CN117836573A

CN117836573A - Liquid storage device

Info

Publication number: CN117836573A
Application number: CN202280056572.4A
Authority: CN
Inventors: 细川侯史; 大江佑马; 小泽武治; 岩山利道
Original assignee: Fujikoki Corp
Current assignee: Fujikoki Corp
Priority date: 2021-08-24
Filing date: 2022-08-15
Publication date: 2024-04-05
Also published as: WO2023026885A1; JPWO2023026885A1

Abstract

Provided is a liquid reservoir which has excellent assemblability and can ensure the function of a refrigeration cycle even when subjected to vibration. The reservoir has: a body; a tube disposed inside the body; a hooking portion extending from an outer periphery of the pipe; and a desiccant container having two pockets for containing a desiccant and a connecting portion for connecting the pockets to each other, wherein the desiccant container is attached by hooking the connecting portion to the hooking portion.

Description

Liquid storage device

Technical Field

The present invention relates to a liquid reservoir.

Background

In order to separate and store the refrigerant circulating in the refrigeration cycle, a liquid collection tank, a liquid reservoir, and the like are used. As such a receiver, there is a receiver that separates the refrigerant flowing into the inside into a gas-phase refrigerant and a liquid-phase refrigerant, and stores the liquid-phase refrigerant therein, and a desiccant is incorporated in the receiver in order to remove moisture in the refrigerant.

However, when the desiccant is immersed in the liquid-phase refrigerant entirely, the pressure in the tank is reduced at the time of starting the compressor, so that the refrigerant is rapidly boiled (a bumping phenomenon) starting from the desiccant, and the pressure in the tank may be generated due to this, thereby causing the tank to vibrate and abnormal noise to occur.

On the other hand, when the desiccant is not immersed in the liquid-phase refrigerant in its entirety, the problem of abnormal noise during the start-up of the compressor is not generated, but when the desiccant is located in the falling path of the liquid-phase refrigerant flowing into the tank, the liquid-phase refrigerant falling into the tank collides with the desiccant and rebounds, and there is a concern that the liquid-phase refrigerant is sucked from the suction port of the gas-phase refrigerant, and the compressor sucks the liquid-phase refrigerant.

In the accumulator shown in patent document 1, a part or all of the desiccant is disposed above the highest liquid level position (Lmax) of the liquid-phase refrigerant in the tank when the compressor is stopped, and the desiccant is disposed at a position avoiding the falling path of the liquid-phase refrigerant.

Prior art literature

Patent literature

Patent document 1: japanese patent application laid-open No. 2014-52139

Problems to be solved by the invention

According to the reservoir of patent document 1, the bag containing the desiccant is fixed by a string-like fixing mechanism such as a bundling belt in a state of being wound around the suction pipe. Therefore, it takes time to assemble the reservoir, and the number of parts increases.

In contrast, it is also an aspect to fix the bag containing the desiccant without using a binding band or the like. However, if the reservoir is vibrated in a vehicle-mounted state, for example, the bag containing the desiccant moves up and down, and under the load, a part of the desiccant is crushed into powder, and foreign matter flows out to the pipe, which may impair the function of the refrigeration cycle.

Disclosure of Invention

Accordingly, an object of the present invention is to provide a liquid reservoir which is excellent in assemblability and which can ensure a function of a refrigeration cycle even when subjected to vibration.

Means for solving the problems

In order to achieve the above object, a liquid reservoir according to the present invention includes:

a body;

a tube disposed inside the body;

a hooking portion extending from an outer periphery of the pipe; and

a desiccant container having two pockets for containing a desiccant and a connecting portion for connecting the pockets to each other,

the desiccant container is attached by hooking the coupling portion to the hooking portion.

Effects of the invention

According to the present invention, it is possible to provide a liquid reservoir which is excellent in assemblability and which can ensure the function of a refrigeration cycle even when subjected to vibration.

Drawings

Fig. 1 is a longitudinal sectional view of a liquid reservoir according to a first embodiment.

Fig. 2 is a cross-sectional view of the reservoir taken along line A-A of fig. 1 in plan view.

