JPH05268825A - Air-conditioning treating facilities - Google Patents

Abstract

PURPOSE:To obtain air-conditioning treating facilities having a small dead space and a simple structure, capable of reversing a ventilation direction to a storage chamber while keeping a ventilation direction of air passing through heat exchangers constant. CONSTITUTION:In air-conditioning treating facilities wherein a blast fan 6 capable of reversing a ventilation direction is set in an air circulation path R ventilating a storage chamber 2 for preserving targets to be dried or preserved and an air-conditioning means 4 of heat pump type for regulating air is laid in the circulation path R, a cylindrical case 4f having both open ends is installed in an attitude to cross the circulation path R and heat exchangers 4a and 4b for regulating air of the air-conditioning means 4 and a fan 4c for ventilating the heat exchangers are arranged in a direction to cross the circulation path R in the cylindrical case 4f.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided with a blower fan capable of reversing the ventilation direction in a circulation path of air for ventilating a storage chamber for storing an object to be dried or stored. The present invention relates to an air-conditioning type processing facility provided with a heat pump type air-conditioning unit for adjusting the temperature.

[0002]

2. Description of the Related Art Such an air conditioning type processing facility is a facility for drying and storing objects such as grains and vegetables. The air adjusted by the cooling / dehumidifying operation or the heating operation of the heat pump type air conditioning means is ventilated into the storage chamber by the blower fan.

By the way, it is desirable to reverse the ventilation direction to the storage chamber so that the dry state or storage state of the object is as uniform as possible regardless of the position in the storage chamber. However, in general, the ventilation direction of the air passing through the heat exchanger for air conditioning of the air conditioning means must be a constant direction, so even if the ventilation direction of the blower fan is reversed, the ventilation of the air passing through the heat exchanger will be reversed. It is necessary to cover the structure of the ventilation duct so that the direction does not change. As a conventional example thereof, there is a cooling device described in Japanese Patent Publication No. 1-60757. In this cooling device, four dampers are paired in pairs of two to control opening and closing, so that a pair of left and right blower ducts are alternately switched, and left and right air outlets to a cooling chamber (corresponding to a storage chamber), etc. Is being switched.

That is, as shown in FIG. 6, the air that has passed upward through the cooler 15 has a pair of left and right air ducts 16, 1.
The air is blown into the cooling chamber 18 from one of the left and right air outlets through one of 7 and is exhausted from the upper portion on the opposite side and returns to the cooler 15. This circulating air is the left and right blower ducts 1
Which of the six dampers, 17, passes through the four dampers 19,2.
Switching is performed by opening / closing operations of 0, 21, and 22, so that the ventilation direction in the cooling chamber 18 is reversed. For example, when the dampers 19 and 22 are closed and the dampers 20 and 21 are opened, the ventilation direction is as shown by the solid line.

[0005]

However, in the above-mentioned conventional example, it is necessary to provide four dampers, so that the structure becomes complicated. Also, since only one of the pair of left and right air ducts is used at any one time, the so-called dead space becomes large, and the ratio of the effective volume of the cooling chamber (storage chamber) to the external dimensions of the device (equipment) becomes small.

The present invention has been made in view of the above circumstances, and an object thereof is to keep the ventilation direction of the air passing through the heat exchanger constant while having a dead space as small as possible and a simple structure. The purpose is to be able to reverse the ventilation direction to the storage chamber.

[0007]

In the air-conditioning type processing equipment of the present invention, a blower fan is provided in a circulation path of air for ventilating a storage chamber for storing an object to be dried or stored. A heat pump type air conditioner for adjusting air is provided, and the characteristic configuration thereof is that the blower fan is configured to be capable of reversing the ventilation direction, and a cylindrical case with both ends opened in the circulation path. A heat exchanger for air conditioning of the air conditioner, and a fan that ventilates the heat exchanger, which are arranged so as to cross the circulation path, are provided side by side in the tubular case in a direction crossing the circulation path. There is a point.

[0008]

According to the above characteristic structure, even if the ventilation direction of the blower fan is reversed, the ventilation direction in the cylindrical case is a fixed direction determined by the rotation direction of the fan provided in the cylindrical case. A part of the air that is blown into the storage chamber through the circulation path by the blower fan is ventilated in a fixed direction that crosses the circulation path inside the cylindrical case that is arranged in a posture that crosses the circulation path, and the heat exchanger After passing, constant air conditioning such as dehumidification is performed. Therefore, no extra ventilation passage or duct for reversing the ventilation direction to the storage chamber is required.

The air that has passed through the heat exchanger and has been air-conditioned is mixed with the air that has not passed through the heat exchanger and ventilated into the storage chamber. For example, when the heat exchanger is an evaporator and air is cooled and dehumidified, the temperature does not drop to the dew point when a large amount of air passes through the heat exchanger even though the cooling capacity of the heat exchanger is small. However, according to the above structure, a part of the circulating air passes through the heat exchanger at a constant wind speed determined by the fan in the cylindrical case, so that such a phenomenon does not occur.

