Overtemperature protection control air duct type electric heater

Abstract

The utility model discloses an overtemperature protection control air duct type electric heater, which relates to the technical field of electric heaters and comprises a casing, a heater is fixedly mounted at the top end of the casing, an air inlet pipe penetrates through one side wall of the casing, a shunt pipe penetrates through one side of the top end of the air inlet pipe, an annular pipe is sleeved at the top end of the shunt pipe, and the annular pipe is sleeved at the bottom end of the casing. A plurality of first nozzles are fixedly installed at the bottom end of the annular pipe, a plurality of second nozzles are fixedly installed on the inner wall of the annular pipe, an insertion opening is formed in the top end of the air inlet pipe in an opening and closing mode, a clamping strip is movably clamped to the inner side of the insertion opening, and a first filter screen is clamped to the bottom end of the clamping strip. By arranging a series of structures, mixing of cold air and hot air in the heater is facilitated, the temperature difference occurring in the heater is reduced, regulation and control of the temperature are facilitated, the blocked filter screen can be replaced in time, interference of the blocked filter screen on the air inlet amount is reduced, and adverse effects on normal operation of the heater are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heaters, in particular to an over-temperature protection controlled air duct type electric heater. Background Art

[0002] Duct-type electric heaters are mainly used to heat the required air flow to the required air temperature. They are divided into three types: low temperature, medium temperature and high temperature, with a maximum temperature of 850°C. They have been widely used in laboratories such as aerospace and weapons industry. The hot air generated is dry and moisture-free. At the same time, the heated space heats up quickly and the temperature is controllable.

[0003] However, when using existing over-temperature protection controlled duct-type electric heaters, air flow is usually blown into the interior of the machine laterally through a fan. Since the heat generated by the electric heater is concentrated at the top of the inner side of the machine, the laterally blown air flow has less contact with the heat at the top of the inner side of the machine, resulting in difficulty in mixing the hot and cold air in the machine, which makes it easier for temperature differences to occur inside the heater, which is not conducive to temperature regulation. In addition, existing duct-type electric heaters usually install a filter at the air inlet to reduce the influx of impurities and dust in the air, and the filter is usually non-detachable when it is installed, so that a clogged filter cannot be replaced in time, which is more likely to interfere with the air flow blown in by the air inlet pipe and affect the stable operation of the heater. Utility Model Content

[0004] The purpose of the present invention is to provide an over-temperature protection controlled duct type electric heater to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an over-temperature protection controlled air duct type electric heater, comprising a housing, a heater fixedly mounted on the top of the housing, an air inlet pipe passing through one side wall of the housing, a diverter pipe passing through one side of the top of the air inlet pipe, an annular tube sleeved on the top of the diverter pipe, a plurality of first nozzles fixedly mounted on the bottom end of the annular tube, a plurality of second nozzles fixedly mounted on the inner wall of the annular tube, and a socket opened and closed at the top of the air inlet pipe;

[0006] A card strip is movably engaged with the inner side of the socket, a first filter is engaged with the bottom end of the card strip, a second filter is provided at the bottom of the first filter, a bottom block is fixedly connected to the bottom end of the second filter, a sleeve is provided on the outside of the second filter, a fan is fixedly installed at the pipe mouth of the air inlet pipe, a heat reflecting plate is fixedly installed at the bottom inside the casing, and an air outlet pipe is passed through the other side wall of the casing.

[0007] Preferably, the diverter pipe is communicated with the interior of the air inlet pipe, and the diverter pipe passes through the top of one side wall of the casing.

[0008] Preferably, a thermostat is fixedly mounted on the inner wall of the casing, and the thermostat is electrically connected to the heater.

[0009] Preferably, the bottom end of the first filter is fixedly connected to a first clamping block, and the bottom end of the first clamping block is movably engaged with a second clamping block.

[0010] Preferably, the bottom end of the second clamping block is fixedly connected to the top end of the second filter screen, and the second filter screen is movably connected to the first filter screen through the second clamping block.

