Parallel injection type heat pump and multi-effect parallel injection type heat pump

Abstract

The utility model discloses a parallel injection type heat pump, which belongs to the technical field of heat pumps, and comprises injectors, a plurality of injectors are arranged in parallel, steam exhaust inlets of the plurality of injectors are communicated with a steam exhaust outlet of a first evaporation unit, mixed steam outlets of the plurality of injectors are communicated with a first condensation unit, and the mixed steam outlets of the plurality of injectors are communicated with a second condensation unit. The multi-effect parallel injection type heat pump system further comprises a multi-effect parallel injection type heat pump, and the first evaporation units of the multiple parallel injection type heat pumps are connected in series. According to the system, the multiple ejectors operate in parallel, the dead steam treatment load is shared, the system can adapt to the large-flow working condition, the overall ejection efficiency and the steam boosting capacity of the system are remarkably improved, when a single ejector breaks down, the other ejectors can still maintain operation, the shutdown risk is reduced, and the system reliability is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of heat pump, especially parallel injection type heat pump and multi-effect parallel injection type heat pump. BACKGROUND

[0002] As a kind of high-efficiency heat recovery device, injection type heat pump is widely used in industrial waste heat recovery, steam pressure boosting and other fields.The traditional design usually adopts single ejector, mixes low-pressure exhaust steam with high-pressure working steam by injection effect, improves exhaust steam pressure and recovers heat energy.However, with the expansion of industrial scale and the improvement of energy efficiency, single ejector system exposes the following problems:

[0003] Processing capacity and efficiency conflict: single ejector is limited by structural size and fluid dynamics characteristics, injection efficiency is significantly reduced when processing large-flow exhaust steam, leading to system energy efficiency decline.

[0004] Insufficient reliability: single ejector failure directly leads to system shutdown, high maintenance cost and affects production continuity.

[0005] Flow resistance and uneven distribution: concentrated arrangement of exhaust steam inlet is easy to form local vortex or pressure drop, reduces steam mixing uniformity, affects condensing unit heat exchange efficiency.

[0006] Multi-effect system complexity: existing multi-effect heat pump system mostly adopts series ejector design, pipeline is complex and control is difficult, and it is difficult to realize high-efficiency heat energy cascade utilization.

[0007] Therefore, it is urgent to develop an injection type heat pump system capable of improving processing capacity, enhancing system stability, optimizing steam distribution and simplifying multi-effect structure. INVENTION CONTENTS

[0008] The utility model aims at providing parallel injection type heat pump and multi-effect parallel injection type heat pump to solve the above problems existing in prior art.

[0009] Technical scheme: parallel injection type heat pump, comprising: ejector, multiple ejectors are arranged in parallel, the steam exhaust steam inlets of multiple ejectors are communicated with the exhaust steam outlets of first evaporation unit, and the mixed steam outlets of multiple ejectors are communicated with first condensing unit.

[0010] Further, the first evaporation unit is provided with exhaust steam outlet communicated with steam exhaust steam inlet.

[0011] Further, multiple exhaust steam outlets are arranged on the first evaporation unit in circle or matrix or randomly.

[0012] Further, the first condensing unit is provided with mixed steam inlet communicated with mixed steam outlet.

[0013] Further, multiple said mixed steam inlets are arranged in a circle, matrix or randomly on the first condensing unit.

[0014] Further, a medium inlet and a medium outlet are arranged on the first evaporating unit.

[0015] Further, a demister is arranged in the first evaporating unit.

[0016] Further, a condensate outlet is arranged on the first condensing unit.

[0017] A multi-effect parallel ejector heat pump comprises the parallel ejector heat pump described above, and first evaporating units of multiple said parallel ejector heat pumps are connected in series.

[0018] Further, medium transfer between adjacent first evaporating units is realized by gravity or by a pump.

[0019] Advantages:

[0020] The parallel ejector heat pump of the present application significantly improves performance through the following design:

[0021] 1. Parallel ejector design:

[0022] Improved processing capacity: multiple ejectors operate in parallel to share the steam treatment load, which can adapt to large flow conditions and significantly improve the overall efficiency of the system and the steam pressure boosting capacity.

[0023] Enhanced system redundancy: when a single ejector fails, the remaining ejectors can still maintain operation, reducing the risk of downtime and improving system reliability.

