Heating device

Abstract

To provide a heating device that can efficiently heat the inside of a greenhouse regardless of a circulation amount of hot water.SOLUTION: A heating device 1 that is installed on a farm in a greenhouse H and is used for heating its periphery comprises: a tubular member 2 which is capable of circulating hot water from one end part 2a to the other end part 2b; and driving means 5 for rotating the tubular member 2 about an axis by the driving force of a motor M, where the device is capable of heating the inside of the greenhouse by rotating the tubular member 2 while circulating hot water through the tubular member 2 by the driving means 5.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a heating device that is installed on a farm in a greenhouse to heat the surroundings. [Background technology]

[0002] For example, in farms inside vinyl greenhouses, heating devices are installed to heat the greenhouse and increase the temperature. As a conventional heating device, for example, as disclosed in Patent Document 1, a device has been proposed in which pipes are installed inside the greenhouse and hot water is circulated through the pipes to increase the temperature inside the greenhouse. The pipes of such conventional heating devices are arranged along the ground surface inside the greenhouse, so that the area around the crops planted on the farm can be heated. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-215182 Summary of the Invention [Problem to be solved by the invention]

[0004] However, while conventional heating devices can heat the inside of greenhouses such as vinyl greenhouses, there has been a recent demand for improved heating efficiency, leading to a demand for efficient heating of the inside of greenhouses regardless of the amount of hot water circulating in the piping.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a heating device that can efficiently heat the inside of a greenhouse regardless of the amount of hot water flowing through it. [Means for solving the problem]

[0006] The invention described in claim 1 is a heating device that is installed on a farm inside a greenhouse to heat the surrounding area, and is equipped with a tubular member through which warm water can flow from one end to the other, and a driving means for rotating the tubular member around its axis, so that the greenhouse can be heated by rotating the tubular member with the driving means while circulating warm water inside the tubular member.

[0007] The invention described in claim 2 is characterized in that, in the heating device described in claim 1, it comprises a first fixed member attached to one end of the tubular member and having a supply port formed therein for supplying hot water into the tubular member, and a second fixed member attached to the other end of the tubular member and having a discharge port formed therein for discharging the hot water that has circumferentially flowed through the tubular member, and the one end and the other end of the tubular member are slidable circumferentially relative to the first fixed member and the second fixed member which are installed in a fixed state, and are rotatable around an axis.

[0008] The invention described in claim 3 is characterized in that, in the heating device described in claim 2, the tubular member is arranged at a downward incline from the one end to the other end, and a sealing member is interposed between the second fixing member and the other end of the tubular member.

[0009] The invention of claim 4 is characterized in that in the warming device of claim 1, the tubular member is made of a stainless steel pipe.

[0010] The invention of claim 5 is characterized in that in the warming device of claim 1, the driving means is configured to have a motor, and the tubular member is rotated around its axis by the driving force of the motor.

[0011] The invention described in claim 6 is characterized in that, in the heating device described in claim 5, a ring-shaped gear is formed circumferentially on the outer peripheral surface of the tubular member, and the driving means has a driving gear that rotates together with the output shaft of the motor and a driven gear that engages with the driving gear and the ring-shaped gear, and by driving the motor to rotate the driving gear, the ring-shaped gear is rotated via the driven gear, and the tubular member is rotated around its axis.

[0012] The invention of claim 7 is characterized in that the warming device of claim 1 further comprises support rollers that rotatably support the one end side and the other end side of the tubular member, respectively. [Effects of the Invention]

[0013] According to the invention of claim 1, the greenhouse is equipped with a tubular member through which hot water can flow from one end to the other end, and a driving means for rotating the tubular member around its axis, and the greenhouse can be heated by rotating the tubular member with the driving means while hot water is flowing through the tubular member.Therefore, even if the amount of hot water flowing is reduced, the heat of the hot water can be effectively transferred to the surroundings, and the greenhouse can be heated efficiently regardless of the amount of hot water flowing.

