JP3744684B2 - Air conditioning system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air conditioning system that is provided on the back of a ceiling to ventilate indoor air and facilitates maintenance and inspection of a ventilation unit that recovers heat of the air.
[0002]
[Prior art]
Conventionally, in order to cool and heat a plurality of rooms, it is common to provide an air conditioner corresponding to each room. However, this requires a large number of air conditioners, which is uneconomical.
[0003]
Therefore, a multi-type air conditioner that performs air conditioning by providing an indoor unit in each room and supplying refrigerant from the single outdoor unit to the indoor unit has begun to be provided on the market.
[0004]
However, even in this multi-type air conditioner, the same number of indoor units as the conditioned rooms are required, and if the number of conditioned rooms is large, the total piping distance of the refrigerant pipes becomes long, so that the refrigerant is circulated. However, it is necessary to use an outdoor unit with a large capacity, and there is a problem of lack of workability and maintainability due to a complicated refrigerant piping route.
[0005]
From such a viewpoint, the applicant of the present application has proposed an air conditioner having a configuration as shown in FIG. 5 in Japanese Patent Application No. 9-618.
[0006]
The air conditioner includes a compressor (not shown) that compresses the refrigerant and the like, and is installed outside the outdoor units 20a and 20b, behind the ceiling, under the stairs, and the like to exchange heat between the refrigerant and room air. The indoor units 10a and 10b, the blowout chambers 60a and 60b that are provided in the respective conditioned rooms and blown out the conditioned air into the conditioned rooms, and the conditioned air in the indoor units 10a and 10b are supplied to the blowout chambers 60a and 60b. The ducts 100a and 100b to be guided, the ventilation unit 31 provided with a fan or the like (not shown) for ventilating the room and collecting the heat of the ventilation air.
[0007]
[Problems to be solved by the invention]
However, since the ventilation unit 31 is disposed behind the ceiling of a narrow room such as a bathroom or toilet, there is a problem that it is difficult to secure a work space for performing maintenance, inspection and repair of the ventilation unit 31. It was.
[0008]
In addition, since the fan or the like is screwed to the casing of the ventilation unit 31 with a screw or the like, the screw must be removed when replacing the fan, which makes it difficult to work in the narrow working space described above. There's a problem.
[0009]
SUMMARY OF THE INVENTION An object of the present invention is to provide an air conditioning system that can easily perform maintenance and inspection of a ventilation unit even in a narrow work space.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, an invention according to claim 1 includes an indoor unit that performs heat exchange between a refrigerant and room air, and a duct that is provided in a plurality of conditioned rooms and disposed under the ceiling or under the floor. A blowout chamber connected to the indoor unit, a ventilation unit provided on the back of the ceiling for ventilating indoor air and recovering heat of the air, and a maintenance inspection window opened and closed when performing maintenance inspection of the ventilation unit The air conditioning system has a fan that ventilates indoor air, a heat recovery unit that recovers heat of the air to be ventilated, and an internal air passage. A spacer that is appropriately smaller than the fan, and a fan, a spacer, and a heat recovery device are accommodated in this order, and a lid that is appropriately larger than the fan provided at a position corresponding to the position where the spacer is accommodated. And by Rutotomoni a lid which fan is enabled and out, and a separately provided enclosure lid for electrical apparatus for driving a fan in a part of the lid, also easily ventilated in a narrow working space The feature is that the unit can be maintained and inspected.
[0011]
In the invention according to claim 2, the fan and the heat recovery device are covered with the heat insulating material, are unitized and housed without being fixed to the housing, and the spacer is formed of the heat insulating material. It is characterized by heat recovery and easy handling of each member.
[0012]
According to a third aspect of the present invention, the spacer is formed in a wedge shape, and the thick portion thereof is mounted so as to be in the position of the lid that allows the fan to enter and exit , thereby facilitating the insertion and removal of the spacer. In some cases, the spacer, the fan, and the heat recovery unit are in close contact with each other so that no air leakage occurs.
[0013]
In the invention according to claim 4, the lid is screwed to the housing with a plurality of screws, and the screws are screwed in the same direction so that the screws can be easily removed from the maintenance inspection window. It is characterized by that.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. In addition, about the same structure as the past, description is suitably abbreviate | omitted using the same code | symbol.
