KR790001301B1 - Air conditioning apparatus - Google Patents

Abstract

An induction type air conditioning apparatus had a first and second heat exchanger, one was connected to a source of a relatively cold heat exchanger medium and the other to a source of a relatively warm medium, and control unit for determining the flow path of air induced from the space into a mixing chamber of an air conditioning unit by the discharge of primary air within the casing of the unit.

Description

Air conditioner

1 is a partially cross-sectional perspective view of an air conditioner embodying the present invention.

2 is a schematic illustration of the control of the air conditioner shown in FIG.

3 is a cross-sectional view of the air conditioner of FIG. 1 of the first mode of operation.

4 is a view similar to the third view showing a device of a second mode of operation;

5 is another cross-sectional view of the device, showing a third mode of operation.

FIELD OF THE INVENTION The present invention relates to air conditioners, and more particularly to air couditnoring units of the induction type.

Inlet air conditioners are well known to those skilled in the art. Such devices generally have a casing having a space connected to the main air reservoir installed therein. The main air is supplied from the center at a relatively high speed and high static pressure. The main air is discharged from the space through the nozzle and thus, as secondary air, air from the room is generally introduced into the mixing vessel of the apparatus. Generally, a heat exchanger connected to a storage compartment of a relatively cold heat exchange medium or to a storage compartment of a relatively warm heat exchange medium provides a flow passage inlet for the air in the mixing passage of the device. Main air and secondary airflows are mixed in this bin and discharged there to provide the required temperature values with the room controlled by the apparatus.

Inflow air conditioners are commonly used for air conditioning in buildings with multiple offices or rooms, such as office buildings, schools and hospitals. Most inlet air conditioners are designed to provide the user with the required temperature without affecting the air temperature in other rooms or offices in the building.

Until now, most intake systems have been used in two pipe air conditioning systems. The main disadvantage of these two pipe air conditioning systems is that the heat exchange medium supplied to the individual inlets must be either relatively warm or relatively cold. Particularly during the seasons, some offices in the building require heating while others require cooling. Since the temperature of the heat exchange medium is constant throughout the system, some users will not be able to achieve the required temperature conditions of their respective rooms.

In US Pat. Nos. 3, 323, and 584, an inlet air conditioner suitable for use in four pipe air conditioners has been invented. The use of two heat exchangers, each with a relatively cold heat exchange medium and a relatively warm heat exchange medium supplied, allowed each user to obtain the required temperature values in a wide range. For example, some devices have been operated to provide heating while others have provided cooling. Although the four pipes each have the ability to ignore the user's preferences and provide extremely comfortable conditions throughout the building, they are expensive to install and adjust. Relatively complex dampers required to selectively direct secondary air over a desired heat exchange coil with the required temperature values have increased the manufacturing costs of the present device. In addition, the necessary damper automats, such as complex air or electric controls, have further increased the cost of manufacturing these devices, thus increasing the cost of installing and operating each device and air conditioner.

In U. S. Patent Nos. 3, 122 and 201, an inlet air conditioner is employed which uses main air to selectively inflate the bellows which regulates the flow of air around or through the heat exchange coil. However, the inlet device invented in US 3, 122, 201 can only be used in two pipe air conditioners.

It is therefore an object of the present invention to provide an inlet air conditioner suitable for use in four pipe air conditioning systems.

It is a further object of the present invention to provide an inlet device suitable for use in four pipe arrangements using main air as the actuation force for actuating the damper.

It is a further object of the present invention to provide a novel device for regulating the inlet device used in four pipe air conditioning units.

It is a further object of the present invention to provide a novel damper device which selectively directs secondary air entering the inlet device through the required flow passage.

This or another object of the present invention is achieved by providing an inlet device having a first heat exchanger that provides a primary flow passage of air into the air conditioner. The primary heat exchanger is connected to a reservoir of relatively cold heat exchange medium. The secondary heat exchanger provides a secondary flow passage for the inlet air. The secondary heat exchanger is connected to a reservoir of relatively warm heat exchange medium. The device provides a third flow passage of the inlet air, which flows through the primary and secondary heat exchangers. The inflated bellows is connected to the main air and the main air pressure in the bellows is controlled by changing the room temperature. The damper device is connected to the bellows to direct air through the selected one of the flow passages to achieve the required temperature control in the room.

Referring to the drawings, there is shown an air conditioner embodying the present invention. When referring to the several figures, like numerals refer to like parts.

