JPH1194340A - Punching duct, composite air conditioner, and air-conditioning system provided therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent any troubles in the next operation by changing the speed of the supply air by an opening/closing structure of a punching duct to circulate the airconditioned air so as to be blown into a space to be air conditioned to achieve the cooling operation in a short time. SOLUTION: The atmospheric condition of a space to be air-conditioned by the air-conditioning operation in the space to be air-conditioned, the dehumidifying operation by the sanitation after the air-conditioning operation is completed, the drying operation after the sanitation, and the subsequent cooling operation before the operation is started, and a composite air conditioner 20 is operated. The air-conditioning atmosphere of 60% in humidity is formed. The draft feeling of a worker is eliminated during the operation by using a same duct, the low-temperature air-conditioning operation is achieved by the low-speed air supply to prevent the germs or microorganisms from lowering or flying high, the dehumidifying, drying and cooling are completed by the high-speed air supply after the operation is completed during the night time when the operation is stopped, and any troubles can be prevented in the next operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to indoor air conditioning with environmental control, and more particularly to a relatively low temperature of 0 to 10.degree.
Elimination of the draft feeling of employees during low-temperature air-conditioning operation, washing of air-conditioned airspace after completion of low-temperature air-conditioning operation, dehumidifying operation by sanitation performed after washing, drying operation after sanitation, and before starting the next operation A punching duct that enables high-speed operation processing for cooling operation, a combined air conditioner that combines a non-filter function for removing dust containing bacteria and microorganisms, a high dehumidification and low-temperature cooling function, and an environmental air It relates to an air conditioning system that can respond to cleanliness.

[0002]

2. Description of the Related Art In a conventional food processing plant, for example, in the case of meat, the storage temperature is specified to be 10 ° C. or lower according to the Food Sanitation Law in order to suppress the growth of microorganisms having a breeding temperature of 25 to 40 ° C. In addition, the air conditioning air in the processing chamber before the heat treatment such as the raw material processing step such as blood squeezing and boning of the raw material, the cutting of the raw material, the minced meat, and the kneading is preferably 10 ° C. or less from the viewpoint of quality control, It is necessary to consider the working environment of workers. In addition, there is a problem that the operator is given a sense of incongruity (draft feeling), and in terms of work efficiency, the incongruity is eliminated.

Therefore, in order to eliminate the draft feeling of the worker, conventionally, an appropriate arrangement position between the position of the air conditioner such as a unit cooler and the position of the worker is taken into consideration, or approximately 0 to 10 is set by using a cloth duct. The blowing speed of low-temperature conditioned air at ℃ has been reduced.

[0004]

However, when the blowing speed is suppressed by using the cloth duct, the dehumidifying operation by the sanitization after the low-temperature air-conditioning operation described later, the drying operation after the sanitation, and the start of the operation before the operation are started. It is difficult to secure a high blowing speed for the cooling operation to be performed.
There is a problem that it takes too much time to remove and dehumidify and dry and cool the air space to be air-conditioned.

In the case of the above-mentioned food processing, it is necessary to clean the processing machine, the floor, etc. after the low-temperature air-conditioning operation is completed, and the floor, etc. is kept wet during the operation due to the nature of the work. In many cases, a wet air-conditioned air space is formed, and an air conditioner having a high dehumidifying capacity is required.

[0006] In the case of food processing, the air in the processing room, which is an air space to be air-conditioned, contains a large amount of eutrophic components and fats and oils scattered during processing. The system incorporates problems in hygiene management due to deterioration of the function of the built-in filter.

Further, it is desired that the air conditioning in the packaging process after heat treatment of smoke, boil and the like be performed by a sterile control system, and the air cleanliness required for those systems is as follows: Class 100,000 or less. A filter is generally used for the sterilization, but in a humid place, there is a problem in that the filter becomes dirty, moldy, and has a complicated management in terms of life.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is possible to eliminate the draft feeling of an operator during a low-temperature air-conditioning operation at a relatively low temperature of 0 to 10.degree. The dehumidifying operation by washing and sanitization, the drying operation after sanitation, and the cooling operation performed before the start of the next operation must be performed at high speed within a short time so that the next operation is not hindered. is there. In addition, during the low-temperature air-conditioning operation, the filter has a high dehumidifying capacity, and has a non-filter function of surely capturing and removing fine particles such as eutrophic components and oils and fats which are scattered every time reflux is performed. The purpose is to provide an air-conditioning system that is completely sterile and can be sterilized.

