Protection switch structure for electric heater of vehicle-mounted air conditioner
By setting up the thermostat and temperature sensor of the electric heating element and cable in the vehicle-mounted air conditioner electric heater, and combining the design of the partition and protective sleeve, the problem of shortening the service life of the cable and damage to safety is solved, and the efficient switching protection and safe operation of the electric heater is achieved.
Patent Information
- Application Number
- CN202422395211.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-30
AI Technical Summary
In existing automotive air-conditioning electric heaters, the service life of cables is shortened due to high temperatures, resulting in damage to the safety of the electric heater.
The temperature controller and cable temperature sensor are respectively provided on the electrical heating elements and cables. The temperature is monitored and the power is cut off when the temperature rises. The cable and electrical heating elements are insulated and protected in combination with the partition and protective sleeve.
It effectively avoids the cable damage due to high temperature and affects the safe use of electric heaters, ensuring efficient switching protection and safe operation of electric heaters.
Smart Images
Figure CN223014293U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicle-mounted air conditioners, and particularly relates to a protection switch structure for an electric heater of a vehicle-mounted air conditioner. Background Technique
[0002] The vehicle-mounted air-conditioning system is an indispensable part of modern vehicles, subways and other means of transportation, and it can provide a comfortable in-vehicle environment for drivers and passengers. The vehicle-mounted air-conditioning system usually includes functions such as refrigeration, heating, ventilation, and air purification. The electric heater in the vehicle-mounted air conditioner is usually used to provide additional heat to provide heat for the cab or passenger compartment. In order to ensure the safe use of the electric heater and extend the service life of the electric heater, various protection switches are usually equipped for the electric heater to prevent potential dangers caused by overheating, short circuit or other electrical faults.
[0003] The existing vehicle-mounted air-conditioning electric heaters usually adopt thermostats. If the temperature is higher than the set value, the electric heater is turned off. If the temperature is lower than the set value, the electric heater is turned on. However, the temperature suffered by the cable will affect the service life. Once the cable is damaged at high temperature, it will directly affect the safe use of the electric heater. Content of the Utility Model
[0004] The purpose of the utility model is to provide a protection switch structure for an electric heater of a vehicle-mounted air conditioner, so as to solve the problem that the existing vehicle-mounted air-conditioning electric heaters in the current market usually adopt thermostats. If the temperature is higher than the set value, the electric heater is turned off. If the temperature is lower than the set value, the electric heater is turned on. However, the temperature suffered by the cable will affect the service life. Once the cable is damaged at high temperature, it will directly affect the safe use of the electric heater as mentioned in the above background technique.
[0005] To achieve the above purpose, the utility model provides the following technical solution: A protection switch structure for an electric heater of a vehicle-mounted air conditioner, including a main body of the vehicle-mounted air-conditioning electric heater, an installation cover is arranged on the main body of the vehicle-mounted air-conditioning electric heater, and an electric heating element is installed in the installation cover. First thermostats and fuses are symmetrically arranged on both sides of both sides of the electric heating element, and a second thermostat is also installed on the side of the electric heating element. Positioning members are respectively connected to both ends of the electric heating element. A partition is clamped in the installation cover, and a cable protection pipe is arranged on one side of the partition. A cable electrically connected to the electric heating element, the first thermostat, the second thermostat and the fuse is inserted into the cable protection pipe. A cable temperature sensor is commonly installed outside the cable, and the cable temperature sensor is tightly clamped at one end of the cable protection pipe, and the cable temperature sensor is also tightly clamped on the side of the installation cover.
[0006] Preferably, electric heater cable interfaces are commonly installed at the cable ends of the electric heating element.
[0007] Preferably, sensor interfaces are respectively installed at the cable ends of the first thermostat, the second thermostat, and the cable temperature sensor.
[0008] Preferably, a heat-insulating bottom plate is screwed and fixed at the inner bottom position of the mounting cover, and an outer protective pad is also adhered to the outside of the mounting cover.
[0009] Preferably, the positioning member is fixed to the heat-insulating bottom plate by bolts, and the partition plate is fixed to the heat-insulating bottom plate by welding.
[0010] Preferably, a protective sleeve is sleeved and fastened at the part where the cable is close to the electric heating element, and the cable respectively penetrates and cooperates with the partition plate.
