JPH11201480A - Pneumatic floor heating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure an optimal air volume of a fan by providing a second heat source unit for taking in warm air being blown from a first heat source unit after it is fed through an air channel formed in the floor in order to heat the floor and blowing reheated air into a room. SOLUTION: A first heat source unit 1 comprising a heat exchanger 5 and a fan 7 heats up the air in a room 11 being taken in from an air inlet 9 through heat exchange when the air passes through the heat exchanger 5 and feeds the air being taken in from the air inlet 9 into an air passage, i.e., a duct 13, by rotating the fan 7. Furthermore, the air in the room 11 being taken in from an air inlet 25 provided in the duct 13 is heated up through heat exchange when the air passes through the heat exchanger 21 of a second heat source unit and the air being taken in from the air inlet 25 is blown into the room 11 from an air inlet 27 provided in the duct 13 by rotating a fan 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pneumatic floor heating device.

[0002]

2. Description of the Related Art Conventionally, as a pneumatic floor heating device, as shown in Japanese Patent No. 2608967, for example, a heated air is blown out into a duct passage inside a floor by a heat source device such as a heat exchanger. Warm the floor as warm air passes through the aisles. The air that has warmed the floor is blown into the room from the duct outlet, taken into the heat source equipment, and heated again to repeat the circulation blown out into the duct passage, thereby performing floor heating. .

[0003]

When the air blown from the heat source equipment flows through the duct passage, the pressure loss increases in proportion to the length of the duct passage. For example, if the duct passage is 5 m, the pressure loss in the duct passage is 2
the mmH ₂ 0. If this is doubled in 10 m, the pressure loss is 4mmH ₂ 0 next to the da transfected passage for the pressure loss, and lead to deterioration of the fan air volume, is not performed floor heating which is set.

[0004] On the other hand, the air passing through the duct passage is also blown into the room from the duct outlet to provide a function of warming the room.

[0005] Since the air blown into the room from the duct outlet is after the floor has been warmed, the energy for warming the room is small and it is difficult to quickly raise the room temperature.

In this case, in order to increase the energy for warming the room, the temperature of the air blown out from the heat source device may be increased, but the temperature of the floor surface is too high.
It was difficult to control the floor surface and the room temperature to the respective set temperatures.

In view of the above, the present invention provides a pneumatic floor in which an optimum fan air volume can be obtained irrespective of the length of a duct passage and a floor surface and a room temperature can be controlled independently. It is intended to provide a heating device.

[0008]

In order to achieve the above-mentioned object, the present invention provides a method for supplying warm air blown from a heat source device.
In a pneumatic floor heating device that flows through an air passage formed inside the floor and warms the floor surface, a second air that flows through the air passage, takes in the air after performing floor heating, heats again, and blows out the room. Equipped with heat source equipment.

Further, as another preferred embodiment, there is provided a heat exchanger and a fan, each of which first blows warm air exchanged by the heat exchanger into an air passage inside the floor.
A heat exchange unit having a heat exchange unit and a second heat exchange unit that flows through the air passage, takes in air after performing floor heating, and blows out the room without heat exchange or heat exchange again. I do.

[0010] According to the pneumatic floor heating device, warm air blown out from the heat source device passes through the air passage.
At this time, the floor is heated to perform floor heating. The air that has passed through the air passage is taken into the second heat source device, reheated again, and blown out into the room.

As a result, the sent air is forcibly taken in, so that an optimum air volume can be obtained according to the length of the air passage. In addition, the control of the floor surface temperature and the room temperature can be performed independently.

Further, in the present invention, one of the air after the floor heating and the indoor air is selected so that either the floor heating or the indoor heating can be selected. 2 is provided with a flow path switching device for feeding the heat to the second heat exchange section.

According to the present invention, in order to reduce the influence of the pressure loss at the time of taking in air, the air after floor heating is sent to the downstream side of the second heat exchanger in the heat exchanger. It has a guide passage.

