CN115900003A - Multi-double-cold-source refrigerating device unit control method, device and system and unit - Google Patents
Multi-double-cold-source refrigerating device unit control method, device and system and unit Download PDFInfo
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- 239000007788 liquid Substances 0.000 claims abstract description 167
- 238000005057 refrigeration Methods 0.000 claims abstract description 72
- 230000009977 dual effect Effects 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 10
- 238000005485 electric heating Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 abstract description 12
- 238000005265 energy consumption Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
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- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
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Abstract
The invention discloses a method, a device and a system for controlling a unit of a multi-double-cold-source refrigerating device and the unit, relating to the field of refrigeration control; when the outdoor environment temperature is lower than the preset outdoor environment temperature, the outdoor environment temperature is lower, and the double-cold-source refrigerating device enters a surface cooler refrigerating mode to enable the unit to have certain refrigerating capacity; the target liquid supply temperatures are different and indicate different requirements on the refrigerating capacity of the unit, so that the target switching temperature is determined according to the target liquid supply temperature, and when the outdoor environment temperature is less than or equal to the target switching temperature, the refrigerating device is controlled to enter a surface cooling refrigerating mode, so that the refrigerating capacity of the unit can be ensured to meet the refrigerating requirement, and the double-cold-source refrigerating device is controlled to enter a surface cooler refrigerating mode as far as possible to reduce energy consumption.
Description
Technical Field
The invention relates to the field of refrigeration control, in particular to a method, a device, a system and a unit for controlling a multi-double-cold-source refrigeration device.
Background
The refrigeration device generally adopts the air-conditioning refrigeration principle, namely a compressor is adopted for refrigeration; in some application scenarios with low ambient temperature, a dual-cold-source refrigeration device is proposed, as shown in fig. 1, the refrigeration device has two operation modes, one is a compressor refrigeration mode, in which the first electromagnetic valve 10 is opened and the second electromagnetic valve 12 is closed; the compressor 1 works to compress a refrigerant, then the refrigerant sequentially passes through the condenser 4, the expansion valve 5 and the plate heat exchanger 6, and the refrigerant returns to the compressor 1 after exchanging heat at the plate heat exchanger 6; the other mode is a surface cooler refrigeration mode, in the refrigeration mode, the first electromagnetic valve 10 is closed, the second electromagnetic valve 12 is opened, at the moment, the compressor 1 does not work, and the heat exchanger 9 is used for refrigerating, so that the external low-temperature environment is fully utilized, and energy is saved.
In practical applications, if the refrigeration requirement is large, a plurality of double-cold-source refrigeration devices are designed, as shown in fig. 2, the refrigeration capacities of the multiple refrigeration device units are different in the compressor refrigeration mode and the surface cooler refrigeration mode. When the outdoor environment temperature is low, if all the refrigerating devices adopt a compressor refrigerating mode, the energy consumption of the unit is large; if all the refrigerating devices adopt the surface cooler refrigerating mode, the refrigerating requirements may not be met.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method, a device, a system and a unit for controlling a multi-double-cold-source refrigerating device unit, so as to solve the problem that the unit consumes more energy if all refrigerating devices adopt a compressor refrigerating mode when the outdoor environment temperature is low; and if all refrigerating plant all adopt the surface cooler mode of refrigeration, then probably can not satisfy the problem of refrigeration demand.
The technical scheme adopted by the invention for solving the technical problem is as follows:
in a first aspect, a method for controlling a multi-dual cold source refrigeration device unit is provided, which includes the following steps:
acquiring a target liquid supply temperature and an outdoor environment temperature;
when the outdoor environment temperature is less than or equal to a preset outdoor environment temperature, determining the target switching temperature according to the target liquid supply temperature;
and when the outdoor environment temperature is less than or equal to the target switching temperature, controlling the double-cold-source refrigerating device to enter a surface air cooler refrigerating mode.
Further, the determining the target switching temperature according to the target liquid supply temperature comprises:
when the target liquid supply temperature is less than or equal to a preset liquid supply switching temperature, determining a preset temperature range corresponding to the target liquid supply temperature, wherein the preset liquid supply switching temperature is as follows: when the outdoor environment temperature is equal to the preset outdoor environment temperature, and when all the double-cold-source refrigerating devices enter a surface cooler refrigerating mode, the liquid supply temperature is higher than the preset outdoor environment temperature;
and taking the preset switching temperature corresponding to the preset temperature range as the target switching temperature.
