Diffuser of Overhead Circulating Air Handling Unit

Abstract

The present invention relates to a ceiling-type circulating air conditioner. Such a circulating air conditioner (1) comprises: a pair of evaporators (9, 10) each disposed on both sides of the inner upper part of the main body (3); a filter (5) each disposed on the outer side of the pair of evaporators (9, 10) to remove foreign substances contained in the air being sucked in; a suction fan (6) disposed in the middle part of the main body (3) to suck in indoor air and cause it to flow downward, thereby forming an up-and-down circulation flow; and a rotary diffuser (7) rotatably disposed in the lower part of the main body (3) to spray the gas sucked in through the suction fan (6) in all directions to circulate the indoor air. The rotary diffuser (7) concentrates the air flowing downward from the suction fan (6) into a middle through hole (31), then supplies it to a plurality of blades (42) rotatably disposed in the lower part, and by rotating the blades (42), the air passing between the blades (32) is sprayed and supplied in all directions to form a circulating airflow.

Description

Technology Field

[0001] The present invention relates to a diffuser for a ceiling-mounted circulating air conditioner, and more specifically, to a technology in which evaporators are positioned on both the left and right sides at the top, a fan is positioned in the middle lower section, and a rotary diffuser is positioned at the bottom, so that when the fan is driven, air from a large space is drawn in through both evaporators and then supplied into the room through the rotary diffuser, thereby forming a circulating airflow that can evenly distribute the indoor temperature, increase heat exchange efficiency during heating and cooling, and also enable a compact design. Background Technology

[0002] While commonly used air conditioners are suitable for use in spaces such as offices or classrooms, they have limitations in heating and cooling in large spaces with high ceilings, such as large distribution centers, gymnasiums, or auditoriums; in particular, the high or low temperature air discharged from the air conditioner disperses into the space, significantly reducing heating and cooling efficiency.

[0003] Therefore, vertical air conditioners are applied to heat and cool such large spaces. Various structures of these vertical air conditioners have been developed, but generally, they are arranged in the order of filter, intake fan, evaporator, water droplet separator, and diffuser from the top.

[0004] Therefore, when the intake fan is operating, indoor air passes through the filter and the intake fan, is cooled by the evaporator, and then is sprayed into the room through the water droplet separator and diffuser.

[0005] However, these conventional vertical air conditioners have the following problems.

[0006] First, in order to increase the cooling and heating capacity of the air conditioner, it is necessary to increase the size of the evaporator; however, this ultimately leads to an increase in the overall size of the air conditioner and consequently a problem of increased installation area.

[0007] Second, conventional vertical air conditioners have limitations in maintaining a uniform indoor temperature because they simply inject the inhaled air into the room to generate a circulating airflow.

[0008] Third, since the blades of the diffuser supplying air to the room have a fixed structure, there is a problem in that the same amount of air is continuously maintained even when the floor height changes and the amount of air sprayed into the room needs to be changed, making it impossible to respond effectively. Prior art literature

[0009] Patent Application No. 10-2016-0125123 (Title: Air conditioning unit and air conditioning system including the same) The problem to be solved

[0010] Accordingly, the present invention is proposed to solve the aforementioned problem. The objective of the present invention is to provide a ceiling-mounted circulating air conditioner that can evenly distribute indoor temperatures, increase heat exchange efficiency during heating and cooling, and be compact by forming a circulating airflow through which air from a large space is drawn in through both evaporators and supplied into the room through the rotating diffuser when the fan is driven, by placing evaporators on both the left and right sides at the top, a fan at the middle bottom, and a rotary diffuser at the bottom. means of solving the problem

[0011] The present invention is proposed to solve the above-mentioned problems, and one embodiment of the present invention provides an air-circulating air conditioner.

[0012] The air circulation type air conditioner (1) is,

[0013] A pair of evaporators (9, 10) each positioned on both sides of the inner upper part of the main body (3);

[0014] A filter (5) that is placed on the outer side of each of a pair of evaporators (9, 10) to remove foreign substances contained in the inhaled air;

[0015] A suction fan (6) positioned in the middle of the main body (3) to draw in indoor air and cause it to flow downward, thereby forming an upward and downward circulation; and

[0016] It includes a rotating diffuser (7) that is rotatably positioned at the bottom of the main body (3) and sprays gas sucked in through the suction fan (6) in all directions to circulate indoor air, and

[0017] The rotating diffuser (7) concentrates the air flowing downward from the suction fan (6) into the middle through hole (31) and then supplies it to a plurality of blades (42) rotatably arranged at the bottom, thereby rotating the blades (42) so that the air passing between the blades (42) is sprayed and supplied in all directions, thereby forming a circulating airflow.

