Oxygen production system with heat recovery function and control method

Abstract

The present invention discloses an oxygen production system and control method with a heat recovery function. The insulating liquid in the insulating liquid tank directly absorbs the heat on the surface of the air compressor head, which has higher heat dissipation efficiency than ordinary air cooling and water cooling methods. The first water pump drives the insulating liquid to circulate in the first liquid circuit, and the second water pump drives the cooling water to circulate in the second liquid circuit. The cooling water and the insulating liquid exchange heat in the first water-cooled heat exchanger. After the heat exchange, the insulating liquid flows back to the insulating liquid tank, and the cooling water flows back to the water tank after the heat exchange. The water tank stores the cooling water that has absorbed the heat and supplies water to the outside, realizing heat recovery and making full use of energy. The temperature sensor detects the temperature of the cooling water in the water tank. When the temperature of the cooling water is too high, the control module controls the third water pump to work, and the cooling water in the water tank enters the third liquid circuit for circulation. The air-cooled heat exchanger dissipates heat from the cooling water, which can adjust the temperature of the cooling water in the water tank and avoid overheating of the water supply.

Description

Technical Field

[0001] The present invention relates to the technical field of oxygen production, and in particular to an oxygen production system with a heat recovery function and a control method. Background Art

[0002] Home oxygen therapy refers to a treatment method that uses oxygen inhalation at home to treat chronic diseases or improve sub-health symptoms. Home oxygen therapy typically uses a pressure swing adsorption (PSA) oxygen concentrator (PSA) to provide oxygen, which is economical and convenient. PSA oxygen concentrators often use oil-free scroll air compressors. As the compressor operates, the temperature of the compressor head rises, accelerating the evaporation of grease from the bearings, causing poor operation of the rotor and stator discs, which in turn reduces the compressor's service life. Therefore, heat dissipation from the compressor is necessary.

[0003] Existing pressure swing adsorption oxygen concentrators typically use air cooling to dissipate heat from the air compressor. However, this method is inefficient and the heat generated by the air compressor is not effectively utilized, resulting in significant energy waste. One existing technology involves installing water-cooling pipes on the surface of the air compressor. The cooling water within the pipes absorbs the heat generated by the air compressor and is then stored in a water tank for user use. However, this technology has low heat dissipation efficiency and cannot regulate the temperature of the cooling water in the water tank, potentially leading to overheating of the water supply. Summary of the Invention

[0004] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, the present invention provides an oxygen production system and control method with heat recovery functionality, which can address the problems of low heat dissipation efficiency, inability to perform heat recovery, and overheated water supply in existing oxygen production systems.

[0005] According to an embodiment of the first aspect of the present invention, an oxygen production system with a heat recovery function includes: an air compressor head; an insulating liquid tank, wherein the air compressor head is arranged in the insulating liquid tank, and the insulating liquid tank is filled with insulating liquid for absorbing heat from the air compressor head; a first liquid circuit, a first water-cooled heat exchanger and a first water pump, wherein the insulating liquid tank is connected to the first water-cooled heat exchanger through the first liquid circuit, and the first water pump is installed on the first liquid circuit to drive the insulating liquid to circulate in the first liquid circuit for heat dissipation; a control module, wherein the output end of the control module is electrically connected to the control end of the first water pump; a water tank, a second liquid circuit and a second water pump, wherein the water tank is connected to the first water-cooled heat exchanger through the second liquid circuit, and the second water pump is installed on the second liquid circuit for driving The cooling water in the water tank circulates in the second liquid circuit and exchanges heat with the insulating liquid. The water tank is provided with a water outlet for external water supply, and the output end of the control module is electrically connected to the control end of the second water pump; a third liquid circuit, an air-cooled heat exchanger and a third water pump, the water tank is connected to the air-cooled heat exchanger through the third liquid circuit, and the third water pump is installed on the third liquid circuit to drive the cooling water to circulate in the third liquid circuit to dissipate heat, the output end of the control module is electrically connected to the control end of the third water pump, and the output end of the control module is electrically connected to the control end of the air-cooled heat exchanger; a temperature sensor, the temperature sensor is used to detect the temperature of the cooling water in the water tank, and the output end of the temperature sensor is electrically connected to the input end of the control module.

