JP2008241187A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner capable of preventing scattering of abrasion powder of a revolving belt and a pulley into an air-conditioning object room. <P>SOLUTION: This air conditioner is provided by forming a ventilation passage B communicating a suction port 9 with a blowout port 10 in a body casing A, and is formed by arranging a heat exchanger 8, a fan 6, a fan side pulley 3 installed on a rotary shaft 20 of the fan 6, a motor side pulley 2 installed on a rotational driving shaft 19 of a motor 1, and the revolving belt 4 wound around between the fan side pulley 3 and the motor side pulley 2, in the ventilation passage B. The air conditioner is formed by arranging the fan 6 on the downstream side in the ventilation direction more than the fan side pulley 3, and is constituted so as to be isolated from the ventilation passage B by covering the motor side pulley 2, the fan side pulley 3 and the revolving belt 4 with a cover member 11. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to an air conditioner having a fan driven by a pulley and a belt.

Conventionally, as this type of air conditioner, those shown in FIGS. 7 and 8 are known. The air conditioner shown in each figure includes a heat exchanger 8 of a refrigerant circuit, a fan 6, and a fan side attached to the fan 6 in a ventilation path B of a main casing A having a suction port 9 and a blower port 10. A pulley 3, a motor-side pulley 2 attached to a motor 1 that drives a fan 6, and a circulating belt 4 that is wound between the fan-side pulley 3 and the motor-side pulley 2 are provided. In this air conditioner, the air sucked into the main body casing A from the suction port 9 by driving the fan 6 is heat-exchanged by the heat exchanger 8 and then the suction openings 25 and 25 on both sides enter the fan casing 5. And is blown out from the outlet 10 by the action of the fan 6. In this case, the rotational force of the motor 1 is transmitted to the fan 6 via the motor-side pulley 2, the circulating belt 4, and the fan-side pulley 3.
On the other hand, what was described in the following patent document 1 is known regarding the structure which attached the pulley cover.

Japanese Patent Laid-Open No. 7-119484 (FIG. 1)

By the way, in the above-described conventional air conditioner, in a computer room, a food factory, or the like that is intended for cooling an indoor space that requires high air cleanliness, the motor side pulley 2, the fan side pulley 3, and the circulation Since the belt 4 is disposed in the ventilation path B on the upstream side of the suction opening 25 of the fan casing 5, wear powder of the circulating belt 4 and the pulleys 2 and 3 generated due to deterioration over time is generated from the suction opening 25 in the fan casing 5. There is a problem that the air is sucked into the air-conditioned room from the air outlet 10 together with the air. Alternatively, the generated wear powder stays on the substrate portion 13A of the base 13, and thus there is a problem in that the appearance is impaired or the substrate portion 13A is rusted.
Further, if the belt 4 is worn or stretched and the pulleys 2 and 3 are misaligned, the vibration increases, and the belt 4 is cut to reduce the air volume or stop air blowing, resulting in a state where cooling is not possible (during cooling operation). . In this case, the air conditioner has a control function for abnormally stopping, but in the current control, there is a time lag between the occurrence of the abnormality as described above and the abnormal stop, during which the temperature in the air-conditioned room is There was also a problem of rising.
On the other hand, since the pulley cover described in Patent Document 1 only covers the top of the pulley and does not cover the entire periphery of the pulley, the wear powder of the pulley and the circulating belt scatters around them and below the pulley. They had to stay on the installation surface.

The present invention has been made to solve the above-described problems, and a first object is to obtain an air conditioner that can prevent abrasion powder of a circulating belt and a pulley from scattering into an air-conditioned room. It is.

The second object is to obtain an air conditioner that can detect abnormal vibration or belt breakage due to the misalignment of the pulley in a timely manner.

