JP7574991B1 - Floor heating system - Google Patents

Abstract

[Problem] To provide a floor heating system that can perform floor heating efficiently with a simple structure. [Solution] This floor heating system includes a pellet stove 3 having a hot air chamber at the bottom for storing hot air, underfloor spaces 13, 14 into which hot air from the hot air chamber is sent through a hot air duct 4 and heat-stored, and a hot air blowing member 5 capable of blowing the hot air from the underfloor spaces 13, 14 into rooms 91, 95. The pellet stove 3 is provided with a hot air volume regulator 35 capable of adjusting the ratio between the volume of the first hot air sent out in front of the pellet stove 3 and the volume of the second hot air sent out into the underfloor spaces 13, 14. The hot air duct 4 is provided vertically penetrating the bottom plate of the hot air chamber and the floor 92 of the room 91, and heat insulating materials 20, 21 are provided inside the base plate 10 and rising parts 11, 12 of the foundation 1 of the underfloor spaces 13, 14. [Selected Figure] Fig. 2

Description

The present invention relates to a floor heating system using a pellet stove.

A floor heating system using a pellet stove uses a pellet stove that uses wood pellets, a renewable energy source, as fuel, so it is in line with the SDGs (Sustainable Development Goals) and can contribute to the realization of a sustainable society. A floor heating system using a pellet stove is known from the prior art, which is described in Patent Document 1. This floor heating system includes a pellet stove (13) installed indoors (12), exhaust pipes (14a, 14b) that introduce the exhaust heat of the pellet stove (13) into the underfloor (19) and then discharge it to the outdoors, a heat dissipation box (15) installed in the exhaust pipe (14a, 14b) that dissipates the exhaust heat to the underfloor (19), and a concrete slab (16) that stores the thermal energy dissipated from the heat dissipation box (15). With this floor heating system, it is considered that the exhaust heat of the pellet stove (13) that was discharged to the outdoors can be effectively used as a heat source for underfloor heating.

However, in the above floor heating system, the amount of heat exhausted from the exhaust pipes (14a, 14b) alone is insufficient to heat the floor of a room (12) with a certain amount of floor space. In addition, the exhaust pipes (14a, 14b) must be installed under the floor, which not only complicates the structure but also poses problems in terms of safety and maintenance.

In response to this, a floor heating system has been proposed as described in Patent Document 2. This floor heating system includes an openable/closable partition material (31) arranged in the living room (19), a heater (33) arranged in a partitioned space (32) surrounded by the outer wall W of the living room (19) and the partition material (31), and an openable/closable member (36) that is openably provided on the floor (34) of the partitioned space (32) and sends warm air from the partitioned space (32) to the underfloor space (35) when the partition material (31) is open. According to this floor heating system, when the partition material (31) is open, the living room (19) is heated by the warm air from the heater (33). When the partition material (31) is closed, the partitioned space (32) is preferentially heated by the warm air. When the partition material (31) is closed and the opening/closing member (36) is open, the warm air in the partition space (32) is sent to the underfloor space (35) via the opening/closing member (36). As a result, the underfloor space (35) is heated by the warm air, and the living room (19) can be heated. This makes it possible to supply most of the heat that can be recovered from the heater (33) to the underfloor space (35) with a simpler configuration than the floor heating system described in Patent Document 1, and it is believed that it is possible to heat all the rooms on the same floor, including the living room (19).

JP 2009-250544 A JP 2019-2631 A

However, in the floor heating system described in Patent Document 2, the partition space (32) is long and large in the vertical direction, so the warm air from the heater (33) accumulates near the ceiling (40). As a result, there is a risk that there will not be enough warm air near the floor (34) where the opening and closing member (36) is located, and sufficient warm air will not be supplied to the underfloor space (35). In addition, it is necessary to create a partition space (32) etc. in the living room (19), which is not necessarily a simple configuration, and the appearance is not very good.

The present invention was made in consideration of these conventional problems, and provides a floor heating system that is simple in configuration and can provide efficient floor heating.

In order to solve the above problems, the floor heating system according to claim 1 is characterized in that, in a floor heating system that uses a pellet stove to heat a room, the system comprises a pellet stove having a hot air chamber at a lower part for storing hot air, an underfloor space into which the hot air from the hot air chamber is sent through a hot air duct and heat-stored, and a hot air blowing member provided between the underfloor space and the room and capable of blowing the hot air from the underfloor space into the room, the pellet stove is provided with a hot air volume regulator capable of adjusting the ratio between the volume of first hot air sent forward of the pellet stove and the volume of second hot air sent into the underfloor space, the hot air duct is provided vertically penetrating the bottom plate of the hot air chamber and the floor of the room, and a heat insulating material is provided inside the base plate and rising portion of the foundation of the underfloor space ,
The hot air volume regulator is provided in the hot air duct and directly regulates the volume of the second hot air to regulate the ratio between the volume of the first hot air and the volume of the second hot air;
The hot air duct comprises a first duct arranged in the underfloor space and a second duct arranged in the hot air room, an upper end of the first duct is inserted into a duct hole penetrating the floor of the room and is attached so as to protrude from the floor by a predetermined length, and the second duct is detachably attached to the upper end of the first duct,
The hot air volume regulator has an adjustment plate fixed to one end which rotates within the hot air duct to change the cross-sectional area of the hot air duct and directly adjusts the volume of the second hot air, and an adjustment rod whose other end protrudes from the pellet stove, the second duct has an outer diameter slightly smaller than the inner diameter of the first duct, and a pair of first notches are formed on the same diameter of the first duct at the upper end of the first duct, into which the adjustment rod is rotatably inserted, and a pair of second notches are formed at the lower end of the second duct at positions corresponding to the first notches, and by inserting the second duct into the first duct and inserting the adjustment rod into the first and second notches of the first and second ducts, the adjustment rod is rotatably attached and the second duct abuts against the adjustment rod.

