CN116045454A - Heat storage defrosting control device, control method and computer readable storage medium - Google Patents

Heat storage defrosting control device, control method and computer readable storage medium Download PDF

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Publication number
CN116045454A
CN116045454A CN202211634506.9A CN202211634506A CN116045454A CN 116045454 A CN116045454 A CN 116045454A CN 202211634506 A CN202211634506 A CN 202211634506A CN 116045454 A CN116045454 A CN 116045454A
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China
Prior art keywords
defrosting
air conditioning
conditioning system
heat storage
heat exchanger
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CN202211634506.9A
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Chinese (zh)
Inventor
肖俊钊
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Guangdong Kaili Hvac Co ltd
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Guangdong Kaili Hvac Co ltd
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Priority to CN202211634506.9A priority Critical patent/CN116045454A/en
Publication of CN116045454A publication Critical patent/CN116045454A/en
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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
    • F24F11/30—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
    • F24F11/65—Electronic processing for selecting an operating mode
    • 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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • 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 provides a heat accumulation defrosting control device, a control method and a computer readable storage medium of an air conditioning system, comprising an outdoor heat exchanger outlet temperature acquisition module; the timing module counts the duration T that the outlet temperature of the outdoor heat exchanger is smaller than a first preset value; the judging module is used for judging whether the air conditioning system runs a heating mode, whether the heat storage entering condition is met or not and whether the defrosting entering condition is met or not; the heat storage entering conditions are as follows: the outlet temperature of the outdoor heat exchanger is smaller than a second preset value or the duration T is not smaller than a first duration threshold value; the defrosting entering conditions are as follows: whether the outlet temperature of the outdoor heat exchanger is smaller than a third preset value or whether the duration T is larger than a second duration threshold; the control module is used for controlling the air conditioning system to enter a heat storage mode when the air conditioning system meets heat storage entering conditions; and when the defrosting entering condition is met, controlling the air conditioning system to exit the heat storage mode and enter the defrosting mode. According to the invention, the indoor unit and the air conditioner piping are heated to store heat by virtue of the heat storage mode, so that the defrosting time is effectively shortened.

Description

Heat storage defrosting control device, control method and computer readable storage medium
Technical Field
The invention relates to the field of air conditioners, in particular to a heat storage defrosting control device, a control method and a computer readable storage medium.
Background
The multi-split defrosting experimental test data show that the defrosting time of a long piping is about 13.04% -19.17% shorter than that of a short piping under the same external machine configuration and internal machine configuration conditions by the same defrosting control program. The reason is deeply analyzed, the long piping has considerable heat storage capacity due to the large accumulated volume of the piping, and the heat storage of the piping can melt and frost during defrosting to provide a considerable heat source. The lack of heat storage defrosting program control in the existing multi-split system defrosting control adopting direct switching mode defrosting is a main source for long defrosting time.
The existing multi-split air conditioner system defrosting control generally adopts direct switching mode defrosting and adopts special material heat storage and heat release defrosting. The direct switching mode has longer defrosting time, the inner side can not supply heat for a long time, and the comfort is poor. The auxiliary structure of the heat storage, heat release and defrosting by adopting the special material has larger volume and higher design cost, so that the large-scale market popularization is difficult.
Disclosure of Invention
In order to solve the problems, the invention provides a heat storage defrosting control device, a control method and a computer readable storage medium, which improve the heating and heat storage of an indoor heat exchanger and a piping by controlling an optimization program, effectively shorten defrosting time and improve defrosting efficiency.
