CN114754517A - Residual cold recovery type radiation type cooling and heating heat pump system and control method thereof - Google Patents

Residual cold recovery type radiation type cooling and heating heat pump system and control method thereof Download PDF

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Publication number
CN114754517A
CN114754517A CN202110031471.9A CN202110031471A CN114754517A CN 114754517 A CN114754517 A CN 114754517A CN 202110031471 A CN202110031471 A CN 202110031471A CN 114754517 A CN114754517 A CN 114754517A
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fresh air
heat exchanger
heat
compressor
radiation
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王天舒
马晓洁
孙永剑
王颖
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Jiangsu Tianshu Electric Appliance Co Ltd
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Jiangsu Tianshu Electric Appliance Co Ltd
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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
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/153—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification with subsequent heating, i.e. with the air, given the required humidity in the central station, passing a heating element to achieve the required temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0089—Systems using radiation from walls or panels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion valves

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Thermal Sciences (AREA)
  • Central Air Conditioning (AREA)

Abstract

The invention provides a residual cold recovery type radiation type cooling and heating heat pump system and a control method thereof, wherein the residual cold recovery type radiation type cooling and heating heat pump system comprises a heat exchange device, a radiation heating device and a fresh air device, wherein the heat exchange device comprises a first compressor, a gas-liquid separator, a four-way valve, a first heat exchanger, a first expansion valve, a filter, a liquid storage device, a second heat exchanger and a third heat exchanger; the radiation heating device comprises a floor radiation plate, a ceiling radiation plate and a wall radiation plate, and the floor radiation plate, the ceiling radiation plate and the wall radiation plate are connected in parallel between the shell pass water inlet and the shell pass water outlet of the third heat exchanger; the fresh air device comprises a fresh air precooling device, a fresh air dehumidifying device, a fresh air reheating device, a wet film humidifying device and an air supply device, and an air outlet of the fresh air precooling device is sequentially connected with the fresh air dehumidifying device, the fresh air reheating device, the wet film humidifying device and the air supply device. The invention can realize the multifunctional cooling and heating of the unit and the requirement of room humidity by different control logic modes according to different temperature differences of application seasons and use places.

Description

Residual cold recovery type radiation type cooling and heating heat pump system and control method thereof
Technical Field
The invention relates to a cooling and heating system, in particular to a residual cooling recovery type radiation type cooling and heating heat pump system and a control method thereof.
Background
Along with the development of economic technology in China, the demand and the consumption of energy are gradually increased, researches find that the building field is one of important main bodies of energy consumption, in the building energy consumption, the proportion of a cooling and heating system and a domestic hot water system is close to 60%, along with the improvement of the living standard of people, the energy consumption of the building cooling and heating system is in a continuous rising trend, and the realization of high efficiency and energy conservation is particularly important.
Disclosure of Invention
The invention aims to solve the technical problem of providing a residual cold recovery type radiation type cooling and heating heat pump system and a control method thereof, wherein the residual cold recovery capacity utilization rate is high, and the radiation refrigeration and fresh air dehumidification combined operation effectively prevents the condensation problem of the radiation refrigeration.
In order to solve the technical problems, an embodiment of the invention provides a waste cold recovery type radiation type cold and heat supply heat pump system, which comprises a heat exchange device, a radiation heating device and a fresh air device, wherein the heat exchange device comprises a first compressor, a gas-liquid separator, a four-way valve, a first heat exchanger, a first expansion valve, a filter, a liquid storage device, a second heat exchanger and a third heat exchanger, a high-temperature refrigerant outlet of the first compressor is connected with a tube side inlet of the third heat exchanger through the four-way valve, a tube side outlet of the third heat exchanger is connected with an inlet of the liquid storage device, an outlet of the liquid storage device is connected with the first heat exchanger through the first expansion valve and the filter, and a low-temperature refrigerant outlet of the first heat exchanger is connected with a reflux port of the first compressor sequentially through the four-way valve and the gas-liquid separator; the second heat exchanger is connected in parallel to a pipeline between the third heat exchanger and the liquid storage device;
The radiation heating device comprises a floor radiation plate, a ceiling radiation plate and a wall radiation plate, wherein the floor radiation plate, the ceiling radiation plate and the wall radiation plate are connected in parallel between a shell pass water inlet and a shell pass water outlet of the third heat exchanger;
the fresh air device comprises a fresh air precooling device, a fresh air dehumidifying device, a fresh air reheating device, a wet film humidifying device and an air supply device, and an air outlet of the fresh air precooling device is sequentially connected with the fresh air dehumidifying device, the fresh air reheating device, the wet film humidifying device and the air supply device.
