All-year water-cooling integrated cooling station structure

Abstract

The utility model discloses a year-round water cooling integrated cold station structure which comprises an evaporator, a condenser and a compressor, the compressor can drive refrigerants to circularly flow between the evaporator and the condenser, and the two sides of the condenser are communicated with a cooling tower through a first cooling water inlet pipe and a first cooling water outlet pipe. Cooling water can circularly flow from the cooling tower, the first cooling water outlet pipe, the condenser, the first cooling water inlet pipe and the cooling tower in sequence; a bypass pipe for communicating the first cooling water outlet pipe with the first water inlet pipe is arranged between the first cooling water outlet pipe and the first water inlet pipe; the bypass pipe is provided with an electric control valve; when the cooling inlet water temperature is lower than the preset value, the opening degree of the electric adjusting valve is adjusted, the cooling outlet water temperature is used for increasing the cooling inlet water temperature, then the condensation temperature is increased, the pressure of the high-pressure end of the compressor is increased, the pressure difference is formed between the high-pressure end and the low-pressure end, and therefore loading operation is achieved, energy losses are reduced, the refrigerating efficiency is improved, and energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the field of water-cooled integrated refrigeration stations, in particular to a year-round water-cooled integrated refrigeration station structure. Background Art

[0002] With the rapid economic development of my country in recent years, people's living standards have continued to improve, and people are increasingly pursuing a higher quality of life. The use of air conditioning has become increasingly common. Water-cooled integrated cooling stations are widely used in air-conditioned spaces such as hotels, restaurants, schools, theaters, shopping malls, office buildings, residential buildings, hospitals, and factories. They are also used for cooling processes in nuclear power plants, plastics chemicals, and precision instruments. Therefore, the reliability of water-cooled integrated cooling stations is extremely important and critical.

[0003] For example, the integrated cold station of Chinese patent CN202122443614.5 adopts a refrigeration system that uses water cooling or evaporative condensation, which has high efficiency; at the same time, a natural cooling heat exchanger is set to adjust the water circulation according to the temperature, and can make full use of the outdoor cold source to improve the energy efficiency ratio of the unit and achieve the effect of energy saving and emission reduction.

[0004] However, in actual operation, this type of integrated refrigeration station operates normally in summer. However, when the integrated refrigeration station is started in a low temperature environment, such as when the ambient temperature is close to 0°C or lower than the set temperature, icing will occur.

[0005] The existing startup method is generally as follows: first, the electric heating on the refrigeration side is turned on, and the cooling tower water level switch is detected at the same time. If the water level is normal and the water temperature is lower than the set temperature, the cooling tower electric heating is started to prevent the water tank from freezing. Then the refrigeration cooling water pump is started. The flow switch is used to detect that the water flow is normal and can meet the flow demand, and a start signal is given to the host.

[0006] During the startup process, in order to avoid the situation where the pressure on the high-pressure end of the system cannot rise after the compressor is started due to the system's condensing temperature being too low, and the high-pressure side and low-pressure side of the compressor cannot establish sufficient high-low pressure difference, resulting in the compressor being unable to load, insufficient oil supply to the compressor, and other serious damage to the compressor, the electric valve on the bypass pipe of the cooling water system will be opened at the same time, and the high outlet water temperature after heat exchange of the condenser will be used to supplement the cooling water inlet to neutralize the water temperature, thereby establishing a sufficient high pressure difference.

[0007] If forced oil supply is adopted, not only will the cost of the unit increase significantly, but the oil pump itself is also a moving part, and the reliability of the oil pump's shaft seal and motor will greatly affect the reliability of the unit. Using the oil pump to supply oil under pressure will leave a significant risk to the reliability of the unit.

[0008] Therefore, the existing technology has the following deficiencies:

[0009] a. Decreased refrigeration effect: The screw compressor pressure difference is one of the most important parameters in the refrigeration system. It reflects the pressure difference between the refrigerant in the evaporator and the condenser. If the pressure difference cannot be established, the circulation of the refrigerant between the evaporator and the condenser will be affected, resulting in a decrease in the refrigeration effect.

[0010] b. Increased energy consumption: If the screw compressor pressure difference cannot be established, the refrigeration system requires more energy to maintain the refrigeration effect, resulting in increased energy consumption;

[0011] c. Equipment damage: If the screw compressor pressure differential cannot be established, the pressure and temperature in the refrigeration system will become unstable, resulting in equipment damage. This startup method can be understood as the engine ignition failing to start. Continuous startup will cause loss or damage to the battery and engine.

