Efficient multifunctional CO2 transcritical all-season injection cold and heat coupling system

Abstract

The invention discloses an efficient and multifunctional CO2 transcritical all-season injection cold and heat coupling system, and relates to the technical field of industrial refrigeration and commercial air conditioners, in particular to the efficient and multifunctional CO2 transcritical all-season injection cold and heat coupling system. The CO2 refrigerating system provides a wide temperature band gradient energy solution of-45 DEG C to + 95 DEG C, and the functions of cold for production, hot water production, domestic hot water and high-temperature hot water are met; the cold storage for production comprises quick freezing, freezing, cold storage and processing; the produced hot water comprises terrace anti-freezing and defrosting hot water; the domestic hot water comprises air conditioning and heating; the high-temperature hot water comprises CIP cleaning and cooking sterilization. According to the technical scheme, the problems that in the prior art, a traditional logistics park is provided with a refrigerating system, an air conditioning system, municipal administration or a boiler and the like according to the cold and hot requirements of the production technology, the energy utilization rate is low, the initial investment is large, and popularization of the green low-carbon technology in the refrigerating and air conditioning industry is not met are solved.

Description

Technical Field

[0001] The invention discloses a highly efficient and multifunctional CO2 transcritical all-season induced cooling and heating coupling system, which relates to the technical fields of industrial refrigeration and commercial air conditioning, and in particular to a highly efficient and multifunctional CO2 transcritical all-season induced cooling and heating coupling system. Background Art

[0002] As of 2021, fossil energy still accounts for 84% of my country's total energy consumption, and the increase in carbon emissions has accelerated the global greenhouse effect. Traditional logistics parks have set up refrigeration systems, air-conditioning systems, municipal or boilers, etc. according to the heating and cooling requirements of production processes. They have low energy utilization rates, large initial investments, and are not in line with the promotion of green and low-carbon technologies in the refrigeration and air-conditioning industry.

[0003] With the global greenhouse effect and the improvement of human environmental awareness, the advantages of CO2 as a natural refrigerant are highlighted. Its ODP=0, GWP=1, it is safe, non-toxic and non-flammable, its unit cooling capacity is 5 to 8 times that of conventional refrigerants, its low viscosity fluid has small flow resistance, and its natural refrigerant is low in price.

[0004] In view of the problems existing in the above-mentioned prior art, it is very necessary to study and design a new type of efficient and multifunctional CO2 transcritical all-season injection hot and cold coupling system to overcome the problems existing in the prior art. Summary of the invention

[0005] According to the above-mentioned prior art, the traditional logistics park sets up refrigeration system, air-conditioning system, municipal or boiler system respectively according to the heating and cooling requirements of the production process, which has low energy utilization rate, large initial investment, and does not conform to the promotion of green and low-carbon technology in the refrigeration and air-conditioning industry. Instead, a high-efficiency and multifunctional CO2 transcritical all-season induced heating and cooling coupling system is provided.

[0006] The technical means adopted by the present invention are as follows:

[0007] An efficient and multifunctional CO2 transcritical all-season induced cold and heat coupling system provides a wide temperature gradient energy solution of -45℃-+95℃ through a CO2 refrigeration system, meeting the functions of production cold, production hot water, domestic hot water, and high-temperature hot water;

[0008] Furthermore, production refrigeration includes: quick freezing, freezing, refrigeration and processing rooms;

[0009] Furthermore, the hot water produced includes: floor antifreeze and defrost hot water;

[0010] Further, domestic hot water includes: air conditioning and heating;

[0011] Furthermore, high temperature hot water includes: CIP cleaning and steam sterilization.

[0012] Further, the production cold includes: parallel compressor, parallel compressor / heat pump compressor, oil separator, first three-way solenoid valve, second three-way solenoid valve, air cooler, air cooler / heat pump evaporator, first electric valve, first pump, low temperature regenerator, low temperature compressor, floor heating heat exchanger, desuperheater, ejector, solenoid valve, first stop valve, second stop valve, heat exchanger, third electric valve, medium temperature regenerator, high temperature evaporator, low temperature evaporator, fourth electric valve, fifth electric valve, processing room evaporator, sixth electric valve, flash tank, third three-way solenoid valve, seventh electric valve, quick freezing evaporator, quick freezing regenerator and quick freezing compressor;

[0013] Further, the exhaust gas of the parallel compressor and the parallel compressor / heat pump compressor is connected to the inlet of the oil separator through the first pipeline;

[0014] Further, the output end of the oil separator is connected to the first three-way solenoid valve, the second three-way solenoid valve and the third three-way solenoid valve in sequence through the second pipeline;

[0015] Furthermore, the input ends of the air cooler and the air cooler / heat pump evaporator are connected to the second pipe for cooling the high-temperature and high-pressure gas, and the output ends of the two are connected to the inlet of the hot side of the medium-temperature regenerator through a third pipe;

[0016] Further, the first electric valve is used as a backup high-pressure throttle valve, with its input end connected to the outlet of the hot side of the medium-temperature regenerator and its output end connected to the flash tank;

[0017] Further, the solenoid valve includes: a first solenoid valve, a second solenoid valve and a third solenoid valve; the input ends of the first solenoid valve, the second solenoid valve and the third solenoid valve are connected to the hot side outlet of the medium temperature regenerator through the fifteenth pipeline, the sixteenth pipeline and the seventeenth pipeline respectively;

[0018] Further, the ejector includes: a first ejector, a second ejector and a third ejector; the input ports A of the first ejector, the second ejector and the third ejector are respectively connected to the output ports of the first solenoid valve, the second solenoid valve and the third solenoid valve through pipelines, the input ports B are respectively connected to the ninth pipeline of the medium-temperature suction through the twelfth pipeline, the thirteenth pipeline and the fourteenth pipeline, and the output ports C are respectively connected to the inlet of the flash tank through the pipeline;

[0019] Further, the outlet of the flash tank is connected to a fifth pipeline;

[0020] Furthermore, the first pump is a booster pump connected in parallel with the fifth pipeline, and the first pump can be automatically started and stopped to improve the energy efficiency of the system at low ambient temperature;

[0021] Further, the hot side input end of the low temperature regenerator is connected to the fifth pipeline through the sixth pipeline, and the hot side output end is connected to the quick freezing regenerator, the thirty-fourth pipeline, the input end of the third electric valve, the input end of the fourth electric valve, the input end of the fifth electric valve and the input end of the seventh electric valve in sequence through the seventh pipeline;

[0022] Further, the output ends of the third electric valve, the fourth electric valve, the fifth electric valve and the seventh electric valve are respectively connected to the inlet of the hot side of the processing room heat exchanger, the inlet of the high-temperature evaporator, the inlet of the low-temperature evaporator and the inlet of the quick-freezing evaporator;

[0023] Further, the hot side outlet of the process room heat exchanger is connected to the ninth pipeline;

