Air conditioner, control method thereof and vehicle

Abstract

The present application provides an air conditioner, a control method thereof, and a vehicle. The air conditioner is used to adjust the temperature in the environment where the air conditioner is located; the air conditioner includes a heater, and the heater is used to heat a bed. According to the air conditioner, the control method thereof, and the vehicle of the present application, heating comfort can be improved.

Description

Technical Field

[0001] The present application belongs to the field of vehicle technology, and specifically relates to an air conditioner and a control method thereof and a vehicle. Background Art

[0002] At present, parking air conditioners are widely used by drivers when resting in the truck when the truck is parked for unloading or loading. They use the truck's own or installed batteries to power the air conditioner. Most of the existing parking air conditioners are single cooling machines, which cannot heat the cabin in winter. The few parking air conditioners with heating function all use the form of blowing hot air from the roof. However, the truck cab is usually high, and the air supply distance of the air conditioner is limited. The hot air blown out rises due to its low density, resulting in the cabin being hot on the top and cold on the bottom, and the actual heating comfort is poor; in addition, the hot air heats the entire space of the cab, accelerating the loss of heat from the cab to the outside of the vehicle, wasting battery power but failing to meet the heating demand.

[0003] Therefore, how to provide an air conditioner and a control method thereof and a vehicle that can improve heating comfort has become an urgent problem that technicians in this field need to solve. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present application is to provide an air conditioner and a control method thereof and a vehicle, which can improve heating comfort.

[0005] In order to solve the above problems, the present application provides an air conditioner, which is used to adjust the temperature in the environment where the air conditioner is located; the air conditioner includes a heater, which is used to heat the bed.

[0006] Furthermore, the heater is a first heat exchanger, and the air conditioner includes a second heat exchanger; the first heat exchanger and the second heat exchanger are connected to form a first circulation flow path; the second heat exchanger is used to heat the first heat exchange medium in the first circulation flow path.

[0007] Furthermore, the air conditioner also includes a compressor, a third heat exchanger and a throttling device; the compressor, the second heat exchanger, the throttling device and the third heat exchanger are connected to form a second circulation flow path; the second heat exchange medium compressed by the compressor can exchange heat with the first heat exchange medium in the second heat exchanger to heat the first heat exchange medium after heating the bed.

[0008] Furthermore, the air conditioner also includes a fourth heat exchanger; the compressor, the third heat exchanger, the throttling device and the fourth heat exchanger are connected to form a third circulation flow path, and the third circulation flow path is used to reduce the air temperature in the room where the air conditioner is located or to defrost the third heat exchanger.

[0009] Furthermore, the air conditioner also includes a first switching mechanism; when the third circulation flow path is connected and the second circulation flow path is disconnected, it is a cooling state; when the third circulation flow path is disconnected and the second circulation flow path is connected, it is a heat exchange state. The first switching mechanism is used to switch the air conditioner between the heat exchange state and the cooling state.

[0010] Further, the first switching mechanism includes a first three-way valve, and the first three-way valve includes an A1 port, a B1 port, and a C1 port; the A1 port is connected to the third heat exchanger, the B1 port is connected to the outlet of the compressor; the C1 port is connected to the inlet of the compressor;

[0011] And / or, the first switching mechanism includes a second three-way valve, the second three-way valve includes an A2 port, a B2 port and a C2 port; the A2 port is connected to the throttling device, the B2 port is connected to the fourth heat exchanger; and the C2 port is connected to the second heat exchanger.

[0012] Furthermore, the first heat exchanger is arranged at the bottom of the bed; the first heat exchanger includes a heat exchanger body and a phase change energy storage material, and the phase change energy storage material is arranged outside the heat exchanger body.

[0013] Furthermore, the first heat exchanger is connected to the external engine heat dissipation structure to form a fourth circulation flow path.

[0014] Furthermore, the air conditioner also includes a second switching mechanism; when the first circulation flow path is connected and the fourth circulation flow path is disconnected, it is a heating state; when the first circulation flow path is disconnected and the fourth circulation flow path is connected, it is a preheating state, and the second switching mechanism is used to switch the air conditioner between the heating state and the preheating state.

[0015] Furthermore, the second switching mechanism includes a third three-way valve, which includes an A3 port, a B3 port and a C3 port; the A3 port is connected to the first heat exchanger, the B3 port is connected to the second heat exchanger; and the C3 port is connected to the engine cooling structure.

[0016] According to another aspect of the present application, a vehicle is provided, comprising an air conditioner, which is the above-mentioned air conditioner.

[0017] According to another aspect of the present application, a control method for the air conditioner as described above is provided, comprising the following steps: controlling the air conditioner to enter a heating state; controlling the air conditioner to enter a heating state comprises the following steps: controlling the heater to heat the bed.

[0018] When the air conditioner includes a second heat exchanger; and the first heat exchanger is connected to the second heat exchanger to form a first circulation flow path, controlling the air conditioner to enter a heating state includes the following steps: controlling the first circulation flow path to be connected.

