JPH04217733A - Air conditioner - Google Patents

Abstract

PURPOSE:To perform a fast adjustment of air above a double floor (indoor area) by a method wherein an air temperature adjustment of the room having the double floor is carried out by blowing at first a large amount of air over the double floor and adjusting a rate of blowing over the double floor and blowing below the double floor. CONSTITUTION:An indoor load calculation means for use in calculating values in response to both outputs of an indoor temperature sensing means 37 and a floor temperature sensing means 40 for sensing a floor surface temperature of a double floor 38 is provided, a blowing flow dividing means 31 is controlled in response to an output of the indoor load calculation means and then a rate of air volume of air blown from an upper blowing port 32 opened at an upper part of an indoor device 25 and a lower blowing port 33 communicated with a lower spacing of the double floor 38 is controlled.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly to the control of air flow from the air conditioner.

0002

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

[0003] As a conventional technique, for example,
As shown in Japanese Patent No. 1-3337, there is an air conditioning system that utilizes the space under the floor.

[0004] Hereinafter, a conventional air conditioning system will be explained with reference to FIGS. 7 to 13.

FIG. 7 shows a side cross-sectional view of a conventional heating and cooling system during heating. In FIG. 7, 1 is a chamber. 2 is a floor, and 2a is a floor slab. 1' is the downstairs room, and 3 is its ceiling board. 4 is floor 2 and ceiling board 3
This is the space formed between the 5 is a heat pump air conditioner installed near the outer wall of the space 4. 6 is an air supply duct of the heat pump type air conditioner 5, and 7 is a damper that switches the air path depending on cooling or heating. 8
8a is a heating room formed by a floor slab 2a and a wall plate 9;
is a partition wall of the heating chamber 8, and 8b is a vent formed at the end of the partition wall 8a. Reference numeral 10 denotes an air outlet for blowing warm air into the heating chamber 8 during heating, and reference numeral 11 represents an air outlet for blowing cold air into the room 1 during cooling. 12 is an air supply port of the heat pump type air conditioner 5. 13 is a communication port that communicates with the heating chamber 8 and the space 4, and 14 is a communication port that communicates with the chamber 1 and the heating chamber 8.

[0006] The operation of the heating and cooling system constructed as described above will be explained below.

First, during heating, warm air heated by the heat pump type air conditioner 5 is sent to the air supply duct 6. Then, the damper 7 operates as shown in FIG. 13, and the hot air is sent to the air outlet 10 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 natural convection generated by the heat on the floor surface. The warm air in the heating chamber 8 passes through the vent 8b as shown by the solid arrow in FIG. 8, then flows out from the communication port 13 into the space 4 as shown in FIG.
is refluxed to.

Next, during cooling, the damper 7 closes the air outlet 10.
By blocking the air, the cold air cooled by the heat pump type air conditioner 5 is blown directly into the room 1 through the air outlet 11 to cool the room 1, as shown in FIG. The cold air that has cooled the room 1 passes through the communication ports 14 and 13 and reaches the space 4 as shown in FIG.
The air is returned to the air supply port 12.

[0009]

[Problem to be Solved by the Invention] However, the above configuration has the disadvantage that it takes time for the indoor temperature to reach the set temperature at the start of operation, especially since hot air is not blown directly into the room during heating. was. In addition, since the floor slab is heated with hot air and the room is heated by natural convection generated by the heat on the floor and radiation from the floor, it has the disadvantage of high heat loss to the floor and poor heating efficiency. Ta.

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

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks, and to provide an air conditioner that can quickly bring the indoor temperature to a set temperature at the start of heating operation and improve heating efficiency.

0012

[Means for Solving the Problems] The air conditioner of the present invention includes:
An indoor load calculation means is provided that calculates based on the outputs of both the room temperature detection means and the floor temperature detection means for detecting the floor surface temperature of the double floor,
In addition, by controlling the blow-off diversion means based on the output of the indoor load calculation means, the air flow from the upper air outlet opened at the top of the indoor unit and the lower air outlet opened at the bottom and communicating with the lower space of the double floor is controlled. This configuration allows the air volume ratio of hot air to be controlled.

[0013]

[Operation] The present invention changes the split ratio of upper air outlet and lower air outlet in accordance with the output of the indoor load calculation means which calculates based on the output of the indoor temperature detection means and the floor temperature detection means and the output of the set temperature. . That is, with the above configuration, at the start of the heating operation, a large amount of hot air is blown out from the upper outlet of the indoor unit into the living area of the room by the blow-off diversion means to quickly warm up the room.

After the heating operation starts, the indoor load is always calculated by the indoor load calculating means based on the outputs of the room temperature detecting means, the floor temperature detecting means, and the set temperature, and the blowing diversion means calculates the indoor load according to the magnitude of the indoor load. Adjust the air volume balance between the top and bottom blowouts.

That is, when there is a large difference between the room temperature, floor temperature, and the set temperature, control is performed so that the set temperature is quickly reached by blowing hot air directly into the living area of the room using the top blower. And if the difference mentioned above becomes a little smaller,
A portion of the warm air is directed to the bottom outlet and blown into the lower space of the double floor, increasing the effect of floor heating. The amount of air blown to the lower space of the double floor is determined according to this temperature difference.