[0006] The oxygen production system with heat recovery function according to the first embodiment of the present invention has at least the following beneficial effects:

[0007] The insulating liquid in the insulating liquid tank directly absorbs the heat from the surface of the air compressor head. Since the insulating liquid can directly contact the surface of the air compressor head, there is no need to set a water-cooling pipe on the surface of the air compressor. The air compressor head can be directly cooled. Compared with ordinary air cooling and water cooling methods, the heat dissipation efficiency is higher. The first water pump drives the insulating liquid to circulate in the first liquid path, and the second water pump drives the cooling water to circulate in the second liquid path. The cooling water and the insulating liquid exchange heat in the first water-cooled heat exchanger. After the heat exchange, the insulating liquid returns to the insulating liquid tank. After the heat exchange, the cooling water returns to the water tank. The water tank stores the cooling water that has absorbed the heat and supplies water to the outside, realizing heat recovery and making full use of energy. The temperature sensor detects the temperature of the cooling water in the water tank. When the temperature of the cooling water is too high, the control module controls the third water pump to operate, and the cooling water in the water tank enters the third liquid path for circulation. The air-cooled heat exchanger dissipates heat from the cooling water, which can adjust the temperature of the cooling water in the water tank to avoid overheating of the water supply.

[0008] According to some embodiments of the present invention, a second water-cooled heat exchanger and a hot gas pipeline are further included. The exhaust port of the air compressor head is connected to the second water-cooled heat exchanger through the hot gas pipeline, and the water tank is connected to the second water-cooled heat exchanger through the second liquid path.

[0009] According to some embodiments of the present invention, a water cooling pipe is provided in the air compressor head, and the water tank is connected to the water cooling pipe through the second liquid path.

[0010] According to some embodiments of the present invention, a first oil filling nozzle is provided on the insulating liquid tank, and a second oil filling nozzle is provided on the air compressor head, and the first oil filling nozzle is connected to the second oil filling nozzle.

[0011] According to some embodiments of the present invention, a water purifier is provided on the second liquid path.

[0012] According to some embodiments of the present invention, a water supply pipe is installed on the water tank, and the water supply pipe is used to connect to the tap water supply system. A first solenoid valve is provided on the water supply pipe, and the output end of the control module is electrically connected to the control end of the first solenoid valve.

[0013] According to some embodiments of the present invention, a liquid level meter is further included, wherein the liquid level meter is used to detect the liquid level in the water tank, and the output end of the liquid level meter is electrically connected to the input end of the control module.

[0014] According to some embodiments of the present invention, an opening is provided on the insulating liquid tank, an air filter device is provided on the opening, and the opening is connected to the air inlet of the air compressor head.

[0015] According to some embodiments of the present invention, a water supply pipe is installed on the water outlet, a second solenoid valve is provided on the water supply pipe, and the output end of the control module is electrically connected to the control end of the second solenoid valve.

[0016] A control method according to an embodiment of the second aspect of the present invention is applied to the above-mentioned oxygen production system with heat recovery function, including: a control module controlling the operation of the first water pump; a control module controlling the operation of the second water pump; a temperature sensor detecting the temperature of the cooling water in the water tank and feeding back the temperature data to the control module; the control module determining whether the temperature of the cooling water in the water tank is greater than a preset temperature value based on the temperature data; if the temperature of the cooling water is greater than the preset temperature value, the control module controlling the operation of the third water pump and the air-cooled heat exchanger.

