CN212481864U - Central heat pump set and baking room system of distributing type fan coil combination - Google Patents
Central heat pump set and baking room system of distributing type fan coil combination Download PDFInfo
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- CN212481864U CN212481864U CN202020143630.5U CN202020143630U CN212481864U CN 212481864 U CN212481864 U CN 212481864U CN 202020143630 U CN202020143630 U CN 202020143630U CN 212481864 U CN212481864 U CN 212481864U
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Abstract
The utility model discloses a roast room system of central heat pump set and combination of distributing type fan coil, include: the system comprises a plurality of baking rooms, a fan coil is arranged in each baking room, and wet air in the baking rooms is heated and heated through the fan coil; the water tanks are provided with a water inlet and a water outlet, and each water tank is provided with a group of heat pump units; the water outlet is respectively communicated with the fan coil in each baking room through a plurality of water inlet pipelines, and the fan coil in each baking room is respectively communicated with the water inlet of the water tank through a water outlet pipeline to form a plurality of first heating water circulation channels; a second heating water circulation channel is formed between each water tank and the corresponding heat pump unit; a first electromagnetic valve is arranged on the first heating water circulating channel, and a second electromagnetic valve is arranged on the second heating water circulating channel; the water in each water tank is heated to different temperatures, and the fan coil of each curing barn selects the water tank with the corresponding temperature to be communicated according to the temperature requirement.
Description
Technical Field
The utility model relates to a roast room design technical field, concretely relates to roast room system of central heat pump set and distributed fan coil combination.
Background
Since the green development becomes the social concept, in the field of agricultural product drying, a drying heat pump replaces a coal-fired hot-blast stove, a gas-fired hot-blast stove and a fuel-fired hot-blast stove to gradually become a fashion.
Tobacco leaf heat pump baking is the focus in the field of agricultural product heat pump baking, through years of research and development of multiple heat pump enterprises, the tobacco leaf baking heat pump technology is gradually mature, and the tobacco leaf baking heat pump technology is gradually popularized and developed in a tobacco district with a heat pump baking room matched with a bulk type baking room and a heat preservation board room specified in 2009 national tobacco integrated 418.
However, most of the existing tobacco leaf curing rooms adopt a curing scheme that one tobacco leaf heat pump corresponds to one curing room, and as shown in fig. 1, the tobacco leaf curing has the following problems:
because the tobacco leaf baking time is long and is generally more than 170 hours, the baking process is very strict, the dry-wet bulb temperature in the baking room slowly changes in the baking process of 170 hours, the control precision requirement of the dry-wet bulb temperature does not exceed the target value +/-2 ℃, and the control precision requirement of the wet-wet bulb temperature does not exceed the target value +/-1 ℃, in order to adapt to the strict baking process, the heat pump baking room adopts a one-to-one matching mode that one heat pump unit corresponds to one baking room, and the heat pump unit continuously adjusts the self heating capacity and the dehumidification capacity in the operation process to meet the strict baking process requirement of the tobacco leaf;
according to the tobacco planting area, a flue-cured tobacco point or a flue-cured tobacco cooperative society establishes a dense-type curing barn according to the tobacco leaf planting area and the curing production quota of 20-30 mu of tobacco leaf for each curing barn, wherein the number of the curing barns is about 20;
this kind of a heat pump set corresponds the "one-to-one" cooperation mode in a roast room, has caused the very big waste of heat pump resource: in any time period of a tobacco curing season, more than 1/10 of the heat pump units of the curing barn are in a no-load tobacco charging state or a to-be-charged tobacco empty barn state, about 2/10 of the heat pump units are in a no-load moisture regain state after drying, about 2/10 of the heat pump units are in a very light-load tobacco curing yellowing period, and only the heat pump units less than 5/10 of the heat pump units are in a heavy-load state of tobacco curing, fixing color and drying ribs; that is to say, after the tobacco district electric network transformation which wastes time, labor and money and the self-contained power supply preparation, especially after the purchasing and installation of the valuable flue-cured tobacco heat pump units are completed under the 'one-to-one' matching mode that one heat pump unit corresponds to one curing barn, only less than 50% of the heat pump units are in the full-load operation state in any time period of the natural flue-cured tobacco season, and more than 50% of the heat pump units are in the no-load or extremely light-load state, so that the heat pump unit equipment resources are seriously wasted.
In addition, a scheme that a large central heat pump hot water unit is adopted to convey hot water to a fan coil of a multi-chamber baking room to heat the baking room in the prior art is adopted, and the scheme has the following problems:
the temperature of the water outlet of the central heat pump hot water unit is single, and at the same time, the baking rooms of each room operate in different process stages, and the temperatures of dry balls and wet balls are different; only regarding the temperature of the dry bulb of the curing barn, a plurality of temperature platforms of 33, 35, 38, 42, 48, 52, 58, 62, 68 ℃ and the like exist, the single water outlet temperature of the central heat pump hot water unit only needs to meet the heat consumption requirements of different curing barns for maintaining different dry bulb temperatures, and only needs to be high or low, the heat pump condenser group supplies hot water according to the highest temperature (generally over 70 ℃), so that the condensation pressure of the condenser in the shell-and-tube heat exchanger is high, the condensation temperature is high, the pressure difference between the suction pressure and the exhaust pressure of the compressor is increased, the compression ratio is increased, the phenomena of low heating power, low heating energy efficiency ratio and high compressor exhaust temperature are caused, the working condition of the compressor is deteriorated, and the curing barn at the low temperature position where the heat pump heating energy efficiency ratio is high and the water outlet temperature of the condenser group is low can also use high-temperature hot water uniformly, the heating energy efficiency ratio and the economy of the heat pump unit are lost.
