Air conditioner indoor unit, air conditioning system, and control method therefor

Abstract

The present invention relates to the technical field of air conditioning, and specifically provides an air conditioner indoor unit, an air conditioning system, and a control method therefor, aiming to solve the problem that existing air conditioner indoor units, when used in hazardous locations, require an explosion-proof design for electrical components, leading to increased costs while safety hazards still exist. To this end, the air conditioner indoor unit of the present invention comprises an indoor heat exchanger and an indoor hydraulic fan for dissipating heat from the indoor heat exchanger. The indoor heat exchanger and the indoor hydraulic fan are separately disposed on a circulation water pipe. Water in the circulation water pipe exchanges heat with indoor air by means of the indoor heat exchanger and also provides operating power for the indoor hydraulic fan. The water flowing in circulation in the circulation water pipe serves as a heat exchange medium to exchange heat with the indoor air at the indoor heat exchanger, thus regulating the indoor temperature. Moreover, the circulating water also provides power for the indoor hydraulic fan, thus completely eliminating the safety hazards of explosions caused by electric sparks produced by electrical components, and providing a reliable temperature regulation solution for hazardous locations.

Description

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

[0001] The present application claims priority to Chinese Patent Application No. CN202510213571.1, filed on February 25, 2025, entitled "Air conditioner indoor unit, air conditioner system and control method thereof", the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of magnetic suspension measurement, and specifically provides a magnetic suspension balance and a control method thereof. BACKGROUND

[0003] At present, the heat exchanger and the indoor fan product of the heat pump air conditioner rely on electrical control. In this control system, the heat exchanger of the air conditioner is matched with the electronic expansion valve to adjust the heat exchange capacity of the heat exchanger, and the electric power is used as the power source of the indoor fan to drive the air flow, thereby realizing efficient exchange of heat on the surface of the heat exchanger.

[0004] However, electrical control inevitably involves strong electricity. During operation, the current and voltage of strong electricity are relatively high, and once electrical faults such as line short circuit and poor contact occur, electric sparks are easily generated. Because flammable and explosive gases, dust and other substances usually exist in explosion-proof places, even extremely small electric sparks can cause serious explosion accidents. Therefore, the existence of strong electricity greatly limits the use of the heat pump air conditioner in explosion-proof places.

[0005] In order to meet the strict requirements of explosion-proof places on equipment safety, according to the existing technical means, the electrical components on the air conditioner must be designed for explosion protection. However, such explosion-proof design has many drawbacks. On the one hand, from the cost point of view, explosion-proof design requires the use of special explosion-proof materials and complex processes, which will lead to a substantial increase in product cost. This not only increases the production cost of equipment manufacturers, but also makes the end users face higher economic burden in the process of procurement and use. On the other hand, from the safety point of view, even if the explosion-proof design is carried out, as long as the equipment is in the power-on state, it is impossible to fundamentally eliminate the possibility of sparking. Because the electrical equipment will be affected by various factors during long-term operation, such as equipment aging, environmental temperature change, mechanical vibration, etc., these factors may cause the explosion-proof performance to decrease, and then cause the sparking phenomenon, which undoubtedly makes the explosion-proof place always shrouded in the shadow of safety hazards. In addition, the complex explosion-proof design also increases the volume and weight of the equipment, making the installation and maintenance of the equipment more difficult, further reducing the convenience and reliability of the equipment in actual use.

[0006] Therefore, there is a need in the art for a new air conditioner indoor unit to solve the problem that the existing air conditioner indoor unit needs to be designed for explosion-proof when used in an explosion-proof place, resulting in increased cost and still having safety hazards. SUMMARY

[0007] The present application aims to solve the above technical problems, i.e., to solve the problem that the existing air conditioner indoor unit needs to be designed for explosion-proof when used in an explosion-proof environment, resulting in increased cost and still having safety hazards.

[0008] In a first aspect, the present application provides an air conditioner indoor unit, an air conditioner system comprising a circulating water pipe, the air conditioner indoor unit comprising an indoor heat exchanger and an indoor hydraulic fan for dissipating heat from the indoor heat exchanger;

[0009] The indoor heat exchanger and the indoor hydraulic fan are respectively arranged on the circulating water pipe, and the water in the circulating water pipe exchanges heat with indoor air through the indoor heat exchanger and also provides power for the indoor hydraulic fan.

[0010] In the above technical solution, the water circulating in the circulating water pipe serves as a heat exchange medium to exchange heat between the indoor heat exchanger and indoor air, thereby adjusting the indoor temperature. At the same time, the circulating water also provides power for the indoor hydraulic fan to realize physical driving of the fan rotation. This driving method is not only efficient and energy-saving, but also reduces the maintenance cost of the equipment. For indoor environments with explosion-proof requirements, the air conditioner indoor unit of the present application is particularly advantageous, as the indoor heat exchanger and the indoor hydraulic fan do not need to be equipped with electrical components, completely eliminating the safety hazards caused by electrical sparks that can cause explosions, providing a reliable temperature adjustment solution for explosion-proof places. In addition, the air conditioner indoor unit of the present application also does not need to be matched with complex control circuits and sensors, so the cost of the indoor unit is greatly reduced.

