Dual-compressor water chiller

Abstract

The utility model belongs to refrigeration equipment technical field especially a double compressor water chiller, in view of the deficiency that existing refrigeration device single cycle, condensing space is fixed, no spare compressor, present the following scheme, it includes base, condenser, installs on the base, the inside of condenser is provided with baffle mechanism, separates condenser into two condensing interval, compressor, the number is two, installs on the condenser, links two condensing intervals, evaporimeter installs on the base, and both sides of evaporimeter are sealed and have the heat dissipation lid, and two heat dissipation lids all are set up and have the heat dissipation hole, expansion valve links condenser and evaporimeter, and condenser includes two sealing cover, two connecting tubes, condensing pipe. The utility model discloses through the cooperation of each component, the device realizes the integration of double cycle high -efficient refrigeration, condensing space as needed adjustment and compressor spare operation, and the refrigeration efficiency and equipment reliability are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, and in particular to a dual-compressor chiller unit. Background Technology

[0002] A chiller unit is a refrigeration device. In the refrigeration industry, they are divided into air-cooled and water-cooled chiller units. Based on the compressor, they are further classified into screw chiller units, scroll chiller units, and centrifugal chiller units. Compressor chiller units achieve cooling through a vapor compression refrigeration cycle. The core components include the compressor, evaporator, condenser, and expansion valve. The specific process is as follows:

[0003] The compressor draws in the low-temperature, low-pressure refrigerant gas produced by the evaporator, compresses it into a high-temperature, high-pressure gas, and delivers it to the condenser.

[0004] The condenser function involves cooling high-temperature, high-pressure gases, which then condense into room-temperature, high-pressure liquids. Condensation methods include air cooling (heat dissipation via a fan) and water cooling (heat dissipation via circulating water in a cooling tower).

[0005] The expansion valve throttles the liquid, turning it from a room-temperature, high-pressure liquid into a low-temperature, low-pressure wet vapor, which then enters the evaporator.

[0006] The evaporator absorbs heat, and the low-temperature, low-pressure refrigerant absorbs heat from the chilled water in the evaporator, vaporizing itself into a low-temperature, low-pressure gas, thus completing the refrigeration cycle.

[0007] Existing refrigeration units mostly adopt a single-cycle structure, which has limited refrigeration efficiency; the condensing space is fixed and cannot be adjusted according to the load, resulting in energy waste; and the compressor has no backup, requiring shutdown for maintenance, which affects continuous refrigeration. Utility Model Content

[0008] The purpose of this invention is to address the shortcomings of existing refrigeration devices, such as single-cycle operation, fixed condensing space, and lack of backup compressors. This invention proposes a dual-compressor chiller unit that achieves efficient dual-cycle refrigeration, allows for on-demand adjustment of the condensing space, and provides backup compressors for each other to ensure continuous refrigeration.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A dual-compressor chiller unit includes a base and further includes:

[0011] The condenser is mounted on the base and has an internal baffle mechanism that divides it into two condensation zones.

[0012] There are two compressors, which are installed on the condenser and connected to the two condensation zones.

[0013] An evaporator is mounted on the base, and both sides of the evaporator are sealed with heat dissipation covers, with heat dissipation holes opened on both heat dissipation covers.

[0014] Expansion valve connects the condenser and the evaporator.

[0015] Preferably, the condenser includes two sealing caps, two connecting pipes, and a condenser pipe. The two sealing caps are installed at both ends of the condenser by screws, and the two connecting pipes are installed on the two sealing caps and connected to the condenser.

[0016] Preferably, the two ends of the condenser tube are connected to two connecting pipes, and the condenser tube is arranged in a serpentine pattern at both ends inside the condenser and is located in two condensation zones.

[0017] Preferably, the compressor includes an intake pipe and a circulation pipe. The intake pipe is connected between the condenser and the compressor intake port. One end of the circulation pipe is connected to the compressor outlet, and the other end of the circulation pipe is connected to an expansion valve.

[0018] Preferably, the circulation pipe is located inside the evaporator and arranged in a serpentine pattern, with an outlet valve on the circulation pipe and an inlet valve on the inlet pipe.

[0019] Preferably, the partition mechanism includes an isolation ring, a partition, a sealing sliding hole, an electric cylinder, a protective cylinder, and a telescopic tube. The isolation ring is fixedly installed inside the condenser, and an isolation groove is formed on the inner wall of the isolation ring. The partition is slidably disposed in the isolation groove, and the partition is provided with a sealing sliding hole. The middle straight tube of the condenser tube is slidably connected to the sealing sliding hole.

[0020] Preferably, the protective cylinder is fixed to the sealing cover, the telescopic tube is fixed to the partition, the electric cylinder is installed inside the protective cylinder and the telescopic tube, and the output end of the electric cylinder is fixedly installed to the partition.