SUMMERY OF THE UTILITY MODEL
To the problem in the background art, the utility model provides a roast room system of central heat pump set and distributed fan coil combination, include:
the system comprises a plurality of baking rooms, a fan coil is arranged in each baking room, and wet air in the baking rooms is heated and heated through the fan coil;
the system comprises at least two water tanks, a heat pump unit and a control unit, wherein the water tanks are provided with a water inlet and a water outlet, and each water tank is provided with a group of heat pump units;
the water outlet is respectively communicated with the fan coil in each baking room through a plurality of water inlet pipelines, the fan coil in each baking room is respectively communicated with the water inlet of the water tank through a water outlet pipeline to form a plurality of first heating water circulation channels, and the group heat pump unit is arranged at the water inlet or the water outlet of the water tank and used for heating water in the first heating water circulation channels; a second heating water circulation channel is formed between each water tank and the corresponding heat pump unit;
the first heating water circulation channel is provided with a first electromagnetic valve, and the second heating water circulation channel is provided with a second electromagnetic valve; the water in each water tank is heated to different temperatures, and the fan coil of each baking room selects the water tanks with corresponding temperatures to be communicated according to the respective temperature requirements.
Preferably, the system comprises two water tanks, namely a high-temperature water tank and a medium-temperature water tank, wherein a first heating water circulation channel is arranged between the high-temperature water tank and each fan coil; and a second heating water circulation channel is also respectively arranged between the medium-temperature water tank and each fan coil.
Preferably, the water heater comprises three water tanks, namely a high-temperature water tank, a medium-temperature water tank and a low-temperature water tank, wherein a first heating water circulation channel is respectively arranged between the high-temperature water tank and each fan coil, a first heating water circulation channel is respectively arranged between the medium-temperature water tank and each fan coil, and a first heating water circulation channel is also respectively arranged between the low-temperature water tank and each fan coil.
Preferably, the curing barn comprises a drying room and an equipment room, and a first ventilation opening and a second ventilation opening which are communicated are arranged between the drying room and the equipment room;
the fan coil is arranged in the equipment room, a fan is also arranged in the equipment room, and a moisture exhaust port and an air supply port are also arranged on the equipment room;
under the action of the fan, wet air in the drying room enters the equipment room from the first ventilation opening, part of the wet air is discharged out of the baking room from the moisture discharge opening, and part of the wet air flows through the fan coil pipe, is mixed with fresh air from the air supply opening, is heated, and is conveyed back to the drying room from the second ventilation opening.
Preferably, each set of heat pump unit comprises at least one heat pump hot water production device;
the heat pump hot water production device comprises a compressor, a condenser, a throttling device and an evaporator which are sequentially connected and form a refrigerant cycle;
wherein the external air flows through the evaporator;
the condenser adopts a shell-and-tube heat exchanger and comprises an inner tube for refrigerant to flow through and an outer tube sleeved on the inner tube, and the outer tube is communicated with the water inlet pipeline and the water outlet of the water tank.
Preferably, each group of heat pump units comprises a plurality of heat pump hot water production devices, and the plurality of heat pump hot water production devices are arranged in parallel.
Preferably, a plurality of said curing barn are arranged next to each other in a row; the water tank and the heat pump unit are arranged at the top of the curing barn.
Preferably, the electromagnetic valve further comprises a control device connected with each of the first electromagnetic valve and the second electromagnetic valve and used for controlling the on-off of the first electromagnetic valve and the second electromagnetic valve.
The utility model discloses owing to adopt above technical scheme, make it compare with prior art, have following advantage and positive effect:
saving more heat pump product resources
The utility model discloses a plurality of heat pump set that run side by side are as public heat source, and the hot water of the output multichannel multiple temperature is served to the intensive roast room system that constitutes by the roast room of a relatively large amount, and for "one-to-one" cooperation mode that an existing heat pump set corresponds a roast room, the utility model discloses the total heating capacity of heat pump heating unit reduces about 50%, and heat pump heating unit total cost reduces about 30% along with it, practices thrift heat pump product resource by a wide margin;
taking the flue-cured tobacco as an example for explanation, under the large-scale conditions of tobacco planting, such as 20 rooms of a bulk curing barn, the service planting area is 400 plus 500 mu, the varieties of the tobacco are the same, the transplanting periods are close, the harvesting page ages of the tobacco suitable for curing at the same parts of tobacco plants are also approximately the same, and according to the continuous and uniform production load requirements of manual harvesting, tobacco weaving, curing, moisture regaining and tobacco discharging of the tobacco, under the 'one-to-one' matching mode that one existing heat pump unit corresponds to one curing barn, the energy states of the heat pump curing barn in any time period of the tobacco curing season are approximately as follows: 1/10 (2) above is in a no-load tobacco loading state or a to-be-loaded tobacco empty room state, about 2/10 (4) is in a no-load moisture regain state, about 2/10 (4) is in a very light load tobacco leaf baking yellowing period, and only about less than 5/10 (10) is in a heavy load state of tobacco leaf baking, color fixing and drying; however, the utility model relates to a central heat pump set and distributed fan coil combination baking house group curing barn system, the central heat pump set is in 100% full load or is close full load's running state in any period of flue-cured tobacco season.
