An immersion type salt solution phase change heat transfer device for a combined cooling and heating system

Abstract

The application relates to the field of heat exchange equipment, and particularly discloses an immersed salt solution phase change heat exchange device for a cold and heat combined supply system, which comprises a base sheet, heat exchange pipes and branch-shaped radiating fins, the inner channel arranged in the base sheet is used to make the phase change agent and the heat exchange agent have a larger contact area, the heat exchange efficiency is improved, and then the freezing and thawing efficiencies are improved; meanwhile, the spray holes arranged on the surface of the base sheet and communicated with the inner channel are used, the phase change agent liquid flow generates a spraying liquid flow through the spray holes, the heat exchange efficiency is improved, the crystallization of the phase change agent on the surface of the heat exchange pipe is reduced, the freezing and thawing speeds are accelerated, the first heat exchange equipment and the second heat exchange equipment with the same structure are arranged, freezing heat supply work and thawing cold supply work are carried out according to the freezing state, the circulation flow efficiency of the phase change agent and the heat exchange agent is improved, the demand for simultaneous cold supply and heat supply is met, and the stability of energy supply is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat exchange equipment, more particularly to an immersed salt solution phase change heat exchange device for a combined cooling and heating system. BACKGROUND

[0002] In energy supply systems, heat exchange devices play a crucial role. Among them, immersed heat exchangers, as a device that directly places the heat exchanger in the heat exchange medium, exhibit multiple advantages such as high-efficiency heat exchange, simple structure, and high adaptability. Phase change heat exchange technology, on the other hand, achieves efficient heat management by cleverly utilizing the phase change characteristics of materials during state transitions such as solid-liquid and liquid-gas.

[0003] The existing phase change heat exchange device for a combined cooling and heating system often faces a challenge during operation: the phase change solution is prone to crystallization on the surface of the heat exchanger. This crystallization phenomenon hinders the effective transfer of heat, as the crystalline layer reduces the heat exchange efficiency between the heat exchanger and the phase change solution that has not undergone phase change. The basic principle of phase change heat exchange is to utilize the property of substances to absorb or release a large amount of heat during phase change (such as solid to liquid, or liquid to gas) to achieve efficient heat management. However, once the phase change solution crystallizes on the surface of the heat exchanger, this solid barrier hinders the smooth transfer of heat, resulting in a significant decrease in overall phase change heat exchange efficiency. SUMMARY

[0004] In view of the problems existing in the prior art, the purpose of the present application is to provide an immersed salt solution phase change heat exchange device for a combined cooling and heating system, which can reduce the crystallization phenomenon on the surface of the heat exchanger during phase change heat exchange.

[0005] To solve the above problems, the present application adopts the following technical solutions.

[0006] An immersed salt solution phase change heat exchange device for a combined cooling and heating system, comprising a first heat exchange device and a second heat exchange device with the same structure, both the first heat exchange device and the second heat exchange device comprising a heat exchange box, a plurality of linear equidistantly arranged dendritic fins inside the heat exchange box, and a spray pipe arranged above the plurality of dendritic fins; the dendritic fin comprising a base sheet and two pairs of heat exchange pipes fixed on the side walls of the base sheet on both sides, the inside of the base sheet being provided with a snakelike internal passage, the upper end of the base sheet being fixedly connected with a filling pipe in communication with the internal passage, both the filling pipe and the spray pipe being in communication with a phase change agent supply mechanism, the lower end of the base sheet being fixedly connected with a discharge pipe in communication with the inner cavity of the heat exchange box; the two pairs of heat exchange pipes on the same side of the base sheet are both distributed in a snakelike manner and are mirror-symmetric to each other, the projections of the heat exchange pipes and the internal passage in the base sheet are distributed in a staggered manner, a plurality of spray holes penetrating the internal passage are provided on the base sheet, the spray holes are uniformly distributed in the bending gaps of the heat exchange pipes, and the upper and lower ends of the heat exchange pipes are in communication with the phase change agent supply mechanism.

[0007] As a further scheme of the present application, the phase change agent supply mechanism comprises a liquid storage tank, the liquid storage tank stores phase change agent, the liquid storage tank is communicated with a second delivery pump through a pipeline, the second delivery pump is communicated with a phase change agent inlet manifold, the phase change agent inlet manifold is communicated with two phase change agent inlet branch pipes, and the fifth electromagnetic valve and the sixth electromagnetic valve are respectively arranged on the two phase change agent inlet branch pipes, one of the two phase change agent inlet branch pipes is communicated with the spray pipe and the filling pipe in the first heat exchange device, and the other of the two phase change agent inlet branch pipes is communicated with the spray pipe and the filling pipe of the second heat exchange device.

[0008] As a further scheme of the present application, the phase change agent supply mechanism comprises a liquid storage tank, the liquid storage tank stores phase change agent, the liquid storage tank is communicated with a second delivery pump through a pipeline, the second delivery pump is communicated with a phase change agent inlet manifold, the phase change agent inlet manifold is communicated with two phase change agent inlet branch pipes, and the fifth electromagnetic valve and the sixth electromagnetic valve are respectively arranged on the two phase change agent inlet branch pipes, one of the two phase change agent inlet branch pipes is communicated with the spray pipe and the filling pipe in the first heat exchange device, and the other of the two phase change agent inlet branch pipes is communicated with the spray pipe and the filling pipe of the second heat exchange device.

