Industrial water chilling unit with waste heat recovery

Abstract

The application relates to the field of water chilling units, in particular to an industrial water chilling unit with waste heat recovery. The industrial water chilling unit with waste heat recovery comprises a water chilling unit and waste heat segmented recovery assemblies, and the like, a plurality of waste heat segmented recovery assemblies are arranged and correspond to each U-shaped return bend, all the waste heat segmented recovery assemblies are located in the U-shaped water storage shell, and a plurality of first water drainage pipes and first water supply pipes are communicated with the U-shaped water storage shell. By dividing the condensation heat exchange zone into a plurality of independent recovery sections arranged in sequence along the flow direction of the refrigerant, hot water with different temperatures is respectively output through the independent water drainage pipes of the sections, a plurality of grades of hot water can be directly obtained, the temperature requirements in actual use and production can be met, secondary temperature raising or temperature reduction is not needed, the temperature of energy is matched, and the cascade utilization is realized, and the comprehensive utilization value of waste heat is improved.

Description

Technical Field

[0001] This invention relates to the field of water chillers, and more particularly to an industrial water chiller with waste heat recovery. Background Technology

[0002] In traditional chiller units, the condenser, as the main heat dissipation component, is usually cooled by air or water to directly release the heat carried by the high-temperature, high-pressure gaseous refrigerant discharged from the compressor into the atmosphere or dissipate it through a cooling tower. This heat is a high-quality waste heat resource, but it has long been neglected and wasted. In existing technologies, although some waste heat recovery devices have been attempted, the following shortcomings still exist: Most waste heat recovery devices only add a simple shell-and-tube heat exchanger to the condenser outlet or exhaust pipe. Since the inlet temperature is the highest and the outlet temperature is relatively low, the temperature distribution along the condenser is uneven. The single recovery method results in the mixed output of high-grade heat and low-grade heat, which is difficult to meet the hot water demand of different temperature ranges in actual production. The recovery method is crude and cannot make fine use of the temperature gradient in different sections of the condenser. Summary of the Invention

[0003] To overcome the shortcomings of existing waste heat recovery methods, which are crude and cannot make precise use of the temperature gradient in different sections of the condenser, this invention provides an industrial chiller unit with waste heat recovery.

[0004] Technical solution: An industrial chiller unit with waste heat recovery, comprising: a chiller unit, wherein the heat exchange coil is composed of a plurality of U-shaped bends arranged in an equidistant array, and a U-shaped water storage shell is fixedly connected to the heat exchange coil; a plurality of waste heat segmented recovery components, each corresponding to one of the U-shaped bends, all of the waste heat segmented recovery components being located within the U-shaped water storage shell, and a plurality of first drain pipes and first water supply pipes being connected to the U-shaped water storage shell; and a plurality of cleaning components, all disposed on the U-shaped bends and corresponding to one of the waste heat segmented recovery components; wherein, the first drain pipes are provided with a plurality of drain branch pipes, the first water supply pipes are provided with a plurality of water supply branch pipes, and each of the drain branch pipes and the water supply branch pipes corresponds to one of the waste heat segmented recovery components.

[0005] Further explanation: The waste heat segmented recovery assembly includes: a first isolation cover, fixedly connected to the U-shaped water storage shell; a second isolation cover, fixedly connected to both the first isolation cover and the U-shaped water storage shell; and a third isolation cover, fixedly connected to both the second isolation cover and the U-shaped water storage shell; wherein the first isolation cover, the second isolation cover, and the third isolation cover are all fixedly connected to the U-shaped bend pipe, and each of them is provided with a plurality of guide plates fixedly connected to the U-shaped bend pipe, thereby forming an S-shaped flow channel inside the first isolation cover, the second isolation cover, and the third isolation cover through the plurality of guide plates.

[0006] To further explain, the first isolation cover, the second isolation cover, and the third isolation cover each correspond to one of the first drain pipes, and each of the first isolation cover, the second isolation cover, and the third isolation cover is connected to one of the drain branch pipes.

[0007] To further explain, the first, second, and third isolation covers are all made of heat-insulating material. Each of the first, second, and third isolation covers is equipped with a control valve, and the control valves are all located at positions away from the first, second, and third isolation covers and connected to the corresponding drainage branch pipes. Each of the first drainage pipes is equipped with a temperature sensor.

[0008] To further explain, the first isolation cover is positioned near the air inlet of the U-shaped bend.

