CN210220562U - Tunnel type composite heat pump dehumidification drying system with heat pipe heat recovery function - Google Patents

Tunnel type composite heat pump dehumidification drying system with heat pipe heat recovery function Download PDF

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CN210220562U
CN210220562U CN201920823170.8U CN201920823170U CN210220562U CN 210220562 U CN210220562 U CN 210220562U CN 201920823170 U CN201920823170 U CN 201920823170U CN 210220562 U CN210220562 U CN 210220562U
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heat
heat exchanger
air
chamber
drying
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Xiaofeng Wu
伍晓锋
Shuming Li
李书明
Shaoqing Li
李少庆
Lei Zhang
张磊
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Henan Sino Swiss Refrigeration Technology Co Ltd
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Henan Sino Swiss Refrigeration Technology Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/80Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
    • Y02P60/85Food storage or conservation, e.g. cooling or drying
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

The utility model discloses a tunnel type composite heat pump dehumidification drying system with heat pipe heat recovery, which comprises a drying channel, wherein an air return chamber, an air supply chamber and an equipment chamber are arranged at the top or one side of the drying channel; the air inlet side of the air return fan is arranged in the air return chamber, and the air outlet side of the air return fan is communicated with the equipment chamber; the air inlet side of the air supply fan is communicated with the equipment chamber, and the air outlet side of the air supply fan is arranged in the air supply chamber; the first heat exchanger is provided with a heat pipe heat exchanger I, the evaporation end of the heat pipe heat exchanger I is positioned on one side of the first heat exchanger facing the air return chamber, and the condensation end of the heat pipe heat exchanger I is positioned on one side of the first heat exchanger facing the heat pump unit; an auxiliary heating device is arranged outside the device chamber. The utility model has high drying efficiency, high heat utilization rate and good drying effect, and can realize preheating recovery, effectively reduce heat loss and reduce drying cost; the utility model discloses application scope is extensive, can be used to the stoving of various food, agricultural product, industrial product etc..

Description

Tunnel type composite heat pump dehumidification drying system with heat pipe heat recovery function
Technical Field
The utility model relates to a drying equipment technical field, concretely relates to take compound heat pump dehumidification drying system of tunnel type of heat pipe heat recovery.
Background
With the continuous expansion of the industrial production scale, the traditional drying efficiency and high-cost drying method can not meet the requirements of many fields on material drying, the heat pump drying solves the problems of low efficiency and high cost of the traditional drying technology to a great extent, and the heat pump drying is applied in many fields at present. In the prior art, the drying room is mostly provided with a heat pump dryer in a matching way to realize the drying of logistics and products such as various agricultural products, aquatic products, industrial products and the like.
In the prior art, a heat pump dryer used in a drying room is mostly split, and is divided into an outdoor unit and an indoor unit, installation positions need to be reserved in advance, and field installation is complicated; the drying machines of some integral types are small in size and convenient to install, but the drying capacity is limited, a drying room usually needs to be provided with a plurality of drying machines to meet the drying requirement, the drying efficiency is not high, the cost is not reduced, the combination between the drying machines and the drying room is not tight enough, and the heat utilization rate is not high.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a tunnel type composite heat pump dehumidification drying system that intensification is fast, drying efficiency is high, heat utilization rate is high and take heat pipe heat recovery.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the tunnel type composite heat pump dehumidification drying system with the heat pipe heat recovery function comprises a drying channel, wherein an air return chamber, an air supply chamber and an equipment chamber, wherein the air return chamber is arranged at the top or one side of the drying channel and is close to the inlet end of the drying channel, the air supply chamber is arranged at the end close to the outlet end of the drying channel, and the equipment chamber is arranged between the air return chamber and the air supply chamber;
an air return opening is formed in the top or side wall position, adjacent to the air return chamber, of the drying channel, and an air supply opening is formed in the top or side wall position, adjacent to the air supply chamber, of the drying channel; a return air fan is arranged on a partition plate of the return air chamber adjacent to the equipment chamber, and an air supply fan is arranged on a partition plate of the air supply chamber adjacent to the equipment chamber; the air inlet side of the air return fan is arranged in the air return chamber, and the air outlet side of the air return fan is communicated with the equipment chamber; the air inlet side of the air supply fan is communicated with the equipment chamber, and the air outlet side of the air supply fan is arranged in the air supply chamber;
a first heat exchanger, a heat pump unit and a second heat exchanger which are correspondingly connected are sequentially arranged in the equipment chamber, the first heat exchanger is positioned at one side close to the air return chamber, and the second heat exchanger is positioned at one side close to the air supply chamber; the first heat exchanger is provided with a heat pipe heat exchanger I, the evaporation end of the heat pipe heat exchanger I is positioned on one side of the first heat exchanger facing the air return chamber, and the condensation end of the heat pipe heat exchanger I is positioned on one side of the first heat exchanger facing the heat pump unit;
and auxiliary temperature rising equipment is arranged outside the equipment room and comprises a third heat exchanger which is correspondingly communicated to the heat pump unit through a pipeline.
