CN114111100A - Refrigerating system, control method and air conditioner - Google Patents

Refrigerating system, control method and air conditioner Download PDF

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Publication number
CN114111100A
CN114111100A CN202111355072.4A CN202111355072A CN114111100A CN 114111100 A CN114111100 A CN 114111100A CN 202111355072 A CN202111355072 A CN 202111355072A CN 114111100 A CN114111100 A CN 114111100A
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CN
China
Prior art keywords
semiconductor
compressor
semiconductor refrigerator
condenser
refrigeration system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111355072.4A
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Chinese (zh)
Inventor
王振雨
罗胜
杨蓉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
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Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202111355072.4A priority Critical patent/CN114111100A/en
Publication of CN114111100A publication Critical patent/CN114111100A/en
Pending legal-status Critical Current

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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
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F24F5/0042—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 characterised by the application of thermo-electric units or the Peltier effect
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
    • H02N11/002—Generators
    • 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
    • F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
    • F25B2321/02—Details of machines, plants or systems, using electric or magnetic effects using Peltier effects; using Nernst-Ettinghausen effects

Abstract

The invention discloses a refrigeration system, a control method and an air conditioner, wherein the refrigeration system comprises a compressor, a condenser, a throttle valve and an evaporator which are sequentially connected end to end; the air conditioner also comprises an electric storage assembly arranged on the air outlet side of the condenser and a semiconductor refrigeration assembly arranged between the compressor and the evaporator. The electric power storage assembly is arranged on the air outlet side of the condenser and used for recovering heat released by the condenser and converting the heat into electric quantity, so that the greenhouse effect caused by the heat is avoided; in addition, the electric energy source of the semiconductor refrigeration assembly is the heat released by the condenser, so that the waste heat utilization of the condensation heat is realized; the semiconductor refrigeration component can adjust the suction superheat value of the compressor, avoid that the exhaust temperature and the exhaust pressure of the compressor exceed the specified values when the suction superheat value is too high, and simultaneously avoid that the inlet of the compressor contains liquid refrigerants when the suction superheat value is lower or even lower than 0 ℃, so that the liquid impact phenomenon of the compressor is caused, and the service life of the compressor is influenced.

Description

Refrigerating system, control method and air conditioner
Technical Field
The invention relates to the technical field of refrigeration, in particular to a refrigeration system, a control method and an air conditioner.
Background
The refrigeration system is generally composed of four main components, namely an evaporator, a compressor, a condenser and an expansion valve, which are sequentially connected into a closed circulation system through pipelines. The liquid refrigerant absorbs the heat of the cooled space or the cooled object in the evaporator, is gasified into low-temperature and low-pressure gas refrigerant, is sucked by the compressor, is compressed into high-temperature and high-pressure gas refrigerant, is discharged into the condenser, releases heat to the cooling medium (air) in the condenser, is condensed into high-pressure liquid refrigerant, is throttled into low-temperature and low-pressure liquid refrigerant by the expansion valve, and enters the evaporator again to absorb heat and be gasified, so that the aim of circulating refrigeration is fulfilled. Thus, the refrigerant is subjected to four basic processes of evaporation, compression, condensation and throttling in the system to complete a refrigeration cycle.
The suction temperature of a compressor in a refrigeration system has great influence on the reliability of the compressor, and when the suction superheat degree is overhigh, the exhaust temperature and the exhaust pressure of the compressor can exceed specified values; when the suction superheat degree is lower or even lower than 0 ℃, the liquid refrigerant is contained in the inlet of the compressor, so that the liquid impact phenomenon of the compressor can be caused, and the service life of the compressor is influenced.
Disclosure of Invention
In view of the above, the present invention provides a refrigeration system, a control method and an air conditioner, which enable the suction temperature of a compressor to reach a set range by the arrangement of a semiconductor refrigeration component, thereby preventing the discharge temperature of the compressor from exceeding a predetermined value and preventing the compressor from liquid impact.
In order to solve the above problems, according to one aspect of the present application, an embodiment of the present invention provides a refrigeration system, including a compressor, a condenser, a throttle valve, and an evaporator, a discharge port of the compressor being connected to an inlet of the condenser, an outlet of the condenser being connected to an inlet of the throttle valve, an outlet of the throttle valve being connected to an inlet of the evaporator, an outlet of the evaporator being connected to a suction port of the compressor;
the refrigerating system also comprises an electric storage component arranged on the air outlet side of the condenser and a semiconductor refrigerating component arranged between the compressor and the evaporator, wherein the electric storage component recovers heat released by the condenser and is used for providing electric energy for the semiconductor refrigerating component, and the semiconductor refrigerating component is used for adjusting the suction superheat value of the compressor.
