KR20030090343A - Heating system and exchanging device of dual heater - Google Patents

Abstract

PURPOSE: A dual heater heating system and a dual heater heat exchanger for an internal combustion engine are provided to be mounted independent of the engine, and connected with a coolant circulation line of the engine to heat a room even when the engine is stopped and warm up the engine at the same time. CONSTITUTION: A dual heater heating system(1) comprises a first bypass line(2a) and a second bypass line(2b) connected with a coolant recovery line(13); a check valve(21) installed to the coolant recovery line between points on which the coolant recovery line is connected with the first bypass line and the second bypass line; a pre-heater water pump(4) and an air heater water pump(5) installed to the first bypass line and the second bypass line, respectively; a dual heater heat exchanger(3) having a first water tube and a second water tube installed on both sides of a water jacket, and connected with the first bypass line and the second bypass line; a burner(7) mounted to heat the dual heater heat exchanger; an air duct(6) installed to form a heat exchange channel covering the dual heater heat exchanger and allowing air to flow therein; an outside air suction tube(61) connected to one side of the air duct to introduce fresh outside air; an outside air suction fan(72) mounted to the one side of the air duct to introduce outside air; an air damper mounted to the one side of the air duct to control suction of outside air; and a heating air discharge tube(62) connected to the other side of the air duct to supply a room with hot air having passed the heat exchange channel to be heated by heat exchange.

Description

Dual heater heating system and dual heater heat exchanger for internal combustion engine {Heating system and exchanging device of dual heater}

The present invention relates to a heating system of a dual heater for an internal combustion engine and a heat exchanger of the dual heater.

Generally, various vehicles or construction vehicles (such as excavators and cranes) using power obtained from an internal combustion engine as well as ships and aircrafts use heat of coolant circulating inside the engine to cool the engine. Is heating the room.

However, since the water temperature of the coolant does not rise to an appropriate temperature at the initial start-up, the engine cannot be heated indoors at the initial start-up.The indoor heating can only be heated after a certain time after the engine starts. It becomes possible.

For example, in the case of vehicles, it takes about 10 minutes or more for the engine's cooling water to heat up to room temperature (approximately 50 ℃ or more), based on the winter season in Korea. This may take a while.

In addition, since the engine not only reduces combustion efficiency during cold start, but also emits a lot of harmful components in the exhaust gas, the engine does not start immediately after starting the engine. There are many cases of idling, and there are many cases of idling the engine for indoor heating while the vehicle is stopped or parked for a long time. When idling the engine in this way, the harmful gas contained in the exhaust gas emitted to the muffler Since more minutes are discharged than during driving, the exhaust gas emitted during idling of the engine causes a serious problem of polluting the atmospheric environment.

Due to the above reasons, as a global trend, each country regulates the engine from idling for more than a certain time (about 2 minutes) when starting and starting the vehicle or when the vehicle is stopped or parked. Not only does engine warm-up not work properly with the engine running, but heating is not possible.

Therefore, in order to solve this problem, a vehicle equipped with an air heater that heats the room separately from the engine has been developed and is currently in use. The air heater uses less fuel than fuel consumption required to heat the room by idling the engine. The heat exchanger is heated by the burner that consumes the external cold air to be heated by heat exchange in the process of passing through the heated heat exchanger, so that only the indoor heating is possible, but the engine's cooling water cannot be heated. .

However, even if the vehicle is heated by operating the air heater while the vehicle is stopped, when the vehicle is started, the engine's coolant must be started with cold cold start, and the engine does not start immediately after cold start and the engine warms up sufficiently. It has been pointed out that the engine must be idle for a while, and the fuel is doubled because the air heater must be operated continuously until the water temperature of the engine coolant is raised to an appropriate temperature (about 50 ° C or more) to heat the room. Has been pointed out as a problem.

The present invention was created in order to solve the problems described in the prior art as described above, it is installed separately from the engine, it is installed in a structure connected to the cooling water circulation line of the engine to heat the room even when the engine is stopped. In addition to providing a heating system that can perform engine warm-up at the same time, the heat transfer effect of the burner's combustion heat to the engine water is quickly heated to the proper water temperature (30 ℃ or higher) and it is suitable. Another object of the present invention is to provide a heat exchanger having excellent heat dissipation effect such that heat of cooling water heated to water temperature makes heat exchange with external air well.

