JP4057469B2 - Garbage processing machine - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a garbage processing machine that measures the weight reduction by heating and drying the garbage from a factory, a restaurant, a hotel, a general household, and the like.
[0002]
[Prior art]
As a garbage processing machine that heats and drys garbage, a method of heating to high temperature with an electric heater or high temperature air obtained by burning liquid fuel such as gas or kerosene with a burner and exchanging heat with the combustion heat is used. Although there is a method of spraying and drying garbage, the present inventor has invented a garbage processing machine of the type shown in FIG. 8 that burns liquid fuel such as kerosene with a burner.
[0003]
Referring to FIG. 8, an odor air combustion chamber 52, a deodorizing catalyst 53, an orthogonal heat exchanger 54, an exhaust path are provided downstream of a burner 51 that generates combustion heat for heating and drying raw garbage put into the drying container 50. 55 is arranged. The orthogonal heat exchanger 54 is configured such that one path communicates with the deodorizing catalyst 53 and the exhaust path 55 and the other path communicates with a circulation duct 56 and a high-temperature air duct 57 that circulate the air in the drying container 50. It is what. That is, an internal air circulation path 58 including the drying container 50, the circulation duct 56, the orthogonal heat exchanger 54, and the high temperature air duct 57 is formed. Reference numeral 59 denotes odor air suction means for introducing odor air from the inside of the drying container 50 into the odor air combustion chamber 52.
[0004]
According to this configuration, the odorous air sucked from the inside of the drying container 50 by the odorous air suction means 59 flows into the odorous air combustion chamber 52 along with the heat drying process of the garbage. The odor component of the odor air is thermally decomposed in the odor air combustion chamber 52 by the combustion flame of the burner 51, and the odor component that is not thermally decomposed is also oxidized by the deodorization catalyst 53 activated by the combustion heat of the burner 51. As a result of being decomposed and having almost no odor component, the air is discharged to the outside from the exhaust passage 55.
[0005]
The air in the drying container 50 also flows into the orthogonal heat exchanger 54 through the circulation duct 56. Since the orthogonal heat exchanger 54 disposed downstream of the deodorizing catalyst 53 is also heated by the combustion heat of the burner 51, the air in the drying vessel 50 introduced into the orthogonal heat exchanger 54 by the circulation duct 56 is orthogonally heat exchanged. While passing through the vessel 54, it becomes hot air, enters the drying container 50 again via the high-temperature air duct 57, and heats and drys the garbage. As described above, in the drying container 50, the high temperature air diffuses through the internal air circulation path 58, so that the garbage can be efficiently dried. Further, the odor component generated when the garbage is dried also has the odor air combustion chamber 52 and the deodorization. Since it is decomposed by the catalyst 53, a garbage dryer with less odor can be supplied.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-104910
[Problems to be solved by the invention]
However, in a conventional garbage processing machine, depending on the type of garbage to be input, part of the garbage may become dust when drying progresses. The air inside the drying container passes through the orthogonal heat exchanger via the circulation duct and becomes high-temperature air and is again introduced into the drying container from the high-temperature air duct. Therefore, the dust is also orthogonal to the circulating air. It will pass through the heat exchanger. Furthermore, the orthogonal heat exchanger increases the contact area with the air in order to efficiently exchange heat with the air that circulates the combustion heat of the burner, and the opening through which the air passes has a narrow structure. Therefore, dust accumulates over time on the suction side of the orthogonal heat exchanger. Then, the amount of air passing through the orthogonal heat exchanger decreases, and the temperature of the hot air introduced into the drying container from the high-temperature air duct rises, which may lead to burnt garbage or ignition.
[0008]
In addition, since the flow of air passing through the orthogonal heat exchanger is higher on the deodorization catalyst side than on the exhaust path side, the deodorization is performed when dust is accumulated and the amount of air passing through the orthogonal heat exchanger is small. Since the hot air temperature on the catalyst side is locally high, there is a further problem that the possibility of scorching or igniting garbage becomes high.
[0009]
In addition, in order to efficiently dry garbage, it is necessary to increase the amount of air circulated through the internal air circulation path as much as possible, and the temperature of the deodorization catalyst is increased so as to maintain the activation of the deodorization catalyst. Therefore, it is necessary to minimize the amount of air sucked by the odorous air sucking means. Therefore, the internal pressure of the internal air circulation path is larger than the internal pressure of the exhaust path.