[0019] Furthermore, when the air conditioner further comprises a compressor, a third heat exchanger and a throttling device, and the compressor, the second heat exchanger, the throttling device and the third heat exchanger are connected to form a second circulation flow path, controlling the air conditioner to enter a heating state further comprises the following steps: controlling the second circulation flow path to be connected;

[0020] And / or, when the air conditioner includes a compressor, a third heat exchanger, a throttling device and a fourth heat exchanger, and the compressor, the third heat exchanger, the throttling device and the fourth heat exchanger are connected to form a third circulation flow path, controlling the air conditioner to enter a heating state further includes the following steps: controlling the third circulation flow path to be disconnected;

[0021] And / or, when the first heat exchanger is connected to the external engine heat dissipation structure to form a fourth circulation flow path, controlling the air conditioner to enter a heating state further includes the following step: controlling the fourth circulation flow path to be disconnected.

[0022] Further, when the air conditioner further comprises a first switching mechanism, the first switching mechanism comprises a first three-way valve, and the first three-way valve comprises an A1 port, a B1 port, and a C1 port, controlling the air conditioner to enter a heating state further comprises the following steps: controlling the A1 port and the C1 port to be connected;

[0023] And / or, when the air conditioner further includes a first switching mechanism, the first switching mechanism includes a second three-way valve, and the second three-way valve includes an A2 port, a B2 port, and a C2 port, controlling the air conditioner to enter a heating state further includes the following steps: controlling the A2 port and the C2 port to be connected;

[0024] And / or, when the air conditioner also includes a second switching mechanism, the second switching mechanism includes a third three-way valve, and the third three-way valve includes an A3 port, a B3 port and a C3 port, controlling the air conditioner to enter a heating state also includes the following steps: controlling the A3 port and the B3 port to be connected.

[0025] Further, the method comprises the following steps: controlling the air conditioner to enter a cooling and / or defrosting state;

[0026] When the air conditioner includes a compressor, a third heat exchanger and a throttling device and a fourth heat exchanger, and the compressor, the third heat exchanger, the throttling device and the fourth heat exchanger are connected to form a third circulation flow path, controlling the air conditioner to enter a refrigeration and / or defrosting state also includes the following steps: controlling the third circulation flow path to be connected.

[0027] Furthermore, controlling the air conditioner to enter the cooling and / or defrosting state also includes the following steps:

[0028] When the air conditioner further includes a first switching mechanism, the first switching mechanism includes a first three-way valve, and the first three-way valve includes an A1 port, a B1 port, and a C1 port, controlling the air conditioner to enter a cooling and / or defrosting state further includes the following steps: controlling the A1 port and the B1 port to be connected;

[0029] And / or, when the air conditioner also includes a first switching mechanism, the first switching mechanism includes a second three-way valve, and the second three-way valve includes an A2 port, a B2 port and a C2 port, controlling the air conditioner to enter a cooling and / or defrosting state also includes the following steps: controlling the A2 port and the B2 port to be connected.

[0030] Furthermore, the air conditioner control method further comprises the following steps: controlling the air conditioner to enter a preheating mode;

[0031] When the first heat exchanger is connected to the external engine heat dissipation structure to form a fourth circulation flow path, controlling the air conditioner to enter a preheating state further includes the following steps: controlling the fourth circulation flow path to be connected.

[0032] Further, when the air conditioner also includes a second switching mechanism, the second switching mechanism includes a third three-way valve, and the third three-way valve includes an A3 port, a B3 port and a C3 port, controlling the air conditioner to enter a cooling and / or defrosting state also includes the following steps: controlling the A3 port and the C3 port to be connected.

[0033] The air conditioner and control method thereof and vehicle provided by the present application directly heat the bed, thereby avoiding the upper part being hot and the lower part being cold due to blowing hot air and the accelerated loss of heat to the outside of the vehicle after the entire space of the cab is heated, meeting the driver's need to rest in the car in winter and saving battery power. Directly heating the bed is more comfortable than blowing hot air from top to bottom; local heating is more energy-efficient than heating the entire space; the present application can not only improve heating comfort, but also save battery power. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a structural principle diagram of the air conditioner in the heating state according to an embodiment of the present application;

[0035] Figure 2 This is a structural principle diagram of the air conditioner in the cooling or defrosting state according to the embodiment of the present application;

[0036] Figure 3 This is a structural principle diagram of the air conditioner in the preheating state according to the embodiment of the present application;

[0037] Figure 4 This is a schematic structural diagram of the first heat exchanger of an embodiment of the present application.

[0038] The reference numerals are:

[0039] 11. First heat exchanger; 111. Heat exchanger body; 112. Phase change energy storage material; 113. Heat insulation layer; 114. Heat conduction part; 115. First heat exchange medium inlet; 116. First heat exchange medium outlet; 12. Second heat exchanger; 13. Third heat exchanger; 131. First fan; 14. Fourth heat exchanger; 141. Second fan; 2. Bed; 3. Compressor; 4. Throttling device; 5. Pump body; 6. Engine heat dissipation structure; 71. First three-way valve; 72. Second three-way valve; 73. Third three-way valve. DETAILED DESCRIPTION

[0040] See also Figure 1-4 As shown, an air conditioner is used to adjust the temperature in the environment where the air conditioner is located; the air conditioner includes a heater, and the heater is used to heat the bed 2. By directly heating the bed 2, the upper part is hot and the lower part is cold due to blowing hot air, and the heat loss to the outside of the vehicle is accelerated after the entire space of the cab is heated, which meets the driver's needs for rest in the car in winter and saves battery power. Directly heating the bed 2 is more comfortable than blowing hot air from top to bottom; local heating is more energy-efficient than heating the entire space; the present application can not only improve heating comfort, but also save battery power. The first heat exchange medium can be a coolant, such as water. The heater oil control is electric heating, or it can be various heat exchangers.