Further, according to the present invention, the fan of the first heat exchange section and the fan of the second heat exchange section are so arranged that the amount of circulating air in the air passage and the amount of circulating air in the room can be independently controlled. The number of rotations of the fan is freely controllable.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a first heat source device constituting a pneumatic floor heating device, and reference numeral 3 denotes a second heat source device.

The first heat source device 1 includes a heat exchanger 5 and a fan 7. The heat exchanger 5 constitutes a refrigeration cycle including a compressor, an outdoor heat exchanger, a throttle mechanism, and the like, and air in the room 11 taken in from the suction port 9 exchanges heat when passing through the heat exchanger 5. Is carried out and heated.

When the fan 7 rotates, the air taken in from the suction port 9 is sent out into a duct passage 13 as an air passage.

The duct passage 13 is composed of a floor 15 such as a flooring and a discard 17 disposed below the floor 15, and a portion facing the fan 7 is a duct inlet 19.

The second heat source device 3 comprises a heat exchanger 21 and a fan 23. The heat exchanger 21 forms a refrigeration cycle with a compressor, an outdoor heat exchanger, a throttle mechanism, and the like, not shown,
When the air in the room 11 taken in from the suction port 25 passes through the heat exchanger 21, heat is exchanged and heated.

The fan 23 rotates, so that the
The air taken in from 5 is blown into the room 11 via a duct outlet 27 provided in the duct passage 13.

In the pneumatic floor heating apparatus thus configured, when performing floor heating and indoor air conditioning, hot air is blown from the first heat source device 1 toward the duct passage 13. When warm air passes through the duct passage 13, the floor surface 15 is heated to perform floor heating. The heated air is taken into the second heat source device 3 and blown out from the duct outlet 27 into the room 11.

During the heating operation on the floor 15, even if the duct passage 13 is long, even if the duct 23 is long, the fan 23 of the second heat source device 3 forcibly sucks the air in the duct passage 13 to reduce the pressure loss. The specified air volume is secured without being affected.

Specifically, for example, when the outside air temperature was 10 ° C. and the temperature of the air blown into the duct passage 13 was set at 30 ° C., a floor surface temperature of 25 ° C. was obtained.

At the same time, approximately 25
° C warm air was blown out, and a room temperature of 20 ° C was obtained.

In this embodiment, since the floor heating is mainly used, the room temperature is determined by the temperature of the hot air blown from the duct outlet 27.

Therefore, in order to raise the temperature only at room temperature by 5 ° C. to 25 ° C., as shown in FIG. 2, the hot air blown from the first heat source device 1 into the duct passage 13 is 30 ° C., and the second heat source device is heated. 3
By setting the warm air blown from the room into the room 11 at 30 ° C, 25
The floor surface temperature and the room temperature of ° C. can be reliably obtained without being affected by the length of the duct passage 13.

Next, in order to raise both the floor surface temperature and the room temperature by 5 ° C., and to set the floor surface temperature to 30 ° C. and the room temperature to 25 ° C., as shown in FIG. By setting the warm air blown into the passage 13 to 35 ° C. and the warm air blown from the second heat source device 3 to the room 11 to 35 ° C., a floor surface temperature of 30 ° C. and a room temperature of 25 ° C. can be obtained. become.

FIG. 4 shows another embodiment in which the floor heating air blown out from the first heat source device 1 is returned to the first heat source device 1 and blown out into the room 11.

That is, between the floor surface 15 and the waste 17
A forward duct passage 29 and a return duct passage 31 are provided, and a forward duct passage 29 and a return duct passage 31 are provided.
And communicates. The outgoing duct passage 29 communicates with the first heat source device 1 installed near the wall serving as one end, so that heated warm air is sent into the duct passage 29.

The return duct passage 31 serves as a return passage through which the hot air sent into the outward duct passage 29 returns as shown by the arrow, and is provided on both sides of the first heat source device 1 which is the final end. Are each provided with a duct outlet 33 that blows out into the room 11.

A second heat source device 35 is arranged in the lower return duct duct 31 serving as the duct outlet 33.

