CN106247783A - Heat pump drying machine room and heat pump drying circulation machine room - Google Patents

Abstract

The invention provides a heat pump drying machine room and a heat pump drying cycle machine room, which belong to the processing technology field. The heat pump drying machine room includes a machine room body. The machine room body is equipped with an air heating system, an internal circulation system and a water circulation system. The machine room body includes a heating room and an operating system. The drying chamber includes a plurality of drying chambers, which are divided into two rows of drying chambers, a heat exchanger group is arranged between the two rows of drying chambers, and the opposite sides of the two rows of drying chambers A plurality of drying room doors are arranged respectively, one drying room door is set for each drying bin, and a machine room door is set for the operation room. The heat pump drying cycle machine room includes a circulation pipe and a heat pump drying machine room. The air inlet duct and the exhaust air duct are connected through a circulation pipe, and the circulation pipe is provided with a circulation exhaust fan. Compared with the existing technology, the heat pump dryer room has significantly improved drying efficiency and is more economical and practical. The heat pump drying and circulating machine room realizes air medium circulation heating.

Description

Heat pump drying machine room and heat pump drying cycle machine room

technical field

The invention relates to the field of processing technology, in particular to a heat pump drying machine room and a heat pump drying cycle machine room.

Background technique

The rapid development of the edible fungi industry in the country has led to the formation of artificial cultivation and industrialization. The daily output of each place is very large, and the requirements for dried edible fungus products are also increasing. For the high pollution and high energy consumption of the traditional drying mode, the heat pump drying technology itself Its characteristics can well solve the shortcomings of traditional drying. With the advancement of heat pump drying technology, the heat that previously required four kilowatt-hours of electricity can now achieve the same effect with only one kilowatt-hour of electricity. drying process. Especially the drying of edible fungi with high water content. At this stage, the heat pump dryers provided by the market are not designed for the characteristics of edible fungi. Edible fungi have the following characteristics: 1. High water content, and almost all cultivated edible fungi are more than 90% ;2. Most of them are picked in batches every day; 3. Most of the mushroom sticks of edible fungi can be used as fuel after the fruiting body is picked. low cost.

Therefore, the heat pump dryers on the market at this stage all have low drying efficiency and are not practical.

Contents of the invention

The purpose of the present invention is to provide a heat pump dryer room to improve drying efficiency.

Another object of the present invention is to provide a heat pump drying cycle machine room to realize cycle heating.

The present invention is achieved like this:

A heat pump drying machine room, including a machine room body, which is equipped with an air heating system, an internal circulation system and a water circulation system. The air heating system includes a water circulation heat exchanger, a heat exchanger group, a drying room, Latent heat recovery device and evaporator; the internal circulation system includes evaporators, compressors, heat exchanger groups, condensers and expansion valves that are sequentially connected through Freon pipelines; the water circulation system includes water circulation heat exchangers that are sequentially connected through water pipelines, Latent heat recovery device and condenser; the water circulation heat exchanger is provided with an air inlet channel, and the evaporator is provided with an exhaust channel; the water circulation heat exchanger can transfer the heat of the water medium to the air medium, and the heat exchanger group can transfer the heat of the Freon medium Transfer to the air medium, the latent heat recovery device can transfer the heat of the air medium to the water medium;

The machine room includes a heating room and an operating room. The drying room includes multiple drying bins, which are divided into two rows of drying bins. A heat exchanger group is arranged between the two rows of drying bins. The two rows of drying bins A plurality of drying room doors are respectively arranged on opposite sides of the bin, each drying bin is provided with a drying room door, and the operation room is provided with a machine room door.

The air medium passes through the water circulation heat exchanger to complete the first temperature rise, and after passing through the heat exchanger group to complete the second temperature rise, it enters the drying room to complete the drying of the material, and then enters the latent heat recovery device to complete the first waste heat recovery. The evaporator completes the second waste heat recovery. After the freon medium is heated up by the evaporator, it flows into the heat exchanger group through the compressor to release heat, cools down again in the condenser, and enters the evaporator again through the expansion valve to realize the circular supply of heat. The water medium absorbs the heat of the air medium in the latent heat recovery device, enters the condenser, absorbs the heat of the freon medium again, and finally flows into the latent heat recovery device again to realize the recycling and utilization of waste heat.

The water circulation system is set up to realize the temperature rise of the water medium twice, so that the temperature of the air medium is high enough, the waste heat is recovered twice, and the energy is fully utilized, which not only saves energy, but also improves the overall drying efficiency.

In addition to the location of the drying bin and the exchange room, other device structures can be reasonably arranged. The heating room and operating room are set up to facilitate unit management and are more suitable for industrial production.

