A steam jet pump refrigeration system

Abstract

The application relates to the technical field of refrigeration systems, and discloses a steam jet pump refrigeration system which comprises a jet pump, a condenser, a throttle valve, a vapor-liquid separation liquid supply barrel, an evaporator, a constant-pressure water vapor circulation liquid supply tank, a circulating pump, a high-pressure steam generator, a check valve and a valve. The steam jet pump refrigeration system does not use a compressor in a common refrigeration system, but utilizes the self-suction of the jet pump, so that the energy consumption of the system is reduced; the vapor-liquid separation liquid supply barrel and the jet pump can timely return refrigerant steam from two-phase flow of the throttle valve and refrigerant steam generated by the evaporator to the condenser under the self-suction of the jet pump, on the one hand, the utilization rate of the refrigerant steam is improved, and on the other hand, the flow resistance caused by the refrigerant steam in the steam generator is avoided, and the heat exchange efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration systems, in particular to a steam jet pump refrigeration system. BACKGROUND

[0002] Jet refrigeration is to rely on the vaporization of liquid to refrigerate, which is completely the same as vapor compression and absorption refrigeration, but the difference is that the jet refrigeration system uses an ejector to extract the steam at the outlet of the evaporator and increases the pressure of the steam, so the jet refrigeration system has the characteristics of using heat energy as driving energy, simple structure, convenient operation and maintenance, etc. The jet refrigeration system generally consists of a generator, a condenser, an evaporator, an ejector, a circulating pump and a throttling valve, and has high practical value. The steam jet refrigeration system can use water, freon and the like as working medium.

[0003] In the jet steam refrigeration cycle, the pressure difference of the working medium in the condenser and the generator is large, and the pressure of the working medium in the generator is high. The traditional jet refrigeration system generally uses a circulating pump to pressurize the working medium, and when the ratio of the inlet and outlet pressures of the circulating pump is large, the working efficiency will be significantly reduced, resulting in a decrease in the energy efficiency ratio of the entire jet refrigeration system. Therefore, the Chinese patent CN205783970U discloses a method for reducing the pressure difference between the inlet and outlet of the circulating pump by installing a liquid storage container after the circulating pump, thereby improving the working efficiency of the circulating pump and efficiently and stably increasing the pressure of the working medium flowing out of the condenser to the pressure of the generator.

[0004] However, the steam in the two-phase flow of refrigerant passing through the throttling valve enters the evaporator and the circulating pump, that is, the flow resistance of the refrigerant in the evaporator is increased, and the working pressure of the circulating pump is also increased, so that the expansion work of this part of the steam is wasted. SUMMARY

[0005] (I) Technical problems solved

[0006] In view of the deficiencies of the prior art, the present application provides a steam jet pump refrigeration system.

[0007] (II) Technical solutions

[0008] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a steam jet pump refrigeration system, comprising a jet pump, a condenser, a throttling valve, a vapor-liquid separation liquid supply barrel, an evaporator, a stable pressure water vapor circulation liquid supply tank, a circulating pump, a high-pressure steam generator, a one-way valve and a valve.

[0009] The jet pump, the condenser, the throttling valve, the vapor-liquid separation liquid supply barrel, the evaporator, the stable pressure water vapor circulation liquid supply tank, the circulating pump and the high-pressure steam generator are sequentially connected end to end to form a main circulation loop.

[0010] The circulating pump, the valve, the vapor-liquid separation liquid supply barrel, the evaporator and the stable pressure water vapor circulation liquid supply tank are sequentially connected in a head-tail mode to form a secondary circulation loop.

[0011] By not using the compressor in the common refrigeration system and using the self-suction of the jet pump, the energy consumption of the system is reduced, and by using the vapor-liquid separation liquid supply barrel and the jet pump, the refrigerant vapor from the two-phase flow of the throttling valve and the refrigerant vapor generated in the evaporator can be directly returned to the condenser under the self-suction of the jet pump, which improves the utilization rate of the refrigerant vapor and avoids the flow resistance caused by the refrigerant vapor in the evaporator, thereby improving the heat exchange efficiency.

[0012] Preferably, the jet pump comprises a two-phase flow inlet, a steam inlet and an outlet, the stable pressure water vapor circulation liquid supply tank comprises an inlet, a liquid outlet and a steam outlet, and the steam outlet of the vapor-liquid separation liquid supply barrel is connected to the steam inlet of the jet pump through a one-way valve and the steam outlet of the stable pressure water vapor circulation liquid supply tank.