And the floor radiation plate, the ceiling radiation plate and the wall radiation plate are respectively connected with a shell pass water inlet and a shell pass water outlet of the third heat exchanger through respective water dividing and collecting devices.
Wherein, the water inlet and the water outlet of the second heat exchanger are respectively connected with a water supply device through a water supply pipe and a water return pipe.
The fresh air device further comprises a second compressor and a second expansion valve, and the second compressor, the fresh air reheating device, the second expansion valve and the fresh air dehumidifying device are connected in a circulating mode.
Preferably, the fresh air reheating device adopts a fin reheater, the fresh air dehumidifying device adopts a fin evaporator, the fresh air precooling device adopts a fin precooler, and the wet film humidifying device adopts a wet film humidifier.
Preferably, the first heat exchanger is a finned heat exchanger, the second heat exchanger is a double-pipe heat exchanger, and the third heat exchanger is a shell-and-tube heat exchanger.
The invention also provides a control method of the residual cold recovery type radiation type cooling and heating heat pump system, which comprises the following steps:
(1) outdoor ambient temperature T0<And (3) starting a winter floor radiation heating mode at 10 ℃:
(1-1) high-temperature refrigerant discharged by the first compressor enters a tube pass of a third heat exchanger through a four-way valve, exchanges heat with water to be cooled in a shell pass of the third heat exchanger to generate hot water at 35 ℃, and enters a floor radiation plate for heating through a pipeline;
(1-2) allowing the refrigerant in the tube pass of the third heat exchanger to flow through a liquid storage device, a first expansion valve for throttling and pressure reducing, filtering by a filter, then allowing the refrigerant to enter the first heat exchanger, exchanging heat by the first heat exchanger to form low-pressure and low-temperature refrigerant steam, and returning to the first compressor after flowing through a four-way valve and a gas-liquid separator;
(1-3) heating cyclically based on the steps (1-1) and (1-2);
(2) outdoor ambient temperature T0>And (3) starting the summer ceiling radiation and wall radiation refrigeration modes at 30 ℃:
(2-1) high-temperature refrigerant discharged by the first compressor enters a first heat exchanger through a four-way valve for heat exchange, is throttled and decompressed through a first expansion valve, then flows into a second heat exchanger through a filter and a liquid storage device for primary heat exchange, then enters a tube pass of a third heat exchanger, exchanges heat with water to be cooled in a shell pass of the third heat exchanger to generate 18 ℃ high-temperature cold water, and enters a ceiling radiation plate and a wall radiation plate through pipelines for cooling;
(2-2) the refrigerant in the tube pass of the third heat exchanger returns to the first compressor after flowing through the four-way valve and the gas-liquid separator;
(2-3) circulating refrigeration based on the steps (2-1) and (2-2);
(3) outdoor ambient temperature T0<At 30 ℃ and relative humidity>When 80%, open the new trend processing mode:
the fresh air precooled in the fresh air precooling device is dehumidified by the fresh air dehumidifying device, reheated by the fresh air reheating device and humidified by the wet film humidifying device in sequence, and then the fresh air is blown indoors by the air supply device.
Wherein, the step (2-1) comprises the following specific steps:
(2-1-1) outdoor ambient temperature T0>30 ℃ and relative humidity>When 60%, open summer furred ceiling radiation and wall body radiation refrigeration mode and new trend and handle the mode, including following step:
(2-1-1-1) residual cooling recovery process: high-temperature refrigerant steam discharged by the first compressor exchanges heat with the first heat exchanger through the four-way valve, is throttled and depressurized through the first expansion valve, then sequentially flows through the filter and the liquid accumulator, and then exchanges heat with the primary heat exchanger of the second heat exchanger to generate cold water for precooling fresh air in the fresh air precooling device;
(2-1-1-2) allowing the refrigerant flowing out of the second heat exchanger to enter a tube pass of a third heat exchanger, exchanging heat with water to be cooled in a shell pass of the third heat exchanger to generate high-temperature cold water at the temperature of 18 ℃, and allowing the cold water to enter a ceiling radiation plate and a wall radiation plate through pipelines for cooling;
(2-1-1-3) after the fresh air precooled in the fresh air precooling device is dehumidified by a fresh air dehumidifying device, reheated by a fresh air reheating device and humidified by a wet film humidifying device in sequence, blowing fresh air into a room by an air supply device;
(2-1-2) outdoor ambient temperature T0>30 ℃ relative humidity<When 40%, open summer furred ceiling radiation and wall body radiation refrigeration mode and new trend air conditioner refrigeration mode, including following step:
(2-1-2-1) high-temperature refrigerant steam discharged by the first compressor passes through the four-way valve to exchange heat with the first heat exchanger, is throttled and depressurized by the first expansion valve, then sequentially flows through the filter and the liquid storage device, exchanges heat with water to be cooled in the shell pass of the third heat exchanger to generate 18 ℃ high-temperature cold water, and enters the ceiling radiation plate and the wall radiation plate through pipelines for cooling;
(2-1-2-2) fresh air conditioning refrigeration: the fresh air precooled in the fresh air precooling device is dehumidified by a fresh air dehumidifying device, reheated by a fresh air reheating device and humidified by a wet film humidifying device in sequence, and then the fresh air is blown indoors by an air supply device;
the fresh air entering the fresh air dehumidifying device is subjected to refrigerant circulation refrigeration in advance: high-temperature refrigerant steam discharged by the second compressor flows through the second heat exchanger for heat exchange, is throttled and decompressed by the second expansion valve, exchanges heat in the fresh air dehumidifying device for fresh air, and then flows back to the second compressor, and the refrigerant is circulated for refrigeration.
