Air conditioner indoor unit, air conditioner and refrigerating system control method

Abstract

The invention discloses an air conditioner indoor unit, an air conditioner and a refrigerating system control method.The air conditioner indoor unit comprises an evaporator and further comprises a water pan, a pulsating heat pipe and a condensate water subsurface cooling recycling device, the water pan is used for collecting condensate water generated when air is condensed through the evaporator, and the condensate water subsurface cooling recycling device comprises a water tank and a water pumping assembly; one end of the water pumping assembly is connected to the water pan, the other end of the water pumping assembly is connected to the water tank, the water pumping assembly is used for pumping condensate water collected in the water pan into the water tank, and the condensation end of the pulsating heat pipe is arranged in the water tank. The condensate water subsurface cooling recycling device is used for collecting and recycling condensate water, waste of subsurface cooling resources is reduced, and meanwhile the condensate water can be prevented from flowing out of the air outlet and being discharged to the indoor side; meanwhile, the pulsating heat pipe is adopted, the condensation end of the pulsating heat pipe is used for heat dissipation, the refrigeration efficiency is improved, natural circulation and refrigeration circulation are matched, the operation time of the compressor is shortened, and the purposes of saving energy and reducing consumption are achieved.

Description

Technical Field

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

[0002] Air conditioners are an electrical product widely used in people's lives. Air conditioners play an important role in regulating indoor temperature. They can provide users with a healthy and comfortable indoor environment and meet their normal work, life and study needs.

[0003] In the prior art, when the air conditioner is turned on in cooling mode, condensed water will be generated on the surface of the evaporator, and the condensed water will usually flow into the water receiving tray. However, after the condensed water is generated, the existing air conditioner indoor unit will directly discharge it to the outside through the pipeline without being collected and utilized, and the cooling capacity it carries is not effectively utilized, resulting in serious waste of resources; and nowadays, the requirements for the appearance of buildings have been continuously improved. If the condensed water is stored in the outdoor unit of the air conditioner for reuse, the flow resistance in the pipe will increase, making it difficult for part of the condensed water to be discharged, and it will be retained in the bottom shell of the air conditioner indoor unit. In severe cases, it will cause dirt to form inside the bottom shell and breed bacteria, which may affect the normal use of the air conditioner indoor unit.

[0004] In summary, the condensed water produced by the condensation of air through the evaporator cannot be effectively utilized, and the heat dissipation load of the air conditioner outdoor unit increases after working for a long time, resulting in reduced refrigeration efficiency and increased overall energy consumption. Summary of the invention

[0005] The purpose of the present invention is to provide an air conditioner indoor unit, an air conditioner and a refrigeration system control method, aiming to solve the problem that the condensed water of the current air conditioner cannot be effectively utilized, the refrigeration efficiency is reduced, and the energy consumption is high.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0007] The present invention provides an air conditioner indoor unit, comprising an evaporator, a water receiving pan, a pulsating heat pipe and a condensed water latent cooling recovery and utilization device, wherein the water receiving pan is used to collect condensed water generated by condensation of air through the evaporator, and the condensed water latent cooling recovery and utilization device comprises a water tank and a pumping component; one end of the pumping component is connected to the water receiving pan, and the other end is connected to the water tank, the pumping component is used to pump the condensed water collected in the water receiving pan into the water tank, and the condensation end of the pulsating heat pipe is arranged in the water tank.

[0008] Optionally, the condensed water latent cooling recovery and utilization device further includes: a liquid level detection component disposed in the water receiving tray, for detecting the liquid level of the condensed water in the water receiving tray.

[0009] Optionally, the condensed water latent cooling recovery and utilization device also includes: a water storage component, the water storage component having a water inlet and a water outlet, the other end of the pumping component is connected to the water inlet, the water outlet is connected to the water tank, and the height of the water storage component is higher than the height of the water tank.

[0010] Optionally, the condensed water latent cooling recovery and utilization device further includes: a temperature sensor and a water level sensor, wherein the temperature sensor and the water level sensor are both arranged in the water tank and are used to detect the temperature and liquid level of the condensed water in the water tank, respectively.

[0011] The present invention further provides an air conditioner, comprising an air conditioner outdoor unit, wherein the air conditioner outdoor unit is provided with a compressor, and also comprising an air conditioner indoor unit as described in any one of the above items.

[0012] The present invention also provides a refrigeration system control method, which is applied to the air conditioner as described above, comprising:

[0013] When the air conditioner is in cooling operation, obtain the current indoor temperature and outdoor temperature;

[0014] Calculating a first difference between the outdoor temperature and the indoor temperature, and a second difference between the indoor temperature and a set temperature;

[0015] Comparing the relationship between the first difference, the second difference and a preset temperature value;

[0016] According to the comparison result, the air conditioner is controlled to adopt a pulsating heat pipe cooling mode and / or a compressor cooling mode.