In the above technical scheme, treat in the stoving passageway is sent into to the material of drying, the heat pump set work in the equipment room, the damp and hot air in the stoving passageway is under the drive of return air fan, get into the return air room via the return air inlet, get into the equipment room through the return air fan, be condensed the dehumidification through first heat exchanger earlier (first heat exchanger plays the effect of evaporimeter), then heat by the second heat exchanger (the second heat exchanger plays the effect of condenser), the air after the heating gets back to in the stoving passageway through the supply-air outlet via the air supply fan, so circulate, realize the stoving to the interior material of stoving passageway. Wherein, equipment among the drying system sets up at the top or the lateral part of stoving passageway, and drying equipment and stoving passageway close coupling, integration set up can reduce the heat waste, improve drying efficiency.
Preferably, a drain tank is arranged below the first heat exchanger, and a drain pipe connected to the drain tank and extending to the outside is used for draining the condensed water generated by the first heat exchanger.
Preferably, the heat pipe heat exchanger I is composed of a plurality of groups of evaporation ends and condensation ends which correspond to each other one by one, in each group of evaporation ends and condensation ends, a refrigerant outlet of the evaporation end is communicated to a refrigerant inlet of the condensation end, a refrigerant outlet of the condensation end is communicated to a refrigerant inlet of the evaporation end, the evaporation end and the condensation end are communicated by a copper pipe, and refrigerants in each group of evaporation ends and condensation ends form an independent closed circulation loop.
The evaporation end and the condensation end of the heat pipe heat exchanger I are arranged on two sides of the first heat exchanger, when the damp and hot air in the drying channel passes through the first heat exchanger, heat exchange is firstly carried out between the damp and hot air and the evaporation end of the heat pipe heat exchanger I, the liquid refrigerant in the evaporation end absorbs heat and is evaporated into gaseous refrigerant, the damp and hot air is subjected to heat exchange with the first heat exchanger after the temperature of the damp and hot air is reduced, more moisture in the air can be liquefied into condensed water, and the dehumidification efficiency is improved; the gaseous refrigerant absorbing heat in the evaporation end flows into the condensation end, exchanges heat with low-temperature low-humidity air passing through the first heat exchanger to preheat the low-temperature low-humidity air, and the preheated air is heated by the second heat exchanger and then enters the drying channel. After the refrigerant in the condensation end exchanges heat with low-temperature low-humidity air, the gaseous refrigerant is cooled and condensed into liquid refrigerant, and flows back into the evaporation end under the action of gravity or external driving force to circulate, so that the heat utilization rate is improved.
Preferably, a fresh air port and a moisture exhaust port are arranged on the side wall of one side of the equipment room, the fresh air port is positioned between the first heat exchanger and the second heat exchanger, the moisture exhaust port is positioned between the air return chamber partition plate and the first heat exchanger, and a fresh air fan and a moisture exhaust fan are respectively arranged at the fresh air port and the moisture exhaust port; the fresh air port is close to the top of the side wall of the equipment room, and the moisture exhaust port is close to the bottom of the side wall of the equipment room.
Preferably, a heat pipe heat exchanger ii is arranged on the inner sides of the dehumidifying fan and the fresh air fan, an evaporation end of the heat pipe heat exchanger ii is arranged on the air inlet side of the dehumidifying fan, a condensation end of the heat pipe heat exchanger ii is arranged on the air outlet side of the fresh air fan, a refrigerant outlet of the evaporation end is communicated to a refrigerant inlet of the condensation end, and a refrigerant outlet of the condensation end is communicated to a refrigerant inlet of the evaporation end.
When the wet exhaust fan works, the wet and hot air firstly passes through the evaporation end of the heat pipe exchanger II, and the refrigerant in the evaporation end absorbs the heat in the wet and hot air, so that the temperature of the wet and hot air is reduced and then the wet and hot air is exhausted by the wet exhaust fan; the liquid refrigerant in the evaporation end absorbs heat and is evaporated into a gaseous refrigerant, the gaseous refrigerant flows upwards into the condensation end along the pipeline and exchanges heat with new air introduced by the new air fan, the heat of the refrigerant in the condensation end is absorbed by the new air, so that the temperature of the new air is raised, a preheating effect is achieved, the gaseous refrigerant in the condensation end is condensed into the liquid refrigerant after being cooled, the liquid refrigerant flows back into the evaporation end under the action of gravity or external driving force, and the cycle is carried out, so that the waste heat recovery and the utilization of the humid and hot air are realized.
