Cooling system and method for ensuring full-load operation of internal combustion engine in high-temperature environment
By introducing a cooling tower circulation system and an exhaust fan, combined with high-temperature and low-temperature cooling circulation systems and air-cooled radiators, the problem of insufficient cooling by air-cooled radiators in high-temperature environments is solved, enabling the internal combustion engine to operate at full load and achieve efficient cooling in high-temperature environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-31
- Publication Date
- 2026-03-13
AI Technical Summary
In high-temperature environments, the air-cooled radiator of an internal combustion engine cannot meet the cooling requirements, resulting in a decrease in output power and affecting operating efficiency and reliability.
A cooling tower circulation system is introduced, combined with high-temperature and low-temperature cooling circulation systems and air-cooled radiators. Heat exchange is achieved through direct contact between water and air. An exhaust fan is configured to accelerate air circulation and extend the residence time and flow path of hot water.
It achieves efficient cooling of internal combustion engines in high-temperature environments, ensuring full-load operation and improving operating efficiency and reliability.
Smart Images
Figure CN121654508A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of internal combustion engine cooling technology, specifically to a cooling system and method for ensuring full-load operation of an internal combustion engine under high-temperature conditions. Background Technology
[0002] Heavy-duty oil internal combustion engines can operate at full load under standard conditions, and their cooling systems typically employ air-cooled systems. However, as ambient temperatures rise, reaching 55°C, the heat dissipation efficiency of air-cooled radiators decreases significantly, failing to lower the coolant temperature to the engine's intake requirements. At this point, the engine's output power drops to 80% of its full-load power, severely impacting its operating efficiency and reliability. Especially in high-temperature environments such as desert regions abroad, air-cooled radiators alone cannot meet the cooling demands, preventing the engine from operating at full load. Summary of the Invention
[0003] The present invention addresses the problems mentioned above by designing a cooling system and method to ensure full-load operation of an internal combustion engine under high-temperature conditions. It introduces a cooling tower circulation system to achieve efficient cooling and ensure that the internal combustion engine can operate at full load under high-temperature conditions.
[0004] To achieve the above objectives, the present invention provides a cooling system that ensures full-load operation of an internal combustion engine under high-temperature conditions, comprising a high-temperature cooling circulation system, a low-temperature cooling circulation system, and an air-cooled radiator, and further comprising a high-temperature electric valve, a low-temperature electric valve, and a cooling tower circulation system. The high-temperature cooling circulation system, the high-temperature side of the air-cooled radiator, and the high-temperature electric valve form a heat exchange loop, and the low-temperature cooling circulation system, the low-temperature side of the air-cooled radiator, and the low-temperature electric valve form a heat exchange loop. The cooling tower circulation system comprises a cooling tower, a high-temperature plate heat exchanger, and a low-temperature plate heat exchanger that constitute the heat exchange loop.
[0005] Furthermore, the cooling tower includes an upper part of the tower body, a lower part of the tower body, a water inlet cover, a water inlet pipe, and a water outlet pipe. The upper part of the tower body is fixedly supported on the lower part of the tower body by multiple sets of support vertical rods arranged in a circumferential array. The water inlet cover is fixedly supported in the cavity of the upper part of the tower body. The water inlet pipe leads hot water to the water inlet cover. A cold water collection tank is opened in the lower part of the tower body. The water outlet pipe connects to the cold water collection tank and leads cold water out of the lower part of the tower body.
[0006] Furthermore, the water intake cover is truncated cone-shaped and includes a fixedly connected top plate and side wall. The side wall is fixedly supported in the cavity of the upper part of the tower body by a supporting horizontal plate below.
[0007] Furthermore, the top plate is recessed to form a hot water collection tank, and the water outlet of the inlet pipe is located above the hot water collection tank.
[0008] Furthermore, the sidewall is arranged in a circumferential array with multiple sets of water-guiding plates, and the water-guiding plates are spiral plates with an outward taper.
[0009] Furthermore, the upper part of the tower body is open to form an air outlet, and the adjacent supporting vertical rods form an air inlet.
[0010] Furthermore, an air-guiding mechanism is installed on the upper part of the tower body. The air-guiding mechanism includes a mounting plate spanning the opening, as well as a motor, a fan, and a protective cover. The outer casing of the motor is fixedly connected to the mounting plate, and the output shaft is connected to the fan. The protective cover is fixedly connected to the mounting plate and encloses the motor.
