JP3696546B2 - Internal automatic cleaning air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an internal automatic cleaning air conditioner that can automatically clean the inside of a casing and a heat exchanger.
[0002]
[Prior art]
In food factories and pharmaceutical factories, etc., there are rooms that handle large amounts of powder, and air conditioning in such rooms is generally performed after the room air is sucked by a blower and passed through a heat exchanger to exchange heat. The method introduced in is adopted. In that case, the powder adheres to the inside of the heat exchanger or air conditioner and the inside of the air conditioner becomes unsanitary. There was a problem of causing trouble. In order to avoid this, a filter may be provided on the heat exchanger inlet side, but the filter is clogged with powder, and the air-conditioning function is reduced as described above.
[0003]
On the other hand, the present applicant proposed in JP-A 2000-337655 an internally washable packaged air conditioner in which an air passage portion such as a heat exchanger or an air conditioner can be washed with water. Although this air conditioner can efficiently remove the powder adhering to the inside of the heat exchanger and air conditioner, the cleaning method is a method in which the operator opens the air passage part of the door and sprays it with water. For this reason, there is a demand for further labor saving in the cleaning operation, and there is a concern about increasing the humidity in the working chamber during cleaning, and measures for maintaining a low humidity in the manufacturing environment have been an issue. In addition, since a manual cleaning operation is required at the time of cleaning, the installation form is limited to the floor type.
[0004]
[Problems to be solved by the invention]
As described above, the conventional air conditioner has to be frequently subjected to manual maintenance such as cleaning of the heat exchanger and replacement of the filter, which causes an increase in operation management cost.
[0005]
The present invention has been made in view of the above circumstances, and can automatically clean the powder adhering to the inside of the casing and the heat exchanger, and can be installed regardless of the floor-mounted type or the ceiling-mounted type. An object is to provide an easy internal automatic cleaning air conditioner.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the internal automatic cleaning air conditioner of the present invention includes an upstream casing provided with an air conditioning air inlet portion that can be opened and closed, and a downstream casing provided with an air conditioning air outlet portion that can be opened and closed. A heat exchanger provided between the upstream casing and the downstream casing to allow air to pass therethrough, a first cleaning device provided in the upstream casing, and a second provided in the downstream casing The cleaning device and the first cleaning device are cleaned in the direction of the inner surface of the casing upstream of the heat exchanger and the direction of the heat inlet of the heat exchanger so as to clean the inner surface of the upstream casing and the heat exchanger air inlet. The cleaning nozzle of the first cleaning device for injecting the working fluid and the second cleaning device are provided on the downstream side of the heat exchanger so as to clean the inner surface of the downstream casing and the heat exchanger air outlet. Is characterized in further comprising a cleaning nozzle of the second cleaning device for ejecting a cleaning fluid in the pacing inner surface direction and the heat exchanger air outlet direction.
[0007]
In the internal automatic cleaning air conditioner, the air conditioning air inlet portion of the upstream casing and the air conditioning air outlet portion of the downstream casing are automatically closed during the operation of the cleaning device. is there.
[0008]
The internal automatic cleaning air conditioner according to the present invention includes an upstream casing provided with an air conditioning air inlet portion that can be opened and closed, a downstream casing provided with an air conditioning air outlet portion that can be opened and closed, an upstream casing, and a downstream casing. A heat exchanger provided between the side casings for allowing air to pass through, a first cleaning device provided in the upstream casing, a second cleaning device provided in the downstream casing, A first cleaning device is provided for injecting a cleaning fluid in the direction of the inner surface of the casing on the upstream side of the heat exchanger and the direction of the heat exchanger air inlet so as to clean the inner surface of the upstream casing and the heat exchanger air inlet. The cleaning nozzle of the first cleaning device and the second cleaning device are arranged in the direction of the inner surface of the casing on the downstream side of the heat exchanger so as to clean the inner surface of the downstream casing and the air outlet of the heat exchanger. A cleaning nozzle of the second cleaning device for ejecting a cleaning fluid to a fine heat exchanger air outlet direction, it flows through the drying fluid through the drying fluid inlet and outlet portion provided on the upstream side casing and the downstream casing And a drying device for drying the inner surface of the upstream casing, the inner surface of the downstream casing, and the heat exchanger.
[0009]
Further, according to the present invention, in the internal automatic cleaning air conditioner, the air conditioning air inlet and the drying fluid inlet / outlet portion of the upstream casing and the air conditioning air outlet and the drying fluid inlet / outlet portion of the downstream casing are automatically provided when the cleaning device is operated. The air conditioning air inlet portion of the upstream casing and the air conditioning air outlet portion of the downstream casing are kept closed while the drying apparatus is operated after cleaning, and the drying fluid for the upstream casing and the downstream casing is maintained. The entrance / exit part is automatically opened.
