Circulation cooling system

Abstract

The present invention relates to the technical field of automobile manufacturing, and provides a circulating cooling system including: a first infusion channel for conveying cooling water, a second infusion channel for conveying hydraulic oil, a third infusion channel for conveying cleaning fluid, a first heat exchanger, and a second heat exchanger; the first infusion channel and the second infusion channel perform heat exchange through the first heat exchanger; the second infusion channel and the third infusion channel perform heat exchange through the second heat exchanger. The cleaning fluid cools the hydraulic oil, and the waste heat generated by the hydraulic oil heats up the cleaning fluid, which greatly improves the efficiency of heat energy use and reduces the energy consumed in the process of heating up the cleaning fluid and cooling down the hydraulic oil.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile manufacturing, and more specifically, relates to a circulating cooling system. Background Art

[0002] In the process of modern automobile production, parts often need to be cleaned through cleaning equipment; parts often need to be squeezed / stretched (such as through: drawing press) stretching equipment during the production process; cleaning equipment usually needs to be cleaned with cleaning fluid (such as water / oil), and the cleaning fluid usually needs additional heating to improve the cleaning effect. Stretching equipment squeezes and stretches the product hydraulically, and the temperature of the hydraulic oil in the stretching equipment is very high (up to 120℃), and the hydraulic oil needs to be cooled by external cooling equipment after working. The cleaning fluid needs to consume a lot of energy in the process of heating up and the hydraulic oil in the process of cooling down. Summary of the invention

[0003] The object of the present invention is to provide a circulating cooling system to solve the technical problem in the prior art that a large amount of energy is consumed in the process of heating up the cleaning fluid and in the process of cooling down the hydraulic oil.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a circulating cooling system including: a first infusion channel for cooling water, a second infusion channel for hydraulic oil, a third infusion channel for cleaning fluid, a first heat exchanger, and a second heat exchanger; heat exchange is performed between the first infusion channel and the second infusion channel through the first heat exchanger; heat exchange is performed between the second infusion channel and the third infusion channel through the second heat exchanger.

[0005] Furthermore, there are multiple second heat exchangers; and the multiple second heat exchangers are arranged along the second infusion channel.

[0006] Furthermore, it also includes a first solenoid valve, a second solenoid valve, and a fourth infusion channel;

[0007] The first solenoid valve is arranged on the first infusion channel;

[0008] The second solenoid valve is a two-position three-way solenoid valve; the second solenoid valve has a liquid inlet, a first liquid discharge port, and a second liquid discharge port; one end of the second infusion channel is connected to the liquid inlet, and the other end of the second infusion channel is connected to the first liquid discharge port; one end of the fourth infusion channel is connected to the second liquid discharge port, and the other end of the fourth infusion channel is connected to the second infusion channel downstream of the second heat exchanger.

[0009] Furthermore, a first temperature sensor is provided on the second infusion channel upstream of the first heat exchanger; a second temperature sensor is provided on the second infusion channel downstream of the intersection of the fourth infusion channel and the second infusion channel; and a third temperature sensor is provided on the third infusion channel.

[0010] Further, the third temperature sensor is located downstream of the second heat exchanger.

[0011] Further, when the temperature detected by the second temperature sensor is greater than 60° C., the first liquid discharge port is closed, the second liquid discharge port is opened, and the first solenoid valve is opened;

[0012] When the temperature detected by the second temperature sensor is less than 45° C., and when the temperature detected by the third temperature sensor is less than or equal to 40° C., the first drain port is opened, the second drain port is closed, and the first solenoid valve is closed.

[0013] Further, when the temperature detected by the second temperature sensor is greater than or equal to 45°C, when the temperature detected by the second temperature sensor is less than or equal to 60°C, and when the temperature detected by the third temperature sensor is less than or equal to 40°C; the first drain port is opened, the second drain port is closed, and the first solenoid valve is opened.

