Hydraulic oil temperature adjusting system

Abstract

The utility model discloses a hydraulic oil temperature adjusting system which comprises a hydraulic oil tank, a temperature sensor, a refrigerating loop, a heating loop, a mixing device and a controller, and the temperature sensor is arranged in the hydraulic oil tank and used for monitoring the temperature of hydraulic oil in the hydraulic oil tank. The refrigerating loop comprises a condenser, a cold water supply pipe, a cold water return pipe, an external cold source and a refrigerating electromagnetic valve which are sequentially communicated end to end, the condenser is arranged in the hydraulic oil tank, the refrigerating electromagnetic valve is arranged on the refrigerating loop, and the heating loop comprises a heater, a hot water supply pipe, a hot water return pipe, an external heat source and a heating electromagnetic valve which are sequentially communicated end to end. The heater is located in the hydraulic oil tank, the blending device is arranged in the hydraulic oil tank, the controller is electrically connected with the temperature sensor, the blending device, the refrigerating electromagnetic valve and the heating electromagnetic valve, and the controller controls the refrigerating loop or the heating loop to conduct cooling or heating adjustment on hydraulic oil in the hydraulic oil tank so as to adapt to more different working conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil tanks, in particular to a hydraulic oil temperature regulating system. Background Art

[0002] With the rapid development of the construction machinery industry, excavators, as important construction equipment, play an irreplaceable role in various engineering operations. The hydraulic system is one of the core components of the excavator, and the hydraulic oil tank is a key component in the hydraulic system. It is mainly used for storing hydraulic oil, oil flow exchange, and hydraulic oil filtration. However, construction machinery requiring hydraulic systems may need to operate in extreme environments. Low temperatures can cause the hydraulic oil to become too viscous, increasing pumping difficulty and reducing the efficiency of the hydraulic system. High temperatures can thin the hydraulic oil, potentially causing leaks, accelerate oil aging, and affect the stability and reliability of the hydraulic system. Existing hydraulic oil tanks often lack effective thermal management systems and are unable to effectively control oil temperature. Especially under long-term heavy-load operation, the oil temperature can easily rise, causing damage to hydraulic components due to overheating. Utility Model Content

[0003] In order to overcome at least one of the defects of the above-mentioned prior art, the present invention provides a hydraulic oil temperature regulation system, which can solve the problem that the hydraulic oil required by the hydraulic system is affected by the normal operation of the hydraulic system when the temperature is too high or too low.

[0004] The technical solution adopted by the present invention to solve the problem is:

[0005] A hydraulic oil temperature regulation system, comprising:

[0006] Hydraulic oil tank;

[0007] a temperature sensor, the temperature sensor being disposed in the hydraulic oil tank and being used to monitor the temperature of the hydraulic oil in the hydraulic oil tank;

[0008] A refrigeration circuit, comprising a condenser, a cold water supply pipe, a cold water return pipe, an external cold source, and a refrigeration solenoid valve. The condenser is disposed inside the hydraulic oil tank. The cold water supply pipe, the condenser, the cold water return pipe, and the external cold source are sequentially connected end to end to form a refrigeration circuit. The refrigeration solenoid valve is disposed on the refrigeration circuit.

[0009] a heating circuit comprising a heater, a hot water supply pipe, a hot water return pipe, an external heat source, and a heating solenoid valve; the heater being located inside the hydraulic oil tank; the hot water supply pipe, the heater, the hot water return pipe, and the external heat source being connected end to end to form a heating circuit; and the heating solenoid valve being disposed on the heating circuit;

[0010] A mixing device, the mixing device is arranged in the hydraulic oil tank;

[0011] A controller is electrically connected to the temperature sensor, the mixing device, the cooling solenoid valve, and the heating solenoid valve.

[0012] By adopting the above solution, a temperature sensor is installed in the hydraulic oil tank to monitor the temperature of the hydraulic oil in real time and feed the data back to the controller. When the hydraulic oil temperature in the refrigeration circuit is too high, the temperature sensor transmits this information to the controller, which activates the refrigeration circuit. The condenser is installed inside the hydraulic oil tank and absorbs the heat of the hydraulic oil through the circulation of cold water, thereby achieving a cooling effect. When the hydraulic oil temperature in the heating circuit is too low, the temperature sensor also transmits this information to the controller, which activates the heating circuit. The heater is installed in the hydraulic oil tank and circulates hot water to increase the temperature of the hydraulic oil and ensure its fluidity. A mixing device is installed in the hydraulic oil tank to ensure that the temperature of the hydraulic oil is evenly distributed throughout the tank, preventing local temperatures from being too high or too low, thereby ensuring the stability and reliability of the hydraulic system.