  In the air conditioner according to the present invention, an air passage that connects the air inlet and the air outlet is formed in a main body casing having an air inlet and an air outlet, and in the air passage, a heat exchanger, a fan, and A fan-side pulley attached to the rotation shaft of the fan, a motor-side pulley attached to the rotation drive shaft of the motor that drives the fan, and a circulating belt that is wound between the fan-side pulley and the motor-side pulley are provided. In the air conditioner in which the fan is disposed downstream of the fan side pulley in the ventilation direction, the motor side pulley, the fan side pulley, and the circulating belt are covered with a cover member and separated from the ventilation path. It is a thing.

According to the present invention, the motor-side pulley, the fan-side pulley, and the circulating belt are covered with the motor-side pulley, the fan-side pulley, the circulating belt, and the cover member disposed between the fans and are isolated from the ventilation path. Therefore, it is possible to prevent wear powder from the motor-side pulley, the fan-side pulley, or the circulating belt, which is generated due to deterioration over time, from being sucked into the fan and scattered from the air outlet into the air-conditioned room. In addition, the above-mentioned wear powder stays on the bottom surface of the main body casing located below the motor-side pulley, fan-side pulley, or circulating belt, preventing rust generation, maintaining aesthetics, and cleaning during maintenance. Efficiency can be improved.

Embodiment 1 FIG.
FIG. 1 is an internal configuration diagram of a main body casing in which a front plate of a main body casing of a pulley / belt drive type air conditioner according to Embodiment 1 of the present invention is removed, and FIG. 2 is an embodiment of the present invention. FIG. 3 is a partial perspective view showing a main part of the air conditioner in FIG. 1, and FIG. 3 is a partial perspective view showing a state in which the tray body is pulled out by the air conditioner in Embodiment 1 of the present invention.
1 to 3, in the air conditioner of this embodiment, a box-shaped main body casing A is a ventilation path B, and in this ventilation path B, a motor 1, a motor-side pulley 2, a fan A side pulley 3, a circulating belt 4, a fan casing 5, a fan 6, a control device 7, and a heat exchanger 8 are provided. A suction port 9 that is covered with a filter is formed in the upper portion of the main body casing A, and an air outlet 10 is formed in the bottom portion of the main body casing A. The suction port 9 and the air outlet 10 are connected by a ventilation path B in the main body casing A. The heat exchanger 8 is installed in the upper part of the ventilation path B, and the motor 1, the fan 6, the pulleys 2 and 3, the circulating belt 4 and the like are installed in the lower part of the ventilation path B. For example, a sirocco fan is used as the fan 6. In addition, a notification device 18 is provided in the main body casing A.

  The motor-side pulley 2 is attached to the rotational drive shaft 19 of the motor 1, and the fan-side pulley 3 is attached to the rotational shaft 20 of the fan 6. The fan-side pulley 3 is disposed in the vicinity of one suction opening 25 of the fan casing 5. A circling belt 4 is wound around the motor-side pulley 2 and the fan-side pulley 3. The fan 6 is built in the fan casing 5. The rotating shaft 20 is rotatably supported by bearings 26 and 26 disposed on both sides of the fan casing 5. The motor 1, the fan casing 5, and the bearing portions 26 and 26 are installed on the base plate portion 13A of the base 13 of the main body casing A, and the air outlet 10 is formed in the base plate portion 13A.

A cover member 11 made of a steel plate, a stainless steel plate, or a synthetic resin is disposed between the motor-side pulley 2, the fan-side pulley 3, the circulating belt 4, and the fan casing 5. That is, the cover member 11 covers the motor side pulley 2, the fan side pulley 3, and the circulating belt 4 and isolates them from the ventilation path B. At the bottom of the cover member 11, a tray 12 for receiving foreign matter such as abrasion powder from the motor-side pulley 2, the fan-side pulley 3 or the circulating belt 4 can be pulled out and stored in the front-rear direction (arrow G direction). Is done. A magnetic body 21 typified by a magnetic sheet or the like is attached to the surface of the saucer body 12. A see-through portion 22 that can visually recognize the inside of the saucer body 12 from the outside is provided at the lower front portion of the cover member 11. The see-through portion 22 is made of, for example, a transparent or translucent synthetic resin. However, as a material of the see-through portion 22, glass or the like may be used in addition to the synthetic resin.

