JPH0424927Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a hot air supply tube for supplying warm air into greenhouses, such as in greenhouse cultivation.

(Prior art) Conventionally, in greenhouse cultivation, especially in winter and other periods when the outside temperature is low, warm air generated by coal-fired or kerosene-fired heating is sent to heat the inside of the greenhouse, and the outside air is heated. By significantly raising the temperature inside the greenhouse, we aim to promote crop growth and improve crop cultivation efficiency. In order to distribute this hot air throughout the greenhouse, tubes made of plastic film such as polyethylene are usually used (with or without small holes at appropriate intervals). For example, as shown in FIG. 5 (plan view), a greenhouse is installed and used. To explain this diagram, tube C, which has one end attached to hot air generation source B and is arranged meanderingly or linearly inside house A, is for feeding hot air in the direction of the arrow. The hot air is discharged from a small hole D provided in the tube in stages, and the hot air is fed to the tip of the tube (no prior literature is particularly presented).

(Problems to be Solved by the Present Proposal) However, when the polyethylene tube used as described above is used to supply hot air into the greenhouse, there are the following problems.

In other words, although theoretically speaking, the temperature of the hot air sent through the tube decreases as it approaches the tip of the tube,
Particularly in the case of the above-mentioned polyethylene tube, the temperature of the hot air drops significantly between when it is at the proximal end of the tube (the part where it is attached to the hot air generation source) and when it is at the tip of the tube. Therefore, the temperature inside the house near where the tube base is located is relatively high because the temperature of the hot air itself is sufficiently high.
The growth rate of the crops is also good, but on the other hand, the room temperature inside the greenhouse near the tip of the tube is significantly lower than the temperature inside the greenhouse near the base end because the temperature of the hot air itself is considerably lower. This inevitably causes negative effects such as poor crop growth. As described above, extreme differences in temperature distribution within the greenhouse are not desirable in terms of greenhouse cultivation, and an important issue in greenhouse cultivation is how to achieve a uniform temperature distribution throughout the greenhouse.

As a result of various studies regarding the above-mentioned issues, the inventor of this invention found that the problem of hot air drop due to the hot air supply means caused by the use of conventional polyethylene tubes was caused by the tube's constituent material itself. We came to the conclusion that this is because there is no function to retain the heat of the warm air inside the tube, and on the contrary, the heat held by the hot air is more likely to be dissipated from the tube wall to the outside.

(Means for solving the problem) This proposal was devised in view of the above-mentioned problems. This hot air blower can deliver warm air with little temperature difference to any place in the house, and can therefore heat the house so that the temperature distribution is almost uniform throughout the house. The idea is to provide a supply tube.

The structure of this proposal will be explained below.

That is, the gist of the present invention is a hot air blower characterized by forming a laminated material in which a metal vacuum-deposited layer is provided on one side of a plastic film into a tube shape so that the vapor-deposited surface becomes the inner surface. It's in the supply tube.

Next, a basic embodiment of the present invention will be explained based on FIG.

This drawing is an enlarged sectional view taken perpendicularly to the length direction of the tube of the present invention in an expanded state when hot air is supplied.

In the drawing, 1 is the tube body,
This is formed into a tube shape in which a metal vacuum-deposited layer 3 is provided on one side of a plastic film 2, and the vapor-deposited layer 3 is located on the inner surface of the tube. Reference numeral 5 denotes a heat-sealed portion, which can also serve as a mounting portion 6 for a support member or the like within the house. Further, numeral 4 indicates holes drilled in the tube at appropriate intervals. Although it is not necessary to provide this small hole, it is preferable if the direct effect of hot air supply is expected to be more quickly spread throughout the house. Although not shown, the tip of the tube is usually open, but it may be closed.

The above embodiment is formed into a tube shape from a laminated material 7 (an expanded version of the above embodiment) as shown in FIG. 2. Non-vaporized part 8 of both ears
(The exposed parts of the plastic film) are mutually polymerized and heat-sealed to form a predetermined tube body.

In addition, as a plastic film, polyethylene, polypropylene, or polyester (in particular, polyester is most suitable from the viewpoint of toughness, etc., but because it lacks heat sealability,
The metal vacuum-deposited layer is made by vacuum-depositing a metal such as aluminum, and the thickness of the metal vacuum-deposited layer is approximately 0.04 to 0.05 μm. It is.

Next, FIG. 3 shows an application example of the present invention, in which the laminated material 7 shown in FIG.
is integrally formed on one side of a polyolefin flat woven fabric (polyolefin cloth) 9 with a polyolefin laminate layer 10 interposed therebetween as a constituent material and molded into a tube shape.