[0024] Furthermore, the processing room evaporator is connected to the cold side of the processing room heat exchanger through the sixth electric valve and the thirty-first pipeline, and its function is to prepare a -3°C supply / 2°C return ethylene glycol solution to maintain the processing room temperature at 8-15°C;

[0025] Furthermore, the outlet of the high-temperature evaporator is connected to the ninth pipeline, which is used to maintain the high-temperature refrigeration temperature at 0-4°C;

[0026] Furthermore, the outlet of the low-temperature evaporator is connected to an eighth pipe, which is used to maintain the low-temperature refrigeration temperature at -20 to -25°C;

[0027] Furthermore, the outlet of the quick-freezing evaporator is connected to the thirty-fifth pipeline, which is used to maintain the temperature of the quick-freezing store at -35°C;

[0028] Furthermore, the cold side input end of the medium temperature regenerator is connected to the ninth pipeline through the tenth pipeline and the second stop valve, and the cold side output end thereof is connected to the suction port of the parallel compressor and the parallel compressor / heat pump compressor through the eleventh pipeline, and its function is to increase the superheat of the medium temperature suction air;

[0029] Furthermore, the cold side input end of the low temperature regenerator is connected to the eighth pipeline, and the cold side output end thereof is connected to the suction port of the low temperature compressor, which functions to increase the superheat of the low temperature suction air;

[0030] Furthermore, the cold side input end of the quick freezing regenerator is connected to the thirty-fifth pipeline, and the cold side output end thereof is connected to the air intake port of the quick freezing compressor, and its function is to increase the superheat of the quick freezing air intake;

[0031] Furthermore, the low-temperature compressor and the quick-freezing compressor compress the low-temperature and low-pressure gas, and their outlets are connected to the 20th pipeline, the hot side interface of the floor heating heat exchanger, and the 21st pipeline in sequence;

[0032] Further, a desuperheater, whose input end is connected to the twenty-first pipeline to reduce the superheat of the exhaust gas, and whose output end is connected to the ninth pipeline through the twenty-second pipeline;

[0033] Furthermore, the flash gas in the flash tank is connected to the tenth pipeline through the first stop valve and discharged.

[0034] Furthermore, production cold can be ejected throughout the season, and multiple ejectors can automatically start and stop and adjust the opening according to the season and system pressure.

[0035] Furthermore, the air cooler integrates a high-pressure heat exchanger, a fan, a wet curtain, a spray pump, and a temperature sensor, and automatically switches between dry and wet modes according to the ambient temperature and the air cooler outlet temperature collected by the temperature sensor.

[0036] Furthermore, the air cooler / heat pump evaporator integration can increase the ambient temperature of the heat pump evaporator and thus improve the energy efficiency of the heat pump and the condensing efficiency of the air cooler.

[0037] Furthermore, the production cold contains a medium-temperature heat regenerator, a low-temperature heat regenerator, and a quick-freezing heat regenerator to increase the suction superheat.

[0038] Furthermore, the production of hot water includes: floor antifreeze heating and air cooler defrosting hot water;

[0039] Further, the floor antifreeze heating includes: a floor heating heat exchanger, a floor heating pipe and a fifth pump;

[0040] Furthermore, the hot side inlet and outlet of the floor heating heat exchanger are connected to the 20th pipeline and the 21st pipeline respectively, the cold side inlet is connected to the fifth pump and the 30th pipeline in sequence, and the cold side outlet is connected to the 29th pipeline and the inlet section of the floor heating pipe in sequence;

[0041] Furthermore, the supply and return water temperature of the floor heating pipe is 10°C supply / 5°C return of ethylene glycol solution, which is used to prevent freezing of the cold storage floor; the outlet end of the floor heating pipe is connected to the 30th pipeline.

[0042] Furthermore, the hot water for defrosting the air cooler is also used for cleaning the floor of the production workshop, including: an energy storage tank, a third three-way solenoid valve, a defrosting heat exchanger and a sixth pump;

[0043] Further, the A port of the third three-way solenoid valve is connected to the second pipeline, the B port is connected to the hot side inlet of the defrost heat exchanger, and the C port is connected to the outlet of the high-temperature and high-pressure oil separator;

[0044] Further, the hot side output end of the defrost heat exchanger is connected to the second pipeline;

[0045] Furthermore, the cold side input end of the defrost heat exchanger is connected to the sixth pump, the thirty-third pipeline and the energy storage water tank in sequence, and the output end is connected to the thirty-second pipeline and the energy storage water tank.

[0046] Furthermore, when the domestic hot water in the energy storage tank reaches 20-25°C, the hot air enters port A from port C of the third three-way solenoid valve and dissipates heat in the air cooler without passing through the defrost heat exchanger;

[0047] Furthermore, when the domestic hot water in the energy storage tank is lower than 20-25°C, the hot air enters port C and exits port B of the third three-way solenoid valve, and after heat exchange in the defrost heat exchanger, it is dissipated in the air cooler.

[0048] Further, domestic hot water includes: air conditioning and heating;

[0049] Further, the air conditioner stores energy for summer air conditioning, including: a summer energy storage heat exchanger, an energy storage water tank, a flash tank and a second pump;

[0050] Furthermore, the flash tank is a cold source for air conditioning energy storage, and is connected to the cold measuring inlet and outlet of the summer cold storage heat exchanger through the eighteenth pipeline and the nineteenth pipeline respectively;

[0051] Furthermore, in summer, the hot side input end of the energy storage heat exchanger is connected to the second pump and the energy storage water tank in sequence through the twenty-eighth pipeline, and the output end is connected to the energy storage water tank through the twenty-seventh pipeline, so as to realize 7 / 12℃ air-conditioning water energy storage.

[0052] Further, the heating is heating / domestic hot water heat storage, including: a second three-way solenoid valve, a domestic hot water heat exchanger, an energy storage tank and a fourth pump;

[0053] Further, the port A of the second three-way solenoid valve is connected to the outlet of the high-temperature and high-pressure oil separator, the port B is connected to the second pipeline, and the port C is connected to the hot side inlet of the domestic hot water heat exchanger;

[0054] Furthermore, the hot side output end of the domestic hot water heat exchanger is connected to the second pipeline, the cold side input end is connected to the fourth pump, the twenty-fourth pipeline and the energy storage tank in sequence, and the output end is connected to the energy storage tank through the twenty-third pipeline.

[0055] Furthermore, when the domestic hot water in the energy storage tank reaches 45-60°C, the hot air enters port A and exits port B from the second three-way solenoid valve, and does not pass through the domestic hot water heat exchanger to the air cooler for heat dissipation;

[0056] Furthermore, when the domestic hot water in the energy storage tank is lower than 45-60°C, the hot air enters port C from port A of the second three-way solenoid valve, and after heat exchange in the domestic hot water heat exchanger, it is dissipated in the air cooler.

