KR0175861B1 - Protecting apparatus of absorbing gate of in-door machine in airconditioner - Google Patents

Abstract

The present invention relates to an inlet shielding device of an indoor unit of an air conditioner, the body 50 having an inlet 51 formed at one side thereof, and a blocking plate 53 which is opened and closed at one side of the inlet 51 of the body 50. ) And operating means (55, 55 ') for operating the blocking plate (53) by operating the pressure of the refrigerant and the solenoid valves (67, 67'). When operating the conditioner can open the blocking plate to increase the thermal efficiency, when the air conditioner stops to close the blocking plate to prevent the inflow of foreign matter into the body.

Description

Inlet shield of indoor unit of air conditioner

1 is a system diagram of a general air conditioner.

2 is a longitudinal sectional view showing an indoor unit of a conventional air conditioner.

3 is a longitudinal sectional view showing an indoor unit of an air conditioner to which an inlet shielding device according to an embodiment of the present invention is applied.

4 (a) to 4 (c) is a longitudinal cross-sectional view showing the operating state of the inlet shield of the indoor unit of the air conditioner according to an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

50: body 51: inlet

53: blocking plate 55,55 ': operating means

57,57 ': Cylinder 63,63': Guide tube

65,65 ': Elastic means 67,67': Solenoid valve

69,69 ': wires

The present invention relates to an indoor unit of an air conditioner, and in particular, by opening / closing the inlet of the indoor unit according to the operation of the air conditioner, thereby improving the thermal efficiency and preventing the inflow of foreign substances into the interior of the indoor unit. It relates to a shield device.

The air conditioner operates as an indoor unit installed indoors and an outdoor unit installed outdoors, and may be cooled or heated as needed.

Conventionally, as shown by the arrow (solid line) in FIG. 1, during the cooling operation of the air conditioner consisting of the indoor unit 1 and the indoor unit 3, the high temperature and high pressure refrigerant gas discharged from the compressor 5 is subjected to outdoor heat exchange. Heat exchanged with the outdoor air while being cooled and condensed in the air (7), the liquefied high-pressure refrigerant is introduced into the capillary tube (9). The high pressure refrigerant liquid introduced into the capillary tube 9 is converted into a low pressure refrigerant liquid by the adiabatic expansion effect of the capillary tube 9 and flows into the indoor heat exchanger 11. In the indoor heat exchanger (11), the refrigerant liquid is exchanged with the indoor air while being evaporated and converted into refrigerant gas. The refrigerant gas is introduced into the compressor (5) and converted into a refrigerant gas of high temperature and high pressure by the compressor (5). Repeat the cycle described above.

In the heating operation of the air conditioner, the refrigerant is circulated in the opposite direction to the cooling operation described above to heat the room. That is, the refrigerant gas is condensed in the indoor heat exchanger (11) to heat exchange with the indoor air to heat the room.

On the other hand, the indoor unit of the conventional air conditioner having a suction port on the upper side, as shown in FIG. 2, the suction port 15 is formed in the front side of the body 10 so that the indoor air is sucked into the body 10; In the lower part of the body 10, a discharge port 17 is formed to discharge the heat exchanged air in the body 10 back to the room, and the air is guided to the discharge port 17 side in the lower side of the body 10. The guide plate 19 is disposed so that the air filter 21 is detachably disposed on the rear surface of the suction port 15 so as to filter dust and the like contained in the air sucked into the body 10, and the air filter 21. On one side of the indoor heat exchanger 23 is disposed so as to heat exchange with the indoor air refrigerant, the front side of the suction port 15 has a structure in which the suction grill 25 is detachably disposed to protect the suction port 15. have.

In addition, a condensate receiver 27 is disposed below the indoor heat exchanger 23 so that condensed water generated by a defrosting operation that removes frost generated on an outer surface of the indoor heat exchanger 23 during cooling operation may flow out. And a blower (29) for generating a circulation force for air to suck the indoor air into the indoor unit and discharge it back into the room, on one side of the indoor heat exchanger (23). ), A plurality of wind direction up and down control blades 31 and wind direction left and right control blades 33 are arranged to adjust the discharge direction of the air discharged to the room up and down and left and right.