[0017] The control method according to the second embodiment of the present invention has at least the following beneficial effects:

[0018] The insulating liquid in the insulating liquid tank directly absorbs the heat from the surface of the air compressor head. Since the insulating liquid can directly contact the surface of the air compressor head, there is no need to set a water-cooling pipe on the surface of the air compressor. The air compressor head can be directly cooled. Compared with ordinary air cooling and water cooling methods, the heat dissipation efficiency is higher. The first water pump drives the insulating liquid to circulate in the first liquid path, and the second water pump drives the cooling water to circulate in the second liquid path. The cooling water and the insulating liquid exchange heat in the first water-cooled heat exchanger. After the heat exchange, the insulating liquid returns to the insulating liquid tank. After the heat exchange, the cooling water returns to the water tank. The water tank stores the cooling water that has absorbed the heat and supplies water to the outside, realizing heat recovery and making full use of energy. The temperature sensor detects the temperature of the cooling water in the water tank. When the temperature of the cooling water is too high, the control module controls the third water pump to operate, and the cooling water in the water tank enters the third liquid path for circulation. The air-cooled heat exchanger dissipates heat from the cooling water, which can adjust the temperature of the cooling water in the water tank to avoid overheating of the water supply.

[0019] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0021] Figure 1 Schematic diagram of the structure of the oxygen production system with heat recovery function of the present invention;

[0022] Figure 2 This is a functional block diagram of the oxygen production system with heat recovery function of the present invention;

[0023] Figure 3 1 is a step diagram of the control method of the present invention.

[0024] Reference numerals:

[0025] Air compressor head 100, water cooling pipe 110,

[0026] Insulating liquid tank 200, first oil filling nozzle 210, second oil filling nozzle 220, hose 230, air filter device 240,

[0027] The first liquid circuit 300, the first water-cooled heat exchanger 310, the first water pump 320,

[0028] Control module 400,

[0029] Water tank 500, water supply pipe 510, first solenoid valve 520, water supply pipe 530, second solenoid valve 540,

[0030] Second liquid path 600, second water pump 610, water purifier 620

[0031] The third liquid circuit 700, the air-cooled heat exchanger 710, the third water pump 720,

[0032] Temperature sensor 800, liquid level gauge 810,

[0033] Hot gas pipeline 900 and second water-cooled heat exchanger 910 . DETAILED DESCRIPTION

[0034] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0035] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying 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 a limitation on the present invention.

[0036] In the description of the present invention, "a plurality" refers to more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0037] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0038] like Figures 1 to 2As shown, the oxygen production system with heat recovery function according to the first embodiment of the present invention includes: an air compressor head 100, an insulating liquid tank 200, a first liquid circuit 300, a first water-cooled heat exchanger 310, a first water pump 320, a control module 400, a water tank 500, a second liquid circuit 600, a second water pump 610, an air-cooled heat exchanger 710, a third liquid circuit 700, a third water pump 720 and a temperature sensor 800. The air compressor head 100 is arranged in the insulating liquid tank 200, and the insulating liquid tank 200 is filled with insulating liquid for absorbing heat from the air compressor head 100. The insulating liquid tank 200 is connected to the first water-cooled heat exchanger 310 through the first liquid circuit 300. The first water pump 320 is installed on the first liquid circuit 300 to drive the insulating liquid to circulate in the first liquid circuit 300 for heat dissipation. The output end of the control module 400 is electrically connected to the control end of the first water pump 320. The water tank 500 is connected to the first liquid circuit 300. The first water-cooled heat exchanger 310 is connected through the second liquid path 600. The second water pump 610 is installed on the second liquid path 600 to drive the cooling water in the water tank 500 to circulate in the second liquid path 600 and exchange heat with the insulating liquid. The water tank 500 is provided with a water outlet for external water supply. The output end of the control module 400 is electrically connected to the control end of the second water pump 610. The water tank 500 is connected to the air-cooled heat exchanger 710 through the third liquid path 700. The third water pump 720 is installed on the third liquid path 700 to drive the cooling water to circulate in the third liquid path 700 to dissipate heat. The output end of the control module 400 is electrically connected to the control end of the third water pump 720. The output end of the control module 400 is electrically connected to the control end of the air-cooled heat exchanger 710. The temperature sensor 800 is used to detect the temperature of the cooling water in the water tank 500. The output end of the temperature sensor 800 is electrically connected to the input end of the control module 400.

