CN213422472U

CN213422472U - Liquid temperature detecting device

Info

Publication number: CN213422472U
Application number: CN202022446367.XU
Authority: CN
Inventors: 李宁; 周祥勋
Original assignee: NINGBO AIJIA ELECTRICAL APPLIANCE CO Ltd
Current assignee: NINGBO AIJIA ELECTRICAL APPLIANCE CO Ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2021-06-11
Anticipated expiration: 2030-10-28

Abstract

The utility model relates to a liquid temperature detection device, include: the temperature measuring device comprises a shell, a temperature measuring device and a temperature measuring device, wherein the shell is provided with a liquid inlet joint, a liquid outlet joint and a temperature measuring cavity formed by hollowing inside, and the liquid inlet joint and the liquid outlet joint are both communicated with the temperature measuring cavity through fluid; the temperature sensor assembly is arranged on the shell and is provided with a temperature measuring end, and the temperature measuring end can extend into the temperature measuring cavity of the shell. The liquid temperature detecting device is simple in structure and low in cost, when the liquid temperature detecting device is used, the liquid inlet joint and the liquid outlet joint of the shell are directly communicated with a pipeline to be measured, and the assembling process is very convenient and fast. On the other hand, the temperature measuring end of the temperature sensor assembly is directly contacted with the flowing liquid in the pipeline, so that the temperature detection is more stable and accurate. The liquid temperature detecting device has strong universality and is suitable for various products needing to detect the water temperature of the liquid inlet and the liquid outlet, such as coffee machines and direct drinking machines.

Description

Liquid temperature detecting device

Technical Field

The utility model relates to a temperature-detecting equipment technical field especially relates to a liquid temperature detection device.

Background

The temperature sensor is a sensor which can sense temperature and convert the temperature into a usable output signal, is a core part of a temperature measuring instrument, has various varieties, can be divided into two types of contact and non-contact according to a measuring mode, and is divided into two types of thermal resistance and thermocouple according to sensor materials and electronic element characteristics.

For example, chinese utility model patent with application number CN201520902799.3 (publication number CN205120268U) discloses "an NTC temperature sensor", which includes a metal shell, a thermistor, a pin, epoxy resin, a heat-shrinkable tube and an insulating sleeve; the thermistor is arranged in the metal shell, and epoxy resin is filled between the thermistor and the metal shell; the pin is connected to the thermistor, the pin part extends out of the metal shell, and the outside of the pin is wrapped with an insulating sleeve; filling epoxy resin between the pins and the metal shell; the thermal shrinkage pipe is sleeved at the opening of the metal shell; the metal shell is T-shaped; the NTC temperature sensor also comprises a pipe clamp which is made of elastic material; the pipe clamp is provided with a hole for the T-shaped pin of the metal shell to pass through. When the pipe clamp is used, pipe clamps with different sizes are selected according to different pipes, the T-shaped foot part of the metal shell penetrates through the hole of the pipe clamp, then the pipe clamp is clamped on the pipe, the pipe clamp can clamp the pipe due to the elasticity of the pipe clamp, the top of the metal shell is tightly attached to the pipe, heat on the pipe can be transmitted to the metal shell, and a detected signal is transmitted out through the thermistor. However, the clamp-type NTC temperature sensor still has certain disadvantages in practical application, and although the top of the metal shell for heat conduction is tightly attached to the pipe and can transfer heat to the thermistor in the metal shell, the actual temperature of the liquid in the pipe and the temperature detected by the thermistor in the metal shell still have certain difference, the accuracy of temperature detection is not high, and particularly under the condition that the inner wall of the water flow pipe is scaled, the difference of temperature measurement is larger.

