JP3507601B2 - Ceiling-mounted air conditioner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a suction grille of a ceiling-mounted air conditioner having a unit main body installed on a ceiling. 2. Description of the Related Art In general, there is known a ceiling-mounted air conditioner in which a suction grill is provided on a decorative panel installed on a ceiling, and a filter is provided on the suction grill (Japanese Patent Laid-Open No. 2-2339).
No. 20). This type has an advantage that the filter can be removed by removing the suction grille from the decorative panel, so that the operation of attaching and detaching the filter at the time of cleaning the filter is simplified as compared with the previous one. . [0003] However, in the ceiling-mounted type air conditioner, the decorative panel and the suction grill are naturally installed on the ceiling. Therefore, even if the attachment and detachment of the filter is simplified, there is a problem that the filter is not replaced very often, and a situation occurs in which the operation is continued without sufficiently exerting the performance of the air conditioner. . In order to solve this problem, it is conceivable to support the suction grille on the lower surface of the decorative panel using a motor for raising and lowering so as to be able to move up and down. Then, when replacing the filter, the suction grill can be lowered to a low place, so that the filter can be replaced in a low place. In the case of the above configuration, an operation system for lifting and lowering the suction grill is required, but this operation system must be one that can stop the suction grill at an arbitrary position. In the case where the suction grille is supported by a plurality of suspension strings so as to be able to move up and down, due to the imbalance in the length of the suspension strings, the suction grille remains inclined at the upper limit position of the suction grille, and the makeup panel and There is a possibility that a gap is formed between the suction grill and the suction grill. In a case where a plurality of air conditioners are installed on a ceiling, a plurality of suction grills are lowered almost simultaneously with a time lag, and a plurality of filters are simultaneously replaced. There is. In such a case, for example, if furniture (commodity) or the like as an obstacle is located immediately below one of the suction grills, this suction grill continues to descend while another suction grill is being lowered. The furniture (tansu) underneath will be forcibly stopped. If the operator continues to lower the suction grille without noticing it, the sling slackens and it becomes entangled,
When trying to raise again, there arises a problem that it cannot be raised. Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, to stop the suction grill at an arbitrary position, and to set the decorative panel and the suction panel at the upper limit position of the suction grill. It is an object of the present invention to provide a ceiling-embedded air conditioner in which no gap is formed between the air conditioner and the grill, and furthermore, a slack or the like does not occur in a suspension string connected to the suction grill. According to the first aspect of the present invention, one end of a hanging string is fixed to a suction grill, and the hanging string is
Wrap the other end around a pulley, and apply a load
In this case, it is connected to the shaft via the idle clutch
Then, the suction grill elevating motor is connected to this shaft,
Activate this lifting motor to pay out the hanging string.
/ Rewind, replace filter, clean, etc.
Ceiling to lower or raise the suction grille
In the embedded type air conditioner, the suction grill may be the optional one.
Slack of the suspension string when it starts to descend toward the position
And a sensor for detecting
Means for stopping the suction grill elevating motor, and the suction
Upper limit position of the suction grill when the grill turns up
Upper limit position detecting means for detecting the
A timer that counts a predetermined time after the position detecting means operates.