[0009] To further explain, the cleaning assembly includes several cleaning units, each of which is connected to one of the guide plates. Each cleaning unit includes a return spring fixed to the guide plate and a first cleaning ring fixed to the return spring. The first cleaning ring is slidably connected to the U-shaped bend pipe.

[0010] Further explanation: the cleaning assembly also includes a plurality of second cleaning rings slidably connected to the U-shaped bend pipe, a plurality of first branch pipes respectively connected to a plurality of water supply branch pipes, a plurality of first spray pipes respectively connected to a plurality of first branch pipes, a second water supply pipe connected to the chiller unit, a plurality of second branch pipes connected to the second water supply pipe, and a plurality of second spray pipes respectively connected to a plurality of second branch pipes; wherein, each water supply branch pipe is provided with a solenoid valve, and the solenoid valve controls whether the water supply branch pipe is connected to the U-shaped water storage shell, and each of the plurality of second cleaning rings corresponds to one first spray pipe and one second spray pipe on each side.

[0011] Further explanation: the waste heat segmented recovery assembly also includes a U-shaped partition fixedly connected to the first isolation cover, the second isolation cover and the third isolation cover, and a second drain pipe connected to the U-shaped water storage shell; wherein, the U-shaped partition is fixedly connected to the U-shaped water storage shell, and the second drain pipe is provided with a plurality of branch pipes, each of the branch pipes being located above one of the U-shaped partitions.

[0012] Further explanation: It also includes a hollow insulation cylinder installed on the connecting pipe between the evaporator and the expansion valve in the chiller unit, an outlet pipe connected to the hollow insulation cylinder, an inlet pipe connected to the hollow insulation cylinder, and several connecting pipes connected to the inlet pipe; wherein, each of the connecting pipes is equipped with an electromagnetic regulating valve, and each of the connecting pipes is connected to one of the first drain pipes as a branch pipe.

[0013] To further explain, the inner ring surface of the hollow insulation cylinder is provided with an annular filling groove for filling with heat-conducting mud, and the inner cylinder of the hollow insulation cylinder is provided with a threaded groove.

[0014] The beneficial effects of this invention are as follows: 1. By dividing the condensation heat exchange zone into multiple independent recovery sections arranged sequentially along the refrigerant flow direction, hot water at different temperatures can be output separately through independent drainage pipes of each section, thereby directly obtaining hot water of multiple grades to meet the various temperature requirements during actual production use. No secondary heating or cooling is required, realizing the temperature matching and cascade utilization of energy, and improving the comprehensive utilization value of waste heat.

[0015] 2. The first and second cleaning rings move back and forth on the U-shaped bend, cleaning through friction. The first and second cleaning rings clean the surface of the U-shaped bend, preventing scale buildup and ensuring heat exchange efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the chiller unit of the present invention; Figure 4 This is a schematic diagram of the combined structure of the U-shaped water storage shell, the first isolation cover, the second isolation cover, the third isolation cover, and the U-shaped partition of the present invention; Figure 5 This is a partial structural diagram of the present invention; Figure 6 This is an enlarged view of region B of the present invention; Figure 7 This is a schematic diagram of the combined structure of the second diversion pipe and the second spray pipe of the present invention; Figure 8 This is a schematic diagram of the combined structure of the first drainage pipe and the drainage branch pipe of the present invention; Figure 9 This is a schematic diagram of the U-shaped bend pipe structure of the present invention; Figure 10 This is a schematic diagram of the combined structure of the first isolation cover, the second isolation cover, the third isolation cover, and the control valve of the present invention; Figure 11 This is an enlarged view of area A of the present invention; Figure 12 This is a schematic diagram of the combined structure of the hollow insulation cylinder, water outlet pipe, water inlet pipe and connecting pipe of the present invention; Figure 13 This is a cross-sectional view of the hollow insulation cylinder of the present invention.

[0017] The markings in the attached diagram are as follows: 1-Chiller unit, 101-U-shaped bend pipe, 1011-Air inlet, 1012-Liquid outlet, 102-Evaporator, 103-Expansion valve, 2-U-shaped water storage shell, 3-First isolation cover, 4-Second isolation cover, 5-Third isolation cover, 6-Control valve, 7-First drain pipe, 701-Drain branch pipe, 8-First water supply pipe, 801-Water supply branch pipe, 9-Guide plate, 10-First cleaning ring, 11-Reset spring, 12-Second cleaning ring, 13-First diversion pipe, 1301-First spray pipe, 14-Second water supply pipe, 15-Second diversion pipe, 1501-Second spray pipe, 16-Hollow insulation cylinder, 1601-Annular filling groove, 1602-Threaded groove, 17-Water outlet pipe, 18-Water inlet pipe, 19-Connecting pipe, 20-U-shaped partition, 21-Second drain pipe. Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions herein are used to explain the present invention, but are not intended to limit the present invention.