② multi-path multi-temperature hot water output with high energy efficiency
The utility model adopts a plurality of heat pump units running in parallel to output multipath multi-temperature hot water, outputs actually required heat through fan coil pipes distributed in a plurality of curing barn according to different tobacco curing process stages of each curing barn, establishes and maintains the temperature of dry and wet balls of each curing barn, and meets the individual heat requirement of each curing barn; the core index of the heat pump heating unit is heating energy efficiency ratio which is mainly determined by the circulating temperature difference (condensation temperature-evaporation temperature) of the heat pump heating unit, the heating energy efficiency ratio is high when the circulating temperature difference is small, the heating energy efficiency ratio is low when the circulating temperature difference is large, and the heating energy efficiency ratio is reduced by about 25% when the circulating temperature difference of the steam compression type heat pump unit is increased by 10 ℃; and be in the roast room of 3 different baking process stages of becoming yellow, the fixation, the dry muscle, the room interior air current is done the ball temperature difference greatly, is respectively below 44, 54, 68 ℃, the utility model discloses a multichannel multiple temperature hot water output, carry low temperature (about 46 ℃), medium temperature (about 56 ℃), high temperature (about 70 ℃) hot water that a plurality of heat pump set produced respectively to be in becoming yellow, fixation, roast room between each of dry muscle stage, overcome single big heat pump set condenser leaving water temperature "just not just low" problem, protected the higher energy efficiency of producing medium temperature (about 56 ℃) leaving water heat pump set and the high energy efficiency of producing low temperature (about 46 ℃) leaving water heat pump set to the holistic comprehensive high energy efficiency that heats of central heat pump hot water set that has been realized compriseing a plurality of heat pump set.
Drawings
The above and other features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic structural view of a conventional curing barn;
FIG. 2 is a schematic structural diagram of a baking room system in which a central heat pump unit and a distributed fan coil are combined in embodiment 1;
FIG. 3 is a schematic view showing the structure of a curing barn in example 1;
FIG. 4 is a schematic view showing the connection among the heat pump unit, the water tank and the curing barn in embodiment 1;
FIG. 5 is a schematic view showing the circulation of heated water in each curing barn according to embodiment 1;
FIG. 6 is a schematic structural view of a baking room system in which a central heat pump unit and a distributed fan coil are combined in embodiment 2;
FIG. 7 is a schematic view showing the circulation of heated water in each curing barn in embodiment 2.
Detailed Description
The invention will be described in more detail hereinafter with reference to the accompanying drawings showing embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity.
The utility model provides a curing barn system combining a central heat pump unit and a distributed fan coil, which comprises a plurality of curing barns and at least two water tanks; a fan coil is arranged in each baking room, and wet air in the baking room is heated and dried by the fan coil; the water tanks are provided with a water inlet and a water outlet, and each water tank is provided with a group of heat pump units; the water outlet is respectively communicated with the fan coil in each baking room through a plurality of fan coil water inlet pipelines, the fan coil in each baking room is respectively communicated with the water inlet of the water tank through a fan coil water outlet pipeline to form a plurality of first heating water circulation channels, and the group heat pump unit is arranged at the water inlet or the water outlet of the water tank and is used for heating water in the first heating water circulation channels; a second heating water circulation channel is formed between each water tank and the corresponding heat pump unit; a first electromagnetic valve is arranged on the first heating water circulating channel, and a second electromagnetic valve is arranged on the second heating water circulating channel; the water in each water tank is heated to different temperatures, and the water tanks with corresponding temperatures are selected to be communicated according to the temperature requirements in each baking room.
The utility model provides a baking house system with a central heat pump unit and a distributed fan coil combined, which is designed with a plurality of water tanks, and each water tank is respectively provided with a heat pump unit for heating water, so that each water tank can obtain hot water with different temperatures and output multi-path multi-temperature hot water; and each curing barn is respectively connected with the water tanks with different temperatures to form a first hot water circulation for supplying hot water and circulating, so that the water tanks with different temperatures can be selected for hot circulation according to needs in each curing barn, heat is transferred to the fan coil of the curing barn, and the wet air in the curing barn is heated, thereby meeting the heat requirements of the curing barns with different curing processes.
The temperature of each water tank can heat water in the water tank through a second heating water circulation channel between the heat pump unit and the water tank, and when the target temperature is reached, the clamping room is heated through the first heating water circulation channel.
The number of the water tanks is adjusted according to the temperature required by the baking stage of the baked object, and is not limited herein.
The mutual position relation of the setting quantity meanings of the curing barn can be adjusted according to specific conditions, and the position relation is not limited.
The utility model provides a pair of central heat pump set and distributed fan coil combination baking house system has following beneficial effect:
saving more heat pump product resources
The utility model discloses a plurality of heat pump set that run side by side are as public heat source, and the hot water of the multi-temperature of output multichannel is served to the intensive roast room system that constitutes by the roast room of a relatively large amount, and for "one-to-one" cooperation mode that an existing heat pump set corresponds a roast room, the utility model discloses heat pump heating unit always heats the ability and reduces about 50% at any moment, and heat pump heating unit total cost reduces about 30% along with it, practices thrift heat pump product resource by a wide margin;
taking the flue-cured tobacco as an example for explanation, under the large-scale conditions of tobacco planting, such as 20 rooms of a bulk curing barn, the service planting area is 400 plus 500 mu, the varieties of the tobacco are the same, the transplanting periods are close, the harvesting page ages of the tobacco suitable for curing at the same parts of tobacco plants are also approximately the same, and according to the continuous and uniform production load requirements of manual harvesting, tobacco weaving, curing, moisture regaining and tobacco discharging of the tobacco, under the 'one-to-one' matching mode that one existing heat pump unit corresponds to one curing barn, the energy states of the heat pump curing barn in any time period of the tobacco curing season are approximately as follows: 1/10 (2) above is in a no-load tobacco loading state or a to-be-loaded tobacco empty room state, about 2/10 (4) is in a no-load moisture regain state, about 2/10 (4) is in a very light load tobacco leaf baking yellowing period, and only about less than 5/10 (10) is in a heavy load state of tobacco leaf baking, color fixing and drying; however, the utility model relates to a central heat pump set and distributed fan coil combination baking house group curing barn system, the central heat pump set is in 100% full load or is close full load's running state in any period of flue-cured tobacco season.
