Preheater device of centralized fresh air system

Abstract

The utility model provides a preheater device of a centralized fresh air system, which comprises a shell, two PTC (Positive Temperature Coefficient) heaters arranged in the shell, a PCBA (Printed Circuit Board Assembly) connected with the upper ends of the two PTC heaters through bolts, and an upper cover arranged above the shell and used for fixing the PCBA, a clamping groove is formed in the front end of the shell, a temperature fuse is fixedly arranged in the clamping groove, and the temperature fuse has the advantages of being compact in structure, convenient to install, high in safety and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the new trend system equipment technical field especially, and it is a kind of preheater device of centralized new trend system. BACKGROUND

[0002] Centralized new trend system is according to in closed indoor one side with special equipment to send new trend to indoor, again from another side by special equipment to outdoor exhaust, in indoor form " new trend flow field ", to meet the need of indoor new trend ventilation, in winter, when outdoor temperature is too low, to make centralized new trend system can normally operate, need to install frost-proof preheater on new fan outdoor air side, make it heat cold outdoor air to certain degree, to ensure that heat exchanger does not freeze, but the preheater structure design of present is unreasonable, occupies large space and installs complex, in addition, lack of over-temperature power-off protection, and safety is not high. SUMMARY

[0003] The utility model provides a kind of preheater device of centralized new trend system of structural optimization, it is easy to install, and safety is high.

[0004] To solve the above technical problem, the technical scheme adopted by the utility model is: a kind of preheater device of centralized new trend system, including shell, two PTC heaters being arranged in the shell, PCBA circuit board being bolted with the upper end of the two PTC heaters and upper cover being arranged on the shell for fixing PCBA circuit board, the rear end of the shell is fixed with baffle by first positioning column, the front end of the shell is provided with clamping recess, temperature fuse is fixedly arranged in the clamping recess.

[0005] Further, the shell includes front panel, side panel oppositely arranged at both ends of the front panel and bottom plate for connecting side panel at lower end of front panel, a plurality of through holes are formed on the front panel, the front panel, side panel and bottom plate form accommodating cavity, two PTC heaters are located in accommodating cavity, and partition plate is arranged between two PTC heaters, and the partition plate is fixedly arranged on the front panel.

[0006] Further, the upper end of the front panel and side panel is provided with nut column, the PCBA circuit board and upper cover are provided with mounting hole corresponding with nut column, and the PCBA circuit board is fixedly arranged between upper cover and shell by nut column and mounting hole.

[0007] Further, the first positioning column is fixedly arranged on the side panel away from the front panel, the wind baffle is provided with a first positioning hole matched with the first positioning column, and the wind baffle is fixedly connected with the side panel through the first positioning hole and the first positioning column.

[0008] Further, the wind baffle is provided with a plurality of parallel arranged holes, and the plurality of holes gradually decrease from left to right.

[0009] Further, the PCBA circuit board and the front panel upper end are provided with a heat insulation plate, the front panel upper end is provided with a second positioning column, the heat insulation plate is provided with a second positioning hole matched with the second positioning column, and the heat insulation plate is fixedly arranged on the upper end of the front panel through the second positioning column and the second positioning hole.

[0010] Compared with the prior art, the preheater device has the advantages and beneficial effects that:

[0011] The preheater device of the utility model has the advantages that: the connection position and the connection structure between various structures are optimized, the preheater device is convenient to install and compact in structure, the temperature fuse is arranged at the front end of the shell, the electrical shell can be effectively protected from high temperature, power-off protection is realized when the temperature is too high, and the safety is higher. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the overall structure schematic view of the preheater device of the centralized fresh air system of the utility model;

[0013] Figure 2 It is Figure 1 The rear view structure schematic view of

[0014] Figure 3 It is Figure 1 The exploded structure schematic view of

[0015] Figure 4 It is the structure assembly schematic view of the preheater device of the centralized fresh air system of the utility model after removing the upper cover and the wind baffle;

[0016] Figure 5 It is the side view structure schematic view of Figure 4

[0017] Figure 6 It is the shell structure schematic view of the preheater device of the centralized fresh air system of the utility model;

[0018] Figure 7 ​It is the baffle structure schematic view of the preheater device of the centralized fresh air system.

