Cold and heat control method, device and system for low-temperature evaporated water recovery system

Abstract

The invention relates to the technical field of sewage treatment, and discloses a cold and heat control method for recycling low-temperature evaporated water. The method comprises the steps that first output power is determined according to a first temperature difference value between the set temperature and the current temperature of a condensation cavity, and the current condensate water flow corresponding to the current temperature is determined according to the first corresponding relation between the condensation temperature and the condensate water flow; determining second output power according to the current condensate water flow and the first output power; according to the current temperature and the change rate thereof, determining a future temperature and a future condensate water flow and a future evaporation heat absorption flow corresponding to the future temperature; second heating flow is determined according to the first heating flow corresponding to the second output power and future evaporation heat absorption flow; the heat pump device is controlled according to the second output power, and the auxiliary heating device is controlled according to the second heating flow. By adopting the method, the adverse effect on the vacuum pump can be reduced. The invention further discloses a cold and heat control device and system for the low-temperature evaporated water recovery system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment, for example to a cold and heat control method, device and system for a low-temperature evaporation water recovery system. BACKGROUND

[0002] The basic process of sewage treatment is to evaporate water in sewage, concentrate and discard the concentrated liquid or paste, recover the evaporated water and recycle it, so as to achieve the purpose of environmental protection.

[0003] Evaporating sewage faces a problem: there are many organic matters in sewage, and the higher the temperature, the more likely it is to cause chemical reactions of these organic matters. To this end, low-temperature evaporation technology can make water boil between 20℃ and 40℃, so that the evaporation temperature can greatly slow down the chemical reactions of organic matters, and therefore, low-temperature evaporation technology has become a common means in sewage treatment processes.

[0004] The prior art usually uses the heat pump heating end to heat the sewage after vacuumizing, so that the sewage evaporates, and then uses the heat pump refrigeration end to condense the water vapor into liquid.

[0005] In the process of implementing the embodiments of the present application, it is found that at least the following problems exist in the related art:

[0006] In the process of adding sewage on one side, discharging concentrated liquid or paste on the other side, and collecting condensed water, the continuously added sewage and the continuously discharged concentrated liquid or paste will interfere with the sewage evaporation-condensation process. Since the heat pump refrigeration end and the heating end interact with each other, that is, the greater the refrigeration capacity of the refrigeration end, the greater the heating flow of the heating end, and under the condition of external interference, it is difficult to maintain the balance between the sewage evaporation process and the condensation process, which makes it difficult to maintain the stability of the water content in the air inside the sewage treatment system. In the sewage treatment process, vacuumizing is required, and the fluctuation of the water content in the air is easy to cause water vapor to enter the vacuum pump, which is not conducive to the vacuum pump. Even if the drying treatment is performed on the gas sucked into the vacuum pump, it is also easy to cause excessive consumption of the drying agent. SUMMARY

[0007] To provide a basic understanding of some aspects of the disclosed embodiments, the following summary has been presented. The summary is not an overall description of the application, nor is it intended to determine key / important elements or delineate the scope of the embodiments. It is intended to serve as a prelude to the detailed description below.

[0008] The embodiments of the present application provide a cold and heat control method, device and system for a low-temperature evaporation water recovery system, which balances the evaporation and condensation of the water recovery system by controlling the temperature / heat of the condensation cavity and the evaporation cavity, reduces the adverse effects on the vacuum pump, or reduces the refrigerant required for drying.

[0009] In some embodiments, the water recovery system comprises a tank body, a heat pump device, an auxiliary heating device; a refrigeration end of the heat pump device is used to cool a condensation chamber of the tank body; a heating end of the heat pump device and the auxiliary heating device are used to heat an evaporation chamber of the tank body; the tank body is subjected to vacuumization from the condensation chamber; a cold and heat control method for a low-temperature evaporation water recovery system comprises:

[0010] obtaining a first temperature difference value of a set temperature and a current temperature of the condensation chamber; the set temperature reflects a designed condensation temperature;

[0011] determining a first output power of the heat pump device according to the first temperature difference value based on a basic control algorithm;

[0012] determining a current condensation water flow corresponding to the current temperature according to a first corresponding relationship between condensation temperatures and condensation water flows; the condensation temperature and the condensation water flow in the first corresponding relationship are negatively correlated;

[0013] determining a second output power according to the current condensation water flow and the first output power; the second output power is positively correlated with the current condensation water flow and positively correlated with the first output power;

[0014] determining a future temperature according to the current temperature and a change rate thereof;

[0015] determining a future condensation water flow corresponding to the future temperature according to the first corresponding relationship;

[0016] determining a future evaporation heat absorption flow according to the future condensation water flow;

[0017] determining a first heating flow of the heating end of the heat pump device according to the second output power;

[0018] determining a second heating flow according to the future evaporation heat absorption flow and the first heating flow; the second heating flow is positively correlated with the future evaporation heat absorption flow and negatively correlated with the first heating flow;

[0019] controlling the heat pump device according to the second output power and controlling the auxiliary heating device according to the second heating flow.

[0020] Optionally, determining the second output power according to the current condensation water flow and the first output power comprises:

[0021] determining a current heat release flow of water vapor in a phase change process of being liquefied into water corresponding to the current condensation water flow according to liquid enthalpy and vapor enthalpy of water;

[0022] A first change rate of the current heat release flow is obtained, and a future heat release flow after a first set time length is determined according to the current heat release flow and the first change rate; wherein the first set time length is determined according to a sum of a first response time length and a first heat conduction time length, the first response time length is a time length required for the heating end of the heat pump device to change from power change to heat absorption flow change, and the first heat conduction time length is a time length required for heat to be conducted from the surface of the refrigeration end to the inside in the air environment;

[0023] The second output power is determined according to a sum of the first output power and the future heat release flow.

[0024] Optionally, the second output power is determined according to a sum of the first output power and the future heat release flow, comprising:

[0025] A first product of the future heat release flow and the first heat conduction rate is calculated;

[0026] A future conduction heat release flow from the surface of the refrigeration end to the inside of the refrigeration end in the air environment corresponding to the future heat release flow is determined according to the first product;

[0027] The second output power is determined according to a sum of the future conduction heat release flow and the first output power.

[0028] Optionally, the second output power is determined according to the current condensate flow and the first output power, comprising:

[0029] A second temperature difference value of a current evaporation temperature of the evaporation chamber and a current temperature of the condensation chamber is obtained;

[0030] The second temperature difference value is mapped as a heat error cumulative value;

[0031] The second output power is determined according to a sum of the first output power, the current heat release flow and the heat error cumulative value.

[0032] Optionally, the future temperature is determined according to the current temperature and a change rate thereof, comprising:

[0033] A future temperature after a second set time length is determined according to the current temperature and the change rate thereof; wherein the second set time length is negatively correlated with the current condensate flow;

[0034] The second heating flow is determined according to the future evaporation heat absorption flow and the first heating flow, comprising:

[0035] The second heating flow is determined according to a first heat flow difference value of the future evaporation heat absorption flow and the first heating flow.

[0036] Optionally, the second heating flow is determined according to the first heat flow difference value of the future evaporation heat absorption flow and the first heating flow, comprising:

[0037] calculating a second product of the first heating flow rate and the second conduction rate;

[0038] determining, according to the second product, a conduction heating flow rate of the first heating flow rate conducted from inside of the heating end to the surface of the heating end;

[0039] determining, according to a first heat flow difference between the future evaporation heat absorption flow rate and the conduction heating flow rate, a second heating flow rate.

[0040] Optionally, determining, according to a first heat flow difference between the future evaporation heat absorption flow rate and the first heating flow rate, the second heating flow rate, comprises:

[0041] obtaining an evaporation temperature of the evaporation chamber and a tank inlet water temperature and an inlet water flow rate;

[0042] determining, according to a second temperature difference between the evaporation temperature and the inlet water temperature and the inlet water flow rate, a required heat flow rate;

[0043] obtaining, by subtracting the required heat flow rate from the first heat flow rate, a second heat flow difference;

[0044] determining, according to the second heat flow difference, the second heating flow rate.

[0045] In some embodiments, the water recovery system comprises a tank, a heat pump device, and an auxiliary heating device; a refrigeration end of the heat pump device is used to cool a condensation chamber of the tank; a heating end of the heat pump device and the auxiliary heating device are used to heat an evaporation chamber of the tank; the tank is subjected to vacuumization from the condensation chamber; and a cold and heat control device for a low-temperature evaporation water recovery system comprises:

[0046] an obtaining module, configured to obtain a first temperature difference between a set temperature and a current temperature of the condensation chamber; the set temperature reflects a design condensation temperature;

[0047] a first determining module, configured to determine, according to a basic control algorithm, a first output power of the heat pump device from the first temperature difference;

[0048] a second determining module, configured to determine, according to a first correspondence between the condensation temperature and the condensation water flow rate, a current condensation water flow rate corresponding to the current temperature; the condensation temperature and the condensation water flow rate in the first correspondence are negatively correlated;

[0049] a third determining module, configured to determine, according to the current condensation water flow rate and the first output power, a second output power; the second output power is positively correlated with the current condensation water flow rate and positively correlated with the first output power;

[0050] a fourth determining module, configured to determine, according to the current temperature and a change rate thereof, a future temperature;

[0051] a fifth determining module, configured to determine, according to the first correspondence, a future condensation water flow rate corresponding to the future temperature;

[0052] a sixth determining module configured to determine a future evaporation heat absorption flow according to the future condensate flow;

[0053] a seventh determining module configured to determine a first heating flow of the heating end of the heat pump device according to the second output power;

[0054] an eighth determining module configured to determine a second heating flow according to the future evaporation heat absorption flow and the first heating flow; the second heating flow is positively correlated with the future evaporation heat absorption flow, and the second heating flow is negatively correlated with the first heating flow;

[0055] a control module configured to control the heat pump device according to the second output power and control the auxiliary heating device according to the second heating flow.

[0056] In some embodiments, the cold-heat control device for the low-temperature evaporation water recovery system comprises a processor and a memory storing program instructions, and the processor is configured to execute the program instructions to perform the cold-heat control method for the low-temperature evaporation water recovery system provided in the foregoing embodiments.

[0057] In some embodiments, the cold-heat control system for the low-temperature evaporation water recovery system comprises the cold-heat control device for the low-temperature evaporation water recovery system provided in the foregoing embodiments.

[0058] The cold-heat control method, device and system for the low-temperature evaporation water recovery system provided in the embodiments of the present application can achieve the following technical effects:

[0059] For any water recovery system that has been produced, the structure of the condensation chamber cannot be changed, and it has a designed vacuum degree, that is, the evaporation temperature of the evaporation chamber is a constant value. In this case, the condensation temperature and the condensate flow have a one-to-one correspondence, that is, the first correspondence.

[0060] The set temperature of the condensation chamber reflects the designed condensation temperature. Under the first correspondence, the set temperature can reflect the designed condensation rate. The present application controls the current temperature of the condensation chamber according to the set temperature, which also controls the condensation rate of the condensation chamber. In the presence of interference, the current temperature of the condensation chamber is dynamically stabilized at the set temperature, that is, the current condensate flow is dynamically stabilized at the designed condensate flow.

[0061] In the working process of the water recovery system, water continuously evaporates and condenses. The condensate is produced by the condensation and liquefaction of water vapor in the condensation chamber. The condensate flow is directly related to the condensation and liquefaction rate of water vapor in the condensation chamber. A large amount of heat is released when water vapor condenses and liquefies into liquid water. Based on this, the condensate flow actually reflects the heat release of the environment around the refrigeration end in the condensation chamber.

[0062] The second output power is determined according to the current condensate flow and the first output power, that is, the first output power output by the basic control algorithm is incrementally compensated according to the actual environment. Specifically, the first output power is incrementally compensated according to the continuous heat release of the environment around the refrigeration end. In particular, during the process of cooling the refrigeration end, such incremental compensation can enable the refrigeration end of the heat pump device to reach the set temperature from the current temperature in a relatively stable manner under such an environment.

[0063] At the same time, since the heating end of the heat pump device is used to heat the evaporation chamber, after the first output power is incrementally compensated, the heating end of the heat pump device generates more heat, which will have the following trend: the evaporation chamber generates more water vapor, and more water vapor will be condensed in the condensation chamber, which will not only cause the vacuum pump to suck too much moisture, but also cause the temperature of the condensation chamber to rise, which is not conducive to the temperature control of the condensation chamber.

[0064] The method controls the auxiliary heating device based on the matching relationship between the condensate flow and the condensation temperature, so that the evaporation rate of the evaporation chamber matches the condensate flow and the condensation temperature, and then the set temperature of the condensation chamber is adjusted steadily.

[0065] Specifically, the future temperature represents the future condensate flow, which is obtained by condensing water vapor, and the water vapor is obtained by evaporation in the evaporation chamber. Therefore, the future condensate flow represents the future evaporation heat absorption flow.

[0066] The second heating flow is determined according to the future evaporation heat absorption flow and the first heating flow, which can match the first heating flow and the second heating flow with the evaporation heat absorption flow, and then match the evaporation rate of the evaporation chamber with the future condensate flow, that is, with the water vapor condensation rate of the condensation chamber.

[0067] The temperature control process of the condensation chamber is based on this water vapor condensation rate, so the temperature control process of the condensation chamber can be stable, and the water recovery system can adjust the condensation temperature of the condensation chamber steadily based on the dynamic balance between the evaporation speed and the condensation rate, and finally the current temperature of the condensation chamber reaches the set temperature, and the entire water recovery system reaches the design condensation rate.

[0068] Based on the above process, when there is external interference, the present scheme can balance the evaporation and condensation of the water recovery system, reduce the adverse effects on the vacuum pump, or reduce the refrigerant required for drying, and after the interference, the present scheme can also enable the entire water recovery system to return to the design condensation rate.

[0069] The foregoing general description and the following description are only exemplary and explanatory, and are not intended to limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0070] One or more embodiments are illustrated by way of example in the figures that are described in connection with the following detailed description. These illustrative descriptions are not intended to limit the scope of the embodiments to the forms disclosed, but are intended to cover equivalents, modifications, and alternatives falling within the scope of the embodiments. Like numbers refer to like elements throughout the description. And, in the figures:

[0071] Figure 1 is a schematic diagram of a low-temperature evaporative water recovery system provided by an embodiment of the present application;

[0072] Figure 2 is a flowchart of a cold and heat control method for a low-temperature evaporative water recovery system provided by an embodiment of the present application;

[0073] Figure 3 is a schematic diagram of a cold and heat control device for a low-temperature evaporative water recovery system provided by an embodiment of the present application;

[0074] Figure 4 is a schematic diagram of a cold and heat control device for a low-temperature evaporative water recovery system provided by an embodiment of the present application. DETAILED DESCRIPTION

[0075] In order to enable a more detailed understanding of the features and technical content of the embodiments of the present application, the implementation of the embodiments of the present application is described in detail below in conjunction with the drawings, which are only used for reference and do not limit the embodiments of the present application. In the following technical description, in order to facilitate explanation, a plurality of details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be simplified to facilitate the drawings.

[0076] The terms "first", "second", and the like in the specification and claims of the embodiments of the present application and the above drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0077] Unless otherwise specified, the term "a plurality of" means two or more.

[0078] In the embodiments of the present application, the character " / " represents an "or" relationship between the objects before and after it. For example, A / B represents: A or B.

[0079] The term "and / or" is a description of the association relationship between the objects, which means that there can be three relationships. For example, A and / or B means: A or B, or, A and B, the three relationships.

[0080] Figure 1 is a schematic diagram of a low-temperature evaporation water recovery system provided by an embodiment of the present application.

[0081] In combination Figure 1 As shown in the figure, the water recovery system comprises a tank 10, a heat pump device 20, an auxiliary heating device 30 and a water collecting device 40.

[0082] The heat pump device 20 comprises a refrigeration end 21 (indicated by a vertical line in the figure) and a heating end 22, and the tank 10 comprises a condensation chamber 11 and an evaporation chamber 12 which are in communication with each other. The refrigeration end 21 of the heat pump device 20 is arranged in the condensation chamber 11 for heating the condensation chamber 11, and the heating end 22 of the heat pump device 20 is arranged in the evaporation chamber 12 for heating the evaporation chamber 12. Figure 1 The tank 10 is connected with a vacuum pipe 15 from the condensation chamber 11 for vacuumizing. In the process of vacuumizing, air is continuously extracted outside. When the condensation chamber 11 is vacuumized, the water in the extracted air is less because the water vapor in the air has been condensed and liquefied in the condensation chamber 11.

[0083] The general vacuum degree can be 0.01 to 0.2 bar, and any one of them can be selected, for example, the vacuum degree in the tank 10 can be 0.01 bar, 0.02 bar, 0.03 bar, 0.04 bar, 0.05 bar, 0.06 bar, 0.07 bar, 0.08 bar, 0.09 bar, 0.1 bar, 0.12 bar, 0.14 bar, 0.15 bar, 0.16 bar, 0.18 bar, 0.2 bar.

[0084] The temperature in the evaporation chamber 12 can be maintained at 15℃ to 50℃, and any one of them can be selected, for example, the temperature in the evaporation chamber 12 can be maintained at 15℃, 20℃, 25℃, 30℃, 35℃, 40℃, 45℃, 50℃.

[0085] The heating end 31 of the auxiliary heating device 30 is arranged in the evaporation chamber 12 for heating the evaporation chamber 12. The auxiliary heating device 30 can be a solar heating device, an electric heating device or a combination of solar and electric heating device.

[0086] The auxiliary heating device 30 can further comprise a hot water tank 32 which directly delivers hot water to the heating end 31, and the temperature of the hot water is higher than the temperature in the evaporation chamber 12.

[0087] In the working process of the water recovery system, sewage enters the tank 10 through the water inlet pipe 13, the collected clean water enters the water collecting device 40, and the concentrated liquid or paste is discharged from the outlet 14 at the bottom of the tank 10.

[0088] In the working process of the water recovery system, sewage enters the tank 10 through the water inlet pipe 13, the collected clean water enters the water collecting device 40, and the concentrated liquid or paste is discharged from the outlet 14 at the bottom of the tank 10.

[0089] As shown in Figure 1 The condensing chamber 11 and the evaporating chamber 12 are of an integrated structure, and together constitute the body of the tank 10. It should be understood that this is only an exemplary illustration and does not constitute a substantial limitation on the application scenarios of the cold and heat control method for low-temperature evaporation provided by the present application. For example, the evaporating chamber 12 and the condensing chamber 11 are two separate chambers, and are connected through a pipeline, which also belongs to the application scenarios of the cold and heat control method for low-temperature evaporation provided by the present application.

[0090] Figure 2 is a flowchart of a cold and heat control method for a low-temperature evaporation water recovery system provided by an embodiment of the present application. The cold and heat control method can be executed on a local computing device or on a cloud server.

[0091] The cold and heat control method provided by the present application is applicable to a low-temperature evaporation water recovery system including a tank, a heat pump device, and an auxiliary heating device. The refrigeration end of the heat pump device is used to cool the condensing chamber of the tank. The heating end of the heat pump device and the auxiliary heating device are used to heat the evaporating chamber of the tank. The tank is subjected to vacuumization from the condensing chamber.

[0092] In combination with Figure 2 As shown in the figure, the cold and heat control method for a low-temperature evaporation water recovery system includes the following steps.

[0093] S201, obtaining a first temperature difference value between a set temperature and a current temperature of the condensing chamber.

[0094] The set temperature reflects the design condensing temperature.

[0095] The design condensing temperature refers to a parameter of the water recovery system, which can also be referred to as a rated condensing temperature, an optimal condensing temperature, etc. of the water recovery system.

[0096] The design condensing temperature is generally specified when the water recovery system is designed, or after the water recovery system is completed, the design condensing temperature can also be obtained through experiments to detect the condensing temperature that meets the requirements of power consumption and water production.

[0097] Generally, the design condensing temperature can be 5-15°C, for example, it can be 5°C, 6°C, 7°C, 8°C, 9°C, 10°C, 11°C, 12°C, 13°C, 14°C, or 15°C.

[0098] Generally, a water recovery system of one model corresponds to one water production, and generally has only one design condensing temperature. However, exceptions are not excluded, for example, the water recovery system has multiple gears of water production, or even continuous and gradual water production. In these exceptional cases, the water recovery system can correspond to multiple design condensing temperatures.

[0099] However, in any case, the set temperature in the embodiments of the present application reflects the design condensing temperature corresponding to the expected water production.

[0100] S202, determining the first output power of the heat pump device according to the first temperature difference based on the basic control algorithm.

[0101] The basic control algorithm refers to the basic control algorithm of the heat pump device, which is generally given by the supplier of the heat pump device.

[0102] The basic control algorithm includes but is not limited to a Proportion Integral Differential (PID) controller, a Linear Quadratic Regulator (LQR), etc.

[0103] In the case of determining the first output power of the heat pump device according to the first temperature difference based on the basic control algorithm, the control object of the heat pump device is actually the temperature of the condensing chamber.

[0104] That is, in the embodiments of the present application, although the refrigeration end of the heat pump device is to cool the condensing chamber and the heating end is to heat the evaporating chamber, only the temperature of the condensing chamber is controlled using the basic control algorithm of the heat pump device, and the temperature of the evaporating chamber is not controlled.

[0105] S203, determining the current condensing water flow corresponding to the current temperature according to the first correspondence between the condensing temperature and the condensing water flow.

[0106] The condensing temperature and the condensing water flow in the first correspondence are negatively correlated, that is, the lower the condensing temperature, the faster the condensation speed of water vapor in the condensing chamber, and the larger the condensing water flow.

[0107] The first correspondence is usually obtained through experiments. For example, maintain a condensing temperature unchanged, and continuously increase or decrease the water vapor flowing into the condensing chamber until the water vapor is just condensed and liquefied in the condensing chamber, and the humidity of the gas flowing out of the condensing chamber meets the design requirements. At this time, the condensing water flow is taken as the condensing water flow corresponding to the condensing temperature.

[0108] Alternatively, maintain a speed of water vapor flowing into the condensing chamber unchanged, and continuously adjust the condensing amplitude until the water vapor is just condensed and liquefied in the condensing chamber, and the humidity of the gas flowing out of the condensing chamber meets the design requirements. At this time, the condensing temperature is taken as the condensing temperature corresponding to the condensing water flow.

[0109] In this way, under the first correspondence, the humidity of the gas drawn out of the top end of the tank meets the design requirements, which indicates that the continuous evaporation-condensation process in the water recovery system is in a dynamic balance process.

[0110] S204, determining a second output power according to the current condensate flow and the first output power.

[0111] The second output power is a power used to control the heat pump device. In the embodiments of the present application, the first output power output by the basic control algorithm of the heat pump device is not directly used to control the heat pump device, but the first output power is adjusted according to the current condensate flow to obtain the second output power, and the obtained second output power is used to control the heat pump device.

[0112] The second output power is positively correlated with the current condensate flow and the first output power. In this way, the greater the current condensate flow, the more heat is taken away by the condensing chamber, and at the same time, the greater the second output power, so as to increase the refrigeration capacity and compensate for the heat taken away by the condensate, which is beneficial to effectively control the current temperature of the condensing chamber in the process of continuous evaporation and condensation.

[0113] S205, determining a future temperature according to the current temperature and its change rate.

[0114] S206, determining a future condensate flow corresponding to the future temperature.

[0115] Here, the future condensate flow determined by the future temperature is also based on the first corresponding relationship.

[0116] S207, determining a future evaporation heat absorption flow corresponding to the future condensate flow according to a second corresponding relationship between the condensate flow and the evaporation heat absorption flow.

[0117] The second corresponding relationship is determined according to the working condition of the evaporation chamber, and can be determined based on the liquid enthalpy and vapor enthalpy of water as shown in Table 1.

[0118] Table 1: Liquid enthalpy and vapor enthalpy of water

[0119]

[0120] Specifically, the corresponding heat of vaporization is found in Table 1 according to the pressure of the evaporation chamber, and the product of the condensate flow and the heat of vaporization is used as the evaporation heat absorption flow in the second corresponding relationship.

[0121] Alternatively, the second corresponding relationship itself exists in the form of a formula, and its independent variable is the pressure / temperature of the evaporation chamber and the condensate flow, and its dependent variable is the evaporation heat absorption flow.

[0122] S208, determining a first heating flow of the heating end of the heat pump device according to the second output power.

[0123] The second output power is the input power of the heat pump device, and the first heating flow of the heating end is the output effect of the heat pump device. For any specific heat pump device, the energy conversion efficiency is known and can be determined by the relevant instructions provided by the supplier of the heat pump device.

[0124] S209, determining the second heating flow according to the future evaporation heat absorption flow and the first heating flow.

[0125] The second heating flow is positively correlated with the future evaporation heat absorption flow, and the second heating flow is negatively correlated with the first heating flow.

[0126] The above S205 to S208 are based on the prediction of the future temperature, and the future condensate flow is matched with the future temperature to obtain the second heating flow. When the evaporation chamber generates water vapor under the action of the second heating flow, a certain time is needed for the water vapor to enter the condensation chamber from the evaporation chamber, so that the water vapor concentration of the condensation chamber is increased, the condensation rate is increased, and the condensate flow is increased. This is adapted to the future temperature of the condensation chamber, which can make the temperature of the condensation chamber be stably controlled by the predetermined control strategy.

[0127] S210, controlling the heat pump device according to the second output power and controlling the auxiliary heating device according to the second heating flow.

[0128] For any water recovery system that has been produced, the structure of the condensation chamber cannot be changed, and it has a designed vacuum degree, that is, the evaporation temperature of the evaporation chamber is a constant value, in this case, the condensation temperature and the condensate flow have a one-to-one correspondence, that is, the first correspondence.

[0129] The set temperature of the condensation chamber reflects the design condensation temperature, and under the first correspondence, the set temperature can reflect the design condensation rate. The present scheme controls the current temperature of the condensation chamber according to the set temperature, which is also to control the condensation rate of the condensation chamber. In the presence of interference, the current temperature of the condensation chamber is dynamically stabilized at the set temperature, that is, the current condensate flow is dynamically stabilized at the design condensate flow.

[0130] In the working process of the water recovery system, water continuously evaporates and condenses, and the condensate is produced by the condensation and liquefaction of water vapor in the condensation chamber. The condensate flow is directly related to the condensation and liquefaction rate of water vapor in the condensation chamber. A large amount of heat is released when water vapor condenses and liquefies into liquid water. Based on this, the condensate flow actually reflects the heat release of the environment around the refrigeration end in the condensation chamber.

[0131] The second output power is determined according to the current condensate flow and the first output power, that is, the first output power output by the basic control algorithm is incrementally compensated according to the actual environment. Specifically, the first output power is incrementally compensated according to the continuous heat release of the environment around the refrigeration end. In particular, during the process of cooling the refrigeration end, such incremental compensation can enable the refrigeration end of the heat pump device to reach the set temperature from the current temperature in a relatively stable manner under such an environment.

[0132] At the same time, since the heating end of the heat pump device is used to heat the evaporation chamber, after the incremental compensation of the first output power, the heating end of the heat pump device generates more heat, which will have the following trend: the evaporation chamber generates more water vapor, and more water vapor will be condensed in the condensation chamber, which will not only cause the vacuum pump to suck too much moisture, but also cause the temperature of the condensation chamber to rise, which is not conducive to the temperature control of the condensation chamber.

[0133] The method controls the auxiliary heating device based on the matching relationship between the condensate flow and the condensation temperature, so that the evaporation rate of the evaporation chamber matches the condensate flow and the condensation temperature, and then the set temperature of the condensation chamber is adjusted steadily.

[0134] Specifically, the future temperature represents the future condensate flow, which is obtained by condensing water vapor, and the water vapor is obtained by evaporation in the evaporation chamber. Therefore, the future condensate flow represents the future evaporation heat absorption flow.

[0135] The second heating flow is determined according to the future evaporation heat absorption flow and the first heating flow, which can match the first heating flow and the second heating flow with the evaporation heat absorption flow, and then match the evaporation rate of the evaporation chamber with the future condensate flow, that is, with the water vapor condensation rate of the condensation chamber.

[0136] The temperature control process of the condensation chamber is based on this water vapor condensation rate, so the temperature control process of the condensation chamber can be stable, and the water recovery system can adjust the condensation temperature of the condensation chamber steadily based on the dynamic balance between the evaporation speed and the condensation rate, and finally make the current temperature of the condensation chamber reach the set temperature, and make the entire water recovery system reach the design condensation rate.

[0137] Based on the above process, when there is external interference, the present scheme can balance the evaporation amount and the condensation amount of the water recovery system, reduce the adverse effect on the vacuum pump, or reduce the refrigerant required for drying, and after the interference, the present scheme can also enable the entire water recovery system to return to the design condensation rate.

[0138] The following further describes the manner of obtaining the second output power.

[0139] Optionally, the second output power is determined according to the current condensate water flow and the first output power, including:

[0140] According to the liquid enthalpy and the vapor enthalpy of water, a current heat release flow in a phase change process of water vapor corresponding to the current condensate water flow is determined, and the second output power is determined according to the current heat release flow and the first output power.

[0141] For example, a sum of the current heat release flow and the first output power is taken as the second output power, or a weighted sum of the current heat release flow and the first output power is taken as the second output power.

[0142] Further, the second output power is determined according to the current heat release flow and the first output power, including: a first product of the current heat release flow and the first heat conduction rate is calculated, a current conduction heat release flow from the refrigeration end surface to the refrigeration end interior in the air environment is determined according to the first product, and the second output power is determined according to a sum of the current conduction heat release flow and the first output power.

[0143] The first conduction rate refers to a rate of heat conduction from the refrigeration end surface to the refrigeration end interior in the air environment. The greater the current heat release flow is, the greater the first product is, and the greater the current conduction heat release flow is.

[0144] The sum of the current conduction heat release flow and the first output power can be taken as the second output power, or a weighted sum of the current conduction heat release flow and the first output power can be taken as the second output power.

[0145] Optionally, the second output power is determined according to the current condensate water flow and the first output power, including:

[0146] According to the liquid enthalpy and the vapor enthalpy of water, a current heat release flow in a phase change process of water vapor corresponding to the current condensate water flow is determined;

[0147] A first change rate of the current heat release flow is obtained, and a future heat release flow after a first set time length is determined according to the current heat release flow and the first change rate. The first set time length is determined according to a sum of a first response time length and a first heat conduction time length. The first response time length is a time length required for the heating end of the heat pump device to change after the power changes to the heat absorption flow changes. The first heat conduction time length is a time length required for heat conduction from the refrigeration end surface to the interior in the air environment.

[0148] The second output power is determined according to a sum of the first output power and the future heat release flow.

[0149] For example, a sum of the first output power and the future heat release flow is taken as the second output power, or a weighted sum of the first output power and the future output power is taken as the second output power.

[0150] The current condensation water flow is an external disturbance to the temperature control process of the condensation chamber, which is a result of controlling the heat pump device according to the second output power and controlling the auxiliary heating device according to the second heating flow in the previous control period. After the temperature of the condensation chamber and the heating amount of the evaporation chamber are controlled based on the first corresponding relationship, the external disturbance is consistent with the temperature change of the condensation chamber, so that the future heat release flow calculated according to the current heat release flow can be equivalent to the differential algorithm of the variation in the PID control for the temperature control process of the condensation chamber, which is conducive to the stability of the temperature control process of the condensation chamber.

[0151] Optionally, the second output power is determined according to the sum of the first output power and the future heat release flow, including: calculating a first product of the future heat release flow and the first heat conduction rate; determining a future conduction heat release flow conducted from the refrigeration end surface to the inside of the refrigeration end in the air environment corresponding to the future heat release flow according to the first product; and determining the second output power according to the sum of the future conduction heat release flow and the first output power.

[0152] The sum of the future conduction heat release flow and the first output power can be taken as the second output power, or the weighted sum of the future conduction heat release flow and the first output power can be taken as the second output power.

[0153] Optionally, the second output power is determined according to the current condensation water flow and the first output power, including:

[0154] A second temperature difference value of the current evaporation temperature of the evaporation chamber and the current temperature of the condensation chamber is obtained.

[0155] The second temperature difference value is mapped to a heat error cumulative value.

[0156] The second output power is determined according to the sum of the first output power, the current heat release flow and the heat error cumulative value.

[0157] The sum of the first output power, the current heat release flow and the heat error cumulative value can be taken as the second output power, or the weighted sum of the first output power, the current heat release flow and the heat error cumulative value can be taken as the second output power.

[0158] In the process of mapping the second temperature difference value to the heat error cumulative value, the greater the second temperature difference value, the greater the heat error cumulative value; and / or the greater the condensation water flow, the greater the heat error cumulative value.

[0159] Further, a retention mass of water vapor retained in the water recovery system is obtained, and the results of the retention mass, the specific heat capacity of the water vapor and the second temperature difference value are taken as the heat error cumulative value.

[0160] The temperature of the water vapor is equal to the temperature of the evaporation chamber when the water vapor is just generated in the evaporation chamber, and the temperature of the water vapor is equal to the temperature of the condensation chamber when the water vapor is condensed and liquefied into water in the condensation chamber. This process not only includes the phase change process of water, but also includes the temperature reduction process. In this embodiment, the temperature reduction process in the evaporation-condensation is used as the integral algorithm of the variation in the PID control to maintain the stability of the condensation chamber temperature control process under the following working conditions:

[0161] The heat released by the temperature reduction in the evaporation-condensation needs to be absorbed by the refrigeration end in the condensation chamber. The more the temperature is reduced, the more heat the condensation chamber needs to absorb.

[0162] Further, the combination of the differential algorithm and the integral algorithm of the variation in the PID control is as follows: the second output power is determined according to the current condensation water flow and the first output power, which includes:

[0163] According to the liquid enthalpy and the vapor enthalpy of water, the current heat release flow of the water vapor in the phase change process of being liquefied into water corresponding to the current condensation water flow is determined; the first change rate of the current heat release flow is obtained, and the future heat release flow after the first set time length is determined according to the current heat release flow and the first change rate;

[0164] The second temperature difference value of the current evaporation temperature of the evaporation chamber and the current temperature of the condensation chamber is obtained; and the second temperature difference value is mapped to a heat error cumulative value;

[0165] The second output power is determined according to the sum of the first output power, the future heat release flow, and the heat error cumulative value.

[0166] The sum of the first output power, the future heat release flow, and the heat error cumulative value can be used as the second output power, and the weighted sum of the first output power, the future heat release flow, and the heat error cumulative value can be used as the second output power.

[0167] Alternatively, the second output power is determined according to the sum of the first output power, the future heat release flow, and the heat error cumulative value, which includes: calculating a first product of the future heat release flow and the first heat conduction rate; determining a future conduction heat release flow from the surface of the refrigeration end to the inside of the refrigeration end in the air environment corresponding to the future heat release flow according to the first product; and determining the second output power according to the sum of the future conduction heat release flow, the first output power, and the heat error cumulative value.

[0168] The sum of the first output power, the future conduction heat release flow, and the heat error cumulative value can be used as the second output power, and the weighted sum of the first output power, the future conduction flow, and the heat error cumulative value can be used as the second output power.

[0169] The cold-heat control method for the low-temperature water recovery system provided by the embodiments of the present application comprises two mutually coordinated control processes: a temperature control process for the condensing chamber and a heating control process for the evaporating chamber.

[0170] The temperature control process for the condensing chamber is exemplarily described in the foregoing embodiments, and the heating control process for the evaporating chamber is further exemplarily described below.

[0171] Optionally, determining the future temperature according to the current temperature and the change rate thereof comprises: determining the future temperature after a second set time length according to the current temperature and the change rate thereof.

[0172] The second set time length is negatively correlated with the current condensate water flow. The greater the current condensate water flow is, the more water vapor evaporated in the evaporating chamber, and the higher the water vapor concentration in the evaporating chamber is. In this case, the water vapor is more likely to enter the condensing chamber, the time length required from the generation of water vapor to condensation is shorter, and the time length required for the change of the heating power of the evaporating chamber to affect the temperature control process of the condensing chamber is shorter.

[0173] Optionally, determining the second heating flow according to the first heat flow difference between the future evaporative heat absorption flow and the first heating flow comprises: determining the second heating flow according to the first heat flow difference between the future evaporative heat absorption flow and the first heating flow.

[0174] The first heat flow difference can be taken as the second heating flow, or the first heating flow can be finely adjusted by increasing or decreasing, and the fine adjustment result can be taken as the second heating flow.

[0175] Optionally, determining the second heating flow according to the first heat flow difference between the future evaporative heat absorption flow and the first heating flow comprises: calculating a second product of the first heating flow and the second conduction rate; determining a conduction heating flow from the inside of the heating end to the surface of the heating end according to the second product; and determining the second heating flow according to the first heat flow difference between the future evaporative heat absorption flow and the conduction heating flow.

[0176] In the process of continuously adding sewage, considering the changes of the sewage flow and the sewage temperature, determining the second heating flow according to the first heat flow difference between the future evaporative heat absorption flow and the first heating flow can comprise:

[0177] The evaporating temperature of the evaporating chamber and the tank inlet water temperature and the inlet water flow are obtained.

[0178] The required heat flow is determined according to the second temperature difference between the evaporating temperature and the inlet water temperature and the inlet water flow.

[0179] The second heat flow difference is obtained by subtracting the required heat flow from the first heat flow.

[0180] determine the second heating flow according to the second heat flow difference.

[0181] Thus, the cold and heat control method for the low-temperature evaporation water recovery system can still be stably performed in the case of sewage flow and sewage temperature changes.

[0182] Figure 3 is a schematic diagram of a cold and heat control device for a low-temperature evaporation water recovery system provided by an embodiment of the present application. The cold and heat control device can be realized in the form of software, hardware, or a combination of both.

[0183] The water recovery system to which the cold and heat control device is applied includes a tank, a heat pump device, and an auxiliary heating device. The refrigeration end of the heat pump device is used to cool the condensation chamber at the top of the tank. The heating end of the heat pump device and the auxiliary heating device are used to heat the evaporation chamber of the tank. The tank is subjected to vacuumization from the condensation chamber.

[0184] In combination with Figure 3 As shown in the figure, the cold and heat control device for the low-temperature evaporation water recovery system includes an obtaining module 301, a first determining module 302, a second determining module 303, a third determining module 304, a fourth determining module 305, a fifth determining module 306, a sixth determining module 307, a seventh determining module 308, an eighth determining module 309, and a control module 310.

[0185] The obtaining module 301 is used to obtain a first temperature difference value of the set temperature and the current temperature of the condensation chamber. The set temperature reflects the design condensation temperature.

[0186] The first determining module 302 is used to determine the first output power of the heat pump device according to the first temperature difference value based on a basic control algorithm.

[0187] The second determining module 303 is used to determine the current condensation water flow corresponding to the current temperature according to a first corresponding relationship between the condensation temperature and the condensation water flow. The condensation temperature and the condensation water flow in the first corresponding relationship are negatively correlated.

[0188] The third determining module 304 is used to determine the second output power according to the current condensation water flow and the first output power. The second output power is positively correlated with the current condensation water flow and the first output power.

[0189] The fourth determining module 305 is used to determine the future temperature according to the current temperature and the rate of change thereof.

[0190] The fifth determining module 306 is used to determine the future condensation water flow corresponding to the future temperature according to the first corresponding relationship.

[0191] The sixth determining module 307 is used to determine the future evaporation heat absorption flow according to the future condensation water flow.

[0192] The seventh determining module 308 is configured to determine the first heating flow of the heating end of the heat pump device according to the second output power;

[0193] The eighth determining module 309 is configured to determine the second heating flow according to the future evaporation heat absorption flow and the first heating flow; the second heating flow is positively correlated with the future evaporation heat absorption flow, and the second heating flow is negatively correlated with the first heating flow.

[0194] The control module 310 is configured to control the heat pump device according to the second output power and control the auxiliary heating device according to the second heating flow.

[0195] Each module performs each step of the cold and heat control method of the low-temperature evaporation water recovery system provided in the foregoing embodiments, and the descriptions of each step of the cold and heat control method provided in the foregoing embodiments are also applicable to each module of the cold and heat control device. Therefore, the step performed by each module will not be repeatedly described herein.

[0196] In some embodiments, the cold and heat control device for the low-temperature evaporation water recovery system includes a processor and a memory storing program instructions, and the processor is configured to execute the cold and heat control method for the low-temperature evaporation water recovery system provided in the foregoing embodiments when executing the program instructions.

[0197] In some embodiments, the cold and heat control system for the low-temperature evaporation water recovery system includes the cold and heat control device for the low-temperature evaporation water recovery system provided in the foregoing embodiments.

[0198] As shown in Figure 4 The cold and heat control device for the low-temperature evaporation water recovery provided in the embodiments of the present application includes:

[0199] The processor 41 and the memory 42 can also include a communication interface 43 and a bus 44. The processor 41, the communication interface 43, and the memory 42 can communicate with each other through the bus 44. The communication interface 43 can be used for information transmission. The processor 41 can call the logical instructions in the memory 42 to execute the cold and heat control method for the low-temperature evaporation water recovery system provided in the foregoing embodiments.

[0200] In addition, the logical instructions in the memory 42 described above can be implemented in the form of a software functional unit and sold or used as an independent product, which can be stored in a computer-readable storage medium.

[0201] The memory 42 can be used to store software programs, computer executable programs, such as program instructions / modules corresponding to the method in the embodiments of the present application. The processor 41 executes the functions and data processing, i.e., implements the method in the above-mentioned method embodiments, by running the software programs, instructions and modules stored in the memory 42.

[0202] The memory 42 can include a program storage area and a data storage area, wherein the program storage area can store an operating system and at least one application required by a function; the data storage area can store data created according to the use of the terminal device, etc. In addition, the memory 42 can include a high-speed random access memory, and can also include a non-volatile memory.

[0203] The embodiments of the present application provide a computer readable storage medium, which stores computer executable instructions, and the computer executable instructions are configured to execute the cold and heat control method for the low-temperature evaporation water recovery system provided in the foregoing embodiments.

[0204] The embodiments of the present application provide a computer program product, which includes a computer program stored on a computer readable storage medium, and the computer program includes program instructions, and when the program instructions are executed by a computer, the computer executes the cold and heat control method for the low-temperature evaporation water recovery system provided in the foregoing embodiments.

[0205] The computer readable storage medium described above can be a transitory computer readable storage medium or a non-transitory computer readable storage medium.

[0206] The technical solutions of the embodiments of the present application can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes one or more instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method in the embodiments of the present application. The storage medium described above can be a non-transitory storage medium, including a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc. various media that can store program codes, or can be a transitory storage medium.

[0207] The foregoing description and accompanying drawings fully illustrate embodiments of this application to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Additionally, when used in this application, the terms “comprise” and its variations “comprises” and / or “comprising” refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Unless otherwise specified, an element defined by the phrase "comprising a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes that element. In this document, each embodiment may focus on describing the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, then the relevant parts can be referred to the description of the method section.

[0208] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0209] In the embodiments disclosed herein, the disclosed methods, products (including but not limited to apparatuses, devices, etc.), can be implemented in other manners. For example, the apparatus embodiments described above are merely schematic. For example, the division of the units is merely logical function division. There can be another division manner for the actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, apparatuses, or units, and can be in electrical, mechanical, or other forms. The unit illustrated as a separate component can or can not be physically separate, and can or can not be a physical component. Some or all of the units can be selected according to actual needs to implement the embodiments. In addition, the units in the embodiments disclosed herein can be integrated into one processing unit, or each unit can exist physically as separated, or two or more units can be integrated in one unit.

[0210] The flowcharts and block diagrams in the drawings show the possible architectural, functional, and operational aspects of systems, methods, and computer program products according to the embodiments of the present application. In this regard, each block in the flowcharts or block diagrams can represent a module, a program segment, or a portion of code that contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions noted in the blocks can occur in a different order than that shown in the drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and they can also be executed in reverse order, depending on the functions involved. Each block in the block diagrams and / or flowcharts, and the combination of blocks in the block diagrams and / or flowcharts, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for controlling the temperature and humidity of a low-temperature evaporation water recovery system, characterized in that, The water recovery system includes a tank, a heat pump unit, and an auxiliary heating unit; the cooling end of the heat pump unit is used to cool the condensation chamber of the tank; the heating end of the heat pump unit and the auxiliary heating unit are used to heat the evaporation chamber of the tank; the tank undergoes vacuum treatment from the condensation chamber; the heating and cooling control method includes: Obtain the first temperature difference between the set temperature and the current temperature of the condensing chamber; the set temperature reflects the designed condensing temperature; The first output power of the heat pump device is determined by the first temperature difference based on the basic control algorithm. The current condensate flow rate corresponding to the current temperature is determined based on the first correspondence between condensation temperature and condensate flow rate; the condensation temperature and condensate flow rate in the first correspondence are negatively correlated. The second output power is determined based on the current condensate flow rate and the first output power; the second output power is positively correlated with the current condensate flow rate and the first output power. Determine future temperatures based on current temperatures and their rate of change; Determine the future condensate flow rate corresponding to the future temperature based on the first correspondence; Determine the future evaporation heat absorption flow rate based on the future condensate flow rate; The first heating flow rate of the heating end of the heat pump device is determined based on the second output power. The second heating flow rate is determined based on the future evaporation heat absorption flow rate and the first heating flow rate; the second heating flow rate is positively correlated with the future evaporation heat absorption flow rate, and the second heating flow rate is negatively correlated with the first heating flow rate; The heat pump device is controlled according to the second output power, and the auxiliary heating device is controlled according to the second heating flow rate.

2. The heating and cooling control method according to claim 1, characterized in that, The second output power is determined based on the current condensate flow rate and the first output power, including: Based on the liquid enthalpy and vapor enthalpy of water, determine the current heat release flow rate of water vapor during the phase change process of liquefaction into water corresponding to the current condensate flow rate; The first rate of change of the current heat release flow rate is obtained, and the future heat release flow rate after a first set time period is determined based on the current heat release flow rate and the first rate of change. The first set time period is determined based on the sum of the first response time period and the first heat conduction time period. The first response time period is the time required for the heat pump device to change from a power change to a heat absorption flow rate change at the heating end. The first heat conduction time period is the time required for heat to be conducted from the surface of the cooling end to the interior in the air environment. The second output power is determined based on the sum of the first output power and the future heat release flow rate.

3. The method for controlling hot and cold temperatures according to claim 2, characterized in that, The second output power is determined based on the sum of the first output power and the future heat release flow rate, including: Calculate the first product of the future heat release flow rate and the first heat conduction rate; The future conduction heat release flow rate from the surface of the cooling end to the interior of the cooling end in the air environment corresponding to the future heat release flow rate is determined based on the first product. The second output power is determined based on the sum of the future heat transfer flow rate and the first output power.

4. The method for controlling hot and cold temperatures according to claim 1, characterized in that, The second output power is determined based on the current condensate flow rate and the first output power, including: Obtain a second temperature difference between the current evaporation temperature of the evaporation chamber and the current temperature of the condensation chamber; The second temperature difference is mapped to a cumulative heat error value; The second output power is determined based on the sum of the first output power, the current heat release flow rate, and the cumulative value of heat error.

5. The heating and cooling control method according to any one of claims 1 to 4, characterized in that, Determining future temperatures based on current temperatures and their rate of change includes: The future temperature after a second set time period is determined based on the current temperature and its rate of change; wherein, the second set time period is negatively correlated with the current condensate flow rate; The second heating flow rate is determined based on the future evaporation heat absorption flow rate and the first heating flow rate, including: The second heating flow rate is determined based on the difference between the future evaporation heat absorption flow rate and the first heat flow rate.

6. The heating and cooling control method according to claim 5, characterized in that, The second heating flow rate is determined based on the difference between the future evaporation heat absorption flow rate and the first heating flow rate, including: Calculate the second product of the first heating flow rate and the second conduction velocity; The first heating flow rate is determined by the conduction heating flow rate from the inside of the heating end to the surface of the heating end based on the second product; The second heating flow rate is determined based on the difference between the future evaporation heat absorption flow rate and the conduction heat production flow rate.

7. The heating and cooling control method according to claim 5, characterized in that, The second heating flow rate is determined based on the difference between the future evaporation heat absorption flow rate and the first heating flow rate, including: Obtain the evaporation temperature of the evaporation chamber, as well as the inlet water temperature and flow rate of the tank; The required heat flow rate is determined based on the second temperature difference between the evaporation temperature and the inlet water temperature, as well as the inlet water flow rate. The difference between the first heat flow rate and the required heat flow rate is obtained by subtracting the required heat flow rate from the first heat flow rate. The second heating flow rate is determined based on the difference between the second heat flow rates.

8. A heating and cooling control device for a low-temperature evaporation water recovery system, characterized in that, The water recovery system includes a tank, a heat pump unit, and an auxiliary heating unit; the cooling end of the heat pump unit is used to cool the condensation chamber of the tank; the heating end of the heat pump unit and the auxiliary heating unit are used to heat the evaporation chamber of the tank; the tank is evacuated from the condensation chamber; the heating and cooling control device includes: The module is used to obtain the first temperature difference between the set temperature and the current temperature of the condensation chamber; the set temperature reflects the designed condensation temperature. The first determining module is used to determine the first output power of the heat pump device based on the first temperature difference according to the basic control algorithm; The second determining module is used to determine the current condensate flow rate corresponding to the current temperature based on the first correspondence between condensate temperature and condensate flow rate; the condensate temperature and condensate flow rate in the first correspondence are negatively correlated. The third determining module is used to determine the second output power based on the current condensate flow rate and the first output power; the second output power is positively correlated with the current condensate flow rate and the first output power. The fourth determination module is used to determine the future temperature based on the current temperature and its rate of change. The fifth determining module is used to determine the future condensate flow rate corresponding to the future temperature based on the first correspondence. The sixth determining module is used to determine the future evaporation heat absorption flow rate based on the future condensate flow rate; The seventh determining module is used to determine the first heating flow rate at the heating end of the heat pump device based on the second output power; The eighth determining module is used to determine the second heating flow rate based on the future evaporation heat absorption flow rate and the first heating flow rate; the second heating flow rate is positively correlated with the future evaporation heat absorption flow rate and negatively correlated with the first heating flow rate; The control module is used to control the heat pump device according to the second output power and to control the auxiliary heating device according to the second heating flow rate.

9. A heating and cooling control device for a low-temperature evaporation water recovery system, comprising a processor and a memory storing program instructions, characterized in that, The processor is configured to, when executing the program instructions, perform the heating and cooling control method for a low-temperature evaporation water recovery system as described in any one of claims 1 to 7.

10. A heating and cooling control system for a low-temperature evaporation water recovery system, characterized in that, Includes the heating and cooling control device for a low-temperature evaporation water recovery system as described in claim 8 or 9.

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