CN104896626A - Refrigeration control method and device for air-cooled water chilling unit and unit system - Google Patents
Refrigeration control method and device for air-cooled water chilling unit and unit system Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 67
- 238000005057 refrigeration Methods 0.000 title claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 9
- 238000001816 cooling Methods 0.000 claims description 81
- 238000006243 chemical reaction Methods 0.000 claims description 74
- 230000008569 process Effects 0.000 claims description 36
- 238000001514 detection method Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 description 9
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010977 unit operation Methods 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Air Conditioning Control Device (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention discloses a refrigeration control method and device for an air-cooled water chilling unit and a unit system. The method comprises the following steps: receiving a high-pressure signal of the air-cooled water chilling unit, and starting a variable-frequency fan set of the air-cooled water chilling unit when the high-pressure of the air-cooled water chilling unit is greater than a first preset high-pressure value A; detecting the high-pressure of the air-cooled water chilling unit at intervals of preset time T, and comparing the high-pressure with a preset fan unit adjusting pressure value; when the high-pressure is greater than a first preset high-pressure value A, a fan unit is additionally started; when the high-pressure is less than or equal to a second preset pressure value B, increasing and closing one fan unit; when the high-pressure is in the preset adjusting range of the variable-frequency fan unit, the output air quantity of the opened variable-frequency fan unit is increased or reduced according to the high-pressure. The variable frequency fan set is opened preferentially, and when the ambient temperature is low, the high-pressure of the unit is adjusted through the adjustable variable frequency fan set, so that ultralow-temperature refrigeration is realized.
Description
Technical field
The present invention relates to household appliance technical field, particularly relate to a kind of cooling by wind refrigeration control method, control device and machine set system.
Background technology
In industry, business, life, along with progress and the raising of science and technology, the requirement of air-conditioning treatment technology is grown with each passing day, not only require cool in summer and warm in winter, and have the cold summer in requirement winter cool, for large-sized wind cooling type handpiece Water Chilling Units (air-cooled screw, module machine), common control method cannot meet requirement of freezing winter.
In Chinese large-sized cooling by wind, the minimum environment temperature of industry acquiescence refrigerating operaton design is 18 DEG C, and in actual demand, part special area such as reactor, special machine room, Medical Devices district etc. need to realize annual cooling, and now unit realizes refrigeration under needing to remain on environment temperature-15 DEG C ~-20 DEG C environment temperatures.Because compressor reliability service needs to guarantee certain high pressure range and height pressure reduction; at this moment will consider that how controlling fan delivery change guarantees that unit has a rational high-pressure, to guarantee that unit over range can not run and have enough pressure reduction to guarantee the circulation of compressor inside cold oil.When environment temperature is low, fin condenser heat exchange property is good, and the air quantity now needed is less, and the fixed blower fan frequently of tradition is difficult to accomplish little air quantity requirement.And existing control method can not meet the requirement of cryogenic refrigeration.
Summary of the invention
Based on this, be necessary to provide a kind of cooling by wind refrigeration control method, control device and the machine set system that can pass through to freeze to the regulable control realization of fan delivery in low temperature environment.
For realizing a kind of cooling by wind refrigeration control method that the object of the invention provides, comprise the following steps:
Receive the high-pressure signal of cooling by wind, when the high-pressure of described cooling by wind is greater than the first preset high-pressure force value A, open a frequency conversion fan group of described cooling by wind;
Detect the high-pressure of described cooling by wind every preset time T, and more described high-pressure regulates the size of force value with the blower fan group preset;
When described high-pressure is greater than described first preset high-pressure force value A, increase unlatching blower fan group; When described high-pressure is less than or equal to the second preset pressure value B, increase closedown blower fan group;
When described high-pressure is preset in adjustable range in described frequency conversion fan group, increase according to described high-pressure size or reduce the discharge quantity of fan of the frequency conversion fan group of having opened.
