CN113758017A - Initial opening degree calculation method, device, equipment and medium for electronic expansion valve - Google Patents
Initial opening degree calculation method, device, equipment and medium for electronic expansion valve Download PDFInfo
- Publication number
- CN113758017A CN113758017A CN202111032005.9A CN202111032005A CN113758017A CN 113758017 A CN113758017 A CN 113758017A CN 202111032005 A CN202111032005 A CN 202111032005A CN 113758017 A CN113758017 A CN 113758017A
- Authority
- CN
- China
- Prior art keywords
- temperature
- expansion valve
- electronic expansion
- opening degree
- initial opening
- 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.)
- Pending
Links
- 238000004364 calculation method Methods 0.000 title claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 89
- 238000001704 evaporation Methods 0.000 claims abstract description 82
- 230000008020 evaporation Effects 0.000 claims abstract description 79
- 239000003507 refrigerant Substances 0.000 claims abstract description 63
- 230000005494 condensation Effects 0.000 claims abstract description 60
- 238000009833 condensation Methods 0.000 claims abstract description 60
- 238000000034 method Methods 0.000 claims abstract description 36
- 238000012937 correction Methods 0.000 claims description 36
- 238000004590 computer program Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 abstract description 11
- 238000010586 diagram Methods 0.000 description 6
- 238000010977 unit operation Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 238000001595 flow curve Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000011545 laboratory measurement Methods 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a method, a device, equipment and a medium for calculating the initial opening of an electronic expansion valve, wherein the method for calculating the initial opening of the electronic expansion valve comprises the following steps: acquiring parameters of evaporation temperature, condensation temperature and a compressor; determining refrigerant mass flow according to the evaporation temperature, the condensation temperature and parameters of the compressor; and determining the initial opening degree of the electronic expansion valve according to the preset relation curve of the refrigerant mass flow and the opening degree of the electronic expansion valve. And furthermore, the initial opening degree of the electronic expansion valve at each water temperature and environment temperature can be calculated without carrying out calibration test on each water temperature and environment temperature in a laboratory.
Description
Technical Field
The embodiment of the invention relates to the technical field of heat pump water heaters, in particular to a method, a device, equipment and a medium for calculating the initial opening of an electronic expansion valve.
Background
At present, an initial opening degree of an electronic expansion valve needs to be given in an initial state of starting of a heat pump water heater system, the initial opening degree changes along with the change of ambient temperature and water temperature, different initial opening degrees need to be adopted for different ambient temperatures and water temperatures, the reliability of the initial operation of the system can be ensured, but the determination of the current initial opening degree needs to test the unit operation states under different water temperatures and different environment temperature states, the opening degree value of the electronic expansion valve which is wanted by a user can be obtained, the test wastes experimental resources, and each water temperature and each ambient temperature can not be tested in the actual test process, so that the setting of the current initial opening degree is not suitable for the full working condition and the water temperature range, and the reliability of the unit operation can be influenced finally.
Disclosure of Invention
The invention provides a method, a device, equipment and a medium for calculating the initial opening of an electronic expansion valve, so that the initial opening of the electronic expansion valve at each water temperature and environment temperature can be calculated without carrying out calibration test on each water temperature and environment temperature in a laboratory.
In order to achieve the above object, a first embodiment of the present invention provides a method for calculating an initial opening degree of an electronic expansion valve, including the following steps:
acquiring parameters of evaporation temperature, condensation temperature and a compressor;
determining refrigerant mass flow according to the evaporation temperature, the condensation temperature and parameters of the compressor;
and determining the initial opening degree of the electronic expansion valve according to the preset relation curve of the refrigerant mass flow and the opening degree of the electronic expansion valve.
According to an embodiment of the present invention, the acquiring of the evaporation temperature, the condensation temperature, and the parameter of the compressor includes:
acquiring an ambient temperature, and determining the evaporation temperature according to the relation between the ambient temperature and the evaporation temperature;
acquiring water temperature, and determining the condensation temperature according to the relation between the water temperature and the condensation temperature;
and acquiring the parameters of the compressor through a table look-up.
According to an embodiment of the present invention, after determining the evaporation temperature according to the relationship between the ambient temperature and the evaporation temperature, further comprising:
and correcting the evaporation temperature according to a first preset corresponding relation, wherein the first corresponding relation is the corresponding relation between the ambient temperature and a first correction value.
According to an embodiment of the present invention, after determining the condensing temperature according to the relationship between the water temperature and the condensing temperature, further comprising:
and correcting the condensation temperature according to a second preset corresponding relation, wherein the second corresponding relation is the corresponding relation between the water temperature and a second correction value.
