intermediate Heat Exchanger detects.
Pass through above-described embodiment, in the time regulating the temperature of Intermediate Heat Exchanger, determine target temperature by gathering the temperature of evaporimeter and the temperature of condenser, and determine the running frequency of compressor with reference to frequency variation that ought be last time and previous frequency variation, improve the temperature of Intermediate Heat Exchanger by the frequency of rising compressor, the frequency that reduces compressor reduces the temperature of Intermediate Heat Exchanger, carries out above-mentioned steps make the temperature of final Intermediate Heat Exchanger identical with target temperature by circulation.
In the above embodiment of the present invention, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part of detailed description, can be referring to the associated description of other embodiment.
In the several embodiment that provide in the application, should be understood that disclosed client can realize by another way.Wherein, device embodiment described above is only schematic, the division of for example unit, be only that a kind of logic function is divided, when actual realization, can there is other dividing mode, for example multiple unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING of unit or module or communication connection can be electrical or other form.
Unit as separating component explanation can or can not be also physically to separate, and the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed on multiple NEs.Can select according to the actual needs some or all of unit wherein to realize the object of the present embodiment scheme.
In addition, the each functional unit in each embodiment of the present invention can be integrated in a processing unit, can be also that the independent physics of unit exists, and also can be integrated in a unit two or more unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, and also can adopt the form of SFU software functional unit to realize.
Below be only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. for a frequency adjustment method for heat pump frequency-changeable compressor, described heat pump comprises Intermediate Heat Exchanger and frequency-changeable compressor, it is characterized in that, comprising:
Obtain the target temperature of described Intermediate Heat Exchanger;
Detect the temperature of described Intermediate Heat Exchanger;
Target frequency according to described target temperature with frequency-changeable compressor described in the temperature computation detecting; And
By described target frequency, the frequency of described frequency-changeable compressor is regulated, and by the frequency of described frequency-changeable compressor being regulated to the temperature of described Intermediate Heat Exchanger until the temperature of described Intermediate Heat Exchanger is described target temperature.
2. method according to claim 1, is characterized in that, described heat pump also comprises evaporimeter and condenser, and the target temperature that obtains Intermediate Heat Exchanger comprises:
Gather the temperature of described evaporimeter and the temperature of described condenser;
The pressure that is described evaporimeter by the temperature map of described evaporimeter, the pressure that is described condenser by the temperature map of described condenser;
According to the calculation of pressure goal pressure of the pressure of described condenser and described evaporimeter; And
The goal pressure calculating is mapped as to described target temperature.
3. method according to claim 1, is characterized in that, comprises according to the target frequency of frequency-changeable compressor described in the temperature computation of described target temperature and described Intermediate Heat Exchanger:
Obtain the first temperature difference and the second temperature difference, wherein, described the first temperature difference is the temperature difference between the interior described target temperature of current period and the temperature of described Intermediate Heat Exchanger, described the second temperature difference is the temperature difference between interior described target temperature of last cycle and the temperature of described Intermediate Heat Exchanger, wherein, the described last cycle is described current period adjacent one-period before;
Calculate frequency variation according to described the first temperature difference and described the second temperature difference;
Obtain the running frequency of described frequency-changeable compressor; And
Calculate the target frequency of described frequency-changeable compressor according to described frequency variation and described running frequency.
4. method according to claim 3, is characterized in that, by described target frequency, the frequency of described frequency-changeable compressor is regulated and is comprised:
Whether the temperature that detects described Intermediate Heat Exchanger is identical with described target temperature;
If the temperature of described Intermediate Heat Exchanger is not identical with described target temperature, judge whether the temperature of described Intermediate Heat Exchanger is greater than described target temperature;
In the time that the temperature of described Intermediate Heat Exchanger is greater than described target temperature, reduce frequency by frequency-changeable compressor described in described frequency variation control; And
In the time that the temperature of described Intermediate Heat Exchanger is less than described target temperature, improve frequency by frequency-changeable compressor described in described frequency variation control.
