A high-precision bimetallic thermometer

Abstract

The present invention belongs to the technical field of temperature measurement equipment, specifically a high-precision bimetallic thermometer. It comprises a dial, a temperature-sensing rod at the lower end of the dial, a mounting sleeve surrounding the rod, and an air circulation channel provided along the radial direction of the rod. Compared to existing technologies, the present invention provides an air circulation channel around the rod, allowing air inside the cabinet to continuously flow toward the upper end of the rod near the dial. Air affected by the external temperature flows back into the cabinet, reducing the distance heat conducts through the metal.

Description

Technical Field

[0001] The invention belongs to the technical field of temperature measuring equipment, and particularly relates to a high-precision bimetallic thermometer. Background Art

[0002] The doors of cabinets, refrigerators, and blood cabinets are relatively thick. The thermometer dial is outside the cabinet and the temperature sensing end is inside the cabinet. The temperature sensing end is too far from the dial, resulting in inaccurate test results. Now the measurement is required to be more refined, and the original thermometer cannot meet the current needs.

[0003] The applicant initially designed to leave a thin gap between the temperature sensing rod and the mounting sleeve, and only seal the contact part between the mounting sleeve and the dial, such as Figure 1 As shown, the gas in the cabinet contacts the upper end of the temperature sensing rod to sense the temperature, shortening the distance between the temperature sensing end and the dial to make the result more accurate. Later, it was discovered that this design was a dead end. The gas in the cabinet only entered but did not exit. On the contrary, due to its proximity to the external environment, the results were interfered with by the external environment. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing thermometer cannot accurately measure the temperature inside a cabinet with thick cabinet doors. In order to solve the above problem, the present invention provides a high-precision bimetallic thermometer.

[0005] The purpose of the present invention is achieved in the following way: a high-precision bimetallic thermometer includes a dial, a temperature sensing rod at the lower end of the dial, a mounting sleeve wrapped around the outside of the temperature sensing rod, and an air circulation channel is set along the radial direction of the temperature sensing rod.

[0006] Furthermore, the air circulation channel is an inlet channel radially close to the wall of the temperature sensing rod, and a return channel away from the temperature sensing rod and close to the outer wall of the mounting sleeve. The inlet channel and the return channel are connected at a position close to the dial.

[0007] Furthermore, at least one of the inlet channel and the return channel is an annular groove.

[0008] Furthermore, at least one of the inlet channel and the return channel is a circumferential array of tubular grooves.

[0009] Furthermore, a sealing plug is provided at the lower end of the outer wall of the mounting sleeve.

[0010] Furthermore, a fastening nut is provided at the lower end of the sealing plug.

[0011] A method for processing a high-precision bimetallic thermometer mounting sleeve, the method comprising the following steps:

[0012] (1) Process an inlet channel on the mounting sleeve that is close to the temperature sensor mounting hole;

[0013] (2) Processing a return channel between the inlet channel and the outer wall of the mounting sleeve on the mounting sleeve;

[0014] (3) Punch holes at the top of the inlet channel and the return channel on the outer wall of the mounting sleeve to connect the inlet channel and the return channel;

[0015] (4) Seal the perforations in the outer wall.

[0016] Furthermore, in steps (1) and (2), the inlet channel and the return channel are processed into annular grooves or tubular grooves by perforation.

[0017] Compared with the existing technology, the present invention sets an air circulation channel around the temperature sensing rod, so that the gas in the cabinet continuously flows to the upper end of the temperature sensing rod close to the dial, and the gas affected by the external temperature will flow back to the cabinet body, reducing the heat conduction distance of the temperature sensing rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the original design of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the present invention;

[0020] Figure 3 An enlarged view of the air circulation channel portion of the present invention;

[0021] Figure 4 AA cross-sectional view and BB cross-sectional view of an embodiment of the present invention;

[0022] Figure 5 AA cross-sectional view and BB cross-sectional view of another embodiment of the present invention;

[0023] Figure 6 Schematic diagram of the structure of the present invention fixed to a cabinet.

