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CN-224201913-U - Non-azeotropic mixed working medium heat pump system

CN224201913UCN 224201913 UCN224201913 UCN 224201913UCN-224201913-U

Abstract

The utility model relates to the technical field of heat pumps and discloses a non-azeotropic mixed working medium heat pump system which comprises a compressor and a refrigerant circulation loop which is connected with the compressor and respectively forms a loop, wherein the refrigerant circulation loop is sequentially provided with a condenser, a first throttling device, a liquid storage device and an evaporator along the refrigerant flow direction, the liquid storage device is provided with a refrigerant inlet, a first refrigerant outlet and a second refrigerant outlet, the refrigerant inlet is connected with the first throttling device, the first refrigerant outlet is connected with the inlet of the evaporator, the second refrigerant outlet is connected with the inlet of the evaporator through a bypass pipeline, and an electric control valve is arranged on the bypass pipeline. The low boiling point component in the gaseous working medium in the heat pump system is larger, namely the refrigerant component actually participating in the whole defrosting cycle is larger, so that the high pressure in the defrosting cycle is improved, the mass flow is increased, and finally the work of the compressor is larger, namely the condensing heat dissipation capacity of defrosting of the evaporator is larger, thereby improving the defrosting effect of the non-azeotropic mixed working medium heat pump system.

Inventors

  • WANG CHUANHUA
  • JIANG LEI

Assignees

  • 广东万和电气有限公司

Dates

Publication Date
20260505
Application Date
20250430

Claims (10)

  1. 1. A zeotropic mixed working medium heat pump system, comprising: The device comprises a compressor (1) and a refrigerant circulation loop which is connected with the compressor (1) and forms a loop, wherein a condenser (2), a first throttling device (3), a liquid reservoir (4) and an evaporator (8) are sequentially arranged on the refrigerant circulation loop along the refrigerant flow direction; The liquid storage device is characterized in that the liquid storage device (4) is provided with a refrigerant inlet (42), a first refrigerant outlet (43) and a second refrigerant outlet (44), the refrigerant inlet (42) is connected with the first throttling device (3), the first refrigerant outlet (43) is connected with an inlet of the evaporator (8), the second refrigerant outlet (44) is connected with an inlet of the evaporator (8) through a bypass pipeline (41), and an electric control valve (5) is arranged on the bypass pipeline (41).
  2. 2. The zeotropic refrigerant heat pump system of claim 1, further comprising: The heat regenerator (6) is provided with a first heat exchange channel (61) and a second heat exchange channel (62) which exchange heat with each other, the first heat exchange channel (61) is connected between the first refrigerant outlet (43) and the inlet of the evaporator (8), and the second heat exchange channel (62) is connected between the outlet of the evaporator (8) and the air return port of the compressor (1); -a second throttling device (7), said second throttling device (7) being interposed between the outlet of said first heat exchange channel (61) and the inlet of said evaporator (8).
  3. 3. The zeotropic mixed working medium heat pump system according to claim 2, wherein the first throttling device (3) and the second throttling device (7) are expansion valves.
  4. 4. The zeotropic mixed working medium heat pump system according to claim 2, wherein the first throttling device (3) and the second throttling device (7) are both combined structures of an expansion valve and an electromagnetic valve.
  5. 5. The zeotropic refrigerant heat pump system according to any one of claims 1 to 4, wherein a gas-liquid separator (9) is further provided on the refrigerant circulation circuit, the gas-liquid separator (9) being provided near a return air port of the compressor (1).
  6. 6. The zeotropic refrigerant heat pump system according to any one of claims 1 to 4, further comprising an evaporator fan (10), the evaporator fan (10) being adapted to drive air through the evaporator (8).
  7. 7. The zeotropic refrigerant heat pump system according to claim 1, wherein the first refrigerant outlet (43) is provided at the bottom of the accumulator (4), and the second refrigerant outlet (44) is provided at the top of the accumulator (4).
  8. 8. The zeotropic mixed working medium heat pump system according to claim 1, wherein the condenser (2) is a plate heat exchanger, the condenser (2) is provided with a first channel for circulating refrigerant and a second channel for circulating water, the first channel is connected with the refrigerant circulation loop, and two ends of the second channel are used for connecting a water device.
  9. 9. The zeotropic refrigerant heat pump system of claim 1, further comprising: the first temperature sensor is used for collecting the ambient temperature; a second temperature sensor for detecting the outlet temperature of the evaporator (8); And the controller is electrically connected with the first temperature sensor and the second temperature sensor respectively.
  10. 10. The zeotropic mixed working medium heat pump system according to claim 9, wherein the controller is further electrically connected with the electric control valve (5) and the first throttling device (3), respectively, and the controller is used for controlling the on-off of the electric control valve (5) and controlling the opening degree of the first throttling device (3) according to the comparison result of the ambient temperature and the outlet temperature of the evaporator (8).

