CN110579040A - refrigerant circulation system and control method, device and equipment thereof, and air conditioner - Google Patents
refrigerant circulation system and control method, device and equipment thereof, and air conditioner Download PDFInfo
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- CN110579040A CN110579040A CN201910932477.6A CN201910932477A CN110579040A CN 110579040 A CN110579040 A CN 110579040A CN 201910932477 A CN201910932477 A CN 201910932477A CN 110579040 A CN110579040 A CN 110579040A
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000002347 injection Methods 0.000 claims abstract description 64
- 239000007924 injection Substances 0.000 claims abstract description 64
- 239000013589 supplement Substances 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 14
- 238000005057 refrigeration Methods 0.000 claims description 10
- 238000004781 supercooling Methods 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
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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
- F24F11/70—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
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F25B31/00—Compressor arrangements
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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
- F25B41/00—Fluid-circulation arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The application discloses a refrigerant circulating system, a control method, a control device, control equipment and an air conditioner of the refrigerant circulating system. The refrigerant circulating system comprises a condenser, an economizer, an enthalpy injection compressor, an evaporator and a first throttling element; the economizer includes a first flowpath and a second flowpath; the first port of the first flow path is connected with the first port of the condenser, and the second port of the first flow path is connected with the first port of the evaporator through the first throttling element; the first port of the second flow path is connected with the first port of the condenser, and the second port of the second flow path is connected with an enthalpy injection port of the enthalpy injection compressor; an air suction port of the enthalpy injection compressor is connected with a second port of the evaporator, and an air exhaust port of the enthalpy injection compressor is connected with a second port of the condenser; when the first throttling element is opened, part of the refrigerant flows into the second flow path through the first throttling element, absorbs the heat of the refrigerant in the first flow path, is evaporated into gas, and flows into the enthalpy injection port of the enthalpy injection compressor to supplement the enthalpy of the enthalpy injection compressor.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to a refrigerant circulating system, a control method, a control device, control equipment and an air conditioner.
background
An air conditioner, which is a device capable of adjusting the temperature of an indoor environment, has been widely used, and can meet the demand of people on the comfort of the indoor environment.
In the related art, when the temperature difference between the outdoor unit of the air conditioner and the outdoor environment is small, the heat exchange efficiency between the outdoor unit and the outdoor environment is low, the load of the compressor is large, the leakage of the refrigerant inside the compressor is large, and further the capacity output attenuation of the air conditioner is large, for example, under the high-temperature outdoor environment, when the air conditioner refrigerates the indoor environment, because the temperature of the outdoor environment is very high, the temperature difference between the condenser of the outdoor unit and the outdoor environment is very small, the heat exchange efficiency is very low, the system high voltage of the air conditioner is very high, the load of the compressor is very large, the leakage of the refrigerant inside the compressor is very large, the output capacity attenuation is very large.
disclosure of Invention
the application aims to provide a refrigerant circulating system and a control method, a control device, equipment and an air conditioner of the refrigerant circulating system, so as to solve the problems that in the related art, the temperature difference between an outdoor unit of the air conditioner and an outdoor environment is small, the heat exchange efficiency is low, the load of a compressor is large, the refrigerant inside the compressor is large in leakage, and the capacity output attenuation of the air conditioner is large.
the purpose of the application is realized by the following technical scheme:
a refrigerant cycle system, comprising:
the system comprises a condenser, an economizer, an enthalpy injection compressor, an evaporator and a first throttling element;
The economizer includes a first flowpath and a second flowpath; a first port of the first flow path is connected with a first port of the condenser, and a second port of the first flow path is connected with a first port of the evaporator; a first port of the second flow path is connected with a first port of the condenser through a first throttling element, and a second port of the second flow path is connected with an enthalpy injection port of the enthalpy injection compressor;
an air suction port of the enthalpy injection compressor is connected with a second port of the evaporator, and an air exhaust port of the enthalpy injection compressor is connected with a second port of the condenser;
when the first throttling element is opened, part of the refrigerant flows into the second flow path through the first throttling element, absorbs the heat of the refrigerant in the first flow path, evaporates into gas, and flows into an enthalpy injection port of the enthalpy injection compressor to supplement air to the enthalpy injection compressor.
Optionally, an opening degree of the first throttling element is adjustable, so that an amount of air compensation flowing into an enthalpy injection port of the enthalpy injection compressor is adjustable.