[0024] Among them, the dial 1; the temperature sensing rod 11; the installation sleeve 2; the air circulation channel 3; the inlet channel 31; the return channel 32; the connecting channel 33; the sealing plug 4; and the fastening nut 5. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In the present invention, unless otherwise expressly specified and limited, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] Example 1: As shown in the attached Figure 2-6 As shown, a high-precision bimetallic thermometer includes a dial 1, a temperature sensing rod 11 at the lower end of the dial 1, a mounting sleeve 2 wrapped around the outside of the temperature sensing rod 11, and an air circulation channel 3 is set along the radial direction of the temperature sensing rod 11.

[0028] Example 2: This example is a further limitation of Example 1. The air circulation channel 3 is radially close to the outer wall of the temperature sensing rod 11 as the inlet channel 31, and is away from the temperature sensing rod 11 and close to the outer wall of the mounting sleeve 2 as the return channel 32. The inlet channel 31 and the return channel 32 are connected through a connecting channel 33 at a position close to the dial 1.

[0029] A method for processing a high-precision bimetallic thermometer mounting sleeve, the method comprising the following steps:

[0030] (1) Processing an inlet channel 31 on the mounting sleeve 2 to fit closely to the mounting hole of the temperature sensing rod 11;

[0031] (2) Processing a return channel 32 between the inlet channel 31 and the outer wall of the mounting sleeve 2 on the mounting sleeve 2;

[0032] (3) Punch holes at the top of the inlet channel 31 and the return channel 32 on the outer wall of the mounting sleeve 2 to connect the inlet channel 31 and the return channel 32;

[0033] (4) The perforation of the outer wall is sealed, and the inlet channel 31 is connected to the return channel 32 to form a connecting channel 33.

[0034] The mounting sleeve is made of heat-resistant material, preferably ceramic.

[0035] For hot cabinets, a high-precision bimetallic thermometer should be installed on the top of the cabinet, with the end of the temperature sensing rod 11 facing vertically to the ground, so that the hot air in the cabinet enters and rises from the inlet channel 31. After reaching the innermost end of the inlet channel 31, the hot air in the cabinet is in full contact with the upper end of the temperature sensing rod 11 near the dial 1. The hot air then moves to the outer end through the connecting channel 33. Since the return channel 32 is closer to the colder external environment, the temperature of the hot air drops, and the gas with dropped temperature drops back into the cabinet through the return channel 32.

[0036] For cold cabinets, a high-precision bimetallic thermometer should be installed at the bottom of the cabinet, with the end of the temperature sensing rod 11 facing vertically away from the ground, allowing the cold air in the cabinet to enter and descend from the inlet channel 31. After reaching the innermost end of the inlet channel 31, the cold air in the cabinet is in full contact with the upper end of the temperature sensing rod 11 near the dial 1. The cold air then moves to the outer end through the connecting channel 33. Since the return channel 32 is closer to the hotter external environment, the temperature of the cold air rises, and the gas with a lowered temperature rises back into the cabinet through the return channel 32.

[0037] In this way, the air flow inside the thermometer forms a cycle, entering from the inside and exiting from the outside.

[0038] Preferably, the outlet of the reflux channel 32 at the lower end of the mounting sleeve 2 is arranged to face outward, so that the reflux gas is away from the inlet channel 31 .

[0039] Example 3: This example is a further limitation of Example 2, in which at least one of the inlet channel 31 and the return channel 32 is an annular groove.

[0040] A method for processing a high-precision bimetallic thermometer mounting sleeve, characterized in that the processing method comprises the following steps:

[0041] (1) Process an inlet channel on the mounting sleeve that is close to the temperature sensor mounting hole;

[0042] (2) Processing a return channel between the inlet channel and the outer wall of the mounting sleeve on the mounting sleeve;

[0043] (3) Punch holes at the top of the inlet channel and the return channel on the outer wall of the mounting sleeve to connect the inlet channel and the return channel;

[0044] (4) Seal the perforations in the outer wall.

[0045] In steps (1) and (2), the inlet channel and the return channel are processed by processing annular grooves or tubular grooves by perforation.

[0046] Example 4: This example is a further limitation of Example 2, in which at least one of the inlet channel 31 and the return channel 32 is a circumferential array of tubular grooves.

[0047] A method for processing a high-precision bimetallic thermometer mounting sleeve, characterized in that the processing method comprises the following steps:

[0048] (1) Process an inlet channel on the mounting sleeve that is close to the temperature sensor mounting hole;

[0049] (2) Processing a return channel between the inlet channel and the outer wall of the mounting sleeve on the mounting sleeve;

[0050] (3) Punch holes at the top of the inlet channel and the return channel on the outer wall of the mounting sleeve to connect the inlet channel and the return channel;

[0051] (4) Seal the perforations in the outer wall.

