CN114608071A - Control device and method of air conditioning system and air conditioning system - Google Patents
Control device and method of air conditioning system and air conditioning system Download PDFInfo
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- CN114608071A CN114608071A CN202210247668.0A CN202210247668A CN114608071A CN 114608071 A CN114608071 A CN 114608071A CN 202210247668 A CN202210247668 A CN 202210247668A CN 114608071 A CN114608071 A CN 114608071A
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- 239000003507 refrigerant Substances 0.000 claims abstract description 197
- 238000001816 cooling Methods 0.000 claims abstract description 81
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- 230000001276 controlling effect Effects 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 239000000126 substance Substances 0.000 claims description 5
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- 239000012530 fluid Substances 0.000 description 7
- 238000005507 spraying Methods 0.000 description 6
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- 238000012544 monitoring process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
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- 238000005979 thermal decomposition reaction Methods 0.000 description 1
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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
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
- F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
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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
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/08—Compressors specially adapted for separate outdoor units
- F24F1/10—Arrangement or mounting thereof
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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
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
- F24F1/16—Arrangement or mounting thereof
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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
- F24F11/62—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
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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
- F24F11/62—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
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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
- F24F11/70—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
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- 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
- F25B2500/00—Problems to be solved
- F25B2500/08—Exceeding a certain temperature value in a refrigeration component or cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
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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)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control device and a method of an air conditioning system and the air conditioning system, wherein the device comprises: the control unit is configured to control the temperature adjusting system to work in a refrigerant storage mode under the condition that the heat exchange system performs refrigeration or heating operation; a temperature detection unit configured to acquire a discharge temperature of the compressor (100); a control unit further configured to determine whether a discharge temperature of the compressor (100) is higher than a preset value; and if the exhaust temperature of the compressor (100) is higher than a preset value, controlling the temperature regulating system to work in a cooling execution mode. According to the scheme, the temperature in the compressor shell is automatically adjusted by utilizing the liquid refrigerant of the outlet of the condenser, the exhaust temperature of the compressor can be prevented from being too high, and the running performance and the reliability of an air conditioning system are favorably improved.
Description
Technical Field
The invention belongs to the technical field of air conditioning systems, and particularly relates to a control device and a control method of an air conditioning system and the air conditioning system, in particular to a control device of the air conditioning system with self-regulation of temperature in a rotor compressor shell, a control method of the air conditioning system with self-regulation of temperature in the rotor compressor shell, and the air conditioning system with the control device of the air conditioning system with self-regulation of temperature in the rotor compressor shell (namely the air conditioning system with self-regulation of temperature in the rotor compressor shell).
Background
The exhaust temperature of the compressor has important influence on the running performance and reliability of the air conditioning system, and the running performance and reliability of the air conditioning system are influenced by overhigh exhaust temperature of the compressor. However, the difficulty of reducing the exhaust temperature of the compressor is high, so that safe, reliable and intelligent adjustment of the exhaust temperature of the compressor is a problem to be solved at present.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention aims to provide a control device and a control method of an air conditioning system and the air conditioning system, which are used for solving the problem that the running performance and the reliability of the air conditioning system are influenced by overhigh exhaust temperature of a compressor, achieving the effect of automatically adjusting the temperature in a compressor shell by utilizing a liquid refrigerant at the outlet of a condenser, avoiding overhigh exhaust temperature of the compressor and being beneficial to improving the running performance and the reliability of the air conditioning system.
The present invention provides a control device for an air conditioning system, the air conditioning system including: a heat exchange system and a temperature regulating system; the heat exchange system comprises: a compressor, an outdoor heat exchanger and an indoor heat exchanger; the temperature adjusting system can work in a refrigerant storage mode or a cooling execution mode; in the refrigerant storage mode, the temperature adjusting system guides a liquid refrigerant, which is taken as an outlet of one heat exchanger of the condenser, of the outdoor heat exchanger and the indoor heat exchanger to a high-pressure cavity of the compressor; in the cooling execution mode, cooling the exhaust temperature of the compressor by using a liquid refrigerant led out from the outlet of the condenser; the control device of the air conditioning system comprises: a temperature detection unit and a control unit; the control unit is configured to control the temperature adjusting system to work in the refrigerant storage mode under the condition that the heat exchange system is in refrigeration or heating operation; the temperature detection unit is configured to acquire a discharge temperature of the compressor; the control unit further configured to determine whether a discharge temperature of the compressor is higher than a preset value; and if the exhaust temperature of the compressor is higher than the preset value, controlling the temperature regulating system to work in the cooling execution mode.
In some embodiments, the heat exchange system further comprises: a throttling unit; an exhaust port of the compressor is communicated to a first port of the outdoor heat exchanger; the air suction port of the compressor is communicated to the first port of the indoor heat exchanger; the second port of the outdoor heat exchanger is communicated to the first port of the throttling unit; the second port of the throttling unit is communicated to the second port of the indoor heat exchanger; the temperature regulating system comprises: a liquid storage tank; the liquid storage tank is provided with an inlet, an outlet and an air pressure balancing port; the air pressure balancing port of the liquid storage tank is used for balancing the air pressure of the inlet of the liquid storage tank and the air pressure of the outlet of the liquid storage tank; the outlet of the liquid storage tank is communicated to a high-pressure cavity connecting pipe of the compressor; under the condition that a pipeline between a second port of a condenser in the outdoor heat exchanger and the indoor heat exchanger and an inlet of the liquid storage tank are communicated, and a pipeline between a second port of the throttling unit and an air pressure balance port of the liquid storage tank is communicated, the temperature regulating system works in the refrigerant storage mode; and under the condition that a pipeline between a first port of the condenser in the outdoor heat exchanger and the indoor heat exchanger and an inlet of the liquid storage tank are communicated and a pipeline between a second port of the throttling unit and an air pressure balancing port of the liquid storage tank is closed, the temperature regulating system works in the cooling execution mode.
In some embodiments, the inlet of the fluid reservoir and the air pressure balancing port of the fluid reservoir are both located at the top of the fluid reservoir; the outlet of the liquid storage tank is positioned at the bottom of the liquid storage tank; in the vertical position, the height of the bottom of the liquid storage tank is higher than that of the high-pressure cavity connecting pipe of the compressor.
In some embodiments, the temperature conditioning system further comprises: a switching unit and a switching unit; wherein the content of the first and second substances,
the switching unit is provided with a first inlet, a second inlet and an outlet; first ports of condensers in the outdoor heat exchanger and the indoor heat exchanger are communicated to a first inlet of the switching unit; second ports of condensers in the outdoor heat exchanger and the indoor heat exchanger are communicated to a second inlet of the switching unit; the outlet of the switching unit is communicated to the inlet of the liquid storage tank; the second port of the throttling unit is communicated to the air pressure balancing port of the liquid storage tank after passing through the switch unit; under the condition that a pipeline between a second inlet of the switching unit and an outlet of the switching unit is connected and the switch unit is closed, the temperature regulating system works in the refrigerant storage mode; and under the conditions that a pipeline between the second inlet of the switching unit and the outlet of the switching unit is connected and the switch unit is opened, the temperature regulating system works in the refrigerant storage mode.
In some embodiments, the switching unit includes: a three-way reversing valve; the switching unit includes: an electromagnetic valve.
In some embodiments, the temperature conditioning system further comprises: a first unidirectional unit and a second unidirectional unit; the first unidirectional unit is arranged between the outlet of the switching unit and the inlet of the liquid storage tank; the second one-way unit is arranged between the outlet of the liquid storage tank and the high-pressure cavity connecting pipe of the compressor.
In some embodiments, the heat exchange system further comprises: a four-way valve; the first valve port of the four-way valve is communicated to the first port of the outdoor heat exchanger; the second valve port of the four-way valve is communicated to the air suction port of the compressor; the third valve port of the four-way valve is communicated to the first port of the indoor heat exchanger; the fourth valve port of the four-way valve is communicated to the exhaust port of the compressor; under the condition that the air conditioning system can work in a refrigerating mode and a heating mode in a switching way by reversing the four-way valve, the number of the switching units is two; in the two sets of switching units, the first set of switching unit is arranged between the outdoor heat exchanger and the inlet of the liquid storage tank, and the second set of switching unit is arranged between the indoor heat exchanger and the inlet of the liquid storage tank; correspondingly, under the condition that the temperature regulating system further comprises two sets of first one-way units; under the condition of two sets of the first one-way units, the first set of the first one-way units is arranged between the outlet of the first set of the switching unit and the inlet of the liquid storage tank; the second set of the first one-way unit is arranged between the outlet of the second set of the switching unit and the inlet of the liquid storage tank.
In some embodiments, the control device of an air conditioning system further includes: a liquid level detection unit; the liquid level detection unit is configured to acquire the liquid level of a liquid refrigerant in the liquid storage tank; the control unit is further configured to determine whether the liquid level of the liquid refrigerant in the liquid storage tank is lower than a set minimum liquid level threshold value after controlling the temperature regulation system to work in the cooling execution mode; if the liquid level of the liquid refrigerant in the liquid storage tank is not lower than the set minimum liquid level threshold value, returning to continuously determine whether the exhaust temperature of the compressor is higher than a preset value; and if the exhaust temperature of the compressor is not higher than the preset value or if the liquid level of the liquid refrigerant in the liquid storage tank is lower than a set minimum liquid level threshold value, controlling the cooling execution mode to be closed and controlling the refrigerant storage mode to be opened.
