CN113865208B - Heat pump rotating wheel coupling device for frostless refrigeration house and operation method - Google Patents
Heat pump rotating wheel coupling device for frostless refrigeration house and operation method Download PDFInfo
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- CN113865208B CN113865208B CN202111088017.3A CN202111088017A CN113865208B CN 113865208 B CN113865208 B CN 113865208B CN 202111088017 A CN202111088017 A CN 202111088017A CN 113865208 B CN113865208 B CN 113865208B
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- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/042—Air treating means within refrigerated spaces
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- 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
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- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D13/00—Stationary devices, e.g. cold-rooms
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- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
- F25D2317/04—Treating air flowing to refrigeration compartments
- F25D2317/041—Treating air flowing to refrigeration compartments by purification
- F25D2317/0411—Treating air flowing to refrigeration compartments by purification by dehumidification
Abstract
A heat pump rotating wheel coupling device for a frost-free cold storage comprises a heat pump rotating wheel dehumidification and refrigeration system and a control system which are mutually connected and matched, fresh air, exhaust air and regenerated air circulation modes of a device are adjusted according to outdoor temperature, cold storage temperature and critical frosting temperature of the dehumidification rotating wheel, and condensation heat generated during refrigeration of the cold storage is fully utilized for dehumidification rotating wheel regeneration and fresh air heat exchange, so that the frost-free operation of an evaporator for refrigeration of the cold storage is met with relatively low system energy consumption. The invention also discloses an operation method of the system. In the invention, the system ensures the frostless operation of the refrigeration evaporator of the refrigeration house through dehumidification, and fully utilizes the waste heat of the system according to different outdoor temperatures and refrigeration house temperature conditions, thereby achieving the purpose of reducing the operation energy consumption of the refrigeration house. On the other hand, the system operation mode is judged according to the temperature of the refrigeration house and the outdoor temperature, and compared with the control of the temperature of a fresh air and return air mixing point, the system operation mode has the advantages of being faster and more stable, and the problem of frequent adjustment between the operation modes is avoided.
Description
Technical Field
The invention belongs to the technical field of refrigeration of a refrigeration house, and relates to a heat pump rotating wheel coupling device for a frost-free refrigeration house and an operation method thereof.
Background
In recent years, the refrigeration industry in China is rapidly developed, and the energy consumption level of refrigeration and transportation far exceeds the average level in foreign countries. The rapid development of the cold-chain logistics industry does not need the equipment upgrading of the cold storage, the capacity of the cold storage is increased rapidly, the energy consumption is increased, the energy consumption of the cold storage in China accounts for more than 70% of the energy consumption of the whole cold-chain logistics industry, and the electricity consumption accounts for 45% of the operation cost of the cold storage. The energy consumption of the refrigeration industry, especially the energy consumption stored in a refrigeration house is extremely urgent.
In actual operation, a large part of the energy consumption loss of the refrigeration house is caused by the reduction of heat exchange efficiency caused by the frosting of the cold coil pipe. Studies have shown that when a refrigeration system is operating "frosted", its COP decreases by 20-30%. The temperature in the cold storage is low, the minimum temperature can reach minus 45 ℃, and the water vapor in the air in the cold storage which is cooled by the cold coil pipe is generally in a saturated state and can be separated out on the surface of the calandria and condensed into frost. When the evaporation temperature is reduced to a certain degree (the specific value is related to the partial pressure of water vapor in local air), the water vapor in the air is also likely to be directly sublimated into frost. The frosting of the coil pipe can increase the heat transfer resistance of the heat exchanger on one hand, and can block an air flow channel in the heat exchanger on the other hand, so that the air flow resistance is increased. The two aspects finally cause the heat exchange effect of the evaporator to be reduced, the energy consumption of the fan to be increased, and further cause the refrigeration performance of the refrigeration house refrigerating unit to be reduced and the energy consumption of refrigeration operation to be increased. When the frosting is serious, even the shutdown of the refrigeration house can be caused, and serious economic loss is brought.
The common refrigeration house dehumidification methods at present mainly comprise active defrosting, solution dehumidification and rotary wheel dehumidification. The active defrosting technology mainly comprises heat-exchanging defrosting of a four-way valve and auxiliary heating defrosting, and the two defrosting modes both need to suspend refrigeration of a refrigerator to defrost. The solution dehumidification technology needs to be provided with a large number of accessory equipment (solution pumps, spray towers and the like), the system is complex, the application in the cold storage with smaller size is limited, the requirements on the design and the operation of the system are higher, otherwise, the problem of air carrying liquid is easily generated, and the pollution in the cold storage is caused. The size of the rotary wheel dehumidification system is small, but high-temperature air needs to be heated for regeneration, and the energy consumption of the system is easily increased by directly adopting an electric heating mode; meanwhile, the temperature of the refrigeration house is low, and the surface of the dehumidifying rotating wheel is frosted if the refrigerating house directly enters the rotating wheel, so that the dehumidifying efficiency is reduced and even the dehumidification is difficult due to the blockage of the adsorption micropores.
Disclosure of Invention
The invention aims to provide a heat pump rotating wheel coupling device for a frost-free cold storage and an operation method thereof.
In order to achieve the purpose, the solution of the invention is as follows:
a heat pump rotating wheel coupling device for a frost-free refrigeration house comprises a heat pump rotating wheel dehumidification refrigeration system and a control system which are mutually connected and matched, fresh air, exhaust air and regeneration air circulation modes of a device are adjusted according to outdoor temperature, refrigeration house temperature and the critical frosting temperature of the dehumidification rotating wheel, and condensation heat generated during refrigeration of the refrigeration house is fully utilized for dehumidification rotating wheel regeneration and fresh air heat exchange, so that the frost-free operation of an evaporator for refrigeration of the refrigeration house is met with relatively low system energy consumption.
Further, the heat pump rotating wheel coupling device for the frostless refrigeration house comprises a heat pump rotating wheel dehumidification and refrigeration system and a control system which are mutually connected and matched; the heat pump rotating wheel dehumidification refrigeration system comprises a total heat exchanger, a preheating condenser, a dehumidification rotating wheel, an evaporator, an air supply fan, a regeneration condenser, an auxiliary heater, an air exhaust fan, a compressor, a preheating expansion valve and a regeneration expansion valve which are mutually connected and matched; the control system comprises a controller, and a first electric air valve, a second electric air valve, a third electric air valve, a fourth electric air valve, a fifth electric air valve, a sixth electric air valve, a seventh electric air valve, a first temperature sensor, a second temperature sensor, a third temperature sensor and a dew point temperature sensor which are electrically connected with the controller.