As a kind of embodiment of cooling by wind refrigeration control method, further comprising the steps of:
Detect the high-pressure of described cooling by wind, and send high-pressure signal.
As a kind of embodiment of cooling by wind refrigeration control method, when described high-pressure is greater than described first preset high-pressure force value A, increase unlatching blower fan group; When described high-pressure is less than or equal to the second preset pressure value B, increases closedown blower fan group, comprise the following steps:
Judge whether described high-pressure is greater than described first preset high-pressure force value A, obtains the first judged result;
According to described first judged result, if described high-pressure is greater than described first preset high-pressure force value A, then increase unlatching blower fan group;
According to described first judged result, if described high-pressure is less than or equal to described first preset high-pressure force value A, then judge whether described high-pressure is less than or equal to described second preset pressure value B, obtains the second judged result further;
According to described second judged result, if described high-pressure is less than or equal to described second preset pressure value B, then increase closedown blower fan group;
According to described second judged result, if described high-pressure is greater than described second preset pressure value B, then keep the quantity of the blower fan group of current unlatching constant.
As a kind of embodiment of cooling by wind refrigeration control method, it is described when described high-pressure is preset in adjustable range in described frequency conversion fan group, increase according to described high-pressure size or reduce the discharge quantity of fan of the frequency conversion fan group of having opened, comprising the following steps:
Judge whether described high-pressure is greater than described 3rd preset high-pressure force value a, obtains the 3rd judged result;
According to described 3rd judged result, if described high-pressure is greater than described 3rd preset high-pressure force value a, then the discharge quantity of fan controlling described frequency conversion fan group increases the first predetermined adjustment;
According to described 3rd judged result, if described high-pressure is less than or equal to described 3rd preset high-pressure force value a, then judge whether described high-pressure is less than or equal to described 4th preset pressure value b, obtains the 4th judged result further;
According to described 4th judged result, if described high-pressure is less than or equal to described 4th preset pressure value b, then the discharge quantity of fan controlling described frequency conversion fan group reduces the second predetermined adjustment;
According to described 4th judged result, if described high-pressure is greater than described 4th preset pressure value b, then keep the current setting of blower fan group constant.
As a kind of embodiment of cooling by wind refrigeration control method, described preset time T is 3 ~ 10 seconds.
Based on a kind of cooling by wind refrigeration control device of same inventive concept, comprise startup module, detection module, first arranges module, and second arranges module, wherein
Described startup module, for receiving the high-pressure signal of cooling by wind, when the high-pressure of described cooling by wind is greater than the first preset high-pressure force value A, opens a frequency conversion fan group of described cooling by wind;
Described detection module, for detecting the high-pressure of described cooling by wind every preset time T, and more described high-pressure regulates the size of force value with the blower fan group preset;
Described first arranges module, for when described high-pressure is greater than described first preset high-pressure force value A, increases unlatching blower fan group; When described high-pressure is less than or equal to the second preset pressure value B, increase closedown blower fan group;
Described second arranges module, for when described high-pressure is preset in adjustable range in described frequency conversion fan group, increases or reduce the discharge quantity of fan of the frequency conversion fan group of having opened according to described high-pressure size.
As a kind of embodiment of cooling by wind refrigeration control device, described first arranges module comprises the first judgement submodule, the first process submodule, and second judges submodule, the second process submodule, and the 3rd process submodule, wherein:
Described first judges submodule, for judging whether described high-pressure is greater than described first preset high-pressure force value A, obtains the first judged result;
Described first process submodule, for according to described first judged result, if described high-pressure is greater than described first preset high-pressure force value A, then increases unlatching blower fan group;
Described second judges submodule, for according to described first judged result, if described high-pressure is less than or equal to described first preset high-pressure force value A, then judge whether described high-pressure is less than or equal to described second preset pressure value B, obtains the second judged result further;
Described second process submodule, for according to described second judged result, if described high-pressure is less than or equal to described second preset pressure value B, then increases closedown blower fan group;
Described 3rd process submodule, for according to described second judged result, if described high-pressure is greater than described second preset pressure value B, then keeps the quantity of the blower fan group of current unlatching constant.
