Air conditioning system and control method thereof

Abstract

The present invention discloses an air conditioning system and a control method thereof, comprising an energy storage container, a first water pump, a heat exchanger and an energy-making main unit; the energy storage container is provided with an upper water distributor, a lower water distributor and a phase change material; the upper water distributor is connected to the water outlet of the heat exchanger through a first pipe, and the lower water distributor is connected to the water inlet of the heat exchanger through a second pipe; the first water pump is installed on the second pipe; the upper water distributor is also connected to the second pipe through a third pipe, the lower water distributor is also connected to the first pipe through a fourth pipe, and the water outlet of the first water pump is also connected to the water inlet of the heat exchanger through a fifth pipe. The air conditioning system and the control method thereof disclosed in the present invention can realize the conversion of multiple modes, meet the requirements of the heat exchanger for water temperature, help reduce the volume of the energy storage container, and help maintain the stable operation of the system.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioning system and a control method thereof. Background Art

[0002] Central air conditioners usually use water or ice storage to store energy (including cold storage and heat storage). When energy release (including cold release and heat release) is needed, the energy stored in the water or ice is released to the user end (such as a heat exchanger).

[0003] In conventional energy storage air conditioning systems, since the amount of energy stored is relatively large, it only relies on water or ice to store energy, and the storage capacity is limited, so a very large energy storage container needs to be manufactured to carry the water or ice.

[0004] In conventional energy storage air conditioning systems, when the energy storage container releases energy, the outlet water temperature of the energy storage container is unstable and there is no adjustment mechanism to adjust it, resulting in unstable water supply temperature to the heat exchanger.

[0005] In view of this, it is necessary to provide an air conditioning system and a control method thereof that can improve energy storage and stable operation. Summary of the invention

[0006] The technical solution of the present invention provides an air conditioning system, including an energy storage container, a first water pump, a heat exchanger and an energy generating main unit;

[0007] The energy storage container is provided with an upper water distributor, a lower water distributor and a phase change material;

[0008] The upper water distributor is connected to the water outlet of the heat exchanger through a first pipe, and the lower water distributor is connected to the water inlet of the heat exchanger through a second pipe;

[0009] The first water pump is installed on the second pipeline;

[0010] The upper water distributor is also connected to the second pipeline through a third pipeline, the lower water distributor is also connected to the first pipeline through a fourth pipeline, and the water outlet of the first water pump is also connected to the water inlet of the heat exchanger through a fifth pipeline;

[0011] The first pipeline, the second pipeline, the third pipeline, the fourth pipeline and the fifth pipeline are respectively provided with valves.

[0012] Furthermore, a first valve is provided on the first pipeline, and a connection point between the fourth pipeline and the first pipeline is located between the first valve and a water outlet end of the heat exchanger;

[0013] The second pipeline is provided with a second valve and a third valve, the connection point between the third pipeline and the second pipeline is located between the second valve and the water inlet end of the first water pump, and the third valve is connected between the water outlet end of the first water pump and the water inlet end of the heat exchanger;

[0014] The third pipeline is provided with a fourth valve, and the fourth pipeline is provided with a fifth valve;

[0015] The fifth pipeline is provided with a sixth valve, and the sixth valve is connected between the water outlet of the energy control main unit and the water inlet of the heat exchanger.

[0016] Furthermore, the first pipeline is also connected to the water inlet end of the first water pump through a sixth pipeline;

[0017] The sixth pipeline is provided with a seventh valve.

[0018] Furthermore, the first pipeline is also connected to the water inlet end of the energy control main unit through a seventh pipeline, and an eighth valve is provided on the seventh pipeline;

[0019] The water outlet of the energy control main unit is connected to the second pipeline through an eighth pipeline, and a ninth valve is arranged on the eighth pipeline.

[0020] Furthermore, a second water pump is connected to the fifth pipeline;

[0021] The second water pump is connected between the water inlet end of the energy control main unit and the seventh pipeline.

[0022] Furthermore, a first temperature sensor is provided on the first pipe, a second temperature sensor is provided on the second pipe, a third temperature sensor is provided on the water inlet end of the heat exchanger, a fourth temperature sensor is provided on the water inlet end of the energy-generating main unit, and a fifth temperature sensor is provided on the water outlet end of the energy-generating main unit.

[0023] Furthermore, each of the valves is an automatic control valve, and each of the automatic control valves is connected to a control device signal;

[0024] The first temperature sensor, the second temperature sensor, the third temperature sensor, the fourth temperature sensor and the fifth temperature sensor are respectively connected to the control device by signal.

[0025] Furthermore, the energy-generating host is a variable frequency energy-generating host or a magnetic levitation energy-generating host.

[0026] Furthermore, it includes the energy storage container alone cooling state, the energy storage container alone heating state, the energy control host alone energy supply state, the energy storage container and the energy control host jointly cooling state and the energy storage container and the energy control host jointly heating state.

[0027] Furthermore, when the energy storage container is in a state of cooling alone, the lower water distributor, the first water pump, the second pipeline and the water inlet of the heat exchanger are connected; the upper water distributor, the first pipeline and the water outlet of the heat exchanger are connected;

[0028] When the energy storage container is in a state of heating alone, the upper water distributor, the third pipeline, the first water pump, the second pipeline and the water inlet of the heat exchanger are connected; the lower water distributor, the fourth pipeline, the first pipeline and the water outlet of the heat exchanger are connected;

[0029] When the energy control host is in a state of being powered by the energy control host alone, the first pipeline, the seventh pipeline, the fifth pipeline, the second water pump, the energy control host and the heat exchanger are connected;

[0030] When the energy storage container and the energy control main unit are in a joint cooling state, the lower water distributor and the second pipe are connected, the energy control main unit and the fifth pipe are connected, and the fifth pipe is connected to the water inlet of the heat exchanger; the upper water distributor and the first pipe are connected, and the first pipe is connected to the water outlet of the heat exchanger;

[0031] When the energy storage container and the energy control main unit are in a state of joint heating, the upper water distributor, the third pipeline, the second pipeline, the energy control main unit, the fifth pipeline, and the water inlet end of the heat exchanger are connected; the lower water distributor, the fourth pipeline, the first pipeline, and the water outlet end of the heat exchanger are connected.

