Medium and low temperature cold water system

Abstract

The utility model relates to a medium and low temperature cold water system which comprises a water chilling unit, a water tank and at least two sets of medium circulation pipelines, the at least two sets of medium circulation pipelines are used for providing medium and low temperature media in the range of 0-40 DEG C for different devices respectively, and a cold water circulation pipeline is arranged between the water chilling unit and the water tank. The cold water circulation pipeline is used for conveying water in the water tank to the water chilling unit and returning cold water produced by the water chilling unit to the water tank to form circulation, the medium circulation pipeline comprises a medium-going pipeline and a medium-returning pipeline, the medium-going pipeline and the medium-returning pipeline are both connected with the water tank, and the medium-going pipeline is provided with a three-way confluence valve; the three-way flow collecting valve is communicated with the media return pipeline through a flow collecting pipe, a bypass pipeline is further arranged between the media return pipeline and the media return pipeline, and cold water coming from the water tank is mixed with hot water generated by equipment by adjusting the opening degree of the three-way flow collecting valve, so that the preset temperature provided for the equipment by the corresponding media circulation pipeline is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling, in particular to a medium and low temperature cold water system. Background Art

[0002] At present, when the cold water systems on the market supply at least two devices with different medium and low temperature requirements simultaneously, usually a set of heating pipes is configured for each temperature control device. Since the heating pipes output heating capacity at the cost of consuming electric energy, if high-power heating pipes are used, the electric energy consumption will also be large, and the daily operation cost is relatively high. Content of the Utility Model

[0003] In view of the deficiencies of the existing technology at present, the utility model provides a medium and low temperature cold water system with energy saving and cost reduction.

[0004] To achieve the above object, the utility model provides a medium and low temperature cold water system, which has the following technical solutions: the cold water system includes a cold water unit, a water tank, and at least two groups of media circulation pipelines. The at least two groups of media circulation pipelines are used to provide medium and low temperature media in the range of 0 to 40 °C to different devices respectively. A cold water circulation pipeline is arranged between the cold water unit and the water tank. The cold water circulation pipeline is used to transport the water in the water tank to the cold water unit and return the cold water made by the cold water unit to the water tank to form a cycle. The media circulation pipeline includes a media supply pipeline and a media return pipeline. Both the media supply pipeline and the media return pipeline are connected to the water tank. A three-way confluence valve is arranged on the media supply pipeline. The three-way confluence valve is connected to the media return pipeline through a confluence pipe. A bypass pipeline is also arranged between the media supply pipeline and the media return pipeline. By adjusting the opening degree of the three-way confluence valve, the cold water coming from the water tank is mixed with the hot water generated by the device, so as to reach the preset temperature provided by the corresponding media circulation pipeline to the device.

[0005] Preferably, a media pump, a temperature sensor, a pressure gauge, and a flow switch are arranged on the media supply pipeline. The temperature sensor is associated with the three-way confluence valve.

[0006] Preferably, the cold water circulation pipeline includes a cold water supply pipeline and a cold water return pipeline. A cold water circulation pump is arranged on the cold water supply pipeline.

[0007] Preferably, at least one ball valve is arranged on each of the cold water supply pipeline, the cold water return pipeline, the media supply pipeline, and the media return pipeline.

[0008] Preferably, the water tank is provided with a water outlet pipeline and a water inlet pipeline. The water outlet pipeline is connected to each media supply pipeline, and the water inlet pipeline is connected to each media return pipeline.

[0009] Preferably, a filter is provided in the media return pipeline.

[0010] In the medium and low temperature cold water system of the present utility model, through a three-way confluence valve, the hot water generated by the equipment is mixed with the low temperature water in the water tank, and the water temperature is controlled within the required medium and low temperature range of 0 to 40°C. Higher temperature control accuracy can be achieved through the linear stepless output of the three-way confluence valve; no heating tube is required, which is more power-saving and the problem of heating tube damage will not occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the embodiments.

