Water chilling unit for annual refrigeration

Abstract

The utility model discloses a water chilling unit for full-year refrigeration, which is characterized in that integrated combined connecting pieces such as a water chilling unit, a chilled water supply and return water module, an energy-saving pipeline switching module, a cooling water supply and return water module, a box body base, a cooling tower, a crawling ladder and a side ladder are recombined, and the cooling tower is arranged at the upper part of a box body, so that the overall plane structure size of the unit is reduced; the main engine unit and the main engine unit are mounted in the container with the standardized size, so that the standardized structure, the standardized size and the standardized mounting of the product are realized, and the advantages of high efficiency and low cost are achieved; in the operation process, a natural cold source of outdoor low-temperature air in winter is effectively utilized, and the purpose of efficient and energy-saving operation is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of comprehensive utilization of clean energy, and in particular to an integrated year-round refrigeration chiller and an operation control method. Background Art

[0002] As we all know, in data center computer rooms, mushroom breeding, electronics, chemical and other production workshops, refrigeration is required throughout the year to meet the technical requirements of process and production. Therefore, a large amount of cold sources are needed to ensure the normal operation of computer room equipment and production process air-conditioning systems.

[0003] Integrated water-cooled chillers are widely used as the main core equipment for providing cold sources due to their ease of transportation and installation and their high COP value. However, in extremely cold areas, the low outdoor temperature in winter causes ice to form on the surface of the cooling tower filler and the freezing of the heat exchanger pipes, affecting the normal operation of the air-conditioning system, equipment, and process production. Since the outdoor temperature in winter is lower than the inlet and outlet water temperature set for conventional units, the unit is prone to low pressure alarms, pressure difference alarms and other faults when it is restarted after being shut down for a period of time, and cannot start normally, resulting in low energy efficiency of the air-conditioning system or even failure to operate normally, and the low-temperature natural cold source in the outdoor air cannot be effectively utilized.

[0004] In view of the shortcomings of existing technologies, as a research and development unit of clean energy comprehensive utilization air-conditioning systems and equipment, how to transform and innovate existing systems and equipment to make them have better energy-saving and stable performance is a technical problem that needs to be solved urgently in this field. Utility Model Content

[0005] In order to solve the deficiencies in the prior art, the purpose of the utility model is to provide a water chiller for year-round refrigeration and an operation control method thereof which is simple in structure, efficient, energy-saving and reliable.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A chiller for year-round refrigeration, comprising a chiller in a box, a chilled water supply and return module, an energy-saving pipeline switching module, a cooling water supply and return module, and a cooling tower; the chiller for year-round refrigeration has two operating modes: refrigeration and energy-saving;

[0008] The utility model is an integrated box structure, using BIM three-dimensional model design and construction technology, and adopting modular and integrated assembly technology. The chiller is respectively connected to the energy-saving pipeline switching module, the chilled water supply and return module, and the cooling water supply and return module. The cooling tower is fixed on the top of the box, and is connected to the cooling water outlet pipe in the cooling water supply and return module through the cooling tower return pipe, and is connected to the cooling water return pipe in the cooling water supply and return module through the cooling tower supply pipe;

[0009] The chilled water supply and return module comprises: a chilled water return pipe and a chilled water supply pipe connected to the chiller, a chilled water return pipe is provided with a chilled pump and a descaling device, the end of the chilled water return pipe extends to the outside and is provided with a chilled inlet; a constant pressure tank is provided in the middle section of the chilled water supply pipe, and a chilled outlet is provided at the end; a water supply pipe is provided on the side of the chilled water return pipe;

[0010] The energy-saving pipeline switching module includes: a cooling water control valve and an energy-saving return water switching tee on the cooling water outlet pipe, an energy-saving return water switching pipe is provided on the energy-saving return water switching tee, an energy-saving return water switching control valve is provided on the energy-saving return water switching pipe, an energy-saving water supply switching connecting pipe is connected to the refrigerated water supply pipe, an energy-saving water supply switching connecting pipe is provided with an energy-saving water supply switching control valve and an energy-saving water supply tee, and the energy-saving water supply tee is connected to the cooling water supply and return water module;

[0011] The cooling water supply and return module includes: a cooling water outlet pipe, a cooling water inlet pipe and a cooling water return pipe. The cooling water inlet pipe is provided with a cooling pump and a flexible joint. The cooling water inlet pipe is connected to an energy-saving water supply tee. The energy-saving water supply tee is also connected to a cooling water return pipe. The cooling water return pipe is connected to a desludger. The end of the cooling water return pipe is a cooling return port flange.

