A heating, ventilation and air conditioning practical training system

Abstract

The utility model relates to a kind of heating ventilation air conditioning practical training system, comprising: refrigerating unit, the refrigerating unit includes compressor, condenser, thermal expansion valve and evaporator, the outlet of the compressor is connected with the cold coal circuit of condenser, the cold coal circuit outlet of the condenser is connected with the cold coal circuit of evaporator by thermal expansion valve, the cold coal circuit outlet of the evaporator is connected with the inlet of the compressor;Cooling water circulation system, the cooling water circulation system is used to cool the cold coal circuit in condenser cooling;Chilled water circulation system, the chilled water circulation system is used to and the cold coal circuit in evaporator heat exchange cooling and then delivery to each room to refrigerate.The utility model has the beneficial effect that: the heating ventilation air conditioning system miniaturization is integrated together, increases the convenience of practical training, improves the effect of practical training.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning training equipment technology, and in particular to a heating, ventilation and air conditioning training system. Background Technology

[0002] Currently, university teaching often adopts a combination of theory and practice to simulate real work environments, combining theoretical teaching with practical operation, thereby improving students' professional skills, practical experience and job adaptability, and achieving a match between talent cultivation and employment needs.

[0003] Heating, ventilation, and air conditioning (HVAC) systems use refrigeration equipment to provide cooling to offset indoor cooling loads and heating equipment to provide heat to offset indoor heat loads, forming a complete cooling and heating regulation mechanism. An air conditioning system includes air handling equipment, air delivery equipment, and distribution devices. The air handling equipment is responsible for the precise control of air parameters, such as temperature regulation and humidity control.

[0004] However, existing HVAC systems are bulky and the various devices are spaced far apart. In vocational schools, this often requires teachers and students to travel back and forth multiple times, resulting in low training efficiency and inconvenience in teaching demonstrations and operations, thus posing certain difficulties in teaching and training. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a heating, ventilation and air conditioning training system to solve the above problems.

[0006] The technical solution of this utility model is implemented as follows: A heating, ventilation, and air conditioning training system, comprising: A refrigeration unit includes a compressor, a condenser, a thermostatic expansion valve, and an evaporator. The condenser has a cooling water circuit and a refrigerant circuit that are isolated from each other and exchange heat. The evaporator has a chilled water circuit and a refrigerant circuit that are isolated from each other and exchange heat. The outlet of the compressor is connected to the refrigerant circuit of the condenser. The outlet of the refrigerant circuit of the condenser is connected to the refrigerant circuit of the evaporator through the thermostatic expansion valve. The outlet of the refrigerant circuit of the evaporator is connected to the inlet of the compressor. A cooling water circulation system is connected to the cooling water circuit of the condenser and is used to cool and reduce the temperature of the refrigerant circuit inside the condenser. A chilled water circulation system is connected to the chilled water circuit of the evaporator and is used to exchange heat with the refrigerant circuit in the evaporator for cooling before being delivered to each room for refrigeration. A control box, used for automatic control and monitoring of the system; A water heater connected to a chilled water circulation system for heating the room.

[0007] By adopting the above technical solution, the compressor draws in low-temperature, low-pressure refrigerant and compresses it into high-temperature, high-pressure gaseous refrigerant. The high-temperature, high-pressure gaseous refrigerant enters the condenser, where it carries away heat through the cooling water circulation system and condenses into high-pressure liquid refrigerant. The high-pressure liquid refrigerant is then throttled and depressurized by the thermostatic expansion valve, becoming a low-temperature, low-pressure gas-liquid mixture. It then enters the evaporator, absorbs heat from the chilled water in the chilled water circulation system, evaporates and absorbs heat, becoming a low-temperature, low-pressure gaseous refrigerant, which returns to the compressor to complete the refrigeration cycle. Simultaneously, the chilled water in the chilled water circulation system is cooled by absorbing heat and is delivered to each room for cooling. The water heater is used to simulate a hot water boiler. By shutting down the refrigeration unit and the cooling water circulation system and starting the water heater, the chilled water circulation system becomes a hot water circulation system, achieving the purpose of heating the rooms. The miniaturized integration of the HVAC system makes it easier and more intuitive to observe and detect the conditions of each room when adjusting the refrigeration unit, increasing the convenience of training and improving the effectiveness of training.