In some embodiments, the control device of an air conditioning system further includes: the control unit is further configured to determine whether the liquid level of the liquid refrigerant in the liquid storage tank is higher than a set maximum liquid level threshold value after controlling the cooling execution mode to be turned off; if the liquid level of the liquid refrigerant in the liquid storage tank is higher than a set maximum liquid level threshold value, controlling the refrigerant storage mode to be closed, and returning to continuously determine whether the exhaust temperature of the compressor is higher than a preset value; and if the liquid level of the liquid refrigerant in the liquid storage tank is not higher than the set maximum liquid level threshold, continuing to control the refrigerant storage mode and continuously determining whether the liquid level of the liquid refrigerant in the liquid storage tank is higher than the set maximum liquid level threshold.
In accordance with another aspect of the present invention, there is provided an air conditioning system including: the control device of the air conditioning system described above.
In a further aspect of the present invention, the temperature control system is controlled to operate in the refrigerant storage mode under the condition that the heat exchange system performs cooling or heating operation; acquiring the exhaust temperature of the compressor; determining whether a discharge temperature of the compressor is higher than a preset value; and if the exhaust temperature of the compressor is higher than the preset value, controlling the temperature regulating system to work in the cooling execution mode.
In some embodiments, the control method of an air conditioning system further includes: acquiring the liquid level of a liquid refrigerant in the liquid storage tank; after the temperature regulating system is controlled to work in the cooling execution mode, whether the liquid level of the liquid refrigerant in the liquid storage tank is lower than a set minimum liquid level threshold value or not is determined; if the liquid level of the liquid refrigerant in the liquid storage tank is not lower than the set minimum liquid level threshold value, returning to continuously determine whether the exhaust temperature of the compressor is higher than a preset value; and if the exhaust temperature of the compressor is not higher than the preset value or if the liquid level of the liquid refrigerant in the liquid storage tank is lower than a set minimum liquid level threshold value, controlling the cooling execution mode to be closed and controlling the refrigerant storage mode to be opened.
In some embodiments, the control method of an air conditioning system further includes: after the cooling execution mode is controlled to be closed, whether the liquid level of the liquid refrigerant in the liquid storage tank is higher than a set maximum liquid level threshold value or not is determined; if the liquid level of the liquid refrigerant in the liquid storage tank is higher than a set maximum liquid level threshold value, controlling the refrigerant storage mode to be closed, and returning to continuously determine whether the exhaust temperature of the compressor is higher than a preset value; and if the liquid level of the liquid refrigerant in the liquid storage tank is not higher than the set maximum liquid level threshold, continuing to control the refrigerant storage mode and continuously determining whether the liquid level of the liquid refrigerant in the liquid storage tank is higher than the set maximum liquid level threshold.
Therefore, according to the scheme of the invention, the exhaust temperature of the compressor is monitored by improving the refrigeration pipeline of the air conditioning system again, and under the condition of higher exhaust temperature of the compressor, the liquid refrigerant at the outlet of the condenser in the air conditioning system is shunted to the high-pressure cavity of the compressor by using the improved refrigeration pipeline of the air conditioning system again, so that the temperature in the shell of the compressor can be adjusted, and the exhaust temperature of the compressor can be reduced; therefore, the temperature in the compressor shell is automatically adjusted by utilizing the liquid refrigerant at the outlet of the condenser, the overhigh exhaust temperature of the compressor can be avoided, and the running performance and the reliability of the air conditioning system are favorably improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural diagram of a control device of an air conditioning system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an operating circuit of the air conditioning system under a refrigeration condition;
FIG. 3 is a schematic diagram of an operation pipeline of an air conditioning system under a heating condition;
FIG. 4 is a schematic control flow diagram of an air conditioning system (taking a refrigeration condition as an example);
FIG. 5 is a flowchart illustrating an embodiment of a control method of an air conditioning system according to the present invention;
FIG. 6 is a schematic flow chart illustrating an embodiment of determining whether the refrigerant storage level is lower than the minimum level threshold after controlling the cooling execution mode in the method of the present invention;
fig. 7 is a flowchart illustrating an embodiment of determining whether the refrigerant storage level is higher than the maximum level threshold after the cooling execution mode is turned off in the method of the present invention.
The reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:
100-compressors (e.g. rotary compressors); 200-an outdoor heat exchanger; 300-indoor heat exchanger; 400-a throttle valve; 500-a liquid storage tank; 600-a four-way valve; 101-compressor suction; 102-compressor discharge; 103-high pressure chamber connection pipe of compressor; 1041 — a first temperature sensor; 1042 — a second temperature sensor; 5011-a first two-position three-way reversing valve; 5012-a second two-position three-way directional valve; 502-a controller; 503-electromagnetic valve; 5041-a first one-way valve; 5042-a second one-way valve; 5043-a third one-way valve; 505-ball float valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
It is considered that the compressor discharge temperature is too high, which may cause some hazards, such as: the compressor is overheated and overloaded, and the cylinder body of the compressor is damaged in serious cases, so that potential safety hazards are caused; the gas transmission coefficient of a refrigeration system where the compressor is located is reduced, the shaft power is increased, the viscosity of lubricating oil is reduced due to long-term overhigh temperature, subsequent serious accidents such as cylinder abrasion, tile burning and the like are caused, and the loss is huge; the overheating environmental temperature can cause the abnormal expansion of the compressor component, and can seriously cause the blockage in the cylinder, thereby causing the failure of the built-in motor of the closed compressor; the refrigerant and the lubricating oil are deteriorated, the refrigerant and the lubricating oil can be subjected to catalytic thermal decomposition under the high-temperature condition, harmful acidic substances, carbon compounds and moisture are formed in the compressor and are accumulated on the exhaust valve, poor sealing can be caused, the flow resistance is increased, and foreign matters such as metal and the like can block components such as pipelines, valves, capillary tubes or dryers and the like, so that the safety of a refrigeration system is seriously threatened; excessive vapor discharge temperatures can directly affect compressor operating life, and the like.
For a totally-enclosed compressor, the reasonable exhaust temperature can enable an air conditioning system to be in a proper operation condition. In some schemes, the reduction of the exhaust temperature of the compressor is mainly realized by a liquid spraying cooling method. The liquid-spraying cooling method can be divided into a liquid-spraying cooling method before a throttle valve and a liquid-spraying cooling method after the throttle valve. The throttling valve front liquid spraying cooling method is that a part of low-temperature high-pressure liquid refrigerant (namely, liquid refrigerant condensed by a condenser) is led out of the front of a throttling device of an air conditioning system to spray liquid to an air suction port of a compressor, although a good cooling effect can be achieved, in application, the liquid is brought into suction due to poor flow control during system operation, and the service life and reliability of the compressor are further affected.
The liquid spraying cooling method after the throttle valve is that partial low-temperature and low-pressure refrigerant liquid is led out from the back of the throttling device of the air conditioning system, but in practical application, the pressure behind the throttling device of the air conditioning system is almost equal to the suction gas of the compressor, and the liquid flow is not easy to control, so the method is rarely adopted for reducing the exhaust temperature of the compressor.
According to an embodiment of the present invention, there is provided a control apparatus of an air conditioning system. Referring to fig. 1, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The air conditioning system includes: a heat exchange system and a temperature regulating system. The heat exchange system comprises: a compressor 100, an outdoor heat exchanger 200, and an indoor heat exchanger 300. The compressor 100, the outdoor heat exchanger 200, and the indoor heat exchanger 300 are communicated with each other through a pipe to form a heat exchange flow path. The temperature adjusting system can work in a refrigerant storage mode or a cooling execution mode. In the refrigerant storage mode, more specifically, in the case that the heat exchange system operates in the cooling mode or the heating mode, that is, in the case that the heat exchange system operates in the cooling or heating mode, the temperature adjustment system guides the liquid refrigerant at the outlet of one of the outdoor heat exchanger 200 and the indoor heat exchanger 300, which is used as a condenser, into the high-pressure chamber of the compressor 100. In the cooling execution mode, more specifically, when the discharge temperature of the compressor 100 is higher than a preset value, the discharge temperature of the compressor 100 is cooled by using the liquid refrigerant that is led out from the outlet of the condenser.
The control device of the air conditioning system comprises: a temperature detection unit and a control unit. A temperature detection unit such as a first temperature sensor 1041, a second temperature sensor 1042, etc., and a control unit such as a controller 502.
The control unit is configured to control the temperature adjustment system to operate in the refrigerant storage mode under the condition that the heat exchange system performs cooling or heating operation, so as to guide a liquid refrigerant, which is used as an outlet of one heat exchanger of the condenser, of the outdoor heat exchanger 200 and the indoor heat exchanger 300 into the high-pressure chamber of the compressor 100.
The temperature detection unit is configured to acquire a discharge temperature of the compressor 100.
