CN107238174A - The control method and device of compressor frequency - Google Patents

The control method and device of compressor frequency Download PDF

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Publication number
CN107238174A
CN107238174A CN201710391612.1A CN201710391612A CN107238174A CN 107238174 A CN107238174 A CN 107238174A CN 201710391612 A CN201710391612 A CN 201710391612A CN 107238174 A CN107238174 A CN 107238174A
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China
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span
temperature
compressor
frequency
rate
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CN201710391612.1A
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CN107238174B (en
Inventor
张世航
肖彪
何林
张威
舒宏
贺春辉
曾奕
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Abstract

The invention discloses a kind of control method of compressor frequency and device.Wherein, this method includes:Obtain the rate of change of water temperature in air-conditioner set grey water system;The span belonging to rate of change is determined according to rate of change;The conversion system of compressor in air-conditioning unit is adjusted according to span.The present invention solves existing frequency conversion air-conditioning system because the time that water system capacity difference causes frequent shutdown or extended to up to target temperature causes the technical problem of Consumer's Experience effect difference.

Description

The control method and device of compressor frequency
Technical field
The present invention relates to home wiring control field, in particular to the control method and device of a kind of compressor frequency.
Background technology
In recent years, Central China and northern area, will consume substantial amounts of primary energy (for example, coal) to supply every year Warm, primary energy is used so that global environment constantly deteriorates, for example, haze, sandstorm etc..In order to ensure in not welding On the premise of meet the demand of warming, summer cooling, " coal changes electricity " is so that enforcement difficulty is small, instant effect the characteristics of, as working as The effective measures of preceding preventing and treating environmental pollution, under the driving of " coal changes electricity " project, residential central air- unit is (also known as in family Centre air-conditioning or residential central air conditioning) arise at the historic moment.Residential central air- unit is to be used as cold and hot medium by water system to be conveyed to A home from home is provided in room, it is built-in to determine frequency water pump, but because user uses the environmental condition otherness of residential central air- It is larger, for example, room vary, have have few, pipeline, which is connected with series connection, also a parallel connection, and the length of pipeline has with short, this A little environmental differences can cause the capacity of the whole water system of actual installation to vary.
Convertible frequency air-conditioner due to can automatically adjust compressor frequency according to current environmental temperature, realize " not shutting down operating " with Maintain environment temperature constant, compared with fixed frequency air conditioner, the energy-saving effect of convertible frequency air-conditioner is more preferable, thus, also it is applied in the formula of family Entreat air-conditioning system.It is typically in specified water-carrying capacity, medium however, the compressor variable frequency control program of residential central air- unit Designed under water system capacity conditions, in the case where setting a certain cooling or heat supply temperature, on the one hand, compressor may be because of water system System capacity is too small and causes cooling or heating rate too fast, so that being shut down beyond temperature setting range limit value, is used as tool There is the air-conditioning system of VFC, shut down if reaching temperature spot, imply that change yupin effect is poor, with fixed frequency air conditioner unit Effect is similar, and longtime running is unable to reach energy-saving effect;On the other hand, compressor causes as water system capacity is excessive Cooling or heating rate are excessively slow, and it is frequency reducing occur to reach compressor before temperature set-point, elongate the time for reaching temperature spot, influence The comfortableness and satisfaction of user.
For it is above-mentioned the problem of, effective solution is not yet proposed at present.
The content of the invention
The embodiments of the invention provide a kind of control method of compressor frequency and device, at least to solve existing frequency conversion Air-conditioning system causes user's body due to the time that water system capacity difference causes frequent shutdown or extended to up to target temperature Test the technical problem of effect difference.
One side according to embodiments of the present invention there is provided a kind of control method of compressor frequency, including:Obtain empty Adjust the rate of change of water temperature in unit grey water system;And span belonging to rate of change is determined according to rate of change;According to The conversion system of compressor in air-conditioning unit is adjusted according to span.
Another aspect according to embodiments of the present invention, additionally provides a kind of control device of compressor frequency, including:Obtain Module, the rate of change for obtaining water temperature in air-conditioner set grey water system;And determining module, for true according to rate of change Determine the span belonging to rate of change;Adjusting module, the frequency conversion for adjusting compressor in air-conditioning unit according to span Mode.
Another aspect according to embodiments of the present invention, additionally provides a kind of storage medium, and storage medium includes the journey of storage Sequence, wherein, program performs the control method of above-mentioned compressor frequency.
Another aspect according to embodiments of the present invention, additionally provides a kind of processor, and processor is used for operation program, its In, program performs the control method of above-mentioned compressor frequency when running.
