All-weather skid-mounted cold and hot water unit

Abstract

The utility model relates to the technical field of water chiller-heater units, in particular to an all-weather skid-mounted water chiller-heater unit. The system comprises a compressor, an exhaust port of the compressor is connected with an air inlet of a three-way electromagnetic valve through a pipeline, a first air outlet of the three-way electromagnetic valve is connected with an air inlet of a condenser through a pipeline, and a liquid outlet of the condenser is connected with a liquid inlet of a second electromagnetic valve through a pipeline. A liquid outlet of the second electromagnetic valve is connected with a liquid inlet of the second expansion valve through a pipeline, and a liquid outlet of the second expansion valve is connected with a liquid inlet of the evaporator through a pipeline. According to the utility model, a steam compression refrigeration mode and a condensation heat recovery mode are adopted for heating, cold and heat are simultaneously utilized and stored in water in the cold and hot water tanks, a cold source and a heat source are simultaneously provided for equipment or places with cold and heat source requirements, and the energy-saving and environment-friendly effects are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cold and hot water units, in particular to an all-weather skid-mounted cold and hot water unit. Background Art

[0002] At present, the hot and cold water units used in the market cannot provide cooling while heating, and cannot provide heating while cooling. When heating, the cold energy generated by the unit is discharged into the atmosphere, and when cooling, the heat is discharged into the atmosphere. If the equipment needs to provide cooling and heating at the same time, only two hot and cold water units can be used, one for cooling and the other for heating. The initial investment cost is high, the operating cost is high, the energy waste is serious, and a large amount of heat is discharged into the atmosphere, which damages the environment. At the same time, the hot and cold water units used in the prior art do not have a water system inside. Users need to reconfigure and install water pumps, water tanks, water filters, various water valves and water pipes, etc. The installation is complicated, and it is difficult to optimize the space of the entire system, and it occupies a large space. Utility Model Content

[0003] In view of the shortcomings of the above-mentioned existing production technology, the present application provides a rationally structured all-weather skid-mounted hot and cold water unit, which adopts vapor compression refrigeration and heat recovery by means of condensation heat, utilizes cold and heat at the same time, stores them in the water of cold and hot water tanks, and provides cold and heat sources for equipment or places with cold and heat source requirements at the same time, thereby achieving energy-saving and environmental protection effects.

[0004] The technical solution adopted by the utility model is as follows:

[0005] An all-weather skid-mounted hot and cold water unit comprises a compressor, wherein the exhaust port of the compressor is connected to the air inlet of a three-way solenoid valve through a pipeline, the first air outlet of the three-way solenoid valve is connected to the air inlet of a condenser through a pipeline, the liquid outlet of the condenser is connected to the liquid inlet of a second solenoid valve through a pipeline, the liquid outlet of the second solenoid valve is connected to the liquid inlet of a second expansion valve through a pipeline, the liquid outlet of the second expansion valve is connected to the liquid inlet of an evaporator through a pipeline, the air outlet of the evaporator is connected to the air inlet of a gas-liquid separator through a pipeline, and the air outlet of the gas-liquid separator is connected to the air intake of the compressor through a pipeline; The second air outlet of the three-way solenoid valve is connected to the air inlet of the finned heat exchanger through a pipeline, the liquid outlet of the finned heat exchanger is connected to the liquid inlet of the liquid separator through a pipeline, the liquid outlet of the liquid separator is connected to the liquid inlet of the second one-way valve through a pipeline, the liquid outlet of the second one-way valve is connected to the liquid inlet of the second solenoid valve through a pipeline, a first expansion valve is arranged in parallel on one side of the second one-way valve, and both ends of the first expansion valve are respectively connected to the liquid separator and the second solenoid valve; one end of the finned heat exchanger is connected to the air inlet of the first solenoid valve, and the air outlet of the first solenoid valve is connected to the air inlet of the gas-liquid separator through a pipeline.

[0006] Furthermore, a first one-way valve is arranged on the pipeline connected to the liquid outlet of the condenser, and the first one-way valve can allow the refrigerant liquid to flow out from the liquid outlet of the condenser in one direction.

[0007] Furthermore, a second drying filter is arranged on the pipeline connected to the liquid outlet of the condenser.

[0008] Furthermore, a first drying filter is arranged on the pipeline connected to the first expansion valve.