[0052] In steps (1) and (2), the inlet channel and the return channel are processed by processing annular grooves or tubular grooves by perforation.

[0053] Figure 4 The middle inlet channel 31 is a circumferential array of tubular grooves, and the return channel 32 is an annular groove; Figure 5 The inlet channel 31 is an annular groove, and the return channel 32 is a circumferential array of tubular grooves. Alternatively, both the inlet channel 31 and the return channel 32 are annular grooves or circumferential arrays of tubular grooves.

[0054] Example 5: This example is a further limitation of Example 3 or 4. A sealing plug 4 is provided at the lower end of the outer wall of the installation sleeve 2 to prevent gas from leaking at the installation hole between the installation sleeve 2 and the cabinet wall.

[0055] Example 6: This example is a further limitation of Example 5. A fastening nut 5 is provided at the lower end of the sealing plug 4 to press the sealing plug 4 against the inner wall of the cabinet.

[0056] When installing, refer to Figure 6 , insert the thermometer from the mounting hole reserved in the cabinet wall, the outer wall of the mounting sleeve 2 contacts the inner wall of the mounting hole, set the sealing plug 4 on the inner wall of the cabinet, and tighten the sealing plug 4 by tightening the nut 5.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, and these should also be regarded as the scope of protection of the present invention.

Claims

1. A high-precision bimetallic thermometer, comprising a dial, a temperature-sensing rod at the lower end of the dial, and a mounting sleeve wrapped around the outside of the temperature-sensing rod, characterized in that: An air circulation channel is provided along the radial direction of the temperature sensing rod; The air circulation channel is radially close to the wall of the temperature sensing rod as the inlet channel, and away from the temperature sensing rod, close to the outer wall of the mounting sleeve as the return channel, and the inlet channel and the return channel are connected at a position close to the dial; For hot cabinets, a high-precision bimetallic thermometer is installed on the cabinet top, with the end of the temperature-sensing rod pointing vertically toward the ground. This allows hot air inside the cabinet to rise from the inlet channel. After reaching the innermost end of the inlet channel, the hot air inside the cabinet fully contacts the upper end of the temperature-sensing rod near the dial. The hot air then moves toward the outer end through the return channel. Because the return channel is closer to the colder external environment, the hot air temperature drops, and the cooled gas descends back into the cabinet through the return channel. For cold cabinets, a high-precision bimetallic thermometer is installed at the bottom of the cabinet, with the end of the temperature-sensing rod facing vertically away from the ground. This allows the cold air inside the cabinet to enter through the inlet channel and descend. After reaching the innermost end of the inlet channel, the cold air inside the cabinet fully contacts the upper end of the temperature-sensing rod near the dial. The cold air then moves to the outer end through the return channel. Because the return channel is closer to the hotter external environment, the cold air temperature rises, and the heated gas rises back into the cabinet through the return channel. At least one of the inlet channel and the return channel is an annular groove; At least one of the inlet channel and the return channel is a circumferential array of tubular grooves.

2. A high-precision bimetallic thermometer according to any one of claim 1, characterized in that: A sealing plug is provided at the lower end of the outer wall of the installation sleeve.

3. A high-precision bimetallic thermometer according to claim 2, characterized in that: A fastening nut is provided at the lower end of the sealing plug.

4. A method for processing a high-precision bimetallic thermometer mounting sleeve according to any one of claims 1 to 3, characterized in that: The processing method comprises the following steps: (1) Process an inlet channel on the mounting sleeve that is close to the temperature sensor mounting hole; (2) Processing a return channel between the inlet channel and the outer wall of the mounting sleeve on the mounting sleeve; (3) Punch holes at the top of the inlet channel and the return channel on the outer wall of the mounting sleeve to connect the inlet channel and the return channel; (4) Seal the perforations in the outer wall.

5. The method for processing a high-precision bimetallic thermometer mounting sleeve according to claim 4, characterized in that: In the steps (1) and (2), the inlet channel and the return channel are processed by processing annular grooves or tubular grooves by perforation.

Images