CN210717775U - Wide-ring-temperature multi-stage water outlet variable-frequency air energy cascade heat engine system - Google Patents
Wide-ring-temperature multi-stage water outlet variable-frequency air energy cascade heat engine system Download PDFInfo
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- CN210717775U CN210717775U CN201921930061.2U CN201921930061U CN210717775U CN 210717775 U CN210717775 U CN 210717775U CN 201921930061 U CN201921930061 U CN 201921930061U CN 210717775 U CN210717775 U CN 210717775U
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Abstract
The utility model provides a wide ring temperature multistage play water frequency conversion air can overlapping formula heat engine system, including low temperature level system and high temperature level system, wherein, low temperature level system includes low temperature level R22 frequency conversion compressor, cross valve, evaporative condenser, low temperature level condenser, reservoir, low temperature economic ware, low temperature level expansion valve, low temperature level evaporimeter, vapour and liquid separator, low temperature level electronic expansion valve, axial fan, tee bend proportion governing valve, oil return ware. The utility model discloses can adapt to ambient temperature and keep on temperature from minus 30 ℃ to minus 40 ℃ and go out the water of three kinds of temperatures of low crowning. The utility model discloses a heat engine system is formed by low temperature level system and high temperature level system overlapping, opens the final required leaving water temperature requirement of realizing of the correlation between mode and the intersystem through the difference.
Description
Technical Field
The utility model relates to a heat engine system, concretely relates to multistage play water frequency conversion air of wide ring temperature can overlapping formula heat engine system.
Background
The state advocates the use of new energy to replace the existing coal-fired and oil-fired boilers so as to realize green environmental protection, and the popularization and use of the air source are going on in a very fierce way. However, in winter in the north, according to different thermal fields, water for floor heating, water for radiators and water for old heat supply network reconstruction systems, 35 ℃, 55 ℃ and 80 ℃ water needs to be provided respectively, while general machines cannot meet three water temperatures, and a heat engine system which can adapt to the environmental temperature and can continuously provide water with three water temperatures of low, medium and high from zero to zero needs to be provided.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a wide ring temperature multistage play water frequency conversion air can cascade heat engine system, open through the difference and stop mode and intersystem correlation and finally realize required leaving water temperature requirement, can adapt to ambient temperature from minus 30 ℃ to minus 40 ℃ last temperature and have the water of three kinds of temperatures in low or high.
In order to solve the above technical problems, an embodiment of the present invention provides a wide-ambient-temperature multi-stage water-outlet frequency-conversion air energy cascade heat engine system, which includes a low-temperature-stage system and a high-temperature-stage system, wherein,
the low-temperature stage system comprises a low-temperature stage R22 variable frequency compressor, a four-way valve, an evaporative condenser, a low-temperature stage condenser, a liquid storage device, a low-temperature economizer, a low-temperature stage expansion valve, a low-temperature stage evaporator, a gas-liquid separator, a low-temperature stage electronic expansion valve, an axial flow fan, a three-way proportional control valve and an oil return device, wherein the outlet of the low-temperature stage R22 variable frequency compressor is connected with the gas-liquid separator, the outlet of the gas-liquid separator is connected with a first valve port of the four-way valve, a second valve port of the four-way valve is connected with the low-temperature stage evaporator, a third valve port of the four-way valve is connected with the inlet of the oil return device, a fourth valve port of the four-way valve is connected with the first valve port of the three-way;
an outlet of the oil return device is connected with an oil return port of the low-temperature R22 frequency conversion compressor, and an axial flow fan is arranged on the low-temperature evaporator;
the inlet of the low-temperature stage R22 variable frequency compressor is connected with a low-temperature economizer, the inlet of the low-temperature economizer is connected with a liquid storage device, and the outlet of the low-temperature economizer is connected with a low-temperature stage evaporator through a low-temperature stage expansion valve;
the outlet of the low-temperature-level condenser is connected with a first valve port of a three-way proportional control valve, and a second valve port of the three-way proportional control valve is connected with the inlet of a liquid reservoir;
and the third valve port of the three-way proportional control valve is connected with the first water inlet of the low-temperature-level condenser, and the third valve port of the three-way proportional control valve is connected with the second water inlet of the low-temperature-level condenser.
