CN112648714B - Constant temperature control method and system for air-cooled modular unit - Google Patents

Constant temperature control method and system for air-cooled modular unit Download PDF

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Publication number
CN112648714B
CN112648714B CN202011428842.9A CN202011428842A CN112648714B CN 112648714 B CN112648714 B CN 112648714B CN 202011428842 A CN202011428842 A CN 202011428842A CN 112648714 B CN112648714 B CN 112648714B
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temperature
fan
speed
speed interval
controlling
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CN112648714A (en
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蔡湛文
赖凤麟
蓝明国
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Guangdong Siukonda Air Conditioning Co ltd
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Guangdong Siukonda Air Conditioning Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Fuzzy Systems (AREA)
  • Thermal Sciences (AREA)
  • Mathematical Physics (AREA)
  • Fluid Mechanics (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

The invention relates to the technical field of air conditioners, in particular to a constant temperature control method and a system of an air cooling module unit, wherein the air cooling module unit comprises a shell-and-tube heat exchanger, a fan and a compressor; the shell-and-tube heat exchanger is characterized in that a first temperature sensor is arranged at the water inlet end of the shell-and-tube heat exchanger and used for detecting real-time water temperature, and the method comprises the following steps: acquiring a set target water temperature, a real-time water temperature and a current running state of a compressor; calculating the deviation between the target water temperature and the real-time water temperature, and controlling the compressor to keep running in the current running state when the deviation is within the threshold range; when the deviation exceeds the threshold range, determining the operation mode and the operation duration of the compressor according to the interval range of the deviation, and controlling the compressor to continuously operate for the operation duration according to the operation mode in the current operation state; the invention effectively ensures that the water temperature at the use side of the air cooling module unit is stable and constant, and avoids the problem of frequent start and stop of the air cooling module unit.

Description

Constant temperature control method and system for air-cooled modular unit
Technical Field
The invention relates to the technical field of air conditioners, in particular to a constant temperature control method and a constant temperature control system for an air cooling module unit.
Background
In order to realize the constant temperature control of the air-cooled modular unit, in the prior art, adjustment control is usually performed according to the water temperature of cooling water, however, the method often causes large water temperature fluctuation, and further causes the problems of frequent change of the whole temperature adjustment control mode, frequent start and stop of the air-cooled modular unit and the like; the problem of the reduction of the service life of the air-cooled modular unit is caused.
Disclosure of Invention
The invention provides a constant temperature control method and a constant temperature control system for an air-cooled modular unit, which are used for solving one or more technical problems in the prior art and at least providing a beneficial selection or creation condition.
In order to achieve the purpose, the invention provides the following technical scheme:
a constant temperature control method of an air-cooled modular unit comprises a shell-and-tube heat exchanger, a fan and a compressor; the shell-and-tube heat exchanger is characterized in that a first temperature sensor is arranged at the water inlet end of the shell-and-tube heat exchanger and used for detecting real-time water temperature, and the method comprises the following steps:
acquiring a set target water temperature, a real-time water temperature detected by a first temperature sensor and a current operation state of a compressor, wherein the current operation state is one of a refrigerating state and a heating state;
calculating the deviation of the target water temperature and the real-time water temperature, and controlling the compressor to keep running in the current running state when the deviation is within the threshold range;
when the deviation exceeds the threshold range, determining the operation mode and the operation duration of the compressor according to the interval range of the deviation, and controlling the compressor to continuously operate for the operation duration according to the operation mode in the current operation state; the operation mode of the compressor is one of loading operation and unloading operation, and the operation duration is positively correlated with the size of the interval range.
Further, the calculating a deviation between the target water temperature and the real-time water temperature, and controlling the compressor to keep running in the current state when the deviation is within a threshold range includes:
acquiring a set first loading threshold and a set first unloading threshold;
and if the (target water temperature-first unloading threshold value) < the real-time water temperature is less than or equal to (target water temperature + first loading threshold value), controlling the compressor to keep running in the current running state.
Further, when the deviation exceeds the threshold range, determining an operation mode and an operation duration of the compressor according to the interval range where the deviation is located, and controlling the compressor to continuously operate for the operation duration according to the operation mode in the current operation state includes:
acquiring a set second loading threshold, a set second unloading threshold, a set first loading period, a set second loading period, a set first unloading period and a set second unloading period;
if the (target water temperature + first loading threshold value) < the real-time water temperature is less than or equal to (target water temperature + second loading threshold value), determining the operation mode of the compressor as loading operation, wherein the operation time of the loading operation of the compressor is a first loading period, and controlling the time of the loading operation of the compressor according to the operation state for the first loading period;
if the real-time water temperature is greater than (the target water temperature + a second loading threshold), determining that the operation mode of the compressor is loading operation, wherein the operation time of the loading operation of the compressor is a second loading period, and controlling the time of the loading operation of the compressor according to the operation state for the second loading period;
if the target water temperature-second unloading threshold value is less than the real-time water temperature and less than or equal to the target water temperature-first unloading threshold value, determining the operation mode of the compressor as load shedding operation, wherein the operation time of the load shedding operation of the compressor is a first unloading period, and controlling the time of the load shedding operation of the compressor according to the operation state for the first unloading period;
if the real-time water temperature is less than (the target water temperature-a second unloading threshold value), determining that the operation mode of the compressor is unloading operation, and the operation time of the unloading operation of the compressor is a second unloading period, and controlling the time of the unloading operation of the compressor according to the operation state for the second unloading period;
the second loading threshold value is larger than the first loading threshold value, the second unloading threshold value is larger than the first unloading threshold value, the first loading period is larger than the second loading period, and the first unloading period is larger than the second unloading period.
