JPS63143446A - Air conditioner - Google Patents

Abstract

PURPOSE:To further increase the air conditioning comfortableness at the time of starting the space heating operation of the air conditioner by providing discharge air flow control means successively changing a horizontal deflection plate from a horizontal discharge direction to a perpendicular downward discharge direction and then in a slanting direction between the horizontal discharge direction and the perpendicular downward discharge direction, based on detected temperatures. CONSTITUTION:An operation switch 34 and a comparison circuit 35 are connected to a discharge air flow control device 33. The comparison circuit 35 compares an indoor temperature signal from a room temperature detection sensor 31 with a desired set temperature of a resident, and outputs a indoor thermostat 'ON' signal when the compared result does not reach the desired set temperature. In accordance with the deflection angle of a horizontal flap 6 properly determined by a discharge air flow control device 33 and the rotational speed of a blast fan 3, the setting change of the horizontal flap 6 is carried out by a step motor 20 through a stepping motor control device 38 and that of the blast fan 3 is carried out by a fan control device 39.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an air conditioner, and in particular, improves air conditioning comfort by automatically changing the blowing direction of air when starting heating operation. related to air conditioners.

(Conventional technology) When heating a room with a wall-mounted UA air conditioner, the warm air rises by natural convection, so the warm air blown from the air conditioner body is placed on the floor or at people's feet. By directing the air toward the air, a suitable air conditioning condition can be provided throughout the room.

Therefore, the horizontal direction deflection plate of the blown air provided in the air conditioner main body is normally set at a downwardly inclined position during heating. However, when starting the device,
The heat exchanger inside the air conditioner body is at a low temperature, and until the temperature rises, cold air is blown out from the body, and this cold air hits the human body, resulting in a loss of air conditioning comfort. Ta. Therefore, JP-A-58-88549
In the device shown in the publication, as shown in Fig. 7,
Horizontal deflection plate 61 disposed on the blowout grille 60
is made of a shape memory alloy, and when the blowing temperature is low, the blowing direction (A) is given to blow out horizontally over the head of the person, and when the blowing temperature exceeds, for example, 40°C, the horizontal direction deflection plate 61 deforms in a downwardly inclined direction in response to the temperature, and therefore the blowing direction is automatically changed to the occupant direction (B). This is intended to prevent discomfort caused by the blowing of cold air at the time of startup, and to improve air conditioning comfort during heating operation.

(Problem to be Solved by the Invention) However, as in the conventional device described above, even if the blowing direction is changed toward the occupant after waiting for the Suita temperature to exceed a predetermined temperature after starting the heating operation, the Since the indoor temperature at that point in time is still low, the temperature of the blown air that exceeds the -F distribution temperature will drop due to the cold air in the room before it reaches the occupants, and therefore the occupants will experience a temperature drop. This will result in a low airflow. Therefore, there is a problem in that the airflow feeling at that time still makes the user feel a cold breeze.

This invention was made to solve the above-mentioned conventional problems, and its purpose is to provide an air conditioner that can further improve air conditioning comfort when starting heating operation.

(Means for Solving the Problems) Therefore, the air conditioner of the present invention includes a heat exchanger 2, a blowout temperature detection means 8 that detects the temperature of the blowout air blown into the room through the heat exchanger 2, The air conditioner has a horizontal deflection plate 6 for changing the blowing direction of the blowing air in the vertical direction, and is installed at a high place on a wall, and furthermore, the temperature is detected by the Suita temperature detection means 8 at the time of startup. Air blowing control that sequentially changes the horizontal deflection plate 6 from a horizontal blowing direction to a vertical downward blowing direction, and then to an inclined direction between the horizontal blowing direction and the vertical downward blowing direction, based on the detected temperature. It has means 33.

(Function) In the air conditioner having the above configuration, the outlet air control means 33
Accordingly, the horizontal deflection plate 6 is first set in the horizontal blowing direction at the time of starting. In this position, the blown air is blown over the person's head, so even if the heat exchanger 2 is in a low temperature state immediately after startup, the blown air will not directly hit the human body, which will cause discomfort. No. Based on the detected temperature of the blown air by the blown air temperature detection means 8, the horizontal deflection plate 6 is then changed to the vertically downward blowing direction. This airflow causes the heated air to flow downward along the wall.
This creates an indoor airflow that spreads over the floor. In such airflow conditions, even if there is a person in the center of the room, the person will not feel the airflow as if the wind is directly hitting them. The whole area is gradually heated from the floor.

