ES2207662T3 - ELEVATION CONTROLLER OF AN AIR SUCTION GRILLE. - Google Patents

Abstract

THIS INVENTION IS RELATED TO AN AIR CONDITIONING APPLIANCE (50) OF THE ROOF MOUNTING TYPE THAT INCLUDES A OPERATION SWITCH (51) TO SWITCH THE POWER SUPPLY STATUS OF A POWER SUPPLY OF A LIFTING ENGINE (140 ) TO LIFT AN AIR SUCTION GRILLE (9); SOME DETECTORS OF THE POSITION OF THE SUPERIOR LIMIT (52, 53) TO DETECT THE POSITION OF THE LOWER LIMIT AND THE POSITION OF THE SUPERIOR LIMIT OF THE AIR SUCTION GRILLE (9) RESPECTIVELY; A PRESSURE LOCK DETECTOR TO DETECT THE PRESSURE LOCK OF THE AIR SUCTION GRILLE; A TIMER (143) FOR MEASURING THE DEFAULT TIME FROM THE OPERATION OF THE UPPER LIMIT POSITION DETECTOR (52); AND A CONTROLLER TO STOP THE LIFTING ENGINE (140) WHEN THE TIMER (143) COUNTED THE DEFAULT TIME AFTER THE AIR SUCTION GRILLE (9) REACH THE UPPER LIMIT POSITION AND HOLD THE AIR SUCTION GRID (9 ) TO BLOCK IT WHEN THE PRESSURE LOCK OF THE AIR SUCTION GRID IS DETECTED BY THE PRESSURE LOCK DETECTOR.

Description

One-rack elevator controller air intake

Background of the invention 1. Field of the invention

The present invention relates to a structure for mounting an air intake grille for a air conditioner of the ceiling mounted type, which has a ceiling mounted unit body, and a control system of the lift for the air intake grille medium.

2. Description of the technique related

A conditioner of roof mounted type air that has a face mounted panel on a roof, in which the face panel is provided with a air intake grille to suck air through it and it is provided with a filter in the middle of the intake grille of air (as described in the Japanese patent application Hei-2-233920 open for consultation at public). In this type of air conditioner, the filter detaches from the air intake grille peeling off the air intake grille means from the panel decor. Therefore, maintenance work such as detach a filter to clean the filter, replace the filter with a new one can be made more easily when compared to conventional types.

According to the type air conditioner Ceiling mounted described above, the face panel and The air intake grille means are mounted necessarily on the roof, and, in this way, a work to detach the air intake grille of the face panel in a high position. For this reason, although the job of detaching the filter is simplified, there is a situation in which the filter is barely changed to a new one or clean, so that the operation of operating the conditioner of air is continued without using sufficient performance of the air conditioner.

In order to avoid a situation like this, the air conditioner can be designed in such a way that the air intake grille means is supported on the lower surface of the face panel so as to be free to move up and down using a hoist engine. With this design, the air intake grille means can be moved down, from the ceiling to a lower position in a room for cleaning work to replace the filter, and, thus, this work can be performed in the position more low. However, this air conditioner design you need an operating system (control system) to raise (upward and downward displacement) the grid means of air intake. The operating system (control) must be designed to have not only a function of raising the air intake grille means, but also a function to stop the air intake grille means in any vertical direction position.

For example, in the case where the means of air intake grille is supported by several ropes of suspension or by a similar system, so that it can be freely displaced up and down, the problem that the air intake grille means is maintained inclined in its upper position (upper limit) due to imbalance of string lengths and occur some separation between the face panel and the grid means of air intake

In addition, in the case that several conditioners of air are mounted on the ceiling, it is required that several means of air intake grilles are moved down substantially simultaneously, however, with small time intervals between the means of suction grilles of air to exchange several new ones at the same time. In this case, when the air intake grille means are displaced down to check one of the grids means of air intake (referred to below as "means of white check grid "), the following may occur problem. That is, if any obstacle, such as furniture, by example a dresser, or a similar item is located under a air suction grille means that is different from the means of white check rack, this means of suction rack of air is actuated to move it down, even when it enters in contact with the obstacle as a user pays attention to the white check grid medium and thus does not press One stop key This displacement of the grid means of air aspiration is continued, and scrolling down (long) of the strings continues although the grid means of air intake that is coming into contact with the obstacle, It is necessarily stopped by the obstacle. For this reason, the strings are loosened and tangled, causing discomfort of the ascending displacement of the suction grille means.

Summary of the Invention

It has been achieved that the present invention exceeds the problems mentioned above, and a first objective of the present invention is to provide an air conditioner of the ceiling mounted type in which a grid means of air intake can be stopped in any position without there is a separation between a face panel and the means of air intake grill in the upper position (limit upper) of the air intake grille means, and in which it also prevents the suspension ropes to suspend the Air intake grille means loosen and tangle.

A second objective of the present invention is provide a ceiling mounted type air conditioner that can prevent an electric motor from continuously rotating in a overload, so that the operation of driving the motor in Overload can be reduced to a practical level.

A third objective of the present invention is provide a ceiling mounted type air conditioner in which an operating switch is prevented from being operated again once the operating switch is stopped, so a limit switch that prevents the loosened, which is operated by the switch operation does not act continuously.

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A fourth objective of the present invention is to provide a ceiling-mounted air conditioner in which a relay for driving an electric motor is preferably restarted (switched) at any time to prevent a power source from being short-circuited even

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A fifth objective of the present invention is provide a ceiling mounted type air conditioner in which a relay coil is prevented from carrying current when The air conditioner is stopped.

In order to achieve the aforementioned objectives in the foregoing, in accordance with a first aspect of this invention, a ceiling mounted type air conditioner, in which an air intake grille means is supported to move freely up and down by means of a lifting motor for the grid means of air intake, includes an operating switch that can switch a power supply status from a power supply to the lifting motor for the middle of air intake grille.

In the air conditioner of the type mounted on the ceiling as described above, the switch of operation comprises a traction switch type rotary, and the air intake grille means can perform series of repetitive displacements descending, stop, upward movement and stop, by this order.

The air conditioner of the type mounted on the roof as described above may also include means to stop the lifting motor drive when the downward displacement of the suction grille means of air necessarily stops during downward travel of the air intake grille means.

In the air conditioner of the type mounted on the ceiling as described above, the grid means of air aspiration may be supported by suspension ropes, and the start / rewind operation of the strings can be made by the rotational movement of the lifting motor, by means of which the air intake grille means is Scroll up and down.

The air conditioner of the type mounted on the roof as described above may also include stopping means to detect the looseness of the ropes and stop the movement of the lifting motor when the ropes of suspension are loosened during downward displacement of air intake grille medium.

The air conditioner of the type mounted on the roof as described above may also include timing means to continue the rewind operation of the suspension ropes for a predetermined time when the air intake grille means reaches its limit position higher.

In accordance with another aspect of this invention, a ceiling mounted air conditioner in which ends of the suspension ropes are affirmed to an air intake grille means, other ends of the suspension ropes are wrapped around pulleys, the pulleys are connected to a tree through a clutch which let the pulleys turn empty when a pulley is applied to load of more default, the tree is related to an engine electric to drive the air intake grille means, and the lifting motor is driven to perform the operation of start / rewind of the suspension ropes, whereby the air intake grille means moves up and down, comprises an operation switch to switch the power supply status of a power supply to the lifting motor, means to detect the limit position upper middle of air intake grille, a timer to count a predetermined time since the performance of the upper limit position sensing means, and means of control to stop the lift motor once the means of air intake grille reaches the upper limit position and The timer counts the default time.

The air conditioner of the type mounted on the roof as described above may also include a monitoring circuit to monitor a voltage of excitation of the lifting motor.

In the air conditioner of the type mounted on the roof, when the excitation voltage of the lifting motor, the which is detected by the monitoring circuit, is by above a predetermined value, the lift motor is stopped by the control means once the time elapses predetermined.

The air conditioner of the type mounted on the roof may also include a stop maintenance circuit to maintain the stop status of the grid means of air intake until the power switch is operated again operation, once the displacement of lifting of the air intake grille.

The air conditioner of the type mounted on the roof may also include a relay circuit comprising several relays and is adapted to control the displacement of Lifting of the lifting motor, and the relay circuit is equipped of a relay circuit to preferably reset a relay to drive the lift motor and reset, then the other relays once time has elapsed since the motor drive relay reset elevation.

The air conditioner of the type mounted on the roof may also include a relay circuit that comprises several relays and be adapted to control the displacement of Lifting the lifting motor, allowing all relays of the relay circuit are restored when the grid means air suction stop on top surface position upper limit.

Brief description of the drawings

Figure 1 is a longitudinal sectional view. which shows a first embodiment of an air conditioner of the type mounted on the ceiling according to the present invention;

Figure 2 is a perspective view that shows the air conditioner of the type mounted on the roof of the Figure 1;

Figure 3 is a plan view showing the air conditioner of the ceiling mounted type of figure 1 when an air intake grille means is detached of the same;

Figure 4A is a perspective view that shows the air conditioner of the type mounted on the roof of the Figure 1 when the air intake grille means is suspended therefrom, and Figure 4B is an enlarged view that shows a hook of the air intake grille means of the figure 4A;

Figure 5 is a flow chart showing a process flow of the first embodiment;

Figure 6 is a plan view showing a second embodiment of the mounted type air conditioner on the roof on which a sensor is provided to detect the laxity, and corresponds to figure 3;

Figure 7 is a diagram showing the medium of air intake grille of the second embodiment of the Figure 6 and peripheral equipment containing the detection sensor of laxity;

Figure 8 is a circuit diagram of a control circuit for a grille half lift motor of air intake in the mounted air conditioner on the ceiling of figure 1;

Figure 9 is a circuit diagram that shows an improved control circuit for the lift motor of air intake grille means of Figure 8;

Figures 10A and 10B are flow charts that show a scroll down operation and an operation upward displacement, respectively, of the middle of air intake grill;

Figure 11 is a functional diagram showing the operation of the controller control circuit of the figure 11; Y

Figure 12 is a functional diagram showing the operation of a relay drive circuit of the controller of figure 9.

Detailed description of the preferred embodiments

Preferred embodiments according to the The present invention will be described with reference to the drawings They accompany each other.

Figure 1 is a longitudinal sectional view. which shows a first embodiment of an air conditioner of the type mounted on the ceiling according to the present invention.

In figure 1, reference number 50 It represents an air conditioner. 50 air conditioner it has a unit body 2 that is formed of sheet metal and it is accommodated in a roof 1, and a face panel 7 which has a 3 port of suction of load in the center of the same and ports 4 extraction on all four sides on the peripheral part of the same, and is located on a ceiling face 6 such that cover a roof hole formed in the ceiling to mount the ceiling air conditioner.

In figure 1, reference number 10 represents an air blower comprising a turbo fan 11 and a fan motor 13 affirmed on a ceiling board 12; reference number 14 represents a nozzle port for guide the room air from the suction port 8 of charge up to the fan 11 turbo; and reference number 15 represents a rain vessel that has an internal part 15a raised and a raised external part 15b. The rain vessel is formed by foamy styrene and is designed in the form of a ring square. Reference number 16 represents an exchanger of heat of the plate fin type which is located on the side air discharge fan 11 turbo to surround the ring shaped fan. The reference number 17 represents a thermal insulator which is wrapped around the peripheral surface of unit body 2, number 21 of reference represents an air guide part to guide up to 4 air extraction ports, air has exchanged heat in the heat exchanger 16; reference number 22 represent the suspension bolts with which the unit body is suspended to the ceiling frame by suspension elements; and the reference number 24 represents a filter that is mounted on the downstream side of the air intake grille means 9.

