Cold supply system

Abstract

The utility model discloses a cold supply system which comprises an air cooling screw type water chilling unit, the water outlet end of the air cooling screw type water chilling unit is connected with the water inlet end of a water segregator through a cold supply water inlet main pipe, and the water inlet end of the air cooling screw type water chilling unit is connected with the water outlet end of a water collector through a cold supply water return main pipe; the plurality of fan coils are connected between the water segregator and the water collector; the plate heat exchanger is connected with the cold supply water inlet main pipe and the cold supply water return main pipe; and the cold storage water tank is connected with the plate heat exchanger and forms a water loop. According to the scheme of the utility model, the air-cooled screw-type water chilling unit utilizes off-peak electricity to refrigerate at night and is matched with the plate heat exchanger and the cold storage water tank to store cold, and cold water in the cold storage water tank exchanges heat with the plate heat exchanger to supply cold water to the water segregator and supply cold through the fan coil in the daytime, so that the heat exchange efficiency is improved. The electricity consumption of the air-cooled screw type water chilling unit in the daytime can be reduced, and the operation cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cold supply technical field, specifically relates to a cold supply system. BACKGROUND

[0002] At present, the cold supply mainly utilizes the air-cooled screw type water chiller to carry out refrigeration to water medium, and under the action of circulating pump, the cold water is injected into the water distributor to realize the heat exchange through the fan coil to achieve the cold supply to the indoor, but the present cold supply system is mainly used for the cold supply in the daytime, the air-cooled screw type water chiller uses peak electricity in the daytime, and the electricity price is high, and the present cold supply system cannot fully utilize the valley electricity in the night, and the overall operation cost is high. UTILITY MODEL CONTENTS

[0003] The utility model provides a cold supply system, and the air-cooled screw type water chiller utilizes valley electricity to carry out refrigeration during the night, is matched with the plate heat exchanger and the cold storage water tank to carry out cold storage, during the day, the cold water in the cold storage water tank and the plate heat exchanger are used to carry out heat exchange, the cold water is supplied to the water distributor, and the cold supply is carried out through the fan coil, can reduce the electricity consumption of the air-cooled screw type water chiller during the day, and reduce the operation cost.

[0004] To solve the above technical problem, the technical scheme of the utility model is as follows:

[0005] The utility model provides a cold supply system, and the air-cooled screw type water chiller utilizes valley electricity to carry out refrigeration during the night, is matched with the plate heat exchanger and the cold storage water tank to carry out cold storage, during the day, the cold water in the cold storage water tank and the plate heat exchanger are used to carry out heat exchange, the cold water is supplied to the water distributor, and the cold supply is carried out through the fan coil, can reduce the electricity consumption of the air-cooled screw type water chiller during the day, and reduce the operation cost.

[0006] The air-cooled screw type water chiller is connected with the water distributor and the water collector through the cold supply water inlet main pipe and the cold supply water return main pipe.

[0007] A plurality of fan coils are connected with the water distributor and the water collector through the water inlet end and the water outlet end.

[0008] The first valve group is arranged on the cold supply water inlet main pipe.

[0009] The cold supply circulating pump is arranged on the cold supply water return main pipe.

[0010] The first cold supply water inlet branch pipe is connected with the first external heat exchange water pipe of the plate heat exchanger at one end, and the other end is connected with the cold supply water inlet main pipe, and the connection position of the first cold supply water inlet branch pipe and the cold supply water inlet main pipe is located between the first valve group and the water outlet end of the air-cooled screw type water chiller.

[0011] The second valve group is arranged on the first cold supply water inlet branch pipe.

[0012] A first cold water return branch pipe, one end of the first cold water return branch pipe is connected with the second external heat exchange water pipe of the plate heat exchanger, the other end of the first cold water return branch pipe is connected with the cold water return main pipe, and the connection position of the first cold water return branch pipe and the cold water return main pipe is between the water distributor and the cold cycle pump;

[0013] A third valve group arranged on the first cold water return branch pipe;

[0014] A second cold water return branch pipe, one end of the second cold water return branch pipe is connected with the first external heat exchange water pipe of the plate heat exchanger, the other end of the second cold water return branch pipe is connected with the cold water return main pipe, and the connection position of the second cold water return branch pipe and the cold water return main pipe is between the water inlet end of the air-cooled screw water chiller and the cold cycle pump;

[0015] A fifth valve group arranged on the second cold water return branch pipe;

[0016] A second cold water inlet branch pipe, one end of the second cold water inlet branch pipe is connected with the second external heat exchange water pipe of the plate heat exchanger, the other end of the second cold water inlet branch pipe is connected with the cold water inlet main pipe, and the connection position of the second cold water inlet branch pipe and the cold water inlet main pipe is between the first valve group and the water distributor;

[0017] A fourth valve group arranged on the second cold water inlet branch pipe;

[0018] A cold storage cycle pump, the water outlet end of the cold storage cycle pump is connected with the second cold storage heat exchange water pipe of the plate heat exchanger;

[0019] A first cold storage branch water pipe, one end of the first cold storage branch water pipe is connected with the water inlet end of the cold storage cycle pump, and the other end of the first cold storage branch water pipe is connected with the second cold storage main water pipe of the cold storage water tank;

[0020] A second cold storage branch water pipe, one end of the second cold storage branch water pipe is connected with the first cold storage heat exchange water pipe of the plate heat exchanger, and the other end of the second cold storage branch water pipe is connected with the first cold storage main water pipe of the cold storage water tank;

[0021] A cold storage valve group arranged on the first cold storage branch water pipe and the second cold storage branch water pipe;

[0022] A first energy release branch water pipe, one end of the first energy release branch water pipe is connected with the water inlet end of the cold storage cycle pump, and the other end of the first energy release branch water pipe is connected with the first cold storage main water pipe of the cold storage water tank;

[0023] A second energy releasing branch water pipe, one end of the second energy releasing branch water pipe is connected with the first cold accumulation heat exchange water pipe of the plate heat exchanger, and the other end of the second energy releasing branch water pipe is connected with the second cold accumulation main water pipe of the cold accumulation water tank;

[0024] An energy releasing valve group arranged on the first energy releasing branch water pipe and the second energy releasing branch water pipe.