[0009] As a further scheme of the present application, the phase change agent supply mechanism comprises a liquid storage tank, the liquid storage tank stores phase change agent, the liquid storage tank is communicated with a second delivery pump through a pipeline, the second delivery pump is communicated with a phase change agent inlet manifold, the phase change agent inlet manifold is communicated with two phase change agent inlet branch pipes, and the fifth electromagnetic valve and the sixth electromagnetic valve are respectively arranged on the two phase change agent inlet branch pipes, one of the two phase change agent inlet branch pipes is communicated with the spray pipe and the filling pipe in the first heat exchange device, and the other of the two phase change agent inlet branch pipes is communicated with the spray pipe and the filling pipe of the second heat exchange device.

[0010] As a further scheme of the present application, the phase change agent supply mechanism comprises a liquid storage tank, the liquid storage tank stores phase change agent, the liquid storage tank is communicated with a second delivery pump through a pipeline, the second delivery pump is communicated with a phase change agent inlet manifold, the phase change agent inlet manifold is communicated with two phase change agent inlet branch pipes, and the fifth electromagnetic valve and the sixth electromagnetic valve are respectively arranged on the two phase change agent inlet branch pipes, one of the two phase change agent inlet branch pipes is communicated with the spray pipe and the filling pipe in the first heat exchange device, and the other of the two phase change agent inlet branch pipes is communicated with the spray pipe and the filling pipe of the second heat exchange device.

[0011] As a further scheme of the present application, the phase change agent supply mechanism comprises a liquid storage tank, the liquid storage tank stores phase change agent, the liquid storage tank is communicated with a second delivery pump through a pipeline, the second delivery pump is communicated with a phase change agent inlet manifold, the phase change agent inlet manifold is communicated with two phase change agent inlet branch pipes, and the fifth electromagnetic valve and the sixth electromagnetic valve are respectively arranged on the two phase change agent inlet branch pipes, one of the two phase change agent inlet branch pipes is communicated with the spray pipe and the filling pipe in the first heat exchange device, and the other of the two phase change agent inlet branch pipes is communicated with the spray pipe and the filling pipe of the second heat exchange device.

[0012] As a further scheme of the present application, the number of the back nozzles is multiple and distributed in a reflection shape on the circumferential side wall of the piston column.

[0013] As a further scheme of the present application, the piston column comprises a frustum abutting against the outer wall of the base sheet, the frustum is fixedly connected with a sliding table extending into the nozzle, the liquid inlet cavity is arranged in the sliding table, the sliding table is in a stepped circular table shape, the first spring is sleeved on the sliding table, the sliding table is slidably connected with the limiting disc, and the limiting disc is provided with a through hole for the sliding of the sliding table.

[0014] As a further scheme of the present application, the outer end of the frustum is fixedly connected with a prismatic cone, the inner wall of the heat exchange box is fixedly connected with a plurality of first flow guide plates facing the branch-shaped radiating fins, a plurality of vertically arranged second flow guide plates are arranged between adjacent branch-shaped radiating fins, and the second flow guide plates are in an inverted V shape.

[0015] According to the application, the immersion type salt solution phase change heat exchange device for a combined cooling heating and power system comprises the following steps in use:

[0016] Step one, the first heat exchange device performs freezing heating operation, the first conveying pump and the second conveying pump are started, and the first electromagnetic valve, the third electromagnetic valve and the fifth electromagnetic valve are opened; the phase change agent is injected into the heat exchange box of the first heat exchange device and infiltrates the branch-shaped radiating fins, and the heat exchange agent is injected into the heat exchange pipe to exchange heat with the phase change agent, so that the phase change agent in the heat exchange box of the first heat exchange device is frozen, and the heat exchange agent supplies heat to the heating unit;

[0017] Step two, the first heat exchange device performs thawing operation and cooling operation, and the second heat exchange device performs freezing operation; when the first heat exchange device is frozen, the first electromagnetic valve and the third electromagnetic valve are closed, and the seventh electromagnetic valve, the third conveying pump and the tenth electromagnetic valve are started, the phase change agent with higher temperature in the liquid storage tank is injected into the first heat exchange device to impact and thaw the frozen block in the heat exchange box of the first heat exchange device; when the thawing is completed to form ice slurry, the tenth electromagnetic valve is closed and the ninth electromagnetic valve is opened, so that the ice slurry is injected into the cooling unit to perform cooling operation; when the first heat exchange device is frozen, the second heat exchange device is frozen, the second electromagnetic valve and the fourth electromagnetic valve and the first conveying pump are started, the heat exchange agent is injected into the heat exchange pipe in the second heat exchange device; and the sixth electromagnetic valve and the second conveying pump are started, the phase change agent is injected into the heat exchange box of the second heat exchange device, so that the second heat exchange device performs freezing operation;

[0018] Step three, when the second heat exchange equipment completes freezing and the first heat exchange equipment completes the defrosting cooling operation, the second heat exchange equipment is defrosted and cooled; when the second heat exchange equipment is defrosted, the eighth electromagnetic valve is closed, and the second conveying pump, the sixth electromagnetic valve and the tenth electromagnetic valve are opened, after defrosting, the tenth electromagnetic valve is closed and the ninth electromagnetic valve is opened, and the cooling operation is carried out;

[0019] Step four, repeat steps one to three, according to the freezing state of the first heat exchange equipment and the second heat exchange equipment, the freezing heating operation and the defrosting cooling operation are alternately carried out.