② multi-path multi-temperature hot water output with high energy efficiency
The utility model adopts a plurality of heat pump units running in parallel to output multipath multi-temperature hot water, outputs actually required heat through fan coil pipes distributed in a plurality of curing barn according to different tobacco curing process stages of each curing barn, establishes and maintains the temperature of dry and wet balls of each curing barn, and meets the individual heat requirement of each curing barn;
the core index of the heat pump heating unit is heating energy efficiency ratio which is mainly determined by the circulating temperature difference (condensation temperature-evaporation temperature) of the heat pump heating unit, the heating energy efficiency ratio is high when the circulating temperature difference is small, the heating energy efficiency ratio is low when the circulating temperature difference is large, and the heating energy efficiency ratio is reduced by about 25% when the circulating temperature difference of the steam compression type heat pump unit is increased by 10 ℃; and be in the roast room of 3 different baking process stages of becoming yellow, the fixation, the dry muscle, the room interior air current is done the ball temperature difference greatly, is respectively below 44, 54, 68 ℃, the utility model discloses a multichannel multiple temperature hot water output, carry low temperature (about 46 ℃), medium temperature (about 56 ℃), high temperature (about 70 ℃) hot water that a plurality of heat pump set produced respectively to be in becoming yellow, fixation, roast room between each of dry muscle stage, overcome single big heat pump set condenser leaving water temperature "just not just low" problem, protected the higher energy efficiency of producing medium temperature (about 56 ℃) leaving water heat pump set and the high energy efficiency of producing low temperature (about 46 ℃) leaving water heat pump set to the holistic comprehensive high energy efficiency that heats of central heat pump hot water set that has been realized compriseing a plurality of heat pump set.
The following further description is made with respect to specific embodiments:
example 1
Referring to fig. 1 to 5, in the present embodiment, two water tanks are included, namely a high temperature water tank 2 and a medium temperature water tank 3, the high temperature water tank 2 is equipped with a heat pump unit 4, and the medium temperature water tank 3 is equipped with a heat pump unit 5.
In the present embodiment, ten curing barn are taken as an example for illustration, and the specific number of curing barns can be adjusted according to specific needs in other embodiments. Ten curing barns are arranged closely in a row in sequence; the high-temperature water tank 2, the medium-temperature water tank 3, the heat pump unit 4 and the heat pump unit are all arranged at the top of the curing barn. The arrangement is favorable for saving land use area.
Further, referring to fig. 3, the concrete structure of the curing barn 1 is further described by taking the curing barn as an example; the curing barn 1 comprises a drying room 101 and an equipment room 102, and a first ventilation opening 103 and a second ventilation opening 104 which are communicated are arranged between the drying room 101 and the equipment room 102; the fan coil 105 is arranged in the equipment room 102, and the main water outlet pipe 6 and the main water inlet pipe 7 of the fan coil 105 are led out of the equipment room 102; a fan 106 is also arranged in the equipment room 102, and a moisture exhaust port 107 and an air supplement port 108 are also arranged on the equipment room; the wet air in the drying room 101 enters the equipment room 102 from the first ventilation opening 103 under the action of the fan 106, a part of the wet air is discharged out of the baking room from the moisture discharge opening 107, a part of the wet air is heated and dehumidified by flowing through the fan coil 105, is mixed with fresh air from the air supply opening 108, is conveyed back to the drying room 101 from the second ventilation opening 104, dries the articles in the drying room 101, becomes wet air, and is conveyed into the equipment room 102 through the first ventilation opening 103, and the drying is realized through the circulation operation.
In this embodiment, the fan coil and the high temperature water tank 2 in each baking room form a first heating water cycle, and the fan coil and the medium temperature water tank 3 in each baking room form another first heating water cycle running in parallel, which will be further described with reference to fig. 4 by taking the connection mode of the baking room 1 as an example.
Specifically, a fan coil in the baking room 1 is connected with a total water outlet pipe 6 and a total water inlet pipe 7, and the total water outlet pipe 6 is respectively communicated with the high-temperature water tank 2 through a water outlet pipeline 9 and the medium-temperature water tank 3 through a water outlet pipeline 11; the total water inlet pipeline 7 is communicated with the heat pump unit 4 corresponding to the high-temperature water tank 2 through the water inlet pipeline 8, is communicated with the heat pump unit 5 corresponding to the medium-temperature water tank 3 through the water inlet pipeline 10, and the connection modes of the rest of baking rooms and the high-temperature water tank 2 and the medium-temperature water tank 3 can be referred to above, and are not repeated herein.