[0025] Optionally, the cooling supply system further comprises:

[0026] A photovoltaic power generation system, the air-cooled screw type chiller is electrically connected with the photovoltaic power generation system, and the photovoltaic power generation system is parallelly connected with commercial power for power supply;

[0027] A controller, the photovoltaic power generation system and the air-cooled screw type chiller are electrically connected with the controller.

[0028] Optionally, the first valve group and the fifth valve group each comprise:

[0029] A first electromagnetic valve, the first electromagnetic valve is electrically connected with the controller;

[0030] Two first manual valves, the two first manual valves are respectively connected at two ends of the first electromagnetic valve;

[0031] A second manual valve, the second manual valve is parallelly connected with the two first manual valves and the first electromagnetic valve.

[0032] Optionally, the second valve group, the third valve group and the fourth valve group each comprise:

[0033] A second electromagnetic valve, the second electromagnetic valve is electrically connected with the controller;

[0034] A third manual valve, the third manual valve is serially connected with the second electromagnetic valve.

[0035] Optionally, the cold accumulation valve group comprises:

[0036] A first cold accumulation electromagnetic valve, the first cold accumulation electromagnetic valve is arranged on the first cold accumulation branch water pipe;

[0037] A second cold accumulation electromagnetic valve, the second cold accumulation electromagnetic valve is arranged on the second cold accumulation branch water pipe;

[0038] The first cold accumulation electromagnetic valve and the second cold accumulation electromagnetic valve are electrically connected with the controller.

[0039] Optionally, the energy releasing valve group comprises:

[0040] A first cooling supply electromagnetic valve, the first cooling supply electromagnetic valve is arranged on the first energy releasing branch water pipe;

[0041] A second cold supply electromagnetic valve is arranged on the second energy releasing branch water pipe.

[0042] The first cold supply electromagnetic valve and the second cold supply electromagnetic valve are electrically connected with the controller.

[0043] Optionally, the cold supply circulating pump is provided with three groups, and the three groups of cold supply circulating pumps are connected in parallel, and the cold supply circulating pump is electrically connected with the controller.

[0044] Optionally, the cold storage circulating pump is provided with two groups, and the two groups of cold storage circulating pumps are connected in parallel, and the cold storage circulating pump is electrically connected with the controller.

[0045] Optionally, the cold supply system further comprises:

[0046] A first temperature sensor is arranged on the first cold storage heat exchange water pipe.

[0047] A second temperature sensor is arranged on the second cold storage heat exchange water pipe.

[0048] The first temperature sensor and the second temperature sensor are electrically connected with the controller.

[0049] Optionally, the cold supply system further comprises:

[0050] A softened water tank, and a water outlet end of the softened water tank is connected with a water collector through a water supplement pipe.

[0051] A water supplement pump arranged on the water supplement pipe, and the water supplement pump is electrically connected with the controller.

[0052] A constant pressure tank, and an outlet end of the constant pressure tank is connected with the water supplement pipe, and the connection position of the constant pressure tank and the water supplement pipe is located between the water supplement pump and the water collector.

[0053] A water softener, and a water outlet end of the water softener is connected with a water inlet end of the softened water tank through a flow guide pipe, and the water inlet end of the water softener is connected with a water source through a water supplement water inlet pipe.

[0054] A water supplement electromagnetic valve arranged on the water supplement water inlet pipe, and the water supplement electromagnetic valve is electrically connected with the controller.

[0055] A liquid level sensor arranged in the softened water tank, and the liquid level sensor is electrically connected with the controller.

[0056] The above scheme of the utility model at least has the following beneficial effects:

[0057] The above scheme of the utility model, during the night period, the air-cooled screw type water chiller utilizes valley electricity to carry out refrigeration, cooperates with the plate heat exchanger and the cold storage water tank to carry out cold storage, during the day, through the cold water inside the cold storage water tank and the plate heat exchanger to carry out heat exchange, supplies cold water to the water distributor, carries out cooling through the fan coil, can reduce the power consumption of the air-cooled screw type water chiller during the day, reduces the operation cost. BRIEF DESCRIPTION OF DRAWINGS

[0058] Figure 1 It is the structural schematic diagram of the cooling system provided by the embodiment of the utility model.

[0059] The sign explanation is as follows:

[0060] 1, air-cooled screw type water chiller;11, cooling water supply main pipe;12, cooling return water main pipe;13, first cooling water supply branch pipe;14, second cooling return water branch pipe;15, first cooling return water branch pipe;16, second cooling water supply branch pipe;2, cooling circulating pump;3, plate heat exchanger;31, first cold storage heat exchange water pipe;32, second cold storage heat exchange water pipe;33, first external heat exchange water pipe;34, second external heat exchange water pipe;35, first temperature sensor;36, second temperature sensor;4, cold storage circulating pump;5, cold storage water tank;51, first cold storage main water pipe;52, second cold storage main water pipe;53, second energy release branch water pipe;54, second cold storage branch water pipe;55, first energy release branch water pipe;56, first cold storage branch water pipe;61, first valve group;62, second valve group;63, third valve group;64, fourth valve group;65, fifth valve group;66, second cooling electromagnetic valve;67, first cooling electromagnetic valve;68, second cold storage electromagnetic valve;69, first cold storage electromagnetic valve;71, water distributor;72, water collector;81, softening water tank;82, water replenishing pump;83, constant pressure tank;84, water replenishing pipe;85, liquid level sensor;86, water softener;87, flow guide pipe;88, water replenishing water inlet pipe;89, water replenishing electromagnetic valve. DETAILED DESCRIPTION

[0061] Exemplary embodiments of the present disclosure will be described below in greater detail with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be accurately conveyed to those skilled in the art.

