JPH0250043A - Air conditioner - Google Patents

Abstract

PURPOSE:To prevent effectively surrounding atmosphere from entering a room and improve an energy saving by a method wherein a blowing vane controlling means is provided, a blowing vane is set to be positioned in its downward directed attitude in cooperation with a door opening operation and then an air curtain is formed at an entrance of the room by a blown air stream got from an air blowing port. CONSTITUTION:When a door is opened as a person enters or comes out of a room, a door switch is turned ON, a clutch mechanism 16 is separated under an action of a cutting-off means 24, resulting in that a power transmitting path from a driving means 11 to a blowing vane 9 is separated and the blowing vane 9 is directed downwardly in its attitude under a biasing force of a spring 25. A fan motor is forcedly moved to its strongest operation under any operating conditions. Accordingly, entering of the surrounding atmosphere from an entrance is effectively prevented under an effect of air curtain generated by a blown air stream blown downwardly from an air blowing port 5 of an air conditioner with its maximum amount of air.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an air conditioner, and more particularly to an air conditioner having an air curtain function.

(Prior art and problems to be solved by the invention) Generally, when air-conditioning a room with a structure in which the door opens and closes when people enter and exit, such as in a store with a door, when the door opens and closes, There are problems in that the intrusion of outside air into the room impairs indoor comfort, and also increases the continuous operation time of the air conditioner, going against the trend toward energy conservation. Therefore, it has become an important concern to effectively prevent the outside air from entering when the door is opened, and various measures have been taken in the past.

For example, one method would be to install an air curtain device above the entrance of the room in addition to a regular air conditioner to prevent outside air from entering when the door is opened. Since it is necessary to install the air curtain device, there is a problem that the initial cost is high, and the operation of the air curtain device continues even when the door is closed, which goes against the trend toward energy conservation.

In addition, two air outlets that open downward and diagonally forward are installed on the wall side of the bottom surface of the casing so that one air conditioner can be used both for indoor air conditioning and for forming an air curtain for the room entrance. A structure having the same structure has already been proposed (see Japanese Utility Model Publication No. 54-33737).

However, in the case of the known example, since the structure is such that air is always blown out from the air outlet for forming an air curtain that opens downward, the amount of air provided for indoor air conditioning when the door is closed is The amount of air blown out from the downward air outlet tends to be insufficient, and it may not be possible to maintain a good indoor airflow distribution.

The present invention has been made in view of the above points, and an object of the present invention is to effectively prevent outside air from entering when the door is opened, thereby improving indoor comfort and energy saving. That is.

(Means for Solving the Problems) In order to solve the above problems, the present invention takes the following measures, which will be described below with reference to the accompanying drawings.

According to claim 1 of the present invention, the device is installed above the door D of the room R, has an air outlet 5 that opens downward, and the direction of the air flow from the air outlet 5 is directed from the downward direction. In an air conditioner having a blowing blade 9 that acts to change the direction diagonally to the rear, a door opening operation detecting means 3 detects an opening operation of the door D! and a blow-off vane control means 33 that acts to position the blow-off vane 9 in a downward position when the door is opened.

According to a second aspect of the present invention, in the air blowing machine according to the first aspect, the fan 3 is of a variable air volume type, and an air volume control means 32 is provided for controlling the air volume of the fan 3 to a maximum air volume when the door is opened. are doing.

Note that it is desirable to set the maximum air volume of the fan 3 to be larger than the strong air volume during normal air conditioning.

Furthermore, in a third aspect of the present invention, in the air conditioner according to the first aspect, the blowing blade control means 33 includes a drive means 11 for changing the direction of the blowing blade 9, and a driving means 11 for changing the direction of the blowing blade 9 so that the blowing blade 9 is always directed downward. A biasing means 25 for urging, and the driving means! 1 and an edge cutting means 24 for separating the power transmission path between the blower blade 9 and the blower blade 9, and the operation of the edge cutting means 24 is linked with the door opening operation.

(Function) In the present invention, the following effects can be obtained by the above means.