The high-temperature-stage system comprises a high-temperature-stage R134a frequency conversion compressor, a four-way valve, a high-temperature-stage condenser, a liquid storage device, a high-temperature-stage economizer, an economizer electronic expansion valve, a high-temperature-stage electronic expansion valve and a gas-liquid separator, wherein the outlet of the high-temperature-stage R134a frequency conversion compressor is connected with a first valve port of the four-way valve through the gas-liquid separator, a second valve port of the four-way valve is connected with the high-temperature-stage condenser, and high-temperature-stage refrigerant of the high;
after the high-temperature-level refrigerant in the liquid reservoir enters the high-temperature-level economizer, a small part of the high-temperature-level refrigerant enters an air supply loop, enters the high-temperature-level economizer again after being throttled and depressurized by the high-temperature-level electronic expansion valve, and enters an air supply suction inlet of the high-temperature-level R134a variable-frequency compressor after being evaporated and subjected to heat absorption;
most of the air flows into an evaporative condenser after being throttled by a high-temperature electronic expansion valve;
the outlet of the evaporative condenser is connected with the third valve port of the four-way valve, and the fourth valve port of the four-way valve is connected with the first inlet of the high-temperature R134a variable-frequency compressor;
and the high-temperature-stage condenser is provided with a high-temperature-stage water inlet and a high-temperature-stage water outlet.
The working method of the wide-ring-temperature multi-stage water outlet variable-frequency air energy cascade heat engine system comprises a low-water-temperature operation action, a medium-water-temperature operation action and a high-water-temperature operation action, wherein the low-water-temperature operation action is taken as follows: the water temperature requires 35 ℃, and after a set program, the heat engine system only starts a heating mode: starting the low-temperature system, enabling the high-temperature system to be in a standby state, directly heating circulating water obtained by floor heating to a set temperature value through a low-temperature condenser of the low-temperature system, and performing circulating action;
the specific process is as follows: high-temperature refrigerant gas flowing out of the low-temperature-stage R22 frequency conversion compressor passes through the four-way valve and then completely enters the low-temperature-stage condenser under the action of the three-way proportional control valve to raise the temperature of floor backwater, low-temperature refrigerant liquid in the low-temperature-stage condenser enters the liquid storage device after being condensed, the low-temperature refrigerant liquid in the liquid storage device enters the low-temperature-stage economizer, flows into the low-temperature-stage evaporator after being throttled by the low-temperature-stage electronic expansion valve, is evaporated and absorbed in the low-temperature-stage evaporator to become high-temperature refrigerant gas, and then flows back to the low-temperature-stage R22 frequency conversion compressor through.
