CN113819750A - Heat pump drying unit with sterilization function and control method thereof - Google Patents

Heat pump drying unit with sterilization function and control method thereof Download PDF

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Publication number
CN113819750A
CN113819750A CN202110824631.5A CN202110824631A CN113819750A CN 113819750 A CN113819750 A CN 113819750A CN 202110824631 A CN202110824631 A CN 202110824631A CN 113819750 A CN113819750 A CN 113819750A
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China
Prior art keywords
temperature
air
heat pump
valve
compressor
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CN202110824631.5A
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Chinese (zh)
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CN113819750B (en
Inventor
林创辉
张学伟
贠潇
徐鹏华
张晓艳
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Guangdong Shenling Environmental Systems Co Ltd
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Guangdong Shenling Environmental Systems Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/08—Radiation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
    • F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/003—Supply-air or gas filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/08—Humidity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/10—Temperature; Pressure

Abstract

The invention discloses a heat pump drying unit with a sterilization function and a control method thereof, wherein the heat pump drying unit comprises a control device, a hot water coil, an air treatment device, a heat pump device and a sterilization mechanism; the hot water coil and the sterilization mechanism are respectively arranged in the drying chamber, and the air treatment device is used for outputting high-temperature air to the drying chamber; the heat pump device comprises a compressor and a heat exchanger, the output end of the compressor is connected with the first port of the heat exchanger, the air treatment device is respectively connected with the second port of the heat exchanger and the input end of the compressor, the third port and the fourth port of the heat exchanger are respectively connected with the hot water coil, and the heat exchanger is used for conveying a high-temperature heat source to the hot water coil; the heat pump drying unit disclosed by the application can provide hot water and hot air for the drying chamber to dry products, namely two drying modes are adopted for drying simultaneously, so that the drying efficiency is greatly improved; the drying chamber is internally provided with a sterilization mechanism, so that the cleanliness of the dried product can be improved.

Description

Heat pump drying unit with sterilization function and control method thereof
Technical Field
The invention relates to the technical field of heat pump drying units, in particular to a heat pump drying unit with a sterilization function and a control method thereof.
Background
The existing single hot air heat pump drying unit has the problems of low drying efficiency and long drying time if the drying difficulty of the articles to be dried is high and the articles are dried only by hot air, and the working energy consumption of the hot air heat pump drying unit is greatly improved due to the overlong drying time; if the drying time is too short, the problem that the actual drying effect of the articles cannot meet the drying requirement can occur.
In addition, the existing heat pump drying unit generally does not have a sterilization function, and bacteria and germs can be bred in the drying process of products such as food, medicines and the like, so that the products are polluted, and the yield of the products is reduced.
It is seen that improvements and enhancements to the prior art are needed.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a heat pump drying unit with a sterilization function, wherein hot water drying and hot air drying are adopted for simultaneous drying, so that the drying efficiency can be greatly improved, and the cleanliness of a dried product can be improved by arranging a sterilization mechanism.
In order to achieve the purpose, the invention adopts the following technical scheme:
a heat pump drying unit with a sterilization function comprises a control device, a hot water coil, an air treatment device, a heat pump device and a sterilization mechanism; the hot water coil and the sterilization mechanism are respectively arranged in the drying chamber, the air treatment device is connected with the drying chamber through a pipeline, and the air treatment device is used for outputting high-temperature air to the drying chamber; the heat pump device comprises a compressor and a heat exchanger, the output end of the compressor is connected with the first port of the heat exchanger, the air treatment device is respectively connected with the second port of the heat exchanger and the input end of the compressor, the third port and the fourth port of the heat exchanger are respectively connected with the hot water coil pipe, and the heat exchanger is used for conveying a high-temperature heat source to the hot water coil pipe; the air treatment device, the heat pump device and the sterilization mechanism are respectively electrically connected with the control device.
The heat pump drying unit also comprises a first temperature sensor, a second temperature sensor, a first humidity sensor, a second humidity sensor, a third temperature sensor and a delivery pump which are respectively and electrically connected with the control device; the first temperature sensor is used for detecting the inlet air temperature of the air treatment device, and the first humidity sensor is used for detecting the inlet air humidity of the air treatment device; the second temperature sensor is used for detecting the air outlet temperature of the air treatment device, and the second humidity sensor is used for detecting the air outlet humidity of the air treatment unit; the third temperature sensor and the delivery pump are arranged on a first pipeline from the heat exchanger to the hot water coil pipe, and the third temperature sensor is used for detecting the temperature of the heat source output by the heat exchanger.
The heat pump drying unit is characterized in that the air treatment device comprises a shell, an air filter, a heat recovery rotating wheel evaporation end, an evaporator, a fan, a heat recovery rotating wheel condensation end and an electric heater are sequentially arranged in the shell along the air inlet and outlet directions, and the fan, the electric heater and the heat recovery rotating wheel are respectively and electrically connected with the control device.
