JPH0227243A - Thermostat - Google Patents

Abstract

PURPOSE:To enable prevention of a leakage of a thermal gas within a thermostat for a long time by providing an elastic sheet thermal seal section which is supported with a thermostat door to contact the body of the thermostat under an elastic return force at the closure of the door. CONSTITUTION:Thermal gas sheet sections 7 and 81 are provided between a body 1 and a door 6. The seal section 81 comprises a stainless steel sheet and one end 811 thereof is screwed down on a door vertical surface 61 while the other end 812 thereof is brought into contact slidably with a door tilt surface 62 with an intermediate part 813 lifted from a door surface. When the door is closed, the seal section 81 gets in contact with a corner 10 at which a body vertical surface 1 crosses an inclined surface 12 being deflected under an elastic return force to prevent a leakage of the thermal gas at the part. With such an arrangement, at the closure of the door, the seal sections 7 and 81 get in contact with the body to prevent a leakage of the thermal gas. Thus, the seal section 81 comprising the elastic stainless steel sheet will not break easily though the seal 7 is broken while the opening and closing of the door 6 is repeated with a repeated use of the thermostat and a continued thermal sealing is made possible as desired.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a constant temperature chamber for performing heat resistance tests, heat treatments, etc. on various products, their parts, and various materials.

[Prior Art] Conventionally, this type of incubator is equipped with the following sealing means in order to prevent high-temperature gas inside the incubator from leaking out between the incubator door and the main body. That is, as shown in FIG. 10, a high-temperature heat-resistant gasket S1 made of glass fiber or ceramic fiber wrapped with ceramic paper, ceramic cloth, or stainless steel mesh is placed around the inner surface of the incubator door 6, and screws are installed. In addition to fixing with rivets etc., a sealing material S2 made of silicone rubber etc. with a relatively low heat resistance temperature is additionally provided on the outer peripheral part of the gasket Sl, and when the door 6 is closed, the gasket S1 and the sealing material S2 are attached to the main body of the incubator. 1. ■ A string gasket made of ceramic fiber or glass fiber is used instead of the gasket SI shown in Figure 10. ■ A door 6 and the main body as shown in Figure 11. This prevents hot air from leaking by reducing the gap G between the opposing surfaces of l.

[Problems to be Solved by the Invention] However, since the gaskets in the sealing means of (1) and (2) do not themselves have elasticity, there is a problem that they are gradually compressed and damaged when the door is repeatedly opened and closed. A problem with these gaskets is that they are expensive.

In the case of the above sealing means (■), precise assembly and adjustment are required in order to maintain the specified gap between the door 6 and the main body 1, and this work is extremely time-consuming, and the mating surfaces of the door and the main body are Since they are close to each other, directly facing each other, there is a risk that the mating surfaces may be damaged during use of the incubator, reducing the sealing effect. Moreover, of course, considerable leakage of hot air must be tolerated, which cannot be completely prevented.

Therefore, the present invention provides a hot air seal section provided between the door and the main body of the thermostat, which is not easily damaged like the gas get in conventional thermostats even when the door is repeatedly opened and closed.
It has the same level of heat resistance as the gasket, and can prevent leakage of hot air inside the thermostat to a practically satisfactory degree over a long period of time.
Furthermore, it is possible to provide a thermostatic chamber equipped with a sealing part that is inexpensive and does not require as much precision to assemble the door to the main body, compared to the case where the gap between the door and the main body is made small and a hot air seal is used. purpose.

[Means for Solving the Problem] According to the above-mentioned object, the present invention provides an elastic thin plate that is supported by either the door of the incubator or the main body of the incubator, and that contacts the other of the door and the main body under an elastic restoring force when the door is closed. The present invention provides a thermostatic chamber characterized by having a hot air sealing section made of molded air.

Examples of the elastic thin plate forming the hot air sealing portion include various elastic metal thin plates (for example, stainless steel thin plates), and thin plates or membranes made of carbon fiber.

In order to increase the sealing effect, the seal part may be formed and supported so that, for example, when the door is closed, the gas inside the thermostatic chamber enters inside the seal part and is pressed against the door or the main body under the atmospheric pressure.

[Function] According to the incubator of the present invention, when the door is closed, the hot air seal portion supported by either the door or the main body is slightly bent or deformed while being subjected to an elastic restoring force on the other of the door and the main body. to prevent the high temperature gas inside the thermostat from leaking to the outside.

When the gas inside the thermostat enters into the inside of the seal portion when the door is closed, in addition to the elastic restoring force, the atmospheric pressure also contributes to the pressing contact of the seal portion.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic cross section of an embodiment of the thermostat, and FIG. 2 shows an enlarged view of the seal between the door and the thermostat body.

This thermostat is equipped with a thermostat 2 in the main body 1, a heater 3 and a blower 4, and the heating temperature is 500~700''C.
The high-temperature gas heated above or above is circulated in the tank by operating the blower 4.

The main body opening 5 is opened and closed by a door 6 hinged to the main body.

The front surface of the main body 1, which borders the opening 5, is composed of a vertical surface 11, an inclined surface 12 extending inward from the core, and a vertical surface 13 continuous with the inclined surface.

Further, the inner surface of the door includes a vertical surface 61, an inclined surface 62, and a vertical surface 63, which face the vertical surface 11, inclined surface 12, and vertical surface 13 of the main body, respectively.

There are two hot air seals 7 and 81 between the main body 1 and the door 6.
is provided.

The seal portion 7 is similar to the conventional gasket Sl,
It consists of a high temperature heat resistant gasket made of ceramic fibers or glass fibers wrapped in ceramic vapor or stainless steel mesh (in this example, ceramic fibers are wrapped in stainless steel mesh).

