JPH0431503Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a liquid receiver for a refrigeration cycle such as a car air conditioner.

Conventional technology This type of liquid receiver is, for example,
As disclosed in Publication No. 20772, the body is
A covered upper cylinder having a refrigerant inlet passage and an outlet passage in the lid and an upper flange at the lower opening edge, a bottomed lower cylinder having a lower flange at the upper opening edge and containing a desiccant, and the upper and lower flanges. The lower end of the refrigerant suction pipe consists of multiple pairs of bolts and nuts that are removably connected, and the upper end is connected to the refrigerant outlet passage.
Some are known to have been inserted into the lower tank.

Problems to be Solved by the Invention The liquid receiver described above has the problem that multiple pairs of bolts and nuts must be fitted and removed in order to attach and detach the upper and lower tubes, which is troublesome and time-consuming. . Furthermore, there is a risk that the refrigerant that has flowed into the body from the refrigerant inlet passage may fall near the lower end suction port of the refrigerant suction pipe, agitating the refrigerant there and generating foam. When foam is generated, it is sucked into the refrigerant suction pipe, causing a liquid shortage in the piping of the refrigeration cycle.

The purpose of this invention is to provide a liquid receiver for a refrigeration cycle that solves the above problems.

Means for Solving the Problems A liquid receiver for a refrigeration cycle according to this invention has a body composed of an upper tank having a refrigerant inlet passage and a refrigerant outlet passage at the top, and a lower tank containing a desiccant. A screw hole is provided at the center of the bottom of the lower tank, and an upwardly protruding male threaded cylinder portion screwed into the screw hole is provided at the center of the top of the lower tank. It is inserted into the lower tank through the cylindrical part.

Function In the liquid receiver for refrigeration cycle according to this invention, the body is composed of an upper tank having a refrigerant inlet passage and a refrigerant outlet passage at the top, and a lower tank containing a desiccant. A hole is provided, and an upwardly protruding male threaded tube part screwed into the screw hole is provided at the center of the top of the lower tank, so the upper tank and lower tank can be attached and detached by fitting and disengaging the screw hole and the male threaded tube part. .

In addition, since the lower end of the refrigerant suction pipe whose upper end is connected to the refrigerant outlet passage enters the lower tank through the male threaded tube, the refrigerant that has flowed into the body from the refrigerant inlet passage is transferred to the lower end of the refrigerant suction pipe. Even if it tries to fall near the suction port, it will be blocked by the bottom of the upper tank.

Embodiment Next, an embodiment of this invention will be described with reference to the drawings.

The liquid receiver for the refrigeration cycle includes a body 11 in which a refrigerant is stored. The body 11 includes an upper tank 21 and a lower tank 22 that are detachably connected to each other.

The upper tank 21 has a generally cylindrical shape, its upper end is constricted, and the lid 12 is placed on the upper end of the upper tank 21 to close the opening formed by the constriction, and the two are joined together. The lid 12 may be provided integrally with the upper tank 12. The outer circumferential surface of the lid 12 is provided with a leftward protruding inlet pipe connection male threaded cylinder part 13 and a rightward protruding outlet pipe connection female threaded cylinder part 14, respectively. A refrigerant inlet passage 15 is opened upward from the lower surface of the lid 12 so that a refrigerant inlet passage 15 and a refrigerant outlet passage 16 communicate with the male threaded cylinder part 13 and the female threaded cylinder part 14, respectively. A peephole 17 for inspecting the refrigerant is formed above the refrigerant outlet passage 16, into which an O-ring 18 and a transparent glass body 19 are fitted. The upper end portion of the refrigerant suction pipe 20 is press-fitted into the downward opening end of the refrigerant outlet passage 16 . A screw hole 23 is provided in the center of the bottom wall 21a of the upper tank 21, and an annular O-ring groove 24 is provided on the lower surface around the hole, into which an O-ring 25 is fitted.