The invention provides a heat accumulation defrosting control device of an air conditioning system, which comprises a temperature acquisition module, a control module and a control module, wherein the temperature acquisition module acquires the outlet temperature of an outdoor heat exchanger in real time; the timing module counts the duration T that the outlet temperature of the outdoor heat exchanger is smaller than a first preset value; the judging module is used for judging whether the air conditioning system operates a heating mode, judging whether the air conditioning system meets heat storage entering conditions and judging whether the air conditioning system meets defrosting entering conditions; wherein, the heat accumulation entering condition is: the outlet temperature of the outdoor heat exchanger is smaller than a second preset value or the duration T is not smaller than a first duration threshold value; the defrosting entering conditions are as follows: whether the outlet temperature of the outdoor heat exchanger is smaller than a third preset value or whether the duration T is larger than a second duration threshold; the first time length threshold is a preset longest defrosting time, and the second time length threshold is larger than the first time length threshold; sequentially reducing the first preset value, the second preset value and the third preset value; the control module is used for controlling the air conditioning system to enter a heat storage mode when the air conditioning system meets heat storage entering conditions; and when the air conditioning system meets the defrosting entering condition, controlling the air conditioning system to exit the heat storage mode and enter the defrosting mode.
According to the invention, the outlet temperature of the outdoor heat exchanger is monitored in real time, different control measures are adopted according to different outlet temperatures of the outdoor heat exchanger or the time length that the outlet temperature of the outdoor heat exchanger is lower than a preset value, and defrosting is performed in a layered manner, so that the heat storage of an air conditioning system can be improved, the defrosting efficiency is improved, the defrosting time is shortened, and the indoor comfort caused by long-time defrosting is avoided.
In an alternative technical scheme of the invention, the air conditioning system comprises a compressor, an oil separator, a four-way valve, an indoor unit, a throttling element, an outdoor heat exchanger and a gas-liquid separator which are sequentially connected to form a refrigerant circulation loop, wherein the indoor unit comprises a plurality of sub-indoor units which are arranged in parallel, each sub-indoor unit is internally provided with an inner fan and an electronic expansion valve, an outlet of the outdoor heat exchanger is provided with a temperature acquisition module, and the temperature acquisition module is an outlet temperature sensing bag of the outdoor heat exchanger.
According to the technical scheme, the air conditioning system is simple in structure, and the heat storage defrosting control device can be suitable for different air conditioning systems and is wide in application range.
In the optional technical scheme of the invention, under the heat storage mode, the windshield of the inner fan of the sub indoor unit in the starting state is forcedly reduced to the lowest windshield; and controlling the electronic expansion valve of the sub-indoor unit in the closed state to be opened to a fixed opening degree, and keeping the corresponding inner fan closed.
According to the technical scheme, in the heat storage mode, the windshield of the inner fan of the sub-indoor unit in the starting state is forcedly reduced to the lowest windshield, so that heat loss in the sub-indoor unit can be reduced, and heat storage in the sub-indoor unit is improved; the electronic expansion valve of the indoor unit in the closed state is controlled to be opened to a fixed opening degree, the corresponding inner fan is kept closed, high-temperature refrigerants can be guaranteed to enter the indoor unit for heat storage, the heat storage capacity of an air conditioning system is improved, when defrosting is carried out, the high-temperature refrigerants in the open state and the closed state can flow to the outdoor heat exchanger, the defrosting capacity of the outdoor heat exchanger is improved, and the defrosting time is shortened.
In an optional technical scheme of the invention, the outdoor environment temperature acquisition module is further included for acquiring the outdoor environment temperature; the preset module is used for presetting the longest defrosting time corresponding to different outdoor environment temperatures; the control module determines a first time threshold according to a mapping relationship between outdoor ambient temperature and a maximum defrosting time.
According to the technical scheme, the corresponding longest defrosting time is different under different outdoor environment temperatures, so that when the heat storage and defrosting judgment is executed, the accuracy of entering a heat storage and defrosting time node is improved, heat storage and defrosting are timely carried out, and the user experience is improved; meanwhile, the phenomenon that the normal use of the outdoor heat exchanger is influenced due to the fact that a frost layer is too thick due to frequent heat accumulation and defrosting or long-time non-execution of heat accumulation and defrosting is avoided.