[0008] The present invention is further configured such that the cooling water circulation system includes: A cooling water tower, which is connected to the cooling water circuit of the condenser, is used to cool and reduce the temperature of the cooling water sent from the cooling water circuit of the condenser. A cooling water pump is used to pump the cooling water after it has been cooled down by the cooling tower into the cooling water circuit of the condenser.

[0009] By adopting the above technical solution, the cooling water pump delivers the low-temperature cooling water from the cooling tower to the cooling water circuit of the condenser, removing the heat from the cooling coal circuit of the condenser. Then, the high-temperature cooling water flows back to the cooling tower and is cooled by spraying and fan cooling. The water then flows back to the cooling tower pool for collection, completing the cooling cycle.

[0010] The present invention is further configured such that the chilled water circulation system includes: The water distributor includes multiple inlets and multiple outlets. The inlets of the water distributor are connected to the chilled water circuit outlet of the evaporator, and the outlets of the water distributor are connected to each room. A water collector, comprising multiple inlets and multiple outlets, wherein the inlets of the water collector are connected to various rooms; A chilled water pump, which is connected to the outlet of the water collector and the chilled water circuit inlet of the evaporator.

[0011] By adopting the above technical solution, the chilled water pump cools the chilled water through the chilled water circuit of the evaporator, and then sends it to the fan coil units of each room through the water distributor. The chilled water absorbs heat in each room, and then flows back to the water collector and back to the evaporator to cool again.

[0012] This utility model is further configured to include: An expansion tank, which is connected to an external water source and the inlet of a water collector.

[0013] By adopting the above technical solution, the expansion tank is used to contain and compensate for the expansion and contraction of water in the system, so as to regulate the system pressure and maintain the stable operation of the system.

[0014] The present invention is further configured such that the water outlet and water inlet of the water heater are respectively connected to the water inlet of the water distributor and the water outlet of the water collector.

[0015] By adopting the above technical solution, the water heater delivers heated water to the fan coil units in each room through the water distributor, thereby heating each room. The heated and cooled water is collected and flows back to the water collector, and then returns to the water heater for reheating.

[0016] The present invention is further configured such that a filter, a sight glass, and a solenoid valve are connected between the front end of the thermal expansion valve and the refrigerant circuit of the condenser.

[0017] By adopting the above technical solutions, the filter can effectively filter impurities and avoid system damage; the sight glass is used to observe the liquid level and flow of refrigerant in the liquid pipeline.

[0018] The present invention is further configured such that the refrigeration unit, cooling water circulation system, chilled water circulation system and water heater are all mounted on the bracket, and the control box is located on one side of the bracket.

[0019] By adopting the above technical solution, the HVAC system is miniaturized and integrated onto the bracket, which effectively improves the convenience of practical training operations and increases training efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a system flowchart of this utility model. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1-2 As shown, this utility model discloses a heating, ventilation, and air conditioning (HVAC) training system, including a refrigeration unit 1, a cooling water circulation system 2, a chilled water circulation system 3, a control box 4, a water heater 5, and a simulation room. The refrigeration unit 1 includes a compressor 10, a condenser 11, a thermostatic expansion valve 12, and an evaporator 13. The condenser 11 has a cooling water circuit and a refrigerant circuit that are isolated from each other and exchange heat. The evaporator 13 has a chilled water circuit and a refrigerant circuit that are isolated from each other and exchange heat. The outlet of the compressor 10 is connected to the refrigerant circuit of the condenser 11, and the outlet of the refrigerant circuit of the condenser 11 is connected to the evaporator 13 through the thermostatic expansion valve 12. The refrigerant circuit of evaporator 13 is connected to the inlet of compressor 10. Cooling water circulation system 2 is connected to cooling water circuit of condenser 11 to cool the refrigerant circuit in condenser 11. Chilled water circulation system 3 is connected to chilled water circuit of evaporator 13 to exchange heat with the refrigerant circuit in evaporator 13 and then deliver it to each room for refrigeration. Control box 4 is used for automatic control and monitoring of the system. Water heater 5 is connected to chilled water circulation system 3 to heat the room. The simulation room includes simulated guest rooms 6 and simulated lobby 7. Chilled water circulation system 3 is connected to the simulation room. Compressor 10 draws in low-temperature, low-pressure refrigerant and compresses it into high-temperature, high-pressure gaseous refrigerant. This high-temperature, high-pressure gaseous refrigerant enters condenser 11, where it carries away heat through cooling water circulation system 2, condensing into high-pressure liquid refrigerant. The high-pressure liquid refrigerant is then throttled and depressurized by thermal expansion valve 12, becoming a low-temperature, low-pressure gas-liquid mixture. It then enters evaporator 13, absorbing heat from the chilled water in chilled water circulation system 3, evaporating and absorbing heat, becoming low-temperature, low-pressure gaseous refrigerant again, returning to the compressor to complete the refrigeration cycle. Simultaneously, the chilled water in chilled water circulation system 3 absorbs heat and is cooled, then delivered to various rooms for cooling. Water heater 5 simulates a hot water boiler. By shutting down refrigeration unit 1 and cooling water circulation system 2 and starting water heater 5, chilled water circulation system 3 becomes a hot water circulation system, achieving the purpose of heating the simulated room. The simulated room replaces guest rooms and the lobby, miniaturizing and integrating the HVAC system. This allows for more convenient and intuitive observation and monitoring of guest rooms and the lobby when adjusting refrigeration unit 1, increasing the convenience and effectiveness of the training.