[0019] Example according to Figures 1-13 As shown, this embodiment provides an industrial chiller unit with waste heat recovery, including a chiller unit 1, a cleaning component, and a heat exchange coil composed of several equidistantly arranged U-shaped bends 101. High-temperature, high-pressure gaseous refrigerant is condensed through these U-shaped bends 101. A U-shaped water storage shell 2 is fixed to the heat exchange coil. Several waste heat recovery components are provided, each corresponding to one of the U-shaped bends 101, for segmented recovery of waste heat within each U-shaped bend 101. All the waste heat segmented recovery components are located inside the U-shaped water storage shell 2. The U-shaped water storage shell 2 is connected to several first drain pipes 7 and first water supply pipes 8. Cold water for heat exchange is input into the U-shaped water storage shell 2 through the first water supply pipes 8, and hot water after heat exchange is discharged through the first drain pipes 7. Several cleaning components are provided, all of which are installed on the U-shaped bend pipe 101 and correspond to each of the waste heat segmented recovery components. They are used to clean the surface of the U-shaped bend pipe 101 to prevent scale buildup on the surface of the U-shaped bend pipe 101 from affecting the heat exchange efficiency. The first drain pipe 7 is provided with several drain branch pipes 701, and the first water supply pipe 8 is provided with several water supply branch pipes 801. Each drain branch pipe 701 and each water supply branch pipe 801 corresponds to one of the waste heat segmented recovery components. Different sections of each waste heat segmented recovery component discharge hot water through the drain branch pipes 701 corresponding to different sections of the first drain pipe 7, so that the hot water after heat exchange in different sections of each waste heat segmented recovery component is discharged separately for utilization, thereby achieving refined utilization.

[0020] The waste heat segmented recovery assembly includes a first isolation cover 3, a second isolation cover 4, and a third isolation cover 5: wherein the first isolation cover 3 is fixedly connected to the U-shaped water storage shell 2; the second isolation cover 4 is fixedly connected to both the first isolation cover 3 and the U-shaped water storage shell 2; and the third isolation cover 5 is fixedly connected to both the second isolation cover 4 and the U-shaped water storage shell 2; the first isolation cover 3, the second isolation cover 4, and the third isolation cover 5 divide the U-shaped bend pipe 101 inside the U-shaped water storage shell 2 into different sections, facilitating the separate recovery and utilization of waste heat from different sections; The first isolation cover 3, the second isolation cover 4 and the third isolation cover 5 are all fixedly connected to the U-shaped bend pipe 101, and each of them is provided with a number of guide plates 9 fixedly connected to the U-shaped bend pipe 101. The number of guide plates 9 forms an S-shaped flow channel in the first isolation cover 3, the second isolation cover 4 and the third isolation cover 5, thereby extending the cold water flow path and enhancing the condensation and heat exchange effect.

[0021] The first isolation cover 3, the second isolation cover 4 and the third isolation cover 5 are respectively associated with one of the first drain pipes 7, and each of the first isolation cover 3, the second isolation cover 4 and the third isolation cover 5 is connected to one of the drain branch pipes 701. Through different first drain pipes 7, hot water of different temperatures generated by heat exchange in the first isolation cover 3, the second isolation cover 4 and the third isolation cover 5 is discharged and utilized, so as to realize the refined utilization of waste heat.

[0022] The first isolation cover 3, the second isolation cover 4, and the third isolation cover 5 are all made of heat insulation material to avoid mutual interference between the hot water generated by heat exchange in different sections. Each of the first isolation cover 3, the second isolation cover 4, and the third isolation cover 5 is equipped with a control valve 6, and the control valve 6 is located away from the first isolation cover 3, the second isolation cover 4, and the third isolation cover 5 and the corresponding drain branch pipe 701. Each of the first drain pipes 7 is equipped with a temperature sensor to monitor the output hot water temperature and control the water inflow through the control valve 6.