The floor heating system according to claim 2 is characterized in that, in claim 1, the other end of the adjustment rod is provided with a support plate fixed to the floor of the room to rotatably support the adjustment rod, and a rotating plate that can rotatably and non-rotatably fix the adjustment rod, and the other end of the adjustment rod is provided with a screw hole in the longitudinal direction, the support plate is L-shaped, and a surface perpendicular to the floor has a first round hole that rotatably supports the adjustment rod and a female screw hole for fixing the rotating plate, and the rotating plate has a screw hole that can rotate the adjustment rod and the rotating plate. a second round hole through which a fixing screw for fixing the adjusting rod is inserted, and an adjustment hole which is a long hole concentric with the second round hole are provided; the other end of the adjustment rod is inserted into the first round hole and the fixing screw is inserted into the second round hole and screwed into the screw hole to fix the rotating plate and the adjustment rod; the rotating plate is rotated around the center of the second round hole to adjust the adjustment rod, and then a butterfly screw is inserted into the adjustment hole and screwed into the female threaded hole to abut and fix the rotating plate and support plate, thereby fixing the adjustment rod so that it cannot rotate.
The feature of the floor heating system according to claim 3 is that in claim 2 , no vent hole for passing outside air is provided in the rising portion, and a heat insulating material is applied to the outside of the rising portion.

The feature of the floor heating system of claim 4 is that, in claim 2 , a blower is installed in the underfloor space to diffuse the warm air sent out from the warm air duct into the underfloor space, and the warm air blowing member is an underfloor ventilation fan.

The feature of the floor heating system of claim 5 is that, in any one of claims 1 to 4 , a long hole is provided in the bottom plate of the hot air chamber of the pellet stove through which the hot air duct passes, and the pellet stove can be moved and adjusted to be installed parallel to the wall of the room.

The floor heating system according to claim 1 includes a pellet stove having a hot air chamber at the bottom for storing hot air, an underfloor space into which the hot air from the hot air chamber is sent through a hot air duct and heat-stored, and a hot air blowing member capable of blowing the hot air from the underfloor space into the room. The pellet stove is provided with a hot air volume regulator capable of adjusting the ratio between the volume of the first hot air sent out in front of the pellet stove and the volume of the second hot air sent into the underfloor space. The hot air duct is provided vertically penetrating the bottom plate of the hot air chamber and the floor of the room, and a heat insulating material is provided in the base plate and rising part of the foundation of the underfloor space. As described above, this floor heating system is composed of a pellet stove, an underfloor space, a hot air blowing member, and a hot air duct, and therefore does not require special parts or piping, and has a very simple configuration.

In addition, insulation is provided on the inside of the base plate and the rising part of the foundation, so that the so-called foundation internal insulation is adopted, and all except the ceiling surface of the underfloor space is covered with insulation, forming a highly airtight and highly insulated space. This makes it possible to realize an underfloor space where stored heat is unlikely to escape to the outside. In addition, since the hot air chamber is a small space provided under the pellet stove, the temperature of the hot air in the hot air chamber is high overall. Furthermore, since the hot air duct is provided vertically penetrating the bottom plate of the hot air chamber and the floor of the room, hot air can be sent from the hot air chamber to the underfloor space in the shortest distance, and heat is unlikely to escape from the hot air being sent to the outside. And, since the hot air blowing member can blow the hot air in the underfloor space into the room, the flow of hot air from the underfloor space to the room can be made smooth. In addition, the hot air volume regulator can adjust the ratio between the volume of the first hot air sent out in front of the pellet stove and the volume of the second hot air sent into the space under the floor, so the room temperature can be kept at an optimum level. Therefore, this floor heating system can provide efficient floor heating with a simple configuration.

