Cooling waterway system of water chiller

Abstract

The utility model relates to the technical field of ice water machines, in particular to a cooling water path system of an ice water machine. The cooling system comprises an ice water machine and a cooling tower, the water outlet end of the ice water machine is communicated with the cooling tower through a water feeding pipeline, the water outlet end of the cooling tower is communicated with a water return pipeline, the tail end of the water return pipeline is connected into a mixing box, the water outlet end of the mixing box is communicated with the ice water machine through a return pipe, and a water pump is installed on the water feeding pipeline. A bypass pipeline is bridged between the water outlet end of the water pump and the mixing box, and a first valve is mounted on the bypass pipeline. On the premise that the use cost of the water chiller is not increased, the problem that the water chiller is shut down due to the fact that the temperature of backflow cooling water is too low can be solved.

Description

Technical Field

[0001] This utility model relates to the field of chiller technology, specifically a chiller cooling water circuit system. Background Technology

[0002] A chilled water machine is another name for a water chiller. Simply put, a chilled water machine is a machine that outputs low-temperature chilled water, and the output chilled water temperature can be adjusted between 3 and 35 degrees Celsius.

[0003] In existing technologies, to achieve heat dissipation in chillers, the chiller's cooling water is connected to a cooling tower. This structure is described in Chinese Patent Publication No. CN212109719U, entitled "A Cooling Tower Auxiliary Cooling System." Since the cooling effect of a cooling tower is closely related to the external environment, especially in low-temperature environments during winter, the cooling tower's cooling effect on the cooling water is optimal. However, in practical implementation, when the temperature of the cooling water returning from the cooling tower to the chiller is too low, the chiller may fail to start due to insufficient pressure differential. To solve this problem, existing technologies mostly employ methods such as shutting off the cooling water supply pipeline to the cooling tower in winter or adding a heater to the pipeline returning from the cooling tower to the chiller. While both methods solve the chiller shutdown problem, shutting off the cooling water supply pipeline to the cooling tower increases the chiller's cooling energy consumption due to the lack of cooling tower heat dissipation, leading to increased operating costs. Adding a heater adds an extra heat source, also increasing costs. Therefore, a solution is urgently needed. Utility Model Content

[0004] In order to avoid and overcome the technical problems existing in the prior art, this utility model provides a chiller cooling water circuit system that can prevent the chiller from shutting down due to the low temperature of the return cooling water without increasing the operating cost of the chiller.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A chiller cooling water system includes a chiller and a cooling tower. The outlet of the chiller is connected to the cooling tower via a water supply pipe. The outlet of the cooling tower is connected to a return water pipe. The end of the return water pipe is connected to a mixing tank. The outlet of the mixing tank is connected to the chiller via a return pipe. A water pump is installed on the water supply pipe. A bypass pipe is connected between the outlet of the water pump and the mixing tank. A first valve is installed on the bypass pipe.

[0007] As a further embodiment of this utility model: the inner cavity of the mixing box is fixed with a mixing cover, which is a hollow, non-closed annular structure. The opening of the non-closed annular structure forms a first water outlet and a second water outlet arranged adjacent to each other, and the water outlet paths of the first water outlet and the second water outlet point to each other respectively; the water outlet of the return water pipe and the water outlet of the bypass pipe are both connected to the inner cavity of the mixing cover.

[0008] As a further embodiment of this utility model: a water inlet main pipe is installed at the bottom of the mixing tank. The bottom end of the water inlet main pipe is sealed, and the top end is inserted into the inner cavity of the mixing hood. The outlet end of the bypass pipe and the outlet end of the return pipe are distributed on both sides of the bottom of the water inlet main pipe.

[0009] As a further improvement of this utility model: the inner cavity of the mixing hood is fixed with two baffles, which are arranged in a figure-eight shape and distributed directly above the top of the main water inlet pipe, forming a turbulent mixing zone between the two baffles.

[0010] As a further improvement of this utility model: the mixing hood is arranged at the bottom inside the mixing tank, and the water inlet end of the return pipe is arranged at the top of the mixing hood.

[0011] As a further improvement of this utility model, a second valve is installed on the water supply pipeline between the bypass pipeline and the cooling tower.

[0012] As a further improvement of this utility model, the first valve is a regulating valve.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. By installing a bypass pipeline, a portion of the high-temperature cooling water discharged from the chiller's outlet is mixed with the cooling water cooled by the cooling tower. This eliminates the need for heating devices on the return or return water pipes to heat the cooled water, thus avoiding additional operating costs. Furthermore, the high-temperature cooling water and the cooled water then flow back into the chiller, achieving cooling of the chiller's internal water while preventing over-cooling that could cause chiller startup malfunctions, again without increasing the chiller's refrigeration costs.