[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: In the protection switch structure of the in-vehicle air conditioner electric heater, thermostats and cable temperature sensors are respectively arranged on the electric heating element and the cable, so that power can be cut off in time after the temperature rises. At the same time, the fixing structure of the cable temperature sensor is stable, which can avoid the influence of the vibration during vehicle driving and ensure efficient switch protection during the operation of the electric heater. In the mounting cover for fixing the electric heating element of the protection switch structure of the in-vehicle air conditioner electric heater, a partition plate is arranged, which can insulate the cable and the electric heating element, reduce the influence of the temperature of the electric heating element on the cable, and ensure the safe use of the in-vehicle air conditioner electric heater. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is the front view of a protection switch structure of an in-vehicle air conditioner electric heater according to the present utility model;
[0013] Figure 2 is the side view of a protection switch structure of an in-vehicle air conditioner electric heater according to the present utility model;
[0014] Figure 3 is a Figure 1 magnified structural schematic diagram of part A in a protection switch structure of an in-vehicle air conditioner electric heater according to the present utility model.
[0015] In the figure: 1, in-vehicle air conditioner electric heater main body; 2, electric heating element; 3, positioning member; 4, first thermostat; 5, mounting cover; 6, outer protective pad; 7, heat-insulating bottom plate; 8, cable temperature sensor; 9, cable; 10, partition plate; 11, protective sleeve; 12, second thermostat; 13, electric heater cable interface; 14, sensor interface; 15, cable protection tube; 16, fuse. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.
[0017] Please refer to Figures 1-3, the present utility model provides a technical solution: a protection switch structure for an electric heater of a vehicle-mounted air conditioner, including a main body 1 of the electric heater of the vehicle-mounted air conditioner. An installation cover 5 is provided on the main body 1 of the electric heater of the vehicle-mounted air conditioner, and an electric heating element 2 is installed inside the installation cover 5. On both sides of the two sides of the electric heating element 2, a first temperature controller 4 and a fuse 16 are symmetrically arranged respectively. A second temperature controller 12 is also installed on the side of the electric heating element 2. The first temperature controller 4 and the second temperature controller 12 are distributed at different positions, and can perform temperature monitoring on different parts of the electric heating element 2. The ends of the cables 9 of the electric heating element 2 are jointly installed with an electric heater cable interface 13. This structure enables the electric heating element 2 to be connected to the power supply through the electric heater cable interface 13, realizing the energization and use of the electric heating element 2. The electric heating element 2 heats up to raise the air temperature and achieve the purpose of heating. Positioning members 3 are respectively connected to both ends of the electric heating element 2. A partition 10 is clamped inside the installation cover 5. One side of the partition 10 is provided with a cable protection tube 15. A cable 9 electrically connected to the electric heating element 2, the first temperature controller 4, the second temperature controller 12, and the fuse 16 is inserted into the cable protection tube 15. A cable temperature sensor 8 is jointly installed outside the cable 9. The cable ends of the first temperature controller 4, the second temperature controller 12, and the cable temperature sensor 8 are respectively installed with sensor interfaces 14. This structure enables the first temperature controller 4, the second temperature controller 12, and the cable temperature sensor 8 distributed in various places to be respectively connected through the sensor interfaces 14. The first temperature controller 4 and the second temperature controller 12 detect the temperature of the electric heating element 2. If the actual temperature is lower than the set value, the first temperature controller 4 or the second temperature controller 12 will send a signal to start the heating device of the main body 1 of the vehicle-mounted air conditioner electric heater. If the temperature is higher than the set value, the main body 1 of the vehicle-mounted air conditioner electric heater will stop heating or start the cooling device. The cable temperature sensor 8 uses a thermistor to measure the temperature outside the cable 9. Once it detects that the temperature of the cable 9 is too high, it will stop the operation of the main body 1 of the vehicle-mounted air conditioner electric heater or start the cooling device. The cable temperature sensor 8 is tightly clamped at one end of the cable protection tube 15. The cable protection tube 15 plays a role in storing and protecting the cable 9. The cable temperature sensor 8 is also tightly clamped on the side of the installation cover 5. An insulating bottom plate 7 is screwed and fixed at the bottom inner side position of the installation cover 5. An outer protection pad 6 is also adhered to the outside of the installation cover 5. This structure can perform heat insulation treatment on the electric heating element 2 during use by the insulating bottom plate 7, avoiding the high temperature of the electric heating element 2 from affecting the surrounding installation and positioning structure. The positioning member 3 is fixed to the insulating bottom plate 7 by bolts, and the partition 10 is fixed to the insulating bottom plate 7 by welding. This structure makes the partition 10 structure stable and enables the partition 10 to play a reliable isolation role for the cable 9 and the electric heating element 2, reducing the influence of the temperature at the electric heating element 2 on the cable 9 and ensuring the safe use of the main body 1 of the vehicle-mounted air conditioner electric heater. A protective sleeve 11 is tightly sleeved on the part of the cable 9 close to the electric heating element 2, and the cable 9 respectively penetrates and cooperates with the partition 10,This structure can protect the cable 9 distributed in the vicinity of the electric heating element 2, and the protective sleeve 11 is made of high-temperature resistant and heat-insulating materials to ensure the protection of the cable 9.
