A cold energy air conditioner with global application

Abstract

The present application relates to a cold energy air conditioner with full-range application, which belongs to the technical field of automotive cold energy air conditioners, and includes a cold energy recovery mechanism, a cold extraction mechanism, a cold supplement mechanism and a refrigeration mechanism for cooling the cab, the cold energy recovery mechanism is connected to the LNG gas cylinder, the cold extraction mechanism includes a cold extraction device and a cold storage medium arranged in the cold extraction device, the cold energy recovery mechanism and the refrigeration mechanism are respectively provided with heat exchange with the cold storage medium, the cold supplement mechanism is provided with heat exchange with the refrigeration mechanism through the cold supplement heat exchanger, and also includes a measurement and control system, the measurement and control system is used to monitor the temperature of the above-mentioned mechanisms and control the operation of the above-mentioned mechanisms. The present application is hierarchically set through the measurement and control system: first, ensure that the cold energy recovery mechanism fully utilizes the LNG cold energy and quickly cools down under the maximum cooling state; secondly, the cold extraction mechanism is turned on under the maximum cooling and parking state; finally, under the condition of insufficient cold energy supply in individual working conditions, the cold supplement mechanism is turned on to ensure the full-range application of the cold energy air conditioner, which has the characteristics of energy saving and emission reduction and controllable cooling effect.

Description

Technical Field

[0001] The present application relates to the field of vehicle cold energy air conditioners, and in particular to a cold energy air conditioner with full-area application. Background Art

[0002] With the in-depth transformation of my country's energy consumption structure, LNG, as a clean energy, has made great progress and is widely used in various fields due to its advantages such as high calorific value, low price, low pollution after combustion and environmental friendliness. As a fuel, LNG is safe, efficient, clean and pollution-free, which not only promotes the transformation of my country's energy structure, but also effectively reduces the environmental pollution caused by combustion exhaust emissions.

[0003] LNG as automobile fuel is only one important aspect of its many application fields. It has good social and economic benefits and has a good development prospect. LNG, or liquefied natural gas, is stored in LNG cylinders. When in use, the automobile engine needs gaseous natural gas. The process from liquid to gas is inevitably accompanied by a heat exchange process, which releases a large amount of cold. But under normal circumstances, this part of the cold is usually discarded in the LNG vaporizer, which not only causes a lot of energy waste, but also causes cold pollution. Recycling this part of cold energy and effectively utilizing energy can also reduce a lot of electricity consumption, which has considerable economic and social benefits.

[0004] LNG cold energy recovery is an important aspect of its application in the automotive field. At present, there is no mature LNG cold energy utilization system for heavy trucks in the domestic market. There are only studies on cold energy air conditioners for automobiles, such as an LNG air conditioning refrigeration system disclosed in patent number CN110802996A. The cold energy air conditioner described in this refrigeration system still has the problem of insufficient cold energy supply under certain working conditions. Utility Model Content

[0005] In order to improve the problem of insufficient LNG cold energy supply and enhance the stability and comfort of refrigeration, the present application provides a cold energy air conditioner with full-area application.

[0006] The present application provides a global application cold energy air conditioner, which adopts the following technical solution:

[0007] A cold energy air conditioner for full-area application includes a cold energy recovery mechanism, a cold extraction mechanism, a cold supplement mechanism and a refrigeration mechanism for cooling a cab, wherein the cold energy recovery mechanism is connected to an LNG gas cylinder, the cold extraction mechanism includes a cold extraction device and a cold storage medium arranged in the cold extraction device, the cold energy recovery mechanism and the refrigeration mechanism are respectively arranged for heat exchange with the cold storage medium, the cold supplement mechanism is arranged for heat exchange with the refrigeration mechanism via a cold supplement heat exchanger, and also includes a measurement and control system, wherein the measurement and control system is used to monitor the temperature of the above-mentioned mechanisms and control the operation of the above-mentioned mechanisms.