In the heat pump drying unit, the heat pump device also comprises a drying filter, an expansion valve and a gas-liquid separator; the second port of the heat exchanger is connected with the input end of the dry filter, the output end of the dry filter is connected with the input end of the expansion valve, the output end of the expansion valve is connected with the input end of the evaporator, the output end of the evaporator is connected with the input end of the gas-liquid separator, and the output end of the gas-liquid separator is connected with the input end of the compressor.
The heat pump drying unit also comprises a regulating valve and a bypass valve; an auxiliary surface cooler and an oil cooler are also arranged in the shell; the auxiliary surface air cooler is arranged on the air outlet side of the evaporator, and the regulating valve is connected with an interface of the auxiliary surface air cooler; the oil cooler is arranged on the air outlet side of the electric heater, an inlet pipe of the oil cooler is connected with an oil way outlet of the compressor, and an outlet pipe of the oil cooler is connected with an oil way inlet of the compressor; one end of the bypass valve is connected with the inlet pipe, and the other end of the bypass valve is connected with the outlet pipe; the regulating valve and the bypass valve are respectively electrically connected with the control device.
In the heat pump drying unit, the heat pump device further comprises a first on-off valve, a first throttling device, a second on-off valve and a second throttling device; one end of the first on-off valve is connected with the low-pressure liquid spraying port of the compressor through the first throttling device, and the other end of the first on-off valve is respectively connected with the output end of the drying filter and the input end of the expansion valve; one end of the second on-off valve is connected with the middle liquid spraying port of the compressor through the second throttling device, and the other end of the second on-off valve is connected with the output end of the drying filter and the input end of the expansion valve respectively.
In the heat pump drying unit, the sterilizing mechanism comprises a sterilizing lamp and an electrostatic sterilizing device which are respectively and electrically connected with the control device, the sterilizing lamp is arranged at the top of the drying chamber, and the electrostatic sterilizing device is arranged on the inner walls of the left side and the right side of the drying chamber.
The invention also correspondingly provides a control method of the heat pump drying unit with the sterilization function, and the control method is used for realizing the working control of any one of the heat pump drying units; the control method specifically comprises the following steps:
the control device obtains a real-time inlet air temperature T10 fed back by the first temperature sensor and a real-time outlet water temperature T30 fed back by the third temperature sensor;
when the real-time air inlet temperature T10 is greater than or equal to the preset preheating starting temperature T11 and less than the preset preheating stopping temperature T12, the control device starts the fan firstly and then starts the electric heater;
when the real-time air inlet temperature T10 is greater than or equal to the preset preheating stop temperature T12, the control device controls the electric heater to stop working and controls the sterilization mechanism to start working; the control device respectively compares the T10 with the preset inlet air temperature T13 and the first temperature accuracy delta T13 and compares the T30 with the preset outlet water temperature T31 and the outlet water accuracy delta T31;
and the control device adjusts the working states of the compressor, the fan and the heat recovery rotating wheel according to the comparison result.
In the control method, the heat pump drying unit further comprises a fifth temperature sensor electrically connected with the control device, and the fifth temperature sensor is used for detecting the air inlet temperature of the condensation end of the heat recovery rotating wheel; an auxiliary surface air cooler is further arranged in the shell and arranged on the air outlet side of the evaporator, and an interface of the auxiliary surface air cooler is connected with the regulating valve; the control method further comprises the steps of:
the control device acquires real-time air inlet temperature T50 fed back by the fifth temperature sensor in real time and compares the T50 with preset air inlet temperature T51 and fifth temperature precision delta T51 respectively;
and the control device adjusts the working states of the compressor and the auxiliary surface cooler according to the comparison result.
In the control method, the heat pump device further comprises an expansion valve, a gas-liquid separator, a first on-off valve, a second on-off valve and an exhaust temperature sensor, and the air treatment device further comprises an oil cooler; the compressor, the expansion valve and the gas-liquid separator are connected end to end; the compressor is connected with the oil cooler through a bypass valve, and the first on-off valve is arranged on a connecting pipeline between a low-pressure liquid spraying opening of the compressor and the expansion valve; the second on-off valve is arranged on a connecting pipeline between a middle liquid spraying port of the compressor and the expansion valve; the control method further comprises the steps of:
the control device acquires an exhaust temperature value T0 fed back by the exhaust temperature sensor in real time, and compares the value between T0 and a preset first action temperature T01 and a first reset temperature T02 respectively;
the control device adjusts the on-off state of the bypass valve according to the comparison result.
Has the advantages that:
the invention provides a heat pump drying unit with a sterilization function, wherein a hot water coil is arranged in a drying chamber, a product to be dried positioned on the surface of the hot water coil exchanges heat with a heat source in the hot water coil to realize drying, and an air treatment device simultaneously conveys high-temperature air into the drying chamber to dry an object, namely, the drying chamber simultaneously dries the object by adopting two modes of hot water drying and hot air drying, so that the drying efficiency is greatly improved, the drying time is saved, the object is ensured to be effectively dried, and the use experience of a user is improved; in addition, still be provided with the mechanism of disinfecting in the drying chamber, can disinfect the stoving product, avoid the stoving product to breed the bacterium, improve the cleanliness factor of stoving product to improve the yields of stoving product.
