JP2003106569A - Outdoor unit of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor unit of an air conditioner capable of sufficiently cooling an electric part required to cool and preventing temperature rise. SOLUTION: This outdoor unit of the air conditioner has a machinery chamber 7 formed by partitioning a unit body 4 by a partition plate 8 on which a bleeder 9 for ventilation is provided, and provided with an outdoor side heat exchanger 2, a blower chamber 5 in which an outdoor blower 3 is housed and a machinery chamber air intake port 11, an electrical equipment substrate 6 housed in the machinery chamber and on which electrical equipment 10 is mounted and a ventilation control plate arranged between this electrical equipment substrate 6 and the machinery chamber air intake port 11, and provided with a diffuser 13 to face against the electrical equipment 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor unit for an air conditioner, and more particularly to an outdoor unit for an air conditioner having an improved air cooling effect on electrical components.

[0002]

2. Description of the Related Art Conventionally, an outdoor unit of an air conditioner generally has a structure as shown in FIGS. 8 and 9, and the outdoor unit 31 has a blower chamber 34 in which a heat exchanger 32 and a blower 33 are housed. And a machine room 35 with a partition plate 36. As shown in FIG. 10, in the upper part of the machine room 35, an operation control element 37a such as a capacitor, which hardly generates heat during use, and a relatively large amount of heat, such as a GTR (a giant transistor for inverter) and a rectifier, are generated. An electrical component board 38 to which electrical components 37 including an electrical component 37b are attached is installed in a horizontal state.

In such an outdoor unit 31 of the conventional air conditioner, the heat exchanger 3 is rotated by the rotation of the blower 33.
The refrigerant flowing in 2 is cooled, and the rotation of the blower 33 causes the blower chamber 34 to have a negative pressure, so that an air flow from the machine room 35 to the blower chamber 34 is generated. This air flow enters through the outside air intake 39 provided in the machine room 35,
5 so as to rise up and hit the electric component board 38 to cool the operation control element 37a and the electric components 37b, which are the electric components 37, and then to flow into the blower chamber 34 through the vent hole 40 provided in the partition plate 36. It has become.

However, since the cooling air flow uniformly hits the electric components 37 and cools them, the cooling of the electric components 37b accompanied by relatively large heat generation is insufficient, and the electric components 3
There is a problem that the temperature of 7b rises.

[0005]

Therefore, there has been a demand for an outdoor unit of an air conditioner capable of sufficiently cooling electric components that require cooling and preventing a temperature rise.

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide an outdoor unit of an air conditioner capable of sufficiently cooling electric components requiring cooling and preventing a temperature rise. .

[0007]

In order to achieve the above object, according to one aspect of the present invention, a unit main body accommodating an outdoor heat exchanger, an outdoor blower and the like, and the unit main body for ventilation. Formed by a partition plate provided with a ventilation port, the outdoor heat exchanger, a machine room provided with a fan room and a machine room air intake that house the outdoor fan, and is housed in this machine room, Air comprising an electrical component board to which electrical components are attached, and a ventilation control plate provided between the electrical component substrate and the air inlet of the machine room and provided with a blowout port facing the electrical components. An outdoor unit for a harmony machine is provided. As a result, it is possible to sufficiently cool the electrical components that require cooling, and prevent the temperature from rising.

[0008] In a preferred example, the air outlet provided in the ventilation control plate is provided so as to face an electric component accompanied by heat generation of electric components. As a result, the electrical components that generate heat are intensively and positively cooled, and the temperature rise is prevented.

In another preferred example, the ventilation control plate is provided in contact with at least one of the machine room portion of the unit body, the partition plate, and the machine room front cabinet provided on the front surface of the machine room. To be This reinforces the strength of the machine room front cabinet and the ventilation control plate.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of an outdoor unit for an air conditioner according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a sectional view of an outdoor unit of an air conditioner according to the present invention, and FIG. 2 is a front view showing a casing front plate of the outdoor unit of an air conditioner according to the present invention with a part of a front plate removed. is there.

