CN112665121B - Control method and device for air conditioner chilled water pump, controller and air conditioning system - Google Patents
Control method and device for air conditioner chilled water pump, controller and air conditioning system Download PDFInfo
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- CN112665121B CN112665121B CN202011432457.1A CN202011432457A CN112665121B CN 112665121 B CN112665121 B CN 112665121B CN 202011432457 A CN202011432457 A CN 202011432457A CN 112665121 B CN112665121 B CN 112665121B
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- 238000004378 air conditioning Methods 0.000 title claims abstract 13
- 238000000034 method Methods 0.000 title claims abstract 13
- 230000008014 freezing Effects 0.000 claims abstract 67
- 238000007710 freezing Methods 0.000 claims abstract 67
- 239000008400 supply water Substances 0.000 claims 4
- 238000005057 refrigeration Methods 0.000 claims 1
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Abstract
The invention relates to a control method, a device and a controller of an air-conditioning chilled water pump and an air-conditioning system, wherein the control method of the air-conditioning chilled water pump comprises the following steps: when the freezing water pump operates, acquiring the working state of the compressor, the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe; determining the working frequency of the chilled water pump according to the working state of the compressor and the relationship between the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe; and controlling the chilled water pump to operate according to the working frequency. The control method comprehensively controls the working frequency of the freezing water pump according to the working state of the compressor, the water supply temperature of the freezing main pipe and the temperature difference of the water supply and return of the freezing main pipe, so that the freezing water pump runs at the most appropriate frequency, the running efficiency of the freezing water pump is improved, and the whole air conditioning system is more energy-saving.
Description
Technical Field
The invention relates to the technical field of air conditioner control, in particular to a control method and device of an air conditioner chilled water pump, a controller and an air conditioner system.
Background
The existing general or commercial air conditioning system refrigerating water pump generally operates according to fixed frequency power, however, in actual use, residential and building refrigeration and air conditioning loads can change along with external weather conditions, the actual heat load of air conditioning equipment is much lower than the theoretical load in most of time, the frequency of the general refrigerating water pump is determined according to the temperature difference value of supply water and return water of a refrigerating main pipe, and the influence caused by the supply water temperature of the refrigerating main pipe is not considered. Meanwhile, the frequency increasing setting and the frequency reducing setting of the chilled water pump are not different, so that the chilled water pump cannot run at the most proper frequency, and the energy transmitted by the running of the chilled water pump is wasted.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for controlling an air conditioner chilled water pump, a controller and an air conditioning system.
In order to achieve the purpose, the invention adopts the following technical scheme: a control method of an air conditioner chilled water pump comprises the following steps:
when the freezing water pump operates, acquiring the working state of the compressor, the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe;
determining the working frequency of the chilled water pump according to the working state of the compressor and the relationship between the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe;
and controlling the chilled water pump to operate according to the working frequency.
Optionally, the determining the operating frequency of the chilled water pump according to the operating state of the compressor and the relationship between the supply water temperature of the freezing main pipe and the set water temperature of the freezing main pipe includes: when the working states of all the compressors of the air conditioning unit are closed,
if the temperature of the water supplied by the freezing main pipe is greater than or equal to the sum of the set value of the temperature of the water discharged by the freezing main pipe and the first preset temperature value, increasing the working frequency of the freezing water pump by the first preset frequency value at certain intervals until the working frequency is increased to the upper limit frequency value;
if the temperature of the water supplied by the freezing main pipe is less than or equal to the sum of the set value of the temperature of the water discharged by the freezing main pipe and the second preset temperature value, the working frequency of the freezing water pump is reduced by the second preset frequency value at certain time intervals until the working frequency is reduced to the lower limit frequency value.
Optionally, the method further includes: acquiring the temperature difference of supply water and return water of a freezing main pipe;
the method for determining the working frequency of the chilled water pump according to the working state of the compressor and the relationship between the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe comprises the following steps: when the working state of any compressor of the air conditioning unit is starting, in a continuous specific time,
if the water supply temperature of the freezing main pipe is always greater than or equal to the sum of the water outlet temperature set value of the freezing main pipe and a first temperature preset value, or if the water supply and return temperature difference of the freezing main pipe is always greater than the sum of the water supply and return temperature set value of the freezing main pipe and a first temperature deviation preset value, increasing the working frequency of the freezing water pump by the first frequency preset value;
if the water supply temperature of the freezing main pipe is always less than the sum of the water outlet temperature set value of the freezing main pipe and the first temperature preset value, the water supply and return temperature difference of the freezing main pipe is always less than or equal to the sum of the water supply and return temperature set value of the freezing main pipe and the first temperature deviation preset value, and the water supply and return temperature difference of the freezing main pipe is always greater than the sum of the water supply and return temperature set value of the freezing main pipe and the second temperature deviation preset value, the working frequency of the freezing water pump is increased by a third frequency preset value.
