CN219876157U

CN219876157U - PTC electric heater

Info

Publication number: CN219876157U
Application number: CN202320791690.1U
Authority: CN
Inventors: 李�浩; 门少杰; 张磊; 宋希瑞
Original assignee: New Nanfeng Thermo & Comfort Cangzhou Co ltd
Current assignee: New Nanfeng Thermo & Comfort Cangzhou Co ltd
Priority date: 2023-04-11
Filing date: 2023-04-11
Publication date: 2023-10-20
Anticipated expiration: 2033-04-11

Abstract

The utility model provides a PTC electric heater, which comprises a heating component, a shell, a gas exchange valve and a retraction component, wherein the heating component is provided with a plurality of metal pipes; the inside of the shell is provided with a containing cavity, the heating component is arranged in the containing cavity, a gas guide cavity is arranged between the heating component and the shell, each metal pipe is communicated with the gas guide cavity, and the shell is provided with a mounting hole; the air exchanging valve is inserted into the mounting hole, and the air guiding cavity is communicated with the external space of the shell through the air exchanging valve; the locking component is arranged between the ventilation valve and the shell, and when the locking component locks, the ventilation valve and the shell are relatively fixed; when the locking component is unlocked, the air exchange valve is unlocked and fixed with the shell relatively. According to the utility model, the ventilation valve is arranged on the shell, so that the metal pipe inside the heating assembly can be communicated with the space outside the shell through the ventilation valve, and compared with a completely sealed environment, the working performance of the heating assembly is effectively improved in an aerobic environment, and meanwhile, the installation and the disassembly of the ventilation valve on the shell are more convenient through the locking assembly.

Description

PTC electric heater

Technical Field

The utility model belongs to the technical field of heating equipment, and particularly relates to a PTC electric heater.

Background

The PTC heater is also called a PTC heater and is composed of a PTC ceramic heating element and an aluminum tube. The PTC heater has the advantages of small thermal resistance and high heat exchange efficiency, and is an automatic constant-temperature and electricity-saving electric heater. The special electric heating tube type heater has the outstanding characteristics that the special electric heating tube type heater has no surface reddening phenomenon under any application condition in terms of safety performance, thereby causing potential safety hazards such as scalding, fire disaster and the like.

However, in the prior art, since the protection level of the heating element is high, at least IP67 is reached, the internal core is in a sealed working environment, and various working performances of the internal heating component are affected.

Disclosure of Invention

The utility model aims to provide PTC electric heating so as to improve the relative stability of insulation and pressure resistance of a heating component, slow down power attenuation and prolong the service life.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the PTC electric heater comprises a heating component, a shell, a gas exchange valve and a retracting component, wherein the heating component is provided with a plurality of metal pipes; the inside of the shell is provided with a containing cavity, the heating assembly is arranged in the containing cavity, an air guide cavity is arranged between the heating assembly and the shell, each metal pipe is communicated with the air guide cavity, and the shell is provided with a mounting hole; the air exchange valve is inserted into the mounting hole, and the air guide cavity is communicated with the external space of the shell through the air exchange valve; the locking component is arranged between the air exchange valve and the shell, and when the locking component is locked, the air exchange valve and the shell are relatively fixed; when the locking component is unlocked, the air exchange valve and the shell are unlocked and fixed relatively.

In one possible implementation manner, the locking assembly includes a clamping plate and a clamping block, the clamping plate is slidably disposed at one end of the gas exchange valve, the clamping block is disposed at the other end of the gas exchange valve, and the clamping plate can be partially disposed at the outer side of the side wall of the gas exchange valve due to sliding, or completely disposed at the inner side of the side wall of the gas exchange valve due to sliding.

In one possible implementation manner, one end of the gas exchange valve is provided with a plurality of fixing plates, a reset spring is arranged on each fixing plate, the clamping plate is connected with the reset spring, a sliding groove is arranged on the end face of the gas exchange valve, a sliding block is arranged on the bottom face of the clamping plate, the sliding block is inserted into the sliding groove, and when the reset spring is in a natural state, part of the clamping plate extends out of the side wall of the gas exchange valve.