In embodiments of the present invention, by obtaining the rate of change of water temperature in air-conditioner set grey water system;And according to change Change speed determines the span belonging to rate of change;The conversion system of compressor in air-conditioning unit is adjusted according to span, Reach according to the rate of change of water temperature in air-conditioner water system come anticipation water system amount of capacity, so it is big according to water system capacity The small purpose being adjusted come the conversion system to compressor of air conditioner, it is achieved thereby that being reduced in the case where water system capacity is small The phenomenon that air-conditioning is shut down, and the technique effect of target temperature value is reached in the case where water system capacity is big as early as possible, and then solve Existing frequency conversion air-conditioning system determined because water system capacity difference causes frequent shutdown or extends to up to target temperature Time causes the technical problem of Consumer's Experience effect difference.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this hair Bright schematic description and description is used to explain the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is a kind of control method flow chart of compressor frequency according to embodiments of the present invention;
Fig. 2 (a) is that overtemperature protection occurs in compressor during a kind of optional air-conditioning heating according to embodiments of the present invention The process schematic of shutdown;
Fig. 2 (b) is the change signal of temperature rise rate during a kind of optional air-conditioning heating according to embodiments of the present invention Figure;
Fig. 3 is a kind of control method flow chart of optional compressor frequency according to embodiments of the present invention;
Fig. 4 is a kind of control method flow chart of optional compressor frequency according to embodiments of the present invention;
Fig. 5 is a kind of control method flow chart of optional compressor frequency according to embodiments of the present invention;
Fig. 6 is a kind of control method flow chart of optional compressor frequency according to embodiments of the present invention;
Fig. 7 is a kind of optional residential central air- scheme of installation according to embodiments of the present invention;And
Fig. 8 is a kind of control device schematic diagram of compressor frequency according to embodiments of the present invention.
Embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention Accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only The embodiment of a part of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people The every other embodiment that member is obtained under the premise of creative work is not made, should all belong to the model that the present invention is protected Enclose.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, " Two " etc. be for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so using Data can exchange in the appropriate case, so as to embodiments of the invention described herein can with except illustrating herein or Order beyond those of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that cover Lid is non-exclusive to be included, for example, the process, method, system, product or the equipment that contain series of steps or unit are not necessarily limited to Those steps or unit clearly listed, but may include not list clearly or for these processes, method, product Or the intrinsic other steps of equipment or unit.
Embodiment 1
According to embodiments of the present invention there is provided a kind of control method embodiment of compressor frequency, it is necessary to explanation, The step of flow of accompanying drawing is illustrated can perform in the computer system of such as one group computer executable instructions, also, , in some cases, can be shown to be performed different from order herein although showing logical order in flow charts The step of going out or describe.
Fig. 1 is a kind of control method flow chart of compressor frequency according to embodiments of the present invention, as shown in figure 1, the party Method comprises the following steps:
Step S102, obtains the rate of change of water temperature in air-conditioner set grey water system.
Specifically, in above-mentioned steps, above-mentioned air-conditioner set can be for room conditioning load be focused on, and will be produced Cold (heat) measure and by water system be transferred to each air-conditioned room to realize the residential central air- of room air regulation (also referred to as Residential central air conditioning, household central air conditioner etc.), it is the Air Conditioning System of a miniaturization;The change of water temperature in above-mentioned water system Changing speed includes temperature rise rate and temperature drop rate, wherein, temperature rise rate refers to the elevated speed of temperature, and temperature drop rate refers to temperature The speed of reduction.
Herein it should be noted that due to the difference of water system amount of capacity, setting identical cooling or heat supply temperature In the case of, that speed (is raised and lowered) is also different for the change of water temperature in water system;And existing residential central air- unit is (mainly For frequency conversion residential central air-) compressor variable frequency is set generally according to specified water capacity or medium water capacity, such as fruit Border water system capacity is too small, then the water temperature rate of change of water system is very fast, and water temperature easily exceeds design temperature scope, causes compression Machine is shut down;If actual water system capacity is excessive, the water temperature rate of change of water system is slower, causes water temperature to reach design temperature The time of value can be very long, influences user's comfortableness.
As a kind of optional embodiment, the application is illustrated by taking frequency conversion integrated indoor central air-conditioner unit as an example, Frequency conversion integrated indoor central air-conditioner unit is the source pump for integrating refrigeration, heating, and unit is typically using environmentally friendly refrigerant R410A, by Dual-level enthalpy adding compressor, converter technique, improve Unit Low heating capacity and high-temperature refrigeration ability, expand unit Range of operation and outlet water temperature range, can meet the low temperature heating demand of cold district, and summer high-temperature air-conditioning need can be met again Ask.Suitable for increasing high-grade apartment, compound building, senior villa and unit office building, dining room, shop, public place of entertainment Deng space.Frequency conversion integrated indoor central air-conditioner system is mainly made up of three parts:1. frequency conversion integrated indoor central air-conditioner main frame; 2. end-equipment;3. water system etc..
Step S104, the span belonging to rate of change is determined according to rate of change.
Specifically, in above-mentioned steps, above-mentioned span can be the scope of default one or more rate of changes Value, after the rate of change of water temperature in getting air-conditioner set water system, it can be determined that the rate of change institute of water temperature in water system Interval range, wherein, the different compressor variable frequency modes of different spans correspondences.
Herein it should be noted that the conversion system of above-mentioned compressor includes but is not limited to improve the frequency of compressor, drop What the frequency of low compressor, the constant frequency of maintenance compressor, control compressor shutdown, raising or reduction compressor frequency changed Speed, improve in advance.
Step S106, the conversion system of compressor in air-conditioning unit is adjusted according to span.