Preferably, the auxiliary heating equipment comprises a shell, the third heat exchanger is arranged in the shell, an air inlet is formed in the side wall, adjacent to the third heat exchanger, of the shell, and an outdoor fan is arranged on the side wall on the other corresponding side.
When the drying system initially works, the internal heat pump drying unit works, the external auxiliary heating equipment is started, external air enters the auxiliary heating equipment to exchange heat with the third heat exchanger under the driving of the outdoor fan, and then is discharged through the outdoor fan, and the circulation is carried out. And the third heat exchanger is used for absorbing heat in the outside air when working and releasing the heat at the second heat exchanger through a refrigerant. The air in the drying channel can be rapidly heated during initial work, when the temperature in the drying channel reaches a set value, the external auxiliary heating equipment is closed, and only the internal heat pump drying equipment stably operates.
Preferably, the heat pump unit comprises a compressor, a liquid storage device, a drying filter, electromagnetic flow valves, an expansion valve, a liquid separator and a gas-liquid separator, wherein an exhaust port of the compressor is connected with an inlet of a second heat exchanger, an outlet of the second heat exchanger is connected with an inlet of the liquid storage device, an outlet of the liquid storage device is connected with an inlet of the drying filter, an outlet of the drying filter is divided into two parts, one outlet is communicated to an inlet of the first heat exchanger sequentially through one group of electromagnetic flow valves, the expansion valve and the liquid separator, and the other outlet is communicated to an inlet of the third heat exchanger sequentially through the other group of electromagnetic flow valves, the; the outlet pipeline of the first heat exchanger and the outlet pipeline of the third heat exchanger are combined into a whole and connected to the inlet of the gas-liquid separator, and the outlet of the gas-liquid separator is connected to the return air port of the compressor; the number of the compressors in the heat pump unit is one or more than one; the connecting pipeline in the heat pump unit is connected by a copper pipe, and a refrigerant is filled in the pipeline.
Preferably, the first heat exchanger, the second heat exchanger and the third heat exchanger are any one of finned tube type, plate-strip type, plate-fin type or micro-channel type air-cooled heat exchangers.
Preferably, the heat pipe heat exchanger I and the heat pipe heat exchanger II are gravity type heat pipe heat exchangers or power type heat pipe heat exchangers. The gravity type heat pipe exchanger requires that the horizontal position of the condensation end is slightly higher than that of the evaporation end, so that the refrigerant in the gravity type heat pipe exchanger can flow in the pipeline under the action of gravity.
Preferably, the two groups of heat exchange fins of the first heat exchanger are horizontally arranged or arranged in a V shape, when the heat exchange fins are arranged in the V shape, the openings of the heat exchange fins face the direction of the air return chamber, and the included angle between the two groups of heat exchange fins is more than or equal to 60 degrees; the two groups of heat exchange fins of the second heat exchanger are horizontally arranged or arranged in a V shape, when the heat exchange fins are arranged in the V shape, the openings of the heat exchange fins face the direction of the air supply chamber, and the included angle between the two groups of heat exchange fins is more than or equal to 60 degrees. When two sets of heat exchanger fins are the setting of "V" type, can use the bigger heat exchanger fin of length in limited space, increase the area of contact of air and heat exchanger fin, the time of extension circulation through the heat exchanger fin improves heat exchange efficiency.
Preferably, a conveying mechanism for bearing products to be dried is arranged in the drying channel, and the conveying mechanism conveys the materials to be dried from an inlet of the drying channel to an outlet of the drying channel.
The conveying mechanism can adopt a trolley for bearing the materials to be dried; a conveying belt moving in the drying channel can also be adopted; a sliding rail and matched conveying equipment which moves on the sliding rail can also be adopted; or the production line is combined, the produced product is directly conveyed into the drying channel by the production line, stays for a certain time and then is conveyed to the next production procedure by the outlet of the drying channel. The material moving direction is opposite to the hot air circulation direction, so that the drying is accelerated, and the heat loss is reduced. The length of the drying channel can be set according to the requirement.
Preferably, the side wall and the top of the drying channel are both made of heat-insulating plates; the air return chamber, the equipment chamber and the air supply chamber are all separated by heat insulation plates; the joints between the heat preservation plates are hermetically connected; heat loss can be reduced.
Preferably, a temperature and humidity sensor is arranged in the drying channel and used for monitoring the temperature and humidity in the drying channel; and an electric control device is arranged outside the drying channel.