In one possible implementation manner, the clamping plate comprises two symmetrically arranged left and right, the PTC electric heater further comprises an unlocking component, the unlocking component comprises an unlocking rope and an unlocking Kong Hejie locking rod, the unlocking rope is connected to two opposite arranged ends of the clamping plate, the unlocking hole is formed in the air exchanging valve, the unlocking rod is slidably arranged in the unlocking hole, the unlocking rod can push the unlocking rope to move due to sliding, and the unlocking rope can drive the clamping plate to be retracted to the inner side of the side wall of the air exchanging valve.

In one possible implementation, the unlocking hole includes a large-diameter section and a small-diameter section, and the large-diameter section is arranged on one side close to the clamping plate; the unlocking rod comprises a large-diameter rod and a small-diameter rod, and the large-diameter rod is inserted into the large-diameter section.

In one possible implementation manner, the ventilation valve includes a valve body and two air holes, both of which are disposed on the valve body, air outside the housing can enter the air guide cavity through one of the air holes, and air in the air guide cavity can be discharged outside the housing through the other air hole.

In a possible implementation manner, the valve body is cylindrical, the air holes comprise a first air hole and a second air hole, the first air hole, the second air hole and the valve body are axially arranged in parallel, the first air hole and the second air hole are arranged at intervals, one end of the first air hole is communicated with the air guide cavity, the other end of the first air hole is communicated with the outer space of the shell, one end of the second air hole is communicated with the air guide cavity, the other end of the second air hole is communicated with the outer space of the shell, a speed increasing table is arranged on the shell, the speed increasing table is communicated with the second air hole, and the speed of air flowing through the speed increasing table is greater than that of air flowing through one end, close to the outer side of the shell, of the first air hole.

In one possible implementation manner, the speed increasing table is in a shape of a circular truncated cone, a connecting hole is formed in the speed increasing table, the connecting hole penetrates through the speed increasing table along the axial direction of the speed increasing table, the connecting hole is communicated with the second air hole, the end face of the large-diameter end of the speed increasing table is connected with the valve body, and the shell provided with the scavenging valve is vertically arranged.

In one possible implementation, a filter assembly is disposed within the first air hole and the second air hole.

In one possible implementation, the filter assembly includes a first filter element capable of filtering dust in air and a second filter element capable of filtering water vapor in air, the first filter element and the second filter element being cylindrical, the first filter element and the second filter element being screwed into the first air hole and the second air hole.

The PTC electric heater provided by the utility model has the beneficial effects that: compared with the prior art, the utility model has the advantages that the replacement air valve is arranged on the shell, so that the metal pipe inside the heating assembly can be communicated with the space outside the shell through the air valve, the working performance of the heating assembly is effectively improved relative to the completely sealed environment in an aerobic environment, and meanwhile, the installation and the disassembly of the air valve on the shell are more convenient through the locking assembly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a PTC electric heater according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a part of a housing according to an embodiment of the present utility model;

FIG. 3 is a schematic view of an angle of a gas exchange valve according to an embodiment of the present utility model;

FIG. 4 is a schematic view of another angle of a gas exchange valve according to an embodiment of the present utility model;

fig. 5 is a schematic structural view of an unlocking lever according to an embodiment of the present utility model.

Wherein, each reference sign is as follows in the figure:

1. a housing; 2. a gas exchange valve; 3. a locking assembly;

101. a mounting hole; 102. a limit groove;

201. a valve body; 202. a first air hole; 203. a second air hole; 204. a speed increasing table; 205. a filter assembly;

301. a clamping plate; 302. a clamping block; 303. a fixing plate; 304. a return spring; 305. a chute; 306. a slide block; 307. unlocking the rope; 308. unlocking the rod; 309. unlocking the hole; 310. a small diameter rod; 311. a large diameter rod; 312. unlocking groove.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It should be further noted that the drawings and embodiments of the present utility model mainly describe the concept of the present utility model, and on the basis of the concept, some specific forms and arrangements of connection relations, position relations, power units, power supply systems, hydraulic systems, control systems, etc. may not be completely described, but those skilled in the art may implement the specific forms and arrangements described above in a well-known manner on the premise of understanding the concept of the present utility model.