Wherein, in step (3), the fresh air entering the fresh air dehumidifying device is subjected to refrigerant cycle refrigeration in advance: high-temperature refrigerant steam discharged by the second compressor flows through the second heat exchanger for heat exchange, is throttled and decompressed by the second expansion valve, exchanges heat in the fresh air dehumidifying device for fresh air, and then flows back to the second compressor, and the refrigerant is circulated for refrigeration.
The technical scheme of the invention has the following beneficial effects:
1. the invention can realize the multifunctional cooling and heating of the unit and the requirement of room humidity by changing different control logic modes according to different temperature differences of application seasons and use places.
2. The traditional cooling and heating system adopts cold water with the water temperature of 7 ℃ and hot water with the temperature of 50 ℃, and the residual cooling recovery type radiation type cooling and heating heat pump system provided by the invention has the advantages that the temperature of the cold water for cooling is high-temperature cold water with the temperature of 18 ℃, the temperature of the hot water for heating is low-temperature hot water with the temperature of 35 ℃, so that the energy consumption and the waste are greatly reduced, meanwhile, the radiation refrigeration has no blowing sense, and the living comfort requirement of people is met.
3. The invention innovatively provides an air source heat pump residual cold recovery method for processing fresh air humidity, and is provided with a whole set of fresh air processing mode for solving the problem of easy condensation.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is an enlarged view of the heat exchange unit of FIG. 1;
FIG. 3 is an enlarged view of the radiant heating apparatus of FIG. 1;
FIG. 4 is an enlarged view of the fresh air device of FIG. 1;
FIG. 5 is a control flow chart of a winter floor radiant heating mode according to the present invention;
FIG. 6 is a control flow chart of the combination of the dual cooling mode and the fresh air processing mode according to the present invention;
FIG. 7 is a control flow chart of the combination of the dual cooling mode and the fresh air conditioning mode according to the present invention;
FIG. 8 is a control flow chart of the fresh air handling mode according to the present invention.
Description of reference numerals:
1-1, a first compressor; 1-2, a gas-liquid separator; 1-3, a four-way valve; 1-4, a first heat exchanger; 1-5, a first expansion valve; 1-6, a filter; 1-7, a liquid reservoir; 1-8, a second heat exchanger; 1-9, a third heat exchanger; 1-10 parts of wall radiation plate; 1-11, ceiling radiant panels; 1-12, floor radiant panel;
2-1, a second compressor; 2-2, a second expansion valve; 2-3, a fresh air reheating device; 2-4, a fresh air dehumidifying device; 2-5, a fresh air precooling device; 2-6, a wet film humidifying device; 2-7, an air supply device;
1. a No. 1 electromagnetic valve; 2. no. 2 electromagnetic valve; 3. no. 3 electromagnetic valve; 4. no. 4 electromagnetic valve; 5. no. 5 electromagnetic valve; 6. no. 6 electromagnetic valve; 7. a No. 7 electromagnetic valve; 8. no. 8 electromagnetic valve; 9. solenoid valve No. 9; 10. solenoid valve No. 10; 11. solenoid valve No. 11; 12. a No. 12 electromagnetic valve; 13. no. 13 electromagnetic valve; 14. solenoid valve No. 14; 15. no. 15 electromagnetic valve; 16. a No. 16 electromagnetic valve; 17. solenoid valve No. 17; 18. solenoid valve number 18; 19. solenoid valve No. 19; 20. solenoid valve No. 20.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-4, the invention provides a waste cold recovery type radiation type cooling and heating heat pump system, which comprises a heat exchange device, a radiation heating device and a fresh air device, wherein the heat exchange device comprises a first compressor 1-1, a gas-liquid separator 1-2, a four-way valve 1-3, a first heat exchanger 1-4, a first expansion valve 1-5, a filter 1-6, a liquid reservoir 1-7, a second heat exchanger 1-8 and a third heat exchanger 1-9, preferably, the first heat exchanger 1-4 is a fin type heat exchanger, the second heat exchanger 1-8 is a double-pipe type heat exchanger, and the third heat exchanger 1-9 is a shell and tube type heat exchanger. A high-temperature refrigerant outlet of the first compressor 1-1 is connected with a tube side inlet of a third heat exchanger 1-9 through a four-way valve 1-3, a tube side outlet of the third heat exchanger 1-9 is connected with an inlet of a liquid storage device 1-7, an outlet of the liquid storage device 1-7 is connected with a first heat exchanger 1-4 through a first expansion valve 1-5 and a filter 1-6, the front side and the rear side of the first expansion valve 1-5 are respectively provided with the filter 1-6, and a low-temperature refrigerant outlet of the first heat exchanger 1-4 is connected with a return port of the first compressor 1-1 sequentially through the four-way valve 1-3 and a gas-liquid separator 1-2; the second heat exchanger 1-8 is connected in parallel on a pipeline between the third heat exchanger 1-9 and the liquid storage device 1-7. And the water inlets and the water outlets of the second heat exchangers 1 to 8 are respectively connected with a water supply device through a water supply pipe and a water return pipe.