And the suction grill rises to the upper limit position,
After the timer has counted a predetermined time, the suction grill
Control means for stopping the elevating motor . According to the present invention, the suction grille is supported by a plurality of suspending strings so as to be able to move up and down freely. Even if the suction grill is tilted at the upper limit position of the suction grill due to the imbalance of the suction grill, the elevating motor continues to operate until the timer counts a predetermined time. The winding of the suspension string is continued until the long suspension string is completely wound, such as when the wound pulley idles at the upper limit position, so that the inclination of the suction grill is eliminated and the makeup There is no gap between the panel and the suction grill. Further , when the suction grille embedded in the ceiling descends and hits an obstacle such as a chest, for example, and the lowering operation of the suction grille is forcibly stopped, the lifting grille is used. Since the operation of the motor is stopped, the suspension string does not slack any more, the suspension string does not become entangled, and the suction grill stops at that location, thereby ensuring safety. An embodiment of the present invention will be described below with reference to the drawings. FIG. 4 is a longitudinal sectional view of a general ceiling-mounted air conditioner. In FIG. 4, reference numeral 50 indicates an air conditioner. This air conditioner 50 has
A decorative panel 7 provided on a ceiling surface 6 so as to have a suction port 3 in the center and air outlets 4 on four sides of an outer periphery and to cover a ceiling hole 5, And an intake grille 9 having an intake port 8. Reference numeral 10 denotes a blower including a turbo fan 11 and a fan motor 13 mounted on a top plate 12, reference numeral 14 denotes a nozzle port for guiding room air from the intake port 8 to the turbo fan 11, and reference numeral 15 denotes an inner rising portion 15a. And an outer rising portion 15b, and a drain pan made of styrene foam in an angular ring shape. A plate fin type heat exchanger 16 is annularly arranged on the discharge side of the turbo fan 11 so as to surround the fan. is there. Reference numeral 17 denotes a heat insulating material wound around the peripheral surface of the unit body 2, reference numeral 21 denotes a baffle for guiding the air exchanged by the heat exchanger 16 to the outlet 4, 22.
Is a suspension bolt for suspending the unit body 2 from the ceiling beam with a suspending tool, and 24 is a filter attached to the downstream side of the suction grill 9. Referring to FIGS. 1 to 3, the main part of the present embodiment will be described. The suction grille 9 is supported via four suspension strings 31 so as to be able to move up and down. These four hanging strings 31
Is a resin wire or a metal wire having a vinyl coating on the outer periphery, but may be a dial code. As shown in FIG. 3, one end 31a of each of the four suspension strings 31 is connected to a hook 90 of the suction grill reinforcing member 90.
a, two of the four suspension strings 31
1 is wound around the main pulley 100A, respectively.
The other ends 31c of the remaining two suspension strings 31 are respectively wound around the main pulley 100B via the rope guide 200 or an auxiliary pulley (not shown). In order to connect one end 31a of the hanging string 31 to the hook 90a of the suction grill reinforcing member 90, as shown in FIG. Hook part 31d with hook 90
After hooking on a, the hanging string 31 may be pulled in the direction of the arrow and lightly tightened. The suction grill reinforcing member 90 is fixed to two sides of the suction grill 9 by screws or the like, and, as described above, functions as a hook for the four suspension strings 31.
It also serves to reinforce the suction grille 9 and to prevent the filter 24 (FIG. 4) mounted on the suction surface of the suction grille 9 from laterally shifting. A total of four main pulleys 100A, 100B
As shown in FIG. 2, each pair is connected to both ends of the shaft 110 one by one. A hole is formed in each of the main pulleys 100A and 100B.
A and 100B are loosely fitted to the shaft 110 so as to freely rotate. A fixed portion 120 is fixed to the shaft portion of the shaft 110 via a plurality of screws or the like, and a rotational force transmitting means (such as a coil spring, a plate spring, or an electromagnet) is provided between the fixed portion 120 and the main pulleys 100A and 100B. Hereinafter, it is referred to as “coil spring”.) 130 is interposed. Reference numeral 125 denotes a ring that rotates freely. When the weight of the suction grill 9 is applied to the four suspension strings 31 by the coil spring 130, the fixing part 12 is free to rotate.
0, the main pulleys 100A and 100B, and the ring 125 are integrated, and as the shaft 110 rotates, the four suspension strings 31 are paid out / rewinded. Then
When an excessive load is applied to the four suspension strings 31, the main pulleys 100 </ b> A, 10 </ b> A resist the spring force of the coil spring 130.
OB turns idle. Further, according to this embodiment, a drive system 150 for raising and lowering the suction grille 9, that is, a clutch including the main pulleys 100A and 100B, the shaft 110, and the torque transmitting means 130, and a suction grill described later. A drive system 150 including a lifting motor 140 and the like is shown in FIG.
