CN105674472A - Refrigeration control method and device for machine room - Google Patents
Refrigeration control method and device for machine room Download PDFInfo
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- CN105674472A CN105674472A CN201410663543.1A CN201410663543A CN105674472A CN 105674472 A CN105674472 A CN 105674472A CN 201410663543 A CN201410663543 A CN 201410663543A CN 105674472 A CN105674472 A CN 105674472A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention relates to the technical field of refrigeration and discloses a refrigeration control method and device for a machine room. The refrigeration control method for the machine room comprises the steps that current return air temperatures and current supply air temperatures of all indoor units of air conditioners are received; and the rotating speed of fans and the rotating speed of compressors (or the opening degree of a water valve) are adjusted according to the corresponding relation of a stored target return air temperature, the rotating speed of the fans of all the indoor units with a calibrated target supply air temperature and the rotating speed of the compressors of compressor air conditioners (or the opening degree of the water valve of a chilled water air conditioner) when the current return air temperature is not equal to the target return air temperature, so that the current return air temperature is adjusted to the target return temperature, and the current supply air temperature is adjusted to the target supply air temperature. According to the technical scheme, the adjustment range of the refrigerating capacity of the air conditioners can be enlarged, and the stability of refrigeration control is improved.
Description
Technical field
The present invention relates to refrigeration technology field, particularly relate to refrigeration control method and the device of a kind of machine room.
Background technology
Data center, is commonly called as machine room, is the facility of a whole set of complexity. It not only includes computer system and other matched equipment (such as communicate and store system), also comprises the data communication connection of redundancy, environmental control equipment, monitoring device and various safety device. Existing data center, the ratio that energy cost accounts for machine room operation cost is higher, and only lower than the electric power of half for IT load, remaining electric power is then for infrastructure such as power supply and cooling systems.
Current machine room great majority adopt the air-conditioning being arranged between server as refrigeration plant, air-conditioning belongs to nearly heat source air conditioner, air supplying distance (i.e. distance between air conditioner air outlet and frame information technoloy equipment) is shortened relative to traditional air conditioner in machine room, the cooling effectiveness of refrigeration plant significantly improves, and has the advantages such as control is accurate, rate of cooling is fast. Along with the raising that machine room energy-saving is required, server and air-conditioning are arranged also to become increasingly be widely applied selection according to being closed cold channel form. As shown in Figure 1, the division of room structure of the cold channel form of existing closing, two refrigeration units it are divided in machine room 1, each refrigeration unit include multiple servers 11 and between multiple servers 11 arrange several air-conditionings 12, two refrigeration units are oppositely arranged and are formed the cold passage 13 of closing, the cold airflow that air-conditioning 12 refrigeration is formed enters closes cold passage 13, then flows into server 11, to reduce the temperature of server 11.
In the machine room of the cold channel form of above-mentioned closing, the operating ambient temperature of server is then the wind pushing temperature of air-conditioning, therefore, in the machine room of this form, regulates the operating ambient temperature of machine room by controlling the wind pushing temperature of air-conditioning, and its refrigeration control strategy is as follows:
Air outlet at air-conditioning arranges temperature sensor in order to detect wind pushing temperature, and the refrigeration demand amount of complete machine is drawn by the mathematic interpolation of actual wind pushing temperature and target wind pushing temperature. If actual wind pushing temperature is higher than target wind pushing temperature, then illustrate that refrigeration demand amount increases, now control frequency-changeable compressor and improve rotating speed, and/or, control air-conditioning draught fan and reduce rotating speed, so that wind pushing temperature is reduced to target wind pushing temperature. If actual wind pushing temperature is lower than target wind pushing temperature, then illustrate that refrigeration demand amount reduces, now control frequency-changeable compressor and reduce rotating speed, and/or control air-conditioning draught fan improves rotating speed. This refrigeration control method regulates ratio faster, but the reduction of the restriction that the cost brought of this quick adjustment is unit refrigerating capacity to be exported and efficiency. Such as, when machine room thermic load increases, the wind pushing temperature detected through temperature sensor can raise, if only reducing the rotation speed of fan of air-conditioning, although wind pushing temperature being made in a short time to reduce, but therefore the refrigerating capacity of complete machine is likely to and can decline, from the angle of heat load balance, finally still wind pushing temperature being made again to increase, wind pushing temperature is stability contorting not easily. And if reducing, rotating speed of air conditioner fan process improves compressor rotary speed according to refrigeration demand, although wind pushing temperature can be made equally to reduce, but whether the refrigerating capacity of complete machine output can become with the increase of thermic load also becomes not sure greatly, this is owing to the refrigerating capacity of complete machine output has direct relation with the amplitude of variation of rotation speed of fan and compressor rotary speed. And, if regulated in the manner described above, even if complete machine output refrigerating capacity adds, but increase the refrigerating capacity of complete machine by reducing rotating speed of air conditioner fan and raising compressor rotary speed, first the range of accommodation of air-conditioning maximum cooling capacity can be limited, it is also possible to make the efficiency of complete machine worsen.