As a kind of embodiment of cooling by wind refrigeration control device, described second arranges module comprises the 3rd and judges submodule, the 4th process submodule, and the 4th judges submodule, the 5th process submodule, and the 6th processes submodule, wherein:
Described 3rd judges submodule, for judging whether described high-pressure is greater than described 3rd preset high-pressure force value a, obtains the 3rd judged result;
Described 4th process submodule, for according to described 3rd judged result, if described high-pressure is greater than described 3rd preset high-pressure force value a, then the discharge quantity of fan controlling described frequency conversion fan group increases the first predetermined adjustment;
Described 4th judges submodule, for according to described 3rd judged result, if described high-pressure is less than or equal to described 3rd preset high-pressure force value a, then judge whether described high-pressure is less than or equal to described 4th preset pressure value b, obtains the 4th judged result further;
Described 5th process submodule, for according to described 4th judged result, if described high-pressure is less than or equal to described 4th preset pressure value b, then the discharge quantity of fan controlling described frequency conversion fan group reduces the second predetermined adjustment;
Described 6th process submodule, for according to described 4th judged result, if described high-pressure is greater than described 4th preset pressure value b, then keeps the current setting of blower fan group constant;
Described second processing unit, for according to described 5th judged result, when described high-pressure not interval (a, b] in scope time, return and perform the described 3rd and judge submodule.
As a kind of embodiment of cooling by wind refrigeration control device, described preset time T is 3 ~ 10 seconds.
Based on a kind of cooling by wind system of identical inventive concept, comprise compressor, condenser, evaporimeter, blower fan, expansion valve, also comprise aforesaid cooling by wind refrigeration control device;
Described blower fan is divided into multiple blower fan group, and at least one blower fan group is made up of frequency conversion fan.
As a kind of embodiment of cooling by wind system, also comprise pressure sensor;
Described pressure sensor is connected with described control device communication, for detecting the high-pressure of cooling by wind, and sends high-pressure signal to described control device.
Beneficial effect of the present invention comprises:
A kind of cooling by wind refrigeration control method provided by the invention, control device and machine set system, preferentially open frequency conversion fan group, lower in environment temperature, when not meeting other blower fan group unlocking conditions, regulate unit high-pressure by adjustable frequency conversion fan group, thus realize super low temperature refrigeration.And super low temperature refrigeration adopts frequency conversion fan to control, and accurately controls unit high pressure, has high comprehensive energy efficiency ratio and reliability.Under ultralow environment temperature, fixed blower fan does not frequently meet unlocking condition, only opens frequency conversion fan, by regulating the air quantity of frequency conversion fan, makes unit high-pressure be in a most ideal value, realizes most high energy efficiency ratio and reliability.
Accompanying drawing explanation
Fig. 1 is the flow chart of a specific embodiment of a kind of cooling by wind refrigeration control method of the present invention;
Fig. 2 is that the blower fan group of a specific embodiment of a kind of cooling by wind refrigeration control method of the present invention opens control flow chart;
Fig. 3 is the frequency conversion fan group adjustment control flow chart of a specific embodiment of a kind of cooling by wind refrigeration control method of the present invention;
Fig. 4 is that the controller of a specific embodiment of a kind of cooling by wind refrigeration control method of the present invention controls schematic diagram;
Fig. 5 is the system architecture schematic diagram of a specific embodiment of a kind of cooling by wind refrigeration control device of the present invention.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, be described below in conjunction with the detailed description of the invention of accompanying drawing to cooling by wind refrigeration control method of the present invention, control device and machine set system.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The cooling by wind refrigeration control method of the embodiment of the present invention, as shown in Figure 1, comprises the following steps:
S100, receives the high-pressure signal of cooling by wind, when the high-pressure of described cooling by wind is greater than the first preset high-pressure force value A, opens a frequency conversion fan group of described cooling by wind.
