CN220507787U - Heat exchange device of low-temperature chilled water unit - Google Patents
Heat exchange device of low-temperature chilled water unit Download PDFInfo
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- CN220507787U CN220507787U CN202321895896.5U CN202321895896U CN220507787U CN 220507787 U CN220507787 U CN 220507787U CN 202321895896 U CN202321895896 U CN 202321895896U CN 220507787 U CN220507787 U CN 220507787U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 170
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000003756 stirring Methods 0.000 claims description 51
- 239000008399 tap water Substances 0.000 claims description 10
- 235000020679 tap water Nutrition 0.000 claims description 10
- 238000007710 freezing Methods 0.000 claims description 8
- 230000008014 freezing Effects 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The utility model relates to a heat exchange device of a low-temperature chilled water unit, which comprises a chilled water tank, wherein the chilled water tank is connected with a plate heat exchanger through a chilled water inlet pipe, and the plate heat exchanger is connected with the chilled water tank through a chilled water return pipe; the plate heat exchanger also forms a circulating structure with a normal-temperature water return pipe, a normal-temperature water tank and a normal-temperature water inlet pipe, a stirrer and a temperature sensor for detecting the water temperature in the normal-temperature water tank are arranged in the normal-temperature water tank, a flow controller is arranged on the normal-temperature water inlet pipe, and the temperature sensor and the flow controller are connected with the PLC. The low-temperature chilled water unit heat exchange device can enable the temperature of the low-temperature water subjected to heat exchange and temperature reduction to be adjustable by adjusting the flow of the low-temperature water entering the plate heat exchanger, and meets the requirements of process water with different temperatures.
Description
Technical Field
The utility model belongs to the technical field of chilled water treatment, and particularly relates to a heat exchange device of a low-temperature chilled water unit.
Background
In industrial production, cooling water is generally required to exchange heat and cool the technological process, and for the technological process with low temperature requirement, the refrigerating water prepared by a refrigerator and a corresponding pipeline system can be adopted to meet the requirement, but the refrigerator generally generates the refrigerating water with the temperature of minus 20 ℃ to minus 30 ℃, and the refrigerating water can not be directly used for certain special processes with high temperature requirement, and cooling water with the temperature higher than normal temperature water is required to be used, and then the refrigerating water prepared by the refrigerator is required to exchange heat to obtain cooling water or the refrigerating water is heated to obtain cooling water.
However, the cooling water obtained by heat exchange of the chilled water prepared by the refrigerator has single temperature, and cannot meet the requirements of various processes; the chilled water is heated by the heater, so that the temperature of the chilled water is increased and then the chilled water is sent to a workshop for use, but the heater needs more electric energy, and the cost is higher.
Disclosure of Invention
The utility model aims to provide a heat exchange device of a low-temperature chilled water unit, which can provide cooling water with different temperatures and meet the requirements of different process water.
The utility model solves the problems by adopting the following technical scheme: the heat exchange device of the low-temperature chilled water unit comprises a chilled water tank, wherein the chilled water tank is connected with a plate heat exchanger through a chilled water inlet pipe, and the plate heat exchanger is connected with the chilled water tank through a chilled water return pipe; the plate heat exchanger is characterized in that the plate heat exchanger is also in a circulating structure with a normal-temperature water return pipe, a normal-temperature water tank and a normal-temperature water inlet pipe, a stirrer and a temperature sensor for detecting the temperature of water in the normal-temperature water tank are arranged in the normal-temperature water tank, a flow controller is arranged on the normal-temperature water inlet pipe, and the temperature sensor and the flow controller are both connected with a PLC.
Preferably, the freezing water tank is also connected with a freezer.
Preferably, the normal temperature water tank is also connected with tap water through a tap water pipe.
Preferably, the normal temperature water tank is also connected with a process water unit through a water outlet pipe.
Preferably, the inlet and the outlet of the freezing water tank and the normal temperature water tank are respectively provided with a control valve for controlling the pipeline switch.
Preferably, the stirrer comprises a stirring shaft and a stirring paddle arranged on the stirring shaft, and a motor is arranged at one end, far away from the stirring paddle, of the stirring shaft.
More preferably, the stirring paddles comprise a first stirring paddle, a second stirring paddle and a third stirring paddle which are identical in structure, the first stirring paddle, the second stirring paddle and the third stirring paddle are sequentially arranged on the stirring shaft from top to bottom, and three paddles or two paddles are arranged on the first stirring paddle, the second stirring paddle and the third stirring paddle.
