JPH10274487A - Heat pipe type cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a heat pipe type cooler in which a normal operating condition can be reset from a frozen refrigerant condition in a short time. SOLUTION: Seven rows of horizontal groove are made in the right side face of a cooling block 2A having left side face to be fixed with a semiconductor element 5. Bottom part of L-shaped heat pipes are then inserted sequentially from the underside in the order of 1B, 1A, 1B, 1A, 1B, 1A, 1B and brazed. The bottom part of the heat pipe 1A is injected with pure water by a conventional quantity and the bottom part of the heat pipe 1B is injected with pure water by 35-65% of the quantity of refrigerant of the heat pipe 1A. When the pure water is frozen at the time of starting in the early morning of winter season, the pure water in the heat pipe 1B having smaller quantity and thermal capacity is melted at first and then the pure water in the heat pipe 1A is melted thus shortening the rising time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention particularly relates to a heat pipe type cooler used in an environment where a refrigerant freezes.

[0002]

2. Description of the Related Art FIG. 11 is a longitudinal sectional view showing a state in which a conventional heat pipe type cooler is housed in a box under the floor of a railway vehicle, as viewed from the running direction of the vehicle. In FIG.
A box 9 is suspended under the floor of a vehicle (not shown), and a partition 9a for partitioning the box air-tightly from side to side is vertically installed with its upper part inclined leftward by about 10 °.

An opening 9b is formed on the outer periphery of an open chamber 11 formed on the right side by the partition 9, and a punched iron plate (not shown) is additionally provided in this opening. A snubber unit and a gate drive unit (not shown) are housed in a sealed chamber 10 formed on the left side of the partition 9a.

A heat pipe 1L as a heat transport pipe extends through an intermediate portion of the partition 9a.
In the open chamber 11 side, a plurality of heat radiation fins 3Q made of aluminum plate are inserted at equal intervals and brazed to the heat pipe 1L.

[0005] The heat pipe 1L has the sealing chamber 10 side inserted into a cooling block 2D made of copper material and brazed. Pure water 4 as a refrigerant is injected into the heat pipe 1L in advance, and the upper and lower surfaces of the cooling block 2D are
A plurality of semiconductor elements 5 such as GTO are fixed.

In the heat pipe type cooler thus configured, the heat generated in the semiconductor element 5 that is energized to obtain a power supply with a variable voltage and a variable frequency passes through the cooling block 2D to the pure water in the heat pipe 1L. 4 is transmitted.

[0007] The steam which the pure water 4 boiled and vaporized by this heat is
The inside of the heat pipe 1L moves to the upper right, and the moved fins heat the cooling fins 3Q. Then, the cooling fins 3Q flow through the opening 9b of the open chamber 11 as the vehicle travels, and are cooled by the outside air flowing out of the opening.

As a result, the steam flowing into the open chamber 11 side of the heat pipe 1L is cooled, condensed and formed as water droplets, flows down the bottom of the heat pipe 1L to the left, and returns to the cooling block 2L.
Heated by the heat transmitted from D, the above-described phase change of vaporization and condensation is repeated.

Here, the reason why pure water 4 is employed as the heat transfer medium injected into the heat pipe 1L is that heat transfer characteristics such as vaporization temperature and heat capacity are suitable as cooling conditions for the semiconductor element 5, This is because not only is it excellent in reducing the size of the cooler, but there is no problem such as environmental pollution.

On the other hand, it is important that a predetermined liquid pure water 4 remains at the bottom of the heat pipe 1L even when the current flowing through the semiconductor element 5 is maximum and the heat generation is maximum. The amount is determined by the inner diameter, length, and total volume of the heat pipe 1L, cooling conditions by the cooling fins 3Q, and the like.

FIG. 12 is a perspective view showing an example of a conventional heat pipe cooler different from FIG. 11, and FIG. 13 is a longitudinal sectional view of FIG. 12 and 13 differ from the heat pipe cooler shown in FIG. 11 in the direction of the cooling block and the number and shape of the heat pipes.

That is, the cooling block 2E shown in FIGS. 12 and 13 is housed vertically inside the box 9 shown in FIG. 11, and the semiconductor element 5 is mounted only on the left side.

The heat pipe 1A is formed in a U-shape,
The left end serving as the U-shaped bottom is inserted into a U-shaped groove formed in the cooling block 2E, and then joined by brazing.