As shown in FIG. 5, the second heat source device 35 is provided with a duct outlet 3 to improve maintenance.
3 may be raised above the floor surface 15 by the duct case 37 and installed in the duct case 39.

Since the structures of the first and second heat source devices are the same as those in the first embodiment, the same reference numerals are given and the detailed description is omitted.

According to this embodiment, the duct passage 2
9 and 31 are twice as long on the outward route and the return route. As a result, the pressure loss is twice as large as the forward path, but by controlling the number of rotations of the fan 33 of the second heat source device 39, an optimal air volume is ensured corresponding to the length of the duct passages 29 and 31. You.

FIGS. 6 and 7 show the heat exchanger 41 and the fan 4.
3 is divided into upper and lower parts, and one of the heat source devices 45 is used for sending out hot air and the like, and the other is made to function as an outlet for taking in the sent out hot air and blowing it into the room. It is shown.

That is, between the floor surface 15 and the waste 17
A partition member such as a joist 42 is arranged to form a forward duct passage 44 through which the blown warm air or the like passes, and a return duct passage 46 returning from the forward duct passage 44 and returning. ing. A heat source device 45 such as an air conditioner is installed near a wall that is one end of the outward duct passage 44.

The heat source device 45 is vertically divided by a partition wall 49, and a first heat exchange section 51 composed of a heat exchanger 41 and a fan 43 is disposed in the lower unit. The air in the room 11 is
The hot air or the like is blown out into the duct passage 44 for the outward path through the air passage.

In the upper unit, a second heat exchanging section 57 comprising a heat exchanger 41 and a fan 43 is arranged. The second heat exchange section 57 takes in the returned air from the return duct duct 46 from the suction port 63 via the guide duct 59 as the guide path and the connection unit 61, and blows the return air into the room 11 from the outlet 65. It comes out.

Each of the heat exchangers 41, 41 of the first and second heat exchangers 51, 57 constitutes a refrigeration cycle including a compressor (not shown), an outdoor heat exchanger, a throttle mechanism, and the like. Thereby, for example, in the cooling operation mode, the air is used as an evaporator, and is cooled by heat exchange by evaporation heat, so that the cold air is sent out to the room 11. In addition, in the heating operation mode, the air conditioner is used as a condenser, is heated by heat exchange by condensation heat, and is sent out to the room 11.

Therefore, the case where floor heating is performed in the second embodiment will be described. When the air in the room 11 taken in from the suction port 53 of the first heat exchange section 51 passes through the heat exchanger 41, The air is warmed and blown out as warm air into the outward duct passage 44. The blown hot air warms the floor surface 15 and heats the floor when passing through the duct passage 44 for the outward path and the duct path 46 for the return path. The return air that has warmed the floor surface 15 flows from the suction port 63 through the induction duct 59 and the connection chamber 61 to the second heat exchange section 5.
After being taken into the chamber 7, it is heated again and blown out from the outlet 65 into the room 11.

In this heating operation, even if the duct passages 44 and 46 are doubled due to the reciprocating path, the suction operation of forcibly sucking the returning air is obtained by the fan 43 of the second heat exchange unit 57. Therefore, a predetermined air volume can be secured without being affected by the pressure loss of the duct passage.

Further, since the heat source device 45 is installed on the floor surface 15, maintenance of the first and second heat exchange units 51 and 57 becomes easy.

FIGS. 8 and 9 show a third embodiment in which either the heated return air or the air in the room 11 can be selectively introduced into the second heat exchange section 57. It shows the form.

That is, the connection chamber 63 provided at the suction port 63 of the second heat exchange section 57 is
And a return air inlet 69 are provided.
Is connected to a guide duct 71 that guides return air from the return duct passage 46 to the second heat exchange unit 57.

The indoor air inlet 67 and the return air inlet 69
Is switched by a switching damper 73 serving as a channel switching device.
Opening and closing can be controlled so that when one of them opens, the other closes.

