Coupling type cooling device and control system

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By designing a coupled cooling device in the electrophoresis process line of the coating workshop and storing the cooling capacity during the low-trough electricity period, the problem of high load operation of the refrigerator in the non-trough electricity period in the existing technology is solved, and energy saving and economic benefits are improved.

CN222865328UActive Publication Date: 2025-05-13SCIVIC ENG CORP +1

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Patent Information

Application Number: CN202421502907.3
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-06-28
Publication Date: 2025-05-13
Estimated Expiration: 2034-06-28

AI Technical Summary

Technical Problem

The existing electrophoresis process line in the coating workshop needs to be cooled all day long during continuous operation 24 hours a year, resulting in high load operation of the refrigerator during non-trough electricity periods, which consumes a lot of electricity bills and is not conducive to energy saving.

Method used

A coupled cooling device is designed, including a refrigerator, energy storage tank, heat exchanger and control system, which reduces the high load operation of the refrigerator by storing the cooling capacity during the low-groove electrical period and using the stored cooling capacity during the non-trough electrical period.

Benefits of technology

It realizes the storage of cold capacity during the low-trough electricity period and efficient utilization during the non-trough electricity period, reduces electricity consumption costs, reduces equipment wear and maintenance costs, and has good energy-saving effects and economic benefits.

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Abstract

The utility model discloses a coupling type cold supply device which comprises a refrigerating machine, an energy storage tank, a heat exchanger and a to-be-cooled station, a first pipeline and a second pipeline are sequentially arranged among the refrigerating machine, the energy storage tank, the heat exchanger and the to-be-cooled station, the second pipeline is connected with the first pipeline in parallel, and a variable frequency water pump is arranged between the energy storage tank and the heat exchanger. According to the device, cold storage is conducted on the energy storage tank in the off-peak electricity period, cold supply is conducted on the coating electrophoresis process through the heat exchanger, in the non-off-peak electricity period, only the chilled water pump on the energy discharging side needs to be started, chilled water in the energy storage tank is extracted, and the energy storage tank is cooled through the variable-frequency water pump. The heat exchanger is used for cooling the coating electrophoresis process, the initial investment of engineering practice is relatively saved, the running effect of the refrigerating machine can be improved after reasonable running, the electricity utilization cost in the non-off-peak electricity period is saved, the standby power supply utilization rate in the non-off-peak electricity period is reduced, and the energy-saving effect and economic benefits are good.

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Description

Technical Field

[0001] The utility model relates to the technical field of energy storage type cooling, in particular to a coupled cooling device and a control system. Background Art

[0002] The electrophoretic process line in the painting workshop operates continuously for 24 hours a day throughout the year. The electrophoretic paint used in the electrophoretic process line must be guaranteed to work at an appropriate temperature. When the electrophoretic process line is working stably, the temperature of the electrophoretic paint will increase with the room temperature, and the process equipment will generate heat. This heat needs to be taken away in time to ensure that the temperature of the electrophoretic paint is within an appropriate range.

[0003] At present, the electrophoretic process line in the painting workshop directly uses a refrigerator to prepare chilled water, and provides cold water of about 20°C for the electrophoretic paint through a heat exchanger. Since the electrophoretic process line in the painting workshop needs to be cooled 24 hours a day throughout the year, a backup power supply must be set for the chilled water preparation system to prevent power outages; turning on the refrigerator during non-peak hours requires a lot of electricity, which is not conducive to energy conservation. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a coupled cooling device and a control system to solve the problems.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A coupled cooling device comprises a refrigerator, an energy storage tank, a heat exchanger and a workstation to be cooled. A first pipeline and a second pipeline connected in parallel with the first pipeline are sequentially arranged between the refrigerator, the energy storage tank, the heat exchanger and the workstation to be cooled. A variable frequency water pump is arranged between the energy storage tank and the heat exchanger. A fixed frequency water pump is arranged between the refrigerator and the energy storage tank. The variable frequency water pump is connected in parallel with the fixed frequency water pump.

