CN111271904B - Regional defrosting method for air-cooled modular unit - Google Patents
Regional defrosting method for air-cooled modular unit Download PDFInfo
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- CN111271904B CN111271904B CN202010129304.3A CN202010129304A CN111271904B CN 111271904 B CN111271904 B CN 111271904B CN 202010129304 A CN202010129304 A CN 202010129304A CN 111271904 B CN111271904 B CN 111271904B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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Abstract
A defrosting method for an area of an air cooling module unit comprises the following steps: the method for defrosting the air-cooled module unit region comprises the following steps of dividing a plurality of modules of the air-cooled module unit into at least two regions, and dividing a plurality of modules in each region of the at least two regions into at least two groups, wherein for each region, the method for defrosting the air-cooled module unit region comprises the following steps: any slave controller in any group receives a defrost signal and sends the defrost signal to a master controller in the any group; and the master controller in any group sends the defrosting signal to the rest slave controllers in any group to enable the modules in any group to enter a defrosting mode. The method reduces the influence on the modules around the module which is defrosting, and improves the heat supply capacity and the energy efficiency ratio of the air cooling module unit.
Description
Technical Field
The invention relates to the technical field of heat exchange, in particular to a method for defrosting an area of an air cooling module unit.
Background
When the air-cooled module heat pump unit operates in a winter heating mode, the fin heat exchanger serves as an evaporator of the heat pump unit to absorb low-grade heat from air, then the heat pump unit applies work through the compressor, consumes a small amount of electric energy to convert the electric energy into a high-grade heat source, and supplies the high-grade heat source to a user side for use. The surface temperature of the fins of the unit is low in the heating mode, and when the surface temperature is lower than the dew point temperature of the ambient air and lower than the triple point temperature of water, namely 0 ℃, water vapor in the air is condensed on the surface of the fins in a solid state, so that the frosting phenomenon occurs.
As shown in fig. 3, the air cooling module units are usually arranged closer to each other and in a larger number. When a module a meets the defrost condition, the module a enters the defrost mode, but the next module B, C does not meet the defrost condition, and the module B, C is operating in the heating mode. However, a large amount of water vapor generated during defrosting of module a is adsorbed to the fin surface of module B, C to form a thick frost layer, and then module B, C soon satisfies the defrosting condition and enters the defrosting mode. At this time, module a has just been switched to the heating mode, and modules D, E, F and the like around modules B and C do not satisfy the defrosting condition, and are also operating in the heating mode, however, a large amount of moisture generated when modules B and C defrost is adsorbed to the surfaces of the fins by module A, D, E, F and the like to form a thick frost layer, and module A, D, E, F and the like therefore satisfy the defrosting condition quickly and enter the defrosting mode. In cycles, the air-cooled modular units in the area are subjected to unit defrosting frequently, so that the equipment is low in energy efficiency and poor in heating effect. How to solve the practical application problem is the direction in which system engineers are continuously pursuing efforts.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a method for defrosting an area of an air cooling module unit.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a method for defrosting an area of an air cooling module unit, which comprises the following steps:
dividing a number of modules of the air-cooled modular unit into at least two zones, dividing a number of modules in each of the at least two zones into at least two groups,
wherein, for each zone, the method for defrosting the air-cooled module unit zone comprises the following steps:
any slave controller in any group receives a defrost signal and sends the defrost signal to a master controller in the any group;
and the master controller in any group sends the defrosting signal to the rest slave controllers in any group to enable the modules in any group to enter a defrosting mode.
Further, the air conditioner is provided with a fan,
reading the defrosting signal of the main controller in any group by the slave cloud module corresponding to the any group, and sending the defrosting signal to the main cloud modules in the rest groups;
the master cloud modules in the other groups send the defrosting signals to the slave cloud modules in the other groups and to the master controllers corresponding to the master cloud modules in the other groups, and the master controllers corresponding to the master cloud modules in the other groups send the defrosting signals to the slave controllers corresponding to the master cloud modules in the other groups;
the slave cloud modules in the other groups send the defrosting signals to the master controllers corresponding to the slave cloud modules in the other groups;
and the master controller corresponding to the slave cloud modules in the rest groups sends the defrosting signal to the slave controller corresponding to the master controller, so that the modules in the rest groups enter a defrosting mode.