The total heat exchanger is arranged between the fresh air passage and the exhaust passage and is used for heat exchange between fresh air and exhaust air; the preheating condenser, the evaporator and the air supply fan are positioned in an air supply passage in the device, the preheating condenser is positioned in front of the dehumidification rotating wheel dehumidification area, and the evaporator and the air supply fan are positioned in front of the dehumidification rotating wheel dehumidification area; the regeneration fan, the regeneration condenser and the auxiliary heater are positioned in a regeneration air passage in the device and are all positioned in front of the regeneration area of the dehumidification rotating wheel; the dehumidification area of the dehumidification rotating wheel is positioned in an air supply passage in the device, and the regeneration area of the dehumidification rotating wheel is positioned in a regeneration air passage in the device; the compressor, the preheating expansion valve and the regeneration expansion valve are arranged outside the device, and the compressor, the preheating expansion valve and the regeneration expansion valve form a heat pump together with the preheating condenser, the evaporator and the regeneration condenser.
Further, the heat pump runner coupling device for the frost-free refrigerator further comprises a first air outlet, a second air outlet, a third air outlet, a fourth air outlet, a fifth air outlet, a sixth air outlet, a seventh air outlet and an eighth air outlet, wherein the first air outlet is connected with the outdoor air outlet and the sixth air outlet, the second air outlet is connected with the outdoor air outlet, the third air outlet is connected with the return air inlet in the refrigerator, the fourth air outlet is connected with the air supply inlet in the refrigerator, the fifth air outlet is connected with the outdoor fresh air inlet, the seventh air outlet is connected with the outdoor air outlet, and the eighth air outlet is connected with the exhaust air inlet in the refrigerator.
Specifically, the first air outlet is connected with an air pipe outside the device, the air pipe is divided into a main pipe and a branch pipe, the main pipe is connected to the outside (fresh air inlet), and the branch pipe is connected to the sixth air outlet. When the device is in a fresh air bypass working mode, outdoor air passes through the main pipe from the fresh air inlet to the first air outlet, and the sixth air outlet is disconnected from the branch pipe and the first air outlet by closing the valve 12-6; when the fresh air-exhaust total heat exchange mode is adopted, the exhaust air is exhausted to the outside from the first air outlet receiving port through the main pipe, and the sixth air outlet receiving port is disconnected from the branch pipe and the first air outlet receiving port by closing the valve 12-6; when the fresh air-regenerative exhaust air total heat exchange working mode is adopted, regenerative exhaust air enters the sixth air outlet from the first air outlet through the branch pipe, and the outdoor fresh air inlet is closed.
The first electric air valve is arranged on a full heat exchanger bypass pipeline between the first air receiving outlet and the preheating condenser; the second electric air valve is arranged on the pipeline between the first air receiving outlet and the air exhaust outlet of the total heat exchanger; the third electric air valve is arranged on a pipeline between the second air receiving outlet and the fresh air inlet of the total heat exchanger; the fourth electric air valve is arranged on a pipeline between the second air receiving outlet and the exhaust fan; a fifth electric air valve is arranged on a connection outlet pipeline between the fifth air outlet and the regeneration fan; a sixth electric air valve is arranged on a connection outlet pipeline between the sixth connection outlet and the regeneration fan; and the seventh electric air valve is arranged on a main passage between the dehumidification rotary wheel regeneration area and an air exhaust air inlet of the total heat exchanger.
The third air outlet is provided with the first temperature sensor; the fifth air outlet is provided with the second temperature sensor; the third temperature sensor is arranged on a main passage at the outlet of the dehumidification rotating wheel regeneration area; the dew point temperature sensor is arranged between the dehumidification area of the dehumidification rotating wheel and the evaporator.
The first output end of the compressor is communicated with the input ends of the preheating condenser, the preheating expansion valve, the evaporator and the compressor in sequence through refrigerant pipes to form a first loop.
And the second output end of the compressor is communicated with the regenerative condenser, the regenerative expansion valve, the evaporator and the input end of the compressor in sequence through refrigerant pipes to form a second loop.
Optionally, the control system further includes a preheating expansion valve and a regenerating expansion valve electrically connected to the controller, respectively.
Optionally, the controller is further electrically connected to a switch controller of the auxiliary heater.
