CN213713535U - Liquid heat exchanger in container with metal ceramic heating element - Google Patents

Abstract

The utility model relates to a liquid heat exchanger in courage with cermet heat-generating body, it includes high temperature resistant heat transfer shell and cermet heat-generating body, high temperature resistant heat transfer shell is equipped with the internal flow chamber that supplies liquid to pass through, the cermet heat-generating body includes integrative connection's the section of generating heat and overheated buffer section, the section of generating heat is located the internal flow chamber and the heating power is rated, high temperature resistant heat transfer shell comprises the shell main part and the sclausura heat transfer portion of body coupling, overheated buffer section is assembled in the shell main part, the medial surface thermal contact of sclausura heat transfer portion is in the section of generating heat, temperature switch is installed to the lateral surface of sclausura heat transfer portion, temperature switch is based on sclausura heat transfer portion whether the temperature surpasss the temperature threshold value and switches on or not in order to. The application has the effect of improving the temperature monitoring sensitivity of the MCH so as to prevent the MCH from overheating and burning dry.

Description

Liquid heat exchanger in container with metal ceramic heating element

Technical Field

The application relates to the field of rapid heaters, in particular to a liquid heat exchanger in a liner with a metal ceramic heating body.

Background

The conventional MCH metal ceramic heating element has the excellent electrical characteristics of fast heating, high heat conduction, high insulation, high energy conservation, no open fire at high temperature, excellent water-electricity separation, difficult scaling and the like, but the defects of the prior MCH metal ceramic heating element that the specific heat capacity of the metal ceramic is large, the thermal inertia is large, and the specific heat capacity of normal temperature water and boiling water is nearly 4210J/kg & lt & gt K & gt as measured by experiments, the specific heat capacity of the metal ceramic is 7790.1J/kg & lt K & gt at 22 ℃, 11482.2J/kg & lt K & gt at 427 ℃, 12239.9J/kg & lt K at 727 ℃, obviously, the specific heat of the metal ceramic reaches the multiple times of water at high temperature, the heat in the metal ceramic heating element is continuously diffused to the surface after the power is cut off, so that the temperature of the MCH metal ceramic heating element is continuously raised, and the power is cut off when the surface temperature of the body is 100 ℃ according to experimental data, the surface temperature can be increased to about 200 ℃ at most; the power is cut off when the surface temperature is 200 ℃, and the surface temperature can be raised to about 350 ℃ at most. Because the temperature rise rate of the MCH metal ceramic heating element is very fast, the MCH metal ceramic heating element can be heated to 200 ℃ within 10 seconds, if a highly sensitive power-off device is not provided, the highest temperature of the surface of the heating element can reach more than 500 ℃, and the brought high temperature easily causes irreversible damage to components such as sealing elements in electrical equipment or insulating layers of leads, and the like, thereby causing potential safety hazards. In conclusion, the thermal inertia problem of the MCH metal ceramic heating element can not be overcome, so that the MCH metal ceramic heating element can not be applied to the field of household appliance liquid heating.

SUMMERY OF THE UTILITY MODEL

In order to improve the temperature monitoring sensitivity of the MCH to prevent the MCH from overheating and dry burning, the application provides an in-tank liquid heat exchanger with a metal ceramic heating body.

The application provides a courage liquid heat exchanger with cermet heat-generating body adopts following technical scheme:

the utility model provides a courage liquid heat exchanger with cermet heat-generating body, includes high temperature resistant heat transfer shell and cermet heat-generating body, high temperature resistant heat transfer shell is equipped with the inner flow chamber that supplies liquid to pass through, the cermet heat-generating body includes integrative connection's heating segment and overheat buffering section, the heating segment is located the inner flow chamber and the heating power is rated, high temperature resistant heat transfer shell comprises integrative shell main part and sclausura heat transfer portion, overheat buffering section assembles on the shell main part, the medial surface heat contact in the heating segment of sclausura heat transfer portion, the lateral surface of sclausura heat transfer portion installs temperature switch, temperature switch is based on whether the temperature of sclausura heat transfer portion exceeds the temperature threshold with the power-on of control cermet heat-generating body.

