CN113432354B - Air source heat pump control method and device, air source heat pump and storage medium - Google Patents
Air source heat pump control method and device, air source heat pump and storage medium Download PDFInfo
- Publication number
- CN113432354B CN113432354B CN202110694339.6A CN202110694339A CN113432354B CN 113432354 B CN113432354 B CN 113432354B CN 202110694339 A CN202110694339 A CN 202110694339A CN 113432354 B CN113432354 B CN 113432354B
- Authority
- CN
- China
- Prior art keywords
- demand
- preset
- coefficient
- compressor
- temperature difference
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Abstract
The invention discloses an air source heat pump control method, an air source heat pump control device, an air source heat pump and a storage medium, and solves the problem of frequent start and stop caused by controlling the frequency of a compressor according to the outlet water temperature in the conventional air source heat pump control method; calculating a demand coefficient through the indoor temperature or the return water temperature; judging whether the demand coefficient is larger than a preset demand threshold value or not; if the demand coefficient is larger than a preset demand threshold, correcting the demand coefficient; adjusting the operating frequency of the compressor through the corrected demand coefficient; according to the technical scheme, the demand coefficient is calculated through the indoor temperature, the running frequency of the compressor is subjected to self-adaptive adjustment through the corrected demand coefficient, the compressor is reduced to the temperature shutdown times on the basis that the comfort of a user can be met, the problem of frequent startup and shutdown caused by controlling the frequency of the compressor according to the outlet water temperature is solved, the running cost is reduced, and the running life of a machine is prolonged.
Description
Technical Field
The invention relates to the technical field of heat pumps, in particular to an air source heat pump control method and device, an air source heat pump and a storage medium.
Background
Along with the trend of clean heating with low coalification and low carbon of heat sources, the air source heat pump is used as better clean energy and is widely used in China at present.
The existing control method of the air source heat pump mainly controls the frequency of a compressor of the air source heat pump according to the return water temperature or the outlet water temperature as a control point, but due to the hysteresis of water temperature feedback, particularly when the required heat load is not large, frequent shutdown of the machine at the temperature is easy to occur, energy conservation is not facilitated, and the service life of the compressor is also influenced.
Disclosure of Invention
The embodiment of the invention provides an air source heat pump control method and device, an air source heat pump and a storage medium, and solves the problem of frequent start and stop caused by the fact that the existing air source heat pump control method controls the frequency of a compressor according to the outlet water temperature.
In one aspect, the present application provides an air source heat pump control method, which is applied to an air source heat pump, where the air source heat pump includes a compressor; the method comprises the following steps:
calculating a demand coefficient through the indoor temperature or the backwater temperature;
judging whether the demand coefficient is larger than a preset demand threshold value or not;
if the demand coefficient is larger than a preset demand threshold, correcting the demand coefficient;
and adjusting the running frequency of the compressor through the corrected demand coefficient.
In some embodiments of the present application, if the demand coefficient is greater than a preset demand threshold, the modifying the demand coefficient, and adjusting the operating frequency of the compressor through the modified demand coefficient includes:
if the demand coefficient is larger than a preset demand threshold, the outdoor temperature, the preset outdoor temperature and the preset outdoor temperature difference are determined;
calculating the temperature difference between the outdoor temperature and the preset outdoor temperature;
calculating the ratio of the temperature difference to the preset outdoor temperature difference to obtain an initial correction coefficient corresponding to the outdoor temperature;
and performing product operation on the initial correction coefficient and the demand coefficient, and correcting the demand coefficient to obtain a corrected demand coefficient.
In some embodiments of the present application, the adjusting the operating frequency of the compressor by the modified demand factor includes:
acquiring the running frequency of the compressor and a preset frequency difference value of the compressor;
multiplying the corrected demand coefficient by a preset frequency difference value of the compressor to obtain a product, and adding the product to the operating frequency of the compressor to obtain a target frequency of the compressor;
controlling the compressor to operate at a target frequency of the compressor.
In some embodiments of the present application, the calculating the demand coefficient by the indoor temperature or the return water temperature further includes:
acquiring indoor temperature or return water temperature;
calculating an indoor temperature difference between the indoor temperature and a preset target indoor temperature or calculating a return water temperature difference between the return water temperature and a preset target return water temperature;
comparing the indoor temperature difference with a preset indoor temperature difference, or comparing the return water temperature difference with a preset return water temperature difference;
if the indoor temperature difference is larger than the preset indoor temperature difference, or the return water temperature difference is larger than the preset return water temperature difference, the indoor temperature difference or the demand coefficient corresponding to the return water temperature difference is obtained.
In some embodiments of the present application, after determining whether the demand coefficient is greater than a preset demand threshold, the method further includes:
and if the demand coefficient is less than or equal to the preset demand threshold, controlling the compressor to operate according to a preset frequency.
In some embodiments of the present application, after controlling the compressor to operate at the preset frequency if the demand coefficient is less than or equal to the preset demand threshold, the method includes:
controlling the compressor to operate according to a preset frequency for a preset time;
acquiring the current indoor temperature or the current return water temperature, and updating the demand coefficient according to the current indoor temperature or the current return water temperature;
judging whether the updated demand coefficient is less than or equal to the preset demand threshold value;
and if the updated demand coefficient is less than or equal to the preset demand threshold, controlling the compressor to stand by.
In another aspect, the present application provides an air-source heat pump control apparatus including:
the coefficient module is used for calculating a demand coefficient through the indoor temperature or the return water temperature;
the judging module is used for judging whether the demand coefficient is larger than a preset demand threshold value or not;
the correction module is used for correcting the demand coefficient if the demand coefficient is larger than a preset demand threshold;
and the adjusting module is used for adjusting the running frequency of the compressor through the corrected demand coefficient.