[0017] Optionally, the preset temperature values ​​include a first preset temperature value x1, a second preset temperature value x2, a third preset temperature value y1, and a fourth preset temperature value y2; wherein x1 is smaller than x2, and y1 is smaller than y2;

[0018] According to the comparison result, controlling the air conditioner to adopt the pulsating heat pipe cooling mode and / or the compressor cooling mode comprises:

[0019] If the comparison result is that the first difference is less than or equal to x1 and the second difference is less than or equal to y1, the pulsating heat pipe cooling mode is started;

[0020] If the comparison result is that the first difference is greater than x1 and less than x2 and the second difference is greater than y1 and less than y2, the required cooling load is obtained, and if the cooling load is less than or equal to the preset load, the pulsating heat pipe cooling mode is started; if the cooling load is greater than the preset load, the compressor cooling mode is started;

[0021] If the comparison result is that the first difference is greater than or equal to x2 and the second difference is greater than or equal to y2, the required cooling load is obtained. If the cooling load is less than or equal to the preset load, the compressor cooling mode or the pulsating heat pipe cooling mode is started. If the cooling load is greater than the preset load, the pulsating heat pipe cooling mode and the compressor cooling mode are started at the same time.

[0022] Optionally, if the cooling load is less than or equal to a preset load, starting the pulsating heat pipe cooling mode includes:

[0023] After running for t1 time, the current indoor temperature is re-acquired and the second difference is updated. If the second difference is greater than or equal to y2, the compressor cooling mode is started. If the difference is less than y2, the pulsating heat pipe cooling mode is continued.

[0024] Optionally, after the step of controlling the air conditioner to adopt a pulsating heat pipe cooling mode and / or a compressor cooling mode according to the comparison result, the following steps are included:

[0025] After running for t2 time, the required cooling load is obtained, the current indoor temperature is re-obtained, and the second difference is updated;

[0026] If the required refrigeration load increases and the second difference increases, the output capacity of the refrigeration system is increased;

[0027] If the required refrigeration load decreases and the second difference decreases, the output capacity of the refrigeration system is reduced.

[0028] Optionally, the improving the output capacity of the refrigeration system includes: if only the pulsating heat pipe refrigeration mode is currently turned on, then turning on the compressor refrigeration mode; if both the pulsating heat pipe refrigeration mode and the compressor refrigeration mode are currently turned on or only the compressor refrigeration mode is turned on, then increasing the compressor frequency;

[0029] The reducing the output capacity of the refrigeration system includes: if only the pulsating heat pipe refrigeration mode is currently turned on, the pulsating heat pipe refrigeration mode is kept unchanged, and when the indoor temperature reaches the set temperature, the fan speed of the air conditioner indoor unit is reduced; if the pulsating heat pipe refrigeration mode and the compressor refrigeration mode are currently turned on at the same time or only the compressor refrigeration mode is turned on, the compressor frequency is reduced and continues to run, and when the indoor temperature is at the set temperature, the compressor refrigeration mode is turned off and the pulsating heat pipe refrigeration mode is turned on.

[0030] The embodiment of the present invention provides an indoor unit of an air conditioner, an air conditioner and a control method for a refrigeration system, wherein the indoor unit of the air conditioner includes an evaporator, a water receiving pan, a pulsating heat pipe and a condensed water latent cooling recovery device, the water receiving pan is used to collect condensed water generated by condensation of air through the evaporator, the condensed water latent cooling recovery device includes a water tank and a pumping assembly; one end of the pumping assembly is connected to the water receiving pan, and the other end is connected to the water tank, the pumping assembly is used to pump the condensed water collected in the water receiving pan into the water tank, and the condensation end of the pulsating heat pipe is arranged in the water tank. The present invention collects and reuses condensed water by using a condensed water latent cooling recovery device, thereby reducing the waste of latent cooling resources, and at the same time preventing condensed water from flowing out of the air outlet and being discharged to the indoor side; at the same time, a pulsating heat pipe is used, and the condensation end of the pulsating heat pipe is used to dissipate heat, increase heat exchange, improve refrigeration efficiency, realize the coordination of natural circulation and refrigeration cycle, reduce the running time of the compressor, and achieve the purpose of energy saving and consumption reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0032] Figure 1 A schematic diagram of the structural principle of an air conditioner provided by an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of the structural principle of a pulsating heat pipe and a condensed water latent cooling recovery and utilization device provided in an embodiment of the present invention;

[0034] Figure 3 A schematic diagram of a process for recycling condensed water latent cooling provided by an embodiment of the present invention;

[0035] Figure 4 A schematic flow chart of a refrigeration system control method provided by an embodiment of the present invention;

[0036] Figure 5 Another schematic diagram of a flow chart of a refrigeration system control method provided by an embodiment of the present invention;

[0037] Figure 6 Another schematic flow chart of a refrigeration system control method provided by an embodiment of the present invention;

[0038] Figure 7 A logic diagram of a refrigeration system control method provided in an embodiment of the present invention.

