JP3034287U - Indoor unit of air conditioner - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To prevent a short circuit by limiting the attraction of the suction port. A casing (1) has a suction port (2) formed at a central portion of a front face (1a) thereof, and a blow port (3) formed at a lower portion of the front face (1a), and a fan (6) provided in the casing (1) drives the casing. Casing 1 through suction port 2
In the indoor unit of the air conditioner in which the suction flow a is sucked in and the discharge flow b is blown out of the casing 1 through the blowout port 3, the suction port 2 of the front surface 1a of the casing 1 A short circuit preventing groove 8 is provided between the air outlet 3 and the air outlet 3.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an air conditioner indoor unit having a short circuit prevention function.

[0002]

[Prior art]

 Conventionally, as an example of an indoor unit of this type of air conditioner, there is one shown in FIG. This is a grill having a suction port 2 formed at the center of the front surface 1a of a casing 1, a blowout port 3 formed at the lower portion of the front surface 1a, and a large number of horizontal rails 4a in the suction port 2. 4 are provided, the inside of the suction port 2 is partitioned into a plurality of gaps 2a by the horizontal rails 4a, and a heat exchanger 5 and a fan 6 are provided in the casing 1.

In the above structure, by driving the fan 6, the suction flow a sucked into the casing 1 through the suction port 2 is heat-exchanged by the heat exchanger 5, and the blowout flow b is generated from the casing 1. It is blown out into the room through the air outlet 3.

In the above configuration, since the suction port 2 and the blowout port 3 are formed close to each other, a part of the blowout flow b blown out from the blowout port 3 becomes the drawflow c due to the attraction action of the suction port 2. As a result, the so-called short circuit is likely to be generated by being sucked into the suction port 2 along the front surface 1a of the casing 1.

Conventionally, there is a technique described in Japanese Utility Model Laid-Open No. 3-11622 as a technique for preventing a short circuit. This is one in which each horizontal rail 4a of the grill 4 is inclined forward and upward, and a rising portion is formed at the front end portion of each horizontal rail 4a, and the suction flow direction of the suction flow a is directed obliquely downward. It is designed so that the attraction to b is not generated.

[0006]

In the above-described conventional configuration, the shape of the horizontal rail 4a in the suction port 2 is only slightly changed, and the attraction action of the suction port 2 is not limited, so that the short circuit is prevented. The prevention function is low.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an indoor unit of an air conditioner that can prevent a short circuit by limiting the attraction of the suction port.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, a device according to claim 1 has a suction port formed at a central portion of a front surface of a casing, and an outlet port formed at a lower portion of the front surface, and a fan installed in the casing. In the indoor unit of the air conditioner in which the suction flow is sucked into the casing through the suction port by driving, and the discharge flow is blown out to the outside of the casing through the air outlet, The feature is that a short circuit preventing means is provided between the suction port and the air outlet.

According to the above configuration, by driving the fan, the suction flow is sucked into the casing through the suction port, and the blowout flow is blown out from the casing through the blowout port. Part of the blowout flow becomes a drawflow and tends to be sucked into the suction port along the front surface of the casing, but a short-circuit provided between the suction port and the blowout port on the front surface of the casing. Since the induced flow is disturbed by the circuit prevention means, it is possible to prevent the short circuit by limiting the attracting action of the suction port.

According to a second aspect of the present invention, in the first aspect of the invention, the short circuit preventing means is a concave groove formed along the suction port on the front surface of the casing.

According to the above configuration, the induced flow enters the concave groove and becomes a turbulent flow, and the induced flow is disturbed by the turbulent flow. Therefore, the attracting action of the suction port is limited to prevent the short circuit. You can

According to a third aspect of the present invention, in the second aspect of the invention, the groove is formed over substantially the entire length of the suction port.

According to the above configuration, the attraction action can be limited by the concave groove over substantially the entire length of the suction port.

According to a fourth aspect of the present invention, in the third aspect of the invention, a grill having a large number of horizontal bars is provided in the suction port, and the width of the groove is substantially the same as the interval between the horizontal bars. It is characterized by being set.