As shown in (1), they are collectively arranged on a support plate 151 extending into the opening of the unit body 2. This support plate 151 is, as shown in FIG.
The drive system 150 is fixed to the decorative panel 7 and the drive system 150 is fixed to the decorative panel 7 side. An electrical box 160 for controlling the present air conditioner extends inside the opening of the unit body 2 so as to face the support plate 151. The electrical box 160 and the support plate 151 extend into a so-called air intake opening of the unit body 2. That is, the support plate 1
51 extends to area 190A and electrical box 160 extends to area 190B, but their presence does not obscure the air intake function. The remaining space 170 is formed so that air can be sufficiently taken in. Drive system 1 described above
50 is fixed to the decorative panel 7, whereas the electrical box 160 is fixed to the unit body 2. The drive system 150 will be described in more detail. The shaft 110 has two bearings 15 on a support plate 151.
2 so as to be rotatable. A gear 153 is fixed substantially at the center of the shaft portion of the shaft 110.
4 mesh with each other, and this gear 154 is fixed to the output shaft of the suction grille elevating motor 140 described above. Reference numeral 141 is a motor capacitor, and 143 is a timer (for correction). Referring to FIG. 1, a pull switch (operation switch) 51 is provided for raising and lowering the suction grill 9. Further, with reference to FIG. 2, an upper limit position detecting sensor 52 and a lower limit position detecting sensor 53 are provided. Is provided. The lower limit position detection sensor 53 detects the lower limit position of the suction grille 9 based on the extension length of the suspension string 31. Specifically, the extension length of the suspension string 31 is detected by the number of turns (height) of the suspension string 31 wound around the main pulley 100B. The operation switch is not limited to the pull switch 51. For example, a fixed switch such as a wall-mounted switch may be used, and the fixed switch may be connected to the lifting / lowering motor 140 via a cable. Next, the operation of the embodiment will be described with reference to FIG. For example, a pull-down bar is prepared.
Pull the pull switch 51 using this (pull operation)
(S1), the suction grill elevating motor 140 rotates forward, the drive system 150 is driven, and the suction grill 9 starts lowering via the suspension string 31 (S2). When the pull switch 51 is further pulled (S3), the suction grill 9 is pulled.
Stops descending (S4), and further pulls the pull switch 51 (S5).
This time, the suction grille 9 rotates reversely, and the suction grille 9 starts to rise (S
6). Note that a rotary pull switch is adopted as the pull switch 51, and when the switch is repeatedly pulled, the suction grill lifting / lowering motor 140 causes a “forward rotation”
By repeating "stop" and "reverse rotation", the suction grill 9 repeats the operations of "down", "stop", "up", and "stop" in order. At S6, after the suction grill 9 has been turned up,
When the suction grill 9 reaches the upper limit position, the upper limit position detection sensor 52 is activated, and at the same time, the timer 143 is activated, and after X seconds (for example, 0.3 to 2 seconds) elapse (S
7), the reverse rotation of the suction grill lifting / lowering motor 140 is stopped, and the lifting of the suction grill 9 is stopped (S8). When the suction grille 9 is lifted by the suspension strings 31, the lengths of the four suspension strings 31 are not necessarily equal, and in some cases, the suction grille 9 may be lifted.
May be lifted in an inclined state. Thus, according to this embodiment, even if the suction grill 9 is lifted in an inclined state, after a predetermined time (X seconds) has passed since the upper limit position detection sensor 52 was activated, the suction grill 9 was lifted. Since the reverse rotation of the lifting / lowering motor 140 is stopped, the main pulleys 100A and 100B until the suspension strings 31 are completely wound up to that time.
