CN112128892B - Air conditioning system and control method thereof - Google Patents

Abstract

The invention belongs to the technical field of air conditioning, and in particular relates to an air conditioning system and a control method thereof. The invention aims to solve the problem that the existing water air conditioner cannot be automatically adjusted according to the actual situation and cannot reasonably utilize energy in the actual use of the existing water air conditioners in factories, production workshops, farms and other large bases requiring constant temperature. For this purpose, according to the air conditioning system and the control method thereof of the present invention, the water exchange line can be turned on before turning on the heating circulation line and when the condition that the water temperature of the water heater is lower than that of the water well is satisfied. Therefore, before the air-conditioning system is heated, the water with the original lower temperature in the air-conditioning system is replaced by the well water along the water exchange pipeline formed between the pumping pump, the supplementary water pipe, the return water pipe, the water heater, the indoor heat exchanger and the water well in turn. Replacement, thus realizing the full utilization of the thermal energy in the groundwater source, and saving the time and energy required for the heating of the air-conditioning system.

Description

Air conditioning system and control method thereof

technical field

The invention belongs to the technical field of air conditioning, and in particular relates to an air conditioning system and a control method thereof.

Background technique

The water temperature about 15 meters underground is usually kept at about 18 degrees, and the water temperature is relatively constant. In areas with sufficient water sources, water air conditioners (also known as water-cooled air conditioners) can be used to circulate through groundwater. In summer, water is pumped up by water pumps and passed through indoor fan coil units to achieve cooling purposes, and the return water flows back to the ground through pipes. In winter, this cycle can also be used to achieve heating purposes.

Chinese patent document (CN2441068U) discloses a circulating well water air conditioner. The circulating well water air conditioner includes a cabinet, a condenser and a fan. The condenser is a water-cooled condenser, and a water inlet pipe of the condenser is connected with a There are water valves on the water inlet pipe and the water outlet pipe of the water pump and the condenser and are respectively connected to the water inlet main pipe and the water outlet main pipe, and the water inlet main pipe and the water outlet main pipe are inserted into the well. A water heating device is connected to the water inlet pipe and the water outlet pipe of the condenser in parallel, and there are water valves at both ends of the water heating device.

However, in the actual use of the existing water air conditioners in large bases such as factories, production workshops, and farms that require constant temperature, there are problems that they cannot be automatically adjusted according to actual conditions and cannot reasonably utilize energy.

Accordingly, there is a need in the art for a new air conditioning system and a control method thereof to solve the above problems.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned problems in the prior art, that is, in order to solve the actual use of the existing water air conditioners in large bases that require constant temperature in factories, production workshops, farms, etc., there are problems that cannot be automatically adjusted according to actual conditions and cannot be reasonably utilized For the problem of energy, the present invention provides an air conditioning system and a control method thereof.

First of all, the air conditioning system provided by the present invention includes an indoor heat exchanger, a water heater, and a pumping pump, and the pumping pump is used for pumping water in a water well; the air conditioning system is formed with a refrigeration cycle pipeline, a heating cycle pipeline, and a water pump. Water pipeline; on the refrigeration cycle pipeline, the water outlet of the suction pump is communicated with the water inlet of the indoor heat exchanger through the water inlet pipe, and the water outlet of the indoor heat exchanger discharges water to the water well through the water outlet pipe ; On the heating cycle pipeline, the water outlet of the water heater is communicated with the water inlet of the indoor heat exchanger through the water inlet pipe, and the water outlet of the indoor heat exchanger is connected to the water heater through the return pipe. The water inlet is connected; on the water exchange line, the water outlet of the suction pump is also connected to the end of the return pipe close to the indoor heat exchanger through a water supply pipe, and the water outlet of the water heater passes through the water inlet pipe. It is communicated with the water inlet of the indoor heat exchanger, and the water outlet of the indoor heat exchanger discharges water to the water well through the water outlet pipe; the controller of the air conditioning system is set to be able to adjust the indoor actual temperature and indoor preset temperature The comparison result selectively conducts the refrigeration cycle line or the heating cycle line; the controller of the air conditioning system is further configured to be able to meet the water temperature of the water heater before the heating cycle line is turned on When the condition is lower than the water temperature of the water well, the water exchange line is first turned on.

