CN210486442U - Load-variable dehumidification heat pump drying system - Google Patents
Load-variable dehumidification heat pump drying system Download PDFInfo
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- CN210486442U CN210486442U CN201921221641.4U CN201921221641U CN210486442U CN 210486442 U CN210486442 U CN 210486442U CN 201921221641 U CN201921221641 U CN 201921221641U CN 210486442 U CN210486442 U CN 210486442U
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Abstract
The utility model relates to a become load dehumidification heat pump drying system, this system include high temperature heat pump subsystem and with the high temperature heat pump subsystem series connection become load degree of depth dehumidification subsystem, high temperature heat pump subsystem includes circulating fan, the driving of circulating fan forms the wind channel, is equipped with first evaporimeter and first condenser between the air intake to the air outlet in this wind channel in proper order, first evaporimeter and first condenser are formed the hot medium circulation by the first compressor drive; the variable-load deep dehumidification subsystem comprises a second evaporator and a second condenser, the second evaporator and the second condenser are sequentially connected in series between the first evaporator and the first condenser, and the second evaporator and the second condenser are driven by a second compressor to form a heat medium circulation. The utility model discloses can multistage cooling dehumidification and multistage heating, carry out the degree of depth dehumidification, provide the highest air feed temperature simultaneously, two system adaptability and regulation nature are good, and the homoenergetic is at best, the most efficient work interval work.
Description
Technical Field
The utility model relates to a become load dehumidification heat pump drying-machine technical field, concretely relates to become load dehumidification heat pump drying system.
Background
The heat pump dryer is widely applied to drying of medicinal materials, food, agricultural products, electronic products and the like, and has the advantages of energy conservation, environmental protection, quick drying, low-temperature drying and the like. However, the heat pump drying equipment is mainly used for heating at present, but the heating temperature is generally not high. The drying system can not be used for dehumidification, and once the external relative humidity changes, the moisture content of the air inlet of the drying system can be greatly influenced, so that the drying effect is greatly influenced, and the drying speed is reduced. The current dehumidification method usually adopts an independent dehumidification system, and the disadvantages thereof are mainly reflected in: the dehumidification capacity of the fresh air dehumidification is insufficient or the load change is too large, the energy consumption is high, the unit configuration is difficult, the working condition change coping capacity is weak, a large amount of condensation heat is directly discharged in the dehumidification process, and the energy consumption is high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the problem that prior art exists, provide a variable load dehumidification heat pump drying system to solve dehumidification problem, energy-conserving heating problem, the difficult preparation of unit, condensation heat recycle problem, improve drying efficiency, reduce energy consumption, improve equipment reliability.
For realizing above-mentioned technical purpose, reach above-mentioned technological effect, the utility model discloses a following technical scheme realizes:
a variable load dehumidification heat pump drying system comprises a high-temperature heat pump subsystem and a variable load deep dehumidification subsystem connected with the high-temperature heat pump subsystem in series, wherein:
the high-temperature heat pump subsystem comprises a circulating fan, the circulating fan is driven to form an air channel, a first evaporator and a first condenser are sequentially arranged between an air inlet and an air outlet of the air channel, the first evaporator and the first condenser are driven by a first compressor to form hot medium circulation, and cooling and heating are respectively carried out;
the variable-load deep dehumidification subsystem comprises a second evaporator and a second condenser, the second evaporator and the second condenser are sequentially connected in series between the first evaporator and the first condenser, and the second evaporator and the second condenser are driven by a second compressor to form a heat medium circulation to be cooled and heated respectively.
Furthermore, an enthalpy increasing system is arranged in the high-temperature heat pump subsystem, the enthalpy increasing system comprises an intermediate heat exchanger and a second expansion valve, a liquid inlet of the first evaporator is communicated with a liquid outlet of the liquid storage device through a first expansion valve and a first flow channel in the intermediate heat exchanger, a liquid inlet of the liquid storage device is communicated with a liquid outlet of the first condenser, an air inlet of the first condenser is communicated with an air inlet/outlet of the first compressor, and another air inlet/outlet of the first compressor is communicated with an air outlet of the first evaporator.
Further, a liquid outlet of the liquid storage device is communicated with an air inlet of the first compressor through a second expansion valve and a second flow passage in the intermediate heat exchanger.
Furthermore, one air inlet/outlet of the second compressor is communicated with the air outlet of the second evaporator, the other air inlet/outlet of the second compressor is communicated with the air inlet of the second condenser, and the liquid outlet of the second condenser is communicated with the liquid inlet of the second evaporator through a third expansion valve.