[0021] Preferably, a control cabinet is provided on the base, and the control cabinet is electrically connected to the electric cylinder and the compressor.

[0022] Preferably, a first sealing ring is provided on the outer side of the partition, and the first sealing ring is in sealing cooperation with the isolation groove.

[0023] Preferably, a plurality of second sealing rings are fixedly installed on the outer side of the telescopic tube, and the plurality of second sealing rings are in sealing cooperation with the protective cylinder.

[0024] Preferably, the base is provided with a support for supporting the condenser, compressor, and evaporator.

[0025] Preferably, the compressor has a base at its bottom, which is mounted on top of the condenser.

[0026] Compared with the prior art, the advantages of this utility model are:

[0027] 1. Gas enters the condenser tubes of the condenser and exchanges heat with the condenser in the serpentine arrangement of the condenser tubes. The pre-stored condensate inside the condenser evaporates and is converted into gas. The gas is compressed by the compressor. The compressed gas is serpentine in the evaporator through the circulation pipe and evaporates into liquid. The liquid is depressurized by the expansion valve and then enters the condenser for recycling.

[0028] 2. The electric cylinder drives the partition to move, adjusting the effective heat exchange length of the condenser tube, changing the condensing space, and adapting to different refrigeration loads. The effective condensing space of the condenser can be adjusted according to the refrigeration load, improving energy utilization and avoiding energy waste.

[0029] 3. Two compressors form a dual-cycle system, which provides highly efficient cooling. The dual-cycle system improves cooling efficiency compared to a single-cycle system. Furthermore, they serve as backups for each other. If one compressor fails, the other can continue to operate, ensuring continuous cooling. There is no need to stop the machine during maintenance.

[0030] This invention has a simple structure. Through the synergistic effect of its components, the device achieves integrated dual-cycle high-efficiency refrigeration, on-demand adjustment of the condensing space, and standby operation of the compressor, which greatly improves refrigeration efficiency and equipment reliability. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0032] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;

[0033] Figure 3 This is a schematic diagram of the internal side view of the present invention;

[0034] Figure 4 This is a schematic diagram of the connection structure between the compressor and the circulation pipe;

[0035] Figure 5 This is a schematic diagram of the internal condenser tube layout;

[0036] Figure 6 This is a structural diagram of the condenser tube, sealing cap, isolation ring, and partition.

[0037] Figure 7 This is a schematic diagram of the exploded structure of the partition mechanism;

[0038] Figure 8 This is a schematic diagram of the structure of the telescopic tube and the protective cylinder.

[0039] In the diagram: 1. Base; 11. Support base; 12. Control cabinet; 2. Condenser; 21. Sealing cap; 22. Connecting pipe; 23. Condenser pipe; 3. Compressor; 31. Inlet pipe; 32. Inlet valve; 33. Circulation pipe; 34. Outlet valve; 35. Base; 4. Evaporator; 41. Heat dissipation cap; 42. Heat dissipation hole; 5. Expansion valve; 6. Baffle mechanism; 61. Isolation ring; 62. Isolation groove; 63. Baffle; 64. First sealing ring; 65. Sealing slide hole; 66. Electric cylinder; 67. Protective cylinder; 68. Telescopic pipe; 69. Second sealing ring. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0041] Example 1

[0042] Reference Figure 1-8 A dual-compressor chiller unit includes a base 1, a condenser 2, a compressor 3, an evaporator 4, and an expansion valve 5. The condenser 2 is mounted on the base 1 and has a partition mechanism 6 inside, which divides the condenser 2 into two condensation zones. Two compressors 3 are mounted on the condenser 2 and connected to the two condensation zones. The evaporator 4 is mounted on the base 1 and has heat dissipation covers 41 on both sides. Each heat dissipation cover 41 has heat dissipation holes 42. The expansion valve 5 connects the condenser 2 and the evaporator 4, and depressurizes and cools the condensed liquid so that it can evaporate quickly after entering the evaporator 4.

[0043] Specifically, the heat dissipation cover 41 protects the internal structure, and the heat dissipation holes 42 are used to dissipate heat during the evaporation process.

[0044] Reference Figure 1 , Figure 2 In this embodiment, the condenser 2 includes two sealing caps 21, two connecting pipes 22, and a condensing pipe 23. The two sealing caps 21 are installed at both ends of the condenser 2 by screws. The two connecting pipes 22 are installed on the two sealing caps 21 and connected to the condenser 2. The two ends of the condensing pipe 23 are connected to the two connecting pipes 22. The condensing pipe 23 is arranged in a serpentine pattern at both ends inside the condenser 2 and is located in two condensation zones.

