Quilt warming device

Abstract

The quilt warming device comprises a shell provided with a draught fan installation cavity, an air supply channel and an air return channel, and the draught fan installation cavity is provided with a draught fan and provided with an outer circulation air inlet; the air supply channel is provided with a heating body and an air supply outlet; the air return channel is provided with an internal circulation air inlet; the air return channel is provided with an air return switch which is used for opening and closing the air return channel and adjusting the opening degree of the air return channel. When the quilt warming operation is executed, the draught fan sucks outside air into the air supply channel from the outer circulation air inlet and / or hot air in the quilt from the inner circulation air inlet, and the hot air is heated by the heating body and then fed into the quilt from the air supply outlet. The internal and external circulation modes are switched by opening and closing the air return channel and adjusting the opening degree of the air return channel through the air return switch, so that hot air in the quilt is recycled to circularly heat and supply air, the effect of rapidly heating and warming the quilt is achieved, the hot air fed into the quilt is prevented from being lost in vain, and quilt warming resources are saved.

Description

Technical Field

[0001] The invention belongs to the technical field of quilt warming devices, and in particular relates to a quilt warming device. Background Art

[0002] A quilt warmer is a small appliance that can be used in cold or humid weather to warm the quilt, dehumidify and remove mites. It heats the quilt by passing the outside air through a heating element and then blowing it into the quilt, and then the heated air heats the quilt, thus quickly raising the temperature of the quilt.

[0003] When the existing quilt warmer is heating, the main unit or air inlet equipped with the fan is generally located outside the quilt, and a long air outlet duct equipped with an air outlet is extended into the quilt, and the hot air is sent into the quilt through the air outlet duct. Because the air inlet of the main unit is located outside the quilt, the quilt warmer can only draw air outside the quilt for heating, and cannot return the hot air sent into the quilt for recycling. The hot air in the quilt can only be lost in vain. In addition, the existing quilt warmer only has the above-mentioned single air intake and air supply mode from the outside of the quilt, and cannot achieve multi-mode switching, resulting in a significant decrease in the effect of rapid heating of the quilt. Summary of the invention

[0004] In response to the problems raised by the background technology, the present invention proposes a quilt warming device, which recovers the hot air in the quilt for circulating heating and air supply by setting a return air switch to open and close the return air channel and adjust the opening of the return air channel. It can quickly increase the temperature of the air sent into the quilt to achieve the effect of quickly heating the quilt. At the same time, the air heat energy in the quilt is recovered and recycled to avoid the hot air sent into the quilt from being lost in vain, thereby saving quilt warming resources.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A quilt warmer comprises a housing provided with a fan installation cavity, an air supply channel and an air return channel;

[0007] The fan installation cavity is installed with a fan and is provided with an external circulation air inlet;

[0008] The air supply channel is installed with a heating body and is provided with an air supply port;

[0009] The return air channel is provided with an internal circulation air inlet;

[0010] The outer circulation air inlet is connected to the air supply channel through the fan installation cavity, and the inner circulation air inlet is connected to the fan installation cavity and the air supply channel in sequence through the return air channel;

[0011] The return air channel is provided with a return air switch, and the return air switch is used to open and close the return air channel and adjust the opening degree of the return air channel;

[0012] When performing the warm quilt operation, the blower sucks outside air from the outer circulation air inlet and / or hot air in the quilt from the inner circulation air inlet into the air supply channel, and then sends it into the quilt interior from the air outlet after being heated by the heating element.

[0013] Preferably, the return air switch includes a rotating plate, a rotating shaft, a knob, and a mounting vertical plate;

[0014] The mounting vertical plate is erected on the side of the return air channel and is disposed opposite to the housing. The rotating shaft penetrates through the housing at an angle perpendicular to the return air direction and is movably installed on the mounting vertical plate;

[0015] The rotating plate is installed on the shaft body of the rotating shaft, and the knob is installed at one end of the rotating shaft exposed outside the housing;

[0016] Rotate the knob to make the rotating plate rotate around the rotating shaft, so as to adjust the distance between the rotating plate and the return air channel to open and close the return air channel and adjust the opening degree of the return air channel.