Specifically, in above-mentioned steps, it is determined that after span in air-conditioner water system belonging to the rate of change of water temperature, Obtain conversion system corresponding with the span, and the work frequency of the compressor according to conversion system adjustment air-conditioner set Rate.
Herein it should be noted that because water system capacity is too small, the water temperature rate of change of water system is very fast, and water temperature is easy Beyond design temperature scope, cause compressor shutdown;And water system capacity is excessive, the water temperature rate of change of water system is slower, can Water temperature can be caused to reach that the time of set temperature value can be very long.Thus, based on side disclosed in above-mentioned steps S102 to S106 Case, the rate of change of water temperature that can be in air-conditioner water system determines the capacity of water system, and then when water system capacity is small In the case of, before water temperature is raised or lowered to target temperature value, the frequency of compressor is reduced in advance, so as to prevent water temperature More than design temperature scope;In the case that water system capacity is big, before water temperature is raised or lowered to target temperature value, delay The frequency of compressor is reduced, so as to reach target temperature as early as possible.
As a kind of optional embodiment, enter below by taking the heating mode of frequency conversion integrated indoor central air-conditioner unit as an example Row explanation, there is overheat guarantor in compressor during Fig. 2 (a) show a kind of optional air-conditioning heating according to embodiments of the present invention The process schematic shut down is protected, shown in such as Fig. 2 (a), Δ T=presets leaving water temperature-current leaving water temperature, it is assumed that air-conditioning is set Leaving water temperature be 50 DEG C, compressor frequency can undergo substantially five stages in heating operations:
Stage one:More than 5 DEG C of Δ T >, compressor frequency fast lifting, complete machine input current, power increase on year-on-year basis;
Stage two:5 DEG C >=Δ T >=1 DEG C, compressor frequency is slowly lifted, and complete machine input current, power slowly increase;
Stage three:1 DEG C of 0 DEG C of > Δ T >, compressor frequency is limited and then slowly declines, and complete machine input current, power reach Slowly reduced after peak value;
Stage four:0 DEG C >=Δ T >=-2 DEG C, compressor frequency rapid decrease, complete machine input current, power are fallen on a year-on-year basis.
Stage five:, there is the anti-overheat (+2 DEG C of design temperature) of hot water, compressor shutdown in < -2 DEG C of Δ T.
Increase because water system turnover coolant-temperature gage is substantially linear, thus, it is possible to pass through the intelligent anticipation water system of temperature rise rate System amount of capacity, so that compressor is controlled accordingly according to the capacity of air-conditioner water system, when water system capacity is small, temperature Before drop, temperature rise to set point (i.e. target temperature value), compressor frequency drops in limit in advance;When water system capacity is big, temperature drop, temperature rise Delay limit drop compressor frequency before to set point, had both been avoided that temperature spot was shut down, comfortableness, temperature control accuracy can be improved again. Fig. 2 (b) show the change schematic diagram of temperature rise rate during air-conditioning heating, and temperature rise rate is big, illustrates that water system capacity is small;Temperature Raising speed rate is small, illustrates that water system capacity is big.As shown in Fig. 2 (b), when scope of the temperature rise rate 0 to V1, illustrate that water system is held Amount is big, and temperature rise rate is slow, does not reach up to set water temperature, wherein, V1 may be the case that under maximum critical speed;When Temperature rise rate illustrates that water system capacity is moderate in V1 to V2 scope, and compressor frequency can be according to regular logical control;Work as temperature Raising speed rate is when V2 is to infinity, and temperature rise rate is fast, illustrates that water system capacity is small, water temperature is easy to go out set water temperature, occurs Overheat shut down, wherein, V2 may be the case that under minimum critical speed.
From the foregoing, it will be observed that in the above embodiments of the present application, by obtaining the rate of change of the water temperature in air-conditioner water system, root The size of air-conditioner water system capacity can be gone out with anticipation according to the span belonging to the rate of change of water temperature in water system, so that according to Water system capacity is adjusted come the conversion system to compressor of air conditioner, in a kind of optional embodiment, when water system capacity When smaller (i.e. the rate of change of water temperature is very fast in water system), the working frequency of compressor can be reduced in advance;When water system is held When measuring larger (i.e. the rate of change of water temperature is slower in water system), it can postpone to reduce the working frequency of compressor, reach root Carry out anticipation water system amount of capacity according to the rate of change of water temperature in air-conditioner water system, and then according to water system amount of capacity come to sky The purpose for adjusting the conversion system of compressor to be adjusted, shuts down it is achieved thereby that reducing air-conditioning in the case where water system capacity is small Phenomenon, and reach the technique effect of target temperature value as early as possible in the case where water system capacity is big, and then solve existing Frequency conversion air-conditioning system caused due to the time that water system capacity difference causes frequent shutdown or extended to up to target temperature The technical problem of Consumer's Experience effect difference.
Due in air-conditioning heating or process of refrigerastion, mainly according to the difference of the leaving water temperature of setting and current leaving water temperature To adjust the frequency of compressor, also, leaving water temperature and current leaving water temperature difference in different scopes, it is necessary to the pressure of adjustment The frequency of contracting machine is also different, thus, in a kind of optional embodiment, the change of compressor in air-conditioning unit is adjusted according to span Frequency mode, can include:According to the relation of current leaving water temperature and default leaving water temperature in span, and water system, adjust The frequency of whole compressor.
