CN209588445U - Heat pump system and heat pump drying device - Google Patents
Heat pump system and heat pump drying device Download PDFInfo
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- CN209588445U CN209588445U CN201920274770.3U CN201920274770U CN209588445U CN 209588445 U CN209588445 U CN 209588445U CN 201920274770 U CN201920274770 U CN 201920274770U CN 209588445 U CN209588445 U CN 209588445U
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- 238000001035 drying Methods 0.000 title claims abstract description 90
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000005057 refrigeration Methods 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims description 91
- 239000003507 refrigerant Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 21
- 238000009835 boiling Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 abstract description 33
- 238000007791 dehumidification Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 14
- 230000008569 process Effects 0.000 description 8
- 238000010257 thawing Methods 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010725 compressor oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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Abstract
The utility model provides a heat pump system and heat pump drying device, heat pump system includes: a first refrigeration cycle system; a second refrigeration cycle system; the first refrigeration cycle system can be separately turned on at a temperature Tin > T1 in the dry room, at which time the second refrigeration cycle system can be turned off; the second refrigeration cycle can be separately turned on at a temperature Tin < T2 in the dry room, at which time the first refrigeration cycle can be turned off; the first refrigeration cycle system and the second refrigeration cycle system can be simultaneously turned on when the temperature T2 ≦ Tin ≦ T1 in the drying room, wherein T1> T2. Through the utility model discloses can combine together through single-stage heat pump circulation and the switching of overlapping heat pump circulation, open heating and closed dehumidification mode, realize the dry whole high-efficient operation of heat pump.
Description
Technical field
The utility model belongs to technical field of heat pumps, and in particular to a kind of heat pump system and heat pump drying device.
Background technique
When carrying out dry materials using heat pump techniques, if drying temperature is higher than 80 DEG C, using regular air source heat pump (CO2
Except heat pump) it cannot achieve efficient operation under big temperature rise, it is generally recycled at this time using autocascade cycle or multi-stage compression.Overlapping heat
Pump is connected two heat pump systems by condenser/evaporator, and in the case where meeting big temperature condition, high heat supply temperature demand is same
When, solve the problems such as multi-stage compression system difficult design that may be present, compressor oil equalization is difficult.Patent CN103940156B gives
The control method for having gone out a kind of overlapping Analysis of Heat Pump Drying System determines system running pattern by detecting environment temperature.But this is
The efficient operation of system when system does not take into account different dry room temperatures is not taken into account desiccant dehumidification section yet and is dehumidified using evaporator
Dehumidifying energy consumption can be significantly reduced；Meanwhile the patent proposes to run when environment temperature is higher using high-temperature level single-stage, this is dry
The high occasion of dry temperature requirement will be unable to operate normally.
Since Analysis of Heat Pump Drying System in the prior art is same in the presence of that can not be dried for different dry room temperatures
When also ensure the efficient operation of system, dehumidifying energy consumption can not be reduced；High-temperature level list is used when environment temperature is higher simultaneously
Grade operation, this will be unable to the technical problems such as normal operation in the demanding occasion of drying temperature, therefore the utility model research is set
Count out a kind of heat pump system and heat pump drying device.
Utility model content
Therefore, the technical problem to be solved by the present invention is to overcome Analysis of Heat Pump Drying System in the prior art to there is heat
Pump drying system is in the presence of the efficient operation for also ensuring system while can not being dried for different dry room temperatures
Defect, to provide a kind of heat pump system and heat pump drying device.
The utility model provides a kind of heat pump system, can be used in the dry materials in drying shed comprising:
First cooling cycle system, including the first compressor, the first condenser, the first evaporator and heat exchanger, it is described
Heat exchanger, which is arranged in parallel, fills the first refrigerant in the both ends of first evaporator, first cooling cycle system；
Second cooling cycle system, including the second compressor, the second condenser, the second evaporator and the heat exchanger,
The heat exchanger is arranged in parallel at the both ends of second condenser, and first cooling cycle system and second refrigeration
The circulatory system is exchanged heat by the heat exchanger, fills second refrigerant in second cooling cycle system；
First cooling cycle system can individually be opened in temperature Tin > T1 in dry room, is described at this time
Second cooling cycle system can be closed；Second cooling cycle system can be in the temperature Tin < T2 in dry room
When by it is independent open, first cooling cycle system can be closed at this time；First cooling cycle system and described
Two cooling cycle systems can be opened simultaneously in temperature T2≤Tin≤T1 in dry room, wherein T1 > T2.