[0017] Preferably, the air inlet end of the air supply channel communicates with the air outlet end of the blower installation cavity, and the air outlet end of the air supply channel is provided with the air outlet;

[0018] The air inlet end of the return air channel is provided with the inner circulation air inlet, and the air outlet end of the return air channel communicates with the air inlet end of the blower installation cavity;

[0019] The outer circulation air inlet is provided at the air inlet end of the blower installation cavity;

[0020] When performing the warm quilt operation, the outer circulation air inlet is placed outside the quilt, and the air outlet and the inner circulation air inlet are placed inside the quilt.

[0021] Preferably, the surface of the housing is recessed inward to form a receiving cavity, and a baffle is flip-mounted in the receiving cavity. The baffle can be flipped out of the receiving cavity and erected on the surface of the housing.

[0022] Preferably, an electric control installation cavity is provided between the air supply channel and the return air channel. The electric control installation cavity separates the air supply channel and the return air channel to make the air outlet and the inner circulation air inlet independent of each other;

[0023] The electric control installation cavity is installed with an electric control board.

[0024] Preferably, air outlet grille plates are provided at both the air outlet and the inner circulation air inlet, and the air outlet grille plates are provided with blocking nets;

[0025] Preferably, the air outlet and the inner circulation air inlet share one air outlet grille plate.

[0026] Preferably, temperature sensors are provided at both the top and bottom of the air supply channel, and a thermal fuse is configured at the top of the air supply channel, and the thermal fuse is electrically connected to the heating element.

[0027] Preferably, the housing is provided with a wire receiving hole, and the wire receiving hole communicates with the return air channel;

[0028] A wire routing groove is provided in the cavity of the electric control installation cavity, and the electric control installation cavity communicates with the return air channel through the wire routing groove.

[0029] Preferably, it includes a filter screen;

[0030] A card slot is provided on the wall surface where the edge of the filter screen is located, and a convex block protrudes from the surface of the filter screen;

[0031] A clamping block adapted to the card slot protrudes from the wall surface of the air inlet end of the fan installation cavity;

[0032] Through the card insertion cooperation between the card slot and the clamping block, the filter screen is detachably installed at the air inlet end of the fan installation cavity.

[0033] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0034] 1. The device extracts external air through a fan, heats it and sends it into the quilt for external circulation to warm the quilt, so as to achieve the effect of quickly heating and raising the temperature of the quilt. Through the return air switch, on the basis of the external circulation quilt warming method, the internal circulation return air heating method is adopted, and the hot air sent into the quilt is re-extracted, reheated and then sent into the quilt. On the basis of the conventional quilt warming method, the hot air in the quilt is circulated and heated and sent, which can quickly raise the temperature of the air sent into the quilt, so as to achieve the effect of quickly heating and warming the quilt. At the same time, the air heat energy in the quilt is recycled, avoiding the waste of the hot air sent into the quilt, so as to save the quilt warming resources;

[0035] 2. By controlling the opening degree of the return air channel through the return air switch, the return air volume of the hot air in the quilt is adjusted, so as to adjust the heating efficiency of the quilt temperature;

[0036] 3. The device is configured with a baffle for pressing against the edge of the quilt to separate the internal circulation air inlet and air outlet in the quilt from the external circulation air inlet outside the quilt, avoiding the external circulation air inlet from adsorbing the quilt. The baffle can be turned over, folded and stored. At the same time, the return air channel is designed as a power cord storage place, with a small overall volume and convenient storage;

[0037] 4. The internal circulation air inlet and air outlet of the device share a single air outlet grille, and the internal circulation air inlet is designed in a hidden manner, achieving a beautiful appearance. Description of the Drawings

[0038] Figure 1 is a schematic structural diagram of the quilt warmer of the present invention;

[0039] Figure 2 is a schematic structural diagram of the quilt warmer (visible accommodation cavity and external circulation air inlet) of the present invention;

[0040] Figure 3 is a schematic internal structural diagram of the quilt warmer (visible temperature detector and temperature fuse) of the present invention;

[0041] Figure 4 is a schematic internal structural diagram of the quilt warmer (visible air inlet and outlet direction) of the present invention;

[0042] Figure 5 is a schematic internal structural diagram of the quilt warmer of the present invention;

[0043] Figure 6 is a schematic structural diagram of the filter net of the present invention.

