JPS61119944A - Hot air type space heater - Google Patents

Abstract

PURPOSE:To let the fan of a hot air type space heater serve as a fan for dehumidification and an exhauster by a method wherein heat-resistant moisture adsorbent is arranged on the downstream side of the heat source of a space heater and the blast for dehumidification and the exhaustion of air are done by the fan of the space heater. CONSTITUTION:During the moisture adsorption cycle, a fan is put into actuation under the state that both a suction damper 31 and a discharge damper 32 are open and a bypass damper 33 is closed and, in addition, a burner is stopped, in order to adsorb the moisture by the amount in the order of 3-10% of the weight of moisture adsorbent. During the regeneration cycle, a burner is ignited under the state that both the suction damper 31 and the discharge damper 32 are closed and the bypass damper 33 is open, resulting in causing the air confined within the casing 17 of a space heater and a bypass section 22 to circulate through the fan 18, a combustion cylinder 11 and the outer periphery of a smoke tube, the moisture adsorbent 51, a lower air chamber 26, the bypass section 22 and an upper air chamber 25. During the circulation of said air, the temperature of the moisture adsorbent 51 is raised to about 80-150 deg.C, resulting in releasing and exhausting the adsorbed moisture through an exhaust pipe 48 outdoors. During the regeneration cycle, the moisture adsorbent 51 releases the moisture and at the same time stores heat in order to give off at the early stage of the moisture adsorption cycle.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a hot air heater, more specifically, a warm air heater for growing plants, etc., which has a dehumidifying function that also dehumidifies using a part of the heating heat. Regarding heaters.

[Conventional technology]

Traditionally, oil-fired or gas-fired heaters have been used to heat agricultural greenhouses in the winter, but recently, in order to save energy, greenhouses have been made more airtight (as well as by minimizing ventilation to reduce heat loss). There is a tendency.

[Problem that the invention seeks to solve]

As a result of the above, the inside of the greenhouse becomes humid, leading to the occurrence of pests and diseases and a decline in the quality of crops.Therefore, there is a tendency to install a dehumidifier in addition to a heater, and the following are used for this.

A heat pump dehumidifier uses a refrigerator to cool and dehumidify greenhouse air, reheats it, and then blows the air, but it is an extremely expensive device.

A rotating honeycomb type dehumidifier rotates a lithium chloride-impregnated/S honeycomb or an activated carbon honeycomb, absorbs moisture in one part of the honeycomb, and dehumidifies and regenerates it in another part, and requires a dedicated heating device for dehumidification and regeneration. .

In both of the above examples, a dedicated dehumidifier is installed for dehumidification, and the refrigerator power, heating energy,
There is a problem in that not only is the blowing power and the like otherwise wasted, but the cultivation area within the greenhouse is also sacrificed.

[Means for solving problems]

The present invention provides a warm air heater for growing plants that solves the above-mentioned problems and performs heating and dehumidification in one device, thereby saving energy and space. A heating machine, in which a heat-resistant moisture absorbent is arranged downstream of the heat source of the heater, a blower of the heater blows air for dehumidification and exhausts air, and the heater is used to heat and regenerate the moisture absorbent. A hot air heater characterized in that the heat resistant moisture absorbent described above is arranged upstream of the heat source; A hot-air heater is arranged in an open container, and the container is placed on a shelf-like golden odor in use, and the side plate of the heater is removed and detachable from the side of the heater. The end is thickened to surround the motor, and the other end is configured as a cylinder that extends outside the heater.A damper is placed on the opposite side of the motor to adjust the amount of air introduced, cooling the motor and separating it from the moisture absorbent. This is achieved by providing a warm air heater configured to discharge the water vapor to the outside.

