Water chilling unit for double-cold-source energy storage

Abstract

The utility model relates to a water chilling unit for double-cold-source energy storage, which comprises a refrigerant refrigerating loop, a natural air cooling loop and a water supply loop, and the water supply loop comprises a water return pipe and a water supply pipe. The water return pipe and the water supply pipe are connected with the inlet end and the outlet end of a plate heat exchanger water flow channel respectively, the inlet end of the natural air cooling loop is connected to the water return pipe, and the outlet end of the natural air cooling loop is selectively connected with the inlet end or the outlet end of the plate heat exchanger water flow channel through a pipeline. And an air cooling heat exchanger is connected in series on a pipeline between the inlet end and the outlet end of the natural air cooling loop. According to the utility model, refrigerant refrigeration and natural air refrigeration are connected in series, so that when the environment temperature is lower than the return water temperature, natural air cooling can be used, the natural air cooling is utilized to the maximum extent, and the purpose of reducing the operation energy consumption of the unit is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cold water unit technical field especially is related to a double cold source energy storage cold water unit. BACKGROUND

[0002] With the development of new energy technology, energy storage systems are increasingly used in new energy, photovoltaic, power stations and other fields. A large number of battery compartments, energy storage inverters (PCS) and other electronic components are installed in the energy storage system. Overcooling and overheating during operation of the energy storage system can cause faults in the energy storage system.

[0003] The existing double cold source energy storage cold water unit includes compressor refrigerant refrigeration and natural air cooling. In winter, in areas where the ambient temperature is lower than the required return water temperature, the energy consumption of natural air cooling is much lower than that of compressor refrigeration. Therefore, natural cooling is used to reduce the energy consumption of traditional refrigerant circulation refrigeration and achieve energy saving and consumption reduction. However, in the existing scheme, the two cold sources are basically connected in parallel, and natural wind can only be fully utilized when the return water temperature and the ambient temperature reach a certain temperature difference. SUMMARY

[0004] The utility model mainly solves the technical problem that can fully utilize natural wind to realize refrigeration and reduce the energy consumption of the unit.

[0005] To solve the above technical problems, the basic idea of the technical scheme of the utility model is as follows:

[0006] A double cold source energy storage cold water unit includes a refrigerant refrigeration circuit, a natural air cooling circuit and a water supply circuit. The water supply circuit includes a return water pipe and a water supply pipe. The refrigerant flow passage of the plate heat exchanger is connected to the refrigerant refrigeration circuit. The return water pipe and the water supply pipe are respectively connected to the inlet end and the outlet end of the water flow passage of the plate heat exchanger. The inlet end of the natural air cooling circuit is connected to the return water pipe. The outlet end of the natural air cooling circuit is selectively connected to the inlet end or the outlet end of the water flow passage of the plate heat exchanger through a pipeline. A wind-cooled heat exchanger is connected in series between the inlet end and the outlet end of the natural air cooling circuit.

[0007] Further, the outlet end of the natural air cooling circuit is connected in series with a first electronic three-way valve. The first outlet of the first electronic three-way valve is connected to the inlet end of the water flow passage of the plate heat exchanger through a pipeline. The second outlet of the first electronic three-way valve is connected to the outlet end of the water flow passage of the plate heat exchanger through a pipeline. The connection pipeline between the natural air cooling circuit and the inlet end or the outlet end of the water flow passage of the plate heat exchanger is controlled by the first electronic three-way valve.

[0008] Further, a bypass branch is connected between the water return pipe and the water supply pipe of the water supply circuit, and a control valve is connected in series on the bypass branch, and the water return pipe, the bypass branch and the water supply pipe form a bypass water circuit.

[0009] Further, an inlet end of the bypass branch is connected to the water return pipe on the inlet side of the natural air cooling circuit.

[0010] Further, the control valve is an electronic two-way valve.

[0011] Further, an electric heater and a water pump are connected in series on the water return pipe in sequence along the water flow direction, and the connection position of the bypass branch and the water return pipe is on the water outlet side of the water pump.

[0012] Further, the inlet end of the natural air cooling circuit is connected to the water return pipe through a second electronic three-way valve, the second electronic three-way valve is connected in series on the water return pipe, and the opening and closing of the natural air cooling circuit is controlled through the second electronic three-way valve.

[0013] Further, the refrigerant cooling circuit is composed of a compressor, a condenser, a throttling element and a refrigerant flow channel of a plate heat exchanger connected through pipelines, and the air-cooled heat exchanger and the condenser are arranged side by side and share one condensing fan.