[0011] In a second aspect, the present application also provides an air conditioner system, the air conditioner system comprising a circulating water pipe, an air conditioner outdoor unit, and an air conditioner indoor unit; the air conditioner outdoor unit comprising a first outdoor heat exchanger;

[0012] The air conditioner indoor unit comprises an indoor heat exchanger and an indoor hydraulic fan for dissipating heat from the indoor heat excharger;

[0013] The indoor heat exchanger and the indoor hydraulic fan are respectively arranged on the circulating water pipe; the water in the circulating water pipe flows between the indoor heat exchanger and the first outdoor heat exchanger to exchange heat, and also provides power for the indoor hydraulic fan.

[0014] In the above technical solution, the first outdoor heat exchanger cools or heats the water in the water pipe to cool or heat the indoor environment.

[0015] In the optional technical solution of the air conditioning system, the circulating water pipe is provided with a water pump, and the water pump is located outdoors.

[0016] In the case of adopting the above technical solution, the water pump provides pressure for the water circulation flow.

[0017] In the optional technical solution of the air conditioning system, the outdoor unit comprises a compressor and a second outdoor heat exchanger, the compressor, the first outdoor heat exchanger and the second outdoor heat exchanger are all arranged on the refrigerant circulation pipeline, and the water in the circulating water pipe exchanges heat with the refrigerant through the first outdoor heat exchanger.

[0018] Alternatively, the first outdoor heat exchanger is arranged on the circulating water pipe, and the water in the circulating water pipe exchanges heat with outdoor air through the first outdoor heat exchanger.

[0019] In the case of adopting the above technical solution, the first outdoor heat exchanger realizes the temperature drop or rise of the water in the pipe through two schemes, one of which is to exchange heat between the compressor refrigerant and the water, and the other of which is to exchange heat between the outdoor air and the water through the first outdoor heat exchanger.

[0020] In a third aspect, the present application also provides a control method of an air conditioning system, the air conditioning system comprising a circulating water pipe, an outdoor unit and an indoor unit; the outdoor unit comprising a first outdoor heat exchanger;

[0021] The indoor unit comprises an indoor heat exchanger and an indoor hydraulic fan for dissipating heat of the indoor heat exchanger;

[0022] The indoor heat exchanger and the indoor hydraulic fan are respectively arranged on the circulating water pipe, the water in the circulating water pipe flows and exchanges heat between the indoor heat exchanger and the first outdoor heat exchanger, and also provides power for the indoor hydraulic fan; the circulating water pipe is provided with a water pump, and the water pump is located outdoors. The control method comprises:

[0023] The control method comprises:

[0024] Obtaining the inlet water temperature value and the outlet water temperature value of the circulating water pipe;

[0025] Calculating the difference ΔT1 between the inlet water temperature value and the outlet water temperature value;

[0026] Adjusting the rotating speed of the water pump according to ΔT1.

[0027] In the case of adopting the above technical solution, when ΔT1 exceeds the preset temperature range, the heat exchange capacity of the system needs to be adjusted by adjusting the rotating speed of the water pump.

[0028] In the optional technical solution of the control method of the air conditioning system, the control method further comprises:

[0029] obtaining an inlet water pressure value and an outlet water pressure value of the circulating water pipe;

[0030] calculating a difference value ΔP1 between the inlet water pressure value and the outlet water pressure value;

[0031] judging whether the water system is faulty according to the difference value ΔP1;

[0032] controlling the air conditioning system to stop when the water system is faulty.

[0033] In the above technical solution, the pressure difference is monitored to determine whether the water system is operating normally, so that the fault can be determined efficiently and accurately. Once a fault is detected, the air conditioning system is controlled to stop in time, thereby providing a strong guarantee for the safe and stable operation of the equipment.

[0034] In the optional technical solution of the control method of the air conditioning system, the step of "adjusting the water pump speed according to the difference value ΔT1" further comprises:

[0035] when the air conditioner is cooling, increasing the water pump speed when ΔT1< the first preset temperature value and decreasing the water pump speed when ΔT1> the second preset temperature value; and / or,

[0036] when the air conditioner is heating, decreasing the water pump speed when ΔT1< the first preset temperature value and increasing the water pump speed when ΔT1> the second preset temperature value.

