Open type integrated drying unit with heat recovery function

Abstract

The utility model relates to an open type integrated drying unit with heat recovery, which comprises a shell, a condensation cavity, an evaporation cavity, an air return cavity and a moisture removal channel are separated in the shell, a condenser and an internal circulation fan are arranged in the condensation cavity, an evaporator and an external circulation fan are arranged in the evaporation cavity, the air return cavity is communicated with the condensation cavity, and the moisture removal channel is communicated with the evaporation cavity. An air return opening and a fresh air opening are formed in the shell corresponding to the air return cavity, the inlet end of the moisture removal channel is communicated with the curing barn, and the outlet end of the moisture removal channel is selectively communicated with or disconnected from the evaporation cavity through an opening and closing structure. Through reasonable structural layout, fresh air, moisture removal and heat recovery functions are all integrated in the unit, and humid and hot air can be discharged according to a set route, so that the risk of condensation of condensate water around the unit is reduced, the temperature and humidity in a curing barn can be better and faster controlled, and the temperature and humidity control efficiency is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of heat pump drying technology, especially to an open type integrated drying unit with heat recovery. BACKGROUND

[0002] In the tobacco drying industry, heat pump drying units are commonly used to heat and raise the temperature of curing barns to complete drying operations. There are two structural forms of drying units. One is a split machine, but the installation of the split machine is complex, and the engineering quality is difficult to control. The other is an integrated machine, which is convenient to install and debug.

[0003] Currently, the integrated heat pump drying unit includes an evaporation cabin and a condensation cabin. The evaporation cabin absorbs heat from the outside, and the condensation cabin releases heat. The evaporation cabin and the condensation cabin are not connected, and the heat released by the condensation cabin enters the drying chamber for drying operations. Among them, the evaporation cabin is placed outside the drying chamber, and the condensation cabin is placed inside the drying chamber,

[0004] The existing curing barn sets the exhaust window on the curing barn. After the humid hot air is exhausted, it is dispersed around the drying unit. Not only is the heat in the humid hot air completely lost, but the recovery rate is low. Moreover, after the humid hot air is dispersed, condensate water is easily produced around the drying unit, which seriously affects the safe operation of the drying unit. SUMMARY

[0005] The technical problem solved by the utility model is to provide an open type integrated drying unit with heat recovery, which can effectively recover the heat of humid hot air and make the air after exhaust follow a set route, reducing the risk of condensate water condensation.

[0006] To solve the above technical problems, the basic idea of the technical solution of the utility model is as follows:

[0007] An open type integrated drying unit with heat recovery includes a shell, a condensation cavity, an evaporation cavity, a return air cavity, and an exhaust channel are separated in the shell. A condenser and an internal circulation fan are installed in the condensation cavity. An evaporator and an external circulation fan are installed in the evaporation cavity. The return air cavity is connected with the condensation cavity. A return air inlet and a fresh air inlet are arranged on the shell corresponding to the return air cavity. The inlet end of the exhaust channel is connected with the curing barn. The outlet end of the exhaust channel is selectively connected or disconnected with the evaporation cavity through an opening and closing structure.

[0008] Further, the opening and closing structure arranged at the outlet end of the exhaust channel is an exhaust louver or an exhaust air valve.

[0009] Further, the exhaust channel is embedded in the return air cavity, and the exhaust channel is isolated by a partition plate installed in the return air cavity.

[0010] Further, the exhaust channel is arranged at the bottom of the return air cavity, and is surrounded by a U-shaped partition plate and a bottom plate of the shell.

[0011] Further, the inlet of the exhaust channel is embedded in a central area transversely to the return air inlet.

[0012] Further, the return air cavity is arranged below the condensation cavity, the evaporation cavity is arranged at one side of the return air cavity, the condenser is horizontally arranged in the condensation cavity, the inner circulation fan is arranged above the condenser, the inner circulation exhaust port is arranged on the top plate of the shell corresponding to the inner circulation fan, and the outer circulation exhaust port is arranged on the side plate of the shell corresponding to the outer circulation fan.

