JPS61168762A - Drier for refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention is an adsorbent such as a desiccant for absorbing and removing harmful blisters mixed in a refrigerant used in, for example, a refrigerator for an air conditioner. 7゜Regarding the mounting structure of an adsorbent case and base that can be quickly incorporated into a device so as to be able to carry and replace the agent [Prior art] Cooling work is performed using the latent heat of vaporization of a low boiling point liquid such as fluorocarbon. In the refrigeration system, the gas phase refrigerant compressed by the compressor is passed through the condenser and liquefied, and then
The refrigerant is stored in a receiver, which is a storage tank, from which the required amount of refrigerant is gradually supplied to the evaporator via a pressure reducing valve to perform cooling work through the absorption phenomenon of latent heat of vaporization.

Refrigerant circulation in refrigeration equipment takes place in a closed circuit, but
There is a possibility that moisture, etc. in the air may get mixed into the refrigerant. If moisture gets into the refrigerant pressure reducing valve, ice may form on the refrigerant pressure reducing valve, or rust may form, clogging the compressor valve. Countermeasures have been taken, such as interposing a case containing a desiccant between the two. Whether or not the desiccant has absorbed moisture and lost its function can be detected by, for example, mixing an indicator, such as cobalt chloride, which changes color in the presence of moisture into the desiccant.

[Problems to be Solved by the Invention] In the case of the refrigerant drying method as described above, in which the desiccant is sealed in the receiver, when the desiccant exceeds the moisture absorption capacity, the receiver is closed circuit. Since it is necessary to temporarily remove the refrigerant from the refrigerant circulation system, it is necessary to temporarily remove all the refrigerant from the refrigerant circulation system before removal, and then return it to the original state after replacing the receiver, which is a series of extremely complicated operations.

Also, unlike the former method, a method in which the dryer is completely separated from the receiver, or a method in which the two are separably housed in a single casing, requires that the refrigerant circulation system It is not necessary to extract all the refrigerant from the refrigerant, but instead use the refrigerant that exists in the so-called low-pressure side circulation system between the downstream side of the receiver, the evaporator, and the return to the compressor. It is sufficient to take steps to expel the refrigerant, which simplifies the operation of the refrigerant. However, it is cumbersome and time-consuming to open and close valves installed in the refrigerant piping and operate the compressor to expel the refrigerant. I couldn't avoid wasting money.

The present invention stores a desiccant agent for absorbing moisture mixed in a refrigerant used in a refrigerator for an air conditioner, and can be easily and quickly attached to a container or piping wall in which the refrigerant is stored in a cartridge type. The purpose is to provide a dryer that can

[Means for Solving the Problems] In order to achieve the above object, the dryer of the refrigeration apparatus of the present invention is provided with a case that houses a disposable and replaceable drying side rack, and further includes an inlet and an inlet for a refrigerant. A combination of a valve means for opening/closing the inlet/outlet, a means for removably attaching the case to any location in the refrigerant circulation path of the refrigeration system, and a desiccant housed in the case. Accordingly, the valve means is configured to be kept open in response to movement of the case when the case is attached to the location.

E-Function] In the dryer having the above-described structure, the desiccant is stored inside the case and an inlet/outlet for the refrigerant is provided, so that the dehydration effect is carried out within the case.

When the desiccant in the case loses its dehumidifying ability, the attachment of the case, such as a joint provided on the refrigerant container or piping, will no longer be subject to the pressing force exerted by the case until the case is removed from the means. The valve means that was kept open is closed, and the refrigerant is automatically prevented from flowing out to the outside world.

When a new desiccant case is installed in place of the old desiccant case, the case is screwed or fitted onto the means, and the movement of the case causes the valve means to maintain its open state.
The refrigerant inlet/outlet of the case and the refrigerant circulation channel of the refrigeration system are brought into communication with each other, and the drying function begins to function.

[Example] Below, the dryer of the present invention and its installation device will be specifically explained based on the accompanying drawings.

