Energy-saving cooling device

Abstract

The utility model discloses an energy-saving cooling device which comprises a common water tank, a heat preservation water tank, a cooling water circulation cooling pipeline, a front-section output pipeline and a rear-section return pipeline, and outlets of the common water tank and the heat preservation water tank are respectively connected with an input end of the cooling water circulation cooling pipeline. The output end of the cooling water circulation cooling pipeline is connected with an inlet of the heat preservation water pool, a first centrifugal pump and a water chilling unit are arranged on the cooling water circulation cooling pipeline, the input end of the front-section output pipeline is connected with an outlet of the heat preservation water pool, a first proportional valve, a water tank and a third centrifugal pump are arranged on the front-section output pipeline, and a first temperature sensor is arranged on the water tank. The output end of the rear-section backflow pipeline is connected with an inlet of the common water pool, and the rear-section backflow pipeline is further provided with a circulation branch connected with an inlet of the water tank. According to the utility model, the food processing quality can be better ensured, and the production cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of food processing, and particularly relates to an energy-saving cooling device. Background Technique

[0002] In recent years, consumers have higher and higher requirements for the stable quality of food. To meet the needs of consumers, food enterprises need to reduce the quality fluctuations in the production process as much as possible. This involves the processing of paste-like seasonings. After the paste-like seasonings are sterilized at 95-100 °C, they need to be cooled to 55-60 °C within 30-35 minutes to ensure the quality of the paste-like seasonings, and the cooling is achieved by a cooling device.

[0003] As Figure 2 Shown is an existing cooling device, which contains cooling water in a common water tank 2, and two circulation pipelines are connected to the common water tank 2. One of the circulation pipelines is used to cool the cooling water in the common water tank 2. This circulation pipeline transports the cooling water in the common water tank 2 to a cooling tower 28 for cooling through a first centrifugal pump 8. The cooling water cooled by the cooling tower 28 enters a water tank 14, and then is transported back to the common water tank 2 through a second centrifugal pump 27 to form a circulating cooling. The other circulation pipeline is used to cool the food in the production tank. This circulation pipeline transports the cooling water in the common water tank to the production tank through a third centrifugal pump 16. The cooling water flowing through the production tank will flow back to the common water tank 2, so that the cooling water circulates through the production tank to cool the food in the production tank.

[0004] The above-mentioned existing cooling device realizes the cooling of the food in the production tank, but it has the following defects:

[0005] 1. The existing cooling device uses a cooling tower 28. The working principle of the cooling tower 28 is mainly to exchange heat with the outside air naturally to achieve cooling. Therefore, it is greatly affected by the outside temperature. The specific manifestations in the operation process are as follows:

[0006] a. For the processing of the same kind of food, from May to September, due to the different outside air temperatures in the morning and afternoon (with a difference of 10 °C), the temperature difference of the cooling water will be 8-12 °C, resulting in inconsistent colors and flavors of the food produced in the morning and afternoon, and the food quality fluctuates.

[0007] b. For the processing of the same kind of food, the outside air temperatures in summer and winter are different. In winter, it takes 30-35 minutes to cool 1 tank of 5 tons of food. In summer, it takes 2-2.5 hours to cool 1 tank of 5 tons of food, resulting in excessive food reaction, dark color, and poor flavor, making the food have quality fluctuations in summer and winter.

[0008] 2. Cooling the food requires cooling water within a certain temperature range, and a large amount of cooling water is needed in a short period. The production time of food is generally from 10:00 am to 5:00 pm, which is within the peak period of electricity cost. The existing cooling devices need to cool the cooling water in the ordinary water tank during this period, which will undoubtedly increase the production cost. Summary of the Invention

[0009] The purpose of the present utility model is to provide an energy-saving cooling device, which can better ensure the quality of food processing and reduce the production cost.