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Next, the main part of this embodiment will be described with reference to Figures 2

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Figure 2 is a perspective view that shows a ceiling mounted type air conditioner shown in figure 1; Figure 3 is a plan view that shows the ceiling mounted air conditioner of Figure 1 when an air intake grille means is detached from the air conditioner; Figure 4A is a view in perspective showing the mounted type air conditioner on the ceiling when the air intake grille means is suspended from the air conditioner, and Figure 4B is a enlarged view showing a hook of the grid rack air intake The air intake grille means 9 is  supported by four suspension ropes 31 by the main body of the air conditioner in order to be scrollable up and down in vertical direction. Each one of the four suspension ropes 31 may be formed by a resin wire or metal wire around which it is applied a vinyl siding, however, it can be a quadrant rope As Figures 4A and 4B show, some ends 31a of the four suspension ropes 31 are fixed to hooks 90a of members 90 for reinforcing the grid means of air intake The other 31b ends of two ropes 31 of suspension of the four suspension ropes 31 are rolled around main pulleys 100A, and the other ends 31c of the other two suspension ropes 31 are wrapped around main pulleys 100B by means of rope guides 200 or pulleys auxiliary (not shown).

Fixing ends 31a of the ropes 31 suspension to hooks 90a of reinforcing members 90 of the air intake grille means can be realized folding in advance a connecting member 91 on the end 31a of each suspension rope 31, hooking a hook part 31d of the suspension rope 31 on the hook 90a and then stretching the suspension rope 31 in a direction indicated by a arrow and slightly loosening the rope 31.

Each of the members 90 of reinforcement of the medium Air intake grille is fixed to two sides of the middle of air intake grille 9 by screws or elements Similar. Therefore, the reinforcing members 90 of the means of air intake grille function as hooks for all four suspension ropes as described above, and also function to structurally reinforce the grid means 9 of air intake and prevent filter 24 (figure 1) mounted on the air intake face of the intake grille means 9 of air be displaced laterally.

Each pair formed by a 100A main pulley and a main 100B pulley (in total four pulleys 100A and 100B main), is linked to one of the two extreme parts of a tree 110 as shown in figure 3. On each of the pulleys A main hole 100A and 100B is formed, and the shaft 110 is inserted in these holes in such a way that the 100A poles and 100B main can rotate freely. That is, the pulleys 100A and 100B main are supported by tree 110 to rotate freely in a vacuum through the holes. In addition, the fixing elements 123 are fixed to tree parts of the tree 110 by means of several screws, and a means of transmitting the rotational force, such as a spiral spring, a spring of sheets, electromagnet or similar (referred to below as "spring spiral ") 130 is interposed between the elements 120 of fixing and the main pulleys 100A and 100B. The number 125 of reference, represents a ring that can rotate freely.

In a situation in which the deadlift of the grille means 9 for suction of air (or the force thereof) level) simply applies to the four suspension ropes 31, fixing elements 120, pulleys 100A and 100B are allowed main and rings 125 rotate integrally through spiral spring 130. Therefore, in this case, the operation The start / rewind of the four suspension ropes is carried to out in synchronization with the rotary movement of the tree 110. On the other hand, when a greater or excess load is applied to the four suspension ropes 31, pulleys 100A and Main 100B move in a vacuum opposing the elastic force of spiral spring 130.

In addition, according to this embodiment, a drive system 150 for raising the grid means 9 of air intake, that is, a drive system 150 that It contains the main pulleys 100A and 100B, the shaft 110, the clutch containing the force transmission medium rotary, a motor 140 to raise the grid means of air intake as described above, etc., are collectively arranged on a support plate 150 that extends into the opening part of the unit body 2 as is shown in figure 2.

As shown in Figure 3, plate 151 support is fixed on the face panel 7, and the system 150 of drive, as described above, is fixed to the side of face panel 7. In addition, a box 160 of electrical equipment to accommodate various electrical elements to control the air conditioner, is located to extend in the part opening of unit body 2 and to face plate 151 support. That is, the electrical equipment box 160 and the plate 151 support are arranged to extend in the opening part the which is considered as an air intake port of the unit body 2. The support plate 151 is located for extend into an area 190A while the equipment box 160 Electric is also located to extend into a 190B zone. Without However, the air conditioner is designed in such a way that the air intake function of the same do not be disturbed by the location of electrical equipment box 160 and plate 151 support, as described above, and you can take a breath in sufficient quantity as described above from the residual space The drive system 150 as described in the foregoing, it is fixed to the face panel 7, and the box 160 of electrical equipment is attached to unit body 2.

The drive system 150 will be described with more detail referring to figure 3.

The shaft 110 is mounted so that it can rotate freely by means of two bearings 152 on plate 151 support, and a gear 153 is fixed to the part substantially center of the tree part of the shaft 110. The gear 153 is coupled with a gear 154, and the gear 154 is fixed to the motor output shaft 140 to raise the grid means of air intake as described above. The number Reference 141 represents a capacitor for the motor, and the reference number 143 represents a timer (for correction) as described in the following.

A cord switch 51 (power switch operation) as shown in figure 2, is provided for perform the start-up and stop operation of the lifting displacement (upward displacement and descending) of the air intake grille means 9, and a sensor 52 for detecting the upper (upper) limit position and a sensor 53 for detecting the lower limit position (background) are provided as shown in figure 3. The sensor 53 of lower limit position detection detects the limit position bottom of the air intake grille means 9 depending on the long length of at least one suspension rope. Specifically, the long length of the suspension rope 31 it is detected based on the number of turns (height) of the rope 31 of suspension which is wrapped around the pulley 100B principal.

