WO2022241693A1

WO2022241693A1 - Electric heating evaporator for accurate temperature measurement

Info

Publication number: WO2022241693A1
Application number: PCT/CN2021/094714
Authority: WO
Inventors: 丁建军; 牛建华
Original assignee: 深圳葭南科技有限公司
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2022-11-24

Abstract

Disclosed is an electric heating evaporator for accurate temperature measurement, comprising a heating pot, a heat generating and temperature measuring assembly flatly placed on the bottom of the outer wall of the heating pot, wherein the heat generating and temperature measuring assembly comprises a first heat generating wire and a second heat generating wire which have a common end; the first heat generating wire is used for heating; the second heat generating wire is used for temperature measurement; and the resistance value of the first heat generating wire is less than the resistance value of the second heat generating wire. Since a heat generating element is flatly placed on the bottom of the outer wall of the heating pot, there is no heat generating element in the pot, which facilitates cleaning and use for users. Moreover, the heat generating and temperature measuring assembly comprises the first heat generating wire and the second heat generating wire which have the common end, the first heat generating wire is used for heating, the second heat generating wire is used for temperature measurement, and the resistance value of the first heat generating wire is less than the resistance value of the second heat generating wire, so that the heating temperature of the evaporator may be precisely controlled.

Description

An electric heating evaporator with precise temperature measurement

technical field

The invention relates to the field of electric heating evaporators, in particular to an electric heating evaporator for precise temperature measurement.

Background technique

In the field of electric heating evaporators, it is generally required that the evaporator can be replaced, taken out and cleaned, etc., which makes accurate temperature measurement a problem. Most of the replaceable electric heating evaporators on the market use fixed power drive without temperature measurement, and a few have temperature measurement. Wen's electric heating evaporator uses the TCR (temperature coefficient of resistance) change of the heating wire to roughly measure the temperature, which cannot achieve the purpose of accurate temperature measurement. If it is an integral non-replaceable electric heating evaporator, a temperature measuring probe can be added to measure the temperature of the heating pot, and the temperature can be measured accurately, but there is a problem that it cannot be replaced.

Specifically, there are several commonly used electric heating evaporator technologies:

1) There is no temperature measurement function, and the temperature of the evaporator can only be estimated by the driving power. This method is simple, but the actual temperature is very different from the estimated temperature. At the same time, the amount of evaporator in the evaporator seriously affects the evaporator. temperature.

2) Using the TCR characteristic of the heating element, the heating element itself is used to generate heat to heat the evaporator, and at the same time use the TCR characteristic of the heating element to measure the temperature of the dual-function evaporator. Due to the large evaporation power of this kind of evaporator, the resistance of the corresponding heating element is small, and the absolute value of the resistance change is small. If it is used on a non-replaceable evaporator product, there is no contact circuit (referring to the inside of the container) The resistance value error of the contact part between the heating wire and the control circuit outside the container (the error of the contact resistance may be greater than the change of the resistance value due to temperature, and the resistance value of the contact resistance is unstable), the control circuit is easier to deal with. If it is used in a replaceable evaporator, the influence of the error of the contact resistance is greater than the change of the resistance of the heating element itself, and it is impossible to accurately control the temperature.

3) Connect an external temperature sensor to measure the temperature of the evaporator container. This method is generally used in non-replaceable evaporators.

To sum up, the current electric heating evaporator cannot achieve the purpose of accurate temperature measurement and replacement.

technical problem

The technical problem to be solved by the present invention is to provide a replaceable electric heating evaporator for accurate temperature measurement in view of the above-mentioned defects in the prior art that can not realize both accurate temperature measurement and replacement.

technical solution

The technical solution adopted by the present invention to solve the technical problem is to construct an electric heating evaporator for precise temperature measurement, including a heating pot, and a heating and temperature measuring component placed flat on the bottom of the outer wall of the heating pot. The temperature assembly includes a first heating wire and a second heating wire with a common end, the first heating wire is used for heating, the second heating wire is used for temperature measurement, and the resistance of the first heating wire is smaller than that of the second heating wire.

Preferably, the heating and temperature measuring component is formed by etching or engraving a metal film.

