CN103743093B - Ptc liquid heater - Google Patents

Abstract

A PTC liquid heater belongs to the technical field of liquid heating devices. Including the heater body, a liquid heating chamber is formed in the center, left and right covers are arranged on the left and right ends of the heater body, and PTC element installation chambers are formed on the front and rear side walls of the heater body, and the installation chamber is equipped with PTC element; the liquid inlet interface is set on the right cover and communicates with the liquid heating chamber; the liquid outlet interface is set on either the left cover or the top wall of the heater body, and the bottom wall of the heater body It is composed of a heater body mounting wall, and features: on the cavity wall of the liquid heating cavity and along the length direction of the liquid heating cavity, a group of heating cavity cooling fins protruding from the surface of the cavity wall of the liquid heating cavity are formed at intervals. Good heat dissipation effect, high heating efficiency, energy saving and material saving; prevent the heater body from bursting, safe to use; will not damage the PTC element when pressure is applied to the top wall and bottom wall of the cavity; the intelligent effect is good.

Description

PTC liquid heater

technical field

The invention belongs to the technical field of liquid heating devices, and in particular relates to a PTC liquid heater, which is applied to cookers such as kitchen utensils such as range hoods, and provides support for a pipeline connected to it at one end and with a nozzle at the other end. The centrifugal impeller of the range hood implements hot water or steam for cleaning.

Background technique

The PTC mentioned above refers to a positive temperature coefficient thermistor, and the PTC liquid heater mentioned above refers to a heating facility that uses PTC to heat up liquid (mainly water). Technical information about PTC liquid heaters can be found in published Chinese patent documents, typically such as "A PTC Liquid Heater" recommended by Utility Model Patent Grant No. CN201476268U and "A PTC Liquid Heater" provided by CN201937849U ". The structural feature of these two patents is that a liquid heating cavity (the patent is called a longitudinal channel) is formed in the center of the length direction of the heater body (both patents are called profiled aluminum, that is, an aluminum profile) from one end to the other end. And between the heater body and the liquid heating chamber, a PTC installation chamber (patent called longitudinal through hole) is formed, and a PTC element is arranged in the PTC installation chamber. When in use, the PTC element is energized and is in the state of heating the liquid heating chamber, so that the liquid introduced from one end of the liquid heating chamber becomes the liquid at the required temperature when it is drawn out from the other end, that is to say, the liquid flowing through the liquid heating chamber The room temperature liquid reaches the desired temperature.

Although the above two patent schemes each have the technical effect of the technical effect column of the specification (see paragraph 10 of the specification of CN201476268U and paragraph 8 of the specification of CN201937849U), there are the following disadvantages: First, due to the length direction of the heater body The wall of the central liquid heating chamber is smooth, so on the one hand, it will affect the heating effect of the liquid flowing through the liquid heating chamber, on the other hand, the heating efficiency is low enough to save power consumption, and on the other hand, it will cause production heating. Second, it is unsafe, because when the liquid in the liquid heating chamber is vaporized, steam will be generated, and the pressure in the liquid heating chamber will suddenly rise, so if the liquid in the heating chamber cannot be timely If the steam pressure of the PTC element is released, it will cause the heater body to burst and endanger property and personal safety. Appropriately pressurize the bottom wall of the cavity, so that the material of the top wall and the bottom wall of the cavity is moderately deformed and extended, so as to limit the PTC element, so as to prevent the PTC element from moving out of the PTC installation cavity during use and ensure the PTC element Due to the unreasonable structure of the top wall and bottom wall of the heater body when the pressure is applied to the top wall and bottom wall of the cavity, it is easy to appear the following undesired There are two situations: one is that when pressure is applied to the top wall and bottom wall of the cavity, the top wall and bottom wall of the cavity are not easily deformed, so that the limitation of the PTC element is unreliable; the other is that if the pressure is too large, the top wall and bottom of the cavity Although the deformation of the wall can be reflected, there is a risk of damage to the relatively fragile PTC components with pressure resistance; Fourth, due to the lack of comprehensive safety measures, there is inevitably blindness in actual use. For example, it is difficult to understand the liquid heating chamber in real time. The temperature of the liquid in the heater cannot be grasped in time on the surface temperature of the heater body.

In view of the above prior art, it is necessary to make reasonable improvements. For this reason, the applicant has made a beneficial design, formed the technical scheme to be introduced below, and under the security measures, simulated it in the applicant's laboratory The test results proved to be feasible.