The operating switch is not limited. to the cord switch 51. For example, it can be a fixed type such Like a wall mounted guy. In this case, the type switch fixed can be connected to the lifting motor 140 by means of a cable. In addition, the operation switch may be Built as a remote controller or a remote controller to control the operation of the air conditioner.

Next, the operation will be described of the air conditioner of this embodiment by reference to the flow chart of figure 5.

For example, when a drawbar or similar is prepared and the cord switch 51 is pulled with the traction bar (a traction operation is carried out) (S1), the engine 140 to raise the air intake grille means it is turned forward to drive the drive system 150, and the air intake grille means 9 is started to scroll down by means of suspension ropes 31 (S2). Subsequently, when the traction operation of the cord switch 51 is carried out (S3) again, the downward displacement of the suction grille means 9 of Air is stopped (S4). Subsequently, when the operation of traction of the cord switch 51 is carried out (S5) again, the lifting motor 140 is rotated in the opposite direction, and the grille means 9 of air intake changes its movement to upward displacement (S6).

In this embodiment, a power switch is used. rotary type cord such as cord switch 51. When Repeatedly performs the switch traction operation of traction, the lifting motor 140 repeats the "rotation towards ahead "," stop "and" reverse rotation "in this order, and, thus, the air intake grille means 9 it also repeats a "downward shift", a "stop motion", an "upward shift" and a "stop motion", in this order. If in step S6 the grille means 9 of air intake reaches the limit position upper after the air intake grille means 9 change your movement to upward displacement, the sensor 52 for detecting the upper limit position. The same time, timer 143 is operated and after a period of determined time x seconds (for example, 0.3 to 2 seconds) (S7), the reverse rotation of the lifting motor 140 for the medium of air intake grille 9 stops, so that the upward displacement of the suction grille means 9 of Air is stopped (S8).

When the suction grille means 9 is hoisted of air towards the main body of the air conditioner by means of the four suspension ropes 31, the grid means 9 Air suction can be hoisted in an inclined position, in some cases because the four suspension ropes 31 do not They have the same length. However, according to this embodiment, even when the suction grille means 9 of air is hoisted while its position is tilted, the rotation reverse of the lift motor 140 stops once the default time (x seconds) elapses since the performance of the sensor 52 for detecting the upper limit position, and, of In this mode, the main pulleys 100A and 100B continue to rotate during the default time until all strings 31 of suspension are perfectly removed. That is, they follow picking up the four suspension ropes 31 until the middle of air intake grill 9 is held in a position horizontal and comes fully in contact with panel 7 of face. In this case, the main pulleys 100A and 100B around which some suspension ropes of the four ropes 31 of suspension have been collected march empty around the part tree from tree 110, until the other suspension ropes are perfectly collected.

During the downward displacement of the medium grid 9 air intake, downward travel the air intake grille means 9 stops (S4) pulling of the cord switch 51 as described above (S3), such that the air suction grille means 9 It can be temporarily stopped in any position. I don't know illustrated in figure 2, the filter 24 for cleaning the air (figure 1) it is mounted on the upper part of the grid means 9 of air aspiration, and, thus, the realization of various jobs such as replacement, cleaning, etc. about him filter 24 in a low position, displacing the grid means 9 of air intake from the roof side 6 down and stopping it temporarily in the course of its displacement falling.

Therefore, when compared to the case where these works were carried out in the high position, not only the works can be done more easily, but also Can enhance job security.

The air intake grille means 9 which scrolls up can be fixed to the face panel by means of blocking the suction grille means of air (not shown). However, the blocking means is not used in indispensable, and thus omitted from the illustration of this realization Referring to Figure 2, a magnet 43 it can be provided in the face panel 7 as a simple means for locking the air intake grille means for nozzle the air intake grille means 9 with force of origin magnetic.

In summary, according to this embodiment, the lift motor 140 is operated by pulling switch 51 of cord to rotate the shaft 110 and thus the pulleys 100A and 100B main that are related to tree 110 by clutch means, and the suspension ropes 31 that are wrapped around the main pulleys 100A and 100B are long or rewound, whereby the grid means 9 of Air intake is elevated automatically. Thus, when the air cleaning filter 24 is checked for its maintenance, this can be lowered and do maintenance on a low position (or in any position).

In addition, according to this embodiment, the medium air intake grille repeats the "displacement descending ", the" stop motion ", the "upward displacement" and "stop motion", in this order, by pulling the rotary cord switch, such that the air intake grille means can any position be stopped by a simple operation.

In addition, only one engine 140 of lift for the air intake grille means of this realization. Therefore, the budget of the air conditioner it can be more content, and this can be designed with a simpler structure with less operational problems compared to an air conditioner in which they are provided several lifting motors 140.

In addition, when a large load is applied to the medium of air intake grille, the clutches work to allow main pulleys 100A and 100B to run empty, thus preventing the lifting motor 140 from burning. In addition, even when the four suspension ropes 31 have unbalanced lengths during the rewind operation of the strings 31, the unbalanced condition of the length of the 31 suspension ropes can be absorbed lastly by gait in vacuum of the main pulleys 100A and 100B, so that the grid means 9 of air intake comes into perfect contact with the face panel 7 and, thus, no separation between them.

Next, another embodiment will be described. referring to figures 6 and 7.

In the embodiment shown in Figures 1 to 5, the lifting motor 140 for the suction grille means 9 of air is still actuated and, thus, the grid means 9 air intake does not stop somewhere midway during the downward displacement except that the grid means 9 of air intake reaches the lower limit position (for example, the position 2 m lower than the ceiling), or the switch 51 cord is pulled in the course of travel descending of the air intake grille means 9 for stop the air intake grille means during your downward displacement.