[0012] Figure 1 It is a schematic diagram of the overall structural flow of the medium and low temperature cold water system of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] In order to be able to more clearly describe the technical content of the present utility model, the following further describes it in combination with specific embodiments.

[0014] As Figure 1 shown, it is a specific embodiment of the medium and low temperature cold water system of the present utility model. Among them, the cold water system includes a cold water unit 1, a water tank 2, and two groups of media circulation pipelines. The two groups of media circulation pipelines are used to provide medium and low temperature media in the range of 0 to 40°C to different devices respectively. A cold water circulation pipeline is provided between the cold water unit 1 and the water tank 2. The cold water circulation pipeline is used to transport the water in the water tank to the cold water unit and return the cold water made by the cold water unit to the water tank to form a cycle. The low temperature cold water provided by the cold water unit 1 to the water tank 2 is generally 0 to 10°C. Therefore, the water tank 2 generally stores low temperature (≤10°C) cold water. Specifically, the cold water circulation pipeline includes a cold water supply pipeline 4 and a cold water return pipeline 5, and a cold water circulation pump 3 is provided on the cold water supply pipeline 4. Through the cold water circulation pump 3, the water in the water tank 2 is transported to the cold water unit 1, and the cold water continuously returns to the water tank to form a cycle.

[0015] In this embodiment, two groups of media circulation pipelines are provided. The first group of media circulation pipelines includes a media supply pipeline 9 and a media return pipeline 15, and the second group of media circulation pipelines includes a media supply pipeline 10 and a media return pipeline 16. The media supply pipelines 9, 10 and the media return pipelines 15, 16 are all connected to the water tank 2. Specifically, the water tank 2 is provided with a water outlet pipeline 7 and a water inlet pipeline 8. The water outlet pipeline 7 is connected to the media supply pipelines 9, 10, and the water inlet pipeline 8 is connected to the media return pipelines 15, 16.

[0016] In the first group of media circulation pipelines, a three-way confluence valve 11 is provided on the media supply pipeline 9. The three-way confluence valve 11 is connected to the media return pipeline 15 through a confluence pipe 13. A bypass pipeline 17 is also provided between the media supply pipeline 9 and the media return pipeline 15. By adjusting the opening degree of the three-way confluence valve 11, the cold water coming from the water tank 2 is mixed with the hot water generated by the equipment to reach the preset temperature provided by the corresponding media circulation pipeline to the equipment. A media pump 20, a temperature sensor 22, a pressure gauge, and a flow switch are also provided on the media supply pipeline 9. The temperature sensor 22 is associated with the three-way confluence valve 11. A filter 19 is provided on the media return pipeline 15 for filtering impurities. The media pump 20 is used to transport the media water in the media supply pipeline 9 to the corresponding production equipment and then return it to the water tank through the media return pipeline from the production equipment.

[0017] In the second group of media circulation pipelines, a three-way confluence valve 12 is provided on the media supply pipeline 10. The three-way confluence valve 12 is connected to the media return pipeline 16 through a confluence pipe 14. A bypass pipeline 18 is also provided between the media supply pipeline 10 and the media return pipeline 16. By adjusting the opening degree of the three-way confluence valve 12, the cold water coming from the water tank 2 is mixed with the hot water generated by the equipment to reach the preset temperature provided by the corresponding media circulation pipeline to the equipment. A media pump 21, a temperature sensor 23, a pressure gauge, and a flow switch are also provided on the media supply pipeline 10. The temperature sensor 23 is associated with the three-way confluence valve 12. A filter is also provided on the media return pipeline 16 for filtering impurities.

[0018] Thus, through the three-way confluence valve, the hot water generated in the equipment production in the media return pipeline is mixed with the low-temperature water in the water tank. By adjusting the opening degree of the three-way confluence valve, the water temperature can be controlled within a small range to meet the medium and low-temperature requirements of different equipment. The temperature sensor can detect the temperature of the media water at the outlet of the media pump and adjust the opening degree of the three-way confluence valve according to the difference between the actual temperature and the set temperature, and finally reach the set medium and low-temperature (≤40 °C). A bypass adjustment valve can be provided on the bypass pipeline, and by adjusting the opening degree of the bypass adjustment valve, the flow rate and pressure at the outlet of the media pump can be adjusted.