[0010] The purpose of the present utility model is achieved through the following technical solutions:

[0011] An energy-saving cooling device, characterized in that it includes an ordinary water tank, a heat-insulated water tank, a cooling water circulation and cooling pipeline, a front-section output pipeline and a rear-section return pipeline. The outlets of the ordinary water tank and the heat-insulated water tank are respectively connected to the input end of the cooling water circulation and cooling pipeline. The output end of the cooling water circulation and cooling pipeline is connected to the inlet of the heat-insulated water tank. A first centrifugal pump and a water chiller are provided on the cooling water circulation and cooling pipeline. The input end of the front-section output pipeline is connected to the outlet of the heat-insulated water tank, and the output end of the front-section output pipeline is used to be connected to the cooling water inlet of the production tank. A first proportional valve, a water tank and a third centrifugal pump are provided on the front-section output pipeline. The first proportional valve is used to control the flow rate of the cooling water flowing from the heat-insulated water tank into the water tank. A first temperature sensor is provided on the water tank. The input end of the rear-section return pipeline is used to be connected to the cooling water outlet of the production tank, and the output end of the rear-section return pipeline is connected to the inlet of the ordinary water tank. A circulation branch connected to the inlet of the water tank is further provided on the rear-section return pipeline.

[0012] A further technical solution of the present utility model is that a second temperature sensor is provided on the rear-section return pipeline, and a second proportional valve is provided on the circulation branch.

[0013] A further technical solution of the present utility model is that the input end of the cooling water circulation and cooling pipeline is provided with a first branch and a second branch, the first branch and the second branch are respectively connected to the outlet of the ordinary water tank and the outlet of the heat-insulated water tank, and a first electric butterfly valve and a second electric butterfly valve are respectively provided on the first branch and the second branch.

[0014] A further technical solution of the present utility model is that the water chiller is an air-cooled water chiller.

[0015] A further technical solution of the present utility model is that the first centrifugal pump is arranged on the pipeline between the input end of the cooling water circulation and cooling pipeline and the water chiller.

[0016] A further technical solution of the present utility model is that the third centrifugal pump is arranged on the pipeline between the water tank and the output end of the front-section output pipeline.

[0017] A further technical solution of the utility model is as follows: the heat preservation water tank is provided with a first outlet and a second outlet, and the first outlet and the second outlet are respectively connected with the input end of the cooling water circulation cooling pipeline and the input end of the front-section output pipeline.

[0018] A further technical solution of the utility model is as follows: the water tank is provided with a first inlet and a second inlet, and the first inlet and the second inlet are respectively connected with the first proportional valve and the circulation branch.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1. The utility model cools the cooling water through the water chiller. The water chiller is basically not affected by the external temperature and can output more stably. Therefore, the cooling water with a set temperature can be obtained more stably, so that the cooling time of the food is maintained within the set time period, and the quality of food processing is better guaranteed.

[0021] For example, the following operations can be realized: the cooling water in the heat preservation water tank can be cooled to 2°C through the water chiller. During the production process, by adjusting the first proportional valve, the flow rate of the cooling water in the heat preservation water tank input into the water tank can be adjusted. After mixing with the water in the water tank, the cooling water at 20°C is obtained. The cooling water at 20°C is input into the production tank to cool the food in the production tank, which can ensure that the cooling time of the food is maintained within 30 - 35 minutes, so as to ensure the stable processing quality of the food throughout the year and all time periods.

[0022] 2. The utility model can, during the low-peak period of electricity consumption cost, first cool the cooling water through the water chiller and store the cooled cooling water in the heat preservation water tank. During production, the temperature is adjusted by mixing the cooling water in the water tank to obtain the temperature required for cooling the food. It can be seen that the utility model can stagger the high-peak period of electricity consumption cost to pre-cool the cooling water, thereby reducing the production cost.

[0023] The reduced production cost can be specifically reflected by the following example: assume that the produced cooling water at 2°C is cooled from 35°C to 2°C, and 50 tons of production are required for daily processing. Then the power consumption is about 1930 degrees. During the low-peak period of electricity consumption cost, the electricity price is 0.27 yuan / degree, and the total daily cooling cost is about 521.1 yuan. While the cost generated by the existing cooling device in the background technology for cooling the cooling water during the high-peak period of electricity consumption cost is about 1736 yuan (electricity price 1 yuan / degree). In comparison, the cost can be saved by 1215 yuan per day. It can be seen that the economic benefit that the utility model can generate is relatively high. Brief Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of the energy-saving cooling device of the utility model;

[0025] Figure 2 It is a schematic structural diagram of an existing cooling device.