[0045] Specifically, the condenser tubes 23 are arranged in a serpentine pattern at both ends inside the condenser 2 to increase the heat exchange area, and the middle is a straight tube for the adjustment of the baffle mechanism; the connecting pipe 22 is used to introduce the gas to be cooled.

[0046] Reference Figure 4In this embodiment, the compressor 3 includes an intake pipe 31 and a circulation pipe 33. The intake pipe 31 is connected between the condenser 2 and the intake port of the compressor 3. One end of the circulation pipe 33 is connected to the outlet of the compressor 3, and the other end of the circulation pipe 33 is connected to the expansion valve 5. The circulation pipe 33 is partially located inside the evaporator 4 and is arranged in a serpentine pattern. An outlet valve 34 is provided on the circulation pipe 33, and an intake valve 32 is provided on the intake pipe 31. A base 35 is provided at the bottom of the compressor 3, and the base 35 is installed on the top of the condenser 2.

[0047] Specifically, the circulation pipe 33 is located within the evaporator 4 and arranged in a serpentine pattern to achieve evaporative heat exchange; the outlet valve 34 controls the discharge of compressed gas; and the base 35 ensures the stable installation of the compressor 3. The two compressors 3 serve as backups for each other, so that if one fails, the other can continue to operate, ensuring continuous cooling.

[0048] Reference Figures 5-8 In this embodiment, the partition mechanism 6 includes an isolation ring 61, a partition 63, a sealing sliding hole 65, an electric cylinder 66, a protective cylinder 67, and a telescopic tube 68. The isolation ring 61 is fixedly installed inside the condenser 2, and an isolation groove 62 is formed on the inner wall of the isolation ring 61. The partition 63 is slidably disposed in the isolation groove 62, and the partition 63 is provided with a sealing sliding hole 65. The middle straight tube of the condenser tube 23 is slidably connected to the sealing sliding hole 65. The protective cylinder 67 is fixed to the sealing cap 21. The telescopic tube 68 is fixed to the partition 63. The electric cylinder 66 is disposed inside the protective cylinder 67 and the telescopic tube 68. The output end of the electric cylinder 66 is fixedly installed to the partition 63. A first sealing ring 64 is provided on the outer side of the partition 63, and the first sealing ring 64 is sealed to the isolation groove 62. Multiple second sealing rings 69 are fixedly installed on the outer side of the telescopic tube 68, and the multiple second sealing rings 69 are sealed to the protective cylinder 67.

[0049] Specifically, the sealing sliding hole 65 of the partition 63 allows the middle straight pipe of the condenser tube 23 to pass through; the electric cylinder 66 drives the partition 63 to move within the isolation groove 62 to adjust the condensation space of the condenser 2; the protective cylinder 67 is fixed to the sealing cover 21, and the telescopic tube 68 is fixed to the partition 63 and extends and retracts within the protective cylinder 67, and is sealed by the second sealing ring 69 to ensure the sealing of the condenser 2 during the adjustment process.

[0050] Reference Figure 1 , Figure 2 In this embodiment, a control cabinet 12 is provided on the base 1, and the control cabinet 12 is electrically connected to the electric cylinder 66 and the compressor 3.

[0051] Reference Figure 1-8 In this embodiment, the base 1 is provided with a support seat 11 for supporting the condenser 2, the compressor 3, and the evaporator 4.

[0052] Specifically, the base 1 serves as the basic load-bearing component of the equipment, and is equipped with a support seat 11 to support the condenser 2, compressor 3, and evaporator 4. The control cabinet 12 is installed on the top to centrally control the operation of the equipment.

[0053] Working principle: The equipment is assembled by mounting the condenser 2, two compressors 3, and evaporator 4 on the support base 11 of the base 1. The condenser 2, compressors 3, expansion valve 5, and evaporator 4 are connected by pipes to form a refrigeration cycle.

[0054] Install the partition mechanism 6: Fix the isolation ring 61 inside the condenser 2, install the partition 63 into the isolation groove 62, and pass the middle straight tube of the condenser tube 23 through the sealing sliding hole 65; fix the protective cylinder 67 to the sealing cover 21, fix the telescopic tube 68 to the partition 63, and connect the electric cylinder 66 to the control cabinet 12.

[0055] In refrigeration operation, control cabinet 12 is started. Gas enters condenser 23 through connecting pipe 22 for cooling. The condensate inside the condenser is heated and converted into gas, which then enters compressor 3. After being compressed by compressor 3, it is transported by circulation pipe 33 and evaporates in evaporator 4. After evaporating heat, it changes from gas to liquid. After being depressurized by expansion valve 5, it re-enters condenser 2 for circulation. Electric cylinder 66 adjusts the position of baffle 63 in isolation tank 62 to change the condensation space of condenser 2. The two compressors 3 serve as backups for each other.