[0015]
FIG. 1 is a conceptual diagram when the air conditioning system according to the present invention is installed in a house, and is composed of an air conditioner for the first floor and an air conditioner for the second floor. Is the same except that is different.
[0016]
Each air conditioner is provided in a conditioned room such as an outdoor unit 20a, 20b provided with a compressor (not shown) for compressing refrigerant, indoor air 10a, 10b for exchanging heat between the indoor air and the refrigerant, and a living room. Branch chambers 50a and 50b for distributing conditioned air from the blowout chambers 60a and 60b and the indoor units 10a and 10b to the tuned rooms. 10a, 10b, branch chambers 50a, 50b and blowout chambers 60a, 60b are connected to form ducts 100a, 100b that form an air flow path, a ventilation unit 30 that ventilates the room and collects the heat of the ventilation air. Etc.
[0017]
The indoor unit 10 a in one ulcer of the air conditioner is disposed within a closed space, such as under the stairs, the closed space 40a is acting as a suction chamber.
[0018]
As a result, there is no need to provide a separate suction chamber, so that the manufacturing cost can be reduced.
[0019]
In the present embodiment, the outside air and the room air flow into the closed space 40a and the suction chamber 40b below the stairs at a constant ratio regardless of whether it is cooling or heating, but the ratio is changed. In such a case, a damper device or the like may be provided for these.
[0020]
The structure of the ventilation unit 30 is demonstrated with reference to FIG.2 and FIG.3. Fig.2 (a) shows the side view of the ventilation unit 30, and FIG.2 (b) has shown the bottom view. FIG. 3 shows a cross-sectional view.
[0021]
The ventilation unit 30 includes a heat recovery unit 33 that exchanges heat between ventilation air and refrigerant, a fan 34 that sucks air from a toilet or the like and exhausts the air while passing through the heat recovery unit 33, and between the heat recovery unit 33 and the fan 34. It has a wedge-shaped spacer 35 or the like sandwiched between and is housed in a housing 36.
[0022]
The heat recovery unit 33 and the fan 34 are covered with a heat insulating member such as polystyrene and unitized, and the spacer 35 is also an air that ventilates the inside with a hollow frame formed of a heat insulating member such as polystyrene. Can pass through.
[0023]
A cover 37a for maintenance / inspection slightly larger than the fan 34 and a cover 37b for an electrical device (not shown) for driving the fan 34 are screwed to the housing 36, and are attached to both sides of the maintenance / inspection cover 37a. Is provided with a cover lid 38a, 38b.
[0024]
The screws 39 for stopping the lids 37a and 37b are all perpendicular to the lids 37a and 37b.
[0025]
An exhaust duct 70 is connected downstream of the housing 36, and a refrigerant inlet / outlet that circulates through the heat recovery unit 33 is provided on the upstream side.
[0026]
The exhaust top 71 and the outside air inlet 80 of the exhaust duct 70 are covered with an insect net (not shown) so that insects and the like do not enter the room.
[0027]
Next, the detailed configuration of the ventilation unit 30 in the above configuration will be described with reference to FIG.
[0028]
The heat recovery unit 33 has no moving parts and rarely fails, but the fan 34 and the electrical equipment are overwhelmingly more likely to fail than the heat recovery unit 33. For this reason, the maintenance inspection target of the ventilation unit 30 is mainly the fan 34 and the electrical equipment. Therefore, in the following description, a case where maintenance inspection of the fan 34 is performed will be described as an example.
[0029]
The ventilation unit 30 is disposed behind the ceiling so that the lids 37a and 37b are on the ceiling side, and a maintenance inspection window M is provided on the ceiling corresponding to the lids 37a and 37b. The size of the maintenance inspection window M is appropriately larger than the maintenance inspection lid 37a (see FIG. 4A).
[0030]
When performing maintenance inspection of the ventilation unit 30 in such a state, the maintenance inspection window M is first opened. Accordingly, the maintenance inspection lid 37a and the electrical device lid 37b appear.
[0031]
The maintenance inspector opens the maintenance inspection lid 37a and the electrical equipment lid 37b depending on the work purpose, but the screws 39 fixing these lids 37a and 37b are all in the same direction (the direction from the ceiling toward the ventilation unit 30). Therefore, the screw 39 can be easily removed. FIG. 4A is a side view showing a state in which the lids 37a and 37b are removed in this way.