[0009] Furthermore, high and low pressure lead-out points are taken on the exhaust pipe and the suction pipe of the compressor, and the high and low pressure lead-out points are connected to the high and low pressure controllers through pipes.

[0010] Furthermore, the water outlet of the condenser is connected to the circulating water inlet of the hot water tank through a pipe, the circulating water outlet of the hot water tank is connected to the water inlet of the condenser through a pipe, a cooling water pump is arranged on the pipe between the water inlet of the condenser and the circulating water outlet of the hot water tank, and the hot water outlet of the hot water tank is connected to the heat pump.

[0011] Furthermore, the water outlet of the evaporator is connected to the circulating water inlet of the cold water tank through a pipe, the circulating water outlet of the cold water tank is connected to the water inlet of the evaporator through a pipe, a chilled water pump is arranged on the pipe between the water inlet of the evaporator and the circulating water outlet of the cold water tank, and the water outlet of the cold water tank is connected to the cooling pump.

[0012] Furthermore, an exhaust fan is provided on one side of the fin heat exchanger.

[0013] The beneficial effects of the utility model are as follows:

[0014] The utility model adopts vapor compression refrigeration and heat recovery to recover condensation heat, utilizes cold and heat at the same time, stores them in the water of cold and hot water tanks, and provides cold and heat sources for equipment or places with cold and heat source requirements at the same time, achieving energy saving and environmental protection effects; during the use of the utility model, when the cold and heat demand is uneven and there is excess cold or heat, the unit will automatically switch to the finned heat exchanger, discharge the excess heat into the atmosphere or absorb insufficient heat from the atmosphere, so that the unit can operate around the clock; the utility model adopts an overall skid-mounted structure, which reduces the installation of the cold and hot water system, and is simple and reliable. The entire water system is space-optimized and reasonably installed on a skid-mounted chassis, occupying little space. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model.

[0016] Among them: 1. compressor; 2. three-way solenoid valve; 3. condenser; 4. first one-way valve; 5. exhaust fan; 6. first solenoid valve; 7. finned heat exchanger; 8. liquid distributor; 9. first expansion valve; 10. second one-way valve; 11. first drying filter; 12. second drying filter; 13. high and low pressure controller; 14. gas-liquid separator; 15. second solenoid valve; 16. second expansion valve; 17. evaporator; 18. chilled water pump; 19. cold water tank; 20. cooling pump; 21. heating pump; 22. hot water tank; 23. cooling water pump. DETAILED DESCRIPTION

[0017] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0018] like Figure 1 As shown, the all-weather skid-mounted hot and cold water unit includes a compressor 1, an exhaust port of the compressor 1 is connected to an air inlet of a three-way solenoid valve 2 through a pipeline, a first air outlet of the three-way solenoid valve 2 is connected to an air inlet of a condenser 3 through a pipeline, a liquid outlet of the condenser 3 is connected to a liquid inlet of a second solenoid valve 15 through a pipeline, a liquid outlet of the second solenoid valve 15 is connected to a liquid inlet of a second expansion valve 16 through a pipeline, a liquid outlet of the second expansion valve 16 is connected to a liquid inlet of an evaporator 17 through a pipeline, an air outlet of the evaporator 17 is connected to an air inlet of a gas-liquid separator 14 through a pipeline, and an air outlet of the gas-liquid separator 14 is connected to an air intake of the compressor 1 through a pipeline.

[0019] like Figure 1 As shown, the second air outlet of the three-way solenoid valve 2 is connected to the air inlet of the finned heat exchanger 7 through a pipeline, the liquid outlet of the finned heat exchanger 7 is connected to the liquid inlet of the liquid distributor 8 through a pipeline, the liquid outlet of the liquid distributor 8 is connected to the liquid inlet of the second one-way valve 10 through a pipeline, and the liquid outlet of the second one-way valve 10 is connected to the liquid inlet of the second solenoid valve 15 through a pipeline. The first expansion valve 9 is arranged in parallel on one side of the second one-way valve 10, and the two ends of the first expansion valve 9 are respectively connected to the liquid distributor 8 and the second solenoid valve 15.

[0020] like Figure 1 As shown, one end of the finned heat exchanger 7 is connected to the air inlet of the first solenoid valve 6, and the air outlet of the first solenoid valve 6 is connected to the air inlet of the gas-liquid separator 14 through a pipeline.

