Back-mounted air conditioner for excavator

Abstract

The utility model discloses a kind of excavator rear-mounted type cooling and heating air conditioners, it is related to engineering machinery air conditioning technical field, including evaporator assembly, compressor, condenser assembly, drying bottle subassembly, refrigerant pipeline and warm air water pipe.The compressor is connected and driven by belt with excavator engine;Evaporator assembly is installed in cab, condenser assembly is installed in water tank rear portion and borrows radiator fan;Warm air core and evaporative core are set in integrated box, realize hot air heating using engine cooling water;Refrigerant system realizes refrigeration by compression, condensation, throttling and evaporation circulation.The utility model is compact in structure, small in occupied space, realizes energy-saving heating using engine heat energy, and is suitable for cold and hot environment regulation of engineering machinery cab.

Description

Technical Field

[0001] This utility model relates to an air conditioner, and more particularly to a rear-mounted cooling and heating air conditioner for excavators that utilizes engine power and waste heat from the water tank, belonging to the field of air conditioning engineering technology. Background Technology

[0002] Traditional construction machinery has relatively simple operating facilities, with only a small fan for the operator in the cab. Air conditioning and heating are often lacking. Excavators and loaders, in particular, operate primarily in outdoor environments, making the operating conditions for operators in the cab extremely challenging. They endure freezing temperatures in winter and scorching heat in summer. Working in such a lack of humane facilities directly impacts work efficiency and can even lead to incidents of frostbite or heatstroke. Utility Model Content

[0003] The technical problem solved by this utility model is the harsh working environment for loader operators.

[0004] To solve the above-mentioned technical problems, the present invention provides a rear-mounted air conditioning unit for excavators, comprising:

[0005] Evaporator assembly, compressor, condenser assembly, dryer bottle assembly, and refrigerant piping and heating water piping connecting the above components;

[0006] The compressor is connected to the engine of the excavator through a compressor bracket, a tensioning device and a pulley to obtain driving power;

[0007] The evaporator assembly is installed on the right rear side of the cab, and the condenser assembly is installed at the rear of the water tank. The condenser assembly is cooled by the water tank's fan.

[0008] One end of the heating water pipe is connected to the hot water outlet of the engine water tank, and the other end is connected to the heating core inside the evaporator assembly to form a hot water circulation loop;

[0009] The evaporator assembly consists of a warm air core, an evaporator core, and an evaporator fan. The warm air core and the evaporator core are arranged side by side in the same housing. The evaporator fan is located in the lower layer of the housing. A water filter screen is provided between the evaporator core and the warm air core.

[0010] The refrigerant piping is sequentially connected to the evaporator assembly, compressor, condenser assembly and dryer bottle assembly, forming a closed refrigerant circulation path;

[0011] The air conditioner uses the engine belt to drive the compressor for cooling and the waste heat from the engine water tank for heating, thus providing a cooling and heating function for the cab.

[0012] Optionally, the evaporator assembly has a two-layer structure, with the evaporator core and the heater core installed in the upper layer, and the evaporator fan installed in the lower layer. The air outlet is located in the lower layer and is close to the air duct of the cab.

[0013] Optionally, the rear side of the housing is provided with an air inlet with air filter cotton for filtering particulate impurities in the incoming air.

[0014] Optionally, a water filter screen is provided between the evaporator core and the warm air core, as well as on the air outlet side of the warm air core, to prevent water droplets from entering the air duct system.

[0015] Optionally, the condenser assembly includes a condenser core and a bracket. The condenser core is fixed to the upper end of the condenser bracket by bolts, and a rubber pad is provided at the connection to mitigate the impact of vehicle vibration on the condenser.

[0016] Optionally, the condenser core and the dryer bottle assembly are connected via refrigerant piping, and the dryer bottle assembly is independently mounted on the excavator frame.

[0017] Optionally, the heating water pipe includes two water pipes, which are respectively connected to the inlet and outlet of the heating core, and respectively connected to the inlet and outlet of the engine cooling water, to realize hot water circulation heating.

[0018] Optionally, the compressor is mounted on the side of the engine and operates synchronously with the engine via a belt drive system.

