Search

CN-121993924-A - Heat pump circulation system and air conditioner

CN121993924ACN 121993924 ACN121993924 ACN 121993924ACN-121993924-A

Abstract

The invention discloses a heat pump circulation system and an air conditioner, and relates to the technical field of heat pump heating and ventilation, wherein the heat pump circulation system comprises a refrigeration branch, a heating branch and a driving branch, the refrigeration branch comprises an evaporator and a first compressor which are sequentially connected, the heating branch comprises a second compressor and a condenser which are sequentially connected, the driving branch comprises a first valve body and an expander which are sequentially connected, the first valve body is positioned on a passage between the condenser and the expander, the expander is connected with the first compressor, the evaporator is provided with a temperature sensor, the temperature sensor is electrically connected with the first valve body, and the temperature sensor is used for detecting the temperature outside the evaporator and feeding back detection data to the first valve body so as to adjust the opening degree of the first valve body. The technical scheme provided by the invention can solve the problem that when the annual temperature change range is large, the change of the outdoor temperature directly influences the evaporation pressure and the temperature of the refrigeration working medium, thereby influencing the circulation flow of the refrigeration working medium and the compression ratio of the compressor.

Inventors

  • CHEN BINGBING
  • ZHANG WENYAO
  • ZHU DONGXUE
  • ZHANG LU
  • FANG CHAOHE
  • WANG SHEJIAO

Assignees

  • 中石油深圳新能源研究院有限公司
  • 中国石油天然气股份有限公司

Dates

Publication Date
20260508
Application Date
20241106

Claims (10)

  1. 1.A heat pump cycle, comprising: The refrigeration system comprises a refrigeration branch circuit (1), wherein the refrigeration branch circuit (1) comprises an evaporator (11) and a first compressor (12) which are connected in sequence; A heating branch (2), wherein the heating branch (2) comprises a second compressor (21) and a condenser (22) which are sequentially connected, the second compressor (21) is connected with the first compressor (12), the second compressor (21) and the condenser (22) are positioned at the downstream of the first compressor (12), the condenser (22) is connected with the evaporator (11), and The driving branch circuit (3), the driving branch circuit (3) comprises a first valve body (31) and an expander (32) which are connected in sequence, the first valve body (31) is positioned on a passage of the condenser (22) and the expander (32), and the expander (32) is connected with the first compressor (12); The evaporator (11) is provided with a temperature sensor (111), the temperature sensor (111) is electrically connected with the first valve body (31), and the temperature sensor (111) is used for detecting the temperature outside the evaporator (11) and feeding back detection data to the first valve body (31) so as to adjust the opening degree of the first valve body (31).
  2. 2. Heat pump cycle according to claim 1, wherein the refrigeration branch (1) comprises a second valve body (14), the second valve body (14) being located in the path of the condenser (22) and the evaporator (11), the second valve body (14) being electrically connected to the temperature sensor (111).
  3. 3. Heat pump cycle according to claim 2, wherein the heating branch (2) comprises a subcooler (23), the subcooler (23) connecting the condenser (22) with the second valve body (14).
  4. 4. A heat pump cycle as claimed in claim 3, wherein said subcooler (23) further connects said first valve body (31) with said expander (32).
  5. 5. A heat pump cycle as claimed in claim 3, wherein said drive branch (3) further comprises a regenerator (33) and a superheater (34) connected in sequence, said regenerator (33) and said superheater (34) being located on the paths of said subcooler (23) and said expander (32).
  6. 6. The heat pump cycle of claim 5 wherein said regenerator (33) is further connected to said first compressor (12) and said second compressor (21), and said superheater (34) is further connected to said second compressor (21) and condenser (22).
  7. 7. Heat pump cycle according to any one of claims 1 to 6, characterized in that the refrigeration branch (1) comprises a mixer (13), the mixer (13) connecting the evaporator (11) and the first compressor (12), the mixer (13) connecting the expander (32) and the first compressor (12).
  8. 8. A heat pump cycle as claimed in any one of claims 2 to 6, wherein the first valve body (31) and the second valve body (14) are each an electrically-operated temperature-controlled electromagnetic throttle valve or an electrically-operated throttle valve.
  9. 9. Heat pump cycle according to claim 1, wherein the expander (32) is provided with a regulating valve group (321), the regulating valve group (321) being located at the inlet of the expander (32).
  10. 10. An air conditioner, comprising: A heat pump cycle as claimed in any one of claims 1 to 9.