[0011] The present invention also includes a cooling method for a cooling system that ensures full-load operation of an internal combustion engine under high-temperature conditions, comprising the following steps: under standard conditions, hot water from the outlet of the high-temperature cooling circulation system of the internal combustion engine is cooled by the high-temperature side of an air-cooled radiator to meet the conditions for cooling water to enter the unit and then returned to the inlet of the high-temperature cooling circulation system; hot water from the outlet of the low-temperature cooling circulation system of the internal combustion engine is cooled by the low-temperature side of an air-cooled radiator to meet the conditions for cooling water to enter the unit and then returned to the inlet of the low-temperature cooling circulation system. When the ambient temperature reaches 55℃, start the cooling tower circulation system. Close all high-temperature electric valves and allow high-temperature cooling water to flow to the high-temperature plate on one side; close all low-temperature electric valves and allow low-temperature cooling water to flow to the high-temperature plate on the other side. The cooling tower's cold water first passes through a low-temperature plate heat exchanger, then through a high-temperature plate heat exchanger, and finally returns to the hot water side of the cooling tower.
[0012] In summary, the present invention has the following advantages and beneficial technical effects: 1. The present invention aims to solve the problem that internal combustion engine units in the domestic environment are generally only equipped with air-cooled radiators. In desert areas at home and abroad or in environments where the outdoor temperature is higher than 55°C, the cooling of the cooling water by air-cooled radiators alone cannot reduce the temperature of the cooling water to meet the requirements of the internal combustion engine. Therefore, under the premise of configuring air-cooled radiators, a cooling tower circulation system is introduced to achieve heat exchange through direct contact between water and air, achieve efficient cooling, and ensure that the internal combustion engine can operate at full load in high-temperature environments.
[0013] 2. In this invention, the high-temperature cooling circulation system is used for heat exchange of high-temperature cooling water under standard conditions, the low-temperature cooling circulation system is used for heat exchange of low-temperature cooling water under standard conditions, and the cooling tower circulation system is used for heat exchange of cooling water under high-temperature conditions, including cooling tower heat exchange, high-temperature plate heat exchanger cooling, and low-temperature plate heat exchanger cooling.
[0014] 3. The hot water collection tank formed by the concave top plate in this invention achieves orderly overflow of hot water through centralized flow guidance. Combined with the spiral water guide plate and supporting horizontal plate, it significantly extends the residence time and flow path of hot water within the tower, ensuring sufficient contact and heat exchange with cold air. The exhaust fan mechanism accelerates air circulation within the tower, speeding up the exhaust of hot air from the opening at the top of the tower, thus improving airflow efficiency and thermal circulation performance. Attached Figure Description
[0015] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the cooling process of the present invention; Figure 2 This is a three-dimensional schematic diagram of the cooling tower in this invention; Figure 3 This is a front view schematic diagram of the cooling tower in this invention; Figure 4 This is a partial structural diagram of the cooling tower in this invention; Figure 5 This is a three-dimensional schematic diagram of the water-guiding cover in this invention; Figure 6 This is a three-dimensional schematic diagram of the air-expelling mechanism in this invention.
[0016] The reference numerals in the attached figures are: 1. High-temperature cooling circulation system; 2. Low-temperature cooling circulation system; 3. High-temperature side of air-cooled radiator; 4. Low-temperature side of air-cooled radiator; 5. High-temperature electric valve; 6. Low-temperature electric valve; 7. Cooling tower; 71. Upper part of tower body; 72. Lower part of tower body; 73. Water inlet cover; 731. Top plate; 732. Side wall; 74. Water inlet pipe; 75. Water outlet pipe; 76. Supporting vertical rod; 77. Supporting horizontal plate; 78. Water inlet plate; 79. Air intake mechanism; 791. Mounting plate; 792. Motor; 793. Exhaust fan; 794. Protective cover; 8. High-temperature heat exchanger; 9. Low-temperature heat exchanger. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout; the described embodiments are some embodiments of this invention, but not all embodiments; the embodiments and directional terms described below with reference to the accompanying drawings are exemplary and intended to explain this invention, and should not be construed as limiting this invention; all other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. The embodiments of this invention will be described in detail below with reference to the accompanying drawings: The following is in conjunction with the appendix Figures 1-6 The present invention will be further described in detail below: Example 1 like Figure 1 As shown, this embodiment discloses a cooling system that ensures full-load operation of an internal combustion engine under high-temperature conditions. It includes a high-temperature cooling circulation system 1, a low-temperature cooling circulation system 2, an air-cooled radiator, a high-temperature electric valve 5, a low-temperature electric valve 6, and a cooling tower circulation system. The high-temperature cooling circulation system 1, the high-temperature side 3 of the air-cooled radiator, and the high-temperature electric valve 5 form a heat exchange loop for high-temperature cooling water under standard conditions. The low-temperature cooling circulation system 2, the low-temperature side 4 of the air-cooled radiator, and the low-temperature electric valve 6 form a heat exchange loop for low-temperature cooling water under standard conditions. The cooling tower circulation system includes a cooling tower 7, a high-temperature plate heat exchanger 8, and a low-temperature plate heat exchanger 9, which form the heat exchange loop under high-temperature conditions. The high-temperature electric valve 5 controls the flow path of the high-temperature cooling water. Under standard operating conditions, the high-temperature electric valve 5 is open, allowing the high-temperature cooling water to circulate in the heat exchange loop formed by the high-temperature cooling circulation system 1. When the ambient temperature reaches 55°C, the high-temperature electric valve 5 is closed, allowing the high-temperature cooling water to flow through the high-temperature plate heat exchanger 8 and circulate in the heat exchange loop formed by the cooling tower circulation system. Similarly, the low-temperature electric valve 6 is used to control the flow path of the low-temperature cooling water.