[0008] By adopting the above technical solution, this application sets the workflow sequence of the cold energy air conditioner through the measurement and control system: first, ensure that the refrigeration mechanism utilizes LNG cold energy through the cold energy recovery mechanism as much as possible, and achieves rapid cooling in three ways under the maximum cooling state; second, turn on the cold extraction mechanism under the maximum cooling and parking state; finally, turn on the cold supplement mechanism under the condition of insufficient cold energy supply in some working conditions to ensure the full application of the cold energy air conditioner. The application of this cold energy air conditioner achieves three goals in one stroke: it creates a comfortable and stable working environment for drivers and passengers, creates conditions for safe driving; it can also reduce energy consumption and create economic value for end customers; it can also reduce carbon emissions and contribute to environmental protection.

[0009] Optionally, a second circulation pump is provided in the refrigeration device, and an active refrigeration circuit is provided at the output end of the second circulation pump. The output end of the active refrigeration circuit is connected to the interior of the refrigeration device. A built-in heat exchange pipe is provided on the active refrigeration circuit, and the built-in heat exchange pipe is arranged in the interlayer of the LNG gas cylinder.

[0010] By adopting the above technical solution, when actively taking cold, the second circulation pump is started to drive the cold storage medium to circulate in the active cold taking circuit. Since the LNG cylinder stores a large amount of cold energy, the cold storage medium exchanges heat with the LNG in the LNG cylinder through the built-in heat exchange pipe. Therefore, when the engine is stopped, the cold taker can still draw cold energy from the liquid LNG, ensuring that the cold energy air conditioner can perform cooling operation and has the function of micro-power circulation refrigeration.

[0011] Optionally, the supplementary cooling mechanism includes a supplementary cooling circuit, in which a supplementary cooling medium flows, and the supplementary cooling circuit is connected to one side of the supplementary cooling heat exchanger, and a gas-liquid separator, a compressor, a condenser and a throttling element are arranged in sequence on the supplementary cooling circuit.

[0012] Optionally, the refrigeration mechanism includes a refrigeration circuit and a first circulation pump, a cold core and an expansion tank arranged on the refrigeration circuit, a refrigerant flows in the refrigeration circuit, a first heat exchange tube is provided on the refrigeration circuit, the first heat exchange tube is arranged in the liquid phase space of the cooler, and the first circulation pump and the cold core are arranged on the outside of the cooler.

[0013] By adopting the above technical solution, when the refrigeration mechanism is in working state, the first circulating pump is started, the refrigerant exchanges heat with the cold storage medium in the first heat exchange tube, absorbs the cold energy of the cold storage medium, and driven by the first circulating pump, the refrigerant circulates in the refrigeration circuit and releases the cold energy into the cab through the cold core, thereby realizing air conditioning refrigeration of the cab.

[0014] Optionally, the refrigeration circuit is connected to a side of a supplementary cooling heat exchanger away from the supplementary cooling mechanism, and the supplementary cooling heat exchanger is arranged between the first heat exchange pipe and the first circulation pump.

[0015] By adopting the above technical scheme, the supplementary cooling mechanism is set to exchange heat with the refrigeration mechanism through the supplementary cooling heat exchanger. The supplementary cooling mechanism directly exchanges heat with the refrigeration mechanism to supplement the cooling capacity of the refrigeration mechanism. The response speed of the supplementary cooling is fast, thereby ensuring the timeliness of the supplementary cooling.

[0016] Optionally, the cold energy recovery mechanism includes a cold supply channel and a second heat exchange tube arranged on the cold supply channel, the cold supply channel passes through the cold taker and the second heat exchange tube is arranged in the cold taker, one end of the cold supply channel is connected to the LNG cylinder, and the other end is connected to the air intake of the engine.

[0017] By adopting the above technical solution, the LNG output from the LNG cylinder enters the cooling channel, and the LNG exchanges heat with the cold storage medium in the cooler through the second heat exchange tube. The LNG absorbs heat and vaporizes, which is beneficial to the stable gas supply of the engine. At the same time, the cooler stores the cold energy of the LNG to realize the recovery of the cold energy of the LNG.