[0014] According to the invention of claim 2, the device comprises a first fixed member attached to one end of a tubular member and having a supply port formed therein for supplying hot water into the tubular member, and a second fixed member attached to the other end of the tubular member and having a discharge port formed therein for discharging hot water that has circumferentially passed through the tubular member, and the one and other ends of the tubular member are able to slide circumferentially relative to the first and second fixed members which are installed in a fixed state and rotate around the axis, thereby enabling the supply of hot water from the supply port and the discharge of hot water from the discharge port to be carried out smoothly and reliably.

[0015] According to the invention of claim 3, the tubular member is arranged at a downward incline from one end to the other end, and a sealing member is interposed between the second fixing member and the other end of the tubular member.Therefore, the inclination of the tubular member allows hot water to flow smoothly without stagnation, and the sealing member prevents hot water from leaking between the second fixing member and the other end of the tubular member.

[0016] According to the invention of claim 4, the tubular member is made of a stainless steel pipe, and by circulating hot water through the stainless steel pipe, which has a relatively high rigidity and thermal conductivity, the inside of the greenhouse can be heated efficiently.

[0017] According to the invention of claim 5, the driving means is configured to have a motor, and the tubular member is rotated around its axis by the driving force of the motor, so that the rotation speed of the tubular member can be easily adjusted and the tubular member can be rotated reliably.

[0018] According to the invention of claim 6, a ring-shaped gear is formed circumferentially on the outer peripheral surface of the tubular member, and the driving means has a driving gear that rotates together with the output shaft of the motor and a driven gear that engages with the driving gear and the ring-shaped gear.By driving the motor to rotate the driving gear, the ring-shaped gear is rotated via the driven gear, and the tubular member is rotated around its axis, so that the motor can be arranged in any position.

[0019] According to the invention of claim 7, the tubular member is provided with support rollers that rotatably support one end side and the other end side, respectively, so that the tubular member can be well supported and prevented from bending radially. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a schematic diagram showing an entire greenhouse heating system to which a heating device according to an embodiment of the present invention is applied; [Figure 2] FIG. 10 is a front view showing the heating device; [Figure 3] Cross section of line III-III in Figure 2 [Figure 4] FIG. 10 is a right side view showing the heating device [Figure 5] Cross section of line VV in Figure 4 [Figure 6] FIG. 10 is a schematic diagram showing a driving means (a driving gear G2 connected to a ring-shaped gear G1) according to another embodiment of the present invention. [Figure 7] FIG. 10 is a schematic diagram showing a driving means (using a transmission belt Q) according to still another embodiment of the present invention. [Figure 8] FIG. 10 is a schematic diagram showing yet another embodiment of the present invention (in which a seal member is disposed on the supply flow path side). DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. A heating device 1 according to this embodiment is installed on a farm inside a greenhouse H such as a vinyl greenhouse to heat the surrounding area, and is applied to a greenhouse heating system as shown in Fig. 1. This applied heating system is configured to include the heating device 1 installed inside the greenhouse H, a supply flow path L1 consisting of a supply pipe for supplying hot water to the heating device 1, a discharge flow path L2 consisting of a discharge pipe for discharging the hot water from the heating device 1, and a circulation flow path L3 consisting of a pipe for circulating the hot water discharged in the discharge flow path L2.

[0022] Of these, an on-off valve V is attached to the supply flow path L1, and a pump P is attached to the circulation flow path L3. The heating system also includes a hot water boiler 7 having a burner 6 and a hot water reservoir 8, and by driving the pump P with the on-off valve V open, hot water supplied from the hot water reservoir 8 of the hot water boiler 7 is circulated back to the hot water reservoir 8 via the supply flow path L1, the heating device 1, the discharge flow path L2, and the circulation flow path L3.

[0023] In this way, the hot water heated in the hot water boiler 7 flows through the supply flow path L1, the heating device 1, the discharge flow path L2, and the circulation flow path L3, before returning to the hot water boiler 7 to be heated, and then being supplied to the supply flow path L1 again and circulated. Then, in the process of circulating the hot water heated in the hot water reservoir 8, as it flows through the heating device 1 in the greenhouse H, the heat of the hot water is transferred to the greenhouse H, thereby heating it.

