JP2001324197A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform switching of single operation and simultaneous operation of each indoor machine 1 by an outdoor machine 9. SOLUTION: The single outdoor machine 9 having a compressor, a four-way valve, and an outdoor heat-exchanger, an outdoor heat-exchanger and the like is interconnected in parallel with a plurality of the indoor machines 1 having indoor heat exchangers, fans, etc., by refrigerant piping to form a refrigerating circuit. A valve device 21 to switch single operation and simultaneous operation of each indoor machine 1 is situated in the outdoor machine 9. A trial operation switch 44 to switch single operation and simultaneous operation of each indoor machine 1 through operation of the valve device 21 and a display device 42 to display a state of test operation are mounted on the outdoor machine 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a test switch for a multi-type air conditioner having a plurality of indoor units for one outdoor unit.

[0002]

2. Description of the Related Art Conventionally, in an air conditioner of this type, in a trial operation after installation or in after-sales service, an operator operates a test operation switch provided in each indoor unit in each room where a plurality of indoor units are installed. Was conducting a trial run.

[0003]

In such a test operation, a worker turns around each indoor unit to perform an independent operation or a simultaneous operation, and then checks the operation state of each indoor unit and the outdoor unit to perform a test operation. The operator had to move between each indoor unit and the outdoor unit, which was very inconvenient.

[0004]

The present invention focuses on this point, and solves the above-mentioned drawbacks. In order to solve the above-mentioned drawbacks, the present invention relates to an outdoor unit having a compressor, a four-way valve, an outdoor heat exchanger, and the like; A plurality of indoor units equipped with fans and the like are connected in parallel by refrigerant pipes to form a refrigeration circuit, and a valve device for switching between independent operation and simultaneous operation of each of the indoor units is provided in the outdoor unit, and the valve device is operated. The outdoor unit is provided with a test operation switch for switching between independent operation and simultaneous operation of each indoor unit and a display device for displaying a state of the test operation.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Operation of the indoor unit 1 which is connected to the indoor heat exchanger 2, the indoor fan 3 of the cross flow type, the indoor motor 4 for rotating the indoor fan 3, the indoor motor 4, the display lamp 5, the receiving device 7 of the wireless remote controller 6, and the like. An indoor controller 8 is provided for controlling the temperature of the indoor air by sucking indoor air and exchanging heat to return the indoor air.

Reference numeral 9 denotes an outdoor unit which is installed outdoors and is connected to the indoor unit 1 through a wall or the like by a connecting pipe 10 and a connecting wire 11, and has a four-way valve for switching between a compressor 12 and a refrigeration circuit inside. 13, a fin tube type outdoor heat exchanger 14, a pressure reducing device 15 such as a capillary tube, a refrigerant heating device 16, etc., and the compressor 12, the four-way valve 13, the outdoor heat exchanger 14, the pressure reducing device 15, the indoor heat A refrigeration circuit is formed by sequentially connecting the exchangers 2 with refrigerant pipes, and a bypass circuit 18 having the refrigerant heating device 16 and the two-way valve 17 is formed in parallel with the outdoor heat exchanger 14 and the pressure reducing device 15. I have.

The four-way valve 13 of the outdoor unit 9 and the connecting pipe 10
are connected to each indoor unit 1 at a branch portion 19a provided between the indoor units 1. A branch portion 19b and two expansion valves 21a and 21b are similarly provided between the inlet portion 20 of the bypass circuit 18 and the communication pipe 10b, and the expansion valves 21a and 21b are provided.
The opening and closing of the opening and closing adjusts the amount of refrigerant flowing to each indoor unit 1 or reduces the pressure of the refrigerant. In the case of indoor operation of the indoor unit alone, the stopped expansion valve 21 is fully closed,
The operating expansion valve 21 is opened at an appropriate opening to evaporate the refrigerant.

In the case of simultaneous operation, both expansion valves 21a
-The refrigerant flows into each indoor unit by opening 21b.
The display lamp 5 includes an operation lamp 22 which is turned on during operation and a refueling lamp 23 which indicates running out of fuel by turning on or blinking.
And a timer lamp 24 and the like, which are turned on during the timer operation, to visually inform the user of each state.