By adopting the technical scheme, when liquid flows into the internal flow cavity, the liquid exchanges heat with the heating section, and the metal ceramic heating element has higher thermal inertia, namely, the temperature change has hysteresis compared with the current change, so that the method of controlling the current to change the heating temperature is not generally adopted. Since the heat exchange rate is related to the temperature difference, the higher the liquid flow rate in the internal flow cavity is, the faster the average heat exchange rate of the liquid flow is, and therefore, the method is adopted in the scheme that the rated heating power of the heating section is maintained, and the adjustment of the outlet liquid temperature is realized by changing the flow rate of the liquid flow in the internal flow cavity.

In order to realize instant heating and use of the liquid, the heating power of the metal ceramic heating element is usually set to be high, for example, 2KW, under the high heating power, once the liquid flow speed becomes slow or even is cut off, the liquid is easy to boil rapidly, a large amount of steam is generated during boiling, the steam reduces the contact area between the metal ceramic heating element and the liquid flow, further aggravates the temperature rise of the metal ceramic heating element, and thus dry burning is caused. Therefore, in the liquid heat exchanger, the shell is made of ceramic materials, and the ceramic materials have the characteristics of high temperature resistance and high heat transfer efficiency. The non-porous heat transfer part is in thermal contact with the heating section, and can quickly transfer heat of the heating section to the temperature switch, so that the structure has the characteristic of high sensitivity for thermal detection. When the temperature switch detects that the heating section is overheated, the temperature switch controls the power-off of the heating section to prevent further generation of heat, and the phenomenon that the metal ceramic heating body is overheated to cause severe boiling of the liquid inside to cause dry burning is prevented, so that the phenomenon that the liquid heat exchanger is integrally overheated to influence external equipment due to the dry burning is avoided.

Currently, in the related liquid heater products, for cost reasons, a plastic material is used as a shell of the heater, and a hole is punched on the shell so that the temperature measuring member is inserted into the inner flow cavity to measure the temperature of the heater. However, in the case of a heating element such as a cermet heating element, the high power and high thermal inertia thereof cause the heating element to rise to a certain temperature during dry burning, which easily causes melting of the plastic case. In addition, trompil on plastic housing, on the one hand can make plastic housing's mechanical strength reduce, and on the other hand still needs to increase the use of this kind of sealing member of rubber circle, because the cermet heat-generating body has the characteristics of high temperature, the sealing member is heated for a long time and is taken place ageing easily down, influences the life-span of product.

In this scheme, adopt high melting point, high heat transfer efficiency's material to make high temperature resistant heat transfer shell, because sclausura heat transfer portion and cermet heat-generating body and temperature switch butt simultaneously can be fast with heat transfer to temperature switch for temperature switch can be triggered with high sensitivity so that the outage of cermet heat-generating body, thereby prevents the overheated dry combustion method of cermet heat-generating body.

Since the cermet heating element is assembled and connected with the high temperature resistant heat transfer shell, a sealing member is usually added at the connection part for liquid-tight treatment so as to prevent the liquid in the internal flow cavity from seeping outwards. Meanwhile, the sealing piece can support the metal ceramic heating body. This assembled design is compared in the body coupling formula design of casing and heat-generating body, is favorable to the later stage to change and maintain the part, also is favorable to processing production simultaneously.

The overheating buffer section is also made of ceramic materials, and a heating circuit is not arranged in the overheating buffer section, so that the metal ceramic heating body does not actively generate heat in the using process, and when the temperature of the heating section is transferred to the overheating buffer section, the liquid flow can quickly take away the heat of the overheating buffer section, and the temperature of the overheating buffer section and the temperature of one end of the heating section connected with the overheating buffer section are kept at a lower level. When the temperature of the metal ceramic heating element rises rapidly and dry burning occurs, the metal ceramic heating element has a temperature rise process after power failure, and the temperature rise of the overheating buffer section is slow and the rise range is small due to the large thermal inertia of the ceramic material, so that the sealing element at the joint of the overheating buffer section and the shell is prevented from being melted due to overheating.

Because the overheating buffer section and the heating section are integrally connected and are all made of ceramic materials, the temperature is continuously changed from the overheating buffer section to the heating section, and the phenomenon that the ceramic is broken due to abrupt temperature change is avoided. If other high-heat-insulating materials are used to replace the ceramic materials, glue or other fixing parts are needed to connect the overheating buffer section and the heating section, the structure is more complicated, and the glue at the connection part risks aging or melting or poor heat conducting property under long-term heating.

Preferably, the high-temperature-resistant heat transfer shell is a ceramic shell or a stainless steel shell or a copper alloy shell.