Preferably, the temperature sensor is an infrared temperature sensor, a thermocouple temperature sensor or a thermistor temperature sensor.
Compared with the prior art, the utility model has the advantages that:
according to the heat exchange device of the medium-low temperature chilled water unit, chilled water in the chilled water tank and normal-temperature water in the normal-temperature water tank exchange heat through the plate heat exchanger, the warmed chilled water returns to the chilled water tank again, the cooled normal-temperature water returns to the normal-temperature water tank again, a temperature sensor for detecting the water temperature in the normal-temperature water tank is arranged in the normal-temperature water tank, a flow controller is arranged on a normal-temperature water inlet pipe, the temperature sensor and the flow controller are both connected with the PLC, and the temperature of the normal-temperature water cooled by heat exchange can be adjusted by adjusting the flow of the normal-temperature water entering the plate heat exchanger so as to meet the requirements of process water with different temperatures; in addition, the stirrer is arranged in the normal-temperature water tank, so that the water temperature in the normal-temperature water tank is uniformly distributed, and the accuracy of the test temperature is greatly improved.
Drawings
Fig. 1 is a schematic structural diagram of a heat exchange device of a low-temperature chilled water unit in an embodiment of the utility model.
Wherein: 1 is a freezing water tank, 2 is a freezing water inlet pipe, 3 is a plate heat exchanger, 4 is a freezing water return pipe, 5 is a normal temperature water return pipe, 6 is a normal temperature water tank, 7 is a normal temperature water inlet pipe, 8 is a stirrer, 8.1 is a stirring shaft, 8.2 is a stirring paddle, 9 is a flow controller, 10 is a refrigerator, 11 is a tap water pipe, 12 is a water outlet pipe, and 13 is a process water unit.
Description of the embodiments
The utility model is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1, the heat exchange device of the low-temperature chilled water unit in this embodiment is schematically shown in structure.
The low-temperature chilled water unit heat exchange device comprises a chilled water tank 1, wherein the chilled water tank 1 is connected with a refrigerator 10, the chilled water tank 1 is also connected with a plate heat exchanger 3 through a chilled water inlet pipe 2, and the plate heat exchanger 3 is connected with the chilled water tank 1 through a chilled water return pipe 4; the plate heat exchanger 3 also forms a circulating structure with a normal temperature water return pipe 5, a normal temperature water tank 6 and a normal temperature water inlet pipe 7, a stirrer 8 and a temperature sensor for detecting the water temperature in the normal temperature water tank are arranged in the normal temperature water tank 6, and the temperature sensor is a thermocouple temperature sensor. The normal temperature water inlet pipe 7 is provided with a flow controller 9, the temperature sensor and the flow controller 9 are connected with a PLC controller, and the inlet and the outlet of the freezing water tank 1 and the normal temperature water tank 6 are respectively provided with a control valve for controlling the pipeline switch.
The normal temperature water tank 6 is also connected with tap water through a tap water pipe 11, when the water level in the normal temperature water tank 6 is lower than the minimum, the control valve is opened, tap water enters the normal temperature water tank 6 through the tap water pipe 11, and when the water level reaches the maximum, the control valve is closed.
The normal temperature water tank 6 is also connected with a process water unit 13 through a water outlet pipe 12, and the normal temperature water after heat exchange and temperature reduction of the plate heat exchanger 3 is returned to the normal temperature water tank 6 and then is sent into the process water unit through the water outlet pipe 12.
The stirrer 8 comprises a stirring shaft 8.1 and a stirring paddle 8.2 arranged on the stirring shaft 8.1, wherein a motor is arranged at one end, far away from the stirring paddle 8.2, of the stirring shaft 8.1, the stirring paddle 8.2 comprises a first stirring paddle, a second stirring paddle and a third stirring paddle which are identical in structure, the first stirring paddle, the second stirring paddle and the third stirring paddle are sequentially arranged on the stirring shaft 8.1 from top to bottom respectively, and three paddles are respectively arranged on the first stirring paddle, the second stirring paddle and the third stirring paddle.
The working process of the present embodiment is described in detail below with reference to the accompanying drawings:
the chilled water generated in the cold machine 10 enters the chilled water tank 1, chilled water (for example, 25 ℃) in the chilled water tank 1 enters the plate heat exchanger 3 through the chilled water inlet pipe 2, normal temperature water (for example, 25 ℃) in the normal temperature water tank 6 enters the plate heat exchanger 3 through the normal temperature water inlet pipe 7, the chilled water exchanges heat with the normal temperature water, the chilled water absorbs the heat of the normal temperature water to raise the temperature, the normal temperature water releases heat to cool the chilled water, the warmed chilled water returns to the chilled water tank 1 again through the chilled water return pipe 4, the chilled water can be recycled, and the cooled tap water returns to the normal temperature water tank 6 through the water outlet pipe 12 and then is sent to the process water unit 13.