Additionally, temperature sensor owing to feeding back actual wind pushing temperature is directly arranged at air conditioning exhausting side, the actual wind pushing temperature value of its feedback is sensitiveer by the impact of rotation speed of fan and compressor rotary speed, therefore, rotation speed of fan or compressor rotary speed slightly adjust the temperature being easy for the temperature sensor so that air conditioning exhausting side and change, make wind pushing temperature be likely to be constantly in the state of adjustment, cause the less stable of air conditioning system.
Prior art has the disadvantage that, adopt wind pushing temperature as the parameter of refrigeration control method, owing to the amplitude of variation of compressor rotary speed and rotation speed of fan not can determine that, therefore, define the range of accommodation of air conditioner refrigerating amount, further, since wind pushing temperature is vulnerable to the impact of compressor rotary speed and rotation speed of fan, also it is easily caused the less stable of refrigeration control system.
Summary of the invention
The invention provides the refrigeration control method of a kind of machine room and device, in order to expand the range of accommodation of air conditioner refrigerating amount, and improve the stability of refrigeration control.
First the embodiment of the present invention provides the refrigeration control method of a kind of machine room, including:
Receive the current return air temperature of each indoor set of air-conditioning and current wind pushing temperature;
When described current return air temperature is not equal to target return air temperature, the rotation speed of fan of each indoor set of the compressor air-conditioning that the target return air temperature according to storage is demarcated with target wind pushing temperature and the corresponding relation of compressor rotary speed, regulate rotation speed of fan and compressor rotary speed, current return air temperature is regulated to target return air temperature so that current wind pushing temperature regulates to target wind pushing temperature; Or, the rotation speed of fan of each indoor set of the chilled water air-conditioning that the target return air temperature according to storage is demarcated with target wind pushing temperature and the corresponding relation of water valve aperture, regulate rotation speed of fan and water valve aperture, current return air temperature is regulated to target return air temperature so that current wind pushing temperature regulates to target wind pushing temperature.
In technical solution of the present invention, compressor air-conditioning is conventional compressor air-conditioning, is in turn connected to form the compressor of closed cycle, condenser, restricting element and vaporizer including by the first pipeline, is wherein cold-producing medium in the first pipeline, and chilled water air-conditioning is also conventional chilled water air-conditioning, including the water valve being in turn connected to form closed cycle by the second pipeline, condenser, restricting element and vaporizer, it is wherein water in the second pipeline, the principle of the refrigeration control method of the present invention can be respectively suitable in both air-conditionings, illustrate for compressor air-conditioning, the rotation speed of fan of each indoor set of the compressor air-conditioning that the target return air temperature according to storage is demarcated with target wind pushing temperature and the corresponding relation of compressor rotary speed regulate compressor rotary speed and rotation speed of fan, be conducive to improving the range of accommodation of air conditioner refrigerating amount, additionally, by regulating return air temperature, the refrigeration demand amount of machine room is regulated and controled, owing to the change of return air temperature is relatively slow, therefore, the control stability of air conditioning system can be improved.
In the present invention, for compressor air-conditioning, rotation speed of fan and compressor rotary speed can be regulated according to the rotation speed of fan of each indoor set of the compressor air-conditioning that the target return air temperature of storage is demarcated with target wind pushing temperature and the corresponding relation of compressor rotary speed, this corresponding relation can be functional relationship, naturally it is also possible to for the form of the list of rotation speed of fan numerical value corresponding to compressor rotary speed. This functional relationship is preferably the functional relationship that rotation speed of fan increases along with compressor rotary speed. In like manner, also it is such for chilled water air-conditioning.
Preferably, the rotation speed of fan of each indoor set of described compressor air-conditioning and the corresponding relation of compressor rotary speed are the rotation speed of fan first linear positive function relation with compressor rotary speed of each indoor set of compressor air-conditioning; The rotation speed of fan of each indoor set of described chilled water air-conditioning and the corresponding relation of water valve aperture are the rotation speed of fan second linear positive function relation with water valve aperture of each indoor set of chilled water air-conditioning.
In this embodiment, for compressor air-conditioning, have employed the rotation speed of fan of each indoor set of the compressor air-conditioning that target return air temperature is demarcated the first linear positive function relational expression with the compressor rotary speed of compressor air-conditioning with target wind pushing temperature to regulate rotation speed of fan and compressor rotary speed, owing to being linear positive function relation when rotation speed of fan regulates with compressor rotary speed, while increasing or reduce complete machine refrigerating capacity, therefore expand the range of accommodation of air conditioner refrigerating amount.