The lower tank 22 has a generally short cylindrical shape with a bottom as a whole, and is composed of a cylindrical peripheral wall 26, and a bottom wall 27 and a top wall 28 that are connected to the upper and lower ends of the cylindrical peripheral wall 26, respectively. An upwardly protruding male threaded cylindrical portion 29 having a male thread 30 is provided at the center of the bottom wall 27 , and is screwed into the screw hole 23 . The bottom wall 27 is formed into a curved shape projecting downward, and a hanging portion 31 is formed at the peripheral edge of the bottom wall 27, which is connected to the peripheral wall 26.
It is tightly fitted into the lower edge of the inner surface of the

Inside the lower tank 26, two annular strainers 32 are arranged in upper and lower stages. Both strainers 32 have a size that allows them to cross the inside of the lower tank 22, and are in close contact with the inner surface of the peripheral wall 26 of the lower tank 22 at their peripheral edges. Strainer 32
The inner diameter of the center hole 33 is the same as the inner diameter of the male threaded cylindrical portion 29, and
A liquid guide pipe 34 is inserted so as to straddle these. A plurality of small holes 35 are formed in a portion of the liquid guide pipe 34 located between the cylindrical portion 29 and the upper strainer 32. A desiccant 37 such as silica gel is packed between both strainers 32 via filters 36, respectively. Refrigerant suction pipe 20
The lower ends of the strainers protrude downward from the upper tank 21, enter the lower tank 22, and are inserted into the center holes 33 of both strainers 32 via liquid guide pipes 34.

The refrigerant flowing in from the refrigerant inlet passage 15 is guided from the upper tank 21 to the lower tank 22 by the liquid guide pipe 34 and stored there;
Do not fall directly into the interior. The refrigerant in the lower tank 22 is sucked up by the suction pipe 20 and guided to the refrigerant outlet passage 16.

While the refrigerant is stored in the lower tank 22,
The desiccant 37 absorbs the moisture contained in this refrigerant. When the desiccant 37 absorbs moisture until it becomes saturated, it is necessary to replace the desiccant 37.
At that time, by rotating the lower tank 22 around its central axis, the male threaded cylinder part 29 is removed from the screw hole 23 to separate the lower tank 22 from the upper tank 21, and the male threaded cylinder part of another lower tank 22 is removed. 29 into the screw hole 23, the lower tank 22 is connected to the upper tank 21. The separated lower tank 22 is heated to restore the function of the desiccant 37 and prepare for reuse.

In the above embodiment, the liquid guide pipe 34 is provided around the refrigerant suction pipe 20 in the lower tank 22, but this is not necessarily necessary.

Effects of the invention According to this invention, the upper tank and the lower tank can be attached and detached by fitting and disengaging the screw hole and the male threaded cylinder, so the upper tank and the lower tank can be easily attached and detached with one touch.

In addition, even if the refrigerant that has flowed into the body from the refrigerant inlet passage tries to fall near the lower end suction port of the refrigerant suction pipe, it will be blocked by the bottom of the upper tank, so the refrigerant near the lower end suction port of the refrigerant suction pipe will fall. There is no agitation and there is no risk of foaming. Therefore, there is no risk of liquid shortage occurring in the piping of the refrigeration cycle.

[Brief explanation of drawings]

The drawing is a longitudinal sectional view showing an embodiment of this invention. 11...Body, 15...Refrigerant inlet passage, 16
... Refrigerant outlet passage, 20 ... Refrigerant suction pipe, 21 ...
...Upper tank, 22...Lower tank, 23...Threaded hole, 29...Male thread cylinder portion, 37...Drying agent.

Claims (1)

[Scope of utility model registration request] The body 11 is composed of an upper tank 21 having a refrigerant inlet passage 15 and a refrigerant outlet passage 16 at the top, and a lower tank 22 containing a desiccant 37,
A screw hole 23 is provided at the center of the bottom of the upper tank 21 , and an upwardly protruding externally threaded cylindrical portion 29 screwed into the screw hole 23 is provided at the center of the top of the lower tank 22 . A liquid receiver for a refrigeration cycle in which a lower end of a suction pipe 20 is inserted into a lower tank 22 through a male threaded cylinder part 29.