JPH09149734A - Heating device in greenhouse - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating device in a greenhouse without requiring a boiler or a forced feeding pump and without wasting the heat of a heat receiving pipe at all by arranging the heat receiving pipe connected through heat generating parts located in a place at a low level and gradient parts to nearly horizontal ends, having a cut space and located at a high place on the cultivation ground surface of a heat reserving greenhouse. SOLUTION: This heating device in greenhouse is obtained by arranging a heat receiving pipe 3 connected from heating parts (3a) having heating elements 14 therein through rising gradient parts (3b) and (3b) to left and right nearly horizontal ends (3c) and (3c) having a cut space (3d) and located at a high place on the cultivation ground surface of the heat reserving greenhouse 1. The temperature of the heat receiving pipe 3 generating heat through a heating medium heated with the heating elements 14 is sensed with a temperature sensor 23 to control the heating elements 14 through an energizing controller.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warming device in a greenhouse installed in a heat retaining house for growing plants or cultivating fruits.

[0002]

2. Description of the Related Art Conventionally, various warming devices for greenhouses installed in a warm house have been proposed. Therefore, generally, the conventional heating device uses a boiler installed outside the heat-retaining house as a heating means, and a heating medium such as oil or water heated by the boiler uses a pump for heat exchange pipes. Have been pumped to. Then, the heat exchange tube is drawn into the heat insulation house from the outside of the heat insulation house, is annularly and planarly arranged on the cultivation ground, and the heating medium in the heat exchange tube circulates in one direction.

However, the conventional heating device has the following drawbacks. Since a boiler and a pump are used, it is necessary to check ignition, and fuel cost and equipment cost are required. Since the heat exchange tubes are arranged so as to be drawn in from the outside of the heat insulation house, heat is wastefully released outside the room. Since the heat exchange tubes are annularly and planarly arranged on the cultivation ground, the boiler and the pump must be made larger as the heat exchange tubes become longer or the diameter thereof becomes larger. Therefore, fuel costs and facility costs are required for the above reasons.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the prior art, the first object of the present invention is that fuel cost and facility cost are not so high. The second purpose is not to waste the heat released from the heat exchange tubes (heat receiving tubes). The third purpose is that it can be easily installed in a heat insulation house, and when installed, even if one heat generating part is removed from the heat receiving pipe for repair or other reasons, the other one continues to be used as it is. In addition, a fourth object is to obtain a warming device in a greenhouse in which a heat generating portion can be reasonably configured and a heating medium can be naturally convected to the entire heat receiving tube.

[0005]

A warming device for greenhouses according to the present invention comprises a heat generating portion 3a which is located at a low position and which internally houses a heat generating element 14, and an ascending slope portion which is connected to the left and right of the heat generating portion 3a. Three
b, 3b and left and right substantially horizontal end portions 3c, 3c which are respectively connected to the left and right upslope portions 3b, 3b and have a notch space 3d and are located at a high place. Of the heat receiving tube 3 disposed on the cultivation ground, the heating controller 14 electrically connected to the heating element 14 via a power supply cord, and the power supply controller 24 and electrically connected, and
A temperature sensor 23 that directly or indirectly detects the temperature of the heat receiving tube 3 that generates heat via the heating medium 17 heated by the heating element 14 is provided.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will now be described in detail with reference to the examples shown in the drawings. 1 to 6 show a warming device X in a greenhouse showing a first embodiment of the present invention. 1
Is a heat insulation house for plants and cultivation. This warm house 1
A doorway 2 is provided in the.

Reference numeral 3 denotes a metal heat receiving tube for heat exchange, which is arranged in a non-loop shape in the heat insulating house 1. This heat receiving tube 3
A heat generating portion 3a that internally houses a heat generating element, which will be described later, and this heat generating portion 3a.
Up and down slope portions 3b and 3b, which are respectively connected to the left and right of the left and right sides, and left and right substantially horizontal end portions which are respectively connected to the left and right up and down slope portions 3b and 3b and which have a notch space 3d and are located at a high place. 3c and 3c.

That is, as indicated by the reference numerals in FIG. 1, points a to b and points a to c are upward slopes directed inward, respectively, while points b and c are substantially horizontal. Although it is in the state, the left and right substantially horizontal end portions 3c, 3c are not a series but are separated from each other with a cutout space 3d through which a person can pass.

However, the entire shape from the heat generating portion 3a to the substantially horizontal end portion 3c on one side is formed in a frame shape, a bay shape, or an arc shape. Here, "substantially horizontal end 3
“C” does not mean merely the end of an object, but means that the end of each of the left and right substantially horizontal portions located at a high position of the heat receiving tube 3 has an end face via the cutout space 3d. Therefore, the left and right substantially horizontal end portions 3c do not necessarily have to have the same length. Further, when the shape of the substantially horizontal end portion 3c is viewed from the plane side, the shape such as a linear shape or an arc shape is not particularly limited.

