CN114413497A - Two-stage compressor, control method and device, control equipment and refrigeration equipment - Google Patents
Two-stage compressor, control method and device, control equipment and refrigeration equipment Download PDFInfo
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- CN114413497A CN114413497A CN202210010416.6A CN202210010416A CN114413497A CN 114413497 A CN114413497 A CN 114413497A CN 202210010416 A CN202210010416 A CN 202210010416A CN 114413497 A CN114413497 A CN 114413497A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention discloses a double-stage compressor, a control method, a control device, control equipment and refrigeration equipment, wherein the method comprises the steps of obtaining the intermediate pressure and the intermediate temperature of the double-stage compressor; determining a degree of subcooling based on the intermediate pressure and the intermediate temperature; and controlling the running state of the two-stage compressor according to the supercooling degree and the intermediate temperature. By applying the scheme of the invention, the intermediate pressure of the two-stage compressor is monitored by the pressure sensor, the intermediate temperature of the two-stage compressor is monitored by the temperature sensor, and the supercooling degree is determined and obtained, wherein the supercooling degree is used for reflecting the degree of the refrigerating capacity of the high-temperature stage compressor, and the low-temperature stage compressor is started after meeting the starting condition and runs under the working condition to meet the refrigerating requirement. And, by monitoring more factors related to the operation of the dual-stage compressor, the reliability and stability of the operation of the dual-stage compressor are also achieved. Therefore, the scheme of the invention improves the stability and reliability of the operation of the double-stage compressor and improves the product competitiveness of the double-stage compressor.
Description
Technical Field
The invention relates to the technical field of compressor control, in particular to a two-stage compressor, a control method and a control device of the two-stage compressor, control equipment and refrigeration equipment.
Background
A two-stage compressor refers to a compressor in which two stages complete compression, each stage having one or more cylinders. When the evaporating temperature of the refrigerating system is required to be controlled below minus 30 to minus 40 ℃, the compression ratio and the pressure difference of the single-stage compressor are limited to a certain extent. After a two-stage compressor and a low-temperature refrigerant are adopted, the evaporating temperature of-65 to-75 ℃ can be obtained. Thus, the two-stage compressor may be used in cold boxes and other cryogenic devices.
In the control of the current two-stage compressor, the operation state of the compressor is generally reflected based on the set temperature, the temperature in the tank and the time, and the control method of the two-stage compressor is an empirical mode obtained through long-term research and development, so that once a system which operates for a long time changes, the current stability is broken, and the reliability of the compressor cannot be completely guaranteed.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the problems of poor operation reliability and unstable operation when the double-stage compressor is controlled through an experience mode in the prior art are solved.
In order to solve the above technical problem, the present invention provides a method for controlling a two-stage compressor, comprising:
acquiring the intermediate pressure and the intermediate temperature of the two-stage compressor;
determining a degree of subcooling based on the intermediate pressure and the intermediate temperature;
and controlling the running state of the two-stage compressor according to the supercooling degree and the intermediate temperature.
Optionally, before obtaining the intermediate pressure and the intermediate temperature of the dual-stage compressor, the method further includes:
acquiring the internal temperature of the refrigeration equipment;
judging whether the internal temperature reaches a first set temperature;
responding to the internal temperature reaching the first set temperature, and judging whether the shutdown time of the high-temperature stage compressor reaches a first preset time;
and responding to the stop time of the high-temperature-stage compressor reaching a first preset time, and starting the high-temperature-stage compressor to operate.
Optionally, the controlling the operation state of the two-stage compressor according to the supercooling degree and the intermediate temperature includes:
judging whether the intermediate temperature is less than or equal to a second set temperature;
and controlling the running frequency of the high-temperature stage compressor to be reduced based on the supercooling degree in response to the intermediate temperature being less than or equal to the second set temperature.
Optionally, the controlling the reduction of the operating frequency of the high-temperature stage compressor based on the supercooling degree comprises:
in response to the supercooling degree being greater than or equal to a first set value and smaller than a second set value, reducing the operating frequency of the high-temperature stage compressor at a first set frequency reduction speed;
in response to the supercooling degree being smaller than a first set value, reducing the operating frequency of the high-temperature stage compressor at a second set frequency reduction speed;
wherein the first set down-conversion speed is less than the second set down-conversion speed.
Optionally, the controlling the operation state of the two-stage compressor according to the supercooling degree and the intermediate temperature includes:
judging whether the intermediate temperature is greater than a second set temperature;
and controlling the running frequency of the high-temperature stage compressor to be increased based on the supercooling degree in response to the intermediate temperature being greater than a second set temperature.
Optionally, the controlling the operation frequency of the high-temperature stage compressor to increase based on the supercooling degree comprises:
in response to the supercooling degree being greater than or equal to a third set value and smaller than a fourth set value, increasing the operating frequency of the high-temperature stage compressor at a first set increasing speed;
in response to the supercooling degree being greater than or equal to a fourth set value, increasing the operating frequency of the high-temperature-stage compressor at a second set increasing speed;
wherein the first set up ramp rate is greater than the second set up ramp rate.
