CN210036199U - Energy-saving heat pump drying system - Google Patents
Energy-saving heat pump drying system Download PDFInfo
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- CN210036199U CN210036199U CN201821853478.9U CN201821853478U CN210036199U CN 210036199 U CN210036199 U CN 210036199U CN 201821853478 U CN201821853478 U CN 201821853478U CN 210036199 U CN210036199 U CN 210036199U
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Abstract
The utility model provides an energy-saving heat pump drying system, includes organism, drying room, be equipped with the return air passageway in the organism, still including the inside precooling heat transfer device, heat pipe evaporator, heat pipe condenser and the compressor that connects gradually, multistage condenser, throttling element, multistage evaporimeter and the fan of locating the organism, damp and hot air in the drying room is by return air passageway process precooling heat transfer device in proper order, heat pipe evaporator, multistage evaporimeter, heat pipe condenser and multistage evaporimeter form high temperature drying air and send into the drying room by the fan. The utility model discloses having combined the heat pump principle, having adopted the environment-friendly freon refrigerant to make the medium, make full use of heat pump system adopt the electric power energy to realize condensing water's function to air heating and temperature drop to and heat pipe and precooling heat exchanger are to the principle effect of heat recovery transfer, thereby realize environmental protection and power saving and consumption reduction's dual effect, show promotion society and economic benefits.
Description
Technical Field
The invention belongs to the technical field of heat pumps, and particularly relates to an energy-saving heat pump drying system.
Background
With the increasing requirements for air pollution treatment, the use limit of coal and fuel oil is increased, and the energy source mode is replaced by electricity, so that the application of the steam compression type heat pump drying system is more and more common under the large background, and the trend is to create a heat pump system which saves electricity and energy. At present, drying is the most developed application of a heat pump, particularly the drying of temperature sensitive materials, and is the main application of a modern industrial heat pump. As the demand for advanced dehumidification technology increases, heat pump drying becomes more important from the aspects of product quality, energy conservation, environmental protection, and the like.
The existing heat pump drying system is connected with a heat pump system and a drying room through an air return channel and an air supply channel to form air circulation, damp and hot air enters the air return channel from the drying room and is cooled and dehumidified through an evaporator and a condenser respectively, and dry and hot air enters the drying room through the air supply channel so as to dry materials in the drying room. However, the existing heat pump drying system has the defects of insufficient air circulation, large energy consumption, large system space volume and the like.
In the working process of the heat pump, the water temperature and the air temperature in the air are in dynamic change, in the external environment, the difference of different temperatures and humidity in seasons is also huge, the mutual influence of various factors is not considered in the conventional heat pump system, so that intelligent regulation and control cannot be realized in the working process, the loss of a large amount of energy is caused, and the system operation is not stable enough.
Disclosure of Invention
The invention aims to provide an energy-saving heat pump drying system, which realizes the double effects of all-weather environmental protection, electricity saving and consumption reduction.
In order to achieve the purpose, the invention provides an energy-saving heat pump drying system, which comprises a machine body and a drying room, wherein a return air channel is arranged in the machine body,
also comprises a precooling heat exchange device, a heat pipe evaporator, a heat pipe condenser, a compressor, a multi-stage condenser, a throttling element, a multi-stage evaporator and a fan which are connected in sequence,
the hot and humid air in the drying room sequentially passes through the precooling heat exchange device, the heat pipe evaporator, the multistage evaporator, the heat pipe condenser and the multistage evaporator through the return air channel to form high-temperature dry air which is sent into the drying room by the fan.
After a fan and a compressor are started, damp and hot air in a drying room enters a pre-cooling heat exchange device for heat exchange under the action of the fan, primary cooling is achieved, a small amount of water is condensed out, then the damp and hot air achieves secondary temperature reduction through the outer surface of a heat pipe evaporator and the heat absorption effect of a heat exchange medium in the heat pipe evaporator, a small amount of water is condensed out, then the damp and hot air passes through the outer surface of a multi-stage evaporator once, multiple times of temperature reduction is achieved, a large amount of water is condensed out, finally the damp and hot air sequentially passes through a heat pipe condenser and a multi-stage condenser and is gradually heated, finally the damp and hot air is changed into high-temperature dry and hot air which is sent into the drying room, materials in the drying room are dried, then the damp and hot air returns to the pre-cooling heat exchanger to continue to circulate next round, and the.
