JPS634895Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of an indoor unit of an air conditioner.

A conventional indoor unit of an air conditioner is configured by providing a single ventilation passage inside the outer casing, installing a heat exchanger inside this ventilation passage, and installing a blower to blow air into the ventilation passage.
Heating and cooling was performed by heating a heat exchanger and directing the blower's discharge downwards indoors during heating, and by cooling the heat exchanger and directing the blower discharge upwards indoors during cooling. During heating, the temperature distribution in the room is as shown in Figure 1, the closer to the ceiling the higher the temperature, and the closer to the floor the lower the temperature.
There is a feeling of discomfort when the head is hot and the feet are cold.
Another drawback is that heat loss increases because areas other than the living space are heated.

This invention was made in view of the above-mentioned drawbacks, and the purpose is to provide an indoor unit of an air conditioner that provides a good indoor temperature distribution during heating.

An example of this invention is shown below in Figures 2 and 3.
To explain according to the drawings, 1 in the drawings is an air conditioner, which is composed of an indoor unit 2 installed indoors and an outdoor unit 3 installed outdoors. Indoor unit 2
There is a first ventilation passage 5 in the upper part of the outer casing 4 and a second ventilation passage in the lower part.
A ventilation passage 6 is provided, and a first heat exchanger 7 and a second heat exchanger 8 are separately provided in the first ventilation passage and the second ventilation passage. 6 each has a blower 9 formed by a cross-flow fan.
is provided with a blade 10, an electric motor (not shown), and a blade casing 12, and the discharge portion of each ventilation passage 5, 6 is provided with a wind direction plate 13, 14 that can change the discharge direction. The discharge port 5a of the first ventilation path 5 is provided at the upper end of the front surface of the outer casing 4, and the second
The outlet 5b of the ventilation passage 6 is provided at the lower end of the front surface of the outer casing 4, and 4a and 4b are intake ports of the first and second ventilation passages 5 and 6, and the first heat exchanger 7 and the second The heat exchanger 8 includes a solenoid valve 16 installed in parallel with a throttle resistor 15.
It is connected through. The outdoor unit 3 includes a refrigerant heater 17, a compressor 18, an outdoor heat exchanger 19, and a throttle resistor 20 connected to the first heat exchanger 7 in series, and is connected to the second heat exchanger 8. In addition to forming a refrigeration cycle, the outdoor heat exchanger 1
9 and a bypass circuit 21 that bypasses the throttle resistance section 20 are connected via a solenoid valve 22, and the refrigerant heater 1
A burner 23 is provided at the 7th section to heat this, and an outdoor fan 24 is provided at the outdoor heat exchanger 19 section to blow air thereto. Reference numeral 25 denotes a temperature sensing element installed in the upper part of the room, which controls the burner 23 and the solenoid valve 16 via a control circuit 26.