[0032] Furthermore, when the energy storage container supplies energy to the heat exchanger alone, a temperature adjustment state is included in which the return water of the heat exchanger is used to adjust the temperature of water entering the heat exchanger;

[0033] The sixth pipeline connects the first pipeline and the water inlet end of the first water pump, and the water flow in the sixth pipeline is controlled by the seventh valve.

[0034] Further, it includes a cold storage state of the energy storage container and a heat storage state of the energy storage container;

[0035] When the energy storage container is in a cold storage state, the upper water distributor, the first pipeline, the seventh pipeline, the fifth pipeline, the energy control host, the eighth pipeline, the second pipeline and the lower water distributor are connected;

[0036] When the energy storage container is in a heat storage state, the lower water distributor, the fourth pipeline, the first pipeline, the seventh pipeline, the fifth pipeline, the energy control host, the eighth pipeline, the second pipeline, the third pipeline and the upper water distributor are connected.

[0037] The technical solution of the present invention also provides a control method for an air conditioning system, including the following control modes:

[0038] Energy storage container energy storage mode, including: energy storage container cold storage mode and energy storage container heat storage mode;

[0039] The energy storage container provides energy independently, including: the energy storage container provides cooling to the heat exchanger independently and the energy storage container provides heating to the heat exchanger independently;

[0040] Energy control host single energy supply mode: energy control host single cooling mode to heat exchanger and energy control host single heating mode to heat exchanger;

[0041] The energy storage container and the energy control host jointly supply energy mode, including: the energy storage container and the energy control host jointly supply cooling to the heat exchanger mode and the energy storage container and the energy control host jointly supply heating to the heat exchanger mode.

[0042] Furthermore, the energy storage container independent energy supply mode also includes a temperature adjustment mode, including:

[0043] When it is monitored that the difference between the outlet water temperature T2 of the energy storage container and the inlet water temperature T3 of the heat exchanger exceeds the first preset threshold range, the seventh valve is opened, the sixth pipeline is connected, and the return water of the heat exchanger is used to adjust the water temperature entering the heat exchanger;

[0044] Among them, when the energy storage container provides cooling alone, T2≤T3±a;

[0045] When the energy storage container provides heat alone, T2≥T3±a, where a is a constant.

[0046] Furthermore, the energy storage container energy storage mode also includes an automatic stop energy storage mode, including:

[0047] When it is detected that the difference between the water temperature T4 entering the energy generating host and the phase change temperature T0 of the phase change material is within the second preset threshold range, energy storage is stopped;

[0048] Among them, T0-b≤T4≤T0+b, and b is a constant.

[0049] Furthermore, the energy storage container single energy supply mode and the energy storage container and energy control host joint energy supply mode also include an automatic stop energy supply mode:

[0050] When it is monitored that the difference between the outlet water temperature T1 of the heat exchanger and the outlet water temperature T2 of the energy storage container is within a third preset threshold range, energy supply is stopped;

[0051] Among them, T2-c≤T1≤T2+c, and c is a constant.

[0052] Furthermore, the energy storage mode of the energy storage container also includes a mode for adjusting the outlet water temperature of the energy storage host, including:

[0053] Adjust the outlet water temperature of the energy-generating main unit to T5 until the difference between T5 and the phase change temperature T0 of the phase change material is within a fourth preset threshold range;

[0054] Among them, T0-d≤T5≤T0+d, and d is a constant.

[0055] Furthermore, the energy storage container single energy supply mode and the energy storage container and energy generation host joint energy supply mode also include a mode of adjusting the outlet water temperature of the heat exchanger, including:

[0056] Adjusting the outlet water temperature T1 of the heat exchanger until the difference between T1 and the phase change temperature T0 of the phase change material is within a fifth preset threshold range;

[0057] Among them, T0-e≤T1≤T0+e, and e is a constant.

[0058] The above technical solution has the following beneficial effects:

[0059] The air conditioning system provided by the present invention realizes energy storage and release of water and phase change material by arranging phase change material in the energy storage container. The phase change material is immersed in water and fully contacts with water, so that the energy stored in the phase change material is fully utilized, thereby improving the energy storage and release performance and reducing the volume of the energy storage container.

[0060] The air conditioning system and control method thereof provided by the present invention can realize the conversion of multiple modes, meet the requirements of the heat exchanger on water temperature, and help maintain the stable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 A schematic diagram of a phase change material arranged in an energy storage container provided by an embodiment of the present invention;

[0062] Figure 2 A schematic diagram of the arrangement of an air conditioning system provided by an embodiment of the present invention;

[0063] Figure 3 It is a partial schematic diagram of the connection between the upper water distributor, the lower water distributor, the first pipeline, the second pipeline, the third pipeline and the fourth pipeline;

[0064] Figure 4 A schematic diagram of the arrangement of an air conditioning system provided by another embodiment of the present invention;

[0065] Figure 5 Schematic diagram of the energy storage container supplying cooling to the heat exchanger alone;

[0066] Figure 6 A schematic diagram of adjusting the water inlet temperature of the heat exchanger through the sixth pipeline when the energy storage container alone supplies cold air to the heat exchanger;

[0067] Figure 7 Schematic diagram of the case where the energy storage container alone supplies heat to the heat exchanger;

[0068] Figure 8 A schematic diagram of adjusting the water inlet temperature of the heat exchanger through the sixth pipeline when the energy storage container alone supplies heat to the heat exchanger;

[0069] Fig. 9 A schematic diagram of the energy storage container and the energy generating host jointly supplying cooling to the heat exchanger;

[0070] Fig.10 A schematic diagram of the energy storage container and the energy generating host jointly supplying heat to the heat exchanger;

[0071] Fig.11 Schematic diagram of the energy storage container storing cold;

[0072] Fig.12 Schematic diagram of the energy storage container storing heat;

[0073] Fig.13 Schematic diagram of the energy-saving host supplying energy to the heat exchanger alone. DETAILED DESCRIPTION

[0074] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. The same components are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0075] like Figure 1-3 As shown, an air conditioning system provided by an embodiment of the present invention includes an energy storage container 100, a first water pump 300, a heat exchanger 400 and an energy generating main unit 500. The energy storage container 100 has an upper water distributor 101, a lower water distributor 102 and a phase change material 200 therein.

