Air conditioning system

Abstract

The utility model relates to the technical field of refrigeration equipment, and discloses an air conditioning system, which comprises a first refrigerating unit, a second refrigerating unit and a third refrigerating unit, the second refrigerating unit is communicated with the second cold water conveying part; the refrigerating temperature controller is electrically connected with the first refrigerating unit and the second refrigerating unit; the auxiliary cold water conveying part and the first cold water conveying part are arranged in parallel; the first cold water temperature controller is arranged on the cold water outlet side of the first refrigerating unit and electrically connected with the first cold water conveying part and the auxiliary cold water conveying part; the second cold water temperature controller is arranged on the cold water outlet side of the second refrigerating unit and electrically connected with the second cold water conveying part; a refrigeration terminal; according to the air conditioning system, the arrangement mode that one pump supplies one unit is adopted, the parallel arrangement relation between cold water conveying parts is omitted, the refrigerating system is provided with two parallel lines, the refrigerating temperature controller can start and stop the first refrigerating unit or the second refrigerating unit according to the actual temperature, the single-line refrigerating mode or the double-line simultaneous refrigerating mode is switched, and manpower and electric power are saved.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, specifically to an air conditioning system. Background Technology

[0002] A workshop air conditioning system refers to an air conditioning system used in workshops or industrial sites. A workshop air conditioning system mainly includes a fan system, a chilled water system, and a circulating water system.

[0003] In related technologies, workshop air conditioning systems suffer from drawbacks such as cumbersome operation procedures, high manual workload, and inability to reasonably set the start and stop of various electrical equipment, resulting in significant energy waste. Specifically, in chilled water or circulating water systems, multiple water pumps and multiple refrigeration units are connected in parallel. To meet cooling requirements, workers often run all refrigeration units at once. When a refrigeration unit triggers a temperature alarm, more water pumps are turned on, resulting in extremely high power consumption of the air conditioning system in actual workshop production, which is also time-consuming and labor-intensive. Utility Model Content

[0004] In view of this, the present invention provides an air conditioning system to solve the problems of cumbersome operation procedures, large amount of manual labor, and inability to reasonably set the start and stop of various electrical equipment in workshop air conditioning systems, resulting in a great waste of electricity.

[0005] This utility model provides an air conditioning system, comprising: a first refrigeration unit connected to a first chilled water delivery unit; a second refrigeration unit connected to a second chilled water delivery unit; a refrigeration thermostat located inside the workshop and electrically connected to the first and second refrigeration units, adapted to control the start and stop of the first and second refrigeration units respectively; a secondary chilled water delivery unit connected in parallel with the first chilled water delivery unit; a first chilled water thermostat located on the chilled water outlet side of the first refrigeration unit and electrically connected to the first and secondary chilled water delivery units; a second chilled water thermostat located on the chilled water outlet side of the second refrigeration unit and electrically connected to the second chilled water delivery unit; and a refrigeration terminal, with its outlet side connected to the first and second refrigeration units and its inlet side connected to the first and second chilled water delivery units.

[0006] In one optional embodiment, the system further includes: a first cooling tower connected to the first refrigeration unit, wherein a first flow switch is provided on the water inlet side of the first cooling tower; a second cooling tower connected to the second refrigeration unit, wherein a second flow switch is provided on the water inlet side of the second cooling tower; a first fan is provided inside the first cooling tower, and the first fan is electrically connected to the first flow switch; a second fan is provided inside the second cooling tower, and the second fan is electrically connected to the second flow switch; and a cooling temperature controller is located outside the workshop and is electrically connected to both the first fan and the second fan.

[0007] In one optional embodiment, it further includes: a first circulation conveying unit connected to the first refrigeration unit; a second circulation conveying unit connected to the second refrigeration unit; a secondary circulation conveying unit connected in parallel with the first circulation conveying unit; a first circulation temperature controller located on the circulating water outlet side of the first refrigeration unit and electrically connected to the first circulation conveying unit and the secondary circulation conveying unit; and a second circulation temperature controller located on the circulating water outlet side of the second refrigeration unit and electrically connected to the second circulation conveying unit.