FIG. 4 shows a partially enlarged sectional view of the constituent materials used in the embodiment of FIG. 3, in which a polyolefin flat woven fabric 9 wider than the width of the laminate 7 is laminated and bonded with a polyolefin laminate layer 10.
The exposed portions 11 of the polyolefin layer on both ears will be used for heat sealing when forming a tube. In this embodiment, it is also preferable that holes 4 are bored at appropriate intervals, and 5 is a heat-sealed part, and this part also serves as a mounting part 6 for a support member in the house. It's watery.

(Function) The proposed tube constructed as described above is installed in the house A as shown in Fig. 5, and the proposed tube (as shown in C on the drawing) is connected to the hot air generation source (heater) B. Correspondence) By attaching the tip and arranging it as shown in the diagram, the hot air forced into the tube will pass through the tube, and the hot air will flow through the hole drilled in the tube (corresponding to D in the diagram). The wind is discharged. Since the inner surface of the tube faces the metal vacuum-deposited layer, the hot air that is sent through the tube is sent through the tube without radiating the heat to the outside of the tube due to the heat ray reflection effect.

By the way, according to experience, when using the tube of this invention, compared to using a conventional polyethylene tube (temperature reduction rate between the tube base and tip is 20%), the hot air at the tube base and tube tip is reduced. can suppress the temperature drop to about 10%,
It turned out to be an energy-saving tube.

(Effects) This proposal is constructed as described above, and has the following effects.

(1) Since the tube of this invention has a metal vacuum-deposited layer on its inner surface, the presence of the vapor-deposited layer allows the heat rays to be efficiently reflected within the tube and not to be dissipated outside the tube, allowing hot air to be delivered. The temperature of the hot air inside the house is difficult to drop, so there is little difference in the temperature of the hot air between the base end of the tube (the part where it is attached to the hot air fan) and the tip of the tube, and the inside of the house is evenly heated in every corner. This makes it extremely advantageous for cultivation in greenhouses.

(2) In addition, in the tube of the present invention, the strength of the tube itself is improved when the base material is composited with polyolefin flat woven fabric as shown in Fig. 3. There is little deterioration in strength and durability in use is good.

(3) Furthermore, since the constituent material of the proposed tube is flexible, it is necessarily able to withstand flexible movement and handling; There is no deterioration or breakage of the material, and there is no deterioration of its heat ray reflection function, so it can be used for a long time.

(4) In addition, although the tip of the proposed tube is normally used in an open state, if a closed one is used, the drop in hot air supply pressure will be smaller, and the hot air discharged from the small hole will be discharged more strongly. Even with the small hole at the tip, hot air is sufficiently discharged, making it possible to more reliably send warm air into the greenhouse.

[Brief explanation of drawings]

Figure 1 is an enlarged sectional view taken at right angles to the length direction of the proposed tube in the expanded state when hot air is supplied;
The figure is a cross-sectional view of the constituent material of the tube in Figure 1, and
The figure is a partially enlarged cross-sectional view of another embodiment, FIG. 4 is a partially cut-away enlarged cross-sectional view of the constituent material of the tube in FIG. 3, and FIG. 5 is an example of how the tube is arranged in the house. FIG. 1...Tube body, 2...Plastic film, 3...Metal vacuum deposited layer, 4...Hole, 5...
Heat seal part, 6...Mounting part, 7...Laminated material,
8... Anchor coat layer, 9... Polyolefin flat woven fabric, 10... Polyolefin laminate layer, 11... Exposed area of polyolefin, A...
...House, B...Warm air source, C...Tube,
D...Small hole.

Claims (1)

[Claims for Utility Model Registration] (1) A hot air supply characterized by forming a flexible sheet material having a metal vacuum-deposited layer on one side into a tube shape so that the vapor-deposited surface is the inner surface. Tube for. (2) Utility model registration The hot air supply tube described in claim 1 is characterized in that the flexible sheet material is a plastic film with a metal vacuum-deposited layer provided on one side. Hot air supply tube. (3) Scope of Utility Model Registration In the hot air supply tube described in claim 1, the flexible sheet material is a plastic film with a metal vacuum-deposited layer on one side, and a polyolefin flat woven fabric. A hot air supply tube characterized by being laminated and bonded. (4) A hot air supply tube according to any one of claims 1 to 3 of the claims for utility model registration, characterized in that holes are bored at appropriate intervals in the tube. Feeding tube.