With the room temperature raised in advance in this manner, the horizontal deflection plate 6 is then changed to the ('Jt t4 direction), thereby blowing out warm air toward the occupant.

(Embodiments) Next, specific embodiments of the air conditioner of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a side view of an air conditioner main body 1 that is installed at a high place on a wall according to an embodiment of the present invention.

As shown in the figure, an indoor heat exchanger 2 and a blower fan 3 are disposed inside the main body 1, and when the blower fan 3 is activated, air is drawn into the room from a suction grill 4 formed on the front surface of the main body 1. Air is sucked in, and the air that has passed through the indoor heat exchanger 2 is blown out from a blow-off grille 5 formed at the lower part of the front side. A horizontal deflection plate, that is, a horizontal flap 6, and a vertical direction deflection plate, that is, a vertical flap 7, are arranged on the above-mentioned blowout grille 5 for controlling the direction of the blowing air. On the other hand, in the indoor heat exchanger 2, a heat exchanger temperature detection thermistor (hereinafter referred to as a heat exchanger thermistor) 8, which serves as a blowout temperature detection means, is attached to the blower fan 3 side. The thermistor 8 provides temperature information about the temperature of the indoor heat exchanger 2, and therefore the temperature of the air that passes through the indoor heat exchanger 2 and is blown out from the outlet grille 5.

As shown in FIG. 2, the horizontal and vertical flaps 6.7 are connected to the first step motor 20 and the vertical flap 7 to the second step motor 21 through link mechanisms, respectively. has been done. Each of the flaps 6 is controlled by the rotation of each step motor 20.2.
．． By changing the direction of the main body 1, the direction of the air blown from the main body 1 can be changed to any desired direction.

In order to operate the device at a location away from the air conditioner body 1, a remote control switch box is provided, and this remote control switch box has a room temperature sensor for detecting the indoor temperature. Sensor is attached. This room temperature detection sensor provides room temperature information near the occupant, and is attached to a remote control switch box with a structure as shown in FIG. 6. In other words, in the same figure,
Reference numeral 22 indicates the entire remote control switch box, and the surface of the casing 23 is coated with paint having an emissivity approximately equal to that of the human body, and a thermistor 31 is installed inside the casing 23. , is placed in contact with its inner surface. Note that the thermistor 31 is surrounded by a heat insulating material 24. The reason why the room temperature detection thermistor 31 is mounted in this structure is to detect the room temperature in consideration of the exchange of radiant heat between the human body and the surroundings. In other words, during heating operation and cooling operation, the amount of radiant heat exchanged between the human body and the wall surface is different due to the difference in wall temperature, etc., so the casing 23 has a similar effect. This is to make the temperature at the room temperature detection sensor 31 as close as possible to the temperature actually felt by the human body, thereby providing comfortable air conditioning.

FIG. 3 shows a block diagram of a control system that controls the horizontal flap 6 during heating operation based on temperature information from the heat exchanger thermistor 8 and the room temperature detection thermistor 31. Note that the vertical flap 7 is set at a deflection angle position such that the air is blown out toward the approximate center of the room during heating operation, which will be described later.

In FIG. 3, reference numeral 31 denotes a room temperature detection sensor consisting of a thermistor for detecting the indoor temperature, and the indoor temperature detection signal of this room temperature detection sensor 31 and the blowout temperature detection signal of the heat exchanger thermistor 8 are respectively The detected temperature calculation circuit 32 converts the temperature information into appropriate temperature information, and inputs the temperature information to a blowout air control device 33 that serves as a blowout air control means. This blowout air control device 33 further includes an operation switch 34,
Further, a comparison circuit 35 compares the indoor temperature signal from the room temperature detection sensor 31 with the occupant's desired set temperature, and outputs an indoor thermo ON signal if the desired set temperature has not been reached.
are connected. Further connected to the blowout air control device 33 are a timer 36 that measures a preset time in conjunction with the blowout air control device 33, and a start-up completion determination counter 37, which will be described later. Then, depending on the deflection angle of the horizontal flap 6 and the rotation speed of the blower fan 3, which are appropriately determined by the blowout air control device 33, the horizontal flap 6 is operated by the step motor 20 via the step motor control device 38, and the blower fan 3. is fan control device 3
9, the settings are changed.

Next, a control method for the horizontal flap 6 and the blower fan 3 during the heating operation as described above will be explained in detail based on the flowchart of FIG. 4.

When heating operation is started by operating the operation switch 34, initial settings are first made in step S1. At this time, the horizontal flap 6 is set at a horizontal position, that is, at a deflection angle of O°.