An operation method of a heat pump rotating wheel coupling device for a frost-free refrigerator comprises the following steps:
(1) Fresh air bypass working mode
The second electric air valve, the third electric air valve, the sixth electric air valve and the seventh electric air valve are closed, and the first electric air valve, the fourth electric air valve and the fifth electric air valve are opened; closing the preheating expansion valve and opening the regeneration expansion valve; outdoor fresh air enters the device through a first air inlet, indoor exhaust air enters the device through an eighth air inlet, indoor return air enters the device through a third air inlet, and outdoor air enters the device through a fifth air inlet; fresh air is mixed with indoor return air through a bypass pipeline, and is dehumidified and cooled by a preheating condenser, a dehumidification rotating wheel dehumidification area and an evaporator in sequence and then is supplied to a refrigeration house through an air supply fan and a fourth air outlet; the indoor exhaust air is exhausted to the outside through a bypass pipeline and a second air outlet; after entering the device, the outdoor air passes through a regeneration fan, a regeneration condenser, an auxiliary heater and a dehumidification rotating wheel regeneration area in sequence and is exhausted to the outside through a seventh air outlet;
(2) Fresh air-exhaust total heat exchange working mode
The first electric air valve, the fourth electric air valve, the sixth electric air valve and the seventh electric air valve are closed, and the second electric air valve, the third electric air valve and the fifth electric air valve are opened; closing the preheating expansion valve and opening the regeneration expansion valve; outdoor fresh air enters the device through the second air inlet, indoor exhaust air enters the device through the eighth air inlet, indoor return air enters the device through the third air inlet, and outdoor air enters the device through the fifth air inlet; fresh air enters the total heat exchanger through a fresh air inlet of the total heat exchanger, exchanges heat with indoor exhaust air, flows out of the total heat exchanger through a fresh air outlet of the total heat exchanger, is mixed with indoor return air, is dehumidified and cooled sequentially through a preheating condenser, a dehumidifying rotating wheel dehumidifying area and an evaporator, and is supplied to a refrigeration house through an air supply fan and a fourth air outlet; indoor exhaust air enters the total heat exchanger through an exhaust air inlet of the total heat exchanger, exchanges heat with outdoor fresh air, flows out through an exhaust air outlet of the total heat exchanger, and is exhausted to the outside through a first air outlet; after entering the device, the outdoor air passes through a regeneration fan, a regeneration condenser, an auxiliary heater and a dehumidification rotating wheel regeneration area in sequence and is exhausted to the outside through a seventh air outlet;
(3) Fresh air-regeneration exhaust total heat exchange working mode
The first electric air valve is closed, and the second electric air valve, the third electric air valve, the fourth electric air valve, the fifth electric air valve, the sixth electric air valve and the seventh electric air valve are opened; opening the preheating expansion valve and opening the regeneration expansion valve; outdoor fresh air enters the device through a second air inlet, indoor exhaust air enters the device through an eighth air inlet, indoor return air enters the device through a third air inlet, and outdoor air enters the device through a fifth air inlet; fresh air enters the total heat exchanger through a fresh air inlet of the total heat exchanger, exchanges heat with part of the dehumidification runner regenerated air, flows out of the total heat exchanger through a fresh air outlet of the total heat exchanger, is mixed with indoor return air, is dehumidified and cooled sequentially through a preheating condenser, a dehumidification runner dehumidification area and an evaporator, and is supplied to a refrigeration house through an air supply fan and a fourth air outlet; the indoor exhaust air is exhausted to the outside through a bypass pipeline and a second air outlet; outdoor air passes through the regeneration fan in proper order after inserting wind gap admission gear by the fifth, the regeneration condenser, divide into two the tunnel behind auxiliary heater and the dehumidification runner regeneration zone, it enters total heat exchanger and carries out the heat exchange with the new trend through total heat exchanger air intake of airing exhaust all the way, another way connects the air outlet through the seventh and discharges to outdoor, and preheat the expansion valve aperture and adjust according to the new trend ratio of presetting among the control system, total heat exchanger sensible heat exchange efficiency and the critical frosting temperature of dehumidification runner, and by real-time supervision's outdoor temperature, the air temperature after the heat transfer that dehumidification runner regeneration zone export air temperature calculated obtains mixes the wind adjusts:
T m ＝T R (1-F r +ηF r )+T W (1-η)F r
in the formula: t is m The temperature of the air after heat exchange and air mixing is lower than the temperature;
F r the fresh air ratio is input into the control system in advance;
T w -outdoor temperature, ° c;
T R -the temperature of the air at the outlet of the regeneration zone of the desiccant wheel is at DEG C;
eta, the heat exchange efficiency of the total heat exchanger, is input into the control system in advance.
An operation method of a heat pump rotating wheel coupling device for a frost-free cold storage comprises the following steps:
(1) The working process that the temperature of the refrigeration house is required to be higher than the critical frosting temperature of the dehumidification rotating wheel is as follows:
the method comprises the following steps of acquiring a refrigeration house temperature value acquired by a first temperature sensor and an outdoor air temperature value acquired by a second temperature sensor in real time, and comparing the two temperature values in a control system:
a. when the temperature of the cold storage is lower than the outdoor air temperature: the operation is carried out in a fresh air-exhaust full heat exchange working mode;
b. when the freezer temperature equals the outdoor air temperature: operating in a fresh air bypass working mode;
c. when the temperature of the refrigeration house is higher than the temperature of outdoor air: judging according to the detected outdoor air temperature value and the refrigeration house temperature value:
T＝F r T w +(1-F r )T N
when T is higher than the critical frosting temperature of the dehumidifying wheel: operating in a fresh air bypass working mode;
when T is less than or equal to the critical frosting temperature of the dehumidification rotating wheel: the operation is carried out in a fresh air-regenerative exhaust air total heat exchange working mode.
(2) The working process that the temperature of the refrigeration house is required to be equal to or lower than the critical frosting temperature of the dehumidifying rotating wheel is as follows:
the method comprises the following steps of acquiring a refrigeration house temperature value acquired by a first temperature sensor and an outdoor air temperature value acquired by a second temperature sensor in real time, and comparing the two temperature values in a control system:
a. when the temperature of the cold storage is higher than or equal to the temperature of outdoor air: the operation is carried out in a fresh air-regenerative exhaust air total heat exchange working mode;
b. when the temperature of the cold storage is lower than the outdoor air temperature: judging according to the detected outdoor air temperature value and the refrigeration house temperature value:
T＝F r T w +(1-F r )T N
when T is higher than the critical frosting temperature of the dehumidifying wheel: operating in a fresh air bypass working mode;
when T is less than or equal to the critical frosting temperature of the dehumidification rotating wheel: the operation is carried out in a fresh air-regenerative exhaust full heat exchange working mode;
on the basis, the heating power of the auxiliary heater is adjusted in real time according to a dew point temperature sensor: when the dew point temperature is higher than the preset critical frosting temperature of the evaporator, the power of the auxiliary heater is increased; when the dew point temperature is lower than the preset critical frosting temperature of the evaporator, the power of the auxiliary heater is reduced;
the frequency of the compressor is adjusted in real time according to a first temperature sensor: when the temperature detected by the first temperature sensor is higher than the set temperature of the refrigeration house, the frequency of the compressor is increased; when the first temperature sensor detects that the temperature is lower than the preset temperature of the refrigeration house, the frequency of the compressor is reduced.
Due to the adoption of the scheme, the invention has the following beneficial effects:
1. the heat pump rotating wheel coupling device for the frostless refrigeration house adjusts the fresh air, exhaust and regeneration air circulation modes of the device according to the outdoor temperature, the refrigeration house temperature and the critical frosting temperature of the dehumidifying rotating wheel, and fully utilizes the condensation heat generated during the refrigeration of the refrigeration house for the dehumidification rotating wheel regeneration and the fresh air heat exchange, thereby ensuring that the frostless operation of the evaporator for the refrigeration of the refrigeration house is met with the lowest system energy consumption.
