JP6249727B2 - Sight Glass - Google Patents

Description

  The present invention relates to a sight glass, and more particularly to a sight glass used for detecting moisture present in a refrigerant of a refrigeration cycle.

  Conventionally, a sight glass containing a moisture indicator for detecting moisture in the refrigerant has been used because moisture in the refrigerant of the refrigeration cycle may lead to failure of the compressor.

For example, as shown in FIG. 4, the sight glass is disposed between the pipes 31 and 32 of the refrigeration circuit, the main body 22 through which the refrigerant C passes, the moisture indicator 23 that detects moisture in the refrigerant C, First and second support members 24, 25 that sandwich the moisture indicator 23, a glass attachment member 27 that is attached to the upper opening 22 c of the main body 22 and sandwiches the first support member 24 with the main body 22, and a glass attachment member 27 And a glass 26 attached to. According to the sight glass 21, it is possible to confirm the presence of water by observing the color of the upper surface of the moisture indicator 23 through the glass 2 6.

  Moreover, as a label affixed on the circumference | surroundings of the said glass 26 (upper surface of the glass attachment member 27), as described in patent document 1, the ring-shaped thing (ring-shaped thing) in which the hole was formed in the part corresponding to the glass 26 is mentioned. Sheet) is registered as a design. Here, the ring-shaped portion of the label is divided into a portion indicated by “DRY” and a portion indicated by “WET”, and the “DRY” portion contains moisture in the refrigerant C. The color of the moisture indicator 23 when it does not exist (original color, for example, green) is colored, and the “WET” portion changes color when the moisture indicator 23 detects that moisture is present in the refrigerant C ( For example, yellow) is colored. The operator confirms the presence of moisture contained in the refrigerant passing through the sight glass by comparing the color of the moisture indicator 23 with the colors colored in the “DRY” portion and the “WET” portion. Is possible.

Design Registration No. 1438712

  However, since the label is formed in a ring shape, it is deformed when it is peeled off from the mount (release paper), or deformed when it is applied around the glass 26 of the sight glass 21, and it is re-applied many times. There was a problem that pasting work was not easy. In addition, when the temperature difference between the inside and outside of the sight glass is large, the surface of the glass 26 may be clouded by water vapor, or dirt or dirt may adhere to the surface of the glass 26.

  Further, if the glass 26 is damaged when the sight glass is installed, during maintenance, or when the moisture indicator is visually recognized, there is a concern that the visibility may be similarly lowered.

  Further, depending on the angle at which the glass 26 is looked into, sunlight and light from the electric light are reflected, and the visibility of the moisture indicator is similarly reduced.

  Then, this invention is made | formed in view of the problem in the said prior art, Comprising: A label (seal | sticker) is easy to stick and it aims at preventing the fall of the visibility of the glass of a sight glass.

In order to achieve the above object, a sight glass of the present invention has a fluid inlet and outlet, a body through which the fluid flows, a moisture indicator for detecting moisture in the fluid, and a body. A transparent member for covering the formed opening and for visually recognizing the moisture indicator from the outside of the main body, and a transparent seal affixed to the transparent member and having no holes larger than the transparent member , To do.

According to the present invention, it is possible to protect the surface of the transparent member by applying a transparent seal without a hole to the transparent member, and to prevent the transparent member from being damaged. In addition, even when water vapor adheres to the surface of the transparent member and becomes cloudy, or when dirt or dirt adheres, it can be easily wiped off, and a reduction in visibility can be prevented. Furthermore, by forming the transparent seal larger than the transparent member, the transparent seal can be reliably attached to the entire surface of the transparent member.

  In addition, if the surface of the transparent seal is rougher than the surface of the transparent member, it is possible to reduce a decrease in visibility due to the reflection of sunlight or light from an electric lamp.

  Furthermore, in order to apply a transparent seal without a hole to the transparent member covering the opening formed in the main body, the transparent seal is deformed when peeled off from the mount, or deformed when applied, resulting in a deviation of the applying position. Affixing can be performed reliably and easily without reapplying again and again.

  In the sight glass, a comparison display unit that displays colors before and after the moisture indicator detects moisture can be provided on the outer periphery of the transparent seal. Thereby, when an operator confirms the presence of moisture, a determination can be easily made.

  In addition, if the adhesive provided on the back side of the transparent seal is made removable from the transparent member, it can be easily replaced even if the transparent seal is damaged or dirty, and maintenance of the sight glass is easy. It is.

  As described above, according to the sight glass of the present invention, a label (seal) can be easily attached, and breakage of glass and deterioration of visibility can be prevented.

It is a top view which shows one Embodiment of the sight glass concerning this invention. It is the sectional view on the AA line of the sight glass of FIG. It is a partially broken enlarged view of the sight glass of FIG. It is sectional drawing which shows an example of the conventional sight glass.

  Next, embodiments for carrying out the present invention will be described in detail with reference to the drawings. In the following description, a case where the sight glass according to the present invention is used for detecting moisture present in the refrigerant of the refrigeration cycle will be described as an example.

