CN112815559A - Refrigerant cycle device and refrigerant cycle control method - Google Patents
Refrigerant cycle device and refrigerant cycle control method Download PDFInfo
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- CN112815559A CN112815559A CN202110010568.1A CN202110010568A CN112815559A CN 112815559 A CN112815559 A CN 112815559A CN 202110010568 A CN202110010568 A CN 202110010568A CN 112815559 A CN112815559 A CN 112815559A
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- accumulator
- refrigerant
- evaporator
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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
- F25B1/00—Compression machines, plants or systems with non-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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention provides a refrigerant circulating device and a refrigerant circulating control method, relating to the technical field of refrigeration or heating, and the refrigerant circulating device provided by the invention comprises: the system comprises an evaporator, a first liquid storage device, a condenser, a compressor and a second liquid storage device; the evaporator, the first liquid storage device, the condenser and the compressor are sequentially communicated end to form a circulation loop; the liquid phase region of the second reservoir is in fluid communication with the first reservoir; the liquid phase region of the first liquid storage device and the liquid phase region of the second liquid storage device are respectively communicated with a liquid inlet of the evaporator in a fluid mode; the vapor zone of the first reservoir and the vapor zone of the second reservoir are in fluid communication with the vapor outlet of the evaporator, respectively. The refrigerant circulating device provided by the invention can solve the technical problem that the refrigerant circulating device in the prior art is low in heat pump energy efficiency ratio in a low-temperature environment.
Description
Technical Field
The invention relates to the technical field of refrigeration or heating, in particular to a refrigerant circulating device and a refrigerant circulating control method.
Background
The air source heat pump adopts an environment-friendly heat exchange mode and can be applied to the refrigeration technology. However, when the outdoor environment is in a severe condition, such as the ambient temperature is lower than-5 ℃, the heating efficiency of the conventional air source heat pump host machine is reduced, and even the compressor is burnt out, so that normal heating cannot be performed. Particularly, when the heat pump main unit is defrosted in a low-temperature state, the heating capacity of the system is affected, the indoor temperature is reduced, and the indoor comfort is reduced.
Disclosure of Invention
The invention aims to provide a refrigerant circulating device and a refrigerant circulation control method, which are used for relieving the technical problem that the heat pump energy efficiency ratio of the refrigerant circulating device in the prior art is low in a low-temperature environment.
In a first aspect, the present invention provides a refrigerant cycle device comprising: the system comprises an evaporator, a first liquid storage device, a condenser, a compressor and a second liquid storage device;
the evaporator, the first liquid storage device, the condenser and the compressor are sequentially communicated end to form a circulation loop;
the liquid phase region of the second reservoir is in fluid communication with the first reservoir;
the liquid phase region of the first reservoir and the liquid phase region of the second reservoir are in fluid communication with the liquid inlet of the evaporator, respectively;
the vapor zone of the first reservoir and the vapor zone of the second reservoir are in fluid communication with the vapor outlet of the evaporator, respectively.
With reference to the first aspect, the present disclosure provides a first possible implementation manner of the first aspect, wherein a first control valve is disposed between the liquid phase region of the first reservoir and the liquid phase region of the second reservoir.
In combination with the first aspect, the present disclosure provides a second possible implementation of the first aspect, wherein the liquid phase region of the second reservoir is in fluid communication with the inlet portion of the evaporator.
With reference to the first aspect, the present disclosure provides a third possible implementation manner of the first aspect, wherein a second control valve is arranged between the liquid phase region of the second reservoir and the liquid inlet part of the evaporator.
With reference to the first aspect, the present disclosure provides a fourth possible implementation manner of the first aspect, wherein a restrictor is arranged between a liquid inlet portion of the evaporator and a liquid phase region of the first reservoir.
With reference to the first aspect, the present disclosure provides a fifth possible implementation manner of the first aspect, wherein the gas phase zone of the second accumulator is in fluid communication with a gas inlet portion of the compressor.
In combination with the fifth possible implementation form of the first aspect, the present disclosure provides a sixth possible implementation form of the first aspect, wherein the vapor region of the second reservoir is in fluid communication with the vapor outlet of the evaporator.