Optionally, the controlling the operation state of the two-stage compressor according to the supercooling degree and the intermediate temperature includes:
judging whether the internal temperature of the refrigeration equipment is higher than the first set temperature or not in the running process of the high-temperature stage compressor;
responding to the fact that the internal temperature is larger than the first set temperature, and judging whether the running time of the high-temperature stage compressor reaches a second preset time;
responding to the running time of the high-temperature stage compressor reaching a second preset time, and judging whether the supercooling degree is greater than or equal to a fifth set value;
and responding to whether the supercooling degree is larger than or equal to a fifth set value or not, and starting to operate the low-temperature stage compressor.
Optionally, the controlling the operation state of the two-stage compressor according to the supercooling degree and the intermediate temperature further includes:
judging whether the internal temperature is greater than a third set temperature and less than or equal to a fourth set temperature or not in the running process of the low-temperature stage compressor;
in response to the internal temperature being greater than the third set temperature and less than or equal to the fourth set temperature, the low stage compressor is operated at the current operating frequency.
Optionally, the controlling the operation state of the two-stage compressor according to the supercooling degree and the intermediate temperature further includes:
in response to the internal temperature being less than or equal to the third set temperature, reducing the operating frequency of the low stage compressor at a third set downconversion speed;
in response to the internal temperature being greater than the fourth set temperature, increasing the operating frequency of the low stage compressor at a fourth set boost speed.
Optionally, the controlling the operation state of the two-stage compressor according to the supercooling degree and the intermediate temperature further includes:
judging whether the operation time of the low-temperature stage compressor reaches a second set time;
in response to the operating time period of the low temperature stage compressor reaching a second set time period, the low temperature stage compressor and the high temperature stage compressor are shut down.
In order to solve the above technical problem, the present invention provides a control device of a two-stage compressor, including:
the parameter acquisition module is used for acquiring the intermediate pressure and the intermediate temperature of the two-stage compressor;
a supercooling degree determination module for determining a supercooling degree based on the intermediate pressure and the intermediate temperature;
and the operation state control module is used for controlling the operation state of the two-stage compressor according to the supercooling degree and the intermediate temperature.
Optionally, the parameter obtaining module is further configured to obtain an internal temperature of the refrigeration equipment;
the operation state control module is used for:
judging whether the internal temperature reaches a first set temperature; responding to the internal temperature reaching the first set temperature, and judging whether the shutdown time of the high-temperature stage compressor reaches a first preset time; and responding to the stop time of the high-temperature-stage compressor reaching a first preset time, and starting the high-temperature-stage compressor to operate.
Optionally, the operation state control module is configured to:
judging whether the intermediate temperature is less than or equal to a second set temperature;
and controlling the running frequency of the high-temperature stage compressor to be reduced based on the supercooling degree in response to the intermediate temperature being less than or equal to the second set temperature.
Optionally, the operation state control module is specifically configured to:
in response to the supercooling degree being greater than or equal to a first set value and smaller than a second set value, reducing the operating frequency of the high-temperature stage compressor at a first set frequency reduction speed;
in response to the supercooling degree being smaller than a first set value, reducing the operating frequency of the high-temperature stage compressor at a second set frequency reduction speed;
wherein the first set down-conversion speed is less than the second set down-conversion speed.
Optionally, the operation state control module is specifically configured to:
judging whether the intermediate temperature is greater than a second set temperature;
and controlling the running frequency of the high-temperature stage compressor to be increased based on the supercooling degree in response to the intermediate temperature being greater than a second set temperature.
Optionally, the operation state control module is specifically configured to:
in response to the supercooling degree being greater than or equal to a third set value and smaller than a fourth set value, increasing the operating frequency of the high-temperature stage compressor at a first set increasing speed;
in response to the supercooling degree being greater than or equal to a fourth set value, increasing the operating frequency of the high-temperature-stage compressor at a second set increasing speed;
wherein the first set up ramp rate is greater than the second set up ramp rate.
Optionally, the operation state control module is specifically configured to:
judging whether the internal temperature of the refrigeration equipment is higher than the first set temperature or not in the running process of the high-temperature stage compressor;
responding to the fact that the internal temperature is larger than the first set temperature, and judging whether the running time of the high-temperature stage compressor reaches a second preset time;
responding to the running time of the high-temperature stage compressor reaching a second preset time, and judging whether the supercooling degree is greater than or equal to a fifth set value;
and responding to whether the supercooling degree is larger than or equal to a fifth set value or not, and starting to operate the low-temperature stage compressor.
Optionally, the operation state control module is specifically configured to:
judging whether the internal temperature is greater than a third set temperature and less than or equal to a fourth set temperature or not in the running process of the low-temperature stage compressor;
in response to the internal temperature being greater than the third set temperature and less than or equal to the fourth set temperature, the low stage compressor is operated at the current operating frequency.
Optionally, the operation state control module is specifically configured to:
in response to the internal temperature being less than or equal to the third set temperature, reducing the operating frequency of the low stage compressor at a third set downconversion speed;
in response to the internal temperature being greater than the fourth set temperature, increasing the operating frequency of the low stage compressor at a fourth set boost speed.
Optionally, the operation state control module is specifically configured to:
judging whether the operation time of the low-temperature stage compressor reaches a second set time;
in response to the operating time period of the low temperature stage compressor reaching a second set time period, the low temperature stage compressor and the high temperature stage compressor are shut down.
In order to solve the technical problem, the present invention provides a control device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method when executing the computer program.
In order to solve the technical problem, the invention provides a two-stage compressor, which comprises the control equipment, a pressure sensor arranged at a condensation outlet of a condensation evaporator, and a temperature sensor arranged at the condensation outlet of the condensation evaporator.