By adopting the technical scheme, in some related liquid heater products, metal materials such as stainless steel are used as the shell of the heater for realizing high strength and high thermal conductivity of the shell, but for metals, an electrochemical energy field capable of scaling exists in a solid-liquid section, namely an even electric field, the even electric field is formed by two different substances which are in opposite contact and have different electrode potentials, and the influence on the positive and negative potentials of the wall of a water system pipeline and equipment is received by the material properties of the wall material and the environment condition; the potential of water is affected by the potential of the walls, the temperature of the water and the amount of ionic charge in the water. The larger the potential difference is, the larger the potential difference of the coupling layer is, the larger the energy of the coupling layer energy field is, and the negative electrode potential is always formed on one side of the wall, so that the scale is formed when mineral solute ions are adsorbed. As can be seen from the electrical signs of the calcium ion and carbonate ion examples, when these charged ions or ion clusters enter the attraction range of the coupling layer under the driving of water flow or thermal diffusion, the narrow distance (10-60 nm) of the coupling layer and the relatively high potential difference [ (0.01-0.1) + X ] V and the charge surface density of about 0.2V/cubic meter will make the positive and negative ions opposite at the coupling layer and make the electrons of the positive-going ions give up to an adjacent negative-going ion (or molecule), and then they will be arranged into a crystal and gradually form a crystal scale layer. Thus, fouling is primarily due to the presence of an electrochemical energy field in the water formed by charged mineral solute ions and the potential difference of the charged layer potential. The heat conductivity coefficient of the scale is about 4% -5% of that of stainless steel, when the scale is too thick, the heat of the heating body is difficult to timely transfer to the metal shell, and the dry burning reaction of the temperature switch to the heating body is too slow. In addition, metal scale becomes thicker gradually after long-term use, and water quality is also affected if the scale is not cleaned. If the daily cleaning is convenient, an additional structure is required to be added. Therefore, the metal material as a material with high melting point and high heat transfer efficiency can be used as the high-temperature-resistant heat transfer shell of the scheme, and when the metal material is used, a structure for preventing scale or facilitating scale cleaning needs to be attached, for example, a scale-preventing coating is coated on the inner wall of the metal shell.

For the high-temperature resistant heat transfer shell made of ceramics, the metal ceramic heating element dry burning detection method has unique advantages in the process of detecting the dry burning of the metal ceramic heating element, on one hand, the neutral surface characteristic of the metal ceramic heating element greatly reduces the adsorption capacity of scale, and self-cleaning can be realized under the action of daily high-speed liquid flow. In addition, the ceramic is formed by high-temperature sintering, has good high-temperature resistance, and can not be damaged under the high-temperature peak value generated after the metal ceramic heating body is powered off.

Preferably, a liquid inlet is formed in the side face of the shell main body at a position close to the overheating buffer section, a liquid outlet is formed in the side face of the shell main body at a position far away from the overheating buffer section, and the heating section is arranged along the direction from the liquid inlet to the liquid outlet.

Through adopting above-mentioned technical scheme, go into the liquid mouth when the influx chamber lets in liquid, because liquid has not passed through the heating yet, consequently this part of liquid is minimum at the relative temperature in the influx chamber, has the best cooling effect, can cool off the buffer section of overheating effectively, reduces the heat that the buffer section of overheating transmitted to ceramic case to protect the connection structure between ceramic case and the buffer section of overheating.

In addition, the section that generates heat sets up along the direction of going into the liquid mouth towards the liquid outlet for liquid can heat up gradually when flowing by going into the liquid mouth towards the liquid outlet direction, reaches the boiling until reaching in liquid outlet department, has reduced the production of liquid and the section that generates heat and carry out heat exchange in-process steam.

Preferably, the inner flow cavity is divided into a liquid heating section, a hydrothermal solution output section and a gasification buffer section which are continuously arranged, the heating section is located in the liquid heating section, the liquid inlet is communicated with the liquid heating section, and the liquid outlet is communicated with the hydrothermal solution output section.

Through adopting above-mentioned technical scheme, set up when going into liquid mouth low department, when the liquid outlet eminence sets up, liquid heats in liquid heating section, and the temperature rises gradually at ascending in-process, and is reaching the boiling point until the top of liquid heating section. Because the liquid at the lower part of the liquid heating section is contacted with the heating section to generate less or even no steam, the liquid at the lower part of the liquid heating section is well contacted with the heating section, and the heat transfer efficiency is high.