[0008] In one alternative implementation, a fan unit is connected to the refrigeration terminal.

[0009] In one optional embodiment, the first cold water delivery unit includes a first cold water pump and a first frequency converter, the first cold water pump being connected to a first refrigeration unit, and the first frequency converter being adapted to adjust the pump speed of the first cold water pump; the second cold water delivery unit includes a second cold water pump and a second frequency converter, the second cold water pump being connected to a second refrigeration unit, and the second frequency converter being adapted to adjust the pump speed of the second cold water pump.

[0010] In one optional embodiment, the first circulating conveying unit includes a first circulating pump and a third frequency converter, the first circulating pump being connected to a first refrigeration unit, and the third frequency converter being adapted to adjust the pumping speed of the first circulating pump; the second circulating conveying unit includes a second circulating pump and a fourth frequency converter, the second circulating pump being connected to a second refrigeration unit, and the fourth frequency converter being adapted to adjust the pumping speed of the second circulating pump.

[0011] In one alternative implementation, the auxiliary cold water delivery unit is a first pump body.

[0012] In one alternative embodiment, the secondary circulation conveying unit is a second pump body.

[0013] Beneficial effects: By adopting a "one pump supplies one unit" setup, the parallel connection between chilled water delivery units is eliminated, and the refrigeration system is configured as a dual-line parallel system. The refrigeration temperature controller installed inside the workshop can start or stop the first or second refrigeration unit according to the actual temperature, switching between single-line refrigeration and simultaneous dual-line refrigeration, thus saving manpower and energy resources. The first refrigeration unit works in conjunction with the first chilled water delivery unit to supply chilled water to the refrigeration terminals. The first chilled water temperature controller can detect the actual outlet water temperature on the chilled water side of the first refrigeration unit and adjust the delivery speed of the first chilled water delivery unit and the start / stop of the auxiliary chilled water delivery unit according to the temperature. The auxiliary chilled water delivery unit serves as a backup delivery unit for the first refrigeration unit. While ensuring the refrigeration effect, this system simplifies operation steps, reduces manual workload, and rationally sets the start / stop of various electrical equipment, greatly saving energy. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the air conditioning system of this utility model.

[0016] Explanation of reference numerals in the attached figures:

[0017] 1. First refrigeration unit; 11. First chilled water delivery unit; 12. First chilled water temperature controller;

[0018] 2. Second refrigeration unit; 21. Second chilled water delivery unit; 22. Second chilled water temperature controller;

[0019] 3. Secondary cooling water conveying unit;

[0020] 4. Refrigeration terminal;

[0021] 5. First cooling tower; 51. First water flow switch; 52. First fan;

[0022] 6. Second cooling tower; 61. Second water flow switch; 62. Second fan;

[0023] 7. First circulation conveying unit; 71. First circulation temperature controller;

[0024] 8. Second circulation conveying unit; 81. Second circulation temperature controller;

[0025] 9. Secondary circulation conveyor unit;

[0026] 10. Fan equipment. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0031] The following is combined with Figure 1 The following describes embodiments of the present invention.

[0032] According to an embodiment of this utility model, an air conditioning system is provided, comprising: a first refrigeration unit 1, connected to a first chilled water delivery unit 11; a second refrigeration unit 2, connected to a second chilled water delivery unit 21; a refrigeration thermostat, located inside the workshop, electrically connected to the first refrigeration unit 1 and the second refrigeration unit 2, adapted to control the start and stop of the first refrigeration unit 1 and the second refrigeration unit 2 respectively; an auxiliary chilled water delivery unit 3, arranged in parallel with the first chilled water delivery unit 11; a first chilled water thermostat 12, located on the chilled water outlet side of the first refrigeration unit 1, electrically connected to the first chilled water delivery unit 11; a second chilled water thermostat 22, located on the chilled water outlet side of the second refrigeration unit 2, electrically connected to the second chilled water delivery unit 21; and a refrigeration terminal 4, with its outlet side connected to the first refrigeration unit 1 and the second refrigeration unit 2, and its inlet side connected to the first chilled water delivery unit 11 and the second chilled water delivery unit 21.

