JP3790069B2 - Air conditioner control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a display method of a display device provided in an outdoor unit of an air conditioner and various test modes.
[0002]
[Prior art]
Conventionally, there are air conditioner outdoor units that are provided with a vacuum evacuation switch to switch two-way valves and four-way valves, etc., and many switches and display devices that are used to switch various displays. It was.
[0003]
[Problems to be solved by the invention]
However, if a large number of switches corresponding to each type of display required for the outdoor unit are provided and used, it is convenient for air conditioner installation work and after-sales service, but after-sales service is rarely performed. For this reason, the installation of a large number of switches led to an increase in manufacturing costs and required cost reduction.
[0004]
[Means for Solving the Problems]
This invention pays attention to this point, and in order to solve the above-mentioned drawbacks, an outdoor unit including a compressor, a four-way valve, an outdoor heat exchanger, and the like, and an indoor unit including an indoor heat exchanger, a fan, and the like are connected by a refrigerant pipe. The refrigeration circuit is formed, and the outdoor unit includes at least one display device, a mode switch for switching the display of the display device for each mode, and a changeover switch for switching the display in the group in the mode. The apparatus displays a first test mode in an initial state, shifts to the second test mode when the first pressing time of the mode switch elapses for the first predetermined time, and changes to the second testing mode when the second predetermined time elapses. Changed to 3 test mode.
[0005]
The third test mode is a service mode in which various valve devices in the refrigeration circuit are switched and the refrigeration circuit is evacuated, and the display device displays the mode.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The test mode and the display on the display device 40 will be described with reference to the flowchart of FIG. 4. When no switch operation is performed, the 7-segment display device 40 is in the first test mode and displays “0”. If the altitude adjustment volume 43 is rotated at this time, the display changes from “0” to “5”, and the altitude of 200 m per number “1” is adjusted. (S1)
Next, when the mode switch 41 is continuously pressed for 5 seconds or more (S2), the display device 40 shifts from the first test mode to the burner-related mode (S3) which is the second test mode, and the display device 40 switches “P” and “4” for 1 second. Repeated lighting alternately (hereinafter such display form is expressed as “P4”). At this time, if the flow rate adjustment volume 44 is rotated clockwise, the numbers “P5”, “P6” and “P9” increase. On the contrary, if the flow rate adjusting volume 44 is rotated counterclockwise, the number decreases to “P0”, and each time the number changes by 1, the reference flow rate of the electromagnetic pump 34 increases or decreases by about 1% around “P4”. . (S7)
[0007]
Next, when the changeover switch 42 is pressed (S8), the display device 40 displays the voltage detected by the flame rod 38 in the range of "F0" to "F5" (S9). The input value of the microcomputer is displayed by appropriately dividing between 0 and 4.8 millivolts.
[0008]
Next, when the changeover switch 42 is pressed again (S10), the display device 40 displays the temperature of the temperature sensor 36 provided in the burner 29 in the range from "L0" to "L9" (S11), which is "L0". In this case, “L9” represents 300 ° C. or higher, and “L1” to “L8” appropriately divided intermediate temperatures.
[0009]
Next, if the changeover switch 42 is pressed again, the flow returns to S7 to correct the electromagnetic pump flow rate, and S6 to S12 are repeated as long as the changeover switch 42 is kept pressed.
When the mode switch 41 is pressed for 5 seconds or more and less than 15 seconds (S4) from the display of the burner-related mode (S3) as the second test mode, the display device 40 is in the first test mode. Returning to the altitude adjustment display (S1), when the mode switch 41 is kept pressed for 15 seconds or longer (S5), the display device 40 switches from the second test mode to the service mode display of “JO” which is the third test mode. At the same time, the four-way valve 13 and the two-way valve 17 are turned on so that the vacuuming operation can be performed. This service mode is easily canceled during the vacuuming operation due to an incorrect switch operation, etc., and the vacuuming operation is not performed again from the beginning. As described above, when entering once the service mode is intended to continue the service mode unless unplug the power cord 56 of the air conditioner.
[0010]
In this way, the minimum number of display devices 40, the test mode switch 41, and the changeover switch 42 can be used effectively by changing the pressing time of the switch, and many displays can be performed, and the manufacturing cost can be kept low. It is something that can be done.
