CN115234976B - Air conditioning system, control method and air conditioner - Google Patents

Air conditioning system, control method and air conditioner Download PDF

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Publication number
CN115234976B
CN115234976B CN202211169279.7A CN202211169279A CN115234976B CN 115234976 B CN115234976 B CN 115234976B CN 202211169279 A CN202211169279 A CN 202211169279A CN 115234976 B CN115234976 B CN 115234976B
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Prior art keywords
heat exchanger
air conditioning
conditioning system
heat
compressor
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CN115234976A (en
Inventor
古汤汤
卓森庆
陈伟
刘合心
陈华
陈光明
郝新月
高能
寇晖
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Ningbo Aux Electric Co Ltd
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Ningbo Aux Electric Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46—Improving electric energy efficiency or saving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/85—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 variable-flow pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
    • F24F2005/0064—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground using solar energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/10—Pressure
    • F24F2140/12—Heat-exchange fluid pressure

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

Abstract

The invention provides an air conditioning system, a control method and an air conditioner, wherein the air conditioning system comprises: an auxiliary heat exchange device; the air conditioner external unit is connected with the auxiliary heat exchange device; the air conditioner indoor unit, the second compressor, the second heat exchanger and the auxiliary heat exchange device are sequentially connected to form a second refrigerant circulation pipeline; the air conditioner device is provided with a first refrigerant connecting pipeline, one end of the first refrigerant connecting pipeline is communicated between the first compressor and the first heat exchanger, and the other end of the first refrigerant connecting pipeline is communicated between the second compressor and the second heat exchanger. The invention solves the technical problems that the multi-split air conditioner has large load demand and the air conditioner cannot reasonably allocate the opening and closing of each device and meet the load demand, and realizes the technical effects of reasonably allocating the opening and closing of the devices in the air conditioner and meeting the load demand of the air conditioner.

Description

Air conditioning system, control method and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner system, a control method and an air conditioner.
Background
With the development of society, the energy demand increases, the energy safety problem gradually becomes prominent, and the innovation and energy conservation of air-conditioning products are put forward to a very important place.
However, in the actual use of the air conditioner, there is a problem in that: one outdoor unit of the multi-split air conditioner can be matched with dozens of indoor units, the load requirements are greatly different when one indoor unit and the indoor units are fully opened due to the difference of load sides, and even if the air conditioner is provided with devices such as solar energy, the equipment cannot be reasonably adjusted to run sometimes, so that the load requirements of the air conditioner cannot be met.
Disclosure of Invention
The invention solves the technical problems that the multi-split air conditioner has large load demand and the air conditioner cannot be matched to meet the load demand.
To solve the above problems, the present invention provides an air conditioning system comprising: an auxiliary heat exchange device; the air conditioning device comprises an air conditioning outer machine and at least one air conditioning inner machine, and the air conditioning outer machine is connected with the auxiliary heat exchange device; the outer machine of air conditioner includes: the heat exchanger comprises a first compressor, a second compressor, a first heat exchanger and a second heat exchanger; the air conditioner indoor unit, the first compressor and the first heat exchanger are sequentially connected to form a first refrigerant circulation pipeline, and the air conditioner indoor unit, the second compressor, the second heat exchanger and the auxiliary heat exchange device are sequentially connected to form a second refrigerant circulation pipeline; the air conditioner device is provided with a first refrigerant connecting pipeline, one end of the first refrigerant connecting pipeline is communicated between the first compressor and the first heat exchanger, and the other end of the first refrigerant connecting pipeline is communicated between the second compressor and the second heat exchanger, so that the first compressor can be communicated with the second heat exchanger through the first refrigerant connecting pipeline and can circulate with the auxiliary heat exchange device.
Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the air conditioner external unit is provided with two compressors and a refrigerant circulating pipeline corresponding to each compressor, so that compared with an air conditioning system with only one compressor, the air conditioning system can better meet the load and temperature regulation requirements of the whole system. In addition, an auxiliary heat exchange device is connected in the second refrigerant circulating pipeline, and the auxiliary heat exchange device can dissipate heat of the refrigerant in the air conditioning device, so that the energy conservation of the whole air conditioning system is facilitated. On the other hand, only the second refrigerant circulating pipeline where the second heat exchanger and the second compressor are located can be connected with the auxiliary heat exchange device to exchange heat, so that the refrigerant passing through the first compressor can exchange heat through the auxiliary heat exchange device, a first refrigerant connecting pipeline is arranged between the first compressor and the second compressor and can communicate the first refrigerant circulating pipeline and the second refrigerant circulating pipeline, and therefore heat exchange of the refrigerant in the air conditioning device can be achieved through the auxiliary heat exchange device, the energy-saving effect of the whole air conditioning system is improved, and the air conditioning load requirements under various conditions are met.
In one example of the present invention, the auxiliary heat exchange means comprises: the air conditioner comprises an injection type refrigeration unit, a heat exchanger and a control unit, wherein the injection type refrigeration unit comprises a refrigeration heat exchanger; the injection type refrigeration unit exchanges heat with the solar heat collection unit through the heat collection heat exchanger.
Compared with the prior art, the technical scheme has the following technical effects: the solar heat collection unit can be connected with the jet type refrigeration unit firstly, and is connected with the jet type refrigeration unit through the heat collection heat exchanger for heat exchange, the refrigeration heat exchanger on the jet type refrigeration unit is connected with the air conditioning device for heat exchange, and finally the heat exchange of the auxiliary heat exchange device for the air conditioning device is realized. The solar energy heat collection unit and the jet type refrigeration unit are connected to form an auxiliary heat exchange device which can perform heat exchange and energy collection, and the auxiliary heat exchange device and the jet type refrigeration unit are matched to achieve high energy-saving efficiency.
In one example of the present invention, the ejector refrigeration unit further comprises: an ejector, a third heat exchanger; the refrigeration heat exchanger, the ejector and the third heat exchanger are sequentially connected to form a third refrigerant circulation pipeline, one end of the refrigeration heat exchanger is communicated with the first inlet of the ejector, the outlet of the ejector is communicated with the third heat exchanger, and the other end of the third heat exchanger is communicated with the other end of the refrigeration heat exchanger; the ejector is connected with the third heat exchanger to form a fourth refrigerant circulation pipeline, after an outlet of the ejector is connected with one end of the third heat exchanger, the other end of the third heat exchanger is communicated with a second inlet of the ejector to form the fourth refrigerant circulation pipeline, and the fourth refrigerant circulation pipeline exchanges heat with the solar heat collecting unit.
Compared with the prior art, the technical scheme has the following technical effects: the refrigeration heat exchanger is connected with the ejector and the third heat exchanger to form a circulating pipeline on one hand, and is connected with the air conditioning device to form a heat exchange pipeline on the other hand, so that heat exchange between the injection type refrigeration unit and the air conditioning device can be realized through connection of components. And the refrigerant in the fourth refrigerant circulating pipeline realizes heat exchange between the jet type refrigeration unit and the solar heat collection unit through the heat collection heat exchanger.
In one example of the present invention, the solar heat collecting unit further comprises: a solar heat collector; one end of the solar heat collector is communicated with the inlet of the heat collection heat exchanger, the other end of the solar heat collector is communicated with the outlet of the heat collection heat exchanger, and the solar heat collector is communicated with the heat collection heat exchanger to form a fifth refrigerant circulating pipeline.
Compared with the prior art, the technical scheme has the following technical effects: the structure of the specific solar heat collecting unit is provided with a solar heat collector, the solar heat collector is used for collecting solar energy and converting the solar energy into heat energy, the solar heat collector is used for acquiring external natural energy and providing external energy for an air conditioning system, and the energy is transmitted to the jet type refrigerating unit through the solar heat collecting unit and is further applied to the operation of the air conditioning device.