In the heat pipe cooler thus configured, a partition 9a for vertically dividing the box 9 shown in FIG. 11 is formed, and the right side of the cooling block 2E is formed with respect to the partition 9a. By fixing, the space between the cooling block 2 </ b> E and the semiconductor element 5 occupying the inside of the sealed chamber 10 and other devices can be efficiently arranged, and the box 9 can be downsized. 9 differs from the heat pipe shown in FIG.

Further, by fixing the semiconductor element 5 to the opposing portion on the left side of the cooling block 2E in which the bottoms of the three heat pipes 1A are buried, the cooling conditions due to the difference in the position of the upper and lower semiconductor elements 5 are determined. Uniformity can also be achieved.

[0016]

However, in the heat pipe type cooler constructed as described above, when the vehicle is started from the garage in the early morning of a cold region, pure water injected into the bottom of the heat pipe is required. Is frozen, especially in the figure
In the heat pipe 1A shown at 12, since the right end of the pure water reservoir extends to the open chamber side on the right side of the partition 9a,
It takes time to start running.

For this reason, a method has been adopted in which a heater is installed inside the box 9 to melt the pure water that has been frozen and then travels. However, this heater is then placed inside the sealed portion 10 of the box. The occupied space hinders the downsizing and weight reduction of the box 9.

Further, even if the operation is performed after the pure water 4 is liquefied,
The vaporized water moves to the heat radiating section of the heat pipe, and the condensed pure water freezes. As a result of the vaporization, condensation, and freezing, the pure water at the bottom of the heat pipe decreases. May disappear.

Then, the bottom of the heat pipe may be in a so-called empty state due to the heat transmitted from the semiconductor element 5, and the semiconductor element 5 may be heated. Then, an object of the present invention is to obtain a heat pipe type cooler which can return from a frozen state of a refrigerant to a normal operation state in a short time.

[0020]

According to a first aspect of the present invention, there is provided a heat dissipating side of a plurality of heat transport pipes having a heating element attached to one side of a cooling block and a base end embedded on the other side of the cooling block. In a heat pipe type cooler in which a cooling fin is provided at a base end of a heat transport pipe, at least one of the heat transport pipes is cooled by the amount of the refrigerant of another heat transport pipe. It is characterized by being 35 to 65%.

According to a second aspect of the present invention, there is provided a heat pipe type cooler wherein a bent portion formed by bending a base end of a heat transport pipe having a small amount of refrigerant is formed laterally on the other side of the cooling block. It is characterized by. A heat pipe type cooler according to a third aspect of the present invention is characterized in that the groove in which the bent portion is embedded is inclined with the front end side of the bent portion downward.

Further, in the heat pipe type cooler according to the present invention, the protruding length of the heat transport tube having the bent portion from the cooling block is set to 5/5 of the length of the other heat transport tubes. 1
４4/5. Claim 5
The heat pipe type cooler according to the present invention is characterized in that a plurality of grooves are formed on the inner periphery of the bent portion into which the refrigerant of 35 to 65% is injected.

According to a sixth aspect of the present invention, a heat radiating fin is provided on one side of a cooling block, and a heat radiating fin is provided on a heat radiating side of a plurality of heat transport pipes whose base ends are buried on the other side of the cooling block. In a heat pipe type cooler provided with a refrigerant injected into a base end of a heat transport pipe, a base end of a radiating rod penetrating through a cooling fin is inserted into the other side of the cooling block. Further, a heat pipe type cooler according to the invention according to claim 7 is characterized in that the heating element is a semiconductor element mounted on a vehicle.

According to the invention corresponding to the first to fifth aspects, the refrigerant in the heat transport pipe having a small injection amount of the refrigerant and a small heat capacity is first vaporized in a short time, and then the heat transport is performed. The refrigerant in the other heat transport tube having a large heat capacity, which is gradually heated by the heat of the tube and the heating element, is vaporized.

Similarly, in the invention corresponding to claim 6, first, the heat radiating rod is heated, and then the refrigerant of the other heat transport pipe having a large heat capacity which is gradually overheated by the heat of the heat radiating rod and the heat generating element. Vaporize.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the heat pipe type cooler of the present invention will be described below with reference to the drawings. FIG.
FIG. 2A is a perspective view showing a first embodiment of a heat pipe type cooler of the present invention, and FIG. 2A is a longitudinal sectional view of FIG. 1 and particularly corresponds to FIG. 12 and FIG. It is a figure corresponding to Claim 1, Claim 2, and Claim 7. FIG. 2 (b)
FIG. 2 is an enlarged view of a portion A in FIG.

