CN115341985B - A portable water-cooled engine - Google Patents

Abstract

The invention belongs to the field of engine cooling, and specifically relates to a portable water-cooled engine; in order to solve the problem that the existing portable engine is difficult to meet the heat dissipation requirements, the invention proposes a portable water-cooled engine that can meet the heat dissipation requirements of the engine and does not waste too much energy; in order to achieve the above-mentioned purpose, the technical solution adopted in this application is a portable water-cooled engine, including an engine and a cooling device, the cooling device including a cooling water pipe and a heat release structure; the neck of the engine is provided with a cooling water pipe slot, the cooling water pipe is wound around the neck of the engine and arranged in the slot; a card plate is provided outside the slot, and the card plate is detachably connected to the engine; a cold water inlet and a hot water outlet are provided on the card plate, and the cold water inlet and the hot water outlet are respectively connected to the two ends of the cooling water pipe.

Description

A portable water-cooled engine

Technical Field

The invention belongs to the field of engine cooling, and in particular relates to a portable water-cooled engine.

Background Art

The country vigorously advocates environmentally friendly travel, so many electric vehicles have come into being. However, since the current technology in terms of battery capacity is not very mature, it cannot solve the problem of electric vehicle endurance very well. Therefore, the weak endurance of electric vehicles is the main limitation that electric vehicles cannot develop better. Therefore, in order to solve the problem of weak endurance, portable engines are now installed. When the battery is low, the engine is started to drive the electric vehicle forward and charge the battery at the same time. However, due to the limited size and space of the electric vehicle itself, the engine and its related configuration cannot be too large. Therefore, it is chosen to place the engine externally for natural cooling or add a fan for air cooling. However, natural cooling cannot meet the heat dissipation needs of the engine, and adding a fan will waste a lot of energy.

Invention content

In order to solve the above-mentioned problem that the existing portable engine is difficult to meet the heat dissipation demand, the present invention proposes a portable water-cooled engine that can meet the heat dissipation demand of the engine without wasting too much energy.

In order to achieve the above-mentioned purpose, the technical solution adopted in the present application is a portable water-cooled engine, including an engine and a cooling device, wherein the cooling device includes a cooling water pipe and a heat release structure; a slot is provided on the neck of the engine, and the cooling water pipe is wrapped around the neck of the engine and arranged in the slot; a card plate is provided outside the slot, and the card plate is detachably connected to the engine; a cold water inlet and a hot water outlet are provided on the card plate, and the cold water inlet and the hot water outlet are respectively connected to the two ends of the cooling water pipe; the heat release structure is provided with a first water pipe and a second water pipe, the second water pipe is connected to the cold water inlet, and the hot water outlet is connected to the second water pipe.

Preferably, the heat dissipation structure also includes an inner heat dissipation tube and an outer heat dissipation tube; the inner heat dissipation tube is provided with a heat dissipation tube wound around the outer tube wall, and the two ends of the heat dissipation tube are respectively connected to the first water pipe and the second water pipe; the outer heat dissipation tube is sleeved outside the inner heat dissipation tube, and the bottom of the outer heat dissipation tube is fixedly connected to the bottom of the inner heat dissipation tube; the outer heat dissipation tube is provided with a plurality of holes.

Preferably, the top end of the external heat dissipation pipe is provided with a first bell mouth, and the lower end of the first bell mouth is fixedly connected to the upper end of the external heat dissipation pipe.

Preferably, a second bell mouth is provided at the lower end of the inner heat release pipe, and an upper end of the second bell mouth is fixedly connected to the bottom end of the inner heat release pipe.

Preferably, the second water pipe is arranged inside the second bell-mouth, a small hole is opened at the bottom of the inner heat release pipe, and the head end of the second water pipe is located at the small hole of the inner heat release pipe, so that the heat release pipe is connected to the second water pipe.

Preferably, a plurality of holes are opened in the lower half of the external heat dissipation pipe.

Preferably, the holes have at least three layers from low to high, namely, primary air inlet holes, secondary air inlet holes and tertiary air inlet holes.

