Combination pipe-shaped electric heating device
The combination pie-shaped electric heating device with active and passive units addresses cost and heat duration issues by stacking units with magnetic attraction, enhancing efficiency and safety through thermal storage and uniform heat distribution.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2026-02-02
- Publication Date
- 2026-03-31
AI Technical Summary
Conventional pie-shaped electric heating devices face challenges in cost efficiency due to their single-unit design, limited heat capacity, and short heat supply duration, especially when multiple units are used simultaneously.
A combination pie-shaped electric heating device with odd-numbered units, comprising active and passive units, where active units have integrated circuits and passive units store heat in high-capacity materials, allowing for compact stacking and extended heat supply through thermal conduction.
Reduces manufacturing costs and potential failure points, extends heat supply duration, and ensures uniform heat distribution by alternating active and passive units, improving user experience and safety.
Smart Images
Figure 0003255316000001_ABST
Abstract
Description
Technical Field
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[0001] The present invention relates to the technical field of medical and healthcare devices, and particularly to a combined pie-shaped electric heating device.
Background Art
[0002] As a common personal body warmer and physical therapy healthcare device, the pie-shaped electric heating device is widely used in daily home warming, local hot compress for muscle pain relief, and the "warm ironing" therapy in traditional Chinese medicine health preservation practices due to its excellent portability and the characteristics of gentle and continuous heat supply. Its basic operating principle generally depends on an internal electric heating element (e.g., resistance wire or PTC heating element) to convert electrical energy into thermal energy and transfer the heat to the surface of the human body through the outer shell, so as to achieve the purpose of promoting blood circulation and relieving fatigue and discomfort.
[0003] Although the products of conventional pie-shaped electric heating devices have almost mature functions when used alone, when facing diversified and sophisticated usage scenarios, there are gradually certain limitations in their inherent single-unit design model. First, in order to realize the instant heating function, each pie-shaped electric heating device needs to be equipped with a complete heating circuit, a control module, and an independent power interface, which makes it difficult to further reduce the manufacturing cost of the product. In the scenario where multiple units are used simultaneously (e.g., when it is necessary to warm large-area regions such as the waist and back), the purchase cost of users increases significantly. Second, a single pie-shaped electric heating device has limited heat capacity, and after the power is turned off, the heat is rapidly lost, so the continuous heat supply time is limited, and it is difficult to meet the health preservation needs of continuous heat therapy over a long period of time.
[0004] Therefore, it is necessary to provide a combined pie-shaped electric heating device to solve the above technical problems.
Summary of the Invention
Problems to be Solved by the Invention
[0005] The present invention aims to provide a combination type pie-shaped electronic heating device for solving the problems mentioned in the background art described above. [Means for solving the problem]
[0006] To achieve the above objectives, the means of the present invention for solving the above technical problems are as follows: A combination pie-shaped electric heating device, wherein the number of combination pie-shaped electric heating units is an odd number greater than 3, some of which are active pie-shaped electric heating units and some are passive pie-shaped electric heating units, and the pie-shaped electric heating unit includes a top cover, a bottom case and magnetic steel, the magnetic steel being used for adsorption and positioning when stacking multiple pie-shaped electric heating units. The aforementioned top cover is detachably or permanently connected to the bottom case, and together they form the outer shell of the pie-shaped electric heating unit. The aforementioned active pie-shaped electric heating unit is connected to an external power supply, and a PCB board is provided inside the outer shell, on which an electronic control circuit and resistors as heating elements are integrated. The outer shell of the passive, pie-shaped electric heating unit is filled only with a high-heat-capacity packing material for storing and gradually releasing heat.
[0007] As a further solution to the present invention, the active pie-shaped electric heating unit and the passive pie-shaped electric heating unit are arranged in alternating stacks.
[0008] As a further solution to the present invention, the electronic control circuit integrated on the PCB substrate of the active pie-shaped electric heating unit includes a temperature control module for monitoring and controlling the heating temperature of the resistive element.
[0009] As a further solution to this invention, the number of magnetic steels is at least two, and each is symmetrically arranged inside the outer shell, near the edge.
[0010] As a further solution to the present invention, the top lid and bottom case are manufactured from a material with good thermal conductivity.