[0018] like Figures 2-3 As shown, the cooling tower 7 includes an upper part 71, a lower part 72, a water inlet cover 73, an inlet pipe 74, and an outlet pipe 75. The upper part 71 is fixedly supported on the lower part 72 by multiple sets of supporting vertical rods 76. The multiple sets of supporting vertical rods 76 are arranged in a circular array about the central axis of the upper part 71. The water inlet cover 73 is fixedly supported in the cavity of the upper part 71. The inlet pipe 74 leads to the cavity of the upper part 71 and leads hot water to the water inlet cover 73. A cold water collection tank is opened in the lower part 72. The outlet pipe 75 connects to the cold water collection tank and leads cold water out of the lower part 72.
[0019] like Figures 4-5As shown, the water intake cover 73 is frustoconical in shape, comprising an integrally formed top plate 731 and side walls 732. The side walls 732 are fixedly supported within the cavity of the upper part 71 of the tower body by multiple sets of supporting horizontal plates 77 below, which are arranged in a circular array about the central axis of the upper part 71 of the tower body. The top plate 731 is recessed to form a hot water collection tank, and the outlet of the water inlet pipe 74 is located above the hot water collection tank. Multiple sets of water intake plates 78 are fixedly connected to the side walls 732. The water intake plates 78 are tapered spiral plates arranged in a circular array about the central axis of the side walls 732.
[0020] like Figure 2 as well as Figure 6 As shown, the upper part 71 of the tower body has an open opening to form an air outlet, and the adjacent supporting vertical rods 76 form an air inlet. An air-guiding mechanism 79 is installed on the upper part 71 of the tower body. The air-guiding mechanism 79 includes a mounting plate 791 spanning across the opening, a motor 792, a fan 793, and a protective cover 794. The outer casing of the motor 792 is fixedly connected to the mounting plate 791 by fastening screws. The output shaft passes through the mounting plate 791 and drives the fan 793. The protective cover 794 is fixedly connected to the mounting plate 791 by fastening bolts. The protective cover 794 cooperates with the mounting plate 791 to enclose the motor 792.
[0021] Example 2 The present invention provides a cooling method for a cooling system that ensures full-load operation of an internal combustion engine under high-temperature conditions: Under standard conditions, the hot water from the outlet of the high-temperature cooling circulation system 1 of the internal combustion engine is cooled by the high-temperature side 3 of the air-cooled radiator. After reaching the conditions for the unit's cooling water to enter the engine, it returns to the inlet of the high-temperature cooling circulation system 1. Similarly, the hot water from the outlet of the low-temperature cooling circulation system 2 of the internal combustion engine is cooled by the low-temperature side 4 of the air-cooled radiator. After reaching the conditions for the unit's cooling water to enter the engine, it returns to the inlet of the low-temperature cooling circulation system 2. When the ambient temperature reaches 55℃, the cooling tower circulation system is activated, and the high-temperature electric valve 5 is closed, allowing the high-temperature cooling water to flow to the high-temperature heat exchanger 8 side for cooling. Similarly, the low-temperature electric valve 6 is closed, allowing the low-temperature cooling water to flow to the low-temperature heat exchanger 9 and then be cooled by the high-temperature heat exchanger 8 side. The cold water in cooling tower 7 first passes through low-temperature platen 9 and then through high-temperature platen 8 to cool the cooling tower circulation system, and finally returns to the hot water side of cooling tower 7.
[0022] Hot water from the hot water side of cooling tower 7 enters the water inlet shroud 73 through the inlet pipe 74, and overflows from the hot water collection tank after being concentrated on the top plate 731. The overflowing hot water falls down along the side wall 732 and flows in a spiral downward flow under the guidance of the water inlet plate 78. Some of the hot water falls directly into the cold water collection tank in the lower part of the tower body 72, while the other part is blocked by the support horizontal plate 77 and then enters the cold water collection tank. The water distribution system consisting of the hot water collection tank, the spiral water inlet plate 78 and the support horizontal plate 77 is designed to extend the downward flow path and time of the hot water to achieve sufficient heat exchange and cooling.