FIGS. 1 and 2 differ from FIGS. 12 and 13 shown in the prior art in the number of heat pipes and the amount of pure water injected. That is, the cooling block 2A
A right side surface of the heat pipe 1A is formed in the same shape as the heat pipe 1A shown in FIGS. 12 and 13 with respect to a position facing the center of the semiconductor element 5 mounted on the left side surface. The bottom of 1A is buried by brazing.

At the bottom of these heat pipes 1A,
Pure water 4 of the same amount as the pure water 4 injected into the heat pipe 1A shown in FIGS. 12 and 13 is injected. Between these heat pipes 1A, the bottom of the heat pipe 1B into which the amount of the pure water 4 injected is about one half, is similarly inserted into a groove formed in the cooling block 2A and brazed. As a result, most of the heat pipe 1B is injected into the U-shaped bottom.

In the heat pipe type cooler configured as described above, in the early morning of winter, from the semiconductor element 5 attached to the cooling block 2A, through the cooling block 2A, to the pure water frozen at the bottom of the heat pipe 2B. The transferred heat can thaw frozen pure water having a small volume in a short time.

Therefore, the heat pipe 1B, which has become high temperature as a result, and the cooling fin 3A,
Since A is heated and the pure water at the bottom of the heat pipe 1A can be melted, the train in the garage can be pulled out to the traveling track with a short rise time, and the operation can be shifted to a predetermined operation.

FIG. 3 is a perspective view showing a heat pipe type cooler according to a second embodiment of the present invention, which corresponds to FIG. 1 shown in the first embodiment, and particularly corresponds to claim 3. FIG.
FIG. 4 shows a vertical cross section of the cooling block of the heat pipe type cooler shown in FIG.

FIGS. 3 and 4 differ from FIGS. 1 and 2 shown in the first embodiment in that a base end is formed in an L-shape instead of the heat pipe 1B shown in FIGS. The groove of the cooling block in which the base end of the heat pipe is buried is inclined as shown in the side view of FIG.

That is, a groove formed on the right side of the cooling block 2A shown in FIGS. 1 and 2 is formed on the right side of the cooling block 2B with respect to a position opposed to the center of the back surface of the semiconductor element 5. As shown in FIG. 4, a total of three similar grooves 2a are formed horizontally at the center, upper part, and lower part.

In the upper part of the cooling block 2B, there is formed a groove 2b whose right side in FIG. 4 is inclined downward by about 10 °, and further below the lower horizontal groove 2a, an upper right groove is formed. 2c is formed. Similarly, the lower horizontal groove 2a
A groove 2b descending to the right is also formed on the upper side, and a groove 2c descending to the left is also formed on the lower end.

Of these, three horizontal grooves 2a are provided in FIG.
The bottom of the heat pipe 1A, which is the same as the U-shaped heat pipe shown in the above, is brazed and has four inclined grooves 2b, 2c.
Is brazed to the bottom of a heat pipe 1C having an L-shaped lower end.

The heat pipe 1C inserted into the groove 2b is brazed with the bottom end on the right side, and the heat pipe 1C is inserted into the groove 2c.
The heat pipe 1C is inserted with the bottom end left.

The pure water 4 injected into the heat pipe 1A is
As in FIGS. 1 and 2, the heat pipe 1C is injected into the heat pipe 1C until the upper end of the bottom becomes a liquid level until the upper end of the bottom becomes a liquid level.

As described above, the heat pipe is connected to the cooling block 2.
Also in the heat pipe cooler buried in B, the amount of pure water injected into the heat pipe 1c is small, and the portion where the pure water is stored is inside the cooling block 2B. The temperature rapidly rises due to heat transmitted from the cooling block 2B through the cooling block 2B. Even if the temperature is frozen, the temperature can be thawed in a short time, so that the start-up time until the operation of the vehicle can be shortened.

FIG. 5 is a longitudinal sectional view showing a third embodiment of the heat pipe cooler according to the present invention, and corresponds to FIG. 2 shown in the first embodiment and FIG. 3 shown in the second embodiment. FIG. 6 is a diagram particularly corresponding to claim 4.

FIG. 5 differs from FIGS. 2 and 5 in that a U-shaped heat pipe having a small height is used instead of the L-shaped heat pipe 1C shown in FIG. The cooling block is the same as the cooling block 2A shown in FIG.

