JPS5852158B2 - heat exchange equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat exchange device equipped with a heat pipe, and particularly to control of heat transport thereof.

A heat exchange device equipped with a heat pipe is used for various purposes, and for convenience, the case where it is applied to an air conditioner will be described below as an example.

2. Description of the Related Art Conventional air conditioners using heat pipes are shown in FIGS. 1 and 2.

In Figs. 1 and 2, 1 is a heat pipe, and this heat pipe consists of a plurality of storage pipes 2 that communicate with each other, and two ladders 3 that connect both ends of these storage pipes to each other. 3a and 3b), a heat medium 4 sealed in a storage tube 2, and a wick (not shown) attached to the inner wall of the storage tube 2 as necessary.

5 is a fin provided at one end of the storage pipe 2; 6 is a wind barrel provided to surround the side of the fin; T is a jacket surrounding the other end of the storage pipe 2; A fluid 8 such as cold water or hot water flows therethrough.

As is clear from the figure, the storage tube 2 is inclined so that the end on the fin side is slightly lower than the end on the jacket side.

Reference numeral 9 denotes a fluid to which heat is exchanged, such as indoor air that requires cooling in the summer.

Ugly In this case fluid 8 is cold water.

The heat of the fluid 9 is taken away by the fluid 8 through the storage pipe 2 when passing between the fins 5, thereby cooling the room.

The heat transport principle of the heat pipe 1 at that time will be explained in the case of cooling operation, for example, according to FIG. 2, which is a cross-sectional view of the device shown in FIG. The liquid of the heat medium 4 sealed inside the navel is collected in the portion of the heat pipe 1 on the side of the fins 5.

Now, when the high temperature fluid 9 flows inside the wind barrel 6, the heat of the fluid 9 heats one end of the storage tube 2 via the fins 5.

Then, the heat medium 4 accumulated there is heated and evaporated, but since the internal pressure at one heated end is higher than the other end, the vapor moves toward the other end.

Since the other end is cooled by the fluid 8 flowing through the jacket 7, the steam that has arrived is condensed and liquefied on the inner surface of the storage tube 1, and the heat carried by the steam is transferred from the storage tube 2 to the fluid 8.

The condensed and liquefied heat medium 4 then flows through the storage tube 2 toward the fins 5, that is, toward the rudder 3a due to the action of gravity.

As the heat medium 4 constantly circulates in the storage tube 2 in this way, the heat of the fluid 9 is continuously transferred from the fin 5 side to the jacket 7 side, making it possible to cool the room.

Since the conventional heat pipe type is configured as described above, the amount of heat transferred by the heat pipe 1 from the fin side to the jacket side and vice versa is equal to the temperature difference between the fluid 9 and the fluid 8. increases or decreases in proportion to

Therefore, if the temperature of either fluid is inappropriate, the temperature of the fluid 8 after heat exchange will be too low or too high, and the indoor air temperature will be kept at an appropriate constant temperature during cooling or heating operation. There was a drawback that it could not be maintained.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and it connects a container storing a heat medium inside to a heat pipe, and separates fluid such as cold water or hot water from the main flow path. The heat medium in the container is cooled or heated by the diverted liquid, and the pressure difference between the heat medium in the container and the heat medium in the heat pipe creates a pressure difference between the heat pipe and the container. An object of the present invention is to provide a heat exchange device that can mutually exchange a heat medium between the two.

An embodiment of the present invention will be described below with reference to FIG.

In Figure 3, the same symbols as in Figures 1 and 2 are the same.
In other words, descriptions of the reference numerals will be omitted as appropriate when corresponding parts are shown.

In FIG. 3, reference numeral 10 is a container that houses a heat medium 4 of the same type as the heat medium 4 of the heat pipe 1 and is airtight from the outside air, and 11 has one end at the bottom of the container 10 and the other end of the heat pipe
This connecting pipe is connected to the first connecting pipe 11a whose other end is connected to the header 3a and the header 3.
b and a second connecting pipe 11b connected to the second connecting pipe 11b.

12 cooperates with the connecting pipe 11 to connect the container 10 and the heat pipe 1.
The switching valve provided on the first connecting pipe 11a is called a first switching valve 12a, and the switching valve provided on the second connecting pipe 11b is called a second switching valve 12b.

13 is a main channel that guides the fluid 8 to the jacket 7; 14 is a branch channel that branches the fluid 8 flowing into the main channel 13 to the container 10 side; It is equipped with

Reference numeral 15 denotes a control valve that is provided in the branch flow path 13 and adjusts the branch flow rate of the fluid 8.

Note that the heat pipe 1 is configured to be able to move up and down in a seesaw manner with respect to the horizontal line H.

In the above configuration, the principle of heat transport by the heat pipe 1 is the same as in the conventional case, but for example, when using the low temperature fluid 8 to cool the room with the heat exchange device of the present invention, it is possible to quickly lower the indoor temperature. In FIG. 3, the heat pipe 1 is tilted at a slight angle θ with respect to the horizontal line H so that the header 3a is at the bottom, and the first switching valve 12a is opened.
The second switching valve 12b and the control valve 15 may be closed.

Since the container 10 is placed indoors, it is at the indoor air temperature, but the storage pipe 2 is kept at a lower temperature than the container 10 because it is exposed to both the fluid 9, which is indoor air, and the low-temperature fluid 8. It will be done.