Consequently, if a piece of furniture, for example a chest of drawers 80 (see figure 7), is found as an obstacle by under an air intake grille means 9, the means of suction grille that continues its downward movement comes into contact with chest of drawers 80 and downward travel of the grille means 9 of air intake stops necessarily. However, the scrolling operation descending from the grid means 9 of continuous air intake unless an operator pays attention to the event and pulls the cord switch 51, such that the strings 31 of suspension are loosened. The suspension ropes 31 loosened may become entangled, causing upward displacement failure of the grille means 9 of air intake when the means of air intake grille 9 is required to move towards up again.

According to the embodiment of figures 6 and 7, a sensor 65 is recently provided to detect the looseness of the suspension ropes 31, when the ropes 31 of suspension are loose as indicated by a line dotted

When sensor 65 is activated, the operation of drive of the lifting motor 140 for the grid means of air aspiration stops. As shown in Figure 7, the sensor 65 has a spring 67, and the tip 67a of spring 67 is hooked to a suspension rope 31c. Normally spring 67 It is forced down as indicated by a dotted line. However, when the tip 67a is hooked on the rope 31c of suspension, spring 67 is forced up as indicated by a continuous line before the tension of the rope 31c of suspension. That is, the spring 67 is forced upwards in any moment by the tension of the suspension rope 31c. If the suspension rope 31c is loosened, the spring 67 is forced down, as indicated by the dotted line, by the spring force 67. In this case, for example, the point contact of a limit switch 69 is open, and the actuator of lifting motor 140 stops.

According to this embodiment, if the means of air intake grille 9 rests on a chest of drawers 80 (figure 7) and the suspension ropes 31 are loosened as indicated by the dotted line, the sensor 65 detects the looseness of the strings 31 of suspension to stop the drive of the engine 140 of lift for the grille means 9 of air intake. For the therefore, the air intake grille means 9 is prevented continue to scroll down, and thus prevent the suspension ropes 31 loosen and thus be entangled, so that security can be ensured for a operator during downward displacement of the grid means of air intake.

Figure 8 shows a control circuit for The lifting motor for the air intake grille means in the ceiling mounted type air conditioner. In the control circuit shown in figure 8, number 201 of reference represents a rotary switch connected to the operating switch; reference number 202 represents a relay drive power supply; the number 203 reference represents an upper limit switch that is corresponds to the limit position detection sensor 52 higher; reference number 204 represents a timer that corresponds to timer 143 as described in what precedes; reference number 206 represents a switch of lower limit corresponding to sensor 53 for detecting the lower limit position; reference number 207 represents a limit switch that detects the corresponding looseness with the slack detection sensor 65 as described in what precedes; reference number 208 represents a resistor regenerative (damping); the numbers 209, 210, 211 and 212 of reference represent relays; reference number 140 represents an engine to raise the air intake grille means (referred to in the following as "lifting engine"); the number Reference 214 represents a power supply of motor drive; reference number 214a represents a upload switch; and the reference number 214b represents a down switch

Next, the operation will be described of the operation of the control circuit shown in Figure 8.

When the grid means of air intake be moved up, switch 201 rotary is switched to upward scrolling status pulling the cord switch 51. Through this operation of switching of rotary switch 201, relay 209 is carried up to near its point of contact, subsequently relay 211 is leads to near its point of contact, and the switch 214a of rise closes to rotate the lift motor 140, whereby the air intake grille means 9 moves towards above. When the air intake grille means 9 is moves up to the upper limit position, the middle of air intake grille 9 closes limit switch 203 to turn on timer 204. After a while default from power supply to timer 204, Timer 204 supplies current to relay coil 205 to open the contact point of the same and stop the engine 140.

On the other hand, when the means of air intake grille be lowered, relays 210 and 212 are they make drivers successively, and the motor 140 is turned on the opposite direction it had during upward scrolling of the same. At this time, if the suction grille means 9 of air travels down to the lower limit position, the limit switch 7 opens and the motor 140 stops. By other side, if the air intake grille means 9 is supported on an object in the course of its downward movement, the looseness of the suspension ropes with which the means of grid is suspended is detected by switch 206 until stop the engine.

According to the air conditioner of the first and second embodiments as described above, if during the upward and downward displacement of the middle of air intake grille 9, limit switch 203 no works by failure or for another cause when the grid means 9 of air intake reaches the upper limit position, the engine 140 does not stop in this position and keeps rotating. Is a overload for motor 9 that the drive operation of the engine 140 continue for a period of time from the moment in that the air intake grille means 9 reaches the position upper limit until the motor drive operation 140 stops forcefully by timer 204. If engine 140 more than one predetermined time is activated (for example, 0.3 to 4.0 seconds), engine 140 may be out of order (problem one).

In addition, according to the air conditioner of the first and second embodiments as described in what above, during the downward movement of the grid means 9 air intake, switch contact points 206 and 207 may be closed due to vibration or a cause similar, because the operating range of these switches It is narrow. For example, when the suction grille means 9 of air stops because it rests on a person, the environment grille 9 air intake starts its movement descending if the person goes far enough from this position. However, if the person simply stops to avoid leaning against the air intake grille means 9, leans against the air intake grille again right after this action. Therefore, engine 140 repeats the operation on / off for a short time, and the operation repetitive engine on / off 140 causes deterioration of the engine 140 (problem 2).

