JPS60226666A - Dehumidifying device of heat transfer pipe imbedded in earth - Google Patents

Abstract

PURPOSE:To effectively perform the dehumidification of a heat transfer pipe for heat exchanging by a structure wherein an electric heater is provided on the inner surface of the heat transfer pipe. CONSTITUTION:A sheet-shaped electric heater 3 is installed on the inner surface of a heat transfer pipe 1 imbedded in the earth. An air hole 6 provided on the floor of a building 5 is connected with an outdoor air suction hole 7 by means of the heat transfer pipe 1. An air exit hole 9, which is open outdoors, is provided just below the air hole 6 by branching off the heat exchange pipe 1. A damper 10 to selectively shut-off the draft to the air hole 6 and to the air exit hole 9 is provided at the branched-off part. When the use of the titled device is intended, at first, the electric heater 3 and a fan 11 are energized under the state that the damper 10 is set in the direction so as to open the air exit hole 9 and to close the air hole 6. Thus, water droplets adhered onto the pipe wall are evaporated and discharged from the air exit hole 9 by means of the fan 11. After the water content in the pipe is removed, the electric heater 3 is stopped in its power supply and the damper 10 is changed-over in the direction so as to open the air hole 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a dehumidifying device for heat exchanger tubes buried underground to utilize soil heat.

[Background technology]

As shown in Figure 1, there is a known soil heat utilization device that effectively utilizes soil heat by using a blower to conduct airflow through heat transfer tubes (called cool tubes) buried underground. When using the device for cooling in the summer,
Due to the inflow of humid air into the heat exchanger tubes, dew often formed on the tube walls as shown in FIG. In the figure, 1 is a heat exchanger tube,
2 rains water drops. Particularly when the blower was turned off, dew condensation was likely to occur. This condensed water evaporates and mixes with the cold air when the next operation starts, leading to humid air being drawn into the room, which impairs comfort.

In order to prevent this, for example,
As described in the publication, there is a device that is equipped with a drain section to collect the condensed water of the heat transfer tube, and the water collected here is removed by a drainage pump, but due to the material and surface roughness of the tube wall. It depends, but in general, condensed water forms a film that adheres to the pipe wall, making it difficult for it to flow.

It has been difficult to perform effective dehumidification with the above-mentioned drainage device.

[Purpose of the invention]

This invention was made in view of the above-mentioned circumstances, and since it effectively dehumidifies underground heat exchanger tubes, the dehumidifier has the following features:
It is characterized by an electric heater installed on the inner surface of the heat exchanger tube.

This will be explained below based on the embodiment shown in the drawings. Figs. 3 and 4 show an example of a dehumidifying device according to the present invention.
A sheet-like electric heater 3 is installed inside the inner surface. The electric heater 3 is designed to be able to evaporate water droplets adhering to the inside of the tube in a short period of time, and not to significantly impede heat exchange performance between the tube wall and the circulating air. FIG. 5 shows an example in which this heater-equipped heat exchanger tube 1 is installed, and a vent 6 provided on the floor of a building 50 is connected to an outdoor air intake lower through this heat exchanger tube 1 buried underground. Directly below the ventilation port 6, an exhaust port 9 is provided which branches from the heat transfer tube l and opens to the outdoors, and this branching portion selectively blocks ventilation to the ventilation port 6 and the exhaust port 9. A damper (partition plate) 10 is provided.

Furthermore, a fan 11 is provided below the damper 10 to send air into the room through the entire heat exchanger tube 1.

When using this soil heat utilization device, first the damper 1
0 so that the exhaust port 9 opens and the ventilation port 6 closes, and the electric heater 3 and fan 11 are energized. Due to this energization, water droplets adhering to the tube wall are evaporated and discharged from the exhaust port 9 by the fan 11. When this state is maintained for a certain period of time and the moisture inside the pipe is sufficiently removed, the power to the electric heater 3 is stopped, and the damper 10 is moved in the direction in which the vent 6 opens (the exhaust port 9
(in the direction in which it closes) and then operate.

