CN114353382A - Starting control method and device of air source heat pump unit and storage medium - Google Patents
Starting control method and device of air source heat pump unit and storage medium Download PDFInfo
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Abstract
The invention relates to the technical field of air source heat pump units, in particular provides a starting control method and device of an air source heat pump unit and a storage medium, and aims to solve the problem of how to quickly raise the water inlet temperature of a water side heat exchanger of the air source heat pump unit. For the purpose, the air source heat pump unit comprises a water side heat exchanger and a bypass pipeline, wherein one end of the bypass pipeline is connected with a water inlet of the water side heat exchanger, and the other end of the bypass pipeline is connected with a water outlet of the water side heat exchanger. The starting control method comprises the following steps: acquiring the actual inlet water temperature of a water inlet of a water side heat exchanger; judging whether the actual inlet water temperature is less than or equal to a preset temperature threshold value or not; if so, controlling part of water output by the water outlet of the water side heat exchanger to flow back to the water inlet of the water side heat exchanger through the bypass pipeline so as to improve the actual inlet water temperature of the water inlet. The water inlet temperature of the water side heat exchanger can be increased by returning the water at the water outlet which has been subjected to heat exchange by the water side heat exchanger to the water inlet of the water side heat exchanger.
Description
Technical Field
The invention relates to the technical field of air source heat pump units, and particularly provides a starting control method and device of an air source heat pump unit and a storage medium.
Background
The air source heat pump unit can absorb heat in air through a refrigerant circulating system of the air source heat pump unit so as to heat water. Generally speaking, when the air source heat pump unit is started for the first time, the temperature of water in a water pipe is lower, on the premise, the exhaust temperature of a refrigerant circulating system is lower due to the low water temperature, the air supplementing and enthalpy increasing function of the compressor can be started only when the exhaust temperature is higher than a certain value, if the water temperature is always in a lower state, the air supplementing and enthalpy increasing function cannot be started by the compressor, the heating capacity and the performance coefficient of the air source heat pump unit are greatly influenced, and the water temperature is slowly increased. In addition, when the water temperature is low, the evaporation temperature is generally low, so that the fins of the heat exchanger are easy to frost, the air source heat pump unit can frequently defrost, and the water temperature can slowly rise.
Accordingly, there is a need in the art for a new start-up control scheme for an air source heat pump unit to solve the above problems.
Disclosure of Invention
The invention aims to solve the technical problem, namely, the problem of how to quickly raise the inlet water temperature of the water side heat exchanger of the air source heat pump unit when the air source heat pump unit is started is solved or at least partially solved.
In a first aspect, the present invention provides a start control method for an air source heat pump unit, where the air source heat pump unit includes a water-side heat exchanger, the air source heat pump unit further includes a bypass pipeline, one end of the bypass pipeline is connected to a water inlet of the water-side heat exchanger, and the other end of the bypass pipeline is connected to a water outlet of the water-side heat exchanger, and the method includes:
acquiring the actual inlet water temperature of a water inlet of the water side heat exchanger;
judging whether the actual inlet water temperature is less than or equal to a preset temperature threshold value or not;
if so, controlling part of water output by the water outlet of the water side heat exchanger to flow back to the water inlet of the water side heat exchanger through the bypass pipeline so as to increase the actual water inlet temperature of the water inlet.
In one technical solution of the start control method of the air source heat pump unit, an electric control valve for adjusting water flow in the bypass pipeline is arranged on the bypass pipeline, and the step of "controlling a part of water output from a water outlet of the water side heat exchanger to flow back to a water inlet of the water side heat exchanger through the bypass pipeline" specifically includes:
and adjusting the opening degree of the electric adjusting valve according to the temperature difference between the target water inlet temperature and the actual water inlet temperature so as to control part of water output by the water outlet of the water side heat exchanger to flow back to the water inlet of the water side heat exchanger through the bypass pipeline.
In one technical solution of the start control method of the air source heat pump unit, the step of "adjusting the opening degree of the electric control valve according to the temperature difference between the target inlet water temperature and the actual inlet water temperature" specifically includes:
acquiring the temperature difference between the target inlet water temperature and the actual inlet water temperature of the water inlet in the current opening adjusting period and the actual opening of the electric adjusting valve after the opening of the electric adjusting valve is adjusted in the last opening adjusting period aiming at each opening adjusting period;
if the temperature difference is larger than zero, increasing the actual opening according to the opening adjustment amount corresponding to the temperature difference;
and if the temperature difference is smaller than zero, reducing the actual opening according to the opening adjustment amount corresponding to the temperature difference.
