Air heater and drying system

Abstract

The utility model discloses a hot-air blower and a drying system, the hot-air blower comprises: a casing, a mounting chamber is arranged in the casing, the casing is provided with an air inlet and an air outlet which are communicated with the mounting chamber, and the through-flow area of the air inlet is larger than the through-flow area of the air outlet; the hot air device is installed in the installation chamber, a first air storage space and a second air storage space are formed in the positions, on the two sides of the hot air device, of the installation chamber correspondingly, and the air inlet and the air outlet correspond to the first air storage space and the second air storage space correspondingly; the mounting chamber is provided with a backflow channel beside the hot air device, and the first air storage space communicates with the second air storage space through the backflow channel. The heating power of the hot air device is reduced through the air storage structure, and the purpose of reducing the energy consumption of the hot air blower is achieved on the premise that the drying effect is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a hot air blower and a drying system. Background Art

[0002] Existing hot air blowers generally have an air inlet, an air outlet and a hot air device. The hot air device includes a motor, a fan blade and a heating element. It can guide the flow of air through the rotation of the fan blade, so as to guide the air from the air inlet to the air outlet. During this process, the heating element heats the flowing air to generate hot air, and the hot air is sent to a dryer from the air outlet for drying.

[0003] Since the air inlet volume and the air outlet volume of the existing hot air blower are both kept consistent and the air inlet and air outlet are synchronous, there are relatively high requirements for the power of the heating element. The cold air must be heated to a specified temperature by the heating element in one flow, otherwise the outlet air temperature will not meet the standard. Since the greater the power of the heating element, the more energy consumption and the higher the manufacturing cost, it is urgent to develop a hot air blower with low energy consumption. Summary of the Utility Model

[0004] The utility model aims to provide a hot air blower with low energy consumption.

[0005] The hot air blower according to the first aspect embodiment of the utility model includes:

[0006] A casing, inside which there is an installation chamber. The casing is provided with an air inlet and an air outlet that communicate with the installation chamber, and the flow area of the air inlet is larger than that of the air outlet;

[0007] A hot air device, which is installed in the installation chamber. The installation chamber forms a first air storage space and a second air storage space on both sides of the hot air device respectively. The air inlet and the air outlet respectively correspond to the first air storage space and the second air storage space. The installation chamber is provided with a return channel beside the hot air device, and the first air storage space and the second air storage space are communicated through the return channel.

[0008] The hot air blower according to the embodiments of the present utility model has at least the following beneficial effects: Since air can be compressed, when the flow area of the air inlet is larger than that of the air outlet, under the blowing drive of the hot air device, the air intake volume of the air inlet is greater than the air output volume of the air outlet. The excess air will stay in the installation chamber and mainly concentrate in the second air storage space. At this time, the air pressure in the second air storage space is greater than that in the first air storage space, so as to promote the flow of the internal air current. The increase in air pressure will increase the air output volume of the air outlet, and finally achieve the air intake and output balance between the air inlet and the air outlet. During this process, the air staying in the second air storage space is fully heated by the hot air device. At the same time, a small part of the hot air enters the first air storage space through the return channel under the influence of the internal air current and is mixed with the cold air to increase the initial temperature level of the air. Compared with the prior art, the present utility model reduces the heating power of the hot air device through the air storage structure, and achieves the purpose of reducing the energy consumption of the hot air blower without affecting the drying effect.

[0009] According to some embodiments of the present utility model, since the second air storage space is the main air storage area, the volume of the second air storage space is larger than that of the first air storage space, so as to store more hot air.

[0010] According to some embodiments of the present utility model, the air inlet and the air outlet are arranged in a staggered manner to artificially set an air outlet branch path, so that the hot air can fill the installation chamber more quickly before reaching the air intake and output balance state.

[0011] According to some embodiments of the present utility model, specifically, the hot air device includes a power source, a fan blade and a heat source. The power source drives the fan blade to rotate. The fan blade forms an air current from the air inlet to the air outlet through rotation, and the heat source is located on the air current path.

[0012] According to some embodiments of the present utility model, the heat source is located between the fan blade and the air outlet, and the heat source covers the fan blade. Through the above setting, the heat source can be closer to the second air storage space and heat the blowing air current in all directions.