Contents of the invention

The primary task of the present invention is to provide a PTC liquid heater that helps to optimize the structure of the liquid heating chamber of the heater body, thereby improving heating efficiency, saving power consumption and saving materials for making the heater body.

Another task of the present invention is to provide a PTC liquid heater which is beneficial to release the pressure in the liquid heating chamber when it exceeds the set value, so as to avoid the explosion of the heater body and ensure the safety of property and personal.

Another task of the present invention is to provide a structure that is beneficial to improve the structural rationality of the top wall and the bottom wall of the heater body so as to reflect the reliable limitation of the PTC element in the PTC element installation cavity and avoid damage to the PTC element. PTC liquid heater.

Another task of the present invention is to provide a PTC liquid heater which is convenient for controlling the temperature of the liquid in the liquid heating chamber and the surface temperature of the heater body so as to reflect the effect of safety and intelligence.

In order to embody the primary task of completing the present invention, the technical solution provided by the present invention is: a PTC liquid heater, comprising a heater body, forming a liquid heating cavity in the center of the heater body in the length direction, and forming a liquid heating cavity in the heater body A left cover is provided at the left end of the heater body and at a position corresponding to the left cavity opening of the liquid heating chamber, and a right cover is provided at the right end of the heater body and at a position corresponding to the right cavity opening of the liquid heating cavity, and The front side wall and the rear side wall in the length direction of the heater body each form a PTC element installation cavity, and a PTC element is arranged in each PTC element installation cavity; a liquid inlet port, which is arranged on the right On the cover, and communicated with the liquid heating chamber; a liquid outlet port, the liquid outlet port is set on either of the left cover and the top wall of the heater body, and connected to the liquid The heating chambers are connected, wherein: the bottom wall of the heater body is formed as a heater body installation wall, and the feature is that a group of protrusions are formed at intervals on the chamber wall of the liquid heating chamber and along the length direction of the liquid heating chamber The cooling fins of the heating chamber are located on the surface of the chamber wall of the liquid heating chamber.

In order to achieve another task of the present invention, the technical solution provided by the present invention is: a pressure release mechanism installation hole is provided on the top wall of the heater body, and the pressure release mechanism installation hole is connected with the liquid heating The cavity communicates with each other, and a pressure release mechanism is installed on the pressure release mechanism installation hole.

In order to accomplish another task of the present invention, the technical solution provided by the present invention is: the two sides in the length direction of the top wall of the heater body are respectively formed as the cavity top wall of the PTC installation cavity, and on the cavity top wall There is a cavity top wall easily deformable groove between the top wall; the two sides of the bottom wall of the heater body in the length direction are respectively formed as the cavity bottom wall of the PTC installation cavity, and between the cavity bottom wall and the bottom wall An easily deformable groove on the bottom wall of a cavity is formed between them.

In order to accomplish another task of the present invention, the technical solution provided by the present invention is: a temperature sensor for sensing the temperature of the liquid in the liquid heating chamber and a temperature sensor for sensing the temperature of the liquid in the liquid heating chamber are arranged on the top wall of the heater body A temperature controller that controls the surface temperature of the heater body.

In a specific embodiment of the present invention, the set of cooling fins of the heating chamber are formed on the wall of the liquid heating chamber in a radiating state.

In another specific embodiment of the present invention, a first electrode is combined on one side of the PTC element, and a second electrode is combined on the other side, wherein: when the first electrode passes through the first electrode When the lead wire is connected to the control power supply, the second electrode is connected to the temperature controller through the second electrode lead wire; when the first electrode is connected to the temperature controller through the first electrode lead wire , the second electrode is connected to the control power supply through the second electrode lead wire.

In yet another specific embodiment of the present invention, the PTC element is wrapped with an insulating film, and the insulating film is a polyimide film or a polyester film.

In yet another specific embodiment of the present invention, the cross-sectional shapes of the cavity top wall and the cavity bottom wall are both U-shaped, and the easily deformable grooves of the cavity top wall and the cavity bottom wall are The cross-sectional shapes are all V-shaped.

In yet another specific embodiment of the present invention, the left cover is brazed and fixed to the left end face of the heater body at a position corresponding to the left cavity opening of the liquid heating cavity; The cover is brazed and fixed to the right end surface of the heater body at a position corresponding to the right cavity opening of the liquid heating cavity.