[0011] Preferably, an opening is provided on the top of the sleeve, and the sleeve is movably connected to the second filter screen through the opening.

[0012] Preferably, the sleeve is movably connected to the air inlet pipe, and a notch is provided at the junction of the sleeve and the bottom end of the air inlet pipe.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. This over-temperature protection controlled duct type electric heater, through the shunt pipe, annular pipe, first nozzle, second nozzle and heat reflecting plate, allows the airflow blown in by the fan to enter the interior of the heater from both horizontal and vertical downward directions at the same time, so that the heat accumulated at the top inner side of the heater can circulate in the heater under the drive of the airflow, thereby facilitating the mixing of cold and hot air inside the heater, reducing the temperature difference inside the heater, and being more conducive to temperature control.

[0015] 2. This over-temperature protection control duct type electric heater, through the card strip, notch, first filter, second filter and sleeve box, makes it possible for the filter at the air inlet of the heater to be removed from the air inlet pipe in time without stopping the heater when it is blocked, and will not affect the normal operation of the heater, thereby facilitating the removal of the filter from the air inlet pipe of the heater, facilitating timely replacement of the blocked filter, reducing the interference of the blocked filter on the air intake volume, and reducing the adverse effects on the normal operation of the heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the box and socket structure of the utility model;

[0018] Figure 3 This is a schematic structural diagram of the first filter and the second filter of the present invention;

[0019] Figure 4 This is a schematic structural diagram of the annular tube and the first nozzle of the utility model.

[0020] In the figure: 1. Heater; 2. Casing; 3. Air outlet duct; 4. Diverter duct; 5. Air inlet duct; 6. Thermostat; 7. Ring duct; 8. First nozzle; 9. Card strip; 10. Socket; 11. First filter; 12. First card block; 13. Second card block; 14. Second filter; 15. Box; 16. Bottom block; 17. Fan; 18. Heat reflection plate; 19. Second nozzle. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0024] like Figures 1 to 4 As shown, the over-temperature protection control duct type electric heater of this embodiment includes a housing 2, a heater 1 is fixedly mounted on the top of the housing 2, an air inlet pipe 5 is penetrated through one side wall of the housing 2, a diverter pipe 4 is penetrated through one side of the top of the air inlet pipe 5, an annular pipe 7 is sleeved on the top of the diverter pipe 4, a plurality of first nozzles 8 are fixedly mounted on the bottom end of the annular pipe 7, a plurality of second nozzles 19 are fixedly mounted on the inner wall of the annular pipe 7, and a socket 10 is opened and closed at the top of the air inlet pipe 5;

[0025] A card strip 9 is movably engaged with the inner side of the socket 10, and a first filter screen 11 is engaged with the bottom end of the card strip 9. A second filter screen 14 is provided at the bottom of the first filter screen 11, and a bottom block 16 is fixedly connected to the bottom end of the second filter screen 14. A sleeve 15 is provided on the outside of the second filter screen 14, and a fan 17 is fixedly installed at the pipe mouth of the air inlet pipe 5. A heat reflecting plate 18 is fixedly installed at the bottom of the inner side of the casing 2, and an air outlet pipe 3 is passed through the other side wall of the casing 2.

[0026] Specifically, the inner wall of the casing 2 is covered with a heat-insulating material so that heat can be absorbed by the blown-in airflow, reducing heat loss. The function of the diverter pipe 4 is to direct part of the airflow entering the air inlet pipe 5 to the top of the inner side of the casing 2, so that the airflow can be blown downward from the top of the inner side of the casing 2, so that the heat accumulated at the top of the inner side of the casing 2 can quickly sink to the middle and bottom of the casing 2, thereby facilitating the mixing of hot and cold air inside the casing 2, reducing the temperature difference inside the casing 2, and making it more conducive to the over-temperature control of the temperature inside the casing 2 by the thermostat 6. The function of the annular pipe 7 is to allow the airflow to surround the heater 1 when blowing from top to bottom, so that the flow rate of the air around the heater 1 is faster, which is more conducive to The hot and cold air inside the casing 2 are mixed, the first nozzle 8 allows the airflow to be blown from top to bottom, and the second nozzle 19 allows the airflow to be blown into the middle of the heater 1, so that the heat generated by the heater 1 can be dissipated faster, thereby helping to improve the heating efficiency of the heater 1 on the air. The function of the socket 10 is to facilitate the extraction of the filter from the top of the air inlet pipe, so as to facilitate the timely extraction of the filter from the inside of the air inlet pipe 5. The function of the card strip 9 is to facilitate the upward extraction of the first filter 11. The first filter 11 and the second filter 14 are the same size, the mesh number is ten, and they are stacked on the same vertical plane. The function of the sleeve 15 is to protect the unused second filter 14 and to facilitate the removal of the second filter 14 after use.