As shown in FIGS. 4A to 4F, the cover member 11 is configured by assembling a plurality of plate materials 11 a to 11 f on the substrate portion 13 </ b> A of the base 13. First, the vertically long mounting plate 11a is erected on the board portion 13A at the rear side of the fan-side pulley 3 with screws or the like (FIG. 1A). Next, the side plate 11b is disposed along the front-rear direction between the bearing portion 26 and the motor-side pulley 2 at a position below the rotary shaft 20, and the rear end edge of the side plate 11b is the one side edge of the mounting plate 11a. Fix the bottom with screws. At that time, the side plate 11b may be fixed to the support column of the bearing portion 26 with screws or the like (FIG. 5B). Then, the side plate 11c having the side surface portion and the upper surface portion on the fan casing 5 side is fixed to the upper edge of the side plate 11b and the upper and upper edges of one side edge of the mounting plate 11a with screws or the like ((c) in the figure). ). A round groove for avoiding interference with the rotating shaft 20 is formed at the lower edge of the side surface of the side plate 11c. Subsequently, the side plate 11d is arranged along the front-rear direction between the motor-side pulley 2, the fan-side pulley 3, the circulating belt 4, and the motor 1 at a position above the rotation drive shaft 19, and the rear plate 11d The end edge is fixed to the other side edge of the mounting plate 11a with a screw or the like. A round hole for avoiding interference with the tip of the rotating shaft 20 is formed in the side plate 11d. Next, the side plate 11e is fixed with screws or the like to the front edge of the side plate 11b, the front edge of the side surface and the top surface of the side plate 11c, and the front edge of the side plate 11d ((d) in the figure). Further, the side plate 11f is fixed to the lower portion of the front edge of the side plate 11b, the lower edge of the side plate 11e, and the lower edge front portion of the side plate 11d with a screw or the like (FIG. 5E). A round groove portion (not shown) for avoiding interference with the rotary drive shaft 19 is formed at the upper edge end portion of the side surface portion of the side plate 11f. In this way, the cover member 11 is assembled.

In the cover member 11 completed as described above, the lower side of the front surface of the side plate 11 f is a loading / unloading opening 27 for mounting the tray 12. The tray 12 can be pulled out from the loading / unloading opening 27 (in the direction of arrow G (front-rear direction)) (FIG. 4F). The saucer body 12 is formed in a square dish shape that is long in the front-and-rear direction and has an open top surface, and has a size that extends over the entire bottom surface in the cover member 11.

Operation | movement of the air conditioning apparatus of Embodiment 1 by an above-described structure is demonstrated. The air sucked from the suction port 9 passes through the heat exchanger 8 and exchanges heat with the refrigerant in the refrigerant circuit, and is then sucked into the fan casing 5 through the suction openings 25 and 25, and the blower outlet 10 is rotated by the rotation of the fan 6. Is blown into the air-conditioned room. Of these, wear powder is generated from the motor-side pulley 2, the fan-side pulley 3, and the circulating belt 4 due to deterioration over time. These wear powders stay in the cover member 11 and do not go out to the ventilation path B. Thereby, the said abrasion powder does not accompany the air (arrow F direction) sucked into the suction opening 25 of the fan casing 5 through the vicinity of the fan side pulley 3 and the motor side pulley 2. Accordingly, it is possible to send clean air from the air outlet 10 into the air-conditioning target room.

By the way, in the conventional air conditioner, there are some cases where a filter is installed to prevent the abrasion powder etc. from scattering into the air-conditioned room. When maintaining the above, there arises a problem that the input increases due to the increase in the output of the motor 1 and the COP (energy consumption efficiency) deteriorates. However, according to the air conditioning apparatus of the first embodiment, the above-described problem does not occur.

