Multi-system water chilling unit

Abstract

The utility model discloses a multi-system water chilling unit which comprises at least two heat exchange systems, at least two waterway systems and a combined heat exchanger, and the heat exchange systems can be combined to form or respectively form an independent heat exchange circulation loop by switching the serial or parallel connection state and the opening or closing state of the combined heat exchanger; the water path system can be combined to form or respectively form an independent water circulation loop, so that the heating or refrigerating capacity of the unit is obviously increased; different heat exchange circulation loops are switched and controlled by adjusting refrigerant flowing paths between the multiple heat exchange systems and the combined heat exchanger, and different water circulation loops are switched and controlled by adjusting water medium flowing paths of the multiple water path systems. Therefore, after the water chilling unit is installed, different operation modes can be selected and switched according to different heat or cooling capacity requirements, hot water or cold water with the corresponding capacity and temperature is produced, the heating or cooling capacity of the unit is matched with the actual requirement, the whole equipment or part of elements do not need to be replaced, cost is low, and maintenance is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, in particular to a chiller with multiple systems. Background Art

[0002] Chillers are a common type of heat exchange equipment in the refrigeration industry. They have the characteristics of stable heat exchange, low operating noise and little impact on the surrounding environment. They are currently widely used in newly built large buildings such as hotels, restaurants, office buildings, various factories and other usage scenarios.

[0003] The cooling or heating capacity of a single-system chiller is limited, especially in factories, office buildings, shopping malls, and other usage scenarios. In the past, the method was to purchase high-power imported compressors from abroad (commonly 1000-1400KW), which is costly and difficult to maintain. If multiple heads are connected in series or in a hybrid manner, the heating or cooling capacity of the chiller can be increased to a certain extent, but the unit can only operate according to the established conditions of adding or removing units during the process of adding or removing units from full load to minimum load or from minimum load to full load. The power consumption is high and the energy efficiency ratio is low, resulting in unsatisfactory working results. In addition, the adaptability of the unit using multiple heads in series or in a hybrid manner is poor. After installation, the product cannot match the corresponding load according to the heat or cooling requirements of different usage scenarios, nor can it achieve load control adjustment according to different cooling or heating requirements. Replacing the entire equipment or some components after installation will result in extremely high costs and inconvenient maintenance.

[0004] Therefore, there is an urgent need in the prior art for a new type of chiller with large cooling or heating capacity and a wide range of usage scenarios. Utility Model Content

[0005] In order to overcome the technical problems of insufficient cooling or heating capacity of the chiller and poor adaptability in different usage scenarios described in the above-mentioned prior art, the utility model provides a multi-system chiller, which can significantly improve the cooling or heating capacity of the chiller and can switch the usage modes of different systems, so that the cooling or heating capacity of the chiller can be achieved in multiple and independent optional combinations, which are suitable for different usage scenarios.

[0006] The technical solution adopted by the present invention to solve the problem is:

[0007] A multi-system chiller is provided, the multi-system chiller comprising at least:

[0008] a first heat exchange system and a first water system, wherein the first heat exchange system includes a first heat exchanger, and the first water system includes a first water tank and a first water pipe;

[0009] a second heat exchange system and a second water system, wherein the second heat exchange system includes a second heat exchanger, and the second water system includes a second water tank and a second water pipe;

[0010] A combined heat exchanger, the combined heat exchanger comprising at least a first heat exchange section and a second heat exchange section, wherein the first heat exchange section and the second heat exchange section are alternately arranged in sequence;

[0011] The first heat exchange section and the second heat exchange section are arranged in parallel so that the first heat exchange system and the first heat exchange section constitute a first heat exchange circulation loop, and the second heat exchange system and the second heat exchange section constitute a second heat exchange circulation loop; or the first heat exchange section and the second heat exchange section are arranged in series so that the first heat exchange system, the first heat exchange section, the second heat exchange system and the second heat exchange section constitute a third heat exchange circulation loop.

[0012] In another preferred embodiment, the present invention further provides a technical solution for the specific design of two heat exchange systems.