[0010]
In such a structure in which the internal pressure of the internal air circulation path and the exhaust path is different, for example, there are fine holes in the orthogonal heat exchanger, or due to variations in packing etc. when assembling the orthogonal heat exchanger in the garbage treatment machine When the sealing performance is poor, the air in the internal air circulation path may leak into the exhaust path with a small internal pressure when passing through the orthogonal heat exchanger. Therefore, the air that passes through the exhaust path is air that has not been brominated by passing through the deodorizing catalyst, but this air contains air that contains odor components that have not been deodorized, and is used by the mixed odor components. There was a problem of adversely affecting the people and the surrounding environment.
[0011]
The present invention is for solving the above-mentioned problems, and since the temperature of the hot air introduced into the drying container can be made uniform, it is possible to make the dry state uniform by preventing the burning and burning of the garbage, and the garbage processing machine. An object of the present invention is to provide a garbage disposal machine capable of preventing leakage of odor components from the inside.
[0012]
[Means for Solving the Problems]
The invention according to claim 1 includes a drying container for drying garbage, a burner section for burning fuel to generate combustion heat, a deodorization catalyst provided downstream of the burner section, and air in the drying container. An internal air circulation path that is circulated by an air circulation means; an orthogonal heat exchanger that communicates one passage with the deodorization catalyst and communicates the other passage with the internal air circulation path; and combustion heat of the burner section The deodorizing catalyst is heated to deodorize the odorous air from the drying container, and the air in the drying container is circulated while being heated and heated by the orthogonal heat exchanger via the internal air circulation path. In the garbage processing machine for drying the garbage, an internal air circulation bypass path for circulating the air in the drying container by bypassing the orthogonal heat exchanger is provided. .
[0013]
Further, the invention according to claim 2 is a drying container for drying garbage, odor air suction means for sucking odor air from the drying container, a burner for combusting liquid fuel to generate combustion heat, An odor air combustion chamber that is provided downstream and thermally decomposes the odor air sucked from the drying container by the odor suction means with a combustion flame of the burner, a deodorization catalyst provided downstream of the odor air combustion chamber, and the deodorization catalyst An exhaust path for discharging the air passing through the outside, a circulation duct communicating with the drying container via a circulation fan, and a hot air outlet duct for blowing air heated by the combustion heat of the burner into the drying container. An internal air circulation path, an orthogonal heat exchanger that communicates one passage with the exhaust passage and the deodorization catalyst, and communicates the other passage with the internal air circulation path, and The odor air sucked from the inside by the odor air suction means is deodorized by the odor air combustion chamber and the deodorization catalyst, and the air in the drying container is passed through the internal air circulation path to the orthogonal heat exchanger. In the garbage processing machine that circulates while raising the temperature by heating in the garbage processing machine, the orthogonal heat exchanger is bypassed between the circulation duct and the hot air outlet duct to air in the drying container It is a garbage processing machine provided with the internal air circulation bypass path which circulates.
[0014]
That is, according to the first and second aspects of the invention, the internal air circulation path from the circulation duct through the orthogonal heat exchanger to the hot air outlet duct, and the hot air blowing from the circulation duct without passing through the orthogonal heat exchanger. Since the internal air circulation bypass path leading to the outlet duct has two paths, the orthogonal heat exchanger is blocked by dust and the amount of air passing through the orthogonal heat exchanger decreases and the temperature of this air rises. Since the amount of air passing through the internal air circulation bypass path is increased by that amount and mixed in the hot air outlet duct and introduced into the drying container, the temperature of the hot air can be made uniform, thus preventing burning of the garbage and ignition. This makes it possible to make the garbage dry.
[0015]
The invention described in claim 3 is characterized in that, in the hot air outlet duct, the amount of air introduced from the internal air circulation bypass path is introduced more on the high temperature side than on the low temperature side of the orthogonal heat exchanger. It is a garbage disposal machine described.
[0016]
That is, in the invention described in claim 3, in the hot air outlet duct, the amount of air from the internal air circulation bypass path is increased on the high temperature side of the orthogonal heat exchanger, and the amount of air is decreased on the low temperature side. Therefore, since the temperature of the hot air introduced into the drying container can be made uniform, it is possible to prevent the kitchen garbage from being burnt and ignited, and to make the kitchen garbage dry.
