Refrigeration device using hybrid power compressor

Abstract

The present invention discloses a refrigeration device using a hybrid power compressor, the core of which is a hybrid power compressor, which uses a mixture of a low-temperature pressurized liquid working medium and a heat-increasing and pressurized gas working medium of the same natural substance as power to compress gas for refrigeration, wherein the gas working medium acts as a heat exchange working medium to output cold capacity and simultaneously obtain heat; the hybrid power compressor draws on the structural characteristics of a low-temperature piston liquid pump and a piston gas compressor, and adopts a structure of double-cylinder alternating drive and double-cylinder alternating compression; the power chamber that does work uses the kinetic energy from a nozzle and the potential energy generated after the gas-liquid mixture to do work, compressing the low-pressure gas working medium; the enthalpy value of the mixed working medium decreases and the humidity increases due to the work done; after the power chamber that does work is switched, it acts as a non-work power chamber, and the mixed working medium therein is discharged at reduced pressure, and after gas-liquid separation and supercooling, the liquid working medium is pressurized by a low-temperature liquid pump and continues to be used, and the low-pressure gas working medium is heated and pressurized by heat exchange and continues to be used; the low-pressure gas working medium outputs cold capacity for refrigeration.

Description

Technical Field

[0001] This patent application involves the technical fields of thermal power, refrigeration, etc., and is a technology that utilizes low-grade thermal energy for refrigeration. Background Art

[0002] Gas compression refrigeration is the most widely used refrigeration method with a high refrigeration performance coefficient. However, gas compression refrigeration requires the use of high-level energy such as electricity, and the energy consumption per unit cooling capacity is relatively large.

[0003] Other technologies that can utilize low-grade thermal energy for refrigeration generally have a low refrigeration performance coefficient, a relatively complex device composition, and a relatively high temperature of the available low-grade thermal energy. Summary of the invention

[0004] The purpose of this patent application is to utilize low-grade thermal energy close to the ambient temperature as the main energy source to reduce the energy consumption per unit of cooling capacity; to adopt relatively mature technology to make the device simple in composition and easy to manufacture; and to ensure that the circulating working fluid is safe, environmentally friendly and economical.

[0005] The core of this patent application is a hybrid compressor, which uses a mixture of a low-temperature pressurized liquid working fluid and a heat-increasing and pressurized gas working fluid of the same natural substance as power to compress gas for refrigeration, in which the gas working fluid acts as a heat exchange working fluid to output cold to the outside while obtaining heat; the hybrid compressor draws on the structural characteristics of a low-temperature piston liquid pump and a piston gas compressor, and adopts a structure of double-cylinder alternating drive and double-cylinder alternating compression; the power chamber that does work uses the kinetic energy from the nozzle and the potential energy generated after the gas-liquid mixture to do work, compressing the low-pressure gas working fluid; the enthalpy value of the mixed working fluid decreases and the humidity increases due to the work done; after the power chamber that does work is switched, it acts as a non-work power chamber, and the mixed working fluid therein is discharged at reduced pressure. After gas-liquid separation, the liquid working fluid is pressurized by a low-temperature liquid pump and continues to be used, and the low-pressure gas working fluid is heated and pressurized by heat exchange and continues to be used; the cold output of the low-pressure gas working fluid and the external heat exchange is used for refrigeration.

[0006] This patent application uses natural working fluids such as liquid air, liquid nitrogen, and a mixture of liquid oxygen and liquid nitrogen as circulating working fluids, and utilizes the temperature difference of nearly 200°C between the cryogenic temperature and the ambient temperature to enlarge the available temperature range of low-grade thermal energy; using electrical energy as auxiliary energy, low-grade thermal energy becomes the main energy source of the cycle, thereby reducing energy consumption per unit of cooling capacity.

[0007] The refrigeration device using a hybrid compressor of the present patent application comprises: a low-temperature liquid replenishing valve 01, a gas-liquid separator 02, a reflux valve 03, a first buffer tank charging valve 04, an air preheater 05, a first buffer tank 06, an air intake switching valve 07, a hybrid compressor 08, a hybrid compressor power side 08-1, a hybrid compressor compression side 08-2, an inlet switching valve 09, an exhaust liquid switching valve 10, a subcooler 11, a low-temperature liquid pump 12, a gas-liquid heat exchanger 14, a throttle valve 15, a second buffer tank 16, a refrigeration heat exchanger 18, a circulating cooling water device 20, a refrigeration user 21, and a main cold box 30.

