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CN-121993934-A - Injection module for heat pump system and heat pump system thereof

CN121993934ACN 121993934 ACN121993934 ACN 121993934ACN-121993934-A

Abstract

The invention discloses an injection module for a heat pump system and the heat pump system thereof, and belongs to the technical field of heat pumps. The injection module comprises an injector and a drain valve, wherein the injector is provided with a secondary flow channel with a secondary flow chamber and a primary flow channel with a primary flow chamber, one end of the secondary flow channel is positioned in the primary flow chamber, and a crack channel is formed between the outer wall of the secondary flow channel and the inner wall of the primary flow chamber. The invention avoids the situation that the ejector does not have the function of high-efficiency gas-liquid pre-separation, so that a large amount of liquid media are entrained in the mixed refrigerant sprayed out of the ejector at high speed and directly enter the gas-liquid separator.

Inventors

  • YAO CHANGSHENG
  • XU NINGHU
  • ZHOU SHAODONG
  • ZHOU ANG
  • Ge Ziming

Assignees

  • 常州凯得利机械有限公司

Dates

Publication Date
20260508
Application Date
20260408

Claims (10)

  1. 1. An injection module for a heat pump system is characterized by comprising an injector (1) and a drain valve (5), wherein the injector (1) is provided with a secondary flow channel (2) with a secondary flow chamber (201) and a primary flow channel (3) with a primary flow chamber (301), one end of the secondary flow channel (2) is positioned in the primary flow chamber (301), and a crack channel (3011) is formed between the outer wall of the secondary flow channel (2) and the inner wall of the primary flow chamber (301); The end part of the secondary flow chamber (201) is provided with a three-way pipe (31) which is vertically arranged, the upper end and the lower end of the three-way pipe (31) are provided with an input port (311) which is communicated with a crack channel (3011), and the other end of the three-way pipe is provided with an output jet port (312); The ejector (1) is internally provided with a mixing zone (101) communicated with the secondary flow chamber (201), and the jet orifice (312) is also positioned in the mixing zone (101); One end of the crack channel (3011) is provided with a runner for discharging liquid, and the runner is communicated with the drain valve (5).
  2. 2. An ejector module for a heat pump system according to claim 1, wherein the secondary flow channel (2) is located in the primary flow chamber (301) and has a straight tube section concentric with the primary flow chamber (301), the slit channel (3011) being formed between the outer wall of the straight tube section and the inner wall of the primary flow chamber (301).
  3. 3. The injection module for a heat pump system according to claim 2, wherein the cavity bottom of the primary flow cavity (301) is provided with an annular guide ring (7), the guide ring (7) is positioned at the end part of the crack channel (3011), the outer peripheral surface of the guide ring (7) is attached to the inner end surface of the crack channel (3011), the inner peripheral surface is attached to the outer peripheral surface of the secondary flow channel (2), the end surface, close to the input port (311), of the guide ring (7) is a guide surface (71), and the height of the guide surface (71) gradually decreases from the center of a circle to the outside.
  4. 4. An ejector module for a heat pump system according to claim 3, wherein one side end of the guide surface (71) extends to the inlet (311).
  5. 5. The injection module for a heat pump system according to claim 3, wherein a notch (72) communicated with the primary flow channel (3) is formed at the lower end of the guide ring (7), a water draining cavity (103) is formed at the lower end of the injector (1), a water draining pipe (6) is communicated at the outlet of the water draining cavity (103), and the water outlet end of the water draining pipe (6) is connected with a drain valve (5); The tee pipe (31) is provided with a vertical section (313) which is vertically arranged and a transverse section (314) which is transversely arranged, the transverse section (314) is communicated with the vertical section (313), the input port (311) is positioned at two ends of the vertical section (313), the transverse section (314) is positioned between the jet port (312) and the vertical section (313), and the notch (72) is positioned right below the vertical section (313).
  6. 6. The ejector module for a heat pump system according to claim 1, wherein the secondary flow channel (2) is provided with a plurality of guide strips (21) along the circumferential direction, and the guide strips (21) are spirally arranged along the axial direction of the secondary flow channel (2) in the primary flow chamber (301) and are positioned at one side of the input port (311).
  7. 7. An ejector module for a heat pump system according to claim 1, wherein the inner diameter of the injection port (312) gradually decreases from an end near the secondary flow passage (2) to an end far from the secondary flow passage (2).
  8. 8. An ejector module for a heat pump system according to claim 1, wherein the ejector (1) further has an outlet end (4), the outlet end (4) has a diffuser region (102) communicating with the mixing region (101), and the diffuser region (102) has an inner diameter that gradually increases from an end near the mixing region (101) to an end far from the mixing region (101).
  9. 9. A heat pump system comprising an ejector module for a heat pump system according to claim 1 to 8.
  10. 10. The heat pump system according to claim 9, further comprising a condenser (8), a gas-liquid separator (9), an electronic expansion valve (10), an evaporator (11) and a compressor (12), wherein an output end of the condenser (8) is connected with the primary flow channel (3), an output end (4) is connected with an inlet of the gas-liquid separator (9), a gas outlet of the gas-liquid separator (9) is connected with an inlet of the compressor (12), a liquid outlet is connected with an inlet of the electronic expansion valve (10), and an outlet of the compressor (12) is connected with an inlet of the condenser (8); the outlet of the electronic expansion valve (10) is connected with the inlet of the evaporator (11), and the outlet of the evaporator (11) is respectively connected with the inlet of the secondary flow channel (2) and the inlet of the compressor (12); The inlet of the drain valve (5) is connected with the outlet of the drainage cavity (103), and the outlet of the drain valve (5) is connected with the inlet of the electronic expansion valve (10).

