TWI576490B - A thermosiphon type of roof heat dissipation device - Google Patents

Description

Thermosiphon roof heat sink

The present invention relates to a heat sink, and more particularly to a thermosiphon roof heat sink suitable for use on a roof of a building.

Taiwan's location in the subtropical zone, coupled with the impact of global warming, has caused local high temperatures to hit new highs. At this time, when buildings are exposed to strong sunlight, it is easy to absorb and accumulate strong solar radiant heat, which is not only difficult during the day. At night, the roof still emits accumulated radiant heat, and it takes a long time to dissipate heat. Therefore, in order to keep the room at a comfortable temperature, it is necessary to extend the use time of the air-conditioning, and the goal of energy saving and carbon reduction cannot be achieved.

In the case of Tin House, it is widely used in factories, schools and even farmhouses because of its convenient construction. However, its metal structure is more likely to accumulate hot air indoors. Therefore, in order to solve the problem of hot indoors in the iron house, Commonly used methods include the installation of insulation, sprinkler cooling, and exhaust ventilation. The heat insulation effect added to the iron house is limited. It can only suppress the temperature rise in the room for a short time. It does not discharge the hot air inside the iron house. When the iron house is exposed to strong sunlight for a period of time, it will still accumulate heat. And make the temperature rise. Sprinkling water is to use a sprinkler to directly pour water on the roof of the iron house to reduce the temperature of the metal tin house. Although this can reduce the temperature, the sunshine is continuous and the water consumption is huge. And the power consumption of the sprinkler system is also a cost that cannot be ignored for consumers, so it is difficult to implement it universally.

The other is to install exhaust ventilation equipment on the roof of the iron house to generate air convection by using the indoor temperature difference to discharge the indoor hot air. Although it is not necessary to use electric power to rotate, the rotating bearing portion is easily damaged by moisture, and when the rotation speed is too slow, the hot air inside the house cannot be discharged, and the overall volume of the exhaust ventilation device is large, and the installation is performed. It is easily damaged by the wind on the roof, and its durability is not high.

Referring to Fig. 1, there is a "Solar Roof Ventilation Device" of the Republic of China No. M297974, which discloses an unpowered ventilation device installed on a roof 2, the solar roof ventilation device 1 comprising a ventilation cover 11, a The heat sink 12, at least one heat pipe 13, and a heat absorbing plate 14. The ventilating cover 11 is a rectangular hollow casing disposed on the roof 2. The heat dissipating body 12 is disposed in the venting cover 11 and includes a plurality of fins 121 having a heat releasing end 131 and a heat absorbing end. The end 132 is disposed on the hood 11 and the heat sink 12 in a U-shaped shape, and the heat absorbing plate 14 is laid on one side of the roof 2 and has a heat absorbing surface. 141.

The heat absorbing plate 14 is made of a material having heat absorbing properties. The front surface of the heat absorbing plate 14 is covered with a black paint to accelerate the heat absorbing rate of the heat absorbing plate 14. Therefore, when the heat absorbing plate 14 absorbs solar heat energy, the heat absorbing plate 14 The tube 13 is conducted to the heat dissipating body 12 to increase the temperature of the heat dissipating body 12, and at the same time, the hot air rises and forces the indoor air to flow to achieve indoor and outdoor ventilation.

The above-mentioned solar roof ventilation device has the following disadvantages when it is actually implemented:

First, poor durability

It is conventional to install the solar roof ventilation device 1 on the roof 2 so that the space inside and outside the roof 2 is in a connected state to drive a large amount of hot air concentrated inside the roof 2 to flow outward to reduce the house. The inside is sultry, but after a period of use, the rainwater is easily infiltrated into the house by the solar roof ventilator 1 and the roof 2, and maintenance work is required, resulting in poor durability.

Second, the structure is complex and costly

Although the conventional method can achieve the effect of indoor and outdoor ventilation, but due to the different construction methods and materials used by the construction personnel, it will directly affect the ventilation effect. Moreover, the structure must go through complicated construction procedures, which will increase the construction. The cost cannot be universally promoted in the market to provide users with a design that is affordable.