2. The operation method provided by the invention is characterized in that according to the outdoor temperature, the temperature of the refrigeration house and the temperature of the regenerated air outlet which are monitored in real time, the fresh air bypass working mode, the fresh air-exhaust total heat exchange and the fresh air-regeneration exhaust total heat exchange working mode are adjusted through the formula, compared with the conventional control system which is commonly used for adjusting according to the temperature of a control point, the operation method has the advantages of rapidness and accuracy, and the problem of frequent switching among multiple modes can be avoided.
Drawings
Fig. 1 is an overall schematic view of a heat pump rotary wheel coupling device for a frost-free refrigerator according to an embodiment of the present invention.
Reference numerals:
the system comprises a total heat exchanger 1, a preheating condenser 2, a dehumidifying rotating wheel 3, an evaporator 4, an air supply fan 5, a regenerating fan 6, a regenerating condenser 7, an auxiliary heater 8, an exhaust fan 9, a compressor 10, a preheating expansion valve 11-1, a regenerating expansion valve 11-2, a first air outlet 14-1, a second air outlet 14-2, a third air outlet 14-3, a fourth air outlet 14-4, a fifth air outlet 14-5, a sixth air outlet 14-6, a seventh air outlet 14-7 and an eighth air outlet 14-8; the control system includes: the device comprises a controller, and a first electric air valve 12-1, a second electric air valve 12-2, a third electric air valve 12-3, a fourth electric air valve 12-4, a fifth electric air valve 12-5, a sixth electric air valve 12-6, a seventh electric air valve 12-7, a first temperature sensor 13-1, a second temperature sensor 13-2, a third temperature sensor 13-3 and a dew point temperature sensor 13-4 which are all electrically connected with the controller.
Detailed Description
The invention will be further described with reference to examples of embodiments shown in the drawings.
The invention provides a heat pump rotating wheel coupling device for a frost-free refrigerator and an operation method thereof, wherein the heat pump rotating wheel coupling device for the frost-free refrigerator comprises a heat pump rotating wheel coupling device and a control system; wherein, the heat pump runner coupling device includes: the system comprises a total heat exchanger 1, a preheating condenser 2, a dehumidifying rotating wheel 3, an evaporator 4, an air supply fan 5, a regenerating fan 6, a regenerating condenser 7, an auxiliary heater 8, an exhaust fan 9, a compressor 10, a preheating expansion valve 11-1, a regenerating expansion valve 11-2, a first air outlet 14-1, a second air outlet 14-2, a third air outlet 14-3, a fourth air outlet 14-4, a fifth air outlet 14-5, a sixth air outlet 14-6, a seventh air outlet 14-7 and an eighth air outlet 14-8; the control system includes: the device comprises a controller, and a first electric air valve 12-1, a second electric air valve 12-2, a third electric air valve 12-3, a fourth electric air valve 12-4, a fifth electric air valve 12-5, a sixth electric air valve 12-6, a seventh electric air valve 12-7, a first temperature sensor 13-1, a second temperature sensor 13-2, a third temperature sensor 13-3 and a dew point temperature sensor 13-4 which are electrically connected with the controller;
the first air receiving and outlet port 14-1 is sequentially connected with the preheating condenser 2, the dehumidification area of the dehumidification rotating wheel 3, the evaporator 4 and the air supply fan 5 through a main passage; the first air outlet 14-1 is also connected with the air outlet of the total heat exchanger 1, the air inlet of the total heat exchanger 1, the regeneration area of the dehumidification rotating wheel 3, the auxiliary heater 8, the regeneration condenser 7, the regeneration fan 6 and the fifth air outlet 14-5 in turn through branch passages; the first air receiving outlet 14-1 is also connected with an air exhaust outlet of the total heat exchanger 1, an air exhaust inlet of the total heat exchanger 1, an air exhaust fan 9 and an eighth air receiving outlet 14-8 in sequence through a branch passage;
the first air receiving and outlet port 14-1 is connected to the outdoor air and the sixth air receiving and outlet port 14-6 (A-A') through an air pipe.
The second air receiving and outlet port 14-2 is sequentially connected with an exhaust fan 9 and an eighth air receiving and outlet port 14-8 through a main passage; the second air receiving and outlet 14-2 is also connected with a fresh air inlet of the total heat exchanger 1, a fresh air outlet of the total heat exchanger 1, the preheating condenser 2, a dehumidification area of the dehumidification rotating wheel 3, the evaporator 4 and the air supply fan 5 in sequence through branch passages;
the third air inlet and outlet 14-3 is sequentially connected with the preheating condenser 2, the dehumidification area of the dehumidification rotating wheel 3, the evaporator 4 and the air supply fan 5 through a main passage;
and the sixth air outlet 14-6 is sequentially connected with a regenerative fan 6, a regenerative condenser 7, an auxiliary heater 8, a regeneration area of the dehumidification rotating wheel 3, an air exhaust inlet of the total heat exchanger 1, an air exhaust outlet of the total heat exchanger 1 and the first air outlet 14-1 through a main passage.