[0012] The compressor in the chiller is a special refrigeration compressor such as a conventional scroll compressor, a screw compressor, a centrifugal compressor, etc.

[0013] The ladder is fixed on the side of the outer shell of the cooling tower.

[0014] The side ladder is fixed on the side of the outer shell of the box body.

[0015] The chiller, the chilled water supply and return module, the energy-saving pipeline switching module, the cooling water supply and return module, the cooling tower, the ladder and the side ladder are integrated combined connectors.

[0016] The cooling tower is a cross-flow, counter-flow all-steel or glass fiber reinforced plastic closed cooling tower of conventional structure.

[0017] The closed cooling tower adopts a pre-cooling heat dissipation filler and a heat exchange coil to cooperate with the heat dissipation structure, and the cooling fluid pipeline flow is a serpentine coil structure.

[0018] The beneficial effects of the utility model are as follows: the utility model has a reasonable structural design, and through the reorganization of the integrated combination connectors such as the chiller, the chilled water supply and return module, the energy-saving pipeline switching module, the cooling water supply and return module, the box base, the cooling tower, the ladder, the side ladder, etc., the cooling tower is arranged on the upper part of the box to reduce the overall plane structure size of the unit, and it is installed together with the main unit in a container of standardized size, thereby realizing the standardized structure, standardized size and standardized installation of the product, and has the advantages of high efficiency and low cost; during its operation, it effectively utilizes the natural cold source of the outdoor low-temperature air in winter to achieve the purpose of efficient and energy-saving operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the internal cross-sectional structure of the box body of the present utility model.

[0021] Figure 2 This is the right view of the unit of the utility model

[0022] In the figure: 1. Chiller, 2. Box, 3. Chilled water supply and return module, 31. Chilled pump, 32. Constant pressure tank, 33. Descaling instrument, 34. Chilled return pipe, 35. Chilled water supply pipe, 36. Make-up pipe, 37. Chilled inlet, 38. Chilled outlet, 4. Energy-saving pipeline switching module, 41. Cooling water control valve, 42. Energy-saving return water switching tee, 43. Energy-saving return water switching control valve, 44. Energy-saving return water switching connecting pipe, 45. Energy-saving water supply tee, 46. Energy-saving water supply switching control valve, 4 7. Energy-saving water supply switching connecting pipe, 48. Chilled water control valve, 5. Cooling water supply and return module, 51. Cooling water inlet pipe, 52. Cooling water outlet pipe, 53. Cooling water return pipe, 54. Cooling outlet flange, 55. Cooling return flange, 56. Cooling pump, 57. Decontamination device, 58. Flexible joint, 6. Box base, 7. Cooling tower, 71. Cooling tower inlet flange, 72. Cooling tower water supply pipe, 73. Cooling tower outlet flange, 74. Cooling tower return pipe, 8. Ladder, 9. Side ladder. DETAILED DESCRIPTION

[0023] The present invention is shown in the accompanying drawings. The following is an explanation of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0024] like Figures 1-2As shown: a chiller for year-round cooling, characterized in that: the integrated year-round cooling chiller is based on the principle structure of a traditional, conventional integrated chiller, with an energy-saving pipeline switching module 4 and energy-saving operation control logic added to reasonably utilize the natural energy cooling capacity of outdoor low-temperature air in winter to achieve high efficiency and energy saving.

[0025] The chiller for year-round refrigeration is an integrated design, box-type, standard, integrally assembled energy station unit, including a chiller box 2, a chilled water supply and return module 3, an energy-saving pipeline switching module 4, a cooling water supply and return module 5, a box base 6, a cooling tower 7, a ladder 8, and a side ladder 9. The chilled water supply and return module 3, the energy-saving pipeline switching module 4, the cooling water supply and return module 5, the box base 6, the cooling tower 7, the ladder 8, and the side ladder 9 are an integrated structure of combined connectors.

