Coupling type air conditioning system and operation method thereof

Abstract

According to the coupled air-conditioning system and the operation method thereof, one end of a heating radiator in the coupled air-conditioning system is communicated with a heating radiator water outlet pipeline, the other end of the heating radiator is communicated with a heating radiator water inlet pipeline, and a temperature-adjustable circulating water tank is communicated with one end of the water side of a water source region cooler through a water return pipe with a circulating water pump; the other end of the water side of the water source ground cooling machine is communicated with a third connector of the rear-mounted reversing three-way valve through a water outlet pipe, and a first connector and a second connector of the rear-mounted reversing three-way valve are connected between one end of the heating radiator and the heating radiator water outlet pipeline in series. The temperature-adjustable circulating water tank is communicated with a third connector of the front reversing three-way valve through a water supply pipe, a first connector and a second connector of the front reversing three-way valve are connected between the other end of the heating radiator and a heating radiator water inlet pipeline in series, and the water return pipe is communicated with a water drainage pipe through a second electric two-way valve. The method has the characteristics of easiness in operation and good energy-saving effect.

Description

Technical Field

[0001] The present invention relates to an air-conditioning system, and in particular to a coupled air-conditioning system and an operating method thereof. Background Art

[0002] Currently, many users in northern China use central heating, and these users have already installed central heating pipes to meet their winter heating needs. In northern China, summer temperatures and high humidity are rare, and the high temperatures don't last long, nor are the humidity low. Therefore, the need for summer cooling is less urgent.

[0003] However, with global temperatures continuing to rise over the years, extremely high temperatures in northern China are becoming commonplace in the summer, and the need for cooling and dehumidification has become increasingly prominent. Consequently, some of these users have purchased and installed separate air conditioning systems for cooling and dehumidification. This new system would undoubtedly require significant renovations to their homes, but for economic reasons, users prefer to minimize the expense and avoid major renovations. Therefore, improvements are needed. Summary of the Invention

[0004] The object of the present invention is to provide a coupled air conditioning system and an operating method thereof that are easy to operate and have good energy-saving effects, so as to overcome the deficiencies in the prior art.

[0005] A coupled air-conditioning system designed for this purpose is characterized in that one end of the radiator is connected to the radiator water outlet pipe, the other end of the radiator is connected to the radiator water inlet pipe, the temperature-adjustable circulating water tank is connected to one end of the water side of the water source ground cooling machine through a return pipe with a circulating water pump, the other end of the water side of the water source ground cooling machine is connected to the third interface of the rear reversible three-way valve through the outlet pipe, the first interface and the second interface of the rear reversible three-way valve are connected in series between one end of the radiator and the radiator water outlet pipe, the temperature-adjustable circulating water tank is connected to the third interface of the front reversible three-way valve through the water supply pipe, the first interface and the second interface of the front reversible three-way valve are connected in series to the The other end is between the radiator water inlet pipe, the return pipe is connected to the drain pipe through the second electric two-way valve, the adjustable temperature circulating water tank is connected to the first water pipe with a water supply pump, the return pipe is further provided with a first electric two-way valve, the first electric two-way valve is located between the second electric two-way valve and the adjustable temperature circulating water tank, the adjustable temperature circulating water tank is provided with a heating device, and the adjustable temperature circulating water tank is respectively provided with a first temperature sensor for detecting the water outlet temperature T1 of the water tank, a second temperature sensor for detecting the water inlet temperature T0 of the water tank, and a third temperature sensor for detecting the circulating water return temperature T2; the water source ground chiller includes a compressor, a condenser, an evaporator and a throttling component;

[0006] The first temperature sensor, the second temperature sensor, the third temperature sensor, the front reversible three-way valve, the rear reversible three-way valve, the first electric two-way valve, the second electric two-way valve, the water supply pump, the circulating water pump and the water source ground cooling machine are electrically connected to the central controller respectively.

[0007] Furthermore, a method for operating a coupled air conditioning system is characterized by comprising the following steps:

[0008] Step 1: Power on and go to step 2;

[0009] Step 2: The central controller determines whether the current cooling state is established. If it is established, it proceeds to step 3; otherwise, it proceeds to step 14.

[0010] Step 3: The central controller obtains the current T1 and proceeds to step 4;

[0011] Step 4: The central controller determines whether K≤T1≤L is established. If so, it proceeds to step 16; otherwise, it proceeds to step 5. The value range of K is 15°C to 18°C, the value range of L is 15°C to 26°C, and L>K.