As a means for achieving the above object, the dual heater heating system of the present invention,

The engine and the cabin heater for supplying the heating air to the room, the engine and the cabin heater is connected to the cooling water supply line and the cooling water recovery line structure to cool the engine with the cooling water circulating the cooling water supply line and the recovery line, In the heat-exchanging cold air using the coolant water temperature warmed when the engine is cooled to heat the room with the heated air,

First and second bypass lines connected to the cooling water recovery line, check valves provided in the cooling water recovery line between the first and second bypass lines, and the first and second bypass lines. A preheater water pump and an air heater water pump installed in each line, and a dual heater heat exchanger having first and second inlet and outlet pipes connected to the first and second bypass lines on both sides of the water jacket. A burner mounted to heat the dual heater heat exchanger, an air duct formed to form a heat exchange passage through which air flows while surrounding the dual heater heat exchanger, and one side of the air duct introduces external fresh air External air suction tube is connected to be connected to, and the air intake 휀 mounted on one side of the air duct to control the outside air and the suction of the outside air Becomes consists of a control damper, and a heating air discharge tube in the course of passing through the other side of the heat exchange passage and the air duct for supplying hot air heated by the heat exchange action in the indoor,

If the engine is only to be heated indoors when the engine is stopped, open the air damper on the outside air inlet tube, ignite the burner to heat the dual heater heat exchanger, and simultaneously operate the water pump for the air heater to allow the coolant to bypass the second. The water jacket → second bypass line → check valve → second bypass line is repeatedly circulated from the line side, and the cooling water circulating in the water jacket of the dual heater heat exchanger is heated in a short time to inhale external air. Indoor heating means for heating by the heat exchange action in the process of passing through the heat exchange passage formed on the outer periphery of the dual heater heat exchanger to be supplied to the room through the air discharge tube for heating;

To warm up the engine only, close the air damper on the outside air intake tube, ignite the burner to heat the dual heater heat exchanger, and operate the water pump for the preheater to cool the water from the first bypass line. 2 engine warm-up means for repeatedly operating the bypass line → cabin heater → cooling water supply line → engine → cooling water recovery line → first bypass line;

In order to achieve both indoor heating and engine warm-up, the burner is ignited with the air damper on the outside air intake tube open, and the water pump for the preheater is activated to turn the engine through the water jacket of the dual heater heat exchanger. Means for performing the heating and the engine warm-up at the same time by repeating the operation to bring the;

It is characterized by consisting of,

In addition, a water pump for circulating cooling water in one of the bypass lines of the first and second bypass lines, a three-way solenoid valve is installed in the other bypass line, the three-way solenoid valve and the water pump It is a structure that connects the built-in bypass line to the third bypass line so as to selectively control the three-way solenoid valve so as to individually perform indoor heating and engine warm-up or simultaneously perform indoor heating and engine warm-up. It is characterized by.

And, the dual heater heat exchanger of the present invention,

A plurality of heat-transfer members having an annular shape having a cross-section having a “c” shape are connected in a cylindrical shape while forming a combustion chamber inside by brazing welding in a state in which a plurality of heat-transfer members are formed in a cylindrical shape, and are connected to a rear end of the plurality of heat-transfer members. A water jacket inner wall body including a rear end cylindrical body brazed and welded to a located heat transfer member;

A diffusion plate member fixed to an inner side of a combustion chamber sealing plate welded to an inner circumferential surface of a rear end cylindrical body of the water jacket inner wall body to induce combustion heat of the burner to diffuse in all directions toward the water jacket inner wall body;

A front end cylindrical body brazed and welded to the front end side heat transfer member of the inner wall of the water jacket, and having an exhaust pipe installed at one side while being formed as a cylindrical body having both sides opened to charge the combustion cylinder of the burner into the combustion chamber;

The water jacket has a larger diameter than the heat transfer members constituting the inner wall of the water jacket, and a plurality of annular heat dissipation members are connected to form a cylindrical shape, and the water is interposed with the water jacket inner wall while being brazed. A water jacket outer wall installed to form a jacket;

A first inflow and outflow pipe installed to communicate with the water jacket while being fixedly attached to one side of the front end side heat dissipation member among a plurality of heat dissipation members constituting the water jacket outer wall;

A second inflow and outflow pipe which is installed to communicate with the water jacket while being fixedly attached to one side of a rear heat dissipation member among a plurality of heat dissipation members constituting the water jacket outer wall;

It is characterized in that the

In addition, the first heat transfer to form a clearance gap to allow the inlet of the combustion heat and exhaust gas while protruding annularly toward the inside of the combustion chamber inside the plurality of heat transfer members constituting the water jacket inner wall of the dual heater heat exchanger. Each of the fins and the first heat transfer fins has a circular shape with a plurality of swirl induction pipes, which induces the combustion heat and the exhaust gas flowing into the separation gap from the rear side of the combustion chamber to move forward from the rear side of the combustion chamber. It is formed so as to, and the outer surface of the plurality of heat transfer members described above " "It is characterized in that the plurality of second heating fins are formed integrally protruding radially toward the inside of the water jacket,

In addition, a plurality of heat dissipation fins protruding radially toward the air duct surrounding the outside of the dual heater heat exchanger while being bent obliquely toward the rear of the plurality of heat dissipation members constituting the water jacket outer wall of the dual heater heat exchanger integrally. It is characterized by being formed,