Further, the determining the target switching temperature according to the target liquid supply temperature comprises:
when the target liquid supply temperature is higher than a preset liquid supply switching temperature, taking the preset outdoor environment temperature as the target switching temperature, wherein the preset liquid supply switching temperature is as follows: and when the outdoor environment temperature is equal to the preset outdoor environment temperature, and when all the double-cold-source refrigerating devices enter the surface cooler refrigerating mode, the liquid supply temperature is increased.
Further, the control the double-cold-source refrigerating device to enter a surface cooler refrigerating mode comprises: and controlling the double-cold-source refrigerating device to sequentially enter a surface air cooler refrigerating mode.
Further, still include:
acquiring actual liquid supply temperature in the process of controlling the double-cold-source refrigerating device to sequentially enter a surface cooler refrigerating mode;
and if the difference value between the target liquid supply temperature and the actual liquid supply temperature is larger than a first preset difference value, controlling all the double-cold-source refrigerating devices to simultaneously enter a surface air cooler refrigerating mode, wherein the first preset difference value is larger than or equal to 0.
Further, still include:
and when the outdoor environment temperature is higher than the preset outdoor environment temperature, controlling the double-cold-source refrigerating device to enter a compressor refrigerating mode.
Further, the method also comprises the following steps:
when the target liquid supply temperature is less than or equal to a preset liquid supply switching temperature, controlling the double-cold-source refrigerating device to sequentially enter a compressor refrigerating mode; the preset liquid supply switching temperature is as follows: when the outdoor environment temperature is equal to the preset outdoor environment temperature, and when all the double-cold-source refrigerating devices enter a surface cooler refrigerating mode, the liquid supply temperature is higher than the preset outdoor environment temperature;
acquiring actual liquid supply temperature in the process of controlling the double-cold-source refrigerating device to sequentially enter a compressor refrigerating mode; and if the difference value between the actual liquid supply temperature and the target liquid supply temperature is larger than a second preset difference value, controlling all the double-cold-source refrigerating devices to simultaneously enter a compressor refrigerating mode, wherein the second preset difference value is larger than or equal to 0.
Further, the method also comprises the following steps:
when the target liquid supply temperature is higher than a preset liquid supply switching temperature, controlling the double-cold-source refrigerating device to enter a compressor refrigerating mode, wherein the preset liquid supply switching temperature is as follows: and when the outdoor environment temperature is equal to the preset outdoor environment temperature and all the double-cold-source refrigerating devices enter the surface cooler refrigerating mode, the liquid supply temperature is determined.
Further, still include: and controlling an electric heating device arranged at the condenser to work and controlling a fan at the condenser to reduce the gear or the frequency of the fan.
In a second aspect, a control device for a multiple dual cold source refrigeration device unit is provided, which includes:
the temperature acquisition module is used for acquiring a target liquid supply temperature and an outdoor environment temperature;
the switching temperature determining module is used for determining the target switching temperature according to the target liquid supply temperature when the outdoor environment temperature is less than or equal to the preset outdoor environment temperature;
and the mode control module is used for controlling the double-cold-source refrigerating device to enter a surface air cooler refrigerating mode when the outdoor environment temperature is less than or equal to the target switching temperature.
In a third aspect, a multiple dual cold source refrigeration unit control system is provided, comprising:
a processor;
a memory for storing the processor-executable instructions;
the processor is configured to perform the method of any of the aspects of the first aspect.
A fourth aspect provides a multiple double-cold-source refrigerating device unit applying the method of any one of the technical schemes of the first aspect.