[0016] If the set temperature, room temperature, and floor temperature almost match, most of the warm air is sent to the lower space of the double bed.

As a result, in the initial stage of heating operation, a large amount of warm air is blown into the living area, making it possible to quickly bring the temperature close to the set temperature. Then, when both the room temperature and the floor temperature approach the set temperature, warm air is blown into the lower space of the double floor, warming the floor itself while blowing out warm air from the ventilation holes installed at the end of the double floor. . By heating the floor, this reduces the discomfort caused by airflow, creating an ideal temperature environment for those with cold heads and warm feet, with almost no airflow sensation.

On the other hand, during cooling, the blow-off switching means blows cold air from the upper blow-off port of the indoor unit toward the ceiling, allowing the cool air to fall naturally under its own weight, thereby making the temperature distribution uniform. As a result, ideal air conditioning is achieved, with the upper part of the room being cool and the lower part being slightly warmer with colder heads and warmer feet, with less discomfort caused by the wind.

[0019]

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

21 is a side wall, 22 is a floor slab, and 23 is a ceiling. 24 is a residential area where humans live, and ASHR
For AE, STANDARD, the height is 1800mm or less,
It is also defined as a space that is 600 mm or more away 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. 2
6 is an outdoor unit.

The indoor unit 25 includes an outer shell 27, a heat exchanger 28, a blower 29, a casing 30, and a blowing/distributing means 31 having a fulcrum on the outer shell 27 and driven by an electric motor (not shown).
And, an upper air outlet 32 is provided on the upper surface and a lower air outlet 33 is provided on the lower surface,
It communicates with the indoor unit 25 through an air passage 34 at the back.

[0022] Furthermore, a plurality of louvers 35 are provided at the upper air outlet 32 so that the air outlet angle can be changed arbitrarily. A suction port 36 is installed at the lower front of the indoor unit 25, and a room temperature detection means 37 for detecting the suction temperature is installed between the suction port 36 and the heat exchanger 28.

38 is a double bed, and 39 is a lower space formed by the floor slab 22 and the double bed 38.

The lower outlet 33 communicates with the lower space 39. A bed temperature detection means 40 is installed on the floor surface near the center of the double bed 38 in thermal contact with the floor, so that the bed temperature can be detected.

Further, 41 is a ventilation hole communicating with the room at the end where the double floor 38 and the side wall 21 join, and this position is as far away from the lower air outlet 33 as possible and within 600 mm from the side wall 21. Human comings and goings and office instruments (bookshelves, etc.)
The best position is where it does not get in the way.

The operation of the air conditioner configured as described above will be explained with reference to a flowchart (FIG. 6).

After turning on the power, the room temperature is set (Tset) (step 42), and the cooling/heating mode is selected (step 43).

First, during heating operation, the room temperature detection means 37 detects the room temperature Tr (step 44), and sets the temperature setting Tse.
The difference θ1 between t and the detected room temperature Tr is calculated (step 45). Next, the bed temperature To is detected by the bed temperature detection means 40 (step 46), and the temperature setting Tset and the detected bed temperature T are
The difference θ2 from o is calculated.

Then, the temperature differences θ1 and θ2 are compared with the preset appendix of Table 1, and the temperature difference levels are classified into four levels, A, B, C, and D, from the smallest to the lowest (step 47). Based on this result, the ratio of the downward blowing air volume is determined according to the matrix in Table 1 (step 48).

[0030]

[Table 1]

The blowout dividing means 31 is driven in accordance with the value of the lower blowout air volume ratio of the matrix, and the lower blowout is from 100% to 100%.
Adjust up to 0% (step 49).

That is, when both the temperatures θ1 and θ2 are large, the bottom blowing ratio of the hot air is 0%, and all of the warm air is blown out from the upper air outlet 32, and the living area is quickly warmed without being blown into the lower space 39. At this time, the position of the blow-off flow dividing means 31 of the upper and lower flow dividing device is 31a (FIG. 4). Then, as the room temperature rises and the value of θ1 decreases, the lower space 3 gradually decreases.
Start blowing air to 9. Then, when the room temperature becomes almost stable and approaches the set temperature, the lower air blowing ratio is increased to 40% and 60%.
The energy is then used to heat the floor itself. At this time, the position of the blow-off flow dividing means 31 of the upper and lower flow dividing device is near 31b. And θ1 and θ2 are

[0033]

[Outside 1]

[0034] At this time, the position of the blow-off flow dividing means 31 of the upper and lower flow dividing device is 31c.

On the other hand, during cooling operation, the top blowout is unconditionally 100.
%, and blows cold air upward from the upper air outlet 32 (dashed 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. And living area 24
After being cooled, it is sucked into the suction port 36.

According to the above embodiment, especially during heating operation, when the difference between the room temperature TR and the temperature setting Tset is large and the bed temperature To is also low (for example, at the beginning of the operation), the blow-off diverting means 31
The vanes are controlled so that all of the hot air is blown out from the upper outlet 32, and the living area 24 is directly heated.