With particular reference to FIG. 1, an air conditioner 10 is shown. Future 10 is known to the skilled person as an inflow device. The air conditioner has a casing 11 with 14 spaces in it. The space bin 14 is connected to the main air reservoir via a suitable duct 15 (not shown). Main air is supplied to unit 10 at high speed and high static pressure. The main air is discharged from space 14 through nozzle 16 with nozzle orifice 17. The nozzle operates to discharge the main air at a relatively high speed to allow the secondary air from the room or room to be sucked into the mixing vessel 18. Secondary air entering the device passes through it through inlet grate 12. The mixture of main air and secondary air is discharged from the device into the room through an exhaust grate or outlet 13.

In the apparatus, primary and secondary heat exchangers 19 and 20 are installed. The heat exchanger 19 is connected to a reservoir of relatively cold heat exchange medium (not shown), for example cold water which is fed to the heat exchanger via the inlet pipe 21.

Heat exchanger 20 is connected to a suitable reservoir of relatively warm heat exchange medium, for example warm water. The heat exchanger 20 has an inlet pipe 23 and an outlet pipe 24 of this heat exchange medium. As explained more fully hereinafter, heat exchanger 19 provides a primary fluid flow path for the secondary air entering the air conditioner. Heat exchanger 20, on the other hand, provides a secondary fluid passageway for the air drawn into this device. The way in which air passes through a selected flow passage or through a third flow passage having heat exchangers 19 and 20 will be described more fully later.

Dampers 26 and 27 are connected to the heat exchangers 19 and 20 for operation. Dampers 26 and 27 form controls to direct air only to one selected flow path. Furthermore, the regulator has a swelling bellows 25. The plate member 45 is operatively connected to the bellows and the position of the plate changes in accordance with the degree of expansion of the bellows. The spring 46 supplies a force on the plate member 45 against the force supplied by the bellows.

The primary link 28 is connected to and moves with the plate member 45. Secondary link 30 is properly connected to link 28 via pin 29. Furthermore, it has a tertiary link 31 properly connected to link 30 via pin 47 '. Link 31 has long grooves 35 and 36.

Damper 26 is connected to a heat exchanger 20 having a relatively warm heat exchange medium flowing therein. Damper 26 is attached to link 49 and the damper is designed to rotate around point 33. Link 49 has pin 37 and is positioned to move into the long groove 36 of link 31.

Damper 27 is attached to rotate on link 48 and is designed to rotate around point 32. Link 48 has a pin 34 and is installed to move into the long groove 35 of link 31. One end of the tension spring 38 is properly connected to link 48 and the other end of the spring is connected to link 49.

Referring to FIG. 2, an illustrative illustration of a preferred adjuster for adjusting the position of the swelled bellows 25 is shown.

Main air from doc 15 is supplied to pressure regulator 40 through filter 39. The pressure regulator 40 maintains a constant designed flow pressure, ignoring the main air pressure change in the duct. The orifice 41 is connected to the bottom of the regulator 40 and to the bleed thermostat 42. The bleed thermostat has an orifice 44 with a bimetallic element 43 suitably positioned thereon. The inflatable bellows 25 is connected between the orifice 41 and the thermostat 42. The thermostat operates to close the orifice 44 which increases the pressure signal on the swelling bellows 25 so that the bellows extends if the room temperature is above the design temperature value. In other words, when the room temperature falls below the design value, the bimetallic element operates to obtain an orifice 44 which reduces the pressure signal supplied to the bellows 25 so that the bellows sinks lower. It will be explained that the regulation operates to selectively direct secondary air through the flow passages necessary to achieve the required temperature conditioning in the room.

Referring to FIG. 3, the apparatus is shown when operating in the form of cooling. With the previous explanation in mind, when the thermostat senses that the room temperature is above the design value, the swelling bellows 25 main air pressure signal is increased to increase the bellows expansion. The planar member 45 rotates counterclockwise as a result of the expansion of the bellows 25. Link 28 similarly rotates counterclockwise around rotation point 46 '. Thus, the link 30 moves to the left as shown in the figure. Link 31 similarly moves as shown in the figure.

Movement to the left of the link 31 moves the right edge of the long groove 35 into contact with the pin 34, thus causing the damper 27 to rotate clockwise around point 32. The damper thus permits secondary air to flow into the device to pass through the heat exchange coil 19th in relation to the relatively cold heat exchange medium that flows through it, and before the secondary air is mixed with the main air for controlled release or indoor discharge. The position described in FIG. 3 to cool is taken. When the device is operated in the manner shown in the third wave, the damper 26 is positioned to prevent any flow of secondary air through the heat exchanger 20 with the relatively warm heat exchange medium flowing there through.