In some embodiments, the semiconductor refrigeration assembly includes a first semiconductor refrigerator for cooling the refrigerant and a second semiconductor refrigerator for heating the refrigerant, the first semiconductor refrigerator and the second semiconductor refrigerator being disposed in sequence between the evaporator and the compressor; and the first semiconductor refrigerator and the second semiconductor refrigerator are both connected with the electric storage assembly.
In some embodiments, the power storage assembly comprises a semiconductor thermoelectric generator and a storage battery, the hot end of the semiconductor thermoelectric generator is positioned on the air outlet side of the condenser, the semiconductor thermoelectric generator is connected with the storage battery and stores electric energy in the storage battery, and the storage battery is respectively connected with the first semiconductor refrigerator and the second semiconductor refrigerator and supplies power to the first semiconductor refrigerator and the second semiconductor refrigerator.
In some embodiments, the power storage assembly further includes a first switch provided on a circuit in which the storage battery is connected to the first semiconductor refrigerator, and a second switch provided on a circuit in which the storage battery is connected to the second semiconductor refrigerator, the first switch and the second switch being turned on or off according to a suction superheat value of the compressor.
In some embodiments, the hot end of the first semiconductor refrigerator is connected to the hot end of the semiconductor thermoelectric generator by a thermally insulated conduit for increasing the temperature differential between the hot and cold ends of the semiconductor thermoelectric generator.
In some embodiments, the refrigeration system further includes a third semiconductor chiller disposed between the condenser and the throttle valve.
In some embodiments, the refrigeration system further includes a fourth semiconductor chiller disposed at the outlet of the evaporator.
In some embodiments, the third semiconductor refrigerator and the fourth semiconductor refrigerator are both connected to the electrical storage assembly.
In some embodiments, the hot ends of the third and fourth semiconductor refrigerators are connected to the hot end of the semiconductor thermoelectric generator by thermally insulated pipes for increasing the temperature difference between the hot and cold ends of the semiconductor thermoelectric generator.
In some embodiments, a third switch is provided on a circuit where the third semiconductor refrigerator is connected to the electric storage assembly, and a fourth switch is provided on a circuit where the fourth semiconductor refrigerator is connected to the electric storage assembly.
According to another aspect of the present application, an embodiment of the present invention provides a control method of a refrigeration system, the control method including the steps of:
the heat released by the condenser is recovered through the electric power storage assembly, and the heat is converted into electric energy;
according to the suction superheat value of the compressor, the working state of the semiconductor refrigeration assembly is controlled through electric energy, and then the suction superheat value meets the preset condition.
In some embodiments, the heat released by the condenser is recovered by the storage assembly and converted into electrical energy, in particular:
the temperature of the hot end of the semiconductor thermoelectric generator is increased through the heat released by the condenser, and then electric energy is generated through the temperature difference between the hot end and the cold end of the semiconductor thermoelectric generator and is stored in the storage battery.
In some embodiments, the operating state of the semiconductor refrigeration assembly is controlled by electric energy according to the suction superheat value of the compressor, specifically:
when the suction superheat value of the compressor is lower than a first preset value, the second switch is closed, and the second semiconductor refrigerator works to heat the refrigerant;
when the suction superheat value of the compressor is higher than a second preset value, the first switch is closed, and the first semiconductor refrigerator works to cool the refrigerant.
In some embodiments, the control method further comprises:
when the suction superheat value of the compressor is between the first preset value and the second preset value, the third switch and the fourth switch are closed, and the third semiconductor refrigerator and the fourth semiconductor refrigerator work to improve the cooling capacity.
According to another aspect of the present application, an embodiment of the present invention provides an air conditioner including the refrigeration system described above.