The fan coils in the baking rooms are used for being connected with water outlet pipelines of the high-temperature water tank 2 in parallel and then connected to the water pipes 13, and the water pipes 13 are communicated with a water inlet of the high-temperature water tank 2; the fan coils in the baking rooms are used for connecting water outlet pipelines of the middle medium temperature water tank 3 in parallel and then are communicated with a water inlet of the middle medium temperature water tank 3 through a water pipe;
the fan coils in the baking rooms are used for being connected with water inlet pipelines of the heat pump unit 4 in parallel and then connected to the water pipe 12, and the water pipe 12 is communicated with a water outlet of the heat pump unit 4; the fan coil pipes in the baking rooms are used for being connected with water inlet pipelines of the heat pump unit 5 in parallel and then communicated with a water outlet of the heat pump unit 5 through a water pipe;
therefore, the fan coil in each curing barn is connected with the high-temperature water tank 2 and the heat pump unit 4 to form a first heating water circulation of high-temperature water circulation, and the fan coil in each curing barn is connected with the medium-low high-temperature water tank 3 and the heat pump unit 5 to form a first heating water circulation for medium-low temperature water circulation.
Furthermore, each of the formed first heating water circulation is provided with a first electromagnetic valve for controlling on-off of the controller, and taking the curing barn 1 as an example, on the first heating water circulation formed between the curing barn 1 and the high-temperature water tank 2, the controller is controlled to be on-off by arranging a first electromagnetic valve 12 on the water inlet pipeline 8 and a first electromagnetic valve 13 on the water outlet pipeline 9; on a first heating water circulation formed between the curing barn 1 and the medium temperature water tank 3, the on-off of a controller is controlled by arranging a first electromagnetic valve 14 on the water inlet pipeline 10 and a first electromagnetic valve 15 on the water outlet pipeline 11; the arrangement scheme of the electromagnetic valve on the first heating water circulation communicated with the fan coil in the other baking rooms can be referred to the above description, and the description is omitted here.
In this embodiment, the heat pump unit 4 for heating water in the high temperature water tank 2 includes two heat pump hot water production devices, but in other embodiments, the heat pump unit 4 may include only one heat pump hot water production device or may include more than two heat pump hot water production devices, and the disclosure is not limited thereto. Specifically, the heat pump unit 4 comprises a heat pump hot water production device 401 and a heat pump hot water production device 402, wherein the heat pump hot water production device 401 and the heat pump hot water production device 402 are connected in parallel, the water inlet ends of the heat pump hot water production device 401 and the heat pump hot water production device 402 are connected in parallel and then communicated with the water outlet of the high-temperature water tank 2, and the water outlet ends of the heat pump hot water production device 401 and the heat pump hot water production device 402 are connected in parallel and then distributed to; further, an electromagnetic valve 19 is additionally arranged on the water pipe 12 for further controlling the on-off of the heating water circulation.
In this embodiment, the heat pump unit 5 for heating water in the medium temperature water tank 3 includes three heat pump hot water production devices, but in other embodiments, the heat pump unit may include only one heat pump hot water production device, or only two or more heat pump hot water production devices, and the disclosure is not limited thereto. The three heat pump hot water production devices are respectively a heat pump hot water production device 501, a heat pump hot water production device 502 and a heat pump hot water production device 503, and the connection modes between the three heat pump hot water production devices, the medium temperature water tank and the heat pump unit 5 can refer to the connection mode in the heat pump unit 4, and the connection modes are not limited in the above and can be adjusted according to specific needs.
In this embodiment, an independent second heating water circulation channel 20 is arranged between the heat pump unit 4 and the high-temperature water tank 2, and a second electromagnetic valve 16 is arranged on the other second heating water circulation channels 20 and is used for controlling the on-off of the second heating water circulation channel 20; under the initial condition, the high-temperature water tank 2 does not reach the target high temperature, at this time, the first heating water circulation channel between the high-temperature water tank 2 and each curing barn can be closed (in the case of the curing barn 1, the first electromagnetic valve 12 and the first electromagnetic valve 13 are closed), the second electromagnetic valve 16 is opened, after the water in the high-temperature water tank 2 is circularly heated to the target temperature, the second heating water circulation channel 20 is closed by closing the second electromagnetic valve 16, and the first electromagnetic valve on the first heating water circulation channel on the curing barn which needs to convey the high-temperature water is opened.
Similarly, an independent second heating water circulation channel is also arranged between the heat pump unit 5 and the medium temperature water tank 3, and the arrangement mode thereof refers to the second heating water circulation channel 20 between the heat pump unit 4 and the high temperature water tank 2, which is not limited herein.
In this embodiment, the baking room system with the central heat pump unit and the distributed fan coil combined further includes a control device connected to each of the first electromagnetic valve and the second electromagnetic valve for controlling on/off of the first electromagnetic valve and the second electromagnetic valve. The control device may be an electromagnetic water valve box shown in fig. 5, or may be a computer system, which is not limited herein.
In this embodiment, the heat pump hot water production device comprises a compressor, a condenser, a throttling device and an evaporator which are connected in sequence and form a refrigerant cycle; wherein the outside air flows through the evaporator; the condenser adopts a shell-and-tube heat exchanger and comprises an inner tube for refrigerant to flow through and an outer tube sleeved on the inner tube, and the outer tube is communicated with a water inlet pipeline and a water outlet of the water tank.
The working principle of the heat pump hot water production device is as follows:
the refrigerant absorbs heat energy of air in the evaporator to become low-pressure steam, the low-pressure steam is sucked by the compressor to be compressed into high-temperature high-pressure steam, the high-temperature high-pressure steam is discharged into an inner pipe in the shell-and-tube heat exchanger, heat is released to water flow between the outer shell and the inner pipe and then condensed into refrigerant liquid, the refrigerant liquid is decompressed by the throttling device and flows into the evaporator again, and therefore a new cycle of circulation is carried out, and heat energy in air serving as a low-temperature heat source is continuously pumped into hot water serving as a high-temperature heat source through the.