[0062] As Figure 1 shown, the utility model provides a kind of cooling system, comprising:

[0063] The air-cooled screw water chiller 1 is connected with the water inlet end of the distributor 71 through the cooling water supply main pipe 11, and the water outlet end of the air-cooled screw water chiller 1 is connected with the water collecting device 72 through the cooling water return main pipe 12;

[0064] The plurality of fan-coil units are connected with the water outlet end of the distributor 71 through the water inlet end, and the water inlet end of the plurality of fan-coil units is connected with the water collecting device 72 through the water outlet end;

[0065] The first valve group 61 is arranged on the cooling water supply main pipe 11;

[0066] The cooling circulating pump 2 is arranged on the cooling water return main pipe 12;

[0067] The first cooling water supply branch pipe 13 is connected with the first external heat exchange water pipe 33 of the plate heat exchanger 3 at one end, and connected with the cooling water supply main pipe 11 at the other end, and the connection position between the first cooling water supply branch pipe 13 and the cooling water supply main pipe 11 is located between the first valve group 61 and the water outlet end of the air-cooled screw water chiller 1;

[0068] The second valve group 62 is arranged on the first cooling water supply branch pipe 13;

[0069] The first cooling water return branch pipe 15 is connected with the second external heat exchange water pipe 34 of the plate heat exchanger 3 at one end, and connected with the cooling water return main pipe 12 at the other end, and the connection position between the first cooling water return branch pipe 15 and the cooling water return main pipe 12 is located between the distributor 71 and the cooling circulating pump 2;

[0070] The third valve group 63 is arranged on the first cooling water return branch pipe 15;

[0071] The second cooling water return branch pipe 14 is connected with the first external heat exchange water pipe 33 of the plate heat exchanger 3 at one end, and connected with the cooling water return main pipe 12 at the other end, and the connection position between the second cooling water return branch pipe 14 and the cooling water return main pipe 12 is located between the water inlet end of the air-cooled screw water chiller 1 and the cooling circulating pump 2;

[0072] The fifth valve group 65 is arranged on the second cooling water return branch pipe 14;

[0073] The second cooling water supply branch pipe 16 is connected with the second external heat exchange water pipe 34 of the plate heat exchanger 3 at one end, and connected with the cooling water supply main pipe 11 at the other end, and the connection position between the second cooling water supply branch pipe 16 and the cooling water supply main pipe 11 is located between the first valve group 61 and the distributor 71;

[0074] A fourth valve group 64 is arranged on the second cold water supply branch pipe 16.

[0075] A cold storage circulating pump 4, whose water outlet is connected with the second cold storage heat exchange water pipe 32 of the plate heat exchanger 3;

[0076] A first cold storage branch water pipe 56, one end of which is connected with the water inlet of the cold storage circulating pump 4, and the other end of which is connected with the second cold storage main water pipe 52 of the cold storage water tank 5;

[0077] A second cold storage branch water pipe 54, one end of which is connected with the first cold storage heat exchange water pipe 31 of the plate heat exchanger 3, and the other end of which is connected with the first cold storage main water pipe 51 of the cold storage water tank 5;

[0078] A cold storage valve group arranged on the first cold storage branch water pipe 56 and the second cold storage branch water pipe 54;

[0079] A first energy release branch water pipe 55, one end of which is connected with the water inlet of the cold storage circulating pump 4, and the other end of which is connected with the first cold storage main water pipe 51 of the cold storage water tank 5;

[0080] A second energy release branch water pipe 53, one end of which is connected with the first cold storage heat exchange water pipe 31 of the plate heat exchanger 3, and the other end of which is connected with the second cold storage main water pipe 52 of the cold storage water tank 5;

[0081] An energy release valve group arranged on the first energy release branch water pipe 55 and the second energy release branch water pipe 53.

[0082] During the night, the second valve group 62, the third valve group 63 and the cold storage valve group are opened, the first valve group 61, the fourth valve group 64, the fifth valve group 65 and the energy release valve group are closed, the air-cooled screw water chiller 1, the cooling circulating pump 2 and the cold storage circulating pump 4 are started, under the action of the cooling circulating pump 2, the cold water prepared by the air-cooled screw water chiller 1 enters the plate heat exchanger 3 through the cooling water inlet main pipe 11, the first cooling water inlet branch pipe 13, exchanges heat in the plate heat exchanger 3, and the water after heat exchange reenters the air-cooled screw water chiller 1 through the second external heat exchange water pipe 34, the first cooling water return branch pipe 15 and the cooling water return main pipe 12, under the action of the cold storage circulating pump 4, the water in the cold storage water tank 5 enters the plate heat exchanger 3 through the second cold storage main water pipe 52, the first cold storage branch water pipe 56 and the second cold storage heat exchange water pipe 32, exchanges heat in the plate heat exchanger 3, and the water after heat exchange enters the cold storage water tank 5 through the first cold storage heat exchange water pipe 31, the second cold storage branch water pipe 54 and the first cold storage main water pipe 51, exchanges heat by the plate heat exchanger 3, stores the refrigerating capacity of the air-cooled screw water chiller 1 in the cold storage water tank 5, so that the valley electricity at night is used for cold storage;

[0083] During the day, the cold storage water tank 5 is used for cooling alone: the fifth valve group 65, the fourth valve group 64 and the energy release valve group are opened, the first valve group 61, the second valve group 62, the third valve group 63 and the cold storage valve group are closed, the air-cooled screw water chiller 1 is closed, the cooling circulating pump 2 and the cold storage circulating pump 4 are started, under the action of the cold storage circulating pump 4, the cold water in the cold storage water tank 5 enters the plate heat exchanger 3 through the first cold storage main water pipe 51, the first energy release branch water pipe 55 and the second cold storage heat exchange water pipe 32, exchanges heat in the plate heat exchanger 3, the water after heat exchange reenters the cold storage water tank 5 through the first cold storage heat exchange water pipe 31, the second energy release branch water pipe 53 and the second cold storage main water pipe 52, releases the cold storage capacity, under the action of the cooling circulating pump 2, the water in the water collector 72 enters the plate heat exchanger 3 through the cooling water return main pipe 12, the second cooling water return branch pipe 14 and the first external heat exchange water pipe 33, exchanges heat in the plate heat exchanger 3, exchanges the cold storage capacity, the cold water enters the water distributor 71 through the second external heat exchange water pipe 34, the second cooling water inlet branch pipe 16 and the cooling water inlet main pipe 11, and enters the multiple fan coils, exchanges heat in the fan coils to realize cooling of the indoor; the cold storage capacity of the cold storage water tank 5 at night is used for cooling alone;