[0044] Housing 1, fan installation cavity 2, external circulation air inlet 21, fan 22, air supply channel 3, air supply port 31, temperature sensor 32, temperature fuse 33, return air channel 4, internal circulation air inlet 41, return air switch 42, rotating plate 421, rotating shaft 422, knob 423, installation vertical plate 424, electronic control installation cavity 5, electronic control board 51, wire groove 52, wire receiving hole 53, heating element 6, accommodation cavity 71, baffle 72, air outlet grille 81, blocking net 82, filter net 91, card slot 92, clamping block 93, convex block 94. Detailed implementation manners

[0045] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation manners.

[0046] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0047] In the description and claims of the present invention and the above-mentioned drawings, the terms "first", "second", etc. are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product or terminal that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products or terminals.

[0048] Reference to "embodiment" herein means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present invention. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0049] This application proposes a quilt warming device, such as Figures 1 to 6 shown, including a housing 1 configured with a fan installation cavity 2, a air supply channel 3, and a return air channel 4;

[0050] The fan installation cavity 2 is installed with a fan 22 and configured with an external circulation air inlet 21;

[0051] The air supply channel 3 is installed with a heating element 6 and configured with an air supply port 31;

[0052] The return air channel 4 is configured with an internal circulation air inlet 41;

[0053] The external circulation air inlet 21 communicates with the air supply channel 3 through the fan installation cavity 2, and the internal circulation air inlet 41 communicates with the fan installation cavity 2 and the air supply channel 3 in sequence through the return air channel 4;

[0054] The return air channel 4 is provided with a return air switch 42, and the return air switch 42 is used to open and close the return air channel 4 and adjust the opening degree of the return air channel 4;

[0055] When performing the quilt warming operation, the fan 22 sucks the outside air from the external circulation air inlet 21 and / or the hot air in the quilt from the internal circulation air inlet 41 into the air supply channel 3, so as to be sent into the inside of the quilt from the air supply port 31 after being heated by the heating element 6.

[0056] In this embodiment, a blower installation cavity 2, a air supply channel 3 and a return air channel 4 are arranged inside the housing 1 of the quilt warmer. In a specific embodiment, the blower installation cavity 2 is located at the rear of the housing 1, and the air supply channel 3 and the return air channel 4 are arranged side by side at the front of the housing 1. The blower installation cavity 2 is used for installing a blower 22 and is configured with an external circulation air inlet 21. One end of the air supply channel 3 is communicated with the blower installation cavity 2, and the other end is configured with an air supply outlet 31. A heating element 6 is arranged in the air supply channel 3, and the heating element 6 is generally arranged on the side close to the blower installation cavity 2. One end of the return air channel 4 is communicated with the blower installation cavity 2, and the other end is configured with an internal circulation air inlet 41. In this embodiment, the internal circulation air inlet 41 is juxtaposed with the air supply outlet 31.