Third, can not isolate the heat source

Although it is designed for powerless ventilation, it only provides air circulation to avoid hot air accumulating indoors, and it can not effectively isolate the heat source of sunlight into the room. When the hot summer season comes, the indoor temperature is still high. And directly affect the quality and comfort of people living.

All of the above shortcomings have revealed various problems arising from the use of conventional solar roof ventilation devices. For example, it is possible to design an effective isolation of solar heat source into the room to achieve the effect of energy saving and carbon reduction, and to develop a design with simple structure and convenient construction. It can increase the willingness of the general public to use, and thus enhance the competitiveness in the market.

Accordingly, it is an object of the present invention to provide a thermosiphonic roof heat sink suitable for use on a roof of a building and including a plurality of heat sink units.

Each of the heat dissipating units includes a first heat pipe disposed on the roof, a second heat pipe vertically disposed on the middle portion of the first heat pipe, and a plurality of heat dissipation fins formed on the second heat pipe, the first heat pipe The first and second heat pipes communicate with each other to form a heat dissipation space, and have a working fluid filled in the heat dissipation space.

Another technical means of the present invention is that each of the heat dissipating units further includes a plurality of first connecting tubes connected between the adjacent two first heat pipes and communicating with the first heat pipes for improving the heat dissipation efficiency of the roof. .

Another technical means of the present invention is that each of the heat dissipating units further includes a plurality of second connecting tubes connected between the adjacent two second heat pipes and communicating with the second heat pipes for improving the heat dissipation efficiency of the roof. .

According to still another aspect of the present invention, a cold air outdoor unit is disposed outside the building, and the cold air outdoor unit includes a cold air heat pipe connected to the first heat pipe.

Another technical means of the present invention is that a cold air outdoor unit is disposed outside the building, and the cold air outdoor unit includes a cold air heat pipe connected to the first connecting pipe.

Another technical means of the present invention is that the air conditioner outdoor unit further includes a valve connected between the cold air heat pipe and the first heat pipe, and a device disposed in the building for controlling whether the valve is connected or not. The switch, when the valve is connected, is used to reduce the temperature at which the outdoor unit of the cold air is operated.

According to still another aspect of the present invention, the first and second heat pipes and the first and second connecting pipes are substantially flat tubes, and the adjacent first heat pipes are disposed in parallel.

Another technical means of the present invention is that the working fluid is selected from the group consisting of water, methanol, potassium, sodium, indium, cesium, lithium, cesium, mercury, wood alcohol, acetone, cryogen, liquid nitrogen, liquid oxygen, And the combination of these.

Another technical means of the present invention is that the materials of the first and second heat pipes and the first and second connecting pipes are selected from the group consisting of copper, nickel, stainless steel, tungsten, and the like.

According to still another technical means of the present invention, each of the heat dissipation fins is disposed around the circumference of the second heat pipe.

The beneficial effect of the invention is that when the roof of the building is exposed to sunlight to generate high temperature, the first heat pipe laid on the roof conducts thermal energy into the second heat pipe by the working fluid therein, The second heat pipe heats the heat and the outside air by the plurality of heat radiating fins Exchanging, the working fluid located in the second heat pipe is condensed and dripped downwards to form an uninterrupted evaporative condensation cycle to reduce the roof temperature of the building and effectively isolate the heat source of sunlight from the outdoors. In addition, the living comfort of the room can be improved, and the use time of the air-conditioning can be reduced, and the goal of energy saving and carbon reduction can be achieved. Moreover, since the overall structure is simple and no additional components are needed, the construction cost and time can be effectively reduced, thereby improving the market. Competitiveness.

5‧‧‧Buildings

51‧‧‧ Roof

52‧‧‧Air-conditioning outdoor unit

521‧‧‧Air-cooling heat pipe

522‧‧‧ Valve

523‧‧‧ switch

7‧‧‧Heat unit

70‧‧‧heating space

71‧‧‧First heat pipe

711‧‧‧Working fluid

72‧‧‧second heat pipe

73‧‧‧Heat fins

74‧‧‧First connecting pipe

75‧‧‧Second connection tube

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a side elevational view showing a solar roof ventilation device of the new Taiwan No. M297974; Figure 2 is a perspective view showing a first preferred embodiment of the thermosyphon roof heat dissipation device of the present invention; A partial schematic view showing a state of a heat dissipating unit in the first preferred embodiment; and FIG. 4 is a side elevational view showing a second preferred embodiment of the thermosyphon type roof heat dissipating device of the present invention.