In one example of the present invention, the air conditioning system further includes: one end of the second refrigerant connecting pipeline is communicated with a second inlet of the ejector, and the other end of the second refrigerant connecting pipeline is communicated to a pipeline between the second heat exchanger and the refrigeration heat exchanger; and one end of the third refrigerant connecting pipeline is connected to a pipeline between the air conditioner indoor unit and the refrigeration heat exchanger, and the other end of the third refrigerant connecting pipeline is connected to a pipeline communicated between the third heat exchanger and the refrigeration heat exchanger.
Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the auxiliary heat exchange device is communicated with the air conditioning device through the refrigeration heat exchanger, and a second refrigerant connecting pipeline and a third refrigerant connecting pipeline are further arranged between the auxiliary heat exchange device and the air conditioning device. The ejector is communicated with the second heat exchanger through a specific second refrigerant connecting pipeline, one end of the third refrigerant connecting pipeline is connected with the third heat exchanger, and the other end of the third refrigerant connecting pipeline is connected between the refrigeration heat exchanger and the air conditioner indoor unit. The second refrigerant connecting pipeline and the third refrigerant connecting pipeline are used for a heating mode of the air conditioning system, and are convenient to circulate from the solar heat collecting unit to the air conditioning device directly without passing through the third heat exchanger and the ejector under the heating mode.
In one example of the present invention, the air conditioning system further includes: the circulating pump is arranged between the heat collection heat exchanger and the solar heat collector; the working medium pump is arranged between the heat collection heat exchanger and the third heat exchanger; the injection system electronic expansion valve is arranged between the third heat exchanger and the refrigeration heat exchanger; the first expansion valve is arranged between the first heat exchanger and the air conditioner indoor unit; the second expansion valve is arranged between the refrigeration heat exchanger and the air conditioner indoor unit; the first electromagnetic valve is arranged on the second refrigerant connecting pipeline; the second electromagnetic valve is arranged on the third refrigerant connecting pipeline; and the third electromagnetic valve is arranged between the heat collection heat exchanger and the ejector.
Compared with the prior art, the technical scheme has the following technical effects: the circulating pump provides power for the refrigerant circulation in the solar heat collection unit, and can play a role in accelerating the circulating speed or slowing down the circulating speed. Similarly, the working medium pump is arranged in the jet type refrigeration unit and plays a role in controlling the flow circulation speed of the refrigerant in the unit. The injection system electronic expansion valve, the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve control the opening and closing of corresponding pipelines in the air conditioning system. The first expansion valve and the second expansion valve are control valves for adjusting the pressure in the refrigerant circulation pipeline in the air conditioner external unit.
In another aspect, the present disclosure further provides a control method of an air conditioning system, where the control method is implemented by using the air conditioning system in the above embodiment, and the control method includes: judging the operation load requirement of the air conditioning system; and controlling the air conditioning system to switch the operation equipment according to the operation load requirement.
Compared with the prior art, the technical scheme has the following technical effects: the method for acquiring and judging the load demand is a method for accurately acquiring the state of the air conditioning system, the load demand is the most direct condition capable of determining the opening and closing of internal components of the air conditioning system, and the opening and closing of internal equipment of the air conditioning system can be controlled more accurately and scientifically according to the operation load demand. The load is constantly changed when the air conditioning system operates normally, corresponding running equipment needs to be automatically switched according to the change of the load, and the equipment keeps the optimal energy-saving state. Whether to switch the air conditioning system operation equipment and how to switch the air conditioning system operation equipment need to be adjusted according to the operation load requirement of the air conditioning system, which is the inventive concept of the scheme, so that the operation load requirement of the air conditioning system needs to be judged firstly, and then the operation equipment needs to be switched. The method has the advantages that the components in the air conditioning system can be adjusted in time according to the load requirement of the air conditioning system, and energy conservation is facilitated.
In an embodiment of the present invention, determining an operation load requirement of an air conditioning system specifically includes: detecting the corresponding pressure of the air conditioning system according to the operation mode to obtain a detected pressure value; comparing the detected pressure value with a set pressure threshold value to obtain the operating load requirement of the air conditioning system; the detection pressure value of the air conditioning system in the refrigeration mode is a first detection pressure value, and the detection pressure value of the air conditioning system in the heating mode is a second detection pressure value; when the first detection pressure value is smaller than and/or equal to the first set pressure threshold value, the operation load requirement of the air conditioning system is a first operation load requirement; when the first detection pressure value is larger than a second set pressure threshold value, the operation load requirement of the air conditioning system is a second operation load requirement; when the first detection pressure value is larger than a third set pressure threshold value, the operation load requirement of the air conditioning system is a third operation load requirement; when the second detected pressure value is greater than the fourth set pressure threshold value, the operating load requirement of the air conditioning system is a fourth operating load requirement; when the second detected pressure value is smaller than and/or equal to a fifth set pressure threshold value, the operation load demand of the air conditioning system is a fifth operation load demand; and when the second detected pressure value is smaller than and/or equal to the sixth set pressure threshold value, the operation load demand of the air conditioning system is the sixth operation load demand.
Compared with the prior art, the technical scheme has the following technical effects: the operating load requirement of the air conditioning system can be judged through the condensing pressure of the air conditioning system, and the pressure value in the air conditioning system is preferably selected to be judged. And the air conditioning system has different operating pressures in the cooling mode and the heating mode, and corresponding pressure values are detected according to different operating modes and are compared with corresponding set threshold values. The pressure value detected in each mode is provided with three comparison threshold values, the three comparison threshold values are arranged at least, small load requirements, general load requirements and large load requirements are divided, the division range according to the threshold values is clear and reasonable, and the control method is more reasonable.
In an embodiment of the present invention, according to an operation load requirement, an air conditioning system switching operation device specifically includes: when the operating load requirement of the air conditioning system is a first operating load requirement, starting a first compressor and continuing to refrigerate; when the operating load requirement of the air conditioning system is a second operating load requirement, starting the auxiliary heat exchange device and the second compressor and continuing to refrigerate; when the operating load requirement of the air conditioning system is a third operating load requirement, starting the auxiliary heat exchange device, the first compressor and the second compressor and continuing to refrigerate; when the operation load requirement of the air conditioning system is a fourth operation load requirement, starting the first compressor and continuing heating; when the operation load requirement of the air conditioning system is a fifth operation load requirement, starting the auxiliary heat exchange device and the first compressor and continuing heating; and when the operation load requirement of the air conditioning system is a sixth operation load requirement, starting the auxiliary heat exchange device, the first compressor and the second compressor and continuing heating.
Compared with the prior art, the technical scheme has the following technical effects: in the heating mode or the cooling mode, when the load demand is small, only one compressor is started to operate; when the load requirement is general, the auxiliary heat exchange device and a compressor are started to operate; and when the load demand is larger, the auxiliary heat exchange device and the two compressors are started to operate. Different load requirements correspond to corresponding running equipment to start running, and the energy-saving performance is better.
In still another aspect, an air conditioner includes: an air conditioning system as in any one of the above embodiments; alternatively, the air conditioner is provided with a processor, a memory, and a program or instructions stored on the memory and executable on the processor, which when executed by the processor implements the control method of the air conditioning system as in any one of the above embodiments.
Compared with the prior art, the technical scheme has the following technical effects: the air conditioner with the air conditioning system can reasonably adjust running equipment and meet the load requirement of the air conditioner.