Preferably,
When first cooling cycle system is individually opened, the heat exchanger does not work, first evaporator and institute
State the first condenser working；
When second cooling cycle system is individually opened, the heat exchanger does not work, second evaporator and institute
State the second condenser working；
When first cooling cycle system and second cooling cycle system are opened simultaneously, the heat exchanger work
Make, first evaporator does not work, second condenser does not work.
Preferably,
Branch where first evaporator is the first branch, and the first control valve is provided in the first branch；
Branch in first cooling cycle system, where the heat exchanger is second branch, and is provided in the second branch
Second control valve, the first branch are in parallel with the second branch.
Preferably,
Branch where first condenser is third branch, and the first cooling cycle system further includes and the third
4th branch of branch circuit parallel connection setting, and the 4th road is provided with auxiliary condenser, and the 4th road is also set
It is equipped with third control valve and first throttle valve；The third branch and the 4th branch converge after with the first branch and the
Second throttle is provided between before two branch branches.
Preferably,
Branch where second condenser is the 5th branch, and the 5th road is provided with the 4th control valve,
Branch in second cooling cycle system, where the heat exchanger is the 6th branch, and the 6th road is provided with
5th control valve, the 5th branch and the 6th branch circuit parallel connection.
Preferably,
Branch where second evaporator is the 7th branch, and the 7th road is provided with third throttle valve and the
Six control valves, and the heat pump system further includes the 8th branch, one end of the 8th branch is connected to second compressor
Exhaust end, the other end be connected between the 6th control valve and the third throttle valve, and it is described 8th road be arranged
There is the 7th control valve.
Preferably,
Further include the 9th branch with the 7th branch circuit parallel connection setting, and is additionally provided with auxiliary on the 9th road
Heater, the 9th road are additionally provided with the 4th throttle valve and the 8th control valve；9th branch and 7th described
The 9th control valve is additionally provided between road.
The utility model also provides a kind of heat pump drying device comprising preceding described in any item heat pump systems further include
Drying shed, the heat pump system can be to being heated and/or dehumidified in the drying shed.
Preferably,
It further include the air duct in the drying shed, first evaporator, first condenser and described second
Condenser is set in the air duct.
Preferably,
Be additionally provided with blower in the air duct, the blower be located at first evaporator and first condenser it
Between or between first evaporator and second condenser.
A kind of heat pump system, control method and heat pump drying device provided by the utility model have the following beneficial effects:
1. the utility model passes through the first and second cooling cycle systems of setting and the two is made to carry out overlapping by heat exchanger,
Be capable of providing high temperature heating gas, and by the difference in the temperature range section in the drying shed that detects, and determine be
The different operational modes of system are taken when being in low-temperature range in drying shed and only open the second relatively low refrigeration of refrigerant boiling point
The circulatory system closes higher first cooling cycle system of boiling point, and to the function that heating heats is provided in drying shed, (open type is followed
Ring), the effect being rapidly heated can be realized to drying shed, and efficiency greatly improves for electrically heated mode；It is dry
The first and second cooling cycle systems are taken while being opened in room when being in medium temperature section, make the first refrigeration cycle using superposition type
System also from the second cooling cycle system draw heat, to promote air themperature, improve efficiency；Drying shed is in high-temperature region
Between when take and open relatively high the first cooling cycle system of boiling point, to providing the function (enclosed of heating dehumidifying in drying shed
Circulation), the latent heat of high-temperature vapor has effectively been recycled at this time, effectively improves the efficiency of system；It is followed by single-stage heat pump
Ring is combined with the switching of overlapping heat pump cycle, open type heating with enclosed dehumidification mode, realizes the efficient fortune of heat pump drying whole process
Row；
2. the utility model, which also passes through setting auxiliary heater, meets continuous heating institute calorific requirement during defrosting, it is ensured that add
Thermal process continues, the slow problem of heating up process caused by avoiding because of defrosting.
Detailed description of the invention
Fig. 1 is the loop structure schematic diagram of the heat pump system of the utility model；
Fig. 2 is the structural schematic diagram of the heat pump drying device of the utility model.
