Air conditioning system for hydrogen internal combustion engine test room

Abstract

The utility model relates to the technical field of air conditioning systems of hydrogen test rooms, in particular to an air conditioning system for a hydrogen internal combustion engine test room, which comprises an air feeder and further comprises an air inlet pipe, an air supply pipe, a heat exchanger, an air return fan, an air return pipe and an air exhaust pipe. An air inlet of the air feeder is communicated with one end of the air inlet pipe, the other end of the air inlet pipe is communicated with the outside, an air outlet of the air feeder is communicated with one end of the air supply pipe, and the other end of the air supply pipe is communicated with the inside; the heat exchanger is arranged in an air inlet of the air feeder and used for heating or refrigerating air flowing through the air inlet pipe. According to the utility model, one end of the exhaust pipe penetrates through the air inlet pipe and then is communicated with the outside, and the exhaust pipe is used for preheating or precooling air flowing through the air inlet pipe, so that the cold or heat of the air exhausted from the inside is conveniently recovered, and the waste of energy is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning systems for hydrogen-related test laboratories, in particular to an air conditioning system for a hydrogen internal combustion engine test laboratory. Background Art

[0002] The hydrogen internal combustion engine drives the engine by directly burning hydrogen. Compared with traditional fossil fuel engines, it can significantly reduce the emissions of greenhouse gases and other harmful substances, thus becoming one of the key technologies for the automotive industry's transformation to a green and low-carbon one.

[0003] In the air conditioning system of the hydrogen internal combustion engine hydrogen test laboratory, in order to ensure the safe management of hydrogen, a full-year full-air supply and exhaust mode is usually adopted, such as the engine test laboratory comprehensive air supply system disclosed in CN216620100U. The air conditioning system continuously introduces fresh air from the outside and exhausts all the indoor air to dilute the possible hydrogen concentration and avoid the risk of explosion. Although this mode can effectively ensure safety, it also means that the indoor cold or heat is directly discharged to the outside without being recovered, resulting in energy waste. Utility Model Content

[0004] In view of this, the utility model proposes an air conditioning system for a hydrogen internal combustion engine test laboratory, which is connected to the outdoors by arranging one end of an exhaust duct to pass through an air inlet duct, and the exhaust duct is used to preheat or precool the air flowing through the air inlet duct, so as to recover the cold or heat of the indoor exhaust air and reduce energy waste.

[0005] The technical solution of the utility model is achieved in this way:

[0006] The utility model provides an air conditioning system for a hydrogen internal combustion engine test room, comprising a blower, an air inlet pipe, an air supply pipe, a heat exchanger, a return blower, a return air pipe and an exhaust pipe, wherein:

[0007] The blower is arranged on the test room of the hydrogen internal combustion engine, the air inlet of the blower is connected to one end of the air inlet pipe, the other end of the air inlet pipe is connected to the outside, the air outlet of the blower is connected to one end of the air supply pipe, the other end of the air supply pipe is connected to the room;

[0008] The heat exchanger is arranged in the air inlet of the blower and is used to heat or cool the air flowing through the air inlet pipe;

[0009] The return air fan is arranged in a test room of a hydrogen internal combustion engine, an air inlet of the return air fan is connected to one end of the return air duct, and the other end of the return air duct is connected to the room, an air outlet of the return air fan is connected to one end of the exhaust air duct, and the other end of the exhaust air duct is connected to the outside after passing through the air inlet duct, and the exhaust air duct is used to preheat or precool the air flowing through the air inlet duct.

[0010] On the basis of the above technical solution, preferably, the exhaust pipe includes a first pipe body, a second pipe body and a heat exchange pipe body, wherein:

[0011] The heat exchange tube body is fixed between the first tube body and the second tube body through a flange and connected to each other, and the heat exchange tube body passes through the air inlet pipe;

[0012] One end of the first tube body away from the heat exchange tube body is connected to the return air fan outlet;

[0013] One end of the second tube body away from the heat exchange tube body is connected to the outside of the room.

[0014] On the basis of the above technical solution, preferably, the heat exchange tube body comprises a first flange, a second flange and a heat exchange tube, wherein:

[0015] A plurality of heat exchange tubes are arranged side by side between the first flange and the second flange, one end of the heat exchange tube is fixedly connected to the first flange, and the other end is fixedly connected to the second flange;

[0016] The first flange is connected to the first pipe body by bolts, and the second flange is connected to the second flange by bolts;

[0017] A plurality of heat exchange tubes penetrate the air inlet pipe.