According to one embodiment of the invention, said determining a refrigerant mass flow based on said evaporating temperature, said condensing temperature and said compressor parameter comprises:
according to the formula, the method comprises the following steps of,
M＝P1+P2*x+P3*y+P4*x2+P5*x*y+P6*y2+P7*x3+P8*x2*y+P9*x*y2+P10*y3calculating the refrigerant mass flow, P in the formula1-P10Is a parameter of the compressor; x is the evaporation temperature, y is the condensation temperature, and M is the refrigerant mass flow.
In order to achieve the above object, a second embodiment of the present invention provides an initial opening degree calculation device for an electronic expansion valve, including:
the acquisition module is used for acquiring the evaporation temperature, the condensation temperature and the parameters of the compressor;
the first determination module is used for determining the refrigerant mass flow according to the evaporation temperature, the condensation temperature and the parameters of the compressor;
and the second determining module is used for determining the initial opening degree of the electronic expansion valve according to a preset relation curve of the refrigerant mass flow and the opening degree of the electronic expansion valve.
According to one embodiment of the invention, the obtaining module comprises:
the first acquisition unit is used for acquiring the ambient temperature and determining the evaporation temperature according to the relation between the ambient temperature and the evaporation temperature;
the second acquisition unit is used for acquiring water temperature and determining the condensation temperature according to the relation between the water temperature and the condensation temperature;
and the third acquisition unit is used for acquiring the parameters of the compressor through table lookup.
According to an embodiment of the present invention, the initial opening degree calculation means of the electronic expansion valve further includes:
the first correction module is used for correcting the evaporation temperature according to a first preset corresponding relation, wherein the first corresponding relation is a corresponding relation between the ambient temperature and a first correction value.
According to an embodiment of the present invention, the initial opening degree calculation means of the electronic expansion valve further includes:
and the second correction module is used for correcting the condensation temperature according to a second preset corresponding relation, wherein the second corresponding relation is the corresponding relation between the water temperature and a second correction value.
According to an embodiment of the present invention, the initial opening degree calculation means of the electronic expansion valve further includes:
a refrigerant mass flow calculation module for calculating, according to a formula,
M＝P1+P2*x+P3*y+P4*x2+P5*x*y+P6*y2+P7*x3+P8*x2*y+P9*x*y2+P10*y3calculating the refrigerant mass flow, P in the formula1-P10Is a parameter of the compressor; x is the evaporation temperature, y is the condensation temperature, and M is the refrigerant mass flow.
In order to achieve the above object, a third aspect of the present invention provides electronic equipment for calculating an initial opening degree of an electronic expansion valve, the electronic equipment comprising:
one or more processors;
storage means for storing one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors implement the method for calculating the initial opening degree of the electronic expansion valve as described above.
To achieve the above object, a fourth aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor, implements the method for calculating an initial opening degree of an electronic expansion valve as described above.
According to the method, the device, the equipment and the medium for calculating the initial opening degree of the electronic expansion valve, which are provided by the embodiment of the invention, the method for calculating the initial opening degree of the electronic expansion valve comprises the following steps: acquiring parameters of evaporation temperature, condensation temperature and a compressor; determining refrigerant mass flow according to the evaporation temperature, the condensation temperature and parameters of the compressor; and determining the initial opening degree of the electronic expansion valve according to the preset relation curve of the refrigerant mass flow and the opening degree of the electronic expansion valve. And furthermore, the initial opening degree of the electronic expansion valve at each water temperature and environment temperature can be calculated without carrying out calibration test on each water temperature and environment temperature in a laboratory.
