Flow channel type liquid heater adopting thermocouple to measure temperature

Abstract

The utility model provides a runner type liquid heater adopting a thermocouple to measure temperature, which comprises a heating tube and a temperature sensor used for detecting the temperature inside the heating tube and / or the temperature of liquid, the temperature sensor comprises a thermocouple, and the thermocouple extends into the heating tube from the water outlet end of the heating tube. The thermocouple can detect the temperature of liquid flowing to the water outlet end in the heating pipe and generate a corresponding electric signal according to the detected temperature. Specifically, the thermocouple is arranged at the water outlet end so as to quickly and accurately measure the water temperature, the thermocouple can be in direct contact with a measured object and is not influenced by an intermediate medium, so that the detection is more accurate, and the temperature measurement is accurate because the thermocouple is positioned at the water outlet end and is in direct contact with water; the thermocouple can timely reflect the temperature change in the heating pipe and / or the liquid, the temperature measurement accuracy of the temperature sensor is improved, the thermocouple can generate a corresponding electric signal according to the temperature measured by the thermocouple, and the electric signal is transmitted to the amplifier circuit, so that the temperature data can be accurately measured and processed.

Description

Technical Field

[0001] The utility model relates to the technical field of heaters, in particular to a flow channel type liquid heater which adopts a thermocouple to measure temperature. Background Art

[0002] Components for continuous heating of liquids are generally used in heating appliances that need to continuously produce hot water, such as heating structures in coffee machines, beverage heaters, and heating steam engines. In the prior art, such heating appliances generally include an inner tube that provides a liquid flow channel and an outer heating tube for heating. The outer wall of the outer heating tube is printed with a thick film circuit. When the thick film circuit is powered on and heated, the liquid passing through the liquid flow channel of the inner tube is heated.

[0003] Chinese patent document number CN219756642U disclosed a noise reduction thick film heating structure and water-using equipment in 2022, specifically disclosed a shell, the shell is provided with a water outlet structure and a water inlet structure, the water outlet structure includes a first pipe section, a second pipe section and a first temperature measuring component, the first pipe section is connected to the second pipe section, and the pipe diameter of the second pipe section is smaller than the first pipe section; a thick film heating tube, the upper end of the thick film heating tube is connected to the first pipe section, and the lower end of the thick film heating tube is connected to the water inlet structure: the liquid flows into the thick film heating tube through the water inlet structure and continues to flow upward, the thick film heating tube continues to heat up to heat the liquid, the heated liquid spreads upward to enter the first pipe section and then flows into the second pipe section, and the first temperature measuring component can measure the temperature of the liquid located in the first pipe section. In the above-mentioned disclosed patent document, although the first temperature measuring component can detect the temperature of the liquid outlet water, the NTC thermistor used in the first temperature measuring component can only detect the hot water on the outlet pipe, and cannot detect the internal temperature of the thick film heating tube and the liquid temperature in real time, which is easy to cause inaccurate temperature measurement.

[0004] Therefore, further improvement is needed. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a flow channel liquid heater using a thermocouple to measure temperature so as to overcome the shortcomings of the prior art. The thermocouple is arranged at the water outlet and can measure the water temperature quickly and accurately.

[0006] A flow channel liquid heater designed for this purpose and using thermocouple temperature measurement includes a heating tube and a temperature sensor for detecting the temperature inside the heating tube and / or the liquid. The temperature sensor includes a thermocouple, and the thermocouple extends into the heating tube from the water outlet end of the heating tube. The thermocouple can detect the temperature of the liquid flowing from the inside of the heating tube to the water outlet end and generate a corresponding electrical signal according to the measured temperature.

[0007] A water outlet end cover is provided on the water outlet end of the heating tube, and a water outlet is provided on the water outlet end cover. The thermocouple is located in the heating tube and close to the water outlet.

[0008] The water outlet end cover is provided with a connecting pipe connected with the heating pipe, and the thermocouple extends from the connecting pipe into the heating pipe.

[0009] The connecting pipe is provided with an opening, and the thermocouple extends from the connecting pipe into the heating pipe through the opening.

[0010] The opening is provided with a sealing structure, which includes a sealing ring, a sealing glue or a sealing plug.

[0011] The water outlet end cover is also provided with a water outlet pipe, which is connected with the connecting pipe, and the hot water discharged from the water outlet contacts with the thermocouple.

[0012] The temperature sensor also includes a thermocouple connecting wire, which is connected to the thermocouple, and the thermocouple extends into the heating tube through the thermocouple connecting wire.