As a preferred technical solution of the above air-conditioning system provided by the present invention, the water inlet pipe is selectively connected to the water outlet of the suction pump and the water outlet of the water heater through the first three-way reversing valve; The water outlet of the indoor heat exchanger is selectively communicated with the water outlet pipe or the return water pipe through the second three-way reversing valve; the water outlet of the suction pump is connected with the first three-way reversing valve. A first on-off valve is arranged between them, and a second on-off valve is arranged on the water supply pipe.

As a preferred technical solution of the above air conditioning system provided by the present invention, the indoor fan configured in the indoor heat exchanger is set to adjust the rotation speed according to the difference between the indoor actual temperature and the indoor preset temperature.

As a preferred technical solution of the above air-conditioning system provided by the present invention, the circulating water pump of the air-conditioning system is provided on the water inlet pipe; and/or, the water inlet pipe is also provided with a filter and/or a regulating valve and/or, the water heater is any one of solar heating type, electric heating type and gas heating type.

As a preferred technical solution of the above air-conditioning system provided by the present invention, the first temperature detector of the air-conditioning system is configured to obtain the water temperature of the water well; the second temperature detector of the air-conditioning system is configured to obtain the temperature of the water heater. water temperature; the third temperature detector of the air conditioning system is configured to obtain the actual indoor temperature; the fourth temperature detector of the air conditioning system is configured to obtain the water temperature of the water outlet of the indoor heat exchanger.

Then, the present invention also provides a control method of an air-conditioning system, the air-conditioning system includes an indoor heat exchanger, a water heater, and a water pump; the air-conditioning system is formed with a refrigeration cycle pipeline, a heating cycle pipeline and a water exchange pipeline; On the refrigeration cycle pipeline, the suction pump is used to extract water in the well, and the water outlet of the suction pump is communicated with the water inlet of the indoor heat exchanger through a water inlet pipe, and the outlet of the indoor heat exchanger is connected to the water inlet of the indoor heat exchanger. The water outlet discharges water to the water well through the water outlet pipe; on the heating circulation pipeline, the water outlet of the water heater is communicated with the water inlet of the indoor heat exchanger through the water inlet pipe, and the outlet of the inner heat exchanger is connected with the water inlet of the indoor heat exchanger. The water outlet is communicated with the water inlet of the water heater through a water return pipe; on the water exchange line, the water outlet of the suction pump is also communicated with the end of the return pipe close to the indoor heat exchanger through a water replenishing pipe, and the The water outlet of the water heater is communicated with the water inlet of the indoor heat exchanger through the water inlet pipe, and the water outlet of the indoor heat exchanger discharges water to the water well through the water outlet pipe; the control method includes: acquiring the actual indoor temperature; comparing the indoor actual temperature with the indoor preset temperature, and selectively conducting the refrigeration cycle line or the heating cycle line according to the comparison result; before conducting the heating cycle line, The water temperature of the water heater and the water temperature of the water well are obtained respectively; when the water temperature of the water heater is lower than the water temperature of the water well, the water exchange line is firstly connected.

As a preferred technical solution of the above-mentioned control method for the air-conditioning system provided by the present invention, the step of "selectively conducting the refrigeration cycle line or the heating cycle line according to the comparison result" includes: when the When the actual indoor temperature is greater than the preset indoor temperature, the refrigeration cycle pipeline is connected; when the actual indoor temperature is lower than the preset indoor temperature, the heating cycle pipeline is connected.

As a preferred technical solution of the above-mentioned control method for the air-conditioning system provided by the present invention, at the same time as the step of "conducting the water exchange line", the control method further includes: when the water temperature of the water heater is lower than the water temperature of the water heater When the water temperature of the water well is adjusted, the heating function of the water heater is turned off; when the water temperature of the water heater is greater than or equal to the water temperature of the water well, the heating function of the water heater is activated.

As a preferred technical solution of the above-mentioned control method of the air-conditioning system provided by the present invention, after the step of "connecting the water exchange line", the control method further includes: obtaining the output of the indoor heat exchanger. The water temperature of the water outlet; when the water temperature of the water outlet of the indoor heat exchanger is greater than or equal to the water temperature of the water well, the heating circulation pipeline is turned on.

As a preferred technical solution of the above-mentioned control method of the air-conditioning system provided by the present invention, the control method further includes: when the refrigeration cycle line or the heating cycle line is turned on, according to the actual indoor temperature and The difference between the indoor preset temperatures adjusts the rotational speed of the suction pump and/or the circulating water pump and the rotational speed of the indoor fan configured in the indoor heat exchanger.