[0019] Optionally, the air conditioning control switch panel has a waterproof and dustproof structure, making it suitable for use in outdoor environments of engineering vehicles.

[0020] Optionally, the refrigerant piping in the compressor refrigeration system includes:

[0021] The evaporator-compression line is used to connect the evaporator assembly outlet to the compressor inlet;

[0022] The compressor-cooling line is used to connect the compressor outlet to the condenser assembly inlet.

[0023] Cold storage piping, used to connect the condenser outlet and the dryer bottle inlet;

[0024] The storage-evaporation pipeline is used to connect the dryer bottle outlet to the evaporator inlet.

[0025] The pipes form a closed refrigerant loop.

[0026] The beneficial effects of this utility model's technical solution are:

[0027] This utility model connects the compressor to the drilling pulley of the excavator and loader and integrates the heating core and the array core. The heat source of the heating core is hot water from the engine cooling water tank. This not only effectively saves space occupied by the excavator and loader, but also provides heating to the cab without increasing energy consumption. This humanely improves the working environment of the operators, increases work efficiency, and ensures the health of the operators. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the air conditioner in this embodiment of the utility model;

[0029] Figure 2 This is a three-dimensional exploded view of the evaporator assembly in an embodiment of the present invention;

[0030] Figure 3 This is a three-dimensional exploded view of the condenser assembly in an embodiment of the present invention. Detailed implementation method:

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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 are not intended to 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.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 according to the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] Please see Figure 1 , Figure 2 and Figure 3 The diagram illustrates an embodiment of a rear-mounted air conditioning unit for an excavator loader, comprising an evaporator assembly, a compressor, a condenser assembly, a dryer assembly, and refrigerant piping and a heater hose connecting these components. The compressor is connected to the excavator loader's engine via a compressor bracket, a tensioning device, and a pulley to obtain driving power. The evaporator assembly is installed on the right rear side of the cab, and the condenser assembly is installed behind the water tank, utilizing the water tank's fan for heat dissipation. One end of the heater hose is connected to the hot water outlet of the engine water tank, and the other end is connected to the evaporator... The heater core within the air conditioning unit forms a hot water circulation loop; the evaporator assembly consists of a heater core, an evaporator core, and an evaporator fan, with the heater core and evaporator core arranged side-by-side in the same housing, the evaporator fan located in the lower layer of the housing, and a water filter screen installed between the evaporator core and the heater core; the refrigerant piping connects sequentially to the evaporator assembly, compressor, condenser assembly, and dryer assembly, forming a closed refrigerant circulation path; the air conditioning unit simultaneously utilizes the engine belt power to drive the compressor for cooling and the waste heat from the engine water tank for heating, providing heating and cooling functions for the cab.

[0037] In this embodiment, the evaporator assembly has a two-layer structure, with the evaporator core and the heater core installed on the upper layer, and the evaporator fan installed on the lower layer. The air outlet is located on the lower layer and is close to the air duct of the cab.

[0038] In this embodiment, an air inlet with air filter cotton is provided on the rear side of the box to filter particulate impurities in the incoming air.

[0039] In this embodiment, water filters are provided between the evaporator core and the warm air core, as well as on the air outlet side of the warm air core, to prevent water droplets from entering the air duct system.

[0040] In this embodiment, the condenser assembly includes a condenser core and a bracket. The condenser core is fixed to the upper end of the condenser bracket by bolts, and a rubber pad is provided at the connection to mitigate the impact of vehicle vibration on the condenser.

[0041] In this embodiment, the condenser core and the dryer bottle assembly are connected by a refrigerant pipeline, and the dryer bottle assembly is independently installed on the excavator frame.

[0042] In this embodiment, the heater water pipe includes two water pipes, which are respectively connected to the inlet and outlet of the heater core, and respectively connected to the inlet and outlet of the engine cooling water, to realize hot water circulation heating.

[0043] In this embodiment, the compressor is installed on the side of the engine and works synchronously with the engine through a belt drive system.

[0044] In this embodiment, the air conditioning control switch panel has a waterproof and dustproof structure, making it suitable for use in outdoor environments of engineering vehicles.