[0012] Step 5: The central controller determines whether T1 < K. If so, it proceeds to step 12; otherwise, it proceeds to step 6.

[0013] Step 6: The central controller controls the water supply pump to start, and then proceeds to step 7;

[0014] Step 7: The central controller determines whether T0>L is established. If it is established, it proceeds to step 13; otherwise, it proceeds to step 8;

[0015] Step 8: The central controller controls the first electric two-way valve to close and the second electric two-way valve to open, and then proceeds to step 9;

[0016] Step 9: The central controller obtains the current T1 and proceeds to step 10;

[0017] Step 10: The central controller determines whether K≤T1≤L is established. If so, it proceeds to step 11; otherwise, it proceeds to step 8.

[0018] Step 11: The central controller controls the first electric two-way valve to open, and the second electric two-way valve and the water supply pump to close respectively, and then proceeds to step 16;

[0019] Step 12: The central controller controls the heating device on the temperature-adjustable circulating water tank to start, and then proceeds to step 3;

[0020] Step 13: The central controller controls the first electric two-way valve to close and the second electric two-way valve to open, and then proceeds to step 16;

[0021] Step 14: The central controller controls the front reversible three-way valve and the rear reversible three-way valve to be closed respectively, so as to cut off the communication between the water source ground cooling machine and the adjustable temperature circulating water tank and the radiator respectively, and then proceeds to step 15;

[0022] Step 15: The central controller controls the central heating to provide heating through the heater.

[0023] After adopting the above-mentioned technical solution, the present invention organically couples the radiator with the water source ground cooling machine through linkage control, thereby realizing centralized heating in winter and cooling and dehumidification in summer; without completely destroying the original centralized heating system, the water source ground cooling machine is coupled with the indoor radiator in the centralized heating system into a whole, and small-scale adjustments are made, thereby achieving easy operation, low transformation cost, and economic benefits, thereby meeting user needs to the greatest extent.

[0024] In winter, the central controller will close the front reversible three-way valve and the rear reversible three-way valve respectively, completely cutting off the connection between the water source ground cooling machine and the adjustable temperature water tank and the radiator. The water source ground cooling machine and the adjustable temperature water tank will not interfere with the original central heating system, and the original central heating system will still independently provide heating to the homeowner through the radiator; in summer, the central controller will open the front reversible three-way valve and the rear reversible three-way valve respectively, reversely cutting off the connection between the indoor radiator and the central heating pipe, so that the indoor radiator and the water collecting pipe, water pump, adjustable temperature water tank, water supply pipe, water source ground cooling machine, water outlet pipe, The return pipe and the drain pipe are connected to form a complete closed-loop system; the temperature-adjustable circulating water tank outputs cold water at about 20°C, which flows through the radiator, and the radiator can automatically output cold air to the room in the form of cold radiation; after the cold water flows out of the radiator, it flows into the water side of the water source ground cooler through the outlet pipe, and the water source ground cooler starts to cool and outputs cold air to the room; after the cold water flows out of the radiator, it enters the condenser of the water source ground cooler through the outlet pipe, dissipates heat for the condenser of the water source ground cooler, and then flows into the temperature-adjustable circulating water tank through the return pipe; in this way, a dual cooling mode of radiant cooling of the radiator and forced air cooling of the water source ground cooler is formed in summer.

[0025] The present invention does not interfere with the user's centralized heating in winter, and makes good use of idle radiators in summer, thereby perfectly tapping the potential value of radiators and enabling them to generate high-quality radiant cooling. Under normal circumstances, the cooling efficiency COP of a water source ground cooling machine is generally above 7. That is to say, to generate a cooling capacity of 2000W, the power consumption of the water source ground cooling machine is only about 250W, which is only slightly higher than the power consumption of a floor-standing fan. Moreover, the radiant cooling generated by the radiator can be said to be free. The water supply pump works intermittently, and the power consumption of the circulating water pump is very small. The water temperature of the water source is generally between 10 and 20 degrees Celsius, which can almost be directly supplied to the water source ground cooling machine for use. Therefore, it has obvious energy-saving characteristics.

[0026] In summary, the present invention has the characteristics of easy operation and good energy-saving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of an embodiment of the present invention.

