Climate control unit

Abstract

FIELD: air conditioning of vehicles.SUBSTANCE: air conditioning system consists of main units, structurally combined into a single device: an air cooling circuit, an air heating circuit, an air circulation circuit, an electrical components cabinet, and a control and indication unit. The air cooling circuit is connected to the air intake duct (15) from the cabin, containing an air cleaning filter (16). The air cooling circuit is divided into two sections: suction and discharge. The suction section contains an evaporator (9), a low-pressure refrigerant circulation pipeline (2.2), a compressor (7), a ball valve for shutting off the compressor on the suction side (5.2), a pressure gauge connection (3.2), a pressure gauge (4.2), a low-pressure sensor (8), a thermostatic expansion valve (14) and an inspection window (13). The discharge section contains a high-pressure refrigerant circulation pipeline (2.1), a high-pressure sensor (6), a ball valve for shutting off the compressor on the discharge side (5.1), a pressure gauge connection (3.1), a pressure gauge (4.1), a condenser (1), a receiver (10), a ball valve for replacing the filter dryer (5.3), a filter dryer (11), and a solenoid valve (12). The boundary between the suction and discharge parts passes through the compressor (7), the solenoid valve (12) and the air intake duct (15) from the cabin. The air cooling circuit also includes a sealed compressor unit filled with refrigerant and compressor oil. The air heating circuit is connected to the cooling circuit via the air duct of the centrifugal fan (18), which contains the centrifugal fan (17). The air heating circuit additionally contains an air supply duct (21) into the cabin, containing a box with a block of heating elements (19) and a maximum temperature monitoring sensor. The air circulation circuit passes through the operator's cabin, the air cooling circuit and the air heating circuit. The electrical component cabinet contains devices for converting, distributing, switching on and off the compressor (7), the high (6) and low (8) pressure relay sensor, the fan (17), the heating element unit (19) and the maximum temperature sensor (20) and is connected to the control and indication unit via an electric cable. The control and indication unit contains control elements in the form of operating mode switches and an air temperature sensor (22).EFFECT: autonomous operation of the air conditioning system is improved.1 cl, 1 dwg

Description

[0001] The proposed invention relates to air conditioning units with the ability to cool and heat the air in the cabins of vehicles and construction equipment.

[0002] Previous level of technology.

[0003] US Patent Application No. 20240308296 "CABIN CLIMATE CONTROL SYSTEM" is known.

[0004] The cabin climate control system includes a first circuit for circulating a refrigerant; a second circuit for circulating a liquid; an evaporator configured to transfer thermal energy to the refrigerant; a compressor configured to compress the refrigerant; a condenser configured to transfer thermal energy between the compressed refrigerant and a liquid in the second circuit; and a heat exchanger configured to remove thermal energy from the liquid in the second circuit. The cabin climate control system includes a heating mode in which it is configured to remove thermal energy from the air entering or circulating in the cabin through the evaporator, and then add the removed thermal energy and additional thermal energy generated by the work performed by the compressor back to the air entering or circulating in the cabin through the heat exchanger, so as to increase the temperature in the cabin.

[0005] The disadvantages of this solution are that the system can only function when the internal combustion engine is running; that the system can only use secondary heating antifreeze from the internal combustion engine circuit to heat the air.

[0006] The objective of the proposed invention is to create an air conditioning unit with an independent air heating circuit using electric heating elements, allowing the power of the heating elements to be selected without being tied to the power of the cooling system, as well as reducing the cost of producing air conditioning units.

[0007] The technical result of the proposed invention is that when using this system, it is possible to independently select the power of the heating elements without reference to the power of the cooling system and there is no need to integrate the system into the liquid circuit of a vehicle or construction equipment, and the proposed system can also operate independently without using power sources of a vehicle or construction equipment.

[0008] Disclosure of invention

[0009] The essence of the invention is explained by drawings, where:

[0010] Fig. 1. – Diagram of interconnected elements of the air conditioning system.

[0011] The technical result is achieved by the air conditioning system's housing, consisting of the main components structurally integrated into a single unit: an air cooling circuit, an air heating circuit, an air circulation circuit, an electrical component cabinet, and a control and display unit. The air cooling circuit is connected to the cabin air intake duct, which contains an air filter. The air cooling circuit is divided into two sections: the suction section and the discharge section. The suction section contains the evaporator, a low-pressure refrigerant circulation line, a compressor, a suction-side compressor shut-off ball valve, a pressure gauge connection, a pressure gauge, a low-pressure sensor, a thermostatic expansion valve, and a sight glass.The discharge section contains a high-pressure refrigerant circulation line, a high-pressure sensor, a discharge-side compressor shut-off ball valve, a pressure gauge connection, a pressure gauge, a condenser, a receiver, a filter-drier replacement ball valve, a filter-drier, and a solenoid valve. The boundary between the suction and discharge sections passes through the compressor, the solenoid valve, and the cabin air intake duct. The air cooling circuit also includes a sealed compressor unit filled with refrigerant and compressor oil. The air heating circuit is connected to the cooling circuit via a centrifugal fan duct containing a centrifugal fan. The air heating circuit additionally includes an air supply duct to the cabin, containing a box with a block of heating elements and a maximum temperature monitoring sensor. The air circulation circuit passes through the operator's cabin, the air cooling circuit, and the air heating circuit.The electrical component cabinet contains devices for conversion, distribution, and on / off control of the compressor, high- and low-pressure switch sensor, fan, heating element assembly, and maximum temperature sensor. It is connected to the control and display unit via an electrical cable. The control and display unit contains controls in the form of mode switches and an air temperature sensor.