In combination with the sixth possible implementation manner of the first aspect, the present invention provides the seventh possible implementation manner of the first aspect, wherein the refrigerant cycle device further includes a third control valve that is installed between the gas phase region of the second accumulator and the gas outlet of the evaporator, and that is located between the gas phase region of the second accumulator and the gas inlet portion of the compressor.
In a second aspect, the present invention provides a refrigerant cycle control method that employs the above-described refrigerant cycle device, and includes the steps of:
flowing refrigerant from the first accumulator into the evaporator and flowing gaseous refrigerant through the compressor into the condenser, the liquid refrigerant formed in the condenser flowing into the first accumulator;
diverting liquid refrigerant in the first accumulator to the second accumulator;
directing refrigerant in the second accumulator into the circulation loop.
In combination with the second aspect, the present invention provides a first possible implementation manner of the second aspect, wherein the step of guiding the refrigerant in the second accumulator to the circulation circuit includes:
guiding the liquid refrigerant in the second liquid storage device to the liquid inlet end of the evaporator;
and/or directing the gaseous refrigerant in the second accumulator to an air intake of the compressor.
The embodiment of the invention has the following beneficial effects: adopt the evaporimeter, first reservoir, condenser and compressor head and the tail communicate in proper order in order to form circulation circuit's mode, liquid phase district through the second reservoir and first reservoir fluid intercommunication, the liquid phase district of first reservoir and the liquid phase district of second reservoir respectively with the inlet fluid intercommunication of evaporimeter, the gaseous phase district of first reservoir and the gaseous phase district of second reservoir respectively with the gaseous state export fluid intercommunication of evaporimeter, the refrigerant can flow between second reservoir and circulation circuit, not only can save the refrigerant in the first reservoir to the second reservoir in, and the refrigerant in the second reservoir can supply to circulation circuit in addition, and then alleviate the technical problem that heat pump energy efficiency ratio is low under the low temperature condition in the circulation circuit.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic view of a refrigerant cycle device according to an embodiment of the present invention.
Icon: 100-an evaporator; 200-a first reservoir; 300-a condenser; 400-a compressor; 500-a second reservoir; 600-a first control valve; 700-a second control valve; 800-a restrictor; 900-third control valve.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "physical quantity" in the formula, unless otherwise noted, is understood to mean a basic quantity of a basic unit of international system of units, or a derived quantity derived from a basic quantity by a mathematical operation such as multiplication, division, differentiation, or integration.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
As shown in fig. 1, a refrigerant cycle device according to an embodiment of the present invention includes: an evaporator 100, a first accumulator 200, a condenser 300, a compressor 400, and a second accumulator 500;
the evaporator 100, the first accumulator 200, the condenser 300 and the compressor 400 are sequentially communicated end to form a circulation loop;
the liquid phase region of the second reservoir 500 is in fluid communication with the first reservoir 200;
the liquid phase region of the first reservoir 200 and the liquid phase region of the second reservoir 500 are in fluid communication with the liquid inlet of the evaporator 100, respectively;
the gas phase zone of the first reservoir 200 and the gas phase zone of the second reservoir 500 are in fluid communication with the gaseous outlet of the vaporizer 100, respectively.
Specifically, the refrigerant in the first accumulator 200 flows into the evaporator 100, the vapor discharged from the evaporator 100 enters the compressor 400, the vapor compressed by the compressor 400 flows into the condenser 300, the condenser 300 condenses the formed liquid refrigerant, and the liquid refrigerant flows into the first accumulator 200, thereby forming a refrigerant circulation flow. The refrigerant in the first accumulator 200 may be stored in the second accumulator 500 by being drained. The liquid refrigerant in the liquid phase region of the second accumulator 500 may be drawn out to the liquid inlet of the evaporator 100, the gaseous refrigerant in the gas phase region of the second accumulator 500 is communicated with the gaseous outlet of the evaporator 100, the gaseous refrigerant in the evaporator 100 may flow into the second accumulator 500, and both the gaseous refrigerant in the second accumulator 500 and the gaseous refrigerant in the evaporator 100 may be introduced into the compressor 400.