[0008] The gas-liquid separator 02 is connected with the low-temperature liquid replenishing valve 01, the reflux valve 03, the low-temperature liquid pump 12, the exhaust liquid switching valve 10, and the throttle valve 15. The subcooler 11 is fixed in the middle of the gas-liquid separator 02. The subcooler 11 is connected with the refrigeration heat exchanger 18 and the throttle valve 15.

[0009] The reflux valve 03 is connected to the cryogenic liquid pump 12, the first buffer tank charging valve 04, and the gas-liquid heat exchanger 14. The gas-liquid heat exchanger 14 is connected to the liquid inlet switching valve 09, the first buffer tank 06, and the air inlet switching valve 07. The first buffer tank charging valve 04 is connected to the first buffer tank 06 via the air preheater 05. The liquid inlet switching valve 09 is connected to the power side 08-1 of the hybrid compressor. The air inlet switching valve 07 is connected to the power side 08-1 of the hybrid compressor.

[0010] The power side 08-1 of the hybrid compressor is connected to the gas-liquid separator 02 via the exhaust liquid switching valve 10. The power side 08-1 of the hybrid compressor 08 is connected to the compression side 08-2 of the hybrid compressor in an adiabatic manner. The compression side 08-2 of the hybrid compressor is connected to the first buffer tank 06, the second buffer tank 16, and the circulating cooling water device 20.

[0011] The refrigeration heat exchanger 18 is connected to the refrigeration user 21 and the second buffer tank 16.

[0012] The gas-liquid separator 02, the reflux valve 03, the first buffer tank charging valve 04, the air intake switching valve 07, the hybrid compressor power side 08-1, the liquid intake switching valve 09, the exhaust liquid switching valve 10, the low-temperature liquid pump 12, the gas-liquid heat exchanger 14, the throttle valve 15, and the refrigeration heat exchanger 18 are fixed in the main cold box 30.

[0013] The hybrid compressor includes: an insulating cover 001, a power side casing 002, a power side free cavity 003, a left power cavity 004, a right power cavity 005, a power cavity piston 006, a gas-liquid ejector 007, an insulating takeover 008, a low-temperature shaft 009, a low-temperature shaft seal 010, a low-temperature piston ring 011, a left cylinder discharge pipe 012, a right cylinder discharge pipe 013, a nozzle 014, a left cylinder liquid inlet pipe 015, a left cylinder air inlet pipe 016, a right cylinder liquid inlet pipe 017, and a right cylinder air inlet pipe 01 8. Normal temperature shaft 030, compression side casing 031, left compression chamber 032, right compression chamber 033, compression side free chamber 034, left compression chamber intake valve 035, left compression chamber exhaust valve 036, right compression chamber intake valve 037, right compression chamber exhaust valve 038, compression chamber piston 039, compression chamber piston ring 040, compression chamber shaft seal 041, insulation pad 050, middle free chamber 051, cooling water jacket 053, cooling water inlet pipe 055, cooling water drain pipe 056,

[0014] The power side casing 002 is connected to the compression side casing 031 through the insulation pad 050 and the shaft, and the insulation cover 001 is connected to the compression side casing 031.

[0015] The power side free cavity 003, the left power cavity 004, the right power cavity 005, and the middle free cavity 051 are connected to the low temperature shaft 009 through the power side casing 002, the power cavity piston 006 is connected to the low temperature shaft 009, and the power cavity piston 006 is connected to the power side casing 002 through the low temperature piston ring 011.

[0016] The low temperature shaft 009 and the normal temperature shaft 030 are connected through the heat-insulating joint 008. The low temperature shaft 009 is connected to the power side casing 002 through the low temperature shaft seal 010. The normal temperature shaft 030 is connected to the compression side casing 031 through the compression chamber shaft seal 041.

