JPH04257652A - Air conditioning device for factory - Google Patents

Abstract

PURPOSE:To increase heat thermal efficiency of air conditioning, taking specific characteristics in a factory under consideration, and make heat distribution even by rectifying the stream of conditioned air by adjusting the positions of air outlets of air feeding ducts and air inlets of air circulating ducts for a plurality of air conditioners. CONSTITUTION:A plurality of air conditioners are provided in response to heat load in a factory, and outlets 9 of air feeding ducts 6, which are connected with the air conditioners and guide conditioned air in the factory, are opened on a wall 7 of the factory at an intermediate height, facing sideways. On a floor surface 8 of the factory, air inlets 13, which are opened upward and suck in air, are provided. The sucked air enters an air circulating duct 12, and is guided in the air conditioner as a circulating air 40. Thus, the conditioned air 39 which comes out from the outlets 9 goes through around industrial machines 3 and working areas of workers and flows in the air inlets 13 orderly, and partial temperature difference is eliminated, and the utilization efficiency of heat is increased.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvements in air conditioners for factories.

0002

2. Description of the Related Art Air conditioning in factories is provided for the health of workers and to prevent the effects of heat from various industrial machines. In the case of conventional equipment, the outlet of the air supply duct is installed at the ceiling position, as in an office or the like. Therefore, among the large spaces within the factory, even the air in the upper space where air conditioning is not necessary becomes a heat load, resulting in poor thermal efficiency of air conditioning.

[0003]Although an air circulation system is normally adopted from the viewpoint of thermal efficiency, it is necessary to install wainscoting on the wall so that the return air duct's suction port does not interfere with the operation of industrial machinery and cargo handling machinery in the factory. Located nearby. For this reason, the airflow from the outlet to the inlet tends to be non-uniform throughout the entire space within the factory, and the air conditioning effect is not sufficiently widespread.

0004

[Object of the Invention] Therefore, an object of the present invention is to take into account the special characteristics of the equipment in the factory, increase the thermal efficiency of air conditioning, arrange the flow of conditioned air, and achieve a uniform heat distribution in the factory. It is.

[0005]

Solution to the Invention In view of the above object, the present invention provides a plurality of air conditioners according to the heat load spaces in a factory, and arranges the outlet of the air supply duct connected to the air conditioners at an intermediate height on the wall side. By opening the return air duct to the side, and forming the intake port of the return air duct upward on the factory floor side, the air flow inside the factory is adjusted and the heat distribution is set to be uniform. There is.

[0006] Here, the outlet of the air supply duct is formed toward the side at an intermediate position between the industrial machine on the floor side and the cargo handling machine on the ceiling side, and in order to increase thermal efficiency during heating,
It is also formed downward on the lower surface of the air supply duct. Also,
The return air duct on the floor side has a suction port that opens toward the top of the floor, but the return air duct on the floor side is formed with an oil pan facing upwards, and the suction port is on the side. This structure prevents oil from entering the factory from entering the return air duct.

[0007] Although the air supply duct is installed independently for each air conditioner to improve heat transfer, the return air duct is installed between multiple air conditioners in order to avoid complicating equipment construction. It is commonly connected to the machine.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 show a factory air conditioner 1 of the present invention installed in a factory 2 to be air conditioned. This factory 2 is composed of two buildings for assembling special-purpose machine tools, for example. Industrial machines 3 such as specialized machine tools are installed along the assembly line on the floor 8 side of the factory 2, and cargo handling machines 4 such as overhead traveling cranes are installed high on the ceiling side of the assembly line. It is attached so that it can be moved in any direction.

As a result, the interior space of the factory 2 is divided into two parts at approximately the middle height: a space necessary for the operation of the industrial machinery 3 and the work of workers, and a space necessary for the cargo handling operations of the cargo handling machine 4. Among these, the space that requires air conditioning is the lower space that includes the industrial machinery 3 and the work space of the workers.

The present invention pays attention to this point, and the heat load space of the factory air conditioner 1 is divided into the working space of the industrial machinery 3 and the workers, that is, the lower part of the internal space of the factory 2 which is divided into upper and lower halves. It is a space.