For that purpose, it is necessary to satisfy at least the following requirements in terms of configuration. 1) In order to eliminate the draft feeling of the worker and to perform high-speed operation of dehumidification, drying, and cooling after the end of the air conditioning operation, a duct configuration that enables low-speed blowing and high-speed blowing by the same duct is required. 2) Further, after the air conditioning operation is completed and before the packaging, it is necessary to wash and wash the entire air-conditioning member including the processing machine and the duct and the air conditioner located in the air space to be air-conditioned from the viewpoint of food quality maintenance and hygiene. The above ducts and air conditioners are required to have a simple structure that can be washed and use a corrosion-resistant member, and a non-filter function that does not require the use of a filter for removing bacteria and microorganisms, which is conventionally used, is required. Is done. 3) Further, in a food factory where a large amount of cleaning water must be used, an air conditioner having a high dehumidifying capacity is required.

[0010]

Means for Solving the Problems Claim 1 of the present invention
The punching duct for returning and circulating the conditioned air to blow the air to the air-conditioning target air space described above is characterized in that the punching duct is constituted by a punching member capable of variably operating the blowing wind speed by an openable and closable structure.

According to a second aspect of the present invention, there is provided a combined air conditioner for blowing and circulating air-conditioned air to an air-conditioning target air space, and establishing cold-cooling, high dehumidification, and a non-filter function by directly contacting cold water with the air returned from the air-conditioned air space. A direct air conditioner that enables the above is provided in addition to an air handling unit with a cooling and heating coil.

In an air conditioning system according to a third aspect of the present invention, in the air conditioning system for performing air conditioning including required environmental control by blowing and circulating conditioned air to a target air space through a duct by an air conditioner, the duct is opened and closed. The air conditioner is configured with a punching duct that enables variable operation of the blowing wind speed with a possible structure, and the air conditioner can establish low-temperature cooling, high dehumidification, and non-filter function by directly contacting cold water with the return air from the air-conditioned air space The direct air-conditioner is composed of a combined air-conditioner that is attached to an air handling unit with a cooling and heating coil.

Further, the direct contact between the return air from the air-conditioned air space and the cold water according to the second aspect is such that the return air from the air-conditioned air space is blown into the cold water via a punching board and brought into contact with the air bubbles. , Characterized in that.

[0014]

According to the first aspect of the present invention, a duct made of a punching member is provided in a duct for recirculating air to blow out the conditioned air into the conditioned air space, and the end of the duct is configured to be openable and closable. During the air-conditioning operation of the above, the end is closed, and the air can be blown at a low speed of about 0.5 m / s or less from the innumerable punching holes provided over the entire air-space to be air-conditioned.
It is possible to perform low-temperature air conditioning at a temperature of ℃ and eliminate the draft feeling of workers, and also prevent the fall or sowing of accumulated dust containing fine particles or bacteria, thereby preventing environmental pollution to food. In addition, at the time of dehumidification, drying and cooling of the air space to be air-conditioned performed after the end of the air conditioning operation, the end of the duct can be opened to increase the blowing speed from the duct, and the high speed of dehumidification, drying and cooling when the operation is stopped. The operation processing can be performed so that the next operation is not hindered.

According to the second aspect of the present invention, in an air conditioner in which air-conditioning air is blown out to an air-conditioning target air space and recirculated, the low-temperature cooling, high dehumidification and non-cooling are achieved by directly contacting the return air from the air-conditioning air space with cold water. A direct air conditioner that enables the establishment of a filter function is provided, and it is configured to be installed alongside an air handling unit with a cooling and heating coil.
The direct contact enables low-temperature cooling and high dehumidification of the return air from the air-conditioned air space, thereby enabling low-temperature air-conditioning even in a wet air-conditioned air space. In addition, by establishing a non-filter function that reliably removes dust containing fine particles and bacteria by direct contact with cold water, it is possible to form an air conditioning system that does not require a filter. There is no need for complicated management, and clean management can be easily performed.

According to the third aspect of the present invention, in an air conditioning system for performing required air conditioning by blowing and circulating conditioned air to an air conditioned air space through a duct by an air conditioner, the duct has an openable and closable structure. Because it is composed of a punching duct that allows variable operation of the blowing wind speed,
During air-conditioning operation at the time of operation, the above-mentioned end is closed, and approximately 0.5 mm is provided from the innumerable punching holes provided in the entire air-conditioned air space.
Low-speed blowing at m / s or less is performed, and as a result, low-temperature air-conditioning can be performed and the sense of draft for the worker can be eliminated. In addition, it is possible to prevent the accumulated dust containing fine particles and bacteria from lowering and soaring, thereby preventing environmental pollution of food. Next, after the air conditioning operation has been completed,
At the time of drying / cooling, the end of the duct is opened to increase the blowing speed from the duct, so that the dehumidification /
High-speed drying / cooling operation processing can be performed, so that the next operation is not hindered.