When an element is referred to as being "fixed" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

The terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

The terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" means two or more, and the meaning of "a number" means one or more, unless specifically defined otherwise.

The PTC electric heater provided by the present utility model will now be described.

Referring to fig. 1, 2 and 3, the PTC electric heater includes a heating assembly, a housing, a ventilation valve 2 and a retracting assembly, wherein the heating assembly has a plurality of metal tubes; the inside of the shell 1 is provided with a containing cavity, the heating component is arranged in the containing cavity, an air guide cavity is arranged between the heating component and the shell 1, each metal pipe is communicated with the air guide cavity, and the shell 1 is provided with a mounting hole 101; the scavenging valve 2 is inserted into the mounting hole 101, and the air guide cavity is communicated with the external space of the shell 1 through the scavenging valve 2; the locking component 3 is arranged between the ventilation valve 2 and the shell 1, and when the locking component 3 is locked, the ventilation valve 2 and the shell 1 are relatively fixed; when the locking component 3 is unlocked, the air exchange valve 2 and the shell 1 are unlocked relatively.

The PTC electric heater provided by the embodiment has the beneficial effects that: compared with the prior art, the PTC electric heater provided by the embodiment is provided with the air exchange valve 2 on the shell 1, so that the metal pipe inside the heating assembly can be conducted with the space outside the shell 1 through the air exchange valve 2, the working performance of the heating assembly is effectively improved in an aerobic environment relative to a completely sealed environment, and meanwhile, the air exchange valve 2 is more convenient to install and detach on the shell 1 by arranging the locking assembly 3.

Based on the above design concept, the locking assembly 3 of the present utility model comprises the clamping plate 301 and the clamping block 302, wherein the clamping plate 301 is slidably arranged at one end of the gas exchange valve 2, the clamping block 302 is arranged at the other end of the gas exchange valve 2, and the clamping plate 301 can be partially arranged at the outer side of the side wall of the gas exchange valve 2 due to sliding or completely arranged at the inner side of the side wall of the gas exchange valve 2 due to sliding.

When the ventilation valve 2 is installed, the clamping plate 301 is abutted against the inner side wall of the shell 1 to prevent the ventilation valve 2 from sliding outwards; the clamping block 302 is abutted against the outer side wall of the shell 1, so that the gas exchange valve 2 is prevented from moving into the shell 1, and the gas exchange valve 2 is fixed relative to the shell 1.

As shown in fig. 3, one end of the ventilation valve 2 is provided with a plurality of fixing plates 303, the fixing plates 303 are provided with return springs 304, the clamping plates 301 are connected with the return springs 304, the end face of the ventilation valve 2 is provided with sliding grooves 305, the bottom surface of the clamping plates 301 is provided with sliding blocks 306, the sliding blocks 306 are inserted into the sliding grooves 305, and when the return springs 304 are in a natural state, part of the clamping plates 301 extend to the outer side of the side wall of the ventilation valve 2. During the insertion of the gas exchange valve 2, the clamping plate 301 is retracted, the return spring 304 is compressed at this time, and when the insertion is completed, the clamping plate 301 slides outwards under the action of the return spring 304 and is clamped inside the housing 1.

As a preferred scheme, the clamping plates 301 comprise two symmetrically arranged left and right, the PTC electric heater further comprises an unlocking assembly, the unlocking assembly comprises an unlocking rope 307, an unlocking hole 309 and an unlocking rod 308, the unlocking rope 307 is connected to one end of the two clamping plates 301 which are oppositely arranged, the unlocking hole 309 is formed in the gas exchange valve 2, the unlocking rod 308 is slidably arranged in the unlocking hole 309, the unlocking rod 307 can be pushed to move due to sliding, and the unlocking rope 307 can drive the clamping plates 301 to retract to the inner side of the side wall of the gas exchange valve 2.

The unlocking component is arranged, so that the locking component 3 is unlocked conveniently, and the valve body 201 is convenient to detach.