Fig. 3 is a side view of the outer tube.

Fig. 4 is a top view of the outer tube.

Fig. 5 is a plan view showing a material of the desiccant container before sewing.

Fig. 6 is a plan view showing a state of a raw material during sewing of the desiccant container.

Fig. 7 is a front view showing a state in which the desiccant container is assembled in the outer tube.

Fig. 8 is a longitudinal cross-sectional view of a reservoir according to a second embodiment.

Fig. 9 is a cross-sectional view of the reservoir taken along line B-B of fig. 8 in plan view.

Fig. 10 is a front view showing a state in which the desiccant container is assembled in the outer tube.

Detailed Description

The reservoir 1 according to the embodiment of the present invention is described below with reference to the drawings.

(first embodiment)

Fig. 1 is a longitudinal sectional view of a reservoir 1 according to a first embodiment. Fig. 2 is a cross-sectional view of the reservoir 1 taken along line A-A of fig. 1 in a plan view. The reservoir 1 includes a tank body 2, a double pipe 5 disposed in the tank body 2, and a desiccant container 11 containing a desiccant (moisture absorbent) DA.

The tank main body 2 is constituted by a bottomed cylindrical body 3 having an upper end opened, and a header 4 joined to the body 3 by a welded portion 10 by full-periphery welding to close the open end of the body 3. Both the body 3 and the header 4 are formed of a metal such as an aluminum alloy. In the present specification, the header 4 side is set to be the upper side, and the bottom side of the body 3 is set to be the lower side.

The header 4 formed in a substantially disk shape has a refrigerant inflow hole 8 and a refrigerant outflow hole 9 formed therethrough in the longitudinal direction. The inner tube 6 extending to the vicinity of the inner bottom of the body 3 is connected to the refrigerant outflow hole 9. An outer tube (also simply referred to as tube) 7 is externally provided outside the inner tube 6 to form a double tube 5.

Below the header 4, a gas-liquid separation member 16 is provided in a top cylindrical shape, and the gas-liquid separation member 16 separates the mixed refrigerant (refrigerant in which a gas phase component and a liquid phase component are mixed) from the refrigerant inflow hole 8 into a liquid phase refrigerant having a high density, a compressor oil (hereinafter referred to as "oil"), and a gas phase refrigerant having a low density.

The inner tube 6 is made of a metal such as aluminum alloy, has an opening at its lower end, and has an upper end connected to the refrigerant outflow hole 9 of the header 4. The lower portion of the inner tube 6 is fitted inside a plurality of tube reinforcing ribs 7a (fig. 2) protruding from the inner peripheral surface of the outer tube 7, whereby the inner tube 6 is stably held in the outer tube 7.

The outer tube 7 is made of synthetic resin and is mounted in the body 3 in a state where the upper end portion is opened. A cylindrical filter 20 is provided at the bottom of the outer tube 7, and a mesh member 21 made of metal or resin is insert-molded into the filter 20, and the filter 20 is placed on the inner bottom surface of the body 3.

Fig. 3 is a side view of the outer tube 7, and fig. 4 is a top view of the outer tube 7. In fig. 3 and 4, the outer tube 7 has a flange-like portion 7b extending radially outward at the outer periphery of the intermediate position in the longitudinal direction. The flange-like portion 7b fitted to the body 3 has a reinforcing rib 7c, an opening 7d for a flow path surrounded by the rib 7c, and a cutout portion 7e extending from the outer periphery of the flange-like portion 7b to the outer tube 7.

In fig. 4, the outer tube 7 has upper and lower hooking portions 7f and 7g extending from the outer periphery of the outer tube 7 in parallel with the cutout portion 7e, and a rectangular plate-like portion 7h provided so as to be continuous with the upper and lower hooking portions 7f and 7g and the outer tube 7 at upper and lower positions at substantially equal distances from the flange-like portion 7b. Referring to fig. 7 described later, the widths of the upper hooking portion 7f and the lower hooking portion 7g are larger than the thickness of the plate-like portion 7h when viewed in the radial direction of the outer tube 7. Preferably, the tips of the upper hooking portion 7f, the lower hooking portion 7g, and the plate-like portion 7h are in contact with the inner periphery of the body 3 in the assembled state.