The control unit is further configured to determine whether a discharge temperature of the compressor 100 is higher than a preset value. And the number of the first and second groups,
the control unit is further configured to control the temperature adjustment system to operate in the cooling execution mode if the discharge temperature of the compressor 100 is higher than the preset value, so as to cool the discharge temperature of the compressor 100 by using the liquid refrigerant led out from the outlet of the condenser.
The scheme of the invention provides an air conditioning system with self-regulation of the shell temperature of a compressor and a control logic thereof, the self-regulation of the exhaust temperature of the compressor 100 can be realized by improving the pipeline of the refrigeration air conditioning system again and applying the technologies of sensing, electric control and the like, the control logic of the air conditioning system under the corresponding working condition is designed, and the intellectualization of the control of the air conditioning system is realized. By monitoring the exhaust temperature of the compressor 100 and combining with a newly improved refrigeration air-conditioning system pipeline, the function of automatically adjusting the temperature in the shell of the compressor 100 by shunting the liquid refrigerant at the outlet of the condenser into the high-pressure cavity of the compressor 100 under the condition that the exhaust temperature of the compressor 100 is higher can be realized.
In some embodiments, the heat exchange system further comprises: a throttle unit, such as throttle valve 400. The throttling unit is disposed in a pipe between the outdoor heat exchanger 200 and the indoor heat exchanger 300. Specifically, the discharge port 102 of the compressor 100 is connected to a first port of the outdoor heat exchanger 200. A suction port 101 of the compressor 100 is connected to a first port of the indoor heat exchanger 300. The second port of the outdoor heat exchanger 200 is communicated to the first port of the throttling unit. And a second port of the throttling unit is communicated to a second port of the indoor heat exchanger 300.
The temperature regulating system comprises: a liquid storage tank 500. The reservoir 500 has an inlet, an outlet, and a pressure equalization port. The air pressure balancing port of the liquid storage tank 500 is used for balancing the air pressure at the inlet of the liquid storage tank 500 and the air pressure at the outlet of the liquid storage tank 500. The outlet of the liquid storage tank 500 is communicated to the high-pressure cavity connecting pipe 103 of the compressor 100.
Under the condition that the pipelines between the second ports of the condensers of the outdoor heat exchanger 200 and the indoor heat exchanger 300 and the inlet of the liquid storage tank 500 are communicated and the pipelines between the second ports of the throttling units and the air pressure balance port of the liquid storage tank 500 are communicated, the temperature regulating system works in the refrigerant storage mode.
Under the condition that the pipeline between the first ports of the condensers of the outdoor heat exchanger 200 and the indoor heat exchanger 300 and the inlet of the liquid storage tank 500 is connected and the pipeline between the second port of the throttling unit and the air pressure balancing port of the liquid storage tank 500 is closed, the temperature regulating system works in the cooling execution mode.
According to the scheme of the invention, the exhaust temperature of the compressor 100 can be effectively reduced by adjusting the temperature in the shell of the compressor 100, the operation faults of the compressor 100 caused by overhigh exhaust temperature of the compressor 100 are reduced, the reliability of the compressor 100 is improved, the operation performance of an air conditioning system is further ensured, and the reliability of the air conditioning system is improved. In addition, the liquid refrigerant condensed by the condenser in the air conditioning system is used for reducing the exhaust temperature of the compressor 100 and the temperature in the shell of the compressor 100, so that the exhaust temperature of the compressor 100 and the temperature in the shell of the compressor 100 can be effectively reduced, the heating loss of the refrigerant can be reduced, and the energy efficiency of the compressor 100 is improved. In addition, the exhaust temperature of the compressor 100 and the shell temperature of the compressor 100 are reduced by using the liquid refrigerant condensed by the condenser in the air conditioning system, and the refrigerant directly enters the high-pressure cavity of the compressor 100 without participating in the compression process, thereby being beneficial to reducing the power consumption of the compressor 100.
In some embodiments, the inlet of the fluid reservoir 500 and the air pressure equalization port of the fluid reservoir 500 are both located at the top of the fluid reservoir 500. The outlet of the liquid storage tank 500 is positioned at the bottom of the liquid storage tank 500. In the vertical position, the height of the bottom of the liquid storage tank 500 is higher than the height of the high-pressure chamber connection pipe 103 of the compressor 100.
According to the scheme of the invention, the pipeline of the refrigeration air-conditioning system is improved again, the liquid storage tank 500 is arranged in the pipeline of the air-conditioning system, the port at the left upper end of the liquid storage tank 500 is an inlet of the liquid storage tank 500, the port at the right upper end of the liquid storage tank 500 is a balance port of the liquid storage tank 500, and the port at the bottom end of the liquid storage tank 500 is an outlet of the liquid storage tank 500. Thus, a liquid storage tank 500 is added in the air conditioning system, and the liquid refrigerant at the outlet of the condenser is introduced into the high-pressure cavity of the compressor 100, so that the purpose of reducing the temperature in the shell of the compressor 100 is achieved, and the compressor 100 has higher energy efficiency and better reliability.
In some embodiments, the temperature conditioning system further comprises: a switching unit such as a two-position three-way reversing valve, and a switching unit such as a solenoid valve 503.
Wherein the switching unit has a first inlet, a second inlet and an outlet.
First ports of the condensers of the outdoor heat exchanger 200 and the indoor heat exchanger 300 are communicated to a first inlet of the switching unit. Second ports of the condensers of the outdoor heat exchanger 200 and the indoor heat exchanger 300 are communicated to a second inlet of the switching unit. The outlet of the switching unit is communicated to the inlet of the liquid storage tank 500. And the second port of the throttling unit is communicated to the air pressure balancing port of the liquid storage tank 500 after passing through the switch unit.
And under the condition that a pipeline between the second inlet of the switching unit and the outlet of the switching unit is connected and the switch unit is closed, the temperature regulating system works in the refrigerant storage mode.
And under the conditions that a pipeline between the second inlet of the switching unit and the outlet of the switching unit is connected and the switch unit is opened, the temperature regulating system works in the refrigerant storage mode.
In some embodiments, the switching unit includes: three-way reversing valves, such as a first two-position three-way reversing valve 5011, a second two-position three-way reversing valve 5012, and the like. The switching unit includes: a solenoid valve 503.
In the scheme of the invention, the liquid refrigerant after the condenser is stored in the liquid storage tank 500, and the temperature sensor, the two-way three-way reversing valve (such as the first two-position three-way reversing valve 5011 and the second two-position three-way reversing valve 5012), the one-way electromagnetic valve (such as the first one-way valve 5041, the second one-way valve 5042, the third one-way valve 5043 and the electromagnetic valve 503) and other parts are additionally arranged, so that the air conditioning system can be controlled more safely and reliably, and the requirement on the exhaust temperature of the compressor 100 can be met. Therefore, the start and stop of the cooling module are automatically controlled through the collected temperature of the temperature sensor, so that the control of the air conditioning system is more intelligent and reliable.
In some embodiments, the temperature conditioning system further comprises: a first one-way unit such as a first one-way valve 5041, and a second one-way unit such as a second one-way valve 5043.
Wherein the first unidirectional unit is arranged between the outlet of the switching unit and the inlet of the liquid storage tank 500. The first unidirectional unit can limit the flow direction between the outlet of the switching unit and the inlet of the liquid storage tank 500 to be from the outlet of the switching unit to the inlet of the liquid storage tank 500 under the condition of opening.
The second one-way unit is disposed between the outlet of the liquid storage tank 500 and the high pressure chamber connection pipe 103 of the compressor 100. When the second one-way unit is opened, the flow direction between the outlet of the liquid storage tank 500 and the high-pressure chamber connection pipe 103 of the compressor 100 can be limited to be from the outlet of the liquid storage tank 500 to the high-pressure chamber connection pipe 103 of the compressor 100.
In the scheme of the invention, the method for improving the pipeline of the refrigeration air-conditioning system comprises the following steps: the liquid storage tank 500 is arranged, the liquid refrigerant after the condenser is stored in the liquid storage tank 500, and the refrigerant in the liquid storage tank 500 flows into the high-pressure cavity of the compressor 100 through the one-way valve (such as the third one-way valve 5043) under the action of gravity, so that the aim of directly and efficiently reducing the temperature in the shell of the compressor 100 is fulfilled. The liquid refrigerant condensed by a condenser in the air conditioning system is guided to the liquid storage tank 500, and then is reversed by the two-position three-way reversing valve (such as the first two-position three-way reversing valve 5011 and the second two-position three-way reversing valve 5012), so that the pressure at the inlet and the outlet of the liquid storage tank 500 is balanced, the liquid refrigerant flows to the high-pressure cavity of the compressor (such as a rotor compressor) 100 under the action of gravity and is mixed with the high-temperature and high-pressure refrigerant gas in the high-pressure cavity of the compressor 100, the temperature in the shell of the compressor 100 can be directly and effectively reduced, and the exhaust temperature of the compressor 100 is further reduced.
