JPH05106903A - Air conditioner - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an air conditioner capable of quickly and reliably equalizing the temperature of the entire room. [Configuration] Left and right louvers 63 for changing the wind direction are provided at the air outlet 3 of the indoor unit 1. A temperature sensor unit 10 is provided in the indoor unit 1. The temperature sensor unit 10 includes a temperature sensor 19 a and a temperature sensor 1 that detect the temperature of heat radiated from predetermined locations in the left-right direction toward the indoor unit 1.
9b. The detected temperatures Tr ₁ and Tr _{2 of the} temperature sensors 19a and 19b are taken in, and the difference ΔT between the detected temperatures ΔT
r (= Tr ₁ −Tr ₂ ) is obtained. And this Δ
The center position and angle of the swing of the left and right louvers 63 are set according to Tr.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner having left and right louvers at its outlet.

[0002]

2. Description of the Related Art Conventionally, there is a left / right louver that changes the direction of blown air by a swing, and the center position of the swing of the left / right louvers is changed according to the temperature difference at a plurality of locations in a room.

In this case, the directions of the left and right louvers are switched to, for example, three positions of left position, center position and right position, and
The temperature at the left and right of the indoor unit is detected. Then, when heating, the wind (warm air) is sent in the lower temperature direction, and when cooling, the wind (cool air) is sent in the higher temperature direction.
Is sent to alleviate the bias in the temperature distribution inside the room and keep the temperature inside the room uniform.

[0004]

However, in the above air conditioner, when the left and right louvers are set to the left direction, for example, during heating, the temperature at the left position is unnecessarily higher than the temperature at the right position. May rise. When this happens, the orientation of the left and right louvers changes to the right, and this time the temperature at the right position becomes higher than the temperature at the left position.

In this way, a hunting phenomenon occurs in which the directions of the left and right louvers reciprocate left and right, which causes a situation in which the temperature distribution in the entire room cannot be made uniform. Further, it takes a long time to make the temperature distribution uniform.

The present invention takes the above circumstances into consideration,
It is an object of the invention to provide an air conditioner that can quickly and surely make the temperature of the entire room uniform.

[0007]

An air conditioner according to the present invention includes left and right louvers that change the direction of blown air by a swing, a means for detecting the temperature at a plurality of locations in a room, and a difference between the detected temperatures. A means for setting the center position of the swing of the left and right louvers, and a means for setting the swing angle of the left and right louvers according to the difference between the detected temperatures are provided.

[0008]

In the air conditioner of the present invention, the temperatures at a plurality of locations inside the room are detected, and the center position of the swing of the left and right louvers is set according to the difference between the detected temperatures. Further, the swing angle of the left and right louvers is set according to the difference between the detected temperatures.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

2 and 3, reference numeral 1 denotes an indoor unit, which is installed on the wall surface in the room. This indoor unit 1 has a suction port 2 on the front surface and an air outlet 3 on the lower part of the front surface,
Further, a radiant heat detector 4 is provided next to the outlet 3. The radiant heat detection unit 4 is for taking in heat energy radiated from the floor or wall of the room, and has the temperature sensor unit 10 built therein.

The temperature sensor unit 10 has a visual field range to the left and a visual field to the right toward the indoor unit 1, and detects radiant heat temperatures at a plurality of locations in the room R. The view range is seen from above in FIG. 4, and the side view is shown in FIG.

The structure of the temperature sensor unit 10 will be described with reference to FIGS. 6 to 9. 6 is a cross-sectional plan view of the temperature sensor unit 10, FIG. 7 is a front view, FIG. 8 is a vertical sectional view, and FIG. 9 is an exploded perspective view. Reference numeral 11 denotes a first casing made of a heat insulating material, which has a rectangular opening 11a on the front surface and a circuit mounting portion 11b on the back surface.

A soaking casing 12 made of aluminum is fitted so as to be in contact with the inner peripheral surface of the casing 11, and a heat insulating material 13 made of styrene foam is filled inside the soaking casing 12.

A surface of the heat insulating material 13 corresponding to the opening 11a is formed in a concave shape, and the heat uniform casing 14 made of aluminum is formed therein.
Is fitted. A pair of reflecting mirrors 15a and 15b are arranged side by side inside the heat equalizing casing 14 side by side.

The reflecting mirrors 15a and 15b are, for example, parabolic mirrors having the same curvature, and are obtained by surface-plating a metal thin plate press-molded product or a resin molded product. The axes 16a and 16b have the same angle with respect to the center position,
Different directivities are provided in the left and right directions so as to intersect each other at one point on the central axis 17 that is inclined inwardly and extends from the connecting position of the reflecting mirrors 15a and 15b.