[0014] Furthermore, a first pump body is provided on the second infusion channel upstream of the second temperature sensor, and a second pump body is provided on the third infusion channel downstream of the second heat exchanger.

[0015] Furthermore, a first filter is provided on the first infusion channel, and / or a second filter is provided on the second infusion channel.

[0016] Furthermore, the maximum power of the first heat exchanger is 70 kW; the maximum power of the second heat exchanger is 5 kW.

[0017] The beneficial effects of the circulating cooling system provided by the present invention are as follows: compared with the prior art, in the circulating cooling system provided by the present invention, cooling water is transported along the first infusion channel, and the cooling water exchanges heat with the hydraulic oil in the second infusion channel through the first heat exchanger to cool the temperature of the hydraulic oil; when the temperature of the hydraulic oil flows in the second infusion channel, the heat is transferred to the cleaning fluid in the third infusion channel through the second heat exchanger, thereby heating the cleaning fluid; the additional energy consumed in the heating process of the cleaning fluid is reduced; that is, the cleaning fluid cools the hydraulic oil, and the waste heat generated by the hydraulic oil heats the cleaning fluid, which greatly improves the use efficiency of thermal energy and reduces the energy required to be consumed in the heating process of the cleaning fluid and in the cooling process of the hydraulic oil. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 1 A schematic diagram of the principle of a circulating cooling system provided by an embodiment of the present invention;

[0020] Figure 2 A three-dimensional schematic diagram of a circulating cooling system provided by an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of a control circuit of a first pump body and a second pump body provided in an embodiment of the present invention;

[0022] Figure 4 A schematic diagram of a control circuit of a first solenoid valve, a second solenoid valve, and a third solenoid valve provided in an embodiment of the present invention;

[0023] Figure 5 A control schematic diagram of a remote digital output module (model: AJ65SBTB2N-8R) of Mitsubishi Corporation (Group) provided in an embodiment of the present invention;

[0024] Figure 6 A control schematic diagram of a remote digital input module (model: AJ65SBTB1-8D) of Mitsubishi Corporation (Group) provided in an embodiment of the present invention;

[0025] Figure 7 A control schematic diagram of a remote analog output module (model: AJ65SBT-62DA) of Mitsubishi Corporation (Group) provided in an embodiment of the present invention.

[0026] Among them, the reference numerals in the figure are:

[0027] 11-first infusion channel; 12-second infusion channel; 13-third infusion channel; 14-fourth infusion channel; 21-first heat exchanger; 22-second heat exchanger; 31-first solenoid valve; 32-second solenoid valve; 33-third solenoid valve; 34-check valve; 35-flow regulating valve; 41-first temperature sensor; 42-second temperature sensor; 43-third temperature sensor; 51-first pump body; 52-second pump body; 61-first filter; 62-second filter; 63-third filter; 71-cleaning equipment; 72-stretching equipment. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0030] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] Please also read Figure 1 and Figure 2 The circulating cooling system provided by the present invention is now described. The circulating cooling system includes: a first infusion channel 11 for conveying cooling water, a second infusion channel 12 for conveying hydraulic oil, a third infusion channel 13 for conveying cleaning fluid, a first heat exchanger 21, and a second heat exchanger 22; the first infusion channel 11 and the second infusion channel 12 perform heat exchange through the first heat exchanger 21; the second infusion channel 12 and the third infusion channel 13 perform heat exchange through the second heat exchanger 22.

[0033] In this way, cooling water is transported along the first infusion channel 11, and the cooling water exchanges heat with the hydraulic oil in the second infusion channel 12 through the first heat exchanger 21 to cool the temperature of the hydraulic oil; when the hydraulic oil flows in the second infusion channel 12, the heat is transferred to the cleaning fluid in the third infusion channel 13 through the second heat exchanger 22, thereby heating the cleaning fluid; reducing the additional energy consumed in the heating process of the cleaning fluid; that is, the cleaning fluid cools the hydraulic oil, and the waste heat generated by the hydraulic oil heats up the cleaning fluid, which greatly improves the efficiency of thermal energy use and reduces the energy required for the cleaning fluid in the process of heating up and the hydraulic oil in the process of cooling down.