Appended drawing reference indicates in figure are as follows:
101, the first compressor；121, the first condenser；132, the first evaporator；131, heat exchanger；122, auxiliary condensation
Device；201, the second compressor；221, the second condenser；231, the second evaporator；232, auxiliary heater；301, the first branch；
302, second branch；303, third branch；304, the 4th branch；305, the 5th branch；306, the 6th branch；307, the 7th
Road；308, the 8th branch；309, the 9th branch；105, the first control valve；106, the second control valve；102, third control valve；
203, the 4th control valve；202, the 5th control valve；206, the 6th control valve；204, the 7th control valve；208, the 8th control valve；
205, the 9th control valve；103, first throttle valve；104, second throttle；207, third throttle valve；209, the 4th throttle valve；
10, drying shed；20, air duct；111, blower.
Specific embodiment
As shown in Figs. 1-2, the utility model provides a kind of heat pump system, can be used in the dry materials in drying shed,
Comprising:
First cooling cycle system, including the first compressor 101, the first condenser 121, the first evaporator 132 and change
Hot device 131, the heat exchanger 131 are arranged in parallel in the both ends of first evaporator 132, first cooling cycle system
Fill the first refrigerant；
Second cooling cycle system, including the second compressor 201, the second condenser 221, the second evaporator 231 and institute
Heat exchanger 131 is stated, the heat exchanger 131 is arranged in parallel at the both ends of second condenser 221, and first refrigeration cycle
System is exchanged heat with second cooling cycle system by the heat exchanger 131, is filled in second cooling cycle system
Second refrigerant is infused, and the boiling point of first refrigerant is greater than the second refrigerant；
First cooling cycle system can temperature Tin > T1 in dry room by it is independent open, described at this time the
Two cooling cycle systems can be closed；Second cooling cycle system can be in the temperature Tin < T2 quilt in dry room
It individually opens, first cooling cycle system can be closed at this time；First cooling cycle system and second system
SAPMAC method system can be opened simultaneously in temperature T2≤Tin≤T1 in dry room, wherein T1 > T2.
The utility model passes through the first and second cooling cycle systems of setting and the two is made to carry out overlapping, energy by heat exchanger
High temperature is enough provided and heats gas, and the difference in the temperature range section in the drying shed by detecting, and determines system
Different operational modes, taken when being in low-temperature range in drying shed and only open the second relatively low refrigeration of refrigerant boiling point and follow
Loop system, close higher first cooling cycle system of boiling point, in drying shed provide heating heating function (open circulation),
The effect being rapidly heated can be realized to drying shed, and efficiency greatly improves for electrically heated mode；At drying shed
The first and second cooling cycle systems are taken while opened when medium temperature section, make the first cooling cycle system using superposition type
Also from the second cooling cycle system draw heat, to promote air themperature, improve efficiency；When drying shed is in high temperature section
It takes and opens the first relatively high cooling cycle system of boiling point, (enclosed is followed to the function that heating dehumidifies is provided in drying shed
Ring), the latent heat of high-temperature vapor has effectively been recycled at this time, effectively improves the efficiency of system；Pass through single-stage heat pump cycle
It is combined with the switching of overlapping heat pump cycle, open type heating with enclosed dehumidification mode, realizes the efficient operation of heat pump drying whole process.
When drying room temperature is lower, the low-temperature level (subsystem 2) in cascade system is run, in the little situation of pressure ratio
Under, the efficiency of single-stage operation is higher than cascade system；
Dry room temperature increases, and pressure ratio increases at this time, and overlapping operational efficiency is higher than single-stage operation, therefore high-temperature level and low
Warm grade (subsystem 1 and subsystem 2) all runs；
When dry room temperature reaches certain preset value, when into dehumidification operating mode, entire drying system is adopted at this time
It is run with enclosed, evaporator recycles the latent heat of condensed water, only runs high-temperature level (subsystem 1) at this time.
Preferably,
When first cooling cycle system is individually opened, the heat exchanger 131 does not work, first evaporator
132 and first condenser 121 work；
When second cooling cycle system is individually opened, the heat exchanger 131 does not work, second evaporator
231 and second condenser 221 work；
When first cooling cycle system and second cooling cycle system are opened simultaneously, the heat exchanger 131
Work, first evaporator 132 does not work, second condenser 221 does not work.