In one technical solution of the start control method of the air source heat pump unit, when the temperature difference is greater than zero, the method further includes obtaining an opening degree adjustment amount corresponding to the temperature difference by:
if the temperature difference is larger than a preset temperature difference threshold value, directly taking the opening degree regulating quantity corresponding to the preset temperature difference threshold value as the opening degree regulating quantity corresponding to the temperature difference;
if the temperature difference is larger than a plurality of preset different temperature difference threshold values, selecting the opening degree regulating quantity corresponding to the maximum temperature difference threshold value as the opening degree regulating quantity corresponding to the temperature difference;
the size of the preset temperature difference threshold value and the size of the opening degree regulating quantity form a positive correlation;
and/or the like and/or,
when the temperature difference is less than zero, the method further comprises the following steps of obtaining the opening degree regulating quantity corresponding to the temperature difference:
if the temperature difference is smaller than a first temperature difference threshold value and is larger than or equal to a second temperature difference threshold value, the opening degree regulating quantity corresponding to the temperature difference is a preset opening degree regulating quantity;
and if the temperature difference is smaller than the second temperature difference threshold value, determining an opening degree regulating quantity corresponding to the temperature difference according to the actual opening degree of the electric regulating valve, and closing the electric regulating valve after the actual opening degree is reduced according to the opening degree regulating quantity.
In a second aspect, the present invention provides a start control device for an air source heat pump unit, where the air source heat pump unit includes a water-side heat exchanger, and the start control device is characterized in that the air source heat pump unit further includes a bypass pipeline, one end of the bypass pipeline is connected to a water inlet of the water-side heat exchanger, and the other end of the bypass pipeline is connected to a water outlet of the water-side heat exchanger, and the device includes:
a water temperature acquisition module configured to acquire an actual inlet water temperature of a water inlet of the water side heat exchanger;
a water temperature determination module configured to determine whether the actual inlet water temperature is less than or equal to a preset temperature threshold;
the water outlet backflow module is configured to control a part of water output by the water outlet of the water side heat exchanger to flow back to the water inlet of the water side heat exchanger through the bypass pipeline so as to raise the actual water inlet temperature of the water inlet.
In an embodiment of the start control device of the air source heat pump unit, an electric control valve for adjusting water flow in the bypass line is disposed on the bypass line, and the outlet water return module is further configured to perform the following operations:
and adjusting the opening degree of the electric adjusting valve according to the temperature difference between the target water inlet temperature and the actual water inlet temperature so as to control part of water output by the water outlet of the water side heat exchanger to flow back to the water inlet of the water side heat exchanger through the bypass pipeline.
In one embodiment of the start control device of the air source heat pump unit, the water outlet reflux module further includes an electric control valve opening degree adjusting submodule, and the electric control valve opening degree adjusting module is further configured to perform the following operations:
acquiring the temperature difference between the target inlet water temperature and the actual inlet water temperature of the water inlet in the current opening adjusting period and the actual opening of the electric adjusting valve after the opening of the electric adjusting valve is adjusted in the last opening adjusting period aiming at each opening adjusting period;
if the temperature difference is larger than zero, increasing the actual opening according to the opening adjustment amount corresponding to the temperature difference;
and if the temperature difference is smaller than zero, reducing the actual opening according to the opening adjustment amount corresponding to the temperature difference.
In an aspect of the start control device of the air source heat pump unit, when the temperature difference is greater than zero, the opening adjustment submodule of the electrical control valve is further configured to obtain an opening adjustment corresponding to the temperature difference by performing the following steps:
if the temperature difference is larger than a preset temperature difference threshold value, directly taking the opening degree regulating quantity corresponding to the preset temperature difference threshold value as the opening degree regulating quantity corresponding to the temperature difference;
if the temperature difference is larger than a plurality of preset different temperature difference threshold values, selecting the opening degree regulating quantity corresponding to the maximum temperature difference threshold value as the opening degree regulating quantity corresponding to the temperature difference;
the size of the preset temperature difference threshold value and the size of the opening degree regulating quantity form a positive correlation;
and/or the like and/or,
when the temperature difference is less than zero, the electric control valve opening degree adjusting submodule is further configured to acquire an opening degree adjusting amount corresponding to the temperature difference by executing the following steps:
if the temperature difference is smaller than a first temperature difference threshold value and is larger than or equal to a second temperature difference threshold value, the opening degree regulating quantity corresponding to the temperature difference is a preset opening degree regulating quantity;
and if the temperature difference is smaller than the second temperature difference threshold value, determining an opening degree regulating quantity corresponding to the temperature difference according to the actual opening degree of the electric regulating valve, and closing the electric regulating valve after the actual opening degree is reduced according to the opening degree regulating quantity.
In a third aspect, a control device is provided, which includes a processor and a storage device, wherein the storage device is adapted to store a plurality of program codes, and the program codes are adapted to be loaded and run by the processor to execute the start-up control method of the air source heat pump unit according to any one of the above-mentioned technical solutions.
In a fourth aspect, a computer-readable storage medium is provided, in which a plurality of program codes are stored, and the program codes are adapted to be loaded and run by a processor to execute the start-up control method of the air source heat pump unit according to any one of the above-mentioned aspects of the start-up control method of the air source heat pump unit.