As shown in FIGS. 1 and 2, the outdoor unit 1 of the air conditioner according to the present invention includes an outdoor heat exchanger 2,
It has a unit body 4 in which the outdoor blower 3 and the like are housed. The unit main body 4 includes a blower chamber 5 in which the outdoor heat exchanger 2 and the outdoor blower 3 are stored, and a machine chamber 7 defined on one side of the unit main body 4 and in which the electrical component substrate 6 is stored. The fan room 5 and the machine room 7 are provided by a partition plate 8. The partition plate 8 is provided with a vent hole 9 that allows air to flow from the machine room 7 to the blower room 5.

An electric component 10 is attached to the electric component board 6, and the electric component 10 is used for an operation control element 10a such as a capacitor, an inverter shunt resistance element, and a blower motor that hardly generate heat during use. DC
It includes an electric component 10b such as a DC motor driving element when a motor is used, which is accompanied by relatively large heat generation. Further, the electric component board 6 is vertically attached to the partition plate 8 as shown in FIGS. 3 and 4.

The machine room 7 has an outside air intake 11 in the machine room.
A ventilation control plate 12 is provided between the outside air intake 11 of the machine room and the electrical equipment substrate 6 so as to partition a part of the machine room 7. The ventilation control plate 12 is provided with a blowout port 13, which is opened so as to face an electric component 10b, such as an inverter shunt resistance element, which requires cooling and which generates a relatively large amount of heat. ing.

In order to guide the cooling air flow and promote cooling, the electrical component substrate is preferably mounted vertically, but it may be mounted horizontally depending on the mounting space and the like. In addition, it is preferable to appropriately change the number of outlets and the opening area depending on the number of electric components to be mounted and the amount of heat generation thereof.

Further, as shown in FIGS. 1 and 2, a heat sink 14 is provided on the partition plate 8, and the heat sink 14 has an electric component which generates heat larger than that of the electric component 10b. For example, the GTR 10c is mounted so as to be in surface contact with the GTR 10c so that heat generated by the GTR 10c can be radiated. Heat sink 14
Is made of a material having a high thermal conductivity, such as an aluminum material, and has a rectangular shape. A plurality of fins 14a is erected on one side of the rectangular shape and a flat surface 14b on which the GTR 10c is attached is formed on the other side. I am doing it. Further, the heat sink 14 is attached to the partition plate 8, and the fins 14a are located on the blower chamber 5 side, while the fins
4b is formed on the partition plate 8 and is exposed to the machine room 7 side from the mounting opening 8a shown in FIGS. 3 and 4, and the plane 14b exposed to the machine room 7 side is located in the machine room 7 as described above. G
TR10c is attached.

As shown in FIGS. 3 and 4, a heat sink cover 15 is provided above the heat sink 14. The heat sink cover 15 has an opening 15 a that matches the ventilation port 9, a ventilation bulge 15 b that changes the direction of the air flow, and an outlet 15 c that opens into the blower chamber 5.

Reference numeral 16 is a main body air intake port, and 17 is a main body air outlet port.

Next, cooling and condensation of the refrigerant using the outdoor unit of the air conditioner as the condensation side will be described.

As shown in FIGS. 1 and 2, the refrigerant, which has been compressed by a compressor (not shown) housed in the machine room 7 and has a high temperature, is taken in from the main air intake 16 by the rotation of the outdoor blower 3. Is passed through the outdoor heat exchanger 2 and is cooled and condensed by the air blown from the main body air outlet 17. Further, when the outdoor blower 3 is rotated, the inverter control circuit operates, so that the electrical components 10 generate heat, so that heat radiation is required.