In addition, a plurality of through holes 25a are formed in the suction grill 25 so as to communicate with the suction ports 15.

In the indoor unit of the conventional air conditioner configured as described above, when the operation unit (not shown) is operated such that the indoor unit is cooled and operated, the blower 29 is rotated by the operation of the motor (not shown), and the indoor heat exchanger 23 The refrigerant flows inside by the operation of the refrigerant cycle as shown in FIG.

On the other hand, the pressure difference of air is generated between the lower part in the body 10 and the outside of the body 10 by the rotation of the blower 29, and the indoor air is a through hole of the suction grill 25 by the pressure difference. After passing through 25a and the suction port 15 sequentially in the upper portion of the body 10 and passing through the indoor heat exchanger 23 and heat-exchanging with the refrigerant flowing in the indoor heat exchanger 23, the guide plate ( It is guided by 19) and is discharged to the room through the discharge port 17.

At this time, the air sucked into the body 10 through the inlet 15 is filtered by the air filter 21, the air discharged from the body 10 to the room is a plurality of wind direction disposed in the discharge port 17 The discharge direction is adjusted up and down and left and right by the vertical adjustment blade 31 and the wind direction left and right adjustment blade 33.

However, in the indoor unit of the conventional air conditioner configured as described above, since the air is sucked into the body 10 through the through hole 25a of the suction grill 25, the air suction amount is not sufficient, so that the indoor heat exchanger 23 There is a problem that the heat exchange efficiency in the air conditioner is low and the air conditioner does not fully exhibit its performance.

In addition, when the air conditioner is turned off, foreign matters or the like may be introduced into the suction grill 25 through the through-hole 25a to frequently clean the inside of the body 10, as well as air conditioning. When the machine is operated again, foreign matters introduced into the body 10 are temporarily discharged into the room through the discharge port 17 and contaminate the indoor air, causing inconvenience to the user, and deteriorating the cleanliness of the indoor air. There was this.

In addition, when the air conditioner is not used for a long time, the entire air conditioner is covered with a plastic cover to prevent foreign substances from entering the inside of the body 10 through the through hole 25a of the suction grill 25. The problem is that the appearance is not beautiful.

Accordingly, the present invention has been made to solve the problems described above, an object of the present invention is to provide a blocking plate that is automatically opened and closed by the adjustment of the pressure and the solenoid valve of the refrigerant changes according to the operation / stop of the air conditioner. Exposed to one side of the inlet of the body, open the blocking plate when the air conditioner is operating to increase the thermal efficiency, and close the blocking plate when the air conditioner is stopped to prevent foreign substances from entering the interior of the body. It is to provide an intake shield of the indoor unit.

Inlet shielding device of the indoor unit of the air conditioner according to the present invention made to achieve the above object is a body formed with a suction port on one side, the blocking plate which is opened and closed on one side of the suction port of the body, the pressure and the solenoid valve of the refrigerant It characterized in that the operating means for operating the blocking plate by the operation.

In addition, the actuating means includes a cylinder, a piston moving inside the cylinder, a piston rod connecting the piston and the blocking plate to open and close the blocking plate according to the movement of the piston, and the piston moving in one direction. A guide tube for guiding the refrigerant inside the cylinder, elastic means for restoring the piston moved by the refrigerant, and an electromagnetic valve disposed in the guide tube to block the refrigerant passing through the cylinder. do.

At this time, the operating means are disposed on the upper and lower sides of the body so as to tilt the blocking plate in a plurality of directions according to the operation of the solenoid valve.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected about the part same as the part shown in FIG. 2, and the overlapping description is abbreviate | omitted.

As shown in FIG. 3, a suction port 51 is formed at the front side of the body 50 so that indoor air is sucked into the body 50, and at one side of the suction port 51 of the body 50. A blocking plate 53 is disposed to block the air entering and exiting the inlet 51, and one side of the blocking plate 53 operates the blocking plate 53 by operating the pressure of the refrigerant and the solenoid valve. Actuating means 55, 55 'are disposed.

In addition, an air filter 56 is detachably disposed on the rear surface of the suction port 51 to filter dust and the like contained in the air sucked into the body 50.