In order to solve the technical problem, the invention provides a refrigeration device which comprises the two-stage compressor.
To solve the above technical problem, the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above method.
Compared with the prior art, one or more embodiments in the above scheme can have the following advantages or beneficial effects:
by applying the two-stage compressor, the control method and the control device, the control equipment and the refrigeration equipment, the intermediate pressure and the intermediate temperature of the two-stage compressor are obtained; determining a degree of subcooling based on the intermediate pressure and the intermediate temperature; and controlling the running state of the two-stage compressor according to the supercooling degree and the intermediate temperature. The starting performance and the running state of the two-stage compressor are closely related to the intermediate pressure and the intermediate temperature, so that the intermediate pressure of the two-stage compressor is monitored through the pressure sensor, the intermediate temperature of the two-stage compressor is monitored through the temperature sensor, the supercooling degree is determined and obtained, the supercooling degree is used for reflecting the degree of the high-temperature compressor, the high-temperature compressor is started after the low-temperature compressor meets the starting condition, and the low-temperature compressor runs under the working condition to meet the refrigerating requirement. And, by monitoring more factors related to the operation of the dual-stage compressor, the reliability and stability of the operation of the dual-stage compressor are also achieved. Therefore, the scheme of the invention improves the stability and reliability of the operation of the double-stage compressor and improves the product competitiveness of the double-stage compressor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a first flowchart of a dual-stage compressor control method according to an embodiment of the present invention;
FIG. 2 is a second flowchart of a dual-stage compressor control method according to an embodiment of the present invention;
FIG. 3 is a third flowchart of a dual stage compressor control method according to an embodiment of the present invention;
FIG. 4 is a fourth flowchart of a dual stage compressor control method according to an embodiment of the present invention;
FIG. 5 is a fifth flowchart of a dual-stage compressor control method according to an embodiment of the present invention;
FIG. 6 is a block diagram of a dual stage compressor control arrangement according to an embodiment of the present invention;
fig. 7 is a structural diagram of a control device provided by the present invention.
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.
In order to solve the problems of poor operation reliability and unstable operation of a double-stage compressor controlled in an empirical mode in the prior art, the embodiment of the invention provides a double-stage compressor, a control method and a control device of the double-stage compressor, control equipment of the double-stage compressor and refrigeration equipment of the double-stage compressor.
The following describes a control method of a two-stage compressor according to an embodiment of the present invention.
Example one
As shown in fig. 1, a first flowchart of a method for controlling a dual-stage compressor according to an embodiment of the present invention may include the following steps:
step S101: intermediate pressures and intermediate temperatures of the two-stage compressor are obtained.
Step S102: a degree of subcooling is determined based on the intermediate pressure and the intermediate temperature.
In one implementation, when the intermediate pressure is in different intervals, different expressions are used to calculate the corresponding supercooling degree, and the supercooling degree can be determined according to the following expression:
wherein, PxAt an intermediate pressure, TxIs the intermediate temperature.
In practical applications, the expression may be obtained by fitting historical data of intermediate pressure, intermediate temperature, and supercooling degree, and the expression may be different for different refrigeration devices or different two-stage compressors.
Step S103: and controlling the running state of the two-stage compressor according to the supercooling degree and the intermediate temperature.
By applying the two-stage compressor and the control method, the starting performance and the running state of the two-stage compressor are closely related to the intermediate pressure and the intermediate temperature, so that the intermediate pressure of the two-stage compressor is monitored by the pressure sensor, the intermediate temperature of the two-stage compressor is monitored by the temperature sensor, and the supercooling degree is determined and obtained, and is used for reflecting the degree of the refrigerating capacity of the high-temperature-stage compressor, and the two-stage compressor is started after meeting the starting condition and runs under the working condition to meet the refrigerating requirement. The scheme of the invention improves the stability and reliability of the operation of the two-stage compressor and improves the product competitiveness of the two-stage compressor.
Example two
As shown in fig. 2, a second flowchart of a method for controlling a dual-stage compressor according to an embodiment of the present invention may include the following steps:
step S201: the internal temperature of the refrigeration equipment is acquired.
Step S202: and judging whether the internal temperature reaches a first set temperature.
Step S203: and responding to the internal temperature reaching the first set temperature, and judging whether the shutdown time of the high-temperature stage compressor reaches a first preset time.
It should be noted that, when the power switch of the two-stage compressor is turned on, both the high-temperature stage compressor and the low-temperature stage compressor are stoppedA machine state; normally, the condensing fan is started after turning on the power switch for a certain time, for example, 1 min. Further, the temperature raising stage is entered to judge the internal temperature T of the refrigeration equipment (such as a low-temperature storage tank)dAnd a first set temperature TsWhen the size of (1) is Td＜TsThe high-temperature stage compressor and the low-temperature stage compressor are in a shutdown state; when T isd≥TsAnd if the high-temperature compressor is stopped for more than or equal to a first preset time period, such as 3min, starting the high-temperature stage compressor at an initial frequency f (for example, f is 33Hz), and otherwise, maintaining the stop.
Step S204: and responding to the stop time of the high-temperature-stage compressor reaching a first preset time, and starting the high-temperature-stage compressor to operate.
Step S205: intermediate pressures and intermediate temperatures of the two-stage compressor are obtained.
Step S206: a degree of subcooling is determined based on the intermediate pressure and the intermediate temperature.
