JPH0478654A - Unit cooler - Google Patents

Abstract

PURPOSE:To suppress the temperature rise of an inverter in a unit cooler provided on its interior side with an inverter chamber for enclosing the inverter for driving equipment on both interior and exterior sides by taking return air from interior cooling into the inverter chamber to enable the ventilation of the inverter chamber. CONSTITUTION:A unit cooler is divided into an exterior side 1B with a condenser 8 and a condenser fan 9 installed therein, and an interior side 1A partitioned from the exterior side 1B by a partition wall 16. Inside the interior side 1A, there is provided an inverter chamber 10 isolated by a partition 17. In this case, an inlet 13 for dividing the flow of return air, returned through a duct 2 from the cooled interior, into the inverter chamber 10 is provided at the lower part of the inverter chamber 10, and the return air outlet 15 is provided at the partition 17 placed between the inverter chamber 10 and the interior side 1A. A route 21 for accelerating the diversion of return air is further provided inside the duct 2, in the vicinity of the inlet 13. The inverter 11 is thus cooled by taking return air into the inverter chamber 10 so as to suppress the temperature rise of the inverter chamber 10 caused by the exothermicity of the inverter 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a unit cooler incorporating an inverter.

(Prior Art) In FIG. 7 showing a plan view of a conventional unit cooler for a vehicle and FIG. 8 showing a BB sectional view thereof, the unit cooler 1 is shown on the outdoor side where a condenser 8 and a condenser blower 9 are installed. It is divided into an indoor side IA separated from an outdoor side IB by a partition wall 16, and an additional partition 17 inside the indoor side IA.
There are 10 inverter rooms isolated from each other.

On the indoor side IA, there is an intake port 3 that sucks in the return air that returns from the cooled interior of the car through the duct 2, and an air filter 4 installed inside the intake port 3, as well as a heat exchanger that cools the sucked air. 5, a blower 6 that sends cooled air into the vehicle, a compressor 12, an inverter 11 housed in an inverter chamber 10, and terminal blocks and piping whose details are omitted.

Further, on the outdoor side IB, a condenser 8 for dissipating heat carried from the heat exchanger 5 through piping whose details are omitted, and a condenser blower 9 for cooling the condenser 8 are provided.

Here, air flows in the order of the duct 2 - the intake floor 3 - the factory filter 4 - the heat exchanger 5 - the blower 6 - the blowout lower.

(Problems to be Solved by the Invention) When the unit cooler 1 having such a configuration is installed in a vehicle, there are significant restrictions on the installation location.
If the inverter chamber 10 is made smaller for the purpose of downsizing, the internal temperature of the inverter chamber 10 will rise due to the heat of the inverter 11, which may impair the characteristics and life of the parts.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a unit cooler that can suppress a temperature rise in an inverter chamber, can be made smaller in size, and can improve reliability.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a unit cooler provided with an inverter chamber housing a heat exchanger, a compressor, a blower, a condenser, a condenser blower, and an inverter for driving these devices. , an inlet for introducing return air into the inverter chamber and an outlet for discharging the return air are provided.

(Function) By cooling the inverter room by diverting chilled litter air into the inverter room, it is possible to suppress an increase in inverter temperature by 1, and provide a compact unit cooler with improved reliability.

(Example) An embodiment of the present invention will be described based on the drawings.

FIG. 1 is a plan view showing an embodiment of a unit cooler of the present invention, and FIG. 2 is a cross-sectional view taken along the line AA in FIG.

In FIGS. 1 and 2, an inlet 13 for diverting return air into the inverter chamber is provided at the lower part of the inverter chamber 10, and an outlet 15 for the return air is provided at a partition 17 between the inverter chamber 10 and the indoor side IA.

Naturally, a diverting air filter 14 is attached to the inlet 13. Furthermore, a hood 2 is installed in the duct 2 near the population 13 to promote the division of return air.