[0007] It is further configured as follows: the first pipeline is arranged in parallel with the second pipeline, and the first pipeline is located below the second pipeline.

[0008] It is further configured as follows: the variable frequency water pump is arranged on the first pipeline between the energy storage tank and the heat exchanger, and the water pumping end of the variable frequency water pump is arranged on the side close to the energy storage tank, and the water outlet end is arranged on the side close to the heat exchanger.

[0009] It is further configured as follows: the constant frequency water pump is arranged on the second pipeline between the refrigerator and the energy storage tank, and the water pumping end of the constant frequency water pump is arranged on the side close to the energy storage tank, and the water outlet end is arranged on the side close to the refrigerator.

[0010] It is further configured as follows: a first electric regulating valve is provided on the first pipeline between the refrigerator and the energy storage tank.

[0011] It is further configured that: a first temperature sensor is also arranged on the first pipeline between the energy storage tank and the heat exchanger.

[0012] It is further configured that: a second temperature sensor is arranged on the first pipeline between the heat exchanger and the station to be cooled.

[0013] It is further configured as follows: a second electric regulating valve and a third temperature sensor are also provided on the second pipeline between the refrigerator and the energy storage tank.

[0014] It is further configured that: a fourth temperature sensor is provided on the second pipeline between the heat exchanger and the station to be cooled.

[0015] The utility model also relates to a control system of a coupled cooling device, including a controller coupled to a refrigerator, a fixed-frequency water pump, a variable-frequency water pump, a first electric regulating valve and a second electric regulating valve, and the controller is simultaneously coupled to a first temperature sensor, a second temperature sensor, a third temperature sensor and a fourth temperature sensor.

[0016] Compared with the prior art, the beneficial technical effects of the utility model are:

[0017] The utility model is applied in engineering practice. During the off-peak electricity period, the energy storage tank is cold stored and the coating electrophoresis process is cooled through a heat exchanger. During the non-off-peak electricity period, only the discharge side chilled water pump needs to be turned on to extract the chilled water in the energy storage tank and the coating electrophoresis process is cooled through a heat exchanger. The initial investment in engineering practice is relatively low. After reasonable operation, the operation effect of the refrigerator can be improved, the electricity cost during the non-off-peak electricity period can be saved, and the utilization rate of the standby power supply during the non-off-peak electricity period can be reduced. It has good energy-saving effect and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is the principle diagram of the utility model;

[0020] Figure 2 This is a control principle diagram of the controller of the utility model.

[0021] Figure numerals: 1. Refrigeration machine; 2. Energy storage tank; 3. Heat exchanger; 4. Electrophoresis process line in paint shop; 5. First pipeline; 6. Second pipeline; 7. First electric regulating valve; 8. First temperature sensor; 9. Variable frequency water pump; 10. Second temperature sensor; 11. Fixed frequency water pump; 12. Second electric regulating valve; 13. Third temperature sensor; 14. Fourth temperature sensor. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Example

[0026] Reference Figure 1 and Figure 2 , is a coupled cooling device disclosed in the utility model, including a refrigerator 1, an energy storage tank 2, and a heat exchanger 3, wherein the refrigerator 1 is used to prepare chilled water, the energy storage tank 2 is a pressure tank with a pressure of 0.8MPa, the energy storage side of the energy storage tank 2 is connected in series with the refrigerator 1, and is used to store the chilled water prepared by the refrigerator 1 in the energy storage tank 2, the energy release side of the energy storage tank 2 is connected in series with the heat exchanger 3, and the heat exchanger 3 is connected in series with the electrophoresis process line 4 of the coating workshop.