Optionally, in the refrigeration mode, after absorbing heat, the supercooling degree of the refrigerant in the first flow path is increased, and the refrigerant flows into the evaporator;
The opening degree of the first throttling element is adjustable, so that the supercooling degree of the refrigerant flowing into the evaporator is adjustable.
Optionally, the device further comprises a four-way valve;
and the air suction port of the enthalpy-spraying compressor is connected with the second port of the evaporator through the four-way valve, and the air exhaust port is connected with the second port of the condenser through the four-way valve.
Optionally, a second throttling element is arranged at the first port of the evaporator, and a third throttling element is arranged at the first port of the condenser;
In the cooling mode, the opening degree of the third throttling element is maximum, and the second throttling element is in a throttling state.
optionally, in the heating mode, the opening degree of the second throttling element is maximum, and the third throttling element is in a throttling state.
Optionally, the enthalpy injection compressor is a two-stage enthalpy injection compressor.
Optionally, the economizer is a plate heat exchanger or a double-pipe heat exchanger.
Optionally, the first throttling element is an electronic expansion valve;
And/or the second throttling element is an electronic expansion valve;
And/or the third throttling element is an electronic expansion valve.
An air conditioner comprising a refrigerant circulation system as claimed in any one of the above.
A method for controlling a refrigerant circulation system, applied to any one of the above refrigerant circulation systems, the method comprising:
Detecting the temperature of the outdoor environment in real time;
Comparing the detected temperature of the outdoor environment with a preset value;
And controlling the opening and closing of the first throttling element according to the comparison result.
optionally, the controlling the switch of the first throttling element according to the comparison result includes:
In the refrigeration mode, if the temperature of the outdoor environment is greater than or equal to a preset value, the first throttling element is controlled to be opened, and if the temperature of the outdoor environment is less than the preset value, the first throttling element is controlled to be closed.
Optionally, if the first port of the evaporator is provided with a second throttling element, and the second port of the condenser is provided with a third throttling element, the method further includes:
In a refrigeration mode, controlling the opening degree of the third throttling element to be maximum, and controlling the second throttling element to be in a throttling state;
and in the heating mode, the opening degree of the second throttling element is controlled to be maximum, and the third throttling element is controlled to be in a throttling state.
A control device for a refrigerant cycle system, applied to any one of the refrigerant cycle systems, the control device comprising:
the detection module is used for detecting the temperature of the outdoor environment in real time;
the comparison module is used for comparing the detected temperature of the outdoor environment with a preset value;
And the control module is used for controlling the opening and closing of the first throttling element according to the comparison result.
A control apparatus for a refrigerant cycle system, applied to any one of the refrigerant cycle systems, comprising:
A processor, and a memory coupled to the processor;
The memory is used for storing a computer program;
The processor is configured to call and execute the computer program in the memory to perform the control method according to any one of the above.
this application adopts above technical scheme, has following beneficial effect:
In the scheme of the application, an economizer and a first throttling element are arranged between a condenser and a compressor, the economizer comprises a first flow path and a second flow path, and based on the characteristics of the economizer, the refrigerant in the second flow path of the economizer can absorb the heat of the refrigerant in the first flow path to be evaporated into gas, and on the basis, the condenser, the first flow path of the economizer, the evaporator and the compressor form a main flow path of a refrigerant circulating system, wherein the adopted compressor is an enthalpy injection compressor, when the temperature difference between an outdoor unit of an air conditioner and the outdoor environment is small, the heat exchange efficiency between the outdoor unit and the outdoor environment is low, the load of the compressor is large, and the refrigerant in the compressor is greatly leaked, the first throttling element can be opened, when the first throttling element is opened, part of the refrigerant in the main flow path can enter the second flow path through the first throttling element to absorb the heat of the refrigerant in the first flow path to be evaporated into gas, and flows into the enthalpy injection port of the enthalpy injection compressor to supplement air to the enthalpy injection compressor, so that the output capacity of the enthalpy injection compressor is ensured not to be attenuated.
drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, 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 a refrigerant circulation system according to an embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram of a refrigerant circulation system according to another embodiment of the present disclosure.
Fig. 3 is a flowchart illustrating a method for controlling a refrigerant circulation system according to another embodiment of the present disclosure.
fig. 4 is a structural diagram of a control device of a refrigerant cycle system according to another embodiment of the present application.
