JPS6313096B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention provides a cooling/heating machine in which a cooling wind tunnel and a heating wind tunnel are installed above and below, and the room air at that time is kept in a light breeze state during either heating or cooling operation. This relates to an air conditioner/heater that circulates air to reduce the temperature difference between the upper and lower parts of the room, thereby providing a comfortable heating and cooling environment.

FIG. 1 shows a conventional air-conditioning/heating machine of this kind. In this figure, 1 is the main body of the air-conditioning/heating machine (hereinafter simply referred to as the main body). 2 is a lower suction port provided on the rear wall of the main body 1; 3 is a heating blower; 4 is a heating heat exchanger; A wind outlet, 6 a cooling heat exchanger, 7 a cooling blower, 8 an upper cold air outlet provided on the top wall of the cooling wind tunnel C at the upper part of the main body 1 formed by the partition plate B; Reference numeral 9 indicates an upper suction port provided on the rear wall of the main body 1, 10 a louver provided at the upper cold air outlet 8, 11 a floor surface, and 12 a ceiling surface.

In the above configuration, during heating, the heating blower 3
The indoor air taken in from the lower suction port 2 of the main body 1 due to the rotation of the main body 1 is heated by the heating heat exchanger 4 in the heating wind tunnel A, and is sent to the floor surface 11 from the hot air outlet 5 in front of the heating wind tunnel A. It blows out as high-temperature wind diagonally downward toward.

Further, during cooling, the indoor air taken in from the upper suction port 9 of the main body 1 by the rotation of the cooling blower 7 is cooled by the cooling heat exchanger 6 in the cooling wind tunnel C. Cold air is blown out obliquely upward toward the ceiling surface 12 from the upper cold air outlet 8. At this time, by operating a louver 10 provided at the upper cold air outlet 8, the direction in which the cold air is blown can be changed.

By the way, in order to measure comfort during heating,
It is necessary to reduce the vertical temperature distribution in the room, and to do this, the blowing direction of hot air must be directed as downward as possible, but lowering the blowing direction increases the floor surface temperature, which may cause problems such as discoloration of rugs, etc. Moreover, if the blowing angle is made small, the hot air blown out will not reach far along the floor surface but will rise immediately, resulting in a disadvantage that the difference in temperature between the top and bottom inside the room will become large.

In addition, during cooling, the louver 10 provided at the upper cold air outlet 8 can be operated as appropriate, but if you happen to forget to do so, you may feel discomfort due to the direct blowing of cold air.

This invention was made in order to eliminate the drawbacks of the above-mentioned conventional devices.When cooling, only the blower in the heating wind tunnel is used, and when heating, on the other hand, only the blower in the cooling wind tunnel is used. By operating the air at a notch in air volume, indoor air is circulated in a gentle breeze during both heating and cooling operations, thereby improving the indoor temperature environment under energy-saving conditions. An embodiment of the present invention will be described below with reference to FIGS. 2 to 4.

In these figures, the same or corresponding parts as in FIG. 1 are designated by the same reference numerals, and their explanations will be omitted.

During the heating operation of the air conditioner of the present invention shown in FIG. After the hot air is exchanged in the heat exchanger 4, it is blown out as high-temperature air diagonally forward toward the floor 11 from the hot air outlet 5 in front of the heating wind tunnel A. However, at this time, the indoor air sucked in from the upper suction port 9 by the variable speed blower 7a, which was switched to low speed operation at the same time, is not exchanged with heat because the cooling heat exchanger 6 is stopped, and is directly blown into the upper part of the main body 1. The air is blown diagonally forward from the outlet 8 toward the ceiling surface 12, flows along the ceiling surface 12, then descends toward the floor surface 11, and flows through the hot air outlet 5 in front of the heating wind tunnel A to the floor surface 11. Since the high-temperature wind blown towards the room is suppressed from the upper layer, this high-temperature wind is prevented from rising, and therefore reaches far into the room along the floor surface 11.

As a result, the temperature distribution in the room is as shown by the solid line in Figure 4. Compared to the conventional example shown by the dotted line, the temperature near the floor increases and the temperature in the upper part of the room decreases. The difference in temperature between the top and bottom becomes very small.

Similarly, during cooling shown in FIG. 3, the variable speed blower 7a in the cooling wind tunnel C is driven at high speed,
Indoor air sucked in from the upper suction port 9 on the rear wall of the main body 1 undergoes heat exchange in the cooling heat exchanger 6, and then flows from the upper cold air outlet 8 of the main body 1 through the louver 10 toward the ceiling surface 12. Cold air blows diagonally forward. However, at this time, the indoor air sucked in from the lower suction port 2 by the variable speed blower 3a, which was switched to low-speed operation at the same time, is not exchanged with heat because the heating heat exchanger 4 is stopped, and the indoor air is directly transferred to the main body 1. Since warm air is blown out from the air outlet 5, indoor air is circulated in a light breeze state during this cooling operation, thereby providing a comfortable cooling environment.

In the above embodiments, a floor-standing type was described, but a wall-hung type, a window-hung type, etc. may also be used. Further, the upper cold air outlet 8 provided in the cooling wind tunnel C does not necessarily need to be opened toward the ceiling surface 12. Note that the control means for controlling as described above can be easily achieved by switching the circuit in conjunction with switching between cooling and heating.

As explained above, in the air conditioner of the present invention, during cooling operation, the other blower in the inactive state is
In addition, during heating operation, the other blower, which is inactive, is rotated at low speed and used to circulate indoor air, so the difference in temperature between the top and bottom of the room at that time is reduced, resulting in comfortable heating and cooling effects under energy-saving conditions. There are advantages that can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the operating state of a conventional air conditioner/heater, FIG. 2 is a sectional view showing the heating operating state of the air conditioner according to the present invention, FIG. 3 is a sectional view similarly showing the cooling operating state, and FIG. FIG. 2 is a diagram showing the difference in indoor temperature distribution state during heating operation between the air conditioner according to the present invention and a conventional air conditioner. In the figure, 1 is the air conditioner main body, 3a and 7a are variable speed blowers, 4 is a heating heat exchanger, 5 is a hot air outlet, 6 is a cooling heat exchanger, 8 is an upper cold air outlet,
A is a heating wind tunnel, and C is a cooling wind tunnel. In addition,
The same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1 Built-in variable speed blower and heating heat exchanger,
A wind tunnel for heating indoor air with a warm air outlet in the front. and a wind tunnel for cooling indoor air, which is equipped with a variable speed blower and a cooling heat exchanger, and whose upper cold air outlet is opened above the hot air outlet, are installed above and below with a partition plate in between. During heating, the internal blower is operated at high speed under the operating condition of the heat exchanger in the heating wind tunnel, and only the blower in the cooling wind tunnel is operated at low speed. An air-conditioning/heating machine characterized by being provided with a control means for operating an internal blower at high speed under the operating state of a heat exchanger in a wind tunnel, and for operating only a blower in a heating wind tunnel at a low speed.