[0020] Compared with the prior art, the advantages of the present application are:

[0021] (1) The present application comprises a base sheet, a heat exchange pipe and a branch-shaped heat sink, the inner channel arranged in the base sheet makes the phase change agent and the heat exchange agent have a larger contact area, improves the heat exchange efficiency, and further improves the freezing and defrosting efficiency, at the same time, the spray hole arranged on the surface of the base sheet and communicated with the inner channel, the phase change agent liquid flow generates a spray flow through the spray hole, not only improves the heat exchange efficiency, but also reduces the crystallization of the phase change agent on the surface of the heat exchange pipe, and accelerates the freezing and defrosting speed.

[0022] (2) The present application is provided with the first heat exchange equipment and the second heat exchange equipment with the same structure, the freezing heating operation and the defrosting cooling operation are carried out according to the freezing state, the circulation efficiency of the phase change agent and the heat exchange agent is improved, the demand for simultaneous cooling and heating is met, and the stability of energy supply is improved.

[0023] (3) The present application is provided with a pressure valve assembly, so that the phase change agent fluid injected into the inner channel through the filling pipe has a larger pressure, the spray pressure of the phase change agent fluid sprayed from the spray hole is improved, the removal effect of the phase change agent fluid on the ice crystals on the surface of the base sheet and the heat exchange pipe is improved, and the heat exchange efficiency during freezing and the defrosting efficiency during defrosting are improved.

[0024] (4) The present application is provided with a pressure plug assembly to keep the spray pressure of each spray hole on the base sheet consistent, improve the uniformity of freezing and heat exchange, and increase the contact time of the phase change agent with the base sheet by using the back spray hole, further improve the heat exchange effect and the ice crystal removal effect, and accelerate the crushing of the frozen block by the cooperation of the prismatic cone and the flow guide plate of the pressure plug assembly, and improve the formation speed of the ice slurry. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The schematic diagram of the pipeline connection of the present application is shown in the figure;

[0026] Figure 2 The internal structure of the heat exchange box in the present application is shown in the figure;

[0027] Figure 3It is the schematic diagram of the three-dimensional structure of the branch-shaped heat dissipation fin in the application;

[0028] Figure 4 It is the schematic diagram of the sectional structure of the branch-shaped heat dissipation fin in the application;

[0029] Figure 5 It is the schematic diagram of the installation of the pressure valve assembly and the pressure plug assembly in the heat exchange box in the application;

[0030] Figure 6 It is the schematic diagram of the sectional structure of the pressure plug assembly in the application; Figure 5 It is the schematic diagram of the enlarged structure at A in the application;

[0031] Figure 7 It is the schematic diagram of the three-dimensional structure of the pressure plug assembly in the application;

[0032] Figure 8 It is the schematic diagram of the installation of the pressure plug assembly on the branch-column-shaped heat dissipation fin in the application;

[0033] Figure 9 It is the schematic diagram of the sectional structure of the pressure plug assembly in the application; Figure 5 It is the schematic diagram of the enlarged structure at B in the application;

[0034] Figure 10 It is the schematic diagram of the three-dimensional exploded structure of the pressure valve assembly in the application.

[0035] Explanation of the reference numerals in the figure: 1, heat exchange box; 2, branch-shaped heat dissipation fin; 201, base sheet; 202, inner channel; 203, spray hole; 3, heat exchange pipe; 4, heat exchange agent inlet branch pipe; 5, first electromagnetic valve; 6, second electromagnetic valve; 7, heat exchange agent inlet main pipe; 8, first conveying pump; 9, heat supply unit; 10, heat exchange agent outlet branch pipe; 11, third electromagnetic valve; 12, fourth electromagnetic valve; 13, heat exchange agent outlet main pipe; 14, filling pipe; 15, phase change agent inlet branch pipe; 16, spray pipe; 17, phase change agent inlet main pipe; 18, fifth electromagnetic valve; 19, sixth electromagnetic valve; 20, second conveying pump; 21, phase change agent outlet branch pipe; 22, phase change agent outlet main pipe; 23, seventh electromagnetic valve; 24, eighth electromagnetic valve; 25, third conveying pump; 26, return main pipe; 27, first return branch pipe; 28, ninth electromagnetic valve; 29, second return branch pipe; 30, tenth electromagnetic valve; 31, cold supply unit; 32, third return branch pipe; 33, liquid storage tank; 34, discharge pipe; 35, limiting disc; 36, piston column; 3601, conical frustum; 3602, sliding table; 3603, inlet cavity; 3604, reverse spray hole; 3605, prismatic cone; 37, first spring; 38, movable core rod; 39, support frame; 40, flow guide ring; 41, second spring; 42, first flow guide plate; 43, second flow guide plate. DETAILED DESCRIPTION

[0036] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below; obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application, and all other embodiments obtained by a person of ordinary skill in the art without creative effort based on the embodiments in the present application shall fall within the protection scope of the present application.