[0014] Further, temperature sensors are connected in series on the water return pipe, the water supply pipe and the natural air cooling circuit respectively.

[0015] Further, the unit comprises a controller, and the controller comprises a refrigerant cooling control module, a natural air cooling control module, a mixed cooling control module, an environment temperature acquisition module and a water return temperature acquisition module.

[0016] When the environment temperature acquired by the environment temperature acquisition module is lower than the water return temperature acquired by the water return temperature acquisition module and the temperature difference is less than or equal to a set temperature, the mixed cooling control module is controlled to act, the mixed cooling control module controls the outlet end of the natural air cooling circuit to be connected to the inlet end of the water flow channel of the plate heat exchanger, and the water return enters the water supply pipe after being heat-exchanged by the air-cooled heat exchanger and the water flow channel of the plate heat exchanger in sequence.

[0017] When the environment temperature is lower than the water return temperature and the temperature difference is greater than a set temperature, the natural air cooling control module is controlled to act, and the natural air cooling control module controls the outlet end of the natural air cooling circuit to be connected to the outlet end of the water flow channel of the plate heat exchanger, and the water return enters the water supply pipe after being heat-exchanged by the air-cooled heat exchanger.

[0018] Compared with the prior art, the dual-cold-source energy storage water chiller provided by the utility model has the following advantages:

[0019] (1) The utility model discloses a series connection of refrigerant refrigeration and natural wind refrigeration, when the ambient temperature is lower than the return water temperature, natural wind cooling can be used, and when the cooling capacity provided by natural wind cooling is insufficient, refrigerant refrigeration can be used to supplement the cooling capacity, and when the ambient temperature is low enough, the cooling capacity required by the water chiller can be provided by natural wind cooling.

[0020] (2) The utility model discloses a bypass branch between the return water pipe and the water supply pipe, the bypass branch can be used to adjust the water supply temperature, and when the return water does not need refrigeration to meet the cooling capacity demand, the return water does not pass through the natural wind cooling refrigeration circuit and the refrigerant refrigeration circuit any more, and is sent out by the bypass branch. By setting the bypass branch, the water flow resistance can be reduced to the maximum, thereby reducing the rotation speed of the water pump to the maximum, and the energy-saving and power-saving purpose is further achieved.

[0021] The specific embodiments of the utility model will be described in further detail below with reference to the drawings. DRAWINGS

[0022] The drawings are part of the utility model and are used to provide further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model, but do not constitute improper limitation on the utility model. Obviously, the drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] In the drawings:

[0024] Figure 1 is the system structure diagram of the utility model unit;

[0025] Figure 2 is the system flow chart of the utility model unit when working in the refrigerant refrigeration mode;

[0026] Figure 3 is the system flow chart of the utility model unit when working in the mixed refrigeration mode;

[0027] Figure 4 is the system flow chart of the utility model unit when working in the natural wind cooling refrigeration mode;

[0028] Figure 5 is the system flow chart of the utility model unit when working in the self-circulation mode or the low-temperature heating mode.

[0029] In the drawings:

[0030] Compressor 1, condenser 2, throttling element 3, plate heat exchanger 4, refrigerant flow channel 41, water flow channel 42, inlet end 42a, outlet end 42b, condensing fan 5, return pipe 6, water supply pipe 7, first temperature sensor 8, second temperature sensor 9, first pressure sensor 10, second pressure sensor 11, electric heater 12, water pump 13, air-cooled heat exchanger 14, second electronic three-way valve 15, inlet 15a, first outlet 15b, second outlet 15c, third temperature sensor 16, first electronic three-way valve 17, first outlet 17a, second outlet 17b, inlet 17c, bypass branch 18, electronic two-way valve 19.

[0031] It should be noted that the drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "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.

[0034] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0035] like Figure 1 As shown, this embodiment provides a dual-cold-source energy storage chiller, including a refrigerant refrigeration circuit, a natural air cooling circuit, and a water supply circuit.