After the technical scheme of the invention is adopted, the following technical effects can be achieved:
(1) Compared with the existing air conditioning system with the auxiliary heat exchange device, the air conditioning system is provided with the two compressors, when one compressor and the auxiliary heat exchange device are both started and play a role in energy conservation, the load requirement of the air conditioning system can still not be met, and the second compressor can be started to meet the load requirement;
(2) The load is constantly changed when the air conditioning system operates normally, corresponding running equipment needs to be automatically switched according to the change of the load, and the equipment keeps the optimal energy-saving state. Whether to switch the air conditioner operation equipment and how to switch the air conditioner operation equipment are required to be adjusted according to the operation load requirement of the air conditioning system, which is the corresponding invention concept of the control method of the scheme, so that the method has the advantages that the components in the air conditioning system can be adjusted in time according to the load requirement of the air conditioning system, and the energy conservation is facilitated;
(3) In the heating mode or the cooling mode, when the load demand is small, only one compressor is started to operate; when the load requirement is general, the auxiliary heat exchange device and a compressor are started to operate; and when the load demand is larger, the auxiliary heat exchange device and the two compressors are started to operate. Different load requirements correspond to corresponding running equipment to start running, and the energy-saving performance is better.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts;
FIG. 1 is a schematic structural diagram of an air conditioning system according to the present invention;
FIG. 2 is a schematic view of an air conditioning system at a first operating load demand;
FIG. 3 is a schematic view of an air conditioning system at a second operating load demand;
FIG. 4 is a schematic view of an air conditioning system at a third operating load demand;
FIG. 5 is a schematic view of an air conditioning system at a fourth operating load demand;
FIG. 6 is a schematic view of an air conditioning system at a fifth operating load demand;
FIG. 7 is a schematic view of an air conditioning system at a sixth operating load demand;
FIG. 8 is a flow chart illustrating the steps of a control method provided by the present invention;
FIG. 9 is a block diagram of an air conditioner according to the present invention;
description of the reference numerals:
1-an air conditioning system; 2-auxiliary heat exchange device; 3-an air conditioner; 4-a processor; 5-a memory; 10-a solar energy collection unit; 110-a solar collector; 120-a heat collecting heat exchanger; 130-circulation pump; 20-a jet refrigeration unit; 210-an ejector; 211 — a first inlet; 212-a second inlet; 220-a third heat exchanger; 230-a refrigeration heat exchanger; 240-working medium pump; 250-injection system electronic expansion valve; 260-third electromagnetic valve; 30-an air conditioning device; 310-air conditioner indoor unit; 320-an air conditioner external unit; 321-a first compressor; 322-a second compressor; 323-a first heat exchanger; 324-a second heat exchanger; 330-first refrigerant connecting pipeline; 341-first expansion valve; 342-a second expansion valve; 40-a second refrigerant connecting pipeline; 41-a first solenoid valve; 50-a third refrigerant connecting pipeline; 51-second solenoid valve.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The first embodiment is as follows:
in a particular embodiment, referring to fig. 1, an air conditioning system 1 comprises: an auxiliary heat exchange device 2; the air conditioning device 30 comprises an air conditioning outer unit 320 and at least one air conditioning inner unit 310, wherein the air conditioning outer unit 320 is connected with the auxiliary heat exchange device 2; the outdoor air conditioner 320 includes: a first compressor 321, a second compressor 322, a first heat exchanger 323, a second heat exchanger 324; the at least one air conditioner indoor unit 310, the first compressor 321 and the first heat exchanger 323 are sequentially connected to form a first refrigerant circulation pipeline, and the at least one air conditioner indoor unit 310, the second compressor 322, the second heat exchanger 324 and the auxiliary heat exchange device 2 are sequentially connected to form a second refrigerant circulation pipeline; the air conditioner 30 has a first refrigerant connecting pipeline 330, one end of the first refrigerant connecting pipeline 330 is connected to a position between the first compressor 321 and the first heat exchanger 323, and the other end of the first refrigerant connecting pipeline 330 is connected to a position between the second compressor 322 and the second heat exchanger 324, so that the first compressor 321 can be communicated with the second heat exchanger 324 through the first refrigerant connecting pipeline 330 and can circulate with the auxiliary heat exchanging device 2.
In the present embodiment, the air conditioning system 1 has an air conditioning device 30 and an auxiliary heat exchanging device 2. The air conditioning device 30 is used for temperature regulation and comprises at least one air conditioner indoor unit 310, wherein the at least one air conditioner indoor unit 310 is arranged indoors and is connected in parallel and used for regulating the indoor temperature; the air conditioner 30 further includes an outdoor air conditioner 320, and the outdoor air conditioner 320 is disposed outdoors and connected to at least one indoor air conditioner 310 connected in parallel.
Further, the auxiliary heat exchanger 2 is connected to an air conditioner external unit 320 in the air conditioner 30, and performs heat exchange with the air conditioner external unit 320, thereby saving energy. The auxiliary heat exchange device 2 can help the air conditioner external unit 320 to dissipate heat or collect heat, thereby realizing heat exchange.
Further, in the air conditioner 30, the air conditioner external unit 320 is provided with two refrigerant circulation lines to communicate with the air conditioner internal unit 310 and circulate the refrigerant. The air conditioner external unit 320 is provided with a first compressor 321, a first heat exchanger 323, a second compressor 322 and a second heat exchanger 324, wherein the first compressor 321 is connected with the first heat exchanger 323 and then communicated with at least one air conditioner internal unit 310 to form a first refrigerant circulation pipeline; the second compressor 322 is connected to the second heat exchanger 324 and then communicated with at least one air conditioner indoor unit 310 to form a second refrigerant circulation pipeline.
Further, in the second refrigerant circulation pipeline, the second compressor 322 is connected to the second heat exchanger 324, then connected to the auxiliary heat exchange device 2, and finally communicated with the at least one air conditioner indoor unit 310, so as to finally form the second refrigerant circulation pipeline. By setting the second refrigerant circulation pipeline to be communicated with the auxiliary heat exchange device 2, the refrigerant circulating in the air conditioner 30 can be cooled after passing through the auxiliary heat exchange device 2.
Further, the air conditioner 30 is further provided with a first refrigerant connecting pipeline 330, and the first refrigerant connecting pipeline 330 communicates the first compressor 321 with the second heat exchanger 324, so that the refrigerant in the first refrigerant circulating pipeline can enter the second refrigerant circulating pipeline through the first refrigerant connecting pipeline 330, and the refrigerant can exchange heat through the second heat exchanger 324 and the auxiliary heat exchange device 2.
In the embodiment, the air conditioner external unit 320 is provided with two compressors and a refrigerant circulation pipeline corresponding to each compressor, so that the air conditioner system 1 in the present application can better meet the load and temperature regulation requirements of the whole system compared to an air conditioner system with only one compressor. In addition, an auxiliary heat exchange device 2 is connected in the second refrigerant circulation pipeline, and the auxiliary heat exchange device 2 can dissipate heat of the refrigerant in the air conditioning device 30, so that the energy conservation of the whole air conditioning system 1 is facilitated. On the other hand, only the second refrigerant circulation pipeline where the second heat exchanger 324 and the second compressor 322 are located can be connected with the auxiliary heat exchange device 2 to exchange heat, so that the refrigerant passing through the first compressor 321 can also exchange heat through the auxiliary heat exchange device 2, the first refrigerant connection pipeline 330 is arranged between the first compressor 321 and the second compressor 322, and the first refrigerant connection pipeline 330 can communicate the first refrigerant circulation pipeline with the second refrigerant circulation pipeline, so that the refrigerant in the air conditioning device 30 can exchange heat through the auxiliary heat exchange device 2, the energy saving effect of the whole air conditioning system 1 is improved, and the air conditioning load requirements under various conditions are met.
In a specific embodiment, the auxiliary heat exchange device 2 comprises: the injection type refrigeration unit 20, the injection type refrigeration unit 20 includes the refrigeration heat exchanger 230, the air conditioner 30 exchanges heat with the injection type refrigeration unit 20 through the refrigeration heat exchanger 230; the solar energy heat collection unit 10, the solar energy heat collection unit 10 includes the heat collection heat exchanger 120, the jet refrigeration unit 20 exchanges heat with the solar energy heat collection unit 10 through the heat collection heat exchanger 120.
In the present embodiment, the auxiliary heat exchange device 2 includes two heat exchange units, one is the injection type refrigeration unit 20, and the other is the solar heat collection unit 10.
