CN212108839U - Evaporative condensing chiller based on mechanical refrigeration and fluorine pump natural cooling - Google Patents

Abstract

The utility model discloses an evaporative condensing chiller based on mechanical refrigeration and natural cooling by a fluorine pump, which comprises a unit casing, an air outlet is arranged above one side wall of the unit casing, and an evaporative condensation unit is arranged in the middle of the unit casing. The lower part of the side wall adjacent to the side wall with the air outlet on the casing is provided with air inlets on both sides of the evaporative condensing unit, and the side of the unit casing away from the air outlet is provided with a mechanical refrigeration unit. The condensing unit is connected by pipelines to form a closed circuit. The evaporative condensing chiller unit based on mechanical refrigeration and fluorine pump natural cooling of the utility model combines evaporative cooling, natural cooling and mechanical refrigeration, and solves the problems of high operation energy consumption of the existing mechanical refrigeration unit and unstable operation of the evaporative cooling unit. To achieve the complementary advantages of the two.

Description

Evaporative condensing chiller based on mechanical refrigeration and fluorine pump natural cooling

technical field

The utility model belongs to the technical field of air conditioning equipment, and relates to an evaporative condensation chiller unit based on mechanical refrigeration and natural cooling by a fluorine pump.

Background technique

With the rapid economic development, my country's energy is facing many challenges, energy conservation and emission reduction has become a basic national policy of our country.

Mechanical refrigeration technology can produce relatively stable cooling capacity, but it consumes a lot of energy. Therefore, mechanical refrigeration and air conditioning methods are facing transformation and upgrading. Evaporative cooling air conditioning technology has the unique advantages of energy saving, low carbon, economy and health. Computer rooms and shopping malls need cooling all year round. When the outdoor temperature is lower than the indoor temperature in winter and transitional seasons, there are abundant cold sources in nature. However, due to the regional and seasonal nature of evaporative cooling and natural cooling, the cooling capacity and supply air temperature are greatly affected by external environmental factors.

Utility model content

The purpose of this utility model is to provide an evaporative condensing chiller based on mechanical refrigeration and fluorine pump natural cooling, which combines evaporative cooling, natural cooling and mechanical refrigeration, and solves the problem that the existing mechanical refrigeration units have high operating energy consumption, and the evaporative cooling units operate The problem of instability, to achieve the complementary advantages of the two.

The technical scheme adopted by the utility model is that an evaporative condensing chiller based on mechanical refrigeration and natural cooling by a fluorine pump comprises a unit casing, an air outlet is arranged above one side wall of the unit casing, and an evaporative condensation unit is arranged in the middle of the unit casing Unit, the lower part of the side wall adjacent to the side wall where the air outlet is set on the unit casing is provided with air inlets on both sides of the corresponding evaporative condensation unit, and the side of the unit casing away from the air outlet is provided with a mechanical refrigeration unit. The unit and the evaporative condensation unit are connected to form a closed circuit by pipelines.

The utility model is also characterized in that,

The evaporative condensing unit includes a filler b located between two air inlets. Above the filler b are sequentially arranged a condensing coil, a water distribution device, a water baffle and an air outlet from bottom to top, and between adjacent coils in the middle of the condensing coil. There is also a filler a, a water storage tank is arranged under the filler b, the water distribution device and the water storage tank are connected by a water supply pipe, the water distribution device distributes water downward, and the condensing coil and the mechanical refrigeration unit are connected by a closed circuit formed by a pipeline. .

A coarse-efficiency filter is also arranged between the air inlet and the filler b on the side near the air inlet, and a uniform air plate is also arranged on the side near the filler b.

A circulating water pump and a regulating valve are also arranged on the water supply pipe, and a floating ball valve is arranged in the water storage tank.

Both filler b and filler a are double-layer fillers, and filler b is "V" type.

A centrifugal fan is also provided at the air outlet.

A fan support is arranged in the casing of the unit, and the centrifugal fan is arranged on the fan support.

The mechanical refrigeration unit includes a plate evaporator arranged in the lower part of the unit casing away from the air outlet. The plate evaporator is sequentially connected with a compressor, a condenser coil, a liquid accumulator, a fluorine pump, an expansion valve and a solenoid valve through pipelines. form a closed loop.

The compressor, condensing coil, liquid accumulator, fluorine pump, expansion valve and solenoid valve are all arranged above the plate evaporator.