S200, detects the high-pressure of described cooling by wind every preset time T, and more described high-pressure regulates the size of force value with the blower fan group preset.
S300, when described high-pressure is greater than described first preset high-pressure force value A, increases unlatching blower fan group; When described high-pressure is less than or equal to the second preset pressure value B, increase closedown blower fan group.
S400, when described high-pressure is preset in adjustable range in described frequency conversion fan group, increases according to described high-pressure size or reduces the discharge quantity of fan of the frequency conversion fan group of having opened.
In the embodiment of the present invention, the blower fan on fin condenser is divided into many groups by corresponding air-cooled water chiller, and have at least one group to be frequency conversion fan in described many group blower fan groups, other groups can be made up of quota blower fan under normal circumstances.Certainly, also can comprise multiple blower fan group be made up of frequency conversion fan in unit, or all blower fans in unit are all frequency conversion fan.And step S300 and step S400 does not have continuous continuous relationship, the judgement in two steps and perform separate execution.
A Fans can be comprised in described blower fan group, equally also can comprise the blower fan of more than two.Concrete implementation step for convenience of description, thinks under description default situations below and comprises a Fans in blower fan group.
In the embodiment of the present invention, preferentially open frequency conversion fan group, the default adjustable range to high-pressure of described frequency conversion fan group is between [A, B] and critical value is less than A and be greater than B respectively.Therefore, lower in environment temperature, when not meeting other blower fan group unlocking conditions, regulate unit high-pressure by adjustable frequency conversion fan group, thus realize super low temperature refrigeration.And super low temperature refrigeration adopts frequency conversion fan to control, and accurately controls unit high pressure, has high comprehensive energy efficiency ratio and reliability.Under ultralow environment temperature, fixed blower fan does not frequently meet unlocking condition, only opens frequency conversion fan, by regulating the air quantity of frequency conversion fan, makes unit high-pressure be in a most ideal value, realizes most high energy efficiency ratio and reliability.
In the embodiment of a cooling by wind refrigeration control method wherein, further comprising the steps of:
Detect the high-pressure of described cooling by wind, and send high-pressure signal.Use the pressure sensor in unit to detect the high-pressure of unit, and send high-voltage signal in the controller of unit, controller compares judgement according to the high-pressure signal received to pressure size, and controls each blower fan group and run on request.
In the embodiment of a cooling by wind refrigeration control method wherein, as shown in Figure 2, step S300 comprises the following steps:
S310, judges whether described high-pressure is greater than described first preset high-pressure force value A, obtains the first judged result.
S320, according to described first judged result, if described high-pressure is greater than described first preset high-pressure force value A, then increases unlatching blower fan group.High-pressure is reduced more rapidly.
S330, according to described first judged result, if described high-pressure is less than or equal to described first preset high-pressure force value A, then judges whether described high-pressure is less than or equal to described second preset pressure value B, obtains the second judged result further.
S340, according to described second judged result, if described high-pressure is less than or equal to described second preset pressure value B, then increases closedown blower fan group.High-pressure is raised.
It should be noted that herein, open the order backward each other of blower fan group and closedown blower fan group, the frequency conversion fan group of namely opening at first is finally closed, the guarantee blower fan group switch failure moment like this carries out the new energy of cryogenic refrigeration of regulating guarantee unit and higher Energy Efficiency Ratio to high-pressure by frequency conversion fan group.
S350, according to described second judged result, if described high-pressure is greater than described second preset pressure value B, then keeps the quantity of the blower fan group of current unlatching constant.
As shown in Figure 2; comparing of high-pressure and B has been carried out equally after increasing unlatching blower fan group; the judgement of high-pressure whether in the interval range of B and A composition is also had after increasing closedown blower fan group; avoid the appearance of judging by accident on the one hand, also can play a protective role to unit performance fluctuation simultaneously.
