JP3728095B2 - Air conditioning system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic device in a fan driving device when an indoor unit is configured by connecting a fan unit including a fan and a fan driving device for driving the fan and an indoor heat exchanger unit including an indoor heat exchanger. The present invention relates to an air conditioning system in which a substrate is set to a predetermined temperature or lower.
[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 for blowing the conditioned air provided in each conditioned room to the conditioned room, and the conditioned air in the indoor units 10a and 10b are supplied to the blowout chambers 60a and 60b. It has the ducts 100a and 100b to be guided, a ventilation unit 31 provided with a heat recovery unit (not shown) for ventilating indoors and recovering heat of the ventilation air.
[0007]
Note that the indoor units 10a, 10b is divided into an indoor heat exchanger unit provided with a fan unit and an indoor heat exchanger having a fan drive unit for driving the fan and the fan, the fan units及 beauty indoor heat exchanger unit is accommodated in cubes casing of the same size.
[0008]
[Problems to be solved by the invention]
However, since the fan drive device is an electronic component, the temperature of the electronic substrate must be set to 60 ° C. or lower, but it may be difficult to set the temperature below this temperature depending on the temperature of the ceiling. there were.
[0009]
SUMMARY OF THE INVENTION An object of the present invention is to provide a highly reliable air conditioning system in which the temperature of an electronic board in a fan drive device is inexpensive and easily set to a predetermined temperature or less.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, an invention according to claim 1 is directed to an indoor unit that performs heat exchange between a refrigerant and room air, a duct that is provided in a plurality of conditioned rooms, and that is disposed under a ceiling or under a floor. an air conditioning system comprising and a blowing chamber is connected for blowing air from the indoor unit to be air-conditioned room, the indoor unit includes a fan unit having a fan for blowing air to the intake room air, this circulating the indoor air and the refrigerant that has suction fan unit and indoor heat exchange unit with a built-in indoor heat exchanger for heat exchange, a connection structure stacked vertically, the indoor heat exchange unit, the indoor heat exchanger A fan driving device is provided for driving the fan by being positioned on the inlet / outlet side of the refrigerant to be used, and the fan driving device includes a base chamber in which an electronic base is disposed and a power transformer chamber in which a power transformer is disposed. Is divided into, the base chamber is housed within the indoor heat exchange unit, power transformer chamber is provided in a state protruding to the outside of the indoor heat exchanger unit, inexpensive temperature of the electronic board in the fan drive, and , It is characterized in that the reliability is improved by making it easy and efficiently below a predetermined temperature.
[0012]
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.
[0013]
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.
[0014]
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, which serve as blowout openings when the conditioned air is blown into the conditioned room. 10a, 10b, branch chambers 50a, 50b and blow-out chambers 60a, 60b, etc. are connected to form ducts 100a, 100b that form air flow paths, indoor ventilation, and heat (not shown) that collects the heat of the ventilation air It is comprised by the ventilation unit 30 etc. which were equipped with the collection device.
[0015]
The indoor unit 10a in the air conditioner for the first floor has an appearance as shown in FIG. 2 (a), is disposed in a closed space such as under the stairs, and the closed space 40a functions as a suction chamber. are doing.
[0016]
As a result, there is no need to provide a separate suction chamber, so that the manufacturing cost can be reduced.
[0017]
Moreover, the indoor unit 10b in the air conditioner for the second floor has an appearance as shown in FIG. 2 (b) and is arranged on the back of the ceiling so as to suck in the indoor air through the suction chamber 40b. It has become.
[0018]
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.
[0019]
The indoor units 10a and 10b are configured by fan units 11a and 11b that intake indoor air and indoor heat exchanger units 12a and 12b that perform heat exchange between the intake indoor air and refrigerant.
[0020]
The fan units 11a and 11b are provided with fans (not shown), and the indoor heat exchanger units 12a and 12b are provided with fan drive devices 13a and 13b for driving the indoor heat exchanger and the fans.
[0021]
3 and 4 show a horizontal sectional view and a side sectional view of the indoor unit 10a, respectively, and the fan driving device 13a is provided on the refrigerant inlet / outlet portion 15A side of the indoor heat exchanger 14. In the following description, the configuration of the indoor unit will be described using the indoor unit 10a provided under the stairs as an example.