The radiation heating device comprises floor radiation plates 1-12, ceiling radiation plates 1-11 and wall radiation plates 1-10, wherein the floor radiation plates 1-12, the ceiling radiation plates 1-11 and the wall radiation plates 1-10 are connected in parallel between a shell pass water inlet and a shell pass water outlet of the third heat exchanger 1-9. The floor radiation plates 1-12, the ceiling radiation plates 1-11 and the wall radiation plates 1-10 are respectively connected with the shell pass water inlet and the shell pass water outlet of the third heat exchanger 1-9 through respective water dividing and collecting devices.
The fresh air device comprises a fresh air precooling device 2-5, a fresh air dehumidifying device 2-4, a fresh air reheating device 2-3, a wet film humidifying device 2-6 and an air supply device 2-7, and an air outlet of the fresh air precooling device 2-5 is sequentially connected with the fresh air dehumidifying device 2-4, the fresh air reheating device 2-3, the wet film humidifying device 2-6 and the air supply device 2-7.
The fresh air device also comprises a second compressor 2-1 and a second expansion valve 2-2, wherein the second compressor 2-1, the fresh air reheating device 2-3, the second expansion valve 2-2 and the fresh air dehumidifying device 2-4 are in circulating connection.
Preferably, the fresh air reheating device 2-3 is a fin reheater, the fresh air dehumidifying device 2-4 is a fin evaporator, the fresh air precooling device 2-5 is a fin precooler, and the wet film humidifying device 2-6 is a wet film humidifier.
In the invention, a pipeline between a third heat exchanger 1-9 and a liquid storage device 1-7 is provided with a No. 20 electromagnetic valve 20, a pipeline between the front side of the No. 20 electromagnetic valve 20 and a second heat exchanger 1-8 is provided with a No. 2 electromagnetic valve 2, and a pipeline between the rear side of the No. 20 electromagnetic valve 20 and the second heat exchanger 1-8 is provided with a No. 1 electromagnetic valve 1.
A pipeline between the outlet of the second heat exchanger 1-8 and the inlet of the fresh air precooling device 2-5 is provided with a No. 3 electromagnetic valve 3, and a pipeline between the outlet of the fresh air precooling device 2-5 and the inlet of the second heat exchanger 1-8 is provided with a No. 4 electromagnetic valve 4. And a No. 18 electromagnetic valve 18 is arranged on a water return pipe of the second heat exchanger 1-8, and a No. 19 electromagnetic valve 19 is arranged on a water supply pipe.
A No. 6 electromagnetic valve 6 is arranged on a pipeline between the outlet of the second compressor 2-1 and the inlet of the fresh air reheating device 2-3, and a No. 5 electromagnetic valve 5 is arranged on a pipeline between the front side of the No. 6 electromagnetic valve 6 and the inlet of the second heat exchanger 1-8. A pipeline between the outlet of the fresh air reheating device 2-3 and the inlet of the fresh air dehumidifying device 2-4 is provided with a No. 8 electromagnetic valve 8, and a pipeline between the front side of the No. 8 electromagnetic valve 8 and the outlet of the second heat exchanger 1-8 is provided with a No. 7 electromagnetic valve 7.
And a No. 9 electromagnetic valve 9 is arranged on a water supply pipe of the wet film humidifying device 2-6.
