An adjustable chilled water system

Abstract

The utility model relates to the technical field of heating and ventilation facilities in manufacturing industry, especially a kind of adjustable chilled water system, including refrigerating unit, main water tank and the main output pipe and main backflow pipe of the main water tank intercommunication, one section of the main backflow pipe enters refrigerating unit to carry out heat exchange, the working pipe network is connected between the main output pipe and main backflow pipe, still include the first auxiliary water tank for assisting main water tank cooling and the second auxiliary water tank for assisting main water tank heating.

Description

Technical Field

[0001] This utility model relates to the field of HVAC facilities technology in the manufacturing industry, and in particular to an adjustable chilled water system. Background Technology

[0002] In existing technologies, manufacturing workplaces, such as those producing biomedicine, are designed with internal heating and ventilation systems (HVAC) because regulating indoor temperature is crucial, especially the cooling system, which is essential for maintaining low temperatures in such environments.

[0003] Therefore, the design of the chilled water system in an air conditioning system is quite important. The temperature rise and fall of the chilled water directly affect the cooling effect and operating quality of the chilled water equipment, and indirectly affect the output of HVAC systems, as well as the influence of temperature and humidity.

[0004] Existing technologies generally only establish chilled water storage pipelines, and the chilled water storage capacity is not adjustable. The difference in water storage capacity makes it impossible to achieve high-efficiency and high-quality operation under the special conditions of HVAC use, and it cannot be well controlled and regulated. Summary of the Invention

[0005] The purpose of this invention is to provide an adjustable chilled water system.

[0006] The above-mentioned objective of this utility model is achieved through the following technical solution: an adjustable chilled water system, including a chiller unit, a main water tank, and a main output pipe and a main return pipe connected to the main water tank. One section of the main return pipe enters the chiller unit for heat exchange. A working pipe network is connected between the main output pipe and the main return pipe. The system also includes a first auxiliary water tank for assisting the cooling of the main water tank and a second auxiliary water tank for assisting the heating of the main water tank.

[0007] As a preferred embodiment of this invention, during operation, the water temperature of the first auxiliary water tank is less than or equal to the water temperature of the main water tank, and the water temperature of the second auxiliary water tank is higher than the water temperature of the main water tank.

[0008] As a preferred embodiment of this utility model, a main variable frequency output water pump is connected to the main output pipe, a first auxiliary output pipe is connected between the first auxiliary water tank and the section of the main output pipe located at the entrance of the main variable frequency output water pump, a first auxiliary return pipe is connected between the first auxiliary water tank and the middle section of the main return pipe, and the first auxiliary return pipe also passes through a refrigeration unit for heat exchange, and the refrigeration unit has an evaporator.

[0009] As a preferred embodiment of this utility model, a second auxiliary output pipe is connected between the second auxiliary water tank and the section of the main output pipe located at the entrance of the main variable frequency output water pump, and a second auxiliary return pipe is connected between the second auxiliary water tank and the middle section of the main return pipe.

[0010] As a preferred embodiment of this utility model, the working pipeline network includes a water distributor connected to the outlet of the main output pipe, a water collector connected to the inlet of the main return pipe, and several working branch pipes connected between the water distributor and the water collector.

[0011] As a preferred embodiment of this utility model, the first auxiliary water tank is connected to a self-circulating cooling pipe with both its inlet and outlet connected thereto. The self-circulating cooling pipe also passes through a refrigeration unit for heat exchange, and a circulation pump is connected to the pipeline of the self-circulating cooling pipe.

[0012] As a preferred embodiment of this invention, the main water tank, the first auxiliary water tank, and the second auxiliary water tank are all connected to an injection pipe and a drain pipe.

[0013] As a preferred embodiment of this invention, the volumes of the first auxiliary water tank and the second auxiliary water tank are both half the volume of the main water tank.

[0014] As a preferred embodiment of this invention, during operation, the water volume in the main water tank, the first auxiliary water tank, and the second auxiliary water tank is all less than 30% of their respective volumes.

[0015] As a preferred embodiment of this utility model, the main return pipe is in a high position, and the main water tank, the first auxiliary water tank, and the second auxiliary water tank are in a low position. It also includes solenoid valves and air vents installed on the corresponding pipelines.

[0016] The beneficial effects of this utility model are: it can be used for the flexible adjustment of HVAC chilled water pipe networks, and can better regulate the temperature and flow of chilled water for HVAC systems, thereby achieving high-quality system operation and improving system safety. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the chilled water system in the embodiment; Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure from another perspective. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

[0019] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present utility model.

[0020] Examples, such as Figure 1 , 2As shown, an adjustable chilled water system includes a chiller unit 2, a main water tank 1, and a main output pipe 11 and a main return pipe 12 connected to the main water tank 1. The chiller unit 2 can be an existing unit, generally equipped with an evaporator. The main water tank is responsible for the main circulation output and return of chilled water. A section of the main return pipe 12 enters the chiller unit 2 for heat exchange, which is a conventional heat exchange method. A working pipe network connects the main output pipe 11 and the main return pipe 12; this working pipe network is used for cooling the target area.