On the other hand, the wear powder remaining in the cover member 11 accumulates on the tray 12 and is not scattered on the substrate portion 13A. Thus, the maintenance work is facilitated by providing the drawer tray 12 that can be attached and detached in the lower part of the cover member 11. In addition, by collecting the wear powder on the tray 12, it is possible to provide an appropriate judgment material for pulley replacement timing. In addition, by providing the upper edge shape of the saucer body 12 with an inclination that is lowered in the rearward direction, the storage property to the lower part of the cover member 11 is improved, and the cover member 11 is easily fixed to the lower edge.
As described above, the cover member 11 is configured to be assembled and disassembled, and the tray 12 is configured to be retractable and retractable with respect to the cover member 11, so that the air conditioner has already been installed on site. When there is a request for attachment or removal of the cover member 11 and the tray 12, the attachment and detachment can be easily performed from the front side, which is the direction of service.

Further, when the cover member 11 is made of a material in which iron powder is slippery like a synthetic resin, the wear powder in the cover member 11 is efficiently received while suppressing the wear powder from adhering to the inner surface of the cover member 11. The body 12 can be guided. And since the magnetic body 21 is attached to the saucer body 12, the magnetic content in an abrasion powder adheres to the magnetic body 21. FIG. As a result, the effect of preventing the abrasion powder from scattering can be enhanced, and at the same time, the efficiency of cleaning during maintenance can be improved. In addition, since the see-through portion 22 is provided on a part of the side plate 11f on the front surface of the cover member 11 and has a skeleton specification, the foreign matter in the tray 12 can be removed when the pulley or the circulating belt is replaced or cleaned during maintenance. The amount of deposition can be easily confirmed from the outside.

Embodiment 2. FIG.
In the air conditioner according to the second embodiment, as shown in FIGS. 5 and 6, the vibration detection device 14 that detects the vibration of the motor side pulley 2, the fan side pulley 3, or the circulating belt 4 is provided on the upper surface of the cover member 11. Is installed. In addition, a notification device 18 is provided in the main body casing A. The notification device 18 is communicatively connected to the microcomputer 17 of the control device 7. The microcomputer 17 has a function of a first abnormality detection device 23 described later. Further, the vibration detection device 14 is connected to a microcomputer 17 for communication. Therefore, the vibration detection signal input from the vibration detection device 14 to the microcomputer 17 indicates that the vibration level at which the motor side pulley 2, the fan side pulley 3, or the rotating belt 4 becomes abnormal (obtains an abnormal vibration level value by a test or the like in advance). The first abnormality detection device 23 of the microcomputer 17 outputs an abnormality detection signal related to an abnormality in the motor side pulley 2, the fan side pulley 3, or the circulating belt 4 when the value exceeds the value stored in the memory of the microcomputer 17. The information is output to the notification device 18. In response to this, the alarm device 18 emits an alarm or generates an alarm sound, or remotely outputs an alarm signal to notify the outside.

  According to the air conditioner of the second embodiment, since the vibration detection device 14 is provided, abnormal vibration due to wear or elongation of the circulating belt 4 or misalignment of the pulleys 2 or 3 or rotation that is not detected during normal operation. Abnormalities such as vibration when the belt runs out can be detected in a timely manner. Thereby, it becomes possible to notify without causing the time lag of the abnormal stop by the current control. The cover member 11 having a certain abnormal strength is manufactured and installed on the substrate portion 13A in the same manner as the motor 1 and the bearing portion 26, so that the vibrations of the pulleys 2 and 3 and the circulating belt 4 can be prevented. Is transmitted to. Therefore, the vibrations of the pulleys 2 and 3 and the rotating belt 4 can be measured by the vibration detector 14. From such a viewpoint, it is desirable that the vibration detection device 14 is attached to the upper part of the cover member 11 having good stability.