[0018] Optionally, a gas channel is provided on the outside of the cooler, one end of the gas channel and one end of the cooling channel are connected to the output end of the LNG cylinder through a three-way pipe, and the other end of the gas channel and the other end of the cooling channel are connected to the air inlet of the engine through a three-way valve. A water bath heat exchanger is provided on the gas channel, and the water inlet end of the water bath heat exchanger is connected to the cylinder liner cooling water outlet of the engine, and the water outlet end is connected to the cylinder liner cooling water inlet of the engine.

[0019] By adopting the above technical solution, the LNG output from the LNG cylinder can be controlled to pass through the cooling channel or the gas channel by controlling the opening and closing of the valve port of the three-way valve. In summer, the LNG output from the LNG cylinder passes through the cooling channel, and the LNG exchanges heat with the cold storage medium in the cooler in the cooling channel. The cooler stores the cold energy of the LNG to realize the recovery of the cold energy of the LNG. In winter, when the cold energy air conditioner is not needed for refrigeration, the LNG output from the LNG cylinder passes through the gas channel, which is conducive to the vaporization of LNG through the water bath heat exchanger, realizes the gas supply to the engine, and ensures the normal operation of the engine. In summer, the cooling channel replaces the gas channel to ensure the supply of cold. In addition, the hot water of the water bath heat exchanger uses the cylinder jacket cooling water of the engine, which not only ensures the circulation of the engine cylinder jacket cooling water to avoid damage due to excessive temperature of the engine, but also realizes the recovery of waste heat from the engine and promotes the vaporization of LNG.

[0020] Optionally, an external heat exchanger is provided between the cold supply channel and the refrigeration circuit, one side input end of the external heat exchanger is connected to the output end of the cold core, the output end is connected to the input end of the first heat exchange tube, the other side input end of the external heat exchanger is connected to the output end of the second heat exchange tube, and the output end is connected to the three-way valve.

[0021] By adopting the above technical solution, the temperature of LNG is still below 0°C after the cold energy is recovered by the cooler. The external heat exchanger allows the LNG to exchange heat with the refrigerant in the refrigeration circuit. On the one hand, the cold energy loss is further reduced and the refrigerant can be pre-cooled before entering the first heat exchange tube, thereby improving the refrigeration efficiency of the refrigeration mechanism. On the other hand, the vaporization degree of LNG passing through the external heat exchanger is further improved, which is conducive to achieving stable air supply to the engine.

[0022] Optionally, it also includes a control system, which is respectively connected to the second circulation pump, the cooling mechanism and the three-way valve signal.

[0023] By adopting the above technical solution, when cold energy recovery is required, the control system controls the opening and closing of the valve port of the three-way valve, so that LNG is supplied to the engine from the cold supply channel. At this time, the cold energy of the LNG is recovered by the cold extractor. When active cold extraction is required, the control system controls the second circulation pump to start. At this time, the active cold extraction circuit is a passage as a whole, and the cold energy air conditioner is in a micro-power cold extraction state; when the cold amount in the cold extractor still does not meet the demand after active cold extraction, the control system controls the cold supplement mechanism to start. At this time, the cold energy air conditioner is in a cold supplement state.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. This application sets the workflow sequence of cold energy air conditioners through the measurement and control system: first, ensure that the refrigeration mechanism fully utilizes the LNG cold energy through the cold energy recovery mechanism as much as possible, and achieves rapid cooling by taking three measures under the maximum cooling state; second, turn on the cold extraction mechanism under the maximum cooling and parking state; finally, turn on the supplementary cooling mechanism under the condition of insufficient cold energy supply in some working conditions to ensure the full application of cold energy air conditioners. The cold energy recovery mechanism, the cold extraction mechanism, and the supplementary cooling mechanism are controlled in stages through the measurement and control system, achieving three goals at one stroke: creating a comfortable and stable working environment for drivers and passengers and creating conditions for safe driving; reducing energy consumption and creating economic value for end customers; and reducing carbon emissions and contributing to environmental protection.