Description

Non-azeotropic mixed working medium heat pump system Technical Field The utility model relates to the technical field of heat pumps, in particular to a non-azeotropic mixed working medium heat pump system. Background With the development of technology and the improvement of living standard of people, the heat pump technology is increasingly widely applied in the fields of families and industry. Because the heat source and heat sink temperature change range in the heat pump system is larger, the traditional single working medium is difficult to meet the use requirements, such as ultra-low ring temperature heating in the building field and ultra-high water temperature heating in the industrial field. The non-azeotropic mixed working medium can flexibly select the components and the proportion of the working medium according to application occasions and enlarge the temperature difference between a heat source and a heat sink, thereby being suitable for the large-temperature-span requirement of specific application occasions. However, when the zeotropic mixed working medium is applied to a traditional heat pump system, reverse defrosting is usually carried out by means of a four-way valve, so that the problems of complex flow path and low defrosting efficiency of the heat pump system are caused. Disclosure of utility model The utility model aims to provide a non-azeotropic mixed working medium heat pump system which effectively solves the technical problem of low defrosting efficiency when the non-azeotropic mixed working medium is applied to a heat pump. The technical problems are solved by the following technical scheme: a zeotropic mixed refrigerant heat pump system comprising: The device comprises a compressor and a refrigerant circulation loop which is connected with the compressor and respectively forms loops, wherein the refrigerant circulation loop is sequentially provided with a condenser, a first throttling device, a liquid reservoir and an evaporator along the refrigerant flow direction; The liquid reservoir is provided with refrigerant import, first refrigerant export and second refrigerant export, the refrigerant import with first throttling arrangement is connected, first refrigerant export with the inlet connection of evaporimeter, the second refrigerant export through bypass line with the inlet connection of evaporimeter, be provided with the electrically controlled valve on the bypass line. Compared with the background technology, the non-azeotropic mixed working medium heat pump system has the advantages that when the non-azeotropic mixed working medium heat pump system is used for defrosting, the electric control valve is opened, the opening of the first throttling device is the largest, the non-azeotropic mixed working medium is discharged from the compressor and enters the condenser for cooling, the cooled non-azeotropic mixed working medium enters the first throttling device for throttling, the throttled non-azeotropic mixed working medium enters the liquid storage device, most of gaseous working medium is discharged from the second refrigerant outlet and enters the bypass pipeline, is conveyed to the evaporator for condensation through the electric control valve, and then returns to the compressor for defrosting circulation. In the defrosting cycle, the opening degree of the first throttling device is adjusted to be maximum, the throttling effect is poor, the temperature of the zeotropic mixed working medium is still higher and the temperature is higher after flowing through the first throttling device, most of the low-boiling working medium is gaseous, a large amount of heat is released to defrost when the gaseous working medium is condensed in an evaporator, according to the characteristic of the zeotropic mixed working medium, the low-boiling components in the gaseous working medium occupy a larger proportion, namely the refrigerant components actually participating in the whole defrosting cycle occupy a larger proportion compared with the low-boiling components in the heating cycle, and the density of the low-boiling working medium is higher than that of the high-boiling working medium, so that the working medium high pressure in the defrosting cycle is improved, the mass flow is increased, and finally the working medium acting of a compressor is larger, namely the condensing heat dissipating capacity of defrosting of the evaporator is larger, thereby effectively improving the defrosting effect of the zeotropic mixed working medium heat pump system, and the four-way valve is not needed to perform reverse heat defrosting, thereby simplifying the flow path of the zeotropic mixed working medium heat pump system and reducing the cost. In one embodiment, the method further comprises: The heat regenerator is provided with a first heat exchange channel and a second heat exchange channel which exchange heat with each other, the first heat exchange channel is connected between the first refrig