[0027] Furthermore, the diverter pipe 4 is connected to the interior of the air inlet pipe 5, and the diverter pipe 4 passes through the top of one side wall of the casing 2. The function of the diverter pipe 4 is to direct part of the air flow in the air inlet pipe 5 into the annular pipe 7, so that part of the air flow can be blown downward from the bottom inside the casing 2, thereby facilitating the formation of microcirculation of the air flow inside the casing 2, and is more conducive to the mixing of cold and hot air in the casing 2.

[0028] Furthermore, a thermostat 6 is fixedly mounted on the inner wall of the casing 2 , and the thermostat 6 is electrically connected to the heater 1 . The thermostat 6 can control the over-temperature of the heater 1 , thereby avoiding the over-temperature of the heater 1 .

[0029] Furthermore, the bottom end of the first filter 11 is fixedly connected to the first card block 12, and the bottom end of the first card block 12 is movably engaged with the second card block 13. The bottom of the first card block 12 and the top of the second card block 13 are both provided with plug-in interfaces, so that the first card block 12 can be engaged with the second card block 13, so that when the first filter 11 is pulled upward, it can drive the second filter 14 to be pulled up, thereby realizing the alternating replacement of the filters.

[0030] Furthermore, the bottom end of the second block 13 is fixedly connected to the top end of the second filter screen 14, and the second filter screen 14 is movably connected to the first filter screen 11 through the second block 13. The first block 12 and the second block 13 can be separated by sliding, thereby facilitating the separation of the first filter screen 11 and the second filter screen 14.

[0031] Furthermore, an opening is provided at the top of the sleeve 15, and the sleeve 15 is movably connected to the second filter 14 through the opening. The opening at the top of the sleeve 15 allows the second filter 14 to pass through and into the top of the sleeve 15, thereby avoiding interference with the sliding out and sliding in of the second filter 14.

[0032] Furthermore, the sleeve 15 is movably connected to the air inlet pipe 5, and a notch is provided at the junction of the sleeve 15 and the bottom end of the air inlet pipe 5. The function of the notch is to enable the second filter 14 to smoothly enter the air inlet pipe 5 after passing through the sleeve 15, and replace the first filter 11 pulled upward, thereby realizing timely replacement of the filter at the air inlet pipe 5.

[0033] Furthermore, the socket 10, the opening and the notch are all provided with magnetic sheets, which can magnetically adsorb the first card block 12, the second card block 13 and the bottom block 16 which are all made of magnetic materials, thereby facilitating temporary locking of the first filter 11 and the second filter 14 after replacement.