[0018] And, the rotary diffuser (7) comprises: an air guide plate (Air guide; 30) having a concave shape and a through hole (31) formed in the middle to concentrate air flowing downward; a fixed frame (32) fixed to the bottom of the air guide plate (30); a fixed plate (20) mounted on the lower part of the fixed frame (32); a central axis (36) protruding downward from the bottom surface of the fixed plate (20); a ball bearing (35) rotatably mounted on the central axis (36); a blade assembly (38) rotatably coupled to the outer side of the ball bearing (35); a deceleration roller (51) positioned between the upper part of the blade assembly (38) and the ball bearing (35); and a thrust bearing (48) rotatably mounted on the lower part of the blade assembly (38). It includes a bearing holder (44) that is fastened to the lower part of the central axis (36) to integrally combine the thrust bearing (48) and the blade assembly (38) with the central axis (36).

[0019] The blade assembly (38) comprises a central tube (41) positioned in the middle; a plurality of wings (42) positioned at regular intervals apart from each other on the outer surface of the central tube (41) to push air downward; and a circular frame (40) positioned on the outer surface of the plurality of wings (42) and fixed to the lower edge of the through hole (31) of the air guide plate (30). Effects of the invention

[0020] As described above, the ceiling-type circulating air conditioner according to the present invention has the following effects.

[0021] First, by placing evaporators on both the left and right sides at the top, a fan in the middle bottom, and a rotary diffuser at the bottom, air from the large space is drawn in through both evaporators when the fan is operating and then supplied into the room through the rotary diffuser, thereby forming a circulating airflow that enables an even indoor temperature distribution, increases heat exchange efficiency during heating and cooling, and also allows for a compact design.

[0022] Second, by installing an air circulator directly in the heat load area to supply airflow in a circulating manner, cooling and heating efficiency can be improved.

[0023] Third, by forming the angle of a plurality of concave grooves formed on the outer surface of the central tube (Hub) of the blade assembly at 30 to 45 degrees, the angle of the blade fixed in these concave grooves can be selected according to the floor height. Brief explanation of the drawing

[0024] FIG. 1 is a perspective view showing a ceiling-type circulating air conditioner according to one embodiment of the present invention. Figure 2 is an exploded perspective view of Figure 1. Figure 3 is a side view showing the internal structure of the ceiling-type circulating air conditioner illustrated in Figure 1 from one side. FIG. 4 is a perspective view showing the arrangement structure of the main body of the heating and cooling device, the evaporator, the suction fan, and the diffuser shown in FIG. 2. Fig. 5 is a bottom perspective view of Fig. 4. Fig. 6 is a side view of the suction fan shown in Fig. 2. Figure 7 is an exploded perspective view of the diffuser shown in Figure 2. Fig. 8 is a side view of the diffuser shown in Fig. 7 in a disassembled state. Figure 9 is a side view showing the internal structure of the diffuser illustrated in Figure 8. Figure 10 is an enlarged view showing part A of Figure 9. FIG. 11 is a bottom perspective view of the diffuser shown in FIG. 9. FIG. 12 is an exploded bottom perspective view of the diffuser shown in FIG. 11. Fig. 13 is a plan view of the diffuser shown in Fig. 8. Fig. 14 is a bottom view of the diffuser shown in Fig. 8. Fig. 15 is a side view of the diffuser shown in Fig. 8. FIG. 16 is a perspective view showing the central tube and the concave groove on its surface as illustrated in FIG. 8. Fig. 17 is a side view of Fig. 16. Specific details for implementing the invention

[0025] Hereinafter, a ceiling-type circulating air conditioner according to one embodiment of the present invention will be described in detail with reference to the attached drawings.

[0026] As illustrated in FIGS. 1 to 15, the ceiling-type circulating air conditioner (1) proposed by the present invention comprises: a main body (3); a pair of evaporators (9, 10) each disposed on both sides of the inner upper part of the main body (3); a filter (5) each disposed on the outer side of the pair of evaporators (9, 10) to remove foreign substances contained in the inhaled air; an intake fan (6) disposed in the middle part of the main body (3) to form an up-and-down circulation flow by inhaling indoor air and causing it to flow downward; and a rotating diffuser (Diffuser; 7) rotatably disposed at the bottom of the main body (3) to circulate indoor air by spraying the gas inhaled through the intake fan (6) in all directions.

[0027] In such an air-circulating heating and cooling device,

[0028] Filters (5) are placed on each of the outer sides of the main body (3) to remove foreign substances contained in the air flowing into the main body (3).