Wherein the medium water temperature operation acts as: for a thermal field for a heating radiator, the required temperature is 50-58 ℃, and the water is condensed and discharged by mixing a low-temperature stage and a high-temperature stage to finally meet the design temperature requirement; the medium water temperature operation action comprises a process a and a process b, wherein,
the specific process of the process a is as follows: when the ambient temperature reduces to subzero, the low-temperature system opens the air supply loop, and a part of refrigerant liquid enters the economizer, increases the supercooling degree of the refrigerant liquid in the system, thereby promoting the heating capacity, and the specific flow is as follows: high-temperature refrigerant gas flowing out of the low-temperature-stage R22 variable-frequency compressor passes through the four-way valve, then enters the low-temperature-stage condenser to return water to the floor for heating under the action of the three-way proportional control valve, enters the evaporation condenser, condenses low-temperature refrigerant in the evaporation condenser and the low-temperature-stage condenser, enters the liquid reservoir, enters the low-temperature-stage economizer after entering the low-temperature-stage economizer, throttles by the low-temperature-stage electronic expansion valve, evaporates and absorbs heat in the low-temperature-stage evaporator to become high-temperature refrigerant gas, and returns to the low-temperature-stage R22 variable-frequency compressor through the four-way valve and the gas-liquid separator;
the specific process of the process b is as follows: high-temperature refrigerant gas discharged from the high-temperature-stage R134a frequency conversion compressor enters a high-temperature-stage condenser through a four-way valve, condensed low-temperature refrigerant liquid enters a liquid storage device and then enters a high-temperature-stage economizer, and then a part of the condensed low-temperature refrigerant liquid is throttled and decompressed by a high-temperature-stage electronic expansion valve, enters an evaporative condenser and an economizer circuit to be evaporated into gas and then returns to the high-temperature-stage R134a frequency conversion compressor through the four-way valve and a gas;
merging the flow a and the flow b:
the flow rate distributed to the evaporative condenser and the low-temperature condenser is adjusted by adjusting a three-way proportional control valve and a three-way proportional control valve in the low-temperature system, and low-temperature hot water produced by the low-temperature condenser and high-temperature hot water produced by the high-temperature condenser are mixed and then are changed into hot water of 50-58 ℃ and then are sent to a heat-using place.
Wherein the high water temperature operation acts as: when the ring temperature is low and the low-temperature level can not meet the requirement of the outlet water at 80 ℃, the set requirement can be met and the stable operation can be achieved only by the cascade operation of the low-temperature level system and the high-temperature level system, at the moment, the starting process of the heat engine system is set to start the loop of the low-temperature level system firstly and then start the loop of the high-temperature level system, and the condensation heat in the low-temperature level system is transferred to the high-temperature level system through the evaporative condenser.
When the flow paths a and b are combined, the load of the low-temperature-level condenser inside the unit is increased when the ambient temperature rises, and the low-temperature economizer 2-5 can be started to achieve the purpose of internal unloading when the frequency is reduced and the requirement cannot be met.
Further, when the climate is warmed, the operating frequency of a compressor in the low-temperature stage system is reduced, so that the evaporation and condensation load of the system is reduced to achieve the purpose of certain energy balance; when the system meets severe cold weather, the air supply loop in the low-temperature system is opened, and the enthalpy value of refrigerant liquid in the system is increased, so that the effect of increasing the heating capacity is achieved; and meanwhile, the frequency of the high-temperature stage compressor and the low-temperature stage compressor is increased, and the mass flow rate of the system refrigerant is directly increased by increasing the frequency, so that the heat exchange efficiency is increased to achieve the purpose of increasing the heat exchange quantity.
The utility model discloses an above-mentioned technical scheme's beneficial effect as follows:
the utility model discloses can adapt to ambient temperature and keep on temperature from minus 30 ℃ to minus 40 ℃ and go out the water of three kinds of temperatures of low crowning. The utility model discloses a heat engine system is formed by low temperature level system and high temperature level system overlapping, opens the final required leaving water temperature requirement of realizing of the correlation between mode and the intersystem through the difference.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic flow chart of the operation at a low and medium water temperature according to the present invention;
FIG. 3 is a schematic flow chart of a process a in the medium water temperature operation of the present invention;
FIG. 4 is a schematic flow chart of the flow b in the medium water temperature operation of the present invention;
fig. 5 is a schematic flow chart showing the combination of the flow a and the flow b in the medium water temperature operation of the present invention.