[0037] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be understood broadly, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be internal communication of two elements. For a person of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0039] Please refer to Figures 1-4 In an embodiment of the present application, an immersion type salt solution phase change heat exchange device for a combined cooling heating and power system, comprising first and second heat exchange devices of the same structure, the first and second heat exchange devices each comprising a heat exchange box 1, the heat exchange box 1 being provided with a plurality of linear equidistantly arranged branch-shaped radiating fins 2 and a spray pipe 16 arranged above the plurality of branch-shaped radiating fins 2;

[0040] The branch-shaped heat dissipation fin 2 comprises a base sheet 201 and two pairs of heat exchange pipes 3 fixed on the side walls on both sides of the base sheet 201, the inside of the base sheet 201 is provided with a serpentine-shaped inner channel 202, the upper end of the base sheet 201 is fixedly connected with a filling pipe 14 which is in communication with the inner channel 202, the filling pipe 14 and a spraying pipe 16 are both in communication with a phase change agent supply mechanism, the lower end of the base sheet 201 is fixedly connected with a discharge pipe 34 which is in communication with the inner cavity of the heat exchange box 1; the two heat exchange pipes 3 on the same side of the base sheet 201 are both distributed in a serpentine shape and are mirror-symmetric to each other, the projections of the heat exchange pipes 3 and the inner channel 202 in the base sheet 201 are distributed in an interlaced manner, a plurality of spray holes 203 which penetrate through the inner channel 202 are formed on the base sheet 201, the spray holes 203 are uniformly distributed in the bending clearance of the heat exchange pipes 3, and the upper end and the lower end of the heat exchange pipes 3 are both in communication with the heat exchange agent supply mechanism.

[0041] Specifically, when the cold and hot sources are supplied, the phase change agent supply mechanism sprays the phase change agent onto the branch-shaped heat dissipation fin 2 through the spraying pipe 16, and the heat exchange agent supply mechanism injects the heat exchange agent into the heat exchange pipes 3, the heat exchange agent flowing through the heat exchange pipes 3 exchanges heat with the phase change agent sprayed on the outer shell of the heat exchange pipes 3, the heat exchange area is increased by the base sheet 201 in contact with the heat exchange pipes 3, and the heat exchange efficiency is improved; in addition, the phase change agent supply mechanism injects the phase change agent into the inner channel 202 of the branch-shaped heat dissipation fin 2 through the filling pipe 14, the phase change agent constantly flows in the inner channel 202 of the base sheet 201, the temperature of the base sheet 201 is more uniform, the heat exchange efficiency is further improved, and in addition, the phase change agent is sprayed from the surface of the base sheet 201 through the spray holes 203 in communication with the inner channel 202 to blow the heat exchange pipes 3, the crystallization on the surface of the heat exchange pipes 3 and the base sheet 201 is reduced, and the influence of the crystallization on the surface of the base sheet 201 and the heat exchange pipes 3 on the heat exchange efficiency is reduced.

[0042] Please refer to Figure 1 The phase change agent supply mechanism comprises a liquid storage tank 33, the liquid storage tank 33 stores the phase change agent, the liquid storage tank 33 is in communication with a second delivery pump 20 through a pipeline, the second delivery pump 20 is in communication with a phase change agent inlet main pipe 17, the phase change agent inlet main pipe 17 is in communication with two phase change agent inlet branch pipes 15, and the fifth electromagnetic valve 18 and the sixth electromagnetic valve 19 are respectively installed on the two phase change agent inlet branch pipes 15, one of the two phase change agent inlet branch pipes 15 is in communication with the spraying pipe 16 and the filling pipe 14 in the first heat exchange equipment, and the other phase change agent inlet branch pipe 15 is in communication with the spraying pipe 16 and the filling pipe 14 of the second heat exchange equipment.

[0043] Specifically, when heat exchange needs to be performed in the first heat exchange equipment, the fifth electromagnetic valve 18 and the second delivery pump 20 are started to inject the phase change agent into the heat exchange box 1 of the first heat exchange equipment; when heat exchange needs to be performed in the heat exchange box 1 of the second heat exchange equipment, the second delivery pump 20 and the sixth electromagnetic valve 19 are started to inject the phase change agent into the heat exchange box 1 of the second heat exchange equipment.