Description

Heat pump circulation system and air conditioner Technical Field The invention relates to the technical field of heat pump heating and ventilation, in particular to a heat pump circulating system and an air conditioner. Background The heat pump is a device for transferring heat energy of a low-level heat source to a high-level heat source, and is a new energy technology which is paid attention to worldwide at present. The heat pump can absorb heat from the environment and transfer the heat to the high-temperature object to realize the purpose of heat supply, and can also absorb heat from the low-temperature object and transfer the heat to the environment to realize the purpose of refrigeration. Heat pumps are generally classified into vapor compression type and absorption type. Vapor compression heat pumps are one of the most common and widely used heat pumps. The heat pump working medium generally circulates in a system consisting of a compressor, a condenser, a throttling device, an evaporator and the like, and low-grade heat energy is pumped to a high-grade temperature area through state change and phase change of the working medium. And the absorption heat pump realizes the transmission of low-grade heat energy to a high-grade temperature zone by consuming higher-grade heat energy. The heat pump is used as an efficient, energy-saving and environment-friendly heating technology, can convert low-grade heat energy into high-grade heat energy while consuming part of electric energy, and is one of effective means for reducing the energy consumption of building air conditioners. However, the annual temperature change range is larger, and the outdoor temperature change directly affects the evaporating pressure and the temperature of the refrigerant, so that the circulating flow of the refrigerant and the compression ratio of the compressor are affected, and if the deviation from the design value is larger, the operation reliability and the operation safety of the compressor can be further endangered. Disclosure of Invention The invention mainly aims to provide a heat pump circulating system and an air conditioner, and aims to solve the problem that when the annual temperature change range is large, the change of outdoor temperature directly influences the evaporation pressure and temperature of a refrigerating medium, so that the circulating flow of the refrigerating medium and the compression ratio of a compressor are influenced. The heat pump circulation system comprises a refrigeration branch, a heating branch and a driving branch, wherein the refrigeration branch comprises an evaporator and a first compressor which are sequentially connected, the heating branch comprises a second compressor and a condenser which are sequentially connected, the second compressor is connected with the first compressor, the second compressor and the condenser are both positioned at the downstream of the first compressor, the condenser is connected with the evaporator, the driving branch comprises a first valve body and an expander which are sequentially connected, the first valve body is positioned on a passage of the condenser and the expander, the expander is connected with the first compressor, the evaporator is provided with a temperature sensor, the temperature sensor is electrically connected with the first valve body, and the temperature sensor is used for detecting the temperature outside the evaporator and feeding back detection data to the first valve body so as to adjust the opening degree of the first valve body. In one embodiment, the refrigeration branch comprises a second valve body, the second valve body is located on a passage of the condenser and the evaporator, and the second valve body is electrically connected with the temperature sensor. In an embodiment, the heating branch includes a subcooler, and the subcooler connects the condenser and the second valve body. In an embodiment, the subcooler further connects the first valve body with the expander. In an embodiment, the driving branch further comprises a heat regenerator and a superheater which are connected in sequence, and the heat regenerator and the superheater are both positioned on the passages of the subcooler and the expander. In an embodiment, the regenerator is further connected to the first compressor and the second compressor, and the superheater is further connected to the second compressor and the condenser. In one embodiment, the refrigeration circuit includes a mixer connecting the evaporator and the first compressor, the mixer connecting the expander and the first compressor. In an embodiment, the first valve body and the second valve body are both electric temperature control valves or electric ball valves. In one embodiment, the expander is provided with a regulating valve located at the inlet of the expander. The invention also provides an air conditioner comprising the heat pump circulation system. According to the technical scheme,