[0017]
According to a fourth aspect of the present invention, there is provided the garbage processing machine according to any one of the second to third aspects, wherein the internal pressure of the internal air circulation path is smaller than the internal pressure of the discharge path.
[0018]
That is, in the invention according to claim 4, since the air in the drying container circulates through the internal air circulation path that passes through the orthogonal heat exchanger and the internal air circulation bypass path that does not pass through the orthogonal heat exchanger, Since the internal pressure of the air circulation path is lower than the internal pressure of the exhaust path, it is possible to reliably prevent the air in the internal air circulation path containing odor components from leaking to the exhaust path side when passing through the orthogonal heat exchanger.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0020]
1 is an external perspective view of a garbage disposal machine, FIG. 2 is a side configuration diagram, and FIG. 3 is a front configuration diagram. First, as shown in FIG. 1, reference numeral 1 denotes a main body of the garbage processing machine, and 2 denotes an openable / closable door for putting the garbage into the main body 1. Reference numeral 3 denotes an operation unit for controlling the operation of the garbage processing machine, and a processed product container for storing a container for receiving a dried processed product in the main body 1 below the operation unit 3. A storage unit 4 is provided.
[0021]
Next, from FIG. 2, 5 is a drying container stored in the main body 1 for drying the garbage, 6 is a burner section for generating combustion heat necessary for drying the garbage, and 7 is discharged from the drying container 5. This is an odor air combustion chamber in which the odor component to be heated is decomposed by the combustion flame of the burner section 6. Reference numeral 8 denotes a deodorization catalyst that is activated by the combustion heat of the burner unit 6 to oxidatively decompose odor components. An orthogonal heat exchanger 9 is disposed downstream of the deodorization catalyst 8, and an exhaust path 11 having an exhaust cylinder 10 downstream thereof. Is communicated.
[0022]
Further, as shown in FIG. 3, a stirring means 12 for stirring the garbage is provided in the vicinity of the bottom of the drying container 5, and a stirring driving means 13 for driving the stirring means 12 is provided outside. Reference numeral 14 denotes a discharge port for discharging the garbage processed waste, and reference numeral 15 denotes a processed product container for storing the dried processed product from the discharge port 14. Reference numeral 16 denotes a discharge port opening / closing means for opening and closing the discharge port 14, and the discharge port 14 is opened and closed by a motor.
[0023]
Further, in the upper part of the drying container 5, an odor air suction port 18, which is provided with an odor air suction fan 17 as an odor air suction means for sucking odor air from the drying container 5 and sending it to the odor air combustion chamber 7. The odorous air inlet 18 and the odorous air combustion chamber 7 communicate with each other via an odorous air duct 19. That is, the odorous air from the drying container 5 is thermally decomposed in the odorous air combustion chamber 7 and then completely deodorized through the deodorizing catalyst 8, passes through the orthogonal heat exchanger 9, and has the exhaust cylinder 10. It is set as the structure discharged | emitted outside from the path | route 11 as odorless air.
[0024]
Further, as shown in FIG. 3, a circulation fan 21 as an internal air circulation means is disposed outside the circulation air suction port 20, and the circulation air suction port 20 and the circulation duct 22 are communicated with each other via the circulation fan 21. The duct 22 communicates with a box body 23 provided so as to form a gap serving as an air passage around the deodorizing catalyst 8 and the orthogonal heat exchanger 9. Reference numeral 24 denotes a hot air outlet duct for introducing hot air into the drying container 5. Reference numeral 25 denotes an internal air circulation bypass port provided in the box body 23.
[0025]
That is, as shown in FIGS. 4 and 5, the internal air circulation path 26 (solid arrow) configured by the circulation duct 22, the orthogonal heat exchanger 9, and the hot air outlet duct 24 does not pass through the orthogonal heat exchanger 9. The internal air circulation bypass passage 25 passes through the internal air circulation bypass port 25 to reach the hot air outlet duct 24, and the internal air circulation bypass route 27 (broken arrow) has two circulation paths. The air from the circulation duct 22 passes through the orthogonal heat exchanger 9 The air that has passed through the air and becomes high-temperature air due to the combustion heat of the burner unit 6 and the air that has passed through the internal air circulation bypass port 25 without passing through the orthogonal heat exchanger 9 are mixed in the hot air outlet duct 24 and dried. 5 is introduced.