The beneficial effects of the utility model reside in that:
1. the utility model discloses tunnel type drying system adopts the mode that sets up heat pump drying equipment at stoving passageway top or lateral part, and the combination between drying equipment and the stoving passageway is inseparabler, and the integration sets up, is favorable to the thermal cycle of air, reduces the heat waste, improves the heat utilization ratio.
2. Arranging a moisture removal fan and a fresh air fan for moisture removal of air in the drying channel and supplement of fresh air; the external auxiliary heating equipment is arranged, so that heat of outside air can be absorbed when the drying system initially works, heat is supplemented for the internal heat pump drying equipment, and air in the drying channel is rapidly heated.
3. The evaporation end and the condensation end of the heat pipe heat exchanger I are arranged on the two sides of the first heat exchanger, so that the humid and hot air passing through the first heat exchanger can be cooled, dehumidified and preheated, the waste heat of the humid and hot air is favorably recycled, the dehumidification efficiency is improved, and the heat utilization rate is improved; set up heat pipe exchanger II in hydrofuge fan and new trend fan inboard, can discharge again after cooling down moist hot air, the heat in the moist hot air is used for preheating the new air that new trend fan introduced, has realized the recovery and the utilization to moist hot air waste heat, has further improved heat utilization rate.
4. The air circulation direction in the drying channel is opposite to the material moving direction, so that the drying is accelerated, and the heat loss is reduced; the drying channel can be combined with the production line, so that the drying process becomes a ring on the production line, the production line directly penetrates through the drying channel, the product to be dried is enabled to stay for a certain time through the drying channel, and the product is directly conveyed to the next production process after being dried, thereby being beneficial to improving the production efficiency and saving the production cost.
5. The tunnel type drying system has high drying efficiency, high heat utilization rate and good drying effect, and can realize preheating recovery, effectively reduce heat loss and reduce drying cost; the utility model discloses application scope is extensive, can be used to the stoving of various food, agricultural product, industrial product etc..
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a tunnel type composite heat pump dehumidification drying system with heat recovery of heat pipes according to the present invention;
FIG. 2 is a top view of the interior of the drying system of FIG. 1;
FIG. 3 is an external side view of the drying system of FIG. 1;
FIG. 4 is an internal side view of the drying system of FIG. 1;
FIG. 5 is a schematic view of a heat pump unit circulation loop;
FIG. 6 is a schematic structural view of a heat pipe heat exchanger I arranged on two sides of a first heat exchanger;
FIG. 7 is a schematic view of a connection mode of an evaporation end and a condensation end of a heat pipe heat exchanger I on two sides of a first heat exchanger;
FIG. 8 is a schematic structural diagram of a heat pipe exchanger II;
FIG. 9 is a heat exchange schematic diagram of a heat pipe heat exchanger;
fig. 10 is a schematic structural diagram of another embodiment of the tunnel type composite heat pump dehumidification drying system with heat recovery of heat pipes of the present invention.
Reference numbers in the figures: 1 drying channel, 2 air return chamber, 3 air supply chamber and 4 equipment chamber; 5 air return inlet, 6 air supply outlet; 7 return air fans and 8 air supply fans; 9, a first heat exchanger, 10 heat pump units and 11 a second heat exchanger; 12 fresh air inlets, 13 moisture exhaust inlets, 14 fresh air fans and 15 moisture exhaust fans; 16 auxiliary heating equipment, 17 outdoor fan; 18 evaporation ends of the heat pipe heat exchangers I, 19 condensation ends of the heat pipe heat exchangers I, and 20 and 23 heat pipe connecting pipes; 21 the evaporation end of the heat pipe exchanger II and 22 the condensation end of the heat pipe exchanger II.
Detailed Description
The following examples are provided only for illustrating the embodiments of the present invention in detail and are not intended to limit the scope of the present invention in any way.
Example 1: a tunnel type composite heat pump dehumidification drying system with heat pipe heat recovery is disclosed, referring to figures 1-7, and comprises a drying channel 1, wherein a wind return chamber 2 which is separated by a partition plate and is close to one end of an inlet of the drying channel 1, a wind supply chamber 3 which is close to one end of an outlet of the drying channel 1 and an equipment chamber 4 which is arranged between the wind return chamber 2 and the wind supply chamber 3 are arranged at the top of the drying channel 1.
An air return opening 5 is formed in the position, located in the air return chamber 2, of the top of the drying channel 1, and an air supply opening 6 is formed in the position, located in the air supply chamber 3, of the top of the drying channel 1; a return air fan 7 is arranged on the partition plate of the return air chamber 2 adjacent to the equipment chamber 4, and an air supply fan 8 is arranged on the partition plate of the air supply chamber 3 adjacent to the equipment chamber 4; the air inlet side of the air return fan 7 is arranged in the air return chamber 2, and the air outlet side of the air return fan 7 is communicated with the equipment chamber 4; the air inlet side of the air supply fan 8 is communicated with the equipment chamber 4, and the air outlet side of the air supply fan 8 is arranged in the air supply chamber 3.