Under the condition of adopting the technical scheme, the water inlet and the water outlet of the water side heat exchanger can be connected through the bypass pipeline, then when the actual water inlet temperature of the water side heat exchanger is determined to be less than or equal to the preset temperature threshold value, part of water output by the water outlet of the water side heat exchanger flows back to the water inlet of the water side heat exchanger through the bypass pipeline, and the water output by the water outlet of the water side heat exchanger exchanges heat through the water side heat exchanger, namely, the temperature of the water output by the water outlet of the water side heat exchanger is higher than the temperature of the water input by the water inlet of the water side heat exchanger, so that the water output by the water outlet of the water side heat exchanger flows back to the water inlet of the water side heat exchanger through the bypass pipeline, and the water inlet temperature of the water side heat exchanger of the air source heat pump unit can be quickly increased when the air source heat pump unit is started.
Drawings
The disclosure of the present invention will become more readily understood with reference to the accompanying drawings. As is readily understood by those skilled in the art: these drawings are for illustrative purposes only and are not intended to constitute a limitation on the scope of the present invention. Moreover, in the drawings, like numerals are used to indicate like parts, and in which:
FIG. 1 is a schematic flow chart illustrating the main steps of a start-up control method of an air source heat pump unit according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an air source heat pump unit according to an embodiment of the start control method of the air source heat pump unit;
fig. 3 is a schematic diagram of the main structure of a start control device of an air source heat pump unit according to an embodiment of the invention.
List of reference numerals：
21: a water side heat exchanger; 22: a bypass line; 23: a temperature sensor; 24: an electric control valve; 25: a temperature sensor;
31: a water temperature acquisition module; 32: a water temperature judging module; 33: and the effluent backflow module.
Detailed Description
Some embodiments of the invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
In the description of the present invention, a "module" or "processor" may include hardware, software, or a combination of both. A module may comprise hardware circuitry, various suitable sensors, communication ports, memory, may comprise software components such as program code, or may be a combination of software and hardware. The processor may be a central processing unit, a microprocessor, a digital signal processor, or any other suitable processor. The processor has data and/or signal processing functionality. The processor may be implemented in software, hardware, or a combination thereof. Non-transitory computer readable storage media include any suitable medium that can store program code, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, random-access memory, and the like.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic flow chart illustrating main steps of a start control method of an air source heat pump unit according to an embodiment of the present invention, and fig. 2 is a schematic structural diagram of the air source heat pump unit according to the embodiment of the present invention. As shown in fig. 2, the air source heat pump unit in this embodiment includes a water-side heat exchanger 21 and a bypass line 22, one end of the bypass line 22 is connected to a water inlet of the water-side heat exchanger 21, and the other end of the bypass line 22 is connected to a water outlet of the water-side heat exchanger 21. The starting control method of the air source heat pump unit in the embodiment of the invention mainly comprises the following steps S101-S103.
Step S101: the actual inlet water temperature of the water inlet of the water side heat exchanger 21 is obtained.
The water side heat exchanger 21 refers to a heat exchanger for exchanging heat with water in the air source heat pump unit.
The actual inlet water temperature refers to the temperature of the water input into the water-side heat exchanger 21.
Continuing to refer to fig. 2, in an implementation manner of this embodiment, a temperature sensor 23 and a temperature sensor 25 may be respectively disposed at the water inlet and the water outlet of the water side heat exchanger 21, the actual inlet water temperature of the water inlet of the water side heat exchanger 21 is obtained by the temperature sensor 23, so as to check the actual inlet water temperature of the water inlet of the water side heat exchanger in real time, the actual outlet water temperature of the water outlet of the water side heat exchanger 21 is obtained by the temperature sensor 25, so as to check the actual outlet water temperature of the water outlet of the water side heat exchanger in real time, where the actual outlet water temperature refers to the temperature of the water output by the water side heat exchanger 21.
Step S102: and judging whether the actual inlet water temperature is less than or equal to a preset temperature threshold value, if so, executing the step S103, and if not, returning to the step S101.
In an embodiment of this embodiment, a temperature threshold may be preset, if the actual water inlet temperature is greater than the temperature threshold, it is determined that the water inlet temperature of the water-side heat exchanger 21 is not required to be raised currently, and if the actual water inlet temperature is less than or equal to the temperature threshold, it is determined that the water inlet temperature of the water-side heat exchanger 21 is too low currently, and the water inlet temperature of the water-side heat exchanger 21 is required to be raised. For example, the temperature threshold is set to 30 ℃, and if the current actual inlet water temperature is 20 ℃, it may be determined that the actual inlet water temperature is less than the preset temperature threshold.
Step S103: part of the water output from the water outlet of the water side heat exchanger 21 is controlled to flow back to the water inlet of the water side heat exchanger 21 through the bypass pipeline 22, so as to raise the actual inlet water temperature of the water inlet.
After the actual water inlet temperature of the water-side heat exchanger 21 is determined to be less than or equal to the preset temperature threshold, part of the water output from the water outlet of the water-side heat exchanger 21 can be controlled to flow back to the water inlet of the water-side heat exchanger 21 through the bypass pipeline 22, even if the water at the water outlet of the water-side heat exchanger 21 and the water input from the water inlet of the water-side heat exchanger 21 are merged, the actual water inlet temperature of the water-side heat exchanger 21 is increased after the merging.