In the embodiment of a cooling by wind refrigeration control method wherein, as shown in Figure 3, step S400, comprises the following steps:
S410, judges whether described high-pressure is greater than described 3rd preset high-pressure force value a, obtains the 3rd judged result.
S420, according to described 3rd judged result, if described high-pressure is greater than described 3rd preset high-pressure force value a, then the discharge quantity of fan controlling described frequency conversion fan group increases the first predetermined adjustment.
S430, according to described 3rd judged result, if described high-pressure is less than or equal to described 3rd preset high-pressure force value a, then judges whether described high-pressure is less than or equal to described 4th preset pressure value b, obtains the 4th judged result further.
S440, according to described 4th judged result, if described high-pressure is less than or equal to described 4th preset pressure value b, then the discharge quantity of fan controlling described frequency conversion fan group reduces the second predetermined adjustment.
S450, according to described 4th judged result, if described high-pressure is greater than described 4th preset pressure value b, then keeps the current setting of blower fan group constant.
Similar with aforesaid step S310-step S350, step S410-step S450 is the control and regulation to frequency conversion fan group.As shown in Figure 4, controller in air-cooled water chiller controls opening or closing of all blower fan groups in unit (a frequency conversion fan group and N number of fixed blower fan group frequently) by AC contact control switch, and sends air quantity of variable-frequency fan regulable control signal when needed to the frequency conversion fan in frequency conversion fan group.When frequency conversion fan group is opened, the difference of controller environmentally temperature, gives frequency conversion fan and provides different initial voltages or frequency, make blower fan have an initial air quantity V
0afterwards, judge high pressure, as high pressure>=a, increase control inputs voltage or the frequency of certain value to frequency conversion fan, as high pressure < b, reduce control inputs voltage or the frequency of certain value to frequency conversion fan, as b≤high pressure < a, frequency conversion fan remains unchanged.Controller controls the open and close that blower fan A.C. contactor realizes blower fan, and controller controls controller of fan to the adjustable voltage of frequency conversion fan input 0 ~ 10V and changes air quantity.
It should be noted that, a<A, in one embodiment A-a=50(kPa herein), b-B=50(kPa), the value of A-a, b-B can be set as other values unequal in other embodiments.
Accurately control unit high-pressure by the adjustment of accurate frequency conversion fan discharge quantity of fan in the embodiment of the present invention, realize cryogenic refrigeration, and there is high comprehensive energy efficiency ratio and reliability.
In the embodiment of the present invention, further high-pressure scope is judged, avoid erroneous judgement in preceding step to affect Fan Regulation, also effectively can prevent the impact that the Fan Regulation of unit operation parameter fluctuation controls.
Preferably, in the embodiment of other cooling by wind refrigeration control methods, described preset time T is 3 ~ 10 seconds.Preset Time can select a numerical value to arrange between 3S to 10S, within the time interval of this scope, both can ensure unit refrigeration performance, will because of frequent switch blower fan, or frequently regulate and control to cause device damage excessive to frequency conversion fan again.
Based on same inventive concept, a kind of cooling by wind refrigeration control device is also provided, the principle of dealing with problems due to this system is similar to aforementioned a kind of cooling by wind refrigeration control method, therefore, the enforcement of this system can realize according to the concrete steps of preceding method, repeats part and repeats no more.
A kind of cooling by wind refrigeration control device of the embodiment of the present invention, as shown in Figure 5, comprise and start module 100, detection module 200, first arranges module 300, and second arranges module 400.Wherein said startup module 100, for receiving the high-pressure signal of cooling by wind, when the high-pressure of described cooling by wind is greater than the first preset high-pressure force value A, opens a frequency conversion fan group of described cooling by wind; Described detection module 200, for detecting the high-pressure of described cooling by wind every preset time T, and more described high-pressure regulates the size of force value with the blower fan group preset; Described first arranges module 300, for when described high-pressure is greater than described first preset high-pressure force value A, increases unlatching blower fan group; When described high-pressure is less than or equal to the second preset pressure value B, increase closedown blower fan group; Described second arranges module 400, for when described high-pressure is preset in adjustable range in described frequency conversion fan group, increases or reduce the discharge quantity of fan of the frequency conversion fan group of having opened according to described high-pressure size.