Further, both the water circulation system and the internal circulation system also include a waste heat recovery device, which is respectively connected to the condenser and the water circulation heat exchanger through water pipes, and the waste heat recovery device is respectively connected to the condenser and the expansion valve through Freon pipes, and the waste heat recovery The device is capable of transferring the heat of the freon medium to the water medium.

Further, the waste heat recovery device includes a waste heat recovery box, and a spiral pipe is arranged inside the waste heat recovery box, and the two ends of the spiral pipe protrude from the top of the waste heat recovery box and communicate with Freon pipes respectively; The bottom is provided with a water inlet pipe, and the top of the waste heat recovery box is provided with a water outlet pipe, the water inlet pipe communicates with the condenser, and the water outlet pipe communicates with the water circulation heat exchanger.

Further, the heat exchanger group includes at least one exchange chamber, the top of the exchange chamber is provided with a freon outlet and a plurality of exchange air inlets, and the bottom of the exchange chamber is provided with a freon inlet and a plurality of exchange air outlets; the interior of the exchange chamber is provided with Freon pipeline, one end of the Freon pipeline communicates with the Freon inlet, the other end of the Freon pipeline communicates with the Freon outlet; the exchange air inlet communicates with the water circulation heat exchanger through the air pipeline, and the exchange air outlet communicates with the drying chamber through the air pipeline; the Freon inlet and the The compressor is communicated with the Freon pipeline, and the Freon outlet is communicated with the condenser through the Freon pipeline.

Further, a plurality of heat dissipation plates are arranged inside the exchange chamber, and the Freon pipes located inside the exchange chamber are arranged between the plurality of heat dissipation plates.

Further, the latent heat recovery device includes a recovery box, the top of the recovery box is provided with a gas inlet, a gas outlet and a plurality of water spray ports, the bottom of the recovery box is provided with a drain pipe, and the interior of the recovery box is divided into a water spray area And the water accumulation area located below the water spray area, the water spray area is set corresponding to a plurality of water spray ports, the water spray area is located between the gas inlet and the gas outlet; the gas inlet is connected to the drying chamber through the air pipe, and the gas outlet is connected to the evaporation connected through air ducts.

Further, the top of the recovery box is provided with a water delivery pipe and a spraying mechanism, the water delivery pipe is connected to the spraying mechanism, and a plurality of water spray ports are arranged on the spraying mechanism.

Further, the drain pipe is provided with a water pump.

Further, a plurality of material racks are arranged side by side along the vertical direction inside each drying bin, each material rack is arranged horizontally, a drying air outlet is arranged on the top of the drying bin, and a drying air inlet is arranged on the bottom of the drying bin ; The exchange air outlet is connected with the drying air inlet through an air pipe, and the drying air outlet is connected with the gas inlet through an air pipe.

A heat pump drying and circulating machine room includes a circulation pipe and a heat pump drying machine room. The air inlet duct and the air exhaust duct are connected through the circulation pipe, and the circulation pipe is provided with a circulation exhaust fan.

Beneficial effects of the present invention: Compared with the prior art, the heat pump drying machine room has high drying efficiency and is significantly improved, and is more economical and practical. The heat pump drying and circulating machine room realizes air medium circulation heating.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of the overall structure of the total heat pump drying system provided in this embodiment;

Figure 2 is a schematic diagram of the internal structure of the heat exchanger group provided in this embodiment;

Fig. 3 is a schematic diagram of the second overall structure of the total heat pump drying system provided in this embodiment;

Figure 4 is a schematic diagram of the internal structure of the drying chamber provided in this embodiment;

FIG. 5 is a schematic diagram of the overall structure of the heat pump dryer room provided in this embodiment;

Figure 6 is a schematic diagram of the internal structure of the latent heat recovery device provided in this embodiment;

FIG. 7 is a schematic diagram of the internal structure of the waste heat recovery device provided in this embodiment;

Fig. 8 is the overall schematic diagram of the air heating system provided by the present embodiment;

Figure 9 is an overall schematic diagram of the internal circulation system provided by this embodiment;

Figure 10 is an overall schematic diagram of the water circulation system provided by this embodiment;

Fig. 11 is a schematic diagram of the overall structure of the heat pump dryer room provided in this embodiment;

Fig. 12 is a schematic diagram of the third overall structure of the total heat pump drying system provided in this embodiment.