[0032]
When the fan 34 is replaced, as shown in FIG. 4B, the maintenance inspection lid 37a is opened and the spacer 35 is pulled out. The spacer 35 is formed in a wedge shape, and the thicker one is positioned on the maintenance inspection lid 37a side, so that it can be easily pulled out.
[0033]
Then, the fan 34 is moved laterally in the direction of the heat recovery unit 33 as shown in FIG.
[0034]
As a result, the entire fan 34 appears between the left and right mekra lids 38a, 38b. Therefore, as shown in FIG. 4 (d), the fan 34 is pulled out and removed, and maintenance inspection or replacement is performed.
[0035]
Further, when the fan 34 is returned to the original position, the above-described procedure is reversed. At that time, since the spacer 35 is wedge-shaped, it is easy to insert the spacer 35 and it is in close contact with the heat recovery unit 33 and the fan 34, so that the air to be vented does not leak.
[0036]
【The invention's effect】
As described above, according to the first aspect of the present invention, the ventilation unit accommodates the fan, the spacer, the heat recovery device, and these, and a lid that is appropriately larger than the fan is provided at a position corresponding to the position where the spacer is accommodated. In addition , since it is composed of a housing with a lid for electrical equipment for driving the fan in part of the lid, and a maintenance inspection window provided on the ceiling, maintenance inspection of the ventilation unit is easy even in a narrow work space Etc. can be performed.
[0037]
In the invention according to claim 2, the fan and the heat recovery device are covered with a heat insulating material, and the spacer is formed of a heat insulating material, and these are unitized. In addition, heat recovery can be performed efficiently.
[0038]
In the invention according to claim 3, since the spacer is formed in a wedge shape and the thick part is mounted so as to be in the position of the lid where the fan can enter and exit , the spacer can be easily put in and out and the spacer can be inserted at the time of insertion. And the fan and the heat recovery device are in close contact with each other so that no air leakage occurs.
[0039]
In the invention according to claim 4, since the lid is screwed to the housing by a plurality of screws and the screws are screwed in the same direction, the screws can be easily removed from the maintenance inspection window. It becomes possible to perform maintenance and inspection.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of an air conditioning system applied to the description of an embodiment of the present invention.
FIG. 2 is an external view of a ventilation unit.
FIG. 3 is a cross-sectional view of a ventilation unit.
FIG. 4 is a diagram showing a fan take-out procedure in the ventilation unit.
FIG. 5 is a configuration diagram of an air conditioning system applied to a description of a conventional technique.
[Explanation of symbols]
10a, 10b Indoor unit 20a, 20b Outdoor unit 30 Ventilation unit 33 Heat recovery unit 34 Fan 35 Spacer 36 Case 37a Maintenance lid 37b Electrical equipment lid 38a, 38b Mekkura lid 39 Screws 50a, 50b Branch chamber 60a, 60b Blowing chamber M Maintenance inspection window

Claims (4)

An indoor unit that performs heat exchange between the refrigerant and room air, a blowout chamber that is provided in a plurality of conditioned rooms and connected to the indoor unit by a duct disposed behind the ceiling or under the floor, and provided on the back of the ceiling An air conditioning system comprising a ventilation unit that ventilates indoor air and collects heat of the air, and a maintenance inspection window that is opened and closed when performing maintenance inspection of the ventilation unit.
A fan formed to be appropriately smaller than the maintenance inspection window and ventilating indoor air;
A heat recovery unit that recovers heat from the air to be ventilated;
An internal air flow path, a spacer that is appropriately smaller than the fan, and
The fan, the spacer, and the heat recovery unit are stored in this order, and are a lid that is appropriately larger than the fan provided at a position corresponding to the storage position of the spacer, and the fan is moved in and out by pulling out the spacer. Rutotomoni a lid made possible, the air conditioning system and having a separately provided enclosure lid for electrical apparatus for driving the fan in a part of the lid.   The fan and the heat recovery unit are covered with a heat insulating material, unitized, and stored without being fixed to the housing, and the spacer is formed of a heat insulating material. 1. The air conditioning system according to 1. The air conditioning system according to claim 1 or 2, wherein the spacer is formed in a wedge shape and is mounted so that a thick part thereof is a position of a lid that allows the fan to enter and exit .   4. The lid is screwed to the casing by a plurality of screws, and the screws are screwed in the same direction so that the lid can be removed from the maintenance inspection window. The air conditioning system of any one of Claims.

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