And a water outlet pipe of the third heat exchanger 1-9 is provided with a No. 10 electromagnetic valve 10, and a water return pipe is provided with a No. 11 electromagnetic valve 11. No. 13 electromagnetic valves 13 are arranged on pipelines between the front sides of the No. 10 electromagnetic valves 10 and the water inlets of the wall radiation plates 1-10, and No. 12 electromagnetic valves 12 are arranged on pipelines between the water outlets of the wall radiation plates 1-10 and the front sides of the No. 11 electromagnetic valves 11. No. 15 electromagnetic valves 15 are arranged on pipelines between the front sides of the No. 10 electromagnetic valves 10 and the water inlets of the suspended ceiling radiation plates 1-11, and No. 14 electromagnetic valves 14 are arranged on pipelines between the water outlets of the suspended ceiling radiation plates 1-11 and the front sides of the No. 11 electromagnetic valves 11. A17 # electromagnetic valve 17 is arranged on a pipeline between the front side of the 10 # electromagnetic valve 10 and the water inlet of the floor radiation plate 1-12, and a 16 # electromagnetic valve 16 is arranged on a pipeline between the water outlet of the floor radiation plate 1-12 and the front side of the 11 # electromagnetic valve 11.
The invention also provides a control method of the residual cold recovery type radiation type cooling and heating heat pump system, which comprises the following steps:
(1) outdoor ambient temperature T0<When 10 ℃, the winter floor radiant heating mode is started through a set program, the heating device is suitable for newly-built heating places with better heat preservation performance, and needs to be used for floor radiant heating, and the requirement of water temperature is about 35 ℃:
(1-1) high-temperature refrigerant discharged by a first compressor 1-1 enters a tube side of a third heat exchanger 1-9 through a four-way valve 1-3, exchanges heat with water to be cooled in a shell side of the third heat exchanger 1-9 to generate hot water at 35 ℃, and enters a floor radiation plate 1-12 for heating through a pipeline;
(1-2) the refrigerant in the tube pass of the third heat exchanger 1-9 flows through a liquid storage device 1-7, a first expansion valve 1-5 for throttling and pressure reduction, a filter 1-6 for filtration and then enters a first heat exchanger 1-4, the refrigerant is subjected to heat exchange by the first heat exchanger 1-4 to form low-pressure and low-temperature refrigerant steam, and the low-pressure and low-temperature refrigerant steam flows through a four-way valve 1-3 and a gas-liquid separator 1-2 and then returns to a first compressor 1-1;
(1-3) heating by circulation based on the steps (1-1) and (1-2).
Fig. 5 shows a flowchart of the control process, in which the solenoid valves 20, 11, 10, 16, and 17 of the 20 th, 11 th, 10 th, 16 th, and 17 th solenoid valves are opened and the rest are closed.
(2) Outdoor ambient temperature T0>And (3) starting the summer ceiling radiation and wall radiation refrigeration modes at 30 ℃:
(2-1) high-temperature refrigerant discharged by a first compressor 1-1 enters a first heat exchanger 1-4 through a four-way valve 1-3 to exchange heat, is throttled and decompressed by a first expansion valve 1-5, then flows into a second heat exchanger 1-8 through a filter 1-6 and a liquid reservoir 1-7 to perform primary heat exchange, then enters a tube pass of a third heat exchanger 1-9 to generate 18 ℃ high-temperature cold water after exchanging heat with water to be cooled in a shell pass of the third heat exchanger 1-9, and then enters a ceiling radiation plate 1-11 and a wall radiation plate 1-10 through a pipeline to supply cold; the method comprises the following specific steps:
(2-1-1) outdoor ambient temperature T0>30 ℃ and relative humidity>And when 60%, starting a summer ceiling radiation and wall radiation refrigeration mode and a fresh air treatment mode, wherein the water temperature is required to be about 18 ℃. In the seasons with relatively high humidity in summer, in order to prevent condensation phenomena of ceiling radiation and wall radiation refrigeration, a combined operation mode of precooling treatment and fresh air dehumidification mode is carried out by using residual cold as fresh air; the operation mode is energy-saving and environment-friendly, has high comfort level, more importantly solves the problem of easy condensation of radiation type refrigeration, and provides favorable conditions for large-scale development of radiation type refrigeration. The method comprises the following steps:
(2-1-1-1) residual cooling recovery process: high-temperature refrigerant steam discharged by a first compressor 1-1 exchanges heat with a first heat exchanger 1-4 through a four-way valve 1-3, is throttled and depressurized through a first expansion valve 1-5, sequentially flows through a filter 1-6 and a liquid accumulator 1-7, and then is primarily exchanged heat with a second heat exchanger 1-8 to generate cold water for precooling fresh air in a fresh air precooling device 2-5;
(2-1-1-2) the refrigerant flowing out of the second heat exchanger 1-8 enters the tube side of the third heat exchanger 1-9, exchanges heat with the water to be cooled in the shell side of the third heat exchanger 1-9 to generate high-temperature cold water at 18 ℃, and enters the ceiling radiation plates 1-11 and the wall radiation plates 1-10 through pipelines for cooling;
(2-1-1-3) dehumidifying the fresh air precooled in the fresh air precooling device 2-5 by a fresh air dehumidifying device 2-4, reheating by a fresh air reheating device 2-3 and humidifying by a wet film humidifying device 2-6 in sequence, and blowing the fresh air to the room by an air supply device 2-7; the step also comprises a refrigerant circulating process provided by a refrigerant circulating device, wherein the refrigerant circulating device is formed by circularly connecting a fresh air dehumidifying device 2-4, a second compressor 2-1, a fresh air reheating device 2-3 and a second expansion valve 2-2.