Optionally, the third frequency preset value is in direct proportion to the difference between the temperature difference between the water supply and return of the freezing main pipe and the temperature difference between the water supply and return of the freezing main pipe.
Optionally, the determining the operating frequency of the chilled water pump according to the operating state of the compressor and the relationship between the supply water temperature of the freezing main pipe and the set water temperature of the freezing main pipe includes: when the working state of any compressor of the air conditioning unit is starting, in a continuous specific time,
if the water supply temperature of the freezing main pipe is always less than or equal to the sum of the water outlet temperature set value of the freezing main pipe and the second temperature preset value, and the water supply and return temperature difference of the freezing main pipe is always less than the difference between the water supply and return temperature set value of the freezing main pipe and the third temperature deviation preset value, reducing the working frequency of the freezing water pump by the second frequency preset value;
and if the water supply temperature of the freezing main pipe is always less than or equal to the sum of the water outlet temperature set value of the freezing main pipe and the second temperature preset value, the water supply and return temperature difference of the freezing main pipe is always greater than or equal to the difference between the water supply and return temperature set value of the freezing main pipe and the third temperature deviation preset value, and the water supply and return temperature difference of the freezing main pipe is always less than the difference between the water supply and return temperature set value of the freezing main pipe and the fourth temperature deviation preset value, reducing the working frequency of the freezing water pump by a fourth frequency preset value.
Optionally, the fourth frequency preset value is in direct proportion to a difference between a set value of the temperature difference between the water supply and return of the freezing main pipe and the temperature difference between the water supply and return of the freezing main pipe.
Optionally, the method further includes:
in the starting stage of the chilled water pump, if all electric butterfly valves of the air conditioning unit are unavailable within a continuous period of time, the chilled water pump is closed;
when the electric butterfly valve is available, the chilled water pump is started to enter the operation stage.
The invention also provides a control device of the air-conditioning chilled water pump, which comprises:
the acquisition module is used for acquiring the working state of the compressor, the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe when the freezing water pump runs;
the determining module is used for determining the working frequency of the chilled water pump according to the working state of the compressor and the size relationship between the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe;
and the control module is used for controlling the chilled water pump to operate according to the working frequency.
The invention also provides a controller for executing the control method of the air-conditioning chilled water pump.
The present invention also provides an air conditioning system comprising:
the control device of the air-conditioning chilled water pump is as described above.
By adopting the technical scheme, the control method of the air conditioner chilled water pump comprises the following steps: when the freezing water pump operates, acquiring the working state of the compressor, the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe; determining the working frequency of the chilled water pump according to the working state of the compressor and the relationship between the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe; and controlling the chilled water pump to operate according to the working frequency. The control method comprehensively controls the working frequency of the freezing water pump according to the working state of the compressor, the water supply temperature of the freezing main pipe and the temperature difference of the water supply and return of the freezing main pipe, so that the freezing water pump runs at the most appropriate frequency, the running efficiency of the freezing water pump is improved, and the whole air conditioning system is more energy-saving.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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 invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a control method for a chilled water pump of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a second embodiment of a method for controlling a chilled water pump of an air conditioner according to the present invention;
fig. 3 is a schematic structural diagram provided by an embodiment of a control device of an air-conditioning chilled water pump according to the invention.
In the figure: 1. an acquisition module; 2. a determination module; 3. and a control module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Fig. 1 is a schematic flow chart provided by an embodiment of a control method of an air conditioner chilled water pump according to the present invention.
As shown in fig. 1, a method for controlling an air conditioner chilled water pump according to the present embodiment includes:
s101: when the freezing water pump operates, acquiring the working state of the compressor, the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe;
s102: determining the working frequency of the chilled water pump according to the working state of the compressor and the relationship between the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe;
further, the determining the operating frequency of the chilled water pump according to the operating state of the compressor and the relationship between the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe comprises: when the working states of all the compressors of the air conditioning unit are closed,
if the temperature of the water supplied by the freezing main pipe is greater than or equal to the sum of the set value of the temperature of the water discharged by the freezing main pipe and the first preset temperature value, increasing the working frequency of the freezing water pump by the first preset frequency value at certain intervals until the working frequency is increased to the upper limit frequency value;
if the temperature of the water supplied by the freezing main pipe is less than or equal to the sum of the set value of the temperature of the water discharged by the freezing main pipe and the second preset temperature value, the working frequency of the freezing water pump is reduced by the second preset frequency value at certain time intervals until the working frequency is reduced to the lower limit frequency value.