[0057] As Figures 3 to 5 shown, in the first embodiment, when the quilt warming operation is performed, the side of the air supply outlet 31 and the internal circulation air inlet 41 is extended into the quilt, and the side of the external circulation air inlet 21 is exposed outside the quilt. When the blower 22 is started, the blower 22 can draw in the outside air from the external circulation air inlet 21 and send the outside air into the air supply channel 3 through the blower installation cavity 2. After being heated by the heating element 6 in the air supply channel 3, it forms hot air and continues to be sent to the air supply outlet 31 along the air supply channel 3. The hot air is sent into the quilt interior from the air supply outlet 31, and the hot air heats the interior of the quilt to raise the temperature inside the quilt;

[0058] In the second embodiment, when the return air switch 42 opens the return air channel 4, the return air channel 4 is communicated with the internal circulation air inlet 41. And since the return air channel 4 is communicated with the blower installation cavity 2, after the blower 22 is started, the air in the quilt, or the hot air that is drawn in from the external circulation air inlet 21, heated and then sent to the air supply outlet 31 and discharged into the quilt will be drawn into the return air channel 4 from the internal circulation air inlet 41 again, then is drawn into the blower installation cavity 2 through the return air channel 4, and is sent into the air supply channel 3 by the blower 22, and is sent into the quilt interior from the air supply outlet 31 again after being heated by the heating element 6, forming a warm quilt method of circulating air extraction and supply;

[0059] Furthermore, in the second embodiment, after the return air switch 42 opens the return air channel 4, the opening degree of the return air channel 4 can also be adjusted to adjust the air intake amount entering the return air channel 4 from the internal circulation air inlet 41;

[0060] In the third embodiment, after the return air switch 42 closes the return air channel 4, the return air channel 4 is no longer communicated with the internal circulation air inlet 41, and the hot air in the quilt will not be able to enter the return air channel 4 from the internal circulation air inlet 41, that is, at this time, only the air intake and outlet mode of the quilt warming operation described in the first embodiment can be performed.

[0061] This technical solution provides two different ways of warming the quilt. One is the external circulation way of warming the quilt. The external air is extracted by the blower 22, heated and then sent into the quilt to warm the quilt, so as to achieve the effect of quickly heating and raising the temperature of the quilt. The other is to turn on the return air switch 42 and adopt the internal circulation return air heating method on the basis of the external circulation way of warming the quilt. The hot air sent into the quilt is re-extracted, reheated and then sent into the quilt. On the basis of the conventional way of warming the quilt, the hot air in the quilt is recycled to avoid the waste of the hot air sent into the quilt. And because the hot air in the quilt is circulated and heated and sent out, the temperature of the air sent into the quilt can be quickly raised, so as to achieve the effect of quickly heating and warming the quilt and rapidly raising the temperature of the quilt. At the same time, the air heat energy in the quilt is recycled to save the resources for warming the quilt.

[0062] It should be noted that the heating body 6 in this embodiment can be understood as a heating component configured with heating fins. Multiple groups of heating fins are distributed at intervals so that the air drawn into the air outlet channel can pass through the intervals and be sent out from the air outlet 31. When the drawn air passes through the intervals between the heating fins, heat transfer is carried out by the heating fins to form hot air.

[0063] Preferably, as Figure 4 shown, the return air switch 42 includes a rotating plate 421, a rotating shaft 422, a knob 423 and a mounting vertical plate 424;

[0064] The mounting vertical plate 424 is erected on the side of the return air channel 4 and is arranged opposite to the housing 1. The rotating shaft 422 penetrates through the housing 1 at an angle perpendicular to the return air direction and is movably installed on the mounting vertical plate 424;

[0065] The rotating plate 421 is installed on the shaft body of the rotating shaft 422, and the knob 423 is installed at one end of the rotating shaft 422 exposed outside the housing 1;

[0066] Rotate the knob 423 to make the rotating plate 421 rotate around the rotating shaft 422, so as to adjust the distance between the rotating plate 421 and the return air channel 4 to open and close the return air channel 4 and adjust the opening degree of the return air channel 4.

