JPS62202954A - Blast control device for air conditioner - Google Patents

Abstract

PURPOSE:To achieve most suitable blast control which will create a pleasant indoor environment by detecting representative temperatures inside a room and near the floor face and controlling an upper section blower and a lower section blower so that the ratio of the blast capacity of the latter to that of the former becomes larger when the difference of both temperatures becomes large. CONSTITUTION:A CPU 2 reads through an input circuit 23 a representative room temperature, T1 which is detected by a room temperature sensor 28, and T1 is compared with a first set temperature Ta which is beforehand set. If T1>=Ta, a CPU 24 reads through an input circuit 22 the temperature T2 near the floor which is detected by a temperature sensor 29, and the ratio of the output of an upper section fan motor 18 to that of a lower section fan motor 19 is controlled so that the difference between the representative room temperature T1 and the temperature near the floor, T2 becomes lower than a second set temperature tb. Because the ratio between blast capabilities of both blowers is controlled, it is possible to grasp exactly the temperature environment under various conditions in the room and there is a benefit that a pleasant room environment can be thereby obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air blowing control device for an air conditioner that provides a comfortable indoor environment.

[Conventional technology]

An air conditioner uses a fan installed in the indoor unit to draw indoor air through a heat exchanger, and controls the indoor environment by returning the air that has been heat-exchanged in the heat exchanger back into the room. I am doing it. In recent years, in order to make the indoor environment more comfortable,
Fans are installed at the top and bottom of the heat exchanger, and by installing a ventilation control device that turns on and off both fans according to the indoor temperature, the overall air volume can be switched to make the indoor environment more comfortable.

FIG. 5 shows a conventional air blowing control device for an air conditioner disclosed in, for example, Japanese Patent Laid-Open No. 55-112947. In the figure, 1 is a power switch connected in series to an AC power source 2, and 3 is a thermostat called a dual thermostat that detects the indoor temperature and performs on/off operation, and has different operating temperatures. It has two contacts 3a and 3b. The fixed contact sides of these contacts 3a and 3b are commonly connected to the output side of the power switch 1. A fan motor 4 is provided in the upper part of the heat exchanger and drives a fan that sends heat-exchanged air upward, and is connected between the movable contact side of the contact 3a of the thermostat 3 and the AC power source 1. ing. A fan motor 5 is provided at the lower part of the heat exchanger and drives a fan that sends heat-exchanged air downward, and is connected between the movable contact side of the contact 3b of the thermostat 3 and the AC power source 1. It is connected.

In the ventilation control device configured in this way, when the indoor temperature reaches the first set temperature, the contact 3 of the thermostat 3
By closing a, the fan motor 4 is driven,
The room air is circulated through a heat exchanger. next,
When the indoor temperature further rises and reaches the second set temperature, the contact 3b of the thermostat 3 closes, so the fan motor 5 is driven and the amount of indoor air circulated through the heat exchanger increases. In other words, in this case, air conditioning can be achieved in which the overall amount of air blown increases as the indoor temperature rises.

[Problem that the invention seeks to solve]

However, the temperature distribution of room temperature differs even at the same room temperature depending on the insulation structure of the room and the building load. For this reason, in the conventional air conditioner blower control device with the above configuration, even if the room temperature reaches the set temperature,
Because it is not possible to accurately grasp the indoor temperature environment,
There has been a problem in that it is not possible to perform optimal ventilation control to always create a comfortable indoor environment under various indoor conditions.

This invention was made to solve the above-mentioned problems, and provides a ventilation control device for an air conditioner that can perform optimal ventilation control to always create a comfortable indoor environment according to various indoor conditions. The purpose is to obtain.

[Means for solving problems]

The air blow control device for an air conditioner according to the present invention includes a heat exchanger provided opposite to an inlet at the center of the front face of the main body, an upper outlet provided at the upper part of the inlet, and a heat exchanger provided at the upper part of the inlet, and an upper outlet provided at the lower part of the inlet. In an indoor unit of an air conditioner, the air conditioner has a lower air outlet, an upper blower provided inside the upper air outlet, and a lower air blower provided inside the lower air outlet. temperature sensor and measure the temperature near the floor.
a second temperature sensor for moxibustion; A fan control section is provided for controlling the ratio of the air blowing capacities of the upper blower and the lower blower according to the output difference of the second temperature detector.