[0010]

Therefore, it is possible to reverse the ventilation direction to the storage chamber while keeping the ventilation direction of the air passing through the heat exchanger constant with a simple structure having a small dead space.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment in which the present invention is applied to a facility for drying and storing crops such as vegetables as an air conditioning type treatment facility will be described below with reference to the drawings. As shown in FIG. 1, an inner chamber 2 is provided inside an outer chamber structure 1 of a drying / storage facility. Interior room 2
Corresponds to a storage room for storing an object (crop) to be dried or stored, and stores the shelves 2a and 2b on which the crop is placed.
An upper air passage 3a, a left air passage 3b, and a right air passage 3c are formed between the outer chamber structure 1 and the inner chamber 2, and the left air passage 3b or the right air passage 3c is formed on the left and right side surfaces of the inner chamber 2. An opening that communicates with is provided.

An air conditioning room 5 having a heat pump type air conditioning means (hereinafter referred to as an air conditioning unit) 4 is connected to the left side of the outer chamber structure 1. The air-conditioning chamber 5 is connected to the upper ventilation passage 3a through the upper opening 5a and is connected to the left ventilation passage 3b through the lower opening 5b. Therefore, the vertical air passages (air-conditioning room air passages) 5c of the air-conditioning room 5 and the air passages 3a,
A circulation path R for the air that ventilates the inner chamber 2 is formed by 3b and 3c.

The wind generated by the rotation of the blower fan (hereinafter referred to as the circulation fan) 6 provided in the upper ventilation passage 3a, that is, the circulation passage R, circulates as shown by the arrow in the figure. By changing the rotation direction of the circulation fan 6, it is possible to circulate in the direction opposite to the arrow. Outside the left and right side surfaces of the inner chamber 2, a wind rectifying device 2c is provided so that ventilation from the left ventilation passage 3b or the right ventilation passage 3c to the inner chamber 2 is as uniform as possible in the vertical direction.

Above and below the air conditioning unit 4 in the air conditioning room 5, dampers 5d and 5e for opening and closing the ventilation path 5c of the air conditioning room, and dampers 5f, 5g, 5h and 5 for introducing or exhausting outside air.
i is provided. By combining the open / closed states of these dampers, not only closed circulation ventilation but also ventilation by introducing outside air is possible. Further, as described below, the function of the air conditioning unit 4 makes it possible to heat, cool, and dehumidify the ventilated air.

The air conditioning unit 4 has an indoor evaporator 4a and an indoor condenser 4b as heat exchangers for air adjustment provided inside the air conditioning room 5, that is, in the air conditioning room ventilation passage 5c, and a fan for ventilating these ( Hereinafter, the indoor fan) 4c, an outdoor heat exchanger 4d provided outside the air conditioning room 5, and an outdoor fan 4e. As shown in FIG. 1 and FIG. 2, a cylindrical case 4f having both ends opened in the circulation path R is arranged in a posture of traversing the circulation path R, and the indoor evaporator 4a, the indoor condenser 4b, and the outdoor fan 4e are arranged. They are provided side by side in a direction crossing the circulation path R in the cylindrical case 4f.

A part of the air ventilated by the circulation fan 6 into the inner chamber 2 is partially covered by the indoor fan 4c.
It flows inside in the direction of the arrow and passes through the indoor evaporator 4a and the indoor condenser 4b. For example, after being cooled and dehumidified in the indoor evaporator 4a, it is reheated in the indoor condenser 4b. The rotation direction of the indoor fan 4c is constant, and even if the ventilation direction to the inner chamber 2 (circulation direction) is reversed by the reverse rotation of the circulation fan 6, the ventilation direction inside the cylindrical case 4f does not change.

The indoor evaporator 4a, the indoor condenser 4b, and the outdoor heat exchanger 4d, together with the compressor 7 and the like, constitute a heat pump circuit (refrigeration circuit) as shown in FIG. In the figure, 8 is an accumulator for preventing a liquid refrigerant from flowing into the compressor 7, and 9 and 10 are capillary tubes as a refrigerant expansion mechanism. In addition, the bypass solenoid valves 11 and 1 are attached to the capillary tubes 9 and 10, respectively.
2 are connected in parallel, and when the solenoid valve 11 (12) is opened, the refrigerant does not flow into the capillary tube 9 (10).