In addition, since the hot air duct is installed vertically penetrating the bottom plate of the hot air room and the floor of the room, the hot air duct cannot be seen from the outside, and since there are no large parts or devices other than the pellet stove in the room, the appearance is not marred. Furthermore, since the hot air duct does not protrude from the back of the pellet stove, the pellet stove can be placed close to the wall, making effective use of space.
In addition, the volume of the second warm air is directly adjusted by a warm air volume regulator provided in the warm air duct to adjust the ratio between the volume of the first warm air and the volume of the second warm air. Directly adjusting the volume of the second warm air by the warm air volume regulator in this way means that the volume of the second warm air is adjusted with priority over the volume of the first warm air, making it easier to adjust the temperature of the entire house.
Furthermore, the hot air duct is composed of a first duct arranged in the space under the floor and a second duct arranged in the hot air room. The upper end of the first duct is inserted into a duct hole penetrating the floor of the room and is attached so as to protrude a predetermined length from the floor. The second duct is detachably attached to the upper end of the first duct. In this specification, the "predetermined length" refers to a length shorter than the length from the floor to the bottom of the pellet stove. If the second duct is removed from the first duct, the upper end of the first duct will not come into contact with the bottom of the pellet stove, so that the pellet stove can be moved horizontally during maintenance, which is very convenient.

In the floor heating system according to claim 3 , not only is there no vent hole for passing outside air in the rising part, but also a so-called foundation external insulation is adopted, which installs insulation material on the outside of the rising part. Therefore, it is possible to prevent the foundation concrete from being cooled by the cold air outside. This makes it possible to achieve even higher airtightness and insulation.

In the floor heating system according to claim 4 , the hot air sent out from the hot air duct is diffused into the underfloor space by the blower installed in the underfloor space. The hot air is then forcibly sent into the room by the underfloor ventilation fan as a hot air blowing member, which makes it possible to smooth the flow of hot air from the underfloor space to the room. In addition, the blower sends out more hot air from the hot air duct, which makes it possible to smooth the flow of hot air from the hot air room to the underfloor space.

In the floor heating system according to claim 5 , a long hole through which the hot air duct passes is provided in the bottom plate of the hot air chamber of the pellet stove. This long hole allows the pellet stove to be moved and adjusted parallel to the wall of the room.

1 is a plan view of the first floor of a house equipped with a floor heating system according to an embodiment. FIG. 2 is a cross-sectional view taken along line II in FIG. 1 , showing a house equipped with the floor heating system according to the embodiment. FIG. 3 is a cross-sectional view taken along line III in FIG. 1 , showing a house equipped with the floor heating system according to the embodiment. FIG. 4 is a partially enlarged cross-sectional view of FIG. 3 in a house equipped with the floor heating system of the embodiment. FIG. 2 is a plan view of a hot air room, a duct fixing member, and a hot air volume regulator in a house equipped with the floor heating system of the embodiment. FIG. 2 is a plan view showing a method of installing a pellet stove in a house equipped with the floor heating system of the embodiment. FIG. 2 is a plan view showing a method of installing a pellet stove in a house equipped with the floor heating system of the embodiment. FIG. 2 is an enlarged cross-sectional view of a hot air duct in a house equipped with the floor heating system of the embodiment. FIG. 2 is a plan view showing a method of installing a pellet stove in a house equipped with the floor heating system of the embodiment. 1A and 1B are an exploded perspective view and an assembly view of a hot air volume regulator in a house equipped with the floor heating system of the embodiment.

An embodiment of the floor heating system according to the present invention implemented in a house will be described below with reference to the drawings. Fig. 1 is a plan view of the first floor of a house equipped with this floor heating system, and Figs. 2 and 3 are cross-sectional views taken along the lines II and III in Fig. 1. However, for ease of explanation, the number of rooms, layout, and equipment have been simplified in the house shown in Figs. 1 to 3. As shown in Figs. 1 to 3, the house is surrounded by an exterior wall 90, and rooms 91 and 95 are provided on the first floor. In addition, rooms 98 and 99 are provided on the second floor, separated by ceilings 93 and 97.

As shown in FIG. 1, the room 91 has windows 91a and 91b, and a pellet stove 3 is installed on the floor 92. The room 95 has a window 95a and a front door 95b. However, the equipment and furnishings arranged on the floor 96 of the room 95 are omitted. And, between the floors 92 and 96 and the underfloor spaces 13 and 14 (see FIG. 2) described later, and under the windows 91a, 91b, and 95a, an underfloor ventilator 5 is provided as a hot air blowing member that can blow the hot air of the underfloor spaces 13 and 14 to the rooms 91 and 95. In this way, by providing the underfloor ventilator 5 under the windows 91a, 91b, and 95a, it is possible to prevent condensation on the windows 91a, 91b, and 95a. The number of underfloor ventilators 5 may be increased or decreased as necessary. Furthermore, in addition to the underfloor ventilator 5, a louver, a grille, or the like may be provided as appropriate.

As shown in Figures 2 and 3, the foundation 1 of this house is a slab foundation, and has a base plate 10 that is poured horizontally, and rising portions 11, 12 that are poured vertically upward from the base plate 10. The space formed by the foundation 1 and floors 92, 96 is the underfloor space 13, 14. Hot air from a pellet stove 3 is sent through a hot air duct 4 into these underfloor spaces 13, 14, where heat is stored. Insulation material 20 is provided on the base plate 10 of the foundation 1, and insulation material 21 is provided on the inside of the rising portion 11 and on both sides of the rising portion 12, providing insulation within the foundation. This insulation within the foundation allows the formation of highly airtight, highly insulated underfloor spaces 13, 14, making it difficult for stored heat to escape to the outside.