Description of reference numerals:
1-1, a low-temperature stage R22 variable frequency compressor; 1-2, a four-way valve; 1-3-1, an evaporative condenser; 1-3-2, low-temperature grade condenser; 1-4, a liquid reservoir; 1-5, a low-temperature economizer; 1-6, low-temperature grade expansion valve; 1-7, a low-temperature grade evaporator; 1-8, a gas-liquid separator; 1-9, low-temperature electronic expansion valve; 1-10, axial flow fan; 1-11, three-way proportional control valve; 1-12, three-way proportional control valve; 1-13, an oil return device; 2-1, a high-temperature stage R134a variable frequency compressor; 2-2, a four-way valve; 2-3, a high-temperature-level condenser; 2-4, a liquid reservoir; 2-5, high-temperature-grade economizer; 2-6, an electronic expansion valve of the economizer; 2-7, high-temperature electronic expansion valve; 2-8 and a gas-liquid separator.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the utility model provides a wide-ring-temperature multi-stage water-outlet variable-frequency air energy cascade heat engine system, which finally realizes the multi-functional use of the unit by changing the action logic inside the system according to the difference of the temperature requirements needed by the heat-using place, including a low-temperature system and a high-temperature system,
the low-temperature stage system comprises a low-temperature stage R22 variable-frequency compressor 1-1, a four-way valve 1-2, an evaporative condenser 1-3-1, a low-temperature stage condenser 1-3-2, a liquid storage device 1-4, a low-temperature economizer 1-5, a low-temperature stage expansion valve 1-6, a low-temperature stage evaporator 1-7, a gas-liquid separator 1-8, a low-temperature stage electronic expansion valve 1-9, an axial flow fan 1-10, a three-way proportional regulating valve 1-11/1-12 and an oil return device 1-13, wherein an outlet of the low-temperature stage R22 variable-frequency compressor 1-1 is connected with a first valve port of the four-way valve 1-2 through the gas-liquid separator 1-8, a second valve port of the four-way valve 1-2 is connected with the evaporative condenser 1-3-1 and the low-temperature stage condenser 1-3-2 Connecting;
the low-temperature-level refrigerant flowing out of the evaporative condenser 1-3-1 and the low-temperature-level condenser 1-3-2 enters the liquid storage device 1-4 under the confluence of a three-way proportional regulating valve 1-11;
after the low-temperature-level refrigerant in the liquid reservoir 1-4 enters the low-temperature-level economizer 1-5, a small part of the low-temperature-level refrigerant enters an air supply loop, is throttled and depressurized by the low-temperature-level electronic expansion valve 1-9 and then enters the low-temperature-level economizer 1-5 again, and enters the air supply suction inlet of the low-temperature-level R22 variable-frequency compressor 1-1 after evaporation and heat absorption;
most of the air flows into a low-temperature-stage evaporator 1-7 after being throttled by a low-temperature-stage electronic expansion valve 1-6;
a third valve port of the four-way valve 1-2 is connected with an oil return port of the low-temperature stage R22 variable frequency compressor 1-1 through an oil return device 1-13, and a fourth valve port of the four-way valve 1-2 is connected with a low-temperature stage evaporator 1-7;
the low-temperature-stage evaporator 1-7 is provided with an axial flow fan 1-10;
and the low-temperature-stage condenser 1-3-2 is provided with a low-temperature-stage water inlet and a low-temperature-stage water outlet.
The low-temperature stage R22 variable frequency compressor, the four-way valve, the evaporative condenser, the low-temperature stage condenser, the liquid storage device, the low-temperature economizer, the low-temperature stage expansion valve, the low-temperature stage evaporator, the gas-liquid separator, the low-temperature stage electronic expansion valve, the axial flow fan, the three-way proportional control valve and the oil return device are all conventional products which are commercially available.