Preferably, the heat-generating and temperature-measuring component includes a first metal sheet, a second metal sheet, and a third metal sheet sequentially arranged from left to right, the first metal sheet serves as the common end, and the first metal sheet and the third metal sheet are connected by two front and rear metal strips to form the first heating wire that is in the shape of a ring as a whole, and the first metal sheet and the second metal sheet are formed by a metal strip that is in the shape of a line as a whole. The second heating wire, the metal strip of the second heating wire is located between the two front and rear metal strips of the first heating wire, and the width of the second heating wire is smaller than that of the first heating wire.

Preferably, both the metal strips of the first heating wire and the metal strips of the second heating wire are composed of a row of "几"-shaped patterns.

Preferably, it also includes a bracket, the heating temperature measuring assembly is clamped between the bottom of the outer wall of the heating pot and the bracket, and the bracket is provided with the first metal sheet, the second metal sheet and the bracket. The third metal sheets respectively correspond to the three through holes, and the first metal sheet, the second metal sheet and the third metal sheet are respectively connected to the three conductive elements passing through the three through holes.

Preferably, it also includes a heating core shell, a heating core upper cover and a heating core base for blocking the upper and lower openings of the heating core shell, the heating pot and the bracket are arranged in the heating core shell, the The heat insulation and buffering are realized by the first sealing ring between the heating pot and the heating core upper cover, and the heat insulation and buffering are realized by the second sealing ring between the support and the heating core base.

Preferably, three electrodes are also included, and three via holes corresponding to the three electrodes are opened on the base of the heating core, and the three electrodes are embedded in the three via holes and connected to the three via holes. Conductor connection.

Preferably, it also includes three insulating rings wrapped outside the three electrodes.

Beneficial effect

The electric heating evaporator for precise temperature measurement of the present invention has the following beneficial effects: in the present invention, the heating and temperature measuring components are placed flat on the bottom of the outer wall of the heating pot, so that since the heating element is placed on the bottom of the outer wall of the heating pot, There is no heating element, which is convenient for users to clean and use, and the heating temperature measurement component includes a first heating wire and a second heating wire with a common end, the first heating wire is used for heating, the second heating wire is used for temperature measurement, and the first heating wire The resistance value of the second heating wire is smaller than that of the second heating wire, so that the heating temperature of the evaporator can be precisely controlled.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings on the premise of not paying creative work:

Fig. 1 is a structural schematic diagram of different viewing angles of the precise temperature measurement electric heating evaporator of the present invention;

Fig. 2 is an exploded view of the electric heating evaporator for precise temperature measurement of the present invention;

Fig. 3 is a sectional view of an electric heating evaporator for precise temperature measurement of the present invention;

Fig. 4 is a structural schematic diagram of different viewing angles of the heat-generating and temperature-measuring component.

BEST MODE FOR CARRYING OUT THE INVENTION

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Typical embodiments of the invention are shown in the drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present invention will be thorough and complete.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

Terms including ordinal numbers such as “first” and “second” used in this specification can be used to describe various components, but these components are not limited by these terms. These terms are used only to distinguish one element from other elements. For example, without departing from the scope of rights of the present invention, a first constituent element may be named a second constituent element, and similarly, a second constituent element may also be named a first constituent element.

The general idea of the present invention is: the heating element is placed flat on the bottom of the outer wall of the heating pot, and there is no heating element in the heating pot, which is convenient for users to clean and use; the heating temperature measuring component includes a first heating wire and a second heating wire with a common end, and the One heating wire is used for heating, and the second heating wire is used for temperature measurement. The resistance value of the first heating wire is smaller than that of the second heating wire, so that the heating temperature of the evaporator can be precisely controlled.

In order to better understand the above-mentioned technical solution, the above-mentioned technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present application. To illustrate, rather than limit, the technical solutions of the present application, the embodiments of the present invention and the technical features in the embodiments can be combined without conflict.