[0017] The middle free chamber 051 is connected to the left compression chamber 032, the right compression chamber 033, and the compression side free chamber 034 through the normal temperature shaft 030. The left compression chamber 032, the right compression chamber 033, and the compression side free chamber 034 are connected to the compression side casing 031. The compression chamber piston 039 is connected to the compression side casing 031 through the compression chamber piston ring 040. The compression chamber piston 039 is connected to the normal temperature shaft 030.

[0018] The left compression chamber intake valve 035, the left compression chamber exhaust valve 036, the right compression chamber intake valve 037, and the right compression chamber exhaust valve 038 are connected to the compression side casing 031, the left compression chamber intake valve 035 and the left compression chamber exhaust valve 036 are connected to the left compression chamber 032, and the right compression chamber intake valve 037 and the right compression chamber exhaust valve 038 are connected to the right compression chamber 033.

[0019] The left cylinder discharge pipe 012 is connected to the left power chamber 004, the right cylinder discharge pipe 013 is connected to the right power chamber 005, the nozzle 014 is connected to the left power chamber 004 and the right power chamber 005, the nozzle 014 is connected to the gas-liquid injector 007, the left cylinder liquid inlet pipe 015 and the left cylinder air inlet pipe 016 are connected to the gas-liquid injector 007 on the left side, the right cylinder liquid inlet pipe 017 and the right cylinder air inlet pipe 018 are connected to the gas-liquid injector 007 on the right side,

[0020] The cooling water jacket 053 is connected to the compression side casing 031 , the cooling water inlet pipe 055 , and the cooling water outlet pipe 056 . BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Attached Figure 1 This is a schematic diagram of the process flow of this patent application. The devices and components of the marked parts in the figure are: low-temperature liquid replenishing valve 01, gas-liquid separator 02, reflux valve 03, first buffer tank charging valve 04, air preheater 05, first buffer tank 06, air intake switching valve 07, hybrid compressor 08, hybrid compressor power side 08-1, hybrid compressor compression side 08-2, liquid intake switching valve 09, exhaust liquid switching valve 10, subcooler 11, low-temperature liquid pump 12, gas-liquid heat exchanger 14, throttle valve 15, second buffer tank 16, refrigeration heat exchanger 18, circulating cooling water device 20, refrigeration user 21, main cold box 30.

[0022] Attached Figure 2 It is a schematic diagram of the structure of a hybrid compressor. The devices and components of the marked parts in the figure are: insulation cover 001, power side casing 002, power side free cavity 003, left power cavity 004, right power cavity 005, power cavity piston 006, gas-liquid ejector 007, insulation takeover 008, low temperature shaft 009, low temperature shaft seal 010, low temperature piston ring 011, left cylinder discharge pipe 012, right cylinder discharge pipe 013, nozzle 014, left cylinder liquid inlet pipe 015, left cylinder air inlet pipe 016, right cylinder liquid inlet pipe 017, right cylinder intake pipe 018, normal temperature shaft 030, compression side casing 031, left compression chamber 032, right compression chamber 033, compression side free chamber 034, left compression chamber intake valve 035, left compression chamber exhaust valve 036, right compression chamber intake valve 037, right compression chamber exhaust valve 038, compression chamber piston 039, compression chamber piston ring 040, compression chamber shaft seal 041, insulation pad 050, middle free chamber 051, cooling water jacket 053, cooling water inlet pipe 055, cooling water drain pipe 056.

[0023] Attached Figure 3Schematic diagram of temperature entropy of the process flow, the nodes of the marked parts in the figure are: inlet 111 of cryogenic liquid pump 12, outlet 112 of cryogenic liquid pump 12, inlet 113 of working fluid of gas-liquid ejector 007, low-pressure zone 114 of working fluid of gas-liquid ejector 007, mixing zone 115 of gas-liquid ejector 007, outlet 116 of gas-liquid ejector 007, working power chamber 117, outlet 118 of gas-liquid discharge pipe of gas-liquid separator 02, outlet 119 of throttle valve 15, outlet 120 of subcooler 11, outlet 121 of refrigeration heat exchanger 18, exhaust 122 of compression side 08-2 of hybrid compressor, inlet 123 of induced fluid of gas-liquid ejector 007, low-pressure zone 124 of induced fluid of gas-liquid ejector 007. DETAILED DESCRIPTION

[0024] In combination with the technical solutions and drawings in this patent application, the specific implementation method is described by taking the circulating working medium as liquid air as an example.