Further, the fan includes a cooling fan and a heating fan, and the method further includes:
in a refrigerating state, acquiring an environment temperature and a high-speed temperature of a refrigerating fan, determining a speed interval of the refrigerating fan according to the environment temperature and the high-speed temperature of the refrigerating fan, and controlling the operation of the refrigerating fan according to the speed interval, wherein the speed interval of the refrigerating fan is one of a high-speed interval and a low-speed interval; the high-speed temperature of the refrigeration fan is a preset first threshold value;
in a heating state, acquiring an environment temperature and a high-speed temperature of a heating fan, determining a speed interval of the heating fan according to the environment temperature and the high-speed temperature of the heating fan, and controlling the operation of the heating fan according to the speed interval, wherein the speed interval of the heating fan is one of a high-speed interval and a low-speed interval; and the high-speed temperature of the heating fan is a preset second threshold value.
Further, the speed interval of the refrigeration fan is determined according to the environment temperature and the high-speed temperature of the refrigeration fan, and the operation of the refrigeration fan is controlled according to the speed interval, and the method specifically comprises the following steps:
when the air cooler is started, if the environmental temperature is more than or equal to the high-speed temperature of the refrigerating fan, controlling the refrigerating fan to operate in a high-speed interval; if the environmental temperature is less than the high-speed temperature of the refrigeration fan, controlling the refrigeration fan to operate in a low-speed region;
after the air cooler is started to operate, when the ambient temperature is more than or equal to the high-speed temperature of the air cooler plus 2 ℃, controlling the air cooler to operate in the current speed interval;
when the environmental temperature is less than or equal to the high-speed temperature of the refrigeration fan, if the refrigeration fan operates in a high-speed interval, the refrigeration fan is controlled to operate in a low-speed interval; if the refrigeration fan runs in a low-speed interval, controlling the refrigeration fan to stop running;
when the high-speed temperature of the refrigerating fan is less than the environment temperature and less than the high-speed temperature of the refrigerating fan plus 2 ℃, acquiring the temperature of all fins, the temperature of the refrigerating fan and the return difference temperature, determining the speed interval of the refrigerating fan according to the temperature of the fins, the temperature of the refrigerating fan and the return difference temperature, and controlling the operation of the refrigerating fan according to the speed interval.
Further, the speed interval of the refrigeration fan is determined according to the fin temperature, the refrigeration fan opening temperature and the return difference temperature, and the operation of the refrigeration fan is controlled according to the speed interval, and the method comprises the following steps:
when the refrigerating fan operates in a high-speed interval, if the temperature of all fins is less than or equal to the refrigerating fan starting temperature-the first return difference temperature of the refrigerating fan, controlling the refrigerating fan to operate in a low-speed interval;
when the refrigerating fan operates in a high-speed interval, if the temperature of any fin is more than or equal to the temperature of a refrigerating fan, controlling the refrigerating fan to continuously operate in the high-speed interval;
when the refrigerating fan operates in a low-speed interval, if the temperature of all fins is less than or equal to the refrigerating fan opening temperature-the first return temperature of the refrigerating fan, controlling the refrigerating fan to stop outputting;
when the refrigerating fan operates in a low-speed interval, if the temperature of any fin is larger than or equal to the temperature of the refrigerating fan, the refrigerating fan is controlled to continue to operate in the low-speed interval.
Further, the air-cooled module unit includes the finned heat exchanger, the finned heat exchanger is provided with second temperature sensor, second temperature sensor is used for detecting the fin temperature, according to ambient temperature and the interval of the speed of the fan that heats of the high-speed temperature determination of fan that heats, according to the operation of the fan that heats of speed interval control specifically includes:
when the air heater is started, if the environmental temperature is more than or equal to the high-speed temperature of the heating fan, controlling the heating fan to operate in a low-speed interval; if the environmental temperature is less than the high-speed temperature of the heating fan, controlling the heating fan to operate in a high-speed interval;
after the air heater is started to operate, when the environmental temperature is less than or equal to the high-speed temperature of the heating fan, namely minus 2 ℃, the heating fan is controlled to operate in the current speed interval;
when the environmental temperature is more than or equal to the high-speed temperature of the heating fan, if the heating fan operates in a high-speed interval, the heating fan is controlled to operate in a low-speed interval; if the heating fan runs in the low-speed interval, controlling the heating fan to stop running;
when the high-speed temperature of the heating fan is lower than-2 ℃ and lower than the high-speed temperature of the heating fan, acquiring the temperature of all fins, the temperature of the heating fan and the return difference temperature, determining the speed interval of the heating fan according to the temperature of the fins, the temperature of the heating fan and the return difference temperature, and controlling the operation of the heating fan according to the speed interval.