[0033] Specifically, the configuration of refrigeration units is not limited to the first refrigeration unit 1 and the second refrigeration unit 2; at least two independent refrigeration units are required.

[0034] In this embodiment, a "one pump supplies one unit" configuration is adopted, eliminating the parallel connection between the chilled water delivery units and setting the refrigeration system in a dual-line parallel manner. The refrigeration temperature controller installed inside the workshop can start and stop the first refrigeration unit 1 or the second refrigeration unit 2 according to the actual temperature, switching between single-line refrigeration or dual-line simultaneous refrigeration, which saves manpower and power resources. The first refrigeration unit 1 works with the first chilled water delivery unit 11 to supply chilled water to the refrigeration terminal 4. The first chilled water temperature controller 12 can detect the actual outlet water temperature on the chilled water side of the first refrigeration unit 1 and adjust the delivery speed of the first chilled water delivery unit 11 and the start and stop of the auxiliary chilled water delivery unit 3 according to the temperature. The auxiliary chilled water delivery unit 3 serves as a backup delivery unit for the first refrigeration unit 1. While ensuring the refrigeration effect, it simplifies the operation steps, reduces the amount of manual labor, and rationally sets the start and stop of each electrical device, greatly saving energy.

[0035] Specifically, the first cold water delivery unit 11 includes a first cold water pump and a first frequency converter. The first frequency converter is installed at the first cold water pump, and the first cold water pump is connected to the first refrigeration unit 1. The first frequency converter is adapted to adjust the pump speed of the first cold water pump. The second cold water delivery unit 21 includes a second cold water pump and a second frequency converter. The second frequency converter is installed at the second cold water pump, and the second cold water pump is connected to the second refrigeration unit 2. The second frequency converter is adapted to adjust the pump speed of the second cold water pump.

[0036] Specifically, the auxiliary cold water delivery unit 3 is the first pump body.

[0037] The specific usage process is as follows: the refrigeration temperature controller can be set in the more important and higher temperature filling area of ​​the workshop. The refrigeration temperature controller can sense the temperature during workshop production and compare it with the pre-set temperature value. The value of the set temperature can be determined according to the actual production needs of the workshop, and control the start and stop of the refrigeration unit.

[0038] Specifically, when the temperature inside the workshop is high, the refrigeration thermostat first turns on the first refrigeration unit 1. If the temperature inside the workshop still does not meet the requirements after a period of time, the second refrigeration unit 2 is turned on to supplement the cooling. After the temperature inside the workshop reaches the set temperature for a period of time, the second refrigeration unit 2 is turned off, leaving only the first refrigeration unit 1 to operate normally for cooling.

[0039] Furthermore, the first chilled water pump supplies water to the first refrigeration unit 1, and the second chilled water pump supplies water to the second refrigeration unit 2. The first pump body is a standby pump for the unit. Inverters are installed at the first and second chilled water pumps respectively, and the inverters can adjust the pumping speed of the pumps. The first chilled water temperature controller 12 and the second chilled water temperature controller 22 can detect the supply water temperature on the chilled water side of the refrigeration unit and compare it with the set temperature value, and control the start / stop or pumping speed of the corresponding pump body respectively.

[0040] Specifically, if the chilled water outlet temperature of the first chiller unit 1 is higher than the set temperature, the first chilled water temperature controller 12 increases the pump speed of the first chilled water pump through the first frequency converter to increase the water pressure and reduce the outlet water temperature; if the first chilled water pump reaches full speed but the outlet water temperature still does not reach the set temperature, the first chilled water temperature controller 12 controls the first pump body to start and participate in pumping to further increase the water pressure and further reduce the outlet water temperature; similarly, if the second chiller unit 2 starts and its chilled water outlet temperature rises, the second chilled water temperature controller 22 also increases the pump speed of the second chilled water pump to reduce the outlet water temperature; if the chilled water reaches the set temperature, the relevant water pumps operate at the minimum pump speed.

[0041] During actual production, the air conditioning system provided in this embodiment consumes an average of 2,200 to 3,000 kilowatt-hours of electricity per day, while before the modification, the average daily electricity consumption was 6,000 to 10,000 kilowatt-hours, which means that 4,000 to 6,000 kilowatt-hours of electricity can be saved every day, greatly reducing the cost of electricity.