[0013] Preferably, the outlet of the circulating pump is connected to the high-pressure steam generator and the valve through a pipeline, respectively, and the valve is connected to the inlet of the vapor-liquid separation liquid supply barrel.

[0014] Preferably, the stable pressure water vapor circulation liquid supply tank is higher than the high-pressure steam generator and the vapor-liquid separation liquid supply barrel in the vertical direction.

[0015] Preferably, a filter is fixedly installed at the water outlet of the circulating pump, a partition plate is fixedly installed inside the filter, a through hole is formed in the partition plate, and a filter screen is fixedly installed inside the through hole, and a liquid inlet and a liquid outlet are arranged on the filter, so that the filter can filter the refrigerant and intercept impurities in the refrigerant, facilitating centralized cleaning.

[0016] Preferably, a cleaning mechanism is arranged at the bottom of the partition plate, the cleaning mechanism comprises a fixed block and a light rod, the light rod is fixedly installed on the fixed block, a cleaning plate is slidably connected to the light rod, and a spring is sleeved on the light rod, so that the filter screen can be prevented from being blocked.

[0017] Preferably, the right end of the spring abuts against the fixed block, the left end of the spring abuts against the cleaning plate, a guide hole is formed in the cleaning plate, the light rod penetrates the inside of the guide hole, and the fixed block is fixedly installed at the bottom of the partition plate, so that the cleaning plate can be guided and moved more stably.

[0018] Preferably, the upper surface of the cleaning plate is fixedly provided with a brush, and the bottom of the cleaning plate is fixedly provided with a push plate, and the upper surface of the brush is in contact with the bottom of the filter screen.

[0019] (III) Beneficial effects

[0020] Compared with the prior art, the steam jet pump refrigeration system has the following beneficial effects:

[0021] 1. The steam jet pump refrigeration system does not use a compressor in a common refrigeration system, but uses self-suction of the jet pump to reduce energy consumption of the system. The steam liquid separation liquid supply barrel and the jet pump can timely return refrigerant vapor in two-phase flow from a throttling valve and refrigerant vapor generated by an evaporator to a condenser under self-suction of the jet pump, thereby improving utilization rate of the refrigerant vapor and avoiding flow resistance caused by the refrigerant vapor in the evaporator, and improving heat exchange efficiency.

[0022] 2. The steam jet pump refrigeration system can realize multiple liquid supply of the evaporator through a secondary circulation loop, so that the efficiency of the evaporator is improved. The outlet pressure of the circulating pump is lower than that of a traditional refrigeration system through the secondary circulation loop, and the inlet and outlet pressure difference of the circulating pump is adjusted according to working conditions to reduce working resistance and energy consumption of the circulating pump.

[0023] 3. The steam jet pump refrigeration system is provided with a filter, and when refrigerant passes through the filter, impact force pushes the push plate to move along the polished rod, so that the brush on the cleaning plate cleans the filter screen, avoiding the phenomenon that impurities intercepted by the filter screen cause the filter screen to be blocked, and the filter can filter impurities in the recycled refrigerant. DETAILED DESCRIPTION

[0024] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application and explain the principles of the present application, and do not constitute a limitation of the present application. In the drawings:

[0025] Figure 1 It is a schematic diagram of the system of the present application;

[0026] Figure 2 It is a schematic diagram of the overall structure of the filter of the present application;

[0027] Figure 3 It is a schematic diagram of the cross-sectional structure of the filter of the present application;

[0028] Figure 4 It is a schematic diagram of the partition plate structure of the present application;

[0029] Figure 5This is a schematic diagram of the cleaning mechanism structure of the present invention.

[0030] In the diagram: 1. Jet pump; 2. Condenser; 3. Throttling valve; 4. Vapor-liquid separator supply tank; 5. Evaporator; 6. Pressure-stabilized water-vapor circulation supply tank; 7. Circulation pump; 8. High-pressure steam generator; 9. Check valve; 10. Valve; 11. Filter; 12. Inlet; 13. Outlet; 14. Baffle; 15. Filter screen; 16. Cleaning mechanism; 1601. Fixing block; 1602. Smooth rod; 1603. Spring; 1604. Cleaning plate; 1605. Guide hole; 1606. Brush; 1607. Push plate. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] Example 1

[0033] like Figure 1 As shown, the present invention provides a steam jet pump refrigeration system, including a jet pump 1, a condenser 2, a throttle valve 3, a vapor-liquid separation supply tank 4, an evaporator 5, a pressure-stabilizing water-vapor circulation supply tank 6, a circulation pump 7, a high-pressure steam generator 8, a one-way valve 9, and a valve 10.

