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CN-224215474-U - Integrated water chilling unit suitable for high-temperature water outlet

CN224215474UCN 224215474 UCN224215474 UCN 224215474UCN-224215474-U

Abstract

The utility model discloses an integrated water chilling unit suitable for high-temperature water outlet, which relates to the field of refrigeration equipment and comprises a condenser, an evaporator, a compressor, a cooling tower and a user air conditioner tail end system, wherein a shell side outlet of the evaporator is connected to an air suction port of the compressor, an air exhaust port of the compressor is connected to a shell side inlet of the condenser, a shell side outlet of the condenser is connected with the shell side inlet of the evaporator through a throttling device to form a refrigerant circulation of the water chilling unit, a tube side of the condenser is connected to the cooling tower through a cooling water inlet pipeline and a cooling water outlet pipeline to form a cooling water heat exchange circulation, and heat exchange pipes of the evaporator are of two flows. According to the utility model, the water outlet pipes are respectively arranged at the two ends of the evaporator, and the electric butterfly valve arranged on the external water path is used for switching the circulating water path, so that the double-mode free conversion of single-flow heat exchange and two-flow heat exchange of the evaporator is realized.

Inventors

  • WANG YUXIA
  • YUAN MING
  • Ying Jinlei
  • CHEN WEIFU
  • ZHAO LIQING

Assignees

  • 浙江思科制冷股份有限公司

Dates

Publication Date
20260508
Application Date
20250509

Claims (7)

  1. 1. The integrated water chilling unit suitable for high-temperature water outlet is characterized by comprising a condenser (1), an evaporator (2), a compressor (3), a cooling tower (9) and a user air conditioner tail end system (10); The shell side outlet of the evaporator (2) is connected to the air suction port of the compressor (3), the air exhaust port of the compressor (3) is connected to the shell side inlet of the condenser (1), and the shell side outlet of the condenser (1) is connected with the shell side inlet of the evaporator (2) through a throttling device (4) to form the refrigerant circulation of the water chilling unit; The tube side of the condenser (1) is connected to a cooling tower (9) through a cooling water inlet pipeline (7) and a cooling water outlet pipeline (8) to form a cooling water heat exchange cycle; The heat exchange tube of the evaporator (2) is in two flows, one end of a cylinder (213) of the evaporator (2) is provided with a water chamber (211), one water chamber (211) is provided with a water outlet tube (21) which is used for being connected with a high-temperature water outlet pipeline (601), the other end of the cylinder (213) is provided with a water chamber (212) on two sides, the water chamber (212) is provided with a water inlet tube (22) on two sides which is used for being connected with a chilled water inlet pipeline (5) and a water outlet tube (23) on two sides which is used for being connected with a low-temperature water outlet pipeline (602), the high-temperature water outlet pipeline (601) and the low-temperature water outlet pipeline (602) are converged at a position close to a user air conditioning end system (10) to form a chilled water outlet pipeline (6) and are connected to a water inlet of the user air conditioning end system (10) to form a chilled water heat exchange cycle, the high-temperature water outlet pipeline (601) is provided with an electric butterfly valve A (11), and the low-temperature water outlet pipeline (602) is provided with an electric butterfly valve B (12).
  2. 2. The integrated water chilling unit suitable for high-temperature water outlet according to claim 1, wherein when the electric butterfly valve A (11) is opened and the electric butterfly valve B (12) is closed, the chilled water inlet pipeline (5) is communicated with the high-temperature water outlet pipeline (601), and chilled water is subjected to single-flow heat exchange to the one-side water chamber (211) through the evaporator (2) to form high-temperature water outlet circulation.
  3. 3. The integrated water chilling unit suitable for high-temperature water outlet according to claim 1, wherein when the electric butterfly valve A (11) is closed and the electric butterfly valve B (12) is opened, the chilled water inlet pipeline (5) is communicated with the low-temperature water outlet pipeline (602), and chilled water exchanges heat to the two side water chambers (212) through two processes of the evaporator (2) to form low-temperature water outlet circulation.
  4. 4. The integrated water chilling unit suitable for high-temperature water outlet according to claim 1, wherein the evaporator (2) is a flooded evaporator or a falling film evaporator.
  5. 5. The integrated water chilling unit suitable for high-temperature water outlet according to claim 1, wherein a water flow switch (15) and a temperature sensor (16) are arranged on the chilled water outlet pipeline (6).
  6. 6. The integrated water chilling unit suitable for high-temperature water outlet according to claim 1, wherein a freezing pump (13) is arranged on the freezing water inlet pipeline (5).
  7. 7. The integrated water chilling unit suitable for high-temperature water outlet according to claim 1, wherein a cooling pump (14) is arranged on the cooling water inlet pipeline (7).