Is continued, the suction grille 9 is completely lifted until it becomes horizontal, and comes into close contact with the decorative panel 7. In this case, of the four suspension strings 31, the suspension string 31
Of the main pulleys 100A, 100B, which have already been wound
As described above, the shaft idles on the shaft of the shaft 110 as described above. In the process of lowering the suction grill 9, by pulling the pull switch 51 as described above (S3),
Since the suction grill 9 stops descending (S4), it is possible to temporarily stop the suction grill 9 at an arbitrary position. Although not shown in FIG. 1, an air cleaning filter 24 (FIG. 4) is mounted on the upper part of the suction grille 9, so that the suction grille 9 is pulled down from the ceiling surface 6 as shown in FIG. When the operation is temporarily stopped, operations such as replacement and cleaning of the filter 24 can be performed at a low place. Therefore, as compared with the case of working at a high place, not only the work is simplified, but also the safety of the work can be improved. The raised suction grille 9 may be configured to be fixed to the decorative panel through suction grille locking means (not shown). However, this locking means is not essential, and in this embodiment, Omitted. As a simple suction grill locking means, referring to FIG. 1, it is possible to provide a magnet 43 on the decorative panel 7 and lock the suction grill 9 with the magnet 43. In short, according to this embodiment, the pulling switch 51 is pulled to operate the suction grill elevating motor 1
By driving the shaft 40, the shaft 110 rotates,
The main pulleys 100A and 100B connected to the shaft 110 via a clutch rotate, and the main pulleys 100A and 100B rotate.
A, the suspension string 31 wound around 100B is paid out / rewinded, whereby the suction grille 9 is automatically moved up and down. Position) and maintenance can be performed. Further, according to the configuration of this embodiment, the suction grill is repeatedly lowered, stopped, raised and stopped in order by pulling the rotary pull switch, so that the suction grill can be moved to an arbitrary position by a simple operation. Can be stopped. Further, since only one suction grill elevating motor 140 needs to be provided, the increase in cost is small, and compared with the case where a plurality of suction grill elevating motors 140 are provided.
The structure is simple and less prone to failure. When an excessive load is applied, the clutch operates and the main pulleys 100A and 100B run idle, thereby preventing the suction grill elevating motor 140 from burning. In addition, the hanging string 31
For example, if the lengths of the four suspension strings 31 are unbalanced during the rewinding, the length of the suspension strings 31 may be unbalanced due to idle rotation of the main pulleys 100A and 100B during the final rewinding of the suction grille 9. Is absorbed, the suction grille 9 is completely adhered to the decorative panel 7, and no gap is formed there. FIGS. 6 and 7 show another embodiment. According to the embodiment shown in FIGS. 1 to 5, the suspension string 31 is completely extended, and the suction grille 9 reaches the lowermost position (for example, a position 2 m from the ceiling) or is lowered. Unless the pull switch 51 is pulled on the way and the suction grill 9 is stopped halfway, the operation of the suction grill elevating motor 140 is continued, so that the lowering operation of the suction grill 9 is not stopped halfway. Absent. Therefore, when furniture such as a chest 80 as an obstacle (FIG. 7) is located directly below the suction grill 9, the suction grill 9 continues to descend and hits the chest 80 immediately below, and the suction grill 9 is moved. Even if the operation is forcibly stopped, the lowering operation of the suction grille 9 is continued unless the operator notices it and pulls the pull switch 51. Accordingly, the hanging string 31 is slackened, which is entangled and sucked again. When the grill 9 is to be raised, it cannot be raised. According to another embodiment of FIGS. 6 and 7,
When the hanging string 31 sags as shown by the dotted line, a sensor 65 for detecting the slack is provided. When the sensor 65 operates, the suction grill elevating motor 14
0 operation is stopped. This sensor 65 has a spring 67 as shown in FIG.
