JPH04113865U - liquid tank - Google Patents

Abstract

(57) [Summary] [Purpose] To reliably remove moisture and dust from the refrigerant in a "liquid tank" and to facilitate desiccant replacement. [Structure] A desiccant filling part (30) facing into the tank body part (2) is removably attached to the refrigerant inlet part (5). Furthermore, a sealing member (39) is interposed between the desiccant filling part (30) and the refrigerant inlet part (5) to tightly fit the desiccant filling part (30) into the refrigerant inlet part (5). to wear Furthermore, desiccant filling section (30)
, a bottomed cylindrical desiccant case (31) with many small holes (38), and a desiccant (3) filled in this desiccant case (31).
2) and a filter (33) located at least on the refrigerant inlet (37) side of the desiccant case (31).

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a liquid that is incorporated into the cooling cycle of automobile air conditioners, etc. Regarding tanks.

0002

[Conventional technology]

In general, automotive air conditioning systems deal with the storage of excess refrigerant during the cooling cycle, gas-liquid content, and It has a liquid tank to remove moisture, dust, etc. (for example, For example, Japanese Utility Model Application Publication No. 58-108,380).

0003 As shown in FIG. 4, a conventional liquid tank 1 includes a tank main body 2 having a cylindrical shape with a bottom. , and a head portion 4 that closes the upper opening 3 of the tank body portion 2.

0004 A refrigerant inlet portion 5 and a refrigerant outlet portion 6 are formed in the head portion 4. The inlet section 5 is connected at one end to an inlet conduit 16 communicating with the condenser and at the other end to a tank. This is a passage communicating with the internal space of the main body part 2. In addition, the refrigerant outlet section 6 is connected to an expansion valve. A connected outlet conduit 17 is connected to one end, and a refrigerant extraction pipe 7 is attached to the other end. It is an L-shaped passage, and only the liquid refrigerant stored at the bottom of the tank body 2 is taken out. Therefore, it hangs down to the vicinity of the bottom surface 2c of the tank body 2. Also, this refrigerant removal Above the pipe 7 is a sight glass for visually observing the refrigerant flow state in the refrigerant outlet section 6. 8 is provided, and in the middle part of the refrigerant extraction pipe 7, there is a desiccant filling part through which the refrigerant flows. 9 is provided.

[0005] The desiccant filling section 9 includes an upper support plate 11 and a lower support plate 12 in which a large number of small holes 10 are formed. and between these support plates 11 and 12, a desiccant 14 and glass wool etc. A filter 15 consisting of the following is housed so as to be wrapped by the lower support plate 12. Na As the desiccant 14, silica gel, synthetic zeolite, etc. are generally used. There is.

[0006] Then, while the refrigerant flowing into the tank body 2 flows through the desiccant filling section 9, The desiccant 14 adsorbs moisture in the refrigerant, and the filter 15 removes dust from the refrigerant. I try to leave. Note that the filter 15 is damaged due to the vibration of the liquid tank 1. It also has the function of preventing the desiccant 14 from being crushed.

[0007]

[Problem that the idea aims to solve]

However, conventional liquid tanks are prone to problems due to liquid tank assembly errors. Therefore, a gap may occur between the inner peripheral surface of the tank body 2 and the outer peripheral surface of the lower support plate 12. The refrigerant flowing into the tank body 2 passes through the desiccant filling section 9. There was a risk that he would pass through this gap without doing so. This prevents dirt containing moisture and dust. There was a risk that the remaining refrigerant would be led to the expansion valve, resulting in a decrease in cooling performance.

[0008] In addition, the desiccant filling section 9 of this liquid tank has a lower support plate 12 attached to the tank main body. It is attached by press-fitting into the step part 23 of No. 2, and the tank body part 2 and the head part 4 pressurize the upper part of the tank body part 2 by crimping means such as caulking. Therefore, when replacing the desiccant 14, the desiccant filling section 9 Cannot be removed alone; liquid tank 1 must be removed and replaced. There was a problem. In addition, the above-mentioned Utility Model Application Publication No. 58-108,380 describes the refrigerant A liquid tank is disclosed in which a desiccant filling part is formed using a take-out pipe. Even with this liquid tank, there is an inlet conduit that is screwed to the refrigerant inlet of the head. After removing the outlet conduit screwed into the refrigerant outlet section, remove the tank body. It is necessary to remove the head section from the tank body and take out the desiccant filling section from the upper opening of the tank body. Therefore, it was troublesome to replace the desiccant.

