CN111503722B - Air conditioning equipment - Google Patents

Air conditioning equipment Download PDF

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Publication number
CN111503722B
CN111503722B CN202010094907.4A CN202010094907A CN111503722B CN 111503722 B CN111503722 B CN 111503722B CN 202010094907 A CN202010094907 A CN 202010094907A CN 111503722 B CN111503722 B CN 111503722B
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China
Prior art keywords
heat storage
valve
heating
temperature
heat exchanger
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CN202010094907.4A
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Chinese (zh)
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CN111503722A (en
Inventor
颜鹏
都学敏
孙杨
李亚军
夏兴祥
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Qingdao Hisense Hitachi Air Conditioning System Co Ltd
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Qingdao Hisense Hitachi Air Conditioning System Co Ltd
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Priority to CN202010094907.4A priority Critical patent/CN111503722B/en
Publication of CN111503722A publication Critical patent/CN111503722A/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
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • 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
    • F24F11/42—Defrosting; Preventing freezing of outdoor units
    • 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
    • F24F11/62—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
    • F24F11/70—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
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2347/00—Details for preventing or removing deposits or corrosion
    • F25B2347/02—Details of defrosting cycles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Thermal Sciences (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses air conditioning equipment, which comprises an oil separator (2), a compressor (1), a gas-liquid separator (2), an air pipe stop valve (39), an indoor unit and an outdoor heat exchanger (6) which are communicated by a four-way reversing valve (3), wherein the oil separator (2), the compressor (1), the gas-liquid separator (2), the air pipe stop valve (39), the indoor unit and an outdoor heat exchanger (7) are communicated by the four-way reversing valve (4), and the oil separator (2), the compressor (1), the gas-liquid separator (2) and a heat storage heat exchanger (21) are communicated by the four-way reversing valve (5); when heating and heat storage are carried out, the requirement on the indoor unit heating is met preferentially, the heat storage adjusting electronic expansion valve takes the outlet superheat degree of the heat storage unit as a control target, the heating effect of the indoor unit is ensured, two modes of supplying heat to the heat storage medium by combining adjustable electric heating and supplying heat to the heat storage medium by condensing high-temperature high-pressure gaseous refrigerant are combined, and the problem of insufficient heat storage amount of the heat storage medium is solved.

Description

Air conditioning equipment
Technical Field
The invention relates to the technical field of commercial air conditioners, in particular to an air conditioning device.
Background
When the air conditioning system is in heating operation under the low-temperature and high-humidity condition, if the evaporation temperature of the heat exchanger is lower than the dew point temperature, the outdoor heat exchanger can be frosted, the heat exchange thermal resistance is increased, and the unit heating performance can be attenuated; defrosting is required to maintain the heating capacity of the unit by the air conditioning system.
At present, the defrosting mode mainly comprises: a natural defrosting method, a reverse defrosting method, and a hot gas bypass defrosting method; the natural defrosting method comprises the following steps that the operation of a compressor is stopped when defrosting is carried out, only a fan is operated, air continuously flows through an outdoor heat exchanger, and defrosting is carried out naturally on the surface of the heat exchanger when the temperature of the surface of the outdoor heat exchanger rises to 0 ℃; the reverse defrosting method switches the heating operation to the refrigerating operation through the switching of the four-way reversing valve, the heat generated by the operation of the compressor and the heat absorbed indoors are discharged to the outdoor heat exchanger to melt the frost layer on the surface of the outdoor heat exchanger, and the method does not need any additional equipment and only needs to control the four-way reversing valve to reverse; the hot gas bypass defrosting method is characterized in that heat of the compressor is directly introduced into the outdoor heat exchanger to defrost under the condition that the four-way reversing valve is not switched, the fluctuation of the air outlet temperature of the indoor unit is small in the defrosting process, the standing characteristic and the user comfort experience are good, the four-way reversing valve cannot be switched frequently, and the airflow noise is low.
The natural defrosting method requires that the outdoor environment temperature is more than 2-3 ℃ and even higher, and the outdoor heat exchanger has the risks of incomplete defrosting and accumulated frost layers; the reverse defrosting method has the following disadvantages: 1. the main heat for defrosting comes from the compressor, and the defrosting time is long; 2. during defrosting operation, heat cannot be supplied to the indoor unit, heat needs to be absorbed from the indoor unit, the indoor temperature is reduced, heating operation is restarted after defrosting, standing time is long, energy conservation is not facilitated, and comfort experience of users is reduced; 3. the four-way reversing valve is frequently switched, has high noise and is easy to damage; the hot gas bypass defrosting method also has the following disadvantages: 1. the heat required in the defrosting process mainly comes from the power consumption of the compressor, and the defrosting time is long; 2. the compressor has a risk of liquid return.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides air conditioning equipment, which stores part of heat through a heat storage medium in the heating operation process by using a phase-change material heat storage defrosting mode, and releases the pre-stored heat in the defrosting process, thereby achieving the technical effects of short defrosting time and energy saving; the method adopts two modes of the two outdoor heat exchangers for defrosting in a subarea mode and defrosting at the same time, and takes the relation between the power consumption peak value of the outdoor fan and the power consumption starting value of the outdoor fan as the judgment condition of the two defrosting modes so as to ensure that the indoor heating effect is prior and realize the heat balance between the indoor heating and the outdoor defrosting.
In order to achieve the purpose, the invention adopts the following technical scheme:
an air conditioning system is proposed, comprising an indoor unit (03) and/or an indoor unit (04); a heat storage unit (02) comprising a housing (18), a heat storage heat exchanger (21) and a heat storage medium (20); an outdoor unit (01) comprising: the oil separator (2), the compressor (1) and the gas-liquid separator (11) are connected in series in sequence; the four-way reversing valve (3) comprises a D3 end, an E3 end, a C3 end and an S3 end, wherein the D3 end is connected with an outlet of the oil separator (2), the S3 end is connected with an inlet of the gas-liquid separator (11), the E3 end is sequentially connected with an electromagnetic valve (13) and a gas pipe stop valve (39) in series and then connected with the input of an indoor unit (03) and/or (04), and the C3 end is connected with an outlet of the outdoor heat exchanger 6; the four-way reversing valve (4) comprises a D4 end, an E4 end, a C4 end and an S4 end, wherein the D4 end is connected with an outlet of the oil separator (2), the S4 end is connected with an inlet of the gas-liquid separator (11),the E4 end is connected with the input of the indoor unit (03) and/or (04) after being sequentially connected with the electromagnetic valve (14) and the air pipe stop valve (39) in series, and the C4 end is connected with the outlet of the outdoor heat exchanger 7; the outdoor unit (01) further comprises: the four-way reversing valve (5) comprises a D5 end, an E5 end, a C5 end and an S5 end, wherein the D5 end is connected with an outlet of the oil separator (2), the S5 end is connected with an inlet of the gas-liquid separator (11), the E5 end is connected with an inlet of the heat storage heat exchanger (21), and the C5 end is connected with the electromagnetic valve (16) and the capillary tube (17) in series and then connected with the S5 end; the inlet of the outdoor heat exchanger (6) is connected with the first end of the three-way valve (10) after being connected with the electronic expansion valve (8) in series, the inlet of the outdoor heat exchanger (7) is connected with the second end of the three-way valve (10) after being connected with the electronic expansion valve (9) in series, and the outlet of the heat storage heat exchanger (21) is connected with the third end of the three-way valve (10) after being connected with the heat storage regulation electronic expansion valve (23) in series; the third end of the three-way valve (10) is connected with a liquid pipe stop valve (38) in series and then is connected with the output of the indoor unit (03) and/or (04); a defrosting control module for controlling the defrosting operation when the evaporating temperature T is lower than the heating and heat storage operation periodeWith outdoor ambient temperature TaWhen the first relation is met, controlling the outdoor heat exchanger (6) and the outdoor heat exchanger (7) to defrost simultaneously; when evaporation temperature TeWith outdoor ambient temperature TaWhen the second relation is satisfied, if the power consumption peak value Wfan of the outdoor running fan_peakPower consumption Wfan of outdoor fan starting stage_startIf the fourth relation is met, the outdoor heat exchanger (6) and the outdoor heat exchanger (7) are controlled to defrost simultaneously, and if the outdoor running fan power consumption peak value Wfan is detected_peakPower consumption Wfan of outdoor fan starting stage_startThe fifth relation is met, and the outdoor heat exchanger (6) and the outdoor heat exchanger (7) are controlled to defrost in a partitioning mode; wherein the evaporation temperature Te and the outdoor ambient temperature TaThe first relationship of (1) is: t ise＜k3×Ta+b3And Ta1≤Ta≤Ta2And heating duration time t5min(ii) a Or, Te＜k2×Ta+b2And Ta2≤Ta≤Ta4And heating duration time t5min(ii) a Or Te＜k4×Ta+b4And Ta4≤TaAnd heating duration time t5min(ii) a Evaporation temperature Te and outdoor ambient temperature TaThe second relationship of (1) is: does not satisfy the first relation and does not satisfy the third relation, wherein the evaporation temperature TeWith outdoor ambient temperature TaThe third relationship of (2) is: t ise＞k1×Ta+b1And Ta1＜Ta＜Ta3And heating duration time t4min(ii) a Or, Te＞k4×Ta+b4And Ta3＜TaAnd heating duration time t4min(ii) a Peak value Wfan of outdoor running fan power consumption_peakPower consumption Wfan of outdoor fan starting stage_startThe fourth relationship of (2) is: wfan_peak/Wfan_start＞ζ1(ii) a Peak power consumption W of outdoor running fanfan_peakPower consumption Wfan of outdoor fan starting stage_startThe fifth relationship of (2) is: zeta2≤Wfan_peak/Wfan_start≤ζ1Or Wfan_peak/Wfan-start＜ζ2。