Further, displaying the third test mode in the service mode is convenient because the service mode can be visually confirmed.
In addition, once the service mode is entered, the service mode cannot be canceled except by plugging / unplugging the power cord, so that a reliable vacuuming operation can be performed.
[0011]
【Example】
DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes an indoor unit of an air conditioner that is installed on an indoor wall or the like, and has a fin tube type indoor heat exchanger 2 and a cross flow type inside. An indoor fan 3, an indoor motor 4 that rotates the indoor fan 3, an indoor controller 4 that is connected to the indoor motor 4, the display lamp 5, the receiver 7 of the wireless remote controller 6, and the like and that controls the operation of the indoor unit 1, The temperature of the indoor air is adjusted by sucking the indoor air and exchanging heat to return it to the room.
[0012]
Reference numeral 9 denotes an outdoor unit that is installed outdoors and is connected to the indoor unit 1 through the wall and the like by a connecting pipe 10 and a connecting wire 11. Inside, a four-way valve 13 and a fin for switching between the compressor 12 and the refrigeration circuit are provided. A tube-type outdoor heat exchanger 14, a decompression device 15 such as a capillary tube, a refrigerant heating device 16 and the like are provided, and the compressor 12, the four-way valve 13, the outdoor heat exchanger 14, the decompression device 15, and the indoor heat exchanger 2 are provided. The refrigerant circuit is successively connected to form a refrigeration circuit, and a bypass circuit 18 including the refrigerant heating device 16 and the two-way valve 17 is formed in parallel with the outdoor heat exchanger 14 and the decompression device 15.
[0013]
The display lamp 5 includes an operation lamp 19 that is turned on during operation, a fuel supply lamp 20 that indicates that the fuel has run out by turning on and flashing, a timer lamp 21 that is turned on during timer operation, and the like, and visually confirming each state. It is something to be informed.
[0014]
The wireless remote controller 6 starts operation with the first press and stops with the second press, the temperature switch 22 which can be moved up and down with two buttons, and the temperature / time setting switch 23 with the two buttons, and the cooling / heating / dehumidifying operation. And a timer switch 25 that can stop or operate the air conditioner after the time set by the temperature / time setting switch 23.
[0015]
The four-way valve 13 is for switching the refrigeration circuit between the cooling operation at the ON time and the heating operation at the OFF time. When switching from the cooling time to the heating, the one that the two-way valve 17 was closed is opened. At the same time, the four-way valve 13 is switched and the check valve 26 provided between the outdoor heat exchanger 14 and the pressure reducing device 15 acts to prevent the refrigerant from flowing to the outdoor heat exchanger 14 and to the bypass circuit 18. The refrigerant is heated by the combustion of kerosene by the refrigerant heating device 16 provided in the bypass circuit 18, and the heating capacity that tends to be insufficient can be sufficiently secured.
[0016]
The refrigerant heating device 16 includes a heat exchanger 27 for heating through which the refrigerant of the bypass circuit 18 passes, a combustion chamber 28, a burner 29, and a combustion fan 30, and the heat exchanger for heating by combustion of the burner 29 during heating operation. The refrigerant | coolant in 27 is heated and a high temperature refrigerant | coolant is sent to the indoor unit 1. FIG.
The burner 29 includes a burner main body 29a formed by aluminum die casting and a burner head 29b for blowing out a flame made of stainless steel. A temperature of about 250 to 300 ° C. is maintained in the burner main body 29a during combustion. Is.
[0017]
31 is a leveler tank that pumps up kerosene stored in a kerosene tank (not shown) provided separately from the air conditioner, pumps it up by the upper pump 32, and temporarily stores it in the refrigerant heating device 16, and makes the oil level of the kerosene constant. A float switch 33 for maintaining and an electromagnetic pump 34 for supplying kerosene in the leveler tank 31 to the burner 29 are provided.
A heater 35 provided in the burner 29 is used to heat the burner 29 at the time of ignition to vaporize fuel kerosene, and is used to control the temperature of the burner 29 during normal combustion.