[0019] In the figure: 1 - shell;2 - PTC heater;3 - PCBA circuit board;4 - upper cover;5 - first positioning column;6 - baffle;7 - clamping groove;8 - temperature fuse;9 - front panel;10 - side panel;11 - bottom plate;12 - through hole;13 - containing cavity;14 - partition;15 - nut column;16 - mounting hole;17 - first positioning hole;18 - clamping plate;19 - clamping groove;20 - aperture;21 - heat insulation plate;22 - second positioning column;23 - second positioning hole. DETAILED DESCRIPTION

[0020] The specific embodiments of the utility model are described in detail below with reference to the drawings.

[0021] As Figures 1-7 Indicated, a kind of preheater device of centralized fresh air system, including shell 1, two PTC heaters 2 being arranged in shell 1 interior, with the PCBA circuit board 3 of the upper end bolt connection of two PTC heaters 2 and the upper cover 4 for fixing PCBA circuit board 3 being arranged above shell 1, the rear end of shell 1 is fixed with baffle 6 by first positioning column 5, the front end of shell 1 is provided with clamping groove 7, temperature fuse 8 is fixedly arranged in clamping groove 7.

[0022] The preheater device of the utility model reaches the effect such as convenient installation, compact structure by the optimization of the connecting position and connecting structure between each structure, in addition, by setting temperature fuse 8 in the front end of shell 1, can effectively protect electrical shell 1 from the influence of excessively high temperature, and excessively high temperature realizes power-off protection, and higher safety.

[0023] Among them, PCBA circuit board 3 for electronic control and fresh air machine main circuit board are connected in communication by a power supply interface and a control interface, realize the control to preheater, PTC heater and PCBA circuit board electrically connected, by PCBA circuit board control its opening, temperature fuse both ends line leads to PCBA circuit board, by PCBA circuit board control.

[0024] The temperature and humidity sensor is arranged on the outside air side of the fresh air machine. When the temperature and humidity sensor detects that the outside air temperature is minus 3 degrees Celsius, the signal data is transmitted to the PCBA circuit board 3, and the automatic opening of the preheater is realized through the control of the PCBA circuit board 3. After the PTC heater 2 is started to heat the outside air, the heated air enters the heat exchanger for heat exchange, thereby solving the problem of frost on the heat exchanger. In addition, the output power of the PTC heater 2 is limited to 1700W. When the flow rate of the fresh air machine is too high or the outside temperature is low and reaches the power limit of the PTC heater 2, the flow rate of the fresh air machine is automatically reduced, thereby improving the safety of the equipment operation.

[0025] Further, the shell 1 includes a front panel 9, side panels 10 arranged opposite to both ends of the front panel 9, and a bottom plate 11 located at the lower end of the front panel 9 for connecting the side panels 10. A plurality of through holes 12 are arranged on the front panel 9, and the through holes 12 are in communication with the outside cold air, so that the cold air can enter the shell and be heated by the PTC heater 2. The front panel 9, the side panels 10 and the bottom plate 11 form a containing cavity 13 therebetween, and the two PTC heaters 2 are located in the containing cavity 13. A partition plate 14 is arranged between the two PTC heaters 2, and the partition plate 14 is fixedly arranged on the front panel 9. The containing cavity 13 is optimized in space by arranging the partition plate 14, and the installation position of the PTC heater 2 is clear, thereby optimizing the overall structure. In addition, the partition plate 14 is integrally formed with the front panel 9, so that the overall structure is better.

[0026] Further, the upper ends of the front panel 9 and the side panels 10 are provided with nut columns 15, and the PCBA circuit board 3 and the upper cover 4 are provided with mounting holes 16 corresponding to the nut columns 15. The PCBA circuit board 3 is fixedly arranged between the upper cover 4 and the shell 1 through the nut columns 15 and the mounting holes 16.

[0027] Specifically, after the PTC heater 2 is fixed to the PCBA circuit board 3 by bolts, the PCBA circuit board 3 is supported by being placed on the nut columns 15, and then the upper cover 1 is placed. The PCBA circuit board 3 is fixedly installed by screwing the bolts through the mounting holes 16 and the nut columns 15.

[0028] Further, the first positioning column 5 is fixedly arranged on the side panel 10 away from the front panel 9. The wind baffle 6 is provided with a first positioning hole 17 matched with the first positioning column 5. The wind baffle 6 is fixedly connected with the side panel 10 through the first positioning hole 17 and the first positioning column 5. The wind baffle 6 is provided with a clamping plate 18 integrally formed thereon. The upper cover 4 is provided with a clamping groove 19 matched with the clamping plate 18. The upper end of the wind baffle 6 is fixed in the upper cover 4 through the clamping plate 18 and the clamping groove 19.