[0044] Please refer to Figure 1 , the phase change agent outlet branch pipes 21 are communicated with the heat exchange boxes 1 of both the first heat exchange device and the second heat exchange device, the two phase change agent outlet branch pipes 21 are communicated with the same phase change agent outlet main pipe 22 and the communication positions are respectively provided with the seventh electromagnetic valve 23 and the eighth electromagnetic valve 24, the phase change agent outlet main pipe 22 is communicated with the third conveying pump 25, the third conveying pump 25 is communicated with the return main pipe 26, the return main pipe 26 is respectively communicated with the first return branch pipe 27 and the second return branch pipe 29 and the communication positions are respectively provided with the ninth electromagnetic valve 28 and the tenth electromagnetic valve 30; the first return branch pipe 27 is communicated with the cooling unit 31, the cooling unit 31 is communicated with the liquid storage tank 33 through the third return branch pipe 32, and the second return branch pipe 29 is communicated with the liquid storage tank 33.

[0045] Specifically, when the frozen salt solution in the heat exchange box 1 corresponding to the first heat exchange device needs to be thawed, the second conveying pump 20 and the fifth electromagnetic valve 18 are started, and the third conveying pump 25, the seventh electromagnetic valve 23 and the tenth electromagnetic valve 30 are started at the same time; when the heat exchange box 1 of the first heat exchange device is thawed and cooling operation is needed, the seventh electromagnetic valve 23, the ninth electromagnetic valve 28 and the third conveying pump 25 are started, and the ice slurry in the heat exchange box 1 is injected into the cooling unit 31 through the third conveying pump 25.

[0046] Please refer to Figure 1 , the heat exchange agent supply mechanism includes the heating unit 9, the outlet end of the heating unit 9 is communicated with the heat exchange agent inlet main pipe 7, the heat exchange agent inlet main pipe 7 is respectively communicated with a pair of heat exchange agent inlet branch pipes 4 and the communication positions are respectively provided with the first electromagnetic valve 5 and the second electromagnetic valve 6, one of the heat exchange agent inlet branch pipes 4 is communicated with the heat exchange pipe 3 in the first heat exchange device, and the other heat exchange agent inlet branch pipe 4 is communicated with the heat exchange pipe 3 in the second heat exchange device; the lower ends of the heat exchange pipes 3 in the first heat exchange device and the second heat exchange device are respectively communicated with heat exchange agent outlet branch pipes 10, the two heat exchange agent outlet branch pipes 10 are communicated with the same heat exchange agent outlet main pipe 13 and the communication positions are respectively provided with the third electromagnetic valve 11 and the fourth electromagnetic valve 12, and the heat exchange agent outlet main pipe 13 is communicated with the inlet end of the heating unit 9.

[0047] Specifically, when the heat exchange agent needs to be injected into the first heat exchange device, the first conveying pump 8, the first electromagnetic valve 5 and the third electromagnetic valve 11 are started; when the heat exchange agent needs to be injected into the second heat exchange device, the first conveying pump 8, the second electromagnetic valve 6 and the fourth electromagnetic valve 12 are started.

[0048] When the heating and cooling operation is performed, please refer to Figure 1 , the following steps are included:

[0049] Step one, the first heat exchange equipment carries out freezing heat supply operation, starts the first conveying pump 8 and the second conveying pump 20, and opens the first electromagnetic valve 5, the third electromagnetic valve 11 and the fifth electromagnetic valve 18; the phase change agent is injected into the heat exchange box 1 of the first heat exchange equipment and infiltrates the branch-shaped radiating fin 2, and the heat exchange agent is injected into the heat exchange pipe 3 to exchange heat with the phase change agent, so that the phase change agent in the heat exchange box 1 of the first heat exchange equipment freezes, and the heat exchange agent supplies heat to the heat supply unit 9;

[0050] Specifically, the heat exchange agent after heat exchange returns to the heat supply unit 9 to carry out heat supply operation;

[0051] Step two, the first heat exchange equipment carries out thawing operation and cooling supply operation, and the second heat exchange equipment carries out freezing operation; when the first heat exchange equipment freezes, the first electromagnetic valve 5 and the third electromagnetic valve 11 are closed, and the seventh electromagnetic valve 23, the third conveying pump 25 and the tenth electromagnetic valve 30 are started, the phase change agent with higher temperature in the liquid storage tank 33 is injected into the first heat exchange equipment to impact and thaw the frozen block in the heat exchange box 1 of the first heat exchange equipment;

[0052] When the thawing is completed to form ice slurry, the tenth electromagnetic valve 30 is closed and the ninth electromagnetic valve 28 is opened, so that the ice slurry is injected into the cooling unit 31 to carry out cooling operation;

[0053] When the first heat exchange equipment freezes, the second heat exchange equipment carries out freezing operation, the second electromagnetic valve 6 and the fourth electromagnetic valve 12 and the first conveying pump 8 are started, and the heat exchange agent is injected into the heat exchange pipe 3 in the second heat exchange equipment; and the sixth electromagnetic valve 19 and the second conveying pump 20 are started, and the phase change agent is injected into the heat exchange box 1 of the second heat exchange equipment, so that the second heat exchange equipment carries out freezing operation;

[0054] Specifically, the phase change agent with higher temperature in the liquid storage tank 33 is used to thaw the frozen block in the first heat exchange equipment after freezing, and the thawed ice slurry is injected into the cooling unit 31 to carry out cooling operation; at the same time, the second heat exchange equipment carries out freezing operation, and the heat exchange equipment freezes the heat of the second heat exchange equipment to the heat supply unit 9 to carry out heat supply, and carries out cooling and heat supply operation at the same time;