[For production]

The air blowing control device for an air conditioner according to the present invention detects the representative indoor temperature and the temperature near the floor using the first temperature sensor and the second temperature sensor during heating, and when the difference between the two temperatures becomes large, the upper Since the control is performed so as to increase the ratio of the blowing capacity of the lower blower to the blowing capacity of the blower, optimum blowing control for creating a comfortable indoor environment can be obtained.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. 1st
Figures ta and b) are a rear view and a side view of a floor-standing type indoor unit of a separate air conditioner to which the present invention is applied. In the figure, 11 is an indoor unit, 12 is a heat exchanger located almost in the center of indoor unit l-11,
Reference numeral 13 denotes an indoor air suction port provided at a portion facing the heat exchanger 12, 14 an upper blower provided at the upper part of the heat exchanger 12, and 15 an upper blower provided at a portion facing the upper blower 14. The outlet 16 is a lower blower provided at the lower part of the heat exchanger 14, and 17 is a lower blower outlet provided at a portion facing the lower blower 16. Further, 18 is an upper fan motor that drives the upper blower 14, and 19 is a lower fan motor that drives the lower blower 16.

FIG. 2 is a block diagram showing a fan control section that controls the upper fan motor 18 and lower fan motor 19 shown in FIG. 1. In the figure, 20 is an AC power supply, 2I is a power supply circuit that rectifies the output of the AC power supply 20 and supplies DC power to each circuit, 22 is a microprocessor that constitutes a fan control section, and an input circuit 23. Central processing unit (
(hereinafter referred to as CPU)24. Memory 25 and output circuit 2
6. 27 is a fan motor drive circuit that drives and controls the upper fan motor 18 and lower fan motor 19 in accordance with the signal supplied from the output circuit 26; 28 is a room temperature detector that detects the representative room temperature T1 from the intake air; Its output signal is supplied to the input circuit 23 of the microprocessor 22. Reference numeral 29 denotes a floor surface temperature detector for detecting the temperature T2 near the floor surface, and its output signal is supplied to the input circuit 23 of the microprocessor 22.

Next, the operation of the above configuration will be explained with reference to FIG.

FIG. 4 is a flowchart showing control specifications during heating operation in the above embodiment. First, in step 31,
The representative room temperature T detected by the room temperature detector 28 is input to the circuit 23.
In step 32, the reference air blowing output step number of the upper fan motor 18 and the lower fan motor 19 is determined. (The number of steps determines the blowing capacity of the upper blower 14 and the lower blower 16, and the higher the number of steps, the higher the blowing capacity.) Next, in step 33, the CPU 24 reads the representative room temperature T1 and sets it in advance. If T, ≧T, the process proceeds to step 34, and if T,≧T, the process proceeds to step 36, step 34.
Then, the upper fan motor 18 outputs a fixed number of steps m, and in step 35, the output circuit 26 supplies an output of a fixed number of steps n to the fan motor drive circuit 27. The rotation of the lower fan morph 19 is controlled and the process returns to step 31. In step 36,
Temperature T near the floor detected by the floor temperature sensor 29
2 is read into the CPU 24 via the input circuit 22, and then in step 37, the difference between the representative room temperature T1 and the temperature T2 near the floor surface is compared with the second set temperature difference T. and,
If T + T z≦T, proceed to step 34 and set T
If +-Tz>Tb, proceed to step 38.

In step 38, the value of m is decreased by one step and the process proceeds to step 39, and in step 39, the value of n is decreased by 1.
Step up and proceed to steps 34 and 35. Then, in step 34, the output of the upper fan motor 18 is lowered, and in step 35, the output of the lower fan motor 19 is increased to change the ratio of the air blowing capacities of the lower air blower a16 and the upper air blower a14, and then the process returns to step 31.