[0024] In this embodiment of the invention, the cooling water circulation system 2 includes a cooling tower 20 and a cooling water pump 21. The cooling tower 20 is connected to the cooling water circuit of the condenser 11 and is used to cool the cooling water sent from the cooling water circuit of the condenser 11. The cooling water pump 21 pumps the cooled water from the cooling tower 20 into the cooling water circuit of the condenser 11. The cooling water pump 21 pumps the low-temperature cooling water from the cooling tower 20 into the cooling water circuit of the condenser 11, removing heat from the cooling water circuit of the condenser 11. Then, the high-temperature cooling water flows back to the cooling tower 20, where it is cooled by spraying and fan cooling. Finally, it flows back to the water tank of the cooling tower 20 for collection, completing the cooling cycle.

[0025] In this embodiment of the invention, the chilled water circulation system 3 includes a water distributor 30, a water collector 31, and a chilled water pump 32. The water distributor 30 includes multiple inlets and multiple outlets. The inlets of the water distributor 30 are connected to the chilled water circuit outlet of the evaporator 13, and the outlets of the water distributor 30 are connected to each room. The water collector 31 includes multiple inlets and multiple outlets. The inlets of the water collector 31 are connected to each room. The chilled water pump 32 is connected to the outlet of the water collector 31 and the chilled water circuit inlet of the evaporator 13. The chilled water pump 32 cools the chilled water through the chilled water circuit of the evaporator 13, and then sends it through the water distributor 30 to the fan coil units of the simulated guest rooms 6 and the simulated lobby 7. The chilled water absorbs heat through the simulated guest rooms 6 and the simulated lobby 7, then flows back to the water collector 31, and then back to the evaporator 13 for recooling.

[0026] In this embodiment of the invention, both the simulated guest room 6 and the simulated lobby 7 are equipped with fan coil units, which are respectively connected to the outlet of the water distributor 30 and the inlet of the water collector 31. Chilled water is used to cool the simulated guest room 6 and the simulated lobby 7 through the fan coil units.

[0027] In this embodiment of the invention, an expansion tank 8 is also included, which is connected to an external water source and the inlet of the water collector 31. The expansion tank 8 is used to contain and compensate for the expansion and contraction of water in the system, so as to regulate the system pressure and maintain stable system operation.

[0028] In this embodiment of the invention, the outlet and inlet of the water heater 5 are respectively connected to the inlet of the water distributor 30 and the outlet of the water collector 31. The water heater 5 delivers heated water through the water distributor 30 to the fan coil units of the simulated guest rooms 6 and the simulated lobby 7, thereby heating each room. The heated and cooled water flows back to the water collector 31 and then back to the water heater 5 for reheating.