Even more, according to the air conditioner of the first and second embodiments as described in what above, when the operation of the suction grille means of air is switched from the drive state to the status of stop, the short circuit current flows in the circuit due to the time delay between reset times (times switching) of the relays in the short circuit. For example, when the air intake grille means stops at the downward travel, relay 210 and relay 212 (214b) are switched (that is, relay 210 of Figure 8 is switched from the position indicated by dashed lines to the position indicated by continuous line, and switch 214b of descent is switched from the position indicated by lines discontinuous to the position indicated by continuous lines), whereby the motor 140 stops. There is a time delay in the shutdown time between these two relays 210 and 212 due to a manufacturing error or similar cause, and in turn, relays 210 and 212 can be kept simultaneously in the ON state. It is that is, there may be a situation in which relay 210 is in the position indicated by the continuous lines while the switch 214b down is in the position indicated by the Discontinue lines. Actually, as relay 212 has a time of reset greater than relay 210, current flows from the anode of power supply 214 by means of one of the switch contact points 214b, the point of contact of preferably reset relay 210 (switched), regenerative resistance 208 of approximately 0.5 Ω, the other contact point of the down switch 214b and the cathode of the power supply 214. The period of time for which the current flows, it is a very small value (approximately a few milliseconds), however, the amount of current is very large because the impedance of the circuit (the resistance of regenerative resistance 208, etc.) is very little. Therefore, said short circuit current has a great adverse effect on circuit elements (problem 3).

Even more, according to the air conditioner of the first and second embodiments as described in what above, current is still supplied to relay 205 even after that motor 140 be stopped by timer 204. If the relay 205 stays current for a long time, relay 205 is heats up due to an increase in coil temperature, which favors the abrasion of the contact points. In practical use, it is considered that the operator does not carry out the operation of switching once the air intake grille means It is contained in the air conditioner. In this case, you can allow current to pass through relay 5 for a long time period (from a few days to several months) until the medium air intake grille scroll down to clean the filter of the air intake grille (problem 4).

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Next, a third embodiment according to the present invention will be described which can solve problems 1 to 4 of the first and second embodiments as described in what

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Figure 9 shows a controller for the motor lifting for the air intake grille means in the ceiling mounted type air conditioner according to The present invention.

In figure 9, reference number 220 represents a rotary type cord switch, and the point of contact of the same is switched to "stop", "down", "stop" and "up", in this order every time it is pulled of the rotary type switch.

The controller includes a 225 circuit of control, and control circuit 225 receives input signals from rotary switch 220, a limit switch 221 upper, a lower limit switch 222, a switch 223 of looseness detection to detect the looseness of the strings of suspension, and a voltage sensing circuit 240 of engine operation, and supplies its output signal to the 229/234 relay drive circuits.

When the air intake grille means reaches the lower limit position during travel descending, the lower limit switch 222 works to stop the air intake grille means 9. On the other hand, when the air intake grille means 9 rests on a obstacle such as a comfortable or similar, and the strings 31 of suspension are loose in the course of displacement descending, the detection switch 223 works to stop the grid means 9 for air intake. In this embodiment, the control circuit 225 is also provided with a function of detection maintenance to maintain stopped status of the air intake grille means 9. With this function, the grille means 9 of air intake does not move unless actuate the rotary switch 220.

In addition, as described above, when the air intake grille means 9 rests against the upper limit switch 221 during travel ascending, the timer of control circuit 225 works to stop the air intake grille means 9 once After the default time.

In this embodiment, the controller is again provided with the voltage sensing circuit 240 of engine operation The voltage sensing circuit 240 of motor operation monitors the voltage when the motor is operated 140, and detects if the load current of the motor 140 is in the normal interval If the load current of the motor 140 exceeds a value (for example, 600 mA) which is determined by the nominal characteristics of the motor, the motor 140 stops. With this control operation of circuit 240 detecting the motor operating voltage, problem 2 of the embodiments First and second can be solved.

A 227 damping resistor (regenerative) is provided to prevent the motor 140 from rotating due to its dead weight of the air intake grille means 9 in the stopped state, and is connected to motor 140 in series when Engine 140 is stopped. Relay 228/223 serves to release the connection between damping resistor 227 and motor 140.

Before the control action of circuit 225 of control, the relay drive circuit 229/234 drives the relay 228/231 for upward displacement of the grid means 9 air intake, and relay 233/236 for displacement descending from the air intake grille means 9. A delay circuit is formed in drive circuit 229/234 relay to first separate relay 231 (231a) / 236 (236b) from damping resistor motor drive 227 (for example, separating the power supply 239 from the engine 140) and then excite relay 228/233 to connect the damping resistance 227 to motor 140 after receiving the relay contact input 228/233. Therefore, in the instant when motor 140 is stopped, relay 228/233 restarts with a delay of time since the separation of resistor 227 from damping of 231/236 motor drive relays. By consequently, the power supply 239 and the damping resistance 227 are shorted to each other, such that the problem (3) of the first and Second can be resolved.

In the embodiment described above, transistors 230/232 (for upward displacement) and 235/237 (for downward travel) are used to drive the relays; however, you can use another simple method that does not Use transistors.

In addition, in the embodiment described in what above, a power supply system is divided into two power supplies from power supply 226 to the control relay / circuit 226 and other power supply 239 It is used to drive the engine. This is because the engine load 140 varies greatly between the upward movement operation and the downward scrolling operation, so that the variation of the power supply voltage becomes large and, thus, it is impossible to configure a reference voltage to detect the operating voltage of the motor and also because the Operation of the control circuit 225 is stabilized.

The voltage sensing circuit 240 of motor operation begins by monitoring the elapsed voltage a predetermined time (for example, 50 to 300 ms) from the start of the rotation of the motor 140 such that the rapid current flowing at the moment the engine starts to Rotate is mistakenly detected as an overload.

Reference numbers 231a and 236b represent a rise switch and a down switch, respectively.

Next, the operation will be described of the controller of figure 9.

When the displacement of the grid means 9 air intake is changed from stop motion to downward displacement operating the rotary switch 220, the control circuit 225 operates the drive circuit 234 of the relay for downward displacement, to displace the medium of air intake grille 9 down if it is not supplied with an input from limit switch 222 bottom, slack detection switch 223 and circuit 240 detection of motor operating voltage. The circuit 234 relay drive for downward travel first turn on transistor 235 to drive relay 223. The relay 233 opens a contact point of the same to separate the resistance 227 damping motor 140, closes the other point of contact of the same. When an entry is repeated at the point of contact, the relay drive circuit 234 turns on the transistor 237 to drive relay 236. By means of this operation, the downstream switch 226b is closed, in such a way that the current flows from the right side to the left side in motor 140 as shown in figure 9 and the motor is rotated towards in front to move the air intake grille means 9 down.