[0057] Further, the high-temperature hot water is used for CIP cleaning and boiling, and includes: a parallel compressor / also serving as a heat pump compressor, a first three-way solenoid valve, a second three-way solenoid valve, a high-temperature hot water heat exchanger, an air cooler / heat pump evaporator, a second electric valve, a fourth solenoid valve, an energy storage tank, a flash tank and a third pump;

[0058] Further, the liquid outlet of the flash tank is connected to the inlet of the air cooler / heat pump evaporator through the fourth pipeline and the second electric valve;

[0059] Further, the outlet of the air cooler / heat pump evaporator is connected in sequence with the fourth solenoid valve and the parallel compressor / heat pump compressor suction;

[0060] Furthermore, when the cold storage is running at a low rate in winter and the ambient temperature is low, resulting in insufficient heat source, the parallel compressor / heat pump compressor switches to heat pump mode, and its exhaust passes through the first pipeline, oil separator, and port A of the first three-way solenoid valve in sequence:

[0061] Further, the port B of the first three-way solenoid valve is connected to the second three-way solenoid valve, and the port C is connected to the hot side inlet of the high-temperature hot water heat exchanger;

[0062] Furthermore, the hot side outlet of the high-temperature hot water heat exchanger is connected to the second pipeline, the cold side inlet is connected to the third pump and the twenty-sixth pipeline in sequence and connected to the energy storage water tank, and the cold side outlet is connected to the energy storage water tank through the twenty-fifth pipeline.

[0063] Furthermore, when the heating water in the energy storage tank reaches 80-95°C, the hot air enters from port A and exits from port B of the first three-way solenoid valve, and does not pass through the heating heat exchanger to the air cooler for heat dissipation;

[0064] Furthermore, when the heating temperature in the energy storage tank is lower than 80-95°C, the hot air enters port C from port A of the first three-way solenoid valve, exchanges heat in the heating heat exchanger, and then dissipates heat in the air cooler.

[0065] Furthermore, the parallel compressor / heat pump compressor and air cooler / heat pump evaporator are CO2 refrigeration and CO2 heat pump hot and cold coupling, which can be automatically switched according to demand.

[0066] The present invention includes the following various working processes:

[0067] 1. The working process of production refrigeration is as follows:

[0068] The flash bypass gas is superheated in the medium temperature regenerator and then enters the parallel compressor for compression. Its exhaust gas passes through the oil separator to the air cooler for cooling. The air cooler consists of a high-pressure heat exchanger, a fan, a wet curtain, a spray pump, and a temperature sensor. It can automatically switch between dry and wet according to the ambient temperature collected by the temperature sensor and the air cooler outlet temperature.

[0069] The outlet of the air cooler is connected to the first electric valve and the ejector valve group 116-118 respectively, and the first electric valve plays a backup throttling role; the working principle of the ejector is based on the Venturi effect of the convergent-divergent nozzle, which converts the pressure energy (primary flow) of the motive fluid into kinetic energy to entrain the suction fluid (secondary flow), and then recompresses the mixed fluid by converting the kinetic energy back into pressure energy, that is, driven by high-temperature and high-pressure gas, which is used to extract low-pressure gas refrigerant from the medium-temperature evaporator and discharge the medium-pressure and temperature mixture to the flash tank. The advantage of using the ejector is that the medium-temperature compressor can be eliminated to increase the pressure and increase the system energy consumption; the ejector valve group 116-118 can adjust the number and opening of switches according to the system load rate and ambient temperature;

[0070] The liquid out of the flash tank is supercooled by the low-temperature regenerator and then supplied to the processing room evaporator, high-temperature evaporator, low-temperature evaporator, and quick-freezing evaporator. When there is no heat recovery in winter or the pressure difference between the flash tank pressure and the suction pressure of the medium-temperature evaporator is small in the transition season, the first pump connected in parallel to the liquid out of the flash tank is activated to compensate for the limited pressure increase provided by the ejector.

[0071] The liquid supply of the evaporator in the processing room needs to pass through the heat exchanger in the processing room to produce an ethylene glycol solution with a supply temperature of -3℃ and a return temperature of 2℃. The medium-temperature suction air returns to the ejector ports 116~118B, and its flash gas can also return to the parallel compressor for compression after being heated. The low-temperature suction air returns to the low-temperature compressor for compression after being heated, and the quick-frozen suction air returns to the quick-frozen compressor for compression after being heated. Its exhaust gas is collected in the twentieth pipeline and passes through the floor heating heat exchanger and the superheater for cooling in turn, and then is discharged to the medium-temperature suction air, completing a refrigeration cycle.

[0072] 2. The working process of hot water waste heat recovery for floor heating and air cooler defrosting hot water / and hot water for floor cleaning in the production workshop is as follows:

[0073] The exhaust gas from low-temperature compressors and quick-freezing compressors is overheated high-temperature gas. It is a waste of energy if it is directly condensed and discharged into the atmosphere. This part of "waste heat" can be recovered to prepare 10℃ supply / 5℃ return ethylene glycol solution, which can be used for cold storage floor antifreeze and improve system efficiency.

[0074] The high-temperature and high-pressure gas refrigerant is used as a heat source and the defrost heat exchanger is used to produce 20-25℃ defrosting hot water, which is then transported to the energy storage tank through the sixth pump to store heat for defrosting hot water for the fins of the air cooler and to ensure the stability of the system.

[0075] When the domestic hot water in the energy storage tank reaches 20-25℃, the hot air enters port A from port C of the third three-way solenoid valve and goes to the air cooler for heat dissipation without passing through the defrost heat exchanger;

[0076] When the domestic hot water in the energy storage tank is lower than 20-25℃, the hot air enters port B from port C of the third three-way solenoid valve, and then goes to the air cooler for heat dissipation after heat exchange in the defrost heat exchanger.

[0077] 3. The working process of air conditioning cooling in summer is as follows:

[0078] The flash tank is the cold source for summer air conditioning energy storage. It produces 7 / 12℃ air-conditioning water through the summer cold storage heat exchanger, and transports it to the energy storage water tank through the second pump to store cold for air conditioning refrigeration.

[0079] 4. The working process of heating, domestic hot water / tool ​​cleaning hot water storage is as follows:

[0080] High-temperature and high-pressure gas refrigerant is used as a heat source to produce 45-60℃ domestic hot water with the domestic hot water heat exchanger, which is then transported to the energy storage tank through the fourth pump for heat storage for heating / domestic hot water throughout the year to ensure the stability of the system;

[0081] When the domestic hot water in the energy storage tank reaches 45-60℃, the hot air enters from port A and exits from port B of the second three-way solenoid valve, and does not pass through the domestic hot water heat exchanger to the air cooler for heat dissipation;

[0082] When the domestic hot water in the energy storage tank is lower than 45-60℃, the hot air enters port C from port A of the second three-way solenoid valve, and then goes to the air cooler for heat dissipation after heat exchange in the domestic hot water heat exchanger.