Because the liquid outlet is arranged between the liquid heating section and the gasification buffer section, when the liquid flow velocity fluctuates to generate steam for a short time, the steam can be stored in the gasification buffer section and cannot be sprayed out of the liquid outlet to cause the risk of sputtering of steam-carried liquid drops. After the velocity of the liquid flow has stabilized, the vapor in the gas buffer section will be absorbed by the liquid flow.

Preferably, the metal ceramic heating element is a tube body with a single end open, the metal ceramic heating element divides the liquid heating section into an inner heating flow channel and an outer heating flow channel, and a flow guide hole communicating the inner heating flow channel with the outer heating flow channel is formed in the side wall of the metal ceramic heating element, which is far away from the liquid inlet.

By adopting the technical scheme, the inner side surface and the outer side surface of the metal ceramic heating body form two heating surfaces, so that the heat exchange area of the metal ceramic heating body is increased, the liquid is divided into the inner part and the outer part, the heat exchange speed of the metal ceramic heating body is accelerated, the liquid is heated more quickly, and the risk of steam generation is reduced.

Preferably, the cermet heating element is a solid columnar body.

By adopting the technical scheme, the metal ceramic heating element can also be a solid columnar body, so that the metal ceramic heating element can be designed into a lower diameter model.

Preferably, the heating section includes the heat transfer ceramic body and sets up in the inside heating circuit of heat transfer ceramic body, the overheated buffering section includes the heat-resisting ceramic body and wears to locate the power supply line in the heat-resisting ceramic body, power supply line electric connection is in heating circuit.

Preferably, the shell main body is provided with a through hole, the overheating buffer section is arranged in the through hole in a penetrating manner, and a sealing element fixedly connected with the shell main body and the overheating buffer section is arranged in the through hole.

Preferably, the sealing member is a square block-shaped plug body, the overheating buffer section penetrates through the sealing member, the penetrating through hole is a square hole, and the sealing member is installed in the penetrating through hole and in interference fit with the penetrating through hole.

Preferably, the sealing member is a cylindrical plug body, the overheating buffering section penetrates through the sealing member, the penetrating through hole is a round hole, and the sealing member is installed in the penetrating through hole and in interference fit with the penetrating through hole.

By adopting the technical scheme, the sealing element is in tight contact with the metal ceramic heating element, the hole wall penetrating out of the through hole and the sealing glue through interference fit, so that stronger friction force and sealing property are generated.

Preferably, the lateral wall of sealing member is provided with the seal ring groove, the inner wall of wearing out the through-hole is provided with annular bead, annular bead joint is in the seal ring groove.

By adopting the technical scheme, when the hydraulic pressure in the inner flow cavity is large, the annular convex edge is abutted against the groove wall of the sealing ring groove, so that the liquid tightness is improved.

Preferably, the sealing element is a silica gel plug or a rubber plug.

Preferably, colloid is filled between the sealing element and the hole wall penetrating through the through hole.

Through adopting above-mentioned technical scheme, glue has further improved the leakproofness of sealing member to the through-hole of wearing out.

Preferably, the colloid is an epoxy resin adhesive.

Preferably, the housing body has a cylindrical or block shape. Preferably, the through hole is arranged on the end face of the shell main body, and the overheating buffer section is arranged in a cylindrical shape.

Preferably, the non-porous heat transfer portion is in a flat plate shape, an opening for accommodating the non-porous heat transfer portion is provided in a side surface of the case main body, an edge of the non-porous heat transfer portion is integrally connected to the case main body and closes the opening, and the temperature switch abuts against the non-porous heat transfer portion.

Through adopting above-mentioned technical scheme, sclausura heat transfer portion constitutes unified whole with the cooperation of casing main part, can be in process of production integrated into one piece, has improved the overall structure intensity of casing, has saved the use of sealing member simultaneously.

Preferably, the high-temperature-resistant heat transfer shell is an alumina ceramic shell.

Preferably, a liquid temperature sensor is installed inside the shell at the gasification buffer section.

Drawings

FIG. 1 is an overall schematic view of a liquid heat exchanger in a tank with a cermet heating element in an embodiment of the present application;

FIG. 2 is a sectional view of a liquid heat exchanger in a tank with a cermet heating element in an embodiment of the present application;

fig. 3 is an enlarged view at a in fig. 2.