A first heat exchanger 9, a heat pump unit 10 and a second heat exchanger 11 which are correspondingly connected are sequentially arranged in the equipment room 4, the first heat exchanger 9 is positioned at one side close to the air return room 2, and the second heat exchanger 11 is positioned at one side close to the air supply room 3; the first heat exchanger 9 is provided with a heat pipe heat exchanger I, an evaporation end 18 of the heat pipe heat exchanger I is positioned on one side of the first heat exchanger 9 facing the air return chamber 2, and a condensation end 19 of the heat pipe heat exchanger I is positioned on one side of the first heat exchanger 9 facing the heat pump unit 10. The heat pipe heat exchanger I is composed of a plurality of groups of evaporation ends and condensation ends which correspond to each other one by one, in each group of evaporation ends and condensation ends, a refrigerant outlet of the evaporation end is communicated to a refrigerant inlet of the condensation end, a refrigerant outlet of the condensation end is communicated to a refrigerant inlet of the evaporation end, the evaporation end and the condensation end of the heat pipe heat exchanger I are communicated through a heat pipe connecting pipe 20, the heat pipe connecting pipe 20 is a copper pipe, and refrigerants in each group of evaporation ends and condensation ends form an independent closed circulation loop. A drain tank and a drain pipe connected to the drain tank and extending to the outside for discharging the condensed water generated from the first heat exchanger are provided below the first heat exchanger 9, and the drain tank and the drain pipe are not shown in the drawings, but those skilled in the art can understand and implement the functions, functions and arrangement thereof.
A fresh air port 12 and a moisture exhaust port 13 are arranged on the side wall of one side of the equipment room 4, the fresh air port 12 is positioned between the first heat exchanger 9 and the second heat exchanger 11, the moisture exhaust port 13 is positioned between the partition plate of the air return room 2 and the first heat exchanger 9, and a fresh air fan 14 and a moisture exhaust fan 15 are respectively arranged at the fresh air port 12 and the moisture exhaust port 13; the fresh air port 12 is arranged close to the top of the side wall of the equipment room 4, and the moisture exhaust port 13 is arranged close to the bottom of the side wall of the equipment room 4.
An auxiliary temperature raising device 16 is arranged outside the device chamber 4, and the auxiliary temperature raising device 16 comprises a shell and a third heat exchanger arranged in the shell; an air inlet is arranged on the side wall of the shell adjacent to the third heat exchanger, and an outdoor fan 17 is arranged on the side wall of the other corresponding side. The internal structure of the auxiliary temperature raising device 16 is not shown in the drawings, but those skilled in the art can understand the technical content, the operation principle and the arrangement mode and implement the same.
The heat pump unit comprises a compressor, a liquid storage device, a drying filter, an electromagnetic flow valve, an expansion valve, a liquid separator and a gas-liquid separator, and the connection mode of the heat pump circulation loop is as follows: an air outlet of the compressor is connected with an inlet of the second heat exchanger 11, an outlet of the second heat exchanger 11 is connected with an inlet of the liquid storage device, an outlet of the liquid storage device is connected with an inlet of the dry filter, an outlet of the dry filter is divided into two parts, one outlet is communicated to an inlet of the first heat exchanger 9 sequentially through one group of electromagnetic flow valves, expansion valves and liquid distributors, and the other outlet is communicated to an inlet of the third heat exchanger sequentially through the other group of electromagnetic flow valves, expansion valves and liquid distributors; an outlet pipeline of the first heat exchanger 9 and an outlet pipeline of the third heat exchanger are combined into a whole and connected to an inlet of the gas-liquid separator, and an outlet of the gas-liquid separator is connected to a return air port of the compressor; the number of the compressors in the heat pump unit 10 is one or more than one; the connecting pipeline in the heat pump unit 10 is copper pipe connection, and the pipeline is filled with a refrigerant. The components of the heat pump unit are not shown, but those skilled in the art will understand and implement the functions and actions of the various components, the connection of the circulation loops, and the operation principle.
The two groups of heat exchange fins of the first heat exchanger 9 are horizontally arranged or arranged in a V shape, when the heat exchange fins are arranged in the V shape, the openings of the heat exchange fins face the direction of the air return chamber 2, and the included angle between the two groups of heat exchange fins is more than or equal to 60 degrees; the two groups of heat exchange fins of the second heat exchanger are horizontally arranged or arranged in a V shape, when the heat exchange fins are arranged in the V shape, the openings of the heat exchange fins face the direction of the air supply chamber 3, and the included angle between the two groups of heat exchange fins is more than or equal to 60 degrees.