According to the above configuration, since the recessed groove is formed in substantially the same shape as the gap partitioned by the horizontal rails of the suction port, the recessed groove is integrated with the suction port to give an appearance. It is good.

A fifth aspect of the present invention is the device according to any of the second to fourth aspects, characterized in that the inner peripheral surface of the concave groove is formed in an arc shape.

According to the above configuration, the induced flow that has entered the concave groove is smoothly changed in direction along the arc-shaped inner peripheral surface of the concave groove to become a turbulent flow, and the turbulent flow also enters the concave groove. Since the attracting flow is disturbed by the attempted attracting flow, the attracting action of the suction port can be further limited.

According to a sixth aspect of the invention, in the first aspect of the invention, the short circuit preventing means comprises a ridge formed on the front surface of the casing along the suction port. .

According to the above configuration, a part of the blowout flow becomes an induced flow and tends to be sucked into the suction port along the front surface of the casing. However, the induced flow hits the ridge and becomes a turbulent flow. Since the attracting flow is disturbed by the flow, it is possible to prevent the short circuit by limiting the attracting action of the suction port.

A seventh aspect of the present invention is the device of the sixth aspect, characterized in that the protrusion is formed over substantially the entire length of the suction port.

According to the above configuration, the attraction action of the suction port can be limited over substantially the entire length of the suction port.

[0022]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 show an indoor unit of an air conditioner which is a first embodiment of the present invention, in which a front surface 1a of a casing 1 is provided between an inlet 2 and an outlet 3 thereof. One or a plurality of recessed grooves (short circuit preventing means) 8 are provided along the suction port 2 as shown. Since the configuration other than the above is almost the same as the conventional example shown in FIG.

According to the above configuration, by driving the fan 6, the suction flow a is sucked into the casing 1 through the suction port 2 to be cooled or heated by the heat exchanger 5, and at the same time, the casing. The cooled or heated blowout flow b is blown out from the inside of 1 through the blowout port 3, and a part of the blowout flow b becomes a draw flow c by the attracting action of the suction port 2 to the front of the casing 1. Although it is about to be sucked into the suction port 2 along with it, as shown in FIG. 3, the induced flow c enters the concave groove 8 to become a turbulent flow d, and the turbulent flow d disturbs the induced flow c. It is possible to prevent the short circuit by limiting the attracting action of the suction port 2.

Further, the V-shaped portion 1 b forming the concave groove 8 of the casing 1 can increase the torsional strength of the casing 1.

As shown in FIG. 2, the concave groove 8 is formed to have a length H that extends over substantially the entire length of the suction port 2.

According to the above configuration, the concave groove 8 can limit the attracting action over substantially the entire length of the suction port 2.

Further, as shown in FIG. 2, the width R of the groove 8 is set to be substantially the same as the interval r between the horizontal rails 4a.

According to the above configuration, since the concave groove 8 is formed in substantially the same shape as the gap 2 a partitioned by the horizontal bars 4 a in the suction port 2, the concave groove 8 is integrated with the suction port 2. The appearance is good and the appearance is good.

In the above embodiment, the inner peripheral surface 8a of the concave groove 8 is formed in a substantially V shape as shown in FIG. 3. However, as shown in FIG. 4, the inner peripheral surface 8a of the concave groove 8 is formed. May be formed in an arc shape (second embodiment).

According to the above configuration, the induced flow c that has entered the concave groove 8 is smoothly changed in direction along the arcuate inner peripheral surface 8a of the concave groove 8 to become the turbulent flow d, and the turbulent flow d Since the attracted flow c that is trying to enter the concave groove 8 is disturbed, the attracting action of the suction port 2 can be further restricted.

FIG. 5 shows a third embodiment of the present invention. Between the inlet 2 and the outlet 3 of the front surface 1 a of the casing 1, one is provided along the inlet 2. Alternatively, as shown in the figure, a plurality of convex portions (short circuit preventing means) 10 are provided.