In the single-stage compression type heat pump hot water production device operated in this way, the heating efficiency (energy efficiency ratio) is mainly determined by the condensation pressure (condensation temperature) and the evaporation pressure (evaporation temperature) of the heat pump system;
because the evaporation temperature of the heat pump system must be lower than the temperature of the ambient air, the liquid refrigerant in the evaporator can absorb heat from the air outside the evaporator, and is evaporated and vaporized; the evaporation pressure of the heat pump system is mainly determined by the temperature of ambient air, and when the ambient temperature is low, the evaporation pressure is low, the density of refrigerant gas sucked by the compressor is low, the refrigerant circulation amount is small, and the heating capacity is poor; the high ambient temperature is high, and evaporation pressure is high, and the density of the refrigerant gas that the compressor inhales is big, and refrigerant circulation volume is big, and heating capacity is strong. The condensation temperature of the heat pump hot water system is higher than the hot water temperature, the refrigerant gas in the condenser can release heat for condensation and liquefaction, and the heat is released to the hot water outside the condenser in the shell and tube heat exchanger; therefore, the condensing pressure of the heat pump hot water unit is mainly determined by the temperature of hot water in the shell and tube, the condensing pressure is low when the temperature of the hot water is low, the working condition of the compressor is good, and the energy efficiency ratio of the heat pump system is high; when the temperature of hot water rises, the condensing pressure rises, the working condition of the compressor is worsened, and the energy efficiency ratio of the heat pump system is reduced.
For a heat pump hot water production device, if the environment (low temperature heat source) temperature is high (e.g. 15 ℃), the hot water (high temperature heat source) temperature is low (e.g. 25 ℃), the evaporation pressure in the evaporator of the heat pump system is high (using R22 can reach more than 6 atm), the condensation pressure in the condenser is low (about 12atm), the pressure difference between the suction pressure and the discharge pressure of the compressor is small, the compression ratio is small, the discharge temperature of the compressor is low, the working condition of the compressor is good, the refrigerating capacity is extremely strong, the heating capacity is extremely strong, and the energy efficiency ratio (the ratio of the heating power to the consumed power) reaches more than 7 times.
However, if the ambient temperature is low and the hot water temperature is high, the evaporation pressure of the evaporator of the heat pump system is low, the condensation pressure of the condenser is high, the pressure difference between the suction pressure and the discharge pressure of the compressor is increased, the compression ratio is increased, the phenomena of heating power reduction, heating energy efficiency ratio reduction and compressor discharge temperature increase, which are two-low and one-high, are caused, and the working condition of the compressor is deteriorated.
Referring to table 1, according to data published by the U.S. brand compressor "valley wheel" manufacturer, the relationship between different evaporating temperatures, condensing temperatures, and motor suction power P and heating power (heating capacity) H for a ZW108KS three-phase scroll compressor using R22 refrigerant is as follows:
referring to the above table as the relationship between different evaporation temperatures, condensation temperatures, and motor suction power P and heating power (heating amount) H of the ZW108KS three-phase scroll compressor;
as can be seen from the table, under the condition that the evaporation temperature is 15 ℃ and the condensation temperature is 25 ℃, the compressor sucks the electric power 4435W and the heating quantity 47595W, and the heating efficiency is as high as 10.7 (the electric power of a water pump of a fan is still more than 7); however, the ZW108KS compressor sucks electric power 9825W and heating quantity 15858W under the conditions of evaporation temperature of-25 ℃ and condensation temperature of +65 ℃, and the heating efficiency is reduced to 1.61 (the electric power of a fan and a water pump is added is less than 1.3); compared with the previous working condition, the suction electric power of the compressor is increased by 121%, the heating capacity is reduced by 66.7%, the phenomena of two-low one-high of the reduction of the heating power, the reduction of the heating energy efficiency ratio and the increase of the exhaust temperature of the compressor occur, and the working condition of the compressor is seriously deteriorated. This is also laboratory data, and in an actual heating system, because of the on-way resistance of the evaporator and the condenser, the repeated reverse defrosting on the evaporator during the operation of the system, and other factors, the heating efficiency of the system is less than 1.3, which is close to the efficiency of direct heating by the resistance wire, and the high energy efficiency ratio and high economy of the heat pump are lost.
This is a corollary to heat pumps that operate with large temperature differences, large pressure differences, and high compression ratios between the condenser and the evaporator.
Therefore, the fundamental way to improve the energy efficiency ratio and the working condition of the heat pump system is to increase the evaporation pressure and reduce the condensation pressure, i.e. to raise the temperature of the low-temperature heat source as much as possible and to lower the temperature of the high-temperature heat source (heated medium) as much as possible.
The utility model provides a pair of central authorities' heat pump hot water unit and distributed fan coil combination roast room system, according to above-mentioned heat pump heating operation theory, adopt two kinds of water temperature of medium and high temperature, medium temperature, make to be in the medium temperature state roast room and can select the medium temperature play water of the heat pump hot water production device that has the higher efficiency ratio that heats, solved the roast room of medium and low temperature and can only use the problem of the extravagant energy of low efficiency ratio high temperature hot water that heats, its useful part is:
saving more heat pump product resources
The utility model discloses a 5 middle heat pump hot water production devices that move side by side serve as public heat source module, export 2 way 2 temperature hot water, serve the intensive roast room system that constitutes by 10 roast rooms, for the "one-to-one" cooperation mode that an existing heat pump set corresponds a roast room, the utility model discloses heat pump set module total heating capacity reduces about 50%, and heat pump set total cost reduces about 30% thereupon, practices thrift heat pump product resource by a wide margin;
further the utility model discloses still can install the electricity additional at partial baking house fan coil's air outlet and assist the heat to supply the heat supply ability of heat pump unit when the heavy load stoving production accident is short of, in order to deal with the accident phenomenon such as gathering in a large number because rainfall tobacco leaf assaults in succession.