Preferably, the apertures of the primary air inlet holes, the secondary air inlet holes and the tertiary air inlet holes decrease from low to high, and the number of holes increases from low to high.

Preferably, it further comprises a water tank, which is provided with a water inlet and a water outlet, wherein the water inlet is arranged at the lower part of the water tank and connected to the second water pipe, and the water outlet is arranged at the upper part of the water tank and connected to the first water pipe.

Preferably, the inner side of the heat dissipation pipe has no wall, so that the water flow can directly contact the outer wall of the inner heat dissipation pipe.

Beneficial effects of the present invention:

(1) A slot is provided at the place where the heat sink is provided on the engine neck, so that water cooling can be performed without affecting the heat dissipation of the heat sink;

(2) The heat release structure is used to make the hot water cool faster, so as to achieve the recycling of water;

(3) Due to the existence of the heat release structure, water cooling is freed from the traditional large water tank. The water tank of the present application does not need to be too large, as long as it can complete the water circulation, and can be modified or removed according to the power of the engine;

(4) The present application utilizes the principle that hot water has a small density and cold water has a large density, so hot water flows upward, and then adds a heat dissipation structure to convert hot water into cold water, so that the water cycle is completed, the use of a water pump is abandoned, and energy is saved;

(5) In the heat dissipation structure of the present application, hot water can directly contact the wall of the inner heat dissipation tube, thereby increasing the contact area between the inner heat dissipation tube and the hot water;

(6) The heat dissipation pipe is wound around the inner heat dissipation pipe to extend the heat dissipation time;

(7) The inner heat release tube is a hollow structure. As the air expands due to heat, its density decreases, so the hot air moves upwards, resulting in negative pressure inside the tube. The cold air is pressed into the inner heat release tube from the bottom, taking away the heat.

(8) Water flows from top to bottom, and air flows from bottom to top, so the two move in opposite directions, making the heat exchange efficiency higher;

(9) An inverted bell mouth is provided at the bottom of the internal heat release pipe, which increases the air entry area, prevents whistling sound, and has the function of noise reduction;

(10) The bottom of the external heat release pipe is closed, and a hole is opened at the bottom. The air entering the external heat release pipe is the air from the side of the heat release structure, which ensures the air intake of the internal heat release pipe;

(11) The external heat pipe is provided with multi-stage air inlet holes to improve the cooling efficiency. When the engine is working at high power, the air inlet speed can also be increased accordingly to ensure the heat dissipation effect, and the bell mouth at the top of the external heat pipe can ensure the air discharge rate;

(12) The water flow rate of the engine described in the present application will increase as the engine's heating power increases. At the same time, the air flow rate of the heat dissipation structure will also increase as the water flow speed and temperature difference increase, and the heat dissipation efficiency will also increase, thereby better protecting the engine.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1: Schematic diagram of engine structure 1;

Figure 2: Schematic diagram of the engine structure II;

Figure 3: Schematic diagram of heat dissipation structure.

In the figure: 1. first water pipe, 2. inner heat release pipe, 3. heat release pipe, 4. first bell mouth, 5. outer heat release pipe, 6. third-level air inlet, 7. second-level air inlet, 8. first-level air inlet, 9. second bell mouth, 10. second water pipe, 11. water inlet, 12. water outlet, 13. water tank, 14. card plate, 15. hot water outlet, 16. cold water inlet, 17. engine, 18. cooling water pipe, 19. card slot.

DETAILED DESCRIPTION

A portable water-cooled engine comprises an engine 17 and a cooling device, wherein the cooling device comprises a cooling water pipe 18 and a heat release structure; a slot 19 for the cooling water pipe 18 is provided on the neck of the engine 17, and the cooling water pipe 18 is wound around the neck of the engine 17 and arranged in the slot 19; a card plate 14 is provided outside the slot 19, and the card plate 14 is detachably connected to the engine 17; a cold water inlet 16 and a hot water outlet 15 are provided on the card plate 14, and the cold water inlet 16 and the hot water outlet 15 are respectively connected to the two ends of the cooling water pipe 18; the heat release structure is provided with a first water pipe 1 and a second water pipe 10, and the second water pipe 10 is connected to the cold water inlet 16, and the hot water outlet 15 is connected to the second water pipe 10.

