JP3019721B2 - 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 an air conditioner.

[0002]

2. Description of the Related Art Conventionally, CFC has been used as a refrigerant for air conditioners.
A variety of refrigerating machine oils, such as mineral oil having high compatibility with CFC-based or HCFC-based refrigerants, are used as refrigerating machine oils for compressors.
However, these refrigerants will be completely eliminated in the near future due to the problem of destruction of the ozone layer.

[0003] In recent years, HFC-based single or mixed refrigerants have been considered as alternatives to these refrigerants, and glycol compounds, ester compounds, and the like have been proposed as compressor refrigerating machine oil (US Pat. No. 4,755,316). All of them aim to completely dissolve the HFC-based refrigerant and the refrigerating machine oil, thereby ensuring oil return.

FIG. 5 is a cross-sectional view of an air conditioner using the HCFC 22, wherein 15 is an air conditioner body, 16 is a compressor, and 17 is a compressor.
Is an evaporator, 18 is a condenser, 19 is a throttle device, 20 is a blower, 21 is a water tray for storing condensed water, 22 is a drain port,
23 is a drainage tank, 24 is a suction grill, and 25 is an outlet. The refrigerant compressed by the compressor 16 is discharged to the condenser 18. At this time, the refrigerating machine oil used for lubrication of the compressor 16 and the like is slightly discharged together with the refrigerant. However, since the compatibility with the refrigerant is very high, the condenser 1
8, return to the compressor 16 through the expansion device 19 and the evaporator 17.

[0005]

However, refrigerating machine oils of glycol compounds or ester compounds have insufficient abrasion resistance and low electrical resistivity as compared with conventional mineral oils. In addition, it has high hygroscopicity, and there are many issues in production such as moisture management in the assembly of air conditioners as well as moisture management of compressor components and finished products. There were problems such as accelerating mechanical wear of the machine, and clogging of the expansion device by these impurities to cause poor cooling.

The present invention solves the above-mentioned problems, and uses a mineral oil or synthetic oil which is not completely compatible with a refrigerant but has excellent electric insulation and hygroscopicity as a refrigerating machine oil. By configuring a refrigeration system in which the discharged refrigeration oil returns to the compressor without stagnation during the refrigeration cycle, a highly reliable air conditioner can be realized.

[0007] In order to solve the above-mentioned problems, the present invention comprises a compressor, an evaporator, a condenser, a throttle device and a blower, wherein a single or mixed HFC-based refrigerant is used as a refrigerant, Using a refrigerating machine oil having low compatibility with the refrigerant for the oil, using a horizontal type as the compressor, the evaporator and
A condenser is provided above the compressor, and refrigeration oil stops in the middle of the discharge pipe and the suction pipe directly connected to the horizontal compressor.
A spiral pipe is used to return to the compressor without stagnation .

The present invention also provides a compressor, an evaporator, a condenser,
It has a throttling device and a blower, uses a single or mixed HFC-based refrigerant as a refrigerant, uses a refrigerator oil having low compatibility with the refrigerant as a refrigerator oil of the compressor, and uses a horizontal type as the compressor. Used, the evaporator and the condenser of the compressor
Discharge installed above and directly connected to the horizontal compressor
Compressor without stagnation of refrigeration oil in the middle of pipes and suction pipes
A horizontal wave type pipe is used so as to return to FIG.

[0009]

The operation of the above means is as follows.

[0010] The present invention has a compressor, an evaporator, a condenser, a throttle device, and a blower, uses a single or mixed HFC-based refrigerant as a refrigerant, and is compatible with refrigerant in the refrigerating machine oil of the compressor. Using a low refrigerating machine oil, using a horizontal type as the compressor, by using a spiral pipe as a discharge pipe, suction pipe directly connected to the horizontal type compressor,
The vibration of the compressor can be absorbed, and the refrigeration oil returns to the compressor without stagnation in the middle of the discharge and suction pipes.

[0011] Furthermore, a compressor, an evaporator, a condenser, a throttle device, and a blower are provided, and a single or mixed HFC-based refrigerant is used as a refrigerant, and the refrigerant oil of the compressor has compatibility with the refrigerant. Using low refrigerating machine oil, using a horizontal type as the compressor, a discharge pipe directly connected to the horizontal type compressor, by using a horizontal wave type pipe as a suction pipe,
Vibration of the compressor can be absorbed, and refrigeration oil returns to the compressor without stagnation in the middle of the discharge and suction pipes.

[0012]

1 and 2 show a first embodiment of the present invention.
It is explained together with. FIG. 1 is a cross-sectional view of an air conditioner, and FIG. 2 is a side view of a compressor and piping connected thereto. In FIG. 1, an air conditioner main body 1 includes a horizontal compressor 2, an evaporator 3, a condenser 4, a throttle device 5, and a blower 6 constituting a refrigeration cycle. The condenser 3 and the evaporator 4 are provided above. Below the evaporator 4, there is a water receiving tray 7 for receiving condensed water. The condensed water passes through a drain port and accumulates in a drain tank 8. In addition, air is sucked from the intake grill 9 and the evaporator 3 and the condenser 4
Through the outlet 10. The conventional refrigerant CFC12 is used as the refrigerating machine oil of the horizontal compressor 2.
Alternatively, a mineral oil that has been used in HCFC22 is used. Numeral 11 denotes a discharge pipe which comes out of the horizontal compressor 2 provided inside the air conditioner body 1 and has a spiral pipe for absorbing vibration and preventing stagnation of refrigerating machine oil.
Is a suction pipe entering the horizontal compressor 2 and has a spiral pipe like the discharge pipe. Thereby, the refrigerating machine oil does not stagnate in the middle of the discharge pipe and the suction pipe, and in particular, the refrigerating machine oil reliably returns from the evaporator 3 to the horizontal compressor 2.