[0011] As a further solution to the present invention, the PCB substrate is attached in a suspended state within the outer shell of an active piping electric heating unit via support ribs. [Effects of the Invention]
[0012] Compared to conventional technology, the beneficial effects of this invention are as follows:
[0013] In this invention, the total number of pie-shaped electric heating units is divided into two types with different functions, and by using the built-in magnetic steel to attract and stack them with each other, a compact overall structure is formed. Active pie-shaped electric heating units receive power from an external power source (e.g., a V / V adapter) to their internal PCB boards, and when current flows through the resistive elements on the PCB boards, they generate Joule heat, directly heating the outer shell of the unit. Passive pie-shaped electric heating units themselves have no circuitry, so their initial heating depends on physical contact with adjacent active pie-shaped electric heating units. The heat generated by the active units is absorbed by heat conduction and stored in the high heat capacity filler material inside, forming an "active + passive" combination mode. Assuming the same number of heat source functions are achieved, the overall manufacturing cost and potential circuit failure points of the system are significantly reduced. Next, the high heat capacity filler in the passive pie-shaped electric heating unit acts as a "thermal cell," absorbing and storing excess heat from the active unit and gradually releasing it after the power is turned off. This effectively extends the effective heat supply duration of the entire device and improves the continuity of the user experience. When stacking and combining the units, the active and passive units can be distributed alternately or symmetrically, which helps ensure uniform heat transfer within the combined device and avoids problems of localized overheating or underheating. [Brief explanation of the drawing]
[0014] The present invention will be further described below with reference to the drawings and embodiments. [Figure 1] This is a schematic diagram of the overall assembled state of the present invention. [Figure 2]This is a schematic diagram of the structure of the active pie-shaped electric heating unit of the present invention. [Figure 3] This is a schematic diagram of the disassembled structure of the active pipe-shaped electric heating unit of the present invention. [Figure 4] This is a schematic diagram of the internal structure of the passive pipe-shaped electric heating unit of the present invention. [Modes for carrying out the invention]
[0015] The present invention will be further described below with reference to the following embodiments.
[0016] Referring to Figures 1-4, the present invention provides a combination pie-shaped electric heating device, the number of combination pie-shaped electric heating units being an odd number greater than 3, some of which are active pie-shaped electric heating units 6, and others are passive pie-shaped electric heating units 7, the pie-shaped electric heating unit includes an upper lid 1, a bottom case 2, and magnetic steel 3, the magnetic steel 3 is used for adsorption and positioning when stacking multiple pie-shaped electric heating units, the upper lid 1 and bottom case 2 are detachably or fixedly connected and together the pie-shaped electric heating units The knitted outer shell consists of active pie-shaped electric heating units 6, which are connected to an external power source, and a PCB substrate 4 is provided inside the outer shell, integrating an electronic control circuit and resistive elements as heating elements. The outer shell of the passive pie-shaped electric heating units 7 is filled only with a high heat capacity filler material 5 for storing and gradually releasing heat. The number of active pie-shaped electric heating units 6 is (n / 2 + 0.5), and the number of passive pie-shaped electric heating units is (n / 2 - 0.5), where n is the total number of pie-shaped electric heating units and 3 In this invention, the pie-shaped electric heating units, which are odd in number, are divided into two types with different functions and are attached to and stacked with the built-in magnetic steel 3 to form a compact whole. The active pie-shaped electric heating unit 6 receives power from an external power source (e.g., a 220V / 12V adapter) to its internal PCB board 4, and when the resistive elements on the PCB board 4 are energized, they generate Joule heat, directly heating the outer shell of the unit. The passive pie-shaped electric heating unit 7 itself has no circuit, therefore The initial heating relies on physical contact with adjacent active pie-shaped electric heating units 6. The active units absorb the heat generated by the heating units through thermal conduction and store it in the high-heat-capacity packing material 5 inside. The high-heat-capacity packing material 5 is a phase-change heat storage material or a solid medium with high specific heat capacity, forming an "active + passive" combination mode. Only some units need to be configured with circuits and power interfaces, and assuming the same number of heat source functions are achieved, the overall manufacturing cost and potential circuit failure points of the system are significantly reduced, and operation is made easier.Next, the high heat capacity filler 5 within the passive pie-shaped electric heating unit 7 absorbs and stores excess heat from the active unit and gradually releases it after the power is turned off, thereby effectively extending the effective heat supply duration of the entire device and improving the continuity of the user experience. When stacked and combined, the active and passive units can be distributed alternately or symmetrically, which helps in uniform heat transfer within the combined device and avoids problems of localized overheating or underheating.
[0017] Furthermore, as shown in Figure 1, to explain in more detail, the active pie-shaped electric heating unit 6 and the passive pie-shaped electric heating unit 7 are arranged alternately in stacks, ensuring that there is one active pie-shaped electric heating unit 6 that acts as a "heat source core" capable of independently activating and providing initial heat conduction to the passive pie-shaped electric heating unit 7 in contact with it. This not only provides a sufficient and controllable active heat source, but also maximizes the efficiency of the passive heat storage member, achieving an optimal balance between the overall manufacturing cost and heating efficiency of the device.
[0018] To explain in more detail, the electronic control circuit integrated on the PCB board 4 of the active pie-shaped electric heating unit includes a temperature control module for monitoring and controlling the heating temperature of the resistive element, and the temperature control module generally includes temperature sensors such as NTC thermistors and logic control chips. The sensors monitor the temperature of the PCB board or its vicinity in real time and feed the signal back to the control chip, which compares the measured temperature with a preset safety temperature or a user-set temperature and controls a switching element such as a relay, thyristor, or MOSFET to turn the current to the resistive element on / off or adjust it, thereby achieving constant temperature control or overheating prevention. Precise temperature control effectively prevents the temperature of the pie-shaped electric heating device from spiraling out of control due to prolonged power supply or malfunction, thereby effectively avoiding burns to the user, fires, or damage to internal elements. This is an essential protective measure for protective healthcare products that are worn on the body or used at close range. Based on user experience, constant temperature control provides a stable heat output, avoiding discomfort caused by sudden temperature fluctuations, and allowing users to enjoy a continuous, gentle, and comfortable heating effect.