The invention also provides a heat storage defrosting control method of the air conditioning system, which comprises the following steps: judging whether the air conditioning system operates a heating mode or not; under the operation heating mode of the air conditioning system, the outlet temperature of the outdoor heat exchanger is obtained in real time; judging whether the outlet temperature of the outdoor heat exchanger is smaller than a first preset value or not, and counting the duration T that the outlet temperature of the outdoor heat exchanger is smaller than the first preset value; judging whether the air conditioning system meets the heat storage entering condition, and controlling the air conditioning system to enter a heat storage mode when the air conditioning system meets the heat storage entering condition; judging whether the air conditioning system meets defrosting entering conditions, controlling the air conditioning system to exit a heat storage mode when the air conditioning system meets the defrosting entering conditions, and entering a defrosting mode; wherein, the heat accumulation entering condition is: the outlet temperature of the outdoor heat exchanger is smaller than a second preset value or the duration T is not smaller than a first duration threshold value; the defrosting entering conditions are as follows: whether the outlet temperature of the outdoor heat exchanger is smaller than a third preset value or whether the duration T is larger than a second duration threshold; the first time length threshold is a preset longest defrosting time, and the second time length threshold is larger than the first time length threshold; the first preset value, the second preset value and the third preset value are sequentially reduced.
In an alternative embodiment of the present invention, the first preset value is 0 ℃, the first preset value is-9 ℃, and the third preset value is-12 ℃.
According to the technical scheme, when the temperature of the outlet of the outdoor heat exchanger is lower than 0 ℃, timing is started, heat accumulation is started when the temperature of the outlet of the outdoor heat exchanger is lower than-9 ℃, heat is accumulated for later defrosting, a defrosting program is executed when the temperature of the outlet of the outdoor heat exchanger is lower than-12 ℃, the temperature of the outlet of the outdoor heat exchanger is monitored in real time, and according to the counted time length of the timing module or the temperature of the outlet of the outdoor heat exchanger, the temperature of the outlet of the outdoor heat exchanger is controlled to be lower than a specified value and the defrosting program is executed for a specified time, so that the overlength of frosting time can be avoided, the thickness of the frosting layer is caused, and the defrosting time is prolonged.
In an alternative technical scheme of the invention, the air conditioning system comprises a compressor, an oil separator, a four-way valve, an indoor unit, a throttling element, an outdoor heat exchanger and a gas-liquid separator which are sequentially connected to form a refrigerant circulation loop, wherein the indoor unit comprises a plurality of sub-indoor units which are arranged in parallel, each sub-indoor unit is correspondingly provided with an indoor fan, and an outlet of the outdoor heat exchanger is provided with an outlet temperature sensing bulb of the outdoor heat exchanger.
In the optional technical scheme of the invention, in the heat storage mode, the control module controls to send an instruction to the indoor unit: forcibly reducing the windshield of the inner fan of the sub indoor unit in the starting state to the lowest windshield; and controlling the electronic expansion valve of the sub-indoor unit in the closed state to be opened to a fixed opening degree, and keeping the corresponding inner fan closed.
The invention also comprises the steps of obtaining the outdoor environment temperature; presetting maximum defrosting time corresponding to different outdoor environment temperatures; and determining a first time threshold according to the mapping relation between the outdoor environment temperature and the longest defrosting time.
The invention further provides a computer readable storage medium, which comprises a memory, wherein the memory stores a computer program, and the computer program executes the heat accumulation defrosting control method.
Drawings
Fig. 1 is a schematic structural view of a heat storage defrosting control device according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an air conditioning system according to an embodiment of the present invention.
Fig. 3 is a schematic flow chart of a heat storage defrosting control method in an embodiment of the invention.
