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CN-224215584-U - Water chilling unit

CN224215584UCN 224215584 UCN224215584 UCN 224215584UCN-224215584-U

Abstract

The utility model discloses a water chilling unit which comprises a compressor, a condenser, an evaporator and a gasification heat exchanger, wherein the compressor comprises a first cooling device and a motor, the first cooling device is used for cooling and radiating the motor and comprises a first port and a second port which are respectively used for inputting condensed refrigerant and outputting cooled refrigerant, the gasification heat exchanger comprises a first refrigerant channel and a second refrigerant channel, the first refrigerant channel comprises a third port and a fourth port which are respectively connected with the second port and the evaporator, the second refrigerant channel comprises a fifth port and a sixth port which are respectively connected with an exhaust port of the compressor and the evaporator, and the cooled refrigerant is heated and gasified and returned to the evaporator. The utility model gasifies the cooled refrigerant into gas state and transmits the gas state to the evaporator, thereby preventing the cooled refrigerant from influencing the heat exchange efficiency of the evaporator and the suction liquid of the compressor, improving the heat exchange efficiency, protecting the compressor and prolonging the service life of the compressor.

Inventors

  • MA ZHEN
  • ZHU HAITAO
  • LI GENYUAN
  • LI LIN

Assignees

  • 青岛海信日立空调系统有限公司

Dates

Publication Date
20260508
Application Date
20250429

Claims (10)

  1. 1. The water chilling unit is characterized by comprising a compressor, a condenser, an evaporator and a gasification heat exchanger; The compressor comprises a first cooling device and a motor, wherein the first cooling device is used for cooling and radiating the motor and comprises a first port and a second port which are respectively used for inputting a condensing refrigerant and outputting the cooled refrigerant; The gasification heat exchanger comprises a first refrigerant channel and a second refrigerant channel, wherein the first refrigerant channel comprises a third port and a fourth port which are respectively connected with the second port and the evaporator, and the second refrigerant channel comprises a fifth port and a sixth port which are respectively connected with an exhaust port of the compressor and the evaporator and used for heating and gasifying the cooled refrigerant and returning to the evaporator.
  2. 2. The chiller according to claim 1 further comprising a dry filter, wherein a first outlet is provided in a lower portion of the condenser and is connected to the first port through the dry filter.
  3. 3. The chiller according to claim 1 further comprising a flow regulator valve disposed on a line connecting said exhaust port to said fifth port, one end of said flow regulator valve being connected to said exhaust port via a line, and the other end of said flow regulator valve being connected to said fifth port via a line.
  4. 4. The chiller according to claim 3 further comprising a temperature sensing unit and a pressure sensing unit disposed on the lines between said fourth port and said evaporator for monitoring the temperature and pressure of said cooled refrigerant entering said evaporator.
  5. 5. The water chiller according to any one of claims 1 to 4 further comprising a frequency converter, a second cooling device; the frequency converter is connected with the compressor and used for controlling the compressor; The second cooling device is connected with the frequency converter and used for cooling and radiating the frequency converter and comprises a seventh port and an eighth port, a second outlet is arranged at the lower part of the condenser and connected with the seventh port, and the eighth port is connected with the third port through a pipeline.
  6. 6. The water chiller according to claim 5 wherein the gasification heat exchanger is a plate heat exchanger; The upper part of the evaporator is provided with a first inlet and a second inlet which are respectively connected with the fourth port and the sixth port.
  7. 7. The water chiller according to any one of claims 2 to 4 further comprising an economizer comprising a liquid inlet, a liquid outlet, a gas supply; The bottom of the condenser is also provided with a third outlet which is connected with the liquid inlet, the liquid outlet is connected with the evaporator, and the air supplementing port is connected with the compressor.
  8. 8. The water chilling unit comprises a compressor, a condenser and an evaporator, and is connected through pipelines to form a refrigeration cycle system, and is characterized by further comprising: a frequency converter connected with the compressor for controlling the compressor; the second cooling device is connected with the frequency converter and used for cooling and radiating the frequency converter and comprises a seventh port and an eighth port which are respectively used for inputting a condensing refrigerant and outputting the cooled refrigerant; The gasification heat exchanger comprises a first refrigerant channel and a second refrigerant channel, wherein the first refrigerant channel comprises a third port and a fourth port which are respectively connected with the seventh port and the evaporator, the cooled refrigerant is heated and gasified and then returns to the evaporator, and the second refrigerant channel comprises a fifth port and a sixth port which are respectively connected with an exhaust port of the compressor and the evaporator.
  9. 9. The water chilling unit is characterized by comprising a compressor, a condenser, an evaporator and a gasification heat exchanger; The compressor comprises a first cooling device and a motor, wherein the first cooling device is used for cooling and radiating the motor and comprises a first port and a second port which are respectively used for inputting a condensing refrigerant and outputting the cooled refrigerant; the gasification heat exchanger comprises a first refrigerant channel and a coolant channel, wherein the first refrigerant channel comprises a third port and a fourth port which are respectively connected with the second port and the evaporator, and the coolant channel comprises a fifth port and a sixth port which are respectively connected with a coolant inlet and a coolant outlet of the condenser.
  10. 10. The water chiller according to claim 9 further comprising a frequency converter, a second cooling device; the frequency converter is connected with the compressor and used for controlling the compressor; The second cooling device is connected with the frequency converter and used for cooling and radiating the frequency converter, and comprises a seventh port and an eighth port which are respectively connected with the condenser and the third port and used for inputting the condensed refrigerant and outputting the cooled refrigerant.