According to the above configuration, a part of the blowout flow b becomes the induced flow c and tends to be sucked into the suction port 2 along the front surface 1 a of the casing 1. The turbulent flow d hits 10 and the attracting flow c is disturbed by the turbulent d, so that the attracting action of the suction port 2 can be limited to prevent a short circuit.

The ridge portion 10 is formed to have a length substantially over the entire length of the suction port 2, and the attracting action can be limited over the substantially entire length of the suction port 2.

[0034]

[Effect of the invention]

 According to the first aspect of the present invention, the suction action of the suction port causes a part of the blowout flow to be a suction flow, which tends to be sucked into the suction port along the front face of the casing. Since the induced flow is disturbed by the short circuit prevention means provided between the suction port and the air outlet, it is possible to prevent the short circuit by limiting the attraction action of the suction port.

According to the second aspect of the invention, the induced flow enters the concave groove formed along the suction port on the front surface of the casing to become a turbulent flow, and the turbulent flow disturbs the induced flow. A short circuit can be prevented by limiting the attracting action of the suction port.

According to the invention as set forth in claim 3, since the concave groove is formed over substantially the entire length of the suction port, the attraction action of the suction port can be limited over substantially the entire length thereof.

According to the invention as set forth in claim 4, since the recessed groove is formed in substantially the same shape as the gap partitioned by the respective horizontal rails of the suction port, the recessed groove is integrated with the suction port and the appearance is improved. The appearance is good.

According to the invention of claim 5, the induced flow that has entered the concave groove is smoothly changed in direction along the arcuate inner peripheral surface of the concave groove to become a turbulent flow, and the turbulent flow is When the attracting flow that tries to enter the groove is disturbed, the attracting action of the suction port can be further limited.

According to the invention as set forth in claim 6, the attracting flow hits the ridge and becomes a turbulent flow, and the attracting flow is disturbed by the turbulent flow. Therefore, the attracting action of the suction port is limited and the short circuit is prevented. Can be prevented.

According to the invention as set forth in claim 7, since the ridge portion is formed over substantially the entire length of the suction port, the attraction action of the suction port can be limited over substantially the entire length thereof.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing an indoor unit of an air conditioner according to a first embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is an enlarged sectional view of the main part.

FIG. 4 is an enlarged cross-sectional view of essential parts showing an indoor unit of an air conditioner according to a second embodiment of the present invention.

FIG. 5 is an enlarged cross-sectional view of essential parts showing an indoor unit of an air conditioner according to a third embodiment of the present invention.

FIG. 6 is a partially cutaway side view showing a conventional example.

[Explanation of symbols]

 1 Casing 1a Front of casing 2 Suction port 3 Blow-out port 6 Fan 8 Recessed groove (short circuit prevention means) R Width of recessed groove r Distance between horizontal rails 10 Convex ridges (short circuit prevention means) a Suction flow b Outflow c inducement

Claims (7)

[Utility model registration claims] 1. A suction opening is formed in the center of the front surface of the casing, and an air outlet is formed in the lower portion of the front surface,
The interior of the air conditioner in which the suction flow is sucked into the casing through the suction port by driving the fan provided in the casing and the discharge flow is blown out of the casing through the air outlet. In the unit, an indoor unit of an air conditioner, characterized in that short circuit prevention means is provided between the suction port and the air outlet on the front surface of the casing. 2. The indoor unit for an air conditioner according to claim 1, wherein the short circuit prevention means is a concave groove formed on the front surface of the casing along the suction port. 3. The indoor unit for an air conditioner according to claim 2, wherein the concave groove is formed over substantially the entire length of the suction port. 4. The grill having a large number of horizontal rails is provided in the suction port, and the width of the recessed groove is set to be substantially the same as the interval between the horizontal rails. Indoor unit of air conditioner. 5. The indoor unit for an air conditioner according to claim 2, wherein an inner peripheral surface of the groove is formed in an arc shape. 6. The indoor unit for an air conditioner according to claim 1, wherein the short circuit prevention means is a ridge formed on the front surface of the casing along the suction port. 7. The indoor unit for an air conditioner according to claim 6, wherein the protruding portion is formed over substantially the entire length of the suction port.