CN115854499B - Air conditioning unit control method, air conditioning unit and computer readable storage medium - Google Patents
Air conditioning unit control method, air conditioning unit and computer readable storage medium Download PDFInfo
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- CN115854499B CN115854499B CN202211651563.8A CN202211651563A CN115854499B CN 115854499 B CN115854499 B CN 115854499B CN 202211651563 A CN202211651563 A CN 202211651563A CN 115854499 B CN115854499 B CN 115854499B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000005057 refrigeration Methods 0.000 claims description 50
- 238000004590 computer program Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 abstract description 10
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses an air conditioning unit control method, an air conditioning unit and a computer readable storage medium, comprising the following steps: determining the running number of the unit according to the absolute value delta T0 of the difference value between the ambient temperature T and the preset air outlet temperature T0; and determining the running number of the refrigerating system in each unit according to the absolute value delta Tn of the difference value between the ambient temperature Tn of the area where the condenser of each unit is located and the preset air outlet temperature T0. According to the invention, the number of the units in the refrigerating unit and the running number of the refrigerating systems are regulated, so that the whole refrigerating unit is in an optimal performance state, when the cooling demand is lower than that of the existing units or refrigerating systems, the number of the corresponding units or refrigerating systems can be reduced, so that the single refrigerating system can maintain an optimal load state, and the intervention of a temperature control system is required in the whole process, so that the whole system can judge the cooling capacity more accurately, and the increase of the system power consumption caused by larger errors is avoided.
Description
Technical Field
The present invention relates to the field of air conditioning technologies, and in particular, to an air conditioning unit control method, an air conditioning unit, and a computer readable storage medium.
Background
The electric energy consumed by the refrigerating equipment in China accounts for 6% -7% of the total power consumption in China, and the refrigerating machine is the part with the largest energy consumption and accounts for about half of the energy consumption of the system in the central air conditioning system. The load of the air conditioner refrigerating system can be changed along with the change of outdoor weather parameters, and the existing refrigerating equipment generally sets the optimal efficiency point on rated capacity output, so that the refrigerating unit in the actual running process can be in a partial load state for a long time, and the running efficiency is low. Moreover, the energy consumption of the refrigeration host machine can show non-uniform change along with the increase of the load of the refrigeration host machine, and when a plurality of units are operated, the energy consumption of the refrigeration host machine can be different due to different load distribution, so that the overall energy utilization efficiency is influenced.
Disclosure of Invention
The invention provides an air conditioning unit control method, an air conditioning unit and a computer readable storage medium for solving the technical problem that load distribution is unreasonable and operation energy efficiency is affected due to unmatched operation quantity of multiple units in the prior art.
The technical scheme adopted by the invention is as follows:
The invention provides a control method of an air conditioning unit, which comprises the following steps:
determining the running number of the unit according to the absolute value delta T0 of the difference value between the ambient temperature T and the preset air outlet temperature T0;
And determining the running number of the refrigerating system in each unit according to the absolute value delta Tn of the difference value between the ambient temperature Tn of the area where the condenser of each unit is located and the preset air outlet temperature T0.
And determining whether the operation frequency of the compressor of the refrigerating system needs to be adjusted according to the absolute value of the difference value between the inlet air temperature Tn' of each refrigerating system condenser and the preset outlet air temperature T0.
The above-mentioned determining the number of operation units by the absolute value Δt0 of the difference between the ambient temperature T and the preset air outlet temperature T0 specifically includes the steps of: and judging whether the absolute value delta T0 of the difference value between the ambient temperature T and the preset air outlet temperature T0 is larger than or equal to the preset difference value Ta, if not, operating a single unit, and if so, operating a plurality of units.
The determining the operation number of the refrigerating system in each unit by the absolute value deltatn of the difference between the ambient temperature Tn of the area where the condenser of each unit is located and the preset air outlet temperature T0 specifically includes the steps of: and judging whether the absolute value delta Tn of the difference value between the ambient temperature Tn of the area where the condenser is positioned and the preset air outlet temperature T0 is larger than or equal to a preset difference value Tb, if so, operating a plurality of refrigeration systems, and if not, operating a single refrigeration system.