[0027] Specifically, a first pipeline 5 is sequentially connected between the refrigerator 1, the energy storage tank 2, the heat exchanger 3 and the electrophoresis process line 4 of the painting workshop, and a second pipeline 6 for reflux and connected in parallel with the first pipeline 5 is sequentially connected between the refrigerator 1, the energy storage tank 2, the heat exchanger 3 and the electrophoresis process line 4 of the painting workshop. In this embodiment, the first pipeline 5 and the second pipeline 6 are arranged in parallel, and the first pipeline 5 is located below the second pipeline 6;

[0028] Specifically, a first electric regulating valve 7 is provided on the first pipeline 5 between the refrigerator 1 and the energy storage tank 2, and a first temperature sensor 8 and a variable frequency water pump 9 are sequentially provided on the first pipeline 5 between the energy storage tank 2 and the heat exchanger 3, wherein the pumping end of the variable frequency water pump 9 is provided on a side close to the energy storage tank 2, and the water outlet end is provided on a side close to the heat exchanger 3; a second temperature sensor 10 is provided on the first pipeline 5 between the heat exchanger 3 and the electrophoresis process line 4 of the coating workshop;

[0029] A fixed-frequency water pump 11, a second electric regulating valve 12 and a third temperature sensor 13 are sequentially arranged on the second pipeline 6 between the refrigerator 1 and the energy storage tank 2, wherein the water pumping end of the fixed-frequency water pump 11 is arranged on the side close to the energy storage tank 2, and the water outlet end is arranged on the side close to the refrigerator 1; a fourth temperature sensor 14 is arranged on the second pipeline 6 between the heat exchanger 3 and the electrophoresis process line 4 of the coating workshop;

[0030] The utility model also discloses a control system for a coupled cooling device, including a controller coupled to a refrigerator 1, a fixed-frequency water pump 11, a variable-frequency water pump 9, a first electric regulating valve 7, and a second electric regulating valve 12, and controlling the opening and closing of the five. The controller is coupled to four temperature sensors at the same time. The controller is used to compare the measured value of the third temperature sensor 13 with the set value, and then control the refrigeration power of the refrigerator 1 according to the comparison information; illustratively, when the measured value of the third temperature sensor 13 is greater than the set value, the refrigeration power of the refrigerator 1 is increased, otherwise, the refrigeration power is decreased;

[0031] The controller is also used to compare the measured value of the second temperature sensor 10 with the set value, and then control the motor speed of the variable frequency water pump 9 according to the comparison information. For example, when the measured value of the second temperature sensor 10 is greater than the set value, the motor speed of the variable frequency water pump 9 is increased, otherwise, the motor speed is decreased;

[0032] In this embodiment, the variable frequency water pump 9 and the heat exchanger 3 are in a 24-hour open state. The variable frequency water pump 9 pumps out the cold water in the energy storage tank 2 and transfers the cold energy stored in the heat exchanger 3 to the electrophoresis process line 4 in the coating workshop;

[0033] During the off-peak period, it is the energy storage stage. In this stage, energy is stored while water cooling the electrophoresis process line 4 in the paint shop. Specifically, the refrigerator 1, the fixed-frequency water pump 11, the first electric regulating valve 7, and the second electric regulating valve 12 are turned on to prepare chilled water from the refrigerator 1. The chilled water is stored in the energy storage tank 2 through the first electric regulating valve 7. The coldness in the energy storage tank 2 is transferred to the electrophoresis process line 4 in the paint shop through the variable-frequency water pump 9 and the heat exchanger 3. Under the action of the fixed-frequency water pump 11, the warmed water is finally pumped to the refrigerator 1 along the second pipeline through the energy storage tank 2 for circulating refrigeration, so that the cold water in the energy storage tank 2 always maintains the best coldness.

[0034] At this time, the controller controls the refrigeration power of the refrigerator 1 according to the measurement value of the third temperature sensor 13 to maintain the energy storage effect.