[0023] When hot water flows from top to bottom, it exchanges heat with the air inside the tower cavity. The cold water descends and the hot air rises. At the same time, the exhaust fan 79 at the top of the cooling tower 7 is activated, and the motor 792 outputs power to drive the exhaust fan 793 to rotate, accelerating the exhaust of hot air from the opening at the top of the tower 71, accelerating air circulation, and improving air flow efficiency and heat circulation efficiency.
[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A cooling system for ensuring full-load operation of an internal combustion engine under high-temperature conditions, comprising a high-temperature cooling circulation system, a low-temperature cooling circulation system, and an air-cooled radiator, characterized in that: It also includes a high-temperature electric valve, a low-temperature electric valve, and a cooling tower circulation system. The high-temperature cooling circulation system, the high-temperature side of the air-cooled radiator, and the high-temperature electric valve form a heat exchange loop. The low-temperature cooling circulation system, the low-temperature side of the air-cooled radiator, and the low-temperature electric valve form a heat exchange loop. The cooling tower circulation system includes a cooling tower, a high-temperature plate heat exchanger, and a low-temperature plate heat exchanger that form the heat exchange loop.
2. The cooling system for ensuring full-load operation of an internal combustion engine under high-temperature conditions according to claim 1, characterized in that: The cooling tower includes an upper part of the tower body, a lower part of the tower body, a water inlet cover, an inlet pipe, and an outlet pipe. The upper part of the tower body is fixedly supported on the lower part of the tower body by multiple sets of support vertical rods arranged in a circular array. The water inlet cover is fixedly supported in the cavity of the upper part of the tower body. The inlet pipe leads hot water to the water inlet cover. A cold water collection tank is opened in the lower part of the tower body. The outlet pipe connects to the cold water collection tank and leads cold water out of the lower part of the tower body.
3. The cooling system for ensuring full-load operation of an internal combustion engine under high-temperature conditions according to claim 2, characterized in that: The water intake cover is truncated cone-shaped and includes a fixedly connected top plate and side wall. The side wall is fixedly supported in the cavity of the upper part of the tower body by a supporting horizontal plate below.
4. The cooling system for ensuring full-load operation of an internal combustion engine under high-temperature conditions according to claim 3, characterized in that: The top plate is recessed to form a hot water collection tank, and the water outlet of the inlet pipe is located above the hot water collection tank.
5. A cooling system for ensuring full-load operation of an internal combustion engine under high-temperature conditions, as described in claim 3, characterized in that: The sidewall is arranged in a circumferential array with multiple sets of water-guiding plates, and the water-guiding plates are spiral plates with an outward taper.
6. A cooling system for ensuring full-load operation of an internal combustion engine under high-temperature conditions, as described in claim 2, characterized in that: The upper part of the tower body is open to form an air outlet, and the adjacent supporting vertical rods form an air inlet.
7. A cooling system for ensuring full-load operation of an internal combustion engine under high-temperature conditions, as described in claim 6, characterized in that: The upper part of the tower is equipped with an air-guiding mechanism, which includes a mounting plate spanning the opening, a motor, a fan, and a protective cover. The outer casing of the motor is fixedly connected to the mounting plate, and the output shaft is connected to the fan. The protective cover is fixedly connected to the mounting plate and encloses the motor.
8. A cooling method for a cooling system that ensures full-load operation of an internal combustion engine under high-temperature conditions, characterized in that: The cooling method of the cooling system according to claim 1 is as follows: under standard conditions, hot water from the outlet of the high-temperature cooling cycle system of the internal combustion engine is cooled by the high-temperature side of the air-cooled radiator, and after reaching the conditions for the cooling water to enter the unit, it returns to the inlet of the high-temperature cooling cycle system; hot water from the outlet of the low-temperature cooling cycle system of the internal combustion engine is cooled by the low-temperature side of the air-cooled radiator, and after reaching the conditions for the cooling water to enter the unit, it returns to the inlet of the low-temperature cooling cycle system. When the ambient temperature reaches 55℃, start the cooling tower circulation system. Close all high-temperature electric valves and allow high-temperature cooling water to flow to the high-temperature plate on one side; close all low-temperature electric valves and allow low-temperature cooling water to flow to the high-temperature plate on the other side. The cooling tower's cold water first passes through a low-temperature plate heat exchanger, then through a high-temperature plate heat exchanger, and finally returns to the hot water side of the cooling tower.