Drawings
Fig. 1 is a schematic structural diagram of a heat pump drying unit provided by the invention;
fig. 2 is a system structure diagram of a heat pump drying unit provided by the invention;
FIG. 3 is a first logic flow diagram of a control method provided by the present invention;
FIG. 4 is a second logic flow diagram of the control method provided by the present invention;
FIG. 5 is a third logic flow diagram of a control method provided by the present invention;
fig. 6 is a fourth logic flow diagram of the control method provided by the present invention.
Description of the main element symbols: 1-control device, 2-drying chamber, 21-hot water coil, 211-delivery pump, 22-sterilizing lamp, 23-electrostatic sterilizing device, 3-shell, 31-air filter, 32-heat recovery rotating wheel, 33-evaporator, 34-fan, 35-electric heater, 36-auxiliary surface cooler, 361-regulating valve, 37-oil cooler, 371-bypass valve, 41-compressor, 42-heat exchanger, 43-drying filter, 44-expansion valve, 45-gas-liquid separator, 461-first on-off valve, 462-first throttling device, 471-second on-off valve, 472-second throttling device, 481-high-pressure protector, 482-exhaust pressure sensor, 491-low-pressure protector, 211-auxiliary surface cooler, 36-auxiliary surface cooler, 361-regulating valve, 37-oil cooler, 371-bypass valve, 41-compressor, 42-heat exchanger, 43-drying filter, 44-expansion valve, 45-gas-liquid separator, 461-first on-off valve, 462-first throttling device, 471-second throttling device, 491-high-pressure protector, 482-exhaust pressure sensor, 491-low-pressure protector, 211-low-pressure protector, etc, 492-suction pressure sensor, 51-first temperature sensor, 52-second temperature sensor, 53-first humidity sensor, 54-second humidity sensor, 55-third temperature sensor, 56-discharge temperature sensor, 57-fifth temperature sensor, 6-display operation panel.
Detailed Description
The invention provides a heat pump drying unit with a sterilization function and a control method thereof, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail by referring to the attached drawings and embodiments.
In the description of the present invention, it is to be understood that the terms "left", "right", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, and should not be construed as limiting the present invention; in addition, the terms "mounted," "connected," and the like are to be construed broadly, and those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.
Referring to fig. 1 and 2, the present invention provides a heat pump drying unit with sterilization function, which includes a control device 1, a hot water coil 21, an air processing device, a heat pump device and a sterilization mechanism; the hot water coil 21 and the sterilization mechanism are respectively arranged in the drying chamber 2, the air treatment device is connected with the drying chamber 2 through a pipeline, and the air treatment device is used for outputting high-temperature air to the drying chamber 2; the heat pump device comprises a compressor 41 and a heat exchanger 42, wherein the output end of the compressor 41 is connected with the first port of the heat exchanger 42, the air treatment device is respectively connected with the second port of the heat exchanger 42 and the input end of the compressor 41, the third port and the fourth port of the heat exchanger 42 are respectively connected with the hot water coil 21, and the heat exchanger 42 is used for conveying a high-temperature heat source to the hot water coil 21; the air treatment device, the heat pump device and the sterilization mechanism are respectively electrically connected with the control device 1.
According to the heat pump drying unit, the hot water coil 21 is arranged in the drying chamber 2, a product to be dried on the surface of the hot water coil 21 exchanges heat with a heat source in the hot water coil 21 to realize drying, the air treatment device simultaneously conveys high-temperature air into the drying chamber 2 to dry an object, namely, the drying chamber 2 simultaneously dries the object by adopting two modes of heat source drying and hot air drying, so that the drying efficiency is greatly improved, the drying time is saved, the object is ensured to be effectively dried, and the use experience of a user is improved; the hot water coil 21 is connected with the heat exchanger 42, so that the heat of the refrigerant output by the compressor 41 can be fully utilized, the energy utilization rate is improved, and the overall energy consumption of the heat pump drying unit is reduced; in addition, still be provided with the mechanism of disinfecting in the drying chamber 2, can disinfect the stoving product, avoid the air that air treatment device input to carry the bacterium and lead to treating the stoving product and breed the bacterium, improve the cleanliness factor of stoving product to improve the yields of stoving product.
In other embodiments, the sterilization mechanism set up in air treatment facilities's air-out side, promptly the bactericidal lamp and static sterilizing equipment set up in air treatment facilities's air-out side can carry the air to the drying chamber to air treatment facilities and disinfect the disinfection, avoids high temperature air to carry the bacterium and leads to the product of treating the stoving to be polluted, improves the cleanliness factor of stoving product.