[0083] 5. The working process of CIP cleaning and boiling high temperature hot water is as follows:

[0084] High-quality hot water is produced by high-temperature and high-pressure gas from parallel compressors for CIP cleaning and steaming and sterilization. When the cold storage startup rate is low and the ambient temperature is low, resulting in insufficient heat source, the parallel compressor / heat pump compressor switches to heat pump mode and the air cooler / heat pump evaporator acts as a heat pump evaporator. This has the advantage of increasing the operation rate of the machine head and replenishing high-quality heat in the system. In addition, the integration of the air cooler and heat pump evaporator heat exchanger can increase the inlet temperature of the heat pump evaporator and improve the condensation efficiency of the air cooler, achieving multiple goals at one stroke and ensuring the stability of the system.

[0085] When the heating water in the energy storage tank reaches 80-95℃, the hot air enters from port A and exits from port B of the first three-way solenoid valve, and does not pass through the high-temperature hot water heat exchanger to the air cooler for heat dissipation;

[0086] When the heating temperature in the energy storage tank is lower than 80-95℃, the hot air enters port C from port A of the first three-way solenoid valve, and then goes to the air cooler for heat dissipation after heat exchange in the high-temperature hot water heat exchanger.

[0087] Compared with the prior art, the present invention has the following advantages:

[0088] 1. The efficient and multifunctional CO2 transcritical all-season induced cold and heat coupling system provided by the present invention can provide a wide temperature band gradient energy solution of -45℃~+95℃, which can meet the needs of production cold (-35℃ quick freezing, -20~-25℃ low temperature refrigeration, 0~4℃ high temperature refrigeration, 8~15℃ processing room), production hot water (10℃ / 5℃ floor antifreeze, 25℃ / 15℃ defrosting hot water, 25℃ production workshop floor cleaning hot water), 7℃ / 12℃ air conditioning cooling, domestic hot water (45~60℃ heating, domestic hot water, tool cleaning hot water), 80~95℃ high temperature hot water (CIP cleaning, cooking) and other functions;

[0089] 2. The highly efficient and multifunctional CO2 transcritical all-season injection cold and heat coupling system provided by the present invention can save 6-15% energy compared with the CO2 parallel compression system; and can save 3-5% energy compared with the CO2 full injection in summer + flash evaporation bypass system in winter;

[0090] 3. The efficient and multifunctional CO2 transcritical all-season injection hot and cold coupling system provided by the present invention can automatically start and stop the booster pump to improve the system energy efficiency at low ambient temperature;

[0091] 4. The efficient and multifunctional CO2 transcritical all-season induced cold and heat coupling system provided by the present invention, the CO2 refrigeration system and the CO2 heat pump system are cold and hot coupled, and can be automatically switched according to demand;

[0092] 5. The highly efficient and multifunctional CO2 transcritical all-season induced cold and hot coupling system provided by the present invention has an air cooler (108) that integrates a high-pressure heat exchanger, a fan, a wet curtain, a spray pump, and a temperature sensor, and can automatically switch between dry and wet according to the ambient temperature collected by the temperature sensor and the outlet temperature of the air cooler (108);

[0093] 6. The highly efficient and multifunctional CO2 transcritical all-season induced cold and heat coupling system provided by the present invention integrates the air cooler / heat pump evaporator (109), which can increase the ambient temperature of the heat pump evaporator (109) and thus improve the energy efficiency of the heat pump, and improve the condensing efficiency of the air cooler (108), thereby achieving multiple goals at one stroke and ensuring the stability of the system;

[0094] 7. The efficient and multifunctional CO2 transcritical all-season induced cold and heat coupling system provided by the present invention has a refrigeration efficiency COP of 1.5 to 2.5 in the temperature range of the cold storage. The COP of the cold and heat coupling system technology of the present invention can reach more than 5.0.

[0095] 8. The efficient and multifunctional CO2 transcritical all-season induced heat and cold coupling system provided by the present invention can save about 1 / 3 of the machine room area compared to the traditional air-cooled heat pump system; the annual operating cost of the main equipment of the system can be saved by about 7.2%.

[0096] 9. The efficient and multifunctional CO2 transcritical all-season induced cooling and heating coupling system provided by the present invention adopts natural and environmentally friendly refrigerant CO2 (ODP=0, GWP=1) as refrigerant, which is more environmentally friendly.

[0097] In summary, the technical solution of the present invention solves the problems of traditional logistics parks in the prior art, which respectively set up refrigeration systems, air-conditioning systems, municipal or boiler systems according to the heating and cooling requirements of the production process, have low energy utilization, large initial investment, and are not in line with the promotion of green and low-carbon technologies in the refrigeration and air-conditioning industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0098] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0099] Figure 1 It is a schematic diagram of the system of the present invention;

[0100] Figure 2 This is a schematic diagram of the ejector interface of the present invention;

[0101] Figure 3 It is a schematic diagram of the interface of the three-way solenoid valve of the present invention.

[0102] In the figure: 101, parallel compressor 102, parallel compressor / heat pump compressor 103, oil separator 104, first three-way solenoid valve 105, second three-way solenoid valve 106, domestic hot water heat exchanger 107, high-temperature hot water heat exchanger 108, air cooler 109, air cooler / heat pump evaporator 110, first electric valve 111, first pump 112, low-temperature regenerator 113, low-temperature compressor 114, floor heating heat exchanger 115, desuperheater 116, first ejector 117, second ejector 118, third ejector 119, first solenoid valve 120, second solenoid valve 121, third solenoid valve 122, second electric valve 123, fourth solenoid valve Valve 124, first stop valve 125, second stop valve 126, heat exchanger 127, summer energy storage heat exchanger 128, third electric valve 129, medium temperature regenerator 130, high temperature evaporator 131, low temperature evaporator 132, fourth electric valve 133, fifth electric valve 134, processing room evaporator 135, sixth electric valve 136, energy storage water tank 137, floor heating pipe 138, flash tank 139, second pump 140, third pump 141, fourth pump 142, fifth pump 143, third three-way solenoid valve 144, defrost heat exchanger 145, sixth pump 146, seventh electric valve 147, quick freezing evaporator 148, quick freezing regenerator 149, quick freezing compressor;