Embodiment 3 FIG.
In the air conditioner according to the third embodiment, as shown in FIGS. 5 and 6, the light emitting device 15 that emits laser light toward the circumferential belt 4 in an inclined portion between the pulleys 2 and 3 includes a cover. It is arranged in the lower rear part in the member 11. In addition, a light receiving device 16 is arranged at the front upper portion in the cover member 11 where the light from the light emitting device 15 is shielded by the circulating belt 4. The light receiving device 16 is communicatively connected to the microcomputer 17 of the control device 7. The microcomputer 17 has a function of a second abnormality detection device 24 described later. Since the light emitting device 15 and the light receiving device 16 need to directly monitor the circulating belt 4 itself, it is desirable to attach the light emitting device 15 and the light receiving device 16 to both sides of the portion of the circulating belt 4 that is inclined between the pulleys 2 and 3. In this air conditioner, when the light receiving device 16 detects the laser light from the light emitting device 15, the second abnormality detecting device 24 of the microcomputer 17 assumes that an abnormality such as a cut or a partial defect of the circulating belt 4 has occurred. An abnormality detection signal related to the abnormality of the belt 4 is output to the notification device 18. In response to this, the notification device 18 emits an alarm, generates an alarm sound, or remotely outputs an alarm signal to notify the outside.

According to the air conditioner of the third embodiment, by providing the light emitting device 15 and the light receiving device 16, abnormalities such as cutting or missing of the rotating belt 4 that are not detected during normal operation are detected in a timely manner. It is possible to notify without causing a time lag of abnormal stop due to control. In addition, the light emitting device 15 and the light receiving device 16 can detect the magnitude of the swing width of the circumferential belt 4, that is, vibration. This vibration is caused not only by the circumferential belt 4 but also by abnormal vibrations of the pulleys 2 and 3 transmitted to the circumferential belt 4. Therefore, the same function and effect as the above-described vibration detection device 14 can be obtained. That is, by using the light emitting device 15 and the light receiving device 16, the vibration detecting device 14 can be omitted.

Embodiment 4 FIG.
By the way, the motor-side pulley 2 and the fan-side pulley 3 can be adapted to a static pressure different from the standard external static pressure, change the air flow range, or change the filter specifications according to customer requirements. For example, different pulley diameters (diameters) within a range of about 100 mm can be used.
Therefore, the cover member 11 of the air-conditioning apparatus according to the fourth embodiment has a motor-side pulley 2 having the largest pulley diameter so as to be compatible with all combinations of pulleys 2 and 3 that are set as options depending on the model. And the cover inner shape and the cover inner volume that can accommodate the combination of the fan side pulley 3. Further, the cover member 11 is composed of a plurality of plate members 11a to 11f, and for example, some plate members 11b to 11f are removed by removing screws. Thereby, the service space which can be used for pulley removal when exchanging the motor side pulley 2, the fan side pulley 3, or the circulating belt 4 is secured.

  According to the air conditioner of the fourth embodiment, even when the pulley diameter (diameter) is replaced with different pulleys 2 and 3 within a range of about 100 mm, only one cover member 11 can be used. Therefore, there is no need to replace the cover member each time the pulley is replaced, and it is not necessary to prepare a plurality of types of cover members having different sizes. Further, when replacing the motor-side pulley 2 and the fan-side pulley 3, it is not necessary to remove all of the plate members 11a to 11f of the cover member 11. For example, the pulleys 2 and 3 can be replaced by removing the side plates 11d and 11e. Furthermore, it is useful that the side plate 11e can be opened and closed with a hinge (not shown) so that confirmation of the tension of the circulating belt 4 and abnormality of the pulleys 2 and 3 can be easily performed.