[0067] In this embodiment, the return air switch 42 is arranged in the return air passage 4 and is close to the inner circulation air inlet 41. The specific structure of the return air switch 42 includes a rotating plate 421, a rotating shaft 422, a knob 423 and a mounting vertical plate 424. The mounting vertical plate 424 is arranged on the side of the return air passage 4 and is opposite to the housing 1. It should be noted that in this embodiment, one side of the return air passage 4 along the air inlet direction is the housing 1, and the other side is the electric control installation cavity 5. The mounting vertical plate 424 is installed at a position close to the electric control installation cavity 5. In order to better close the return air passage 4, the mounting vertical plate 424 can be arranged to fit the electric control installation cavity 5. The rotating shaft 422 penetrates through the housing 1 constituting the return air passage 4 and is connected to the mounting vertical plate 424. The rotating plate 421 is installed on the rotating shaft 422. It can be understood that the rotating shaft 422 passes through the plate body of the rotating plate 421, and the knob 423 is installed at one end of the rotating shaft 422 exposed outside the housing 1. By rotating the knob 423, the rotating shaft 422 rotates itself, thereby driving the rotating plate 421 to rotate in the return air passage 4. The specific opening and closing method of the return air passage 4 and the process of adjusting the opening degree are as follows:

[0068] When the return air switch 42 closes the return air passage 4, the rotating plate 421 is perpendicular to the bottom of the return air passage 4, that is, the plate body of the rotating plate 421 is perpendicular to the axis where the air inlet direction of the return air passage 4 is located. In this way, the rotating plate 421 can seal the cavity of the return air passage 4, so that the return air passage 4 and the inner circulation air inlet 41 cannot communicate. When the return air switch 42 opens the return air passage 4, a gap is formed between the bottom of the plate body of the rotating plate 421 and the bottom of the return air passage 4. At this time, the return air passage 4 communicates with the inner circulation air inlet 41 through the gap. The hot air in the quilt can enter the return air passage 4 through the inner circulation air inlet 41 and the gap, and then re-enter the air supply passage 3 through the fan installation cavity 2, and then be sent back into the quilt interior again after heating; by rotating the rotating shaft 422 to adjust the size of the gap between the bottom of the plate body of the rotating plate 421 and the bottom of the return air passage 4, the air volume entering the return air passage 4 can be increased or decreased. When the plate body of the rotating plate 421 is parallel to the axis where the air inlet direction of the return air passage 4 is located, the air volume entering the return air passage 4 is the largest at this time.

[0069] More preferably, in this technical solution, the return air switch 42 is used to control the connection between the return air passage 4 and the inner circulation air inlet 41, so as to control the opening and closing of the inner circulation warm quilt mode, and further control the temperature in the quilt; by adjusting the opening degree of the return air passage 4 to control the return air volume, so as to realize the adjustment of the heating efficiency of the warm quilt temperature.

[0070] Preferably, as Figures 3 to 5As shown, the air inlet end of the air supply channel 3 is communicated with the air outlet end of the fan installation cavity 2, and the air outlet end of the air supply channel 3 is provided with the air supply opening 31;

[0071] The air inlet end of the return air channel 4 is provided with the internal circulation air inlet 41, and the air outlet end of the return air channel 4 is communicated with the air inlet end of the fan installation cavity 2;

[0072] The air inlet end of the fan installation cavity 2 is provided with the external circulation air inlet 21;

[0073] When performing the warm quilt operation, the external circulation air inlet 21 is placed outside the quilt, and the air supply opening 31 and the internal circulation air inlet 41 are placed inside the quilt.

[0074] In this embodiment, when performing the warm quilt operation, the air inlet end of the fan installation cavity 2 can be understood as being exposed outside the quilt and is provided with the external circulation air inlet 21 for sucking external air into the fan installation cavity 2. The air outlet end of the fan installation cavity 2 is connected to the air inlet end of the air supply channel 3. The air inlet end of the air supply channel 3 can be understood as being close to the side of the fan installation cavity 2. The fan 22 sucks the external air and then sends it into the air supply channel 3 through the fan installation cavity 2, and then it is heated by the heating element 6 installed in the air supply channel 3 and sent into the quilt interior from the air supply opening 31. Therefore, the air outlet end of the air supply channel 3 can be understood as being placed inside the quilt. At the same time, since the hot air in the quilt needs to be recovered and drawn back into the return air channel 4, sent into the fan installation cavity 2 through the return air channel 4, and then sent into the air supply channel 3 by the fan installation cavity 2 for reheating and then sent into the quilt interior again, the internal circulation air inlet 41 of the return air channel 4 can be understood as being placed inside the quilt;