Further, referring to fig. 1 and fig. 2, the heat pump dryer group further includes a first temperature sensor 51, a second temperature sensor 52, a first humidity sensor 53, a second humidity sensor 54, a third temperature sensor 55 and a delivery pump 211, which are electrically connected to the control device 1, respectively; the first temperature sensor 51 is used for detecting the inlet air temperature of the air treatment device, and the first humidity sensor 53 is used for detecting the inlet air humidity of the air treatment device; the second temperature sensor 52 is configured to detect an outlet air temperature of the air processing device, and the second humidity sensor 54 is configured to detect an outlet air humidity of the air processing unit; the third temperature sensor 55 and the delivery pump 211 are arranged on a first pipeline of the heat exchanger 42 outputting a heat source to the hot water coil 21, and the third temperature sensor 55 is used for detecting the temperature of the heat source output by the heat exchanger 42; the delivery pump 211 is used for delivering the heat source from the heat exchanger 42 to the hot water coil 21; in one embodiment, the first temperature sensor 51 and the first humidity sensor 53 are disposed on the air outlet side of the air filter 31, and the second temperature sensor 52 and the second humidity sensor 54 are disposed on the air outlet side of the oil cooler 37.
In the actual operation process of the heat pump drying unit, the control device 1 may adjust the operation states of the compressor 41, the delivery pump 211, the heat recovery wheel 32 and the fan 34 according to the real-time data fed back by the first temperature sensor 51, the second temperature sensor 52 and the third temperature sensor 55.
Further, referring to fig. 1 and 2, the air treatment device includes a housing 3, an air filter 31, a heat recovery wheel evaporation end, an evaporator 33, a fan 34, a heat recovery wheel condensation end, and an electric heater 35 are sequentially disposed in the housing 3 along an air inlet and outlet direction, and the fan 34, the electric heater 35, and the heat recovery wheel 32 are respectively electrically connected to the control device 1; the return air that drying chamber 2 was exported passes through the air intake that sets up on casing 3 and gets into in the casing 3, the air carries out filtration treatment through air cleaner 31 earlier, in order to improve the clean degree of air, and then the evaporating terminal through heat recovery runner 32, the heat of the evaporating terminal recovery air of heat recovery runner 32 and cool down to the air, the air after preliminary cooling passes through evaporimeter 33 cooling dehumidification back again, wind-force effect through fan 34, flow to the condensing end of heat recovery runner 32 and carry out preliminary heating up, flow to electric heater 35 and do further heat treatment, return to drying chamber 2 again through the air outlet of setting up on casing 3 at last.
The heat pump drying unit comprises a heat recovery rotating wheel 32, wherein the evaporation end of the heat recovery rotating wheel 32 is used for pre-cooling air, so that the working energy consumption of an evaporator 33 can be reduced, namely the working energy consumption of the heat pump drying unit is reduced; the condensing end of the heat recovery runner 32 can preheat the gas by using the heat recovered by the evaporating end, so that the energy utilization rate is improved, and the working energy consumption of the heat pump drying unit is further reduced.
Further, referring to fig. 1 and 2, the heat pump apparatus further includes a dry filter 43, an expansion valve 44, and a gas-liquid separator 45; a second port of the heat exchanger 42 is connected to an input end of the dry filter 43, an output end of the dry filter 43 is connected to an input end of the expansion valve 44, an output end of the expansion valve 44 is connected to an input end of the evaporator 33, an output end of the evaporator 33 is connected to an input end of the gas-liquid separator 45, and an output end of the gas-liquid separator 45 is connected to an input end of the compressor 41; the high-temperature refrigerant output by the compressor 41 enters the heat exchanger 42 and is then conveyed into the hot water coil 21 through the conveying pump 211, the high-temperature refrigerant exchanges heat with the product to be dried in the hot water coil 21, the cooled refrigerant returns to the heat exchanger 42 and then sequentially passes through the drying filter 43 and the expansion valve 44, and then enters the evaporator 33; the refrigerant having absorbed heat in the evaporator 33 returns to the compressor 41 through the gas-liquid separator 45, and the refrigerant is circulated; the hot water coil 21 fully recovers the heat of the refrigerant to dry the product, and the energy utilization rate is improved.
Further, referring to fig. 1 and 2, the heat pump dryer group further includes a regulating valve 361 and a bypass valve 371; an auxiliary surface cooler 36 and an oil cooler 37 are also arranged in the shell 3; the auxiliary surface cooler 36 is arranged on the air outlet side of the evaporator 33, and the regulating valve 361 is connected with an interface of the auxiliary surface cooler 36; the oil cooler 37 is arranged on the air outlet side of the electric heater 35, an inlet pipe of the oil cooler 37 is connected with an oil path outlet of the compressor 41, and an outlet pipe of the oil cooler 37 is connected with an oil path inlet of the compressor 41; one end of the bypass valve 371 is connected with the inlet pipe, and the other end is connected with the outlet pipe; the regulating valve 361 and the bypass valve 371 are respectively electrically connected with the control device 1; the auxiliary surface cooler 36 is arranged to cool the air, so that the working energy consumption of the evaporator 33 during cooling and dehumidifying the air can be reduced, and the working energy consumption of the heat pump drying unit is reduced; set up oil cooler 37, heat the air through the high temperature lubricating oil that compressor 41 exported, can reduce the lubricating oil temperature, avoid compressor 41 high temperature to shut down, and can further heat the air, improved energy utilization and rateed, further reduced heat pump drying unit's work energy consumption.