With reference to fig. 2, in an embodiment of the present embodiment, the bypass line 22 may further include an electric control valve 24 for adjusting a water flow rate in the bypass line 22, and step S103 may specifically include:
and adjusting the opening degree of the electric adjusting valve 24 according to the temperature difference between the target inlet water temperature and the actual inlet water temperature so as to control part of water output by the water outlet of the water side heat exchanger 21 to flow back to the water inlet of the water side heat exchanger 21 through the bypass pipeline 22.
Specifically, a target inlet water temperature may be set, and the target inlet water temperature refers to a water temperature value to which the actual inlet water temperature of the water-side heat exchanger needs to be raised. The target inlet water temperature may be the same as or different from the preset temperature threshold, for example, the target inlet water temperature is set to 30 ℃ as the preset temperature threshold, or the target inlet water temperature is set to 40 ℃, the preset temperature threshold is set to 30 ℃, and so on.
The opening degree of the electric control valve 24 can be adjusted according to the temperature difference between the target inlet water temperature and the actual inlet water temperature, for example, if the actual inlet water temperature is 10 ℃, and the target inlet water temperature is 40 ℃, then obviously, the temperature difference is 30 ℃, which is relatively large, so that the opening degree of the electric control valve 24 can be adjusted to be relatively large, for example, the opening degree of the electric control valve 24 is adjusted to be half of the maximum opening degree of the electric control valve 24, and the like; also for example, assuming that the actual intake water temperature is 38 ℃ and the target intake water temperature is 40 ℃, it is obvious that the temperature difference is 2 ℃, which is relatively small, so the opening degree of the electric control valve 24 may be adjusted relatively small, for example, the opening degree of the electric control valve 24 is set to one tenth of the maximum opening degree of the electric control valve 24, and so on. The opening of the electric regulating valve 24 is adjusted according to different temperature differences, so that the water flow can be controlled more accurately, and the actual inlet water temperature is more accurately close to or reaches the target inlet water temperature.
In an embodiment of the present embodiment, the step of "adjusting the opening degree of the electric control valve 24 according to the temperature difference between the target inlet water temperature and the actual inlet water temperature" may specifically include:
for each opening adjustment period, the temperature difference between the target inlet water temperature and the actual inlet water temperature of the water inlet in the current opening adjustment period is obtained, and the actual opening of the electric control valve 24 after the opening adjustment of the electric control valve 24 is performed in the previous opening adjustment period.
And if the temperature difference is larger than zero, increasing the actual opening according to the opening adjustment amount corresponding to the temperature difference.
And if the temperature difference is smaller than zero, reducing the actual opening according to the opening adjustment amount corresponding to the temperature difference.
Specifically, the process of adjusting the opening of the electric control valve 24 may be divided into a plurality of adjustment cycles, for example, after detecting that the actual inlet water temperature is less than or equal to a preset temperature threshold, first determining the temperature difference between the target inlet water temperature and the actual inlet water temperature, and then adjusting the opening of the electric control valve 24 according to the temperature difference, for example, adjusting the actual opening of the electric control valve to the actual opening
(assuming that N is the maximum opening degree of the electric regulator valve 24); after the next preset regulation period is reached (assuming that each regulation period is 10 seconds), namely, the actual inlet water temperature is obtained again after 10 seconds, then the temperature difference between the target inlet water temperature and the actual inlet water temperature is determined, then the actual opening degree of the electric regulating valve 24 after the electric regulating valve 24 is subjected to opening degree regulation in the previous opening degree regulation period is obtained, and assuming that the temperature difference is greater than zero, the actual opening degree of the electric regulating valve 24 can be continuously increased, for example, the actual opening degree of the electric regulating valve 24 after the electric regulating valve 24 is subjected to opening degree regulation in the previous opening degree regulation period is equal to
The opening degree of the electric control valve 24 is increased according to the opening degree adjustment amount corresponding to the temperature difference
That is, the actual opening degree of the electric control valve 24 after the opening degree adjustment is set to
Similarly, if the temperature difference is less than zero, the actual opening may be decreased according to the opening adjustment corresponding to the temperature difference, for example, the electric control valve may be adjusted according to the opening adjustment corresponding to the temperature differenceActual opening degree of 24 is decreased
That is, the actual opening degree of the electric control valve 24 after the opening degree of the electric control valve 24 is adjusted is
If the temperature difference is less than zero, it indicates that the actual inlet water temperature is greater than the target inlet water temperature, and the actual opening of the electric control valve 24 may be reduced, that is, the water flow returning from the water outlet of the water-side heat exchanger 21 to the water inlet of the water-side heat exchanger 21 through the bypass pipeline 22 is actually reduced.
In addition, in order to facilitate the process of adjusting the opening degree of the electric control valve 24, during the first adjustment period, i.e., after the actual inlet water temperature is determined to be less than or equal to the preset temperature threshold for the first time, the opening degree of the electric control valve 24 may be directly adjusted to a certain fixed opening degree, for example, after the actual inlet water temperature is detected to be less than or equal to the preset temperature threshold, the opening degree adjustment amount of the electric control valve 24 is not determined according to the temperature difference, but the opening degree value of the electric control valve 24 is directly adjusted to
After the second preset adjusting period is reached, the opening adjusting quantity of the electric adjusting valve 24 is determined according to the temperature difference.