Step S207: and controlling the running state of the two-stage compressor according to the supercooling degree and the intermediate temperature.
In one case, judging whether the running time of the low-temperature stage compressor reaches a second set time when the high-temperature stage compressor and the low-temperature stage compressor are in a running state; in response to the operating time period of the low temperature stage compressor reaching a second set time period, the low temperature stage compressor and the high temperature stage compressor are shut down. For example, if the internal temperature T is during operation of the low temperature stage compressord≤TsA, the frequency of the low-temperature stage compressor is kept unchanged, and when the continuous operation time of the low-temperature stage compressor is more than a second set time period T2(e.g., 5min), at which time the low temperature stage compressor is shut down and the high temperature stage compressor is shut down.
It should be noted that the method embodiment shown in fig. 2 has all the advantages of the method embodiment shown in fig. 1, and besides, in the method embodiment shown in fig. 2, whether to start the high-temperature stage compressor is determined by the numerical relationship between the internal temperature of the refrigeration equipment and the first set temperature, so that the control of the high-temperature stage compressor is optimized. Furthermore, the starting performance of the low-temperature stage compressor can be ensured, the low-temperature stage compressor is prevented from being started and stopped frequently, and the service life of the compressor is prolonged by judging whether the shutdown duration of the high-temperature stage compressor reaches a set value or not.
EXAMPLE III
Referring to fig. 3, a third flowchart of a dual-stage compressor control method according to an embodiment of the present invention is provided, which may include the following steps based on the embodiment of the method shown in fig. 2:
step S301: the internal temperature of the refrigeration equipment is acquired.
Step S302: and judging whether the internal temperature reaches a first set temperature.
Step S303: and responding to the internal temperature reaching the first set temperature, and judging whether the shutdown time of the high-temperature stage compressor reaches a first preset time.
Step S304: and responding to the stop time of the high-temperature-stage compressor reaching a first preset time, and starting the high-temperature-stage compressor to operate.
Step S305: intermediate pressures and intermediate temperatures of the two-stage compressor are obtained.
Step S306: a degree of subcooling is determined based on the intermediate pressure and the intermediate temperature.
It should be noted that steps S301 to S306 in the method embodiment shown in fig. 3 are similar to steps S201 to S206 in the method embodiment shown in fig. 2, and are not repeated here.
Step S307: and judging whether the intermediate temperature is less than or equal to a second set temperature.
Step S308: and controlling the running frequency of the high-temperature stage compressor to be reduced based on the supercooling degree in response to the intermediate temperature being less than or equal to the second set temperature.
In one case, in response to the supercooling degree being greater than or equal to a first set value and less than a second set value, the operating frequency of the high-temperature stage compressor is reduced at a first set down-conversion speed; in response to the supercooling degree being smaller than a first set value, reducing the operating frequency of the high-temperature stage compressor at a second set frequency reduction speed; in thatUnder the condition that the supercooling degree is greater than a second set value, the high-temperature-stage compressor operates at the current frequency; wherein the first set down-conversion speed is less than the second set down-conversion speed. Specifically, the intermediate temperature T is acquired with the second set temperature being-35xWhen T isxJudging the action of the high-temperature compressor according to the supercooling degree when the temperature is less than or equal to-35 ℃; if the supercooling degree is less than 1, and the running frequency of the high-temperature-stage compressor is greater than the target frequency, controlling the high-temperature-stage compressor to continuously reduce the frequency, wherein the frequency reduction speed can be 1/30s Hz; if the supercooling degree is more than or equal to 1 and less than 5, and the operating frequency of the high-temperature-stage compressor is greater than the target frequency, controlling the high-temperature-stage compressor to continuously reduce the frequency, wherein the frequency reduction speed can be 1/60s Hz; otherwise the compressor maintains the current frequency operation.
It should be noted that, in addition to the overall beneficial effects of the method embodiment shown in fig. 2, the method embodiment shown in fig. 3 further provides that when the intermediate temperature is less than or equal to the second set temperature, the operating frequency of the high-temperature stage compressor can be reduced according to the determined supercooling degree.
Example four
Referring to fig. 4, a fourth flowchart of a dual-stage compressor control method according to an embodiment of the present invention is provided, which may include the following steps based on the embodiment of the method shown in fig. 2:
step S401: the internal temperature of the refrigeration equipment is acquired.
Step S402: and judging whether the internal temperature reaches a first set temperature.
Step S403: and responding to the internal temperature reaching the first set temperature, and judging whether the shutdown time of the high-temperature stage compressor reaches a first preset time.
Step S404: and responding to the stop time of the high-temperature-stage compressor reaching a first preset time, and starting the high-temperature-stage compressor to operate.
Step S405: intermediate pressures and intermediate temperatures of the two-stage compressor are obtained.
Step S406: a degree of subcooling is determined based on the intermediate pressure and the intermediate temperature.
It should be noted that steps S401 to S406 in the method embodiment shown in fig. 4 are similar to steps S201 to S206 in the method embodiment shown in fig. 2, and are not repeated here.
Step S407: and judging whether the intermediate temperature is greater than a second set temperature.
Step S408: and controlling the running frequency of the high-temperature stage compressor to be increased based on the supercooling degree in response to the intermediate temperature being greater than a second set temperature.