[0034] The jet pump 1, condenser 2, throttle valve 3, vapor-liquid separator supply tank 4, evaporator 5, pressure-stabilizing water-vapor circulation supply tank 6, circulation pump 7 and high-pressure steam generator 8 are connected end to end to form the main circulation loop.

[0035] The circulating pump 7, valve 10, vapor-liquid separator supply tank 4, evaporator 5, and pressure-stabilizing water-vapor circulating supply tank 6 are connected end to end to form a secondary circulation loop.

[0036] The jet pump 1 includes a two-phase flow inlet, a steam inlet, and an outlet. The pressure-stabilized water-vapor circulation supply tank 6 includes an inlet, a liquid outlet, and a steam outlet. The steam outlet of the vapor-liquid separation supply tank 4 is connected to the steam inlet of the jet pump 1 via a one-way valve 9 and the steam outlet of the pressure-stabilized water-vapor circulation supply tank 6.

[0037] The outlet of the circulating pump 7 is connected to the high-pressure steam generator 8 and the valve 10 via pipelines. The valve 10 is connected to the inlet of the vapor-liquid separator supply tank 4.

[0038] The pressure-stabilizing water-vapor circulation supply tank 6 is vertically higher than the high-pressure steam generator 8 and the vapor-liquid separation supply tank 4.

[0039] In the embodiment, the energy consumption of the system is reduced by not using the compressor in the common refrigeration system and by using the self-suction of the jet pump 1, and the vapor refrigerant in the two-phase flow from the throttling valve 3 and the vapor refrigerant generated by the evaporator 5 can be directly returned to the condenser 2 under the self-suction of the jet pump 1 by using the vapor-liquid separation liquid supply barrel 4 and the jet pump 1, thereby improving the utilization rate of the vapor refrigerant and avoiding the flow resistance caused by the vapor refrigerant in the vaporizer, and improving the heat exchange efficiency, the secondary circulation loop can realize the double-quantity liquid supply of the evaporator 5, the efficiency of the evaporator 5 is improved, the outlet pressure of the circulating pump 7 is lower than that of the traditional refrigeration system through the secondary circulation loop, and the inlet and outlet pressure difference of the circulating pump 7 is adjusted according to the working condition to control the valve 10, thereby reducing the working resistance and energy consumption of the circulating pump 7.

[0040] Embodiment 2

[0041] As Figures 1-5 shown, on the basis of embodiment 1, the application provides a technical solution: a filter 11 is fixedly installed at the water outlet of the circulating pump 7, a partition plate 14 is fixedly installed inside the filter 11, a through hole is formed in the partition plate 14, a filter screen 15 is fixedly installed inside the through hole, a liquid inlet 12 is arranged on the filter 11, and a liquid outlet 13 is arranged on the filter 11, so that the filter 11 can filter the refrigerant, the impurities in the refrigerant are intercepted, and centralized cleaning is facilitated.

[0042] A cleaning mechanism 16 is arranged at the bottom of the partition plate 14, the cleaning mechanism 16 comprises a fixed block 1601 and a light rod 1602, the light rod 1602 is fixedly installed on the fixed block 1601, a cleaning plate 1604 is slidably connected to the light rod 1602, and a spring 1603 is sleeved on the light rod 1602, so that the filter screen 15 can be prevented from being blocked by the arrangement of the cleaning mechanism 16.

[0043] The right end of the spring 1603 abuts against the fixed block 1601, the left end of the spring 1603 abuts against the cleaning plate 1604, a guide hole 1605 is formed in the cleaning plate 1604, the light rod 1602 penetrates the inside of the guide hole 1605, and the fixed block 1601 is fixedly installed at the bottom of the partition plate 14, so that the light rod 1602 can guide the cleaning plate 1604 and make the cleaning plate 1604 more stable when moving.

[0044] A brush 1606 is fixedly installed on the upper surface of the cleaning plate 1604, a push plate 1607 is fixedly installed at the bottom of the cleaning plate 1604, and the upper surface of the brush 1606 is in contact with the bottom of the filter screen 15, so that the filter screen 15 can be cleaned by the brush 1606.

[0045] In this embodiment, when the refrigerant passes through the filter 11, the impact force pushes the push plate 1607 to move along the guide rod 1602, so that the brush 1606 on the cleaning plate 1604 cleans the filter screen 15, avoiding the phenomenon of filter screen 15 being blocked by impurities. The filter 11 can filter impurities for the refrigerant that is recycled.