The ejector refrigeration unit 20 is a refrigeration unit that uses thermal energy and converts the thermal energy into power, and mainly functions to perform heat exchange for refrigeration, and the ejector refrigeration unit 20 is connected to the air conditioning device 30 through a refrigeration heat exchanger 230 provided in the unit.
The solar heat collecting unit 10 can convert solar energy into heat energy, the solar heat collecting unit 10 is connected with the injection type refrigeration unit 20 through the heat collecting heat exchanger 120, heat energy can be provided for the injection type refrigeration unit 20, and the solar heat collecting unit 10 absorbs solar energy, so that the solar energy-saving and environment-friendly effects are achieved.
In this embodiment, the solar heat collecting unit 10 can be connected to the injection type refrigeration unit 20 first, and is connected to the injection type refrigeration unit 20 through the heat collecting heat exchanger 120 to perform heat exchange, and the refrigeration heat exchanger 230 on the injection type refrigeration unit 20 is connected to the air conditioning device 30 to perform heat exchange, so as to finally realize the heat exchange of the auxiliary heat exchanging device 2 to the air conditioning device 30. The arrangement of the heat exchange device has the energy-saving effect on the whole air conditioning system 1, the auxiliary heat exchange device 2 formed by connecting the solar heat collection unit 10 and the jet type refrigeration unit 20 can perform the heat exchange and energy collection effects, and the energy-saving efficiency of the cooperation of the solar heat collection unit and the jet type refrigeration unit is high.
In a particular embodiment, the ejector refrigeration unit 20 further comprises: an ejector 210, a third heat exchanger 220; the refrigeration heat exchanger 230, the ejector 210 and the third heat exchanger 220 are sequentially connected to form a third refrigerant circulation pipeline, one end of the refrigeration heat exchanger 230 is communicated with the first inlet 211 of the ejector 210, the outlet of the ejector 210 is communicated with the third heat exchanger 220, and the other end of the third heat exchanger 220 is communicated with the other end of the refrigeration heat exchanger 230; the ejector 210 is connected with the third heat exchanger 220 to form a fourth refrigerant circulation pipeline, after an outlet of the ejector 210 is connected with one end of the third heat exchanger 220, the other end of the third heat exchanger 220 is communicated with the second inlet 212 of the ejector 210 to form the fourth refrigerant circulation pipeline, and the fourth refrigerant circulation pipeline exchanges heat with the solar heat collection unit 10.
In the present embodiment, two refrigerant circulation pipelines, a third refrigerant circulation pipeline and a fourth refrigerant circulation pipeline are further disposed in the ejector refrigeration unit 20, and the refrigerants circulate and communicate in the two refrigerant circulation pipelines.
Further, in the third refrigerant circulation line, the refrigeration heat exchanger 230, the ejector 210, and the third heat exchanger 220 are sequentially connected to form the entire third refrigerant circulation line. In the fourth refrigerant circulation line, only the ejector 210 and the third heat exchanger 220 are connected to form the refrigerant circulation line.
The ejector 210 has two inlets, a first inlet 211 and a second inlet 212, the refrigerant in the third refrigerant circulation pipeline enters the ejector 210 through the first inlet 211, enters the third heat exchanger 220 from the outlet of the ejector 210, passes through the third heat exchanger 220, enters the refrigeration heat exchanger 230, and finally returns to the first inlet 211; the refrigerant in the fourth refrigerant circulation line enters the ejector 210 through the second inlet 212, enters the third heat exchanger 220 from the outlet of the ejector 210, passes through the third heat exchanger 220, and returns to the second inlet 212 again. In a fourth refrigerant circulation pipeline formed by the ejector 210 and the third heat exchanger 220, a pipeline between the third heat exchanger 220 and the second inlet 212 is communicated with the heat collecting heat exchanger 120, so that heat exchange between the ejector refrigeration unit 20 and the solar heat collecting unit 10 is realized.
In this embodiment, the cooling heat exchanger 230 is connected to the ejector 210 and the third heat exchanger 220 to form a circulation line, and is connected to the air conditioner 30 to form a heat exchange line, so that heat exchange between the ejector cooling unit 20 and the air conditioner 30 can be realized through connection of the components. The refrigerant in the fourth refrigerant circulation line realizes heat exchange between the jet refrigeration unit 20 and the solar heat collection unit 10 through the heat collection heat exchanger 120.
In a particular embodiment, the solar energy collection unit 10 further comprises: a solar collector 110; one end of the solar heat collector 110 is communicated with an inlet of the heat collecting heat exchanger 120, the other end of the solar heat collector 110 is communicated with an outlet of the heat collecting heat exchanger 120, and the solar heat collector 110 is communicated with the heat collecting heat exchanger 120 to form a fifth refrigerant circulating pipeline.
In this embodiment, in the solar heat collecting unit 10, the solar heat collector 110 and the heat collecting heat exchanger 120 are mainly connected to each other to form a fifth refrigerant circulation pipeline, the two solar heat collector 110 and the heat collecting heat exchanger 120 are connected end to end, the solar heat collector 110 is used for absorbing solar energy and converting the solar energy into heat energy, and the refrigerant or water circulates into the heat collecting heat exchanger 120 to provide heat energy for the refrigerant in the fourth refrigerant circulation pipeline in the jet refrigeration unit 20.
In this embodiment, the solar heat collecting unit 10 is specifically configured with a solar heat collector 110, the solar heat collector 110 is used for collecting solar energy and converting the solar energy into heat energy, the solar heat collector 110 is used for obtaining external natural energy to provide external energy for the air conditioning system 1, and the energy is transmitted to the jet type refrigeration unit 20 through the solar heat collecting unit 10 to further apply the energy to the operation of the air conditioning device 30.
In a specific embodiment, the air conditioning system 1 further comprises: a second refrigerant connecting pipeline 40, one end of the second refrigerant connecting pipeline 40 is communicated with the second inlet 212 of the ejector 210, and the other end is communicated to a pipeline between the second heat exchanger 324 and the refrigeration heat exchanger 230; one end of the third refrigerant connecting pipeline 50 is connected to a pipeline between the air conditioner indoor unit 310 and the refrigeration heat exchanger 230, and the other end of the third refrigerant connecting pipeline 50 is connected to a pipeline communicated between the third heat exchanger 220 and the refrigeration heat exchanger 230.
In this embodiment, under the heating condition of the air conditioning system 1, the refrigerant does not enter the internal unit through the heat exchanger first, but enters the internal unit through the compressor first, and then enters the compressor through the heat exchanger, so that the refrigerant circulates. In this way, when the auxiliary heat exchange device 2 is used for saving energy in a heating situation, the second refrigerant connection pipeline 40 and the third refrigerant connection pipeline 50 need to be arranged to meet the refrigerant circulation of the air conditioning system 1 in the heating mode due to the change of the circulation flow direction of the refrigerant.
Further, in the heating mode, the refrigerant flows out of the air conditioner indoor unit 310, and the air conditioner device 30 and the auxiliary heat exchanger 2 need to be connected through the third refrigerant connecting pipeline 50, and specifically connected between the third heat exchanger 220 and the refrigeration heat exchanger 230, so that the refrigerant can directly enter the fourth refrigerant circulating pipeline through the third refrigerant connecting pipeline 50. After entering the fourth refrigerant circulation line, the refrigerant directly exchanges heat with the solar heat collecting unit 10 through the heat collecting heat exchanger 120 without passing through the ejector 210 and other components. Finally, when the refrigerant circulates back to the air conditioning device 30, one end of the second refrigerant connecting pipeline 40 is communicated with the second inlet 212 of the ejector 210 through the second refrigerant connecting pipeline 40, but the second inlet 212 is closed at this time, the refrigerant directly enters the second refrigerant connecting pipeline 40 from the heat collecting heat exchanger 120, and is connected with the second heat exchanger 324 through the second refrigerant connecting pipeline 40, so that the refrigerant flows into the second heat exchanger 324 and enters the compressor through the second heat exchanger 324, and a complete refrigerant circulation is realized.