  1 to 3 show an embodiment of a sight glass according to the present invention. This sight glass 1 includes a main body 2 through which a refrigerant C passes through an interior 2d, and a moisture indicator 3 for detecting moisture in the refrigerant C. A first and second support members 4 and 5 that sandwich the moisture indicator 3; a glass attachment member 7 that is attached to the upper opening 2c of the main body 2 and sandwiches the first support member 4 with the main body 2; and a glass attachment The glass 6 mounted on the member 7 is disposed between the pipes 11 and 12 of the refrigeration circuit.

  Pipes 11 and 12 are connected to the inlet 2 a and the outlet 2 b of the main body 2, respectively, and the refrigerant C flows from the pipe 11 toward the pipe 12. The upper part of the main body 2 is opened, and the glass 6 is held around the upper opening 2c by the glass mounting member 7 so as to cover the upper opening 2c.

  A seal 10 is affixed to the upper surfaces of the glass 6 and the glass attachment member 7. This seal 10 is formed into a circular shape without holes using a resin sheet such as thin plastic or vinyl having flexibility, and a portion corresponding to the upper surface of the glass 6 has a transparent portion 10a, Furthermore, the part corresponding to the upper surface of the glass attachment member 7 around the transparent part 10a is a comparison display part 10b for facilitating the judgment when the operator confirms the presence of moisture. A transparent adhesive is applied or provided on the back surface of the seal 10, and the seal 10 is attached to the upper surfaces of the glass 6 and the glass mounting member 7 through the adhesive.

  Since the seal 10 is not provided with a hole, it is not deformed even if it is peeled off from the mount, and can be reliably attached to a predetermined position on the upper surface of the glass mounting member 7.

  The transparent portion 10a protects the surface of the glass 6 and prevents the glass 6 from being damaged while making the moisture indicator 3 visible through the glass 6 from the outside. Further, by providing the transparent portion 10a, it is possible to easily wipe off the surface of the glass 6 even when the surface of the glass 6 becomes cloudy or dirt or dirt adheres to it, so that a reduction in visibility can be prevented.

  Further, if the adhesive provided on the back surface of the seal is made detachable from the glass mounting member 7, it can be easily replaced even if the seal 10 is damaged or dirty, and maintenance of the sight glass can be performed. Easy.

  The color of the “WET” portion of the comparison display portion 10 b corresponds to the color that changes when the moisture indicator 3 detects the presence of moisture in the refrigerant C, and the color of the “DRY” portion is the color of the moisture indicator 3. Corresponds to the original color. Thereby, it is possible to easily determine whether or not moisture is present in the refrigerant C.

  The moisture indicator 3 is made of disk-shaped paper or the like, and is discolored by moisture in the refrigerant C that has come into contact. The moisture indicator 3 can be visually confirmed through the glass 6 and the seal 10 to confirm the presence of moisture. it can.

  The first support member 4 is provided to support the moisture indicator 3 from below, and includes a recess or the like for accommodating the moisture indicator 3. The second support member 5 is provided to press and hold the moisture indicator 3 housed in the recess of the first support member 4 from above. Both the supporting members are supported in a state where the upper surface of the moisture indicator 3 is exposed.

  Since the conventional label shown in Patent Document 1 is composed of only a ring-shaped comparison display portion, it has been difficult to apply the sticker 10 due to deformation or the like when it is applied to the periphery of the glass. By forming a circular shape composed of 10a and the comparison display portion 10b, it becomes difficult to be deformed, and the pasting work is facilitated. In addition, the comparison display part 10b does not necessarily need to be provided and it is good also as the seal | sticker 10 which consists only of the transparent part 10a. Regardless of whether or not the comparison display unit 10b is provided, the shape of the entire seal 10 is not limited to a circle but may be an ellipse or a polygon as long as the shape is not a ring or frame with a hole.

  In the above embodiment, the case where the sight glass 1 according to the present invention is used for detecting moisture present in the refrigerant of the refrigeration cycle is illustrated, but the moisture in the fluid used for other applications is exemplified. It can also be applied to detection.

DESCRIPTION OF SYMBOLS 1 Sight glass 2 Main body 2a Inlet 2b Outlet 2c Upper opening 2d Inside 3 Moisture indicator 4 First support member 5 Second support member 6 Glass 7 Glass mounting member 10 Seal 10a Transparent part 10b Comparison display part 11 Pipe 12 Pipe C Refrigerant

Claims (3)

A main body having an inlet and an outlet for fluid, and through which the fluid flows;
A moisture indicator for detecting moisture in the fluid;
A transparent member for covering the opening formed in the main body and for visually recognizing the moisture indicator from the outside of the main body;
A sight glass comprising a transparent seal affixed to the transparent member and having no holes larger than the transparent member .   2. The sight glass according to claim 1, further comprising a comparison display unit that displays colors before and after the moisture indicator detects moisture on an outer periphery of the transparent seal. The transparent seal, sight glass according to claim 1 or 2, characterized in that it is replaceably attached to the transparent member.

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