Compared with the prior art, the technical scheme of the invention has the following technical effects: according to the air conditioning equipment provided by the invention, the heat storage unit is additionally arranged outdoors, part of heat is stored by adopting the phase change material in the heat storage unit in the heating process of the air conditioning equipment, and the pre-stored heat is released in the defrosting process, so that the technical effects of short defrosting time and energy saving are achieved; the method adopts two modes of the two outdoor heat exchangers for defrosting in a subarea mode and defrosting at the same time, and takes the relation between the power consumption peak value of the outdoor fan and the power consumption starting value of the outdoor fan as the judgment condition of the two defrosting modes so as to ensure that the indoor heating effect is prior and realize the heat balance between the indoor heating and the outdoor defrosting.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a system architecture diagram of an air conditioning apparatus according to the present invention;
FIG. 2 is a block diagram of an embodiment of a thermal storage unit according to the present invention;
FIG. 3 is a cycle diagram of an embodiment of the cooling operation of the air conditioning apparatus according to the present invention;
FIG. 4 is a cycle chart of an embodiment of the heating operation of the air conditioning apparatus according to the present invention;
fig. 5 is a cycle diagram of an embodiment of heating and heat storage operation of the air conditioning apparatus according to the present invention;
FIG. 6 is a cycle chart of an embodiment of the heating and defrosting simultaneous operation of the air conditioning apparatus according to the present invention, FIG. 1;
FIG. 7 is a cycle of FIG. 2 showing an embodiment of simultaneous heating and defrosting operation of the air conditioning apparatus according to the present invention;
FIG. 8 is a cycle diagram of an embodiment of a simultaneous defrosting operation of an air conditioning apparatus according to the present invention;
FIG. 9 is a heat flow density variation curve of the phase change heat storage medium material;
fig. 10 is a flowchart illustrating a control process of the air conditioning apparatus to perform heating and heat storage according to the present invention;
FIG. 11 is a graph of evaporating temperature versus outdoor ambient temperature;
12-1, 12-2, 12-3, 12-4 are control flow charts of the defrosting mode selection of the air conditioning equipment provided by the invention;
FIGS. 13-1 and 13-2 are control flowcharts of the air conditioning apparatus according to the present invention for performing the zonal defrosting;
fig. 14 is a control flowchart of the air conditioner according to the present invention for performing simultaneous defrosting.
Reference numerals: 01-outdoor unit, 02-heat storage unit, 03-indoor unit, 04-indoor unit, 1-compressor, 2-oil separator, 3-four-way reversing valve, 4-four-way reversing valve, 5-four-way reversing valve, 6-outdoor heat exchanger, 6A-outdoor fan, 7-outdoor heat exchanger, 7A-outdoor fan, 8-electronic expansion valve, 9-electronic expansion valve, 10- "Y" type tee joint, 11-gas-liquid separator, 12-check valve, 13-solenoid valve, 14-solenoid valve, 15-capillary tube, 16-solenoid valve, 17-capillary tube, 18-stainless steel shell, 19-heat storage aluminum ingot, 20-heat storage medium, 21-heat storage heat exchanger, 22-adjustable electric heating, 23-heat-storage-regulating electronic expansion valve, 24-gas-dividing inlet temperature sensor, i.e. suction-gas temperature sensor, 25-low-pressure sensor, 26-oil-separator outlet temperature sensor, i.e. discharge-gas temperature sensor, 27-high-pressure sensor, 28-outdoor-environment temperature sensor, 29-outdoor-heat-exchanger 7 gas-pipe temperature sensor, 30-outdoor-heat-exchanger 7 liquid-pipe temperature sensor, 31-outdoor-heat-exchanger 6 gas-pipe temperature sensor, 32-outdoor-heat-exchanger 6 liquid-pipe temperature sensor, 33-heat-storage-exchanger inlet temperature sensor, 34-heat-storage-exchanger outlet temperature sensor, 35-first-heat-storage-unit internal temperature sensor, 36-second-heat-storage-unit internal temperature sensor 2, 37-third-heat-storage-unit internal temperature sensor, 38-liquid pipe stop valve, 39-air pipe stop valve, 40-electronic expansion valve, 41-indoor heat exchanger, 42-indoor fan, 43-liquid pipe temperature sensor, 44-air pipe temperature sensor, 45-electronic expansion valve, 46-indoor heat exchanger, 47-indoor fan, 48-liquid pipe temperature sensor and 49-air pipe temperature sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1 and 2, the air conditioning apparatus according to the present invention includes an outdoor unit 01, and a heat storage unit 02 (included in the outdoor unit 01); indoor unit 03, 04 (the present invention takes a multi-connected air conditioning system as an example, the indoor unit is greater than or equal to 2, and 2 indoor units are selected to illustrate the content of the present invention), wherein the outdoor unit 01 includes: the system comprises a compressor 1, an oil separator 2, a four-way reversing valve 3, a four-way reversing valve 4, a four-way reversing valve 5, an outdoor heat exchanger 6, an outdoor fan 6A, an outdoor heat exchanger 7, an outdoor fan 7A, an electronic expansion valve 8, an electronic expansion valve 9, a Y-shaped tee joint 10, a gas-liquid separator 11, a one-way valve 12, an electromagnetic valve 13, an electromagnetic valve 14, a capillary tube 15, an electromagnetic valve 16 and a capillary tube 17; the heat storage unit 02 comprises a stainless steel shell 18 (further the stainless steel shell is coated with a heat insulation material), a heat storage aluminum ingot 19, a phase change heat storage medium 20, a heat storage heat exchanger 21, an adjustable electric heater 22 and a heat storage adjusting electronic expansion valve 23; the indoor unit 03 includes an electronic expansion valve 40, an indoor heat exchanger 41, and an indoor fan 42; the indoor unit 04 comprises an electronic expansion valve 45, an indoor heat exchanger 46 and an indoor fan 47; the outdoor unit 01, the indoor units 03 and 04 are connected to each other by liquid pipe shut-off valves 38 and air pipe shut-off valves 39, respectively.
Specifically, the four-way reversing valve 3 comprises a D3 end, an E3 end, a C3 end and an S3 end, wherein the D3 end is connected with an outlet of the oil separator 2, the S3 end is connected with an inlet of the gas-liquid separator 11, the E3 end is sequentially connected with the electromagnetic valve 13 and the gas pipe stop valve 39 in series and then connected with the input of the indoor unit 03 and/or 04, and the C3 end is connected with an outlet of the outdoor heat exchanger 6.
The four-way reversing valve 4 comprises a D4 end, an E4 end, a C4 end and an S4 end, wherein the D4 end is connected with an outlet of the oil separator 2, the S4 end is connected with an inlet of the gas-liquid separator 11, the E4 end is sequentially connected with the electromagnetic valve 14 and the gas pipe stop valve 39 in series and then connected with the input of the indoor unit 03 and/or 04, and the C4 end is connected with an outlet of the outdoor heat exchanger 7.
The four-way reversing valve 5 comprises a D5 end, an E5 end, a C5 end and an S5 end, wherein the D5 end is connected with an outlet of the oil separator 2, the S5 end is connected with an outlet of the gas-liquid separator 11, the E5 end is connected with an outlet of the heat storage heat exchanger 21, and the C5 end is connected with the electromagnetic valve 16 and the capillary 17 in series and then connected with the S5 end; wherein, the inlet of the outdoor heat exchanger 6 is connected with the first end of the three-way valve 10 after being connected with the electronic expansion valve 8 in series, the inlet of the outdoor heat exchanger 7 is connected with the second end of the three-way valve 10 after being connected with the electronic expansion valve 9 in series, and the outlet of the heat storage heat exchanger 21 is connected with the third end of the three-way valve 10 after being connected with the heat storage regulating electronic expansion valve 23 in series; the third end of the three-way valve 10 is connected with the liquid pipe stop valve 38 in series and then is connected with the output of the indoor unit 03 and/or 04.
The outdoor unit four-way reversing valve 3 switches the heat exchange state of the outdoor heat exchanger 6 (a condenser during refrigeration or defrosting, an evaporator during heating); the four-way selector valve 4 switches the heat exchange state of the outdoor heat exchanger 7 (condenser during cooling or defrosting, evaporator during heating) and the four-way selector valve 5 switches the heat exchange state of the heat storage heat exchanger 21 (condenser during heat storage, evaporator during heat release).