The plate-like portion 7h has an upper opening 7i formed between the upper hooking portion 7f and the flange-like portion 7b, and a lower opening 7j formed between the flange-like portion 7b and the lower hooking portion 7 g.

Next, the desiccant container 11 will be described. Fig. 5 is a plan view showing a material of the desiccant container 11 before sewing. Fig. 6 is a plan view showing a state of a material during sewing of the desiccant container 11.

First, as shown in fig. 5, a cloth-like body FT such as a felt having air/water permeability and desired shape retention is cut into a substantially rectangular shape. Then, the cloth FT is folded back on the widthwise center line WC, and the desiccant DA is housed inside the cloth FT. Then, the periphery of the cloth FT is sewn along the sewing line SL shown by the chain line in fig. 6, and the desiccant DA is independently enclosed in the inside of the bag portions 11a, 11b of the desiccant container 11 formed as a bag. In a region outside the sewing line SL with respect to the desiccant DA, a central region (here, a second connecting portion) RA and an end region (here, a first connecting portion) RE connecting the bag portions 11a and 11b are overlapped with each other without enclosing the desiccant DA.

Next, the desiccant container 11 is folded in half along the center line LC passing through the center region RA, and joined by sewing in a state where the end regions RE face each other. Thus, the desiccant container 11 including the bag portions 11a and 11b containing the desiccant DA is formed in an annular band shape.

Fig. 7 is a front view showing a state in which the desiccant container 11 is assembled to the outer tube 7. The desiccant DA is not stored in a full state in the inside of the bag portions 11a and 11b, and the volume of the bag portions 11a and 11b is left with a certain margin. Then, the centers of the bag portions 11a, 11b are recessed in the width direction to form concave portions 11c, and the desiccant DA is moved to both sides thereof.

In this state, the opposite portion of the end portion RE is engaged with the upper engaging portion 7f, and the folded portion of the central portion RA is engaged with the lower engaging portion 7g, while the end portion RE is directed upward, the central portion RA is directed downward, and the concave portion 11c is engaged with the notch portion 7e of the flange-like portion 7b. The desiccant container 11 can be attached to the outer tube 7 by pressing the desiccant container 11 into the outer tube 7 while maintaining this state.

Then, as shown in fig. 7, a filter 20 is attached to the lower end of the outer tube 7, and the outer periphery of the flange-like portion 7b is fitted to the inner periphery of the body 3, whereby the outer tube 7 is assembled with the body 3. In the assembled state of the body 3, the outer tube 7 is eccentric to the body 3, and the desiccant container 11 is disposed in the widest space between the outer periphery of the outer tube 7 and the inner periphery of the body 3.

The operation of the reservoir 1 configured as described above will be described with reference to fig. 1. In the following description, the case where the accumulator 1 is disposed between the evaporator and the compressor of the refrigeration cycle, and the moisture contained in the refrigerant from the evaporator is removed to generate a gas refrigerant, and the gas refrigerant is returned to the compressor will be described as an example.

When the refrigerant is discharged from the evaporator, the refrigerant is sent to the accumulator 1 through a connecting pipe (not shown). The refrigerant that has reached the accumulator 1 flows into the body 3 through the refrigerant inflow hole 8, collides with the gas-liquid separation member 16, and is separated into a liquid-phase refrigerant and oil having a high density, and a gas-phase refrigerant (gas refrigerant) having a low density.

The liquid-phase refrigerant after the gas-liquid separation and the oil are stored in the machine body 3 under the action of dead weight. In this process, separation of the liquid-phase refrigerant and the oil is continued, and the oil is accumulated below the liquid-phase refrigerant. At this time, the liquid surface of the liquid-phase refrigerant reaches a height position of a part (substantially the center) of the desiccant container 11 impregnated with the desiccant. Therefore, both the moisture contained in the liquid-phase refrigerant and the moisture contained in the vapor-phase refrigerant are absorbed by the desiccant DA.