Reference numeral 4 denotes a plurality of support bars used for imparting the above-mentioned gradient to the heat receiving tube 3. These support bars 4 correspond to the portions that support the heat receiving tubes 3, and are tentatively long support bars 4a and short dimension support bars 4a.
b. The supporting relationship between the support bar 4 and the heat receiving tube 3 will now be described. As shown in FIG.
Is a support bar main body 6 whose lower end is inserted into the cultivation ground 5 in the heat-retaining house 1, and is provided at the upper end of the support bar main body 6 such that the position thereof can be adjusted in the vertical direction, and is loosely fitted to the heat receiving tube 3. It is composed of a cylindrical supporting portion 7 which is fitted with the cylindrical supporting portion 7. Further, the vertical position adjustment of the T-shaped support portion 7 as a whole is performed by adjusting a plurality of adjustment engagements formed at the upper end portion of the support bar main body 6 and the support portion 7 at predetermined intervals in the vertical direction. It comprises a hole 8 and an engagement pin 9 which is optionally inserted into one of these engagement holes 8.

In this embodiment, a total of two heat generating portions 3a are provided along the non-looped arrangement line of the heat receiving tube 3 as shown in FIG.

Therefore, the heat generating portion 3a will be described with reference to FIG. 5 (for convenience, one heat generating portion 3a will be described). The heat generating portion 3a is provided on the right and left upslope portions 3 of the heat receiving pipe 3 via a plurality of connecting members 12 such as joints and couplings.
b, 3b, a heating tube main body 13 which is detachably connected, and a heating element 14 horizontally provided in the heating tube main body 13
A pair of insulative cylindrical support portions 15 provided integrally with the heating element 14 and the heating tube body 13, and the heating element 14
And two energizing cords 16 each having an energizing lead wire 16a electrically connected to. It is desirable that the heat generating portion 3a of the connecting tool 12 be attachable to and detachable from the left and right upslope portions 3b and 3b, but in the present embodiment, a screwable coupling is adopted. The heating element 14 is supported by a pair of insulating tubular supporting portions 15, and the heating medium 1 such as water is
7 in the desired position. The heating medium 17 is hot water heated by the heating element 14 in this embodiment.

By the way, in the present embodiment, the heating element 14 employs a far-infrared radiation tube which radiates far-infrared rays to the heating medium 17. The far infrared ray emitting tube 14 is composed of, for example, a synthetic resin base material and powdery far infrared ceramics evenly dispersed in the synthetic resin base material. Of course, the heating element 14 is not limited to the radiation tube, and may be, for example, a porous plate-shaped body formed of a heat-resistant material and emitting far infrared rays.

Next, 20 is an upslope portion 3 on the left and right of the heat receiving tube 3.
When a pair of left and right valves respectively provided at the connection ends of b and 3b close these valves 20, 20, the flow of the heating medium 17 in the left and right upslope portions 3b, 3b is shut off, and the heat receiving tube 3 Does not leak outside.

Reference numeral 21 is a discharge member which is provided on the upper surface of the outer peripheral wall of one substantially horizontal end 3c of the heat receiving tube 3 and releases a part of the expanded heating medium 17 or the pressure of the heating medium 17. In this embodiment, a spherical float 21 that fits with a fitting portion 22 formed in an annular shape on the upper surface of the outer peripheral wall is used. The formation of the fitting portion 22 and the float 21 are performed by the heat receiving tube 3
It is not always necessary depending on the temperature of the heating medium 17 flowing inside. Further, instead of forming the fitting portion 22 and the float 21, it is possible to provide a heating medium 17 and a discharge valve for releasing the pressure to the outside on the outer peripheral wall of the substantially horizontal end portion 3c of the heat receiving tube 3.

Reference numeral 23 is a temperature sensor provided at an appropriate position of the heat receiving tube 3, preferably on the left or right substantially horizontal end portion 3c. The temperature sensor 23 is electrically connected to the energization controller 24 as shown in FIG. 3, always detects the heat radiation temperature of the heat receiving tube 3, and sends the detected signal to the energization controller 24.
The energization controller 24 has a microcomputer (not shown), and the heating element 1 is connected via the energization cord 16 described above.
A calculation process is performed to determine whether or not to continue energizing 4. The temperature sensor 23 does not necessarily have to be provided directly on the heat receiving pipe 3, but may be provided at an appropriate location of the heat retaining house 1, for example. Reference numeral 25 is a water supply port portion provided at an appropriate position of the heat receiving tube 3, and water to serve as the heating medium 17 is appropriately supplied to the water supply port portion 25 from a faucet (not shown).

