JPH11201590A - Dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dryer that is the auxiliary equipment of a refrigeration cycle for preventing a desiccant in a dryer body from becoming powder. SOLUTION: A dryer 1 consists of a cylindrical casing 2 with an end face 2a having an outflow port or an inflow port at both edges, a metal wire netting plate 6 that is arranged on an inner wall at one side of the casing 2, a second wire netting plate 8 that is slidably arranged on the inner wall at the other side, a desiccant 10 that is arranged in them, and a coil spring 9 that is arranged between the second wire netting plate 8 for energizing the above second wire netting plate 8 and the end face 2a of the above casing 2. In the dryer 1, an opening that is smaller than the inner edge of the above coil spring 9 is formed at a position that opposes the above first wire netting plate 6 and the second wire netting plate 8, an inner cylinder 7 that is extended from the edge of an opening 6a of the first wire netting plate 6 and is inserted into an opening 8a of the above second wire netting plate 8 is provided, a check valve 3 is arranged at an inner channel 1b of the inner cylinder 7, and the desiccant 10 is arranged at an outer channel 1a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a dryer,
More specifically, the present invention relates to a desiccant powdering prevention structure.

[0002]

FIG. 3 is a sectional view showing an example of a conventional dryer, and FIG. 4 is a refrigerant circuit diagram showing an example of a conventional dryer. In the figure, 11 is a compressor, 12 is a four-way valve, 1
3 is an outdoor heat exchanger, 14 is a capillary, 15 is a dryer, and 16 is an indoor heat exchanger. In the conventional case, a dryer 15 which is an auxiliary device of a refrigeration cycle is covered by a cylindrical casing 2 having an end face 2a having refrigerant outlets 2b and 2c at both ends. On the inner wall on one side of the casing 2, a first wire mesh plate 6 is arranged by an arrangement portion 6b.
Further, a second wire mesh plate 8 fixed by the protrusion 2d and slidably disposed on the inner wall on the other side is provided. And the desiccant 10 is arrange | positioned in those inside.

Further, a coil spring 9 for urging the second wire mesh plate 8 in a direction to press down the desiccant 10 is disposed between the second wire mesh plate 8 and the end face 2a of the casing 2. In this way, the desiccant 2 is filled in the dryer main body 15 in the entire flow path partitioned by the first wire mesh plate 6 and the second wire mesh plate 8. Therefore, the desiccant 2 is exposed to the flow of both the liquid refrigerant and the gas refrigerant by switching between the cooling and heating operations. However, the gas refrigerant having a high flow rate during the cooling operation may cause
When flowing through the inside of the cylinder, the desiccant 10 is powdered, which causes a problem that the compressor 11 and the capillary 14 may be clogged.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned conventional problems, and has as its object to provide a dryer in which the desiccant in the dryer body is prevented from being powdered.

[0005]

In order to achieve the above-mentioned object, in order to achieve the above-mentioned object, the present invention relates to a refrigeration cycle auxiliary device having a tubular casing having an end face having refrigerant outflow and inlet ports at both ends, and an inner wall on one side of the casing. The first wire mesh plate disposed, the second wire mesh plate slidably disposed on the inner wall on the other side, the desiccant disposed therein, and the second wire mesh in a direction of pressing down the desiccant. In a dryer including a coil spring disposed between the second wire mesh plate for urging the wire mesh plate and an end face of the casing, the first wire mesh plate and the second wire mesh plate are arranged along the longitudinal direction of the dryer. An opening smaller than the inner edge of the coil spring is formed at a position opposed to the inner cylinder, an inner cylinder extending from the edge of the opening of the first metal mesh plate and inserted through the opening of the second metal mesh plate is provided. A flow path is formed inside and outside partitioned by the The flow path is disposed a check valve for passing only the refrigerant flow during cooling, so formed by disposing the desiccant to the external flow path.

[0006] The check valve is provided at the end of the inner cylinder on the side of the second wire mesh plate. Also,
The check valve has a small-diameter portion having a small inner diameter at the start end side of the flow path, a large-diameter portion having a large inner diameter at the end side, and a substantially cylindrical shape having a contact surface formed at a boundary thereof. The valve seat includes a valve body that is in contact with the contact surface of the valve seat and is rotatably supported on the inner wall of the large-diameter portion.

[0007] In a vertical type in which the longitudinal direction of the casing is arranged vertically, the inner cylinder is provided at the center. Alternatively, in the case of a horizontal type in which the longitudinal direction of the casing is arranged sideways, the inner cylinder is provided above.

On the other hand, the valve element is constituted by a support shaft at the center, and an upper half portion and a lower half portion whose ends are rotatably supported on the support shaft.