[0055] Step three, when the second heat exchange equipment completes freezing and the first heat exchange equipment completes thawing and cooling supply operation, the second heat exchange equipment carries out thawing operation and cooling supply operation; when the second heat exchange equipment carries out thawing operation, the eighth electromagnetic valve 24 is closed, and the second conveying pump 20, the sixth electromagnetic valve 19 and the tenth electromagnetic valve 30 are opened, after thawing is completed, the tenth electromagnetic valve 30 is closed and the ninth electromagnetic valve 28 is opened, and cooling operation is carried out;

[0056] Step four, steps one to three are repeated, and according to the freezing state of the first heat exchange equipment and the second heat exchange equipment, freezing heat supply operation and thawing cooling supply operation are alternately carried out.

[0057] Need to explain, phase change agent uses low temperature salt solution, heat transfer agent uses glycol solution.

[0058] Compared with the traditional heat and cold supply system, the application is provided with the first heat exchange device and the second heat exchange device with the same structure, the freezing heating operation and the thawing cooling operation are carried out according to the freezing state, the circulation flow efficiency of the phase change agent and the heat transfer agent is improved, the demand for simultaneous cooling and heating is met, and the stability of energy supply is improved.

[0059] In another embodiment of the application, please refer to Figure 5 、 Figure 9 and Figure 10 , the discharge pipe 34 is provided with a pressure valve assembly, the pressure valve assembly comprises a flow guide ring 40 fixedly connected with the inner wall of the discharge pipe 34, the lower end of the flow guide ring 40 abuts against a movable core rod 38 used for blocking the flow guide ring 40, the lower end of the movable core rod 38 is slidably connected with a support frame 39, and the upper side of the support frame 39 abuts against a second spring 41 sleeved on the movable core rod 38.

[0060] Specifically, by arranging the pressure valve assembly at the lower end of the discharge pipe 34, the phase change agent fluid injected into the inner channel 202 through the filling pipe 14 has greater pressure, the injection pressure of the phase change agent fluid sprayed from the spray hole 203 is improved, the removal effect of the phase change agent fluid on the ice crystals on the surface of the substrate 201 and the heat exchange pipe 3 is improved, and the heat exchange efficiency during freezing and the thawing efficiency during thawing are improved.

[0061] Please refer to Figures 6-8 , the spray hole 203 is provided with a pressure plug assembly, the pressure plug assembly comprises a limiting disc 35 fixedly connected with the inner wall of the spray hole 203, the limiting disc 35 penetrates a piston column 36 extending to the outside of the spray hole 203, the piston column 36 is provided with a liquid inlet cavity 3603 on the side facing the inner channel 202, the piston column 36 is provided with a reverse spray hole 3604 opposite to the limiting disc 35 and communicating with the liquid inlet cavity 3603, and the piston column 36 is sleeved with a first spring 37 abutting against the limiting disc 35 on the inner side of the spray hole 203, and the first spring 37 makes the reverse spray hole 3604 on the piston column 36 opposite to the limiting disc 35 when it is not subjected to external force.

[0062] Specifically, by arranging the pressure plug assembly, the spray hole 203 is in a closed state when there is no phase change agent flow in the inner channel 202, and the injection pressure of each spray hole 203 on the substrate 201 is kept consistent, thereby improving the uniformity of freezing and heat exchange.

[0063] Please refer to Figure 6 and Figure 7The number of the reverse spray holes 3604 is multiple and the reverse spray holes 3604 are distributed on the circumferential side wall of the piston column 36 in a reflection shape.

[0064] Specifically, when the piston column 36 drives the reverse spray holes 3604 to move to the outside of the spray hole 203, the phase change agent fluid is sprayed to the surface of the substrate 201 and the heat exchange pipe 3 in a reverse direction, further reduces the crystallization of the surface of the branch-shaped fin 2, and improves the thawing efficiency.

[0065] Referring to Figure 6 and Figure 7 The piston column 36 includes a frustum 3601 abutting against the outer wall of the substrate 201, the frustum 3601 is fixedly connected with a sliding table 3602 extending into the spray hole 203, a liquid inlet cavity 3603 is arranged in the sliding table 3602, the sliding table 3602 is in a stepped circular table shape, a first spring 37 is sleeved on the sliding table 3602, the sliding table 3602 is slidingly connected with a limiting disc 35, and the limiting disc 35 is provided with a through hole for sliding of the sliding table 3602.

[0066] Specifically, the limiting of the piston column 36 is realized by the limiting disc 35 and the first spring 37, and the spraying of the phase change agent is realized by the liquid inlet cavity 3603 and the reverse spray holes 3604.

[0067] Referring to Figure 7 The outer end of the frustum 3601 is fixedly connected with a prismatic cone 3605, a plurality of first flow guide plates 42 are fixedly connected to the inner wall of the heat exchange box 1 and face the branch-shaped fins 2, a plurality of second flow guide plates 43 vertically arranged are arranged between adjacent branch-shaped fins 2 and are fixedly connected to the inner wall of the heat exchange box 1, and the second flow guide plates 43 are in an inverted V shape.