Compared with the prior art, the refrigeration system has at least the following beneficial effects:
the electric power storage assembly is arranged on the air outlet side of the condenser and used for recovering heat released by the condenser and converting the heat into electric quantity, so that the greenhouse effect caused by the heat is avoided;
in addition, the semiconductor refrigeration assembly is arranged, and the electric energy source of the semiconductor refrigeration assembly is the heat released by the condenser, so that the waste heat utilization of condensation heat is realized; the semiconductor refrigeration component can adjust the suction superheat value of the compressor, avoid that the exhaust temperature and the exhaust pressure of the compressor exceed the specified values when the suction superheat value is too high, and simultaneously avoid that the inlet of the compressor contains liquid refrigerants when the suction superheat value is lower or even lower than 0 ℃, so that the liquid impact phenomenon of the compressor is caused, and the service life of the compressor is influenced.
On the other hand, the control method of the refrigeration system provided by the present invention is designed based on the refrigeration system, and the beneficial effects thereof refer to the beneficial effects of the refrigeration system, which are not described herein again.
On the other hand, the air conditioner provided by the present invention is designed based on the above refrigeration system, and the beneficial effects thereof refer to the beneficial effects of the above refrigeration system, which are not described herein again.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a system block diagram of a refrigeration system provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of the storage and power supply of the storage module in a refrigeration system provided by an embodiment of the invention;
fig. 3 is a flowchart of a control method of a refrigeration system according to an embodiment of the present invention.
Wherein:
1. a compressor; 2. a condenser; 3. a throttle valve; 4. an evaporator; 5. an electricity storage module; 6. a semiconductor refrigeration assembly; 7. a third semiconductor refrigerator; 8. a fourth semiconductor refrigerator; 51. a semiconductor thermoelectric generator; 52. a storage battery; 53. a first switch; 54. a second switch; 61. a first semiconductor refrigerator; 62. a second semiconductor refrigerator; 71. a third switch; 81. and a fourth switch.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the predetermined object, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In the description of the present invention, it is to be understood that the terms "vertical", "lateral", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention, and do not mean that the device or member to which the present invention is directed must have a specific orientation or position, and thus, cannot be construed as limiting the present invention.
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; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
The present embodiment provides a refrigeration system, as shown in fig. 1 and fig. 2, the refrigeration system includes a compressor 1, a condenser 2, a throttle valve 3 and an evaporator 4, an exhaust port of the compressor 1 is connected to an inlet of the condenser 2, an outlet of the condenser 2 is connected to an inlet of the throttle valve 3, an outlet of the throttle valve 3 is connected to an inlet of the evaporator 4, and an outlet of the evaporator 4 is connected to an air suction port of the compressor 1;
the refrigerating system further comprises an electric power storage assembly 5 arranged on the air outlet side of the condenser 2 and a semiconductor refrigerating assembly 6 arranged between the compressor 1 and the evaporator 4, the electric power storage assembly 5 recovers heat released by the condenser 2 and is used for providing electric energy for the semiconductor refrigerating assembly 6, and the semiconductor refrigerating assembly 6 is used for adjusting the suction superheat value of the compressor 1.
Thus, by adopting the structure, the electric storage component 5 is arranged on the air outlet side of the condenser 2 and used for recovering the heat released by the condenser 2 and converting the heat into electric quantity, so that the greenhouse effect caused by the heat is avoided; in order to realize waste heat utilization, the electric energy source of the semiconductor refrigeration assembly 6 is the heat released by the condenser 2.
Specifically, the semiconductor refrigeration component 6 can adjust the suction superheat value of the compressor, so that the problems that when the suction superheat value is too high, the exhaust temperature and the exhaust pressure of the compressor exceed specified values, and when the suction superheat value is lower or even lower than 0 ℃, the inlet of the compressor contains liquid refrigerants, so that the liquid impact phenomenon of the compressor is caused, and the service life of the compressor is influenced are solved.
Specifically, the electricity storage module 5 may be directly fixed to the condenser 2, or may be fixed to the air outlet side of the condenser 2 by a bracket.
In a specific embodiment:
the semiconductor refrigeration assembly 6 comprises a first semiconductor refrigerator 61 for cooling the refrigerant and a second semiconductor refrigerator 62 for heating the refrigerant, wherein the first semiconductor refrigerator 61 and the second semiconductor refrigerator 62 are sequentially arranged between the evaporator 4 and the compressor 1; and the first semiconductor refrigerator 61 and the second semiconductor refrigerator 62 are both connected to the electric storage module 5.