[0010]
In the internal automatic cleaning air conditioner, the present invention further includes a third cleaning device that discharges the accumulated solid matter by injecting a cleaning fluid onto a drain pan provided at the upstream casing bottom and the downstream casing bottom. It is characterized by.
[0011]
In the internal automatic cleaning air conditioner, the present invention is characterized in that a fluid containing a disinfectant is injected as a cleaning fluid.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the drawings.
[0013]
FIG. 1 is a structural explanatory view showing an embodiment of an internal automatic cleaning air conditioner according to the present invention.
[0014]
The air-conditioning air upstream casing 11 is configured in a box shape by an outer plate such as a water / corrosion resistant plate in which a heat insulating material is enclosed. The air inlet for air conditioning provided in the casing 11 is provided with a cylindrical casing having an air passage formed therein, and an air inlet opening / closing device 12 having an opening / closing plate capable of opening and closing the air passage. An actuator 13 for automatically operating opening / closing of the air inlet opening / closing device 12 is provided on the upper portion of the inlet opening / closing device 12. A first cleaning device 14 is provided in the casing 11, and the first cleaning device 14 is connected to cleaning fluid supply means (not shown) such as a pump and piping installed outside the air conditioner. A cleaning nozzle 15 for injecting a cleaning fluid such as water is provided, and a drain pan 16 is provided at the bottom of the casing 11. A heat exchanger 17 is provided downstream of the casing 11 for air conditioning air. The heat exchanger 17 is composed of, for example, a cross-fin coil type direct expansion coil, adjusts the amount of refrigerant with a refrigerant solenoid valve, circulates the refrigerant through the direct expansion coil, and connects the direct expansion coil via the temperature expansion valve. By cooling or heating, the air passing through the directly expanded coil is cooled or heated. An air conditioning air downstream casing 18 is provided downstream of the heat exchanger 17 from the air conditioning air. The casing 18 is configured in a box shape by an outer plate such as a water / corrosion resistant plate in which a heat insulating material is enclosed. The A second cleaning device 19 is provided in the casing 18, and this second cleaning device 19 is connected to cleaning fluid supply means (not shown) such as a pump and piping installed outside the air conditioner. A cleaning nozzle 20 for injecting a cleaning fluid such as water is provided, and a drain pan 21 is provided at the bottom of the casing 18. The air outlet for air conditioning of the casing 18 is provided with a cylindrical casing having an air passage formed therein, and an air outlet portion opening / closing device 22 having an opening / closing plate capable of opening and closing the air passage. An actuator 23 for automatically operating opening / closing of the air outlet opening / closing device 22 is provided on the upper portion of the opening / closing device 22. A blower chamber 34 housing the blower 24 is provided on the downstream side of the air outlet air opening / closing device 22 so as to allow the air-conditioning air to pass in the direction of the arrow 25.
[0015]
On the other hand, the casing 11 and the casing 18 are provided with means for allowing fluid to enter and exit through a route different from that of the air-conditioning air. That is, the upstream casing 11 is provided with a drying fluid inlet / outlet portion, and a drying device (not shown) is provided at the drying fluid inlet / outlet portion via the flow pipe 26. The flow pipe 26 is provided with a fluid opening / closing device 27. The downstream casing 18 is provided with a drying fluid inlet / outlet portion, and a drying device (not shown) is provided at the drying fluid inlet / outlet portion via a flow pipe 28. The circulation pipe 28 is provided with a fluid opening / closing device 29. The fluid switching devices 27 and 29 may be provided with actuators that automatically operate opening and closing. In this case, an ON-OFF type motor damper is suitable as a device suitable for the air opening / closing device 12 and the actuator 13, the air outlet switching device 22 and the actuator 23, the fluid switching device 27 and the actuator, and the fluid switching device 29 and the actuator. Available. These motor dampers are detachably provided on the upstream casing 11 or the downstream casing 18.
[0016]
Also, main components of the internal automatic cleaning air conditioner, that is, the upstream casing 11 including the first cleaning device 14 and the drain pan 16, the downstream casing 18 including the second cleaning device 19 and the drain pan 21, an actuator The air inlet section opening / closing device 12 provided with 13, the air outlet section opening / closing device 22 provided with the actuator 23, the fluid switching devices 27 and 29, the heat exchanger 17, and the blower chamber 34 provided with the blower 24 are independent units. It is possible to carry in and install by dividing each component.