In the air conditioner, cold water is brought into direct contact with the return air from the air-conditioned air space, and the temperature of the air is relatively low, for example, 0 to 0.
Since the direct air conditioner, which enables low-temperature cooling of 10 ° C, high dehumidification, and the establishment of a non-filter function, is configured by a combined air conditioner that is attached to an air handling unit with a cooling and heating coil, the direct contact prevents return air from the air-conditioned air space. It enables low-temperature cooling and high dehumidification, and can be used in wet air-conditioned airspaces. Also, dust containing fine particles and bacteria can be reliably removed by direct contact with cold water, and a non-filter air-conditioning system that does not require a filter can be formed. Clean management that does not require special management can be easily performed.

During the air-conditioning operation, low-temperature air-conditioning is performed by the operation of the cooling coil of the direct air-conditioner and the air handling unit and the low-speed blowing operation of the punching duct. Low-temperature and high-speed dehumidification is performed by operating the cooling coil and high-speed blowing operation of the punching duct, and complete removal of residual moisture in the air-conditioning airspace by operating the heating coil of the air handling unit and high-speed blowing operation of the punching duct during the drying operation after sanitation. Then, during the cooling operation before the start of operation, the air conditioning target air space is reduced to about 10 ° C and 60% humidity by operating the cooling coil of the direct air conditioner and air handling unit and operating the high-speed blowing operation of the punching duct. Conditioned atmosphere is set to return to the best conditioning atmospheric conditions hold bacterial growth dried airspace in atmosphere stop working during times by the composite air-conditioner and punching duct.

As described above, by the air conditioning system including the punching duct according to the first aspect and the combined air conditioner according to the second aspect, the environmental air can be cleaned without using a filter and the wet air space is large. Applicable to air conditioning for food processing.

According to the fourth aspect of the present invention, the direct contact between the return air from the air-conditioned air space and the cold water is achieved by compressing the return air from the air-conditioned air space and interposing a punching board. It has a non-filter function of blowing bubbles into cold water to form bubbles in the cold water, and taking in dust containing bacteria and fine particles into the bubbles. Therefore, non-filter air conditioning can be performed, and cleanliness can be easily performed. In addition, the moisture contained in the return air from the air-conditioned air space is vaporized in the compression blowing process, and then the high-humidity is made possible by cooling and condensing in the process of penetrating the punching holes of the punching board forming the cold water container. In addition, as a result of the dehumidified reflux air being blown into the cold water through the punching board, it is scattered in a bubble-like manner in the cold water, enabling high-efficiency heat transfer, and allowing low-temperature cooling with the cold water,
Low-temperature conditioned air can be obtained by mixing with the low-temperature air obtained by the operation of the cooling coil of the air handling unit. The humidity is adjusted by appropriately mixing the low-temperature conditioned air and the return air.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not merely intended to limit the scope of the present invention, but are merely illustrative examples unless otherwise specified. Absent. FIG.
Is a piping diagram of a cooling system of the air conditioning system of the present invention,
FIG. 2 is a schematic diagram showing a schematic configuration of the air conditioning system of the present invention, FIG. 3 is a schematic diagram showing a schematic configuration of a variable operation of the drawing wind speed of the punching duct of FIG. 2, and FIG. It is a schematic diagram which shows the outline structure of a direct air conditioner.

FIG. 1 shows a piping diagram of a cooling system of an air conditioning system when two air conditioners 20 are provided in an air space 10 to be air conditioned. As shown in the figure, a refrigerator unit 26 having a cooling tower 26 a is provided with a cooling coil 21 a of an air handling unit 21 provided in the air conditioners 20, 20 and an ice heat storage tank 27.
The ice storage tank 27 is sent to the heat exchanger 28 for cold water via the cold water pump 27a, and the cold water obtained by the heat exchanger 28 is sent to the direct air conditioner 22 provided in the combined air conditioners 20, 20. The overflow from the cold water container 23 is accommodated in the cushion tank 29, and is circulated to the heat exchanger 28 by the cold water pump 29a.