Fig. 5 is a structural diagram of a control apparatus of a refrigerant cycle system according to another embodiment of the present application.
Detailed Description
in order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.
examples
Referring to fig. 1, fig. 1 is a schematic structural diagram of a refrigerant circulation system according to an embodiment of the present disclosure.
as shown in fig. 1, the refrigerant circulation system provided in this embodiment includes:
A condenser 101, an economizer 102, an enthalpy injection compressor 103, an evaporator 104, a first throttling element 105;
the economizer 102 includes a first flow path 112 and a second flow path 122; a first port of the first flow path 112 is connected to a first port of the condenser 101, and a second port is connected to a first port of the evaporator 104; a first port of the second flow path 122 is connected to a first port of the condenser 101 via the first throttle element 105, and a second port is connected to an enthalpy injection port of the enthalpy injection compressor 103;
An air suction port of the enthalpy injection compressor 103 is connected with a second port of the evaporator 104, and an air exhaust port is connected with a second port of the condenser 101;
when the first throttling element 105 is opened, part of the refrigerant flows into the second flow path 122 through the first throttling element 105, absorbs the heat of the refrigerant in the first flow path 112, evaporates into gas, and flows into the enthalpy injection port of the enthalpy injection compressor 103 to supplement the enthalpy injection compressor 103 with air.
the enthalpy injection compressor 103, i.e. the enhanced vapor injection compressor, has one more intermediate-pressure air supply port than the ordinary compressor, i.e. the above-mentioned enthalpy injection port, and the specific working principle of the enthalpy injection compressor 103 may refer to the existing mature technology, and will not be described in detail here.
In the scheme of the application, an economizer 102 and a first throttling element 105 are arranged between a condenser 101 and a compressor, the economizer 102 comprises a first flow path 112 and a second flow path 122, based on the characteristics of the economizer 102, the refrigerant in the second flow path 122 of the economizer 102 can absorb the heat of the refrigerant in the first flow path 112 and evaporate into gas, based on the above, the condenser 101, the first flow path 112 of the economizer 102, an evaporator 104 and an enthalpy injection compressor 103 form a main flow path of a refrigerant circulation system, wherein, as the adopted compressor is the enthalpy injection compressor 103, when the temperature difference between an outdoor unit of an air conditioner and the outdoor environment is small, the heat exchange efficiency between the outdoor unit and the outdoor environment is low, the load of the compressor is large, and the leakage of the refrigerant inside the compressor is large, the first throttling element 105 can be opened, when the first throttling element 105 is opened, part of the refrigerant in the main flow path can enter the second flow path 122 through the first throttling element 105, the heat of the refrigerant in the first flow path 112 is absorbed and evaporated into gas, and the gas flows into the enthalpy injection port of the enthalpy injection compressor 103 to supplement gas to the enthalpy injection compressor 103, so that the output capacity of the enthalpy injection compressor 103 is ensured not to be attenuated.
Of course, when air replenishment is not required, the first throttling element 105 may be closed.
The cooling medium circulation system can be applied to the air conditioner, the cooling medium circulation system can be a single cooling system, namely, a system only in a cooling mode, at the moment, the air conditioner is a single cooling machine, and certainly, the cooling and heating system can also be a system in a cooling mode and a heating mode, at the moment, the air conditioner is a heat pump machine. In practical application, in a high-temperature area and in a refrigeration mode, the temperature difference between the temperature of the condenser 101 of the outdoor unit of the air conditioner and the outdoor environment is very small, heat exchange is very difficult, and the beneficial effect of the scheme is particularly obvious.
wherein, under the refrigeration mode, refrigerant endless main flow path does: the enthalpy injection compressor 103, the condenser 101, the first flow path 112 of the economizer 102, the evaporator 104 and the enthalpy injection compressor 103 circulate in this way, and in addition, part of the refrigerant from the condenser 101 enters the enthalpy injection compressor 103 through the first throttling element 105 and the second flow path 122 of the economizer 102.