To explain the operation of the device configured as described above, first, during heating, when the room temperature is low such as in the early stage of heating, when performing heating (hereinafter referred to as heating and heating), this is detected by the temperature sensing element 25.
Detected by
3 is combusted, and the solenoid valve 22 is also turned on and opened. Further, the wind direction plates 13 and 14 are moved so that the discharge direction is downward. As a result, the refrigerant is heated by the refrigerant heater 17 and evaporated to become a high-temperature, high-pressure gas refrigerant, as shown by the broken line, and is sucked into and discharged from the compressor 18, and passes through the bypass circuit 21 to the second heat exchanger 8,
Further, it passes through the electromagnetic valve 16 to reach the first heat exchanger 7 and returns to the refrigerant heater 17. At this time, by heating the first and second heat exchangers 7 and 8 and operating the blowers 9 and 9, heat is exchanged and the room is heated and heated.
At this time, the indoor temperature distribution will be as shown in Figure 1, as in the past, but when the temperature in the upper part of the room rises to a predetermined temperature, the temperature detection element 25 detects this and utilizes the heat in the heated upper part of the room. The system then switches to heat utilization operation (hereinafter referred to as heat utilization operation), which heats the lower part of the room. That is, when the temperature in the upper part of the room reaches a predetermined temperature, the electromagnetic valve 16 is turned off and closed by the temperature detection element 25, the combustion of the burner 23 is stopped, and the wind direction plate 14 is moved while leaving only the side of the wind direction plate 14 as it is. Move it so that it is discharged upwards in the chamber. As a result, the refrigerant flows as shown by the dashed line, and since the throttling resistor 15 is interposed, the second heat exchanger 8 acts as a condenser, and the first heat exchanger 7 acts as an evaporator. The refrigerant that has passed through the first heat exchanger 7 passes through the refrigerant heater 17 and the compressor 18, passes through the bypass circuit 21, and reaches the second heat exchanger 8. At this time, by operating the blowers 9, 9, the air cooled through the first heat exchanger 7 is discharged upward into the room, and the air heated through the second heat exchanger 8 is discharged into the room. It is discharged downward. Furthermore, by forming the air passages 5 and 6 above and below, cooled air and heated air do not mix. As a result, the temperature distribution in the room is almost uniform as shown in Figure 4, and the amount of heat from the temperature difference (shaded area in the diagram) compared to the conventional one is used effectively, eliminating discomfort in the living space and saving energy. It also becomes. On the other hand, during cooling, the solenoid valve 16 is turned on and opened, combustion of the burner 23 is turned off, and the solenoid valve is turned off and closed. Also,
Both of the wind direction plates 13 and 14 are moved so that the discharge direction is upward in the room. As a result, the refrigerant passes through the compressor 18, the outdoor heat exchanger 19, the throttle resistor 20, the second heat exchanger 8, the solenoid valve 16, the first heat exchanger 7, and the refrigerant heater 17 in order, as shown by the solid line. Then return to the compressor 18. At this time, the outdoor heat exchanger 19 acts as a condenser, and the first and second heat exchangers 7,
8 acts as an evaporator. This blower 9,9
By operating and blowing air, the air is cooled and discharged upward into the room to cool the room.

In the above embodiment, the blowers 9, 9 are provided separately, but if, for example, a cross-flow fan is divided and used in common, and the direction of blowing air is changed, the same effect can be achieved even with a single blower.

As described above, this invention comprises an outer casing in which a first ventilation passage and a second ventilation passage are provided, a blower provided in each of the first ventilation passage and the second ventilation passage,
The present invention is provided with a first heat exchanger provided in the first ventilation passage and acting as an evaporator of a refrigeration cycle, and a second heat exchanger provided in the second ventilation passage and acting as a condenser of a refrigeration cycle, the first ventilation passage being disposed at an upper portion and the second ventilation passage being disposed at a lower portion, and the wind in the first ventilation passage being discharged upward inside the room and the wind in the second ventilation passage being discharged downward inside the room,
To provide an indoor unit for an air conditioner which can effectively utilize the heat from the upper part of the room heated by the heater to cool the upper part of the room while heating the lower part of the room, thereby making the temperature distribution in the room uniform, has a simple air duct, is easy to assemble, and is comfortable and has little heat loss.

[Brief explanation of the drawing]

Figure 1 is a conventional indoor temperature distribution diagram, Figure 2 is a refrigerant circuit diagram showing an embodiment of this invention, Figure 3 is a perspective view of the indoor unit, and Figure 4 is also based on this invention. It is a distribution map showing indoor temperature. In addition, in the figure, 1 is an air conditioner, 2 is an indoor unit, and 4 is an indoor unit.
is an outer casing, 5 is a first ventilation path, 6 is a second ventilation path, 7 is a first heat exchanger, 8 is a second heat exchanger, 9 is a blower,
15 is an aperture resistor, 16 is a solenoid valve, and 25 is a temperature detection element.

Claims (1)

[Scope of utility model registration request] an outer casing provided with a first ventilation path and a second ventilation path; a blower provided in each of the first ventilation path and the second ventilation path; and an evaporator of a refrigeration cycle provided in the first ventilation path. a first heat exchanger acting as a refrigeration cycle; and a second heat exchanger provided in the second ventilation passage and acting as a condenser of the refrigeration cycle; the first heat exchanger and the first heat exchanger. The second heat exchanger is connected via a throttle resistor and a solenoid valve installed in parallel with the throttle resistor, and during heating operation, the solenoid valve is activated by the detection output of the temperature detection element installed at the top of the room. An indoor unit of an air conditioner characterized by controlling opening and closing.