[0084] The cold water tank 5 and the air-cooled screw water chiller 1 jointly supply cold: the first valve group 61, the fourth valve group 64, the fifth valve group 65 and the energy releasing valve group are opened, the second valve group 62, the third valve group 63 and the energy storage valve group are closed, and the air-cooled screw water chiller 1, the cold water supply circulating pump 2 and the cold water storage circulating pump 4 are opened; under the action of the cold water supply circulating pump 2, part of the water in the water collector 72 enters the air-cooled screw water chiller 1 through the cold water supply return main pipe 12, the cold water prepared by the air-cooled screw water chiller 1 enters the water distributor 71 through the cold water supply inlet main pipe 11, and enters a plurality of fan coils, heat exchange is carried out through the fan coils to realize cold supply to the indoor; under the action of the cold water storage circulating pump 4, the cold water in the cold water tank 5 enters the plate heat exchanger 3 inside to carry out heat exchange through the first cold water storage main water pipe 51, the first energy releasing branch water pipe 55 and the second cold water storage heat exchange water pipe 32, the water after heat exchange reenters the cold water tank 5 inside through the first cold water storage heat exchange water pipe 31, the second energy releasing branch water pipe 53 and the second cold water storage main water pipe 52 to release the cold storage capacity, under the action of the cold water supply circulating pump 2, part of the water in the water collector 72 enters the plate heat exchanger 3 through the cold water supply return main pipe 12 and the second cold water supply return branch pipe 14 to exchange the cold storage capacity, the cold water enters the water distributor 71 through the second external heat exchange water pipe 34, the second cold water supply inlet branch pipe 16 and the cold water supply inlet main pipe 11, and enters a plurality of fan coils, heat exchange is carried out through the fan coils to realize cold supply to the indoor; the cold is supplied through the cold water tank 5 and the air-cooled screw water chiller 1.

[0085] When the cold storage capacity of the cold water tank 5 is released, the first valve group 61 is opened, the second valve group 62, the third valve group 63, the fourth valve group 64, the fifth valve group 65, the cold storage valve group and the energy releasing valve group are closed, the cold water supply circulating pump 2 and the air-cooled screw water chiller 1 are opened, the cold water prepared by the air-cooled screw water chiller 1 enters the water distributor 71 through the cold water supply inlet main pipe 11, and enters a plurality of fan coils, heat exchange is carried out through the fan coils to realize cold supply to the indoor, the water releasing energy in the plurality of fan coils reenters the air-cooled screw water chiller 1 through the water collector 72 and the cold water supply return main pipe 12, and the air-cooled screw water chiller 1 is used for single cold supply;

[0086] Through the air-cooled screw water chiller 1 using valley electricity to carry out refrigeration during the night, the plate heat exchanger 3 and the cold water tank 5 are used for cold storage, during the day, the cold water in the cold water tank 5 and the plate heat exchanger 3 are used for heat exchange, the water distributor 71 is supplied with cold water, and the fan coil is used for cold supply, so that the power consumption of the air-cooled screw water chiller 1 during the day can be reduced, and the operation cost can be reduced.

[0087] In an optional embodiment of the utility model, the cold supply system further includes:

[0088] The photovoltaic power generation system is electrically connected with the air-cooled screw chiller 1, and the photovoltaic power generation system is parallelly connected with the commercial power supply for power supply;

[0089] The controller, the photovoltaic power generation system and the air-cooled screw chiller 1 are electrically connected with the controller.

[0090] In this embodiment, the parallel connection of the photovoltaic power generation system and the commercial power supply for power supply can adopt an existing connection mode, and the switching between the photovoltaic power generation system and the commercial power supply for power supply is realized, which will not be described herein again. The photovoltaic power generation system can include a photovoltaic panel, a grid-connected inverter and a bidirectional electric meter. The grid-connected inverter is in communication connection with the controller. The above connection mode is to enable the controller to obtain the power supply amount of the photovoltaic power generation system. When the power generation amount of the photovoltaic power generation system is greater than the actual load consumption amount, there is excess power generation amount. At this time, the photovoltaic power generation system is switched to supply power to the air-cooled screw chiller 1. In specific application, other existing connection modes can also be adopted to enable the controller to detect whether the photovoltaic power generation system has excess power amount.

[0091] During the night, the air-cooled screw chiller 1 is supplied with power by the commercial power supply, and the valley electricity is used for cold storage. During the day, if the photovoltaic power generation system has excess power amount, the air-cooled screw chiller 1 is supplied with power by the photovoltaic power generation system, the air-cooled screw chiller 1 is used for cooling supply, and the heat storage water tank is used for cold storage at the same time. The second valve group 62, the fourth valve group 64 and the cold storage valve group are opened, the first valve group 61, the third valve group 63, the fifth valve group 65 and the energy release valve group are closed, the air-cooled screw chiller 1, the cooling supply circulating pump 2 and the cold storage circulating pump 4 are started, under the action of the cooling supply circulating pump 2, the water in the water collector 72 enters the air-cooled screw chiller 1 through the cooling supply water main pipe 12, the cold water prepared by the air-cooled screw chiller 1 enters the plate heat exchanger 3 through the cooling water inlet main pipe 11, the first cooling water inlet branch pipe 13 and the first external heat exchange water pipe 33, the water in the plate heat exchanger 3 enters the water distributor 71 through the second external heat exchange water pipe 34, the second cooling water inlet branch pipe 16 and the cooling water inlet main pipe 11, and enters a plurality of fan coil units, heat exchange is carried out in the fan coil units to realize cooling supply to the indoor; at the same time, under the action of the cold storage circulating pump 4, the water in the cold storage water tank 5 enters the plate heat exchanger 3 through the second cold storage main water pipe 52, the first cold storage branch water pipe 56 and the second cold storage heat exchange water pipe 32, heat exchange is carried out in the plate heat exchanger 3, the heat exchanged water enters the cold storage water tank 5 through the first cold storage heat exchange water pipe 31, the second cold storage branch water pipe 54 and the first cold storage main water pipe 51, heat exchange is carried out in the plate heat exchanger 3, and the refrigerating capacity of the air-cooled screw chiller 1 is stored in the cold storage water tank 5; the excess power amount of the solar power supply system is used for cooling supply and cold storage at the same time during the day, and the operation cost is further reduced;

[0092] In the embodiment, the controller can be an LUNA2000 series intelligent energy storage controller, and the controller can also be a controller of other models capable of realizing the above functions.