Has the advantages that:
the embodiment of the invention provides a method, a device and a system for controlling a unit of a multi-double-cold-source refrigerating device, and the unit, wherein a target liquid supply temperature and an outdoor environment temperature are firstly obtained, and then when the outdoor environment temperature is lower than a preset outdoor environment temperature, a target switching temperature is determined according to the target liquid supply temperature; and when the outdoor environment temperature is less than or equal to the target switching temperature, controlling the double-cold-source refrigerating device to enter a surface cooler refrigerating mode. In the scheme of the application, when the outdoor environment temperature is lower than the preset outdoor environment temperature, the outdoor environment temperature is lower, and the double-cold-source refrigerating device enters a surface air cooler refrigerating mode to enable the unit to have certain refrigerating capacity; the target liquid supply temperatures are different and indicate different requirements on the refrigerating capacity of the unit, so that the target switching temperature is determined according to the target liquid supply temperature, and when the outdoor environment temperature is less than or equal to the target switching temperature, the refrigerating device is controlled to enter a surface cooling refrigerating mode, so that the refrigerating capacity of the unit can be ensured to meet the refrigerating requirement, and the double-cold-source refrigerating device is controlled to enter a surface cooler refrigerating mode as far as possible to reduce energy consumption.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dual cold source refrigeration apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a multi-dual cold source refrigeration device unit according to an embodiment of the present invention;
fig. 3 is a flowchart of a unit control method for a multiple dual-cold-source refrigeration device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a control device of a multi-dual cold source refrigeration device unit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the technical solutions of the present invention is provided with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.
First, the structure of the dual cold source refrigeration device in the present application is described, and as shown in fig. 1, the dual cold source refrigeration device includes a compressor 1, an exhaust bulb 2, a high-pressure switch 3, a condenser 4, an expansion valve 5, a plate heat exchanger 6, a gas-liquid separator 7, a low-pressure switch 8, a heat exchanger 9, a first electromagnetic valve 10, a liquid-returning bulb 11, a second electromagnetic valve 12, and a fan 13.
When the first solenoid valve 10 is open, the second solenoid valve 12 is closed. At the moment, the refrigerating device enters a compressor refrigerating mode, heat exchange is carried out through the heat exchanger 6, and heat exchange is not carried out through the heat exchanger 9. When the first solenoid valve 10 is closed, the second solenoid valve 12 is opened. At this time, the refrigerating device enters a surface cooler refrigerating mode. The compressor does not work, and heat exchange is carried out through the heat exchanger 9.
And many two cold source refrigerating plant units that this application mentioned are shown as figure 2, including four identical two cold source refrigerating plant, and the inlet channel is all connected so that liquid and plate heat exchanger or heat exchanger carry out the heat transfer in the inlet channel to every refrigerating plant's first solenoid valve and second solenoid valve place pipeline. And the liquid after heat exchange of the plate heat exchanger or the heat exchanger is reserved to the liquid return channel through a pipeline. Each refrigerating device in the unit is independently controlled and does not influence each other. The liquid supply temperature in this application is actually the temperature of the liquid (e.g., glycol solution) in the liquid return channel.
A first embodiment, referring to fig. 3, an embodiment of the present invention provides a method for controlling a multiple dual cold source refrigeration unit, including the following steps:
s11: acquiring a target liquid supply temperature and an outdoor environment temperature;
s12: when the outdoor environment temperature is less than or equal to the preset outdoor environment temperature, determining a target switching temperature according to the target liquid supply temperature;
s13: and when the outdoor environment temperature is less than or equal to the target switching temperature, controlling the double-cold-source refrigerating device to enter a surface cooler refrigerating mode.
The control method of the multi-double-cold-source refrigerating device unit comprises the steps of firstly obtaining a target liquid supply temperature and an outdoor environment temperature, and then determining a target switching temperature according to the target liquid supply temperature when the outdoor environment temperature is lower than a preset outdoor environment temperature; and when the outdoor environment temperature is less than or equal to the target switching temperature, controlling the double-cold-source refrigerating device to enter a surface cooler refrigerating mode. In the scheme of the application, when the outdoor environment temperature is lower than the preset outdoor environment temperature, the outdoor environment temperature is lower, and the double-cold-source refrigerating device enters a surface air cooler refrigerating mode to enable the unit to have certain refrigerating capacity; the target liquid supply temperatures are different and indicate different requirements on the refrigerating capacity of the unit, so that the target switching temperature is determined according to the target liquid supply temperature, and when the outdoor environment temperature is less than or equal to the target switching temperature, the refrigerating device is controlled to enter a surface cooling refrigerating mode, so that the refrigerating capacity of the unit can be ensured to meet the refrigerating requirement, and the double-cold-source refrigerating device is controlled to enter a surface cooler refrigerating mode as far as possible to reduce energy consumption.
