JP2603282Y2 - Heat transport device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat transport system utilizing a refrigerant circulation system, and more particularly to a long-distance heat transport device which enables long-distance heat transport.

[0002]

2. Description of the Related Art Conventionally, as a heat transport system using a refrigerant circulation system, a plurality of heat pipes are combined in a bundle and at the same time, adjacent heat pipes are overlapped and arranged in the longitudinal direction. Long-distance heat transport devices having heat pipes are known. This type of heat pipe has a drawback that the heat resistance transmitted from the condensing section of each heat pipe to the evaporating section of another adjacent heat pipe is large, that is, the temperature drop is large.

In order to solve such a drawback, a long-distance transportation device characterized by interposing a heat pump or a refrigerator in the middle of the length of the composite heat pipe has been proposed in Japanese Utility Model 4-1.
No. 0522. However, even if a heat pump or a refrigerator is interposed, the heat is basically replenished only from these, and the amount of loss with respect to the supplied heat is the same, and the heat transfer efficiency is not necessarily improved.

[0004] In order to solve such a disadvantage, Japanese Patent Laid-Open Publication No. Hei.
No. 147290, condenser on top and evaporation on bottom
A device has been proposed in which a heat exchanger is provided, and a refrigerant liquid pipe and a refrigerant gas pipe are respectively connected between the two to perform heat transfer by natural circulation of the refrigerant. However, such a device performs heat transfer by gravity, cannot be used unless there is a difference in elevation, such as a building, and is not suitable for long-distance transportation because of the natural circulation system.

[0005]

SUMMARY OF THE INVENTION In view of the above technical problems, it is an object of the present invention to provide a long-distance heat transport device that enables long-distance heat transport without causing thermal resistance and heat loss. . Another object of the present invention is to provide a long-distance heat transport device in which even if a refrigerant pipe is broken, a refrigerant harmful to the environment such as chlorofluorocarbon or ammonia is not radiated to the outside air.

[0006]

In order to achieve the above technical object, the present invention provides an evaporator, a condenser, a first refrigerant pipe for moving refrigerant gas from the evaporator to the condenser side, In a heat transport device including a second refrigerant pipe for moving a refrigerant liquid from a condenser to an evaporator side, gas transfer of the first refrigerant pipe is performed.
Using a blower provided on the evaporator outlet side , while performing liquid transfer of the second refrigerant pipe using a liquid pump, the first refrigerant pipe around the second refrigerant pipe with both refrigerant pipes We propose a heat transport device characterized by comprising a double tube located.

[0007]

According to the present invention, the movement of the refrigerant is described in JP-A-1-14772.
As shown in No. 90, instead of using gravity, forced circulation is performed by a liquid pump and blower.
Heat can be transported smoothly both horizontally and at long distances. The use of a blower allows a large amount of air to be blown, and the pressure difference (0.2 kgf / c
(approximately ² m2) for pressure-feeding, the pipe diameter can be small. Also, since the temperature can be increased and pressure-fed by the blower, the temperature drop can be reduced accordingly.

In the above apparatus, the first refrigerant pipe for moving the refrigerant gas and the second refrigerant pipe for moving the refrigerant liquid must be provided independently of each other. The second refrigerant pipe to be performed has a certain pressure difference between the outside air and the evaporator due to the pressure feeding of the liquid pump, and may be broken in the middle of the piping route due to the long distance transportation. Yes, if the pipe is broken, a large amount of Freon gas, which is a cause of ozone destruction, will flow out to the outside air, which is extremely problematic for the environment. Therefore, the present invention comprises a double pipe in which the first refrigerant pipe is located around the second refrigerant pipe, that is, the inner pipe is used as a refrigerant liquid, and the outer pipe is used as a refrigerant gas. Since the outer tube has a function to prevent leakage even if the tube is damaged, the safety is higher than piping the refrigerant liquid tube with a single tube. Eliminating the risk of spills to the environment is extremely advantageous for the environment.

Further, since the heat transport is latent heat transport of evaporation and condensation, there is no problem even if the temperature difference between the first refrigerant pipe and the second refrigerant pipe is small. No thermal insulation is required. Therefore, a double pipe in which the first refrigerant pipe and the second refrigerant pipe are integrated can be easily formed. Further, since the transport density by the liquid is considerably higher than the transport density by the gas, the first refrigerant pipe for performing the gas transport is used as an outer pipe to increase the transport amount, and the second refrigerant for performing the liquid transport is used. This is preferable because the transport amount can be balanced with the pipe (inner pipe). That is, in the case of transporting only liquid or only gas, it is not preferable because the forward and return pipes do not have the same cross-sectional diameter, because the transport amount cannot be balanced, and the amount of movement of the fluid corresponding to the heat amount is inevitable. Even if it is composed of double pipes with the same sectional diameter, the diameter is inevitably large, but in the case of the present invention, the latent heat transport is smaller than the sensible heat transport in addition to the pipe diameter, Since there is no problem even if the diameter of the second refrigerant pipe (inner pipe) for transporting the liquid is reduced, even if the pipe is a double pipe, 1.
A pipe diameter of about 1 to 1.2 times is sufficient, and the diameter does not increase.