Preferably, the rotation speed of fan of each indoor set of described compressor air-conditioning is N=Kn with the first linear positive function relation of compressor rotary speed1Second linear positive function relation of+δ, the rotation speed of fan of each indoor set of described chilled water air-conditioning and water valve aperture is N=Kn2+ δ, wherein, N represents rotation speed of fan percentage ratio, n1Represent compressor rotary speed percentage ratio, n2Representing water valve percent travel, K is positive number and is fixed value, and δ is side-play amount, the target return air temperature of each indoor set and target wind pushing temperature demarcate.
The refrigeration control method of the present invention also includes:
When described current return air temperature is more than the setting value of return air temperature, the compressor rotary speed and the rotation speed of fan that control compressor air-conditioning increase according to described first linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature; Or, the water valve aperture and the rotation speed of fan that control chilled water air-conditioning increase according to described second linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature.
The refrigeration control method of the present invention, also includes:
When described current return air temperature is less than the setting value of return air temperature, the compressor rotary speed and the rotation speed of fan that control compressor air-conditioning reduce according to described first linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature; Or, the water valve aperture and the rotation speed of fan that control chilled water air-conditioning reduce according to described second linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature.
Preferably, the rotation speed of fan of each indoor set that the target return air temperature of described storage is demarcated with target wind pushing temperature obtains according to interpolation method with the first linear positive function relation of the compressor rotary speed of compressor air-conditioning; The rotation speed of fan of each indoor set of the chilled water air-conditioning that the target return air temperature of described storage is demarcated with target wind pushing temperature and the second linear positive function relation of water valve aperture obtain according to interpolation method.
Based on identical inventive concept, the embodiment of the present invention also provides for the refrigeration control device of a kind of machine room, including:
Receive device, for receiving the current return air temperature of each indoor set of air-conditioning and current wind pushing temperature;
Adjustment module, for when described current return air temperature is not equal to target return air temperature, the rotation speed of fan of each indoor set of the compressor air-conditioning that the target return air temperature according to storage is demarcated with target wind pushing temperature and the corresponding relation of compressor rotary speed, regulate rotation speed of fan and compressor rotary speed, current return air temperature is regulated to target return air temperature so that current wind pushing temperature regulates to target wind pushing temperature; Or, the rotation speed of fan of each indoor set of the chilled water air-conditioning that the target return air temperature according to storage is demarcated with target wind pushing temperature and the corresponding relation of water valve aperture, regulate rotation speed of fan and water valve aperture, current return air temperature is regulated to target return air temperature so that current wind pushing temperature regulates to target wind pushing temperature.
Preferably, described adjustment module, specifically for when described current return air temperature is not equal to target return air temperature, the rotation speed of fan of each indoor set of the compressor air-conditioning that the target return air temperature according to storage is demarcated with target wind pushing temperature and the first linear positive function relation of compressor rotary speed, regulate rotation speed of fan and compressor rotary speed, current return air temperature is regulated to target return air temperature so that current wind pushing temperature regulates to target wind pushing temperature; Or, the rotation speed of fan of each indoor set of the chilled water air-conditioning that the target return air temperature according to storage is demarcated with target wind pushing temperature and the second linear positive function relation of water valve aperture, regulate rotation speed of fan and water valve aperture, current return air temperature is regulated to target return air temperature so that current wind pushing temperature regulates to target wind pushing temperature.
Preferably, described adjustment module is additionally operable to when described current return air temperature is more than the setting value of return air temperature, the compressor rotary speed and the rotation speed of fan that control compressor air-conditioning increase according to described first linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature; Or, the water valve aperture and the rotation speed of fan that control chilled water air-conditioning increase according to described second linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature.
Preferably, described adjustment module is additionally operable to when described current return air temperature is less than the setting value of return air temperature, the compressor rotary speed and the rotation speed of fan that control compressor air-conditioning reduce according to described first linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature; Or, the water valve aperture and the rotation speed of fan that control chilled water air-conditioning reduce according to described second linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature.
Accompanying drawing explanation
Fig. 1 is the division of room structural representation of the cold channel form of existing closing;
Fig. 2 is the refrigeration control method one embodiment schematic flow sheet of machine room of the present invention;
Fig. 3 is the rotation speed of fan of compressor air-conditioning of the present invention and the second linear positive function graph of relation of the first linear positive function graph of relation of compressor rotary speed or rotation speed of fan and water valve aperture for chilled water air-conditioning of the present invention;
Fig. 4 is the schematic flow sheet of another embodiment of the refrigeration control method of machine room of the present invention;
Fig. 5 is the refrigeration control device one example structure schematic diagram of the machine room of the present invention.
