CN114440494B - Compressor frequency adjusting method and device, computer equipment and storage medium - Google Patents
Compressor frequency adjusting method and device, computer equipment and storage medium Download PDFInfo
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- CN114440494B CN114440494B CN202210145356.9A CN202210145356A CN114440494B CN 114440494 B CN114440494 B CN 114440494B CN 202210145356 A CN202210145356 A CN 202210145356A CN 114440494 B CN114440494 B CN 114440494B
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- 238000000034 method Methods 0.000 title claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 138
- 230000008020 evaporation Effects 0.000 claims abstract description 89
- 238000001704 evaporation Methods 0.000 claims abstract description 89
- 238000006243 chemical reaction Methods 0.000 claims description 24
- 238000005057 refrigeration Methods 0.000 claims description 15
- 230000001174 ascending effect Effects 0.000 claims description 8
- 238000007710 freezing Methods 0.000 abstract description 17
- 230000008014 freezing Effects 0.000 abstract description 17
- 230000001276 controlling effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000002609 medium Substances 0.000 description 14
- 230000000630 rising effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004590 computer program Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 239000012120 mounting media Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
Classifications
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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
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- 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
- F25B49/022—Compressor control arrangements
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application relates to the technical field of heat pump systems, and particularly discloses a compressor frequency adjusting method, a device, computer equipment and a storage medium, wherein the method comprises the following steps: determining an initial frequency of the compressor; acquiring an evaporation temperature value and a water outlet temperature value of a unit; when the evaporation temperature value is smaller than the first preset threshold value and the evaporation temperature value is larger than or equal to the second preset threshold value, or when the outlet water temperature value is smaller than the fourth preset threshold value and the outlet water temperature value is larger than or equal to the fifth preset threshold value, controlling the compressor to maintain the initial frequency operation; when the evaporation temperature value is smaller than the second preset threshold value and larger than the third preset threshold value, or when the outlet water temperature value is smaller than the fifth preset threshold value and larger than the sixth preset threshold value, the initial frequency is reduced to a first frequency, the compressor is controlled to operate at the first frequency, and the first frequency is obtained after the initial frequency is reduced by a first specified value. According to the application, the frequency of the compressor is regulated according to the evaporation temperature value and the water outlet temperature value, so that freezing or frequent shutdown of a unit is avoided.
Description
Technical Field
The present application relates to the field of heat pump systems, and in particular, to a method and apparatus for adjusting frequency of a compressor, a computer device, and a storage medium.
Background
The air source heat pump unit for heating generally comprises a compressor, a four-way valve, a water side heat exchanger, an air side heat exchanger and a throttling device (generally an expansion valve), wherein when the water side heat exchanger is a condenser, the water side heat exchanger can heat water; when the flow direction of the four-way valve is switched, the water side heat exchanger which is originally a condenser can be made to be an evaporator, the air side heat exchanger which is originally an evaporator is made to be a condenser, defrosting operation of the air side heat exchanger is achieved, and meanwhile refrigerating operation of the water side heat exchanger is also achieved.
Because the traditional air source heat pump mainly heats in design and selection, the water outlet temperature of the water side heat exchanger or the evaporation temperature inside the water side heat exchanger is generally used as a protection shutdown temperature, and when the water side heat exchanger operates under a refrigeration working condition, the evaporation temperature and the water outlet temperature of the water side heat exchanger are lower, so that the water side heat exchanger is easy to freeze or a machine set is frequently shut down.
Disclosure of Invention
The aim of the embodiment of the application is that: provided are a compressor frequency adjustment method, apparatus, computer device, and storage medium, which can solve the above-mentioned problems existing in the prior art.
In order to achieve the above purpose, the application adopts the following technical scheme:
in a first aspect, a compressor frequency adjustment method is provided, comprising:
determining an initial frequency of the compressor;
acquiring an evaporation temperature value and a water outlet temperature value of a unit;
when the evaporation temperature value is smaller than a first preset threshold value and the evaporation temperature value is larger than or equal to a second preset threshold value, or when the outlet water temperature value is smaller than a fourth preset threshold value and the outlet water temperature value is larger than or equal to a fifth preset threshold value, controlling the compressor to maintain the initial frequency operation;
when the evaporation temperature value is smaller than a second preset threshold value and larger than a third preset threshold value, or when the outlet water temperature value is smaller than a fifth preset threshold value and larger than a sixth preset threshold value, the initial frequency is reduced to a first frequency, the compressor is controlled to operate at the first frequency, and the first frequency is obtained after the initial frequency is reduced by a first specified value.