[0056] According to the cooling load, the control cabinet 12 controls the electric cylinder 66 to adjust the position of the partition 63, thereby changing the effective condensing space of the condenser 2 to adapt to the load requirements; if one compressor 3 fails, it switches to another compressor 3 to continue running, ensuring continuous cooling.

[0057] For equipment maintenance, after shutdown, the faulty compressor 3 can be repaired separately, while another compressor 3 is kept on standby. After the repair is completed, dual-cycle operation is restored. The sealing of the baffle mechanism 6 is checked regularly to ensure that there is no leakage during the condensation process.

[0058] Example 2

[0059] In this embodiment, the difference between Embodiment 2 and Embodiment 1 is that: a vibration damping and sound insulation component is provided between the base 35 of the compressor 3 and the base 1; the vibration damping and sound insulation component includes a composite vibration damping pad and a sound insulation cover; the composite vibration damping pad is a rubber-metal spring composite structure, and the sound insulation cover is a double-layer sound insulation board filled with sound-absorbing cotton in the middle.

[0060] The composite shock-absorbing pad effectively absorbs the vibration energy of the compressor, preventing vibration from being transmitted to the pipes and base, and avoiding pipe loosening and leakage; the soundproof cover blocks the aerodynamic and mechanical noise of the compressor, reducing the operating noise of the equipment and improving the working environment. All structures in this application can be selected in terms of material and length according to actual use. The attached drawings are schematic structural diagrams, and the actual dimensions can be adjusted appropriately.

[0061] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A dual-compressor chiller unit, comprising a base (1), characterized in that, Also includes: A condenser (2) is installed on a base (1). The condenser (2) is equipped with a partition mechanism (6) to divide the condenser (2) into two condensation zones. Two compressors (3) are installed on the condenser (2) and connected to the two condensing zones; An evaporator (4) is installed on the base (1). Both sides of the evaporator (4) are sealed with heat dissipation covers (41), and heat dissipation holes (42) are opened on both heat dissipation covers (41). Expansion valve (5) connects condenser (2) and evaporator (4).

2. The dual-compressor chiller unit according to claim 1, characterized in that, The condenser (2) includes two sealing caps (21), two connecting pipes (22), and a condenser tube (23). The two sealing caps (21) are installed at both ends of the condenser (2) by screws. The two connecting pipes (22) are installed on the two sealing caps (21) and connected to the condenser (2). The two ends of the condenser tube (23) are connected to the two connecting pipes (22). The condenser tube (23) is arranged in a serpentine pattern at both ends inside the condenser (2) and is located in two condensation zones.

3. A dual-compressor chiller unit according to claim 1, characterized in that, The compressor (3) includes an intake pipe (31) and a circulation pipe (33). The intake pipe (31) is connected between the condenser (2) and the intake port of the compressor (3). One end of the circulation pipe (33) is connected to the outlet of the compressor (3), and the other end of the circulation pipe (33) is connected to the expansion valve (5). Part of the circulation pipe (33) is located inside the evaporator (4) and is arranged in a serpentine pattern. An outlet valve (34) is provided on the circulation pipe (33), and an intake valve (32) is provided on the intake pipe (31).

4. A dual-compressor chiller unit according to claim 2, characterized in that, The partition mechanism (6) includes an isolation ring (61), a partition (63), an electric cylinder (66), a protective cylinder (67), and a telescopic tube (68). The isolation ring (61) is fixedly installed inside the condenser (2). An isolation groove (62) is provided on the inner wall of the isolation ring (61). The partition (63) is slidably disposed in the isolation groove (62). The partition (63) is provided with a sealing sliding hole (65). The middle straight tube of the condenser tube (23) is slidably connected to the sealing sliding hole (65).

5. A dual-compressor chiller unit according to claim 4, characterized in that, The protective cylinder (67) is fixedly connected to the sealing cover (21), the telescopic tube (68) is fixedly connected to the partition (63), the electric cylinder (66) is installed inside the protective cylinder (67) and the telescopic tube (68), and the output end of the electric cylinder (66) is fixedly installed to the partition (63).

6. A dual-compressor chiller unit according to claim 4, characterized in that, A first sealing ring (64) is provided on the outer side of the partition (63), and the first sealing ring (64) is sealed to the isolation groove (62).

7. A dual-compressor chiller unit according to claim 4, characterized in that, Multiple second sealing rings (69) are fixedly installed on the outside of the telescopic tube (68), and the multiple second sealing rings (69) are sealed and fitted with the protective cylinder (67).

8. A dual-compressor chiller unit according to claim 4, characterized in that, A control cabinet (12) is provided on the base (1), and the control cabinet (12) is electrically connected to the electric cylinder (66) and the compressor (3).

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