JPH03213920A - Air-conditioner - Google Patents

Abstract

PURPOSE:To circulate conditioned air through the whole room and thereby to improve a temperature distribution sharply by a construction wherein the quantity of warm or cool air to be blown off from an upper outlet of an indoor device and a lower outlet thereof communicating with a lower space of a double floor is made adjustable by flow division in accordance with an indoor load. CONSTITUTION:Outlets 31 and 32 are provided in the upper and lower parts of an indoor device 25 having a blower 28 incorporated, respectively, while a blowoff flow dividing means 30 which can change the division ratio between the quantities of air to be blown off from these upper and lower outlets is provided in an air passage 33. The lower outlet 32 is made to communicate with a lower space of a double floor 39 and a vent hole 41 communicating with the inside of a room is provided in the end part of the space. Moreover, an inlet changeover means 37 enabling selection of a first inlet 35 opening in the front of the main body 25 of the indoor device or a second inlet 36 opening on the lower side of the main body and communicating with the lower space 40 of the double floor 39, in accordance with an operation mode, is provided. According to this constitution, cool air is blown off from the upper outlet 31, in cooling, and also sucked in from the vent hole 41 of the floor to be circulated through the room by making the changeover means 37, while whole warm air is blown off from the upper outlet 31 by the flow dividing means 30, in heating, so that the inside of the room can be warmed sufficiently.

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 created 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 the 13th factor from FIG.

FIG. 7 shows a cross-sectional side view of a conventional air-conditioning/heating device during heating. In FIG. 7, 1 is a chamber. 2 is a floor, and 2a is a floor slab. 1' is the downstairs room,
3 is this ceiling board. 4 is a space formed between the floor 2 and the ceiling plate 3. 6 is a heat pump type air conditioner installed near the outer wall of the space 4. 6 is an air supply duct of the heat pump type air conditioner 6.

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 denotes a vent hole formed at the end of the wall 8a.

Reference numeral 9 denotes an air outlet that blows warm air into the heating chamber 8 during heating. 1Q is an air outlet that blows cold air into the room 1 for cooling and heating. Reference numeral 12 denotes a communication port that communicates with the chamber 1 and 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 5 is sent to the air supply duct 6. and,
The damper 7 operates as shown in FIG. 13, and hot air is sent to the air outlet 9 and flows into the heating chamber 8. At this time,
The warm air warms the ml floor slab 2a, and the room 1 is heated by natural convection generated by the heat on the floor. After the warm air in the heating chamber passes through the vent 8b as shown by the solid arrow in FIG. 8, it 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 6 is blown directly into the room 1 from the air outlet 10 as shown in FIG. do. 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. 12, and then is returned to the air supply port 12.

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

In addition, since the room is heated by heating the floor slab with hot air and natural convection generated by the heat on the floor surface, there is a problem that heat loss to the floor is large and heating efficiency is poor.

On the other hand, during cooling, because the outlet and inlet are close to each other, a short circuit phenomenon occurs where the temperature-controlled air returns directly to the inlet without cooling the room, which reduces the efficiency of cooling and lowers the temperature. The problem was that the distribution was very poor.

In addition, it was not possible to deal with the phenomenon in which the feet of residents near windows become cold due to cold drafts (cold air convection) from windows, especially during heating.

The present invention solves the above-mentioned problems, and provides an air conditioner that can quickly bring the indoor temperature to a set temperature at the start of heating operation and improve heating efficiency.

However, the structure is capable of responding to changes in the load on the windows, prevents cold draft phenomena, and aims to provide air conditioning that keeps the feet warm while keeping the head cold and the feet warm.

Means for Solving the Problem In order to achieve this object, the air conditioner of the present invention has an upper air outlet that opens at the top of the indoor unit, and a lower air outlet that opens at the bottom and communicates with the lower space of the double floor. The volume of hot air and cold air blown from the outlet is configured such that the blowing ratio from the upper and lower air outlets can be adjusted according to the indoor load using a blowing distribution means.

In addition, the suction port is switched according to each operation mode of cooling and heating to prevent a short circuit of the blown air to the suction port especially during cooling and at the start of heating operation.

According to the above-mentioned configuration, during cooling, the present invention blows cold air upward toward the ceiling from the upper air outlet on the indoor side of the indoor unit using the blower diversion means, opens the lower air inlet, and directs the air to the front air inlet. The suction port switching means operates to close the mouth, and suction is taken from the ventilation port provided at the end of the double floor.

As a result, it is possible to circulate the entire living area without injecting heat into the suction port, and the temperature distribution can be greatly improved. Also, when heating operation starts,
The blowing/diverting means blows out all the hot air from the upper blowing outlet on the indoor side of the indoor unit to quickly warm up the room.

As a result, the hot air blown out can sufficiently heat the living area without causing a short circuit to the suction port. Then, as the room temperature approaches the set temperature, the airflow dividing means gradually shifts from the upper airflow to the lower airflow to pass hot air into the lower space of the double floor to further warm the feet.

As a result, the amount of air blown from the upper air outlet is reduced, and the discomfort caused by the wind is eliminated. In other words, it is possible to create an ideal thermal environment where the head is cold and the feet are warm, with almost no feeling of chill.