A conveying mechanism for bearing products to be dried is arranged in the drying channel 1, and the conveying mechanism conveys the materials to be dried from an inlet of the drying channel to an outlet. The conveying mechanism can adopt a trolley for bearing the materials to be dried; a conveying belt moving in the drying channel can also be adopted; a sliding rail and matched conveying equipment which moves on the sliding rail can also be adopted; or the production line is combined, the produced product is directly conveyed into the drying channel by the production line, stays for a certain time and then is conveyed to the next production procedure by the outlet of the drying channel. The material moving direction is opposite to the hot air circulation direction, so that the drying is accelerated, and the heat loss is reduced. The length of the drying channel can be set as required, and warehouse doors can be arranged at two ends of the drying channel, or other modes are adopted for heat insulation.
The side wall and the top of the drying channel 1 are both made of heat-insulating plates; the air return chamber 2, the equipment chamber 4 and the air supply chamber 3 are all separated by heat insulation plates; the joints between the heat preservation plates are all connected in a sealing way. A temperature and humidity sensor is arranged in the drying channel.
Fig. 9 is a schematic diagram of heat exchange of a heat pipe heat exchanger, and it can be seen from the diagram that the temperature of the hot and humid air at the air return port of the drying channel is high (for example, about 50 ℃), decreases (for example, about 40 ℃) when passing through the evaporation end of the heat pipe heat exchanger i, continues to decrease (for example, about 15 ℃) when passing through the first heat exchanger, is preheated when passing through the condensation end of the heat pipe heat exchanger i, increases (for example, about 40 ℃) in temperature, is heated when passing through the second heat exchanger, continues to increase (for example, about 60 ℃) in temperature, and the heated air returns to the drying channel from the air supply port.
Example 2: a tunnel type composite heat pump dehumidification drying system with heat pipe heat recovery is different from that of embodiment 1 in that a heat pipe heat exchanger II is arranged on the inner sides of a dehumidification fan 15 and a fresh air fan 14, an evaporation end 21 of the heat pipe heat exchanger II is arranged on the air inlet side of the dehumidification fan 15, a condensation end 22 of the heat pipe heat exchanger II is arranged on the air outlet side of the fresh air fan 14, a refrigerant outlet of an evaporation end of the heat pipe heat exchanger II is communicated with a refrigerant inlet of the condensation end, a refrigerant outlet of a condensation end of the heat pipe heat exchanger II is communicated with a refrigerant inlet of the evaporation end, a heat pipe connecting pipe 21 is communicated between the evaporation end and the condensation end of the heat pipe heat exchanger II, the heat pipe connecting pipe 20 is a copper pipe, and refrigerants in each group of the evaporation end.
Example 3: a tunnel type composite heat pump dehumidification drying system with heat pipe heat recovery is disclosed, referring to fig. 10, a return air chamber 2, an equipment chamber 4 and an air supply chamber 3 are not arranged at the top of a drying channel 1, but arranged at one side of the drying channel 1, a return air inlet 5 is arranged on the side wall of the return air chamber 2 adjacent to the drying channel 1, and an air supply outlet 6 is arranged on the side wall of the air supply chamber 3 adjacent to the drying channel 1. The structure of the other part is the same as embodiment 1 or embodiment 2.
In the above embodiment, the first heat exchanger 9, the second heat exchanger 11, and the third heat exchanger are any one of fin-tube type, plate-strip type, plate-fin type, or microchannel type air-cooled heat exchangers; the heat pipe heat exchanger I and the heat pipe heat exchanger II are gravity type heat pipe heat exchangers or power type heat pipe heat exchangers.
The apparatus elements referred to in the above embodiments are conventional apparatus elements unless otherwise specified.
The utility model discloses take heat recovery's compound heat pump dehumidification drying system of tunnel type's concrete working method does:
when the drying device works initially, the heat pump unit is started, air in the drying channel enters the air return chamber through the air return inlet under the action of the air return fan, then enters the equipment chamber, is condensed and dehumidified through the first heat exchanger, is heated through the second heat exchanger, and returns to the drying channel through the air supply chamber and the air supply outlet under the action of the air supply fan, so that the air in the drying channel is circularly dehumidified and heated, and materials in the drying channel are dried. Meanwhile, the external auxiliary heating equipment is started, the third heat exchanger exchanges heat with external air to absorb heat in the air, heat is supplemented for heat pump circulation through refrigerant circulation, the air in the drying channel is heated rapidly, when the air temperature in the drying channel reaches a set value, the external auxiliary heating equipment stops working, and only the internal drying unit works stably.