Drawings
Fig. 1 is a flowchart of a method for calculating an initial opening degree of an electronic expansion valve according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for calculating an initial opening degree of an electronic expansion valve according to an embodiment of the present invention;
fig. 3 is a graph showing a relationship between a refrigerant mass flow and an initial opening degree of an electronic expansion valve in a method for calculating the initial opening degree of the electronic expansion valve according to an embodiment of the present invention;
fig. 4 is a block diagram of an initial opening calculation device of an electronic expansion valve according to an embodiment of the present invention;
FIG. 5 is a block diagram of an electronic device for calculating an initial opening of an electronic expansion valve according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a heat pump water heater in the prior art.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the prior art, different water temperatures and ambient temperatures correspond to different initial opening values of the electronic expansion valve, and the initial opening of the electronic expansion valve of the hot water pump is calibrated in a laboratory, but because the calibration cannot exhaust all the water temperatures and the ambient temperatures, the calibrated water temperatures and the ambient temperatures are discrete, for example, when the water temperature is 5 ℃ and the ambient temperature is 10 ℃, the calibrated water temperature corresponds to the initial opening of the electronic expansion valve, the water temperature is 15 ℃ and the ambient temperature is 25 ℃, the initial opening of the electronic expansion valve corresponds to the initial opening of the electronic expansion valve, but in the process that the water temperature is changed from 5 ℃ to 15 ℃, the ambient temperature is changed from 10 ℃ to 25 ℃, and the electronic expansion valve is not initially opened correspondingly. The initial opening degree of the former electronic expansion valve may be selected when the water temperature is 10 ℃ or lower and the ambient temperature is 17.5 ℃ or lower, and the initial opening degree of the latter electronic expansion valve may be selected when the water temperature is 10 ℃ or higher and the ambient temperature is 17.5 ℃ or higher. Furthermore, the water temperature ranges from 5 ℃ to 10 ℃, the initial opening degree of the electronic expansion valve when the ambient temperature ranges from 10 ℃ to 17.5 ℃ corresponds to the water temperature of 5 ℃, the initial opening degree of the electronic expansion valve when the ambient temperature is 10 ℃, the water temperature ranges from 10 ℃ to 15 ℃, the initial opening degree of the electronic expansion valve when the ambient temperature ranges from 17.5 ℃ to 25 ℃ corresponds to the water temperature of 15 ℃, and the ambient temperature is 25 ℃. Therefore, the range of the water temperature and the environment temperature basically corresponds to the initial opening value of the electronic expansion valve, but actually the initial opening value of the electronic valve of the heat pump water heater is different under different water temperatures and environment temperatures, and if the initial opening value of the electronic valve is used, the reliability of the unit operation can be influenced.
In order to solve the above technical problem, an embodiment of the present invention provides a method for calculating an initial opening of an electronic expansion valve, which can calculate the initial opening of the electronic expansion valve at each water temperature and ambient temperature without performing calibration tests on each water temperature and ambient temperature in a laboratory.
Fig. 1 is a flowchart of a method for calculating an initial opening degree of an electronic expansion valve according to an embodiment of the present invention. As shown in fig. 1, the method comprises the steps of:
s101, acquiring evaporation temperature, condensation temperature and parameters of a compressor;
according to an embodiment of the present invention, as shown in fig. 2, the acquiring of the evaporating temperature, the condensing temperature and the parameters of the compressor includes:
s1011, obtaining an ambient temperature, and determining the evaporation temperature according to the relation between the ambient temperature and the evaporation temperature;
it should be noted that the relationship between the ambient temperature and the evaporation temperature satisfies: x is Tw-8, wherein x is the evaporation temperature, Tw is the ambient temperature, and the evaporation temperature can be obtained after the ambient temperature is obtained. Wherein, the ambient temperature can be obtained by a temperature sensor.
S1012, acquiring water temperature, and determining the condensation temperature according to the relation between the water temperature and the condensation temperature;
it should be noted that the relationship between the water temperature and the condensation temperature satisfies: t1, wherein y is the condensation temperature, and T1 is the water temperature, and further, the condensation temperature can be obtained after obtaining the water temperature, and the water temperature can be obtained by the temperature sensor.
And S1013, obtaining the parameters of the compressor through table lookup.
It should be noted that each type of compressor has ten parameters corresponding to the compressor, and the ten parameters of the compressor can be obtained by looking up a table, where the parameters of the compressor are performance parameters (mass flow parameters) of the compressor, and when the model of the compressor is given, all the ten performance parameters are determined.
S102, determining the mass flow of the refrigerant according to the evaporation temperature, the condensation temperature and the parameters of the compressor;
according to one embodiment of the invention, said determining a refrigerant mass flow based on said evaporating temperature, said condensing temperature and said compressor parameter comprises:
according to the formula, the method comprises the following steps of,
M＝P1+P2*x+P3*y+P4*x2+P5*x*y+P6*y2+P7*x3+P8*x2*y+P9*x*y2+P10*y3calculating the refrigerant mass flow, P in the formula1-P10Is a parameter of the compressor; x is the evaporation temperature, y is the condensation temperature, and M is the refrigerant mass flow.
That is, after the evaporation temperature, the condensation temperature, and the compressor ten parameters are acquired from step S101, the refrigerant mass flow rate may be calculated by substituting the foregoing formula.
S103, determining the initial opening degree of the electronic expansion valve according to the preset relation curve of the refrigerant mass flow and the opening degree of the electronic expansion valve.
It can be understood that there is a preset relationship curve between the refrigerant mass flow and the opening degree of the electronic expansion valve, and the preset relationship curve can be calibrated in advance, and the relationship between the refrigerant mass flow and the opening degree of the electronic expansion valve is easier to calibrate than the relationship between the water temperature and the ambient temperature and the initial opening degree of the electronic expansion valve. And, the refrigerant mass flow rate is continuous as the electronic expansion valve opening degree changes.