In the heating mode, a main flow path of the refrigerant cycle is reversed, and a part of the refrigerant flowing out of the first flow path 112 of the economizer 102 enters the enthalpy injection compressor 103 through the first throttling element 105 and the second flow path 122 of the economizer 102.
the enthalpy injection compressor 103 can be air-supplemented in either the cooling mode or the heating mode.
in some embodiments, the opening degree of the first throttling element 105 is adjustable, so that the amount of air compensation flowing into the enthalpy injection port of the enthalpy injection compressor 103 is adjustable. The opening degree of the first throttling element 105 is different, correspondingly, the refrigerant amount entering the second flow path 122 is different, the obtained air supplement amount is different, and in implementation, the opening degree of the first throttling element 105 can be adjusted according to actual needs, so that the air supplement amount is easier and more accurate to control, and the reliability is improved.
In the cooling mode, since the refrigerant in the second flow path 122 absorbs heat of the refrigerant in the first flow path 112, the temperature is lowered, which corresponds to that, in the cooling mode, the refrigerant in the first flow path 112 has a raised supercooling degree after absorbing heat, and then flows into the evaporator 104. Therefore, the air is supplied to the enthalpy injection compressor 103, the output capacity is ensured, and the supercooling degree can be improved. Preferably, the opening degree of the first throttling element 105 is adjustable, so that the supercooling degree of the refrigerant flowing into the evaporator 104 is adjustable. Similarly, the opening degree of the first throttling element 105 is different, and accordingly, the amount of the refrigerant entering the second flow path 122 is different, and the heat of the refrigerant in the first flow path 112 needs to be absorbed differently, so that the supercooling degree of the refrigerant in the first flow path 112 is different, in implementation, the opening degree of the first throttling element 105 can be adjusted according to actual needs, so that the supercooling degree control is easier and more accurate, for example, if the supercooling degree is to be increased, the opening degree of the first throttling element 105 can be increased.
if the refrigerant circulation system is a cooling and heating system, it can be understood that, as shown in fig. 2, the refrigerant circulation system may further include a four-way valve 107; the enthalpy injection compressor 103 has an inlet connected to a second port of the evaporator 104 via a four-way valve 107, and an outlet connected to a second port of the condenser 101 via the four-way valve 107. Specifically, referring to fig. 2, the enthalpy injection compressor 103 has a suction port connected to a first port of the four-way valve 107 and a discharge port connected to a second port of the four-way valve 107. A third port of the four-way valve 107 is connected to a second port of the evaporator 104, and a fourth port is connected to a second port of the condenser 101. The four-way valve 107 can realize the switching between the cooling mode and the heating mode, and the specific switching scheme can refer to the existing mature technology and is not detailed here.
In some embodiments, a second throttling element 106 is disposed at the first port of the evaporator 104, and a third throttling element 108 is disposed at the first port of the condenser 101; in the cooling mode, since the third throttling element 108 needs to be supercooled before throttling, the third throttling element 108 does not need to be throttled, and the opening degree of the third throttling element 108 is maximum and the second throttling element 106 is in a throttled state. Similarly, in the heating mode, the second throttling element 106 does not need to be throttled, the opening degree of the second throttling element 106 is the largest, and the third throttling element 108 is in a throttling state. When the throttling element is in a throttling state, the opening degree is smaller than the maximum opening degree.
the above-mentioned throttling elements are various in types, and optionally, the first throttling element 105 may be an electronic expansion valve, the second throttling element 106 may also be an electronic expansion valve, and the third throttling element 108 may also be an electronic expansion valve, and of course, these throttling elements may also be other devices having a throttling function.
the economizer 102 may be of various types, and may be, but is not limited to, a plate heat exchanger or a double tube heat exchanger. Thus, the economizer 102 and the first throttling element 105 form a gas supplementing structure with small volume and convenient structural installation.
Based on the same concept, another embodiment of the present application further provides an air conditioner including the refrigerant circulation system according to any of the above embodiments.
For a specific implementation of the air conditioner provided in this embodiment of the present application, reference may be made to the implementation of the refrigerant circulation system described in any of the above examples, which is not described herein again.
Referring to fig. 3, fig. 3 is a flowchart illustrating a method for controlling a refrigerant circulation system according to another embodiment of the present disclosure.
As shown in fig. 3, the method for controlling a refrigerant circulation system according to the present embodiment is applied to the refrigerant circulation system according to any of the above embodiments, and includes:
And step 31, detecting the temperature of the outdoor environment in real time.
step 32, comparing the detected temperature of the outdoor environment with a preset value.
And step 33, controlling the opening and closing of the first throttling element according to the comparison result.