[0013] Further, an electric control cavity is arranged above the evaporation cavity at one side of the condensation cavity, an electric control box is arranged in the electric control cavity, and a control screen is arranged on the front panel of the shell.

[0014] Further, a compressor is arranged in the evaporation cavity, the compressor is arranged at the air inlet side of the evaporator, and the compressor, the evaporator and the outer circulation fan are arranged transversely in the evaporation cavity.

[0015] Further, an outer circulation air inlet is arranged on the bottom plate of the evaporation cavity shell.

[0016] Further, the fresh air inlet is arranged above the return air inlet, the fresh air inlet and the return air inlet are arranged on the side plate of the shell, and a fresh air valve is arranged at the fresh air inlet.

[0017] Compared with the prior art, the open type integrated dryer set with heat recovery has the following advantages.

[0018] (1) The fresh air, the exhaust, and the heat recovery function are all integrated into the set according to the reasonable structure layout of the utility model, and the humid hot air can be discharged according to the set route, so that the risk of condensation of condensate around the set is reduced, the temperature and humidity in the curing room can be better and faster controlled, and the temperature and humidity control efficiency is further improved.

[0019] (2) The set is convenient to install, does not need to install an exhaust window on the curing room, the humid hot air discharged in the curing room can realize heat recovery in the set, energy is fully utilized, the energy efficiency ratio of the set is higher, the temperature and humidity control efficiency is improved, and the control precision is enhanced.

[0020] (3) The return air and the fresh air share one fan, and the evaporation and the exhaust also share one fan, so that the internal structure layout of the device is compact and reasonable, and the existing set structure can be further transformed.

[0021] (4) The utility model discloses a moisture control by using the opening and closing structure of the outlet end of the moisture removal channel, reduces the use of the dehumidification evaporator and the dehumidification fan in the existing drying unit, makes the structure of the unit more simple, and also reduces the cost of the unit.

[0022] The specific embodiments of the utility model will be described in further detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings are part of the utility model and are used to provide further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model, but do not constitute improper limitation on the utility model. Obviously, the drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor on the premise of the drawings.

[0024] In the drawings:

[0025] Figure 1 is the appearance structure diagram of the utility model unit;

[0026] Figure 2 is the internal structure schematic diagram of the utility model unit;

[0027] Figure 3 is the temperature rising mode wind field schematic diagram of the utility model unit;

[0028] Figure 4 is the moisture removal mode wind field schematic of the utility model unit.

[0029] In the drawings:

[0030] Shell 1, top plate 1a, side plate 1b, bottom plate 1c, side plate 1d, condensation cavity 2, evaporation cavity 3, return air cavity 4, moisture removal channel 5, inner circulation fan 6, condenser 7, outer circulation fan 8, evaporator 9, return air inlet 10, fresh air inlet 11, inner circulation exhaust inlet 12, outer circulation exhaust inlet 13, electric heater 14, fresh air valve 15, compressor 16, gas-liquid separator 17, outer circulation air inlet 18, first partition 19, second partition 20, vertical plate 201, inclined plate 202, U-shaped partition 21, electric control cavity 22, control screen 23.

[0031] It should be noted that the drawings and the written description are not intended to limit the scope of the concept of the utility model in any way, but to illustrate the concept of the utility model to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments will be clearly and completely described below in combination with the drawings in the embodiments of the utility model, the following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0033] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" and the like is the orientation or position relation based on the orientation or position relation shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0034] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] As shown in Figure 1 and Figure 2 The embodiment provides an open type integrated drying machine set with heat recovery, which comprises a shell 1, a condensation cavity 2, an evaporation cavity 3, a return air cavity 4 and a dehumidification channel 5 are separated in the shell 1, and the condensation cavity 2, the evaporation cavity 3, the return air cavity 4 and the dehumidification channel 5 are all separated by a partition plate. An inner circulating fan 6 and a condenser 7 are installed in the condensation cavity 2, an outer circulating fan 8 and an evaporator 9 are installed in the evaporation cavity 3, and the return air cavity 4 is communicated with the condensation cavity 2. Preferably, the inner circulating fan 6 and the outer circulating fan 8 are both centrifugal fans.