In addition, since the rising portion 11 does not have a vent hole for passing outside air, it is possible to reliably block the flow of air between the outdoors and the underfloor spaces 13, 14. Furthermore, since the outside of the rising portion 11 is provided with insulation material 22 and foundation external insulation is installed, it is possible to prevent the rising portion 11 from being cooled by the cold air outdoors. If the foundation external insulation is not installed, the concrete of the rising portion 11 will be cooled by the cold air outdoors, and the effect of the foundation internal insulation will be reduced. In this embodiment, since the foundation internal insulation and foundation external insulation are installed, the underfloor spaces 13, 14 can be made into highly airtight and highly insulated spaces, and can be made into spaces equivalent to the rooms 91, 95.

This embodiment is an example of a new build, and 40 mm phenol foam is used as the insulation 20, 22, and 100 mm of urethane is injected as the insulation 21. In the case of renovation, the foundation is treated so that it is equivalent to the new build shown in this embodiment. For example, if the foundation is a slab footing, the vents on the rise facing the outdoors are completely blocked, and the base is treated before the insulation is applied. The base can be treated by pouring a concrete slab, or by laying crushed stone, compacting it, and then laying an airtight sheet.

A pellet stove 3 is installed on the floor 92 of the room 91 near the exterior wall 90. A portion of the hot air from the pellet stove 3 is sent out in front of the pellet stove 3 as shown by arrow A (see Figure 3) to directly heat the room 91. A portion of the hot air from the pellet stove 3 is also sent through the hot air duct 4 to the underfloor spaces 13 and 14 as shown by arrows B and G (see Figure 2) to store heat. The hot air sent out from the hot air duct 4 is then diffused into the underfloor spaces 13 and 14 by the blower 15.

For convenience of explanation, only the room 91 will be described below. The underfloor ventilation fan 5 installed between the underfloor space 13 and the room 91 forcibly sends the hot air from the underfloor space 13 to the room 91 as shown by arrows C and D (see Figures 2 and 3). The hot air then moves as shown by arrows E and F (see Figures 2 and 3). In this way, the flow of hot air from the underfloor space 13 to the room 91 can be made smooth. In addition, since the blower 15 generates an air flow near the outlet of the hot air duct 4, more hot air is sent out from the hot air duct 4, and the flow of hot air from the pellet stove 3 to the underfloor space 13 can be made smooth. Therefore, convection between the underfloor space 13 and the room 91 can be made smooth.

In this entire house, as shown by the dashed arrows, heat is transferred through the floors 92, 96 and the ceilings 93, 97, and rooms 91, 95, 98, 99 can be heated from the feet up. In this way, this floor heating system can efficiently heat the entire house. Therefore, heat shock in toilets, washrooms, etc. can be prevented. The hot air sent from the pellet stove 3 is the air in the room 91 that has been warmed by the pellet stove 3, and is safe because it is not mixed with exhaust gas. Furthermore, this floor heating system is composed of the pellet stove 3, underfloor spaces 13, 14, underfloor ventilation fan 5, hot air duct 4, and blower 15, and does not require special parts or piping, and has a very simple configuration. In addition, the pellet stove 3 is provided with a hot air volume regulator 35 that can adjust the ratio between the volume of the first hot air WA1 sent out in front of the pellet stove 3 and the volume of the second hot air WA2 sent out to the underfloor spaces 13, 14, as shown in FIG. 4.

As shown in FIG. 4, the pellet stove 3 has an approximately rectangular parallelepiped outer shape, and is installed so that the back surface 3b is parallel to the wall surface 90a of the outer wall 90. A combustion chamber 30 is formed at the top of the front surface 3a, and a hot air chamber 31 is provided below the combustion chamber 30. This hot air chamber 31 is a small space, and the temperature of the hot air in the hot air chamber 31 tends to be high overall. In addition, an intake and exhaust pipe 39 is attached through the outer wall 90 from the back surface 3b of the pellet stove 3, which supplies outside air for burning the pellets that are fuel in the combustion chamber 30 and exhausts the combustion gas generated in the combustion chamber 30 to the outdoors. In this pellet stove 3, the air introduced from the room 91 is sent upward as shown by the dashed arrow, and is heated by heat exchange with the high-temperature combustion gas generated in the combustion chamber 30, becoming hot air. This hot air is then separated at the top of the combustion chamber 30 into a first hot air WA1 that is sent out in front of the pellet stove 3, and a hot air WA0 that passes through the back of the combustion chamber 30 and is sent into the hot air chamber 31. This hot air WA0 is stored in the hot air chamber 31. The stored hot air is then sent out as a second hot air WA2 through the hot air duct 4 into the underfloor spaces 13 and 14.