[0012] d. Safety hazards: If the screw machine pressure differential cannot be established, the pressure and temperature in the refrigeration system will increase, resulting in safety hazards. Utility Model Content

[0013] The main purpose of this utility model is to propose a year-round water-cooled integrated cold station structure, which aims to improve refrigeration efficiency and reduce energy consumption. By reducing the pressure difference of the refrigerant between the evaporator and the condenser through bypass refrigeration, the energy loss is reduced, the refrigeration efficiency is improved, and the energy consumption is reduced.

[0014] To achieve the above-mentioned purpose, the present invention proposes a year-round water-cooled integrated cold station structure, comprising an evaporator, a condenser and a compressor, wherein the compressor can drive the refrigerant to circulate between the evaporator and the condenser;

[0015] Both sides of the condenser are connected to the cooling tower through the first cooling water inlet pipe and the first cooling water outlet pipe, and the cooling water can circulate through the cooling tower, the first cooling water outlet pipe, the condenser, the first cooling water inlet pipe and the cooling tower in sequence;

[0016] A bypass pipe is provided between the first cooling water outlet pipe and the first water inlet pipe to connect the two, and the bypass pipe is provided with an electric regulating valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model.

[0018] In the figure, 11 is an evaporator, 12 is a condenser, and 13 is a compressor;

[0019] 2 is a cooling tower, 21 is a first cooling water inlet pipe, 22 is a first cooling water outlet pipe, 23 is a bypass pipe, and 24 is an electric regulating valve;

[0020] 3 is a branch pipe, 31 is a bypass valve, and 32 is a cooling water pump;

[0021] 41 is the chilled water supply pipe, 42 is the chilled water return pipe, 43 is the pressure differential bypass valve, and 4 is the butterfly valve;

[0022] 5 is the chilled water pump and 6 is the fan. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0025] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, the descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] like Figure 1 As shown, a year-round water-cooled integrated cold station structure includes an evaporator 11, a condenser 12 and a compressor 13. The compressor 13 can drive the refrigerant to circulate between the evaporator 11 and the condenser 12;

[0027] Both sides of the condenser 12 are connected to the cooling tower 2 through the first cooling water inlet pipe 21 and the first cooling water outlet pipe 22, and the cooling water can circulate from the cooling tower 2, the first cooling water outlet pipe 22, the condenser 12, the first cooling water inlet pipe 21 and the cooling tower 2 in sequence;

[0028] A bypass pipe 23 is provided between the first cooling water outlet pipe 22 and the first water inlet pipe to connect the two. The bypass pipe 23 is provided with an electric regulating valve 24 .

[0029] In actual operation, when the cooling water inlet temperature is lower than the predetermined value, the opening of the electric regulating valve 24 is adjusted to increase the cooling water inlet temperature by using the cooling water outlet temperature, thereby increasing the condensing temperature and the pressure at the high-pressure end of the compressor 13, thereby forming a pressure difference with the low-pressure end and thus performing loaded operation;

[0030] That is, the provision of the bypass pipe 23 reduces the pressure difference of the refrigerant between the evaporator 11 and the condenser 12, thereby reducing energy loss, improving refrigeration efficiency, and reducing energy consumption.

[0031] Specifically, the evaporator 11 and the condenser 12 are respectively provided with a first electric heating rod and a second electric heating rod and a first freezing point switch and a second freezing point switch, wherein the first freezing point switch is used to control the opening or closing of the first electric heating rod, and the second freezing point switch is used to control the opening or closing and switching of the second electric heating rod.

[0032] When the outdoor temperature is too low, the condenser 12 will freeze due to overcooling, which will cause the condenser 12 to malfunction. When the outdoor temperature is lower than a certain temperature, the freezing point switch is used to control the switch of the corresponding electric heating rod, and the electric heating rod starts to start heating, so that the condenser 12 or evaporator 11 can operate normally.

[0033] More specifically, a connected chilled water supply pipe 41 and a chilled water return pipe 42 are respectively provided on both sides of the evaporator 11. The chilled water supply pipe 41 is located on the freezing side of the evaporator 11 and is provided with an electric heating device. The chilled water supply pipe 41 and the chilled water return pipe 42 are connected at one end away from the evaporator 11 through a chilled water pump 5.

[0034] When the inlet and outlet temperatures of the chilled water are lower than a predetermined value, the electric heating device is turned on to prevent the evaporator 11 from being damaged by freezing.