[0034] Specifically, in one embodiment, the first infusion channel 11 is a plastic / metal tube. Specifically, in one embodiment, the second infusion channel 12 is a plastic / metal tube. Specifically, in one embodiment, the third infusion channel 13 is a plastic / metal tube.

[0035] Specifically, in one embodiment, the second heat exchanger 22 includes a heat conducting member, a first heat conducting pipe (heat conducting pipe: such as a copper pipe) and a second heat conducting pipe; the hydraulic oil flows through the first heat conducting pipe, the cleaning fluid flows through the second heat conducting pipe, and the hydraulic oil and the cleaning fluid are heat-conducted through the heat conducting member. Specifically, in one embodiment, the second heat exchanger 22 has the same principle as the first heat exchanger 21.

[0036] Specifically, in one embodiment, the first infusion channel 11 is a cleaning liquid pipeline of a cleaning device 71 (such as a cleaning machine). Specifically, in one embodiment, the second infusion channel 12 is a hydraulic oil pipeline of a stretching device 72 (such as a calendering machine).

[0037] Specifically, in one embodiment, the cleaning liquid is a flammable liquid with a flash point of (70-80° C.).

[0038] Specifically, in one embodiment, the cleaning mechanism of the cleaning device is located on the third infusion channel 13 downstream of the second heat exchanger 22. Specifically, in one embodiment, the stretching mechanism of the stretching device 72 is located on the second infusion channel 12 upstream of the first heat exchanger 21.

[0039] For further information, see Figure 1 and Figure 2As a specific embodiment of the circulating cooling system provided by the present invention, there are multiple second heat exchangers 22; multiple second heat exchangers 22 are arranged along the second infusion channel 12. In this way, when the second infusion channel 12 transfers heat to the third infusion channel 13 through multiple second heat exchangers 22, each second heat exchanger 22 can share power to avoid excessive exchange power of a single second heat exchanger 22 (because the cleaning fluid is sometimes oil, and excessive power of a single second heat exchanger 22 is likely to cause the oil to heat up too quickly and cause a fire).

[0040] For further information, see Figure 1 and Figure 2 As a specific embodiment of the circulating cooling system provided by the present invention, it also includes a first solenoid valve 31, a second solenoid valve 32, and a fourth infusion channel 14; the first solenoid valve 31 is arranged on the first infusion channel 11; the second solenoid valve 32 is a two-position three-way solenoid valve; the second solenoid valve 32 has an inlet, a first discharge port and a second discharge port; one end of the second infusion channel 12 is connected to the inlet, and the other end of the second infusion channel 12 is connected to the first discharge port; one end of the fourth infusion channel 14 is connected to the second discharge port, and the other end of the fourth infusion channel 14 is connected to the second infusion channel 12 downstream of the second heat exchanger 22. In this way, when the liquid (such as hydraulic oil) in the second infusion channel 12 flows through the second solenoid valve 32, it can continue to flow along the second infusion channel 12 through the first drain port, so that the second infusion channel 12 can perform heat exchange through the second heat exchanger 22; when the liquid (such as hydraulic oil) in the second infusion channel 12 flows through the second solenoid valve 32, it can also enter the fourth infusion channel 14 through the second drain port, bypass the second heat exchanger 22 and continue to flow directly along the second infusion channel 12, thereby reducing the heat exchange at the second heat exchanger 22.

[0041] Specifically, in one embodiment, a third solenoid valve 33 is provided on the third infusion channel 13 upstream of the second heat exchanger 22. Thus, the third solenoid valve 33 controls the flow in the third infusion channel 13 to control the heat exchange amount between the third infusion channel 13 and the second heat exchanger 22.