Description

Integrated water chilling unit suitable for high-temperature water outlet Technical Field The utility model relates to the field of refrigeration equipment, in particular to an integrated water chilling unit suitable for high-temperature water outlet. Background At present, the national standard GB-T18430.1 refers to the specification of the application range of the refrigeration working condition of the water chilling unit to be 5-15 ℃, and refrigeration equipment manufacturers often apply an optimal design to the temperature range, such as a compressor with an optimal refrigeration application, and the cost is relatively lower but the safe operation range is relatively narrower. If chilled water with the temperature of more than 15 ℃ is required to be provided, under the condition that a compressor is not replaced, the heat exchange area of an evaporator is required to be limited to control the evaporation temperature to a relatively low degree due to the limitation of the operation range of the optimized compressor for refrigeration application, and the heat exchange area of the unit is smaller in the conventional water outlet temperature range of 5-15 ℃, so that the operation efficiency of the unit is obviously reduced. The common solution is that components such as an intermediate heat exchanger, a water storage tank and the like are added in a refrigerating waterway outside a water chilling unit, and the requirement of a user on high water outlet temperature is met by utilizing a secondary heat exchange method. However, this solution increases the equipment cost and the complexity of piping to a large extent. Disclosure of utility model The utility model aims to overcome the defects in the prior art and provide an integrated water chilling unit suitable for high-temperature water outlet, wherein water outlet pipes are respectively arranged at two ends of an evaporator, and a circulation waterway is switched by an electric butterfly valve arranged on an external water path, so that the double-mode free conversion of single-flow heat exchange and two-flow heat exchange of the evaporator is realized. In the two-flow heat exchange mode, the heat exchange area of all evaporators is used to realize high-efficiency refrigeration in the conventional water outlet temperature range of 5-15 ℃, and in the single-flow heat exchange mode, the area of the evaporator heat exchanger is reduced, so that the evaporation temperature can be controlled to be lower while the water outlet temperature is high, and the safe operation range of the compressor is not exceeded. And extra intermediate heat exchange equipment is omitted, water circulation piping is simplified, and cost is saved. The utility model aims at achieving the purposes through the following technical scheme that the integrated water chilling unit suitable for high-temperature water outlet comprises a condenser, an evaporator, a compressor, a cooling tower and a user air conditioner tail end system; The shell side outlet of the condenser is connected with the shell side inlet of the evaporator through a throttling device to form a refrigerant cycle of the water chilling unit; The tube side of the condenser is connected to the cooling tower through a cooling water inlet pipeline and a cooling water outlet pipeline to form cooling water heat exchange circulation; The heat exchange tube of the evaporator is provided with two flows, one side water chamber is arranged at one end of a cylinder of the evaporator, one side water outlet tube is arranged on the one side water chamber and is used for being connected with a high-temperature water outlet pipeline, the other end of the cylinder is provided with two side water chambers, two side water inlet tubes used for being connected with a chilled water inlet pipeline and two side water outlet tubes used for being connected with a low-temperature water outlet pipeline are arranged on the two side water chambers, the high-temperature water outlet pipeline and the low-temperature water outlet pipeline are converged at a position close to a user air conditioner end system to form a chilled water outlet pipeline and are connected to a water inlet of the user air conditioner end system, the chilled water inlet pipeline is connected to a water outlet of the user air conditioner end system to form a chilled water heat exchange cycle, an electric butterfly valve A is arranged on the high-temperature water outlet pipeline, and an electric butterfly valve B is arranged on the low-temperature water outlet pipeline. As a further technical scheme, when the electric butterfly valve A is opened and the electric butterfly valve B is closed, the chilled water inlet pipeline is communicated with the high-temperature water outlet pipeline, and chilled water is subjected to single-flow heat exchange to a water chamber at one side through the evaporator, so that high-temperature water outlet circulation is formed. As a further technical sc