[0039] Description of the symbols in the figure:

[0040] 1. Air conditioner indoor unit; 11. Evaporator; 12. Water tray; 13. Pulsating heat pipe; 14. Condensate latent cooling recovery device; 141. Water tank; 142. Pumping assembly; 143. Indoor fan; 144. Liquid level detection assembly; 145. Water storage assembly; 1451. Water inlet; 1452. Water outlet; 146. Diversion hose; 147. Temperature sensor and water level sensor;

[0041] 2. Air conditioner; 21. Air conditioner outdoor unit; 211. Compressor; 212. Outdoor fan. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0044] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0045] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0046] See also Figure 1 and Figure 2 The present invention provides an air conditioner indoor unit 1, comprising an evaporator 11, a water receiving pan 12, a pulsating heat pipe 13 and a condensed water latent cooling recovery device 14, wherein the water receiving pan 12 is used to collect condensed water generated by condensation of air through the evaporator 11, and the condensed water latent cooling recovery device 14 comprises a water tank 141 and a pumping assembly 142; one end of the pumping assembly 142 is connected to the water receiving pan 12, and the other end is connected to the water tank 141, and the pumping assembly 142 is used to pump the condensed water collected in the water receiving pan 12 into the water tank 141, and the condensation end of the pulsating heat pipe 13 is arranged in the water tank 141. Specifically, the pumping assembly 142 can be a micro water suction pump.

[0047] Furthermore, the air conditioner indoor unit 1 also includes an indoor fan 143. During the air conditioning refrigeration operation, when the indoor fan 143 is running, air forms an airflow and enters from the air inlet of the side wall of the housing of the air conditioner indoor unit 1, and flows through the evaporator 11. When the air flows through the evaporator 11, the surface temperature of the evaporator 11 is relatively low, lower than the air dew point temperature, and the water vapor in the air condenses to form condensed water, which is gathered in the water receiving tray 12 under the action of gravity. In order not to directly discharge the generated condensed water and cause waste of latent cooling resources, in this embodiment, firstly, the condensed water latent cooling recovery and utilization device 14 is used in the air conditioner indoor unit 1 to collect the condensed water into the water tank 141 for reuse, thereby reducing the waste of latent cooling resources and preventing the condensed water from flowing out of the air outlet of the air conditioner indoor unit 1 and being discharged to the indoor side; then, the pulsating heat pipe 13 is used to dissipate heat by using the condensation end of the pulsating heat pipe 13, thereby increasing the heat exchange, improving the refrigeration efficiency, realizing the coordination of natural circulation and refrigeration cycle, reducing the operation time of the compressor 211, and achieving the purpose of energy saving and consumption reduction.

[0048] Pulsating Heat Pipe (PHP) is a highly efficient heat transfer device that utilizes the phase change (liquid to gas, gas to liquid) of a working fluid (such as water, alcohol, etc.) in a closed pipe and the resulting pressure fluctuations to achieve rapid heat transfer. In other words, during the circulation of the working fluid in the pulsating heat pipe, there is not only sensible heat transfer, but also phase change heat transfer (absorption of heat during phase change in the heating section and release of heat during phase change in the cooling section). The pulsating heat pipe has an evaporation section, a condensation section, and an insulation section.

[0049] Specifically, in the evaporation section of the pulsating heat pipe, due to the action of the heat source, the working fluid absorbs heat and evaporates into a gaseous state. In this process, the liquid working fluid is transformed into a gaseous state, the volume expands, and the pressure increases. Due to the increase in pressure in the evaporation section, a pressure difference is formed between the condensation section (the area with a lower temperature). This pressure difference drives the gaseous working fluid to flow to the condensation section. When the gaseous working fluid reaches the condensation section, due to the lower temperature, the working fluid will release heat and condense into a liquid state, the volume will shrink, and the pressure will decrease. After the pressure in the condensation section decreases, a pressure difference is formed again between the evaporation section, but this pressure difference is in the opposite direction. This reverse pressure difference will drive the liquid working fluid to flow back to the evaporation section through the adiabatic section (the area with relatively stable temperature, which mainly serves as a connection). In the adiabatic section, the working fluid mainly exists in liquid form, and the temperature does not change much. The above process is repeated continuously to form an evaporation-condensation-reflux cycle. During this cycle, heat is efficiently transferred between the evaporation section and the condensation section through the phase change and flow of the working fluid. At the same time, due to the continuous evaporation and condensation of the working fluid in the pipeline, periodic pressure fluctuations will occur, which helps to enhance the heat transfer effect.