In one case, in response to the supercooling degree being greater than or equal to a third set value and less than a fourth set value, the operating frequency of the high-temperature stage compressor is increased at a first set up-conversion rate; in response to the supercooling degree being greater than or equal to a fourth set value, increasing the operating frequency of the high-temperature-stage compressor at a second set increasing speed; in the case that the supercooling degree is less than a third set value, the high-temperature stage compressor operates at a current frequency; wherein the first set up ramp rate is greater than the second set up ramp rate. Specifically, the intermediate temperature T is acquired with the second set temperature being-35xWhen T isxWhen > -35, judging the action of the high-temperature compressor according to the supercooling degree; when the supercooling degree is less than 1, and the operating frequency of the high-temperature stage compressor is less than the target frequency, controlling the high-temperature stage compressor to continuously increase the frequency, wherein the frequency increasing speed can be 3/30s Hz; when the supercooling degree is less than or equal to 1 and less than 5, and the operating frequency of the high-temperature-stage compressor is lower than the target frequency, controlling the high-temperature-stage compressor to continuously increase the frequency, wherein the frequency increasing speed can be 1/60s Hz; and when the supercooling degree is more than or equal to 5, controlling the high-temperature-stage compressor to continuously increase the frequency at the frequency increasing speed of 1/60s Hz when the operating frequency of the high-temperature-stage compressor is less than the target frequency.
The third set value in the fourth embodiment may be the same as or different from the first set value in the third embodiment, and similarly, the fourth set value in the fourth embodiment may be the same as or different from the second set value in the third embodiment, and the terms "first", "second", "third", and "fourth" herein are used only for distinguishing physical quantities in different embodiments and are not used for limiting specific physical quantity numerical values.
It should be noted that, in addition to the overall beneficial effects of the method embodiment shown in fig. 2, the method embodiment shown in fig. 4 further provides that when the intermediate temperature is greater than the second set temperature, the operating frequency of the high-temperature stage compressor can be reduced according to the determined supercooling degree.
EXAMPLE five
Referring to fig. 5, a fifth flowchart of a method for controlling a dual-stage compressor according to an embodiment of the present invention is shown, and based on the embodiment of the method shown in fig. 2, the method may include the following steps:
step S501: the internal temperature of the refrigeration equipment is acquired.
Step S502: and judging whether the internal temperature reaches a first set temperature.
Step S503: and responding to the internal temperature reaching the first set temperature, and judging whether the shutdown time of the high-temperature stage compressor reaches a first preset time.
Step S504: and responding to the stop time of the high-temperature-stage compressor reaching a first preset time, and starting the high-temperature-stage compressor to operate.
Step S505: intermediate pressures and intermediate temperatures of the two-stage compressor are obtained.
Step S506: a degree of subcooling is determined based on the intermediate pressure and the intermediate temperature.
It should be noted that steps S501 to S506 in the method embodiment shown in fig. 5 are similar to steps S201 to S206 in the method embodiment shown in fig. 2, and are not repeated here.
Step S507: and judging whether the internal temperature of the refrigeration equipment is higher than the first set temperature or not in the running process of the high-temperature stage compressor.
Step S508: and responding to the fact that the internal temperature is larger than the first set temperature, and judging whether the running time of the high-temperature stage compressor reaches a second preset time.
Step S509: and responding to the fact that the running time of the high-temperature stage compressor reaches a second preset time, and judging whether the supercooling degree is larger than or equal to a fifth set value.
Step S510: and responding to whether the supercooling degree is larger than or equal to a fifth set value or not, and starting to operate the low-temperature stage compressor.
In one case, the controlling the operation state of the two-stage compressor according to the supercooling degree and the intermediate temperature further includes:
judging whether the internal temperature is greater than a third set temperature and less than or equal to a fourth set temperature or not in the running process of the low-temperature stage compressor; in response to the internal temperature being greater than the third set temperature and less than or equal to the fourth set temperature, the low stage compressor is operated at the current operating frequency. Further, in response to the internal temperature being less than or equal to the third set temperature, reducing the operating frequency of the low-temperature stage compressor at a third set downconversion speed; in response to the internal temperature being greater than the fourth set temperature, increasing the operating frequency of the low stage compressor at a fourth set boost speed. For example, when the internal temperature Td＜TsAnd when the starting running time of the high-temperature stage compressor is greater than or equal to 30s and the current supercooling degree is greater than or equal to 1, starting the low-temperature stage compressor by taking the initial frequency as f, otherwise, maintaining the shutdown state of the low-temperature stage compressor. During the operation of the low-temperature stage compressor, the internal temperature T is controlleddAnd a set temperature TsJudging the operation of the compressor if the internal temperature TdThird set temperature TsWhen the running frequency of the low-temperature stage compressor is lower than the target frequency at the time of-1, controlling the low-temperature stage compressor to continuously increase the frequency at the frequency increasing speed of 3/30s Hz; if T isd≤Ts-2, when the operating frequency of the low-temperature stage compressor is higher than the target frequency, controlling the low-temperature stage compressor to continuously reduce the frequency at the frequency reduction speed of 1/30s Hz; otherwise the compressor maintains the current frequency operation.