[0013] According to some embodiments of the present utility model, in order to further reduce the energy consumption of the hot air blower, the heat source is a heat exchanger of a heat pump. The heat pump includes a compressor, an evaporator and the heat exchanger. The compressor, the heat exchanger and the evaporator are connected through pipelines, and the evaporator is installed outside the installation chamber.

[0014] According to some embodiments of the present utility model, in order to save space, the compressor is installed in the first air storage space, and the evaporator is installed above the installation chamber.

[0015] According to some embodiments of the present utility model, the return air channel is located above the hot air device. In order to save costs, the volume of the hot air device is not set to be very large. In order to satisfy the fixed connection between the hot air device and the installation chamber, three sides of the hot air device need to be fixedly connected to the installation chamber. Therefore, there is a space reserved above the hot air device at this time, which is used as the return air channel and is convenient for overhauling the hot air device.

[0016] The drying system according to the second aspect embodiment of the present utility model includes a dryer and the above-mentioned hot air blower, and the dryer is provided with a connection pipe docked to the air outlet.

[0017] The drying system according to the embodiment of the present utility model has at least the following beneficial effects: Since the drying system uses the hot air blower, it can achieve the drying function with lower power consumption, thus striving for higher economic benefits for users.

[0018] According to some embodiments of the present utility model, a blower is provided on the connection pipe. Since the hot air blower uses a heat pump as the heat source and the heating power of the heat pump tends to be stable, even if the air blowing power of the hot air device is increased, it is difficult for the heating power of the heat pump to keep up with the air blowing power of the hot air device. Therefore, the hot air blower generally works at a certain power. However, when the user needs to increase the air volume, the requirement of increasing the air volume within a certain period of time can be met by setting the blower.

[0019] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0020] The above-mentioned and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0021] Figure 1 is a schematic structural diagram of the hot air blower according to the embodiment of the present utility model;

[0022] Figure 2 is a schematic diagram of the hot air blower according to the embodiment of the present utility model in the air inlet direction;

[0023] Figure 3 is a schematic diagram of the hot air blower according to the embodiment of the present utility model in the air outlet direction.

[0024] In the accompanying drawings: 100 - housing, 200 - hot air device, 300 - installation chamber, 110 - air inlet, 120 - air outlet, 310 - first air storage space, 320 - second air storage space, 330 - return channel, 400 - compressor, 500 - evaporator, 600 - heat exchanger. Detailed implementation manners

[0025] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0026] In the description of the present utility model, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0027] In the description of the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0028] In the description of the present utility model, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0029] Such as Figures 1 to 3As shown in the figure, the hot air blower according to the first aspect embodiment of the present utility model includes a housing 100 and a hot air device 200. The housing 100 is a metal component, and a metal with relatively poor thermal conductivity, such as tin alloy, can be used, or a heat insulation coating can be applied on the outer surface of the housing 100 to reduce the heat exchange rate between the housing 100 and the external environment. An installation chamber 300 is provided inside the housing 100. The volume of the installation chamber 300 is approximately between 0.7 cubic meters and 2 cubic meters. The hot air device 200 is installed in the installation chamber 300. An air inlet 110 and an air outlet 120 are respectively provided on a pair of side surfaces of the housing 100. The air inlet 110 and the air outlet 120 are both communicated with the installation chamber 300. The flow area of the air inlet 110 is larger than the flow area of the air outlet 120, and the air inlet 110 and the air outlet 120 are arranged in a staggered manner to artificially create an air outlet branch path.

[0030] Specifically, the hot air device 200 is located between the air inlet 110 and the air outlet 120. The hot air device 200 includes a power source, a fan blade, and a heat source. The power source can be selected as a motor, and the heat source can be selected as an electric heating wire or a heat exchanger 600 of a heat pump. The motor drives the fan blade to rotate. The fan blade forms an air flow from the air inlet 110 to the air outlet 120 through rotation. The heat source is located on the air flow path to heat the air flowing through.

[0031] In addition, the hot air device 200 is spaced apart from the air inlet 110 and the air outlet 120 respectively, so that a first air storage space 310 and a second air storage space 320 are respectively formed on both sides of the hot air device 200 in the installation chamber 300. At this time, the air inlet 110 and the air outlet 120 respectively correspond to the first air storage space 310 and the second air storage space 320. In order to communicate the first air storage space 310 and the second air storage space 320, a return channel 330 is provided beside the hot air device 200 in the installation chamber 300. The first air storage space 310 and the second air storage space 320 are communicated through the return channel 330.