[0076] The upper water distributor 101 is connected to the water outlet of the heat exchanger 400 through the first pipe 1, and the lower water distributor 102 is connected to the water inlet of the heat exchanger 400 through the second pipe 2. The first water pump 300 is installed on the second pipe 2.

[0077] The upper water distributor 101 is also connected to the second pipe 2 through the third pipe 3, the lower water distributor 102 is also connected to the first pipe 1 through the fourth pipe 4, and the water outlet of the first water pump 300 is also connected to the water inlet of the heat exchanger 400 through the fifth pipe 5.

[0078] Valves are respectively arranged on the first pipeline 1 , the second pipeline 2 , the third pipeline 3 , the fourth pipeline 4 and the fifth pipeline 5 .

[0079] The energy storage container 100 in the embodiment of the present invention is arranged with a phase change material 200 to realize energy storage and release of the combination of water and the phase change material 200. The phase change material 200 is immersed in water and is in full contact with water. The energy stored in the phase change material 200 is fully utilized, thereby improving the energy storage and release performance and reducing the volume of the energy storage container 100 (water storage container).

[0080] Phase change material (PCM-Phase Change Material) refers to a material that changes its state and provides latent heat without changing its temperature. The process of changing physical properties is called phase change process, during which phase change materials will absorb or release a large amount of latent heat.

[0081] Phase change materials mainly include three categories: inorganic phase change materials, organic phase change materials and composite phase change materials. Among them, inorganic phase change materials mainly include crystalline hydrated salts, molten salts, metals or alloys, etc.; organic phase change materials mainly include paraffin, acetic acid and other organic substances; composite phase change materials are composed of several different phase change materials. It can effectively overcome the shortcomings of single inorganic or organic phase change heat storage materials, and can also improve the application effect of phase change materials and expand their application scope.

[0082] Phase change materials can be directly processed into the desired shape as needed, or they can be mixed into building materials to form the desired shape.

[0083] The phase change material in the present invention can be set in a spherical, plate-like, columnar, etc. shape. The exterior of the phase change material is wrapped with a heat-conducting shell, and the phase change material is filled in the heat-conducting shell. The heat-conducting shell is a shell capable of transferring heat, which can be a metal shell, for example, a copper shell, an iron shell, an aluminum shell, etc.

[0084] The phase change material in the present invention is arranged between the lower water distributor 102 and the upper water distributor 101 .

[0085] The energy control host 500 is a cold and hot preparation machine, which can cool and heat. The heat exchanger 400 is used to supply energy (cooling or heating) to the user. The first water pump 300 is used to supply water in the second pipe 2 to the heat exchanger 400 or the energy control host 500.

[0086] In this embodiment, the energy storage container 100 can supply energy to the heat exchanger 400 alone, or the energy storage container 100 and the energy control host 500 can jointly supply energy to the heat exchanger 400, which can ensure that the water inlet temperature of the heat exchanger 400 meets the requirements and is conducive to the stable operation of the system.

[0087] Corresponding valves are respectively provided on the first pipeline 1, the second pipeline 2, the third pipeline 3, the fourth pipeline 4 and the fifth pipeline 5 to control the on-off of each pipeline.

[0088] When the water temperature provided by the energy storage container 100 can meet the water temperature requirement of the heat exchanger 400 , the energy storage container 100 is used to supply energy to the heat exchanger 400 alone.

[0089] When the energy storage container 100 alone supplies cold to the heat exchanger 400, the water in the energy storage container 100 carries the cold in the phase change material 200 and is supplied to the heat exchanger 400 via the lower water distributor 102, the second pipe 2, and the first water pump 300. After the heat exchanger 400 exchanges heat with the outside, the water returns to the energy storage container 100 via the first pipe 1 and the upper water distributor 101.

[0090] When the energy storage container 100 alone supplies heat to the heat exchanger 400, the water in the energy storage container 100 carries the heat in the phase change material 200 and is supplied to the heat exchanger 400 via the upper water distributor 101, the third pipe 3, the second pipe 2, and the first water pump 300. After the heat exchanger 400 exchanges heat with the outside, the water returns to the energy storage container 100 via the first pipe 1, the fourth pipe 4, and the lower water distributor 102.

[0091] When the water temperature provided by the energy storage container 100 cannot meet the water temperature requirement of the heat exchanger 400 , the energy storage container 100 and the energy control host 500 are used to supply energy to the heat exchanger 400 .

[0092] When the temperature of cold water provided by the energy storage container 100 is higher than the water temperature required by the heat exchanger 400, the energy storage container 100 and the energy control host 500 are used to provide cooling to the heat exchanger 400, as follows:

[0093] When the energy storage container 100 and the energy control host 500 jointly supply cooling to the heat exchanger 400, the water in the energy storage container 100 carries the cooling energy in the phase change material 200 through the lower water distributor 102, the second pipe 2, the first water pump 300, and the fifth pipe 5 to the energy control host 500. The energy control host 500 continues to cool the water and supplies the cooled water to the heat exchanger 400 through the fifth pipe 5, which can meet the temperature requirement of the heat exchanger 400. After the heat exchanger 400 exchanges heat with the outside, the water returns to the energy storage container 100 through the first pipe 1 and the upper water distributor 101.