[0024] The smoke generated in the hot water boiler 7 flows through the exhaust smoke flow paths E and L5 and is discharged from the chimney, and part of the smoke flowing through the exhaust smoke flow path E flows through the exhaust flow path L4 and is discharged from the chimney. In addition, each of the exhaust flow paths L4 according to this embodiment is equipped with a fan F, so that part of the smoke generated in the hot water boiler 7 is forcibly sent into the greenhouse H to heat the greenhouse H, and then discharged from the chimney.

[0025] The heating device 1 of this embodiment is installed on a farm inside a greenhouse H to raise the atmospheric temperature inside the greenhouse H, and as shown in Figures 2 to 5, is configured with a cylindrically formed tubular member 2, a first fixed member 3 to which a supply flow path L1 having a supply port P1 is attached, a second fixed member 4 to which a discharge flow path L2 having a discharge port P2 is attached, a ring-shaped gear G1, a driving means 5 having a drive gear G2, a driven gear G3 and a motor M, and a support roller R.

[0026] The tubular member 2 is made of a stainless steel pipe that allows hot water to flow inside from one end 2a to the other end 2b, and in this embodiment, it is arranged so that it slopes downward at a predetermined angle (downward gradient) from one end 2a to the other end 2b. The hot water flowing inside the tubular member 2 is set to a temperature of about 80°C to 85°C, and the water level is adjusted so that the hot water flows at a level less than half the internal space.

[0027] In this embodiment, the stainless steel pipe has a diameter of approximately 70 mm and a length of approximately 20 m, but the material and dimensions can be changed as desired depending on the size of the greenhouse H and the temperature of the hot water to be circulated. The temperature of the hot water is not limited to approximately 80°C to 85°C, but can be adjusted as desired depending on the set temperature inside the greenhouse H, the temperature of the outside air, the performance of the hot water boiler 7, etc.

[0028] The first fixing member 3 is attached to one end 2a of the tubular member 2, and has a supply flow path L1 attached thereto, which has a supply port P1 that supplies hot water into the tubular member 2. By connecting the supply flow path L1, hot water heated in the hot water reservoir 8 of the hot water boiler 7 is supplied from the supply port P1 into the tubular member 2. The first fixing member 3 is fixed at a predetermined position within the greenhouse H, and is configured to support the one end 2a side of the tubular member 2.

[0029] The second fixing member 4 is attached to the other end 2b of the tubular member 2, and has a discharge flow path L2 attached thereto, which has a discharge outlet P2 that discharges the hot water that has flowed through the tubular member 2, and is configured so that by connecting the discharge flow path L2, the hot water that has flowed through the tubular member 2 is discharged from the discharge outlet P2 to the outside of the tubular member 2. The second fixing member 4 is fixed to a predetermined position within the greenhouse H, and supports the other end 2b side of the tubular member 2.

[0030] Here, the heating device 1 according to this embodiment is equipped with a driving means 5 that rotates the tubular member 2 about its axis (rotation about the axis line L), and is capable of heating the inside of the greenhouse H by rotating the tubular member 2 with the driving means 5 while circulating hot water inside the tubular member 2. That is, the driving means 5 according to this embodiment is configured to have a motor M, and is configured to rotate the tubular member 2 about its axis with the driving force of the motor M.

[0031] Specifically, as shown in Figures 2 and 3, a ring-shaped gear G1 is formed around the outer circumferential surface of the tubular member 2, and the driving means 5 has a driving gear G2 that rotates together with the output shaft Ma of the motor M, and a driven gear G3 that engages with the driving gear G2 and the ring-shaped gear G1. By driving the motor M to rotate the driving gear G2, the ring-shaped gear G1 is rotated via the driven gear G3, and the tubular member 2 is rotated around its axis.

[0032] The driven gear G3 according to this embodiment is interposed between the drive gear G2 and the ring-shaped gear G1, and is composed of two gear members that mesh with the drive gear G2 and the ring-shaped gear G1, respectively, and are rotatable about the rotation axis C1, with the drive gear G2 having a smaller diameter and fewer teeth than the ring-shaped gear G1. As a result, the ring-shaped gear G1, via the drive gear G2 and the driven gear G3, functions as a reducer, and is configured to be able to obtain a large rotational force with a small drive force.