The above-mentioned determining whether to need to adjust the operation frequency of the compressor of the refrigeration system according to the absolute value of the difference between the inlet air temperature Tn' and the preset outlet air temperature T0 of each refrigeration system condenser specifically includes the steps of: judging whether the absolute value of the difference between the air inlet temperature Tn 'of the condenser of the refrigeration system and the preset air outlet temperature T0 is equal to a preset difference Tc, if yes, judging that the load balance is met, ending the control, and if not, adjusting the running frequency of the compressor until the absolute value of the difference between the air inlet temperature Tn' of the condenser of the refrigeration system and the preset air outlet temperature T0 is equal to the preset difference Tc.
The above-mentioned adjustment to the compressor operating frequency is specifically: when the absolute value of the difference between the air inlet temperature Tn' of the condenser of the refrigeration system and the preset air outlet temperature T0 is larger than the preset difference Tc, the operation frequency of the compressor of the refrigeration system is increased; and when the absolute value of the difference between the air inlet temperature Tn' and the preset air outlet temperature T0 of the condenser of the refrigeration system is smaller than the preset difference Tc, reducing the running frequency of the compressor of the refrigeration system.
The invention also provides an air conditioning unit, and the running number of the units and the running number of the refrigerating systems in each unit are adjusted by using the control method of the air conditioning unit.
Further, the air conditioning unit includes a plurality of units, each including a plurality of refrigeration systems.
Specifically, each unit includes: the refrigerating system comprises an evaporator, a plurality of circulating pipelines connected with the evaporator in parallel, and a condenser, a compressor and a throttle valve which are arranged on the same circulating pipeline.
The invention also provides a computer readable storage medium for storing a computer program, and the computer program executes the air conditioning unit control method when running.
Compared with the prior art, the invention ensures that the whole refrigerating unit is in the state of optimal performance by adjusting the number of units in the refrigerating unit and the running number of the refrigerating systems, and when the cooling demand is lower than the number of the existing units or refrigerating systems, the number of the corresponding units or refrigerating systems can be reduced so as to ensure that the single refrigerating system maintains the optimal load state, and the intervention of a temperature control system is required in the whole process, so that the whole system judges the cooling capacity more accurately, and the increase of the system power consumption caused by larger errors is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flowchart showing steps one and two in an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a third step in an embodiment of the present invention;
FIG. 3 is a flowchart showing a third embodiment of the present invention;
FIG. 4 is a piping structure diagram of a single unit in an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The principles and structures of the present invention are described in detail below with reference to the drawings and the examples.
In the existing refrigeration equipment, the optimal efficiency point is generally set on rated capacity output, so that the refrigeration unit in the actual operation process is in a partial load state for a long time, and the operation efficiency is low. Moreover, the energy consumption of the refrigeration host machine can show non-uniform change along with the increase of the load of the refrigeration host machine, and when a plurality of units are operated, the energy consumption of the refrigeration host machine can be different due to different load distribution, so that the overall energy utilization efficiency is influenced. The number of units operated and the number of refrigeration systems in each unit need to be adjusted to increase the efficiency of energy utilization. In this regard, the invention provides a control method of an air conditioning unit, which can adjust the running number of the unit and the refrigerating systems in the single unit according to actual conditions, and improve the energy utilization efficiency.
As shown in fig. 1, the invention provides a control method of an air conditioning unit, which specifically includes the steps of:
Step one, determining the running number of a unit according to the absolute value delta T0 of the difference value between the ambient temperature T and the preset air outlet temperature T0 (the air outlet temperature refers to the set air outlet temperature of the evaporator); the enthalpy value of the air conditioner can be determined by the ambient temperature, the air outlet temperature and the corresponding relative humidity, and the required cooling load is calculated by Q=qmΔh; determining that the number of units operated is substantially a preliminary balancing of the load by comparing the ambient temperature with the outlet air temperature;
Step two, determining the running number of the refrigerating systems in each unit according to the absolute value delta Tn of the difference value between the ambient temperature Tn of the area where the condenser of each unit is located and the preset air outlet temperature T0;
after the running number of the units is determined, the number of the refrigerating systems in each unit is adjusted, because the condensers of all the units are placed nearby, the mutual temperature influence exists among the condensers, so that the environment temperatures of the positions of the condensers of different units are different, the actual condenser environment temperature Tn of each unit can be determined independently by determining that the condensers have heat exchange and the temperatures of the condensers are mutually influenced, the heat exchange efficiency of the actual condenser environment temperature Tn of each unit can be further determined, the running number of the refrigerating systems which need to be started is determined, and the energy utilization efficiency is further improved.