The flow chart of the control process is shown in fig. 6, in the cooling process, the solenoid valves 20, 5, 7, 16 and 17 are closed, and the rest are all opened.
(2-1-2) outdoor ambient temperature T0>30 ℃ relative humidity<When 40%, open summer furred ceiling radiation and wall body radiation refrigeration mode and new trend air conditioner refrigeration mode, two kinds of cold sources refrigerate simultaneously, include following step:
(2-1-2-1) high-temperature refrigerant steam discharged by a first compressor 1-1 exchanges heat with a first heat exchanger 1-4 through a four-way valve 1-3, is throttled and depressurized through a first expansion valve 1-5, then sequentially flows through a filter 1-6 and a liquid storage device 1-7, exchanges heat with water to be cooled in a shell pass of a third heat exchanger 1-9 to generate 18 ℃ high-temperature cold water, and enters a ceiling radiation plate 1-11 and a wall radiation plate 1-10 through pipelines for cooling;
(2-1-2-2) fresh air conditioning refrigeration: the fresh air precooled in the fresh air precooling device 2-5 is dehumidified by a fresh air dehumidifying device 2-4, reheated by a fresh air reheating device 2-3 and humidified by a wet film humidifying device 2-6 in sequence, and then the fresh air is blown to the room by an air supply device 2-7;
the fresh air entering the fresh air dehumidifying device 2-4 is subjected to refrigerant cycle refrigeration in advance: high-temperature refrigerant steam discharged by the second compressor 2-1 flows through the second heat exchanger 1-8 for heat exchange, is throttled and depressurized by the second expansion valve 2-2, exchanges heat in the fresh air dehumidifying device 2-4 for fresh air, and then flows back to the second compressor 2-1, and the refrigerant is circulated for refrigeration.
(2-2) the refrigerant in the tube pass of the third heat exchanger 1-9 returns to the first compressor 1-1 after flowing through the four-way valve 1-3 and the gas-liquid separator 1-2;
(2-3) circulating refrigeration based on the steps (2-1) and (2-2);
the flow chart of the control process is shown in fig. 7, in the cooling process, the solenoid valves 1, 2, 3, 4, 6, 8, 16, 17 are closed, and the rest are opened.
(3) Outdoor ambient temperature T0<Relative humidity at 30 ℃>When 80%, open the new trend processing mode:
the fresh air precooled in the fresh air precooling device 2-5 is dehumidified by the fresh air dehumidifying device 2-4, reheated by the fresh air reheating device 2-3 and humidified by the wet film humidifying device 2-6 in sequence, and then the fresh air is blown indoors by the air supply device 2-7. In this step, the fresh air entering the fresh air dehumidifying device 2-4 is subjected to refrigerant cycle refrigeration in advance: high-temperature refrigerant steam discharged by the second compressor 2-1 flows through the second heat exchanger 1-8 for heat exchange, is throttled and depressurized by the second expansion valve 2-2, exchanges heat in the fresh air dehumidifying device 2-4 for fresh air, and then flows back to the second compressor 2-1, and the refrigerant is circulated for refrigeration.
The flow chart of the control process is shown in fig. 8, in the cooling process, the solenoid valves 6 and 8 6 are opened, and the rest are closed.
While the foregoing is directed to the preferred embodiment of the present invention, it will be appreciated by those skilled in the art that various changes and modifications may be made therein without departing from the principles of the invention as set forth in the appended claims.