As shown in fig. 5, the unlocking hole 309 includes a large-diameter section and a small-diameter section, the large-diameter section being provided on a side close to the clamping plate 301; the unlocking rod 308 comprises a large-diameter rod 311 and a small-diameter rod 310, and the large-diameter rod 311 is inserted into the large-diameter section. The small diameter hole can prevent the unlocking rod 308 from being pulled out of the ventilation valve 2. The bottom of the unlocking lever 308 is provided with an unlocking groove 312, and the unlocking rope 307 is stuck in the unlocking groove 312. In addition, the housing 1 is provided with a limiting groove 102, and when the ventilation valve 2 is installed, the clamping block 302 is arranged in the limiting groove 102.

In this embodiment, the ventilation valve 2 includes a valve body 201 and two air holes, both of which are disposed on the valve body 201, and air outside the housing 1 can enter the air guiding cavity through one air hole thereof, and air in the air guiding cavity can be discharged outside the housing 1 through the other air hole.

By arranging the two air holes, the metal pipe and the air in the air guide cavity can be conveniently exchanged with the air outside the shell 1, so that the heating assembly can be conveniently kept in an aerobic working environment.

Preferably, the valve body 201 is cylindrical, the air hole comprises a first air hole 202 and a second air hole 203, the first air hole 202, the second air hole 203 and the valve body 201 are axially arranged in parallel, the first air hole 202 and the second air hole 203 are arranged at intervals, one end of the first air hole 202 is communicated with the air guide cavity, the other end of the first air hole 202 is communicated with the external space of the shell 1, one end of the second air hole 203 is communicated with the air guide cavity, the other end of the second air hole 203 is communicated with the external space of the shell 1, a speed increasing table 204 is arranged on the shell 1, and the speed increasing table 204 is communicated with the second air hole 203.

The speed increasing table 204 is arranged, so that the speed of air flowing through the speed increasing table 204 is higher than the speed of air flowing through one end, close to the outer side of the shell 1, of the first air hole 202, and according to aerodynamics, the air pressure at the speed increasing table 204 is lower than the air pressure at the first air hole 202, and then the air can enter the air guide cavity from the first air hole 202, and the air in the air guide cavity can flow out from the speed increasing table 204, so that the air at the inner side and the outer side of the shell 1 flows, and ventilation is facilitated.

As shown in fig. 4, the speed increasing table 204 is in a shape of a circular truncated cone, a connecting hole is formed in the speed increasing table 204, the connecting hole penetrates through the speed increasing table 204 along the axial direction of the speed increasing table 204, the connecting hole is communicated with the second air hole 203, the end face of the large-diameter end of the speed increasing table 204 is connected with the valve body 201, and the shell 1 provided with the scavenging valve 2 is vertically arranged.

It should be noted that, although the housing 1 is made of plastic material and has a certain heat insulation effect, the temperature of the housing is still higher than the ambient temperature, and after the air around the housing 1 absorbs the heat of the housing 1, convection is formed due to the rising of the air. Due to the arrangement of the truncated cone-shaped speed increasing table 204, the second air hole 203 is higher than the first air hole 202, so that the air pressure at the second air hole 203 is lower than the air pressure at the first air hole 202 when air flows through.

In addition, the first air hole 202 and the second air hole 203 are provided with a filter assembly 205, which prevents the filter assembly from being damaged by the first air hole 202 and the second air hole 203 entering the heating assembly.

Specifically, the filter assembly 205 includes a first filter member capable of filtering dust in the air and a second filter member capable of filtering water vapor in the air, the first filter member and the second filter member being cylindrical, the first filter member and the second filter member being screwed into the first air hole 202 and the second air hole 203.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. A PTC electric heater, comprising:

a heating assembly having a plurality of metal tubes;

the shell (1) is internally provided with a containing cavity, the heating assembly is arranged in the containing cavity, a gas guide cavity is arranged between the heating assembly and the shell (1), each metal pipe is communicated with the gas guide cavity, and the shell (1) is provided with a mounting hole (101);

the air exchange valve (2) is inserted into the mounting hole (101), and the air guide cavity is communicated with the external space of the shell (1) through the air exchange valve (2);

the locking assembly (3) is arranged between the air exchange valve (2) and the shell (1), and when the locking assembly (3) is locked, the air exchange valve (2) and the shell (1) are relatively fixed; when the locking component (3) is unlocked, the air exchange valve (2) and the shell (1) are unlocked relatively.