That is, when the representative room temperature T becomes equal to or higher than the first set temperature T1, the temperature near the floor surface T1 is detected, and the upper blower is operated so that the difference between T and T2 becomes equal to or less than the second set temperature difference Tb. The ratio of the air blowing capacity of the air blower 14 and the lower air blower a15 is changed.

In the above implementation, a case has been described in which the output ratio of the upper fan motor 18 and the lower fan motor 19 is controlled depending on the temperature difference between the representative room temperature T1 and the floor temperature Tg, but in the same configuration as the above implementation, As shown in the flowchart showing control specifications during heating operation in another embodiment shown in FIG. 6, the number n of output steps of the upper fan motor 18 is determined based on the difference between the representative room temperature T and the first set temperature Ta. Even in the case where the number of output steps n of the lower fan motor 19 is determined based on the difference between the temperature near the floor surface T2 and the third set temperature Tc, and the air blowing capacity of the upper blower 14 and the lower blower 16 is controlled, A similar effect can be obtained.

〔Effect of the invention〕

As described above, according to the present invention, in an indoor unit air conditioner having an upper blower and a lower blower, the first temperature sensor detects the indoor representative temperature and the second temperature sensor detects the temperature near the floor surface. Set up a container and place this first. Since the blower capacity ratio of the upper and lower blowers is controlled according to the output difference of the second temperature sensor, the temperature environment can be accurately grasped even under various indoor conditions, and along with this, This has the effect of providing a comfortable indoor environment.

[Brief explanation of drawings]

FIGS. 1(a) and (b) are front and side views of an indoor unit showing a blower control device for an air conditioner according to an embodiment of the present invention, and FIG. 2 is shown in FIGS. 1(a) and (b). 3 is a flowchart showing the operation of the circuit shown in FIG. 2, FIG. 4 is a flowchart showing another embodiment of the present invention, and FIG. 5 is a conventional air conditioner. FIG. 2 is a circuit diagram showing the air blowing control device of the machine. 11 is an indoor unit, 12 is a heat exchanger, 13 is a suction port,
14 is an upper blower, 15 is an upper blower, 16 is a lower blower, 17 is a lower blower, 18 is a motor for the upper blower, 1
9 is a motor for the lower blower, 20 is an AC power supply, 21 is a power supply circuit, and 22 is a microprocessor (fan control unit).
, 23 is an input circuit, 24 is a memory, 25 is a central processing unit (CPU), 26 is an output circuit, 27 is a fan motor drive circuit, 28 is a room temperature detector, and 29 is a floor temperature detector. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (3)

[Claims] (1) A built-in heat exchanger facing the suction port provided at the center of the front of the main body, an upper blowout port provided above the suction port, and a lower portion provided below the suction port. In a blower control device for an air conditioner including an indoor unit having a blower outlet, an upper blower provided inside the upper blower outlet, and a lower blower provided inside the lower blower outlet, A first temperature sensor that detects temperature, a second temperature sensor that detects temperature near the floor surface, and the upper air blower and the lower air blower according to the output difference between the first and second temperature sensors. 1. A ventilation control device for an air conditioner, comprising: a fan control section that controls the ratio of the ventilation capacity of the air conditioner. (2) When the difference in the output of the first and second temperature detectors that detect the indoor representative temperature and the temperature near the floor during heating operation becomes larger than the set value, the air blowing capacity of the upper blower and the air blowing capacity of the lower blower The air blowing control device for an air conditioner according to claim 1, characterized in that the ratio of capacity is increased. (3) Detect the indoor representative temperature and the temperature near the floor during heating operation, set the air blowing capacity of the upper blower according to the difference between the first set temperature and the indoor representative temperature, and set the air blowing capacity to the second set temperature. 2. The air blowing control device for an air conditioner according to claim 1, wherein the blowing capacity of the lower blower is set according to the difference between the temperature near the floor surface and the temperature near the floor surface.