In another aspect, the present application provides an air-source heat pump comprising: comprises a memory and a processor; the memory stores an application program, and the processor is used for running the application program in the memory to execute the operation in the air source heat pump control method.
In another aspect, the present application provides a storage medium storing a plurality of instructions, the instructions being suitable for loading by a processor to execute the steps of the air-source heat pump control method.
According to the technical scheme, the demand coefficient is calculated through the indoor temperature or the return water temperature; judging whether the demand coefficient is larger than a preset demand threshold value or not; if the demand coefficient is larger than a preset demand threshold, correcting the demand coefficient; adjusting the operating frequency of the compressor through the corrected demand coefficient; according to the technical scheme, the demand coefficient is calculated through the indoor temperature, the running frequency of the compressor is subjected to self-adaptive adjustment through the corrected demand coefficient, the compressor is reduced to the temperature shutdown times on the basis that the comfort of a user can be met, the problem of frequent startup and shutdown caused by controlling the frequency of the compressor according to the outlet water temperature is solved, the running cost is reduced, and the running life of a machine is prolonged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of an air source heat pump provided by an embodiment of the present application;
FIG. 2 is a schematic flow chart diagram illustrating an embodiment of a method for controlling an air-source heat pump according to an embodiment of the present disclosure;
FIG. 3 is a schematic flow chart illustrating an embodiment of adjusting an operating frequency range of a compressor in an air source heat pump control method according to an embodiment of the present application;
FIG. 4 is a schematic flow chart of an embodiment of a modified demand factor in an air source heat pump control method according to an embodiment of the present disclosure;
FIG. 5 is a schematic flow chart of an embodiment of calculating a demand factor in an air source heat pump control method according to an embodiment of the application;
fig. 6 is an application scenario embodiment of an air source heat pump control method provided by an embodiment of the present application;
FIG. 7 is a schematic structural diagram of an embodiment of an air source heat pump control device according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of an embodiment of an air source heat pump provided by an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides an air source heat pump control method and device, an air source heat pump and a storage medium.
In accordance with an embodiment of the air source heat pump control method provided by the embodiments of the present application, it should be noted that the steps illustrated in the flowchart of the drawings may be implemented in a computer system such as a set of computer executable instructions, and that while a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be implemented in an order different than that described herein.
In some embodiments of the present application, the air source heat pump control method provided by the embodiments of the present application is applied to an air source heat pump. In some embodiments of the present application, the air source heat pump may be a single air source heat pump. In some embodiments of the present application, the air source heat pump may be an air source heat pump unit composed of a plurality of air source heat pumps.
In some embodiments of the present application, an air-source heat pump includes a compressor, an outdoor heat exchanger, and an indoor heat exchanger. Exemplarily, as shown in fig. 1, fig. 1 is a schematic structural diagram of an embodiment of an air source heat pump provided in an embodiment of the present application, and for convenience of description, only a part related to the embodiment of the present application is shown, where the air source heat pump includes: a compressor 101, a four-way valve 102, a double pipe heat exchanger 103, a fin heat exchanger 104, an outdoor temperature sensor 105, a return water temperature sensor 106 and a gas-liquid separator 107.
The double-pipe heat exchanger comprises a water outlet pipe 108 and a water return pipe 109, wherein the water outlet pipe 108 is connected with the four-way valve 102 and is used for sending hot water to the heating tail end to supply heat to the heating tail end; the return water pipe 109 is provided with a return water temperature sensor 106, and the return water temperature sensor 106 is used for detecting the return water temperature; the water return pipe 109 and the fin heat exchanger 104 are used for conveying hot water subjected to heat exchange at the heating end to the fin heat exchanger 104 for heat exchange.
The fin heat exchanger 104 is provided with an outdoor temperature sensor 105, and the outdoor temperature sensor 105 is used for detecting outdoor temperature; the input end of the fin heat exchanger 104 is connected with the water return pipeline 109 of the double pipe heat exchanger 103, and the output end of the fin heat exchanger 104 is connected with the four-way valve 102 and is used for exchanging heat with hot water after heat exchange at the tail end of the heating system.
Four ports of the four-way valve 102 are connected to a double pipe heat exchanger 103, a fin heat exchanger 104, a compressor 101, and a gas-liquid separator 107, respectively.
The working principle of the air source heat pump is as follows:
a low-temperature and low-pressure refrigerant is compressed to a heating medium in a high-temperature and high-pressure state by a compressor 101, the heating medium enters a double-pipe heat exchanger 103 through a four-way valve 102, the heating medium is delivered to a heating tail end together with a water outlet pipe 108 of the double-pipe heat exchanger 103 so as to be supplied to the heating tail end for heating, and hot water after heat exchange at the heating tail end is delivered to a fin heat exchanger 104; the hot water after heat exchange at the heating end is evaporated by the fin heat exchanger 104, absorbs heat in outdoor air, and enters the compressor 101 in a low-temperature and low-pressure state to continue circulation until the compressor 101 is stopped.
Fig. 2 is a schematic flow chart of an embodiment of a control method of an air-source heat pump according to an embodiment of the present application, as shown in fig. 2. The air source heat pump control method is not only used for controlling the air source heat pump shown in fig. 1, but any air source heat pump with the same working principle can be controlled by the air source heat pump control method. The air source heat pump control method provided in the present application takes an air source heat pump as an execution subject for explanation, and for simplicity of description, the execution subject is omitted in the present application, and it can be understood that the execution subject of the following technical method is an air source heat pump. The control method of the air source heat pump comprises the following steps 201 to 204:
The demand coefficient is used for indicating the heating demand of the air source heat pump, wherein the heating demand is used for indicating whether the air source heat pump needs to raise the indoor temperature and the return water temperature; for example, when the demand coefficient is equal to 0, it indicates that the air source heat pump does not have a heating demand, that is, the heating demand of the air source heat pump is 0.