[0032] Furthermore, the heat source is located between the fan blade and the air outlet 120, and the heat source covers the fan blade, so that the heat source can be closer to the second air storage space 320 and heat the blowing air flow in all directions.

[0033] With the above structure, since air can be compressed, when the flow area of the air inlet 110 is larger than that of the air outlet 120, under the blowing drive of the hot air device 200, the air intake volume of the air inlet 110 is larger than the air outlet volume of the air outlet 120. The excess air will stay in the installation chamber 300 and mainly concentrate in the second air storage space 320. At this time, the air pressure in the second air storage space 320 is greater than that in the first air storage space 310 to promote the flow of internal air. The increase in air pressure will increase the air outlet volume of the air outlet 120, and finally achieve the air intake and outlet balance between the air inlet 110 and the air outlet 120.

[0034] In the above process, the air staying in the second air storage space 320 is fully heated by the hot air device 200. At the same time, a small part of the hot air enters the first air storage space 310 through the return channel 330 under the influence of the internal air flow and mixes with the cold air to increase the initial temperature level of the air. Since the hot air output by the hot air blower comes from the air in the second air storage space 320, and the air in the second air storage space 320 can be fully heated by the hot air device 200, the hot air blower can maintain a certain air outlet temperature. Compared with the prior art, the utility model reduces the heating power of the hot air device 200 through the air storage structure, and achieves the purpose of reducing the energy consumption of the hot air blower without affecting the drying effect.

[0035] In some embodiments of the present utility model, in view of the above beneficial effects, the heat source can be selected as a product with low energy consumption. In this embodiment, the heat source can be selected as the heat exchanger 600 of the heat pump. The heat pump mainly includes a compressor 400, an evaporator 500 and the heat exchanger 600. The compressor 400, the heat exchanger 600 and the evaporator 500 are connected by pipelines. Correspondingly, the machine shell 100 is arranged in layers, the bottom layer is the installation chamber 300, and the evaporator 500 is installed above the installation chamber 300 of the machine shell 100. The evaporator 500 can use the low-grade heat energy of the external environment to provide heat for the heat exchanger 600. In order to save space, the compressor 400 is installed in the first air storage space 310. Since the compressor 400 generates heat during operation, setting it in the first air storage space 310 can make full use of the waste heat of the compressor 400 to improve the heat dissipation effect of the compressor 400.

[0036] During operation, the compressor 400 in the heat pump compresses the normal-temperature and low-pressure gaseous refrigerant entering from the refrigerant inlet into a high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure gaseous refrigerant flows out from the refrigerant outlet. When the high-temperature and high-pressure gaseous refrigerant flows through the heat exchanger 600, it liquefies and releases heat to become a normal-temperature and high-pressure liquid refrigerant. The heat exchanger 600 uses the heat generated when the refrigerant liquefies and releases heat to heat the air. After the normal-temperature and high-pressure liquid refrigerant passes through the liquid storage tank and the filter, it starts to enter the expansion valve. Since the expansion valve can change the throttling section or the throttling length to control the flow rate of the refrigerant, the normal-temperature and high-pressure liquid refrigerant will become a low-temperature and low-pressure liquid refrigerant after flowing through the expansion valve. The low-temperature and low-pressure liquid refrigerant absorbs the low-grade heat of the ambient air and evaporates when flowing through the evaporator 500. After the action of the evaporator 500, the low-temperature and low-pressure liquid refrigerant will become a normal-temperature and low-pressure gaseous refrigerant. The water vapor in the air condenses into water droplets on the water collecting plate and flows into the water collecting box. A small part of the liquid refrigerant that is not fully vaporized will be recovered by the gas-liquid separator into the liquid storage tank. The normal-temperature and low-pressure gaseous refrigerant then enters the compressor 400 from the refrigerant inlet and repeats the above process again.

[0037] As Figure 1 shown, in some embodiments of the present invention, since the second air storage space 320 is the main air storage area, the volume of the second air storage space 320 is larger than the volume of the first air storage space 310 to store more hot air. And since the air inlet 110 and the air outlet 120 are arranged in a staggered manner, before reaching the air inlet and outlet balance state, the hot air can fill the installation chamber 300 more quickly to reduce the preheating time of the hot air blower.

