CN211084493U - Drying and refrigerating integrated system - Google Patents
Drying and refrigerating integrated system Download PDFInfo
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- CN211084493U CN211084493U CN201921854295.3U CN201921854295U CN211084493U CN 211084493 U CN211084493 U CN 211084493U CN 201921854295 U CN201921854295 U CN 201921854295U CN 211084493 U CN211084493 U CN 211084493U
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- 238000001035 drying Methods 0.000 title claims abstract description 145
- 239000003507 refrigerant Substances 0.000 claims abstract description 67
- 238000005338 heat storage Methods 0.000 claims abstract description 64
- 239000011232 storage material Substances 0.000 claims abstract description 50
- 238000010438 heat treatment Methods 0.000 claims abstract description 39
- 238000010521 absorption reaction Methods 0.000 claims abstract description 12
- 238000005057 refrigeration Methods 0.000 claims description 71
- 238000009833 condensation Methods 0.000 claims description 16
- 230000005494 condensation Effects 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 15
- 230000002411 adverse Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 46
- 238000010981 drying operation Methods 0.000 description 22
- 238000000034 method Methods 0.000 description 20
- 238000001816 cooling Methods 0.000 description 18
- 230000006870 function Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 6
- 230000015654 memory Effects 0.000 description 5
- 238000010257 thawing Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000007791 dehumidification Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The application relates to a drying and refrigerating integrated system, and belongs to the technical field of drying and refrigerating. The application includes: the drying module is used for heating the drying space by utilizing the heat release of the first refrigerant; the refrigerating module is used for refrigerating the refrigerating space by utilizing the heat absorption of the second refrigerant; a condensing evaporator comprising: the condensing evaporator is respectively connected with the drying module and the refrigerating module through the two refrigerant channels, so that when a first refrigerant and a second refrigerant respectively flow through the condensing evaporator, the first refrigerant and the second refrigerant respectively exchange heat with the phase-change heat storage material in the condensing evaporator. Through this application, when helping realizing promoting energy utilization, solve stoving and cold-stored adverse effect of one in the two to another.
Description
Technical Field
The application belongs to the technical field of the cold-stored technique of stoving, concretely relates to integrative system of stoving cold-stored.
Background
The heat pump drying is widely used in the industrial and agricultural fields, and the using area is distributed all over the country. Considering that most agricultural and sideline products not only need to be dried, but also need a refrigeration house for refrigeration and fresh-keeping, the evaporator of the heat pump system can be utilized to realize the refrigeration function. However, in practical applications, the drying process control is composed of a plurality of process stages, for example, including: the heating-up stage, the temperature maintaining stage, the shutdown stage and the like, the heating-up speed and the temperature maintaining performance have great influence on the drying quality, the drying load control change is large, the control of the freezing and refrigerating system is single, the refrigerating load control change is small, in the aspect of control, the load mismatching often occurs when the heat pump system is used for drying and refrigerating at the same time in practice, for example, one of the drying and refrigerating stages has a large load and the other has a small load, the temperature maintaining performance is poor, and the respective control of the drying and refrigerating stages can have adverse influence on the square.
SUMMERY OF THE UTILITY MODEL
For overcoming the problem that exists in the correlation technique at least to a certain extent, this application provides the cold-stored integrative system of stoving, when helping realizing promoting energy utilization, solves stoving and cold-stored adverse effect of one in the two to the other.
In order to achieve the purpose, the following technical scheme is adopted in the application:
the application provides a cold-stored integrative system of stoving includes:
the drying module is used for heating the drying space by utilizing the heat release of the first refrigerant;
the refrigerating module is used for refrigerating the refrigerating space by utilizing the heat absorption of the second refrigerant;
a condensing evaporator comprising: the condensing evaporator is respectively connected with the drying module and the refrigerating module through the two refrigerant channels, so that when the first refrigerant and the second refrigerant respectively flow through the condensing evaporator, the first refrigerant and the second refrigerant respectively exchange heat with the phase-change heat storage material in the condensing evaporator.
Further, the drying module includes:
the first condenser is used for heating the dried air outlet passing through the first condenser;
a first compressor forming a first flow path with the first condenser;
the first flow path and one refrigerant channel of the condensing evaporator form a closed flow path.
Further, the drying module further comprises:
a first evaporator configured as an outdoor evaporator;
a first solenoid valve forming a second flow path with the first evaporator;
the first flow path also forms a closed flow path with the second flow path.