In addition, the outdoor unit 01 further includes various sensors: a gas inlet temperature sensor 24, i.e., a suction temperature sensor, a low pressure sensor 25, an oil separator outlet temperature sensor 26, i.e., a discharge temperature sensor, a high pressure sensor 27, an outdoor environment temperature sensor 28, an outdoor heat exchanger 7 gas pipe temperature sensor 29, an outdoor heat exchanger 7 liquid pipe temperature sensor 30, an outdoor heat exchanger 6 gas pipe temperature sensor 31, and an outdoor heat exchanger 6 liquid pipe temperature sensor 32. The further outdoor heat exchanger 6 and the outdoor heat exchanger 7 are Fin-tube type heat exchangers or micro-channel type heat exchangers.
As shown in fig. 2, the heat storage unit 02 includes sensors including: a heat storage heat exchanger inlet temperature sensor 33, a heat storage heat exchanger outlet temperature sensor 34, a first heat storage unit internal temperature sensor 35, a second heat storage unit internal temperature sensor 36, a third heat storage unit internal temperature sensor 37 ( sensors 35, 36, 37 are in close contact with a heat storage aluminum ingot), and further the heat storage medium 20 filled in the heat storage unit 02 is an inorganic phase change heat storage medium such as na2so4.10h2o or an organic phase change heat storage medium such as paraffin.
Indoor unit 03 sensor: a liquid tube temperature sensor 43, an air tube temperature sensor 44; indoor unit 04 sensor: liquid pipe temperature sensor 48, trachea temperature sensor 49. Further indoor heat exchangers 41, 46 are of Fin-tube type or of microchannel type.
The operation of the air conditioning apparatus proposed by the present invention will be explained below.
1. Refrigeration mode of operation
The unit refrigeration system circulates as shown in fig. 3, the four-way reversing valve 4 and the four-way reversing valve 5 are closed, namely the D end and the C end of each four-way reversing valve are connected, and the E end and the S end are connected; the electromagnetic valve 13 is opened, and the electromagnetic valve 14 is opened; the electromagnetic valve 16 is opened when the compressor 1 is running and closed when the compressor 1 is stopped, the heat storage regulating electronic expansion valve 23 is closed, the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 1 passes through the oil separator 2 (which is used for separating the refrigerant from the frozen oil, the refrigerant flows into an outdoor unit, an indoor unit or a heat storage unit through a four-way reversing valve, the frozen oil returns to the gas-liquid separator 11 through the oil return capillary tube 15 and is mixed with the low-pressure refrigerant to return to the compressor 1), and the one-way valve 12 is divided into 2 parts: part 1 flows into an outdoor heat exchanger 6 through a four-way reversing valve 3 and is condensed into a high-temperature and high-pressure liquid refrigerant; the other part 1 flows into an outdoor heat exchanger 7 through a four-way reversing valve 4 and is condensed into a high-temperature and high-pressure liquid refrigerant; the high-temperature high-pressure liquid refrigerant flowing out of the outdoor heat exchanger 6 flows out through the electronic expansion valve 8, the high-temperature high-pressure liquid refrigerant flowing out of the outdoor heat exchanger 7 flows out of the electronic expansion valve 9, 2 parts of the high-temperature high-pressure liquid refrigerant are converged in the Y-shaped tee joint 10, the liquid refrigerant flowing out of the Y-shaped tee joint 10 is divided into 2 parts through the liquid pipe stop valve 38, and 1 part of the high-temperature high-pressure liquid refrigerant is throttled into low-temperature low-pressure liquid refrigerant through the electronic expansion valve 43 and evaporated into low-temperature low-pressure gaseous refrigerant in the heat exchanger 41; the other part 1 is throttled into low-temperature low-pressure liquid refrigerant by an electronic expansion valve 45 and evaporated into low-temperature low-pressure gaseous refrigerant by a heat exchanger 46; the low-temperature and low-pressure gaseous refrigerants flowing out of the indoor heat exchanger 41 and the indoor heat exchanger 46 are converged and flow to the outdoor unit through the air pipe stop valve 39; the low-temperature low-pressure gaseous refrigerant flowing out of the gas pipe stop valve 39 is divided into 2 parts, and the 1 part passes through the electromagnetic valve 13 and the four-way reversing valve 3; the other 1 part of the refrigerant flows through the electromagnetic valve 14 and the four-way reversing valve 4, the 2 parts of low-temperature and low-pressure gaseous refrigerant are converged into the gas-liquid separator 11, and the low-temperature and low-pressure gaseous refrigerant flowing out of the gas-liquid separator 11 flows into the suction end of the compressor 1, so that the refrigeration cycle is completed.
2. Heating only mode of operation
The unit heating system circulates as shown in fig. 4, a four-way reversing valve 3, a four-way reversing valve 4 and a four-way reversing valve 5 are opened, namely, the end D of the four-way reversing valve is connected with the end E, and the end C of the four-way reversing valve is connected with the end S; opening the electromagnetic valves 13 and 14; the electromagnetic valve 16 is opened when the compressor is running and closed when the compressor is stopped; the heat accumulation regulating electronic expansion valve 23 is closed, and the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 1 is divided into 2 parts after passing through the oil separator 2 and the check valve 12: part 1 flows out from the electromagnetic valve 13 through the four-way reversing valve 3, and the other part 1 flows out from the electromagnetic valve 14 through the four-way reversing valve 4; the high-temperature and high-pressure gaseous refrigerants flowing out of the electromagnetic valves 13 and 14 are converged and divided into 2 parts through the air pipe stop valve 39, and the 1 part is condensed into a high-temperature and high-pressure liquid refrigerant through the heat exchanger 46 and flows out of the electronic expansion valve 45; part 1 is condensed into high-temperature and high-pressure liquid refrigerant by the heat exchanger 41 and flows out of the electronic expansion valve 40, the refrigerant flowing out of the electronic expansion valve 45 and the electronic expansion valve 40 is converged, and is divided into 2 parts by the liquid pipe stop valve 38 and the Y-shaped tee joint 10, part 1 is throttled into low-temperature and low-pressure liquid refrigerant by the electronic expansion valve 8, is evaporated into low-temperature and low-pressure gaseous refrigerant in the outdoor heat exchanger 6, and flows out by the four-way reversing valve 3; part 1 is throttled into low-temperature low-pressure liquid refrigerant through the electronic expansion valve 9, is evaporated into low-temperature low-pressure gaseous refrigerant in the outdoor heat exchanger 7, flows out through the four-way reversing valve 4, the low-temperature low-pressure gaseous refrigerant flowing out of the four-way reversing valve 3 and the four-way reversing valve 4 converges and flows into the gas-liquid separator 11, and the low-temperature low-pressure gaseous refrigerant flowing out of the gas-liquid separator 11 flows into the air suction end of the compressor 1, so that the heating cycle is completed.
3. Heating and heat storage simultaneous operation mode
The unit heating and heat storage simultaneous operation system circulation is as shown in fig. 5, the four-way reversing valve 3, the four-way reversing valve 4 and the four-way reversing valve 5 are opened, namely, the D end and the E end of the four-way reversing valve are connected, and the C end and the S end of the four-way reversing valve are connected; opening the electromagnetic valves 13 and 14; the electromagnetic valve 16 is opened when the compressor is operated and closed when the compressor is stopped, and the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 1 is divided into 3 parts after passing through the oil separator 2 and the check valve 12: part 1 of the electromagnetic valve flows out from the electromagnetic valve 13 through the four-way reversing valve 3, and the other part 1 of the electromagnetic valve flows out from the electromagnetic valve 14 through the four-way reversing valve 4; the high-temperature and high-pressure gaseous refrigerants flowing out of the electromagnetic valves 13 and 14 are converged and divided into 2 parts through the air pipe stop valve 39, and the 1 part is condensed into a high-temperature and high-pressure liquid refrigerant through the heat exchanger 46 and flows out of the electronic expansion valve 45; part 1 is condensed into high-temperature and high-pressure liquid refrigerant by a heat exchanger 41 and flows out of an electronic expansion valve 40; the other part 1 flows into a heat storage heat exchanger 21 through a four-way reversing valve 5, and the high-temperature and high-pressure gaseous refrigerant is condensed into high-temperature and high-pressure liquid refrigerant by a heat storage medium 20 and flows out of a heat storage regulating electronic expansion valve 23; the refrigerant flowing out of the electronic expansion valve 45 and the electronic expansion valve 40 is merged and passes through the liquid pipe stop valve 38 to be merged with the refrigerant flowing out of the heat accumulation adjusting electronic expansion valve 23, the refrigerant is divided into 2 parts through the Y-shaped tee joint 10, the 1 part is throttled into low-temperature low-pressure liquid refrigerant through the electronic expansion valve 8, is evaporated into low-temperature low-pressure gaseous refrigerant in the outdoor heat exchanger 6, and flows out through the four-way reversing valve 3; part 1 is throttled into low-temperature low-pressure liquid refrigerant through an electronic expansion valve 9, is evaporated into low-temperature low-pressure gaseous refrigerant in an outdoor heat exchanger 7, flows out through a four-way reversing valve 4, the low-temperature low-pressure gaseous refrigerant flowing out of the four-way reversing valve 3 and the four-way reversing valve 4 is converged and flows into a gas-liquid separator 11, and the low-temperature low-pressure gaseous refrigerant flowing out of the gas-liquid separator 11 flows into a suction end of the compressor 1, so that the simultaneous operation cycle of heating and heat storage is completed.