The high-temperature-stage system comprises a high-temperature-stage R134a variable-frequency compressor 2-1, a four-way valve 2-2, a high-temperature-stage condenser 2-3, a liquid storage device 2-4, a high-temperature-stage economizer 2-5, an economizer electronic expansion valve 2-6, a high-temperature-stage electronic expansion valve 2-7 and a gas-liquid separator 2-8, wherein an outlet of the high-temperature-stage R134a variable-frequency compressor 2-1 is connected with a first valve port of the four-way valve 2-2 through the gas-liquid separator 2-8, a second valve port of the four-way valve 1-2 is connected with the high-temperature-stage condenser 2-3, and a high-temperature-stage refrigerant of the high-;
after the high-temperature-level refrigerant in the liquid reservoir 2-4 enters the high-temperature-level economizer 2-5, a small part of the high-temperature-level refrigerant enters an air supply loop, is throttled and depressurized by the high-temperature-level electronic expansion valve 2-6 and then enters the high-temperature-level economizer 2-5 again, and enters an air supply suction inlet of the high-temperature-level R134a variable-frequency compressor 2-1 after evaporation and heat absorption;
most of the air flows into an evaporative condenser 1-3-1 after being throttled by a high-temperature electronic expansion valve 2-7;
the outlet of the evaporative condenser 1-3-1 is connected with the third valve port of the four-way valve 2-2, and the fourth valve port of the four-way valve 2-2 is connected with the first inlet of the high-temperature R134a variable-frequency compressor 2-1;
and the high-temperature-stage condenser 2-3 is provided with a high-temperature-stage water inlet and a high-temperature-stage water outlet.
The high-temperature-level R134a variable-frequency compressor, the four-way valve, the high-temperature-level condenser, the liquid storage device, the high-temperature-level economizer, the economizer electronic expansion valve, the high-temperature-level electronic expansion valve and the gas-liquid separator are all conventional products which are commercially available.
The working method of the wide-ring-temperature multi-stage water outlet variable-frequency air energy cascade heat engine system comprises a low-water-temperature operation action, a medium-water-temperature operation action and a high-water-temperature operation action, wherein the low-water-temperature operation action is taken as follows: the operation mode is more suitable for newly-built thermal fields with better heat preservation performance, and when a client needs to be used for floor heating, the requirement of water temperature is about 35 ℃ (the heating industry has standards, and the floor heating temperature is 35 ℃). The system only starts the heating mode through a set program: the low-temperature stage is started, the high-temperature stage is in a standby state, circulating water heated by the floor is directly heated to a set temperature value through a condenser of the low-temperature stage, and the circulating water is circulated in this way. When the ambient temperature continuously decreases, the unit starts the frequency increasing mode to increase the heating capacity of the system.
The specific process is as follows: high-temperature refrigerant gas flowing out of a low-temperature stage R22 frequency conversion compressor 1-1 passes through a four-way valve 1-2 and then enters a low-temperature stage condenser 1-3-2 under the action of a three-way proportional regulating valve 1-12 to raise the temperature of floor backwater, after low-temperature stage refrigerant in the low-temperature stage condenser 1-3-2 is condensed, the low-temperature refrigerant liquid enters the liquid storage device 1-4, after the low-temperature refrigerant liquid in the liquid storage device 1-4 enters the low-temperature-level economizer 1-5, flows into a low-temperature evaporator 1-7 after being throttled by a low-temperature electronic expansion valve 1-6, the refrigerant gas is evaporated and absorbed heat in the low-temperature evaporator 1-7 and is changed into high-temperature refrigerant gas, and the high-temperature refrigerant gas flows back to the low-temperature R22 inverter compressor 1-1 through the four-way valve 1-2 and the gas-liquid separator 1-8. . Flow diagram as shown in fig. 2, the low-temperature stage electronic expansion valve 1-9 in fig. 2 mainly functions to throttle and depressurize a part of refrigerant branched from the main refrigerant path and then enter the low-temperature stage economizer 1-5 to evaporate and absorb heat during operation.