In the air conditioner according to claim I, a door opening operation detection means 31 for detecting an opening operation of the door D, and the blowing blade 9
By providing the blow-off vane control means 33 that acts to position the blow-off blade 9 in a downward position when the door is opened, the blow-off blade 9 is positioned in a downward position in conjunction with the door opening operation, and the air blown from the air blow-off port 5 is Entrance E of room R depending on the flow
This results in the formation of an air curtain. Therefore, intrusion of outside air from the entrance E when the door is opened is effectively prevented.

In the air conditioner according to the second aspect, the blowing blade 9 is directed downward in conjunction with the door opening operation by the action of the blowing blade control means 33, and the amount of air blown from the fan 3 is maximized, so that the air blowing outlet is Room R due to the air flow from 5
The prevention of outside air intrusion by the air curtain formed at the inlet E will be further strengthened. Note that the fan 3
If the maximum air volume is set to be larger than the strong air volume during normal air conditioning, the air curtain effect will be further increased.

In the air conditioner according to claim 3, the blowing blade control means 33 includes a driving means 11 for changing the direction of the blowing blade 9, and a biasing means 25 for always urging the blowing blade 9 in a downward attitude direction. , the edge cutting means 24 is configured to separate the power transmission path between the drive means 11 and the blowing blade 9, and the operation of the edge cutting means 24 is linked with the door opening operation, so that the opening operation of the door D is simultaneously performed. Edge cutting means 2
4, the power transmission path between the blowing blade 9 and the driving means 11 is disconnected, and the blowing blade 9 is immediately placed in a downward position by the action of the biasing means 25.

(Effects of the Invention) According to the present invention, excellent effects as described below can be obtained.

The air conditioner according to the first aspect of the present invention includes a door opening detection means 31 for detecting the opening operation of the door D, and an air blowing blade control means 33 that acts to position the blowing blades 9 in a downward position when the entire door is opened. Since the air blower blade 9 is positioned in a downward position in conjunction with the door opening operation, the air flow from the air outlet 5 reduces the population E of the room R.
An air curtain is formed in the door, effectively preventing outside air from entering through the entrance E when the door is opened, thereby greatly improving indoor comfort and energy saving.

Further, in the air conditioner according to claim 2, the blowing vane control means 3
3, the blowing blades 9 are placed in a downward position in conjunction with the door opening operation, and the air volume blown from the fan 3 is maximized. The prevention of outside air intrusion by the air curtain formed at the entrance E of R is further strengthened. In addition, as in claim 4, if the maximum air volume of the fan 9 is set to be larger than the strong air volume during normal air conditioning,
The air curtain effect will be further increased.

Furthermore, in the air conditioner according to claim 3, the blowing blade control means 33 includes a driving means 11 for changing the direction of the blowing blade 9, and a biasing means 25 for always urging the blowing blade 9 in a downward attitude direction. and an edge cutting means 24 for separating the power transmission path between the drive means 11 and the blowing blade 9, and the operation of the edge cutting means 24 is linked with the door opening operation, so that the edge cutting is performed simultaneously with the opening operation of the door D. The power transmission path between the blow-off blade 9 and the drive means 11 is separated by the operation of the means 24, and the blow-off blade 9 can be placed in a downward position immediately by the action of the biasing means 24, so that air conditioning can be achieved by a simple means. This allows the machine to have both a normal air conditioning function and an air curtain function.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The air conditioner A of this embodiment has a room R as shown in FIG.
It is a ceiling hanging type that is installed along a wall surface W above the population E of . The reference numeral indicates the door that opens and closes the entrance E.

The air conditioner A is constructed by disposing an air heat exchanger 2 and a centrifugal fan 3 in a thin rectangular casing l. The casing 1 has an air inlet 4 that opens forward on the front side, and an air outlet 5 that opens downward at the end of the lower surface on the wall surface W side.

The air heat exchanger 2 is disposed in the casing 1 in an oblique position toward the air suction port 4, and a drain pan 6 is installed below the air heat exchanger 2.

Further, the fan 3 is installed inside the air outlet 5, and its discharge lower faces the air outlet 5 in an inclined state toward the wall surface W side. In a space 8 formed between the discharge lower of the fan 3 and the air outlet 5, blowing vanes 9 for changing the direction of the blowing air flow are rotatably supported. By changing the angle of the blowing vanes 90, the direction of the blowing airflow is adjusted within a range of about 60 degrees from a downward blow indicated by the symbol F to an obliquely backward blow indicated by the symbol F'.

