A fast-response temperature sensor

Abstract

The invention provides a fast-response temperature sensor, comprising: a sealed housing, a metal frame, a platinum wire winding, and a connecting block; the connecting block is provided with a metal frame, the metal frame is cylindrical, and a permeable hole is provided in the connecting block, which is connected to the metal frame; the platinum wire winding is wound on the metal frame, the sealed housing is cylindrical, and is sleeved on the outside of the platinum wire winding and the metal frame; the platinum wire winding senses the airflow temperature outside the sealed housing and inside the metal frame. It is more optimized than the previous temperature sensor (wound with platinum wire winding), has a faster response time, and can be designed with redundancy, so that the probe length can be shorter.

Description

Technical Field

[0001] The invention relates to the technical field of temperature detection sensor development, and in particular to a fast-response temperature sensor. Background Art

[0002] At present, the installation methods of platinum resistance of temperature sensors can be roughly divided into two situations:

[0003] a) The first situation is: a ceramic platinum resistor is sealed inside a metal temperature probe. The temperature probe is made of stainless steel or brass, etc., and the filling material is aluminum oxide or magnesium oxide. Due to the limitation of its structure, the platinum resistor cannot directly contact the heat source, and the thermal resistance is large. This installation method has a long temperature response time.

[0004] b) The second situation is: the temperature probe is a split structure, which consists of a middle tube core and a shell. The middle tube core is made of insulating material. The tube core can be wrapped with a platinum resistance wire and placed at the bottom of the shell. The filling material is aluminum oxide or magnesium oxide. This installation method has a short temperature response time, and has high requirements on the probe length and processability, and cannot be designed with redundancy. Summary of the invention

[0005] The invention provides a fast-response temperature sensor with a faster response time.

[0006] The present invention provides a fast-response temperature sensor, comprising: a sealed housing, a metal frame, a platinum wire winding, and a connecting block;

[0007] The connection block is provided with a metal frame, which is cylindrical in shape, and a vent hole is provided in the connection block, which is connected with the metal frame;

[0008] The platinum wire winding is wound on the metal frame, and the sealed shell is cylindrical and is sleeved on the outside of the platinum wire winding and the metal frame;

[0009] Platinum wire windings sense the temperature of the airflow outside the sealed housing and inside the metal frame.

[0010] Optionally, a plurality of metal frames are provided on the connection block, and a platinum wire winding is wound around each metal frame;

[0011] The platinum wire windings are fully or partially connected in series / parallel.

[0012] Optionally, the platinum wire winding is coated with an insulating film on the outside;

[0013] Multiple layers of platinum wire windings are wound around the metal frame, and each turn of platinum wire fits tightly.

[0014] Optionally, the fast-response temperature sensor further comprises: a mounting interface, a circuit board assembly;

[0015] The connection block is provided with a wire hole for the platinum wire winding to pass through, and the connection block is connected to the circuit board assembly through a mounting interface;

[0016] An insulating block is provided in the installation interface, and a wire through hole is provided in the insulating block;

[0017] The platinum wire winding passes through the wire through hole and is welded to the wire led out of the circuit board component and passed through the wire through hole. Ceramic glue or epoxy resin glue is filled in the connection block and the installation interface.

[0018] Optionally, the insulating block is fixed to the connecting block by mounting screws.

[0019] Optionally, the fast-response temperature sensor further comprises: a mounting block;

[0020] The mounting block is arranged on one side of the connection block having the metal frame, and is welded to the connection block and the metal frame.

[0021] Optionally, the platinum wire winding on the metal frame is fixed by ceramic glue or epoxy resin glue.

[0022] Optionally, the thickness of the metal frame and the sealed shell is within 0.2 mm.

[0023] The invention provides a fast-response temperature sensor, comprising: a sealed housing, a metal frame, a platinum wire winding, and a connecting block; the connecting block is provided with a metal frame, the metal frame is cylindrical, and a permeable hole is provided in the connecting block, which is connected to the metal frame; the platinum wire winding is wound on the metal frame, the sealed housing is cylindrical, and is sleeved on the outside of the platinum wire winding and the metal frame; the platinum wire winding senses the airflow temperature outside the sealed housing and inside the metal frame. It is more optimized than the previous temperature sensor (wound with platinum wire winding), has a faster response time, and can be designed with redundancy, so that the probe length can be shorter. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 An exploded schematic diagram of a fast-response temperature sensor provided by the present invention;

[0025] Figure 2 A schematic diagram of the installation of a fast-response temperature sensor provided by the present invention;

[0026] Description of reference numerals:

[0027] 1- Sealed housing;

[0028] 2-Mounting block;

[0029] 3-Metal skeleton and platinum wire winding;

[0030] 4-Connection block;

[0031] 5- first insulating block;

[0032] 6- second insulating block;

[0033] 7-Installation interface;

[0034] 8-Circuit board assembly;

[0035] 9- housing;

[0036] 10-Connector. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 work are within the scope of protection of the present invention.