[0094] When the temperature of hot water provided by the energy storage container 100 is lower than the water temperature required by the heat exchanger 400, the energy storage container 100 and the energy control host 500 are used to supply heat to the heat exchanger 400, as follows:

[0095] When the energy storage container 100 and the energy control host 500 jointly supply heat to the heat exchanger 400, the water in the energy storage container 100 carries the heat in the phase change material 200 through the upper water distributor 101, the third pipe 3, the second pipe 2, the first water pump 300, and the fifth pipe 5 to the energy control host 500. The energy control host 500 continues to heat the water and supplies the heated water to the heat exchanger 400 through the fifth pipe 5, which can meet the temperature requirement of the heat exchanger 400. After the heat exchanger 400 exchanges heat with the outside, the water returns to the energy storage container 100 through the first pipe 1, the fourth pipe 4, and the lower water distributor 102.

[0096] In one embodiment, if Figure 2-3 As shown, a first valve 11 is provided on the first pipeline 1 , and the connection point between the fourth pipeline 4 and the first pipeline 1 is located between the first valve 11 and the water outlet end of the heat exchanger 400 .

[0097] A second valve 21 and a third valve 22 are provided on the second pipeline 2. The connection point between the third pipeline 3 and the second pipeline 2 is located between the second valve 21 and the water inlet end of the first water pump 300. The third valve 22 is connected between the water outlet end of the first water pump 300 and the water inlet end of the heat exchanger 400.

[0098] The third pipeline 3 is provided with a fourth valve 31 , and the fourth pipeline 4 is provided with a fifth valve 41 .

[0099] The fifth pipeline 5 is provided with a sixth valve 51 , and the sixth valve 51 is connected between the water outlet of the energy control main unit 500 and the water inlet of the heat exchanger 400 .

[0100] When the energy storage container 100 provides cooling alone, the first valve 11 is opened, the second valve 21 is opened, the third valve 22 is opened, the fourth valve 31 is closed, the fifth valve 41 is closed, and the sixth valve 51 is closed.

[0101] When the energy storage container 100 provides heat alone, the first valve 11 is closed, the second valve 21 is closed, the sixth valve 51 is closed, the third valve 22 is opened, the fourth valve 31 is opened, and the fifth valve 41 is opened.

[0102] When the energy storage container 100 and the energy control host 500 jointly provide cooling, the first valve 11 is opened, the second valve 21 is opened, the sixth valve 51 is opened, the third valve 22 is closed, the fourth valve 31 is closed, and the fifth valve 41 is closed.

[0103] When the energy storage container 100 and the energy generating host 500 jointly provide heat, the first valve 11 is closed, the second valve 21 is closed, the third valve 22 is closed, the fourth valve 31 is opened, the fifth valve 41 is opened, and the sixth valve 51 is opened.

[0104] In one embodiment, if Figure 2As shown, the first pipeline 1 is also connected to the water inlet end of the first water pump 300 through the sixth pipeline 6, and the sixth pipeline 6 is provided with a seventh valve 61.

[0105] When the energy storage container 100 supplies energy to the heat exchanger 400 alone, if the water temperature in the energy storage container 100 does not meet the inlet water temperature requirement of the heat exchanger 400, the seventh valve 61 can be opened to allow part of the return water in the heat exchanger 400 to return to the second pipe 2, thereby achieving the effect of adjusting the inlet water temperature of the heat exchanger 400. Specifically:

[0106] When the energy storage container 100 alone supplies cold water to the heat exchanger 400, if the temperature of the cold water is lower than the water inlet temperature required by the heat exchanger 400, the seventh valve 61 is opened, and part of the hot water returning from the heat exchanger 400 can enter the first water pump 300 through the sixth pipe 6 and mix with the cold water in the second pipe 2, thereby increasing the water temperature supplied to the heat exchanger 400 and meeting the water temperature requirement of the heat exchanger 400.

[0107] When the energy storage container 100 supplies heat to the heat exchanger 400 alone, if the temperature of the hot water is higher than the water inlet temperature required by the heat exchanger 400, the seventh valve 61 is opened, and part of the cold water returning from the heat exchanger 400 can enter the first water pump 300 through the sixth pipe 6 and mix with the hot water in the second pipe 2, thereby reducing the water temperature supplied to the heat exchanger 400 and meeting the water temperature requirement of the heat exchanger 400.

[0108] The amount of water entering the sixth pipe 6 can be controlled by controlling the opening of the seventh valve 61 , thereby adjusting the temperature of water supplied to the heat exchanger 400 .

[0109] In one embodiment, if Figure 4 As shown, the first pipeline 1 is also connected to the water inlet end of the energy control host 500 through the seventh pipeline 7, and the seventh pipeline 7 is provided with an eighth valve 71;

[0110] The water outlet of the energy control main unit 500 is connected to the second pipeline 2 through the eighth pipeline 8 , and a ninth valve 81 is provided on the eighth pipeline 8 .

[0111] Such an arrangement can realize the energy storage cycle of the energy storage container 100, specifically including cold storage and heat storage.

[0112] like Fig.11 As shown, when the energy storage container 100 stores cold, the first valve 11 is opened, the eighth valve 71 is opened, the ninth valve 81 is opened, the second valve 21 is opened, the third valve 22 is closed, the fourth valve 31 is closed, the fifth valve 41 is closed, the sixth valve 51 is closed, and the seventh valve 61 is closed.

[0113] The water in the energy storage container 100 enters the energy control host 500 through the upper water distributor 101, the first pipe 1, the seventh pipe 7, and the fifth pipe 5 for cooling. The cooled cold water returns to the energy storage container 100 through the eighth pipe 8, the second pipe 2, and the lower water distributor 102.

[0114] like Fig.12 As shown, when the energy storage container 100 stores heat, the first valve 11 is closed, the second valve 21 is closed, the third valve 22 is closed, the sixth valve 51 is closed, the seventh valve 61 is closed, the fourth valve 31 is opened, the fifth valve 41 is opened, the eighth valve 71 is opened, and the ninth valve 81 is opened.

[0115] The water in the energy storage container 100 enters the energy control host 500 through the lower water distributor 102, the fourth pipe 4, the first pipe 1, the seventh pipe 7, and the fifth pipe 5 to be heated. The heated hot water returns to the energy storage container 100 through the eighth pipe 8, the second pipe 2, the third pipe 3, and the upper water distributor 101.