[0029] Specifically, the mounting of the wind baffle 6 first puts the clamping plate 18 into the clamping groove 19 of the upper cover 4, and then clamps the first positioning column 5 into the first positioning hole 17, so as to realize the fixed mounting of the wind baffle 6, and the connection structure is simple and convenient to disassemble.

[0030] Further, the wind baffle 6 is provided with a plurality of parallel arranged apertures 20, and the plurality of apertures 20 gradually decrease from left to right.

[0031] Specifically, the wind baffle 6 is mainly used to output uniform temperature and air volume to the heat exchanger, and by arranging apertures 20 of different sizes on the wind baffle 6, the air volume passing through the cross section is adjusted to be more uniform.

[0032] Further, the heat insulation plate 21 is arranged between the PCBA circuit board 3 and the upper end of the front panel 9, the second positioning column 22 is arranged at the upper end of the front panel 9, the second positioning hole 23 matched with the second positioning column 22 is arranged on the heat insulation plate 21, and the heat insulation plate 21 is fixedly arranged at the upper end of the front panel 9 through the second positioning column 22 and the second positioning hole 23. The heat insulation plate 21 is fixed by sleeving the second positioning hole 23 on the second positioning column 22, the PCBA circuit board 3 and the PTC heater 2 are isolated by arranging the heat insulation plate 21, the damage of the PCBA circuit 3 caused by excessively high temperature is effectively prevented, and in addition, the height of the second positioning column 22 is the same as that of the nut column 15, so that the PCBA circuit board 3 is supported.

[0033] The working process of the utility model is: when the external air temperature is minus 3 degrees Celsius, the preheater device is automatically started, the PTC heater is controlled to heat the air, and the heated air is uniformly delivered into the heat exchanger through the wind baffle, effectively solving the problem of frost of the heat exchanger, and the temperature fuse is arranged on the front panel, when the shell temperature is too high, the power is cut off to realize protection, the safety is higher, and in addition, the optimization of the structure of the preheater device has the advantages of convenient installation and compact structure.

[0034] The above embodiment of the utility model is described in detail, but the content is only the preferred embodiment of the utility model, and cannot be considered as limiting the scope of the utility model. Any equivalent change and improvement within the scope of the utility model application should still belong to the patent coverage range of the utility model.

Claims

1. A preheater device of a centralized fresh air system, characterized by: The shell, two PTC heaters arranged inside the shell, the PCBA circuit board bolted with the upper ends of the two PTC heaters and the upper cover arranged above the shell for fixing the PCBA circuit board, the rear end of the shell is fixedly provided with a wind deflector through a first positioning column, the front end of the shell is provided with a clamping groove, and a temperature fuse is fixedly arranged in the clamping groove.

2. The preheater device of a centralized fresh air system according to claim 1, characterized in that: The shell includes a front panel, side panels oppositely arranged at both ends of the front panel, and a bottom plate arranged at the lower end of the front panel for connecting the side panels, a plurality of through holes are arranged on the front panel, an accommodating cavity is formed between the front panel, the side panels and the bottom plate, two PTC heaters are arranged in the accommodating cavity, and a partition plate is arranged between the two PTC heaters.

3. The preheater device of a centralized fresh air system according to claim 2, characterized in that: The upper end of the front panel and the side panel is provided with a nut column, the PCBA circuit board and the upper cover are provided with mounting holes corresponding to the nut column, and the PCBA circuit board is fixedly arranged between the upper cover and the shell through the nut column and the mounting hole.

4. The preheater device of a centralized fresh air system according to claim 2, characterized in that: The first positioning column is fixedly arranged on the side panel away from the front panel, the wind deflector is provided with a first positioning hole matched with the first positioning column, the wind deflector is fixedly connected with the side panel through the first positioning hole and the first positioning column, the upper end of the wind deflector is provided with a clamping plate integrally formed with the wind deflector, the upper cover is provided with a clamping groove matched with the clamping plate, and the upper end of the wind deflector is fixedly arranged in the upper cover through the clamping plate and the clamping groove.

5. A preheater device for a centralized fresh air system according to claim 4, characterized in that The wind deflector is provided with a plurality of parallel arranged apertures, and the plurality of apertures gradually decrease from left to right.

6. The preheater device of a centralized fresh air system according to claim 2, characterized in that: The PCBA circuit board and the upper end of the front panel are provided with a heat insulation plate, the upper end of the front panel is provided with a second positioning column, the heat insulation plate is provided with a second positioning hole matched with the second positioning column, The heat insulation plate is fixedly arranged at the upper end of the front panel through the second positioning column and the second positioning hole. ​

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