[Effect]

The above device places a heat-resistant moisture absorbent on the upstream or downstream side of the heat exchange hot air heater to adsorb moisture in the intake air.
It dehumidifies air and adds a dehumidifying function to the warm air heater.
The blower of the warm air heater functions as both a dehumidifying blower and an exhaust fan, without the need to specifically provide a blower and an exhaust fan to provide a dehumidifying function.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a central sectional view of the first embodiment of the present invention, and FIG. 2 is a central sectional view of the first embodiment of the present invention.
FIG. 3 is a cross-sectional view of the second embodiment of the present invention, which is a cross-sectional view taken along line nn in the figure and in the direction of the arrow.

First, the function of the first embodiment (which is placed in a greenhouse (not shown)) as a heater will be explained.
Liquid fuel or gaseous fuel injected from a burner 16 inside the greenhouse generates a combustion flame 15, and the combustion gas passes through a smoke pipe 12 and a rear smoke chamber 13, and is discharged outside the greenhouse by a smoke guide member 14. When viewed in cross section, the smoke pipe 12 has a structure in which a plurality of small holes are formed like the holes in a lotus root.

Heating air enters the upper air chamber 25 from the suction port 19 by the blowers 18a and 18b, and is passed through the combustion pipe 11 and the smoke pipe 12.
The temperature rises on the surface of the air, and the air is sent into the greenhouse from the air outlet 20 through the lower air chamber 26. The suction rod damper 31 and the discharge outlet damper 32 (FIG. 2) are in the open position shown by solid lines during heating operation.

The bypass section 22 is attached to the side of the heater casing 17 with screws 24 and connects the upper air chamber 25 with the connection 2
3, it is connected to the lower air chamber 26 through a connecting portion 21, and a damper 33 is provided at this connecting portion 21. During heating operation, the damper 33 is in the closed position (indicated by a solid line)
It is in.

During heating operation, hot air passes through pellet-shaped heat-resistant moisture absorbent 51. Immediately after the burner is ignited, the moisture absorbent 51 absorbs heat, but
Eventually, a steady temperature is reached and heat absorption stops. On the other hand, since the heat is radiated and cooled when blowing air after burner insulation, the moisture absorbent 51 acts as a kind of heat storage agent during heating operation, and radiates all of the absorbed heat, so not only does it not result in heat loss at all, but rather the burner It can alleviate the sudden rise in air temperature when igniting and the sudden drop in air temperature when the burner burns out, providing a gentle heating effect.

As described above, the suction damper 31, the discharge damper 32, and the bypass damper 33 are blown at the positions shown by solid lines,
If the burner 15 is turned on and off by a thermostat (not shown), it can be continuously operated as a soft, high-quality heater with slow rise and fall in hot air temperature.

Next, a case will be described in which the embodiment of the present invention is operated intermittently as a heater with a dehumidifying function. It is 15-305-3
This method alternately repeats a cycle of about 0 minutes and a regeneration cycle of about 5 to 15 minutes. In the moisture absorption cycle, the suction damper 31 and the discharge damper 32 are opened, and the bypass damper 33 is closed (
(Both positions are indicated by solid lines), and the blower is operated with the burner stopped so that about 3 to 10% of the moisture absorbent 51's own weight is adsorbed.

In the regeneration cycle, the suction damper 31 and the discharge damper 32 are closed, the bypass damper 33 is opened (both are at the position indicated by the broken line, and the burner is ignited). Heating machine casing 17
, the air trapped in the bypass section 22 is transferred to the blower 18, the outer periphery of the combustion tube 11 and the buried pipe 12, and the moisture absorbent 5.
1, circulates through the lower air chamber 226, the bypass section 22, and the upper air chamber 25, during which the moisture absorbent 51 is 80-1
The temperature is raised to about 50° C., the adsorbed moisture is desorbed, and the water is discharged outside the greenhouse through the exhaust pipe 48.

Reference numeral 43 denotes a cooling air introduction pipe for the blower motor 40. One end is thick and surrounds the motor, and the other end is configured as a cylinder extending to the outside of the heater. Air sucked in from the upper part is passed through the air introduction pipe. It passes through the gap 42 between the lower part 41 and the blower motor 40, and serves to cool and protect the blower motor 40.