[0116] Such an arrangement can enable the energy-generating main unit 500 to supply energy to the heat exchanger 400 independently.

[0117] like Fig.13 As shown, when the energy control host 500 supplies energy (cooling or heating) to the heat exchanger 400 alone, the first valve 11 is closed, the second valve 21 is closed, the third valve 22 is closed, the fourth valve 31 is closed, the fifth valve 41 is closed, and the seventh valve 61 is closed. The sixth valve 51 and the eighth valve 71 are opened, the first pipeline 1, the seventh pipeline 7, the fifth pipeline 5, the second water pump 600, the energy control host 500 and the heat exchanger 400 are connected, and the water circulation between the energy control host 500 and the heat exchanger 400 is realized.

[0118] The water circulation when the energy-saving main unit 500 provides cooling and heating to the heat exchanger 400 alone is the same.

[0119] In one embodiment, if Figure 4 As shown, a second water pump 600 is connected to the fifth pipeline 5 .

[0120] The second water pump 600 is connected between the water inlet end of the energy control main unit 500 and the seventh pipe 7 .

[0121] The second water pump 600 is mainly used during energy storage to provide power for water circulation during energy storage.

[0122] In one embodiment, if Figure 2 and Figure 4As shown, a first temperature sensor 10 is provided on the first pipe 1, a second temperature sensor 20 is provided on the second pipe 2, a third temperature sensor 30 is provided at the water inlet end of the heat exchanger 400, a fourth temperature sensor 40 is provided at the water inlet end of the energy control host 500, and a fifth temperature sensor 50 is provided at the water outlet end of the energy control host 500.

[0123] The phase change temperature of the phase change material is T0, the first temperature sensor 10 is mainly used to monitor the water temperature T1 of the water returning from the heat exchanger 400, the second temperature sensor 20 is mainly used to monitor the water temperature T2 of the water flowing out of the energy storage container 100, the third temperature sensor 30 is mainly used to monitor the water temperature T3 of the water entering the heat exchanger 400, the fourth temperature sensor 40 is mainly used to monitor the water temperature T4 of the water entering the energy control host 500, and the fifth temperature sensor 50 is mainly used to monitor the water temperature T5 of the water flowing out of the energy control host 500. Different operation modes can be performed according to the above-mentioned monitored temperatures.

[0124] Phase transition temperature refers to the temperature at which a phase change material undergoes a mode or phase change, such as from liquid to solid or from solid to liquid.

[0125] When the energy storage container 100 is supplying energy alone, if the difference between the outlet water temperature T2 of the energy storage container 100 and the inlet water temperature T3 of the heat exchanger 400 exceeds the first preset threshold range, the seventh valve 61 is opened, the sixth pipe 6 is connected, and the return water of the heat exchanger 400 is used to adjust the water temperature entering the heat exchanger 400 to meet the water temperature requirement of the heat exchanger 400. Specifically, when the energy storage container 100 is supplying cooling alone, T2≤T3±a; when the energy storage container 100 is supplying heating alone, T2≥T3±a, and a is a constant.

[0126] When the energy storage container 100 is storing energy, if the difference between the water temperature T4 entering the energy control host 500 and the phase change temperature T0 of the phase change material 200 is within the second preset threshold range, it means that the temperature of the water provided by the energy control host 500 is substantially consistent with the temperature of the water in the energy storage container 100, then energy storage is stopped for easy control. Specifically, T0-b≤T4≤T0+b, where b is a constant.

[0127] When the energy storage container 100 supplies energy alone or the energy storage container 100 and the energy control host 500 jointly supply energy, if the difference between the outlet water temperature T1 of the heat exchanger 400 and the outlet water temperature T2 of the energy storage container 100 is within the third preset threshold range, it means that the temperature of the water in the energy storage container 100 is substantially the same as the temperature of the refluxed water, and it is necessary to stop supplying energy for energy storage, so as to facilitate control. Specifically, T2-c≤T1≤T2+c, where c is a constant.

[0128] When the energy storage container 100 is storing energy, the outlet water temperature of the energy-generating host 500 can be adjusted to T5 until the difference between T5 and the phase change temperature T0 of the phase change material 200 is within the fourth preset threshold range, which is conducive to promoting the phase change material 200 to transform from liquid to solid and perform rapid energy storage. Specifically, T0-d≤T5≤T0+d, d is a constant. T5 is preferably less than T0, which is conducive to promoting the phase change material 200 to transform from liquid to solid.

[0129] When the energy storage container 100 is powered alone or when the energy storage container 100 and the energy generating host 500 are powered together, the outlet water temperature T1 of the heat exchanger 400 is adjusted until the difference between T1 and the phase change temperature T0 of the phase change material 200 is within the fifth preset threshold range, which is conducive to promoting the phase change material 200 to change from solid to liquid and release energy quickly. Specifically, T0-e≤T1≤T0+e, e is a constant, T1 is preferably greater than T0, which is conducive to promoting the phase change material 200 to change from solid to liquid.

[0130] The constants a, b, c, d, and e mentioned above can be set to corresponding values ​​according to specific needs, and d and e can be constants with equal values. The specific values ​​of the temperatures T0, T1, T2, T3, T4, and T5 mentioned above can be set according to specific circumstances.

[0131] In one embodiment, each valve is an automatic control valve, and each automatic control valve is connected to the control device signal; the first temperature sensor 10, the second temperature sensor 20, the third temperature sensor 30, the fourth temperature sensor 40 and the fifth temperature sensor 50 are respectively connected to the control device signal.

[0132] The signal connection in the present invention is a communication signal connection or an electrical signal connection. The control device can be a computer, a chip, a single chip microcomputer, etc. The valve is an automatic control valve that can be turned on and off, such as a solenoid valve. The first valve 11, the second valve 21, the third valve 22, the fourth valve 31, the fifth valve 41, the sixth valve 51, the seventh valve 61, the eighth valve 71 and the ninth valve 81 are all automatic control valves, and are respectively connected to the control device through a data line or through a wireless signal.

