JPH0926191A - Air conditioning equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display the consuming condition of power of an air conditioning equipment accurately on a display section of a room unit. SOLUTION: This air conditioning equipment has a room unit 2 containing at least a room heat exchanger and a room fan 7 and an outdoor unit 4 containing at least a compressor 5, a four-way valve, an expansion valve, an outdoor heat exchanger and an outdoor fan. This equipment also includes a current display means 29 which detects current used by the outdoor unit 4 and corrects the current detected by a correction value to display the results on a current display section 21 of the room unit 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a split type air conditioner in which an indoor unit is separated from an outdoor unit, and more particularly to an air conditioner having an improved method of displaying a used current.

[0002]

2. Description of the Related Art Heretofore, some air conditioners of this type have an indoor controller displaying a value proportional to the number of revolutions of the compressor per unit time as a standard of power consumption.

[0003]

However, in such a conventional air conditioner, the rotation speed of the compressor is
It is not necessarily proportional to the actual power consumption.For example, when the compressor is overloaded or the state of the refrigeration cycle, the proportional relationship fluctuates especially due to pressure fluctuations. is there.

Therefore, an object of the present invention is to provide an air conditioner capable of accurately displaying the power consumption state of the air conditioner on the display unit of the indoor unit.

[0005]

According to a first aspect of the present invention, there is provided an indoor unit having at least an indoor heat exchanger and an indoor fan, and at least a compressor, a four-way valve, an expansion valve, an outdoor heat exchanger, and an outdoor fan. In an air conditioner having a built-in outdoor unit, a current display means for detecting a current used in the outdoor unit, correcting the detected current with a predetermined correction value, and displaying the corrected current on the display unit of the indoor unit. It is equipped with.

The invention of claim 2 is the invention of claim 1, wherein the current display means displays a current detection circuit for detecting a current used in the compressor and current value data detected by the current detection circuit. A transmitter for transmitting to the communication unit of the indoor unit, a correction unit for correcting the current value data received by the communication unit of the indoor unit with a predetermined correction value,
The display unit displays the current value corrected by the correction unit.

The invention of claim 3 is the invention of claim 1 or 2, wherein the correction section corrects the current value used from the outdoor unit by a correction value based on the operating frequency of the motor for driving the indoor fan. Is characterized in that.

The invention of claim 4 is the invention of claim 1 or 3, wherein the correction section uses the maximum current value in the use range of the indoor fan as a fixed correction value.

According to a fifth aspect of the invention, an indoor unit containing at least an indoor heat exchanger and an indoor fan, and an outdoor unit containing at least a compressor, a four-way valve, an expansion valve, an outdoor heat exchanger, and an outdoor fan. In the air conditioner having the above, the current display means for displaying the used current detected by the current detection circuit provided on the power supply line common to the indoor and outdoor units on the display unit of the indoor unit.

[0010]

According to each of the first to fourth aspects of the invention, a correction value based on, for example, the number of revolutions of the indoor fan per unit time is added to the current used by the compressor or the like on the outdoor unit side as the current used on the indoor unit side. Since the used current is displayed on the current display section of the indoor unit after correction such as turning on, the power consumption status of the entire air conditioner can be displayed with high accuracy on the indoor unit.

According to the invention of claim 4, as the correction value in each of the inventions of claim 1 or 2, the maximum current value in the use range of the indoor fan is used as a fixed correction value, so that the correction means has a simple correction configuration. With, it is possible to make a display similar to the actual power consumption.

According to a fifth aspect of the present invention, a current detection circuit is provided on the power supply line common to the indoor and outdoor units, and the current value detected by this current detection circuit is displayed on the display unit of the indoor unit. Since the value is already the sum of the currents used by the indoor and outdoor units respectively, it does not need to be corrected. Therefore, the current detected by the current detection circuit can be accurately displayed on the current display unit as the current used by the air conditioner without correcting the current.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 6, the same or corresponding parts are designated by the same reference numerals.

FIG. 2 is an overall configuration diagram of an embodiment of the present invention. In this figure, an air conditioner 1 has an indoor unit 2 and a remote controller 3 shown in FIG. 3, and an outdoor unit 4 shown in FIG. Compressor 5, four-way valve 6, indoor fan 7
Indoor heat exchanger 8 equipped with, expansion valve 9, outdoor fan 10
The outdoor heat exchanger 11 provided with is connected in this order by the refrigerant pipe 12 in this order to form a closed refrigeration cycle for circulating the refrigerant.

Further, in the air conditioner 1 of this refrigeration cycle, the indoor heat exchanger 8 having the indoor fan 7 is built in the indoor unit 2, while the outdoor unit 4 has other refrigeration cycle components. A drive circuit 13 including an inverter that drives the compressor 5 to control the rotation speed, an outdoor controller 15 including a microcomputer having a serial communication circuit 14, and the like are incorporated.