Wherein, the bottom end of the liquid storage tank 500 is provided with a branch pipe, and the branch pipe at the bottom end of the liquid storage tank 500 is connected to the inside of the shell of the compressor 100. A check valve (e.g., a third check valve 5043) is installed on a branch pipe at the bottom end of the liquid storage tank 500 to prevent gas at the high pressure end of the compressor 100 from flowing back to the liquid storage tank 500. The bottom end of the liquid storage tank 500 is higher than a pipeline interface on the shell of the compressor 100 (namely, the pipeline interface connected with the bottom end of the liquid storage tank 500 on the shell of the compressor 100), so that refrigerant liquid can be introduced into the shell of the compressor 100 under the action of gravity, high-temperature and high-pressure gas in the compressor 100 is mixed with high-pressure liquid of the branch (namely, liquid refrigerant flowing into the compressor 100 from the liquid storage tank 500), and the temperature of the shell of the compressor 100 is efficiently and reliably reduced.
In some embodiments, the heat exchange system further comprises: four-way valve 600. The first port of the four-way valve 600 is communicated to the first port of the outdoor heat exchanger 200. The second port of the four-way valve 600 is connected to the suction port 101 of the compressor 100. The third port of the four-way valve 600 communicates with the first port of the indoor heat exchanger 300. The fourth port of the four-way valve 600 is connected to the exhaust port 102 of the compressor 100.
Under the condition that the air conditioning system can work in a cooling mode and a heating mode in a switching manner by reversing the four-way valve 600, the number of the switching units is two. In the two sets of switching units, the first set of switching unit is arranged between the outdoor heat exchanger 200 and the inlet of the liquid storage tank 500, and the second set of switching unit is arranged between the indoor heat exchanger 300 and the inlet of the liquid storage tank 500.
Correspondingly, under the condition that the temperature regulating system further comprises two sets of first one-way units. Under the condition of two sets of the first unidirectional units, the first set of the first unidirectional units is arranged between the outlet of the first set of the switching unit and the inlet of the liquid storage tank 500. The second set of the first unidirectional units is disposed between the outlet of the second set of the switching units and the inlet of the liquid storage tank 500.
In the scheme of the invention, the method for improving the pipeline of the refrigeration air-conditioning system again specifically comprises the following steps: two-position three-way reversing valves (such as a first two-position three-way reversing valve 5011 and a second two-position three-way reversing valve 5012) are arranged and connected with the liquid storage tank 500, the exhaust port of the compressor 100 and the outlet of the condenser, the two-position three-way reversing valves (such as the first two-position three-way reversing valve 5011 and the second two-position three-way reversing valve 5012) are connected with the temperature sensors (such as the first temperature sensor 1041 and the second temperature sensor 1042) at the exhaust port 102 of the compressor 100 through the controller 502, the exhaust temperature signals of the compressor 100 are transmitted to the controller 502, the controller 502 makes judgment and transmits action signals to the two-position three-way reversing valves (such as the first two-position three-way reversing valve 5011 and the second two-position three-way reversing valve 5012), so that the circulation mode of the two-position three-way reversing valves (such as the first two-position three-way reversing valve 5011 and the second two-position three-way reversing valve 5012) is controlled, and the control of the air conditioning system is more accurate, And (4) intelligentizing.
Thus, two-position three-way reversing valves (such as a first two-position three-way reversing valve 5011 and a second two-position three-way reversing valve 5012) are added and respectively connected with the air outlet 102 of the compressor 100, the outlet of the condenser and the inlet of the liquid storage tank 500, the liquid refrigerant at the outlet of the condenser is led to the inlet of the liquid storage tank 500 through the two-position three-way reversing valves (such as the first two-position three-way reversing valve 5011 and the second two-position three-way reversing valve 5012), then the air outlet 102 of the compressor 100 is communicated with the inlet of the liquid storage tank 500 by switching the positions of the two-position three-way reversing valves (such as the first two-position three-way reversing valve 5011 and the second two-position three-way reversing valve 5012), because the outlet of the liquid storage tank 500 is connected with the high-pressure cavity of the compressor 100 through the high-pressure cavity connecting pipe 103 of the compressor 100, the pressure of the inlet and the outlet of the liquid storage tank 500 is balanced, and the liquid refrigerant flows into the high-pressure cavity of the compressor 100 from the outlet of the liquid storage tank 500 through the action of gravity.
In the scheme of the invention, the method for improving the pipeline of the refrigeration air-conditioning system again specifically comprises the following steps: the end of the throttling device (such as the throttle valve 400) of the air conditioning system is connected with the balance port of the liquid storage tank 500 through a pipeline, the electromagnetic valve 503 is connected on the pipeline, when the electromagnetic valve 503 is opened, the formed negative pressure drives the liquid refrigerant at the outlet of the condenser to flow into the liquid storage tank 500 due to the smaller pressure behind the throttle valve 400 (namely, the end of the throttle valve 400 close to the electromagnetic valve 503).
Thus, a branch pipe is led out from the pipeline after throttling of the throttle valve 400 to the balance port of the liquid storage tank 500, the electromagnetic valve 503 is installed on the branch pipe, when the electromagnetic valve 503 is opened, the formed negative pressure drives the liquid refrigerant after the condenser to flow into the liquid storage tank 500 due to the small pressure behind the throttle valve 400. The temperature sensors (such as the first temperature sensor 1041 and the second temperature sensor 1042) are installed at the exhaust port 102 of the compressor 100, and the temperature sensors (such as the first temperature sensor 1041 and the second temperature sensor 1042) and the two-position three-way reversing valve (such as the first two-position three-way reversing valve 5011 and the second two-position three-way reversing valve 5012) are connected with the controller 502, so that the flow mode and the flow rate of the two-position three-way reversing valve (such as the first two-position three-way reversing valve 5011 and the second two-position three-way reversing valve 5012) can be automatically adjusted by monitoring the exhaust temperature of the exhaust port 102 of the compressor 100, and the adjustment of the exhaust temperature of the compressor 100 in the air conditioning system is more intelligent.
In some embodiments, the control device of an air conditioning system further includes: a liquid level detection unit such as a ball float valve 505 disposed within the fluid reservoir 500.
The liquid level detection unit is configured to obtain a liquid level of a liquid refrigerant in the liquid storage tank 500.
The control unit is further configured to determine whether the liquid level of the liquid refrigerant in the liquid storage tank 500 is lower than a set minimum liquid level threshold value after controlling the temperature adjustment system to operate in the cooling execution mode.
The control unit is further configured to return to continuously determine whether the discharge temperature of the compressor 100 is higher than a preset value if the liquid level of the liquid refrigerant in the liquid storage tank 500 is not lower than a preset minimum liquid level threshold value.
The control unit is further configured to control the temperature adjustment system to stop working in the cooling execution mode if the exhaust temperature of the compressor 100 is not higher than the preset value or if the liquid level of the liquid refrigerant in the liquid storage tank 500 is lower than a set minimum liquid level threshold value, that is, control the cooling execution mode to be closed, and control the refrigerant storage mode to be opened, so as to control the temperature adjustment system to work in the refrigerant storage mode again. That is, the cooling execution mode is controlled to be switched to the refrigerant storage mode.
In the scheme of the invention, the method for improving the pipeline of the refrigeration air-conditioning system again specifically comprises the following steps: a ball float valve 505 is arranged in the liquid storage tank 500, and the ball float valve 505 controls the opening and closing of the electromagnetic valve 503 on one hand and controls the reversing of the two-position three-way reversing valve (such as a first two-position three-way reversing valve 5011 and a second two-position three-way reversing valve 5012) on the other hand.
Thus, the float valve 505 can flexibly regulate and control the refrigerant quantity in the liquid storage tank 500 according to the running state of the air conditioning system and the condition of the liquid level in the liquid storage tank 500, and the running safety and reliability of the air conditioning system are practically ensured.
In the air conditioning system according to the aspect of the present invention, the first port of the outdoor heat exchanger 200 is connected to the first port of the four-way valve 600, the second port of the four-way valve 600 is connected to the exhaust port 102 of the compressor 100, the third port of the four-way valve 600 is connected to the suction port 101 of the compressor 100, and the fourth port of the four-way valve 600 is connected to the first port of the indoor heat exchanger 300. A second port of the outdoor heat exchanger 200 is communicated to a first port of the throttle valve 400, and a second port of the throttle valve 400 is communicated to a second port of the indoor heat exchanger 300. A first port of the outdoor heat exchanger 200 is communicated to a first port of the first two-position three-way reversing valve 5011, and a second port of the outdoor heat exchanger 200 is communicated to a second port of the first two-position three-way reversing valve 5011. The third port of the first two-position three-way reversing valve 5011 is communicated to the inlet of the liquid storage tank 500 through a first check valve 5041, and the third port of the second two-position three-way reversing valve 5012 through a second check valve 5042. The second port of the throttle valve 400 is connected to the balance port of the reservoir 500 via the solenoid valve 503. The outlet of the liquid storage tank 500 passes through the third check valve 5043 and then is communicated to the high pressure cavity connecting pipe 103 of the compressor 100. A first valve port of the second two-position three-way reversing valve 5012 is communicated to a first port of the indoor heat exchanger 300, and a second valve port of the second two-position three-way reversing valve 5012 is communicated to a second port of the indoor heat exchanger 300.
In some embodiments, the control device of an air conditioning system further includes:
the control unit is further configured to continue to control the operation of the heat exchange system after controlling the cooling execution mode to be turned off, and determine whether the liquid level of the liquid refrigerant in the liquid storage tank 500 is higher than a set maximum liquid level threshold value.