[0041] The present application also discloses some embodiments, the heater is a first heat exchanger 11, the air conditioner includes a second heat exchanger 12; the first heat exchanger 11 and the second heat exchanger 12 are connected to form a first circulation flow path; the second heat exchanger 12 is used to heat the first heat exchange medium in the first circulation flow path, that is, to heat the first heat exchange medium after heating the bed 2 in the first heat exchanger 11. The first heat exchange medium can heat the bed 2 through the first heat exchanger 11. When the first heat exchange medium flows into the first heat exchanger 11, it exchanges heat with the bed 2 to heat the bed 2. The heated first heat exchange medium flows into the second heat exchanger 12, the second heat exchanger 12 heats the first heat exchange medium, and the heated first heat exchange medium flows into the first heat exchanger 11 to heat the bed 2, and the circulation flows in sequence. The second heat exchanger 12 can heat the first heat exchange medium in the second heat exchanger 12, or it can be electric heating or other heating methods.

[0042] The present application also discloses some embodiments, in which the air conditioner further includes a compressor 3, a third heat exchanger 13 and a throttling device 4; the compressor 3, the second heat exchanger 12, the throttling device 4 and the third heat exchanger 13 are connected to form a second circulation flow path; the second heat exchange medium compressed by the compressor 3 can exchange heat with the first heat exchange medium in the second heat exchanger 12 to heat the first heat exchange medium after the bed 2 is heated. The high-temperature and high-pressure second heat exchange medium flowing out of the outlet of the compressor 3 enters the second heat exchanger 12 to heat the first heat exchange medium after the bed 2 is heated. After the second heat exchange medium exchanges heat with the first heat exchange medium, it flows into the throttling device 4, the third heat exchanger 13 and the inlet of the compressor 3 in sequence to enter the compressor 3 for re-compression and circulate in sequence. The second heat exchange medium is a refrigerant.

[0043] The present application also discloses some embodiments, in which the air conditioner further includes a fourth heat exchanger 14; the compressor 3, the third heat exchanger 13, the throttling device 4 and the fourth heat exchanger 14 are connected to form a third circulation flow path, and the third circulation flow path is used to reduce the air temperature in the room where the air conditioner is located or to defrost the third heat exchanger 13. When the air conditioner performs cooling in summer or defrosting in winter, the cooling medium compressed by the compressor 3 circulates in the third heat exchanger 13, the throttling device 4 and the fourth heat exchanger 14 in sequence to achieve a cooling effect.

[0044] The third circulation flow path and the second circulation flow path share the compressor 3, the throttling device 4 and the third heat exchanger 13. The difference is that when the compressor 3, the throttling device 4 and the third heat exchanger 13 are in the second circulation flow path, the outlet of the compressor 3 is connected to the second heat exchanger 12 so that the high-temperature and high-pressure second heat exchange medium can heat the first heat exchange medium.

[0045] In the third circulation flow path, the outlet of the compressor 3 is connected to the third heat exchanger 13, and then connected to the throttling device 4 and the fourth heat exchanger 14 in sequence. At this time, the third heat exchanger 13 is an outdoor heat exchanger, and the third heat exchanger 13 is correspondingly provided with a first fan 131. The fourth heat exchanger 14 is an indoor heat exchanger, and a second fan 141 is provided at a corresponding position of the fourth heat exchanger 14. When the air conditioner is cooling in summer, the first fan 131 is turned on so that it can force convection heat release to the outside environment of the vehicle; the second fan 141 is also turned on, which can blow the cold of the fourth heat exchanger 14 into the room to reduce the air temperature in the environment where the air conditioner is located. When defrosting in winter, both the first fan 131 and the second fan 141 are turned off.

[0046] The present application also discloses some embodiments, the air conditioner also includes a first switching mechanism; the third circulation flow path is connected, the second circulation flow path is disconnected for cooling state, the third circulation flow path is disconnected, the second circulation flow path is connected for heat exchange state, and the first switching mechanism is used to switch the air conditioner between heat exchange state and cooling state. In summer, the third circulation flow path is connected to reduce the air temperature in the environment where the air conditioner is located; at this time, the second circulation flow path is disconnected, that is, the second heat exchanger 12 stops heating the first heat exchange medium, then the berth cannot be heated, and the environment remains cool. In winter, the second circulation flow path is connected, and the second heat exchanger 12 circulates and heats the first heat exchange medium, then the first heat exchanger 11 can heat the berth at this time, which can meet the user's heating needs. The heat exchange state in the present application refers to that the second heat exchanger 12 heats the first heat exchange medium by heat exchange, thereby heating the bed 2.

[0047] The present application also discloses some embodiments, in which the first switching mechanism includes a first three-way valve 71, and the first three-way valve 71 includes an A1 port, a B1 port and a C1 port; the A1 port is connected to the third heat exchanger 13, the B1 port is connected to the outlet of the compressor 3; the C1 port is connected to the inlet of the compressor 3; further, the C1 port is connected to the connecting pipeline between the fourth heat exchanger 14 and the inlet of the compressor 3; through the movement of the valve core in the first three-way valve 71, two of the three ports are connected, thereby enabling the air conditioner to switch between the heating state and the cooling state.

[0048] The present application also discloses some embodiments, the first switching mechanism includes a second three-way valve 72, the second three-way valve 72 includes an A2 port, a B2 port and a C2 port; the A2 port is connected to the throttling device 4, the B2 port is connected to the fourth heat exchanger 14; the C2 port is connected to the second heat exchanger 12, and the valve core in the second three-way valve 72 moves, so that two of the three ports are connected, thereby switching the air conditioner between the heating state and the cooling state. The third heat exchanger 13 includes a first interface and a second interface, the first interface of the third heat exchanger 13 is connected to the first end of the throttling device 4, and the second interface of the third heat exchanger 13 is connected to the A1 port; the fourth heat exchanger 14 includes a third interface and a fourth interface, the third interface is connected to the inlet of the compressor 3 through a connecting pipeline, and the C1 port of the first three-way valve 71 is connected to the pipeline; the fourth interface of the fourth heat exchanger 14 is connected to the B2 port of the second three-way valve 72; the A2 port is connected to the second end of the throttling device 4.

[0049] The present application also discloses some embodiments, in which the first heat exchanger 11 is arranged at the bottom of the bed 2; the first heat exchanger 11 includes a heat exchanger body 111 and a phase change energy storage material 112, and the phase change energy storage material 112 is arranged outside the heat exchanger body 111. That is, the first heat exchanger 11 is arranged at the bottom of the bed 2, and the phase change energy storage material 112 is laid between the heat exchanger body 111 and the bed 2. Furthermore, the first heat exchanger 11 also includes a heat insulating layer 113, a heat conducting part 114, a first heat exchange medium inlet 115 and a first heat exchange medium outlet 116; the heat insulating layer 113 is arranged at the bottom and side of the heat exchanger body 111, and the heat conducting part 114 is arranged at the top of the heat exchanger body 111, that is, between the heat exchanger and the bed 2, and the heat conducting part 114 is located at the upper end of the phase change energy storage material 112. When the air conditioner is defrosted in winter, the air conditioner will stop heating the bed 2, and at this time the phase change energy storage material 112 can maintain the temperature of the bed 2 to avoid discomfort caused by the temperature drop caused by the defrosting process.

[0050] The present application also discloses some embodiments, in which the first heat exchanger 11 is connected to the external engine heat dissipation structure 6 to form a fourth circulation flow path. The external engine can be an engine cooling water tank of a vehicle, etc. The waste heat of the engine is used to preheat the bed 2 during driving, which saves battery power and improves the economy of the product. The fourth circulation flow path and the first circulation flow path share a pump body 5, which is connected to the first heat exchanger 11 and is used to drive the first heat exchange medium to flow in the first circulation flow path or circulate. The pump body 5 can be a water pump. At this time, the phase change energy storage material 112 can also store the waste heat of the engine during driving and preheat the bed 2, which saves battery power and improves the economy of the product; in addition, when the outdoor heat exchanger of the air conditioner is defrosted in winter, the phase change energy storage material 112 can maintain the temperature of the bed 2 to avoid discomfort caused by the temperature drop caused by the defrosting process. The present application is more energy-efficient and improves the economy of the product. The first heat exchanger 11 is arranged directly below the berth bed board; the outer layer except the top surface is an insulation layer 113,

[0051] Reduce heat loss in directions other than the top surface; the top surface is a heat-conducting baffle to facilitate heat transfer to the bed 2 above; heat exchange coils are evenly laid in the heater for the circulation of coolant; phase change energy storage material 112 is filled in the space around the heat exchange coils.

[0052] The present application also discloses some embodiments, in which the air conditioner also includes a second switching mechanism; with the first circulation flow path connected and the fourth circulation flow path disconnected for heating state; with the first circulation flow path disconnected and the fourth circulation flow path connected for preheating state, the second switching mechanism is used to switch the air conditioner between the heating state and the preheating state.

[0053] The present application also discloses some embodiments, wherein the second switching mechanism includes a third three-way valve 73, and the third three-way valve 73 includes an A3 port, a B3 port, and a C3 port; the A3 port is connected to the first heat exchanger 11, the B3 port is connected to the second heat exchanger 12; and the C3 port is connected to the engine heat dissipation structure 6. The valve core in the third three-way valve 73 moves, so that two of the three ports are connected, thereby switching the air conditioner between the heating state and the preheating state. The air conditioner is a parking air conditioner. The engine heat dissipation structure 6 is an engine heat dissipation water tank, which is used to dissipate heat from the engine.

[0054] The second circulation flow path and the third circulation flow path are both refrigerant circulation flow paths. The compressor 3 of the present application refers to the electric compressor 3 driven by the vehicle battery. In the third circulation flow path: the third heat exchanger 13 for providing heat exchange between the refrigerant and the vehicle exterior environment is a condenser, and the first fan 131 is a condensing fan; the fourth heat exchanger 14 for providing heat exchange between the refrigerant and the vehicle interior environment is an evaporator, and the second fan 141 is an evaporating fan. The second heat exchanger 12 for providing heat exchange between the refrigerant and the coolant; the throttling device 4 is a throttle valve; these components are all connected through the refrigerant pipeline.

[0055] The first circulation flow path and the fourth circulation flow path are both coolant circulation flow paths. The coolant circulation system consists of a first heat exchanger 11, an engine cooling water tank, a third three-way valve 73, a water pump, and coolant pipes connecting these components; the refrigerant circulation system and the coolant circulation system are connected through two coolant pipes on the coolant side of the second heat exchanger 12.

[0056] According to an embodiment of the present application, a vehicle is provided, including an air conditioner, wherein the air conditioner is the above-mentioned air conditioner. The vehicle is a freight truck, or may be a train or a car with sleeper berths.

[0057] According to an embodiment of the present application, a control method for an air conditioner as described above is provided, comprising the following steps: controlling the air conditioner to enter a heating state; controlling the air conditioner to enter a heating state comprises the following steps: controlling the heater to heat the bed.

[0058] The present application also discloses some embodiments in which when the heater is the first heat exchanger 11 and the air conditioner includes the second heat exchanger 12; when the first heat exchanger 11 and the second heat exchanger 12 are connected to form a first circulation flow path, controlling the air conditioner to enter a heating state includes the following steps: controlling the first circulation flow path to be connected. Then, the second heat exchanger 12 can continuously heat the first heat exchange medium in the first heat exchanger 11 that has heated the bed 2, and the first heat exchange medium in the first heat exchanger 11 can also continuously heat the bed 2, thereby improving the user's comfort.

[0059] The present application also discloses some embodiments. When the air conditioner further includes a compressor 3, a third heat exchanger 13 and a throttling device 4, and the compressor 3, the second heat exchanger 12, the throttling device 4 and the third heat exchanger 13 are connected to form a second circulation flow path, controlling the air conditioner to enter a heating state also includes the following steps: controlling the second circulation flow path to be connected; the second circulation flow path is connected, so that the high-temperature and high-pressure second heat exchange medium compressed by the compressor 3 can heat the first heat exchange medium.

[0060] The present application also discloses some embodiments. When the air conditioner includes a compressor 3, a third heat exchanger 13, a throttling device 4 and a fourth heat exchanger 14, and the compressor 3, the third heat exchanger 13, the throttling device 4 and the fourth heat exchanger 14 are connected to form a third circulation flow path, controlling the air conditioner to enter a heating state also includes the following steps: controlling the third circulation flow path to be disconnected; that is, the air conditioner no longer cools.

[0061] The present application also discloses some embodiments. When the first heat exchanger 11 is connected to the external engine cooling structure 6 to form a fourth circulation flow path, controlling the air conditioner to enter a heating state also includes the following steps: controlling the fourth circulation flow path to be disconnected. At this time, there is no need to preheat the bed 2, and the heating temperature is higher and more comfortable.

[0062] The present application also discloses some embodiments. When the air conditioner further includes a first switching mechanism, the first switching mechanism includes a first three-way valve 71, and the first three-way valve 71 includes an A1 port, a B1 port, and a C1 port, controlling the air conditioner to enter a heating state further includes the following steps: controlling the A1 port and the C1 port to be connected.

[0063] The present application also discloses some embodiments. When the air conditioner also includes a first switching mechanism, the first switching mechanism includes a second three-way valve 72, and the second three-way valve 72 includes an A2 port, a B2 port, and a C2 port, controlling the air conditioner to enter a heating state also includes the following steps: controlling the A2 port and the C2 port to be connected.

[0064] The present application also discloses some embodiments, when the air conditioner further includes a second switching mechanism, the second switching mechanism includes a third three-way valve 73, and the third three-way valve 73 includes an A3 port, a B3 port, and a C3 port, controlling the air conditioner to enter a heating state further includes the following steps: controlling the A3 port and the B3 port to be connected. At this time, the second circulation flow path is connected, and the second heat exchanger 12 can circulate and heat the first heat exchange medium, thereby continuously heating the bed 2.

[0065] The present application also discloses some embodiments, including the following steps: controlling the air conditioner to enter a refrigeration and / or defrosting state;

[0066] When the air conditioner includes a compressor 3, a third heat exchanger 13, a throttling device 4 and a fourth heat exchanger 14, and the compressor 3, the third heat exchanger 13, the throttling device 4 and the fourth heat exchanger 14 are connected to form a third circulation flow path, controlling the air conditioner to enter a cooling and / or defrosting state also includes the following steps: controlling the third circulation flow path to be connected. When the air conditioner is cooling in summer, the first fan 131 is turned on so that it can force convection heat release to the outside environment of the vehicle; the second fan 141 is also turned on, which can blow the cold of the fourth heat exchanger 14 into the room to reduce the air temperature in the environment where the air conditioner is located. When defrosting in winter, both the first fan 131 and the second fan 141 are turned off.

[0067] The present application also discloses some embodiments, wherein controlling the air conditioner to enter a cooling and / or defrosting state further comprises the following steps:

[0068] When the air conditioner further includes a first switching mechanism, the first switching mechanism includes a first three-way valve 71, and the first three-way valve 71 includes an A1 port, a B1 port, and a C1 port, controlling the air conditioner to enter a cooling and / or defrosting state further includes the following steps: controlling the A1 port and the B1 port to be connected;

[0069] The present application also discloses some embodiments. When the air conditioner also includes a first switching mechanism, the first switching mechanism includes a second three-way valve 72, and the second three-way valve 72 includes an A2 port, a B2 port, and a C2 port, controlling the air conditioner to enter a cooling and / or defrosting state also includes the following steps: controlling the A2 port and the B2 port to be connected.

[0070] The present application also discloses some embodiments, wherein the air conditioner control method further comprises the following steps: controlling the air conditioner to enter a preheating mode;

[0071] When the first heat exchanger 11 is connected to the external engine heat dissipation structure 6 to form a fourth circulation flow path, controlling the air conditioner to enter the preheating state also includes the following steps: controlling the fourth circulation flow path to be connected. The heat dissipation of the engine can be used to preheat the bed 2, which can save energy.

[0072] The present application also discloses some embodiments, in which the air conditioner further includes a second switching mechanism, the second switching mechanism includes a third three-way valve 73, and the third three-way valve 73 includes an A3 port, a B3 port and a C3 port. Controlling the air conditioner to enter a cooling and / or defrosting state also includes the following steps: controlling the A3 port and the C3 port to be connected.

[0073] In this application, the specific working process of the air conditioner is as follows:

[0074] 1. Winter sleeper heating cycle

[0075] like Figure 1As shown, A1 of the first three-way valve 71 is connected to C1, A2 of the second three-way valve 72 is connected to C2, and A3 of the third three-way valve 73 is connected to B3;

[0076] The low-temperature and low-pressure gaseous refrigerant enters the compressor 3, is compressed into a high-temperature and high-pressure gaseous refrigerant, and enters the second heat exchanger 12 through the first three-way valve 71; the high-temperature and high-pressure gaseous refrigerant releases heat to the low-temperature coolant through the second heat exchanger 12, and becomes a supercooled liquid refrigerant at normal temperature and high pressure; the supercooled liquid refrigerant at normal temperature and high pressure is throttled by the throttling device 4 and becomes a low-temperature and low-pressure gas-liquid two-phase refrigerant, and enters the third heat exchanger 13 through the second three-way valve 72; the low-temperature and low-pressure gas-liquid two-phase refrigerant absorbs heat from the outside environment through forced convection by the first fan 131, and becomes a low-temperature and low-pressure gaseous refrigerant, and then flows into the compressor 3, thereby completing the refrigerant cycle in the winter berth heating cycle.

[0077] At the same time, the low-temperature coolant is pumped into the second heat exchanger 12 by the water pump, absorbing heat from the high-temperature refrigerant and increasing its temperature; the high-temperature coolant enters the first heat exchanger 11 through the third three-way valve 73, transfers heat to the bed 2, and reduces its temperature; the low-temperature coolant flows back to the pump body 5, thereby completing the coolant circulation in the winter berth heating cycle.

[0078] 2. Summer air conditioning refrigeration method

[0079] like Figure 2 As shown, A1 of the first three-way valve 71 is connected to B1, A2 of the second three-way valve 72 is connected to B2, and A3 of the third three-way valve 73 is connected to B3;

[0080] The low-temperature and low-pressure gaseous refrigerant enters the compressor 3, is compressed into a high-temperature and high-pressure gaseous refrigerant, and enters the third heat exchanger 13 through the first three-way valve 71; the high-temperature and high-pressure gaseous refrigerant releases heat to the outside environment through forced convection by the first fan 131, and becomes a supercooled liquid refrigerant at normal temperature and high pressure; the supercooled liquid refrigerant at normal temperature and high pressure is throttled by the throttling device 4, and becomes a low-temperature and low-pressure gas-liquid two-phase refrigerant, and enters the fourth heat exchanger 14 through the second three-way valve 72; the low-temperature and low-pressure gas-liquid two-phase refrigerant absorbs heat from the inside environment through forced convection by the second fan 141, thereby achieving cooling of the cab space; the low-temperature and low-pressure gaseous refrigerant flowing out of the fourth heat exchanger 14 flows into the compressor 3 again, thereby completing the refrigeration cycle of the air conditioner.

[0081] In summer, bed 2 does not need to be heated, so the coolant circulation system is not involved.

[0082] 3. Winter defrost cycle

[0083] When the winter sleeper heating cycle has been running for a period of time, the condenser, which is the low-pressure side heat exchanger in the refrigerant cycle, will gradually condense frost on its surface, causing its heat exchange effect to decay and affecting the operating efficiency of the air-conditioning system. Therefore, it is necessary to perform defrost cycles regularly to melt the frost on its surface.