7 is hooked on the hanging string 31c. The spring 67 is urged downward as indicated by the dotted line. When the tip 67a is hooked on the hanging string 31c, the spring is urged upward as indicated by the solid line due to the tension of the hanging string 31c. In short, the spring spring 67 is always urged upward by the tension of the hanging string 31c, and when the hanging string 31c is slack, the spring spring 67 is urged downward as indicated by the dotted line, and urged downward. Then, for example, the contact point of the limit switch 69 is opened, and the operation of the suction grill elevating motor 140 stops. According to this embodiment, for example, when the suction grill 9 hits the chest 80 (FIG. 7) and the hanging string 31 slacks as shown by the dotted line, the sensor 65 detects this and the motor for lifting and lowering the suction grill. Since the operation of 140 is stopped,
Further, the suction grille 9 does not descend continuously, so that the hanging string 31 does not sag and become entangled, and safety at the time of lifting and lowering the suction grille is ensured. According to the present invention, the suction grille is supported by a plurality of suspension strings so as to be able to move up and down freely. Due to this, even if the suction grill is tilted at the upper limit position of the suction grill, the elevating motor continues to operate until the timer counts a predetermined time, during which time the short suspension string is wound. The winding of the suspension string is continued until the long suspension string is completely wound, such as when the pulley idles at the upper limit position, so that the inclination of the suction grill is eliminated and the upper limit position of the suction grill In the above, no gap is generated between the decorative panel and the suction grill. [0050] [0051] Also, during the descent of the suction grill embedded in a ceiling, for example, when obstacles such as chests, if such downward movement of the suction grille is forcedly stopped, the driving of the elevating motor Is stopped, the suction grill stops at that location, and safety is ensured. Also, in the case where the hanging string is connected to the suction grill, the slack of the hanging string is detected on the way, and the operation of the motor for lifting and lowering is stopped after that, so the suction grill stops at that place, and therefore, The hanging string is not entangled, and safety is ensured.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an embedded ceiling air conditioner according to the present invention. FIG. 2 is a plan view showing a suction grill. FIG. 3A is a perspective view showing a state in which a suction grille is suspended, and FIG. 3B is an enlarged view of a hook. FIG. 4 is a longitudinal sectional view of the ceiling-mounted air conditioner. FIG. 5 is a diagram showing a processing flow of the present invention. FIG. 6 is a diagram corresponding to FIG. 2 of another embodiment. FIG. 7 is a diagram corresponding to FIG. 3A of another embodiment. [Description of Signs] 2 Unit body 7 Decorative panel 9 Suction grill 24 Filter 31 Hanging string 51 Operation switch (Pull switch) 52 Upper limit position detecting means (Sensor) 53 Upper limit position detecting means (Sensor) 65 Sensor 80 Furniture (commode) 100A , 100B Main pulley 110 Shaft 130 Rotating force transmission means 140 Suction grill elevating motor 150 Drive system

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazunobu Okawa 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Kazuaki Sakai 2-5-2 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. (56) References JP-A-6-26667 (JP, A) JP-A-6-159718 (JP, A) JP-A-5-283191 (JP, A) JP-A-57 -23405 (JP, A) Japanese Utility Model 5-40727 (JP, U) Japanese Utility Model Showa 55-45165 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) F24F 1/00 401 F21V 21/36

Claims (1)

(57) [Claims] [Claim 1] Fix one end of the suspension string to the suction grill,
Wrap the other end of the suspension string around the pulley, and
Shuffle via clutch that spins when load is applied
Connected to the shaft, and a suction grill elevating motor
Connect the hanging string by operating this lifting / lowering motor.
Extend / rewind for filter replacement, cleaning, etc.
Lower or raise the suction grill to the desired position.
In the ceiling-mounted air conditioner to be moved , the suction grill turned downward toward the arbitrary position.
A sensor for detecting the slack of the hanging string when
When the sensor operates, the suction grill elevating motor is stopped.
Means for stopping the suction grill when the suction grill turns upward.
One upper limit position detection for detecting the upper limit position of the suction grille.
Output means and this one upper limit position detecting means operate
The timer that counts the predetermined time and the suction grille
The timer counts a predetermined time
After stopping, the suction grill elevating motor is stopped.
Ceiling-mounted air conditioning characterized by having control means
Machine.