Reference numerals:
a temperature acquisition module 1; a timing module 2; a judgment module 3; a control module 4; compressor 51, oil separator 52, four-way valve 53, sub-indoor unit 54, throttle element 55, outdoor heat exchanger 56, gas-liquid separator 57; a one-way valve 58; an oil return capillary 59; an outdoor ambient temperature acquisition module 6; the module 7 is preset.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides a heat storage defrosting control device of an air conditioning system, which includes a temperature acquisition module 1 for acquiring an outlet temperature T1 of an outdoor heat exchanger in real time; the timing module 2 counts the duration T that the outlet temperature T1 of the outdoor heat exchanger is smaller than a first preset value; a judging module 3 for judging whether the air conditioning system operates the heating mode, judging whether the air conditioning system meets the heat storage entering condition, and judging whether the air conditioning system meets the defrosting entering condition; wherein, the heat accumulation entering condition is: the outlet temperature T1 of the outdoor heat exchanger is smaller than a second preset value or the duration T is not smaller than a first duration threshold; the defrosting entering conditions are as follows: whether the outdoor heat exchanger outlet temperature T1 is smaller than a third preset value or whether the duration T is larger than a second duration threshold; the first time length threshold is a preset longest defrosting time, and the second time length threshold is larger than the first time length threshold; sequentially reducing the first preset value, the second preset value and the third preset value; the control module 4 is used for controlling the air conditioning system to enter a heat storage mode when the air conditioning system meets heat storage entering conditions; and when the air conditioning system meets the defrosting entering condition, controlling the air conditioning system to exit the heat storage mode and enter the defrosting mode.
According to the invention, through monitoring the outlet temperature T1 of the outdoor heat exchanger in real time and adopting different control measures according to the difference of the outlet temperature T1 of the outdoor heat exchanger or the duration that the outlet temperature T1 of the outdoor heat exchanger is lower than a preset value, the heat storage of an air conditioning system can be improved, the defrosting efficiency is improved, the defrosting time is shortened, and the indoor comfort caused by long-time defrosting is avoided.
In a preferred embodiment of the present invention, as shown in fig. 2, the air conditioning system includes a compressor 51, an oil separator 52, a four-way valve 53, an indoor unit, a throttling element 55, an outdoor heat exchanger 56, and a gas-liquid separator 57, which are sequentially connected to form a refrigerant circulation loop, wherein the indoor unit includes a plurality of sub indoor units 54 arranged in parallel, each sub indoor unit 54 is internally provided with an internal fan (not shown in the figure) and an electronic expansion valve (not shown in the figure), an outlet of the outdoor heat exchanger 56 is provided with a temperature acquisition module 1, and the temperature acquisition module 1 is an outlet bulb of the outdoor heat exchanger. Further, the compressor further comprises a check valve 58 and an oil return capillary 59, wherein the check valve 58 is connected in parallel to two sides of the throttling element 55, the check valve 58 is conducted during refrigeration and is not conducted during heating, and two ends of the oil return capillary 59 are respectively communicated with an oil return port of the compressor 51 and an outlet of the oil separator 52. In the embodiment of the invention, the air conditioning system is simple in structure, and the heat storage defrosting control device can be suitable for different air conditioning systems and is wide in application range.
In a preferred embodiment of the present invention, in the heat storage mode, the damper of the inner fan of the sub indoor unit 54 in the on state is controlled to be forcibly lowered to the lowest damper; the electronic expansion valve of the sub-indoor unit 54 in the off state is controlled to be opened to a fixed opening degree, and the corresponding inner fan is kept closed.
By the mode, in the heat storage mode, the windshield of the inner fan of the sub-indoor unit in the starting state is forcedly reduced to the lowest windshield, so that heat loss in the sub-indoor unit can be reduced, and heat storage in the sub-indoor unit is improved; the electronic expansion valve of the sub-indoor unit in the shutdown state is controlled to be opened to a fixed opening degree, the corresponding inner fan is kept closed, the high-temperature refrigerant can be guaranteed to enter the sub-indoor unit to store heat, the heat storage capacity of an air conditioning system is improved, when defrosting is carried out, the high-temperature refrigerant in the sub-indoor unit 54 in the startup state and the shutdown state can flow to the outdoor heat exchanger 56, the defrosting capacity of the outdoor heat exchanger 56 is improved, and the defrosting time is shortened.
