JPH02251025A - Air conditioner - Google Patents

Abstract

PURPOSE:To enable the rapid increase of temperature in a room to a set value during the starting of heating operation by providing a hot air recirculating means to return within an indoor machine a part of air after heat exchange to the upper stream side of a heat exchanger again during the starting of heating operation, a ventilating port formed in the end part of a double floor and communicating to the interior of a room, and a communicating hole communicating in an arbitrary position to the interior of a room. CONSTITUTION:During the starting of heating operation, a part of air after heat exchange is returned to a heat exchanger 27 again by a hot air recirculating means 32 to perform heat exchange. An air temperature is increased to a higher value, and high temperature air is discharged through a ventilating port 39 in the end part of a double floor 37 and a communication hole 40 in an arbitrary place to rapidly warm the interior of a room. When an indoor temperature is increased to a set value, the hot air recirculating means 32 is rendered inoperative, all air heat-exchanged once is discharged through the ventilating port 39 in the end part of the double floor 37 and the communication hole 40 in an arbitrary place to perform breeze discharge heating from a floor. This constitution enables rapid provision of ideal warm environment being freed from an uncomfortable feeling and of a type in which a head is kept cool and feet warm.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an air conditioner, and particularly to control of the air blowing from the air conditioner.

BACKGROUND OF THE INVENTION In recent years, importance has been placed on the comfort of the indoor environment provided by air conditioners.

As a conventional technique, there is an air-conditioning/heating system that utilizes an underfloor space, as disclosed in, for example, Japanese Utility Model Application Publication No. 61-3337.

Hereinafter, a conventional air-conditioning device will be explained with reference to FIGS. 5 to 11.

FIG. 5 shows a cross-sectional side view of a conventional heating and cooling device during heating. In FIG. 6, 1 is a chamber. 2 is a floor, and 2a is a floor slab. 1' is in the downstairs room,
3 is this ceiling board. 4 is a space formed between the floor 2 and the ceiling plate 3. 5 is a heat pump air conditioner installed near the outer wall of the space 4. Reference numeral 6 denotes an air supply duct of the human pump type air conditioner 5. 7
is a damper that switches the air path depending on cooling or heating.

8 is a heating chamber formed by the floor slab 2a and the wall plate 11. 8a is a partition wall of the heating chamber 8. Reference numeral 8b represents a vent hole formed at the end of the partition wall 8a. Reference numeral 9 denotes an air outlet that blows warm air into the heating chamber 8 during heating. Reference numeral 10 denotes an air outlet that blows cold air into the chamber 1 during cooling. 12 is an air supply port of the human pump type air conditioner 5. 13 is a communication port that communicates with the heating chamber 8 and the space 4. 14 is the chamber 1
and a communication port communicating with the heating chamber 8.

The operation of the heating and cooling device configured as described above will be described below.

First, during heating, warm air warmed by the heat pump type air conditioner 6 is sent to the air supply duct 6. and,
The damper 7 operates as shown in FIG. 11, and hot air is sent to the air outlet 9 and flows into the heating chamber 8. At this time,
The floor slab 2a is heated by the warm air, and the room 1 is heated by radiant heat from the floor surface. The warm air in the heating chamber passes through the ventilation port 8b as shown by the solid arrow in FIG. 6, and then flows out from the communication port 13 into the space 4 as shown in FIG. It is refluxed to the air port 12.

Next, during cooling, the damper 7 blocks the air outlet 9, so that the cold air cooled by the heat pump air conditioner 5 is blown directly into the room 1 through the air outlet 10 as shown in FIG. Cool down.

The cold air that has cooled the chamber 1 passes through the communication port 14.13 and reaches the space 4, as shown in FIG. 10, and then is returned to the air supply port 12.

Problems to be Solved by the Invention However, with the above configuration, hot air is not blown directly into the room during heating, so there is a problem that it takes time for the room to reach the set temperature at the start of operation. .

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an air conditioner that can quickly bring the indoor temperature to a set temperature at the start of heating operation.

This air conditioner has an indoor unit with a lower air outlet that opens into the lower space of the double floor and an upper air outlet that opens into the room. , an air outlet switching means that switches these air outlets according to the heating/cooling operation mode, and a part of the air after heat exchange at the start of heating operation within the indoor unit and also on the upstream side of the heat exchanger. 7. The double bed is provided with a hot air recirculation means, a ventilation hole that communicates with the indoor room at an end, and a communication hole that communicates with the indoor room at an arbitrary position.