[0010] It is also a latent heat transport and the first blower.
Since the inside of the refrigerant pipe is maintained under a positive pressure, the pressure difference of the gas becomes small. As a result, the inner pipe of the double pipe can be made of a material having a low pressure resistance. Therefore, not only steel pipe but also plastic pipe can be adopted. In addition, by adopting the double pipe structure, the outer pipe is kept heat from the inner pipe side, and the heat loss is smaller than that of two separate pipes. Further, since the inner tube is also held by the refrigerant gas in the outer tube, heat loss is greatly reduced.

Therefore, according to the present invention, the heat transport piping for district heat supply and the like can be made compact, the cross-sectional area of the heat transport tunnel and the common groove can be reduced, and the construction cost can be greatly reduced.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; However, unless otherwise specified, dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention thereto, but are merely illustrative examples. Not just. FIG.
Is a basic configuration diagram of the present invention, 1 is an evaporator, 2 is a condenser, 3
Is a liquid receiver, 4 is a first refrigerant pipe (hereinafter referred to as a gas outer pipe) for moving refrigerant gas from the evaporator 1 to the condenser 2 side, and 5 is a refrigerant pipe from the condenser 2 to the evaporator 1 side. A second refrigerant pipe (hereinafter, referred to as an in-liquid pipe) that moves, and 7 is an expansion valve. A blower 9 is disposed in the bypass pipe 8 so as to bypass the gas outer pipe 4 on the side of the evaporator 1. On the other hand, a liquid pump 10 is directly connected to an outlet side of the liquid receiver 3 on the condenser 2 side of the inner liquid pipe 5. A double pipe 11 is provided between the gas outer pipe 4 and the liquid inner pipe 5 between the blower 9 outlet side and the liquid pump 10 outlet side. In this case, for example, a vinyl chloride tube is used as the double tube 11.

The cross-sectional diameter of the double pipe 11 is 25
In the case of using an independent pipe with the same calorific value of Cal / h, the transport distance of 2 km, and the same flow rate, and in the case of using a double pipe 11 configuration, the pipes only increase by 100 mm each, and there is almost no change. With just one pipe. Then, in this case, for example, the evaporator 1 has an evaporating temperature of 9 ° C. and makes cold water of 12 ° C.
35 ° C on the side of the condenser 2 at a distance of 2 km for heat transport
, And can be sufficiently cooled. In this case, the refrigerant is pressure-differentiated by a liquid pump from a saturation pressure of 35 ° C. and sent to an evaporator. The refrigerant is compressed by a refrigerator from a saturation pressure of 9 ° C., and the gas passes through a double pipe to a condenser. The blower 9
Is disposed in the bypass pipe 8, the feed pressure thereof can be arbitrarily varied, which is preferable.

Therefore, according to the present invention, it is possible to reduce the size of the regional conduit from the heat source plant for district heat supply to each building. Conversely, when the evaporator 1 side is used as a cold heat source, a temperature load can be obtained from the condenser 2 side, and a heating load can be easily obtained by using, for example, exhaust heat from a garbage depreciation area.

[0015]

As described above, according to the present invention, heat transport over a long distance can be performed without generating heat resistance or heat loss. Further, according to the present invention, it is possible to provide a long-distance heat transport device in which a refrigerant harmful to the environment such as chlorofluorocarbon or ammonia is not diffused to the outside air even if the refrigerant pipe is broken. And so on.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a heat transport device showing a basic configuration of the present invention.

FIG. 2 shows a difference in cross-sectional diameter between both refrigerant pipes when an independent pipe is used at the same flow rate and when a double pipe configuration is used.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 evaporator 2 condenser 3 receiver 4 first refrigerant pipe 5 second refrigerant pipe 7 expansion valve 8 bypass pipe 9 blower 10 liquid pump

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masanori Otake 1-3-1 Uchisaiwai-cho, Chiyoda-ku, Tokyo Within Tokyo Electric Power Company (72) Inventor Kuniaki Kawamura 1-13-1, Mizukino, Moriyacho, Kitasoma-gun, Ibaraki Prefecture No. 8 (72) Inventor Junji Matsuda 2-6-1 Fujisaki, Narashino-shi, Chiba Prefecture (72) Inventor Seiichi Sakuma 2--12-14, Sugaseya, Tama-ku, Kawasaki-shi, Kanagawa Prefecture (72) Gakumi Takeshi Kamimura Kita, Ibaraki Prefecture 3-28-6 Matsumaedai, Moriya-machi, Soma-gun Examiner Tetsuro Senju (56) References JP-A-2-68497 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F28D 15/02 F24F 5/00

Claims (1)

(57) [Scope of request for utility model registration] An evaporator, a condenser, a first refrigerant pipe for moving refrigerant gas from the evaporator to the condenser side, and a second refrigerant for moving refrigerant liquid from the condenser to the evaporator side. In a heat transport device comprising a pipe, a blower provided with gas movement of a first refrigerant pipe on an evaporator outlet side.
It performed using, whereas the liquid movement of the second refrigerant pipe performs by using a liquid pump, the two refrigerant tube is constituted by a double pipe in which the first refrigerant tube located around the second refrigerant pipe Heat transport device characterized by