A plurality of protrusions 50a, 50b, and 50c are formed at the suction port 51 side of the body 50 so that the blocking plate 53 is easily in contact with each other, and the operation means 55 is provided at the protrusions 50a and 50b. ) Are each excreted.

The operating means 55 and 55 'are provided with cylinders 57 and 57' respectively disposed inside the protrusions 50a and 50b, and the cylinders 57 and 57 'are disposed within the cylinders 57 and 57' according to the pressure of the refrigerant. Pistons 59 and 59 'are coupled to the inner surfaces of the 57 and 57', and the piston rods 61 and 61 'are opened and closed to open and close the blocking plate 53 according to the movement of the pistons 59 and 59'. Is connected to the piston (59, 59 ') and the blocking plate (53), and guide pipes (63, 63') guide the cylinder (57, 57) to guide the refrigerant inside the cylinder (57, 57 '). ', And elastic means (65, 65') is disposed on one side of the piston (59, 59 ') to move in one direction the piston (59, 59') moved by the refrigerant; In addition, the solenoid valves 67 and 67 'are disposed in the middle portion of the guide tubes 63 and 63' so as to block the refrigerant passing through the cylinders 57 and 57 '.

At this time, the operating means (55, 55 ') are disposed on the upper and lower sides of the body (50) so as to tilt the blocking plate 53 in a plurality of directions.

The guide pipes 63 and 63 'are connected in communication with a cylinder space whose one end is formed on the left side of the piston 59 and 59', and the other end thereof is connected to a refrigerant pipe connecting a heat exchanger and a compressor which act as an evaporator. It is.

The elastic means (65, 65 ') is a spring, the cylinder space formed on the right side of the piston (59, 59') to interact with the pressure of the refrigerant flowed into the cylinder space on the left side of the piston (59, 59 ') Excreted on

At this time, the moving force of the pistons 59 and 59 'by the elastic means 65 and 65' is greater than the moving force of the pistons 59 and 59 'by the low pressure side refrigerant when the air conditioner is operated. When the air conditioner is stopped, the spring constant of the elastic means 65, 65 'is determined so as to be smaller than the movement force of the pistons 59, 59' by the low pressure side refrigerant.

Wires 69 and 69 'connected to control means (not shown) are connected to the solenoid valves 67 and 67'.

The operation and effects of the inlet shield of the indoor unit of the air conditioner according to the embodiment of the present invention configured as described above will be described below.

In general, when the air conditioner is operating, the pressure of the refrigerant compressed by the compressor in the refrigerant cycle is about 20. Of (Gauge pressure), and the pressure of the refrigerant expanded in the capillary tube (or expansion valve) is about 5 6 Of (Gauge pressure). Therefore, the pressure of the refrigerant gas passing through the evaporator is about 5 6 Of (Gauge pressure).

When the air conditioner is stopped, the high pressure of the refrigerant passing through the compressor is transferred to the low pressure side of the refrigerant passing through the capillary tube (or expansion valve), and the refrigerant pressure is about 10 in the refrigerant passage as a whole. 11 Of (Gauge pressure) Therefore, the pressure of the refrigerant gas passing through the evaporator is about 10 11 Of (Gauge pressure).

In the inlet shielding device of the indoor unit of the air conditioner according to an embodiment of the present invention, when the air conditioner is to be operated to suck air into the interior of the body 50 from the upper and lower sides of the blocking plate 53, the body The solenoid valves 67 and 67 'of the operating means 55 and 55' disposed on the upper and lower sides of the 50 are opened.

That is, when the operation switch (not shown) is operated, power is applied to the solenoid valves 67 and 67 ', the solenoid valves 67 and 67' are opened, and the compressor not shown is operated to operate the air conditioner. The low pressure side refrigerant flows into the left space of the cylinders 57 and 57 'through the guide tubes 63 and 63' and moves the piston 59 and 59 'by the elastic means 65 and 65'. The piston overcomes the moving force of the pistons 59 and 59 'by the low pressure side refrigerant, moves the pistons 59 and 59' to the left, and the piston rods 61 and 61 'fixed to the pistons 59 and 59'. The blocking plate 53 mediated by is opened at the inlet of the body 50.