As a preferred embodiment of the compressor frequency adjustment method, further comprising:
after the initial frequency is reduced to the first frequency, when the evaporation temperature value is smaller than a second preset threshold value and larger than a third preset threshold value, or when the outlet water temperature value is smaller than a fifth preset threshold value and larger than a sixth preset threshold value, obtaining a second frequency according to the first frequency;
controlling the compressor to operate at the second frequency.
As a preferable mode of the compressor frequency adjustment method, the obtaining the second frequency according to the first frequency includes:
executing an iteration step, wherein the iteration step specifically comprises the following steps:
in each period, if the evaporation temperature value is smaller than a second preset threshold value and larger than a third preset threshold value, or if the outlet water temperature value is smaller than a fifth preset threshold value and larger than a sixth preset threshold value, subtracting a second designated value from the first frequency to obtain a second frequency;
and re-executing the iteration step by taking the second frequency as the first frequency of the next period until the first frequency is smaller than or equal to a preset limit frequency, wherein the first frequency of the first period is obtained after the initial frequency is reduced by a first specified value.
As a preferred embodiment of the compressor frequency adjustment method, further comprising:
before determining the initial frequency of the compressor, judging whether the unit is in a refrigeration mode or not;
when the unit is in a refrigerating mode operation, acquiring an up-conversion instruction or a down-conversion instruction;
and determining the initial frequency of the compressor according to the frequency-up instruction or the frequency-down instruction.
As a preferable scheme of the compressor frequency adjusting method, when the evaporation temperature value is greater than or equal to a first preset threshold value, or when the outlet water temperature value is greater than or equal to a fourth preset threshold value, an up-conversion instruction or a down-conversion instruction is acquired, and the initial frequency of the compressor is determined according to the up-conversion instruction or the down-conversion instruction.
As a preferred embodiment of the compressor frequency adjustment method, further comprising:
and closing the compressor when the evaporation temperature value is smaller than or equal to a third preset threshold value or when the outlet water temperature value is smaller than or equal to a sixth preset threshold value.
As a preferred embodiment of the compressor frequency adjustment method, further comprising:
after the compressor is closed, timing and recording the downtime;
and determining the initial frequency of the compressor when the evaporation temperature value is greater than or equal to a seventh preset threshold value and the shutdown time is greater than or equal to a preset duration threshold value, or when the outlet water temperature value is greater than or equal to an eighth preset threshold value and the shutdown time is greater than or equal to the preset duration threshold value.
In a second aspect, there is provided a compressor frequency adjustment device comprising:
a determining module for determining an initial frequency of the compressor;
the acquisition module is used for acquiring the evaporation temperature value and the water outlet temperature value of the unit;
the control module is used for controlling the compressor to maintain the initial frequency operation when the evaporation temperature value is smaller than a first preset threshold value and the evaporation temperature value is larger than or equal to a second preset threshold value, or when the outlet water temperature value is smaller than a fourth preset threshold value and the outlet water temperature value is larger than or equal to a fifth preset threshold value;
the control module is further configured to reduce the initial frequency to a first frequency when the evaporation temperature value is smaller than a second preset threshold and larger than a third preset threshold, or when the outlet water temperature value is smaller than a fifth preset threshold and larger than a sixth preset threshold, and control the compressor to operate at the first frequency, where the first frequency is obtained after the initial frequency is reduced by a first specified value.
In a third aspect, there is provided a computer device comprising: a memory and one or more processors;
the memory is used for storing one or more programs;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the compressor frequency adjustment method.
In a fourth aspect, a storage medium is provided containing computer executable instructions for performing the compressor frequency adjustment method when executed by a computer processor.
The beneficial effects of the application are as follows:
the frequency adjusting measure of the compressor can be obtained by firstly determining the initial frequency of the compressor and judging the obtained unit evaporation temperature value with a first preset threshold value, a second preset threshold value and a third preset threshold value. When the evaporation temperature value is smaller than the first preset threshold value and the evaporation temperature value is larger than or equal to the second preset threshold value, the water side heat exchanger of the unit can be considered to be in a safe interval, the unit enters a refrigeration frequency limiting state, and the compressor is maintained to operate at an initial frequency, so that frequency rising is not allowed, and the evaporation temperature of the unit is prevented from being further reduced to be frozen. When the evaporation temperature value is smaller than a second preset threshold value and larger than a third preset threshold value, the water side heat exchanger of the unit can be considered to have freezing risk, the unit enters a refrigerating frequency reduction state, the first frequency is obtained after the initial frequency is reduced by a first designated value, the compressor is controlled to operate at the first frequency, further reduction of the evaporation temperature is slowed down by reducing the operating frequency of the compressor, and therefore the freezing of the water side heat exchanger of the unit or frequent shutdown of the unit is avoided, and normal refrigerating operation is guaranteed.
