JPH0742023Y2 - Air conditioner - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly to an air conditioner having a total heat exchanger.

[0002]

2. Description of the Related Art A typical conventional air conditioner will be described with reference to FIG. The air conditioner includes an air supply fan 21 that supplies air indoors and a return air fan 22 that recirculates indoor air.
A cold / hot water coil 23, a total heat exchanger 24, a main filter 25 for filtering air, a return air pre-filter 26 provided in a return air path for returning indoor air, and an outside air intake 34. The external air pre-filter 27 is provided. Next to the coil unit 30 including the cold / hot water coil 23, there is a section 31 in which the main filter 25 and the return air pre-filter 26 are installed. Further, a compartment 32 provided with the total heat exchanger 24 is located adjacent to the compartment 31, and an exhaust duct connection port 33 and an outside air intake port 34 are provided at the site of the compartment 32.

The operation of the conventional air conditioner will be briefly described. The air supply to the room is sucked from the compartment 31 through the main filter 25 and the hot / cold water coil 23 to the air supply fan 21, is pressurized, and then supplied. It is supplied to the air-conditioned room (not shown) through the air duct connection port 35. On the other hand, the return air from the air-conditioned room is sucked into the return air fan 22 through the return air duct connection port 36, is boosted in pressure, and then is diverted, and the one side is exhausted as a total heat exchanger 24 and connected to an exhaust duct. After being discharged to the outside through the mouth 33, the other one is mixed with the outside air and then supplied again into the air-conditioned room through the supply path. The outside air supplied as fresh air into the room to be air-conditioned passes from the outside air intake 34 through the outside air pre-filter 27 and passes through the total heat exchanger 24, or bypasses the total heat exchanger 24 and is mixed with the return air. Then, the air is supplied to the room through the air supply route.

[0004]

As described above, in the conventional air conditioner, the exhaust duct connection port 33 and the outside air intake port 34 are arranged in this order in the section 32 adjacent to the section 31. An outside air pre-filter 27 is installed near the outside air intake 34. That is, the outside air pre-filter 27 is installed at a position separated from the section 31 including the main filter 25 and the return air pre-filter 26. Therefore, when replacing each filter 25, 26, 27 or performing maintenance inspection, the main filter 25
Although the return air pre-filter 26 can be performed in the compartment 31, the outside air pre-filter 27 must be performed in the compartment 32. For this reason, there has been a problem that filter replacement and maintenance and inspection work are complicated.

The present invention has been made in view of the above-mentioned points, and an object thereof is to install an outside air prefilter in a compartment adjacent to a filter chamber in which a main filter and a return air prefilter are installed. An object of the present invention is to provide an air conditioner in which a prefilter for outside air can be replaced or maintained and inspected from a filter chamber.

[0006]

In order to achieve the above-mentioned object, an air conditioner of the present invention comprises an air supply fan for supplying indoor air, an exhaust fan for discharging indoor air to the outside, and an outside air intake. A pre-filter for outside air provided at the inlet, an outside air introduction fan for introducing outside air, a main filter for filtering air, a cold / hot water coil, a total heat exchanger, and a return air passage for returning indoor air A pre-filter for return air provided, the main filter and the pre-filter for return air are installed in a filter chamber, the pre-filter for outside air is installed in a section adjacent to the filter chamber, and the section and the filter chamber An opening is provided in a partition wall for partitioning and, and a lid for opening and closing the opening is provided so that the pre-filter for outside air can be attached to and detached from the filter chamber.

[0007]

According to the present invention having the above-described structure, the lid provided on the partition wall between the filter chamber in which the main filter and the return air prefilter are installed and the compartment in which the outside air prefilter is installed By opening, the pre-filter for outside air in the compartment can be replaced or serviced from the filter chamber. Therefore, it is possible to maintain all the filters provided in the air conditioner in the filter chamber, and this maintenance work becomes extremely easy.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an air conditioner according to the present invention will be described below with reference to FIGS.

FIG. 1 is a diagram showing the overall construction of the air conditioner of the present invention. The air conditioner is an air supply fan 1 for supplying air into the air-conditioned room with a variable air flow rate for variable speed operation by an inverter. An exhaust fan 2 for discharging the air in the air-conditioned room to the outside, an outside air fan 3 for introducing the outdoor air,
A main filter 4 for filtering air, a cold / hot water coil 5, and a total heat exchanger 6 are provided. The return air path for returning the air in the air-conditioned room is configured so as to be guided to the main filter 4 via the return air pre-filter 7 without passing through the return air fan, and the exhaust gas is branched from the return air path to the exhaust damper. The exhaust fan 2 is introduced into the exhaust fan 2 via the total heat exchanger 6 and is discharged from the exhaust duct 9 to the outside by the exhaust fan 2. Further, the outside air is introduced into the outside air fan 3 from the outside air intake 10, the outside air introduction path is branched downstream of the outside air fan 3 as shown in FIG. 1, and the outside air is passed through the total heat exchanger 6 and the outside air damper 11 is passed through the outside air damper 11. , Bypassing the path leading to the main filter 4 or the total heat exchanger 6, the damper 1 for the outside air total heat exchanger bypass circuit
It is configured such that the air is supplied to the room through a path that passes through 2 to the main filter 4 and then a path for supplying air.