Icons: 100-air heating system; 101-air intake duct; 102-exhaust duct; 103-air duct; 104-circulation pipe; 200-internal circulation system; 201-freon pipeline; 300-water circulation system; ;400-water circulation heat exchanger; 500-heat exchanger group; 501-exchange chamber; 502-freon outlet; 503-exchange air inlet; Air fan; 508-first-stage heat exchanger; 509-second-stage heat exchanger; 600-drying chamber; 601-drying bin; 602-material rack; 603-drying outlet; Air outlet; 605-exhaust fan; 606-return air outlet; 700-latent heat recovery device; 701-recovery box; 702-gas inlet; 703-gas outlet; 704-water spray port; 705-drainage pipe; 706-water spray area; 707-water accumulation area; 708-water delivery pipe; 709-spray mechanism; 710-water pump; 800-evaporator; 900-waste heat recovery device; 901-waste heat recovery box; 902-circling pipe; -water outlet pipe; 110-compressor; 120-condenser; 130-expansion valve; 140-heat pump drying machine room; 141-machine room body; 142-heating room; 143-drying room door; 144-machine room door; 145 - Operating room.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "connected" and "connected" should be interpreted in a broad sense, for example, it can be a fixed connection or an optional connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Embodiment, with reference to Fig. 1 to Fig. 12.

As shown in FIG. 1 , the heat pump drying system includes a water circulation heat exchanger 400 . The water circulation heat exchanger 400 includes a water medium circulation path and an air medium circulation path, and the water circulation heat exchanger 400 is used to transfer heat from the water medium to the air medium. The specific structure of the water circulation heat exchanger 400 adopts the prior art.

Shown in FIG. 2 is a heat exchanger group 500 . The heat exchanger group 500 is used to transfer the heat of the Freon medium to the air medium. The heat exchanger group 500 includes at least one exchange chamber 501, the top of the exchange chamber 501 is provided with a Freon outlet 502 and a plurality of exchange air inlets 503, and the bottom end of the exchange chamber 501 is provided with a Freon inlet 504 and a plurality of exchange air outlets 505; A freon pipe 201 is arranged inside the chamber 501 , one end of the freon pipe 201 communicates with the freon inlet 504 , and the other end of the freon pipe 201 communicates with the freon outlet 502 . The freon pipe 201 provided in the exchange chamber 501 is a circulation path of freon medium. In the exchange chamber 501, the overall circulation path of Freon is from the Freon inlet 504 to the Freon outlet 502, i.e. bottom-up, and the overall circulation path of the air medium is from the exchange air inlet 503 to the exchange air outlet 505, i.e. top-down. Since the air medium absorbs heat from the Freon medium from top to bottom, the temperature of the air medium increases layer by layer from top to bottom, while the temperature of the Freon medium decreases layer by layer from bottom to top. Become a low-temperature high-pressure liquid. The design of the exchange chamber 501 makes the heating effect of the air medium better, and the heat release effect of Freon is better, thereby improving the energy efficiency ratio of the entire heat pump operation system.

In order to improve the heat absorption efficiency of the air medium, the use of the cooling plate 506 can increase the contact area between the heat release area of the Freon medium and the air medium. The inside of the exchange chamber 501 is provided with a plurality of cooling plates 506 , and the Freon pipe 201 is arranged between the plurality of cooling plates 506 . Setting a plurality of cooling plates 506, on the one hand, increases the contact area between the Freon heat release area and the air medium; on the other hand, setting the cooling plates 506 can slow down the flow velocity of the air medium, thereby prolonging the contact time. It can improve the heat absorption effect of the air medium.

Since the air medium in the exchange chamber 501 flows from top to bottom, the installation direction of the cooling plate 506 can also affect the heat absorption efficiency of the air medium. A plurality of cooling plates 506 are vertically arranged side by side, and each cooling plate 506 is arranged horizontally. The air medium needs to pass through the heat dissipation plate 506 sequentially from top to bottom, which can further prolong the contact time between the air medium and the heat dissipation plate 506 and improve the heat absorption efficiency of the air medium.

In order to prevent the laterally arranged cooling plates 506 from obstructing the flow of the air medium, each cooling plate 506 is provided with a plurality of elongated holes side by side. When the flow rate of the air medium is large, the air medium can quickly pass through the elongated hole to ensure the smooth operation of the whole.

Another way can also be used to solve the problem that the cooling plate 506 may hinder the flow of the air medium. The inner wall of the exchange chamber 501 is provided with multiple vertical hollow pipes, the tops of the multiple vertical hollow pipes are spaced from the top wall of the exchange chamber 501, and the bottom ends of the multiple vertical hollow pipes are connected with the bottom of the exchange chamber 501. The walls are arranged at intervals, and a plurality of vertical hollow pipes run through a plurality of cooling plates 506 . When the flow rate of the air medium is large, part of the air medium can pass through the vertical hollow pipe.