[0013] In this technical solution, the first heat exchange system and the second heat exchange system also include a compressor, a throttling element and a four-way valve. The compressor, the throttling element, the four-way valve, the first heat exchanger and the first heat exchange section constitute a first heat exchange circulation loop, and the compressor, the throttling element, the four-way valve, the second heat exchanger and the second heat exchange section constitute a second heat exchange circulation loop.

[0014] Furthermore, the first heat exchange system and the second heat exchange system further include a main valve, and the main valve is located between the first heat exchanger and the first heat exchange section, and between the second heat exchanger and the second heat exchange section.

[0015] Furthermore, the first heat exchange system and the second heat exchange system further include an economizer, and the economizer is connected to the outlet of the first heat exchanger, the outlet of the first heat exchange section, the outlet of the second heat exchanger or the outlet of the second heat exchange section.

[0016] Furthermore, the first heat exchange system and the second heat exchange system further include a separator, and the separator is connected to the inlet of the compressor.

[0017] In another preferred embodiment, the present invention also provides a technical solution for the specific design of two waterway systems.

[0018] In this technical solution, the first water tank and the second water tank are arranged in parallel so that the first water system and the first heat exchanger constitute a first water circulation loop, and the second water system and the second heat exchanger constitute a second water circulation loop; or, the first water tank and the second water tank are arranged in series so that the first water system, the first heat exchanger, the second water system and the second heat exchanger constitute a third water circulation loop.

[0019] Furthermore, the first water pipe and the second water pipe include an inlet pipe and an outlet pipe, the inlet pipe is used to connect the water outlet of the first water tank and the water inlet of the first heat exchanger, and to connect the water outlet of the second water tank and the water inlet of the second heat exchanger; the outlet pipe is connected to the water outlet of the first heat exchanger, and to the water outlet of the second heat exchanger.

[0020] Furthermore, the first water system and the second water system further include a water pump and a water flow switch, and the water pump and the water flow switch are located in the water inlet pipe.

[0021] Furthermore, the first water system and the second water system further include an electric heating element and a pressure sensor, wherein the electric heating element is located in the water outlet pipe, and the pressure sensor is located in the water inlet pipe and the water outlet pipe.

[0022] In another preferred embodiment, the present invention also provides a technical solution for the specific design of a combined heat exchanger.

[0023] In this technical solution, the combined heat exchanger further includes a plurality of first fans and second fans, wherein the first fans are arranged correspondingly to the first heat exchange section, and the second fans are arranged correspondingly to the second heat exchange section.

[0024] In summary, the multi-system chiller provided by the present invention has at least the following technical effects compared to the prior art:

[0025] 1) The multi-system chiller of the present invention includes at least two heat exchange systems and at least two water systems. The heat exchange systems are used to form or separately constitute independent heat exchange circulation loops in combination, and the water systems are used to form or separately constitute independent water circulation loops in combination, thereby increasing the heating or cooling capacity when multiple systems work together and significantly improving the hot water or cold water output capacity.

[0026] 2) The multi-system chiller of the present invention adjusts and controls the refrigerant flow path between the heat exchange system and different heat exchange sections by switching the series or parallel state inside the combined heat exchanger, thereby switching and controlling different heat exchange circulation loops; and adjusts the water medium flow path of the two water systems by switching the series or parallel state of the water tank, thereby switching and controlling different water circulation loops, so that after the unit is installed, the present invention can select and switch different operating modes according to different heat or cooling requirements and produce hot water or cold water of corresponding capacity and temperature, so that the heating or cooling capacity of the unit matches the actual demand, without the need to replace the entire equipment or some components, with low cost and easy maintenance. Compared with the traditional multi-head series or mixed design, the multi-system chiller of the present invention does not need to load or unload according to the load demand or even frequently start and stop the compressor, avoiding the online compressor running in the low efficiency area (high load to maximum load and low load to minimum load) for a long time, with good stability and high energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the composition of the multi-system chiller of the utility model;