[0026] The chiller 1, box 2, chilled water supply and return module 3, energy-saving pipeline switching module 4, cooling water supply and return module 5, box base 6, cooling tower 7, ladder 8, and side ladder 9 are designed, manufactured, and constructed using BIM three-dimensional model technology, and adopt equipment assembly module integration, system control integration, and pipeline valve and pipe fitting system integration assembly technology to connect and assemble each module into an independent module monomer.

[0027] This year-round cooling chiller has two operating modes: cooling and energy-saving. The chiller 1 is a water-cooled scroll chiller or a water-cooled screw chiller or a water-cooled centrifugal chiller that has the function of independent operation and providing chilled water. This embodiment is used as a preferred technical solution, and the chiller 1 is a small water-cooled screw or scroll chiller.

[0028] The box body 2 is a frame-type box body structure, and its width and height dimensions adopt the width and height dimensions of the standard container outer shape, and its length dimension adopts a modular geometric combination of the length of the standard container box body, so as to match the on-site construction of the unit transport aircraft and the plane layout of the storage site.

[0029] The chiller 1, the chilled water supply and return module 3, the energy-saving pipeline switching module 4, and the cooling water supply and return module 5 are arranged inside the box 2; the bottom or base of the chiller 1, the chilled water supply and return module 3, the energy-saving pipeline switching module 4, and the cooling water supply and return module 5 are connected to the base of the box 2 by a slot or a socket-type structure connection fixing piece to facilitate connection and installation.

[0030] The chilled water supply and return module 3 includes: a chilled water return pipe 34 and a chilled water supply pipe 35 connected to the chiller 1, a chilled water return pipe 34 is provided with a chilled pump 31 and a descaling device 33, the end of the chilled water return pipe 34 extends to the outside and is provided with a chilled inlet 37; a constant pressure tank 32 is provided in the middle section of the chilled water supply pipe 35, and a chilled outlet 38 is provided at the end; a water supply pipe 36 is provided on the side of the chilled water return pipe 34.

[0031] The energy-saving pipeline switching module 4 includes: a cooling water control valve 41 and an energy-saving return water switching tee 42 on the cooling water outlet pipe 52, an energy-saving return water switching pipe 44 is provided on the energy-saving return water switching tee 42, an energy-saving return water switching control valve 43 is provided on the energy-saving return water switching pipe 44, an energy-saving water supply switching connecting pipe 47 is connected to the refrigerated water supply pipe 35, an energy-saving water supply switching connecting pipe 47 is provided with an energy-saving water supply switching control valve 46 and an energy-saving water supply tee 45, and the energy-saving water supply tee 45 is connected to the cooling water supply and return module 5;

[0032] The cooling water supply and return module 5 includes: a cooling water outlet pipe 52, a cooling water inlet pipe 51 and a cooling water return pipe 53. The cooling water inlet pipe 51 is provided with a cooling pump 56 and a flexible joint 58. The cooling water inlet pipe 51 is connected to the energy-saving water supply tee 45. The energy-saving water supply tee 45 is also connected to the cooling water return pipe 53. The cooling water return pipe 53 is connected to a desludging device 57. The end of the cooling water return pipe 53 is a cooling return port flange 55.

[0033] The box base 6 is arranged at the bottom of the box 2, and the upper end surface of the base is provided with a slot or a socket-type structural connection fixing piece connected to the four vertical surfaces of the box 2. The upper end surface or plane of the box base 6 is provided with a slot or a socket-type structural connection fixing piece connected to the bottom or base of the chiller 1, the chilled water supply and return module 3, the energy-saving pipeline switching module 4, and the cooling water supply and return module 5, so as to facilitate connection and installation.

[0034] The cooling tower 7 is placed on the upper part of the box body 2, and its bottom or base is provided with a slot or a socket-type structure connection fixture connected to the top plate of the box body 2 to facilitate connection and installation.