[0068] Specifically, during thawing, the first flow guide plates 42 and the second flow guide plates 43 make the thawing blocks fall towards the branch-shaped fins 2, accelerate the thawing of the frozen blocks, and accelerate the breaking of the frozen blocks through the prismatic cone 3605, thereby improving the thawing efficiency.

[0069] The above merely describes the preferred embodiments of the present application; however, the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent substitutions or changes to the technical solutions of the present application and the improved concepts thereof within the technical scope disclosed by the present application, which should be covered by the protection scope of the present application.

Claims

1. An immersion-type salt solution phase change heat exchange device for a combined cooling and heating system, characterized in that, The first and second heat exchange devices have the same structure. Both the first and second heat exchange devices include a heat exchange box (1). The heat exchange box (1) is provided with a plurality of linearly equidistant dendritic heat sinks (2) and a spray pipe (16) set above the plurality of dendritic heat sinks (2). The dendritic heat sinks (2) include a substrate (201) and two pairs of heat exchange pipes (3) fixed on the side walls of both sides of the substrate (201). The substrate (201) has a serpentine inner channel (202) inside. The upper end of the substrate (201) is fixedly connected to a filling pipe (14) communicating with the inner channel (202). The filling pipe (14) and the spray pipe (16) are connected to the inner channel (202). Both the spray pipe (16) and the heat exchanger supply mechanism are connected. The lower end of the substrate (201) is fixedly connected to the discharge pipe (34), which is connected to the inner cavity of the heat exchange box (1). A pair of heat exchange tubes (3) located on the same side of the substrate (201) are arranged in a serpentine pattern and are mirror symmetrical. The projections of the heat exchange tubes (3) and the inner channel (202) in the substrate (201) are interspersed. Multiple nozzles (203) penetrating the inner channel (202) are opened on the substrate (201). The nozzles (203) are evenly distributed in the bending gap of the heat exchange tubes (3). The upper and lower ends of the heat exchange tubes (3) are connected to the heat exchanger supply mechanism.

2. The immersion salt solution phase change heat exchange device for a combined cooling and heating system according to claim 1, characterized in that, The phase change agent supply mechanism includes a storage tank (33) containing a phase change agent. The storage tank (33) is connected to a second delivery pump (20) via a pipeline. The second delivery pump (20) is connected to a phase change agent inlet main pipe (17). The phase change agent inlet main pipe (17) is connected to two phase change agent inlet branch pipes (15). A fifth solenoid valve (18) and a sixth solenoid valve (19) are installed on the two phase change agent inlet branch pipes (15). One phase change agent inlet branch pipe (15) is connected to the spray pipe (16) and the filling pipe (14) in the first heat exchange equipment. The other phase change agent inlet branch pipe (15) is connected to the spray pipe (16) and the filling pipe (14) in the second heat exchange equipment.

3. The immersion salt solution phase change heat exchange device for a combined cooling and heating system according to claim 2, characterized in that, Both the first heat exchanger and the second heat exchanger have a phase change agent outlet branch pipe (21) connected to the bottom of their heat exchange boxes (1). The two phase change agent outlet branch pipes (21) are connected to the same phase change agent outlet main pipe (22), and the connection points are respectively equipped with a seventh solenoid valve (23) and an eighth solenoid valve (24). The phase change agent outlet main pipe (22) is connected to a third delivery pump (25), and the third delivery pump (25) is connected to a return main pipe (26). The return main pipe (26) is connected to a first return branch pipe (27) and a second return branch pipe (29), and the connection points are respectively equipped with a ninth solenoid valve (28) and a tenth solenoid valve (30). The first return branch pipe (27) is connected to a cooling unit (31), and the cooling unit (31) is connected to a storage tank (33) through the third return branch pipe (32). The second return branch pipe (29) is connected to the storage tank (33).

4. The immersion salt solution phase change heat transfer device for a combined cooling and heating system according to claim 3, characterized in that, The heat exchanger supply mechanism includes a heating unit (9), the outlet end of the heating unit (9) is connected to a heat exchanger inlet main pipe (7), the heat exchanger inlet main pipe (7) is connected to a pair of heat exchanger inlet branch pipes (4) respectively, and the connection points are equipped with a first solenoid valve (5) and a second solenoid valve (6) respectively. One heat exchanger inlet branch pipe (4) is connected to the heat exchanger tube (3) in the first heat exchange equipment, and the other heat exchanger inlet branch pipe (4) is connected to the heat exchanger tube (3) in the second heat exchange equipment. The lower ends of the heat exchanger tubes (3) in the first heat exchange equipment and the second heat exchange equipment are respectively connected to heat exchanger outlet branch pipes (10), the two heat exchanger outlet branch pipes (10) are connected to the same heat exchanger outlet main pipe (13), and the connection points are respectively equipped with a third solenoid valve (11) and a fourth solenoid valve (12). The heat exchanger outlet main pipe (13) is connected to the inlet end of the heating unit (9).