Since the ejector refrigeration unit 20 performs a cooling function, when the air conditioning system 1 heats, the refrigerant needs to absorb heat, and does not circulate through the third refrigerant circulation line formed by the ejector 210, the third heat exchanger 220, and the cooling heat exchanger 230.
In this embodiment, the auxiliary heat exchanger 2 and the air conditioner 30 are not only communicated with each other through the refrigeration heat exchanger 230, but also the second refrigerant connecting pipeline 40 and the third refrigerant connecting pipeline 50 are provided between the auxiliary heat exchanger 2 and the air conditioner 30. Specifically, the second refrigerant connection pipeline 40 connects the ejector 210 with the second heat exchanger 324, and one end of the third refrigerant connection pipeline 50 is connected with the third heat exchanger 220, and the other end is connected between the refrigeration heat exchanger 230 and the air conditioner indoor unit 310. The second refrigerant connection pipeline 40 and the third refrigerant connection pipeline 50 are used in a heating mode of the air conditioning system 1, so that the refrigerant is directly circulated from the solar heat collecting unit 10 to the air conditioning device 30 without passing through the third heat exchanger 220 and the ejector 210 in the heating mode.
In a specific embodiment, the air conditioning system 1 further comprises: the circulating pump 130, the circulating pump 130 is arranged between the heat collecting heat exchanger 120 and the solar heat collector 110; the working medium pump 240, the working medium pump 240 is arranged between the heat collecting heat exchanger 120 and the third heat exchanger 220; an injection system electronic expansion valve 250, the injection system electronic expansion valve 250 being provided between the third heat exchanger 220 and the refrigeration heat exchanger 230; a first expansion valve 341, the first expansion valve 341 being provided between the first heat exchanger 323 and the air conditioner indoor unit 310; a second expansion valve 342, wherein the second expansion valve 342 is arranged between the refrigeration heat exchanger 230 and the air conditioner indoor unit 310; a first electromagnetic valve 41, wherein the first electromagnetic valve 41 is arranged on the second refrigerant connecting pipeline 40; a second electromagnetic valve 51, wherein the second electromagnetic valve 51 is arranged on the third refrigerant connecting pipeline 50; and a third solenoid valve 260, the third solenoid valve 260 being disposed between the heat collecting heat exchanger 120 and the injector 210.
In the present embodiment, the circulation pump 130 is disposed between the heat collecting heat exchanger 120 of the third heat exchanger 220 and the solar heat collector 110 to provide power for the circulation of the cooling medium or water in the solar heat collecting unit 10. The working medium pump 240 is disposed between the heat collecting heat exchanger 120 and the third heat exchanger 220 to control the flow circulation speed of the cooling medium in the injection type refrigeration unit 20. The injection system electronic expansion valve 250 is disposed between the third heat exchanger 220 and the refrigeration heat exchanger 230, and plays a role in adjusting the flow rate of the refrigerant in the third refrigerant circulation pipeline. The first expansion valve 341 is disposed between the first heat exchanger 323 and the air conditioner indoor unit 310, and adjusts a refrigerant flow rate in the first refrigerant circulation line in which the first compressor 321 is located. The second solenoid valve 51 is disposed on the third refrigerant connection pipeline 50, and adjusts a refrigerant flow rate in the second refrigerant circulation pipeline where the second compressor 322 is located. The third solenoid valve 260 is disposed between the heat collecting heat exchanger 120 and the ejector 210, and adjusts a refrigerant flow rate in a fourth refrigerant circulation line formed by the ejector 210 and the third heat exchanger 220.
In the present embodiment, the circulation pump 130 provides power for the circulation of the refrigerant in the solar heat collecting unit 10, and can accelerate or decelerate the circulation speed. Similarly, the working medium pump 240 is disposed in the ejector-type refrigeration unit 20, and functions to control the flow circulation speed of the refrigerant in the unit. The injection system electronic expansion valve 250, the first solenoid valve 41, the second solenoid valve 51, and the third solenoid valve 260 control the opening and closing of the corresponding pipes in the air conditioning system 1. The first expansion valve 341 and the second expansion valve 342 are control valves for adjusting the pressure in the refrigerant circulation line in the air conditioner external unit 320.
Example two:
in a specific embodiment, referring to fig. 8, there is further provided a control method of an air conditioning system, the control method being implemented by the air conditioning system in the above embodiment, the control method including:
s100: judging the operation load requirement of the air conditioning system;
s200: and controlling the air conditioning system to switch the operation equipment according to the operation load requirement.
In the present embodiment, the above-described structure is to save energy for the air conditioning system and to satisfy the load required for operation of the air conditioning system as much as possible. In order to accurately adjust the operation of each component in the whole air conditioning system by a control method, the load requirement in the air conditioning system needs to be known and judged. And controlling the air conditioning system to switch the operation equipment according to the obtained load requirement, so that the air conditioning system adjusts a refrigerant circulation mode meeting the existing load requirement.
In this embodiment, acquiring and determining the load demand is a method for accurately acquiring the state of the air conditioning system, the load demand is the most direct condition capable of determining the opening and closing of the internal components of the air conditioning system, and the control of the opening and closing of the internal devices of the air conditioning system according to the operating load demand is more accurate and scientific. The load is constantly changed when the air conditioning system operates normally, corresponding running equipment needs to be automatically switched according to the change of the load, and the equipment keeps the optimal energy-saving state. Whether to switch the air conditioning system operation equipment and how to switch the air conditioning system operation equipment need to be adjusted according to the operation load requirement of the air conditioning system, which is the inventive concept of the scheme, so that the operation load requirement of the air conditioning system needs to be judged firstly, and then the operation equipment needs to be switched. The method has the advantages that the components in the air conditioning system can be adjusted in time according to the load requirement of the air conditioning system, and energy conservation is facilitated.
In a specific embodiment, the determining the operation load requirement of the air conditioning system specifically includes: detecting the corresponding air conditioning system pressure according to the operation mode to obtain a detection pressure value; comparing the detected pressure value with a set pressure threshold value to obtain the operating load requirement of the air conditioning system; the detection pressure value of the air conditioning system in the refrigeration mode is a first detection pressure value, and the detection pressure value of the air conditioning system in the heating mode is a second detection pressure value; when the first detection pressure value is smaller than and/or equal to the first set pressure threshold value, the operation load requirement of the air conditioning system is a first operation load requirement; when the first detection pressure value is larger than a second set pressure threshold value, the operation load requirement of the air conditioning system is a second operation load requirement; when the first detected pressure value is larger than a third set pressure threshold value, the operation load demand of the air conditioning system is a third operation load demand; when the second detected pressure value is greater than the fourth set pressure threshold value, the operating load requirement of the air conditioning system is a fourth operating load requirement; when the second detected pressure value is smaller than and/or equal to a fifth set pressure threshold value, the operation load requirement of the air conditioning system is a fifth operation load requirement; and when the second detected pressure value is smaller than and/or equal to the sixth set pressure threshold value, the operation load demand of the air conditioning system is the sixth operation load demand.
In this embodiment, when the operating load demand of the air conditioning system is specifically judged, the judgment is mainly performed through the pressure of the air conditioning system, and the pressure value is the most effective parameter for judging the load condition. During detection, the detection pressure value of the air conditioning system is obtained, but because the air conditioning system has different pressures in the heating mode and the cooling mode, during detection, the detection pressure value of the air conditioning system in the cooling mode is a first detection pressure value, and the detection pressure value of the air conditioning system in the heating mode is a second detection pressure value.