[0038] The features and illustrative embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is by no means limited to any specific settings and methods proposed below, but covers any improvements, replacements and modifications of structures, methods, devices without departing from the spirit of the present invention. In the accompanying drawings and the following description, known structures and technologies are not shown to avoid unnecessary ambiguity in the present invention.

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other, and the embodiments can refer to and quote each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] The present invention is further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0041] like Figure 1 and Figure 2 As shown, the temperature sensor provided by the present invention includes: a sealed housing 1, a mounting block 2, a metal frame and a platinum wire winding 3, a connecting block 4, a first insulating block 5, a second insulating block 6, a mounting interface 7, a circuit board assembly 8, a housing 9, and a connector 10.

[0042] Three groups of platinum wire windings are used as sensitive elements to sense the ambient temperature. The platinum resistance wire is wound on a metal frame. An insulating film (polyimide film) is coated on the outside of the platinum resistance wire to insulate it from the metal frame.

[0043] A temperature sensing hole is designed in the middle of the metal frame, and a sealed shell is designed outside the metal frame. The thickness of the metal frame and the sealed shell is within 0.2mm, which is convenient for rapid temperature sensing. The three sets of metal frames and sealed shells are welded to the mounting block and the connecting block respectively. The metal frame and the sealed shell form an annular sealed cavity. The platinum resistance wire (platinum wire winding) passes through the shell and the metal frame through-hole, and the inner and outer sides and the front end sense the ambient temperature at the same time, and the response time is faster.

[0044] The connection block is designed with air-permeable vias, which are connected with the metal frame vias to ensure that the medium quickly passes through the metal frame vias.

[0045] The platinum resistance wire (platinum wire winding) on ​​the metal frame is fixed by ceramic glue or epoxy resin glue. The platinum resistance wire passes through the connecting block, and the lead wire is welded at the wire through-hole position between the first insulating block and the second insulating block. The wire welding position is fixed by ceramic glue or epoxy resin glue, and the first insulating block and the second insulating block are fixed by mounting screws.

[0046] Three groups of platinum resistance wires (platinum wire windings) can be connected in parallel to form three groups of independent temperature measuring resistors, and can also be connected in series to form one or two groups of temperature measuring resistors to meet the requirements of short temperature probes and large resistance values.

[0047] The connecting block is welded to the mounting interface by laser welding or electron beam welding, and the lead wire is welded to the circuit board assembly.

[0048] The above is only a specific embodiment of the present invention, and the present invention is described in detail. The unexplained part is a conventional technology. However, the protection scope of the present invention is not limited to this. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A fast-response temperature sensor, characterized in that: include: Sealed housing, metal frame, platinum wire winding, connection block; The connection block is provided with a metal frame, which is cylindrical in shape, and a vent hole is provided in the connection block, which is connected with the metal frame; The platinum wire winding is wound on the metal frame, and the sealed shell is cylindrical and is sleeved on the outside of the platinum wire winding and the metal frame; Platinum wire windings sense the temperature of the airflow outside the sealed housing and inside the metal frame.

2. The fast-response temperature sensor according to claim 1, characterized in that: A plurality of metal frames are arranged on the connection block, and a platinum wire winding is wound around each metal frame; The platinum wire windings are fully or partially connected in series / parallel.

3. The fast-response temperature sensor according to claim 1, characterized in that: The platinum wire winding is coated with an insulating film on the outside; Multiple layers of platinum wire windings are wound around the metal frame, and each turn of platinum wire fits tightly.

4. The fast-response temperature sensor according to claim 1, characterized in that: Also includes: Install interfaces and circuit board components; The connection block is provided with a wire hole for the platinum wire winding to pass through, and the connection block is connected to the circuit board assembly through a mounting interface; An insulating block is provided in the installation interface, and a wire through hole is provided in the insulating block; The platinum wire winding passes through the wire through hole and is welded to the wire led out of the circuit board component and passed through the wire through hole. Ceramic glue or epoxy resin glue is filled in the connection block and the installation interface.

5. The fast-response temperature sensor according to claim 4, characterized in that: The insulating block is fixed to the connecting block by means of mounting screws.

6. The fast-response temperature sensor according to claim 1, characterized in that: Also includes: Mounting blocks; The mounting block is arranged on one side of the connection block having the metal frame, and is welded to the connection block and the metal frame.

7. The fast-response temperature sensor according to claim 1, characterized in that: The platinum wire winding on the metal frame is fixed by ceramic glue or epoxy resin glue.

8. The fast-response temperature sensor according to claim 1, characterized in that: The thickness of the metal frame and the sealed shell is within 0.2mm.

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