By the method, different opening degree adjusting methods of the electric adjusting valve 24 are adopted according to different temperature differences, so that the actual inlet water temperature is quickly and accurately close to or reaches the target inlet water temperature.
In an embodiment of this embodiment, when the temperature difference is greater than zero, the start-up control method of the air source heat pump unit may further include obtaining an opening degree adjustment amount corresponding to the temperature difference by:
and if the temperature difference is larger than a preset temperature difference threshold value, directly taking the opening degree regulating quantity corresponding to the preset temperature difference threshold value as the opening degree regulating quantity corresponding to the temperature difference.
And if the temperature difference is larger than a plurality of preset different temperature difference threshold values, selecting the opening degree regulating quantity corresponding to the maximum temperature difference threshold value as the opening degree regulating quantity corresponding to the temperature difference. In the present embodiment, the magnitude of the preset temperature difference threshold value and the magnitude of the opening degree adjustment amount are in a positive correlation relationship, that is, the greater the value of the preset temperature difference threshold value is, the greater the value of the opening degree adjustment amount is, and the smaller the value of the preset temperature difference threshold value is, the smaller the value of the opening degree adjustment amount is.
Specifically, the larger the temperature difference is, the larger the difference between the target inflow water temperature and the actual inflow water temperature is, the lower the actual inflow water temperature is, the actual inflow water temperature needs to be increased as soon as possible, a plurality of temperature difference thresholds can be set, the opening adjustment amounts of the electric control valves 24 corresponding to different temperature difference thresholds are different, the larger the temperature difference is, the larger the opening adjustment amount of the electric control valves 24 is, the more water flows back from the water outlet of the water side heat exchanger 21 to the water inlet of the water side heat exchanger 21 through the bypass pipeline 22, and the more the effect of increasing the actual inflow water temperature is. Referring to table 1 below, for example, when the temperature difference is greater than 0 ℃, the opening adjustment amount of the electrical regulator valve 24 is
When the temperature difference is greater than 5 ℃, the opening degree regulating quantity of the electric regulating valve 24 is
When the temperature difference is greater than 10 ℃, the opening degree regulating quantity of the electric regulating valve 24 is
When the temperature difference is greater than 15 ℃, the opening degree regulating quantity of the electric regulating valve 24 is
When the temperature difference is greater than 20 ℃, the opening degree regulating quantity of the electric regulating valve 24 is
TABLE 1
Assuming that the temperature difference is 2 ℃, it can be seen that the temperature difference is greater than the preset temperature difference threshold value of 0 ℃, then
As the opening degree regulating quantity corresponding to 2 ℃; assuming a temperature difference of 14 ℃, it can be seen that the temperature difference is greater than a plurality of preset temperature difference thresholds, so that the maximum temperature difference threshold can be selected, i.e. the temperature difference is about to be 14 ℃
As the opening degree adjustment amount corresponding to 14 ℃.
By the method, different opening adjusting methods of the electric adjusting valve 24 can be adopted under the condition that the temperature difference is larger than zero, the actual inlet water temperature is quickly increased, and the actual inlet water temperature adjusting method is more accurate because different temperature differences correspond to different opening adjusting amounts of the electric adjusting valve 24.
In an embodiment of this embodiment, when the temperature difference is less than zero, the start-up control method of the air source heat pump unit may further include obtaining an opening degree adjustment amount corresponding to the temperature difference by:
and if the temperature difference is smaller than the first temperature difference threshold and larger than or equal to the second temperature difference threshold, the opening degree adjustment amount corresponding to the temperature difference is a preset opening degree adjustment amount.
And if the temperature difference is smaller than the second temperature difference threshold value, determining an opening degree regulating quantity corresponding to the temperature difference according to the actual opening degree of the electric regulating valve, so as to close the electric regulating valve after reducing the actual opening degree according to the opening degree regulating quantity.
When the temperature difference is less than zero, the opening regulating quantity of different electric regulating valves 24 can be determined according to different temperature differences, on the premise that the temperature difference is less than zero, the smaller the temperature difference is, the higher the actual inlet water temperature is, the smaller the opening regulating quantity of the electric regulating valves 24 is, and if the temperature difference is less than a certain degree, the water at the water outlet of the water side heat exchanger 21 can not be caused to pass by any moreThe through line 22 returns to the water inlet of the water side heat exchanger 21. For example, the first temperature difference threshold value may be set to-2 ℃, the second temperature difference threshold value may be set to-5 ℃, and when the temperature difference is less than-2 ℃ and greater than or equal to-5 ℃, the opening degree adjustment amount of the electric control valve may be set to
When the temperature difference is less than zero but equal to or greater than the first temperature difference threshold, an opening degree adjustment amount may also be set, for example, the opening degree adjustment amount is set to
And so on.
Assuming that a certain regulation period determines that the temperature difference is-3 ℃, N/5 can be used as the opening degree regulating quantity of the electric control valve 24, and the actual opening degree of the electric control valve 24 is reduced
For another example, if the temperature difference is determined to be-6 ℃ in a certain regulation period, the current actual opening degree of the electric control valve 24 can be obtained, which is assumed to be
Then will be
As the opening degree adjustment amount, the actual opening degree of the electric control valve 24 is decreased
I.e. actually directly closing the electrovalve.