Therefore, the refrigerant mass flow can be calculated through the evaporation temperature, the condensation temperature and the parameters of the compressor, and the initial opening value of the corresponding electronic expansion valve is obtained according to the preset relation curve between the refrigerant mass flow and the opening of the electronic expansion valve.
For example, the water temperature T1 is 50 ℃ and the ambient temperature Tw is 14 ℃, as exemplified by the Meizhi PA108M1C-4DZDE2 compressor, the ten parameters of which are shown in Table 1:
TABLE 1 compressor Ten parameter List
| Parameter(s) | Flow Rate(kg/h) |
| P1 | 4.00736079E+01 |
| P2 | 1.20642586E+00 |
| P3 | 2.04145824E-01 |
| P4 | 3.94607787E-02 |
| P5 | 1.95961131E-02 |
| P6 | -6.75940325E-03 |
| P7 | 3.70266101E-04 |
| P8 | -2.24958681E-04 |
| P9 | -2.85439351E-04 |
| P10 | 4.09192350E-05 |
Furthermore, the evaporation temperature x-Tw-8 is 6 ℃, y-T1 is 50 ℃, the ten parameters P1-P10 in the above table take two decimal places, and the two decimal places are substituted into the formula:
M＝P1+P2*x+P3*y+P4*x2+P5*x*y+P6*y2+P7*x3+P8*x2*y+P9*x*y2+P10*y3the mass flow rate M of the refrigerant was found to be 48.43 kg/h.
Then, according to a preset relationship curve between the refrigerant mass flow and the opening degree of the electronic expansion valve, the initial opening degree (as shown in fig. 3) of the electronic expansion valve corresponding to the refrigerant mass flow M can be obtained as 180P. Therefore, corresponding refrigerant mass flow can be calculated at different water temperatures and ambient temperatures, the initial opening degree of the electronic expansion valve is found according to the preset relation curve, the water temperatures and the ambient temperatures do not need to be calibrated one by one, and the laboratory measurement process is reduced.
According to an embodiment of the present invention, after determining the evaporation temperature according to the relationship between the ambient temperature and the evaporation temperature, further comprising:
and correcting the evaporation temperature according to a first preset corresponding relation, wherein the first corresponding relation is the corresponding relation between the ambient temperature and a first correction value.
TABLE 2 evaporation temperature correction value Table
That is to say, the first preset corresponding relationship is the corresponding relationship between the ambient temperature and the first correction value, as shown in table 2, the evaporation temperature x is Tw-8+ SHTE, and after the evaporation temperature is obtained, the first correction value can be obtained according to the interval where the current ambient temperature is located, so as to correct the evaporation temperature, so that the evaporation temperature is closer to the true value. For example, when the ambient temperature is-15 deg.C, the evaporation temperature x is-23 deg.C, and x is-20 deg.C after correction. The correction values may be calibrated in advance based on empirical values, experimental values, and the like.
According to an embodiment of the present invention, after determining the condensing temperature according to the relationship between the water temperature and the condensing temperature, further comprising:
and correcting the condensation temperature according to a second preset corresponding relation, wherein the second corresponding relation is the corresponding relation between the water temperature and a second correction value.
TABLE 3 condensing temperature correction value Table
That is, the second preset corresponding relationship is the corresponding relationship between the water temperature and the second correction value, as shown in table 3, the condensing temperature x is T1+ SHTC, and after the condensing temperature is obtained, the second correction value can be obtained according to the section where the current water temperature is located, so as to correct the condensing temperature, so that the condensing temperature is closer to the true value. For example, when the water temperature is-15 ℃, the condensation temperature y is-15 ℃, and x is-5 ℃ after correction. The correction values may be calibrated in advance based on empirical values, experimental values, and the like.
It should be noted that the present invention is not limited to this, and only the evaporation temperature, only the condensation temperature, or both the evaporation temperature and the condensation temperature may be corrected. And finally, calculating the refrigerant mass flow through a refrigerant mass flow calculation formula according to the corrected evaporation temperature, condensation temperature and compressor parameters, and acquiring the initial opening degree of the electronic expansion valve according to the relationship between the refrigerant mass flow and the initial opening degree of the electronic expansion valve.
Therefore, the initial opening degree of the unit during starting can be calculated according to the environment temperature and the water temperature, different environment temperatures and different water temperatures can be calculated, the initial opening degree of the unit can be calculated without testing, the testing time can be greatly reduced, the state of the unit can be more accurately reflected through mass flow calculation, the full working condition range can be covered, and the reliability of the unit operation can be directly influenced by the accuracy of the initial opening degree.