The first semiconductor refrigerator 61 and the second semiconductor refrigerator 62 are positioned between the evaporator 4 and the compressor 1, the first semiconductor refrigerator 61 is used for refrigerating the refrigerant, a heat exchanger at the cold end of the first semiconductor refrigerator 61 is connected with a system pipeline, and when the suction superheat degree of the refrigerant exceeds a given value, such as 8 ℃, the first semiconductor refrigerator 61 refrigerates the refrigerant, reduces the suction superheat degree of the refrigerant and prevents the pressure of the compressor from exceeding a specified value; the second semiconductor refrigerator 62 is used for heating the refrigerant, the heat exchanger at the hot end of the second semiconductor refrigerator 62 is connected with the system pipeline, and when the suction superheat degree of the refrigerant is lower than a set value, such as 0 ℃, the second semiconductor refrigerator 62 heats the refrigerant, increases the suction superheat degree, and avoids the liquid impact phenomenon of the compressor.
Specifically, when the suction superheat value of the compressor 1 is lower than a first preset value, the second semiconductor refrigerator 62 is communicated with the electricity storage assembly 5, and the second semiconductor refrigerator 62 is operated to heat the refrigerant at this time; when the suction superheat value of the compressor 1 is higher than the second preset value, the first semiconductor refrigerator 61 communicates with the electricity storage assembly 5, and at this time, the first semiconductor refrigerator 61 operates to cool down the refrigerant.
Specifically, the first preset value is 0 ℃ and the second preset value is 8 ℃.
In a specific embodiment:
the power storage assembly 5 includes a semiconductor thermoelectric generator 51 and a storage battery 52, the hot end of the semiconductor thermoelectric generator 51 is located on the air outlet side of the condenser 2, the semiconductor thermoelectric generator 51 is connected to the storage battery 52 and stores electric energy in the storage battery 52, and the storage battery 52 is connected to a first semiconductor refrigerator 61 and a second semiconductor refrigerator 62, respectively, and supplies power to the first semiconductor refrigerator 61 and the second semiconductor refrigerator 62.
Thus, with the above structure, the temperature of the hot side of the semiconductor thermoelectric generator 51 is increased by the heat released from the condenser 2, and electric energy is generated by the temperature difference between the hot side and the cold side of the semiconductor thermoelectric generator 51 and stored in the storage battery 52.
In a specific embodiment:
the electricity storage module 5 further includes a first switch 53 and a second switch 54, the first switch 53 being provided on a circuit in which the battery 52 is connected to the first semiconductor refrigerator 61, the second switch 54 being provided on a circuit in which the battery 52 is connected to the second semiconductor refrigerator 62, the first switch 53 and the second switch 54 being turned on or off in accordance with a suction overheat value of the compressor 1.
Specifically, when the compressor suction superheat value is lower than 0 ℃, the storage battery 52 supplies power to the second semiconductor refrigerator 62, the second switch 54 is closed, the first switch 53 is opened, and the second semiconductor refrigerator 62 heats the refrigerant between the evaporator 4 and the compressor 1, so that the suction superheat reaches a set range.
When the suction superheat value of the compressor is higher than 8 ℃, the storage battery 52 supplies power to the first semiconductor refrigerator 61, the first switch 53 is closed, the second switch 54 is opened, and the first semiconductor refrigerator 61 cools the refrigerant between the evaporator 4 and the compressor 1, so that the suction superheat reaches a set range.
In a specific embodiment:
the hot end of the first semiconductor refrigerator 61 is connected with the hot end of the semiconductor thermoelectric generator 51 through a thermal insulation pipe, and is used for increasing the temperature difference between the hot end and the cold end of the semiconductor thermoelectric generator 51.
The fluid in the heat exchanger at the hot end of the first semiconductor refrigerator 61 is air, and the air flows through the heat exchanger at the hot end of the first semiconductor refrigerator 61 and is heated, and then flows to the hot end of the semiconductor thermoelectric generator 51, so that the temperature of the hot end of the semiconductor thermoelectric generator 51 is increased, the temperature difference between the hot end and the cold end of the semiconductor thermoelectric generator 51 is increased, and the heat productivity of the semiconductor thermoelectric generator 51 is enhanced.
In a specific embodiment:
the refrigeration system further comprises a third semiconductor refrigerator 7, which third semiconductor refrigerator 7 is arranged between the condenser 2 and the throttle valve 3.