It should be noted that the embodiment of the method shown in fig. 5 has all the advantages of the embodiment of the method shown in fig. 2, in addition, a control strategy for starting the low-temperature stage compressor is provided in the embodiment of the method shown in fig. 5, and the determination of the operating state of the low-temperature stage compressor and the control process of the operating state of the high-temperature stage compressor are performed synchronously, in the operating process of the high-temperature stage compressor, whether to start the low-temperature stage compressor is determined in real time, and the operating state of the high-temperature stage compressor, such as the operating duration, is also combined when the low-temperature stage compressor is started, so that the control strategy for the two-stage compressor better conforms to the actual operating condition, and the control is more accurate.
The following describes a control device for a two-stage compressor according to an embodiment of the present invention.
EXAMPLE six
As shown in fig. 6, a structural diagram of a control apparatus of a dual stage compressor according to an embodiment of the present invention includes:
a parameter obtaining module 610 for obtaining an intermediate pressure and an intermediate temperature of the two-stage compressor;
a supercooling degree determination module 620 for determining a supercooling degree based on the intermediate pressure and the intermediate temperature;
and an operation state control module 630, configured to control an operation state of the two-stage compressor according to the supercooling degree and the intermediate temperature.
In one case, the parameter obtaining module 610 is further configured to obtain an internal temperature of the refrigeration equipment;
the operation state control module 630 is configured to determine whether the internal temperature reaches a first set temperature; responding to the internal temperature reaching the first set temperature, and judging whether the shutdown time of the high-temperature stage compressor reaches a first preset time; and responding to the stop time of the high-temperature-stage compressor reaching a first preset time, and starting the high-temperature-stage compressor to operate.
Optionally, the operation state control module 630 is configured to determine whether the intermediate temperature is less than or equal to a second set temperature; and controlling the running frequency of the high-temperature stage compressor to be reduced based on the supercooling degree in response to the intermediate temperature being less than or equal to the second set temperature.
Optionally, the operation state control module 630 is specifically configured to, in response to that the supercooling degree is greater than or equal to a first set value and less than a second set value, decrease the operation frequency of the high-temperature stage compressor at a first set frequency reduction speed; in response to the supercooling degree being smaller than a first set value, reducing the operating frequency of the high-temperature stage compressor at a second set frequency reduction speed; in the case that the supercooling degree is greater than a second set value, the high-temperature stage compressor operates at a current frequency; wherein the first set down-conversion speed is less than the second set down-conversion speed.
Optionally, the operation state control module 630 is specifically configured to determine whether the intermediate temperature is greater than a second set temperature; and controlling the running frequency of the high-temperature stage compressor to be increased based on the supercooling degree in response to the intermediate temperature being greater than a second set temperature.
Optionally, the operation state control module 630 is specifically configured to, in response to that the supercooling degree is greater than or equal to a third set value and less than a fourth set value, increase the operation frequency of the high-temperature stage compressor at a first set increasing speed; in response to the supercooling degree being greater than or equal to a fourth set value, increasing the operating frequency of the high-temperature-stage compressor at a second set increasing speed; in the case that the supercooling degree is less than a third set value, the high-temperature stage compressor operates at a current frequency; wherein the first set up ramp rate is greater than the second set up ramp rate.
Optionally, the operation state control module 630 is specifically configured to determine whether an internal temperature of the refrigeration apparatus is greater than the first set temperature in an operation process of the high-temperature stage compressor; responding to the fact that the internal temperature is larger than the first set temperature, and judging whether the running time of the high-temperature stage compressor reaches a second preset time; responding to the running time of the high-temperature stage compressor reaching a second preset time, and judging whether the supercooling degree is greater than or equal to a fifth set value; and responding to whether the supercooling degree is larger than or equal to a fifth set value or not, and starting to operate the low-temperature stage compressor.
Optionally, the operation state control module 630 is specifically configured to determine whether the internal temperature is greater than a third set temperature and less than or equal to a fourth set temperature in an operation process of the low-temperature stage compressor; in response to the internal temperature being greater than the third set temperature and less than or equal to the fourth set temperature, the low stage compressor is operated at the current operating frequency.
Optionally, the operation state control module 630 is specifically configured to decrease the operation frequency of the low-temperature stage compressor at a third set down-conversion speed in response to the internal temperature being less than or equal to the third set temperature; in response to the internal temperature being greater than the fourth set temperature, increasing the operating frequency of the low stage compressor at a fourth set boost speed.
Optionally, the operation state control module 630 is specifically configured to determine whether the operation duration of the low-temperature stage compressor reaches a second set duration; in response to the operating time period of the low temperature stage compressor reaching a second set time period, the low temperature stage compressor and the high temperature stage compressor are shut down.
The control device of the double-stage compressor is applied to obtain the intermediate pressure and the intermediate temperature of the double-stage compressor; determining a degree of subcooling based on the intermediate pressure and the intermediate temperature; and controlling the running state of the two-stage compressor according to the supercooling degree and the intermediate temperature. The starting performance and the running state of the two-stage compressor are closely related to the intermediate pressure and the intermediate temperature, so that the intermediate pressure of the two-stage compressor is monitored through the pressure sensor, the intermediate temperature of the two-stage compressor is monitored through the temperature sensor, the supercooling degree is determined and obtained, the supercooling degree is used for reflecting the degree of the high-temperature compressor, the high-temperature compressor is started after the low-temperature compressor meets the starting condition, and the low-temperature compressor runs under the working condition to meet the refrigerating requirement. And, by monitoring more factors related to the operation of the dual-stage compressor, the reliability and stability of the operation of the dual-stage compressor are also achieved. Therefore, the scheme of the invention improves the stability and reliability of the operation of the double-stage compressor and improves the product competitiveness of the double-stage compressor.