[0015] 2. A mixing hood is installed inside the mixing tank. The cooling water discharged from the return water pipe and the bypass pipe converges and mixes in the mixing hood. After that, it is discharged from the first outlet and the second outlet of the mixing hood. Since the water outlet paths of the first outlet and the second outlet point to each other, the cooling water discharged from the first outlet and the second outlet will mix again, which further improves the mixing effect of the cooling water.

[0016] 3. The arrangement of the main inlet pipe allows the coolant discharged from the bypass pipe and return pipe to be mixed in the main inlet pipe before entering the mixing chamber, further improving the mixing effect of the coolant.

[0017] 4. The mixing chamber is equipped with two baffles. The two baffles are arranged in a figure-eight shape and are located directly above the top of the main water inlet pipe. A turbulent mixing zone is formed between the two baffles. The coolant discharged into the mixing chamber from the main water inlet pipe is further turbulently mixed in the turbulent mixing zone before being discharged to the first and second water outlets, which further improves the mixing effect of the coolant. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the internal structure of the mixing box in this utility model.

[0020] Figure 3 This is a schematic diagram of the internal structure of the mixing cover in this utility model.

[0021] Figure 4 This is a top view of the mixing cover in this utility model.

[0022] In the diagram: 10, chiller; 20, cooling tower; 30, water supply pipe; 31, water pump; 32, second valve; 40, return water pipe; 50, mixing tank; 51, mixing hood; 511, first outlet; 512, second outlet; 52, baffle; 53, main inlet pipe; 60, bypass pipe; 61, first valve; 70, return pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] For ease of understanding, the specific structure and working method of this utility model are further described below with reference to the accompanying drawings:

[0025] The specific structure of this utility model is as follows: Figure 1-4As shown, its main structure includes a chiller 10 and a cooling tower 20. The outlet of the chiller 10 is connected to the cooling tower 20 via a water supply pipe 30. The outlet of the cooling tower 20 is connected to a return water pipe 40, the end of which is connected to a mixing tank 50. The outlet of the mixing tank 50 is connected to the chiller 10 via a return pipe 70, thus achieving the circulation of cooling water between the chiller 10 and the cooling tower 20. A water pump 31 is installed sequentially on the water supply pipe 30. A bypass pipe 60 bridges the outlet of the water pump 31 and the mixing tank 50, and a first valve 61 is installed on the bypass pipe 60. When the temperature is low in winter, by opening the first valve 61 on the bypass pipe 60, a portion of the cooling water in the water supply pipe 30 bypasses the cooling tower 20 and enters the mixing tank 50 through the bypass pipe 60. There, it mixes with the cooling water cooled by the cooling tower 20 and finally flows back to the chiller 10 through the return pipe 70, effectively raising the temperature of the cooling water returning to the chiller 10. In this invention, by mixing a portion of the high-temperature cooling water discharged from the outlet of the chiller 10 with the cooling water cooled by the cooling tower 20 before returning it to the chiller 10, not only is there no need to install heating devices on the return pipe 70 or the return water pipe 40, but it also achieves cooling of the cooling water in the chiller 10. Simultaneously, it prevents excessive cooling of the cooling water from causing chiller 10 startup failure and does not increase additional operating costs.

[0026] Based on the above, to ensure the uniformity of mixing of the cooling water discharged from the return water pipe 40 and the bypass pipe 60, the structure inside the mixing tank 50 is further optimized. Specifically, such as... Figure 2 As shown, a mixing cover 51 is fixed inside the mixing chamber 50, as... Figure 3 and Figure 4 As shown, the mixing shroud 51 has a hollow, non-closed annular structure. The opening of this non-closed annular structure forms a first outlet 511 and a second outlet 512 arranged adjacent to each other, with the water outlet paths of the first outlet 511 and the second outlet 512 pointing towards each other. The outlet ends of the return water pipe 40 and the bypass pipe 60 are both connected to the inner cavity of the mixing shroud 51. In actual implementation, it is preferable that the outlet ends of the return water pipe 40 and the bypass pipe 60 are arranged adjacent to each other. The cooling water discharged from the return water pipe 40 and the bypass pipe 60 converges and mixes in the mixing shroud 51. Afterward, it is discharged from the first outlet 511 and the second outlet 512 of the mixing shroud 51. Since the water outlet paths of the first outlet 511 and the second outlet 512 point towards each other, the cooling water discharged from the first outlet 511 and the second outlet 512 will mix again, further improving the mixing effect of the cooling water.