The seventh air outlet 14-7 is directly connected with the regeneration area of the dehumidification rotating wheel 3 through a branch passage;
a first output end of the compressor 10 is sequentially communicated with the preheating condenser, the preheating expansion valve 11-1, the evaporator 4 and an input end of the compressor 10 through refrigerant pipes to form a first refrigerant loop;
a second output end of the compressor 10 is sequentially communicated with the regenerative condenser 7, the regenerative expansion valve 11-2, the evaporator 4 and an input end of the compressor 10 through refrigerant pipes to form a second refrigerant loop;
the first electric air valve 12-1 is arranged on a bypass pipeline of the total heat exchanger 1 between the first air receiving and outlet port 14-1 and the preheating condenser 2; the second electric air valve 12-2 is arranged on a pipeline between the first air receiving outlet 14-1 and the air exhaust outlet of the total heat exchanger 1; a third electric air valve 12-3 is arranged on a pipeline between the second air receiving outlet 14-2 and the fresh air inlet of the total heat exchanger 1; the fourth electric air valve 12-4 is arranged on a pipeline between the second air receiving and outlet 14-2 and the exhaust fan 9; a fifth electric air valve 12-5 is arranged on a connecting and discharging pipeline between the fifth connecting and discharging air inlet 14-5 and the regeneration fan 6; a sixth electric air valve 12-6 is arranged on a connection and outlet pipeline between the sixth air inlet 14-6 and the regeneration fan 6; the seventh electric air valve 12-7 is arranged on the main passage between the regeneration area of the dehumidification turning wheel 3 and the air exhaust inlet of the total heat exchanger 1;
the first temperature sensor 13-1 is arranged at the third air inlet 14-3; the fifth air outlet 14-5 is provided with the second temperature sensor 13-2; the third temperature sensor 13-3 is arranged on the main passage at the outlet of the regeneration area of the dehumidification rotating wheel 3; the dew point temperature sensor 13-4 is arranged between the dehumidification area of the dehumidification rotating wheel 3 and the evaporator 4;
optionally, the controller is further electrically connected to the pressure regulator and the switch of the auxiliary heater 8, the compressor frequency converter, the preheating expansion valve 11-1 controller, and the regeneration expansion valve 11-2 controller.
It should be emphasized that the heat pump rotary wheel coupling device for the frost-free cold storage has the following working modes:
(4) Fresh air bypass working mode:
the second electric air valve 12-2, the third electric air valve 12-3, the sixth electric air valve 12-6 and the seventh electric air valve 12-7 are closed, and the first electric air valve 12-1, the fourth electric air valve 12-4 and the fifth electric air valve 12-5 are opened; the preheating expansion valve 11-1 is closed, and the regeneration expansion valve 11-2 is opened; outdoor fresh air enters the device through the first air inlet and outlet, indoor exhaust air enters the device through the eighth air inlet and outlet 14-8, indoor return air enters the device through the third air inlet and outlet 14-3, and outdoor air enters the device through the fifth air inlet; fresh air is mixed with indoor return air through a bypass pipeline, and is dehumidified and cooled by a preheating condenser 2, a dehumidification rotating wheel 3 and an evaporator 4 in sequence and then is supplied to a refrigeration house through an air supply fan 5 and a fourth air outlet 14-4; the indoor exhaust air is exhausted to the outside through a bypass pipeline and a second air outlet 14-2; after entering the device, the outdoor air passes through a regeneration fan 6, a regeneration condenser 7, an auxiliary heater 8 and a regeneration area of the dehumidification rotating wheel 3 in sequence and is discharged to the outside through a seventh air outlet 14-7;
(5) Fresh air-exhaust total heat exchange working mode:
the first electric air valve 12-1, the fourth electric air valve 12-4, the sixth electric air valve 12-6 and the seventh electric air valve 12-7 are closed, and the second electric air valve 12-2, the third electric air valve 12-3 and the fifth electric air valve 12-5 are opened; the preheating expansion valve 11-1 is closed, and the regeneration expansion valve 11-2 is opened; outdoor fresh air enters the device through the second air inlet 14-2, indoor exhaust air enters the device through the eighth air inlet 14-8, indoor return air enters the device through the third air inlet 14-3, and outdoor air enters the device through the fifth air inlet; fresh air enters the total heat exchanger 1 through a fresh air inlet of the total heat exchanger 1, exchanges heat with indoor exhaust air, flows out of the total heat exchanger 1 through a fresh air outlet of the total heat exchanger 1, is mixed with indoor return air, is dehumidified and cooled sequentially through a preheating condenser 2, a dehumidification rotating wheel 3 dehumidification area and an evaporator 4, and is supplied to a refrigeration house through an air supply fan 5 and a fourth air receiving outlet 14-4; indoor exhaust air enters the total heat exchanger 1 through an exhaust air inlet of the total heat exchanger 1, exchanges heat with outdoor fresh air, flows out through an exhaust air outlet of the total heat exchanger 1, and is exhausted to the outside through a first air receiving outlet; after entering the device, the outdoor air passes through a regeneration fan 6, a regeneration condenser 7, an auxiliary heater 8 and a regeneration area of the dehumidification rotating wheel 3 in sequence and is discharged to the outside through a seventh air outlet 14-7;
(6) Fresh air-regeneration air exhaust total heat exchange working mode:
the first electric air valve 12-1 is closed, and the second electric air valve 12-2, the third electric air valve 12-3, the fourth electric air valve 12-4, the fifth electric air valve 12-5, the sixth electric air valve 12-6 and the seventh electric air valve 12-7 are opened; opening the preheating expansion valve 11-1 and opening the regeneration expansion valve; outdoor fresh air enters the device through the second air inlet 14-2, indoor exhaust air enters the device through the eighth air inlet 14-8, indoor return air enters the device through the third air inlet 14-3, and outdoor air enters the device through the fifth air inlet; fresh air enters the total heat exchanger 1 through a fresh air inlet of the total heat exchanger 1, exchanges heat with regenerated air of a part of dehumidifying rotating wheels 3, flows out of the total heat exchanger 1 through a fresh air outlet of the total heat exchanger 1, is mixed with indoor return air, is dehumidified and cooled sequentially through a preheating condenser 2, a dehumidifying rotating wheel 3 dehumidifying area and an evaporator 4, and is supplied to a refrigeration house through an air supply fan 5 and a fourth air receiving outlet 14-4; indoor exhaust air is exhausted to the outside through a bypass pipeline and a second air outlet 14-2; outdoor air enters the device from a fifth air inlet and then sequentially passes through a regeneration fan 6, a regeneration condenser 7, an auxiliary heater 8 and a dehumidification rotating wheel 3 regeneration area to be divided into two paths, one path of air enters the total heat exchanger 1 through an air exhaust inlet of the total heat exchanger 1 to exchange heat with fresh air, the other path of air is discharged to the outside through a seventh air outlet 14-7, and the opening degree of a preheating expansion valve 11-1 is adjusted according to a fresh air ratio preset in a control system, sensible heat exchange efficiency of the total heat exchanger 1 and critical frosting temperature of the dehumidification rotating wheel 3, and the air temperature after heat exchange air mixing obtained by calculating the outdoor temperature monitored in real time and the air temperature at the outlet of the dehumidification rotating wheel 3 regeneration area:
T m ＝T R (1-F r +ηF r )+T W (1-η)F r
in the formula: t is a unit of m The air temperature after heat exchange and air mixing is at the temperature of DEG C;
F r the fresh air ratio is input into the control system in advance;
T w -outdoor temperature, ° c;
T R the temperature of the air at the outlet of the regeneration area of the dehumidification rotating wheel is lower than the temperature of the air at the outlet of the regeneration area of the dehumidification rotating wheel;
eta, the heat exchange efficiency of the total heat exchanger, which is input into the control system in advance;