[0035] The electric heating emits a certain amount of heat through the heating medium, and supplements the heat loss of the pipeline through direct heat exchange with the chilled water supply pipe 41 to prevent the evaporator 11 from being damaged by freezing.

[0036] In the embodiment of the present utility model, the cooling tower 2 is provided with a third electric heating rod, a water level switch and a temperature sensor device.

[0037] The cooling tower 2 unit controls the start and stop of the third electric heating rod through the temperature sensor.

[0038] When the temperature is lower than a predetermined value, the third electric heating rod is turned on to heat the water tank of the cooling tower 2 to prevent the water tank of the cooling tower 2 from freezing.

[0039] The water level switch is used to detect the water level in the cooling tower 2 water tank to prevent the unit stability from being affected by untimely water replenishment due to pipe freezing in winter.

[0040] The cooling tower 2 unit determines whether the operating conditions are met through the detection data of the water level switch. When the water level is normal, the unit starts and runs; when the water level is lower than the safety line, the cooling tower 2 unit stops.

[0041] Specifically, the cooling tower 2 unit is provided with a fan 6, and the fan 6 is a bidirectional motor that can rotate counterclockwise or clockwise.

[0042] In an embodiment of the present utility model, the cooling water inlet pipe is provided with at least two groups of branch pipes 3, and the branch pipe 3 is provided with a bypass valve 31 and a cooling water pump 32 connected in series. Through the bypass valve 31, the variable frequency water pump and the control program, the main engine inlet water temperature reaches 20.2°C in 264.5 seconds, meeting the main engine water temperature requirement to establish a pressure difference, thereby more accurately controlling the cooling water temperature.

[0043] Furthermore, a pressure differential bypass valve 43 and a butterfly valve 4 are connected in parallel to the chilled water supply pipe 41 and the chilled water return pipe 42 at positions away from the condenser 12, thereby achieving chilled water regulation.

[0044] In the embodiment of the present utility model, the cooling water pump 32 is a variable frequency water pump.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the practical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A year-round water-cooled integrated cold station structure, comprising an evaporator, a condenser and a compressor, wherein the compressor can drive the refrigerant to circulate between the evaporator and the condenser; Features: The two sides of the condenser are connected to the cooling tower through the first cooling water inlet pipe and the first cooling water outlet pipe, and the cooling water can circulate through the cooling tower, the first cooling water outlet pipe, the condenser, the first cooling water inlet pipe and the cooling tower in sequence; A bypass pipe is provided between the first cooling water outlet pipe and the first water inlet pipe to connect the two, and the bypass pipe is provided with an electric regulating valve.

2. The year-round water-cooled integrated cold station structure according to claim 1, characterized in that: The evaporator and condenser are respectively provided with a first electric heating rod and a second electric heating rod and a first freezing point switch and a second freezing point switch, wherein the first freezing point switch is used to control the opening or closing of the first electric heating rod, and the second freezing point switch is used to control the opening or closing and switching of the second electric heating rod.

3. The year-round water-cooled integrated cold station structure according to claim 1, characterized in that: The two sides of the evaporator are respectively provided with a connected chilled water supply pipe and a chilled water return pipe. The chilled water supply pipe is located on the freezing side of the evaporator and is provided with an electric heating device. The ends of the chilled water supply pipe and the chilled water return pipe away from the evaporator are connected through a chilled water pump.

4. The year-round water-cooled integrated cold station structure according to claim 1, characterized in that: The cooling tower is provided with a third electric heating rod, a water level switch and a temperature sensor device; The cooling tower unit controls the start and stop of the third electric heating rod through the temperature sensor. When the temperature is lower than the preset value, the third electric heating rod is turned on to heat the cooling tower water tank to prevent the cooling tower water tank from freezing; The water level switch is used to detect the water level in the cooling tower tank.

5. The year-round water-cooled integrated cold station structure according to claim 1, characterized in that: The cooling tower unit is provided with a fan, and the fan is a bidirectional motor that can rotate counterclockwise or clockwise.

6. The year-round water-cooled integrated cold station structure according to claim 1, characterized in that: The cooling water inlet pipe is provided with at least two groups of branch pipes, and the branch pipes are provided with a bypass valve and a cooling water pump connected in series.

7. The year-round water-cooled integrated cold station structure according to claim 3, characterized in that: A pressure differential bypass valve and a butterfly valve are connected in parallel at positions of the chilled water supply pipe and the chilled water return pipe away from the condenser.

8. The year-round water-cooled integrated cold station structure according to claim 6, characterized in that: The cooling water pump is a variable frequency water pump.

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