In order to ensure the accuracy of measuring the temperature of liquid in a pipeline, the conventional contact temperature measurement mode is generally that a screw hole is formed in a liquid channel, an immersion type temperature probe is installed in the screw hole through threaded connection, and the detection end of the temperature probe extends into the liquid. Although the mode can detect the outlet water temperature of the bath water, the installation process is complex, the cost is high, the tightness between the screw hole and the temperature probe is difficult to ensure, and the water leakage phenomenon is easy to occur.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to prior art's current situation, provide a simple to operate, liquid temperature detection device with low costs.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a liquid temperature sensing device comprising:

the temperature measuring device comprises a shell, a temperature measuring device and a temperature measuring device, wherein the shell is provided with a liquid inlet joint, a liquid outlet joint and a temperature measuring cavity formed by hollowing inside, and the liquid inlet joint and the liquid outlet joint are both communicated with the temperature measuring cavity through fluid;

the temperature sensor assembly is arranged on the shell and is provided with a temperature measuring end, and the temperature measuring end can extend into the temperature measuring cavity of the shell.

In order to assemble the temperature sensor assembly on the shell, the outer wall of the shell is provided with an assembly hole penetrating through the temperature measuring cavity, and the temperature sensor assembly is detachably arranged in the assembly hole. Above-mentioned structural design has also made things convenient for user's inspection and has changed temperature sensor subassembly.

As an improvement, the temperature sensor assembly comprises a metal shell and a temperature sensor, the metal shell is integrally rod-shaped and is provided with an open first end portion and a closed second end portion, the metal shell is inserted into the assembling hole, the outer wall of the metal shell is hermetically connected with the inner wall of the assembling hole, the temperature sensor is arranged in the metal shell, and the sensing end of the temperature sensor is close to the second end portion of the metal shell so as to form the temperature measuring end.

In order to ensure that the assembly of the temperature sensor assembly in the shell is firmer, prevent the metal shell from being eccentric when being assembled or under the impact of water flow and influence the circulation of a water path, simultaneously reduce the contact between the metal shell and other parts of the shell as far as possible, ensure that the metal shell is surrounded by the water flow and improve the detection precision of the water flow temperature, the inner wall of the temperature measuring cavity is provided with a positioning groove corresponding to the assembly hole, and the positioning groove is used for the second end part of the metal shell to extend into the positioning groove and is matched with the second end part of the metal shell.

In order to avoid the leakage of the temperature sensor assembly at the joint position of the temperature sensor assembly and the shell after the temperature sensor assembly is assembled in the assembly hole of the shell, a sealing assembly is arranged between the outer wall of the metal shell and the inner wall of the assembly hole.

In order to achieve a good seal and to securely locate the temperature sensor assembly in the mounting hole, avoiding the occurrence of sloshing problems, the seal assembly comprises:

the sealing ring is sleeved on the outer side of the metal shell and is in sealing fit with the outer wall of the metal shell and the inner wall of the assembling hole;

and the positioning sleeve is sleeved on the outer side of the metal shell and is positioned between the outer wall of the metal shell and the inner wall of the assembly hole, the inner diameter of the positioning sleeve is matched with the outer diameter of the metal shell, and the outer diameter of the positioning sleeve is matched with the inner diameter of the assembly hole.

In order to avoid the displacement problem after the sealing ring is assembled in place and improve the sealing performance, a first positioning part protruding inwards in the radial direction is arranged on the inner wall of the assembling hole, the positioning sleeve is positioned on the sealing ring and tightly presses the sealing ring on the first positioning part, a second positioning part protruding outwards in the radial direction is arranged on the outer wall of the metal shell, and a stepped hole matched with the second positioning part is formed in the lower port of the positioning sleeve.

In order to avoid the displacement problem of the metal shell, the fixing firmness of the temperature sensor assembly is improved, a pair of clamping grooves which are symmetrically arranged relative to the axis of the assembly hole are formed in the wall of the shell, the clamping grooves penetrate through the assembly hole, and clamping springs which are used for clamping the metal shell and limiting the position above the positioning sleeve are arranged in the clamping grooves.