[0021] like Figure 1 As shown, an exhaust fan 5 is arranged on one side of the finned heat exchanger 7 .

[0022] like Figure 1 As shown, a first one-way valve 4 is arranged on the pipeline connected to the liquid outlet of the condenser 3 , and the first one-way valve 4 can allow the refrigerant liquid to flow out from the liquid outlet of the condenser 3 in one direction.

[0023] like Figure 1As shown, a second drying filter 12 is arranged on the pipeline connected to the liquid outlet of the condenser 3, and the second drying filter 12 can dry and filter the moisture and impurities in the refrigerant liquid in the pipeline.

[0024] like Figure 1 As shown, a first drying filter 11 is arranged on the pipeline connected to the first expansion valve 9, and the first drying filter 11 can dry and filter the moisture and impurities in the refrigerant liquid in the pipeline.

[0025] like Figure 1 As shown, high and low pressure lead-out points are taken on the exhaust pipe and the suction pipe of the compressor 1, and the high and low pressure lead-out points are connected to the high and low pressure controller 13 through pipes. The high and low pressure controller 13 detects the high and low pressures of the compressor 1 unit when it is running, and shuts down protectively when it exceeds the set value.

[0026] like Figure 1 As shown, the water outlet of the condenser 3 is connected to the circulating water inlet of the hot water tank 22 through a pipeline, and the circulating water outlet of the hot water tank 22 is connected to the water inlet of the condenser 3 through a pipeline. A cooling water pump 23 is arranged on the pipeline between the water inlet of the condenser 3 and the circulating water outlet of the hot water tank 22. The hot water outlet of the hot water tank 22 is connected to the heat supply pump 21.

[0027] like Figure 1 As shown, the water outlet of the evaporator 17 is connected to the circulating water inlet of the cold water tank 19 through a pipeline, and the circulating water outlet of the cold water tank 19 is connected to the water inlet of the evaporator 17 through a pipeline. A chilled water pump 18 is arranged on the pipeline between the water inlet of the evaporator 17 and the circulating water outlet of the cold water tank 19, and the water outlet of the cold water tank 19 is connected to a cooling pump 20.

[0028] The utility model adopts vapor compression refrigeration and heat recovery to recover condensation heat at the same time, utilizing cold and heat at the same time and storing them in the water of cold and hot water tanks, providing cold and heat sources for equipment or places with cold and heat source requirements at the same time, achieving energy-saving and environmental protection effects. During the use of the utility model, when the cold and heat demand is uneven and there is excess cold or heat, the unit will automatically switch to a finned heat exchanger to discharge the excess heat into the atmosphere or absorb insufficient heat from the atmosphere, so that the unit can operate around the clock. The utility model adopts an overall skid-mounted structure, which reduces the installation of the hot and cold water system and is simple and reliable. The entire water system is designed with space optimization and is reasonably installed on a skid-mounted chassis, occupying little space.

[0029] The operation process of the utility model is as follows: the high-temperature and high-pressure gas discharged from the compressor 1 enters the condenser 3 through the three-way heat recovery solenoid valve 2 (at this time, the direction of the three-way heat recovery solenoid valve 2 leading to the fin-tube heat exchanger 7 is closed, and the first solenoid valve 6 is closed), the high-temperature and high-pressure refrigerant gas condenses and releases heat in the condenser 3, and becomes a high-temperature and high-pressure refrigerant liquid. The heat released by the condensation of the refrigerant is taken away by the cooling water flowing through the condenser 3, and the cooling water pump 23 provides power to circulate the cooling water between the condenser 3 and the hot water tank 22, and supplies heat to the hot water tank 22. The water temperature rises, and the high-temperature and high-pressure refrigerant liquid flows to the second expansion valve 16 through the first one-way valve 4, the second drying filter 12, and the second solenoid valve 15. After being throttled by the second expansion valve 16, it becomes a low-temperature and low-pressure gas-liquid two-phase mixture. The low-temperature and low-pressure gas-liquid two-phase mixture enters the evaporator 17. The refrigerant vaporizes and absorbs heat in the evaporator 17, absorbs heat from the cold water flowing through the evaporator 17, and cools the cold water. The chilled water pump 18 provides power to circulate the cold water between the evaporator 17 and the cold water tank 19, and cools the cold water in the cold water tank 19. After the refrigerant vaporizes in the evaporator 17, it flows to the gas-liquid separator 14, is separated into gas and liquid in the gas-liquid separator 14, and is sucked into the compressor 1, discharged after being pressurized, and enters the next cycle. The high and low pressure controller 13 detects the high and low pressures when the unit is running, and shuts down protectively when it exceeds the set value.