As shown in FIG. 1, the air conditioner 20 comprises an air handling unit 21 and a direct air conditioner 22 each having an open upper part. The air handling unit 21 includes the cooling coil 2
1a, a heating coil 21b, a fan 21c, etc., the cooling coil 21a is operated during the air conditioning operation of the system, the dehumidifying operation during sanitation, the cooling operation before operation, and the heating coil 21 during the drying operation after sanitation.
b, and the low-temperature air and the drying air are respectively blown out to the upper space 20a by the fan 21c. Further, as described later, the direct air conditioner 22 causes the recirculated air from the air-conditioned air space 10 to come into direct contact with the cold water 23d via the fan 22a and then blows out the air to the upper space 20a. The reflux air cooled at a low temperature from the air conditioner 22 is mixed with a suitable humidity to be supplied to the punching duct 11 via the fan 24. At the time of the drying operation after the dehumidifying operation of the sanitation, the heating coil 21b is operated by a separately prepared heat source, and the heating coil 21b is operated for about 15 minutes.
Dry air of 55 ° C. humidity is supplied to the punching duct 11 via the fans 21c and 24.

FIG. 2 shows a schematic configuration of the air conditioning system of the present invention shown in FIG. 1. As shown in the drawing, the air conditioning system is composed of a combined air conditioner 20 and a punching duct 11, and A required air-conditioning atmosphere is formed in the target airspace 10. Punching duct 1
Numeral 1 designates a rotatable washing door made of a corrosion-resistant punching member. As shown in FIG.
2, the open door 12 is closed during the air-conditioning operation, and the low-temperature conditioned air 10a is blown out at a speed of about 0.5 m / s or less through a number of punching holes 11a provided on the lower surface of the duct.
Low-temperature air conditioning at 10 ° C. and a humidity of 60% is performed.
The above-mentioned low-speed blowing of about 0.5 m / s or less eliminates the draft feeling of the worker and improves the working efficiency, and also prevents dust containing bacteria and microorganisms from falling onto the floor and rising from the floor, thereby improving the food quality. It is configured to prevent environmental pollution.

The composite air conditioner 20 for supplying the conditioned air to the punching duct 11 is made of a simple washable corrosion-resistant member including the air handling unit 21 and the direct air conditioner 22 as described above. The recirculated air 10b is recirculated. As shown in FIG. 4, the direct air conditioner 22 is provided with a cold water container 23 formed of a corrosion-resistant material at an intermediate portion and having a bottom formed by a punching board 23a, a closed space 23b provided with the board 23a, and a fan provided in the space 23b. 22a is inserted in an airtight manner to form a compression space for the return air 10b, and the punching board 2
3b is blown into the cold water 23d through the punching holes to form countless bubbles 23c in the cold water 23d.
The structure is such that a bubble-like direct contact can be made between the return air 10b and the cold water 23d.

With the above structure, the water in the compressed reflux air 10b is supplied from the cold water inlet 25a and comes into contact with the low-temperature punching board 23a by the semi-reserved cold water 23d to condense to form water droplets. Therefore, the return air 10b is highly efficiently dehumidified in the process of passing through the punching holes of the punching board 23a. The cold water overflowing from the cold water container 23 is returned to the cushion tank 29 of FIG. 1 from the cold water outlet 25b.

Further, since the dust composed of bacteria and microorganisms contained in the return air 10b is taken in and removed by the foam 23c, it is possible to form an air conditioning system which does not require a filter, so that the filter becomes dirty and moldy. It is possible to easily perform clean management that does not require complicated management such as generation and lifetime. In addition, high-efficiency heat transfer is enabled by the bubble-like direct contact with the cold water 23d, so that low-temperature cooling of the return air 10b becomes possible.
The low-temperature conditioned air 10a having the required humidity can be obtained by appropriately mixing with the low-temperature air.

Since the complex air conditioner 20 has a simple structure as described above, it is possible to perform a round washing.

FIG. 5 shows the air-conditioning operation during the operation in the air-conditioned air space, the dehumidifying operation by sanitation after the air-conditioning operation is completed, the drying operation after the sanitation, and the atmosphere change in the air-conditioned air space by the cooling operation before the operation is started. 2 and the operation state of the combined air conditioner 20 are shown. Figure (A)
Is a diagram showing the condition of the air conditioning operation during the operation from 7:00 to 23:00 in the morning. In this case, a low-speed blowing of about 0.5 m / s from the punching hole of the punching duct 11 and the cooling coil of the air handling unit 21 are shown. By operating the direct air conditioner 22 and the direct air conditioner 22, a low-temperature air-conditioned atmosphere 10 a of 0 to 10 ° C. indicated by oblique lines is formed. 31,
32 is a mechanical device such as a product processing machine or a packaging machine.

Then, as shown in FIG. 2B, after the operation is completed, the entire air-conditioning target air space is cleaned, and then the dehumidifying operation by sanitation is performed until 24:00 at night. In this case, the opening door 12 at the tip of the punching duct 11 is opened, and the high-speed blowing of the cooling air 10a at about 5 ° C. by operating the combined air conditioner 20 as described above allows high-speed dehumidification of the wet space below the air space to be air-conditioned. Do.