Specifically, for example, when the temperature of the outdoor environment is greater than or equal to a preset value, the first throttling element is controlled to be opened in the cooling mode, and the first throttling element is controlled to be closed in the cooling mode. That is to say, when outdoor environment's temperature is higher, when the output capacity decay of spouting the enthalpy compressor is bigger, can't satisfy user's travelling comfort demand, at this moment, can control and open first throttling element, carry out the tonifying qi to spouting the enthalpy compressor to guaranteed that the output capacity of spouting the enthalpy compressor can not decay, if outdoor environment's temperature is lower, user's travelling comfort demand can be satisfied in the output of compressor, at this moment, can control and close first throttling element. In the heating mode, reference may be made to implementation.
The preset value can be set according to the requirement, and is not specifically limited herein.
in some embodiments, if the opening degree of the first throttling element is adjustable, the method may further include: the opening degree of the first throttling element is adjusted. Specifically, the opening degree of the first throttling element can be adjusted according to the temperature of the outdoor environment and the target superheat degree, so that the adjustment of the air supplement amount is realized, and the specific implementation mode of the opening degree adjustment is the existing mature technology and is not detailed here. Of course, other regulation strategies may be employed to regulate the air supplement amount.
in some embodiments, if the first port of the evaporator is provided with a second throttling element and the second port of the condenser is provided with a third throttling element, the method may further include: in the refrigeration mode, controlling the opening degree of the third throttling element to be maximum and controlling the second throttling element to be in a throttling state; and in the heating mode, the opening degree of the second throttling element is controlled to be maximum, and the third throttling element is controlled to be in a throttling state.
referring to fig. 4, fig. 4 is a structural diagram of a control device of a refrigerant circulation system according to another embodiment of the present disclosure.
as shown in fig. 4, the control device of a refrigerant cycle system according to the present embodiment is applied to the refrigerant cycle system according to any of the above embodiments, and includes:
A detection module 401 for detecting the temperature of the outdoor environment in real time;
a comparing module 402, configured to compare the detected temperature of the outdoor environment with a preset value;
And a control module 403 for controlling the opening and closing of the first throttling element according to the comparison result.
Optionally, the control module is specifically configured to:
in the refrigeration mode, if the temperature of the outdoor environment is greater than or equal to a preset value, the first throttling element is controlled to be opened, and if the temperature of the outdoor environment is less than the preset value, the first throttling element is controlled to be closed.
If the opening degree of the first throttling element is adjustable, the control module is further configured to: the opening degree of the first throttling element is adjusted.
Optionally, if the first port of the evaporator is provided with a second throttling element, and the second port of the condenser is provided with a third throttling element, the method may further include:
in the refrigeration mode, controlling the opening degree of the third throttling element to be maximum and controlling the second throttling element to be in a throttling state;
and in the heating mode, the opening degree of the second throttling element is controlled to be maximum, and the third throttling element is controlled to be in a throttling state.
For a specific implementation of the control device of the refrigerant circulation system according to the embodiment of the present application, reference may be made to the implementation of the control method of the refrigerant circulation system according to any of the above embodiments, and details are not repeated herein.
Referring to fig. 5, fig. 5 is a structural diagram of a control apparatus of a refrigerant circulation system according to another embodiment of the present application.
As shown in fig. 5, the control apparatus of a refrigerant cycle system according to the present embodiment includes:
A processor 501, and a memory 502 connected to the processor 501;
the memory 502 is used to store computer programs;
The processor 501 is configured to call and execute a computer program in the memory to execute the control method of the refrigerant circulation system according to any of the above embodiments.
Optionally, the first throttling element, the second throttling element, the third throttling element and the four-way valve may be connected to a control device of the refrigerant circulation system.
for a specific implementation of the control apparatus of the refrigerant circulation system provided in this embodiment, reference may be made to the implementation of the control method of the refrigerant circulation system described in any of the above embodiments, and details are not described here again.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
it should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
it should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
it will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (15)
1. A refrigerant circulation system, comprising:
The system comprises a condenser, an economizer, an enthalpy injection compressor, an evaporator and a first throttling element;
The economizer includes a first flowpath and a second flowpath; a first port of the first flow path is connected with a first port of the condenser, and a second port of the first flow path is connected with a first port of the evaporator; a first port of the second flow path is connected with a first port of the condenser through a first throttling element, and a second port of the second flow path is connected with an enthalpy injection port of the enthalpy injection compressor;
An air suction port of the enthalpy injection compressor is connected with a second port of the evaporator, and an air exhaust port of the enthalpy injection compressor is connected with a second port of the condenser;
When the first throttling element is opened, part of the refrigerant flows into the second flow path through the first throttling element, absorbs the heat of the refrigerant in the first flow path, evaporates into gas, and flows into an enthalpy injection port of the enthalpy injection compressor to supplement air to the enthalpy injection compressor.