The control unit is further specifically configured to control the refrigerant storage mode to be turned off if the liquid level of the liquid refrigerant in the liquid storage tank 500 is higher than a set maximum liquid level threshold, and return to continuously determine whether the discharge temperature of the compressor 100 is higher than a preset value.
The control unit is further specifically configured to continue to control the refrigerant storage mode and continue to determine whether the liquid level of the liquid refrigerant in the liquid storage tank 500 is higher than a set maximum liquid level threshold value if the liquid level of the liquid refrigerant in the liquid storage tank 500 is not higher than the set maximum liquid level threshold value.
Fig. 2 is a schematic diagram illustrating an operation of the air conditioning system in a cooling operation mode, and fig. 3 is a schematic diagram illustrating an operation of the air conditioning system in a heating operation mode. The following describes an exemplary implementation process of the scheme of the present invention with reference to the examples shown in fig. 2 and fig. 3.
Taking the operation schematic diagram of the air conditioning system under the refrigeration condition shown in fig. 2 as an example, the air conditioning system has two secondary flow paths. The secondary flow path is relative to the primary flow path. In the aspect of the present invention, the piping necessary for the single cooling/heating heat pump air conditioner is the main piping, and the other piping flow paths are collectively referred to as the sub flow paths. The two secondary flow paths are specifically a refrigerant storage flow path and a cooling execution flow path.
In the refrigerant storage flow path, the first two-position three-way reversing solenoid valve 5011 is in a closed state, and the solenoid valve 503 is opened, so that the refrigerant at the outlet end of the outdoor heat exchanger 200 enters the liquid storage tank through the first two-position three-way reversing solenoid valve 5011. When the first two-position three-way reversing solenoid valve 5011 is in a closed state and the first check valve 5041 is opened, a pipeline between the refrigerant outlet of the outdoor heat exchanger 200 and the inlet of the accumulator 500 is connected. The solenoid valve 503 is opened to communicate the refrigerant outlet of the throttle valve 400 with the accumulator 500, and the refrigerant outlet of the outdoor heat exchanger 200 may flow into the accumulator 500 due to the low pressure of the refrigerant outlet of the throttle valve 400, which causes the pressure inside the accumulator 500 to be low.
Still taking the outdoor heat exchanger 200 as a condenser for exemplary illustration, in the cooling execution flow path, the first two-position three-way reversing valve 5011 is in an open state, the electromagnetic valve 503 is closed, the exhaust port 102 of the compressor 100 is communicated with the inlet of the liquid storage tank 500, at this time, high-temperature and high-pressure gas coming out of the exhaust port 102 of the compressor 100 flows into the liquid storage tank 500 through the first two-position three-way reversing valve 5011, so that the pressures of the inlet and the outlet of the liquid storage tank 500 are balanced, and the liquid refrigerant in the liquid storage tank 500 flows into the shell of the compressor 100 through the action of gravity, so as to reduce the temperature at the upper end of the pump body of the compressor 100 (namely, reduce the temperature of the shell of the compressor 100), thereby achieving the purpose of reducing the exhaust temperature of the compressor 100. When the first two-way three-way selector valve 5011 is opened, the first check valve 5041 is opened, and the compressor 100 is connected to the compressor 100 via the exhaust port 102 and the reservoir 500. The solenoid valve 503 is closed so that the pressure inside the receiver 500 is not lowered, and in case that the pressure inside the receiver 500 is high, the liquid refrigerant inside the receiver 500 flows into the high pressure chamber connection pipe 103 of the compressor 100 through the third check valve 5043 by the action of gravity.
Based on the refrigerant storage flow path and the cooling execution flow path, the specific operation mode for adjusting the exhaust temperature of the compressor 100 is as follows: by adding a liquid storage tank 500 in the air conditioning system, when the refrigerant storage flow path is opened, the liquid storage tank 500 can collect the refrigerant liquid at the outlet of the outdoor heat exchanger 200. In the actual assembly process, the bottom end of the liquid storage tank 500 is higher than the connection position of the liquid storage tank 500 and the compressor (e.g., a rotor compressor) 100, so that the refrigerant liquid at the outlet of the outdoor heat exchanger 200 flows into the high-pressure chamber of the compressor 100 under the action of gravity when the cooling execution flow path is opened.
Wherein, a third one-way valve 5043 is arranged in a pipeline between the bottom end of the liquid storage tank 500 and the high-pressure cavity connecting pipe 103 of the compressor 100. The third check valve 5043 is provided to prevent the refrigerant liquid flowing from the outlet of the outdoor heat exchanger 200 into the high-pressure chamber of the compressor 100 from flowing backward to the accumulator 500 due to gravity.
Meanwhile, in the process of adjusting the air conditioning system, by adding components such as a valve, a sensor and the like, such as the electromagnetic valve 503, the ball float valve 505, the check valve (such as the first check valve 5041, the second check valve 5042 and the third check valve 5043) and the temperature sensor (such as the first temperature sensor 1041 and the second temperature sensor 1042), the operation of the whole air conditioning system can be safer and more reliable.
Further, in the solution of the present invention, when the refrigerant storage flow path is opened, the first two-position three-way reversing solenoid valve 5011 is in a closed state, and the solenoid valve 503 is in an open state, and at this time, because a pressure difference exists at the inlet and the outlet of the liquid storage tank 500, the refrigerant at the outlet end of the outdoor heat exchanger 200 enters the inlet of the liquid storage tank 500 through the first two-position three-way reversing valve 5011, and the refrigerant storage function is executed. The pressure difference existing at the inlet and outlet of the liquid storage tank 500 is mainly because when the air conditioning system operates, the electromagnetic valve 503 of the upper right end pipe section of the liquid storage tank 500 is in an open state and is connected with the low-pressure part of the outlet of the throttle valve 400 (namely behind the throttle valve 400). At this time, the connecting pipe at the left upper end of the liquid storage tank 500 is communicated with the high-pressure part of the inlet of the throttle valve 400 (namely, in front of the throttle valve 400), so that the pressure difference exists at the inlet and the outlet of the liquid storage tank 500.
A first check valve 5041 is connected between the first two-position three-way reversing valve 5011 and the inlet of the liquid storage tank 500 (i.e., the left upper end of the liquid storage tank 500), so as to prevent the refrigerant liquid of the outdoor heat exchanger 200 from flowing back to the indoor heat exchanger 300 due to switching the operating conditions.
Further, in the solution of the present invention, when the cooling execution flow path is opened, the first two-position three-way reversing valve 5011 is in an open state, the electromagnetic valve 503 is closed, the exhaust port 102 of the compressor (e.g., a rotor compressor) 100 is communicated with the liquid storage tank 500, at this time, high-temperature and high-pressure gas coming out of the exhaust port 102 of the compressor (e.g., a rotor compressor) 100 flows into the liquid storage tank 500 through the first two-position three-way reversing valve 5011, so that the pressures at the inlet and the outlet of the liquid storage tank 500 are balanced, and the liquid refrigerant in the liquid storage tank 500 flows into the shell of the compressor 100 through the action of gravity to execute the cooling function.
Further, a first temperature sensor 1041 is connected between the first two-position three-way reversing valve 5011 and the exhaust port 102 of the compressor 100, and the first temperature sensor 1041 may detect the exhaust temperature of the exhaust port 102 of the compressor (e.g., a rotor compressor) 100 and transmit a detected temperature signal to the controller 502. The controller 502 controls the opening and closing of the first two-position three-way directional valve 5011 through a built-in program.
Specifically, when the temperature signal received by the controller 502 is higher than the preset value, the controller 502 controls the first two-position three-way reversing valve 5011 to be in an open state, so that the refrigerant flowing into the liquid storage tank 500 of the air conditioning system flows out, and the flowing liquid refrigerant is mixed with the refrigerant in the high-pressure cavity of the compressor 100, thereby achieving the effect of reducing the exhaust temperature of the compressor 100. When the temperature signal received by the controller 502 is lower than the preset value, the controller 502 controls the first two-position three-way reversing valve 5011 to be in a closed state, and the air conditioning system normally operates.
The preset value is used as a threshold value for determining the discharge temperature of the compressor 100, and may be set according to different operating states of the air conditioning system. For example: the judgment threshold (i.e., the preset value) of the discharge temperature of the compressor 100 may be classified into different temperature levels according to different operation states of the air conditioning system. Such as during operation of the air conditioning system, the compressor 100 discharge temperature value does not exceed 120 c at most. The exhaust temperature of the compressor 100 during refrigeration can be set to 75-100 ℃ in combination with the actual operation condition. The exhaust temperature of the compressor 100 during heating is set to be slightly higher than that of the compressor 100 during cooling, and the exhaust temperature of the compressor 100 during heating is set to be 85-110 ℃.