By the method, the opening degree regulating quantity of the electric regulating valve 24 can be determined according to different conditions under the condition that the temperature difference is less than zero, and the electric regulating valve 24 is closed in time when the temperature difference is less than a certain degree, so that the actual inlet water temperature is stopped to be regulated, and the opening degree regulating method of the electric regulating valve 24 is more accurate and effective.
It should be noted that all the above embodiments and examples refer to the temperature, the threshold value, the opening degree adjustment amount, and the like, which are only exemplary illustrations for explaining the corresponding embodiments, and it should be understood by those skilled in the art that those skilled in the art can freely determine according to actual situations or actual needs, for example, other temperature difference threshold values and the like are set according to actual needs.
Based on the above steps S101 to S103, the water inlet and the water outlet of the water side heat exchanger 21 can be connected by the bypass pipeline, and then when it is determined that the actual water inlet temperature of the water side heat exchanger 21 is less than or equal to the preset temperature threshold, a part of water output from the water outlet of the water side heat exchanger 21 flows back to the water inlet of the water side heat exchanger 21 through the bypass pipeline 22, because the water output from the water outlet of the water side heat exchanger 21 is subjected to heat exchange by the water side heat exchanger 21, that is, the water temperature of the water output from the water outlet of the water side heat exchanger 21 is higher than the water temperature of the water input from the water inlet of the water side heat exchanger 21, therefore, the water output from the water outlet of the water side heat exchanger 21 flows back to the water inlet of the water side heat exchanger 21 through the bypass pipeline 22, and the water inlet temperature of the air source heat pump unit can be rapidly raised when the air source heat pump unit is started.
It should be noted that, although the foregoing embodiments describe each step in a specific sequence, those skilled in the art will understand that, in order to achieve the effect of the present invention, different steps do not necessarily need to be executed in such a sequence, and they may be executed simultaneously (in parallel) or in other sequences, and these changes are all within the protection scope of the present invention.
Furthermore, the invention also provides a starting control device of the air source heat pump unit.
Referring to fig. 3, fig. 3 is a main block diagram of a start control device of an air source heat pump unit according to an embodiment of the present invention. As shown in fig. 3, the start control device of the air source heat pump unit in the embodiment of the present invention mainly includes a water temperature obtaining module 31, a water temperature determining module 32, and an effluent backflow module 33. In some embodiments, one or more of the water temperature obtaining module 31, the water temperature judging module 32 and the outlet water returning module 33 may be combined together into one module. In some embodiments the water temperature acquisition module 31 may be configured to acquire the actual incoming water temperature of the water inlet of the water side heat exchanger. The water temperature determination module 32 may be configured to determine whether the actual inlet water temperature is less than or equal to a preset temperature threshold. The outlet water return module 33 may be configured to control a portion of the water output from the water outlet of the water side heat exchanger to return to the water inlet of the water side heat exchanger via the bypass pipeline to raise the actual inlet water temperature of the water inlet. In one embodiment, the description of the specific implementation function may refer to the description of step S101 to step S103.
In one embodiment, an electric regulating valve for regulating the flow rate of water in the bypass pipeline is arranged on the bypass pipeline, and the outlet water return module is further configured to perform the following operations:
and adjusting the opening of the electric adjusting valve according to the temperature difference between the target inlet water temperature and the actual inlet water temperature so as to control part of water output by the water outlet of the water side heat exchanger to flow back to the water inlet of the water side heat exchanger through a bypass pipeline.
In one embodiment, the outlet water return module may further include an electric control valve opening adjustment submodule, and the electric control valve opening adjustment module is further configured to:
acquiring the temperature difference between the target inlet water temperature and the actual inlet water temperature of the water inlet in the current opening adjusting period and the actual opening of the electric regulating valve after the opening of the electric regulating valve is adjusted in the previous opening adjusting period aiming at each opening adjusting period;
if the temperature difference is larger than zero, increasing the actual opening according to the opening adjustment amount corresponding to the temperature difference;
if the temperature difference is smaller than zero, reducing the actual opening according to the opening adjustment amount corresponding to the temperature difference;
the size of the preset temperature difference threshold value is in positive correlation with the size of the opening degree regulating quantity.
In one embodiment, when the temperature difference is greater than zero, the electric control valve opening degree adjustment submodule may be further configured to obtain an opening degree adjustment amount corresponding to the temperature difference by performing the following steps:
and if the temperature difference is larger than a preset temperature difference threshold value, directly taking the opening degree regulating quantity corresponding to the preset temperature difference threshold value as the opening degree regulating quantity corresponding to the temperature difference.
And if the temperature difference is larger than a plurality of preset different temperature difference threshold values, selecting the opening degree regulating quantity corresponding to the maximum temperature difference threshold value as the opening degree regulating quantity corresponding to the temperature difference.