Description

Injection module for heat pump system and heat pump system thereof Technical Field The invention relates to the technical field of heat pump systems, in particular to an injection module for a heat pump system and the heat pump system thereof. Background The heat pump system is used as a high-efficiency energy-saving heat transfer device and is widely applied to the fields of heating, refrigeration, domestic hot water and the like. A gas-liquid separator is usually provided in front of the compressor suction port, and serves to separate the refrigerant from the evaporator into gas and liquid, so that saturated gas enters the compressor, and the separated liquid is temporarily stored and slowly returned to the compressor or other parts of the system, thereby preventing liquid impact. With further development of heat pump technology, ejector technology is introduced into heat pump systems in order to improve the heating capacity and energy efficiency of the systems under low temperature conditions. The ejector utilizes the kinetic energy of the high-pressure fluid to eject the low-pressure fluid, and improves the suction pressure through the mixing and diffusion processes, so that the compression ratio of the compressor is reduced, and the system performance is improved. However, in the existing heat pump system architecture including an ejector, the outlet mixture of the ejector is usually directly sent to a gas-liquid separator for separation, and the treatment mode can raise the pressure in the high-speed mixing process in the ejector, but the treatment mode does not have an efficient gas-liquid pre-separation function. When a two-phase flow containing a large amount of liquid refrigerant is ejected from an ejector at a high speed and directly enters a gas-liquid separator, the gas-liquid separator tends to be difficult to achieve complete separation in a short time due to an excessively high flow rate and a disturbed flow state. Once the gas-liquid separation is incomplete, the risk of liquid hammer occurring in the compressor will increase substantially. The hydraulic shock not only causes the risk of the hydraulic shock damage, but also dilutes the refrigerating machine oil in the compressor, so that the lubricating performance is reduced and the abrasion is increased. Meanwhile, the refrigerant entering the compressor is insufficient in dryness, the compression process deviates from an ideal adiabatic compression process, so that the indication efficiency of the compressor is reduced, the operation efficiency of the whole heat pump system is low, the energy consumption is increased, and the reliability is poor. It is therefore necessary to provide an ejector module for a heat pump system and a heat pump system thereof to solve the above-mentioned problems. Disclosure of Invention Based on the above problems in the prior art, an objective of the present invention is to provide an injection module for a heat pump system and a heat pump system thereof, so as to solve the problems set forth in the background art. The technical scheme includes that the injection module for the heat pump system comprises an injector and a drain valve, wherein the injector is provided with a secondary flow channel with a secondary flow chamber and a primary flow channel with a primary flow chamber, one end of the secondary flow channel is positioned in the primary flow chamber, and a crack channel is formed between the outer wall of the secondary flow channel and the inner wall of the primary flow chamber; The end part of the secondary flow chamber is provided with a three-way pipe which is vertically arranged, the upper end and the lower end of the three-way pipe are provided with input ports which are communicated with the crack channel, and the other end of the three-way pipe is provided with an output jet port; The ejector is internally provided with a mixing zone communicated with the secondary flow chamber, and the jet orifice is also positioned in the mixing zone; one end of the crack channel is provided with a flow channel for discharging liquid, and the flow channel is communicated with the drain valve. Further, the secondary flow channel is provided with a straight pipe section at the position in the primary flow chamber, the straight pipe section is concentric with the primary flow chamber, and the crack channel is formed between the outer wall of the straight pipe section and the inner wall of the primary flow chamber. Further, the cavity bottom of the primary flow cavity is provided with an annular guide ring, the guide ring is positioned at the end part of the crack channel, the outer peripheral surface of the guide ring is attached to the inner end surface of the crack channel, the inner peripheral surface is attached to the outer peripheral surface of the secondary flow channel, the end surface, close to the input port, of the guide ring is a guide surface, and the height of the guide surface gradually descend