When the lower limit switch 222 or the slack detection switch 223 is actuated to close the contact point of the same during the movement descending from the air intake grille means 9, the control circuit 225 stops the output to circuit 234 of relay drive. When the switch contact point 222/223 is open in the previous state, circuit 225 of control does not supply any output to circuit 234 of relay operation, such that the grid means 9 of Air aspiration remains stopped. Therefore, the problem (1) of the first and second embodiments may be resolved. Maintenance of the stopped state is released by operating the rotary switch 220.

When no output is supplied from the control circuit 225, relay control circuit 234 first deactivate transistor 237 to interrupt the flow of current in relay 236 and release relay 236b for the downward displacement, whereby the power supply to engine 140 is interrupted to stop engine 140. Subsequently, transistor 235 turns off after a time of 5 to 20 ms via the relay circuit to connect resistor 227 of damping and motor 140 each other.

When the switch contact point 220 rotary switches to the upward displacement state operating rotary switch 220, circuit 229 of Relay drive for upward displacement is operated to move the air intake grille means 9 towards above. The relay drive circuit 229 for the upward movement first turns on transistor 230 to operate relay 228. Relay 228 releases a contact point from the same to separate the damping resistor 227 from the motor 140 and close the other contact point of the same. When repeating one contact point input, drive circuit 234 of the relay turns on transistor 232 to power relay 231. With this operation, the up switch 231 is closed, such so that the current flows to the motor 140, from the left side to the right side in figure 9 to rotate the motor 140 of such so that the air intake grille means 9 moves down.

In the upward displacement of the middle of air intake grill 9, the current flows in the direction opposite to the downward displacement of the grid means 9 of air intake. The upward displacement of the middle of air intake grille 9 stops depending on the input from the upper limit switch 221 or the circuit 240 of motor operating voltage detection. Upon receiving this input, control circuit 225 stops its output to the circuit 229 relay operation after a predetermined time. When the input is stopped from the control circuit 225, the relay drive circuit 229 deactivates transistor 232 to cut off the current to relay 231. Through this operation, the up switch 231a opens and the power supply to the engine 140 is cut to stop rotation of engine 140. In this state, there is no relay to which current is supplied even when rotary switch 220 selects upward displacement of the air intake grille means 9. Therefore, the problem (4) of the first and second embodiments may be resolved. In order to move the grid means 9 down air intake, the rotary switch 220 is operated two times.

Figures 10A and 10B are flow charts that show the scroll down operation and an operation upward displacement, respectively, of the middle of air intake grill 9.

In the downward scrolling operation of Figure 10A, the rotary cord switch is switched to select the scrolling down (down ON) in the step 300, and in step 302 it is judged whether the limit switch 222 Descending is switched to ON. If limit switch 222 descending is not switched on, the process goes to the stage 304 to judge if the suspension ropes 31 are loose. If he switch 223 that prevents slackness is deemed not to be switched in the on position in step 304, the process goes to the stage 306. In step 306, relay 233 is switched on, and in the step 308 relay 236 is switched on. If one has elapsed default time of 100 milliseconds in step 309, the process goes to step 310. If a step 310 is detected motor overload by detection circuit 240, the process goes to step 318 after 4 seconds in step 312. By on the other hand, if in step 310 the detection circuit 240 does not detects any motor overload, the process goes to the stage 314. If in step 314 at least one of the switch 222 of lower limit and slack detection switch 223 is on, the process goes to step 318. On the other hand, if in the step 314 neither switch 222 nor switch 223 are turned on, the process goes to step 316. If switch 316 does not is off (i.e. on) the process returns to step 310. On the other hand, if the switch 220 is off in step 316, the relay 236 is off in step 318. After 20 ms in the step 320, the relay 233 is turned off in step 322 and the operation of Downward scrolling stops at step 324.

The upward scrolling operation (stage 400/424) of Figure 10B is substantially similar to the operation Scroll down except for operating elements, and Therefore, its description is omitted.

Figures 11 and 12 show the functions of operation performed in response to several input signals during the various operation operations of the means of air intake grille, and produce outputs from the same.

As described above, agree with the present invention, the power supply status to the lifting motor for the air intake grille means is Switch by changing the operation switch. Therefore the engine lifting is repeatedly subjected to rotation towards Forward / backward rotation according to the delivery status of energy, whereby the air intake grille means It can be raised and lowered. In addition, as the grid means of air suction can be stopped in any position by switching the operation switch, the grid means of air suction can be stopped in any suitable position in order to meet various conditions, for example, when requires that the air intake grille means be located in a lower place or not required not to be located in a lowest place according to the mounting position of the air conditioner. Therefore, work can be facilitated filter change, which is the final purpose of the operation described above.

In addition, the air intake grille means is supported by several suspension ropes in order to have freedom to move up and down. In this case, even when the air intake grille means is inclined in the upper limit position due to an imbalance in the lengths of the suspension ropes, the engine of lift remains on until the timer counts the time predetermined, and, thus, a pulley around which it is rolled up a shorter suspension rope moves in a vacuum in the upper limit time for this instant. Therefore, the winding operation of the continuous suspension ropes up to that a longer suspension rope coils perfectly around another pulley, so that the inclined position of the air intake grille means is corrected until the horizontal position, and there is no separation between the face panel and the air intake grille means in the upper limit position of the suction grille means of air.

In addition, as the suction grille means of air repeatedly forms the downward displacement, the stop motion, upward movement and movement stop, in this order, pulling the cord switch rotary, the air intake grille means can be stopped in any position by a simple operation.