[0037] In the above technical solution, when the air conditioner is cooling, ΔT1< the first preset temperature value indicates that the heat exchange capacity of the circulating water is insufficient, so the water pump speed should be increased to increase the water flow rate and thereby enhance the heat exchange capacity. ΔT1> the second preset temperature value means that the heat exchange capacity of the circulating water is excessive, so the water pump speed should be decreased to slow down the water flow rate and thereby reduce the heat exchange capacity. When the air conditioner is heating, ΔT1< the first preset temperature value means that the heat exchange capacity of the circulating water is excessive, so the water speed should be decreased to slow down the water flow rate and thereby reduce the heat exchange capacity. ΔT1> the second preset temperature value indicates that the heat exchange capacity of the circulating water is insufficient, so the water speed should be increased to increase the water flow rate and thereby enhance the heat exchange capacity.

[0038] In the optional technical solution of the control method of the air conditioning system, the step of adjusting the water pump speed according to the difference value ΔT1 further comprises:

[0039] when the second preset temperature value ≥ ΔT1 ≥ the first preset temperature value, maintaining the current water pump speed.

[0040] In the above technical solution, when ΔT1 is between the first preset temperature value and the second preset temperature value, it means that the heat exchange capacity of the current air conditioning system is moderate, so the water pump speed does not need to be adjusted.

[0041] In the optional technical solution of the control method of the air conditioning system, the step of judging whether the water system is faulty according to the ΔP1 further comprises:

[0042] When the ΔP1 is less than the first preset pressure value, it indicates that the water system is faulty;

[0043] When the ΔP1 is greater than the second preset pressure value, it indicates that the water system is faulty; wherein the first preset pressure value is greater than the second preset pressure value.

[0044] In the case of using the above technical solution, when the ΔP1 is less than the first preset pressure value, it means that the water system has a leakage fault. When the ΔP1 is greater than the second preset pressure value, it indicates that the water system is most likely to have a blockage fault.

[0045] In the optional technical solution of the control method of the air conditioning system, the step of judging whether the water system is faulty according to the ΔP1 further comprises:

[0046] When the second preset pressure value is greater than or equal to the ΔP1 and the ΔP1 is greater than or equal to the first preset pressure value, it indicates that the water system is running normally.

[0047] In the case of using the above technical solution, when the second preset pressure value is greater than or equal to the ΔP1 and the ΔP1 is greater than or equal to the first preset pressure value, it indicates that the water system is in a normal running state, the components work in coordination, the water pressure difference is in a reasonable range, and the system can stably realize heat exchange and other functions.

[0048] As can be understood by those skilled in the art, the air conditioner indoor unit of the present application comprises an indoor heat exchanger and an indoor hydraulic fan for dissipating heat for the indoor heat exchanger.

[0049] The indoor heat exchanger and the indoor hydraulic fan are respectively arranged on the circulating water pipe, and the water in the circulating water pipe exchanges heat between the indoor heat exchanger and the indoor air, and also provides power for the indoor hydraulic fan.

[0050] In the case of using the above technical solution, the water circulating in the circulating water pipe exchanges heat between the indoor heat exchanger and the indoor air as a heat exchange medium, thereby being able to adjust the indoor temperature. At the same time, the circulating water also provides power for the indoor hydraulic fan, realizing the physical driving of the fan rotation by water power. This driving mode not only is high in efficiency and energy saving, but also reduces the maintenance cost of the equipment. For indoor environments with explosion-proof requirements, the air conditioner indoor unit of the present application is particularly advantageous, since the indoor heat exchanger and the indoor hydraulic fan do not need to be equipped with electrical components, completely eliminating the safety hazard of explosion caused by electrical sparks, and providing a reliable temperature adjustment solution for explosion-proof places. In addition, the air conditioner indoor unit of the present application also does not need to be matched with a complex control circuit and sensors, so the cost of the indoor unit is greatly reduced, and it can be used in more severe environments. BRIEF DESCRIPTION OF DRAWINGS

[0051] The preferred embodiments of the present application will be described below in conjunction with the accompanying drawings. In the drawings:

[0052] Fig. 1 is a schematic diagram of an air conditioning system according to the present application;

[0053] Fig. 2 is a schematic diagram of the internal structure of an outdoor unit of the air conditioning system according to the present application;

[0054] Fig. 3 is a flow chart of a control method of the air conditioning system according to the present application;

[0055] Fig. 4 is a flow chart of another control method of the air conditioning system according to the present application.

[0056] List of Reference Signs:

[0057] 1, indoor unit; 11, indoor heat exchanger; 12, indoor hydraulic fan;

[0058] 2, circulating water pipe; 21, water inlet pipe; 22, water outlet pipe;

[0059] 3, outdoor unit; 31, compressor; 32, first outdoor heat exchanger; 33, second outdoor heat exchanger; 34, four-way valve;

[0060] 4, water pump;

[0061] 51, water inlet temperature sensor; 52, water inlet pressure sensor; 53, water outlet temperature sensor; 54, water outlet pressure sensor. DETAILED DESCRIPTION

[0062] The preferred embodiments of the present application will be described below in conjunction with the accompanying drawings. In the drawings:

[0063] In addition, it needs to be explained that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0064] To solve the problem that the existing air conditioner indoor unit needs to be designed for explosion-proof when used in explosion-proof place, resulting in cost increase and still having safety hazards, the present application provides an air conditioner indoor unit.