[0036] In this embodiment, the refrigerant refrigeration circuit is formed by connecting the compressor 1, the condenser 2, the throttling element 3 and the refrigerant flow passage 41 of the plate heat exchanger 4 in sequence through pipelines. The refrigerant is compressed into high-temperature and high-pressure gas by the compressor 1, and then enters the condenser 2. The refrigerant is condensed into liquid state by releasing heat in the condenser 2. The liquid refrigerant is throttled and depressurized by the throttling element 3, and then enters the refrigerant flow passage 41 of the plate heat exchanger 4. The refrigerant exchanges heat with the return water in the water flow passage 42 of the plate heat exchanger 4, the return water releases heat and is cooled, and the refrigerant absorbs heat and evaporates. The evaporated refrigerant gas is introduced into the compressor 1, forming a refrigerant refrigeration cycle. The throttling element 3 is preferably an electronic expansion valve, and the condenser 2 is provided with a condenser fan 5.

[0037] In this embodiment, the water supply circuit includes a return water pipe 6 and a water supply pipe 7. One end of the return water pipe 6 is connected to an energy storage device (such as a battery compartment), and the other end of the return water pipe 6 is connected to the inlet end 42a of the water flow passage 42 of the plate heat exchanger 4. One end of the water supply pipe 7 is connected to the outlet end 42b of the water flow passage 42 of the plate heat exchanger 4, and the other end of the water supply pipe 7 is connected to the battery compartment. The high-temperature return water after heat exchange with the battery in the battery compartment enters the water flow passage 42 of the plate heat exchanger 4 through the return water pipe 6, exchanges heat with the low-temperature refrigerant in the refrigerant flow passage 41, and releases heat to reduce the temperature. The low-temperature water is then re-supplied to the battery compartment through the water supply pipe 7 to exchange heat with the battery and cool the battery.

[0038] In this embodiment, a first temperature sensor 8 is further connected in series on the return water pipe 6 for detecting the return water temperature, and the first temperature sensor 8 is arranged at the inlet of the return water pipe 6. A second temperature sensor 9 is connected in series on the water supply pipe 7 for detecting the water supply temperature, and the second temperature sensor 9 is arranged at the outlet of the water supply pipe 7. In this embodiment, a first pressure sensor 10 is further connected in series on the return water pipe 6, and a second pressure sensor 11 is further connected in series on the water supply pipe 7 for detecting the return water pressure and the water supply pressure, respectively.

[0039] In this embodiment, an electric heater 12 and a water pump 13 are further connected in series on the return water pipe 6 along the water flow direction. Under the driving of the water pump 13, the water circulates and flows back and forth to continuously cool the battery in the battery compartment. Since the working temperature of the battery is strictly required, it cannot be too high or too low. When the return water temperature is too low, the electric heater 12 is started to heat the water to warm up the battery. The first temperature sensor 8 and the first pressure sensor 10 are both arranged on the water inlet side of the electric heater 12.

[0040] In this embodiment, the inlet end of the natural air cooling loop is connected to the return water pipe 6, and is located at the water outlet side of the water pump 13, so that the water pump 13 can drive the water to flow in the natural air cooling loop. The outlet end of the natural air cooling loop is optionally connected to the inlet end 42a or the outlet end 42b of the water flow channel 42 of the plate heat exchanger 4 through a pipe, and the air cooling heat exchanger 14 is connected in series between the inlet end and the outlet end of the natural air cooling loop.

[0041] In this embodiment, the air cooling heat exchanger 14 is preferably arranged in parallel with the condenser 2, and shares a condenser fan 5, so as to simplify the structure of the unit and reduce the cost. A third temperature sensor 16 is further connected in series in the natural air cooling loop, for detecting the return water temperature after heat exchange in the air cooling heat exchanger 14.

[0042] In this embodiment, the inlet end of the natural air cooling loop is connected to the return water pipe 6 through the second electronic three-way valve 15. The second electronic three-way valve 15 is connected in series to the return water pipe 6, and is located at the water outlet side of the water pump 13. Specifically, the inlet 15a of the second electronic three-way valve 15 is connected to the return water pipe 6 at the water outlet side of the water pump 13, the inlet end of the natural air cooling loop is connected to the first outlet 15b of the second electronic three-way valve 15, and the second outlet 15c of the second electronic three-way valve 15 is connected to the inlet end 42a of the water flow channel 42 of the plate heat exchanger 4. By controlling the opening and closing of the first outlet 15b of the second electronic three-way valve 15, the opening and closing of the natural air cooling loop can be controlled. When the first outlet 15b is opened and the second outlet 15c is closed, the return water is driven by the water pump 13 to sequentially pass through the inlet 15a and the first outlet 15b of the second electronic three-way valve 15, enter the natural air cooling loop, and then pass through the air cooling heat exchanger 14 for heat release and cooling. When the first outlet 15b is closed and the second outlet 15c is opened, the return water is directly driven by the water pump 13 to enter the water flow channel 42 of the plate heat exchanger 4 to exchange heat with the refrigerant, and the natural air cooling loop is disconnected.