[0018] Working principle: When using the protection switch structure of the in-vehicle air conditioner electric heater, first, when the in-vehicle air conditioner electric heater main body 1 is working, the electric heating element 2 is turned on by connecting to the power supply through the electric heater cable interface 13. The first temperature controller 4 and the second temperature controller 12 respectively monitor the temperature of different parts of the electric heating element 2 and transmit the temperature situation through the sensor interface 14. Once the temperature rises to the set value, the in-vehicle air conditioner electric heater main body 1 is turned off. After the temperature drops, the in-vehicle air conditioner electric heater main body 1 is restarted. The cable temperature sensor 8 monitors the external temperature of the cable 9. Since the partition 10 separates the cable 9 from the electric heating element 2, the temperature influence on the cable 9 is reduced. Once the cable 9 overheats, the cable temperature sensor 8 also transmits the temperature situation through the sensor interface 14 to cut off the power supply of the in-vehicle air conditioner electric heater main body 1 in time. The fuse 16 is based on the fusing mechanism when the current is overloaded. When the current at the connection of the electric heating element 2 exceeds the rated value of the fuse 16, the internal metal wire or film quickly heats up due to heat and finally fuses to cut off the circuit to protect the in-vehicle air conditioner electric heater main body 1. The positioning part 3 fixes the electric heating element 2 firmly on the heat-insulating bottom plate 7, so that the installation cover 5 has a protective effect on the installation and positioning of the electric heating element 2. The outer protective pad 6 is used for the external protection of the installation cover 5. The cable 9 close to the electric heating element 2 is protected against high temperature by sleeving the protective sleeve 11, and the cable protection tube 15 stores the cable 9, thus completing a series of operations.
[0019] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A vehicle air-conditioning electric heater protection switch structure, comprising a vehicle air-conditioning electric heater body (1), characterized in that: The vehicle air-conditioning electric heater body (1) is provided with a mounting cover (5), and an electric heating element (2) is mounted in the mounting cover (5), and a first thermostat (4) and a fuse (16) are symmetrically arranged on both sides of both sides of the electric heating element (2), and a second thermostat (12) is also mounted on the side of the electric heating element (2), and positioning members (3) are respectively connected to both ends of the electric heating element (2), a partition (10) is clamped in the mounting cover (5), and a cable protection tube (15) is provided on one side of the partition (10), and a cable (9) electrically connected to the electric heating element (2), the first thermostat (4), the second thermostat (12) and the fuse (16) is inserted in the cable protection tube (15), and a cable temperature sensor (8) is installed on the outside of the cable (9), and the cable temperature sensor (8) is fastened and clamped to one end of the cable protection tube (15), and the cable temperature sensor (8) is also fastened and clamped to the side of the mounting cover (5).
2. The vehicle air conditioner electric heater protection switch structure according to claim 1, characterized in that: An electric heater cable interface (13) is commonly installed at the end of the cable (9) of the electric heating element (2).
3. The vehicle air-conditioning electric heater protection switch structure according to claim 1, characterized in that: The first thermostat (4), the second thermostat (12) and the end of the cable (9) of the cable temperature sensor (8) are respectively installed with a sensor interface (14).
4. The vehicle air-conditioning electric heater protection switch structure according to claim 1, characterized in that: A heat-insulating bottom plate (7) is screwed and fixed to the bottom of the inner side of the installation cover (5), and a circle of outer protective pad (6) is also bonded to the outside of the installation cover (5).
5. The vehicle air-conditioning electric heater protection switch structure according to claim 4, characterized in that: The positioning member (3) is fixed to the heat-insulating bottom plate (7) by means of bolts, and the partition plate (10) and the heat-insulating bottom plate (7) are fixed by welding.
6. The vehicle air-conditioning electric heater protection switch structure according to claim 1, characterized in that: A protective sleeve (11) is sleeved and fastened to a portion of the cable (9) close to the electric heating element (2), and the cable (9) is penetrated and matched with the partition plate (10) respectively.