The hot air duct 4 is arranged vertically penetrating the duct hole 92a provided through the bottom plate 32 and floor 92 of the hot air chamber 31, and is composed of a first duct 40 arranged in the underfloor space 13, 14 and a second duct 41 arranged in the hot air chamber 31. In this way, the hot air duct 4 is arranged vertically penetrating the bottom plate 32 and floor 92 of the hot air chamber 31, so that hot air can be sent from the hot air chamber 31 to the underfloor space 13 in the shortest distance. The first duct 40 is attached so that its upper end does not come into contact with the bottom surface of the pellet stove 3 (the bottom plate 32 of the hot air chamber 31). The second duct 41 is attached detachably to the upper end of the first duct 40. If this second duct 41 is removed from the first duct 40, the first duct 40 will not come into contact with the bottom surface of the pellet stove 3 (the bottom plate 32 of the hot air chamber 31), so the pellet stove 3 can be moved horizontally for maintenance, etc., which is very convenient.

Also, between the first duct 40 and the second duct 41, a hot air volume regulator 35 is provided that can adjust the ratio between the volume of the first hot air WA1 and the volume of the second hot air WA2. This hot air volume regulator 35 can adjust the ratio between the volume of the first hot air WA1 and the volume of the second hot air WA2 by directly adjusting the volume of the second hot air WA2. That is, if the hot air volume regulator 35 is opened widely, the volume of the second hot air WA2 increases, and the volume of the hot air WA0 sent to the hot air chamber 31 increases, and the volume of the first hot air WA1 decreases relatively. Conversely, if the hot air volume regulator 35 is opened narrowly, the volume of the second hot air WA2 decreases, and the volume of the hot air WA0 sent to the hot air chamber 31 decreases, and the volume of the first hot air WA1 increases relatively. This hot air volume regulator 35 allows the ratio between the volume of the first hot air WA1 and the volume of the second hot air WA2 to be adjusted, so that the temperatures of the rooms 91, 95, 98, and 99 can be kept at an optimum level.

Here, the entire house can be heated more efficiently by heating rooms 91, 95, 98, and 99 from the feet up through floors 92, 96, and ceilings 93 and 97 from underfloor space 13 than by heating room 91 with hot air blown directly from the front of pellet stove 3. Therefore, directly adjusting the volume of second hot air WA2 with hot air volume regulator 35 means that the volume of second hot air WA2 is adjusted with priority over the volume of first hot air WA1, making it easier to adjust the temperature of the entire house.

Next, the installation method of the pellet stove 3 will be described in detail with reference to Figs. 5 to 10. Fig. 5 is a plan view of the hot air chamber 31, the duct fixing members 33 and 34 used in the installation of the pellet stove 3, and the hot air volume regulator 35, and Figs. 6, 7, and 9 are plan views showing the installation method of the pellet stove 3. Fig. 8 is an enlarged cross-sectional view of the hot air duct 4, and Fig. 10 is an exploded perspective view and assembly view of the hot air volume regulator 35. As shown in Fig. 5, the bottom plate 32 of the hot air chamber 31 of the pellet stove 3 is provided with a long hole 32a through which the second duct 41 passes, and screw holes 32b with female threads are opened at the four outer corners of the long hole 32a. The long diameter of the long hole 32a is parallel to the front surface 3a and back surface 3b of the pellet stove 3. This allows the pellet stove 3 to be moved in a direction parallel to the front surface 3a and back surface 3b relative to the second duct 41.

The duct fixing members 33, 34 position and fix the pellet stove 3 relative to the second duct 41, and consist of a positioning plate 33 and a pressing plate 34. The positioning plate 33 is roughly rectangular, with a round hole 33a in the center through which the second duct 41 passes, and notches 33b at the four corners. The notches 33b allow the positioning plate 33 to move in a direction parallel to the front surface 3a and back surface 3b. The pressing plate 34 is rectangular, with a square hole 34a in the center, and screw holes 34b at the four corners. The pellet stove 3 can be fixed to the second duct 41 by placing the pressing plate 34 on the positioning plate 33, aligning the screw holes 32b and 34b, and fastening them with screws.

The hot air volume regulator 35 is made up of an adjustment rod 36, a support plate 37, and a rotating plate 38. The adjustment rod 36 is rod-shaped with a circular cross section, and an adjustment plate 36a is fixed to one end 36c, which can be rotated to rotate the adjustment plate 36a. The adjustment plate 36a is disk-shaped, and can be rotated to change the cross-sectional area of the second duct 41, thereby directly adjusting the volume of the second hot air WA2. The support plate 37 and rotating plate 38 will be described later.

To install the pellet stove 3 using the duct fixing members 33 and 34 configured as above, first, as shown in FIG. 6, place the pellet stove 3 on the floor 92 of the room 91 so that the first duct 40 can be seen from the long hole 32a, and then connect the supply and exhaust pipe 39. At this time, as shown by the arrow, the pellet stove 3 can be moved parallel to the wall surface 90a within the range where the first duct 40 can be seen from the long hole 32a to adjust the installation location. Next, the adjustment rod 36 with the adjustment plate 36a fixed to one end 36c side is arranged between the bottom plate 32 and the floor 92 parallel to the front surface 3a of the pellet stove 3 and with the other end 36d protruding from the pellet stove 3. However, the adjustment plate 36a is attached rotatably inside the second duct 41. The specific installation method of the adjustment plate 36a will be described later.