[0013] Furthermore, it also includes a heat exchange device, which has a first heat exchange tube and a second heat exchange tube. The hydraulic oil tank has an oil suction port and an oil return port. The oil suction port is connected to the first heat exchange tube through a pipeline, and the oil return port is connected to the second heat exchange tube through a pipeline. The first heat exchange tube and the second heat exchange tube are both arranged through the heat exchange device.

[0014] With this solution, the heat exchanger is installed on the pipes connecting the hydraulic oil tank's intake and return ports. This not only cools the hydraulic oil within the tank, but also cools the hydraulic oil as it flows in and out. The first and second heat exchange pipes run through the heat exchanger, ensuring effective cooling / heating of the hydraulic oil both in and out of the tank. By placing the cooling devices in key locations, such as inside the tank and along the pipes, the hydraulic oil temperature can be more efficiently regulated.

[0015] Furthermore, a cold water supply branch is provided between the cold water supply pipe and the heat exchange device for connecting the cold water supply pipe and the heat exchange device, a cold water return branch is provided between the cold water return pipe and the heat exchange device for connecting the cold water return pipe and the heat exchange device, and the refrigeration solenoid valve is provided between the cold water supply pipe and the external cold source.

[0016] By adopting this solution, cold water, flowing through the cold water supply and return branches, can more fully exchange heat with the hydraulic oil in the heat exchanger, thereby improving cooling efficiency. The cold water supply branch introduces cold water into the heat exchanger, while the cold water return branch drains water that has absorbed heat, ensuring smooth water flow and improving the continuity and efficiency of heat exchange. The cooling solenoid valve is located between the cold water supply pipe and the external cooling source. A single cooling solenoid valve can control the water flow in both the cold water supply pipe and the cold water supply branch, facilitating modification of existing piping and reducing points of failure.

[0017] Furthermore, a cold water supply branch is provided between the cold water supply pipe and the heat exchange device for connecting the cold water supply pipe and the heat exchange device, and a cold water return branch is provided between the cold water return pipe and the heat exchange device for connecting the cold water return pipe and the heat exchange device. The refrigeration solenoid valve includes a first refrigeration solenoid valve and a second refrigeration solenoid valve. The first refrigeration solenoid valve is provided on the side of the cold water supply pipe close to the condenser, and the second refrigeration solenoid valve is provided on the cold water supply branch. The first refrigeration solenoid valve and the second refrigeration solenoid valve are both electrically connected to the controller.

[0018] With this solution, the first cooling solenoid valve is located on the cold water supply pipe near the condenser, controlling the main circuit consisting of the cold water supply pipe and the cold water return pipe. When the temperature sensor detects that the hydraulic oil temperature is too high, the controller opens the first cooling solenoid valve to allow more cold water to enter the condenser, quickly lowering the hydraulic oil temperature.

[0019] The second cooling solenoid valve, located on the cold water supply branch, controls the branch consisting of the cold water supply branch and the cold water return branch. If the temperature sensor detects that the hydraulic oil temperature is still high, the controller opens the second cooling solenoid valve to increase the flow of additional cold water and further reduce the hydraulic oil temperature.

[0020] The first cooling solenoid valve and the second cooling solenoid valve can dynamically adjust the cold water flow according to the feedback of the temperature sensor to ensure that the hydraulic oil temperature always remains within the set range, thereby improving the accuracy and stability of temperature control.

[0021] Furthermore, the heat exchange device includes a box body and a first coiled pipe, the first coiled pipe is coiled in the box body in a bent state, the first coiled pipe is provided with a first interface and a second interface, the first interface is connected to the cold water supply branch pipe, and the second interface is connected to the cold water return branch pipe.

[0022] With this solution, the first port connects to the cold water supply branch, and the second port connects to the cold water return branch, forming a complete circuit. The first coiled pipe is coiled within the casing, increasing the contact area between the cold water and the hydraulic oil and improving heat exchange efficiency. This structure allows the cold water to more fully absorb the heat from the hydraulic oil, thereby reducing the hydraulic oil temperature more quickly.

[0023] Furthermore, a hot water supply branch pipe is provided between the hot water supply pipe and the heat exchange device for connecting the hot water supply pipe and the heat exchange device, a hot water return branch pipe is provided between the hot water return pipe and the heat exchange device for connecting the hot water return pipe and the heat exchange device, and the heating solenoid valve is provided between the hot water supply pipe and the external heat source.