When the hot humid air in the drying channel flows back and passes through the first heat exchanger, the hot humid air firstly passes through the evaporation end of the heat pipe heat exchanger I, the refrigerant in the evaporation end absorbs heat in the hot humid air, the hot humid air is subjected to heat exchange with the first heat exchanger after the temperature of the hot humid air is reduced, more moisture in the air can be liquefied into condensed water, the condensed water is changed into relatively low-temperature and low-humidity air, then the air passes through the condensation end of the heat pipe heat exchanger I, the heat of the refrigerant in the absorption condensation end is preheated, the preheated air is heated through the second heat exchanger and then enters the drying channel, and the circulation is carried out, so that the dehumidification efficiency and the heat utilization rate are.
When the humidity in the drying channel reaches a set value, the moisture exhausting fan is started to exhaust a part of moist hot air, so that the air humidity in the drying channel is reduced, and meanwhile, the fresh air fan is started to supplement external air into the internal circulation. Before the damp and hot air is exhausted through the damp and hot fan, the damp and hot air firstly passes through the evaporation end of the heat pipe heat exchanger II, the heat in the damp and hot air is absorbed by the evaporation end, and the damp and hot air is exhausted after the temperature is reduced; and fresh air introduced by the fresh air fan passes through the condensation end of the heat pipe heat exchanger II before entering air circulation, is preheated, then passes through the second heat exchanger for heating, and then enters air circulation in the drying channel. The evaporation end of the heat pipe heat exchanger II absorbs heat in the damp and hot air, the liquid refrigerant is evaporated into a gaseous refrigerant and flows to the condensation end, the gaseous refrigerant is used for heating the new air, and waste heat recovery and utilization of the damp and hot air are achieved.
The drying channel can be combined with a production line, products to be dried are directly conveyed into the drying channel and stay in the drying channel for enough time, and the products are conveyed to the next production procedure after being dried.
The embodiments of the present invention have been described in detail with reference to the drawings and examples, but the present invention is not limited to the above embodiments, and can be modified or changed within the knowledge of those skilled in the art without departing from the spirit of the present invention.

Claims (10)

1. A tunnel type composite heat pump dehumidification drying system with heat pipe heat recovery is characterized by comprising a drying channel, wherein an air return chamber, an air supply chamber and an equipment chamber, wherein the air return chamber is arranged at the top or one side of the drying channel and is separated by a partition plate and is close to one end of an inlet of the drying channel, the air supply chamber is arranged at the end close to an outlet of the drying channel, and the equipment chamber is arranged between the air return chamber and the air supply chamber;
an air return opening is formed in the top or side wall position, adjacent to the air return chamber, of the drying channel, and an air supply opening is formed in the top or side wall position, adjacent to the air supply chamber, of the drying channel; a return air fan is arranged on a partition plate of the return air chamber adjacent to the equipment chamber, and an air supply fan is arranged on a partition plate of the air supply chamber adjacent to the equipment chamber; the air inlet side of the air return fan is arranged in the air return chamber, and the air outlet side of the air return fan is communicated with the equipment chamber; the air inlet side of the air supply fan is communicated with the equipment chamber, and the air outlet side of the air supply fan is arranged in the air supply chamber;
a first heat exchanger, a heat pump unit and a second heat exchanger which are correspondingly connected are sequentially arranged in the equipment chamber, the first heat exchanger is positioned at one side close to the air return chamber, and the second heat exchanger is positioned at one side close to the air supply chamber; the first heat exchanger is provided with a heat pipe heat exchanger I, the evaporation end of the heat pipe heat exchanger I is positioned on one side of the first heat exchanger facing the air return chamber, and the condensation end of the heat pipe heat exchanger I is positioned on one side of the first heat exchanger facing the heat pump unit;
and auxiliary temperature rising equipment is arranged outside the equipment room and comprises a third heat exchanger which is correspondingly communicated to the heat pump unit through a pipeline.
2. The tunnel type compound heat pump dehumidification drying system with heat pipe heat recovery as claimed in claim 1, wherein the heat pipe heat exchanger i is composed of a plurality of sets of evaporation ends and condensation ends in one-to-one correspondence, in each set of evaporation ends and condensation ends, a refrigerant outlet of the evaporation end is communicated to a refrigerant inlet of the condensation end, and a refrigerant outlet of the condensation end is communicated to a refrigerant inlet of the evaporation end.
3. The tunnel type compound heat pump dehumidification drying system with the heat pipe heat recovery function as claimed in claim 2, wherein a fresh air port and a moisture exhaust port are arranged on one side wall of the equipment room, the fresh air port is located between the first heat exchanger and the second heat exchanger, the moisture exhaust port is located between the air return chamber partition plate and the first heat exchanger, and a fresh air fan and a moisture exhaust fan are respectively arranged at the fresh air port and the moisture exhaust port; the fresh air port is close to the top of the side wall of the equipment room, and the moisture exhaust port is close to the bottom of the side wall of the equipment room.