Description of reference numerals:

1. a high temperature resistant heat transfer housing; 10. an internal flow cavity; 11. a liquid heating section; 12. a hot liquid output section; 13. a gasification buffer section; 14. a liquid inlet; 15. a liquid outlet; 16. an over-temperature detection zone; 171. a housing main body; 172. a non-porous heat transfer portion; 18. penetrating out of the through hole; 19. an annular rib;

2. a liquid temperature sensor;

3. a cermet heating element; 31. a heating section; 32. an overheat buffering section; 33. an internal heating flow channel; 34. adding a hot runner; 35. a flow guide hole;

5. a temperature switch; 6. a seal member; 61. and a sealing ring groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a liquid heat exchanger in a liner with a metal ceramic heating body. Referring to fig. 1 and 2, the heat-resistant and heat-conducting metal-ceramic composite heating element comprises a heat-resistant and heat-conducting outer shell 1 and a metal-ceramic heating element 3, wherein the heat-resistant and heat-conducting outer shell 1 is provided with an inner flow cavity 10 for liquid to pass through, and the metal-ceramic heating element 3 is arranged in the inner flow cavity 10 for heating the liquid in the inner flow cavity 10.

The high temperature resistant heat transfer housing 1 is made of a high melting point and high heat transfer efficiency material, which may be, but not limited to, a ceramic material, a stainless steel material or a copper alloy material, but any material with high thermal conductivity and pressure and high temperature resistance may be used, and preferably, the material is an alumina ceramic material in the present embodiment. The shape of the housing 1 can be square, cylindrical or other shapes, in this embodiment, the housing 1 is composed of a housing main body 171 and a non-porous heat transfer part 172 which are integrally connected, the housing main body 171 is cylindrical, and the axis needs to be rotated to vertical when in use. The non-porous heat transfer portion 172 has a flat plate shape, an opening for receiving the non-porous heat transfer portion 172 is provided on a side surface of the case main body 171, and an edge of the non-porous heat transfer portion 172 is integrally connected to the case main body 171 to close the opening.

The cermet heat-generating body 3 includes the section 31 and the overheated buffering section 32 of generating heat of body coupling, and the section 31 of generating heat includes the heat transfer ceramic body and sets up in the inside heating circuit of heat transfer ceramic body, and overheated buffering section 32 includes the heat-resistant ceramic body and wears to locate the power supply line in the heat-resistant ceramic body, and power supply line electric connection is in heating circuit. In the production process, the heat transfer ceramic body and the heat-resistant ceramic body are integrally sintered. Specifically, the heating circuit is formed by printing high-melting-point metal heating resistance slurry such as tungsten, molybdenum, manganese and the like on 92-96% of alumina casting ceramic green bodies and laminating the green bodies in a multilayer mode through 4-8% of sintering aids, the heat transfer ceramic body is usually alumina ceramic which is co-fired with the heating circuit into a whole at the high temperature of 1500-1600 ℃, and the heat resistance ceramic body can be fired by a material with a smaller heat conduction coefficient. Because the thermal resistance ceramic body has certain length, and just the same, the specific heat capacity of thermal resistance ceramic body and heat transfer ceramic body are close, and the thermal resistance ceramic body can absorb the heat that the heat transfer ceramic body transferred well to avoid overheated buffer section and high temperature resistant heat transfer shell's connecting piece to be burnt out, and is optional, in order to improve the protective capacities to this connecting piece, overheated buffer section 32 can suitably prolong when the design.

The inner side surface of the non-porous heat transfer part 172 is in thermal contact with the heating section 31, the outer side surface of the non-porous heat transfer part 172 is provided with a temperature switch 5, the temperature switch 5 is arranged on a power supply circuit of the metal ceramic heating element 3 and used for controlling the on-off state of the metal ceramic heating element 3, and the temperature switch 5 controls the on-off state of the metal ceramic heating element 3 based on whether the temperature of the non-porous heat transfer part 172 exceeds a temperature threshold value or not. In the present embodiment, the temperature switch 5 may be a KSD301 temperature switch, a fuse, or another type of temperature switch, as long as the temperature switch 5 can be powered off after the measured temperature exceeds the temperature threshold. For example, when the temperature of the non-porous heat transfer portion 172 exceeds a temperature threshold, the fuse is fused to cause the cermet heating element 3 to be electrically disconnected.