[0035] When the power is not off-peak, it is the energy release stage. In this stage, the cold water in the energy storage tank 2 is mainly used to cool the electrophoresis process line 4 in the painting workshop. Specifically, the refrigerator 1, the fixed-frequency water pump 11, the first electric regulating valve 7, and the second electric regulating valve 12 are turned off. The cold water in the energy storage tank 2 is used to cool the electrophoresis process line 4 in the painting workshop. At this time, the water in the cold storage tank will gradually return to temperature;

[0036] At this time, the controller controls the motor speed of the variable frequency water pump 9 according to the measurement value of the second temperature sensor 10 to maintain the water cooling and heat dissipation effect.

[0037] When the electricity is at off-peak again, the refrigerator 1, the constant-frequency water pump 11, the first electric regulating valve 7 and the second electric regulating valve 12 are restarted to perform energy storage refrigeration circulating in the cold storage tank.

[0038] Since the electricity price is lower during off-peak hours (usually at night or off-peak hours), the utility model turns on the refrigerator 1 to store cooling energy during off-peak hours, and uses the stored cooling energy during off-peak hours, which can reduce electricity costs. In addition, operating the refrigerator 1 during off-peak hours can avoid high-load operation during peak hours, reduce equipment wear, extend equipment life, and reduce maintenance costs.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A coupled cooling device, characterized in that: The invention comprises a refrigerator (1), an energy storage tank (2), a heat exchanger (3) and a workstation to be cooled. A first pipeline (5) and a second pipeline (6) arranged in parallel with the first pipeline (5) are arranged in sequence between the refrigerator (1), the energy storage tank (2), the heat exchanger (3) and the workstation to be cooled. A variable frequency water pump (9) is arranged between the energy storage tank (2) and the heat exchanger (3). A fixed frequency water pump (11) is arranged between the refrigerator (1) and the energy storage tank (2). The variable frequency water pump (9) and the fixed frequency water pump (11) are arranged in parallel.

2. A coupled cooling device according to claim 1, characterized in that: The first pipeline (5) and the second pipeline (6) are arranged in parallel, and the first pipeline (5) is located below the second pipeline (6).

3. A coupled cooling device according to claim 2, characterized in that: The variable frequency water pump (9) is arranged on the first pipe (5) between the energy storage tank (2) and the heat exchanger (3), and the water pumping end of the variable frequency water pump (9) is arranged on a side close to the energy storage tank (2), and the water outlet end is arranged on a side close to the heat exchanger (3).

4. A coupled cooling device according to claim 3, characterized in that: The fixed-frequency water pump (11) is arranged on the second pipe (6) between the refrigerator (1) and the energy storage tank (2), and the water pumping end of the fixed-frequency water pump (11) is arranged on a side close to the energy storage tank (2), and the water outlet end is arranged on a side close to the refrigerator (1).

5. A coupled cooling device according to claim 4, characterized in that: A first electric regulating valve (7) is provided on the first pipeline (5) between the refrigerator (1) and the energy storage tank (2).

6. A coupled cooling device according to claim 5, characterized in that: A first temperature sensor (8) is also provided on the first pipeline (5) between the energy storage tank (2) and the heat exchanger (3).

7. The coupled cooling device according to claim 6, characterized in that: A second temperature sensor (10) is provided on the first pipeline (5) between the heat exchanger (3) and the station to be cooled.

8. The coupled cooling device according to claim 7, characterized in that: A second electric regulating valve (12) and a third temperature sensor (13) are also provided on the second pipeline (6) between the refrigerator (1) and the energy storage tank (2).

9. The coupled cooling device according to claim 8, characterized in that: A fourth temperature sensor (14) is provided on the second pipeline (6) between the heat exchanger (3) and the station to be cooled.

10. A control system for a coupled cooling device, applied to the coupled cooling device according to any one of claims 1 to 9, characterized in that: The invention comprises a controller coupled to a refrigerator (1), a fixed-frequency water pump (11), a variable-frequency water pump (9), a first electric regulating valve (7) and a second electric regulating valve (12); the controller is also coupled to a first temperature sensor (8), a second temperature sensor (10), a third temperature sensor (13) and a fourth temperature sensor (14).