[0103] 1. The first pipeline 2, the second pipeline 3, the third pipeline 4, the fourth pipeline 5, the fifth pipeline 6, the sixth pipeline 7, the seventh pipeline 8, the eighth pipeline 9, the ninth pipeline 10, the tenth pipeline 11, the eleventh pipeline 12, the twelfth pipeline 13, the thirteenth pipeline 14, the fourteenth pipeline 15, the fifteenth pipeline 16, the sixteenth pipeline 17, the seventeenth pipeline 18, the eighteenth pipeline 19, the nineteenth pipeline 20, the twentieth pipeline 21, the twenty-first pipeline 22, the twenty-second pipeline 23, the twenty-third pipeline 24, the twenty-fourth pipeline 25, the twenty-fifth pipeline 26, the twenty-sixth pipeline 27, the twenty-seventh pipeline 28, the twenty-eighth pipeline 29, the twenty-ninth pipeline 30, the thirtieth pipeline 31, the thirty-first pipeline 32, the thirty-second pipeline 33, the thirty-third pipeline 34, the thirty-fourth pipeline 35, the thirty-fifth pipeline DETAILED DESCRIPTION

[0104] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0105] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0106] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0107] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0108] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0109] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0110] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0111] As shown in the figure, the present invention provides a highly efficient and multifunctional CO2 transcritical all-season induced cold and heat coupling system that provides a wide temperature gradient energy solution of -45℃-+95℃ through a CO2 refrigeration system, meeting the functions of production cold, production hot water, domestic hot water, and high-temperature hot water;

[0112] Production refrigeration includes: quick freezing, freezing, refrigeration and processing rooms;

[0113] Hot water produced includes: floor antifreeze and defrost hot water;

[0114] Domestic hot water includes: air conditioning and heating;

[0115] High temperature hot water includes: CIP cleaning and steam sterilization.

[0116] The production cold includes: parallel compressor 101, parallel compressor / heat pump compressor 102, oil separator 103, first three-way solenoid valve 104, second three-way solenoid valve 105, air cooler 108, air cooler / heat pump evaporator 109, first electric valve 110, first pump 111, low-temperature regenerator 112, low-temperature compressor 113, floor heating heat exchanger 114, desuperheater 115, ejector, solenoid valve, first cut-off valve Valve 124, second stop valve 125, heat exchanger 126, third electric valve 128, medium temperature regenerator 129, high temperature evaporator 130, low temperature evaporator 131, fourth electric valve 132, fifth electric valve 133, processing room evaporator 134, sixth electric valve 135, flash tank 138, third three-way solenoid valve 143, seventh electric valve 146, quick freezing evaporator 147, quick freezing regenerator 148 and quick freezing compressor 149;

[0117] The exhaust gas of the parallel compressor 101 and the parallel compressor / heat pump compressor 102 is connected to the inlet of the oil separator 103 through the first pipeline 1;

[0118] The output end of the oil separator 103 is connected to the first three-way solenoid valve 104, the second three-way solenoid valve 105 and the third three-way solenoid valve 143 in sequence through the second pipeline 2;

[0119] The input ends of the air cooler 108 and the air cooler / heat pump evaporator 109 are connected to the second pipe 2 for cooling the high-temperature and high-pressure gas, and the output ends of the two are connected to the inlet of the hot side of the medium-temperature regenerator 129 through the third pipe 3;

[0120] The first electric valve 110 is used as a backup high-pressure throttle valve, with its input end connected to the outlet of the hot side of the medium-temperature regenerator 129 and its output end connected to the flash tank 138;

[0121] The solenoid valves include: a first solenoid valve 119, a second solenoid valve 120 and a third solenoid valve 121; the input ends of the first solenoid valve 119, the second solenoid valve 120 and the third solenoid valve 121 are connected to the hot side outlet of the medium temperature regenerator 129 through the fifteenth pipeline 15, the sixteenth pipeline 16 and the seventeenth pipeline 17 respectively;

[0122] The ejector includes: a first ejector 116, a second ejector 117 and a third ejector 118; the input ports A of the first ejector 116, the second ejector 117 and the third ejector 118 are respectively connected to the output ports of the first solenoid valve 119, the second solenoid valve 120 and the third solenoid valve 121 through pipelines, the input ports B are respectively connected to the ninth pipeline 9 of the medium temperature suction through the twelfth pipeline 12, the thirteenth pipeline 13 and the fourteenth pipeline 14, and the output ports C are respectively connected to the inlet of the flash tank 138 through pipelines;

[0123] The outlet of the flash tank 138 is connected to the fifth pipeline 5;

[0124] The first pump 111 is a booster pump connected in parallel with the fifth pipeline. The first pump 111 can start and stop automatically to improve the energy efficiency of the system when the ambient temperature is low;

[0125] The hot side input end of the low temperature regenerator 112 is connected to the fifth pipeline 5 through the sixth pipeline 6, and the hot side output end is connected to the quick freezing regenerator 148, the thirty-fourth pipeline 34, the input end of the third electric valve 128, the input end of the fourth electric valve 132, the input end of the fifth electric valve 133 and the input end of the seventh electric valve 146 in sequence through the seventh pipeline 7;

[0126] The output ends of the third electric valve 128, the fourth electric valve 132, the fifth electric valve 133 and the seventh electric valve 146 are respectively connected to the inlet of the hot side of the processing room heat exchanger 126, the inlet of the high temperature evaporator 130, the inlet of the low temperature evaporator 131 and the inlet of the quick freezing evaporator 147;

[0127] The hot side outlet of the process room heat exchanger 126 and the ninth pipeline 9;

[0128] The processing room evaporator 134 is connected to the cold side of the processing room heat exchanger 126 through the sixth electric valve 135 and the thirty-first pipeline 31, and its function is to produce a -3°C supply / 2°C return ethylene glycol solution to maintain the processing room temperature at 8-15°C;

[0129] The outlet of the high temperature evaporator 130 is connected to the ninth pipe 9, which is used to maintain the high temperature refrigeration temperature at 0-4°C;

[0130] The outlet of the low-temperature evaporator 131 is connected to the eighth pipeline 8, which is used to maintain the low-temperature refrigeration temperature at -20 to -25°C;

[0131] The outlet of the quick freezing evaporator 147 is connected to the thirty-fifth pipeline 35, which is used to maintain the temperature of the quick freezing store at -35°C;

[0132] The cold side input end of the medium temperature regenerator 129 is connected to the ninth pipeline 9 through the tenth pipeline 10 and the second stop valve 125, and the cold side output end is connected to the suction port of the parallel compressor 101 and the parallel compressor / heat pump compressor 102 through the eleventh pipeline 11, and its function is to increase the superheat of the medium temperature suction air;

[0133] The cold side input end of the low temperature heat regenerator 112 is connected to the eighth pipeline 8, and the cold side output end thereof is connected to the suction port of the low temperature compressor 113, and its function is to increase the superheat of the low temperature suction gas;

[0134] The cold side input end of the quick freezing regenerator 148 is connected to the thirty-fifth pipeline 35, and the cold side output end thereof is connected to the air intake port of the quick freezing compressor 149, and its function is to increase the superheat of the quick freezing air intake;

[0135] The low-temperature compressor 113 and the quick-freezing compressor 149 compress the low-temperature and low-pressure gas, and their outlets are connected to the 20th pipeline 20, the hot side interface of the floor heating heat exchanger 114, and the 21st pipeline 21 in sequence;

[0136] A desuperheater 115, whose input end is connected to the twenty-first pipeline 21 to reduce the superheat of the exhaust gas, and whose output end is connected to the ninth pipeline 9 through the twenty-second pipeline 22;

[0137] The flash gas in the flash tank 138 is connected to the tenth pipeline 10 through the first stop valve 124 and discharged.