[0026]
Further, as shown in FIG. 6, the air that has passed through the internal air circulation bypass port 25 flows more into the high temperature side than the low temperature side of the orthogonal heat exchanger 9 when mixing with the high temperature air from the orthogonal heat exchanger 9. In this way, it is controlled by the partition plate 28. Although the partition plate 28 of the present embodiment has a shape in which the notch on the high temperature side is increased, the point is that a large amount of air can flow into the high temperature side, and is not limited to the shape of the present embodiment.
[0027]
As shown in FIG. 7, the burner unit 6 includes a combustion fan 29, a burner 30, and a carburetor 31 that ejects fuel vaporized gas to the burner 30. Further, downstream of the burner 30, a secondary air ejection plate 33 in which a large number of secondary air holes 32 for ejecting secondary air are provided so as to be opposed to both sides of the crater 34, and the odorous air combustion chamber 7 is odorous. A double structure having an outer peripheral passage communicating with the air duct 19 is formed on the outside, and the inside and outside communicate with each other via a scented air injection hole 35 formed in a large number on the opposing wall surface.
[0028]
Next, the operation in the above configuration will be described. When the door 2 of the main body 1 is opened and the garbage is put into the drying container 5 and the operation unit 3 is operated, the combustion preparation such as preheating the vaporizer 31 is started. When preheating is completed, an oil supply pump (not shown) is started, kerosene flows into the vaporizer 31, and the vaporized gas that has been heated and vaporized is ejected to the burner 30. On the other hand, the combustion fan 29 also starts to rotate at a low speed, and the primary air flows into the burner 30.
[0029]
Therefore, the premixed gas of vaporized gas and primary air is ejected from the crater 34, ignited by an ignition device (not shown), and combustion starts. Further, secondary air is forcibly supplied from the secondary air ejection plate 33 to the combustion flame, and complete combustion is performed. And the combustion heat of this combustion exhaust gas heats the odor air combustion chamber 7, the deodorization catalyst 8, and the orthogonal heat exchanger 9, and then is exhausted to the outside from the exhaust cylinder 10.
[0030]
Also, the stirring means 12 is rotated by the stirring driving means 13 before and after the start of combustion, and the garbage is crushed and stirred to increase the surface area, thereby increasing the drying efficiency. Further, at the time of agitation / pulverization, the agitation drive means 13 rotates in the forward and reverse directions so that the garbage is not displaced in the drying container 5.
[0031]
Further, when the circulation fan 21 is started almost simultaneously with the start of combustion, the air in the drying container 5 flows into the circulation duct 22 from the circulation air suction port 20 and is sent to the box body 23, as indicated by the arrows in FIGS. As described above, most of the air flows into the orthogonal heat exchanger 9 through the gap in the box body 23, and also flows into the warm air outlet duct 24 from the internal air circulation bypass port 25. Here, the air passing through the orthogonal heat exchanger 9 exchanges heat with the combustion heat of the burner section 6, but becomes hot air having a high temperature on the deodorizing catalyst 8 side, and hot air having a lower temperature on the exhaust tube 10 side than the deodorizing catalyst 8 side. Therefore, the warm air temperature of the air that has passed through the orthogonal heat exchanger 9 becomes non-uniform.
[0032]
However, since the air flowing in from the internal air circulation bypass port 25 does not pass through the orthogonal heat exchanger 9, the hot air temperature does not become non-uniform, and further, the partition plate 28 of the hot air outlet duct 24 causes the orthogonal heat exchanger 9 to Because it is mixed with a lot of high-temperature air from the high-temperature side, the temperature of the hot air flowing into the drying container 5 from the hot-air outlet duct 24 can be made uniform, and the surface area can be increased by eliminating the burning of the garbage and crushing and stirring. The dried garbage can be efficiently dried, so that the dried state can be made uniform.
[0033]
Depending on the type of garbage to be thrown in, when drying progresses, part of the garbage becomes dust, and when this dust accumulates on the suction side of the orthogonal heat exchanger 9 over time, the orthogonal heat exchanger 9 is The amount of air passing therethrough has decreased, and the temperature of the hot air introduced from the hot air outlet duct 24 into the drying container 5 has risen, which may lead to burning of the garbage and ignition.