Alternatively, the cermet heating element 3 may be in various shapes such as a hollow square column, a solid square column, a hollow cylinder, a solid cylinder, a square tube, a circular tube, a multi-parallel column, a band gap multi-layer parallel plate, or the like, but may be in any shape having a large contact area with the liquid flow. In this embodiment, the cermet heating element 3 is a hollow round tubular object with one open end, and the wall of the cermet heating element 3 is provided with a diversion hole 35 communicating the inside and the outside of the cermet heating element 3.

The end face of the housing main body 171 is provided with a through hole 18, the through hole 18 is communicated with the inner flow cavity 10, the overheating buffer section 32 is arranged in the through hole 18 in a penetrating manner, and a sealing element 6 fixedly connecting the housing main body 171 and the overheating buffer section 32 is arranged in the through hole 18. In a possible embodiment, the through hole 18 is a circular hole, the sealing member 6 is a cylindrical plug body adapted to the through hole 18, the thermal buffering section 32 is inserted into the sealing member 6, and the sealing member 6 is installed in the through hole 18 and is in interference fit with the through hole 18. In another possible embodiment, the through hole 18 is a square hole, the sealing member 6 is a block-shaped plug body adapted to the through hole 18, the overheating buffer section 32 is inserted into the sealing member 6, the sealing member 6 is installed in the through hole 18 and the sealing member 6 is an interference fit with the through hole 18, and the sealing member 6 may be a rubber plug, a silicone plug or a plug body made of other materials, but the material has a certain elasticity so as to be capable of pressing against the wall of the hole after being inserted into the through hole 18. Optionally, the glue between the sealing element 6 and the wall of the hole penetrating through the through hole 18 may be, but not limited to, a food grade epoxy resin glue, but any glue that is harmless to the human body within a specified dosage.

In particular, in order to enhance the sealing effect of the sealing member 6, referring to fig. 3, the side wall of the sealing member 6 is provided with a sealing ring groove 61, the inner wall penetrating through the through hole 18 is provided with an annular rib 19, the annular rib 19 is integrally connected with the sealing member 6, and the shape of the annular rib 19 is matched with the sealing ring groove 61 and is clamped in the sealing ring groove 61.

The internal flow cavity 10 is divided into a liquid heating section 11, a hot liquid output section 12 and a gasification buffer section 13 which are continuously arranged, and when in use, the liquid heating section 11 is arranged at a low position and the gasification buffer section 13 is arranged at a high position for use. The heating section 31 is located in the liquid heating section 11, and the overheating buffer section 32 is assembled on the housing main body 171 and a part of the overheating buffer section penetrates into the liquid heating section 11 to be connected with the heating section 31. The side of the housing main body 171 is provided with a liquid inlet 14 at a position close to the overheat buffering section 32, the side of the housing main body 171 is provided with a liquid outlet 15 at a position far from the overheat buffering section 32, the heating section 31 is arranged along a direction from the liquid inlet 14 to the liquid outlet 15, and in this embodiment, the heating section 31 is arranged coaxially with the housing main body 171. The liquid inlet 14 is communicated with the liquid heating section 11, and the liquid outlet 15 is communicated with the hot liquid output section 12.

The cermet heating element 3 divides the liquid heating section 11 into an inner heating flow passage 33 and an outer heating flow passage 34, the guiding hole 35 communicates the inner heating flow passage 33 and the outer heating flow passage 34, and in this embodiment, the guiding hole 35 is opened on the side wall of the cermet heating element 3 away from the liquid inlet 14.

In addition, a liquid temperature sensor 2 is installed inside the casing main body 171 at the vaporization buffer section 13 for detecting the temperature of the liquid in the vaporization buffer section 13 and the hot liquid output section 12. The liquid inlet 14 is usually provided with a valve body for controlling the flow rate of the liquid, the liquid temperature sensor 2 is connected with a controller, and people can input different parameters into the controller to set different preset adjustable temperatures. When the temperature measured by the liquid temperature sensor 2 is higher than the preset adjustable temperature, the controller controls the valve body to increase the liquid inlet speed of the liquid inlet 14; when the temperature measured by the liquid temperature sensor 2 is lower than the preset adjustable temperature, the controller controls the valve body to reduce the liquid inlet speed of the liquid inlet 14.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (13)

