CN114198825A - Control method and device for single cooling of chilled water inter-row air conditioner and inter-row air conditioner - Google Patents
Control method and device for single cooling of chilled water inter-row air conditioner and inter-row air conditioner Download PDFInfo
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- 238000001816 cooling Methods 0.000 title claims abstract description 39
- 230000033228 biological regulation Effects 0.000 claims abstract description 18
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 230000001276 controlling effect Effects 0.000 claims description 9
- 238000004378 air conditioning Methods 0.000 claims description 6
- 238000005057 refrigeration Methods 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 11
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- 238000004891 communication Methods 0.000 description 5
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- 238000004590 computer program Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
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- 238000005859 coupling reaction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
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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
- F24F5/0003—Exclusively-fluid systems
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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
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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
- F24F11/62—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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F11/88—Electrical aspects, e.g. circuits
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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
- F24F2140/20—Heat-exchange fluid temperature
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The application relates to the technical field of refrigeration, and discloses a control method for single cooling of an air conditioner between chilled water trains, wherein the air conditioner between chilled water trains comprises a chilled water system, the chilled water system comprises a cooling coil and a fan, the cooling coil comprises a water inlet and a water outlet which are arranged at the end parts, and a water valve is arranged at the water inlet; the control method comprises the following steps: acquiring the temperature difference of inlet and outlet water of chilled water and the current air pressure of an air outlet of a fan; determining the target opening of a water valve according to the water inlet and outlet temperature difference, and determining the target rotating speed of the fan according to the current wind pressure; and determining and executing an adjusting scheme of a water valve and a fan according to the target opening and the target rotating speed. The method can directly adjust the fan and the water valve based on the operation parameters of the air conditioner between the columns, namely the temperature of inlet and outlet water of chilled water and the air pressure of the fan. The timeliness of regulation can be guaranteed, and the temperature can quickly reach a stable state. The application also discloses a control device for the single cooling of the chilled water inter-row air conditioner and the chilled water inter-row air conditioner.
Description
Technical Field
The application relates to the technical field of refrigeration control, in particular to a control method and device for single cooling of a chilled water inter-train air conditioner and the chilled water inter-train air conditioner.
Background
At present, an air conditioning system between chilled water trains is widely applied to a machine room due to the characteristics of high refrigeration efficiency, high heat density heat dissipation and the like. The refrigeration effect of the chilled water inter-train air conditioner directly influences the reliability of the operation of equipment in the machine room.
In the related art, a control method of an air conditioner of a chilled water machine room is disclosed, which comprises the steps of controlling the opening and closing of a water valve and a fan through the return air temperature and the supply air temperature; the opening degree of the water valve and the air quantity of the fan are adjusted by comparing the actual return air temperature with a set value and comparing the actual air supply temperature with a set temperature; so that the temperature of the machine room reaches the set temperature.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
and adjusting a water valve and a fan according to the outside temperature, namely the return air temperature and the supply air temperature. Resulting in a lag in temperature control and not conducive to rapid temperature plateau.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a method and a device for controlling single cooling of a chilled water inter-row air conditioner and the chilled water inter-row air conditioner, so as to improve the speed of temperature control and enable the temperature to quickly reach a stable state.
In some embodiments, the chilled water inter-train air conditioner comprises a chilled water system, the chilled water system comprises a cooling coil and a fan, the cooling coil comprises a water inlet and a water outlet arranged at the ends, and a water valve is arranged at the water inlet; the method comprises the following steps: acquiring the temperature difference of inlet and outlet water of chilled water and the current air pressure of an air outlet of a fan; determining the target opening of a water valve according to the water inlet and outlet temperature difference, and determining the target rotating speed of the fan according to the current air pressure; and determining and executing an adjusting scheme of a water valve and a fan according to the target opening and the target rotating speed.
In some embodiments, the apparatus comprises: a processor and a memory storing program instructions, the processor being configured to execute the control method for chilled water inter-train air conditioning single cold as described above when executing the program instructions.
In some embodiments, the chilled water inter-train air conditioner includes: the chilled water system comprises a cooling coil, a water inlet and a water outlet which are arranged at the end part of the cooling coil, and a water valve is arranged at the water inlet; and the control device for the single cooling of the air conditioner between the chilled water trains.