The details of the related patents and the technical contents of the present invention will be apparent from the following detailed description of the preferred embodiments of the accompanying drawings.

It should be noted that, before the detailed description, similar elements are denoted by the same reference numerals.

Referring to Figures 2 and 3, a first preferred embodiment of the thermosiphonic roof heat sink of the present invention is suitable for mounting on a roof 51 of a building 5, and the shape of the roof 51 may be a ridge having a ridge. The house or flat-top concrete structure, the thermosyphon roof heat sink comprises a plurality of heat dissipating units 7.

Specifically, the plurality of heat dissipation units 7 are installed. The manner of attachment to the roof 51 of the building 5 is understood by those of ordinary skill in the art, and the details of the connection between the plurality of heat dissipating units 7 and the roof 51 are not shown here.

Each of the heat dissipation units 7 includes a first heat pipe 71, a second heat pipe 72, a plurality of heat dissipation fins 73, a plurality of first connection pipes 74, and a plurality of second connection pipes 75.

The first heat pipe 71 is laid on the roof 51 in parallel, and the second heat pipe 72 is vertically disposed on the middle portion of the first heat pipe 71, and the first and second heat pipes 71 and 72 are connected to each other. A heat dissipation space 70 is formed and has a working fluid 711 filled in the heat dissipation space 70.

Wherein, the working fluid 711 is selected from the group consisting of water, methanol, potassium, sodium, indium, cesium, lithium, cesium, mercury, wood alcohol, acetone, a refrigerant, liquid nitrogen, liquid oxygen, and the like. In actual implementation, the working fluid 711 of different compositions can be selected according to the needs of the user, and should not be limited thereto.

The plurality of heat dissipation fins 73 are formed on the second heat pipe 72. In the first preferred embodiment, each of the heat dissipation fins 73 is circumferentially disposed on the periphery of the second heat pipe 72 for adding the second heat pipe. The heat dissipation area of 72 increases the heat dissipation efficiency.

The plurality of first connecting pipes 74 are respectively connected between the adjacent two first heat pipes 71 and communicate with the first heat pipes 71, and are also laid on the roof 51 in parallel to promote the adsorption of the roof. 51 The heat dissipation area of the high temperature that is exposed to sunlight. Thus, by the first heat pipe 71 disposed on the roof 51 in a crisscross manner and the first connecting pipe 74, the unintended benefit of strengthening the structure of the roof 51 can be achieved.

The plurality of second connecting tubes 75 are respectively connected between the adjacent two second heat pipes 72 and communicate with the second heat pipes 72. Through the plurality of second connecting pipes 75, the second heat pipes with higher temperature can be connected. 72, the conduction is dispersed into the adjacent second heat pipe 72 to improve the heat dissipation efficiency of the roof 51.

In the first preferred embodiment, the first and second heat pipes 71 and 72 and the plurality of first and second connecting pipes 74 and 75 are made of copper, nickel, stainless steel, tungsten, and the like. . The first and second heat pipes 71 and 72 and the plurality of first and second connecting pipes 74 and 75 made of a metal material can accelerate the heat conduction speed, and the heat dissipation space 70 makes the first and second heat pipes 71 and 72 and the The plurality of first and second connecting pipes 74, 75 are substantially hollow, and the overall weight can be greatly reduced.

Furthermore, the first and second heat pipes 71 and 72 and the first and second connecting pipes 74 and 75 are substantially flat tubes, and the adjacent first heat pipes 71 are arranged in parallel and pass through the flat tubes. The body design not only increases the contact area of the first heat pipe 71 and the first connecting pipe 74 on the roof 51, but also enhances the heat absorption of the roof 51, and facilitates the fixing of the first heat pipe 71 by an engineering personnel. Construction work with the first connecting pipe 74 on the roof 51.