[0042] In some embodiments, the system further includes: a first cooling tower 5 connected to the first refrigeration unit 1, wherein a first flow switch 51 is provided on the water inlet side of the first cooling tower 5; a second cooling tower 6 connected to the second refrigeration unit 2, wherein a second flow switch 61 is provided on the water inlet side of the second cooling tower 6; a first fan 52 is provided inside the first cooling tower 5, and the first fan 52 is electrically connected to the first flow switch 51; a second fan 62 is provided inside the second cooling tower 6, and the second fan 62 is electrically connected to the second flow switch 61; and a cooling temperature controller is located outside the workshop and is electrically connected to the first fan 52 and the second fan 62 respectively.

[0043] Specifically, the cooling temperature controller is used to detect the temperature under the outdoor sunlight outside the workshop, and the first water flow switch 51 and the second water flow switch 61 are used to detect whether water is flowing through the corresponding pipe. When the temperature under the outdoor sunlight reaches the set temperature or above, and the first water flow switch 51 or the second water flow switch 61 detects that water is flowing through the corresponding pipe, the first fan 52 or the second fan 62 is turned on to improve the cooling effect.

[0044] Optionally, the set temperature in the cooling temperature controller can be selected according to the actual production needs of the workshop, and can be 32 degrees.

[0045] In some embodiments, the system further includes a fan device 10 connected to the refrigeration terminal 4, wherein the fan device 10 is used to introduce fresh outdoor air into the air conditioning system and exhaust air from the workshop to the outside.

[0046] In some embodiments, the system further includes: a first circulation conveying unit 7 connected to the first refrigeration unit 1; a second circulation conveying unit 8 connected to the second refrigeration unit 2; a secondary circulation conveying unit 9 connected in parallel with the first circulation conveying unit 7; a first circulation temperature controller 71 located on the circulating water outlet side of the first refrigeration unit 1 and electrically connected to the first circulation conveying unit 7 and the secondary circulation conveying unit 9; and a second circulation temperature controller 81 located on the circulating water outlet side of the second refrigeration unit 2 and electrically connected to the second circulation conveying unit 8.

[0047] In the circulating water system, the "one pump supplies one unit" configuration is also adopted. The circulating water is cooled by the cooling tower and supplied to the first refrigeration unit 1 and the second refrigeration unit 2 respectively through the first circulating conveying unit 7 or the second circulating conveying unit 8. This is used to cool the high-temperature refrigerant such as high-temperature fluorine in the refrigeration unit and to cool the lubricating oil of the unit, so as to ensure the normal operation of the refrigeration unit.

[0048] Specifically, the first circulating conveying unit 7 includes a first circulating pump and a third frequency converter. The first circulating pump is connected to the first refrigeration unit 1, and the third frequency converter is installed at the first circulating pump. The third frequency converter is adapted to adjust the pumping speed of the first circulating pump. The second circulating conveying unit 8 includes a second circulating pump and a fourth frequency converter. The second circulating pump is connected to the second refrigeration unit 2, and the second circulating pump is installed at the second circulating pump. The fourth frequency converter is adapted to adjust the pumping speed of the second circulating pump.

[0049] In one alternative embodiment, the secondary circulation conveying unit 9 is a second pump body.

[0050] Specifically, the first circulating pump supplies water to the first refrigeration unit 1, the second circulating pump supplies water to the second refrigeration unit 2, and the second pump body is the standby pump for the unit; frequency converters are installed at the first and second circulating pumps respectively, and the frequency converters can adjust the pumping speed of the water pumps; the first circulating temperature controller 71 and the second circulating temperature controller 81 can detect the temperature of the circulating water outlet side of the refrigeration unit and compare it with the set temperature value, and control the start / stop or pumping speed of the corresponding pump body respectively.