And similarly, judging the obtained water outlet temperature value of the unit with a fourth preset threshold value, a fifth preset threshold value and a sixth preset threshold value, wherein the water outlet temperature of the unit is obtained by measuring the water side heat exchanger and water and the output water, and frequency regulation measures of the compressor can also be obtained. When the outlet water temperature value is smaller than the fourth preset threshold value and the outlet water temperature value is larger than or equal to the fifth preset threshold value, the water side heat exchanger of the unit can be considered to be in a safe interval, the unit enters a refrigeration frequency limiting state, and the compressor is maintained to operate at an initial frequency, so that frequency rising is not allowed, and the outlet water temperature of the unit is prevented from further reducing. When the water outlet temperature value is smaller than a fifth preset threshold value and larger than a sixth preset threshold value, the water side heat exchanger of the unit can be considered to have freezing risk, the unit enters a refrigerating frequency reduction state, the first frequency is obtained after the initial frequency is reduced by a first designated value, the compressor is controlled to operate at the first frequency, the further reduction of the water outlet temperature is slowed down by reducing the operating frequency of the compressor, and therefore the freezing of the water side heat exchanger of the unit or the frequent shutdown of the unit is avoided, and the normal refrigerating work is ensured.
Drawings
The application is described in further detail below with reference to the drawings and examples.
Fig. 1 is a flowchart of a method for adjusting a compressor frequency according to an embodiment of the present application.
Fig. 2 is a flowchart of a method for adjusting a compressor frequency according to another embodiment of the present application.
Fig. 3 is a schematic structural diagram of a compressor frequency adjusting device according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of a computer device according to an embodiment of the present application.
In the figure:
31. a determining module; 32. an acquisition module; 33. a control module; 34. a timing recording module;
41. a processor; 42. a memory; 43. an input device; 44. and an output device.
Detailed Description
In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present application are described in further detail below, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In order to avoid freezing of a water side heat exchanger of a unit or frequent shutdown of the unit, as shown in fig. 1, an embodiment of the present application provides a method for adjusting a frequency of a compressor, including:
s101, determining the initial frequency of a compressor;
s102, acquiring an evaporation temperature value and a water outlet temperature value of a unit;
s103, when the evaporation temperature value is smaller than a first preset threshold value and the evaporation temperature value is larger than or equal to a second preset threshold value, or when the outlet water temperature value is smaller than a fourth preset threshold value and the outlet water temperature value is larger than or equal to a fifth preset threshold value, controlling the compressor to maintain initial frequency operation;
and S104, when the evaporation temperature value is smaller than the second preset threshold value and larger than the third preset threshold value, or when the outlet water temperature value is smaller than the fifth preset threshold value and larger than the sixth preset threshold value, the initial frequency is reduced to a first frequency, the compressor is controlled to operate at the first frequency, and the first frequency is obtained after the initial frequency is reduced by a first specified value.
The frequency adjusting measure of the compressor can be obtained by firstly determining the initial frequency of the compressor and judging the obtained unit evaporation temperature value with a first preset threshold value, a second preset threshold value and a third preset threshold value. When the evaporation temperature value is smaller than the first preset threshold value and the evaporation temperature value is larger than or equal to the second preset threshold value, the water side heat exchanger of the unit can be considered to be in a safe interval, the unit enters a refrigeration frequency limiting state, and the compressor is maintained to operate at an initial frequency, so that frequency rising is not allowed, and the evaporation temperature of the unit is prevented from further reducing. When the evaporation temperature value is smaller than a second preset threshold value and larger than a third preset threshold value, the water side heat exchanger of the unit can be considered to have freezing risk, the unit enters a refrigerating frequency reduction state, the first frequency is obtained after the initial frequency is reduced by a first designated value, the compressor is controlled to operate at the first frequency, further reduction of the evaporation temperature is slowed down by reducing the operating frequency of the compressor, and therefore the freezing of the water side heat exchanger of the unit or frequent shutdown of the unit is avoided, and normal refrigerating operation is guaranteed.
And similarly, judging the obtained water outlet temperature value of the unit with a fourth preset threshold value, a fifth preset threshold value and a sixth preset threshold value, wherein the water outlet temperature of the unit is obtained by measuring the water side heat exchanger and water and the output water, and frequency regulation measures of the compressor can also be obtained. When the outlet water temperature value is smaller than the fourth preset threshold value and the outlet water temperature value is larger than or equal to the fifth preset threshold value, the water side heat exchanger of the unit can be considered to be in a safe interval, the unit enters a refrigeration frequency limiting state, and the compressor is maintained to operate at an initial frequency, so that frequency rising is not allowed, and the outlet water temperature of the unit is prevented from further reducing. When the water outlet temperature value is smaller than a fifth preset threshold value and larger than a sixth preset threshold value, the water side heat exchanger of the unit can be considered to have freezing risk, the unit enters a refrigerating frequency reduction state, the first frequency is obtained after the initial frequency is reduced by a first designated value, the compressor is controlled to operate at the first frequency, the further reduction of the water outlet temperature is slowed down by reducing the operating frequency of the compressor, and therefore the freezing of the water side heat exchanger of the unit or the frequent shutdown of the unit is avoided, and the normal refrigerating work is ensured.