4. Unit heating and defrosting simultaneous operation mode 1
As shown in fig. 6 and 7, the unit heating and defrosting simultaneous operation system cycle can adopt two defrosting modes based on the air conditioning equipment provided by the invention: the 1 st is that the outdoor heat exchanger rotates to defrost, the indoor machine continuously heats in the defrosting process; the 2 nd type is that the outdoor heat exchanger defrosts at the same time, only the defrosting indoor set does not heat; the outdoor heat exchanger consists of an outdoor heat exchanger 6 and an outdoor heat exchanger 7, and the 1 st defrosting mode needs to be completed by 2 steps:
step one
As shown in fig. 6, when the unit heats and the outdoor heat exchanger 6 performs defrosting operation, the four-way reversing valve 3 and the four-way reversing valve 5 are closed, that is, the end D of the four-way reversing valve is connected with the end C, and the end E of the four-way reversing valve is connected with the end S; when the four-way reversing valve 4 is opened, namely the D end of the four-way reversing valve is connected with the E end, and the C end of the four-way reversing valve is connected with the S end; the electromagnetic valve 13 is closed, the electromagnetic valve 14 is opened, and the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 1 passes through the oil separator 2 and the check valve 12 and is divided into 2 parts: part 1 flows into the outdoor heat exchanger 6 through the four-way reversing valve 3 to be condensed, the high-temperature and high-pressure gaseous refrigerant releases heat to frost the surface of the outdoor heat exchanger 6, and the refrigerant after heat release is changed into liquid from gaseous state and flows out through the electronic expansion valve 8; part 1 flows out from the electromagnetic valve 14 through the four-way reversing valve 4, the high-temperature and high-pressure gas refrigerant is divided into part 2 through the gas pipe stop valve 39, and part 1 is condensed into high-temperature and high-pressure liquid refrigerant through the heat exchanger 46 and flows out from the electronic expansion valve 45; part 1 is condensed into high-temperature and high-pressure liquid refrigerant by a heat exchanger 41, the liquid refrigerant flows out of an electronic expansion valve 40, the refrigerant flowing out of the electronic expansion valve 45 and the electronic expansion valve 40 is converged, and the refrigerant passes through a liquid pipe stop valve 38; the liquid refrigerant flowing out of the electronic expansion valve 8 is divided into 2 parts by a Y-shaped tee joint: part 1 is throttled into low-temperature and low-pressure liquid refrigerant through an electronic expansion valve 9, evaporated into low-temperature and low-pressure gaseous refrigerant in an outdoor heat exchanger 7 and flows out through a four-way reversing valve 4; the other part 1 is joined with the refrigerant flowing out of the liquid pipe stop valve 38, passes through the heat storage regulating electronic expansion valve 23 and then flows into the heat storage heat exchanger 21, the low-temperature liquid refrigerant absorbs the heat stored in the heat storage medium 20 and evaporates into a gaseous refrigerant, passes through the four-way reversing valve 5 and flows out, the low-pressure gaseous refrigerant flowing out of the four-way reversing valve 4 and the four-way reversing valve 5 is joined and flows into the gas-liquid separator 11, the low-temperature low-pressure gaseous refrigerant flowing out of the gas-liquid separator 11 flows into the suction end of the compressor 1, and thus the STEP1 cycle of the defrosting method 1 is completed.
Step two
As shown in fig. 7, when the unit heats and the outdoor heat exchanger 7 performs defrosting operation, the four-way reversing valve 4 and the four-way reversing valve 5 are closed, that is, the end D of the four-way reversing valve is connected with the end C, and the end E of the four-way reversing valve is connected with the end S; when the four-way reversing valve 3 is opened, namely the D end of the four-way reversing valve is connected with the E end, and the C end of the four-way reversing valve is connected with the S end; the electromagnetic valve 13 is opened, the electromagnetic valve 14 is closed, and the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 1 passes through the oil separator 2 and the check valve 12 and is divided into 2 parts: part 1 flows into the outdoor heat exchanger 7 through the four-way reversing valve 4 to be condensed, the high-temperature and high-pressure gaseous refrigerant releases heat to defrost the surface of the outdoor heat exchanger 7, and the refrigerant after heat release is changed into liquid from gaseous state and flows out through the electronic expansion valve 9; part 1 flows out from the electromagnetic valve 13 through the four-way reversing valve 3, the high-temperature and high-pressure gas refrigerant is divided into part 2 through the air pipe stop valve 39, and part 1 is condensed into high-temperature and high-pressure liquid refrigerant through the heat exchanger 46 and flows out from the electronic expansion valve 45; part 1 is condensed into high-temperature and high-pressure liquid refrigerant by a heat exchanger 41, the liquid refrigerant flows out of an electronic expansion valve 40, the refrigerant flowing out of the electronic expansion valve 45 and the electronic expansion valve 40 is converged, and the refrigerant passes through a liquid pipe stop valve 38; the liquid refrigerant flowing out of the electronic expansion valve 9 is divided into 2 parts by a Y-shaped tee joint: part 1 is throttled into low-temperature and low-pressure liquid refrigerant through an electronic expansion valve 8, evaporated into low-temperature and low-pressure gaseous refrigerant in an outdoor heat exchanger 6, and flows out through a four-way reversing valve 3; the other part 1 is merged with the refrigerant flowing out of the liquid pipe stop valve 38, flows into the heat storage heat exchanger 21 after passing through the heat storage regulating electronic expansion valve 23, the low-temperature liquid refrigerant absorbs the heat stored in the heat storage medium 20 and is evaporated into a gaseous refrigerant, flows out of the four-way reversing valve 5, the low-pressure gaseous refrigerant flowing out of the four-way reversing valve 3 and the four-way reversing valve 5 is merged and flows into the gas-liquid separator 11, and the low-temperature low-pressure gaseous refrigerant flowing out of the gas-liquid separator 11 flows into the air suction end of the compressor 1, so that the two-step cycle of the defrosting method 1 is completed.
Further, if the outdoor heat exchanger is of an up-down structure, the first step of the 1 st defrosting mode is to finish defrosting of the upper heat exchanger, and the second step is to finish defrosting of the lower heat exchanger; the outdoor heat exchanger is of a left-right structure, the detection values of the liquid pipe temperature sensors corresponding to the heat exchangers before defrosting are compared, the defrosting of the corresponding heat exchanger with a smaller detection value of the liquid pipe temperature sensor is completed in the first step, and the defrosting of the other heat exchanger is completed in the second step; if the detection values of the liquid pipe temperature sensors are the same, the first step is to finish the defrosting of the left heat exchanger, and the second step is to finish the defrosting of the right heat exchanger.
5. Unit defrosting operation mode 2
The unit defrosting operation system cycle is as shown in fig. 8, the four-way reversing valve 3, the four-way reversing valve 4 and the four-way reversing valve 5 are closed, namely the end D of the four-way reversing valve is connected with the end C, and the end E of the four-way reversing valve is connected with the end S; closing the electromagnetic valve 13 and closing the electromagnetic valve 14; the electromagnetic valve 16 is opened when the compressor is operated and closed when the compressor is stopped, and the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 1 is divided into 2 parts after passing through the oil separator 2 and the check valve 12: part 1 flows into the outdoor heat exchanger 6 through the four-way reversing valve 3 to be condensed, the high-temperature and high-pressure gaseous refrigerant releases heat to frost the surface of the outdoor heat exchanger 6, and the refrigerant after heat release is changed into liquid from gaseous state and flows out through the electronic expansion valve 8; the other part 1 flows into the outdoor heat exchanger 7 through the four-way reversing valve 4 to be condensed, the high-temperature and high-pressure gaseous refrigerant releases heat to frost the surface of the outdoor heat exchanger 7, and the refrigerant after heat release is changed into liquid from gaseous and flows out through the electronic expansion valve 9; liquid refrigerants flowing out of the electronic expansion valve 8 and the electronic expansion valve 9 are converged in the Y-shaped tee joint 10, flow into the heat storage heat exchanger 21 through the heat storage adjusting electronic expansion valve 23, absorb heat stored in the heat storage medium 20 by the low-temperature liquid refrigerant, are evaporated into gaseous refrigerants, flow out of the four-way reversing valve 5, flow into the gas-liquid separator 11 through the low-pressure gaseous refrigerant flowing out of the four-way reversing valve 5, flow into the air suction end of the compressor 1 through the low-temperature low-pressure gaseous refrigerant flowing out of the gas-liquid separator 11, and the unit defrosting operation cycle is completed. And in the further defrosting process, the indoor electronic expansion valve is closed, so that heat is prevented from being taken from the indoor unit in the defrosting process.
The following describes in detail a heating and heat storage control method of an air conditioning system according to the present invention.