This be that first cooling cycle system of the utility model is individually opened, the second cooling cycle system is individually opened and
First and second cooling cycle systems when opening simultaneously the respective preferred control mode of difference, the first cooling cycle system individually open
It opens and corresponds to worst hot case, heat exchanger need not be opened at this time, without absorbing heat outside drying shed, only need the first evaporator and the
One condenser working, at this time the first evaporator and the first condenser be respectively positioned on inside drying shed, can be inside drying shed
The evaporation latent heat of vapor has effectively been recycled in the effect for completing heating and dehumidifying, improves efficiency；Second cooling cycle system is independent
It opens and corresponds to worst cold case, heat exchanger need not be opened at this time, need to be absorbed heat outside drying shed, open the second evaporator and the
Two condenser workings, from outdoor heat absorption and for realizing the effect quickly heated inside heat drying room, compared with the side such as electric heating
Formula improves efficiency；First and second cooling cycle systems open correspond to middle temperature operating mode, at this time open heat exchanger, need to be from drying
It absorbs heat outside room, improve heating effect and realizes the effect for producing high temperature air, improve efficiency.
Preferably,
Branch where first evaporator 132 is the first branch 301, and the is provided in the first branch 301
One control valve 105；Branch in first cooling cycle system, where the heat exchanger 131 is second branch 302, and institute
It states and is provided with the second control valve 106 in second branch 302, the first branch 301 is in parallel with the second branch 302.This is
The preferred constructive form of the heat pump system of the utility model, i.e. the first evaporator are controlled by the first control valve, and second
Road is controlled by the second control valve.
Preferably,
Branch where first condenser 121 is third branch 303, and the first cooling cycle system further includes and institute
The 4th branch 304 that third branch 303 is arranged in parallel is stated, and is provided with auxiliary condenser 122 on the 4th branch 304, and
Third control valve 102 and first throttle valve 103 are additionally provided on 4th branch 304；The third branch 303 and described
Second throttle 104 is provided between after four branches 304 converge and before the first branch 301 and 302 branch of second branch.This
It is the preferred constructive form of the heat pump system of the utility model, i.e. auxiliary condenser is controlled and led to by third control valve
The size that its flow is flowed through in first throttle valve control is crossed, the throttling of the first refrigerant of the entire circulatory system drops in second throttle
Pressure is controlled.
Preferably,
Branch where second condenser 221 is the 5th branch 305, and the is provided on the 5th branch 305
Four control valves 203, the branch in second cooling cycle system, where the heat exchanger 131 are the 6th branch 306, and institute
It states and is provided with the 5th control valve 202 on the 6th branch 306, the 5th branch 305 is in parallel with the 6th branch 306.This is
The preferred constructive form of the heat pump system of the utility model, i.e. the second condenser are controlled by the 4th control valve, and the 6th
Road is controlled by the 5th control valve.
Preferably,
Branch where second evaporator 231 is the 7th branch 307, is provided with third on the 7th branch 307
Throttle valve 207 and the 6th control valve 206, and the heat pump system further includes the 8th branch 308, the one of the 8th branch 308
Exhaust end, the other end that end is connected to second compressor 201 are connected to the 6th control valve 206 and third throttling
Between valve 207, and the 8th road is provided with the 7th control valve 204.This is the preferred of the heat pump system of the utility model
Structure type, i.e. the second evaporator controlled by the 6th control valve, by third throttle valve control throttle-flow, and the 8th
The setting on road is in order to which the heat of compressor to be bypassed to the effect for completing defrost in the second evaporator 231.
Preferably,
It further include the 9th branch 309 being arranged in parallel with the 7th branch 307, and on the 9th branch 309 also
It is provided with auxiliary heater 232, is additionally provided with the 4th throttle valve 209 and the 8th control valve 208 on the 9th branch 309；Institute
It states and is additionally provided with the 9th control valve 205 between the 9th branch 309 and the 7th branch 307.This is the heat pump of the utility model
The preferred constructive form of system can carry out heat effect to refrigerant by setting auxiliary heater, to evaporate to second
Device realizes effective defrosting effect, is controlled by the 8th control valve, by third throttle valve control throttle-flow, the 9th control
Valve processed realizes further effective control action.
The utility model also provides a kind of control method of heat pump system, uses preceding described in any item heat pump systems,
Controlled when temperature Tin > T1 in dry room first cooling cycle system by it is independent open, second refrigeration at this time
The circulatory system is closed；Controlled when temperature Tin < T2 in dry room second cooling cycle system by it is independent open,
First cooling cycle system is closed at this time；First system is controlled when drying temperature T2≤Tin≤T1 in room
SAPMAC method system and second cooling cycle system are opened simultaneously.