[0024] By adopting this solution, hot water can more fully exchange heat with the hydraulic oil in the heat exchange device through the hot water supply branch and the hot water return branch, thereby improving cooling efficiency. The hot water supply branch introduces hot water into the heat exchange device, and the hot water return branch drains the water that has absorbed heat, ensuring smooth water flow and improving the continuity and efficiency of heat exchange. The heating solenoid valve is located between the hot water supply pipe and the external heat source. A single heating solenoid valve can control the water flow in both the hot water supply pipe and the hot water supply branch, facilitating the modification of existing pipelines and reducing the number of failure points.

[0025] Furthermore, a hot water supply branch is provided between the hot water supply pipe and the heat exchange device for connecting the hot water supply pipe and the heat exchange device, and a hot water return branch is provided between the hot water return pipe and the heat exchange device for connecting the hot water return pipe and the heat exchange device. The heating solenoid valve includes a first heating solenoid valve and a second heating solenoid valve. The first heating solenoid valve is provided on the side of the hot water supply pipe close to the heater, and the second heating solenoid valve is provided on the hot water supply branch. The first heating solenoid valve and the second heating solenoid valve are both electrically connected to the controller.

[0026] With this solution, the first heating solenoid valve is located on the hot water supply pipe near the condenser, controlling the main circuit consisting of the hot water supply and return pipes. If the temperature sensor detects that the hydraulic oil temperature is too high, the controller opens the first heating solenoid valve, allowing more hot water to enter the condenser and quickly lowering the hydraulic oil temperature.

[0027] The second heating solenoid valve, located on the hot water supply branch, controls the hot water supply and return branches. If the temperature sensor detects that the hydraulic oil temperature is still high, the controller opens the second heating solenoid valve to increase the flow of additional hot water and further reduce the hydraulic oil temperature.

[0028] The first heating solenoid valve and the second heating solenoid valve can dynamically adjust the hot water flow according to the feedback from the temperature sensor to ensure that the hydraulic oil temperature always remains within the set range, thereby improving the accuracy and stability of temperature control.

[0029] Furthermore, the heat exchange device includes a box body and a second coiled pipe, the second coiled pipe is coiled in the box body in a bent state, the second coiled pipe is provided with a third interface and a fourth interface, the third interface is connected to the hot water supply branch pipe, and the fourth interface is connected to the hot water return branch pipe.

[0030] With this solution, the third port connects to the hot water supply branch, and the fourth port connects to the hot water return branch, forming a complete circuit. The first coiled pipe is coiled within the tank, increasing the contact area between the hot water and the hydraulic oil and improving heat exchange efficiency. This structure allows the hot water to more fully absorb the heat from the hydraulic oil, thereby rapidly reducing the hydraulic oil temperature.

[0031] Furthermore, the mixing device is a paddle stirrer.

[0032] By adopting the above solution, the paddle stirrer stirs the hydraulic oil through rotating blades, so that the temperature distribution of the hydraulic oil in the entire hydraulic oil tank is more uniform, and the high temperature and low temperature stratification phenomenon in the hydraulic oil tank is prevented.

[0033] In summary, the hydraulic oil temperature regulation system provided by the present invention has the following technical effects:

[0034] The temperature sensor, installed in the hydraulic oil tank, monitors the hydraulic oil temperature in real time and feeds the data back to the controller. When the hydraulic oil temperature in the refrigeration circuit is too high, the temperature sensor transmits this information to the controller, which activates the refrigeration circuit. The condenser, installed inside the hydraulic oil tank, absorbs the heat from the hydraulic oil through a cold water circulation system, thereby achieving a cooling effect. When the hydraulic oil temperature in the heating circuit is too low, the temperature sensor also transmits this information to the controller, which activates the heating circuit. The heater, installed inside the hydraulic oil tank, circulates hot water to raise the hydraulic oil temperature and ensure fluidity. A mixing device, installed in the hydraulic oil tank, ensures that the hydraulic oil temperature is evenly distributed throughout the tank, preventing local temperatures from being too high or too low, thereby ensuring the stability and reliability of the hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a connection diagram of the utility model;

[0036] Figure 2 This is a schematic diagram of the connection relationship of the heat exchange device state of the first setting of the utility model;

[0037] Figure 3 This is a schematic diagram of the connection relationship of the heat exchange device state of the second setting of the utility model;

[0038] Figure 4 This is a schematic structural diagram of the heat exchange device of the present utility model.