Therefore, the invention fully utilizes the functions of the heat pump system for heating air and reducing temperature and condensed water by adopting electric energy and the principle and function of the heat pipe and the precooling heat exchanger for heat recovery and transfer by the arrangement of the multi-stage pipelines, thereby realizing the dual effects of environmental protection, electricity saving and consumption reduction and obviously improving the social and economic benefits.
Preferably, the compressor uses environment-friendly Freon refrigerant and is arranged in the machine body.
Preferably, the environment-friendly freon refrigerant is one or more of R134a and R245 fa.
The throttling element comprises an electronic expansion valve, a thermal expansion valve or a capillary tube and is arranged in the machine body.
Wherein multistage evaporimeter can be set up side by a plurality of evaporimeters, occupation space and small to establish ties each other, treat that dry air loops through multistage evaporimeter and realizes multiple cooling. Similarly, the multistage condenser can be arranged side by a plurality of condensers, the occupied space and the volume are small, the multistage condenser is connected in series, and the air to be dried sequentially passes through the plurality of condensers connected in series to realize multiple temperature rise.
The heat pipe condenser and the heat pipe evaporator are fin type heat exchangers or micro-channel heat exchangers and are arranged in the machine body, and environment-friendly Freon refrigerants are filled in the heat pipe condenser and the heat pipe evaporator. Wherein the environment-friendly Freon refrigerant is one or more of R134a and R245 fa.
Furthermore, the precooling heat exchange device comprises an air-cooling precooling heat exchange device and a water-cooling precooling heat exchange device.
Because the precooling modes required under different seasonal environments are different, the air-cooled precooling heat exchange device and the water-cooled precooling heat exchange device are adopted, the system can automatically select whether water-cooled precooling or air-cooled precooling is adopted according to a preset occasion mode or a preset seasonal mode, on the basis, a water flow rate matched with the precooling heat exchanger or an outdoor draught fan is provided with a variable frequency regulation measure, the air inlet and outlet temperature parameters of the precooling heat exchanger are collected through a self-control element, the water inlet and outlet and the ventilation volume are automatically calculated, judged and regulated, the heat transfer quantity balance of the cold side and the heat side of the precooling heat exchanger is realized, and the.
The water cooling is realized by adopting a mode of externally connecting a condensed water source, and the externally connecting water source circularly flows to realize one-time cooling. Wherein the air cooling adopts the form of connecting into the fan, introduces external wind, realizes the wind current cooling.
Therefore, the heat pump drying system can flexibly select the precooling heat exchange device according to the change of the external environment, realize more intelligent adjustment and judgment, and is more energy-saving and environment-friendly.
Further, the air-cooled precooling heat exchange device comprises an air-cooled precooling heat exchanger and an outdoor draught fan connected with the air-cooled precooling heat exchanger, the air-cooled precooling heat exchanger is a plate-fin heat exchanger, and one side of the machine body is provided with an outdoor draught port communicated with the outside.
Plate-fin heat exchangers are heat exchangers that use flat plates and fins as heat transfer elements. It is mainly composed of plate bundles and end sockets. There are several channels in the plate bundle. Fins are placed between the two plates of each layer of channels and sealed with seals on both sides. Wherein the fins have the forms of straight, porous, saw-tooth, corrugated, etc. According to different fluid flowing modes, the cold fluid channel and the hot fluid channel are overlapped at intervals, arranged and brazed into a whole, namely the plate bundle is manufactured. The two fluid flow modes include counter flow, cross flow and the like. The main advantages of the plate-fin heat exchanger are that the efficiency is high: because of the disturbance of the fins to the fluid, the boundary layer forming the thermal resistance is continuously updated, and the heat transfer coefficient is generally 3 times of that of a shell-and-tube heat exchanger; and the heat recovery effect is good at a small temperature difference of 1.5-2 ℃. The effect is best when the catalyst is used for gas-gas heat exchange. The method is compact: because most of the heat is transferred through the flat plate by the fins, the heat transfer area of the unit volume of the equipment can reach 1500 m/m. The weight is light: the same heat transfer area, weight is similar to 1/5 for shell and tube heat exchangers. And (3) firmness: the plate bundle is a one-piece member and the fins support between the two plates, so that a high working pressure can be borne.