[0029] And, a pair of evaporators (9, 10) consists of a first and second evaporator (9, 10) placed on the inner upper part of the main body (3), and the first and second evaporators (9, 10) are placed at a certain distance from each other.

[0030] These pairs of evaporators (9, 10) have the same structure as each other and are each equipped with a support block (11, 13) having a plurality of through holes formed therein, and have a structure in which a heating and cooling coil (C1, C2) is arranged inside the support block (11, 13).

[0031] And, the heating and cooling coils (C1, C2) are connected to the compressor and expansion valve (17) by means of a T-shaped connector (15) and a Y-shaped connector (18).

[0032] That is, a Y-shaped connecting pipe (18) is connected to the inlet side of a pair of evaporators (9, 10) so that liquid refrigerant flows in from the expansion valve (17), and a T-shaped connecting pipe (15) is connected to the outlet side so that gaseous refrigerant is discharged to the compressor.

[0033] Accordingly, the refrigerant supplied from the expansion valve (17) is sucked into the evaporator (9, 10) through the Y-shaped connecting pipe (18), heat exchanged, and then supplied to the compressor through the T-shaped connecting pipe (15).

[0034] At this time, the heating and cooling coils (C1, C2) constitute a heat pump operated by a cooling cycle and may include a compressor, a condenser (not shown), and an expansion valve (17).

[0035] In this way, the evaporator is divided into first and second evaporators (9, 10), thereby maintaining the same cooling and heating capacity while reducing the height by half.

[0036] For reference, a heat pump is a device capable of transferring heat from a low-temperature side to a high-temperature side, and depending on the direction of flow of the medium, the medium flowing inside the coils (C1, C2) can be heated or cooled, and can be used for both heating and cooling.

[0037] In this case, depending on the power source driving the compressor, the heat pump can be a GHP (Gas Heat Pump) driven by the combustion of gaseous fuels such as LPG or LNG, or an EHP (Electric Heat Pump) driven by electricity.

[0038] Specifically, the compressor can be driven by the combustion of gaseous fuel or by electricity, and a medium heated or cooled by a heat pump cycle can flow inside the coils (C1, C2).

[0039] Meanwhile, an intake fan (6) is positioned at the bottom of a pair of evaporators (9, 10) so that external air can be drawn into the interior of the main body (3).

[0040] As shown in FIG. 6, this suction fan (6) includes a fixing plate (20) fixed to the lower part of an upper frame (part designated by reference numeral 10, located at the bottom of the evaporator (9, 10) and the top of the suction fan (6) in FIG. 6); a supporting frame (22) positioned at the lower part of the fixing plate (20); a motor (24) fixed by the supporting frame (22); and a fan assembly (26) mounted on the rotation shaft (28) of the motor (24) to generate suction force when rotated.

[0041] In the above suction fan (6), the motor (24) includes various types of motors, for example, a BLDC type motor. And, a fan assembly (26) is mounted on the rotating shaft (28) of the motor (24).

[0042] Therefore, when the motor (24) is driven, the blades of the fan assembly (26) rotate to draw in air from the upper part and send it down.

[0043] In this way, suction force is generated by the suction fan (6), so that indoor air passes through the filter (5), goes through a pair of evaporators (9, 10), flows downward, and is supplied into the room through the rotating diffuser (7). Accordingly, by this circulating air conditioner (1), an airflow is formed in which indoor air is dispersed downward and then circulates upward.

[0044] And, the air supplied to the lower part can be distributed in all directions by a rotating diffuser (7).

[0045] As shown in FIGS. 7 to 15, this rotary diffuser (7) comprises: an air guide plate (Air guide; 30) having a concave shape and a through hole (31) formed in the middle to concentrate air flowing downward; a fixed frame (32) fixed to the bottom of the air guide plate (30); a fixed plate (20) mounted on the lower part of the fixed frame (32); a central axis (36) protruding downward from the bottom surface of the fixed plate (20); a ball bearing (35) rotatably mounted on the central axis (36); a blade assembly (38) rotatably coupled to the outer side of the ball bearing (35); a deceleration roller (51) positioned between the upper part of the blade assembly (38) and the ball bearing (35); and a thrust bearing (48) rotatably mounted on the lower part of the blade assembly (38). It includes a bearing holder (44) that is fastened to the lower part of the central axis (36) to integrally combine the thrust bearing (48) and the blade assembly (38) with the central axis (36).

[0046] In a rotary diffuser (7) having the above-described structure,

[0047] The air guide plate (30) is a rectangular plate that is bent downwards in a concave shape, and a through hole (31) is formed in the middle. Accordingly, air flowing downwards through the upper suction fan (6) is concentrated in the middle by the air guide plate (30) and passes through the through hole (31).