A bypass valve a is arranged in parallel on the compressor, and a bypass valve b is arranged in parallel on the fluorine pump.

The unit casing is also provided with a PLC electric control box. The PLC electric control box is electrically connected to the compressor, the bypass valve a, the bypass valve b, and the fluorine pump through cables. The PLC electric control box is also electrically connected with a temperature sensor. The temperature sensor is arranged outside the casing of the unit.

The beneficial effect of the utility model is

(1) The evaporative condensing chiller of the present utility model has diversified operation modes, adopts various cooling modes such as mechanical refrigeration, fluorine pump natural cooling, evaporative cooling, etc., and switches the operation mode according to the meteorological conditions and the temperature and humidity requirements in the building to improve the cold water. The heat exchange efficiency of the unit, energy saving and environmental protection.

(2) The evaporative condensing chiller of the present invention adopts a fluorine pump for natural cooling. In summer, when the outdoor temperature is lower than the temperature set by the controller, the controller automatically switches from the compressor refrigeration to the fluorine pump refrigeration. The freon liquid cooled by the condenser is transported to the evaporator through the fluorine pump. After absorbing the heat in the room, the freon changes from liquid to gaseous state, enters the evaporative condenser, and cools into liquid again, and the cycle begins again and again. In winter or transitional seasons, use the sufficient outdoor cooling capacity to run the fluorine pump cooling mode. Since the power of the fluorine pump is much smaller than that of the refrigeration compressor, under the premise of the same cooling capacity, the energy efficiency ratio of the fluorine pump is much higher than that of the refrigeration compressor, thus achieving the effect of cooling and energy saving.

(3) In the evaporative condensing chiller of the present invention, the packing adopts double-layer packing, and the packing is arranged in two layers. The upper layer is a square material, and the lower layer is a "V"-shaped packing. The addition of the square packing on the upper layer reduces the circulation. Water temperature, so that the contact time between the heat exchanger and the circulating water is long, and the heat exchange area is increased; the bottom filler is placed in the lower part of the condensing coil, and the air at the air inlet is preferentially cooled by the evaporative cooling process in the filler and the water spray, and then blowing again. To the coil, the heat exchange efficiency is improved, and the inclined surface design of the bottom filler effectively adjusts the problem of uneven resistance when the airflow on both sides is in contact with the filler.

(4) The evaporative condensing chiller of the present utility model adopts symmetrical double air inlets, and a wind shield is arranged behind the air inlet. The fresh air entering the unit from the tuyere leaves the unit from the air inlet on the other side, or the wind pressure at the air inlet on the other side is too high to prevent the outside fresh air from entering the unit.

(5) In the evaporative condensing chiller of the present invention, the evaporative condensing section and the exhaust air of the unit share a centrifugal fan, which reduces the number of fans arranged in the unit, and reduces the initial investment and the size of the floor space.

Description of drawings

Fig. 1 is the structural representation of the evaporative condensation chiller of the present utility model;

Fig. 2 is the structural representation of the mechanical refrigeration unit in the evaporative condensation chiller of the present invention;

Fig. 3 is the circuit connection diagram of the evaporative condensing chiller of the present invention.

In the figure, 1. Air inlet, 2. Coarse filter, 3. Air distribution plate, 4. Water storage tank, 5. Packing b, 6. Circulating water pump, 7. Float valve, 8. Condensing coil, 9. Packing a, 10. Water supply pipe, 11. Plate evaporator, 12. PLC electric control box, 13. Compressor, 14. Bypass valve a, 15. Liquid reservoir, 16. Solenoid valve, 17. Thermal expansion valve, 18. Fluorine pump, 19. Bypass valve b, 20. Water baffle, 21. Air outlet, 22. Water distribution device, 23. Centrifugal fan, 24. Air outlet, 25. Fan bracket, 26. Unit shell Body, 27. Regulating valve, 28, Temperature sensor.

Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

The evaporative condensing chiller of the present invention is based on mechanical refrigeration and natural cooling by fluorine pump. An evaporative condensing unit is arranged in the middle of the inner part, and the lower part of the side wall adjacent to the side wall where the air outlet 24 is arranged on the unit casing 26 is provided with air inlets 1 on both sides corresponding to the evaporative condensing unit, and the unit casing 26 is far away from the air outlet. One side of 24 is provided with a mechanical refrigeration unit, and the mechanical refrigeration unit and the evaporative condensation unit are connected to form a closed loop through pipelines.