In the heat exchange process, a temperature sensor in the normal temperature water tank 6 transmits a temperature signal to a PLC controller, the PLC controller receives the signal and then controls a flow controller 9 on the normal temperature water inlet pipe 7, the flow of the normal temperature water in the normal temperature water inlet pipe 7 is regulated, and then the water quantity of the normal temperature water entering the plate heat exchanger 3 is regulated until the normal temperature water temperature after heat exchange and temperature reduction meets a certain set value. In the heat exchange process, water in the normal-temperature water tank 6 is stirred by the stirring shaft 8, so that the temperature in the water tank is uniformly distributed, and the temperature tested by the temperature sensor is prevented from having errors.
Therefore, the temperature of the hot water after heat exchange and temperature reduction can be adjusted (for example, the temperature can be adjusted to 4-10 ℃) by arranging the flow controller 9 and the PLC on the temperature sensor in the normal-temperature water tank and the normal-temperature water inlet pipe 7, so that the requirements of different process waters are met.
In addition to the above embodiments, the present utility model also includes other embodiments, and all technical solutions that are formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of the present utility model.
Claims (8)
1. The utility model provides a low temperature chilled water unit heat transfer device which characterized in that: the refrigerating system comprises a refrigerating water tank (1), wherein the refrigerating water tank (1) is connected with a plate heat exchanger (3) through a refrigerating water inlet pipe (2), and the plate heat exchanger (3) is connected with the refrigerating water tank (1) through a refrigerating water return pipe (4); the plate heat exchanger (3) and normal temperature water return pipe (5), normal temperature water tank (6), normal temperature water inlet tube (7) form circulation structure, be equipped with agitator (8) in normal temperature water tank (6) and be used for detecting the temperature sensor of temperature in the normal temperature water tank, be equipped with flow controller (9) on normal temperature water inlet tube (7), temperature sensor and flow controller (9) all are connected with the PLC controller.
2. The low temperature chilled water unit heat transfer device of claim 1, wherein: the freezing water tank (1) is also connected with a refrigerator (10).
3. The low temperature chilled water unit heat transfer device of claim 1, wherein: the normal temperature water tank (6) is also connected with tap water through a tap water pipe (11).
4. The low temperature chilled water unit heat transfer device of claim 1, wherein: the normal temperature water tank (6) is also connected with a process water unit (13) through a water outlet pipe (12).
5. The low temperature chilled water unit heat transfer device of claim 1, wherein: and control valves for controlling pipeline opening and closing are arranged at the inlet and the outlet of the freezing water tank (1) and the normal temperature water tank (6).
6. The low temperature chilled water unit heat transfer device of claim 1, wherein: the stirrer (8) comprises a stirring shaft (8.1) and a stirring paddle (8.2) arranged on the stirring shaft (8.1), and a motor is arranged at one end, far away from the stirring paddle (8.2), of the stirring shaft (8.1).
7. The low temperature chilled water unit heat transfer device of claim 6, wherein: the stirring paddles (8.2) comprise a first stirring paddle, a second stirring paddle and a third stirring paddle which are identical in structure, the first stirring paddle, the second stirring paddle and the third stirring paddle are sequentially arranged on the stirring shaft (8.1) from top to bottom respectively, and three paddles or two paddles are arranged on the first stirring paddle, the second stirring paddle and the third stirring paddle.
8. The low temperature chilled water unit heat transfer device of claim 1, wherein: the temperature sensor is an infrared temperature sensor, a thermocouple temperature sensor or a thermistor temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321895896.5U CN220507787U (en) | 2023-07-19 | 2023-07-19 | Heat exchange device of low-temperature chilled water unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321895896.5U CN220507787U (en) | 2023-07-19 | 2023-07-19 | Heat exchange device of low-temperature chilled water unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220507787U true CN220507787U (en) | 2024-02-20 |
Family
ID=89882304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321895896.5U Active CN220507787U (en) | 2023-07-19 | 2023-07-19 | Heat exchange device of low-temperature chilled water unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220507787U (en) |
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2023
- 2023-07-19 CN CN202321895896.5U patent/CN220507787U/en active Active
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