[0028] Figure 2 This is a schematic diagram of the composition of the first heat exchange system, the first heat exchange section and the first water system of the present invention;

[0029] Figure 3 It is a schematic diagram of the composition of the second heat exchange system, the second heat exchange section and the second water system of the utility model;

[0030] Figure 4 This is a schematic diagram of the composition of the first water circulation loop of the present utility model;

[0031] Figure 5 This is a schematic diagram of the composition of the second water circulation loop of the present invention;

[0032] Figure 6 This is a schematic diagram of the composition of the third water circulation loop of the present utility model;

[0033] The meanings of the reference numerals are as follows:

[0034] 1. First heat exchange system; 11. First heat exchanger; 12. Compressor; 13. Throttling element; 14. Four-way valve; 15. Main valve; 16. Economizer; 17. Separator; 2. Second heat exchange system; 21. Second heat exchanger; 3. First water system; 31. First water tank; 32. Water pump; 33. Water flow switch; 34. Electric heating element; 4. Second water system; 41. Second water tank; 5. Combined heat exchanger; 51. First heat exchange section; 52. Second heat exchange section; 53. First fan; 54. Second fan; 6. Equipment terminal. DETAILED DESCRIPTION

[0035] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0038] Example 1

[0039] In the first embodiment of the present invention, a technical solution for the specific design of a heat exchange system and a water system of a multi-system chiller is provided.

[0040] See also Figure 1 As shown, according to an embodiment of the present invention, a multi-system chiller includes at least two heat exchange systems and two water systems, specifically: a first heat exchange system 1 and a second heat exchange system 2, wherein the first heat exchange system 1 includes a first heat exchanger 11, and the second heat exchange system 2 includes a second heat exchanger 21; a first water system 3 and a second water system 4, wherein the first water system 3 includes a first water tank 41 and a first water pipe, and the second water system 4 includes a second water tank 41 and a second water pipe. The first heat exchanger 11 and the second heat exchanger 21 can be used as the condenser or evaporator of the heat exchange system, respectively, for heating or cooling needs; the first water tank 31 and the second water tank 41 serve as water storage containers for the water system, outputting different capacities of hot water or cold water through the water pipes according to actual water demand.

[0041] See also Figure 1As shown, the multi-system chiller also includes a combined heat exchanger 5, which includes at least two heat exchange sections, specifically: a first heat exchange section 51 and a second heat exchange section 52, which are arranged alternately in sequence. Among them, the first heat exchanger 11 and the second heat exchanger 21 can be used as the condenser or evaporator of the heat exchange system, respectively for heating or cooling needs. In particular, when the first heat exchanger 11 and the second heat exchanger 21 are used as condensers, the first heat exchange section 51 and the second heat exchange section 52 are used as evaporators; when the first heat exchanger 11 and the second heat exchanger 21 are used as evaporators, the first heat exchange section 51 and the second heat exchange section 52 are used as condensers.

[0042] In the technical solution of this embodiment, by switching the series or parallel connection and the open or closed state of different heat exchange sections in the combined heat exchanger, the switching and selection of different heat exchange circulation loops can be achieved, thereby adapting to the actual needs of different scenarios.

[0043] This embodiment uses the technical solution of two heat exchange systems, two water systems, and two heat exchange sections as an example to explain the working mode and principle of a multi-system chiller as follows:

[0044] 1. When the first heat exchange section 51 and the second heat exchange section 52 of the combined heat exchanger 5 are arranged in parallel, the first heat exchange system 1 and the first heat exchange section 51 constitute a first heat exchange circulation loop, and the second heat exchange system 2 and the second heat exchange section 52 constitute a second heat exchange circulation loop. At this time:

[0045] 1) See Figure 2 As shown, if the first heat exchange section 51 of the combined heat exchanger 5 is working and the second heat exchange section 52 is not working, the first heat exchanger 11 in the first heat exchange system 1 exchanges heat with the water medium of the first water system 3, so that the first water system 3 produces corresponding hot water or cold water, which is directly supplied to the equipment terminal 6 such as the coil.