The indoor unit 2 includes an indoor controller 17 including a microcomputer having a serial communication circuit 16 for performing bidirectional data communication with the serial communication circuit 14 of the outdoor unit 4, a temperature sensor 18 for detecting room temperature, and humidity detection. A humidity sensor 19 and a heat exchange sensor 20 for detecting the temperature of the indoor heat exchanger 8 are incorporated.

Further, the indoor unit 2 has a current display section 21 for displaying a current used by the entire air conditioner 1, and a remote controller 3.
The receiving unit 23 receives the operation signal such as infrared rays transmitted from the transmission circuit 22 and supplies it to the indoor controller 17.

As shown in FIG. 3, the indoor unit 2 has a front panel 24 having a suction grill 25 formed substantially in the center thereof and an outlet grill 26 formed at the lower portion thereof. As shown in 5, the current display 2
1 and the receiving section 23 are arranged vertically, and a power cord 27 is connected to a power plug 27 which is inserted into, for example, a commercial power outlet (not shown) of 100V.

FIG. 1 shows the electrical construction of the current display means 29 for displaying the current used by the air conditioner 1 on the current display portion 21. The current display means 29 is provided in the power cord 28 and in the indoor unit 2. The built-in power supply circuit 30 and the drive circuit 13 built in the outdoor unit 4 are connected to each other, and the current detection circuit 31 is electrically connected to the power supply line on the input side of the drive circuit 13 to drive the drive circuit 13. Circuit 1
A current flowing into the compressor 5 through the compressor 3, that is, the current Ic used in the compressor 5 is detected, and the detected current value Ic is detected by the outdoor controller 15 by the serial communication circuit 1.
4 is transmitted to the serial communication circuit 16 of the indoor unit 2 and given to the indoor controller 17.

When the indoor controller 17 receives the current value Ic data used in the compressor 5, the indoor controller 17 reads the rotation speed per unit time from the indoor fan 7 by the CPU 17a.
Then, the correction value α is added to the current value Ic to obtain the correction current Io.
A correction unit 17b that calculates (Io = Ic + α) and a display control unit 17c that causes the current display unit 21 to display the correction current Io as the current Io used by the air conditioner 1 are included.

The correction unit 17b adds the used current of the indoor fan 7 to the used current Ic of the compressor 5 as a correction value α, and the correction value α is, for example, the following (1).
As shown in the equation, the rotation speed N (r of the indoor fan 7 per unit time is
pm).

[0022]

[Formula 1] α = β × N (rpm) + γ β = 1A / maximum set speed Nmax (rpm) γ: correction value (fixed value) Further, this correction value α is the maximum in the use range of the indoor fan 7. The current value may be a fixed correction value, and according to this, the rotation speed of the indoor fan 7 is always detected and the CPU
With 17a, it is not necessary to read and calculate, and a display similar to actual power consumption is possible with a simple configuration.

From the power plug 27, the power circuit 30 of the indoor unit 2 and the drive circuit 1 of the outdoor unit 4
A current detection circuit may be connected to the power supply line on the upstream side of the shunting portion that divides the current into each of the compressor 3 and the compressor 3. According to this, the current detected by the current detection circuit is the compressor 5 and the indoor fan 7 Since it is the total value of the currents used by and, it is not necessary to correct the used current Ic of the compressor 5 as in the above embodiment, and the circuit configuration can be simplified.

The current display unit 21 is constructed in a digital bar display system as shown in FIG. 5, for example, and a translucent display bar 32 having a horizontally long rod shape is divided into, for example, four equal parts 32a, 32b, 32c ,.
32d, the operation part for displaying whether or not the air conditioner is in operation is integrally formed, and operation, 5A, 10A,
15A is displayed respectively.

That is, as shown in FIG. 6, two light emitting elements such as LEDs (light emitting diodes) 1 and 2 are built in the operating portion 32a of the display bar 32.
1 LED3, 4 and 5 are respectively built in the 15A section, and the first terminal t1 of these LEDs 1 to 5 is energized to cause the LED 1 to emit light, thereby causing the operating section 32a to emit light for heating (red). ), And the second terminal t2 is energized to LE.
By causing D2 to emit light, the operating unit 32a is turned on (green) for cooling, and it is displayed whether the air conditioner 1 is powered on and is in an air conditioning operation of heating or cooling.

Further, as will be described below, the display control unit 17c causes the LEDs 3 and the LEDs 3 to operate according to the total current Io (Io = Ic + α) obtained by adding the correction value α to the working current Ic of the compressor 5.
4, 5 is energized (ON) to emit light, the working current is 5A,
It is designed to display at 10A and 15A.

When Io <5A, the LED 3 is turned on.
When 5A <Io <10, the LED 4 is turned on. 10 <
At the time of Io, the LED 5 is turned on.