Specifically, in the above-described embodiments, water system reclaimed water is being determined according to the rate of change of water temperature in air-conditioner water system After span belonging to the rate of change of temperature, further according to the pass of current leaving water temperature in water system and default leaving water temperature System, adjusts the frequency of compressor.
Herein it should be noted that very big (for example, 5 DEG C in the difference of the current leaving water temperature of air-conditioning and default leaving water temperature More than) in the case of, because the frequency of compressor needs fast lifting, then the frequency of compressor can be controlled by original logic control System (for example, the raising frequency speed of compressor is 3Hz/s);It is smaller in the difference of the current leaving water temperature of air-conditioning and default leaving water temperature In the case of (for example, 5 DEG C >=design temperature-current leaving water temperature >=2 DEG C), i.e., the close default leaving water temperature of current leaving water temperature In the case of, the frequency of compressor may undergo the process (stage two shown in Fig. 2 (a)) slowly lifted, then in control pressure While the frequency of contracting machine is by original logic control (for example, the raising frequency speed of compressor is 1Hz/s), also to pass through mainboard core Piece real-time statistics reach from current leaving water temperature and preset the leaving water temperature value of 2 DEG C of leaving water temperature lower deviation, and calculate this time Temperature rise rate V=(T2-T1)/△ t in section, wherein, T2 is default leaving water temperature, and T1 is current leaving water temperature, and △ t are water system Water temperature is warming up to the time of T2 experience from T1 in system.
Easily it is noted that in a heating mode, the difference of above-mentioned current leaving water temperature and default leaving water temperature is default Leaving water temperature subtracts current leaving water temperature;In cooling mode, the difference of above-mentioned current leaving water temperature and default leaving water temperature is Current leaving water temperature subtracts default leaving water temperature.
Based on above-described embodiment, as the first optional embodiment, as shown in figure 3, according to span, Yi Jishui The relation of current leaving water temperature and default leaving water temperature in system, adjusts the frequency of compressor, may include steps of:
Step S302, is the first span in span, and the currently difference of leaving water temperature and default leaving water temperature In the first temperature range, forbid improving the frequency of compressor;
Step S304, is the first span in span, and the currently difference of leaving water temperature and default leaving water temperature When belonging to second temperature scope, the fall off rate of compressor frequency is improved;
Step S306, is the first span in span, and the currently difference of leaving water temperature and default leaving water temperature When belonging to three temperature ranges, compressor shutdown is controlled.
Specifically, above-mentioned first span can be used for the rate of change for characterizing water temperature in water system than larger (i.e. water The capacity of system is smaller) a value range;Now need to reduce the frequency of compressor in advance, then with shown in Fig. 2 (a) Exemplified by air-conditioning, the lower limit of above-mentioned first temperature range could be arranged to 0 DEG C, and the higher limit of the first temperature range could be arranged to DEG C > of 2 DEG C, i.e., 2 now forbids the frequency of compressor to continue to rise as default leaving water temperature -0 DEG C of current leaving water temperature >;It is above-mentioned The lower limit of second temperature scope could be arranged to -2 DEG C, the higher limit of second temperature scope could be arranged to 0 DEG C, i.e., 0 DEG C >= When default leaving water temperature-current leaving water temperature >=-2 DEG C), now need to reduce the frequency of compressor, and to improve compressor The fall off rate (for example, fall off rate is 3Hz/s) of frequency;The higher limit of above-mentioned 3rd temperature range could be arranged to -2 DEG C, Leaving water temperature-current < -2 DEG C of leaving water temperature is preset, now needs to control compressor shutdown, it is alternatively possible to currently go out Coolant-temperature gage exceed default 2 DEG C of leaving water temperature when, control compressor shutdown, overheated or be subcooled protection.
In a kind of optional embodiment, the minimum value in above-mentioned first span is more than minimum change speed, the minimum Rate of change is used to indicate critical speed during compressor shutdown;Minimum value in first temperature range is more than second temperature scope In maximum;Minimum value in second temperature scope is more than the maximum in the 3rd temperature range.
Specifically, in the above-described embodiments, above-mentioned minimum change speed can be overtemperature protection compressor shutdown occur Minimum temperature rate of change, in a heating mode, the minimum change speed are the V2 in Fig. 2 (b).
It should be noted that the minimum value of above-mentioned first span can be determined by following experimental method:Work as machine Group refrigerating capacity, heating capacity carry out simulated experiment, actual water temperature to timing, water system capacity according to lower deviation in rated capacity 50% It is 15 DEG C of beginning simulated experiments with set water temperature initial deviation, whether to there is breaking through temperature spot shutdown for boundary, this in boundary Temperature rise rate is setting value, can write logic on this type.