[0075] Furthermore, since the hot air in the quilt is sent to the fan installation cavity 2 after being drawn back from the return air channel 4, and at the same time the fan installation cavity 2 also sucks external air in from the external circulation air inlet 21, the drawn-back hot air in the quilt and the external air both need to be sent into the air supply channel 3 by the fan installation cavity 2. Therefore, the cold and hot air currents will blend in the fan installation cavity 2. At this time, the drawn-back hot air in the quilt will transfer heat energy to the drawn-in external air, so that the external air will increase a certain temperature before passing through the heating element 6. This method can make the external air increase in temperature faster when passing through the heating element 6 and can more quickly increase the temperature in the quilt after being sent into the quilt interior.

[0076] Preferably, as Figure 2 shown, the surface of the housing 1 is recessed inward to form a receiving cavity 71, and a baffle 72 is flip-mounted in the receiving cavity 71. The baffle 72 can be flipped out of the receiving cavity 71 and stand on the surface of the housing 1.

[0077] In this embodiment, the accommodating cavity 71 is located on the side away from the fan installation cavity 2, and a baffle 72 that can be flipped and erected is installed in the accommodating cavity 71. The user can manually flip the baffle 72 and erect it relative to the surface of the housing 1. When warming the quilt, the baffle 72 can resist the edge of the quilt, so that the air outlet 31 and the inner circulation air inlet 41 are placed inside the quilt, and the outer circulation air inlet 21 is outside the quilt, so as to isolate the air outlet 31, the inner circulation air inlet 41 and the outer circulation air inlet 21, and prevent the outer circulation air inlet 21 from extending into the quilt, resulting in the outer circulation air inlet 21 sucking the quilt.

[0078] Furthermore, after the baffle 72 is used, it can be flipped back into the accommodating cavity 71 and flush with the surface of the housing 1, which is convenient for storage.

[0079] Preferably, as Figure 4 and Figure 5 shown, an electric control installation cavity 5 is provided between the air supply channel 3 and the air return channel 4. The electric control installation cavity 5 separates the air supply channel 3 and the air return channel 4 so that the air outlet 31 and the inner circulation air inlet 41 are independent of each other;

[0080] The electric control installation cavity 5 is installed with an electric control board 51.

[0081] In this embodiment, an electric control installation cavity 5 is provided between the air supply channel 3 and the air return channel 4. The electric control installation cavity 5 is used to install the electric control board 51, and at the same time can isolate the air supply channel 3 and the air return channel 4 to prevent the air outlet 31 and the inner circulation air inlet 41 from intersecting, and avoid the situation that the hot air sent into the quilt is sucked back into the air return channel 4 by the inner circulation air inlet 41 after coming out of the air outlet 31 and cannot be sent into the quilt.

[0082] Preferably, as Figure 1 shown, air outlet grilles 81 are provided at both the air outlet 31 and the inner circulation air inlet 41, and the air outlet grilles 81 are provided with blocking nets 82;

[0083] Preferably, the air outlet 31 and the inner circulation air inlet 41 share one air outlet grille 81.

[0084] In this embodiment, since both the air outlet 31 and the inner circulation air inlet 41 need to be placed inside the quilt, for aesthetic reasons, the present application designs the air outlet 31 and the inner circulation air inlet 41 to share one air outlet grille 81, which visually hides the inner circulation air inlet 41, and at the same time can reduce the processing cost during production and make the device appear more compact and beautiful;

[0085] Further, the air outlet grille 81 is provided with a blocking net 82, and the blocking net 82 covers the air supply port 31 and the internal circulation air inlet 41, which can prevent sharp objects from piercing into the air outlet passage through the air supply port 31 to damage the heating element 6 when the heating element 6 is started, and at the same time can prevent impurities such as cotton wadding in the quilt from being sucked into the return air passage through the internal circulation air inlet 41 to damage the blower 22.