[0093] In an optional embodiment of the utility model, the first valve group 61 and the fifth valve group 65 both include:

[0094] The first electromagnetic valve is electrically connected with the controller;

[0095] The two first manual valves are respectively connected at two ends of the first electromagnetic valve;

[0096] The second manual valve is connected in parallel with the two first manual valves and the first electromagnetic valve.

[0097] In the embodiment, during normal operation, the two first manual valves are in a fully open state, and the second manual valve is in a closed state; through the electrical connection between the first electromagnetic valve and the controller, the opening and closing of the first electromagnetic valve can be controlled by the controller, so that the remote control opening and closing of the first valve group 61 and the second valve group 62 are realized, and the system operation convenience is improved;

[0098] When the first electromagnetic valve needs to be maintained, the two first manual valves are closed, and the opening and closing of the first valve group 61 or the second valve group 62 are realized by opening and closing the second manual valve, so that the system can operate normally.

[0099] In an optional embodiment of the utility model, the second valve group 62, the third valve group 63 and the fourth valve group 64 all include:

[0100] The second electromagnetic valve is electrically connected with the controller;

[0101] The third manual valve is connected in series with the second electromagnetic valve.

[0102] In the embodiment, during normal operation, the third manual valve is in a fully open state, and through the electrical connection between the second electromagnetic valve and the controller, the opening and closing of the second electromagnetic valve can be controlled by the controller, so that the remote control opening and closing of the second valve group 62, the third valve group 63 and the fourth valve group 64 are realized, and the system operation convenience is improved;

[0103] When the second electromagnetic valve needs to be maintained, the third manual valve is closed, so that the second electromagnetic valve can be maintained.

[0104] In an optional embodiment of the utility model, the cold storage valve group includes:

[0105] The first cold storage electromagnetic valve 69 is arranged on the first cold storage branch water pipe 56;

[0106] The second cold accumulation electromagnetic valve 68 is arranged on the second cold accumulation branch water pipe 54.

[0107] The first cold accumulation electromagnetic valve 69 and the second cold accumulation electromagnetic valve 68 are electrically connected with the controller.

[0108] In this embodiment, the first cold accumulation electromagnetic valve 69 and the second cold accumulation electromagnetic valve 68 are electrically connected with the controller, so that the opening and closing of the first cold accumulation electromagnetic valve 69 and the second cold accumulation electromagnetic valve 68 can be controlled, the remote control of the cold accumulation valve group is realized, and the opening and closing of the first cold accumulation branch water pipe 56 and the second cold accumulation branch water pipe 54 are realized, thereby improving the convenience of system operation.

[0109] In an optional embodiment of the utility model, the energy releasing valve group comprises:

[0110] The first cold supply electromagnetic valve 67 is arranged on the first energy releasing branch water pipe 55.

[0111] The second cold supply electromagnetic valve 66 is arranged on the second energy releasing branch water pipe 53.

[0112] The first cold supply electromagnetic valve 67 and the second cold supply electromagnetic valve 66 are electrically connected with the controller.

[0113] In this embodiment, the first cold supply electromagnetic valve 67 and the second cold supply electromagnetic valve 66 are electrically connected with the controller, so that the opening and closing of the first cold supply electromagnetic valve 67 and the second cold supply electromagnetic valve 66 can be controlled by the controller, the remote control of the energy releasing valve group is realized, and the opening and closing of the first energy releasing branch water pipe 55 and the second energy releasing branch water pipe 53 are realized, thereby improving the convenience of system operation.

[0114] In an optional embodiment of the utility model, the cold supply circulating pump 2 is provided with three groups, and the three groups of cold supply circulating pumps 2 are connected in parallel, and the cold supply circulating pump 2 is electrically connected with the controller.

[0115] In this embodiment, the opening and closing of the cold supply circulating pump 2 can be remotely controlled by the controller, thereby improving the convenience of system operation.

[0116] The cold supply circulating pump 2 is provided with three groups, and two groups of cold supply circulating pumps 2 are commonly opened during normal use, and the other group of cold supply circulating pumps 2 is used as a backup, so as to ensure the normal operation of the system.

[0117] In an optional embodiment of the utility model, the cold accumulation circulating pump 4 is provided with two groups, and the two groups of cold accumulation circulating pumps 4 are connected in parallel, and the cold accumulation circulating pump 4 is electrically connected with the controller.

[0118] In this embodiment, the opening and closing of the cold accumulation circulating pump 4 can be remotely controlled by the controller, thereby improving the convenience of system operation.

[0119] The cold storage circulating pumps 4 are provided in two groups, one group of the cold storage circulating pumps 4 is in operation, and the other group of the cold storage circulating pumps 4 is in standby, so that the system can be ensured to operate normally.

[0120] In an optional embodiment of the utility model, the cold supply system further comprises:

[0121] The first temperature sensor 35 is arranged on the first cold storage heat exchange water pipe 31.

[0122] The second temperature sensor 36 is arranged on the second cold storage heat exchange water pipe 32.

[0123] The first temperature sensor 35 and the second temperature sensor 36 are electrically connected with the controller.

[0124] In the embodiment, the first temperature sensor 35 and the second temperature sensor 36 detect the outlet water temperature and the inlet water temperature of the cold storage water tank 5 respectively, and transmit the temperature detection signals to the controller, so as to determine the cold storage capacity in the cold storage water tank 5 in cooperation with the preset temperature value; specifically, when the outlet water temperature and the inlet water temperature of the cold storage water tank 5 detected by the first temperature sensor 35 and the second temperature sensor 36 are both less than the first preset temperature value during the cold storage of the cold storage water tank 5, it is indicated that the cold storage of the cold storage water tank 5 is completed, and the cold storage is stopped, wherein the first preset temperature value can be 8.5 DEG C; when the outlet water temperature and the inlet water temperature of the cold storage water tank 5 detected by the first temperature sensor 35 and the second temperature sensor 36 are both greater than the second preset temperature value during the energy release of the cold storage water tank 5, it is indicated that the cold storage capacity of the cold storage water tank 5 is completely released, and the energy release state of the cold storage water tank 5 is exited, wherein the second preset temperature value can be 12 DEG C.