[0013] A pipeline and a flow-guiding structure are also arranged in the heating tube. The flow-guiding structure is arranged around the outer peripheral wall of the pipeline. The heating tube, the pipeline and the flow-guiding structure together form a spiral water flow channel.

[0014] The flow guiding structure comprises flow guiding members which are arranged at intervals in a spiral manner, and the flow guiding members are arranged along the axial direction of the pipeline.

[0015] The water inlet end of the heating tube is provided with a water inlet end cover; the heating tube is a thick film heating component or a metal heating component arranged on the outer side wall of the heating tube.

[0016] A flow channel liquid heater using thermocouple temperature measurement in the above embodiment includes a heating tube and a temperature sensor for detecting the temperature of the inside of the heating tube and / or the liquid. The temperature sensor includes a thermocouple, which extends from the water outlet of the heating tube into the heating tube. The thermocouple can detect the temperature of the liquid flowing from the inside of the heating tube to the water outlet and generate a corresponding electrical signal according to the measured temperature. Specifically, the temperature sensor adopts a thermocouple, which is arranged at the water outlet for the purpose of quickly and accurately measuring the water temperature. Since the thermocouple can directly contact the object to be measured and is not affected by the intermediate medium, the detection is more accurate. The temperature measurement is accurate because the thermocouple is located at the water outlet and directly contacts the water. The thermocouple can timely reflect the temperature changes of the inside of the heating tube and / or the liquid, thereby improving the accuracy of the temperature measurement of the temperature sensor. According to the temperature measured by the thermocouple, the thermocouple will generate a corresponding electrical signal, which is transmitted to the amplifier circuit to accurately measure and process the temperature data, thereby more accurately controlling the heating process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and the description thereof are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a cross-sectional view of the heating tube and temperature sensor structure in the first embodiment of the utility model.

[0020] Figure 2 It is a schematic diagram of the structure of the water outlet end cover, the heating pipe and the thermocouple in the first embodiment of the utility model. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0022] like Figure 1 and Figure 2 As shown, a flow channel liquid heater using thermocouple temperature measurement is provided, including a heating tube 1 and a temperature sensor 2 for detecting the temperature inside the heating tube 1 and / or the liquid. The temperature sensor 2 includes a thermocouple 201. The thermocouple 201 extends into the heating tube 1 from the water outlet end of the heating tube 1. The thermocouple 201 can detect the temperature of the liquid flowing from the inside of the heating tube 1 to the water outlet end and generate a corresponding electrical signal according to the measured temperature.

[0023] Specifically, the temperature sensor 2 adopts a thermocouple 201, and the thermocouple 201 is arranged at the water outlet for the purpose of measuring the water temperature quickly and accurately. Since the thermocouple 201 can directly contact the object to be measured and is not affected by the intermediate medium, the detection is more accurate. The temperature measurement is accurate because the thermocouple 201 is located at the water outlet and directly contacts the water. The thermocouple 201 can timely reflect the temperature changes inside the heating tube 1 and / or the liquid, thereby improving the temperature measurement accuracy of the temperature sensor 2. According to the temperature measured by the thermocouple 201, the thermocouple 201 will generate a corresponding electrical signal, which is transmitted to the amplifier circuit to accurately measure and process the temperature data, thereby more accurately controlling the heating process.

[0024] Specifically, a water outlet cover 3 is disposed on the water outlet end of the heating tube 1 , a water outlet 303 is disposed on the water outlet cover 3 , and the thermocouple 201 is located inside the heating tube 1 and close to the water outlet 303 .

[0025] Specifically, the water outlet end of the heating tube 1 is provided with a water outlet end cover 3, which is located at the outlet of the heating tube 1, for closing the heating tube 1 and providing a water outlet, and the water outlet end cover 3 is provided with a water outlet 303 for allowing the heated liquid to flow out; the thermocouple 201 is located inside the heating tube 1, and is close to the water outlet 303. By placing the thermocouple 201 at a position close to the water outlet 303, the temperature of the liquid can be measured more accurately, because the temperature at this position is closer to the temperature of the liquid after being heated. Such an arrangement enables the thermocouple 201 to reflect the temperature changes of the liquid in a timely manner, thereby more accurately controlling the heating process, ensuring that the thermocouple 201 can accurately reflect the temperature changes of the liquid during the heating process, thereby improving the accuracy of the temperature measurement of the temperature sensor 2.