Although prolonging the contact time between the air medium and the cooling plate 506 can improve the heat absorption efficiency of the air medium, if the time is too long, it will affect the overall work efficiency. Multiple suction fans 507. The air medium is guided through the cooling plate 506 by the air suction fan 507, so as to speed up the working efficiency and improve the heat absorption efficiency of the air medium.

As shown in FIG. 3 , according to the arrangement of the mounting plate and the suction fan 507 , there are two arrangements of the exchange chamber 501 . One implementation is to set an exchange chamber 501 , and when the exchange chamber 501 is large enough, in order to realize the smooth circulation of the air medium, a plurality of installation plates and suction fans 507 are arranged in the exchange chamber 501 . Another implementation is to set multiple exchange chambers 501, appropriately reduce the volume of each exchange chamber 501, and install installation and suction fans 507 between two adjacent exchange chambers 501 to realize multiple exchange chambers 501 The circulation of air medium between. In the second implementation mode, for example, two exchange chambers 501 are provided, which are respectively the first-stage heat exchanger 508 and the second-stage heat exchanger 509, between the first-stage heat exchanger 508 and the second-stage heat exchanger 509 A suction fan 507 is provided, and the suction fan 507 can suck the air in the first-stage heat exchanger 508 into the second heat exchanger.

The installation position of the suction fan 507 determines the flow path of the air medium in the exchange chamber 501, and multiple suction fans 507 are arranged side by side to ensure the uniform flow of the air medium in the exchange chamber 501 and avoid dead angles of the air medium flow.

As shown in Fig. 4, it is a drying chamber 600, which is a place for drying materials. In this embodiment, edible fungus is mainly used as an example for illustration, and it can also be used for drying other substances, such as fungus and the like. The drying chamber 600 includes at least one drying bin 601, and the inside of each drying bin 601 is provided with a plurality of material racks 602 side by side along the vertical direction, and each material rack 602 is arranged horizontally, and the top of the drying bin 601 is provided with a drying oven. The air outlet 603 and the bottom of the drying chamber 601 are provided with a drying air inlet 604 . The material rack 602 is used for placing materials to be dried, such as white fungus. The hot air enters the drying bin 601 from the drying air inlet 604 , passes through the material rack 602 vertically upwards to dry the tremella fungus, and finally is discharged through the drying air outlet 603 . The drying bin 601 dries the materials vertically upwards. Because each layer is blocked by the material rack 602 and the materials, a large number of tiny hot air circulations are formed between the layers, so that the speed of the hot air passing through the materials per unit time is doubled, and then It can complete the rapid drying of materials with high water content. In addition, the temperature of the air medium in the drying bin 601 decreases vertically upwards, and reaches the top of the drying bin 601. Taking the drying of white fungus as an example, the hot air drops from 85 degrees to 35 degrees, and the air medium forms a steam-saturated gas with a lower temperature. , thus improving the drying energy efficiency.

The interior of the drying bin 601 is also provided with a return air outlet 606, the size of which is adjustable, and the adjustable return air outlet 606 can accelerate the drying finalization and speed of the material at the bottom of the drying bin 601, and improve the drying quality of the material. Can be set individually.

The top of the drying chamber 601 is provided with an exhaust fan 605, which is opposite to the drying air outlet 603, and the exhaust fan 605 can accelerate hot air from the drying air inlet 604 through the material rack 602 to be discharged from the drying air outlet 603. The exhaust fan 605 can be set separately in other embodiments. The material rack 602 may be a material tray, or a material tray may be placed on the material rack 602 .

As shown in Figure 5, it is a heat pump drying machine room 140, which also provides a drying device, including a drying chamber 600 and a heat exchanger group 500. There are multiple drying chambers 601, and the multiple drying chambers 601 are divided into at least two. There are two rows of drying chambers 601, and a heat exchanger group 500 is arranged between two adjacent rows of drying chambers 601. The heat exchanger group 500 is used to transfer the heat of the medium to the air medium. The heat exchange group and the drying air inlet 604 The air medium is communicated with through the air pipe 103, and the air medium enters the drying chamber 601 through the air pipe 103. After being heated by the heat exchanger group 500, the air medium enters the drying bin 601 from the bottom of the drying bin 601, and dries the materials in the drying bin 601 vertically upward. Then complete the rapid drying of materials with high water content.

The heat exchanger group 500 includes at least one exchange chamber 501 , and the adjacent side walls of the exchange chamber 501 and the drying chamber 601 are respectively provided with return air outlets 606 which communicate with each other and whose sizes can be adjusted. The size of the air return port 606 is adjustable, and the adjustable return air port 606 can speed up the drying finalization and speed of the materials at the bottom of the drying chamber 601 and improve the drying quality of the materials.