[0024] 2. Optimized steam distribution:

[0025] Diversified arrangement of steam outlets and mixing inlets (such as circular, matrix or random arrangement): reduces local flow resistance, promotes uniform steam distribution, reduces pressure drop loss and improves mixing efficiency.

[0026] 3. Multi-effect structure simplification and energy efficiency improvement:

[0027] Multi-effect series evaporating unit: by connecting multiple parallel ejector heat pumps in series, heat energy is utilized in stages, and the waste heat recovery rate is improved.

[0028] Flexible medium transfer method (gravity or pumping): suitable for different working conditions, reduces energy consumption and simplifies pipeline design. BRIEF DESCRIPTION OF DRAWINGS

[0029] Fig. 1 is a structural schematic diagram of the parallel ejector heat pump implemented by the present utility model;

[0030] Fig. 2This is a schematic diagram of the structure of the multi-effect parallel ejector heat pump of this utility model;

[0031] The attached figures are labeled as follows: First evaporation unit 100, exhaust steam outlet 110, ejector 200, steam exhaust inlet 210, mixed steam outlet 220, first condensation unit 300, mixed steam inlet 310, medium inlet 400, medium outlet 500, and condensate outlet 600. Detailed Implementation

[0032] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0033] Example: Figs. 1-2 As shown, the parallel ejector heat pump system is a highly efficient and reliable heat energy recovery and utilization device. By arranging multiple ejectors in parallel, the system's processing capacity and stability can be significantly improved. The core components of this system include a first evaporation unit 100, multiple ejectors 200, and a first condensation unit 300. In this design, multiple ejectors operate in parallel. The exhaust steam inlet 210 of each ejector is connected to the exhaust steam outlet of the first evaporation unit 100, while the mixed steam outlet 220 is connected to the first condensation unit 300. Each ejector 200 is equipped with a fresh steam inlet for introducing driving steam. This parallel structure not only shares the exhaust steam processing load but also adapts to high-flow-rate conditions, effectively avoiding the efficiency drop of a single ejector under high loads.

[0034] Specifically, the first evaporation unit 100 is provided with multiple exhaust steam outlets 110 connected to the exhaust steam inlet 210 of the ejector. These outlets can be arranged circumferentially, in a matrix, or randomly to ensure optimal flow performance. For example, a circumferential arrangement is suitable for circular evaporation units and helps reduce radial flow differences; a matrix arrangement ensures that the exhaust steam is evenly distributed within a rectangular cross-section, reducing local pressure drop; while a random arrangement uses statistical methods to disperse peak flow resistance, adapting to complex operating conditions and preventing excessively high local flow velocities caused by concentrated outlets. In addition, the first evaporation unit 100 is also equipped with a medium inlet 400 and a medium outlet 500 for introducing and discharging the working medium, and has an internal demister to separate liquid droplets entrained in the exhaust steam, preventing them from entering the ejector and causing blockage or corrosion, thereby ensuring that the exhaust steam entering the ejector is in a dry saturated state and improving ejection efficiency.

[0035] Meanwhile, the first condensing unit 300 is equipped with a mixing steam inlet 310 connected to the mixing steam outlet 220 of the ejector. These inlets can also be arranged in a circular, matrix, or random pattern to achieve uniform distribution of steam flow. The multi-inlet layout helps to disperse the steam flow, prevent overheating or insufficient condensation on local heat exchange surfaces, and ensures a more uniform distribution of steam within the condensing unit, fully utilizing the heat exchange area while avoiding fouling problems caused by excessively low local flow velocities. The condensing unit is also equipped with a condensate outlet 600 for discharging cooled condensate.

[0036] In summary, this parallel ejector heat pump system, through its multi-ejector parallel design, effectively improves the system's operating efficiency and reliability under high-load conditions. Simultaneously, it achieves waste steam pressurization and heat recovery, enhancing waste heat utilization and demonstrating significant application value.