The evaporative condensation unit includes a filler b5 located between the two air inlets 1. Above the filler b5, a condensation coil 8, a water distribution device 22, a water baffle 20 and an air outlet 21 are sequentially arranged from bottom to top. A filler a9 is also arranged between the adjacent coils, a water storage tank 4 is arranged below the filler b5, the water distribution device 22 and the water storage tank 4 are connected by the water supply pipe 10, the water distribution device 22 distributes water downward, and the condensing coil 8 A closed circuit is formed by connecting with a mechanical refrigeration unit through a pipeline.

A coarse filter 2 is also provided between the air inlet 1 and the filler b5 on the side close to the air inlet 1, and an air distribution plate 3 is also provided on the side close to the filler b5.

The water supply pipe 10 is also provided with a circulating water pump 6 and a regulating valve 27 , and a floating ball valve 7 is provided in the water storage tank 4 .

Both the filler b5 and the filler a9 are double-layer fillers, and the filler b5 is of "V" type.

A centrifugal fan 23 is also provided at the air outlet 24 .

A fan support 25 is arranged in the unit casing 26 , and the centrifugal fan 23 is arranged on the fan support 25 .

As shown in FIG. 2 , the mechanical refrigeration unit includes a plate evaporator 11 arranged in the lower part of the unit casing 26 on the side away from the air outlet 24 . The plate evaporator 11 is sequentially connected with a compressor 13 , a condensing coil 8 , The accumulator 15, the fluorine pump 18, the expansion valve 17 and the solenoid valve 16 form a closed circuit.

The compressor 13 , the condensing coil 8 , the liquid accumulator 15 , the fluorine pump 18 , the expansion valve 17 and the solenoid valve 16 are all arranged above the plate evaporator 11 .

The compressor 13 is provided with a bypass valve a14 in parallel, and the fluorine pump 18 is provided with a bypass valve b19 in parallel.

As shown in FIG. 3 , the unit casing 26 is also provided with a PLC electric control box 12. The PLC electric control box 12 is electrically connected to the compressor 13, the bypass valve a14, the bypass valve b19, and the fluorine pump 18 through cables. The PLC electric control box 12 is also electrically connected with a temperature sensor 28, and the temperature sensor 28 is arranged outside the unit casing.

The water baffle 20 of the present invention is a corrugated water baffle; the condensing coil 8 adopts a corrugated pipe, and the corrugated pipe type increases the heat exchange area, and the corrugation disturbs the flow state and increases its convective heat transfer coefficient to enhance heat transfer. The effect of the uniform air distribution plate 3 is evenly opened with strip-shaped holes.

The working principle of the evaporative condensation chiller unit based on the mechanical refrigeration and the natural cooling of the fluorine pump of the utility model is as follows:

It is set according to different regions and different purposes, and the control temperature of the controller in the PLC electric control box 12 is set.

(1) When the outdoor temperature is high, run the mechanical cooling mode:

When the temperature detected by the outdoor temperature sensor 28 is higher than the temperature set by the controller in the PLC electric control box 12, the compressor cooling mode is operated. At this time, under the control of the PLC electric control box 12, the compressor 13 is turned on, the bypass valve b19 is closed, and the bypass valve b19 is closed. Through valve a14, fluorine pump 18, the outdoor fresh air enters the unit casing 26 from the air inlet 1, and is filtered by the coarse filter 2, and is exchanged with water in the fillers a9 and b5 for enthalpy cooling, and the condensing coil 8. The water film covered on the surface performs heat and moisture exchange, taking away the heat of the high-temperature gaseous refrigerant in the tube, and the cooled liquid refrigerant is depressurized in the thermal expansion valve 17 and sent to the plate evaporator 11 to absorb the heat in the room.

(2) When the outdoor temperature is lower than the set temperature of the controller, run the fluorine pump cooling mode:

When the temperature detected by the outdoor temperature sensor 28 is lower than the temperature set by the controller in the PLC electric control box 12, it switches to the fluorine pump for refrigeration. At this time, under the control of the PLC electric control box 12, the bypass valve a14 and the fluorine pump 18 are opened, and the compression is closed. 13. By-pass valve b19, the outdoor fresh air enters the unit through the air inlet 1, is filtered by the coarse filter 2, conducts heat and moisture exchange with water in the fillers a9, b5 and is enthalpy to cool down, and the water covered on the surface of the condensing coil 8 The membrane conducts heat and moisture exchange to take away the heat of the high-temperature gaseous refrigerant in the tube. The cooled refrigerant liquid is stored in the liquid accumulator 15 and transported to the plate evaporator 11 through the fluorine pump 18. After absorbing the heat in the room, the refrigerant is The liquid is transformed into a gaseous state, enters the evaporative condensation unit, and is cooled into a liquid again, and the cycle begins again and again.