[0026] Meanings of the reference numerals in the figure:

[0027] 1 - Heat preservation water tank; 2 - Ordinary water tank; 3 - Second fork; 4 - Second electric butterfly valve; 5 - First electric butterfly valve; 6 - First fork; 7 - Cooling water circulation and cooling pipeline; 8 - First centrifugal pump; 9 - Second outlet; 10 - Chiller; 11 - First outlet; 12 - Front - stage output pipeline; 13 - First proportional valve; 14 - Water tank; 15 - Inlet of the heat preservation water tank; 16 - Third centrifugal pump; 17 - Outlet of the ordinary water tank; 18 - Rear - stage return pipeline; 19 - Second proportional valve; 20 - Circulation branch; 21 - Second temperature sensor; 22 - First temperature sensor; 23 - Inlet of the ordinary water tank; 24 - First inlet; 25 - Second inlet; 26 - Outlet of the water tank; 27 - Second centrifugal pump; 28 - Cooling tower. Specific implementation manners

[0028] The following further describes the present utility model in conjunction with embodiments.

[0029] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model.

[0030] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, exceeding, etc. are understood as not including the present number, above, below, within, etc. are understood as including the present number. If the first and second are described only for the purpose of distinguishing technical features, they cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0031] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0032] Embodiment:

[0033] As Figure 1Shown is an energy-saving cooling device according to this embodiment, which includes a common water tank 2, a heat-insulated water tank 1, a cooling water circulation and cooling pipeline 7, a front-section output pipeline 12, and a rear-section return pipeline 18. The cooling water circulation and cooling pipeline 7 is used for circulating and cooling the cooling water. The front-section output pipeline 12 and the rear-section return pipeline 18 form a loop after being connected to the production tank, and are used for cooling the food in the production tank.

[0034] The outlets of the common water tank 2 and the heat-insulated water tank 1 are both arranged at the bottom, and the inlets are arranged at the top. The heat-insulated water tank 1 of this embodiment is provided with a first outlet 11 and a second outlet 9. The heat-insulated water tank 1 is a conventional water tank with a heat-insulating function, which can keep the internal cooling water warm.

[0035] The input end of the cooling water circulation and cooling pipeline 7 is provided with a first branch 6 and a second branch 3. The first branch 6 and the second branch 3 are respectively connected to the outlet 17 of the common water tank and the first outlet 11 of the heat-insulated water tank. A first electric butterfly valve 5 and a second electric butterfly valve 4 are respectively arranged on the first branch 6 and the second branch 3. The cooling water output from the common water tank 2 and the heat-insulated water tank 1 to the cooling water circulation and cooling pipeline 7 can be respectively controlled by the first electric butterfly valve 5 and the second electric butterfly valve 4. The output end of the cooling water circulation and cooling pipeline 7 is connected to the inlet 15 of the heat-insulated water tank. A first centrifugal pump 8 and a chiller 10 are arranged in sequence from the input end to the output end of the cooling water circulation and cooling pipeline 7.

[0036] The chiller 10 of this embodiment adopts an air-cooled chiller.

[0037] The input end of the front-section output pipeline 12 is connected to the second outlet 9 of the heat-insulated water tank, and the output end of the front-section output pipeline 12 is used to be connected to the cooling water inlet of the production tank. A first proportional valve 13, a water tank 14, and a third centrifugal pump 16 are arranged in sequence from the input end to the output end of the front-section output pipeline 12. The specific connection is as follows: The water tank 14 of this embodiment is provided with a first inlet 24 and a second inlet 25. The second outlet 9 of the heat-insulated water tank is connected to the first inlet 24 of the water tank through the first proportional valve 13. The first proportional valve 13 is used to control the flow rate of the cooling water flowing from the heat-insulated water tank 1 into the water tank 14. The outlet 26 of the water tank is connected to the third centrifugal pump 16.