[0012] The air conditioning unit is designed as a housing and consists of the main units structurally combined into a single device: an air cooling circuit, an air heating circuit, an air circulation circuit, an electrical component cabinet, and a control and display unit. The air cooling circuit is combined with an air intake duct (15) from the cabin, containing an air cleaning filter (16). The air cooling circuit is divided into two parts: a suction part and a discharge part. The suction part contains an evaporator (9), a low-pressure refrigerant circulation pipeline (2.2), a compressor (7), a ball valve for shutting off the compressor on the suction side (5.2), a pressure gauge nipple (3.2), a pressure gauge (4.2), a low pressure sensor (8), a thermostatic expansion valve (14), and an inspection window (13). The discharge part contains a high-pressure refrigerant circulation pipeline (2.1), a high-pressure sensor (6), a ball valve for shutting off the compressor on the discharge side (5.1), a pressure gauge connection (3.1), a pressure gauge (4.1), condenser (1), receiver (10), filter dryer replacement ball valve (5.3), filter dryer (11), solenoid valve (12). The boundary of the suction and discharge parts passes through the compressor (7), solenoid valve (12) and the air intake duct (15) from the cabin. The air cooling circuit also includes a sealed compressor unit filled with refrigerant and compressor oil. The air heating circuit is combined with the cooling circuit through the air duct of the centrifugal fan (18), which contains a centrifugal fan (17). The air heating circuit additionally contains an air supply duct (21) to the cabin, which contains a box with a block of heating elements (19) and a maximum temperature monitoring sensor. The air circulation circuit passes through the operator's cabin, the air cooling circuit and the air heating circuit.The electrical components cabinet contains devices for converting, distributing, and switching on and off the compressor (7), the high (6) and low (8) pressure relay sensor, the fan (17), the heating element unit (19), and the maximum temperature sensor (20) and is connected to the control and indication unit via an electric cable. The control and indication unit contains control elements in the form of operating mode switches and an air temperature sensor (22).

[0013] Air conditioning system operation method:

[0014] When the air conditioning system is turned on, the centrifugal fan (17) starts, pumping air through its duct (18) through the circulation circuit. Then, depending on the operator's selection on the control and display unit, one of the following modes is activated:

[0015] In the air cooling mode, the operation of the heating elements (19) is blocked. When the compressor (7) is turned on, the refrigerant flows through the high-pressure refrigerant circulation pipeline (2.1) through the ball valve (5.1), the fitting (3.1) and the pressure gauge (4.1) into the condenser (1). In the condenser, the refrigerant is cooled, then the cooled refrigerant passes through the receiver (10), the ball valve (5.3), the filter-drier (11), the solenoid valve (12), the inspection window (13), and enters through the thermostatic expansion valve (14) into the low-pressure pipeline (2.2), where it begins to evaporate and, passing through the evaporator (9), lowers the temperature of the air passing through the evaporator, thereby achieving cooling of the air circulating in the cabin.

[0016] In heating mode, the compressor (7) is disabled, and the heating element unit (19) is activated, heating the circulating air to the selected comfortable temperature in the cabin. The heating element power is regulated by the control unit. The maximum temperature control sensor (20) prevents the heating elements from overheating during operation, or in the event of fan failure or obstructed air circulation.

[0017] The air temperature in both modes is monitored by the control and indication unit via the air temperature sensor (22). Depending on the selected temperature on the unit and the temperature sensor readings, a control signal is transmitted to the electrical component unit to turn on / off one or another operating mode.

[0018] The air conditioning system is primarily used on electrical equipment and maintains its functionality even when the equipment is idle, but has a constant power source, which creates a comfortable atmosphere in the cabin for personnel even during downtime and equipment repairs at any time of the year.

[0019] List of items:

[0020] 1. capacitor

[0021] 2.1. High-pressure refrigerant circulation pipeline

[0022] 2.2. Low-pressure refrigerant circulation pipeline

[0023] 3.1. High pressure gauge connector

[0024] 3.2. Low pressure gauge connection

[0025] 4.1 High pressure gauge

[0026] 4.2 Low pressure gauge

[0027] 5.1. Compressor shut-off ball valve on the discharge side

[0028] 5.2. Compressor shut-off valve on the suction side

[0029] 5.3. Valve for replacing the filter dryer

[0030] 6. High pressure relay sensor

[0031] 7. compressor

[0032] 8. Low pressure switch sensor

[0033] 9. Evaporator

[0034] 10. receiver

[0035] 11. Filter drier

[0036] 12. Solenoid valve

[0037] 13. viewing window

[0038] 14. Thermostatic expansion valve

[0039] 15. Air intake duct from the cabin

[0040] 16. Air cleaning filter

[0041] 17. Centrifugal fan

[0042] 18. Centrifugal fan air duct

[0043] 19. block of heating elements

[0044] 20. Maximum temperature monitoring sensor

[0045] 21. Air supply duct to the cabin

[0046] 22. Cabin air temperature sensor

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