Therefore, the visual field range as the reflecting mirrors 15a and 15b intersects greatly in front of the opening 11a,
The edge line along these mutual connecting portions becomes a virtual thermal boundary line, and the reflecting mirrors 15a and 15b themselves are in a thermally separated state.

From the side of the opening 11a, the reflecting mirrors 15a, 15
A frame-shaped heat receiving plate 18 is provided so as to press b. The heat receiving plate 18 has a pair of band-shaped sensor mounting portions 18 inside.
a, 18b, and the sensor mounting portion 18a,
Radiant heat temperature sensors 19a and 19b are bonded and fixed to 18b by using a heat conductive adhesive such as an epoxy adhesive. The radiant heat temperature sensors 19a and 19b are mounted on the shaft centers 16a and 16b, respectively.
The focal points are 5a and 15b, respectively.

Disc-shaped heat insulating materials 20a and 20b are attached to the lower surfaces of the sensor mounting portions 18a and 18b, respectively. The heat insulating materials 20a, 20b are so-called heat insulating materials with aluminum foil, which have aluminum foils 21a, 21b attached to the surfaces corresponding to the openings 11a.

The heat receiving plate 18 includes sensor mounting portions 18a and 1a.
A claw-shaped sensor mounting portion 18c is provided at an intermediate position of 8b, and the reference temperature sensor 22 is bonded and fixed to the upper surface of the sensor mounting portion 18c using an epoxy adhesive as in the above. The mounting position of the reference temperature sensor 22 is on the central axis 17, which is the thermal boundary line. Then, the aluminum foil tape 23 is wound so as to surround the reference temperature sensor 22 and the sensor mounting portion 18c. Temperature sensors 19a, 19
Both b and 22 are negative characteristic thermistors (may be positive characteristic thermistors), and those having the same specifications are adopted.

Further, an infrared transmitting film 25, which is a filter, is provided on the lower surface side of the heat receiving plate 18 with a frame-shaped and elastic spacer 24 interposed therebetween, and the infrared transmitting film 25 is held by a filter frame 26. This filter frame 26 is
The peripheral portion has a plurality of fixing claws 26a, and these fixing claws 26a are fixed grooves (not shown) of the casing 11.
It is fixed by being fitted into. The fixation is strengthened by the cushion reaction force of the spacer 24.

The infrared transparent film 25 has a thickness of 100, for example.
The casing 11 is a polyethylene sheet of about μm.
Infrared rays are mainly transmitted to the inside, and the influence of the blown airflow of the outside world is affected by the heat receiving plate 18 and the temperature sensors 19a, 19b, 22.
It acts to prevent such a situation.

The filter frame 26 comprises a pair of rod holding members 26.
b and 26b, both ends of the SUS rod 27 are inserted and held therein. The SUS rod 27 is a filter frame 26.
Across the central portion of the above, it functions to protect the infrared transmitting film 25 from external contact. Here, the operation of the temperature sensor unit 10 will be described. When heat is radiated from the wall surface or the floor surface, the radiant heat energy becomes infrared light and is projected on the temperature sensor unit 10.

That is, as shown in FIGS. 4 and 5, radiant heat energy is radiated to the temperature sensor unit 10 in the indoor unit 1 from the field-of-view range of the room R to be conditioned on the floor and wall surface which are lined up in the left and right directions. Is projected.

This radiant heat energy becomes infrared light, enters the opening 11a, passes through the infrared transmitting film 25, and is reflected by the reflecting mirror 1.
5a and 15b are projected, and are reflected there while being focused on the focal position. The radiant heat energy reflected by the reflecting mirrors 15a, 15b is concentrated and taken in by the sensor mounting portions 18a, 18b and transmitted to the temperature sensors 19a, 19b. The ambient temperature is also applied to the temperature sensors 19a and 19b, and the ambient temperature is detected by the reference temperature sensor 22.

On the other hand, the second casing 31 is detachably mounted on the circuit mounting portion 11b on the back surface of the casing 11. A sensor circuit 32 is housed and held in the casing 31.

The sensor circuit 32 is connected to the temperature sensors 19a, 19b, 22 inside the casing 11 by a lead wire 33, and detects the temperature in the left-right direction of the room with each sensor as a constituent element. The output side of the sensor circuit 32 is connected to a control unit 70 described later via a lead wire 34 and a connector 35.