As a kind of optional embodiment, in the case where actual water temperature and set water temperature initial deviation are 15 DEG C, it is assumed that The water system of specified water capacity, realizes that the time that the deviation of actual water temperature and set water temperature is used in 1 DEG C is 0.5h, and is less than The water system of specified water capacity 50%, in 0.2h, there is overtemperature protection shutdown in compressor, then by rate temperature change now As the minimum value (i.e. minimum change speed) in above-mentioned first span, i.e. V2 can be 14 ÷ 0.2=70 in Fig. 2 (b) ℃/h。
Based on above-described embodiment, as second of optional embodiment, as shown in figure 4, according to span, Yi Jishui The relation of current leaving water temperature and default leaving water temperature in system, adjusts the frequency of compressor, including:
Step S402, is the second span in span, and the currently difference of leaving water temperature and default leaving water temperature In four temperature ranges, current conversion system is maintained;
Step S404, is the second span in span, and difference is when belonging to five temperature ranges, forbids improving and presses The frequency of contracting machine;
Step S406, is the second span in span, and difference is when belonging to six temperature ranges, improves compressor The fall off rate of frequency;
Step S408, is the second span in span, and difference is when belonging to seven temperature ranges, controls compressor Shut down;
Wherein, maximum is the prearranged multiple less than maximum rate of change in the second span, wherein, maximum change Rate of change when speed is used to indicate to fail to reach target temperature within a predetermined period of time, the prearranged multiple is whole more than 2 Number.
Specifically, above-mentioned second span can be used for smaller (the i.e. water of rate of change for characterizing water temperature in water system The Capacity Ratio of system is larger) a value range;The frequency of delay reduction compressor is now needed, then still with the sky shown in Fig. 2 Example is adjusted to, the lower limit of above-mentioned 4th temperature range could be arranged to 0.5 DEG C, and the higher limit of the 4th temperature range could be arranged to DEG C > settings leaving water temperature -0.5 DEG C of the current leaving water temperature > of 2 DEG C, i.e., 2, now maintains the current conversion system of compressor, its In, maintain current conversion system to refer to that control air-conditioning is prestored according to compressor or intrinsic mode adjusts compressor Frequency;The lower limit of above-mentioned 5th temperature range could be arranged to 0 DEG C, and the higher limit of the 5th temperature range could be arranged to 0.5 DEG C, i.e., 0.5 DEG C > settings leaving water temperature -0 DEG C of current leaving water temperature > now forbids the frequency of compressor to continue to rise;It is above-mentioned The lower limit of 6th temperature range could be arranged to 0 DEG C, the higher limit of the 6th temperature range could be arranged to 0.5 DEG C, i.e., 0 DEG C >= Set leaving water temperature-current leaving water temperature >=-2 DEG C, compressor frequency rapid decrease, for example, fall off rate 3hz/s;Above-mentioned The higher limit of seven temperature ranges could be arranged to -2 DEG C, that is, set leaving water temperature-current < -2 DEG C of leaving water temperature, now need Compressor shutdown is controlled, it is alternatively possible to which when current leaving water temperature exceedes default 2 DEG C of leaving water temperature, control compressor stops Machine, is overheated or is subcooled protection.
In a kind of optional embodiment, the maximum of above-mentioned second span can be not arrive temperature spot for a long time most Big temperature rise rate, setting leaving water temperature and current leaving water temperature start to count in 1 DEG C of deviation of lower limit, still miss the mark after 1h Temperature is it is believed that can not reach temperature spot for a long time;The minimum value of 4th temperature range is more than the maximum of the 5th temperature range; Maximum in 6th temperature range is less than the minimum value in the 5th temperature range;Maximum in 7th temperature range is less than the Minimum value in six temperature ranges.
Specifically, in the above-described embodiments, above-mentioned maximum rate of change can be to be not up to always in preset time period The maximum temperature rate of change of target temperature, alternatively, during air-conditioning heating, the maximum rate of change can be Fig. 2 (b) In V1.
It should be noted that the maximum of above-mentioned second span can be determined by following experimental method:Work as machine Group refrigerating capacity, heating capacity carry out simulated experiment, actual water temperature to timing, water system capacity according to lower deviation in rated capacity 50% It is 15 DEG C of beginning simulated experiments with set water temperature initial deviation, whether to there is long-time actual water temperature and set water temperature deviation exists Setting value is not reached in 1 DEG C and always for boundary, this temperature rise rate is setting value in boundary, can write logic in this type On.
As a kind of optional embodiment, in the case where actual water temperature and set water temperature initial deviation are 15 DEG C, it is assumed that The water system of specified water capacity, realizes that the time that the deviation of actual water temperature and set water temperature is used in 1 DEG C is 0.5h, and is higher than The water system of specified water capacity 50%, is all not carried out the deviation of actual water temperature and set water temperature in 1 DEG C in 1h, will now Rate temperature change as the maximum (i.e. maximum rate of change) of above-mentioned second span, i.e. V1 can be with Fig. 2 (b) For 14 ÷ 0.5=28 DEG C/h.
Based on above-described embodiment, as the third optional embodiment, as shown in figure 5, according to span, Yi Jishui The relation of current leaving water temperature and default leaving water temperature in system, adjusts the frequency of compressor, including:
Step S502, is the 3rd span in span, and difference is when belonging to eight temperature ranges, maintains compressor Conversion system;
Step S504, is the 3rd span in span, and difference is when belonging to nine temperature ranges, forbids improving and presses Contracting unit frequency;
Step S506, is the 3rd span in span, and difference is when belonging to ten temperature ranges, improves compressor The fall off rate of frequency;
Step S508, is the 3rd span in span, and difference is when belonging to 11 temperature range, control compression Machine is shut down;
Wherein, the minimum value that the maximum in the 3rd span is less than in minimum change speed, the 3rd span is big In the maximum rate of change of prearranged multiple.