[0018] On the basis of the above technical solution, preferably, the heat exchange tube passes through the air inlet pipe along a first preset direction, and the first preset direction is the radial direction of the air inlet pipe.

[0019] On the basis of the above technical solution, preferably, the heat exchanger includes a surface cooling coil, a water inlet pipe and a water return pipe, wherein:

[0020] The surface cooling coil is fixed in the air inlet of the air blower;

[0021] The air in the air inlet pipe passes through the surface cooling coil and then enters the air supply pipe;

[0022] The water inlet end of the surface cooling coil is connected to the water inlet pipe, and the water outlet end is connected to the water return pipe;

[0023] The water inlet pipe and the water return pipe are connected to a cold water source or a hot water source.

[0024] On the basis of the above technical solution, preferably, the heat exchanger further includes a condensate drain pipe, wherein:

[0025] One end of the condensate drainage pipe is connected to the outside of the room;

[0026] The other end of the condensate drain pipe is arranged at the lower end of the surface cooling coil and fixed on the air inlet of the blower, and the condensate drain pipe is connected to the air inlet of the blower.

[0027] On the basis of the above technical solution, preferably, it also includes a filter screen, wherein:

[0028] The filter is fixed in the air inlet of the blower;

[0029] The air in the air inlet pipe passes through the filter screen and then passes through the surface cooling coil.

[0030] On the basis of the above technical solution, preferably, a fresh air electric air valve is provided on one end of the air inlet duct away from the air supply fan, and an exhaust air electric air valve is provided on one end of the second tube body away from the air return fan.

[0031] On the basis of the above technical solution, preferably, a pressure sensor and a temperature and humidity sensor are provided in the supply air fan and the return air fan.

[0032] On the basis of the above technical solution, preferably, it further comprises a connecting pipe, wherein:

[0033] The connecting pipe is arranged between the air inlet pipe and the second pipe body, and the air inlet pipe and the second pipe body are connected through the connecting pipe;

[0034] The connecting pipe is provided with a return air electric air valve.

[0035] The air conditioning system for a hydrogen internal combustion engine test room of the utility model has the following beneficial effects compared with the prior art:

[0036] (1) One end of the exhaust duct is arranged to pass through the air inlet duct and then connect to the outside. The exhaust duct is used to preheat or precool the air flowing through the air inlet duct, so as to recover the cold or heat of the indoor exhaust air and reduce energy waste.

[0037] (2) By arranging a plurality of heat exchange tubes side by side between the first flange and the second flange, the heat exchange effect of the heat exchanger can be improved.

[0038] (3) By arranging a water inlet pipe and a water return pipe to connect a cold water source or a hot water source, it is convenient to heat or cool the air flowing through the air inlet pipe through a heat exchanger, and the switching between hot and cold modes is more convenient.

[0039] (4) By setting up a connecting pipe and a return air electric air valve, it is convenient to simulate the environment during traditional internal combustion engine testing to meet the environmental requirements during traditional internal combustion engine testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 This is a layout diagram of an air conditioning system for a hydrogen internal combustion engine test room of the utility model;

[0042] Figure 2 This is a schematic diagram of an air conditioning system for a hydrogen internal combustion engine test room of the utility model;

[0043] Figure 3 This is a partial structural schematic diagram of an air conditioning system for a hydrogen internal combustion engine test room of the utility model;

[0044] Figure 4 It is a partial cutaway view of an air conditioning system for a hydrogen internal combustion engine test room of the utility model;

[0045] Figure 5 This is a control logic diagram of an air conditioning system for a hydrogen internal combustion engine test room of the utility model;

[0046] In the figure: 1. supply air fan; 2. air inlet duct; 3. supply air duct; 4. heat exchanger; 5. return air fan; 6. return air duct; 7. exhaust duct; 8. filter; 9. connecting pipe; 21. fresh air electric air valve; 41. cooling coil; 42. water inlet pipe; 43. return water pipe; 44. condensate drain pipe; 71. first pipe body; 72. second pipe body; 73. heat exchange pipe body; 74. exhaust air electric air valve; 91. return air electric air valve; 731. first flange; 732. second flange; 733. heat exchange pipe. DETAILED DESCRIPTION