Since the overall structure of the plurality of heat dissipating units 7 is simple, no additional components are required, which not only simplifies the production operation of the factory, but also effectively reduces the construction cost and time, and provides a user with an inexpensive design.

When the roof 51 of the building 5 is exposed to sunlight to generate a high temperature, the first heat pipe 71 laid on the roof 51 and the plurality of first connecting pipes 74 conduct heat energy to the working fluid 711 therein. In the second heat pipe 72, the second heat pipe 72 further exchanges heat energy with the outside air by the plurality of heat dissipation fins 73, so that the working fluid 711 located in the second heat pipe 72 condenses and drops downward, thereby further An uninterrupted evaporative condensation cycle is formed to reduce the temperature of the roof 51 of the building 5, so that the heat source that can effectively isolate the sunlight enters the room, avoiding the indoor sultry environment and affecting the quality and comfort of the living. Reduce the use of air-conditioning to achieve the goal of energy saving and carbon reduction.

Because the earth orbits around the sun, the sun source that illuminates the earth has different position changes every hour. When the sunlight changes the direction of illumination, the first heat pipe 71 placed on the roof 51 and The thermal energy of the plurality of first connecting pipes 74 is not uniform. At this time, the second heat pipe 72 having a higher temperature can be dispersed into the adjacent second heat pipes 72 through the plurality of second connecting pipes 75, and then borrowed. The heat radiating fins 73 exchange heat energy with the outside air to conform to different sunlight irradiation directions, thereby achieving the purpose of rapidly reducing the temperature of the roof 51 all around the clock.

Referring to FIG. 4, a second preferred embodiment of the thermosiphonic roof heat sink of the present invention is substantially the same as the first preferred embodiment, and the same points are not described herein again. The outside of the building 5 is provided with a cold air outdoor unit 52, and the cold air outdoor unit 52 includes a cold air heat pipe 521, a valve 522, and a switch 523.

The cold air heat pipe 521 is connected to the first heat pipe 71. The valve 522 is connected between the cold air heat pipe 521 and the first heat pipe 71, and the switch 523 is disposed in the building 5 for Controlling whether the valve 522 is connected or not, when the valve 522 is in communication, the operating temperature of the cold air outdoor unit 52 can be lowered, so that the cold air outdoor unit 52 can achieve the effect of forced heat convection.

In actual implementation, the cold air heat pipe 521 can be selectively connected to the first heat pipe 71 or the first connecting pipe 74 according to the user's demand, so that the heat energy of the cold air heat pipe 521 is transmitted through the first heat pipe 71. Or the working fluid 711 in the first connecting pipe 74 is conducted into the second heat pipe 72, so that the cold air outdoor unit 52 lowers the operating temperature, thereby improving the operating efficiency.

It can be seen from the description of the above preferred embodiments that the thermosyphon roof heat sink of the present invention does have the following enhancements:

First, there is no need to destroy the structure of the roof 51

The first heat pipe 71 and the first connecting pipe 74 are directly laid on the roof 51 in parallel, without the need to dig the connection space between the roof 51 and the heat sink, thereby reducing indoor water seepage and damage to the roof. 51 structure troubles.

Second, the structure is simple and can reduce construction cost and time

The plurality of heat dissipating units 7 are composed of the first and second heat pipes 71 and 72 and the plurality of first and second connecting pipes 74 and 75, so that the overall structure is simple and no additional components are needed, which facilitates the production operation of the factory and the construction of the engineering personnel. The work can effectively reduce the construction cost and time, and provide the user with a cheap design.

Third, effective isolation of heat sources

The first heat pipe 71 and the working fluid 711 in the plurality of first connecting pipes 74 conduct heat energy to the second heat pipe 72, and the heat is exchanged with the outside air by the plurality of heat radiating fins 73. The temperature of the roof 51 of the building 5 can be lowered to effectively isolate the heat source of the sunlight from the outside, thereby improving the comfort of living in the room, reducing the use time of the air-conditioning, and achieving the goal of energy saving and carbon reduction.