  In the above-described embodiment, an example in which the small magnetic body 21 is attached to the front surface of the tray 12 for the sake of simplicity is shown. However, the present invention may be one in which the magnetic body is attached to a cover member. Absent. Or this invention includes not only what provided the magnetic body in the cover member or a part of saucer body, but what provided the magnetic body in the whole surface of the cover member and / or saucer body. Thus, by providing a magnetic body on the entire surface of the cover member and / or the saucer body, even if sand iron which is a part of the wear powder diverges in all directions, it can be reliably captured.

Moreover, in said embodiment, although the see-through | perspective part 22 was provided in the side plate 11f of the front surface of the cover member 11, you may provide a see-through part in which the inside of a saucer can be visually recognized in a saucer body. Further, the present invention is not limited to a cover member or a part of the saucer body provided with a see-through portion, but also includes the entire cover member and / or the entire saucer body made of a transparent or translucent material.

FIG. 3 is an internal configuration diagram of the inside of a main body casing of the air-conditioning apparatus according to Embodiment 1 of the present invention as viewed from the front. 1 is a partial perspective view showing a main part of an air conditioning apparatus according to Embodiment 1 of the present invention. FIG. 3 is a partial perspective view showing a state in which the tray body is pulled out by the air-conditioning apparatus according to Embodiment 1 of the present invention. It is the fragmentary perspective view which showed sequentially the procedure which assembles the cover member of the air conditioning apparatus in Embodiment 1 of this invention in the figure (a)-(f). It is a side block diagram which shows the principal part of the air conditioning apparatus in Embodiment 2 of this invention. It is a fragmentary perspective view which shows the principal part of the air conditioning apparatus in Embodiment 2 of this invention. It is the internal block diagram which looked at the inside of the main body casing of the conventional air conditioning apparatus from the front. It is a bottom view of the conventional air conditioner.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Motor 2 Motor side pulley 3 Fan side pulley 4 Circulating belt 6 Fan 8 Heat exchanger 9 Suction port 10 Outlet 11 Cover member 12 Sauce body 14 Vibration detector 15 Light emitting device 16 Light receiving device 17 Microcomputer 19 Rotation drive shaft 20 Rotation shaft 21 magnetic body 22 see-through part 23 first abnormality detection device 24 second abnormality detection device 25 suction opening A main body casing B ventilation path F arrow G arrow

Claims (6)

An air passage is formed in the main body casing having an air inlet and an air outlet, and the air inlet and the air outlet are in communication with each other.
In the ventilation path, a heat exchanger, a fan, a fan-side pulley attached to a rotation shaft of the fan, a motor-side pulley attached to a rotation drive shaft of a motor that drives the fan, and the fan side A circulating belt hung between the pulley and the motor-side pulley is provided,
In the air conditioner in which the fan is disposed on the downstream side in the ventilation direction from the fan-side pulley,
An air conditioner characterized in that the motor-side pulley, the fan-side pulley, and the circulating belt are covered with a cover member and isolated from the ventilation path. The air conditioner according to claim 1, wherein a tray body is detachably disposed at the bottom of the cover member. The air conditioner according to claim 2, wherein a magnetic material is provided on the cover member or the tray. The air conditioner according to claim 2 or 3, wherein the cover member or the saucer body is provided with a see-through part that allows the inside of the saucer body to be visually recognized from the outside. A vibration detection device that detects vibration of a motor-side pulley, fan-side pulley, or rotating belt and outputs a signal related to the vibration detection, and a vibration detection signal input from the vibration detection device exceeds a predetermined vibration level. 5. The apparatus according to claim 1, further comprising a first abnormality detection device that outputs an abnormality detection signal related to abnormality of the motor-side pulley, the fan-side pulley, or the rotating belt. An air conditioner according to claim 1. A light emitting device that emits light toward the circulating belt, a light receiving device that is disposed at a position where light from the light emitting device is shielded by the circulating belt, and when the light receiving device detects light from the light emitting device The air conditioner according to any one of claims 1 to 5, further comprising a second abnormality detection device that outputs an abnormality detection signal related to an abnormality of the circumferential belt.

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