[0039] Among them, the meanings of the figure marks are as follows: 1. hydraulic oil tank; 2. temperature sensor; 31. condenser; 32. cold water supply pipe; 33. cold water return pipe; 34. refrigeration solenoid valve; 341. first refrigeration solenoid valve; 342. second refrigeration solenoid valve; 35. cold water supply branch; 36. cold water return branch; 41. heater; 42. hot water supply pipe; 43. hot water return pipe; 44. heating solenoid valve; 441. first heating solenoid valve; 442. second heating solenoid valve; 45. hot water supply branch; 46. hot water return branch; 5. hot and cold water exchanger; 6. mixing device; 7. controller; 8. heat exchange device; 81. first heat exchange tube; 82. second heat exchange tube; 83. first coiled tube; 831. first interface; 832. second interface; 84. second coiled tube; 841. third interface; 842. fourth interface. DETAILED DESCRIPTION

[0040] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described and discussed below in conjunction with the drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all the examples. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] In order to facilitate the understanding of the embodiments of the present invention, the following will be further explained with reference to specific embodiments as examples in conjunction with the drawings, and each embodiment does not constitute a limitation on the embodiments of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They 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 direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0044] See Figure 1 The present invention discloses a hydraulic oil temperature regulation system, comprising a hydraulic oil tank 1, a temperature sensor 2, a refrigeration circuit, a heating circuit, a mixing device 6, and a controller 7. The temperature sensor 2 is disposed within the hydraulic oil tank 1 and is used to monitor the temperature of the hydraulic oil within the hydraulic oil tank 1. The refrigeration circuit comprises a condenser 31, a cold water supply pipe 32, a cold water return pipe 33, an external cold source, and a refrigeration solenoid valve 34. The condenser 31 is disposed within the hydraulic oil tank 1. The cold water supply pipe 32, the condenser 31, the cold water return pipe 33, and the external cold source are interconnected end-to-end to form a refrigeration circuit. The refrigeration solenoid valve 34 is disposed within the refrigeration circuit. The heating circuit comprises a heater 41, a hot water supply pipe 42, a hot water return pipe 43, an external heat source, and a heating solenoid valve 44. The heater 41 is disposed within the hydraulic oil tank 1. The hot water supply pipe 42, the heater 41, the hot water return pipe 43, and the external heat source are interconnected end-to-end to form a heating circuit. The heating solenoid valve 44 is disposed within the heating circuit. The mixing device 6 is provided in the hydraulic oil tank 1. The controller 7 is electrically connected to the temperature sensor 2, the mixing device 6, the cooling solenoid valve 34 and the heating solenoid valve 44 respectively.

[0045] Specifically, the temperature sensor 2 is provided in the hydraulic oil tank 1 and is used to monitor the temperature of the hydraulic oil in the hydraulic oil tank 1 and transmit the temperature information to the controller 7. The refrigeration circuit includes a condenser 31, a cold water supply pipe 32, a cold water return pipe 33, an external cold source and a refrigeration solenoid valve 34. The condenser 31 is provided inside the hydraulic oil tank 1 and is used to contact the hydraulic oil in the hydraulic oil tank 1 to reduce the temperature. The cold water supply pipe 32, the condenser 31, the cold water return pipe 33 and the external cold source are connected end to end in sequence to form a refrigeration circuit. The refrigeration solenoid valve 34 can be provided at any node on the refrigeration circuit to control the on / off of the entire refrigeration circuit without interfering with the normal operation of other components in the refrigeration circuit. The heating circuit includes a heater 41, a hot water supply pipe 42, a hot water return pipe 43, an external heat source, and a heating solenoid valve 44. The heater 41 is located inside the hydraulic oil tank 1 and is used to contact and heat the hydraulic oil in the hydraulic oil tank 1. The hot water supply pipe 42, the heater 41, the hot water return pipe 43, and the external heat source are connected end to end to form a heating circuit. The heating solenoid valve 44 can be set at any node on the heating circuit to control the on and off of the entire heating circuit without interfering with the normal operation of other components on the heating circuit. The mixing device 6 is set in the hydraulic oil tank 1 to accelerate the mixing of the hydraulic oil in the hydraulic oil tank 1. The controller 7 is electrically connected to the temperature sensor 2, the mixing device 6, the cooling solenoid valve 34, and the heating solenoid valve 44.