[0019] Furthermore, as shown in Figure 3, it should be specifically explained that there are at least two magnetic steels 3, each symmetrically positioned near the edge inside the outer shell. When it is necessary to stack and combine two or more pie-shaped electric heating devices, the magnetic steels 3 symmetrically positioned within the outer shell of each pie-shaped electric heating unit align with each other, generating a large magnetic attraction force. This symmetrical arrangement ensures a uniform distribution of the attraction force on a plane, allowing the stacked pie-shaped electric heating units to adhere tightly and flatly to each other, minimizing misalignment and slippage, and enabling quick and stable mechanical assembly. Users can neatly stack multiple pie-shaped electric heating devices without using any fasteners or tools, greatly improving ease of use and reliability of assembly. Additionally, the tight adhesion significantly reduces the air gap between the contact surfaces of the two pie-shaped electric heating devices, and since air is a poor conductor of heat, the heat transfer efficiency is significantly improved.
[0020] Furthermore, as shown in FIG. 3, specifically, the PCB board 4 is mounted in a suspended state via support ribs inside the outer shell of the active pie-shaped electric heating unit 6, and then sealed and fixed by filling with epoxy resin.
[0021] To summarize, the present invention divides the pie-shaped electric heating devices with an odd total number into two types with different functions, and forms a compact whole by adsorbing and laminating them with each other using the built-in magnetic steel 3, forming a "active + passive" combination mode. It is only necessary to configure the circuit and power interface for some units. On the premise of realizing the same number of heat source functions, the overall manufacturing cost and potential circuit failure points of the system are significantly reduced, and the operation is made easier. Next, the high heat capacity filling material 5 in the passive pie-shaped electric heating unit 7 can absorb and store the extra heat from the active unit as a "thermal battery" and gradually dissipate heat after the power is turned off. Therefore, the effective heat supply duration of the entire device is effectively extended, the continuity of the use experience is improved, and when stacked and combined, the active units and passive units can be distributed alternately or symmetrically, which helps to achieve uniform heat transfer in the heat combination body and avoid problems such as local overheating or insufficient heating. Also, in one pie-shaped electric heating device, the upper and lower two surfaces are the main heat dissipation areas, so there are 2n heat dissipation areas for n pie-shaped electric heating devices. Currently, in such a stacked energized structure in a cylindrical shape, there are always only two heat dissipation surfaces, so the heat dissipation area is significantly reduced. Taking n = 5 as an example, the heat dissipation area decreases from 10 to 2, and the reduction width reaches 80%, which clearly has an energy-saving effect and shortens the heating time to the preset temperature.
Explanation of Reference Numerals
[0022] 1... Upper cover 2... Bottom case 3... Magnetic steel 4... PCB board 5... High heat capacity filling material 6... Active pie-shaped electric heating unit 7... Passive pie-shaped electric heating unit
Claims
1. The number is an odd number greater than 3, some of which are active pie-shaped electric heating units (6), and some of which are passive pie-shaped electric heating units (7). Each pie-shaped electric heating unit includes a top cover (1), a bottom case (2), and magnetic steel (3), the magnetic steel (3) being used for adsorption and positioning when stacking multiple pie-shaped electric heating units. The upper cover (1) is fixedly connected to the bottom case (2), and together they form the outer shell of the pie-shaped electric heating device. The active pie-shaped electric heating unit (6) is connected to an external power supply, and a PCB substrate (4) is provided inside the outer shell, on which an electronic control circuit and resistors as heating elements are integrated. The outer shell of the passive pie-shaped electric heating unit (7) is filled only with a high heat capacity filling material (5) for storing and gradually releasing heat. A combination type pipe-shaped electric heating device characterized by the following features.
2. The active pie-shaped electric heating unit (6) and the passive pie-shaped electric heating unit (7) are arranged in alternating stacks with each other. The combination type pie-shaped electric heating device according to claim 1.
3. The electronic control circuit integrated on the PCB substrate (4) includes a temperature control module for monitoring and controlling the heat generated by the resistive elements. The combination type pie-shaped electric heating device according to claim 2.
4. The number of the magnetic steel (3) is at least two, and each is symmetrically arranged inside the outer shell, near the edge. The combination type pie-shaped electric heating device according to claim 1.
5. The top lid (1) and bottom case (2) are made of a material with good thermal conductivity. The combination type pie-shaped electric heating device according to claim 1.
6. The PCB substrate (4) is suspended within the outer shell of the active pie-shaped electric heating unit (6) via support ribs, and is sealed by injecting epoxy to serve the functions of fixation and heat conduction. The combination type pie-shaped electric heating device according to claim 5.