[0045] In this embodiment, the refrigerant piping in the compressor refrigeration system includes:

[0046] The evaporator-compression line is used to connect the evaporator assembly outlet to the compressor inlet;

[0047] The compressor-cooling line is used to connect the compressor outlet to the condenser assembly inlet.

[0048] Cold storage piping, used to connect the condenser outlet and the dryer bottle inlet;

[0049] The storage-evaporation pipeline is used to connect the dryer bottle outlet to the evaporator inlet.

[0050] The pipes form a closed refrigerant loop.

[0051] The following description will further illustrate the characteristics and functions of this utility model.

[0052] This embodiment is in Figure 1In one embodiment, a rear-mounted air conditioning unit for an excavator loader comprises an evaporator assembly 1, a compressor 2, a condenser assembly 3, a dryer bottle assembly 4, and piping. The compressor 2 is mounted on one side of the engine and connected to the engine pulley via a compressor bracket, tensioning device, and pulley. The evaporator assembly 1 is mounted behind the operator's right hand in the cab. The condenser assembly 3 is mounted behind the radiator. The piping consists of an evaporator-pressure line 6, a pressure-cooling line 7, a cooling-storage line 8, a storage-evaporator line 5, and a heater water pipe 10. The heater water pipe 10 is connected to the inlet and outlet of the heater core. The evaporator-pressure line 6 connects to the outlet of the evaporator assembly and the inlet of the compressor. The pressure-cooling line 7 connects to the outlet of the compressor and the inlet of the condenser. The cooling-storage line 8 connects to the outlet of the condenser and the inlet of the dryer bottle. The storage-evaporator line 5 connects to the outlet of the dryer bottle and the inlet of the evaporator.

[0053] exist Figure 2 In the embodiment, the evaporator assembly 1 includes a housing 16, an evaporator fan 11, an evaporator core 13, and a heater core 12. The housing 16 has a two-layer structure; the upper layer is equipped with the evaporator core 13 and the heater core 12, and the lower layer is equipped with the evaporator fan 11. The air outlet is attached to the blower outlet, and the air outlet faces downward and is directly attached to the air duct in the cab. A water filter 14 is installed between the evaporator core and the heater core; this structure is a suction device, and the water filter 14 is installed on the air outlet side of the heater core.

[0054] exist Figure 3 In the embodiment, the condenser assembly 3 includes a condenser bracket 19 and a condenser core 21. The condenser core is fixed to the upper end of the condenser bracket by bolts, and a rubber pad 20 is added at the connection to reduce vibration.

[0055] Example 1: This air conditioning system is suitable for excavator trucks. Install the compressor 2 in a suitable location next to the engine, install the evaporator assembly 1 inside the cab, and install the condenser assembly 3 behind the radiator. Connect the piping and perform adjustments.

[0056] Example 2: Open the water valve on the heater hose 10 leading to the engine water tank. Hot water from the engine water tank passes through the heater core 12 and heats the air absorbed in the cab. The evaporator fan 11 absorbs the heated air from the outlet side of the heater core and blows it into the cab through the outlet to heat the cab. The hot water in the engine continuously circulates, continuously heating the air in the cab and causing the interior temperature of the cab to rise.

[0057] Example 3: The engine drives compressor 2, drawing in low-temperature, low-pressure gaseous refrigerant. Compressor 2 converts the low-temperature, low-pressure gaseous refrigerant into high-temperature, high-pressure gaseous refrigerant, which is then discharged into condenser core 21 through pressure-cooling pipeline 7. The high-temperature, high-pressure gaseous refrigerant absorbs cold air from the outside as it flows within condenser core 21. After condensing the refrigerant into medium-temperature, high-pressure liquid refrigerant, it passes through cold-storage pipeline 8 into a dryer bottle, then through storage-evaporation pipeline 5, and after being throttled by the expansion valve, it enters evaporator core 13 for expansion and flows within evaporator core 13. The air in the cab is forced to circulate by evaporator fan 11, absorbing heat from the cab. After passing through evaporator assembly 1, the refrigerant becomes a low-pressure gas and enters the low-pressure end of compressor through vapor-pressure pipeline 6, undergoing another cycle. This process repeats, with the evaporator assembly continuously absorbing heat from the cab, achieving the effect of cooling the cab.