Further, the drying module further comprises:
the second evaporator is used for dehumidifying the drying return air;
a second solenoid valve forming a third flow path with the second evaporator;
the first flow path and the third flow path also form a closed flow path.
Further, the drying module further comprises:
and a first four-way valve formed in the first flow path, and the first compressor is connected to the first condenser through the first four-way valve.
Further, the drying module further comprises:
and a first gas-liquid separator formed in the first flow path, wherein a refrigerant outlet of the first gas-liquid separator is connected with a refrigerant inlet of the first compressor.
Further, the drying module further comprises:
and the first throttling device is formed in the first flow path and is used for adjusting the first refrigerant flowing out of the first condenser during drying.
Further, the refrigeration module includes:
the third evaporator is used for refrigerating the cold storage air outlet passing through the third evaporator;
a second compressor forming a fourth flow path with the third evaporator;
the fourth flow path and the other refrigerant channel in the condensation evaporator form a closed flow path.
Further, the phase change heat storage material in the condensing evaporator is configured according to the following formula:
Qmax＞MAX(QL2max*tT，(QL2max-QZLmin)*tS)，
wherein Q ismaxRepresents the maximum heat storage amount, Q, of the phase change heat storage material in the condensation evaporatorL2maxRepresents the maximum heat release, t, of the refrigeration moduleTRepresents the duration of the operation of the drying module in the shutdown phase, QZLminDenotes the minimum evaporating temperature, t, of the condensing evaporatorSAnd representing the running duration of the heating stage of the drying module.
Further, the refrigeration module further comprises:
a second condenser configured as an outdoor condenser;
a third electromagnetic valve forming a fifth flow path with the second condenser;
the fourth flow path also forms a closed flow path with the fifth flow path.
Further, if the condensing evaporator is full of the phase change heat storage materialIt suffices that the following conditions are satisfied: qmax＜MAX(QL2max*tT，(QL2max-QZLmin)*tS) The refrigeration module is also provided with the fifth flow path;
wherein Q ismaxRepresents the maximum heat storage amount, Q, of the phase change heat storage material in the condensation evaporatorL2maxRepresents the maximum heat release, t, of the refrigeration moduleTRepresents the duration of the operation of the drying module in the shutdown phase, QZLminDenotes the minimum evaporating temperature, t, of the condensing evaporatorSAnd representing the running duration of the heating stage of the drying module.
Further, the refrigeration module further comprises:
and a second four-way valve formed in the fourth flow path, the second compressor being connected to the third evaporator through the second four-way valve.
Further, the refrigeration module further comprises:
and a second gas-liquid separator formed in the fourth flow path, a refrigerant outlet of the second gas-liquid separator being connected to a refrigerant inlet of the second compressor.
Further, the refrigeration module further comprises:
and the second throttling device is formed in the fourth flow path and is used for adjusting the second refrigerant entering the third evaporator during refrigeration.
This application adopts above technical scheme, possesses following beneficial effect at least:
this application utilizes drying module to be connected with the condensation evaporimeter, and cold-stored module is connected with cold-stored module, form stoving and two cold-stored independent refrigerant circulation system, can realize the cold-stored thermal utilization each other of both of stoving, promote energy utilization, and simultaneously, stoving and cold-stored two independent refrigerant circulation system that form, combine the heat accumulation of the phase change heat storage material in the condensation evaporimeter, both can satisfy the great requirement of stoving load control change, and the less requirement of cold-stored load control change, can solve again and dry and cold-stored adverse effect of one in the two to another person.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an integrated drying and refrigerating system according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a drying and refrigerating integrated system according to another embodiment of the present application;
fig. 3 is a schematic flow chart of a control method of a drying and refrigerating integrated system according to an embodiment of the present application;
fig. 4 is a schematic flowchart of a control method of a drying and refrigerating integrated system according to another embodiment of the present application;
fig. 5 is a schematic structural diagram of a drying and refrigerating integrated system according to another embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a schematic structural diagram of a drying and refrigerating integrated system provided in an embodiment of the present application, and fig. 2 is a schematic structural diagram of a drying and refrigerating integrated system provided in another embodiment of the present application; as shown in fig. 1 and 2, the drying and refrigerating integrated system includes:
the drying module 11 is used for heating the drying space by utilizing heat release of the first refrigerant;
the refrigerating module 12 is used for refrigerating the refrigerating space by utilizing the heat absorption of the second refrigerant;
the condensing evaporator 13 includes: the two refrigerant channels 131 and the phase change heat storage material 132 (shown by oblique filling in fig. 1 and 2) filled around the two refrigerant channels 131, the condenser-evaporator 13 is respectively connected to the drying module 11 and the refrigerating module 12 through the two refrigerant channels 131, so that when the first refrigerant and the second refrigerant respectively flow through the condenser-evaporator 13, the first refrigerant and the second refrigerant respectively exchange heat with the phase change heat storage material 132 in the condenser-evaporator 13.