[0017]
As shown in FIG. 3, the operation mode of the internal automatic cleaning air conditioner of the present invention includes an air conditioning operation mode, a cleaning operation mode, and a drying operation mode, and the respective control operations are as follows.
[0018]
In the air conditioning operation mode, that is, when air conditioning such as cooling and heating is performed by operating the heat exchanger 17, the fluid switching devices 27 and 29 are automatically closed to allow the drying fluid to enter and exit the casings 11 and 18. The blower 24 is operated in a state where the spraying of the cleaning fluid from the cleaning nozzles 15 and 20 of the cleaning devices 14 and 19 is stopped and the opening and closing devices 12 and 22 are automatically opened by the actuators 13 and 23. For example, the air for air conditioning passes in the direction of the arrow 25, and the air passing through the heat exchanger 17 is cooled or heated and supplied to the air conditioning target room. In this operation mode, for example, control is performed such that air conditioning is performed as normal control when the air conditioner is ON.
[0019]
Next, when the cleaning operation mode, that is, when the cleaning devices 14 and 19 are operated, the switching devices 12 and 22 are automatically closed by the actuators 13 and 23 and the fluid switching devices 27 and 29 are automatically closed. In the state where the flow of the drying fluid in the casings 11 and 18 is stopped, the cleaning fluid is ejected from the cleaning nozzle 15 of the first cleaning device 14 and the inner surface of the casing 11 and the heat exchanger upstream of the heat exchanger 17. The 17 air inlet is cleaned, and the cleaning fluid is jetted from the cleaning nozzle 20 of the second cleaning device 19 to clean the inner surface of the casing 18 downstream of the heat exchanger 17 and the air outlet of the heat exchanger 17. The cleaning fluid is collected in the drain pans 16 and 21 at the bottom of the casing and drained outside the air conditioner. In this operation mode, for example, the operation may be started after the air conditioning operation is completed and the operation may be performed for a predetermined time, or the differential pressure gauge measurement value between the heat exchanger air inlet / outlet during the air conditioning operation may be set. When the value exceeds a predetermined value, control may be performed such that the operation is started after the air-conditioning operation is completed and the operation is performed for a predetermined time.
[0020]
Finally, in the drying operation mode, that is, when the drying apparatus is operated after washing, the switchgears 12 and 22 are automatically closed by the actuators 13 and 23 and the fluid switchgears 27 and 29 are automatically And the drying fluid is passed through the casings 11 and 18 from the drying device via the flow pipes 26 and 28 to dry the inner surfaces of the casings 11 and 18 and the heat exchanger 17. In this case, the dry fluid may be put in from either of the flow pipes 26 and 28, and the dry fluid is put in from one flow pipe and discharged from the other flow pipe. In this operation mode, for example, control is performed such that operation is started after the end of the cleaning operation and operation is performed for a predetermined time.
[0021]
2A and 2B are a front view and a side view showing an example of the drain pan according to the present invention. An inclined drain pan 16 is provided at the bottom of the casing 11, and a third cleaning device such as a drain pan cleaning water supply pipe 31 and a drain pan cleaning nozzle 32 is provided upstream of the drain pan 16, and downstream of the drain pan 16. The drain pipe 33 is connected. That is, the third cleaning device ejects the cleaning fluid from the drain pan cleaning nozzle 32 to discharge the accumulated solid matter. The third cleaning device may be operated in conjunction with the first and second cleaning devices in the above-described cleaning operation mode, or the first and second cleaning devices are operated for a predetermined time. Operation may be started later until the cleaning operation mode ends.
[0022]
Note that a fluid containing a sterilizing / disinfecting agent can be used as the cleaning fluid sprayed from the first to third cleaning apparatuses. By using a fluid containing such a sterilizing / disinfecting agent, sterilizing / disinfecting can be performed, It is.
[0023]
Moreover, hot air or normal temperature wind can be used as the drying fluid supplied from the drying apparatus. In this case, if hot air is used, it can dry efficiently.
[0024]
As described above, in rooms handling large amounts of powder in food factories, pharmaceutical factories, etc., powder and dust adhere to the fins of the heat exchanger during air conditioning, so it is necessary to clean the heat exchanger after air conditioning. is there. In addition, moisture must be prohibited in a room that handles a large amount of powder, so it is necessary to dry the heat exchanger and the like after washing. In this case, a sufficient cleaning effect can be obtained by cleaning from both sides of the heat exchanger. Moreover, it is possible to prevent wrinkles from being generated in the heat exchanger or the like by washing and drying the heat exchanger or the like.