In one embodiment, when the temperature difference is less than zero, the electric control valve opening degree adjustment submodule may be further configured to obtain an opening degree adjustment amount corresponding to the temperature difference by performing the following steps:
and if the temperature difference is smaller than the first temperature difference threshold and larger than or equal to the second temperature difference threshold, the opening degree adjustment amount corresponding to the temperature difference is a preset opening degree adjustment amount.
And if the temperature difference is smaller than the second temperature difference threshold value, determining an opening degree regulating quantity corresponding to the temperature difference according to the actual opening degree of the electric regulating valve, so as to close the electric regulating valve after reducing the actual opening degree according to the opening degree regulating quantity.
The above start control device of the air source heat pump unit is used for executing the start control method embodiment of the air source heat pump unit shown in fig. 1, and the technical principles, the solved technical problems and the generated technical effects of the two are similar, and it can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working process and related description of the start control device of the air source heat pump unit may refer to the contents described in the embodiment of the start control method of the air source heat pump unit, and are not repeated here.
It will be understood by those skilled in the art that all or part of the flow of the method according to the above-described embodiment may be implemented by a computer program, which may be stored in a computer-readable storage medium and used to implement the steps of the above-described embodiments of the method when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable storage medium may include: any entity or device capable of carrying said computer program code, media, usb disk, removable hard disk, magnetic diskette, optical disk, computer memory, read-only memory, random access memory, electrical carrier wave signals, telecommunication signals, software distribution media, etc. It should be noted that the computer readable storage medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable storage media that does not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
Furthermore, the invention also provides a control device. In an embodiment of the control device according to the present invention, the control device includes a processor and a storage device, the storage device may be configured to store a program for executing the start-up control method of the air source heat pump unit of the above-mentioned method embodiment, and the processor may be configured to execute a program in the storage device, the program including but not limited to a program for executing the start-up control method of the air source heat pump unit of the above-mentioned method embodiment. For convenience of explanation, only the parts related to the embodiments of the present invention are shown, and details of the specific techniques are not disclosed. The control device may be a control device apparatus formed including various electronic apparatuses.
Further, the invention also provides a computer readable storage medium. In one computer-readable storage medium embodiment according to the present invention, the computer-readable storage medium may be configured to store a program for executing the start-up control method of the air source heat pump unit of the above method embodiment, and the program may be loaded and executed by a processor to implement the start-up control method of the air source heat pump unit. For convenience of explanation, only the parts related to the embodiments of the present invention are shown, and details of the specific techniques are not disclosed. The computer readable storage medium may be a storage device formed by including various electronic devices, and optionally, the computer readable storage medium is a non-transitory computer readable storage medium in the embodiment of the present invention.
Further, it should be understood that, since the configuration of each module is only for explaining the functional units of the apparatus of the present invention, the corresponding physical devices of the modules may be the processor itself, or a part of software, a part of hardware, or a part of a combination of software and hardware in the processor. Thus, the number of individual modules in the figures is merely illustrative.
Those skilled in the art will appreciate that the various modules in the apparatus may be adaptively split or combined. Such splitting or combining of specific modules does not cause the technical solutions to deviate from the principle of the present invention, and therefore, the technical solutions after splitting or combining will fall within the protection scope of the present invention.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. The starting control method of the air source heat pump unit comprises a water side heat exchanger and is characterized by further comprising a bypass pipeline, wherein one end of the bypass pipeline is connected with a water inlet of the water side heat exchanger, the other end of the bypass pipeline is connected with a water outlet of the water side heat exchanger, and the method comprises the following steps:
acquiring the actual inlet water temperature of a water inlet of the water side heat exchanger;
judging whether the actual inlet water temperature is less than or equal to a preset temperature threshold value or not;
if so, controlling part of water output by the water outlet of the water side heat exchanger to flow back to the water inlet of the water side heat exchanger through the bypass pipeline so as to increase the actual water inlet temperature of the water inlet.
2. The start-up control method of the air source heat pump unit according to claim 1, wherein the bypass pipeline is provided with an electric control valve for adjusting water flow in the bypass pipeline, and the step of controlling a part of water output from the water outlet of the water side heat exchanger to flow back to the water inlet of the water side heat exchanger through the bypass pipeline specifically comprises:
and adjusting the opening degree of the electric adjusting valve according to the temperature difference between the target water inlet temperature and the actual water inlet temperature so as to control part of water output by the water outlet of the water side heat exchanger to flow back to the water inlet of the water side heat exchanger through the bypass pipeline.
3. The start control method of the air source heat pump unit according to claim 2, wherein the step of adjusting the opening degree of the electric control valve according to the temperature difference between the target inlet water temperature and the actual inlet water temperature specifically comprises:
acquiring the temperature difference between the target inlet water temperature and the actual inlet water temperature of the water inlet in the current opening adjusting period and the actual opening of the electric adjusting valve after the opening of the electric adjusting valve is adjusted in the last opening adjusting period aiming at each opening adjusting period;
if the temperature difference is larger than zero, increasing the actual opening according to the opening adjustment amount corresponding to the temperature difference;
and if the temperature difference is smaller than zero, reducing the actual opening according to the opening adjustment amount corresponding to the temperature difference.