[0009] Alternatively, the valve body may include a support shaft at an upper end and a substantially disk portion having an end portion rotatably supported on the support shaft. Alternatively, the valve element may include a support shaft at a lower end and a substantially semi-disc portion having an end portion rotatably supported on the support shaft.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail based on embodiments with reference to the accompanying drawings. FIG. 1 (a)
Sectional drawing which shows one Example of the dryer by this invention, (b)
Is an exploded perspective view showing a check valve, (c) is a sectional view of a main part, and FIG. 4 is a refrigerant circuit diagram of the air conditioner. Note that FIG. 4 is the same as the conventional case, and the description is omitted. Also, the same reference numerals are used for the same parts as in the conventional example.

In the drawing, 1 is a dryer main body, 1a is an external flow path, 1b is an internal flow path, 2 is a casing, 2a is an end face, 2b is protruding, 3 is a check valve, 4 is a valve seat, and 4a is a small diameter. Part, 4b is a large diameter part, 4c is an abutting surface, 5 is a valve body, 5a is an upper half, 5b is a lower half, 5c is a shaft, 6 is a first wire mesh plate,
6a is an opening, 6b is an arrangement part, 7 is an inner cylinder, 8 is a second wire mesh plate, 8a is an opening, 9 is a coil spring, and 10 is a desiccant. Note that the basic structure of the dryer 1 is substantially the same as that of the conventional example, and the description thereof will be omitted.

According to the present invention, an opening smaller than the inner edge of the coil spring 9 is formed at a position facing the first wire mesh plate 6 and the second wire mesh plate 8 along the longitudinal direction of the dryer 1,
An inner cylinder 7 is provided which extends from the edge of the opening 6 a of the first wire mesh plate 6 and is inserted into the opening 8 a of the second wire mesh plate 8. In addition, a flow path of an external flow path 1a and a flow path of an internal flow path 1b are formed in the inside and the outside partitioned by the inner cylinder 7.

In the case of this embodiment, the dryer 2 is of a vertical type in which the casing 2 of the dryer 1 is arranged in a longitudinal direction. The inner cylinder 7 is provided at the center. A check valve 3 that allows only the refrigerant flow during cooling is provided in the internal flow path 1b of the inner cylinder 7, and the external flow path 1a
Is provided with a desiccant 10. And the check valve 3
Is provided at the end of the inner cylinder 7 on the side of the second wire mesh plate 8.

Next, the check valve 3 will be described.
The check valve 3 includes a valve seat 4 and a valve body 5. The valve seat 4 has a small-diameter portion 4a having a small inner diameter at the start end side of the flow path, a large-diameter portion 4b having a large inner diameter at the end side, and an abutment surface 4c formed at a boundary therebetween. It is cylindrical. On the other hand, the valve element 5 has a support shaft 5c at the center, and an upper half 5a and a lower half 5b whose ends are rotatably supported on the support shaft 5c. The valve seat 4 is in contact with the contact surface 4c, and is rotatably supported by the inner wall of the large diameter portion 4b. In this manner, at the time of heating, the internal flow path 1b, which is the refrigerant flow path, is closed, and is opened by the fluid resistance of the refrigerant at the time of cooling.

Further, copper is used as the material of the valve body 5 of the check valve 3 in order to prevent problems caused by heat during welding.

Next, the operation of the dryer 1 according to the present invention will be described. Since the external flow path 1a is disposed in the peripheral portion, the internal flow path 1b is disposed in the central portion, and the casing 2 of the dryer main body 1 is disposed vertically with the longitudinal direction being mainly vertical.
During cooling, a gas refrigerant having a high flow rate opens the check valve 3 and passes through the internal flow path 1b.

On the other hand, since the check valve 3 does not open to the liquid refrigerant at the time of heating, it passes through the desiccant 10 mainly below the external flow path 1a. For this reason, the gas refrigerant at the time of cooling does not pass through the desiccant 10, and it is possible to prevent the desiccant 10 from being powdered.

FIG. 1D is a sectional view of a main part showing another embodiment. In this case, the valve element 5 is substantially disk-shaped,
A support shaft 5c is provided at the upper end, and the end of the substantially disk portion 5d is rotatably supported on the support shaft 5c.

FIG. 2A is a sectional view showing another embodiment of the dryer according to the present invention, FIG. 2B is an exploded perspective view showing a check valve, and FIG. 2C is a sectional view of a main part. In this embodiment, the dryer 2 is of a horizontal type in which the longitudinal direction of the casing 2 is arranged horizontally. The inner cylinder 7 is provided above, the external flow path 1a is provided below, and the internal flow path 1b is provided above. In this case, the internal flow path 1b has a substantially semicircular cross section, and the valve seat 4 and the valve element 5 constituting the check valve 3 are also formed to have a substantially semicircular cross section. The valve body 5 includes a support shaft 5c at a lower end thereof and a substantially semi-disc portion 5e rotatably supporting an end of the support shaft 5c. It is in contact with the contact surface 4c, and is rotatably supported on the inner wall of the large diameter portion 4b. The operation of this embodiment is the same as that of the above-described embodiment, but since the external flow path 1a is provided below, the liquid refrigerant during heating passes through the desiccant 2 more.