[0046] 2) See Figure 3 As shown, if the second heat exchange section 52 of the combined heat exchanger 5 is working and the first heat exchange section 51 is not working, the second heat exchanger 21 in the second heat exchange system 2 exchanges heat with the water medium of the second water system 4, so that the second water system 4 produces corresponding hot water or cold water, which is directly supplied to the equipment terminal 6 such as the coil.

[0047] 3) See Figure 2 and Figure 3 As shown, if the first heat exchange section 51 and the second heat exchange section 52 of the combined heat exchanger 5 work simultaneously, the first heat exchange circulation loop and the second heat exchange circulation loop respectively constitute two independent refrigerant circulation loops, so that the first water system 3 and the second water system 4 respectively produce corresponding hot water or cold water, and directly supply them to the coil and other equipment terminals 6.

[0048] 2. See Figure 1 As shown, when the first heat exchange section 51 and the second heat exchange section 52 of the combined heat exchanger 5 are arranged in series, the first heat exchange system 1, the first heat exchange section 51, the second heat exchange system 2 and the second heat exchange section 52 form a third heat exchange circulation loop. The first heat exchange section 51 and the second heat exchange section 52 of the combined heat exchanger 5 operate simultaneously, and the refrigerant flow paths of the first heat exchange system 1 and the second heat exchange system 2 remain consistent, so that the first water system 3 and the second water system 4 are combined to produce corresponding hot water or cold water. Specifically:

[0049] 1) The third heat exchange loop can be a refrigerant cycle from the first heat exchanger 11 to the first heat exchange section 51 to the second heat exchange section 52 to the second heat exchanger 21. In this case, the hot or cold water produced by the first water system 3 flows to the second water system 4, and after completing the heat exchange in the second water system 4, it is supplied to the coil and other equipment terminals 6.

[0050] 2) The third heat exchange loop can also be a refrigerant cycle from the second heat exchanger 21 to the second heat exchange section 52 to the first heat exchange section 51 to the first heat exchanger 11. In this case, the hot or cold water produced by the second water system 4 flows to the first water system 3, and after completing the heat exchange in the first water system 3, it is supplied to the coil and other equipment terminals 6.

[0051] In particular, the open or closed state of the first heat exchange section 51 and the second heat exchange section 52, as well as the series or parallel state between the two, can be achieved by an on-off valve or a combination of an on-off valve and a one-way valve in the pipeline. Of course, the combined heat exchanger of the present invention is not limited to the above two design methods.

[0052] Therefore, the multi-system chiller of the present invention can increase the heating or cooling capacity when the multiple systems work together by designing at least two heat exchange systems and at least two water systems, and significantly improve the hot water or cold water production capacity. In addition, the present invention adjusts the refrigerant flow path between the two heat exchange systems and the combined heat exchanger by controlling the open and close states and series-parallel states of different heat exchange sections, thereby switching and controlling different heat exchange circulation loops; and switches and controls different water circulation loops by adjusting the water medium flow path of the two water systems. Through the above-mentioned design method, after the chiller is installed, the present invention can select and switch different operating modes according to different heat or cooling requirements, and produce hot water or cold water of corresponding capacity and temperature, so that the heating or cooling capacity of the unit matches the actual demand, without the need to replace the entire equipment or some components, with low cost and easy maintenance.

[0053] Specifically, the first heat exchanger 11 and the second heat exchanger 21 of this embodiment may preferably be plate heat exchangers, and the first heat exchange section 51 and the second heat exchange section 52 may preferably be fin-tube heat exchangers.

[0054] Example 2

[0055] In the second embodiment of the present invention, a technical solution for the specific design of two heat exchange systems is provided on the basis of the first embodiment.