Referring to Figures 1-3, the precise temperature measurement electric heating evaporator of this embodiment includes: a heating core shell 3, a heating pot 4, a heating and temperature measuring component 5 placed flat on the bottom of the outer wall of the heating pot 4, a bracket 6, The upper cover 1 of the heating core, the base 8 of the heating core, the three electrodes 10 , the three insulating rings 9 wrapped around the three electrodes 10 , the first sealing ring 2 and the second sealing ring 7 .

The heating core shell 3 and the heating pot 4 are cylindrical containers with a hollow interior, and the cross-section is roughly in the shape of a racetrack. Of course, the shapes of the heating core shell 3 and the heating pot 4 are not limited thereto, and this embodiment is only an example. The heating pot 4 is made of heat-conducting material, so the heat generated by the heating temperature measuring component 5 can be transferred to the heating pot 4 to realize electric heating. The heating core shell 3 is a heat insulating material. The bottom of the heating pot 4 is closed and the top is open. Both the bottom and the top of the heating core shell 3 are open, and the heating core upper cover 1 and the heating core base 8 are respectively used to block the upper and lower openings of the heating core shell 3 .

The bracket 6 is roughly in the shape of a table with four legs, the heating pot 4 and the bracket 6 are arranged in the heating core shell 3, and the heating and temperature measuring assembly 5 is clamped between the bottom of the outer wall of the heating pot 4 and the Between brackets 6. Between the top of the heating pot 4 and the heating core upper cover 1, heat insulation and buffering are realized through the first sealing ring 2, and between the four legs of the support 6 and the heating core base 8 through the second sealing ring 7 Realize heat insulation and buffering. Specifically, a circle of grooves is formed on the side of the heating core upper cover 1 facing the heating pot 4, and the first sealing ring 2 is embedded in the circle of grooves. One side of the heating core base 8 facing the support 6 is provided with a circle of grooves, the first sealing ring 2 is embedded in the circle of grooves, and after the heating core upper cover 1 is inserted into the opening on the top of the heating core shell 3, the first seal The ring 2 is against the top of the heating pot 4, and the heating core base 8 is inserted into the opening at the bottom of the heating core shell 3, and the second sealing ring 7 is against the four legs of the bracket 6.

With reference to Fig. 4, described heating temperature measuring assembly 5 comprises the first heating wire 54 and the second heating wire 55 that have common end, and the first heating wire 54 is used for heating, and the second heating wire 55 is used for temperature measurement, and the first heating wire The resistance value of 54 is smaller than the resistance value of the second heating wire 55 .

The first heating wire is used for heating, which is equivalent to a heating resistor. The second heating wire is used for temperature measurement, that is, it is equivalent to a temperature measurement resistor, and the temperature of the pot body of the evaporation container is measured by utilizing the resistance TCR characteristic and the variation of resistance value with temperature. Specifically, the heating and temperature measuring component 5 is formed by etching or engraving a metal film, and the metal material includes but not limited to SUS304, SUS316 and the like. The pattern formed by etching or engraving includes a first metal sheet 51, a second metal sheet 52 and a third metal sheet 53 arranged in sequence from left to right, the first metal sheet 51 serves as the common end, and the first metal sheet 51 serves as the common end, and the first metal sheet 51 The sheet 51 and the third metal sheet 53 are connected by two front and rear metal strips to form the first heating wire 54 in a ring shape as a whole. In this embodiment, the overall shape of the first heating wire 54 is similar to the cross-sectional shape of the heating pot 4. Also roughly in the shape of a runway. The first metal sheet 51 and the second metal sheet 52 are composed of a metal strip to form the overall linear second heating wire 55, and the metal strip of the second heating wire 55 is positioned on the first heating wire. Between the two front and rear metal strips 54 , the width of the second heating wire 55 is smaller than the width of the first heating wire 54 . Both the metal strip of the first heating wire 54 and the metal strip of the second heating wire 55 are composed of a row of "几"-shaped patterns.