5. according to the method described in any one in claim 1 to 4, it is characterized in that, by described target frequency, the frequency of described frequency-changeable compressor is regulated, and by the frequency of described frequency-changeable compressor being regulated to the temperature of described Intermediate Heat Exchanger until the temperature of described Intermediate Heat Exchanger is described target temperature comprises:
Whether the temperature that detects described Intermediate Heat Exchanger is identical with described target temperature;
If the temperature of described Intermediate Heat Exchanger is not identical with described target temperature, continue to calculate described target frequency, and according to the target frequency that continues to calculate, the frequency of described frequency-changeable compressor is regulated, until the temperature of described Intermediate Heat Exchanger is identical with described target temperature.
6. for a frequency regulation arrangement for heat pump frequency-changeable compressor, it is characterized in that, described heat pump comprises Intermediate Heat Exchanger and frequency-changeable compressor, it is characterized in that, comprising:
Acquiring unit, for obtaining the target temperature of described Intermediate Heat Exchanger;
Detecting unit, for detection of the temperature of described Intermediate Heat Exchanger;
Computing unit, for the target frequency with frequency-changeable compressor described in the temperature computation detecting according to described target temperature; And
Regulon, for by described target frequency, the frequency of described frequency-changeable compressor being regulated, and by the frequency of described frequency-changeable compressor being regulated to the temperature of described Intermediate Heat Exchanger until the temperature of described Intermediate Heat Exchanger is described target temperature.
7. device according to claim 6, described heat pump also comprises evaporimeter and condenser, it is characterized in that, described acquiring unit comprises:
Acquisition module, for gathering the temperature of described evaporimeter and the temperature of described condenser;
The first mapping block, for the pressure that is described evaporimeter by the temperature map of described evaporimeter, the pressure that is described condenser by the temperature map of described condenser;
The first computing module, for according to the calculation of pressure goal pressure of the pressure of described condenser and described evaporimeter; And
The second mapping block, for being mapped as described target temperature by the goal pressure calculating.
8. device according to claim 6, is characterized in that, described computing unit comprises:
The first acquisition module, be used for obtaining the first temperature difference and the second temperature difference, wherein, described the first temperature difference is the temperature difference between the interior described target temperature of current period and the temperature of described Intermediate Heat Exchanger, described the second temperature difference is the temperature difference between interior described target temperature of last cycle and the temperature of described Intermediate Heat Exchanger, wherein, the described last cycle is described current period adjacent one-period before;
The second computing module, for calculating frequency variation according to described the first temperature difference and described the second temperature difference;
The second acquisition module, for obtaining the running frequency of described frequency-changeable compressor; And
The 3rd computing module, for calculating the target frequency of described frequency-changeable compressor according to described frequency variation and described running frequency.
9. device according to claim 8, is characterized in that, described regulon comprises:
Whether first detection module is identical with described target temperature for detection of the temperature of described Intermediate Heat Exchanger;
Judge module, in the time that the temperature of described Intermediate Heat Exchanger is not identical with described target temperature, judges whether the temperature of described Intermediate Heat Exchanger is greater than described target temperature;
Frequency reducing module, in the time that the temperature of described Intermediate Heat Exchanger is greater than described target temperature, reduces frequency by frequency-changeable compressor described in described frequency variation control; And
Raising frequency module, in the time that described Intermediate Heat Exchanger temperature is less than described target temperature, improves frequency by frequency-changeable compressor described in described frequency variation control.
10. device according to claim 6, is characterized in that, described regulon comprises:
Whether the second detection module is identical with described target temperature for detection of the temperature of described Intermediate Heat Exchanger;
Continue module, for in the time that the temperature of described Intermediate Heat Exchanger is not identical with described target temperature, continue to calculate described target frequency, and according to the target frequency that continues to calculate, the frequency of described frequency-changeable compressor is regulated, until the temperature of described Intermediate Heat Exchanger is identical with described target temperature.
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