The control method and device for single cooling of the chilled water inter-train air conditioner and the chilled water inter-train air conditioner provided by the embodiment of the disclosure can realize the following technical effects:
in the embodiment of the disclosure, the water temperature of the inlet and the outlet of the cooling coil and the air pressure of the air outlet of the fan are collected, and then the target opening of the water valve and the target rotating speed of the fan are determined; and controlling the water valve and the fan to execute a corresponding regulation scheme according to the target opening and the target rotating speed. In this way, the fan and the water valve are adjusted directly based on the operation parameters of the inter-train air conditioner without depending on the external ring environment parameters; the timeliness of regulation can be guaranteed, and the temperature is rapidly stabilized at the set temperature.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
FIG. 1 is a schematic diagram of a control method for single cooling of a chilled water train air conditioner according to an embodiment of the disclosure;
FIG. 2 is a schematic diagram illustrating a target opening of a water valve determined according to a temperature difference between inlet and outlet water in a control method provided by an embodiment of the disclosure;
fig. 3 is a schematic diagram illustrating that, in the control method provided by the embodiment of the present disclosure, a target rotation speed of a fan is determined according to a current wind pressure;
fig. 4 is a schematic diagram illustrating a control method according to an embodiment of the present disclosure, in which a water valve and a fan are determined and executed according to a target opening and a target rotation speed;
FIG. 5 is a schematic diagram of a control device for chilled water train air conditioning unit cooling according to an embodiment of the disclosure;
fig. 6 is a schematic diagram of another control device for single cooling of a chilled water train air conditioner provided by the embodiment of the disclosure.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The term "plurality" means two or more unless otherwise specified.
In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.
The term "correspond" may refer to an association or binding relationship, and a corresponds to B refers to an association or binding relationship between a and B.
The inter-row air conditioner is a precise refrigeration system for a high-heat-density rack and is applied to the inter-row server cabinet of a data center. It achieves near-end refrigeration in close proximity to the heat source, thereby reducing energy consumption. The inter-row air conditioner mainly adopts condensing modes such as air cooling, water cooling, chilled water and the like. In the embodiment of the disclosure, the refrigeration control of the chilled water inter-train air conditioner is mainly aimed at. The chilled water inter-row air conditioner comprises a compressor refrigerating system, a chilled water system and a cooling water system, wherein the chilled water system and an evaporator of the compressor refrigerating system form a heat exchange loop, a refrigerant in the evaporator evaporates to cool water in the chilled water system to form chilled water, and the chilled water in the chilled water system realizes heat exchange with heat in a machine room through a cooling coil under the action of a fan; the end part of the cooling coil is provided with a water inlet and a water outlet, the water inlet is connected with a chilled water supply pipeline of a chilled water system, and a water valve is arranged on the connecting pipeline.
Referring to fig. 1, an embodiment of the present disclosure provides a control method for single cooling of a chilled water train air conditioner, including:
and S01, the processor obtains the temperature difference of inlet and outlet of the chilled water and the current wind pressure of the air outlet of the fan.
In the embodiment of the disclosure, the temperature detection elements are respectively arranged at the water inlet and the water outlet of the cooling coil to detect the water inlet temperature and the water outlet temperature of the chilled water. The temperature difference between the inlet water and the outlet water of the chilled water is obtained through the inlet water temperature and the outlet water temperature, wherein the temperature difference between the inlet water and the outlet water is equal to the outlet water temperature-the inlet water temperature. And a pressure detection element is arranged at an air outlet of the fan to detect the current air pressure of the fan. Therefore, the temperature difference of inlet and outlet water of the chilled water and the current wind pressure of the fan can be accurately obtained through the detection element.
And S02, the processor determines the target opening of the water valve according to the water inlet and outlet temperature difference and determines the target rotating speed of the fan according to the current wind pressure.
After the temperature difference of inlet and outlet water of the chilled water and the air pressure of the fan are obtained, the target opening degree of the water valve and the target rotating speed of the fan can be determined according to the size relation between the current parameter and the set parameter. Specifically, if the temperature difference between the inlet water and the outlet water is greater than the set temperature difference, the refrigerating capacity is insufficient, and the opening degree of the water valve needs to be adjusted. Wherein, the larger the difference between the temperature difference of the inlet and outlet water and the set temperature difference is, the larger the opening degree of the required water valve is. The target opening degree of the water valve can be determined according to the corresponding relation between the difference value of the water inlet and outlet temperature difference and the set temperature difference and the opening degree of the water valve. Likewise, the target rotation speed of the fan may be determined based on the current wind pressure and the set wind pressure.