Further, referring to fig. 1 and fig. 2, the heat pump apparatus further includes a first on-off valve 461, a first throttling device 462, a second on-off valve 471 and a second throttling device 472; one end of the first on-off valve 461 is connected to the low-pressure liquid injection port of the compressor 41 through the first throttle device 462, and the other end of the first on-off valve 461 is connected to the output end of the dry filter 43 and the input end of the expansion valve 44, respectively; one end of the second on-off valve 471 is connected to the middle liquid injection port of the compressor 41 through the second throttling device 472, and the other end of the second on-off valve 471 is connected to the output end of the dry filter 43 and the input end of the expansion valve 44, respectively.
Further, referring to fig. 1 and 2, the heat pump apparatus further includes a high-pressure protector 481, a discharge pressure sensor 482, a low-pressure protector 491 and a suction pressure sensor 492 which are electrically connected to the control apparatus 1, respectively, wherein the high-pressure protector 481 and the discharge pressure sensor 482 are disposed on a connection pipeline between the compressor 41 and the first port of the heat exchanger 42; the low pressure protector 491 and the suction pressure sensor 492 are provided on a connection pipe between the gas-liquid separator 45 and the compressor 41.
Further, referring to fig. 1 and fig. 2, the heat pump apparatus further includes an exhaust temperature sensor 56 electrically connected to the control apparatus 1, the exhaust temperature sensor 56 is configured to detect an exhaust temperature of the compressor 41, and the exhaust temperature sensor 56 is disposed on a connection pipeline between the compressor 41 and the high-voltage protector 481; the control device 1 may adjust the on-off states of the first on-off valve 461, the second on-off valve 471 and the bypass valve 371 according to real-time data fed back by the exhaust temperature sensor 56.
Further, referring to fig. 1 and 2, the sterilization mechanism includes a sterilization lamp 22 and an electrostatic sterilization device 23 electrically connected to the control device 1, respectively, the sterilization lamp 22 is disposed on the top of the drying chamber 2, and the electrostatic sterilization device 23 is disposed on the inner walls of the left and right sides of the drying chamber 2; when the heat pump drying unit carries out the drying task, the control device 1 controls the sterilizing lamp 22 and the electrostatic sterilizing device 23 to work simultaneously so as to sterilize the dried product and improve the cleanliness of the product.
Referring to fig. 3 to fig. 6, the present invention further provides a control method of a heat pump dryer group with a sterilization function, where the control method is used to implement the operation control of any one of the heat pump dryer groups; the control method specifically comprises the following steps:
s100, the control device 1 obtains a real-time inlet air temperature T10 fed back by the first temperature sensor 51 and a real-time outlet water temperature T30 fed back by the third temperature sensor 55;
s200, when the real-time air inlet temperature T10 is greater than or equal to a preset preheating starting temperature T11 and smaller than a preset preheating stopping temperature T12, the control device 1 starts the fan 34 firstly and then starts the electric heater 35; the lowest temperature for starting and operating the high-temperature heat pump drying unit is generally above 25 ℃, and when the environmental temperature is low, the situation that the heat pump drying unit cannot be normally started may occur; the application discloses heat pump drying unit can preheat earlier when ambient temperature is lower and carry out the stoving task again, ensures that heat pump drying unit can normal boot, improves the stability and the reliability of heat pump drying unit during operation.
S300, when the real-time air inlet temperature T10 is greater than or equal to the preset preheating stop temperature T12, the control device 1 controls the electric heater 35 to stop working and controls the sterilization mechanism to start working; the control device 1 compares the value between the T10 and the preset inlet air temperature T13 and the first temperature accuracy delta T13 and the value between the T30 and the preset outlet water temperature T31 and the outlet water accuracy delta T31 respectively; in one embodiment, the heat pump dryer group further includes a display operation panel 6 electrically connected to the control device 1, and a user or a worker may input the sizes of T11, T12, T13, Δ T13, T31, and Δ T31 into the control device 1 in advance according to the working condition, working environment, and the like of the coupled heat pump dryer group through the display operation panel 6.
S400, the control device 1 adjusts the working states of the compressor 41, the fan 34 and the heat recovery runner 32 according to the comparison result; in an embodiment, referring to fig. 1 and fig. 3, the step S400 specifically includes the steps of:
s410, if T13-delta T13 is not less than T10 is not less than T13+ delta T13, the control device 1 controls the fan 34, the heat recovery runner 32 and the compressor 41 to keep the original working state; specifically, the control device 1 adjusts the working state of the fan 34 through a fan 34 rotation speed regulator;
s420, if T10 is more than T13+ delta T13, the control device 1 firstly controls the fan 34 to load, when the fan 34 is loaded to be consistent with a preset maximum fan loading value, the control device 1 controls the heat recovery runner 32 to gradually reduce the rotating speed, and when the rotating speed of the heat recovery runner 32 is consistent with a preset minimum rotating speed, the control device 1 controls the compressor 41 to unload;
and S430, if T10 is less than T13-delta T13, the control device 1 firstly controls the compressor 41 to load, when the compressor 41 is loaded to be consistent with a preset maximum loading value of the compressor, the control device 1 controls the heat recovery rotating wheel 32 to gradually increase the rotating speed, and when the rotating speed of the heat recovery rotating wheel 32 is consistent with a preset maximum rotating speed, the control device 1 controls the fan 34 to unload so as to adjust the heating effect of the heat pump drying unit on the air.