As a preferred structural design, the casing is the body that one end is uncovered and the other end is confined, the axial both sides of casing are located to the feed liquor joint and play liquid joint symmetry, the inner chamber of body constitutes promptly temperature measurement chamber and pilot hole. Of course, it is contemplated that the inlet and outlet connections may be arranged at 90-degree intersections or at other angles.

As a modification, the closed end of the housing extends in the axial direction of the housing to form a connecting rod for connecting with other external components. The connecting rod can be connected with a part to be fixed of a product through a screw or a buckle.

Compared with the prior art, the utility model has the advantages that: the utility model discloses a liquid temperature detection device simple structure, cost are lower, when using, directly with the feed liquor joint of casing and go out the liquid joint with the pipeline switch-on of volume of awaiting measuring can, its assembling process is very convenient and fast. On the other hand, the temperature measuring end of the temperature sensor assembly is directly contacted with the flowing liquid in the pipeline, so that the temperature detection is more stable and accurate. The liquid temperature detecting device has strong universality and is suitable for various products needing to detect the water temperature of the liquid inlet and the liquid outlet, such as coffee machines and direct drinking machines.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention;

fig. 2 is an exploded view of an embodiment of the present invention;

fig. 3 is a vertical cross-sectional view (in the axial direction of the housing) of an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken at A-A of FIG. 3;

fig. 5 is a cross-sectional view at B-B in fig. 3.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Referring to fig. 1-5, a liquid temperature sensing device includes a housing 10 and a temperature sensor assembly 50. The shell 10 is provided with a liquid inlet joint 20, a liquid outlet joint 30 and a temperature measuring cavity 11 which is formed in a hollow mode. The inlet connector 20 and the outlet connector 30 are both in fluid communication with the temperature measuring chamber 11. Specifically, the liquid inlet joint 20 and the liquid outlet joint 30 are used for being connected with two ports of a pipeline to be detected, so that the liquid in the corresponding pipeline further enters the temperature measuring cavity 11, and the temperature sensor assembly 50 is used for detecting the temperature of the liquid.

Referring to fig. 3, the outer wall of the housing 10 has a mounting hole 12 penetrating to the temperature measuring chamber 11, and the temperature sensor assembly 50 is detachably disposed in the mounting hole 12. Due to the structural design, the temperature sensor assembly 50 is convenient for a user to check and replace.

Referring to fig. 1, the inlet connector 20 and the outlet connector 30 of the housing 10 may be plug connectors, screw connectors or other conventional connector structures. In order to realize quick connection with the pipeline, the inlet joint 20 and the outlet joint 30 of the present embodiment are preferably plug joints.

Referring to fig. 2 and 3, as a preferred structure design, the casing 10 of this embodiment is a pipe body with one open end and one closed end, wherein the liquid inlet joint 20 and the liquid outlet joint 30 are symmetrically disposed on two axial sides of the casing 10. The inner cavity of the tube body forms the temperature measuring cavity 11 and the assembling hole 12 of the shell 10. Further, the closed end of the housing 10 is provided with a connecting rod 15 extending in the axial direction of the housing 10. The connecting rod 15 may be connected with a member to be connected of a product by a screw or a snap. Of course, it is contemplated that the inlet connection 20 and the outlet connection 30 may be disposed at a 90 degree intersection or other angles.

Referring to fig. 3, the temperature sensor assembly 50 is disposed on the housing 10 and has a temperature measuring end, and after the temperature sensor assembly 50 is inserted into the assembly hole 12 of the housing 10, the temperature measuring end thereof can correspondingly extend into the temperature measuring cavity 11 of the housing 10.

Referring to fig. 2 and 3, the temperature sensor assembly 50 includes a metal housing 51 and a temperature sensor 52. The metal shell 51 has a rod shape as a whole, and has an open first end 511 and a closed second end 512. After the metal shell 51 is inserted into the fitting hole 12 of the case 10, the outer wall of the metal shell 51 is sealingly connected with the inner wall of the fitting hole 12. The temperature sensor 52 is disposed in the metal shell 51, and a sensing end of the temperature sensor 52 is close to the second end 512 of the metal shell 51, thereby forming a temperature measuring end of the temperature sensor assembly 50.