The air conditioning equipment provided by the invention has the following control targets for heating and heat storage: the requirement of the indoor unit for heating is met, and meanwhile, the heat storage is ensured to be sufficient; in the heat storage and heating process, the heat storage adjusting electronic expansion valve (23) takes the outlet superheat degree of the heat storage unit (02), namely the heat storage superheat degree SH, as a control target, so that the heating effect of the indoor unit is ensured, meanwhile, an adjustable electric heating device (22) is additionally arranged in the heat storage device, heat is provided for the heat storage medium (20) by combining the adjustable electric heating device (22), and heat is provided for the heat storage medium (20) by condensing a high-temperature high-pressure gaseous refrigerant, so that the problem of insufficient heat storage capacity of the heat storage medium is solved.
Specifically, the air conditioning equipment provided by the invention comprises a heating and heat storage control module, and the heating and heat storage of the air conditioning equipment are controlled based on the target.
The control of the start of the heat storage of the unit comprises the following steps:
1) starting the unit heating operation;
2) judging whether the heating continuous operation time of the unit reaches the preset time t1minWhen the preset time is reached, the unit is transferred from the heating operation mode to the heating and heat storage mode; the unit continuously heats the running mode when the preset time is not reached;
3) the heating effect of the indoor unit is not influenced in consideration of the starting of the unit during heating, and the heating operation mode is transferred to the heating and heat storage operation mode, namely the duration time of the heating operation mode does not reach the preset time t1minWith the adjustable electric heating 22 closed and the thermal storage adjusting electronic expansion valve 23 closed to the minimum opening EVOPCM_min。
The invention relates to a method for transferring a unit from a heating operation mode to a heating and heat storage mode, in particular to a heat storage method of a heat storage medium (20), and the invention relates to 2 methods for storing heat of the heat storage medium: 1. supplying heat to the heat storage medium by adjustable electric heating 22; 2. no matter which method of the 2 methods is involved, the unit is shifted from the heating operation mode to the heating and heat storage operation mode, the correction of the initial opening degree of the heat storage regulating electronic expansion valve 23 is involved, and the calculation method is shown as the following formula:
EVOPCM_correct＝EVOPCMthe _startx alpha requires the unit to be transferred from the heating operation mode to the heating and heat storage operation mode, the heat storage regulating electronic expansion valve 23 assigns a preset opening EVOPCMAnd _ start (the preset opening is constant).
The correction factor α of the thermal storage regulating electronic expansion valve 23 relates to the following parameters:
1) capacity HP _ on (k) of the heating operation indoor unit;
2) heating operation indoor unit delta Th (k) namely indoor unit set temperature TsAnd the temperature T of return airiThe difference between: indoor unit Delta Th (k) preset control constant consti(i ═ 1, 2, 3, 4, 5, 6), the preset control constant 0 ≦ const1＜const2＜const3＜const4＜const5＜const6(ii) a Correction coefficient beta1(k)＝mi(i＝1、2、3、4、5、6)，m1＜m2＜m3＜m4＜m5＜m6≤1；
3) Set air volume of the heating operation indoor unit: correction factor beta related to set air quantity2(k)＝ni(i is 1, 2, 3, 4, 5), the correction coefficient β is set to be higher as the air volume is higher2(k) The larger, i.e. satisfies n1＜n2＜n3＜n4＜n5≤1；
Combining conditions 1), 2) and 3), the invention introduces a combined influencing factor HP _ inall relating to the indoor unit in heating operation, i.e.
HP_inall＝∑{HP_on(k)×β1(k)×β2(k)}；
4) Outdoor unit capacity HP _ out;
the conditions of 1), 2), 3) and 4) are integrated, the invention introduces an integrated correction coefficient beta related to the indoor unit and the outdoor unit, namely
Figure BDA0002384368590000131
The correction factor α of the heat storage regulating electronic expansion valve 23 is calculated as follows:
the comprehensive correction coefficient satisfies beta < M1，α＝α1(ii) a The comprehensive correction coefficient satisfies M1≤β＜M2，α＝α2(ii) a The comprehensive correction coefficient satisfies M2≤β＜M3，α＝α3(ii) a The comprehensive correction coefficient satisfies beta > M4，α＝α4；α：α1＜α2＜α3＜α4，α1≤1；Mi: presetting a control constant, M1＜M2＜M3；
EVOPCMA start: the preset opening degree of the thermal storage regulating electronic expansion valve 23; EVOPCM_correct: the corrected opening degree of the thermal storage regulating electronic expansion valve 23.
ΔTh(k)≤const1，β1(k)＝m1；ΔTh(k)＝const2，β1(k)＝m2；ΔTh(k)＝const3，β1(k)＝m3；ΔTh(k)＝const4，β1(k)＝m4；ΔTh(k)＝const5，β1(k)＝m5；ΔTh(k)≥const6，β1(k)＝m6。
Beta when the air quantity of the heating operation indoor unit is set to be a mute gear2(k)＝n1(ii) a Beta when the air quantity of the heating operation indoor unit is set to be a low wind gear2(k)＝n2(ii) a The air quantity of the heating operation indoor unit is set as the gear of the wind stroke, beta2(k)＝n3(ii) a The air quantity of the heating operation indoor machine is set to be a high-wind gear beta2(k)＝n4(ii) a The air quantity of the heating operation indoor machine is set to be ultrahigh gear beta2(k)＝n5。
The curve of the change of the heat flux density of the phase-change heat storage medium (20) along with the temperature is shown in fig. 9, and the heat storage curve of the phase-change material shows that the heat flux density of the phase-change material is smaller before the phase-change material does not reach the phase-change temperature point, and the process is sensible heat storage; when the phase-change material reaches the phase-change temperature point, the heat flow density of the phase-change material sharply rises, and heat is reached at a certain temperature point
The peak value of the flow density is Melting-peak point shown in the figure, and the process is latent heat storage; the heat flow density of the phase-change material is rapidly reduced along with the continuous rise of the temperature, the heat flow density is equivalent to the phase-change temperature before the phase-change temperature is reached, the process is also sensible heat storage, the heat storage capacity of the phase-change material is mainly latent heat storage, and the temperature of the phase-change material after the heat storage is selected to be T shown in the figurePCMThis temperature is generally higher than the phase transition temperature by a ℃ (the a value depends on the physical properties of the refrigerant and the phase change material).
The invention relates to 2 methods for storing heat for phase-change materials, which comprises the following steps: 1. providing heat to the phase change material by adjustable electrical heating 22; 2. the invention has detailed the transition of the unit from the heating to the heating and heat storage operation mode and the corrected opening EVO of the heat storage regulating electronic expansion valve 23 by condensing the high-temperature and high-pressure gaseous refrigerant to provide heat for the phase-change materialPCM_correctIn the heating and heat storage operation process of the further unit, the control target of the heat storage regulating electronic expansion valve 23 of the invention is the heat storage superheat SHo(SHoFor presetting a control constant, SHoMore than 0 deg.C), and the heat accumulation superheat SH is the temperature T detected by the temperature sensor 3434Pressure P detected by the high pressure sensor 27dCorresponding saturation temperature TcThe difference between, i.e. SH ═ T34-TcThe specific calculation method is shown as the following formula:
SH＝T34-Tc
ΔSH(n)＝SH-SHo
EVOPCM(n)＝EVOPCM(n-1)+ΔEVOPCM
ΔEVOPCM＝kp×{ΔSH(n)-ΔSH(n-1)}+ki×ΔSH(n)
EVOPCM(n): the opening degree of the heat storage regulating electronic expansion valve 23 in the nth step;
EVOPCM(n-1): the opening degree of the heat storage regulating electronic expansion valve 23 in the (n-1) th step;
ΔEVOPCM: the adjustment opening degree of the thermal storage adjustment electronic expansion valve 23;
kp、ki: PI control constant
The further unit heating and heat storage operation needs to consider 2 aspects: 1. the heating requirement of the running indoor unit is met; 2. the specific control method for satisfying the heat storage requirement of the heat storage module 02 and preferentially satisfying the requirement 1 is shown in fig. 10:
1) the unit is operated for heating and heat storage, and the exhaust pressure of the unit operation meets Pd≤PPCM(pressure P)PCMIs at a temperature TPCMPressure corresponding to saturation temperature) for t2min(during t2 time of battery pack heating heat accumulation, adjustable electric heater is turned off) the heat accumulation adjustment electronic expansion valve 23 is turned off to minimum EVOPCM_minThe adjustable electric heating is started, and the phase-change material uses heat generated by the adjustable electric heating to store heat;
2) the unit is operated for heating and heat storage, and the exhaust pressure of the unit operation meets PPCM＜Pd≤Pdo-PA1And P isd≤Pconst1Duration t2minControl target SH of the thermal storage regulating electronic expansion valve 23o＝SHo+SHconst1I.e. based on the initial control target SHoIncreasing the control constant SHconst1Reassigning to obtain a new control target SHo；
3) The unit is operated for heating and heat storage, and the exhaust pressure of the unit operation meets PPCM＜Pd≤Pdo-PA2And P isd≤Pconst2Duration t2minControl target SH of the thermal storage regulating electronic expansion valve 23o＝SHo+SHconstI.e. based on the initial control target SHoIncreasing the control constant SHconst2Reassigning to obtain a new control target SHo；
4) The unit is operated for heating and heat storage, and the exhaust pressure of the unit operation meets PPCM＜Pd≤Pdo-PA3And P isd≤Pconst3Duration t2minControl target SH of the thermal storage regulating electronic expansion valve 23o＝SHo+SHconst3I.e. based on the initial control target SHoIncreasing the control constant SHconst3Reassigning to obtain a new control target SHo；
5) The unit is operated for heating and heat storage, and the exhaust pressure of the unit operation meets PPCM＜Pd≤Pdo-PA4And P isd≤PconDuration t2minControl target SH of the thermal storage regulating electronic expansion valve 23o＝SHo+SHconstI.e. based on the initial control target SHoIncreasing the control constant SHconst4Reassigning to obtain a new control target SHo；
6) The unit is operated for heating and heat storage, and the exhaust pressure of the unit operation meets PPCM＜Pd≤Pdo-PA5And P isd≤Pconst5Duration t2minControl target SH of the thermal storage regulating electronic expansion valve 23o＝SHo+SHconst5I.e. based on the initial control target SHoIncreasing the control constantSHconst5Reassigning to obtain a new control target SHo；
7) The above conditions 2 to 6 are not satisfied, and the control target SH of the thermal storage regulating electronic expansion valve 23 is setoKeeping the same;
8) further under the condition 2-7, in the heating and heat storage operation process of the unit, the adjustable electric heating is turned off, and the refrigerant of the phase-change material releases heat and stores heat;
9) further, according to the condition 1, the unit operates in heating and heat storage, and the P is satisfied along with the operation of the unitd＞PPCMAnd lasts for t3minThe adjustable electric heating is closed, and the opening of the heat storage adjusting electronic expansion valve 23 is adjusted to be EVO based on the operation condition of the indoor unitPCM_correct(ii) a Further, based on the conditions 2 to 6, the control target of the thermal storage regulating electronic expansion valve 23 is confirmed, and the invention is not repeated here.