[0019] The set temperatures of the two groups of media circulation pipelines can be the same or different according to the production process requirements. According to the cold storage capacity of the selected chiller + water tank, the media circulation pipelines configured at the back end are not limited to only corresponding to 2 sets of production equipment, and multiple sets of equipment can be added.

[0020] At least one ball valve is provided on the described cold water supply pipeline 4, cold water return pipeline 5, the described medium supply pipelines 9, 10 and medium return pipelines 15, 16 to control the on and off of the pipelines. A flow switch 6 can be provided in each pipeline to detect whether there is liquid flow in the pipeline. If no water flow is detected, an alarm signal is provided.

[0021] A temperature sensor can be provided in the water tank 2 to detect the temperature in the water tank. When the detected temperature < set temperature, it indicates that the refrigeration unit stops working; when the detected temperature > set temperature, it indicates that the refrigeration unit starts working.

[0022] In the medium and low temperature cold water system of the present utility model, through a three-way confluence valve, the hot water generated by the equipment is mixed with the low temperature water in the water tank to control the water temperature within the required medium and low temperature range of 0 to 40 °C. Through the linear stepless output of the three-way confluence valve, higher temperature control accuracy can be achieved; there is no need for a heating pipe, which is more power-saving and there will be no problem of heating pipe damage.

[0023] In this specification, the present utility model has been described with reference to its specific embodiments. However, it is obvious that various modifications and transformations can still be made without departing from the spirit and scope of the present utility model. Therefore, the specification and drawings should be regarded as illustrative rather than restrictive.

Claims

1. A medium and low temperature cold water system, characterized in that: The cold water system includes a chiller, a water tank, and at least two groups of media circulation pipelines. The at least two groups of media circulation pipelines are used to provide medium and low temperature media in the range of 0 to 40°C to different equipment respectively. A cold water circulation pipeline is set between the chiller and the water tank. The cold water circulation pipeline is used to transport the water in the water tank to the chiller and return the cold water produced by the chiller to the water tank to form a cycle. The media circulation pipeline includes a media outgoing pipeline and a media return pipeline. The media outgoing pipeline and the media return pipeline are both connected to the water tank. The media outgoing pipeline is provided with a three-way combining valve. The three-way combining valve is connected to the media return pipeline through a combining pipe. A bypass pipeline is also set between the media outgoing pipeline and the media return pipeline. By adjusting the opening size of the three-way combining valve, the cold water from the water tank and the hot water generated by the equipment are mixed to reach the preset temperature provided to the equipment by the corresponding media circulation pipeline.

2. The medium and low temperature cold water system according to claim 1, characterized in that: The media outlet pipeline is provided with a media pump, a temperature sensor, a pressure gauge, and a flow switch, and the temperature sensor is associated with the three-way converging valve.

3. The medium and low temperature cold water system according to claim 1, characterized in that: The cold water circulation pipeline comprises a cold water outgoing pipeline and a cold water return pipeline, and a cold water circulation pump is arranged on the cold water outgoing pipeline.

4. The medium and low temperature cold water system according to claim 3, characterized in that: At least one ball valve is arranged on the cold water outgoing pipeline, the cold water return pipeline, the media outgoing pipeline and the media return pipeline.

5. The medium and low temperature cold water system according to claim 1, characterized in that: The water tank is provided with a water outlet pipeline and a water inlet pipeline, the water outlet pipeline is connected with each medium outgoing pipeline, and the water inlet pipeline is connected with each medium return pipeline.

6. The medium and low temperature cold water system according to claim 1, characterized in that: The media return pipeline is provided with a filter.

Images