The utility model passes through the first and second cooling cycle systems of setting and the two is made to carry out overlapping, energy by heat exchanger
High temperature is enough provided and heats gas, and the difference in the temperature range section in the drying shed by detecting, and determines system
Different operational modes, taken when being in low-temperature range in drying shed and only open the second relatively low refrigeration of refrigerant boiling point and follow
Loop system, close higher first cooling cycle system of boiling point, in drying shed provide heating heating function (open circulation),
The effect being rapidly heated can be realized to drying shed, and efficiency greatly improves for electrically heated mode；At drying shed
The first and second cooling cycle systems are taken while opened when medium temperature section, make the first cooling cycle system using superposition type
Also from the second cooling cycle system draw heat, to promote air themperature, improve efficiency；When drying shed is in high temperature section
It takes and opens the first relatively high cooling cycle system of boiling point, (enclosed is followed to the function that heating dehumidifies is provided in drying shed
Ring), the latent heat of high-temperature vapor has effectively been recycled at this time, effectively improves the efficiency of system；Pass through single-stage heat pump cycle
It is combined with the switching of overlapping heat pump cycle, open type heating with enclosed dehumidification mode, realizes the efficient operation of heat pump drying whole process.
A kind of control method of Analysis of Heat Pump Drying System provided by the utility model, the heat pump system is by subsystem 1 (first
Cooling cycle system) and subsystem 2 (the second cooling cycle system) overlapping form, subsystem 1 has the first compressor 101, the
One condenser 121 and auxiliary condenser 122, throttling set, heat exchanger 131 and the first evaporator 132 and shut-off valve, subsystem
2 have the second compressor 201, the second condenser 221 and heat exchanger 131, throttling set, the second evaporator 231 and auxiliary heating
Device 232 and shut-off valve, the evaporator 1 of subsystem 1 and the heat exchanger 131 of subsystem 2 form overlapping 1.The control method packet
It includes, the control method and T2≤drying room temperature of the control method of dry room temperature Tin>T1, dry room temperature Tin<T2
The control method of Tin≤T1 is spent, T1 and T2 are related with outdoor environment temperature Tout, and T1 > T2.According to different drying shed temperature
Determine different control methods.
When drying room temperature is lower, the low-temperature level (subsystem 2) in cascade system is run, in the little situation of pressure ratio
Under, the efficiency of single-stage operation is higher than cascade system；
Dry room temperature increases, and pressure ratio increases at this time, and overlapping operational efficiency is higher than single-stage operation, therefore high-temperature level and low
Warm grade (subsystem 1 and subsystem 2) all runs；
When dry room temperature reaches certain preset value, when into dehumidification operating mode, entire drying system is adopted at this time
It is run with enclosed, evaporator recycles the latent heat of condensed water, only runs high-temperature level (subsystem 1) at this time.
Preferably,
When including the first control valve 105, the second control valve 106, third control valve 102 and the 4th control valve the 203, the 5th
When control valve 202, the 6th control valve 206, the 7th control valve 204, the 8th control valve 208 and nine control valves 205:
And as temperature Tin > T1 in dry room, the 4th control valve 203 of control, the control of the 5th control valve the 202, the 6th
Valve 206, the 7th control valve 204, the 8th control valve 208 and the 9th control valve 205 are turned off, and are controlled third control valve 102 and opened
It opens, first control valve 105 is opened, the control closing of the second control valve 106.Refrigerant flow direction is followed successively by subsystem 1
First compressor 101, the first condenser 121 and auxiliary condenser 122, second throttle 104, the first evaporator 132 and first
Compressor 101, the first condenser 121 and auxiliary condenser 122 are in parallel at this time, flow through the refrigerant flow of auxiliary condenser 122
It is adjusted by first throttle valve 103.
Specific control means and control mode when this is temperature Tin > T1 in the drying room of the utility model, that is, close
The second cooling cycle system (subsystem 2) is closed, only opens the first cooling cycle system (subsystem 1), and close heat exchanger 131
The branch and the branch where opening auxiliary condenser at place, can be in drying shed by the first condenser and the first evaporator
The interior function of completing dry heating and dehumidifying, and can be in drying shed by auxiliary condenser (being arranged outside drying shed)
Temperature is regulated and controled and is formed energy supplement.