Further, the speed interval of the heating fan is determined according to the fin temperature, the heating fan temperature and the return difference temperature, and the operation of the heating fan is controlled according to the speed interval, including:
when the heating fan operates in a high-speed interval, if the temperature of all fins is more than or equal to the temperature of the heating starting fan and the second return difference temperature of the heating fan, controlling the heating fan to operate in a low-speed interval;
when the heating fan operates in a high-speed interval, if the temperature of any fin is less than or equal to the temperature of the heating fan, controlling the heating fan to operate in the high-speed interval;
when the heating fan operates in a low-speed interval, if the temperature of all fins is more than or equal to the heating fan temperature plus the second return difference temperature of the heating fan, controlling the heating fan to stop outputting;
when the heating fan operates in the low-speed interval, if the temperature of any fin is less than or equal to the temperature of the heating fan, the heating fan is controlled to operate in the low-speed interval.
Further, the method further comprises:
when a plurality of compressors in the air-cooled modular unit work simultaneously, the plurality of compressors in the air-cooled modular unit are sequentially subjected to defrosting treatment;
and when a plurality of air-cooled modular units work simultaneously, the compressors which are used for defrosting simultaneously do not exceed a set third threshold value.
The utility model provides a constant temperature control system of air-cooled modular unit, air-cooled modular unit include the fan and with the compressor that the fan links to each other, the fan includes refrigeration fan and heating fan, the system includes:
at least one processor;
at least one memory for storing at least one program;
when the at least one program is executed by the at least one processor, the at least one processor is enabled to implement the thermostatic control method of the air-cooled module unit.
The invention has the beneficial effects that: the invention discloses a constant temperature control method and a system of an air-cooled modular unit, which control and adjust the loading and unloading of a compressor in the air-cooled modular unit by detecting the water temperature, determine the operation mode and the operation time length of the compressor according to the deviation of the target water temperature and the real-time water temperature of the air-cooled modular unit, control the compressor to continuously operate the operation time length according to the operation mode in the current operation state, effectively ensure the stable and constant water temperature of the use side of the air-cooled modular unit by setting the operation time length and the size of the interval range to be positive correlation, and avoid the problem of frequent starting and stopping of the air-cooled modular unit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic flow chart of a constant temperature control method for an air-cooled modular unit according to an embodiment of the present invention.
Detailed Description
The conception, specific structure and technical effects of the present application will be described clearly and completely with reference to the following embodiments and the accompanying drawings, so that the purpose, scheme and effects of the present application can be fully understood. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Referring to fig. 1, fig. 1 shows a constant temperature control method for an air-cooled modular unit provided in an embodiment of the present application, where the air-cooled modular unit includes a shell-and-tube heat exchanger, a fan, and a compressor; the shell-and-tube heat exchanger is characterized in that a first temperature sensor is arranged at the water inlet end of the shell-and-tube heat exchanger and used for detecting real-time water temperature, and the method comprises the following steps:
s100, acquiring a set target water temperature TS, a real-time water temperature T detected by a first temperature sensor and a current operation state of a compressor, wherein the current operation state is one of a refrigerating state and a heating state;
s200, calculating the deviation between the target water temperature TS and the real-time water temperature T, and controlling the compressor to keep running in the current running state when the deviation is within the threshold range;
step S300, when the deviation exceeds a threshold value range, determining an operation mode and an operation duration of the compressor according to an interval range where the deviation is located, and controlling the compressor to continuously operate for the operation duration according to the operation mode in the current operation state;
the operation mode of the compressor is one of loading operation and unloading operation, and the operation duration is positively correlated with the size of the interval range.
In the embodiment provided by the invention, the air-cooled modular unit comprises a shell-and-tube heat exchanger, a finned heat exchanger, a fan and a compressor; the water inlet end of the shell-and-tube heat exchanger is provided with a first temperature sensor, the first temperature sensor is used for detecting real-time water temperature T, the fan, the compressor and the first temperature sensor are respectively connected with the processor, and the steps of the embodiment provided by the invention are executed by the processor.
In a modified embodiment, the step S200 includes:
acquiring a set first loading threshold TJ1 and a set first unloading threshold TX 1;
and if the (target water temperature TS-first unloading threshold TX1) < the real-time water temperature T is less than or equal to (target water temperature TS + first loading threshold TJ1), controlling the compressor to keep running in the current running state.