[0065] Referring to FIG. 1, the air conditioner indoor unit 1 of the present application comprises an indoor heat exchanger 11 and an indoor hydraulic fan 12 for dissipating heat for the indoor heat exchanger 11.

[0066] The indoor heat exchanger 11 and the indoor hydraulic fan 12 are respectively arranged on the circulating water pipe 2, and the water in the circulating water pipe 2 exchanges heat with indoor air through the indoor heat exchanger 11, and also provides power for the indoor hydraulic fan 12. The solid arrow in FIG. 1 indicates the flow direction of air after the indoor hydraulic fan 12 is turned on, and the single arrow indicates the flow direction of water.

[0067] The above setting mode has the advantages that: the water circulating in the circulating water pipe 2 acts as a heat exchange medium to exchange heat between the indoor heat exchanger 11 and indoor air, so as to adjust the indoor temperature. At the same time, the circulating water also provides power for the indoor hydraulic fan 12 to realize the water power physical driving of the fan rotation. This driving mode is not only efficient and energy-saving, but also reduces the maintenance cost of the equipment. For the indoor environment with explosion-proof requirements, the air conditioner indoor unit 1 of the present application is particularly advantageous, because the indoor heat exchanger 11 and the indoor hydraulic fan 12 do not need to be equipped with electrical components, and the safety hazard of explosion caused by electric spark of electrical components is completely eliminated, providing a reliable temperature adjustment solution for explosion-proof places. In addition, the air conditioner indoor unit 1 of the present application also does not need to be matched with a complex control circuit and sensor, so the cost of the indoor unit is greatly reduced.

[0068] Referring to FIG. 1, the present application further provides an air conditioning system, which comprises an air conditioner indoor unit 1, a circulating water pipe 2 and an air conditioner outdoor unit 3.

[0069] The air conditioner indoor unit 1 comprises an indoor heat exchanger 11 and an indoor hydraulic fan 12, and the indoor heat exchanger 11 and the indoor hydraulic fan 12 are arranged on the circulating water pipe 2.

[0070] Referring to FIG. 2, the air conditioner outdoor unit 3 includes a refrigerant circulation circuit and a compressor 31, a four-way valve 34, a first outdoor heat exchanger 32, and a second outdoor heat exchanger 33 provided on the refrigerant circulation circuit. The refrigerant circulates and flows between the second outdoor heat exchanger 33 and the first outdoor heat exchanger 32. The air conditioner outdoor unit 3 further includes an outdoor fan for accelerating heat dissipation of the second outdoor heat exchanger 33.

[0071] Specifically, the first outdoor heat exchanger 32 is provided with two heat exchange pipes, one of which is in communication with the refrigerant circulation pipeline, and the other of which is in communication with the circulating water pipe 2, so that the refrigerant and water can exchange heat efficiently in the first outdoor heat exchanger 32, realizing energy transfer between two different media and providing key support for the refrigeration and heating functions of the entire air conditioning system.

[0072] In terms of heat exchange efficiency, the efficient heat exchange between the refrigerant and the water in the first outdoor heat exchanger 32 greatly improves the refrigeration or heating speed of the system, which can quickly meet the temperature demand of the indoor environment.

[0073] Further, the indoor water power fan 12, as a key heat dissipation component of the indoor unit, is mainly composed of an impeller, a rotating shaft, a flow guide cover, a casing, and a water power driving device. The impeller is the core component of the water power fan to realize wind power output, which can efficiently convert the kinetic energy of water into its own rotational mechanical energy under the impact of water flow.

[0074] The rotating shaft penetrates the center of the impeller and is tightly connected with the impeller, responsible for transmitting the rotational power of the impeller. The rotating shaft is supported by high-precision bearings to ensure its stability and reliability during high-speed rotation, reduce friction and vibration, and reduce energy consumption and noise.

[0075] The flow guide cover is installed in front of the impeller, which guides the water flow to impact the impeller blades at the best angle and speed. The inner shape of the flow guide cover is streamlined, which can form a stable and orderly water flow before the circulating water enters the impeller, avoiding the disorder and energy dispersion of the water flow, and further improving the energy utilization efficiency of the water power fan.

[0076] The casing encapsulates the impeller, rotating shaft, flow guide cover, and other components, playing a protective and supporting role.