Specifically, above-mentioned 3rd span can be used for characterize water system in water temperature rate of change it is more moderate one Individual value range;Still by taking the air-conditioning shown in Fig. 2 as an example, the lower limit of above-mentioned 8th temperature range could be arranged to 1 DEG C, the 8th temperature The higher limit of scope could be arranged to DEG C > of 2 DEG C, i.e., 2 when setting leaving water temperature-current leaving water temperature >=1 DEG C, now maintain pressure The current conversion system of contracting machine, for example, raising frequency speed 1hz/s;The lower limit of above-mentioned 9th temperature range could be arranged to 0 DEG C, The higher limit of 9th temperature range could be arranged to DEG C > of 1 DEG C, i.e., 1 and work as setting leaving water temperature -0 DEG C of current leaving water temperature >, this When forbid compressor frequency continue rise;The lower limit of above-mentioned tenth temperature range could be arranged to -2 DEG C, the tenth temperature model The higher limit enclosed could be arranged to 0 DEG C, i.e., 0 DEG C >=when setting leaving water temperature-current leaving water temperature >=-2 DEG C, and compressor frequency is fast Speed declines, for example, fall off rate 3hz/s;The higher limit of above-mentioned 11st temperature range could be arranged to -2 DEG C, that is, set out Coolant-temperature gage-current < -2 DEG C of leaving water temperature, now needs to control compressor shutdown, it is alternatively possible to super in current leaving water temperature Cross default 2 DEG C of leaving water temperature when, control compressor shutdown, overheated or be subcooled protection.
It should be noted that the basic control logic of refrigeration mode and above-mentioned logic are similar, only overheat is changed to supercooling, calculating formula Current leaving water temperature-setting leaving water temperature is changed to, other parameters are constant, and in this not go into detail.
In a kind of optional embodiment, compressed as shown in fig. 6, being adjusted according to the span in the air-conditioner set The conversion system of machine, may include steps of:
Step S602, the range of capacity of water system corresponding with span is determined according to span;
Step S604, compares the size of the extreme value and first threshold in range of capacity, wherein, extreme value is included in range of capacity Maximum or range of capacity in minimum value;
Step S606, conversion system is adjusted according to comparative result.
As a kind of preferred embodiment, Fig. 7 is a kind of optional residential central air- peace according to embodiments of the present invention Schematic diagram is filled, as shown in fig. 7, icon 1 is air-conditioner host, icon 2 is fan coil, and icon 3 is rubber soft-jointing, and icon 4 is temperature Degree meter, icon 5 is pressure gauge, and icon 6 is stop valve, and icon 7 is bypass regulator valve, and icon 8 is T type filters, and icon 9 is Ground, icon 10 is check-valves, and icon 11 is flowmeter, and icon 12 is discharging valve, and icon 13 is electric two-way valve, and icon 14 is Electric T-shaped valve, icon 15 is ball valve, and icon 16 is automatic exhaust steam valve.
Technical scheme disclosed in the above embodiments of the present application, it is possible to achieve following technique effect:Pass through water system temperature drop, temperature Raising speed rate intelligence anticipation water system amount of capacity;By that can be solved to compressor variable frequency Energy Saving Control near air-conditioning design temperature point Certainly refrigeration, heat and water system capacity are crossed, owe to coordinate, it is to avoid shut down to temperature spot, give full play to frequency-changeable compressor negative in part Energy-saving effect under lotus, improves comfortableness, temperature control accuracy;By searching different ability units collocation different size water capacity temperature Drop, the experimental test procedures of temperature rise rate, it is found result and compiled in control logic, reaches the purpose of intelligent anticipation water capacity.
Embodiment 2
According to embodiments of the present invention, a kind of control device embodiment of compressor frequency is additionally provided.
Fig. 8 is a kind of control device structural representation of compressor frequency according to embodiments of the present invention, as shown in figure 8, The device includes:Acquisition module 801, determining module 803 and adjusting module 805.Wherein, acquisition module 801, for obtaining sky Adjust the rate of change of water temperature in unit grey water system;And determining module 803, for determining rate of change institute according to rate of change The span of category;Adjusting module 805, the conversion system for adjusting compressor in air-conditioning unit according to span.
It should be noted that above-mentioned acquisition module 801, determining module 803 and adjusting module 805 correspond to embodiment 1 In step S102 to step S106, three modules are identical with the example realized of step and application scenarios of correspondence, but do not limit In the disclosure of that of above-described embodiment 1.
In a kind of optional embodiment, above-mentioned adjusting module is additionally operable to according to current in span, and water system The relation of leaving water temperature and default leaving water temperature, adjusts the frequency of compressor.