In a second embodiment, as an illustration of steps of the first embodiment, an embodiment of the present invention provides a method for controlling a specific multi-dual cold source refrigeration unit, including the following steps:
acquiring a target liquid supply temperature and an outdoor environment temperature; the target liquid supply temperature is set by a user and can be obtained according to a user set value, and the temperatures of different areas of the outdoor environment temperature are not necessarily the same; because under the surface cooler refrigeration mode, it is outdoor air heat transfer through the heat exchanger, in order to control accurately, outdoor ambient temperature acquires the ambient temperature of heat exchanger department as far as possible, promptly at the outdoor unit installation temperature sensor and acquire.
When the outdoor environment temperature is less than or equal to the preset outdoor environment temperature, determining a target switching temperature according to the target liquid supply temperature;
as an optional implementation manner of the embodiment of the present invention, when the target liquid supply temperature is less than or equal to the preset liquid supply switching temperature, a preset temperature range corresponding to the target liquid supply temperature is determined, where the preset liquid supply switching temperature is: when the outdoor environment temperature is equal to the preset outdoor environment temperature, and when all the double-cold-source refrigerating devices enter a surface cooler refrigerating mode, the liquid supply temperature is higher than the preset outdoor environment temperature; and taking the preset switching temperature corresponding to the preset temperature range as the target switching temperature.
It should be clear that, in the surface cooler refrigeration mode, the maximum refrigeration capacity of the dual-cold-source refrigeration device is related to the outdoor ambient temperature, and when the target liquid supply temperature is less than or equal to the preset liquid supply switching temperature, it indicates that the outdoor ambient temperature is at the preset outdoor ambient temperature, for example, 0 ℃, even if all the dual-cold-source refrigeration devices enter the surface cooler refrigeration mode, the liquid supply temperature cannot reach the target liquid supply temperature, that is, when the outdoor ambient temperature is the preset outdoor ambient temperature, the refrigeration capacities of all the dual-cold-source refrigeration devices in the unit entering the surface cooler refrigeration mode cannot meet the refrigeration requirement. Therefore, the target switching temperature when the double-cold-source refrigerating device is controlled to enter the surface cooler refrigerating mode needs to be lower than the preset outdoor environment temperature, so that the maximum refrigerating capacity of the double-cold-source refrigerating device can meet the refrigerating requirement in the surface cooler refrigerating mode.
It will be appreciated that if the target feed temperature is lower, this indicates a higher refrigeration demand, a higher demand on the refrigeration capacity of the unit; thus, the lower the target feed liquid temperature, the lower the target switching temperature. The corresponding relation between the target liquid supply temperature and the target switching temperature is preset, so that when the target liquid supply temperature is obtained, the corresponding preset switching temperature is directly used as the target switching temperature.
As another optional implementation manner of the present invention, when the target liquid supply temperature is greater than the preset liquid supply switching temperature, the preset outdoor environment temperature is taken as the target switching temperature. When the target liquid supply temperature is higher than the preset liquid supply switching temperature, the target liquid supply temperature indicates that when the outdoor environment temperature is lower than or equal to the preset outdoor environment temperature and all the double-cold-source refrigerating devices enter the surface air cooler refrigerating mode, the refrigerating capacity of the unit can meet the refrigerating requirement corresponding to the target liquid supply temperature, and therefore the refrigerating devices in the unit are directly controlled to enter the surface air cooler refrigerating mode.
And when the outdoor environment temperature is less than or equal to the target switching temperature, controlling the double-cold-source refrigerating device to enter a surface cooler refrigerating mode.
It should be noted that, when the unit is just started up and operated, in order to make the liquid supply temperature reach the target liquid supply temperature quickly, all the dual-cold-source refrigeration devices generally perform refrigeration in the compressor refrigeration mode first. However, after the unit operates for a period of time, if the outdoor environment temperature is less than or equal to the target switching temperature, the double-cold-source refrigerating device is controlled to enter the surface air cooler refrigerating mode. And because the refrigerating capacity of the unit is higher in the compressor refrigerating mode, when the double-cold-source refrigerating devices are both in the compressor refrigerating mode, if the double-cold-source refrigerating devices are controlled to simultaneously enter the surface cooler mode, the liquid supply temperature of the unit is easy to change too much, and the liquid supply temperature is influenced to quickly reach the target liquid supply temperature. Therefore, the double-cold-source refrigerating device needs to be sequentially controlled to enter the surface cooler refrigerating mode. The liquid supply temperature can quickly reach the target liquid supply temperature, and the energy consumption of the unit can be gradually reduced.
