JPH0422174Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention consists of a heat exchanger, a fan that supplies air from the suction port to the heat exchanger, and a fan that catches condensed water inside the main casing. This relates to a ceiling-embedded air conditioner in which a drain pan is installed inside the casing, a decorative panel having an air outlet is attached to the lower side of the casing, and air heat-exchanged by the heat exchanger is blown out from the air outlet. It is.

(Prior Art) Conventionally, this type of ceiling-embedded air conditioner is disclosed in, for example, Japanese Patent Laid-Open No. 110821/1982, and as shown in FIG. A heater element H is arranged in the space between the fan F arranged at the top and the heat exchanger B, and heats the air before passing through the heat exchanger B to obtain an auxiliary heat source during heating. I have to.

However, the above device heats the air before it passes through heat exchanger B, and is only used as an auxiliary heat source during heating, and is used as a reheater for controlling dehumidification during cooling. There was a problem that I couldn't do it.

Therefore, in order to use it not only as an auxiliary heat source during heating but also as a reheater during dehumidification control during cooling, the cooling air that has passed through heat exchanger B is reheated, and heat exchanger B Since it is necessary to condense and recover moisture from the air equivalent to the amount of cooling in heat exchanger B, as shown by the imaginary line in the figure,
Generally, a heater H' is placed on the outlet side of the heater.

In this case, heater H' is placed at a position corresponding to outlet C, which focuses exclusively on the air flow from heat exchanger B to outlet C, and is considered to have the most favorable air flow. It was something that would be done.

(Problem to be solved by the invention) By the way, in this type of ceiling-mounted air conditioner, due to equipment space constraints, the distance between the heat exchanger B and the air outlet C is narrow, and as mentioned above, the space between the heat exchanger B and the outlet C is narrow. , heater
When H′ is placed at the position corresponding to the air outlet C,
Since the heater H' is located above the opening of the air outlet C, there is a problem in that condensed water adhering to the heater H' falls into the room, causing great discomfort to the occupants. It was hot because it was happening.

That is, when the room temperature reaches a predetermined temperature according to a temperature sensor installed in the suction port A, etc., the operation is stopped and the heater H' is also turned off. As the temperature decreases, the heater
The saturated water vapor pressure of the air surrounding heater H' is rapidly reduced, causing dew condensation, and the condensed water adhering to heater H' falls into the room through outlet C. So it was hot.

This problem becomes especially noticeable when reheating for the purpose of dehumidification during cooling, since the indoor air already contains a lot of moisture, and every time the operation is stopped, condensed water is released into the room. It was hot because I ended up falling.

Moreover, in this type of ceiling-embedded air conditioner, the air outlet C is necessarily arranged to surround the air inlet A, so the air outlet C
The air blown from the air is returned to the suction port A without being widely circulated in the room, and the operation is stopped before the indoor temperature reaches the appropriate temperature, which is likely to cause the so-called short circuit problem. As the interval between operation stoppages becomes shorter, the problem of condensed water falling due to the operation stoppage occurs more frequently, and the heater H' frequently gets wet, resulting in poor insulation performance, etc. There were also difficulties in terms of protecting the heater.

The present invention was devised in view of the above-mentioned problems, and its purpose is to devise a space for arranging the heater element so that even if condensed water forms on the heater element, the condensed water can be removed. By placing the heater element in the space of the suction air passage, which is secured in order to catch the air on the drain pan and prevent it from flying out from the air outlet toward the indoor side, and at the same time to prevent damage to the short circuit, the device It is an object of the present invention to provide a ceiling-embedded air conditioner that can effectively utilize internal space and protect the heater element by reducing the frequency of condensation.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a heat exchanger 3 inside the main casing 1 and supplies suction air from the suction port 10 to the heat exchanger 3. A fan 4 for absorbing condensed water and a drain pan 5 for receiving condensed water are installed inside the casing 1, and a decorative panel 2 having air outlets 11 to 14 is attached to the lower side of the casing 1, and the heat exchanger is connected to the heat exchanger from the air outlets 11 to 14. The ceiling-embedded air conditioner is configured to blow out the air heat-exchanged in step 3, and the outlet openings 11 to 14 are located in corner spaces above the drain pan 5 where the longitudinal opening edges of the outlets 11 to 14 are adjacent to each other. A heater element 6 that heats the air that has passed through the heat exchanger 3 is disposed in a space that secures a passage for suction air to the suction port 10, and the condensed water that adheres to the heater element 6 is drained into the drain pan 5. It is characterized by the fact that it seems to be accepted.

(Function) In this way, the air supplied to the heat exchanger 3 from the suction port 10 comes into contact with the heater element 6 after passing through the heat exchanger 3, and is blown out indoors from the blow-off ports 11 to 14. be.

In this case, the heater element 6
Drain pans 5 whose longitudinal opening edges of ~14 are adjacent to each other
Since the condensed water is disposed in the corner space at the top of the heater element 6, even if dew condensation occurs on the heater element 6 due to a shutdown, the condensed water will drain away from the drain pan 5.
It will be received on top of the air outlet 11-1.
This can reliably prevent the item from falling into the room.

Further, the corner space is the heater element 6.
This is a space to catch the falling condensed water, and at the same time, it is a space that can secure a passage for the suction air taken into the suction port 10 and eliminate the adverse effects caused by the short circuit, making it possible to make the most of the equipment space. It is possible to improve the utilization of the heater element, eliminate the adverse effect of shortening the interval leading to the stoppage of operation, reduce the frequency of condensation on the heater element 6 due to the stoppage of operation, and protect the heater element 6 from condensation. You can also do it.

(Embodiments) Hereinafter, a ceiling-mounted air conditioner according to the present invention will be described with reference to embodiments shown in the drawings.