[0056] See also Figure 2 and Figure 3 As shown, in the technical solution of this embodiment, the first heat exchange system 1 and the second heat exchange system 2 further include a compressor 12, a throttling element 13 and a four-way valve 14. The compressor 12, the throttling element 13, the four-way valve 14, the first heat exchanger 11 and the first heat exchange section 51 constitute a first heat exchange circulation loop, and the compressor 12, the throttling element 13, the four-way valve 14, the second heat exchanger 21 and the second heat exchange section 52 constitute a second heat exchange circulation loop. The refrigerant flow path of the first heat exchange circulation loop is: compressor 12-four-way valve 14-first heat exchanger 11-throttling element 13-first heat exchange section 51-four-way valve 14-compressor 12 (in this case, the first water system produces hot water), or: compressor 12-four-way valve 14-first heat exchange section 51-throttling element 13-first heat exchanger 11-four-way valve 14-compressor 12 (in this case, the first water system produces cooling water). Similarly, the refrigerant flow path of the second heat exchange circulation loop is: compressor 12-four-way valve 14-second heat exchanger 21-throttling element 13-second heat exchange section 52-four-way valve 14-compressor 12 (at this time the second water system is producing hot water), or: compressor 12-four-way valve 14-second heat exchange section 52-throttling element 13-second heat exchanger 21-four-way valve 14-compressor 12 (at this time the second water system is producing cooling water).

[0057] In addition, the compressor 12, the throttling element 13, the four-way valve 14, the first heat exchanger 11, the first heat exchange section 51, the second heat exchanger 21, and the second heat exchange section 52 can also form a third heat exchange circulation loop. In this case, the refrigerant flow path is (for ease of distinction, the components in the first heat exchange system are uniformly named with the prefix "first", and the components in the second heat exchange system are uniformly named with the prefix "second"):

[0058] 1) First compressor 12 - four-way valve 14 - first heat exchanger 11 - first throttling element 13 - first heat exchange section 51 - four-way valve 14 - second compressor 12 - four-way valve 14 - second heat exchanger 21 - second throttling element 13 - second heat exchange section 52 - four-way valve 14 - first compressor 12 (at this point, the first water system and the second water system combine to produce hot water, and the hot water is ultimately output through the second water system);

[0059] 2) Second compressor 12 - four-way valve 14 - second heat exchanger 21 - second throttling element 13 - second heat exchange section 52 - four-way valve 14 - first compressor 12 - four-way valve 14 - first heat exchanger 11 - first throttling element 13 - first heat exchange section 51 - four-way valve 14 - second compressor 12 (at this point, the first water system and the second water system combine to produce hot water, and the hot water is ultimately output through the first water system);

[0060] 3) First compressor 12 - four-way valve 14 - first heat exchange section 51 - first throttling element 13 - first heat exchanger 11 - four-way valve 14 - second compressor 12 - four-way valve 14 - second heat exchange section 52 - second throttling element 13 - second heat exchanger 21 - four-way valve 14 - first compressor 12 (at this point, the first water system and the second water system combine to cool water, and the cold water is ultimately output through the second water system);

[0061] 4) Second compressor 12 - four-way valve 14 - second heat exchange section 52 - second throttling element 13 - second heat exchanger 21 - four-way valve 14 - first compressor 12 - four-way valve 14 - first heat exchange section 51 - first throttling element 13 - first heat exchanger 11 - four-way valve 14 - second compressor 12 (at this time, the first water system and the second water system combine to cool the water, and finally output the cold water through the first water system).

[0062] Further, see Figure 2 and Figure 3 As shown, the first heat exchange system 1 and the second heat exchange system 2 further include a main valve 15, which is located between the first heat exchanger 11 and the first heat exchange section 51, and between the second heat exchanger 21 and the second heat exchange section 51. The main valve 15 is used to control the flow of refrigerant between the first heat exchanger 11 and the first heat exchange section 51, and between the second heat exchanger 21 and the second heat exchange section 52. Specifically, when the first heat exchange section 51 and the second heat exchange section 52 are connected in series, or when the first heat exchange section 51 and the second heat exchange section 52 are connected in parallel and the first heat exchange section 51 is operating, the main valve 15 of the first heat exchange system 1 is opened, thereby forming the third heat exchange circuit or the first heat exchange circuit, respectively. Similarly, when the first heat exchange section 51 and the second heat exchange section 52 are connected in series, or when the first heat exchange section 51 and the second heat exchange section 52 are connected in parallel and the second heat exchange section 52 is operating, the main valve 15 of the second heat exchange system 2 is opened, thereby forming the third heat exchange circuit or the second heat exchange circuit, respectively.