[0058] In summary, this utility model connects the compressor to the drilling pulley of the excavator and integrates the heating core and the array core into one unit. The heat source of the heating core is hot water from the engine cooling water tank. This not only effectively saves space occupied by the excavator and loader, but also provides heating to the cab without increasing energy consumption. This humanely improves the working environment of the operators, increases work efficiency, and ensures the health of the operators.

[0059] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rear-mounted air conditioning unit for excavators, characterized in that, include: Evaporator assembly, compressor, condenser assembly, dryer bottle assembly, and refrigerant piping and heating water piping connecting the above components; The compressor is connected to the engine of the excavator through a compressor bracket, a tensioning device and a pulley to obtain driving power; The evaporator assembly is installed on the right rear side of the cab, and the condenser assembly is installed at the rear of the water tank. The condenser assembly is cooled by the water tank's fan. One end of the heating water pipe is connected to the hot water outlet of the engine water tank, and the other end is connected to the heating core inside the evaporator assembly to form a hot water circulation loop; The evaporator assembly consists of a warm air core, an evaporator core, and an evaporator fan. The warm air core and the evaporator core are arranged side by side in the same housing. The evaporator fan is located in the lower layer of the housing. A water filter screen is provided between the evaporator core and the warm air core. The refrigerant piping is sequentially connected to the evaporator assembly, compressor, condenser assembly and dryer bottle assembly, forming a closed refrigerant circulation path; The air conditioner uses the engine belt to drive the compressor for cooling and the waste heat from the engine water tank for heating, thus providing a cooling and heating function for the cab.

2. The excavator-mounted rear-mounted air conditioning unit as described in claim 1, characterized in that, The evaporator assembly has a two-layer structure, with the evaporator core and the heater core installed in the upper layer, and the evaporator fan installed in the lower layer. The air outlet of the housing is located in the lower layer and is close to the air duct of the cab.

3. The excavator-mounted rear-mounted air conditioning unit as described in claim 1, characterized in that, The rear side of the housing is equipped with an air inlet with air filter cotton, which is used to filter particulate impurities in the incoming air.

4. The excavator-mounted rear-mounted air conditioning unit as described in claim 1, characterized in that, A water filter screen is provided between the evaporator core and the heater core, as well as on the air outlet side of the heater core, to prevent water droplets from entering the air duct system.

5. The excavator-mounted rear-mounted air conditioning unit as described in claim 1, characterized in that, The condenser assembly includes a condenser core and a bracket. The condenser core is fixed to the upper end of the condenser bracket by bolts, and a rubber pad is provided at the connection to mitigate the impact of vehicle vibration on the condenser.

6. The excavator-mounted rear-mounted air conditioning unit as described in claim 5, characterized in that, The condenser core and the dryer bottle assembly are connected by a refrigerant pipeline, and the dryer bottle assembly is independently installed on the excavator frame.

7. The excavator-mounted rear-mounted air conditioning unit as described in claim 1, characterized in that, The heater water pipe includes two water pipes, which are respectively connected to the inlet and outlet of the heater core, and respectively connected to the inlet and outlet of the engine coolant, to realize hot water circulation heating.

8. The excavator-mounted rear-mounted air conditioning unit as described in claim 1, characterized in that, The compressor is installed on the side of the engine and works synchronously with the engine via a belt drive system.

9. The excavator-mounted rear-mounted air conditioning unit as described in claim 1, characterized in that, The air conditioner's control switch panel has a waterproof and dustproof structure, making it suitable for use in outdoor environments for engineering vehicles.

10. The excavator-mounted rear-mounted air conditioning unit as described in claim 1, characterized in that, The refrigerant piping in the compressor refrigeration system includes: The evaporator-compression line is used to connect the evaporator assembly outlet to the compressor inlet; The compressor-cooling line is used to connect the compressor outlet to the condenser assembly inlet. Cold storage piping, used to connect the condenser outlet and the dryer bottle inlet; The storage-evaporation pipeline is used to connect the dryer bottle outlet to the evaporator inlet. The pipes form a closed refrigerant loop.

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