Specifically, drying module 11 is connected with condensation evaporimeter 13, and cold storage module 12 is connected with cold storage module 12, overlapping formula system has been formed, form two independent refrigerant circulation systems of stoving and cold storage, can realize stoving cold storage both thermal utilization each other, promote energy utilization, simultaneously, stoving and cold storage form two independent refrigerant circulation systems, combine the heat accumulation of phase change heat storage material 132 in condensation evaporimeter 13, both can satisfy the great requirement of stoving load control change, and the less requirement of cold storage load control change. When the drying and refrigerating system is applied specifically, when the loads of the drying and refrigerating system are not matched, for example, when the drying heating load is large and the refrigerating load is small, the heat stored in the phase change heat storage material 132 can be further utilized to meet the requirement of the drying large heating load, and the problem that the loads of the drying and refrigerating system are not matched is solved; for another example, when the drying and heating load is small and the refrigerating and cooling load is large, the heat absorption and storage of the phase change heat storage material 132 can be further utilized to solve the problem of unmatched drying and refrigerating loads.
To sum up, through above-mentioned embodiment scheme, this application realizes having expanded overlapping formula heat pump system's application, realizes the cold-stored integrative function of stoving, can effectively promote energy utilization and rate, simultaneously, further through the heat accumulation that combines the phase change heat storage material 132 in the condensation evaporator 13 again, has solved the problem of stoving and cold-stored adverse effect of one in the two to another again.
As shown in fig. 1 and 2, in some embodiments, the drying module 11 includes:
the first condenser 111 is used for heating the drying air outlet passing through the first condenser 111;
a first compressor 112 forming a first flow path with the first condenser 111;
the first flow path and one of the refrigerant passages 131 of the condenser-evaporator 13 form a closed flow path.
Specifically, the first compressor 112 drives the first refrigerant to circulate in a closed flow path formed by the first flow path and one refrigerant channel 131 of the condenser-evaporator 13, and the first condenser 111 serves as a heater for drying the outlet air (the arrow of the drying room portion in fig. 1 and 2 indicates the direction of the drying air), and heats the passing drying outlet air to control the temperature of the drying space.
As shown in fig. 1 and 2, in some embodiments, the drying module 11 further includes:
a first evaporator 113 configured as an outdoor evaporator;
a first solenoid valve 114 forming a second flow path with the first evaporator 113;
the first flow path also forms a closed flow path with the second flow path.
Specifically, when the heat stored in the phase change heat storage material 132 in the condenser-evaporator 13 cannot satisfy the drying and heating load, the first compressor 112 may drive the first refrigerant to circulate through a closed flow path formed by the first flow path and the second flow path by opening the first solenoid valve 114, and the first evaporator 113 serving as an outdoor evaporator may absorb heat from the outside air to supplement the drying and heating load.
As shown in fig. 1 and 2, in some embodiments, the drying module 11 further includes:
a second evaporator 115 for dehumidifying the drying return air;
a second solenoid valve 116 forming a third flow path with the second evaporator 115;
the first flow path and the third flow path also form a closed flow path.
Specifically, according to the embodiment, the system further realizes an integrated dehumidification function for the drying space, dehumidification is required in the drying process, the first compressor 112 can drive the first refrigerant to circulate in the closed flow path formed by the first flow path and the third flow path by opening the second electromagnetic valve 116, and the second evaporator 115 is used for dehumidifying the drying return air.
As shown in fig. 1 and 2, in some embodiments, the drying module 11 further includes:
and a first four-way valve 117 formed in the first flow path, and the first compressor 112 is connected to the first condenser 111 through the first four-way valve 117.
Specifically, when the first evaporator 113 serving as the outdoor evaporator is used in winter, the problem of frosting exists, switching of heating and cooling of the drying module 11 can be realized by reversing the first four-way valve 117, the first evaporator 113 is defrosted, and the independent defrosting of the drying module 11 also reduces the influence on the operation of the refrigerating module 12 caused by defrosting.