[0138] The cold for production can be ejected in all seasons, and multiple ejectors can automatically start and stop and adjust the opening according to the season and system pressure.

[0139] The air cooler 108 integrates a high-pressure heat exchanger, a fan, a wet curtain, a spray pump, and a temperature sensor, and automatically switches between dry and wet according to the ambient temperature collected by the temperature sensor and the outlet temperature of the air cooler 108.

[0140] The integration of the air cooler / heat pump evaporator 109 can increase the ambient temperature of the heat pump evaporator and thus improve the energy efficiency of the heat pump, thereby improving the condensing efficiency of the air cooler 108 .

[0141] The production cold storage device includes a medium-temperature heat exchanger 129, a low-temperature heat exchanger 112, and a quick-freezing heat exchanger 148 for increasing the superheat of the suction air.

[0142] Hot water production includes: floor antifreeze heating and air cooler defrosting hot water;

[0143] The floor antifreeze heating includes: a floor heating heat exchanger 114, a floor heating pipe 137 and a fifth pump 142;

[0144] The hot side inlet and outlet of the floor heating heat exchanger 114 are respectively connected to the 20th pipeline 20 and the 21st pipeline 21, and the cold side inlet is connected to the fifth pump 142 and the 30th pipeline 30 in sequence, and the cold side outlet is connected to the 29th pipeline 29 and the inlet section of the floor heating pipe 137 in sequence;

[0145] The supply and return water temperature of the floor heating pipe 137 is 10°C supply / 5°C return ethylene glycol solution, which is used to prevent freezing of the cold storage floor; the outlet end of the floor heating pipe 137 is connected to the thirtieth pipeline 30.

[0146] The defrosting hot water of the air cooler is also used for cleaning the floor of the production workshop, and includes: an energy storage water tank 136, a third three-way solenoid valve 143, a defrosting heat exchanger 144 and a sixth pump 145;

[0147] The A port of the third three-way solenoid valve 143 is connected to the second pipeline 2, the B port is connected to the hot side inlet of the defrost heat exchanger 144, and the C port is connected to the outlet of the high-temperature and high-pressure oil separator 103;

[0148] The hot side output end of the defrost heat exchanger 144 is connected to the second pipeline 2;

[0149] The cold side input end of the defrost heat exchanger 144 is connected to the sixth pump 145 , the thirty-third pipeline 33 and the energy storage tank 136 in sequence, and the output end is connected to the thirty-second pipeline 32 and the energy storage tank 136 .

[0150] When the domestic hot water in the energy storage tank 136 reaches 20-25°C, the hot gas enters the A port from the third three-way solenoid valve 143C and goes to the air cooler 108 for heat dissipation without passing through the defrost heat exchanger 144;

[0151] When the domestic hot water in the energy storage water tank 136 is lower than 20-25°C, the hot air enters from the C port of the third three-way solenoid valve 143 and exits from the B port, and after heat exchange in the defrost heat exchanger 144, it is dissipated in the air cooler 108.

[0152] Domestic hot water includes: air conditioning and heating;

[0153] The air conditioner is for summer air conditioning energy storage, including: summer energy storage heat exchanger 127, energy storage water tank 136, flash tank 138 and second pump 139;

[0154] The flash tank 138 is a cold source for air conditioning energy storage, and is connected to the cold measuring inlet and outlet of the summer cold storage heat exchanger 127 through the eighteenth pipeline 18 and the nineteenth pipeline 19 respectively;

[0155] In summer, the hot side input end of the energy storage heat exchanger 127 is connected to the second pump 139 and the energy storage water tank 136 in sequence through the twenty-eighth pipeline 28, and the output end is connected to the energy storage water tank 136 through the twenty-seventh pipeline 27 to achieve 7 / 12℃ air-conditioning water energy storage.

[0156] Heating is heating / domestic hot water heat storage, including: a second three-way solenoid valve 105, a domestic hot water heat exchanger 106, an energy storage tank 136 and a fourth pump 141;

[0157] The A port of the second three-way solenoid valve 105 is connected to the outlet of the high-temperature and high-pressure oil separator 103, the B port is connected to the second pipeline 2, and the C port is connected to the hot side inlet of the domestic hot water heat exchanger 106;

[0158] The hot side output end of the domestic hot water heat exchanger 106 is connected to the second pipe 2, the cold side input end is connected to the fourth pump 141, the twenty-fourth pipe 24 and the energy storage tank 136 in sequence, and the output end is connected to the energy storage tank 136 through the twenty-third pipe 23.

[0159] When the domestic hot water in the energy storage tank 136 reaches 45-60°C, the hot gas enters from the A port of the second three-way solenoid valve 105 and exits from the B port, and does not pass through the domestic hot water heat exchanger 106 to the air cooler 108 for heat dissipation;

[0160] When the domestic hot water in the energy storage water tank 136 is lower than 45-60°C, the hot air enters from the A port of the second three-way solenoid valve 105 and exits from the C port, and after heat exchange in the domestic hot water heat exchanger 106, it is further dissipated in the air cooler 108.

[0161] High-temperature hot water is used for CIP cleaning and boiling, including: a parallel compressor / heat pump compressor 102, a first three-way solenoid valve 104, a second three-way solenoid valve 105, a high-temperature hot water heat exchanger 107, an air cooler / heat pump evaporator 109, a second electric valve 122, a fourth solenoid valve 123, an energy storage tank 136, a flash tank 138 and a third pump 140;

[0162] The liquid outlet of the flash tank 138 is connected to the inlet of the air cooler / heat pump evaporator 109 through the fourth pipeline 4 and the second electric valve 122;

[0163] The outlet of the air cooler / heat pump evaporator 109 is connected to the fourth solenoid valve 123 and the parallel compressor / heat pump compressor 102 suction in sequence;

[0164] When the cold storage is running at a low rate and the ambient temperature is low in winter, resulting in insufficient heat source, the parallel compressor / heat pump compressor 102 switches to the heat pump mode, and its exhaust passes through the first pipeline, the oil separator 103, and the first three-way solenoid valve 104A port in sequence.

[0165] The B port of the first three-way solenoid valve 104 is connected to the second three-way solenoid valve 105, and the C port is connected to the hot side inlet of the high-temperature hot water heat exchanger 107; the hot side outlet of the high-temperature hot water heat exchanger 107 is connected to the second pipeline 2, and the cold side inlet is connected to the third pump 140, the twenty-sixth pipeline 26 and the energy storage tank 136 in sequence, and the cold side outlet is connected to the energy storage tank 136 through the twenty-fifth pipeline 25.