5. The immersion salt solution phase change heat exchange device for a combined cooling and heating system according to claim 1, characterized in that, The discharge pipe (34) is provided with a pressure valve assembly, which includes a guide ring (40) fixedly connected to the inner wall of the discharge pipe (34). The lower end of the guide ring (40) abuts against a movable core rod (38) used to block the guide ring (40). The lower end of the movable core rod (38) is slidably connected to a support frame (39). The upper part of the support frame (39) abuts against a second spring (41) sleeved on the movable core rod (38).

6. The immersion salt solution phase change heat exchange device for a combined cooling and heating system according to claim 5, characterized in that, The nozzle (203) is provided with a pressure plug assembly, which includes a limiting plate (35) fixedly connected to the inner wall of the nozzle (203). The limiting plate (35) has a piston column (36) extending to the outside of the nozzle (203). The piston column (36) has an inlet chamber (3603) on the side facing the inner channel (202). The piston column (36) has a back spray hole (3604) that is opposite to the limiting plate (35) and communicates with the inlet chamber (3603). The piston column (36) located inside the nozzle (203) is fitted with a first spring (37) that abuts against the limiting plate (35). The first spring (37) makes the back spray hole (3604) on the piston column (36) opposite to the limiting plate (35) when it is not subjected to external force.

7. An immersion salt solution phase change heat exchange device for a combined cooling and heating system according to claim 6, characterized in that, The number of back jet holes (3604) is multiple and they are distributed in a reflective manner on the circumferential sidewall of the piston rod (36).

8. An immersion salt solution phase change heat exchange device for a combined cooling and heating system according to claim 6, characterized in that, The piston column (36) includes a cone (3601) that abuts against the outer wall of the substrate (201). The cone (3601) is fixedly connected to a sliding platform (3602) that extends into the nozzle (203). The liquid inlet chamber (3603) is opened in the sliding platform (3602). The sliding platform (3602) is in the shape of a stepped frustum. A first spring (37) is sleeved on the sliding platform (3602). The sliding platform (3602) is slidably connected to the limiting plate (35). The limiting plate (35) has a through hole for the sliding platform (3602) to slide.

9. An immersion salt solution phase change heat exchange device for a combined cooling and heating system according to claim 8, characterized in that, The outer end of the cone (3601) is fixedly connected to a prismatic cone (3605), and the inner wall of the heat exchange box (1) is fixedly connected to a plurality of first guide plates (42) facing the dendritic heat sink (2). Between adjacent dendritic heat sinks (2), there are a plurality of vertically arranged second guide plates (43) fixedly connected to the inner wall of the heat exchange box (1). The second guide plates (43) are in the shape of an inverted V.

10. An immersion salt solution phase change heat exchange device for a combined cooling and heating system according to claim 4, characterized in that, The following steps are included when using it: Step 1: The first heat exchanger performs freezing and heating operation. The first delivery pump (8) and the second delivery pump (20) are started, and the first solenoid valve (5), the third solenoid valve (11), and the fifth solenoid valve (18) are opened. The phase change agent is injected into the heat exchange box (1) of the first heat exchanger and wets the dendritic heat sink (2). At the same time, the heat exchange agent is injected into the heat exchange tube (3) to exchange heat with the phase change agent, so that the phase change agent in the heat exchange box (1) of the first heat exchanger freezes and the heat exchange agent supplies heat to the heating unit (9). Step 2: The first heat exchanger performs thawing and cooling operations, while the second heat exchanger performs freezing operations. When the first heat exchanger freezes, the first solenoid valve (5) and the third solenoid valve (11) are closed, and the seventh solenoid valve (23), the third transfer pump (25), and the tenth solenoid valve (30) are activated to inject the phase change agent with a higher temperature from the storage tank (33) into the first heat exchanger, thereby impacting and thawing the frozen blocks in the heat exchange box (1) of the first heat exchanger. When thawing is complete and ice slurry is formed, the tenth solenoid valve (30) is closed. And open the ninth solenoid valve (28) to allow ice slurry to be injected into the cooling unit (31) for cooling operation; while the first heat exchange equipment freezes, the second heat exchange equipment is frozen at the same time. Start the second solenoid valve (6) and the fourth solenoid valve (12) and the first transfer pump (8) to inject the heat exchange agent into the heat exchange tube (3) in the second heat exchange equipment; and start the sixth solenoid valve (19) and the second transfer pump (20) to inject the phase change agent into the heat exchange box (1) of the second heat exchange equipment, so that the second heat exchange equipment is frozen. Step 3: After the second heat exchanger has finished freezing and the first heat exchanger has finished thawing and cooling, the second heat exchanger is thawed and cooled. When the second heat exchanger is thawed, the eighth solenoid valve (24) is closed and the second delivery pump (20), the sixth solenoid valve (19), and the tenth solenoid valve (30) are opened. After thawing, the tenth solenoid valve (30) is closed and the ninth solenoid valve (28) is opened to perform cooling. Step four: Repeat steps one through three, alternating between freezing heating and thawing cooling operations based on the freezing status of the first and second heat exchangers.

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