Furthermore, the second compressor is a variable load compressor, and a load regulating valve is connected in parallel between two air inlet/outlet ports of the second compressor and used for regulating the output of the second compressor.
The utility model has the advantages that:
the utility model discloses can multistage cooling dehumidification and multistage heating, two system collaborative work of make full use of reach the purpose of degree of depth dehumidification, provide the highest air supply temperature simultaneously, and the highest evaporating temperature can reach 40 ℃, and the condensation temperature can reach more than 85 ℃, and two system adaptability and regulation nature are good simultaneously, and the homoenergetic is at best, the most efficient work interval work.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The reference numbers in the figures illustrate: A. the system comprises an oven, a B air inlet, a C first evaporator, a D second evaporator, an E second condenser, a F circulating fan, a G oven air outlet, a H oven air inlet, an I reservoir, a J intermediate heat exchanger, a K first expansion valve, a L second expansion valve, a M first compressor, a N first condenser, an O water outlet, a P water collecting disc, a Q third expansion valve, a R second compressor, a S load adjusting valve.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1, a variable load dehumidification heat pump drying system includes a high temperature heat pump subsystem and a variable load deep dehumidification subsystem connected in series with the high temperature heat pump subsystem, in this embodiment, further includes an oven a, wherein:
the high-temperature heat pump subsystem comprises a circulating fan F, the circulating fan F is driven to form an air duct, a first evaporator C and a first condenser N are sequentially arranged between an air inlet B and an air outlet of the air duct, the air outlet of the air duct is communicated with an air inlet H of the drying oven, the air is exhausted from an air outlet G of the drying oven after passing through the drying oven A, the first evaporator C and the first condenser N are driven by a first compressor M to form heat medium circulation to be cooled and heated respectively, when the first compressor M works, the heat medium is driven to be liquefied and released in the first condenser N, the heat medium is driven to be vaporized and absorbed in the first evaporator C, and the heat medium is circulated through a corresponding pipeline;
the variable-load deep dehumidification subsystem comprises a second evaporator D and a second condenser E, the second evaporator D and the second condenser E are sequentially connected in series between a first evaporator C and a first condenser N, the second evaporator D and the second condenser E are driven by a second compressor R to form a heat medium circulation to be cooled and heated respectively, when the second compressor R works, the heat medium is driven to be liquefied and released heat in the second condenser E, the heat medium is driven to be evaporated and absorbed heat in the second evaporator D, and the heat medium is enabled to be circulated through a corresponding pipeline.
The system is characterized in that an enthalpy increasing system is arranged in the high-temperature heat pump subsystem, the enthalpy increasing system comprises an intermediate heat exchanger J and a second expansion valve L, a liquid inlet of the first evaporator C is communicated with a liquid outlet of a liquid storage device I through a first expansion valve K and a first flow channel in the intermediate heat exchanger J, a liquid inlet of the liquid storage device I is communicated with a liquid outlet of a first condenser N, an air inlet of the first condenser N is communicated with an air inlet/outlet of a first compressor M, and another air inlet/outlet of the first compressor M is communicated with an air outlet of the first evaporator C.
A liquid outlet of the liquid reservoir I is communicated with an air inlet of the first compressor M through a second expansion valve L and a second flow passage in the intermediate heat exchanger J, in the embodiment, a first flow passage and a second flow passage in the intermediate heat exchanger J are arranged in an isolated mode in a heat transfer and mass transfer free mode, and the gas/liquid flowing directions in the first flow passage and the second flow passage are opposite; the liquid storage device I stores the refrigerant, the charging amount is adjusted, the refrigerant liquid coming out of the liquid storage device I is divided into two paths, one path of refrigerant liquid flows through the second expansion valve L and the intermediate heat exchanger J, the heat of the other path of refrigerant flowing through the intermediate heat exchanger J is absorbed, the other path of refrigerant liquid is equivalently cooled again, the heat is absorbed and then changed into refrigerant vapor, the refrigerant vapor enters the first compressor M, the suction temperature of the first compressor M is increased, the exhaust temperature of the compressor M is finally increased, and therefore the heat supply temperature of the whole high-temperature heat pump subsystem is increased.
And one air inlet/outlet of the second compressor R is communicated with the air outlet of the second evaporator D, the other air inlet/outlet of the second compressor R is communicated with the air inlet of the second condenser E, and the liquid outlet of the second condenser E is communicated with the liquid inlet of the second evaporator D through a third expansion valve Q.
In this embodiment, a water collecting tray (P) is disposed below the first evaporator C and the second evaporator D for collecting condensed water condensed from moisture in the air, and a drain outlet (O) is disposed at the bottom of the water collecting tray (P) for draining the condensed water.