As shown in fig. 1 and 2, in some embodiments, the drying module 11 further includes:
a first gas-liquid separator 118 formed in the first flow path, a refrigerant outlet of the first gas-liquid separator 118 being connected to a refrigerant inlet of the first compressor 112;
a first throttling device 119 formed in the first flow path for adjusting the first refrigerant flowing out of the first condenser 111 during drying.
Specifically, the first throttling device 119 may adopt an electronic expansion valve, and for the functional functions of the first gas-liquid separator 118 and the first throttling device 119, reference may be made to the contents in the related art of cooling and heating, which will not be further described herein.
As shown in fig. 1 and 2, in some embodiments, the refrigeration module 12 includes:
the third evaporator 121 is configured to refrigerate the refrigerated outlet air passing through the third evaporator 121;
a second compressor 122 forming a fourth flow path with the third evaporator 121;
the fourth flow path and the other refrigerant passage 131 in the condenser-evaporator 13 form a closed flow path.
Specifically, the second compressor 122 drives the second refrigerant to circulate through a closed flow path formed by the fourth flow path and the other refrigerant channel 131 of the condenser-evaporator 13, and the third evaporator 121 serves as a refrigerator for refrigerating the outlet air (the arrow of the refrigerator portion in fig. 1 and 2 indicates the direction of the refrigerating air), and cools the passing refrigerating outlet air to control the temperature of the refrigerating space.
In one embodiment, the phase change heat storage material 132 in the condensing evaporator 13 is configured according to the following formula:
Qmax＞MAX(QL2max*tT，(QL2max-QZLmin)*tS)，
wherein Q ismaxRepresents the maximum heat storage amount, Q, of the phase change heat storage material 132 in the condensation evaporator 13L2maxRepresents the maximum heat release, t, of the refrigeration module 12TRepresents the duration of the operation of the drying module 11 in the shutdown phase, QZLminRepresents the minimum evaporating temperature, t, of the condenser-evaporator 13SIndicating the duration of the warm-up phase of the drying module 11.
Specifically, by means of the embodiment, when the condensing evaporator 13 is designed, the phase-change heat storage material 132 in the condensing evaporator 13 has a large enough heat storage capacity, so that the problem that the loads of the drying and the refrigerating are not matched can be solved, for example, the drying heating load is small (for example, the heating load is zero in the drying shutdown stage), the refrigerating and refrigerating load is large (for example, in the cooling stage), the phase-change heat storage material 132 has a large enough heat storage capacity, and in the stage where the drying heating load is small, the heat absorption is sufficient to be continued, so as to store the heat released when the refrigerating and refrigerating load is large.
As shown in fig. 2, in one embodiment, the refrigeration module 12 further comprises:
a second condenser 123 configured as an outdoor condenser;
a third solenoid valve 124 forming a fifth flow path with the second condenser 123;
the fourth flow path also forms a closed flow path with the fifth flow path.
Specifically, the second compressor 122 may drive the second refrigerant to circulate through a closed flow path formed by the fourth flow path and the fifth flow path by opening the second solenoid valve 116, and release heat to the outdoor air by the second condenser 123 serving as an outdoor condenser.
Further, if the phase change heat storage material 132 in the condensing evaporator 13 satisfies the following condition: qmax＜MAX(QL2max*tT，(QL2max-QZLmin)*tS) The refrigeration module 12 is also provided with the fifth flow path;
wherein Q ismaxRepresents the maximum heat storage amount, Q, of the phase change heat storage material 132 in the condensation evaporator 13L2maxRepresents the maximum heat release, t, of the refrigeration module 12TRepresents the duration of the operation of the drying module 11 in the shutdown phase, QZLminRepresents the minimum evaporating temperature, t, of the condenser-evaporator 13SIndicating the duration of the warm-up phase of the drying module 11.
Specifically, in practical applications, due to constraints on size and the like, the condensing evaporator 13 is designed such that the heat storage capacity of the phase-change heat storage material 132 cannot store heat released during the entire cooling stage in some cases (for example, refrigeration is performed during the cooling stage, the refrigeration load is large, accordingly, the amount of heat released to the phase-change heat storage material 132 is also large, drying is performed during the shutdown stage, the heating load is zero, and heat is not absorbed from the phase-change heat storage material 132), and in this case, the fifth flow path described above may be configured to release part of the heat to the outdoor air through the second condenser 123 serving as an outdoor condenser in a specific product.