In the embodiment of the present invention, preferentially open frequency conversion fan group, the default adjustable range to high-pressure of described frequency conversion fan group is between [A, B] and critical value is less than A and be greater than B respectively.Therefore, lower in environment temperature, when not meeting other blower fan group unlocking conditions, regulate unit high-pressure by adjustable frequency conversion fan group, thus realize super low temperature refrigeration.And super low temperature refrigeration adopts frequency conversion fan to control, and accurately controls unit high pressure, has high comprehensive energy efficiency ratio and reliability.Under ultralow environment temperature, fixed blower fan does not frequently meet unlocking condition, only opens frequency conversion fan, by regulating the air quantity of frequency conversion fan, makes unit high-pressure be in a most ideal value, realizes most high energy efficiency ratio and reliability.
In the embodiment of a cooling by wind refrigeration control device wherein, described first arrange module 300 comprise first judgement submodule 310, first process submodule 320, the second judge submodule 330, second process submodule 340, and the 3rd process submodule 350.Wherein: described first judges submodule 310, for judging whether described high-pressure is greater than described first preset high-pressure force value A, obtains the first judged result; Described first process submodule 320, for according to described first judged result, if described high-pressure is greater than described first preset high-pressure force value A, then increases unlatching blower fan group; Described second judges submodule 330, for according to described first judged result, if described high-pressure is less than or equal to described first preset high-pressure force value A, then judge whether described high-pressure is less than or equal to described second preset pressure value B, obtains the second judged result further; Described second process submodule 340, for according to described second judged result, if described high-pressure is less than or equal to described second preset pressure value B, then increases closedown blower fan group; Described 3rd process submodule 350, for according to described second judged result, if described high-pressure is greater than described second preset pressure value B, then keeps the quantity of the blower fan group of current unlatching constant.
In the embodiment of a cooling by wind refrigeration control device wherein, described second arranges module 400 comprises the 3rd and judges submodule 410, and the 4th process submodule the 420, four judges submodule 430,5th process submodule 440, and the 6th process submodule 450.Wherein: the described 3rd judges submodule 410, for judging whether described high-pressure is greater than described 3rd preset high-pressure force value a, obtains the 3rd judged result; Described 4th process submodule 420, for according to described 3rd judged result, if described high-pressure is greater than described 3rd preset high-pressure force value a, then the discharge quantity of fan controlling described frequency conversion fan group increases the first predetermined adjustment; Described 4th judges submodule 430, for according to described 3rd judged result, if described high-pressure is less than or equal to described 3rd preset high-pressure force value a, then judge whether described high-pressure is less than or equal to described 4th preset pressure value b, obtains the 4th judged result further; Described 5th process submodule 440, for according to described 4th judged result, if described high-pressure is less than or equal to described 4th preset pressure value b, then the discharge quantity of fan controlling described frequency conversion fan group reduces the second predetermined adjustment; Described 6th process submodule 450, for according to described 4th judged result, if described high-pressure is greater than described 4th preset pressure value b, then keeps the current setting of blower fan group constant.
Accurately control unit high-pressure by the adjustment of accurate frequency conversion fan discharge quantity of fan in the embodiment of the present invention, realize cryogenic refrigeration, and there is high comprehensive energy efficiency ratio and reliability.
In the embodiment of the present invention, further high-pressure scope is judged, avoid erroneous judgement in preceding step to affect Fan Regulation, also effectively can prevent the impact that the Fan Regulation of unit operation parameter fluctuation controls.
In the embodiment of a cooling by wind refrigeration control device wherein, described preset time T is 3 ~ 10 seconds.