In a further specific embodiment of the present invention, the pressure release mechanism includes a valve body, a steel ball, a spring, and a pressure adjustment screw. The end of the valve body facing the installation hole of the pressure release mechanism forms a stud. The stud is fixed to the mounting hole of the pressure release mechanism, and the steel ball, spring and pressure adjustment screw are sequentially arranged in the valve body cavity of the valve body. A pressure relief hole is opened at the center of the bottom of the valve body cavity, and the pressure relief hole is heated with the liquid. The cavity is connected, the steel ball corresponds to the pressure relief hole and matches with the pressure relief hole, the upper end of the spring is supported on the pressure adjustment screw, and the lower end of the spring is supported on the steel ball, the pressure adjustment screw is threaded with the cavity wall of the valve body cavity Cooperate.

Compared with one of the technical effects of the prior art, the technical solution provided by the present invention is that a group of cooling fins in the heating cavity are formed on the cavity wall of the liquid heating cavity, so that the cooling effect can be significantly improved, and the cooling effect of the liquid in the liquid heating cavity can be improved. High heating efficiency, saving electric energy consumption and also saving materials used to make the heater body; second, because the pressure release mechanism is set on the top wall, it can prevent the heater body from bursting and ensure the user's property and personal safety ; three, since the both sides of the length direction of the top wall and the both sides of the length direction of the bottom wall are respectively formed as the cavity top wall and the cavity bottom wall of the PTC element installation cavity, and the cavity top wall and the top wall are formed between the cavity top wall and the top wall. The easy-to-deform groove on the top wall of the cavity forms the easy-to-deform groove on the bottom wall of the cavity between the bottom wall of the cavity and the bottom wall of the cavity. The PTC element will not be damaged when the element is limited; fourth, due to the installation of a temperature sensor for sensing the liquid temperature in the liquid heating chamber and a temperature controller for sensing the surface temperature of the heater body, it can reflect ideal safety , and can reflect the intelligent effect.

Description of drawings

Fig. 1 is a structural diagram of an embodiment of the present invention.

detailed description

In order to enable the examiners of the patent office, especially the public, to understand the technical essence and beneficial effects of the present invention more clearly, the applicant will describe in detail the following in the form of examples, but none of the descriptions to the examples is an explanation of the solutions of the present invention. Any equivalent transformation made according to the concept of the present invention which is merely formal but not substantive shall be regarded as the scope of the technical solution of the present invention.

In the following descriptions, all directional concepts such as up, down, left, right, front and back are aimed at the position state shown in Figure 1, and the purpose is to facilitate public interpretation, so it cannot be understood based on this For the limitation of the scheme of the present invention.

Referring to Fig. 1, a heater body 1 preferably made of a material with good heat conduction (heat transfer) effect such as aluminum or aluminum alloy or other similar materials such as copper is provided. In this embodiment, the heater body 1 is extruded from aluminum extruded material through a die, and a liquid heating chamber 11 is formed in the center of the heater body 1 in the longitudinal direction. As shown in the figure, the outer contour of the cross-sectional shape of the heater body 1 is rectangular, and the liquid The cross-sectional shape of the heating chamber 11 is circular. On the left end face of the heater body 1 and at the position corresponding to the left cavity of the liquid heater cavity 11, a left cover 12 is fixed by brazing and welding, and the left cavity of the liquid heating cavity 11 is fixed by the left cover 12. Sealing; on the right end face of the heater body 1 and at the position corresponding to the right cavity mouth of the liquid heating cavity 11, a right cover 13 is fixed by brazing and welding, and the right cover 13 is connected to the right side of the liquid heating cavity 11. The cavity is sealed. The front wall (also called the front side wall) and the rear wall (also called the rear side wall) in the length direction of the heater body 1 each form a PTC element installation cavity 14 (also called the PTC heating cavity). The PTC element 2 is arranged in the installation cavity 14 .

A liquid inlet port 3 is given, which is fixed on the aforementioned right cover 13 and communicated with the liquid heating chamber 11. In the state of use, the liquid inlet port 3 is connected to the water source pipeline (on the water source pipeline Equipped with solenoid valve). A liquid outlet interface 4 is provided. In this embodiment, the liquid outlet interface 4 is arranged at the left end of the top wall 15 of the heater body in the longitudinal direction, specifically: a The gasket sealing cavity 153 sunken on the surface of the top wall has a liquid outlet interface matching hole 1531 at the center of the gasket sealing cavity 153, and the liquid outlet interface 4 is threadedly connected with the liquid outlet matching hole 153 to heat the liquid. The cavity 11 communicates and is sealed by a sealing gasket 1532 disposed in the gasket sealing cavity 153 . In the state of use, one end of a liquid outlet pipe is plugged and fitted on the liquid outlet port 4, and the other end of the liquid outlet pipe is equipped with a nozzle, and the centrifugal fan blade of the range hood, that is, the impeller, is sprayed with heat for cleaning by the nozzle. water or steam.