2. the refrigerant circulation system as claimed in claim 1, wherein an opening degree of the first throttling element is adjustable, so that an amount of a supplement gas flowing into an enthalpy injection port of the enthalpy injection compressor is adjustable.
3. The refrigerant cycle system as claimed in claim 1, wherein in the cooling mode, the refrigerant in the first flow path has a raised supercooling degree after absorbing heat and flows into the evaporator;
The opening degree of the first throttling element is adjustable, so that the supercooling degree of the refrigerant flowing into the evaporator is adjustable.
4. the refrigerant cycle system as set forth in claim 1, further comprising a four-way valve;
and the air suction port of the enthalpy-spraying compressor is connected with the second port of the evaporator through the four-way valve, and the air exhaust port is connected with the second port of the condenser through the four-way valve.
5. the refrigerant cycle system as claimed in claim 4, wherein a second throttling element is provided at the first port of the evaporator, and a third throttling element is provided at the first port of the condenser;
In the cooling mode, the opening degree of the third throttling element is maximum, and the second throttling element is in a throttling state.
6. The refrigerant circulation system as claimed in claim 5,
In the heating mode, the opening degree of the second throttling element is maximum, and the third throttling element is in a throttling state.
7. The refrigerant cycle system as claimed in claim 1, wherein the enthalpy injection compressor is a two-stage enthalpy injection compressor.
8. The refrigerant circulation system as claimed in claim 1, wherein the economizer is a plate heat exchanger or a double pipe heat exchanger.
9. The refrigerant circulation system as claimed in claim 5, wherein the first throttling element is an electronic expansion valve;
and/or the second throttling element is an electronic expansion valve;
and/or the third throttling element is an electronic expansion valve.
10. an air conditioner, characterized by comprising the refrigerant circulation system as claimed in any one of claims 1 to 9.
11. A method for controlling a refrigerant cycle system, the method being applied to the refrigerant cycle system according to any one of claims 1 to 9, the method comprising:
detecting the temperature of the outdoor environment in real time;
comparing the detected temperature of the outdoor environment with a preset value;
And controlling the opening and closing of the first throttling element according to the comparison result.
12. The control method according to claim 11, wherein the controlling the switching of the first throttling element according to the comparison result includes:
in the refrigeration mode, if the temperature of the outdoor environment is greater than or equal to a preset value, the first throttling element is controlled to be opened, and if the temperature of the outdoor environment is less than the preset value, the first throttling element is controlled to be closed.
13. the method of claim 11, wherein if the first port of the evaporator is provided with a second throttling element and the second port of the condenser is provided with a third throttling element, the method further comprises:
In a refrigeration mode, controlling the opening degree of the third throttling element to be maximum, and controlling the second throttling element to be in a throttling state;
And in the heating mode, the opening degree of the second throttling element is controlled to be maximum, and the third throttling element is controlled to be in a throttling state.
14. A control device for a refrigerant cycle system, which is applied to the refrigerant cycle system according to any one of claims 1 to 9, the control device comprising:
The detection module is used for detecting the temperature of the outdoor environment in real time;
The comparison module is used for comparing the detected temperature of the outdoor environment with a preset value;
and the control module is used for controlling the opening and closing of the first throttling element according to the comparison result.
15. a control apparatus for a refrigerant cycle system, applied to the refrigerant cycle system according to any one of claims 1 to 9, comprising:
A processor, and a memory coupled to the processor;
The memory is used for storing a computer program;
the processor is adapted to invoke and execute the computer program in the memory to perform the control method of any one of claims 11-13.
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| CN201910932477.6A CN110579040A (en) | 2019-09-29 | 2019-09-29 | refrigerant circulation system and control method, device and equipment thereof, and air conditioner |
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| CN201910932477.6A CN110579040A (en) | 2019-09-29 | 2019-09-29 | refrigerant circulation system and control method, device and equipment thereof, and air conditioner |
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