[0043] In this embodiment, the outlet end of the natural air cooling loop is connected in series with the first electronic three-way valve 17, the first outlet 17a of the first electronic three-way valve 17 is connected to the inlet end 42a of the water flow channel 42 of the plate heat exchanger 4 through a pipe, and the connection point is located at the water outlet side of the second outlet 15c of the second electronic three-way valve 15, and the second outlet 17b of the first electronic three-way valve 17 is connected to the outlet end 42b of the water flow channel 42 of the plate heat exchanger 4 through a pipe. By controlling the opening and closing of the first outlet 17a and the second outlet 17b of the first electronic three-way valve 17, the opening and closing of the connecting pipe between the natural air cooling loop and the inlet end 42a or the outlet end 42b of the water flow channel of the plate heat exchanger 4 can be controlled.

[0044] When the first outlet 17a is opened, the second outlet 17b is disconnected, the water after heat exchange with the air-cooled heat exchanger 14 in the natural air cooling circuit sequentially passes through the inlet 17c and the first outlet 17a of the first electronic three-way valve 17, enters the water flow channel 42 of the plate heat exchanger 4, and is subjected to secondary heat exchange with the refrigerant of the plate heat exchanger 4. The water after heat release and temperature reduction enters the water supply pipe 7 again to flow back to the battery cabin. In this process, the refrigerant cooling of the compressor 1 and the natural air cooling are in series, that is, the air-cooled heat exchanger 7 and the plate heat exchanger 4 are in series, and the natural air and the refrigerant are used to complement each other to provide cold energy for the battery cabin on the water supply side. When the ambient temperature is lower than the return water temperature, the natural air is mainly used for refrigeration. When the required refrigerant cooling capacity is not large, the operating power of the compressor 1 can be effectively reduced to achieve the purpose of energy saving and power saving.

[0045] When the first outlet 17a is disconnected, the second outlet 17b is opened, and the water after heat exchange with the air-cooled heat exchanger 14 in the natural air cooling circuit directly enters the water supply pipe 7 to flow back to the battery cabin. That is, when the ambient temperature is low enough, the cooling capacity required by the water chiller can be completely provided by the natural air cooling. In this process, the compressor 1 is no longer needed to provide cooling capacity, and the purpose of energy saving and power saving is achieved.

[0046] In this embodiment, it is further preferred that a bypass branch 18 is connected between the return water pipe 6 and the water supply pipe 7 of the water supply circuit, and a control valve is connected in series on the bypass branch 18. The control valve is preferably an electronic two-way valve 19. The return water pipe 6, the bypass branch 18 and the water supply pipe 7 form a bypass water circuit. Part of the water flows out of the bypass branch 18, and part of the water enters the natural air cooling circuit or the plate heat exchanger 4. The inlet end of the bypass branch 18 is connected to the return water pipe 6 on the inlet side of the natural air cooling circuit, that is, between the water pump 13 and the second electronic three-way valve 15. By controlling the electronic two-way valve 19, the opening and closing of the bypass branch 18 and the water flow introduced into the bypass branch 18 can be controlled.

[0047] When the system does not require a large cooling capacity, or the return water temperature can meet the battery cooling demand and needs to be heated when the return water temperature is low, the electronic two-way valve 19 can be opened to directly flow part of the return water back to the water supply pipe 7 through the bypass branch 18. This part of the return water does not pass through the plate heat exchanger 4 for heat exchange, and can be used to adjust the water supply temperature. In this way, the water flow resistance can be reduced to the greatest extent, thereby reducing the rotating speed of the water pump 13 to the greatest extent, and the water pump 13 requires a small pressure head and a small power, thereby achieving energy saving and power saving.

[0048] In this embodiment, the water chiller has five working modes, which are refrigerant cooling mode, natural air cooling mode, mixed cooling mode in which the refrigerant cooling and the natural air cooling are used simultaneously, self-circulation mode and low-temperature heating mode.