1 to 7 are diagrams illustrating an example in which the apparatus of the present invention is used for the purpose of dehumidifying a refrigerant used in a refrigeration system as shown as a schematic diagram of the system in FIG. 2 is a side cross-sectional perspective view and a partially enlarged side cross-sectional view of the desiccant case A, respectively, in which 1 is the case body, 1'
2 is a case mounting part; 3 is a desiccant contained in the case; and 3 is a desiccant contained in a cloth bag 4. The case main body part 1 and the case mounting part 2 are made of synthetic resin or metal and have a short cylindrical shape with an airtight structure.

For mounting the case, part 2 is provided with a screw groove a on the inner peripheral surface for screwing into means B, which will be described later, to form a passage for the refrigerant to enter and exit, and is made of aluminum foil, plastic or rubber film, etc. A thin film material 5 that can be easily broken by being pushed by a pointed protrusion and is impermeable to refrigerant is stretched over the inlet portion of the attachment portion 2 as a plug body. . 6 is provided behind the plug body 5,
This is a stopper for a check valve, which will be described later, and has a group of small holes for refrigerant circulation.

FIG. 3 is a side sectional view showing the installation of the desiccant storage case A in which the means B is assembled in the middle of the refrigerant piping 53 of the refrigeration system using piping joints 60 and 61; It has a short metal cylindrical body, and the outer circumferential surface is provided with a screw groove d for screwing the desiccant case A, and the inner space is closed by an extension spring 13 as a valve means. It incorporates a type of check valve that is energized. 11
14 is a valve body, 15 is a gasket, and 16 is a stopper for the spring 13. An arrowhead-shaped protrusion 12 is integrally attached to the valve body 11 made of metal or synthetic resin such that its tip protrudes outward from the tip opening of the mounting means body 10. is a sealing ring. Note that this figure shows the check valve in its closed state.

FIG. 5 shows another embodiment of the means B for installing the desiccant storage case A, and the protrusion 20 of the check rise is different from the arrowhead-shaped protrusion 12 of the embodiment shown in FIG. The two embodiments are provided with a distal end 20a cut obliquely and a refrigerant circulation hole 20b opened in this slope, but the structure of other parts is the same between the two embodiments.

FIG. 6 is a side sectional view of the receiver as an example of the installation of the desiccant storage case A, in which 52 is a receiver serving as a temporary storage tank for liquefied refrigerant in a refrigeration system;
are refrigerant pipes to which the receiver 52 should be attached, 53a and 5
3b are the refrigerant inlet side and the refrigerant outlet side of the pipe 53, respectively. The receiver is made of metal and has a cylindrical shape, and a means B for attaching the desiccant storage case A is attached to the side wall surface.

The seventh factor is an enlarged side sectional view of the mounting means 8 portion.

FIG. 8 is a refrigeration cycle diagram of an automobile air conditioner to which a desiccant case according to the present invention is attached, in which 40 is an automobile engine, 50 is a gas-phase refrigerant compressor, 41
is a pulley for driving the compressor, 42 is a belt that transmits the rotational force of the engine to the pulley 41, and 43 is a compressor 4
0 is a magnetic clutch for driving and intermittent driving, 51 is a condenser for cooling and liquefying gas-phase compressed refrigerant, 52 is a receiver for temporary storage of liquefied refrigerant, 53 is piping for refrigerant circulation, 54 is a refrigerant pressure reduction device, and 55 is a refrigerant evaporation device. 56 is a fan for generating cold air, and 57 is a heat-sensitive tube for controlling the operation of the pressure reducing device W154.

FIG. 4 shows a state in which the desiccant storage case A has been attached to the refrigerant pipe 53, and the installation of the case A to the means B is completed.
The installation is a side sectional view of the means, and the operation of the device will be described with reference to this and other figures.

Under the condition shown in FIG. 4, the desiccant storage case A screwed onto the refrigerant pipe 53 and the means B has a built-in desiccant 3 that removes moisture contained in the refrigerant. If the desiccant absorbs enough water and loses its function, the moisture mixed in the refrigerant will freeze and precipitate, clogging the vacuum expansion valve or corroding the equipment, so it is necessary to replace it with a new desiccant. occurs. Therefore, when the pipe 53 is started to be removed from the means B while rotating the case 8, the check valve 4 reaches its protrusion 12 on the case A despite the valve closing force due to the extension force of the spring 13. From the state where the valve is kept open by being pushed down by the stopper 6, the restraint by the stopper 6 begins to be released, and when the case A is removed, the valve is completely opened. In other words, the case removal operation and the check valve closing operation are automatically linked, and leakage of refrigerant from the refrigerant pipe 53 is prevented.