In summary, the thermosyphon type roof heat dissipating device of the present invention mounts the plurality of heat dissipating units 7 on the roof 51 of the building 5, and the first heat pipe 71 disposed on the roof 51 by criss-crossing The first connecting pipe 74 achieves the effect of adsorbing the high temperature of the roof 51 and strengthening the structure of the roof 51, and the plurality of second connecting pipes 75 can disperse the second heat pipe 72 having a high temperature to the adjacent second heat pipe 72. Then, the heat energy is exchanged with the outside air by the plurality of heat dissipation fins 73, so that the working fluid 711 located in the second heat pipe 72 is condensed and then dropped downward, thereby forming an uninterrupted evaporation condensation cycle to reduce The temperature of the roof 51 of the building 5 effectively insulates the heat source of sunlight into the room, avoids the indoor sultry environment, affects the quality and comfort of the living, and has a simple overall structure without additional components, and can effectively reduce construction cost and time. In order to enhance the competitiveness in the market, it is indeed possible to achieve the object of the present invention.

However, the above is only the two preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent change of the patent application scope and the description of the invention is Modifications are still within the scope of the invention.

5‧‧‧Buildings

51‧‧‧ Roof

7‧‧‧Heat unit

71‧‧‧First heat pipe

72‧‧‧second heat pipe

73‧‧‧Heat fins

74‧‧‧First connecting pipe

75‧‧‧Second connection tube

Claims (7)

The utility model relates to a heat siphon type roof heat dissipating device, which is suitable for being installed on a roof of a building and comprises: a plurality of heat dissipating units, each heat dissipating unit comprises a first heat pipe laid on the roof, and an upwardly disposed vertical a second heat pipe on the middle portion of the first heat pipe, a plurality of heat dissipation fins formed on the second heat pipe, and a plurality of first connection pipes connected between the adjacent two first heat pipes and communicating with the first heat pipe, a plurality of first connecting tubes for improving the heat dissipation efficiency of the roof, the first and second heat pipes are connected to each other to form a heat dissipation space, and have a working fluid filled in the heat dissipation space; and an outdoor air conditioner is disposed in the building Outside the object, comprising a cold air heat pipe connected to the first connecting pipe, a valve connected between the cold air heat pipe and the first heat pipe, and a device disposed in the building for controlling the valve connection or not a switch for reducing the temperature at which the outdoor unit of the cold air is operated when the valve is connected; and the first heat pipe laid on the roof when the roof of the building is exposed to sunlight to generate high temperature The thermal energy is transmitted to the second heat pipe by the working fluid therein, and the second heat pipe further exchanges heat energy with the outside air by the plurality of heat dissipation fins, thereby condensing the working fluid located in the second heat pipe It is then dripped down to form an uninterrupted evaporative condensation cycle to reduce the roof temperature of the building. The heat siphon type roof heat sink according to claim 1, wherein each heat dissipating unit further comprises a plurality of second connecting tubes connected between the adjacent two second heat pipes and communicating with the second heat pipe. In order to improve the heat dissipation efficiency of the roof. The thermosyphon type roof heat sink according to claim 2, wherein a cold air outdoor unit is disposed outside the building, and the cold air outdoor unit includes a cold air heat pipe connected to the first heat pipe. The thermosyphon type roof heat sink according to claim 3, wherein the first and second heat pipes and the first and second connecting pipes are substantially flat tubes, and the first two heat pipes are adjacent to each other. It is set in parallel. The thermosyphon roof heat sink according to claim 4, wherein the working fluid is selected from the group consisting of water, methanol, potassium, sodium, indium, cesium, lithium, cesium, mercury, wood alcohol, acetone, and freezing. Agent, liquid nitrogen, liquid oxygen, and combinations of these. The thermosyphon type roof heat sink according to claim 5, wherein the first and second heat pipes and the first and second connecting pipes are made of copper, nickel, stainless steel, tungsten, and the like. The combination. The thermosyphon type roof heat sink according to claim 6, wherein each of the heat dissipation fins is circumferentially disposed on a circumference of the second heat pipe.