[0026] 2. After the cold energy of LNG is recovered by the cooler, the temperature is still below 0℃. The LNG is exchanged with the refrigerant in the refrigeration circuit through the external heat exchanger. On the one hand, the cold energy loss is further reduced and the refrigerant can be pre-cooled before entering the first heat exchange tube, thereby improving the refrigeration efficiency of the cold energy air conditioner. On the other hand, the vaporization degree of LNG passing through the external heat exchanger is further improved, which is conducive to achieving stable gas supply to the engine.

[0027] 3. Through the arrangement of the second circulation pump, the active cooling circuit and the built-in heat exchange pipe, when active cooling is required in the parking state, the second circulation pump is started to drive the cold storage medium to circulate in the active cooling circuit. Since the LNG cylinder stores a large amount of cold energy, the cold storage medium exchanges heat with the LNG in the LNG cylinder through the built-in heat exchange pipe. Therefore, when the engine stops, that is, there is no LNG input in the cooling channel, the cooler can still draw cold energy from the liquid LNG, ensuring that the cold energy air conditioner can perform cooling operation. It has the function of micro-power circulation refrigeration, so that the cold energy air conditioner can be applied in the whole range under multiple working conditions.

[0028] 4. The supplementary cooling mechanism in the present application directly exchanges heat with the refrigeration mechanism to supplement the cooling capacity of the refrigeration mechanism. The response speed of the supplementary cooling is relatively fast, thereby ensuring the timeliness of the supplementary cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present application, wherein the cooling supplement mechanism 3 adopts the front series mode.

[0030] Figure 2 It is a schematic diagram of the overall structure of the second embodiment of the present application, wherein the cooling supplement mechanism 3 adopts a post-series mode.

[0031] Explanation of the reference numerals in the accompanying drawings: 1. cold energy recovery mechanism; 11. cold supply channel; 12. second heat exchange tube; 2. cold extraction mechanism; 21. cold extractor; 22. cold storage medium; 23. second circulation pump; 24. active cold extraction circuit; 3. cold supplement mechanism; 31. cold supplement circuit; 32. gas-liquid separator; 33. compressor; 34. condenser; 35. throttling element; 36. liquid storage tank; 4. refrigeration mechanism; 41. refrigeration circuit; 42. first circulation pump; 43. cold core; 44. expansion tank; 45. first heat exchange tube; 5. LNG cylinder; 51. gas channel; 511. water bath heat exchanger; 52. three-way pipe; 53. built-in heat exchange tube; 6. cold supplement heat exchanger; 7. measurement and control system; 8. engine; 81. three-way valve; 9. external heat exchanger. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-2 , further details of this application are given.

[0033] Embodiment 1:

[0034] The first embodiment of the present application discloses a cold energy air conditioner with global application. It is worth noting that the air conditioners of heavy trucks are currently divided into vehicle air conditioners and parking air conditioners according to their functions, and most of them are split configurations. The reason why this application can be "globally applied" is that the functions of vehicle air conditioners and parking air conditioners are combined into one to meet the application scenarios of all working conditions of heavy trucks.

[0035] Reference Figure 1A cold energy air conditioner for full-area application includes a cold energy recovery mechanism 1, a cold extraction mechanism 2, a cold supplement mechanism 3 and a refrigeration mechanism 4 for cooling a cab, the cold energy recovery mechanism 1 is connected to an LNG gas cylinder 5, the cold extraction mechanism 2 includes a cold extraction device 21 and a cold storage medium 22 arranged in the cold extraction device 21, the cold energy recovery mechanism 1 and the refrigeration mechanism 4 are respectively arranged for heat exchange with the cold storage medium 22, and the cold supplement mechanism 3 is arranged for heat exchange with the refrigeration mechanism 4 through a cold supplement heat exchanger 6; and also includes a measurement and control system 7, the measurement and control system 7 is used to monitor the temperature of the above-mentioned mechanisms and control the operation of the above-mentioned mechanisms.