[0009] The present invention was devised in view of the problems of the conventional technology. It is possible to reliably remove moisture and dust, and the desiccant can be easily replaced. The purpose is to provide a liquid tank that can.

0010

[Means to solve the problem]

In order to achieve the above object, the present invention includes a bottomed cylindrical tank body and a tank body. The refrigerant inlet section provided in the head section has a head section that closes the upper opening of the section. The refrigerant flows into the tank body, and the liquid cooling stored in the lower part of the tank body cools. A liquid tank configured to allow a medium to flow out from a refrigerant outlet provided in the head portion. , a desiccant filling part facing into the tank body can be attached and detached to the refrigerant inlet part. The desiccant filling section is installed between these desiccant filling sections and the refrigerant inlet section. A sealing member is interposed to tightly fit the refrigerant inlet to the refrigerant inlet, and the refrigerant The desiccant filling part is connected to a bottomed cylindrical desiccant case with many small holes and this desiccant. The desiccant filled in the case and at least the position on the refrigerant inlet side of the desiccant case. This liquid tank is characterized in that it is composed of a filter and a filter.

[0011]

[Effect]

The liquid tank according to the present invention configured as described above has a dry tank facing into the tank body. The desiccant filling section is attached to the refrigerant inlet section, and the desiccant filling section is installed between the desiccant filling section and the refrigerant inlet section. The desiccant filling part is tightly fitted to the refrigerant inlet part by interposing a sealing member. Therefore, all the refrigerant flowing from the refrigerant inlet of the head passes through the desiccant filling section. The filter placed on the refrigerant inlet side of the desiccant case removes dust. After moisture is adsorbed by the desiccant, it flows into the tank body through numerous small holes. The Rukoto. Also, when replacing the desiccant, make sure to use the drying agent from the refrigerant inlet of the head. Only the desiccant filling part needs to be removed, and unlike conventional liquid tanks, the liquid It may be necessary to remove and replace the tank or remove the head from the tank body. There's no need.

0012

【Example】

Hereinafter, one embodiment of the present invention will be described based on the drawings. Fig. 1 is a longitudinal cross-sectional view showing an embodiment of the present invention, Fig. 2 is a plan view of the same embodiment, and Fig. 3 is the same. FIG. 3 is a sectional view of a main part showing the installation procedure of the embodiment.

[0013] The liquid tank 20 according to this embodiment is a cylindrical tank with a bottom, as shown in FIG. It has a main body part 2 and a head part 4 that closes the upper opening 3 of the tank main body part 2, The gas-liquid mixed refrigerant flows down into the tank body 2 from the refrigerant inlet 5 provided in the head 4. The liquid refrigerant stored at the bottom of the tank body 2 is sent to the tank via the refrigerant outlet pipe 7. The refrigerant is configured to flow out from the refrigerant outlet section 6 of the head section 4.

[0014] The tank body 2 is made of a lightweight and relatively easy-to-form material such as aluminum. It is formed by crimping such as caulking on the uneven part 22 formed on the outer circumference of the head part It is connected to this head portion 4 by applying pressure. And the tank The main body part 2 has a large diameter part 2a at its upper part and a diameter smaller than the large diameter part 2a at its lower part. It is formed in the small diameter portion 2b. This small diameter portion 2b is formed with the lower half of the small diameter portion 2b first. It is formed into a narrow shape to reduce the volume around the refrigerant extraction pipe 7. Like this For example, the amount of refrigerant used is suppressed, and the tapered shape of this small diameter portion 2b reduces the amount of refrigerant. Even if the liquid level in the tank body 2 increases, the level of the stable liquid in the tank body 2 increases and the liquid level reaches the bottom 2c. The liquid refrigerant can be reliably sucked up from the refrigerant take-off pipe 7 hanging down.

[0015] The head portion 4 attached to the large diameter portion 2a has one end communicating with the capacitor. A refrigerant inlet connected to the inlet conduit 16 and whose other end communicates with the internal space of the tank body 2 A mouth portion 5 is formed. Further, adjacent to this refrigerant inlet portion 5, one end is provided with an expansion valve. L-shaped cross section connected to the communicating outlet conduit 17 and connected to the refrigerant extraction pipe 7 at the other end A refrigerant outlet section 6 is formed. The fixation of the inlet conduit 16 and the head part 4 is as shown in FIG. As shown in FIG. This is done by inserting and screwing into the screw hole 26 of the head portion 4. On the other hand, the exit The conduit 17 also has a bolt 2 inserted into a through hole (not shown) formed in the bulged portion 24 of the outlet conduit 17. 1 and screw it into the screw hole (not shown) in the head part 4 to secure it to the head part 4. It has become established. "29" is connected to the inlet conduit 16 and the outlet conduit 17. An O-ring is shown to improve airtightness with the head portion 4. Furthermore, the head section 4 As shown in FIG. 2, there is a A pressure switch that detects the pressure of the refrigerant in the sight glass 8 and the liquid tank 20 27, when the refrigerant in the liquid tank 20 reaches high temperature and pressure, it melts and releases the refrigerant to the outside. A fusible plug 28 is formed to release the liquid into the liquid.