[0034] The method of using this embodiment is as follows: when using the present over-temperature protection control duct type electric heater 1, it is necessary to first connect the heater 1 to an external power supply, and then start the fan 17 to allow air to flow into the air inlet pipe 5. At this time, the air will enter the air inlet pipe 5 and the branch pipe 4 respectively. The airflow entering the air inlet pipe 5 will be blown horizontally to the heater 1, and the airflow entering the branch pipe 4 will enter the annular pipe 7, and then be blown out vertically downward from the first nozzle 8 on the annular pipe 7 and horizontally gathered by the second nozzle 19, so that the airflow is micro-circulated from top to bottom in the casing 2. Then the heater 1 can be started to heat the airflow blown into the casing 2. At this time, the heat at the top inner side of the casing 2 will flow downward in the casing 2 under the action of the first nozzle 8 and the second nozzle 19, and after reaching the heat reflecting plate 18, it will flow upward and mix with the horizontal airflow, and then be blown out from the air outlet pipe 3. When the filter at the air inlet pipe 5 needs to be replaced, the card strip 9 can be pulled out upward so that the first filter 11 is Pull up, so that the first clamping block 12 at the bottom of the first filter 11 bites the second clamping block 13 and pulls up, so that the second filter 14 at the bottom of the second clamping block 13 passes through the opening and the notch from the inside of the bottom box into the air inlet 5, until the first filter 11 is separated from the socket 10, the second clamping block 13 will move into the socket 10, and the bottom block 16 will move into the notch. At this time, the second filter 14 is temporarily magnetically attracted to the air inlet 5, and the first filter 11 is removed from the air inlet 5 in time, and then you can Pull the first filter 11 to one side to separate the first filter 11 from the second filter 14. After the first filter 11 is cleaned, the first clamping block 12 at the bottom of the first filter 11 can be re-engaged with the second clamping block 13 at the top of the second filter 14. Then, the second clamping block 13 can be pushed downward to return the second filter 14 to the sleeve 15. Finally, the sleeve 15 can be pulled sideways so that the second filter 14 and the sleeve 15 can be taken out from the bottom end of the air inlet pipe 5 for cleaning or replacement.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An over-temperature protection controlled air duct type electric heater, comprising a housing (2), characterized in that: A heater (1) is fixedly mounted on the top of the housing (2), an air inlet pipe (5) is passed through a side wall of the housing (2), a diversion pipe (4) is passed through one side of the top of the air inlet pipe (5), an annular pipe (7) is sleeved on the top of the diversion pipe (4), a plurality of first nozzles (8) are fixedly mounted on the bottom end of the annular pipe (7), a plurality of second nozzles (19) are fixedly mounted on the inner wall of the annular pipe (7), and a socket (10) is opened and closed at the top of the air inlet pipe (5); A card strip (9) is movably engaged on the inner side of the socket (10), a first filter (11) is engaged on the bottom end of the card strip (9), a second filter (14) is provided at the bottom of the first filter (11), a bottom block (16) is fixedly connected to the bottom end of the second filter (14), a sleeve (15) is provided on the outside of the second filter (14), a fan (17) is fixedly installed at the pipe mouth of the air inlet pipe (5), a heat reflection plate (18) is fixedly installed on the bottom of the inner side of the casing (2), and an air outlet pipe (3) is passed through the other side wall of the casing (2).

2. The over-temperature protection controlled duct type electric heater according to claim 1, characterized in that: The diverter pipe (4) is in communication with the interior of the air inlet pipe (5), and the diverter pipe (4) passes through the top of a side wall of the casing (2).

3. The over-temperature protection controlled duct type electric heater according to claim 1, characterized in that: A thermostat (6) is fixedly mounted on the inner wall of the housing (2), and the thermostat (6) is electrically connected to the heater (1).

4. The over-temperature protection controlled duct type electric heater according to claim 1, characterized in that: The bottom end of the first filter screen (11) is fixedly connected to a first clamping block (12), and the bottom end of the first clamping block (12) is movably engaged with a second clamping block (13).

5. The over-temperature protection controlled duct type electric heater according to claim 4, characterized in that: The bottom end of the second clamping block (13) is fixedly connected to the top end of the second filter screen (14), and the second filter screen (14) is movably connected to the first filter screen (11) through the second clamping block (13).

6. The over-temperature protection controlled duct type electric heater according to claim 1, characterized in that: An opening is provided on the top of the sleeve (15), and the sleeve (15) is movably connected to the second filter screen (14) through the opening.

7. The over-temperature protection controlled duct type electric heater according to claim 1, characterized in that: The sleeve box (15) is movably connected to the air inlet pipe (5), and a notch is provided at the junction of the sleeve box (15) and the bottom end of the air inlet pipe (5).

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