When the temperature signal of the discharge temperature of the compressor 100 received by the controller 502 is higher than the preset value, the controller 502 controls the first two-position three-way reversing valve 5011 to be in an open state. When the first two-position three-way selector valve 5011 is in the on state, the cooling function is executed, and the cooling execution flow path is connected. In the cooling execution flow path, the first two-position three-way reversing valve 5011 is in an open state, the electromagnetic valve 503 is closed, the third one-way valve 5043 is opened, the exhaust port 102 of the compressor 100 is communicated with the liquid storage tank 500, at the moment, high-temperature and high-pressure gas coming out of the exhaust port 102 of the compressor 100 flows into the liquid storage tank 500 through the first two-position three-way reversing valve 5011, liquid refrigerant in the liquid storage tank 500 flows into the shell of the compressor 100 through the third one-way valve 5043 under the action of gravity, the temperature at the upper end of the pump body of the compressor 100 is reduced, and the purpose of reducing the exhaust temperature of the compressor 100 is further achieved.
Further, the accumulator 500 is provided with a float valve 505, and the float valve 505 is formed by precision casting a material such as brass or high-grade stainless steel which is chemically stable and does not chemically react with the refrigerant and the refrigerant oil, but the material of the float valve 505 is not limited to brass or high-grade stainless steel.
The float valve 505 is capable of controlling the opening and closing of the solenoid valve 503. The refrigerant at the outlet of the outdoor heat exchanger 200 flows into the liquid storage tank 500 through the first two-position three-way reversing valve 5011 and the first check valve 5041, and also flows into the liquid storage tank 500 through the throttle valve 400 and the solenoid valve 503. When the refrigerant liquid in the liquid storage tank 500 is too much, the electromagnetic valve 503 is closed, and the refrigerant in the liquid storage tank 500 is not increased any more. When the refrigerant liquid in the liquid storage tank 500 is not enough, the electromagnetic valve 503 is opened, and the refrigerant in the liquid storage tank 500 is stored continuously, so as to control the refrigerant in the liquid storage tank 500 within a certain range requirement.
In the present embodiment, the refrigerant liquid is too much, and the first set scale when the refrigerant liquid reaches the entire liquid storage tank 500 (in the height direction) is, for example, 2/3 scale. In the present invention, the refrigerant liquid is too little, and the refrigerant in the liquid storage tank 500 reaches the second set scale of the refrigerant pipe (height direction) as shown by the 1/3 scale mark. Specifically, when the liquid level of the refrigerant in the liquid storage tank 500 reaches the 2/3 scale mark, the liquid storage process (i.e., the refrigerant storage function) is not continued, i.e., the liquid level in the liquid storage tank 500 is not increased; when the refrigerant level in the accumulator 500 is reduced to 1/3, the refrigerant storage process of the accumulator 500 is started, and the refrigerant in the accumulator 500 is increased.
The ball float valve 505 can also control the reversing of the first two-position three-way reversing valve 5011, when the first two-position three-way reversing valve 5011 is opened but the liquid refrigerant in the liquid storage tank 500 is too low, the output signal of the ball float valve 505 controls the first two-position three-way reversing valve 5011 to be closed, and the liquid refrigerant in the liquid storage tank 500 stops decreasing. During reversing, the opening and closing of the first two-position three-way reversing valve 5011 are controlled by the ball float valve 505 and the exhaust temperature of the compressor 100 in parallel, and when both conditions meet the opening state, the first two-position three-way reversing valve 5011 is in the opening state. If any one of the conditions is not satisfied, the float valve 505 is in a closed state.
The specific control flow of the float valve 500 may be: a floating ball liquid level transmitter is arranged in the liquid refrigerant in the liquid storage tank 500, so that the liquid level information in the liquid storage tank 500 can be fed back to the controller 502, and the controller 502 further controls the opening and closing of the corresponding electromagnetic valve 503.
Take the operation of the air conditioning system under the refrigeration condition as shown in fig. 3 as an example. In the heating condition, the four-way valve 600 (i.e., the four-way reversing valve) acts, and the operation diagram of the air conditioning system is shown in fig. 3. The outdoor heat exchanger 200 of the air conditioning system is changed from a condenser under a cooling working condition to an evaporator under a heating working condition, and the indoor heat exchanger 300 of the air conditioning system is changed from an evaporator under a cooling working condition to a condenser under a heating working condition. At this time, under the common regulation and control of the second temperature sensor 1042 and the second two-position three-way reversing valve 5012, the liquid storage function of the liquid storage tank 500 and the liquid delivery function to the compressor 100 are realized under the heating condition, so as to reduce the exhaust temperature of the compressor 100.
Furthermore, the second check valve 5042 and the first check valve 5041 are used for preventing the refrigerant liquid of the condenser from flowing back to the evaporator when the air conditioning system is switched between working conditions, namely preventing the refrigerant before the condenser is throttled from flowing back.
In the above embodiment, the solenoid valve 503 may be a general valve and may be controlled manually. And a ball float valve 505 is the preferred improvement point, and can be manually regulated and controlled by setting the liquid storage tank 500 as the liquid storage tank 500 with a visible liquid level. In addition, the float valve 505 can be changed into a magnetic turning plate binding type liquid level transmitter, the refrigerant liquid level information in the liquid storage tank 500 can be remotely fed back, and a negative feedback electric control device is additionally arranged on the liquid level information to control the opening and closing of two-position three-way reversing valves (such as a first two-position three-way reversing valve 5011 and a second two-position three-way reversing valve 5012), so that the refrigerant liquid level condition in the liquid storage tank 500 can be observed more intuitively, and the operation of an air conditioning system can be better evaluated.
According to the scheme of the invention, when the pipeline of the refrigeration air-conditioning system is improved again, the liquid storage tank 500, the two-position three-way reversing valve (such as the first two-position three-way reversing valve 5011 and the second two-position three-way reversing valve 5012), the electromagnetic valve 503, the ball float valve 505, the one-way valve (such as the first one-way valve 5041, the second one-way valve 5042 and the third one-way valve 5043) and the newly-added auxiliary flow path (pipeline) are arranged, and the pipeline is mainly connected on the original basis by additionally arranging the pipeline, so that the exhaust temperature of the compressor can be well regulated and controlled in the heating and refrigeration operation modes.
By adopting the technical scheme of the invention, the exhaust temperature of the compressor is monitored by improving the refrigeration pipeline of the air conditioning system again, and under the condition of higher exhaust temperature of the compressor, the liquid refrigerant at the outlet of the condenser in the air conditioning system is shunted to the high-pressure cavity of the compressor by utilizing the improved refrigeration pipeline of the air conditioning system, so that the temperature in the shell of the compressor can be regulated, and the exhaust temperature of the compressor can be reduced. Therefore, the temperature in the compressor shell is automatically adjusted by utilizing the liquid refrigerant at the outlet of the condenser, the overhigh exhaust temperature of the compressor can be avoided, and the running performance and the reliability of the air conditioning system are favorably improved.
According to an embodiment of the present invention, there is also provided an air conditioning system corresponding to a control device of the air conditioning system. The air conditioning system may include: the control device of the air conditioning system described above.
Since the processing and functions of the air conditioning system of this embodiment are basically corresponding to the embodiments, principles and examples of the apparatus, reference may be made to the related descriptions in the foregoing embodiments without being detailed in the description of this embodiment.
By adopting the technical scheme of the invention, the exhaust temperature of the compressor is monitored by improving the refrigeration pipeline of the air conditioning system again, and under the condition of higher exhaust temperature of the compressor, the liquid refrigerant at the outlet of the condenser in the air conditioning system is shunted to the high-pressure cavity of the compressor by utilizing the improved refrigeration pipeline of the air conditioning system, so that the temperature in the shell of the compressor can be regulated, the exhaust temperature of the compressor is favorably reduced, the running faults of the compressor caused by overhigh exhaust temperature of the compressor are reduced, and the running reliability of the compressor is improved.
According to an embodiment of the present invention, there is also provided a control method of an air conditioning system corresponding to the air conditioning system, as shown in fig. 5, which is a schematic flow chart of an embodiment of the method of the present invention. The control method of the air conditioning system may include: step S110 to step S140.
In step S110, under the condition that the heat exchange system performs cooling or heating operation, the temperature adjustment system is controlled to operate in the refrigerant storage mode, so that the liquid refrigerant at the outlet of one of the heat exchangers of the outdoor heat exchanger 200 and the indoor heat exchanger 300, which is a condenser, is guided into the high-pressure chamber of the compressor 100.
At step S120, the discharge temperature of the compressor 100 is acquired.
At step S130, it is determined whether the discharge temperature of the compressor 100 is higher than a preset value. And the number of the first and second groups,
in step S140, if the discharge temperature of the compressor 100 is higher than the preset value, the temperature adjustment system is controlled to operate in the cooling execution mode, so as to cool the discharge temperature of the compressor 100 by using the liquid refrigerant led out from the outlet of the condenser.
Fig. 4 is a control flow diagram of the air conditioning system (taking a refrigeration condition as an example). Fig. 4 is a schematic control flow diagram of the air conditioning system during cooling operation. As shown in fig. 4, taking the cooling condition as an example, the control flow of the air conditioning system includes:
and step S600, starting to serve as a starting point, and executing a control flow of the air conditioning system under the refrigerating working condition.
And step S601, operating the air conditioning system under a refrigerating working condition.
Step S602, monitoring the discharge temperature of the compressor 100 in real time by using the first temperature sensor 1041.
Step S603, determining whether the discharge temperature of the compressor 100 is higher than a preset value: if yes, go to step S604. Otherwise, step S606 is executed.