[0050] It should be noted that the pulsating heat pipe has a small size, simple structure, no moving parts and low cost; the pulsating heat pipe can choose specific size and structure according to actual space and environmental requirements, the position of the evaporation section, condensation section and insulation section can be selected arbitrarily, and multiple evaporation sections, condensation sections and insulation sections can be bent at will.

[0051] Furthermore, the condensed water latent cooling recovery and utilization device 14 also includes: a liquid level detection component 144 disposed in the water receiving pan 12, for detecting the condensed water level in the water receiving pan 12. The water receiving pan 12 is disposed in the bottom shell of the air conditioner indoor unit 1. In order to prevent excessive condensed water from being retained in the water receiving pan 12, resulting in dirt and bacteria inside the bottom shell, in this embodiment, a liquid level detection component 144 is added to the bottom of the water receiving pan 12 to detect the change in the liquid level of the condensed water in the water receiving pan 12.

[0052] Specifically, the air conditioner indoor unit 1 also includes a controller, which is used to control the pumping component 142 to pump the condensed water. First, a liquid level height threshold is preset, and then the liquid level detection component 144 transmits the detected water level signal to the controller of the air conditioner indoor unit 1. When the liquid level in the water receiving tray 12 reaches the liquid level height threshold, the controller issues a command to control the pumping component 142 to start working and suck the condensed water into the water tank 141.

[0053] Furthermore, the condensed water latent cooling recovery and utilization device 14 also includes: a water storage component 145, the water storage component 145 has a water inlet 1451 and a water outlet 1452, the other end of the pumping component 142 is connected to the water inlet 1451, the water outlet 1452 is connected to the water tank 141, and the height of the water storage component 145 is higher than the height of the water tank 141. In this embodiment, a guide hose 146 is provided between the water storage component 145 and the pumping component 142, the other end of the pumping component 142 is connected to the water inlet 1451, and the pumping component 142 draws the condensed water in the water receiving tray 12 into the water inlet 1451 through the guide hose 146. The water storage component 145 is located between the pumping component 142 and the water tank 141, and stores condensed water. The water inlet 1451 on the water storage component 145 is connected to the other end of the pumping component 142, and is used to receive the condensed water sucked from the water receiving tray 12 through the pumping component 142. The water outlet 1452 on the water storage component 145 is connected to the water tank 141, and is used to discharge the condensed water stored in the water storage component 145 into the water tank 141, so as to provide heat exchange at the condensation end of the pulsating heat pipe 13.

[0054] Specifically, the height of the water storage assembly 145 is higher than the height of the water tank 141. This design has several significant advantages:

[0055] First, since the water storage component 145 is higher than the water tank 141, even when a temporary failure occurs in the water tank 141 or the pumping component 142, the condensed water can be effectively prevented from flowing back to the water receiving tray 12, thereby ensuring the stability and safety of the system; secondly, by utilizing the effect of gravity, the condensed water can flow more smoothly from the water storage component 145 into the water tank 141, thereby reducing the workload of the pumping component 142 and improving the operating efficiency of the air-conditioning system; finally, as an intermediate link, the water storage component 145 can balance the generation and consumption rates of condensed water to a certain extent, thereby providing a certain buffer time for the cooling of the pulsating heat pipe 13.

[0056] Furthermore, the condensed water latent cooling recovery device 14 also includes: a temperature sensor and a water level sensor 147, both of which are arranged in the water tank 141, and are used to detect the temperature and liquid level of the condensed water in the water tank 141 respectively.

[0057] In this embodiment, the temperature sensor can monitor the temperature of the condensed water in the water tank 141 in real time, and feed back the detected temperature data to the controller, which makes corresponding adjustments based on the temperature data to ensure the accuracy and real-time performance of the data. The water level sensor is also provided in the water tank 141 to detect the liquid level of the condensed water in the water tank 141. By real-time monitoring the liquid level of the condensed water in the water tank 141, it is ensured that the water tank 141 will not overflow due to excessively high liquid level, nor will it affect the normal operation of the air conditioning system due to excessively low liquid level.

[0058] The present invention further provides an air conditioner 2, comprising an air conditioner outdoor unit 21, wherein the air conditioner outdoor unit 21 is provided with a compressor 211, and further comprising the air conditioner indoor unit 1 as described in any one of the above items.