On the other hand, when the outdoor blower 3 rotates, as shown in FIGS. 1 and 2, the inside of the blower chamber 5 becomes negative pressure, so that air is taken in from the machine room air intake 11. Further, as shown in FIG. 2, the air taken into the machine room 7 becomes a cooling air flow, flows through the machine room 7, and a part of the air reaches the ventilation control plate 12. The cooling air flow reaching the ventilation control plate 12 is throttled by a blowout port 13 provided in the ventilation control plate 12 to increase its flow velocity, and the blowout port 13
Is sprayed onto an electric component 10b, such as an inverter shunt resistance element, which is provided so as to face with and is accompanied by relatively large heat generation, and this electric component 10b is intensively and positively cooled. The cooling airflow that has cooled the electric component 10b smoothly flows along the electric component board 6 provided in a vertical state,
The air flows into the blower chamber 5 through the heat sink cover 15 from the ventilation port 9 and the opening 15a.

Further, other air taken into the machine room 7 flows into the heat sink cover 15 through the air gap g, the air vent 9, and the opening 15a as shown in FIG. However, the cooling air flow is the fin 14a.
The GTR 10 mounted on the flat surface 14b of the heat sink 14 through the heat sink 14 in a heat transfer manner as it flows downward from above the heat sink 14 along the heat sink 14.
c is effectively cooled.

As described above, in the process of the cooling air flow flowing through the machine room 7, the cooling air blown from the blowout port 13 provided in the ventilation control plate 12 cools the electric component 10b intensively and positively. Therefore, the temperature does not rise because it is cooled effectively. Unlike the conventional case where the electric components mounted on the electric component substrate are uniformly blown to cool the electric components, the electric components requiring cooling can be intensively blown to be cooled.

Next, a second embodiment of the outdoor unit of the air conditioner according to the present invention will be described with reference to the accompanying drawings.

FIG. 5 is a perspective view showing a casing top plate and a front cabinet of an outdoor unit of an air conditioner according to the present invention with the casing top plate and front cabinet removed, and FIG. 6 is a casing top of an outdoor unit of an air conditioner according to the present invention. It is a perspective view which removes and shows a part of board and a casing front board.

As shown in FIGS. 5 and 6, the outdoor unit 1A of the air conditioner according to the present invention includes an outdoor heat exchanger 2
A has a unit main body 4A in which two outdoor blowers 3A and the like are housed. The unit main body 4A has an outdoor heat exchanger 2A and an outdoor blower 3A, and a blower chamber 5
A and a machine room 7A which is defined on one side of the unit main body 4A and accommodates the electric component board 6A are provided.
A and the machine room 7A are separated by a partition plate 8A.
The partition plate 8A is provided with a vent hole 9A for allowing air to flow from the machine room 7A to the blower room 5A.

The electrical component board 6A has an electrical component 10A on it.
The electrical components 10A are attached to the operation control element 1 such as a capacitor that hardly generates heat during use.
0Aa, an electrical component 10 such as an inverter shunt resistance element, a DC motor drive element, etc., which generates relatively large heat.
It contains Ab. In addition, electrical parts such as GTR
Cooling may be performed using a heat sink as in the first embodiment, or may be performed by another method. In some cases, cooling may be performed by mounting the heat sink on the electrical component substrate 6A as with the electrical component 10Ab. You can go.

As shown in FIGS. 6 and 7, the electrical component board 6A is vertically attached to the board mounting plate 21 provided between the machine chamber 4Aa of the unit body 4A and the partition plate A8.

Further, as shown in FIGS. 5 and 6, the machine room 7A is provided with a machine room outside air intake port 11A,
A ventilation control plate 12A is provided between the outside air intake 11A of the machine room and the electrical equipment substrate 6A so as to completely partition the machine room 7.
Is provided. This ventilation control plate 12A has an outlet 1
3A is provided, and as shown in FIG. 7, the air outlet 13A is opened to face electrical components that require cooling, for example, electrical components 10Ab that generate a relatively large amount of heat.

Further, as shown in FIG. 7, the ventilation control plate 12A is screwed to the board mounting plate 21A, and is connected to the machine chamber 4Aa of the unit body 4A, the partition plate 8A, and the front cabinet 22A. At least one, for example, all of the machine room front cabinets 22Aa provided are in contact with each other via the seal member 23A. Thereby, the strength of the machine room front cabinet 22Aa and the ventilation control plate 12A can be reinforced.