EXAMPLE Hereinafter, an example of the present invention will be explained with reference to FIGS. 1 to 6.

21 is a side wall, 22 is a floor nullab, and 23 is a ceiling. 24
is a residential area where humans live, ASHRAE, 5TA
NDARD is defined as a space with a height of 1800 WM or less and a distance of 600 fi or more from the side wall (second
(The space surrounded by the two-dot chain line in the figure).

26 is an indoor unit of the air conditioner, which is installed on the floor in one corner of the room.

The indoor unit 26 has an outer shell 26. Heat exchanger 2, blower 28
and casing29. The indoor unit 26 is equipped with a blow-off diverting means 30 having a fulcrum on the outer shell 26 and driven by an electric motor (not shown), an upper blow-off port 31 on the top surface, and a lower blow-off port 32 on the bottom surface.
They communicate through an air passage 33 on the back.

Further, a plurality of louvers 34 are provided at the upper blower outlet 31 so that the blower angle can be changed arbitrarily.

A first suction port 36 is provided at the lower front of the indoor unit 25, and a second suction port 36 is provided at the front of the lower surface.
A suction port switching means 37 is provided so that 6 can be selected. In this embodiment, the damper 37a is a rotation axis, and is driven by a timing motor (not shown) or the like.

On the other hand, a room temperature sensor 38 is installed between the suction port 36 and the heat exchanger 27 to detect the suction temperature.

39 is a double bed, 4Q is a lower space formed by the floor slab 22 and the double bed 39, and the lower air outlet 32 and suction port B36 communicate with the lower space 4o.

Reference numeral 41 denotes a ventilation opening 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 32 as possible, and
The optimal location is within 600 tm from the building and does not interfere with people's access or office equipment (such as a library).

The operation of the air conditioner configured as described above will be explained using a flowchart.

After turning on the power, set the temperature of room 1 (5et)42
At the same time, a cooling/heating mode selection 43 is performed.

First, during heating, the suction port A35 is switched by the suction port switching means 37.
is opened, and suction port B36 is closed. As a result, blower 2
6, the suction port A35 and chamber 1 communicate with each other as shown in FIG.
4o Next, the room temperature Tr is detected by the room temperature sensor 38 45
Next, the difference θ between the set temperature "set" and the detected room temperature Tr is calculated.

Here, if θ” Tset 'rr > 10 ℃ is satisfied (YES), the indoor temperature is 10 degrees lower than the set temperature.
℃ or more, the vane of the blow-off diverting means 30 rotates downward so that the top blow-off is 10% (Fig. 3), and the air path 33 to the bottom blow-off port 32 is closed at 47 degrees, that is, the living area 24 When the temperature is cold, warm air is sent directly into the living area to quickly bring it close to the set temperature Tset.

Next, when the temperature difference θ is 10≧θ>6℃, the bottom blowout is 30%.
, the blowout diverting means 3o is set to 7o% of the top blowout.
The vane rotates slightly upward and stops at position 30a in FIG. As a result, while directly heating the living area, the floor is heated, albeit slightly, and heating is also used from below.

Then, when the temperature reaches 6≧θ>2°C, the vane of the blowout diverting means 3o rotates upward again in the 49-way setting, with the lower blowout set to 70% and the upper blowout set to 3o%, and stops at the 3ob position. .

In other words, since the room temperature has become quite close to the set temperature, the rate of direct heating of the living area 24 is reduced, and the system is switched to a mainly floor heating system.

If the condition of 052°C is satisfied, all the hot air is blown out downward 60, and the hot air blown out from the lower outlet 32 passes through the lower space 40 and advances to the ventilation outlet 41 while warming the double floor 37. It blows out within 1. In other words, when the room temperature and the set temperature are close to each other, warm air is passed through the space 4o under the double floor 39 to warm the entire floor and realize radiant floor heating (solid line arrow in Figure 2).

Next, during ventilation and cooling operation, select 43 and select N.

51 degrees to close the first suction port and open the second suction port.As a result, the blower 26, the suction port B36, and the lower space 4o communicate with each other as shown in FIG.

And regarding the air outlet, the upper air outlet is unconditionally 100%44
The cool air is controlled upwardly from the upper air outlet 31 (dotted line arrow in Figure 2).

The cold air flowing upward hits the ceiling 23 and descends from there while spreading downward due to its own weight. After uniformly cooling the living area 24, the ventilation opening 4
1 (Figure 3).

According to the above embodiment, in the case of heating operation, the air is controlled to be sucked in from the first suction port 36 on the front surface of the lower part of the main body, and when the difference between the room temperature and the set temperature is large at the start of heating operation (for example, at the beginning of operation), The vane of the blow-off/distribution means 30 is driven to blow out hot air from the upper blow-off port 31 to directly heat the inside of the living area 24. On the other hand, when the difference between the room temperature and the set temperature becomes smaller, a portion of the warm air is gradually sent to the lower space 4o of the double floor 39, and the vane of the blow-off/distribution means 3o is driven so that the warm air is blown out from the ventilation port 41. let If the difference between the set temperature and the room temperature becomes smaller, all of the warm air will be transferred to the lower space 4.
Control it to send it to 0.