According to the air conditioning system and the control method thereof of the present invention, the water exchange line can be turned on before turning on the heating circulation line and when the condition that the water temperature of the water heater is lower than the water temperature of the water well is satisfied. Therefore, before the air-conditioning system is heated, the water with the original lower temperature in the air-conditioning system is replaced by the well water along the water exchange pipeline formed between the pumping pump, the supplementary water pipe, the return water pipe, the water heater, the indoor heat exchanger and the water well in turn. Replacement, thus realizing the full utilization of the thermal energy in the groundwater source, and saving the time and energy required for the heating of the air-conditioning system.

In addition, according to the air conditioning system and the control method thereof of the present invention, when the water temperature of the water heater is greater than or equal to the water temperature of the well, the heating function of the water heater is activated, and the water pumped by the water pump The water from the well is heated; with the discharge of the lower temperature water in the original air conditioning system, when the water temperature of the water outlet of the indoor heat exchanger is greater than or equal to the water temperature of the well, the heating circulation pipeline is turned on. In this way, while the water with lower temperature in the original air conditioning system is discharged, the well water pumped by the water pump can be heated in time, so as to improve the heating efficiency of the air conditioning system.

Description of drawings

The air conditioning system and the control method thereof of the present invention will be described below with reference to the accompanying drawings. In the attached picture:

1 is a schematic structural diagram of a refrigeration cycle pipeline of an air-conditioning system in this embodiment;

FIG. 2 is a schematic structural diagram of the heating circulation pipeline of the air-conditioning system in the present embodiment;

3 is a schematic structural diagram of the water exchange pipeline of the air-conditioning system in this embodiment;

FIG. 4 is a schematic flowchart of the control method of the air conditioning system in this embodiment.

List of reference signs

1-indoor heat exchanger; 2-water heater; 3-water pump;

41-water inlet pipe; 42-water outlet pipe; 43-water return pipe; 44-water supply pipe;

51-first three-way reversing valve; 52-second three-way reversing valve; 53-first on-off valve; 54-second on-off valve;

61-circulating water pump; 62-filter; 63-regulating valve;

71-first temperature detector; 72-second temperature detector; 73-third temperature detector; 74-fourth temperature detector;

81 - the first water well; 82 - the second water well.

Detailed ways

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection scope of the present invention. For example, although the water inlet pipe in the drawings is selectively communicated with the water outlet of the suction pump and the water outlet of the water heater through the first three-way reversing valve, the water outlet of the indoor heat exchanger is selected through the second three-way reversing valve. It can be connected to the outlet pipe or the return pipe in a natural way, but this arrangement is not static, and those skilled in the art can adjust it as needed to suit specific applications without departing from the principles of the present invention. The water inlet pipe can be connected to the water outlet of the water pump and the water outlet of the water heater through the two on-off valves respectively, and the water outlet of the indoor heat exchanger can also be selectively connected to the water outlet pipe or the water return pipe through the two on-off valves respectively. Pass.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The terminology of the indicated direction or positional relationship is based on the direction or positional relationship shown in the drawings, which is only for convenience of description and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation , so it cannot be construed as a limitation of the present invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In addition, it should also be noted that, in the description of the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a It is a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In order to solve the above-mentioned problems in the prior art, that is, in order to solve the actual use of the existing water air conditioners in large bases that require constant temperature in factories, production workshops, farms, etc., there are problems that cannot be automatically adjusted according to actual conditions and cannot be reasonably utilized For the problem of energy, this embodiment provides an air conditioning system and a control method thereof.

First of all, the air conditioning system provided in this embodiment includes an indoor heat exchanger 1, a water heater 2, and a pumping pump 3, and the pumping pump 3 is used for pumping water in a water well; the air conditioning system is formed with a refrigeration cycle pipeline, a heating cycle pipeline and a water exchange pipeline. pipeline.

As shown in Figure 1, on the refrigeration cycle pipeline, the water outlet of the suction pump 3 is communicated with the water inlet of the indoor heat exchanger 1 through the water inlet pipe 41, and the water outlet of the indoor heat exchanger 1 discharges the water to the water well through the water outlet pipe 42 .