The middle part of the exchange chamber 501 is also provided with a mounting plate transversely, and the mounting plate is provided with a plurality of suction fans 507 . Two ends of the mounting plate are respectively provided with return air outlets 606 correspondingly. The air return port 606 corresponding to the suction fan 507 can more effectively form a hot air vortex in the drying bin 601, and dry the materials in the drying bin 601 for multiple cycles, thereby improving the drying efficiency.

A plurality of exchange air inlets 503 are arranged side by side at the top of the exchange chamber 501 , and a plurality of exchange air outlets 505 are arranged side by side at the bottom of the exchange chamber 501 . A plurality of exchange air inlets 503 and a plurality of exchange air outlets 505 are set, each exchange air outlet 505 corresponds to a drying bin 601, and the air medium enters the drying bin 601 after being discharged from the exchange chamber 501 to dry the materials in the drying bin 601. drying.

As shown in FIG. 6 , a latent heat recovery device 700 is shown. The latent heat recovery device 700 is used to recover the residual waste heat after drying the material with hot air. The latent heat recovery device 700 includes a recovery box 701, the top of the recovery box 701 is provided with a gas inlet 702, a gas outlet 703 and a plurality of water spray ports 704, the bottom of the recovery box 701 is provided with a drain pipe 705, and the bottom of the recovery box 701 The interior is divided into a water spray area 706 and a water accumulation area 707 below the water spray area 706 . The water spray area 706 is set corresponding to a plurality of water spray ports 704 . The water spray port 704 arranged on the top of the recovery box 701 can spray water vertically downward to form a water spray area 706 , that is, a water curtain-like water spray area 706 . The sprayed water accumulates in the recovery box 701 to form a water accumulation area 707 , and the accumulated water is finally discharged to the next process equipment through the drain pipe 705 . The gas enters the recovery box 701 from the gas inlet 702 and can pass through the water spray area 706 , and then is discharged through the gas outlet 703 . The hot air after drying and utilization enters the recovery box 701 from the gas inlet 702. When the hot air passes through the water spray area 706, part of the water vapor in the hot air contacts with the water in the water spray area 706 and becomes water to release steam. The latent heat, that is, the hot air heats the water in the water spray area 706 , and the water in the water accumulation area 707 is discharged from the drain pipe 705 after its temperature rises. The drain pipe 705 is provided with a water pump 710 , and is pumped to the next device through the water pump 710 . One end of the drain pipe 705 is located at the bottom of the recovery box 701 and is connected with the water pump 710 .

The formation of the water spray area 706 is completed by the spray mechanism 709 provided in the recovery box 701 . The top of the recovery box 701 is provided with a water delivery pipe 708 and a spray mechanism 709 , the water delivery pipe 708 communicates with the spray mechanism 709 , and a plurality of water spray ports 704 are arranged on the spray mechanism 709 . The installation positions of the water spray port 704 and the spray mechanism 709 only need to ensure the positional relationship between the water spray area 706 and the water accumulation area 707 . In this implementation, only a positional relationship is described, and in actual operation, more installation methods can be adopted.

In order to speed up the heat absorption efficiency of the latent heat recovery device 700, the water spray area 706 is divided into a left water spray area 706 and a right water spray area 706, the left water spray area 706 and the right water spray area 706 are arranged at intervals, the left water spray area 706 and the right Between the water spraying areas 706, a partition plate is vertically arranged, and the bottom end of the partition plate is spaced apart from the bottom of the recovery box 701, and the partition plate is provided with an exhaust fan. The partition board is provided with an exhaust fan, which can speed up the hot air passing through the other end from one end of the water spraying area 706, and accelerate the process of releasing heat by the hot air.

As shown in FIG. 7 , a waste heat recovery device 900 is shown. The waste heat recovery device 900 is used to transfer the heat of the freon medium to the water medium. The waste heat recovery device 900 includes a waste heat recovery box 901, and a coiled pipe 902 is arranged inside the waste heat recovery box 901. The bottom of the recovery box 901 is provided with a water inlet pipe 903 , and the top of the waste heat recovery box 901 is provided with a water outlet pipe 904 . Freon medium is used in the coiled pipeline 902, and other mediums can also be used. The water medium enters through the water inlet pipe 903 and is discharged through the water outlet pipe 904. The freon medium in the coiled pipe 902 transfers heat to the water medium and discharges to realize heat exchange.

As shown in Figure 1, the total heat pump drying system can quickly and effectively dry materials such as fungus and white fungus in edible fungi. The total heat pump drying system includes three subsystems: an air heating system 100 , an internal circulation system 200 and a water circulation system 300 .

Due to the characteristics of edible fungi: 1. The water content is large, and almost 90% of the artificially cultivated edible fungi are above 90%; 2. Most of them are picked in batches every day; 3. Most of the mushroom sticks of edible fungi can be used as In terms of fuel consumption, in practice, the cost of traditional drying of edible fungi is extremely low, which is lower than the operating cost of heat pump dryers currently available in the market.

Therefore, the heat pump drying system of the present invention will meet the following conditions; 1. Fast drying requires high drying outlet temperature, large air intake and exhaust volume in the drying room (taking white fungus as an example, the highest temperature of the outlet air temperature reaches 95 Celsius, 45 hp dryer with an air intake of 4-6m ³ /s); 2. The drying efficiency should be high (take white fungus as an example, the material water output rate can reach 5-6kg/kw.h).

As shown in FIG. 8, it is an air heating system 100, and the flow medium in the air heating system 100 is air. The air heating system 100 includes a water circulation heat exchanger 400 , a heat exchanger group 500 , a drying chamber 600 , a latent heat recovery device 700 and an evaporator 800 connected in sequence through an air pipe 103 . "Successive communication" refers to communication in the sequence described in the text, wherein the water circulation heat exchanger 400 and the evaporator 800 may or may not be connected. The water circulation heat exchanger 400 is provided with an air inlet channel 101 , and the evaporator 800 is provided with an air exhaust channel 102 , and the air inlet channel 101 and the air exhaust channel 102 may or may not be connected. The way of communication is through the air duct 103 .

First, the gas medium enters the water circulation heat exchanger 400 through the air inlet channel 101 . The heat exchange between the gas medium and the water medium is carried out in the water circulation heat exchanger 400 , the water medium transfers heat to the gas medium, and the temperature of the gas medium is raised for the first time. The gaseous medium heated up for the first time enters the heat exchanger group 500 through the air pipe 103, and in the heat exchanger, the Freon medium transfers heat to the gaseous medium, and the gaseous medium is heated up for the second time. The gas medium after two times of heating enters the drying chamber 600 through the air duct 103, and the materials in the drying chamber 600 are dried. When the drying is completed, the gas medium discharged from the drying chamber 600 is dried for the first time. Cool down. Then through the air pipeline 103, it passes through the latent heat recovery device 700 and the evaporator 800 in sequence, completing the waste heat recovery of the gas medium for the first time and the waste heat recovery of the gas medium for the second time. Finally, it is discharged through the exhaust duct 102.

As shown in FIG. 9 , the internal circulation system 200 includes an evaporator 800 , a compressor 110 , a group of heat exchangers 500 , a condenser 120 and an expansion valve 130 which are sequentially communicated through a Freon pipeline 201 . "Sequentially cyclically connected" means connected from the beginning to the end according to the order described in the text. The way of communication is the working medium pipeline, which refers to the Freon pipeline 201 in this embodiment. The internal circulation system 200 continuously completes the thermodynamic cycle process of evaporation (absorbing heat from the outdoor environment), compression, condensation (releasing heat in the indoor drying room), throttling, and re-evaporation through the working medium. Among them, the working medium mainly adopts Freon in this embodiment.

The waste heat recovery of the second gas medium is completed in the evaporator 800 . The gas medium in the air heating system 100 releases heat when passing through the evaporator 800, and in the evaporator 800, the gas medium transfers waste heat to the Freon medium. The freon medium flows in the internal circulation system 200 under the action of the compressor 110, and it completes the process of increasing the pressure and temperature of the gaseous state in the compressor 110 (the temperature is as high as 100°C). In the heat exchanger group 500, the Freon medium releases high-temperature heat to the air medium, completing the second temperature rise of the air medium. At the same time, after passing through the condenser 120, the freon medium is cooled and transformed into a liquid state, and the freon medium releases heat to complete heat exchange with the water medium in the condenser 120, and the water medium in the condenser 120 absorbs the heat released by the freon medium. After the expansion valve 130 throttling and reducing the pressure, the liquid state quickly absorbs heat and evaporates and turns into a gaseous state again, and at the same time the temperature can drop to 15°C ~ -15°C. At this time, the recirculation passes through the evaporator 800 to absorb the heat of the air medium in the evaporator 800 . Therefore, the waste heat recovery of the air medium in the air heating system 100 is transferred to the heat exchanger group 500 in the air heating system 100 .

As shown in FIG. 10 , the water circulation system 300 mainly completes the recovery of waste heat in the air heating system 100 and the first heating of the air medium. At the same time, the recovery of the released heat in the internal circulation system 200 is also completed. The water circulation system 300 includes a water circulation heat exchanger 400 , a latent heat recovery device 700 and a condenser 120 which are sequentially connected in circulation through a water pipe 301 . "Sequentially cyclically connected" means connected from the beginning to the end according to the order described in the text. The way of communication is through the water pipe 301 .

The first waste heat recovery of the air medium is completed in the latent heat recovery device 700. In the latent heat recovery device 700, the air medium transfers the waste heat to the water medium, and the water medium after the temperature rise passes through the condenser 120, and the water medium absorbs Freon again and releases it. Finally, the recovered waste heat is transferred to the air medium through the water circulation heat exchanger 400 to complete the first temperature rise of the air medium, and the temperature of the water medium is lowered, and then circulated to the latent heat recovery device 700 to absorb the waste heat of the air medium. Thus forming a process of continuous heat absorption and release. Reach the cycle process of reusing the waste heat of the air medium.

Both the water circulation system 300 and the internal circulation system 200 can also include a waste heat recovery device 900, the waste heat recovery device 900 communicates with the condenser 120 and the water circulation heat exchanger 400 respectively through the water pipeline 301, and the waste heat recovery device 900 communicates with the condenser through the Freon pipeline 201 respectively. 120 communicates with the expansion valve 130, and the waste heat recovery device 900 can transfer the heat of the freon medium to the water medium. Setting the waste heat recovery device 900 is beneficial to realize the depressurization of the whole system. After the freon medium releases heat for the first time through the condenser 120 , it further absorbs heat through the waste heat recovery device 900 , which can effectively absorb the heat of the freon medium, thereby reducing the pressure of the freon pipeline 201 .

The setting of the water circulation system 300 cooperates with the internal circulation system 200 to realize two heating and two cooling of the air medium in the air heating system 100 . On the one hand, the temperature of the air medium can be further increased, the drying temperature of the gas medium can be increased, the drying speed and rate of the materials in the drying chamber 600 can be accelerated, and the drying quality of the dried materials can be improved. On the other hand, the two waste heat recovery can make full use of the waste heat of the air medium in the air heating system 100, which not only saves energy, but also effectively reduces the cycle pressure of the overall system, improves the drying efficiency and prolongs the working time of the whole device .

As shown in Figure 11, this embodiment also provides a heat pump drying machine room 140, including a machine room body 141, and an air heating system 100, an internal circulation system 200, and a water circulation system 300 are arranged in the machine room body 141, and the air heating system 100 includes air through The water circulation heat exchanger 400, the heat exchanger group 500, the drying chamber 600, the latent heat recovery device 700 and the evaporator 800 connected in sequence by the pipeline 103; the internal circulation system 200 includes the evaporator 800, the compressor and the 110. Heat exchanger group 500, condenser 120 and expansion valve 130; water circulation system 300 includes water circulation heat exchanger 400, latent heat recovery device 700 and condenser 120 which are sequentially circulated through water pipeline 301; water circulation heat exchanger 400 is provided with The air inlet channel 101, the evaporator 800 is provided with an exhaust channel 102; the water circulation heat exchanger 400 can transfer the heat of the water medium to the air medium, the heat exchanger group 500 can transfer the heat of the freon medium to the air medium, and the latent heat recovery device 700 can transfer the heat of the air medium to the water medium; the machine room body 141 includes a heating chamber 142 and an operating room, and the drying chamber 600 includes a plurality of drying bins 601, and the plurality of drying bins 601 are divided into two rows of drying bins 601, two A heat exchanger group 500 is arranged between the rows of drying bins 601, and the opposite sides of the two rows of drying bins 601 are respectively provided with a plurality of drying room doors, and each drying bin 601 is provided with a drying room door, The operating room is equipped with a machine room door. Except for the setting positions of the drying chamber 601 and the exchange chamber 501, other device structures can be reasonably arranged. The heating room 142 and the operating room are provided to facilitate unit management and be more suitable for industrial production.

As shown in Figure 12, this embodiment also provides a total heat pump drying cycle system, which includes a circulation pipe 104 and a total heat pump drying system, and the air inlet duct 101 and the exhaust duct 102 are connected through the circulation pipe 104 connected. The air heating system 100 completes the cycle heating process.

This embodiment also provides a heat pump drying cycle machine room, including a heat pump drying machine room 140, the air inlet duct 101 and the exhaust air duct 102 are connected through a circulation pipe 104, and the circulation pipe 104 is provided with a circulation exhaust fan. Through the arrangement of the circulation pipe 104, the air medium in the air heating system 100 can be continuously circulated and energy can be recycled. More energy efficient.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. a heat pump drying machine room, it is characterised in that include machine room body, be provided with in described machine room body air heating system, Internal circulation system and water circulation system, described air heating system includes that the water cycling hot being sequentially communicated by air line is exchanged Device, heat exchanger group, drying chamber, recovery of latent heat device and vaporizer；Described internal circulation system includes being depended on by freon pipeline Described vaporizer, compressor, described heat exchanger group, condenser and the expansion valve of secondary circulation connection；Described water circulation system bag Include and circulated the described water recycle heat exchanger of connection, described recovery of latent heat device and described condenser by waterpipe successively；Institute Stating water recycle heat exchanger and be provided with intake air way, described vaporizer is provided with exhausting duct；Described water recycle heat exchanger can be by The heat of aqueous medium passes to air dielectric, and the enough air that passed to by the heat of Freon medium of described heat exchanger group energy are situated between Matter, the heat of air dielectric can be passed to aqueous medium by described recovery of latent heat device；

Described machine room body includes that heating chamber and operating room, described drying chamber include multiple warehouse for drying, and multiple described warehouse for dryings divide Being warehouse for drying described in two rows, be provided with described heat exchanger group described in two rows between warehouse for drying, described in two rows, warehouse for drying is opposing Side be respectively arranged with multiple drying door, each described warehouse for drying arranges a described drying door, and described operating room sets It is equipped with machine room door.

Heat pump drying machine room the most according to claim 1, it is characterised in that described water circulation system and described interior cyclic system System the most also include waste-heat recovery device, described waste-heat recovery device by described waterpipe respectively with described condenser and described water Recycle heat exchanger connect, described waste-heat recovery device by described freon pipeline respectively with described condenser and described expansion Valve connects, and the heat of Freon medium can be passed to aqueous medium by described waste-heat recovery device.

Heat pump drying machine room the most according to claim 2, it is characterised in that described waste-heat recovery device includes waste heat recovery Casing, the inside of described waste heat recovery casing is disposed with the pipeline that spirals, described in the spiral two ends of pipeline return from described waste heat respectively Receive casing top stretch out and respectively with described freon pipeline communication；The bottom of described waste heat recovery casing is provided with into water Pipe, the top of described waste heat recovery casing is provided with outlet pipe, and described water inlet pipe connects with described condenser, described outlet pipe and Described water recycle heat exchanger connects.

Heat pump drying machine room the most according to claim 1, it is characterised in that described heat exchanger group includes that at least one is handed over Changing room, the top of described switch room is provided with freon outlet and multiple exchange air intake vents, and the bottom of described switch room is provided with Freon entrance and multiple be swapped out air port；Described switch room is internally provided with described freon pipeline, described freon pipe The one end in road connects with described freon entrance, the other end of described freon pipeline and described freon outlet；Described Exchange air intake vent is connected by described air line with described water recycle heat exchanger, described in be swapped out air port and described drying chamber Connected by described air line；Described freon entrance and described compressor are by described freon pipeline communication, described fluorine Leon outlet and described condenser are by described freon pipeline communication.

Heat pump drying machine room the most according to claim 4, it is characterised in that described switch room is internally provided with multiple dissipating Hot plate, the described freon pipe arrangement of inside in described switch room is between multiple described heat sinks.

Heat pump drying machine room the most according to claim 4, it is characterised in that described recovery of latent heat device includes collection box Body, the top of described recovery casing is provided with gas access, gas outlet and multiple water jet, and the bottom of described recovery casing sets Being equipped with drain pipe, the inside of described recovery casing is divided into sprinkling zone and is positioned at the hydrops region below described sprinkling zone, institute Stating sprinkling zone to be correspondingly arranged with multiple described water jets, described sprinkling zone is positioned at described gas access and described gas outlet Between；Described gas access is connected by described air line with described drying chamber, and described gas outlet leads to described vaporizer Cross the connection of described air line.

Heat pump drying machine room the most according to claim 6, it is characterised in that the top of described recovery casing is provided with water delivery Pipe and spraying mechanism, described water-supply-pipe connects with described spraying mechanism, and multiple described water jets are arranged at described spraying mechanism.

Heat pump drying machine room the most according to claim 7, it is characterised in that described drain pipe is provided with water pump.

Heat pump drying machine room the most according to claim 6, it is characterised in that vertically side, the inside of each described warehouse for drying To being arranged side by side multiple material frame, each described material frame horizontally set, the top of described warehouse for drying arranges drying air outlet, The bottom of described warehouse for drying arranges drying air intake vent；Described air line is passed through with described drying air intake vent in the described air port that is swapped out Connection, described drying air outlet is connected by described air line with described gas access.

10. a heat pump drying circulation machine room, it is characterised in that include in circulation pipe and claim 1 to 9 described in any one Heat pump drying machine room, connected by described circulation pipe between described intake air way and described exhausting duct, described circulation pipe is provided with Circulation air exhauster.