Referring to fig. 3, the inner wall of the temperature measuring chamber 11 has a positioning groove 110 corresponding to the fitting hole 12, and the positioning groove 110 is a spherical groove. After the metal shell 51 is assembled in place, the second end 512 of the metal shell 51 can extend into the spherical recess, and the second end 512 of the metal shell 51 has a convex cambered surface structure matched with the spherical recess. Due to the structural design, the temperature sensor assembly 50 can be more firmly assembled in the shell 10, the phenomenon that the metal shell 51 is eccentric when being assembled or under the impact of water flow to influence the circulation of a water path is avoided, meanwhile, the contact between the metal shell 51 and other parts of the shell 10 is reduced as much as possible, the metal shell 51 is surrounded by the water flow, and the detection precision of the water flow temperature is improved.

A sealing assembly is provided between the outer wall of the metal shell 51 and the inner wall of the fitting hole 12.

Referring to fig. 2 and 3, the seal assembly includes a seal ring 60 and a locating sleeve 70. The sealing ring 60 and the positioning sleeve 70 are both sleeved outside the metal shell 51, and the positioning sleeve 70 is located above the sealing ring 60 (the positioning sleeve 70 is closer to the port of the assembly hole 12). The seal ring 60 can be sealingly attached to the outer wall of the metal case 51 and the inner wall of the fitting hole 12. The positioning sleeve 70 is located between the outer wall of the metal shell 51 and the inner wall of the assembly hole 12, wherein the inner diameter of the positioning sleeve 70 is matched with the outer diameter of the metal shell 51, and the outer diameter of the positioning sleeve 70 is matched with the inner diameter of the assembly hole 12. Have radial inside convex first location portion 14 on the inner wall of pilot hole 12, the bar bead that first location portion 14 of this embodiment set up for the axial along casing 10 (body), and the bar bead has a plurality ofly, sets up along the circumference interval of the pilot hole 12 of casing 10. After the positioning sleeve 70 is assembled in the assembly hole 12, the sealing ring 60 can be pressed at the upper end of the strip-shaped convex rib, so that the problem of displacement after the sealing ring 60 is assembled in place is avoided, and the sealing performance is improved. In addition, the outer wall of the metal shell 51 is further provided with a second positioning portion 513 protruding radially outward, the second positioning portion 513 of this embodiment is an annular baffle structure, and the lower port of the positioning sleeve 70 is provided with a stepped hole 71 adapted to the annular baffle.

Referring to fig. 3 and 4, in order to avoid the displacement problem of the metal shell 51 and improve the fixing reliability of the temperature sensor assembly 50, the wall of the housing 10 has a pair of clamping grooves 13 symmetrically arranged relative to the axis of the mounting hole 12, the clamping grooves 13 penetrate through the mounting hole 12, and the clamping grooves 13 are used for placing the clamping springs 40. The snap spring 40 can clamp the metal shell 51 after being assembled in the card slot 13. In addition, the fitting hole 12 of the housing 10 is a stepped hole with a large top and a small bottom, and after the positioning sleeve 70 is fitted in place, the lower portion of the positioning sleeve 70 extends into the small hole section 121 of the stepped hole, and the upper portion is located in the large hole section 122 of the stepped hole, so that a gap is formed between the outer wall of the upper portion of the positioning sleeve 70 and the inner wall of the large hole section 122 of the stepped hole. The clamping groove 13 is correspondingly formed in the large hole section 122 of the assembling hole 12, so that after the clamp spring 40 is assembled in place, the clamp spring 40 can form a limit position above the positioning sleeve 70, and the positioning sleeve 70 is prevented from being separated upwards.