In a preferred embodiment, the first preset threshold is-2 ℃ to 0 ℃, the second preset threshold is-3 ℃ to-1 ℃, the third preset threshold is-4 ℃ to-2 ℃, the first preset threshold, the second preset threshold and the third preset threshold differ by 1 ℃ to 2 ℃, and the second preset threshold and the third preset threshold differ by 1 ℃ to 2 ℃. Similarly, the fourth preset threshold is 2 ℃ to 4 ℃, the fifth preset threshold is 3 ℃ to 5 ℃, the sixth preset threshold is 4 ℃ to 6 ℃, the first preset threshold and the second preset threshold differ by 1 ℃ to 2 ℃, and the fourth preset threshold, the fifth preset threshold and the sixth preset threshold differ by 1 ℃ to 2 ℃.
Further, the compressor frequency adjustment method of the present application further includes:
after the initial frequency is reduced to the first frequency, when the evaporation temperature value is smaller than a second preset threshold value and larger than a third preset threshold value, or when the outlet water temperature value is smaller than a fifth preset threshold value and larger than a sixth preset threshold value, the evaporation temperature or the outlet water temperature of the water side heat exchanger is reduced, the second frequency is obtained according to the first frequency, the compressor is controlled to operate at the second frequency, the reduction of the evaporation temperature is slowed down by further reducing the operation frequency of the compressor, and the freezing of the water side heat exchanger of the unit or the frequent shutdown of the unit is further avoided.
Still further, in the compressor frequency adjustment method of the present application, the step of obtaining the second frequency according to the first frequency includes:
executing an iteration step, wherein the iteration step specifically comprises the following steps:
in each cycle, if the evaporation temperature value is smaller than the second preset threshold value and larger than the third preset threshold value, or if the outlet water temperature value is smaller than the fifth preset threshold value and larger than the sixth preset threshold value, the evaporation temperature or the outlet water temperature of the water side heat exchanger is further reduced, the frequency of the compressor still needs to be reduced, and at the moment, the second designated value is subtracted from the first frequency to obtain a second frequency;
and taking the second frequency as the first frequency of the next period, and re-executing the iteration step until the first frequency is smaller than or equal to the preset limit frequency. The first frequency of the first period is obtained after the initial frequency is reduced by a first specified value, and the preset limit frequency is the minimum frequency at which the compressor can normally operate.
In another embodiment, the compressor frequency adjustment method of the present application further comprises:
before the initial frequency of the compressor is determined, whether the unit is in a refrigeration mode or not is judged, if the unit is not in the refrigeration mode, the water side heat exchanger is not frozen or even stopped, and the running frequency of the compressor is not required to be adjusted.
When the unit is in the refrigerating mode, an up-conversion instruction or a down-conversion instruction is acquired, and the initial frequency of the compressor is determined according to the up-conversion instruction or the down-conversion instruction. In this embodiment, the up-conversion instruction or the down-conversion instruction may be issued from the control background or from the client, which is not limited in particular.
Further, when the evaporation temperature value is greater than or equal to a first preset threshold value, or when the outlet water temperature value is greater than or equal to a fourth preset threshold value, the unit water side heat exchanger has no freezing risk or stop risk, the frequency raising instruction or the frequency lowering instruction can be directly obtained, and the frequency of the compressor can be randomly changed according to the frequency raising instruction or the frequency lowering instruction, so that the initial frequency of the compressor is determined.
In another embodiment, the compressor frequency adjustment method of the present application further comprises:
when the evaporation temperature value is smaller than or equal to a third preset threshold value, or when the outlet water temperature value is smaller than or equal to a sixth preset threshold value, the fact that the water side heat exchanger is frozen at the moment is indicated, emergency stop protection and maintenance are needed, and the compressor is directly turned off at the moment to protect the heat pump unit.
Still further, the compressor frequency adjustment method of the present application further includes:
after the compressor is turned off, timing and recording the downtime;
when the evaporation temperature value is greater than or equal to a seventh preset threshold value and the shutdown time is greater than or equal to a preset time threshold value, the temperature of the water side heat exchanger is raised, the freezing risk is avoided, the unit can be restarted according to the actual use requirement, and the initial frequency of the compressor is determined;
similarly, when the outlet water temperature value is greater than or equal to the eighth preset threshold value and the shutdown time is greater than or equal to the preset time threshold value, the temperature of the water side heat exchanger is also indicated to be raised, the starting machine can be started again, the initial frequency of the compressor is determined, and if the evaporation temperature or the outlet water temperature is further reduced, the operation frequency of the compressor can be adjusted again.
