JPS634894Y2 - - Google Patents

Description

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

Conventional indoor units of air conditioners are constructed 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.The heat exchanger is not used during heating. Air conditioning and heating were performed by heating and directing the blower's discharge downwards indoors, and during cooling, by cooling the heat exchanger and directing the blower's discharge upwards indoors, but especially during heating, indoor temperature As the distribution is shown in Figure 1, the closer you are to the ceiling, the higher the temperature, and the closer you are to the floor, the lower the temperature, causing discomfort such as a hot head and cold feet, and heating in areas other than the living space. This resulted in a drawback of increased heat loss.

This invention was made in view of the above-mentioned drawbacks, and the object is to provide an indoor unit for an air conditioner that provides a good indoor temperature distribution, especially 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
A first ventilation passage 5 and a second ventilation passage 6 are provided in the outer casing 4, and a first heat exchanger 7 and a second heat exchanger 8 are separately installed in the first ventilation passage and the second ventilation passage. A blower 9 formed of a cross-flow fan is provided and blows air to the first ventilation path 5 and the second ventilation path 6, respectively,
The blades 10 and electric motor 11 are shared, and blade casings 12 are formed respectively, and the discharge portions of the respective ventilation passages 5 and 6 are provided with wind direction plates 13 and 14 that can change the discharge direction. The first heat exchanger 7 and the second heat exchanger 8 are connected via a throttle resistor 15 and a solenoid valve 16 arranged in parallel. 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. A bypass circuit 21 that forms a refrigeration cycle and bypasses the outdoor heat exchanger 19 and the throttle resistor 20 is connected via a solenoid valve 22, and a burner 23 is provided in the refrigerant heater 17 portion to heat it. , an outdoor fan 24 is installed in the outdoor heat exchanger 19 portion to blow air thereto.
is provided. 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 indoor temperature is low as in the early stage of heating and heating (hereinafter referred to as heating) is performed, this is detected by the temperature detection element 25. The solenoid valve 16 is turned on and opened, the burner 23 is burned, and the solenoid valve 22 is also turned on and opened. Also,
The wind direction plates 13 and 14 are moved so that the discharge direction is downward. As a result, the refrigerant is heated and evaporated by the refrigerant heater 17 as shown by the broken line to become a high-temperature, high-pressure gas refrigerant, which is sucked into the compressor 18 and discharged, and then passes through the bypass circuit 21 to the second heat exchanger 8 and then to the solenoid valve 16. It reaches the first heat exchanger 7 through the refrigerant heater 17 and returns to the refrigerant heater 17. At this time, the first and second heat exchangers 7 and 8 are heated and the blower 9 is operated to exchange heat and heat the room, but the indoor temperature distribution at this time is the same as in the conventional case, as shown in Figure 1. It will look like this, but
When the temperature in the upper part of the room rises to a predetermined temperature, the temperature detection element 25 detects this and heats the lower part of the room by using the heat in the heated upper part of the room. ). That is, when the temperature in the upper part of the room reaches a predetermined temperature, the solenoid valve 16 is activated by the temperature detection element 25.
It is turned off and closed, the burner 23 stops burning, and the wind direction plate 14 is moved so that the air is discharged upward into the room, leaving only the side of the wind direction plate 14 as it is. Thereby, the refrigerant flows as shown by the dashed line, and since the throttle 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 is transferred from the refrigerant heater 17 and compressor 18 to the bypass circuit 21.
and reaches the second heat exchanger 8. At this time, by operating the blower 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 ejected downward into the room. It is discharged towards the target. 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. In addition, the wind direction plate 13,1
4 so that the discharge direction is upward in the chamber. As a result, the refrigerant, as shown by the solid line,
Compressor 18, outdoor heat exchanger 19, throttle resistance section 2
0, passes through the second heat exchanger 8, solenoid valve 16, first heat exchanger 7, and refrigerant heater 17 in order and returns to the compressor 18. At this time, the outdoor heat exchanger 19 acts as a condenser, and the first and second heat exchangers 7 and 8 act as evaporators. By operating the blower 9 to blow air, the air is cooled and discharged upward into the room to cool the room.

Although the blower 9 is commonly used in the above embodiment, the same effect can be obtained by providing separate blowers.

As explained above, this invention includes an outer casing, a first ventilation passage and a second ventilation passage formed in the outer casing, and a first heat exchanger provided in the first ventilation passage and functioning as an evaporator of a heat pump. an exchanger, and the second
A second heat exchanger that is installed in the ventilation path and is connected to the first heat exchanger and acts as a condenser of the heat pump, and a blower that blows air into the first ventilation path and the second ventilation path. , the air in the first ventilation passage is discharged upward in the room, the air in the second ventilation passage is discharged downward in the room, and the first heat exchanger and the second heat exchanger are connected to a throttling resistor and arranged in parallel with each other. During heating operation, the opening and closing of the solenoid valve is controlled by the detection output of a temperature detection element installed at the top of the room. The heat in the upper part of the room is effectively used to cool the upper part of the room.
Since the lower part of the room can be heated and the indoor temperature can be made uniform, it is possible to obtain an indoor unit of an air conditioner that 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, a first ventilation passage and a second ventilation passage formed in the outer casing, a first heat exchanger provided in the first ventilation passage and functioning as an evaporator of the heat pump, and the second ventilation passage. Along with being installed within the road,
A second heat exchanger that is connected to the first heat exchanger and acts as a condenser of a heat pump, and a blower that blows air to the first ventilation path and the second ventilation path, is discharged upward into the room,
The air in the second ventilation path is configured to be discharged downward into the room, and the first heat exchanger and the second heat exchanger are connected via a throttle resistor and a solenoid valve disposed in parallel thereto. An indoor unit of an air conditioner, characterized in that, during heating operation, the opening/closing of the solenoid valve is controlled by the detection output of a temperature detection element disposed in an upper part of the room.