In addition, the burner mounted on the dual heater heat exchanger is characterized in that the combustion cylinder extending from the burner body which is tightly fixed to the flange of the front end cylindrical body is installed in a state of being inserted 1/3 deep into the combustion chamber,

Alternatively, the dual heater heat exchanger is formed of a water jacket inner wall and a water jacket outer wall of a cylindrical shape, and a plurality of heat transfer fins protruding toward the combustion chamber are formed only on an inner surface of the water jacket inner wall, and an air is formed on an outer circumferential surface of the outer wall of the water jacket. It is characterized in that a plurality of heat radiation fins protruding toward the duct is formed.

1 to 3 is an installation state of the dual heater heating system for explaining the present invention

And a schematic diagram showing an operational state,

1 is an operating state of the indoor heating,

2 is an operation state diagram at the time of engine warm-up,

3 is an operating state diagram when the indoor heating and engine warm-up are performed at the same time.

4 is a schematic diagram of another embodiment of the dual heater heating system of the present invention.

Figure 5 is an assembled state cross-sectional view of the dual heater heat exchanger of the present invention.

6 is a heat transfer portion constituting the water jacket inner wall of the dual heater heat exchanger of the present invention.

Reextracted perspective view.

7 is a plan view of the heat transfer member constituting the water jacket inner wall of the present invention.

8 and 9 are cross-sectional views taken along line A-A and line B-B in FIG.

10 is a heat dissipation part constituting the water jacket outer wall of the dual heater heat exchanger of the present invention;

Top view of ashes.

11 is a cross-sectional view taken along the line C-C in FIG.

12 is a longitudinal sectional view of another embodiment of the dual heater heat exchanger of the present invention.

※ Explanation of code for main part of drawing

1: Dual heater heating system 2a, 2b, 2c: 1st, 2nd, 3rd bypass line

3: dual heater heat exchanger 4: preheater water pump

4a: water pump 5: water pump for air heater

5a: 3-way solenoid valve 6: air duct

7: burner 8: heat exchange passage

10: engine 11: cabin heater

12: cooling water supply line 13: cooling water recovery line

21: check valve 31: water jacket inner wall

311: heat transfer member 312: first heat transfer fin

313: second heating fin 314: swirl induction

315: clearance gap 316: swirl path

317: welding flange 32: rear end cylindrical body

33: combustion chamber 34: water jacket outer wall

341: heat dissipation member 342: heat dissipation fin

341a: front end side heat dissipation member 341b: rear end side heat dissipation member

35: water jacket 35a, 35b: first and second entry and exit pipe

36: end cylinder 37: exhaust pipe

38: combustion chamber closed plate 39: diffusion plate

61: outside air suction tube 62: heating air discharge tube

63: air damper 71: combustion air inlet

72: outside air intake 휀 73: combustion cylinder

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 is a schematic diagram showing an installation state and an operating state of a dual heater heating system for explaining the present invention, Figure 4 is a schematic diagram of another embodiment of the dual heater heating system of the present invention, Figure 5 is 6 is a cross-sectional view illustrating an assembled state of the dual heater heat exchanger, and FIG. 6 is a perspective view taken from the heat transfer member constituting the water jacket inner wall of the dual heater heat exchanger of the present invention, and FIG. 7 is a heat transfer member constituting the water jacket inner wall of the present invention. 8 and 9 are cross-sectional views taken along line AA and BB of FIG. 7, and FIG. 10 is a plan view of the heat dissipation member constituting the water jacket outer wall of the dual heater heat exchanger of the present invention, and FIG. 11 is a line CC of FIG. 9. 12 is a cross-sectional view of another embodiment of the dual heater heat exchanger of the present invention.

Reference numeral 1 denotes a dual heater heating system, wherein the dual heater heating system 1 cools an engine such as a vehicle, an aircraft, and a construction vehicle such as a crane or an excavator, as well as an automobile moving the engine (internal combustion engine) as a power source. It is applied to the cooling water circulation line installed for the purpose.

In addition, the dual heater heating system 1 is a cabin heater (11: CABIN HEATER) for heating the room using the engine 10 and the heat of the engine as shown in the drawings (Figs. 1, 2, 3). When installed in the cooling water circulation line consisting of the cooling water supply line 12 and the cooling water recovery line 13 is connected to the engine 10 through the cooling water supply line 12 to cool the engine while circulating inside the engine It is installed in a structure that is connected to the cooling water recovery line 13 to recover the cooling water warmed by the heat exchange action with the engine.

The dual heater heating system 1 includes first and second bypass lines 2a and 2b connected at different positions on the coolant recovery line 13, respectively, and the first and second bypass lines, respectively. Dual heater heat exchanger (3) is configured to warm the cooling water circulated through.