In the above structure, when the heating element 14 is energized from the energization controller 24 through the energizing cord 16, the heating element 14 radiates far infrared rays to the heating medium 17. Then, the heating medium 17 in the heat generating portion 3a of the heat receiving pipe 3 located at a low position is heated, and the heated heating medium 17 naturally convects to the left and right upslope portions 3b and 3b, respectively. As a result, the heating medium 17 in the substantially horizontal end portion 3c located at a high position of the heat receiving tube 3 is gradually warmed. When the heat receiving pipe 3 is entirely warmed by the heating medium 17, heat is efficiently exchanged with the air in the heat insulating house 1.

However, if the heating medium 17 expands greatly now, the float 21 in the fitting portion 22 of the heat receiving tube 3 is lifted by the heating medium 17, and a part of the heating medium 17 is removed from the fitting portion 22. Overflows.

The temperature sensor 23 constantly detects the temperature of the heat generating tube 3, detects if the heat generating tube 3 has generated heat above a set temperature, and sends a detection signal to the energization controller 24. The energization controller 24 arithmetically processes the detection signal and suspends energization of the heating element 14.

By the way, when one heating element 3a is sufficient or when one heating element 3a needs to be replaced for repair or the like, one of the heating elements 3a is closed after closing the left and right valves 20. Remove. Then, the other heating element 3a is brought into a connected state (in the second embodiment, the other heating element 3a and the valves on the left and right thereof may be left open as they are. However, the left and right valves on which the heating element 3a is removed are used. Is closed.). Then, the left and right valves 20, 20 are opened again, and the energization controller 24 energizes the heating element 14.

[0021]

[Embodiment] Next, FIGS. 7 and 8 show the main part of a heating device X1 in a greenhouse showing a second embodiment of the present invention. 9 and 10 show a heating device X in a greenhouse showing a third embodiment of the present invention.
2. In the description of these embodiments, the same parts as those of the first embodiment of the present invention will be designated by the same reference numerals and overlapping description will be omitted.

First, the second embodiment is mainly different from the first embodiment in that the right and left upslope portions 3 of the heat receiving pipe 3A are different.
The connecting ends 31 and 31 of b and 3b are formed into a bifurcated shape, and the connecting tool 12 is connected to these connecting ends 31 and 31, respectively.
That is, the two heat generating parts 3a and 3a (the same reference numerals are used for convenience) via A are detachably provided. Even with this configuration, there are substantially the same actions and effects as those of the first embodiment.

Next, the third embodiment is mainly different from the first embodiment in that the upslope portions 3b, 3b supported by the support bar 4B and continuously provided on the left and right sides of the heat generating portion 3a, respectively.
b is not necessarily formed in a frame shape, a bay shape, an arc shape, or the like, and is a simple linear point, and the left and right slope portions 3b,
3b are not connected to each other at substantially horizontal ends, and the float 21B as a discharge member is provided in a fitting portion 22B formed at the tip of one (left) upslope 3b. In addition, the temperature sensor 23B that directly detects the temperature of the heat receiving tube 3B that generates heat via the heating medium 17 that is heated by the heating element 14 and the water supply port 25B are provided on the one side (left side) of the upslope part 3b. This is the point where it was attached at an appropriate point.

In this embodiment, in order to make the heat-retaining effect of the heat-retaining house 1 similar to the heat-retaining devices X and X1 of the first and second embodiments, the heat-retaining device X2 is provided in the heat-retaining house 1. It is necessary to install at least two heat sink tubes 3B,
A heat generating portion 3a which is located at a low position and which internally houses the heat generating element 14
And an upslope portion 3b which is continuously provided on the left and right of the heat generating portion 3a,
3b, the heating medium 17 can be naturally convected throughout the heat receiving tube 3B.

In the heating devices X and X1 of the first and second embodiments, the heat receiving tubes 3 and 3A are provided with an upward slope by using two or more support bars 4 having different lengths. In addition, in the heating device X2 of the third embodiment, the heat receiving tube 3
B uses the support bar 4B whose length is adjustable to give an upslope, but depending on the thing to be cultivated in the heat-retaining house 1 or the plant to be grown, the support bar 4 or 4B is not used. You may give a gradient to the cultivation ground 5.

Further, in the heating device X2 of the third embodiment,
A plurality of heat generating portions 3a of the heat receiving tube 3B are provided similarly to the second embodiment, and the connecting end portions of the ascending slope portions 3b and 3b facing each other are formed in a bifurcated shape, and the connecting tools are respectively connected to these connecting end portions. The heat generating part 3a may be detachable via the.