[0035] The cooling tower 7 includes: a cooling tower inlet flange 71, a cooling tower water supply pipe 72, a cooling tower outlet flange 73, a cooling tower return pipe 74 and other matching valves, pipes, supports and hangers and other connecting fixtures; the ladder 8 is fixed to the side of the outer shell of the cooling tower 7; the side ladder 9 is fixed to the side of the outer shell of the box body 2.

[0036] The chilled water supply pipe 35 of the chilled water supply and return module 3 at the evaporator outlet of the chiller 1 and the horizontal pipe are provided with a tee and connected to the energy-saving water supply switching connecting pipe 47 .

[0037] An energy-saving water supply tee 45 is provided on the cooling return water horizontal pipeline at the front end of the suction port of the cooling water pump 56 in the cooling water supply and return module 5 and is connected to the freezing water supply pipe 35 through an energy-saving water supply switching connecting pipe 47 .

[0038] A tee is provided on the chilled water return pipe 3 at the front end of the outlet of the chilled water pump 31 of the chilled water supply and return module 3 and is connected to the cooling water outlet pipe 52 at the front end of the condenser outlet of the chiller 1 through the energy-saving return water switching pipe 44 and the energy-saving return water switching tee 42.

[0039] Preferably, a cooling water control valve 41 is provided at the front end of the water inlet and outlet of the condenser of the chiller 1, and a chilled water control valve 48 is provided at the front end of the water inlet and outlet of the evaporator.

[0040] Preferably, the refrigeration power of the chiller 1 is ≤300RT, so as to facilitate standardized production, transportation, hoisting, and construction site layout; the compressor of the chiller 1 adopts a single, double, or multiple scroll compressors in parallel, or a single or double screw compressor in parallel structure.

[0041] Preferably, the cooling tower 7 is placed on the upper part of the box 2 to reduce the pressure head of the cooling circulating water pump 31 and the cooling pump 56 and the overall floor space of the unit. The cooling tower 7 is a conventional cross-flow, counter-flow all-steel or glass fiber reinforced plastic closed cooling tower; the closed cooling tower 7 adopts a pre-cooling heat dissipation filler and a heat exchange coil to cooperate with the heat dissipation structure, and the cooling fluid pipeline flow is a serpentine coil structure.

[0042] Preferably, the cooling water control valve 41, the energy-saving return water switching control valve 43, the energy-saving water supply switching control valve 46, and the chilled water control valve 48 are electric two-way valves, which are interlocked and controlled according to the control logic of the unit's electrical control panel.

[0043] The specific control logic and pipeline flow of the operating state of the utility model are as follows:

[0044] Operation principle of the unit's refrigeration condition: In summer and the transitional seasons of spring and autumn, the heat load in the data center's computer room and process workshop is relatively large, and refrigeration condition operation is required. According to the working principle of the reverse Carnot thermal cycle, the cooling tower 7 is used as a cooling device for the condenser of the chiller 1 to cool the high-temperature cooling water in the condenser to achieve the normal condensing temperature setting value of the chiller 1.

[0045] The operating principle of the unit's energy-saving condition: In winter, the outdoor temperature is significantly lower than the air temperature in the data center room and process workshop. The heat load demand in the data center room and process workshop is relatively small. The higher-temperature chilled water in the air-conditioning water system directly enters the serpentine heat exchange tube of the cooling tower 7, and is directly cooled after heat exchange with the outdoor low-temperature air through the cooling tower 7, so as to effectively utilize the cold source of the outdoor low-temperature air to achieve the purpose of energy saving.

[0046] The unit's refrigeration operating condition operation control logic: chiller 1, chilled water supply and return module 3, energy-saving pipeline switching module 4, cooling water supply and return module 5, cooling tower 7, circulating water pump 31, cooling pump 56 are running; cooling water control valve 41 and chilled water control valve 48 are opened, and energy-saving return water switching control valve 43 and energy-saving water supply switching control valve 46 are closed.