[0047] The following will be combined with the specific implementation of the utility model to clearly and completely describe the technical solution in the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0048] like Figure 1-5 As shown, an air conditioning system for a hydrogen internal combustion engine test room of the utility model includes a blower 1, an air inlet pipe 2, an air supply pipe 3, a heat exchanger 4, a return blower 5, a return air pipe 6 and an exhaust pipe 7, wherein:

[0049] The blower 1 is arranged in a test chamber of a hydrogen internal combustion engine, and the test chamber of a hydrogen internal combustion engine is used for testing the hydrogen internal combustion engine. Figure 1 As shown, the test room is set on the ground, the air supply fan 1 and the return air fan 5 are set on the top of the laboratory and below the roof, the air inlet of the air supply fan 1 is connected to one end of the air inlet pipe 2, and the other end of the air inlet pipe 2 is connected to the outside, the air outlet of the air supply fan 1 is connected to one end of the air supply pipe 3, and the other end of the air supply pipe 3 is connected to the room;

[0050] The heat exchanger 4 is arranged in the air inlet of the blower 1, and is used to heat or cool the air flowing through the air inlet pipe 2; specifically, the heat exchanger 4 includes a surface cooling coil 41, a water inlet pipe 42, a return pipe 43 and a condensate drain pipe 44, wherein the surface cooling coil 41 is fixed in the air inlet of the blower 1, and the air in the air inlet pipe 2 passes through the surface cooling coil 41 and enters the air supply pipe 3; the water inlet end of the surface cooling coil 41 is connected to the water inlet pipe 42, and the water outlet end is connected to the return pipe 43, and the water inlet pipe 42 and the return pipe 43 are connected to a cold water source or a hot water source; one end of the condensate drain pipe 44 is connected to the outdoors, and the other end is arranged at the lower end of the surface cooling coil 41 and fixed on the air inlet of the blower 1, and the condensate drain pipe 44 is connected to the air inlet of the blower 1.

[0051] When cooling is needed, the water inlet pipe 42 is connected to a cold water source, and the cold water enters the surface cooling coil 41 through the water inlet pipe 42 to cool the air flowing through the air inlet pipe 2; when heating is needed, the water inlet pipe 42 is connected to a hot water source, and the hot water enters the surface cooling coil 41 through the water inlet pipe 42 to heat the air flowing through the air inlet pipe 2.

[0052] During actual operation, since the outdoor air contains dust, in order to prevent dust from covering the surface of the surface cooling coil 41 and affecting the heat exchange effect, a filter 8 is fixed in the air inlet of the blower 1, wherein the filter 8 is arranged on the front side of the surface cooling coil 41. When transporting air, the air in the air inlet pipe 2 passes through the filter 8 and then passes through the surface cooling coil 41. During the process, dust is filtered through the filter 8.

[0053] The return air fan 5 is arranged in the test room of the hydrogen internal combustion engine, the air inlet of the return air fan 5 is connected to one end of the return air duct 6, the other end of the return air duct 6 is connected to the room, the air outlet of the return air fan 5 is connected to one end of the exhaust air duct 7, the other end of the exhaust air duct 7 passes through the air inlet duct 2 and is connected to the outside, and the exhaust air duct 7 is used to preheat or precool the air flowing through the air inlet duct 2; specifically, Figure 4 As shown, the exhaust duct 7 includes a first tube body 71, a second tube body 72 and a heat exchange tube body 73, wherein the heat exchange tube body 73 is fixed between the first tube body 71 and the second tube body 72 through a flange and connected, and the heat exchange tube body 73 passes through the air inlet duct 2; one end of the first tube body 71 away from the heat exchange tube body 73 is connected to the air outlet of the return fan 5; and one end of the second tube body 72 away from the heat exchange tube body 73 is connected to the outdoors.