This means that the pressure of the heat medium inside the storage tube 2 is lower than the pressure of the heat medium 4 inside the container 10, and due to the pressure difference, the 4 heat medium liquids inside the container 10 are transferred to the first switching valve 12a. .

Since it flows into the header 3a through the first connecting pipe 11a and the amount of heat medium 4 can be increased evenly in each storage pipe 2,
According to the heat transport principle described above, heat is actively exchanged between the fluid 9 that requires cooling and the fluid 8 that is a cooling source, making it possible to quickly lower the indoor temperature.

On the other hand, if the indoor air needs to be blown but there is no need for cooling, the first switching valve 12a and control valve 15 may be opened.

At this time, the second switching valve 12b is closed as in the case of cooling.

The container 10 is cooled by the low-temperature fluid 8 flowing into the winding portion 14a of the branch channel 14, but the storage tube 2 is cooled by the fluid 8°9.
Because it is exposed to both, it is kept at a higher temperature than the container 10.

This means that the pressure of the heat medium 4 in the storage tube 2 is higher than the pressure of the heat medium 4 in the container 10, and due to the pressure difference,
The heat medium 4 in the storage pipes 2 flows into the container 10 from the header 3a where the heat medium 4 liquid is stored, through the first connection pipe 11a and the first switching valve 12a, so that the heat is distributed evenly from each storage pipe 2. The amount of media can be reduced.

Furthermore, inside the storage tube 2 where the amount of heat medium 4 has decreased, the heat transfer surface is
Since the heat medium 4 is used up and a so-called dryout phenomenon occurs in which no heat exchange occurs at all, it becomes possible to only blow air without exchanging heat between the fluids 8 and 9.

Similarly, when the fluid 8 is heated with hot water (strained) and used for indoor heating operation in winter, the heat exchanger is tilted so that the rudder 3b is slightly downward (θ1 in the figure) and the first switching valve 12
a is closed, the second switching valve 12"b is opened, and if heating is required, the control valve 15 may be opened, and if only ventilation is required, the control valve 15 is closed. By operating in this way, it is possible to control heat transport, that is, heat exchange, in the same way as in the case of air conditioning described above.

In this way, by utilizing the phase change of the heat medium 4, the heat medium 4 can be exchanged between the container 10 and the heat pipe 1.

By the way, regarding the adjustment of the control valve 15, for example, the indoor air temperature may be detected, the opening degree of the control valve 15 may be adjusted according to the detected temperature, and the divided flow rate of the fluid 8 may be automatically controlled. For example, automatic regulation of indoor temperature can be achieved.

In the above embodiment, indoor air-conditioning operation using cold and hot water was explained, but it is not limited to indoor air-conditioning operation. Even when used, the same effects as in the above embodiment can be obtained.

In the embodiment, an example was shown in which the liquid heat medium 4 is exchanged between the heat pipe 1 and the container 10, but for example, it is possible to connect the connecting pipe 11 to the header 3 in which the liquid heat medium 4 is not stored. Even if the heat pipe 1 and the container 10 are connected to each other so that the gaseous heat medium 4 is transferred between the heat pipe 1 and the container 10, a corresponding effect can be obtained.

As described above, according to the present invention, a fluid such as cold or hot water is transferred to a heat medium in a container that is communicated via a connecting pipe to a heat pipe that transfers heat by utilizing boiling and condensation of the heat medium. Cooling or heating by dividing the flow from the main flow path, and the divided flow! Since the control valve is provided, the heat medium can be mutually transported between the heat pipe and the container, and the amount of circulation of the heat medium within the heat pipe can be controlled, that is, the amount of heat exchange can be controlled. A heat pipe type heat exchange device that can be used can be obtained.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a conventional device, FIG. 2 is a partial sectional view of a main part showing the internal structure of the device shown in FIG. 1, and FIG. 3 is a partial sectional view of a main part showing an embodiment of the present invention. be. In the figure, 1 is a heat pipe, 2 is a storage pipe, 3 is a header, 5 is a fin, 7 is a jacket, 10 is a container, 11 is a connecting pipe, 12 is a switching valve, 13 is a main flow path, and 14 is a branch flow path. . Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] 1. A heat pipe constituted by a storage pipe for storing a heat medium, a container placed in communication with the heat pipe, and a fluid such as cold water or hot water exchanged by the heat pipe that is diverted from the main flow path. A branch passage for cooling or heating the heat medium in the container by winding a pipe line around the outer periphery of the container, and a control valve for controlling the divided flow rate of the fluid. The heating medium is exchanged between the heat pipe and the container by a pressure difference based on the temperature with the heating medium, and the amount of the heating medium in the heat pipe is controlled. heat exchange equipment. 2. The heat exchange device according to claim 1, wherein the heat pipe is constituted by a plurality of storage tubes that communicate with each other at both ends. 3. The connecting tubes include a first connecting tube whose one end is connected to one end of the heat pipe and the other end to the container, and a first connecting tube whose one end is connected to the other end of the heat pipe and the other end to the container. 2 connecting pipes, and the heat pipe and the container are selectively communicated through only one of these connecting pipes. The heat exchange device described. 4. Claims 1 to 3, characterized in that the heat pipe moves up and down in a seesaw manner with respect to the horizontal line.
The heat exchange device according to any of paragraphs.