the running method of the heat pump rotating wheel coupling device for the frost-free cold storage comprises the following steps: when the system is started, the controller acquires the temperature T of the refrigeration house of the first temperature sensor 13-1 in real time N And the outdoor air temperature T of the second temperature sensor 13-2 w And according to the pre-input fresh air ratio F r Calculating the mixed air temperature T = F r T W +(1-F r )T N . The system firstly judges the relation between the temperature of the refrigeration house and the critical frosting temperature of the dehumidifying rotating wheel 3, and when the temperature of the refrigeration house is judged to be higher than the critical frosting temperature of the dehumidifying rotating wheel 3, the relation between the temperature of the refrigeration house and the temperature of outdoor air is continuously judged: if the temperature of the refrigeration house is lower than the outdoor air temperature, the system is adjusted to the working mode of fresh air-exhaust total heat exchange to operate; if the temperature of the refrigeration house is equal to the temperature of outdoor air: operating in a fresh air bypass working mode; if the temperature of the refrigeration house is higher than the temperature of the outdoor air, the calculated mixed air temperature is continuously judged, and the relation between the mixed air temperature and the critical frosting temperature of the dehumidifying rotating wheel 3 is judged: when the T is higher than the critical frosting temperature of the dehumidifying rotating wheel 3, the system is adjusted to a fresh air bypass working mode; when T is less than or equal to the critical frosting temperature of the dehumidifying rotary wheel 3, the system is adjusted to a fresh air-regeneration exhaust air total heat exchange working mode. When the temperature of the refrigeration house is judged to be higher than the critical frosting temperature of the dehumidifying rotating wheel 3, the frosting risk of the dehumidifying rotating wheel 3 is shown, and the relation between the temperature of the refrigeration house and the temperature of outdoor air is continuously judged: if the temperature of the refrigeration house is higher than or equal to the outdoor air temperature, the system is adjusted to the fresh air-regeneration exhaust total heat exchange working mode to operate; if the temperature of the refrigeration house is lower than the temperature of the outdoor air, the calculated mixed air temperature is continuously judged, and the relation between the mixed air temperature and the critical frosting temperature of the dehumidifying rotating wheel 3 is judged: when the T is higher than the critical frosting temperature of the dehumidification rotating wheel 3, the system operates in a fresh air bypass working mode; when T is less than or equal to the critical frosting temperature of the dehumidifying rotating wheel 3, the system is adjusted to the fresh air-regeneration exhaust full heat exchange working mode to operate.
On the basis, the heating power of the auxiliary heater 8 is adjusted in real time according to the dew point temperature sensor 13-4: when the dew point temperature is higher than the critical frosting temperature of the preset evaporator 4, the power of the auxiliary heater 8 is increased; when the dew point temperature is lower than the critical frosting temperature of the preset evaporator 4, the power of the auxiliary heater 8 is reduced;
the frequency of the compressor 10 is adjusted in real time according to the first temperature sensor 13-1: when the temperature detected by the first temperature sensor 13-1 is higher than the set temperature of the refrigeration house, the frequency of the compressor 10 is increased; when the temperature detected by the first temperature sensor 13-1 is lower than the set temperature of the refrigeration house, the frequency of the compressor 10 is reduced;
in conclusion, the heat pump rotating wheel coupling device for the frost-free refrigerator and the operation method thereof can ensure the continuous operation of a refrigeration system of the refrigerator and simultaneously avoid the frosting problem of a cold coil pipe, utilize the condensation heat of the refrigeration system to heat the dehumidification rotating wheel 3 to regenerate air, control the system operation according to the outdoor air temperature and the temperature of the refrigerator, improve the comprehensive utilization efficiency of energy and reduce the energy consumption of the refrigerator while ensuring the stable operation of the system.
The embodiments described above are intended to facilitate one of ordinary skill in the art in understanding and using the present invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the embodiments described herein, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (9)
1. The utility model provides a frostless for freezer heat pump runner coupling device which characterized in that: the evaporator comprises a heat pump rotating wheel dehumidification refrigeration system and a control system which are mutually connected and matched, fresh air, exhaust air and regenerated air circulation modes of a device are adjusted according to outdoor temperature, freezer temperature and critical frosting temperature of the dehumidification rotating wheel, and condensation heat generated during freezer refrigeration is fully utilized for dehumidification rotating wheel regeneration and fresh air heat exchange, so that the frostless operation of the evaporator for freezer refrigeration is met with relatively low system energy consumption;
the heat pump rotating wheel dehumidification refrigeration system comprises a total heat exchanger, a preheating condenser, a dehumidification rotating wheel, an evaporator, an air supply fan, a regeneration condenser, an auxiliary heater, an air exhaust fan, a compressor, a preheating expansion valve and a regeneration expansion valve which are mutually connected and matched; the control system comprises a controller, and a first electric air valve, a second electric air valve, a third electric air valve, a fourth electric air valve, a fifth electric air valve, a sixth electric air valve, a seventh electric air valve, a first temperature sensor, a second temperature sensor, a third temperature sensor and a dew point temperature sensor which are electrically connected with the controller; the controller is also electrically connected with a switch controller and a voltage regulating controller of the auxiliary heater;
the total heat exchanger is arranged between the fresh air passage and the exhaust passage and is used for heat exchange between fresh air and exhaust air; the preheating condenser, the evaporator and the air supply fan are positioned in an air supply passage in the device, the preheating condenser is positioned in front of a dehumidification rotary wheel dehumidification area, and the evaporator and the air supply fan are positioned in front of the dehumidification rotary wheel dehumidification area; the regeneration fan, the regeneration condenser and the auxiliary heater are positioned in a regeneration air passage in the device and are all positioned in front of the regeneration area of the dehumidification rotating wheel; the dehumidification area of the dehumidification rotating wheel is positioned in an air supply passage in the device, and the regeneration area of the dehumidification rotating wheel is positioned in a regeneration air passage in the device; the compressor, the preheating expansion valve and the regeneration expansion valve are arranged outside the device and form a heat pump system together with the preheating condenser, the evaporator and the regeneration condenser;
the operation method of the heat pump rotating wheel coupling device for the frost-free refrigerator comprises a fresh air bypass working mode, a fresh air-exhaust total heat exchange working mode and a fresh air-regeneration exhaust total heat exchange working mode;
the heating power of the auxiliary heater is adjusted in real time according to the dew point temperature sensor: when the dew point temperature is higher than the preset critical frosting temperature of the evaporator, the power of the auxiliary heater is increased; when the dew point temperature is lower than the preset critical frosting temperature of the evaporator, the power of the auxiliary heater is reduced;
the frequency of the compressor is adjusted in real time according to the first temperature sensor: when the temperature detected by the first temperature sensor is higher than the set temperature of the refrigeration house, the frequency of the compressor is increased; when the temperature detected by the first temperature sensor is lower than the set temperature of the refrigeration house, the frequency of the compressor is reduced.