Accompanying drawing labelling:
1-machine room 11-server 12-air-conditioning 13-closes cold passage
21-receiver module 22-adjustment module
Detailed description of the invention
In order to expand the range of accommodation of air conditioner refrigerating amount, and the stability of raising refrigeration control, the embodiment of the present invention provides refrigeration control method and the device of a kind of machine room. In this technical scheme, have employed the rotation speed of fan of each indoor set that target return air temperature the is demarcated corresponding relation with the compressor rotary speed (or water valve aperture of chilled water air-conditioning) of compressor air-conditioning with target wind pushing temperature to regulate rotation speed of fan and compressor rotary speed (or water valve aperture), be conducive to expanding the range of accommodation of air conditioner refrigerating amount, additionally, by regulating return air temperature, the refrigeration demand amount of machine room is regulated and controled, owing to the change of return air temperature is relatively slow, it is thus possible to improve the control stability of air conditioning system. For making the object, technical solutions and advantages of the present invention clearly, the present invention is further detailed explanation below to lift specific embodiment.
Adopt wind pushing temperature control model, when machine room thermic load increases, if individually improve rotating speed of air conditioner fan or improve the rotating speed of compressor of air conditioner and blower fan simultaneously, although its complete machine refrigeration output trend is consistent with the change direction of machine room thermic load, but regulated step-length by air-conditioning draught fan and compressor rotary speed to be limited, the stability of airconditioning control also can be made to die down. Such as: when causing that wind pushing temperature is higher than desired value because of machine room thermic load increase, if wind pushing temperature is affected by rotating speed of air conditioner fan by wind pushing temperature impact faster than compressor rotary speed, improving rotating speed of air conditioner fan may make the wind pushing temperature that air conditioning system regulates the initial stage increase further, so that refrigeration demand value of calculation forms a positive feedback process with rotation speed of fan, and deviate from truth, possibly even can make repeatedly shaking occurs in system fading margin process, and system stability is died down. Although the change step of rotating speed of air conditioner fan and compressor rotary speed can be passed through to control, make both that the speed that affects of wind pushing temperature is equally solved the problems referred to above, but this synchronized relation affecting speed is more fragile, can become less stable because of the difference of environmental effect and system.
In embodiments of the present invention, compressor air-conditioning is conventional compressor air-conditioning, is in turn connected to form the compressor of closed cycle, condenser, restricting element and vaporizer including by the first pipeline, is wherein cold-producing medium in the first pipeline; And chilled water air-conditioning is also conventional chilled water air-conditioning, including being in turn connected to form the water valve of closed cycle, condenser, restricting element and vaporizer by the second pipeline, it is wherein water in the second pipeline. Two schemes of the refrigeration control method of the present invention are respectively directed to the machine room adopting different refrigeration control systems, refrigeration control system respectively compressor air-conditioning and chilled water air-conditioning, in compressor air-conditioning, storage has the corresponding relation of the target return air temperature rotation speed of fan with each indoor set of the compressor air-conditioning of target wind pushing temperature demarcation and compressor rotary speed, when return air temperature is not equal to target return air temperature, regulate rotation speed of fan and compressor rotary speed; In chilled water air-conditioning, storage has the corresponding relation of the target return air temperature rotation speed of fan with each indoor set of the chilled water air-conditioning of target wind pushing temperature demarcation and compressor rotary speed, when return air temperature is not equal to target return air temperature, regulate rotation speed of fan and water valve aperture. For compressor air-conditioning, it is preferred that above-mentioned corresponding relation can be functional relationship, naturally it is also possible to for the form of the list of rotation speed of fan numerical value corresponding to compressor rotary speed. This functional relationship is preferably the functional relationship that rotation speed of fan increases along with compressor rotary speed. Chilled water air-conditioning is also such. Preferably, the two functional relationship respectively the first linear positive function relation and the second linear positive function relation. Following for machine room adopt compressor air-conditioning illustrate.
First the embodiment of the present invention provides the refrigeration control method of a kind of machine room, as in figure 2 it is shown, the refrigeration control method one embodiment schematic flow sheet that Fig. 2 is machine room of the present invention, described refrigeration control method includes:
Step 101, the current return air temperature receiving each indoor set of air-conditioning and current wind pushing temperature;
Step 102, judge whether current return air temperature is not equal to target return air temperature; If it is, perform step 103; Otherwise, step 101 is returned;
The rotation speed of fan of each indoor set of the compressor air-conditioning that step 103, target return air temperature and target wind pushing temperature according to storage are demarcated and the corresponding relation of compressor rotary speed, regulate rotation speed of fan and compressor rotary speed, current return air temperature is regulated to target return air temperature so that current wind pushing temperature regulates to target wind pushing temperature.
In technical solution of the present invention, corresponding relation according to compressor rotary speed and rotation speed of fan regulates compressor rotary speed and rotation speed of fan, be conducive to improving the range of accommodation of air conditioner refrigerating amount, additionally, by regulating return air temperature, the refrigeration demand amount of machine room is regulated and controled, owing to the change of return air temperature is relatively slow, it is thus possible to improve the control stability of air conditioning system.