As shown in the figure, the bottom wall 16 of the aforementioned heater body 1 constitutes a heater body installation wall, which can be fixed to the range hood by the fixed studs 162 preset on the bottom wall 16 during use.

What the applicant needs to explain is: if the above-mentioned liquid outlet port 4 is fixed on the left cover 12 and communicated with the liquid heating chamber 11, it should be regarded as the scope of the technical content disclosed by the present invention and be protected by the present invention. Because the position change of the liquid outlet interface 4 belongs to the form rather than the substantial change. Likewise, if the aforementioned liquid inlet port 3 is shifted to the right end of the length direction of the top wall 15 for the purpose of circumvention, it should be regarded as an equivalent replacement.

As the technical gist of the technical solution provided by the present invention: on the cavity wall of the aforementioned liquid heating cavity 11 and along the length direction of the liquid heating cavity 11, a group of holes protruding from the cavity wall surface of the liquid heating cavity 11 are formed at intervals. The heat dissipation fins 111 of the heating chamber, when the PTC element 2 installed in the PTC element installation chamber 14 is in the state of being energized and working, the liquid (the liquid is water) in the liquid heating chamber 11 is heated by the heat dissipation fins 111 of the heating chamber .

Preferably, the aforesaid set of cooling fins 111 in the heating chamber are formed on the chamber wall of the liquid heating chamber 11 in a radiating state, and the liquid heating chamber 11 of this structure fulfills the technology described by the applicant in the above technical effect column One of the effects.

A pressure release mechanism installation hole 151 is opened on the top wall 15 of the heater body 1. The pressure release mechanism installation hole 151 communicates with the liquid heating chamber 11 and is a screw hole. Agency 5.

The preferred but not absolutely limited structure of the above-mentioned pressure release mechanism 5 is as follows: comprising a valve body 51, a steel ball 52, a spring 53 and a pressure adjustment screw 54, the end of the valve body 51 facing the pressure release mechanism mounting hole 151 forms a screw Column 511, the stud 511 is threadedly fixed with the mounting hole 151 of the pressure release mechanism, and is sealed by the sealing ring 5111, the steel ball 52, the spring 53 and the pressure adjusting screw 54 are sequentially arranged in the valve body cavity 512 of the valve body 51, the valve body cavity The central position of the bottom of 512 is provided with a pressure relief hole 5121, and the pressure relief hole 5121 communicates with the liquid heating chamber 11. The upper end is supported on the pressure adjusting screw 54 , while the lower end of the spring 53 is supported on the steel ball 52 , and the pressure adjusting screw 54 is threadedly engaged with the cavity wall of the valve body cavity 512 . By adjusting the pressure adjustment screw 54 (clockwise or counterclockwise adjustment), the pressure adjustment screw 54 makes the spring 53 compressed or stretched, that is to say, the force of the spring 53 acting on the steel ball 52 is changed, so as to achieve Adjustment of the pressure value of the pressure release mechanism 5 (the industry habit is called the threshold value). When the pressure in the liquid heating chamber 11 is greater than the force exerted by the spring 53 on the steel ball 52, the steel ball 52 is lifted up by the pressure, and the pressure steam in the liquid heating chamber 11 enters the valve body chamber 512 through the pressure relief hole 5121. The body cavity 512 communicates with the outside world, so the pressure steam entering the valve body cavity 512 is discharged to the outside world. Such a structure can confirm the second technical effect described by the applicant in the technical effect column above.

Please continue to see Fig. 1, both sides of the lengthwise direction of the top wall 15 of the aforementioned heater body 1 and at positions corresponding to the top of the PTC element installation cavity 14 respectively constitute the cavity top wall 152 of the PTC element installation cavity 14, and Between the cavity top wall 152 and the top wall 15 (the junction part) is formed a cavity top wall easily deformable groove 1521; The positions of the bottoms constitute the cavity bottom wall 161 of the PTC component installation cavity 14, and a cavity bottom wall easily deformable groove 1611 is formed between the cavity bottom wall 161 and the bottom wall 16 (the bordering part). Preferably, the cross-sectional shape of the cavity top wall 152 and the cavity bottom wall 161 is U-shaped (also called a semicircle), and the cross-sectional shape of the cavity top wall easily deformable groove 1521 and the cavity bottom wall easily deformable groove 1611 is All are V-shaped.