Then, as shown in FIG. 7, the second duct 41 is attached to the upper end of the first duct 40. The specific method of attaching this second duct 41 will also be described later. Furthermore, with the second duct 41 passing through the round hole 33a, the positioning plate 33 is adjusted so that the screw hole 32b is visible through the notch 33b, and the positioning plate 33 is pressed against the bottom plate 32.

8 shows an enlarged cross-sectional view of the upper end of the first duct 40 and the second duct 41. As shown in FIG. 8, the upper end of the first duct 40 is a cylindrical metal first duct body 40a with a heat insulating material 40b wound around the outer periphery. The upper end of the first duct 40 has two notches 40c on the same diameter. The adjustment rod 36 is rotatably inserted into the notches 40c. The second duct 41 is made of metal and has a cylindrical shape, and two notches 41c are formed at the lower end at positions corresponding to the notches 40c of the first duct 40. The outer diameter of the second duct 41 is slightly smaller than the inner diameter of the first duct 40. Therefore, if the second duct 41 is inserted into the first duct 40 and the adjustment rod 36 is rotatably inserted into the notches 41c, the second duct 41 is attached to the first duct 40. As a result, by rotating the adjustment rod 36, the adjustment plate 36a rotates within the second duct 41.

Then, as shown in FIG. 9, the pressing plate 34 is placed on the positioning plate 33 so that the screw holes 32b and 34b are aligned. Then, the pressing plate 34 is attached by tightening the screw holes 32b and 34b with screws. As a result, the positioning plate 33 is pressed against the pressing plate 34, the second duct 41 and the pellet stove 3 are fixed, and the pellet stove 3 is installed. In this way, since the hot air duct 4 is installed vertically penetrating the bottom plate 32 and the floor 92 of the hot air room 31, the hot air duct 4 cannot be seen from the outside, and there are no special parts or devices other than the pellet stove 3 in the room, so the appearance is not impaired. Furthermore, since the hot air duct 4 does not protrude from the back surface 3b of the pellet stove 3, the pellet stove 3 can be brought closer to the wall surface 90a, and the space can be used effectively.

Next, the assembly and adjustment of the hot air volume regulator 35 will be described with reference to FIG. 10. FIG. 10 (1) is an exploded perspective view of the other end 36d of the adjustment rod 36. As shown in FIG. 10 (1), the other end 36d of the adjustment rod 36 has a screw hole 36b in the longitudinal direction. A fixing screw 38c is screwed into this screw hole 36b, so that the rotating plate 38 can be fixed to the adjustment rod 36. The support plate 37 is L-shaped and has a round hole 37a and a female threaded hole 37b. The round hole 37a is a through hole with a diameter slightly larger than the diameter of the adjustment rod 36, and supports the adjustment rod 36 so that it can rotate. The female threaded hole 37b is a through hole provided with a female thread, and a butterfly screw 38d is screwed into the through hole to fix the rotating plate 38 to the support plate 37. The rotating plate 38 is approximately L-shaped and has a round hole 38a and an adjustment hole 38b. The round hole 38a is a through hole through which the fixing screw 38c passes, and the fixing screw 38c can be used to fix the rotating plate 38 to the adjustment rod 36. The adjustment hole 38b is a long hole concentric with the round hole 38a, and after the rotating plate 38 has been rotated to a specified angle, the rotating plate 38 can be fixed to the support plate 37 by the thumbscrew 38d.

To assemble this hot air volume regulator 35, first, as shown in FIG. 10 (2), the other end 36d of the adjustment rod 36 is passed through the round hole 37a of the support plate 37. Then, the round hole 38a of the rotating plate 38 is aligned with the screw hole 36b of the adjustment rod 36, and the rotating plate 38 is fixed to the adjustment rod 36 with the fixing screw 38c. In this way, when the rotating plate 38 is rotated, the adjustment rod 36 rotates, and the adjustment plate 36a can be rotated.

Then, as shown in FIG. 10 (3), the support plate 37 is moved to abut against the rotating plate 38, and the support plate 37 is fixed to the rotating plate 38 with the thumbscrew 38d. The support plate 37 is then fixed to the floor 92 with a screw (not shown). This assembles the hot air volume regulator 35 and fixes it to the floor 92. Note that to adjust the volume of the second hot air WA2, first loosen the thumbscrew 38d and rotate the rotating plate 38 to rotate the adjustment plate 36a to a specified angle. Then, tighten the thumbscrew 38d again to fix the rotating plate 38 to the support plate 37.