[0086] Preferably, temperature sensors 32 are provided at both the top and bottom of the air supply passage 3, and a temperature fuse 33 is arranged at the top of the air supply passage 3, and the temperature fuse 33 is electrically connected to the heating element 6.

[0087] In this embodiment, the temperature sensors 32 are arranged at the top and bottom of the air supply passage 3 to detect the temperature of the hot air sent out by the air supply passage 3, so as to cooperate with functions such as adjusting the rotation speed of the blower 22, heating efficiency, and temperature digital display in intelligent electronic control. At the same time, a temperature fuse 33 is arranged at the top of the air supply passage 3, and the temperature fuse 33 is electrically connected to the heating element 6. When the temperature sensors 32 detect too high a temperature, the temperature fuse 33 can be automatically triggered to disconnect so that the heating element 6 no longer heats, achieving the overheat protection effect of this device.

[0088] Preferably, the housing 1 is provided with a wire receiving hole 53, and the wire receiving hole 53 communicates with the return air passage 4;

[0089] A wire routing groove 52 is provided in the cavity of the electronic control installation cavity 5, and the electronic control installation cavity 5 communicates with the return air passage 4 through the wire routing groove 52.

[0090] In this embodiment, the wire receiving hole 53 is opened on one side of the housing 1 where the return air passage 4 is located. When starting this device, the power cord is connected to the electronic control board 51 in the electronic control installation cavity 5, and is routed out through the wire routing groove 52, passes through the return air passage 4, and then comes out of the wire receiving hole 53 to the outside of the housing 1 for plug-in connection. When this device is used up, the sorted power cord is placed into the return air passage 4 through the wire receiving hole 53 for storage, achieving the effect of convenient storage;

[0091] It should be noted that in addition to the function of facilitating the storage and arrangement of the power cord, the wire receiving hole 53 in this embodiment can also play the role of recovering the hot air in the quilt; specifically, the return air passage 4 communicates with the outside through the wire receiving hole 53. Therefore, when this device is started and used, in addition to the hot air in the quilt being sucked into the return air passage 4 through the internal circulation air inlet 41, the hot air in the quilt can also be sucked into the return air passage 4 through the wire receiving hole 53, further improving the recovery rate of the hot air in the quilt;

[0092] Furthermore, since the fan installation cavity 2 is located behind the return air duct 4, after the hot air in the quilt is drawn in from the internal circulation air inlet 41 and the wire collection hole 53, the return air directions of the two are consistent, both are drawn in from the direction of the fan installation cavity 2. Therefore, there is no need to worry about the hot air in the quilt being drawn in from the internal circulation air inlet 41 and then going out from the wire collection hole 53, causing the problem of return air leakage.

[0093] Preferably, Figure 2 and Figure 6 As shown, it includes a filter 91;

[0094] The wall surface where the edge of the filter screen 91 is located is provided with a card slot 92, and the surface of the filter screen 91 is provided with a protrusion 94;

[0095] A card block 93 adapted to the card slot 92 protrudes from the wall surface of the cavity where the air inlet end of the fan installation cavity 2 is located;

[0096] The card slot 92 and the card block 93 are engaged with each other so that the filter screen 91 can be detachably installed at the cavity opening where the air inlet end of the fan installation cavity 2 is located.

[0097] In the present embodiment, in order to prevent external debris from being sucked into the external circulation air inlet 21 when sucking air, thereby damaging the fan 22, the present application sets a filter screen 91 at the external circulation air inlet 21. At the same time, in order to facilitate the cleaning of the fan 22, the present application designs the filter screen 91 to be a detachable structure. During installation, it is only necessary to place the filter screen 91 into the cavity opening where the air inlet end of the fan installation cavity 2 is located, and then move the protrusion 94 to drive the filter screen 91 to rotate so that the card slot 92 and the card block 93 are inserted into each other to complete the installation, so that the installation of the filter screen 91 is convenient and quick.