In the present invention, for compressor air-conditioning, it is possible to regulate rotation speed of fan and compressor rotary speed according to the rotation speed of fan of each indoor set of the target return air temperature of storage with the compressor air-conditioning of target wind pushing temperature demarcation with the functional relationship of compressor rotary speed. This functional relationship is preferably the functional relationship that rotation speed of fan increases along with compressor rotary speed. In like manner, also it is such for chilled water air-conditioning.
When machine room not adopting compressor air-conditioning adopt chilled water air-conditioning, step 101 and step 102 are constant, only need to change step 103 into the control strategy of chilled water air-conditioning, the rotation speed of fan of each indoor set of the chilled water air-conditioning namely demarcated with target wind pushing temperature according to the target return air temperature of storage and the corresponding relation of water valve aperture, regulate rotation speed of fan and water valve aperture, current return air temperature is regulated to target return air temperature so that current wind pushing temperature regulates to target wind pushing temperature.
Preferably, in step 103, the rotation speed of fan of each indoor set of compressor air-conditioning and the corresponding relation of compressor rotary speed are specially the first linear positive function relation of the rotation speed of fan of each indoor set of compressor air-conditioning and the compressor rotary speed of compressor air-conditioning. In this embodiment, when air-conditioning is chilled water air-conditioning, step 103 only becomes the content regulated for the water valve aperture of chilled water air-conditioning, the rotation speed of fan of each indoor set of the chilled water air-conditioning namely demarcated with target wind pushing temperature according to the target return air temperature of storage and the second linear positive function relation of water valve aperture, regulate rotation speed of fan and water valve aperture, current return air temperature is regulated to target return air temperature so that current wind pushing temperature regulates to target wind pushing temperature.
In technical solution of the present invention, have employed the rotation speed of fan of each indoor set that target return air temperature is demarcated the first linear positive function relational expression with compressor rotary speed with target wind pushing temperature to regulate rotation speed of fan and compressor rotary speed, it is linear positive function relation during due to rotation speed of fan and compressor rotary speed adjustment, therefore while increasing or reduce complete machine refrigerating capacity, expand the range of accommodation of air conditioner refrigerating amount, additionally, by regulating return air temperature, the refrigeration demand amount of machine room is regulated and controled, owing to the change of return air temperature is relatively slow, therefore, the control stability of air conditioning system can be improved.
In the present invention, described linear positive function relation is not limited to Y=kx+b, and (wherein x is independent variable, Y is dependent variable, k and b is constant) form, as long as functional relationship presents the trend that dependent variable increases along with the increase of independent variable, for instance, linear positive function relation can be the piecewise function of at least two sections, every section of function of piecewise function all shows as dependent variable and increases along with the increase of independent variable, additionally, the functional value of the waypoint of piecewise function can also have saltus step.
Preferably, the rotation speed of fan of each indoor set of described compressor air-conditioning is N=Kn with the first linear positive function relation of compressor rotary speed1Second linear positive function relation of+δ, the rotation speed of fan of each indoor set of described chilled water air-conditioning and water valve aperture is N=Kn2+ δ, wherein, N represents rotation speed of fan percentage ratio, n1Represent compressor rotary speed percentage ratio, n2Representing water valve percent travel, K is positive number and is fixed value, and δ is side-play amount, the target return air temperature of each indoor set and target wind pushing temperature demarcate. as shown in Figure 3, Fig. 3 is the rotation speed of fan first linear positive function graph of relation with compressor rotary speed of compressor air-conditioning of the present invention, certainly, curve chart shown in Fig. 3 can also represent the rotation speed of fan of chilled water air-conditioning of the present invention and the second linear positive function graph of relation of water valve aperture, only abscissa becomes water valve aperture, rotation speed of fan can adopt rotation speed of fan percentage ratio to replace, rotation speed of fan percentage ratio is that current rotation speed of fan is divided by blower fan maximum (top) speed, compressor rotary speed can adopt compressor rotary speed percentage ratio to replace, compressor rotary speed percentage ratio is that current compressor rotating speed is divided by compressor maximum (top) speed, water valve aperture can adopt water valve percent travel to replace, water valve percent travel is that current water valve aperture is divided by water valve maximum opening, at N=Kn1+ δ and N=Kn2In+δ, Proportional coefficient K is fixed value, equal to tan α, only relevant with concrete air conditioning unit configuration, with N=Kn1+ δ is that example illustrates, the target return air temperature T of each setting of correspondence as shown in Figure 3ReturnWith target wind pushing temperature TSendThe N=Kn demarcated1Slope of a curve K shown in+δ is identical; At N=Kn1In+δ, offset delta is according to many group target return air temperature TReturnWith target wind pushing temperature TSendTest data interpolation is determined. When machine room thermic load changes, if air-conditioning draught fan and compressor rotary speed COEFFICIENT K according to a certain percentage changes jointly, when, after air conditioner refrigerating output and machine room heat load balance, air-conditioning return air temperature and wind pushing temperature can with its initial value approximate constant. Therefore, when needing the target wind pushing temperature setting air-conditioning as A, it controls corresponding control object in logic really is the target return air temperature R associated with A, and the refrigeration demand of air-conditioning is determined by the difference between the actual value r and target return air temperature R of return air temperature. According in refrigeration demand adjustment process, as long as rotating speed of air conditioner fan percentage ratio N and compressor rotary speed percentage ratio n is according to relational expression N=n1× K+ δ changes, and when the actual value r of return air temperature controls after target return air temperature