[0038] A first temperature sensor 22 is arranged on the water tank 14. The first temperature sensor 22 is used to detect the temperature of the cooling water in the water tank 14. During use, the opening degree of the first proportional valve 13 can be controlled according to the temperature detected by the first temperature sensor 22, so as to control the temperature of the cooling water in the water tank 14.

[0039] The input end of the rear-stage return pipeline 18 is used to connect to the cooling water outlet of the production tank. The output end of the rear-stage return pipeline 18 is connected to the inlet 23 of the ordinary water tank. A circulation branch 20 is also provided on the rear-stage return pipeline 18, and the circulation branch 20 is connected to the second inlet 25 of the water tank. During use, a part of the cooling water flowing back through the rear-stage return pipeline 18 will be input into the water tank 14 from the circulation branch 20. Since the cooling water flowing back from the rear-stage return pipeline 18 has absorbed the heat of the food after flowing through the production tank, the temperature of the cooling water in the rear-stage return pipeline 18 is higher than that of the cooling water in the water tank 14. Inputting a part of the cooling water in the rear-stage return pipeline 18 into the water tank 14 can adjust the temperature of the cooling water in the water tank 14.

[0040] In this embodiment, a second temperature sensor 21 is provided on the rear-stage return pipeline 18. The second temperature sensor 21 is used to detect the temperature of the cooling water in the rear-stage return pipeline 18. A second proportional valve 19 is provided on the circulation branch 20. During use, it can be realized to control the opening degree of the second proportional valve 19 according to the temperature detected by the second temperature sensor 21, so as to control the flow rate of the cooling water flowing back into the water tank 14, and thus better adjust the temperature of the cooling water in the water tank 14.

[0041] The general principle of controlling the opening degree of the second proportional valve 19 by the second temperature sensor 21 is as follows: During the process of cooling the food in the production tank, the temperature of the food is continuously decreasing. Therefore, the temperature of the cooling water flowing from the production tank into the rear-stage return pipeline 18 also changes from high to low. When the temperature of the cooling water in the rear-stage return pipeline 18 is relatively high at the beginning, the opening degree of the second proportional valve 19 can be adjusted to be small, so that not too much cooling water flows back from the circulation branch 20 to the water tank 14. And during the process of the temperature of the cooling water in the rear-stage return pipeline 18 gradually decreasing, the opening degree of the second proportional valve 19 is also gradually adjusted to be large, so that the cooling water flowing back from the circulation branch 20 to the water tank 14 gradually increases. In this way, it can better ensure the constancy of the temperature of the cooling water in the water tank 14.

[0042] A specific usage process of the energy-saving cooling device in this embodiment is as follows:

[0043] During the low peak period of electricity consumption cost, generally from 00:00 to 8:00 in the early morning, first close the second electric butterfly valve 4, open the first electric butterfly valve 5, start the first centrifugal pump 8 and the chiller 10. The cooling water in the ordinary water tank 2 will enter the cooling water circulation and cooling pipeline 7 from the first branch 6, and then flow through the first centrifugal pump 8 and the chiller 10 and then flow into the heat preservation water tank 1. During this process, the chiller 10 preliminarily cools the cooling water.

[0044] After all the cooling water in the ordinary water pool 2 is transferred to the insulation water pool 1, the first electric butterfly valve 5 is closed and the second electric butterfly valve 4 is opened. The cooling water in the insulation water pool 1 will enter the cooling water circulation cooling pipeline 7 from the second branch 3, and then flow through the first centrifugal pump 8 and the chiller 10 and return to the insulation water pool 1 to form a cycle. The cooling water in the insulation water pool 1 is continuously cooled by the chiller 10 until the cooling water in the insulation water pool 1 reaches 2°C. Finally, 50 tons of cooling water at 2°C are produced, and then the first centrifugal pump 8 and the chiller 10 are closed, and the second electric butterfly valve 4 is closed.