[0037] In a parallel ejector heat pump system, the design of the ejector is crucial, determining not only the overall system efficiency but also its stability and reliability. The ejector operates based on fundamental principles of fluid mechanics, using high-pressure steam to drive low-pressure steam for mixing and pressurization, thereby achieving energy conversion and transfer. Specifically, the ejector consists of four main parts: a waste steam inlet 210, a fresh steam inlet, a mixing chamber, and a mixed steam outlet 220. When low-pressure waste steam from the first evaporation unit 100 enters the ejector through the waste steam inlet 210, it mixes with the high-pressure driving steam in the mixing chamber, forming a higher-pressure mixed steam, which is ultimately output to the first condensation unit 300 through the mixed steam outlet 220.

[0038] The primary purpose of paralleling multiple injectors is to distribute the waste steam handling load of the system. Since a single injector is prone to efficiency degradation or even failure when handling large volumes of waste steam, paralleling multiple injectors significantly improves the system's processing capacity. For example, if one injector fails, the remaining injectors can continue operating normally, greatly reducing the risk of downtime and improving the overall reliability of the system. Furthermore, this design allows for flexible adjustment of the number and operating status of injectors according to actual operating conditions, further optimizing system efficiency.

[0039] The advantages of parallel injectors can be analyzed in detail from the following aspects:

[0040] 1. Load Balancing: Parallel injectors can evenly distribute the total exhaust steam processing load across all injectors, preventing individual injectors from experiencing efficiency drops or damage due to excessive load. This not only extends the service life of the equipment but also reduces maintenance costs.

[0041] 2. Redundancy Design: By connecting multiple injectors in parallel, even if one injector fails, the others can continue to operate, ensuring that the system does not stop operating due to the failure of a single component. This redundancy design greatly improves the reliability and stability of the system.

[0042] 3. Flexibility: Parallel injectors can flexibly adjust their operating modes according to different working conditions. For example, under high load conditions, all injectors can operate simultaneously; while under low load conditions, some injectors can stop working, saving energy consumption.

[0043] 4. Energy Saving Effect: Because multiple injectors share the load, the workload of each injector is relatively small, allowing it to operate within a more efficient range, thereby improving the overall system's energy efficiency ratio. Furthermore, through reasonable layout and design, the steam flow path can be further optimized, reducing unnecessary energy loss.

[0044] In summary, the parallel injector design not only solves the problem of efficiency reduction of a single injector under high load, but also significantly improves the reliability and energy efficiency of the system through multiple advantages such as load balancing, redundancy design and flexibility, making it an ideal heat recovery solution.

[0045] The optimized design and importance of the exhaust steam outlet: In a parallel ejector heat pump system, the exhaust steam outlet 110 on the first evaporator unit 100 plays a crucial role. These outlets are not only key interfaces connecting the evaporator unit and the ejector, but also important channels to ensure efficient exhaust steam removal. To optimize the design of the exhaust steam outlet, three arrangement methods are typically adopted: circular arrangement, matrix arrangement, and random arrangement.

[0046] First, the circumferential arrangement is particularly suitable for circular evaporation units. In this arrangement, multiple exhaust steam outlets are evenly distributed along the outer edge of the evaporation unit. The advantage of this design is that it effectively reduces radial flow differences, making the steam flow within the evaporation unit more uniform, thereby reducing localized eddies and pressure losses. Furthermore, the circumferential arrangement maximizes the utilization of the evaporation unit's surface area, improving steam extraction efficiency and avoiding energy losses caused by localized poor flow.

[0047] Secondly, the matrix arrangement is more suitable for rectangular or square evaporation units. In this arrangement, the exhaust steam outlets are arranged in a specific row and column pattern, forming a regular matrix structure. This design ensures that the exhaust steam is evenly distributed throughout the entire evaporation unit, avoiding excessively high flow velocities or pressure drops in localized areas. In this way, the steam can flow more smoothly to the ejectors, reducing flow resistance and improving the overall efficiency of the system.

[0048] Finally, while the random arrangement may seem disordered, it is actually designed based on statistical principles. Through scientific calculations and simulations, multiple exhaust steam outlets can be randomly distributed at different locations within the evaporation unit to disperse peak flow resistance. This method is particularly suitable for complex operating conditions, such as irregularly shaped evaporation units or situations with multiple interfering factors. Random arrangement avoids the problem of excessively high local flow velocities caused by concentrated outlets, thereby reducing energy loss and ensuring that steam can be efficiently drawn into and mixed by the ejector.