On the other hand, the gas-liquid separated gas-phase refrigerant flows in from the upper end opening of the outer tube 7, and descends inside the outer tube 7. Then, the refrigerant flows into the folded inner tube 6 at the bottom of the outer tube 7, rises in the inner tube 6, and is guided to the refrigerant outflow hole 9. At this time, the oil accumulated in the bottom of the body 3 through the oil return hole (not shown) is sucked, and a gas-phase refrigerant containing a rich oil component is formed therein, and is supplied from the refrigerant outflow hole 9 to the compressor through the connection pipe (not shown).

According to the present embodiment, the desiccant container 11 formed in the shape of a ring can be easily attached by being hooked to the upper hooking portion 7f and the lower hooking portion 7g without using a binding band or the like, and the desiccant container 11 can be reliably held by being pulled up and down, so that the upward and downward movement of the desiccant container 11 can be suppressed. Therefore, the number of parts of the reservoir 1 can be reduced, and the man-hour for manufacturing can be reduced. Since the desiccant container 11 extends over substantially the entire length of the outer tube 7, the desiccant DA that is not immersed in the liquid refrigerant is added, whereby the slump phenomenon can be suppressed.

The forces transmitted from the desiccant container 11 to the upper and lower engaging portions 7f and 7g are supported by the plate-like portion 7h, and thus the excessive stress of the upper and lower engaging portions 7f and 7g can be suppressed. Further, by engaging the recess 11c with the notch 7e, the bag portions 11a and 11b are divided into upper and lower portions, respectively, and the desiccant DA accommodated in the bag portions is less likely to move up and down through the recess 11 c. Therefore, even when the reservoir 1 is subjected to vibration, the desiccant can be suppressed from being crushed.

As shown in fig. 2, the facing surfaces of the bag portions 11a and 11b of the desiccant container 11 are exposed at the upper opening 7i and the lower opening 7j of the plate-like portion 7h arranged between the upper hooking portion 7f and the lower hooking portion 7 g. Thus, moisture in the liquid-phase refrigerant or the gas-phase refrigerant passing through the upper opening 7i and the lower opening 7j can be efficiently absorbed by the desiccant DA.

In addition, since the upper portion of the desiccant container 11 is held in a mountain shape as viewed in the direction of fig. 7 in a state in which the desiccant container 11 is engaged with the upper engaging portion 7f, the liquid-phase refrigerant falling from above obliquely collides with the surface of the desiccant container 11 and is directed to the side, and thus upward bouncing can be prevented. Further, by hooking the opposite portion of the end portion RE to the upper hooking portion 7f, as shown in fig. 7, the cut edge of the cloth-like material is directed upward, which serves as a buffer, and the liquid-phase refrigerant falling from above can be prevented from bouncing back.

(second embodiment)

Fig. 8 is a longitudinal cross-sectional view of the reservoir 1A according to the second embodiment. Fig. 9 is a cross-sectional view of the reservoir 1A taken along line B-B of fig. 8 in a plan view. The reservoir 1A is different from the above embodiment in the structure formed outside the outer tube 7A. The same reference numerals are given to the other components, and redundant description thereof is omitted.

As shown in fig. 9, three support beams 7Ab planted on the outer periphery of the outer tube 7A extend radially outward, and the outer ends thereof contact the inner periphery of the body 3. One side edge of the pair of support plates 7Ac is connected to two support beams 7Ab opposed to each other through the outer tube 7. The support plate 7Ac extends parallel to the axis of the outer tube 7A, and the other side edge abuts against the inner periphery of the body 3. The outer tube 7A is positioned in the body 3 by means of the support beams 7Ab and the support plates 7 Ac. The support beam 7Ab and the support plate 7Ac form a flow path therebetween.

An upper hooking portion 7Af is formed between the pair of support plates 7Ac and above the support plates 7Ac so as to extend parallel to the support plates 7Ac from the outer periphery of the outer tube 7A. The rectangular plate-like portion 7Ah is connected to the lower end side of the upper hooking portion 7Af and the outer periphery of the outer tube 7A.