In addition, the dual heater heating system 1 includes a pre-heater water pump 4 and an air heater water pump 5 which are installed in each of the first and second bypass lines 2a and 2b. And a check valve 21 installed in the coolant recovery line 13 between the first and second bypass lines 2a and 2b.

In addition, the dual heater heating system 1 is connected to both ends of the air duct 6 and the air duct 6 which surrounds the outer circumferential surface of the dual heater heat exchanger 3 to form a heat exchange passage 8 through which air flows. The external air suction tube 61 and the heating air discharge tube 62 are included, and the burner 7 mounted to the dual heater heat exchanger 3 is also included.

One end of the air duct 6 to which the external air suction tube 61 is connected is provided with an air damper 63 for controlling the suction of external air, and between the burner 7 and the air damper 63. The external air intake fan 72 which sucks the external air through the combustion air inlet 71 for supplying combustion air to the burner and the external air intake tube 61 and blows it to the outer periphery of the dual heater heat exchanger 3 is provided. Although installed, the external air suction fan 72 may be rotated by the power of the motor mounted on the burner 7 or may be rotated by a separate power from the burner 7.

In addition, the dual heater heating system 1 of the present invention may be configured as shown in the example of FIG. In the embodiment of Fig. 4, a water pump 4a for pumping and forcibly circulating the cooling water is installed in the first bypass line 2a, and a control device (not shown) is provided in the second bypass line 2b. The 3-way solenoid valve 5a is installed to automatically change the flow direction of the coolant according to the signal of the electronic automatic control device of the vehicle, and the 3-way solenoid valve 52 and the water pump 4a are installed. A third bypass line 2c for connecting the first bypass line 2a is provided.

Next, the configuration of the dual heater heat exchanger 3 will be described.

The water jacket inner wall 31 of the dual heater heat exchanger 3 is brazed and welded in a state in which a plurality of heat transfer members 311 having an annular shape are formed in a cylindrical shape with a cross-section having a substantially "c" shape. The water jacket inner wall 31 includes a rear end cylindrical body 32 on which the open end of the small diameter portion 321 is welded.

Each of the plurality of heat transfer members 311 constituting the water jacket inner wall 31 has a first heat transfer fin 312 protruding toward the inside of the combustion chamber 33 and a radial direction toward the inside of the water jacket 34. A plurality of protruding second heat transfer fins 313 and a plurality of swirl guide holes 314 are formed on the side of the first heat transfer fins 312 to form a circle.

The first heat transfer fins 312 in the above are a plurality of gaps 315 and swirl passages 316 are formed between the neighboring ones in the state opened toward the rear of the combustion chamber 33, and the plurality of Swirl induction hole 314 of each of the two side opening protrusion pieces 317, 318 are formed to be inclined while tearing in the opposite direction to each other, the opening side pieces are inclined toward the same direction. Therefore, the plurality of swirl induction holes 314 formed on the first heat transfer fins 312 of each of the heat transfer members 311 are all formed to be inclined toward the same direction (clockwise or counterclockwise).

In addition, each of the plurality of second heat transfer fins 313 radially formed on each of the plurality of heat transfer members 311 is bent in opposite directions to each other in the circumferential direction. That is, the second heat transfer fins 313 are all the same when referring to the circumferential direction. "It has a bent structure.

The water jacket outer wall 34 of the dual heater heat exchanger 3 has a diameter slightly larger than the outer diameter of the second heat transfer fin 313 radially formed on the heat transfer member 311 constituting the water jacket inner wall 31. While a plurality of heat dissipation members 341 formed in a circular shape are brazed and cylindrical in a state of being connected to form a cylinder, each of the plurality of heat dissipation members 341 is radially outward while maintaining a predetermined interval. A plurality of heat dissipation fins 342 are formed to protrude toward the plurality of heat dissipation fins 342, all of which are directed toward the same direction. "It has a bent structure.

Further, among the plurality of heat dissipation members 341 forming the water jacket outer wall 34, the front end side heat dissipation member 341a and the rear end side heat dissipation member 341b are a plurality of heat dissipation members 341 formed therebetween. It is formed with a longer length in the axial direction than the field, and the first inlet and outlet pipe 35a is fixed to one side of the front end side heat radiation member (341a) having such a long length by welding, the rear end side heat radiation member (341b) On one side of the second entry and exit pipe 35b is fixedly installed by welding.