As a result, the air taken into the heat exchanger tube 1 from the intake lower is cooled (warmed in winter) while passing through the heat exchanger tube 1 buried underground, and then supplied into the room.

The book shown in Fig. 6 is an example in which the damper 10 is installed in a reversible manner, and the fan 11 is reversible.
If the temperature is high in the attic or the attic, the condensed water in the heat transfer tubes 1 is discharged outdoors by rotating the fan 11 in the opposite direction at the start of operation. In this case, if the indoor air is sufficiently hot, the electric heater 3 can be omitted. [Effects of the Invention] If the dehumidifier according to the present invention is installed, (3) dew condensation inside the heat pipes will be reduced. Even in such cases, the moisture is removed to the outside at the start of operation, and only air with low moisture is supplied indoors, so a comfortable ventilation condition can be achieved. Furthermore, if humid air is directly taken in, bacteria and the like are also often taken in at the same time, which poses a sanitary problem, but if this dehumidifier is provided, such problems will not occur.

[Reference]

Ventilation fan 11 in such a soil heat utilization device
As a power source, as shown in FIG. 7, a solar cell 20 installed on the roof on the south side and a storage battery 22 installed on the ground 21 outdoors are often used. During the day, the fan 11 is powered by the power from the solar battery 20, and the surplus power is used by the storage battery 22.
to charge. At night, the fan 11 is operated only by the storage battery 22.

However, storage batteries generally have temperature characteristics, such as high temperatures and
Since it is sensitive to low temperatures, maintenance is required depending on the temperature. In order to improve this problem, it is preferable to install a storage battery 22 inside the heat exchanger tube 1 as shown in FIG. (4) The temperature underground is constant at 15 to 20 degrees Celsius all year round, so storage batteries 22
By installing the device underground, there is no need for special maintenance to deal with temperature changes, and the product's lifespan is extended because it is always used at the appropriate temperature. Also,
Since the wiring is also protected by the heat exchanger tube 1, it has a long life.

Fig. 89 and Fig. 10 are books illustrating a method for physically removing condensed water adhering to the inner surface of the heat transfer tube 1 buried underground, so the horizontal tube section 1a buried horizontally in the ground is shown. A guide rod 25 is provided in the axial direction, and a pad 26 whose outer peripheral portion contacts the inner surface of the heat exchanger tube 1 is slidably fitted into the guide rod 25. this bad 26
is guided by guide rollers 27 on both the front and rear sides of the
Connected are wires 30 and 30' which are wound and driven back and forth by external motors 29 and 29'. The lower ends of the hard tube portions 1 b and lb' of the heat exchanger tube 1 are dug down below the level of the horizontal tube portion 1 a, and drain reservoirs 31 and 31' are provided there. The drain reservoirs 31 and 31' are equipped with pumps 33 and 33 installed on the ground.
The lower end portions of the water suction pipes 34 and 34' are inserted so that the condensed water accumulated in the drain reservoir can be drained by the pumps 33 and 33'. When the fan (not shown) is stopped, water droplets (condensation water) adhering to the inner surface of the heat transfer tube are removed by driving the motor 29 (or 29') and removing the water from the pad 2.
By moving pad 6, pad 2 is moved as shown in FIG.
6 and drop it into the drain reservoir 31 (or 31'). The water droplets 2 that have fallen into the drain reservoir 31 (31') may be pumped to the ground by operating the pump 33 (33') and drained. Note that during ventilation, the pad 26
As shown in FIG.
(lb') is held on the wall part. Motor 29, 2
9' and pumps 33, 33' are both hard tube parts 1b
, 1b' may not be provided respectively, but a single motor and pump may be used. Further, a control device may be provided to automatically control the drive of the fan and motor 29 (29') and pumps 33 and (33').