Effects of the present invention With the above-described configuration, at the start of heating operation, a part of the air after heat exchange is returned to the upstream side of the heat exchanger by the hot air recirculation means for heat exchange, and the air temperature is increased. By raising the temperature even higher, high-temperature air is blown out from the ventilation holes at the ends of the double floor and communication holes at arbitrary locations to quickly warm up the room. Then, when the indoor temperature reaches the set temperature, the hot air recirculation means is released and -
All of the air that has been exchanged with coal heat is blown out through the ventilation holes at the ends of the double floor and through the communication holes at any location, creating a gentle breeze blowing heating from the floor, creating an ideal thermal environment that keeps your head cold and your feet warm without the discomfort caused by the wind. Make it quickly.

In addition, during cooling, the air outlet switching means blows cold air upward from the upper air outlet on the indoor side of the indoor unit, and sucks it in from the ventilation hole at the end of the double floor and the communication hole at any location, so there is no discomfort caused by the wind. Achieve air conditioning that keeps your head cold and your feet warm.

Embodiment 6'\ Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 11 to 4.

21 is a side wall, 22 is a floor slab, and 23 is a ceiling. 24
is a residential area where humans live, and is 85HRAE.

5TANDARD is defined as a space with a height of 1800πm or less and a distance of 6oomm or more from the side wall (the space surrounded by the two-dot chain line in Fig. 2). 25 is an indoor unit of an air conditioner, which is installed on the floor in one corner of the room. The indoor unit 25 has an outer shell 26, a heat exchanger 2γ, an air blower 28 which is an air outlet switching means and can be rotated in forward and reverse directions, and a casing 29. 30 is an upper air outlet provided at the upper part of the indoor unit 25. Reference numeral 31 indicates a lower air outlet provided at the lower part of the indoor unit 25. Reference numeral 32 indicates a hot air recirculation means p, which is comprised of a recirculation air passage 33, a damper 34, and a recirculation blower 35. The recirculation air passage 33 has an opening 33a on the downstream side of the blower 28, and an opening 33a on the upstream side of the heat exchanger 2Y.
It has b. The damper 34 has a J opening 33a.
It has a fulcrum on the FiiJ outer shell 26 and can be driven. The recirculation river feeder 7 and the wind blower 35 are installed in the opening 33b. A temperature sensor 36 detects the indoor temperature, and is installed in front of the indoor unit 25. 37 is a double floor. 38 is a lower space of the double floor, and the lower outlet 31 is open. Reference numeral 39 denotes a ventilation hole that communicates with the room at the end where the double floor 37 and the side wall 21 join, and this position is as far away from the lower air outlet 31 as possible, and the side wall 2
The optimal location is within 1 to 6 o'clock and does not interfere with people's access or office equipment (such as a library). Reference numeral 40 denotes a small diameter communication hole that communicates with the interior of the room at an arbitrary location on the double floor 37.

The operation of the air conditioner configured as above will be described below.

First, at the start of heating operation, the damper 34 is driven to open the opening 33a, as shown in FIG. Then, as the recirculation blower 36 rotates, a part of the air heat exchanged in the heat exchanger 27 is sucked in from the opening 33a, passes through the recirculation air path 33, and then exits from the opening 33b. The heat exchanger 2
7, heat is exchanged. After the air that has become high temperature due to this repetition is blown out from the lower air outlet 31, it is then blown out from the lower air outlet 31.
8 and blows out from the ventilation port 39 and the communication hole to bring the living area 24 closer to the set temperature quickly. and,
When the temperature detected by the temperature sensor 36 reaches the set temperature, the damper 34 is driven to close the opening 33a, and as shown by the solid line in FIGS. After blowing out from the communication hole 39 and the communication hole 40 to warm the living area 24, the air is sucked in from the upper air outlet SO (also used for suction during heating). Incidentally, since the communication hole 40 has a minute diameter, the speed of the hot air blown out from it is as small as 0.1 m/s or less, so that humans do not feel uncomfortable due to the airflow.

Next, during cooling operation, the blower 28 is set to rotate in the opposite direction to that during heating operation, so that the air flows upward, as shown by the dotted lines in FIGS. 1 and 2, and the heat exchange Vessel 27
After passing through and being cooled, the air is blown upward from the upper air outlet 30. Then, the cold air flowing upward collides with the ceiling 23 and descends from there while spreading downward due to its own weight.

After cooling the living area 24, the ventilation opening 3
9 and the communication hole 4o, passes through the lower space 38 of the double floor 37, and is sucked in from the lower air outlet 31 (also used for suction during cooling).