Preferably,
When including the first control valve 105, the second control valve 106, third control valve 102 and the 4th control valve the 203, the 5th
When control valve 202, the 6th control valve 206, the 7th control valve 204, the 8th control valve 208 and nine control valves 205:
And as temperature T2≤Tin≤T1 in dry room, controls second control valve 106 and open, described in control
Third control valve 102 and first control valve 105 are closed；Control the 5th control valve 202, the 9th control valve 205 and the 6th control
Valve 206 processed is opened, and the 4th control valve 203 of control, the 7th control valve 204, the 8th control valve 208 are closed.Refrigerant in subsystem 2
Flow direction is followed successively by the second compressor 201,131 condensation channel side of heat exchanger, third throttle valve 207, the second evaporator 231 and second
Compressor 201, in subsystem 1 refrigerant flow direction be followed successively by the first compressor 101, the first condenser 121, second throttle 104,
Heat exchanger 131 and the first compressor 101.
Specific control means and controlling party when this is temperature T2≤Tin≤T1 in the drying room of the utility model
Formula opens the first cooling cycle system (subsystem 1) and the second cooling cycle system (subsystem 2) simultaneously, and opens and change
The branch where branch and closing auxiliary condenser, the branch where the second condenser of closing 221 where hot device 131, lead to
Function (the open circulation, because only that the first condenser is located at of dry heating can be completed in drying shed by crossing the first condenser
In drying shed), and acted on by the heating that heat exchanger can be realized higher temperature, improve efficiency.
Preferably,
When including the first control valve 105, the second control valve 106, third control valve 102 and the 4th control valve the 203, the 5th
When control valve 202, the 6th control valve 206, the 7th control valve 204, the 8th control valve 208 and nine control valves 205:
And as the temperature Tin < T2 in dry room, the first control valve 105, the second control valve 106, third control are controlled
Valve 102 processed is turned off；It controls the 4th control valve 203 and the 6th control valve 206 is opened, control the 5th control valve the 202, the 9th control
Valve 205, the 7th control valve 204, the 8th control valve 208 are closed.In subsystem 2 refrigerant flow direction be followed successively by the second compressor 201,
Second condenser 221, third throttle valve 207, the second evaporator 231 and the second compressor 201.
Specific control means and control mode when this is the temperature Tin < T2 in the drying room of the utility model, i.e.,
The first cooling cycle system (subsystem 1) is closed, only opens the second cooling cycle system (subsystem 2), and close heat exchanger
Branch and the second evaporator of opening where 131 and the branch where the second condenser 221, pass through the second condenser and second
Evaporator can complete the function (open circulation, because the second evaporator is located at outside drying shed) of dry heating in drying shed,
Quickly heating.
Preferably,
When needing to 231 defrost of the second evaporator: when including the first control valve 105, the second control valve 106, the
Three control valves 102 and the 4th control valve 203, the 5th control valve 202, the 6th control valve 206, the control of the 7th control valve the 204, the 8th
When valve 208 and nine control valves 205 processed:
As temperature Tin≤T1 in dry room, the first control valve 105 of control, the second control valve 106, third control
Valve 102 and the 4th control valve 203, the 6th control valve 206 and the 8th control valve 208 are turned off, and the 7th control valve 204 of control is beaten
It opens.
This is the preferred control means of the defrosting process of the utility model, by the opening of the 8th branch so that compressor
Heat can be passed in the second evaporator to carry out defrost effect to the second evaporator.
Defrosting branch refrigerant flow direction is followed successively by the second compressor 201, the 7th control valve 204, third throttle valve 207, the
Two evaporators 231 and the second compressor 201.At this point, subsystem 2 heats the refrigeration of branch as dry room temperature Tin < T2
Agent flow direction is followed successively by the second compressor 201, the 4th control valve 203, the second condenser 221, the control of the 9th control valve the 205, the 8th
Valve 208, the 4th throttle valve 209, auxiliary heater 232 and the second compressor 201, the 5th control valve 202 are closed；When T2≤drying
When room temperature Tin≤T1, the refrigerant flow direction that subsystem 2 heats branch is followed successively by the second compressor 201, the 5th control valve
202, heat exchanger 131, the 8th control valve 208, auxiliary heater 232 and the second compressor 201, the 4th control valve 203 are closed.
Preferably,
As the temperature Tin < T2 in dry room: also controlling the 4th control valve 203, the 9th control valve 205
It is opened with the 8th control valve 208；
As temperature T2≤Tin < T1 in dry room: also controlling the 5th control valve 202 and the 8th control
Valve 208 processed is opened.