2. The heat pump rotary wheel coupling device for the frost-free cold storage according to claim 1, wherein: the heat pump rotating wheel dehumidification refrigerating system further comprises a first air outlet, a second air outlet, a third air outlet, a fourth air outlet, a fifth air outlet, a sixth air outlet, a seventh air outlet and an eighth air outlet, wherein the first air outlet, the outdoor fresh air outlet and the sixth air outlet are connected, the second air outlet and the outdoor fresh air outlet are connected, the third air outlet and the return air inlet in the refrigeration house are connected, the fourth air outlet and the supply air outlet in the refrigeration house are connected, the fifth air outlet and the outdoor fresh air outlet are connected, the seventh air outlet and the outdoor air outlet are connected, and the eighth air outlet and the exhaust air outlet in the refrigeration house are connected.
3. The heat pump rotary wheel coupling device for the frost-free cold storage according to claim 1, wherein: a first output end of the compressor of the heat pump rotating wheel dehumidification refrigeration system is sequentially communicated with the input ends of the preheating condenser, the preheating expansion valve, the evaporator and the compressor through refrigerant pipes to form a first loop;
and the second output end of the compressor is communicated with the regenerative condenser, the regenerative expansion valve, the evaporator and the input end of the compressor in sequence through refrigerant pipes to form a second loop.
4. The heat pump rotary wheel coupling device for the frost-free refrigerator according to claim 2, wherein the heat pump rotary wheel dehumidification refrigeration system is provided with the first electric air valve on a full heat exchanger bypass pipeline between the first air outlet and the preheating condenser; the second electric air valve is arranged on the pipeline between the first air receiving outlet and the air exhaust outlet of the total heat exchanger; the third electric air valve is arranged on a pipeline between the second air receiving outlet and the fresh air inlet of the total heat exchanger; the fourth electric air valve is arranged on a pipeline between the second air receiving outlet and the exhaust fan; a fifth electric air valve is arranged on a connection outlet pipeline between the fifth air outlet and the regeneration fan; a sixth electric air valve is arranged on a connection outlet pipeline between the sixth connection outlet and the regeneration fan; the dehumidification runner regeneration area and a main passage of an air exhaust air inlet of the total heat exchanger are provided with the seventh electric air valve;
the third air outlet is provided with the first temperature sensor; the fifth air outlet is provided with the second temperature sensor; the third temperature sensor is arranged on a main passage at the outlet of the dehumidification rotating wheel regeneration area; the dew point temperature sensor is arranged between the dehumidification area of the dehumidification rotating wheel and the evaporator.
5. The operation method of the heat pump rotary wheel coupling device for the frost-free cold storage of claim 1, wherein the fresh air bypass operation mode comprises:
the second electric air valve, the third electric air valve, the sixth electric air valve and the seventh electric air valve are closed, and the first electric air valve, the fourth electric air valve and the fifth electric air valve are opened; closing the preheating expansion valve and opening the regeneration expansion valve; outdoor fresh air enters the device through the first air inlet and outlet, indoor exhaust air enters the device through the eighth air inlet and outlet, indoor return air enters the device through the third air inlet and outlet, and outdoor air enters the device through the fifth air inlet; fresh air is mixed with indoor return air through a bypass pipeline, and is dehumidified and cooled by a preheating condenser, a dehumidification rotating wheel dehumidification area and an evaporator in sequence and then is supplied to a refrigeration house through an air supply fan and a fourth air outlet; the indoor exhaust air is exhausted to the outside through a bypass pipeline and a second air outlet; and the outdoor air enters the device and then passes through the regeneration fan, the regeneration condenser, the auxiliary heater and the dehumidification rotating wheel regeneration area in sequence and then is exhausted to the outdoor through the seventh air outlet.
6. The operation method of the heat pump rotary wheel coupling device for the frost-free cold storage according to claim 1, wherein the fresh air-exhaust total heat exchange operation mode comprises:
the first electric air valve, the fourth electric air valve, the sixth electric air valve and the seventh electric air valve are closed, and the second electric air valve, the third electric air valve and the fifth electric air valve are opened; the preheating expansion valve is closed, and the regeneration expansion valve is opened; outdoor fresh air enters the device through a second air inlet, indoor exhaust air enters the device through an eighth air inlet, indoor return air enters the device through a third air inlet, and outdoor air enters the device through a fifth air inlet; fresh air enters the total heat exchanger through an air exhaust outlet of the total heat exchanger, exchanges heat with indoor exhaust air, flows out of the total heat exchanger through a fresh air outlet of the total heat exchanger, is mixed with indoor return air, is dehumidified and cooled sequentially through a preheating condenser, a dehumidifying rotating wheel dehumidifying area and an evaporator, and is supplied to a refrigeration house through an air supply fan and a fourth air outlet; indoor exhaust air enters the total heat exchanger through an exhaust air inlet of the total heat exchanger, exchanges heat with outdoor fresh air, flows out through an exhaust air outlet of the total heat exchanger, and is exhausted to the outside through a first air outlet; and the outdoor air enters the device and then passes through the regeneration fan, the regeneration condenser, the auxiliary heater and the dehumidification rotating wheel regeneration area in sequence and then is exhausted to the outdoor through the seventh air outlet.