In a preferred embodiment of the present invention, the outdoor environment temperature acquiring module 6 is further included to acquire an outdoor environment temperature; the presetting module 7 is used for presetting the longest defrosting time/first time threshold corresponding to different outdoor environment temperatures; the control module 4 determines the first time threshold according to the mapping between the outdoor ambient temperature and the maximum defrosting time/first time threshold.
By the mode, the corresponding longest defrosting time is different under different outdoor environment temperatures, so that when the heat storage and defrosting judgment is executed, the accuracy of entering the heat storage and defrosting time node is improved, the heat storage and defrosting are timely carried out, and the user experience is improved; meanwhile, the phenomenon that the normal use of the outdoor heat exchanger 56 is affected due to excessively thick frost layer caused by frequent heat accumulation and defrosting or long-time non-execution of heat accumulation and defrosting is avoided.
Referring to fig. 3, the present invention further provides a heat storage defrosting control method for an air conditioning system, comprising the following steps:
s101, detecting that the compressor 51 is operated, and entering S102;
s102, judging whether an air conditioning system operates a heating mode or not; the heating mode proceeds to S103. The cooling mode returns to S101 operation.
S103, under the operation heating mode of the air conditioning system, acquiring the outlet temperature T1 of the outdoor heat exchanger in real time; it is judged whether or not the outdoor heat exchanger outlet temperature T1 is less than a first preset value, satisfying the operation of proceeding to S104. Otherwise, the operation returns to S102.
S104, counting the duration T that the outlet temperature T1 of the outdoor heat exchanger is smaller than a first preset value; enter S105;
s105, judging whether the air conditioning system meets the heat storage entering condition, and controlling the air conditioning system to enter a heat storage mode when the air conditioning system meets the heat storage entering condition; the heat storage entering conditions are as follows: the outlet temperature T1 of the outdoor heat exchanger is smaller than a second preset value or the duration T is not smaller than a first duration threshold; operation S106 is satisfied. Otherwise, the operation returns to S104.
S106, the control module 4 controls to send an instruction to the indoor unit: forcibly reducing the windshield of the inner fan of the sub indoor unit in the starting state to the lowest windshield; and controlling the electronic expansion valve of the sub-indoor unit in the closed state to be opened to a fixed opening degree, and keeping the corresponding inner fan closed.
S107, judging whether the air conditioning system meets defrosting entering conditions, controlling the air conditioning system to exit a heat storage mode and enter a defrosting mode when the air conditioning system meets the defrosting entering conditions, and controlling the indoor unit according to defrosting instructions; the defrosting entering conditions are as follows: whether the outdoor heat exchanger outlet temperature T1 is smaller than a third preset value or whether the duration T is larger than a second duration threshold;
the first time threshold is a preset longest defrosting time, and the second time threshold is larger than the first time threshold; the first preset value, the second preset value and the third preset value are sequentially reduced.
In a preferred embodiment of the present invention, the first preset value is 0 ℃, the first preset value is-9 ℃, and the third preset value is-12 ℃. When the outlet temperature T1 of the outdoor heat exchanger is lower than 0 ℃, timing is started, heat accumulation is started when the outlet temperature T1 of the outdoor heat exchanger is lower than-9 ℃, heat is accumulated for later defrosting, a defrosting program is executed when the outlet temperature T1 of the outdoor heat exchanger is lower than-12 ℃, the outlet temperature T1 of the outdoor heat exchanger is monitored in real time, and according to the counting time of the timing module 2 or the outlet temperature T1 of the outdoor heat exchanger, the outlet temperature T1 of the outdoor heat exchanger is controlled to be lower than a specified value and the defrosting program is executed for a specified duration, so that the overlength of frosting time can be avoided, the thickness of the frosting layer is caused, the defrosting time is prolonged, the defrosting efficiency is further improved, the defrosting time is shortened, and the defrosting difficulty is reduced.