When the air temperature in the room is reduced to reach the indication, the thermostat senses this occurrence and the bimetallic element 43 partially opens the orifice 44, thus reducing the main air pressure signal supplied to the bellows 25 and partially lowering the bellows. Let it sink. The spring 46 provides a force on the plate member 45 which causes the member to rotate clockwise when the bellows sinks low. Similarly, link 28 also rotates clockwise to move links 30 and 31 to the right as shown in FIG.

If link 31 moves to the right, long groove 36 moves relative to pin 37 of link 49 such that the pin contacts the left edge of the groove. However, the spring 38 provides a force to keep the damper 26 in its closed position relative to the heat exchanger so that secondary air flow over the heat exchanger is prevented.

If the link 31 moves to the right as shown in FIG. 4, the long groove 35 moves with it. However, the groove does not move relative to pin 34, but rather the pin moves along the groove by the force provided by the spring 38. This spring force rotates damper 27 counterclockwise around point 32 to move the damper to the closed position relative to heat exchanger 19 and thus prevents any flow of inlet air thereon.

When the damper is positioned in the form shown in FIG. 4, air entering the apparatus through the discharge path of the main air flows through the second flow passage 47 without passing through both heat exchangers.

Referring to FIG. 5, the device is shown operating in the form of heating. If the room temperature falls below a predetermined or fixed value, the bimetallic element 43 operates to fully open the orifice 44 and continues to discharge the main air pressure signal from the bellows 25 thereby sinking the bellows low. The spring 46 exerts a force to rotate the plate member 45 clockwise around point 46 '. Link 28 similarly rotates clockwise. Further clockwise movement of link 28 causes links 30 and 31 to move further to the right as shown in FIG.

This movement overcomes the force of the spring 38 so that the damper 26 rotates counterclockwise around the point 33 and exerts a force on the connection point between the pin 37 and the elongated groove 36. Although the long groove 35 moves relative to the fin 34, no further movement of the damper 37 is obtained since the damper is already in blockage or contact with the heat exchanger 19.

Thus, since damper 26 has been moved from the containment position with respect to such a heat exchanger, secondary air induced in the apparatus flows through the tertiary flow passage as provided by heat exchanger 20. The induced secondary air will continue to flow over the heat exchanger in a heat transfer relationship with the relatively warm heat exchange medium passing through it until the required room temperature is obtained. Once this room temperature is obtained, it is inflated as described to place the device in the form of passage as shown in bellows figure 4.

The inlet device according to the invention can be used in four pipe air conditioners without the expensive and complicated adjustments required to direct air through the desired flow passages to obtain satisfactory temperature control of the controlled room.

While the preferred embodiments of the invention have been described and illustrated, the invention is not limited thereto but may be practiced otherwise within the scope of the following claims.

Claims (1)

The filling cylinder 14 in the casing 11 is connected to the primary air source 15 to discharge primary air in the casing from the nodule means 16 installed in the filling cylinder, and the primary heat exchange means 19 in the casing. Is connected to a relatively cold heat exchange medium source 21 and is installed in a primary air flow path through which air drawn from the room is introduced to discharge the primary air to the air mixture 18 in the casing 11. The secondary heat exchange means 20 in the casing is connected to a relatively warm heat exchange medium source 23 and is installed in a secondary air flow path of air drawn from the room, so as to discharge primary air in the mixing cylinder 18. And The secondary heat exchange means is separated from the primary heat exchange means to form a tertiary air flow path 47 guided from the interior into the mixing cylinder 18 therebetween, and the air guided from the interior into the air mixture cylinder is 3 Passing through the primary air passage 47, the air passing through the tertiary air passage 47 is to bypass the primary and secondary heat exchange means (19, 20), the primary and secondary The dampers 26 and 27 associated with the heat exchange means 19 and 20 select one of the flow paths and supply the regulated air to the room to instruct the air to be guided. An inflatable bellows 25 is adapted to actuate the dampers 26, 27, and is connected to the primary air source, and thermostats 40, 41, 42, 43, 44 are provided in the room. Primary ball in the inflatable bellows by sensing temperature By designating the position of the dampers (26, 27) by adjusting the pressure of the designating air to be introduced into the mixing cylinder 18 through the selected one of the flow path and the air discharged from the mixing cylinder to the room required temperature Air conditioning device characterized in that to be adjusted to.

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