[0059] like Figure 3 As shown, it is a flow chart of condensed water latent cooling recycling. When the condensed water latent cooling is used to dissipate heat from the pulsating heat pipe condensing end, the condensing end is immersed in a water tank. The water tank is provided with a temperature sensor and a water level sensor. During the operation of the air conditioning system, the water temperature of the condensed water is detected in real time to ensure the best heat dissipation effect. The water temperature of the condensed water in the water tank at the time of startup is obtained, and the water temperature of the condensed water in the water tank at the current time is compared with the water temperature of the condensed water in the water tank at the time of startup. When the water temperature in the water tank changes greatly (i.e., the water temperature during operation - the water temperature at the time of startup>△T), the drain at the bottom of the water tank is opened to drain the condensed water after heat exchange. At the same time, the interface connected to the water storage component in the water tank is opened, and new condensed water is used to cool the pulsating heat pipe. At the same time, the liquid level in the water tank is ensured to be at the optimal position through water level detection, and the water temperature is ensured to be within the appropriate range through water temperature detection, so as to avoid excessive discharge or injection at one time, increase the pressure of the water tank, or cause waste of cooling capacity or insufficient cooling capacity.

[0060] See also Figure 4The present invention also provides a flow chart of a refrigeration system control method, the method comprising steps S101 to S104:

[0061] S101, when the air conditioner is in cooling operation, obtaining the current indoor temperature and outdoor temperature;

[0062] S102, calculating a first difference between the outdoor temperature and the indoor temperature, and a second difference between the indoor temperature and the set temperature;

[0063] S103, comparing the first difference, the second difference and a preset temperature value;

[0064] S104: According to the comparison result, the air conditioner is controlled to adopt a pulsating heat pipe cooling mode and / or a compressor cooling mode.

[0065] This embodiment is applied to an air conditioner. In this embodiment, when the air conditioner starts cooling operation, it first performs initialization settings, sets the set temperature, and obtains the current indoor temperature and outdoor temperature in real time. Then, the first difference (ΔT1) between the outdoor temperature and the indoor temperature is calculated, which can indicate the temperature difference between the current indoor and outdoor environments, and the second difference (ΔT2) between the indoor temperature and the set temperature is calculated, which can indicate the difference between the current indoor temperature and the set temperature. Then, the relationship between the first difference ΔT1, the second difference ΔT2 and the preset temperature value is compared to obtain different comparison results. According to the comparison results, the cooling mode to be adopted is determined, that is, the air conditioner is controlled to adopt the pulsating heat pipe cooling mode and / or the compressor cooling mode.

[0066] It should be noted that the indoor temperature and the outdoor temperature are continuously monitored during the cooling process.

[0067] Specifically, Figure 5 As shown, the step S104 includes steps S201 to S203:

[0068] S201, if the comparison result is that the first difference is less than or equal to x1 and the second difference is less than or equal to y1, start the pulsating heat pipe cooling mode;

[0069] S202, if the comparison result is that the first difference is greater than x1 and less than x2 and the second difference is greater than y1 and less than y2, then the required cooling load is obtained, if the cooling load is less than or equal to the preset load, the pulsating heat pipe cooling mode is started, if the cooling load is greater than the preset load, the compressor cooling mode is started;

[0070] S203. If the comparison result is that the first difference is greater than or equal to x2 and the second difference is greater than or equal to y2, the required cooling load is obtained. If the cooling load is less than or equal to the preset load, the compressor cooling mode is started or the pulsating heat pipe cooling mode is started. If the cooling load is greater than the preset load, the pulsating heat pipe cooling mode and the compressor cooling mode are started at the same time.

[0071] It should be noted that the preset temperature values ​​include a first preset temperature value x1, a second preset temperature value x2, a third preset temperature value y1, and a fourth preset temperature value y2; wherein x1 is smaller than x2, and y1 is smaller than y2.

[0072] In this embodiment, in step S201 of this embodiment, when the first difference ΔT1≤x1 and the second difference ΔT2≤y1, it means that the current ambient temperature difference is not large, that is, the first difference ΔT1 is small, and the second difference ΔT2 is small, that is, the indoor temperature is closer to the set temperature, and the difference between the two is less than or equal to the third preset temperature value y1. At this time, starting the pulsating heat pipe cooling mode is sufficient to maintain the stability of the indoor temperature and achieve energy saving effect. It should be noted that in this step, the required cooling load can also be obtained to monitor the cooling effect under the current cooling mode.

[0073] In step S202, when the first difference ΔT1 and the second difference ΔT2 are both in the middle range, that is, x1<ΔT1<x2, and y1<ΔT2<y2, it means that the ambient temperature difference and the difference between the indoor temperature and the set temperature are moderate. At this time, it is necessary to evaluate the size of the cooling load to determine the cooling mode that needs to be turned on.

[0074] To be clear, cooling load represents the amount of heat that needs to be removed in order to maintain the temperature of a specific space or equipment. In a refrigeration system, this is actually moving heat from one object or space to another to achieve the desired temperature.