In some embodiments, a target opening of the water valve and a target speed of the fan may be determined based on a PID (proportional-Integral-Differential) controller. For example, based on the inlet and outlet water temperature difference and the set temperature difference, the PID controller outputs a target outlet water temperature difference. And determining the target opening degree of the water valve according to the corresponding relation between the target water outlet temperature difference and the opening degree of the water valve.
And S03, the processor determines and executes the regulation scheme of the water valve and the fan according to the target opening and the target rotating speed.
In the embodiment of the disclosure, the regulation schemes of the water valve and the fan are determined based on the target opening and the target rotating speed, and the water valve and the fan are controlled to execute the regulation schemes. As an example, an opening degree threshold value is set. In the case where the target opening degree is less than or equal to the opening degree threshold value, adjusting the opening degree of the water valve to the target opening degree may be determined as an adjustment scheme of the water valve. And under the condition that the target opening degree is larger than the opening degree threshold value, determining that the water regulating scheme is to regulate the opening degree of the water valve to the target opening degree according to a preset regulating rate. And after the adjustment scheme is determined, controlling the water valve and the fan to execute the corresponding adjustment scheme. Likewise, a fan regulation scheme may be determined and executed. So, through adjusting water valve opening and fan rotational speed, realize the quick control to the temperature.
By adopting the control method for the chilled water inter-row air conditioner single cooling provided by the embodiment of the disclosure, the fan and the water valve can be directly adjusted based on the operation parameters of the inter-row air conditioner, namely the inlet and outlet water temperature of the chilled water and the air pressure of the fan. Make the temperature reach stable state fast, compare through external environment parameter regulation fan and water valve among the prior art, the response rate of this scheme is fast and control more accurate.
Optionally, as shown in fig. 2, in step S02, the processor determines the target opening of the water valve according to the difference between the inlet and outlet water temperatures, including:
and S21, the processor periodically calculates the target temperature difference of the inlet and outlet water according to the temperature difference of the inlet and outlet water and the preset temperature difference.
And S22, the processor determines the target opening degree corresponding to the water valve according to the target temperature difference of the inlet and outlet water.
In the embodiment of the disclosure, the target opening degree of the water valve is determined according to the PID controller. Specifically, a preset temperature difference and a detected water inlet and outlet temperature difference are input, and a water inlet and outlet target temperature difference of the current control period is obtained through the internal operation of the PID controller. And in the next control period, calculating to obtain the target temperature difference of the inlet and outlet water in the control period based on the preset temperature difference and the current inlet and outlet water temperature difference. And thus, after the target temperature difference of the inlet water and the outlet water is calculated, the target opening degree of the water valve corresponding to each control period is determined according to the corresponding relation between the target temperature difference of the outlet water and the opening degree of the water valve. Therefore, in each control period, the corresponding target temperature difference can be fed back and calculated in time according to the temperature difference output condition. And further, the target opening degree of each control period is determined, so that the temperature can be controlled quickly and accurately.
Optionally, in step S22, the determining, by the processor, a target opening degree corresponding to the water valve according to the target temperature difference between the inlet water and the outlet water includes:
processor calculates Yi＝Ymin+(Ymax-Ymin)*ΔTi/100；
Wherein, YiIs the target opening degree of the water valve in the ith control period, YminIs the minimum opening of the water valve, YmaxAt maximum opening of the water valve, Δ TiThe target temperature difference of inlet and outlet water in the ith control period.
In the embodiment of the disclosure, the target temperature difference of the inlet and outlet water is periodically calculated. For example, in the ith control period, the target temperature difference between the inlet and outlet water is Δ TiThen, the target opening Y of the water valve can be calculated and obtained according to the formulai. Here, the maximum opening and the minimum opening of the water valve may be set according to an actual operating condition. The calculation mode can avoid the condition that the opening of the water valve is zero when the temperature difference of inlet and outlet water is close to or equal to the preset temperature difference. When the temperature of the water valve reaches a stable state, a certain opening degree can be kept, so that the refrigeration system can stably circulate.
Alternatively, as shown in fig. 3, in step S02, the processor determines the target rotation speed of the fan according to the current wind pressure, including:
and S23, the processor periodically calculates the target wind pressure of the fan according to the current wind pressure and the preset wind pressure.