EXAMPLE seven
In order to solve the above technical problem, the present invention provides a control device, as shown in fig. 7, including a memory 710, a processor 720, and a computer program stored on the memory and executable on the processor, wherein the processor executes the computer program to implement the method as described above.
The control device can be a desktop computer, a notebook, a palm computer, a cloud server and other computing devices. The control device may include, but is not limited to, a processor 720, a memory 710. It will be appreciated by those skilled in the art that fig. 7 is merely an example of a control device and is not intended to be limiting and may include more or fewer components than shown, or some components may be combined, or different components, for example the control device may also include input output devices, network access devices, buses, etc.
The Processor 720 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 710 may be an internal storage unit of the control device, such as a hard disk or a memory of the control device. The memory 710 may also be an external storage device of the control device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like provided on the control device. Further, the memory 710 may also include both an internal storage unit and an external storage device of the control device. The memory 710 is used for storing the computer programs and other programs and data required by the control device. The memory 710 may also be used to temporarily store data that has been output or is to be output.
Example eight
In order to solve the above technical problem, the present invention provides a two-stage compressor, which includes the control device shown in fig. 7, a pressure sensor disposed at a condensation outlet of a condensation evaporator, and a temperature sensor disposed at a condensation outlet of the condensation evaporator.
Further, the present invention provides a refrigerating apparatus including the two-stage compressor of the eighth embodiment. In practice, the refrigeration device may be, but is not limited to, a cryogenic storage tank.
According to the two-stage compressor and the refrigeration equipment, the intermediate pressure of the two-stage compressor is monitored through the pressure sensor, the intermediate temperature of the two-stage compressor is monitored through the temperature sensor, and the supercooling degree is determined and obtained, the supercooling degree is used for reflecting the degree of the refrigerating capacity of the high-temperature stage compressor, the two-stage compressor is started after the low-temperature stage compressor meets the starting condition, and the two-stage compressor and the refrigeration equipment run under the working condition to meet the refrigerating requirement. And, by monitoring more factors related to the operation of the dual-stage compressor, the reliability and stability of the operation of the dual-stage compressor are also achieved. Therefore, the scheme of the invention improves the stability and reliability of the operation of the two-stage compressor and improves the product competitiveness of the two-stage compressor and the refrigeration equipment.
Example nine
The embodiment of the present application further provides a computer-readable storage medium, which may be a computer-readable storage medium contained in the memory in the foregoing embodiment; or it may be a computer readable storage medium that exists separately and is not built into the control device. The computer-readable storage medium stores one or more computer programs which, when executed by a processor, implement the methods described above.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above can be realized by a computer program, which can be stored in a computer-readable storage medium and can realize the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory 710, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
For system or apparatus embodiments, since they are substantially similar to method embodiments, they are described in relative simplicity, and reference may be made to some descriptions of method embodiments for related points.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It is to be understood that the terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the present application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a described condition or event is detected" may be interpreted, depending on the context, to mean "upon determining" or "in response to determining" or "upon detecting a described condition or event" or "in response to detecting a described condition or event".
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (15)
1. A method of controlling a two-stage compressor, comprising:
acquiring the intermediate pressure and the intermediate temperature of the two-stage compressor;
determining a degree of subcooling based on the intermediate pressure and the intermediate temperature;
and controlling the running state of the two-stage compressor according to the supercooling degree and the intermediate temperature.
2. The dual-stage compressor control method as recited in claim 1, further comprising, prior to obtaining the intermediate pressure and the intermediate temperature of the dual-stage compressor:
acquiring the internal temperature of the refrigeration equipment;
judging whether the internal temperature reaches a first set temperature;
responding to the internal temperature reaching the first set temperature, and judging whether the shutdown time of the high-temperature stage compressor reaches a first preset time;
and responding to the stop time of the high-temperature-stage compressor reaching a first preset time, and starting the high-temperature-stage compressor to operate.
3. The two-stage compressor control method of claim 1, wherein the controlling the operating state of the two-stage compressor according to the supercooling degree and the intermediate temperature comprises:
judging whether the intermediate temperature is less than or equal to a second set temperature;
and controlling the running frequency of the high-temperature stage compressor to be reduced based on the supercooling degree in response to the intermediate temperature being less than or equal to the second set temperature.
4. The two-stage compressor control method of claim 3, wherein the controlling the reduction of the operating frequency of the high temperature stage compressor based on the subcooling degree comprises:
in response to the supercooling degree being greater than or equal to a first set value and smaller than a second set value, reducing the operating frequency of the high-temperature stage compressor at a first set frequency reduction speed;
in response to the supercooling degree being smaller than a first set value, reducing the operating frequency of the high-temperature stage compressor at a second set frequency reduction speed;
wherein the first set down-conversion speed is less than the second set down-conversion speed.
5. The two-stage compressor control method of claim 1, wherein the controlling the operating state of the two-stage compressor according to the supercooling degree and the intermediate temperature comprises:
judging whether the intermediate temperature is greater than a second set temperature;
and controlling the running frequency of the high-temperature stage compressor to be increased based on the supercooling degree in response to the intermediate temperature being greater than a second set temperature.