Therefore, according to the present embodiment, by looking at the current display portion 21 on the front surface of the indoor unit 2, the current used current Io of the air conditioner 1 and its transition can be visually recognized easily and in real time. .

The working current Io displayed on the current display section 21 is the working current Ic of the compressor 5 on the outdoor unit 4 side, and a correction value α based on the number of revolutions of the indoor fan 7 per unit time. Since it is added as the used current on the 2 side, the used current of the entire air conditioner 1 can be displayed with high accuracy. That is, the current display unit 21
Can accurately and directly display the current used by the air conditioner 1.

As another method of displaying the used current of the air conditioner 1, the current display unit 21 is constituted by, for example, an LCD (liquid crystal display) panel, and the used current of the air conditioner 1 is digitally displayed as numbers. It is also possible to further improve the visibility and the service support function by also using the numbers and alphabets indicating the contents of abnormality or failure. In addition, the current display unit 21 is configured by an LCD array, and, for example, “currently 1
It may be displayed in Japanese characters such as "indicated by 0A" or the like, and may also be used as a display unit for displaying the contents of abnormality / fault as in the case of digital numeral display. Further, an analog display type current detector is electrically connected on the upstream side of the shunting portion for dividing the indoor and outdoor units 2 and 4 on the power supply line, and this analog type current detector is used as the current display portion 21. It may be provided in the indoor unit 2.

[0031]

As described above, according to each of the first to fourth aspects of the invention, the correction value based on the rotation speed per unit time of the indoor fan is added to the current used in the compressor of the outdoor unit. Since the used current is displayed on the current display of the indoor unit after correction such as addition as the used current on the unit side, the power consumption status of the entire air conditioner can be displayed with high accuracy on the indoor unit. it can.

According to the invention of claim 4, as the correction value in each of the inventions of claim 1 or 2, the maximum current value in the use range of the indoor fan is used as a fixed correction value. With, it is possible to make a display similar to the actual power consumption.

According to the invention of claim 5, a current detection circuit is provided on the power supply line common to the indoor and outdoor units, and the current value detected by this current detection circuit is displayed on the display section of the indoor unit. Since the value is already the sum of the currents used by the indoor and outdoor units respectively, it does not need to be corrected. Therefore, the power consumption status of the entire air conditioner can be accurately displayed on the indoor unit without correcting the current detected by the current detection circuit.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration of a main part of an embodiment of an air conditioner according to the present invention.

FIG. 2 is an overall configuration diagram of an embodiment of the present invention having a main part shown in FIG.

FIG. 3 is a perspective view of an indoor unit and a remote controller shown in FIG.

FIG. 4 is a perspective view of the outdoor unit shown in FIG.

5 is a partially enlarged view of the current display portion shown in FIG. 3 and its peripheral portion.

FIG. 6 is a diagram showing a correspondence relationship between the current display section shown in FIG. 3 and LEDs.

[Explanation of symbols]

 1 air conditioner 2 indoor unit 3 remote control 4 outdoor unit 5 compressor 6 four-way valve 7 indoor fan 8 indoor heat exchanger 9 expansion valve 10 outdoor fan 11 outdoor heat exchanger 12 refrigerant piping 13 drive circuit 14, 16 serial communication circuit 15 outdoor Controller 17 Indoor controller 17a CPU 17b Correction unit 17c Display control unit 21 Current display unit 29 Current display means 32 Display bar LEDs 1 to 5 Light emitting diodes 1 to 5

Claims (5)

[Claims] 1. An air conditioner comprising: an indoor unit containing at least an indoor heat exchanger and an indoor fan; and an outdoor unit containing at least a compressor, a four-way valve, an expansion valve, an outdoor heat exchanger, and an outdoor fan. In the air conditioner, an air conditioner is provided, which detects a current used in the outdoor unit, corrects the detected current with a predetermined correction value, and displays the current on a display unit of the indoor unit. . 2. The current display means includes a current detection circuit for detecting a current used in the compressor, a transmission section for transmitting current value data detected by the current detection circuit to a communication section of the indoor unit, and the indoor section. The correction unit for correcting the current value data received by the communication unit of the unit with a predetermined correction value, and the display unit for displaying the current value corrected by the correction unit. Air conditioner. 3. The air conditioner according to claim 1, wherein the correction unit is configured to correct the value of the current used from the outdoor unit by a correction value based on the operating frequency of the motor that drives the indoor fan. Machine. 4. The air conditioner according to claim 1, wherein the correction unit is configured to use the maximum current value in the use range of the indoor fan as a fixed correction value. 5. An air conditioner having an indoor unit containing at least an indoor heat exchanger and an indoor fan, and an outdoor unit containing at least a compressor, a four-way valve, an expansion valve, an outdoor heat exchanger, and an outdoor fan. In the air conditioner, the air conditioner is provided with a current display means for displaying the used current detected by the current detection circuit provided on the power supply line common to the indoor and outdoor units on the display unit of the indoor unit. .