The temperature of the wireless remote controller 6 can be raised and lowered by the operation switch 25 and the two buttons which start the operation by the first press and enter the stop operation by the second press.
A time setting switch 26, a course selection switch 27 for selecting an operation course such as a cooling / heating / dehumidifying operation,
A timer switch 28 that can stop and operate the air conditioner after the time set by the time setting switch 26
It has.

The four-way valve 13 is used for cooling operation when ON and for OF operation.
This is for switching the refrigeration circuit of the heating operation at the time of F. When switching from the cooling operation to the heating operation, the two-way valve 17 is closed and the four-way valve 13 is switched to switch the outdoor heat. By the action of the check valve 29 provided between the exchanger 14 and the pressure reducing device 15, the refrigerant does not go to the outdoor heat exchanger 14 and the refrigerant bypasses the bypass circuit 18 and is provided in the bypass circuit 18. The refrigerant is heated by the combustion of the kerosene by the refrigerant heating device 16, and the insufficient heating capacity can be sufficiently secured.

The refrigerant heating device 16 includes a heating heat exchanger 30 through which the refrigerant in the bypass circuit 18 passes, and the combustion chamber 3.
1, a burner 32, and a combustion fan 33, which heat the refrigerant in the heating heat exchanger 30 by the combustion of the burner 32 during the heating operation, and send a high-temperature refrigerant to the indoor unit 1. The burner 32 includes a burner main body 32a formed by aluminum die casting, a burner head 32b that blows out a flame made of stainless steel, and the like, and a temperature of about 250 to 300 ° C. is maintained by the burner main body 32a during combustion. Things.

Reference numeral 34 denotes a leveler tank which pumps kerosene stored in a kerosene tank (not shown) provided separately from the air conditioner by a pump 35 and temporarily stores the kerosene in the refrigerant heating device 16. It is provided with a float switch 36 for keeping it constant and an electromagnetic pump 37 for supplying kerosene in the leveler tank 34 to the burner 32. Numeral 38 denotes a heater provided in the burner 32.
2 is used to vaporize the fuel kerosene by heating, and is used to control the temperature of the burner 32 during normal combustion.

A temperature sensor 39 detects the temperature of the burner 32. The temperature sensor 39 detects the temperature of the burner 32a by a thermistor sensor or the like.
It detects the temperature of the surface and issues a signal according to the temperature. 40 generates a spark from the tip and burner 32
Electrode to ignite. Reference numeral 41 denotes a frame rod for monitoring the combustion state of the burner 32.

The outdoor unit 9 includes an inverter device (not shown) for controlling the rotation of the compressor 12 therein.
An outdoor control device that performs overall control. The outdoor control device is connected to the indoor control device 8 of the indoor unit 1 by a communication wire 11, exchanges signals with the indoor control device 8, and controls the indoor control device 8 through the communication wire 11. Is supplied to the outdoor control device 42 from the outside.

Reference numeral 43 denotes a seven-segment display device provided in the outdoor unit 9, and the display is switched when the test operation switch 44 is pressed to display the operation status of each indoor unit 1 in the independent operation or the simultaneous operation. When the test run switch 44 is depressed, the test run mode is sequentially shifted, and from the stop state, the test run mode is switched to 1 mode.
In the second pressing, the expansion valve 21a is opened, one of the indoor units 1a starts an independent operation, and the display device 43 displays "1". In the second pressing, the expansion valve 21b opens and the expansion valve 21a closes, and the other indoor unit 1b starts an independent operation, and the display device 43 displays "2". In the third pressing, both the expansion valves 21a and 21b are opened to perform simultaneous operation, and the display device 43 displays "3". Then, both indoor units 1a and 1b and outdoor unit 9 are stopped by the fourth pressing, and the display device 43 is turned off.