This is the control mode of the further defrost of the utility model, i.e., can also pass through the second condenser and auxiliary heater
Refrigerant is heated to achieve the purpose that the second evaporator defrost, or heats refrigeration by heat exchanger and auxiliary heater
Agent is to achieve the purpose that the second evaporator defrost.Meet heat needed for continuous heating during defrosting by setting auxiliary heater
Amount, it is ensured that heating process is lasting, the slow problem of heating up process caused by avoiding because of defrosting.
The utility model also provides a kind of heat pump drying device comprising preceding described in any item heat pump systems further include
Drying shed 10, the heat pump system can be to being heated and/or dehumidified in the drying shed 10.
The utility model passes through the first and second cooling cycle systems of setting and the two is made to carry out overlapping, energy by heat exchanger
High temperature is enough provided and heats gas, and the difference in the temperature range section in the drying shed by detecting, and determines system
Different operational modes, taken when being in low-temperature range in drying shed and only open the second relatively low refrigeration of refrigerant boiling point and follow
Loop system, close higher first cooling cycle system of boiling point, in drying shed provide heating heating function (open circulation),
The effect being rapidly heated can be realized to drying shed, and efficiency greatly improves for electrically heated mode；At drying shed
The first and second cooling cycle systems are taken while opened when medium temperature section, make the first cooling cycle system using superposition type
Also from the second cooling cycle system draw heat, to promote air themperature, improve efficiency；When drying shed is in high temperature section
It takes and opens the first relatively high cooling cycle system of boiling point, (enclosed is followed to the function that heating dehumidifies is provided in drying shed
Ring), the latent heat of high-temperature vapor has effectively been recycled at this time, effectively improves the efficiency of system；Pass through single-stage heat pump cycle
It is combined with the switching of overlapping heat pump cycle, open type heating with enclosed dehumidification mode, realizes the efficient operation of heat pump drying whole process.
Preferably,
It further include the air duct 20 in the drying shed 10, first evaporator 132, first condenser 121
It is set in the air duct 20 with second condenser 221.This is the preferred structure of the heat pump drying device of the utility model
Form by the way that air duct is arranged enables to that air stream is heated or dehumidified by multiple heat exchangers inside air duct, and will
The air-flow for completing heating and/or dehumidifying is transmitted in dried material, again to complete heating and/or dehumidifying.
Preferably,
Blower 111 is additionally provided in the air duct 20, the blower 111 is located at first evaporator 132 and described
Between one condenser 121 or between first evaporator 132 and second condenser 221.This is the utility model
Further preferred structure type, heat transfer effect can be improved by blower, reinforce the effect of heating and/or dehumidifying.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.The above is only the preferred embodiment of the utility model, it is noted that for the art
For those of ordinary skill, without deviating from the technical principle of the utility model, several improvements and modifications can also be made,
These improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (10)
1. a kind of heat pump system can be used in the dry materials in drying shed, it is characterised in that: include:
First cooling cycle system, including the first compressor (101), the first condenser (121), the first evaporator (132) and
Heat exchanger (131), the heat exchanger (131) are arranged in parallel at the both ends of first evaporator (132), and first refrigeration is followed
The first refrigerant is filled in loop system；
Second cooling cycle system, including the second compressor (201), the second condenser (221), the second evaporator (231) and
The heat exchanger (131), the heat exchanger (131) are arranged in parallel at the both ends of second condenser (221), and described first
Cooling cycle system is exchanged heat with second cooling cycle system by the heat exchanger (131), and second refrigeration is followed
Second refrigerant is passed through in loop system, and the boiling point of first refrigerant is greater than the second refrigerant；
First cooling cycle system described second can be made in temperature Tin > T1 in dry room by independent unlatching, at this time
SAPMAC method system can be closed；Second cooling cycle system can be independent in the temperature Tin < T2 in dry room
It opens, first cooling cycle system can be closed at this time；First cooling cycle system and second refrigeration are followed
Loop system can be opened simultaneously in temperature T2≤Tin≤T1 in dry room, wherein T1 > T2.
2. heat pump system according to claim 1, it is characterised in that:
When first cooling cycle system is individually opened, the heat exchanger (131) does not work, first evaporator
(132) it works with first condenser (121)；
When second cooling cycle system is individually opened, the heat exchanger (131) does not work, second evaporator
(231) it works with second condenser (221)；
When first cooling cycle system and second cooling cycle system are opened simultaneously, heat exchanger (131) work
Make, first evaporator (132) does not work, second condenser (221) does not work.