The operation of the air conditioner will be briefly described below.
The air supply to the room is sucked into the air supply fan 1 through the main filter 4 and the hot / cold water coil 5, and the pressure is increased.
It is supplied to the room to be air-conditioned (not shown) via 3. on the other hand,
The return air from the room passes through the return air duct 14, passes through the pre-filter 7 for recirculation air, and then splits. At 2, the air is discharged from the exhaust duct 9 to the outside of the room, and the other one is mixed with the outside air and then supplied to the inside of the room again via the supply path. The outside air supplied as fresh air into the room passes through the outside air prefilter 15 from the outside air intake 10, is introduced into the outside air fan 3, and is further mixed with the return air through the total heat exchanger 6 and the outside air damper 11. After being supplied to the room through the supply air path, or after being mixed with the return air from the outside air fan 3 through the outside air total heat exchanger detour damper 12, it is supplied to the room through the supply air path. Supplied.

FIG. 2 is a cross-sectional view showing the positional relationship among the devices of the air conditioner of the present invention. In FIG. 2, the hot and cold water coil 5
Adjacent to the coil unit 16 including the main filter 4
A filter chamber 17 including the return air pre-filter 7 is installed. Further, a compartment 18 in which the total heat exchanger 6 is installed is arranged adjacent to the filter chamber 17, and the exhaust fan 2, the outside air fan 3, and the outside air pre-filter 15 are installed in the compartment 18. An opening 19a is formed in the partition wall 19 that partitions the compartment 18 from the filter chamber 17, and the lid body 2 is configured to close the opening 19a so that the opening 19a can be opened and closed.
0 is provided.

As shown in FIGS. 3 and 4, the lid 20 is made of a plate-like body, and a handle 41 is fixed to the upper surface of the plate-like body. The lid 20 is detachably attached to the partition wall 19 by four setscrews 42 provided on the upper, lower, left and right sides.

Thus, in the filter chamber 17, the lid 20 can be removed from the partition wall 19 by removing the set screw 42, and then the outside air prefilter 15 can be taken out from the opening 19a. The outside air prefilter 15 can be inspected or replaced in the filter chamber 17.

In the embodiment shown in FIGS. 3 and 4, the lid is constructed so that it can be attached and detached by a set screw, but the lid may be constructed so as to be openable and closable by a hinge or the like, or it can be slidable. The guide may be provided to open and close.

[0015]

As described above, according to the air conditioner of the present invention, the partition between the filter chamber in which the main filter and the return air pre-filter are installed and the compartment in which the outside air pre-filter is installed are provided. By removing the lid provided on the wall, it is possible to replace or maintain the outside air prefilter in the compartment. Therefore, it is possible to maintain all the filters installed in the air conditioner in the filter chamber, and the maintenance work becomes extremely easy.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of an air conditioner according to the present invention.

FIG. 2 is a cross-sectional view showing an arrangement relationship of each device in an embodiment of the air conditioner according to the present invention.

FIG. 3 is a view showing an embodiment of the air conditioner according to the present invention and is a view taken along the arrow III in FIG.

FIG. 4 is a perspective view showing details of a lid in the air conditioner according to the present invention.

FIG. 5 is a perspective view showing a positional relationship among devices of a conventional air conditioner.

[Explanation of symbols]

 1 Air supply fan 2 Exhaust fan 3 Outside air fan 4 Main filter 5 Cold / hot water coil 6 Total heat exchanger 7 Return air pre-filter 8 Exhaust damper 9 Exhaust duct 10 Outside air intake 11 Outside air damper 12 Outside air total heat exchanger For bypass circuit Damper 13 Air supply duct 14 Return air duct 15 Outside air pre-filter 16 Coil unit 17 Filter chamber 18 Partition 19 Partition wall 20 Lid 41 Handle 42 Set screw

Claims (1)

[Scope of utility model registration request] 1. An air supply fan for supplying air to the room, an exhaust fan for discharging the air in the room to the outside, a prefilter for outside air provided at an outside air intake, and an outside air introducing fan for introducing outside air, A main filter for filtering air, a cold / hot water coil, a total heat exchanger, and a return air pre-filter provided in a return air path for returning indoor air are provided, and the main filter and the return air pre-filter are provided. Is installed in a filter chamber, the outside air pre-filter is installed in a partition adjacent to the filter chamber, an opening is provided in a partition wall that partitions the partition from the filter chamber, and a lid body that opens and closes the opening. And an external air pre-filter that can be attached to and detached from the filter chamber.