Of course, when the unit for rapidly making the liquid supply temperature reach the target liquid supply temperature is not considered, the double-cold-source refrigerating device can be directly controlled to enter the surface cooler refrigerating mode after the unit is started.
Acquiring actual liquid supply temperature in the process of controlling the double-cold-source refrigerating device to sequentially enter a surface cooler refrigerating mode; and if the difference value between the target liquid supply temperature and the actual liquid supply temperature is larger than a first preset difference value, controlling all the double-cold-source refrigerating devices to simultaneously enter a surface cooler refrigerating mode, wherein the first preset difference value is larger than or equal to 0. When the difference value between the target liquid supply temperature and the actual liquid supply temperature is larger than a first preset difference value, the actual liquid supply temperature can meet the refrigeration requirement, and at the moment, even if all the double-cold-source refrigeration devices are controlled to simultaneously enter a surface cooler refrigeration mode, the unit cannot be influenced to rapidly meet the refrigeration requirement.
As an optional implementation manner of the embodiment of the present invention, when the outdoor environment temperature is greater than the preset outdoor environment temperature, the dual cold source refrigeration device is controlled to enter the compressor refrigeration mode. The outdoor environment temperature is higher than the preset outdoor environment temperature, and when the refrigerating device enters a surface cooler refrigerating mode, the heat exchange efficiency is low, so that the liquid supply temperature of the unit quickly reaches the target liquid supply temperature, the double-cold-source refrigerating device is controlled to enter a compressor refrigerating mode.
When the target liquid supply temperature is less than or equal to the preset liquid supply switching temperature, controlling the double-cold-source refrigerating device to sequentially enter a compressor refrigerating mode; acquiring the actual liquid supply temperature in the process of controlling the double-cold-source refrigerating device to sequentially enter a compressor refrigerating mode; and if the difference value between the actual liquid supply temperature and the target liquid supply temperature is larger than a second preset difference value, controlling all the double-cold-source refrigerating devices to simultaneously enter a compressor refrigerating mode, wherein the second preset difference value is larger than or equal to 0. When the target liquid supply temperature is less than or equal to the preset liquid supply switching temperature, it is indicated that even if all the double-cold-source refrigerating devices enter the surface air cooler refrigerating mode, the refrigerating capacity of the unit cannot meet the refrigerating requirement, and therefore the compressor needs to be turned on for refrigerating at the moment. And the sequential control to enter the compressor cooling mode is because only a part of the dual cooling source cooling device may be turned on without turning all of it on. It can be understood that when the difference between the actual liquid supply temperature and the target liquid supply temperature is greater than the second preset difference, it indicates that the difference between the actual liquid supply temperature and the target liquid supply temperature is relatively large, and in order to quickly make the actual liquid supply temperature reach the target liquid supply temperature, accelerate the refrigeration effect, and control all the dual-cold-source refrigeration devices to simultaneously enter the compressor refrigeration mode.
And when the target liquid supply temperature is higher than the preset liquid supply switching temperature, controlling the double-cold-source refrigerating device to enter a compressor refrigerating mode. At this time, because the outdoor environment temperature is greater than the preset outdoor environment temperature, even if the target liquid supply temperature is greater than the preset liquid supply switching temperature, the refrigerating capacity of the unit can not meet the refrigerating requirement when all the double-cold-source refrigerating devices enter the surface air cooler refrigerating mode. Therefore, the dual cold source refrigeration device needs to be controlled to enter the compressor refrigeration mode first. In order to prevent the double cold source refrigeration device from stopping due to low-pressure protection when entering a compressor refrigeration mode, the double cold source refrigeration device also comprises: and controlling an electric heating device arranged at the condenser to work so as to improve the temperature of the inlet air. And the fan at the condenser is controlled to reduce the gear or the frequency of the fan so as to reduce the condensation air quantity.
It should be noted that, in the case that the embodiments of the present invention cannot summarize all cases, in the case that the above embodiments do not appear, a person skilled in the art may set a control scheme according to his own needs, for example, keeping the control scheme at the previous time unchanged. The embodiments of the present invention are not limited.