The heat dissipation structure also includes: an inner heat dissipation tube 2 and an outer heat dissipation tube 5; the inner heat dissipation tube is provided with a heat dissipation tube 3 wound on the outer tube wall, and the two ends of the heat dissipation tube 3 are respectively connected to the first water pipe 1 and the second water pipe 10; the outer heat dissipation tube 5 is sleeved outside the inner heat dissipation tube 2, and the bottom of the outer heat dissipation tube 5 is fixedly connected to the bottom of the inner heat dissipation tube 2; the outer heat dissipation tube 5 is provided with a plurality of holes.

The top end of the external heat dissipation pipe 5 is provided with a first bell mouth 4 , and the lower end of the first bell mouth 4 is fixedly connected to the upper end of the external heat dissipation pipe 5 .

The lower end of the inner heat release tube 2 is provided with a second bell mouth 9 , and the upper end of the second bell mouth 9 is fixedly connected to the bottom end of the inner heat release tube 2 .

The second water pipe 10 is arranged inside the second bell mouth 9 , a small hole is opened at the bottom of the inner hot water pipe, and the head end of the second water pipe 10 is located at the small hole of the inner hot water pipe, so that the heat dissipation pipe 3 is connected to the second water pipe 10 .

The lower half of the external heat dissipating pipe 5 is provided with a plurality of holes.

The holes have at least three layers from low to high, namely, primary air inlet holes 8, secondary air inlet holes 7 and tertiary air inlet holes 6.

Preferably, the apertures of the three layers of air inlet holes decrease from low to high, and the number of holes increases from low to high.

It also includes a water tank 13, which is provided with a water inlet 11 and a water outlet 12. The water inlet 11 is provided at the lower part of the water tank 13 and connected to the second water pipe 10, and the water outlet 12 is provided at the upper part of the water tank 13 and connected to the first water pipe 1.

The inner side of the heat dissipation tube 3 has no wall, so that the water flow can directly contact the outer wall of the inner heat dissipation tube 2 .

A slot 19 is provided at the place where the heat sink is provided on the neck of the engine 17, so that water cooling can be performed without affecting the heat dissipation of the heat sink; the heat release structure is adopted to make the hot water cool faster, so as to achieve the recycling of water; due to the existence of the heat release structure, water cooling gets rid of the traditional large water tank 13, and the water tank 13 of the present application does not need to be too large, as long as it can complete the water circulation, and can be modified or removed according to the power of the engine 17; the present application utilizes the principle that the hot water has a small density and the cold water has a large density, so the hot water flows upward, and then adds a heat release structure to convert the hot water into cold water, so that the water circulation can be completed, the use of a water pump is abandoned, and energy is saved; in the heat release structure of the present application, the hot water can directly contact the wall of the inner heat release tube 2, increasing the contact area between the inner heat release tube 2 and the hot water; and the heat release tube 3 is wound around the inner heat release tube 2, so as to extend the heat release time; the inner heat release tube 2 is a hollow structure, and since the density of the air expands due to heat, the hot air flows upward, and the negative pressure in the tube, the cold air is pressed into the inner heat release tube 2 from the bottom of the inner heat release tube 2, taking away the heat The water flows from top to bottom, and the air flows from bottom to top, so the two move in opposite directions, which makes the heat exchange efficiency higher; an inverted bell mouth is provided at the bottom of the inner heat release tube 2, so that the air entry area becomes larger, preventing the occurrence of whistling sound, and having the function of noise reduction; the outer heat release tube 5 is closed at the bottom, and a hole is opened at the bottom, and the air entering the outer heat release tube 5 is the air on the side of the heat release structure, which ensures the air intake of the inner heat release tube 2; the outer heat release tube 5 is provided with a multi-stage air inlet hole, so that the cooling efficiency is improved, so that when the engine 17 works at high power, the air entry speed can also be increased accordingly to ensure the heat dissipation effect, and the bell mouth at the top of the outer heat release tube 5 can ensure the air discharge rate; and the outer wall of the outer heat release tube 5 can exchange heat with the air, further ensuring the heat dissipation efficiency; the water flow rate of the engine 17 described in the present application will increase with the increase of the heating power of the engine 17, and the air flow rate of the heat dissipation structure will also increase with the increase of the water flow speed and the temperature difference, and the heat dissipation efficiency will also increase, so that the engine 17 can be better protected.