[0049] In this embodiment, the controller includes a refrigerant cooling control module, a natural wind cooling control module, a mixed cooling control module, an ambient temperature acquisition module, and a return water temperature acquisition module. It also includes a self-circulation control module and a low-temperature heating control module. The ambient temperature acquisition module is used to acquire the ambient temperature To. The ambient temperature acquisition module is a temperature sensor (not shown in the figure) for detecting the outdoor temperature. The return water temperature acquisition module is used to acquire the return water temperature Ti at the inlet end of the return water pipe 6. The return water temperature Ti is detected by the first temperature sensor 8. The controller controls the refrigerant cooling control module, the natural wind cooling control module, the mixed cooling control module, the self-circulation control module, and the low-temperature heating control module to act according to the detected ambient temperature To and return water temperature Ti, so as to realize different working modes.

[0050] As shown in Figure 2 When the detected ambient temperature To is greater than the return water temperature Ti, the controller controls the refrigerant cooling control module to act, entering the refrigerant cooling mode. In this working mode, all the cooling capacity required for the battery compartment cooling is provided by the refrigerant cooling circuit.

[0051] Specifically, in this working mode, the refrigerant cooling control module controls the compressor 1 and the condenser fan 5 to start, and controls the first outlet 15b of the second electronic three-way valve 15 to be disconnected and the second outlet 15c to be opened. The return water does not pass through the natural wind cooling circuit, but enters the water flow channel 42 of the plate heat exchanger 4. The return water exchanges heat with the low-temperature refrigerant in the plate heat exchanger 4, and the return water is cooled by heat release. The low-temperature water after cooling flows back to the battery compartment through the water supply pipe 7 to cool the battery.

[0052] As shown in Figure 3 When the detected ambient temperature To is lower than the return water temperature Ti, and the temperature difference Δt is less than or equal to the set temperature Δt s , the controller controls the mixed cooling control module to act, entering the mixed cooling mode. The set temperature Δt s is preferably 5℃. In this working mode, the cooling relying on natural wind alone is still insufficient to meet the cooling capacity requirement of the battery cooling, and the refrigerant cooling is still needed to supplement the cooling capacity.

[0053] Specifically, in this operating mode, the hybrid refrigeration control module controls the start-up of the compressor 1 and the condensing fan 5, while simultaneously controlling the opening of the first outlet 15b and the disconnection of the second outlet 15c of the second electronic three-way valve 15. It also controls the opening of the first outlet 17a and the disconnection of the second outlet 17b of the first electronic three-way valve 17. Under the action of the water pump 13, the return water enters the natural air cooling circuit. The return water undergoes a primary heat exchange and cooling process through the air-cooled heat exchanger 14. After this primary heat exchange and cooling process, the water then passes through the inlet 17c and first outlet 17a of the first electronic three-way valve 17 in sequence, entering the water flow channel 42 of the plate heat exchanger 4, undergoing a secondary heat exchange with the refrigerant in the plate heat exchanger 4. After the secondary heat release and cooling process, the water then enters the water supply pipe 7 and flows back to the battery compartment.

[0054] In this mode, natural wind is mainly used for cooling, and the required cooling capacity of the refrigerant is relatively small, which can effectively reduce the operating power of the compressor 1 and achieve the purpose of energy saving and electricity saving.

[0055] like Figure 4 As shown, when the detected ambient temperature To is lower than the return water temperature Ti, and the temperature difference Δt is greater than the set temperature Δt s (Set temperature Δt s When the temperature is preferably 5°C, the controller controls the natural air cooling control module to operate and enter the natural air cooling mode.

[0056] Specifically, in this operating mode, the natural air cooling control module shuts down compressor 1 and starts condenser fan 5. It also disconnects first outlet 15b and opens second outlet 15c of second electronic three-way valve 15. It also disconnects first outlet 17a and opens second outlet 17b of first electronic three-way valve 17. Return water, driven by water pump 13, enters the natural air cooling circuit. The return water passes through air-cooled heat exchanger 14 for heat exchange and cooling. The cooled water then flows through inlet 17c and second outlet 17b of first electronic three-way valve 17, enters water supply pipe 7, and flows back to the battery compartment. During this process, the return water no longer passes through plate heat exchanger 4.

[0057] In this mode, the ambient temperature To is low enough, and natural wind can be fully utilized for cooling, which can provide all the cooling capacity required by the battery compartment on the water supply side. There is no need for compressor 1 to provide refrigerant cooling, which can further reduce the energy consumption of the unit and achieve the purpose of energy saving and electricity saving.