[0034]
However, since the internal air circulation bypass path 27 from the internal air circulation bypass port 25 to the hot air outlet duct 24 is provided without passing through the orthogonal heat exchanger 9 from the circulation duct 22, air passing through the orthogonal heat exchanger 9 is provided. Even if the amount decreases, the amount of air passing through the internal air circulation bypass path 27 increases correspondingly and is mixed with the hot air from the orthogonal heat exchanger 9 in the hot air outlet duct 24, so the hot air outlet duct The temperature rise of the air introduced into the drying container 5 from 24 can be prevented, and the dry state can be made uniform without burning of the garbage. It should be noted that when the hot air temperature passing through the orthogonal heat exchanger 9 is detected and the hot air temperature exceeds a predetermined temperature so that dust of a certain level or more does not accumulate on the orthogonal heat exchanger 9, a garbage disposal machine The operation is stopped.
[0035]
Further, the air circulated through the internal air circulation path 26 and the internal air circulation bypass path 27 communicating with the drying container 5 is odorous air containing a lot of odor components generated from garbage in the drying container 5. The air passing through the exhaust path 11 is odorless air because it is completely deodorized by the odorous air combustion chamber 7 and the deodorizing catalyst 8. When the odorous air and odorless air pass through each path of the orthogonal heat exchanger 9, if the internal pressure of the exhaust path 11 is smaller than the internal pressure of the internal air circulation path 26, for example, the orthogonal heat exchanger 9 has fine holes. If the sealing performance of the orthogonal heat exchanger 9 is poor, the odorous air in the internal air circulation path 26 leaks into the exhaust path 11 having a low internal pressure.
[0036]
However, since the internal air circulation bypass path 27 is provided in the internal air circulation path 26, the internal pressure of the internal air circulation path 26 is smaller than the internal pressure of the exhaust path 11, so there are fine holes in the orthogonal heat exchanger 9. Even if the sealing performance is poor, odorous air does not leak into the exhaust path 11, and only odorless air leaks from the exhaust path 11 to the internal air circulation path 26. Therefore, the odor component does not leak to the outside of the main body 1 of the garbage disposal machine through the exhaust path 11, and it is possible to prevent the odor component from adversely affecting the user and the surrounding environment.
[0037]
On the other hand, since the odorous air inside the drying container 5 is ejected from the odorous air intake port 18 through the odorous air duct 19 to the odorous air combustion chamber 7 by the odorous air suction fan 17, 6, and the odor component remaining without being thermally decomposed in the odor air combustion chamber 7 flows into the deodorization catalyst 8 downstream of the odor air combustion chamber 7 and is completely oxidized and decomposed. .
[0038]
As the garbage is dried as described above and the moisture in the drying container 5 is reduced, the temperature gradually rises from the upper part of the drying container 5. And if the temperature sensor provided in the drying container 5 detects predetermined temperature, it will judge that drying of garbage has been completed, the combustion thermal power of the burner 30 will be lowered | hung, and after operating for a predetermined time, the burner 30 will be extinguished. Thereafter, the circulation fan 21, the odorous air suction fan 17 and the stirring means 12 are operated for a predetermined time to cool the drying container 5 and the dried product and complete the drying process of the garbage.
[0039]
When the drying process is completed, the motor of the discharge port opening / closing means 16 is actuated to open the discharge port 14 provided in the drying container 5, and the stirring means 12 is rotated in a fixed direction by the stirring drive means 13 to dry the garbage. The material is discharged from the discharge port 14 to the processed material container 15.
[0040]
【The invention's effect】
As described above, according to the first and second aspects of the present invention, the internal air circulation path from the circulation duct through the orthogonal heat exchanger to the hot air outlet duct, and the orthogonal from the circulation duct Since the internal air circulation bypass path that leads to the hot air outlet duct without passing through the heat exchanger is used, the orthogonal heat exchanger is blocked by dust and the amount of air passing through the orthogonal heat exchanger is reduced. When the temperature of the air rises, the amount of air passing through the internal air circulation bypass path is increased by that amount and mixed in the hot air outlet duct and introduced into the drying container. The dry state of garbage can be made uniform by preventing garbage from burning and igniting.