1. The utility model provides a liquid heat exchanger in courage with cermet heat-generating body, its characterized in that, including high temperature resistant heat transfer shell (1) and cermet heat-generating body (3), high temperature resistant heat transfer shell (1) is equipped with interior flow chamber (10) that supply liquid to pass through, cermet heat-generating body (3) are including heating section (31) and overheat buffering section (32) of body coupling, heating section (31) are located interior flow chamber (10), high temperature resistant heat transfer shell (1) comprises shell main part (171) and sclausura heat transfer portion (172) of body coupling, overheat buffering section (32) are assembled on shell main part (171), the medial surface thermal contact of sclausura heat transfer portion (172) is in heating section (31), temperature switch (5) are installed to the lateral surface of sclausura heat transfer portion (172), whether temperature switch (5) exceed the temperature threshold based on sclausura heat transfer portion (172) with control cermet heat-generating body (3) break electricity.

2. The liquid heat exchanger with a heating element of cermet in inner container as claimed in claim 1, characterized in that the side of said main housing (171) is provided with a liquid inlet (14) near the overheating buffer section (32), the side of said main housing (171) is provided with a liquid outlet (15) far from the overheating buffer section (32), and said heating section (31) is disposed along the direction from the liquid inlet (14) to the liquid outlet (15).

3. The liquid heat exchanger with a metal ceramic heating element in a liner is characterized in that the inner flow cavity (10) is divided into a liquid heating section (11), a hot liquid output section (12) and a gasification buffer section (13) which are continuously arranged, the heating section (31) is positioned in the liquid heating section (11), the liquid inlet (14) is communicated with the liquid heating section (11), and the liquid outlet (15) is communicated with the hot liquid output section (12).

4. The liquid heat exchanger with a liner of a cermet heating element as claimed in claim 3, wherein the cermet heating element (3) is a tube with a single end open, the cermet heating element (3) divides the liquid heating section (11) into an inner heating flow channel (33) and an outer heating flow channel (34), and a flow guide hole (35) communicating the inner heating flow channel (33) and the outer heating flow channel (34) is opened on the side wall of the cermet heating element (3) departing from the liquid inlet (14).

5. The liquid heat exchanger with a heating element made of cermet in inner container according to any one of claims 1 to 3 characterized in that the heating element made of cermet (3) is a solid column.

6. The liquid heat exchanger with a heating element of cermet inside container as claimed in claim 1, characterized in that the heat transfer case (1) of high temperature resistance is a ceramic case or a stainless steel case or a copper alloy case.

7. The liquid heat exchanger with a heating element of cermet in inner container according to claim 1 is characterized in that the shell main body (171) is opened with a through hole (18), the overheating buffer section (32) is inserted in the through hole (18), and a sealing member (6) fixedly connecting the shell main body (171) and the overheating buffer section (32) is arranged in the through hole (18).

8. The liquid heat exchanger with a metal ceramic heating element in a liner is characterized in that the sealing member (6) is a block-shaped or cylindrical plug body, the overheating buffer section (32) penetrates through the sealing member (6), the shape of the penetrating through hole (18) is matched with that of the sealing member, and the sealing member (6) is installed in the penetrating through hole (18) and is in interference fit with the penetrating through hole (18).

9. The liquid heat exchanger with a heating body made of cermet in inner container as claimed in claim 8 characterized in that the side wall of said sealing member (6) is provided with a sealing ring groove (61), the inner wall penetrating through hole (18) is provided with an annular rib (19), said annular rib (19) is snapped in the sealing ring groove (61).

10. The liquid heat exchanger with a heating element of cermet in inner container as claimed in claim 7, characterized in that the colloid is filled between the sealing member (6) and the wall of the hole penetrating through the through hole (18).

11. The liquid heat exchanger with a heating element of cermet inside container as claimed in claim 7, characterized in that the case main body (171) is cylindrical or square.

12. The liquid heat exchanger with a heating element of cermet inside a bladder as described in claim 1 wherein said imperforate heat transfer portion (172) is flat plate-like, the side of said case body (171) is provided with an opening for housing said imperforate heat transfer portion (172), the edge of said imperforate heat transfer portion (172) is integrally connected to said case body (171) and closes the opening, said temperature switch (5) is abutted on said imperforate heat transfer portion (172).

13. The liquid heat exchanger with a heating element of cermet in inner container according to claim 3 is characterized in that the liquid temperature sensor (2) is installed inside the shell main body (171) at the vaporization buffer section (13).

Images