And S24, the processor determines the target rotating speed corresponding to the fan according to the target wind pressure.
In the embodiment of the disclosure, the target rotating speed of the fan is determined according to the PID controller. Specifically, a preset wind pressure and an obtained current wind pressure are input, and a target wind pressure of a current control period is obtained through the internal operation of the PID controller. And in the next control period, calculating to obtain the target wind pressure of the control period based on the preset temperature difference and the target wind pressure of the previous period. Therefore, after the target wind pressure is periodically calculated, the target opening degree of the fan corresponding to each control period is determined according to the corresponding relation between the target wind pressure and the rotating speed of the fan. Therefore, the corresponding target rotating speed can be fed back and calculated in time according to the wind pressure condition of each period. Which helps to achieve accurate temperature control.
Optionally, in step S24, the processor determines a target rotation speed corresponding to the fan according to the target wind pressure, including:
processor calculates Vi＝Vmin+(VRated value-Vmin)*Pi/100；
Wherein, ViIs the target speed, V, of the fan at the ith control cycleminIs the minimum rotational speed, V, of the fanRated valueRated cooling speed, P, of the faniThe target wind pressure of the fan in the ith control period.
In the embodiment of the disclosure, the target rotating speed of the fan is periodically calculated. For example, in the ith control period, the target wind pressure is PiThen, the target rotating speed V of the fan can be calculated and obtained according to the formulai. Here, the minimum rotational speed V of the fanminCan be set according to the refrigeration working condition. The calculation mode can avoid the condition that the rotating speed of the fan is zero when the wind pressure of the fan is close to or equal to the preset wind pressure. So that the fan can keep a certain rotating speed when the temperature reaches a stable state, and the refrigeration system can circulate.
Optionally, as shown in fig. 4, in step S03, the processor determines and executes an adjustment scheme of the water valve and the fan according to the target opening and the target rotation speed, where the adjustment scheme includes:
and S31, the processor acquires the current opening of the water valve and the current rotating speed of the fan, and calculates the opening adjustment quantity of the water valve and the rotating speed adjustment quantity of the fan.
And S32, the processor determines and executes the adjusting scheme of the water valve and the fan according to the opening degree adjusting quantity and the rotating speed adjusting quantity.
In the embodiment of the disclosure, after the target opening degree of the water valve and the target rotating speed of the fan are determined, the current opening degree of the water valve and the current rotating speed of the fan are obtained. Thus, the opening degree adjustment amount and the rotation speed adjustment amount of the water outlet valve can be calculated. For example, the target opening of the water valve is YobjCurrent opening degree is YrelIf the opening degree adjustment quantity delta Y is equal to Yobj-Yrel. Further, the adjustment of the water valve is determined and performed according to the opening adjustment amountAnd (4) scheme. For example, an adjustment step size is set, and the water valve adjusts the opening according to the adjustment amount when the opening adjustment amount is smaller than the adjustment step size. And under the condition that the opening adjustment amount is larger than or equal to the adjustment step length, the water valve gradually adjusts the opening according to the adjustment speed until the adjustment amount is met. Likewise, fan speed regulation may be achieved.
In addition, when the target opening degree corresponding to the water valve is periodically determined, the opening degree adjustment amount of the water valve needs to be periodically calculated. Namely, in each control period, determining the target opening degree of the control period, and acquiring the current opening degree of the water valve at the initial stage of the control period. And further calculating the water valve opening regulating quantity of the control period. Then, as described above, the adjustment scheme of the water valve is determined and executed according to the adjustment amount of the opening degree of the water valve in each cycle. And also, periodically calculating the rotating speed regulating quantity of the fan, and determining and executing a regulating scheme of the fan. Therefore, in the adjusting process, the unstable problem caused by over-adjustment or frequent adjustment can be avoided. The method is favorable for ensuring the stability of adjustment while being quickly adjusted.
Optionally, in step S32, the processor determines and executes an adjustment scheme of the water valve and the fan according to the opening degree adjustment amount and the rotation speed adjustment amount, including:
the processor controls the water valve to adjust according to the first step length under the condition that the opening adjustment amount is larger than or equal to a first adjustment threshold value; and/or the processor controls the fan to adjust according to the second step length under the condition that the rotating speed adjusting amount is larger than or equal to the second adjusting threshold value.