[0041]
According to the third aspect of the present invention, in the hot air outlet duct, the amount of air from the internal air circulation bypass path is increased on the high temperature side of the orthogonal heat exchanger, and the air is Since the amount is reduced, the temperature of the hot air introduced into the drying container can be made uniform, so that the garbage can be kept in a dry state by preventing scorching and ignition of the garbage.
[0042]
According to the invention described in claim 4 of the present invention, the air in the drying container circulates through an internal air circulation path that passes through the orthogonal heat exchanger and an internal air circulation bypass path that does not pass through the orthogonal heat exchanger; As a result, the internal pressure of the internal air circulation path is lower than the internal pressure of the exhaust path, so that it is ensured that the air in the internal air circulation path containing odor components leaks to the exhaust path side when passing through the orthogonal heat exchanger. Therefore, it is possible to prevent the odor component from adversely affecting the user and the surrounding environment.
[Brief description of the drawings]
FIG. 1 is an external perspective view of a garbage disposal machine according to an embodiment of the present invention.
FIG. 2 is a side view of a garbage disposal apparatus showing an embodiment of the present invention.
FIG. 3 is a front configuration diagram of a garbage disposal machine showing an embodiment of the present invention.
FIG. 4 is an enlarged inclined view of the orthogonal heat exchanger and the box of the embodiment of the present invention.
FIG. 5 is a side configuration diagram of an orthogonal heat exchanger, a box, and a hot air outlet duct according to an embodiment of the present invention.
FIG. 6 is a perspective view of a hot air outlet duct according to an embodiment of the present invention.
FIG. 7 is a configuration diagram of a burner unit and an odorous air combustion chamber according to an embodiment of the present invention.
FIG. 8 is a side view of a garbage disposal apparatus showing a conventional embodiment.
[Explanation of symbols]
5 Drying container 6 Burner section 7 Odor air combustion chamber 8 Deodorization catalyst 9 Orthogonal heat exchanger 11 Exhaust path 17 Odor air suction fan (odor air suction means)
21 Circulation fan (internal air circulation means)
22 Circulating duct 24 Hot air outlet duct 26 Internal air circulation path 27 Internal air circulation bypass path 30 Burner

Claims (4)

A drying container for drying garbage, a burner section for burning fuel to generate combustion heat, a deodorizing catalyst provided downstream of the burner section, and an internal air for circulating air in the drying container by an internal air circulation means A circulation path and an orthogonal heat exchanger that communicates one passage to the deodorization catalyst and communicates the other passage to the internal air circulation path, and heats the deodorization catalyst with combustion heat of the burner section. The odor air from the drying container is deodorized, and the garbage in the drying container is circulated while being heated and heated by the orthogonal heat exchanger through the internal air circulation path. A garbage disposal apparatus, comprising an internal air circulation bypass path for bypassing the orthogonal heat exchanger and circulating the air in the drying container. A drying container for drying garbage, odor air suction means for sucking odor air from the drying container, a burner for burning liquid fuel to generate combustion heat, and the drying by the odor suction means provided downstream of the burner An odor air combustion chamber for thermally decomposing odor air sucked from a container with a combustion flame of the burner, a deodorization catalyst provided downstream of the odor air combustion chamber, and an exhaust for exhausting air that has passed through the deodorization catalyst to the outside An internal air circulation path having a path, a circulation duct communicating with the drying container via a circulation fan, and a hot air outlet duct for blowing air heated by the combustion heat of the burner into the drying container; The odorous air suction means has an orthogonal heat exchanger that communicates with the exhaust path and the deodorization catalyst and communicates the other path with the internal air circulation path. While the odor air sucked more is deodorized by the odor air combustion chamber and the deodorization catalyst, while the air in the drying container is heated and heated by the orthogonal heat exchanger via the internal air circulation path An internal air circulation bypass for bypassing the orthogonal heat exchanger between the circulation duct and the hot air outlet duct to circulate the air in the drying container in a garbage processing machine for drying and processing the garbage Garbage disposal machine characterized by having a route. The garbage processing according to claim 2, wherein in the hot air outlet duct, an amount of air introduced from the internal air circulation bypass path is introduced more to a high temperature side than a low temperature side of the orthogonal heat exchanger. Machine. 4. The garbage processing machine according to claim 2, wherein an internal pressure of the internal air circulation path is smaller than an internal pressure of the discharge path.

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