[0027]

As is clear from the above description, the present invention has the following effects. (1) Since no boiler or pressure pump is used, confirmation of ignition is not required, and fuel cost and facility cost are not so high. (2) The heat receiving tube can be completely arranged in the heat-retaining house without providing an externally drawn portion. Therefore, the heat released from the heat receiving tube is not wasted at all. (3) For example, the heat receiving tube can be easily arranged only by providing an inclination on the cultivation ground. Further, when installed, even if one heat generating part is removed from the heat receiving tube for repair or the like, the other one can be used as it is. (4) The heat generating portion can be rationally configured to allow the heating medium to naturally convect over the heat receiving tube. (5) Since the temperature sensor electrically connected to the energization controller is provided, it is possible to always maintain the desired temperature in the heat retaining house. (6) If the heating element is a far-infrared radiation tube that radiates far-infrared rays into a fluid serving as a heating medium in the heat-receiving tube, or if it is a porous plate-shaped body that radiates far-infrared rays, the heating portion efficiently generates heat. can do. (7) In the case of the embodiment in which the heat receiving tube is supported via a plurality of support bars whose position can be adjusted in the vertical direction, the height of the heat receiving tube corresponding to the plants grown in the heat-retaining house or the fruits to be cultivated is The slope (tilt angle) can be freely determined.

[Brief description of the drawings]

1 to 6 are explanatory views showing an embodiment of the invention using the first embodiment of the present invention. 7 and 8 are explanatory views of the second embodiment of the present invention. 9 and 10 are explanatory views of the third embodiment of the present invention.

FIG. 1 is an explanatory view of a first embodiment from a plane side.

FIG. 2 is an explanatory view from a perspective side.

FIG. 3 is a schematic explanatory diagram of a main part.

FIG. 4 is an explanatory diagram of a main part (support bar).

FIG. 5 is an explanatory diagram of a main part (heat generating part).

FIG. 6 is an explanatory view showing a state in which one heat generating portion is removed from the heat receiving tube in FIG. 1.

FIG. 7 is an explanatory view of the second embodiment from the plane side.

FIG. 8 is an explanatory view of a state where one heat generating portion is removed from the heat receiving tube in FIG. 7.

FIG. 9 is a schematic explanatory view of a third embodiment.

FIG. 10 is an explanatory view of the third embodiment from the perspective side.

[Explanation of symbols]

X, X1, X2 ... Heating device 3, 3A, 3B ... Heat receiving tube,
4, 4B ... Support bar, 5 ... Cultivated ground, 3a ... Heat generating part, 3
b ... Gradient portion, 3c ... Substantially horizontal end portion, 12, 12A ... Connection tool, 13 ... Heating tube main body, 14 ... Heating element, 15 ... Cylindrical support portion, 16 ... Energizing cord, 17 ... Heating medium, 20 ... Valve , 21, 21B ... Ejection member, 22, 22B ... Fitting part,
23, 23B ... Temperature sensor, 24 ... Energization controller, 31
… Connection end.

Claims (4)

[Claims] 1. A heat generating portion 3a which is located at a low position and which internally houses a heat generating body 14, upslope portions 3b and 3b connected to the left and right sides of the heat generating portion 3a, and left and right upslope portions 3b and 3b.
b and the left and right substantially horizontal end portions 3c and 3c, which are respectively connected to each other and have a notch space 3d and are located at a high place,
A heat receiving tube 3 arranged on the cultivation ground of the heat retaining house 1, an energization controller 24 electrically connected to the heating element 14 via an energization cord, and an electricity connection with the energization controller 24, Further, the heating device in the greenhouse is provided with a temperature sensor 23 that directly or indirectly detects the temperature of the heat receiving tube 3 that generates heat via the heating medium 17 heated by the heating element 14. 2. The heat generating portion 3a according to claim 1, wherein at least two heat generating portions 3a are detachably provided from the left and right ascending slope portions 3b and 3b of the heat receiving pipe 3 through the connector 12, and the left and right ascending slopes are provided. A warming device in a greenhouse, characterized in that valves 20 for temporarily shutting off the heating medium 17 are provided opposite to each other at connection ends of the parts 3b, 3b. 3. A heat generating portion 3a which is located at a low position and which internally houses a heat generating element 14, and upslope portions 3b and 3b which are connected to the left and right sides of the heat generating portion 3a, are arranged on the cultivation ground of the heat retaining house 1. The heat receiving tube 3B provided, an energization controller 24 electrically connected to the heating element 14 via an energizing cord, and an energization controller 24 electrically connected to the heating element 14 and heated by the heating element 14. Temperature sensor 23B that directly or indirectly detects the temperature of the heat receiving tube 3B that generates heat via the heating medium 17.
And a heating device in a greenhouse which is provided with. 4. The heating device according to claim 3, wherein the heating element 14 is a far-infrared radiation tube that radiates far-infrared rays to a fluid serving as a heating medium 17 in the heat receiving tube 3B. .