The other components are the same as those shown in FIG. 6, and the same reference numerals are given, and detailed description is omitted.

Therefore, the case of performing floor heating in the third embodiment will be described. As shown in FIG. 8, the indoor air intake 67 is closed by the switching damper 73 and the first heat exchange section 51 Blowing out hot air,
The hot air flows through the duct path 44 for the outward path and the duct path 46 for the return path, thereby performing floor heating. The air that has warmed the floor 15 is introduced into the second heat exchange unit 57 via the guide duct 71, the return air inlet 69, and the inlet 63, and then heated, and is heated from the outlet 65 to the room 11. Be blown out to.

On the other hand, in order to adjust the temperature of the room 11 without performing floor heating, as shown in FIG.
The return air inlet 69 is closed by the
The operation of the first heat exchange unit 51 of the heat exchange units 51 and 57 is stopped.

As a result, warm air does not flow inside the floor, and the air in the room 11 taken in from the room air intake 67 is exchanged and heated when passing through the heat exchanger 41, and is heated. The warm air is blown from the outlet 65 into the room 11. Thereby, the temperature of the room 11 can be adjusted.

The heat exchanger 41 of the second heat exchange section 57
By using as an evaporator in the cooling operation mode, cool air can be obtained.

FIG. 10 shows a fourth embodiment in which the duct circulation air volume and the indoor circulation air volume can be controlled independently of each other.
1 is an embodiment of the present invention.

That is, the guide duct 75 which is connected to and communicates with the end of the return duct passage 46 which returns from the forward duct passage 44 and extends back to the outside of the wall surface 77 is provided, and the second heat duct is provided. The structure is such that it communicates with the back part which is the downstream side of the exchange part 57.

On the other hand, the fan 43 of the first heat exchange section 51
And the fan 43 of the second heat exchange section 57 can independently control the rotation speed from high speed to low speed.

The other components are the same as those shown in FIG. 6, and therefore the same reference numerals are given and the detailed description is omitted.

Therefore, in the fourth embodiment, a description will be given first of the time of the floor heating operation (when the heat exchanger 41 of the second heat exchange unit 57 is not required).

First, when the first heat exchanging section 51 is set to the operating state and only the fan 43 of the second heat exchanging section 57 is operated at a low speed, the room 11 taken in from the suction port 53 of the first heat exchanging section 51 is operated. Is exchanged and warmed when passing through the heat exchanger 41. The warmed warm air is blown into the outward duct passage 44. Outgoing duct passage 44
The warm air blown into the inside is heated by returning the floor surface 15 when returning from the outward duct passage 44 and flowing through the return duct passage 46, thereby performing floor heating.

The air that has warmed the floor 15 is supplied to the induction duct 75.
Is taken into the second heat exchange section 57 and is blown directly into the room 11 without passing through the heat exchanger 41. At this time, the low-speed rotation of the fan 43 allows the air in the room 11 to be taken in from the suction port 63, but this is coupled with the pressure loss when passing through the heat exchanger 41 and the internal conditions slightly higher than the atmospheric pressure due to pressurization. The return air is reduced to the inlet 6
With almost no air coming from 3
From the room 11.

Next, during floor heating operation (second heat exchange section 5
7, when the heat exchanger 41 is required).

As shown in FIG. 11, the first and second heat exchanging sections 51 and 57 are operated, and the fan 43 of the second heat exchanging section 57 is replaced with the fan 43 of the first heat exchanging section 51. Use a higher number of revolutions and a higher air volume.

Thus, the warm air blown out from the first heat exchange section 51 warms the floor surface 15 when flowing through the duct path 44 for the outward path and the duct path 46 for the return path. The air that has warmed the floor 15 is taken into the second heat exchange unit 57 through the induction duct 75 and does not pass through the heat exchanger 41,
3, the air is blown out from the air outlet 65 into the room 11.

At this time, the fan 43 of the second heat exchange section 57
By the rotation of the hot air, about 50% is taken in from the induction duct 75 and about 50% from the suction port 63 on the front face, and the hot air that has undergone heat exchange when passing through the heat exchanger 41 joins the return air from the induction duct 75, The air is blown into the room 11.