[0125] In an optional embodiment of the utility model, the cold supply system further comprises:

[0126] The softened water tank 81 is connected with the water collector 72 through the water supplement pipe 84 at the outlet end;

[0127] The water supplement pump 82 is arranged on the water supplement pipe 84 and is electrically connected with the controller;

[0128] The constant pressure tank 83 is connected with the water supplement pipe 84 at the outlet end, and the connection position between the constant pressure tank 83 and the water supplement pipe 84 is located between the water supplement pump 82 and the water collector 72;

[0129] The water softener 86 is connected with the softened water tank 81 through the flow guide pipe 87 at the outlet end, and is connected with the water source through the water supplement inlet pipe 88 at the inlet end;

[0130] A water replenishment electromagnetic valve 89 is arranged on the water replenishment inlet pipe 88, and the water replenishment electromagnetic valve 89 is electrically connected with the controller.

[0131] A liquid level sensor 85 is arranged inside the softened water tank 81, and the liquid level sensor 85 is electrically connected with the controller.

[0132] In this embodiment, in order to ensure the safety of the whole system, in winter and the like, the heavy water of the cooling supply system needs to be completely discharged; when cooling supply is needed, the system needs to be replenished with water. Specifically, water from a water source is introduced into the water softener 86 through the water replenishment inlet pipe 88, the water is softened by the water softener 86, the softened water is introduced into the softened water tank 81 through the flow guide pipe 87, the liquid level in the softened water tank 81 is detected by the liquid level sensor 85, and the liquid level signal is transmitted to the controller. When the liquid level in the softened water tank 81 reaches a preset liquid level value, the controller controls the water replenishment electromagnetic valve 89 to be closed, and the injection of the softened water into the softened water tank 81 is stopped. The controller controls the water replenishment pump 82 to be opened, and the softened water in the softened water tank 81 is replenished into the water collector 72 through the water replenishment pipe 84 under the action of the water replenishment pump 82, so as to replenish water into the whole system. When the water is replenished, the pressure in the whole system is ensured by the pressure maintaining tank 83.

[0133] The water replenishment pump 82 is provided with two groups, one group is in normal operation, and the other group is in standby.

[0134] Cooling system working process:

[0135] In the early stage of cooling, water from a water source is introduced into the water softener 86 through the water replenishment inlet pipe 88, the water is softened by the water softener 86, the softened water is introduced into the softened water tank 81 through the flow guide pipe 87, the liquid level in the softened water tank 81 is detected by the liquid level sensor 85, and the liquid level signal is transmitted to the controller. When the liquid level in the softened water tank 81 reaches a preset liquid level value, the controller controls the water replenishment electromagnetic valve 89 to be closed, and the injection of the softened water into the softened water tank 81 is stopped. The controller controls the water replenishment pump 82 to be opened, and the softened water in the softened water tank 81 is replenished into the water collector 72 through the water replenishment pipe 84 under the action of the water replenishment pump 82, so as to replenish water into the whole system. When the water is replenished, the pressure in the whole system is ensured by the pressure maintaining tank 83.

[0136] At night, the valley electricity is used for cold storage, the second valve group 62, the third valve group 63 and the cold storage valve group are opened, the first valve group 61, the fourth valve group 64, the fifth valve group 65 and the energy release valve group are closed, the air-cooled screw chiller 1, the cooling circulating pump 2 and the cold storage circulating pump 4 are started, under the action of the cooling circulating pump 2, the cold water prepared by the air-cooled screw chiller 1 enters the inside of the plate heat exchanger 3 through the cooling water inlet main pipe 11, the first cooling water inlet branch pipe 13 for heat exchange, and the water after heat exchange reenters the air-cooled screw chiller 1 through the second external heat exchange water pipe 34, the first cooling water return branch pipe 15 and the cooling water return main pipe 12, under the action of the cold storage circulating pump 4, the water in the cold storage tank 5 enters the inside of the plate heat exchanger 3 through the second cold storage main water pipe 52, the first cold storage branch water pipe 56 and the second cold storage heat exchange water pipe 32 for heat exchange, and the water after heat exchange enters the cold storage tank 5 through the first cold storage heat exchange water pipe 31, the second cold storage branch water pipe 54 and the first cold storage main water pipe 51, the plate heat exchanger 3 is used for heat exchange, the refrigerating capacity of the air-cooled screw chiller 1 is stored in the cold storage tank 5, so that the valley electricity at night is used for cold storage, when the outlet water temperature and the inlet water temperature of the cold storage tank 5 detected by the first temperature sensor 35 and the second temperature sensor 36 are less than the first preset temperature value, it is indicated that the cold storage tank 5 completes cold storage, and the cold storage is stopped;

[0137] During the peak electricity period in the daytime, the cold storage tank 5 is used for separate energy release and cooling, the fifth valve group 65, the fourth valve group 64 and the energy release valve group are opened, the first valve group 61, the second valve group 62, the third valve group 63 and the cold storage valve group are closed, the air-cooled screw chiller 1 is closed, the cooling circulating pump 2 and the cold storage circulating pump 4 are started, under the action of the cold storage circulating pump 4, the cold water in the cold storage tank 5 enters the inside of the plate heat exchanger 3 through the first cold storage main water pipe 51, the first energy release branch water pipe 55 and the second cold storage heat exchange water pipe 32 for heat exchange, the water after heat exchange reenters the inside of the cold storage tank 5 through the first cold storage heat exchange water pipe 31, the second energy release branch water pipe 53 and the second cold storage main water pipe 52 for cold storage capacity release, under the action of the cooling circulating pump 2, the water in the water collector 72 enters the inside of the plate heat exchanger 3 through the cooling water return main pipe 12, the second cooling water return branch pipe 14 and the first external heat exchange water pipe 33 for heat exchange, exchanges the cold storage capacity, the cold water enters the water distributor 71 through the second external heat exchange water pipe 34, the second cooling water inlet branch pipe 16 and the cooling water inlet main pipe 11, and enters a plurality of fan coils, exchanges heat through the fan coils to realize cooling of the indoor; the cold storage capacity of the cold storage tank 5 at night is used for separate cooling;