In a kind of optional embodiment, above-mentioned adjusting module includes:First execution unit, the second execution unit and Three execution units.Wherein, the first execution unit, for being the first span in span, and current leaving water temperature with it is pre- The difference of coolant-temperature gage is set out in the first temperature range, forbids improving the frequency of compressor;Second execution unit, in value Scope is the first span, and difference is when belonging to second temperature scope, improves the fall off rate of compressor frequency;3rd performs Unit, for being the first span in span, and difference is when belonging to three temperature ranges, controls compressor shutdown.
Implement it should be noted that above-mentioned first execution unit, the second execution unit and the 3rd execution unit correspond to Step S302 to step S306 in example 1, three modules are identical with example and application scenarios that the step of correspondence is realized, but not It is limited to the disclosure of that of above-described embodiment 1.
In a kind of optional embodiment, the minimum value in the first span is more than minimum change speed, and the minimum becomes The rate of change for changing speed when being used to indicate compressor shutdown;Minimum value in first temperature range is more than in second temperature scope Maximum;Minimum value in second temperature scope is more than the maximum in the 3rd temperature range.
In a kind of optional embodiment, above-mentioned adjusting module includes:4th execution unit, the 5th execution unit, the 6th Execution unit and the 7th execution unit.Wherein, the 4th execution unit, for being the second span in span, and works as The difference of preceding leaving water temperature and default leaving water temperature maintains current conversion system in four temperature ranges;5th performs list Member, for being the second span in span, and difference is when belonging to five temperature ranges, forbids improving the frequency of compressor Rate;6th execution unit, for being the second span in span, and difference is when belonging to six temperature ranges, improves pressure The fall off rate of contracting unit frequency;7th execution unit, for being the second span in span, and difference belongs to the 7th temperature When spending scope, compressor shutdown is controlled;Wherein, maximum is less than predetermined times of maximum rate of change in the second span Number, wherein, rate of change when the maximum rate of change is used to indicate to fail to reach target temperature within a predetermined period of time, this is pre- It is the integer more than 2 to determine multiple.
It should be noted that above-mentioned 4th execution unit, the 5th execution unit, the 6th execution unit and the 7th perform list The step S402 to step S408 that member corresponds in embodiment 1, example and application that four modules are realized with corresponding step Scene is identical, but is not limited to the disclosure of that of above-described embodiment 1.
In a kind of optional embodiment, the minimum value of the 4th temperature range is more than the maximum of the 5th temperature range;The Maximum in six temperature ranges is not more than the minimum value in the 5th temperature range;Maximum in 7th temperature range is not more than Minimum value in 6th temperature range.
In a kind of optional embodiment, above-mentioned adjusting module includes:8th execution unit, the 9th execution unit, the tenth Execution unit and the 11st execution unit.Wherein, the 8th execution unit, for being the 3rd span in span, and When difference belongs to eight temperature ranges, the conversion system of compressor is maintained;9th execution unit, for being the 3rd in span Span, and difference is when belonging to nine temperature ranges, forbids improving compressor frequency;Tenth execution unit, in value Scope is the 3rd span, and difference is when belonging to ten temperature ranges, improves the fall off rate of compressor frequency;11st holds Row unit, for being the 3rd span in span, and difference is when belonging to 11 temperature range, and control compressor stops Machine;Wherein, the minimum value that the maximum in the 3rd span is less than in minimum change speed, the 3rd span is more than predetermined The maximum rate of change of multiple.
It should be noted that above-mentioned 8th execution unit, the 9th execution unit, the tenth execution unit and the 11st are performed The step S502 to step S508 that unit corresponds in embodiment 1, example and answer that four modules are realized with corresponding step It is identical with scene, but it is not limited to the disclosure of that of above-described embodiment 1.
In a kind of optional embodiment, above-mentioned adjusting module includes:Determining unit, comparing unit and adjustment unit. Wherein it is determined that unit, the range of capacity for determining water system corresponding with span according to span;Comparing unit, Size for comparing extreme value and first threshold in range of capacity, wherein, extreme value includes the maximum or appearance in range of capacity Measure the minimum value in scope;Adjustment unit, for adjusting conversion system according to comparative result.
It should be noted that above-mentioned:The step that determining unit, comparing unit and adjustment unit correspond in embodiment 1 S602 to step S606, three modules are identical with example and application scenarios that the step of correspondence is realized, but are not limited to above-mentioned reality Apply the disclosure of that of example 1.
Another aspect according to embodiments of the present invention, additionally provides a kind of storage medium, wherein, storage medium includes storage Program, wherein, program perform embodiment 1 in compressor frequency control method.
Another aspect according to embodiments of the present invention, additionally provides a kind of processor, wherein, processor is used to run journey Sequence, wherein, the control method of the compressor frequency in embodiment 1 is performed when program is run.
The embodiments of the present invention are for illustration only, and the quality of embodiment is not represented.
In the above embodiment of the present invention, the description to each embodiment all emphasizes particularly on different fields, and does not have in some embodiment The part of detailed description, may refer to the associated description of other embodiment.
In several embodiments provided herein, it should be understood that disclosed technology contents, others can be passed through Mode is realized.Wherein, device embodiment described above is only schematical, such as division of described unit, Ke Yiwei A kind of division of logic function, can there is other dividing mode when actually realizing, such as multiple units or component can combine or Person is desirably integrated into another system, or some features can be ignored, or does not perform.Another, shown or discussed is mutual Between coupling or direct-coupling or communication connection can be the INDIRECT COUPLING or communication link of unit or module by some interfaces Connect, can be electrical or other forms.
