JPH06257940A - Vacuum drying and processing device - Google Patents

Abstract

PURPOSE:To separate a drying boiler and a heat pump and facilitate their maintenance by a method wherein each of steam transporting pipe, discharging pipe and a hot water circulating passage pipe communicating between a plurality of composing elements at a main body of a device can be connected in such a manner that they can be separated from each other. CONSTITUTION:A three-way changing-over valve 8 of a device, for example, in the case that a refrigerating operation is carried out in the device is operated and a discharging pipe 5 is communicated with a cold air feeding pipe 10. Under this condition, a vacuum pump 4 is operated under an atmospheric pressure, an air-cooled heat pump (c) is operated. Then, air within a main body 1 at a drying boiler (a) is circulated through a steam transporting pipe 3 and an air feeding pipe 10 and when the air is passed through a condenser (b), it is heat exchanged with cold heat at the downstream side of a capillary tube 11, so that the main body 1 of the drying boiler and raw rubbish within the boiler are cooled, respectively. With such an arrangement as above, each of the steam transporting pipe 3, the discharging pipe 5 and returning passages 17a and 17b of the hot water circulation pipe 17 is connected to a plurality of devices A and B in the midway in such a manner that they can be separated from each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum drying treatment apparatus used for drying garbage and the like, and more particularly to a vacuum drying treatment apparatus having a refrigerating function.

[0002]

2. Description of the Related Art A vacuum drying apparatus for raw garbage or the like is generally used to dry the raw garbage collected in the daytime from the evening to the night. The three days may be collectively dried. Therefore, the garbage put in the drying kettle is left as it is until it is processed, and when the outside temperature is high such as in summer, it will be decomposed by the time it is processed. The odor will be dissipated outside the device. Therefore, the inventors of the present application previously provided a drying treatment apparatus with a refrigerating function so that the garbage etc. put in a drying pot can be kept from decaying until the drying treatment. Was developed and filed. (Japanese Patent Application No. 3-28
(See No. 5042)

[0003]

However, in the vacuum drying processing apparatus applied for the above-mentioned application, the vacuum drying pot and the heat pump are integrally formed, and the heat pump part cannot be separated. Therefore, the following problems occur in maintenance. There is. (1) If repairing at the installation site, specialized technicians must be nationwide. (2) Since it is not allowed to release CFCs into the atmosphere during repairs, CFC recovery equipment must be prepared nationwide. (3) If the entire device is sent to the factory for repair, a great deal of cost will be required for packaging and transportation. The present invention has been made in view of the above problems, and an object of the present invention is to provide a vacuum drying apparatus having a refrigerating function and easily maintaining a heat pump.

[0004]

In order to achieve the above object, in the vacuum drying apparatus of the present invention, a drying vessel equipped with a hot water jacket integrally with a main body of a closed container for storing food waste, an air-cooled heat pump, , A water-cooled heat pump, a condenser that incorporates the downstream side of the capillary tubes of both heat pumps inside, a steam transport pipe that connects the main body of the drying pot to the condenser, and an exhaust pipe that is taken out from the condenser, A vacuum pump installed in the exhaust pipe, a cold air inlet pipe branching from the exhaust pipe via a three-way switching valve on the downstream side of the vacuum pump to connect to the main body of the drying pot, a hot water jacket of the drying pot, and a water-cooling heat pump A hot water circulation pipe communicating with the radiator of the above, and a hot water circulation pump provided in the hot water circulation pipe, and the water vapor transport pipe, the exhaust pipe, and the hot water circulation pipe Return path is to disconnect connected in each of the middle.

[0005]

In the vacuum drying treatment apparatus configured as described above, the drying tank and the heat pump are directly connected to each other by disconnecting the connecting portions of the water vapor transport pipe, the exhaust pipe, and the hot water circulating pipe from the forward and return paths. The part that is being cut off is separated.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. This apparatus is mainly composed of a first unit A in which a drying pot a is provided, and a second unit B in which a condenser b, an air-cooling heat pump c, and a water-cooling heat pump d are mainly provided.