As a result, the cold air blown out through the indoor heat exchanger 2, which is in a low temperature state immediately after the start of operation, is blown out over the heads of the occupants, so that they do not feel cold air. In the above step S1, a timer (
r) The reset operation in (II) and the start-up completion determination counter are set to "O". Then step S2
Then, the ON-OFF state of the indoor sensor is determined. It is assumed that the heating operation is started when the indoor temperature is lower than the occupant's desired temperature setting, so here it is assumed that the ON signal is input from the indoor thermometer, and the control transition from step S2 to step S3 is performed. First, let me explain. Step S3 is a step for determining the state of the start-up completion determination counter. When the device is started, the initial setting value "0" in step St is still the same, so the process moves to step S4, and steps S4 to S1
The start-up control of the blowout air volume is performed based on the blowout temperature Tc reaching 3. That is, in step S4, the blowing temperature Tc
Steps S4 to S35 are carried out until the temperature reaches 20°C.
Further, the execution steps S2, S3, and S4 are cyclically repeated, and at this time, in step S5, the rotation speed of the blower fan 3 is set to a rotation speed corresponding to the ultra-light wind,
The ventilation operation in this state is continued. During this time, while monitoring the change in the indoor thermostat to the OFF state in step S2, the temperature rise of the blowout temperature ↑C is waited for. Then, when the above Tc reaches 20°C, the process moves from step S4 to 36, and continues until the above Tc reaches 25°C.
In Step S7, the air flow rate is changed to a light breeze, and similarly to the above, the air blowing operation in this state is not continued until the temperature Tc rises. If Tc reaches 25°C, step S
6 to 38, and the operation with the set air volume changed to the weak wind in step S9 is continued until Tc reaches 35°C, and when the temperature reaches 35°C, the process moves to SIO from step S8. In step SIO, the time value of the timer (■) is determined. At this time, the timer (1) is in the state where the reset operation in step S1 has been applied, so the above-mentioned blowout temperature Tc has reached 35°C. The timing operation of the timer (+) starts from the time when the process moves from step S8 to S10 and further to step Sll, and then from step S9 to steps S2, S3, S4, S6, S
Step 8, SIO, and Sil are repeated to continue the time counting operation of the timer (T). Therefore, operation in low wind is performed for an additional minute after Tc reaches 35°C. Then, when the time measured by the timer (1) reaches 1 minute, the process moves from step SlO to S12, where the air volume is changed to the one set by the user (weak wind, medium wind, strong wind), and in step S13, the air flow is further Until the temperature Tc becomes 38°C or higher,
Continue operation at the air volume setting above. In this way, by performing start-up control that gradually increases the air volume according to the blowout temperature Tc at start-up, stirring of the indoor air by cold air at start-up is suppressed, giving the user a feeling of cool air. I try not to.

If it is determined in step S13 that the blowing temperature Tc is 38° C. or higher, the process moves from step S13 to S14. In the process of cyclically repeating from step 514 to S15, S16, returning to S2, passing through each of the above discrimination steps, and returning to 514, step S16
Directly below the horizontal flap 6 at , that is, the deflection angle 9
The blowing at 0° is continued for 2 minutes from the time the blowing temperature reaches 38°C or higher. After two minutes have elapsed, the process moves from step S14 to S17, S16, and returns to S2, and the above-mentioned direct downward blowing is maintained until the room temperature reaches 17° C. or higher. Then, when the room temperature reaches 17 degrees Celsius or higher, the process moves from step S17 to 318, and the horizontal flap 6 is changed to a set angle (for example, 70 degrees), and from this point on, the air blows toward the central area of the room, that is, toward the occupant. It is done. After the deflection angle in the inclination direction of the horizontal flap 6 is set as described above, in step S2, the setting state is maintained until the indoor temperature reaches the temperature desired by the occupant, that is, until the indoor thermostat is turned off. Heating operation continues. When the indoor temperature reaches the desired set temperature, the process moves from step S2 to S19, and at this time, the circulation of the refrigerant flowing through the indoor heat exchanger 2 is stopped, so hot air cannot be blown out. The rotation speed of is changed to a speed that corresponds to ultra-light winds, or it is stopped. At this time, the timer (II) is reset and the start-up completion ゛μj separate counter ``1'' is set. In this state, the system waits for input of an ON signal from the next indoor thermostat (steps S2 and S19). When the room temperature becomes lower than the desired set temperature and an ON signal is input from the indoor thermostat, steps S2 to 83 and step S2 are performed.
0, and in step S20 the blowout air volume is changed to the rotational speed of the blower fan 3 corresponding to the air volume set by the user, and at the same time, the process moves to step S14 and restarts from the control of changing the horizontal flap 6 described above directly downward. I am planning to do so.