In addition, the start-stop control method of the multiple double-cold-source refrigerating devices in the embodiment of the invention comprises the following steps:
and starting and stopping the double-cold-source refrigerating devices according to a preset sequence, then starting and stopping the double-cold-source refrigerating devices according to the accumulated running time, stopping the double-cold-source refrigerating devices firstly when the accumulated running time is longest, and starting the double-cold-source refrigerating devices firstly when the accumulated running time is shortest. The running time is the same and is started or closed according to the preset sequence.
According to the specific control method of the multi-double-cold-source refrigerating unit, when the outdoor environment temperature is lower than the preset outdoor environment temperature, the outdoor environment temperature is lower, and the double-cold-source refrigerating unit enters a surface cooler refrigerating mode to enable the unit to have certain refrigerating capacity; the target liquid supply temperatures are different and indicate different requirements on the refrigerating capacity of the unit, so that the target switching temperature is determined according to the target liquid supply temperature, and when the outdoor environment temperature is less than or equal to the target switching temperature, the refrigerating device is controlled to enter a surface cooling refrigerating mode, so that the refrigerating capacity of the unit can be ensured to meet the refrigerating requirement, and the double-cold-source refrigerating device is controlled to enter a surface cooler refrigerating mode as far as possible to reduce energy consumption.
In a third embodiment, the present invention provides a control device for a multiple dual cold source refrigeration unit, as shown in fig. 4, including:
a temperature obtaining module 41, configured to obtain a target liquid supply temperature and an outdoor environment temperature;
a switching temperature determination module 42, configured to determine a target switching temperature according to the target liquid supply temperature when the outdoor environment temperature is less than or equal to a preset outdoor environment temperature; specifically, when the target liquid supply temperature is less than or equal to the preset liquid supply switching temperature, the switching temperature determining module 42 determines a preset temperature range corresponding to the target liquid supply temperature, where the preset liquid supply switching temperature is: when the outdoor environment temperature is equal to the preset outdoor environment temperature, and when all the double-cold-source refrigerating devices enter the surface cooler refrigerating mode, the liquid supply temperature is higher than the preset outdoor environment temperature; and taking the preset switching temperature corresponding to the preset temperature range as the target switching temperature.
When the target supply liquid temperature is greater than the preset supply liquid switching temperature, the switching temperature determination module 42 takes the preset outdoor ambient temperature as the target switching temperature.
And the mode control module 43 is used for controlling the double-cold-source refrigerating device to enter the surface cooler refrigerating mode when the outdoor environment temperature is less than or equal to the target switching temperature. Specifically, the mode control module 43 controls the dual-cold-source refrigeration device to sequentially enter the surface cooler refrigeration mode. Further comprising: acquiring actual liquid supply temperature in the process of controlling the double-cold-source refrigerating device to sequentially enter a surface cooler refrigerating mode; and if the difference value between the target liquid supply temperature and the actual liquid supply temperature is larger than a first preset difference value, controlling all the double-cold-source refrigerating devices to simultaneously enter a surface cooler refrigerating mode, wherein the first preset difference value is larger than or equal to 0.
In addition, when the outdoor ambient temperature is greater than the preset outdoor ambient temperature, the mode control module 43 controls the dual cold source cooling device to enter the compressor cooling mode. In particular, the amount of the solvent to be used,
when the target liquid supply temperature is less than or equal to the preset liquid supply switching temperature, the mode control module 43 controls the dual-cold-source refrigeration device to sequentially enter a compressor refrigeration mode; acquiring actual liquid supply temperature in the process of controlling the double-cold-source refrigerating device to sequentially enter a compressor refrigerating mode; and if the difference value between the actual liquid supply temperature and the target liquid supply temperature is larger than a second preset difference value, controlling all the double-cold-source refrigerating devices to simultaneously enter a compressor refrigerating mode, wherein the second preset difference value is larger than or equal to 0.
When the target liquid supply temperature is greater than the preset liquid supply switching temperature, the mode control module 43 controls the dual cold source refrigeration device to enter a compressor refrigeration mode. The mode control module 43 is further configured to control an electric heating device disposed at the condenser to operate and control a fan at the condenser to lower a gear or a fan frequency.