4. The start-up control method of the air source heat pump unit according to claim 3, wherein when the temperature difference is greater than zero, the method further comprises the step of obtaining the opening degree regulating quantity corresponding to the temperature difference by:
if the temperature difference is larger than a preset temperature difference threshold value, directly taking the opening degree regulating quantity corresponding to the preset temperature difference threshold value as the opening degree regulating quantity corresponding to the temperature difference;
if the temperature difference is larger than a plurality of preset different temperature difference threshold values, selecting the opening degree regulating quantity corresponding to the maximum temperature difference threshold value as the opening degree regulating quantity corresponding to the temperature difference;
the size of the preset temperature difference threshold value and the size of the opening degree regulating quantity form a positive correlation;
and/or the like and/or,
when the temperature difference is less than zero, the method further comprises the following steps of obtaining the opening degree regulating quantity corresponding to the temperature difference:
if the temperature difference is smaller than a first temperature difference threshold value and is larger than or equal to a second temperature difference threshold value, the opening degree regulating quantity corresponding to the temperature difference is a preset opening degree regulating quantity;
and if the temperature difference is smaller than the second temperature difference threshold value, determining an opening degree regulating quantity corresponding to the temperature difference according to the actual opening degree of the electric regulating valve, and closing the electric regulating valve after the actual opening degree is reduced according to the opening degree regulating quantity.
5. The utility model provides an air source heat pump unit's start control device, a serial communication port, air source heat pump unit includes water side heat exchanger, a serial communication port, air source heat pump unit still includes the bypass line, the one end of bypass line with the water inlet of water side heat exchanger is connected, the other end of bypass line with the delivery port of water side heat exchanger is connected, the device includes:
a water temperature acquisition module configured to acquire an actual inlet water temperature of a water inlet of the water side heat exchanger;
a water temperature determination module configured to determine whether the actual inlet water temperature is less than or equal to a preset temperature threshold;
the water outlet backflow module is configured to control a part of water output by the water outlet of the water side heat exchanger to flow back to the water inlet of the water side heat exchanger through the bypass pipeline so as to raise the actual water inlet temperature of the water inlet.
6. The start-up control device of an air source heat pump unit according to claim 5, wherein an electric control valve for adjusting the water flow in the bypass line is disposed on the bypass line, and the outlet water return module is further configured to perform the following operations:
and adjusting the opening degree of the electric adjusting valve according to the temperature difference between the target water inlet temperature and the actual water inlet temperature so as to control part of water output by the water outlet of the water side heat exchanger to flow back to the water inlet of the water side heat exchanger through the bypass pipeline.
7. The start-up control device of an air source heat pump unit according to claim 6, wherein the water outlet backflow module further comprises an electric control valve opening degree adjusting submodule, and the electric control valve opening degree adjusting module is further configured to perform the following operations:
acquiring the temperature difference between the target inlet water temperature and the actual inlet water temperature of the water inlet in the current opening adjusting period and the actual opening of the electric adjusting valve after the opening of the electric adjusting valve is adjusted in the last opening adjusting period aiming at each opening adjusting period;
if the temperature difference is larger than zero, increasing the actual opening according to the opening adjustment amount corresponding to the temperature difference;
and if the temperature difference is smaller than zero, reducing the actual opening according to the opening adjustment amount corresponding to the temperature difference.
8. The start-up control device of an air source heat pump unit according to claim 7, wherein when the temperature difference is greater than zero, the electric control valve opening degree adjustment submodule is further configured to obtain an opening degree adjustment amount corresponding to the temperature difference by performing the following steps:
if the temperature difference is larger than a preset temperature difference threshold value, directly taking the opening degree regulating quantity corresponding to the preset temperature difference threshold value as the opening degree regulating quantity corresponding to the temperature difference;
if the temperature difference is larger than a plurality of preset different temperature difference threshold values, selecting the opening degree regulating quantity corresponding to the maximum temperature difference threshold value as the opening degree regulating quantity corresponding to the temperature difference;
the size of the preset temperature difference threshold value and the size of the opening degree regulating quantity form a positive correlation;
and/or the like and/or,
when the temperature difference is less than zero, the electric control valve opening degree adjusting submodule is further configured to acquire an opening degree adjusting amount corresponding to the temperature difference by executing the following steps:
if the temperature difference is smaller than a first temperature difference threshold value and is larger than or equal to a second temperature difference threshold value, the opening degree regulating quantity corresponding to the temperature difference is a preset opening degree regulating quantity;
and if the temperature difference is smaller than the second temperature difference threshold value, determining an opening degree regulating quantity corresponding to the temperature difference according to the actual opening degree of the electric regulating valve, and closing the electric regulating valve after the actual opening degree is reduced according to the opening degree regulating quantity.
9. A control device comprising a processor and a memory device, wherein the memory device is suitable for storing a plurality of program codes, and the program codes are suitable for being loaded and operated by the processor to execute the start-up control method of the air source heat pump unit according to any one of claims 1 to 4.
10. A computer readable storage medium having stored therein a plurality of program codes, wherein the program codes are adapted to be loaded and executed by a processor to execute the start-up control method of the air source heat pump unit according to any one of claims 1 to 4.
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