Further, the load condition of the specific air conditioning system can be obtained by comparing the obtained detection pressure value with the set pressure threshold value. The pressure threshold is set as a pressure threshold stored in the air conditioning system or preset in advance. Moreover, the set pressure threshold in the present case includes: the air conditioning system comprises a first set pressure threshold, a second set pressure threshold and a third set pressure threshold, wherein the three set pressure thresholds are compared with a first detection pressure value under the refrigeration condition, and the operation load demand of the air conditioning system under the refrigeration condition can be divided into three different load demands through the three set pressure thresholds; the setting of the pressure threshold in the present case further comprises: the air conditioning system comprises a fourth set pressure threshold, a fifth set pressure threshold and a sixth set pressure threshold, wherein the three set pressure thresholds are compared with the second detection pressure value under the heating condition, and the operating load requirement of the air conditioning system under the heating condition can be divided into three different load requirements through the three set pressure thresholds.
Further, in the cooling mode, the first operation load requirement is a condition that the operation load requirement of the air conditioning system is small, the second operation load requirement is a condition that the operation load requirement of the air conditioning system is general, and the third operation load requirement is a condition that the operation load requirement of the air conditioning system is large; in the heating mode, the fourth operation load demand is the condition that the operation load demand of the air conditioning system is small, the fifth operation load demand is the condition that the operation load demand of the air conditioning system is general, and the sixth operation load demand is the condition that the operation load demand of the air conditioning system is large.
In this embodiment, the operation load requirement of the air conditioning system can be judged by the condensing pressure of the air conditioning system, and the pressure value in the air conditioning system is preferably judged. And the air conditioning system has different operating pressures in the cooling mode and the heating mode, and corresponding pressure values are detected according to different operating modes and are compared with corresponding set threshold values. The pressure value detected in each mode is provided with three comparative threshold values, the three comparative threshold values are arranged at least, the small load requirement, the general load requirement and the large load requirement are divided, the division range is clear and reasonable according to the threshold values, and the control method is more reasonable.
In a specific embodiment, according to an operation load demand, the air conditioning system switching operation device specifically includes: when the operating load requirement of the air conditioning system is a first operating load requirement, starting a first compressor and continuing to refrigerate; when the operating load requirement of the air conditioning system is a second operating load requirement, starting the auxiliary heat exchange device and the second compressor and continuing to refrigerate; when the operating load requirement of the air conditioning system is a third operating load requirement, starting the auxiliary heat exchange device, the first compressor and the second compressor and continuing to refrigerate; when the operation load requirement of the air conditioning system is a fourth operation load requirement, starting the first compressor and continuing heating; when the operation load requirement of the air conditioning system is a fifth operation load requirement, starting the auxiliary heat exchange device and the first compressor and continuing heating; and when the operation load requirement of the air conditioning system is a sixth operation load requirement, starting the auxiliary heat exchange device, the first compressor and the second compressor and continuing heating.
In this embodiment, in the cooling mode, the first operating load requirement is a condition that the operating load requirement of the air conditioning system is small, and at this time, only one compressor is started in the air conditioning system to meet the load requirement, so that the first compressor is started and cooling is continued; in the refrigeration mode, the second operation load requirement is the condition that the operation load requirement of the air conditioning system is general, and at the moment, a compressor needs to be started and the auxiliary heat exchange device needs to be started in the air conditioning system to meet the load requirement, so that the auxiliary heat exchange device and the second compressor are started and refrigeration is continued; in the refrigeration mode, the third operation load demand is the condition that the operation load demand of the air conditioning system is large, at the moment, two compressors need to be started in the air conditioning system, and the auxiliary heat exchange device needs to be started to meet the load demand, so that the auxiliary heat exchange device, the first compressor and the second compressor are started, and refrigeration is continued;
in the heating mode, the fourth operation load requirement is the condition that the operation load requirement of the air conditioning system is small, at the moment, only one compressor is started in the air conditioning system to meet the load requirement, so that the second compressor is started and heating is continued; in the heating mode, the fifth operation load requirement is the condition that the operation load requirement of the air conditioning system is general, at the moment, a compressor needs to be started and the auxiliary heat exchange device needs to be started in the air conditioning system to meet the load requirement, so that the auxiliary heat exchange device and the first compressor are started and heating is continued; in the heating mode, the sixth operation load requirement is the condition that the operation load requirement of the air conditioning system is large, at the moment, two compressors need to be started in the air conditioning system, and the auxiliary heat exchange device needs to be started to meet the load requirement, so that the auxiliary heat exchange device, the first compressor and the second compressor are started and heating is continued;
in the embodiment, no matter in the heating mode or the cooling mode, when the load demand is small, only one compressor is started to operate; when the load requirement is general, the auxiliary heat exchange device and a compressor are started to operate; and when the load demand is larger, the auxiliary heat exchange device is started to operate with the two compressors. Different load requirements correspond to corresponding running equipment to start running, and the energy-saving performance is better.
Example three:
in a specific embodiment, referring to fig. 9, the air conditioner 3 includes: the air conditioning system 1 according to any of the above embodiments; alternatively, the air conditioner 3 is provided with a processor 4, a memory 5, and a program or instructions stored on the memory 5 and executable on the processor 4, which when executed by the processor 4, implement the control method of the air conditioning system 1 as in any one of the above embodiments.
In this embodiment, the air conditioner 3 having the air conditioning system 1 can achieve reasonable adjustment of the operating equipment and meet the load demand of the air conditioner 3.
Example four:
in a specific embodiment, referring to fig. 2-8, the present invention can be applied to cooling and heating of the air conditioning system 1, and the solar heat collecting unit 10 and the jet type cooling unit 20 are automatically switched according to the load, so as to achieve high efficiency and energy saving, and meet the cold and heat requirements of the room.
In the cooling mode:
when the operation load of the air conditioning system 1 is small, controlling the first compressor 321 to operate for refrigeration, and the cycle process is as shown in fig. 2; the specific cycle process is as follows: the refrigerant is firstly compressed by the first compressor 321 to become a high-temperature and high-pressure refrigerant, then enters the first heat exchanger 323 to release heat, becomes a low-temperature and low-pressure refrigerant, is further throttled and depressurized by the first expansion valve 341, and enters the air conditioner internal unit 310 to exchange heat and refrigerate after being depressurized, so that the circulation in the first refrigerant circulation pipeline is completed.
When the operating load demand of the air conditioning system 1 is general, the auxiliary heat exchange device 2 and the second compressor 322 are started and refrigeration is continued, and the cycle process is as shown in fig. 3; the specific cycle process is as follows: at one side of the air conditioner 30, the second compressor 322 is first turned on, the refrigerant is pressurized by the second compressor 322, and then cooled and depressurized by the second heat exchanger 324, the cooled and depressurized refrigerant exchanges heat by the refrigeration heat exchanger 230, is further cooled and depressurized to become a low-temperature and low-pressure refrigerant, and finally enters the air conditioner indoor unit 310 through the second expansion valve 342, so that the refrigerant circulation in the second refrigerant circulation pipeline is completed.
The circulation in the auxiliary heat exchange device 2 is that the circulation at the solar heat collection unit 10 is performed first, the circulation pump 130 injects water or other medium into the solar heat collection unit 10 for circulation, the solar heat collector 110 absorbs solar energy to increase the temperature of the medium, the medium passes through the solar heat collector 110 and then enters the heat collection heat exchanger 120, the heat exchange is performed at the heat collection heat exchanger 120, and after the heat exchange is completed, the medium returns to the circulation pump 130 from the outlet of the heat collection heat exchanger 120. The fifth refrigerant circulation line performed by the solar heat collecting unit 10 is described above.
The heat exchange with the high temperature medium in the heat collecting heat exchanger 120 is performed by the jet type refrigeration unit 20, the medium in the jet type refrigeration unit 20 firstly circulates to the heat collecting heat exchanger 120 after passing through the working medium pump 240, absorbs the heat at the heat collecting heat exchanger 120, becomes the high temperature medium, then enters the inlet of the ejector 210, passes through the ejector 210 and the third heat exchanger 220, and returns to the working medium pump 240, and the above is the medium circulation process in the fourth refrigerant circulation pipeline in the jet type refrigeration unit 20.