In the unit cooler 1 having such a configuration, in addition to the route through which the return air flows in the order of the duct 2 - the intake chamber 3 - the air filter 4 - the heat exchanger 5 - the blower 6 - the blowout lower, there are also ducts 2 -
A separate route is generated in which the air flows in the same order from the hood 21 to the inlet 13 to the diverting air filter 14 to the inverter chamber 10 to the outlet 15 to the heat exchanger 5, and the inverter chamber 10 receives the return air that always returns from the cold inside of the car. The inverter 11 can be cooled. Therefore, there is no need to take up a large space in the inverter chamber 10 in order to suppress the temperature rise in the inverter chamber 10 due to heat generated by the inverter 11, and the unit cooler 1 can be made smaller. It is also possible to improve the characteristics of 11 and extend the lifespan.

3 and 4 are sectional views of a unit cooler showing other embodiments of the present invention, and are equivalent views to FIG. 2.

In FIG. 3, the return air passes through the intake port 3 and the air filter 4 and enters the indoor side IA, and then passes through the inlet 13 at the bottom of the inverter chamber 10 and enters the inverter chamber 10.
The structure is such that the inverter 11 is cooled by cooling the inverter 11. In this case, the diverting air filter 14 used in Figure 2
can be omitted. In addition, as shown in Figure 4, the inlet 1 for diversion
3 may be provided at the lower part of the partition I7. At this time, the hood 2LA can promote diversion.

5 and 6 are sectional views of a unit cooler showing other different embodiments of the present invention, and correspond to FIG. 2.

In FIG. 5, a temperature sensor I8 is provided in the inverter chamber 10, and a drive device (not shown in detail) that operates according to the temperature detected by the temperature sensor 18 operates the inlet 1 for diversion.
3. If the temperature of the inverter chamber 10 rises, the throttle 19 is opened; if the temperature does not rise, the throttle 19 is opened.
This is to adjust the amount of return air to be diverted.

In FIG. 6, instead of the aperture 19 in FIG. 5, a drive device (not shown in detail), which also operates according to the temperature detected by the temperature sensor 18, operates the diversion duct 20 provided in the duct 2. This is to adjust the amount of return air to be diverted.

It is easily possible to provide the throttle 19 and the diverter tact 20 on the return air outlet side of the inverter chamber 10. In addition, if a foot 21 is provided at the 9th point and the 13th section, the diversion can be further promoted.

[Effects of the Invention] According to the above invention, in a unit cooler provided with an inverter chamber housing a heat exchanger, a compressor, a blower, a condenser, a condenser blower, and an inverter for driving these devices, a return to the inverter chamber is provided. By providing an inlet to take in air and an outlet to let it escape, and by splitting the return air into the inverter room to cool the inverter room, it is possible to suppress the temperature rise of the inverter, make the unit cooler smaller, and improve reliability. There is an effect that can be achieved.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the unit cooler of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a configuration showing a second embodiment of the unit cooler of the present invention. 4 is a block diagram showing another embodiment of the unit cooler of the present invention, FIG. 5 is a block diagram showing a different embodiment of the present invention, and FIG. 6 is a still different embodiment of the two-knit cooler of the present invention. A configuration diagram showing an example, FIG. 7 is a plan view showing an example of a conventional unit cooler,
FIG. 8 is a sectional view taken along line BB in FIG. 7. IA...indoor side, IB...outdoor side, 2...duct, lO...inverter room, 11...inverter, j3 population, 14...diversion air filter 15...outlet, 16...・Bulkhead, 17...
・Partition, 18...Temperature sensor, 19...
・Aperture, 20...Diversion duct. Agent Patent Attorney Kensuke ChikaFigure 3Figure 1Figure 4Figure 2Figure 2Figure Figure Figure Figure

Claims (1)

[Claims] An indoor side that includes a heat exchanger, a compressor, and an air blower, an outdoor side that includes a condenser and a condenser air blower, and an inverter that houses an inverter that drives equipment on the indoor side and the outdoor side in the indoor side. An inverter-shaped unit cooler provided with a chamber, characterized in that return air from indoor cooling of the unit cooler is taken into the inverter chamber and ventilation is performed by a unit cooler blower.