[0016] Particularly, in the liquid tank 20 according to this embodiment, the refrigerant inlet section 5 of the head section 4 has a dry A desiccant filling section 30 is detachably attached, and this desiccant filling section 30 is shown in the figure. 3, a desiccant 32 and filters 33, 34 are placed in a desiccant case 31. It consists of loading. The desiccant case 31 is lightweight and has a relatively small molding capacity. A cylinder with a bottom that can be inserted into the refrigerant inlet 5 and made of a simple resin material or metal material. A flange is formed in a shape and further engages with a step portion 35 formed in the refrigerant inlet portion 5. 36 are formed. Therefore, when inserting the desiccant case 31 into the refrigerant inlet 5, If the tank body 2 The screw 36 engages with the stepped portion 35 to prevent the desiccant case 31 from falling off. Ru.

[0017] Further, in the upper part of the desiccant case 31, a refrigerant inlet 37 communicating with the refrigerant inlet section 5 is provided. On the other hand, the side wall has a number of small holes communicating with the internal space of the tank body 2. 38 are drilled. As a result, the refrigerant that has flowed into the refrigerant inlet section 5 is After being guided into the desiccant case 31 from the port 37 and flowing through the desiccant case 31, , is discharged into the tank main body 2 from the small hole 38. In addition, the small hole Conditions such as opening position, number of openings, and opening area can be changed in various ways, such as , the small hole arranged in the upper part is formed with a smaller diameter than the small hole in the lower part, or the small hole in the upper part is The number of holes may be set to be smaller than the small holes at the bottom. In this way, the refrigerant The refrigerant flowing in from the inlet flows almost evenly throughout the axial direction of the desiccant case. It becomes. In addition, the small holes are formed to face the inner circumferential wall of the tank body. You may do so. In this way, the refrigerant flowing out from the small hole will be When the liquid refrigerant collides with the wall, bubbling of the liquid refrigerant is rapidly suppressed, and gas-liquid separation is performed well. become.

[0018] Furthermore, a filter 33, 34 are attached to each. Of these filters, the refrigerant inlet 37 side The filter 33 installed in the On the other hand, the filter 34 at the bottom prevents the desiccant 32 from being crushed. Its main function is as a cushioning material. In addition, the function to remove dust in the refrigerant If only the filter is required, it is sufficient to attach the filter only to the refrigerant inlet 37 side.

[0019] A desiccant 32 is filled between these filters 33 and 34 to remove moisture in the refrigerant. It is designed to absorb.

[0020] On the other hand, an inlet is inserted between the upper surface of the flange 36 of the desiccant case 31 and the refrigerant inlet 5. A refrigerant inflow portion of the desiccant case 31 is provided between the inlet conduit 16 and the lower end surface of the desiccant case 31. 37 and a sealing member to prevent refrigerant from leaking between the two. 39 is installed. As a result, the refrigerant flows down from the inlet conduit 16 to the refrigerant inlet section 5. All the refrigerant will be introduced into the refrigerant inlet 37 of the desiccant case 31.

[0021] Note that the refrigerant extraction pipe 7 is a ring-shaped projection formed at the mouth edge of the refrigerant outlet section 6. It is press-fitted into the tank 40 and vertically extends to the vicinity of the bottom surface 2c of the tank body 2.

[0022] Next, the effect will be explained.

[0023] When attaching the desiccant filling section 30 to the liquid tank 20, as shown in FIG. First, the desiccant case is loaded with the desiccant 32 and the filters 33 and 34. A part of the desiccant case 31 is inserted into the refrigerant inlet part 5 of the head part 4 from the bottom of the desiccant case 31. The flange 36 is brought into contact with the stepped portion 35 with the flange 36 exposed inside the tank body 2. (See Figure 1). In this state, the seal member 39 is engaged with the upper surface of the flange 36. Insert it into the refrigerant inlet section 5 as shown. Then, the inlet conduit 16 is installed inside the refrigerant inlet section 5. 2, insert the bolt 21 into the through hole 25 of the inlet conduit 16, and insert the bolt 21 into the screw hole 2 of the head part 4. 6, the installation of the desiccant filling part 30 to the liquid tank 20 is completed. Ru. In this way, liquid can be applied without using crimping methods such as caulking or welding methods. Since the dry tank is equipped with a desiccant filling section, there is no risk of it being affected by pressure or heat. stomach. Therefore, the desiccant will not be cracked, crushed or deformed.