The indoor temperature may be an indoor instantaneous temperature or an indoor average temperature within a preset time period. In some embodiments of the present application, the indoor temperature may be collected by an indoor temperature monitoring device, wherein the indoor temperature monitoring device includes, but is not limited to, a temperature sensor and an infrared detection device.
In some embodiments of the present application, in order to improve the applicability and flexibility of the air source heat pump control method, in the demand coefficient calculation, different demand coefficient calculation methods are determined by detecting whether the air source heat pump is provided with an indoor temperature monitoring device, and specifically, the demand coefficient calculation method includes steps a1 to a3:
step a1, judging whether the air source heat pump is provided with an indoor temperature monitoring device.
Step a2, if the air source heat pump is provided with an indoor temperature monitoring device, collecting indoor temperature, and calculating a demand coefficient through the indoor temperature.
And a3, if the air source heat pump is not provided with an indoor temperature monitoring device, acquiring the return water temperature through a return water temperature sensor, and calculating the demand coefficient through the return water temperature.
The preset demand threshold is a preset threshold of the demand coefficient, and in some embodiments of the present application, the preset demand threshold may be 0.
In some embodiments of the application, the demand coefficient is compared with a preset demand threshold, and if the demand coefficient is greater than the preset demand threshold, it is indicated that the indoor temperature and the return water temperature of the air source heat pump need to be raised; if the demand coefficient is smaller than or equal to the preset demand threshold, the air source heat pump does not need to raise the indoor temperature and the return water temperature.
In some embodiments of the present application, the outdoor temperature and the demand coefficient may specifically include steps c1 to c3:
and c1, if the heating requirement exists, calculating the temperature difference between the outdoor temperature and the preset outdoor temperature, and obtaining an initial correction coefficient through the temperature difference.
Step c2, correcting the demand coefficient by multiplying the initial correction coefficient by the demand coefficient to obtain a corrected demand coefficient;
and c3, acquiring the running frequency of the compressor, and adjusting the running frequency of the compressor through the corrected demand coefficient.
And 204, adjusting the running frequency of the compressor through the corrected demand coefficient.
In some embodiments of the present application, when there is a heating demand in an air source heat pump, a preset frequency difference may be corrected by a demand coefficient, and an operating frequency of a compressor is adjusted by using the corrected preset frequency difference, specifically, as shown in fig. 3, fig. 3 is a schematic flow chart of an embodiment of adjusting an operating frequency domain of the compressor in a control method of the air source heat pump according to the embodiments of the present application, where the method for adjusting the operating frequency domain of the compressor includes steps 301 to 303:
In some embodiments of the present application, the operation frequency of the compressor may be a lowest operation frequency of the compressor in a temperature interval where an indoor temperature, an outdoor temperature, a return water temperature, an indoor temperature difference, or a return water temperature difference is located, and the preset frequency difference of the compressor is a frequency difference between the operation frequency of the compressor and a highest operation frequency of the compressor in the temperature interval where the indoor temperature, the outdoor temperature, the return water temperature, the indoor temperature difference, or the return water temperature difference is located. The running frequency of the compressor and the preset frequency difference value of the compressor can be obtained in advance through experiments on the compressor, and can also be obtained through obtaining historical use data of a user.
In some embodiments of the present application, the operating frequency F of the compressor is obtained min And after the difference value delta F is obtained from the preset frequency of the compressor, the target frequency is passed (= ([ delta ] F) and the corrected demand coefficient) + F min A target frequency of the compressor is obtained.
And 303, controlling the compressor to operate according to the target frequency of the compressor.
In the embodiment of the application, when the air source heat pump has a heating demand, the lowest operation frequency and the highest operation frequency of the compressor in the temperature interval of the indoor temperature, the outdoor temperature, the return water temperature, the indoor temperature difference or the return water temperature difference are combined, the highest operation frequency is combined, the lowest operation frequency is adjusted through the corrected demand coefficient, the target frequency of the compressor is obtained, the comfort level of a user is considered while the performance of the compressor is considered, the frequency is adaptively adjusted under the condition that the comfort level of the user is met, and the service life of the compressor is prolonged.
In some embodiments of the present application, adjusting the operating frequency of the compressor may be increasing the operating frequency of the compressor. The operation frequency of the compressor can be the frequency of the compressor corresponding to the temperature interval where the current indoor temperature, the outdoor temperature and the return water temperature are located.
According to the embodiment of the application, the demand coefficient is calculated through the indoor temperature, the running frequency of the compressor is adaptively adjusted through the corrected demand coefficient, the number of times of shutdown of the compressor to the temperature is reduced on the basis that the comfort of a user can be met, the problem of frequent startup and shutdown caused by controlling the frequency of the compressor according to the outlet water temperature is solved, the running cost is reduced, and the running life of a machine is prolonged.
In some embodiments of the present application, in order to reduce the number of times of shutdown of the air source heat pump, in some embodiments of the present application, in order to prolong the life of the compressor, after step 202, if the demand coefficient is less than or equal to the preset demand threshold, the compressor is controlled to operate according to a preset frequency. Wherein the preset frequency is a preset lowest operation frequency of a compressor in the air source heat pump, and the preset frequency may be 20Hz, for example.
In some embodiments of the application, in order to prolong the service life of the compressor, after the compressor is controlled to operate according to the preset frequency, the current indoor temperature or the current return water temperature is obtained, whether the air source heat pump has a heating requirement or not is determined according to the current indoor temperature or the current return water temperature, the compressor is controlled to stop when the heating requirement does not exist, the operation cost is reduced, and meanwhile, the operation life of the machine is prolonged. Specifically, the method comprises the following steps d 1-d 4:
and d1, controlling the compressor to operate for a preset time according to a preset frequency.