Claims

1. A liquid temperature detection device is characterized by comprising:

the temperature measuring device comprises a shell (10) and a temperature measuring device, wherein the shell is provided with a liquid inlet joint (20), a liquid outlet joint (30) and a temperature measuring cavity (11) which is formed in a hollow mode, and the liquid inlet joint (20) and the liquid outlet joint (30) are both communicated with the temperature measuring cavity (11) in a fluid mode;

the temperature sensor assembly (50) is arranged on the shell (10) and is provided with a temperature measuring end, and the temperature measuring end can extend into the temperature measuring cavity (11) of the shell (10).

2. The liquid temperature-sensing device of claim 1, wherein: the outer wall of the shell (10) is provided with an assembly hole (12) penetrating through the temperature measuring cavity (11), and the temperature sensor assembly (50) is detachably arranged in the assembly hole (12).

3. The liquid temperature-sensing device of claim 2, wherein: temperature sensor subassembly (50) include metal casing (51) and temperature sensor (52), metal casing (51) are whole to be the shaft-like to have open first end (511) and confined second end (512), metal casing (51) are inserted and are established pilot hole (12) in, the outer wall of metal casing (51) with the inner wall sealing connection of pilot hole (12), temperature sensor (52) are located in metal casing (51) to the response end of temperature sensor (52) is close to second end (512) of metal casing (51) thereby constitute temperature measuring end.

4. The liquid temperature-sensing device of claim 3, wherein: the inner wall of the temperature measuring cavity (11) is provided with a positioning groove (110) corresponding to the assembly hole (12) and allowing the second end part (512) of the metal shell (51) to extend into the positioning groove, and the positioning groove (110) is matched with the second end part (512) of the metal shell (51).

5. The liquid temperature-sensing device of claim 3, wherein: and a sealing assembly is arranged between the outer wall of the metal shell (51) and the inner wall of the assembly hole (12).

6. The liquid temperature detection apparatus of claim 5, wherein the seal assembly comprises:

the sealing ring (60) is sleeved on the outer side of the metal shell (51) and is in sealing fit with the outer wall of the metal shell (51) and the inner wall of the assembling hole (12);

and the positioning sleeve (70) is sleeved on the outer side of the metal shell (51) and is positioned between the outer wall of the metal shell (51) and the inner wall of the assembly hole (12), the inner diameter of the positioning sleeve (70) is matched with the outer diameter of the metal shell (51), and the outer diameter of the positioning sleeve (70) is matched with the inner diameter of the assembly hole (12).

7. The liquid temperature-sensing device of claim 6, wherein: the inner wall of the assembly hole (12) is provided with a first positioning part (14) protruding inwards in the radial direction, the positioning sleeve (70) is positioned on the sealing ring (60) and presses the sealing ring (60) onto the first positioning part (14), the outer wall of the metal shell (51) is provided with a second positioning part (513) protruding outwards in the radial direction, and the lower port of the positioning sleeve (70) is provided with a step hole (71) matched with the second positioning part (513).

8. The liquid temperature-sensing device of claim 7, wherein: the wall of the shell (10) is provided with a pair of clamping grooves (13) which are symmetrically arranged relative to the axis of the assembly hole (12), the clamping grooves (13) penetrate through the assembly hole (12), and clamping springs (40) which are used for clamping the metal shell (51) and limiting the position above the positioning sleeve (70) are arranged in the clamping grooves (13).

9. The liquid temperature-detecting device according to any one of claims 2 to 8, wherein: casing (10) are the open and other end confined body in one end, the axial both sides of casing (10) are located to feed liquor joint (20) and play liquid joint (30) symmetry, the inner chamber of body constitutes temperature measurement chamber (11) and pilot hole (12) promptly.

10. The liquid temperature-sensing device of claim 9, wherein: the closed end of the shell (10) extends along the axial direction of the shell (10) to form a connecting rod (15) for connecting with other external components.