[0027] Furthermore, such as Figure 2 and Figure 3As shown, a main water inlet pipe 53 is installed at the bottom of the mixing tank 50. The bottom of the main water inlet pipe 53 is sealed, and its top extends into the inner cavity of the mixing shroud 51. The outlet ends of the bypass pipe 60 and the return pipe 40 are located on both sides of the bottom of the main water inlet pipe 53. This arrangement of the main water inlet pipe 53 allows the coolant discharged from the bypass pipe 60 and the return pipe 40 to mix within the main water inlet pipe 53 before entering the mixing shroud 51, further improving the mixing effect of the coolant.

[0028] Based on the above, such as Figure 3 As shown, two baffles 52 are fixed inside the mixing shroud 51. The two baffles 52 are arranged in a V-shape and are located directly above the top of the main water inlet pipe 53, forming a turbulent mixing zone between them. The coolant discharged into the mixing shroud 51 from the main water inlet pipe 53 is further turbulently mixed in the turbulent mixing zone before being discharged to the first outlet 511 and the second outlet 512, which further improves the mixing effect of the coolant.

[0029] In addition, such as Figure 2 As shown, the mixing shroud 51 is arranged at the bottom inside the mixing tank 50, and the water inlet end of the return pipe 70 is arranged at the top of the mixing shroud 51, which increases the flow path of the coolant and also helps to further mix the coolant.

[0030] Based on the above, such as Figure 1 As shown, a second valve 32 is installed on the water supply pipe 30 between the bypass pipe 60 and the cooling tower 20. When there is no need for heat dissipation through the cooling tower 20, the second valve 32 can be closed to block the flow of coolant to the cooling tower 20.

[0031] In addition, the first valve 61 is a regulating valve used to regulate the flow rate of the bypass pipe 60, thereby regulating the temperature of the cooling water returning to the chiller 10.

[0032] Of course, those skilled in the art will recognize that this invention is not limited to the details of the exemplary embodiments described above, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0034] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.

Claims

1. An ice-water machine cooling water circuit system comprising an ice-water machine (10) and a cooling tower (20), characterized by, The water outlet end of the water chiller (10) is communicated with the cooling tower (20) through the water inlet pipeline (30), the water outlet end of the cooling tower (20) is communicated with the water return pipeline (40), the terminal end of the water return pipeline (40) is connected to the mixing box (50), the water outlet end of the mixing box (50) is communicated with the water chiller (10) through the return pipeline (70), the water pump (31) is installed on the water inlet pipeline (30), the bypass pipeline (60) is bridged between the water outlet end of the water pump (31) and the mixing box (50), and the first valve (61) is installed on the bypass pipeline (60).

2. The chilled water system of claim 1, wherein, The mixing cover (51) is fixed in the inner cavity of the mixing box (50), the mixing cover (51) is in the form of an open ring structure with an inner cavity, the opening of the open ring structure is formed with the first water outlet (511) and the second water outlet (512) arranged adjacent to each other, and the water outlet paths of the first water outlet (511) and the second water outlet (512) are respectively directed to each other; the water outlet end of the water return pipeline (40) and the water outlet end of the bypass pipeline (60) are both communicated with the inner cavity of the mixing cover (51).

3. The chilled water system of claim 2, wherein, The water inlet main pipe (53) is installed at the bottom of the mixing box (50), the bottom end of the water inlet main pipe (53) is sealed, the top end of the water inlet main pipe (53) is communicated with the inner cavity of the mixing cover (51), and the water outlet end of the bypass pipeline (60) and the water outlet end of the water return pipeline (40) are distributed on both sides of the bottom of the water inlet main pipe (53).

4. The chilled water system of claim 3, wherein, The two baffles (52) are fixed in the inner cavity of the mixing cover (51), the two baffles (52) are in the form of an eight-shaped structure and are distributed directly above the top end of the water inlet main pipe (53), and the turbulent mixing area is formed between the two baffles (52).

5. The chilled water system of any one of claims 2-4, wherein the chilled water system further comprises a bypass line in fluid communication with the first and second water lines. The mixing cover (51) is arranged at the inner bottom of the mixing box (50), and the water inlet end of the return pipeline (70) is arranged at the upper part of the mixing cover (51).

6. The chilled water system of any one of claims 1-4, wherein, The second valve (32) is installed on the pipeline between the bypass pipeline (60) and the cooling tower (20) of the water inlet pipeline (30).

7. The chilled water system of any one of claims 1-4, wherein the chilled water system further comprises a bypass line in fluid communication with the first and second water lines. The first valve (61) is an adjusting valve.

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