S103: and controlling the chilled water pump to operate according to the working frequency.
According to the control method, when the working states of all the compressors of the air conditioning unit are closed, the working frequency of the chilled water pump is adjusted according to the magnitude relation between the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe, so that the chilled water pump runs at the most appropriate frequency, the running efficiency of the chilled water pump is improved, and the whole air conditioning system is more energy-saving.
Fig. 2 is a schematic flow chart of a control method of an air conditioner chilled water pump according to a second embodiment of the present invention.
As shown in fig. 2, a method for controlling an air conditioner chilled water pump according to the present embodiment includes:
s201: the frozen water pump enters an opening stage;
s202: judging whether all electric butterfly valves of the air conditioning unit are unavailable within a continuous period of time (such as 60 seconds);
s203: if all electric butterfly valves of the air conditioning unit are unavailable within a continuous period of time, closing the chilled water pump; otherwise, executing steps S204-S212;
s204: starting the freezing water pump according to the existing mode to enter an operation stage;
s205: when the freezing water pump runs, acquiring the working state of the compressor, the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe, and acquiring the temperature difference of the water supply and return of the freezing main pipe;
s206: judging whether the working state of the compressor is closed or not;
s207: when the working state of the compressor is off and the relationship between the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe meets the condition one, increasing the working frequency of the freezing water pump by a first frequency preset value F1 (such as 1Hz) at intervals of specific time t13 (the frequency adjustment time of the freezing water pump is 10 seconds) until the working frequency is increased to the upper frequency limit value;
s208: when the working state of the compressor is closed and the relationship between the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe meets the second condition, reducing the working frequency of the freezing water pump by a second frequency preset value F2 (such as 1Hz) at intervals of specific time t13 until the working frequency is reduced to a lower frequency limit value;
s209: when the working state of the compressor is starting and the condition three is met, increasing the working frequency of the chilled water pump by a first frequency preset value F1;
s210: when the working state of the compressor is starting and the condition is met, increasing the working frequency of the chilled water pump by a third frequency preset value F3;
s211: when the working state of the compressor is starting and the condition five is met, reducing the working frequency of the chilled water pump by a second frequency preset value F2;
s212: when the working state of the compressor is start and the condition six is satisfied, the working frequency of the chilled water pump is lowered by a fourth frequency preset value F4.
Wherein, the condition one: the temperature of the water supplied by the freezing main pipe is greater than or equal to the sum of the set value of the temperature of the water discharged by the freezing main pipe and a first preset temperature value (such as 5 ℃);
and a second condition: the temperature of the water supplied by the freezing main pipe is less than or equal to the sum of the set value of the water outlet temperature of the freezing main pipe and a second preset temperature value (such as 3 ℃);
and (3) carrying out a third condition: in a continuous specific time, if the water supply temperature of the freezing main pipe is always greater than or equal to the sum of the water outlet temperature set value of the freezing main pipe and a first temperature preset value, or if the water supply and return temperature difference of the freezing main pipe is always greater than the sum of the water supply and return temperature set value of the freezing main pipe and a first temperature deviation preset value (such as 1 ℃);
and a fourth condition: in a continuous specific time, if the water supply temperature of the freezing main pipe is always less than the sum of the water outlet temperature set value of the freezing main pipe and a first temperature preset value, the water supply and return temperature difference of the freezing main pipe is always less than or equal to the sum of the water supply and return temperature set value of the freezing main pipe and a first temperature deviation preset value, and the water supply and return temperature difference of the freezing main pipe is always greater than the sum of the water supply and return temperature set value of the freezing main pipe and a second temperature deviation preset value (such as 0.5 ℃);
and a fifth condition: in a continuous specific time, if the water supply temperature of the freezing main pipe is always less than or equal to the sum of the water outlet temperature set value of the freezing main pipe and a second temperature preset value, and the temperature difference of the water supply and return of the freezing main pipe is always less than the difference between the water supply and return temperature set value of the freezing main pipe and a third temperature deviation preset value (such as 1 ℃);
and a sixth condition: and in a continuous specific time, if the water supply temperature of the freezing main pipe is always less than or equal to the sum of the water outlet temperature set value of the freezing main pipe and the second temperature preset value, the water supply and return temperature difference of the freezing main pipe is always greater than or equal to the difference between the water supply and return temperature set value of the freezing main pipe and the third temperature deviation preset value, and the water supply and return temperature difference of the freezing main pipe is always less than the difference between the water supply and return temperature set value of the freezing main pipe and the fourth temperature deviation preset value (such as 0.5 ℃).