And d2, acquiring the current indoor temperature or the current return water temperature, and updating the demand coefficient according to the current indoor temperature or the current return water temperature.
And d3, judging whether the updated demand coefficient is less than or equal to the preset demand threshold.
And d4, if the updated demand coefficient is less than or equal to the preset demand threshold, controlling the compressor to stand by.
In some embodiments of the present application, in order to improve the accuracy of the adjustment of the operating frequency of the compressor and reduce the number of times of shutdown of the compressor, in step 203, an initial correction coefficient may be obtained by calculating a temperature difference between an outdoor temperature and a preset outdoor temperature and calculating a ratio between the temperature difference and the preset temperature difference, and a demand coefficient is corrected by calculating a product between the initial correction coefficient and the demand coefficient, specifically, as shown in fig. 4, fig. 4 is a schematic flow chart of an embodiment of correcting the demand coefficient in the air source heat pump control method provided in the embodiment of the present application, where the illustrated demand coefficient correction method includes steps 401 to 404:
The preset outdoor temperature is a preset outdoor temperature corresponding to the compressor at 0 load, that is, an outdoor temperature when the compressor in the air source heat pump is stopped, and may be 20 ℃.
The preset outdoor temperature difference is a preset temperature difference between an outdoor temperature corresponding to 100% of load of the compressor and a preset temperature, wherein the preset outdoor temperature difference can be obtained in advance through experiments on the compressor, and the preset outdoor temperature difference can also be obtained through obtaining historical use data of a user.
The outdoor temperature is collected by an outdoor temperature sensor.
The temperature difference is calculated by temperature difference = preset outdoor temperature-outdoor temperature.
And 403, calculating a ratio of the temperature difference to the preset outdoor temperature difference to obtain an initial correction coefficient corresponding to the outdoor temperature.
In some embodiments of the present application, if there is a heating demand, an outdoor temperature Tj is collected by an outdoor temperature sensor, a preset outdoor temperature T0 and a preset outdoor temperature difference Δ T are obtained, and an initial correction coefficient is obtained by (T0-Tj)/[ Δ T ].
In the embodiment of the application, the requirement coefficient is corrected through the outdoor temperature, the influence of the outdoor temperature on the compressor is considered, the running frequency of the compressor is adjusted in a self-adaptive mode under the condition that the user comfort is met, the accuracy of adjusting the running frequency of the compressor is improved, and the stop frequency of the compressor is reduced.
In some embodiments of the present application, in order to reduce the hysteresis of water temperature feedback, in the calculation of the demand coefficient, the demand coefficient is calculated by obtaining the indoor temperature or the return water temperature, and combining a preset demand correction value and a preset demand adjustment coefficient, so as to ensure the accuracy of the demand coefficient and reduce the hysteresis of water temperature feedback, specifically, as shown in fig. 4, fig. 5 is a flowchart illustrating an embodiment of calculating the demand coefficient in the control method of the air source heat pump according to the embodiment of the present application, where the illustrated method of calculating the demand coefficient includes steps 501 to 505:
In some embodiments of the present application, the method for obtaining the indoor temperature and the return water temperature is similar to that in step 201, and is not described herein again.
In some embodiments of the present application, the preset target indoor temperature is an indoor temperature set by an indoor temperature line controller or a thermostat. In some embodiments of the present application, the preset target indoor temperature may be an indoor target temperature set by a user, or may be a target indoor temperature corresponding to a default mode.
In some embodiments of the present application, the preset target return water temperature may be a return water temperature set by a water temperature line controller or a thermostat.
In some embodiments of the present application, the indoor temperature difference is obtained by a preset target indoor temperature-indoor temperature calculation; the return water temperature difference is obtained by calculating a preset target return water temperature and a return water temperature.
The preset temperature difference control value is used for standardizing the indoor temperature difference or the return water temperature difference, and exemplarily, the value of the preset temperature difference control value satisfies 0< the value of the preset temperature difference control value <5.
The ratio is calculated through the indoor temperature difference/preset temperature difference control value or the return water temperature difference/preset temperature difference control value.
In some embodiments, the preset demand correction value and the preset demand adjustment coefficient are used to ensure that the demand coefficient value satisfies 0 or more and the demand coefficient is less than or equal to 1, where the preset demand correction value satisfies-2 < the preset demand correction value <2, and the preset demand adjustment coefficient may be 0.5.
And 505, multiplying the demand adjustment coefficient by the sum of the ratio and the demand correction value to obtain a demand coefficient.
In some embodiments of the present application, the demand coefficient may also be determined by a ratio between the indoor temperature difference and a preset temperature difference control value, or by calculating a ratio between the return water temperature difference and a preset temperature difference control value, and specifically includes:
(1) Comparing the ratio between the indoor temperature difference and a preset temperature difference control value or the ratio between the calculated return water temperature difference and a preset temperature difference control value with a first preset threshold value, and if the ratio is smaller than the first preset threshold value, indicating that the indoor temperature is larger than a preset target indoor temperature and the return water temperature is larger than a preset target return water temperature, setting the demand coefficient to be 0; for example, if the ratio is less than-1 when the first predetermined threshold is-1, the demand coefficient is set to 0.
(2) And comparing the ratio between the indoor temperature difference and the preset temperature difference control value or the ratio between the calculated return water temperature difference and the preset temperature difference control value with a second preset threshold, and if the ratio is greater than or equal to the second preset threshold, the indoor temperature is smaller than the preset target indoor temperature, the return water temperature is smaller than the preset target return water temperature, the running frequency of the compressor needs to be increased to increase the indoor temperature and the return water temperature, and the demand coefficient is set to be 1. For example, if the ratio is greater than or equal to 1 when the second preset threshold is 1, the demand factor is set to 1.