Therefore, the two left cooling fins 3G
, A total of seven heat pipes are penetrated, but the lower heat pipe 1D does not penetrate the right cooling fin 3F, and the lower cooling fin 3E is connected to the lower two heat pipes. The pipe 1D does not penetrate and the cooling fin 3D on the right
, Only three heat pipes 1A and a short upper end heat pipe 1D penetrate.

Even in the heat pipe cooler thus configured, the amount of pure water injected into the short heat pipe 1D is reduced to approximately one half of the amount injected into the long heat pipe 1A, so that the short heat pipe The melting time of the pure water frozen inside the 1D is combined with the decrease in the amount of heat radiation due to the decrease in the number of cooling fins inserted into these heat pipes 1D.
It is possible to shorten the start-up time until the operation of the vehicle.

FIG. 6 is a longitudinal sectional view showing a heat pipe type cooler according to a fourth embodiment of the present invention, and corresponds to FIGS. 2, 3 and 5 shown in the above-described embodiment, and FIG. It is a figure corresponding to Claim 4 similarly.

FIG. 6 is different from FIG. 5 shown in the third embodiment in that the short heat pipe 1 shown in FIG.
Instead of D, heat pipes having different lengths were used, and the shortest heat pipe 1H was inserted at the top. That is, the heat pipes 1H, 1G, 1F, and 1E are respectively 1/5, 1/5, 2/5, and 3/5 of the length of the heat pipe 1A.

In the heat pipe cooler thus configured, the frozen pure water of the shortest heat pipe 1H is thawed, and then the heat of the heat pipe 1H is transferred to the radiation fins 3H.
The pure water of the heat pipe 1G transmitted through the M is melted, and then melts in the order of the heat pipes 1F and 1E, and finally the frozen pure water of the heat pipe 1A is melted by the heat.

Therefore, even in the heat pipe cooler thus configured, the rise time from the frozen state of the refrigerant to the operation of the vehicle can be shortened. next,
FIG. 7 is a longitudinal sectional view showing a fifth embodiment of the heat pipe cooler of the present invention, and corresponds to FIGS. 2, 3, 5 and 6 of the above-described embodiment.

FIG. 7 differs from the above-described embodiment in the connection between the cooling fins and the heat pipe.
The arrangement of the heat pipe is the same as that of the heat pipe cooler shown in FIG.

That is, the three heat pipes 1A have:
Although all the cooling fins are brazed, only two cooling fins 3N at the right end are brazed to the heat pipe 1B adjacent to the heat pipe 1A, and a total of 11 cooling fins 3N arranged on the left side are provided. The cooling fins 3P are heat pipes 1
It is brazed only to A.

In the heat pipe cooler thus configured, the freezing of pure water in the heat pipe 1B, in which the amount of pure water injected is small and the number of brazed cooling fins is small, is thawed, Next, the pure water of the heat pipe 1A heated by the heat pipes 1B via the cooling fins 3N is melted. Therefore, even in the heat pipe type cooler thus configured, the rise time from the frozen state of pure water to the operation of the vehicle can be shortened.

Next, FIG. 8 is a longitudinal sectional view showing a sixth embodiment of the heat pipe type cooler of the present invention, which is similar to FIGS. 2, 3, 5 and 6 shown in the above embodiment. FIG. 8 corresponds to FIG. 7 and corresponds to claim 6.

FIG. 8 differs from FIG. 7 shown in the fifth embodiment in that the heat pipe 1 shown in FIG.
Instead of B, a solid copper bar 6 is adopted, and the cooling fins 3N are removed as in FIG.
The left cooling fin 3P is not brazed but is loosely fitted.

Also in the heat pipe type cooler thus configured, the copper rod 6, the lower end of which is heated by the heat transmitted from the cooling block 2C, can easily transfer heat to the tip as compared with the heat pipe 1A. Since the thermal gradient can be reduced, first, the cooling block 2C is cooled by the copper rod 6, and the pure water of the heat pipe 1A heated by the heat transmitted from the tip of the copper rod 6 through the cooling fins 3N. Freezing then thaws. Therefore, even in the heat pipe type cooler configured as described above, the rise time from the frozen state of the refrigerant to the operation of the vehicle can be reduced.