[0077] The water power driving device is the key part of the indoor water power fan 12 that distinguishes it from traditional electric fans. It is directly connected with the circulating water pipe 2, using the pressure difference generated by the circulating water flowing in the pipe as a power source. The water power driving device usually includes a specially designed water inlet and a flow distribution structure. The water inlet can efficiently collect the energy of the circulating water and guide the water flow to the impeller blades, and the flow distribution structure ensures that the water flow uniformly acts on each blade, so that the impeller can rotate smoothly and efficiently.

[0078] Optionally, the outdoor fan is an outdoor hydraulic fan, which is arranged on the circulating water pipe 2 and is also driven to rotate by water. The outdoor hydraulic fan has the same structure as the indoor hydraulic fan 12. Of course, the outdoor fan can also be an electric fan, which can be set by those skilled in the art according to actual needs and falls within the protection scope of the present application.

[0079] However, it should be noted that although the structure of the hydraulic fan is described in detail in the present application, it is not intended to limit the structure of the hydraulic fan, and those skilled in the art can set the type and structure of the hydraulic fan according to actual needs, and the structures of the indoor hydraulic fan 12 and the outdoor hydraulic fan can be the same or different and fall within the protection scope of the present application.

[0080] Further, the circulating water pipe 2 is provided with a pressurized water pump 4, which is used to drive the water in the circulating water pipe 2 to flow continuously. The water pump 4 is arranged in the outdoor area, which effectively avoids the adverse effects of the electrical components of the water pump 4 on indoor safety, especially in indoor environments with extremely high electrical safety requirements. The water pump 4 converts electrical energy into kinetic energy of water through mechanical power, ensuring that the water flows stably in the circulating water pipe 2 according to the predetermined path.

[0081] Of course, the water pump 4 can also be cancelled according to actual needs, and the principle of natural convection is used. When designing the water system, a certain height difference is formed between the indoor heat exchanger 11 and the first outdoor heat exchanger 32, and the difference in density of water at different temperatures is used to promote water circulation. When the water in the indoor heat exchanger 11 absorbs heat and the temperature rises, the density of the water decreases, and the hot water flows upward. The water in the first outdoor heat exchanger 32 releases heat and the temperature decreases, and the density of the water increases, so the cold water flows downward, thus forming a natural convection circulation, realizing the flow of water in the circulating water pipe 2. In addition, the thermosyphon principle can also be used, and heating and cooling areas are arranged at specific positions of the circulating water pipe 2, and pressure difference is generated by local temperature change to drive the circulation of water. However, compared with the water pump 4, these natural driving methods may have certain gaps in circulation efficiency and stability, which need to be considered in system design and actual application.

[0082] Furthermore, an inlet water temperature sensor 51 and an inlet water pressure sensor 52 are also installed on the circulating water pipe 2. The inlet water temperature sensor 51 and the inlet water pressure sensor 52 are located on the inlet water pipe 21, which is the pipe through which water enters from the first outdoor heat exchanger 32 to the indoor heat exchanger 11. An outlet water temperature sensor 53 and an outlet water pressure sensor 54 are installed on the outlet water pipe 22, which is the pipe through which water returns from the indoor heat exchanger 11 to the first outdoor heat exchanger 32. A controller is installed inside the outdoor unit 3 of the air conditioner. The controller is configured to acquire the values ​​detected by the sensors and control the operating status of the air conditioning system. For example, the start / stop and speed of the water pump 4, the start / stop and frequency of the compressor 31, etc. During use, the user can control the operation of the air conditioning system by setting the temperature.

[0083] The air conditioning system operates as follows: In cooling mode, water pump 4 and compressor 31 are activated. Compressor 31 compresses the refrigerant into a high-temperature, high-pressure gaseous refrigerant. After condensing and releasing heat in the second outdoor heat exchanger 33, the refrigerant enters the first outdoor heat exchanger 32 to absorb heat from the water. The cooled water then flows through pipes into the indoor heat exchanger 11. Here, the water exchanges heat with the hot indoor air, absorbing heat and thus cooling the room. After absorbing heat, the water temperature rises. This heated water then returns to the first outdoor heat exchanger 32 through pipes to release heat, which is then cooled again. This cycle repeats continuously, achieving the function of indoor cooling.

[0084] In heating mode, the high-temperature, high-pressure refrigerant from the compressor outlet releases heat in the first outdoor heat exchanger 32 and absorbs heat in the second outdoor heat exchanger 33. The refrigerant in the first outdoor heat exchanger 32 heats the water in the water pipes, and the heated water flows into the indoor heat exchanger 11. In the indoor heat exchanger 11, the hot water releases its heat into the indoor air, raising the indoor temperature. As heat is released, the water temperature gradually decreases, and the cooled water returns to the first outdoor heat exchanger 32 along the water pipes. The first outdoor heat exchanger 32 then reheats the water, and this cycle repeats continuously to provide heating to the room.