In a modified embodiment, the step S300 includes:
acquiring a set second loading threshold TJ2, a set second unloading threshold TX2, a set first loading period SJ1, a set second loading period SJ2, a set first unloading period SX1 and a set second unloading period SX 2;
if the real-time water temperature T is less than or equal to (the target water temperature TS + the first loading threshold TJ1) (the real-time water temperature T is less than or equal to (the target water temperature TS + the second loading threshold TJ2), determining that the operation mode of the compressor is loading operation, wherein the operation time of the loading operation of the compressor is a first loading period SJ1, and controlling the time of the loading operation of the compressor according to the operation state for the first loading period SJ 1;
if the real-time water temperature T > (the target water temperature TS + the second loading threshold value TJ2), determining that the operation mode of the compressor is loading operation, wherein the operation time of the loading operation of the compressor is a second loading period SJ2, and controlling the time of the loading operation of the compressor according to the operation state for the second loading period SJ 2;
if the target water temperature TS-the second unloading threshold TX2 is less than the real-time water temperature T and less than or equal to the target water temperature TS-the first unloading threshold TX1, determining that the operation mode of the compressor is unloading operation, wherein the operation duration of the unloading operation of the compressor is a first unloading period SX1, and controlling the duration of the unloading operation of the compressor according to the operation state for the first unloading period SX 1;
if the real-time water temperature T < (target water temperature TS-second unloading threshold value TX2), determining that the operation mode of the compressor is deloading operation, wherein the operation duration of the deloading operation of the compressor is a second unloading period SX2, and controlling the duration of the deloading operation of the compressor according to the operation state for the second unloading period SX 2;
the second loading threshold TJ2 is greater than the first loading threshold TJ1, the second unloading threshold TX2 is greater than the first unloading threshold TX1, the first loading period SJ1 is greater than the second loading period SJ2, and the first unloading period SX1 is greater than the second unloading period SX 2.
The following is a specific embodiment of step S300:
when the air cooling module compressor is in a refrigerating state:
if the real-time water temperature T is less than or equal to (the target water temperature TS + the first loading threshold TJ1) (the target water temperature TS-the first unloading threshold TX1), controlling the compressor to keep running in the current state;
if the real-time water temperature T is less than or equal to (the target water temperature TS + the first loading threshold TJ1) (the real-time water temperature T is less than or equal to (the target water temperature TS + the second loading threshold TJ2), controlling the time length of the first loading period SJ1 of the loading operation of the compressor in the refrigeration state;
if the real-time water temperature T > (the target water temperature TS + the second loading threshold TJ2), controlling the compressor to load and run for the duration of a second loading period SJ2 according to the refrigeration state;
if the target water temperature TS-the second unloading threshold TX2 is less than the real-time water temperature T and less than or equal to the target water temperature TS-the first unloading threshold TX1, controlling the compressor to carry out unloading operation for the duration of a first unloading period SX1 according to the refrigerating state;
if the real-time water temperature T is less than or equal to (the target water temperature TS-a second unloading threshold value TX2), controlling the compressor to carry out unloading operation according to the refrigeration state for the duration of a second unloading period SX 2;
when the air-cooling module compressor is in a heating state:
if the real-time water temperature T is less than or equal to (the target water temperature TS + the first loading threshold TJ1) (the target water temperature TS-the first unloading threshold TX1), controlling the compressor to keep running in the current state;
if the real-time water temperature T is less than or equal to (the target water temperature TS + the first loading threshold TJ1) (the real-time water temperature T is less than or equal to (the target water temperature TS + the second loading threshold TJ2), controlling the time length of the first loading period SJ1 of the loading operation of the compressor in the heating state;
if the real-time water temperature T > (the target water temperature TS + the second loading threshold TJ2), controlling the compressor to load and run for the duration of a second loading period SJ2 according to the heating state;
if the target water temperature TS-the second unloading threshold TX2 is less than the real-time water temperature T and less than or equal to the target water temperature TS-the first unloading threshold TX1, controlling the compressor to carry out unloading operation for the duration of a first unloading period SX1 according to the heating state;
and if the real-time water temperature T is less than or equal to (the target water temperature TS-the second unloading threshold TX2), controlling the compressor to carry out unloading operation according to the heating state for the duration of a second unloading period SX 2.
Referring to table 1, table 1 is a table corresponding to real-time water temperature of the air-cooled modular unit, an operation mode of the compressor and an operation duration in the specific embodiment of step S300;
Figure GDA0003508113760000071
table 1: a corresponding table of real-time water temperature of the air cooling module unit, operation mode and operation duration of the compressor;
in an improved embodiment, the fans include a cooling fan and a heating fan, and the method further includes:
in a refrigerating state, acquiring an environment temperature and a high-speed temperature of a refrigerating fan, determining a speed interval of the refrigerating fan according to the environment temperature and the high-speed temperature of the refrigerating fan, and controlling the operation of the refrigerating fan according to the speed interval, wherein the speed interval of the refrigerating fan is one of a high-speed interval and a low-speed interval; the high-speed temperature of the refrigeration fan is a preset first threshold value;
in a heating state, acquiring an environment temperature and a high-speed temperature of a heating fan, determining a speed interval of the heating fan according to the environment temperature and the high-speed temperature of the heating fan, and controlling the operation of the heating fan according to the speed interval, wherein the speed interval of the heating fan is one of a high-speed interval and a low-speed interval; and the high-speed temperature of the heating fan is a preset second threshold value.
In this embodiment, in order to guarantee that the temperature of water at the use side of the air cooling module unit is constant, the compression ratio of the compressor is maintained within a normal range by controlling the high-speed operation, the low-speed operation or the stop of the fan, so that the compressor is guaranteed to operate stably, and the constant water temperature is maintained.
In an improved embodiment, the air-cooled modular unit comprises a finned heat exchanger provided with a second temperature sensor for detecting a fin temperature TcpThe method comprises the following steps of determining the speed interval of the refrigeration fan according to the environment temperature and the high-speed temperature of the refrigeration fan, and controlling the operation of the refrigeration fan according to the speed interval, wherein the method specifically comprises the following steps:
when the air cooler is started, if the ambient temperature T ishjNot less than high-speed temperature T of refrigerating fanlgControlling the refrigeration fan to operate in a high-speed interval; if the ambient temperature Thj< high speed temperature T of refrigeration fanlgControlling the refrigeration fan to operate in a low-speed region;
after the air cooler is started to operate, when the ambient temperature ThjNot less than high-speed temperature T of refrigerating fanlgControlling the refrigerating fan to keep running in the current speed interval at +2 ℃;
when the ambient temperature ThjHigh-speed temperature T of refrigeration fan less than or equal tolgIf the refrigeration fan runs in a high-speed interval, controlling the refrigeration fan to run in a low-speed interval; if the refrigeration fan runs in a low-speed interval, controlling the refrigeration fan to stop running;
when the high-speed temperature T of the refrigeration fangs< ambient temperature Thj< high speed temperature T of refrigeration fanlgAt +2 deg.C, obtaining all fin temperatures, refrigeration fan-starting temperature and return difference temperature, according to the above-mentionedAnd determining the speed interval of the refrigerating fan according to the temperature of the fins, the temperature of the refrigerating fan and the return difference temperature, and controlling the operation of the refrigerating fan according to the speed interval.
The high-speed temperature of the refrigeration fan is a preset threshold value and is used as a threshold value for determining the speed interval of the refrigeration fan when the refrigeration fan is started; and the control device is used for adjusting the running speed of the refrigerating fan in the speed interval after the refrigerating fan is started to run. The refrigerating fan can run at high speed or low speed in a high-speed interval, and can run at low speed or stop in a low-speed interval.
In the embodiment provided by the invention, the finned heat exchanger can be provided with one or more second temperature sensors, and the one or more second temperature sensors are used for detecting the temperature T of one or more finscpAnd the second temperature sensor is connected with the processor. The second temperature sensor is connected with a processor, and the steps of the embodiment provided by the invention are executed by the processor.
In an improved embodiment, the determining a speed interval of the refrigeration fan according to the fin temperature, the refrigeration fan temperature and the return difference temperature, and controlling the operation of the refrigeration fan according to the speed interval includes:
when the refrigerating fan operates in a high-speed interval, if the temperature T of all the fins is highcpTemperature T of refrigeration fanlk-first return difference temperature T of refrigeration fanlhControlling the refrigeration fan to operate in a low-speed interval;
when the refrigerating fan operates in a high-speed interval, if the temperature T of any fin is higher than the temperature T of the other fincpNot less than the temperature T of the refrigeration fanlkControlling the refrigeration fan to continuously operate in a high-speed interval;
when the refrigerating fan operates in a low-speed interval, if the temperature T of all the fins is higher than the temperature T of all the finscpTemperature T of refrigeration fanlk-first return difference temperature T of refrigeration fanlhAnd controlling the refrigerating fan to stop outputting.
When the refrigerating fan operates in a low-speed interval, if the temperature T of any fin is higher than the temperature T of the other fincpNot less than the temperature T of the refrigeration fanlkThen controlling the refrigeration fan to be continuously lowAnd (5) operating in a speed interval.
And the temperature of the refrigerating fan is used as a threshold value for adjusting the speed interval of the refrigerating fan.
In an improved embodiment, the determining a speed interval of the heating fan according to the ambient temperature and the high-speed temperature of the heating fan, and controlling the operation of the heating fan according to the speed interval specifically includes:
when the air heater is started, if the ambient temperature T ishjHigh-speed temperature T of not less than heating fanrgControlling the heating fan to operate in a low-speed interval; if the ambient temperature ThjHigh speed temperature T of heating fanrgControlling the heating fan to operate in a high-speed interval;
after the air heater is started to operate, when the ambient temperature T ishjHigh-speed temperature T of heating fan less than or equal torgControlling the heating fan to operate in the current speed interval at the temperature of-2 ℃;
when the ambient temperature ThjHigh-speed temperature T of not less than heating fanrgIf the heating fan runs in a high-speed interval, controlling the heating fan to run in a low-speed interval; if the heating fan runs in the low-speed interval, controlling the heating fan to stop running;
when the high-speed temperature T of the heating fanrg-2 ℃ below < ambient temperature ThjHigh-speed temperature T of < heating and heating fanrgAnd during the operation, acquiring the temperatures of all the fins, the temperature of the heating fan and the return difference temperature, determining the speed interval of the heating fan according to the temperatures of the fins, the temperature of the heating fan and the return difference temperature, and controlling the operation of the heating fan according to the speed interval.