In addition to the desorbed water vapor, the exhaust pipe 48 also exhausts air in an amount equal to the intake air volume from the cooling air introduction pipe 43. Although an exhaust air blower la (not shown) can be attached to the exhaust pipe 48, the air is sucked in by the suction force of the air blower 18 itself and pushed out from the exhaust pipe 48, so the exhaust air blower is not necessary.

Further, the amount of introduced air and the amount of discharged air can be adjusted by an introduced air adjustment damper 46. The cooling air introduction pipe 43 is suspended and fixed from a hole 47 in the upper surface of the upper air chamber 25 by a flange 45 provided at the upper part and screws 44 .

In the regeneration cycle, the hygroscopic agent 51 desorbs moisture, raises its temperature, and stores heat. This stored heat is radiated at the beginning of the moisture absorption cycle and is supplied to the greenhouse as heating heat.

The shaft 34 of the suction damper 31, the shaft 35 of the discharge damper 32, and the shaft 36 of the bypass damper 33 are connected by a link device (not shown), and are automatically activated by a damper motor (not shown) and a timer (not shown). It is designed to open and close in conjunction with the

Heat-resistant builder clay, zeolite,
For use, alumina, activated carbon, etc. formed into a pellet shape are spread in a container to a thickness of about 50 to 200 mm. 52 is a moisture absorbent container, and the moisture absorbent 1' is placed on the bottom.
! There is a wire mesh 50 whose mesh is narrower than the r diameter, and the top surface is open. As shown in FIG. 4, the one-hour dampening agent container 52 is placed on a shelf-shaped metal fitting 39, and can be easily taken out laterally by loosening the screws 38 and removing the side plate 37 of the heater. It has become.

Although there is an example in which a moisture absorbent is filled between two wire meshes with an interval of about 50 to 200 mm and the whole is used vertically as one plate-like element, in the present invention, as described above, Since only the bottom is a wire mesh and the top is open, the container is spread out flat and can be attached and removed from the side, so it has the advantage of being extremely easy to fill, replace, and dispose of the moisture absorbent.

FIG. 3 is a diagram showing a second embodiment of the present invention, and parts having the same functions as those shown in FIG. 2 are designated with the same numbers. a moisture absorbent 51 in the bypass section 22;
An air inlet 19 is installed at the bottom of the bypass section 22. In order to increase the dehumidification capacity, the amount of moisture absorbent filled is increased, and in order to reduce ventilation resistance, the moisture absorbent is arranged in four layers in parallel.

By removing the screws 38 and side plate 37, the moisture absorbent container 5 can be removed.
2 can be attached and detached from the side, and the upper surface of the moisture absorbent container 52 is open, making it extremely easy to fill, replace, and dispose of the moisture absorbent.

In the moisture absorption cycle, the suction damper 31 and the discharge damper 32 are open and the bypass damper 33 is closed (both positions indicated by solid lines) to blow air, and the humid air in the greenhouse flows through the suction port 19 and the moisture absorbent 5.
1. Dehumidifying air is blown into the greenhouse through the upper air chamber 25, the blower 18, the lower air chamber 26, and the discharge port 20.

In the regeneration cycle, the suction damper 31 and the discharge damper 32 are closed, and the bypass damper 33 is open (both at the position of the broken line, °
case number), the burner is ignited and the heated hot air is sent to the lower air chamber 26, the moisture absorbent 51, the upper air chamber 29, and the blower 1.
8, the temperature of the moisture absorbent 51 is increased, the absorbed moisture is desorbed, and the moisture is discharged from the exhaust pipe 48 to the outside of the greenhouse. The amount of heat generated by the heating of the moisture absorbent during the regeneration cycle is radiated into the greenhouse as warm air at the beginning of the next moisture absorption cycle, resulting in heating output. In the embodiment shown in FIG. 3, the moisture absorbent 51 is placed on the suction side of the blower and upstream of the heat source, so even if the burner is ignited to blow air during the moisture absorption cycle, the temperature of the moisture absorbent 51 does not rise. It can provide heating while absorbing moisture. On the other hand, the second
In the illustrated embodiment, the moisture absorbent 51 is located on the discharge side of the blower and on the downstream side of the heat source, so when the burner is ignited during the moisture absorption cycle, the temperature of the moisture absorbent 51 rises to the heating air blowing temperature, reducing the moisture absorption ability. During the season when the heating load is light, the burner operating time during the moisture absorption cycle is short (so the moisture absorption capacity does not decrease much).