[0030] The heat supply pump 21 draws hot water from the hot water tank 22, pressurizes it and sends it to the heat-using equipment, and then flows back to the hot water tank 22 after heat exchange and temperature reduction in the heat-using equipment.

[0031] The cooling pump 20 draws the cold water in the cold water tank 19, pressurizes it and sends it to the cold equipment, and then flows back to the cold water tank 19 after heat exchange and temperature increase in the cold equipment.

[0032] When the utility model is used for cooling and heating, if the demand for cooling capacity is small, when the water temperature in the cold water tank 19 is as low as the limit, the first solenoid valve 6 is opened, the second solenoid valve 15 is closed, and the high-temperature and high-pressure gas discharged from the compressor 1 enters the condenser 3 through the three-way solenoid valve 2 (at this time, the direction of the three-way solenoid valve 2 to the fin-tube heat exchanger 7 is closed), and the high-temperature and high-pressure refrigerant gas condenses and releases heat in the condenser 3 to become a high-temperature and high-pressure refrigerant liquid. The heat released by the condensation of the refrigerant is taken away by the cooling water flowing through the condenser 3, and the cooling water pump 23 provides power to circulate the cooling water between the condenser 3 and the hot water tank 22. The circulation flow raises the temperature of the water in the hot water tank 22. The high-temperature and high-pressure refrigerant liquid flows to the first expansion valve 9 through the first non-return valve 4 and the first drying filter 11. After being throttled by the first expansion valve 9, it becomes a low-temperature and low-pressure gas-liquid two-phase mixture. The low-temperature and low-pressure gas-liquid two-phase mixture enters the finned heat exchanger 7 (the finned heat exchanger is used as an evaporator at this time) through the liquid separator 8. The refrigerant vaporizes and absorbs heat in the tube of the finned heat exchanger 7, absorbs heat from the air flowing outside the tube of the finned heat exchanger 7, and cools the air flowing through the finned heat exchanger 7. The exhaust fan 5 provides power to discharge the cooled cold air into the atmosphere. After the refrigerant vaporizes in the tube of the finned heat exchanger 7, it flows to the gas-liquid separator 14, is separated into gas and liquid in the gas-liquid separator 14, and is sucked into the compressor 1, discharged after pressurization, and enters the next cycle.

[0033] When the utility model provides cooling or heating, if the demand for heat is small, when the water temperature in the hot water tank 22 reaches a limit, the first solenoid valve 6 is closed, the second solenoid valve 15 is opened, and the high-temperature and high-pressure gas discharged from the compressor 1 enters the finned heat exchanger 7 through the three-way solenoid valve 2 (at this time, the direction of the three-way solenoid valve 2 to the condenser 3 is closed), and the high-temperature and high-pressure refrigerant gas condenses and releases heat in the tube of the finned heat exchanger 7 (at this time, the finned heat exchanger 7 is used as a condenser), and becomes a high-temperature and high-pressure refrigerant liquid. The heat released by the condensation of the refrigerant is taken away by the air flowing through the outside of the tube of the finned heat exchanger 7, and the exhaust fan 5 provides power to discharge the heated hot air into the atmosphere. The high-temperature and high-pressure refrigerant liquid flows to the second expansion valve 16 through the liquid separator 8, the second one-way valve 10, the first filter dryer 11, the second filter dryer 12, and the second solenoid valve 15. After being throttled by the second expansion valve 16, it becomes a low-temperature and low-pressure gas-liquid two-phase mixture. The low-temperature and low-pressure gas-liquid two-phase mixture enters the evaporator 17. The refrigerant vaporizes and absorbs heat in the evaporator 17, absorbs heat from the cold water flowing through the evaporator 17, and cools the cold water. The chilled water pump 18 provides power to circulate the cold water between the evaporator 17 and the cold water tank 19, and cools the cold water in the cold water tank 19. After being vaporized in the evaporator 17, the refrigerant flows to the gas-liquid separator 14, is sucked into the compressor 1 after gas-liquid separation in the gas-liquid separator 14, and is discharged after being pressurized to enter the next cycle.