[0036] In the embodiment, preferably, the return air cavity 4 is arranged below the condensation cavity 2, and the evaporation cavity 3 is arranged on one side of the return air cavity 4. The condenser 7 is horizontally arranged in the condensation cavity 2, and the inner circulating fan 6 is arranged above the condenser 7. The return air opening 10 and the fresh air opening 11 are arranged on the shell 1 corresponding to the return air cavity 3, the inner circulating air exhaust opening 12 is arranged on the top plate 1a of the shell 1 corresponding to the inner circulating fan 6, and the outer circulating air exhaust opening 13 is arranged on the side plate 1b of the shell 1 corresponding to the outer circulating fan 8. The layout structure is beneficial to the compactness of the overall structure inside the drying machine set.

[0037] In this embodiment, it is further preferred that an electric heater 14 is installed above the condenser 7 and parallel to the condenser 7, and the electric heater 14 is started to provide high-temperature air for the drying room when the temperature of the condensed air cannot meet the drying requirements of the drying room.

[0038] In this embodiment, it is further preferred that the fresh air outlet 11 is arranged above the return air inlet 10, and the fresh air outlet 11 and the return air inlet 10 are arranged on the side plate 1d of the shell 1, and a fresh air valve 15 is arranged at the fresh air outlet 11, and the fresh air amount can be adjusted by controlling the opening degree of the fresh air valve 15.

[0039] In this embodiment, it is further preferred that the compressor 16 is also installed in the evaporation cavity 3, and the gas-liquid separator 17 connected to the suction end of the compressor 16 is also installed in the evaporation cavity 3. It is further preferred that the compressor 16 and the gas-liquid separator 17 are arranged on the air inlet side of the evaporator 9, close to the outlet end of the dehumidification channel 5. The evaporator 9 is vertically installed in the evaporation cavity 3, the compressor 16, the evaporator 9 and the outer circulation air fan 8 are arranged transversely in the evaporation cavity 3, and the gas-liquid separator 17 can be installed beside the compressor 16 as needed. The compressor 16, the gas-liquid separator 17 and the evaporator 9 are all fixed on the bottom plate 1c of the shell 1. The outer circulation air inlet 18 is arranged on the bottom plate 1c of the shell 1 corresponding to the evaporation cavity 3, and is specifically arranged on the bottom plate 1c below the compressor 16. In this way, not only can the outdoor air entering through the outer circulation air inlet 18 cool the compressor 16, which is beneficial to prolong the service life of the compressor 16, but also it is beneficial to further make the overall structure of the drying unit more compact. In order to increase the air inlet amount of the outer circulation air inlet 18, it is more preferred that a plurality of outer circulation air inlets 18 are formed on the bottom plate 1c of the shell 1.

[0040] In this embodiment, the first partition plate 19 separating the return air cavity 4 and the condensation cavity 2 is horizontally installed in the shell 1 and is fixedly connected to the framework of the shell 1 by bolts, and an opening is formed on the first partition plate 19 corresponding to the condenser 7, and the return air cavity 4 and the condensation cavity 2 are communicated through the opening. The second partition plate 20 separating the return air cavity 4 and the evaporation cavity 3 is composed of a vertical plate 201 at the bottom and an inclined plate 202 at the top, and the top of the inclined plate 202 is connected to the first partition plate 19, and a space for installing the compressor 16 is formed below the inclined plate 202.