The high-speed temperature of the heating fan is used as a threshold value for determining the speed interval of the heating fan when the heating fan is started; and the control device is used for adjusting the running speed of the heating fan in the speed interval after the heating fan is started to run. The heating fan can realize high-speed operation or low-speed operation in a high-speed interval, and can realize low-speed operation or stop in a low-speed interval.
In an improved embodiment, the determining a speed interval of the heating fan according to the fin temperature, the heating fan temperature and the return difference temperature, and controlling the operation of the heating fan according to the speed interval includes:
when the heating fan operates in the high-speed region, if all the fins have the temperature TcpTemperature T of not less than heating fanrk+ second return difference temperature T of heating fanrhControlling the heating fan to operate in a low-speed interval;
when the heating fan operates in a high-speed interval, if the temperature T of any fin is higher than the temperature T of the other fincpHeating fan temperature T is less than or equal torkControlling the heating fan to operate in a high-speed interval;
when the heating fan operates in the low-speed region, if all the fins have the temperature TcpTemperature T of not less than heating fanrk+ second return difference temperature T of heating fanrhControlling the heating fan to stop outputting;
when the heating fan operates in a low-speed region, if the temperature T of any fin is higher than the temperature T of the other fincpHeating fan temperature T is less than or equal torkAnd controlling the heating fan to operate in a low-speed interval.
The heating fan temperature is a preset threshold value and is used as a threshold value for adjusting the speed interval of the heating fan.
In an improved embodiment, the method further comprises:
when a plurality of compressors in the air-cooled modular unit work simultaneously, the plurality of compressors in the air-cooled modular unit are sequentially subjected to defrosting treatment;
and when a plurality of air-cooled modular units work simultaneously, the compressors which are used for defrosting simultaneously do not exceed a set third threshold value.
In this embodiment, one air-cooled modular unit includes at least 2 compressors, and in order to prevent water temperature fluctuation caused by defrosting of the air-cooled modular unit, a plurality of compressors in the air-cooled modular unit are first sorted according to whether a defrosting condition is satisfied, one compressor satisfying the defrosting condition is sequentially controlled to perform defrosting processing first, and the remaining compressors continue to operate, and defrosting is not performed sequentially until the last compressor finishes defrosting. When a plurality of air-cooled modular units are combined, the number of compressors for defrosting at the same time is limited.
Corresponding to the method in fig. 1, an embodiment of the present invention further provides a thermostatic control system for an air-cooled modular unit, where the system includes:
at least one processor;
at least one memory for storing at least one program;
when the at least one program is executed by the at least one processor, the at least one processor is enabled to implement the thermostatic control method of the air-cooled module unit according to any one of the above embodiments.
In the embodiment provided by the invention, the air-cooled modular unit comprises a shell-and-tube heat exchanger, a finned heat exchanger, a fan and a compressor; the shell-and-tube heat exchanger is characterized in that a first temperature sensor is arranged at the water inlet end of the shell-and-tube heat exchanger and used for detecting real-time water temperature T, a second temperature sensor is arranged on the finned heat exchanger and used for detecting finned temperature TcpAnd the fan, the compressor, the first temperature sensor and the second temperature sensor are respectively connected with the processor.
The contents in the above method embodiments are all applicable to the present system embodiment, the functions specifically implemented by the present system embodiment are the same as those in the above method embodiment, and the beneficial effects achieved by the present system embodiment are also the same as those achieved by the above method embodiment.
The Processor 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, a discrete Gate or transistor logic device, a discrete hardware component, or the like. The general processor may be a microprocessor or the processor may be any conventional processor or the like, the processor is a control center of the thermostat control system of the air-cooled modular unit, and various interfaces and lines are used to connect various parts of the thermostat control system operable device of the whole air-cooled modular unit.
The memory can be used for storing the computer programs and/or modules, and the processor realizes various functions of the constant temperature control system of the air-cooling module unit by running or executing the computer programs and/or modules stored in the memory and calling the data stored in the memory. The memory 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 by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart-Media-Card (SMC), a Secure-Digital (SD) Card, a Flash-memory Card (Flash-Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
While the description of the present application has been made in considerable detail and with particular reference to a few illustrated embodiments, it is not intended to be limited to any such details or embodiments or any particular embodiments, but it is to be construed that the present application effectively covers the intended scope of the application by reference to the appended claims, which are interpreted in view of the broad potential of the prior art. Further, the foregoing describes the present application in terms of embodiments foreseen by the inventor for which an enabling description was available, notwithstanding that insubstantial changes from the present application, not presently foreseen, may nonetheless represent equivalents thereto.