[0133] The first temperature sensor 10 , the second temperature sensor 20 , the third temperature sensor 30 , the fourth temperature sensor 40 and the fifth temperature sensor 50 are respectively connected to the control device through data lines or through wireless signals.

[0134] The control device can control the specific switch of each valve according to the temperature signal transmitted by the temperature sensor to realize various control modes, realize automatic control and management, and improve the convenience of operation.

[0135] In one embodiment, the energy-control host 500 is a variable frequency energy-control host or a magnetic suspension energy-control host, which can adjust the outlet water temperature.

[0136] In one embodiment, if Figure 5 , Figure 7 , Fig. 9 and Fig.10 As shown, it includes the energy storage container 100 providing cooling alone, the energy storage container 100 providing heating alone, the energy control host 500 providing energy alone, the energy storage container 100 and the energy control host 500 providing cooling together, and the energy storage container 100 and the energy control host 500 providing heating together.

[0137] In one embodiment, if Figure 5 As shown, when the energy storage container 100 is in the cooling state alone, the lower water distributor 102, the first water pump 300, the second pipeline 2 and the water inlet end of the heat exchanger 400 are connected; the upper water distributor 101, the first pipeline 1 and the water outlet end of the heat exchanger 400 are connected.

[0138] like Figure 7 As shown, when the energy storage container 100 is in the state of heating alone, the upper water distributor 101, the third pipeline 3, the first water pump 300, the second pipeline 2 and the water inlet end of the heat exchanger 400 are connected; the lower water distributor 102, the fourth pipeline, the first pipeline 1 and the water outlet end of the heat exchanger 400 are connected.

[0139] like Fig.13 As shown, when the energy control host 500 is in the state of supplying energy alone, the first pipeline 1, the seventh pipeline 7, the fifth pipeline 5, the second water pump 600, the energy control host 500 and the heat exchanger 400 are connected.

[0140] like Fig. 9 As shown, when the energy storage container 100 and the energy control main unit 500 are in the joint cooling state, the lower water distributor 102 and the second pipe 2 are connected, the energy control main unit 500 and the fifth pipe 5 are connected, and the fifth pipe 5 is connected to the water inlet end of the heat exchanger 400; the upper water distributor 101 is connected to the first pipe 1, and the first pipe 1 is connected to the water outlet end of the heat exchanger 400.

[0141] like Fig.10 As shown, when the energy storage container 100 and the energy control host 500 are in a joint heating state, the upper water distributor 101, the third pipeline 3, the second pipeline 2, the energy control host 500, the fifth pipeline 5, and the water inlet end of the heat exchanger 400 are connected; the lower water distributor 102, the fourth pipeline, the first pipeline 1 and the water outlet end of the heat exchanger 400 are connected.

[0142] In one embodiment, if Figure 6 and Figure 8As shown, when the energy storage container 100 supplies energy to the heat exchanger 400 alone, a temperature adjustment state is included in which the return water of the heat exchanger 400 is used to adjust the temperature of the water entering the heat exchanger 400. Specifically, the sixth pipeline 6 is connected to the first pipeline 1 and the water inlet end of the first water pump 300, and the water flow in the sixth pipeline 6 is controlled by the seventh valve 61.

[0143] In one embodiment, if Fig.11 and Fig.12 As shown, the air conditioning system includes a cold storage state of the energy storage container 100 and a heat storage state of the energy storage container 100.

[0144] like Fig.11 As shown, when the energy storage container 100 is in the cold storage state, the upper water distributor 101, the first pipeline 1, the seventh pipeline 7, the fifth pipeline 5, the energy control host 500, the eighth pipeline 8, the second pipeline 2 and the lower water distributor 102 are connected;

[0145] like Fig.12 As shown, when the energy storage container 100 is in heat storage state, the lower water distributor 102, the fourth pipeline 4, the first pipeline 1, the seventh pipeline 7, the fifth pipeline 5, the energy control host 500, the eighth pipeline 8, the second pipeline 2, the third pipeline 3 and the upper water distributor 101 are connected.

[0146] Combination Figure 1-13 As shown, an embodiment of the present invention provides a control method of the air conditioning system of the aforementioned embodiment, including the following control modes:

[0147] The energy storage mode of the energy storage container 100 includes: a cold storage mode of the energy storage container 100 and a heat storage mode of the energy storage container 100 .

[0148] The energy storage container 100 provides energy independently, including: a mode in which the energy storage container 100 provides cooling to the heat exchanger 400 independently and a mode in which the energy storage container 100 provides heating to the heat exchanger 400 independently.

[0149] The energy control host 500 supplies energy to the heat exchanger 400 independently in a cooling mode and the energy control host 500 supplies energy to the heat exchanger 400 independently in a heating mode.

[0150] The energy storage container 100 and the energy control host 500 jointly supply energy, including: the energy storage container 100 and the energy control host 500 jointly supply cooling to the heat exchanger 400 and the energy storage container 100 and the energy control host 500 jointly supply heating to the heat exchanger 400.

[0151] In one embodiment, the energy storage container 100 also includes a temperature adjustment mode in the energy supply mode alone, including: when it is monitored that the difference between the outlet water temperature T2 of the energy storage container 100 and the inlet water temperature T3 of the heat exchanger 400 exceeds the first preset threshold range, the seventh valve 61 is opened, the sixth pipe 6 is connected, and the return water of the heat exchanger 400 is used to adjust the water temperature entering the heat exchanger 400. When the energy storage container 100 is used alone for cooling, T2≤T3±a; when the energy storage container 100 is used alone for heating, T2≥T3±a, and a is a constant.

[0152] In one embodiment, the energy storage mode of the energy storage container 100 also includes an automatic stop energy storage mode, including: when the difference between the water temperature T4 entering the energy generating host 500 and the phase change temperature T0 of the phase change material 200 is detected to be within a second preset threshold range, energy storage is stopped. Wherein, T0-b≤T4≤T0+b, b is a constant.

