PTC (Positive Temperature Coefficient) heater comprising heating bag shell insert
By separating the plastic base from the heating cavity of the aluminum metal, the design solves the problems of heavy weight, complex processing, serious heat loss and low safety performance of existing PTC water heaters, and achieves efficient heat conduction and cost reduction.
Patent Information
- Application Number
- CN202423129510.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-18
AI Technical Summary
The existing PTC water heater base and heat exchange shell of the heating element are integrally die-cast, which leads to problems such as heavy weight, complex processing, serious heat loss, high cost, low safety performance, and wall thickness affecting heat exchange efficiency.
By separating the plastic base from the heating cavity of the aluminum metal, the heating pack is inserted into the heating cavity of the metal. The plastic base and the aluminum metal are interlocked to achieve efficient heat conduction, simplifying the process and reducing costs.
It improves insulation and safety performance, reduces overall weight, lowers costs, increases heat transfer efficiency, and simplifies mold development and processing.
Smart Images
Figure CN223600045U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to new energy PTC heating device technical field, concretely relates to a kind of PTC heater containing heating package shell insert. BACKGROUND
[0002] The heat exchange shell of the common PTC water heater base and heating package on the market is integrally pressure cast, and then the heating package is pressed tightly by using inclined contract to make the heat exchange shell of the heating package and the liquid medium produce heat exchange to realize the function of the product. The existing molding method has the following disadvantages:
[0003] (1) The base and the heat exchange shell of the heating package are integrally pressure cast. Generally, cast aluminum pressure casting is used to improve the heat exchange efficiency, and the product quality is heavy.
[0004] (2) The base and the heat exchange shell of the heating package are integrally pressure cast. The processing technology is complex, and the mold opening precision and processing are difficult.
[0005] (3) The overall metal material has a high thermal conductivity, and heat exchange between heat and air causes heat loss, thereby reducing the heat transfer efficiency.
[0006] (4) The cost of the pressure casting mold and the cast aluminum material is high due to the use of metal, and the cost advantage is not great.
[0007] (5) Due to the metal conductivity, the PTC water heater is generally a high-voltage product, which can easily cause insulation failure, high-voltage discharge, and low safety performance.
[0008] (6) The base and the heat exchange shell of the heating package are integrally pressure cast. The performance points of the metal pressure casting determine that the wall thickness of the base and the heat exchange shell of the heating package is uniform and the wall thickness is greater than or equal to 3 mm. Otherwise, it will cause cold separation, leakage and other defects, and the heat exchange efficiency is greatly affected by the metal wall thickness. INVENTION CONTENTS
[0009] The technical problem solved by the present application is that the base and the heat exchange shell of the heating package are integrally pressure cast in the prior art, the heat exchange efficiency is low, the heat loss is serious, the overall quality is heavy, the metal high-voltage conductivity safety performance is low, the wall thickness of the heat exchange shell of the heating package is large, the heat exchange efficiency is low, and the cold separation and other problems such as poor sealing are prone to occur. The utility model provides a PTC heater containing a heating package shell insert. The plastic base and the metal aluminum heating cavity are separated, the metal aluminum heating cavity is independently embedded with the plastic base, the heating package is still inserted into the original heating cavity, thereby realizing efficient heat conduction, simple processing, low cost and easy popularization.
[0010] Technical scheme: A PTC heater containing a heating package shell insert, comprising a heating package shell insert and a shell,
[0011] The heating pack housing insert includes a base and a heating pack housing.
[0012] The base is a plastic base used for support and heat exchange. The base includes a bottom support and a heat exchange shell. The heat exchange shell is set on the bottom support and is a frame with an "I" shaped cross-section. It includes a main body, a first partition and several sets of two parallel left-right symmetrical heating pack shell interfaces. The first partition is vertically set at the center of the back of the main body. Its top is connected to the inner side of the top of the main body and its bottom is not in contact with the inner side of the bottom of the main body. Several sets of two parallel left-right symmetrical heating pack shell interfaces are evenly opened in the frame of the main body. The two opposite heating pack interfaces are symmetrically distributed with the first partition as the axis. The two adjacent sets of heating pack shell interfaces are arranged alternately.