After passing through the heat collecting heat exchanger 120, the ejector 210 and the third heat exchanger 220, the medium flows to the refrigerant heat exchanger 230 in addition to the working medium pump 240, and then returns to the ejector 210 through the refrigerant heat exchanger 230, which is a medium circulation process in a third refrigerant circulation pipeline in the ejector refrigeration unit 20. The medium in the third refrigerant circulation line is a low-temperature and low-pressure medium, and heat absorption and temperature reduction of the refrigerant of the air conditioning device 30 are achieved through the refrigeration heat exchanger 230.
When the operating load demand of the air conditioning system 1 is large, the auxiliary heat exchange device 2, the first compressor 321 and the second compressor 322 are started and refrigeration is continued, and the cycle process is as shown in fig. 4; the specific cycle process is as follows: on one side of the air conditioner 30, the first compressor 321 and the second compressor 322 are first turned on, the refrigerant is pressurized by the first compressor 321 and the second compressor 322, then the pressurized refrigerant is cooled and depressurized by the second heat exchanger 324, the cooled and depressurized refrigerant is subjected to heat exchange by the refrigeration heat exchanger 230, is further cooled and depressurized to become a low-temperature and low-pressure refrigerant, and finally enters the air conditioner indoor unit 310 through the second expansion valve 342, so that the refrigerant circulation in the second refrigerant circulation pipeline is completed.
The circulation in the auxiliary heat exchange device 2 is that, firstly, circulation at the solar heat collection unit 10 is performed, the circulation pump 130 firstly injects water or other media into the solar heat collection unit 10 for circulation, solar energy is absorbed at the solar heat collector 110, the temperature of the media is increased, the media enters the heat collection heat exchanger 120 after passing through the solar heat collector 110, heat exchange is performed at the heat collection heat exchanger 120, and after the heat exchange is completed, the media returns to the circulation pump 130 from the outlet of the heat collection heat exchanger 120. The fifth refrigerant circulation line performed by the solar heat collecting unit 10 is described above.
The heat exchange with the high temperature medium in the heat collecting heat exchanger 120 is performed by the jet type refrigeration unit 20, the medium in the jet type refrigeration unit 20 firstly circulates to the heat collecting heat exchanger 120 after passing through the working medium pump 240, absorbs the heat at the heat collecting heat exchanger 120, becomes the high temperature medium, then enters the inlet of the ejector 210, passes through the ejector 210 and the third heat exchanger 220, and returns to the working medium pump 240, and the above is the medium circulation process in the fourth refrigerant circulation pipeline in the jet type refrigeration unit 20. After passing through the heat collecting heat exchanger 120, the ejector 210, and the third heat exchanger 220, the medium flows to the refrigerant heat exchanger 230, not only to the working medium pump 240, but also to the ejector 210 through the refrigerant heat exchanger 230, which is a medium circulation process in the third refrigerant circulation pipeline in the ejector refrigeration unit 20. The medium in the third refrigerant circulation line is a low-temperature and low-pressure medium, and the refrigerant of the air conditioning device 30 is cooled by absorbing heat through the refrigeration heat exchanger 230.
In the heating mode:
when the operation load of the air conditioning system 1 is small, the first compressor 321 is turned on and heating is continued, and the cycle process is as shown in fig. 5; the specific cycle process is as follows: the refrigerant is compressed by the first compressor 321 to become a high-temperature high-pressure refrigerant, then enters the air conditioner internal unit 310 to exchange heat, becomes a low-temperature low-pressure refrigerant after heat exchange is finished, is further cooled and depressurized by the first heat exchanger 323, and finally returns to the first compressor 321 to complete circulation.
When the operating load demand of the air conditioning system 1 is general, the auxiliary heat exchange device 2 and the first compressor 321 are started and heating is continued, and the cycle process is as shown in fig. 6; the specific cycle process is as follows: the refrigerant is compressed by the first compressor 321 to become a high-temperature and high-pressure refrigerant, and then enters the air conditioner indoor unit 310 for heat exchange, the refrigerant after heat exchange enters the jet type refrigeration unit 20 through the third refrigerant connecting pipeline 50, and after entering, the refrigerant circularly enters the heat collection heat exchanger 120 through the working medium pump 240 for heat exchange, the temperature of the refrigerant rises after passing through the heat collection heat exchanger 120, and finally the refrigerant enters the second heat exchanger 324 through the second refrigerant connecting pipeline 40 for heat exchange, and finally returns to the first compressor 321 again.
When the operating load demand of the air conditioning system 1 is large, the auxiliary heat exchange device 2, the first compressor 321, and the second compressor 322 are turned on and heating is continued, and the cycle process is as shown in fig. 7. The specific cycle process is as follows: the refrigerant is compressed by the first compressor 321 and the second compressor 322 to become a high-temperature and high-pressure refrigerant, and then enters the air conditioner internal unit 310 for heat exchange, and the refrigerant becomes a low-temperature and low-pressure refrigerant after the heat exchange is completed. The refrigerant flows in three parts at this time. The first flow direction is: after heat exchange, the refrigerant is further cooled and depressurized by the first heat exchanger 323, and finally returns to the first compressor 321 and the second compressor 322 to complete circulation; the second flow direction is as follows: the refrigerant after heat exchange finally returns to the first compressor 321 and the second compressor 322 through the refrigeration heat exchanger 230 and the second heat exchanger 324 to complete circulation; the third flow direction is: the refrigerant after heat exchange enters the jet type refrigeration unit 20 through the third refrigerant connecting pipeline 50, and after entering, the refrigerant circularly enters the heat collecting heat exchanger 120 through the working medium pump 240 to perform heat exchange, the temperature of the refrigerant rises through the heat collecting heat exchanger 120, and finally enters the second heat exchanger 324 through the second refrigerant connecting pipeline 40 to perform heat exchange, and finally returns to the first compressor 321 and the second compressor 322 again.
The refrigerant after heat exchange has three flow directions, the content distribution of the three inward-flowing refrigerants is adjusted according to the superheat degree of the outlet of each heat exchange part, and the superheat degree = the outlet temperature-the inlet temperature, so that complete evaporation is ensured, and the reliability of the compressor is ensured. On the premise of meeting the load requirement, based on the energy source priority principle, the priority of the refrigerant flow direction in the three flow directions is that the third flow direction is superior to the second flow direction in comparison with the first flow direction.
Referring to fig. 8, the energy saving control method of the air conditioner includes:
s100: judging the operation load requirement of the air conditioning system;
s200: and controlling the air conditioning system to switch the operation equipment according to the operation load requirement.
Specifically, the operation load requirement of the air conditioning system is judged, and the operation load requirement is obtained by comparing the detected pressure value with a set pressure threshold value.
In the refrigeration mode, when the first detection pressure value is less than or equal to a, the system operates in a small load demand mode; when the first detection pressure value is larger than b, the system automatically switches and operates in a common mode according to the load requirement; when the first detection pressure value is larger than c, the system automatically switches to operate according to a large load demand mode; wherein a preferably has a value of 26bar, in the range: 24-27bar; b preferably has a value of 29bar, in the range: 27-30bar; c preferably has a value of 31bar, in the range: 30-33bar.