[0036] After LNG is output from the LNG cylinder 5, it enters the cold energy recovery mechanism 1 and exchanges heat with the cold storage medium 22. The temperature of the cold storage medium 22 decreases, and the LNG cold energy is stored in the cold extractor 21. When the refrigeration mechanism 4 is started, the refrigeration mechanism 4 exchanges heat with the cold storage medium 22 again, thereby providing cold capacity for the refrigeration mechanism 4. The refrigeration mechanism 4 uses the recovered LNG cold energy to cool the cab.

[0037] When in use, the working sequence of the cold energy air conditioner is set through the measurement and control system 7: first, ensure that the refrigeration mechanism 4 utilizes LNG cold energy as much as possible through the cold energy recovery mechanism 1, and achieves rapid cooling in three ways under the maximum cooling state; secondly, turn on the cold extraction mechanism 2 under the maximum cooling and parking state; finally, when the cold energy supply is insufficient in some working conditions, turn on the supplementary cold mechanism 3 to ensure the full application of the cold energy air conditioner. The cold energy recovery mechanism 1, the cold extraction mechanism 2 and the supplementary cold mechanism 3 are controlled in stages through the measurement and control system 7, achieving three goals at one stroke: creating a comfortable and stable working environment for the drivers and passengers and creating conditions for safe driving; reducing energy consumption and creating economic value for end customers; and reducing carbon emissions and contributing to environmental protection.

[0038] Reference Figure 1 The cold energy recovery mechanism 1 includes a cold supply channel 11 and a second heat exchange tube 12 installed on the cold supply channel 11. The cold supply channel 11 passes through the cold taker 21 and the second heat exchange tube 12 is arranged in the cold taker 21. One end of the cold supply channel 11 is connected to the LNG cylinder 5, and the other end is connected to the air intake of the engine 8.

[0039] A gas channel 51 is provided on the outside of the cooler 21, one end of the gas channel 51 and one end of the cooling channel 11 are connected to the output end of the LNG cylinder 5 through a three-way pipe 52, and the other end of the gas channel 51 and the other end of the cooling channel 11 are connected to the air inlet of the engine 8 through a three-way valve 81. A water bath heat exchanger 511 is installed on the gas channel 51, and the water inlet end of the water bath heat exchanger 511 is connected to the cylinder jacket cooling water outlet of the engine 8, and the water outlet end is connected to the cylinder jacket cooling water inlet of the engine 8.

[0040] By controlling the opening and closing of the valve port of the three-way valve 81, the LNG output from the LNG cylinder 5 can be controlled to pass through the cooling channel 11 or the gas channel 51. When it is summer, the LNG output from the LNG cylinder 5 passes through the cooling channel 11, and the LNG exchanges heat with the cold storage medium 22 in the cooler 21 in the cooling channel 11. The cooler 21 stores the cold energy of the LNG to realize the recovery of the cold energy of the LNG. When it is winter and the cold energy air conditioner is not needed for refrigeration, the LNG output from the LNG cylinder 5 passes through the gas channel 51, and the water bath heat exchanger 511 is conducive to the vaporization of LNG, realizing the gas supply to the engine 8 and ensuring the normal operation of the engine 8. In addition, the hot water of the water bath heat exchanger 511 uses the cylinder jacket cooling water of the engine 8, which not only ensures the circulation of the cylinder jacket cooling water of the engine 8 and avoids the damage of the engine 8 due to excessive temperature, but also realizes the recovery of the waste heat of the engine 8 and promotes the vaporization of LNG.

[0041] A second circulation pump 23 is installed in the liquid phase space of the cold extractor 21, and the output end of the second circulation pump 23 is connected to the active cold extracting circuit 24, and the output end of the active cold extracting circuit 24 is connected to the inside of the cold extractor 21. The active cold extracting circuit 24 is provided with an internal heat exchange pipe 53, and the internal heat exchange pipe 53 is arranged in the interlayer of the LNG cylinder 5. When active cold extraction is required in the parking state, the second circulation pump 23 is started to drive the cold storage medium 22 to circulate in the active cold extracting circuit 24. Since the LNG cylinder 5 stores a large amount of cold, the cold storage medium 22 exchanges heat with the LNG in the LNG cylinder 5 through the internal heat exchange pipe 53. Therefore, when the engine 8 stops, that is, there is no LNG input in the cold supply channel 11, the cold extractor 21 can still draw cold from the liquid phase LNG, ensuring that the cold energy air conditioner can perform refrigeration operation and has the function of micro-power cycle refrigeration.