Further, the left and right temperature sensors 19a and 19a
The lead wire (not shown) of b is wired along the sensor mounting portions 18a and 18b, and is connected to the lead wire 33 of the sensor circuit 32. Here, a specific configuration of the sensor circuit 32 is shown in FIG.

A terminal plate 40 has a power supply terminal 40a, an output terminal 40b, an output terminal 40c, and a grounding terminal (GND) 40g. Terminal 40 of these
A DC voltage of 5 V for operation is applied between a and 40 g.

A capacitor 41 is connected between the terminals 40a and 40g. A series circuit of a resistor 43 and a radiant heat temperature sensor 19a is connected to the capacitor 41 via a semi-fixed resistor 42. Semi-fixed resistor 4 in the capacitor 41
A resistor 44 and a radiant heat temperature sensor 19b are connected in series via the resistor 2. In addition, the capacitor 41, the resistor 45
And a series circuit of the reference temperature sensor 22 are connected.

The voltage Va generated in the temperature sensor 19a and the voltage (reference voltage) Vc generated in the temperature sensor 22 are input to the differential amplifier circuit 46. The differential amplifier circuit 46 includes an operational amplifier 47, an input resistance R ₁ and a feedback resistance R ₂ .
And outputs the voltage V _R of the level corresponding to the difference between the voltage Va and Vc inputted. The output voltage V _R is represented by the following formula. _{V R = Va- (Vc-Va} ) R 2 / R 1

That is, the voltage V _R accurately corresponds to the radiant heat temperature in the visual field range to the right toward the indoor unit 1 without the influence of the surrounding heat. This voltage V _R is once applied to the capacitor 51 and is externally output through the terminals 40b and 40g.

The voltage Vb generated in the temperature sensor 19b and the voltage (reference voltage) Vc generated in the temperature sensor 22 are input to the differential amplifier circuit 48. The differential amplifier circuit 48 includes an operational amplifier 49, an input resistor R ₁ and a feedback resistor R ₂ .
The voltage _VL having a level corresponding to the difference between the input voltages Vb and Vc is output. This output voltage V _L is expressed by the following equation. _{V L = Vb- (Vc-Vb} ) R 2 / R 1

That is, the voltage V _L , which is free from the influence of ambient heat, accurately corresponds to the radiant heat temperature in the visual field range to the left toward the indoor unit 1. This voltage V _L is once applied to the capacitor 52 and externally output through the terminals 40c and 40g.

The semi-fixed resistor 42 is for adjusting the zero point in order to remove the "variation" of the circuit constant, and the resistance value of the resistor 43 is r ₁ , the resistance value of the resistor 44 is r ₂ (= r ₁ ), and the resistance is Assuming that the resistance value of 45 is r ₃ , the resistance value r ₀ of the semi-fixed resistor 42 is adjusted so that the following expression is satisfied. r ₃ = (r 1 + r 2 + r ₀ ) / 2

The temperature sensor unit 10 having such a configuration
According to the inside of the casing 11 and the reflector 15a,
Since the uniform heat casings 12 and 14 are provided on the back side of 15b, an extra heat effect in the indoor unit 1 is caused by the temperature sensor unit 10.
It can be prevented from spreading to the inside.

The temperature sensors 19a and 19b are arranged in the air together with the sensor mounting portions 18a and 18b.
In addition, since the space is closed by the infrared ray transmissive film 25, the extra heat effect penetrating through the infrared ray transmissive film 25 acts equally on the temperature sensors 19a and 19b. The infrared ray permeable film 25 prevents “dust” and “dust” from entering the casing 11.

Since the aluminum foil heat insulating materials 20a and 20b having high reflectance are present on the lower surfaces of the sensor mounting portions 18a and 18b, the infrared ray transmitting film 25 to the temperature sensors 19a and 19b.
The influence of the secondary radiation on can be blocked.

Reference temperature sensor 22 and sensor mounting portion 18
Since both c are surrounded by the aluminum foil tape 23, the influence of the secondary radiation from the infrared transmitting film 25 to the reference temperature sensor 22 can be blocked. from these things,
It is possible to accurately detect the radiant heat temperature in the left and right directions.

Further, since the SUS rod 27 is present in front of the infrared transparent film 25, it is possible to prevent the situation where a tool or finger touches the infrared transparent film 25 during the manufacturing process or maintenance service, and the infrared transparent film 25 is not damaged. To be prevented.

On the other hand, as shown in FIG. 11, the inside of the indoor unit 1 is located at a position corresponding to the suction port 2 and the indoor heat exchanger 6 is provided.
1, there is a ventilation passage formed by the heat insulating material 62 from the indoor heat exchanger 61 to the outlet 3. In the ventilation passage, the indoor fan 63, the left and right louvers 64, and the upper and lower louvers 65 are sequentially provided from the indoor heat exchanger 61 side to the outlet 3.