S440, if T31-delta T31 is more than or equal to T30 is more than or equal to T31+ delta T31, the control device 1 controls the compressor 41 and the delivery pump 211 to keep the original working state; specifically, the control device 1 adjusts the working state of the delivery pump 211 through a water pump rotation speed regulator;
s450, if T30 is greater than T31+ delta T31, the control device 1 firstly controls the delivery pump 211 to load, and when the delivery pump 211 is loaded to be consistent with the preset maximum delivery pump loading value, the control device 1 controls the compressor 41 to unload;
and S460, if T30 is less than T31-delta T31, the control device 1 firstly controls the compressor 41 to be loaded, and when the compressor 41 is loaded to be consistent with the preset maximum loading value of the compressor, the control device 1 controls the delivery pump 211 to be unloaded so as to adjust the drying effect of the hot water coil 21 on the product.
According to the control method disclosed by the application, the control device 1 can adjust the working states of the compressor 41, the fan 34 and the delivery pump 211 according to the real-time data fed back by the first temperature sensor 51 and the third temperature sensor 55, so that the stability and the reliability of the heat pump drying unit during working are improved.
Further, referring to fig. 1 and 4, the heat pump drying unit further includes a fifth temperature sensor 57 electrically connected to the control device 1, where the fifth temperature sensor 57 is configured to detect an intake air temperature at a condensing end of the heat recovery rotating wheel; an auxiliary surface air cooler 36 is further arranged in the shell 3, the auxiliary surface air cooler 36 is arranged on the air outlet side of the evaporator 33, and a port of the auxiliary surface air cooler 36 is connected with an adjusting valve 361; the control method further comprises the steps of:
s510, the control device 1 obtains real-time air inlet temperature T50 fed back by the fifth temperature sensor 57 in real time, and compares the T50 with preset air inlet temperature T51 and fifth temperature accuracy delta T51 respectively; the user can set the sizes of T51 and Δ T51 in the control device 1 in advance through the display operation panel 6.
S520, the control device 1 adjusts the working states of the compressor 41 and the auxiliary surface cooler 36 according to the comparison result; specifically, in an embodiment, the step S520 specifically includes the steps of:
s521, if T51-delta T51 is not less than T50 is not less than T51+ delta T51, the control device 1 controls the regulating valve 361 to keep the original working state; in other embodiments, if the heat pump dryer group does not include the auxiliary surface cooler 36, the control device 1 controls the compressor 41 to maintain the original working state;
s522, if T50 is greater than T51+ delta T51, the control device 1 controls the regulating valve 361 to be loaded; if the heat pump drying unit does not comprise the auxiliary surface cooler 36, the control device 1 controls the compressor 41 to load;
s523, if T50 is less than or equal to T51-delta T51, the control device 1 controls the regulating valve 361 to unload; if the heat pump drying unit does not comprise the auxiliary surface cooler 36, the control device 1 controls the compressor 41 to unload; that is, the control device 1 adjusts the operation effect of the auxiliary surface cooler 36 according to the temperature of the air output by the fan 34, so as to adjust the heating effect of the air processing device on the air.
Further, referring to fig. 1 and 5, the heat pump device further includes an expansion valve 44, a gas-liquid separator 45, a first on-off valve 461, a second on-off valve 471, and an exhaust temperature sensor 56, and the air treatment device further includes an oil cooler 37; the compressor 41, the expansion valve 44 and the gas-liquid separator 45 are connected end to end; the compressor 41 is connected to the oil cooler 37 by a bypass valve 371, and the first on-off valve 461 is provided on a connection line between a low-pressure liquid jet port of the compressor 41 and the expansion valve 44; the second on-off valve 471 is disposed on a connection pipeline between the intermediate liquid injection port of the compressor 41 and the expansion valve 44; the control method further comprises the steps of:
s610, the control device 1 obtains an exhaust temperature value T0 fed back by the exhaust temperature sensor 56 in real time, and compares the value between T0 and a preset first action temperature T01 and a first reset temperature T02 respectively;
s620, the control device 1 adjusts the on-off state of the bypass valve 371 according to the comparison result; specifically, in an embodiment, the step S620 specifically includes the steps of:
s621, if T0 is not more than T01, the control device 1 controls the bypass valve 371 to be communicated;
s622, if T0 > T02, the control device 1 controls the bypass valve 371 to be opened.