[0039] The insulating liquid in the insulating liquid tank 200 absorbs heat from the surface of the air compressor head 100. Since the insulating liquid can directly contact the surface of the air compressor head 100, there is no need to set a water cooling pipe on the surface of the air compressor. The air compressor head 100 is directly cooled. Compared with ordinary air cooling and water cooling methods, the heat dissipation efficiency is higher. The first water pump 320 drives the insulating liquid to circulate in the first liquid path 300, and the second water pump 610 drives the cooling water to circulate in the second liquid path 600. The cooling water and the insulating liquid exchange heat in the first water-cooled heat exchanger 310. After heat exchange, the insulating liquid flows back to the insulating liquid tank 200, and the cooling water flows back to the water tank 500 after heat exchange. The water tank 500 stores the cooling water that has absorbed heat and supplies water to the outside, realizing heat recovery and fully utilizing energy. The temperature sensor 800 detects the temperature of the cooling water in the water tank 500. When the temperature of the cooling water is too high, the control module 400 controls the third water pump 720 to operate, and the cooling water in the water tank 500 enters the third liquid path 700 for circulation. The air-cooled heat exchanger 710 dissipates heat from the cooling water, which can adjust the temperature of the cooling water in the water tank 500 to avoid overheating of the water supply.

[0040] like Figure 1 As shown, it also includes a second water-cooled heat exchanger 910 and a hot air pipeline 900. The exhaust port of the air compressor head 100 is connected to the second water-cooled heat exchanger 910 through the hot air pipeline 900, and the water tank 500 is connected to the second water-cooled heat exchanger 910 through the second liquid path 600. The high-temperature air discharged from the exhaust port of the air compressor head 100 enters the second water-cooled heat exchanger 910 through the hot air pipeline 900. The second water pump 610 drives the cooling water in the water tank 500 to circulate in the second liquid path 600. The cooling water exchanges heat with the high-temperature air through the second water-cooled heat exchanger 910. The cooling water that absorbs the heat of the high-temperature air returns to the water tank 500 through the second liquid path 600. The high-temperature air discharged from the air compressor head 100 can be heat recovered, thereby making full use of energy.

[0041] like Figure 1 As shown, a water cooling pipe 110 is provided in the stator plate inside the air compressor head 100, and the water tank 500 is connected to the water cooling pipe 110 through the second liquid path 600. The second water pump 610 drives the cooling water in the water tank 500 to circulate in the second liquid path 600. When the cooling water passes through the water cooling pipe 110, it absorbs the heat inside the air compressor head 100, and then returns to the water tank 500 through the second liquid path 600. The cooling water can absorb the heat inside the air compressor head 100 and cool down the air compressor head 100. It has high heat dissipation efficiency and can also recover the heat inside the air compressor head 100.

[0042] like Figure 1 As shown, a first oiling nozzle 210 is provided on the insulating liquid tank 200, and a second oiling nozzle 220 is provided on the air compressor head 100. The second oiling nozzle 220 is arranged at a position corresponding to the bearing inside the air compressor head 100. The first oiling nozzle 210 is connected to the second oiling nozzle 220 through a hose 230. Since the bearings of the air compressor head 100 need to be regularly filled with grease, when the bearings of the air compressor head 100 need to be filled with grease, it is only necessary to inject grease into the first oiling nozzle 210 on the insulating liquid tank 200. The grease can enter the interior of the air compressor head 100 through the hose 230 and the second oiling nozzle 220 to lubricate the bearings, which is easy to operate.

[0043] like Figure 1 As shown, a water purifier 620 is provided on the second liquid path 600 , and the water purifier 620 can filter out impurities in the cooling water to prevent the cooling water from generating scale in the second liquid path 600 and causing blockage of the second liquid path 600 .