[0033] On the other hand, the tubular member 2 according to this embodiment is rotatable about its axis by sliding (slipping) one end 2a and the other end 2b circumferentially relative to the first fixing member 3 and the second fixing member 4 which are fixedly installed in the greenhouse H, and as shown in Fig. 5, a sealing member S is interposed between the second fixing member 4 and the other end 2b of the tubular member 2. The sealing member S is made of a sealing material made of, for example, rubber or resin, and the sealing member S may be interposed between the first fixing member 3 and one end 2a of the tubular member 2 in addition to between the second fixing member 4 and the other end 2b of the tubular member 2.

[0034] The support rollers R rotatably support one end 2a side and the other end 2b side of the tubular member 2, and are made of roller-shaped members that can rotate around a rotation axis C2, as shown in Fig. 4. The support rollers R according to this embodiment are attached to one end 2a side and the other end 2b side of the tubular member 2, respectively, but the number of support rollers installed may be changed as desired depending on the length and diameter of the tubular member 2.

[0035] The heating device 1 according to this embodiment is equipped with a tubular member 2 through which hot water can flow from one end 2a to the other end 2b, and a drive means 5 that rotates the tubular member 2 about its axis, and is capable of heating the greenhouse H by rotating the tubular member 2 with the drive means 5 while hot water flows through the tubular member 2. Therefore, even if the flow rate of hot water is restricted, the temperature of the hot water can be transferred around the entire circumference of the tubular member 2, and the heat of the hot water can be transferred effectively to the surroundings. Therefore, the greenhouse H can be heated efficiently regardless of the flow rate of hot water.

[0036] Furthermore, according to this embodiment, the device is provided with a first fixed member 3 attached to one end 2a of the tubular member 2 and having a supply port P1 formed therein for supplying hot water into the tubular member 2, and a second fixed member 4 attached to the other end 2b of the tubular member 2 and having a discharge port P2 formed therein for discharging hot water that has circumferentially flowed through the tubular member 2, and the one end 2a and the other end 2b of the tubular member 2 are able to slide circumferentially relative to the first fixed member 3 and the second fixed member 4 which are installed in a fixed state and rotate around the axis, thereby enabling the supply of hot water from the supply port P1 and the discharge of hot water from the discharge port P2 to be carried out smoothly and reliably.

[0037] Furthermore, the tubular member 2 in this embodiment is arranged at a downward incline from one end 2a to the other end 2b, and a sealing member S is interposed between the second fixing member 4 and the other end 2b of the tubular member 2. Therefore, the inclination of the tubular member 2 allows hot water to flow smoothly without stagnation, and the sealing member S prevents hot water from leaking from between the second fixing member 4 and the other end 2b of the tubular member 2.

[0038] Furthermore, since the tubular member 2 according to this embodiment is made of a stainless steel pipe, hot water can be circulated through the stainless steel pipe, which has relatively high rigidity, thermal conductivity, and durability and is resistant to rust, thereby efficiently heating the greenhouse H. Note that the tubular member 2 may be a pipe made of another metal instead of a stainless steel pipe, and the cross section may be elliptical or rectangular rather than circular, as long as hot water can be circulated inside.

[0039] In addition, the driving means 5 according to this embodiment is configured to have a motor M, and rotates the tubular member 2 about its axis by the driving force of the motor M, so that it is possible to easily adjust the rotation speed of the tubular member 2 and to reliably rotate the tubular member 2. Note that instead of the motor M, other forms of driving means (other actuators) may be used.

[0040] In particular, according to this embodiment, a ring-shaped gear G1 is formed circumferentially on the outer circumferential surface of the tubular member 2, and the drive means 5 has a drive gear G2 that rotates together with the output shaft Ma of the motor M, and a driven gear G3 that engages with the drive gear G2 and the ring-shaped gear G1. By driving the motor M to rotate the drive gear G2, the ring-shaped gear G1 is rotated via the driven gear G3, and the tubular member 2 is rotated about its axis. Therefore, the ring-shaped gear G1 can be stably held by the two driven gears G3, and the motor M can be disposed at any position. Furthermore, by arbitrarily setting the size of each gear, the rotational speed and rotational torque of the tubular member 2 can be arbitrarily adjusted.