As a result, mild heating can be achieved through both the heating effect due to natural convection from the entire surface of the heated double floor and the heating effect due to hot air blown from the ventilation openings.

As a result, the start-up performance during heating is good, and when it approaches steady operation, it can create a living space similar to floor heating, making it possible to heat with almost no vertical temperature distribution, cold head and warm feet, and no discomfort caused by wind. .

On the other hand, during cooling, cold air is blown upward from the upper air outlet 30, hits the ceiling, and is then allowed to fall naturally under its own weight and is sucked in through the air vent 41 provided on the opposite side of the indoor unit main body 25. It is possible to send in cold air, which provides high-quality air conditioning with extremely uniform temperature distribution and no discomfort caused by the wind.

In this example, the setting standards for the ratio of the blowout branch flow are 10°C and 5°C.
, 2℃, but this value is based on the room dimensions.

It changes depending on the amount of load, etc., and is not unique.

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 has an air outlet opened at the top of an indoor unit that has a built-in blower for blowing temperature-controlled air conditioned by a heat exchanger, and a bottom air outlet opened at the bottom. An air outlet, an air path that communicates the upper outlet, the blower, and the lower outlet, and an outlet dividing means that can arbitrarily change the upper and lower outlet air volume division ratio are provided, and the opening of the lower outlet is connected to the lower space of the double floor. A ventilation port is provided at the end of the double floor that communicates with the indoor unit, and a first suction port that opens on the front surface of the indoor unit body, a second suction port that opens on the bottom surface of the indoor unit body, and a second suction port that communicates with the indoor unit. is communicated with the lower space of the double floor, and the first suction port and the second suction port are switched according to the cooling/heating operation mode.

Tip 9: During heating operation, when the difference between the room temperature and the set temperature is large (such as when starting heating operation), all of the hot air is sent to the upper outlet by the blow-off distribution means, directly heating the living area, and quickly reaching the setting. Control the temperature so that it approaches the same temperature. Meanwhile, the room temperature rises,
When the temperature approaches the set temperature, the distribution ratio between the lower air outlet and the lower air outlet is changed by the air flow dividing means, and a portion of the warm air is controlled to be sent out from the lower air outlet. As a result, the double floor is heated little by little, and the effect of heating the feet gradually appears. Then, when the room temperature in the living area becomes approximately equal to the set temperature, all of the warm air is blown downward by the blow-off distribution means, the warm air warms the double floor, and is blown out from the ventilation opening. As a result, the effect of floor heating provides an ideal heated space with almost no temperature distribution, keeping the head cool and the feet warm.

On the other hand, during cooling operation, cold air is blown upward from the top outlet, hits the ceiling, and then falls naturally due to its own weight, and is sucked in from the ventilation opening located on the opposite side of the indoor unit. It is possible to send cold air over long distances, and it is possible to achieve high-quality air conditioning that cools the head and warms the feet, with uniform temperature distribution and no discomfort caused by the wind.

[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.
Figures 3 and 4 are sectional views of essential parts of the air conditioner in each operating state, Figure 6 is a perspective view of the room in which the air conditioner is installed during steady operation during heating, and Figure 6 shows the air conditioner Figure 7 is a cross-sectional view of a conventional air conditioner during heating, Figure 8 is a plan view taken on line 4 of Figure 7, Figure 9 is a flowchart of the operation of the conditioner.
The figure is a sectional view taken along the ■-■ line in Fig. 8, Fig. 10 is a sectional view during conventional cooling, and Fig. 11 is a flat line drawing taken along the ■-v line in Fig. 10.
2 is a sectional view taken along the line MM in FIG. 11, and FIG. 13 is a partially enlarged sectional view corresponding to FIG. 8. 25... Indoor unit, 27... Heat exchanger,
28...Blower, 3o...Blowout diversion means, 31...Upper outlet, 32...Lower outlet, 33...Wind 36...1st suction port, 36...2nd suction port, 3A...
Suction port switching means, 39...Double floor, 40...
...Lower space, 41...Ventilation.

Claims (2)

[Claims] (1) An indoor unit that has a built-in blower that blows temperature-controlled air that has been conditioned by a heat exchanger has an upper air outlet that opens at the top, a lower air outlet that opens at the bottom, and an upper air outlet, a blower, and a lower air outlet. An air passage that communicates with the outlet, an outlet distribution means that can arbitrarily change the division ratio of the upper and lower outlet air volumes, and an opening of the lower outlet that communicates with the lower space of the double floor to provide ventilation at the end of the double floor. At the same time, on the windward side of the heat exchanger, a first suction port opened on the front of the indoor unit body, a second suction port opened on the bottom surface of the indoor unit, and a second suction port in the lower space of the double floor. An air conditioner characterized in that an air conditioner is provided with a suction port switching means that communicates with each other and can arbitrarily select between a first suction port and a second suction port. (2) The air conditioner according to claim 1, in which the suction port switching means is driven according to the cooling/heating operation mode.