The second compressor R is a variable load compressor, in this embodiment, a digital scroll compressor is adopted, and a load adjusting valve S is connected in parallel between two air inlet/outlet ports of the second compressor R for adjusting the output of the second compressor R.
The working process and principle of the utility model
In the utility model, fresh air enters the system from the air inlet B, is cooled by the first evaporator C and is cooled again by the second evaporator D to reach the required lower absolute moisture content, and then flows through the second condenser E and the first condenser N to be heated step by step, the temperature is gradually increased to the required temperature, and the fresh air enters the oven A to dry the material under the driving of the circulating fan F, and then the waste air is discharged out of the oven A through the air outlet G;
when the temperature of the inlet air is too low, the heating effect of the first condenser N can be influenced, the enthalpy increasing system of the utility model can increase the air suction temperature of the first compressor M and finally increase the exhaust temperature of the compressor M, thereby increasing the heat supply temperature of the whole high-temperature heat pump subsystem and ensuring that the system can operate at low temperature;
when the air inlet load changes, the load adjusting valve S is adjusted, so that the output capacity of the second compressor R is changed, the refrigeration and dehumidification load of the system is adjusted, the system is ensured not to be frozen, the continuous operation can be realized, and the stable air supply condition is kept.
In addition, it should be noted that the terms "first", "second", "third", and the like in the specification are used for distinguishing various components, elements, steps, and the like in the specification, and are not used for indicating a logical relationship or a sequential relationship between the various components, elements, steps, and the like, unless otherwise specified or indicated.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a become load dehumidification heat pump drying system, its characterized in that, this system includes high temperature heat pump subsystem and with the high temperature heat pump subsystem series connection become load degree of depth dehumidification subsystem, wherein:
the high-temperature heat pump subsystem comprises a circulating fan (F), the circulating fan (F) is driven to form an air channel, a first evaporator (C) and a first condenser (N) are sequentially arranged between an air inlet (B) and an air outlet of the air channel, and the first evaporator (C) and the first condenser (N) are driven by a first compressor (M) to form a heat medium cycle for cooling and heating respectively;
the variable-load deep dehumidification subsystem comprises a second evaporator (D) and a second condenser (E), the second evaporator (D) and the second condenser (E) are sequentially connected in series between the first evaporator (C) and the first condenser (N), and the second evaporator (D) and the second condenser (E) are driven by a second compressor (R) to form a heat medium circulation to be cooled and heated respectively.
2. The system of claim 1, wherein an enthalpy increasing system is disposed in the high-temperature heat pump subsystem, the enthalpy increasing system includes an intermediate heat exchanger (J) and a second expansion valve (L), an inlet of the first evaporator (C) is communicated with an outlet of the accumulator (I) through a first expansion valve (K) and a first flow channel of the intermediate heat exchanger (J), an inlet of the accumulator (I) is communicated with an outlet of the first condenser (N), an inlet of the first condenser (N) is communicated with an inlet/outlet of the first compressor (M), and another inlet/outlet of the first compressor (M) is communicated with an outlet of the first evaporator (C).
3. A variable load dehumidification heat pump drying system according to claim 2, wherein the liquid outlet of the reservoir (I) is connected to the inlet of the first compressor (M) through a second expansion valve (L) and a second flow path in the intermediate heat exchanger (J).
4. A variable-load dehumidifying heat pump drying system as claimed in claim 1 or 3, wherein an air inlet/outlet of the second compressor (R) is connected to an air outlet of the second evaporator (D), another air inlet/outlet of the second compressor (R) is connected to an air inlet of the second condenser (E), and an air outlet of the second condenser (E) is connected to an air inlet of the second evaporator (D) through the third expansion valve (Q).
5. A variable load dehumidifying heat pump drying system as claimed in claim 4, wherein said second compressor (R) is a variable load compressor, and a load regulating valve (S) is connected in parallel between two inlet/outlet ports of said second compressor (R) for regulating the output of the second compressor (R).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201921221641.4U CN210486442U (en) | 2019-07-31 | 2019-07-31 | Load-variable dehumidification heat pump drying system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921221641.4U CN210486442U (en) | 2019-07-31 | 2019-07-31 | Load-variable dehumidification heat pump drying system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360833A (en) * | 2019-07-31 | 2019-10-22 | 苏州海派特热能设备有限公司 | A kind of varying duty dehumidifying heat pump drying system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360833A (en) * | 2019-07-31 | 2019-10-22 | 苏州海派特热能设备有限公司 | A kind of varying duty dehumidifying heat pump drying system |
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