Next, FIG. 9 is a partially cutaway sectional view showing a heat pipe type cooler according to a seventh embodiment of the present invention. A spiral groove 7 (hereinafter referred to as a groove) is formed on the inner surface of 1J except for both ends.

In the heat pipe in which the groove is formed as described above, the pure water distributed at the bottom of the groove is heated with a small amount of heat to increase the heat transfer area from the cooling block, and the pure water distributed from the frozen state for a short time. Can be melted.

Therefore, for example, the cooling block 2A of the heat pipe 1B shown in FIGS.
By applying to the bottom buried in the vehicle, the rise time from the frozen state to the operation of the vehicle can be shortened.

Therefore, FIGS. 2 and 3 of the second embodiment.
The heat pipe 1C shown in FIG. 5, the heat pipe 1D shown in FIG. 5 of the third embodiment, the heat pipes 1E, 1F, 1G, 1H shown in FIG. 6 of the fourth embodiment, and the heat pipe 1C shown in FIG. By forming the groove 7 in the same manner with respect to the heat pipe 1B shown in FIG. 7, the frozen pure water inside the groove 7 is thawed in a short time, the temperature of these heat pipes is increased quickly, and It is possible to shorten a rise time required to reach a normal operation state.

Next, FIG. 10A is a view showing an eighth embodiment of the heat pipe type cooler of the present invention, and FIG.
FIG. 10B is an enlarged cross-sectional view taken along the line BB of FIG. 10A, corresponding to FIG. 9 and corresponding to claim 7 in the same manner as FIG.

FIG. 10 differs from FIG. 9 in that a plurality of grooves 8 (hereinafter referred to as grooves) are formed continuously in the longitudinal direction with respect to the inner periphery of the heat pipe.
In the heat pipe configured as described above, similarly to the heat pipe 1J shown in FIG. 9 of the seventh embodiment, the groove 8 is formed in the portion buried in the cooling block. Pure water frozen at the bottom,
As the heat pipe 1K is melted and the adjacent heat pipe is heated via the cooling fins in accordance with the temperature rise of the heat pipe 1K, the vehicle can be changed from the frozen state to the normal operation of the vehicle similarly to the heat pipe 1J shown in FIG. It is possible to shorten the rise time until the end.

In the embodiment shown in FIGS. 1 to 10, the pure water injected into the bottom of the heat pipes 1B and 1C is the pure water injected into the heat pipe 1A adjacent to the heat pipes 1B and 1C. 50% of the amount of
It may vary from% to a maximum of 65%.

[0060]

As described above, according to the first aspect of the present invention, a heat generating body is provided on one side of the cooling block, and the heat radiating side of the plurality of heat transport pipes whose base ends are buried on the other side of the cooling block. In a heat pipe type cooler in which a cooling fin is provided at a base end of a heat transport pipe, at least one of the heat transport pipes is cooled by the amount of the refrigerant of another heat transport pipe. By setting it to 35 to 65%, the refrigerant in the heat transport pipe with a small amount of refrigerant injected and a small heat capacity is first vaporized in a short time, and then another heat transport with a large heat capacity is gradually heated by the heat of the heating element. Since the refrigerant in the pipe is vaporized, it is possible to obtain a heat pipe type cooler capable of returning to a normal operation state from a frozen state of the refrigerant in a short time.

According to the second aspect of the present invention,
By forming a bent portion at the base end of the heat transport pipe with a small amount of refrigerant laterally on the other side of the cooling block, according to the invention corresponding to claim 3, a groove in which the bent portion is buried is formed. Since the tip side of the bent portion is inclined downward, the refrigerant in the heat transport pipe with a small amount of injected refrigerant and a small heat capacity is first vaporized in a short time, and then gradually heated by the heat of the heating element. Since the refrigerant in the other heat transport pipe having a large heat capacity is vaporized, it is possible to obtain a heat pipe type cooler capable of returning from a frozen state of the refrigerant to a normal operation state in a short time.

According to a fourth aspect of the present invention,
The invention according to claim 5, wherein the projecting length of the bent heat-transfer pipe from the cooling block is set to 1/5 to 4/5 of the length of the other heat-transport pipes. According to 35
By forming a plurality of grooves in the inner periphery of the bent portion into which the refrigerant of up to 65% is injected, the refrigerant in the heat transport pipe having a small amount of the injected refrigerant and a small heat capacity is first vaporized in a short time, Then
Since the refrigerant in the other heat transport pipe having a large heat capacity gradually heated by the heat of the heating element is vaporized, a heat pipe type cooler capable of returning from a frozen state of the refrigerant to a normal operation state in a short time is obtained. be able to.