[0013] The heating pack housing is a metal heating cavity with an opening on one side corresponding to several heating pack housing interfaces, used to install the heating pack, and the heating pack housing is embedded in the heating pack housing interface;
[0014] The outer side of the heating pack shell, the inner side of the heat exchange shell, and the first partition plate form a flow channel with bottom communication;
[0015] The outer shell is a plastic shell located on the back of the heat exchange shell. The heat exchange medium in the PTC heater is water. The outer shell includes an outer shell, a water inlet, a water outlet, several sets of water-blocking components, and a second partition. The water inlet and water outlet are respectively located on the top two sides of the outer shell. The second partition is located at the center of the inner side of the outer shell, corresponding to the position of the first partition. The number of several sets of water-blocking components corresponds to the number of heating pack shells and is located above the tail of the heating pack shell for blocking water. The outer shell and the heat exchange shell form a closed space with water channels inside.
[0016] As a preferred embodiment, the upper and lower adjacent sets of heating pack shell interfaces are arranged in an alternating manner, specifically: the two heating pack shell interfaces of one set are close to the inner wall of the main body, and the two heating pack shell interfaces of the other set are close to the first partition, so that the heat exchange medium forms a "Z"-shaped baffle.
[0017] Preferably, the top surface of the heating pack shell forms an angle of 1.5-3° with the horizontal plane, the bottom surface of the heating pack shell is horizontal, and the corners of the heating pack shell are provided with chamfered structures to facilitate the flow of the medium.
[0018] Preferably, there is a gap of at least 0.1 mm between the heating pack shell and the interior of the heat exchange shell, the first partition, the second partition, and the interior of the outer shell.
[0019] Preferably, the bottom support has two through holes and a grounding mounting hole on one side for connecting high-voltage connectors and low-voltage connectors, respectively, and a positioning hole on the other side for positioning production tooling.
[0020] Preferably, the heat generating package shell is a stamped piece of aluminum material with a wall thickness of no more than 1.5 mm.
[0021] Preferably, the heat generating package shell insert and the outer shell are connected by gluing and / or bolting to achieve sealing.
[0022] Preferably, when the heat generating package shell insert and the outer shell are connected by bolting, the heat exchange shell side wall is provided with a first threaded hole, and the outer shell side wall is provided with a second threaded hole, and the first threaded hole and the second threaded hole are connected by a bolt.
[0023] Preferably, the PTC heater outer shell further comprises a sealing ring arranged at the connection between the heat generating package shell insert and the outer shell.
[0024] Preferably, the PTC heater outer shell further comprises a cover plate I arranged at the front side of the heat exchange shell and a cover plate II arranged at the bottom of the bottom support.
[0025] The utility model provides a kind of PTC heater containing heat generating package shell insert, and its main components are composed of plastic base and metal heat generating package shell, and heat generating package is inserted into the heat hole of metal heat generating package shell, and heat generating package realizes heat conduction by metal heat generating package shell, the utility model uses the form that plastic base and metal aluminum material heat hole are separated, so that metal aluminum material heat hole is independently embedded with plastic base, and heat generating package is still inserted into original heat hole, to realize high-efficiency heat conduction. Heat hole shell metal aluminum material is manufactured by pre-stamping, and the wall thickness is small (≤1.5 mm), and it is simple to form, then it is injection molded with plastic base, while ensuring sealing performance, the weight and cost of original metal base can be reduced.
[0026] Advantages:
[0027] 1. The utility model uses plastic base and metal heat hole to be embedded, improves insulation performance, improves high-voltage safety performance of application end, and the development cost of mold is reduced by the embedding mode of the two, and the development cost is higher in prior art by using metal mold;
[0028] 2. The utility model uses plastic base, which is lower in density and higher in flame retardant performance than metal base, reduces the total amount of the whole machine of application end, and reduces energy output;
[0029] 3. In the utility model, heat generating package shell is formed by stamping aluminum material, and the wall thickness is small (≤1.5 mm), and it is simple to manufacture and low in cost;
[0030] 4. On the function, the wall thickness of metal base in prior art is about 3 mm by die casting, and the heat conduction efficiency of the embedded metal wall thickness in the utility model is higher.