[0026] Further, if Figure 1 and Figure 2 As shown, a connecting pipe 301 connected to the heating pipe 1 is provided on the water outlet end cover 3 , and the thermocouple 201 extends into the heating pipe 1 from the connecting pipe 301 .

[0027] Specifically, the arrangement of the connecting tube 301 ensures, on the one hand, that the heated liquid can flow out of the connecting tube 301 smoothly; on the other hand, the thermocouple 201 can extend from the connecting tube 301 into the interior of the heating tube 1. Such an arrangement enables the thermocouple to contact the liquid more closely and sense the temperature change of the liquid more accurately, thereby improving the accuracy and stability of temperature detection.

[0028] Further, if Figure 1 and Figure 2 As shown, the connecting pipe 301 is provided with an opening 3011 , and the thermocouple 201 extends from the connecting pipe 301 into the heating tube 1 through the opening 3011 .

[0029] Specifically, the opening 3011 is configured to allow the thermocouple 201 to enter the interior of the heating tube 1 from the connecting tube 301. The opening 3011 is located at the end of the connecting tube 301 so that the thermocouple 201 can smoothly pass through the connecting tube 301 and enter the interior of the heating tube 1, thereby ensuring that the thermocouple 201 can accurately measure the temperature of the interior of the heating tube 1 and / or the liquid.

[0030] Further, if Figure 1 and Figure 2 As shown, a sealing structure 4 is provided on the opening 3011 , and the sealing structure 4 includes a sealing ring, or a sealing glue or a sealing plug.

[0031] Specifically, the sealing structure 4 located on the opening 3011 is used to ensure that the connection between the connecting tube 301 and the thermocouple 201 is well sealed to prevent liquid leakage; the sealing structure 4 can take different forms, such as a sealing ring, a sealant or a sealing plug, etc. These sealing materials can form an effective seal at the connection to prevent liquid leakage; the sealing ring is usually made of soft materials such as rubber or silicone, which can ensure that the connection fits tightly; the sealant or the sealing plug can be filled in the connection to form a sealing layer to improve the sealing performance.

[0032] Further, if Figure 1 and Figure 2 As shown, a water outlet pipe 302 is also provided on the water outlet end cover 3 , and the water outlet pipe 302 is connected to the connecting pipe 301 , and the hot water discharged from the water outlet 303 contacts the thermocouple 201 .

[0033] Specifically, a water outlet pipe 302 is provided on the water outlet end cover 3 for discharging the heated liquid, and the water outlet pipe 302 is connected to the connecting pipe 301; the thermocouple 201 can directly detect the temperature of the hot water discharged from the water outlet 303, and the thermocouple 201 can sense the temperature change of the liquid in time, so as to measure the temperature more accurately, and transmit the corresponding electrical signal to the control unit to realize the temperature control of the heating system.

[0034] Further, if Figure 1 and Figure 2 As shown, the temperature sensor 2 further includes a thermocouple connecting wire 202 , which is connected to the thermocouple 201 , and the thermocouple 201 extends into the heating tube 1 through the thermocouple connecting wire 202 .

[0035] Specifically, the thermocouple connecting wire 202 is connected to the thermocouple 201, so that the thermocouple 201 can transmit the temperature signal of the inside of the heating tube 1 and / or the liquid to an external circuit (such as an amplifier circuit) for processing and analysis, and the thermocouple 201 extends into the heating tube 1 through the thermocouple connecting wire 202, ensuring that the thermocouple can be completely placed in the environment of the measured temperature, so that the temperature change of the inside of the heating tube 1 and / or the liquid can be accurately sensed.

[0036] Further, if Figure 1 As shown, a pipeline 5 and a flow guiding structure are further provided in the heating tube 1 . The flow guiding structure is arranged around the outer peripheral wall of the pipeline 5 . The heating tube 1 , the pipeline 5 and the flow guiding structure together constitute a spiral water flow channel 6 .

[0037] Specifically, the structural design of the spiral water flow channel 4 reduces the flow of liquid when the liquid passes through the spiral water flow channel 6, increases the distance the liquid flows inside the heating tube 1, increases the contact time between the liquid and the heating tube 1, and improves the heating efficiency, so that the liquid can be fully heated to reach the set heating temperature.

[0038] Further, if Figure 1 As shown, the flow guiding structure includes flow guiding members 7 arranged at intervals in a spiral manner, and the flow guiding members 7 are arranged along the axial direction of the pipeline 5.