[0048] A plurality of brackets (33) are arranged on the bottom surface of the air guide plate (30), and a fixed frame (32) is fixed to the plurality of brackets (33) by a screw method.

[0049] And, a fixing plate (20) is screw-connected to the lower middle of this fixed frame (32).

[0050] At this time, the fixing plate (20) is positioned in the middle of the through hole (31) so as not to block the flow of air passing through the through hole (31).

[0051] And, the blade assembly (38) is rotatably coupled by inserting the central tube (41) of the blade assembly (38) into the central axis (36) protruding from the lower part of the fixed plate (20).

[0052] The central tube (41) of the blade assembly (38) is in the shape of a tube, and multiple jaws (57, 59, 60) are formed circumferentially on the inner surface, and a ball bearing (35) is placed on the first jaw (57) located at the top.

[0053] The ball bearing (35) is in the shape of a ring and is inserted into the central axis (36) while seated on the first jaw (57), thereby allowing the blade (42) of the blade assembly (38) to rotate.

[0054] And, a first ring-shaped ring (53) is seated on a second jaw (59) located at the lower part of the first jaw (57), and a plurality of dowel pins (52) protrude from the upper surface of the first ring-shaped ring (53).

[0055] And, a deceleration roller (51) is inserted into each of these multiple dowel pins (52) so that they can rotate.

[0056] This deceleration roller (51) is formed of a friction material, for example, urethane. At this time, the upper surface of the deceleration roller (51) can reduce the rotational speed of the blade assembly (38) by making frictional contact with the lower surface of the ball bearing (35).

[0057] And, a second ring-shaped ring (55) is disposed on the lower part of the third jaw (60) formed on the lower part of the second jaw (59), and a thrust bearing (48) is disposed on the bottom surface of the second ring-shaped ring (55).

[0058] At this time, a bearing holder (44) is placed at the bottom of the thrust bearing (48), and a bolt (46) fastens the bearing holder (44) to the bottom of the central axis (36).

[0059] Accordingly, the blade assembly (38) can be rotatably supported by the bearing holder (44) supporting the lower part of the thrust bearing (48).

[0060] Ultimately, the blade assembly (38) is rotatably supported at the upper end by a ball bearing (35) and at the lower end by a thrust bearing (48).

[0061] And, the air passing through the through hole (31) is distributed in all directions by rotating the multiple blades (42) as it passes through the blade assembly (38).

[0062] As shown in FIGS. 12 to 17, the blade assembly (38) comprises a central tube (41) positioned in the middle; a plurality of wings (42) positioned at regular intervals apart from each other on the outer surface of the central tube (41) to push air downward; and a circular frame (40) positioned on the outer surface of the plurality of wings (42) and fixed to the lower edge of the through hole (31) of the air guide plate (30).

[0063] In this blade assembly (38),

[0064] As described above, a central shaft (36) is inserted into the interior of the central tube (41), a ball bearing (35) is placed on the upper side of the central tube (41), and a thrust bearing (48) is placed on the lower side.

[0065] Accordingly, with multiple wings (42) rotatably inserted into the central axis (36), air flowing downward by the suction fan (6) collides with the wings (42), and by this force, the multiple wings (42) rotate, thereby allowing the air to be dispersed and supplied in all directions.

[0066] And, a plurality of concave grooves (43) are formed on the outer surface of the central tube (41), and a wing (42) is inserted into the concave groove (43) and then fixed by welding or the like.

[0067] At this time, the angle of the wing (42) can be appropriately changed according to the floor height.

[0068] For example, in the case of a building with a high ceiling, the angle (θ) of the wing (42) is set to 30 degrees, and in the case of a building with a low ceiling, it is set to 45 degrees.

[0069] At this time, when the angle (θ) of the wing (42) is 30 degrees, the angle of the concave groove (43) is formed at 30 degrees from the reference line, and when it is 45 degrees, the angle of the concave groove (43) is formed at 45 degrees from the reference line, and the wing (42) is inserted and fixed into the concave groove (43).

[0070] Of course, the above angle is not limited to 30 or 45 degrees, and can be changed to other angles depending on the installation environment.

[0071] Hereinafter, the operation process of a ceiling-type circulating air conditioner according to one embodiment of the present invention will be explained in more detail.

[0072] As shown in FIGS. 1 to 15, when you want to circulate indoor air in the up and down direction, first drive the suction fan (6).

[0073] That is, when the motor of the intake fan (6) is driven, the blades of the fan assembly (26) rotate to draw in air from the upper part and send it down.