Based on a kind of cooling by wind system of identical inventive concept, comprise compressor, condenser, evaporimeter, blower fan, expansion valve, also comprise aforesaid cooling by wind refrigeration control device, and described blower fan is divided into multiple blower fan group, and at least one blower fan group is made up of frequency conversion fan.
In the embodiment of a cooling by wind system wherein, also comprise pressure sensor;
Described pressure sensor is connected with described control device communication, for detecting the high-pressure of cooling by wind, and sends high-pressure signal to described control device.Blower fan high-pressure is recorded by pressure sensor, the high-pressure recorded feeds back to controller, controller controls the open and close that blower fan A.C. contactor realizes blower fan, controller controls controller of fan to the adjustable voltage of frequency conversion fan input 0 ~ 10V and changes air quantity, thus realizes cryogenic refrigeration.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (11)
1. a cooling by wind refrigeration control method, is characterized in that, comprises the following steps:
Receive the high-pressure signal of cooling by wind, when the high-pressure of described cooling by wind is greater than the first preset high-pressure force value A, open a frequency conversion fan group of described cooling by wind;
Detect the high-pressure of described cooling by wind every preset time T, and more described high-pressure regulates the size of force value with the blower fan group preset;
When described high-pressure is greater than described first preset high-pressure force value A, increase unlatching blower fan group; When described high-pressure is less than or equal to the second preset pressure value B, increase closedown blower fan group;
When described high-pressure is preset in adjustable range in described frequency conversion fan group, increase according to described high-pressure size or reduce the discharge quantity of fan of the frequency conversion fan group of having opened.
2. cooling by wind refrigeration control method according to claim 1, is characterized in that, further comprising the steps of:
Detect the high-pressure of described cooling by wind, and send high-pressure signal.
3. cooling by wind refrigeration control method according to claim 1, is characterized in that, when described high-pressure is greater than described first preset high-pressure force value A, increases unlatching blower fan group; When described high-pressure is less than or equal to the second preset pressure value B, increases closedown blower fan group, comprise the following steps:
Judge whether described high-pressure is greater than described first preset high-pressure force value A, obtains the first judged result;
According to described first judged result, if described high-pressure is greater than described first preset high-pressure force value A, then increase unlatching blower fan group;
According to described first judged result, if described high-pressure is less than or equal to described first preset high-pressure force value A, then judge whether described high-pressure is less than or equal to described second preset pressure value B, obtains the second judged result further;
According to described second judged result, if described high-pressure is less than or equal to described second preset pressure value B, then increase closedown blower fan group;
According to described second judged result, if described high-pressure is greater than described second preset pressure value B, then keep the quantity of the blower fan group of current unlatching constant.
4. cooling by wind refrigeration control method according to claim 1, it is characterized in that, it is described when described high-pressure is preset in adjustable range in described frequency conversion fan group, increase according to described high-pressure size or reduce the discharge quantity of fan of the frequency conversion fan group of having opened, comprising the following steps:
Judge whether described high-pressure is greater than described 3rd preset high-pressure force value a, obtains the 3rd judged result;
According to described 3rd judged result, if described high-pressure is greater than described 3rd preset high-pressure force value a, then the discharge quantity of fan controlling described frequency conversion fan group increases the first predetermined adjustment;
According to described 3rd judged result, if described high-pressure is less than or equal to described 3rd preset high-pressure force value a, then judge whether described high-pressure is less than or equal to described 4th preset pressure value b, obtains the 4th judged result further;
According to described 4th judged result, if described high-pressure is less than or equal to described 4th preset pressure value b, then the discharge quantity of fan controlling described frequency conversion fan group reduces the second predetermined adjustment;
According to described 4th judged result, if described high-pressure is greater than described 4th preset pressure value b, then keep the current setting of blower fan group constant.
5. the cooling by wind refrigeration control method according to any one of Claims 1-4, is characterized in that, described preset time T is 3 ~ 10 seconds.