(3) And if the ratio meets the condition that the ratio is not more than the first preset threshold value and is less than or equal to the ratio < the second preset threshold value, multiplying the sum of the ratio and the demand correction value by the demand adjustment coefficient to obtain the demand coefficient. For example, taking the first preset threshold value as-1 and the second preset threshold value as 1 as an example, when the ratio is 0.5, the preset demand correction value n and the preset demand regulation coefficient Ki are obtained, and the demand coefficient is obtained through calculation by (n + ratio) × Ki.
In some embodiments of the present application, a corresponding demand coefficient may also be obtained through an indoor temperature difference or a return water temperature difference, and specifically, the method for obtaining a demand coefficient includes steps f1 to f4:
and f1, acquiring the indoor temperature or the return water temperature.
The method for obtaining the indoor temperature or the return water temperature is similar to that in step 201, and is not described herein again.
And f2, calculating the indoor temperature difference between the indoor temperature and a preset target indoor temperature or calculating the return water temperature difference between the return water temperature and the preset target return water temperature.
The method for calculating the indoor temperature difference between the indoor temperature and the preset target indoor temperature or the return water temperature difference between the return water temperature and the preset target return water temperature is similar to that in step 502, and is not described herein again.
And f3, comparing the indoor temperature difference with a preset indoor temperature difference, or comparing the backwater temperature difference with a preset backwater temperature difference.
And f4, if the indoor temperature difference is greater than the preset indoor temperature difference, or the return water temperature difference is greater than the preset return water temperature difference, acquiring the indoor temperature difference or the demand coefficient corresponding to the return water temperature difference.
In some embodiments of the present application, a preset demand coefficient table may be queried to obtain a demand coefficient corresponding to an indoor temperature difference or a return water temperature difference, where the preset demand coefficient table is used to indicate an association relationship between the temperature difference and the demand coefficient. For example, as shown in table one, the table is an embodiment of the preset demand coefficient table provided in the embodiment of the present application, and the preset indoor temperature difference is 5 ℃ and the preset return temperature difference is 5 ℃ are taken as an example for description, and when the indoor temperature difference is 6 ℃ or the return temperature difference is 6 ℃, the corresponding demand coefficient is 1.
In some embodiments of the present application, the demand coefficient is set to 0 when the indoor temperature difference is less than or equal to a preset indoor temperature difference, or the return water temperature difference is less than or equal to a preset return water temperature difference.
Table-preset demand coefficient table
| Indoor temperature difference or backwater temperature difference delta T | Coefficient of demand |
| △T>5℃ | 1 |
| △T≤-5℃ | 0 |
| -5℃<△T≤5℃ | (1+△T/N)*0.5，N∈(0，5) |
It should be noted that the indoor temperature difference or the return water temperature difference and the demand coefficient shown in the table one are only exemplary illustrations, and the numerical range of the indoor temperature difference or the return water temperature difference, the numerical value of the demand coefficient and the calculation method are not limited in the embodiment of the present application.
In some embodiments of the present application, to better explain the air source heat pump control method provided in the embodiments of the present application, the embodiments of the present application also provide an application scenario of air source heat pump control, for example, as shown in fig. 6, fig. 6 is an application scenario embodiment of the air source heat pump control method provided in the embodiments of the present application, and the illustrated air source heat pump control method includes steps g1 to g6:
step g1, after the heating is started, detecting whether an indoor temperature detection device exists in the air source heat pump.
And g2, if the indoor temperature detection device exists, acquiring the return water temperature, the return water temperature difference, the indoor temperature difference and the outdoor temperature, and obtaining an initial demand coefficient K1 and a correction coefficient K2 according to the temperatures.
And g3, if no indoor temperature detection device exists, acquiring the return water temperature, the return water temperature difference and the outdoor temperature, and obtaining an initial demand coefficient K1 and a correction coefficient K2 according to the temperatures.
And g4, judging whether a heating demand exists or not through the initial demand coefficient K1.
And g5, if the heating demand does not exist, controlling the compressor to maintain the standby state, and updating the demand coefficient K1 and the correction coefficient K2.
Step g6, if a heating demand exists, obtaining an adjusted target frequency F by obtaining an initial demand coefficient K1 and a correction coefficient K2, wherein F = (F) max -F min )*K1*K2+F min ，F max And F min The maximum frequency and the minimum frequency corresponding to the backwater temperature, the backwater temperature difference, the indoor temperature difference or the outdoor temperature are respectively.
In the embodiment of the application, the demand coefficient is calculated through the indoor temperature, the running frequency of the compressor is adaptively adjusted through the corrected demand coefficient, and the problem of frequent start and stop caused by controlling the frequency of the compressor according to the outlet water temperature is solved on the basis of meeting the comfort of a user; and whether a heating demand exists or not is judged through the demand coefficient, the adjusting mode of the frequency of the compressor is determined, when the heating demand does not exist, the compressor is controlled to operate according to the preset frequency, the number of times of shutdown of the compressor when the compressor reaches the temperature is reduced, the operating cost is reduced, and meanwhile the operating life of the machine is prolonged.
In order to better implement the air source heat pump control method provided by the embodiment of the present application, on the basis of the air source heat pump control method, the embodiment of the present application further provides an air source heat pump control device, as shown in fig. 7, fig. 7 is a schematic structural diagram of an embodiment of the air source heat pump control device provided by the embodiment of the present application, and the illustrated air source heat pump control device includes:
a coefficient module 701, configured to calculate a demand coefficient according to an indoor temperature or a return water temperature;
a determining module 702, configured to determine whether the demand coefficient is greater than a preset demand threshold;
a correction module 703, configured to correct the demand coefficient if the demand coefficient is greater than a preset demand threshold;
and an adjusting module 704, configured to adjust the operating frequency of the compressor according to the modified demand coefficient.
