JPS63279045A - Fan control device for air conditioner - Google Patents

Abstract

PURPOSE:To improve the accuracy of detection of temperature and a safety and to provide a comfortable fan control device by a method wherein a fan driving device of an indoor unit is driven on the basis of a result of discrimination of a room temperature comparing and discriminating means, and an amount of air controlling means is provided for terminating a fan driving device and changing over between an ultrafine air discontinuous operation and a fine air blowing operation. CONSTITUTION:An air circulation operation is selected by a mode selection switch at an operating panel part B and an operation is started by turning of an operation stop switch. At this time, a blower is kept at its stopped condition. In case that a time T1 is elapsed and a room temperature is lower than a predetermined room temperature, a blower 3 is operated and an indoor unit 11 is kept at an ultra air discontinuous operating condition. A room temperature (t) is detected by a room temperature detecting means 4, a predetermined temperature set in a set temperature memory means 5 and the detected temperature (t) are compared with each other by the room temperature comparing and discriminating means 6. In case the room temperature (t) is lower than the predetermined temperature, the original condition is kept as it is. In case the predetermined temperature is higher than the detected temperature, the indoor unit 11 shows an ultrafine air blowing condition. In case the room temperature (t) is detected and compared with the predetermined temperature and discriminated and in case that the room temperature is higher than the predetermined temperature, the condition is kept as it is and in turn in case the room temperature is lower than the predetermined temperature, the blower is stopped again.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is mainly applicable to cases where the blower of an air conditioner is used for air circulation in a conditioned space that uses a heater other than a heat pump type air conditioner. This invention relates to a fan control device.

Conventional technology Conventionally, when using a blower device of an air conditioner for air circulation, the operating device that operates the blower device stores the detection result of the temperature detection means for detecting the temperature of the air-conditioned space in the detected temperature determination means. Compared to a certain set temperature, if the temperature was higher, it would be activated, and if it was lower, it would be stopped. Further, the air blowing state after the operating device is activated is in accordance with the contents of the fan speed storage means that stores the set fan speed.

Problems to be Solved by the Invention According to the above-mentioned conventional technology, when the room temperature is lower than the set temperature, the blower is stopped, so the temperature around the temperature thermistor that constitutes the temperature detection means is There is very little air convection, and even if the temperature in the air-conditioned space rises due to a heater, etc. and becomes higher than the set temperature, the detected temperature determination means will not work because there is very little air convection around the temperature thermistor. By the time it is determined that the room temperature detected by the temperature thermistor is higher than the set temperature, the actual room temperature has become even larger than the set temperature, and the temperature distribution in the air-conditioned space is upward. This uneven state where the temperature is high and the temperature below is low continues to be extremely uncomfortable for the user of the air conditioner. Furthermore, after the blower is activated, the fan speed will be the arbitrary fan speed set by the operator, but if a combustor is used as a heater and the fan speed is at maximum, the blowing air hitting the combustor will The flame of the combustor fluctuates, which tends to cause incomplete combustion, and the amount of circulating air in the air-conditioned space is excessive, causing carbon dioxide present in the air above.
O2 reaches all the way to the bottom, and Co/CO2 in the air-conditioned space
The ratio increased, which could easily lead to a situation that would adversely affect the human body in terms of safety.

The present invention provides a comfortable 7-amp control device that improves the accuracy and safety of detected temperature, which are the problems of the prior art.

Means for Solving the Problems In order to solve the above problems, the fan control device for an air conditioner according to the present invention includes a room temperature detection means for detecting the room temperature, a set temperature storage means for storing a preset temperature. , a room temperature comparison and determination means for comparing and determining the room temperature detected by the room temperature detection means and a set temperature stored in the set temperature storage means, a timer for measuring fan stop time, and a room temperature comparison and determination means. Based on the determination result, air volume control means is provided to drive the fan drive device of the indoor unit, stop the fan speed, and switch between ultra-light intermittent operation and strong wind operation.