[0042] Reference Figure 1The supplementary cooling mechanism 3 includes a supplementary cooling circuit 31, in which a supplementary cooling medium flows, and the supplementary cooling circuit 31 is connected to one side of the supplementary cooling heat exchanger 6. A gas-liquid separator 32, a compressor 33, a condenser 34 and a throttling element 35 are sequentially arranged on the supplementary cooling circuit 31. In order to ensure a stable supplementary cooling effect, a liquid reservoir 36 is also arranged on the supplementary cooling circuit 31, and the liquid reservoir 36 is arranged between the condenser 34 and the throttling element 35. In the first embodiment, the supplementary cooling medium is R290, and the throttling element 35 is a throttle valve. In this way, the supplementary cooling medium is separated into gas and liquid by the gas-liquid separator 32 to prevent the liquid-phase supplementary cooling medium from entering the compressor 33 and damaging the compressor 33. Under the driving and compression power of the compressor 33, the gas-phase supplementary cooling medium is sucked into the compressor 33 and compressed into a high-temperature and high-pressure gaseous supplementary cooling medium, and then releases heat and condenses into a normal-temperature and high-pressure liquid-phase supplementary cooling medium in the condenser 34. The normal-temperature and high-pressure liquid-phase supplementary cooling medium is converted into a normal-temperature and low-pressure liquid-phase supplementary cooling medium at the throttling element 35. Finally, the liquid-phase supplementary cooling medium passes through the supplementary cooling heat exchanger 6, absorbs heat in the supplementary cooling heat exchanger 6, and becomes a low-temperature and low-pressure gas-phase supplementary cooling medium. In this way, the supplementary cooling medium circulates in the supplementary cooling circuit 31, improving the heat transfer and supplementary cooling effect of the supplementary cooling medium and improving the supplementary cooling efficiency.

[0043] Reference Figure 1 The refrigeration mechanism 4 includes a refrigeration circuit 41 and a first circulation pump 42 and a cold core 43 arranged on the refrigeration circuit 41. A refrigerant flows in the refrigeration circuit 41, and the refrigerant is ethylene glycol. A first heat exchange tube 45 is installed on the refrigeration circuit 41, and the first heat exchange tube 45 is arranged in the liquid phase space of the cold taker 21. The first circulation pump 42 and the cold core 43 are arranged outside the cold taker 21. When the refrigeration mechanism 4 is in working state, the first circulation pump 42 is started, and the refrigerant exchanges heat with the cold storage medium 22 in the first heat exchange tube 45, absorbing the cold energy of the cold storage medium 22. Driven by the first circulation pump 42, the refrigerant circulates in the refrigeration circuit 41, and releases the cold energy into the cab through the cold core 43, realizing air conditioning refrigeration of the cab. An expansion tank 44 is installed on the refrigeration circuit 41. The expansion tank 44 is arranged on the input side of the first circulation pump 42. The fluid pressure in the refrigeration circuit 41 is adjusted by the expansion tank 44 to ensure the pressure stability in the refrigeration circuit 41, thereby ensuring the stability of the refrigeration mechanism 4 in cooling the cab.

[0044] Reference Figure 1 The refrigeration circuit 41 is connected to the side of the supplementary cooling heat exchanger 6 away from the supplementary cooling mechanism 3, and the supplementary cooling heat exchanger 6 is arranged between the first heat exchange pipe 45 and the first circulation pump 42. In this way, the supplementary cooling mechanism 3 is arranged to exchange heat with the refrigeration mechanism 4 through the supplementary cooling heat exchanger 6, and the supplementary cooling mechanism 3 directly exchanges heat with the refrigeration mechanism 4 to supplement the cooling capacity of the refrigeration mechanism 4. The response speed of supplementary cooling is fast, ensuring the timeliness of supplementary cooling.