Next, the first heat exchange section 51 is stopped,
The case where only the heat exchange section 57 is operated will be described.

As shown in FIG. 12, during the operation of the second heat exchange section 57, the pressure loss when the air from the inlet 63 passes through the heat exchanger 41 becomes 1.5 mmH ₂₀ .

On the other hand, the pressure loss of the heat exchanger 41 of the first heat exchange section 51 in which the operation is stopped is 1.5 mmH ₂₀ . In addition, the duct passages 44 and 46 for the outbound and inbound routes
Pressure loss between the inner and the induction duct 75 is 2.0mmH ₂ 0
Since the pressure loss of the total sum is 3.5 mmH ₂₀ , although a small amount of air is taken in through the induction duct 75, the inside of the room 11 is only supplied from the suction port 63 of the second heat exchange unit 57. Air is taken in.

The air taken in from the inlet 63 undergoes heat exchange when passing through the heat exchanger 41, and the warmed warm air is blown out from the outlet 65 into the room 11.

In this embodiment, by using the heat exchanger 41 of the second heat exchange section 57 as an evaporator in the cooling operation mode, it is possible to blow cool air into the room 11.

Next, a specific control example of the duct circulation air volume and the indoor circulation air volume will be described.

First, as shown in FIG. 13, the case where the duct circulation air volume is 100% and the indoor circulation air volume is 0%.

For example, the duct circulation air volume is about 200 mm ³
/ H, the fan 43 of the first heat exchange section 51 is operated at a fan capacity of 80%. On the other hand, in the second heat exchange section 57, since a pressure loss occurs in the duct passages 44 and 46, the fan 4
By operating the fan at a fan capacity of 20% at 20%, a desired duct circulation air volume can be obtained.

Second, as shown in FIG. 14, the case where the duct circulation air volume is 50% and the room circulation air volume is 50%.

For example, the outlet 65 of the second heat exchange section 57
In order to secure a blowout amount of about 400 m ³ / h, the operation is performed with the fan capacity of the fan 43 of the second heat exchange section 57 set to 80%. At this time, in order to allow the duct air volume and the indoor air volume to flow at the same air volume of, for example, 200 m ³ / h, it is necessary to make the pressure loss in the A and B regions equal. Therefore, the pressure loss when 200 m ³ / h flows in the region A is due to the heat exchanger 41
The 1.5mmH ₂ 0 as it passes through the.

The pressure loss when 200 m ³ / h flows in the area B is 1.5 mmH ₂₀ when passing through the heat exchanger 41 and ₂ mmH ₂₀ + fan pressure loss in the duct area. Therefore, BA = ₂ mmH ₂ 0 + fan pressure loss. To compensate for the pressure loss, by operating the fan capacity of the fan 43 of the first heat exchange unit 51 at 50%, the desired blowing amount can be reduced. Secured.

Third, as shown in FIG. 15, the case where the duct circulation air volume is 0% and the room circulation air volume is 100%.

For example, the indoor circulation air volume is about 200 m ³ / h
In order to be able to flow, the fan 4 of the first heat exchange section 51
3 is stopped, and the operation is performed with the fan capacity of the fan 43 of the second heat exchange unit 57 set to 100%. At this time, the intake of air from the induction duct 75 is suppressed to be small due to the pressure loss of the first heat exchange unit 51 and the duct passages 44 and 46, and at the same time, the air from the suction port 63 of the second heat exchange unit 57 to the inside of the room 11 Air is taken in. The taken-in air is heated when passing through the heat exchanger 41, and is blown out from the outlet 65 into the room 11 again.

Although the above has been described in three ways, in practice, it is desirable to consider the setting of the fan air volume of each fan 43 at intervals of about 10% so that a desired operation control ratio can be obtained. .

Since the value of the pressure loss, ₂ mmH ₂₀ , changes depending on the length of the duct passage, it is desirable to perform weighting in accordance with the change.