6. a cooling by wind refrigeration control device, is characterized in that, comprises startup module, detection module, and first arranges module, and second arranges module, wherein:
Described startup module, for receiving the high-pressure signal of cooling by wind, when the high-pressure of described cooling by wind is greater than the first preset high-pressure force value A, opens a frequency conversion fan group of described cooling by wind;
Described detection module, for detecting the high-pressure of described cooling by wind every preset time T, and more described high-pressure regulates the size of force value with the blower fan group preset;
Described first arranges module, for when described high-pressure is greater than described first preset high-pressure force value A, increases unlatching blower fan group; When described high-pressure is less than or equal to the second preset pressure value B, increase closedown blower fan group;
Described second arranges module, for when described high-pressure is preset in adjustable range in described frequency conversion fan group, increases or reduce the discharge quantity of fan of the frequency conversion fan group of having opened according to described high-pressure size.
7. cooling by wind refrigeration control device according to claim 6, is characterized in that, described first arranges module comprises the first judgement submodule, first process submodule, second judges submodule, the second process submodule, and the 3rd processes submodule, wherein:
Described first judges submodule, for judging whether described high-pressure is greater than described first preset high-pressure force value A, obtains the first judged result;
Described first process submodule, for according to described first judged result, if described high-pressure is greater than described first preset high-pressure force value A, then increases unlatching blower fan group;
Described second judges submodule, for according to described first judged result, if described high-pressure is less than or equal to described first preset high-pressure force value A, then judge whether described high-pressure is less than or equal to described second preset pressure value B, obtains the second judged result further;
Described second process submodule, for according to described second judged result, if described high-pressure is less than or equal to described second preset pressure value B, then increases closedown blower fan group;
Described 3rd process submodule, for according to described second judged result, if described high-pressure is greater than described second preset pressure value B, then keeps the quantity of the blower fan group of current unlatching constant.
8. cooling by wind refrigeration control device according to claim 6, is characterized in that, described second arranges module comprises the 3rd and judge submodule, 4th process submodule, the 4th judges submodule, the 5th process submodule, and the 6th processes submodule, wherein:
Described 3rd judges submodule, for judging whether described high-pressure is greater than described 3rd preset high-pressure force value a, obtains the 3rd judged result;
Described 4th process submodule, for according to described 3rd judged result, if described high-pressure is greater than described 3rd preset high-pressure force value a, then the discharge quantity of fan controlling described frequency conversion fan group increases the first predetermined adjustment;
Described 4th judges submodule, for according to described 3rd judged result, if described high-pressure is less than or equal to described 3rd preset high-pressure force value a, then judge whether described high-pressure is less than or equal to described 4th preset pressure value b, obtains the 4th judged result further;
Described 5th process submodule, for according to described 4th judged result, if described high-pressure is less than or equal to described 4th preset pressure value b, then the discharge quantity of fan controlling described frequency conversion fan group reduces the second predetermined adjustment;
Described 6th process submodule, for according to described 4th judged result, if described high-pressure is greater than described 4th preset pressure value b, then keeps the current setting of blower fan group constant;
Described second processing unit, for according to described 5th judged result, when described high-pressure not interval (a, b] in scope time, return and perform the described 3rd and judge submodule.
9. the cooling by wind refrigeration control device according to any one of claim 6 to 8, is characterized in that, described preset time T is 3 ~ 10 seconds.
10. a cooling by wind system, comprises compressor, condenser, evaporimeter, blower fan, expansion valve, it is characterized in that, also comprises the cooling by wind refrigeration control device described in any one of claim 6 to 9;
Described blower fan is divided into multiple blower fan group, and at least one blower fan group is made up of frequency conversion fan.
11. cooling by wind systems according to claim 10, is characterized in that, also comprise pressure sensor;
Described pressure sensor is connected with described control device communication, for detecting the high-pressure of cooling by wind, and sends high-pressure signal to described control device.
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