JP4340673B2 - Air conditioner - Google Patents

Description

  The present invention relates to a precision temperature control air conditioner, and in particular, by cooling the control device of the control panel with air that has been temperature-adjusted in advance, the temperature fluctuation inside the control panel is reduced and the performance of the control device is stabilized. The present invention relates to an air conditioner that can greatly improve the temperature and humidity control accuracy of the air conditioner.

  Conventionally, as shown in FIG. 3, for example, an air conditioner includes a casing 3 in which an air inlet 1 and an air outlet 2 are formed, and a cooling coil 4 disposed on the downstream side of the air inlet 1. A reheater 5 disposed on the downstream side of the cooling coil 4, a blower 6 that exhausts air in the housing from the air discharge port 2, and a temperature sensor (not shown) disposed in the air discharge port 2. The outside air taken in while being cooled by the cooling coil 4 from the air suction port 1 is precisely adjusted to the set temperature by the reheater 5 disposed on the downstream side and discharged from the air discharge port 2. .

  By the way, in such an air conditioner, as shown in FIG. 3, the control panel 8 of the air conditioner is arranged in an independent section, and the control panel cooling fan 11 is attached to the section to take in the surrounding air. The control panel 8 is cooled by evacuating the air.

  However, particularly in the case of performing high-precision temperature and humidity control, in such a control panel cooling method, the temperature fluctuation of the outside air may affect the control equipment of the control panel, and the control performance may change. If the temperature fluctuation of ± 2 to 3 ° C. greatly affects the control device, it will hinder the realization of high-precision temperature and humidity adjustment.

  In view of the problems of the conventional air conditioner, the present invention cools the control device of the control panel with air that has been temperature-adjusted in advance, thereby reducing the temperature fluctuation inside the control panel and improving the performance of the control device. An object of the present invention is to provide an air conditioner that can stabilize and greatly improve the temperature and humidity control accuracy of the air conditioner.

In order to achieve the above object, an air conditioner according to a first aspect of the present invention includes a casing in which an air inlet and an air outlet are formed, a cooling coil disposed on the downstream side of the air inlet, In an air conditioner equipped with a reheater arranged on the downstream side and a blower that discharges air in the housing from the air discharge port, a part of the air whose temperature is adjusted by the cooling coil and the reheater is taken in A bypass flow path for recirculating the cooling coil is provided, and a control panel of the air conditioner is disposed in the bypass flow path.

In order to achieve the same object, an air conditioner according to the second aspect of the present invention includes a casing in which an air inlet and an air outlet are formed, a cooling coil disposed downstream of the air inlet, an air In an air conditioner equipped with a blower that discharges air in a housing from a discharge port, a bypass channel is provided that takes in part of the air whose temperature is adjusted by a cooling coil and recirculates it to the cooling coil , and the bypass channel is air-conditioned. A control panel of the apparatus is provided.

  In this case, a flow rate adjusting valve for adjusting the air flow rate of the bypass channel can be provided.

According to the air conditioners of the first and second aspects of the present invention, a bypass flow path is provided that takes in a part of the air whose temperature is adjusted by the cooling coil and the reheater or the cooling coil, and recirculates the air to the cooling coil. Since the control panel of the air conditioner is installed in the air conditioner, the control equipment of the control panel can be cooled with air precisely adjusted by the cooling coil and the reheater or the cooling coil. The fluctuation can be reduced to stabilize the performance of the control device, and the temperature and humidity control accuracy of the air conditioner can be greatly improved.
In addition, since the control device of the control panel is cooled by the air in the bypass passage, the control panel cooling fan and the cooling air inlet filter used in the conventional air conditioner are omitted, thereby reducing costs and saving energy. be able to.
Further, since heat generated from the control panel is removed by a cooling coil disposed downstream of the bypass flow path, there is no influence of heat outside the machine, and HEPA is provided at the air discharge port of the housing. By mounting the filter, it is possible to exhaust air into the clean room after cooling the control equipment of the control panel.