In the embodiment of the disclosure, an adjustment threshold is set for defining the magnitude of the adjustment amount. Specifically, if the opening degree adjustment amount is greater than or equal to the first adjustment threshold, it indicates that the opening degree adjustment amount is large. If the opening degree of the water valve is directly adjusted according to the opening degree adjusting quantity, overshoot may be caused. In this case, the control water valve is therefore adjusted according to the first step. Here, the first step is a set value, and may range from 0.1%/second to 2%/second. Similarly, when the fan speed regulating quantity is larger than or equal to the second regulating threshold value, the fan is controlled to regulate according to the second step length. Here, the second step size may range from 50 to 100 rpm. Therefore, when the adjustment amount is large, a gradual adjustment mode is adopted, so that the opening degree of the water valve is gradually adjusted to the target opening degree. Overshoot can be avoided, resulting in large temperature fluctuations.
Optionally, in step S32, the processor determines and executes an adjustment scheme of the water valve and the fan according to the opening degree adjustment amount and the rotation speed adjustment amount, including:
under the condition that the opening adjustment amount is smaller than a first adjustment threshold value, the processor controls the water valve to keep the current opening; and/or controlling the fan to keep the current rotating speed by the processor under the condition that the rotating speed regulating quantity is smaller than a second regulating threshold value.
In the embodiment of the disclosure, when the opening adjustment amount is small, the opening of the water valve is maintained. Or when the rotating speed regulating quantity is small, the rotating speed of the fan is maintained. Therefore, when the adjustment amount is small, frequent adjustment of the water valve or the fan can be avoided. In some embodiments, the first adjustment threshold is greater than the first step size. In this case, if the opening degree adjustment amount is smaller than the first adjustment threshold, the water valve is controlled to adjust the opening degree in accordance with the opening degree adjustment amount. The same applies to the regulation of the fan speed. Therefore, under the condition that the adjustment quantity is smaller than the first adjustment threshold and larger than the first step length, the water valve or the fan is controlled to adjust according to the adjustment quantity. The temperature can be adjusted quickly, and the problem of unstable adjustment is avoided.
Referring to fig. 5, an embodiment of the present disclosure provides a control apparatus for single cooling of a chilled water train air conditioner, including an obtaining module 51, a determining module 52, and an executing module 53. The obtaining module 51 is configured to obtain the temperature difference between the inlet and the outlet of the chilled water and the current air pressure at the air outlet of the fan; the determining module 52 is configured to determine a target opening degree of the water valve according to the water inlet and outlet temperature difference, and determine a target rotating speed of the fan according to the current wind pressure; the execution module 53 is configured to determine and execute a water valve and fan adjustment scheme according to the target opening and the target rotation speed.
By adopting the control device for the chilled water inter-row air conditioner single cooling, provided by the embodiment of the disclosure, the fan and the water valve are directly adjusted based on the operation parameters of the inter-row air conditioner without depending on the external ring environment parameters. The timeliness of regulation can be guaranteed, and the temperature is enabled to be rapidly and stably set.
As shown in fig. 6, an embodiment of the present disclosure provides a control device for single cooling of a chilled water train air conditioner, which includes a processor (processor)600 and a memory (memory) 601. Optionally, the apparatus may also include a Communication Interface 602 and a bus 603. The processor 600, the communication interface 602, and the memory 601 may communicate with each other via a bus 603. The communication interface 602 may be used for information transfer. The processor 600 may call logic instructions in the memory 601 to perform the control method for freezing the chilled water train air conditioner single cold of the above embodiment.
In addition, the logic instructions in the memory 601 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 101, which is a computer-readable storage medium, may be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes functional applications and data processing by executing program instructions/modules stored in the memory 101, that is, implements the control method for freezing single cold of the inter-water train air conditioner in the above-described embodiment.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the disclosure provides a chilled water inter-train air conditioner, which comprises a chilled water system, wherein the chilled water system comprises a cooling coil, a water inlet and a water outlet which are arranged at the end part of the cooling coil, and a water valve is arranged at the water inlet; and the control device for the single cooling of the air conditioner between the chilled water trains.
The embodiment of the disclosure provides a computer-readable storage medium, which stores computer-executable instructions configured to execute the control method for single cooling of a chilled water train air conditioner.
An embodiment of the present disclosure provides a computer program product including a computer program stored on a computer-readable storage medium, the computer program including program instructions that, when executed by a computer, cause the computer to execute the above-described control method for chilled water train air conditioning single cold.