[0098] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A quilt warming device, characterized in that: It includes a housing provided with a fan installation cavity, an air supply channel, and an air return channel; The fan installation cavity is installed with a fan and is provided with an external circulation air inlet; The air supply channel is installed with a heating body and is provided with an air supply port; The return air channel is provided with an internal circulation air inlet; The outer circulation air inlet is connected to the air supply channel through the fan installation cavity, and the inner circulation air inlet is connected to the fan installation cavity and the air supply channel in sequence through the return air channel; The return air channel is provided with a return air switch, and the return air switch is used to open and close the return air channel and adjust the opening degree of the return air channel; When performing the quilt warming operation, the fan draws outside air from the external circulation air inlet and / or draws hot air in the quilt from the internal circulation air inlet into the air supply channel, so that the hot air is heated by the heating body and then delivered into the quilt from the air supply port.

2. A quilt warmer according to claim 1, characterized in that: The return air switch comprises a rotating plate, a rotating shaft, a knob and a mounting plate; The mounting plate is vertically arranged on the side of the return air passage and is arranged opposite to the shell, and the rotating shaft penetrates the shell along an angle perpendicular to the return air direction and is movably mounted on the mounting plate; The rotating plate is installed on the shaft body of the rotating shaft, and the knob is installed on one end of the rotating shaft exposed outside the shell; The knob is turned to rotate the rotating plate around the rotating shaft, so as to adjust the distance between the rotating plate and the return air channel to open and close the return air channel and adjust the opening degree of the return air channel.

3. A quilt warmer according to claim 1, characterized in that: The air inlet end of the air supply channel is connected to the air outlet end of the fan installation cavity, and the air outlet end of the air supply channel is provided with the air supply port; The air inlet end of the return air channel is provided with the internal circulation air inlet, and the air outlet end of the return air channel is connected to the air inlet end of the fan installation cavity; The air inlet end of the fan installation cavity is provided with the external circulation air inlet; When performing the quilt warming operation, the external circulation air inlet is placed outside the quilt, and the air supply port and the internal circulation air inlet are placed inside the quilt.

4. A quilt warmer according to claim 1, characterized in that: The surface of the shell is recessed inwardly to form a receiving cavity, and a baffle is installed in the receiving cavity in a flip-over manner. The baffle can be flipped out of the receiving cavity and erected on the surface of the shell.

5. A quilt warmer according to claim 1, characterized in that: An electric control installation cavity is provided between the air supply channel and the return air channel, and the electric control installation cavity separates the air supply channel and the return air channel so that the air supply port and the internal circulation air inlet are independent of each other; The electric control installation cavity is installed with an electric control board.

6. A quilt warmer according to claim 1, characterized in that: The air supply port and the internal circulation air inlet are both provided with an air outlet grille, and the air outlet grille is provided with a blocking net.

7. A quilt warmer according to claim 6, characterized in that: The air supply port and the internal circulation air inlet share the same air outlet grille.

8. The quilt warmer according to claim 1, characterized in that: The top and bottom of the air supply channel are both provided with temperature sensors, and the top of the air supply channel is provided with a temperature fuse, and the temperature fuse is electrically connected to the heating body.

9. A quilt warmer according to claim 5, characterized in that: The housing is provided with a wire receiving hole, and the wire receiving hole is connected to the return air channel; The cavity body of the electric control installation cavity is provided with a wiring groove, and the electric control installation cavity is connected to the return air channel through the wiring groove.

10. The quilt warmer according to claim 3, characterized in that: Including filter; A card slot is provided on the wall surface where the edge of the filter screen is located, and a bump is protruded from the surface of the filter screen; A card block adapted to the card slot protrudes from the wall surface of the cavity opening where the air inlet end of the fan installation cavity is located; The filter screen is detachably mounted on the cavity opening where the air inlet end of the fan installation cavity is located through the card insertion cooperation between the card slot and the card connection block.

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