As shown in fig. 1 and 2, in some embodiments, the refrigeration module 12 further comprises:
and a second four-way valve 125 formed in the fourth flow path, wherein the second compressor 122 is connected to the third evaporator 121 via the second four-way valve 125.
Specifically, the third evaporator 121 serves as a refrigerator for refrigerating air outlet, the refrigerated air outlet passing through is refrigerated, the temperature of a refrigerating space is controlled, the third evaporator may frost itself, refrigeration and heating switching of the refrigerating module 12 can be achieved through reversing of the second four-way valve 125, heat is absorbed from the phase change heat storage material 132 of the condensing evaporator 13, the third evaporator 121 is defrosted, and the independent defrosting of the refrigerating module 12 also reduces the influence on the operation of the drying module 11 due to defrosting.
As shown in fig. 1 and 2, in some embodiments, the refrigeration module 12 further comprises:
a second gas-liquid separator 126 formed in the fourth flow path, and a refrigerant outlet of the second gas-liquid separator 126 is connected to a refrigerant inlet of the second compressor 122;
and a second throttling device 127 formed in the fourth flow path, for adjusting the second refrigerant introduced into the third evaporator 121 during refrigeration.
Similarly, the second throttling device 127 may adopt an electronic expansion valve, and for the functional functions of the second gas-liquid separator 126 and the second throttling device 127, reference may be made to the contents in the related art of cooling and heating, which will not be further described herein.
Fig. 3 is a schematic flow chart of a control method of a drying and refrigerating integrated system according to an embodiment of the present application, where the method is applied to any one of the drying and refrigerating integrated systems described above, as shown in fig. 3, the method includes the following steps:
and step S303, determining a current drying operation stage and a current refrigerating operation stage.
Specifically, in practical applications, the drying may include: a drying temperature rise stage, a drying temperature maintenance stage, a drying shutdown stage and the like, wherein the current drying operation stage can be any one of the stages; the refrigeration may include: a refrigeration cooling stage, a refrigeration temperature maintaining stage and the like, wherein the current refrigeration operation stage can be any one of the stages.
And step S304, judging whether the loads between the current drying operation stage and the current refrigerating operation stage are matched or not.
Specifically, in practical application, the drying and heating stage and the refrigerating and cooling stage can be designed to be matched with each other in load, and when the following conditions occur, the load mismatch between the current drying operation stage and the current refrigerating operation stage can be judged: the current drying operation stage is a drying and heating stage with large heating load, while the current refrigeration operation stage is a refrigeration temperature maintaining stage with small refrigeration load; or, the current drying operation stage is a drying temperature maintaining stage or a drying shutdown stage, the heating load is small or zero, and the current refrigeration operation stage is a refrigeration cooling stage, and the refrigeration load is large.
Step S305, if there is no match, determines whether the heat storage condition of the phase change heat storage material 132 in the condensation evaporator 13 can compensate for the load mismatch therebetween.
Specifically, if it is determined that the load between the current drying operation stage and the current refrigerating operation stage is not matched, it is necessary to further determine whether the heat storage condition of the phase change heat storage material 132 in the condensing evaporator 13 can compensate for the load mismatch between the two stages.
In one embodiment, the determining whether the heat storage condition of the phase change heat storage material 132 in the condensing evaporator 13 can compensate for the load mismatch therebetween if there is no match includes:
if the heating load of the current drying operation stage is not matched with the cooling load of the current refrigerating operation stage, judging whether the heat stored in the phase change heat storage material 132 meets the heating load requirement of the current drying operation stage;
if not, it is judged that the heat storage condition of the phase change heat storage material 132 in the condenser-evaporator 13 cannot compensate for the load mismatch therebetween.
Specifically, under the condition that the heating load of the current drying operation stage is greater than the cooling load of the current refrigerating operation stage, for example, the current drying operation stage is a drying and heating stage and has a large heating load, while the current refrigerating operation stage is a refrigerating and temperature maintaining stage and has a small cooling load, and mismatching of loads is formed. In this case, if the drying heat cannot obtain sufficient heat from the phase-change heat storage material 132, it indicates that the heat stored in the phase-change heat storage material 132 cannot compensate for the mismatch therebetween.
Further, the determining whether the heat stored in the phase change heat storage material 132 meets the heating load requirement of the current drying operation stage includes:
when the value obtained by subtracting the evaporation temperature of the condensing evaporator 13 from the phase change temperature of the phase change heat storage material 132 in the condensing evaporator 13 exceeds a first preset threshold, it is determined that the heat stored in the phase change heat storage material 132 cannot meet the heating load requirement of the current drying operation stage.