Next, when a new desiccant storage case A for replacement is started to be screwed into the installation means B, the stopper 5 of the case A gradually descends and comes into contact with the sharp tip of the protrusion 12 of the check valve, causing it to break. This plug 5 made of a membrane material that is easy to break breaks, and case A
The inner space is communicated with the inner space of the pipe 53, allowing refrigerant to flow therebetween. When the case A is further screwed in, the protrusion 12 of the check valve is pushed down by the stopper 6 despite the valve-closing force exerted by the extension spring 13, so that the valve is automatically maintained in the open state. Therefore, even during installation of the new case A, the inconvenience of leakage of refrigerant from the pipe 53 is almost completely eliminated.

In the first embodiment, a Win material such as aluminum foil, which is easily broken, was used as the plug 5. However, for example, a thin disc-shaped plug made of hard rubber can be attached to the short cylindrical case inside the part 2. It may be configured such that it is airtightly fitted into an annular groove provided on the circumferential surface, and when pressed by the protrusion 12 of the check valve valve, the stopper is pushed out of the groove and falls off.

The desiccant storage case A can be installed at an appropriate location in the flow path of the liquefied refrigerant and vaporized refrigerant, in addition to the middle of the receiver 52 or the refrigerant pipe 53 described above. can be selected.

Further, the internal space of the desiccant storage case A stored for replacement may be kept in a vacuum or may be filled with a refrigerant. In that case, the desiccant is replaced and the refrigerant is replenished at the same time.

Furthermore, desiccant storage case A can be used only for the purpose of storing desiccant; if it is used as a means of replenishing refrigerant to the refrigerant cycle by filling it with refrigerant instead of desiccant, it can be used to replenish refrigerant to the refrigerant cycle. This can be done quickly and easily while minimizing refrigerant leakage.

[Effect of the invention] The present invention has the following effects.

b) The desiccant storage case can be attached with a single touch or similar quickness, and the case can be attached and detached using fittings provided at certain locations.

(Example) When the desiccant storage case is attached or removed, a check valve is opened or closed to cut off communication between the inside of the case and the space where refrigerant exists, so the refrigerant desiccant of conventional refrigeration equipment is Unlike the case of replacement, there is no need for extremely troublesome preparation work such as removing or moving the refrigerant from the device in advance of the replacement work.

[Brief explanation of the drawing]

Figures 1 and 2 are a side cross-sectional perspective view and a partially enlarged side cross-sectional view of a desiccant storage case according to the present invention, which houses a desiccant for removing moisture in the refrigerant of a refrigeration system, and Figure 3 is a partially enlarged side cross-sectional view. The attachment of the desiccant storage case is a side sectional view of the means, and FIG. 4 is a side sectional view of the desiccant storage case attached to the means.
Fig. 5 is a side sectional view showing another embodiment of the mounting means, Fig. 6 is a side sectional view of the receiver as an example of the location where the desiccant storage case is mounted, and Fig. 7 is the mounting provided on the receiver. 8 is an enlarged side view of the means portion, and FIG. 8 is a refrigeration cycle diagram of an air conditioner for an automobile as an example of the installation location of the desiccant storage case according to the present invention.

Claims (1)

[Scope of Claims] 1) A disposable and replaceable desiccant storage case, a refrigerant inlet/outlet provided in the case, a valve means for opening/closing the refrigerant inlet/outlet, and the case is installed in a refrigerant circulation path of a refrigeration system. and a desiccant housed in the case, and the valve means receives movement of the case when the case is attached to the place. A desiccant storage case for a refrigeration system, characterized in that a valve is kept open. 2) The means for attaching the case is characterized by a combination of a screw type joint provided at the location and a joint provided on the case for fitting and screwing into the joint. A dryer for a refrigeration device according to claim 1. 3) The dryer for a refrigeration apparatus according to claim 1 or 2, wherein the valve means is incorporated inside a screw type joint provided at the location.