[0024] The liquid tank 20 with the desiccant filling part 30 attached in this way is cooled. When assembled and the compressor is started during the air cycle, the condenser condenses and enters the The refrigerant flowing through the mouth conduit 16 flows into the refrigerant inlet portion 5 of the head portion 4, and the refrigerant is provided here. The desiccant flows into the refrigerant inlet 37 of the desiccant case 31, and the filter installed there After dust is removed by step 33 and water is adsorbed by desiccant 32, the desiccant case is removed. It flows out into the tank body 2 from the many small holes 38 of the base 31 and flows to the bottom of the tank body 2. It will be stored in the department. At this time, the upper surface of the flange 36 and the bottom of the inlet conduit 16 Since the sealing member 39 is installed between the end face and the All of the refrigerant flows into the refrigerant inlet 37 without leaking to the outside at the refrigerant inlet 5. There will be an influx. Therefore, the liquid refrigerant that still contains moisture and dust is stored in the tank. It is not stored within the body part 2. Therefore, the refrigerant is taken out through the refrigerant take-out pipe 7, The refrigerant led from the refrigerant outlet section 6 to the expansion valve via the outlet conduit 17 is free of moisture and dust. Contains only liquid refrigerant.

[0025] Also, when replacing the desiccant 32, loosen the bolt 21 on the inlet pipe 16 side. then remove the inlet conduit 16 together with the O-ring 29 and remove the sealing member 39. After that, by pulling out the desiccant case 31, the desiccant filling part 30 can be easily removed by itself. be able to. Therefore, unlike traditional liquid tanks, liquid tanks There is no need to remove and replace the head or remove the head from the tank body. stomach.

[0026] Furthermore, in this embodiment, the length of the desiccant case in the axial direction is adjusted. Therefore, the amount of desiccant to be filled can be easily increased or decreased. In addition, the desiccant filling section It is now possible to transport the desiccant by itself, and the desiccant filling is also available as a replacement part for the desiccant. Only the filling part needs to be stocked, and only a small stocking space is required.

[0027]

[Effect of the idea]

As mentioned above, according to the liquid tank according to this invention, from the refrigerant inlet All the refrigerant that has flowed in flows through the desiccant filling section to remove moisture and moisture contained in the refrigerant. The dust will be removed, and the liquid refrigerant flowing out from the refrigerant outlet will contain moisture and dust. Only liquid refrigerant is used. Furthermore, only the desiccant filling section can be removed. This makes it easy to replace the desiccant.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view of the same embodiment.

FIG. 3 is a sectional view of a main part showing the installation procedure of the same embodiment.

FIG. 4 is a longitudinal sectional view showing a conventional liquid tank.

[Explanation of symbols]

2...Tank body part, 3...Top opening, 4
...Head part, 5...Refrigerant inlet part, 6...Refrigerant outlet part, 20
...liquid tank, 30...desiccant filling section, 31...desiccant case, 3
2... Desiccant, 33, 34... Filter, 37... Refrigerant inlet, 3
8...Small hole, 39...Sealing member.

Claims (1)

[Scope of utility model registration request] [Claim 1] A cylindrical tank body (2) with a bottom, and a head (4) that closes the upper opening (3) of the tank body (2).
The refrigerant is allowed to flow into the tank body (2) from the refrigerant inlet (5) provided in the head (4), and the liquid refrigerant stored in the lower part of the tank body (2) is transferred to the tank body (2). Head part (4)
In a liquid tank configured to flow out from a refrigerant outlet section (6) provided at the refrigerant inlet section (5), a desiccant filling section (30) facing into the tank body section (2) is removably attached to the refrigerant inlet section (5); A sealing member (39) is provided between the desiccant filling portion (30) and the refrigerant inlet portion (5) to tightly fit the desiccant filling portion (30) into the refrigerant inlet portion (5). The desiccant filling part (30) is interposed with a desiccant case (31) having a bottomed cylindrical shape with a large number of small holes (38), and this desiccant case.
(31), and a filter (33) located at least on the refrigerant inlet (37) side of the desiccant case (31).
A liquid tank characterized by comprising: