Pipeline switching method, device and system under simultaneous supply of cold and heat, electric appliance, storage medium and electronic equipment

Abstract

The invention relates to a pipeline switching method, device and system under simultaneous supply of cold and heat, an electric appliance, a storage medium and electronic equipment, and the method comprises the steps that the first water temperature of water in a water tank of a heat recovery side is obtained, and the heat recovery side is used for recovering heat energy generated in the refrigerating process of a refrigerating unit; according to the first water temperature, connecting modes of the pipeline are switched, the connecting modes at least comprise a first mode and a second mode, in the first mode, the heat recovery side is connected with a refrigerating unit, the refrigerating unit is connected with a cold source side water tank, and the refrigerating unit is used for supplying cold; and in the second mode, the heat recovery side is disconnected from the refrigerating unit, the refrigerating unit is connected with the cooling water pump and the cooling tower, and the refrigerating unit is used for cooling. The technical problem that a cold and heat supply pipeline is not suitable for various environments is solved.

Description

Technical Field

[0001] The present application relates to the field of simultaneous cooling and heating, and in particular to a pipeline switching method, device, system, electrical appliance, storage medium and electronic equipment under simultaneous cooling and heating. Background Art

[0002] Simultaneous heating and cooling is a scenario that requires both heating and cooling. For example, pasteurization of milk requires heating the milk to a certain temperature and then rapidly cooling it. In this scenario, both heating and cooling are required, which is the aforementioned simultaneous heating and cooling scenario.

[0003] Existing simultaneous heating and cooling technologies typically pre-set the connections between the water lines and equipment, then activate the equipment to provide heating and cooling. However, once the water lines and equipment are set up, they are fixed, making them inflexible and unable to adapt to various environments. Summary of the Invention

[0004] The present application provides a pipeline switching method, device, system, electrical appliance, storage medium and electronic equipment under the simultaneous supply of cold and hot water to solve the technical problem that the simultaneous supply of cold and hot water pipelines is not suitable for various environments.

[0005] In the first aspect, the present application provides a pipeline switching method under the simultaneous supply of cold and hot, including: obtaining a first water temperature of the water in the water tank on the heat recovery side, wherein the above-mentioned heat recovery side is used to recover the heat energy generated during the refrigeration process of the refrigeration unit; according to the above-mentioned first water temperature, switching the connection mode of the above-mentioned pipeline, wherein the above-mentioned connection mode includes at least a first mode and a second mode, in the above-mentioned first mode, the above-mentioned heat recovery side is connected to the above-mentioned refrigeration unit, the above-mentioned refrigeration unit is connected to the cold source side water tank, and the above-mentioned refrigeration unit is used for cold supply; in the above-mentioned second mode, the above-mentioned heat recovery side is disconnected from the above-mentioned refrigeration unit and the above-mentioned refrigeration unit is connected to the cooling water pump and the cooling tower, and the above-mentioned refrigeration unit is used for cold supply.

[0006] In the second aspect, the present application provides a pipeline switching device for simultaneous supply of hot and cold water, comprising: an acquisition module for acquiring a first water temperature of water in a water tank on a heat recovery side, wherein the heat recovery side is used to recover heat energy generated during the refrigeration process of the refrigeration unit; a switching module for switching the connection mode of the pipeline according to the first water temperature, wherein the connection mode includes at least a first mode and a second mode, in which, in the first mode, the heat recovery side is connected to the refrigeration unit, the refrigeration unit is connected to the water tank on the cold source side, and the refrigeration unit is used for supplying cold water; in the second mode, the heat recovery side is disconnected from the refrigeration unit and the refrigeration unit is connected to the cooling water pump and the cooling tower, and the refrigeration unit is used for supplying cold water.

[0007] On the third aspect, the present application provides a pipeline switching system for simultaneous supply of hot and cold water, including: a water tank on the heat recovery side, used to recover the heat energy generated during the refrigeration process of the refrigeration unit; a refrigeration unit, used for refrigeration; a cooling tower and a cooling water pump, used for auxiliary refrigeration; pipelines, the above-mentioned pipelines are switched to different connection modes according to the first water temperature of the water in the water tank on the heat recovery side, wherein the above-mentioned connection modes include at least a first mode and a second mode, in the above-mentioned first mode, the above-mentioned heat recovery side is connected to the above-mentioned refrigeration unit, and the above-mentioned refrigeration unit is connected to the water tank on the cold source side; in the above-mentioned second mode, the above-mentioned heat recovery side is disconnected from the above-mentioned refrigeration unit and the above-mentioned refrigeration unit is connected to the cooling water pump and the cooling tower.

[0008] In a fourth aspect, the present application provides an electrical appliance, including the above-mentioned pipeline switching system for simultaneous cold and hot supply.

[0009] In a fifth aspect, the present application provides a pipeline switching device under the simultaneous supply of cold and hot water, comprising: at least one communication interface; at least one bus connected to the above-mentioned at least one communication interface; at least one processor connected to the above-mentioned at least one bus; at least one memory connected to the above-mentioned at least one bus, wherein the above-mentioned processor is configured to execute the pipeline switching method under the simultaneous supply of cold and hot water by executing executable instructions in the memory.

[0010] In a sixth aspect, the present application further provides a computer storage medium storing computer executable instructions, wherein the computer executable instructions are used to execute any of the above-mentioned pipeline switching methods under the simultaneous supply of cold and hot water in the present application.

[0011] The above-mentioned technical solution provided by the embodiment of the present application has the following advantages over the prior art: the method provided by the embodiment of the present application obtains the first water temperature of the water in the water tank on the heat recovery side, wherein the above-mentioned heat recovery side is used to recover the heat energy generated during the refrigeration process of the refrigeration unit; according to the above-mentioned first water temperature, the connection mode of the above-mentioned pipeline is switched, wherein the above-mentioned connection mode includes at least a first mode and a second mode, in the above-mentioned first mode, the above-mentioned heat recovery side is connected to the above-mentioned refrigeration unit, the above-mentioned refrigeration unit is connected to the cold source side water tank, and the above-mentioned refrigeration unit is used for cooling; in the above-mentioned second mode, the above-mentioned heat recovery side is disconnected from the above-mentioned refrigeration unit and the above-mentioned refrigeration unit is connected to the cooling water pump and the cooling tower, and the above-mentioned refrigeration unit is used for cooling, so that the connection mode of the hot and cold supply pipes can be determined according to the water temperature of the water in the water tank on the heat recovery side, so that the hot and cold supply process can flexibly switch the connection mode of the pipes and equipment according to the scenario. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0014] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0015] Figure 1 A flow chart of a pipeline switching method for simultaneous cold and hot supply provided in an embodiment of the present application;

[0016] Figure 2 A schematic diagram of a mode switching provided in an embodiment of the present application;

[0017] Figure 3 A schematic diagram of a pipe connection for simultaneous hot and cold supply provided in an embodiment of the present application;

[0018] Figure 4 A schematic diagram of a control process provided in an embodiment of the present application;

[0019] Figure 5 Another control process diagram provided in an embodiment of the present application;

[0020] Figure 6 A schematic diagram of a first mode provided in an embodiment of the present application;

[0021] Figure 7 A schematic diagram of a second mode provided in an embodiment of the present application;

[0022] Figure 8 A schematic diagram of multiple refrigeration units connected in parallel provided in an embodiment of the present application;

[0023] Figure 9 A schematic diagram of multiple refrigeration units connected in series according to an embodiment of the present application;

[0024] Figure 10 A schematic diagram of a third mode provided in an embodiment of the present application;

[0025] Figure 11 A schematic diagram of a pipeline switching device for simultaneous hot and cold supply provided in an embodiment of the present application;

[0026] Figure 12 A schematic diagram of a pipeline switching device for simultaneous cold and hot supply provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0028] The disclosure below provides many different embodiments or examples for implementing different configurations of the present invention. To simplify the disclosure of the present invention, the components and configurations of specific examples are described below. Of course, these are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or configurations discussed.

[0029] In order to solve the technical problem in the existing technology that the hot and cold supply pipelines are not suitable for various environments, the present application provides a pipeline switching method under the hot and cold supply, which can achieve the effect of flexibly switching the connection method of the pipeline and the equipment according to the scenario during the hot and cold supply process.

[0030] Figure 1 This is a flow chart of a pipeline switching method for simultaneous hot and cold supply provided in an embodiment of the present application, such as Figure 1 Shown, including:

[0031] S102, obtaining a first water temperature of water in a water tank on a heat recovery side, wherein the heat recovery side is used to recover heat energy generated during a refrigeration process of the refrigeration unit;

[0032] S104, according to the first water temperature, switching the connection mode of the pipeline, wherein the connection mode includes at least a first mode and a second mode, in which the heat recovery side is connected to the refrigeration unit, the refrigeration unit is connected to the cold source side water tank, and the refrigeration unit is used for cooling; in the second mode, the heat recovery side is disconnected from the refrigeration unit and the refrigeration unit is connected to the cooling water pump and the cooling tower, and the refrigeration unit is used for cooling.

[0033] Simultaneous heating and cooling is a scenario where both cooling and heating are required. For example, pasteurization of milk requires heating the milk to a certain temperature and then rapidly cooling it. In this scenario, both heating and cooling are required, which is the aforementioned simultaneous heating and cooling scenario.

[0034] For simultaneous heating and cooling, a refrigeration unit can be used. A refrigeration unit is a device used for cooling. For example, after heating milk, the milk can be cooled by the cold air generated by the refrigeration unit. In addition to the refrigeration unit, heat recovery equipment is also required. This heat recovery equipment collects the heat energy generated by the refrigeration unit during the cooling process. This collected heat energy can be used for heating.

[0035] The heat recovery equipment and refrigeration unit can be connected via piping. If the heat recovery equipment and refrigeration unit are connected, the connection mode is the first mode. If the heat recovery equipment and refrigeration unit are not connected, but the refrigeration unit is connected to the cooling water pump and cooling tower via piping, the connection mode is the second mode. The two modes can be automatically switched based on actual conditions. The mode can be automatically switched upon receiving a command, or the mode can be switched based on the water temperature in the water tank of the heat recovery unit.

[0036] For example, Figure 2 This is a schematic diagram of an exemplary refrigeration unit connection. The refrigeration unit is connected to a cold source water tank, supplying cooling to the cold source water tank. The heat generated during the cooling process is supplied to the heat recovery water tank. In this mode, the refrigeration unit is disconnected from the cooling water pump and cooling tower, operating in the first mode. However, if the water temperature in the heat recovery water tank is too high, the refrigeration unit enters the second mode, connecting to the cooling water pump and cooling tower but disconnecting from the heat recovery water tank. Heat recovery is not performed in this mode. Figure 2 The line in the middle represents the water pipe. Figure 2 The structure in the figure is merely an example used to explain the first mode and the second mode, and does not constitute a limitation on the structure of this application.

[0037] In this embodiment, a heat recovery water tank can be configured on the heat recovery side to store heat. The water tank can be divided into a supply tank and a return tank, one for supply and one for return. During heat storage, water from the supply tank is first used for heat storage, with the remaining heat energy stored in the return tank. The water in the supply tank can be used as a heat source to heat the object to be heated, such as milk. The heated water then enters the return tank.

[0038] The refrigeration unit consists of a condenser and an evaporator, which work together to cool the water in the cold source tank. This water can be used to rapidly cool objects, such as milk. The heat generated by the refrigeration unit is stored in the water tank of the heat recovery device.

[0039] The cold source side water tank can also include a supply water tank and a return water tank. The cold water in the supply water tank cools the object and then circulates into the return water tank. When the refrigeration unit is cooling, it cools the water in the supply water tank and the return water tank, so that the cooled water can quickly cool the object.

[0040] In this embodiment, if the heat generated during the refrigeration process of the refrigeration unit does not need to be stored, nor does it need to be stored on the heat recovery side, the refrigeration unit can be connected to a cooling tower and a cooling water pump. In this way, the heat generated during the refrigeration process of the refrigeration unit is offset by the cooling tower and the cooling water pump and is not recovered.

[0041] There are many reasons why the heat generated by the refrigeration process of the refrigeration unit is not recovered. For example, the temperature of the water on the heat recovery side is too high, making it impossible to effectively recover the heat, or the control instruction controls the heat recovery to be not performed.

[0042] The pipelines in this embodiment can be connected through a butterfly valve, and the flow path of water in the pipeline can be controlled by opening and closing the butterfly valve, so that the pipeline and the refrigeration unit, heat recovery module, cooling tower and cooling water pump form a first mode or a second mode connection mode. In the first mode, heat recovery can be performed, and in the second mode, heat recovery is not performed.

[0043] The refrigeration units in this embodiment can be a single unit or multiple units. If multiple units are included, the number of refrigeration units to be activated can be determined based on actual conditions. Each of the multiple refrigeration units is connected to the heat recovery side via a pipeline, and is also connected to the cooling water pump and cooling tower via a pipeline. By controlling the opening and closing of the butterfly valve in the pipeline, the refrigeration equipment of the unit can be controlled to start cooling.

[0044] like Figure 3 As shown, Figure 3 In the refrigeration unit, the condenser and evaporator are Figure 3 The lines in the diagram are pipelines, and the water in the pipelines flows through them. V1 to V14 are butterfly valves, and the flow path of the water in the pipelines can be controlled by opening and closing the butterfly valves. Figure 3 Two refrigeration units are shown, and there can be more refrigeration units. The cold source water pump and the cold source user pump use the cold water in the connected return water tank and supply water tank to provide cold air or cold water to the user. The cold water is cooled and cooled by the refrigeration unit. The heat generated by the refrigeration unit is given to the supply water tank and return water tank connected to the heat recovery circulation pump and the heat recovery user pump. The water tanks are filled with hot water and provide hot water or hot air to the user. The refrigeration unit switches between the first mode and the second mode by opening and closing the butterfly valve, connecting the water tank on the heat recovery side or connecting the cooling water pump to the cooling tower.

[0045] The method provided by the embodiment of the present application obtains a first water temperature of the water in the water tank on the heat recovery side, wherein the heat recovery side is used to recover the heat energy generated during the refrigeration process of the refrigeration unit; according to the first water temperature, the connection mode of the pipeline is switched, wherein the connection mode includes at least a first mode and a second mode. In the first mode, the heat recovery side is connected to the refrigeration unit, the refrigeration unit is connected to the cold source side water tank, and the refrigeration unit is used for cooling; in the second mode, the heat recovery side is disconnected from the refrigeration unit and the refrigeration unit is connected to the cooling water pump and the cooling tower, and the refrigeration unit is used for cooling, so that the connection mode of the hot and cold supply pipes can be determined according to the water temperature of the water in the water tank on the heat recovery side, so that the hot and cold supply process can flexibly switch the connection mode of the pipeline and the equipment according to the scenario.

[0046] In one embodiment, since there are multiple refrigeration units, when starting up, the number of refrigeration units to be started can be determined based on the unit load of the refrigeration unit and the freezing main pipe temperature of the refrigeration unit, and the refrigeration units can be started according to the number of units.

[0047] In this embodiment, since there are multiple refrigeration units, the number of refrigeration units to activate can be determined based on actual conditions. If too many refrigeration units are activated, the cold source may not require sufficient cooling capacity, resulting in a waste of resources. On the other hand, if too few refrigeration units are activated, the cooling pressure and load of each individual refrigeration unit will be high. Therefore, the appropriate number of units can be determined by obtaining the unit load and the main refrigeration pipe temperature. The unit load is the load of each refrigeration unit currently in operation. If the load of an individual unit is too high, more refrigeration units should be activated. If the load of each unit is low, fewer refrigeration units should be activated. If the main refrigeration pipe temperature is too low, it means that too many refrigeration units are activated, and the number of refrigeration units can be reduced. If the main refrigeration pipe temperature is too high, additional refrigeration units should be added. As the number of refrigeration units is adjusted, the load of each activated refrigeration unit and the main refrigeration pipe temperature gradually reach reasonable values.

[0048] In one example, when determining the number of refrigeration units to be started based on the unit load of the refrigeration unit and the main refrigeration pipe temperature of the refrigeration unit, a first interval in which the value of the unit load of the refrigeration unit is located can be determined, wherein the first interval is an interval in the numerical interval used to represent the size of the unit load; a second interval in which the value of the main refrigeration pipe temperature of the refrigeration unit is located can be determined, wherein the second interval is an interval in the numerical interval used to represent the size of the main refrigeration pipe temperature; based on the first interval and the second interval, the number of matching units is determined; and the refrigeration unit is started according to the number of units.

[0049] In this embodiment, different ranges can be set for the load of the refrigeration units. These ranges indicate the appropriateness of the load on the refrigeration units. For example, a load range of 40%-60% indicates a normal load range, while a load range of 20%-40% indicates a low load, and a load range of 0%-20% indicates a very low load. For low loads, the number of refrigeration units activated can be reduced, while for very low loads, the number of refrigeration units activated can be reduced. A load range of 60%-80% indicates a high load, in which case the number of refrigeration units activated can be increased. A load range of 80%-100% indicates a high load, in which case the number of refrigeration units activated can be increased. The main chiller temperature is the temperature achieved by the combined cooling of multiple already activated refrigeration units. This temperature can also be set within a range. For example, 10-15 degrees Celsius indicates a normal temperature range, while 5-10 degrees Celsius indicates a slightly lower temperature, indicating a large number of refrigeration units, in which case the number of refrigeration units activated can be reduced. 0-5 degrees Celsius indicates very low temperatures, so a few more refrigeration units can be added. 15-20 degrees Celsius indicates slightly higher temperatures, so additional refrigeration units can be added. 20-25 degrees Celsius indicates very high temperatures, so a few more refrigeration units can be added. It should be noted that the above range values ​​and the number of ranges are only examples, and the specific values ​​will be determined based on actual conditions.

[0050] In this embodiment, the first interval of the unit load values ​​and the second interval of the refrigeration main pipe temperature values ​​can be combined to determine the number of refrigeration units to be added or reduced. For example, if the first interval of the unit load values ​​determines that two refrigeration units can be reduced, and the second interval of the refrigeration main pipe temperature values ​​determines that four refrigeration units can be reduced, then the middle value between the two can be taken, that is, three refrigeration units can be reduced. In this embodiment, after the refrigeration units are started, the number of refrigeration units is not fixed and can be increased or decreased based on the unit load values ​​and the refrigeration main pipe temperature values.

[0051] In one embodiment, when the number of refrigeration units to be activated is determined based on the unit load and the main refrigeration pipe temperature of the refrigeration unit, one refrigeration unit may be activated when the refrigeration unit is activated; each time the unit load and the main refrigeration pipe temperature meet a condition for adding a unit, one more refrigeration unit may be activated; and each time the unit load and the main refrigeration pipe temperature meet a condition for reducing a unit, one refrigeration unit may be shut down.

[0052] In this embodiment, one refrigeration unit may be started first, or the number of refrigeration units to be started may be determined based on the first interval of the unit load and the second interval of the main refrigeration pipe temperature. After starting the refrigeration units, the decision to add or remove refrigeration units is made based on changes in the unit load and the main refrigeration pipe temperature. If the conditions for adding a unit are met, an additional refrigeration unit is started; if the conditions for removing a unit are met, one refrigeration unit is shut down.

[0053] In this embodiment, when there is a need to start a refrigeration unit, the refrigeration unit closest to the cold source can be started first, followed by the refrigeration unit farther from the cold source. This reduces the distance that the water in the pipeline flows. The number of times each refrigeration unit has been started can also be recorded, and the refrigeration unit with the smallest number of starts can be started first. This ensures that each refrigeration unit has a chance to start, avoiding situations where a refrigeration unit is not started for a long time.

[0054] In this embodiment, the connection mode of the pipeline can be determined according to the first water temperature. For example, when the difference between the condenser temperature of the refrigeration unit and the first water temperature is greater than a first threshold, the connection mode is switched to the first mode; when the difference between the condenser temperature of the refrigeration unit and the first water temperature is less than a second threshold, the connection mode is switched to the second mode, and the second threshold is less than or equal to the first threshold.

[0055] The second threshold value may be equal to the first threshold value. If the two are equal, it can be understood that a limit is set. If the difference between the condenser temperature of the refrigeration unit and the first water temperature is greater than the limit, heat recovery can be performed and the first mode is entered. If the difference between the condenser temperature of the refrigeration unit and the first water temperature is less than the limit, heat recovery is not performed and the second mode is entered. The second threshold value may also be less than the first threshold value. If the second threshold value is less than the first threshold value, the second threshold value and the first threshold value constitute a third interval. If the difference between the condenser temperature of the refrigeration unit and the first water temperature is greater than the maximum value of the third interval, heat recovery is performed and the first mode is entered. If the difference between the condenser temperature of the refrigeration unit and the first water temperature is less than the minimum value of the third interval, heat recovery is not performed and the second mode is entered.

[0056] For example, when the difference between the condenser temperature of the refrigeration unit and the first water temperature is greater than the maximum value of the third interval, it means that the condenser temperature is higher than the first water temperature. At this time, the water in the condenser can be used to heat the water in the water tank on the heat recovery side. Therefore, the condenser temperature drops, and the water in the water tank on the heat recovery side heats up, achieving heat recovery. If the difference between the condenser temperature of the refrigeration unit and the first water temperature is less than the minimum value of the third interval, it means that the temperature difference between the water in the condenser and the water in the water tank on the heat recovery side is small. At this time, if the water in the condenser is used to heat the water in the water tank on the heat recovery side, the heating efficiency is not high. Therefore, heat recovery can be omitted at this time. Instead, the refrigeration unit can be connected to a cooling water pump and a cooling tower to allow the cooling water pump and the cooling tower to cool the water in the refrigeration unit.

[0057] In this embodiment, since there are multiple refrigeration units started, the connection mode between the multiple refrigeration units can also be adjusted by adjusting the pipelines.

[0058] In one embodiment, when at least two refrigeration units are started, when the pipeline is in the first mode, the condensers of the at least two refrigeration units are connected in parallel; when the pipeline is in the second mode, the condensers of the at least two refrigeration units are connected in series. That is to say, if the pipeline is in the first mode and heat recovery is performed at this time, the condensers of multiple refrigeration units are connected in parallel. The advantage of parallel connection is that the heat loss of multiple refrigeration units is small and is recovered by the water tank on the heat recovery side. If heat recovery is not performed, multiple refrigeration units are connected in series. The series connection can form a progressive connection between the multiple refrigeration units, which can reduce the load of each refrigeration unit.

[0059] In one embodiment, if the cooling demand on the cold source side is less than a preset demand, the refrigeration unit can be omitted. If the refrigeration unit is omitted, the cold source side water tank can be directly connected to a cooling tower and a cooling water pump, which can be used to supply cooling to the cold source side water tank. Since the cooling demand on the cold source side water tank is small, the cooling tower and cooling water pump are sufficient.

[0060] Figure 4 and Figure 5It is a schematic diagram of the control process of this embodiment. When collecting parameters, the set value and actual value of the chilled water outlet temperature of the refrigeration unit of the cooling system are collected, and the unit cooling capacity ((Coefficient of Performance), cop) and the unit load rate are collected. For the cooling system, the inlet and outlet water temperatures, the operating status of the fan and cooling water pump, and the condensing side temperature are collected. For the heat storage system and the heating system, the water temperature of the water tank, the heat storage capacity, the heat recovery cycle status, the inlet and outlet water temperature of the heat recovery side, the supply and return water temperature, the supply and return water tank liquid level, the operating status of the user water pump on the heat recovery side, and the condensing side temperature are collected. The collected data are given to the controller, which controls the start and stop of the cooling water pump, the quantity, and controls the pipe connection method between the various devices by controlling the butterfly valve.

[0061] Continue to combine Figure 3 As shown, in this embodiment, the overall structure includes: a heat recovery (refrigeration) unit, a freezing side, a cooling side, and a heat recovery side. The refrigeration unit is used for cooling and has a heat recovery pipeline. In combination with external accessories, it recovers waste heat. The freezing side includes the unit's freezing series-parallel butterfly valves and freezing pumps. Through the switching of the freezing pumps combined with the series-parallel butterfly valves, it is equipped with dual water tanks to provide cold water to the terminal. The cooling side includes the unit's cooling side series-parallel butterfly valves, cooling pumps, and closed cooling towers. Its function is to circulate cooling water through the switching of the water pumps combined with the series-parallel butterfly valves. The heat recovery side includes the unit's heat recovery series-parallel butterfly valves and heat recovery circulation pumps, dual water tanks, that is, circulating hot water on the heat recovery side, and the cooling unit and water tanks store heat.

[0062] like Figure 6 As shown in the figure, when the system is turned on, one refrigeration unit is activated. The heat return water tank temperature is checked to see if it reaches the required value, a°C. If it does not, the chiller and heat recovery sides are switched to parallel water circuits. The system then starts one refrigeration unit and operates in heat recovery mode: for example, when unit 1 is turned on, butterfly valves v1 and v4 on the chiller water circuit are opened, and butterfly valves v2 and v3 are closed. A chiller pump is operated; butterfly valve v10 on the heat recovery water circuit is opened, and butterfly valves v9, v11, and v12 are closed. A heat recovery water pump is operated. After all pumps are turned on, refrigeration unit 1 is turned on. At this point, a single refrigeration unit is operating, performing heat recovery.

[0063] like Figure 7 As shown in the figure, when the heat recovery water tank temperature reaches the required value (a°C), the unit switches to cooling tower mode to improve energy efficiency: on the cooling side, butterfly valve V6 is opened, butterfly valves V5, V7, and V8 are closed, one cooling pump is running, and butterfly valve V10 is closed. When a single unit operates in cooling tower mode, if the heat recovery water tank user heat consumption falls below (ab)°C, indicating a significant drop in the heat recovery water tank temperature, the unit switches back to heat recovery mode and opens the corresponding water circuits.

[0064] like Figure 8As shown, during the above operation process, the system always determines whether the unit load and the temperature of the refrigeration main pipe meet the conditions for adding a unit. When the conditions for adding a unit are met, the refrigeration unit is first operated in the current mode (the unit is turned on to maintain heat recovery or cooling tower heat dissipation), and a chilled water pump is added. The cooling side is switched to a series water path, that is, after the v1 and v3 butterfly valves are opened, the v2 and v4 butterfly valves are closed, reducing water temperature fluctuations, increasing the main pipe temperature difference, and ensuring the end cold use; when the already turned on unit is operating in the heat recovery mode, the cooling side of the planned additional unit is opened in parallel: for example, the v5 and v7 butterfly valves are opened, the v6 and v8 butterfly valves are closed, and a cooling pump is turned on; when the already turned on unit is operating in the cooling tower heat dissipation mode, the v5 and v7 butterfly valves are opened in place, and the v6 and v8 butterfly valves are closed, and the cooling side is operated in a series countercurrent mode to increase the temperature difference between water and refrigerant and improve heat exchange efficiency.

[0065] Figure 8 The connection method of multiple refrigeration units is parallel connection. Figure 9 As shown in the figure, when multiple units are started and operated simultaneously, the condenser temperature of each unit is compared with the temperature of the water tank on the heat recovery side. If the condenser temperature exceeds the required value of a°C, the water circuit of each unit is switched to parallel connection and the cooling tower is used to cool the unit to ensure the unit COP. If the condenser temperature is lower than the temperature of (ab)°C, the heat recovery series mode is adopted.

[0066] When the conditions for reducing the number of units are met, the parallel mode of freezing, cooling and heat recovery is turned on: the parallel water circuits on the freezing side, cooling side and heat recovery are opened, that is, after unit 2 is shut down, V4 is opened with a delay, and after the butterfly valves V2 and V3 are closed, one freezing pump is turned off; V6 is opened, and after the butterfly valves V5, V7 and V8 are closed, one cooling pump is turned off; V10 is opened with a delay, and after the butterfly valves V8, V11 and V12 are closed, one heat recovery pump is turned off.

[0067] This embodiment monitors the chiller's COP, load, power consumption on each side, cooling power, and other data in real time during various operating modes. The optimal operating mode is determined through algorithmic calculations and internal controller logic. The COP and system energy efficiency are then improved by switching between these modes.

[0068] For cooling in transition seasons, run the cooling tower cooling mode, such as Figure 10 As shown, open v8, v13, and v14, close other valves, and use the cooling tower to store cold in the water supply tank to meet the terminal cooling demand.

[0069] like Figure 11 As shown, this embodiment also provides a pipeline switching device for simultaneous cold and hot supply, comprising:

[0070] an acquisition module, configured to acquire a first water temperature of water in a water tank on a heat recovery side, wherein the heat recovery side is configured to recover heat energy generated during a refrigeration process of the refrigeration unit;

[0071] A switching module is used to switch the connection mode of the pipeline according to the first water temperature, wherein the connection mode includes at least a first mode and a second mode. In the first mode, the heat recovery side is connected to the refrigeration unit, the refrigeration unit is connected to the cold source side water tank, and the refrigeration unit is used for cooling; in the second mode, the heat recovery side is disconnected from the refrigeration unit and the refrigeration unit is connected to the cooling water pump and the cooling tower, and the refrigeration unit is used for cooling.

[0072] Simultaneous heating and cooling is a scenario where both cooling and heating are required. For example, pasteurization of milk requires heating the milk to a certain temperature and then rapidly cooling it. In this scenario, both heating and cooling are required, which is the aforementioned simultaneous heating and cooling scenario.

[0073] For simultaneous heating and cooling, a refrigeration unit can be used. A refrigeration unit is a device used for cooling. For example, after heating milk, the milk can be cooled by the cold air generated by the refrigeration unit. In addition to the refrigeration unit, heat recovery equipment is also required. This heat recovery equipment collects the heat energy generated by the refrigeration unit during the cooling process. This collected heat energy can be used for heating.

[0074] The heat recovery equipment and refrigeration unit can be connected via piping. If the heat recovery equipment and refrigeration unit are connected, the connection mode is the first mode. If the heat recovery equipment and refrigeration unit are not connected, but the refrigeration unit is connected to the cooling water pump and cooling tower via piping, the connection mode is the second mode. The two modes can be automatically switched based on actual conditions. The mode can be automatically switched upon receiving a command, or the mode can be switched based on the water temperature in the water tank of the heat recovery unit.

[0075] For example, Figure 2 This is a schematic diagram of an exemplary refrigeration unit connection. The refrigeration unit is connected to a cold source water tank, supplying cooling to the cold source water tank. The heat generated during the cooling process is supplied to the heat recovery water tank. In this mode, the refrigeration unit is disconnected from the cooling water pump and cooling tower, operating in the first mode. However, if the water temperature in the heat recovery water tank is too high, the refrigeration unit enters the second mode, connecting to the cooling water pump and cooling tower but disconnecting from the heat recovery water tank. Heat recovery is not performed in this mode. Figure 2 The line in the middle represents the water pipe. Figure 2 The structure in the figure is merely an example used to explain the first mode and the second mode, and does not constitute a limitation on the structure of this application.

[0076] In this embodiment, a heat recovery water tank can be configured on the heat recovery side to store heat. The water tank can be divided into a supply tank and a return tank, one for supply and one for return. During heat storage, water from the supply tank is first used for heat storage, with the remaining heat energy stored in the return tank. The water in the supply tank can be used as a heat source to heat the object to be heated, such as milk. The heated water then enters the return tank.

[0077] The refrigeration unit consists of a condenser and an evaporator, which work together to cool the water in the cold source tank. This water can be used to rapidly cool objects, such as milk. The heat generated by the refrigeration unit is stored in the water tank of the heat recovery device.

[0078] The cold source side water tank can also include a supply water tank and a return water tank. The cold water in the supply water tank cools the object and then circulates into the return water tank. When the refrigeration unit is cooling, it cools the water in the supply water tank and the return water tank, so that the cooled water can quickly cool the object.

[0079] In this embodiment, if the heat generated during the refrigeration process of the refrigeration unit does not need to be stored, nor does it need to be stored on the heat recovery side, the refrigeration unit can be connected to a cooling tower and a cooling water pump. In this way, the heat generated during the refrigeration process of the refrigeration unit is offset by the cooling tower and the cooling water pump and is not recovered.

[0080] There are many reasons why the heat generated by the refrigeration process of the refrigeration unit is not recovered. For example, the temperature of the water on the heat recovery side is too high, making it impossible to effectively recover the heat, or the control instruction controls the heat recovery to be not performed.

[0081] The pipelines in this embodiment can be connected through a butterfly valve, and the flow path of water in the pipeline can be controlled by opening and closing the butterfly valve, so that the pipeline and the refrigeration unit, heat recovery module, cooling tower and cooling water pump form a first mode or a second mode connection mode. In the first mode, heat recovery can be performed, and in the second mode, heat recovery is not performed.

[0082] The refrigeration units in this embodiment can be a single unit or multiple units. If multiple units are included, the number of refrigeration units to be activated can be determined based on actual conditions. Each of the multiple refrigeration units is connected to the heat recovery side via a pipeline, and is also connected to the cooling water pump and cooling tower via a pipeline. By controlling the opening and closing of the butterfly valve in the pipeline, the refrigeration equipment of the unit can be controlled to start cooling.

[0083] like Figure 3 As shown, Figure 3 In the refrigeration unit, the condenser and evaporator are Figure 3The lines in the diagram are pipelines, and the water in the pipelines flows through them. V1 to V14 are butterfly valves, and the flow path of the water in the pipelines can be controlled by opening and closing the butterfly valves. Figure 3 Two refrigeration units are shown, and there can be more refrigeration units. The cold source water pump and the cold source user pump use the cold water in the connected return water tank and supply water tank to provide cold air or cold water to the user. The cold water is cooled and cooled by the refrigeration unit. The heat generated by the refrigeration unit is given to the supply water tank and return water tank connected to the heat recovery circulation pump and the heat recovery user pump. The water tanks are filled with hot water and provide hot water or hot air to the user. The refrigeration unit switches between the first mode and the second mode by opening and closing the butterfly valve, connecting the water tank on the heat recovery side or connecting the cooling water pump to the cooling tower.

[0084] The method provided by the embodiment of the present application obtains a first water temperature of the water in the water tank on the heat recovery side, wherein the heat recovery side is used to recover the heat energy generated during the refrigeration process of the refrigeration unit; according to the first water temperature, the connection mode of the pipeline is switched, wherein the connection mode includes at least a first mode and a second mode. In the first mode, the heat recovery side is connected to the refrigeration unit, the refrigeration unit is connected to the cold source side water tank, and the refrigeration unit is used for cooling; in the second mode, the heat recovery side is disconnected from the refrigeration unit and the refrigeration unit is connected to the cooling water pump and the cooling tower, and the refrigeration unit is used for cooling, so that the connection mode of the hot and cold supply pipes can be determined according to the water temperature of the water in the water tank on the heat recovery side, so that the hot and cold supply process can flexibly switch the connection mode of the pipeline and the equipment according to the scenario.

[0085] This embodiment Figure 11 The device's cold water tank outlet can discharge cold water for cooling, while the heat generated during the cooling process is recovered into the hot water tank and used for heating through the hot water tank outlet. This device can be coordinated with other heating modules. If the device's heat supply is insufficient, the other heating modules will make up for the shortfall.

[0086] This embodiment also provides a pipeline switching system for simultaneous cold and hot supply, including:

[0087] The water tank on the heat recovery side is used to recover the heat energy generated by the refrigeration process of the refrigeration unit;

[0088] Refrigeration unit, used for cooling;

[0089] Cooling towers and cooling water pumps for auxiliary refrigeration;

[0090] The pipeline switches to different connection modes according to the first water temperature of the water in the water tank on the heat recovery side, wherein the connection mode includes at least a first mode and a second mode. In the first mode, the heat recovery side is connected to the refrigeration unit, and the refrigeration unit is connected to the water tank on the cold source side; in the second mode, the heat recovery side is disconnected from the refrigeration unit and the refrigeration unit is connected to the cooling water pump and the cooling tower.

[0091] Simultaneous heating and cooling is a scenario where both cooling and heating are required. For example, pasteurization of milk requires heating the milk to a certain temperature and then rapidly cooling it. In this scenario, both heating and cooling are required, which is the aforementioned simultaneous heating and cooling scenario.

[0092] For simultaneous heating and cooling, a refrigeration unit can be used. A refrigeration unit is a device used for cooling. For example, after heating milk, the milk can be cooled by the cold air generated by the refrigeration unit. In addition to the refrigeration unit, heat recovery equipment is also required. This heat recovery equipment collects the heat energy generated by the refrigeration unit during the cooling process. This collected heat energy can be used for heating.

[0093] The heat recovery equipment and refrigeration unit can be connected via piping. If the heat recovery equipment and refrigeration unit are connected, the connection mode is the first mode. If the heat recovery equipment and refrigeration unit are not connected, but the refrigeration unit is connected to the cooling water pump and cooling tower via piping, the connection mode is the second mode. The two modes can be automatically switched based on actual conditions. The mode can be automatically switched upon receiving a command, or the mode can be switched based on the water temperature in the water tank of the heat recovery unit.

[0094] For example, Figure 2 This is a schematic diagram of an exemplary refrigeration unit connection. The refrigeration unit is connected to a cold source water tank, supplying cooling to the cold source water tank. The heat generated during the cooling process is supplied to the heat recovery water tank. In this mode, the refrigeration unit is disconnected from the cooling water pump and cooling tower, operating in the first mode. However, if the water temperature in the heat recovery water tank is too high, the refrigeration unit enters the second mode, connecting to the cooling water pump and cooling tower but disconnecting from the heat recovery water tank. Heat recovery is not performed in this mode. Figure 2 The line in the middle represents the water pipe. Figure 2 The structure in the figure is merely an example used to explain the first mode and the second mode, and does not constitute a limitation on the structure of this application.

[0095] In this embodiment, a heat recovery water tank can be configured on the heat recovery side to store heat. The water tank can be divided into a supply tank and a return tank, one for supply and one for return. During heat storage, water from the supply tank is first used for heat storage, with the remaining heat energy stored in the return tank. The water in the supply tank can be used as a heat source to heat the object to be heated, such as milk. The heated water then enters the return tank.

[0096] The refrigeration unit consists of a condenser and an evaporator, which work together to cool the water in the cold source tank. This water can be used to rapidly cool objects, such as milk. The heat generated by the refrigeration unit is stored in the water tank of the heat recovery device.

[0097] The cold source side water tank can also include a supply water tank and a return water tank. The cold water in the supply water tank cools the object and then circulates into the return water tank. When the refrigeration unit is cooling, it cools the water in the supply water tank and the return water tank, so that the cooled water can quickly cool the object.

[0098] In this embodiment, if the heat generated during the refrigeration process of the refrigeration unit does not need to be stored, nor does it need to be stored on the heat recovery side, the refrigeration unit can be connected to a cooling tower and a cooling water pump. In this way, the heat generated during the refrigeration process of the refrigeration unit is offset by the cooling tower and the cooling water pump and is not recovered.

[0099] There are many reasons why the heat generated by the refrigeration process of the refrigeration unit is not recovered. For example, the temperature of the water on the heat recovery side is too high, making it impossible to effectively recover the heat, or the control instruction controls the heat recovery to be not performed.

[0100] The pipelines in this embodiment can be connected through a butterfly valve, and the flow path of water in the pipeline can be controlled by opening and closing the butterfly valve, so that the pipeline and the refrigeration unit, heat recovery module, cooling tower and cooling water pump form a first mode or a second mode connection mode. In the first mode, heat recovery can be performed, and in the second mode, heat recovery is not performed.

[0101] The refrigeration units in this embodiment can be a single unit or multiple units. If multiple units are included, the number of refrigeration units to be activated can be determined based on actual conditions. Each of the multiple refrigeration units is connected to the heat recovery side via a pipeline, and is also connected to the cooling water pump and cooling tower via a pipeline. By controlling the opening and closing of the butterfly valve in the pipeline, the refrigeration equipment of the unit can be controlled to start cooling.

[0102] like Figure 3 As shown, Figure 3 In the refrigeration unit, the condenser and evaporator are Figure 3 The lines in the diagram are pipelines, and the water in the pipelines flows through them. V1 to V14 are butterfly valves, and the flow path of the water in the pipelines can be controlled by opening and closing the butterfly valves. Figure 3Two refrigeration units are shown, and there can be more refrigeration units. The cold source water pump and the cold source user pump use the cold water in the connected return water tank and supply water tank to provide cold air or cold water to the user. The cold water is cooled and cooled by the refrigeration unit. The heat generated by the refrigeration unit is given to the supply water tank and return water tank connected to the heat recovery circulation pump and the heat recovery user pump. The water tanks are filled with hot water and provide hot water or hot air to the user. The refrigeration unit switches between the first mode and the second mode by opening and closing the butterfly valve, connecting the water tank on the heat recovery side or connecting the cooling water pump to the cooling tower.

[0103] The method provided by the embodiment of the present application obtains a first water temperature of the water in the water tank on the heat recovery side, wherein the heat recovery side is used to recover the heat energy generated during the refrigeration process of the refrigeration unit; according to the first water temperature, the connection mode of the pipeline is switched, wherein the connection mode includes at least a first mode and a second mode. In the first mode, the heat recovery side is connected to the refrigeration unit, the refrigeration unit is connected to the cold source side water tank, and the refrigeration unit is used for cooling; in the second mode, the heat recovery side is disconnected from the refrigeration unit and the refrigeration unit is connected to the cooling water pump and the cooling tower, and the refrigeration unit is used for cooling, so that the connection mode of the hot and cold supply pipes can be determined according to the water temperature of the water in the water tank on the heat recovery side, so that the hot and cold supply process can flexibly switch the connection mode of the pipeline and the equipment according to the scenario.

[0104] This embodiment also provides an electrical appliance, such as a refrigerator, freezer, or air conditioner, that incorporates the piping switching system for simultaneous hot and cold supply described in this embodiment. For example, a refrigerator uses this system to provide cooling while simultaneously recovering heat for a water heater. Because the water in the water heater is relatively hot, the recovered heat energy can first be used to heat the cold water in the water heater. This heated water is then heated to a desired temperature by the water heater. This reduces the water heater's energy consumption and enables heat recovery in the refrigerator.

[0105] like Figure 12 As shown, the embodiment of the present application provides a pipeline switching device for simultaneous hot and cold supply, including a processor 111, a communication interface 112, a memory 113 and a communication bus 114, wherein the processor 111, the communication interface 112, and the memory 113 communicate with each other through the communication bus 114.

[0106] Memory 113, for storing computer programs;

[0107] In one embodiment of the present application, the processor 111 is configured to implement the method for pipeline switching under simultaneous cold and hot supply provided by any one of the aforementioned method embodiments when executing the computer program stored in the memory 113 .

[0108] An embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the pipeline switching method under simultaneous cold and hot supply provided in any of the aforementioned method embodiments are implemented.

[0109] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of this embodiment.

[0110] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a general hardware platform, or of course, by hardware. Based on this understanding, the above technical solution, in essence, or the part that contributes to the relevant technology, can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiment.

[0111] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0112] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A pipeline switching method for simultaneous cold and hot supply, characterized in that: include: Obtaining a first water temperature of water in a water tank on a heat recovery side, wherein the heat recovery side is used to recover heat energy generated during a refrigeration process of the refrigeration unit; According to the first water temperature, the connection mode of the pipeline is switched, wherein the connection mode includes at least a first mode and a second mode, in which, in the first mode, the heat recovery side is connected to the refrigeration unit, the refrigeration unit is connected to the cold source side water tank, and the refrigeration unit is used for cooling; in the second mode, the heat recovery side is disconnected from the refrigeration unit and the refrigeration unit is connected to the cooling water pump and the cooling tower, and the refrigeration unit is used for cooling.

2. The method according to claim 1, characterized in that: The refrigeration unit comprises at least two groups.

3. The method according to claim 2, characterized in that The method further comprises: In the first mode or the second mode, the number of the refrigeration groups to be started is determined according to the unit load of the refrigeration group and the freezing main pipe temperature of the refrigeration group, and the refrigeration groups are started according to the number of units.

4. The method according to claim 3, characterized in that In the first mode or the second mode, determining the number of the refrigeration groups to be started according to the unit load of the refrigeration group and the freezing main pipe temperature of the refrigeration group, and starting the refrigeration groups according to the number of units includes: Determine a first interval in which the value of the unit load of the refrigeration unit is located, wherein the first interval is an interval in a numerical interval used to represent the magnitude of the unit load; Determine a second interval in which the value of the freezing main pipe temperature of the refrigeration unit is located, wherein the second interval is an interval in the numerical value interval used to represent the magnitude of the freezing main pipe temperature; Determining the number of matching units according to the first interval and the second interval; The refrigeration units are started according to the number of units.

5. The method according to claim 3, characterized in that: In the first mode or the second mode, determining the number of the refrigeration groups to be started according to the unit load of the refrigeration group and the freezing main pipe temperature of the refrigeration group, and starting the refrigeration groups according to the number of units includes: When starting the refrigeration unit, start one refrigeration unit; Whenever the load of the unit and the temperature of the refrigeration main pipe meet the conditions for adding a unit, one more refrigeration unit is started.

6. The method according to claim 5, characterized in that Whenever the unit load and the temperature of the refrigeration main pipe meet the condition for adding a unit, after starting one more refrigeration unit, the method further includes: Whenever the unit load and the temperature of the refrigeration main pipe meet the conditions for reducing the unit, one refrigeration unit is shut down.

7. The method according to claim 1, characterized in that The switching of the connection mode of the pipeline according to the first water temperature includes: When the difference between the condenser temperature of the refrigeration unit and the first water temperature is greater than a first threshold, switching the connection mode to the first mode; When the difference between the condenser temperature of the refrigeration unit and the first water temperature is less than a second threshold, the connection mode is switched to a second mode, and the second threshold is less than or equal to the first threshold.

8. The method according to claim 7, characterized in that The method further comprises: When at least two groups of refrigeration units are started, when the pipeline is in the first mode, the condensers of the at least two groups of refrigeration units are connected in parallel; when the pipeline is in the second mode, the condensers of the at least two groups of refrigeration units are connected in series.

9. The method according to claim 1, characterized in that: The connection mode also includes a third mode, in which the cooling tower and the cooling water pump are connected to the cold source side water tank, and the method further includes: When the cooling demand on the cooling source side is less than the preset demand, the connection mode is adjusted to the third mode.

10. A pipeline switching device for simultaneous cold and hot supply, characterized in that: include: An acquisition module, used for acquiring a first water temperature of water in a water tank on a heat recovery side, wherein the heat recovery side is used for recovering heat energy generated during a refrigeration process of the refrigeration unit; A switching module is used to switch the connection mode of the pipeline according to the first water temperature, wherein the connection mode includes at least a first mode and a second mode. In the first mode, the heat recovery side is connected to the refrigeration unit, the refrigeration unit is connected to the cold source side water tank, and the refrigeration unit is used for cooling; in the second mode, the heat recovery side is disconnected from the refrigeration unit and the refrigeration unit is connected to the cooling water pump and the cooling tower, and the refrigeration unit is used for cooling.

11. A pipeline switching system for simultaneous cold and hot supply, characterized in that: include: The water tank on the heat recovery side is used to recover the heat energy generated during the refrigeration process of the refrigeration unit; Refrigeration unit, used for refrigeration; Cooling towers and cooling water pumps to assist refrigeration; The pipeline is switched to different connection modes according to the first water temperature of the water in the water tank on the heat recovery side, wherein the connection mode includes at least a first mode and a second mode. In the first mode, the heat recovery side is connected to the refrigeration unit, and the refrigeration unit is connected to the water tank on the cold source side; in the second mode, the heat recovery side is disconnected from the refrigeration unit and the refrigeration unit is connected to the cooling water pump and the cooling tower.

12. An electrical appliance, characterized in that: A system comprising the method of claim 11.

13. A pipeline switching device for simultaneous cold and hot supply, characterized in that: include: A processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; The memory is used to store a computer program; and the processor is used to implement the method according to any one of claims 1 to 9 when executing the computer program.

14. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 9 is implemented.

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