2-3, correspondingly, the bracket 6 is provided with three through holes corresponding to the first metal sheet 51, the second metal sheet 52 and the third metal sheet 53 respectively, and the first metal sheet 51. The second metal sheet 52 and the third metal sheet 53 are respectively connected to the three conductive elements 511, 521, 531 passing through the three through holes, and the conductive elements 511, 521, 531 are connected to the first metal sheet 51, The second metal piece 52 and the third metal piece 53 are fixed by welding. Correspondingly, three via holes corresponding to the three electrodes 10 are opened on the heating core base 8, and the three electrodes 10 are embedded in the three via holes and connected to the three conductive members 511 , 521, 531 connection. In this way, as shown in FIG. 4 , the conductive elements 511 and 531 form the two pins of the heating resistor, the conductive elements 511 and 521 form the two pins of the temperature measuring resistor, and the conductive element 511 is a common grounding pin.

In summary, the precise temperature measurement electric heating evaporator of the present invention has the following beneficial effects: In the present invention, the heating and temperature measuring components are placed flat on the bottom of the outer wall of the heating pot, so that since the heating element is placed on the outer wall of the heating pot At the bottom, there is no heating element in the heating pot, which is convenient for users to clean and use, and the heating temperature measurement component includes a first heating wire and a second heating wire with a common end, the first heating wire is used for heating, and the second heating wire is used for temperature measurement , the resistance value of the first heating wire is smaller than the resistance value of the second heating wire, so that the heating temperature of the evaporator can be precisely controlled.

Embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementations, and the above-mentioned specific implementations are only illustrative, rather than restrictive, and those of ordinary skill in the art will Under the enlightenment of the present invention, many forms can also be made without departing from the gist of the present invention and the protection scope of the claims, and these all belong to the protection of the present invention.

Claims

An electric heating evaporator for precise temperature measurement, comprising a heating pot, characterized in that it also includes a heating and temperature measuring assembly placed on the bottom of the outer wall of the heating pot, and the heating and temperature measuring assembly includes a first heating wire with a common end and a second heating wire, the first heating wire is used for heating, the second heating wire is used for temperature measurement, and the resistance value of the first heating wire is smaller than the resistance value of the second heating wire.
The precise temperature measurement electric heating evaporator according to claim 1, characterized in that, the heating temperature measurement component is formed by etching or engraving a metal film.
According to claim 1 or 2, the precise temperature measurement electric heating evaporator is characterized in that, the heating temperature measurement component includes a first metal sheet, a second metal sheet and a third metal sheet arranged in sequence from left to right, The first metal sheet is used as the common end, and the first metal sheet and the third metal sheet are connected by two front and rear metal strips to form the first heating wire in a ring shape as a whole. The first metal sheet and the third metal sheet The second metal sheet is composed of a metal strip to form the overall linear second heating wire, and the metal strip of the second heating wire is located between the two front and rear metal strips of the first heating wire. The width dimension of the second heating wire is smaller than the width dimension of the first heating wire.
The electric heating evaporator for precise temperature measurement according to claim 3, characterized in that, the metal strips of the first heating wire and the metal strips of the second heating wire are both composed of a row of "several"-shaped patterns.
The precise temperature measurement electric heating evaporator according to claim 3, further comprising a bracket, the heating and temperature measurement component is clamped between the bottom of the outer wall of the heating pot and the bracket, and the bracket There are three through holes corresponding to the first metal sheet, the second metal sheet and the third metal sheet respectively, and the first metal sheet, the second metal sheet and the third metal sheet are respectively connected with the three through holes. The three conductive members of the three through holes are connected.
The electric heating evaporator for precise temperature measurement according to claim 5, further comprising a heating core shell, a heating core upper cover and a heating core base for sealing the upper and lower openings of the heating core shell, so that The heating pot and the bracket are arranged in the shell of the heating core, and the heat insulation and buffering are realized through the first sealing ring between the heating pot and the upper cover of the heating core, and the heat insulation and buffering are realized between the bracket and the base of the heating core through The second sealing ring realizes heat insulation and buffering.
The electric heating evaporator for precise temperature measurement according to claim 6, further comprising three electrodes, three via holes corresponding to the three electrodes are opened on the base of the heating core, and the three electrodes Embedded in the three via holes and connected to the three conductive elements.
The precise temperature measurement electric heating evaporator according to claim 7, further comprising three insulating rings wrapped outside the three electrodes.