Vehicle-mounted heat pump device and vehicle

Abstract

The utility model provides a vehicle-mounted heat pump device and a vehicle, and relates to the technical field of automobiles. The vehicle-mounted heat pump device comprises a loading frame and a heat pump assembly, a top isolation plate is arranged at the top of the loading frame, the side wall of the loading frame comprises a plurality of side areas in the circumferential direction of the loading frame, the two side areas are open to form an air inlet and an air outlet respectively, and the air inlet is configured to face a cooling fan of a vehicle; side plates are arranged in other side areas; the heat pump assembly is arranged on a base and a side plate of the loading frame, and a concentration sensor is arranged in the ventilation cavity. The vehicle comprises a vehicle body and the vehicle-mounted heat pump device, the vehicle-mounted heat pump device is arranged in the front end area of a chassis of the vehicle body, and an air inlet of the vehicle-mounted heat pump device faces a cooling fan of the vehicle body forwards; the cooling fan, the heat pump assembly and the concentration sensor are all in communication connection with a controller of the vehicle body. According to the vehicle-mounted heat pump device, combustion explosion accidents caused by refrigerant leakage can be effectively reduced, and the running safety of a vehicle is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive technology, and in particular to an on-board heat pump device and vehicle. Background Technology

[0002] R290 refrigerant, capable of achieving ultra-low temperature heat pumps with expected cooling and heating capabilities and meeting environmental GWP requirements, is currently widely used in vehicle refrigerants. However, R290 refrigerant has a safety rating of A3, which means that refrigerant leaks, especially in the presence of an open flame, could potentially cause a fire or explosion in the vehicle, seriously endangering the safety of drivers and posing a significant safety hazard.

[0003] Therefore, there is an urgent need for an on-board heat pump device that can effectively reduce vehicle combustion and explosion caused by refrigerant leakage and improve vehicle operation safety. Utility Model Content

[0004] The purpose of this utility model is to provide an on-board heat pump device and vehicle to solve the technical problem that refrigerant leakage in existing on-board heat pump devices can easily cause vehicle combustion and explosion, resulting in low vehicle operation safety.

[0005] To solve the above problems, this utility model provides a vehicle-mounted heat pump device, including a loading frame and a heat pump assembly. The top of the loading frame is provided with a top partition plate, and the side of the loading frame includes multiple side areas along its circumference. Two of the side areas are open and respectively form an air inlet and an air outlet, and the air inlet is configured to face the vehicle's cooling fan; the remaining side areas are provided with side plates.

[0006] The heat pump assembly is located on the base and side plate of the loading frame, and at least the compressor, condenser, evaporator and connecting pipes of the heat pump assembly are located in the ventilation cavity enclosed by the loading frame; the ventilation cavity is equipped with a concentration sensor for detecting the refrigerant concentration.

[0007] Optionally, the side panel of the loading rack includes four side zones along its circumference, the four side zones being a first side zone, a second side zone, a third side zone, and a fourth side zone in sequence. The first side zone is open relative to the third side zone to form an air inlet, and the second side zone is open relative to the fourth side zone to form an air outlet. The side plate includes a side partition plate disposed in the third side zone and a side loading plate disposed in the fourth side zone.

[0008] Optionally, the side plate and / or the top partition plate are provided with threading holes, the threading holes are covered with elastic partition sheets, and the elastic partition sheets are provided with threading slots that can deform and allow pipelines to pass through.

[0009] Optionally, the bottom of the top isolation plate is provided with a fire extinguishing component.

[0010] Optionally, the heat pump assembly includes a compressor, a condenser, a heat exchange component, a first electronic expansion valve, and an evaporator. The heat exchange component has a first heat exchange channel and a second heat exchange channel. The compressor, the condenser, the first heat exchange channel, the first electronic expansion valve, and the evaporator are sequentially connected through a main pipeline to form a refrigerant circulation.

[0011] The heat pump assembly further includes a first branch pipe and a second branch pipe. The first end of the first branch pipe is connected to the section of the main pipe located between the condenser and the first heat exchange channel, and the second end is connected to the inlet of the second heat exchange channel. The first end of the second branch pipe is connected to the outlet of the second heat exchange channel, and the second end is connected to the compressor. The first branch pipe is equipped with a second electronic expansion valve, and the second branch pipe is equipped with a first PT sensor.