[0041] The exhaust channel 5 can be installed alone on one side of the return air cavity 4, and only needs to be able to communicate the drying room and the evaporating cavity 3. In the present application, it is further preferred that the exhaust channel 5 is embedded in the inside of the return air cavity 4, the inlet end of the exhaust channel 5 communicates with the drying room, and the outlet end of the exhaust channel 5 is selectively communicated or disconnected with the evaporating cavity 3 through an opening and closing structure. In this way, it is beneficial to make the structure layout in the casing 1 more compact, and at the same time, using one outdoor circulating fan 8 can realize the double functions of the hot and humid air in the drying room being drawn into the exhaust channel 5 to exchange heat with the evaporator 9 to realize heat recovery and the outdoor air entering the evaporating cavity 3 to exchange heat with the evaporator 9, which is beneficial to simplify the structure of the device. In addition, through the setting of the exhaust channel 5, the hot and humid air exchanges heat with the evaporator 9, which not only effectively realizes the heat recovery of the hot and humid air, but also enables the air after being dehumidified to be discharged according to the set route, reducing the risk of condensate condensation around the unit.

[0042] It is further preferred that the opening and closing structure provided at the outlet end of the exhaust channel 5 connected with the evaporating cavity 3 is an exhaust louver or an exhaust air valve (not shown in the figure). Controlling the exhaust louver or the exhaust air valve can control the communication or disconnection between the exhaust channel 5 and the evaporating cavity 3, and can also control the amount of air entering the exhaust channel 5, which is beneficial to accurately control the dehumidification amount of the drying room.

[0043] In the present embodiment, the exhaust channel 5 is arranged at the bottom of the return air cavity 4, the exhaust channel 5 is surrounded by the U-shaped partition plate 21 and the bottom plate 1c of the casing 1, the cross section of the exhaust channel 5 is preferably square, the outlet end of the exhaust channel 5 is connected to the vertical plate 201 separating the return air cavity 4 and the evaporating cavity 3, and the height of the exhaust channel 5 is the same as the height of the vertical plate 201 of the second partition plate 20. An opening is formed on the vertical plate 201, and an exhaust louver or an exhaust air valve is installed at the opening. In this way, it is beneficial to simplify the structure of the exhaust channel 5, facilitate the installation of the exhaust channel 5, and more beneficial to the modification on the structure of the existing drying unit.

[0044] In the present embodiment, it is further preferred that the inlet of the exhaust channel 5 is embedded in the central area of the return air inlet 10 in the transverse direction, and when the hot and humid air in the drying room passes through the return air inlet 10, part of the hot and humid air directly enters the return air cavity 4 from the return air inlet 10, mixes with the fresh air entering through the fresh air inlet 11 upward, and part of the hot and humid air enters the exhaust channel 5 through the inlet of the exhaust channel 5, then flows into the evaporating cavity 3 through the exhaust channel 5, and exchanges heat with the evaporator 9. The hot and humid air exchanged with the evaporator 9 is recovered for heat, and the low-temperature air after heat exchange is discharged through the outdoor circulating air outlet 13.

[0045] In this embodiment, when the dehumidification passage 5 is opened, the fresh air valve 15 is also opened, and due to the input of fresh air, the air in the curing barn becomes positive pressure. When the air reaches the return air outlet 10, due to the opening of the dehumidification passage 5, part of the air in the curing barn enters the dehumidification passage 5 to exchange heat with the evaporator 9 to realize heat recovery. Thus, through reasonable air duct arrangement, the effect of actively taking fresh air and passively dehumidifying is achieved.

[0046] In this embodiment, further, an electric control cavity 22 is arranged above the evaporating cavity 3 on one side of the condensing cavity 2, and an electric control box (not shown in the figure) is installed in the electric control cavity 22. A control screen 23 is installed on the front panel of the casing 1 corresponding to the electric control cavity 22.

[0047] As shown in Figure 3 , the following describes the wind field circulation in the heating mode in detail:

[0048] In this mode, the compressor 16, the inner circulating fan 6 and the outer circulating fan 8 are all running. After the compressor 16 compresses the refrigerant into high-temperature and high-pressure gas, the refrigerant gas enters the condenser 7, and the refrigerant releases heat to condense into liquid state in the condenser 7. After throttling, the condensed refrigerant enters the evaporator 9, and the refrigerant absorbs heat to evaporate into refrigerant gas in the evaporator 9. Finally, the refrigerant gas returns to the compressor 16 through the gas-liquid separator 17.