[0047] The energy-saving operation control logic of the unit: borrow part of the pipeline flow of the chilled water supply and return module 3 and the cooling water supply and return module 5: the energy-saving pipeline switching module 4 and the cooling tower 7, the chilled water pump 31 are started and run; the chiller 1 and the cooling pump 56 are stopped; the cooling water control valve 41 and the chilled water control valve 48 are closed, and the energy-saving return water switching control valve 43 and the energy-saving water supply switching control valve 46 are opened.

[0048] Chilled water flow path of the unit energy-saving operation: The chilled water with a higher temperature in the air-conditioning water system enters the chilled water supply and return module 3 through the chilled water inlet 37, flows through the chilled return pipe 34, the chilled pump 31 pressurized and diverted into the energy-saving return water switching pipe 44 and the energy-saving return water switching control valve 43, and then is connected to the cooling water outlet pipe 52 of the chiller 1 through the energy-saving return water switching tee 42, and then enters the cooling tower 7 through the cooling outlet flange 54, the cooling tower water supply pipe 72, and the cooling tower inlet flange 71. The serpentine heat exchange tubes in the part are used for cooling; the chilled water with a lower temperature after cooling enters the cooling tower return pipe 74 through the cooling tower outlet flange 73, and then passes through the cooling return water inlet flange 55, the cooling water return pipe 53 of the cooling supply and return water pipeline module 5, and then is regulated and controlled by the energy-saving reducer water supply tee 45 and the energy-saving water supply switching control 46, and then passes through the energy-saving water supply switching connecting pipe 47 and flows into the chilled water supply pipe 35 of the chilled water supply and return water pipeline module 3, and then enters the water supply pipeline of the air-conditioning system through the chilled water outlet 38.

[0049] The above description is only a preferred implementation mode of the present utility model. As long as the technical solution of the purpose of the present utility model is achieved by basically the same means, it belongs to the protection scope of the present utility model.

Claims

1. A chiller for year-round refrigeration, characterized in that: It includes a chiller in the box, a chilled water supply and return module, an energy-saving pipeline switching module, a cooling water supply and return module, and a cooling tower; The chiller is connected to the energy-saving pipeline switching module, the chilled water supply and return module, and the cooling water supply and return module respectively. The cooling tower is fixed on the top of the box body, and is connected to the cooling water outlet pipe in the cooling water supply and return module through the cooling tower return pipe, and is connected to the cooling water return pipe in the cooling water supply and return module through the cooling tower supply pipe; The chilled water supply and return module comprises: a chilled water return pipe and a chilled water supply pipe connected to the chiller, a chilled water return pipe is provided with a chilled pump and a descaling device, the end of the chilled water return pipe extends to the outside and is provided with a chilled inlet; a constant pressure tank is provided in the middle section of the chilled water supply pipe, and a chilled outlet is provided at the end; a water supply pipe is provided on the side of the chilled water return pipe; The energy-saving pipeline switching module includes: a cooling water control valve and an energy-saving return water switching tee on the cooling water outlet pipe, an energy-saving return water switching pipe is provided on the energy-saving return water switching tee, an energy-saving return water switching control valve is provided on the energy-saving return water switching pipe, an energy-saving water supply switching connecting pipe is connected to the refrigerated water supply pipe, an energy-saving water supply switching connecting pipe is provided with an energy-saving water supply switching control valve and an energy-saving water supply tee, and the energy-saving water supply tee is connected to the cooling water supply and return water module; The cooling water supply and return module includes: a cooling water outlet pipe, a cooling water inlet pipe and a cooling water return pipe. The cooling water inlet pipe is provided with a cooling pump and a flexible joint. The cooling water inlet pipe is connected to an energy-saving water supply tee. The energy-saving water supply tee is also connected to a cooling water return pipe. The cooling water return pipe is connected to a desludger. The end of the cooling water return pipe is a cooling return port flange.

2. A year-round refrigeration chiller as claimed in claim 1, characterized in that: The compressor in the chiller is a conventional scroll compressor, a screw compressor or a centrifugal compressor.

3. A year-round refrigeration chiller as claimed in claim 1, characterized in that: The chiller, the chilled water supply and return module, the energy-saving pipeline switching module, the cooling water supply and return module, the cooling tower, the ladder and the side ladder are integrated combined connectors.

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