The drying pot a is composed of a main body 1 having a pressure-tight container-like shape for accommodating food waste and the like, and a hot water jacket 2 integrally provided at the bottom of the main pot 1. From the main body 1, a steam transport pipe 3 is provided. Is taken out and the tube 3 communicates with the condenser b.

On the other hand, from the top of the condenser b, the vacuum pump 4
And a drain pipe 7 having a drain pump 6 are taken out from the bottom, respectively, and the exhaust pipe 5 is opened to the atmosphere via a three-way switching valve 8 on the downstream side of the vacuum pump 4. It branches into a cold air inlet pipe 10 that connects the exhaust port 9 and the main body 1 of the drying pot a.

The water vapor transport pipe 3 and the exhaust pipe 5 are detachably connected to the first unit A side and the second unit B side, respectively, and the vacuum pump 4 is connected to the exhaust pipe 5a on the first unit A side. And a three-way switching valve 8 are provided.

Further, in order to cool the condenser b by utilizing the cold heat generated by the heat pump, the air-cooling type heat pump c and the water-cooling type heat pump d are partially inserted at the downstream side from the capillary tube 11. The heat absorbing fins 12 are formed at the respective insertion portions.

The air-cooling type heat pump c and the water-cooling type heat pump d have a compressor 13 and a capillary tube 11 which are provided in a closed circulation line in which chlorofluorocarbon is sealed as a refrigerant. The resistance causes a high pressure in the pipeline between the compressor 13 and the capillary tube 11 in the refrigerant flow direction, causing condensation of the refrigerant and an increase in temperature. Meanwhile, the capillary tube 11 and the compressor 13
It has a conventionally well-known structural form in which the pressure becomes low in the pipe line between and and the refrigerant evaporates, and the temperature drops, and between the compressor 13 and the capillary tube 11 on the downstream side of the compressor 13, air cooling is performed. The heat pump c is equipped with a radiator 14 for air cooling, and the heat pump d for water cooling is equipped with a radiator 15 for water cooling.

The radiator 15 of the water-cooled heat pump d and the warm water jacket 2 of the drying pot a are connected by a warm water circulation pipe line 17 having a warm water circulation pump 16.

The warm water circulation line 17 includes a forward side 17a and a return side 17b.
Both of them are detachably connected to the first unit A side and the second unit B side on the way.
Is provided on the outward path 17a-1 on the first unit side. A pressure adjusting tank 18 is also provided on the forward side 17a-1 of the first unit side on the upstream side of the hot water circulation pump 16. Also, the first
A preheating hot water circulation passage 21 including a hot water circulation pump 19 and a preheating water heater 20 is further branched from the return passage 17b-1 on the unit side.

Reference numeral 22 denotes an input port for inputting raw garbage or the like into the main body of the drying pot, and reference numeral 23 denotes an outlet for taking out the dried raw garbage, each of which is sealed by an openable / closable lid. Further, 24 is a stirrer, and 25 and 26 are check valves, respectively.

In order to carry out the refrigerating operation of such a vacuum drying treatment apparatus, the three-way switching valve 8 is operated as shown in FIG. Pump 4
Is operated at atmospheric pressure and the air-cooling heat pump c is operated.

As a result, the air in the drying cauldron body 1 circulates and circulates through the circulation path constituted by connecting the steam boil pipe 3 and the cold air inlet pipe 10 to the main body 1 of the drying cauldron a and the condenser b. Then
When the circulating and flowing air passes through the condenser b and is cooled by exchanging heat with the cold heat generated on the downstream side of the capillary tube 11 of the heat pump c, the drying pot main body 1 is cooled.

Therefore, if the garbage etc. is stored in the drying pot main body 1, the garbage etc. will be in a refrigerated state. The heat generated on the upstream side of the capillary tube 11 of the heat pump c is dissipated into the atmosphere by the radiator 14.

Further, in the drying operation, as shown in FIG. 2, the three-way switching valve 8 is operated to connect the exhaust pipe 5 to the exhaust port 9, and the vacuum pump 4 of the exhaust pipe 5 and the hot water circulation pipe line 17 are connected. The hot water circulation pump 16 of the above is operated, and at the same time, the air-cooled heat pump c
And both the water-cooled heat pump d are operated.