Specifically, in practical applications, the phase-change thermal storage material 132 may be selected to have a solid-liquid phase-change temperature TXA material close to the average of the high-efficiency low-pressure temperature (obtained according to the target drying temperature) of the drying module 11 and the high-efficiency high-pressure temperature (obtained according to the target refrigerating temperature) of the refrigerating module 12, and the condensing temperature T of the condensing evaporator 13LThe evaporation temperature T of the condenser-evaporator 13ZIt can be set when T is detectedX-TZWhen the temperature is higher than 2 ℃, the heat stored in the phase change heat storage material 132 is judged to be incapable of meeting the heating load requirement in the current drying operation stage.
In another embodiment, the determining whether the heat storage condition of the phase change heat storage material 132 in the condensing evaporator 13 can compensate for the load mismatch therebetween if there is no match includes:
if the mismatch that the refrigeration load of the current refrigeration operation stage is larger than the heating load of the current drying operation stage is formed, judging whether the heat absorption and storage of the phase-change heat storage material 132 can meet the refrigeration load requirement of the current refrigeration operation stage;
if not, it is judged that the heat storage condition of the phase change heat storage material 132 in the condenser-evaporator 13 cannot compensate for the load mismatch therebetween.
Specifically, under the condition that the refrigeration load of the current refrigeration operation stage is greater than the heating load of the current drying operation stage, for example, the current refrigeration operation stage is a refrigeration cooling stage, the refrigeration load is large, the current drying operation stage is a drying shutdown stage, the heating load is zero, and mismatching of the loads is formed. In this case, if the phase-change heat storage material 132 cannot store the heat released during the entire temperature-decreasing period, it indicates that the heat stored in the phase-change heat storage material 132 cannot compensate for the mismatch therebetween.
Further, determining whether the heat absorption and storage of the phase change heat storage material 132 meet the refrigeration load requirement of the current refrigeration operation stage includes:
when the value obtained by subtracting the phase change temperature of the phase change heat storage material 132 in the condensation evaporator 13 from the condensation temperature of the condensation evaporator 13 exceeds a second preset threshold value, it is determined that the heat absorption and storage of the phase change heat storage material 132 cannot meet the refrigeration load requirement of the current refrigeration operation stage.
Specifically, referring to the above-described selection of the phase change heat storage material 132 according to the phase change temperature, when T is detectedL-TXWhen the temperature is higher than 2 ℃, the heat absorption and storage of the phase change heat storage material 132 are judged to be incapable of meeting the refrigeration load requirement of the current refrigeration operation stage.
And step S306, if the load can not be matched, carrying out load matching control between the two.
In one embodiment, if the load matching cannot be performed, performing the load matching control between the two includes:
and controlling the operation of the outdoor evaporator in the drying module 11.
Specifically, in this embodiment, in response to the case that the heat stored in the phase change heat storage material 132 in the condensing evaporator 13 cannot satisfy the drying and heating load, referring to fig. 1 and 2, the first compressor 112 may drive the first refrigerant to circulate in the closed flow path formed by the first flow path and the second flow path by opening the first electromagnetic valve 114, and the first evaporator 113 serving as an outdoor evaporator may absorb heat from the outside air to supplement the drying and heating load.
In another embodiment, said if not, performing said inter-load matching control comprises:
the operation of the outdoor condenser in the refrigeration module 12 is controlled.
Specifically, in this embodiment, in response to the situation that the heat absorption and storage of the phase change heat storage material 132 cannot meet the cooling load requirement of the current refrigeration operation stage, referring to fig. 1 and 2, by opening the second electromagnetic valve 116, the second compressor 122 may further drive the second refrigerant to circulate in the closed flow path formed by the fourth flow path and the fifth flow path, and release part of the heat to the outdoor air by using the second condenser 123 as an outdoor condenser, so as to relieve the heat absorption and storage pressure of the phase change heat storage material 132.
Fig. 4 is a schematic flow chart of a control method of a drying and refrigerating integrated system according to another embodiment of the present application, where the method is applied to any one of the drying and refrigerating integrated systems described above, as shown in fig. 4, the method includes the following steps:
and S301, acquiring the drying temperature of the drying space and the refrigerating temperature of the refrigerating space.