Even more, when the suction grille means of air moving down rests on such an obstacle as a dresser or similar, and thus the displacement descending from it is necessarily stopped, the drive of the lifting motor stops and, thus, the means of air intake grille stops in this position, so which can ensure security. When the grid means of air aspiration is related to the suspension ropes, the looseness of the suspension ropes is detected in the course of the downward movement thereof to stop the subsequent drive of the lift motor. Therefore the air intake grille means still stopped in this position, and the suspension ropes are prevented from becoming entangled, by which can be achieved more security.

Even more, according to the air conditioner of the ceiling mounted type of the present invention, the circuit to monitor the operating voltage of the motor is provided to prevent the motor from continuing to rotate before an overload, of this way the motor overload drive can be reduced by main level In addition, the circuit that maintains the stop is provided in the control circuit to prevent the switch from limit that prevents loosening is automatically activated. For the so much, once the air intake grille means is stopped, remains detained in this position unless it is activated the operating switch again.

In addition, the delay circuit is provided in the relay drive circuit to reset preferably the motor drive relay, such that there is no short circuit in the circuit. Also, like the stop operation of the air intake grille means in the upper limit position is carried out by resetting the coil, not current flows in the coil when the grid means of air intake is stopped.

Claims (13)

1. An air conditioner (50) of the ceiling-mounted type in which an air intake grille (9) is supported so that it can be freely moved up and down by means of a grid lift motor (140) ( 9) air suction, characterized by including an operating switch (51) that can switch a current supply status from a power source (239) to the lifting motor (140) for the suction grid (9) of air. 2. The air conditioner (50) of the type mounted on the ceiling according to claim 1, wherein the said operating switch (51) comprises a rotary cord switch (220), and the aforementioned air intake grill (9) repeatedly performs a series of a downward movement, a stop motion, a upward scrolling and a stop motion through this order. 3. The air conditioner (50) of the type mounted on the ceiling according to claim 1, which further includes stopping means for stopping said motor drive (140) elevation when the downward displacement of the said air suction grille (9) necessarily stops during the downward movement of the grid (9) of air intake 4. The air conditioner (50) of the type mounted on the ceiling according to claim 1, wherein the mentioned air intake grille means (9) is supported by suspension ropes (31), and because the operation of start / rewind of the mentioned suspension ropes (31) is performed by rotating said motor (140) of elevation, whereby said grid means (9) of Air intake moves up and down. 5. The air conditioner (50) of the type mounted on the ceiling according to claim 4, which further includes stop means (65) for detecting the looseness of the ropes (31) of suspension and stop the engine displacement (140) of elevation when the mentioned suspension ropes (31) are loose during the downward movement of the grid mention (9) air intake. 6. The air conditioner (50) of the type mounted on the ceiling according to claim 4, which further includes timing means (143) to continue the operation of rewind of the mentioned suspension ropes (31) during a predetermined time when said suction grid (9) of air reaches its upper limit position. 7. The air conditioner of the type mounted on the roof according to claim 1, which further includes a circuit (240) monitoring to monitor a voltage of drive of said lifting motor (140). 8. The air conditioner (50) of the type mounted on the ceiling according to claim 7, wherein when the said drive voltage of said motor (140) of elevation, which is detected by said circuit (240) of monitoring, is above a predetermined value, the said lifting motor (140) stops after a default time 9. The air conditioner (50) of the type mounted on the ceiling according to claim 1, which further includes a stop maintenance circuit to maintain the status of stop the air intake grille (9) until the mentioned operation switch is operated again once the grid lift offset (9) of air aspiration stops. 10. The air conditioner (50) of the type mounted on the ceiling according to claim 1, which further includes a relay circuit (229, 234), which comprises several relays (228, 231, 236), and is adapted to control the displacement of lifting of said lifting motor (140), and the mentioned relay circuit (229, 234) is provided with a delay circuit to preferably reset a relay circuit (231, 236) for drive said lifting motor (140) and reset, to then the other relays (228, 233) after some time since the restoration of said relay (231, 236) of lifting motor drive. 11. The air conditioner (50) of the type mounted on the ceiling according to claim 1, which further includes a relay circuit (229, 234), which comprises several relays (228, 231, 233, 236), and is adapted to control the displacement of lifting of said lifting motor (140), allowing all the mentioned relays (228, 231, 233, 236) of the mentioned relay circuit (229, 234) be restored when the aforementioned air intake grill (9) is stopped in position upper limit. 12. The air conditioner (50) of the type ceiling mounted according to claim 1, which is mounted on the ceiling while it is embedded in the ceiling and is adapted to condition the room air by exchanging heat with the air in the room, which includes: some suspension ropes (31) that have about ends that are affirmed to the mentioned grid (9) of air intake; some pulleys (100A, 100B) around which the other ends of the mentioned suspension ropes (31) they are rolled up; a clutch for idling each of the mentioned pulleys (100A, 100B) when a load default or an extra load applies to the mentioned pulleys (100A, 100B); a tree (110) meshed with those mentioned pulleys by means of said clutch; in which the lifting motor (140) is meshed with the mentioned tree (110) and rotates the mentioned ones pulleys (100A, 100B) by means of a rotary movement thereof to start / rewind the mentioned suspension ropes (31) and elevates said air intake grill (9); an upper limit position detector (52) to detect the upper limit position of said grid (9) air intake; a timer (143) to count a time predetermined since the performance of said grid (52) of limit position; Y a controller to stop the mentioned engine (140) of lifting once said grid means (9) of air intake reaches the upper limit position and the mentioned timer (143) counts the predetermined time. 13. The air conditioner (50) of the ceiling mounted type according to claim 12, characterized in that said controller keeps said air intake grille (9) in stop when said air intake grille (9) is necessarily detained.