The third semiconductor refrigerator 7 is positioned between the condenser 2 and the throttle valve 3, the refrigerant exchanges heat through a heat exchanger at the cold end of the third semiconductor refrigerator 7, and the third semiconductor refrigerator 7 reduces the temperature of the refrigerant before the throttle valve 3 and improves the refrigerating capacity.
In a specific embodiment:
the refrigeration system further comprises a fourth semiconductor refrigerator 8, the fourth semiconductor refrigerator 8 being arranged at the outlet of the evaporator 4.
The fourth semiconductor refrigerator 8 is located at the outlet of the fluid of the evaporator 4, and the fluid and the heat exchanger at the cold end of the fourth semiconductor refrigerator 8 dissipate heat, so that the temperature of indoor air is further reduced, and the refrigerating capacity of the refrigerating system is improved.
In a specific embodiment:
the third semiconductor cooler 7 and the fourth semiconductor cooler 8 are both connected to the electrical storage assembly 5.
In this way, the third semiconductor cooler 7 and the fourth semiconductor cooler 8 can be supplied with electric energy through the electric power stored in the electric storage assembly 5.
In a specific embodiment:
the hot ends of the third semiconductor refrigerator 7 and the fourth semiconductor refrigerator 8 are connected with the hot end of the semiconductor thermoelectric generator 51 through a thermal insulation pipeline, and the hot ends are used for increasing the temperature difference between the hot end and the cold end of the semiconductor thermoelectric generator 51.
The fluid in the heat exchangers at the hot ends of the third semiconductor refrigerator 7 and the fourth semiconductor refrigerator 8 is air, and the air flows through the heat exchangers at the hot ends of the third semiconductor refrigerator 7 and the fourth semiconductor refrigerator 8 and is heated, and then flows to the hot end of the semiconductor thermoelectric generator 51, so that the temperature of the hot end of the semiconductor thermoelectric generator 51 is increased, the temperature difference between the hot end and the cold end of the semiconductor thermoelectric generator 51 is increased, and the heat productivity of the semiconductor thermoelectric generator 51 is enhanced.
In a specific embodiment:
a third switch 71 is provided on a circuit connecting the third semiconductor refrigerator 7 and the electric storage module 5, and a fourth switch 81 is provided on a circuit connecting the fourth semiconductor refrigerator 8 and the electric storage module 5.
When the suction superheat value of the compressor 1 is between the first preset value and the second preset value, that is, when the suction superheat value of the compressor 1 is equal to or greater than 0 and equal to or less than 8 ℃, the third switch 71 and the fourth switch 81 are closed, and the third semiconductor refrigerator 7 and the fourth semiconductor refrigerator 8 are operated to increase the cooling capacity.
In addition, in the present embodiment, the first semiconductor refrigerator 61, the second semiconductor refrigerator 62, the third semiconductor refrigerator 7 and the fourth semiconductor refrigerator 8 operate with electric energy from the storage battery 52 and external electric energy, preferably the electric energy in the storage battery 52, and the external electric energy is selected when the electric energy in the storage battery 52 cannot satisfy the power demand of the first semiconductor refrigerator 61, the second semiconductor refrigerator 62, the third semiconductor refrigerator 7 and the fourth semiconductor refrigerator 8.
And, the electric power in the storage battery 52 is preferentially supplied to the first and second semiconductor refrigerators 61 and 62, and is supplied to the third and fourth semiconductor refrigerators 7 and 8 when the first and second semiconductor refrigerators 61 and 62 do not satisfy the operating conditions, that is, when the suction superheat value of the compressor 1 is between the first and second preset values.
The working process of the refrigeration system provided by the embodiment is as follows:
when the suction superheat value of the compressor is lower than 0 ℃, the storage battery 52 supplies power to the second semiconductor refrigerator 62, the second switch 54 is closed, the first switch 53 is opened, and the second semiconductor refrigerator 62 heats the refrigerant between the evaporator 4 and the compressor 1, so that the suction superheat value reaches a set range.
When the suction superheat value of the compressor is higher than 8 ℃, the storage battery 52 supplies power to the first semiconductor refrigerator 61, the first switch 53 is closed, the second switch 54 is opened, and the first semiconductor refrigerator 61 cools the refrigerant between the evaporator 4 and the compressor 1, so that the suction superheat reaches a set range.