Claims (8)

1. A constant temperature control method of an air cooling modular unit is characterized in that the air cooling modular unit comprises a shell-and-tube heat exchanger, a fan and a compressor; the shell-and-tube heat exchanger is characterized in that a first temperature sensor is arranged at the water inlet end of the shell-and-tube heat exchanger and used for detecting real-time water temperature, and the method comprises the following steps:
acquiring a set target water temperature, a real-time water temperature detected by a first temperature sensor and a current operation state of a compressor, wherein the current operation state is one of a refrigerating state and a heating state;
calculating the deviation of the target water temperature and the real-time water temperature, and controlling the compressor to keep running in the current running state when the deviation is within the threshold range;
when the deviation exceeds the threshold range, determining the operation mode and the operation duration of the compressor according to the interval range of the deviation, and controlling the compressor to continuously operate for the operation duration according to the operation mode in the current operation state; the operation mode of the compressor is one of loading operation and unloading operation, and the operation duration is positively correlated with the size of the interval range;
wherein, the calculating the deviation between the target water temperature and the real-time water temperature, and when the deviation is within the threshold value range, controlling the compressor to keep running at the current state comprises the following steps:
acquiring a set first loading threshold and a set first unloading threshold;
if the real-time water temperature is less than or equal to (the target water temperature plus the first loading threshold value) (the target water temperature-the first unloading threshold value), controlling the compressor to keep running in the current running state;
when the deviation exceeds the threshold range, determining the operation mode and the operation duration of the compressor according to the interval range where the deviation is located, and controlling the compressor to continuously operate for the operation duration according to the operation mode in the current operation state, wherein the operation duration comprises the following steps:
acquiring a set second loading threshold, a set second unloading threshold, a set first loading period, a set second loading period, a set first unloading period and a set second unloading period;
if the (target water temperature + first loading threshold value) < the real-time water temperature is less than or equal to (target water temperature + second loading threshold value), determining the operation mode of the compressor as loading operation, wherein the operation time of the loading operation of the compressor is a first loading period, and controlling the time of the loading operation of the compressor according to the operation state for the first loading period;
if the real-time water temperature is greater than (the target water temperature + a second loading threshold), determining that the operation mode of the compressor is loading operation, wherein the operation time of the loading operation of the compressor is a second loading period, and controlling the time of the loading operation of the compressor according to the operation state for the second loading period;
if the target water temperature-second unloading threshold value is less than the real-time water temperature and less than or equal to the target water temperature-first unloading threshold value, determining the operation mode of the compressor as load shedding operation, wherein the operation time of the load shedding operation of the compressor is a first unloading period, and controlling the time of the load shedding operation of the compressor according to the operation state for the first unloading period;
if the real-time water temperature is less than (the target water temperature-a second unloading threshold value), determining that the operation mode of the compressor is unloading operation, and the operation time of the unloading operation of the compressor is a second unloading period, and controlling the time of the unloading operation of the compressor according to the operation state for the second unloading period;
the second loading threshold value is larger than the first loading threshold value, the second unloading threshold value is larger than the first unloading threshold value, the first loading period is larger than the second loading period, and the first unloading period is larger than the second unloading period.
2. The thermostatic control method of an air-cooled modular unit as set forth in claim 1, wherein the fans include a cooling fan and a heating fan, the method further comprising:
in a refrigerating state, acquiring an environment temperature and a high-speed temperature of a refrigerating fan, determining a speed interval of the refrigerating fan according to the environment temperature and the high-speed temperature of the refrigerating fan, and controlling the operation of the refrigerating fan according to the speed interval, wherein the speed interval of the refrigerating fan is one of a high-speed interval and a low-speed interval; the high-speed temperature of the refrigeration fan is a preset first threshold value;
in a heating state, acquiring an environment temperature and a high-speed temperature of a heating fan, determining a speed interval of the heating fan according to the environment temperature and the high-speed temperature of the heating fan, and controlling the operation of the heating fan according to the speed interval, wherein the speed interval of the heating fan is one of a high-speed interval and a low-speed interval; and the high-speed temperature of the heating fan is a preset second threshold value.
3. The constant temperature control method of the air cooling module unit according to claim 2, wherein the speed interval of the cooling fan is determined according to the ambient temperature and the high speed temperature of the cooling fan, and the operation of the cooling fan is controlled according to the speed interval, specifically comprising:
when the air cooler is started, if the environmental temperature is more than or equal to the high-speed temperature of the refrigerating fan, controlling the refrigerating fan to operate in a high-speed interval; if the environmental temperature is less than the high-speed temperature of the refrigeration fan, controlling the refrigeration fan to operate in a low-speed region;
after the air cooler is started to operate, when the ambient temperature is more than or equal to the high-speed temperature of the air cooler plus 2 ℃, controlling the air cooler to operate in the current speed interval;
when the environmental temperature is less than or equal to the high-speed temperature of the refrigeration fan, if the refrigeration fan operates in a high-speed interval, the refrigeration fan is controlled to operate in a low-speed interval; if the refrigeration fan runs in a low-speed interval, controlling the refrigeration fan to stop running;
when the high-speed temperature of the refrigerating fan is less than the environment temperature and less than the high-speed temperature of the refrigerating fan plus 2 ℃, acquiring the temperature of all fins, the temperature of the refrigerating fan and the return difference temperature, determining the speed interval of the refrigerating fan according to the temperature of the fins, the temperature of the refrigerating fan and the return difference temperature, and controlling the operation of the refrigerating fan according to the speed interval.