Reference numerals 13 and 14 are 3-port 2-position switching valves as shown in FIG. The switching valve 13 switches the refrigerant flow path from the compressor 7 to the indoor condenser 4b or the outdoor heat exchanger 4d, and the switching valve 14 switches the refrigerant flow path to the accumulator 8 to the indoor evaporator 4a or the outdoor heat exchange. Switch to vessel 4d. When the switching valves 13 and 14 are in the positions shown in FIG.
And the refrigerant flows as indicated by the arrow in FIG. That is, the indoor condenser 4b is separated from the refrigerant flow path, and the outdoor heat exchanger 4d functions as a condenser. As a result, a cold air operation is performed in which a part of the air ventilated into the inner chamber 2 is cooled and dehumidified by the indoor evaporator 4a. At this time, the solenoid valve 11 is opened and the solenoid valve 12 is closed.

In FIG. 4, the switching valve 13 is at the left position,
That is, when the compressor 7 is switched to the position where it is connected to the indoor condenser 4b, the outdoor heat exchanger 4d is disconnected from the flow path of the refrigerant, and the refrigerant flows through the indoor condenser 4b and the indoor evaporator 4a. Therefore, a part of the air ventilated in the inner chamber 2 is cooled and dehumidified by the indoor evaporator 4a, and then reheated by the indoor condenser 4b (at room temperature) to perform a dehumidifying operation. At this time, the solenoid valve 12 is closed.

Further, the switching valve 1 is changed from the above dehumidifying operation state.
When 4 is switched to the left side position, that is, the position where the accumulator 8 is connected to the outdoor heat exchanger 4d, the indoor evaporator 4a is disconnected from the refrigerant flow path, and the refrigerant is the indoor condenser 4b and the outdoor heat exchanger 4d. Flowing through. Therefore, the outdoor heat exchanger 4d functions as an evaporator, and warm air operation is performed in which a part of the air ventilated into the inner chamber 2 is heated by the indoor condenser 4b. At this time, the solenoid valve 11 is closed.

Switching valves 13, 1 in the three operation modes (dehumidification, cold air, warm air) of the air conditioning unit 4 as described above.
The switching state of No. 4 and the opening / closing state of the solenoid valves 11 and 12 are shown in a table as shown in FIG. In the figure, the switching valve 1
The states of 3 and 14 are expressed as "indoor" or "outdoor", but "indoor" means a state in which the compressor 7 or the accumulator 8 is connected to the indoor condenser 4b or the indoor evaporator 4a, and "outdoor" is outdoor. It means a state of being connected to the heat exchanger 4d.

Another embodiment will be briefly listed below. In the above-described embodiment, the indoor evaporator 4a and the indoor condenser 4b are provided as heat exchangers for air conditioning, and any one of the three heat exchangers including the outdoor heat exchanger 4d is used as a refrigerant flow. Although the heat pump circuit switches the cold air operation, the hot air operation, and the dehumidifying operation by disconnecting from the passage, it is not limited to this. For example, only one heat exchanger may be provided as a heat exchanger for air conditioning, and the outdoor heat exchanger, the compressor, the four-way valve, etc. may constitute a normal cooling / heating heat pump circuit.

The specific configurations of the storage chamber, the circulation path, and the air conditioning unit are not limited to the configurations of the outer chamber structure 1 and the inner chamber 2 as in the above-described embodiment, and for example, the air conditioning chamber and the storage chamber including the air conditioning unit. Various modifications such as a configuration in which a duct as a circulation path is provided between and are possible.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an outline of an air conditioning type processing facility according to an embodiment of the present invention.

FIG. 2 is a plan sectional view showing an outline of an air conditioning type processing facility.

FIG. 3 is a diagram showing a refrigeration circuit of an air conditioning unit.

FIG. 4 is a schematic diagram for explaining operation mode switching of an air conditioning unit.

FIG. 5 is a table showing operation mode switching of air conditioning means.

FIG. 6 is an explanatory diagram according to a conventional example.

[Explanation of symbols]

 2 Storage Room 4 Air Conditioning Means 4a, 4b Heat Exchanger 4c Fan 4f Cylindrical Case 6 Blower Fan R Circulation Path

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location F25B 29/00 411 E 9252-3L F25D 13/00 101 Z 8511-3L 17/08 301 8511-3L

Claims (1)

[Claims] 1. A blower fan (6) is provided in a circulation path (R) of air for ventilating a storage chamber (2) for storing an object to be dried or stored, and air in the circulation path (R) is provided. A heat-pump air-conditioning unit (4) for adjusting the air-conditioning system, wherein the blower fan (6) is configured to be able to reverse the ventilation direction, and both ends of the circulation path (R) are A cylindrical case (4f) having an opening is arranged in such a manner that it crosses the circulation path (R), and heat exchangers (4a, 4b) for air conditioning of the air conditioning means (4) are ventilated. An air-conditioning treatment facility in which fans (4c) are arranged side by side in the tubular case (4f) in a direction crossing the circulation path (R).