[0084] The connection method of the defrost cycle system is the same as the summer air conditioning refrigeration cycle, such as Figure 1 As shown;

[0085] The low-temperature and low-pressure gaseous refrigerant enters the compressor 3, is compressed into a high-temperature and high-pressure gaseous refrigerant, and enters the third heat exchanger 13 through the first three-way valve 71; at this time, the first fan 131 does not work, and the high-temperature and high-pressure gaseous refrigerant transfers heat to the frost on the surface of the third heat exchanger 13 by heat conduction, causing it to melt and flow away, and becomes a supercooled liquid refrigerant at normal temperature and high pressure; the supercooled liquid refrigerant at normal temperature and high pressure is throttled by the throttling device 4 and becomes a low-temperature and low-pressure gas-liquid two-phase refrigerant, and enters the fourth heat exchanger 14 through the second three-way valve 72; in order to prevent cold wind from blowing to the bottom of the cab, the second fan 141 does not work at this time, and the low-temperature and low-pressure gas-liquid two-phase refrigerant only relies on the fourth heat exchanger 14 to naturally exchange heat with the surrounding air, becomes a low-temperature and low-pressure gaseous refrigerant, and then flows into the compressor 3, thereby completing the winter defrosting cycle.

[0086] During the defrost cycle, the water pump does not work, and the temperature of the bed 2 is maintained by relying on the heat stored in the phase change energy storage material 112 in the first heat exchanger 11, so that the temperature of the bed 2 will not drop rapidly due to the defrost cycle of the refrigerant system, causing human discomfort.

[0087] 4. Winter sleeper preheating cycle

[0088] When the vehicle is running in winter, the berth preheating function can be activated to preheat the berth 2 using the waste heat of the engine when the vehicle is running. Figure 3 As shown, A1 of the first three-way valve 71 is connected to C1, A2 of the second three-way valve 72 is connected to C2, and A3 of the third three-way valve 73 is connected to C3;

[0089] The low-temperature coolant is sent into the engine cooling water tank by the heat exchanger body 111, where it absorbs waste heat generated by the engine operation and its temperature rises; the high-temperature coolant enters the first heat exchanger 11 through the third three-way valve 73, where the heat is transferred to the bed 2 and its temperature drops; the low-temperature coolant flows back to the water pump, thereby completing the coolant circulation in the winter berth preheating cycle.

[0090] The refrigerant circulation system does not work when the vehicle is driving in winter.

[0091] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0092] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. An air conditioner, characterized in that: The air conditioner is used to adjust the temperature of the environment in which the air conditioner is located; the air conditioner includes a heater, and the heater is used to heat the bed (2); The heater is a first heat exchanger (11), and the air conditioner comprises a second heat exchanger (12); the first heat exchanger (11) and the second heat exchanger (12) are connected to form a first circulation flow path; the second heat exchanger (12) is used to heat the first heat exchange medium in the first circulation flow path; The first heat exchanger (11) is connected to the external engine heat dissipation structure (6) to form a fourth circulation flow path; The air conditioner also includes a second switching mechanism; when the first circulation flow path is connected and the fourth circulation flow path is disconnected, it is a heating state; when the first circulation flow path is disconnected and the fourth circulation flow path is connected, it is a preheating state, and the second switching mechanism is used to enable the air conditioner to switch between the heating state and the preheating state.

2. The air conditioner according to claim 1, characterized in that: The air conditioner further comprises a compressor (3), a third heat exchanger (13) and a throttling device (4); the compressor (3), the second heat exchanger (12), the throttling device (4) and the third heat exchanger (13) are connected to form a second circulation flow path; the second heat exchange medium compressed by the compressor (3) and the first heat exchange medium can exchange heat in the second heat exchanger (12).

3. The air conditioner according to claim 2, characterized in that: The air conditioner also includes a fourth heat exchanger (14); the compressor (3), the third heat exchanger (13), the throttling device (4) and the fourth heat exchanger (14) are connected to form a third circulation flow path, and the third circulation flow path is used to reduce the air temperature in the room where the air conditioner is located or to defrost the third heat exchanger (13).

4. The air conditioner according to claim 3, characterized in that: The air conditioner also includes a first switching mechanism; when the third circulation flow path is connected and the second circulation flow path is disconnected, it is a cooling state; when the third circulation flow path is disconnected and the second circulation flow path is connected, it is a heat exchange state. The first switching mechanism is used to switch the air conditioner between the heat exchange state and the cooling state.

5. The air conditioner according to claim 4, characterized in that: The first switching mechanism comprises a first three-way valve (71), the first three-way valve (71) comprising an A1 port, a B1 port and a C1 port; the A1 port is connected to the third heat exchanger (13), the B1 port is connected to the outlet of the compressor (3); the C1 port is connected to the inlet of the compressor (3); And / or, the first switching mechanism includes a second three-way valve (72), the second three-way valve (72) includes an A2 port, a B2 port and a C2 port; the A2 port is connected to the throttling device (4), the B2 port is connected to the fourth heat exchanger (14); and the C2 port is connected to the second heat exchanger (12).

6. The air conditioner according to claim 1, characterized in that: The first heat exchanger (11) is arranged at the bottom of the bed (2); the first heat exchanger (11) comprises a heat exchanger body (111) and a phase change energy storage material (112), and the phase change energy storage material (112) is arranged outside the heat exchanger body (111).

7. The air conditioner according to claim 1, characterized in that: The second switching mechanism comprises a third three-way valve (73), the third three-way valve (73) comprising an A3 port, a B3 port and a C3 port; the A3 port is connected to the first heat exchanger (11), the B3 port is connected to the second heat exchanger (12); and the C3 port is connected to the engine cooling structure (6).

8. A vehicle, comprising an air conditioner, characterized in that: The air conditioner is the air conditioner according to any one of claims 1 to 7.

9. A method for controlling an air conditioner according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: controlling the air conditioner to enter a heating state; and controlling the air conditioner to enter a heating state comprises the following steps: controlling the heater to heat the bed.

10. The air conditioner control method according to claim 9, characterized in that: When the heater is a first heat exchanger (11), the air conditioner includes a second heat exchanger (12); when the first heat exchanger (11) and the second heat exchanger (12) are connected to form a first circulation flow path, controlling the air conditioner to enter a heating state includes the following steps: controlling the first circulation flow path to be connected.

11. The air conditioner control method according to claim 10, characterized in that: When the air conditioner further comprises a compressor (3), a third heat exchanger (13) and a throttling device (4), and the compressor (3), the second heat exchanger (12), the throttling device (4) and the third heat exchanger (13) are connected to form a second circulation flow path, the step of controlling the air conditioner to enter a heating state further comprises the following steps: controlling the second circulation flow path to be connected; And / or, when the air conditioner comprises a compressor (3), a third heat exchanger (13), a throttling device (4) and a fourth heat exchanger (14), and the compressor (3), the third heat exchanger (13), the throttling device (4) and the fourth heat exchanger (14) are connected to form a third circulation flow path, the controlling the air conditioner to enter a heating state further comprises the following steps: controlling the third circulation flow path to be disconnected; And / or, when the first heat exchanger (11) is connected to the external engine heat dissipation structure (6) to form a fourth circulation flow path, the control of the air conditioner to enter the heating state also includes the following steps: controlling the fourth circulation flow path to be disconnected.

12. The air conditioner control method according to claim 9, characterized in that: When the air conditioner further comprises a first switching mechanism, the first switching mechanism comprises a first three-way valve (71), and the first three-way valve (71) comprises an A1 port, a B1 port, and a C1 port, the controlling the air conditioner to enter a heating state further comprises the following steps: controlling the A1 port and the C1 port to be connected; And / or, when the air conditioner further comprises a first switching mechanism, the first switching mechanism comprises a second three-way valve (72), and the second three-way valve (72) comprises an A2 port, a B2 port, and a C2 port, the controlling the air conditioner to enter a heating state further comprises the following steps: controlling the A2 port to be connected to the C2 port; And / or, when the air conditioner further includes a second switching mechanism, the second switching mechanism includes a third three-way valve (73), and the third three-way valve (73) includes an A3 port, a B3 port, and a C3 port, the controlling the air conditioner to enter a heating state further includes the following step: controlling the A3 port and the B3 port to be connected.

13. The air conditioner control method according to claim 9, characterized in that: The method comprises the following steps: controlling the air conditioner to enter a refrigeration and / or defrosting state; When the air conditioner comprises a compressor (3), a third heat exchanger (13), a throttling device (4) and a fourth heat exchanger (14), and the compressor (3), the third heat exchanger (13), the throttling device (4) and the fourth heat exchanger (14) are connected to form a third circulation flow path, the control of the air conditioner to enter a cooling and / or defrosting state further comprises the following step: controlling the third circulation flow path to be connected.

14. The air conditioner control method according to claim 13, characterized in that: The controlling the air conditioner to enter a cooling and / or defrosting state further comprises the following steps: When the air conditioner further comprises a first switching mechanism, the first switching mechanism comprises a first three-way valve (71), and the first three-way valve (71) comprises an A1 port, a B1 port, and a C1 port, the controlling the air conditioner to enter a cooling and / or defrosting state further comprises the following steps: controlling the A1 port and the B1 port to be connected; And / or, when the air conditioner further includes a first switching mechanism, the first switching mechanism includes a second three-way valve (72), and the second three-way valve (72) includes an A2 port, a B2 port, and a C2 port, the controlling the air conditioner to enter a cooling and / or defrosting state further includes the following step: controlling the A2 port and the B2 port to be connected.

15. The air conditioner control method according to claim 9, characterized in that: The control method of the air conditioner further comprises the following steps: controlling the air conditioner to enter a preheating mode; When the first heat exchanger (11) is connected to the external engine heat dissipation structure (6) to form a fourth circulation flow path, the control of the air conditioner to enter the preheating state also includes the following steps: controlling the fourth circulation flow path to be connected.

16. The air conditioner control method according to claim 15, characterized in that: When the air conditioner further comprises a second switching mechanism, the second switching mechanism comprises a third three-way valve (73), and the third three-way valve (73) comprises an A3 port, a B3 port, and a C3 port, the control of the air conditioner to enter a cooling and / or defrosting state further comprises the following step: controlling the A3 port and the C3 port to be connected.

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