As shown in FIG. 2, the blowing vane 9 is attached by rotatably supporting its rotating shaft 9a to a bearing 10 provided in the casing 1.
The drive means 11 allows for reciprocating rotation within the rotation angle range described above. The driving means 11 includes a motor I2 and a first motor pivotally connected to a rotating shaft 12a of the motor 12.
a link 13; a second link 14 whose one end is rotatably connected to the tip of the first link 13; and a second link 14 which is rotatably and slidably connected to the other end of the second link 14 via a shaft 15. It consists of a swinging arm 18 integrally projecting from a pivot shaft 17 which is connected to and can be freely engaged with and disengaged from the rotation shaft 9a of the blow-off vane 9 via a clutch mechanism 16.
The rotational movement of the first link 13 caused by the drive of the second link 14 is converted into a reciprocating movement of the second link 14, and the reciprocating movement is transmitted through the swinging arm 18 as a reciprocating movement of the rotation shaft 9a. It has become so. Reference numeral 19 is a bearing for pivotally supporting the pivot 17.

The clutch mechanism 16 includes a convex portion 16a formed at the end of the rotation shaft 9a, and a pivot shaft! The convex portion 16a is located at the end of 7.
It consists of a recess 16b formed to engage and disengage the
By engaging and disengaging the convex portion 16a with the concave portion 16b, the power of the driving means 11 is transmitted/non-transmitted to the rotating shaft 9a of the blowing blade 9.

The pivot shaft 17' is moved forward and backward by a solenoid 20 which acts as an actuator for engaging and disengaging the clutch mechanism 16. That is, a movable element 22 having an arm 21 coupled to an end of the pivot shaft 17 is fitted into the solenoid 20, and the movable element 22 is drawn into the solenoid 20 by the excitation of the solenoid 20, and the The clutch mechanism 16 is disengaged by the pulling force. In addition,
When the solenoid 20 is in a non-energized state, the movable element 22 is moved by the biasing force of the return spring 23 in a direction to engage the clutch mechanism 16. That is, in this embodiment, the clutch mechanism 16 and the solenoid 20 constitute an edge cutting means 24 that separates the power transmission path between the blowing blade 9 and the driving means 11. Further, in this embodiment, the blowing blade 9 is biased so as to be directed downward by a spring 25 which acts as a biasing means. Reference numeral 26 is a stopper for maintaining the blowing blade 9 in a downward position. In the case of this embodiment, when the power transmission path between the blow-off blade 9 and the drive means ll is cut off by the action of the shutoff means 24, the blow-off blade 9 is immediately brought into a downward position by the biasing force of the spring 25. It has become.

In other words, in this embodiment, the blowing blade control means 33, which acts to direct the blowing blades 9 in a downward posture when the door D is opened, is constituted by the driving means 111, the urging means 25, and the edge cutting means 24. -ing

On the other hand, the fan 3 in this embodiment has an air volume of 3'B, which is switched between "strong, medium, and weak" during normal air conditioning operation, and a maximum air volume of 3'B, which is used for forming an air curtain.
It is configured so that four types of air volume control are possible, including the "strongest" air volume. In other words, the fan motor 27 that drives the fan 3, as shown in FIG. By selectively turning on these switching taps 28 to 30 and 32A, the corresponding air volume can be obtained.

Further, the door D is configured to be opened and closed automatically, and a door switch 31 is turned on when the door D is opened.
is attached.

As shown in the electrical circuit diagram of FIG. 3, in this embodiment, the solenoid 20 is connected in series with the door switch 31, and a relay 32 is connected in parallel with the solenoid 20.
is connected. And the normally open contact 32 of the relay 32
A constitutes the "strongest" switching tap of the fan motor 27, while the normally closed contact 32B of the relay 32 corresponds to the "strong, medium, weak" switching tap 28°29.30 of the fan motor 27. , 32b, and 32B are connected in series. With this configuration, the relay 32 acts as an air volume control means for making the air volume of the fan 3 the maximum air volume when the door D is opened. In addition, the fan motor 27 is set to "strong, medium, and weak".
In the case of an air conditioner that has only the three types of switching taps 2B, 29° and 30, connect the normally open contact 32A of the relay 32 in parallel with the "strong" switching tap 28, and set the "strong" air volume to the maximum air volume. Let's do it.