[0138] During the peak electricity period of the day, the cold water is supplied by the cold storage water tank 5 and the air-cooled screw water chiller 1 together: the first valve group 61, the fourth valve group 64, the fifth valve group 65 and the energy releasing valve group are opened, the second valve group 62, the third valve group 63 and the energy storage valve group are closed, and the air-cooled screw water chiller 1, the cooling circulating pump 2 and the cold storage circulating pump 4 are opened; under the action of the cooling circulating pump 2, part of the water in the water collector 72 enters the air-cooled screw water chiller 1 through the cooling water return main pipe 12, the cold water prepared by the air-cooled screw water chiller 1 enters the water distributor 71 through the cooling water inlet main pipe 11, and enters a plurality of fan coils, and the cooling is realized by heat exchange in the fan coils; under the action of the cold storage circulating pump 4, the cold water in the cold storage water tank 5 enters the plate heat exchanger 3 inside for heat exchange through the first cold storage main water pipe 51, the first energy releasing branch water pipe 55 and the second cold storage heat exchange water pipe 32, the heat exchanged water reenters the cold storage water tank 5 inside through the first cold storage heat exchange water pipe 31, the second energy releasing branch water pipe 53 and the second cold storage main water pipe 52 to release the cold storage capacity, and under the action of the cooling circulating pump 2, part of the water in the water collector 72 enters the plate heat exchanger 3 through the cooling water return main pipe 12 and the second cooling water return branch pipe 14 to exchange the cold storage capacity, the cold water enters the water distributor 71 through the second external heat exchange water pipe 34, the second cooling water inlet branch pipe 16 and the cooling water inlet main pipe 11, and enters a plurality of fan coils, and the cooling is realized by heat exchange in the fan coils; the cold water is supplied by the cold storage water tank 5 and the air-cooled screw water chiller 1 together;

[0139] When the first temperature sensor 35 and the second temperature sensor 36 detect that the outlet water temperature and the inlet water temperature of the cold storage water tank 5 are both greater than the second preset temperature value, it indicates that the cold storage capacity of the cold storage water tank 5 is completely released, the energy releasing state of the cold storage water tank 5 is exited, the first valve group 61 is opened, the second valve group 62, the third valve group 63, the fourth valve group 64, the fifth valve group 65, the cold storage valve group and the energy releasing valve group are closed, and the cooling circulating pump 2 and the air-cooled screw water chiller 1 are opened, the cold water prepared by the air-cooled screw water chiller 1 enters the water distributor 71 through the cooling water inlet main pipe 11, and enters a plurality of fan coils, and the cooling is realized by heat exchange in the fan coils; the water releasing energy in the plurality of fan coils reenters the air-cooled screw water chiller 1 through the water collector 72 and the cooling water return main pipe 12, and the air-cooled screw water chiller 1 is used for single cooling;

[0140] During the day, if there is excess electricity in the photovoltaic power generation system, the wind-cooled screw chiller 1 is powered by the photovoltaic power generation system, cooling is provided by the wind-cooled screw chiller 1, and the cold storage water tank is cooled at the same time: the second valve group 62, the fourth valve group 64 and the cold storage valve group are opened, the first valve group 61, the third valve group 63, the fifth valve group 65 and the energy release valve group are closed, the wind-cooled screw chiller 1, the cooling circulating pump 2 and the cold storage circulating pump 4 are opened, under the action of the cooling circulating pump 2, the water in the water collector 72 enters the wind-cooled screw chiller 1 through the cooling water main pipe 12, the cold water prepared by the wind-cooled screw chiller 1 enters the plate heat exchanger 3 through the cooling water main pipe 11, the first cooling water branch pipe 13 and the first external heat exchange water pipe 33, the water in the plate heat exchanger 3 enters the water distributor 71 through the second external heat exchange water pipe 34, the second cooling water branch pipe 16 and the cooling water main pipe 11, and enters the multiple fan coils, heat exchange is realized through the fan coils to provide cooling to the indoor; at the same time, under the action of the cold storage circulating pump 4, the water in the cold storage water tank 5 enters the plate heat exchanger 3 through the second cold storage main water pipe 52, the first cold storage branch water pipe 56 and the second cold storage heat exchange water pipe 32 for heat exchange, and the heat exchanged water enters the cold storage water tank 5 through the first cold storage heat exchange water pipe 31, the second cold storage branch water pipe 54 and the first cold storage main water pipe 51, the plate heat exchanger 3 is used for heat exchange, and the refrigerating capacity of the wind-cooled screw chiller 1 is stored in the cold storage water tank 5; the excess electricity of the solar power supply system is used to provide cooling and store cold during the day, thereby further reducing the operation cost.

[0141] Through the above process, the cold storage water tank 5 is used for cold storage in cooperation with the plate heat exchanger 3, the cold storage capacity of the cold storage water tank 5 is used for cooling during the day peak electricity period, thereby reducing the electricity consumption of the wind-cooled screw chiller 1 during the day and reducing the operation cost.