The ceiling-embedded air conditioner shown in FIGS. 1 and 2 includes a decorative panel 2 to which a ceiling surface P is attached on the lower side of a main body casing 1 having an approximately square shape. , a suction port 10 is provided, and four air outlets 11 to 14 are provided on four sides surrounding the suction port 10.

Inside the casing 1, the suction port 10 is provided.
A fan 4 is disposed facing the fan 4, and a U-shaped heat exchanger 3 is disposed around the fan 4, and the air sucked from the suction port 10 is heat exchanged with the heat exchanger 3. The air is then blown out from the air outlets 11 to 14.

A drain pan 5 is formed on the upper surface of the decorative panel 2 to receive condensed water from the air heat exchanged by the heat exchanger 3.
Inside is a control box 8 that houses various electrical components surrounding the power supply, an operation control device, etc.

Further, reference numeral 9 in the figure is a drain pump placed on the drain pan 5.

Therefore, in the ceiling-embedded air conditioner configured as above, the corner space a in the upper part of the drain pan 5 where the longitudinal opening edges of the air outlets 11 to 14 are adjacent to each other, The heater element 6 is disposed in a space that secures a passage for suction air.

The corner space a eliminates the occurrence of a short circuit in which the air blown from the air outlets 11 to 14 is immediately returned to the air inlet 10 on the lower side of the decorative panel 2, and This is to ensure that air of uniform temperature is taken into the suction port 10 in a good manner, and specifically,
The longitudinal length of each outlet 11 to 14 is set appropriately to ensure an air passage of a predetermined width toward the suction port 10 at mutually adjacent corners.

Further, as shown in the figure, for example, a PTC heater (semiconductor heater) having a large number of through holes penetrating the main body in the vertical and horizontal directions is used for the heater element 6, so that the air can be heated efficiently by the heater element 6. We are making it possible to do so.

Thus, the heat exchanger 3 is removed from the suction port 10.
The air supplied to the corner space a is heat-exchanged by the heat exchanger 3 and blown out in a spiral shape along the inner wall surface of the casing 1, and the air blown out to the corner space a comes into contact with the heater element 6. heated by
The air is blown out from the air outlets 11 to 14 toward the indoor side.

In this case, since the heater element 6 is disposed in the corner space a in the upper part of the drain pan 5 where the longitudinal opening edges of the air outlets 11 to 14 are adjacent to each other, the heater element 6 is Even if dew condensation occurs, the condensed water will be caught on the drain pan 5, and it can be reliably prevented from falling into the room from the air outlets 11-14.

Further, the corner space a is a space for receiving the falling condensed water from the heater element 6, and at the same time, it secures a passage for the suction air taken into the suction port 10, thereby eliminating the adverse effects caused by the short circuit. This makes it possible to make effective use of the equipment space, and also eliminates the negative effect of shortening the interval leading to the stoppage of operation, and reduces the frequency of condensation occurring on the heater element 6 due to the stoppage of operation. It is also possible to protect the heater element 6 from dew condensation.

(Effect of the invention) As described above, in the present invention, the heat exchanger 3 is provided inside the main casing 1, and the suction port 1 is provided in the heat exchanger 3.
A fan 4 that supplies suction air from 0 and a drain pan 5 that receives condensed water are installed inside the casing 1, and a decorative panel 2 having air outlets 11 to 14 is attached to the lower side of the casing 1. ~
The ceiling-embedded air conditioner is configured to blow out air heat-exchanged by the heat exchanger 3 from a corner at the upper part of the drain pan 5 where the longitudinal opening edges of the air outlets 11 to 14 are adjacent to each other. A heater element 6 that heats the air that has passed through the heat exchanger 3 is disposed in a space that secures a passage for suction air to the suction port 10, and prevents condensation that adheres to the heater element 6. Since the device is characterized in that water is received by the drain pan 5, even if dew condensation occurs on the heater element 6 due to a shutdown, the condensed water will be reliably deposited onto the drain pan 5. It is received and the air outlet 11~
14 and can be reliably prevented from falling into the room.

Moreover, the desired purpose was achieved by effectively utilizing the space that can secure a passage for the intake air taken into the suction port 10 and prevent the harmful effects caused by the short circuit. It is possible to eliminate the negative effect of shortening the interval leading to operation stoppage.
The frequency with which dew condensation occurs on the heater element 6 when the operation is stopped can be reduced, and the heater element 6 can also be protected from dew condensation.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a ceiling-embedded air conditioner according to the present invention, FIG. 2 is a vertical sectional view thereof, and FIG. 3 is a plan view of a conventional ceiling-embedded air conditioner. 1... Body casing, 2... Decorative panel, 3
... Heat exchanger, 4 ... Fan, 5 ... Drain pan, 6 ... Heater element, 10 ... Suction port,
11-14...Air outlet.

Claims (1)

[Scope of utility model registration request] Inside the main body casing 1, a heat exchanger 3, a fan 4 that supplies suction air from the suction port 10 to the heat exchanger 3, and a drain pan 5 that receives condensed water are installed. A decorative panel 2 having air outlets 11 to 14 is attached to the lower side, and the heat exchanger 3 is connected to the air outlet 11 to 14 from the air outlet 11 to 14.
This is a ceiling-embedded air conditioner that blows out heat-exchanged air, and the opening edges in the longitudinal direction of the air outlets 11 to 14 are located in a corner space in the upper part of the drain pan 5 adjacent to the air outlet 11 to 14. A heater element 6 that heats the air that has passed through the heat exchanger 3 is disposed in a space that secures a passage for suction air to the port 10, and the drain pan 5 receives the condensed water that adheres to the heater element 6. A ceiling-embedded air conditioner characterized by a shut-off feature.