Fig. 10 is a front view showing a state in which the desiccant container 11A is assembled to the outer tube 7A. A pair of lower locking plates 7Ag extending parallel to the support plate 7Ac from the outer periphery of the outer tube 7A are formed between the pair of support plates 7Ac and near the lower end of the support plate 7Ac at intervals. Preferably, the top ends of the upper hooking portion 7Af, the plate-like portion 7Ah, and the lower locking plate 7Ag are in contact with the inner periphery of the body 3 in the assembled state. An opening may be formed in the plate-like portion 7 Ah.

In the present embodiment, the desiccant container 11A is formed through the same process as that shown in fig. 5 and 6, but has no recess in the center, and the desiccant DA is contained in the bag portions 11Aa and 11Ab in a substantially full state.

In the present embodiment, when the desiccant container 11A is assembled, the folded portion of the central region RA is engaged with the upper engaging portion 7Af with the central region RA (here, the first connecting portion) facing upward and the end region RE (here, the second connecting portion) facing downward, and the opposite portion of the end region RE is inserted between the pair of lower engaging plates 7Ag. The desiccant container 11A can be attached to the outer tube 7A by pressing the desiccant container 11A into the outer tube 7A along the support plate 7Ac while maintaining this state.

At this time, the plate-like portion 7Ah extends from the upper end to the vicinity of the intermediate position between the bag portions 11Aa, 11Ab, and the bag portions 11Aa, 11Ab contact each other below the plate-like portion 7 Ah. The outer surfaces of the bag portions 11Aa and 11Ab are held in contact with the support plate 7 Ac.

According to the present embodiment, the desiccant container 11A formed in the shape of an annular band can be easily attached by being attached to the upper attachment portion 7Af and the lower locking plate 7Ag without using a binding band or the like, and the desiccant container 11A can be reliably held by being pulled up and down. The desiccant DA stored in the inside of the bag portions 11Aa and 11Ab cannot move relative to each other, and further, the outer side surfaces of the bag portions 11Aa and 11Ab are held in contact with the support plate 7Ac, so that the desiccant is prevented from being crushed even when the reservoir 1A is vibrated.

The present invention has been described above with reference to the embodiments, but the present invention is not limited to the embodiments, and various modifications can be made within the scope of the present invention.

Symbol description

1. 1A reservoir

2 box main body

3 machine body

4 header

5. 5A double-layer tube

6 inner tube

7. 7A outer tube

8 refrigerant inflow holes

9 refrigerant outflow holes

11. 11A desiccant container

20 filters.

Claims

1. A reservoir, comprising:

a body;

a tube disposed inside the body;

a hooking portion extending from an outer periphery of the pipe; and

2. A reservoir according to claim 1, wherein,

the hanging part comprises an upper hanging part and a lower hanging part,

the desiccant container is ring-shaped, and has a first connecting portion connecting one end of the bag portion and a second connecting portion connecting the other end of the bag portion,

the first connecting portion is connected to the upper connecting portion in a hanging manner, and the second connecting portion is connected to the lower connecting portion in a hanging manner.

3. A reservoir according to claim 2, wherein,

has a flange-like portion formed on the outer periphery of the tube and having a cutout portion,

a recess formed in the desiccant container engages with the cutout.

4. A reservoir according to claim 2 or 3, wherein,

a plate-like portion having an opening is disposed between the upper hooking portion and the lower hooking portion,

the pocket portions of the desiccant container are disposed on both sides with the plate-like portions interposed therebetween.

5. A reservoir according to claim 1, wherein,

the hanging part comprises an upper hanging part and a pair of lower clamping plates,

the first connecting portion is connected with the upper connecting portion in a hanging mode, and the second connecting portion is inserted between the lower locking plates.

6. A reservoir according to claim 5, wherein,

a plate-like portion is formed from the upper hooking portion to the lower locking plate,

a pair of support plates connected to the pipe are formed in parallel with the plate-like portion,

the bag portions of the desiccant container are disposed across the plate-like portion and are in contact with the support plates, respectively.