In a preferred embodiment of the present invention, the method further comprises the step S108 of acquiring the outdoor environment temperature; presetting maximum defrosting time corresponding to different outdoor environment temperatures; and determining a first time threshold according to the mapping relation between the outdoor environment temperature and the longest defrosting time. The order of S108 may be adjusted as desired, preferably before step S101.
In a preferred embodiment of the present invention, the second time threshold=the first time threshold+300 s, that is, entering the defrosting program when the operation time of detecting the heat storage mode reaches 5min, can ensure the stored heat and control the thickness of the frost layer, so that the air conditioning system generates more heat and quickly performs defrosting.
As an example, the multi-split air conditioning system is heated and started to run at an ambient temperature of 2 ℃, the T value of the ambient temperature of 2 ℃ is that the longest defrosting time set by a main control program is 75min, when the T1 is less than 0 ℃, the defrosting time of the system is accumulated, the timing module 2 is started, and when any one of the following conditions is met: condition one: detecting the outlet temperature T1 of the outdoor heat exchanger in real time and executing the following judgment T1< -9? Condition II: the time period T counted by the timing module 2 is not less than T? The air conditioning system enters a heat storage mode, and the control module 4 sends the following instructions to the indoor unit: forcibly lowering the damper of the inner fan of the sub indoor unit 54 in the on state to the lowest damper; the electronic expansion valve of the sub-indoor unit 54 in the off state is controlled to be opened to a fixed opening degree, and the corresponding inner fan is kept closed. When any one of the following conditions is satisfied: condition one: detecting the outlet temperature T1 of the heat exchanger of the external machine in real time and executing the following judgment that T1< -12 ℃ is? Condition II: the time period T counted by the timing module 2 is equal to or greater than t+300s? The air conditioning system exits the heat storage mode and enters the normal defrosting mode. According to the embodiment of the invention, the indoor unit and the air conditioner piping are heated by the heat accumulation mode to accumulate heat, so that defrosting time can be effectively shortened.
The invention further provides a computer readable storage medium, which comprises a memory, wherein the memory stores a computer program, and the computer program executes the heat accumulation defrosting control method.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims (10)

1. A heat storage defrosting control device of an air conditioning system, characterized by comprising
The temperature acquisition module acquires the outlet temperature of the outdoor heat exchanger in real time;
the timing module counts the duration T that the outlet temperature of the outdoor heat exchanger is smaller than a first preset value;
the judging module is used for judging whether the air conditioning system operates a heating mode, judging whether the air conditioning system meets heat storage entering conditions or not and judging whether the air conditioning system meets defrosting entering conditions or not; wherein, the liquid crystal display device comprises a liquid crystal display device,
the heat storage entering conditions are as follows: the outlet temperature of the outdoor heat exchanger is smaller than a second preset value or the duration T is not smaller than a first duration threshold value; the defrosting entering conditions are as follows: whether the outlet temperature of the outdoor heat exchanger is smaller than a third preset value or whether the duration T is larger than a second duration threshold; the first time threshold is a preset longest defrosting time, and the second time threshold is larger than the first time threshold; the first preset value, the second preset value and the third preset value are sequentially reduced;
the control module is used for controlling the air conditioning system to enter a heat storage mode when the air conditioning system meets heat storage entering conditions; and when the air conditioning system meets defrosting entering conditions, controlling the air conditioning system to exit the heat storage mode and enter a defrosting mode.
2. The heat storage and defrosting control device of an air conditioning system according to claim 1, wherein the air conditioning system comprises a compressor, an oil separator, a four-way valve, an indoor unit, a throttling element, an outdoor heat exchanger and a gas-liquid separator which are sequentially connected to form a refrigerant circulation loop, the indoor unit comprises a plurality of sub-indoor units which are arranged in parallel, an inner fan and an electronic expansion valve are arranged in each sub-indoor unit, the temperature acquisition module is arranged at an outlet of the outdoor heat exchanger, and the temperature acquisition module is an outlet temperature sensing bag of the outdoor heat exchanger.