In step S604, when the exhaust temperature of the compressor 100 is higher than the preset value, the first two-position three-way reversing valve 5011 is opened.
The scheme of the invention provides an air conditioning system with self-regulation of the shell temperature of a compressor and a control logic thereof, the self-regulation of the exhaust temperature of the compressor 100 can be realized by improving the pipeline of the refrigeration air conditioning system again and applying the technologies of sensing, electric control and the like, the control logic of the air conditioning system under the corresponding working condition is designed, and the intellectualization of the control of the air conditioning system is realized. By monitoring the exhaust temperature of the compressor 100 and combining with a newly improved refrigeration air-conditioning system pipeline, the function of automatically adjusting the temperature in the shell of the compressor 100 by shunting the liquid refrigerant at the outlet of the condenser into the high-pressure cavity of the compressor 100 under the condition that the exhaust temperature of the compressor 100 is higher can be realized.
In some embodiments, the control method of an air conditioning system further includes: and determining whether the refrigerant storage liquid level is lower than the minimum liquid level threshold value after controlling the cooling execution mode.
With reference to the flowchart of fig. 6 showing an embodiment of determining whether the refrigerant storage liquid level is lower than the minimum liquid level threshold after the cooling execution mode is controlled in the method of the present invention, a specific process of determining whether the refrigerant storage liquid level is lower than the minimum liquid level threshold after the cooling execution mode is controlled will be further described, which includes: step S210 to step S240.
Step S210, obtaining a liquid level of the liquid refrigerant in the liquid storage tank 500.
Step S220, after controlling the temperature adjustment system to work in the cooling execution mode, determining whether the liquid level of the liquid refrigerant in the liquid storage tank 500 is lower than a set minimum liquid level threshold.
In step S230, if the liquid level of the liquid refrigerant in the liquid storage tank 500 is not lower than the set minimum liquid level threshold, the process returns to continuously determine whether the discharge temperature of the compressor 100 is higher than the preset value.
Step S240, if the discharge temperature of the compressor 100 is not higher than the preset value, or if the liquid level of the liquid refrigerant in the liquid storage tank 500 is lower than a set minimum liquid level threshold, controlling the temperature adjustment system to stop working in the cooling execution mode, that is, controlling the cooling execution mode to be closed, and controlling the refrigerant storage mode to be opened, so as to control the temperature adjustment system to work in the refrigerant storage mode again. That is, the cooling execution mode is controlled to be switched to the refrigerant storage mode.
As shown in fig. 4, taking the cooling condition as an example, the control flow of the air conditioning system further includes:
in step S603, it is determined whether the discharge temperature of the compressor 100 is higher than a preset value: if not, go to step S606.
In step S604, when it is monitored that the discharge temperature of the compressor 100 is higher than the preset value, the first two-position three-way reversing valve 5011 is opened, and then step S605 is performed.
Step S605, judging whether the liquid level in the liquid storage tank 500 is too low: if yes, go to step S606. Otherwise, the process returns to step S603, and the refrigerant continues to enter the liquid storage tank 500.
And step S606, if the exhaust temperature of the compressor 100 is not higher than the preset value or the liquid level of the liquid storage tank 500 is too low, the first two-position three-way reversing valve 5011 is closed. After that, step S607 and step S610 are executed.
According to the scheme of the invention, the exhaust temperature of the compressor 100 can be effectively reduced by adjusting the temperature in the shell of the compressor 100, the operation faults of the compressor 100 caused by overhigh exhaust temperature of the compressor 100 are reduced, the reliability of the compressor 100 is improved, the operation performance of an air conditioning system is further ensured, and the reliability of the air conditioning system is improved. In addition, the liquid refrigerant condensed by the condenser in the air conditioning system is used to reduce the exhaust temperature of the compressor 100 and the temperature inside the shell of the compressor 100, so that the exhaust temperature of the compressor 100 and the temperature inside the shell of the compressor 100 can be effectively reduced, the heating loss of the refrigerant can be reduced, and the energy efficiency of the compressor 100 can be improved. In addition, the exhaust temperature of the compressor 100 and the shell temperature of the compressor 100 are reduced by using the liquid refrigerant condensed by the condenser in the air conditioning system, and the refrigerant directly enters the high-pressure cavity of the compressor 100 without participating in the compression process, thereby being beneficial to reducing the power consumption of the compressor 100.
In some embodiments, the control method of an air conditioning system further includes: and determining whether the refrigerant storage liquid level is higher than the highest liquid level threshold value after the cooling execution control mode is closed.
With reference to the schematic flow chart of an embodiment of determining whether the refrigerant storage liquid level is higher than the maximum liquid level threshold after the cooling execution mode is turned off in the method of the present invention shown in fig. 7, a specific process of determining whether the refrigerant storage liquid level is higher than the maximum liquid level threshold after the cooling execution mode is turned off is further described, which includes: step S310 to step S330.
Step S310, after the cooling execution mode is controlled to be turned off, continuously controlling the heat exchange system to operate, and determining whether the liquid level of the liquid refrigerant in the liquid storage tank 500 is higher than a set maximum liquid level threshold.
In step S320, if the liquid level of the liquid refrigerant in the liquid storage tank 500 is higher than the set maximum liquid level threshold, the refrigerant storage mode is controlled to be turned off, and the process returns to continuously determine whether the discharge temperature of the compressor 100 is higher than a preset value.
Step S330, if the liquid level of the liquid refrigerant in the liquid storage tank 500 is not higher than the set maximum liquid level threshold, continuing to control the refrigerant storage mode, and continuing to determine whether the liquid level of the liquid refrigerant in the liquid storage tank 500 is higher than the set maximum liquid level threshold.
As shown in fig. 4, taking the cooling condition as an example, the control flow of the air conditioning system further includes:
in step S606, if the discharge temperature of the compressor 100 is not higher than the preset value or the liquid level of the liquid storage tank 500 is too low, the first two-position three-way reversing valve 5011 is closed, and then steps S607 and S610 are performed.
Step S607, judging whether the liquid level of the liquid storage tank 500 is overhigh: if yes, go to step S609. Otherwise, step S608 is executed.
Step S608, if the liquid level in the liquid storage tank 500 is not high, the electromagnetic valve 503 is opened, and the refrigerant liquid from the outdoor heat exchanger 200 can enter the liquid storage tank 500, and then the process returns to step S607.
Step 609, if the liquid level of the liquid storage tank 500 is too high, the electromagnetic valve 503 needs to be closed, so that the liquid from the outdoor heat exchanger 200 cannot flow into the liquid storage tank 500 under the action of pressure, and the step S602 is returned again.
Step S610, after the determination of step S603, if the discharge temperature of the compressor 100 is not higher than the preset value, step S606 is executed to close the first two-position three-way reversing valve 5011, and then the air conditioning system normally operates until step S611 is executed.
And step S611, ending the air conditioning system control flow.
According to the scheme of the invention, the pipeline of the refrigeration air-conditioning system is improved again, the liquid storage tank 500 is arranged in the pipeline of the air-conditioning system, the port at the left upper end of the liquid storage tank 500 is an inlet of the liquid storage tank 500, the port at the right upper end of the liquid storage tank 500 is a balance port of the liquid storage tank 500, and the port at the bottom end of the liquid storage tank 500 is an outlet of the liquid storage tank 500. Thus, a liquid storage tank 500 is added in the air conditioning system, and the liquid refrigerant at the outlet of the condenser is introduced into the high-pressure cavity of the compressor 100, so that the purpose of reducing the temperature in the shell of the compressor 100 is achieved, and the compressor 100 has higher energy efficiency and better reliability.
Since the processing and functions implemented by the method of the present embodiment substantially correspond to the embodiments, principles and examples of the air conditioning system, reference may be made to the related descriptions in the foregoing embodiments without being detailed in the description of the present embodiment.
By adopting the technical scheme of the embodiment, the exhaust temperature of the compressor is monitored by improving the refrigeration pipeline of the air conditioning system again, and under the condition that the exhaust temperature of the compressor is higher, the liquid refrigerant at the outlet of the condenser in the air conditioning system is shunted to the high-pressure cavity of the compressor by utilizing the refrigeration pipeline of the air conditioning system which is improved again, so that the temperature in the compressor shell can be adjusted, the exhaust temperature of the compressor is favorably reduced, and the compressor 100 has higher energy efficiency and better reliability.
In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (13)
1. A control device of an air conditioning system, characterized in that the air conditioning system includes: a heat exchange system and a temperature regulating system; the heat exchange system comprises: a compressor (100), an outdoor heat exchanger (200), and an indoor heat exchanger (300); the temperature adjusting system can work in a refrigerant storage mode or a cooling execution mode; in the refrigerant storage mode, the temperature adjusting system guides a liquid refrigerant at an outlet of one of the outdoor heat exchanger (200) and the indoor heat exchanger (300) serving as a condenser to a high-pressure cavity of the compressor (100); in the cooling execution mode, cooling the exhaust temperature of the compressor (100) by using a liquid refrigerant led out from the outlet of the condenser;
the control device of the air conditioning system comprises: a temperature detection unit and a control unit; wherein the content of the first and second substances,
the control unit is configured to control the temperature adjusting system to work in the refrigerant storage mode under the condition that the heat exchange system operates in a refrigerating or heating mode;
the temperature detection unit is configured to acquire a discharge temperature of the compressor (100);
the control unit being further configured to determine whether a discharge temperature of the compressor (100) is higher than a preset value; and (c) a second step of,
and if the exhaust temperature of the compressor (100) is higher than the preset value, controlling the temperature adjusting system to work in the cooling execution mode.