[0153] In one embodiment, the energy storage container 100 single energy supply mode and the energy storage container 100 and the energy control host 500 joint energy supply mode also include an automatic stop energy supply mode: when the difference between the outlet water temperature T1 of the heat exchanger 400 and the outlet water temperature T2 of the energy storage container 100 is monitored to be within a third preset threshold range, the energy supply is stopped. Wherein, T2-c≤T1≤T2+c, c is a constant.

[0154] In one embodiment, the energy storage mode of the energy storage container 100 also includes a water outlet temperature adjustment mode of the energy control host 500, including: adjusting the water outlet temperature of the energy control host 500 to T5, until the difference between T5 and the phase change temperature T0 of the phase change material 200 is within a fourth preset threshold range. Wherein, T0-d≤T5≤T0+d, d is a constant.

[0155] In one embodiment, the energy storage container 100 single energy supply mode and the energy storage container 100 and the energy generation host 500 joint energy supply mode also include a water outlet temperature adjustment mode of the heat exchanger 400, including: adjusting the water outlet temperature T1 of the heat exchanger 400 until the difference between T1 and the phase change temperature T0 of the phase change material 200 is within a fifth preset threshold range. Wherein, T0-e≤T1≤T0+e, e is a constant.

[0156] In summary, the air-conditioning system provided by the present invention arranges phase change materials in the energy storage container to achieve combined energy storage and release of water and phase change materials. The phase change materials are immersed in water and in full contact with water, so that the energy stored in the phase change materials is fully utilized, thereby improving the energy storage and release performance and reducing the volume of the energy storage container.

[0157] The air conditioning system and control method thereof provided by the present invention can realize the conversion of multiple modes, meet the requirements of the heat exchanger on water temperature, and help maintain the stable operation of the system.

[0158] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0159] The above description is only the principle and preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, several other modifications can be made based on the principle of the present invention, which should also be considered as the protection scope of the present invention.

Claims

1. An air conditioning system, characterized in that: It comprises an energy storage container (100), a first water pump (300), a heat exchanger (400) and an energy generating main unit (500); The energy storage container (100) has an upper water distributor (101), a lower water distributor (102) and a phase change material (200); The upper water distributor (101) is connected to the water outlet of the heat exchanger (400) through a first pipe (1), and the lower water distributor (102) is connected to the water inlet of the heat exchanger (400) through a second pipe (2); The first water pump (300) is installed on the second pipeline (2); The upper water distributor (101) is also connected to the second pipeline (2) via a third pipeline (3), the lower water distributor (102) is also connected to the first pipeline (1) via a fourth pipeline (4), and the water outlet of the first water pump (300) is also connected to the water inlet of the heat exchanger (400) via a fifth pipeline (5); The energy control host (500) is connected in series to the fifth pipeline (5), and the first water pump (300) is used to supply water in the second pipeline (2) to the heat exchanger (400) or the energy control host (500); The first pipeline (1) is connected to the water inlet of the energy control main unit (500) through a seventh pipeline (7), and the water outlet of the energy control main unit (500) is connected to the second pipeline (2) through an eighth pipeline (8); an eighth valve (71) is provided on the seventh pipeline (7), and a ninth valve (81) is provided on the eighth pipeline (8); valves are respectively provided on the first pipeline (1), the second pipeline (2), the third pipeline (3), the fourth pipeline (4) and the fifth pipeline (5).

2. The air conditioning system according to claim 1, characterized in that: The first pipeline (1) is provided with a first valve (11), and the connection point between the fourth pipeline (4) and the first pipeline (1) is located between the first valve (11) and the water outlet end of the heat exchanger (400); The second pipeline (2) is provided with a second valve (21) and a third valve (22); the connection point between the third pipeline (3) and the second pipeline (2) is located between the second valve (21) and the water inlet end of the first water pump (300); and the third valve (22) is connected between the water outlet end of the first water pump (300) and the water inlet end of the heat exchanger (400); The third pipeline (3) is provided with a fourth valve (31), and the fourth pipeline (4) is provided with a fifth valve (41); The fifth pipeline (5) is provided with a sixth valve (51), and the sixth valve (51) is connected between the water outlet of the energy control main unit (500) and the water inlet of the heat exchanger (400).

3. The air conditioning system according to claim 1, characterized in that: The first pipeline (1) is also connected to the water inlet end of the first water pump (300) through a sixth pipeline (6); The sixth pipeline (6) is provided with a seventh valve (61).

4. The air conditioning system according to claim 1, characterized in that: A second water pump (600) is connected to the fifth pipeline (5); The second water pump (600) is connected between the water inlet end of the energy control main unit (500) and the seventh pipeline (7).

5. The air conditioning system according to any one of claims 1 to 4, characterized in that: The first pipe (1) is provided with a first temperature sensor (10), the second pipe (2) is provided with a second temperature sensor (20), the water inlet end of the heat exchanger (400) is provided with a third temperature sensor (30), the water inlet end of the energy control main unit (500) is provided with a fourth temperature sensor (40), and the water outlet end of the energy control main unit (500) is provided with a fifth temperature sensor (50).

6. The air conditioning system according to claim 5, characterized in that: Each of the valves is an automatic control valve, and each of the automatic control valves is connected to a control device signal; The first temperature sensor (10), the second temperature sensor (20), the third temperature sensor (30), the fourth temperature sensor (40) and the fifth temperature sensor (50) are respectively connected to the control device via signals.

7. The air conditioning system according to claim 1, characterized in that: The energy-control host (500) is a variable frequency energy-control host or a magnetic suspension energy-control host.

8. The air conditioning system according to claim 4, characterized in that: The system includes a state where the energy storage container (100) alone provides cooling, a state where the energy storage container (100) alone provides heating, a state where the energy control host (500) alone provides energy, a state where the energy storage container (100) and the energy control host (500) jointly provide cooling, and a state where the energy storage container (100) and the energy control host (500) jointly provide heating.