The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A control method for single cooling of a chilled water inter-train air conditioner comprises a chilled water system, wherein the chilled water system comprises a cooling coil and a fan, the cooling coil comprises a water inlet and a water outlet which are arranged at the end parts, and a water valve is arranged at the water inlet; the control method is characterized by comprising the following steps:
acquiring the temperature difference of inlet and outlet water of chilled water and the current air pressure of an air outlet of a fan;
determining the target opening of a water valve according to the water inlet and outlet temperature difference, and determining the target rotating speed of the fan according to the current wind pressure;
and determining and executing an adjusting scheme of a water valve and a fan according to the target opening and the target rotating speed.
2. The method of claim 1, wherein determining the target opening of the water valve based on the difference between the inlet and outlet water temperatures comprises:
periodically calculating the target temperature difference of the inlet and outlet water according to the temperature difference of the inlet and outlet water and the preset temperature difference;
and determining the target opening degree corresponding to the water valve according to the target temperature difference of the inlet water and the outlet water.
3. The method of claim 2, wherein determining the target opening degree corresponding to the water valve according to the target temperature difference of the inlet and outlet water comprises:
calculating Yi＝Ymin+(Ymax-Ymin)*ΔTi/100；
Wherein, YiIs the target opening degree of the water valve in the ith control period, YminIs the minimum opening of the water valve, YmaxAt maximum opening of the water valve, Δ TiAnd (4) in the ith control period, i is 1, ….
4. The method of claim 1, wherein determining a target speed of the wind turbine based on the current wind pressure comprises:
periodically calculating the target wind pressure of the fan according to the current wind pressure and the preset wind pressure;
and determining a target rotating speed corresponding to the fan according to the target wind pressure.
5. The method of claim 4, wherein the determining the target rotation speed corresponding to the fan according to the target wind pressure comprises:
calculating Vi＝Vmin+(VRated value-Vmin)*Pi/100；
Wherein, ViIs the target speed, V, of the fan at the ith control cycleminIs the minimum rotational speed, V, of the fanRated valueRated cooling speed, P, of the faniThe target wind pressure of the fan in the ith control period is i-1, ….
6. The method of any one of claims 1 to 5, wherein determining and executing a water valve and fan regulation scheme according to the target opening and the target rotation speed comprises:
acquiring the current opening of the water valve and the current rotating speed of the fan, and calculating the opening adjusting quantity of the water valve and the rotating speed adjusting quantity of the fan;
and determining and executing an adjusting scheme of a water valve and a fan according to the opening adjusting quantity and the rotating speed adjusting quantity.
7. The method of claim 6, wherein determining and executing a water valve and fan regulation scheme according to the opening degree regulation quantity and the rotation speed regulation quantity comprises:
controlling the water valve to adjust according to a first step length under the condition that the opening degree adjusting quantity is larger than or equal to a first adjusting threshold value; and/or controlling the fan to adjust according to a second step length under the condition that the rotating speed adjusting amount is larger than or equal to a second adjusting threshold value.
8. The method of claim 6, wherein determining and executing the water valve and fan regulation scheme according to the opening degree regulation quantity and the rotation speed regulation quantity comprises:
controlling the water valve to keep the current opening degree under the condition that the opening degree regulating quantity is smaller than a first regulating threshold value; and/or controlling the fan to keep the current rotating speed under the condition that the rotating speed regulating quantity is smaller than a second regulating threshold value.
9. A control apparatus for chilled water inter-train air conditioning single cold, comprising a processor and a memory storing program instructions, wherein the processor is configured to execute the control method for chilled water inter-train air conditioning single cold according to any one of claims 1 to 8 when executing the program instructions.
10. The chilled water inter-train air conditioner is characterized by comprising a chilled water system, wherein the chilled water system comprises a cooling coil and a fan, the cooling coil comprises a water inlet and a water outlet which are arranged at the end parts, and a water valve is arranged at the water inlet; and a control device for a chilled water train air conditioner unit as claimed in claim 9.
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| CN202111330946.0A CN114198825A (en) | 2021-11-11 | 2021-11-11 | Control method and device for single cooling of chilled water inter-row air conditioner and inter-row air conditioner |
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| CN202111330946.0A CN114198825A (en) | 2021-11-11 | 2021-11-11 | Control method and device for single cooling of chilled water inter-row air conditioner and inter-row air conditioner |
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