Reference numeral 16A is a main body air intake, 17
A is a main body air outlet, and 18A is a top plate.

Next, cooling and condensation of the refrigerant using the second embodiment as the condensation side will be described.

As shown in FIG. 5, the outside air intake 11 of the machine room
The air taken into the machine room 7A from A becomes a cooling air flow, flows through the machine room 7A, and reaches the ventilation control plate 12A. The cooling air flow reaching the ventilation control plate 12A is throttled by the blowout port 13A provided in the ventilation control plate 12A to increase the flow velocity, and a relatively large amount of heat is provided facing the blowout port 13A. It is sprayed on the electric parts 10Ab,
The electric component 10Ab is intensively and positively cooled.
The cooling airflow that has cooled the electric components 10Ab smoothly flows along the electric component board 6A provided in the vertical state, and then flows into the blower chamber 5 through the ventilation port A9.

As described above, the electric component 10Ab is intensively and positively cooled and effectively cooled, so that the temperature does not rise.

[0035]

As described above, according to the present invention,
It is possible to provide an outdoor unit of an air conditioner that can sufficiently cool electric components that need to be cooled and can prevent a temperature rise.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment of an outdoor unit of an air conditioner according to the present invention.

FIG. 2 is a front view showing a casing front plate of a first embodiment of an outdoor unit of an air conditioner according to the present invention with a part of a front plate of the casing removed.

FIG. 3 is a side sectional view showing the vicinity of the electric component board of the outdoor unit of the air conditioner according to the first embodiment of the present invention.

FIG. 4 is a perspective view showing an electrical component board of the outdoor unit of the air conditioner according to the first embodiment of the present invention.

FIG. 5 is a perspective view showing the outdoor unit of the air conditioner according to the present invention with the casing top plate and front cabinet of the second embodiment removed.

FIG. 6 is a perspective view showing a casing top plate and a casing front plate of a second embodiment of an outdoor unit of an air conditioner according to the present invention with a part of the casing top plate removed.

FIG. 7 is a plan view showing an attached state of a ventilation control plate of the second embodiment of the outdoor unit of the air conditioner according to the present invention.

FIG. 8 is a front view showing a front cabinet of an outdoor unit of a conventional air conditioner with a part thereof removed.

FIG. 9 is a cross-sectional view of an outdoor unit of a conventional air conditioner.

FIG. 10 is a perspective view showing a mounting state of an electric component board of an outdoor unit of a conventional air conditioner.

[Explanation of symbols]

1 Outdoor unit of air conditioner 2 outdoor heat exchanger 3 outdoor blowers 4 unit body 4a Machine room of unit body 5 blower room 6 Electrical component board 7 Machine room 8 partition boards 9 vents 10 Electrical components 10a Operation control element 10b electric parts 10c Electrical Parts (GTR) 11 Machine room outside air intake 12 Ventilation control plate 13 Outlet 14 heat sink 14a fin 14b plane 15 Heat sink cover 15a opening 15b bulge 15c outlet 16 body air intake 17 Body air outlet

Claims (3)

[Claims] 1. A unit main body accommodating an outdoor heat exchanger, an outdoor blower and the like, and a unit plate formed by partitioning the unit main body by a partition plate provided with a ventilation hole for ventilation. An air blower room containing an outdoor blower and a machine room with a machine room air intake, an electric component board housed in this machine room and to which electrical components are attached, this electric component board and the machine room air intake Placed between the entrances,
An outdoor unit for an air conditioner, comprising: a ventilation control plate provided with a blowout port facing the electrical components. 2. The outdoor unit for an air conditioner according to claim 1, wherein the air outlet provided in the ventilation control plate comprises:
An outdoor unit for an air conditioner, which is provided so as to face an electric component that accompanies heat generation of electrical components. 3. The outdoor unit for an air conditioner according to claim 1, wherein the ventilation control plate is a machine room part of the unit body, a partition plate, and a machine room front cabinet provided on the front surface of the machine room. An outdoor unit for an air conditioner, which is provided in contact with at least one of the above.