[0041] Furthermore, according to this embodiment, the support rollers R are provided to rotatably support the one end 2a and the other end 2b of the tubular member 2, so that the tubular member 2 can be well supported and prevented from bending in the radial direction. The support rollers R are preferably made of rubber or resin, but may be made of other materials as long as they can rotatably support the tubular member 2.

[0042] Although the present embodiment has been described above, the present invention is not limited to this, and for example, the driving means 5 may be arranged at one end 2a or the other end 2b of the tubular member 2 and driven to rotate, or a plurality of driving means 5 may be arranged for one tubular member 2 and driven to rotate in synchronization with one another. Although in this embodiment, the supply flow path L1 having a supply port P1 and the discharge flow path L2 having a discharge port P2 are attached to one end 2a of the tubular member 2, and the other end 2b of the tubular member 2, separate members having the supply port P1 and the discharge port P2 may be attached, respectively.

[0043] 6, the drive gear G2 may be meshed with the ring-shaped gear G1 to connect them without using the driven gear G3. Furthermore, as shown in Fig. 7, a pulley N may be attached to the output shaft Ma of the motor M, and the pulley N and the tubular member 2 may be connected by a transmission belt Q. In this way, the transmission mechanism for transmitting the driving force of the drive source such as the motor M to the tubular member 2 may be changed to any other mechanism.

[0044] 8, one end 2a of the tubular member 2 and the first fixing member 3 may be fixed together by welding or the like, and a seal member T may be interposed between the first fixing member 3 and the supply flow path L1. In this case, the tubular member 2 and the first fixing member 3 can be rotated together while the supply flow path L1 is fixed, eliminating sliding between the tubular member 2 and the first fixing member 3 and preventing leakage of hot water from that location. [Industrial Applicability]

[0045] The present invention can also be applied to devices with different external shapes or devices with additional functions, provided that they have the same gist as the present invention. [Explanation of symbols]

[0046] 1 Warming device 2 Tubular member 2a One end 2b Other end 3 First fixing member 4 Second fixing member 5. Driving means 6 Burner 7. Hot water boiler 8 Hot water reservoir P1 supply port P2 outlet R Support Roller S sealing material Medium motor Ma output shaft G1 ring gear G2 drive gear G3 driven gear W Hot water L axis P pump V On-off valve F Fan H Greenhouse L1~L5 flow path C1, C2 rotation axis N pulley Q Transmission belt E Smoke exhaust flow path

Claims

1. A heating device installed in a greenhouse on a farm to heat the surroundings, a tubular member through which hot water can flow from one end to the other end; a driving means for rotating the tubular member about its axis; and a heating device capable of heating the inside of a greenhouse by rotating the tubular member with the driving means while circulating hot water inside the tubular member.

2. a first fixing member attached to one end of the tubular member and having a supply port formed therein for supplying hot water into the tubular member; a second fixing member attached to the other end of the tubular member and having an outlet formed therein for discharging the hot water that has flowed through the tubular member; 2. The heating device according to claim 1, characterized in that the one end and the other end of the tubular member are slidable circumferentially relative to the first fixing member and the second fixing member, which are installed in a fixed state, and are rotatable about an axis.

3. The heating device according to claim 2, characterized in that the tubular member is arranged at a downward incline from the one end to the other end, and a sealing member is interposed between the second fixing member and the other end of the tubular member.

4. 2. The heating device according to claim 1, wherein the tubular member is made of a stainless steel pipe.

5. 2. The warming device according to claim 1, wherein the driving means includes a motor, and the tubular member is rotated about its axis by the driving force of the motor.

6. The heating device of claim 5, characterized in that a ring-shaped gear is formed around the outer circumferential surface of the tubular member, and the driving means has a drive gear that rotates together with the output shaft of the motor and a driven gear that engages with the drive gear and the ring-shaped gear, and by driving the motor to rotate the drive gear, the ring-shaped gear is rotated via the driven gear, and the tubular member is rotated around its axis.

7. 2. The warming device according to claim 1, further comprising support rollers for rotatably supporting the one end and the other end of the tubular member, respectively.

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