[0028] Figure 2 It is an operation flow chart of the present invention.

[0029] In the figure: 1 is the radiator water outlet pipe, 2 is the radiator water inlet pipe, 3 is the water supply pump, 4 is the temperature-adjustable circulating water tank, 5 is the first electric two-way valve, 6 is the second electric two-way valve, 7 is the drain pipe, 8 is the return pipe, 9 is the water supply pipe, 10 is the front reversible three-way valve, 11 is the radiator, 12 is the rear reversible three-way valve, 13 is the water outlet pipe, 14 is the water source ground cooling machine, 15 is the circulating water pump, and 16 is the first water pipe. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] See also Figure 1 , a coupled air-conditioning system, one end of the radiator 11 is connected to the radiator water outlet pipe 1, the other end of the radiator 11 is connected to the radiator water inlet pipe 2, the adjustable temperature circulating water tank 4 is connected to one end of the water side of the water source ground cooling machine 14 through a return pipe 8 with a circulating water pump 15, the other end of the water side of the water source ground cooling machine 14 is connected to the third interface of the rear reversible three-way valve 12 through the outlet pipe 13, the first interface and the second interface of the rear reversible three-way valve 12 are connected in series between one end of the radiator 11 and the radiator water outlet pipe 1, the adjustable temperature circulating water tank 4 is connected to the third interface of the front reversible three-way valve 10 through the water supply pipe 9, the first interface and the second interface of the front reversible three-way valve 10 are connected in series to the radiator 1 1 is connected to the other end of the radiator water inlet pipe 2, the return pipe 8 is connected to the drain pipe 7 through the second electric two-way valve 6, the adjustable temperature circulating water tank 4 is connected to the first water pipe 16 with the water supply pump 3, and the return pipe 8 is further provided with a first electric two-way valve 5, the first electric two-way valve 5 is located between the second electric two-way valve 6 and the adjustable temperature circulating water tank 4, the adjustable temperature circulating water tank 4 is provided with a heating device, and the adjustable temperature circulating water tank 4 is respectively provided with a first temperature sensor for detecting the water tank outlet water temperature T1, a second temperature sensor for detecting the water tank inlet water temperature T0 and a third temperature sensor for detecting the circulating water return temperature T2; the water source ground chiller 14 includes a compressor, a condenser, an evaporator and a throttling component;

[0032] The first temperature sensor, the second temperature sensor, the third temperature sensor, the front reversible three-way valve 10, the rear reversible three-way valve 12, the first electric two-way valve 5, the second electric two-way valve 6, the water supply pump 3, the circulating water pump 15 and the water source ground cooling machine 14 are electrically connected to the central controller respectively.

[0033] In this embodiment, the adjustable temperature circulating water tank is provided with a heating device and is also provided with multiple temperature sensors for monitoring: the first temperature sensor is arranged at the junction of the adjustable temperature circulating water tank and the water supply pipe, close to the water supply port on the adjustable temperature circulating water tank; the second temperature sensor is arranged at the junction of the first water pipe and the adjustable temperature circulating water tank, close to the position where the first water pipe enters the water tank; the third temperature sensor is arranged at the junction of the return pipe and the adjustable temperature circulating water tank, close to the return water port on the adjustable temperature circulating water tank.

[0034] In this embodiment, the other end of the water side of the water source ground cooler is connected to the radiator water outlet pipe through the outlet pipe and the rear reversible three-way valve. One end of the water side of the water source ground cooler is connected to one end of the return pipe, and the other end of the return pipe is connected to the temperature-adjustable circulating water tank.

[0035] The water source ground cooling machine includes a compressor, a condenser, an evaporator and a throttling component. Among them, the condenser can be a plate heat exchanger, a high-efficiency tank heat exchanger or a shell and tube heat exchanger, etc. The water used by the water source ground cooling machine can be groundwater, pond water, tap water, etc. The water temperature of these water sources is generally between 10 and 20 degrees Celsius.

[0036] See also Figure 2 , a method for operating a coupled air conditioning system, comprising the following steps:

[0037] Step 1: Power on and go to step 2;

[0038] Step 2: The central controller determines whether the current cooling state is established. If it is established, it proceeds to step 3; otherwise, it proceeds to step 14.

[0039] Step 3: The central controller obtains the current T1 and proceeds to step 4;

[0040] In step 4, the central controller determines whether K≤T1≤L is established. If so, it proceeds to step 16, otherwise it proceeds to step 5; wherein, the value range of K is 15℃~18℃, the value range of L is 15℃~26℃, and L>K.