The air-cooled precooling heat exchanger is communicated with the air return channel, air to be dried enters the air return channel from the drying room and then enters the air-cooled precooling heat exchanger, and the air after being cooled once passes through the heat pipe evaporator and the like, so that the processes of cooling, heating and drying are realized. The outdoor induced draft fan introduces outside air from the outdoor induced draft opening, and the outside air is blown out from the outlet of the outdoor induced draft fan, so that air cooling is realized.
Further, the water-cooling precooling heat exchange device comprises a water-cooling precooling heat exchanger which is a fin type heat exchanger, and a water source water inlet and a water source water outlet which are connected with the water-cooling precooling heat exchanger are arranged on one side of the machine body.
The water-cooling precooling heat exchanger utilizes external water source to realize condensation, and the cooling effect is good, organism one side is equipped with the water source water inlet and the water source delivery port of connecting the water-cooling precooling heat exchanger, and external water source gets into from the water inlet, through the condensate water piping of water-cooling precooling heat exchanger, flows out from the export again, realizes the condensation.
Further, the internal heat exchange medium of the water-cooling precooling heat exchanger is water or brine.
The water or the brine is adopted, the wet and hot air to be dried carries out heat exchange with the water, the brine or the outdoor air flowing in the precooling heat exchanger, and the water or the brine has wide sources, low cost and good cooling effect.
Furthermore, the water-cooling precooling heat exchanger, the multistage condenser, the heat pipe condenser, the multistage evaporator and the heat pipe evaporator are arranged in the machine body side by side and tightly.
The water-cooling precooling heat exchanger, the multi-stage condenser, the heat pipe condenser, the multi-stage evaporator and the heat pipe evaporator are arranged side by side and tightly, so that the structural space of a machine body can be saved, the pipe running distance in the system can be shortened, and the loss of refrigerant energy is reduced, thereby enabling the system to meet the energy-saving requirement. In the invention, the hot side of the refrigerating system is the condenser, the cold side of the refrigerating system is the evaporator, the mutual influence of temperature caused by cold and hot interaction is avoided, and meanwhile, the heat transfer between the air and the outer wall of the machine body when the air passes through the condenser and the evaporator in sequence can be avoided, so that the goodness of fit between the temperature value of the air and the design value is high, and the drying temperature in the drying room can be more accurate.
Preferably, the split-flow heat pump drying system further comprises a water pan, and the water pan is arranged below the water-cooling precooling heat exchanger, the multi-stage condenser, the heat pipe condenser, the multi-stage evaporator and the heat pipe evaporator which are closely arranged side by side. In the refrigeration passageway, the air can constantly separate out moisture at the process of dehumidification step by step, and the moisture that separates out flows into the water collector down under the effect of gravity in to the body outside of unified discharge can avoid the moisture that separates out to amass inside the organism, leads to various equipment in the refrigeration passageway to wet or steep, makes various equipment damage.
Furthermore, the multi-stage evaporator at least comprises a first-stage evaporator and a second-stage evaporator, and the first-stage evaporator and the second-stage evaporator are fin type heat exchangers or micro-channel heat exchangers.
Furthermore, the multistage condenser at least comprises a first-stage condenser and a second-stage condenser, and the first-stage condenser and the second-stage condenser are fin type heat exchangers or micro-channel heat exchangers.
The condenser and the evaporator of the heat pump drying system of the invention both adopt two-stage design, realize the function of two kinds of temperature-lowering condensate water, the heat pipe condenser and the heat pipe evaporator are arranged at the front and back positions of the evaporator, and the function of one kind of temperature-lowering condensate water is realized.