[0051] If the outlet water temperature of the circulating water in the first chiller unit 1 is higher than the set temperature, the first circulating temperature controller 71 increases the pump speed of the first circulating pump through the third frequency converter to increase the water pressure and lower the outlet water temperature. If the first circulating pump reaches full speed but the outlet water temperature still does not reach the set temperature, the first circulating temperature controller 71 controls the second pump to start and participate in pumping to further increase the water pressure and further lower the outlet water temperature. Similarly, if the second chiller unit 2 starts and its circulating outlet water temperature rises, the second circulating temperature controller 81 also increases the pump speed of the second circulating pump to lower the outlet water temperature. If the circulating water reaches the set temperature, the temperature controller makes the relevant water pumps run at the lowest pump speed.

[0052] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope defined by the present invention.

Claims

1. An air conditioning system, characterized by, The application relates to a refrigeration system for a workshop, which comprises the following parts: a first refrigeration unit (1) connected with a first cold water conveying part (11); a second refrigeration unit (2) connected with a second cold water conveying part (21); a refrigeration temperature controller arranged in the workshop and electrically connected with the first refrigeration unit (1) and the second refrigeration unit (2) and adapted to control the start and stop of the first refrigeration unit (1) and the second refrigeration unit (2) respectively; a secondary cold water conveying part (3) arranged in parallel with the first cold water conveying part (11); a first cold water temperature controller (12) arranged at the cold water outlet side of the first refrigeration unit (1) and electrically connected with the first cold water conveying part (11) and the secondary cold water conveying part (3); a second cold water temperature controller (22) arranged at the cold water outlet side of the second refrigeration unit (2) and electrically connected with the second cold water conveying part (21); a refrigeration terminal (4) with the water outlet side connected with the first refrigeration unit (1) and the second refrigeration unit (2) and the water inlet side connected with the first cold water conveying part (11) and the second cold water conveying part (21).

2. The air conditioning system of claim 1, wherein, The application further comprises a first cooling tower (5) connected with the first refrigeration unit (1), wherein the water inlet side of the first cooling tower (5) is provided with a first water flow switch (51); a second cooling tower (6) connected with the second refrigeration unit (2), wherein the water inlet side of the second cooling tower (6) is provided with a second water flow switch (61); the first cooling tower (5) is provided with a first fan (52) electrically connected with the first water flow switch (51); the second cooling tower (6) is provided with a second fan (62) electrically connected with the second water flow switch (61); a cooling temperature controller arranged outside the workshop and electrically connected with the first fan (52) and the second fan (62) respectively.

3. The air conditioning system of claim 1, wherein, The application further comprises a first circulating conveying part (7) connected with the first refrigeration unit (1); a second circulating conveying part (8) connected with the second refrigeration unit (2); a secondary circulating conveying part (9) arranged in parallel with the first circulating conveying part (7); a first circulating temperature controller (71) arranged at the circulating water outlet side of the first refrigeration unit (1) and electrically connected with the first circulating conveying part (7) and the secondary circulating conveying part (9); a second circulating temperature controller (81) arranged at the circulating water outlet side of the second refrigeration unit (2) and electrically connected with the second circulating conveying part (8).

4. The air conditioning system of claim 1, wherein, The application further comprises a fan device (10) connected with the refrigeration terminal (4).

5. The air conditioning system of claim 1, wherein, The first cold water conveying part (11) comprises a first cold water pump and a first frequency converter, the first cold water pump is connected with the first refrigeration unit (1), and the first frequency converter is adapted to adjust the pump speed of the first cold water pump; the second cold water conveying part (21) comprises a second cold water pump and a second frequency converter, the second cold water pump is connected with the second refrigeration unit (2), and the second frequency converter is adapted to adjust the pump speed of the second cold water pump.

6. The air conditioning system of claim 3, wherein the first circulating conveying part (7) comprises a first circulating pump and a third frequency converter, the first circulating pump is connected with the first refrigeration unit (1), and the third frequency converter is adapted to adjust the pump speed of the first circulating pump. The second circulating conveying part (8) comprises a second circulating pump and a fourth frequency converter, the second circulating pump is communicated with the second refrigerating unit (2), and the fourth frequency converter is adapted to adjust the pump speed of the second circulating pump.

7. The air conditioning system of claim 1, wherein, The auxiliary cold water conveying part (3) is a first pump body.

8. The air conditioning system of claim 3, wherein, The auxiliary circulating conveying part (9) is a second pump body.

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