[0031] 5. The cost of the metal base in the prior art is high, and the processing is difficult, the plastic base and the aluminum heating hole of the new type are mutually embedded, the processing is simple, the cost is low, and popularization is easy to realize. BRIEF DESCRIPTION OF DRAWINGS
[0032] Figure 1 The exploded view of the PTC heater containing the heating package shell insert is described in the new type.
[0033] Figure 2 The structure diagram of the heating package shell insert, wherein (a) is a three-dimensional Figure One , (b) is a three-dimensional Figure Two , (c) is a three-dimensional Figure Three , (d) is the exploded view of the base and the heating package shell.
[0034] Figure 3 The three-dimensional structure diagram of the PTC heater containing the heating package shell insert is described in the new type.
[0035] Figure 4 The internal structure diagram of the three-dimensional structure diagram in Figure 3 .
[0036] Figure 5 The use state diagram of the PTC heater containing the heating package shell insert is described in the new type.
[0037] In the figure, each number mark represents the following: 1. Base; 1-1. Support; 1-2. Heat exchange shell; 1-2-1. First threaded hole; 1-2-2. First partition; 1-2-3. Heating package shell interface; 2. Heating package shell; 3. Shell; 3-1. Water inlet; 3-2. Water outlet; 3-3. Water blocking piece; 3-4. Second partition; 3-5. Second threaded hole; 4. Sealing ring; 5. Cover plate I; 6. Cover plate II; 7. Heating package. DETAILED DESCRIPTION
[0038] The new type will be further described below in combination with the drawings and specific embodiments.
[0039] Embodiment 1
[0040] A PTC heater containing a heating package shell insert, referring to Figures 1-5 , the heating package shell insert and the shell 3.
[0041] Among them, the heating package shell insert includes a base 1 and a heating package shell 2.
[0042] The base 1 is a plastic base used for support and heat exchange. The base 1 includes a bottom support 1-1 and a heat exchange shell 1-2. The heat exchange shell 1-2 is located on the bottom support 1-1. The heat exchange shell 1-2 is a frame with an "I" shaped cross-section, including a body, a first partition 1-2-2, and several sets of two parallel, left-right symmetrical heating pack shell interfaces 1-2-3 (6 sets in this embodiment, with the heating pack shell interfaces 1-2-3 having rectangular openings). The first partition 1-2-2 is vertically located at the center of the back of the body, with its top connected to the inner side of the top of the body and its bottom not contacting the inner side of the bottom of the body. Several sets of two parallel, left-right symmetrical heating pack shell interfaces 1-2-3 are evenly opened within the body frame. The two opposite heating pack interfaces are symmetrically distributed about the first partition 1-2-2, and the two adjacent sets of heating pack shell interfaces 1-2-3 are staggered.
[0043] The heating pack housing 2 is a metal heating cavity with an opening on one side corresponding to several heating pack housing interfaces 1-2-3 (the size corresponds to the heating pack 7), used to install the heating pack 7. The heating pack housing 2 is embedded in the heating pack housing interface 1-2-3.
[0044] The outer side of the heating pack shell 2, the inner side of the heat exchange shell 1-2, and the first partition 1-2-2 form a bottom-connected flow channel.
[0045] The outer shell 3 is a plastic shell located on the back of the heat exchange shell 1-2. The heat exchange medium in the PTC heater is water. The outer shell 3 includes an outer shell, an inlet 3-1, an outlet 3-2, several sets of water-blocking components 3-3, and a second partition 3-4. The inlet 3-1 and the outlet 3-2 are respectively located on the top two sides of the outer shell. The second partition 3-4 is located at the center of the inner side of the outer shell, corresponding to the position of the first partition 1-2-2. The number of several sets of water-blocking components 3-3 corresponds to the number of heating pack shells 2, and is located above the tail of the heating pack shell 2 for blocking water. The outer shell 3 and the heat exchange shell 1-2 form a closed space with water channels inside.