  In this case, by providing a flow rate adjusting valve that adjusts the air flow rate of the bypass flow path, the air flow rate of reflux to the bypass flow path can be adjusted, and the degree of cooling of the control panel can be adjusted.

  Embodiments of an air conditioner according to the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the air conditioner of the present invention.
This air conditioner includes a housing 3 in which an air inlet 1 and an air outlet 2 are formed, a cooling coil 4 disposed on the downstream side of the air inlet 1, and a downstream side of the cooling coil 4. The reheater 5 and the blower 6 that discharges the air in the housing 3 from the air discharge port 2 are provided.
This air conditioner takes in part of the air whose temperature has been adjusted by the cooling coil 4 and the reheater 5 and returns it to the cooling coil 4 again so that the air is returned to the vicinity of the air inlet 1 . A bypass flow path 7 is provided, and a control panel 8 of the air conditioner is disposed in the bypass flow path 7.

In the air conditioner, a refrigerator 9 for operating the cooling coil 4 is installed under the housing 3, and an air inlet 1 is formed in the lower part of the side wall.
A refrigerating machine 9 and a cooling coil 4 are disposed on the downstream side of the air inlet 1, and a reheater comprising a heater such as an electric heater, a hot water heater, a steam heater, or a refrigerant reheat coil system is disposed on the downstream side of the cooling coil 4. 5 is disposed.
Note that the reheater 5 is not essential, and the reheater 5 can be omitted as in the modified embodiment of the air conditioner of the present invention shown in FIG. Such an air conditioner is not excluded.

An air discharge port 2 is formed on the upper surface of the housing 3, and a blower 6 for discharging the air taken in from the air intake port 1 is installed on the upstream side of the air discharge port 2.
The air volume of the air conditioner can be set in a plurality of stages, for example, by manually switching the output of the blower 6.
A temperature sensor (not shown) is installed at an appropriate location on the downstream side of the blower 6 (appropriate location on the downstream side of the air inlet 1 in the case of the modified embodiment shown in FIG. 2). The control panel 8 controls the outputs of the cooling coil 4 and the reheater 5 based on the temperature of air detected by the sensor and the set temperature (in the case of the modified embodiment shown in FIG. ON / OFF is controlled).

The bypass flow path 7 is constituted by an air flow path that branches on the downstream side of the blower 6 and merges with the outside air on the downstream side of the air suction port 1. In this embodiment, the bypass flow path 7 is formed inside the housing 3 by the action of the blower 6. A part of the temperature-controlled air is returned to the vicinity of the inside of the filter 1 a of the air inlet 1.
A flow rate adjusting valve 10 for adjusting the air flow rate of the bypass flow path 7 is provided at the inlet of the bypass flow path 7.
In the present embodiment, the flow rate control valve 10 is adjusted to adjust the flow rate of the air recirculated to the bypass flow path 7 and adjust the degree of cooling of the control panel 8.

On the other hand, the control panel 8 includes a control device and a power supply device, and since these generate heat, cooling is necessary.
In the present embodiment, the control panel 8 is disposed between the flow rate adjusting valve 10 of the bypass flow path 7 and the air inlet 1, so that the temperature is adjusted by the cooling coil 4 and the reheater 5. The control device of the control panel 8 is cooled by the air returned to the bypass flow path 7.
The air whose temperature has been adjusted by the cooling coil 4 and the reheater 5 is temperature-controlled, for example, with an accuracy of ± 1/100 ° C., and the control panel 8 is controlled with such precisely temperature-adjusted air. By cooling the equipment, the temperature fluctuation inside the control panel can be reduced, the performance of the control equipment can be stabilized, and the temperature and humidity control accuracy of the air conditioner can be improved.
In this case, since the control panel 8 is disposed on the upstream side of the cooling coil 4, the heat generated from the control panel 8 is removed by the cooling coil 4, and there is no influence of heat on the outside of the machine. By mounting a HEPA filter or the like on the air outlet 2 of the body 3, the air after cooling the control device of the control panel 8 can be exhausted, for example, into a clean room.