6. The two-stage compressor control method of claim 5, wherein the controlling the increase in the operating frequency of the high temperature stage compressor based on the degree of subcooling comprises:
in response to the supercooling degree being greater than or equal to a third set value and smaller than a fourth set value, increasing the operating frequency of the high-temperature stage compressor at a first set increasing speed;
in response to the supercooling degree being greater than or equal to a fourth set value, increasing the operating frequency of the high-temperature-stage compressor at a second set increasing speed;
wherein the first set up ramp rate is greater than the second set up ramp rate.
7. The two-stage compressor control method of claim 2, wherein the controlling the operating state of the two-stage compressor according to the degree of subcooling and the intermediate temperature comprises:
judging whether the internal temperature of the refrigeration equipment is higher than the first set temperature or not in the running process of the high-temperature stage compressor;
responding to the fact that the internal temperature is larger than the first set temperature, and judging whether the running time of the high-temperature stage compressor reaches a second preset time;
responding to the running time of the high-temperature stage compressor reaching a second preset time, and judging whether the supercooling degree is greater than or equal to a fifth set value;
and responding to whether the supercooling degree is larger than or equal to a fifth set value or not, and starting to operate the low-temperature stage compressor.
8. The two-stage compressor control method of claim 7, wherein the controlling the operating state of the two-stage compressor according to the degree of subcooling and the intermediate temperature further comprises:
judging whether the internal temperature is greater than a third set temperature and less than or equal to a fourth set temperature or not in the running process of the low-temperature stage compressor;
in response to the internal temperature being greater than the third set temperature and less than or equal to the fourth set temperature, the low stage compressor is operated at the current operating frequency.
9. The two-stage compressor control method of claim 8, wherein the controlling the operating state of the two-stage compressor according to the degree of subcooling and the intermediate temperature further comprises:
in response to the internal temperature being less than or equal to the third set temperature, reducing the operating frequency of the low stage compressor at a third set downconversion speed;
in response to the internal temperature being greater than the fourth set temperature, increasing the operating frequency of the low stage compressor at a fourth set boost speed.
10. The two-stage compressor control method according to claim 8 or 9, wherein the controlling of the operation state of the two-stage compressor according to the supercooling degree and the intermediate temperature further comprises:
judging whether the operation time of the low-temperature stage compressor reaches a second set time;
in response to the operating time period of the low temperature stage compressor reaching a second set time period, the low temperature stage compressor and the high temperature stage compressor are shut down.
11. A dual-stage compressor control apparatus, comprising:
the parameter acquisition module is used for acquiring the intermediate pressure and the intermediate temperature of the two-stage compressor;
a supercooling degree determination module for determining a supercooling degree based on the intermediate pressure and the intermediate temperature;
and the operation state control module is used for controlling the operation state of the two-stage compressor according to the supercooling degree and the intermediate temperature.
12. A control device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1 to 10 when executing the computer program.
13. A two-stage compressor comprising the control device of claim 12, and a pressure sensor disposed at a condensation outlet of the condensing evaporator, and a temperature sensor disposed at a condensation outlet of the condensing evaporator.
14. A refrigeration apparatus comprising the two-stage compressor of claim 13.
15. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the method according to any one of claims 1 to 10.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116358204A (en) * | 2023-03-31 | 2023-06-30 | 珠海格力电器股份有限公司 | Compressor control method, storage box and storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002327690A (en) * | 2001-04-27 | 2002-11-15 | Daikin Ind Ltd | Two-stage compressor |
| JP2007147232A (en) * | 2005-11-30 | 2007-06-14 | Daikin Ind Ltd | Refrigerating device |
| JP2015132413A (en) * | 2014-01-10 | 2015-07-23 | ダイキン工業株式会社 | Refrigeration device |
| EP3018351A2 (en) * | 2014-11-05 | 2016-05-11 | Mitsubishi Heavy Industries, Ltd. | Two-stage-compression refrigerating cycle apparatus, and device and method for controlling the apparatus |
| CN105962005A (en) * | 2016-05-09 | 2016-09-28 | 顺德职业技术学院 | Energy-saving control method of twin-stage compression type heat pump vacuum freeze drying combined device |
| WO2020220989A1 (en) * | 2019-04-28 | 2020-11-05 | 青岛海尔智能技术研发有限公司 | Freezer device, refrigeration system, and control method therefor |
-
2022
- 2022-01-06 CN CN202210010416.6A patent/CN114413497B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002327690A (en) * | 2001-04-27 | 2002-11-15 | Daikin Ind Ltd | Two-stage compressor |
| JP2007147232A (en) * | 2005-11-30 | 2007-06-14 | Daikin Ind Ltd | Refrigerating device |
| JP2015132413A (en) * | 2014-01-10 | 2015-07-23 | ダイキン工業株式会社 | Refrigeration device |
| EP3018351A2 (en) * | 2014-11-05 | 2016-05-11 | Mitsubishi Heavy Industries, Ltd. | Two-stage-compression refrigerating cycle apparatus, and device and method for controlling the apparatus |
| CN105962005A (en) * | 2016-05-09 | 2016-09-28 | 顺德职业技术学院 | Energy-saving control method of twin-stage compression type heat pump vacuum freeze drying combined device |
| WO2020220989A1 (en) * | 2019-04-28 | 2020-11-05 | 青岛海尔智能技术研发有限公司 | Freezer device, refrigeration system, and control method therefor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116358204A (en) * | 2023-03-31 | 2023-06-30 | 珠海格力电器股份有限公司 | Compressor control method, storage box and storage medium |
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