[0045] An external heat exchanger 9 is provided between the cold supply channel 11 and the refrigeration circuit 41. One side input end of the external heat exchanger is connected to the output end of the cold core 43, and the output end is connected to the input end of the first heat exchange tube 45; the other side input end of the external heat exchanger 9 is connected to the output end of the second heat exchange tube 12, and the output end is connected to the three-way valve 81. After the cold energy of LNG is recovered by the cold extractor 21, the temperature is still below 0°C. The external heat exchanger 9 allows the LNG to exchange heat with the refrigerant in the refrigeration circuit 41. On the one hand, the cold energy loss is further reduced and the refrigerant can be pre-cooled before entering the first heat exchange tube 45, thereby improving the refrigeration efficiency of the refrigeration mechanism 4. On the other hand, the vaporization degree of the LNG passing through the external heat exchanger 9 is further improved, which is conducive to achieving a stable gas supply to the engine 8.

[0046] Reference Figure 1 The supplementary cooling mechanism 3 in the first embodiment adopts the front series mode: the supplementary cooling heat exchanger 6 is arranged in series on the input side of the first circulation pump 42, and the cold core 43 is arranged in series on the output side of the first circulation pump 42. In the refrigeration circuit 41, the supplementary cooling heat exchanger 6 is located at the front end of the cold core 43 and the rear end of the first heat exchange tube 45. Therefore, in the front series mode, the supplementary cooling mechanism 3 is sensitive to the stable changes of the cab and responds quickly, and the supplementary cooling can be started at the first time.

[0047] The implementation principle of the first embodiment of the present application is as follows: In the present application, the cold storage medium 22 in the cold taking mechanism 2 and the refrigerant in the LNG and refrigeration mechanism 4 together form a three-medium heat exchange system, which is interactively connected with the cold energy recovery mechanism 1, the cold taking mechanism 2, the cold supplement mechanism 3 and the refrigeration mechanism 4 respectively. When in use, the working process sequence of the cold energy air conditioner is set by the measurement and control system 7: first, ensure that the refrigeration mechanism 4 utilizes the LNG cold energy through the cold energy recovery mechanism 1 as much as possible, and achieves rapid cooling in a three-pronged approach under the maximum cooling state; secondly, turn on the cold taking mechanism 2 under the maximum cooling and parking state; finally, turn on the cold supplement mechanism 3 under the condition of insufficient cold energy supply in individual working conditions to ensure the full application of the cold energy air conditioner. The cold energy recovery mechanism 1, the cold taking mechanism 2 and the cold supplement mechanism 3 are hierarchically controlled by the measurement and control system 7, achieving three goals at one stroke: creating a comfortable and stable working environment for the driver and passengers, creating conditions for safe driving; reducing energy consumption, creating economic value for end customers; and reducing carbon emissions, contributing to environmental protection.

[0048] Embodiment 2:

[0049] This embodiment 2 discloses a cold energy air conditioner with global application. Figure 2The difference between the second embodiment and the first embodiment is that the supplementary cooling mechanism 3 in the first embodiment adopts a rear series connection mode: the cold core 43 is arranged in series on the input side of the first circulation pump 42, and the supplementary cooling heat exchanger 6 is arranged in series on the output side of the first circulation pump 42. In the refrigeration circuit 41, the supplementary cooling heat exchanger 6 is located at the front end of the first heat exchange tube 45 and the rear end of the cold core 43. Therefore, in the rear series connection mode, the supplementary cooling mechanism 3 can take into account the temperature change of the cold storage medium 22 in the cold extractor 21, so as to facilitate the anchoring of the temperature of the cold storage medium 22.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A global cold energy air conditioner, characterized by: The invention comprises a cold energy recovery mechanism (1), a cold extraction mechanism (2), a cold supplement mechanism (3) and a refrigeration mechanism (4) for cooling a cab, wherein the cold energy recovery mechanism (1) is connected to an LNG gas cylinder (5), the cold extraction mechanism (2) comprises a cold extraction device (21) and a cold storage medium (22) arranged in the cold extraction device (21), the cold energy recovery mechanism (1) and the refrigeration mechanism (4) are respectively arranged to exchange heat with the cold storage medium (22), the cold supplement mechanism (3) is arranged to exchange heat with the refrigeration mechanism (4) via a cold supplement heat exchanger (6), and the invention also comprises a measurement and control system (7), wherein the measurement and control system (7) is used to monitor the temperature of each of the above mechanisms and control the operation of each of the above mechanisms.