The unit illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple On unit.Some or all of unit therein can be selected to realize the purpose of this embodiment scheme according to the actual needs.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, can also That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list Member can both be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If the integrated unit is realized using in the form of SFU software functional unit and as independent production marketing or used When, it can be stored in a computer read/write memory medium.Understood based on such, technical scheme is substantially The part contributed in other words to prior art or all or part of the technical scheme can be in the form of software products Embody, the computer software product is stored in a storage medium, including some instructions are to cause a computer Equipment (can for personal computer, server or network equipment etc.) perform each embodiment methods described of the invention whole or Part steps.And foregoing storage medium includes:USB flash disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can be with store program codes Medium.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims (11)

1. a kind of control method of compressor frequency, it is characterised in that including:
Obtain the rate of change of water temperature in air-conditioner set grey water system;And
The span belonging to the rate of change is determined according to the rate of change;
The conversion system of the compressor in air-conditioning unit is adjusted according to the span.
2. control method according to claim 1, it is characterised in that adjust the air-conditioner set according to the span The conversion system of middle compressor, including:
According to the relation of current leaving water temperature in the span, and the water system and default leaving water temperature, institute is adjusted State the frequency of compressor.
3. control method according to claim 2, it is characterised in that according to the span, and the water system In current leaving water temperature and default leaving water temperature relation, adjust the frequency of the compressor, including:
It is the first span in the span, and the difference of the current leaving water temperature and the default leaving water temperature exists During the first temperature range, forbid improving the frequency of the compressor;
It is first span in the span, and the difference is when belonging to second temperature scope, improves compressor The fall off rate of frequency;
It is first span in the span, and the difference is when belonging to three temperature ranges, controls the pressure Contracting machine is shut down.
4. control method according to claim 3, it is characterised in that the minimum value in first span is more than most Small rate of change, the minimum change speed is used to indicate critical speed during compressor shutdown;In first temperature range Minimum value is more than the maximum in the second temperature scope;Minimum value in the second temperature scope is more than the described 3rd temperature The maximum spent in scope.
5. control method according to claim 4, it is characterised in that according to the span, and the water system In current leaving water temperature and default leaving water temperature relation, adjust the frequency of the compressor, including:
It is the second span in the span, and the difference of the current leaving water temperature and the default leaving water temperature exists During four temperature ranges, current conversion system is maintained;
It is second span in the span, and the difference is when belonging to five temperature ranges, forbids improving and presses The frequency of contracting machine;
It is second span in the span, and the difference is when belonging to six temperature ranges, improves compressor The fall off rate of frequency;
It is second span in the span, and the difference is when belonging to seven temperature ranges, controls the pressure Contracting machine is shut down;
Wherein, maximum is less than the prearranged multiple of maximum rate of change in second span, wherein, maximum change speed Critical speed when rate is used to indicate to fail to reach target temperature within a predetermined period of time.
6. control method according to claim 5, it is characterised in that the minimum value of the 4th temperature range is more than described The maximum of 5th temperature range;Maximum in 6th temperature range is less than the minimum in the 5th temperature range Value;Maximum in 7th temperature range is less than the minimum value in the 6th temperature range.
7. control method according to claim 5, it is characterised in that according to the span, and the water system In current leaving water temperature and default leaving water temperature relation, adjust the frequency of the compressor, including:
It is the 3rd span in the span, and the difference is when belonging to eight temperature ranges, maintains the compressor Conversion system;
It is the 3rd span in the span, and the difference is when belonging to nine temperature ranges, forbids improving and presses Contracting unit frequency;
It is the 3rd span in the span, and the difference is when belonging to ten temperature ranges, improves compressor The fall off rate of frequency;
It is the 3rd span in the span, and the difference is when belonging to 11 temperature range, control is described Compressor shutdown;
Wherein, the maximum in the 3rd span is less than in the minimum change speed, the 3rd span Minimum value is more than the maximum rate of change of the prearranged multiple.
8. control method according to claim 1, it is characterised in that adjust the air-conditioner set according to the span The conversion system of middle compressor, including:
The range of capacity of the water system corresponding with the span is determined according to the span;
Compare the size of the extreme value and first threshold in the range of capacity, wherein, the extreme value is included in the range of capacity Maximum or the range of capacity in minimum value;
The conversion system is adjusted according to comparative result.
9. a kind of control device of compressor frequency, it is characterised in that including:
Acquisition module, the rate of change for obtaining water temperature in air-conditioner set grey water system;And
Determining module, for determining the span belonging to the rate of change according to the rate of change;
Adjusting module, the conversion system for adjusting the compressor in air-conditioning unit according to the span.
10. a kind of storage medium, it is characterised in that the storage medium includes the program of storage, wherein, described program right of execution Profit requires the control method of the compressor frequency described in any one in 1 to 8.
11. a kind of processor, it is characterised in that the processor is used for operation program, wherein, right of execution when described program is run Profit requires the control method of the compressor frequency described in any one in 1 to 8.
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