[0025] Attached Figure 1 , Attachment Figure 2 In the process, the external liquid air is sent into the gas-liquid separator 02 through the low-temperature liquid replenishing valve 01; the circulating cooling water device 20 and the refrigeration user 21 are turned on; the reflux valve 03 and the first buffer tank charging valve 04 are opened, and the first buffer tank 06 is pre-charged through the air preheater 05; the throttle valve 15 is opened to pre-charge the second buffer tank 16; the liquid inlet switching valve 09, the air inlet switching valve 07, and the exhaust liquid switching valve 10 are operated to alternately pre-cool the power cavity and related pipelines of the hybrid compressor 08.

[0026] Attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 In the process, the liquid air is pressurized by the cryogenic liquid pump 12, and the working point is increased from the adjacent Figure 3 The cryogenic liquid pump 12 inlet 111 in the working point reaches the cryogenic liquid pump 12 outlet 112; the gas-liquid heat exchanger 14 exchanges heat with the gas working medium from the first buffer tank 06, and the working point reaches the adjacent Figure 3 The gas-liquid ejector 007 working fluid inlet 113 point; through the gas-liquid ejector 007 working fluid low pressure area 114 point, and the ejection fluid successively through the gas-liquid ejector 007 ejection fluid inlet 123 point, the gas-liquid ejector 007 ejection fluid low pressure area 124 point mixed, to reach the adjacent Figure 3 The mixed fluid reaches the gas-liquid ejector 007 at the outlet of the gas-liquid ejector 007 at point 115; the mixed fluid has a reduced velocity and a increased pressure at the outlet of the gas-liquid ejector 007. Figure 3 The gas-liquid ejector 007 in the right power chamber 005 enters the right power chamber 005 through the nozzle 014, pushing the power chamber piston 006 to move leftward, compressing the low-pressure gas working medium pre-filled in the left compression chamber 032, and the working point is from the adjacent Figure 3The outlet 116 of the gas-liquid ejector 007 in the working chamber reaches the working chamber 117, and the kinetic energy and potential energy in the power chamber are converted into pressure potential energy and thermal energy in the compression chamber. The enthalpy of the working medium in the power chamber is reduced, the humidity is increased, and the density is increased; the dual power chambers of the hybrid compressor 08 are alternately driven, and the dual compression chambers are alternately compressed; the working medium in the non-working power chamber is depressurized and discharged to the gas-liquid separator 02 through the exhaust liquid switching valve 10, and the working point is changed from the adjacent Figure 3 The middle working power chamber 117 reaches the gas-liquid discharge pipe outlet 118 of the gas-liquid separator 02.

[0027] Attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 In the process, after the working fluid in the upper part of the gas-liquid separator 02 is depressurized by the throttle valve 15, the working point reaches the adjacent Figure 3 The throttle valve 15 in the outlet 119; the low-pressure and low-temperature working fluid after throttling enters the subcooler 11, and exchanges heat with the working fluid in the lower part of the gas-liquid separator 02, and the working point reaches the adjacent Figure 3 The outlet of the subcooler 11 is 120; the low-pressure and low-temperature working fluid exchanges heat with the refrigeration user 21 through the refrigeration heat exchanger 18, outputs cold capacity, absorbs heat, and reaches the working point nearby Figure 3 The air is sucked into the non-compressed chamber through the second buffer tank 16 and the left compression chamber intake valve 035 or the right compression chamber intake valve 037 of the hybrid power compressor 08; under the alternate driving of the left power chamber 004 or the right power chamber 005 of the hybrid power compressor 08, the left compression chamber 032 or the right compression chamber 033 alternately inhales and compresses, and the working point reaches the adjacent Figure 3 The compressed gas enters the first buffer tank 06 through the left compression chamber intake valve 035 or the left compression chamber exhaust valve 036, and then enters the gas-liquid ejector 007 in the left power chamber 004 or the right power chamber 005 of the hybrid power compressor power side 08-1 through the intake switching valve 07 after heat exchange with the liquid pressurized by the cryogenic liquid pump 12 through the gas-liquid heat exchanger 14, and then enters the gas-liquid ejector 007 in the left power chamber 004 or the right power chamber 005 of the hybrid power compressor power side 08-1, and the working point reaches the adjacent Figure 3 The gas-liquid injector 007 injects fluid at the inlet point 123 .