According to a sixth aspect of the present invention,
A heating element is attached to one side of the cooling block, and radiation fins are provided on the radiation side of a plurality of heat transport pipes whose base ends are buried on the other side of the cooling block, and a refrigerant is injected into the proximal end of the heat transport pipe. In the heat pipe cooler, the heat sink is first heated by inserting the base end of the heat sink penetrating the cooling fin on the other side of the cooling block, and then gradually heated by the heat of the heating element. Since the refrigerant in the other heat transport pipe having a large heat capacity is vaporized, it is possible to obtain a heat pipe type cooler capable of returning from a frozen state of the refrigerant to a normal operation state in a short time.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a heat pipe type cooler of the present invention.

2A is a longitudinal sectional view of FIG. 1, and FIG. 2B is an enlarged detailed view of a portion A of FIG.

FIG. 3 is a perspective view showing a heat pipe type cooler according to a second embodiment of the present invention.

FIG. 4 is a longitudinal sectional view of FIG. 3;

FIG. 5 is a longitudinal sectional view showing a third embodiment of the heat pipe type cooler of the present invention.

FIG. 6 is a longitudinal sectional view showing a fourth embodiment of the heat pipe type cooler of the present invention.

FIG. 7 is a longitudinal sectional view showing a fifth embodiment of the heat pipe type cooler of the present invention.

FIG. 8 is a longitudinal sectional view showing a heat pipe type cooler according to a sixth embodiment of the present invention.

FIG. 9 is a cutaway sectional view showing a heat pipe type cooler according to a seventh embodiment of the present invention.

FIG. 10A is a partial side view showing an eighth embodiment of the heat pipe type cooler of the present invention, and FIG. 10B is an enlarged detailed view of BB of FIG.

FIG. 11 is a longitudinal sectional view showing an example of a conventional heat pipe type cooler and a box housing the heat pipe type cooler.

FIG. 12 is a perspective view showing an example different from FIG. 11 of the conventional heat pipe type cooler.

FIG. 13 is a longitudinal sectional view of FIG.

[Explanation of symbols]

1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H: heat pipe, 2A, 2B, 2C, 2D, 2E: cooling block, 3A, 3B, 3C, 3D, 3E, 3F, 3G, 3
H, 3J, 3K, 3L, 3M, 3N, 3P ... cooling fins, 4 ... pure water, 5 ... semiconductor elements, 6 ... copper rods, 7, 8 ...
groove.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takashi Hashimoto 1 Toshiba-cho, Fuchu-shi, Tokyo Inside the Fuchu factory, Toshiba Corporation

Claims (7)

[Claims] A cooling element is provided on one side of a cooling block, and a radiating fin is provided on a radiating side of a plurality of heat transporting tubes having a base end embedded on the other side of the cooling block. In the heat pipe type cooler in which the refrigerant is injected into the base end, the amount of the refrigerant in at least one of the heat transport tubes is 35 to 65% of the amount of the refrigerant in the other heat transport tubes. Heat pipe type cooler. 2. The heat pipe according to claim 1, wherein a bent portion formed by bending a base end of the heat transport pipe having a small amount of the refrigerant is buried laterally on the other side of the cooling block. Type cooler. 3. The heat pipe-type cooler according to claim 2, wherein the bent portion is buried with the front end side of the bent portion facing downward, and the bent portion is inclined to the other side of the cooling block. 4. The protruding length of the heat transport tube having the bent portion formed from the cooling block is set to be one fifth to four fifths of the length of another heat transport tube. The heat pipe type cooler according to claim 2 or 3, wherein 5. The heat pipe according to claim 2, wherein a plurality of grooves are formed on an inner periphery of the bent portion into which the refrigerant of 35 to 65% is injected. Type cooler. 6. A heat radiating fin is provided on one side of the cooling block, and a heat radiating fin is provided on a heat radiating side of a plurality of heat transporting tubes whose base ends are buried on the other side of the cooling block. In a heat pipe type cooler having a refrigerant injected into its base end, a heat pipe type cooler characterized in that a base end of a radiating rod penetrating through said cooling fin is inserted into the other side of said cooling block. 7. The heat pipe type cooler according to claim 1, wherein said heat generating element is a semiconductor element mounted on a vehicle.