[0023] The first isolation cover 3 is positioned near the air inlet 1011 of the U-shaped bend pipe 101, so that the hot water temperature generated by heat exchange inside the first isolation cover 3 is the highest. Correspondingly, the hot water temperature generated by heat exchange in the second isolation cover 4 and the third isolation cover 5 decreases sequentially after the first isolation cover 3.

[0024] The cleaning assembly includes several cleaning units, each of which is connected to a guide plate 9. Each cleaning unit includes a return spring 11 fixedly connected to the guide plate 9 and a first cleaning ring 10 fixedly connected to the return spring 11. The first cleaning ring 10 is a rubber ring and is slidably connected to the U-shaped bend pipe 101. The cleaning assembly also includes several second cleaning rings 12 slidably connected to the U-shaped bend pipe 101, several first branch pipes 13 respectively connected to several water supply branch pipes 801, several first spray pipes 1301 respectively connected to several first branch pipes 13, a second water supply pipe 14 connected to the chiller unit 1, several second branch pipes 15 connected to the second water supply pipe 14, and several second spray pipes 1501 respectively connected to several second branch pipes 15. Each of the water supply branch pipes 801 is equipped with a solenoid valve, which controls whether the water supply branch pipe 801 is connected to the U-shaped water storage shell 2. Each of the several second cleaning rings 12 connected to the U-shaped water storage shell 2 has one first spray pipe 1301 and one second spray pipe 1501 on each side. The second cleaning rings 12 move back and forth on the U-shaped return pipe 101 by the alternating spraying of water from the first spray pipe 1301 and the second spray pipe 1501, thereby achieving cleaning through friction between the second cleaning rings 12 and the U-shaped return pipe 101.

[0025] The waste heat segmented recovery assembly further includes a U-shaped partition 20 fixedly connected to the first isolation cover 3, the second isolation cover 4, and the third isolation cover 5, and a second drain pipe 21 communicating with the U-shaped water storage shell 2. The U-shaped partition 20 is fixedly connected to the U-shaped water storage shell 2, and the second drain pipe 21 is provided with several branch pipes, each branch pipe located above one of the U-shaped partitions 20. Through the cooperation of the first isolation cover 3, the second isolation cover 4, the third isolation cover 5, and the U-shaped partition 20, each U-shaped bend pipe 101 is individually separated, allowing the portion of each U-shaped bend pipe 101 outside the first isolation cover 3, the second isolation cover 4, and the third isolation cover 5 to individually contact the cold water entering the U-shaped water storage shell 2, achieving preheating of the water entering the first isolation cover 3, the second isolation cover 4, and the third isolation cover 5 while ensuring heat exchange efficiency.

[0026] It also includes a hollow insulation cylinder 16 installed on the connecting pipe 19 between the evaporator 102 and the expansion valve 103 in the chiller unit 1, an outlet pipe 17 connected to the hollow insulation cylinder 16, an inlet pipe 18 connected to the hollow insulation cylinder 16, and several connecting pipes 19 connected to the inlet pipe 18; wherein, each connecting pipe 19 is equipped with an electromagnetic regulating valve, and each connecting pipe 19 is connected as a branch pipe to one of the first drain pipes 7. Hot water from different first drain pipes 7 is introduced into the inlet pipe 18 through the connecting pipes 19, and then fed into the hollow insulation cylinder 16 through the inlet pipe 18 to preheat the connecting pipe between the evaporator 102 and the expansion valve 103, preventing frost formation.

[0027] The hollow insulation cylinder 16 has an annular filling groove 1601 on its inner ring surface for filling with heat-conducting mud, and a threaded groove 1602 on its inner cylinder. During installation, the annular filling groove 1601 is filled with heat-conducting mud, so that the hollow insulation cylinder 16 makes full contact with the surface of the connecting pipe between the evaporator 102 and the expansion valve 103 through the heat-conducting mud. At the same time, the threaded groove 1602 enhances the heat exchange effect and ensures the preheating effect.