[0028] Attached Figure 1 In, attached Figure 2 , Attachment Figure 3 In the gas-liquid separator 02, part of the mixed working medium releases the latent heat of condensation and condenses, and part of it absorbs the latent heat of evaporation and evaporates; the humid gas is cooled and depressurized by the throttle valve 15, and then passes through the cooler 11 to exchange heat with the mixed working medium and the liquid working medium to accelerate the gas-liquid separation. The humid gas goes to the top of the gas-liquid separator 02, and the liquid goes to the middle and lower part of the gas-liquid separator 02; the liquid working medium is cooled from the surrounding by the supercooling working point Figure 3The gas-liquid separator 02 has a gas-liquid discharge pipe outlet 118 and a cryogenic liquid pump 12 inlet 111; under the simultaneous action of the liquid level height, the subcooling degree of the cryogenic liquid pump 12 inlet is ensured to reduce the impact of cavitation on the liquid pump.

[0029] Attached Figure 1 In, attached Figure 2 In the embodiment, the main cold box 3 adopts a box-type insulation structure and is filled with insulation materials such as pearl sand. The cold box is filled with inert gas to maintain positive pressure to prevent moisture from penetrating and affecting the insulation effect. The insulation cover 001 of the hybrid compressor 08 is independently set and filled with insulation materials such as pearl sand. It can also be wrapped with insulation materials instead of the cold box insulation. The first buffer tank 06 is wrapped with insulation materials for insulation.

[0030] Attached Figure 1 In the present application, different refrigeration users can be regarded as different heat sources. In order to reduce the gas-liquid ratio, the temperature of the heat source can be appropriately increased.

[0031] Attached Figure 1 In, attached Figure 2 In the figure, the cooling water jacket 053 of the compression side 08-2 of the hybrid compressor is used to slow down the temperature rise of the compression chamber piston ring 040, and the circulating cooling water device 20 realizes closed-loop circulation through the cooling water inlet pipe 055, the cooling water jacket 053, and the cooling water discharge pipe 056.

Claims

1. A refrigeration device using a hybrid compressor, characterized in that: The refrigeration device comprises: a low-temperature liquid replenishing valve (01), a gas-liquid separator (02), a reflux valve (03), a first buffer tank charging valve (04), an air preheater (05), a first buffer tank (06), an air intake switching valve (07), a hybrid power compressor (08), a hybrid power compressor power side (08-1), a hybrid power compressor compression side (08-2), a liquid intake switching valve (09), an exhaust liquid switching valve (10), a subcooler (11), a low-temperature liquid pump (12), a gas-liquid heat exchanger (14), a throttle valve (15), a second buffer tank (16), a refrigeration heat exchanger (18), a circulating cooling water device (20), a refrigeration user (21), and a main cold box (30). The gas-liquid separator (02) is connected to the low-temperature liquid replenishing valve (01), the reflux valve (03), the low-temperature liquid pump (12), the exhaust liquid switching valve (10), and the throttle valve (15). The subcooler (11) is fixed in the middle of the gas-liquid separator (02). The subcooler (11) is connected to the refrigeration heat exchanger (18) and the throttle valve (15). The reflux valve (03) is in communication with the cryogenic liquid pump (12), the first buffer tank charging valve (04), and the gas-liquid heat exchanger (14); the gas-liquid heat exchanger (14) is in communication with the liquid inlet switching valve (09), the first buffer tank (06), and the air inlet switching valve (07); the first buffer tank charging valve (04) is in communication with the first buffer tank (06) via the air preheater (05); the liquid inlet switching valve (09) is in communication with the power side (08-1) of the hybrid power compressor; the air inlet switching valve (07) is in communication with the power side (08-1) of the hybrid power compressor; The power side (08-1) of the hybrid compressor is connected to the gas-liquid separator (02) via the exhaust liquid switching valve (10); the power side (08-1) of the hybrid compressor (08) is connected to the compression side (08-2) of the hybrid compressor by an adiabatic shaft; the compression side (08-2) of the hybrid compressor is connected to the first buffer tank (06), the second buffer tank (16), and the circulating cooling water device (20); The refrigeration heat exchanger (18) is in communication with the refrigeration user (21) and the second buffer tank (16). A gas-liquid separator (02), a reflux valve (03), a first buffer tank charging valve (04), an air intake switching valve (07), a hybrid compressor power side (08-1), a liquid intake switching valve (09), an exhaust liquid switching valve (10), a cryogenic liquid pump (12), a gas-liquid heat exchanger (14), a throttle valve (15), and a refrigeration heat exchanger (18) are fixed in a main cold box (30).