Referring to fig. 2, the present application also provides another method for adjusting a frequency of a compressor applied to a heat pump unit, including:
s201, judging whether the unit is in a refrigeration mode or not;
s202, when the unit is in a refrigerating mode operation, acquiring an up-conversion instruction or a down-conversion instruction;
s203, determining the initial frequency of the compressor according to the frequency-up instruction or the frequency-down instruction;
s204, acquiring an evaporation temperature value and a water outlet temperature value of the unit;
s205, when the evaporation temperature value is greater than or equal to a first preset threshold value, or when the outlet water temperature value is greater than or equal to a fourth preset threshold value, acquiring an ascending frequency instruction or a descending frequency instruction, and determining the initial frequency of the compressor according to the ascending frequency instruction or the descending frequency instruction;
s206, when the evaporation temperature value is smaller than the first preset threshold value and the evaporation temperature value is larger than or equal to the second preset threshold value, or when the outlet water temperature value is smaller than the fourth preset threshold value and the outlet water temperature value is larger than or equal to the fifth preset threshold value, controlling the compressor to maintain the initial frequency operation;
s207, when the evaporation temperature value is smaller than a second preset threshold value and larger than a third preset threshold value, or when the outlet water temperature value is smaller than a fifth preset threshold value and larger than a sixth preset threshold value, the initial frequency is reduced to a first frequency, the compressor is controlled to operate at the first frequency, and the first frequency is obtained after the initial frequency is reduced by a first specified value;
s208, after the initial frequency is reduced to the first frequency, when the evaporation temperature value is smaller than the second preset threshold and larger than the third preset threshold, or when the outlet water temperature value is smaller than the fifth preset threshold and larger than the sixth preset threshold, obtaining the second frequency according to the first frequency, including: executing an iteration step, wherein the iteration step specifically comprises the following steps:
in each period, if the evaporation temperature value is smaller than a second preset threshold value and larger than a third preset threshold value, or if the outlet water temperature value is smaller than a fifth preset threshold value and larger than a sixth preset threshold value, subtracting the second designated value from the first frequency to obtain a second frequency;
the second frequency is used as the first frequency of the next period, and the iteration step is re-executed until the first frequency is smaller than or equal to the preset limit frequency, wherein the first frequency of the first period is obtained after the initial frequency is reduced by a first appointed value;
s209, controlling the compressor to operate at a second frequency;
s210, when the evaporation temperature value is smaller than or equal to a third preset threshold value, or when the outlet water temperature value is smaller than or equal to a sixth preset threshold value, the compressor is turned off, and the time is counted and the stop time is recorded;
s211, determining the initial frequency of the compressor when the evaporation temperature value is greater than or equal to a seventh preset threshold value and the shutdown time is greater than or equal to a preset duration threshold value, or when the outlet water temperature value is greater than or equal to an eighth preset threshold value and the shutdown time is greater than or equal to the preset duration threshold value.
The compressor frequency adjustment method in this embodiment may have the same steps and achieve the same effects as the compressor frequency adjustment method in the above embodiment, and will not be described in detail in this embodiment.
Referring to fig. 3, the present application also provides a compressor frequency adjusting apparatus, comprising:
a determining module 31 for determining an initial frequency of the compressor;
an acquisition module 32, configured to acquire an evaporation temperature value and a water outlet temperature value of the unit;
a control module 33, configured to control the compressor to maintain the initial frequency operation when the evaporation temperature value is less than a first preset threshold and the evaporation temperature value is greater than or equal to a second preset threshold, or when the outlet water temperature value is less than a fourth preset threshold and the outlet water temperature value is greater than or equal to a fifth preset threshold;
the control module 33 is further configured to reduce the initial frequency to a first frequency when the evaporation temperature value is smaller than a second preset threshold and larger than a third preset threshold, or when the outlet water temperature value is smaller than a fifth preset threshold and larger than a sixth preset threshold, and control the compressor to operate at the first frequency, where the first frequency is obtained after the initial frequency is reduced by a first specified value.
The frequency adjusting measure of the compressor can be obtained by firstly determining the initial frequency of the compressor and judging the obtained unit evaporation temperature value and the first preset threshold value, the second preset threshold value and the third preset threshold value. When the evaporation temperature value is smaller than the first preset threshold value and the evaporation temperature value is larger than or equal to the second preset threshold value, the water side heat exchanger of the unit can be considered to be in a safe interval, the unit enters a refrigeration frequency limiting state, and the compressor is maintained to operate at an initial frequency, so that frequency rising is not allowed, and the evaporation temperature of the unit is prevented from further reducing. When the evaporation temperature value is smaller than a second preset threshold value and larger than a third preset threshold value, the water side heat exchanger of the unit can be considered to have freezing risk, the unit enters a refrigerating frequency reduction state, the first frequency is obtained after the initial frequency is reduced by a first designated value, the compressor is controlled to operate at the first frequency, further reduction of the evaporation temperature is slowed down by reducing the operating frequency of the compressor, and therefore the freezing of the water side heat exchanger of the unit or frequent shutdown of the unit is avoided, and normal refrigerating operation is guaranteed.