[0028] When chiller unit 1 is working, the high-temperature, high-pressure gaseous refrigerant from the compressor first enters the inlet manifold. Then, the gas is evenly distributed from the inlet manifold to several parallel U-shaped bends 101. The gas enters through the inlet 1011, condenses into a liquid, and is discharged through the outlet 1012 to the liquid collection pipe. Before operation, the first water supply pipe 8 is connected to external chilled water supply equipment, and the first drain pipe 7 and the second drain pipe 21 are connected to external hot water demand equipment. During operation, chilled water is supplied through the first water supply pipe 8, ensuring that the U-shaped water storage tank 2 is always filled with water. In this state, cold water first comes into contact with the portion of the U-shaped bend 101 outside the first isolation shield 3, second isolation shield 4, and third isolation shield 5, and exchanges heat with the gas therein. This preheating process prevents the low-temperature cold water from directly exchanging heat with the high-temperature portion of the U-shaped bend 101, which could cause the U-shaped bend 101 to burst. Then, the preheated water enters the first isolation shield 3, second isolation shield 4, and third isolation shield 5 through the control valve 6, further exchanging heat with the portion of the U-shaped bend 101 inside these shields. Heat exchange is achieved through several guide plates 9 within the first isolation shroud 3, second isolation shroud 4, and third isolation shroud 5, forming an S-shaped flow channel that extends the flow path of the preheated water. This ensures condensation while enhancing heat exchange, thereby increasing the waste heat recovery rate. Simultaneously, the return spring 11 creates turbulence during water flow, further improving the heat exchange effect and enhancing the scouring of the U-shaped bend pipe 101 surface, reducing impurity adhesion and inhibiting scale formation. After heat exchange, hot water from different sections is discharged through different first drain pipes 7 and second drain pipes 21. Without secondary heating or cooling, waste heat is used to produce hot water in different temperature ranges, meeting the demand for hot water at different temperatures in actual use. A temperature sensor within the first drain pipe 7 monitors the water temperature, facilitating adjustment of the input cold water temperature and the opening of the control valve 6. This ensures effective condensation of the gas under different external temperatures, guaranteeing that the chiller unit 1 fully recovers waste heat while maintaining optimal operating conditions under varying external temperatures.

[0029] After long-term use, the surface of the U-shaped bend 101 of the chiller unit 1 should be cleaned regularly to prevent scale buildup that could affect heat exchange. During cleaning, the control valve 6 on the water supply branch pipe 801 is closed, and the water supply equipment connected to the second water supply pipe 14 and the first water supply pipe 8 is activated. First, the water supply equipment connected to the first water supply pipe 8 is started, causing water to spray out through the first spray pipe 1301 on the first branch pipe 13. This impacts the second cleaning ring 12, causing it to move along the U-shaped bend 101. The movement of the second cleaning ring 12 and its friction against the surface of the U-shaped bend 101 cleans the pipe. Then, the water supply equipment connected to the second water supply pipe 14 is activated, allowing water to flow through... The water is sprayed out through the second spray pipe 1501 on the second diversion pipe 15, which then impacts the second cleaning ring 12 from the other side, causing the second cleaning ring 12 to move in the opposite direction. This process is repeated to clean the surface of the U-shaped bend pipe 101 of the second cleaning ring 12. Then, the first drain pipe 7 is connected to a water supply device, which allows water to be pulsed into the first isolation cover 3, the second isolation cover 4, and the third isolation cover 5 through the drain branch pipe 701. This causes the water to intermittently impact the first cleaning ring 10, which, in conjunction with the elastic force of the return spring 11, causes the first cleaning ring 10 to move back and forth on the U-shaped bend pipe 101. This cleans the surface of the U-shaped bend pipe 101 through the first cleaning ring 10, preventing scale buildup and ensuring heat exchange efficiency.

[0030] In low-temperature environments, to prevent refrigerant from frosting at the starting point of the evaporator 102 and spreading further to the middle of the evaporator 102, thus affecting the operation of the chiller unit 1, the refrigerant is preheated through the hollow insulation cylinder 16 on the connecting pipe 19 between the evaporator 102 and the expansion valve 103. During preheating, the water flow rate of different first drain pipes 7 is adjusted by regulating the opening of the electromagnetic regulating valves on each connecting pipe 19 according to the outside temperature, thereby regulating the water temperature inside the hollow insulation cylinder 16 and ensuring the best preheating effect. The hollow insulation cylinder 16 exchanges heat with the heat-conducting mud in the annular filling groove 1601 and the connecting pipe 19 between the valve to ensure the heat exchange effect. The water after heat exchange is discharged through the outlet pipe 17 for unified treatment.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that variations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An industrial chiller unit with waste heat recovery, characterized in that, include: The chiller unit has a heat exchange coil composed of several U-shaped bends arranged in an equidistant array, and a U-shaped water storage shell is fixedly connected to the heat exchange coil. Several waste heat segmented recovery components are provided, each corresponding to one of the U-shaped bends. All the waste heat segmented recovery components are located inside the U-shaped water storage shell. Several first drain pipes and first water supply pipes are connected to the U-shaped water storage shell. and A number of cleaning components are provided, all of which are installed on the U-shaped bend pipe and correspond to each of the waste heat segment recovery components; The first drain pipe is provided with several drain branch pipes, and the first water supply pipe is provided with several water supply branch pipes. Each of the drain branch pipes and the water supply branch pipes corresponds to one of the waste heat segmented recovery components.