The left and right louvers 64 are, as shown in FIG.
A large number of blades are connected by a rod body 64a at a predetermined interval, and one end of each blade is swung in the left and right direction by the operation of a motor 64M. The swing allows the air blown into the room to be swung in the left and right directions. ..

The upper and lower louvers 65, as shown in FIG.
The blades are swung in the vertical direction by the operation of the motor 65M, and the air blown into the room can be swung up and down by the swing. In addition, the indoor unit 1 is shown in FIG.
The control circuit shown in 2 is mounted. 70 is a control unit,
It consists of a microcomputer and its peripheral circuits, and controls the air conditioner in general.
The control circuit 70 includes a sensor circuit 32 and a fan drive circuit 7.
1, the left and right louver drive circuits 72, and the upper and lower louver drive circuits 73 are connected. The fan drive circuit 71 includes a controller 7
The indoor fan motor 63M is driven at a speed according to the command of 0.

The left and right louver drive circuit 72 drives the motor 64M of the left and right louvers 64 in response to a command from the control unit 70, and changes the center position of the swing of the left and right louvers 64 in the left and right directions. It functions to swing 64 over a predetermined angle. The upper and lower louver drive circuit 73 drives the motor 65M of the upper and lower louvers 65 in response to a command from the control unit 70.

Reference numeral 80 denotes a remote control type operation device (hereinafter, abbreviated as a remote controller) for transmitting data of various operating conditions to the control unit 70 by infrared light. The control unit 70 has the following functional means.

(1) The temperature Tr ₁ at the right position toward the indoor unit ₁ is captured from the output voltage V _{R of the} sensor circuit 32, and the temperature Tr ₁ toward the indoor unit 1 is moved to the left from the output voltage V _L of the sensor circuit 32. Means for capturing the temperature Tr ₂ at the position. (2) Difference ΔTr (= Tr ₁ −Tr ₂ ) between both captured temperatures
Means to detect. (3) A means for setting the center position of the swing of the left and right louvers 64 based on the temperature difference ΔTr and the conditions of the following Table 1 stored in the internal memory in advance. (4) A means for setting the swing angle of the left and right louvers 64 according to the temperature difference ΔTr and the conditions of the following Table 1 stored in advance in the internal memory.

[0046]

[Table 1] Next, how the wind direction control based on the temperature detection of the sensor circuit 32 will be described with reference to FIGS. 1 and 13.

When the operation (for example, the heating operation) is started, the sensor circuit 32 operates to detect the temperature Tr _{1 at} the rightward position and the temperature Tr _{2 at the} leftward position toward the indoor unit 1. It

Difference between the temperatures Tr ₁ and Tr ₂ ΔTr (= Tr ₁
-Tr ₂ ) is detected, and the center position and angle of the swing of the left and right louvers 64 are set based on the temperature difference ΔTr and the conditions in Table 1 above.

That is, the temperature Tr _{1 at the} rightward position is lower than the temperature Tr _{2 at the} leftward position, and the difference is 2 ° C.
If it is larger than that (ΔTr ≦ −2), the center position of the swing of the left and right louvers 64 is set to the C position shown in FIG. Then, the swing angle is set to a large value of 60 °.

In this way, the warm air is sent over a wide range in the rightward position on the low temperature side, and the uneven temperature distribution in the room is alleviated. This state continues for a fixed time Ts based on the time count t. After the elapse of the certain time Ts, the difference ΔTr between the temperatures Tr ₁ and Tr ₂ is detected again, and the center position and the angle of the swing of the left and right louvers 64 are set respectively.

For example, when the temperature Tr _{1 at the} rightward position is lower than the temperature Tr _{2 at the} leftward position, but the difference is small (-2 <ΔTr <-1), the center position of the swing of the left and right louvers 64. The angle is narrowed to 45 ° while keeping the rightward position. As a result, the warm air is sent over a range where the rightward position on the low temperature side is not so wide.

When the temperature Tr ₁ at the rightward position and the temperature Tr _{2 at the} leftward position do not change much (-1 <ΔTr <+
1), the center position of the swing of the left and right louvers 64 is set to the B position facing the front. And the swing angle is 30 °
Narrowed to. As a result, warm air is sent to a narrow area in the front direction.