The factory air conditioner 1 includes a plurality of air conditioners 5, for example four, depending on the heat load space to be air conditioned. In the case of this embodiment, two air conditioners 5 serve as a heat load to the space inside one factory 2, and are installed at appropriate installation positions outside the factory 2.

As shown in FIG. 3, the air supply duct 6 for each air conditioner 5 extends in the longitudinal direction of the factory 2 along the floor 8 below the wall 7, and branches at an appropriate position to connect the wall 7. An air outlet 9 with a damper 11 and an auxiliary air outlet 1 are installed at a height between the industrial machine 3 and the cargo handling machine 4.
0 is formed. The air outlet 9 is formed on the side surface of the air duct 6 and is directed toward the center of the interior space of the factory 2. However, the auxiliary air outlet 10 is formed on the bottom side of the air duct 6 in order to increase heating efficiency. It is formed so as to face downward, and can be opened and closed by a manually operable damper 11.

Furthermore, the air conditioners 5 for each building are connected to a common return air duct 12. Each return air duct 12 is provided centrally along the length of the floor 8 and connects two air conditioners 5 at the ends or at a central branch.
It is connected to the. As shown in FIG.
For example, two oil pans 15 are provided on both sides below the suction port 13. Oil pan 1
5 are both open at the upper surface to form a suction port 17. Note that a plurality of ventilation fans 18 are installed on the side of the factory 2 at a high position, for example.

Next, FIG. 5 shows an example of the air conditioner 5. As shown in FIG. The air conditioner 5 includes a filter 22, a heat exchanger 23, a humidifier 24, and a blower 2 inside the casing 19.
5, etc., and is connected to the air supply duct 6 at the air supply port 26 on the side of the blower 25, and is connected to the air supply duct 6 through the electrically operated damper 28 at the return air port 27 of the chamber on the filter 22 side. 12, and is also connected to a regular outside air intake 20 and a ventilation outside air intake 21 via electrically operated dampers 29, 30.

[0015]The heat exchanger 23 has a heating medium 31.
Introduction circulation piping 32 and switching valves 37, 38
It is connected to a heating unit 33 and a cooling unit 34 via. An electrically operated three-way valve 35 for bypass is provided in the middle of this circulation piping 32, and can be adjusted by the output of a temperature controller 36. The temperature controller 36 detects the temperature inside the factory 2 with a temperature sensor 36a near the return air port 27, for example, and adjusts the opening degree of the electric three-way valve 35 to adjust the temperature.

During heating operation, the heat medium 31 is heated by the heating unit 33 and supplied to the heat exchanger 23 . Also, during cooling operation, the cooling unit 34 cools the heat medium 3.
1 is cooled and supplied to the heat exchanger 23.

Therefore, the air conditioner 5 has the blower 25
Warm or cool air, that is, conditioned air 39, is supplied into the factory 2 from the outlet 9 of the air supply duct 6. At this time, the conditioned air 39 forms a flow in the shape of a quarter arc when viewed from the side, and also acts as an air curtain that divides the interior space of the factory 2 into two vertically. The space surrounding the industrial machine 3 and the space below for worker activities are maintained at an appropriate temperature.

During this time, the temperature controller 36 detects the air temperature inside the factory 2 with the temperature sensor 36a, and adjusts the opening degree of the bypass path of the electric three-way valve 35 based on the deviation from the target temperature. By doing so, the amount of heat medium 31 supplied to the heat exchanger 23 is adjusted, and the temperature inside the factory 2 is adjusted to the target temperature.

[0019] During the heating operation, the auxiliary air outlet 10 is set to an appropriate opening degree in order to increase the heating efficiency. As a result, conditioned air 39 at an appropriate temperature is supplied not only from the upper side but also from the lower side portion. Therefore, the temperature in the space near the wall 7 is also set to an appropriate temperature.

Air inside the factory 2 enters the inside of the return air duct 12 from the suction port 13, becomes return air 40, and is led into the inside of the air conditioner 5.

