JP3349178B2 - Separate type air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separation type air conditioner.

[0002]

2. Description of the Related Art A system diagram of a conventional separation type air conditioner is shown in FIG.
Is shown in The outdoor unit 1 includes a compressor 11, an outdoor heat exchanger 12, an outdoor fan 13, a throttle 14, etc., pre-fills a refrigerant in a refrigerant system thereof, and a gate valve 3 mounted on a pair of connection ends of the refrigerant system. Shipped with 4 closed. The indoor unit 2 includes an indoor heat exchanger 21, an indoor fan 22, and the like.

The outdoor unit 1 and the indoor unit 2 are installed at predetermined positions, respectively, and the ends of a pair of connecting refrigerant pipes 5 and 6 are connected to gate valves 3 and 4 via flare nuts, and then air and refrigerant are replaced. Air purging operation is performed.

In this air purging operation, one gate valve, for example, 4 is opened, and the other gate valve 3 is connected to a connecting refrigerant pipe.
Slightly loosen the flare nut that fastens 5. Then, the refrigerant enclosed in the refrigerant system connected refrigerant pipes 6 of the outdoor unit 1, the indoor heat exchanger 21, flows into the connection refrigerant pipe 5
Then, the air existing inside these is released into the atmosphere from the clearance of the flare nut that has been loosened . When the predetermined time has been to all air discharge elapsed, the completely engaged flare nut is loosened, and air purge operation is completed by opening the sluice valve 3.

[0005]

In the above-mentioned separation type air conditioner, the refrigerant gas is released into the atmosphere together with the air during the air purging operation, but the amount of the released refrigerant is not constant. The machine is operated with insufficient refrigerant,
There was a risk that its performance would be reduced.

Further, in order to prevent the refrigerant from being released into the atmosphere as much as possible, the air purging operation is monitored during the operation, and a person for quickly fastening the flare nut at the end of discharging the air is required. There is a problem that the cost increases.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the gist of the first invention is to provide a refrigerant system for an outdoor unit in which a refrigerant is sealed in advance. In the separation type air conditioner in which the refrigerant system of the indoor unit is connected to the pair of connection ends via a pair of connection refrigerant pipes, at least one of the connection refrigerants of the gate valves respectively attached to the pair of connection ends. Installed on the piping side
A gas discharger has, to open and close the gas discharge port of the gas discharger
Driving means for driving the valve element
An operation section that outputs an purge command and the air purge
Setting means for setting the time;
Start counting in response to a reset command, and set the above setting means
Timer that counts out when the specified time has elapsed
And a built-in timer, and an air purge finger
Command is output to the above-mentioned drive means and the gas discharge port
Open the above timer when the timer counts out
A separate type air conditioner is provided with a controller which outputs to the means and closes the gas discharge port .

[0008] The gist of the second invention is that the refrigerant system of the indoor unit is connected to a pair of connection ends of the refrigerant system of the outdoor unit in which the refrigerant is previously sealed through a pair of connection refrigerant pipes. In the separation type air conditioner, at least one of the gate valves mounted on the pair of connection ends, respectively.
A gas discharger provided on the connection refrigerant pipe side,
Driver that drives the valve that opens and closes the gas discharge port of the gas discharger
Step and output air purge command by operating
The operation unit and the concentration of the refrigerant gas in the vicinity of the gas discharge port are detected.
The gas concentration sensor to be notified and the air purge finger
Command is output to the drive means and the gas discharge
Open the outlet and check the gas detected by the gas concentration sensor.
Output to the above-mentioned drive means when the gas concentration exceeds a predetermined value.
And a controller for closing the gas discharge port .

[0009]

According to the first aspect of the present invention, the operation unit is operated.
And the gas ejector valve is automatically driven
Is air purge by gas discharge port opens started, the valve body of the gas dischargers is automatically driven gas discharge port is closed when between setting time has <br/> elapsed.

In the second invention, the operation unit is operated.
And the gas ejector valve is automatically driven
The gas outlet opens and air purge starts, and the gas outlet
When the concentration of the refrigerant gas in the vicinity of exceeds a predetermined value, the valve body of the gas dischargers is automatically driven gas discharge port is closed.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention is shown in FIGS. As shown in FIG. 1, a gas discharger 60 is mounted on the upstream side of one gate valve 3, that is, on the side of the connection refrigerant pipe 5. Note that this gas discharger 60 can be integrated with the gate valve 3.

As shown in FIG. 2, the gas ejector 60 has a main body.
61, a gas discharge port 62 formed in the main body 61, and a main body 61
And a valve body 63 that moves up and down to open and close the gas discharge port 62. The motor 64 for driving the valve body 63 is controlled by the controller 67.

[0013] The controller 67 incorporates a timer (not shown), the timer starts counting when the signal from the operation unit 68 is inputted, the count A window Tosuru when elapsed time set by the setting means 69 It has become. The set time is a time required for air purging corresponding to the volume of the refrigerant system including the indoor heat exchanger 21 of the indoor unit 2 and the pair of connected refrigerant pipes 5 and 6.

Next, the air purge operation will be described. After the outdoor unit 1 and the indoor unit 2 are connected via the pair of refrigerant connection pipes 5 and 6, one gate valve 4 is opened. Therefore, when the operation unit 68 is operated, the motor 64 is driven based on a command from the controller 67, and the valve body 63 moves upward to open the gas discharge port 62.