According to the control device of the multi-double-cold-source refrigerating device unit, the temperature obtaining module obtains the target liquid supply temperature and the outdoor environment temperature; when the outdoor environment temperature is less than or equal to the preset outdoor environment temperature, the switching temperature determining module determines a target switching temperature according to the target liquid supply temperature; and when the outdoor environment temperature is less than or equal to the target switching temperature, the mode control module controls the double-cold-source refrigerating device to enter a surface air cooler refrigerating mode. The control device provided by the embodiment of the invention firstly obtains the target liquid supply temperature and the outdoor environment temperature, and then determines the target switching temperature according to the target liquid supply temperature when the outdoor environment temperature is lower than the preset outdoor environment temperature; and when the outdoor environment temperature is less than or equal to the target switching temperature, controlling the double-cold-source refrigerating device to enter a surface cooler refrigerating mode. In the scheme of the application, when the outdoor environment temperature is lower than the preset outdoor environment temperature, the outdoor environment temperature is lower, and the double-cold-source refrigerating device enters a surface air cooler refrigerating mode to enable the unit to have certain refrigerating capacity; and different target liquid supply temperatures indicate different requirements on the refrigerating capacity of the unit, so that the target switching temperature is determined according to the target liquid supply temperature, and when the outdoor environment temperature is less than or equal to the target switching temperature, the refrigerating device is controlled to enter a surface cooling refrigerating mode, so that the refrigerating capacity of the unit can be ensured to meet the refrigerating requirement, and the double-cold-source refrigerating device is controlled to enter a surface cooler refrigerating mode as far as possible to reduce energy consumption.
In a fourth embodiment, the present invention provides a multiple dual cold source refrigeration unit control system, comprising:
a processor;
a memory for storing processor-executable instructions;
the processor is configured to execute the multi-dual cold source refrigerating unit control method provided in the first embodiment or the second embodiment.
The embodiment of the invention provides a control system, which stores an executable instruction of a processor through a memory, can acquire a target liquid supply temperature and an outdoor environment temperature when the processor executes the executable instruction, and then determines a target switching temperature according to the target liquid supply temperature when the outdoor environment temperature is lower than a preset outdoor environment temperature; and when the outdoor environment temperature is less than or equal to the target switching temperature, controlling the double-cold-source refrigerating device to enter a surface cooler refrigerating mode. In the scheme of the application, when the outdoor environment temperature is lower than the preset outdoor environment temperature, the outdoor environment temperature is lower, and the double-cold-source refrigerating device enters a surface air cooler refrigerating mode to enable the unit to have certain refrigerating capacity; the target liquid supply temperatures are different and indicate different requirements on the refrigerating capacity of the unit, so that the target switching temperature is determined according to the target liquid supply temperature, and when the outdoor environment temperature is less than or equal to the target switching temperature, the refrigerating device is controlled to enter a surface cooling refrigerating mode, so that the refrigerating capacity of the unit can be ensured to meet the refrigerating requirement, and the double-cold-source refrigerating device is controlled to enter a surface cooler refrigerating mode as far as possible to reduce energy consumption.
In a fifth embodiment, the present invention provides a multiple dual-cold-source refrigeration device unit, and the multiple dual-cold-source refrigeration device unit control method provided in the first embodiment or the second embodiment is applied
The unit provided by the embodiment of the invention firstly obtains the target liquid supply temperature and the outdoor environment temperature, and then determines the target switching temperature according to the target liquid supply temperature when the outdoor environment temperature is lower than the preset outdoor environment temperature; and when the outdoor environment temperature is less than or equal to the target switching temperature, controlling the double-cold-source refrigerating device to enter a surface cooler refrigerating mode. In the scheme of the application, when the outdoor environment temperature is lower than the preset outdoor environment temperature, the outdoor environment temperature is lower, and the double-cold-source refrigerating device enters a surface air cooler refrigerating mode to enable the unit to have certain refrigerating capacity; the target liquid supply temperatures are different and indicate different requirements on the refrigerating capacity of the unit, so that the target switching temperature is determined according to the target liquid supply temperature, and when the outdoor environment temperature is less than or equal to the target switching temperature, the refrigerating device is controlled to enter a surface cooling refrigerating mode, so that the refrigerating capacity of the unit can be ensured to meet the refrigerating requirement, and the double-cold-source refrigerating device is controlled to enter a surface cooler refrigerating mode as far as possible to reduce energy consumption.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (12)
1. A control method for a multi-double-cold-source refrigerating device unit is characterized by comprising the following steps:
acquiring a target liquid supply temperature and an outdoor environment temperature;
when the outdoor environment temperature is less than or equal to a preset outdoor environment temperature, determining the target switching temperature according to the target liquid supply temperature;
and when the outdoor environment temperature is less than or equal to the target switching temperature, controlling the double-cold-source refrigerating device to enter a surface air cooler refrigerating mode.