The finned heat exchanger consists of partition boards, fins, sealing strips and flow deflectors. The heat exchanger is characterized in that fins, flow deflectors and seals are arranged between two adjacent partition plates to form an interlayer, the interlayer is called a channel, the interlayer is overlapped according to different fluid modes and is brazed into a whole to form a plate bundle, the plate bundle is the core of the plate-fin heat exchanger, and necessary end sockets, connecting pipes, supports and the like are matched to form the plate-fin heat exchanger. It can be made of steel, aluminum, steel-aluminum composite, copper and the like. Wherein the steel finned heat exchanger: the air heating efficiency is high, the bearing capacity is strong, the installation is simple, the energy consumption of the system is low, and the temperature is increased quickly by adopting a convection heat dissipation mode; the steel has the characteristic of macromolecules, is suitable for penetrating steam, and does not feel obvious dryness in use. The temperature is rapidly increased, the method is low-carbon and energy-saving, green and environment-friendly, no peculiar smell is generated at high temperature, and the health of human bodies is not damaged. Steel-aluminum composite fin type heat exchanger: the heat-conducting plate is tightly combined, has small thermal resistance, good heat transfer performance, high strength, small flow loss and strong corrosion resistance, is not easy to deform under long-term cold and hot working conditions, and has long service life; the integrally rolled fin is smooth, burr-free, wrinkle-free and easy to clean, condensed water on the surface of the fin is easy to remove when wet cooling is carried out in heating air conditioning engineering, and dust and scale are not easy to form on drying heating and other heat exchange occasions. Aluminum finned heat exchanger: the light-weight heat transfer performance is good, the strength is high, the flow loss is small, the corrosion resistance is high, the deformation is not easy to occur under long-term cold and hot working conditions, and the service life is long. Copper finned heat exchanger: the copper radiator has the advantages of good heat conductivity, quick heat dissipation, high efficiency, compact shape, small occupied space, high efficiency and energy conservation.
The micro-channel heat exchanger is a heat exchanger with the channel equivalent diameter of 10-1000 mu m. The heat exchanger has tens of fine flow channels in the flat tube, and the fine flow channels are connected to the circular headers at both ends of the flat tube. The header is internally provided with a baffle plate to divide the heat exchanger flow passage into a plurality of flows. The micro-channel heat exchanger can be made of polymethyl methacrylate, nickel, copper, stainless steel, ceramic, silicon, Si3N4, aluminum and the like. The micro-channel heat exchanger is compared with a copper pipe aluminum fin, and because the micro-channel heat exchanger is all aluminum, the material cost is saved, and the heat exchange efficiency is improved in the same area in structure.
Therefore, the invention selects the two heat exchangers to realize better energy-saving effect.
The air-cooled pre-cooling heat exchange device is matched with an air-cooled variable frequency regulator, the water-cooled pre-cooling heat exchange device is matched with a water-cooled variable frequency regulator, the electric control system is respectively and electrically connected with the air-cooled variable frequency regulator and the water-cooled variable frequency regulator, and the air-cooled variable frequency regulator is used for collecting air inlet and outlet temperature parameters, automatically calculating, judging and regulating ventilation volume; the water-cooling variable frequency regulator is used for collecting air inlet and outlet temperature parameters, automatically calculating, judging and regulating water flow.
The electric control system is arranged in the machine body, so that the electric control of the whole device, the start and stop of the whole device and the control of each parameter are realized. The drying room can set up the temperature and humidity inductor, and the inductor is connected with the electrical system electricity, and through the change of drying room temperature and humidity, air-cooled frequency conversion regulator and water-cooled frequency conversion regulator realize the nimble regulation of air volume and discharge according to the humiture data that the temperature and humidity inductor provided, guarantee that the heat transfer volume of precooling heat exchanger cold and hot both sides is balanced to guarantee the reliable and stable operation of system.
Furthermore, the fan and the outdoor induced draft fan adopt axial flow type, centrifugal type or through flow type.
The fan and the outdoor induced draft fan can be any one of the three types, the two types can be the same, and the fan and the outdoor induced draft fan can also be flexibly selected according to the installation position.
In consideration of the fact that a cold source of the pre-cooling heat exchanger is cooling water, brine or air provided by the outside during actual operation, the water temperature and the air temperature can change along with different water source sources or seasonal changes, and the heat exchange quantity with the outside air passing through the pre-cooling heat exchanger is different, so that a heat balance factor exists. In order to solve the problem, the control system can automatically select whether water cooling precooling or air cooling precooling is adopted according to a preset occasion mode or a season mode.
Therefore, the working process of the whole heat pump drying system comprises the following steps:
firstly, a fan is started, then a compressor is started, moist and hot air in a drying room is conveyed to a water-cooling precooling heat exchanger or an air-cooling precooling heat exchanger through a return air channel under the action of the fan and exchanges heat with water or saline water or air in the moist and hot air, the moist and hot air is cooled for the first time, and a small amount of water is condensed out; secondly, the temperature of the damp and hot air is reduced for the second time through the outer surface of the heat pipe evaporator and the heat absorption effect of the environment-friendly Freon refrigerant as the heat exchange medium in the heat pipe evaporator, and a small amount of water is condensed out along with the damp and hot air; then the water passes through the outer surfaces of the first-stage evaporator and the second-stage evaporator at one time, and is subjected to temperature reduction for the third time and the fourth time respectively, and a large amount of water is condensed out; and finally, the temperature is gradually increased through the heat pipe condenser, the primary condenser and the secondary condenser, the high-temperature dry hot air is finally changed into high-temperature dry hot air and sent into the drying room to dry the materials in the drying room, and then the high-temperature dry hot air returns to the precooling heat exchanger to continue the next cycle, and the whole heat pump drying process is realized through continuous reciprocating in sequence. Wherein the moisture that condenses out drips to the water collector in, by the device that can external absorb water, perhaps sets up the water collector for the slope form, the moisture of being convenient for discharges, avoids corroding internal component.