And step three, determining whether the operation frequency of the compressor of the refrigerating system needs to be adjusted according to the absolute value of the difference value between the inlet air temperature Tn' of each refrigerating system condenser and the preset outlet air temperature T0. So that the whole system can meet the load balance.
As shown in fig. 1, in a specific embodiment, determining the number of operation units according to the absolute value Δt0 of the difference between the ambient temperature T and the preset outlet air temperature T0 in the first step specifically includes:
and judging whether the absolute value delta T0 of the difference value between the ambient temperature T and the preset air outlet temperature T0 is larger than or equal to the preset difference value Ta, if not, operating a single unit, and if so, operating a plurality of units.
Specifically, the temperature range may be further subdivided to determine the number of units running, for example, three units in total, two units are turned on when Δt0 is greater than or equal to Ta ', three units are turned on when Δt0 is greater than or equal to Ta ", and Ta' is less than Ta", which may be specifically divided according to the actual situation and the number of units of the whole machine.
In a specific embodiment, as shown in fig. 1, determining the number of operation of the refrigeration system in each unit by the absolute value Δtn of the difference between the ambient temperature Tn of the area where the condenser of each unit is located and the preset outlet air temperature T0 in the second step specifically includes:
Judging whether the absolute value delta Tn of the difference value between the ambient temperature Tn of the area where the condenser of the unit is located and the preset air outlet temperature T0 is larger than or equal to a preset difference value Tb, if so, operating a plurality of refrigeration systems by the unit, and if not, operating a single refrigeration system by the unit; so that the number of refrigeration systems operated per unit can be determined.
Specifically, the temperature range may be further subdivided to determine the number of operating multiple refrigeration systems, such as three total refrigeration systems, two being turned on when Δtn is greater than or equal to Tb ', three being turned on when Δtn is greater than or equal to Tb ", and Tb' being less than Tb", which may be specifically divided according to the actual situation and the number of refrigeration systems in each unit.
In a specific embodiment, as shown in fig. 2, determining whether the operation frequency of the compressor of the refrigeration system needs to be adjusted according to the absolute value of the difference between the inlet air temperature Tn' and the preset outlet air temperature T0 of each refrigeration system condenser in the second step specifically includes:
Firstly judging whether the absolute value of the difference between the air inlet temperature Tn 'of the condenser of the refrigeration system and the preset air outlet temperature T0 is equal to a preset difference Tc, if yes, judging that the load balance is met, ending the control of the refrigeration system, and if not, adjusting the running frequency of the compressor in the refrigeration system until the absolute value of the difference between the air inlet temperature Tn' of the condenser of the refrigeration system and the preset air outlet temperature T0 is equal to the preset difference Tc.
As shown in fig. 3, further, the adjustment of the compressor operation frequency is specifically: when the absolute value of the difference between the air inlet temperature Tn' of the condenser of the refrigeration system and the preset air outlet temperature T0 is larger than the preset difference Tc, the operation frequency of the compressor of the refrigeration system is increased; and when the absolute value of the difference between the air inlet temperature Tn' and the preset air outlet temperature T0 of the condenser of the refrigeration system is smaller than the preset difference Tc, reducing the running frequency of the compressor of the refrigeration system.
The invention also provides an air conditioning unit, and the running number of the units and the running number of the refrigerating systems in each unit are adjusted by using the control method of the air conditioning unit.
The air conditioning unit specifically comprises a plurality of units, and each unit comprises a plurality of refrigeration systems.