[0045] During the food production period during the day, when the food in the production tank needs to be cooled, the third centrifugal pump 16, the first proportional valve 13 and the second proportional valve 19 are started, and the 2°C cooling water in the thermal insulation pool 1 will first enter the water tank 14 of the front output pipeline 12, and be mixed in the water tank 14. Through the adjustment of the proportional valve, the temperature of the cooling water in the water tank 14 reaches 20°C. The cooling water in the water tank 14 enters the production tank after passing through the third centrifugal pump 16. The cooling water flowing through the production tank will take away the heat of the food and flow into the rear return pipeline 18. The temperature of the cooling water in the rear return pipeline 18 will be higher than that of the cooling water in the water tank 14. Part of the cooling water in the rear return pipeline 18 will flow back to the common water pool 2, and the other part will flow into the water tank 14 through the circulation branch 20 for temperature adjustment.

[0046] In order to better realize automation, the energy-saving cooling device of this embodiment can also be provided with a PLC controller, and the signal output end of the first temperature sensor 22, the signal output end of the second temperature sensor 21, the control end of the first proportional valve 13 and the control end of the second proportional valve 19 are respectively connected to the PLC controller with wires, and the PLC controller controls the opening of the proportional valve through the temperature signal fed back by the temperature sensor.

[0047] The above-mentioned embodiments of the utility model are not intended to limit the protection scope of the utility model, and the implementation methods of the utility model are not limited to these. All other various forms of modifications, replacements or changes made to the above-mentioned structure of the utility model based on the above-mentioned contents of the utility model, in accordance with the common technical knowledge and customary means in the field, without departing from the above-mentioned basic technical ideas of the utility model, should fall within the protection scope of the utility model.

Claims

1. An energy-saving cooling device, characterized in that: It includes an ordinary water tank, an insulation water tank, a cooling water circulation and cooling pipeline, a front-end output pipeline and a rear-end reflux pipeline. The outlets of the ordinary water tank and the insulation water tank are respectively connected to the input ends of the cooling water circulation and cooling pipeline, the output end of the cooling water circulation and cooling pipeline is connected to the inlet of the insulation water tank, a first centrifugal pump and a chiller are arranged on the cooling water circulation and cooling pipeline, the input end of the front-end output pipeline is connected to the outlet of the insulation water tank, the output end of the front-end output pipeline is used to be connected to the cooling water inlet of the production tank, a first proportional valve, a water tank and a third centrifugal pump are arranged on the front-end output pipeline, the first proportional valve is used to control the flow rate of cooling water flowing from the insulation water tank into the water tank, a first temperature sensor is arranged on the water tank, the input end of the rear-end reflux pipeline is used to be connected to the cooling water outlet of the production tank, the output end of the rear-end reflux pipeline is connected to the inlet of the ordinary water tank, and a circulation branch connected to the inlet of the water tank is also arranged on the rear-end reflux pipeline.

2. The energy-saving cooling device according to claim 1, characterized in that: A second temperature sensor is provided on the rear section return pipeline, and a second proportional valve is provided on the circulation branch.

3. The energy-saving cooling device according to claim 1, characterized in that: The input end of the cooling water circulation cooling pipeline is provided with a first fork and a second fork, the first fork and the second fork are respectively connected to the outlet of the ordinary water pool and the outlet of the insulation water pool, and the first fork and the second fork are respectively provided with a first electric butterfly valve and a second electric butterfly valve.

4. The energy-saving cooling device according to claim 1, characterized in that: The chiller is an air-cooled chiller.

5. The energy-saving cooling device according to claim 1, characterized in that: The first centrifugal pump is arranged on a pipeline between the input end of the cooling water circulation and temperature reduction pipeline and the chiller.

6. The energy-saving cooling device according to claim 1, characterized in that: The third centrifugal pump is arranged on the pipeline between the water tank and the output end of the front-stage output pipeline.

7. The energy-saving cooling device according to claim 1, characterized in that: The heat preservation water pool is provided with a first outlet and a second outlet, and the first outlet and the second outlet are respectively connected to the input end of the cooling water circulation cooling pipeline and the input end of the front-end output pipeline.

8. The energy-saving cooling device according to claim 1, characterized in that: The water tank is provided with a first inlet and a second inlet, and the first inlet and the second inlet are connected to the first proportional valve and the circulation branch respectively.

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