4. The constant temperature control method of the air cooling module unit as claimed in claim 3, wherein the step of determining the speed interval of the cooling fan according to the fin temperature, the cooling fan opening temperature and the return difference temperature and controlling the operation of the cooling fan according to the speed interval comprises the following steps:
when the refrigerating fan operates in a high-speed interval, if the temperature of all fins is less than or equal to the refrigerating fan starting temperature-the first return difference temperature of the refrigerating fan, controlling the refrigerating fan to operate in a low-speed interval;
when the refrigerating fan operates in a high-speed interval, if the temperature of any fin is more than or equal to the temperature of a refrigerating fan, controlling the refrigerating fan to continuously operate in the high-speed interval;
when the refrigerating fan operates in a low-speed interval, if the temperature of all fins is less than or equal to the refrigerating fan opening temperature-the first return temperature of the refrigerating fan, controlling the refrigerating fan to stop outputting;
when the refrigerating fan operates in a low-speed interval, if the temperature of any fin is larger than or equal to the temperature of the refrigerating fan, the refrigerating fan is controlled to continue to operate in the low-speed interval.
5. The constant temperature control method of the air-cooled modular unit according to claim 2, wherein the air-cooled modular unit comprises a finned heat exchanger, the finned heat exchanger is provided with a second temperature sensor, the second temperature sensor is used for detecting a fin temperature, the speed interval of the heating fan is determined according to the ambient temperature and the high-speed temperature of the heating fan, and the operation of the heating fan is controlled according to the speed interval, specifically comprising:
when the air heater is started, if the environmental temperature is more than or equal to the high-speed temperature of the heating fan, controlling the heating fan to operate in a low-speed interval; if the environmental temperature is less than the high-speed temperature of the heating fan, controlling the heating fan to operate in a high-speed interval;
after the air heater is started to operate, when the environmental temperature is less than or equal to the high-speed temperature of the heating fan, namely minus 2 ℃, the heating fan is controlled to operate in the current speed interval;
when the environmental temperature is more than or equal to the high-speed temperature of the heating fan, if the heating fan operates in a high-speed interval, the heating fan is controlled to operate in a low-speed interval; if the heating fan runs in the low-speed interval, controlling the heating fan to stop running;
when the high-speed temperature of the heating fan is lower than-2 ℃ and lower than the high-speed temperature of the heating fan, acquiring the temperature of all fins, the temperature of the heating fan and the return difference temperature, determining the speed interval of the heating fan according to the temperature of the fins, the temperature of the heating fan and the return difference temperature, and controlling the operation of the heating fan according to the speed interval.
6. The constant temperature control method of the air cooling module unit as claimed in claim 5, wherein the determining of the speed interval of the heating fan according to the fin temperature, the heating fan temperature and the return difference temperature, and the controlling of the operation of the heating fan according to the speed interval comprises:
when the heating fan operates in a high-speed interval, if the temperature of all fins is more than or equal to the temperature of the heating starting fan and the second return difference temperature of the heating fan, controlling the heating fan to operate in a low-speed interval;
when the heating fan operates in a high-speed interval, if the temperature of any fin is less than or equal to the temperature of the heating fan, controlling the heating fan to operate in the high-speed interval;
when the heating fan operates in a low-speed interval, if the temperature of all fins is more than or equal to the heating fan temperature plus the second return difference temperature of the heating fan, controlling the heating fan to stop outputting;
when the heating fan operates in the low-speed interval, if the temperature of any fin is less than or equal to the temperature of the heating fan, the heating fan is controlled to operate in the low-speed interval.
7. The thermostatic control method of an air-cooled modular unit as set forth in claim 1, further comprising:
when a plurality of compressors in the air-cooled modular unit work simultaneously, the plurality of compressors in the air-cooled modular unit are sequentially subjected to defrosting treatment;
and when a plurality of air-cooled modular units work simultaneously, the compressors which are used for defrosting simultaneously do not exceed a set third threshold value.
8. A thermostatic control system of an air-cooled modular unit, the system comprising:
at least one processor;
at least one memory for storing at least one program;
when the at least one program is executed by the at least one processor, the at least one processor is caused to implement the thermostatic control method of the air-cooled module group according to any one of claims 1 to 7.
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Denomination of invention: A constant temperature control method and system for air-cooled modular units

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