As a result, the air in the drying pot main body 1 is sucked and degassed via the condenser b, and the inside of the main body 1 is depressurized.
Further, water is circulated and circulated between the warm water jacket 2 of the drying pot a and the radiator 15 of the water-cooling heat pump d via the warm water circulation pipe line 17, and the circulated fluid flows in the radiator 15 to the water-cooling heat pump d. Capillary tube
11 The water temperature in the hot water jacket 2 rises because it is heated by heat exchange with the heat generated on the upstream side.

Therefore, if raw garbage or the like is put in and housed in the drying pot main body 1, the raw garbage or the like is warmed by the heating energy of the warm water in the warm water jacket 2 to evaporate the water content. The steam inside the main body 1 flows into the water vapor transport pipe 3 having a low pressure in combination with the suction force of the vacuum pump 4 and flows into the condenser b, and in the condenser b, the capillary of the water-cooled heat pump d is mainly used. Tube 11
It is heat-exchanged with cold heat generated on the downstream side, cooled, condensed, and returned to water. That is, the evaporation in the drying pot main body 1 is caused by the condenser 2
Condensation occurs continuously inside and the garbage is dried.

At this time, the air-cooling type heat pump c has a surplus amount of heat for the cooling heat of the compressor 13 of the water-cooling type heat pump d, so that it mainly serves to dissipate the surplus heat into the atmosphere. The condensed water collects in the condenser b and is drained from the drain pipe 7 by the operation of the drain pump 6.

The hot water circulation pump 19 and the preheating water heater 20 provided in the preheating hot water circulation passage 17 are operated at the start of the drying operation in which the water in the warm water circulation pipe passage 17 has not been warmed yet. The water in the circulation pipe 21 is heated, and the operation is stopped after the water is warmed.

[0023]

[Effect] Since the present invention is configured as described above, the following effects can be obtained. (1). Since the drying pot and the parts directly connected to the heat pump can be separated, only the side with the built-in heat pump can be sent to the factory for repair during maintenance, and specialist engineers can be nationwide. There is no need to arrange or prepare CFC recovery equipment nationwide. (2). If a spare of the device containing the heat pump is prepared, the device can be used even during the repair period by exchanging the spare device for repair. (3). By equipping the drying pot with pumps such as a vacuum pump, the side incorporating the heat pump can be made into a relatively small unit, so that it is easy to separate the unit for factory maintenance and to send it to the factory.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a vacuum drying apparatus showing an embodiment of the present invention, showing a state during refrigerating operation.

FIG. 2 is a schematic configuration diagram showing a state during a drying operation.

[Explanation of symbols]

a: Drying pot b: Condenser c: Air-cooled heat pump d: Water-cooled heat pump 1: Drying pot body 2: Hot water jacket 3: Water vapor transport pipe 4: Vacuum pump 5: Exhaust pipe 8: Three-way switching valve 10: Cold air feeding Inlet pipe 11: Capillary tube 15: Radiator 16: Hot water circulation pump 17: Hot water circulation pipe

Continuation of the front page (72) Inventor Naohatsu Hirose 2-26 Fukuzumicho, Nakagawa-ku, Nagoya, Aichi Rinnai Co., Ltd.

Claims (1)

[Claims] 1. A drying pot equipped with a hot water jacket integrally with a main body of a closed container for storing food waste, an air-cooling heat pump, a water-cooling heat pump, and a wake side taken in from the capillary tubes of both heat pumps inside. A condenser, a steam transport pipe that connects the main body of the drying pot to the condenser, an exhaust pipe taken out from the condenser, a vacuum pump provided in the exhaust pipe, and a three-way switching valve on the downstream side of the vacuum pump. A cold air inlet pipe branching from the exhaust pipe via the exhaust pipe to connect to the main body of the drying pot, a hot water circulating pipe connecting the hot water jacket of the drying pot and the radiator of the water cooling type heat pump, and a hot water circulating pipe. A hot water circulation pump, wherein the water vapor transport pipe, the exhaust pipe, and the forward and return paths of the hot water circulation pipe are connected so that they can be separated in the middle. Drying apparatus.