[0063] See also Figure 2 and Figure 3As shown, in an optional solution of this embodiment, the first heat exchange system 1 and the second heat exchange system 2 further include an economizer 16, and the economizer 16 is connected to the outlet of the first heat exchanger 11, the outlet of the first heat exchange section 51, the outlet of the second heat exchanger 21, or the outlet of the second heat exchange section 52. The economizer 16 is essentially a heat exchanger, which is used to supercool the refrigerant flowing through it, thereby improving the efficiency and performance of the refrigeration system. Taking the first heat exchange circulation loop used for heating function as an example, the first heat exchanger 11 is a condenser, and the economizer 16 is connected to the outlet of the first heat exchanger 11; taking the first heat exchange circulation loop used for cooling function as an example, the first heat exchange section 51 is a condenser, and the economizer 16 is connected to the outlet of the first heat exchange section 51. The design ideas of the remaining circulation loops are the same and will not be repeated here.

[0064] See also Figure 2 and Figure 3 As shown, in another optional solution of this embodiment, the first heat exchange system 1 and the second heat exchange system 2 further include a separator 17, which is respectively connected to the inlet of the compressor 12 of the first heat exchange system 1 and the second heat exchange system 2. The separator 17 is used to separate the gas and liquid of the refrigerant before entering the compressor 12, thereby preventing the compressor 12 from being damaged by liquid hammer.

[0065] To avoid ambiguity, it should be specifically noted that the compressor 12, throttling element 13, four-way valve 14, main valve 15, economizer 16, and separator 17 described in the present invention are each provided with at least one in the first heat exchange system 1 and the second heat exchange system 2. For example, the compressor 12 in the first heat exchange system 1 includes at least a first compressor, the compressor 12 in the second heat exchange system 2 includes at least a second compressor, and so on.

[0066] Example 3

[0067] In the third embodiment of the present utility model, a technical solution for the specific design of two waterway systems is provided on the basis of the first embodiment.

[0068] In the technical solution of this embodiment, the switching and selection of different water circulation loops can be achieved through the series or parallel connection of water tanks, thereby adapting to the actual needs of different scenarios.

[0069] This embodiment takes the technical solution of two heat exchange systems, two water systems and two heat exchange sections as an example to explain the working mode and principle of the multi-system chiller as follows.

[0070] 1. When the first water tank 31 and the second water tank 41 are arranged in parallel, the first water system 3 and the first heat exchanger 11 form a first water circulation loop, and the second water system 4 and the second heat exchanger 21 form a second water circulation loop. At this time:

[0071] 1) See Figure 4 As shown, if the first heat exchange circulation loop is working and the second heat exchange circulation loop is not working, the first water circulation loop is working (first water tank 31-first heat exchanger 11-equipment terminal 6-first water tank 31), that is, the first water system 3 produces corresponding hot water or cold water and directly supplies it to the equipment terminal 6 such as the coil.

[0072] 2) See Figure 5 As shown, if the second heat exchange circulation loop is working and the first heat exchange circulation loop is not working, the second water circulation loop is working (second water tank 41-second heat exchanger 21-equipment terminal 6-second water tank 41), that is, the second water system 4 produces corresponding hot water or cold water and directly supplies it to the equipment terminal 6 such as the coil.

[0073] 3) See Figure 4 and Figure 5 As shown, if the first heat exchange circulation loop and the second heat exchange circulation loop work simultaneously, the first water circulation loop and the second water circulation loop work simultaneously, the first water system 3 and the second water system 4 respectively produce corresponding hot water or cold water, and respectively supply them to the equipment terminal 6.