Claims (9)

1. A waste cold recovery type radiation type cold and heat supply heat pump system is characterized by comprising a heat exchange device, a radiation heating device and a fresh air device, wherein the heat exchange device comprises a first compressor (1-1), a gas-liquid separator (1-2), a four-way valve (1-3), a first heat exchanger (1-4), a first expansion valve (1-5), a filter (1-6), a liquid storage device (1-7), a second heat exchanger (1-8) and a third heat exchanger (1-9), a high-temperature refrigerant outlet of the first compressor (1-1) is connected with a tube pass inlet of the third heat exchanger (1-9) through the four-way valve (1-3), a tube pass outlet of the third heat exchanger (1-9) is connected with an inlet of the liquid storage device (1-7), and an outlet of the liquid storage device (1-7) is connected with the first expansion valve (1-5) and the filter (1-6) is connected with a first heat exchanger (1-4), and a low-temperature refrigerant outlet of the first heat exchanger (1-4) is connected with a reflux port of a first compressor (1-1) through a four-way valve (1-3) and a gas-liquid separator (1-2) in sequence; the second heat exchanger (1-8) is connected in parallel to a pipeline between the third heat exchanger (1-9) and the liquid storage device (1-7);
The radiant heating device comprises floor radiant panels (1-12), ceiling radiant panels (1-11) and wall radiant panels (1-10), wherein the floor radiant panels (1-12), the ceiling radiant panels (1-11) and the wall radiant panels (1-10) are connected in parallel between a shell pass water inlet and a shell pass water outlet of the third heat exchanger (1-9);
the fresh air device comprises a fresh air precooling device (2-5), a fresh air dehumidifying device (2-4), a fresh air reheating device (2-3), a wet film humidifying device (2-6) and an air supply device (2-7), wherein an air outlet of the fresh air precooling device (2-5) is sequentially connected with the fresh air dehumidifying device (2-4), the fresh air reheating device (2-3), the wet film humidifying device (2-6) and the air supply device (2-7).
2. The residual cold recovery type radiant cooling and heating heat pump system as claimed in claim 1, wherein the floor radiant panels (1-12), the ceiling radiant panels (1-11) and the wall radiant panels (1-10) are respectively connected with the shell pass water inlet and outlet of the third heat exchanger (1-9) through respective water collecting and distributing devices.
3. The residual cooling recovery type radiant cooling and heating heat pump system as claimed in claim 1, wherein the water inlet and outlet of the second heat exchanger (1-8) are connected to a water supply device through a water supply pipe and a water return pipe, respectively.
4. The residual cold recovery type radiant cooling and heating heat pump system according to claim 1, wherein the fresh air device further comprises a second compressor (2-1) and a second expansion valve (2-2), and the second compressor (2-1), the fresh air reheating device (2-3), the second expansion valve (2-2) and the fresh air dehumidifying device (2-4) are in circulating connection.
5. The residual cold recovery type radiant cooling and heating heat pump system as claimed in claim 1, wherein a fin reheater is selected as the fresh air reheating device (2-3), a fin evaporator is selected as the fresh air dehumidifying device (2-4), a fin precooler is selected as the fresh air precooling device (2-5), and a wet film humidifier is selected as the wet film humidifying device (2-6).
6. The residual-cold-recovery type radiant cooling and heating heat pump system according to claim 1, wherein the first heat exchanger (1-4) is a fin-type heat exchanger, the second heat exchanger (1-8) is a double-pipe heat exchanger, and the third heat exchanger (1-9) is a shell-and-tube heat exchanger.
7. A control method of a residual heat recovery type radiant cooling and heating heat pump system as claimed in any one of claims 1 to 6, comprising the steps of:
(1) outdoor ambient temperature T0<And (3) starting a winter floor radiation heating mode at 10 ℃:
(1-1) high-temperature refrigerant discharged by a first compressor (1-1) enters a tube side of a third heat exchanger (1-9) through a four-way valve (1-3), exchanges heat with water to be cooled in a shell side of the third heat exchanger (1-9) to generate hot water at 35 ℃, and enters a floor radiation plate (1-12) through a pipeline for heating;
(1-2) refrigerant in the tube pass of the third heat exchanger (1-9) flows through a liquid storage device (1-7), a first expansion valve (1-5) for throttling and pressure reduction, and a filter (1-6) for filtering, then enters a first heat exchanger (1-4), is subjected to heat exchange by the first heat exchanger (1-4) to form low-pressure low-temperature refrigerant steam, and returns to a first compressor (1-1) after flowing through a four-way valve (1-3) and a gas-liquid separator (1-2);
(1-3) heating circularly based on the steps (1-1) and (1-2);
(2) outdoor ambient temperature T0>And (3) starting summer ceiling radiation and wall radiation refrigeration modes at 30 ℃:
(2-1) high-temperature refrigerant discharged by a first compressor (1-1) enters a first heat exchanger (1-4) through a four-way valve (1-3) for heat exchange, is throttled and decompressed through a first expansion valve (1-5), then flows into a second heat exchanger (1-8) through a filter (1-6) and a liquid storage device (1-7) for primary heat exchange, then enters a tube pass of a third heat exchanger (1-9), exchanges heat with water to be cooled in a shell pass of the third heat exchanger (1-9) to generate 18 ℃ high-temperature cold water, and enters a ceiling radiation plate (1-11) and a wall radiation plate (1-10) through pipelines for cooling;
(2-2) the refrigerant in the tube pass of the third heat exchanger (1-9) returns to the first compressor (1-1) after flowing through the four-way valve (1-3) and the gas-liquid separator (1-2);
(2-3) circulating refrigeration based on the steps (2-1) and (2-2);
(3) Outdoor ambient temperature T0<At 30 ℃ and relative humidity>When 80%, open the new trend mode of handling:
the fresh air precooled in the fresh air precooling device (2-5) is dehumidified by the fresh air dehumidifying device (2-4), reheated by the fresh air reheating device (2-3) and humidified by the wet film humidifying device (2-6) in sequence, and then the fresh air is blown indoors by the air supply device (2-7).