[0046] The working principle of the above structure is:

[0047] When the temperature sensor 2 detects that the hydraulic oil needs to be cooled, the controller 7 controls the refrigeration solenoid valve 34 to open, and cold water flows from the external cold source through the cold water supply pipe 32 into the condenser 31. The condenser 31 accelerates the heat exchange between the hydraulic oil and the cold water, so that the condenser 31 accelerates the transfer of heat carried by the hydraulic oil to the cold water, thereby completing the cooling of the hydraulic oil. The cold water that has undergone heat exchange flows back to the external cold source through the cold water return pipe 33 for cooling, and then performs subsequent cyclic cooling. When the condenser 31 cools the hydraulic oil, the mixing device 6 can be turned on to quickly mix the cooled hydraulic oil with the uncooled hydraulic oil in the hydraulic oil tank 1, thereby ensuring the uniform temperature of the hydraulic oil in the hydraulic oil tank 1. The external cold source can be selected as a vehicle air conditioner, so that there is no need to set up other cold sources. A hot and cold water exchanger 5 can also be used.

[0048] When the temperature sensor 2 detects that the hydraulic oil needs to be heated, the controller 7 controls the heating solenoid valve 44 to open, and hot water flows from the external heat source into the heater 41 through the hot water supply pipe 42. The heater 41 accelerates the heat exchange between the hydraulic oil and the hot water, thereby transferring the heat carried by the hot water to the hydraulic oil through the heater 41, thereby completing the heating of the hydraulic oil. The hot water that has undergone heat exchange flows back to the external heat source through the hot water return pipe 43 to replenish heat for subsequent cyclic heating. While the heater 41 is heating the hydraulic oil, the mixing device 6 can be turned on to quickly mix the heated hydraulic oil with the unheated hydraulic oil in the hydraulic oil tank 1, ensuring a uniform temperature of the hydraulic oil in the hydraulic oil tank 1. The external heat source can be selected as the vehicle air conditioner, so that no additional heat source is required. A hot and cold water exchanger 5 can also be used.

[0049] See Figure 2 As shown, in some embodiments, the hydraulic oil temperature regulation system also includes a heat exchange device 8, the heat exchange device 8 has a first heat exchange tube 81 and a second heat exchange tube 82, the hydraulic oil tank 1 has an oil suction port and an oil return port, the oil suction port is connected to the first heat exchange tube 81 through a pipeline, and the oil return port is connected to the second heat exchange tube 82 through a pipeline, and the first heat exchange tube 81 and the second heat exchange tube 82 are both arranged through the heat exchange device 8.

[0050] Specifically, the hydraulic oil temperature regulation system also includes a heat exchange device 8, which includes a first heat exchange tube 81 and a second heat exchange tube 82. The first heat exchange tube 81 and the second heat exchange tube 82 are both arranged to penetrate the heat exchange device 8 so that the hydraulic oil is heated or cooled during its flow through the first heat exchange tube 81 and the second heat exchange tube 82. The hydraulic oil tank 1 has an oil suction port and an oil return port. The oil suction port is connected to the first heat exchange tube 81 through a pipeline, and the oil return port is connected to the second heat exchange tube 82 through a pipeline, thereby guiding the hydraulic oil to flow through the first heat exchange tube 81 and the second heat exchange tube 82 to achieve the effect of more efficiently regulating the hydraulic oil temperature. The heat exchange device 8 can be connected to an external heat source and a cold source to accelerate heat exchange.

[0051] See Figure 2 As shown, in some embodiments, a cold water supply branch pipe 35 is provided between the cold water supply pipe 32 and the heat exchange device 8 for connecting the cold water supply pipe 32 and the heat exchange device 8, a cold water return branch pipe 36 is provided between the cold water return pipe 33 and the heat exchange device 8 for connecting the cold water return pipe 33 and the heat exchange device 8, and a refrigeration solenoid valve 34 is provided between the cold water supply pipe 32 and the external cold source.

[0052] Specifically, a cold water supply branch pipe 35 is provided between the cold water supply pipe 32 and the heat exchanger 8 for connecting the cold water supply pipe 32 and the heat exchanger 8. A cold water return branch pipe 36 is provided between the cold water return pipe 33 and the heat exchanger 8 for connecting the cold water return pipe 33 and the heat exchanger 8. This constitutes a circuit that originates from an external cold source and passes through the cold water supply pipe 32, the cold water supply branch pipe 35, the heat exchanger 8, the cold water return branch pipe 36, and the cold water return pipe 33, returning to the external cold source. This circuit cools the hydraulic oil in the first heat exchange pipe 81 and the second heat exchange pipe 82 provided in the heat exchanger 8. A cooling solenoid valve 34 is provided between the cold water supply pipe 32 and the external cold source, i.e., in the unbranched section of the cold water supply pipe 32. This allows control of both circuits via a single cooling solenoid valve 34, facilitating modification of existing pipelines and reducing points of failure.