3. The heat and frost control apparatus of claim 2, wherein in the heat storage mode, the control module controls to issue an instruction to the indoor unit: forcibly reducing the windshield of the inner fan of the sub-room indoor unit in the starting state to the lowest windshield; and controlling the electronic expansion valve of the sub-chamber internal machine in a shutdown state to be opened to a fixed opening degree, and keeping the corresponding internal fan closed.
4. The heat storage defrosting control device of an air conditioning system according to claim 1, further comprising an outdoor ambient temperature acquisition module that acquires an outdoor ambient temperature; the preset module is used for presetting the longest defrosting time corresponding to different outdoor environment temperatures; the control module determines the first time threshold according to a mapping relation between the outdoor environment temperature and the longest defrosting time.
5. The heat accumulation defrosting control method of the air conditioning system is characterized by comprising the following steps of:
judging whether the air conditioning system operates a heating mode or not;
under the operation heating mode of the air conditioning system, acquiring the outlet temperature of the outdoor heat exchanger in real time;
judging whether the outlet temperature of the outdoor heat exchanger is smaller than a first preset value or not, and counting the duration T that the outlet temperature of the outdoor heat exchanger is smaller than the first preset value;
judging whether the air conditioning system meets a heat storage entering condition, and controlling the air conditioning system to enter a heat storage mode when the air conditioning system meets the heat storage entering condition; judging whether the air conditioning system meets defrosting entering conditions, controlling the air conditioning system to exit the heat storage mode when the air conditioning system meets the defrosting entering conditions, and entering a defrosting mode; wherein, the liquid crystal display device comprises a liquid crystal display device,
the heat storage entering conditions are as follows: the outlet temperature of the outdoor heat exchanger is smaller than a second preset value or the duration T is not smaller than a first duration threshold value;
the defrosting entering conditions are as follows: whether the outlet temperature of the outdoor heat exchanger is smaller than a third preset value or whether the duration T is larger than a second duration threshold; the first time threshold is a preset longest defrosting time, and the second time threshold is larger than the first time threshold; the first preset value, the second preset value and the third preset value are sequentially reduced.
6. The method according to claim 5, wherein the first preset value is 0 ℃, the first preset value is-9 ℃, and the third preset value is-12 ℃.
7. The method according to claim 5, wherein the air conditioning system comprises a compressor, an oil separator, a four-way valve, an indoor unit, a throttling element, an outdoor heat exchanger and a gas-liquid separator which are sequentially connected to form a refrigerant circulation loop, the indoor unit comprises a plurality of sub indoor units which are arranged in parallel, an inner fan and an electronic expansion valve are arranged in each sub indoor unit, the temperature acquisition module is arranged at an outlet of the outdoor heat exchanger, and the temperature acquisition module is an outlet temperature sensing bag of the outdoor heat exchanger.
8. The method according to claim 5, wherein in the heat storage mode, the control module controls to issue an instruction to the indoor unit: the control module controls to send an instruction to the indoor unit: forcibly reducing the windshield of the inner fan of the sub-room indoor unit in the starting state to the lowest windshield; and controlling the electronic expansion valve of the sub-chamber internal machine in a shutdown state to be opened to a fixed opening degree, and keeping the corresponding internal fan closed.
9. The method for controlling heat accumulation and defrosting of an air conditioning system according to claim 5, further comprising obtaining an outdoor ambient temperature;
presetting maximum defrosting time corresponding to different outdoor environment temperatures;
and determining the first time length threshold according to the mapping relation between the outdoor environment temperature and the maximum defrosting time.
10. A computer-readable storage medium, characterized in that a memory stores a computer program which, when executed, is a heat storage defrosting control method according to any one of claims 5 to 9.
CN202211634506.9A 2022-12-19 2022-12-19 Heat storage defrosting control device, control method and computer readable storage medium Pending CN116045454A (en)

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