[0049] In this process, the fresh air valve 15 and the dehumidification air valve are both in the closed state. Under the action of the inner circulating fan 6, the air in the curing barn enters the return air cavity 4 through the return air outlet 10 and moves upward to flow through the condenser 7 to exchange heat with the high-temperature refrigerant in the condenser 7. The refrigerant releases heat to the outside to increase the temperature of the return air. Under the action of the inner circulating fan 6, the hot air is sent to the curing barn to heat the curing barn, and the circulation is repeated to achieve the purpose of heating. At the same time, under the action of the outer circulating fan 8, the outdoor air enters the evaporating cavity 3 through the outer circulating air inlet 18, passes through the evaporator 9, and the refrigerant in the evaporator 9 absorbs heat to evaporate. The heat-exchanged air is discharged through the outer circulating air outlet 13.

[0050] As shown in Figure 4 , the following describes the wind field circulation in the dehumidification mode in detail:

[0051] In this mode, the compressor 16, the inner circulating fan 6 and the outer circulating fan 8 are all running. After the compressor 16 compresses the refrigerant into high-temperature and high-pressure gas, the refrigerant gas enters the condenser 7, and the refrigerant releases heat to condense into liquid state in the condenser 7. After throttling, the condensed refrigerant enters the evaporator 9, and the refrigerant absorbs heat to evaporate into refrigerant gas in the evaporator 9. Finally, the refrigerant gas returns to the compressor 16 through the gas-liquid separator 17.

[0052] In this process, the fresh air valve 15 and the dehumidification air valve are both in the closed state.

[0053] Under the action of the inner circulating fan 6, the air in the curing barn partially enters the return air cavity 4 through the return air inlet 10, and the fresh air also enters the return air cavity 4 through the fresh air valve 15, the return air and the fresh air are mixed in the return air cavity 4, the mixed air moves upward and flows through the condenser 7, and heat exchange is performed between the condenser 7 and the high-temperature refrigerant in the condenser 7, the refrigerant releases heat outward, the temperature of the return air is increased, and under the action of the inner circulating fan 6, the heated air is sent to the curing barn to heat the curing barn, and the heating is repeated to achieve the heating purpose.

[0054] Due to the input of the fresh air, the air in the curing barn is in positive pressure, when the air reaches the return air inlet 10, since the dehumidification channel 5 is opened, part of the air in the curing barn enters the dehumidification channel 5, and then is discharged to the evaporation cavity 3 through the dehumidification air valve, and heat exchange is performed between the dehumidification air valve and the evaporator 9, the evaporator 9 absorbs the heat of the discharged humid hot air, heat recovery is achieved, in this process, the wind field circulates to remove the high-humidity gas in the curing barn, new air is injected into the curing barn, and the process is repeated to achieve the purpose of reducing humidity.

[0055] Meanwhile, under the action of the outer circulating fan 8, the air outside the curing barn enters the evaporation cavity 3 through the outer circulating air inlet 18, passes through the evaporator 9, the refrigerant in the evaporator 9 absorbs heat and evaporates, and the air after heat exchange is discharged through the outer circulating air outlet 13.

[0056] The above technical scheme has the following beneficial effects:

[0057] 1、The utility model discloses a reasonable structure layout, makes new air, dehumidification, heat recovery function all integration to the unit inside, and makes humid hot air can according to the set route discharge, not only reduces the risk of condensate of the condensate of the unit around, can also better and faster control the temperature and humidity in the curing barn, makes the temperature and humidity control efficiency further improve.

[0058] 2、The utility model discloses unit installation is convenient, need not install the dehumidification window on the curing barn, the humid hot air that the curing barn is discharged can realize heat recovery in the unit, and energy is fully utilized, makes the energy efficiency ratio of unit higher, improves the temperature and humidity control efficiency, enhances the precision of control.