The invention has the beneficial effects that:
(1) the invention combines the heat pump principle, adopts the environment-friendly Freon refrigerant as a medium, and fully utilizes the functions of the heat pump system for heating air and cooling condensed water by adopting electric energy and the principle function of the heat pipe and the precooling heat exchanger for heat recovery and transfer, thereby realizing the dual effects of environmental protection, electricity saving and consumption reduction, and obviously improving the social and economic benefits.
(2) The condenser and the evaporator of the refrigeration system of the invention both adopt two-stage design, realize the function of dual temperature-reducing condensation water, the heat pipe heat exchangers are arranged at the front and the back of the evaporator, and realize the function of a heavy temperature-reducing condensation water, a water-cooling precooling heat exchanger and an air-cooling precooling heat exchanger are arranged at the upstream of the heat exchanger, one of the precooling heat exchangers can be selectively opened according to the use occasion or seasonal variation, namely, the water-cooling or air-cooling preheating is selected, and the function of a heavy temperature-reducing condensation water is realized, thus, the principle layout of a quadruple temperature-reducing condensation water is completely formed, the efficiency is higher, and the energy is more saved.
(3) The water-cooling precooling heat exchanger, the multi-stage condenser, the heat pipe condenser, the multi-stage evaporator and the heat pipe evaporator are arranged side by side and tightly, so that the structural space of a machine body can be saved, the pipe running distance in a system can be shortened, and the loss of refrigerant energy is reduced, thereby enabling the system to meet the energy-saving requirement.
(4) According to the invention, by adopting the air-cooling precooling heat exchange device and the water-cooling precooling heat exchange device, the system can automatically select whether water-cooling precooling or air-cooling precooling is adopted according to a preset occasion mode or a season mode, on the basis, a water flow rate matched with the precooling heat exchanger or an outdoor induced draft fan is matched with a variable frequency regulation measure, the air inlet and outlet temperature parameters of the precooling heat exchanger are collected through a self-control element, the water inlet and the air outlet are automatically calculated, judged and regulated, the heat transfer quantity balance of the cold side and the heat side of the precooling heat exchanger is realized.
Drawings
Fig. 1 is a schematic front view of a heat pump drying system according to the present invention.
Fig. 2 is a schematic side view of the heat pump drying system of the present invention.
Fig. 3 is a schematic side view of the heat pump drying system according to the present invention.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
An energy-saving heat pump drying system is shown by combining figures 1-2, and comprises a machine body 1 and a drying room 2, wherein an air return channel 3 is arranged in the machine body 1,
also comprises a precooling heat exchange device 11, a heat pipe evaporator 12, a heat pipe condenser 13 which are arranged inside the machine body 1, and a compressor 14, a multi-stage condenser 15, a throttling element, a multi-stage evaporator 16 and a fan 17 which are connected in sequence,
the hot and humid air in the drying room 2 passes through the precooling heat exchange device 11, the heat pipe evaporator 12, the multistage evaporator 16, the heat pipe condenser 13 and the multistage condenser 15 in sequence through the return air channel 3 to form high-temperature dry air which is sent into the drying room 2 through the fan 17.
After the fan 17 and the compressor 14 are started, the hot and humid air in the drying room 2 enters the pre-cooling heat exchange device 11 for heat exchange under the action of the fan 17, so that the first cooling is realized, a small amount of water is condensed out, then the hot and humid air passes through the outer surface of the heat pipe evaporator 12, and through the heat absorption effect of the heat exchange medium in the heat pipe evaporator 12, the second cooling is realized, a small amount of water is condensed out, then the hot and humid air passes through the outer surface of the multistage evaporator 16 for a plurality of times, a large amount of water is condensed out, finally the hot and humid air passes through the heat pipe condenser 13 and the multistage condenser 15 in sequence, the temperature is gradually increased, finally the hot and humid air which becomes the high-temperature dry air is sent into the drying room 2, the materials in the drying room 2 are subjected to the next cycle, and then returned to the pre-cooling heat exchanger for continuous drying in sequence.