[0053] See Figure 3 As shown, based on the above structure, the cooling solenoid valve 34 can also be configured in other ways. Specifically, the cooling solenoid valve 34 includes a first cooling solenoid valve 341 and a second cooling solenoid valve 342. The first cooling solenoid valve 341 is located on the side of the cold water supply pipe 32 near the condenser 31, and the second cooling solenoid valve 342 is located on the cold water supply branch pipe 35. Both the first cooling solenoid valve 341 and the second cooling solenoid valve 342 are electrically connected to the controller 7. Specifically, the first cooling solenoid valve 341 is located on the side of the cold water supply pipe 32 near the condenser 31, controlling the main circuit consisting of the cold water supply pipe 32 and the cold water return pipe 33. When the temperature sensor 2 detects that the hydraulic oil temperature is too high, the controller 7 can open the first cooling solenoid valve 341 to allow more cold water to enter the condenser 31, quickly reducing the hydraulic oil temperature. The second cooling solenoid valve 342 is located on the cold water supply branch pipe 35, controlling the branch circuit consisting of the cold water supply branch pipe 35 and the cold water return branch pipe 36. If temperature sensor 2 detects that the hydraulic oil temperature is still high, controller 7 can open second cooling solenoid valve 342 to increase the flow of additional cold water, further lowering the hydraulic oil temperature. First cooling solenoid valve 341 and second cooling solenoid valve 342 can dynamically adjust the flow of cold water based on feedback from temperature sensor 2, ensuring that the hydraulic oil temperature remains within the set range, improving the accuracy and stability of temperature control.

[0054] See Figure 3 and Figure 4 As shown, based on the above structure, the heat exchange device 8 includes a box body and a first coiled tube 83. The first coiled tube 83 is coiled in the box body in a bent state. The first coiled tube 83 is provided with a first interface 831 and a second interface 832. The first interface 831 is connected to the cold water supply branch 35, and the second interface 832 is connected to the cold water return branch 36.

[0055] Specifically, first port 831 connects to the cold water supply branch 35, and second port 832 connects to the cold water return branch 36, forming a complete circuit. First coiled tube 83 is coiled within the housing in a curved shape, increasing the contact area between the cold water and the hydraulic oil and improving heat exchange efficiency. This structure allows the cold water to more fully absorb the heat from the hydraulic oil, thereby rapidly reducing the hydraulic oil's temperature.

[0056] See Figure 2 As shown, in other embodiments, a hot water supply branch pipe 45 is provided between the hot water supply pipe 42 and the heat exchange device 8 for connecting the hot water supply pipe 42 and the heat exchange device 8, a hot water return branch pipe 46 is provided between the hot water return pipe 43 and the heat exchange device 8 for connecting the hot water return pipe 43 and the heat exchange device 8, and a heating solenoid valve 44 is provided between the hot water supply pipe 42 and the external heat source.

[0057] Specifically, a hot water supply branch pipe 45 is provided between the hot water supply pipe 42 and the heat exchanger 8 for connecting the two. A hot water return branch pipe 46 is provided between the hot water return pipe 43 and the heat exchanger 8 for connecting the hot water return pipe 43 and the heat exchanger 8. This constitutes a circuit that originates from the external heat source and passes through the hot water supply pipe 42, the hot water supply branch pipe 45, the heat exchanger 8, the hot water return branch pipe 46, and the hot water return pipe 43, returning to the external heat source. This circuit cools the hydraulic oil in the first heat exchange pipe 81 and the second heat exchange pipe 82 provided in the heat exchanger 8. A heating solenoid valve 44 is provided between the hot water supply pipe 42 and the external heat source, i.e., in an unbranched section of the hot water supply pipe 42. This allows a single heating solenoid valve 44 to control both circuits, facilitating modification of existing pipelines and reducing points of failure.