Specifically, for example, the drying room forms a drying space, and the refrigeration room forms a refrigeration space, a temperature sensor may be respectively disposed in the drying room and the refrigeration room, so as to respectively detect and obtain the drying temperature THAnd the refrigeration temperature TC。
And S302, performing drying operation stage control according to the drying temperature, and performing refrigeration operation stage control according to the refrigeration temperature.
Further, the performing of the drying operation stage control according to the drying temperature and the performing of the refrigerating operation stage control according to the refrigerating temperature includes:
performing drying operation stage control according to the relation between the drying temperature and a preset target drying temperature; and
and performing refrigeration operation stage control according to the relationship between the refrigeration temperature and a preset target refrigeration temperature.
Specifically, it should be practicallyIn use, the drying may include: a drying temperature rise stage, a drying temperature maintenance stage, a drying shutdown stage and the like; the refrigeration may include: a cold storage cooling stage, a cold storage temperature maintaining stage and the like. Setting a target drying temperature TH targetAnd target refrigeration temperature TC target。
For drying, materials in the drying room periodically flow in batches, the operation of the drying system can be divided into three stages, namely a drying temperature rise stage, a drying temperature maintenance stage and a drying shutdown stage (replacing material batches). The drying process of the same drying material is the same, the time of each stage is a controllable fixed value, and the following control can be carried out:
when T isH target-THWhen the temperature is higher than 1 ℃, the drying temperature rise stage control is carried out, the drying load is higher in the stage, the operating frequency X1 of the first compressor 112 is increased by 1Hz, and the duration of the stage is longer (fixed as t)S)。
When T isH target-THWhen the temperature is less than or equal to 1 ℃, the drying temperature maintaining stage is controlled, the drying load is smaller at the stage, and the temperature reaches TH target-THBefore the temperature is more than or equal to-1 ℃, the operating frequency of the first compressor 112 is not changed when T is reachedH target-THAt < -1 ℃, the first compressor 112 operating frequency X1 is reduced by 1 Hz; this phase is of longer duration (fixed at t)W)。
A drying shutdown phase, in which the drying cycle is completed and the first compressor 112 is shut down to replace the material, which is short in duration (fixed at t)T)。
For cold storage, the material fluidity in the cold storage is low, the single flow is small, the cycle rule is not obvious, the cold storage system can be divided into a cold storage cooling stage and a cold storage temperature maintaining stage, the time of each stage is not fixed, and the following control can be performed:
when T isC-TC targetAnd when the temperature is higher than 1 ℃, the control is carried out in a refrigeration cooling stage, the refrigeration load is higher in the stage, the operation frequency X2 of the second compressor 122 is increased by 1Hz, and the duration is short (unfixed).
When T isC-TC targetWhen the temperature is less than or equal to 1 ℃, the control is carried out in a refrigeration temperature maintaining stage, and the refrigeration load is smaller in the stage; at the time of reaching TC-TMesh CSign boardBefore the temperature is more than or equal to-1 ℃, the operating frequency of the second compressor 122 is unchanged; when T is reachedC-TC targetAt < -1 ℃, the operating frequency X2 of the second compressor 122 is reduced by 1Hz and is not changed, and the duration is long (unfixed).
According to the relation between the drying temperature and the preset target drying temperature and the relation between the refrigerating temperature and the preset target refrigerating temperature, the drying and refrigerating are correspondingly controlled, accurate control is facilitated, and the energy efficiency is improved.
And step S303, determining a current drying operation stage and a current refrigerating operation stage.
And step S304, judging whether the loads between the current drying operation stage and the current refrigerating operation stage are matched or not.
Step S305, if there is no match, determines whether the heat storage condition of the phase change heat storage material 132 in the condensation evaporator 13 can compensate for the load mismatch therebetween.
And step S306, if the load can not be matched, carrying out load matching control between the two.
For the above steps S303 to S306, the corresponding descriptions have been already made in the above related embodiments, and corresponding references can be obtained, which are not further described herein.
Fig. 5 is a schematic structural diagram of a drying and refrigerating integrated system according to another embodiment of the present application, and as shown in fig. 5, the drying and refrigerating integrated system 5 includes:
one or more memories 501 having executable programs stored thereon;
one or more processors 502 for executing the executable programs in the memory 501 to implement the steps of any of the methods described above.