4. The tunnel type compound heat pump dehumidification drying system with heat pipe heat recovery as claimed in claim 3, wherein a heat pipe heat exchanger II is arranged inside the dehumidification fan and the fresh air fan, an evaporation end of the heat pipe heat exchanger II is arranged on the air inlet side of the dehumidification fan, a condensation end of the heat pipe heat exchanger II is arranged on the air outlet side of the fresh air fan, a refrigerant outlet of the evaporation end is communicated to a refrigerant inlet of the condensation end, and a refrigerant outlet of the condensation end is communicated to a refrigerant inlet of the evaporation end.
5. The tunnel type compound heat pump dehumidification drying system with heat pipe heat recovery of claim 1, wherein the auxiliary temperature raising device comprises a housing, the third heat exchanger is disposed in the housing, an air inlet is disposed on a side wall of the housing adjacent to the third heat exchanger, and an outdoor fan is disposed on a corresponding side wall of the housing.
6. The tunnel type compound heat pump dehumidification drying system with the heat pipe heat recovery function is characterized in that the heat pump unit comprises a compressor, a liquid storage device, a drying filter, an electromagnetic flow valve, an expansion valve, a liquid separator and a gas-liquid separator, an exhaust port of the compressor is connected with an inlet of a second heat exchanger, an outlet of the second heat exchanger is connected with an inlet of the liquid storage device, an outlet of the liquid storage device is connected with an inlet of the drying filter, an outlet of the drying filter is divided into two parts, one outlet is communicated to an inlet of the first heat exchanger sequentially through one group of the electromagnetic flow valve, the expansion valve and the liquid separator, and the other outlet is communicated to an inlet of the third heat exchanger sequentially through the other group of the electromagnetic flow valve, the expansion; the outlet pipeline of the first heat exchanger and the outlet pipeline of the third heat exchanger are combined into a whole and connected to the inlet of the gas-liquid separator, and the outlet of the gas-liquid separator is connected to the return air port of the compressor; the number of the compressors in the heat pump unit is one or more than one; the connecting pipeline in the heat pump unit is connected by a copper pipe, and a refrigerant is filled in the pipeline.
7. The tunnel type compound heat pump dehumidification drying system with heat pipe heat recovery of claim 4, wherein the first heat exchanger, the second heat exchanger and the third heat exchanger are any one of fin tube type, plate-belt type, plate-fin type or micro-channel type air-cooled heat exchangers; the heat pipe heat exchanger I and the heat pipe heat exchanger II are gravity type heat pipe heat exchangers or power type heat pipe heat exchangers.
8. The tunnel type compound heat pump dehumidification drying system with heat pipe heat recovery of claim 1, wherein the two sets of heat exchange fins of the first heat exchanger are horizontally arranged or arranged in a V shape, when the heat exchange fins are arranged in the V shape, the openings of the heat exchange fins face the direction of the air return chamber, and the included angle between the two sets of heat exchange fins is more than or equal to 60 degrees; the two groups of heat exchange fins of the second heat exchanger are horizontally arranged or arranged in a V shape, when the heat exchange fins are arranged in the V shape, the openings of the heat exchange fins face the direction of the air supply chamber, and the included angle between the two groups of heat exchange fins is more than or equal to 60 degrees.
9. The tunnel type compound heat pump dehumidification drying system with heat pipe heat recovery of claim 1, wherein a conveying mechanism for carrying a product to be dried is arranged in the drying channel, and the conveying mechanism conveys the material to be dried from an inlet of the drying channel to an outlet of the drying channel.
10. The tunnel type composite heat pump dehumidification drying system with heat pipe heat recovery of claim 1, wherein the side wall and the top of the drying channel are both made of heat preservation plates; the air return chamber, the equipment chamber and the air supply chamber are all separated by heat insulation plates; the joints between the heat preservation plates are hermetically connected; a temperature and humidity sensor is arranged in the drying channel; and an electric control device is arranged outside the drying channel.
CN201920823170.8U 2019-06-03 2019-06-03 Tunnel type composite heat pump dehumidification drying system with heat pipe heat recovery function Active CN210220562U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113865325A (en) * 2021-10-11 2021-12-31 珠海格力电器股份有限公司 Heat pump drying equipment, heat pump drying control method and device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113865325A (en) * 2021-10-11 2021-12-31 珠海格力电器股份有限公司 Heat pump drying equipment, heat pump drying control method and device
CN113865325B (en) * 2021-10-11 2023-10-13 珠海格力电器股份有限公司 Heat pump drying equipment, heat pump drying control method and heat pump drying control device

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