[0166] When the heating water in the energy storage tank 136 reaches 80-95°C, the hot air enters from the A port of the first three-way solenoid valve 104 and exits from the B port, and does not pass through the heating heat exchanger to the air cooler 108 for heat dissipation;

[0167] When the heating temperature in the energy storage water tank 136 is lower than 80-95°C, the hot air enters from the A port of the first three-way solenoid valve 104 and exits from the C port, and after heat exchange in the heating heat exchanger, it is further dissipated in the air cooler 108.

[0168] The parallel compressor / heat pump compressor 102 and the air cooler / heat pump evaporator 109 are CO2 refrigeration and CO2 heat pump cold and hot coupling, and can be automatically switched according to demand.

[0169] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A highly efficient and multifunctional CO2 transcritical all-season induced cold and heat coupling system, characterized by: The highly efficient and multifunctional CO2 transcritical all-season induced cold and heat coupling system provides a wide temperature gradient energy solution of -45℃-+95℃ through the CO2 refrigeration system, meeting the functions of production cold, production hot water, domestic hot water and high-temperature hot water; The production cold includes: quick freezing, freezing, refrigeration and processing room; The produced hot water includes: floor antifreeze and defrost hot water; The domestic hot water includes: air conditioning and heating; The high-temperature hot water includes: CIP cleaning and steaming sterilization.

2. The highly efficient and multifunctional CO2 transcritical all-season induced cold and heat coupling system according to claim 1 is characterized by: The production cold includes: a parallel compressor (101), a parallel compressor / heat pump compressor (102), an oil separator (103), a first three-way solenoid valve (104), a second three-way solenoid valve (105), an air cooler (108), an air cooler / heat pump evaporator (109), a first electric valve (110), a first pump (111), a low-temperature regenerator (112), a low-temperature compressor (113), a floor heating heat exchanger (114), a desuperheater (115), an ejector, a solenoid valve, a first stop valve ( 124), a second stop valve (125), a heat exchanger (126), a third electric valve (128), a medium temperature regenerator (129), a high temperature evaporator (130), a low temperature evaporator (131), a fourth electric valve (132), a fifth electric valve (133), a processing room evaporator (134), a sixth electric valve (135), a flash tank (138), a third three-way solenoid valve (143), a seventh electric valve (146), a quick freezing evaporator (147), a quick freezing regenerator (148) and a quick freezing compressor (149); The exhaust gas of the parallel compressor (101) and the parallel compressor / heat pump compressor (102) is connected to the inlet of the oil separator (103) through the first pipeline (1); The output end of the oil separator (103) is connected to the first three-way solenoid valve (104), the second three-way solenoid valve (105) and the third three-way solenoid valve (143) in sequence through the second pipeline (2); The input ends of the air cooler (108) and the air cooler / heat pump evaporator (109) are connected to the second pipe (2) for cooling the high-temperature and high-pressure gas, and the output ends of the two are connected to the inlet of the hot side of the medium-temperature regenerator (129) through the third pipe (3); The first electric valve (110) is used as a high-pressure throttle valve in reserve, with its input end connected to the outlet of the hot side of the medium-temperature regenerator (129) and its output end connected to the flash tank (138); The solenoid valve comprises: a first solenoid valve (119), a second solenoid valve (120) and a third solenoid valve (121); the input ends of the first solenoid valve (119), the second solenoid valve (120) and the third solenoid valve (121) are respectively connected to the hot side outlet of the medium temperature regenerator (129) through a fifteenth pipeline (15), a sixteenth pipeline (16) and a seventeenth pipeline (17); The ejector comprises: a first ejector (116), a second ejector (117) and a third ejector (118); the input ports A of the first ejector (116), the second ejector (117) and the third ejector (118) are respectively connected to the output ports of the first solenoid valve (119), the second solenoid valve (120) and the third solenoid valve (121) through pipelines, the input ports B are respectively connected to the ninth pipeline (9) of medium-temperature air intake through the twelfth pipeline (12), the thirteenth pipeline (13) and the fourteenth pipeline (14), and the output ports C are respectively connected to the inlet of the flash tank (138) through pipelines; The outlet of the flash tank (138) is connected to the fifth pipeline (5); The first pump (111) is a booster pump connected in parallel with the fifth pipeline, and the first pump (111) can be automatically started and stopped to improve the energy efficiency of the system when the ambient temperature is low; The hot side input end of the low-temperature regenerator (112) is connected to the fifth pipeline (5) via the sixth pipeline (6), and the hot side output end is connected in sequence to the quick-freezing regenerator (148), the thirty-fourth pipeline (34), the input end of the third electric valve (128), the input end of the fourth electric valve (132), the input end of the fifth electric valve (133), and the input end of the seventh electric valve (146) via the seventh pipeline (7); The output ends of the third electric valve (128), the fourth electric valve (132), the fifth electric valve (133) and the seventh electric valve (146) are respectively connected to the inlet of the hot side of the processing room heat exchanger (126), the inlet of the high-temperature evaporator (130), the inlet of the low-temperature evaporator (131) and the inlet of the quick-freezing evaporator (147); The hot side outlet of the processing room heat exchanger (126) and the ninth pipeline (9); The processing room evaporator (134) is connected to the cold side of the processing room heat exchanger (126) through the sixth electric valve (135) and the thirty-first pipeline (31), and its function is to produce a -3°C supply / 2°C return ethylene glycol solution to maintain the processing room temperature at 8-15°C; The outlet of the high-temperature evaporator (130) is connected to the ninth pipeline (9), which is used to maintain the high-temperature refrigeration temperature at 0-4°C; The outlet of the low-temperature evaporator (131) is connected to the eighth pipeline (8), which is used to maintain the low-temperature refrigeration temperature at -20 to -25°C; The outlet of the quick freezing evaporator (147) is connected to the thirty-fifth pipeline (35), which is used to maintain the temperature of the quick freezing store at -35°C; The cold side input end of the medium temperature heat regenerator (129) is connected to the ninth pipeline (9) through the tenth pipeline (10) and the second stop valve (125), and the cold side output end is connected to the suction port of the parallel compressor (101) and the parallel compressor / heat pump compressor (102) through the eleventh pipeline (11), and its function is to increase the superheat of the medium temperature suction air; The cold side input end of the low temperature heat regenerator (112) is connected to the eighth pipeline (8), and the cold side output end is connected to the air intake port of the low temperature compressor (113), and its function is to increase the superheat of the low temperature air intake; The cold side input end of the quick freezing regenerator (148) is connected to the thirty-fifth pipeline (35), and the cold side output end is connected to the air intake port of the quick freezing compressor (149), and its function is to increase the superheat degree of the quick freezing air intake; The low-temperature compressor (113) and the quick-freezing compressor (149) compress the low-temperature and low-pressure gas, and their outlets are connected to the twentieth pipeline (20), the hot side interface of the floor heating heat exchanger (114), and the twenty-first pipeline (21) in sequence; The desuperheater (115) has an input end connected to the twenty-first pipeline (21) to reduce the superheat of the exhaust gas, and an output end connected to the ninth pipeline (9) through the twenty-second pipeline (22); The flash gas in the flash tank (138) is connected to the tenth pipeline (10) through the first stop valve (124) and discharged.