[0049] Regardless of the layout method adopted, the design of the exhaust steam outlet needs to consider the following key factors:

[0050] 1. Uniform Distribution: Ensuring uniform distribution of exhaust steam within the evaporation unit is one of the core objectives of optimizing the outlet design. Uniformly distributed exhaust steam is more easily and efficiently drawn into the injector, thereby improving the overall system energy efficiency.

[0051] 2. Minimize flow resistance: Reducing flow resistance not only lowers energy loss but also improves system operating efficiency. By rationally designing the location and number of outlets, local eddies and pressure losses can be effectively reduced, ensuring smooth steam flow.

[0052] 3. Adaptability to Different Operating Conditions: Different application scenarios may have different requirements for exhaust steam outlets. Therefore, the specific operating conditions of the system should be fully considered during the design phase, and the most suitable layout should be selected to cope with various complex operating environments.

[0053] In conclusion, the optimized design of the exhaust steam outlet not only directly affects the system's operating efficiency but also largely determines its reliability and stability. A scientifically sound layout can minimize flow resistance and energy loss, ensuring efficient exhaust steam removal and providing a solid foundation for subsequent heat recovery.

[0054] Design and function of the mixing steam inlet

[0055] In a parallel ejector heat pump system, the mixing steam inlet 310 on the first condensing unit 300 serves as a crucial channel connecting the ejector and the condensing unit, and its design is vital to the overall system operating efficiency and heat recovery effect. The function of the mixing steam inlet is to ensure that the mixed steam, after being pressurized by the ejector, can efficiently enter the condensing unit, thereby achieving effective heat exchange and condensation.

[0056] Specifically, the advantages of a mixed steam inlet design include the following:

[0057] 1. Multi-inlet layout: To ensure uniform steam flow distribution, a multi-inlet layout is typically used for mixing steam inlets. This design effectively disperses the steam flow, preventing localized overheating or insufficient condensation on the heat exchange surface. For example, multiple inlets can be arranged along the circumference or in a matrix along the condensing unit, allowing the steam to be evenly distributed within the condensing unit, fully utilizing the heat exchange area, and improving condensation efficiency.

[0058] 2. Preventing localized overheating: If the steam flow is concentrated in a small area, it may cause localized overheating of the heat exchange surface, thus affecting the condensation effect. A multi-inlet layout allows steam to be distributed more evenly throughout the condensing unit, preventing localized overheating and ensuring efficient operation of the entire condensing unit.

[0059] 3. Preventing Insufficient Condensation: Conversely, if the steam flow rate in some areas is too low, it may lead to insufficient condensation, affecting the overall efficiency of the system. A multi-inlet layout can ensure a uniform distribution of steam flow, prevent insufficient condensation in localized areas, and ensure the smooth progress of the condensation process.

[0060] 4. Reduce fouling: During steam condensation, if the local flow rate is too low, fouling may occur, affecting heat exchange efficiency. By properly designing the mixing steam inlet, the problem of excessively low local flow rates can be avoided, ensuring uniform steam flow within the condensation unit and reducing the possibility of fouling.

[0061] In addition to the functions mentioned above, the design of the mixing steam inlet also needs to take into account the specific operating conditions and requirements of the system. For example, factors such as steam flow rate, temperature, and pressure under different application scenarios will affect the inlet design. To cope with these changes, the system can flexibly adjust the steam flow rate by adjusting the operating status of the ejector or increasing / decreasing the number of inlets, ensuring that the system is always in optimal operating condition.

[0062] In summary, the design of the mixed steam inlet not only affects the system's operating efficiency but also directly impacts the heat recovery effect. A multi-inlet layout and rational design can ensure uniform steam distribution within the condensation unit, avoiding localized overheating or insufficient condensation, reducing fouling deposits, and improving the overall system performance.

[0063] The function and importance of demisters

[0064] In a parallel ejector heat pump system, the exhaust steam outlet 110 is located above the demister. The demister installed in the first evaporation unit 100 is a crucial component. Its main function is to separate liquid droplets entrained in the exhaust steam, preventing these droplets from entering the ejector and thus avoiding problems such as clogging or corrosion. The use of the demister not only improves the system's operating efficiency but also extends the equipment's service life.