[0044] like Figure 1As shown, the water tank 500 is provided with a liquid level gauge 810 for detecting the liquid level within the water tank 500. The output end of the liquid level gauge 810 is electrically connected to the input end of the control module 400. The water tank 500 is also provided with a water supply pipe 510 for connecting to the tap water supply system. The water supply pipe 510 is provided with a first solenoid valve 520. The output end of the control module 400 is electrically connected to the control end of the first solenoid valve 520. When the water tank 500 supplies water to the outside, the liquid level within the water tank 500 continuously decreases. If the liquid level gauge 810 detects that the liquid level within the water tank 500 is lower than a preset liquid level value, the control module 400 controls the first solenoid valve 520 to open, and the tap water supply system replenishes cooling water into the water tank 500 through the water supply pipe 510.

[0045] like Figure 1 As shown, an opening is provided on the insulating liquid tank 200, and an air filter device 240 is provided on the opening. The opening is connected to the air inlet of the air compressor head 100. The air enters the air inlet of the air compressor head 100 after being filtered by the air filter device 240. The air filter device 240 is an air filter element, which can filter out impurities in the air and prevent impurities from entering the air compressor head 100.

[0046] like Figure 1 As shown, a water supply pipe 530 is installed at the water outlet of the water tank 500. The water supply pipe 530 includes a first branch and a second branch. The first branch and the second branch are both provided with a second solenoid valve 540. The output end of the control module 400 is electrically connected to the control end of the second solenoid valve 540. The control module 400 controls the second solenoid valve 540 on the first branch or the second branch to open, and the water tank 500 can supply water to the outside through the first branch or the second branch. The first branch and the second branch can provide two water supply lines to meet the water needs of users in different locations. The water supply pipe 530 can also be expanded with other branches as needed.

[0047] like Figure 3 As shown, the control method according to the second embodiment of the present invention includes the following steps:

[0048] Step S100: The control module 400 controls the first water pump 320 to operate;

[0049] Step S200: The control module 400 controls the second water pump 610 to operate;

[0050] Step S300: The temperature sensor 800 detects the temperature of the cooling water in the water tank 500 and feeds back the temperature data to the control module 400;

[0051] In step S400 , the control module 400 determines whether the temperature of the cooling water in the water tank 500 is greater than a preset temperature value based on the temperature data. If the temperature of the cooling water is greater than the preset temperature value, the control module 400 controls the third water pump 720 and the air-cooled heat exchanger 710 to operate.

[0052] The control method of the second embodiment of the present invention is applied to the above-mentioned oxygen production system with heat recovery function. The insulating liquid in the insulating liquid tank 200 absorbs the heat on the surface of the air compressor head 100. Since the insulating liquid can directly contact the surface of the air compressor head 100, there is no need to set a water cooling pipe on the surface of the air compressor. The air compressor head 100 is directly cooled. Compared with the ordinary air cooling method and water cooling method, the heat dissipation efficiency is higher. The first water pump 320 drives the insulating liquid to circulate in the first liquid path 300, and the second water pump 610 drives the cooling water to circulate in the second liquid path 600. The cooling water and the insulating liquid Heat exchange is performed in the first water-cooled heat exchanger 310. After the heat exchange, the insulating liquid flows back to the insulating liquid tank 200. After the heat exchange, the cooling water flows back to the water tank 500. The water tank 500 stores the cooling water that has absorbed heat and supplies water to the outside, realizing heat recovery and making full use of energy. The temperature sensor 800 detects the temperature of the cooling water in the water tank 500. When the temperature of the cooling water is too high, the control module 400 controls the operation of the third water pump 720. The cooling water in the water tank 500 enters the third liquid path 700 for circulation. The air-cooled heat exchanger 710 dissipates heat for the cooling water, which can adjust the temperature of the cooling water in the water tank 500 to avoid overheating of the water supply.