[0058] like Figure 5 As shown, when the detected return water temperature Ti is within the required water supply temperature range, that is, the return water at this time can meet the cooling demand of the battery compartment on the water supply side, the self-circulation control module is controlled to operate and enter the self-circulation working mode.

[0059] In this working mode, the compressor 1 and the cooling fan 5 are controlled to stop, the first electronic three-way valve 17 and the second electronic three-way valve 15 are controlled to be all turned off, and the electronic two-way valve 19 is controlled to be turned on, so that the return water directly flows into the water supply pipe 7 through the bypass branch 18 and then flows back to the battery cabin on the water supply side to cool the battery. In this process, the return water no longer passes through the natural air cooling refrigeration circuit and the refrigerant refrigeration circuit, and is all sent out by the bypass branch 18, so that the water flow resistance in this working mode can be maximally reduced, and the rotating speed of the water pump 13 can be maximally reduced, thereby saving energy and electricity.

[0060] As shown in Figure 5 When the detected return water temperature Ti is lower than the required water supply temperature range, the low-temperature heating control module is controlled to act, and the low-temperature heating mode is entered.

[0061] In this working mode, the compressor 1 and the cooling fan 5 are controlled to stop, the first electronic three-way valve 17 and the second electronic three-way valve 15 are controlled to be all turned off, and the electronic two-way valve 19 is controlled to be turned on, so that the return water directly flows into the water supply pipe 7 through the bypass branch 18 and then flows back to the battery cabin on the water supply side to cool the battery. In this process, the return water no longer passes through the natural air cooling refrigeration circuit and the refrigerant refrigeration circuit, and is all sent out by the bypass branch 18, so that the water flow resistance in this working mode can be maximally reduced, and the rotating speed of the water pump 13 can be maximally reduced, thereby saving energy and electricity.

[0062] By adopting the above technical scheme, the following beneficial effects are achieved:

[0063] 1. The water chiller connects the refrigerant refrigeration and the natural air cooling in series. When the ambient temperature is lower than the return water temperature, the natural air cooling can be used, and when the natural air cooling provides insufficient cooling capacity, the refrigerant refrigeration can be used to supplement the cooling capacity. When the ambient temperature is low enough, the cooling capacity required by the water chiller can be provided by the natural air cooling. The water chiller maximally uses the natural air cooling, and achieves the purpose of reducing the energy consumption of the unit.

[0064] 2. The water chiller is provided with a bypass branch between the return water pipe and the water supply pipe. The bypass branch can be used to adjust the water supply temperature, and when the return water does not need refrigeration to meet the cooling capacity demand, the return water no longer passes through the natural air cooling refrigeration circuit and the refrigerant refrigeration circuit, and is all sent out by the bypass branch. By providing the bypass branch, the water flow resistance can be maximally reduced, and the rotating speed of the water pump can be maximally reduced, thereby further achieving the purpose of saving energy and electricity.

[0065] The above merely describes preferred embodiments of the present application and is not intended to limit the present application in any form, although the present application has been disclosed as above with preferred embodiments, however, it is not intended to limit the present application, any person skilled in the art without departing from the technical scheme of the present application can make some changes or modifications to the above-mentioned technical content for equivalent embodiments, the implementation schemes in the above-mentioned embodiments can be further combined or replaced, as long as it does not deviate from the content of the technical scheme of the present application, any simple modification, equivalent change and modification made to the above-mentioned embodiments according to the technical essence of the present application still belongs to the scope of the present application.

Claims

1. A dual-cold-source energy-storage water chiller, characterized in that: The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe.

2. The dual cold source energy storage water chiller according to claim 1, characterized in that: The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe.

3. The dual cold source energy storage water chiller according to claim 1, characterized in that: The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe.

4. The dual cold source energy storage water chiller according to claim 3, characterized in that: The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe.

5. The dual cold source energy storage water chiller according to claim 3, characterized in that: The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe.

6. The dual cold source energy storage water chiller according to claim 3, characterized in that: The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe.

7. The dual cold source energy storage water chiller of claim 1, wherein: The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe.

8. The dual cold source energy storage water chiller of claim 1, wherein: The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe.

9. The dual cold source energy storage water chiller of claim 1, wherein: The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe.

10. A dual cold source energy storage water chiller according to any of claims 1-9, characterized in that: The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three-way valve, and the second electronic three-way valve is connected in series on the water return pipe. The natural air cooling circuit is connected with the inlet end of the water flow channel of the plate heat exchanger through a second electronic three

Images