In the heating mode, when the second detection pressure value is larger than d, the system operates in a small load demand mode; when the second detection pressure value is less than or equal to e, the system automatically switches and operates in a common mode according to the load requirement; when the second detection pressure value is less than or equal to f, the system automatically switches to operate according to a large load demand mode; wherein d is preferably 10bar, in the range: 9-11bar; e preferably has a value of 8bar, in the range: 7-9bar; f preferably has a value of 6bar, in the range: 5-7bar.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (6)

1. A control method of an air conditioning system is characterized in that,
the air conditioning system (1) comprises:
an auxiliary heat exchange device (2);
the air conditioning device (30) comprises an air conditioning outer unit (320) and at least one air conditioning inner unit (310), and the air conditioning outer unit (320) is connected with the auxiliary heat exchange device (2);
the outdoor unit (320) of an air conditioner includes: a first compressor (321), a second compressor (322), a first heat exchanger (323), a second heat exchanger (324);
the at least one air conditioner indoor unit (310), the first compressor (321) and the first heat exchanger (323) are sequentially connected to form a first refrigerant circulation pipeline, and the at least one air conditioner indoor unit (310), the second compressor (322), the second heat exchanger (324) and the auxiliary heat exchange device (2) are sequentially connected to form a second refrigerant circulation pipeline;
the air conditioning device (30) is provided with a first refrigerant connecting pipeline (330), one end of the first refrigerant connecting pipeline (330) is communicated between the first compressor (321) and the first heat exchanger (323), and the other end of the first refrigerant connecting pipeline (330) is communicated between the second compressor (322) and the second heat exchanger (324), so that the first compressor (321) can be communicated with the second heat exchanger (324) through the first refrigerant connecting pipeline (330) and can circulate with the auxiliary heat exchange device (2);
the auxiliary heat exchange device (2) comprises:
the injection type refrigeration unit (20), the injection type refrigeration unit (20) comprises a refrigeration heat exchanger (230), and the air conditioning device (30) exchanges heat with the injection type refrigeration unit (20) through the refrigeration heat exchanger (230);
the solar energy heat collection unit (10), the solar energy heat collection unit (10) comprises a heat collection heat exchanger (120), and the injection type refrigeration unit (20) exchanges heat with the solar energy heat collection unit (10) through the heat collection heat exchanger (120);
the ejector refrigeration unit (20) further comprises: an ejector (210), a third heat exchanger (220);
the ejector (210) is connected with the third heat exchanger (220) to form a fourth refrigerant circulation pipeline, after an outlet of the ejector (210) is connected with one end of the third heat exchanger (220), the other end of the third heat exchanger (220) is communicated with a second inlet (212) of the ejector (210) to form a fourth refrigerant circulation pipeline, and the fourth refrigerant circulation pipeline exchanges heat with the solar heat collection unit (10);
the air conditioning system (1) further comprises: a second refrigerant connecting pipeline (40), wherein one end of the second refrigerant connecting pipeline (40) is communicated with the second inlet (212) of the ejector (210), and the other end of the second refrigerant connecting pipeline is communicated to a pipeline between the second heat exchanger (324) and the refrigeration heat exchanger (230);
one end of the third refrigerant connecting pipeline (50) is connected to a pipeline between the air conditioner indoor unit (310) and the refrigeration heat exchanger (230), and the other end of the third refrigerant connecting pipeline (50) is connected to a pipeline communicated between the third heat exchanger (220) and the refrigeration heat exchanger (230);
the first expansion valve (341) is arranged between the first heat exchanger (323) and the air conditioner indoor unit (310);
a second expansion valve (342), wherein the second expansion valve (342) is arranged between the refrigeration heat exchanger (230) and the air conditioner indoor unit (310);
the control method comprises the following steps:
judging the operation load requirement of the air conditioning system;
controlling the air conditioning system to switch operating equipment according to the operating load requirement;
according to the operation load requirement, the air conditioning system switches operation equipment, and specifically comprises:
when the operation load demand of the air conditioning system is a first operation load demand, starting the first compressor and continuing to refrigerate;
when the operation load requirement of the air conditioning system is a second operation load requirement, starting the auxiliary heat exchange device and the second compressor and continuing to refrigerate;
when the operation load requirement of the air conditioning system is a third operation load requirement, starting the auxiliary heat exchange device, the first compressor and the second compressor and continuing to refrigerate;
when the operation load demand of the air conditioning system is a fourth operation load demand, starting the first compressor and continuing heating;
when the operation load requirement of the air conditioning system is a fifth operation load requirement, the auxiliary heat exchange device and the first compressor are started and heating is continued;
and when the operation load demand of the air conditioning system is a sixth operation load demand, starting the auxiliary heat exchange device, the first compressor and the second compressor and continuing heating.
2. The method according to claim 1, wherein the determining an operation load requirement of the air conditioning system specifically comprises:
detecting the corresponding air conditioning system pressure according to the operation mode to obtain a detection pressure value;
comparing the detected pressure value with a set pressure threshold value to obtain the operating load requirement of the air conditioning system;
the detection pressure value of the air conditioning system in the refrigeration mode is a first detection pressure value, and the detection pressure value of the air conditioning system in the heating mode is a second detection pressure value;
when the first detection pressure value is smaller than or equal to a first set pressure threshold value, the operation load requirement of the air conditioning system is the first operation load requirement;
when the first detected pressure value is larger than a second set pressure threshold value, the operation load requirement of the air conditioning system is the second operation load requirement;
when the first detected pressure value is greater than a third set pressure threshold value, the operating load requirement of the air conditioning system is the third operating load requirement;
when the second detected pressure value is greater than a fourth set pressure threshold value, the operating load requirement of the air conditioning system is the fourth operating load requirement;
when the second detected pressure value is smaller than or equal to a fifth set pressure threshold value, the operation load requirement of the air conditioning system is the fifth operation load requirement;
when the second detected pressure value is smaller than or equal to a sixth set pressure threshold value, the operation load requirement of the air conditioning system is the sixth operation load requirement;
wherein the first set pressure threshold, the second set pressure threshold, and the third set pressure threshold increase in sequence, and the fourth set pressure threshold, the fifth set pressure threshold, and the sixth set pressure threshold decrease in sequence.
3. The control method of an air conditioning system according to claim 1,
the refrigeration heat exchanger (230), the ejector (210) and the third heat exchanger (220) are sequentially connected to form a third refrigerant circulating pipeline, one end of the refrigeration heat exchanger (230) is communicated with a first inlet (211) of the ejector (210), an outlet of the ejector (210) is communicated with the third heat exchanger (220), and the other end of the third heat exchanger (220) is communicated with the other end of the refrigeration heat exchanger (230).
4. The control method of an air conditioning system according to claim 3, characterized in that the solar heat collecting unit (10) further comprises: a solar collector (110);
one end of the solar heat collector (110) is communicated with an inlet of the heat collecting heat exchanger (120), the other end of the solar heat collector is communicated with an outlet of the heat collecting heat exchanger (120), and the solar heat collector (110) is communicated with the heat collecting heat exchanger (120) to form a fifth refrigerant circulating pipeline.
5. The control method of an air conditioning system according to claim 4, characterized in that the air conditioning system (1) further comprises:
the circulating pump (130), the circulating pump (130) is set between the heat collecting heat exchanger (120) and the solar heat collector (110);
the working medium pump (240) is arranged between the heat collection heat exchanger (120) and the third heat exchanger (220);
an injection system electronic expansion valve (250), the injection system electronic expansion valve (250) being disposed between the third heat exchanger (220) and the refrigeration heat exchanger (230);
the first electromagnetic valve (41), the first electromagnetic valve (41) is arranged on the second refrigerant connecting pipeline (40);
a second solenoid valve (51), wherein the second solenoid valve (51) is arranged on the third refrigerant connecting pipeline (50);
a third solenoid valve (260), the third solenoid valve (260) being disposed between the heat collecting heat exchanger (120) and the injector (210).
6. An air conditioner, characterized in that the air conditioner (3) comprises:
the air conditioner (3) is provided with a processor (4), a memory (5) and a program or instructions stored on the memory (5) and executable on the processor (4), which program or instructions, when executed by the processor (4), implement a control method of an air conditioning system according to any one of claims 1-5.
CN202211169279.7A 2022-09-26 2022-09-26 Air conditioning system, control method and air conditioner Active CN115234976B (en)

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CN115076820A (en) * 2022-08-22 2022-09-20 宁波奥克斯电气股份有限公司 Air conditioner energy saving system, control method and air conditioner

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CN101270935A (en) * 2008-05-07 2008-09-24 中原工学院 Solar injection electric compression heat pump combined air-conditioning unit
JP2010271030A (en) * 2009-04-24 2010-12-02 Daikin Ind Ltd Refrigerating system
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