R, then illustrates that wind pushing temperature actual value a also will be adjusted to target wind pushing temperature A automatically. For different target wind pushing temperatures and target return air temperature, corresponding curve can be calibrated, a plurality of curve in Fig. 3. When air-conditioning regulates according to refrigeration demand, as long as its blower fan and compressor rotary speed meet above-mentioned new corresponding relation N=n1× K+ δ 1, after return air temperature is controlled and is stabilized to new setting value R1, wind pushing temperature also will be adjusted to new desired value A1 automatically. Thus, in the range of operation of air conditioning system, as long as setting wind pushing temperature as some desired value, air-conditioning can find out the corresponding curve of storage, then according to the automatic runing adjustment compressor rotary speed of above-mentioned curve and rotation speed of fan, and it is stabilized to target wind pushing temperature, finally achieve above-mentioned control function. In like manner, in chilled water air-conditioning, it is also possible to by above-mentioned acquisition the second linear positive function relation N=Kn2+ δ, and chilled water air-conditioning being adjusted according to this formula, to realize return air temperature equal to target return air temperature and wind pushing temperature equal to target wind pushing temperature.
In compressor air-conditioning, the refrigeration control method of the present invention also includes:
When described current return air temperature is more than the setting value of return air temperature, the compressor rotary speed and the rotation speed of fan that control compressor air-conditioning increase according to described first linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature. Similar with this embodiment, in chilled water air-conditioning, the refrigeration control method of the present invention also includes:
When described current return air temperature is more than the setting value of return air temperature, the water valve aperture and the rotation speed of fan that control chilled water air-conditioning increase according to described second linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature.
In compressor air-conditioning, the refrigeration control method of the present invention, also include:
When described current return air temperature is less than the setting value of return air temperature, the compressor rotary speed and the rotation speed of fan that control air-conditioning reduce according to described linear positive function relation, until current return air temperature is equal to target wind pushing temperature equal to target return air temperature and current wind pushing temperature. Similar with this embodiment, in chilled water air-conditioning, the refrigeration control method of the present invention also includes:
When described current return air temperature is less than the setting value of return air temperature, the water valve aperture and the rotation speed of fan that control chilled water air-conditioning reduce according to described second linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature.
Preferably, the rotation speed of fan of each indoor set that the target return air temperature of described storage is demarcated with target wind pushing temperature obtains according to interpolation method with the first linear positive function relation of the compressor rotary speed of compressor air-conditioning; The rotation speed of fan of each indoor set of the chilled water air-conditioning that the target return air temperature of described storage is demarcated with target wind pushing temperature and the second linear positive function relation of water valve aperture obtain according to interpolation method.
It is exemplified below a specific embodiment so that the refrigeration control method of the present invention to be described, also illustrate for compressor air-conditioning as the refrigeration control system of machine room, as shown in Figure 4, Fig. 4 is the schematic flow sheet of another embodiment of the refrigeration control method of machine room of the present invention, and described refrigeration control method includes:
Step 201, the current return air temperature receiving each indoor set of air-conditioning and current wind pushing temperature;
Step 202, judge whether current return air temperature is not equal to target return air temperature; If it is, perform step 203; Otherwise, step 201 is returned;
Step 203, judge that whether current return air temperature is more than target return air temperature; If it is, perform step 204, otherwise, step 205 is performed;
Step 204, the compressor rotary speed controlling compressor air-conditioning and rotation speed of fan increase according to described first linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature.
Step 205, the compressor rotary speed controlling air-conditioning and rotation speed of fan reduce according to described first linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature.
Based on identical inventive concept, the embodiment of the present invention also provides for the refrigeration control device of a kind of machine room, the refrigeration control device of machine room is divided into the refrigeration control device of compressor air-conditioning and the refrigeration control device of chilled water air-conditioning also according to the difference of refrigeration control system, following illustrate for compressor air-conditioning, as shown in Figure 5, Fig. 5 is the refrigeration control device one example structure schematic diagram of the machine room of the present invention, and described refrigeration control device includes:
Receive device 21, for receiving the current return air temperature of each indoor set of air-conditioning and current wind pushing temperature;
Adjustment module 22, for when described current return air temperature is not equal to target return air temperature, the rotation speed of fan of each indoor set of the compressor air-conditioning that the target return air temperature according to storage is demarcated with target wind pushing temperature and the corresponding relation of compressor rotary speed, regulate rotation speed of fan and compressor rotary speed, current return air temperature is regulated to target return air temperature so that current wind pushing temperature regulates to target wind pushing temperature. In this embodiment, according to chilled water air-conditioning, then adjustment module 22 is required for the water valve aperture of chilled water air-conditioning and is adjusted, the rotation speed of fan of each indoor set of the chilled water air-conditioning namely demarcated with target wind pushing temperature according to the target return air temperature of storage and the corresponding relation of water valve aperture, regulate rotation speed of fan and water valve aperture, current return air temperature is regulated to target return air temperature so that current wind pushing temperature regulates to target wind pushing temperature.