2. The method of claim 1, wherein: the determining the target switching temperature according to the target liquid supply temperature comprises:
when the target liquid supply temperature is less than or equal to a preset liquid supply switching temperature, determining a preset temperature range corresponding to the target liquid supply temperature, wherein the preset liquid supply switching temperature is as follows: when the outdoor environment temperature is equal to the preset outdoor environment temperature, and when all the double-cold-source refrigerating devices enter a surface cooler refrigerating mode, the liquid supply temperature is higher than the preset outdoor environment temperature;
and taking the preset switching temperature corresponding to the preset temperature range as the target switching temperature.
3. The method of claim 1, wherein: the determining the target switching temperature according to the target liquid supply temperature comprises:
when the target liquid supply temperature is higher than a preset liquid supply switching temperature, taking the preset outdoor environment temperature as the target switching temperature, wherein the preset liquid supply switching temperature is as follows: and when the outdoor environment temperature is equal to the preset outdoor environment temperature and all the double-cold-source refrigerating devices enter a surface cooler refrigerating mode, the liquid supply temperature is determined.
4. The method of claim 1, wherein: the control two cold source refrigerating plant get into surface cooler refrigeration mode, include: and controlling the double-cold-source refrigerating device to sequentially enter a surface air cooler refrigerating mode.
5. The method of claim 4, further comprising:
acquiring the actual liquid supply temperature in the process of controlling the double-cold-source refrigerating device to sequentially enter a surface cooler refrigerating mode;
and if the difference value between the target liquid supply temperature and the actual liquid supply temperature is larger than a first preset difference value, controlling all the double-cold-source refrigerating devices to simultaneously enter a surface cooler refrigerating mode, wherein the first preset difference value is larger than or equal to 0.
6. The method of claim 1, further comprising:
and when the outdoor environment temperature is higher than the preset outdoor environment temperature, controlling the double-cold-source refrigerating device to enter a compressor refrigerating mode.
7. The method of claim 6, wherein:
when the target liquid supply temperature is less than or equal to a preset liquid supply switching temperature, controlling the double-cold-source refrigerating device to sequentially enter a compressor refrigerating mode; the preset liquid supply switching temperature is as follows: when the outdoor environment temperature is equal to the preset outdoor environment temperature, and when all the double-cold-source refrigerating devices enter a surface cooler refrigerating mode, the liquid supply temperature is higher than the preset outdoor environment temperature;
acquiring actual liquid supply temperature in the process of controlling the double-cold-source refrigerating device to sequentially enter a compressor refrigerating mode; and if the difference value between the actual liquid supply temperature and the target liquid supply temperature is larger than a second preset difference value, controlling all the double-cold-source refrigerating devices to simultaneously enter a compressor refrigerating mode, wherein the second preset difference value is larger than or equal to 0.
8. The method of claim 6, further comprising:
when the target liquid supply temperature is higher than a preset liquid supply switching temperature, controlling the double-cold-source refrigerating device to enter a compressor refrigerating mode, wherein the preset liquid supply switching temperature is as follows: and when the outdoor environment temperature is equal to the preset outdoor environment temperature, and when all the double-cold-source refrigerating devices enter the surface cooler refrigerating mode, the liquid supply temperature is increased.
9. The method of claim 8, further comprising: and controlling an electric heating device arranged at the condenser to work and controlling a fan at the condenser to reduce the gear or the frequency of the fan.
10. A multi-double-cold-source refrigerating device unit control device is characterized by comprising:
the temperature acquisition module is used for acquiring a target liquid supply temperature and an outdoor environment temperature;
the switching temperature determining module is used for determining the target switching temperature according to the target liquid supply temperature when the outdoor environment temperature is less than or equal to a preset outdoor environment temperature;
and the mode control module is used for controlling the double-cold-source refrigerating device to enter a surface air cooler refrigerating mode when the outdoor environment temperature is less than or equal to the target switching temperature.
11. A multi-dual cold source refrigeration unit control system, comprising:
a processor;
a memory for storing the processor-executable instructions;
the processor is configured to perform the method of any one of claims 1-9.
12. A multiple dual cold source refrigeration unit wherein the method of any one of claims 1 to 9 is applied.
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