Meanwhile, the water jacket inner wall 31 and the water jacket outer wall 34 are connected to their front and rear ends in a sealed state, and the rear ends of the water jacket inner wall 31 and the water jacket outer wall 34, respectively. In this case, the large diameter portion 322 of the rear end cylindrical body 32 welded to the rear end of the water jacket inner wall body 31 and the rear end side heat dissipation member 341b of the water jacket outer wall 34 are welded in a state where they overlap each other. In the case of the front end of each of the water jacket inner wall 31 and the water jacket outer wall 34, the heat transfer member 311 and the water jacket outer wall 34, which are located at the front end of the water jacket inner wall 31, are connected to each other. Of the heat dissipation member 341a of the front end is connected to the welded structure. To this end, in the case of the heat transfer member 311 assembled and connected to the front end side of the water jacket inner wall body 31, a welding flange 317 having an annular shape is formed on the outer periphery of the heat transfer member, and the welding flange 317 is formed. ) Is connected to the inner circumferential surface of the tip-side heat dissipation member 341a of the water jacket outer wall body 34.

In addition, a cylindrical end portion cylindrical body 36 is welded to the front end of the dual heater heat exchanger 3, and an exhaust pipe 37 for discharging exhaust gas is provided at one side of the front end cylindrical body 36. Formed.

On the other hand, a burner 7 is mounted on the front end cylinder 36 of the dual heater heat exchanger 3 configured as described above, and the combustion cylinder 73 of the burner 7 is moved into the combustion chamber 33. It is installed in the inserted state, the combustion cylinder 73 is installed in a state inserted into the depth of about 1/3 at the front end of the combustion chamber 33, and also in the rear of the dual heater heat exchanger (3) The combustion chamber hermetic plate 38 welded to the small diameter part 321 of the rear-end cylindrical body 32, and the diffuser plate material 39 which were fixed to the inner surface side as a bolt or rivet structure are provided, respectively.

The diffusion plate material 39 is formed as a heat-resistant steel sheet in a curved shape so that the heat of combustion of the burner 6 is formed by the plurality of first heat transfer fins 312 formed on the inner wall 31 of the water jacket and formed by them. The separation gap 315 and the swirl passage 316 is configured so that the diffusion can be made well.

In addition, the dual heater heat exchanger 3 of the present invention, as shown in FIG. 12, has a single-cylindrical cylindrical water jacket inner wall 31a and a single-cylindrical cylindrical water jacket outer wall 34a. The water jacket 35 is assembled in a dual structure to form, and in the case of the water jacket inner wall 31a, a plurality of heat transfer fins 312a protruding toward the combustion chamber 33 are formed only on the inner surface thereof. In the case of the water jacket outer wall 34a, a plurality of heat dissipation fins 342a protruding toward the air duct 8 are formed. The heat fins 321a and the heat dissipation fins 342a are formed in a cylindrical water jacket inner and outer walls. It has a structure that protrudes in a straight line in the longitudinal direction.

The operation of the dual heater heat exchanger in the present invention configured as described above will be described.

First, the case of the embodiment illustrated in FIGS. 5 to 11 will be described. When the burner 7 mounted on the dual heater heat exchanger 3 is ignited, the combustion cylinder 73 inserted into the combustion chamber 33 is ignited. The ignited combustion flame heats the combustion chamber 33, whereby the heat of combustion of the combustion flame is generated by the fuel injection force of the combustion cylinder 73, and a plurality of first formed at the rear side of the combustion chamber 33 from the end of the combustion cylinder 73. The heating fins 312 are in a state of directly heating, and the combustion flame injected into the combustion cylinder 73 hits the diffusion plate 39 installed behind the combustion chamber 33 by the injection force of the burner 7 in all directions. As the diffusion heats the first heat transfer fin 312, and the combustion heat and the exhaust gas of the combustion flame injected from the combustion vessel 73 as described above are a plurality of first heat transfer fins 312 formed in the combustion chamber 33. Into the swirl passage 316 through the gap 315 formed between the), Thus, the heat of combustion and the exhaust gas which flowed into the swirl passage 316 move toward the tip side cylindrical body 35 through the swirl induction holes 314 which are formed in the circumferential direction in the circumferential direction on the swirl passage 316. Since both of the opening protrusion pieces 317 and 318 forming the swirl induction holes 314 are all formed to be inclined toward one direction, the heat of combustion and exhaust gas passing through the swirl induction hole 314 are both sides. It moves in an inclined direction, that is, rotated toward one side by the opening protrusion pieces 317 and 318, and accordingly, in front of the combustion chamber 33 through the swirl passage 316 on the rear side of the combustion chamber 33. Combustion heat and exhaust gas moving toward the front end cylindrical body 35 of the swirl passage in the swirl passage 316, so that the first heat transfer fins 312 have a long contact time with the combustion heat and exhaust gas within a short time Floating It shows the feature of being heated.