[0074] 2. See Figure 6 As shown, when the first water tank 31 and the second water tank 41 are arranged in series, the first water system 3, the first heat exchanger 11, the second water system 4 and the second heat exchanger 21 constitute a third water circulation loop. According to the different refrigerant flow paths of the third heat exchange circulation loop, it can be divided into:

[0075] 1) First water tank 31 - first heat exchanger 11 - second water tank 41 - second heat exchanger 21 - equipment terminal 6 - first water tank 31. At this time, the hot or cold water produced by the first water system 3 flows to the second water system 4, and after completing the heat exchange in the second water system 4, it is supplied to the equipment terminal 6 such as the coil.

[0076] 2) Second water tank 41 - second heat exchanger 21 - first water tank 31 - first heat exchanger 11 - equipment terminal 6 - second water tank 41. At this time, the hot water or cold water produced by the second water system 4 flows to the first water system 3, and after completing the heat exchange in the first water system 3, it is supplied to the equipment terminal 6 such as the coil.

[0077] Preferably, the first water pipe and the second water pipe include an inlet pipe and an outlet pipe, the inlet pipe is used to connect the water outlet of the first water tank 31 and the water inlet of the first heat exchanger 11, and to connect the water outlet of the second water tank 31 and the water inlet of the second heat exchanger 21; the outlet pipe is connected to the water outlet of the first heat exchanger 11, and to the water outlet of the second heat exchanger 21.

[0078] Therefore, see Figure 4As shown, the first water circulation loop formed by the first water tank 31 and the first heat exchanger 11 is: first water tank 31 - water inlet pipe - first heat exchanger 11 - water outlet pipe - equipment terminal 6 - first water tank 31.

[0079] See also Figure 5 As shown, the second water circulation loop formed by the second water tank 41 and the second heat exchanger 21 is: second water tank 41 - water inlet pipe - second heat exchanger 21 - water outlet pipe - equipment terminal 6 - second water tank 41.

[0080] See also Figure 6 As shown, the third water circulation loop composed of the first water tank 31, the first heat exchanger 11, the second water tank 41 and the second heat exchanger is: first water tank 31-water inlet pipe-first heat exchanger 11-water outlet pipe-second water tank 41-second heat exchanger 21-equipment terminal 6-first water tank 31; or: second water tank 41-water inlet pipe-second heat exchanger 21-water outlet pipe-first water tank 31-first heat exchanger 11-equipment terminal 6-second water tank 41.

[0081] Further, see Figure 2 and Figure 3 As shown, the first water system 3 and the second water system 4 further include a water pump 32 and a water flow switch 33, which are located in the water inlet pipe. The water pump 32 is used to provide power for the flow of water in the first water circulation loop, the second water circulation loop, and the third water circulation loop, and the water flow switch 33 is used to control the water flow of the water system according to environmental signals, thereby realizing switching control of different water circulation loops.

[0082] Further, see Figure 2 and Figure 3 As shown, the first and second water systems 3 and 4 further include an electric heating element 34 and a pressure sensor (not shown). The electric heating element 34 is located in the outlet pipe, and the pressure sensors are located in the inlet and outlet pipes. Specifically, the electric heating element 34 is used to increase the outlet water temperature of the water system when the water system is in heating mode and is activated when the heating capacity of the first heat exchanger 11 or the second heat exchanger 21 is insufficient. The pressure sensor is used to monitor the pressure value of the water system in real time to ensure stable circulation of the water system.

[0083] Example 4

[0084] In the fourth embodiment of the present utility model, a technical solution for the specific design of a combined heat exchanger is provided on the basis of the first embodiment.