[0022]
The fan drive device 13a is divided into a power transformer chamber 16A in which a power transformer 18 and the like having a large amount of heat are disposed, and a substrate chamber 16B in which an electronic substrate 17 and the like having a specified upper limit temperature are disposed. A housing 19 is made.
[0023]
The fan driving device 13a is disposed on the refrigerant inlet / outlet portion 15A side of the indoor heat exchanger 14, the substrate chamber 16B is accommodated in the indoor heat exchanger unit 12a, and the power transformer chamber 16A is included in the indoor heat exchanger unit. It is provided by jumping out from 12a.
[0024]
Thus, the substrate chamber 16B in which the electronic substrate 17 is housed is cooled by the heat of the indoor heat exchanger 14, and the heat of the power transformer 18 makes it difficult to raise the temperature of the substrate chamber 16B.
[0025]
Further, since the power transformer 18 is provided so as to jump out of the indoor units 10a and 10b, the indoor air heat exchanged by the indoor units 10a and 10b does not increase in temperature due to the heat of the power transformer 18, and heat exchange is performed. It is possible to prevent a decrease in efficiency.
[0026]
The fan driving device 13a is arranged on the refrigerant inlet / outlet portion 15A side of the indoor heat exchanger 14 because the arrangement width of the refrigerant pipe in this portion is wider than the hairpin portion 15B on the opposite side, and a large dead space is generated. Therefore, the dead space is effectively used to reduce the size of the device.
[0027]
【The invention's effect】
As described above, according to the first aspect of the present invention, the indoor unit that performs heat exchange between the refrigerant and the room air, the duct that is provided in the plurality of conditioned rooms, and that is disposed under the ceiling or under the floor. In the air conditioning system, the indoor unit includes a fan unit that includes a fan that sucks and blows in indoor air, and a blowout chamber that blows out air from the indoor unit to the conditioned room. The indoor heat exchange unit with a built-in indoor heat exchanger that exchanges heat between the indoor air sucked in by the fan unit and the refrigerant is connected to the top and bottom, and the indoor heat exchange unit circulates to the indoor heat exchanger. A fan driving device is provided for driving the fan positioned on the refrigerant inlet / outlet side. The fan driving device includes a base chamber in which an electronic base is disposed and a power transformer chamber in which a power transformer is disposed. Is divided into, the base chamber is housed within the indoor heat exchange unit, since the power transformer chamber is provided in a state protruding to the outside of the indoor heat exchanger unit, inexpensive and easily to efficient the temperature of the electronic substrate can be below at a constant temperature in the fan drive, the reliability is improved. In addition, if the fan drive device is located on the refrigerant inlet / outlet side of the indoor heat exchanger, the arrangement width of the refrigerant pipe in this part becomes wider than the hairpin part on the opposite side, and a large dead space is generated. The dead space can be effectively used to reduce the size of the apparatus.
[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 a perspective view of the indoor unit.
FIG. 3 is a horizontal sectional view of the indoor unit.
FIG. 4 is a side sectional view of the indoor 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 units 11a, 11b Fan units 12a, 12b Indoor heat exchanger units 13a, 13b Fan drive unit 14 Indoor heat exchanger 16A Power transformer chamber 16B Substrate chamber 17 Electronic substrate 18 Power transformers 20a, 20b Outdoor units 60a, 60b Blowing chamber 100a, 100b Duct

Claims (1)

An indoor unit that exchanges heat between the refrigerant and room air is provided in a plurality of conditioned rooms, and is connected by a duct disposed under the ceiling or under the floor to blow air from the indoor unit into the conditioned room. An air conditioning system comprising an outlet chamber
The indoor unit includes a fan unit having a fan for blowing air to the intake room air, the the indoor air and the refrigerant that has an intake in the fan unit and the indoor heat exchanger units containing an indoor heat exchanger for heat exchange , It is connected to the top and bottom,
The indoor heat exchange unit is provided with a fan driving device for driving the fan located on the inlet / outlet side of the refrigerant circulating in the indoor heat exchanger,
The fan driving device is divided into a base room in which an electronic base is provided and a power transformer room in which a power transformer is provided. The base room is accommodated in an indoor heat exchange unit, and the power transformer is provided. An air conditioning system, wherein a chamber is provided in a state of protruding outside the indoor heat exchanger unit .

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