As the plurality of first heat transfer fins 312 are heated as described above, the heat is transferred to the water jacket inner wall 31 and simultaneously to the plurality of second heat transfer fins 313 protruding into the water jacket 35. As it is transmitted, the cooling water stored in the water jacket 35 is heated. Each of the plurality of second heat transfer fins 313 protruding into the water jacket 35 has a circumferential direction of the water jacket inner wall 31. Both ends are bent in opposite directions " Since the coolant circulating in the water jacket 34 flows while rotating the water jacket inner wall 31 in a spiral manner by the second heat transfer fins 313, the heat exchange action is increased. For example, when the coolant is introduced into the water jacket 35 through the first inlet and outlet pipe 35a, the cooling water introduced into the water jacket 35 is discharged to the second inlet and outlet pipe 35b. The heat exchange effect between the wall 31 and the plurality of second heat transfer fins 313 is improved, so that it can be expected to be heated to a desired water temperature within a short time.

In addition, as described above, the heat of the cooling water heated in the water jacket 35 includes a plurality of heat dissipation members 341 forming the water jacket outer wall 34 and a plurality of heat dissipation fins radially projecting at a predetermined interval on the outer circumference thereof. The plurality of heat dissipation members 341 and the plurality of heat dissipation fins 342 formed on the outer circumferences of the heat dissipation members 341 are also heated in a short time to be transferred to the heat dissipation paths 8 formed by the air duct 6. Heat exchange with the air flowing in, each of the plurality of heat dissipation fins 342 are each bent in the same circumferential direction in the circumferential direction, so the air flowing in the flow space 8 is inclined bent portion of the plurality of heat dissipation fins 342 Due to the movement in the heat exchange passage 8 rotates in one direction, the heat exchange time between the water jacket outer wall 34 and the plurality of heat dissipation fins 342 is long, so that the difference introduced through the outside air suction tube 61 is increased. It is heated while air is passed through a heat exchange passage (8) is discharged to the heating of the air discharge tube 62.

In the case of the embodiment shown in FIG. 12, the heat transfer fins 312a formed on the inner surface of the water jacket inner wall 31a, which also constitute the dual heater heat exchanger 3, are in direct contact with the combustion flame of the burner 7. The heated heat is transferred to the cooling water circulating in the water jacket 35, and the water temperature of the cooling water circulating in the water jacket 35 is applied to the water jacket outer wall 34 and the heat radiation fins 342a formed on the outer circumferential surface thereof. As it delivers, the action of heating the air passing through the heat exchange passage 8 can be expected. However, in this embodiment, the cooling water swirls in the water jacket 35 and the combustion heat of the combustion flame of the burner 7 swirls in the heat chamber 33 and the air passes through the air duct 6. Since it cannot be expected to swirl, the heat exchange effect is slightly inferior to the dual heater heat exchanger of the above-described embodiment, but the manufacturing of the dual heater heat exchanger is easy, and thus the manufacturing cost of the heat exchanger is reduced.

Next, the operation of the dual heater heating system of the present invention.

In the present invention, the dual heater heating system 1 is configured to operate automatically by an electronic automatic control device when the corresponding switch of the heating system control device mounted in the cab (or steering room, control room, etc.) is operated. A detailed description of the electronic automatic control device and the selection switch will be omitted.

First, referring to the embodiment shown in FIGS. 1 to 3, when only the indoor heating is to be performed while the engine 10 is not operated, the air damper 63 of the external air intake tube 61 is opened. Ignite the burner (7) and operate the water pump (5) for the air heater.

The burner 7 ignited as described above heats the dual heater heat exchanger 3 in a short time as described above, and the water pump 5 for the air heater installed in the second bypass line 2b is a coolant. The cooling water is introduced into the water jacket 35 through the second inlet and outflow pipe 35b of the dual heater heat exchanger 3, and the cooling water introduced into the water jacket 35 is pumped circulating. The first bypass line through the first inlet and outlet pipe (35a) while being heated by heat exchange action in the process of moving toward the first inlet and outlet pipe (35a) while rotating the inside of the water jacket (35) formed in a cylindrical shape by round 2a) is circulated to the coolant recovery line 13, wherein the coolant flowing into the coolant recovery line 13 does not flow toward the engine 10 by the resistance of the stopped engine 10 and toward the check valve 21. Flows through the check valve 21 Water is flowed into the second bypass line (2b) does not flow into the cabin heater 11 by the pumping operation of the air heaters, the water pump (5).

Therefore, when the water heater 5 for the air heater is operated while the engine 10 is stopped, the coolant is the water pump 5 for the air heater → the second inlet / outlet pipe as shown in the arrow direction in FIG. 35b) → water jacket 35 → first inlet / outlet pipe 35a → first bypass line 2a → check valve 21 → second bypass line 2b. Repeated circulation of the first and second bypass lines 2a and 2b can maximize the thermal efficiency of the heated coolant by heat exchange with the dual heater heat exchanger 3, thereby dissipating heat from the dual heater heat exchanger 3. The effect can be enhanced.