[0042] Specifically, in one embodiment, a flow regulating valve 35 is provided on the first infusion channel 11 between the first solenoid valve 31 and the first heat exchanger 21 , so that the user can control the liquid flow in the first infusion channel 11 to control the heat exchange amount at the first heat exchanger 21 .

[0043] For further information, see Figure 1 and Figure 2As a specific embodiment of the circulating cooling system provided by the present invention, a first temperature sensor 41 is provided on the second infusion channel 12 upstream of the first heat exchanger 21; a second temperature sensor 42 is provided on the second infusion channel 12 downstream of the intersection of the fourth infusion channel 14 and the second infusion channel 12; and a third temperature sensor 43 is provided on the third infusion channel 13. In this way, the user can effectively obtain the temperature of the hydraulic oil in the second infusion channel 12 before reaching the first heat exchanger 21 through the first temperature sensor 41; the user can effectively obtain the temperature of the hydraulic oil in the second infusion channel 12 after passing through the second heat exchanger 22 through the second temperature sensor 42; the user can effectively obtain the temperature of the cleaning liquid in the third infusion channel 13 through the third temperature sensor 43; it is convenient for the user to monitor the temperature in the second infusion channel 12 and the third infusion channel 13, and provide a reference for the user to increase / decrease the power of the first heat exchanger 21 and the second heat exchanger 22.

[0044] Specifically, in one embodiment, a one-way valve 34 is provided on the second infusion channel 12. In this way, the backflow of the liquid in the second infusion channel 12 is avoided. Specifically, in one embodiment, the one-way valve 34 is located downstream of the second heat exchanger 22, and the one-way valve 34 is located upstream of the intersection of the fourth infusion channel 14 and the second infusion channel 12. In this way, the liquid in the fourth infusion channel 14 will not reverse along the second infusion channel 12 to pass through the second heat exchanger 22, thereby avoiding the liquid flowing along the fourth infusion channel 14 interfering with the operation of the second heat exchanger 22, and ensuring the stability of the operation of the second heat exchanger 22.

[0045] For further information, see Figure 1 and Figure 2 As a specific embodiment of the circulating cooling system provided by the present invention, the third temperature sensor 43 is located downstream of the second heat exchanger 22. In this way, the third temperature sensor 43 can detect the liquid temperature of the liquid in the third infusion channel 13 after passing through the second heat exchanger 22, which is convenient for the user to monitor the working state of the second heat exchanger 22.

[0046] For further information, see Figure 1 and Figure 2 As a specific embodiment of the circulating cooling system provided by the present invention, when the temperature detected by the second temperature sensor 42 is greater than 60°C, the first drain port is closed, the second drain port is opened, and the first solenoid valve 31 is opened;

[0047] When the temperature detected by the second temperature sensor 42 is less than 45° C., and when the temperature detected by the third temperature sensor 43 is less than or equal to 40° C., the first drain port is opened, the second drain port is closed, and the first solenoid valve 31 is closed.

[0048] In this way, when the temperature detected by the second temperature sensor 42 is greater than 60°C, the hydraulic oil in the second infusion channel 12 does not pass through the second heat exchanger 22, so as to avoid the excessively high liquid temperature in the second infusion channel 12 affecting the cleaning liquid; part of the liquid in the second infusion channel 12 passes through the second heat exchanger 22 through the fourth infusion channel 14; the first solenoid valve 31 is opened, so that the second infusion channel 12 can exchange heat with the first infusion channel 11 through the first heat exchanger 21; when the temperature detected by the second temperature sensor 42 is less than 45°C, and when the temperature detected by the third temperature sensor 43 is less than or equal to 40°C, after the first solenoid valve 31 is closed, the liquid in the first infusion channel 11 stops flowing; the second drain port is closed to stop the flow of liquid in the fourth infusion channel 14; all the liquid in the second infusion channel 12 is heat exchanged through the second heat exchanger 22, so as to enhance the heat exchange between the second infusion channel 12 and the third infusion channel 13.