The shapes of the cavity top wall 152 and the cavity bottom wall 161 help to define the PTC element 2 installed in the PTC element installation cavity 14. Specifically, when the PTC element 2 is installed in the PTC element installation cavity 14, as long as at the same time Applying pressure to the cavity top wall 152 and the cavity bottom wall 161 can cause the PTC element 2 to be confined in the PTC element installation cavity 14 by the slight ductility or deformation of the material of the heater body 1 . Due to the existence of the easily deformable groove 1521 on the top wall of the cavity and the easily deformable groove 1611 on the bottom wall of the cavity, as long as the pressure is applied to the top wall 152 and the bottom wall 161 of the cavity with a small force, the relative compressive strength will not be damaged. The fragile PTC element 2 confirms the third technical effect recorded by the applicant in the above technical effect column.

The top wall 15 of the aforementioned heater body 1 is provided with a temperature sensor 6 and a temperature controller 7, the temperature of the liquid in the liquid heating chamber 11 is sensed by the temperature sensor 6, and the surface of the heater body 1 is detected by the temperature controller 7 Temperature, the temperature controller 7 is fixed with the top wall 15 at a position corresponding to the screw hole 154 preset on the top wall 15 with a screw 72, and the setting of these two parts can fulfill the applicant's description in the above technical effect column The fourth technical effect.

According to professional knowledge, an electric controller is usually installed on the range hood, so the aforementioned temperature sensor 6 is connected by the sensor line female plug on the sensor line 61 and the temperature controller 7 is connected by the temperature controller line female plug on the temperature controller line 71. The plug 711 is electrically connected with the electric controller.

The surface of one side of the above-mentioned PTC element 2 is combined with a first electrode 21, and the surface of the other side is combined with a second electrode 22, wherein: when the first electrode 21 is connected to the control power supply through the first electrode lead-out line 211 , then the second electrode 22 is connected to the aforementioned temperature controller 7 through the second electrode lead-out line 221; The electrode lead wire 221 is connected to the control power supply. In this embodiment, the former is selected, and the first electrode lead wire 211 is plugged and matched with the electric controller of the range hood mentioned above through the power plug 2111, and the second electrode lead wire is connected to the control power supply. 221 is plugged and matched with the temperature controller 7 through the electrode lead wire plug 2211.

Preferably, the aforementioned PTC element 2 is wrapped with an insulating film 23, and the insulating film 23 is preferably a polyimide film or a polyester film, but the use of other insulating films with similar properties is not excluded.

The applicant briefly describes the use of the present invention. Assuming that the present invention is installed on a range hood as a kitchen utensil, when cleaning the centrifugal blades of the range hood, the electric controller installed on the range hood The operation panel is operated, and the liquid for cleaning is introduced into the liquid heating chamber 11 through the liquid inlet port 3, that is, tap water is introduced, and the PTC element 2 is in a power-on state, and the heat generated by the PTC element 2 is transferred to the liquid heating chamber in the form of heat transfer. The cavity 11, specifically, heats the liquid in the liquid heating cavity 11 by heat radiation from the heater cooling fins 111 in the liquid heating cavity 11, and when the temperature sensor 6 senses that the liquid reaches a set value, it feeds back a signal to the electrical The controller sends instructions from the electrical controller to open the solenoid valve on the pipeline connected to the liquid outlet 4, and the nozzle on the pipeline sprays the liquid (heated water) to the centrifugal fan blade of the range hood That is, the impeller, so that the operator can clean the impeller. When there is overpressure in the liquid heating chamber 11 (exceeding the set value of the pressure release mechanism 5), the pressure will be released as described above by the applicant. When the surface temperature of the heater body 1 exceeds the set value of the temperature controller 7 , then the temperature controller 7 feeds back the signal to the electrical controller, and the electrical controller issues an instruction to suspend the work of the PTC element 2, or to allow the liquid inlet port 3 to enter liquid. The water or steam drawn from the liquid outlet interface 4 is determined by the electrical controller.

In summary, since the technical solution provided by the present invention overcomes the deficiencies in the prior art, completes the invention task, and fully embodies the technical effect described by the applicant in the technical effect column, it can be regarded as an ultimate technology Program.