[0041] When the present invention provides cooling, it is necessary to first adjust the water in the temperature-adjustable circulating water tank to a suitable temperature, which is determined according to the actual use area and the specific water source. In this embodiment, in the northern region, K can be selected as 16°C and L can be selected as 22°C.

[0042] If the temperature is too high, the radiator may not radiate cold, but heat instead, which is not appropriate. If the temperature is too low, it may cause condensation on the surface of the radiator, which is also not good.

[0043] Step 5: The central controller determines whether T1 < K. If so, it proceeds to step 12; otherwise, it proceeds to step 6.

[0044] Step 6: The central controller controls the water supply pump 3 to start, and then proceeds to step 7;

[0045] Step 7: The central controller determines whether T0>L is established. If it is established, it proceeds to step 13; otherwise, it proceeds to step 8;

[0046] Step 8: The central controller controls the first electric two-way valve 5 to close and the second electric two-way valve 6 to open, and then proceeds to step 9;

[0047] Step 9: The central controller obtains the current T1 and proceeds to step 10;

[0048] Step 10: The central controller determines whether K≤T1≤L is established. If so, it proceeds to step 11; otherwise, it proceeds to step 8.

[0049] Step 11: The central controller controls the first electric two-way valve 5 to open, and the second electric two-way valve 6 and the water supply pump 3 to close respectively, and then proceeds to step 16;

[0050] Step 12: The central controller controls the heating device on the temperature-adjustable circulating water tank 4 to start, and then proceeds to step 3;

[0051] Step 13: The central controller controls the first electric two-way valve 5 to close and the second electric two-way valve 6 to open, and then proceeds to step 16;

[0052] In step 14, the central controller controls the front reversible three-way valve 10 and the rear reversible three-way valve 12 to be closed respectively, so as to cut off the communication between the water source ground cooling machine 14 and the adjustable temperature circulating water tank 4 and the radiator 11 respectively, and then proceeds to step 15;

[0053] Step 15: The central controller controls the central heating to provide heating through the heater.

[0054] During cooling in summer, the central controller controls the front reversible three-way valve and the rear reversible three-way valve to open, and then automatically controls the operating status of the coupled air-conditioning system according to the values of T0, T1, T2, K and L to output cooling capacity to the room.

[0055] The central controller first obtains and determines T1. When T1 is less than 16°C, the central controller controls the heating device of the adjustable temperature circulating water tank 4 to start and heat the water in the adjustable temperature circulating water tank until 16°C ≤ T1 ≤ 22°C is met. The central controller controls the heating device to stop heating. Next, the central controller controls the circulating water pump to start, and the adjustable temperature circulating water tank supplies water to the coupled air-conditioning system. Then, the water source ground chiller starts to work for cooling or dehumidification operations.

[0056] When T1>22℃, the central controller controls the water supply pump to start, automatically replenishing new water with a temperature of T0, and at the same time, draining some water in the adjustable temperature circulating water tank that is higher than 22℃. When the water temperature in the adjustable temperature circulating water tank meets 16℃≤T1≤22℃, the central controller controls the drain valve to close. At the same time, the central controller controls the water supply pump to shut down and stop replenishing the low-temperature water source. Next, the central controller controls the circulating water pump to start, and the adjustable temperature circulating water tank supplies water to the coupled air-conditioning system. Then, the water source ground chiller starts to work for cooling or dehumidification operations.

[0057] When the water temperature in the adjustable temperature circulating water tank meets 16℃≤T1≤22℃, the central controller controls the circulating water pump to start, first supplying water to the radiator and the water source ground cooler, and then the water source ground cooler starts to start cooling or dehumidification.

[0058] When T0>22℃, the temperature-adjustable circulating water tank does not process the water drawn into it, but directly outputs it for use by radiators and water source ground coolers. After use by the water source ground cooler, the water is directly discharged through the drain pipe and no longer returns to the temperature-adjustable circulating water tank.

[0059] Of course, for the case where T0>22℃, a cooling water system can be added. However, this requires adding equipment such as cooling towers, which will lead to a significant increase in costs.

[0060] In addition, the water level in the adjustable temperature circulating water tank must be maintained within a certain range. When it is insufficient, the water supply pump needs to be turned on to replenish it. When it is too much, it can automatically overflow from the overflow port of the adjustable temperature circulating water tank.