3. The high-efficiency and multifunctional CO2 transcritical all-season induced cold and heat coupling system according to claim 2 is characterized by: The production cold can be ejected in all seasons, and multiple ejectors can automatically start and stop and adjust the opening according to the season and system pressure.

4. The high-efficiency and multifunctional CO2 transcritical all-season induced cold and heat coupling system according to claim 2 is characterized by: The air cooler (108) integrates a high-pressure heat exchanger, a fan, a wet curtain, a spray pump, and a temperature sensor, and automatically switches between dry and wet according to the ambient temperature collected by the temperature sensor and the outlet temperature of the air cooler (108).

5. The efficient and multifunctional CO2 transcritical all-season induced cold and heat coupling system according to claim 2 is characterized by: The air cooler / heat pump evaporator (109) integration can increase the ambient temperature of the heat pump evaporator and thus improve the energy efficiency of the heat pump, thereby improving the condensing efficiency of the air cooler (108).

6. The high-efficiency and multifunctional CO2 transcritical all-season induced cold and heat coupling system according to claim 2 is characterized by: The production cold storage device comprises a medium temperature heat regenerator (129), a low temperature heat regenerator (112), and a quick freezing heat regenerator (148) for increasing the superheat of the suction air.

7. The high-efficiency and multifunctional CO2 transcritical all-season induced cold and heat coupling system according to claim 1 is characterized by: The produced hot water includes: floor antifreeze heating and air cooler defrosting hot water; The floor antifreeze heating system comprises: a floor heating heat exchanger (114), a floor heating pipe (137) and a fifth pump (142); The hot side inlet and outlet of the floor heating heat exchanger (114) are respectively connected to the twentieth pipeline (20) and the twenty-first pipeline (21), the cold side inlet is sequentially connected to the fifth pump (142) and the thirtieth pipeline (30), and the cold side outlet is sequentially connected to the twenty-ninth pipeline (29) and the inlet section of the floor heating pipe (137); The supply and return water temperature of the floor heating pipe (137) is 10°C supply / 5°C return ethylene glycol solution, which is used for antifreeze of cold storage floor; the outlet end of the floor heating pipe (137) is connected to the thirtieth pipeline (30). The defrosting hot water of the air cooler is also hot water for cleaning the floor of the production workshop, and comprises: an energy storage water tank (136), a third three-way solenoid valve (143), a defrosting heat exchanger (144) and a sixth pump (145); The A port of the third three-way solenoid valve (143) is connected to the second pipeline (2), the B port is connected to the hot side inlet of the defrost heat exchanger (144), and the C port is connected to the outlet of the high-temperature and high-pressure oil separator (103); The hot side output end of the defrost heat exchanger (144) is connected to the second pipeline (2); The cold side input end of the defrost heat exchanger (144) is connected to the sixth pump (145), the thirty-third pipeline (33) and the energy storage tank (136) in sequence, and the output end is connected to the thirty-second pipeline (32) and the energy storage tank (136).

8. The high-efficiency and multifunctional CO2 transcritical all-season induced cold and heat coupling system according to claim 1 is characterized by: The domestic hot water includes: air conditioning and heating; The air conditioner is a summer air conditioner energy storage device, comprising: a summer energy storage heat exchanger (127), an energy storage water tank (136), a flash tank (138) and a second pump (139); The flash tank (138) is a cold source for air conditioning energy storage, and is connected to the cold measuring inlet and outlet of the summer cold storage heat exchanger (127) through the eighteenth pipeline (18) and the nineteenth pipeline (19) respectively; The hot side input end of the summer energy storage heat exchanger (127) is connected to the second pump (139) and the energy storage water tank (136) in sequence through the twenty-eighth pipeline (28), and the output end is connected to the energy storage water tank (136) through the twenty-seventh pipeline (27), so as to realize 7 / 12°C air conditioning water energy storage. The heating is heating / domestic hot water heat storage, comprising: a second three-way solenoid valve (105), a domestic hot water heat exchanger (106), an energy storage water tank (136) and a fourth pump (141); The A port of the second three-way solenoid valve (105) is connected to the outlet of the high-temperature and high-pressure oil separator (103), the B port is connected to the second pipeline (2), and the C port is connected to the hot side inlet of the domestic hot water heat exchanger (106); The hot side output end of the domestic hot water heat exchanger (106) is connected to the second pipeline (2), the cold side input end is connected to the fourth pump (141), the twenty-fourth pipeline (24) and the energy storage tank (136) in sequence, and the output end is connected to the energy storage tank (136) through the twenty-third pipeline (23).

9. The high-efficiency and multifunctional CO2 transcritical all-season induced cold and heat coupling system according to claim 1 is characterized by: The high-temperature hot water is used for CIP cleaning and boiling, and comprises: a parallel compressor / heat pump compressor (102), a first three-way solenoid valve (104), a second three-way solenoid valve (105), a high-temperature hot water heat exchanger (107), an air cooler / heat pump evaporator (109), a second electric valve (122), a fourth solenoid valve (123), an energy storage water tank (136), a flash tank (138) and a third pump (140); The liquid outlet of the flash tank (138) is connected to the inlet of the air cooler / heat pump evaporator (109) through the fourth pipeline (4) and the second electric valve (122); The outlet of the air cooler / heat pump evaporator (109) is connected to the fourth solenoid valve (123) and the air intake of the parallel compressor / heat pump compressor (102) in sequence; The B port of the first three-way solenoid valve (104) is connected to the second three-way solenoid valve (105), and the C port is connected to the hot side inlet of the high-temperature hot water heat exchanger (107); The hot side outlet of the high-temperature hot water heat exchanger (107) is connected to the second pipe (2), and the cold side inlet is connected to the third pump (140), the twenty-sixth pipe (26) and the energy storage tank (136) in sequence, and the cold side outlet is connected to the energy storage tank (136) through the twenty-fifth pipe (25).

10. The high-efficiency and multifunctional CO2 transcritical all-season induced heat and cold coupling system according to claim 1 is characterized by: The parallel compressor / heat pump compressor (102) and the air cooler / heat pump evaporator (109) are CO2 refrigeration and CO2 heat pump cold and hot coupling, and can be automatically switched according to demand.

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