Preferably, the compressor 14 uses environment-friendly freon refrigerant and is installed in the machine body 1.
Preferably, the environment-friendly freon refrigerant is one or more of R134a and R245 fa.
Wherein the throttling element comprises an electronic expansion valve, a thermal expansion valve or a capillary tube and is arranged in the machine body 1.
Wherein multistage evaporimeter 16 can be set up by a plurality of evaporimeters side by side, and occupation space and small to establish ties each other, wait that dry air loops through multistage evaporimeter 16 and realize multiple cooling. Similarly, the multistage condenser 15 may be formed by arranging a plurality of condensers side by side, and have a small occupied space and a small volume, and are connected in series, and the air to be dried is heated in multiple stages by sequentially passing through the plurality of condensers connected in series.
The heat pipe condenser 13 and the heat pipe evaporator 12 are fin type heat exchangers or micro-channel heat exchangers, are arranged in the machine body 1, and are filled with environment-friendly Freon refrigerants. Wherein the environment-friendly Freon refrigerant is one or more of R134a and R245 fa.
As shown in fig. 3, further, the pre-cooling heat exchanger 11 includes an air-cooling pre-cooling heat exchanger 111 and a water-cooling pre-cooling heat exchanger 112.
Because the precooling modes required under different seasonal environments are different, the system firstly can automatically select whether to adopt water-cooling precooling or air-cooling precooling according to a preset occasion mode or a preset seasonal mode by adopting the air-cooling precooling heat exchange device 111 and the water-cooling precooling heat exchange device 112.
Further, as shown in fig. 3, the air-cooled precooling heat exchange device 111 includes an air-cooled precooling heat exchanger 10 and an outdoor induced draft fan 20 connected to the air-cooled precooling heat exchanger 10, the air-cooled precooling heat exchanger 10 is a plate-fin heat exchanger, and as shown in fig. 1, an outdoor induced draft port 60 communicated with the outside is arranged on one side of the machine body 1.
The air-cooled precooling heat exchanger 10 is communicated with the return air channel 3, air to be dried enters the return air channel 3 from the drying room 2 and then enters the air-cooled precooling heat exchanger 10, and the processes of cooling, heating and drying are realized by the once cooled air passing through the heat pipe evaporator 12 and the like. The outdoor induced draft fan 20 introduces outside air from the outdoor induced draft opening 60, and blows the air out from the outlet of the outdoor induced draft fan 20, so that air cooling is realized.
Further, as shown in fig. 3, the water-cooling precooling heat exchange device 112 includes a water-cooling precooling heat exchanger 30, the water-cooling precooling heat exchanger 30 is a fin-type heat exchanger, and as shown in fig. 1, a water source water inlet 40 and a water source water outlet 50 connected to the water-cooling precooling heat exchanger 30 are arranged on one side of the machine body 1. A water source water inlet 40 and a water source water outlet 50 which are connected with the water-cooling precooling heat exchanger 30 are arranged on one side of the machine body 1, an external water source enters from the water inlet, passes through a condensed water pipeline of the water-cooling precooling heat exchanger 30 and then flows out from the outlet, and condensation is realized.
Further, the internal heat exchange medium of the water-cooled precooling heat exchanger 30 is water or brine.
Further, as shown in fig. 2 to fig. 3, the water-cooled precooling heat exchanger 30, the multistage condenser 15, the heat pipe condenser 13, the multistage evaporator 16 and the heat pipe evaporator 12 are closely arranged in the machine body 1 side by side.
In the invention, the hot side of the refrigerating system is the condenser, the cold side of the refrigerating system is the evaporator, the mutual influence of temperature caused by cold and hot interaction is avoided, and meanwhile, the heat transfer between the air and the outer wall of the machine body 1 when the air passes through the condenser and the evaporator in sequence can be avoided, so that the matching degree of the temperature value and the design value of the air is high, and the drying temperature in the drying room 2 can be more accurate.