The medium water temperature operation acts as: for a thermal field for a heating radiator, the required temperature is 50-58 ℃, and the water is condensed and discharged by mixing a low-temperature stage and a high-temperature stage to finally meet the design temperature requirement; the medium water temperature operation action comprises a process a and a process b, wherein,
the specific process of the process a is as follows: when the ambient temperature is reduced to below zero, the low-temperature system starts a gas supplementing loop, a part of refrigerant liquid enters the economizer 1-5, and the supercooling degree of the refrigerant liquid in the system is increased, so that the heating capacity is improved, and the specific flow is as follows: high-temperature refrigerant gas flowing out of a low-temperature stage R22 frequency conversion compressor 1-1 passes through a four-way valve 1-2, then enters a low-temperature stage condenser 1-3-2 to return water to a floor for heating under the action of a three-way proportional control valve 1-12, the other part enters an evaporation condenser 1-3-1, low-temperature refrigerant liquid in the evaporation condenser 1-3-1 and the low-temperature stage condenser 1-3-2 is condensed, then enters a liquid storage device 1-4, low-temperature refrigerant liquid in the liquid storage device 1-4 enters a low-temperature stage economizer 1-5, then enters a low-temperature stage evaporator 1-7 after being throttled by a low-temperature stage electronic expansion valve 1-6, is evaporated and absorbs heat in the low-temperature stage evaporator 1-7 to become high-temperature refrigerant gas, and the high-temperature refrigerant gas returns to a low temperature through the four-way valve 1-2 and stage R22 inverter compressor 1-1. The flow chart is shown in fig. 3.
The specific flow of the flow b is that high-temperature refrigerant gas discharged from a high-temperature R134a frequency conversion compressor 2-1 enters a high-temperature condenser 2-3 through a four-way valve 2-2, condensed low-temperature refrigerant liquid enters a liquid storage device 2-4 and then enters a high-temperature economizer 2-5, and then a part of the condensed low-temperature refrigerant liquid is throttled and depressurized through a high-temperature electronic expansion valve 2-7 and enters an evaporative condenser 1-3-1 and an economizer loop to be evaporated into gas, and then the gas returns to the high-temperature R134a frequency conversion compressor 2-1 through the four-way valve 1-2 and a gas-liquid separator 1-8. The flow chart is shown in fig. 4.
Merging the flow a and the flow b:
the flow rates distributed to the evaporative condenser 1-3-1 and the low-temperature condenser 1-3-2 are adjusted by adjusting a three-way proportional adjusting valve 1-11 and a three-way proportional adjusting valve 1-12 in the low-temperature system, and low-temperature hot water produced by the low-temperature condenser 1-3-2 and high-temperature hot water produced by the high-temperature condenser 2-3 are mixed to form hot water at the temperature of 50-58 ℃ and then are sent to a heat utilization place. When the environmental temperature rises, the load of the low-temperature-stage condenser inside the unit becomes large, and when the reduction frequency still cannot meet the requirement, the purpose of internal unloading can be achieved by starting the low-temperature economizer 2-5. The flow chart is shown in fig. 5.
The high water temperature operation acts as: when the ring temperature is low and the low-temperature level can not meet the requirement of the outlet water at 80 ℃, the set requirement can be met and the high-temperature level system can stably run only by the cascade operation of the low-temperature level system and the high-temperature level system, at the moment, the starting process of the heat engine system is set to start the loop of the low-temperature level system firstly and then start the loop of the high-temperature level system, and the condensation heat in the low-temperature level system is transferred to the high-temperature level system through the evaporative condenser 1-3-1, so that the reliability and the stability of the operation of the high-temperature level system at the low. When the climate is warmed, the operation frequency of a compressor in the low-temperature stage system is reduced, so that the evaporation and condensation load of the system is reduced to achieve the purpose of certain energy balance; when the system meets severe cold weather, the air supply loop in the low-temperature system is opened, and the enthalpy value of refrigerant liquid in the system is increased, so that the effect of increasing the heating capacity is achieved; and meanwhile, the frequency of the high-temperature stage compressor and the low-temperature stage compressor is increased, and the mass flow rate of the system refrigerant is directly increased by increasing the frequency, so that the heat exchange efficiency is increased to achieve the purpose of increasing the heat exchange quantity. In addition, the compressor can safely operate and stably output under the working condition of a great compression ratio.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (2)