In some embodiments of the present application, the modification module 703 includes:
an outdoor temperature obtaining unit, configured to obtain an outdoor temperature, a preset outdoor temperature, and a preset outdoor temperature difference if the demand coefficient is greater than a preset demand threshold;
the temperature difference unit is used for calculating the temperature difference between the outdoor temperature and the preset outdoor temperature;
the correction coefficient unit is used for calculating the ratio of the temperature difference to the preset outdoor temperature difference to obtain an initial correction coefficient corresponding to the outdoor temperature;
and the correcting unit is used for performing product operation on the initial correction coefficient and the demand coefficient, correcting the demand coefficient and obtaining the corrected demand coefficient.
In some embodiments of the present application, the adjusting module 704 is further configured to obtain an operating frequency of the compressor and a preset frequency difference of the compressor; multiplying the corrected demand coefficient by a preset frequency difference value of the compressor to obtain a product, and adding the product to the operating frequency of the compressor to obtain a target frequency of the compressor; controlling the compressor to operate at a target frequency of the compressor.
In some embodiments of the present application, the coefficient module 701 further includes:
the acquiring unit is used for acquiring indoor temperature or return water temperature;
the temperature difference unit is used for calculating the indoor temperature difference between the indoor temperature and a preset target indoor temperature or calculating the return water temperature difference between the return water temperature and a preset target return water temperature;
the calculating unit is used for calculating the ratio between the indoor temperature difference and a preset temperature difference control value or calculating the ratio between the return water temperature difference and a preset temperature difference control value;
the coefficient acquisition unit is used for acquiring a preset demand correction value and a preset demand adjustment coefficient;
and the coefficient calculation unit is used for multiplying the demand adjustment coefficient by the sum of the ratio and the demand correction value to obtain a demand coefficient.
In some embodiments of the present application, the coefficient module 701 further includes:
the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring indoor temperature and/or return water temperature;
the temperature difference unit is used for calculating the indoor temperature difference between the indoor temperature and a preset target indoor temperature and/or calculating the return water temperature difference between the return water temperature and a preset target return water temperature;
the comparison unit is used for comparing the indoor temperature difference with a preset indoor temperature difference or comparing the return water temperature difference with a preset return water temperature difference;
and the coefficient unit is used for acquiring the indoor temperature difference or the demand coefficient corresponding to the return water temperature difference if the indoor temperature difference is greater than the preset indoor temperature difference or the return water temperature difference is greater than the preset return water temperature difference.
In some embodiments of the present application, the adjusting module 704 is further configured to control the compressor to operate according to a preset frequency if the demand coefficient is less than or equal to the preset demand threshold.
In some embodiments of the present application, the adjusting module 704 is further configured to control the compressor to operate at a preset frequency for a preset time period;
the coefficient module 701 is further configured to obtain a current indoor temperature or a current return water temperature, and update the demand coefficient according to the current indoor temperature or the current return water temperature;
the determining module 702 is further configured to determine whether the updated demand coefficient is less than or equal to the preset demand threshold;
the adjusting module 704 is further configured to control the compressor to be in a standby state if the updated demand coefficient is less than or equal to the preset demand threshold.
According to the embodiment of the application, the demand coefficient is calculated through the indoor temperature, the running frequency of the compressor is adaptively adjusted through the corrected demand coefficient, on the basis that the comfort of a user can be met, the problem of frequent start and stop caused by controlling the frequency of the compressor according to the outlet water temperature is solved, the number of times of the compressor to stop at the temperature is reduced, the running cost is reduced, and the running life of the machine is prolonged.
An air source heat pump is further provided in an embodiment of the present application, as shown in fig. 8, fig. 8 is a schematic structural diagram of an embodiment of the air source heat pump provided in the embodiment of the present application.
The air source heat pump integrates any one of the air source heat pump control devices provided by the embodiment of the application, and the air source heat pump comprises:
comprises a memory and a processor; the memory stores an application program, and the processor is configured to run the application program in the memory to execute the steps in the air source heat pump control method in any embodiment of the air source heat pump control method to realize the air source heat pump control.
The air-source heat pump may include components such as a processor 801 of one or more processing cores, memory 802 of one or more computer-readable storage media, a power source 803, and an input unit 804. It will be appreciated by those skilled in the art that the air source heat pump arrangement shown in fig. 8 does not constitute a limitation of air source heat pumps and may include more or fewer components than shown, or some components in combination, or a different arrangement of components. Wherein:
the processor 801 is a control center of the air source heat pump, connects various parts of the whole air source heat pump by using various interfaces and lines, and executes various functions and processing data of the air source heat pump by running or executing software programs and/or modules stored in the memory 802 and calling data stored in the memory 802, thereby performing overall monitoring on the air source heat pump. Alternatively, processor 801 may include one or more processing cores; preferably, the processor 801 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 801.
The memory 802 may be used to store software programs and modules, and the processor 801 executes various functional applications and data processing by operating the software programs and modules stored in the memory 802. The memory 802 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the stored data area may store data created according to the use of the air source heat pump, and the like. Further, the memory 802 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 volatile solid state storage device. Accordingly, the memory 802 may also include a memory controller to provide the processor 801 access to the memory 802.
The air-source heat pump further comprises a power supply 803 for supplying power to each component, and preferably, the power supply 803 can be logically connected with the processor 801 through a power management system, so that functions of charging, discharging, power consumption management and the like can be managed through the power management system. The power supply 803 may also include one or more dc or ac power sources, recharging systems, power failure detection circuitry, power converters or inverters, power status indicators, and any like components.
The air-source heat pump may also include an input unit 804, the input unit 804 being operable to receive input numeric or character information and to generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function controls.