Preferably, adjustment module 22, the first linear positive function relational expression specifically for the rotation speed of fan according to the target return air temperature stored and each indoor set of the compressor air-conditioning of target wind pushing temperature demarcation with compressor rotary speed, regulate rotation speed of fan and compressor rotary speed, current return air temperature is regulated to target return air temperature so that current wind pushing temperature regulates to target wind pushing temperature. In this embodiment, according to chilled water air-conditioning, then adjustment module 22 is required for the water valve aperture of chilled water air-conditioning and is adjusted, namely adjustment module 22 is for when described current return air temperature is not equal to target return air temperature, the rotation speed of fan of each indoor set of the chilled water air-conditioning that the target return air temperature according to storage is demarcated with target wind pushing temperature and the second linear positive function relation of water valve aperture, regulate rotation speed of fan and water valve aperture, current return air temperature is regulated to target return air temperature so that current wind pushing temperature regulates to target wind pushing temperature.
Continue referring to shown in Fig. 5, in compressor air-conditioning system, preferably, adjustment module 22 is additionally operable to when described current return air temperature is more than the setting value of return air temperature, the compressor rotary speed and the rotation speed of fan that control compressor air-conditioning increase according to described first linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature. In chilled water air-conditioning, preferably, adjustment module 22 is additionally operable to when described current return air temperature is more than the setting value of return air temperature, the water valve aperture and the rotation speed of fan that control chilled water air-conditioning increase according to described second linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature.
Continue referring to shown in Fig. 5, in compressor air-conditioning system, preferably, adjustment module 22 is additionally operable to when described current return air temperature is less than the setting value of return air temperature, the compressor rotary speed and the rotation speed of fan that control compressor air-conditioning reduce according to described first linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature. In chilled water air conditioning system, preferably, adjustment module 22 is additionally operable to when described current return air temperature is less than the setting value of return air temperature, the water valve aperture and the rotation speed of fan that control chilled water air-conditioning reduce according to described second linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature.
Technical scheme is particularly suitable in the air conditioning system closing cold passage.
Obviously, the present invention can be carried out various change and modification without deviating from the spirit and scope of the present invention by those skilled in the art. So, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. the refrigeration control method of a machine room, it is characterised in that including:
Receive the current return air temperature of each indoor set of air-conditioning and current wind pushing temperature;
When described current return air temperature is not equal to target return air temperature, the rotation speed of fan of each indoor set of the compressor air-conditioning that the target return air temperature according to storage is demarcated with target wind pushing temperature and the corresponding relation of compressor rotary speed, regulate rotation speed of fan and compressor rotary speed, current return air temperature is regulated to target return air temperature so that current wind pushing temperature regulates to target wind pushing temperature; Or, the rotation speed of fan of each indoor set of the chilled water air-conditioning that the target return air temperature according to storage is demarcated with target wind pushing temperature and the corresponding relation of water valve aperture, regulate rotation speed of fan and water valve aperture, current return air temperature is regulated to target return air temperature so that current wind pushing temperature regulates to target wind pushing temperature.
2. refrigeration control method as claimed in claim 1, it is characterized in that, the rotation speed of fan of each indoor set of described compressor air-conditioning and the corresponding relation of compressor rotary speed are the rotation speed of fan first linear positive function relation with compressor rotary speed of each indoor set of compressor air-conditioning; The rotation speed of fan of each indoor set of described chilled water air-conditioning and the corresponding relation of water valve aperture are the rotation speed of fan second linear positive function relation with water valve aperture of each indoor set of chilled water air-conditioning.
3. refrigeration control method as claimed in claim 2, it is characterised in that the first linear positive function relation of the rotation speed of fan of each indoor set of described compressor air-conditioning and compressor rotary speed is N=Kn1Second linear positive function relation of+δ, the rotation speed of fan of each indoor set of described chilled water air-conditioning and water valve aperture is N=Kn2+ δ, wherein, N represents rotation speed of fan percentage ratio, n1Represent compressor rotary speed percentage ratio, n2Representing water valve percent travel, K is positive number and is fixed value, and δ is side-play amount, the target return air temperature of each indoor set and target wind pushing temperature demarcate.