[0075] When determining whether the cooling load is larger or smaller, first set a preset load and compare it with the currently required cooling load. If the cooling load is less than or equal to the preset load, it means that the current cooling demand is low and the pulsating heat pipe cooling mode is sufficient to cope with it. At this time, the air conditioner will operate in the pulsating heat pipe cooling mode and will not start high-power equipment such as the compressor to achieve energy saving. If the cooling load is greater than the preset load, it means that the current cooling demand is high and cannot be met by the pulsating heat pipe cooling mode alone. At this time, the air conditioner will start the compressor cooling mode to quickly lower the temperature and meet the cooling demand. The compressor cooling mode usually has a higher cooling capacity and a faster response speed, so there is no need to start the pulsating heat pipe cooling mode, but the compressor cooling mode will also consume more energy accordingly.

[0076] In step S203 of the present embodiment, when the first difference ΔT1≥x2 and the second difference ΔT2≥y2, it indicates that the ambient temperature difference is large (i.e., the first difference ΔT1 is large), and the second difference ΔT2 is higher than the fourth preset temperature value y2. At this time, if the cooling load is less than or equal to the preset load, one of the compressor cooling mode and the pulsating heat pipe cooling mode can be selected to start; if the cooling load is greater than the preset load, in order to quickly cool down and maintain the indoor temperature stable, the pulsating heat pipe cooling mode and the compressor cooling mode are started at the same time.

[0077] Furthermore, if the cooling load in step S202 is less than or equal to the preset load, the pulsating heat pipe cooling mode is started, including S301:

[0078] S301, after running for t1 time, re-acquire the current indoor temperature and update the second difference. If the second difference is greater than or equal to y2, start the compressor cooling mode. If the difference is less than y2, continue to maintain the pulsating heat pipe cooling mode.

[0079] In this embodiment, after starting the cooling mode, the air-conditioning system will first run for a period of time according to the currently selected cooling mode (it may be only starting the pulsating heat pipe cooling mode, or it may be only starting the compressor cooling mode). This time interval is t1. The set value of t1 can be adjusted according to actual conditions. After the t1 time is over, the air-conditioning system will re-obtain the current indoor temperature through the temperature sensor. That is to say, the indoor temperature is updated at this time, and the difference between the updated indoor temperature and the set temperature is recalculated, that is, the updated second difference ΔT2. The updated second difference ΔT2 is compared with the fourth preset temperature value y2. If the second difference is greater than or equal to y2, this indicates that although it has been running for a period of time, the second difference ΔT2 is still higher than the fourth preset temperature value y2, and a stronger cooling capacity is needed to quickly cool down. Therefore, the air conditioner starts the compressor cooling mode (if it has not been started before), or if the pulsating heat pipe cooling mode has been turned on, the compressor cooling mode can be increased (keep both turned on at the same time) or completely switched to the compressor cooling mode (only use the compressor cooling mode); if the difference is less than y2, this indicates that the difference between the indoor temperature and the set temperature has not widened, and the current cooling capacity is sufficient or excessive. Therefore, the air conditioner continues to maintain the pulsating heat pipe cooling mode to maintain the stability of the indoor temperature and further reduce energy consumption.

[0080] Further, such as Figure 6 As shown, after step S104, steps S401 to S403 are included:

[0081] S401, after running for t2 time, obtain the required cooling load, re-obtain the current indoor temperature, and update the second difference;

[0082] S402: if the required refrigeration load increases and the second difference increases, the output capacity of the refrigeration system is increased;

[0083] S403: If the required refrigeration load decreases and the second difference decreases, the output capacity of the refrigeration system is reduced.

[0084] In this embodiment, t2 is a preset time interval for regularly monitoring and evaluating the operating status of the refrigeration system. At the end of this time interval, the air conditioning system will perform a series of update operations, that is, the air conditioning system will re-acquire the current indoor temperature through the temperature sensor, that is, the indoor temperature is re-updated at this time, and the difference between the updated indoor temperature and the set temperature, that is, the updated second difference ΔT2, is recalculated, and the refrigeration load required for the current environment is re-acquired, and the required refrigeration load at this time and the second difference are determined to increase or decrease, so as to determine whether to increase the output capacity of the refrigeration system or reduce the output capacity of the refrigeration system. It should be noted that the preset load here is consistent with the preset load in steps S202 and S203.