In the process of circulating and flowing the refrigerant, the refrigerant in the first accumulator 200 can be stored in the second accumulator 500, and the refrigerant in the second accumulator 500 can be supplemented into the circulation circuit, so that the refrigerant in the circulation circuit is sufficient, and the technical problem of low energy efficiency ratio of the heat pump in the circulation circuit under the low temperature condition can be solved.
In the present embodiment, a first control valve 600 is disposed between the liquid phase region of the first reservoir 200 and the liquid phase region of the second reservoir 500.
Specifically, the liquid phase region of the first liquid reservoir 200 is communicated with the liquid phase region of the second liquid reservoir 500 through a first pipeline, the first control valve 600 is installed on the first pipeline, and the on-off state of the liquid phase region of the first liquid reservoir 200 and the liquid phase region of the second liquid reservoir 500 can be adjusted by adjusting the opening and closing of the first control valve 600.
Further, the liquid phase region of the second reservoir 500 is in fluid communication with the inlet portion of the evaporator 100.
Specifically, the liquid refrigerant in the liquid phase region of the second accumulator 500 may flow into the liquid inlet portion of the evaporator 100 through the second line. A second control valve 700 is arranged between the liquid phase region of the second accumulator 500 and the liquid inlet portion of the evaporator 100, and the liquid refrigerant in the liquid phase region of the second accumulator 500 is introduced into the liquid inlet portion of the evaporator 100 by adjusting the opening of the second control valve 700.
Further, a restrictor 800 is provided between the liquid inlet portion of the evaporator 100 and the liquid phase region of the first reservoir 200.
Specifically, the liquid refrigerant introduced into the evaporator 100 from the first accumulator 200 is throttled and depressurized by the throttle 800, and the depressurized liquid refrigerant is evaporated in the evaporator 100 to form a gaseous refrigerant.
Further, the gas phase zone of the second accumulator 500 is in fluid communication with the gas inlet portion of the compressor 400.
Specifically, the gaseous refrigerant in the second accumulator 500 may be compressed by the compressor 400 and then introduced into the condenser 300, so that the refrigerant in the second accumulator 500 is supplemented into the circulation circuit.
Further, the gas phase zone of the second reservoir 500 is in fluid communication with the gaseous outlet of the vaporizer 100.
Specifically, the refrigerant in the evaporator 100 may be introduced into and stored in the second accumulator 500 in a gaseous state.
Further, the refrigerant cycle device further includes a third control valve 900, the third control valve 900 being installed between the gas phase region of the second accumulator 500 and the gas outlet of the evaporator 100, and the third control valve 900 being located between the gas phase region of the second accumulator 500 and the gas inlet portion of the compressor 400.
When the third control valve 900 is closed, the gas phase area of the second accumulator 500 is blocked from the gas outlet of the evaporator 100, and the gas phase area of the second accumulator 500 is blocked from the gas inlet portion of the compressor 400; when the third control valve 900 is opened, the gaseous refrigerant may flow into the air intake portion of the compressor 400 from the gas phase region of the second accumulator 500 and the evaporator 100.
Example two
As shown in fig. 1, the refrigerant cycle control method according to the embodiment of the present invention employs the refrigerant cycle device according to the first embodiment, and includes the steps of:
flowing the refrigerant from the first accumulator 200 into the evaporator 100, and flowing the gaseous refrigerant into the condenser 300 through the compressor 400, and flowing the liquid refrigerant formed in the condenser 300 into the first accumulator 200;
draining the liquid refrigerant in the first accumulator 200 to the second accumulator 500;
the refrigerant in the second accumulator 500 is guided to the circulation circuit.
Specifically, the liquid refrigerant in the first accumulator 200 may be drained and stored in the second accumulator 500, and the refrigerant in the second accumulator 500 is introduced into the circulation circuit, so that the refrigerant in the circulation circuit may be supplemented.
In an embodiment of the present invention, the step of guiding the refrigerant in the second accumulator 500 to the circulation circuit includes:
guiding the liquid refrigerant in the second accumulator 500 to the liquid inlet end of the evaporator 100;
and/or the gaseous refrigerant in the second accumulator 500 is directed to the air intake of the compressor 400.