As shown in fig. 4, the unit is shown as a unit, and specifically includes: an evaporator 1 and a plurality of circulation lines connecting the evaporators 1 in parallel; that is, an evaporator 1 is provided in a unit, and a plurality of circulation pipes are connected to the evaporator 1 to supply cold or heat to the evaporator 1, and a condenser 3, a compressor 2 and a throttle valve 4 are provided on each circulation pipe, that is, a part on each circulation pipe and the evaporator 1 are used as a refrigerating system, the condenser 3 may be further provided with a water cooling pipe connected to a cooling tower 5, a cooling water circulation pump 6 and an expansion tank 7 are provided on the cooling pipe, and heat exchange amount is increased by cooling of the cooling tower when the whole machine is refrigerating.
The invention also provides a computer readable storage medium for storing a computer program, which executes the air conditioning unit control method when running.
It is noted that the above-mentioned terms are used merely to describe specific embodiments, and are not intended to limit exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present application, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present application.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An air conditioning unit control method is characterized in that the air conditioning unit comprises a plurality of units, and each unit comprises a plurality of refrigeration systems; each of the units comprises: the evaporator, a plurality of parallelly connected the circulation pipeline of evaporator, refrigerating system is the same the condenser, compressor and the choke valve that set up on the circulation pipeline, include the step:
determining the running number of the unit according to the absolute value delta T0 of the difference value between the ambient temperature T and the preset air outlet temperature T0;
Determining the operation quantity of the refrigerating system in each unit according to the absolute value delta Tn of the difference value between the ambient temperature Tn of the area where the condenser of each unit operates and the preset air outlet temperature T0;
The method for determining the running number of the unit by the absolute value delta T0 of the difference value between the ambient temperature T and the preset air outlet temperature T0 specifically comprises the following steps: judging whether the absolute value delta T0 of the difference value between the ambient temperature T and the preset air outlet temperature T0 is larger than or equal to the preset difference value Ta, if not, operating a single unit, and if so, operating a plurality of units;
the method for determining the operation quantity of the refrigerating system in each unit specifically comprises the following steps of: and judging whether the absolute value delta Tn of the difference value between the ambient temperature Tn of the area where the condenser is positioned and the preset air outlet temperature T0 is larger than or equal to a preset difference value Tb, if so, operating a plurality of refrigeration systems, and if not, operating a single refrigeration system.
2. The air conditioning unit control method according to claim 1, further comprising the step of: and determining whether the operation frequency of the compressor of the refrigerating system needs to be adjusted according to the absolute value of the difference value between the inlet air temperature Tn' of each refrigerating system condenser and the preset outlet air temperature T0.
3. The control method of an air conditioning unit according to claim 2, wherein the determining whether the operation frequency of the compressor of the refrigeration system needs to be adjusted according to the absolute value of the difference between the inlet air temperature Tn' and the preset outlet air temperature T0 of the condenser of each refrigeration system comprises the steps of: judging whether the absolute value of the difference between the air inlet temperature Tn 'of the condenser of the refrigeration system and the preset air outlet temperature T0 is equal to a preset difference Tc, if yes, judging that the load balance is met, ending the control, and if not, adjusting the running frequency of the compressor until the absolute value of the difference between the air inlet temperature Tn' of the condenser of the refrigeration system and the preset air outlet temperature T0 is equal to the preset difference Tc.
4. The air conditioning unit control method according to claim 3, wherein the adjusting of the compressor operation frequency is specifically: when the absolute value of the difference between the air inlet temperature Tn' of the condenser of the refrigeration system and the preset air outlet temperature T0 is larger than the preset difference Tc, the operation frequency of the compressor of the refrigeration system is increased; and when the absolute value of the difference between the air inlet temperature Tn' and the preset air outlet temperature T0 of the condenser of the refrigeration system is smaller than the preset difference Tc, reducing the running frequency of the compressor of the refrigeration system.
5. An air conditioning unit, characterized in that the number of operation of the units and the number of operation of the refrigeration system in each unit are adjusted using the air conditioning unit control method according to any one of claims 1 to 4.
6. A computer-readable storage medium storing a computer program, wherein the computer program, when run, performs the air conditioning unit control method according to any one of claims 1 to 4.
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