As described above, in the above embodiment, when the heating operation is started, the air is blown horizontally over the head of the person while the air temperature is low, and after the air temperature reaches warm air, the horizontal flap 6 is moved directly below the air. It has been changed to At this time, the blown air is blown out along the wall surface and becomes an air current that spreads over the floor surface. This heats the room without making the occupants feel any airflow. Therefore, even if the blowing direction is subsequently changed to the direction of the occupant, the occupant will not be exposed to the cold airflow, so air conditioning comfort will be improved without giving the feeling of cold air as in conventional devices.

Further, in the above-mentioned embodiment, even when the indoor thermostat is restarted by the indoor thermo ON signal, the control is resumed by first changing the horizontal flap 6 directly downward.

When the indoor heat exchanger 2 is turned on, the indoor temperature and the temperature of the indoor heat exchanger 2 that has been stopped are slightly lower than during heating operation, and when the indoor heat exchanger 70 is turned on, there is almost no wind in the room. If the air is suddenly blown toward the occupant in this state, the perceived temperature will be felt to be lower due to the sensation of the airflow. Therefore, by implementing the control described above, it is possible to recover the indoor temperature and soften the change in the airflow sensation felt by the occupants, thereby making it possible to provide a suitable heating sensation without making the occupants feel cold. .

Figure 5 (al (b)) shows the elapsed time after the start of heating operation,
This is measurement data of temperature and wind speed at a point 10 cm above the floor at a position 2 m away from the air conditioner main body. The sensible temperature calculated from the above temperature and wind speed is also recorded. In the same figure (a), the deflection angle of the horizontal flap 6 is 70
This data is for a case where the temperature is fixed at 0.degree., and as shown in the figure, there is a rapid drop in the sensible temperature immediately after the start of operation. On the other hand, is the horizontal flap angle mentioned above?
This is data when 61J control and air volume control are performed.
There is no drop in perceived temperature, and a suitable heating sensation is provided that is approximately proportional to the rise in room temperature.

In the above embodiment, after the horizontal flap 6 is set in the vertical downward blowing direction, the inclination direction is changed toward the occupant at a preset deflection angle (70°). A configuration may also be adopted in which a person's position detection device is provided and the blowing direction is automatically changed according to the detected position. Further, in the above embodiment, a device that can automatically change the air volume has been described, but the present invention can be applied to other devices that can control the deflection angle of horizontal flaps to improve air conditioning comfort. can.

(Effects of the Invention) As described above, in the air conditioner of the present invention, when heating is started, the room temperature is raised without giving the occupant a direct feeling of airflow, and then air is blown in the horizontal direction toward the occupant. Since the deflection plate is controlled, the process of giving the occupant a feeling of cold air when heating is started in the conventional device is eliminated, and therefore air conditioning comfort during heating operation is improved.

[Brief explanation of the drawing]

FIG. 1 is a side view of the air conditioner main body in an embodiment of the air conditioner of the present invention, FIG. 2 is a perspective view of the horizontal flap and vertical flap attached to the device of FIG. 1, and FIG. Control block diagram of the horizontal flap and blower fan, Figure 4 is a control flowchart, Figure 5+a) is data showing temperature changes after the start of heating operation when the deflection angle of the horizontal flap is fixed, 5th issue) Figure 6 is data showing the temperature change after the start of heating operation when the deflection angle of the horizontal flap is controlled based on this invention, Figure 6 is a sectional view showing the mounting structure of the room temperature detection sensor, and Figure 7 is the air temperature change in the conventional device. FIG. 3 is a side view showing the internal configuration of the m-wafer machine body. 2... Indoor heat exchanger, 6... Horizontal flap (horizontal deflection plate), 8... Heat exchanger thermistor (blowing temperature detection means), 33... Blowing air control device (blowing air controlling means) .

Claims (1)

[Claims] 1. A heat exchanger (2), a blowout temperature detection means (8) for detecting the temperature of the blowout air blown into the room through the heat exchanger (2), and changing the blowing direction of the blowout air to the vertical direction. The air conditioner has a horizontal deflection plate (6) for controlling the air conditioner, and is installed at a high place on a wall. , a blowout air control means (33) for sequentially changing the horizontal deflection plate (6) from a horizontal blowing direction to a vertical downward blowing direction, and then to an inclined direction between the horizontal blowing direction and the vertical downward blowing direction; An air conditioner characterized by having: