Air conditioning equipment applied to amphibious vehicle

Abstract

The utility model provides air conditioning equipment applied to an amphibious vehicle, which comprises an outdoor unit, a first heat exchanger and a first fan, a second heat exchanger and a second fan are arranged in the indoor unit; the refrigerant loop is sequentially connected with the compressor, the first heat exchanger, the throttling element and the second heat exchanger so that a refrigerant can circulate. The outdoor unit further comprises a shell, a mounting cavity is formed in the shell, and the compressor, the first heat exchanger and the first fan are arranged in the mounting cavity. The shell can exchange heat with the external environment; the heat dissipation water tank is arranged in the mounting cavity and is adjacent to the first heat exchanger; and the water pump is arranged in the mounting cavity, the water pump is in fluid communication with the external environment and the heat dissipation water tank, and the water pump is used for supplying water from the external environment into the heat dissipation water tank. The air conditioning equipment applied to the amphibious vehicle can normally work in different environments such as land, water and water.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to an air conditioning device applied to amphibious vehicles. Background Art

[0002] Amphibious vehicles are vehicles that can travel on water and land, can float and be propelled in water, and can also travel stably on land. Civilian amphibious vehicles are mainly used in tourism, entertainment and rescue. For example, they can be used as cars and yachts, and can also be used in water swimming, rafting and fishing. In order to provide a more comfortable driving environment, many modern amphibious vehicles are equipped with air conditioning equipment, which can help drivers and passengers stay comfortable in hot or humid environments.

[0003] When cooling, the compressor, condensing fan and evaporating fan of traditional air conditioning equipment all work normally. However, for amphibious vehicles, when the vehicle enters the water, the outdoor unit is installed outside the vehicle wall and is in direct contact with the water, so the condensing fan cannot operate normally, which may cause the air conditioning equipment to fail. Summary of the invention

[0004] In order to solve the problem that after an amphibious vehicle enters water, the condensing fan cannot operate normally because the outdoor unit is installed outside the vehicle wall and is in direct contact with water, resulting in failure of the air-conditioning equipment, an air-conditioning equipment applied to amphibious vehicles is designed and provided.

[0005] An air conditioning device for an amphibious vehicle comprises: an outdoor unit, in which a compressor, a first heat exchanger and a first fan are arranged; an indoor unit, in which a second heat exchanger and a second fan are arranged; a refrigerant circuit sequentially connects the compressor, the first heat exchanger, the throttling element and the second heat exchanger to circulate the refrigerant; the outdoor unit also comprises: a shell, the interior of the shell has an installation cavity, the compressor, the first heat exchanger and the first fan are arranged in the installation cavity; the shell can exchange heat with the external environment; a heat sink, the heat sink is arranged in the installation cavity and is arranged adjacent to the first heat exchanger; and a water pump, the water pump is arranged in the installation cavity, the water pump is connected to the external environment and the heat sink fluid respectively, and the water pump is used to supply water from the external environment to the heat sink.

[0006] Furthermore, the first heat exchanger is vertically arranged close to a side wall of the shell; the heat dissipation water tank is located above the first heat exchanger, and the heat dissipation water tank covers the top surface of the first heat exchanger; the water pump is located on one side of the heat dissipation water tank, and the water pump has: a drain pipe, which is fluidically connected to the heat dissipation water tank; and a water inlet pipe, which extends downward and extends outward from the lower part of the shell to be fluidically connected to the external environment.

[0007] Furthermore, the outdoor unit also includes: a mounting bracket, the mounting bracket includes: a supporting portion, the supporting portion extending from the side wall of the shell to the mounting cavity, the supporting portion being used to support the water pump; and a fixing portion, the fixing portion surrounding the water pump and being detachably fixedly connected to the supporting portion.

[0008] Furthermore, the heat dissipation water tank is in the shape of a tube with a rectangular cross section, and the water inlet pipe is in fluid communication with a through hole opened on a side wall of the heat dissipation water tank.

[0009] Furthermore, the compressor is arranged below the installation cavity and located on one side of the first heat exchanger, and the compressor and the first heat exchanger are spaced apart; the first fan is arranged above the compressor, and the first fan and the compressor are spaced apart.

[0010] Furthermore, it also includes: a liquid level sensor, the liquid level sensor is arranged on the first heat exchanger, the liquid level sensor is used to generate a water level detection signal of the outdoor unit; a drive circuit, which is connected to the liquid level sensor for communication, the drive circuit receives the water level detection signal of the outdoor unit, and drives the water pump to stop running.

[0011] Furthermore, the liquid level sensor is arranged at 1 / 2 height of the first heat exchanger.

[0012] Furthermore, it also includes: a temperature sensor, which is arranged on the first heat exchanger and is used to generate a temperature detection signal of the first heat exchanger.

[0013] Furthermore, the temperature sensor is arranged on the upper part of the first heat exchanger.

[0014] Furthermore, it also includes: a comparison circuit, one input end of the comparison circuit inputs a set temperature signal, another input end of the comparison circuit inputs the first heat exchanger temperature detection signal, and the output end of the comparison circuit outputs a first enable signal to drive the water pump to operate.

[0015] The air-conditioning equipment applied to amphibious vehicles provided by the utility model can work normally in different environments such as on land, on water and underwater. Through the structural design of the outdoor unit, it can adapt to different environmental requirements and improve adaptability and flexibility. The design of the heat dissipation tank and the water pump increases the heat dissipation area and improves the cooling efficiency, so that the air-conditioning equipment can reduce the temperature inside the vehicle more quickly, the cooling efficiency is significantly improved, and the power consumption is significantly reduced, so that energy can be used more effectively.

[0016] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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 some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of a refrigeration cycle structure of an air-conditioning device applied to an amphibious vehicle provided by one or more embodiments of the present application;

[0019] Figure 2 is a schematic structural diagram of an air conditioning device applied to an amphibious vehicle provided by one or more embodiments of the present application;

[0020] Figure 3 is a schematic diagram of the internal structure of an air conditioning device applied to an amphibious vehicle provided by one or more embodiments of the present application;

[0021] Figure 4 is a cross-sectional view of an air conditioning device applied to an amphibious vehicle provided by one or more embodiments of the present application;

[0022] In the figure: 10, outdoor unit; 101, compressor; 102, first heat exchanger; 103, first fan; 104, shell; 105, heat sink; 106, water pump; 107, grille; 108, installation cavity; 109, drain pipe; 110, water inlet pipe; 111, installation bracket; 112, support part; 113, fixing part; 114, heat sink side wall; 115, liquid level sensor; 116, temperature sensor; 20, indoor unit; 201, second heat exchanger; 202, second fan; 203, throttling element; 204, controller. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0026] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and settings discussed in itself. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and the use of other materials.

[0029] The following reference Figures 1 to 4 , the air-conditioning equipment applied to amphibious vehicles provided by the utility model is introduced.

[0030] In principle, the air conditioning device applied to amphibious vehicles is a system that performs a refrigeration cycle through a compressor 101, a condenser, a throttling element 203 and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation to cool the cab or the vehicle compartment.

[0031] From a principle perspective, low-temperature, low-pressure refrigerant enters the compressor 101, which compresses it into high-temperature, high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0032] The throttling element 203 expands the high-temperature and high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant expanded in the throttling device and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor 101. The evaporator can achieve a refrigeration effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. In the entire cycle, the air conditioning device can adjust the temperature in the cab or the compartment.

[0033] The outdoor unit 10 of the air conditioner applied to an amphibious vehicle refers to a part of the refrigeration cycle including the compressor 101 and the first heat exchanger 102. The indoor unit 20 of the air conditioner applied to an amphibious vehicle refers to a part of the refrigeration cycle including the second heat exchanger 201 and the second fan 202, and the throttling element 203 is also provided in the indoor unit 20, and the throttling element 203 is generally selected as an electronic expansion valve. The refrigerant circuit sequentially connects the compressor 101, the first heat exchanger 102, the throttling element 203 and the second heat exchanger 201 to circulate the refrigerant. When the second heat exchanger 201 is used as an evaporator, the air conditioner applied to an amphibious vehicle is used as a coolant in a cooling mode.

[0034] The inverter device supplies AC power to the working compressor 101. When the output frequency of the inverter device changes, the rotation speed of the compressor 101 changes, thereby achieving different air conditioning capabilities.

[0035] The indoor unit 20 is provided with a controller 204, which is arranged in an electrical box with good sealing performance. The controller 204 includes components such as a processor, a storage unit, an input / output interface, and a communication interface.

[0036] In one or more embodiments of the present application, the first fan 103 is an axial flow fan.

[0037] In one or more embodiments of the present application, the second fan 202 is an axial flow fan or a cross flow fan.

[0038] Unlike ordinary split air conditioners, the outdoor unit 10 of the air conditioning equipment used in amphibious vehicles needs to maintain normal operation on land, on water and underwater, and needs to operate normally during normal travel. On land, the split air conditioner can be operated in the same way as ordinary normal air conditioners, that is, according to the temperature difference between the set temperature and the real-time temperature, the controller controls the operation of the first fan, the second fan and the compressor. Controlling the operation of the air conditioner according to the temperature difference between the set temperature and the real-time temperature is a mature technology in the prior art. For example, a PID algorithm or a fuzzy control algorithm can be used. It is not a protection point of the present utility model and will not be repeated here.

[0039] However, when the vehicle is on water (part of the vehicle body is in water) or underwater (stealth), the water level will fluctuate, and the first fan 103 will not have heat dissipation conditions. This is because the first fan 103 is driven to rotate by a motor, and the rotation of the motor causes the fan blades to rotate, thereby generating airflow. If the vehicle is running in water, the rotation of the fan blades will generate greater resistance, and the motor needs more power to maintain rotation, and the operating parameters of the motor cannot match it. In addition, if the motor is not watertight, it will cause a short circuit or other faults.

[0040] To ensure normal operation when operating above and below water, Figures 2 to 4As shown, in one or more embodiments of the present application, the outdoor unit 10 has a housing 104. Preferably, the housing 104 is made of a hard material that has been treated with waterproofing and anti-corrosion, and is designed as a rectangular parallelepiped as a whole, which is easy to install and can ensure that the vehicle body after installation has good integration. The housing 104 has an installation cavity 108 inside, and the compressor 101, the first heat exchanger 102 and the first fan 103 are arranged in the installation cavity 108, and the housing 104 can exchange heat with the external environment. When underwater (most of the vehicle body is underwater and in a stealth state), the outdoor unit 10 as a whole can exchange heat with the external environment (water at this time) by water cooling. Since the efficiency of water cooling heat exchange is much higher than that of air cooling, it can meet the actual use needs at this time. In addition, since the efficiency of water cooling heat exchange is higher than that of air cooling heat exchange, the compressor 101 can achieve an ideal cooling effect by maintaining a lower frequency, which can significantly reduce energy consumption and improve the endurance of the vehicle. At this time, the first fan 103 stops working without affecting the normal use of the air-conditioning equipment.

[0041] To ensure the normal operation of the water mode, the outdoor unit 10 also has a heat sink 105 and a water pump 106. The heat sink 105 is arranged in the installation cavity 108 and is arranged adjacent to the first heat exchanger 102. The water pump 106 is arranged in the installation cavity 108. The water pump 106 is in fluid communication with the external environment and the heat sink 105 respectively. The water pump 106 is used to supply water from the external environment to the heat sink 105. When on water (a small part of the vehicle body is underwater), the heat sink 105 can perform water cooling heat exchange on the first heat exchanger 102 to ensure that the outdoor unit 10 is in normal operation and save energy consumption.

[0042] The air-conditioning equipment applied to amphibious vehicles provided by the utility model can work normally in different environments such as on land, on water and underwater. Through the structural design of the outdoor unit 10, it can adapt to different environmental requirements and improve adaptability and flexibility. The design of the heat dissipation tank 105 and the water pump 106 increases the heat dissipation area and improves the cooling efficiency, so that the air-conditioning equipment can reduce the temperature inside the vehicle more quickly, the cooling efficiency is significantly improved, and the power consumption is significantly reduced, so that energy can be used more effectively.

[0043] From the perspective of structural design, the first heat exchanger 102 is a thin-walled heat exchanger to control the overall size of the outdoor unit 10 as much as possible, so as to facilitate installation in the vehicle. The first heat exchanger 102 is vertically arranged on the side wall close to the shell 104, occupying as little space as possible in the installation cavity 108. The heat dissipation water tank 105 is located above the first heat exchanger 102, and the heat dissipation water tank 105 covers the top surface of the first heat exchanger 102.

[0044] The water pump 106 is located at one side of the heat sink 105 and has a drain pipe 109 and a water inlet pipe 110. The drain pipe 109 is in fluid communication with the heat sink 105, and the water inlet pipe 110 extends downward and extends outward from the lower part of the housing 104 to be in fluid communication with the external environment.

[0045] The design of the first heat exchanger 102 and the heat dissipation water tank 105 maximizes the heat dissipation area and effectively improves the heat dissipation efficiency on the basis of making the internal structure more compact and simple. The distance between the drain pipe 109 and the heat dissipation water tank 105 is closer, which can avoid excessive air and impurities in the pipeline, so that the heat dissipation water tank 105 is filled with cooling water to ensure the heat exchange efficiency.

[0046] In one or more embodiments of the present application, the heat dissipation water tank 105 is a tube with a rectangular cross section. The water inlet pipe 110 is in fluid communication with a through hole opened on a side wall 114 of the heat dissipation water tank 105 .

[0047] The outdoor unit 10 further includes a mounting bracket 111, which is used to mount the water pump 106. The mounting bracket 111 includes a supporting portion 112 and a fixing portion 113, wherein the supporting portion 112 extends from the side wall of the housing 104 toward the mounting cavity 108, and the supporting portion 112 is used to support the water pump 106, and the fixing portion 113 surrounds the water pump 106 and is detachably fixedly connected to the supporting portion 112.

[0048] The mounting bracket 111 composed of the support portion 112 and the fixing portion 113 can make the water pump 106 more stable and reduce vibration during operation. The fixing portion 113 surrounds the water pump 106 and is detachably fixedly connected to the support portion 112, effectively preventing the water pump 106 from moving or falling due to vibration or external force during operation. The design of the mounting bracket 111 makes the installation position of the water pump 106 more flexible and can be adjusted according to actual needs.

[0049] like Figures 2 to 4 As shown, the compressor 101 is arranged below the installation cavity 108 and on one side of the first heat exchanger 102, and the compressor 101 is spaced apart from the first heat exchanger 102. The first fan 103 is arranged above the compressor 101, and the first fan 103 is spaced apart from the compressor 101. Along the height direction of the shell 104, as shown by the arrow H in the figure, a grille 107 is provided on the top wall of the shell 104.

[0050] By spacing the compressor 101 and the first fan 103 apart, the mechanical coupling between the two can be reduced, and the transmission of vibration can be reduced. In addition, by arranging the compressor 101 and the first heat exchanger 102 compactly together and installing the first fan 103 above the compressor 101, the space can be utilized to the greatest extent.

[0051] In one or more embodiments of the present application, the air conditioning device further includes a liquid level sensor 115. The liquid level sensor 115 is disposed on the first heat exchanger 102, and the liquid level sensor 115 is used to generate a water level detection signal of the outdoor unit 10.

[0052] In one or more embodiments of the present application, the air conditioning device further includes a driving circuit (not shown) which is in communication with the liquid level sensor 115 and receives a water level detection signal from the outdoor unit 10 to drive the water pump 106 to stop running.

[0053] Exemplarily, the liquid level sensor 115 is disposed at 1 / 2 of the height of the first heat exchanger 102. When the water level is higher than half of the height of the first heat exchanger 102, it is in the submerged mode, and direct heat exchange between the housing 104 and the external environment is the most efficient heat exchange method, and the water pump 106 is driven to stop running through the driving circuit.

[0054] The driving circuit may be a relay. For example, a group of normally closed contacts of the relay is connected to the water pump 106. When the driving circuit receives the water level detection signal of the outdoor unit 10, the coil of the relay is energized, the normally closed contacts are disconnected, and the water pump 106 is driven to stop running. The driving circuit may also be other similar closed circuits or trigger circuits, that is, when the liquid level sensor 115 detects that the water level is too high, the circuit is disconnected and the water pump 106 is stopped. The relay may be a commercially available relay, and its model and manufacturer are not limited here.

[0055] In one or more embodiments of the present application, a temperature sensor 116 is further included. The temperature sensor 116 is disposed on the first heat exchanger 102 . The temperature sensor 116 is used to generate a temperature detection signal of the first heat exchanger 102 .

[0056] Exemplarily, the temperature sensor 116 is disposed at an upper portion of the first heat exchanger 102 .

[0057] In one or more embodiments of the present application, a comparison circuit is further included, wherein one input end of the comparison circuit inputs a set temperature signal, another input end inputs a temperature detection signal of the first heat exchanger 102, and an output end outputs a first enable signal to drive the water pump 106 to operate.

[0058] In one or more embodiments of the present application, the comparison circuit may be an operational gain amplifier, the temperature detection signal of the first heat exchanger 102 is connected to one input terminal (e.g., non-feedback terminal) of the operational gain amplifier, the set temperature signal is connected to another input terminal (e.g., feedback terminal) of the operational gain amplifier, and the output terminal outputs a first enable signal to drive the water pump 106 to operate. The first enable signal may be a high level signal.

[0059] That is, in the water mode, the comparison circuit is used to compare the actually detected temperature with the preset temperature, and the water pump 106 is coordinated to control the water pump 106 to achieve an ideal heat dissipation effect.

[0060] The comparison circuit can also be a dedicated comparator integrated circuit, such as LM393, LM2903, etc.

[0061] The comparison circuit can also be a microcontroller 204 (MCU), which uses the A / D converter of the comparator to collect the detection value, and then compares the set value and the detection value. When the detection value is higher than the set value, the water pump 106 is driven to run through the output end. Exemplarily, when the temperature of the first heat exchanger 102 is lower than 35°C, the first fan 103 stops, and the water pump 106 works at 40% of the maximum speed; when the temperature of the first heat exchanger 102 is higher than 35°C but lower than 45°C, the water pump 106 works at 60% of the maximum speed; when the temperature of the first heat exchanger 102 is higher than 45°C but lower than 55°C, the water pump 106 works at 80% of the maximum speed; when the temperature of the first heat exchanger 102 is higher than 55°C, the water pump 106 works at the maximum speed. Those skilled in the art can adjust the temperature value corresponding to the set temperature signal according to actual needs.

[0062] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0063] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that can be easily thought of by technicians familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. Air conditioning equipment for amphibious vehicles, including: an outdoor unit, wherein a compressor, a first heat exchanger and a first fan are arranged; an indoor unit, wherein a second heat exchanger and a second fan are disposed; The refrigerant circuit sequentially connects the compressor, the first heat exchanger, the throttling element and the second heat exchanger to circulate the refrigerant; Characterized in that the outdoor unit also includes: A shell, wherein the shell has an installation cavity inside, and the compressor, the first heat exchanger and the first fan are arranged in the installation cavity; the shell can exchange heat with the external environment; a heat dissipation water tank, the heat dissipation water tank being disposed in the installation cavity and adjacent to the first heat exchanger; and A water pump is disposed in the installation cavity, the water pump is in fluid communication with the external environment and the heat dissipation water tank, respectively, and the water pump is used to supply water from the external environment to the heat dissipation water tank.

2. The air conditioning device for amphibious vehicles according to claim 1, characterized in that: The first heat exchanger is vertically arranged close to a side wall of the shell; The heat dissipation water tank is located above the first heat exchanger, and the heat dissipation water tank covers the top surface of the first heat exchanger; The water pump is located at one side of the heat dissipation water tank, and the water pump has: a drain pipe in fluid communication with the heat sink; and The water inlet pipe extends downward and protrudes outward from the lower part of the shell to communicate with the external environment fluid.

3. The air conditioning device for amphibious vehicles according to claim 2, characterized in that: The outdoor unit also includes: A mounting bracket, the mounting bracket comprising: a supporting portion extending from a side wall of the housing toward the mounting cavity, the supporting portion being used to support the water pump; and A fixing portion surrounds the water pump and is detachably fixedly connected to the supporting portion.

4. The air conditioning device for amphibious vehicles according to claim 3, characterized in that: The heat dissipation water tank is in the shape of a tube with a rectangular cross section, and the water inlet pipe is in fluid communication with a through hole opened on the side wall of the heat dissipation water tank.

5. The air conditioning device for amphibious vehicles according to claim 4, characterized in that: The compressor is arranged below the installation cavity and located on one side of the first heat exchanger, and the compressor and the first heat exchanger are arranged at a distance; The first fan is arranged above the compressor, and the first fan is spaced apart from the compressor.

6. The air conditioning device for amphibious vehicles according to any one of claims 1 to 5, characterized in that: Also includes: A liquid level sensor, the liquid level sensor is arranged on the first heat exchanger, and the liquid level sensor is used to generate a water level detection signal for the outdoor unit; The driving circuit is connected to the liquid level sensor for communication. The driving circuit receives the water level detection signal of the outdoor unit and drives the water pump to stop running.

7. The air conditioning device for amphibious vehicles according to claim 6, characterized in that: The liquid level sensor is arranged at 1 / 2 height of the first heat exchanger.

8. The air conditioning device for amphibious vehicles according to claim 6, characterized in that: Also includes: A temperature sensor is disposed on the first heat exchanger and is used to generate a temperature detection signal of the first heat exchanger.

9. The air conditioning device for amphibious vehicles according to claim 8, characterized in that: The temperature sensor is disposed on an upper portion of the first heat exchanger.

10. The air conditioning device for amphibious vehicles according to claim 8, characterized in that: Also includes: A comparison circuit, wherein one input end of the comparison circuit inputs a set temperature signal, another input end of the comparison circuit inputs the first heat exchanger temperature detection signal, and an output end of the comparison circuit outputs a first enable signal to drive the water pump to operate.

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