FIG. 11 shows an example of another method for preventing condensation water, in which the heat transfer tube 1 has a hard outer tube 40 made of hard vinyl chloride or the like and a bag-shaped inner tube made of a flexible thin material. 41
An inner tube 41 is provided between the outer tube 40 and the inner tube 41.
flexible communication bags 42, 42.
An intermediate layer 43 consisting of... is provided. When the fan is out of operation, as shown in FIG. 12, the communication bags 42, 42. Inflate the inner tube 41 and outer tube 4.
By forming an air layer between the inner tube 41 and the inner tube 41 to achieve a heat insulating effect, the temperature on the inner surface of the inner tube 41 is prevented from becoming low and dew condensation is prevented.

At this time, condensation may occur between the inner tube 41 and the outer tube 40, but when restarting the operation next time, the communication bag 42
Since the air is removed and the inner tube 41 is almost inscribed in the outer tube 40, the condensed water generated in this gap will not be mixed into the air supplied to the room. Further, this condensed water serves to bring the inner tube 41 into close contact with the outer tube 40.

Figures 13 and 14 have the same configuration as the previous example, but are used differently. In other words, while driving,
The air in the inner tube 41 is removed, and the inner tube (7) is brought into close contact with the outer tube 40 to allow ventilation through the inner tube. This point is the same as the previous usage. However, during rest, the inner tube 41 is inflated and inscribed in the outer tube 40, and all the processing air is exhausted. Therefore, no condensation occurs between the inner tube and the outer tube, and in the next operation, the air in the inner tube is removed (if there is condensed water, it remains inside) and treated air is sent into the outer tube.
Humidification does not occur when starting operation.

[Brief Description of the Drawings] Fig. 1 is an explanatory diagram of a heat exchanger tube, Fig. 2 is a sectional view of a conventional heat exchanger tube, Fig. 3 is an explanatory diagram of a heat exchanger tube according to the present invention, and Fig. 4 is a sectional view thereof. , Figures 5 and 6 are explanatory diagrams of usage, Figure 7
Figure 8 is a reference diagram of the power supply, Figures 9 and 10 are illustrations of the physical dehumidification method, Figures 11, 12, 13, 1
FIG. 4 is a cross-sectional view of the heat exchanger tube. 1... Heat exchanger tube 2... Water droplet 3... Electric heater 1
0...Dumper 11...Hwang agent Patent attorney Takehiko Matsumoto (8) Figure 4 43 Procedural amendment σgen 1, Indication of the case 1984 Tokuho Tei 084479 No. 2, Name of invention underground Dehumidification device for buried heat exchanger tubes 3, relationship with the case of the person making the amendment Patent applicant Address: 1048 Kadoma, Kadoma City, Osaka Prefecture Name (5)
83) Matsushita Electric Works Co., Ltd. Representative Ikuo Kobayashi 4, (e-embedded "Figures 7 and 8 are corrected as power supply illustration diagram 1. 1. Indication of the case 1984 Patent Application No. 084479 2. Name of the invention Dehumidification device for underground heat exchanger tubes 3. Relationship with Hanyu who made the amendment Patent applicant Location 1048 Kadoma, Kadoma City, Osaka Name ( 5
83) Matsushita Electric Works Co., Ltd. Representative Ijiwatari Iku Kobayashi 4, No agent il 6, Specification subject to amendment and drawings 7, Contents of amendment (1) “Exclusion, J” on page 8, line 20 of the specification Insert ``As seen in Figure 13'' between ``Inner tube''. (2) In the first line of page 9 of the specification, the phrase "inner tube in close contact with" is corrected to read "deflated at the bottom of the tube." (3) Insert "as shown in Figure 14" between "inflate" and "outer tube 40J" on page 9, line 3 of the specification. (4) In the attached drawings, Figure 13 is corrected as shown in the attached sheet. Figure 13

Claims (1)

[Claims] (1) A dehumidifying device for removing moisture inside a heat exchanger tube buried underground, characterized in that an electric heater is provided on the inner surface of the heat exchanger tube.