This seal portion 7 is attached to a door surface 63 so as to surround the main body opening 5.
It is provided around the entire circumference and comes into contact with the vertical surface 13 of the main body when the door is closed, thereby preventing hot air leakage.

As shown in FIG. 2, the seal part 81 is made of a thin stainless steel plate, one end 811 is screwed to the door vertical surface 61, and the other end 812 is tilted for safety so that the knife effect cannot be exerted. It is slidably brought into contact with surface 62. The middle portion 813 is floating above the door surface.

When the door is closed, the seal portion 81 is bent and contacts the corner portion 10 where the vertical surface 11 of the main body and the inclined surface 12 intersect under elastic restoring force, thereby preventing hot air from leaking from that portion.

The seal part 81 is provided all around the inner surface of the door so as to surround the main body opening 5, but as shown in FIG. It is calculated and cut in advance so as to form exactly the seal line L when pressed against the sheet.

In addition, in a thermostat that allows some hot air leakage,
It is not always necessary to form such a seal line L, and leakage of hot air from the meeting portion may be allowed. However, from a JilQ perspective, it is desirable that the locations where hot air is allowed be within a range that does not pose a danger to the person handling the thermostat.

According to the thermostat, when the door is closed, the seals 7 and 81 come into contact with the main body to prevent hot air from leaking. Even if the seal part 7 is damaged as the door 6 is repeatedly opened and closed by repeated use of the thermostat, the seal part 81 made of a thin elastic stainless steel plate will not be easily damaged, and the desired hot air sealing will continue to be performed. I can do it.

In place of the hot air seal portion 81, other types of hot air seal portions may also be employed. Examples are shown in FIGS. 4 to 9. Note that all of these seal portions are formed from stainless steel thin plates.

The seal portion 82 in FIG. 4 has one end 821 fixed to the door sloping surface 62 and has a cross section in the shape of an "E" or "<" shape, so that the chevron-shaped bent portion 822 can come into contact with the main body sloping surface 12. .

The seal portion 83 in FIG. 5 has one end 831 fixed to the door slope 62 and the other end 832 capable of contacting the main body slope 12 with the road surface.

The seal portion 84 in FIG. 6 has a circular cross section, and one end 84 has a circular cross section.
41 is fixed to the door slope 62, and when the door is closed, the main body slope 1
You can contact 2.

The seal portion 85 shown in FIG. 7 has a circular cross section, and both end portions 851 and 852 are fixed to the door inclined surface 62 and can come into contact with the main body inclined surface 12 when the door is closed.

The seal portion shown in FIGS. 4 to 7 may be provided in other parts, for example, on the door vertical surface 61 so as to contact the main body vertical surface 11.

The seal portion 86 in FIG. 8 has a J-shaped cross section, one end 861 is fixed to the door vertical surface 61, and the other end is in slidable contact with the same surface. The seal portion fits into a recess 111 provided in the vertical surface 11 of the main body when the door is closed.

The seal portion 87 in FIG. 9 has a circular cross section, and one end 87 has a circular cross section.
71 is fixed to the door vertical surface 61, and can fit into and come into contact with a recess 112 provided in the main body vertical surface 11 when the door is closed.

The seal portions shown in FIGS. 8 and 9 can also be provided in other parts, for example, on the door slope 62. In this case, a fitting recess for the seal portion is provided in the main body slope 12.

The seal portions shown in FIGS. 4 to 9, particularly the seal portions shown in FIGS. 4, 5, and 9, are such that the gas inside the thermostat at a higher pressure P than the outside air enters the inside of the seal portion and acts on the seal portions shown in FIGS. 4 to 9. This is advantageous because it is further pressed against the main body surface and the -layer sealing condition becomes better.

Note that the present invention is not limited to the above embodiments,
It can also be implemented in various other ways.

For example, in each of the embodiments described above, the seal portion is supported by the door 6, but it may be supported by the main body l side.

〔Effect of the invention〕

According to the present invention, the hot air seal part provided between the door and the thermostat body does not easily break like the gasket in conventional thermostats even when the door is repeatedly opened and closed.
It has the same level of heat resistance as the gasket, and can prevent leakage of hot air inside the thermostat to a practically satisfactory degree over a long period of time.
In addition, it is possible to provide a thermostat equipped with a sealing part that is inexpensive and does not require as much precision to assemble the door to the main body, compared to the case where the gap between the door and the main body is made small and a hot air seal is used. can.

Further, when the seal part is arranged such that the gas inside the thermostat enters into the inside thereof when the door is closed and is pressed against the door or the main body under the atmospheric pressure, leakage of the hot air inside the thermostat can be reliably prevented.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of one embodiment of the present invention, and FIG.
Fig. 3 is an explanatory diagram of the sealed state of the sealing part where the horizontal and vertical parts of the seal part made of elastic thin plate meet, and Figs. Explanatory diagrams of other examples of the seal part, FIGS. 10 and 11
Each figure is an explanatory diagram of a conventional example. 1... Main body of thermostat, 6... Door, 81-87... Hot air sealing part made of elastic thin plate. Applicant Tabai Espec Co., Ltd.

Claims (2)

[Claims] (1) An incubator characterized by being equipped with a hot air seal made of an elastic thin plate that is supported by either the incubator door or the incubator body and comes into contact with the other of the door and the incubator body under elastic restoring force when the door is closed. . (2) The incubator according to claim 1, wherein the seal portion is formed and supported so that gas within the incubator enters inside the seal portion when the door is closed, and is pressed against the other of the door and the main body under the atmospheric pressure.