In the second to fourth embodiments, the first heat exchanging section 51 and the second heat exchanging section 57 constituting the heat source device 45 are vertically arranged. However, the present invention is not limited to this. Similar effects can be obtained even if they are arranged on the left and right instead of the ones.

[0079]

As described above, according to the pneumatic floor heating apparatus of the present invention, the optimum floor heating can be performed without being affected by the length of the duct passage. In addition, the floor heating temperature and the room temperature can be controlled independently of each other.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing a pneumatic floor heating device according to the present invention.

FIG. 2 is a schematic explanatory view similar to FIG. 1 in which the floor surface temperature is maintained as it is and only the indoor temperature is increased.

FIG. 3 is a schematic explanatory view similar to FIG. 1 in which both the floor surface temperature and the indoor temperature are increased.

FIG. 4 is a schematic perspective view of the whole showing a pneumatic floor heating device.

FIG. 5 is a schematic perspective view of the entire pneumatic floor heating device showing an embodiment in which a second heat source device is provided in parallel with the first heat source device.

FIG. 6 is a schematic explanatory diagram of a pneumatic floor heating device in which a heat source device is divided into a first heat exchange unit and a second heat exchange unit, one of which is for sending out and the other is for blowing out.

FIG. 7 is a schematic perspective view of the entire pneumatic floor heating device of FIG. 6;

FIG. 8 is a schematic explanatory diagram similar to FIG. 6, in which one of a return air having a warmed floor surface and indoor air is selectively introduced into a second heat exchange unit.

FIG. 9 is a schematic explanatory view similar to FIG. 8, in which indoor air is taken in.

FIG. 10 is a schematic explanatory view of a pneumatic floor heating device in which return air having a heated floor is introduced into a second heat exchange section without passing through a heat exchanger.

FIG. 11 is an operation explanatory view in which return air and indoor air are taken in at 50% and 50%, respectively, in FIG. 10;

FIG. 12 is an operation explanatory diagram of FIG. 10, in which the operation of the first heat exchange unit of the first and second heat exchange units is stopped.

FIG. 13 is an operation explanatory diagram in which a duct air volume is 100% and an indoor air volume is 0% in FIG. 10;

FIG. 14 is an operation explanatory diagram in FIG. 10 in which a duct air volume is 50% and an indoor air volume is 50%.

FIG. 15 is an explanatory diagram of the operation in FIG. 10 with a duct air volume of 0% and an indoor air volume of 100%.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat source apparatus 3 2nd heat source apparatus 11 Room 13 Duct passage 15 Floor surface

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsuya Koido 8 Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture Inside Toshiba Living Space Systems Research Institute (72) Inventor Nobuyuki Takeya 8 Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa Address Co., Ltd. Toshiba Living Space Systems Research Laboratory

Claims (5)

[Claims] 1. An air-floor heating device that warms a floor by flowing warm blown air from a heat source device into an air passage formed inside a floor. A pneumatic floor heating device comprising a second heat source device which takes in, reheats, and blows out the room. 2. It has a heat exchanger and a fan, respectively.
A first heat exchange section for blowing warm air exchanged by the heat exchanger into an air passage inside the floor, and the air after flowing through the air passage and performing floor heating and taking in the heat again. Alternatively, a pneumatic floor heating device including a heat source device provided with a second heat exchange unit that blows out indoors without performing heat exchange. 3. The apparatus according to claim 2, further comprising a flow path switching device for selecting one of the air after the floor heating and the indoor air and sending the selected air to the second heat exchange unit. The pneumatic floor heating device as described. 4. The pneumatic floor heating device according to claim 2, further comprising an induction passage for sending air after floor heating to a downstream side of the heat exchanger of the second heat exchange section. . 5. The system according to claim 1, wherein the number of rotations of the fan of the first heat exchange unit and the number of rotations of the fan of the second heat exchange unit are controllable, and the amount of indoor air suction is controlled. 4. The pneumatic floor heating device according to 4.