It should be noted that the preset values related to the determination conditions are preset according to actual situations, and are not limited herein. The third frequency preset value is in direct proportion to the difference value of the temperature difference between the water supply and return of the freezing main pipe and the temperature difference set value between the water supply and return of the freezing main pipe; the fourth frequency preset value is in direct proportion to the difference value between the temperature difference set value of the water supply and return of the freezing main pipe and the temperature difference of the water supply and return of the freezing main pipe.
During actual execution, if the relationship between the water supply temperature of the freezing main pipe, the water outlet temperature set value of the freezing main pipe and the obtained temperature difference of the water supply and return of the freezing main pipe does not meet any one of the above conditions, the freezing water pump is enabled to keep the current working frequency to continue to operate.
According to the control method, the working frequency of the freezing water pump is comprehensively controlled by combining the temperature difference between the supply water and the return water of the freezing main pipe according to the working state of the compressor and the water supply temperature of the freezing main pipe, so that the freezing water pump runs at the most appropriate frequency, the running efficiency of the freezing water pump is improved, and the whole air conditioning system is more energy-saving.
Fig. 3 is a schematic structural diagram provided by an embodiment of a control device of an air-conditioning chilled water pump according to the invention.
As shown in fig. 3, the control device of the air conditioner chilled water pump according to the embodiment includes:
the acquisition module 1 is used for acquiring the working state of the compressor, the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe when the freezing water pump runs;
the determining module 2 is used for determining the working frequency of the chilled water pump according to the working state of the compressor and the size relationship between the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe;
and the control module 3 is used for controlling the chilled water pump to operate according to the working frequency.
The working principle of the control device of the air-conditioning chilled water pump in this embodiment is the same as that of the control method of the air-conditioning chilled water pump in any one of the above embodiments, and details are not repeated here.
The control device of this embodiment according to the operating condition and the freezing house steward water supply temperature of compressor to combine freezing house steward to supply the return water difference in temperature integrated control freezing water pump's operating frequency, make freezing water pump with the most suitable frequency operation, not only improved the operating efficiency of freezing water pump, still make whole air conditioning system more energy-conserving.
The invention also provides a controller for executing the control method of the air-conditioning chilled water pump in the figure 1 or the figure 2.
The present invention also provides an air conditioning system comprising:
the control device of the air-conditioning chilled water pump is shown in figure 3.
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 the terms "first," "second," and the like in the description of the present invention 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 invention, 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 alternate implementations are included within the scope of the preferred embodiment of the present invention 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 invention.
It should be understood that portions of the present invention 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 invention 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, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. 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 invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. A control method of an air conditioner chilled water pump is characterized by comprising the following steps:
when the freezing water pump operates, acquiring the working state of the compressor, the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe;
determining the working frequency of the chilled water pump according to the working state of the compressor and the relationship between the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe;
controlling the chilled water pump to operate according to the working frequency;
acquiring the temperature difference of supply water and return water of a freezing main pipe;
the method for determining the working frequency of the chilled water pump according to the working state of the compressor and the relationship between the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe comprises the following steps: when the working state of any compressor of the air conditioning unit is starting, in a continuous specific time,
if the water supply temperature of the freezing main pipe is always greater than or equal to the sum of the water outlet temperature set value of the freezing main pipe and a first temperature preset value, or if the water supply and return temperature difference of the freezing main pipe is always greater than the sum of the water supply and return temperature set value of the freezing main pipe and a first temperature deviation preset value, increasing the working frequency of the freezing water pump by the first frequency preset value;
if the water supply temperature of the freezing main pipe is always less than the sum of the water outlet temperature set value of the freezing main pipe and the first temperature preset value, the water supply and return temperature difference of the freezing main pipe is always less than or equal to the sum of the water supply and return temperature set value of the freezing main pipe and the first temperature deviation preset value, and the water supply and return temperature difference of the freezing main pipe is always greater than the sum of the water supply and return temperature set value of the freezing main pipe and the second temperature deviation preset value, the working frequency of the freezing water pump is increased by a third frequency preset value.