[0061] In summer, when the temperature in the user's room reaches the predetermined requirement, the water source cooler will be shut down, and the entire system can only start the circulating water pump to provide cooling through the cold radiation of the radiator, achieving a comfortable and extremely energy-saving state.

[0062] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0063] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A coupled air conditioning system, characterized in that One end of the radiator (11) is connected to the radiator water outlet pipe (1), and the other end of the radiator (11) is connected to the radiator water inlet pipe (2). The temperature-adjustable circulating water tank (4) is connected to one end of the water side of the water source ground cooling machine (14) through a return pipe (8) with a circulating water pump (15). The other end of the water side of the water source ground cooling machine (14) is connected to the third interface of the rear reversible three-way valve (12) through the outlet pipe (13). The first interface and the second interface of the rear reversible three-way valve (12) are connected in series between one end of the radiator (11) and the radiator water outlet pipe (1). The temperature-adjustable circulating water tank (4) is connected to the third interface of the front reversible three-way valve (10) through the water supply pipe (9). The first interface and the second interface of the front reversible three-way valve (10) are connected in series to the radiator (11). The other end of the water supply pipe (2) is connected to the radiator water inlet pipe (2), the return pipe (8) is connected to the drain pipe (7) through the second electric two-way valve (6), the adjustable temperature circulating water tank (4) is connected to the first water pipe (16) with the water supply pump (3), the return pipe (8) is further provided with a first electric two-way valve (5), the first electric two-way valve (5) is located between the second electric two-way valve (6) and the adjustable temperature circulating water tank (4), the adjustable temperature circulating water tank (4) is provided with a heating device, the adjustable temperature circulating water tank (4) is respectively provided with a first temperature sensor for detecting the water tank outlet water temperature T1, a second temperature sensor for detecting the water tank inlet water temperature T0 and a third temperature sensor for detecting the circulating water return temperature T2; the water source ground cooling machine (14) includes a compressor, a condenser, an evaporator and a throttling component; The first temperature sensor, the second temperature sensor, the third temperature sensor, the front reversible three-way valve (10), the rear reversible three-way valve (12), the first electric two-way valve (5), the second electric two-way valve (6), the water supply pump (3), the circulating water pump (15) and the water source ground cooling machine (14) are electrically connected to the central controller respectively.

2. A method for operating a coupled air conditioning system according to claim 1, characterized in that The following steps are involved: Step 1: Power on and go to step 2; Step 2: The central controller determines whether the current cooling state is established. If it is established, it proceeds to step 3; otherwise, it proceeds to step 14. Step 3: The central controller obtains the current T1 and proceeds to step 4; Step 4: The central controller determines whether K≤T1≤L is established. If so, it proceeds to step 16; otherwise, it proceeds to step 5. The value range of K is 15°C to 18°C, the value range of L is 15°C to 26°C, and L>K. Step 5: The central controller determines whether T1 < K. If so, it proceeds to step 12; otherwise, it proceeds to step 6. Step 6: The central controller controls the water supply pump (3) to start, and then proceeds to step 7; Step 7: The central controller determines whether T0>L is established. If it is established, it proceeds to step 13; otherwise, it proceeds to step 8; Step 8: The central controller controls the first electric two-way valve (5) to close and the second electric two-way valve (6) to open, and then enters step 9; Step 9: The central controller obtains the current T1 and proceeds to step 10; Step 10: The central controller determines whether K≤T1≤L is established. If so, it proceeds to step 11; otherwise, it proceeds to step 8. Step 11: The central controller controls the first electric two-way valve (5) to open, and the second electric two-way valve (6) and the water supply pump (3) to close respectively, and then enters step 16; Step 12: The central controller controls the heating device on the temperature-adjustable circulating water tank (4) to start, and then proceeds to step 3; In step 13, the central controller controls the first electric two-way valve (5) to close and the second electric two-way valve (6) to open, and then proceeds to step 16; In step 14, the central controller controls the front reversible three-way valve (10) and the rear reversible three-way valve (12) to be closed respectively, so as to cut off the communication between the water source ground cooling machine (14) and the temperature-adjustable circulating water tank (4) and the radiator (11), and then proceeds to step 15; Step 15: The central controller controls the central heating to provide heating through the heater.

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