[0058] See Figure 3As shown, based on the above structure, the heating solenoid valve 44 can also be configured in other ways. Specifically, the heating solenoid valve 44 includes a first heating solenoid valve 441 and a second heating solenoid valve 442. The first heating solenoid valve 441 is located on the side of the hot water supply pipe 42 near the heater 41, and the second heating solenoid valve 442 is located on the hot water supply branch pipe 45. Both the first heating solenoid valve 441 and the second heating solenoid valve 442 are electrically connected to the controller 7. The first heating solenoid valve 441 is located on the side of the hot water supply pipe 42 near the condenser, controlling the main circuit consisting of the hot water supply pipe 42 and the hot water return pipe 43. When the temperature sensor 2 detects that the hydraulic oil temperature is too high, the controller 7 opens the first heating solenoid valve 441 to allow more hot water to enter the condenser, quickly reducing the hydraulic oil temperature. The second heating solenoid valve 442 is located on the hot water supply branch pipe 45, controlling the branch circuit consisting of the hot water supply branch pipe 45 and the hot water return branch pipe 46. If temperature sensor 2 detects that the hydraulic oil temperature is still high, controller 7 can open second heating solenoid valve 442 to increase the flow of additional hot water and further reduce the hydraulic oil temperature. First heating solenoid valve 441 and second heating solenoid valve 442 can dynamically adjust the flow of hot water based on feedback from temperature sensor 2 to ensure that the hydraulic oil temperature remains within the set range, improving the accuracy and stability of temperature control.

[0059] See Figure 4 As shown, based on the above structure, the heat exchange device 8 includes a box body and a second coiled pipe 84. The second coiled pipe 84 is coiled in the box body in a bent state. The second coiled pipe 84 is provided with a third interface 841 and a fourth interface 842. The third interface 841 is connected to the hot water supply branch pipe 45, and the fourth interface 842 is connected to the hot water return branch pipe 46.

[0060] Specifically, third port 841 communicates with the hot water supply branch 45, and fourth port 842 communicates with the hot water return branch 46, forming a complete circuit. Second coiled tube 84 is coiled within the housing in a curved shape, increasing the contact area between the hot water and the hydraulic oil and improving heat exchange efficiency. This structure allows the hot water to more fully absorb the heat from the hydraulic oil, thereby rapidly reducing the hydraulic oil's temperature.

[0061] Of course, the cold water supply branch pipe 35, the cold water return branch pipe 36, the hot water supply branch pipe 45 and the hot water return branch pipe 46 can also be provided at the same time, so that the heat exchange device 8 can have the functions of heating and cooling at the same time.

[0062] In this embodiment, the mixing device 6 is a paddle stirrer, which stirs the hydraulic oil through rotating blades to make the temperature distribution of the hydraulic oil in the entire hydraulic oil tank 1 more uniform, thereby preventing high temperature and low temperature stratification from occurring in the hydraulic oil tank 1.

[0063] It should also be noted that the cooling solenoid valve 34, the first cooling solenoid valve 341, and the second cooling solenoid valve 342 are all solenoid valves in the cooling circuit and do not inherently have a cooling function. The heating solenoid valve 44, the first heating solenoid valve 441, and the second heating solenoid valve 442 are all solenoid valves in the heating circuit and do not inherently have a heating function. Furthermore, to facilitate the display of the structure, the first coiled tube 83 and the second coiled tube 84 in the heat exchanger 8 are partially exposed outside the housing. Under normal circumstances, the first coiled tube 83 and the second coiled tube 84 are optimally located entirely within the housing. Furthermore, to facilitate the display of the heat exchanger 8, a cubic structure is employed. During normal design and installation, the external shape can be adapted to meet specific requirements and the available space for the engineering equipment. Common shapes, such as L-shaped or N-shaped, can be used to ensure that the first coiled tube 83 and the second coiled tube 84 can effectively exchange heat with the first heat exchange tube 81 and the second heat exchange tube 82, while also ensuring that the heat exchanger 8 can be installed within a limited space.

[0064] The technical means disclosed in the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A hydraulic oil temperature control system, characterized in that: include: Hydraulic oil tank (1); a temperature sensor (2), the temperature sensor (2) being arranged in the hydraulic oil tank (1) and being used for monitoring the temperature of the hydraulic oil in the hydraulic oil tank (1); A refrigeration circuit, the refrigeration circuit comprising a condenser (31), a cold water supply pipe (32), a cold water return pipe (33), an external cold source and a refrigeration solenoid valve (34); the condenser (31) is arranged inside the hydraulic oil tank (1); the cold water supply pipe (32), the condenser (31), the cold water return pipe (33) and the external cold source are connected end to end in sequence to form a refrigeration circuit; the refrigeration solenoid valve (34) is arranged on the refrigeration circuit; A heating circuit, the heating circuit comprising a heater (41), a hot water supply pipe (42), a hot water return pipe (43), an external heat source and a heating solenoid valve (44); the heater (41) is located inside the hydraulic oil tank (1); the hot water supply pipe (42), the heater (41), the hot water return pipe (43) and the external heat source are connected end to end in sequence to form a heating circuit; the heating solenoid valve (44) is provided on the heating circuit; A mixing device (6), the mixing device (6) being arranged in the hydraulic oil tank (1); A controller (7), wherein the controller (7) is electrically connected to the temperature sensor (2), the mixing device (6), the cooling solenoid valve (34) and the heating solenoid valve (44).