P in the inventionA1、PA2、PA3、PA4、PA5Is a preset control constant and PA1＞PA2＞PA3＞PA4＞PA5≥0；Pconst1、Pco、Pconst3、Pco、PconsIs a preset control constant and Pconst1＜Pconst2＜Pcons＜Pconst＜Pconst；SHconst、SHcon、SHconst、SHcon、SHconst5Is a preset control constant and SHconst1＞SHcon＞SHconst3＞SHconst＞SHconst≥0。
The following describes the defrosting process of the air conditioning equipment after a certain period of heating and heat storage in detail, and accordingly, the air conditioning equipment of the invention comprises a defrosting control module, and the defrosting control module judges whether defrosting is needed or not and selects a defrosting mode according to the following modes.
After the unit is heated and stored for a certain time, the unit is based on the evaporation temperature TeWith outdoor ambient temperature TaThe relation between the two judges whether the unit needs defrosting and the defrosting mode (NO.1 defrosting method or NO.2 defrosting method),in particular TeAnd TaThe relation between the units is shown in fig. 11, the further unit is shifted from the heating and heat storage operation to the defrosting operation, and the specific control flow involved in the invention is shown in fig. 12-1, 12-2, 12-3 and 12-4:
1) during heating and heat storage operation, when the evaporation temperature TeWith outdoor ambient temperature TaWhen the first relation is met, controlling the outdoor heat exchanger (6) and the outdoor heat exchanger (7) to defrost simultaneously; when evaporation temperature TeWith outdoor ambient temperature TaWhen the second relation is satisfied, if the power consumption peak value Wfan of the outdoor running fan_peakPower consumption Wfan of outdoor fan starting stage_startIf the fourth relation is met, the outdoor heat exchanger (6) and the outdoor heat exchanger (7) are controlled to defrost simultaneously, and if the outdoor running fan power consumption peak value Wfan is detected_peakPower consumption Wfan of outdoor fan starting stage_startAnd the fifth relation is met, and the outdoor heat exchanger (6) and the outdoor heat exchanger (7) are controlled to defrost in a subarea mode.
Wherein the evaporation temperature Te and the outdoor ambient temperature TaThe first relationship of (1) is: t ise＜k3×Ta+b3And Ta1≤Ta≤Ta2And heating duration time t5min(ii) a Or, Te＜k2×Ta+b2And Ta2≤Ta≤Ta4And heating duration time t5min(ii) a Or Te＜k4×Ta+b4And Ta4≤TaAnd heating duration time t5min(ii) a Evaporation temperature TeWith outdoor ambient temperature TaThe second relationship of (1) is: does not satisfy the first relation and does not satisfy the third relation, wherein the evaporation temperature TeWith outdoor ambient temperature TaThe third relationship of (2) is: t ise＞k1×Ta+b1And Ta1＜Ta＜Ta3And heating duration time t4min(ii) a Or, Te＞k4×Ta+b4And Ta3＜TaAnd heating duration time t4min(ii) a Peak value Wfan of outdoor running fan power consumption_peakPower consumption Wfan of outdoor fan starting stage_startThe fourth relationship of (2) is: wfan_peak/Wfan_start＞ζ1(ii) a Peak value Wfam of outdoor running fan power consumption_peakPower consumption Wfan of outdoor fan starting stage_startThe fifth relationship of (2) is: zeta2≤Wfan-peak/Wfan_start≤ζ1Or Wfan-peak/Wfan-start＜ζ2。
ζ1、ζ2Is a preset control constant, and ζ2＞1；Wfan_peak: the maximum power consumption of the outdoor fan is realized during the process from the heating start of the unit to the defrosting preparation heat storage operation of the unit or the defrosting preparation heat preservation process of the unit; wfan_start: the initial value of the power consumption of the outdoor fan at the starting stage of the unit;
Figure BDA0002384368590000171
Wfan1、Wfan2、Wfan3、Wfann: the unit heats and starts the outdoor fans NO.1, NO.2, NO.3 and the power consumption of the outdoor fans at NO. n time, wherein n is more than or equal to 6 under general conditions.
2) During heating and heat storage operation, when the evaporating temperature Te and the outdoor ambient temperature TaWhen the third relation is satisfied, the heat storage regulating electronic expansion valve (23) is regulated to EVO when the adjustable electric heating (22) is not openedPCM_minThen, the running state of the unit is transferred to heating and heat preservation; when the adjustable electric heating (22) is started, the running state of the unit is transferred to heating and heat preservation after the adjustable electric heating (22) is closed.
3) When the evaporation temperature Te is equal to the outdoor ambient temperature TaWhen satisfying first relation, defrosting control module control outdoor heat exchanger (6) and outdoor heat exchanger (7) defrost simultaneously, specifically include:
when the adjustable electric heating (22) is not started, if the internal temperature of the heat storage unit is more than TPCMThen the thermal storage electronic expansion valve (23) is adjusted to EVOPCM_minThen the running state of the unit is transferred to a defrosting preparation heat preservation state, and the unit runs t in the defrosting preparation heat preservation state6minAfter the time, the outdoor heat exchanger (6) is controlled andthe outdoor heat exchanger (7) is defrosted simultaneously; if the internal temperature of the heat storage unit is not satisfied, the internal temperature is more than TPCMThen the thermal storage electronic expansion valve (23) is adjusted to EVOPCM_minAnd after the adjustable electric heating (22) is started, the running state of the unit is transferred to a defrosting heat storage preparation state, and the unit runs t in the defrosting heat storage preparation state6minAfter the time, controlling the outdoor heat exchanger (6) and the outdoor heat exchanger (7) to defrost simultaneously;
when the adjustable electric heating (22) is started, if the internal temperature of the heat storage unit is min (T)35、T36、T37)＞TPCMThen the running state of the unit is transferred to the defrosting preparation heat preservation state after the adjustable electric heating (22) is closed, and the unit runs t in the defrosting preparation heat preservation state6minAfter the time, controlling the outdoor heat exchanger (6) and the outdoor heat exchanger (7) to defrost simultaneously; if not satisfying min (T)35、T36、T37)＞TPCMThen the operation state of the unit is transferred to the defrosting preparation heat storage state after the adjustable electric heating (22) is started, and the unit is operated t in the defrosting preparation heat storage state6minAfter the time, controlling the outdoor heat exchanger (6) and the outdoor heat exchanger (7) to defrost simultaneously; wherein, TPCM-a temperature at which heat storage of the heat storage medium (20) is completed.
4) At evaporating temperature Te and outdoor ambient temperature TaSatisfying the second relationship and controlling the outdoor heat exchanger (6) and the outdoor heat exchanger (7) to defrost simultaneously, if the adjustable electric heating (22) is turned on, the temperature inside the heat storage unit is greater than TPCMWhen the temperature is higher than the preset temperature, the adjustable electric heating (22) is turned off, the running state of the unit is transferred to defrosting preparation for heat preservation, and the temperature in the heat storage unit is min (T)35、T36、T37) Less than TPCMWhen the heat storage is needed, the adjustable electric heating (22) is kept on, and the running state of the unit is transferred to defrosting to prepare for heat storage; if the adjustable electric heating (22) is not switched on, the temperature min (T) inside the heat storage unit35、T36、T37) Greater than TPCMWhile regulating the heat storage electronic expansion valve (23) to EVOPCM_minAnd the running state of the unit is transferred to defrosting preparation heat preservation, and the temperature min (T) in the heat storage unit35、T36、T37) Less than TPCMWhen the temperature is high, the adjustable electric heater (22) is turned on to expand the heat-accumulated electronsValve (23) regulated to EVOPCM_minAnd transferring the running state of the unit to defrosting to prepare for heat storage.