Next, we will briefly explain the operation of the entire floor heating system equipped with the pellet stove 3 installed as described above. In this floor heating system, when the power switch button of the pellet stove 3 is pressed, wood pellets as fuel are burned in the combustion chamber 30 of the pellet stove 3. The air introduced from the room 91 is heated by heat exchange with the combustion gas generated by the combustion of this pellet fuel and becomes hot air. Then, at the top of the combustion chamber 30, this hot air is divided into the first hot air WA1 that is sent to the front of the pellet stove 3 and the hot air WA0 that is sent through the back of the combustion chamber 30 to the hot air chamber 31. This hot air WA0 is stored in the hot air chamber 31. Then, the stored hot air is sent as the second hot air WA2 through the hot air duct 4 to the underfloor space 13, 14. Here, the air volume of the second hot air WA2 is directly adjusted by the hot air volume regulator 35, and as a result, the air volume of the first hot air WA1 is determined.

The first warm air WA1 is sent out in front of the pellet stove 3 to directly heat the room 91. The second warm air WA2 is diffused by the blower 15 into the underfloor spaces 13, 14 and heat is stored there. The warm air in the underfloor spaces 13, 14 is then forcibly sent into the rooms 91, 95 by the underfloor ventilation fan 5. The heat stored in the underfloor spaces 13, 14 is then transferred through the floors 92, 96, warming the rooms 91, 95 from the feet up. The heat from the heated rooms 91, 95 is then transferred through the ceilings 93, 97, warming the rooms 98, 99 from the feet up. In this way, this floor heating system can efficiently heat the entire house.

In the embodiment, the floor heating system includes a pellet stove 3 having a hot air chamber 31 at the bottom for storing hot air, underfloor spaces 13, 14 into which the hot air from the hot air chamber 31 is sent through a hot air duct 4 and heat-stored, and an underfloor ventilator 5 capable of blowing the hot air from the underfloor spaces 13, 14 into rooms 91, 95. The pellet stove 3 is provided with a hot air volume regulator 35 capable of adjusting the ratio between the volume of the first hot air WA1 sent out in front of the pellet stove 3 and the volume of the second hot air WA2 sent out into the underfloor spaces 13, 14. The hot air duct 4 is provided vertically penetrating the bottom plate 32 of the hot air chamber 31 and the floor 92 of the room 91, and the base plate portion 10 and rising portions 11, 12 of the foundation 1 of the underfloor spaces 13, 14 are provided with heat insulating materials 20, 21, 22. As such, this floor heating system is made up of a pellet stove 3, underfloor spaces 13 and 14, an underfloor ventilator 5, and a hot air duct 4, so it does not require any special parts or piping and has a very simple structure.

In addition, since the base plate part 10 and the rising parts 11, 12 of the foundation 1 are provided with insulation materials 20, 21 inside, the entire space under the floor 13, 14 is covered with insulation materials 20, 21 except for the ceiling surface, and a highly airtight and highly insulated space can be formed. This makes it possible to realize the underfloor space 13, 14 in which the stored heat is unlikely to escape to the outside. In addition, since the hot air chamber 31 is a small space provided under the pellet stove 3, the temperature of the hot air in the hot air chamber 31 becomes high overall. Furthermore, since the hot air duct 4 is provided vertically penetrating the bottom plate 32 of the hot air chamber 31 and the floor 92 of the room 91, hot air can be sent from the hot air chamber 31 to the underfloor space 13, 14 in the shortest distance, and heat from the hot air being sent is unlikely to escape to the outside. The underfloor ventilation fan 5 can blow the hot air from the underfloor spaces 13, 14 into the rooms 92, 96, which allows the hot air to flow smoothly from the underfloor spaces 13, 14 to the rooms 92, 96. The hot air volume regulator 35 can adjust the ratio between the volume of the first hot air WA1 sent out in front of the pellet stove 3 and the volume of the second hot air WA2 sent into the underfloor spaces 13, 14, which allows the temperature of the rooms 91, 95 to be kept at an optimum level. This floor heating system therefore provides efficient floor heating with a simple configuration.

Furthermore, this floor heating system not only does not have any vents in the rising section 11 to let outside air in, but also uses foundation external insulation, where insulation material 22 is installed on the outside of the rising section 11. This prevents the foundation concrete from being cooled by the cold air outside. This makes it possible to achieve even higher airtightness and insulation.

In addition, in this underfloor heating system, the hot air sent out from the hot air duct 4 is diffused into the underfloor spaces 13, 14 by the blower 15 installed in the underfloor spaces 13, 14. Then, the underfloor ventilation fan 5 forcibly sends this hot air into the rooms 91, 95, which makes it possible to smoothly flow hot air from the underfloor spaces 13, 14 to the rooms 91, 95. In addition, the blower 15 sends out more hot air from the hot air duct 4, which makes it possible to smoothly flow hot air from the hot air room 31 to the underfloor spaces 13, 14.

Furthermore, in this floor heating system, the second warm air WA2 is adjusted by the warm air volume regulator 35 to adjust the ratio between the volume of the first warm air WA1 and the volume of the second warm air WA2. In this way, directly adjusting the volume of the second warm air WA2 by the warm air volume regulator 35 means that the volume of the second warm air WA2 is adjusted with priority over the volume of the first warm air WA1, making it easier to adjust the temperature of the entire house.