[0053] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

1. Oxygen production system with heat recovery function, characterized in that: include: Air compressor head (100); an insulating liquid tank (200), wherein the air compressor head (100) is arranged in the insulating liquid tank (200), and the insulating liquid tank (200) is filled with insulating liquid for absorbing heat of the air compressor head (100); a first liquid circuit (300), a first water-cooled heat exchanger (310), and a first water pump (320); the insulating liquid tank (200) is connected to the first water-cooled heat exchanger (310) via the first liquid circuit (300); the first water pump (320) is installed on the first liquid circuit (300) to drive the insulating liquid to circulate in the first liquid circuit (300) to dissipate heat; A control module (400), wherein an output end of the control module (400) is electrically connected to a control end of the first water pump (320); A water tank (500), a second liquid circuit (600) and a second water pump (610), wherein the water tank (500) is connected to the first water-cooled heat exchanger (310) via the second liquid circuit (600), and the second water pump (610) is installed on the second liquid circuit (600) to drive the cooling water in the water tank (500) to circulate in the second liquid circuit (600) and exchange heat with the insulating liquid. The water tank (500) is provided with a water outlet for supplying water to the outside, and the output end of the control module (400) is electrically connected to the control end of the second water pump (610); A third liquid circuit (700), an air-cooled heat exchanger (710) and a third water pump (720); the water tank (500) is connected to the air-cooled heat exchanger (710) through the third liquid circuit (700); the third water pump (720) is installed on the third liquid circuit (700) to drive the cooling water to circulate in the third liquid circuit (700) to dissipate heat; the output end of the control module (400) is electrically connected to the control end of the third water pump (720); and the output end of the control module (400) is electrically connected to the control end of the air-cooled heat exchanger (710); A temperature sensor (800) is used to detect the temperature of the cooling water in the water tank (500), and an output end of the temperature sensor (800) is electrically connected to an input end of the control module (400).

2. The oxygen production system with heat recovery function according to claim 1, characterized in that: It also includes a second water-cooled heat exchanger (910) and a hot air pipeline (900), wherein the exhaust port of the air compressor head (100) is connected to the second water-cooled heat exchanger (910) through the hot air pipeline (900), and the water tank (500) is connected to the second water-cooled heat exchanger (910) through the second liquid path (600).

3. The oxygen production system with heat recovery function according to claim 1, characterized in that: A water cooling pipe (110) is provided in the air compressor head (100), and the water tank (500) is connected to the water cooling pipe (110) via the second liquid path (600).

4. The oxygen production system with heat recovery function according to claim 1, characterized in that: The insulating liquid tank (200) is provided with a first oiling nozzle (210), the air compressor head (100) is provided with a second oiling nozzle (220), and the first oiling nozzle (210) is connected to the second oiling nozzle (220).

5. The oxygen production system with heat recovery function according to claim 1, characterized in that: A water purifier (620) is provided on the second liquid path (600).

6. The oxygen production system with heat recovery function according to claim 1, characterized in that: A water supply pipe (510) is installed on the water tank (500), and the water supply pipe (510) is used to connect to the tap water supply system. A first solenoid valve (520) is provided on the water supply pipe (510), and the output end of the control module (400) is electrically connected to the control end of the first solenoid valve (520).

7. The oxygen production system with heat recovery function according to claim 6, characterized in that: It also includes a liquid level meter (810), which is used to detect the liquid level in the water tank (500), and the output end of the liquid level meter (810) is electrically connected to the input end of the control module (400).

8. The oxygen production system with heat recovery function according to claim 1, characterized in that: The insulating liquid tank (200) is provided with an opening, an air filter device (240) is provided on the opening, and the opening is connected to the air inlet of the air compressor head (100).

9. The oxygen production system with heat recovery function according to claim 1, characterized in that: A water supply pipe (530) is installed on the water outlet, a second solenoid valve (540) is provided on the water supply pipe (530), and the output end of the control module (400) is electrically connected to the control end of the second solenoid valve (540).

10. A control method, applied to the oxygen production system with heat recovery function according to any one of claims 1 to 9, comprising: The control module (400) controls the operation of the first water pump (320); The control module (400) controls the operation of the second water pump (610); The temperature sensor (800) detects the temperature of the cooling water in the water tank (500) and feeds back the temperature data to the control module (400); The control module (400) determines whether the temperature of the cooling water in the water tank (500) is greater than a preset temperature value based on the temperature data. If the temperature of the cooling water is greater than the preset temperature value, the control module (400) controls the third water pump (720) and the air-cooled heat exchanger (710) to operate.

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