With regard to the drying and refrigerating integrated system in the above embodiment, the specific manner of executing the program in the memory by the processor has been described in detail in the embodiment related to the method, and will not be elaborated here.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, the meaning of "plurality" means at least two unless otherwise specified.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. Further, "connected" as used herein may include wirelessly connected. The term "and/or" is used to include any and all combinations of one or more of the associated listed items.
Any process or method descriptions in flow charts or otherwise described herein may be understood as: represents modules, segments or portions of code which include one or more executable instructions for implementing specific logical functions or steps of a process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (12)
1. The utility model provides a stoving cold-stored integrative system which characterized in that includes:
the drying module is used for heating the drying space by utilizing the heat release of the first refrigerant;
the refrigerating module is used for refrigerating the refrigerating space by utilizing the heat absorption of the second refrigerant;
a condensing evaporator comprising: the condensing evaporator is respectively connected with the drying module and the refrigerating module through the two refrigerant channels, so that when the first refrigerant and the second refrigerant respectively flow through the condensing evaporator, the first refrigerant and the second refrigerant respectively exchange heat with the phase-change heat storage material in the condensing evaporator.
2. The system of claim 1, wherein the drying module comprises:
the first condenser is used for heating the dried air outlet passing through the first condenser;
a first compressor forming a first flow path with the first condenser;
the first flow path and one refrigerant channel of the condensing evaporator form a closed flow path.
3. The system of claim 2, wherein the drying module further comprises:
a first evaporator configured as an outdoor evaporator;
a first solenoid valve forming a second flow path with the first evaporator;
the first flow path also forms a closed flow path with the second flow path.
4. The system of claim 2, wherein the drying module further comprises:
the second evaporator is used for dehumidifying the drying return air;
a second solenoid valve forming a third flow path with the second evaporator;
the first flow path and the third flow path also form a closed flow path.
5. The system of claim 2, wherein the drying module further comprises:
and a first four-way valve formed in the first flow path, and the first compressor is connected to the first condenser through the first four-way valve.
6. The system of claim 2, wherein the drying module further comprises:
and a first gas-liquid separator formed in the first flow path, wherein a refrigerant outlet of the first gas-liquid separator is connected with a refrigerant inlet of the first compressor.
7. The system of claim 2, wherein the drying module further comprises:
and the first throttling device is formed in the first flow path and is used for adjusting the first refrigerant flowing out of the first condenser during drying.
8. The system of any one of claims 1-7, wherein the refrigeration module comprises:
the third evaporator is used for refrigerating the cold storage air outlet passing through the third evaporator;
a second compressor forming a fourth flow path with the third evaporator;
the fourth flow path and the other refrigerant channel in the condensation evaporator form a closed flow path.
9. The system of claim 8, wherein the refrigeration module further comprises:
a second condenser configured as an outdoor condenser;
a third electromagnetic valve forming a fifth flow path with the second condenser;
the fourth flow path also forms a closed flow path with the fifth flow path.
10. The system of claim 8, wherein the refrigeration module further comprises:
and a second four-way valve formed in the fourth flow path, the second compressor being connected to the third evaporator through the second four-way valve.
11. The system of claim 8, wherein the refrigeration module further comprises:
and a second gas-liquid separator formed in the fourth flow path, a refrigerant outlet of the second gas-liquid separator being connected to a refrigerant inlet of the second compressor.
12. The system of claim 8, wherein the refrigeration module further comprises:
and the second throttling device is formed in the fourth flow path and is used for adjusting the second refrigerant entering the third evaporator during refrigeration.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110715467A (en) * | 2019-10-30 | 2020-01-21 | 珠海格力电器股份有限公司 | Drying and refrigerating integrated system and control method |
| CN115978879A (en) * | 2023-03-21 | 2023-04-18 | 昆明理工大学 | High-efficient roast room-freezer coupled system |
| CN116601443A (en) * | 2020-12-01 | 2023-08-15 | 大金工业株式会社 | Refrigeration cycle system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110715467A (en) * | 2019-10-30 | 2020-01-21 | 珠海格力电器股份有限公司 | Drying and refrigerating integrated system and control method |
| CN116601443A (en) * | 2020-12-01 | 2023-08-15 | 大金工业株式会社 | Refrigeration cycle system |
| CN115978879A (en) * | 2023-03-21 | 2023-04-18 | 昆明理工大学 | High-efficient roast room-freezer coupled system |
| CN115978879B (en) * | 2023-03-21 | 2023-06-13 | 昆明理工大学 | Efficient curing barn-freezer coupling system |
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