Preferably, as shown in fig. 3, the split-flow type heat pump drying system further includes a water pan 70, and the water pan 70 is disposed below the water-cooled precooling heat exchanger 30, the multistage condenser 15, the heat pipe condenser 13, the multistage evaporator 16, and the heat pipe evaporator 12 which are closely arranged side by side.
Further, the multi-stage evaporator 16 at least includes a first-stage evaporator 161 and a second-stage evaporator 162, and the first-stage evaporator 161 and the second-stage evaporator 162 are fin heat exchangers or microchannel heat exchangers.
Further, the multi-stage condenser 15 at least comprises a first-stage condenser 151 and a second-stage condenser 152, and the first-stage condenser 151 and the second-stage condenser 152 are fin type heat exchangers or micro-channel heat exchangers.
The condenser and the evaporator of the heat pump drying system of the invention both adopt two-stage design, realize the function of two kinds of temperature-lowering condensate water, the heat pipe condenser 13 and the heat pipe evaporator 12 are arranged at the front and back of the evaporator, and the function of one kind of temperature-lowering condensate water is realized, an air-cooled precooling heat exchanger 10 and a water-cooled precooling heat exchanger 30 are arranged at the upstream of the heat exchanger, one of the precooling heat exchangers can be selectively opened according to the use occasion or season change, namely, the water-cooled or air-cooled preheating is selected, and the function of one kind of temperature-lowering condensate water is realized, so that the principle layout of four kinds of temperature-lowering condensate water is completely formed.
Further, the air-cooled pre-cooling heat exchange device comprises an electric control system 4, wherein an air-cooled variable frequency regulator is matched with the air-cooled pre-cooling heat exchange device 111, a water-cooled pre-cooling heat exchange device 112 is matched with the water-cooled variable frequency regulator, the electric control system 4 is respectively and electrically connected with the air-cooled variable frequency regulator and the water-cooled variable frequency regulator, and the air-cooled variable frequency regulator is used for collecting air inlet and outlet temperature parameters, automatically calculating, judging and regulating ventilation volume; the water-cooling variable frequency regulator is used for collecting air inlet and outlet temperature parameters, automatically calculating, judging and regulating water flow.
The electric control system 4 is arranged in the machine body 1, and realizes electric control of the whole device, start and stop of the whole device and control of each parameter. The drying room 2 can set up the temperature and humidity inductor, and the inductor is connected with electrical system 4 electricity, and through the change of 2 temperature in drying room and humidity, air-cooled frequency conversion regulator and water-cooling frequency conversion regulator realize the nimble regulation of air volume and discharge according to the humiture data that the temperature and humidity inductor provided, guarantee that the heat transfer volume of precooling heat exchanger cold and hot both sides is balanced to the reliable and stable operation of assurance system.
Further, the fan 17 and the outdoor induced draft fan 20 adopt an axial flow type, a centrifugal type or a cross flow type.
The fan 17 and the outdoor induced draft fan 20 may be any one of the three, and the two may be the same or may be flexibly selected according to the installation position. The control system can automatically select whether to adopt water cooling precooling or air cooling precooling according to a preset occasion mode or a season mode.
Therefore, the working process of the whole heat pump drying system comprises the following steps:
firstly, a fan 17 is started, then a compressor 14 is started, moist and hot air in a drying room 2 is conveyed to a water-cooling precooling heat exchanger 30 or an air-cooling precooling heat exchanger 10 through a return air channel 3 under the action of the fan 17 to exchange heat with water or saline water or air in the air, the moist and hot air is cooled for the first time, and a small amount of water is condensed out; then, the temperature of the damp and hot air is reduced for the second time through the outer surface of the heat pipe evaporator 12 and the heat absorption effect of the heat exchange medium environment-friendly Freon refrigerant in the heat pipe evaporator 12, and a small amount of water is condensed out along with the damp and hot air; then, the temperature of the waste water passes through the outer surfaces of the primary evaporator 161 and the secondary evaporator 162 for the third time and the fourth time respectively, and a large amount of water is condensed out; and finally, the temperature is gradually increased through the heat pipe condenser 13, the primary condenser 151 and the secondary condenser 152, the high-temperature dry hot air is finally sent into the drying room 2, the materials in the drying room 2 are dried, and then the high-temperature dry hot air returns to the precooling heat exchanger to continue the next cycle, and the whole heat pump drying process is realized through continuous reciprocating in sequence. Wherein the condensed water drops to the water receiving tray 70, and the water receiving tray 70 is connected with a water absorbing device or is arranged to be inclined, so that the water can be discharged conveniently, and the corrosion to the internal components can be avoided.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention. Those skilled in the art can also make other changes and the like in the design of the present invention within the spirit of the present invention as long as they do not depart from the technical effects of the present invention. Such variations are intended to be included within the scope of the invention as claimed.