Thus, the air conditioner of the present embodiment includes a housing 3 in which the air inlet 1 and the air outlet 2 are formed, a cooling coil 4 disposed on the downstream side of the air inlet 1, and the cooling coil 4. In the air conditioner provided with the reheater 5 disposed on the downstream side and the blower 6 that discharges the air in the housing 3 from the air discharge port 2, the temperature is adjusted by the cooling coil 4 and the reheater 5. By providing a bypass flow path 7 that takes in part of the air and returns it to the cooling coil 4 again, and the control panel 8 of the air conditioner is disposed in the bypass flow path 7, the cooling coil 4 and the reheater 5 (see FIG. When the reheater 5 is not provided as in the modified embodiment of the air conditioner of the present invention shown in FIG. 2, the control panel 8 can be precisely cooled by the air whose temperature has been adjusted by the cooling coil 4). Reduce the temperature fluctuation inside the control panel to stabilize the performance of the control equipment, and It can be greatly improved temperature and humidity control accuracy of the device.
Further, since the control device of the control panel 8 is cooled by the air in the bypass passage 7, the control panel cooling fan 11 and the cooling air inlet filter 12 used in the conventional air conditioner as shown in FIG. The cost can be reduced and energy can be saved.
Further, since heat from the control panel 8 is removed by the cooling coil 4 on the downstream side, there is no influence of heat outside the machine, and a HEPA filter is mounted on the air outlet 2 of the housing 3. By doing so, the air after cooling the control device of the control panel 8 can be exhausted into the clean room.

  Further, by providing the flow rate adjusting valve 10 that adjusts the air flow rate of the bypass flow path 7, it is possible to adjust the flow rate of air returned to the bypass flow path 7 and adjust the degree of cooling of the control panel 8.

  As mentioned above, although the air conditioner of this invention was demonstrated based on the Example, this invention is not limited to the structure described in the said Example, The structure is suitably changed in the range which does not deviate from the meaning. be able to.

  The air conditioner of the present invention cools the control device of the control panel with air whose temperature has been precisely adjusted in advance, thereby reducing the temperature fluctuation inside the control panel and stabilizing the performance of the control device. It can be used widely and suitably as an air conditioner that requires temperature and humidity control.

It is sectional drawing which shows one Example of the air conditioner of this invention. It is sectional drawing which shows the modification Example of the air conditioner of this invention. It is sectional drawing which shows an example of the conventional air conditioner.

DESCRIPTION OF SYMBOLS 1 Air inlet 1a Filter 2 Air outlet 3 Case 4 Cooling coil 5 Reheater 6 Blower 7 Bypass flow path 8 Control panel 9 Refrigerator 10 Flow control valve 11 Control panel cooling fan 12 Inlet filter

Claims (3)

A housing formed with an air inlet and an air outlet, a cooling coil disposed downstream of the air inlet, a reheater disposed downstream of the cooling coil, and an air outlet In an air conditioner including a blower that discharges air in a housing, a bypass flow path is provided that takes in a part of the air whose temperature is adjusted by a cooling coil and a reheater and recirculates the air to the cooling coil. An air conditioner characterized in that a control panel of the air conditioner is disposed in the air conditioner. In an air conditioner including a housing in which an air inlet and an air outlet are formed, a cooling coil disposed on the downstream side of the air inlet, and a blower that discharges air in the housing from the air outlet An air conditioner characterized in that a bypass flow path for taking in part of the air whose temperature is adjusted by the cooling coil and returning it to the cooling coil is provided, and a control panel of the air conditioner is disposed in the bypass flow path.   The air conditioner according to claim 1 or 2, further comprising a flow rate adjusting valve for adjusting an air flow rate of the bypass flow path.

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