[0046] The above-mentioned heating pack housing insert is prepared as follows: First, the outer shell shape of the base 1 is designed according to the requirements of the injection mold. Then, a metal aluminum heating pack housing 2 with a wall thickness of 1.5mm is pre-stamped. The heating pack housing 2 is placed in the injection mold, and liquid injection material is poured in by the injection molding machine to cool and solidify. The one-piece injection molding method can ensure the sealing of the heating pack housing insert.
[0047] When using the PTC heater containing the heating element housing insert, see [link to relevant documentation]. Figure 5Twelve heating bags 7 are inserted into the corresponding heating bag shells 2 respectively, and the inlet and outlet water pipes of the application end are connected to the water inlet 3-1 and water outlet 3-2 of the shell 3 respectively. The cooling liquid circulates through the water path, and the heat generated by the heating bag 7 is transmitted to the heating bag shell 2. The cooling liquid carries away the heat of the heating bag shell 2, so that the cold water becomes hot water suitable for use.
[0048] Example 2
[0049] The same as example 1, the difference is that the interfaces 1-2-3 of the upper and lower adjacent two groups of heating bag shells are staggered, specifically: the two heating bag shell interfaces 1-2-3 of one group are close to the inner wall of the body (the gap on one side close to the inner wall of the body is 0.1mm, and the gap on the other side with the first partition plate 1-2-2 is 10mm), and the two heating bag shell interfaces 1-2-3 of the other group are close to the first partition plate 1-2-2 (the gap on one side close to the first partition plate 1-2-2 is 0.1mm, and the gap on the other side with the inner wall of the body is 10mm), so that the heat exchange medium forms a "Z" shape. The tail of the heating bag shell 2 and the inside of the shell 3 have a gap of 1-2mm (1.5mm in this example).
[0050] The top surface of the heating bag shell 2 forms an angle of 1.5-3° with the horizontal plane (3° in this example), and the bottom surface of the heating bag shell 2 is horizontal, so as to clamp the heating bag 7. The corner of the heating bag shell 2 is provided with a chamfer structure to facilitate the drainage of the medium.
[0051] One side of the bottom support 1-1 is provided with two through holes and a grounding mounting hole, and the other side is provided with a positioning hole for positioning the production tool.
[0052] The heating bag shell insert and the shell 3 are connected by glue and / or bolts to realize sealing.
[0053] In this example, bolt connection is adopted, the side wall of the heat exchange shell 1-2 is provided with a first threaded hole 1-2-1, and the side wall of the shell 3 is provided with a second threaded hole 3-5, and the first threaded hole 1-2-1 and the second threaded hole 3-5 are connected by bolts.
[0054] At the same time, the PTC heater shell also includes a sealing ring 4, which is arranged at the connection between the heating bag shell insert and the shell 3, and is used for sealing.
[0055] In addition, the PTC heater shell also includes a cover plate I 5 and a cover plate II 6, the cover plate I 5 is arranged on the front side of the heat exchange shell 1-2, and the cover plate II 6 is arranged on the bottom of the bottom support 1-1, which is used for sealing and shielding the non-electric part of the PTC heater shell.
[0056] It should be finally pointed out that: the above implementation manners are only used for illustrating the technical schemes of the utility model, and not for limiting them; although the utility model has been explained in detail with reference to the foregoing implementation manners, those skilled in the art should understand that: the technical schemes recorded in the foregoing implementation manners can still be modified by them, or some or all of the technical features therein can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical schemes deviate from the scope of the technical schemes of the utility model implementation manners.