And similarly, judging the obtained water outlet temperature value of the unit with a fourth preset threshold value, a fifth preset threshold value and a sixth preset threshold value, wherein the water outlet temperature of the unit is obtained by measuring the water side heat exchanger and water and the output water, and frequency regulation measures of the compressor can also be obtained. When the outlet water temperature value is smaller than the fourth preset threshold value and the outlet water temperature value is larger than or equal to the fifth preset threshold value, the water side heat exchanger of the unit can be considered to be in a safe interval, the unit enters a refrigeration frequency limiting state, and the compressor is maintained to operate at an initial frequency, so that frequency rising is not allowed, and the outlet water temperature of the unit is prevented from further reducing. When the water outlet temperature value is smaller than a fifth preset threshold value and larger than a sixth preset threshold value, the water side heat exchanger of the unit can be considered to have freezing risk, the unit enters a refrigerating frequency reduction state, the first frequency is obtained after the initial frequency is reduced by a first designated value, the compressor is controlled to operate at the first frequency, the further reduction of the water outlet temperature is slowed down by reducing the operating frequency of the compressor, and therefore the freezing of the water side heat exchanger of the unit or the frequent shutdown of the unit is avoided, and the normal refrigerating work is ensured.
In a possible embodiment, the control module 33 is further configured to obtain, after the initial frequency is reduced to the first frequency, a second frequency according to the first frequency when the evaporation temperature value is smaller than a second preset threshold and greater than a third preset threshold, or when the outlet water temperature value is smaller than a fifth preset threshold and greater than a sixth preset threshold;
controlling the compressor to operate at the second frequency.
In one possible embodiment, when the control module 33 obtains the second frequency according to the first frequency, the method specifically includes:
executing an iteration step, wherein the iteration step specifically comprises the following steps:
in each period, if the evaporation temperature value is smaller than a second preset threshold value and larger than a third preset threshold value, or if the outlet water temperature value is smaller than a fifth preset threshold value and larger than a sixth preset threshold value, subtracting a second designated value from the first frequency to obtain a second frequency;
and re-executing the iteration step by taking the second frequency as the first frequency of the next period until the first frequency is smaller than or equal to a preset limit frequency, wherein the first frequency of the first period is obtained after the initial frequency is reduced by a first specified value.
In one possible embodiment, the acquisition module 32 is further configured to determine whether the unit is in a cooling mode before determining the initial frequency of the compressor;
when the unit is in a refrigerating mode operation, acquiring an up-conversion instruction or a down-conversion instruction;
the determining module 31 determines an initial frequency of the compressor according to the up-conversion instruction or the down-conversion instruction.
In one possible embodiment, the obtaining module 32 is further configured to obtain an up-conversion instruction or a down-conversion instruction when the evaporation temperature value is greater than or equal to a first preset threshold value, or when the outlet water temperature value is greater than or equal to a fourth preset threshold value;
in one possible embodiment, the control module 33 is further configured to shut down the compressor when the evaporation temperature value is less than or equal to a third preset threshold value, or when the outlet water temperature value is less than or equal to a sixth preset threshold value.
In one possible embodiment, the compressor frequency adjustment device further comprises a timing recording module 34, wherein the timing recording module 34 is used for timing and recording the shutdown time after the compressor is shut down;
the determining module 31 is further configured to determine an initial frequency of the compressor when the evaporation temperature value is greater than or equal to a seventh preset threshold and the shutdown time period is greater than or equal to a preset duration threshold, or when the outlet water temperature value is greater than or equal to an eighth preset threshold and the shutdown time period is greater than or equal to the preset duration threshold.
In addition, the embodiment of the application also provides computer equipment which can integrate the compressor frequency adjusting device provided by the embodiment of the application. Fig. 4 is a schematic structural diagram of a computer device according to an embodiment of the present application. Referring to fig. 4, the computer apparatus includes: an input device 43, an output device 44, a memory 42, and one or more processors 41; the memory 42 is configured to store one or more programs; the one or more programs, when executed by the one or more processors 41, cause the one or more processors 41 to implement the compressor frequency adjustment method as provided by the above embodiments. Wherein the input device 43, the output device 44, the memory 42 and the processor 41 may be connected by a bus or otherwise, for example in fig. 4 by a bus connection.