Next, as shown in FIG. 3C, a drying operation is performed from 24:00 at night after the sanitation to 2:00 in the morning. In this case, the heating coil 21b of the air handling unit 21 is operated, and high-speed blowing of dry air of about 15 ° C. and 50% humidity through the opening door 12 is performed, so that the air is blown around the machine and floor below the air space to be air-conditioned. The remaining water wet portion 30 is removed.

Next, as shown in FIG. 2D, the operation of the cooling coil 21a and the direct air conditioner 22 causes the
The cooling operation before the start of operation by blowing high-temperature air at 77 ° C. and a humidity of 77% through the open door 12 from 2:00 in the morning to 7
The process is continued until an air-conditioning atmosphere of about 10 ° C. and a humidity of 60% is formed. As described above, the same duct is used to perform low-temperature air-conditioning operation by low-speed blowout that eliminates the draft feeling of workers and prevents the falling of bacteria and microorganisms when operating, and operates with high-speed blowout after the end of operation Dehumidification / drying / cooling can be completed during the stopped night, so that the next operation is not hindered.

[0033]

According to the above-mentioned structure, a low-speed blowout of about 0.5 m / s or less can be performed during air-conditioning operation by the structure including the punching member of the punching duct and the structure capable of variably controlling the blowout speed. Low-temperature air conditioning at -10 ° C can be achieved, and a sense of draft of the worker can be eliminated, and contamination of foods by bacteria and microorganisms can be minimized. Washing after the end of the air conditioning operation can be performed at a high speed due to the structure of the duct and the air conditioner that can be washed in a circle. In addition, high-speed operation processing can be performed when operation is stopped by dehumidifying operation by sanitation after washing, drying operation after sanitation, and cooling operation by high-speed blowing. Further, the non-filter function can be maintained by the bubble-like direct contact of the return air of the direct air conditioner with the cold water, so that environmental air can be easily cleaned.

[Brief description of the drawings]

FIG. 1 is a piping diagram of a cooling system of an air conditioning system of the present invention.

FIG. 2 is a schematic diagram showing a schematic configuration of an air conditioning system of the present invention.

FIG. 3 is a schematic diagram showing a schematic configuration of a variable operation of a blowing air velocity of a punching duct of FIG. 2;

FIG. 4 is a schematic diagram showing a schematic configuration of the direct air conditioner of FIG. 2;

5A is a diagram showing a state of an air-conditioning operation at the time of operation in an air-conditioned air space, FIG. 5B is a diagram showing a state of a dehumidification operation by sanitation after the end of the air-conditioning operation, and FIG. FIG. 4D is a diagram illustrating a state of a drying operation after the work, and FIG. 4D is a diagram illustrating a state of a cooling operation performed before the start of operation performed thereafter.

[Description of Signs] 10 Air-conditioned area 10a Low-temperature air-conditioned air 10b Return air 11 Punching duct 11a Punching hole 12 Opening door 20 Complex air conditioner 21 Air handling unit 21a Cooling coil 21b Heating coil 21c, 22a, 24 Fan 22 Direct air conditioner 23 Cold water Container 23c Bubble 23d Cold water 26 Refrigerator 27 Ice regenerator 29 Cushion tank

Claims (4)

[Claims] 1. A punching duct, wherein a duct for circulating air to blow out conditioned air to an air-conditioning target air space is constituted by a punching member having a structure capable of being opened / closed to enable a variable operation of a blowing wind speed. 2. An air conditioner in which conditioned air is blown out and circulated in an air space to be air conditioned, wherein cold air is directly brought into contact with circulated air from the air conditioned air space to enable low-temperature cooling, high dehumidification, and establishment of a non-filter function. Characterized in that the air conditioning unit with cooling and heating coils is installed in the air conditioning unit. 3. An air-conditioning system for performing air-conditioning including required environmental control by blowing and circulating air-conditioned air to a target air-space through a duct by an air-conditioner, wherein the duct has an openable and closable structure to perform a variable operation of a blowing wind speed. The air conditioner is made up of a punching duct, and the air conditioner is a direct air conditioner that allows cold air to come into direct contact with the return air from the air-conditioned air space to establish low-temperature cooling, high dehumidification, and a non-filter function. An air conditioning system comprising a combined air conditioner attached to a handling unit. 4. The direct contact between the return air from the air-conditioned air space and the cold water is such that the return air from the air-conditioned air space is blown into the cold water via a punching board to make contact with the air. The air conditioner according to claim 2, wherein