[0049] For further information, see Figure 1 and Figure 2 As a specific embodiment of the circulating cooling system provided by the present invention, when the temperature detected by the second temperature sensor 42 is greater than or equal to 45°C, when the temperature detected by the second temperature sensor 42 is less than or equal to 60°C, and when the temperature detected by the third temperature sensor 43 is less than or equal to 40°C; the first drain port is opened, the second drain port is closed, and the first solenoid valve 31 is opened. In this way, the first solenoid valve 31 is opened, so that the second infusion channel 12 can exchange heat with the first infusion channel 11 through the first heat exchanger 21; a part of the heat of the second infusion channel 12 is transferred to the cleaning liquid in the third infusion channel 13 through the second heat exchanger 22, and another part of the heat of the second infusion channel 12 is transferred to the first infusion channel 11 through the first heat exchanger 21.

[0050] For further information, see Figure 1 and Figure 2 As a specific embodiment of the circulating cooling system provided by the present invention, a first pump body 51 is provided on the second infusion channel 12 upstream of the second temperature sensor 42, and a second pump body 52 is provided on the third infusion channel 13 downstream of the second heat exchanger 22. In this way, the first pump body 51 drives the liquid in the second infusion channel 12 to flow, and the first pump body 51 located upstream of the second temperature sensor 42 can reduce the influence of the first pump body 51 on the liquid temperature in the second infusion channel 12 after the second temperature sensor 42; the second pump body 52 drives the liquid in the third infusion channel 13 to flow, and the second pump body 52 located downstream of the second heat exchanger 22 can reduce the influence of the second pump body 52 on the liquid temperature in the third infusion channel 13.

[0051] For further information, see Figure 1 and Figure 2As a specific embodiment of the circulating cooling system provided by the present invention, a first filter 61 is provided on the first infusion channel 11, and / or a second filter 62 is provided on the second infusion channel 12. In this way, the first filter 61 can filter the liquid in the first infusion channel 11, and the second filter 62 can filter the liquid in the second infusion channel 12.

[0052] Specifically, in one embodiment, a third filter 63 is disposed on the third infusion channel 13 , so that the third filter 63 can filter the liquid in the third infusion channel 13 .

[0053] For further information, see Figure 1 and Figure 2 As a specific embodiment of the circulating cooling system provided by the present invention, the maximum power of the first heat exchanger 21 is 70kW; the maximum power of the second heat exchanger 22 is 5KW. In this way, the power of the second heat exchanger 22 is much smaller than that of the first heat exchanger 21, so as to avoid the second heat exchanger 22 exchanging heat too quickly and affecting the properties of the cleaning fluid in the third infusion channel 13; in addition, the second heat exchanger 22 is prevented from exchanging too much power (because the cleaning fluid is sometimes oil, and the power of a single second heat exchanger 22 is too large, which may easily cause the oil to heat up too quickly and cause a fire).

[0054] Specifically, Figure 3 In one embodiment, the first pump body 51 and the second pump body 52 are respectively connected to the power line through switches.

[0055] Specifically, Figure 4 In one embodiment, an analog input module (model: AJ65SBT-64AD) of Mitsubishi Corporation (Group) is used to implement the first temperature detection T1 (T1: temperature detection of the cleaning oil after passing through the second heat exchanger 22), the second temperature detection T2 (T2: temperature detection of the hydraulic oil before passing through the first heat exchanger 21), and the third temperature detection T3 (T3: temperature detection of the hydraulic oil after passing through the first heat exchanger 21).

[0056] Specifically, Figure 5 In one embodiment, a remote digital output module (model: AJ65SBTB2N-8R) of Mitsubishi Corporation (Group) is used. A1 is a start light for the cleaning pump (such as the second pump body 52), A2 is a start light for the air cushion pump (such as the first pump body), A3 is a cold water valve (such as the first solenoid valve 31), A4 is a cleaning oil inlet valve (such as the third solenoid valve 33), A5 is a switching valve (such as the second solenoid valve 32), A6 is a start for the cleaning pump (such as the second pump body 52), and A7 is a start for the air cushion pump (such as the first pump body).