[0020]

As described above, according to the present invention, the auxiliary device of the refrigeration cycle is provided with a cylindrical casing having an end face having a refrigerant outflow port at both ends and an inner wall on one side of the casing. A first wire mesh plate, a second wire mesh plate slidably disposed on the inner wall on the other side, a desiccant disposed therein, and the second wire mesh plate in a direction to press down the desiccant. In a dryer comprising a coil spring disposed between the second wire mesh plate to be urged and the end face of the casing, the first wire mesh plate and the second wire mesh plate face each other along the longitudinal direction of the dryer. An opening smaller than the inner edge of the coil spring is formed at the position, and an inner cylinder extending from the edge of the opening of the first wire mesh plate and inserted through the opening of the second wire mesh plate is provided.
A flow path is formed inside and outside partitioned by the same inner cylinder, a check valve that allows only the refrigerant flow during cooling is disposed in the inner flow path of the inner cylinder, and a desiccant is provided in the outer flow path. It was arranged.

As a result, it is possible to provide a dryer in which the desiccant in the dryer body is prevented from being powdered.

[Brief description of the drawings]

FIG. 1A is a sectional view showing an embodiment of a dryer according to the present invention, FIG. 1B is an exploded perspective view showing a check valve,
(C) is a sectional view of a principal part, and (d) is a sectional view of a principal part showing another embodiment.

2A is a sectional view showing another embodiment of the dryer according to the present invention, FIG. 2B is an exploded perspective view showing a check valve,
(C) is a sectional view of a main part.

FIG. 3 is a sectional view showing an example of a conventional dryer.

FIG. 4 is a refrigerant circuit diagram of an air conditioner of the related art and the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dryer main body 1a External flow path 1b Internal flow path 2 Casing 2a End face 2b Outflow port 2c Outflow port 2d Projection 3 Check valve 4 Valve seat 4a Small diameter part 4b Large diameter part 4c Contact part 5 Valve 5a Upper half 5b Lower Half 5c Support shaft 5d Substantially disk portion 5e Substantially semi-disk portion 6 First wire mesh plate 6a Opening 6b Arrangement portion 7 Inner cylinder 8 Second wire mesh plate 8a Opening 9 Coil spring 10 Desiccant

Claims (8)

[Claims] An auxiliary device for a refrigeration cycle, comprising: a tubular casing having an end face having refrigerant outflow and inlet ports at both ends; a first wire mesh plate disposed on an inner wall on one side of the casing; A second wire mesh plate slidably disposed on the inner wall, a desiccant disposed therein, and the second wire mesh plate for urging the second wire mesh plate in a direction to press down the desiccant; A dryer comprising a coil spring disposed between the casing and an end face of the casing, wherein the inner edge of the coil spring is smaller than an inner edge of the coil spring at a position facing the first wire mesh plate and the second wire mesh plate along a longitudinal direction of the dryer. Forming an opening, providing an inner cylinder extending from the edge of the opening of the first wire mesh plate and inserted through the opening of the second wire mesh plate, forming a flow path inside and outside partitioned by the inner cylinder. Only the refrigerant flow during cooling passes through the internal flow path of the inner cylinder. It arranged a stop valve, dryer, characterized in that formed by disposing the desiccant to the external flow path. 2. The check valve according to claim 1, wherein the check valve is provided at an end of the inner cylinder on the side of the second wire mesh plate.
Dryer as described. 3. The non-return valve has a small-diameter portion having a small inner diameter at the start end side of the flow path, a large-diameter portion having a large internal diameter at the end side, and a contact surface formed at a boundary between the small-diameter portion. And a valve body which is in contact with the contact surface of the valve seat and is rotatably supported on the inner wall of the large diameter portion. The dryer according to claim 1 or 2. 4. The dryer according to claim 1, wherein in a vertical type in which the longitudinal direction of the casing is arranged vertically, the inner cylinder is provided at a center portion. 5. The dryer according to claim 1, wherein in a horizontal type in which the longitudinal direction of the casing is arranged sideways, the inner cylinder is provided at an upper side. 6. The dryer according to claim 4, wherein the valve element comprises a support shaft at the center, and an upper half portion and a lower half portion whose ends are rotatably supported on the support shaft. . 7. The dryer according to claim 4, wherein the valve element comprises a support shaft at an upper end, and a substantially disk portion having an end portion rotatably supported on the support shaft. 8. The dryer according to claim 5, wherein the valve element comprises a support shaft at a lower end, and a substantially semi-disc portion having an end portion rotatably supported on the support shaft.