Further, before the modules in any group are put into the defrosting mode, the method also comprises the following steps:
if there are modules within any of the groups that do not meet the defrost condition, then it is shut down.
And further, after defrosting is finished, loading the modules which do not meet defrosting conditions in any group.
Further, the method also comprises the following steps:
if defrosting of a module within the any group is complete, but other modules within the any group are still in defrost mode, then the module within the any group is shut down.
Further, after defrosting is finished, the certain module in any group is loaded.
Further, the method also comprises the following steps:
and if the modules which do not meet the defrosting condition exist in the rest groups, stopping the modules.
And further, after defrosting is finished, loading the modules which do not meet defrosting conditions in the rest groups.
Further, the method also comprises the following steps:
and if the defrosting of a certain module in the rest groups is finished, but other modules in the rest groups are still in the defrosting mode, stopping the certain module in the rest groups.
And further, after defrosting is finished, loading the certain module in the rest groups.
Compared with the prior art, the invention has the beneficial technical effects that: according to the invention, the plurality of modules of the air cooling module unit are divided into different areas according to the position of the air cooling module unit, and the modules in each area are divided into different groups, so that the technical problem that one module is defrosted due to a short arrangement distance of the air cooling module unit, so that other modules are influenced, and finally all modules are defrosted frequently is solved. The method reduces the influence on the modules around the module which is defrosting, and improves the heat supply capacity and the energy efficiency ratio of the air cooling module unit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for defrosting an area of an air-cooled modular unit according to the present invention;
FIG. 2 is another schematic flow chart of the defrosting method for the air cooling module unit area according to the present invention;
FIG. 3 is a layout view of the air-cooled modular unit of the present invention;
fig. 4 is a control schematic diagram of regional defrosting of the air-cooled modular unit of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the present invention provides a method for defrosting an area of an air-cooled modular unit, comprising the following steps:
s101: a plurality of modules of the air cooling module unit are divided into at least two areas, and a plurality of modules in each area of the at least two areas are divided into at least two groups.
As shown in fig. 3, the air-cooling module group of a certain heating cell includes 64 modules, and the 64 modules of the air-cooling module group are divided into four zones, i.e., a zone M, a zone N, a zone O, and a zone P. Each zone contains 16 modules, and the 16 modules in each zone are divided into four groups, namely group 1, group 2, group 3 and group 4, each group containing 4 modules.
As shown in fig. 4, the controllers of each module in each group communicate in a cascade connection manner, one controller in each group is a master controller, and the rest are slave controllers. Each group is connected with one corresponding cloud module through RS485 communication, and the cloud modules are connected through RS485 communication. And setting the cloud module of one of the four groups as a master cloud module, and setting the cloud modules of the other groups as slave cloud modules. And between each group and the corresponding cloud module, the main controller is a slave station, and the corresponding cloud module is a master station.
The defrosting method for the air cooling module unit area comprises the following steps:
taking group 1 in the area M as an example, it is assumed that the cloud module corresponding to group 1 is the master cloud module, and the cloud modules corresponding to the other groups, i.e., group 2, group 3, and group 4, are the slave cloud modules, respectively. The controller of the module 1-1 in the group 1 is a master controller 1-1-1, and the controllers of the other modules, i.e., the modules 1-2, 1-3 and 1-4, are slave controllers 1-2-2, 1-3-3 and 1-4-4, respectively.
S102: any slave controller within any group receives the defrost signal and sends the defrost signal to the master controller within any group.
The slave controllers 1-2-2 within group 1 receive the defrost signal and send the defrost signal to the master controllers 1-1-1 within group 1.
S103: the master controller in any group sends a defrost signal to the remaining slave controllers in any group to cause the modules in any group to enter a defrost mode.
The master controller 1-1-1 within group 1 sends a defrost signal to the remaining slave controllers 1-3-3 and 1-4-4 within group 1 causing the various modules within group 1 (i.e., module 1-1, module 1-2, module 1-3, and module 1-4) to enter defrost mode.
Further, before the step S103 of putting the modules in the group 1 into the defrosting mode, the method further includes the following steps:
if there are modules within any group that do not meet the defrost condition, then it is shut down. Then, after defrosting is finished, modules which do not meet defrosting conditions in any group are loaded.
For example, if the modules 1 to 3 in the group 1 do not meet the defrosting condition, the modules 1 to 3 are shut down, and after the defrosting of the rest modules is finished, the modules 1 to 3 are loaded according to the unit energy level loading program.
Further, if defrosting of a module within any group is complete, but other modules within any group are still in defrost mode, then the module within any group is shut down. And after defrosting is finished, loading a certain module in any group.
For example, if the defrosting of module 1-4 in group 1 is complete, but the other modules 1-1 and 1-2 in group 1 are still in defrost mode, then module 1-4 is shut down. And after defrosting of other modules 1-1 and 1-2 is finished, loading the modules 1-4 according to a unit energy level loading program.
Example 2
As shown in fig. 1 and 2, the present invention provides a method for defrosting an area of an air-cooled modular unit, comprising the steps of:
s101: a plurality of modules of the air cooling module unit are divided into at least two areas, and a plurality of modules in each area of the at least two areas are divided into at least two groups.
As shown in fig. 3, the air-cooling module group of a certain heating cell includes 64 modules, and the 64 modules of the air-cooling module group are divided into four zones, i.e., a zone M, a zone N, a zone O, and a zone P. Each zone contains 16 modules, and the 16 modules in each zone are divided into four groups, namely group 1, group 2, group 3 and group 4, each group containing 4 modules.
As shown in fig. 4, the controllers of each module in each group communicate in a cascade connection manner, one controller in each group is a master controller, and the rest are slave controllers. Each group is connected with one corresponding cloud module through RS485 communication, and the cloud modules are connected through RS485 communication. And setting the cloud module of one of the four groups as a master cloud module, and setting the cloud modules of the other groups as slave cloud modules. And between each group and the corresponding cloud module, the main controller is a slave station, and the corresponding cloud module is a master station.
The defrosting method for the air cooling module unit area comprises the following steps:
taking group 1, group 2, and group 3 in the area M as an example, it is assumed that the cloud module corresponding to group 1 is the master cloud module, and the cloud modules corresponding to the other groups, i.e., group 2, group 3, and group 4, are slave cloud modules, respectively. The controller of the module 2-1 in the group 2 is a master controller 2-1-1, and the controllers of the other modules, i.e., the module 2-2, the module 2-3, and the module 2-4, are slave controllers 2-2-2, 2-3-3, and 2-4-4, respectively.
S102: any slave controller within any group receives the defrost signal and sends the defrost signal to the master controller within any group.
The slave controllers 2-2-2 within group 2 receive the defrost signal and send the defrost signal to the master controllers 2-1-1 within group 2.
S103: the master controller in any group sends a defrost signal to the remaining slave controllers in any group to cause the modules in any group to enter a defrost mode.
The master controller 2-1-1 in group 2 sends a defrost signal to the remaining slave controllers 2-3-3 and 2-4-4 in group 2 causing the various modules in group 2 (i.e., module 2-1, module 2-2, module 2-3, and module 2-4) to enter defrost mode.
S104: the slave cloud module corresponding to any one group reads a defrost signal of the master controller within any one group and transmits the defrost signal to the master cloud modules in the remaining groups.
The slave cloud module corresponding to the group 2 reads the defrost signal of the master controller 2-1-1 within the group 2 and transmits the defrost signal to the master cloud modules in the remaining groups (group 1, group 3, and group 4), i.e., to the master cloud module corresponding to the group 1.
S105: and the master cloud modules in the other groups send the defrosting signals to the slave cloud modules in the other groups and the master controllers corresponding to the master cloud modules in the other groups, and the master controllers corresponding to the master cloud modules in the other groups send the defrosting signals to the slave controllers corresponding to the master cloud modules in the other groups.
The master cloud module corresponding to the group 1 transmits the defrosting signal to the slave cloud modules in the remaining groups (the slave cloud modules corresponding to the groups 3 and 4), and meanwhile, the master cloud module corresponding to the group 1 transmits the defrosting signal to the master controller in the group 1, and the master controller in the group 1 transmits the defrosting signal to the slave controllers in the group 1.
S106: and the slave cloud modules in the rest groups send defrosting signals to the master controllers corresponding to the slave cloud modules in the rest groups.
Among the remaining groups (i.e., group 1, group 3, and group 4), group 3 and group 4 correspond to cloud modules, and thus, the slave cloud modules of group 3 and group 4 transmit the defrost signal to the master controller corresponding to group 3 and group 4.
S107: and the master controllers corresponding to the slave cloud modules in the other groups send the defrosting signals to the slave controllers corresponding to the master controllers, so that the modules in the other groups enter a defrosting mode.
The master controllers of groups 3 and 4 send defrost signals to all slave controllers in groups 3 and 4, respectively, causing each module in groups 1, 3, and 4 to enter defrost mode.
Further, before the step S107 of putting the modules in the remaining groups (group 1, group 3, and group 4) into the defrosting mode, the method further includes the following steps:
if there are modules in the remaining groups that do not meet the defrost condition, they are shut down. And after defrosting is finished, loading the modules which do not meet defrosting conditions in the other groups.
For example, if the module 3-1 in the group 3 does not meet the defrosting condition, the module 3-1 is shut down, and after the defrosting of the rest modules is finished, the module 3-1 is loaded according to a unit energy level loading program.
Further, if the defrosting of a module in the remaining group is finished, but other modules in the remaining group are still in the defrosting mode, the module in the remaining group is stopped. And after defrosting is finished, loading a certain module in the rest groups.
For example, if the defrosting of module 3-2 in bank 3 is complete, but the other modules 3-3 and 3-4 in bank 3 are still in defrost mode, then module 3-2 is shut down. And after defrosting of other modules 3-3 and 3-4 is finished, loading the module 3-2 according to a unit energy level loading program.
Generally, the defrosting method of the invention is mainly divided into intra-group defrosting and inter-group defrosting:
first, in-group defrost
Firstly, setting 4 modules as a group, wherein one controller 1 in the group is a master controller, and the rest are slave controllers;
secondly, if any unit in the group needs defrosting, the unit controller sends a signal to a main controller through a cascade interface, and the main controller sends a defrosting signal to controllers of all modules in the group to perform defrosting operation;
and thirdly, if a certain module does not meet the defrosting condition, stopping the module, and after defrosting of other modules is finished, loading according to a unit energy level loading program.
Second, defrosting between groups
Firstly, a cloud module of one of 4 groups is set as a master cloud module, and cloud modules of the other groups are set as slave cloud modules;
between each group and the corresponding cloud module, the master controller is a slave station, and the corresponding cloud module is a master station;
collecting defrosting signals:
any module in the group needs defrosting, the module controller sends a signal to the main controller through the cascade interface, the main controller sends a defrosting signal to the controllers of all the modules in the group, the cloud module periodically reads parameters of the controllers and is used for platform monitoring, the cloud module preferentially reads the defrosting signal of the main controller, and after the cloud module receives the defrosting signal, the defrosting signal is immediately sent to the main cloud module.