[0057] Specifically, Figure 6In one embodiment, a remote digital input module (model: AJ65SBTB1-8D) of Mitsubishi Corporation (Group) is used. B1 is automatic control of the cleaning machine, B2 is manual control of the cleaning machine, B3 is start of the cleaning pump (for example: the second pump body 52), B4 is start of the air cushion pump (for example: the first pump body 51), B5 is stop of the cleaning pump (for example: the second pump body 52), B6 ​​is stop of the air cushion pump (for example: the first pump body 51), B7 is filter blockage (for example, the third filter 63), and B8 is filter blockage (for example, another third filter 63).

[0058] Specifically, Figure 7 In one embodiment, a remote analog output module (model: AJ65SBT-62DA) manufactured by Mitsubishi Corporation (Group) is used to control the flow control valve 35 .

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Circulating cooling system, characterized in that: include: A first infusion channel for cooling water, a second infusion channel for hydraulic oil, a third infusion channel for cleaning fluid, a first heat exchanger, and a second heat exchanger; the first infusion channel and the second infusion channel perform heat exchange through the first heat exchanger; the second infusion channel and the third infusion channel perform heat exchange through the second heat exchanger; Also includes a first solenoid valve, a second solenoid valve, and a fourth infusion channel; The first solenoid valve is arranged on the first infusion channel; The second solenoid valve is a two-position three-way solenoid valve; the second solenoid valve has a liquid inlet, a first liquid discharge port, and a second liquid discharge port; one end of the second liquid infusion channel is connected to the liquid inlet, and the other end of the second liquid infusion channel is connected to the first liquid discharge port; one end of the fourth liquid infusion channel is connected to the second liquid discharge port, and the other end of the fourth liquid infusion channel is connected to the second liquid infusion channel downstream of the second heat exchanger; There are multiple second heat exchangers, and the multiple second heat exchangers are arranged along the second infusion channel.

2. The circulating cooling system according to claim 1, characterized in that: A first temperature sensor is provided on the second infusion channel upstream of the first heat exchanger; a second temperature sensor is provided on the second infusion channel downstream of the intersection of the fourth infusion channel and the second infusion channel; and a third temperature sensor is provided on the third infusion channel.

3. The circulating cooling system according to claim 2, characterized in that: The third temperature sensor is located downstream of the second heat exchanger.

4. The circulating cooling system according to claim 2, characterized in that: When the temperature detected by the second temperature sensor is greater than 60° C., the first liquid discharge port is closed, the second liquid discharge port is opened, and the first solenoid valve is opened; When the temperature detected by the second temperature sensor is less than 45° C., and when the temperature detected by the third temperature sensor is less than or equal to 40° C., the first drain port is opened, the second drain port is closed, and the first solenoid valve is closed.

5. The circulating cooling system according to claim 4, characterized in that: When the temperature detected by the second temperature sensor is greater than or equal to 45°C, when the temperature detected by the second temperature sensor is less than or equal to 60°C, and when the temperature detected by the third temperature sensor is less than or equal to 40°C; the first drain port opens, the second drain port is closed, and the first solenoid valve opens.

6. The circulating cooling system according to claim 2, characterized in that: A first pump body is disposed on the second infusion channel upstream of the second temperature sensor, and a second pump body is disposed on the third infusion channel downstream of the second heat exchanger.

7. The circulating cooling system according to any one of claims 1 to 6, characterized in that: The first infusion channel is provided with a first filter, and / or the second infusion channel is provided with a second filter.

8. The circulating cooling system according to any one of claims 1 to 6, characterized in that: The maximum power of the first heat exchanger is 70 kW; the maximum power of the second heat exchanger is 5 kW.

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