2. The control device of an air conditioning system according to claim 1, wherein the heat exchange system further comprises: a throttling unit; a discharge port (102) of the compressor (100) communicated to a first port of the outdoor heat exchanger (200); a suction port (101) of the compressor (100) communicated to a first port of the indoor heat exchanger (300); the second port of the outdoor heat exchanger (200) is communicated to the first port of the throttling unit; a second port of the throttling unit is communicated to a second port of the indoor heat exchanger (300);
the temperature regulating system comprises: a liquid storage tank (500); the liquid storage tank (500) is provided with an inlet, an outlet and a pressure balancing port; the air pressure balancing port of the liquid storage tank (500) is used for balancing the air pressure of the inlet of the liquid storage tank (500) and the air pressure of the outlet of the liquid storage tank (500); the outlet of the liquid storage tank (500) is communicated to a high-pressure cavity connecting pipe (103) of the compressor (100);
under the condition that a pipeline between a second port of a condenser in the outdoor heat exchanger (200) and the indoor heat exchanger (300) and an inlet of the liquid storage tank (500) is communicated, and a pipeline between a second port of the throttling unit and an air pressure balance port of the liquid storage tank (500) is communicated, the temperature regulating system works in the refrigerant storage mode;
and under the condition that a pipeline between a first port of a condenser in the outdoor heat exchanger (200) and the indoor heat exchanger (300) and an inlet of the liquid storage tank (500) is communicated and a pipeline between a second port of the throttling unit and an air pressure balance port of the liquid storage tank (500) is closed, the temperature regulating system works in the cooling execution mode.
3. The control device of the air conditioning system as claimed in claim 2, wherein the inlet of the liquid storage tank (500) and the air pressure balancing port of the liquid storage tank (500) are both located at the top of the liquid storage tank (500); the outlet of the liquid storage tank (500) is positioned at the bottom of the liquid storage tank (500); in the vertical position, the height of the bottom of the liquid storage tank (500) is higher than that of a high-pressure cavity connecting pipe (103) of the compressor (100).
4. The control device of an air conditioning system according to claim 2, wherein the temperature adjustment system further comprises: a switching unit and a switching unit; wherein the content of the first and second substances,
the switching unit is provided with a first inlet, a second inlet and an outlet;
a first port of a condenser in the outdoor heat exchanger (200) and the indoor heat exchanger (300) is communicated to a first inlet of the switching unit; a second port of a condenser in the outdoor heat exchanger (200) and the indoor heat exchanger (300) is communicated to a second inlet of the switching unit; the outlet of the switching unit is communicated to the inlet of the liquid storage tank (500); the second port of the throttling unit is communicated to the air pressure balancing port of the liquid storage tank (500) after passing through the switch unit;
under the conditions that a pipeline between a second inlet of the switching unit and an outlet of the switching unit is connected and the switch unit is closed, the temperature regulating system works in the refrigerant storage mode;
and under the condition that a pipeline between the second inlet of the switching unit and the outlet of the switching unit is connected and the switch unit is opened, the temperature regulating system works in the refrigerant storage mode.
5. The control device of an air conditioning system according to claim 4, wherein the switching unit includes: a three-way reversing valve; the switching unit includes: an electromagnetic valve (503).
6. The control device of an air conditioning system according to claim 2, wherein the temperature adjustment system further comprises: a first unidirectional unit and a second unidirectional unit; wherein the content of the first and second substances,
the first one-way unit is arranged between the outlet of the switching unit and the inlet of the liquid storage tank (500);
the second one-way unit is arranged between the outlet of the liquid storage tank (500) and the high-pressure cavity connecting pipe (103) of the compressor (100).
7. The control device of an air conditioning system according to any one of claims 4 to 6, wherein the heat exchange system further comprises: a four-way valve (600); the first valve port of the four-way valve (600) is communicated to the first port of the outdoor heat exchanger (200); the second valve port of the four-way valve (600) is communicated to the suction port (101) of the compressor (100); the third valve port of the four-way valve (600) is communicated to the first port of the indoor heat exchanger (300); the fourth valve port of the four-way valve (600) is communicated to the exhaust port (102) of the compressor (100);
under the condition that the air conditioning system can work in a cooling mode and a heating mode in a switching way by reversing the four-way valve (600), the number of the switching units is two; in the two sets of switching units, the first set of switching unit is arranged between the outdoor heat exchanger (200) and the inlet of the liquid storage tank (500), and the second set of switching unit is arranged between the indoor heat exchanger (300) and the inlet of the liquid storage tank (500);
correspondingly, under the condition that the temperature regulating system further comprises two sets of first one-way units; under the condition of two sets of the first one-way units, the first set of the first one-way units is arranged between the outlet of the first set of the switching unit and the inlet of the liquid storage tank (500); the second set of the first unidirectional unit is arranged between the outlet of the second set of the switching unit and the inlet of the liquid storage tank (500).
8. The control device of an air conditioning system according to claim 2, further comprising: a liquid level detection unit;
the liquid level detection unit is configured to acquire the liquid level of liquid refrigerant in the liquid storage tank (500);
the control unit is further configured to determine whether the liquid level of the liquid refrigerant in the liquid storage tank (500) is lower than a set minimum liquid level threshold value after controlling the temperature adjusting system to work in the cooling execution mode;
if the liquid level of the liquid refrigerant in the liquid storage tank (500) is not lower than the set lowest liquid level threshold value, returning to continuously determine whether the exhaust temperature of the compressor (100) is higher than a preset value;
if the exhaust temperature of the compressor (100) is not higher than the preset value or if the liquid level of the liquid refrigerant in the liquid storage tank (500) is lower than a set minimum liquid level threshold value, the cooling execution mode is controlled to be closed, and the refrigerant storage mode is controlled to be opened.
9. The control device of an air conditioning system according to claim 8, further comprising:
the control unit is further configured to determine whether the liquid level of liquid refrigerant in the liquid storage tank (500) is higher than a set maximum liquid level threshold value after controlling the cooling execution mode to be turned off;
if the liquid level of the liquid refrigerant in the liquid storage tank (500) is higher than a set maximum liquid level threshold value, controlling the storage mode of the refrigerant to be closed, and returning to continuously determine whether the exhaust temperature of the compressor (100) is higher than a preset value;
if the liquid level of the liquid refrigerant in the liquid storage tank (500) is not higher than the set maximum liquid level threshold value, the refrigerant storage mode is continuously controlled, and whether the liquid level of the liquid refrigerant in the liquid storage tank (500) is higher than the set maximum liquid level threshold value or not is continuously determined.
10. An air conditioning system, comprising: the control device of an air conditioning system as claimed in any one of claims 1 to 9.
11. A control method of an air conditioning system according to claim 10, comprising:
under the condition that the heat exchange system is in refrigerating or heating operation, controlling the temperature regulating system to work in the refrigerant storage mode;
acquiring a discharge temperature of the compressor (100);
determining whether a discharge temperature of the compressor (100) is higher than a preset value; and the number of the first and second groups,
and if the exhaust temperature of the compressor (100) is higher than the preset value, controlling the temperature adjusting system to work in the cooling execution mode.
12. The control method of an air conditioning system according to claim 11, further comprising:
acquiring the liquid level of a liquid refrigerant in the liquid storage tank (500);
after the temperature adjusting system is controlled to work in the cooling execution mode, whether the liquid level of liquid refrigerant in the liquid storage tank (500) is lower than a set lowest liquid level threshold value or not is determined;
if the liquid level of the liquid refrigerant in the liquid storage tank (500) is not lower than the set lowest liquid level threshold value, returning to continuously determine whether the exhaust temperature of the compressor (100) is higher than a preset value;
if the exhaust temperature of the compressor (100) is not higher than the preset value or if the liquid level of the liquid refrigerant in the liquid storage tank (500) is lower than a set minimum liquid level threshold value, the cooling execution mode is controlled to be closed, and the refrigerant storage mode is controlled to be opened.
13. The control method of an air conditioning system according to claim 12, further comprising:
after the cooling execution mode is controlled to be closed, whether the liquid level of liquid refrigerant in the liquid storage tank (500) is higher than a set maximum liquid level threshold value or not is determined;
if the liquid level of the liquid refrigerant in the liquid storage tank (500) is higher than a set maximum liquid level threshold value, controlling the refrigerant storage mode to be closed, and returning to continuously determine whether the exhaust temperature of the compressor (100) is higher than a preset value;
if the liquid level of the liquid refrigerant in the liquid storage tank (500) is not higher than the set maximum liquid level threshold value, the refrigerant storage mode is continuously controlled, and whether the liquid level of the liquid refrigerant in the liquid storage tank (500) is higher than the set maximum liquid level threshold value or not is continuously determined.
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