[0046] The working principle of this steam jet pump refrigeration system will be explained in detail below.

[0047] like Figures 1-5 As shown, during operation, refrigerant from the pressure-stabilized water vapor circulation supply tank 6 is pressurized by the circulation pump 7 and sent to the high-pressure steam generator 8 and the vapor-liquid separation supply tank 4. Part of the refrigerant enters the high-pressure steam generator 8, generating high-temperature and high-pressure steam that enters the jet pump 1. The steam expands and accelerates in the nozzle, accompanied by a pressure drop. The low pressure formed at the nozzle outlet draws in the refrigerant vapor from the pressure-stabilized water vapor circulation supply tank 6 and the vapor-liquid separation supply tank 4 through the one-way valve 9. This part of the steam mixes with the high-speed vapor-liquid two-phase flow at the nozzle outlet, and is pressurized by the diffuser section of the jet pump 1 before entering the condenser. The condensed two-phase flow is throttled and depressurized by the throttling valve 3 before entering the vapor-liquid separation supply tank 4. The liquid refrigerant in the vapor-liquid separation supply tank 4 enters the evaporator 5 to evaporate, and the resulting two-phase flow enters the pressure-stabilized water vapor circulation supply tank 6. Another part of the refrigerant is used by the circulation pump 7 through the valve 10 to replenish the refrigerant in the vapor-liquid separation supply tank 4.

Claims

1. A steam jet pump refrigeration system, characterized in that, Includes jet pump (1), condenser (2), throttle valve (3), vapor-liquid separator supply tank (4), evaporator (5), pressure-stabilizing water-vapor circulation supply tank (6), circulation pump (7), high-pressure steam generator (8), check valve (9) and valve (10); The jet pump (1), condenser (2), throttle valve (3), vapor-liquid separator supply tank (4), evaporator (5), pressure-stabilizing water-vapor circulation supply tank (6), circulation pump (7) and high-pressure steam generator (8) are connected end to end to form the main circulation loop. The circulating pump (7), valve (10), vapor-liquid separation supply tank (4), evaporator (5) and pressure-stabilizing water vapor circulating supply tank (6) are connected end to end to form a secondary circulation loop; The jet pump (1) includes a two-phase flow inlet, a steam inlet and an outlet. The pressure-stabilized water vapor circulation supply tank (6) includes an inlet, a liquid outlet and a steam outlet. The steam outlet of the vapor-liquid separation supply tank (4) is connected to the steam inlet of the jet pump (1) via a one-way valve (9) and the steam outlet of the pressure-stabilized water vapor circulation supply tank (6).

2. The steam jet pump refrigeration system according to claim 1, characterized in that: The outlet of the circulating pump (7) is connected to the high-pressure steam generator (8) and the valve (10) via pipelines, and the valve (10) is connected to the inlet of the vapor-liquid separation supply tank (4).

3. The steam jet pump refrigeration system according to claim 2, characterized in that: The pressure-stabilizing water vapor circulation supply tank (6) is vertically higher than the high-pressure steam generator (8) and the vapor-liquid separation supply tank (4).

4. The steam jet pump refrigeration system according to claim 1, characterized in that: A filter (11) is fixedly installed at the outlet of the circulating pump (7). A partition (14) is fixedly installed inside the filter (11). An opening is provided on the partition (14). A filter screen (15) is fixedly installed inside the opening. An inlet (12) is provided on the filter (11). An outlet (13) is provided on the filter (11).

5. A steam jet pump refrigeration system according to claim 4, characterized in that: The bottom of the partition (14) is provided with a cleaning mechanism (16), which includes a fixing block (1601) and a light rod (1602). The light rod (1602) is fixedly installed on the fixing block (1601), and a cleaning plate (1604) is slidably connected to the light rod (1602). A spring (1603) is sleeved on the light rod (1602).

6. A steam jet pump refrigeration system according to claim 5, characterized in that: The right end of the spring (1603) abuts against the fixing block (1601), and the left end of the spring (1603) abuts against the cleaning plate (1604). The cleaning plate (1604) has a guide hole (1605), and the light rod (1602) passes through the interior of the guide hole (1605). The fixing block (1601) is fixedly installed at the bottom of the partition (14).

7. A steam jet pump refrigeration system according to claim 6, characterized in that: A brush (1606) is fixedly installed on the upper surface of the cleaning plate (1604), and a push plate (1607) is fixedly installed on the bottom of the cleaning plate (1604). The upper surface of the brush (1606) is in contact with the bottom of the filter screen (15).

Images