Effect: With the above-described configuration, the indoor fan speed is set to a fixed blowing operation when the room temperature reaches the set temperature, and when the room temperature falls below the set temperature and the air blowing operation is stopped, the room temperature rises. Even if there is no air flow, the temperature is detected as an intermittent ultra-breeze operation after a certain period of time, so the air flow around the thermistor that detects the room temperature continues the convection for temperature detection almost all the time. It becomes possible to detect. Furthermore, even if the room temperature is higher than the set temperature, the fan speed is fixed at a light breeze, so the room temperature distribution in the air-conditioned space is uniform and comfortable. By fixing the breeze, it is possible to eliminate the occurrence of incomplete combustion due to blowing air hitting the heating combustor, etc., and improve safety for users.

EXAMPLE The present invention will be described below with reference to the accompanying drawings showing one example thereof.

FIG. 1 shows the configuration and block diagram of a fan control device in this embodiment.

In the figure, 1 is an indoor heat exchanger of an air conditioner, 2 is a multi-type 7-amp for blowing air, and 3 is a 7-piece for driving a multi-blade fan for blowing air.
It is an unmotor. The air conditioner fan control device of this embodiment is for the case where the indoor unit 11 of the air conditioner is used only for blowing air for air circulation in winter, and when the air conditioner is used for air circulation, Mode selection switch 82 in operation section B of indoor unit 11 shown in FIG.
It becomes possible to use the air circulation switch S4 by selecting the air circulation switch S4. Reference numeral 4 denotes a room temperature detection means, which is provided on the front surface (suction side) of the indoor heat exchanger 1 of the indoor unit 11. Reference numeral 5 denotes a set temperature storage means, and a room temperature comparison and determination means 6 determines whether the temperature detected by the room temperature detection means 4 is higher or lower than the set temperature stored here. The result determined by the room temperature comparison and determination means 6 is processed by the arithmetic unit 7. When the room temperature detected by the room temperature detection means 4 is lower than the set temperature stored in the set temperature storage means 5, the computing unit 7 stops the fan driving device 8.

After the fan drive device 8 is stopped and a certain period of time T1 has elapsed, the computing unit 7 drives the fan drive device S, and at the same time, the fan speed is changed to ultra-light air at the first to third output sections 9.10'' or 12. The output is output to the corresponding third output section 12, and the fan motor 3 and the ventilation fan 2 are operated in an ultra-light air state.

Next, when the room temperature detected by the room temperature detection means 4 is higher than the set temperature stored in the set temperature storage means 5, the calculator 7 sets the fan speed to the third output part on the side corresponding to the ultra-light wind. 1
2 is stopped, and the power is output to the second output section 10 to operate the fan motor 3 and the multi-blade fan 2 in a light breeze state.

Next, the structure of the shimiko control circuit will be explained with reference to FIG.

In FIG. 2, A is a control section housed within the indoor unit 11, and B is an operation section provided outside the indoor unit 11. In the control unit A, reference numeral 13 is an AC power supply unit, and the voltage of the AC power is stepped down by a step-down transformer 14, and the DC power supply voltage is supplied to the control unit A by a rectifier circuit 15.

Specifically, in FIG. 2, the thermistor 16 corresponds to the room temperature detection means 4 in FIG. It is input to port 20 of The set temperature storage means 5, room temperature comparison and utilization means 6, arithmetic unit 7, and fan drive device 8 in FIG.
It is stored inside and is functioning. 18 is an output section [,
R1 is a relay that drives the compressor in the outdoor unit and the outdoor 7-arm motor, and R2, R3, R4, and R5 are relays that select the speed of the 7-arm motor 3 in the indoor unit 11, and are used for air circulation in this embodiment. This relay is necessary to achieve air blowing. When using the indoor unit 11 for air circulation, relay R5 is turned off when the blower is stopped, and if the room temperature does not rise after that and a certain period of time has elapsed, relay R5 is opened and closed and relays R2 and R3 of the output section 18 are activated.
is always energized, and relay R4 is energized or shut off to realize intermittent ultra-breeze operation when the room temperature is lower than the set temperature, and gust operation when the room temperature is higher than the set temperature.

Next, the control details of the fan control device of the air conditioner will be explained with reference to FIG.