Therefore, the external cold air introduced into the heat exchange passage 8 between the air duct 6 and the dual heater heat exchanger 3 through the external air suction tube 61 is heated outside the wall of the dual heater heat exchanger 3 and The heat dissipation fin 342 is in contact with the heat dissipation. The plurality of heat dissipation fins 342 are bent inclined toward one side, so the air flowing into the heat exchange passage 8 hits the heat dissipation fin 342 in one direction. The heat exchange action is performed well as it moves while rotating, so that the air flowing into the heat exchange passage 8 is sufficiently warmed while passing through the heat exchange passage 8, and is sufficiently warmed in the heating air discharge tube 62. It will release the air to heat the room.

Next, when the engine warm-up is to be performed while the engine 10 is stopped, the air damper 63 operates the burner 7 and the water heater 4 for the preheater in a closed state.

When the water heater 4 for the preheater is operated, the coolant in the coolant recovery line 13 connected to the engine 10 is transferred from the second bypass line 2a to the first inlet / outlet pipe 35a to the water jacket 35. ), The second inlet / outlet pipe (35b), the second bypass line, the cabin heater (11), the cooling water supply line, the engine (10), and flow back to the cooling water recovery line (13), and the operation of the burner (7). By the cooling water circulating in the water jacket 35 of the dual heater heat exchanger (3) is circulated in the engine 10 in a state where the heat is heated by the heat exchange action is to make the engine warm-up.

Next, when the engine warm-up and room heating are to be performed simultaneously with the engine 10 stopped, the water heater 4 and the burner 7 for the preheater are operated while the air damper 63 is opened.

When the water heater 4 for the preheater is operated, the coolant is supplied to the second bypass line 2a, the first inlet and outlet pipe 35a, the water jacket 35, and the second inlet and outlet pipe as in the engine warm-up. 35b) → the second bypass line → the cabin heater (11) → the cooling water supply line → the engine (10) flows back to the cooling water recovery line (13) to stop the engine (10) dual heater heat exchanger (3) Circulating the coolant heated by the heat exchange action to warm up the engine, and at the same time, the external air introduced through the external air intake tube 61 is the same as the above-described indoor heating. It is warmed while passing through the heat exchange passage 8 formed between the air (3) is discharged to the heating air discharge tube 62 to heat the room.

In addition, the embodiment shown in Figure 4 by selectively operating the operation switch of the dual heater heating system (1) installed in the cab to automatically control the three-way solenoid valve (5a) to set the flow direction of the coolant and simultaneous air As a means for setting the damper 63 opening and closing operations, not only the indoor heating and the engine warm-up can be selected, but also the indoor heating and the engine warm-up can be performed at the same time. For example, when the air damper 63 is opened and the 3-way solenoid valve 5a is operated to circulate the coolant into the third bypass line 2c, the coolant circulated by the pumping operation of the water pump 4a is removed. 1 Bypass line (2a) → 1st inlet / outlet (35a) → Water jacket (35) → 2nd inlet / outlet (35b) → 2nd bypass line (2b) → 3 way solenoid valve (5a) → 3rd bypass Since the pass line 2c is repeatedly circulated, the cooling water can be heated to an appropriate temperature required for indoor heating in a short time.

According to the present invention as described above, the engine is stopped by means of installing a dual heater heating system on the coolant return line between the engine and the cabin heater to heat the coolant with much less fuel than the fuel required to operate the engine. Not only can the room be heated in a closed state, but it also has the effect of selectively performing engine warm-up, and it also provides the effect of performing both indoor heating and engine warm-up at the same time. And it is a useful invention that can provide an effect that the heating and engine warm-up can be automatically performed even when the engine is stopped when the timer circuit device to automatically make the engine warm-up.

Claims (5)

The engine and the cabin heater for supplying the heating air to the room, the engine and the cabin heater is connected to the cooling water supply line and the cooling water recovery line structure to cool the engine with the cooling water circulating the cooling water supply line and the recovery line, In the cooling water temperature warmed when the engine is cooled to heat the outside cold air heat configured to heat the room, First and second bypass lines connected to the cooling water recovery line, check valves provided in the cooling water recovery line between the first and second bypass lines, and the first and second bypass lines. A preheater water pump and an air heater water pump installed in each line, and a dual heater heat exchanger having first and second inlet and outlet pipes connected to the first and second bypass lines on both sides of the water jacket. A burner mounted to heat the dual heater heat exchanger, an air duct formed to form a heat exchange passage through which air flows while surrounding the dual heater heat exchanger, and one side of the air duct introduces external fresh air External air suction tube is connected to be connected to, and the air intake 휀 mounted on one side of the air duct to control the outside air and the suction of the outside air An air damper, and the other side of the air duct is composed of a heating air discharge tube for supplying the hot air heated by the heat exchange action in the course of passing through the heat exchange passage, If the engine is only to be heated indoors when the engine is stopped, open the air damper on the outside air inlet tube, ignite the burner to heat the dual heater heat exchanger, and simultaneously operate the water pump for the air heater to allow the coolant to bypass the second. The water jacket → second bypass line → check valve → second bypass line is repeatedly circulated from the line side, and the cooling water circulating in the water jacket of the dual heater heat exchanger is heated in a short time to inhale external air. Indoor heating means for heating by the heat exchange action in the process of passing through the heat exchange passage formed on the outer periphery of the dual heater heat exchanger to be supplied to the room through the air discharge tube for heating; To warm up the engine only, close the air damper on the outside air intake tube, ignite the burner to heat the dual heater heat exchanger, and operate the water pump for the preheater to cool the water from the first bypass line. 2 engine warm-up means for repeatedly operating the bypass line → cabin heater → cooling water supply line → engine → cooling water recovery line → first bypass line; In order to achieve both indoor heating and engine warm-up, the burner is ignited with the air damper on the outside air intake tube open, and the water pump for the preheater is activated to turn the engine through the water jacket of the dual heater heat exchanger. Means for performing the heating and the engine warm-up at the same time by repeating the operation to bring the; Dual heater heating system for an internal combustion engine, characterized in that made. The method of claim 1, A water pump for circulating cooling water is installed in one of the bypass lines of the first and second bypass lines, and a 3-way solenoid valve is installed in the other bypass line, and the 3-way solenoid valve and the water pump are installed. It is a structure that connects the bypass line to the third bypass line, and the means for selectively controlling the 3-way solenoid valve to individually perform indoor heating and engine warm-up, or to simultaneously perform indoor heating and engine warm-up. Dual heater heating system for an internal combustion engine. In the heat exchanger which a burner and a combustion chamber are comprised, A plurality of heat-transfer members having an annular shape having a cross-section having a “c” shape are connected in a cylindrical shape while forming a combustion chamber inside by brazing welding in a state in which a plurality of heat-transfer members are formed in a cylindrical shape, and are connected to a rear end of the plurality of heat-transfer members. A water jacket inner wall body including a rear end cylindrical body brazed and welded to a located heat transfer member; A diffusion plate member fixed to an inner side of a combustion chamber sealing plate welded to an inner circumferential surface of a rear end cylindrical body of the water jacket inner wall body to induce combustion heat of the burner to diffuse in all directions toward the water jacket inner wall body; A front end cylindrical body brazed and welded to the front end side heat transfer member of the inner wall of the water jacket, and having an exhaust pipe installed at one side while being formed as a cylindrical body having both sides opened to charge the combustion cylinder of the burner into the combustion chamber; The water jacket has a larger diameter than the heat transfer members constituting the inner wall of the water jacket, and a plurality of annular heat dissipation members are connected to form a cylindrical shape, and the water is interposed with the water jacket inner wall while being brazed. A water jacket outer wall installed to form a jacket; A first inflow and outflow pipe installed to communicate with the water jacket while being fixedly attached to one side of the front end side heat dissipation member among a plurality of heat dissipation members constituting the water jacket outer wall; A second inflow and outflow pipe which is installed to communicate with the water jacket while being fixedly attached to one side of a rear end side heat radiation member among the plurality of heat radiation members constituting the water jacket outer wall; An air duct formed between the water jacket outer wall and an air duct connected at both ends to an external air suction tube and a heating air discharge tube; Dual heater heat exchanger for an internal combustion engine, characterized in that it comprises a dual heater heat exchanger. The method of claim 3, wherein The first heat transfer fins which form a gap between the heat transfer members constituting the water jacket inner wall of the dual heater heat exchanger to form a clearance gap to allow inflow of combustion heat and exhaust gas to each other while protruding annularly toward the inside of the combustion chamber. Each of the first heat transfer fins includes a plurality of swirl guides and a plurality of heat transfer members for inducing combustion heat and exhaust gas flowing into the separation gap from the rear side of the combustion chamber to be swirled toward the front side. A plurality of second heat transfer fins protruding radially toward the inside of the water jacket is integrally formed on the outside, and an air duct surrounding the outside of the dual heater heat exchanger on the outside of the plurality of heat dissipating members constituting the water jacket outer wall. A plurality of heat dissipation fins protruding radially toward the body is characterized in that formed Dual heater heat exchanger for smoke pipes. The method of claim 3, wherein The water jacket inner wall of the dual heater heat exchanger is formed in a cylindrical shape with a plurality of heat sink fins protruding toward the combustion chamber, and the water jacket outer wall is formed in a cylindrical shape with a plurality of heat sink fins protruding toward the air duct. Dual heater heat exchanger for an internal combustion engine, characterized in that.