On the other hand, the difference between the room temperature and the set temperature becomes smaller,
Further, as the bed temperature rises, it becomes possible to raise the bed temperature by increasing the ratio of bottom blowing to 20%, 40%, 60%, and 100% according to the level.

As a result, mild heating is possible due to 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.

[0039] As a result, the start-up performance during heating is good,
Furthermore, if the system is brought to a steady state of operation, the living space can be made similar to underfloor heating, making it possible to heat the room with almost no temperature distribution, with cold heads and warm feet, and without the discomfort caused by wind.

[0040] Furthermore, during cooling, the cold air is blown upward from the upper outlet 32, hits the ceiling, and is then allowed to fall naturally under its own weight, resulting in a very uniform temperature distribution without any discomfort caused by the wind. , high-quality air conditioning can be achieved.

[0041] In this example, the setting standard for the diversion ratio is 3°C.
, 5°C, and 10°C, but these values vary depending on room dimensions, specifications, etc., and are not unambiguous.

[0042] Also, the diversion ratio is 0%, 20%, 40%, 6
Although it is set to 0% and 100%, the setting is arbitrary.

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.

[0044]

[Effects of the invention] An indoor unit that has a built-in blower that blows temperature-conditioned 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 and the air blower. An air passage that communicates with the lower outlet and an outlet distribution means that can arbitrarily change the upper and lower outlet air volume distribution ratio are provided, and the opening of the lower outlet is communicated with the lower space of the double floor, and the end of the double floor is connected to the lower outlet. A ventilation hole communicating with the room is provided in the part, and a room temperature detection means,
By providing an indoor load calculating means that calculates based on the output from the bed temperature detecting means that detects the surface temperature of the double floor and the output of the set temperature, and controlling the blow-off diversion means based on this output, heating can be performed. When there is a large difference between the room temperature or floor temperature during operation and the set temperature (such as when starting heating operation), all of the warm air is blown from the upper outlet, directly warming the living area and quickly approaching the set temperature. Control. On the other hand, if the room temperature rises and the floor surface temperature gradually rises, the ratio of bottom blowing is increased to, for example, 20%, 40%, and 60%, and as the temperature approaches the set temperature, it becomes 100% bottom blowing.

As a result, the effect of floor heating provides an ideal heated space with almost no unevenness in temperature distribution, and which keeps the head cold and the feet warm.

[0046] Not only the room temperature in the living area but also the floor temperature is monitored and the bottom blowout diversion ratio is determined, so the temperature of the entire floor can be raised without heating only the room, creating a more uniform temperature space. Become.

[0047] Furthermore, during cooling operation, the air outlet switching means blows out cold air from the upper air outlet on the indoor side toward the ceiling and lowers it due to the difference in specific gravity, making it possible to cool the head and warm the feet without feeling any airflow. The practical effects are significant.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of essential parts of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a sectional view of a room in which the air conditioner of the present invention is installed.

FIG. 3 is a sectional view of a main part of the air conditioner of the present invention in various operating states.

FIG. 4 is a sectional view of a main part of the air conditioner of the present invention in various operating states.

FIG. 5 is a perspective view of a room in which the air conditioner of the present invention is installed during steady operation during heating.

FIG. 6 is a flowchart of the operation of the air conditioner of the present invention.

FIG. 7 is a side sectional view of a conventional air conditioner during heating.

8 is a sectional view taken along the line II-II in FIG. 7. FIG.

9 is a sectional view taken along the line III-III in FIG. 8. FIG.

FIG. 10 is a side sectional view of a conventional air conditioner during cooling.

11 is a sectional view taken along the line V-V in FIG. 10. FIG.

FIG. 12 is a sectional view taken along the line VI-VI in FIG. 11;

FIG. 13 is a partially enlarged sectional view of FIG. 8;

[Explanation of symbols]

21... Side wall, 22... Floor slab, 23... Ceiling,
24...Living area, 25...Indoor unit, 26...Outdoor unit, 27...Outer shell, 28...Heat exchanger, 29...Blower, 30...Casing, 31...Blowout diversion means, 32...Upper outlet, 33...Downward blower Exit, 34
...Air path, 35...Louver, 36...Blow inlet, 37...
Room temperature detection means, 38...Double floor, 39...Lower space, 40...Bed temperature detection means, 41...Ventilation opening.

Claims (1)

[Claims] Claim 1: An indoor unit that includes a built-in blower that blows temperature-controlled air that has been conditioned by a heat exchanger; an upper air outlet that opens at the top, a lower air outlet that opens at the bottom; and the upper air outlet and the air blower. and a lower air outlet, and an air outlet dividing means capable of arbitrarily changing the dividing ratio of the upper and lower blowing air volumes, and the opening of the lower air outlet is communicated with the lower space of the double floor. A ventilation hole communicating with the room is provided at the end of the double floor, and the indoor load is calculated based on the output from the room temperature detection means, the floor temperature detection means that detects the surface temperature of the double floor, and the output of the set temperature. An air conditioner comprising a calculation means, and controlling the blow-off diversion means based on the output of the indoor load calculation means.