[0142] The above is the preferred embodiment of the present application, it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A cooling system, characterized by: Comprise: Air-cooled screw water chiller (1), the water outlet end of the air-cooled screw water chiller (1) is connected with the water inlet end of the water distributor (71) through the cold water supply main pipe (11), and the water inlet end of the air-cooled screw water chiller (1) is connected with the water outlet end of the water collector (72) through the cold water return main pipe (12); A plurality of fan-coil units, the water inlet end of the plurality of fan-coil units is connected with the water outlet end of the water distributor (71), and the water outlet end of the plurality of fan-coil units is connected with the water inlet end of the water collector (72); The first valve group (61) is arranged on the cold water supply main pipe (11); The cold water circulating pump (2) is arranged on the cold water return main pipe (12); The first cold water supply branch pipe (13) is connected with the first external heat exchange water pipe (33) of the plate heat exchanger (3) at one end, connected with the cold water supply main pipe (11) at the other end, and the connection between the first cold water supply branch pipe (13) and the cold water supply main pipe (11) is located between the first valve group (61) and the water outlet end of the air-cooled screw water chiller (1); The second valve group (62) is arranged on the first cold water supply branch pipe (13); The first cold water return branch pipe (15) is connected with the second external heat exchange water pipe (34) of the plate heat exchanger (3) at one end, connected with the cold water return main pipe (12) at the other end, and the connection between the first cold water return branch pipe (15) and the cold water return main pipe (12) is located between the water distributor (71) and the cold water circulating pump (2); The third valve group (63) is arranged on the first cold water return branch pipe (15); The second cold water return branch pipe (14) is connected with the first external heat exchange water pipe (33) of the plate heat exchanger (3) at one end, connected with the cold water return main pipe (12) at the other end, and the connection between the second cold water return branch pipe (14) and the cold water return main pipe (12) is located between the water inlet end of the air-cooled screw water chiller (1) and the cold water circulating pump (2); The fifth valve group (65) is arranged on the second cold water return branch pipe (14); The second cold water supply branch pipe (16) is connected with the second external heat exchange water pipe (34) of the plate heat exchanger (3) at one end, connected with the cold water supply main pipe (11) at the other end, and the connection between the second cold water supply branch pipe (16) and the cold water supply main pipe (11) is located between the first valve group (61) and the water distributor (71); The fourth valve group (64) is arranged on the second cold water supply branch pipe (16); The cold storage circulating pump (4) is connected with the second cold storage heat exchange water pipe (32) of the plate heat exchanger (3) at the water outlet end; A first cold accumulation branch water pipe (56) has one end connected with the water inlet end of the cold accumulation circulating pump (4) and the other end connected with the second cold accumulation main water pipe (52) of the cold accumulation water tank (5); A second cold accumulation branch water pipe (54) has one end connected with the first cold accumulation heat exchange water pipe (31) of the plate heat exchanger (3) and the other end connected with the first cold accumulation main water pipe (51) of the cold accumulation water tank (5); A cold accumulation valve group is arranged on the first cold accumulation branch water pipe (56) and the second cold accumulation branch water pipe (54); A first energy release branch water pipe (55) has one end connected with the water inlet end of the cold accumulation circulating pump (4) and the other end connected with the first cold accumulation main water pipe (51) of the cold accumulation water tank (5); A second energy release branch water pipe (53) has one end connected with the first cold accumulation heat exchange water pipe (31) of the plate heat exchanger (3) and the other end connected with the second cold accumulation main water pipe (52) of the cold accumulation water tank (5); An energy release valve group is arranged on the first energy release branch water pipe (55) and the second energy release branch water pipe (53).

2. The cold supply system according to claim 1, characterized by Further comprising: A photovoltaic power generation system, the air-cooled screw chiller (1) is electrically connected with the photovoltaic power generation system, and the photovoltaic power generation system is parallelly connected with commercial power for power supply; A controller, the photovoltaic power generation system and the air-cooled screw chiller (1) are electrically connected with the controller.

3. The cold supply system according to claim 2, characterized by The first valve group (61) and the fifth valve group (65) each comprise: A first electromagnetic valve, the first electromagnetic valve is electrically connected with the controller; Two first manual valves, the two first manual valves are respectively connected at two ends of the first electromagnetic valve; A second manual valve, the second manual valve is parallelly connected with the two first manual valves and the first electromagnetic valve.

4. The cooling system of claim 2, wherein, The second valve group (62), the third valve group (63) and the fourth valve group (64) each comprise: A second electromagnetic valve, the second electromagnetic valve is electrically connected with the controller; A third manual valve, the third manual valve is serially connected with the second electromagnetic valve.

5. The cooling system of claim 2, wherein, The cold accumulation valve group comprises: A first cold accumulation electromagnetic valve (69), the first cold accumulation electromagnetic valve (69) is arranged on the first cold accumulation branch water pipe (56); A second cold accumulation electromagnetic valve (68), the second cold accumulation electromagnetic valve (68) is arranged on the second cold accumulation branch water pipe (54); The first cold accumulation electromagnetic valve (69) and the second cold accumulation electromagnetic valve (68) are electrically connected with the controller.

6. The cooling system of claim 2, wherein, The energy release valve group comprises: A first cold supply electromagnetic valve (67), the first cold supply electromagnetic valve (67) is arranged on the first energy release branch water pipe (55); A second cold supply electromagnetic valve (66), the second cold supply electromagnetic valve (66) is arranged on the second energy release branch water pipe (53); The first cold supply electromagnetic valve (67) and the second cold supply electromagnetic valve (66) are electrically connected with the controller.

7. The cooling system of claim 2, wherein, The cold supply circulating pump (2) is provided with three groups, and the three groups of cold supply circulating pumps (2) are connected in parallel, and the cold supply circulating pump (2) is electrically connected with the controller.

8. The cooling system of claim 2, wherein, The cold storage circulating pump (4) is provided with two groups, and the two groups of cold storage circulating pumps (4) are connected in parallel, and the cold storage circulating pump (4) is electrically connected with the controller.

9. The cooling system of claim 2, wherein, Further comprising: A first temperature sensor (35) is arranged on the first cold storage heat exchange water pipe (31); A second temperature sensor (36) is arranged on the second cold storage heat exchange water pipe (32); The first temperature sensor (35) and the second temperature sensor (36) are electrically connected with the controller.

10. The cooling system of claim 2, wherein, Further comprising: A softened water tank (81) is connected with the water collector (72) through the water supplement pipe (84); A water supplement pump (82) is arranged on the water supplement pipe (84), and the water supplement pump (82) is electrically connected with the controller; A constant pressure tank (83) is connected with the water supplement pipe (84), and the connection between the constant pressure tank (83) and the water supplement pipe (84) is located between the water supplement pump (82) and the water collector (72); A water softener (86) is connected with the water inlet end of the softened water tank (81) through the flow guide pipe (87), and the water inlet end of the water softener (86) is connected with the water source through the water supplement inlet pipe (88); A water supplement electromagnetic valve (89) is arranged on the water supplement inlet pipe (88), and the water supplement electromagnetic valve (89) is electrically connected with the controller; A liquid level sensor (85) is arranged in the softened water tank (81), and the liquid level sensor (85) is electrically connected with the controller.

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