According to the above embodiment, at the start of heating operation, the damper 34 is driven to open the opening 33a, and the recirculation blower 35 is rotated to repeatedly exchange heat with a portion of the warm air. High-temperature air is blown out from the ventilation port 39 and the communication hole 40 to quickly reach the set temperature in the living area 24. Further, since warm air is blown out from the ventilation holes 39 and the communication holes 40 to warm the living area from the entire surface of the floor, a uniform temperature distribution can be obtained.

During cooling operation, cold air is blown upward from the upper outlet 30, hits the ceiling, and then falls naturally under its own weight, so a very uniform temperature distribution without any discomfort caused by the wind is obtained, and high-quality air is produced. Air conditioning can be achieved.

10 (Note that in this embodiment, the upper and lower air outlet switching means is handled by switching between forward and reverse rotation of the fan, but the υ air outlet may be switched using a switching damper or the like.

Further, in this embodiment, the lower outlet is used as the suction port during cooling and the upper outlet is used as the suction port during heating, but it goes without saying that a dedicated suction port may be provided separately.

Further, in this embodiment, the lower space is formed by a double floor, but it goes without saying that the same effect can be obtained even if the lower space is provided under the floor.

Effects of the Invention As is clear from the above embodiments, the present invention provides an indoor unit equipped with a built-in blower for blowing temperature-controlled air that has been conditioned by a heat exchanger. Air outlet and
An upper air outlet opening into the room; an air outlet switching means for switching these air outlets according to the heating/cooling operation mode; Heating operation can be started by providing hot air recirculation means to return the hot air to the upstream side of the exchanger, a ventilation hole that communicates with the interior at the end of the double floor, and a communication hole that communicates with the interior at an arbitrary position. Sometimes, using hot air recirculation means, a portion of the air after heat exchange is repeatedly heat-exchanged within the indoor unit, blowing out high-temperature air from the ventilation holes and communication holes provided in the double floor, and quickly distributing the air to the living area. It is possible to heat the In addition, by blowing warm air out of the ventilation holes and communication holes, heating is performed with a gentle breeze blown from the entire floor, making it possible to obtain a uniform indoor temperature distribution with cold heads and warm feet.

During cooling operation, the air outlet switching means blows cold air from the upper air outlet on the indoor side toward the ceiling, and the cold air that falls due to the difference in specific gravity is sucked in through the ventilation holes and communication holes provided in the double floor, creating a uniform air flow. It is possible to obtain indoor temperature distribution.

[Brief explanation of drawings]

FIG. 1 is a sectional view of essential parts of an air conditioner according to an embodiment of the present invention, and FIG. 2 is a sectional view of a room in which the air conditioner is installed.
Figure 3 is a cross-sectional view of the main parts of the air conditioner when heating operation starts, Figure 4 is a perspective view of the air conditioner installed, and Figure 5 is a perspective view of the air conditioner installed.
Figure 6 is a cross-sectional view of the conventional heating mode, Figure 6 is a plan view of the flat part taken along the line ■-■ in Figure 5, Figure 7 is a cross-sectional view of the line shown in Figure 6, and Figure 8 is a cross-sectional view of the conventional cooling mode. , FIG. 9 is a plan view of the V-V section in FIG. 8,
10 is a sectional view taken along the line ■--■ in FIG. 9, and FIG. 11 is an enlarged sectional view of a portion corresponding to FIG. 6. 25 Indoor unit, 27 Heat exchanger, 28 Air outlet switching means (blower), 30 Upper air outlet, 31
...Lower outlet, 32... Warm air recirculation means, 33
... Recirculation air path, 34 ... Damper, 35
...Recirculation blower, 37...Double floor, 38
・ -Lower space, 39... Ventilation opening, 40...
・Communication hole. Name of agent: Patent attorney Shigetaka Awano and one other person η-
Mofugi ℃ Kneeling and blasphemous area

Claims (1)

[Claims] An indoor unit that has a built-in blower that blows temperature-controlled air that has been conditioned by a heat exchanger has a lower outlet that opens into the lower space of the double floor, an upper outlet that opens into the room, and these outlets. an air outlet switching means for switching according to the heating/cooling operation mode; a hot air recirculation means for returning a part of the air after heat exchange within the indoor unit to the upstream side of the heat exchanger at the start of the heating operation; A ventilation hole that communicates with the room at the end of the double floor,
An air conditioner characterized by having a communication hole communicating with a room at an arbitrary position.