Fig. 4 is a block diagram of an initial opening calculation device of an electronic expansion valve according to an embodiment of the present invention. As shown in fig. 4, the initial opening degree calculation apparatus 100 for an electronic expansion valve includes:
an obtaining module 101, configured to obtain an evaporation temperature, a condensation temperature, and a parameter of a compressor;
according to one embodiment of the invention, the obtaining module comprises:
the first acquisition unit is used for acquiring the ambient temperature and determining the evaporation temperature according to the relation between the ambient temperature and the evaporation temperature;
it should be noted that the relationship between the ambient temperature and the evaporation temperature satisfies: x is Tw-8, wherein x is the evaporation temperature, Tw is the ambient temperature, and the evaporation temperature can be obtained after the ambient temperature is obtained. Wherein, the ambient temperature can be obtained by a temperature sensor.
The second acquisition unit is used for acquiring water temperature and determining the condensation temperature according to the relation between the water temperature and the condensation temperature;
it should be noted that the relationship between the water temperature and the condensation temperature satisfies: t1, wherein y is the condensation temperature, and T1 is the water temperature, and further, the condensation temperature can be obtained after obtaining the water temperature, and the water temperature can be obtained by the temperature sensor.
And the third acquisition unit is used for acquiring the parameters of the compressor through table lookup.
It should be noted that each type of compressor has ten parameters corresponding to the compressor, and the ten parameters of the compressor can be obtained through table lookup.
A first determining module 102, configured to determine a refrigerant mass flow according to the evaporation temperature, the condensation temperature, and a parameter of the compressor;
according to an embodiment of the present invention, the initial opening degree calculation means of the electronic expansion valve further includes:
a refrigerant mass flow calculation module for calculating, according to a formula,
M＝P1+P2*x+P3*y+P4*x2+P5*x*y+P6*y2+P7*x3+P8*x2*y+P9*x*y2+P10*y3calculating the refrigerant mass flow, P in the formula1-P10Is a parameter of the compressor; x is the evaporation temperature, y is the condensation temperature, and M is the refrigerant mass flow.
And the second determining module 103 is configured to determine an initial opening degree of the electronic expansion valve according to a preset relationship curve between the refrigerant mass flow and the opening degree of the electronic expansion valve.
It can be understood that there is a preset relationship curve between the refrigerant mass flow and the opening degree of the electronic expansion valve, and the preset relationship curve can be calibrated in advance, and the relationship between the refrigerant mass flow and the opening degree of the electronic expansion valve is easier to calibrate than the relationship between the water temperature and the ambient temperature and the initial opening degree of the electronic expansion valve. And, the refrigerant mass flow rate is continuous as the electronic expansion valve opening degree changes.
Therefore, the refrigerant mass flow can be calculated through the evaporation temperature, the condensation temperature and the parameters of the compressor, and the initial opening value of the corresponding electronic expansion valve is obtained according to the preset relation curve between the refrigerant mass flow and the opening of the electronic expansion valve.
For example, the water temperature T1 is 50 ℃ and the ambient temperature Tw is 14 ℃, as exemplified by the Meizhi PA108M1C-4DZDE2 compressor, the ten parameters of which are shown in Table 1:
TABLE 1 compressor Ten parameter List
Furthermore, the evaporation temperature x-Tw-8 is 6 ℃, y-T1 is 50 ℃, the ten parameters P1-P10 in the above table take two decimal places, and the two decimal places are substituted into the formula:
M＝P1+P2*x+P3*y+P4*x2+P5*x*y+P6*y2+P7*x3+P8*x2*y+P9*x*y2+P10*y3the mass flow rate M of the refrigerant was found to be 48.43 kg/h.
Then, according to a preset relationship curve between the refrigerant mass flow and the opening degree of the electronic expansion valve, the initial opening degree (as shown in fig. 2) of the electronic expansion valve corresponding to the refrigerant mass flow M can be obtained as 180P. Therefore, corresponding refrigerant mass flow can be calculated at different water temperatures and ambient temperatures, the initial opening degree of the electronic expansion valve is found according to the preset relation curve, the water temperatures and the ambient temperatures do not need to be calibrated one by one, and the laboratory measurement process is reduced.
Therefore, according to the water temperature and the environment before the unit is started, the refrigerant mass flow of the refrigeration system during starting is calculated, the refrigerant mass flow corresponds to the flow curve of the electronic expansion valve, the refrigerant mass flow of the refrigeration system corresponds to the flow curve and the opening curve of the electronic expansion valve, the opening value of the electronic expansion valve under the current refrigerant mass flow can be obtained, the value is used as the initial opening of the unit during starting, a large number of repeated experimental tests can be avoided, the corresponding relation of the opening of the electronic expansion valve can be accurately reflected through the mass flow of the refrigeration system, and the corresponding initial opening can be achieved at any ambient temperature and at any water temperature.