Reference numeral 36 denotes a temperature sensor for detecting the temperature of the burner 29, which detects the temperature of the surface of the burner main body 29a by a thermistor sensor or the like and generates a signal according to the temperature.
Reference numeral 37 denotes an electrode for generating a spark from the tip and igniting the burner 29. A frame rod 38 monitors the combustion state of the burner 29.
[0018]
Reference numeral 39 denotes an outdoor control device that includes an inverter device (not shown) for controlling the rotation of the compressor 12 and controls the entire outdoor unit 9. The indoor control device 8 of the indoor unit 1 and the communication wire 11 The signal is transmitted to and received from the indoor control device 8 and power is supplied from the indoor control device 8 to the outdoor control device 39 through the communication wire 11.
Reference numeral 40 denotes a 7-segment display device provided in the outdoor unit 9, which displays an error caused by the outdoor unit 9 side by a code number or displays various modes.
Reference numeral 41 denotes a mode switch which shifts to the next mode by continuous pressing, and the display on the display device 40 changes accordingly.
[0019]
Reference numeral 42 denotes a changeover switch for switching the display in the test mode group.
43 is a variable resistance type altitude adjustment volume, and the value of the display device 40 in the normal state changes due to the rotation of the volume. By setting the current altitude to be used, the reference rotation speed of the combustion fan 30 is changed. The burner 29 is adjusted so as to burn normally even in highlands such as mountainous areas.
Reference numeral 44 denotes a variable resistance type flow rate adjusting volume for adjusting the flow rate of the electromagnetic pump 34, which is used for adjusting the burner 29 or the like.
[0020]
An indoor temperature sensor 45 is provided at a suction port (not shown) or the like of the indoor unit 1 and measures the temperature of the sucked indoor air. An indoor heat exchange sensor 46 measures the temperature of the indoor heat exchanger 2.
47 is a discharge temperature sensor that is attached to the refrigerant pipe between the four-way valve 13 and the indoor heat exchanger 2 in the outdoor unit 9 and measures the temperature of the refrigerant.
A heating temperature sensor 48 is provided in the refrigerant pipe downstream of the refrigerant heating device 16 of the bypass circuit 18.
[0021]
Reference numeral 49 denotes an outside air temperature sensor provided at a suction port (not shown) of the outdoor unit 9, which measures the outdoor temperature.
A propeller-type outdoor fan 50 is rotated by an outdoor motor 51 and blows air to the outdoor heat exchanger 14.
A seismic device 52 detects vibrations such as earthquakes, and sends a signal to the outdoor control device 39 when vibrations exceeding a certain level occur.
[0022]
53 is a safety device of the compressor 12 for preventing the compressor 12 from being heated due to an overload or an overcurrent flowing to destroy the internal winding.
Reference numeral 54 denotes a safety thermo attached to the outer wall of the combustion chamber 28, which comprises a bimetallic switch and is turned off at about 120 ° C. and automatically returned (ON) at about 100 ° C.
A service port 55 is provided between the indoor heat exchanger 2 and the four-way valve 13 and performs evacuation and refrigerant injection in the refrigeration circuit.
56 is a power cord for supplying power to the indoor control device 8.
[0023]
Explaining the operation, since the two-way valve 17 is closed during the cooling operation, the refrigerant circulates in the direction indicated by the solid line arrow in FIG. The indoor heat exchanger 2 is cooled to a high temperature to cool the room.
During the heating operation, the two-way valve 17 is opened and the refrigerant circulates in the direction indicated by the broken line arrow. The heat generated by the refrigerant heated by the refrigerant heating device 16 of the bypass circuit 18 causes the indoor heat exchanger 2 to reach a high temperature. Since the heat of combustion of kerosene by the refrigerant heating device 16 is used as a heat source, a sufficient amount of heat can be secured even in a cold region where the outside air temperature is below freezing point.