[0025]
【The invention's effect】
As described above, according to the present invention, it is possible to provide an internal automatic cleaning air conditioner that automatically cleans the powder adhering to the inside of the casing or the heat exchanger without manual intervention. Further, by providing an automatic cleaning mechanism, it is possible to provide an internal automatic cleaning air conditioner that can be installed regardless of a floor-mounted type or a ceiling-mounted type. In addition, the upstream and downstream casings equipped with the switchgear, cleaning device, and drain pan, the heat exchanger, and the blower chamber and other components are independent units. Can contribute to labor saving at the time of on-site construction. In addition, by providing an automatic cleaning mechanism and automatic drying mechanism using an opening / closing device, the interior of the casing, the space inside the air conditioner such as the heat exchanger, the space outside the air conditioner, the air conditioning target room, etc. can be easily provided during and after cleaning. An internal automatic cleaning air conditioner that can be maintained at low humidity can be provided.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing the configuration of an embodiment of an internal automatic cleaning air conditioner according to the present invention.
FIG. 2 is a front view and a side view showing an example of a drain pan according to the present invention.
FIG. 3 is an explanatory diagram showing an example of an operation mode of the internal automatic cleaning air conditioner according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11, 18 Casing 12 Air inlet part opening / closing apparatus 14 1st washing | cleaning apparatus 16, 21 Drain pan 17 Heat exchanger 19 2nd washing | cleaning apparatus 22 Air outlet part opening / closing apparatus 24 Blower 27, 29 Fluid switching apparatus

Claims (6)

An upstream casing provided with an air conditioning air inlet that can be opened and closed;
A downstream casing provided with an air outlet for air conditioning that can be opened and closed;
A heat exchanger provided between the upstream casing and the downstream casing to allow air to pass through;
A first cleaning device provided in the upstream casing;
A second cleaning device provided in the downstream casing;
The cleaning fluid is provided in the first cleaning device and injects a cleaning fluid in the direction of the inner surface of the casing upstream of the heat exchanger and the direction of the heat exchanger air inlet so as to clean the inner surface of the upstream casing and the heat exchanger air inlet. A cleaning nozzle of the first cleaning device;
The cleaning fluid is provided in the second cleaning device and injects a cleaning fluid in the direction of the casing inner surface on the downstream side of the heat exchanger and the direction of the heat exchanger air outlet so as to clean the inner surface of the downstream casing and the heat exchanger air outlet. An internal automatic cleaning air conditioner comprising: a cleaning nozzle of a second cleaning device .   2. The internal automatic cleaning air conditioner according to claim 1, wherein the air conditioning air inlet portion of the upstream casing and the air conditioning air outlet portion of the downstream casing are automatically closed during operation of the cleaning device. An upstream casing provided with an air conditioning air inlet that can be opened and closed;
A downstream casing provided with an air outlet for air conditioning that can be opened and closed;
A heat exchanger provided between the upstream casing and the downstream casing to allow air to pass through;
A first cleaning device provided in the upstream casing;
A second cleaning device provided in the downstream casing;
The cleaning fluid is provided in the first cleaning device and injects a cleaning fluid in the direction of the inner surface of the casing upstream of the heat exchanger and the direction of the heat exchanger air inlet so as to clean the inner surface of the upstream casing and the heat exchanger air inlet. A cleaning nozzle of the first cleaning device;
The cleaning fluid is provided in the second cleaning device and injects a cleaning fluid in the direction of the casing inner surface on the downstream side of the heat exchanger and the direction of the heat exchanger air outlet so as to clean the inner surface of the downstream casing and the heat exchanger air outlet. A cleaning nozzle of a second cleaning device;
And a drying device for drying the upstream casing inner surface, the downstream casing inner surface, and the heat exchanger by passing the drying fluid through the drying fluid inlet / outlet portions provided in the upstream casing and the downstream casing. Internal automatic cleaning air conditioner.   The air conditioning air inlet and drying fluid inlet / outlet portion of the upstream casing and the air conditioning air outlet and drying fluid inlet / outlet portion of the downstream casing are automatically closed when the cleaning device is operating, and the upstream casing is upstream when the drying device is operating after cleaning. The air conditioning air inlet portion of the side casing and the air conditioning air outlet portion of the downstream casing are kept closed, and the drying fluid inlet / outlet portions of the upstream casing and the downstream casing are automatically opened. The internal automatic cleaning air conditioner according to claim 3.   5. The apparatus according to claim 1, further comprising a third cleaning device that discharges the accumulated solid matter by injecting a cleaning fluid to a drain pan provided at the upstream casing bottom portion and the downstream casing bottom portion. The internal automatic cleaning air conditioner described in the section.   The internal automatic cleaning air conditioner according to any one of claims 1 to 5, wherein a fluid containing a sterilizing / disinfecting agent is jetted as a cleaning fluid.

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