[0085] Of course, those skilled in the art can also remove the four-way valve 34 according to actual needs and achieve switching between pipelines in other ways. The present invention does not impose any restrictions on the modified pipelines based on this, and all of them fall within the protection scope of the present invention.

[0086] In another possible implementation, the outdoor unit of the air conditioner includes a first outdoor heat exchanger 32 and an outdoor hydraulic fan. The indoor heat exchanger 11, the indoor hydraulic fan 12, the first outdoor heat exchanger 32, and the outdoor hydraulic fan are all mounted on the circulating water pipe 2.

[0087] Both the indoor hydraulic fan 12 and the outdoor hydraulic fan are driven by water pressure to rotate. The indoor hydraulic fan 12 is used to dissipate heat for the indoor heat exchanger 11, and the outdoor hydraulic fan is used to dissipate heat for the first outdoor heat exchanger 32.

[0088] The indoor heat exchanger 11, indoor hydraulic fan 12, first outdoor heat exchanger 32, and outdoor hydraulic fan are all connected in series on the same circulating water pipe 2, forming a complete and efficient heat exchange circulation system. Heat exchange occurs between the indoor heat exchanger 11 and the first outdoor heat exchanger 32 through water within the circulating water pipe 2. Water continuously flows in this closed circulation system, carrying heat out of the room and releasing it to the outside, or introducing heat from the outside into the room, thereby achieving the function of cooling or heating.

[0089] In terms of energy utilization, both the indoor and outdoor water-powered fans are driven by water pressure, eliminating the need for additional electricity and significantly improving energy efficiency while reducing energy consumption. Secondly, the reduced use of electrical components not only lowers manufacturing costs but also enhances system reliability and stability. Regarding maintenance, the absence of a complex electrical system simplifies maintenance, significantly reducing costs. Furthermore, this air conditioning system is particularly advantageous in special locations with strict restrictions on electrical equipment use, such as explosion-proof and anti-static environments, fundamentally eliminating the risk of safety accidents caused by electrical faults. Simultaneously, water, as a heat exchange medium, has a high specific heat capacity, enabling more stable indoor temperature changes and providing a more comfortable indoor environment for users.

[0090] The air conditioning system operates as follows: In cooling mode, water pump 4 is activated, and the water in the first outdoor heat exchanger 32 exchanges heat with the outdoor air for cooling. The cooled water then enters the indoor heat exchanger 11, absorbing heat from the room to achieve the purpose of cooling the room. After absorbing heat, the water temperature rises, and this heated water returns to the first outdoor heat exchanger 32 through water pipes for further cooling. This cycle repeats continuously, achieving the function of indoor cooling.

[0091] In heating mode, the water in the first outdoor heat exchanger 32 exchanges heat with the outdoor air to raise its temperature. The heated water then flows into the indoor heat exchanger 11. At the indoor heat exchanger 11, the hot water releases its heat into the indoor air, raising the indoor temperature. As heat is released, the water temperature gradually decreases, and the cooled water returns to the first outdoor heat exchanger 32 along the circulation path. The first outdoor heat exchanger 32 then reheats the water, and this cycle repeats continuously to provide heating to the room.

[0092] As shown in Figure 3, the present invention also proposes a control method for an air conditioning system, the control method comprising the following steps:

[0093] Step S10: Obtain the inlet and outlet water temperatures of the circulating water pipe;

[0094] Step S11: Calculate the difference ΔT1 between the inlet water temperature and the outlet water temperature;

[0095] Step S12: Adjust the speed of water pump 4 according to △T1.

[0096] The inlet water temperature is the water temperature inside the inlet pipe 21, measured by the inlet water temperature sensor 51. The outlet water temperature is the water temperature inside the outlet pipe 22, measured by the outlet water temperature sensor 53.

[0097] Step S11 further includes:

[0098] Step: When the air conditioner is cooling, if the second preset temperature value ≥ △T1 ≥ the first preset temperature value, maintain the current speed of the water pump;

[0099] Step: When △T1 < the first preset temperature value, increase the water pump speed;

[0100] Step: When △T1 > the second preset temperature value, reduce the water pump speed;

[0101] Step: When the air conditioner is in heating mode, if the second preset temperature value ≥ △T1 ≥ the first preset temperature value, maintain the current speed of the water pump;

[0102] Step: When △T1 < the first preset temperature value, reduce the water pump speed;

[0103] Step: When △T1 > the second preset temperature value, increase the water pump speed.

[0104] When the temperature difference between the inlet and outlet water is △T1, which is the difference between the inlet water temperature and the outlet water temperature, and △T1 is between the first preset temperature value and the second preset temperature value, it means that the heat exchange capacity of the current air conditioning system is in a moderate state, and there is no need to adjust the water pump speed.