The user or the worker can set the sizes of T01 and T02 in the control device 1 in advance through the display operation panel 6; the control device 1 adjusts the on-off state of the bypass valve 371 according to the comparison result of the T0 and the T01 and the T02, so that the high-temperature lubricating oil of the compressor 41 can be fully utilized to heat the air, the energy utilization rate is improved, the overhigh working temperature of the compressor 41 can be avoided, and the safety degree of the heat pump drying unit during working is improved.
Further, referring to fig. 1 and fig. 6, the control method further includes the steps of:
s710, the control device 1 obtains an exhaust temperature value fed back by the exhaust temperature sensor 56 in real time, and compares the value of T0 with a preset first action temperature T03, a preset first reset temperature T04, a preset second action temperature T05 and a preset second reset temperature T06 respectively;
s720, the control device 1 adjusts the on-off states of the first on-off valve 461 and the second on-off valve 471 according to the comparison result; specifically, in an embodiment, the step S320 specifically includes the steps of:
s721, if T0 is more than or equal to T03, the control device 1 controls the first on-off valve 461 to be switched on;
s722, if T0 is less than T04, the control device 1 controls the first on-off valve 461 to be opened;
s723, if T0 is larger than or equal to T05, the control device 1 controls the second cut-off valve 471 to be switched on;
and S724, if T0 is less than T06, the control device 1 controls the second cut-off valve 471 to be cut off.
The user or the worker can set the sizes of T03, T04, T05 and T06 in the control device 1 in advance through the display operation panel 6; the control device 1 adjusts the on-off states of the first on-off valve 461 and the second on-off valve 471 according to the comparison results of the T0 and the T03, the T04, the T05 and the T06, so that the problem of ice blockage of the evaporator 33 can be avoided, the working temperature of the compressor 41 can be prevented from being too high, and the safety degree of the heat pump dryer set during working is improved.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the protective scope of the present invention.

Claims (10)

1. A heat pump drying unit with a sterilization function is characterized by comprising a control device, a hot water coil, an air treatment device, a heat pump device and a sterilization mechanism; the hot water coil and the sterilization mechanism are respectively arranged in the drying chamber, the air treatment device is connected with the drying chamber through a pipeline, and the air treatment device is used for outputting high-temperature air to the drying chamber; the heat pump device comprises a compressor and a heat exchanger, the output end of the compressor is connected with the first port of the heat exchanger, the air treatment device is respectively connected with the second port of the heat exchanger and the input end of the compressor, the third port and the fourth port of the heat exchanger are respectively connected with the hot water coil pipe, and the heat exchanger is used for conveying a high-temperature heat source to the hot water coil pipe; the air treatment device, the heat pump device and the sterilization mechanism are respectively electrically connected with the control device.
2. The heat pump dryer group of claim 1, further comprising a first temperature sensor, a second temperature sensor, a first humidity sensor, a second humidity sensor, a third temperature sensor and a delivery pump electrically connected to the control device, respectively; the first temperature sensor is used for detecting the inlet air temperature of the air treatment device, and the first humidity sensor is used for detecting the inlet air humidity of the air treatment device; the second temperature sensor is used for detecting the air outlet temperature of the air treatment device, and the second humidity sensor is used for detecting the air outlet humidity of the air treatment unit; the third temperature sensor and the delivery pump are arranged on a first pipeline from the heat exchanger to the hot water coil pipe, and the third temperature sensor is used for detecting the temperature of the heat source output by the heat exchanger.
3. The heat pump dryer group of claim 2, wherein the air treatment device comprises a housing, an air filter, a heat recovery wheel evaporation end, an evaporator, a fan, a heat recovery wheel condensation end and an electric heater are sequentially arranged in the housing along an air inlet and outlet direction, and the fan, the electric heater and the heat recovery wheel are respectively electrically connected with the control device.
4. The heat pump dryer group of claim 3, wherein the heat pump device further comprises a dry filter, an expansion valve and a gas-liquid separator; the second port of the heat exchanger is connected with the input end of the dry filter, the output end of the dry filter is connected with the input end of the expansion valve, the output end of the expansion valve is connected with the input end of the evaporator, the output end of the evaporator is connected with the input end of the gas-liquid separator, and the output end of the gas-liquid separator is connected with the input end of the compressor.
5. The heat pump dryer group of claim 4, further comprising a regulating valve and a bypass valve; an auxiliary surface cooler and an oil cooler are also arranged in the shell; the auxiliary surface air cooler is arranged on the air outlet side of the evaporator, and the regulating valve is connected with an interface of the auxiliary surface air cooler; the oil cooler is arranged on the air outlet side of the electric heater, an inlet pipe of the oil cooler is connected with an oil way outlet of the compressor, and an outlet pipe of the oil cooler is connected with an oil way inlet of the compressor; one end of the bypass valve is connected with the inlet pipe, and the other end of the bypass valve is connected with the outlet pipe; the regulating valve and the bypass valve are respectively electrically connected with the control device.