2. A refrigeration device using a hybrid power compressor according to claim 1, characterized in that: The hybrid power compressor (08) comprises: an insulating cover (001), a power side casing (002), a power side free chamber (003), a left power chamber (004), a right power chamber (005), a power chamber piston (006), a gas-liquid ejector (007), an insulating takeover (008), a low temperature shaft (009), a low temperature shaft seal (010), a low temperature piston ring (011), a left cylinder discharge pipe (012), a right cylinder discharge pipe (013), a nozzle (014), a left cylinder liquid inlet pipe (015), a left cylinder air inlet pipe (016), a right cylinder liquid inlet pipe (017), and a right cylinder air inlet pipe (018). 018), normal temperature shaft (030), compression side casing (031), left compression chamber (032), right compression chamber (033), compression side free chamber (034), left compression chamber intake valve (035), left compression chamber exhaust valve (036), right compression chamber intake valve (037), right compression chamber exhaust valve (038), compression chamber piston (039), compression chamber piston ring (040), compression chamber shaft seal (041), insulation pad (050), middle free chamber (051), cooling water jacket (053), cooling water inlet pipe (055), cooling water drain pipe (056), The power side casing (002) is connected to the compression side casing (031) via a heat insulating pad (050) and a shaft, and the heat insulating cover (001) is connected to the compression side casing (031). The power side free chamber (003), the left power chamber (004), the right power chamber (005), and the middle free chamber (051) are connected via the power side casing (002) and the low temperature shaft (009); the power chamber piston (006) is connected to the low temperature shaft (009); the power chamber piston (006) is connected to the power side casing (002) via the low temperature piston ring (011); The low temperature shaft (009) and the normal temperature shaft (030) are connected via a heat-insulating joint (008). The low temperature shaft (009) is connected to the power side casing (002) via a low temperature shaft seal (010). The normal temperature shaft (030) is connected to the compression side casing (031) via a compression chamber shaft seal (041). The middle free chamber (051) is connected to the left compression chamber (032), the right compression chamber (033), and the compression side free chamber (034) via a normal temperature shaft (030); the left compression chamber (032), the right compression chamber (033), and the compression side free chamber (034) are connected to the compression side casing (031); the compression chamber piston (039) is connected to the compression side casing (031) via a compression chamber piston ring (040); and the compression chamber piston (039) is connected to the normal temperature shaft (030). The left compression chamber intake valve (035), the left compression chamber exhaust valve (036), the right compression chamber intake valve (037), and the right compression chamber exhaust valve (038) are connected to the compression side casing (031); the left compression chamber intake valve (035) and the left compression chamber exhaust valve (036) are in communication with the left compression chamber (032); the right compression chamber intake valve (037) and the right compression chamber exhaust valve (038) are in communication with the right compression chamber (033); The left cylinder discharge pipe (012) is in communication with the left power chamber (004), the right cylinder discharge pipe (013) is in communication with the right power chamber (005), the nozzle (014) is in communication with the left power chamber (004) and the right power chamber (005), the nozzle (014) is in communication with the gas-liquid injector (007), the left cylinder liquid inlet pipe (015) and the left cylinder air inlet pipe (016) are in communication with the gas-liquid injector (007) on the left side, the right cylinder liquid inlet pipe (017) and the right cylinder air inlet pipe (018) are in communication with the gas-liquid injector (007) on the right side, The cooling water jacket (053) is in communication with the compression side casing (031), the cooling water inlet pipe (055), and the cooling water outlet pipe (056).

3. A refrigeration device using a hybrid power compressor according to claim 1 or 2, characterized in that: The hybrid power compressor (08) adopts a structure of double-cylinder alternate driving and double-cylinder alternate compression.

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