When the suction superheat value of the compressor 1 is between 0 ℃ and 8 ℃, the first switch 53 and the second switch 54 are both opened, the third switch 71 and the fourth switch 81 are closed, and the storage battery 52 supplies power to the third semiconductor refrigerator 7 and the fourth semiconductor refrigerator 8, so that the refrigerating capacity of the system is improved.
Example 2
The present embodiment provides a control method of a refrigeration system, as shown in fig. 3, the control method includes the following steps:
s1, recovering the heat released from the condenser 2 by the electricity storage module 5, and converting the heat into electric energy;
and S2, controlling the working state of the semiconductor refrigeration assembly 6 through electric energy according to the suction superheat value of the compressor 1, so that the suction superheat value meets the preset condition.
In a specific embodiment:
retrieve the heat that condenser 2 released through electric power storage component 5 to convert the heat into electric energy, specifically be:
the temperature of the hot side of the semiconductor thermoelectric generator 51 is raised by the heat released from the condenser 2, and electric energy is generated by the temperature difference between the hot side and the cold side of the semiconductor thermoelectric generator 51 and stored in the storage battery 52.
In a specific embodiment:
according to the suction superheat value of the compressor 1, the working state of the semiconductor refrigeration assembly 6 is controlled by electric energy, and the method specifically comprises the following steps:
when the suction superheat value of the compressor 1 is lower than the first preset value, the second switch 54 is closed, and the second semiconductor refrigerator 62 operates to heat the refrigerant;
when the suction superheat value of the compressor 1 is higher than the second preset value, the first switch 53 is closed, and the first semiconductor refrigerator 61 is operated to cool the refrigerant;
when the suction superheat value of the compressor 1 is between the first preset value and the second preset value, the third switch 71 and the fourth switch 81 are closed, and the third semiconductor refrigerator 7 and the fourth semiconductor refrigerator 8 operate to increase the cooling capacity.
The first preset value is preferably 0 ℃, the second preset value is preferably 8 ℃, in particular:
when the compressor suction superheat value is below 0 ℃, the battery 52 powers the second semiconductor refrigerator 62, the second switch 54 is closed, and the second semiconductor refrigerator 62 heats the refrigerant between the evaporator 4 and the compressor 1.
When the compressor suction superheat value is higher than 8 ℃, the battery 52 supplies power to the first semiconductor refrigerator 61, the first switch 53 is closed, and the first semiconductor refrigerator 61 cools down the refrigerant between the evaporator 4 and the compressor 1.
When the suction superheat value of the compressor 1 is between 0 ℃ and 8 ℃, the third switch 71 and the fourth switch 81 are closed, and the storage battery 52 supplies power to the third semiconductor refrigerator 7 and the fourth semiconductor refrigerator 8, thereby increasing the cooling capacity of the system.
Example 3
The present embodiment provides an air conditioner including the refrigeration system of embodiment 1.
In summary, it is easily understood by those skilled in the art that the advantageous technical features described above can be freely combined and superimposed without conflict.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are still within the scope of the technical solution of the present invention.

Claims (15)

1. A refrigeration system, the refrigeration system includes compressor (1), condenser (2), choke valve (3) and evaporimeter (4), the gas vent of compressor (1) is connected with the entry of condenser (2), the export of condenser (2) is connected with the entry of choke valve (3), the export of choke valve (3) is connected with the entry of evaporimeter (4), the export of evaporimeter (4) is connected with the induction port of compressor (1), its characterized in that:
refrigerating system is still including setting up electric power storage component (5) and the semiconductor refrigeration subassembly (6) of setting between compressor (1) and evaporimeter (4) in condenser (2) air-out side, the heat that condenser (2) release is retrieved in electric power storage component (5) for provide the electric energy for semiconductor refrigeration subassembly (6), semiconductor refrigeration subassembly (6) are used for adjusting the superheat value of breathing in of compressor (1).
2. Refrigeration system according to claim 1, characterized in that the semiconductor refrigeration assembly (6) comprises a first semiconductor refrigerator (61) for cooling down the refrigerant and a second semiconductor refrigerator (62) for heating the refrigerant, the first semiconductor refrigerator (61) and the second semiconductor refrigerator (62) being provided between the evaporator (4) and the compressor (1); and the first semiconductor refrigerator (61) and the second semiconductor refrigerator (62) are both connected with the electric storage assembly (5).