The memory 42 is a computer readable storage medium, and may be used to store a software program, a computer executable program, and program instructions/modules corresponding to the compressor frequency adjustment method according to any embodiment of the present application (e.g., the determining module 31, the obtaining module 32, and the controlling module 34 in the compressor frequency adjustment device). The memory 42 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for functions; the storage data area may store data created according to the use of the device, etc. In addition, memory 42 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some examples, memory 42 may further comprise memory located remotely from processor 41, which may be connected to the device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input means 43 may be used to receive entered numeric or character information and to generate key signal inputs related to user settings and function control of the device. The output device 44 may include a display device such as a display screen.
The processor 41 executes various functional applications of the apparatus and data processing, namely, implements the compressor frequency adjustment method described above, by running software programs, instructions and modules stored in the memory 42.
The compressor frequency adjusting device, the compressor frequency adjusting equipment and the compressor frequency adjusting computer provided by the embodiment can be used for executing the compressor frequency adjusting method provided by any embodiment, and have corresponding functions and beneficial effects.
The embodiment of the present application also provides a storage medium containing computer executable instructions, which when executed by a computer processor, are for performing the compressor frequency adjustment method as provided by the above embodiment, the compressor frequency adjustment method comprising: determining an initial frequency of the compressor; acquiring an evaporation temperature value and a water outlet temperature value of a unit; when the evaporation temperature value is smaller than a first preset threshold value and the evaporation temperature value is larger than or equal to a second preset threshold value, or when the outlet water temperature value is smaller than a fourth preset threshold value and the outlet water temperature value is larger than or equal to a fifth preset threshold value, controlling the compressor to maintain the initial frequency operation; when the evaporation temperature value is smaller than a second preset threshold value and larger than a third preset threshold value, or when the outlet water temperature value is smaller than a fifth preset threshold value and larger than a sixth preset threshold value, the initial frequency is reduced to a first frequency, the compressor is controlled to operate at the first frequency, and the first frequency is obtained after the initial frequency is reduced by a first specified value.
Storage media-any of various types of memory devices or storage devices. The term "storage medium" is intended to include: mounting media such as CD-ROM, floppy disk or tape devices; computer system memory or random access memory such as DRAM, DDR RAM, SRAM, EDO RAM, lanbas (Rambus) RAM, etc.; nonvolatile memory such as flash memory, magnetic media (e.g., hard disk or optical storage); registers or other similar types of memory elements, etc. The storage medium may also include other types of memory or combinations thereof. In addition, the storage medium may be located in a first computer system in which the program is executed, or may be located in a second, different computer system connected to the first computer system through a network such as the internet. The second computer system may provide program instructions to the first computer for execution. The term "storage medium" may include two or more storage media that may reside in different locations (e.g., in different computer systems connected by a network). The storage medium may store program instructions (e.g., embodied as a computer program) executable by one or more processors.
Of course, the storage medium containing the computer executable instructions provided in the embodiments of the present application is not limited to the compressor frequency adjustment method described above, and may also perform the related operations in the compressor frequency adjustment method provided in any embodiment of the present application.
The compressor frequency adjustment device, the device and the storage medium provided in the above embodiments may perform the compressor frequency adjustment method provided in any embodiment of the present application, and technical details not described in detail in the above embodiments may be referred to the compressor frequency adjustment method provided in any embodiment of the present application.
In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and the like are merely for convenience of description and to simplify the operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for providing a special meaning.
In the description herein, reference to the term "one embodiment," "an example," 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, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in the foregoing embodiments, and that the embodiments described in the foregoing embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.
The technical principle of the present application is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the application and should not be taken in any way as limiting the scope of the application. Other embodiments of the application will be apparent to those skilled in the art from consideration of this specification without undue burden.