7. The operation method of the heat pump rotary wheel coupling device for the frost-free cold storage according to claim 1, wherein the fresh air-regeneration exhaust air total heat exchange operation mode comprises:
the first electric air valve is closed, and the second electric air valve, the third electric air valve, the fourth electric air valve, the fifth electric air valve, the sixth electric air valve and the seventh electric air valve are opened; opening the preheating expansion valve and opening the regeneration expansion valve; outdoor fresh air enters the device through the second air inlet, indoor exhaust air enters the device through the eighth air inlet, indoor return air enters the device through the third air inlet, and outdoor air enters the device through the fifth air inlet; fresh air enters the total heat exchanger through a fresh air inlet of the total heat exchanger, exchanges heat with part of the dehumidification runner regenerated air, flows out of the total heat exchanger through a fresh air outlet of the total heat exchanger, is mixed with indoor return air, is dehumidified and cooled sequentially through a preheating condenser, a dehumidification runner dehumidification area and an evaporator, and is supplied to a refrigeration house through an air supply fan and a fourth air outlet; the indoor exhaust air is exhausted to the outside through a bypass pipeline and a second air outlet; the outdoor air enters the device through the fifth air inlet and then sequentially passes through the regeneration fan, the regeneration condenser, the auxiliary heater and the dehumidification rotating wheel regeneration area to be divided into two paths, one path of the outdoor air enters the total heat exchanger through the exhaust air inlet of the total heat exchanger to carry out heat exchange with fresh air, and the other path of the outdoor air is exhausted to the outdoor through the seventh air outlet.
8. The operation method of the heat pump rotary wheel coupling device for the frost-free cold storage according to claim 7, wherein: the opening of the preheating expansion valve is adjusted according to a fresh air ratio, sensible heat exchange efficiency of a total heat exchanger, critical frosting temperature of the dehumidifying runner and the air temperature after heat exchange air mixing obtained by calculating the outdoor temperature and the outlet air temperature of a regenerating area of the dehumidifying runner through real-time monitoring in a control system:
T m ＝T R (1-F r +ηF r )+T W (1-η)F r
in the formula: t is m The air temperature after heat exchange and air mixing is at the temperature of DEG C;
F r the fresh air ratio is input into the control system in advance;
T w -outdoor temperature, ° c;
T R the temperature of the air at the outlet of the regeneration area of the dehumidification rotating wheel is lower than the temperature of the air at the outlet of the regeneration area of the dehumidification rotating wheel;
eta, the heat exchange efficiency of the total heat exchanger, is input into the control system in advance.
9. The operation method of the heat pump rotary wheel coupling device for the frost-free cold storage according to claim 5 to 8, wherein:
the refrigeration house temperature value acquired by the first temperature sensor and the outdoor air temperature value acquired by the second temperature sensor are acquired in real time, and the two temperature values are compared in a control system;
when the temperature of the refrigeration house is required to be higher than the critical frosting temperature of the dehumidification rotating wheel and the temperature of the refrigeration house is lower than the outdoor air temperature, the operation is carried out in a fresh air-exhaust full heat exchange working mode;
when the temperature of the refrigeration house is required to be higher than the critical frosting temperature of the dehumidification rotating wheel and the temperature of the refrigeration house is equal to the outdoor air temperature, the operation is carried out in a fresh air bypass working mode;
when the temperature of the refrigeration house is required to be higher than the critical frosting temperature of the dehumidification rotating wheel and the temperature of the refrigeration house is higher than the temperature of the outdoor air, the judgment is carried out according to the detected temperature value of the outdoor air and the temperature value of the refrigeration house:
T＝F r T w +(1 r )T N
when T is higher than the critical frosting temperature of the dehumidifying rotating wheel: operating in a fresh air bypass working mode;
when T is less than or equal to the critical frosting temperature of the dehumidification rotating wheel: the operation is carried out in a fresh air-regenerative exhaust air total heat exchange working mode;
when the temperature of the refrigeration house is required to be equal to or lower than the critical frosting temperature of the dehumidification rotating wheel and the temperature of the refrigeration house is higher than or equal to the outdoor air temperature, the operation is carried out in a fresh air-regeneration exhaust total heat exchange working mode;
when the temperature requirement of the refrigeration house is equal to or lower than the critical frosting temperature of the dehumidification rotating wheel and the temperature of the refrigeration house is lower than the temperature of outdoor air, the judgment is carried out according to the detected temperature value of the outdoor air and the temperature value of the refrigeration house:
T＝F r T w +(1 r )T N
when T is higher than the critical frosting temperature of the dehumidifying wheel: operating in a fresh air bypass working mode;
when T is less than or equal to the critical frosting temperature of the dehumidification rotating wheel: the operation is carried out in a fresh air-regenerative exhaust air total heat exchange working mode.
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| CN116379523A (en) * | 2023-04-03 | 2023-07-04 | 南京五洲制冷集团有限公司 | Runner dehumidification air conditioning unit of integrated high temperature heat pump regeneration |
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| CN102635906A (en) * | 2012-05-15 | 2012-08-15 | 吕智 | Heat pump regeneration rotating wheel type total heat recovery humidity-adjusting and temperature-controlling fresh air handling unit and control method thereof |
| CN106594908B (en) * | 2017-01-25 | 2022-04-19 | 天津大学 | Frostless air source heat pump system with runner dehumidification |
| CN107816752B (en) * | 2017-11-21 | 2023-04-07 | 清华大学 | Dehumidifying and purifying composite fresh and return air treatment device |
| CN211261425U (en) * | 2019-12-27 | 2020-08-14 | 广州黑马科技有限公司 | Energy-saving device |
| CN211424563U (en) * | 2020-01-10 | 2020-09-04 | 同济大学 | Energy-saving type variable dehumidification heat pump type rotating wheel dehumidification unit |
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