[0054] When the return fan 5 draws indoor air, the indoor air enters the return fan 5 from the return air duct 6 and is then discharged to the outdoors along the exhaust duct 7. During the exhaust process, the air in the exhaust duct 7 exchanges heat with the air in the air inlet duct 2 to achieve preheating or precooling of the air in the air inlet duct 2. When the indoor temperature is high, the air in the exhaust duct 7 preheats the air in the air inlet duct 2. When the indoor temperature is low, the air in the exhaust duct 7 precools the air in the air inlet duct 2. Preheating and precooling can help reduce the working pressure of the subsequent heat exchanger 4, save energy and reduce consumption, and reduce energy waste.

[0055] In the above structure, in order to improve the heat exchange effect of the heat exchanger 4, as Figure 4 As shown, the heat exchange tube body 73 includes a first flange 731, a second flange 732 and a heat exchange tube 733, wherein a plurality of heat exchange tubes 733 are arranged side by side between the first flange 731 and the second flange 732, and the plurality of heat exchange tubes 733 penetrate the air inlet pipe 2 along a first preset direction, and the first preset direction is the radial direction of the air inlet pipe 2; one end of the heat exchange tube 733 is fixedly connected to the first flange 731, and the other end is fixedly connected to the second flange 732; the first flange 731 is connected to the first tube body 71 by bolts, and the second flange 732 is connected to the second flange 732 by bolts; the plurality of heat exchange tubes 733 penetrate the air inlet pipe 2; in this structure, multi-path heat exchange is realized by a plurality of heat exchange tubes 733, thereby effectively improving the heat exchange effect.

[0056] In addition, a fresh air electric air valve 21 is provided on one end of the air inlet pipe 2 away from the air supply fan 1, and an exhaust air electric air valve 74 is provided on one end of the second pipe body 72 away from the air return fan 5; a pressure sensor and a temperature and humidity sensor are provided in the air supply fan 1 and the air return fan 5, wherein Figure 3 and Figure 5 As shown, the fresh air electric air valve 21 and the exhaust air electric air valve 74 are used to control the air volume, and the pressure sensor and the temperature and humidity sensor are used to detect the pressure and temperature and humidity in the air duct to facilitate precise temperature control.

[0057] In addition, in order to enable the above-mentioned air-conditioning system to be used for operating condition testing of traditional internal combustion engines, a connecting pipe 9 is arranged between the air inlet pipe 2 and the second pipe body 72, and the air inlet pipe 2 and the second pipe body 72 are connected through the connecting pipe 9; a return air electric air valve 91 is arranged on the connecting pipe 9; when it is necessary to test the fuel internal combustion engine, partial return air can be carried out through the connecting pipe 9, so that a mode of partial return air + partial fresh air is formed to provide a suitable temperature for the test room, which is conducive to energy saving.

[0058] like Figure 5 As shown, the air conditioning system for a hydrogen internal combustion engine test room of the utility model includes the following three working modes:

[0059] 1. In cooling mode, the return air electric damper 91 is closed, the fresh air electric damper 21 and the exhaust air electric damper 74 are fully opened, full supply and full exhaust, and chilled water is used to provide 18°C ​​cold air to the room;

[0060] 2. Ventilation mode: close the return air electric damper 91, turn off the chilled water, adjust the fan frequency, and use the supply fan 1 to introduce an appropriate amount of fresh air into the room. The return fan 5 ventilates the room and discharges heat. Full supply and full exhaust;

[0061] 3. In heating mode, close the return air electric air valve 91, fully open the fresh air electric air valve 21 and the exhaust air electric air valve 74, use circulating hot water to input 25°C hot air into the room; after the engine is running, gradually reduce the hot water supply, and use the heat generated by the indoor engine to maintain the room temperature at 25°C.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air conditioning system for a hydrogen internal combustion engine test room, comprising a blower (1), characterized in that: It also includes an air inlet pipe (2), an air supply pipe (3), a heat exchanger (4), a return air fan (5), a return air pipe (6) and an exhaust pipe (7), wherein: The blower (1) is arranged in a test room of a hydrogen internal combustion engine, the air inlet of the blower (1) is connected to one end of the air inlet pipe (2), the other end of the air inlet pipe (2) is connected to the outside, the air outlet of the blower (1) is connected to one end of the air supply pipe (3), the other end of the air supply pipe (3) is connected to the inside of the room; The heat exchanger (4) is arranged at the air inlet of the blower (1) and is used to heat or cool the air flowing through the air inlet pipe (2); The return air fan (5) is arranged in a test room of a hydrogen internal combustion engine, an air inlet of the return air fan (5) is connected to one end of the return air duct (6), the other end of the return air duct (6) is connected to the room, an air outlet of the return air fan (5) is connected to one end of the exhaust air duct (7), the other end of the exhaust air duct (7) passes through the air inlet duct (2) and is connected to the outside of the room, and the exhaust air duct (7) is used to preheat or precool the air flowing through the air inlet duct (2).