[0021] In this way, the conditioned air 39 coming out of the outlet 9 passes around the industrial machine 3 and the work area of the worker, and flows into the suction port 13 in an orderly manner. Therefore, the upper space inside the factory 2, which is not subject to air conditioning, does not become a heat load, and the efficiency of heat utilization is increased. Moreover, the outlet 9 and the inlet 13 are formed along the length of the factory, and the conditioned air 39
Even if the air hits an obstacle such as an industrial machine 3 or a worker, the conditioned air 39 is distributed throughout the interior of the factory 2 to create an orderly flow, eliminating local temperature differences. Therefore, this air conditioning method is particularly effective for air conditioning in factories where machines are assembled side by side along a line.

[0022] In this way, the air inside the factory 2 is
By circulating, temperature is efficiently controlled while preventing heat from dissipating to the outside. The regular outside air intake 20 is regulated by a damper 29 to take in a necessary amount of fresh outside air and supply it to the inside of the factory 2 during the air circulation process.

In such heating/cooling operation, when ventilation operation is required, the damper 3 of the ventilation outside air intake 21
0 is set to open, and at the same time, the ventilation fan 18 is set to the operating state. As a result, fresh air is supplied to the inside of the factory 2, and contaminated air inside is discharged to the outside.

[0024]

[Effects of the Invention] The present invention provides the following unique effects. The air outlet is set at approximately the mid-height of the factory space,
Since it is oriented to the side, only the necessary lower space within the factory can be efficiently heated or cooled. therefore,
Heat utilization efficiency for the heat load space is increased.

[0025] Since the outlet of the air supply duct is located on the side of the wall, and the inlet of the return air duct is formed along approximately the center of the floor, a conditioned air flow is formed from the outlet to the inlet. Therefore, the space to be air-conditioned is efficiently heated or cooled, and local temperature differences are eliminated. This improves the work efficiency of workers and increases the productivity of the factory.

[0026] Since an air supply duct is provided for each air conditioner, the supply of cold or warm air after air conditioning is reliable, and since the return air duct is commonly used,
The installation space for the return air duct is small, and the equipment construction is easy, and it can be easily constructed within a factory.

The suction port opens upward on the floor, and since there is an oil pan inside the return air duct and a suction port is formed on the side of the pan, oil and dust are removed from the suction port. Even if there is an inflow, it remains in the oil pan and does not reach the inside of the air conditioner, thereby reliably preventing equipment contamination and oil and dust from entering the conditioned air.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a factory air conditioner seen from the side.

FIG. 2 is a block diagram of a factory air conditioner viewed from above.

FIG. 3 is a side view of the air supply duct.

FIG. 4 is a vertical cross-sectional view of the return air duct.

FIG. 5 is a block diagram of an air conditioner.

[Explanation of symbols]

Claims (4)

[Claims] [Claim 1] In a factory equipped with various industrial machines installed on the floor side of the factory and cargo handling machines installed on the ceiling side of the factory, a plurality of air conditioners according to the heat load in the factory and A connected air duct that leads conditioned air into the factory, an air outlet formed in this air duct that opens laterally at a mid-height on the wall side of the factory, and an outlet that opens upward on the floor of the factory. A suction port that opens to suck in the air inside the factory, a return air duct that guides the air inside the factory sucked by the suction port to the air conditioner, and a heat exchanger inside the air conditioner that uses a heat medium to supply the air with air. A factory air conditioner comprising a heating unit and a cooling unit that supply heat for conditioning. 2. The air conditioner for a factory according to claim 1, wherein the air supply duct is independently connected to each air conditioner, and the return air duct is commonly connected to the plurality of air conditioners. . 3. The air conditioner for a factory according to claim 1, further comprising an auxiliary outlet provided on the lower surface of the air duct in an openable/closable manner. 4. An oil pan is formed below the suction port of the return air duct, and a suction port communicating with the return air duct is formed on the side surface of the oil pan. The factory air conditioner according to claim 2 or 3.