[0029] In this embodiment of the invention, a filter 14, a sight glass 15, and a solenoid valve 16 are connected between the front end of the thermal expansion valve 12 and the refrigerant circuit of the condenser 11. The filter 14 can effectively filter impurities to prevent system damage; the sight glass 15 is used to observe the liquid level and flow of refrigerant in the liquid pipeline.

[0030] In this embodiment of the invention, the simulated guest room 6 and / or simulated lobby 7 are equipped with temperature and humidity sensors, carbon dioxide sensors, differential pressure sensors, smoke sensors, supply air valves, fresh air valves, and exhaust fans. The temperature and humidity sensors detect the temperature and humidity in the room to control the fan coil units to shut down; the carbon dioxide sensors detect the carbon dioxide concentration in the room to control the fresh air valves and adjust the flow rate of fresh air; the smoke sensors detect smoke in the room to determine if a fire has occurred and control the exhaust fan and supply air valves.

[0031] In this embodiment of the invention, the refrigeration unit 1, the cooling water circulation system 2, the chilled water circulation system 3, and the water heater 5 are all mounted on a bracket, and the control box 4 is located on one side of the bracket. Miniaturizing and integrating the HVAC system onto the bracket effectively improves the convenience and efficiency of practical training operations.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heating, ventilation, and air conditioning (HVAC) training system, characterized in that, include: The refrigeration unit (1) includes a compressor (10), a condenser (11), a thermal expansion valve (12), and an evaporator (13). The condenser (11) is provided with a cooling water circuit and a refrigerant circuit that are isolated from each other and exchange heat. The evaporator (13) is provided with a chilled water circuit and a refrigerant circuit that are isolated from each other and exchange heat. The outlet of the compressor (10) is connected to the refrigerant circuit of the condenser (11). The outlet of the refrigerant circuit of the condenser (11) is connected to the refrigerant circuit of the evaporator (13) through the thermal expansion valve (12). The outlet of the refrigerant circuit of the evaporator (13) is connected to the inlet of the compressor (10). Cooling water circulation system (2), the cooling water circulation system (2) is connected to the cooling water circuit of the condenser (11) and is used to cool down the cooling coal circuit in the condenser (11); Chilled water circulation system (3), the chilled water circulation system (3) is connected to the chilled water circuit of the evaporator (13), and is used to exchange heat with the refrigerant circuit in the evaporator (13) for cooling and then transport to each room for refrigeration; Control box (4), the control box (4) is used for automatic control and monitoring of the system; A water heater (5) is connected to a chilled water circulation system (3) for heating the room.

2. The HVAC training system according to claim 1, characterized in that, The cooling water circulation system (2) includes: Cooling tower (20), the cooling tower (20) is connected to the cooling water circuit of the condenser (11) and is used to cool and reduce the temperature of the cooling water sent from the cooling water circuit of the condenser (11); Cooling water pump (21) is used to pump the cooling water after the cooling tower (20) has cooled down to the cooling water circuit of the condenser (11).

3. The HVAC training system according to claim 1, characterized in that, The chilled water circulation system (3) includes: Water distributor (30), the water distributor (30) includes multiple inlets and multiple outlets, the inlets of the water distributor (30) are connected to the chilled water circuit outlet of the evaporator (13), and the outlets of the water distributor (30) are connected to each room. Water collector (31), the water collector (31) includes multiple inlets and multiple outlets, the inlets of the water collector (31) are connected to each room; Chilled water pump (32), which is connected to the outlet of water collector (31) and the chilled water circuit inlet of evaporator (13).

4. The HVAC training system according to claim 3, characterized in that, Also includes: An expansion tank (8) is connected to an external water source and the inlet of a water collector (31).

5. The HVAC training system according to claim 3, characterized in that, The outlet and inlet of the water heater (5) are respectively connected to the inlet of the water distributor (30) and the outlet of the water collector (31).

6. The HVAC training system according to claim 1, characterized in that, A filter (14), a sight glass (15), and a solenoid valve (16) are connected between the front end of the thermal expansion valve (12) and the refrigerant circuit of the condenser (11).

7. The HVAC training system according to claim 1, characterized in that, The refrigeration unit (1), cooling water circulation system (2), chilled water circulation system (3) and water heater (5) are all mounted on the bracket, and the control box (4) is located on one side of the bracket.

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