Specifically, the refrigerant in the second accumulator 500 may be introduced into the circulation circuit in two modes, the gaseous refrigerant in the gas phase region of the second accumulator 500 may flow into the gas inlet portion of the compressor 400, and the liquid refrigerant in the liquid phase region of the second accumulator 500 may flow into the liquid inlet of the evaporator 100. When the second control valve 700 is opened and the third control valve 900 is closed, the refrigerant in the second accumulator 500 enters the liquid inlet of the evaporator 100 in a liquid state; when the second control valve 700 is closed and the third control valve 900 is opened, the refrigerant in the second accumulator 500 is introduced into the intake portion of the compressor 400 in a gaseous state; when both the second control valve 700 and the third control valve 900 are opened, the refrigerant of the liquid phase region in the second accumulator 500 flows into the liquid inlet of the evaporator 100, and the refrigerant of the gas phase region in the second accumulator 500 flows into the air inlet portion of the compressor 400.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A refrigerant cycle device, characterized by comprising: an evaporator (100), a first accumulator (200), a condenser (300), a compressor (400), and a second accumulator (500);
the evaporator (100), the first reservoir (200), the condenser (300) and the compressor (400) are sequentially communicated end to form a circulation loop;
the liquid phase region of the second reservoir (500) is in fluid communication with the first reservoir (200);
the liquid phase region of the first reservoir (200) and the liquid phase region of the second reservoir (500) are in fluid communication with the liquid inlet of the evaporator (100), respectively;
the gas phase zone of the first reservoir (200) and the gas phase zone of the second reservoir (500) are in fluid communication with the gaseous outlet of the evaporator (100), respectively.
2. The refrigerant cycle device according to claim 1, wherein a first control valve (600) is provided between a liquid phase region of the first accumulator (200) and a liquid phase region of the second accumulator (500).
3. A refrigerant cycle device according to claim 1, wherein the liquid phase region of the second accumulator (500) is in fluid communication with the inlet portion of the evaporator (100).
4. The refrigerant cycle device according to claim 1, wherein a second control valve (700) is provided between a liquid phase region of the second accumulator (500) and an inlet portion of the evaporator (100).
5. A refrigerant cycle device according to claim 1, wherein a restrictor (800) is provided between a liquid-phase region of the first accumulator (200) and a liquid-phase portion of the evaporator (100).
6. The refrigerant cycle device according to claim 1, wherein a gas phase region of the second accumulator (500) is in fluid communication with an intake portion of the compressor (400).
7. The refrigerant cycle device according to claim 6, wherein the gas phase zone of the second accumulator (500) is in fluid communication with the gaseous outlet of the evaporator (100).
8. The refrigerant cycle device according to claim 7, further comprising a third control valve (900), the third control valve (900) being installed between a gas phase region of the second accumulator (500) and a gas outlet of the evaporator (100), and the third control valve (900) being located between the gas phase region of the second accumulator (500) and an air intake of the compressor (400).
9. A refrigerant cycle control method, characterized in that the refrigerant cycle control method employs the refrigerant cycle device according to any one of claims 1 to 8, and comprises the steps of:
flowing refrigerant from the first accumulator (200) into the evaporator (100) and flowing gaseous refrigerant through the compressor (400) into the condenser (300), the liquid refrigerant formed in the condenser (300) flowing into the first accumulator (200);
-diverting liquid refrigerant in the first accumulator (200) into the second accumulator (500);
-directing the refrigerant in the second accumulator (500) into the circulation loop.
10. A refrigerant cycle control method as recited in claim 9, wherein the step of directing the refrigerant in the second accumulator (500) into the circulation circuit comprises:
-directing the liquid refrigerant in the second accumulator (500) to the inlet side of the evaporator (100);
and/or directing gaseous refrigerant in the second accumulator (500) to an intake of the compressor (400).
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| CN202110010568.1A CN112815559B (en) | 2021-01-05 | 2021-01-05 | Refrigerant cycle device and refrigerant cycle control method |
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| CN202110010568.1A CN112815559B (en) | 2021-01-05 | 2021-01-05 | Refrigerant cycle device and refrigerant cycle control method |
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| CN112815559B CN112815559B (en) | 2023-04-11 |
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