[0105] However, when ΔT1 exceeds the preset temperature range, the system's heat exchange capacity needs to be adjusted by regulating the water pump speed. During cooling, if ΔT1 < the first preset temperature value, it indicates insufficient heat exchange capacity of the circulating water. In this case, the water pump speed should be increased to accelerate the water flow rate, thereby enhancing the heat exchange capacity accordingly. If ΔT1 > the second preset temperature value, it means the circulating water's heat exchange capacity is too strong. To avoid unnecessary energy consumption, the water pump speed should be reduced to slow down the water flow rate, thus reducing the heat exchange capacity. During heating, if ΔT1 < the first preset temperature value, it indicates excessive heat exchange capacity of the circulating water. To avoid unnecessary energy consumption, the water pump speed should be reduced to slow down the water flow rate, thus reducing the heat exchange capacity. If ΔT1 > the second preset temperature value, it indicates insufficient heat exchange capacity of the circulating water. In this case, the water pump speed should be increased to accelerate the water flow rate, thereby enhancing the heat exchange capacity accordingly.

[0106] Taking a specific numerical range as an example, if the temperature difference between the inlet and outlet water, ΔT1, can be kept within the range of [-2℃, 2℃], it can ensure that the indoor temperature remains stable and reduce energy consumption.

[0107] During cooling, if ΔT1 is less than -2℃, it indicates that the circulating water's ability to remove heat is insufficient. In this case, increasing the speed of water pump 4 will make the water flow faster, allowing more heat to be removed by the circulating water and improving the heat exchange effect. If ΔT1 is greater than 2℃, it indicates that the circulating water is removing too much heat, resulting in energy waste. Reducing the water pump speed can reduce unnecessary energy consumption.

[0108] When heating, if ΔT1 is less than -2℃, it indicates that the circulating water is releasing too much heat; reducing the pump speed can reduce excessive heat release. If ΔT1 is greater than 2℃, it indicates that the circulating water is releasing insufficient heat; increasing the pump speed will allow more heat to dissipate into the room.

[0109] Of course, the first preset temperature value and the second preset temperature value can be set based on experimental data or experience. Those skilled in the art can set them according to actual needs. This invention does not impose any restrictions on the specific values ​​of the first preset temperature value and the second preset temperature value, and both fall within the protection scope of this invention.

[0110] Furthermore, abnormal operation of the water system can affect the system's heat exchange capacity. Therefore, to ensure reliable operation of the air conditioning system, as shown in Figure 4, the control method also includes:

[0111] Step S20: Obtain the inlet and outlet pressure values ​​of the circulating water pipe;

[0112] Step S21: Calculate the difference ΔP1 between the inlet pressure and the outlet pressure;

[0113] Step S22: Determine whether the water system is operating normally based on △P1;

[0114] Step S23: When the water system is not operating normally, control the air conditioning system to shut down.

[0115] The inlet water pressure value is the water pressure inside the inlet pipe 21, measured by the inlet water pressure sensor 52. The outlet water pressure value is the water pressure inside the outlet pipe 22, measured by the outlet water pressure sensor 54.

[0116] There are various reasons why a water system may malfunction, primarily including leaks, clogged heat exchangers, and pump failures. These malfunctions can cause abnormal fluctuations in the pressure difference between the inlet and outlet water, resulting in either excessively high or low pressure. Therefore, monitoring this pressure difference to determine if the water system is functioning correctly provides an efficient and accurate method for fault diagnosis. Once a fault is detected, the air conditioning system can be shut down promptly, ensuring the safe and stable operation of the equipment, reducing maintenance costs and inconvenience caused by malfunctions. Furthermore, it can prevent more serious equipment damage or disruptions to indoor comfort and safety caused by water system failures.

[0117] Specifically, step S22 further includes:

[0118] Step: When the second preset pressure value ≥ △P1 ≥ the first preset pressure value, it indicates that the water system is operating normally;

[0119] Step: When △P1 < the first preset pressure value, it indicates that the water system has a leakage fault;

[0120] Step: When △P1 > the second preset pressure value, it indicates that the water system has a blockage fault.

[0121] When the second preset pressure value ≥ △P1 ≥ the first preset pressure value, it indicates that the water system is in normal operation, all components work in coordination, the water pressure difference is within a reasonable range, and the system can stably achieve functions such as heat exchange.

[0122] When ΔP1 < the first preset pressure value, it means that the water system has a leakage fault. This is because under normal circumstances, the water pressure in the water system is maintained within a certain range. Once a leak occurs, the water flow in the pipe decreases, causing the difference between the inlet and outlet pressures to fall below the normal range.

[0123] When ΔP1 > the second preset pressure value, it indicates that the water system is very likely to have a blockage. For example, a dirty or clogged heat exchanger or foreign objects blocking the pipes will hinder the normal flow of water, causing the inlet water pressure to increase and the outlet water pressure to decrease, ultimately resulting in a pressure difference exceeding the normal upper limit.