Fourthly, sending a defrosting signal:
after receiving the defrosting signal, the master cloud module sends the defrosting signal to other slave cloud modules, each slave cloud module sends the defrosting signal to the corresponding master controller, and the master controller sends the defrosting signal to other slave controllers, so that the modules in each group are controlled to defrost simultaneously;
if a certain module among the groups does not meet the defrosting condition, stopping the module, and after defrosting of the other modules is finished, loading according to a unit energy level loading program;
and stopping the module if the defrosting of a certain module among the groups is finished and other modules are still defrosting, and loading according to the unit energy level loading program after the defrosting of other modules is finished.
The above is an exemplary embodiment of the present disclosure, and the order of disclosure of the above embodiment of the present disclosure is only for description and does not represent the merits of the embodiment. It should be noted that the discussion of any embodiment above is exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to those examples, and that various changes and modifications may be made without departing from the scope, as defined in the claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. Furthermore, although elements of the disclosed embodiments of the invention may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to these examples; within the idea of an embodiment of the invention, also technical features in the above embodiment or in different embodiments may be combined and there are many other variations of the different aspects of an embodiment of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present invention are intended to be included within the scope of the embodiments of the present invention.
Claims (8)
1. A defrosting method for an air cooling module unit area is characterized by comprising the following steps:
dividing a number of modules of the air-cooled modular unit into at least two zones, dividing a number of modules in each of the at least two zones into at least two groups,
wherein, for each zone, the method for defrosting the air-cooled module unit zone comprises the following steps:
any slave controller in any group receives a defrost signal and sends the defrost signal to a master controller in the any group;
the master controller in any group sends the defrosting signal to the rest slave controllers in any group to enable the modules in any group to enter a defrosting mode;
wherein, before the modules in any one group are put into the defrosting mode, if a module which does not meet the defrosting condition exists in any one group, the module is stopped.
2. The method of claim 1,
reading the defrosting signal of the main controller in any group by the slave cloud module corresponding to the any group, and sending the defrosting signal to the main cloud modules in the rest groups;
the master cloud modules in the other groups send the defrosting signals to the slave cloud modules in the other groups and to the master controllers corresponding to the master cloud modules in the other groups, and the master controllers corresponding to the master cloud modules in the other groups send the defrosting signals to the slave controllers corresponding to the master cloud modules in the other groups;
the slave cloud modules in the other groups send the defrosting signals to the master controllers corresponding to the slave cloud modules in the other groups;
the master controller corresponding to the slave cloud modules in the rest groups sends the defrosting signals to the slave controllers corresponding to the master controller, so that the modules in the rest groups enter a defrosting mode;
and if the modules which do not meet the defrosting condition exist in the rest groups, stopping the modules.
3. The method of claim 1, wherein modules within any of the groups that do not meet the defrost condition are loaded after defrost is complete.
4. The method of claim 1, further comprising the steps of:
if defrosting of a module within the any group is complete, but other modules within the any group are still in defrost mode, then the module within the any group is shut down.
5. The method of claim 4, wherein said certain module within said any group is loaded after defrosting is complete.
6. The method of claim 2, wherein after defrosting is complete, modules in the remaining groups that do not meet the defrost condition are loaded.
7. The method of claim 2, further comprising the steps of:
and if the defrosting of a certain module in the rest groups is finished, but other modules in the rest groups are still in the defrosting mode, stopping the certain module in the rest groups.
8. The method of claim 7, wherein said certain module in said remaining group is loaded after defrosting is complete.
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| CN110645627A (en) * | 2019-10-28 | 2020-01-03 | 华北电力大学 | Air energy self-adaptive heat pump |
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| TWI428550B (en) * | 2011-07-13 | 2014-03-01 | ||
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| CN102853502A (en) * | 2012-09-29 | 2013-01-02 | 广东美的制冷设备有限公司 | Defrosting control method of heat pump air conditioner unit |
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| CN110645627A (en) * | 2019-10-28 | 2020-01-03 | 华北电力大学 | Air energy self-adaptive heat pump |
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