According to an embodiment of the present invention, the initial opening degree calculation means of the electronic expansion valve further includes:
the first correction module is used for correcting the evaporation temperature according to a first preset corresponding relation, wherein the first corresponding relation is a corresponding relation between the ambient temperature and a first correction value.
TABLE 2 evaporation temperature correction value Table
That is to say, the first preset corresponding relationship is the corresponding relationship between the ambient temperature and the first correction value, as shown in table 2, the evaporation temperature x is Tw-8+ SHTE, and after the evaporation temperature is obtained, the first correction value can be obtained according to the interval where the current ambient temperature is located, so as to correct the evaporation temperature, so that the evaporation temperature is closer to the true value. For example, when the ambient temperature is-15 deg.C, the evaporation temperature x is-23 deg.C, and x is-20 deg.C after correction. The correction values may be calibrated in advance based on empirical values, experimental values, and the like.
According to an embodiment of the present invention, the initial opening degree calculation means of the electronic expansion valve further includes:
and the second correction module is used for correcting the condensation temperature according to a second preset corresponding relation, wherein the second corresponding relation is the corresponding relation between the water temperature and a second correction value.
TABLE 3 condensing temperature correction value Table
That is, the second preset corresponding relationship is the corresponding relationship between the water temperature and the second correction value, as shown in table 3, the condensing temperature x is T1+ SHTC, and after the condensing temperature is obtained, the second correction value can be obtained according to the section where the current water temperature is located, so as to correct the condensing temperature, so that the condensing temperature is closer to the true value. For example, when the water temperature is-15 ℃, the condensation temperature y is-15 ℃, and x is-5 ℃ after correction. The correction values may be calibrated in advance based on empirical values, experimental values, and the like.
It should be noted that the present invention is not limited to this, and only the evaporation temperature, only the condensation temperature, or both the evaporation temperature and the condensation temperature may be corrected. And finally, calculating the refrigerant mass flow through a refrigerant mass flow calculation formula according to the corrected evaporation temperature, condensation temperature and compressor parameters, and acquiring the initial opening degree of the electronic expansion valve according to the relationship between the refrigerant mass flow and the initial opening degree of the electronic expansion valve.
Fig. 5 is a block diagram of an electronic device for calculating an initial opening degree of an electronic expansion valve according to an embodiment of the present invention. As shown in fig. 5, the electronic device 400 includes:
one or more processors 401;
a storage 402 for storing one or more programs;
when the one or more programs are executed by the one or more processors 401, the one or more processors 401 may cause the one or more processors 401 to implement the method of calculating the initial opening degree of the electronic expansion valve as described above.
As shown in fig. 5, the electronic device 400 includes a processor 401, a storage device 402, an input device 403, and an output device 404; the number of the processors 401 in the device may be one or more, and one processor 401 is taken as an example in fig. 5; the processor 401, the storage means 402, the input means 403 and the output means 404 in the device may be connected by a bus or other means, as exemplified by a bus in fig. 5.
The storage device 402 is a computer-readable storage medium, and can be used to store software programs, computer-executable programs, and modules, such as program instructions corresponding to the method for calculating the initial opening degree of the electronic expansion valve according to the embodiment of the present invention. The processor 401 executes various functional applications and data processing of the device by running software programs, instructions and modules stored in the storage device 402, so as to realize the above-mentioned method for calculating the initial opening degree of the electronic expansion valve.
The storage device 402 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the storage 402 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the storage 402 may further include memory located remotely from the processor 401, which may be connected to the device over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 403 is operable to receive an inputted instruction request and generate key signal inputs related to the setting and function control of the apparatus. The output device 404 may include a display device such as a display screen.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by the processor 401, implements the method for calculating the initial opening degree of the electronic expansion valve.
That is, embodiments of the present invention provide a storage medium containing computer-executable instructions, where the computer-executable instructions can perform operations related to a method for calculating an initial opening degree of an electronic expansion valve according to any embodiment of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
Fig. 6 is a schematic structural diagram of a heat pump water heater in the prior art. As shown in fig. 6, the heat pump water heater comprises a four-way valve 201, a compressor 202, an evaporator 203, an electronic expansion valve 204 and a water tank 205, and the working principle of the heat pump water heater is the same as that of the prior art. An ambient temperature detection sensor is provided in the evaporator 203, and a water temperature detection sensor is provided in the water tank 205. Wherein, the water temperature detection sensor detects the temperature of the inlet water.