3. Refrigeration system according to claim 2, characterized in that the storage assembly (5) comprises a semiconductor thermoelectric generator (51) and an accumulator (52), the hot end of the semiconductor thermoelectric generator (51) being located on the air outlet side of the condenser (2), the semiconductor thermoelectric generator (51) being connected to the accumulator (52) and storing electrical energy in the accumulator (52), the accumulator (52) being connected to the first semiconductor refrigerator (61) and the second semiconductor refrigerator (62), respectively, and powering the first semiconductor refrigerator (61) and the second semiconductor refrigerator (62).
4. A refrigeration system according to claim 3, characterized in that the electricity storage module (5) further includes a first switch (53) and a second switch (54), the first switch (53) being provided on a circuit in which the battery (52) is connected to the first semiconductor refrigerator (61), the second switch (54) being provided on a circuit in which the battery (52) is connected to the second semiconductor refrigerator (62), the first switch (53) and the second switch (54) being turned on or off in accordance with a suction superheat value of the compressor (1).
5. A refrigeration system according to claim 3 or 4, characterized in that the hot side of the first semiconductor refrigerator (61) is connected to the hot side of the semiconductor thermoelectric generator (51) by a thermally insulated pipe for increasing the temperature difference between the hot and cold sides of the semiconductor thermoelectric generator (51).
6. A refrigeration system according to claim 3 or 4, characterized in that it further comprises a third semiconductor refrigerator (7), which third semiconductor refrigerator (7) is arranged between the condenser (2) and the throttle valve (3).
7. Refrigeration system according to claim 6, characterized in that it further comprises a fourth semiconductor refrigerator (8), said fourth semiconductor refrigerator (8) being arranged at the outlet of the evaporator (4).
8. Refrigeration system according to claim 7, characterized in that the third semiconductor refrigerator (7) and the fourth semiconductor refrigerator (8) are both connected with the electrical storage assembly (5).
9. Refrigeration system according to claim 8, characterized in that the third semiconductor refrigerator (7) and the fourth semiconductor refrigerator (8) are connected to the hot side of the semiconductor thermoelectric generator (51) by thermally insulated pipes for increasing the temperature difference between the hot side and the cold side of the semiconductor thermoelectric generator (51).
10. The refrigeration system according to claim 9, wherein a third switch (71) is provided on a circuit connecting the third semiconductor refrigerator (7) and the electricity storage assembly (5), and a fourth switch (81) is provided on a circuit connecting the fourth semiconductor refrigerator (8) and the electricity storage assembly (5).
11. A control method of a refrigeration system, characterized by comprising the steps of:
recovering heat released by the condenser (2) through the electricity storage component (5) and converting the heat into electric energy;
and controlling the working state of the semiconductor refrigeration assembly (6) through the electric energy according to the suction superheat value of the compressor (1), so that the suction superheat value meets a preset condition.
12. Control method of a refrigeration system according to claim 11, characterized in that the heat released by the condenser (2) is recovered by the accumulator assembly (5) and converted into electric energy, in particular:
the temperature of the hot end of the semiconductor thermoelectric generator (51) is increased through the heat released by the condenser (2), and further electric energy is generated through the temperature difference between the hot end and the cold end of the semiconductor thermoelectric generator (51) and is stored in the storage battery (52).
13. Control method of a refrigeration system according to claim 11 or 12, characterized in that the operating state of the semiconductor refrigeration assembly (6) is controlled by the electric energy according to the value of the superheat of the suction of the compressor (1), in particular:
when the suction superheat value of the compressor (1) is lower than a first preset value, the second switch (54) is closed, and the second semiconductor refrigerator (62) works to heat the refrigerant;
when the suction superheat value of the compressor (1) is higher than a second preset value, the first switch (53) is closed, and the first semiconductor refrigerator (61) works to cool the refrigerant.
14. The control method of the refrigeration system as set forth in claim 13, further comprising:
when the suction superheat value of the compressor (1) is between the first preset value and the second preset value, the third switch (71) and the fourth switch (81) are closed, and the third semiconductor refrigerator (7) and the fourth semiconductor refrigerator (8) work to improve the cooling capacity.
15. An air conditioner characterized in that it comprises a refrigeration system according to any one of claims 1 to 10.
CN202111355072.4A 2021-11-16 2021-11-16 Refrigerating system, control method and air conditioner Pending CN114111100A (en)

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