2. An air conditioning system for a hydrogen internal combustion engine test room as claimed in claim 1, characterized in that: The exhaust pipe (7) comprises a first pipe body (71), a second pipe body (72) and a heat exchange pipe body (73), wherein: The heat exchange tube body (73) is fixed between the first tube body (71) and the second tube body (72) through a flange and is in communication with each other, and the heat exchange tube body (73) passes through the air inlet pipe (2); One end of the first tube body (71) away from the heat exchange tube body (73) is connected to the air outlet of the return air fan (5); One end of the second tube (72) away from the heat exchange tube (73) is connected to the outside of the room.

3. An air conditioning system for a hydrogen internal combustion engine test room as claimed in claim 2, characterized in that: The heat exchange tube body (73) comprises a first flange (731), a second flange (732) and a heat exchange tube (733), wherein: A plurality of heat exchange tubes (733) are arranged side by side between the first flange (731) and the second flange (732); one end of the heat exchange tube (733) is fixedly connected to the first flange (731), and the other end is fixedly connected to the second flange (732); The first flange (731) is connected to the first tube body (71) by bolts, and the second flange (732) is connected to the second flange (732) by bolts; A plurality of the heat exchange tubes (733) penetrate the air inlet pipe (2).

4. An air conditioning system for a hydrogen internal combustion engine test room as claimed in claim 3, characterized in that: The heat exchange tube (733) passes through the air inlet tube (2) along a first preset direction, and the first preset direction is the radial direction of the air inlet tube (2).

5. The air conditioning system for a hydrogen internal combustion engine test room according to claim 1, characterized in that: The heat exchanger (4) comprises a cooling coil (41), a water inlet pipe (42) and a water return pipe (43), wherein: The surface cooling coil (41) is fixed in the air inlet of the air blower (1); The air in the air inlet pipe (2) passes through the surface cooling coil (41) and then enters the air supply pipe (3); The water inlet end of the surface cooling coil (41) is connected to the water inlet pipe (42), and the water outlet end is connected to the water return pipe (43); The water inlet pipe (42) and the water return pipe (43) are connected to a cold water source or a hot water source.

6. An air conditioning system for a hydrogen internal combustion engine test room as claimed in claim 5, characterized in that: The heat exchanger (4) further comprises a condensate drain pipe (44), wherein: One end of the condensate drain pipe (44) is connected to the outside of the room; The other end of the condensate drain pipe (44) is arranged at the lower end of the surface cooling coil (41) and fixed on the air inlet of the blower (1), and the condensate drain pipe (44) is connected to the air inlet of the blower (1).

7. An air conditioning system for a hydrogen internal combustion engine test room as claimed in claim 5, characterized in that: It also includes a filter screen (8), wherein: The filter screen (8) is fixed in the air inlet of the air blower (1); The air in the air inlet pipe (2) passes through the filter screen (8) and then passes through the surface cooling coil (41).

8. An air conditioning system for a hydrogen internal combustion engine test room as claimed in claim 2, characterized in that: A fresh air electric air valve (21) is provided on one end of the air inlet pipe (2) away from the air supply fan (1), and an exhaust air electric air valve (74) is provided on one end of the second pipe body (72) away from the air return fan (5).

9. An air conditioning system for a hydrogen internal combustion engine test room as claimed in claim 7, characterized in that: The air supply fan (1) and the air return fan (5) are provided with a pressure sensor and a temperature and humidity sensor.

10. An air conditioning system for a hydrogen internal combustion engine test room as claimed in claim 2, characterized in that: It also includes a connecting pipe (9), wherein: The connecting pipe (9) is arranged between the air inlet pipe (2) and the second pipe body (72), and the air inlet pipe (2) and the second pipe body (72) are connected via the connecting pipe (9); The connecting pipe (9) is provided with a return air electric air valve (91).

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