5) Operating the fan outdoors at peak Wfa_peakPower consumption Wfan of outdoor fan starting stage_startWhen the fourth relation is met, the unit defrosting is firstly prepared for heat preservation or the unit defrosting is prepared for heat storage operation to meet t6minAfter the time, the adjustable electric heating (22) is turned off and the outdoor heat exchanger (6) and the outdoor heat exchanger (7) are controlled to defrost simultaneously.
6) Running the peak value Wfan of the power consumption outdoors_peakPower consumption Wfan of outdoor fan starting stage_startWhen the fifth relation is met, the unit defrosting is firstly prepared for heat preservation or the unit defrosting is prepared for heat storage operation to meet t6minAnd after the time, the adjustable electric heating (22) is turned off, and the outdoor heat exchanger (6) and the outdoor heat exchanger (7) are controlled to defrost in a subarea mode.
As can be seen from the above, the present invention relates to 2 defrosting modes, the NO.1 method, i.e., the outdoor heat exchanger (6) and the outdoor heat exchanger (7) are defrosted in different zones, and the NO.2 method, i.e., the outdoor heat exchangers (6) and (7) are defrosted simultaneously.
As can be seen from the foregoing, the outdoor heat exchanger (6) and the outdoor heat exchanger (7) achieve zonal defrosting according to the following two steps: the defrosting method comprises the following steps of firstly, controlling a four-way reversing valve (3) and a four-way reversing valve (5) to be closed, controlling a four-way reversing valve (4) to be opened, controlling an electromagnetic valve (13) to be closed and controlling an electromagnetic valve (14) to be opened so as to defrost an outdoor heat exchanger (6); and step two, the four-way reversing valve (4) and the four-way reversing valve (5) are controlled to be closed, the four-way reversing valve (3) is controlled to be opened, the electromagnetic valve (14) is controlled to be closed, and the electromagnetic valve (13) is controlled to be opened, so that the outdoor heat exchanger (7) is defrosted. Correspondingly, the air conditioning equipment is provided with a subarea defrosting control module which is responsible for carrying out specific control of subarea defrosting on the air conditioning equipment:
as shown in fig. 13-1 and 13-2:
1) meets the temperature T of a liquid pipe of the outdoor heat exchanger (6)e3Greater than defrosting temperature TdefrostAnd lasts for t7minDuring time, the defrosting of the outdoor heat exchanger (6) is switched to the defrosting of the outdoor heat exchanger (7); a partition defrosting control module for controlling the temperature T of a liquid pipe of the outdoor heat exchanger (7)e3Greater than defrosting temperature TdefrostAnd lasts for t7minAnd when the time is up, defrosting is finished.
In order to solve the existing problem of insufficient defrosting heat caused by insufficient heat storage of the heat storage unit (02), the invention is based on the adjustable electric heating (22), and the adjustable electric heating (22) is controlled by the adjustable electric heating (22) control module to be started at the right time to supplement the heat storage energy.
Specifically, 2) the defrosting time of the outdoor heat exchanger (6) is more than t8minOr the defrosting time of the outdoor heat exchanger (7) is more than t8minAnd controlling the adjustable electric heater (22) to start.
3) When the adjustable electric heater (22) is turned on, the temperature T of the liquid pipe of the outdoor heat exchanger (6) is mete32Greater than defrosting temperature TdefrostAnd lasts for t7minDuring time, the defrosting of the outdoor heat exchanger (6) is switched to the defrosting of the outdoor heat exchanger (7), and the temperature T of a liquid pipe of the outdoor heat exchanger (7) is measurede3Greater than defrosting temperature TdefrostAnd lasts for t7minAnd when the time is up, defrosting is finished.
4) When the adjustable electric heater (22) is started, if the temperature T of the liquid pipe of the outdoor heat exchanger (6) is not mete32Greater than defrosting temperature TdefrostAnd lasts for t7minTime, then at defrosting time is greater than or equal to t9minDuring the defrosting process, the defrosting of the outdoor heat exchanger (6) is switched to the defrosting of the outdoor heat exchanger (7), and the temperature T of a liquid pipe of the outdoor heat exchanger (7) is measurede30Greater than defrosting temperature TdefrostAnd lasts for t7minAnd when the time is up, defrosting is finished.
5) After the defrosting of the outdoor heat exchanger (6) is switched to the defrosting of the outdoor heat exchanger (7), if the temperature T of a liquid pipe of the outdoor heat exchanger (7) is not mete30Greater than defrosting temperature TdefrostAnd lasts for t7minTime, when the defrosting time is more than or equal to t10minAnd then, the defrosting is finished.
6) When the adjustable electric heating (22) is started, the liquid pipe temperature T of the outdoor heat exchanger (7) is mete30Greater than defrosting temperature TdefrostAnd lasts for t7minWhen the time is long, defrosting is finished; if not, the defrosting time is more than or equal to t when meeting9minAnd then, the defrosting is finished.
Unit No.2 method, i.e., defrosting of both outdoor heat exchangers (6) and (7), controls as shown in fig. 14:
set begins defrosting, and min (T) is judgede30、Te32)＞TdefrostDuration t7minIf the condition is met, the unit defrosting is finished; if the condition is not met, the defrosting time is further judged to be more than or equal to t11minIf the defrosting time does not meet the condition, the unit defrosting is continued; defrosting time meets the condition, electric heating can be adjusted to be started, and min (T) is further judgede30、Te32)＞TdefrostDuration t7minIf the condition is met, the unit defrosting is finished; if the condition is not met, the defrosting time is further judged to be more than or equal to t12minIf the defrosting time does not meet the condition, the unit NO.2 method continues defrosting; and the defrosting time meets the condition, and the forced defrosting of the unit is finished.
Time t7、t8、t9、t10、t11、t12To preset the control constant, the preset control constant satisfies t7＜1min、3min＜t8＜t9＜t10＜t11＜t12。
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (5)

1. An air conditioning apparatus comprising:
a first indoor unit (03) and/or a second indoor unit (04);
a heat storage unit (02) comprising a housing (18), a heat storage heat exchanger (21) and a heat storage medium (20);
an outdoor unit (01) comprising:
the oil separator (2), the compressor (1) and the gas-liquid separator (11) are connected in series in sequence;
the first four-way reversing valve (3) comprises a D3 end, an E3 end, a C3 end and an S3 end, the D3 end is connected with an outlet of the oil separator (2), the S3 end is connected with an inlet of the gas-liquid separator (11), the E3 end is sequentially connected with a first electromagnetic valve (13) and a gas pipe stop valve (39) in series and then connected with the input of the first indoor unit (03) and/or the second indoor unit (04), and the C3 end is connected with an outlet of the first outdoor heat exchanger (6);
the second four-way reversing valve (4) comprises a D4 end, an E4 end, a C4 end and an S4 end, the D4 end is connected with the outlet of the oil separator (2), the S4 end is connected with the inlet of the gas-liquid separator (11), the E4 end is sequentially connected with the check valve (14) and the gas pipe stop valve (39) in series and then connected with the input of the first indoor unit (03) and/or the second indoor unit (04), and the C4 end is connected with the outlet of the second outdoor heat exchanger (7);
characterized in that the outdoor unit (01) further comprises:
the third four-way reversing valve (5) comprises a D5 end, an E5 end, a C5 end and an S5 end, wherein the D5 end is connected with an outlet of the oil separator (2), the S5 end is connected with an inlet of the gas-liquid separator (11), the E5 end is connected with an inlet of the heat storage heat exchanger (21), and the C5 end is connected with the S5 end after being connected with the second electromagnetic valve (16) and the capillary tube (17) in series; the inlet of the first outdoor heat exchanger (6) is connected with a first electronic expansion valve (8) in series and then is connected with a first end of a three-way valve (10), the inlet of the second outdoor heat exchanger (7) is connected with a second electronic expansion valve (9) in series and then is connected with a second end of the three-way valve (10), and the outlet of the heat storage heat exchanger (21) is connected with a heat storage regulation electronic expansion valve (23) in series and then is connected with a third end of the three-way valve (10); the third end of the three-way valve (10) is connected with a liquid pipe stop valve (38) in series and then is connected with the output of the first indoor unit (03) and/or the second indoor unit (04);