2. A PTC electric heater according to claim 1, wherein: the locking assembly (3) comprises a clamping plate (301) and a clamping block (302), wherein the clamping plate (301) is arranged at one end of the air exchange valve (2) in a sliding mode, the clamping block (302) is arranged at the other end of the air exchange valve (2), and the clamping plate (301) can be arranged on the outer side of the side wall of the air exchange valve (2) locally due to sliding or is arranged on the inner side of the side wall of the air exchange valve (2) completely due to sliding.

3. A PTC electric heater according to claim 2, wherein: one end of the air exchange valve (2) is provided with a plurality of fixed plates (303), a reset spring (304) is arranged on the fixed plates (303), the clamping plate (301) is connected with the reset spring (304), a sliding groove (305) is arranged on the end face of the air exchange valve (2), a sliding block (306) is arranged on the bottom face of the clamping plate (301), the sliding block (306) is inserted into the sliding groove (305), and when the reset spring (304) is in a natural state, part of the clamping plate (301) extends to the outer side of the side wall of the air exchange valve (2).

4. A PTC electric heater according to claim 3, wherein: the PTC electric heater comprises clamping plates (301) and is characterized by comprising two laterally symmetrically arranged PTC electric heaters, wherein the PTC electric heater further comprises an unlocking assembly, the unlocking assembly comprises unlocking ropes (307), unlocking holes (309) and unlocking rods (308), the unlocking ropes (307) are connected to two opposite arranged ends of the clamping plates (301), the unlocking holes (309) are formed in the ventilation valves (2), the unlocking rods (308) are slidably arranged in the unlocking holes (309), the unlocking rods can push the unlocking ropes (307) to move due to sliding, and the unlocking ropes (307) can drive the clamping plates (301) to retract to the inner sides of the side walls of the ventilation valves (2).

5. A PTC electric heater according to claim 4, wherein: the unlocking hole (309) comprises a large-diameter section and a small-diameter section, and the large-diameter section is arranged on one side close to the clamping plate (301); the unlocking rod (308) comprises a large-diameter rod (311) and a small-diameter rod (310), and the large-diameter rod (311) is inserted into the large-diameter section.

6. A PTC electric heater according to claim 1, wherein: the air exchange valve (2) comprises a valve body (201) and two air holes, wherein the two air holes are formed in the valve body (201), air outside the shell (1) can enter the air guide cavity through one of the air holes, and air in the air guide cavity can be discharged out of the shell (1) through the other air hole.

7. A PTC electric heater according to claim 6, wherein: the valve body (201) is cylindric, the gas pocket includes first gas pocket (202) and second gas pocket (203), first gas pocket (202) second gas pocket (203) with the axial parallel arrangement of valve body (201), first gas pocket (202) with second gas pocket (203) interval arrangement, the one end of first gas pocket (202) with the air guide chamber intercommunication, the other end of first gas pocket (202) with the outside space of casing (1) switches on, the one end of second gas pocket (203) with the air guide chamber switches on, the other end of second gas pocket (203) with the outside space of casing (1) switches on, be equipped with acceleration rate platform (204) on casing (1), acceleration rate platform (204) with second gas pocket (203) switch on, the air flow through acceleration rate platform (204) velocity of one end that is close to casing (1) outside of the air guide chamber (202) is greater than the velocity of air flow through.

8. A PTC electric heater according to claim 7, wherein: the speed increasing table (204) is in a round table shape, a connecting hole is formed in the speed increasing table (204), the connecting hole penetrates through the speed increasing table (204) along the axial direction of the speed increasing table (204), the connecting hole is communicated with the second air hole (203), the end face of the large-diameter end of the speed increasing table (204) is connected with the valve body (201), and the shell (1) of the air exchanging valve (2) is vertically arranged.

9. A PTC electric heater according to claim 8, wherein: a filter assembly (205) is arranged in the first air hole (202) and the second air hole (203).

10. A PTC electric heater according to claim 9, wherein: the filter assembly (205) comprises a first filter element and a second filter element, wherein the first filter element can filter dust in air, the second filter element can filter water vapor in air, the first filter element and the second filter element are cylindrical, and the first filter element and the second filter element are in threaded connection with the first air hole (202) and the second air hole (203).