Then, the refrigerant sealed in the refrigerant system of the outdoor unit 1 enters the refrigerant system of the indoor unit 2 via the gate valve 4 and the connecting refrigerant pipe 6, and exists in the refrigerant system of the indoor unit 2. The air passes through the refrigerant connection pipe 5
The gas enters the gas outlet 60 and is released to the atmosphere through the gas outlet 62.

When the air in the indoor unit 2 and the air in the pair of connecting refrigerant pipes 5 and 6 are replaced with the refrigerant gas by the lapse of the time set by the setting means 69, a command from the controller 67 is issued. , The valve body 63 moves downward to close the gas discharge port 62.

A second embodiment of the present invention is shown in FIG. In the second embodiment, a gas concentration sensor 66 for detecting the concentration of the refrigerant gas is provided near the gas discharge port 62 in the gas discharger 60.

During the air purge operation, when the concentration of the refrigerant gas detected by the sensor 66 becomes higher than a predetermined value,
The motor 64 is driven by a command from the controller 67 receiving the signal from this, the valve body 63 descends and the gas discharge port 62
Is closed. Other configurations and operations are the same as those of the first embodiment shown in FIGS. 1 and 2, and corresponding members are denoted by the same reference numerals.

[0019]

According to the first aspect of the present invention, a pair of connection ends are provided.
Connection refrigerant for at least one of the installed gate valves
A gas ejector provided on the piping side and the gas ejector
Drive means for driving a valve element for opening and closing the discharge port,
Operation section that outputs an air purge command by
Setting means for setting the time required for the purge
Start counting in response to the air purge command.
Count out when the time set in the column has elapsed
Built-in timer and timer, air purge command from operation unit
Is output to the driving means when the
Output to the driving means when the timer counts out.
Operation with a controller that closes the gas outlet
Operate the section to automatically activate the gas discharge valve
Air purge the start of gas discharge port is opened by Rukoto
Is, the valve body of the gas dischargers is automatically driven gas discharge port is closed when the time set has elapsed. Therefore, at the time of air purging, it is possible to reliably prevent a large amount of refrigerant from being released, and it is not necessary to have a worker for monitoring and operating the air purge, so that the operation cost can be reduced.

In the second invention, the pair of connecting ends are
Connection refrigerant distribution of at least one of the gate valves respectively mounted
Gas discharger provided on the tube side and gas of this gas discharger
Driving means for driving a valve element for opening and closing the discharge port, and operating
Operation unit that outputs an air purge command by
A gas concentration sensor that detects the concentration of refrigerant gas near the outlet
Drives when an air purge command is input from the operation unit
Means to open the gas discharge port, and
When the detected gas concentration exceeds a predetermined value,
A controller that outputs to the driving means and closes the gas discharge port
When operating the operation unit, the valve of the gas ejector automatically
The gas outlet is opened by the dynamic drive and the air
When the concentration of the refrigerant gas near the gas discharge port becomes equal to or higher than a predetermined value, the valve of the gas discharger is automatically driven to close the gas discharge port. Therefore, this second
Also in the invention of the first aspect, it is possible not only to reliably prevent a large amount of refrigerant from being discharged during air purging, but also to reduce the operating cost since no worker is required for monitoring and operating the air purging.

[Brief description of the drawings]

FIG. 1 is a system diagram of a separation type air conditioner according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the gas ejector of the first embodiment.

FIG. 3 is a sectional view of a gas ejector according to a second embodiment of the present invention.

FIG. 4 is a system diagram of a conventional separation type air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outdoor unit 11 Compressor 12 Outdoor heat exchanger 14 Restrictor 2 Indoor unit 21 Indoor heat exchanger 5, 6 Connected refrigerant piping 3, 4 Gate valve 60 Gas discharger 62 Gas discharge port 63 Valve body 64 Motor 67 Controller 68 Operation part 69 Setting method

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-57-122264 (JP, A) JP-A-5-99539 (JP, A) Jpn. Field (Int.Cl. ⁷ , DB name) F25B 43/04 F25B 41/04

Claims (2)

(57) [Claims] 1. A separation type air conditioner in which a refrigerant system of an indoor unit is connected to a pair of connection ends of a refrigerant system of an outdoor unit in which a refrigerant is previously sealed through a pair of connection refrigerant pipes. A gas discharger provided on at least one of the connection refrigerant pipes of a gate valve attached to a connection end of the gas discharger, and a gas discharge opening of the gas discharger.
Drive means for driving the valve element, and air
An operation unit that outputs a purge command and when necessary for air purging
Setting means for setting the interval, and air purge from the operation unit
Starts counting in response to the command, and
A timer that counts out when the elapsed time has elapsed,
Built-in timer and air purge command from the operation unit
When it is input, it is output to the drive means to open the gas discharge port.
The driving means when the timer counts out.
And a controller for closing the gas discharge port by outputting the gas to the air conditioner. 2. A separation type air conditioner wherein a refrigerant system of an indoor unit is connected to a pair of connection ends of a refrigerant system of an outdoor unit in which a refrigerant is previously sealed through a pair of connection refrigerant pipes. Provided on at least one of the connection refrigerant pipe sides of the gate valve attached to each of the connection ends .
Open and close the gas outlet and the gas outlet of this gas outlet
Drive means for driving the valve element, and air
An operation unit that outputs a purge command, and the vicinity of the gas discharge port
A gas concentration sensor for detecting the concentration of
When the air purge command is input from the working section, the driving means
To open the gas outlet, and the gas concentration sensor
If the gas concentration detected by
To the drive means to close the gas outlet.
A separate type air conditioner characterized by having a controller .