a heat storage heat exchanger outlet temperature sensor (34) mounted at the outlet of the heat storage heat exchanger (21);
a high-pressure sensor (27) attached to the outlet of the oil separator (2);
a heating and heat storage control module for heating and heat storage period
Figure DEST_PATH_IMAGE002
The opening degree of the heat storage adjusting electronic expansion valve (23) is adjusted to enable the heat storage superheat degree to reach the target superheat degree
Figure DEST_PATH_IMAGE004
(ii) a Wherein the content of the first and second substances,
Figure DEST_PATH_IMAGE006
SH is the temperature detected by the heat storage heat exchanger outlet temperature sensor (34)
Figure DEST_PATH_IMAGE008
Pressure detected by the high pressure sensor (27)
Figure DEST_PATH_IMAGE010
Corresponding saturation temperature
Figure DEST_PATH_IMAGE012
A difference of (d);
Figure DEST_PATH_IMAGE014
and
Figure DEST_PATH_IMAGE016
is a constant;
the partition defrosting control module is used for controlling the first four-way reversing valve (3) and the third four-way reversing valve (5) to be closed, the second four-way reversing valve (4) to be opened, the first electromagnetic valve (13) to be closed and the third electromagnetic valve (14) to be opened after the heating and heat storage operation is set for time so as to defrost the first outdoor heat exchanger (6); the second four-way reversing valve (4) and the third four-way reversing valve (5) are controlled to be closed, the first four-way reversing valve (3) is controlled to be opened, the third electromagnetic valve (14) is controlled to be closed, and the first electromagnetic valve (13) is controlled to be opened, so that the second outdoor heat exchanger (7) is defrosted;
the heating and heat storage control module is further configured to:
in heatingBefore the heat accumulation is started, the adjustable electric heating (22) is closed, and the heat accumulation adjusting electronic expansion valve (23) is closed to the minimum opening degree
Figure DEST_PATH_IMAGE018
；
At the start of heating and heat storage, based on
Figure DEST_PATH_IMAGE020
Correcting the initial opening degree of the heat storage regulating electronic expansion valve (23); wherein the content of the first and second substances,
Figure DEST_PATH_IMAGE022
in order to set the opening degree in advance,
Figure DEST_PATH_IMAGE024
is a correction factor;
the correction coefficient
Figure DEST_PATH_IMAGE026
The method is obtained based on the following steps:
in the case of the integrated correction factor satisfying
Figure DEST_PATH_IMAGE028
When the temperature of the water is higher than the set temperature,
Figure DEST_PATH_IMAGE030
；
in the case of the integrated correction factor satisfying
Figure DEST_PATH_IMAGE032
When the temperature of the water is higher than the set temperature,
Figure DEST_PATH_IMAGE034
；
in the case of the integrated correction factor satisfying
Figure DEST_PATH_IMAGE036
When the temperature of the water is higher than the set temperature,
Figure DEST_PATH_IMAGE038
；
in the case of the integrated correction factor satisfying
Figure DEST_PATH_IMAGE040
When the temperature of the water is higher than the set temperature,
Figure DEST_PATH_IMAGE042
；
Figure DEST_PATH_IMAGE044
＜
Figure DEST_PATH_IMAGE046
＜
Figure DEST_PATH_IMAGE048
＜
Figure DEST_PATH_IMAGE050
，
Figure DEST_PATH_IMAGE052
，
Figure DEST_PATH_IMAGE054
＜
Figure DEST_PATH_IMAGE056
＜
Figure DEST_PATH_IMAGE058
；
wherein the content of the first and second substances,
Figure DEST_PATH_IMAGE060
,
Figure DEST_PATH_IMAGE062
is the capacity of the outdoor unit,
Figure DEST_PATH_IMAGE064
，
Figure DEST_PATH_IMAGE066
the capacity of the indoor unit during heating operation, k is the number of the indoor unit,
Figure DEST_PATH_IMAGE068
(i=1、2、3、4、5、6)，
Figure DEST_PATH_IMAGE070
＜
Figure DEST_PATH_IMAGE072
setting a correction coefficient of a difference value between the temperature and the return air temperature for the heating operation indoor unit;
Figure DEST_PATH_IMAGE074
(i=1, 2, 3, 4, 5) correction coefficient for air volume set for the indoor unit;
Figure DEST_PATH_IMAGE076
，
Figure DEST_PATH_IMAGE078
；
Figure DEST_PATH_IMAGE080
，
Figure DEST_PATH_IMAGE082
；
Figure DEST_PATH_IMAGE084
，
Figure DEST_PATH_IMAGE086
；
Figure DEST_PATH_IMAGE088
，
Figure DEST_PATH_IMAGE090
；
Figure DEST_PATH_IMAGE092
，
Figure DEST_PATH_IMAGE094
；
Figure DEST_PATH_IMAGE096
，
Figure DEST_PATH_IMAGE098
；
Figure DEST_PATH_IMAGE100
setting temperature for indoor unit
Figure DEST_PATH_IMAGE102
And temperature of return air
Figure DEST_PATH_IMAGE104
The difference between the values of the two signals,
Figure DEST_PATH_IMAGE106
＜
Figure DEST_PATH_IMAGE108
＜
Figure DEST_PATH_IMAGE110
＜
Figure DEST_PATH_IMAGE112
＜
Figure DEST_PATH_IMAGE114
＜
Figure DEST_PATH_IMAGE116
(ii) a The air quantity of the heating operation indoor unit is set to be a mute gear,
Figure DEST_PATH_IMAGE118
(ii) a The air quantity of the heating operation indoor unit is set to be a low-air gear,
Figure DEST_PATH_IMAGE120
(ii) a The air quantity of the heating operation indoor unit is set as a stroke gear,
Figure DEST_PATH_IMAGE122
(ii) a The air quantity of the heating operation indoor unit is set to be a high-air gear,
Figure DEST_PATH_IMAGE124
(ii) a The air quantity of the heating operation indoor unit is set to be an ultrahigh gear,
Figure DEST_PATH_IMAGE126
。
2. the air conditioner according to claim 1, further comprising:
an adjustable electric heater (22) for supplementing heat energy to the heat storage medium (20) when in starting;
the heating and heat storage control module is specifically used for:
after the heating and heat storage are started, the exhaust pressure is satisfied
Figure 950158DEST_PATH_IMAGE010
Is less than or equal to
Figure DEST_PATH_IMAGE128
And continues to be
Figure DEST_PATH_IMAGE130
In the condition of (1), the heat storage regulation electronic expansion valve (23) is regulated to
Figure DEST_PATH_IMAGE132
And turning on the adjustable electric heating (22).
3. The air conditioning apparatus of claim 2, wherein the heating and thermal storage control module is further configured to:
after the adjustable electric heating (22) is turned on, the condition is satisfied
Figure DEST_PATH_IMAGE134
And continues to be
Figure DEST_PATH_IMAGE136
In the condition of (1), the heat storage regulation electronic expansion valve (23) is regulated to
Figure DEST_PATH_IMAGE138
And turning off the adjustable electric heating (22).
4. The air conditioning apparatus of claim 1, wherein the heating and thermal storage control module is further configured to:
after the heating and heat storage are started, the exhaust pressure is not satisfied
Figure 452684DEST_PATH_IMAGE010
Is less than or equal to
Figure 256692DEST_PATH_IMAGE128
And continues to be
Figure 720034DEST_PATH_IMAGE130
In the case of the condition(s) of (c),
if it satisfies
Figure DEST_PATH_IMAGE140
And is
Figure DEST_PATH_IMAGE142
Persistence
Figure 9237DEST_PATH_IMAGE130
Then use
Figure DEST_PATH_IMAGE144
Updating the target superheat degree
Figure DEST_PATH_IMAGE146
；
If it satisfies
Figure DEST_PATH_IMAGE148
And is
Figure DEST_PATH_IMAGE150
Persistence
Figure 648159DEST_PATH_IMAGE130
Then use
Figure DEST_PATH_IMAGE152
Updating the target superheat degree
Figure 137915DEST_PATH_IMAGE146
；
If it satisfies
Figure DEST_PATH_IMAGE154
And is
Figure DEST_PATH_IMAGE156
Persistence
Figure 26237DEST_PATH_IMAGE130
Then use
Figure DEST_PATH_IMAGE158
Updating the target superheat degree
Figure 361272DEST_PATH_IMAGE146
；
If it satisfies
Figure DEST_PATH_IMAGE160
And is
Figure DEST_PATH_IMAGE162
Persistence
Figure 651439DEST_PATH_IMAGE130
Then use
Figure DEST_PATH_IMAGE164
Updating the target superheat degree
Figure 797250DEST_PATH_IMAGE146
；
If it satisfies
Figure DEST_PATH_IMAGE166
And is
Figure DEST_PATH_IMAGE168
Persistence
Figure 422135DEST_PATH_IMAGE130
Then use
Figure DEST_PATH_IMAGE170
Updating the target superheat degree
Figure DEST_PATH_IMAGE172
。
5. The air conditioning apparatus of claim 3, wherein the heating and thermal storage control module is further configured to:
after adjusting the heat storage adjusting electronic expansion valve (23)
Figure DEST_PATH_IMAGE174
And turning off the adjustable electric heating (22) Then based on
Figure DEST_PATH_IMAGE176
The opening degree of the heat storage adjusting electronic expansion valve (23) is adjusted to enable the heat storage superheat degree to reach the target superheat degree
Figure DEST_PATH_IMAGE178
。
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CN110715485A (en) * 2019-10-25 2020-01-21 广东美的制冷设备有限公司 Air conditioner, control method and device thereof, and computer-readable storage medium
CN111457466A (en) * 2020-02-14 2020-07-28 青岛海信日立空调系统有限公司 Air conditioning equipment

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