② double-temperature hot water output, high energy efficiency
The utility model adopts 5 heat pump hot water production devices running in parallel to output 2 paths of hot water with 2 temperatures, outputs actually required heat through fan coil pipes distributed in 10 curing rooms according to different tobacco curing process stages of each curing room, establishes and maintains the dry and wet ball temperature of each curing room, and meets the individual heat requirement of each curing room;
the core index heating energy efficiency ratio of the heat pump unit is mainly determined by the heat pump unit circulation temperature difference (condensation temperature-evaporation temperature), the heating energy efficiency ratio is high when the circulation temperature difference is small, the heating energy efficiency ratio is low when the circulation temperature difference is large, and the heating energy efficiency ratio is reduced by about 25% when the circulation temperature difference of the steam compression heat pump unit is increased by 10 ℃; and in the roast room of 3 different baking process stages of becoming yellow, the fixation, the dry muscle, the room air dry bulb temperature difference is very big, below 44, 54, 68 ℃ respectively, the utility model discloses a 2 way 2 temperature hot water output, carry the medium temperature (about 56 ℃), high temperature (about 70 ℃) hot water that 5 heat pump set produced respectively to be in the roast room of becoming yellow, fixation, each of dry muscle stage, overcome single big heat pump set condenser leaving water temperature "just about low" problem, protected the high energy efficiency of producing medium temperature (about 56 ℃) leaving water heat pump set to realized that the whole comprehensive of central heat pump unit module that comprises 5 heat pump set heats high energy efficiency;
thirdly, the machine set is jacked up to improve the air exhaust and save the land
In a one-to-one matching mode that one heat pump unit corresponds to one curing barn, the heat pump unit is usually arranged on the ground behind the curing barn, and the air outlet of an outer heat exchanger of the heat pump is usually blocked by an enclosing wall, a soil protection slope or another row of intensive curing barn, so that the air outlet static pressure of the outer heat exchanger is increased, the air volume is reduced, and the ratio of heating capacity to heating energy efficiency is reduced;
the utility model discloses set up heat pump set on intensive roast house top, the outer heat exchanger is inhaled the exhaust and is smooth and easy, and outer heat exchanger exhaust cold wind easily spreads, has practiced thrift the heat pump set area of taking up under the "one-to-one" cooperation mode that existing heat pump set corresponds roast room simultaneously.
Example 2
Referring to fig. 6-7, this embodiment is adjusted based on embodiment 1, and compared to embodiment 1, this embodiment includes three water tanks, namely, a high temperature water tank 2, a medium temperature water tank 17 and a low temperature water tank 18, for conveying hot water at a medium temperature of 3 with books, so as to satisfy the baking process at 3 temperatures required by the baking room; the high-temperature water tank 2, the medium-temperature water tank 17 and the low-temperature water tank 18 are respectively provided with a group of heat pump units, the heat pump units arranged on the high-temperature water tank 2 comprise two heat pump hot water production devices connected in parallel, the heat pump units arranged on the medium-temperature water tank 17 comprise two heat pump hot water production devices connected in parallel, and the heat pump units arranged on the low-temperature water tank 18 comprise one heat pump hot water production device.
Of course, in other embodiments, the number of the heat pump hot water production devices included in the heat pump units respectively equipped in the high-temperature water tank 2, the medium-temperature water tank 17, and the low-temperature water tank 18 may be adjusted according to specific needs, and is not limited herein.
In this embodiment, the detailed structures of the curing barn, the water tank, and the heat pump hot water production device and the connection relationship therebetween can be referred to the description in embodiment 1, and are not repeated herein.
The central heat pump hot water unit and distributed fan coil combined baking room system provided by the embodiment has three water outlet temperatures, and has the advantages that: saving more heat pump product resources
The utility model discloses a 3 group 5 heat pump hot water production devices that move side by side are as public heat source module, and 3 way 3 temperature hot water of output is served to the intensive roast room crowd that comprises 10 roast tobacco houses, and for "one-to-one" cooperation mode that an existing heat pump set corresponds a roast room, the utility model discloses heat pump set module total heating capacity reduces about 50%, and heat pump set total cost reduces thereupon, practices thrift heat pump product resource by a wide margin;
② 3 hot water output at 3 temperatures with high energy efficiency
The utility model discloses 5 heat pump hot water production devices of 3 groups are because introducing the inverter compressor technique, 3 way 3 temperature (46 ℃, 56 ℃, 70 ℃) hot water's output and the elasticity of temperature are bigger to the side by side operation, can adapt to environment temperature and neglect high and neglect low better, the dress cigarette volume neglect little, tobacco leaf harvesting toasts production chronogenesis inhomogeneous unstable operating mode such as etc. through the fan coil who distributes in 10 tobacco flue-curing houses, according to the different tobacco leaf toasting process stages that each tobacco flue-curing house is located, export the heat of actual need, establish and maintain each tobacco flue-curing house and dry and wet bulb temperature, satisfy the individualized heat demand of each tobacco flue-curing house;
the utility model discloses a frequency conversion technology, implement 3 way 3 temperature hot water outputs, low temperature (about 46 ℃), medium temperature (about 56 ℃), high temperature (about 70 ℃) hot water carries respectively to be in becoming yellow, the fixation, each room of tobacco curing barn of dry muscle stage, overcome single big heat pump set condenser leaving water temperature "just high not just low" problem, guaranteed heating capacity elasticity and the smoothness of curing barn wet bulb temperature, protected the higher efficiency of producing medium temperature (about 56 ℃) leaving water heat pump set and produced low temperature (about 46 ℃) leaving water heat pump set's high energy efficiency, thereby realized the holistic comprehensive heating high energy efficiency of central heat pump hot water unit module that comprises 3 groups of 5 heat pump sets;
thirdly, the machine set is jacked up to improve the air exhaust and save the land
In a one-to-one matching mode that one heat pump unit corresponds to one curing barn, the heat pump unit is usually arranged on the ground behind the curing barn, and the air outlet of an outer heat exchanger of the heat pump is usually blocked by an enclosing wall, a soil protection slope or another row of intensive curing barn, so that the air outlet static pressure of the outer heat exchanger is increased, the air volume is reduced, and the ratio of heating capacity to heating energy efficiency is reduced;
the utility model discloses set up heat pump set on intensive tobacco flue-curing house roof, the outer heat exchanger is inhaled the exhaust and is smooth and easy, and outer heat exchanger exhaust cold wind easily spreads, has practiced thrift the heat pump set area of taking up under the "one-to-one" cooperation mode that existing heat pump set corresponds a curing barn simultaneously.