Claims
1. A PTC heater comprising a heat-generating package housing insert, characterized by, Including the heating pack housing insert and the outer shell (3), The heating pack housing insert includes a base (1) and a heating pack housing (2). The base (1) is a plastic base used for support and heat exchange. The base (1) includes a bottom support (1-1) and a heat exchange housing (1-2). The heat exchange housing (1-2) is mounted on the bottom support (1-1). The heat exchange housing (1-2) is an I-shaped frame, including a main body, a first partition (1-2-2), and several sets of two parallel, symmetrical heating pack housing interfaces (1-2-3). The first partition (1-2-2) is vertically positioned at the center of the back of the main body, with its top connected to the inner side of the top of the main body and its bottom not in contact with the inner side of the bottom of the main body. Several sets of parallel, left-right symmetrical heating pack shell interfaces (1-2-3) are evenly opened within the main body frame. The two opposite heating pack interfaces are symmetrically distributed with the first partition (1-2-2) as the axis. The two sets of heating pack shell interfaces (1-2-3) are arranged alternately. The heating pack shell (2) is a metal heating cavity with an opening on one side corresponding to several heating pack shell interfaces (1-2-3), used to install the heating pack (7). The heating pack shell (2) is embedded in the heating pack shell interface (1-2-3). The outer side of the heating pack shell (2) forms a bottom-connected flow channel with the inner side of the heat exchange shell (1-2) and the first partition (1-2-2). The outer shell (3) is a plastic shell and is located on the back of the heat exchange shell (1-2). The heat exchange medium in the PTC heater is water. The outer shell (3) includes an outer shell, an inlet (3-1), an outlet (3-2), several sets of water-blocking components (3-3), and a second partition (3-4). The inlet (3-1) and outlet (3-2) are respectively located on the top two sides of the outer shell. The second partition (3-4) is located at the center of the inner side of the outer shell and corresponds to the position of the first partition (1-2-2). The number of several sets of water-blocking components (3-3) corresponds to the number of heating pack shells (2) and is located above the tail of the heating pack shell (2) for blocking water. The outer shell (3) and the heat exchange shell (1-2) form a closed space with water channels inside.
2. A PTC heater comprising a heat-generating package insert according to claim 1, characterized in that, The two adjacent sets of heating pack shell interfaces (1-2-3) are arranged in an alternating manner as follows: the two heating pack shell interfaces (1-2-3) of one set are close to the inner wall of the main body, and the two heating pack shell interfaces (1-2-3) of the other set are close to the first partition (1-2-2), so that the heat exchange medium forms a "Z" shaped flow.
3. The PTC heater comprising a heat-generating package insert according to claim 1, characterized in that, The top surface of the heating pack housing (2) forms an angle of 1.5-3° with the horizontal plane, the bottom surface of the heating pack housing (2) is horizontal, and the corner of the heating pack housing (2) is provided with a chamfer structure to facilitate the flow of medium.
4. The PTC heater comprising a heat-generating package insert according to claim 1, characterized in that, There is a gap of at least 0.1 mm between the heating pack shell (2) and the interior of the heat exchange shell (1-2), the first partition (1-2-2), the second partition (3-4) and the outer shell (3).
5. The PTC heater comprising a heat-generating package insert according to claim 1, characterized in that, The bottom support (1-1) has two through holes and a grounding mounting hole on one side. The two through holes are used to connect the high-voltage connector and the low-voltage connector, respectively. The other side has a positioning hole for positioning the production tooling.
6. The PTC heater comprising a heat-generating package insert according to claim 1, characterized in that, The heat package shell (2) is a stamped metal aluminum material with a wall thickness of no more than 1.5 mm.
7. The PTC heater comprising a heat-generating package insert according to claim 1, characterized in that, The heat package shell insert and the outer shell (3) are connected by gluing and / or bolting to achieve sealing.
8. A PTC heater comprising a heat-generating package insert according to claim 7, characterized in that, When the heat package shell insert and the outer shell (3) are connected by bolting, the side wall of the heat exchange shell (1-2) is provided with a first threaded hole (1-2-1), and the side wall of the outer shell (3) is provided with a second threaded hole (3-5), and the first threaded hole (1-2-1) and the second threaded hole (3-5) are connected by bolting.
9. The PTC heater comprising a heat-generating package insert according to claim 1, characterized in that, The PTC heater outer shell further comprises a sealing ring (4) arranged at the connection between the heat package shell insert and the outer shell (3).
10. The PTC heater comprising a heat-generating package insert according to claim 1, characterized in that, The PTC heater outer shell further comprises a cover plate I (5) and a cover plate II (6), the cover plate I (5) is arranged at the front side of the heat exchange shell (1-2), and the cover plate II (6) is arranged at the bottom of the bottom support (1-1).