[0065] Specifically, during the evaporation process, exhaust steam often carries tiny droplets. If these droplets directly enter the ejector, it can cause a series of problems. First, the presence of droplets increases the frictional resistance inside the ejector, reducing its efficiency. Second, droplets may accumulate inside the ejector, causing pipe blockage and affecting the normal operation of the system. More seriously, impurities or corrosive components in the droplets can erode the ejector materials, shortening the equipment's lifespan.

[0066] Demisters effectively separate liquid droplets entrained in exhaust steam through physical interception and inertial separation. Common types of demisters include wire mesh demisters, vane demisters, and cyclone demisters. Wire mesh demisters capture droplets using a fine metal mesh and are suitable for handling gases containing small droplets; vane demisters utilize changes in airflow direction to cause droplets to impact and be captured by the vane surface; cyclone demisters use high-speed rotating airflow to throw droplets against the cylinder wall for collection.

[0067] In parallel ejector heat pump systems, the application of demisters is particularly important. Because the system uses multiple ejectors connected in parallel, a problem with any one ejector will affect the overall system efficiency. Therefore, ensuring that the exhaust steam entering the ejectors is dry saturated steam is crucial. Dry saturated steam not only improves the ejector's entrainment efficiency but also reduces equipment wear and extends its service life.

[0068] Furthermore, the presence of a demister helps improve the safety and stability of the system. For example, in high-temperature and high-pressure environments, the presence of droplets can cause serious safety hazards, such as equipment explosion or leakage. By using a demister, these potential risks can be effectively eliminated, ensuring the safe operation of the system.

[0069] In summary, the demister plays an indispensable role in a parallel ejector heat pump system. It not only improves system operating efficiency but also extends equipment lifespan and enhances system safety and stability. By effectively separating liquid droplets from the exhaust steam, the demister ensures that the exhaust steam entering the ejector is in a dry-saturated state, thereby improving the overall system's energy efficiency and reliability.

[0070] Working principle and advantages of multi-effect parallel ejector heat pump system

[0071] The multi-effect parallel ejector heat pump system is a high-efficiency heat recovery device that further extends the aforementioned parallel ejector heat pump. Its core idea is to connect multiple first evaporation units 100 of parallel ejector heat pumps in series to form a multi-stage heat pump system, thereby achieving higher energy efficiency and a wider range of temperature difference handling capabilities. This design not only inherits the advantages of parallel ejector heat pumps but also further enhances the overall system performance through multi-stage pressurization and progressive heat transfer.

[0072] Specifically, the working process of a multi-effect parallel ejector heat pump system is as follows:

[0073] 1. First Evaporation Unit 100: First, the first evaporation unit receives the initial working medium and generates low-pressure exhaust steam in the process. This exhaust steam is pressurized by multiple ejectors 200 and then sent to the first condensation unit 300 for condensation.

[0074] 2. Second Evaporation Unit 100: The waste heat generated by the first evaporation unit is used as the working heat source for the second evaporation unit. In the second evaporation unit, the new working medium is heated to generate low-pressure exhaust steam again, which is then pressurized by another set of ejectors and subsequently sent to the corresponding condensation unit.

[0075] 3. Multi-stage series connection: Similarly, by connecting multiple evaporation units in series, the system can gradually increase the pressure of the exhaust steam and use the waste heat generated by each evaporation unit as the heat source for the next evaporation unit. This not only improves the overall energy efficiency but also allows the system to handle a wider range of temperature differences.

[0076] The advantages of multi-effect parallel ejector heat pump systems are mainly reflected in the following aspects:

[0077] 1. High Energy Efficiency: Through multi-stage pressurization and progressive heat transfer, the system can gradually increase the exhaust steam pressure to a higher level, thereby achieving more efficient heat recovery. Each evaporation unit utilizes the waste heat from the previous stage as a heat source, maximizing the use of available energy.

[0078] 2. Adaptability to a wide range of temperature differences: Traditional single-stage heat pump systems often struggle to handle large temperature differences, while multi-effect parallel ejector heat pump systems, through multi-stage series connection, can handle a wide range of temperature scenarios from low to high temperatures. This characteristic makes them promising for applications in fields such as industrial waste heat recovery.