Claims (9)

1. a PTC liquid heater, comprise a heater body (1), a heating liquid chamber (11) is configured with in the central authorities of the length direction of this heater body (1), heater body (1) left end and be equipped with a left sealing cap (12) in the position of left accent corresponding to heating liquid chamber (11), and heater body (1) right-hand member and be equipped with a right aling cap (13) in the position of right accent corresponding to heating liquid chamber (11), and be respectively configured with a PTC element installation cavity (14) at the front side wall of the length direction of heater body (1) and rear wall, PTC element (2) is provided with in each PTC element installation cavity (14), one feed liquor interface (3), this feed liquor interface (3) is arranged on described right aling cap (13), and communicates with described heating liquid chamber (11), one goes out liquid interface (4), this go out liquid interface (4) be arranged on described left sealing cap (12) and heater body (1) roof (15) both appoint select on one, and communicate with described heating liquid chamber (11), wherein: the diapire (16) of heater body (1) is configured to heater body assembly wall, it is characterized in that: on the chamber wall of described heating liquid chamber (11) and along the length direction of heating liquid chamber (11), be configured with space state the heating chamber radiating fin (111) that a group is raised in the chamber wall surface in heating liquid chamber (11), the described roof (15) of described heater body (1) offers a pressure release mechanism installing hole (151), this pressure release mechanism installing hole (151) communicates with described heating liquid chamber (11), and on this pressure release mechanism installing hole (151), a pressure release mechanism (5) is installed.

2. PTC liquid heater according to claim 1, it is characterized in that the both sides of the length direction of the roof (15) of described heater body (1) are respectively configured to the chamber roof (152) of described PTC installation cavity (14), and be configured with the yielding groove of a chamber roof (1521) between chamber roof (152) and roof (15); The both sides of the length direction of the diapire (16) of described heater body (1) are respectively configured to the chamber diapire (161) of described PTC installation cavity (14), and are configured with the yielding groove of a chamber diapire (1611) between chamber diapire (161) and diapire (16).

3. PTC liquid heater according to claim 1, is characterized in that being provided with on the roof (15) of described heater body (1) one for the temperature sensor (6) and of the fluid temperature in heating liquid chamber (11) described in perception for the temperature controller (7) of the surface temperature of control heater body (1).

4. PTC liquid heater according to claim 1, is characterized in that one group of described heating chamber radiating fin (111) is formed on the chamber wall of described heating liquid chamber (11) with radiation regimes.

5. PTC liquid heater according to claim 3, it is characterized in that being combined with the first electrode (21) in the side of described PTC element (2), and opposite side is combined with the second electrode (22), wherein: when described the first electrode (21) is connected with control power supply by the first electrode outlet line (211), described the second electrode (22) is connected with described temperature controller (7) by the second electrode outlet line (221); When described the first electrode (21) is connected with described temperature controller (7) by the first electrode outlet line (211), described the second electrode (22) is connected with control power supply by the second electrode outlet line (221).

6. PTC liquid heater according to claim 1, it is characterized in that being wrapped with insulation film (23) at described PTC element (2), insulation film (23) is Kapton or polyester film.

7. PTC liquid heater according to claim 2, it is characterized in that the shape of cross section of described chamber roof (152) and chamber diapire (161) is all in U-shaped, the described yielding groove of chamber roof (1521) and the shape of cross section of the yielding groove of chamber diapire (1611) are all in the shape of the letter V.

8. PTC liquid heater according to claim 1, is characterized in that the position of left accent and the left end end face soldering of described heater body (1) that described left sealing cap (12) is corresponding to described heating liquid chamber (11) are fixed; The position of right accent and the right-hand member end face soldering of heater body (1) that described right aling cap (13) is corresponding to heating liquid chamber (11) are fixed.

9. PTC liquid heater according to claim 1, it is characterized in that described pressure release mechanism (5) comprises valve body (51), steel ball (52), spring (53) and pressure-adjusting screw (54), valve body (51) is configured with a stud (511) towards one end of described pressure release mechanism installing hole (151), this stud (511) is fixed with pressure release mechanism installing hole (151), steel ball (52), spring (53) and pressure-adjusting screw (54) are successively set in the valve body chamber (512) of valve body (51), the middle position of the bottom in valve body chamber (512) offers a relief hole (5121), this relief hole (5121) communicates with described heating liquid chamber (11), described steel ball (52) is corresponding to relief hole (1512) and match with relief hole (1512), the upper end of spring (53) is bearing on pressure-adjusting screw (54), and the lower end of spring (53) is bearing on steel ball (52), the chamber wall threaded engagement in pressure-adjusting screw (54) and valve body chamber (512).