1. A wide-ring-temperature multi-stage water outlet variable-frequency air energy cascade heat engine system is characterized by comprising a low-temperature-stage system and a high-temperature-stage system, wherein,
the low-temperature stage system comprises a low-temperature stage R22 variable frequency compressor, a four-way valve, an evaporative condenser, a low-temperature stage condenser, a liquid storage device, a low-temperature economizer, a low-temperature stage expansion valve, a low-temperature stage evaporator, a gas-liquid separator, a low-temperature stage electronic expansion valve, an axial flow fan, a three-way proportional control valve and an oil return device, wherein an outlet of the low-temperature stage R22 variable frequency compressor is connected with a first valve port of the four-way valve through the gas-liquid separator, and a second valve port of the four-way valve is connected with the evaporative condenser and the low-temperature stage condenser;
the low-temperature-level refrigerant flowing out of the evaporative condenser and the low-temperature-level condenser enters a liquid storage device under the confluence of a three-way proportional regulating valve;
after entering a low-temperature-stage economizer, a small part of the low-temperature-stage refrigerant in the liquid reservoir enters an air supplementing loop, enters the low-temperature-stage economizer again after being throttled and depressurized by a low-temperature-stage electronic expansion valve, and enters a low-temperature-stage R22 variable-frequency compressor air supplementing suction inlet after being evaporated and absorbed heat;
most of the low-temperature-stage electronic expansion valve throttles the low-temperature-stage electronic expansion valve and then flows into the low-temperature-stage evaporator;
a third valve port of the four-way valve is connected with an oil return port of the low-temperature R22 frequency conversion compressor through an oil return device, and a fourth valve port of the four-way valve is connected with the low-temperature evaporator;
an axial flow fan is arranged on the low-temperature evaporator;
and the low-temperature stage condenser is provided with a low-temperature stage water inlet and a low-temperature stage water outlet.
2. The wide-ring-temperature multi-stage effluent variable-frequency air energy cascade heat engine system according to claim 1, wherein the high-temperature-stage system comprises a high-temperature-stage R134a variable-frequency compressor, a four-way valve, a high-temperature-stage condenser, a liquid accumulator, a high-temperature-stage economizer, an economizer electronic expansion valve, a high-temperature-stage electronic expansion valve and a gas-liquid separator, wherein an outlet of the high-temperature-stage R134a variable-frequency compressor is connected with a first valve port of the four-way valve through the gas-liquid separator, a second valve port of the four-way valve is connected with the high-temperature-stage condenser, and high-temperature-;
after the high-temperature-level refrigerant in the liquid reservoir enters the high-temperature-level economizer, a small part of the high-temperature-level refrigerant enters an air supply loop, enters the high-temperature-level economizer again after being throttled and depressurized by the high-temperature-level electronic expansion valve, and enters an air supply suction inlet of the high-temperature-level R134a variable-frequency compressor after being evaporated and subjected to heat absorption;
most of the air flows into an evaporative condenser after being throttled by a high-temperature electronic expansion valve;
the outlet of the evaporative condenser is connected with the third valve port of the four-way valve, and the fourth valve port of the four-way valve is connected with the first inlet of the high-temperature R134a variable-frequency compressor;
and the high-temperature-stage condenser is provided with a high-temperature-stage water inlet and a high-temperature-stage water outlet.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110701664A (en) * | 2019-11-11 | 2020-01-17 | 江苏天舒电器有限公司 | Wide-ring-temperature multi-stage water outlet variable-frequency air energy cascade type heat engine system and working method thereof |
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| CN110701664A (en) * | 2019-11-11 | 2020-01-17 | 江苏天舒电器有限公司 | Wide-ring-temperature multi-stage water outlet variable-frequency air energy cascade type heat engine system and working method thereof |
| CN110701664B (en) * | 2019-11-11 | 2023-05-05 | 江苏天舒电器有限公司 | Wide-ring-temperature multistage water outlet variable-frequency air energy cascade heat engine system and working method thereof |
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