Next, a second embodiment will be described with reference to FIGS. FIG. 3 is a cross-sectional view of the air conditioner, and FIG. 4 is a side view of the compressor and piping connected thereto. In FIG. 3, a horizontal compressor 2 is provided inside the air conditioner main body 1. A discharge pipe 13 exiting from the horizontal compressor 2 is provided to absorb vibration and prevent stagnation of refrigerating machine oil. A horizontal pipe is provided, and 14 is a suction pipe which enters the horizontal compressor 2 and has a corrugated pipe like the discharge pipe. Thereby, the refrigerating machine oil does not stagnate in the middle of the discharge suction pipe, and in particular, the refrigerating machine oil surely returns to the horizontal compressor 2 from the evaporator 3. The refrigerating machine oil is the same as in the first embodiment.

[0014]

As can be seen from the above description, the present invention has a compressor, an evaporator, a condenser, a throttle device, and a blower, and uses a single or mixed HFC-based refrigerant as a refrigerant. Low compatibility with refrigerant in refrigeration oil, but CFC1
2 or HCFC22, a mineral oil that is more abrasion-resistant, more electrically insulating and less hygroscopic than the glycol compound or ester compound refrigerator oil that is highly compatible with HFC-based refrigerants. The horizontal type is used as the compressor, and the vibration transmission of the compressor can be absorbed as the discharge and suction pipes directly connected to the horizontal type compressor.
By using the helical pipe, the refrigerating machine oil does not stagnate in the middle of the discharge and suction pipes and reliably returns to the horizontal compressor. By configuring such a system, it is possible to solve problems such as moisture management in the manufacturing process, and not only can the same manufacturing equipment as in the past be used, but also the reliability of the system can be improved. In addition, this time, the effect in the mineral oil system is described, but the same effect is also obtained in the synthetic oil system having low compatibility with the HFC-based refrigerant.

Further, the compressor has a compressor, an evaporator, a condenser, a throttle device, and a blower, and uses a single or mixed HFC-based refrigerant as a refrigerant. Uses a mineral oil that is low but has a good track record with CFC12 or HCFC22, and has high compatibility with HFC-based refrigerants. By using a horizontal type as the compressor, and using a horizontal wave type pipe capable of absorbing vibration transmission of the compressor as a discharge and suction pipe directly connected to the horizontal type compressor, a discharge and suction pipe is provided. Refrigerator oil does not stagnate in the middle of the process and returns to the compressor without fail. By configuring such a system, it is possible to solve problems such as moisture management in the manufacturing process,
Further, not only the same manufacturing equipment as in the past can be used, but also the reliability of the system can be improved. In addition, this time, the effect in the mineral oil system is described, but the same effect is also obtained in the synthetic oil system having low compatibility with the HFC-based refrigerant.

[Brief description of the drawings]

FIG. 1 is a sectional view of an air conditioner according to a first embodiment of the present invention.

FIG. 2 is a side view of a compressor and piping according to the first embodiment of the present invention.

FIG. 3 is a sectional view of an air conditioner according to a second embodiment of the present invention.

FIG. 4 is a side view of a compressor and piping according to a second embodiment of the present invention.

FIG. 5 is a sectional view of a conventional example.

[Explanation of symbols]

 2 Horizontal compressor 3 Evaporator 4 Condenser 5 Throttle device 6 Blower 11 Spiral discharge pipe 12 Spiral suction pipe 13 Wavy discharge pipe 14 Wavy suction pipe

Continuation of the front page (56) References JP-A-5-157379 (JP, A) JP-A-62-192188 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25B 1 / 00 F25B 13/00 F25B 41/00

Claims (2)

(57) [Claims] 1. A compressor having a compressor, an evaporator, a condenser, a throttle device, and a blower, wherein a single or mixed HFC-based refrigerant is used as a refrigerant, and a refrigerant oil of the compressor has compatibility with the refrigerant. Using low refrigerating machine oil, using a horizontal type as the compressor, providing the evaporator and the condenser above the compressor,
Of the discharge pipe and the suction pipe directly connected to the horizontal compressor
Air conditioner using the refrigerating machine oil is found <br/> linear pipe to return to without compressor to stagnate in the middle. 2. It has a compressor, an evaporator, a condenser, a throttle device, and a blower, and uses a single or mixed HFC-based refrigerant as a refrigerant, and the refrigerant oil of the compressor has compatibility with the refrigerant. Using low refrigerating machine oil, using a horizontal type as the compressor, providing the evaporator and the condenser above the compressor,
Of the discharge pipe and the suction pipe directly connected to the horizontal compressor
An air conditioner that uses a transverse wave type pipe so that refrigeration oil returns to the compressor without stagnation on the way .