[0024]
Next, the test mode and display on the display device 40 will be described with reference to the flowchart of FIG. 4. When no switch operation is performed, the 7-segment display device 40 is in the first test mode and displays “0”. At this time, if the altitude adjustment volume 43 is rotated, the display changes from “0” to “5”, and the altitude of 200 m per number “1” is adjusted. (S1)
[0025]
Next, when the mode switch 41 is continuously pressed for 5 seconds or more (S2), the display device 40 shifts from the first test mode to the burner-related mode (S3) which is the second test mode, and the display device 40 switches “P” and “4” for 1 second. Repeated lighting alternately (hereinafter such display form is expressed as “P4”). At this time, if the flow rate adjustment volume 44 is rotated clockwise, the numbers “P5”, “P6” and “P9” increase. On the contrary, if the flow rate adjusting volume 44 is rotated counterclockwise, the number decreases to “P0”, and each time the number changes by 1, the reference flow rate of the electromagnetic pump 34 increases or decreases by about 1% around “P4”. . (S7)
[0026]
Next, when the changeover switch 42 is pressed (S8), the display device 40 displays the voltage detected by the flame rod 38 in the range of "F0" to "F5" (S9). The input value of the microcomputer is displayed by appropriately dividing between 0 and 4.8 millivolts.
Next, when the changeover switch 42 is pressed again (S10), the display device 40 displays the temperature of the temperature sensor 36 provided in the burner 29 in the range from "L0" to "L9" (S11), which is "L0". In this case, “L9” represents 300 ° C. or higher, and “L1” to “L8” appropriately divided intermediate temperatures.
[0027]
Next, if the changeover switch 42 is pressed again, the flow returns to the electromagnetic pump flow rate correction of S7, and S6 to S12 are repeated as long as the changeover switch 42 is kept pressed.
When the mode switch 41 is pressed for 5 seconds or more and less than 15 seconds (S4) from the display of the burner-related mode (S3) as the second test mode, the display device 40 is in the first test mode. When returning to the altitude adjustment display (S1) and pressing the mode switch 41 for 15 seconds or longer (S5), the display device 40 is switched to the service mode display of “JO”, which is the second test mode, and vacuuming is performed. Since the four-way valve 13 and the two-way valve 17 are turned on as much as possible, the evacuation work is performed after a major repair work such as moving the air conditioner, repairing leaks in the refrigeration circuit, or replacing parts. This service mode can be canceled easily during the evacuation operation by switch operation, etc., so that this evacuation operation is not performed again from the beginning. If it gets to Bisumodo it is to continue the service mode unless unplug the power cord 56 of the air conditioner.
[0028]
In this way, the minimum number of display devices 40, the mode switch 41, and the changeover switch 42 can be effectively used by changing the pressing time of the switch so that many displays can be performed, and the manufacturing cost can be kept low. It can be done.
In addition, displaying the third test mode in the service mode is convenient because the service mode can be visually confirmed.
In addition, once the service mode is entered, the service mode cannot be canceled except by plugging / unplugging the power cord, so that a reliable vacuuming operation can be performed.
[0029]
【The invention's effect】
As described above, according to the present invention, it is possible to perform many displays by effectively using the minimum display device, the mode switch, and the changeover switch by changing the pressing time of the switch, and the manufacturing cost is also reduced. It can be kept low.
In addition, displaying the third test mode in the service mode is convenient because the service mode can be visually confirmed.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a refrigeration circuit according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram of the refrigerant heating device.
FIG. 3 is a system diagram of the control device.
FIG. 4 is a flowchart of the main part.
[Explanation of symbols]
1 indoor unit 9 outdoor unit 40 display device 41 mode switch 42 changeover switch

Claims (2)

An outdoor unit including a compressor, a four-way valve, an outdoor heat exchanger, and the like, and an indoor unit including an indoor heat exchanger and a fan are connected by a refrigerant pipe to form a refrigeration circuit, and at least one display device and the The outdoor unit is provided with a mode switch for switching the display of the display device for each mode and a switch for switching the display within the group in the mode, and the display device displays the first test mode in the initial state, and the mode An air conditioner characterized in that the switch pressing time shifts to the second test mode when a first predetermined time elapses, and the mode switch pressing time shifts to the third test mode after a second predetermined time elapses. Control device. The third test mode is a service mode in which various valve devices in the refrigeration circuit are switched and the refrigeration circuit is evacuated, and the display device displays the mode. The control apparatus of the air conditioner described.

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