Effects of CQ Light] As explained above, according to the present invention, a heat-resistant moisture absorbent is placed in the heating air passage of a hot air heater, and hot air heating is achieved by opening and closing the suction damper, discharge damper, and bypass damper. It is possible to add dehumidification capability to the machine, and there is no need for a special blower or exhaust fan for dehumidification.Since the blower and the heat source for heating and regenerating the moisture absorbent are shared with the heater, it can be used in addition to hot air heaters. Compared to the case where a dedicated dehumidifying machine is installed, both the installation costs and operating costs are lower, and the equipment occupies less space within the greenhouse, resulting in a large economical effect in that the greenhouse can be used more effectively.

The embodiments of the present invention have been explained using heating and dehumidification of a greenhouse for growing plants as an example, but the scope of the present invention is not limited to that case. drying,
This also applies to various industrial drying applications.

[Brief explanation of the drawing]

FIG. 1 is a central sectional view of the first embodiment of the present invention, FIG. 2 is a sectional view taken along line nn in FIG. 1 in the direction of the arrow, and FIG. Figure 4 is a perspective view of the moisture absorbent container; Figure 5 is a sectional view taken along the line V-V in Figure 2 in the direction of the arrow; Figure 6 is the Vl in Figure 3. It is a sectional view taken along the -Vl line in the direction of the arrow. In the figure, 11 is a combustion tube, 12 is a smoke pipe, 13 is a rear smoke chamber, 1
4 is a smoke guide member, 15 is a combustion flame, 16 is a burner, 17 is a heater casing, 18.18a, 18b are blowers,
19 is an inlet, 20 is an outlet, 21 and 23 are connection parts, 2
2 is a bypass section, 24 is a screw, 25 is an upper air chamber, 26 is a lower air chamber, 31 is an inlet damper, 32 is a discharge rod damper, 33 is a bypass damper, 34.35.36
is the shaft, 37 is the side plate, 38 is the screw, 39 is the metal fitting, 4
0 is the blower motor, 41 is the lower part of the air introduction pipe, 42 is the gap, 43 is the cooling air introduction pipe, 44 is the screw, 45 is the flange, 46 is the introduction air adjustment damper, 47 is the hole, 48 is the exhaust pipe, 50 is the wire mesh , 51 represents a heat-resistant moisture absorbent, and 52 represents a moisture absorbent container, respectively. Patent Applicant Nebon Co., Ltd. Representative Patent Attorney Akira Kukimoto Figure 2 Figure 8 Figure 3 Figure 5 Figure 6

Claims (4)

[Claims] (1) A heat exchange hot air heater, in which a heat-resistant moisture absorbent is arranged downstream of the heat source of the heater, and the blower of the heater blows air for dehumidification and exhausts the air, and the moisture absorbent 1. A hot-air heater, characterized in that the heat source of the heater is used for heating and regenerating the air. (2) The hot air heater according to claim 1, wherein the heat-resistant moisture absorbent is disposed upstream of the heat source. (3) The moisture absorbent is placed in a container with a wire mesh at the bottom and an open top. When in use, the container is placed on a shelf-like metal fitting, and the side plate of the heater can be removed and removed from the side of the heater. A warm air heater according to claim 1, characterized in that the hot air heater has a configuration as follows. (4) The blower has a cylindrical shape with one end thickened to surround the motor and the other end extending outward from the heater, and a damper arranged on the opposite side of the motor to adjust the amount of air introduced. ,
Claim 1, characterized in that the motor is cooled and the water vapor released from the moisture absorbent is discharged to the outside.
Hot air heater as described in section.