Reference numeral 45 denotes a suction port (not shown) of the indoor unit 1.
An indoor temperature sensor that measures the temperature of the drawn indoor air. An indoor heat exchange sensor 46 measures the temperature of the indoor heat exchanger 2. 47 is a four-way valve 1 in the outdoor unit 9
A discharge temperature sensor attached to the refrigerant pipe between the heat exchanger 3 and the indoor heat exchanger 2 for measuring the temperature of the refrigerant; Reference numeral 48 denotes a heating temperature sensor provided in a refrigerant pipe of the bypass circuit 18 downstream of the refrigerant heating device 16.

Reference numeral 49 denotes a suction port of the outdoor unit 9 (not shown).
The outside air temperature sensor provided at the is used to measure the outdoor temperature. Reference numeral 50 denotes a propeller type outdoor fan which is rotated by the outdoor motor 51 and blows air to the outdoor heat exchanger 14. Reference numeral 52 denotes a seismic device that detects vibrations such as earthquakes and sends a signal to the outdoor control device 42 when a certain level or more of vibration is generated.

Reference numeral 53 denotes a safety device for the compressor 12, which prevents the internal winding from being broken due to the compressor 12 becoming hot due to an overload or an overcurrent flowing. Numeral 54 denotes a safety thermostat mounted on the outer wall of the combustion chamber 28, which comprises a bimetallic switch and has a temperature of about 120 ° C.
And automatically returns (ON) at about 100 ° C. 55 is a service port provided between the indoor heat exchanger 2 and the expansion valve 21 for evacuating the refrigeration circuit and injecting refrigerant. 56 is the indoor controller 8
Power cord to supply power to

The trial operation will be described with reference to the flowchart of FIG. 4. If the repair operation due to the installation or failure of the air conditioner is completed and the trial operation switch 44 in the outdoor unit 9 is pressed (S2), the expansion valve 21a is activated. When opened, the single operation of one indoor unit 1a starts, and the display device 43 displays "1" to inform that the single unit 1a is currently being operated alone.

Next, when the test operation switch 44 is pressed a second time in S4, the expansion valve 21b is opened and the expansion valve 21a is opened.
Is closed and the other indoor unit 1b is switched to the isolated operation,
The display device 43 displays "2" to notify that the indoor unit 1b is currently operating alone. Then S
When the test operation switch 44 is pressed for the third time at 6, the expansion valves 21a and 21b are opened, and the operation is switched to the simultaneous operation of the indoor units 1a and 1b. It informs that simultaneous operation of 1a and 1b is being performed.

Next, when the test operation switch 44 is pressed for the fourth time in S8, the expansion valves 21a and 21b are closed and the operation returns to S1 to stop the operation of the indoor units 1a and 1b and the outdoor unit 9, and the display device 23 is turned off. Turns off and stops displaying. Thus, the outdoor unit 9
In this case, the individual operation and the simultaneous operation of each of the indoor units 1a and 1b are switched and the operation state is displayed on the display device 43, so that the test operation after the air conditioner is installed or the after-service is completed is performed extremely quickly. Things that can do things.

In this embodiment, the simultaneous operation is performed after the independent operation of the indoor units 1a and 1b by pressing the test operation switch 44. However, the same operation may be performed after the simultaneous operation of the indoor units 1a and 1b. And the expansion valve 2
The same effect can be obtained even if 1a and 21b are replaced by two-way valves.

[0023]

As described above, according to the present invention, the test operation after the air conditioner is installed or after the service is completed can be performed extremely quickly.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a refrigeration circuit according to one 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]

 Reference Signs List 1 indoor unit 9 outdoor unit 21 expansion valve 43 display device 44 test run switch

Claims (1)

[Claims] 1. A refrigeration system in which a single outdoor unit having a compressor, a four-way valve, an outdoor heat exchanger and the like, and a plurality of indoor units having an indoor heat exchanger and a fan are connected in parallel by refrigerant piping. A circuit for forming a circuit, a valve device for switching the individual operation and the simultaneous operation of each indoor unit is provided in the outdoor unit, and a trial operation switch for operating the valve device to switch the individual operation and the simultaneous operation of each indoor unit and a state of the test operation. An air conditioner, characterized in that a display device for displaying is provided in an outdoor unit.