[0021] In this embodiment, the main water tank 1 is designed to facilitate water volume regulation and control cooling capacity. As a transfer station, the main water tank 1 can hold more water and supply more water to the pipeline, thus improving its adjustability. The main water tank 1 adopts the existing temperature-resistant outlet tank structure.

[0022] More importantly, the chilled water system also includes a first auxiliary water tank 31 for cooling the main water tank 1 and a second auxiliary water tank 32 for heating the main water tank 1. These two auxiliary water tanks further enhance the adjustability. The first auxiliary water tank 31 is suitable for use during cooling, while the second auxiliary water tank 32 is suitable for use during heating. The adjustability of multiple water tanks is thus greatly improved.

[0023] Furthermore, during operation, the water temperature of the first auxiliary water tank 31 is less than or equal to the water temperature of the main water tank 1, and the water temperature of the second auxiliary water tank 32 is higher than the water temperature of the main water tank 1. The water temperature of the first auxiliary water tank 31 should be slightly lower, so that the output of water from the main water tank 1 together with the water from the main water tank 1 is more controllable for cooling. The water temperature of the second auxiliary water tank 32 is higher, which is beneficial for the second auxiliary water tank 32 to output a portion of water to cooperate with the water from the main water tank when heating up.

[0024] Preferably, a main variable frequency output water pump 110 is connected to the main output pipe 11. The main variable frequency output water pump 110 can be an existing variable frequency circulating water pump, used to control the flow of chilled water. A first auxiliary output pipe 311 connects the first auxiliary water tank 31 to the section of the main output pipe 11 that enters the main variable frequency output water pump 110. The first auxiliary output pipe 311 can be switched on and off and its flow rate controlled to match the water volume in the main water tank 1. A first auxiliary return pipe 312 connects the first auxiliary water tank 31 to the middle section of the main return pipe 12. The first auxiliary return pipe 312 also passes through the chiller unit 2 for heat exchange, and a portion of the water flows back to the first auxiliary water tank 31. This output and return flow rate can be controlled by a solenoid valve. The chiller unit 2 contains an evaporator, which is a conventional chiller unit. Of course, the evaporator is connected to a compressor and condenser to operate normally; these are conventional technologies and will not be elaborated further here.

[0025] Furthermore, a second auxiliary output pipe 321 is connected between the second auxiliary water tank 32 and the section of the main output pipe 11 that enters the main variable frequency output water pump 110. A second auxiliary return pipe 322 is connected between the second auxiliary water tank 32 and the middle section of the main return pipe 12. This design is similar to the first auxiliary water tank 31, except that the temperature is different. Moreover, the second auxiliary return pipe 322 does not need to enter the chiller unit 2 because its temperature is higher and it does not need to be cooled by heat exchange.

[0026] Preferably, the working pipeline network includes a water distributor 41 connected to the outlet of the main output pipe 11, a water collector 42 connected to the inlet of the main return pipe 12, and several working branch pipes 43 connected between the water distributor 41 and the water collector 42. This is also a conventional design for some working pipelines. The working branch pipes 43 are usually connected to terminal equipment, such as fan coil units or air conditioning units, to directly exchange heat with the target indoor space. These are all conventional methods and will not be elaborated further.

[0027] Preferably, the first auxiliary water tank 31 is connected to a self-circulating cooling pipe 310 with both its inlet and outlet connected to it. The self-circulating cooling pipe 310 also passes through the refrigeration unit 2 for heat exchange. A circulation pump 3100 is also connected to the pipe of the self-circulating cooling pipe 310. This design is to cool the water in the first auxiliary water tank 31 in advance when a large amount of subsequent cooling is required. During this process, the valves of the output and return pipelines of the first auxiliary water tank 31 must be closed.

[0028] Furthermore, the main water tank 1, the first auxiliary water tank 31, and the second auxiliary water tank 32 are all connected to an injection pipe 51 and a drain pipe 52. These pipes are used for injecting and draining water, regulating the total water volume, and draining water for maintenance in case of pipe problems.

[0029] Preferably, the volumes of the first auxiliary water tank 31 and the second auxiliary water tank 32 are both half the volume of the main water tank 1. The auxiliary water tanks do not need to have a large capacity, which will make them more controllable.

[0030] During operation, the water levels in the main water tank 1, the first auxiliary water tank 31, and the second auxiliary water tank 32 are all below 30% of their respective volumes. This optimized design ensures that the internal pressure of the water tanks is not too high, resulting in better operational safety and stability. Of course, water is returned when not in operation, but the total volume is designed to prevent it from being completely filled.

[0031] Furthermore, the main return pipe 12 is located at a high position, while the main water tank 1, the first auxiliary water tank 31, and the second auxiliary water tank 32 are located at a low position. This makes the pipeline design more reasonable, the water pressure design more reasonable, and the water tank side as the pressure-bearing side, making the entire system more stable.