6. The heat pump dryer group of claim 4, wherein the heat pump device further comprises a first on-off valve, a first throttling device, a second on-off valve and a second throttling device; one end of the first on-off valve is connected with the low-pressure liquid spraying port of the compressor through the first throttling device, and the other end of the first on-off valve is respectively connected with the output end of the drying filter and the input end of the expansion valve; one end of the second on-off valve is connected with the middle liquid spraying port of the compressor through the second throttling device, and the other end of the second on-off valve is connected with the output end of the drying filter and the input end of the expansion valve respectively.
7. The heat pump drying unit according to claim 2, wherein the sterilization mechanism includes a sterilization lamp and an electrostatic sterilization device electrically connected to the control device, respectively, the sterilization lamp is disposed on the top of the drying chamber, and the electrostatic sterilization device is disposed on the inner walls of the drying chamber on the left and right sides.
8. A control method of a heat pump drying unit with a sterilization function is characterized in that the control method is used for realizing the work control of the heat pump drying unit according to any one of claims 3-7; the control method specifically comprises the following steps:
the control device obtains a real-time inlet air temperature T10 fed back by the first temperature sensor and a real-time outlet water temperature T30 fed back by the third temperature sensor;
when the real-time air inlet temperature T10 is greater than or equal to the preset preheating starting temperature T11 and less than the preset preheating stopping temperature T12, the control device starts the fan firstly and then starts the electric heater;
when the real-time air inlet temperature T10 is greater than or equal to the preset preheating stop temperature T12, the control device controls the electric heater to stop working and controls the sterilization mechanism to start working; the control device respectively compares the T10 with the preset inlet air temperature T13 and the first temperature accuracy delta T13 and compares the T30 with the preset outlet water temperature T31 and the outlet water accuracy delta T31;
and the control device adjusts the working states of the compressor, the fan and the heat recovery rotating wheel according to the comparison result.
9. The control method according to claim 8, wherein the heat pump dryer group further comprises a fifth temperature sensor electrically connected to the control device, the fifth temperature sensor being configured to detect an intake air temperature at a condensing end of the heat recovery wheel; an auxiliary surface air cooler is further arranged in the shell and arranged on the air outlet side of the evaporator, and an interface of the auxiliary surface air cooler is connected with the regulating valve; the control method further comprises the steps of:
the control device acquires real-time air inlet temperature T50 fed back by the fifth temperature sensor in real time and compares the T50 with preset air inlet temperature T51 and fifth temperature precision delta T51 respectively;
and the control device adjusts the working states of the compressor and the auxiliary surface cooler according to the comparison result.
10. The control method according to claim 8, wherein the heat pump apparatus further includes an expansion valve, a gas-liquid separator, a first on-off valve, a second on-off valve, and an exhaust gas temperature sensor, and the air processing apparatus further includes an oil cooler; the compressor, the expansion valve and the gas-liquid separator are connected end to end; the compressor is connected with the oil cooler through a bypass valve, and the first on-off valve is arranged on a connecting pipeline between a low-pressure liquid spraying opening of the compressor and the expansion valve; the second on-off valve is arranged on a connecting pipeline between a middle liquid spraying port of the compressor and the expansion valve;
the control method further comprises the steps of:
the control device acquires an exhaust temperature value T0 fed back by the exhaust temperature sensor in real time, and compares the value between T0 and a preset first action temperature T01 and a first reset temperature T02 respectively;
the control device adjusts the on-off state of the bypass valve according to the comparison result.
CN202110824631.5A 2021-07-21 2021-07-21 Heat pump drying unit with sterilization function and control method thereof Active CN113819750B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2424431Y (en) * 2000-05-25 2001-03-21 华南理工大学 Adsorbing rotary drier
KR20060036285A (en) * 2004-10-25 2006-04-28 황규횡 A cooling and heating dryer
CN201532094U (en) * 2009-11-20 2010-07-21 南京五洲制冷集团有限公司 Heat pump drying machine for resource regeneration
CN205119754U (en) * 2015-10-29 2016-03-30 广东海洋大学 Solar energy adsorbs joint heat pump drying device
CN107014172A (en) * 2017-05-27 2017-08-04 中原工学院 A kind of three pressure air-cooled heat pump drying systems with recuperation of heat
CN110360833A (en) * 2019-07-31 2019-10-22 苏州海派特热能设备有限公司 A kind of varying duty dehumidifying heat pump drying system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2424431Y (en) * 2000-05-25 2001-03-21 华南理工大学 Adsorbing rotary drier
KR20060036285A (en) * 2004-10-25 2006-04-28 황규횡 A cooling and heating dryer
CN201532094U (en) * 2009-11-20 2010-07-21 南京五洲制冷集团有限公司 Heat pump drying machine for resource regeneration
CN205119754U (en) * 2015-10-29 2016-03-30 广东海洋大学 Solar energy adsorbs joint heat pump drying device
CN107014172A (en) * 2017-05-27 2017-08-04 中原工学院 A kind of three pressure air-cooled heat pump drying systems with recuperation of heat
CN110360833A (en) * 2019-07-31 2019-10-22 苏州海派特热能设备有限公司 A kind of varying duty dehumidifying heat pump drying system

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