If the temperature Tr _{1 at the} leftward position is lower than the temperature Tr _{2 at the} rightward position, the left and right louvers 64 are
The center position of the swing is set to the leftward A position.
Then, the swing angle is set to a larger value of 60 ° or 45 °. During cooling, cool air is sent in the direction of the high temperature side.

In this way, by detecting the temperature at the left and right positions with the indoor unit 1 as the center and setting the center position and angle of the swing of the left and right louvers 64 in accordance with the difference between the detected temperatures, the wind direction to the left and right The frequent repetition of is eliminated, and the temperature of the entire room can be made uniform quickly and surely.

In the above embodiment, the center position and angle of the swing of the left and right louvers 64 are set according to the temperature difference ΔTr, but the conditions shown in Table 2 below are stored in the control unit 70, for example. , While setting the center position of the swing of the left and right louvers 64 according to the temperature difference ΔTr,
The air volume of the indoor fan 63, that is, the speed of the indoor fan motor 63M may be set according to the temperature difference ΔTr.

[0056]

[Table 2]

In the above embodiment, the center position of the swing of the left and right louvers 64 is switched to three positions.
As shown in FIG. 14, it may be configured to switch to five positions A to E, and further to seven positions A to G as shown in FIG. In this case, if the center position moves in two steps from the A position to the C position, the next movement is limited to one step from the C position to the D position, for example, and it is considered to adopt a control to keep the change of the wind direction in a natural form. Be done. Although the reflecting mirrors 15a and 15b are provided at the same degree in this embodiment, they may be provided at different left and right angles.

That is, for example, when the indoor unit 1 is installed on the right side of the room, the temperature on the right side of the room R is mainly detected at the same degree, but the right reflecting mirror 15b.
By tightening the angle of and the angle of the left reflecting mirror 15a is made gentle, the temperature of the left and right sides of the entire R can be detected. Further, although the reflecting mirrors 15a and 15b are provided so as to be inclined inward, they may be provided so as to be inclined outward. Further, in the present embodiment, the radiant heat detecting portion 4 is provided beside the air outlet 3, but it may be provided not only horizontally but also above, below, and in the center.

[0059]

As described above, according to the present invention, the temperature at a plurality of locations in the room is detected, and the center position and the angle of the swing of the left and right louvers are set according to the difference between the detected temperatures. Thus, it is possible to provide an air conditioner that can quickly and reliably equalize the temperature of the entire room.

[Brief description of drawings]

FIG. 1 is a view showing a center position and an angle setting position of swings of left and right louvers according to an embodiment of the present invention.

FIG. 2 is an external perspective view of the indoor unit of the embodiment.

FIG. 3 is a side view of the indoor unit of the embodiment.

FIG. 4 is a plan view of an air-conditioned space showing a visual field range of the temperature sensor unit of the embodiment.

FIG. 5 is a side view of the air-conditioned space showing a visual field range of the temperature sensor unit of the embodiment.

FIG. 6 shows a configuration of a temperature sensor unit of the embodiment,
Cross-sectional view.

FIG. 7 shows a configuration of a temperature sensor unit of the same embodiment,
Front view.

FIG. 8 shows a configuration of a temperature sensor unit of the same embodiment,
Vertical sectional view.

FIG. 9 shows a configuration of a temperature sensor unit of the embodiment,
Exploded perspective view.

FIG. 10 is a wiring diagram showing a configuration of a sensor circuit of the temperature sensor unit of the embodiment.

FIG. 11 is a vertical cross-sectional view showing the configuration of part of the indoor unit of the embodiment.

FIG. 12 is a block diagram showing a configuration of a main part of a control circuit of the embodiment.

FIG. 13 is a flowchart for explaining wind direction control.

FIG. 14 is a diagram showing a modified example of the center position and the angle setting position of the swing of the left and right louvers.

FIG. 15 is a diagram showing another modification of the center position and the angle setting position of the swing of the left and right louvers.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Indoor unit, 2 ... Suction port, 3 ... Air outlet, 4 ... Radiant heat detection part, 10 ... Temperature sensor unit, 19a, 19b
... Radiant heat temperature sensor, 22 ... Reference temperature sensor, 32 ... Sensor circuit, 64 ... Left and right louvers, 70 ... Control section.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Keiichi Morita, 336 Tatehara, Fuji City, Shizuoka Prefecture Toshiba Corporation Fuji Factory

Claims (1)

[Claims] 1. Left and right louvers for changing the direction of blown wind by a swing, means for detecting temperatures at a plurality of locations in a room, and means for setting a center position of the swing of the left and right louvers according to a difference between these detected temperatures. And an air conditioner for setting the swing angle of the left and right louvers according to the difference between the detected temperatures.