(3) Winter operating mode:

Running the fluorine pump in natural cooling mode, in order to prevent the unit from freezing and cracking, the water distribution device 22 stops working, and makes full use of the outdoor cold air to cool the high-temperature Freon in the cooling condensing coil 8, and the cooled Freon liquid is stored in the accumulator 15, through the fluorine pump 18 It is sent to the plate evaporator 11 to absorb the heat in the room.

Claims (10)

1. Evaporative condensation cooling water set based on mechanical refrigeration and fluorine pump natural cooling, a serial communication port, including unit housing (26), unit housing (26) a lateral wall top is provided with air exit (24), the middle part is provided with evaporative condensation unit in unit housing (26), correspond with the lateral wall lower part that sets up air exit (24) lateral wall on unit housing (26) evaporative condensation unit's both sides all are provided with air intake (1), one side of keeping away from air exit (24) in unit housing (26) is provided with mechanical refrigeration unit, mechanical refrigeration unit and evaporative condensation unit pass through the closed return circuit of tube coupling formation.

2. The evaporative condensation water chilling unit according to claim 1, wherein the evaporative condensation unit comprises a filler b (5) located between two air inlets (1), a condensation coil (8), a water distribution device (22), a water baffle (20) and an air outlet (21) are sequentially arranged above the filler b (5) from bottom to top, a filler a (9) is further arranged between adjacent coils in the middle of the condensation coil (8), a water storage tank (4) is arranged below the filler b (5), the water distribution device (22) is connected with the water storage tank (4) through a water supply pipe (10), the water distribution device (22) distributes water downwards, and the condensation coil (8) and the mechanical refrigeration unit are connected through a pipeline to form a closed loop.

3. The evaporative condensation water chilling unit according to claim 2, wherein a coarse filter (2) is further disposed between the air inlet (1) and the filler b (5) on the side close to the air inlet (1), and an air distribution plate (3) is further disposed on the side close to the filler b (5).

4. An evaporative condensation water chilling unit according to claim 3, characterized in that a circulating water pump (6) and a regulating valve (27) are provided on the water supply pipe (10), and a float valve (7) is provided in the water storage tank (4).

5. The evaporative condensation chiller according to any of claims 2-4, wherein a centrifugal fan (23) is further disposed at the air outlet (24).

6. The evaporative condensation water chilling unit according to claim 5, wherein the filler b (5) and the filler a (9) both adopt double-layer fillers, and the filler b (5) is V-shaped.

7. An evaporative condensation chiller according to claim 6, characterised in that a fan mount (25) is provided within the chiller housing (26), the centrifugal fan (23) being provided on the fan mount (25).

8. An evaporative condensation chiller according to claim 5, wherein the mechanical refrigeration unit comprises a plate evaporator (11) arranged at the lower part of the side far away from the air outlet (24) in the chiller housing (26), and the plate evaporator (11) is connected with a compressor (13), a condensing coil (8), a liquid reservoir (15), a fluorine pump (18), an expansion valve (17) and a solenoid valve (16) in sequence through pipelines and forms a closed loop.

9. An evaporative condensation chiller according to claim 8, wherein the compressor (13), the condenser coil (8), the reservoir (15), the fluorine pump (18), the expansion valve (17) and the solenoid valve (16) are all disposed above the plate evaporator (11), the bypass valve a (14) is disposed in parallel on the compressor (13), and the bypass valve b (19) is disposed in parallel on the fluorine pump (18).

10. The evaporative condensation water chilling unit according to claim 9, wherein a PLC (programmable logic controller) electric cabinet (12) is further arranged in the unit housing (26), the PLC electric cabinet (12) is electrically connected with the compressor (13), the bypass valve a (14), the bypass valve b (19) and the fluorine pump (18) through cables, the PLC electric cabinet (12) is further electrically connected with a temperature sensor (28), and the temperature sensor (28) is arranged outside the unit housing.

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