4. refrigeration control method as claimed in claim 2 or claim 3, it is characterised in that also include:
When described current return air temperature is more than the setting value of return air temperature, the compressor rotary speed and the rotation speed of fan that control compressor air-conditioning increase according to described first linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature; Or, the water valve aperture and the rotation speed of fan that control chilled water air-conditioning increase according to described second linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature.
5. refrigeration control method as claimed in claim 2 or claim 3, it is characterised in that also include:
When described current return air temperature is less than the setting value of return air temperature, the compressor rotary speed and the rotation speed of fan that control compressor air-conditioning reduce according to described first linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature; Or, the water valve aperture and the rotation speed of fan that control chilled water air-conditioning reduce according to described second linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature.
6. refrigeration control method as claimed in claim 2 or claim 3, it is characterised in that the rotation speed of fan of each indoor set that the target return air temperature of described storage and target wind pushing temperature are demarcated obtains according to interpolation method with the first linear positive function relation of compressor rotary speed; The rotation speed of fan of each indoor set of the chilled water air-conditioning that the target return air temperature of described storage is demarcated with target wind pushing temperature and the second linear positive function relation of water valve aperture obtain according to interpolation method.
7. the refrigeration control device of a machine room, it is characterised in that including:
Receive device, for receiving the current return air temperature of each indoor set of air-conditioning and current wind pushing temperature;
Adjustment module, for when described current return air temperature is not equal to target return air temperature, the rotation speed of fan of each indoor set of the compressor air-conditioning that the target return air temperature according to storage is demarcated with target wind pushing temperature and the corresponding relation of compressor rotary speed, regulate rotation speed of fan and compressor rotary speed, current return air temperature is regulated to target return air temperature so that current wind pushing temperature regulates to target wind pushing temperature; Or, the rotation speed of fan of each indoor set of the chilled water air-conditioning that the target return air temperature according to storage is demarcated with target wind pushing temperature and the corresponding relation of water valve aperture, regulate rotation speed of fan and water valve aperture, current return air temperature is regulated to target return air temperature so that current wind pushing temperature regulates to target wind pushing temperature.
8. refrigeration control device as claimed in claim 7, it is characterized in that, described adjustment module, specifically for when described current return air temperature is not equal to target return air temperature, the rotation speed of fan of each indoor set of the compressor air-conditioning that the target return air temperature according to storage is demarcated with target wind pushing temperature and the first linear positive function relation of compressor rotary speed, regulate rotation speed of fan and compressor rotary speed, current return air temperature is regulated to target return air temperature so that current wind pushing temperature regulates to target wind pushing temperature; Or, the rotation speed of fan of each indoor set of the chilled water air-conditioning that the target return air temperature according to storage is demarcated with target wind pushing temperature and the second linear positive function relation of water valve aperture, regulate rotation speed of fan and water valve aperture, current return air temperature is regulated to target return air temperature so that current wind pushing temperature regulates to target wind pushing temperature.
9. refrigeration control device as claimed in claim 8, it is characterized in that, described adjustment module is additionally operable to when described current return air temperature is more than the setting value of return air temperature, the compressor rotary speed and the rotation speed of fan that control compressor air-conditioning increase according to described first linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature; Or, the water valve aperture and the rotation speed of fan that control chilled water air-conditioning increase according to described second linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature.
10. refrigeration control device as claimed in claim 7 or 8, it is characterized in that, described adjustment module is additionally operable to when described current return air temperature is less than the setting value of return air temperature, the compressor rotary speed and the rotation speed of fan that control compressor air-conditioning reduce according to described first linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature; Or, the water valve aperture and the rotation speed of fan that control chilled water air-conditioning reduce according to described second linear positive function relation, until current return air temperature is equal to target return air temperature and current wind pushing temperature equal to target wind pushing temperature.
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Address after: Nanshan District Xueyuan Road in Shenzhen city of Guangdong province 518055 No. 1001 Nanshan Chi Park building B2 Applicant after: Vitamin Technology Co., Ltd. Applicant after: Vitamin Technology (Jiangmen) Co., Ltd. Address before: Nanshan District Xueyuan Road in Shenzhen city of Guangdong province 518055 No. 1001 Nanshan Chi Park building B2 Applicant before: Aimosheng Network Energy Source Co., Ltd. Applicant before: Emerson Network Power (Jiangmen) Co., Ltd. |
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Effective date of registration: 20181008 Address after: 518055 B2, Nanshan Zhiyuan, 1001 Nanshan District Xue Yuan Avenue, Shenzhen, Guangdong. Applicant after: Vitamin Technology Co., Ltd. Applicant after: Victoria Technology Co., Ltd. Jiangmen branch Address before: 518055 B2, Nanshan Zhiyuan, 1001 Nanshan District Xue Yuan Avenue, Shenzhen, Guangdong. Applicant before: Vitamin Technology Co., Ltd. Applicant before: Vitamin Technology (Jiangmen) Co., Ltd. |
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