[0124] As described in the first paragraph of this section, the above embodiments are merely used to illustrate the principles of the present invention and are not intended to limit the scope of protection of the present invention. Without departing from the principles of the present invention, those skilled in the art can adjust the above structure so that the present invention can be applied to more specific application scenarios.

[0125] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

An indoor unit for an air conditioner, characterized in that, The indoor unit (1) of the air conditioner includes an indoor heat exchanger (11) and an indoor hydraulic fan (12) for dissipating heat from the indoor heat exchanger (11); the air conditioning system includes a circulating water pipe (2); The indoor heat exchanger (11) and the indoor hydraulic fan (12) are respectively installed on the circulating water pipe (2). The water in the circulating water pipe (2) exchanges heat with the indoor air through the indoor heat exchanger (11) and also provides power to the indoor hydraulic fan (12). An air conditioning system, characterized in that, The air conditioning system includes an indoor unit (1), a circulating water pipe (2), and an outdoor unit (3); The indoor unit (1) of the air conditioner includes an indoor heat exchanger (11) and an indoor hydraulic fan (12) for dissipating heat from the indoor heat exchanger (11); The outdoor unit (3) of the air conditioner includes a first outdoor heat exchanger (32); The indoor heat exchanger (11) and the indoor hydraulic fan (12) are respectively installed on the circulating water pipe (2). The water in the circulating water pipe (2) flows and exchanges heat between the indoor heat exchanger (11) and the first outdoor heat exchanger (32), and also provides power for the indoor hydraulic fan (12). The air conditioning system according to claim 2 is characterized in that, A water pump (4) is installed on the circulating water pipe (2), and the water pump (4) is located outdoors. The air conditioning system according to claim 2 is characterized in that, The outdoor unit (3) of the air conditioner also includes a compressor (31) and a second outdoor heat exchanger (33). The compressor (31), the first outdoor heat exchanger (32) and the second outdoor heat exchanger (33) are all installed on the refrigerant circulation loop. The water in the circulating water pipe exchanges heat with the refrigerant through the first outdoor heat exchanger. Alternatively, the first outdoor heat exchanger (32) is installed on the circulating water pipe (2), and the water in the circulating water pipe (2) exchanges heat with the outdoor air through the first outdoor heat exchanger (32). A control method for an air conditioning system, characterized in that, The air conditioning system includes an indoor unit (1), a circulating water pipe (2), and an outdoor unit (3); The indoor unit (1) of the air conditioner includes an indoor heat exchanger (11) and an indoor hydraulic fan (12) for dissipating heat from the indoor heat exchanger (11); The outdoor unit (3) of the air conditioner includes a first outdoor heat exchanger (32); The indoor heat exchanger (11) and the indoor hydraulic fan (12) are respectively installed on the circulating water pipe (2). The water in the circulating water pipe (2) flows and exchanges heat between the indoor heat exchanger (11) and the first outdoor heat exchanger (32), and also provides power for the indoor hydraulic fan (12). A water pump (4) is installed on the circulating water pipe (2), and the water pump (4) is located outdoors. The control method includes: Obtain the inlet and outlet water temperatures of the circulating water pipe; Calculate the difference ΔT1 between the inlet water temperature and the outlet water temperature; Adjust the water pump speed according to △T1. The control method for an air conditioning system according to claim 5 is characterized in that, The control method further includes: Obtain the inlet and outlet pressure values ​​of the circulating water pipe; Calculate the difference ΔP1 between the inlet pressure and the outlet pressure. Determine whether the water system is faulty based on △P1; When the water system fails, the air conditioning system is shut down. The control method for an air conditioning system according to claim 5 is characterized in that, The step of "adjusting the water pump speed according to △T1" further includes: When the air conditioner is cooling, if ΔT1 < the first preset temperature value, the water pump speed is increased; if ΔT1 > the second preset temperature value, the water pump speed is decreased; if the first preset temperature value < the second preset temperature value; and / or, When the air conditioner is in heating mode, the water pump speed is reduced when △T1 < the first preset temperature value; the water pump speed is increased when △T1 > the second preset value; and the first preset temperature value < the second preset temperature value. The control method for an air conditioning system according to claim 7 is characterized in that, The step of "adjusting the water pump speed according to △T1" further includes: When the second preset temperature value is greater than or equal to △T1, the water pump maintains its current speed. The control method for an air conditioning system according to claim 6 is characterized in that, The steps for "determining whether the water system is faulty based on △P1" further include: When △P1 < the first preset pressure value, it indicates a water system malfunction; When △P1 > the second preset pressure value, it indicates a water system malfunction; where the first preset pressure value < the second preset pressure value. The control method for an air conditioning system according to claim 9 is characterized in that, The steps for "determining whether the water system is faulty based on △P1" further include: When the second preset pressure value ≥ △P1 ≥ the first preset pressure value, it indicates that the water system is operating normally.

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