[0085] That is to say, if the air-conditioning system detects that the required refrigeration load has increased compared with the required refrigeration load detected last time, it means that the current refrigeration demand is increasing. At the same time, if the second difference ΔT2 is also increasing, it means that the gap between the current indoor temperature and the set temperature is widening, and the refrigeration effect is insufficient. Based on the above two conditions, the air-conditioning system can take measures to improve the output capacity of the refrigeration system, such as increasing the operating frequency of the compressor, turning on the pulsating heat pipe refrigeration mode or more refrigeration units, or adjusting the flow rate of the refrigerant, etc., to speed up the cooling speed and meet higher refrigeration needs; if the air-conditioning system detects that the required refrigeration load has decreased compared with the required refrigeration load detected last time, it means that the current refrigeration demand is decreasing. At the same time, if the second difference ΔT2 is also decreasing, it means that the current indoor temperature is approaching the set temperature and the refrigeration effect is good. Based on the above two conditions, the air-conditioning system can take measures to reduce the output capacity of the refrigeration system, such as reducing the operating frequency of the compressor, turning off the pulsating heat pipe refrigeration mode or some refrigeration units, or reducing the flow rate of the refrigerant, etc., to save energy and avoid excessive cooling.

[0086] Specifically, the step S402 includes step S501:

[0087] S501, if only the pulsating heat pipe cooling mode is currently turned on, the compressor cooling mode is turned on; if both the pulsating heat pipe cooling mode and the compressor cooling mode are currently turned on or only the compressor cooling mode is turned on, the compressor frequency is increased;

[0088] In this embodiment, if the pulsating heat pipe cooling mode and the compressor cooling mode are currently turned on at the same time or only the compressor cooling mode is turned on: it means that the current cooling demand is already high, but the cooling effect may be insufficient due to certain reasons (such as increased outdoor temperature, increased indoor heat source, etc.). At this time, the air-conditioning system will increase the operating frequency of the compressor to further improve the cooling capacity, and respond to higher cooling demands by increasing the cooling capacity to ensure that the indoor temperature can be quickly and stably reduced to the set temperature.

[0089] Specifically, the step S403 includes step S601:

[0090] S601. If only the pulsating heat pipe cooling mode is currently turned on, the pulsating heat pipe cooling mode is kept unchanged, and when the indoor temperature reaches the set temperature, the fan speed of the air conditioner indoor unit is reduced; if the pulsating heat pipe cooling mode and the compressor cooling mode are currently turned on at the same time or only the compressor cooling mode is turned on, the compressor frequency is reduced and continues to run, and when the indoor temperature is at the set temperature, the compressor cooling mode is turned off and the pulsating heat pipe cooling mode is turned on.

[0091] In this embodiment, if only the pulsating heat pipe cooling mode is currently turned on, the pulsating heat pipe cooling mode is kept unchanged first. If the indoor temperature reaches the set temperature after a period of time, but the air-conditioning system is still in the pulsating heat pipe cooling mode, then in order to save energy and reduce noise, the air-conditioning system will keep the pulsating heat pipe cooling mode unchanged and reduce the fan speed of the air-conditioning indoor unit. This can reduce energy consumption and noise while maintaining the indoor temperature.

[0092] If the pulsating heat pipe cooling mode and the compressor cooling mode are currently turned on at the same time, or only the compressor cooling mode is turned on, the system will first reduce the operating frequency of the compressor to reduce energy consumption. If it continues to run in this state for a period of time, the indoor temperature reaches the set temperature, the air-conditioning system will further turn off the compressor cooling mode and only keep the pulsating heat pipe cooling mode running. This can maximize energy savings while ensuring the cooling effect.

[0093] like Figure 7 The figure shows a logic diagram of the refrigeration system control method. The specific refrigeration system control method is as described above and will not be repeated here. It should be noted that the pulsating heat pipe refrigeration mode controls the logic action of the entire device through the main chip of the electric control box. The compressor, indoor fan and outdoor fan are all controlled by corresponding relays to control their output actions. The input part control is mainly completed through indoor temperature sensors, outdoor temperature sensors, remote control and other parts.

[0094] The pulsating heat pipe refrigeration mode and the compressor refrigeration mode can be started and operated independently or in conjunction with each other. Preferably, the pulsating heat pipe refrigeration works first to ensure the maximum possible energy saving. The compressor refrigeration mode is started only when it is detected that the pulsating heat pipe refrigeration mode cannot meet the indoor heat load. When it is detected that the heat pipe unit can meet the indoor heat load requirements, the controller will send a signal to stop the compressor.

[0095] It should be noted that those skilled in the art can clearly understand that the specific implementation process of the above-mentioned system and each unit can refer to the corresponding description in the aforementioned method embodiment, and for the convenience and brevity of description, it will not be repeated here.

[0096] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An air conditioner indoor unit, comprising an evaporator, characterized in that: It also includes a water receiving pan, a pulsating heat pipe and a condensed water latent cooling recovery and utilization device. The water receiving pan is used to collect condensed water generated by condensation of air through the evaporator. The condensed water latent cooling recovery and utilization device includes a water tank and a pumping component. One end of the pumping component is connected to the water receiving pan, and the other end is connected to the water tank. The pumping component is used to pump the condensed water collected in the water receiving pan into the water tank. The condensation end of the pulsating heat pipe is arranged in the water tank.