[0032] The entire system also includes solenoid valves and air vents installed on the corresponding pipelines. Air vents can be installed on high-level pipelines such as the main return pipe 12. Ideally, one solenoid valve should be installed on each pipeline to effectively control the opening and closing of each pipeline and the actual flow rate. Temperature and pressure sensors are also installed and connected to the pipelines to monitor the internal conditions of the water pipes. A central controller is needed, which can utilize existing automatic control equipment to electrically connect all valves, sensors, pumps, chiller units, etc., for unified control and management.

[0033] For example, when the system initially operates at a target temperature, only the main water tank 1 is active, handling both water supply and return. When cooling is needed, the pump frequency is increased, and the valves on the first auxiliary output pipe 311 and the first auxiliary return pipe 312 of the first auxiliary water tank 31 are opened to participate in the cooling process, increasing the cooling capacity while the main water tank maintains its original operating state, thus improving system stability. For heating, assistance can be provided through the second auxiliary water tank. This increases water distribution, improves pressure resistance, enhances controllability, and allows for more timely response to target temperatures, making it particularly suitable for environments with high temperature requirements, such as pharmaceutical manufacturing. Furthermore, multiple water tanks can be controlled according to different algorithms to meet varying needs for water supply and temperature regulation. The power consumption of the evaporator can also be controlled. This enhanced controllability makes the multi-tank structure of the system even more suitable, reducing the difficulties of controlling a tankless system and mitigating the limitations of a single-tank system. It also offers greater flexibility, allowing for temporary replacement in case of problems.

[0034] This design greatly improves the system's adjustable and controllable performance.

[0035] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An adjustable chilled water system, characterized in that, It includes a chiller unit (2), a main water tank (1), and a main output pipe (11) and a main return pipe (12) connected to the main water tank (1). One section of the main return pipe (12) enters the chiller unit (2) for heat exchange. A working pipe network is connected between the main output pipe (11) and the main return pipe (12). It also includes a first auxiliary water tank (31) for assisting the cooling of the main water tank (1) and a second auxiliary water tank (32) for assisting the heating of the main water tank (1).

2. The adjustable chilled water system according to claim 1, characterized in that, During operation, the water temperature of the first auxiliary water tank (31) is less than or equal to the water temperature of the main water tank (1), and the water temperature of the second auxiliary water tank (32) is higher than the water temperature of the main water tank (1).

3. The adjustable chilled water system according to claim 1, characterized in that, A main variable frequency output water pump (110) is connected to the main output pipe (11). A first auxiliary output pipe (311) is connected between the first auxiliary water tank (31) and the section of the main output pipe (11) that enters the main variable frequency output water pump (110). A first auxiliary return pipe (312) is connected between the first auxiliary water tank (31) and the middle section of the main return pipe (12). The first auxiliary return pipe (312) also passes through the refrigeration unit (2) for heat exchange. The refrigeration unit (2) has an evaporator.

4. An adjustable chilled water system according to claim 3, characterized in that, The second auxiliary water tank (32) is connected to the section of the main output pipe (11) that enters the main variable frequency output water pump (110) by a second auxiliary output pipe (321), and the second auxiliary water tank (32) is connected to the middle section of the main return pipe (12) by a second auxiliary return pipe (322).

5. An adjustable chilled water system according to claim 1, characterized in that, The working pipeline network includes a water distributor (41) connected to the outlet of the main output pipe (11), a water collector (42) connected to the inlet of the main return pipe (12), and several working branch pipes (43) connecting the water distributor (41) and the water collector (42).

6. An adjustable chilled water system according to claim 3, characterized in that, The first auxiliary water tank (31) is connected to a self-circulating cooling pipe (310) with both its inlet and outlet connected to it. The self-circulating cooling pipe (310) also passes through the refrigeration unit (2) for heat exchange. A circulating pump (3100) is also connected to the pipeline of the self-circulating cooling pipe (310).

7. An adjustable chilled water system according to claim 1, characterized in that, The main water tank (1), the first auxiliary water tank (31), and the second auxiliary water tank (32) are all connected to an injection pipe (51) and a drain pipe (52).

8. An adjustable chilled water system according to claim 7, characterized in that, The volume of the first auxiliary water tank (31) and the second auxiliary water tank (32) is half the volume of the main water tank (1).

9. An adjustable chilled water system according to claim 8, characterized in that, During operation, the water volume in the main water tank (1), the first auxiliary water tank (31), and the second auxiliary water tank (32) is all less than 30% of their respective volumes.

10. An adjustable chilled water system according to claim 1, characterized in that, The main return pipe (12) is in a high position, and the main water tank (1), the first auxiliary water tank (31) and the second auxiliary water tank (32) are in a low position. It also includes solenoid valves and air vents installed on the corresponding pipelines.

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