Although not shown, the air-source heat pump may further include a display unit, etc., which will not be described in detail herein. Specifically, in this embodiment, the processor 801 in the air source heat pump loads an executable file corresponding to a process of one or more application programs into the memory 802 according to the following instructions, and the processor 801 runs the application programs stored in the memory 802, thereby implementing various functions as follows:
calculating a demand coefficient through the indoor temperature or the backwater temperature;
judging whether the demand coefficient is larger than a preset demand threshold value or not;
if the demand coefficient is larger than a preset demand threshold, correcting the demand coefficient;
and adjusting the running frequency of the compressor through the corrected demand coefficient.
It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be performed by instructions, or by instructions controlling associated hardware, which may be stored in a computer-readable storage medium and loaded and executed by a processor.
To this end, the present invention provides a storage medium, which is a computer-readable storage medium, and the storage medium stores a plurality of instructions, which can be loaded by a processor to execute the steps in any one of the air source heat pump control methods provided by the embodiments of the present invention. For example, the instructions may perform the steps of:
calculating a demand coefficient through the indoor temperature or the backwater temperature;
judging whether the demand coefficient is larger than a preset demand threshold value or not;
if the demand coefficient is larger than a preset demand threshold, correcting the demand coefficient;
and adjusting the running frequency of the compressor through the corrected demand coefficient.
The above operations can be implemented in the foregoing embodiments, and are not described in detail herein.
Wherein the storage medium may include: a Read Only Memory (ROM, chinese: read Only Memory), a Random Access Memory (RAM, random Access Memory, chinese: random Access Memory), a magnetic or optical disk, and the like.
Since the instructions stored in the storage medium can execute the steps in any of the air source heat pump control methods provided in the embodiments of the present invention, the beneficial effects that can be achieved by any of the air source heat pump control methods provided in the embodiments of the present invention can be achieved, and detailed descriptions of the foregoing embodiments are omitted here.
The air source heat pump control method, the air source heat pump control device, the air source heat pump and the storage medium provided by the embodiments of the present invention are described in detail above, and specific examples are applied herein to explain the principle and the embodiment of the present invention, and the description of the above embodiments is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (9)
1. The control method of the air source heat pump is characterized by being applied to the air source heat pump, wherein the air source heat pump comprises a compressor; the method comprises the following steps:
calculating a demand coefficient through the indoor temperature or the return water temperature;
judging whether the demand coefficient is larger than a preset demand threshold value or not;
if the demand coefficient is larger than a preset demand threshold, correcting the demand coefficient;
adjusting the operating frequency of the compressor through the corrected demand coefficient;
if the demand coefficient is greater than a preset demand threshold, modifying the demand coefficient includes: if the demand coefficient is larger than a preset demand threshold, acquiring an outdoor temperature, a preset outdoor temperature and a preset outdoor temperature difference; calculating the temperature difference between the outdoor temperature and the preset outdoor temperature; calculating the ratio of the temperature difference to the preset outdoor temperature difference to obtain an initial correction coefficient corresponding to the outdoor temperature; and performing product operation on the initial correction coefficient and the demand coefficient, and correcting the demand coefficient to obtain a corrected demand coefficient.
2. The air-source heat pump control method of claim 1, wherein said adjusting the operating frequency of the compressor by the modified demand factor comprises:
acquiring the running frequency of the compressor and a preset frequency difference value of the compressor;
multiplying the corrected demand coefficient by a preset frequency difference value of the compressor to obtain a product, and adding the product to the operating frequency of the compressor to obtain a target frequency of the compressor;
controlling the compressor to operate at a target frequency of the compressor.
3. The air-source heat pump control method of claim 1, wherein said calculating a demand coefficient by an indoor temperature or a return water temperature further comprises:
acquiring indoor temperature or return water temperature;
calculating an indoor temperature difference between the indoor temperature and a preset target indoor temperature or calculating a return water temperature difference between the return water temperature and a preset target return water temperature;
calculating the ratio between the indoor temperature difference and a preset temperature difference control value, or calculating the ratio between the return water temperature difference and a preset temperature difference control value;
acquiring a preset demand correction value and a preset demand regulation coefficient;
and multiplying the demand adjustment coefficient by the sum of the ratio and the demand correction value to obtain a demand coefficient.
4. The air-source heat pump control method of claim 1, wherein said calculating a demand coefficient by an indoor temperature or a return water temperature further comprises:
acquiring indoor temperature or return water temperature;
calculating an indoor temperature difference between the indoor temperature and a preset target indoor temperature or calculating a return water temperature difference between the return water temperature and a preset target return water temperature;
comparing the indoor temperature difference with a preset indoor temperature difference, or comparing the return water temperature difference with a preset return water temperature difference;
if the indoor temperature difference is larger than the preset indoor temperature difference, or the return water temperature difference is larger than the preset return water temperature difference, then acquiring the indoor temperature difference or the demand coefficient corresponding to the return water temperature difference.
5. The air-source heat pump control method of any one of claims 1 to 4, wherein after determining whether the demand coefficient is greater than a preset demand threshold, the method further comprises:
and if the demand coefficient is less than or equal to the preset demand threshold, controlling the compressor to operate according to a preset frequency.
6. The air-source heat pump control method of claim 5, wherein after controlling the compressor to operate at a predetermined frequency if the demand factor is less than or equal to the predetermined demand threshold, the method comprises:
controlling the compressor to operate according to a preset frequency for a preset time;
acquiring the current indoor temperature or the current backwater temperature, and updating the demand coefficient according to the current indoor temperature or the current backwater temperature;
judging whether the updated demand coefficient is less than or equal to the preset demand threshold value;
and if the updated demand coefficient is less than or equal to the preset demand threshold, controlling the compressor to stand by.