2. The air conditioner indoor unit according to claim 1, characterized in that: The condensed water latent cooling recovery and utilization device also includes: a liquid level detection component arranged in the water receiving tray, which is used to detect the condensed water level in the water receiving tray.

3. The air conditioner indoor unit according to claim 1, characterized in that: The condensed water latent cooling recovery and utilization device also includes: a water storage component, the water storage component has a water inlet and a water outlet, the other end of the pumping component is connected to the water inlet, the water outlet is connected to the water tank, and the height of the water storage component is higher than the height of the water tank.

4. The air conditioner indoor unit according to claim 1, characterized in that: The condensed water latent cooling recovery and utilization device also includes: a temperature sensor and a water level sensor, and the temperature sensor and the water level sensor are both arranged in the water tank and are used to detect the temperature and liquid level of the condensed water in the water tank respectively.

5. An air conditioner, comprising an air conditioner outdoor unit, wherein the air conditioner outdoor unit is provided with a compressor, characterized in that: It also includes an air conditioner indoor unit as described in any one of claims 1-4.

6. A refrigeration system control method, applied to the air conditioner as claimed in claim 5, characterized in that: include: When the air conditioner is in cooling operation, obtain the current indoor temperature and outdoor temperature; Calculating a first difference between the outdoor temperature and the indoor temperature, and a second difference between the indoor temperature and a set temperature; Comparing the relationship between the first difference, the second difference and a preset temperature value; According to the comparison result, the air conditioner is controlled to adopt a pulsating heat pipe cooling mode and / or a compressor cooling mode.

7. The refrigeration system control method according to claim 6, characterized in that: The preset temperature values ​​include a first preset temperature value x1, a second preset temperature value x2, a third preset temperature value y1, and a fourth preset temperature value y2; wherein x1 is smaller than x2, and y1 is smaller than y2; According to the comparison result, controlling the air conditioner to adopt the pulsating heat pipe cooling mode and / or the compressor cooling mode comprises: If the comparison result is that the first difference is less than or equal to x1 and the second difference is less than or equal to y1, the pulsating heat pipe cooling mode is started; If the comparison result is that the first difference is greater than x1 and less than x2 and the second difference is greater than y1 and less than y2, the required cooling load is obtained, and if the cooling load is less than or equal to the preset load, the pulsating heat pipe cooling mode is started; if the cooling load is greater than the preset load, the compressor cooling mode is started; If the comparison result is that the first difference is greater than or equal to x2 and the second difference is greater than or equal to y2, the required cooling load is obtained. If the cooling load is less than or equal to the preset load, the compressor cooling mode or the pulsating heat pipe cooling mode is started. If the cooling load is greater than the preset load, the pulsating heat pipe cooling mode and the compressor cooling mode are started at the same time.

8. The refrigeration system control method according to claim 7, characterized in that: If the cooling load is less than or equal to the preset load, the pulsating heat pipe cooling mode is started, including: After running for t1 time, the current indoor temperature is re-acquired and the second difference is updated. If the second difference is greater than or equal to y2, the compressor cooling mode is started. If the difference is less than y2, the pulsating heat pipe cooling mode is continued.

9. The refrigeration system control method according to claim 7, characterized in that: After the step of controlling the air conditioner to adopt the pulsating heat pipe cooling mode and / or the compressor cooling mode according to the comparison result, the method further comprises: After running for t2 time, the required cooling load is obtained, the current indoor temperature is re-obtained, and the second difference is updated; If the required refrigeration load increases and the second difference increases, the output capacity of the refrigeration system is increased; If the required refrigeration load decreases and the second difference decreases, the output capacity of the refrigeration system is reduced.

10. The refrigeration system control method according to claim 9, characterized in that: The improving the output capacity of the refrigeration system includes: if only the pulsating heat pipe refrigeration mode is currently turned on, then the compressor refrigeration mode is turned on; if both the pulsating heat pipe refrigeration mode and the compressor refrigeration mode are currently turned on or only the compressor refrigeration mode is turned on, then the compressor frequency is increased; The reducing the output capacity of the refrigeration system includes: if only the pulsating heat pipe refrigeration mode is currently turned on, the pulsating heat pipe refrigeration mode is kept unchanged, and when the indoor temperature reaches the set temperature, the fan speed of the air conditioner indoor unit is reduced; if the pulsating heat pipe refrigeration mode and the compressor refrigeration mode are currently turned on at the same time or only the compressor refrigeration mode is turned on, the compressor frequency is reduced and continues to run, and when the indoor temperature is at the set temperature, the compressor refrigeration mode is turned off and the pulsating heat pipe refrigeration mode is turned on.

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