In FIG. 3, in step 1, the air circulation operation is selected by the mode selection switch 54 of the operation section B, and the air circulation operation is started by turning on the operation stop switch S1. At this time, relay R5 is powered off and the blower is stopped. Proceeding to step 2, it is determined whether the set time has elapsed. If the set time T1 has not elapsed, the current state is maintained.

If the time T1 has elapsed, the process moves to step 3.4 and the magnitude of the set temperature and room temperature is determined. If the room temperature is higher than the set temperature, proceed to step 9; if it is lower, proceed to step 5. Moving on to step 5, the relays R2 to R4 in the output section 18 of the control section A
is energized, and relay R5 repeats opening and closing. Relay R4
When energized, the process moves to step 6 and the blower 3 is operated.
The indoor unit 11 is maintained in a state of intermittent ultra-breeze operation. In step 7, the room temperature detection means 4 detects the room temperature t. Next, in step 8, the set temperature (25°C in this embodiment) set in the set temperature storage means 5 and the detected temperature t
and are compared by another means 6 of room temperature comparison. If the room temperature t is lower than the set temperature (25° C.), the current state is maintained. If the room temperature t is higher than the set temperature, the process moves to step 9.

In step 9, the relay R4 in the output section 18 of the control section A enters a power outage state, and the indoor unit 11 enters a gust operation state. In step 10, the room temperature t is detected again, and in step 1
1, it is compared and determined with the set temperature. In step 11,
If the room temperature is higher than the set temperature, the current state is maintained; if it is lower, the process moves to step 1, where the relay R5 in the output section 18 of the control section A is cut off, and the blower is stopped again. The above operations are repeated until the operation is stopped.

Effects of the Invention As described above, the present invention allows the blowing operation of the air conditioner to be controlled depending on the indoor air temperature when the blowing operation of the air conditioner is used for air circulation in an air-conditioned space using a heater. The temperature detected by the room temperature detection means that detects the temperature is controlled by the discrimination means that compares and discriminates the detected temperature and the set temperature, and the timer means. It is equipped with an air volume control means that operates intermittently, and after reaching the set temperature, operates in a rush mode, and when the temperature of the air-conditioned space increases due to the heater, the air around the temperature thermistor installed in the air conditioner is The temperature is always accurately sensed by the temperature thermistor without any time lag. As a result, since the air conditioner starts operating accurately when the air temperature reaches a constant two-way temperature, it is possible to prevent the heater user from experiencing an uncomfortable situation where the upper part of the vertical temperature distribution of the living space is hot and the lower part is cold. In addition, the fan speed is fixed at two speeds: stop when the air temperature is lower than the set temperature and intermittent operation with ultra-low breeze, and operation with slight fan when the air temperature is higher than the set temperature, so it can be used in combustors such as kerosene heaters etc. This prevents incomplete combustion due to flame fluctuations, etc.
Safety can be ensured.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a fan control circuit of an air conditioner (indoor side) having a fan control device according to an embodiment of the present invention, FIG. 2 is an electronic circuit diagram having the same fan control circuit, and FIG. is a flowchart showing the control contents of the fan control device. 3...Fan motor, 4...Room temperature detection means, 5...Setting temperature storage means, 6...
・Room temperature comparison/determination means, 7... Arithmetic unit, 8...
...Fan drive device. Name of agent: Patent attorney Toshio Nakao and 1 other person/-
--Indoor heat exchange 1st class 2-11 Muroko fan 3-11 fanmoke 4- Murotsu therapy 5-11 after constant temperature change 1st year Autumn 6th ---Room temperature specific decay-r different hand General 7 --- Arithmetic unit 8-11 Fan information 1 Estimation date -- Ascension I... Gato Figure 3

Claims (1)

[Claims] It is equipped with a temperature detected by a room temperature detection means that detects the indoor air temperature, a determination means for comparing and determining the detected temperature and a set temperature, and a timer means, and further includes a temperature difference between the set temperature and the set temperature to stop or stop for a certain period of time. A fan control device for an air conditioner that is equipped with an air volume control means that later intermittents a very light breeze, and then operates with a strong breeze after reaching a set temperature.