7. An air-source heat pump control apparatus, characterized by comprising:
the coefficient module is used for calculating a demand coefficient through the indoor temperature or the return water temperature;
the judging module is used for judging whether the demand coefficient is larger than a preset demand threshold value or not;
the correction module is used for correcting the demand coefficient if the demand coefficient is larger than a preset demand threshold;
the adjusting module is used for adjusting the running frequency of the compressor through the corrected demand coefficient;
the correction module comprises: the outdoor temperature acquisition unit is used for acquiring outdoor temperature, preset outdoor temperature and preset outdoor temperature difference if the demand coefficient is larger than a preset demand threshold; a temperature difference unit for calculating a temperature difference between the outdoor temperature and the preset outdoor temperature; the correction coefficient unit is used for calculating the ratio of the temperature difference to the preset outdoor temperature difference to obtain an initial correction coefficient corresponding to the outdoor temperature; and the correcting unit is used for performing product operation on the initial correction coefficient and the demand coefficient, correcting the demand coefficient and obtaining the corrected demand coefficient.
8. An air-source heat pump, characterized in that it comprises: comprises a memory and a processor; the memory stores an application program, and the processor is used for running the application program in the memory to execute the operation in the air source heat pump control method according to any one of claims 1 to 6.
9. A storage medium storing instructions adapted to be loaded by a processor to perform the steps of the air-source heat pump control method of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110694339.6A CN113432354B (en) | 2021-06-22 | 2021-06-22 | Air source heat pump control method and device, air source heat pump and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110694339.6A CN113432354B (en) | 2021-06-22 | 2021-06-22 | Air source heat pump control method and device, air source heat pump and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113432354A CN113432354A (en) | 2021-09-24 |
| CN113432354B true CN113432354B (en) | 2022-11-15 |
Family
ID=77757197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110694339.6A Active CN113432354B (en) | 2021-06-22 | 2021-06-22 | Air source heat pump control method and device, air source heat pump and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113432354B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803909B (en) * | 2021-09-27 | 2022-11-08 | 广东美的制冷设备有限公司 | Control method, system and device of air source heat pump and storage medium |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106225362B (en) * | 2016-08-02 | 2019-06-14 | 顿汉布什(中国)工业有限公司 | A kind of control method and system of Double-head centrifugal refrigerating machines |
| CN106382728B (en) * | 2016-09-30 | 2019-11-01 | 广东美的制冷设备有限公司 | A kind of control method of convertible frequency air-conditioner, device and convertible frequency air-conditioner |
| CN108592342B (en) * | 2018-05-02 | 2020-09-01 | 广东美的制冷设备有限公司 | Frequency control method and frequency control device, multi-split air conditioner and storage medium |
| CN109237751B (en) * | 2018-07-25 | 2021-06-11 | 广东芬尼能源技术有限公司 | Method, device, equipment and medium for quickly achieving unit target capacity |
| CN112013454B (en) * | 2019-05-30 | 2022-03-22 | 青岛海尔新能源电器有限公司 | Control method for air source heat pump heating unit |
| CN110160246A (en) * | 2019-05-30 | 2019-08-23 | 广东美的暖通设备有限公司 | Operation method, fresh air conditioner and the computer readable storage medium of compressor |
| CN110779144B (en) * | 2019-10-25 | 2020-09-22 | 珠海格力电器股份有限公司 | Variable frequency air conditioner control method and device and variable frequency air conditioner |
-
2021
- 2021-06-22 CN CN202110694339.6A patent/CN113432354B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113432354A (en) | 2021-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108626923B (en) | Control structure and control method of air conditioning system | |
| CN108151250B (en) | Variable frequency air conditioner control method and device | |
| CN111207481A (en) | Water multi-connected system compressor frequency-up-down control method, storage medium and air conditioner | |
| CN110822676B (en) | Control method, control device, air conditioner, and computer-readable storage medium | |
| CN109556241A (en) | A kind of water system air-conditioner control method | |
| CN109539380B (en) | Method for controlling frequency of compressor of heat pump water heater | |
| CN111765599A (en) | Optimization method of air conditioner control strategy, processor and memory | |
| CN112361537B (en) | Multi-split air conditioning system and oil return control method and device thereof, storage medium and processor | |
| CN113432354B (en) | Air source heat pump control method and device, air source heat pump and storage medium | |
| CN112629022B (en) | Multi-split water heater control method and device and multi-split water heater | |
| CN113587384B (en) | Control method and device of air conditioner, air conditioner and storage medium | |
| CN113339947B (en) | Control method and device of air conditioner, air conditioner and storage medium | |
| JP6921039B2 (en) | Unit control device and program | |
| CN112665132B (en) | Air conditioning system, energy-saving control method and device for cooling side of air conditioning system and controller | |
| CN110375456B (en) | Auxiliary heat source control method and device for heat pump hot water heating unit | |
| CN114234372B (en) | Control method and device of modular multi-split air conditioner, multi-split air conditioner system and storage medium | |
| CN110779232A (en) | Control method and device for multi-connected cold and hot water unit and multi-connected cold and hot water unit | |
| CN115930408A (en) | Refrigeration control method and device for water chilling unit, water chilling unit and storage medium | |
| CN111059701B (en) | Energy-saving control method and device, storage medium and water multi-connected system | |
| CN110260498B (en) | Compressor frequency adjusting method and device and air conditioning system | |
| CN114623565A (en) | Multi-split air conditioning system and control method and control device thereof | |
| CN113865016A (en) | Air conditioning system control method and device and air conditioning system | |
| CN113465185A (en) | Heat pump initial frequency control method and system and air source heat pump | |
| CN107942771B (en) | Data center energy supply control system and method | |
| CN114413456B (en) | Group control method and equipment for chilled water system of central air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |