JPH0419409Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is provided in the refrigerant circuit of an air conditioner, and is attached to the suction side of the compressor to feed only gas phase refrigerant to the compressor. This paper relates to improvements to the accumulator.

[Conventional technology]

FIG. 6 shows a refrigerant circuit diagram of a conventional air conditioner shown in, for example, Japanese Utility Model Application Publication No. 58-071672. In the figure, 1 is a compressor, 2 is a four-way valve,
3 is an outdoor heat exchanger, 4 is a capillary tube for decompression, 5 is an indoor heat exchanger, and 6 is an accumulator, which are successively connected by refrigerant piping to constitute a heat pump type refrigerant circuit.

When the gas-liquid mixed refrigerant generated due to fluctuations in the heat exchange load by the indoor and outdoor heat exchangers 3 and 5 is fed through the four-way valve 2, the accumulator 6 uses liquid-phase refrigerant. The function is to guide only the gaseous refrigerant to the compressor 1 while leaving the refrigerant in the gas phase.

As mentioned above, the refrigerant that cannot be completely evaporated in the heat exchangers 3 and 5 and partially returns in the liquid phase is sucked into the compressor 1. It has the function of preventing damage to the compressor due to liquid compression, but due to the relationship between the capacity of the accumulator 6, the amount of refrigerant filled in the refrigerant circuit, and the operating conditions, the accumulator 6 may be filled with liquid phase refrigerant. , there was a risk that liquid phase refrigerant would be sucked into the compressor 1.

Therefore, as shown in FIG. 7, a plurality of liquid level detection pipes 10 are provided on the side surface of the accumulator 6.
This piping is connected to the liquid phase refrigerant 12 or the gas phase refrigerant 13.
The liquid refrigerant flow is determined by detecting the temperature difference, and the liquid level height of the liquid refrigerant stagnant in the main body of the accumulator 6 is detected to control the operating state and protect the compressor 1. It was effective to use it.

[Problem that the invention attempts to solve]

Since the conventional accumulator is constructed as described above, the force of the gas-liquid mixed refrigerant sucked in disturbs the liquid level of the liquid phase refrigerant staying in the accumulator, which changes the operating state. In some cases, the entire interior becomes bubbled and homing, causing liquid refrigerant to flow into the liquid level detection tube located higher than the actual liquid level, making it impossible to accurately detect the liquid level. It was hot.

This invention was made to solve the above-mentioned problems, and aims to provide a liquid level detection device that can accurately detect the amount of liquid phase refrigerant inside the accumulator.

[Means for solving problems]

The liquid level detection device for an accumulator according to this invention is provided with a partition plate that separates the inflow part of the liquid level detection piping provided on the side of the main body from the inside of the main body, and the inside of the main body is provided at the upper and lower parts of the main body. It is provided with an opening for communication.

[Effect]

The accumulator according to this invention detects the actual internal liquid level position without being affected by disturbance of the liquid phase refrigerant inside the main body by means of a partition plate provided at the inflow part of the liquid level detection piping.

[Example of idea]

An embodiment of this invention will be described below with reference to the drawings.

In the figures, parts that are the same as or equivalent to those in the prior art are given the same reference numerals and their explanations will be omitted.

The accumulator 6 vertically penetrates the upper wall surface of the outer shell 7, similar to the inlet pipe 8 whose end located inside the main body 6 is gently bent. The main body 6 includes an outlet pipe 9 whose end is bent into a U-shape.
A plurality of liquid level detection pipes 10 are provided in the vertical direction, penetrating the side surface of the outer shell 7 and projecting slightly into the main body 6.

Reference numeral 11 denotes a partition plate 11 that separates the openings in the main body 6 of these liquid level detection pipes 10 from the space inside the main body 6.
It has a substantially U-shaped cross section and is attached within the side wall of the outer shell 7. As shown in FIG. 2, this partition plate is in contact with the outer shell 7 on both sides and has openings at the upper and lower parts of the main body 6, respectively, and communicates with the space inside the main body 6.

In the accumulator 6 configured as described above, the inlet pipe 8 introduces the gas-liquid mixed refrigerant sent from the four-way valve 2 into the main body 6 through its tip discharge port 8a. A liquid phase refrigerant 12 is accumulated below and a vapor phase refrigerant 13 is accumulated above.

On the other hand, since the outlet pipe 9 is connected to the suction side of the compressor 1, the gas phase refrigerant 13 in the main body 6 is transferred to the compressor through the suction port 9a at the tip of the outlet pipe 9 due to the suction force of the compressor 1. I am guided by 1. The liquid phase refrigerant 12 and the gas phase refrigerant 13 in the accumulator 6 are connected to a liquid level detection pipe 1 provided on the side surface of the main body 6.
0, it flows into the suction pipe of the compressor 1 little by little via the capillary tube 14 for flow rate adjustment.

In this process, the gas-liquid mixed refrigerant flowing in from the suction pipe 8 disturbs the liquid level of the internal liquid phase refrigerant 12 as shown in FIG. Since the influence is not transmitted to the inside part, the liquid level is stable and the actual internal liquid level can be maintained. Further, even if the liquid refrigerant 12 inside the main body 6 is in a bubbling homing state as shown in FIG. 6, it is possible to maintain the actual liquid level in the same way.

[Effect of idea]

As described above, according to this invention, by providing a partition plate that partitions the inflow part of the liquid level detection piping provided on the side surface of the accumulator body from the inside of the body, liquid phase refrigerant inside the body can be Since the actual position of the liquid level inside the accumulator can be accurately detected without being affected by disturbances, the accuracy of detecting the liquid level inside the accumulator can be improved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an accumulator of an air conditioner according to an embodiment of the invention. Figure 2 shows
FIG. 2 is a perspective view of the main parts of the accumulator shown in FIG. 1 with the upper part cut away. FIG. 3 is a refrigerant circuit diagram using the accumulator according to this invention. Figures 4 and 5
The figure is an explanation showing the operating state of the accumulator according to FIG. 1. FIG. 6 is a refrigerant circuit diagram showing a conventional air conditioner. FIG. 7 and FIG. 8 are cross-sectional views showing an accumulator of a conventional air conditioner. In addition, in the figure, the same reference numerals indicate the same or equivalent parts, 1 is a compressor, 3 is an outdoor heat exchanger, 5 is an indoor heat exchanger, 6 is an accumulator, 7 is an outer shell, 8
9 is an inlet pipe, 9 is an outlet pipe, 10 is a liquid level detection pipe, and 11 is a partition plate.

Claims (1)

[Scope of utility model registration request] An inlet pipe for introducing the heat-exchanged gas-liquid mixed refrigerant into the main body, an outlet pipe for sending only the gas phase refrigerant of the introduced gas-liquid mixed refrigerant to the compressor, and an outlet pipe for feeding only the gas phase refrigerant of the introduced gas-liquid mixed refrigerant, and the refrigerant remaining in the main body. In an air conditioner accumulator equipped with an outlet piping for detecting the liquid level height of a liquid phase refrigerant, the inflow part of the liquid level detection piping provided on the side surface inside the main body is connected to the inside of the main body. An accumulator for an air conditioner, characterized in that a partition plate is provided for partitioning, and openings communicating with the main body are provided at the upper and lower parts of the partition plate.