CN213066798U - Closed-loop heat pump constant-temperature dryer system - Google Patents
Closed-loop heat pump constant-temperature dryer system Download PDFInfo
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- CN213066798U CN213066798U CN202021729309.1U CN202021729309U CN213066798U CN 213066798 U CN213066798 U CN 213066798U CN 202021729309 U CN202021729309 U CN 202021729309U CN 213066798 U CN213066798 U CN 213066798U
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Abstract
The utility model particularly relates to a closed loop heat pump constant temperature drying-machine system. The air-conditioning system comprises a case, an air return inlet, an evaporator, a condenser and an air supply outlet which are sequentially communicated and form an air return loop, a compressor, a condenser, a throttling device and an evaporator which are sequentially communicated and form a refrigerant loop, and a control assembly, wherein a water side heat exchanger is arranged on the outlet side of the compressor, the water side heat exchanger is provided with a water inlet and a water outlet which are communicated with an external water source, a water inlet valve is arranged on the water inlet side, and the water side heat exchanger is controlled to start and stop by the water inlet valve, so that the temperature of a constant drying room is a preset value. The utility model provides a thermostatic regulation mode realizes the complicated problem of temperature regulation and control through switching refrigerant circulation among a plurality of condensers to the correlation technique, through the heat supply of addding water side heat exchanger bypass stoving room, and only need opening of control water intaking valve to stop can carry out accurate control to the temperature in stoving room, and control is simple, and can effectively utilize unnecessary condensation heat, and a tractor serves several purposes is more energy-conserving.
Description
Technical Field
The utility model relates to a heat pump stoving technical field, concretely relates to closed loop heat pump constant temperature drying-machine system.
Background
The traditional flue-cured tobacco curing process and the technical target mostly focus on the appearance quality of tobacco leaves, mainly two aspects of yellowing and drying. The traditional flue-cured tobacco is mostly baked by coal, and because the application of air energy heat pump drying is more and more extensive, the flue-cured tobacco is also gradually introduced with heat pump drying, so that the flue-cured tobacco is environment-friendly and energy-saving. The air source heat pump flue-cured tobacco is changed from appearance quality to internal quality improvement on the basis of the goals of tobacco leaf yellowing and drying, reduces the content of macromolecular substances such as starch, protein, chlorophyll, polyphenol and cembrane substances in the tobacco leaf, improves the quality of the tobacco leaf, improves the industrial availability of the tobacco leaf and plays a positive role.
The existing heat pump flue-cured tobacco has advantages and disadvantages for flue-cured tobacco application due to the fact that an open-loop machine, a closed-loop machine and an opening-closing integrated machine are used, temperature and humidity control is strictly required in each stage of flue-cured tobacco, and the open-loop temperature is stable, but the humidity of the dried tobacco leaves is mainly controlled by humidity discharge and is not accurately controlled; the closed-loop drying system mainly controls humidity, and has the problems of unstable temperature of a curing barn and constant temperature rise; the temperature and the humidity of the opening and closing integrated machine can be realized by switching into an open loop or a closed loop, but the refrigerant circulation switching between systems is complex, and the equipment cost investment is also high.
Disclosure of Invention
The utility model discloses to current closed loop heat pump drying-machine curing barn temperature unstability, the problem that influences the tobacco leaf stoving quality of continuously rising temperature provides a closed loop heat pump constant temperature drying-machine system that can steady temperature accuse is wet.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a closed loop heat pump constant temperature drying-machine system, includes quick-witted case, communicates in proper order and forms return air inlet, evaporimeter, condenser and the supply-air outlet of return air loop, and communicates in proper order and form compressor, condenser, throttling arrangement and the evaporimeter of refrigerant loop, and control connection the control assembly of return air loop and refrigerant loop, the supply-air outlet side is equipped with centrifugal fan, water side heat exchanger is installed to the outlet side of compressor, water side heat exchanger has water inlet and the delivery port with outside water source intercommunication, just the water inlet side sets up the water intaking valve, controls through the intake valve opening and shutting of water side heat exchanger to invariable stoving room temperature is a default.
Furthermore, the refrigerant loops comprise a plurality of groups which are arranged in parallel, and each group of refrigerant loops are communicated with the same condenser core body.
Furthermore, the water side heat exchanger is provided with an air inlet and an air outlet corresponding to the multiple groups of refrigerant loops respectively.
Furthermore, the refrigerant loop also comprises a gas-liquid separator arranged on the inlet side of the compressor, and a liquid reservoir and a filter which are sequentially arranged on the outlet side of the condenser, wherein the outlet side of the filter is communicated with an expansion valve throttling device.
Further, a water outlet of the water side heat exchanger is communicated with a heat storage water tank.
Furthermore, a sensible heat exchanger for cross heat exchange between hot air at the air return port side and cold air at the outlet side of the evaporator is further arranged on the air return loop.
Further, the return air port side has a branch that bypasses to the outlet side of the sensible heat exchanger.
Further, a single group or multiple groups of electric heaters are arranged on the outlet side of the condenser.
Furthermore, the evaporator and the condenser are both fin type heat exchangers.
The utility model adopts the above technical scheme, following beneficial effect has at least: the outlet side of the water side heat exchanger is communicated to the condenser, the water side heat exchanger is provided with a water inlet and a water outlet which are communicated with an external water source, and the water inlet end is provided with a water inlet valve, so that the following constant temperature regulation process is realized: when the temperature and the humidity of the drying room do not reach preset values, the water inlet valve is in a closed state, the water side heat exchanger does not exchange heat with an external water source, and pure closed-loop dehumidification is performed; when the temperature of the drying room reaches a preset value and the humidity does not reach the preset value, the control assembly controls the water inlet valve to be opened, the water side heat exchanger recovers part of condensation heat through an external water source, and meanwhile, the drying room keeps normal dehumidification work, so that the purpose of temperature stabilization and humidity control is achieved; when the temperature in the drying room is reduced, closing the water inlet valve and recovering the pure closed-loop dehumidification operation; when the humiture in the stoving room all reaches the default, the system is in standby state. This constant temperature regulation mode realizes the complicated problem of temperature regulation and control through switching refrigerant circulation among a plurality of condensers to the correlation technique, through the heat supply of addding water side heat exchanger bypass stoving room, and only need control opening of water intaking valve to open and stop can carry out accurate control to the temperature in stoving room, and control is simple, and can effectively utilize unnecessary condensation heat, and a tractor serves several purposes is more energy-conserving.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, the following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings.
It should be noted that the terms "first" and "second" are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The utility model discloses a closed loop heat pump constant temperature drying-machine system, assemble in the confined stoving room outside, be used for to the stoving room inner loop carry hot-blastly, with the material to in the stoving room dehumidify and dry, the flue-cured tobacco baking process in the industry is mainly applied to, satisfy the tobacco leaf dry yellowing stage, the humiture requirement in stationary phase and dry muscle period, the tobacco leaf colour golden yellow of stoving and even unanimity, the oil content is sufficient, fragrant smell is good, tobacco leaf starch, protein, chlorophyll, macromolecular substance content such as polyphenol and western asphalt alkane descends, effectively improve flue-cured tobacco fragrance, improve the tobacco leaf rate of putting on the market. The heat pump dryer system is provided with a water side heat exchanger 50 as an auxiliary condenser and is connected to the inlet side of the condenser 20 in series, on one hand, the start and stop of the heat pump dryer system are controlled by a water inlet valve on the water inlet side of the water side heat exchanger 50, when the temperature reaches a preset value, part of condensation heat is recovered, and the temperature in a constant drying room is a preset value; on the other hand, the recovered condensation heat is collected through the heat storage water tank, so that hot water is obtained, and the device is efficient and energy-saving. Moreover, through the multiple groups of refrigerant loops arranged in parallel, each group of refrigerant loops are communicated with the same heat exchanger core, the condenser core and the evaporator core, the structure is compact, the control is simple and convenient, meanwhile, the multiple groups of compressors 10 and the expansion valve throttling devices 30 share the refrigerant, the multi-stage control of the refrigerant flux is realized, and the diversified requirements of the system are met; in addition, the sensible heat exchanger 60 is arranged to improve the heat exchange efficiency of the return air loop, and the multiple groups of electric heaters 80 are additionally arranged to further improve the adjustability of the temperature of the drying room.
Referring to fig. 1, a closed-loop heat pump constant temperature dryer system according to an embodiment of the present application includes a chassis, a return air loop, a refrigerant loop, and a control component for controlling and connecting the return air loop and the refrigerant loop. The case is provided with an air return inlet and an air supply outlet which are communicated with the drying room, and the side of the air supply outlet is provided with a centrifugal fan 90.
The return air loop comprises a return air inlet, an evaporator 40, a condenser 20 and an air supply outlet which are sequentially communicated, wherein the evaporator 40 is installed corresponding to the return air inlet and used for condensing and dehumidifying damp and hot air flowing in from the return air inlet end, and the condenser 20 is installed corresponding to the air supply outlet and used for heating the air flowing to the air supply outlet after dehumidification. The air return loop is also provided with a sensible heat exchanger 60 for cross heat exchange between hot air at the air return port side and cold air at the outlet side of the evaporator 40, so that the air before entering the evaporator is close to the saturated dew point temperature, and the dehumidification efficiency of the evaporator 40 is effectively improved. Three groups of electric heaters 80 are arranged on the outlet side of the condenser 20, and the electric heating can be determined according to the temperature of the drying room. In another preferred embodiment, the air return side has a branch that bypasses to the outlet side of the sensible heat exchanger 60, and the air return side hot air is divided into two paths, one path passes through the sensible heat exchanger 60, the evaporator 40 in sequence, and then flows out of the sensible heat exchanger 60; the two paths are sucked to the branch circuit through the centrifugal fan 90, mixed with one path of air flow after flowing out, and then enter the condenser 20 for heating, so that the air supply amount is increased, and the heat exchange efficiency of the condenser 20 is improved.
The specific dehumidification process of the return air loop is as follows: the hot and humid air flowing out of the drying room is subjected to cross heat exchange with the cold side air entering the sensible heat exchanger 60 through the hot side of the sensible heat exchanger 60, and then is subjected to heat exchange and condensation with the low-temperature refrigerant inside the evaporator 40, when the hot and humid air is condensed, the moisture in the hot and humid air is condensed and attached to the inner surface of the evaporator 40, and the evaporator 40 discharges the separated condensed water, so that the moisture in the air is removed, and the drying and dehumidification of the air are realized. The low-temperature gas cooled and dried by the evaporator 40 enters the air at the hot side of the sensible heat exchanger 60 through the cold side of the sensible heat exchanger 60 to exchange heat and raise the temperature, then is heated to the required temperature through the condenser 20 and/or the electric heater 80, the obtained high-temperature low-humidity hot air is blown by the centrifugal fan 90 and is conveyed to the drying room through the air supply outlet in a balanced manner, the damp-hot air generated after the materials in the drying room absorb heat and raise the temperature returns to the air return inlet, and the process is circulated continuously so as to take away the moisture in the drying room, thereby achieving the drying and dehumidifying effects.
The refrigerant loop includes a gas-liquid separator 71, a compressor 10, a water-side heat exchanger 50, the condenser 20, a reservoir 72, a filter 73, an expansion valve throttling device 30, and the evaporator 40, which are sequentially communicated. The gas-liquid separator 71 is used for separating gaseous refrigerants; the compressor 10 compresses a refrigerant; the water side heat exchanger 50 is used for recovering redundant condensation heat, and is provided with a water inlet and a water outlet which are communicated with an external water source, a water inlet valve is arranged on the water inlet side, the start and stop of the water side heat exchanger 50 are controlled through the water inlet valve, so that the temperature of the drying room is kept at a preset value, a heat storage water tank is communicated on the water outlet side and is used for storing hot water, and the drying room is multifunctional and saves more energy; the expansion valve throttling device 30 is used for throttling and depressurizing the refrigerant.
The circulation process of the refrigerant is described in detail as follows: the system is pre-filled with a refrigerant for transferring heat, the gas-liquid separator 71 separates a gaseous refrigerant, the gaseous refrigerant is compressed by the compressor 10 and then outputs a high-temperature high-pressure gaseous refrigerant, the gaseous refrigerant is subjected to auxiliary condensation by the water side heat exchanger 50, then enters the condenser 20 to release heat, heats air in the drying room, is condensed to form a high-pressure medium-temperature liquid refrigerant, sequentially flows through the liquid reservoir 72 and the filter 73, enters the expansion valve throttling device 30 to be throttled and decompressed to form a low-temperature low-pressure liquid refrigerant, then enters the evaporator 40 to be subjected to heat exchange with return air and vaporized into a low-temperature low-pressure gaseous refrigerant, and flows back to the gas-liquid separator 71.
The following is a detailed description of the temperature and humidity stabilizing implementation process of the water-side heat exchanger: when the temperature and the humidity of the drying room do not reach preset values, the water inlet valve is in a closed state, the water side heat exchanger 50 does not exchange heat with an external water source, and pure closed-loop dehumidification is performed; when the temperature of the drying room reaches a preset value and the humidity does not reach the preset value, the control assembly controls the water inlet valve to be opened, the water side heat exchanger 50 recovers part of condensation heat through an external water source, and meanwhile, the drying room keeps normal dehumidification work, so that the purpose of temperature stabilization and humidity control is achieved; when the temperature in the drying room is reduced, closing the water inlet valve and recovering the pure closed-loop dehumidification operation; when the humiture in the stoving room all reaches the default, the system is in standby state.
Preferably, the refrigerant loops comprise a plurality of groups which are arranged in parallel, and each group of refrigerant loops is communicated with the core body of the heat exchanger at the same water side, the core body of the condenser and the core body of the evaporator. The water side heat exchanger 50 is provided with an air inlet and an air outlet corresponding to the multiple groups of refrigerant loops respectively; the condenser 20 is provided with a gaseous refrigerant inlet and a liquid refrigerant outlet corresponding to the plurality of refrigerant loops. The refrigerant is uniformly distributed into each group of refrigerant loops, the refrigerant flux between the evaporator 40 and the condenser 20 is controlled by controlling the on-off of the compressor 10 and the expansion valve throttling device 30, so that the heat exchange capacity of the evaporator 40 and the condenser 20 is controlled, the drying requirements of different types of materials or different total material amounts are met, and the refrigerant circulating system has the advantages of simplicity and convenience in control and compact structure.
Preferably, the evaporator 40 and the condenser 20 are both fin-type heat exchangers, which can increase air flow disturbance and improve heat exchange energy efficiency.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which are within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (9)
1. The utility model provides a closed loop heat pump constant temperature drying-machine system, includes quick-witted case, communicates in proper order and forms return air inlet, evaporimeter (40), condenser (20) and the supply-air outlet of return air loop, and communicates in proper order and forms compressor (10), condenser (20), throttling arrangement and evaporimeter (40) of refrigerant loop, and control connection the control assembly of return air loop and refrigerant loop, the supply-air outlet side is equipped with centrifugal fan (90), its characterized in that, water side heat exchanger (50) is installed to the outlet side of compressor (10), water side heat exchanger (50) have with the water inlet and the delivery port of outside water source intercommunication, just water inlet side sets up the water intaking valve, controls through the start-stop of water side heat exchanger (50) to invariable stoving room temperature is a default.
2. The closed-loop heat pump constant temperature dryer system of claim 1, wherein the refrigerant loops comprise multiple sets arranged in parallel, and each set of refrigerant loops is in communication with a same condenser core.
3. The closed-loop heat pump constant-temperature dryer system as claimed in claim 2, wherein the water side heat exchanger (50) is provided with an air inlet and an air outlet corresponding to multiple groups of refrigerant loops respectively.
4. A closed-loop heat pump thermostatic dryer system as claimed in any one of claims 1-3 wherein said refrigerant loop further comprises a gas-liquid separator (71) mounted on an inlet side of said compressor (10), and a reservoir (72) and a filter (73) mounted in sequence on an outlet side of said condenser (20), an outlet side of said filter (73) being in communication with an expansion valve throttling device (30).
5. A closed-loop heat pump constant-temperature dryer system as claimed in claim 1, characterized in that the water outlet of the water side heat exchanger (50) is communicated with a heat storage water tank.
6. A closed loop heat pump constant temperature dryer system as claimed in claim 1, wherein a sensible heat exchanger (60) is further disposed on the air return loop for cross heat exchange between hot air at the air return port side and cold air at the outlet side of the evaporator (40).
7. A closed loop heat pump thermostatic dryer system as set forth in claim 6 wherein said return air port side has a bypass to the outlet side of said sensible heat exchanger (60).
8. A closed loop heat pump thermostatic dryer system as claimed in claim 1 wherein a single set or multiple sets of electric heaters (80) are provided on the outlet side of the condenser (20).
9. A closed loop heat pump thermostatic dryer system as claimed in claim 1 wherein both the evaporator (40) and the condenser (20) are finned heat exchangers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021729309.1U CN213066798U (en) | 2020-08-18 | 2020-08-18 | Closed-loop heat pump constant-temperature dryer system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021729309.1U CN213066798U (en) | 2020-08-18 | 2020-08-18 | Closed-loop heat pump constant-temperature dryer system |
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| CN213066798U true CN213066798U (en) | 2021-04-27 |
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| CN202021729309.1U Active CN213066798U (en) | 2020-08-18 | 2020-08-18 | Closed-loop heat pump constant-temperature dryer system |
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Address after: 323000 No.96 Yunjing Road, Shuige Industrial Park, Lishui City, Zhejiang Province Patentee after: Zhejiang Zhongguang Electric Appliance Group Co.,Ltd. Address before: 323000 No.96 Yunjing Road, Shuige street, Liandu District, Lishui City, Zhejiang Province Patentee before: ZHEJIANG ZHONGGUANG ELECTRIC APPLIANCES Co.,Ltd. |