2. An industrial chiller unit with waste heat recovery according to claim 1, characterized in that, The waste heat staged recovery assembly includes: The first isolation cover is fixedly connected to the U-shaped water storage shell; The second isolation cover is fixedly connected to the first isolation cover and also fixedly connected to the U-shaped water storage shell; and The third isolation cover is fixedly connected to the second isolation cover and to the U-shaped water storage shell; The first, second, and third isolation covers are all fixedly connected to the U-shaped bend pipe, and each of them is provided with several guide plates fixedly connected to the U-shaped bend pipe. The several guide plates form an S-shaped flow channel inside the first, second, and third isolation covers.

3. An industrial chiller unit with waste heat recovery according to claim 2, characterized in that, The first isolation cover, the second isolation cover, and the third isolation cover each correspond to one of the first drainage pipes, and each of the first isolation cover, the second isolation cover, and the third isolation cover is connected to one of the drainage branch pipes.

4. An industrial chiller unit with waste heat recovery according to claim 3, characterized in that, The first, second, and third isolation covers are all made of heat-insulating material. Each of the first, second, and third isolation covers is equipped with a control valve, and the control valves are all located at positions away from the first, second, and third isolation covers and connected to the corresponding drainage branch pipes. Each of the first drainage pipes is equipped with a temperature sensor.

5. An industrial chiller unit with waste heat recovery according to claim 2, characterized in that, The first isolation cover is positioned near the air inlet of the U-shaped bend.

6. An industrial chiller unit with waste heat recovery according to claim 1, characterized in that, The cleaning assembly includes several cleaning units, each of which is connected to one of the guide plates. Each cleaning unit includes a return spring fixed to the guide plate and a first cleaning ring fixed to the return spring. The first cleaning ring is slidably connected to the U-shaped bend pipe.

7. An industrial chiller unit with waste heat recovery according to claim 6, characterized in that, The cleaning assembly also includes a plurality of second cleaning rings slidably connected to the U-shaped bend pipe, a plurality of first branch pipes respectively connected to a plurality of water supply branch pipes, a plurality of first spray pipes respectively connected to a plurality of first branch pipes, a second water supply pipe connected to the chiller unit, a plurality of second branch pipes connected to the second water supply pipe, and a plurality of second spray pipes respectively connected to a plurality of second branch pipes. Each of the water supply branch pipes is equipped with a solenoid valve, which controls whether the water supply branch pipe is connected to the U-shaped water storage shell. Each of the several second cleaning rings on each of the connections corresponds to a first water spray pipe and a second water spray pipe on both sides.

8. An industrial chiller unit with waste heat recovery according to claim 4, characterized in that, The waste heat segmented recovery assembly also includes a U-shaped partition fixedly connected to the first isolation cover, the second isolation cover and the third isolation cover, and a second drain pipe connected to the U-shaped water storage shell; The U-shaped partition is fixedly connected to the U-shaped water storage shell, and the second drain pipe is provided with several branch pipes, each of which is located above one of the U-shaped partitions.

9. An industrial chiller unit with waste heat recovery according to any one of claims 1-8, characterized in that, It also includes a hollow insulation cylinder installed on the connecting pipe between the evaporator and the expansion valve in the chiller unit, an outlet pipe connected to the hollow insulation cylinder, an inlet pipe connected to the hollow insulation cylinder, and several connecting pipes connected to the inlet pipe. Each of the connecting pipes is equipped with an electromagnetic regulating valve, and each of the connecting pipes is connected to one of the first drain pipes as a branch pipe.

10. An industrial chiller unit with waste heat recovery according to claim 9, characterized in that, The hollow insulation cylinder has an annular filling groove on its inner ring surface for filling with heat-conducting mud, and a threaded groove on its inner cylinder.

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