[0079] 3. Flexibility and Reliability: The multi-effect parallel ejector heat pump system offers two working fluid transport path options—gravity transport and pump transport. Gravity transport utilizes the natural flow due to elevation difference, requiring no additional energy consumption and reducing the complexity of the pump and control system; while pump transport can flexibly adapt to various operating conditions by adjusting the pump speed to match different loads according to specific operating requirements.

[0080] 4. Reduced downtime risk: Compared to a single ejector, the multi-effect parallel ejector heat pump system further distributes the load through the design of multiple parallel ejectors, reducing the risk of single-point failure. Even if one ejector or evaporator unit fails, the other parts can continue to operate, ensuring the continuity and reliability of the system.

[0081] 5. Economic efficiency and environmental friendliness: By efficiently recovering and utilizing waste heat, the multi-effect parallel ejector heat pump system not only reduces energy consumption but also...

[0082] Work process:

[0083] 1. Exhaust steam generation and input

[0084] Step 1: An external heat source, such as industrial waste heat or low-pressure steam, enters the first evaporation unit 100 through the medium inlet 400 to heat the working medium, such as water, to generate low-pressure exhaust steam.

[0085] Step 2: The exhaust steam is discharged through the exhaust steam outlet 110 of the evaporation unit 100 and evenly distributed to the steam exhaust steam inlet 210 of the parallel ejector 200 through multiple outlets arranged in a circular / matrix / random pattern.

[0086] 2. Injector ejection and mixing pressurization

[0087] Step 3: Each injector 200 uses the working steam high-pressure steam or motive fluid to generate an ejector effect, drawing in and mixing with low-pressure exhaust steam.

[0088] Step 4: The mixed steam completes the conversion of kinetic energy and pressure energy in the ejector. The pressurized mixed steam is output from the mixed steam outlet 220 and enters the first condensation unit 300 through multiple mixed steam inlets 310.

[0089] 3. Condensation and heat release

[0090] Step 5: The pressurized steam exchanges heat with the cooling medium, such as water or air, in the condensation unit 300, releasing latent heat and condensing into liquid water.

[0091] Step 6: Condensate is discharged from the system through condensate outlet 600. Some of it can be recycled to maintain the system's water balance.

[0092] 4. Multi-effect series operation

[0093] Step 7: In a multi-effect system, a portion of the waste heat from the previous stage condensing unit is transferred through the medium outlet 500 to the medium inlet 400 of the next stage evaporating unit as a secondary heat source.

[0094] Step 8: The working fluid is flowed between the series evaporation units by gravity or pumping, and the exhaust steam pressure is increased step by step to realize the cascade utilization of thermal energy.

[0095] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A parallel ejector heat pump, characterized in that, include: The ejector (200) is arranged in parallel. The steam exhaust inlet (210) of the ejector (200) is connected to the exhaust outlet of the first evaporation unit (100). The mixed steam outlet (220) of the ejector (200) is connected to the first condensation unit (300).

2. The parallel ejector heat pump according to claim 1, characterized in that, The first evaporation unit (100) is provided with a waste steam outlet (110) that is connected to the waste steam inlet (210).

3. The parallel ejector heat pump according to claim 2, characterized in that, Multiple exhaust steam outlets (110) are arranged in a circular, matrix or random manner on the first evaporation unit (100).

4. The parallel ejector heat pump according to claim 1, characterized in that, The first condensation unit (300) is provided with a mixed steam inlet (310) that is connected to the mixed steam outlet (220).

5. The parallel ejector heat pump according to claim 4, characterized in that, Multiple mixing steam inlets (310) are arranged in a circular, matrix or random manner on the first condensing unit (300).

6. The parallel ejector heat pump according to claim 1, characterized in that, The first evaporation unit (100) is provided with a medium inlet (400) and a medium outlet (500).

7. The parallel ejector heat pump according to claim 1, characterized in that, The first evaporation unit (100) is equipped with a demister.

8. The parallel ejector heat pump according to claim 1, characterized in that, The first condensation unit (300) is provided with a condensate outlet (600).

9. A multi-effect parallel ejector heat pump, characterized in that, The parallel ejector heat pump includes any one of claims 1-8, wherein the first evaporation units (100) of the plurality of said parallel ejector heat pumps are connected in series.

10. The multi-effect parallel ejector heat pump according to claim 9, characterized in that, The media are transferred between adjacent first evaporation units (100) by gravity or by a pump.

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