Therefore, since a large amount of air flows into the body 50 in the direction indicated by the arrow in FIG. 4 (a), the heat exchange efficiency of the indoor heat exchanger 23 is high, and the air conditioner fully exhibits its performance. It is.

When the air conditioner is turned off, the pressure is uniform in the refrigerant pipe of the refrigerant cycle, and the pressure of the low pressure side refrigerant passing through the evaporator is increased, and the left space of the cylinders 57, 57 'is passed through the guide pipe 63. The movement force of the pistons 59 and 59 'by the refrigerant introduced into the engine overcomes the movement force of the pistons 59 and 59' by the elastic means 65 and 65 'and the piston 59 and 59' to the right. And a blocking plate 53, which is mediated by piston rods 61 and 61 ′ fixed to the pistons 59 and 59 ′, are in close contact with the body 50.

Therefore, when the air conditioner is not used, foreign matters and the like do not flow into the inside of the body 50, so that the trouble of having to clean the inside of the body 50 is eliminated, and clean air when the air conditioner is operated again. Is discharged into the room to give a refreshing feeling to the user.

Then, when the air conditioner is to operate to suck the air into the interior of the body 50 only from the upper side of the blocking plate 53, the solenoid valve of the operating means (55 ') disposed on the lower side of the body (50) 67 ') does not work.

That is, when the operation switch (not shown) is operated, power is applied to the solenoid valve 67 and no power is applied to the solenoid valve 67 ', as shown in FIG. 4 (b). Since the upper side of the 53 is opened at the inlet of the body 50 and the lower side of the blocking plate 53 is in close contact with the body 50, air flows into the body 50 from the upper side of the blocking plate 53.

In addition, if it is desired to suck air into the body 50 only from the lower side of the blocking plate 53 when the air conditioner is operating, the solenoid valve 67 of the operating means 55 disposed on the upper side of the body 50. ) Doesn't work.

That is, when the operation switch (not shown) is operated, power is applied to the solenoid valve 67 'and no power is applied to the solenoid valve 67. As shown in FIG. 4C, the blocking plate 53 is shown. Since the lower side of the body 50 is opened at the inlet and the upper side of the blocking plate 53 is in close contact with the body 50, air flows into the interior of the body 50 from the lower side of the blocking plate 53.

Therefore, the inflow passage of the air flowing into the body 50 can be changed as necessary.

As described above, the inlet shielding device of the indoor unit of the air conditioner according to the present invention includes a blocking plate that is automatically opened and closed by adjusting the pressure of the refrigerant and the solenoid valve that change according to the operation / stop of the air conditioner. Exposed to one side, the operation of the air conditioner to open the blocking plate to increase the thermal efficiency, when the stop of the air conditioner has a very excellent effect of preventing the inflow of foreign matter into the body.

Claims (2)

A body 50 having a suction port 51 formed at one side thereof, a blocking plate 53 opened and closed at one side of the suction port 51 of the body 50, and an operation means 55 for operating the blocking plate 53. In the inlet shielding device of the indoor unit of the air conditioner consisting of 55 '), the operating means 55, 55' are formed of the cylinders 57, 57 'and the cylinders 57, 57'. The piston 59, 59 ′ and the blocking plate 53 to open and close the blocking plate 53 in accordance with the movement of the piston 59, 59 ′ and the piston 59, 59 ′ moving therein. Piston guides 61 and 61 'for connecting the piston rods, and guide tubes for guiding the refrigerant inside the cylinders 57 and 57' to move the pistons 59 and 59 'in one direction. 63) and 63 ', elastic means 65 and 65' for restoring the pistons 59 and 59 'moved by the refrigerant, and the refrigerant passing through the cylinders 57 and 57'. It characterized in that it consists of a solenoid valve 67, 67 'disposed in the guide tube (63) (63') so as to Intake shield of the indoor unit of an air conditioner that. According to claim 1, The actuating means (55) 55 'is inclined in a plurality of directions in accordance with the operation of the solenoid valves (67) (67') of the body 50 Inlet shielding device of the indoor unit of the air conditioner, characterized in that disposed on the upper and lower sides respectively.