In the present application, the multi-stage hole design of the external heat pipe 5 is that when the heat generation power of the engine 17 is relatively small, the main air inlet hole is the first-stage air inlet hole 8. As the heat generation power of the engine increases, the air intake volume of each stage of the air inlet hole will gradually increase with the increase of the temperature difference.

The preferred specific embodiments of the invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art based on the concept of the invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the scope of protection determined by the claims.

Claims (7)

1. A portable water-cooled engine, comprising an engine (17), characterized in that it also comprises a cooling device, wherein the cooling device comprises a cooling water pipe (18) and a heat release structure; a slot (19) is provided on the neck of the engine (17), the cooling water pipe (18) is wound around the neck of the engine (17) and is arranged in the slot (19); a card plate (14) is provided outside the slot (19), the card plate (14) is detachably connected to the engine (17); a cold water inlet (16) and a hot water outlet (15) are provided on the card plate (14), the cold water inlet (16) and the hot water outlet (15) are respectively connected to two ends of the cooling water pipe (18); the heat release structure is provided with a first water pipe (1) and a second water pipe (10), the first water pipe (1) is connected to the cold water inlet (16), and the hot water outlet (15) is connected to the second water pipe (10); The heat release structure further comprises an inner heat release tube (2) and an outer heat release tube (5); the inner heat release tube (2) is provided with a heat dissipation tube (3) wound around the outer tube wall, and the two ends of the heat dissipation tube (3) are respectively connected to the first water pipe (1) and the second water pipe (10); the outer heat release tube (5) is sleeved outside the inner heat release tube (2), and the bottom of the outer heat release tube (5) is fixedly connected to the bottom of the inner heat release tube (2); the outer heat release tube (5) is provided with a plurality of holes; It also includes a water tank (13), the water tank (13) being provided with a water inlet (11) and a water outlet (12), the water inlet (11) being provided at the lower part of the water tank (13) and connected to the second water pipe (10), and the water outlet (12) being provided at the upper part of the water tank (13) and connected to the first water pipe (1); The inner side of the heat dissipation pipe (3) has no wall, so that the water flow can directly contact the outer wall of the inner heat dissipation pipe (2); The principle that hot water flows upward is utilized because hot water has a lower density than cold water, and a heat dissipation structure is then added to turn hot water into cold water, thus completing the water cycle. This eliminates the need for water pumps and saves energy. 2. A portable water-cooled engine according to claim 1, characterized in that the top end of the external heat pipe (5) is provided with a first bell mouth (4), and the lower end of the first bell mouth (4) is fixedly connected to the upper end of the external heat pipe (5). 3. A portable water-cooled engine according to claim 1, characterized in that a second bell mouth (9) is provided at the lower end of the inner heat release pipe (2), and the upper end of the second bell mouth (9) is fixedly connected to the bottom end of the inner heat release pipe (2). 4. A portable water-cooled engine according to claim 3, characterized in that the second water pipe (10) is arranged on the inner side of the second bell mouth (9), a small hole is opened at the bottom of the inner heat release pipe (2), and the head end of the second water pipe (10) is located at the small hole of the inner heat release pipe (2), so that the heat dissipation pipe (3) is connected to the second water pipe (10). 5. A portable water-cooled engine according to claim 1, characterized in that a plurality of holes are opened in the lower half of the external heat pipe (5). 6. A portable water-cooled engine according to claim 5, characterized in that the holes have at least three layers from low to high, namely, a primary air intake hole (8), a secondary air intake hole (7) and a tertiary air intake hole (6). 7. A portable water-cooled engine according to claim 6, characterized in that the apertures of the first-stage air intake hole (8), the second-stage air intake hole (7) and the third-stage air intake hole (6) decrease from low to high, and the number of holes increases from low to high.