[0085] In the technical solution of this embodiment, the combined heat exchanger 5 also includes a plurality of first fans 53 and second fans 54. The first fans 53 are provided in correspondence with the first heat exchange section 51, and the second fans 54 are provided in correspondence with the second heat exchange section 52. The first fans 53 are used to accelerate air flow in the first heat exchange section 51, and the second fans 54 are used to accelerate air flow in the second heat exchange section 52, thereby enhancing the heat exchange effect of the combined heat exchanger 5. Specifically, when the first heat exchange loop is operating, the first fans 53 are turned on; when the second heat exchange loop is operating, the second fans 54 are turned on; and when the third heat exchange loop is operating, both the first fans 53 and the second fans 54 are in the on state.

[0086] The technical means disclosed in the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. Multi-system chiller, characterized in that: At least: a first heat exchange system and a first water system, wherein the first heat exchange system includes a first heat exchanger, and the first water system includes a first water tank and a first water pipe; a second heat exchange system and a second water system, wherein the second heat exchange system includes a second heat exchanger, and the second water system includes a second water tank and a second water pipe; A combined heat exchanger, the combined heat exchanger comprising at least a first heat exchange section and a second heat exchange section, wherein the first heat exchange section and the second heat exchange section are alternately arranged in sequence; The first heat exchange section and the second heat exchange section are arranged in parallel so that the first heat exchange system and the first heat exchange section constitute a first heat exchange circulation loop, and the second heat exchange system and the second heat exchange section constitute a second heat exchange circulation loop; or the first heat exchange section and the second heat exchange section are arranged in series so that the first heat exchange system, the first heat exchange section, the second heat exchange system and the second heat exchange section constitute a third heat exchange circulation loop.

2. The multi-system chiller according to claim 1, characterized in that: The first heat exchange system and the second heat exchange system also include a compressor, a throttling element and a four-way valve. The compressor, the throttling element, the four-way valve, the first heat exchanger and the first heat exchange section constitute a first heat exchange circulation loop, and the compressor, the throttling element, the four-way valve, the second heat exchanger and the second heat exchange section constitute a second heat exchange circulation loop.

3. The multi-system chiller according to claim 2, characterized in that: The first heat exchange system and the second heat exchange system further include a main valve, wherein the main valve is located between the first heat exchanger and the first heat exchange section, and between the second heat exchanger and the second heat exchange section.

4. The multi-system chiller according to claim 3, characterized in that: The first heat exchange system and the second heat exchange system further include an economizer, which is connected to the outlet of the first heat exchanger, the outlet of the first heat exchange section, the outlet of the second heat exchanger, and the outlet of the second heat exchange section.

5. The multi-system chiller according to claim 3, characterized in that: The first heat exchange system and the second heat exchange system further include a separator, and the separator is connected to the inlet of the compressor.

6. The multi-system chiller according to claim 1, characterized in that: The first water tank and the second water tank are arranged in parallel so that the first water system and the first heat exchanger constitute a first water circulation loop, and the second water system and the second heat exchanger constitute a second water circulation loop; or, the first water tank and the second water tank are arranged in series so that the first water system, the first heat exchanger, the second water system and the second heat exchanger constitute a third water circulation loop.

7. The multi-system chiller according to claim 6, characterized in that: The first water pipe and the second water pipe include an inlet pipe and an outlet pipe. The inlet pipe is used to connect the water outlet of the first water tank and the water inlet of the first heat exchanger, and to connect the water outlet of the second water tank and the water inlet of the second heat exchanger; the outlet pipe is connected to the water outlet of the first heat exchanger and to the water outlet of the second heat exchanger.

8. The multi-system chiller according to claim 7, characterized in that: The first water system and the second water system further include a water pump and a water flow switch, and the water pump and the water flow switch are located in the water inlet pipe.

9. The multi-system chiller according to claim 8, characterized in that: The first water system and the second water system further include an electric heating element and a pressure sensor. The electric heating element is located in the water outlet pipe, and the pressure sensor is located in the water inlet pipe and the water outlet pipe.

10. The multi-system chiller according to claim 1, characterized in that: The combined heat exchanger further includes a plurality of first fans and second fans, wherein the first fans are arranged correspondingly to the first heat exchange sections, and the second fans are arranged correspondingly to the second heat exchange sections.

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