Description

Water chilling unit Technical Field The utility model relates to the technical field of air conditioning, in particular to a water chilling unit. Background At present, cooling of a motor and a frequency converter of the existing water chilling unit is realized by using a refrigerant. The refrigerant cooling is generally performed by taking liquid from a pipeline at the rear side of the condenser to cool a motor and a frequency converter of the compressor by taking pressure difference between the condenser and the evaporator as power, and the refrigerant returns to the evaporator after the motor and the frequency converter are cooled. The heating values of the motor and the frequency converter can be changed continuously according to the running conditions of the random group and the state of the heat exchanger of the unit, so that the refrigerant liquid used for cooling cannot ensure sufficient heat exchange and is gasified completely. If the cooling return air is returned to the upper part of the evaporator cylinder, the air is sucked to the inlet of the compressor along with the air suction of the compressor, so that the air suction is carried with liquid, and the impeller of the compressor is damaged in serious cases, so that serious consequences are caused, and if the cooling return air is returned to the lower part of the evaporator, the refrigerant gas in the air-liquid mixed refrigerant occupies a large amount of heat exchange space of the heat exchange tube, so that the heat exchange efficiency is reduced. The above information disclosed in this background section is only for enhancement of understanding of the background section of the application and therefore it may not form the prior art that is already known to those of ordinary skill in the art. Disclosure of Invention Aiming at the problems that the air suction of a compressor is carried with liquid or the heat exchange efficiency is affected due to the fact that a refrigerant of a cooling compressor and/or a frequency converter in a water chilling unit returns to an evaporator, the utility model provides a gasification heat exchanger which is added in the water chilling unit, so that the cooled refrigerant exchanges heat with the overheated gaseous refrigerant discharged by the compressor to gasify, the problems that the air suction of the compressor is carried with liquid and the heat exchange efficiency of the evaporator is affected are solved, the air suction superheat degree is improved, the air suction carrying condition of the unit is improved, the stability, the reliability and the safety of the system operation are improved, and the service life of the compressor is prolonged. In order to achieve the aim of the utility model, the utility model is realized by adopting the following technical scheme: A water chilling unit comprises a compressor, a condenser, an evaporator and a gasification heat exchanger; The compressor comprises a first cooling device and a motor, wherein the first cooling device is used for cooling and radiating the motor and comprises a first port and a second port which are respectively used for inputting a condensing refrigerant and outputting the cooled refrigerant; The gasification heat exchanger comprises a first refrigerant channel and a second refrigerant channel, wherein the first refrigerant channel comprises a third port and a fourth port which are respectively connected with the second port and the evaporator, and the second refrigerant channel comprises a fifth port and a sixth port which are respectively connected with an exhaust port of the compressor and the evaporator and used for heating and gasifying the cooled refrigerant and returning to the evaporator. The water chilling unit disclosed by the utility model has the advantages that the gasification heat exchanger is arranged, the cooled refrigerant for cooling and radiating output of the compressor is heated and gasified into the gaseous refrigerant, the gaseous refrigerant is conveyed to the evaporator and returned to the air suction port of the compressor by the evaporator, so that the air suction superheat degree is improved, the problem that the heat exchange efficiency is affected due to the fact that the heat exchange area is occupied by the gas-liquid mixed state of the cooled refrigerant entering the bottom of the evaporator is solved, the heat exchange efficiency of the evaporator is improved, or the problem that the air suction liquid is carried by the compressor due to the fact that the cooled refrigerant directly returns to the air suction pipeline of the compressor is solved, the air suction superheat degree is improved, the compressor is protected, the service life of the compressor is prolonged, and meanwhile, the stability, the reliability and the safety of the running of the water chilling unit system are improved. In some specific embodiments, the condenser further comprises a dry filter, and a first outlet is arranged at the l