Claims (6)
1. A compressor frequency adjustment method applied to a heat pump unit, comprising:
before determining the initial frequency of the compressor, judging whether the unit is in a refrigeration mode, and when the unit is in the refrigeration mode, acquiring an up-conversion instruction or a down-conversion instruction, and determining the initial frequency of the compressor according to the up-conversion instruction or the down-conversion instruction;
determining an initial frequency of the compressor;
acquiring an evaporation temperature value and a water outlet temperature value of a unit;
when the evaporation temperature value is smaller than a first preset threshold value and the evaporation temperature value is larger than or equal to a second preset threshold value, or when the outlet water temperature value is smaller than a fourth preset threshold value and the outlet water temperature value is larger than or equal to a fifth preset threshold value, controlling the compressor to maintain the initial frequency operation;
when the evaporation temperature value is greater than or equal to a first preset threshold value, or when the outlet water temperature value is greater than or equal to a fourth preset threshold value, acquiring an ascending frequency instruction or a descending frequency instruction, and determining the initial frequency of the compressor according to the ascending frequency instruction or the descending frequency instruction;
when the evaporation temperature value is smaller than a second preset threshold value and larger than a third preset threshold value, or when the outlet water temperature value is smaller than a fifth preset threshold value and larger than a sixth preset threshold value, the initial frequency is reduced to a first frequency, the compressor is controlled to operate at the first frequency, and the first frequency is obtained after the initial frequency is reduced by a first specified value;
after the initial frequency is reduced to the first frequency, when the evaporation temperature value is smaller than a second preset threshold value and larger than a third preset threshold value, or when the outlet water temperature value is smaller than a fifth preset threshold value and larger than a sixth preset threshold value, obtaining a second frequency according to the first frequency, wherein the method comprises the steps of executing iteration, and the iteration step specifically comprises the steps of: in each cycle, if the evaporation temperature value is smaller than a second preset threshold and larger than a third preset threshold, or if the outlet water temperature value is smaller than a fifth preset threshold and larger than a sixth preset threshold, subtracting a second designated value from the first frequency to obtain a second frequency, taking the second frequency as a first frequency of a next cycle, and re-executing the iteration step until the first frequency is smaller than or equal to a preset limit frequency, wherein the first frequency of the first cycle is obtained after the initial frequency is reduced by the first designated value, and controlling the compressor to operate at the second frequency.
2. The compressor frequency adjustment method of claim 1, further comprising:
and closing the compressor when the evaporation temperature value is smaller than or equal to a third preset threshold value or when the outlet water temperature value is smaller than or equal to a sixth preset threshold value.
3. The compressor frequency adjustment method of claim 2, further comprising:
after the compressor is closed, timing and recording the downtime;
and determining the initial frequency of the compressor when the evaporation temperature value is greater than or equal to a seventh preset threshold value and the shutdown time is greater than or equal to a preset duration threshold value, or when the outlet water temperature value is greater than or equal to an eighth preset threshold value and the shutdown time is greater than or equal to the preset duration threshold value.
4. A compressor frequency adjustment device for use in a heat pump apparatus, comprising:
a determining module for determining an initial frequency of the compressor;
the acquisition module is used for acquiring the evaporation temperature value and the water outlet temperature value of the unit; before determining the initial frequency of the compressor, judging whether the unit is in a refrigeration mode, and when the unit is in the refrigeration mode, acquiring an ascending frequency instruction or a descending frequency instruction, and determining the initial frequency of the compressor according to the ascending frequency instruction or the descending frequency instruction; when the evaporation temperature value is greater than or equal to a first preset threshold value, or when the outlet water temperature value is greater than or equal to a fourth preset threshold value, an ascending frequency instruction or a descending frequency instruction is acquired, and the initial frequency of the compressor is determined according to the ascending frequency instruction or the descending frequency instruction;
the control module is used for controlling the compressor to maintain the initial frequency operation when the evaporation temperature value is smaller than a first preset threshold value and the evaporation temperature value is larger than or equal to a second preset threshold value, or when the outlet water temperature value is smaller than a fourth preset threshold value and the outlet water temperature value is larger than or equal to a fifth preset threshold value;
the control module is further configured to reduce the initial frequency to a first frequency when the evaporation temperature value is smaller than a second preset threshold and larger than a third preset threshold, or when the outlet water temperature value is smaller than a fifth preset threshold and larger than a sixth preset threshold, and control the compressor to operate at the first frequency, where the first frequency is obtained after the initial frequency is reduced by a first specified value;
the control module is further configured to, after the initial frequency is reduced to a first frequency, control the compressor to operate at the second frequency according to the first frequency when the evaporation temperature value is smaller than a second preset threshold and larger than a third preset threshold, or when the outlet water temperature value is smaller than a fifth preset threshold and larger than a sixth preset threshold;
when the control module obtains the second frequency according to the first frequency, the method specifically includes: executing an iteration step, wherein the iteration step specifically comprises the following steps: in each period, if the evaporation temperature value is smaller than a second preset threshold and larger than a third preset threshold, or if the outlet water temperature value is smaller than a fifth preset threshold and larger than a sixth preset threshold, subtracting a second designated value from the first frequency to obtain a second frequency, taking the second frequency as a first frequency of a next period, and re-executing the iteration step until the first frequency is smaller than or equal to a preset limit frequency, wherein the first frequency of the first period is obtained after the initial frequency is reduced by the first designated value.
5. A computer device, comprising: a memory and one or more processors;
the memory is used for storing one or more programs;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the compressor frequency adjustment method of any one of claims 1-3.
6. A storage medium containing computer executable instructions which, when executed by a computer processor, are for performing the compressor frequency adjustment method of any one of claims 1-3.
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