3. heat pump system according to claim 1, it is characterised in that:
Branch where first evaporator (132) is the first branch (301), and is provided in the first branch (301)
First control valve (105)；Branch in first cooling cycle system, where the heat exchanger (131) is second branch
(302), it and in the second branch (302) is provided with the second control valve (106), the first branch (301) and described second
Branch (302) is in parallel.
4. heat pump system according to claim 3, it is characterised in that:
Branch where first condenser (121) is third branch (303), and the first cooling cycle system further includes and institute
The 4th branch (304) that third branch (303) is arranged in parallel is stated, and is provided with auxiliary condenser on the 4th branch (304)
(122), third control valve (102) and first throttle valve (103) and on the 4th branch (304) are additionally provided with；The third
Branch (303) and the 4th branch (304) converge after with the first branch (301) and second branch (302) branch before it
Between be provided with second throttle (104).
5. heat pump system described in any one of -4 according to claim 1, it is characterised in that:
Branch where second condenser (221) is the 5th branch (305), and is provided on the 5th branch (305)
4th control valve (203), the branch in second cooling cycle system, where the heat exchanger (131) are the 6th branch
(306), the 5th control valve (202), the 5th branch (305) and the described 6th and on the 6th branch (306) are provided with
Branch (306) is in parallel.
6. heat pump system described in any one of -4 according to claim 1, it is characterised in that:
Branch where second evaporator (231) is the 7th branch (307), and the is provided on the 7th branch (307)
Three throttle valves (207) and the 6th control valve (206), and the heat pump system further includes the 8th branch (308), the 8th branch
(308) exhaust end, the other end that one end is connected to second compressor (201) are connected to the 6th control valve (206)
Between the third throttle valve (207), and the 8th road is provided with the 7th control valve (204).
7. heat pump system according to claim 6, it is characterised in that:
It further include the 9th branch (309) being arranged in parallel with the 7th branch (307), and on the 9th branch (309)
It is additionally provided with auxiliary heater (232), the 4th throttle valve (209) and the 8th control is additionally provided on the 9th branch (309)
Valve (208)；The 9th control valve (205) is additionally provided between 9th branch (309) and the 7th branch (307).
8. a kind of heat pump drying device, it is characterised in that: including heat pump system of any of claims 1-7, also wrap
It includes drying shed (10), the heat pump system interior to the drying shed (10) can be heated and/or be dehumidified.
9. heat pump drying device according to claim 8, it is characterised in that:
It further include the air duct (20) in the drying shed (10), first evaporator (132), first condenser
(121) it is set in the air duct (20) with second condenser (221).
10. heat pump drying device according to claim 9, it is characterised in that:
It is additionally provided with blower (111) in the air duct (20), the blower (111) is located at first evaporator (132) and institute
It states between the first condenser (121) or between first evaporator (132) and second condenser (221).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920274770.3U CN209588445U (en) | 2019-03-04 | 2019-03-04 | Heat pump system and heat pump drying device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920274770.3U CN209588445U (en) | 2019-03-04 | 2019-03-04 | Heat pump system and heat pump drying device |
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| Publication Number | Publication Date |
|---|---|
| CN209588445U true CN209588445U (en) | 2019-11-05 |
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ID=68371558
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| CN201920274770.3U Active CN209588445U (en) | 2019-03-04 | 2019-03-04 | Heat pump system and heat pump drying device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109737625A (en) * | 2019-03-04 | 2019-05-10 | 珠海格力电器股份有限公司 | Heat pump system, control method and heat pump drying device |
| CN111595002A (en) * | 2020-05-18 | 2020-08-28 | 广东美的暖通设备有限公司 | Air conditioning system, control method thereof, control device thereof and readable storage medium |
-
2019
- 2019-03-04 CN CN201920274770.3U patent/CN209588445U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109737625A (en) * | 2019-03-04 | 2019-05-10 | 珠海格力电器股份有限公司 | Heat pump system, control method and heat pump drying device |
| CN109737625B (en) * | 2019-03-04 | 2023-07-25 | 珠海格力电器股份有限公司 | Heat pump system, control method and heat pump drying device |
| CN111595002A (en) * | 2020-05-18 | 2020-08-28 | 广东美的暖通设备有限公司 | Air conditioning system, control method thereof, control device thereof and readable storage medium |
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