[0039] Specifically, the arrangement of the guide members 7 helps to guide the liquid to flow along a predetermined path, and the spacing of the guide members 7 can be adjusted as needed to control the flow speed and flow direction of the liquid, thereby achieving a more effective heating effect.

[0040] Further, if Figure 1 As shown, a water inlet end cover 8 is provided at the water inlet end of the heating tube 1 ; the heating tube 1 is a thick film heating component or a metal heating component arranged on the outer wall of the heating tube 1 .

[0041] Specifically, the design of the water inlet end cover 8 allows the liquid to smoothly enter the interior of the heating tube 1 and ensures that the liquid will not leak or overflow during the heating process; the outer wall of the heating tube 1 is provided with a thick film heating component or a metal heating component, and the heat generated by the thick film heating component or the metal heating component after being energized can be quickly and efficiently transferred to the liquid.

[0042] In the description of the present invention, it should be understood that 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 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 structure or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly defined and specified, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0046] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0047] It should also be understood that when explaining the connection relationship or positional relationship of elements, although not explicitly described, the connection relationship and positional relationship are interpreted as including an error range, which should be within the acceptable deviation range of a specific value determined by those skilled in the art. For example, "approximately", "approximately" or "substantially" may mean within one or more standard deviations, which are not limited here.

[0048] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A flow channel liquid heater using thermocouple temperature measurement, characterized in that: The invention comprises a heating tube (1) and a temperature sensor (2) for detecting the temperature of the interior of the heating tube (1) and / or liquid, wherein the temperature sensor (2) comprises a thermocouple (201), wherein the thermocouple (201) extends from the water outlet end of the heating tube (1) into the heating tube (1), and the thermocouple (201) can detect the temperature of liquid flowing from the interior of the heating tube (1) to the water outlet end and generate a corresponding electrical signal according to the measured temperature.

2. The flow channel type liquid heater using thermocouple temperature measurement according to claim 1, characterized in that: A water outlet cover (3) is provided on the water outlet end of the heating tube (1), a water outlet port (303) is provided on the water outlet cover (3), and the thermocouple (201) is located inside the heating tube (1) and close to the water outlet port (303).

3. The flow channel type liquid heater using thermocouple temperature measurement according to claim 2, characterized in that: The water outlet end cover (3) is provided with a connecting pipe (301) connected to the heating pipe (1), and the thermocouple (201) extends from the connecting pipe (301) into the heating pipe (1).

4. The flow channel type liquid heater using thermocouple temperature measurement according to claim 3, characterized in that: The connecting tube (301) is provided with an opening (3011), and the thermocouple (201) extends from the connecting tube (301) into the heating tube (1) through the opening (3011).

5. The flow channel type liquid heater using thermocouple temperature measurement according to claim 4, characterized in that: A sealing structure (4) is provided on the opening (3011), and the sealing structure (4) comprises a sealing ring, or a sealing glue, or a sealing plug.

6. The flow channel type liquid heater using thermocouple temperature measurement according to claim 3, characterized in that: The water outlet end cover (3) is also provided with a water outlet pipe (302), the water outlet pipe (302) being connected to the connecting pipe (301), and the hot water discharged from the water outlet (303) is in contact with the thermocouple (201).

7. The flow channel type liquid heater using thermocouple temperature measurement according to claim 1, characterized in that: The temperature sensor (2) further comprises a thermocouple connecting wire (202), wherein the thermocouple connecting wire (202) is connected to the thermocouple (201), and the thermocouple (201) extends into the heating tube (1) through the thermocouple connecting wire (202).

8. The flow channel type liquid heater using thermocouple temperature measurement according to claim 1, characterized in that: The heating tube (1) is further provided with a pipeline (5) and a flow-guiding structure, the flow-guiding structure being arranged around the outer peripheral wall of the pipeline (5), and the heating tube (1), the pipeline (5) and the flow-guiding structure together forming a spiral water flow channel (6).

9. The flow channel type liquid heater using thermocouple temperature measurement according to claim 8, characterized in that: The flow guiding structure comprises flow guiding members (7) arranged at intervals in a spiral manner, and the flow guiding members (7) are arranged along the axial direction of the pipeline (5).

10. The flow channel type liquid heater using thermocouple temperature measurement according to claim 1, characterized in that: The water inlet end of the heating tube (1) is provided with a water inlet end cover (8); the heating tube (1) is a thick film heating component or a metal heating component arranged on the outer wall of the heating tube (1).

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