[0034] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. An all-weather skid-mounted hot and cold water unit, comprising a compressor (1), characterized in that: The exhaust port of the compressor (1) is connected to the air inlet of the three-way solenoid valve (2) through a pipeline, the first air outlet of the three-way solenoid valve (2) is connected to the air inlet of the condenser (3) through a pipeline, the liquid outlet of the condenser (3) is connected to the liquid inlet of the second solenoid valve (15) through a pipeline, the liquid outlet of the second solenoid valve (15) is connected to the liquid inlet of the second expansion valve (16) through a pipeline, the liquid outlet of the second expansion valve (16) is connected to the liquid inlet of the evaporator (17) through a pipeline, the air outlet of the evaporator (17) is connected to the air inlet of the gas-liquid separator (14) through a pipeline, and the air outlet of the gas-liquid separator (14) is connected to the air intake of the compressor (1) through a pipeline; the second outlet of the three-way solenoid valve (2) is connected to the air inlet of the gas-liquid separator (14) through a pipeline. The air outlet is connected to the air inlet of the finned heat exchanger (7) through a pipeline, the liquid outlet of the finned heat exchanger (7) is connected to the liquid inlet of the liquid separator (8) through a pipeline, the liquid outlet of the liquid separator (8) is connected to the liquid inlet of the second one-way valve (10) through a pipeline, the liquid outlet of the second one-way valve (10) is connected to the liquid inlet of the second solenoid valve (15) through a pipeline, a first expansion valve (9) is arranged in parallel on one side of the second one-way valve (10), and two ends of the first expansion valve (9) are respectively connected to the liquid separator (8) and the second solenoid valve (15); one end of the finned heat exchanger (7) is connected to the air inlet of the first solenoid valve (6), and the air outlet of the first solenoid valve (6) is connected to the air inlet of the gas-liquid separator (14) through a pipeline.

2. The all-weather skid-mounted hot and cold water unit according to claim 1, characterized in that: A first one-way valve (4) is arranged on a pipeline connected to the liquid outlet of the condenser (3), and the first one-way valve (4) can allow the refrigerant liquid to flow out of the liquid outlet of the condenser (3) in one direction.

3. The all-weather skid-mounted hot and cold water unit according to claim 2, characterized in that: A second drying filter (12) is provided on a pipeline connected to the liquid outlet of the condenser (3).

4. The all-weather skid-mounted hot and cold water unit according to claim 3, characterized in that: A first drying filter (11) is provided on the pipeline connected to the first expansion valve (9).

5. The all-weather skid-mounted hot and cold water unit according to claim 4, characterized in that: High and low pressure lead-out points are taken on the exhaust pipe and the intake pipe of the compressor (1), and the high and low pressure lead-out points are connected to the high and low pressure controllers (13) through pipes.

6. The all-weather skid-mounted hot and cold water unit according to claim 5, characterized in that: The water outlet of the condenser (3) is connected to the circulating water inlet of the hot water tank (22) via a pipeline, the circulating water outlet of the hot water tank (22) is connected to the water inlet of the condenser (3) via a pipeline, a cooling water pump (23) is arranged on the pipeline between the water inlet of the condenser (3) and the circulating water outlet of the hot water tank (22), and the hot water outlet of the hot water tank (22) is connected to the heat supply pump (21).

7. The all-weather skid-mounted hot and cold water unit according to claim 6, characterized in that: The water outlet of the evaporator (17) is connected to the circulating water inlet of the cold water tank (19) through a pipeline, and the circulating water outlet of the cold water tank (19) is connected to the water inlet of the evaporator (17) through a pipeline. A chilled water pump (18) is arranged on the pipeline between the water inlet of the evaporator (17) and the circulating water outlet of the cold water tank (19), and the water outlet of the cold water tank (19) is connected to a cooling pump (20).

8. The all-weather skid-mounted hot and cold water unit according to claim 7, characterized in that: An exhaust fan (5) is provided on one side of the finned heat exchanger (7).

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