8. The control method of the residual cooling recovery type radiant cooling and heating heat pump system according to claim 7, wherein the step (2-1) comprises the following specific steps:
(2-1-1) outdoor ambient temperature T0>30 ℃ and relative humidity>When 60%, open summer furred ceiling radiation and wall body radiation refrigeration mode and new trend and handle the mode, including following step:
(2-1-1-1) residual cooling recovery process: high-temperature refrigerant steam discharged by a first compressor (1-1) exchanges heat with a first heat exchanger (1-4) through a four-way valve (1-3), is throttled and depressurized through a first expansion valve (1-5), sequentially flows through a filter (1-6) and a liquid storage device (1-7), and then is primarily exchanged heat with a second heat exchanger (1-8) to generate cold water for precooling fresh air in a fresh air precooling device (2-5);
(2-1-1-2) refrigerant flowing out of the second heat exchanger (1-8) enters a tube pass of a third heat exchanger (1-9), exchanges heat with water to be cooled in a shell pass of the third heat exchanger (1-9) to generate high-temperature cold water at 18 ℃, and enters a ceiling radiation plate (1-11) and a wall radiation plate (1-10) through pipelines for cooling;
(2-1-1-3) after the fresh air precooled in the fresh air precooling device (2-5) is dehumidified by the fresh air dehumidifying device (2-4), reheated by the fresh air reheating device (2-3) and humidified by the wet film humidifying device (2-6), the fresh air is blown indoors by the air supply device (2-7);
(2-1-2) outdoor ambient temperature T0>30 ℃ relative humidity<When 40%, open summer furred ceiling radiation and wall body radiation refrigeration mode and new trend air conditioner refrigeration mode, including following step:
(2-1-2-1) high-temperature refrigerant steam discharged by a first compressor (1-1) exchanges heat with a first heat exchanger (1-4) through a four-way valve (1-3), is throttled and depressurized through a first expansion valve (1-5) and then sequentially flows through a filter (1-6) and a liquid storage device (1-7), exchanges heat with water to be cooled in a shell pass of a third heat exchanger (1-9) to generate 18 ℃ high-temperature cold water, and enters a ceiling radiation plate (1-11) and a wall radiation plate (1-10) through pipelines for cooling;
(2-1-2-2) fresh air conditioning refrigeration: fresh air precooled in the fresh air precooling device (2-5) is dehumidified by the fresh air dehumidifying device (2-4), reheated by the fresh air reheating device (2-3) and humidified by the wet film humidifying device (2-6) in sequence, and then fresh air is blown indoors by the air supply device (2-7);
the fresh air entering the fresh air dehumidifying device (2-4) is subjected to refrigerant cycle refrigeration in advance: high-temperature refrigerant steam discharged by the second compressor (2-1) flows through the second heat exchanger (1-8) for heat exchange, is throttled and depressurized by the second expansion valve (2-2), then exchanges heat in the fresh air dehumidifying device (2-4) for fresh air, and then flows back to the second compressor (2-1), and the refrigerant is circulated for refrigeration.
9. The control method of the residual-cold-recovery type radiant cooling and heating heat pump system as claimed in claim 7, wherein in the step (3), the fresh air entering the fresh air dehumidifying devices (2 to 4) is subjected to refrigerant cycle refrigeration in advance: high-temperature refrigerant steam discharged by the second compressor (2-1) flows through the second heat exchanger (1-8) for heat exchange, is throttled and depressurized by the second expansion valve (2-2), then exchanges heat in the fresh air dehumidifying device (2-4) for fresh air, and then flows back to the second compressor (2-1), and the refrigerant is circulated for refrigeration.
CN202110031471.9A 2021-01-11 2021-01-11 Residual cold recovery type radiation type cooling and heating heat pump system and control method thereof Pending CN114754517A (en)

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CN202110031471.9A CN114754517A (en) 2021-01-11 2021-01-11 Residual cold recovery type radiation type cooling and heating heat pump system and control method thereof

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