[0012] Optionally, a second PT sensor is provided in the section of the main pipeline located between the compressor and the evaporator;

[0013] And / or, the main pipeline section located between the compressor and the condenser is equipped with a third PT sensor.

[0014] Optionally, the main pipeline section located between the compressor and the condenser is equipped with a shut-off valve.

[0015] Optionally, the main pipeline section located between the condenser and the first branch pipeline is equipped with a liquid reservoir.

[0016] Optionally, the base is provided with a plurality of dispersed elastic damping members, each elastic damping member including an upper damping part, a lower damping part and a connecting part connecting the two, and the connecting part is recessed relative to the upper damping part and the lower damping part to form an annular groove;

[0017] The compressor has a connecting seat at its bottom, and the connecting seat has multiple connecting holes. The multiple connecting holes are respectively fitted onto the connecting part of one of the elastic damping components and sandwiched between the corresponding upper damping part and the lower damping part.

[0018] This utility model also provides a vehicle, including a vehicle body and the above-mentioned vehicle-mounted heat pump device. The vehicle-mounted heat pump device is located in the front end area of ​​the chassis of the vehicle body, and the air inlet of the vehicle-mounted heat pump device faces forward toward the cooling fan of the vehicle body. The cooling fan, the heat pump component of the vehicle-mounted heat pump device, and the concentration sensor are all communicatively connected to the controller of the vehicle body.

[0019] Optionally, the vehicle body is equipped with a collision sensor, which is communicatively connected to the controller.

[0020] When the vehicle-mounted heat pump device provided by this utility model is applied to a vehicle, the top isolation plate and side plates isolate the ventilation cavity during vehicle operation. On the one hand, this isolates the compressor, condenser, evaporator, and their related connecting pipes, which are prone to refrigerant leakage in the heat pump assembly, from external controllers, power supplies, and other electrical components. This reduces the contact between sparks or even open flames generated during the start-up and operation of electrical components and the leaked refrigerant in the ventilation cavity, thereby preventing the refrigerant from being ignited or even exploding upon contact with an open flame, thus improving the safety of vehicle operation. On the other hand, as the core components of the heat pump assembly, when refrigerant leaks from the compressor, condenser, evaporator, and their connecting pipes, the leaked refrigerant can accumulate in the ventilation cavity, causing the refrigerant concentration in the ventilation cavity to rise rapidly. Correspondingly, the concentration sensor installed in the ventilation cavity can quickly and sensitively monitor the change in refrigerant concentration, thereby achieving sensitive and effective monitoring of refrigerant leakage and further improving the safety of vehicle operation.

[0021] Meanwhile, the concentration sensor can monitor the refrigerant concentration in the ventilation cavity in real time or at regular intervals, and feed the monitored refrigerant concentration signal back to the controller. The controller determines whether there is a refrigerant leak in the heat pump component based on the received refrigerant concentration signal. When the controller determines that there is a refrigerant leak, it controls the heat pump component to shut down to reduce further refrigerant leakage, and controls the cooling fan to start. The cooling fan blows air towards the air inlet to discharge the leaked refrigerant in the ventilation cavity from the air outlet to the outside of the chassis area, avoiding the area of ​​electrical components. This reduces the refrigerant concentration in the ventilation cavity, further reducing the possibility of high refrigerant concentration ignition or even explosion, and correspondingly reducing the risk of refrigerant leakage to the vehicle, thus improving the safety of vehicle operation. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 A first-view schematic diagram of the vehicle-mounted heat pump device provided in an embodiment of this utility model;

[0024] Figure 2 A second-view schematic diagram of the vehicle-mounted heat pump device provided in an embodiment of this utility model;

[0025] Figure 3 for Figure 2 A magnified view of part A in the image;

[0026] Figure 4 A first-view schematic diagram of the heat pump components arranged on the base in the vehicle-mounted heat pump device provided in this embodiment of the utility model.

[0027] Figure 5 A second-view schematic diagram of the heat pump assembly arranged on the base in the vehicle-mounted heat pump device provided in this embodiment of the utility model;

[0028] Figure 6 A third-view schematic diagram of the heat pump assembly arranged on the base in the vehicle-mounted heat pump device provided in this embodiment of the utility model.

[0029] Figure 7 A schematic diagram of the heat pump component in the vehicle-mounted heat pump device provided in this embodiment of the utility model.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100-Loading rack; 110-Air inlet; 120-Air outlet; 130-Base; 140-Ventilation chamber; 200-Heat pump assembly; 210-Compressor; 211-Connecting seat; 220-Condenser; 230-Heat exchange component; 231-First heat exchange channel; 232-Second heat exchange channel; 240-Evaporator; 250-Liquid receiver; 261-First electronic expansion valve; 262-Second electronic expansion valve; 263-Stop valve; 271-First P T-sensor; 272-Second PT sensor; 273-Third PT sensor; 281-Main pipeline; 282-First branch pipeline; 283-Second branch pipeline; 300-Top isolation plate; 40-Side plate; 400-Side isolation plate; 410-Wire hole; 420-Elastic isolation sheet; 421-Wire seam; 500-Side loading plate; 600-Elastic damping component; 610-Upper damping part; 620-Lower damping part; 710-Bolt; 720-Nut. Detailed Implementation

[0032] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] This embodiment provides a vehicle-mounted heat pump device, such as... Figure 1 and Figure 2 As shown, the device includes a loading rack 100 and a heat pump assembly 200. The top of the loading rack 100 is provided with a top partition plate 300. The side walls of the loading rack 100 include multiple side zones along its circumference. Two of the side zones are open and respectively form an air inlet 110 and an air outlet 120, and the air inlet 110 is configured to face the vehicle's cooling fan. The remaining side zones are provided with side plates 40. The heat pump assembly 200 is mounted on the base 130 and side plates 40 of the loading rack 100. At least the compressor 210, condenser 220, evaporator 240 of the heat pump assembly 200 and the connecting pipes between them are located in the ventilation cavity 140 enclosed by the loading rack 100. A concentration sensor for detecting the refrigerant concentration is provided in the ventilation cavity 140.

[0036] This embodiment also provides a vehicle, including a vehicle body and the above-mentioned vehicle-mounted heat pump device. The vehicle-mounted heat pump device is located in the front end area of ​​the chassis of the vehicle body, and the air inlet 110 of the vehicle-mounted heat pump device faces forward toward the cooling fan of the vehicle body. The cooling fan, the heat pump component 200 of the vehicle-mounted heat pump device, and the concentration sensor are all communicatively connected to the controller of the vehicle body.

[0037] In the vehicle-mounted heat pump device and vehicle provided in this embodiment, the vehicle-mounted heat pump device includes a heat pump assembly 200 for temperature regulation and a mounting frame 100 serving as the mounting base for the heat pump assembly 200. The side of the mounting frame 100 is divided into at least three side zones, one of which is open and serves as an air inlet 110, another side zone is open and serves as an air outlet 120, and the remaining side zones are covered with side plates 40 that simultaneously isolate open flames and are used to install components such as water pumps in the vehicle and some components of the heat pump assembly 200. The top of the mounting frame 100 is covered with a top isolation plate 300 for isolating open flames. The space enclosed by the top isolation plate 300, side plates 40, and base 130 serves as both a housing cavity for the heat pump assembly 200 and a ventilation cavity 140 for airflow to discharge leaked refrigerant. A concentration sensor is provided in the ventilation cavity 140 to detect the refrigerant concentration inside in order to determine whether the heat pump assembly 200 has leaked refrigerant.

[0038] The vehicle includes a vehicle body and the aforementioned on-board heat pump device. A cooling fan for heat dissipation is arranged in the front area of ​​the engine compartment of the vehicle body, and the vehicle body has a controller. The on-board heat pump device is installed in the front area of ​​the chassis of the vehicle body, with its air inlet 110 facing forward toward the cooling fan and its air outlet 120 facing toward the side with fewer electrical components in the engine compartment. The water pump and other components of the vehicle are arranged on the outer side of a partial area of ​​the side panel 40. The controller and other electrical components of the vehicle are arranged on the top of the top partition 300 and on the outer side of a partial area of ​​the side panel 40. The heat pump assembly 200, the concentration sensor, and the cooling fan are all communicatively connected to the controller, and the controller can control the start and stop of the cooling fan according to the concentration signal fed back by the concentration sensor.

[0039] During vehicle operation, the top partition 300 and side panels 40 isolate the ventilation cavity 140. On one hand, this isolates the compressor 210, condenser 220, evaporator 240, and their related connecting pipes in the heat pump assembly 200, which are prone to refrigerant leakage, from external controllers, power supplies, and other electrical components. This reduces the risk of sparks or even open flames generated during the start-up and operation of these components coming into contact with the leaked refrigerant in the ventilation cavity 140, thus preventing the refrigerant from igniting or even exploding upon contact with an open flame, thereby improving vehicle safety. On the other hand, as the core components of the heat pump assembly 200, the compressor 210, condenser 220, and evaporator 240, along with their connecting pipes, experience refrigerant leakage. The leaked refrigerant accumulates in the ventilation cavity 140, causing a rapid increase in refrigerant concentration. Consequently, the concentration sensor installed in the ventilation cavity 140 can quickly and sensitively detect changes in refrigerant concentration, achieving sensitive and effective monitoring of refrigerant leakage and further improving vehicle safety.

[0040] Specifically, the concentration sensor can monitor the refrigerant concentration in the ventilation cavity 140 in real time or at regular intervals, and feed the monitored refrigerant concentration signal back to the controller. The controller determines whether there is a refrigerant leak in the heat pump assembly 200 based on the received refrigerant concentration signal. When the refrigerant concentration signal is less than the preset concentration threshold in the controller, the controller determines that there is no refrigerant leak, and the heat pump assembly 200 remains in its current state. When the refrigerant concentration signal is greater than or equal to the preset concentration threshold in the controller, the controller determines that there is a refrigerant leak, controls the heat pump assembly 200 to shut down to reduce further refrigerant leakage, and controls the cooling fan to start. The cooling fan blows air towards the air inlet 110 to discharge the leaked refrigerant in the ventilation cavity 140 from the air outlet 120 to the outside of the chassis area, away from electrical components, thereby reducing the refrigerant concentration in the ventilation cavity 140. This further reduces the possibility of high refrigerant concentration causing ignition or even explosion, and correspondingly reduces the risk of refrigerant leakage to the vehicle, improving the safety of vehicle operation.

[0041] In this embodiment, the vehicle's display screen, display instruments, etc. are all communicatively connected to the controller. When the concentration sensor detects that the refrigerant concentration reaches 25% LFL, the controller determines that there is a refrigerant leak. In addition to controlling the shutdown of the heat pump component 200 and starting the cooling fan, it can also simultaneously display a first-level alarm signal through the display screen or display instruments or sound and light alarm to quickly alert the user to the refrigerant leak, prompting them to pull over and stay away from the vehicle.

[0042] Specifically, the refrigerant for the heat pump assembly 200 can be R290 refrigerant; the top isolation plate 300 and the side isolation plate 400 can be made of Q235 material.

[0043] In this embodiment, the side wall of the loading rack 100 includes four side areas along its circumference. The four side areas are, in order, a first side area, a second side area, a third side area, and a fourth side area. The first side area is open relative to the third side area to form an air inlet 110, and the second side area is open relative to the fourth side area to form an air outlet 120. The side plate 40 includes a side partition plate 400 disposed in the third side area and a side loading plate 500 disposed in the fourth side area.

[0044] Specifically, the loading rack 100 can be a regular rectangular body. The third side area is covered with a side isolation plate 400 for isolating open flames. The fourth side area is provided with a side loading plate 500 that simultaneously isolates open flames and is used to install components such as water pumps and some components of the heat pump assembly 200 in the vehicle. When the vehicle-mounted heat pump device is installed in the vehicle, the vehicle's water pump and other components are arranged on the outside of the side loading plate 500, and the vehicle's controller and other electrical components are arranged on the top of the top isolation plate 300 and the outside of the side isolation plate 400.

[0045] In this embodiment, as Figure 1As shown, at least one of the side panel 40 and the top partition 300 is provided with a wire hole 410. An elastic partition 420 is sealed at the wire hole 410, and the elastic partition 420 is provided with a wire slot 421 that can deform and allow pipelines to pass through. When the elastic partition 420 is not subjected to external force, it is in a state of opening and closing the wire hole 410. When the heat pump assembly 200 is assembled on the loading frame 100, the wires connected to the compressor 210, electronic expansion valve, concentration sensor, etc., as well as the refrigerant pipeline, can pass through the wire slot 421 to connect to the power supply, etc. The elastic partition 420 deforms under the pressure of the pipeline to allow the pipeline to pass through, and elastically compresses the outer wall of the pipeline to ensure the closed state at the wire hole 410. Thus, while allowing the pipeline to extend out of the loading frame 100, it ensures the isolation effect of the side panel 40 and the top partition 300 on the refrigerant leaking into the ventilation cavity 140 and external electrical components, thereby ensuring the operational safety of the vehicle.

[0046] Specifically, such as Figure 1 As shown, the threading hole 410 is located in the side partition plate 400 of the side plate 40, and the center of the elastic partition plate 420 can be divided into a cross threading seam 421 to divide the elastic partition plate 420 into four pieces.

[0047] Specifically, in this embodiment, as Figures 4-7 As shown, the heat pump assembly 200 includes a compressor 210, a condenser 220 (WCC), a heat exchange component 230, a first electronic expansion valve 261 (EXV1), and an evaporator 240 (Chiller). The heat exchange component 230 has a first heat exchange channel 231 and a second heat exchange channel 232. The compressor 210, condenser 220, first heat exchange channel 231, first electronic expansion valve 261, and evaporator 240 are sequentially connected through a main pipeline 281 to form a refrigerant circulation. The heat pump assembly also includes a first Branch pipe 282 and second branch pipe 283, the first end of the first branch pipe 282 is connected to the pipe section of the main pipe 281 located between the condenser 220 and the first heat exchange channel 231, and the second end is connected to the inlet of the second heat exchange channel 232. The first end of the second branch pipe 283 is connected to the outlet of the second heat exchange channel 232, and the second end is connected to the compressor 210. The first branch pipe 282 is provided with a second electronic expansion valve 262 (EXV2), and the second branch pipe 283 is provided with a first PT sensor 271.

[0048] In addition to core components such as compressor 210, condenser 220, first electronic expansion valve 261, and evaporator 240, the heat pump assembly 200 also includes a heat exchange component 230 between the condenser 220 and the first electronic expansion valve 261. Specifically, the heat exchange component 230 can be a plate heat exchanger. During operation, the refrigerant, after passing through the condenser 220, becomes a medium-high temperature and high-pressure liquid. At the connection between the first branch pipe 282 and the main pipe 281, it splits into a larger flow of mainstream refrigerant and a smaller flow of refrigerant tributary. The mainstream refrigerant flows through the main pipe 281 into the first heat exchange channel 231 of the heat exchange component 230. The tributary flows through the first branch pipe 282, expands after passing through the second electronic expansion valve 262, and becomes a medium-high temperature and medium-pressure vapor, continuing to flow into the second heat exchange channel 232 of the heat exchange component 230. Heat exchange occurs between the mainstream refrigerant in the first heat exchange channel 231 and the tributary refrigerant in the second heat exchange channel 232. In this process, the mainstream refrigerant releases heat for further subcooling, increasing the subcooling degree when the refrigerant flows into the first electronic expansion valve 261, thereby improving the heat absorption efficiency of the evaporator 240. Simultaneously, the refrigerant branch absorbs heat, its temperature rises, and it changes from wet steam to dry steam before entering the middle chamber of the compressor 210 via the second branch pipe 283. This increases the mass flow rate of the refrigerant, improves the total refrigerant circulation volume of the system, enhances the heating capacity, and reduces the occurrence of liquid slugging caused by liquid refrigerant entering the compressor 210, which could damage the compressor 210 valve plates or bearings. Furthermore, the compression process of dry steam is closer to isentropic, reducing energy loss. The enthalpy carried by the make-up steam can directly participate in the compression, reducing the discharge temperature of the compressor 210. Correspondingly, this reduces the compression ratio of the compressor 210, reduces the power consumption during the compression process (reducing mechanical load and temperature fluctuations, reducing wear and failure risk of the compressor 210), and improves system energy efficiency.

[0049] The second electronic expansion valve 262 and the first PT sensor 271 are both communicatively connected to the controller. The first PT sensor 271 can detect the temperature and pressure of the refrigerant in the second branch pipe 283 and feed back the detected temperature and pressure signals to the controller. The controller adjusts the opening of the second electronic expansion valve 262 according to the temperature and pressure signals to regulate the flow rate and expansion degree of the refrigerant branch flowing through the second electronic expansion valve 262, thereby rationally distributing the main refrigerant flow and the refrigerant branch flow to ensure system energy efficiency.

[0050] In this embodiment, as Figures 4-7As shown, a second PT sensor 272 is installed in the section of main pipeline 281 between compressor 210 and evaporator 240; a third PT sensor 273 is installed in the section of main pipeline 281 between compressor 210 and condenser 220. The second PT sensor 272 can detect the refrigerant temperature and pressure on the intake side of compressor 210 and feed back the detected temperature and pressure signals to the controller; the third PT sensor 273 can detect the refrigerant temperature and pressure on the exhaust side of compressor 210 and feed back the detected temperature and pressure signals to the controller.

[0051] When the heat pump assembly 200 is in a stopped or standby state, the pressure and temperature of the refrigerant in the refrigerant circulation are approximately equal. At least one of the three PT sensors 271, 272, and 273 will feed back the detected temperature and pressure signals to the controller. The controller will find the corresponding normal refrigerant pressure in its storage tank based on the received temperature signal and compare the actual refrigerant pressure represented by the received pressure signal with the normal refrigerant pressure. When the actual refrigerant pressure is lower than the normal refrigerant pressure, it is determined that the heat pump assembly 200 has a refrigerant leak, and the controller will control the cooling fan to run at a preset speed for a preset time. Specifically, the preset speed can be the minimum speed of the cooling fan, and the preset time can be 5 minutes, in order to quickly discharge the leaked refrigerant in the ventilation cavity 140. When the actual refrigerant pressure is approximately equal to the normal refrigerant pressure, it is determined that the heat pump assembly 200 has not a refrigerant leak, and the controller will control the heat pump assembly 200 and the cooling fan to remain in a closed state. Specifically, when the temperature is at room temperature, the corresponding normal refrigerant pressure range is 6 bar to 8 bar; when the temperature range is -40℃ to 43℃, the corresponding normal refrigerant pressure range is 1 bar to 15 bar.

[0052] When the heat pump assembly 200 is in operation, the second PT sensor 272 detects the low-pressure and temperature on the intake side of the compressor 210, and the third PT sensor 273 detects the high-pressure and temperature on the exhaust side of the compressor 210. Both sensors feed back the detected pressure and temperature signals to the controller. The controller compares the actual refrigerant pressure represented by the received pressure signal with the normal refrigerant pressure, and compares the actual refrigerant temperature represented by the temperature signal with the normal refrigerant temperature. Taking the cooling state as an example, when the actual refrigerant pressure is lower than the normal refrigerant pressure and the actual refrigerant temperature is higher than the normal refrigerant temperature, it is determined that the heat pump assembly 200 has a refrigerant leak, and the cooling fan is turned on to run at a preset speed for a preset time. When the actual refrigerant pressure is approximately equal to the normal refrigerant pressure and the actual refrigerant temperature is approximately equal to the normal refrigerant temperature, it is determined that the heat pump assembly 200 has not a refrigerant leak, and the heat pump assembly 200 is controlled to maintain its current operating state, while the cooling fan is controlled to remain in its current off state. Specifically, during refrigeration operation, the normal low pressure range on the intake side of compressor 210 is 3–6 bar, and the normal high pressure range on the exhaust side is 19–23 bar; the suction temperature range on the intake side of compressor 210 is -9℃–10℃, and the exhaust temperature range on the exhaust side is 95℃–115℃.

[0053] In this embodiment, as Figures 4-7 As shown, the main pipeline 281, located between the compressor 210 and the condenser 220, is equipped with a shut-off valve 263 (ERV). The shut-off valve 263 is located on the discharge side of the compressor 210. When the heat pump assembly 200 is in a stopped or standby state, there is a large amount of refrigerant on the discharge side of the compressor 210. Controlling the shut-off valve 263 to close it cuts off refrigerant circulation, thereby reducing the risk of leakage caused by refrigerant accumulation and further mitigating the risk of leakage accidents, thus ensuring the operational safety of the vehicle. Specifically, when the heat pump assembly 200 is in a stopped or standby state, in addition to controlling the shut-off valve 263 to be closed, the first electronic expansion valve 261 and the second electronic expansion valve 262 can also be controlled to be closed to further enhance the degree of cutoff of refrigerant circulation.

[0054] During the operation of the heat pump assembly 200, when the second PT sensor 272 and the third PT sensor 273 detect abnormal refrigerant pressure, if the second PT sensor 272 and the third PT sensor 273 detect that the refrigerant pressure continues to drop, or if the concentration sensor detects that the refrigerant concentration reaches 25% LFL, the controller controls the compressor 210, the shut-off valve 263, the first electronic expansion valve 261 and the second electronic expansion valve 262 to shut down, and controls the cooling fan to start running at a preset speed for a preset time. At the same time, the controller will also notify the user of a first-level alarm signal through the display screen, display instruments, etc., to stay away from the vehicle due to refrigerant leakage.

[0055] In this embodiment, a fire extinguishing component is provided at the bottom of the top isolation plate 300. When the second PT sensor 272, the third PT sensor 273, and the concentration sensor detect significant abnormalities in refrigerant pressure, temperature, and concentration, a secondary alarm signal can be sent to the user via a display screen or instrument panel to notify them to move away from the vehicle where the refrigerant is leaking. The fire extinguishing component can then be activated to spray extinguishing agent toward the heat pump assembly 200 to prevent or extinguish a fire, thereby further reducing the risk of fires and explosions caused by refrigerant leaks and improving vehicle safety.

[0056] In this embodiment, the vehicle body is equipped with a collision sensor, which is communicatively connected to the controller. During vehicle operation, the collision sensor detects collisions in real time. When the collision sensor detects a collision, and the second PT sensor 272, the third PT sensor 273, and the concentration sensor detect refrigerant pressure and concentration, and the temperature is abnormal, the controller shuts down the compressor 210, the shut-off valve 263, the first electronic expansion valve 261, the second electronic expansion valve 262, and the main power supply. It also activates the fire extinguishing components to spray extinguishing agent towards the heat pump assembly 200 for fire prevention or suppression. Simultaneously, a secondary alarm signal is sent to the user via a display screen and other instruments to notify them of a refrigerant leak and to evacuate the vehicle.

[0057] In this embodiment, as Figures 4-7 As shown, the section of main pipe 281 located between condenser 220 and first branch pipe 282 is equipped with a liquid receiver 250. When the load of the refrigerant circulation changes, the liquid receiver 250 can replenish or store refrigerant liquid according to the load change, so as to effectively buffer and compensate for the change, thereby ensuring the stability of the liquid level in condenser 220 and the sufficient liquid supply of the first electronic expansion valve 261 and the second electronic expansion valve 262, and improving the load change adaptability of heat pump assembly 200.

[0058] In this embodiment, as Figure 2 and Figure 3As shown, the base 130 is provided with a plurality of dispersed elastic damping members 600. Each elastic damping member 600 includes an upper damping part 610, a lower damping part 620, and a connecting part connecting the two. The connecting part is recessed relative to the upper damping part 610 and the lower damping part 620 to form an annular groove. The bottom of the compressor 210 is provided with a connecting seat 211. The connecting seat 211 is provided with a plurality of connecting holes. The plurality of connecting holes are respectively fitted into the connecting part of one of the elastic damping members 600 and sandwiched between the corresponding upper damping part 610 and lower damping part 620. The connecting parts are coaxial and their outer diameter is smaller than that of the upper damping part 610 and the lower damping part 620. The connecting parts radially restrict the position of the connecting hole and the connecting seat 211, while the upper damping part 610 and the lower damping part 620 axially restrict the position of the connecting hole and the connecting seat 211. This connects the connecting seat 211 and the compressor 210 to the base 130. There is no direct rigid connection between the connecting seat 211 and the base 130. When the compressor 210 vibrates during operation, the elastic connecting parts can dampen the radial vibration of the connecting seat 211, and the elastic upper damping part 610 and the lower damping part 620 can dampen the axial vibration of the connecting seat 211. This provides comprehensive vibration damping for the operation of the compressor 210, reducing the vibration and noise generated by the operation of the compressor 210. Consequently, it improves the operational stability and quietness of the vehicle heat pump device, and enhances the stability and comfort of the vehicle.

[0059] Specifically, the base 130 may be provided with a fixing hole, and the elastic damper 600 has a through hole at its axis that runs through its circumference; after the connecting hole is fitted onto the elastic damper 600, a bolt 710 is passed through the fixing hole and the through hole in sequence and then screwed on with a nut 720, thereby fixing the elastic damper 600, the connecting seat 211 and the compressor 210 to the base 130.

[0060] In this embodiment, the base 130 and the chassis can also be elastically connected by an elastic damping component 600 to further reduce the vibration noise transmitted to the cab from the operation of the vehicle heat pump device.

[0061] Specifically, the evaporator 240, condenser 220, and heat exchanger are all connected to the inner wall of the side loading plate 500, and the second electronic expansion valve 262 and shut-off valve 263 are connected to the outer wall of the side loading plate 500, so that the heat pump assembly 200 is compactly arranged on the loading rack 100.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A vehicular heat pump device characterized by comprising: The system includes a loading rack (100) and a heat pump assembly (200). The loading rack (100) has a top partition plate (300) on its top. The side walls of the loading rack (100) include a plurality of side zones along its circumference. Two of the side zones are open and respectively form an air inlet (110) and an air outlet (120), and the air inlet (110) is configured to face the cooling fan of the vehicle. The remaining side zones are provided with side plates (40). The heat pump assembly (200) is located on the base (130) and side plate of the loading rack (100), and at least the compressor (210), condenser (220), evaporator (240) of the heat pump assembly (200) and the connecting pipes therebetween are located in the ventilation cavity (140) enclosed by the loading rack (100); a concentration sensor for detecting refrigerant concentration is provided in the ventilation cavity (140).

2. The vehicle-mounted heat pump apparatus according to claim 1, characterized by The side wall of the loading rack (100) includes four side zones along its circumference, the four side zones being a first side zone, a second side zone, a third side zone, and a fourth side zone in sequence. The first side zone is open relative to the third side zone to form the air inlet (110), and the second side zone is open relative to the fourth side zone to form the air outlet (120). The side plate (40) includes a side partition plate (400) provided in the third side zone and a side loading plate (500) provided in the fourth side zone.

3. The vehicle-mounted heat pump apparatus according to claim 1, characterized by, The side plate (40) and / or the top isolation plate (300) are provided with a wire hole (410), and an elastic isolation sheet (420) is sealed at the wire hole (410), and the elastic isolation sheet (420) is provided with a wire slot (421) that can deform and allow the pipeline to pass through.

4. The vehicle-mounted heat pump apparatus according to claim 1, characterized by, The bottom of the top isolation plate (300) is equipped with a fire extinguishing component.

5. The vehicle-mounted heat pump apparatus according to any one of claims 1 to 4, characterized by, The heat pump assembly (200) includes a compressor (210), a condenser (220), a heat exchange component (230), a first electronic expansion valve (261), and an evaporator (240). The heat exchange component (230) has a first heat exchange channel (231) and a second heat exchange channel (232). The compressor (210), the condenser (220), the first heat exchange channel (231), the first electronic expansion valve (261), and the evaporator (240) are sequentially connected through a main pipeline (281) to form a refrigerant circulation. The heat pump assembly (200) further includes a first branch pipe (282) and a second branch pipe (283). The first end of the first branch pipe (282) is connected to the section of the main pipe (281) located between the condenser (220) and the first heat exchange channel (231), and the second end is connected to the inlet of the second heat exchange channel (232). The first end of the second branch pipe (283) is connected to the outlet of the second heat exchange channel (232), and the second end is connected to the compressor (210). The first branch pipe (282) is provided with a second electronic expansion valve (262).

6. The vehicle-mounted heat pump device according to claim 5, characterized in that, The second branch pipe (283) is equipped with a first PT sensor (271); And / or, the main pipeline (281) is provided with a second PT sensor (272) in the section between the compressor (210) and the evaporator (240); And / or, the main pipeline (281) is provided with a third PT sensor (273) in the section between the compressor (210) and the condenser (220).

7. The vehicle-mounted heat pump apparatus according to claim 5, characterized by The main pipeline (281) located between the compressor (210) and the condenser (220) is equipped with a shut-off valve (263); And / or, the main pipeline (281) is provided with a reservoir (250) in the section between the condenser (220) and the first branch pipeline (282).

8. The vehicle heat pump apparatus according to any one of claims 1 to 4, characterized by, The base (130) is provided with a plurality of dispersed elastic damping members (600). Each elastic damping member (600) includes an upper damping part (610), a lower damping part (620), and a connecting part connecting the two. The connecting part is recessed relative to the upper damping part (610) and the lower damping part (620) to form an annular groove. The compressor (210) is provided with a connecting seat (211) at the bottom. The connecting seat (211) is provided with a plurality of connecting holes. The plurality of connecting holes are respectively fitted onto the connecting part of one of the elastic damping members (600) and sandwiched between the corresponding upper damping part (610) and the lower damping part (620).

9. A vehicle characterized by comprising: The vehicle includes a vehicle body and an on-board heat pump device as described in any one of claims 1-8, wherein the on-board heat pump device is located in the front end area of ​​the chassis of the vehicle body, and the air inlet (110) of the on-board heat pump device faces forward toward the cooling fan of the vehicle body; the cooling fan, the heat pump assembly (200) of the on-board heat pump device, and the concentration sensor are all communicatively connected to the controller of the vehicle body.

10. The vehicle of claim 9, wherein, The vehicle body is equipped with a collision sensor, which is communicatively connected to the controller.

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