2. The control method of claim 1, wherein determining the operating frequency of the chilled water pump based on the operating condition of the compressor and the relationship between the chilled main supply water temperature and the chilled main outlet water temperature setpoint comprises: when the working states of all the compressors of the air conditioning unit are closed,
if the temperature of the water supplied by the freezing main pipe is greater than or equal to the sum of the set value of the temperature of the water discharged by the freezing main pipe and the first preset temperature value, increasing the working frequency of the freezing water pump by the first preset frequency value at certain intervals until the working frequency is increased to the upper limit frequency value;
if the temperature of the water supplied by the freezing main pipe is less than or equal to the sum of the set value of the temperature of the water discharged by the freezing main pipe and the second preset temperature value, the working frequency of the freezing water pump is reduced by the second preset frequency value at certain time intervals until the working frequency is reduced to the lower limit frequency value.
3. The control method of claim 1, wherein the third frequency preset value is proportional to a difference between the freezer manifold supply-return temperature differential and a freezer manifold supply-return temperature differential set point.
4. The control method of claim 1, wherein determining the operating frequency of the chilled water pump based on the operating condition of the compressor and the relationship between the chilled main supply water temperature and the chilled main outlet water temperature setpoint comprises: when the working state of any compressor of the air conditioning unit is starting, in a continuous specific time,
if the water supply temperature of the freezing main pipe is always less than or equal to the sum of the water outlet temperature set value of the freezing main pipe and the second temperature preset value, and the water supply and return temperature difference of the freezing main pipe is always less than the difference between the water supply and return temperature set value of the freezing main pipe and the third temperature deviation preset value, reducing the working frequency of the freezing water pump by the second frequency preset value;
and if the water supply temperature of the freezing main pipe is always less than or equal to the sum of the water outlet temperature set value of the freezing main pipe and the second temperature preset value, the water supply and return temperature difference of the freezing main pipe is always greater than or equal to the difference between the water supply and return temperature set value of the freezing main pipe and the third temperature deviation preset value, and the water supply and return temperature difference of the freezing main pipe is always less than the difference between the water supply and return temperature set value of the freezing main pipe and the fourth temperature deviation preset value, reducing the working frequency of the freezing water pump by a fourth frequency preset value.
5. The control method of claim 4, wherein the fourth frequency preset value is proportional to a difference between the freezer manifold supply and return water temperature differential set point and the freezer manifold supply and return water temperature differential.
6. The control method according to any one of claims 1 to 5, characterized by further comprising:
in the starting stage of the chilled water pump, if all electric butterfly valves of the air conditioning unit are unavailable within a continuous period of time, the chilled water pump is closed;
when the electric butterfly valve is available, the chilled water pump is started to enter the operation stage.
7. The utility model provides a control device of air conditioner refrigerated water pump which characterized in that includes:
the acquisition module is used for acquiring the working state of the compressor, the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe when the freezing water pump runs;
the determining module is used for determining the working frequency of the chilled water pump according to the working state of the compressor and the size relationship between the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe;
the control module is used for controlling the chilled water pump to operate according to the working frequency;
the acquisition module is also used for acquiring the temperature difference between the supply water and the return water of the refrigeration main pipe;
the method for determining the working frequency of the chilled water pump according to the working state of the compressor and the relationship between the water supply temperature of the freezing main pipe and the set value of the water outlet temperature of the freezing main pipe comprises the following steps: when the working state of any compressor of the air conditioning unit is starting, in a continuous specific time,
if the water supply temperature of the freezing main pipe is always greater than or equal to the sum of the water outlet temperature set value of the freezing main pipe and a first temperature preset value, or if the water supply and return temperature difference of the freezing main pipe is always greater than the sum of the water supply and return temperature set value of the freezing main pipe and a first temperature deviation preset value, increasing the working frequency of the freezing water pump by the first frequency preset value;
if the water supply temperature of the freezing main pipe is always less than the sum of the water outlet temperature set value of the freezing main pipe and the first temperature preset value, the water supply and return temperature difference of the freezing main pipe is always less than or equal to the sum of the water supply and return temperature set value of the freezing main pipe and the first temperature deviation preset value, and the water supply and return temperature difference of the freezing main pipe is always greater than the sum of the water supply and return temperature set value of the freezing main pipe and the second temperature deviation preset value, the working frequency of the freezing water pump is increased by a third frequency preset value.
8. A controller for performing the method of controlling the air-conditioning chilled water pump according to any one of claims 1 to 6.
9. An air conditioning system, comprising:
the control device of the air-conditioning chilled water pump of claim 7.
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| CN114110933B (en) * | 2021-10-29 | 2023-08-01 | 珠海格力电器股份有限公司 | Control method of air source heat pump unit system and air source heat pump unit system |
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