9. The air conditioning system according to claim 8, characterized in that: When the energy storage container (100) is in a state of providing cooling alone, the lower water distributor (102), the first water pump (300), the second pipeline (2) and the water inlet of the heat exchanger (400) are connected; the upper water distributor (101), the first pipeline (1) and the water outlet of the heat exchanger (400) are connected; When the energy storage container (100) is in a state of heating alone, the upper water distributor (101), the third pipeline (3), the first water pump (300), the second pipeline (2) and the water inlet of the heat exchanger (400) are connected; the lower water distributor (102), the fourth pipeline, the first pipeline (1) and the water outlet of the heat exchanger (400) are connected; When the energy control main unit (500) is in a state of supplying energy alone, the first pipeline (1), the seventh pipeline (7), the fifth pipeline (5), the second water pump (600), the energy control main unit (500) and the heat exchanger (400) are connected; When the energy storage container (100) and the energy control main unit (500) are in a joint cooling state, the lower water distributor (102) and the second pipe (2) are connected, the energy control main unit (500) and the fifth pipe (5) are connected, and the fifth pipe (5) is connected to the water inlet end of the heat exchanger (400); the upper water distributor (101) and the first pipe (1) are connected, and the first pipe (1) is connected to the water outlet end of the heat exchanger (400); When the energy storage container (100) and the energy control main unit (500) are in a state of joint heating, the upper water distributor (101), the third pipeline (3), the second pipeline (2), the energy control main unit (500), the fifth pipeline (5), and the water inlet of the heat exchanger (400) are connected; and the lower water distributor (102), the fourth pipeline, the first pipeline (1), and the water outlet of the heat exchanger (400) are connected.

10. The air conditioning system according to claim 3, characterized in that: When the energy storage container (100) supplies energy to the heat exchanger (400) alone, a temperature adjustment state is included in which the return water of the heat exchanger (400) is used to adjust the temperature of water entering the heat exchanger (400); The sixth pipeline (6) is connected to the first pipeline (1) and the water inlet end of the first water pump (300), and the water flow in the sixth pipeline (6) is controlled by the seventh valve (61).

11. The air conditioning system according to claim 1, characterized in that: The energy storage container (100) comprises a cold storage state and a heat storage state; When the energy storage container (100) is in a cold storage state, the upper water distributor (101), the first pipeline (1), the seventh pipeline (7), the fifth pipeline (5), the energy control main unit (500), the eighth pipeline (8), the second pipeline (2) and the lower water distributor (102) are connected; When the energy storage container (100) is in a heat storage state, the lower water distributor (102), the fourth pipeline (4), the first pipeline (1), the seventh pipeline (7), the fifth pipeline (5), the energy control main unit (500), the eighth pipeline (8), the second pipeline (2), the third pipeline (3) and the upper water distributor (101) are connected.

12. A control method for an air conditioning system according to any one of claims 1 to 11, characterized in that: The control modes include: The energy storage container (100) energy storage mode includes: the energy storage container (100) cold storage mode and the energy storage container (100) heat storage mode; The energy storage container (100) independently supplies energy to the heat exchanger (400), including: a mode in which the energy storage container (100) independently supplies cooling to the heat exchanger (400) and a mode in which the energy storage container (100) independently supplies heating to the heat exchanger (400); The energy control host (500) supplies energy to the heat exchanger (400) independently in a cooling mode and the energy control host (500) supplies energy to the heat exchanger (400) independently in a heating mode; The energy storage container (100) and the energy control host (500) jointly supply energy, including: a mode in which the energy storage container (100) and the energy control host (500) jointly supply cooling to the heat exchanger (400) and a mode in which the energy storage container (100) and the energy control host (500) jointly supply heating to the heat exchanger (400).

13. The control method according to claim 12, characterized in that: The energy storage container (100) also includes a temperature adjustment mode in the independent energy supply mode, including: When it is monitored that the difference between the outlet water temperature T2 of the energy storage container (100) and the inlet water temperature T3 of the heat exchanger (400) exceeds a first preset threshold range, the seventh valve (61) is opened, the sixth pipeline (6) is connected, and the return water of the heat exchanger (400) is used to adjust the temperature of the water entering the heat exchanger (400); Wherein, when the energy storage container (100) alone provides cooling, T2≤T3±a; When the energy storage container (100) provides heat alone, T2≥T3±a, where a is a constant.

14. The control method according to claim 12, characterized in that: The energy storage container (100) also includes an automatic energy storage stop mode in the energy storage mode, including: When it is detected that the difference between the water temperature T4 entering the energy generating host (500) and the phase change temperature T0 of the phase change material (200) is within a second preset threshold range, energy storage is stopped; Among them, T0-b≤T4≤T0+b, and b is a constant.

15. The control method according to claim 12, characterized in that: The energy storage container (100) single energy supply mode and the energy storage container (100) and the energy control host (500) joint energy supply mode also include an automatic energy supply stop mode: When it is monitored that the difference between the outlet water temperature T1 of the heat exchanger (400) and the outlet water temperature T2 of the energy storage container (100) is within a third preset threshold range, energy supply is stopped; Among them, T2-c≤T1≤T2+c, and c is a constant.

16. The control method according to claim 12, characterized in that: The energy storage mode of the energy storage container (100) also includes a mode for adjusting the outlet water temperature of the energy storage host (500), including: Adjusting the outlet water temperature of the energy-generating main unit (500) to T5 until the difference between T5 and the phase change temperature T0 of the phase change material (200) is within a fourth preset threshold range; Among them, T0-d≤T5≤T0+d, and d is a constant.

17. The control method according to claim 12, characterized in that: The energy storage container (100) single energy supply mode and the energy storage container (100) and energy generation host (500) joint energy supply mode also include a water outlet temperature adjustment mode of the heat exchanger (400), including: Adjusting the outlet water temperature T1 of the heat exchanger (400) until the difference between T1 and the phase change temperature T0 of the phase change material (200) is within a fifth preset threshold range; Among them, T0-e≤T1≤T0+e, and e is a constant.

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