In addition, with this floor heating system, if the second duct 41 is removed from the first duct 40, the upper end of the first duct 40 does not come into contact with the bottom surface of the pellet stove 3, which is very convenient as the pellet stove 3 can be moved horizontally for maintenance, etc.

Furthermore, in this floor heating system, the bottom plate 32 of the hot air chamber 31 of the pellet stove 3 is provided with a long hole 32a through which the second duct 41 passes. This long hole 32a allows the pellet stove 3 to be moved and adjusted parallel to the wall surface 90a for installation.

The above describes a home that employs the floor heating system of the present invention based on an embodiment, but the present invention is not limited to these, and it goes without saying that appropriate modifications can be made and applied as long as they do not contradict the technical concept of the present invention.

1...foundation, 3...pellet stove, 4...hot air duct (40...first duct, 41...second duct), 5...hot air blowing member (underfloor ventilation fan), 10...base plate, 11, 12...rising portion, 13, 14...underfloor space, 15...blower, 20, 21, 22...insulating material, 31...hot air chamber, 32...base plate, 32a...long hole, 35...hot air volume regulator, 90a...wall, 91, 95, 98, 99...room, 92, 96...floor, 92a...duct hole, WA1...first hot air, WA2...second hot air.

Claims (5)

In a floor heating system that uses a pellet stove to heat a room,
The pellet stove has a hot air chamber at the bottom for storing hot air;
an underfloor space into which the hot air from the hot air room is sent through a hot air duct and heat-stored;
a hot air blowing member provided between the underfloor space and the room and capable of blowing hot air from the underfloor space into the room;
The pellet stove has a first hot air volume sent to the front of the pellet stove,
a hot air volume regulator capable of adjusting a ratio of the volume of the hot air to the volume of the second hot air sent out to the underfloor space is provided;
The hot air duct is provided vertically penetrating the bottom plate of the hot air room and the floor of the room,
A heat insulating material is provided on the inside of the bottom plate and the rising part of the foundation of the underfloor space,
The hot air volume regulator is provided in the hot air duct and directly regulates the volume of the second hot air to regulate the ratio between the volume of the first hot air and the volume of the second hot air;
The hot air duct includes a first duct disposed in the underfloor space and a second duct disposed in the hot air room,
The upper end of the first duct is inserted into a duct hole penetrating the floor of the room and is attached so as to protrude from the floor by a predetermined length,
The second duct is detachably attached to an upper end of the first duct,
The hot air volume regulator has an adjustment plate fixed to one end thereof, which rotates in the hot air duct to change the cross-sectional area of the hot air duct and directly adjusts the volume of the second hot air, and an adjustment rod having the other end protruding from the pellet stove;
the second duct has an outer diameter slightly smaller than the inner diameter of the first duct;
A pair of first notches into which the adjustment rod is rotatably inserted is formed on the same diameter of the first duct at an upper end of the first duct,
A pair of second notches are formed at a lower end of the second duct at positions corresponding to the first notches,
A floor heating system characterized in that the second duct is inserted into the first duct and the adjustment rod is fitted into the first and second notches of the first and second ducts, thereby rotatably attaching the adjustment rod and causing the second duct to abut against the adjustment rod. A support plate that is fixed to the floor of the room and rotatably supports the adjustment rod is provided on the other end side of the adjustment rod, and a rotating plate that can rotate the adjustment rod and can fix the adjustment rod so that it cannot rotate,
The other end of the adjustment rod is provided with a screw hole in the longitudinal direction.
The support plate is L-shaped, and has a first round hole for rotatably supporting the adjustment rod on a surface perpendicular to the floor, and a female screw hole for fixing the rotating plate,
The rotating plate is provided with a second round hole through which a fixing screw for fixing the rotating plate and the adjustment rod is inserted, and an adjustment hole which is a long hole concentric with the second round hole,
The floor heating system described in claim 1, characterized in that the other end of the adjustment rod is inserted into the first round hole, the fixing screw is inserted into the second round hole and screwed into the screw hole to fix the rotating plate and the adjustment rod, the rotating plate is rotated around the center of the second round hole to adjust the adjustment rod, and then a butterfly screw is inserted into the adjustment hole and screwed into the threaded hole to abut and fix the rotating plate and support plate, thereby fixing the adjustment rod so that it cannot rotate. 3. The floor heating system according to claim 2 , wherein the rising portion is not provided with a vent hole for passing outside air, and a heat insulating material is applied to the outside of the rising portion. A blower is installed in the underfloor space to diffuse the hot air sent out from the hot air duct into the underfloor space,
3. The floor heating system according to claim 2 , wherein the hot air blowing member is an underfloor ventilation fan. The bottom plate of the hot air chamber of the pellet stove is provided with a long hole through which the hot air duct passes,
5. The floor heating system according to claim 1, wherein the pellet stove can be moved and adjusted so as to be installed parallel to the wall of the room.

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