In summary, according to the method, the apparatus, the device and the medium for calculating the initial opening degree of the electronic expansion valve provided by the embodiments of the present invention, the method for calculating the initial opening degree of the electronic expansion valve includes the following steps: acquiring parameters of evaporation temperature, condensation temperature and a compressor; determining refrigerant mass flow according to the evaporation temperature, the condensation temperature and parameters of the compressor; and determining the initial opening degree of the electronic expansion valve according to the preset relation curve of the refrigerant mass flow and the opening degree of the electronic expansion valve. Furthermore, the initial opening degree of the electronic expansion valve at each water temperature and environment temperature can be calculated without carrying out calibration test on each water temperature and environment temperature in a laboratory, and the running reliability of the unit is improved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An initial opening calculation method of an electronic expansion valve is characterized by comprising the following steps:
acquiring parameters of evaporation temperature, condensation temperature and a compressor;
determining refrigerant mass flow according to the evaporation temperature, the condensation temperature and parameters of the compressor;
and determining the initial opening degree of the electronic expansion valve according to the preset relation curve of the refrigerant mass flow and the opening degree of the electronic expansion valve.
2. The method of calculating an initial opening degree of an electronic expansion valve according to claim 1, wherein the obtaining of the evaporation temperature, the condensation temperature, and the parameter of the compressor comprises:
acquiring an ambient temperature, and determining the evaporation temperature according to the relation between the ambient temperature and the evaporation temperature;
acquiring water temperature, and determining the condensation temperature according to the relation between the water temperature and the condensation temperature;
and acquiring the parameters of the compressor through a table look-up.
3. The method of calculating an initial opening degree of an electronic expansion valve according to claim 2, further comprising, after determining the evaporation temperature from the relationship between the ambient temperature and the evaporation temperature:
and correcting the evaporation temperature according to a first preset corresponding relation, wherein the first corresponding relation is the corresponding relation between the ambient temperature and a first correction value.
4. The method of calculating an initial opening degree of an electronic expansion valve according to claim 2, further comprising, after determining the condensing temperature from a relationship between the water temperature and the condensing temperature:
and correcting the condensation temperature according to a second preset corresponding relation, wherein the second corresponding relation is the corresponding relation between the water temperature and a second correction value.
5. The method of claim 1, wherein the determining a refrigerant mass flow rate based on the evaporation temperature, the condensation temperature, and the compressor parameter comprises:
according to the formula, the method comprises the following steps of,
M＝P1+P2*x+P3*y+P4*x2+P5*x*y+P6*y2+P7*x3+P8*x2*y+P9*x*y2+P10*y3calculating
Refrigerant mass flow, equationMiddle P1-P10Is a parameter of the compressor; x is the evaporation temperature, y is the condensation temperature, and M is the refrigerant mass flow.
6. An initial opening degree calculation device of an electronic expansion valve, comprising:
the acquisition module is used for acquiring the evaporation temperature, the condensation temperature and the parameters of the compressor;
the first determination module is used for determining the refrigerant mass flow according to the evaporation temperature, the condensation temperature and the parameters of the compressor;
and the second determining module is used for determining the initial opening degree of the electronic expansion valve according to a preset relation curve of the refrigerant mass flow and the opening degree of the electronic expansion valve.
7. The device for calculating the initial opening degree of an electronic expansion valve according to claim 6, wherein the obtaining module comprises:
the first acquisition unit is used for acquiring the ambient temperature and determining the evaporation temperature according to the relation between the ambient temperature and the evaporation temperature;
the second acquisition unit is used for acquiring water temperature and determining the condensation temperature according to the relation between the water temperature and the condensation temperature;
and the third acquisition unit is used for acquiring the parameters of the compressor through table lookup.
8. The initial opening degree calculation device of an electronic expansion valve according to claim 7, further comprising:
the first correction module is used for correcting the evaporation temperature according to a first preset corresponding relation, wherein the first corresponding relation is a corresponding relation between the ambient temperature and a first correction value.