[0038] In some embodiments of the present invention, in order to save costs, the volume of the hot air device 200 is not set to be very large. In order to meet the fixed connection between the hot air device 200 and the installation chamber 300, three sides of the hot air device 200 need to be fixedly connected to the installation chamber 300. Therefore, there is a space reserved above the hot air device 200, which is used as the return channel 330. In addition to enabling the intercommunication between the first air storage space 310 and the second air storage space 320, the return channel 330 also provides convenience for the maintenance of the hot air device 200 to facilitate the information and material exchange between the staff on both sides.

[0039] The drying system according to the second aspect embodiment of the present utility model includes a hot air blower according to the first aspect embodiment of the present utility model above, and further includes a dryer (not shown in the drawings). The dryer is provided with a connecting pipe (not shown in the drawings) docked to the air outlet 120. The hot air blower transports hot air to the dryer through the connecting pipe to meet the continuous drying of items. It can be understood that the present utility model does not limit the specific use of the drying system. As long as the hot air blower is adopted, regardless of the type of the dryer, it belongs to the protection scope of the present utility model.

[0040] In some embodiments of the present utility model, since the hot air blower uses a heat pump as a heat source and the heating power of the heat pump tends to be stable, even if the blowing power of the hot air device 200 is increased, it is difficult for the heating power of the heat pump to keep up with the blowing power of the hot air device 200. Therefore, the hot air blower generally works at a certain power. However, when the user needs to increase the air volume, a blower can be provided on the connecting pipe to meet the requirement of increasing the air volume within a certain period of time to meet the general rule of the drying step - first quickly dry the moisture on the surface of the item through a large air volume, and then dry the moisture inside the item through continuous hot air.

[0041] Since the drying system adopts the hot air blower, it can achieve the drying function with lower power consumption and strive for higher economic benefits for customers.

[0042] The embodiments of the present utility model have been described in detail above with reference to the drawings. However, the present utility model is not limited to the above embodiments. Various changes can be made without departing from the gist of the present utility model within the knowledge scope of those of ordinary skill in the art.

Claims

1. A hot air blower, characterized in that: include: A casing (100) having an installation chamber (300) disposed therein, the casing (100) being provided with an air inlet (110) and an air outlet (120) connected to the installation chamber (300), the flow area of ​​the air inlet (110) being greater than the flow area of ​​the air outlet (120); A hot air device (200) is installed in the installation room (300), wherein the installation room (300) forms a first air storage space (310) and a second air storage space (320) on both sides of the hot air device (200), respectively, the air inlet (110) and the air outlet (120) correspond to the first air storage space (310) and the second air storage space (320), respectively, and the installation room (300) is provided with a return channel (330) beside the hot air device (200), and the first air storage space (310) and the second air storage space (320) are connected through the return channel (330).

2. The hot air blower according to claim 1, characterized in that: The volume of the second air storage space (320) is greater than the volume of the first air storage space (310).

3. The hot air blower according to claim 1, characterized in that: The air inlet (110) and the air outlet (120) are arranged in a staggered manner.

4. The hot air blower according to claim 1, characterized in that: The hot air device (200) comprises a power source, fan blades and a heat source, the power source drives the fan blades to rotate, and the fan blades form an airflow from the air inlet (110) to the air outlet (120) through rotation, and the heat source is located on the airflow path.

5. The hot air blower according to claim 4, characterized in that: The heat source is located between the fan blade and the air outlet (120), and the heat source covers the fan blade.

6. The hot air blower according to claim 4 or 5, characterized in that: The heat source is a heat exchanger (600) of a heat pump, and the heat pump comprises a compressor (400), an evaporator (500) and the heat exchanger (600). The compressor (400), the heat exchanger (600) and the evaporator (500) are connected via pipelines, and the evaporator (500) is installed outside the installation room (300).

7. The hot air blower according to claim 6, characterized in that: The compressor (400) is installed in the first air storage space (310), and the evaporator (500) is installed above the installation room (300).

8. The hot air blower according to claim 1, characterized in that: The return channel (330) is located above the hot air device (200).

9. Drying system, characterized in that, It comprises the hot air blower as claimed in any one of claims 1 to 8, and further comprises: a dryer, wherein the dryer is provided with a connecting pipe connected to the air outlet (120).

10. The drying system according to claim 9, characterized in that: A blower is arranged on the connecting pipeline.

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