Next, the operation of the illustrated air conditioner will be explained.

When the door D of the room population E is in the closed state, the door switch 31 is in the OFF state, and the solenoid 20 and relay 32 are both in the de-energized state. Therefore,
The clutch mechanism 16 is in the engaged state, and the fan motor 27
has three switching taps 28, 29.3 for "strong, medium, and weak".
The air conditioner A is operated by selecting 0, and the air conditioner A is operated in a normal air conditioning operation. That is, the blowing blades 9 are rotated by the action of the driving means 11 so as to obtain blowing airflow F in the range of downward direction and diagonally backward direction, and the fan 3 is rotated in the range of "strong, medium, and weak". It is operated by switching between three types of air volume (see Figure 4).

When the door D is opened due to a person entering or leaving the room R, the door switch 31 is turned ON, and the solenoid 2
0 and relay 32 are both excited. Then, the clutch mechanism 16 is separated by the action of the edge cutting means 24, and the power transmission path from the drive means [1 to the blowing blade 9 is cut off, and the blowing blade 9 is placed in a downward position by the biasing force of the spring 25. On the other hand, due to the excitation of the relay 32, its normally open contact 32A is closed, and at the same time, its normally closed contacts 32B and 3213.32B are opened, so that the fan motor 27 is forced to operate in any operating state. It will be shifted to "strongest" driving mode. Therefore,
From the air outlet 5 to the air conditioner, a downward air flow F
' is blown out, and as shown in Fig. 5, the intrusion of outside air from the inlet E is effectively prevented by the air curtain effect caused by the blown air flow F' blown downward at the maximum air volume. That's what happens.

As described above, according to this embodiment, when the door D is opened, the air flow F' blown out from the air outlet 5 of the air conditioner A reaches its maximum air volume in the downward direction. This effectively prevents outside air from entering due to the air curtain effect at E.

It goes without saying that the present invention is not limited to the configuration of the above-described embodiments, and that the design can be changed as appropriate without departing from the gist of the invention.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view schematically showing an air conditioner according to an embodiment of the present invention, FIG. 2 is a perspective view showing the blowing vane and its drive system in the air conditioner shown in FIG. 1, and FIG. 1 is an electric circuit diagram of the air conditioner shown in FIG. 1, and FIGS. 4 and 5 are schematic diagrams showing the direction of the blown air flow when the door is opened and when the door is closed. 30... 5... 91 battle 1. 11... 240... 25... 3... 32...e... D...・E・1...R...Fist... ・Fan・Air outlet・1 blowout blade・Drive means・Edge cutting means・Spring・Door switch・Relay・Door・Entrance・Room

Claims (1)

[Claims] 1. It is installed above the door (D) of the room (R), has an air outlet (5) that opens downward, and has an air outlet (5) that opens downward; A blowing blade (9) that acts to change the direction of the blowing air flow from downward to diagonally inward.
In the air conditioner, the air conditioner has a door opening operation detection means (31) that detects an opening operation of the door (D), and an air blowing blade control that operates to position the air blowing blade (9) in a downward position when the door is opened. An air conditioner characterized in that a means (33) is attached. 2. In the air conditioner according to claim 1, the fan (
3) is of a variable air volume type, and the air volume control means (3) makes the air volume of the fan (3) a maximum air volume when the door is opened.
An air conditioner characterized by being equipped with 2). 3. In the air conditioner according to claim 1, the blowing vane control means (33) includes a driving means (11) for changing the direction of the blowing vane (9), and a driving means (11) for changing the direction of the blowing vane (9), and the blowing vane (9) is always in a downward position. It is composed of a biasing means (25) that biases in the direction, and an edge cutting means (24) that separates the power transmission path between the drive means (11) and the blowing blade (9), and the edge cutting means (24) An air conditioner 4 according to claim 2, characterized in that the operation and the opening operation of the door (D) are linked to each other, and the air conditioner according to claim 2, wherein the maximum air volume of the fan (3) is set to a strong wind during normal air conditioning. An air conditioner characterized in that the setting is larger than the amount.