2. The global cold energy air conditioner according to claim 1, characterized in that: The cooling device (21) is provided with a second circulation pump (23), and an active cooling circuit (24) is provided at the output end of the second circulation pump (23). The output end of the active cooling circuit (24) is connected to the interior of the cooling device (21). The active cooling circuit (24) is provided with an internal heat exchange pipe (53), and the internal heat exchange pipe (53) is arranged in the interlayer of the LNG gas cylinder (5).

3. The global cold energy air conditioner according to claim 1, characterized in that: The supplementary cooling mechanism (3) comprises a supplementary cooling circuit (31), a supplementary cooling medium flows in the supplementary cooling circuit (31), the supplementary cooling circuit (31) is connected to one side of a supplementary cooling heat exchanger (6), and a gas-liquid separator (32), a compressor (33), a condenser (34) and a throttling element (35) are sequentially arranged on the supplementary cooling circuit (31).

4. The global cold energy air conditioner according to claim 1, characterized in that: The refrigeration mechanism (4) includes a refrigeration circuit (41) and a first circulation pump (42), a cold core (43) and an expansion tank (44) arranged on the refrigeration circuit (41). A refrigerant flows in the refrigeration circuit (41). A first heat exchange tube (45) is provided on the refrigeration circuit (41). The first heat exchange tube (45) is arranged in the liquid phase space of the cold storage device (21). The first circulation pump (42) and the cold core (43) are arranged on the outside of the cold storage device (21).

5. The global cold energy air conditioner according to claim 4, characterized in that: The refrigeration circuit (41) is connected to a side of the supplementary cooling heat exchanger (6) away from the supplementary cooling mechanism (3), and the supplementary cooling heat exchanger (6) is arranged between the first heat exchange pipe (45) and the first circulation pump (42).

6. The global cold energy air conditioner according to claim 2, characterized in that: The cold energy recovery mechanism (1) comprises a cold supply channel (11) and a second heat exchange tube (12) arranged on the cold supply channel (11); the cold supply channel (11) passes through a cold take-off device (21) and the second heat exchange tube (12) is arranged in the cold take-off device (21); one end of the cold supply channel (11) is connected to an LNG gas cylinder (5), and the other end is connected to an air inlet of an engine (8).

7. The global cold energy air conditioner according to claim 6, characterized in that: A gas channel (51) is provided on the outside of the cooler (21), one end of the gas channel (51) and one end of the cooling channel (11) are connected to the output end of the LNG cylinder (5) through a three-way pipe (52), and the other end of the gas channel (51) and the other end of the cooling channel (11) are connected to the air inlet of the engine (8) through a three-way valve (81). A water bath heat exchanger (511) is provided on the gas channel (51), and the water inlet end of the water bath heat exchanger (511) is connected to the cylinder jacket cooling water outlet of the engine (8), and the water outlet end is connected to the cylinder jacket cooling water inlet of the engine (8).

8. The global cold energy air conditioner according to claim 6, characterized in that: An external heat exchanger (9) is provided between the cold supply channel (11) and the refrigeration circuit (41); one side input end of the external heat exchanger (9) is connected to the output end of the cold core (43), and the output end is connected to the input end of the first heat exchange tube (45); the other side input end of the external heat exchanger (9) is connected to the output end of the second heat exchange tube (12), and the output end is connected to the three-way valve (81).

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