9. An electronic device for calculating an initial opening degree of an electronic expansion valve, the electronic device comprising:
one or more processors;
storage means for storing one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors may implement the method for calculating an initial opening degree of an electronic expansion valve according to any one of claims 1 to 5.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a method for calculating an initial opening degree of an electronic expansion valve according to any one of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111032005.9A CN113758017A (en) | 2021-09-03 | 2021-09-03 | Initial opening degree calculation method, device, equipment and medium for electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111032005.9A CN113758017A (en) | 2021-09-03 | 2021-09-03 | Initial opening degree calculation method, device, equipment and medium for electronic expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113758017A true CN113758017A (en) | 2021-12-07 |
Family
ID=78792828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111032005.9A Pending CN113758017A (en) | 2021-09-03 | 2021-09-03 | Initial opening degree calculation method, device, equipment and medium for electronic expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113758017A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114279139A (en) * | 2021-12-23 | 2022-04-05 | 西安交通大学 | Parallel double-system variable frequency refrigerator with electronic expansion valve and control method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006038358A (en) * | 2004-07-28 | 2006-02-09 | Sharp Corp | Air conditioner |
| CN104676996A (en) * | 2015-03-19 | 2015-06-03 | 珠海格力电器股份有限公司 | Generation method and generation system for initial opening degree of electronic expansion valve |
| CN105605774A (en) * | 2016-03-11 | 2016-05-25 | 浙江正理生能科技有限公司 | Heat-pump hot water heater electronic expansion valve control system |
| CN108458520A (en) * | 2017-02-21 | 2018-08-28 | 青岛海尔空调电子有限公司 | Handpiece Water Chilling Units control method for electronic expansion valve |
| CN110332742A (en) * | 2019-07-08 | 2019-10-15 | 广东Tcl智能暖通设备有限公司 | Hot water apparatus and heat pump system control method, heat pump system control device |
| CN112146254A (en) * | 2020-09-26 | 2020-12-29 | 新奥数能科技有限公司 | Method for measuring refrigeration performance coefficient of water chilling unit and water chilling unit |
-
2021
- 2021-09-03 CN CN202111032005.9A patent/CN113758017A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006038358A (en) * | 2004-07-28 | 2006-02-09 | Sharp Corp | Air conditioner |
| CN104676996A (en) * | 2015-03-19 | 2015-06-03 | 珠海格力电器股份有限公司 | Generation method and generation system for initial opening degree of electronic expansion valve |
| CN105605774A (en) * | 2016-03-11 | 2016-05-25 | 浙江正理生能科技有限公司 | Heat-pump hot water heater electronic expansion valve control system |
| CN108458520A (en) * | 2017-02-21 | 2018-08-28 | 青岛海尔空调电子有限公司 | Handpiece Water Chilling Units control method for electronic expansion valve |
| CN110332742A (en) * | 2019-07-08 | 2019-10-15 | 广东Tcl智能暖通设备有限公司 | Hot water apparatus and heat pump system control method, heat pump system control device |
| CN112146254A (en) * | 2020-09-26 | 2020-12-29 | 新奥数能科技有限公司 | Method for measuring refrigeration performance coefficient of water chilling unit and water chilling unit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114279139A (en) * | 2021-12-23 | 2022-04-05 | 西安交通大学 | Parallel double-system variable frequency refrigerator with electronic expansion valve and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114251789B (en) | Control method and device for improving operation energy efficiency of multi-split heating mode and multi-split air conditioner | |
| CN113758017A (en) | Initial opening degree calculation method, device, equipment and medium for electronic expansion valve | |
| CN108345953B (en) | Temperature prediction method and device | |
| CN109282535B (en) | Electronic expansion valve opening degree adjusting method and device, control equipment and air conditioning system | |
| CN112066511A (en) | Control method of electronic expansion valve, air conditioner and computer equipment | |
| JP2007155715A (en) | System and method for verifying metadata during measuring processing | |
| CN110925953B (en) | Exhaust heat recovery anti-freezing control method, device and system | |
| CN113587508B (en) | Defrosting control method and device of heat pump unit and computer equipment | |
| CN113557397B (en) | Refrigerant amount estimation device, method, and program | |
| CN110617235B (en) | Method and device for controlling fan flow, computer equipment and readable storage medium | |
| CN111999083B (en) | Standard machine monitoring method and device and storage medium | |
| CN115469730A (en) | Server heat dissipation control method and device, computer equipment and storage medium | |
| CN115597135A (en) | Dehumidifier air outlet temperature control method and system and dehumidifier | |
| CN113686066B (en) | Heat pump system control method and device | |
| CN110594981B (en) | Method, device and system for indirectly acquiring evaporation temperature of air conditioner and storage medium | |
| CN111306695B (en) | Compressor load data optimization method and device, computer equipment and storage medium | |
| CN112082786B (en) | Method and device for predicting normal operation performance of air preheater of generator set | |
| CN114312213A (en) | Refrigerant capacity abnormality prediction method, apparatus, device and medium for vehicle | |
| CN110848885B (en) | Air conditioner, defrosting method thereof and computer readable storage medium | |
| CN115795769A (en) | Optimal design method, device and equipment for vehicle air conditioning system and storage medium | |
| CN113189272A (en) | Method for correcting monitoring data of gas sensor and cooking equipment | |
| CN111928430A (en) | Air conditioner energy efficiency grade determining method and device, computer equipment and storage medium | |
| CN115653884B (en) | Method and device for controlling rotation speed of automobile compressor, computer equipment and storage medium | |
| CN116952627A (en) | Air conditioner refrigerating capacity testing device and method, computing equipment and computer storage medium | |
| CN114815928B (en) | Method and device for controlling air outlet temperature of blower, terminal and storage medium |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211207 |