2. A hydraulic oil temperature control system according to claim 1, characterized in that: The invention also includes a heat exchange device (8), wherein the heat exchange device (8) has a first heat exchange tube (81) and a second heat exchange tube (82); the hydraulic oil tank (1) has an oil suction port and an oil return port; the oil suction port is connected to the first heat exchange tube (81) through a pipeline; the oil return port is connected to the second heat exchange tube (82) through a pipeline; the first heat exchange tube (81) and the second heat exchange tube (82) are both arranged to pass through the heat exchange device (8).

3. A hydraulic oil temperature control system according to claim 2, characterized in that: A cold water supply branch pipe (35) is provided between the cold water supply pipe (32) and the heat exchange device (8) for connecting the cold water supply pipe (32) and the heat exchange device (8); a cold water return branch pipe (36) is provided between the cold water return pipe (33) and the heat exchange device (8) for connecting the cold water return pipe (33) and the heat exchange device (8); and the refrigeration solenoid valve (34) is provided between the cold water supply pipe (32) and the external cold source.

4. A hydraulic oil temperature control system according to claim 2, characterized in that: A cold water supply branch pipe (35) is provided between the cold water supply pipe (32) and the heat exchange device (8) for connecting the cold water supply pipe (32) and the heat exchange device (8); a cold water return branch pipe (36) is provided between the cold water return pipe (33) and the heat exchange device (8) for connecting the cold water return pipe (33) and the heat exchange device (8); the refrigeration solenoid valve (34) includes a first refrigeration solenoid valve (341) and a second refrigeration solenoid valve (342); the first refrigeration solenoid valve (341) is provided on a side of the cold water supply pipe (32) close to the condenser (31); the second refrigeration solenoid valve (342) is provided on the cold water supply branch pipe (35); the first refrigeration solenoid valve (341) and the second refrigeration solenoid valve (342) are both electrically connected to the controller (7).

5. A hydraulic oil temperature control system according to claim 4, characterized in that: The heat exchange device (8) comprises a box body and a first coiled pipe (83), wherein the first coiled pipe (83) is coiled in the box body in a bent state, and the first coiled pipe (83) is provided with a first interface (831) and a second interface (832), wherein the first interface (831) is connected to the cold water supply branch pipe (35), and the second interface (832) is connected to the cold water return branch pipe (36).

6. A hydraulic oil temperature control system according to claim 2, characterized in that: A hot water supply branch pipe (45) is provided between the hot water supply pipe (42) and the heat exchange device (8) for connecting the hot water supply pipe (42) and the heat exchange device (8); a hot water return branch pipe (46) is provided between the hot water return pipe (43) and the heat exchange device (8) for connecting the hot water return pipe (43) and the heat exchange device (8); and the heating solenoid valve (44) is provided between the hot water supply pipe (42) and the external heat source.

7. The hydraulic oil temperature regulating system according to claim 2, characterized in that: A hot water supply branch pipe (45) is provided between the hot water supply pipe (42) and the heat exchange device (8) for connecting the hot water supply pipe (42) and the heat exchange device (8); a hot water return branch pipe (46) is provided between the hot water return pipe (43) and the heat exchange device (8) for connecting the hot water return pipe (43) and the heat exchange device (8); the heating solenoid valve (44) includes a first heating solenoid valve (441) and a second heating solenoid valve (442); the first heating solenoid valve (441) is provided on a side of the hot water supply pipe (42) close to the heater (41); the second heating solenoid valve (442) is provided on the hot water supply branch pipe (45); the first heating solenoid valve (441) and the second heating solenoid valve (442) are both electrically connected to the controller (7).

8. The hydraulic oil temperature regulating system according to claim 6, characterized in that: The heat exchange device (8) comprises a box body and a second coiled pipe (84), the second coiled pipe (84) being coiled in the box body in a bent state, the second coiled pipe (84) being provided with a third interface (841) and a fourth interface (842), the third interface (841) being in communication with the hot water supply branch pipe (45), and the fourth interface (842) being in communication with the hot water return branch pipe (46).

9. The hydraulic oil temperature control system according to claim 1, characterized in that: The mixing device (6) is a paddle stirrer.

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