It will be appreciated by those skilled in the art that the invention can be embodied in many other specific forms without departing from the spirit or scope thereof. Although embodiments of the present invention have been described, it is to be understood that the present invention should not be limited to those precise embodiments, and that various changes and modifications can be effected therein by one skilled in the art without departing from the scope or spirit of the invention as defined by the appended claims.
Claims (8)
1. The utility model provides a roast room system of central heat pump set and distributed fan coil combination which characterized in that includes:
the system comprises a plurality of baking rooms, a fan coil is arranged in each baking room, and wet air in the baking rooms is heated and heated through the fan coil;
the system comprises at least two water tanks, a heat pump unit and a control unit, wherein the water tanks are provided with a water inlet and a water outlet, and each water tank is provided with a group of heat pump units;
the water outlet is respectively communicated with the fan coil in each baking room through a plurality of water inlet pipelines, the fan coil in each baking room is respectively communicated with the water inlet of the water tank through a water outlet pipeline to form a plurality of first heating water circulation channels, and the group heat pump unit is arranged at the water inlet or the water outlet of the water tank and used for heating water in the first heating water circulation channels; a second heating water circulation channel is formed between each water tank and the corresponding heat pump unit;
the first heating water circulation channel is provided with a first electromagnetic valve, and the second heating water circulation channel is provided with a second electromagnetic valve; the water in each water tank is heated to different temperatures, and the fan coil of each baking room selects the water tanks with corresponding temperatures to be communicated according to the respective temperature requirements.
2. The baking room system combining the central heat pump unit and the distributed fan coils as claimed in claim 1, comprising two water tanks, namely a high-temperature water tank and a medium-temperature water tank, wherein a first heating water circulation channel is respectively arranged between the high-temperature water tank and each fan coil; and a second heating water circulation channel is also respectively arranged between the medium-temperature water tank and each fan coil.
3. The central heat pump unit and distributed fan coil combined baking room system according to claim 1, comprising three water tanks, namely a high temperature water tank, a medium temperature water tank and a low temperature water tank, wherein a first heating water circulation channel is respectively arranged between the high temperature water tank and each fan coil, a first heating water circulation channel is respectively arranged between the medium temperature water tank and each fan coil, and a first heating water circulation channel is also respectively arranged between the low temperature water tank and each fan coil.
4. The curing barn system combining the central heat pump unit and the distributed fan coil according to claim 1, wherein the curing barn comprises a drying room and an equipment room, and a first ventilation opening and a second ventilation opening which are communicated are arranged between the drying room and the equipment room;
the fan coil is arranged in the equipment room, a fan is also arranged in the equipment room, and a moisture exhaust port and an air supply port are also arranged on the equipment room;
under the action of the fan, wet air in the drying room enters the equipment room from the first ventilation opening, part of the wet air is discharged out of the baking room from the moisture discharge opening, and part of the wet air flows through the fan coil pipe, is mixed with fresh air from the air supply opening, is heated, and is conveyed back to the drying room from the second ventilation opening.
5. The curing barn system according to claim 1, wherein each heat pump unit comprises at least one heat pump hot water production device;
the heat pump hot water production device comprises a compressor, a condenser, a throttling device and an evaporator which are sequentially connected and form a refrigerant cycle;
wherein the external air flows through the evaporator;
the condenser adopts a shell-and-tube heat exchanger and comprises an inner tube for refrigerant to flow through and an outer tube sleeved on the inner tube, and the outer tube is communicated with the water inlet pipeline and the water outlet of the water tank.
6. The curing barn system according to claim 5, wherein each heat pump unit comprises a plurality of heat pump hot water production devices arranged in parallel.
7. The system according to claim 1, wherein a plurality of said baking chambers are arranged next to one another in a row; the water tank and the heat pump unit are arranged at the top of the curing barn.
8. The curing barn system combining the central heat pump unit and the distributed fan coil as claimed in claim 1, further comprising a control device connected to each of the first and second solenoid valves for controlling the on/off thereof.
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| CN202020143630.5U CN212481864U (en) | 2020-01-21 | 2020-01-21 | Central heat pump set and baking room system of distributing type fan coil combination |
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