[0059] 3、The utility model discloses return air and new air share a fan, and evaporation and dehumidification also share a fan, so that the internal structure of the device is compact and reasonable, and it is also beneficial to modify the existing unit structure.

[0060] 4、The utility model discloses control humidity through the opening and closing structure of the dehumidification channel export end, reduces the use of dehumidification evaporator and dehumidification fan in the existing drying unit, makes the structure of unit more simple, also reduces the cost of unit.

[0061] The above merely describes preferred embodiments of the present application and is not intended to limit the present application in any form, although the present application has been disclosed as above with preferred embodiments, however, it is not intended to limit the present application, any person skilled in the art without departing from the technical scheme of the present application can make some changes or modifications to the above-mentioned technical content for equivalent embodiments, the implementation schemes in the above-mentioned embodiments can be further combined or replaced, as long as it does not deviate from the content of the technical scheme of the present application, any simple modification, equivalent change and modification made to the above-mentioned embodiments according to the technical essence of the present application still belongs to the scope of the present application.

Claims

1. An open type integrated drying machine set with heat recovery comprising a housing, characterized in that: The condensing cavity, the evaporating cavity, the return air cavity and the exhaust channel are separated in the shell, the condenser and the inner circulating fan are installed in the condensing cavity, the evaporator and the outer circulating fan are installed in the evaporating cavity, the return air cavity is communicated with the condensing cavity, the return air inlet and the fresh air inlet are arranged on the shell corresponding to the return air cavity, the inlet end of the exhaust channel is communicated with the curing room, and the outlet end of the exhaust channel is selectively communicated or disconnected with the evaporating cavity through the opening and closing structure.

2. The open integrated drying machine set with heat recovery according to claim 1, characterized in that: The opening and closing structure arranged at the outlet end of the exhaust channel is an exhaust louver or an exhaust air valve.

3. The open integrated drying machine set with heat recovery according to claim 1, characterized in that: The exhaust channel is embedded in the return air cavity, and the exhaust channel is isolated by the partition plate installed in the return air cavity.

4. The open integrated drying machine set with heat recovery according to claim 3, characterized in that: The exhaust channel is arranged at the bottom of the return air cavity, and the exhaust channel is surrounded by the U-shaped partition plate and the bottom plate of the shell, and the outlet end of the exhaust channel is connected to the partition plate separating the return air cavity and the evaporating cavity.

5. The open integrated drying machine set with heat recovery according to claim 3, characterized in that: The inlet of the exhaust channel is embedded in the central area of the return air inlet transversely.

6. The open integrated drying machine set with heat recovery according to claim 1, characterized in that: The return air cavity is arranged below the condensing cavity, the evaporating cavity is arranged on one side of the return air cavity, the condenser is horizontally arranged in the condensing cavity, the inner circulating fan is installed above the condenser, the inner circulating exhaust inlet is arranged on the top plate of the shell corresponding to the inner circulating fan, and the outer circulating exhaust inlet is arranged on the side plate of the shell corresponding to the outer circulating fan.

7. The open integrated drying machine set with heat recovery according to claim 6, characterized in that: The electric control cavity is arranged above the evaporating cavity on one side of the condensing cavity, the electric control box is installed in the electric control cavity, and the control screen is installed on the front panel of the shell.

8. The open integrated drying machine set with heat recovery according to claim 6, characterized in that: The compressor is installed in the evaporating cavity, the compressor is arranged on the air inlet side of the evaporator, and the compressor, the evaporator and the outer circulating fan are arranged transversely in the evaporating cavity.

9. The open integrated drying machine set with heat recovery according to claim 8, characterized in that: The outer circulating air inlet is arranged on the bottom plate of the evaporating cavity shell.

10. The open integrated dryer set with heat recovery according to claim 1, characterized in that: The fresh air inlet is arranged above the return air inlet, and the fresh air inlet and the return air inlet are arranged on the side plate of the shell, and the fresh air valve is arranged at the fresh air inlet.

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