[0074] At this time, suction force is generated by the suction fan (6), so that indoor air passes through the filters (5) on both sides and is supplied to a pair of evaporators (9, 10).

[0075] At this time, since a pair of evaporators (9, 10) are connected to an expansion valve (17) by a T-shaped connecting pipe (15) and a Y-shaped connecting pipe (18), the refrigerant, which has become low-pressure and low-temperature as it passes through the expansion valve (17), easily vaporizes in the heating and cooling coils (C1, C2) of the evaporator, thereby absorbing surrounding heat and lowering the air temperature.

[0076] In this way, the air that has passed through a pair of evaporators (9, 10) is sucked in by the lower suction fan (6) and then discharged downward.

[0077] And, the air supplied to the lower part can be concentrated into the middle through hole (31) by the air guide plate (30) of the lower rotating diffuser (7).

[0078] Air passing through the through hole (31) collides with multiple wings (42) while passing through the blade assembly (38), and due to this force, the multiple wings (42) rotate, thereby allowing the air to be dispersed and supplied in all directions.

[0079] Therefore, by generating a circulating airflow in the up and down direction through the rotating diffuser (7), the indoor temperature distribution can be formed uniformly.

[0080] At this time, in the case of a building with a high ceiling, the angle (θ) of the wing (42) is set to 30 degrees, and in the case of a building with a low ceiling, it is set to 45 degrees so that sufficient air can be supplied to the indoor space.

Claims

Claim 1 A pair of evaporators (9, 10) each disposed on both sides of the inner upper part of the main body (3); a filter (5) each disposed on the outer side of the pair of evaporators (9, 10) to remove foreign substances contained in the inhaled air; an intake fan (6) disposed in the middle part of the main body (3) to form an up-and-down circulation flow by inhaling indoor air and causing it to flow downward; and a rotating diffuser (7) rotatably disposed in the lower part of the main body (3) to circulate indoor air by spraying the gas inhaled through the intake fan (6) in all directions, wherein the rotating diffuser (7) includes an air guide plate (Air guider; 30) having a concave shape and a through hole (31) formed in the middle to concentrate the air flowing downward; a fixed frame (32) fixed to the bottom of the air guide plate (30); and a fixed plate (20) mounted on the lower part of the fixed frame (32). A central axis (36) protruding downward from the bottom surface of a fixed plate (20); a ball bearing (35) rotatably mounted on the central axis (36); a blade assembly (38) rotatably coupled to the outside of the ball bearing (35); a deceleration roller (51) positioned between the upper part of the blade assembly (38) and the ball bearing (35); and a thrust bearing (48) rotatably mounted on the lower part of the blade assembly (38). A circulating air conditioner comprising a bearing holder (44) that is connected to the lower part of the central axis (36) to integrally combine the thrust bearing (48) and the blade assembly (38) with the central axis (36), and a rotary diffuser (7) that concentrates air flowing downward from the intake fan (6) into a middle through hole (31), then supplies it to a plurality of blades (42) rotatably arranged at the lower part, and by rotating the blades (42), the air passing between the blades (42) is sprayed and supplied in all directions to form a circulating airflow. Claim 2 In claim 1, a pair of evaporators (9, 10) are arranged on the inner upper side of the main body (3) and include first and second evaporators (9, 10) arranged at a certain distance from each other, and each of the first and second evaporators (9, 10) is provided with a support block (11, 13) having a plurality of through holes formed therein, and a heating and cooling coil (C1, C2) is arranged on the inner side of the support block (11, 13) and connected to an expansion valve (17), forming a circulating air conditioner. Claim 3 In claim 1, the suction fan (6) comprises a fixing plate (20) fixed to the lower part of an upper frame; a supporting frame (22) positioned at the lower part of the fixing plate (20); a motor (26) fixed by the supporting frame (22); and a fan assembly (26) mounted on the rotation shaft (28) of the motor (26) to generate suction force when rotated, forming a circulating air conditioner. Claim 4 delete Claim 5 In claim 1, the blade assembly (38) comprises a central tube (41) positioned in the middle; a plurality of wings (42) positioned apart from each other at regular intervals on the outer surface of the central tube (41) to push air downward; and a circular frame (40) positioned on the outer surface of the plurality of wings (42) and fixed to the lower edge of the through hole (31) of the air guide plate (30), wherein a plurality of concave grooves (43) are formed on the outer surface of the central tube (41), and the wings (42) are inserted into and fixed in the concave grooves (43), and the angle at which the concave grooves (43) are formed can be changed according to the floor height, thereby allowing the angle of the wings (42) to be changed as well, in a circulating air conditioner.

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