Claims (10)
1. The utility model provides an energy-saving heat pump drying system, includes organism (1), drying room (2), be equipped with return air passageway (3) in organism (1), its characterized in that, still including locating inside precooling heat transfer device (11) of organism (1), heat pipe evaporator (12), heat pipe condenser (13) and compressor (14) that connect gradually, multistage condenser (15), throttling element, multistage evaporator (16) and fan (17), damp and hot air in drying room (2) is by return air passageway (3) through precooling heat transfer device (11) in proper order, heat pipe evaporator (12), multistage evaporator (16), heat pipe condenser (13) and multistage condenser (15) form high temperature drying air and send into drying room (2) by fan (17).
2. The heat pump drying system of claim 1, wherein the pre-cooling heat exchange device (11) comprises an air-cooled pre-cooling heat exchange device (111) and a water-cooled pre-cooling heat exchange device (112).
3. The heat pump drying system of claim 2, wherein the air-cooled precooling heat exchange device (111) comprises an air-cooled precooling heat exchanger (10) and an outdoor induced draft fan (20) connected with the air-cooled precooling heat exchanger (10), the air-cooled precooling heat exchanger (10) is a plate-fin heat exchanger, and an outdoor induced draft opening (60) communicated with the outside is formed in one side of the machine body (1).
4. The heat pump drying system of claim 2, wherein the water-cooling pre-cooling heat exchange device (112) comprises a water-cooling pre-cooling heat exchanger (30), the water-cooling pre-cooling heat exchanger (30) is a finned heat exchanger, and a water source water inlet (40) and a water source water outlet (50) which are connected with the water-cooling pre-cooling heat exchanger (30) are arranged on one side of the machine body (1).
5. The heat pump drying system of claim 4, wherein the internal heat exchange medium of the water-cooled pre-cooling heat exchanger (30) is water or brine.
6. The heat pump drying system of claim 4, wherein the water-cooled precooling heat exchanger (30), the multistage condenser (15), the heat pipe condenser (13), the multistage evaporator (16) and the heat pipe evaporator (12) are arranged side by side closely within the housing (1).
7. Heat pump drying system according to claim 1, characterized in that the multi-stage evaporator (16) comprises at least a primary evaporator (161) and a secondary evaporator (162), the primary evaporator (161) and the secondary evaporator (162) being fin heat exchangers or micro channel heat exchangers.
8. Heat pump drying system according to claim 1, characterized in that the multistage condenser (15) comprises at least a primary condenser (151) and a secondary condenser (152), the primary condenser (151) and the secondary condenser (152) being fin-type heat exchangers or microchannel heat exchangers.
9. The heat pump drying system according to claim 2, further comprising an electric control system (4), wherein the air-cooled pre-cooling heat exchange device (111) is provided with an air-cooled variable frequency regulator in a matching manner, the water-cooled pre-cooling heat exchange device (112) is provided with a water-cooled variable frequency regulator in a matching manner, the electric control system (4) is electrically connected with the air-cooled variable frequency regulator and the water-cooled variable frequency regulator in an interconnection manner, and the air-cooled variable frequency regulator is used for collecting air inlet and outlet temperature parameters, automatically calculating, judging and regulating ventilation volume; the water-cooling variable frequency regulator is used for collecting air inlet and outlet temperature parameters, automatically calculating, judging and regulating water flow.
10. The heat pump drying system of claim 3, wherein the fan (17) and the outdoor induced fan (20) are of axial, centrifugal or cross-flow type.
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| CN201821853478.9U CN210036199U (en) | 2018-11-09 | 2018-11-09 | Energy-saving heat pump drying system |
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| CN201821853478.9U CN210036199U (en) | 2018-11-09 | 2018-11-09 | Energy-saving heat pump drying system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556386A (en) * | 2018-11-09 | 2019-04-02 | 广东申菱环境系统股份有限公司 | A kind of energy-saving heat pump drying system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556386A (en) * | 2018-11-09 | 2019-04-02 | 广东申菱环境系统股份有限公司 | A kind of energy-saving heat pump drying system |
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