As shown in FIG. 2 , on the heating cycle pipeline, the water outlet of the water heater 2 communicates with the water inlet of the indoor heat exchanger 1 through the water inlet pipe 41 , and the water outlet of the indoor heat exchanger 1 communicates with the water inlet of the water heater 2 through the return pipe 43 . The water outlet is connected.

As shown in FIG. 3 , on the water exchange pipeline, the water outlet of the suction pump 3 is also connected to the end of the return pipe 43 close to the indoor heat exchanger 1 through the water supply pipe 44 , and the water outlet of the water heater 2 exchanges heat with the indoor through the water inlet pipe 41 . The water inlet of the heat exchanger 1 is connected, and the water outlet of the indoor heat exchanger 1 discharges the water to the water well through the water outlet pipe 42 .

The controller of the air-conditioning system (not shown in the figure) is set to be able to selectively conduct the refrigeration cycle pipeline or the heating cycle pipeline according to the comparison result between the actual indoor temperature and the indoor preset temperature; the controller of the air-conditioning system is also set to The water exchange line can be turned on before turning on the heating circulation line and when the condition that the water temperature of the water heater 2 is lower than the water temperature of the water well is satisfied.

Exemplarily, the indoor heat exchanger 1 of this embodiment may be a fin-type heat exchanger, a plate-type heat exchanger, etc., and the indoor temperature can be adjusted by exchanging heat between the water inside and the indoor air. At the same time, the indoor heat exchanger 1 is generally also equipped with an indoor fan (not shown in the figure). When the difference between the actual indoor temperature and the indoor preset temperature is large, the heating or cooling efficiency of the air conditioning system can be improved by increasing the wind speed of the indoor fan.

The water heater 2 in this embodiment can be selected to be any one of a solar heating type, an electric heating type and a gas heating type. Of course, from the perspective of energy saving and environmental protection in this embodiment, the water heater 2 in the air conditioning system of this embodiment may be preferably a solar-heated water heater 2 .

In areas with sufficient water sources, groundwater flows continuously, generally by drilling a water well on the ground to face the groundwater layer, which can be understood as a hole that allows the pump 3 and the water pipe to be lowered. In order to prevent the drainage of the water outlet pipe 42 from affecting the water temperature of the water pumped by the suction pump 3, it is preferable to connect the suction pump 3 and the water outlet pipe 42 with different water wells separated by a certain distance, such as the first water well 81 shown in FIG. 1 to FIG. 3 . and the second well 82. Further, in order to make the heating or cooling effect of the air conditioning system better, the suction pump 3 can be arranged in the first water well 81 upstream of the water source, and the water outlet pipe 42 can be communicated with the second water well 82 downstream of the water source.

Although in FIG. 1 to FIG. 3 of this embodiment, the water inlet pipe 41 is selectively communicated with the water outlet of the suction pump 3 and the water outlet of the water heater 2 through the first three-way reversing valve 51, and the water outlet of the indoor heat exchanger 1 The water outlet is selectively connected to the water outlet pipe 42 or the water return pipe 43 through the second three-way reversing valve 52, but this setting method is not static. It needs to be adjusted to suit the specific application. The water inlet pipe 41 can be connected to the water outlet of the suction pump 3 and the water outlet of the water heater 2 through two on-off valves respectively, and the water outlet of the indoor heat exchanger 1 can also be selectively connected to the water outlet pipe through two on-off valves respectively. 42 or the return pipe 43 is turned on.

As shown in FIG. 1 , the refrigeration cycle pipeline of this embodiment is the water circulation route of the air-conditioning system during refrigeration. At this time, the first three-way reversing valve 51 conducts the water inlet pipe 41 line and the water outlet of the suction pump 3, and simultaneously The second three-way reversing valve 52 conducts between the water outlet of the indoor heat exchanger 1 and the water outlet pipe 42; that is, the water flow route is: the first water well 81 → the pump 3 → the water inlet pipe 41 → the indoor heat exchanger 1 → The water outlet pipe 42 → the second water well 82 .

As shown in FIG. 2 , the heating circulation pipeline of this embodiment is the water circulation route of the air-conditioning system during heating. At this time, the first three-way reversing valve 51 conducts the water inlet pipe 41 line with the water outlet of the water heater 2, and at the same time The second three-way reversing valve 52 conducts the water outlet of the indoor heat exchanger 1 with the return pipe 43; that is, the water flow route is: the water outlet of the water heater 2 → the water inlet pipe 41 → the indoor heat exchanger 1 → the water outlet pipe 42 → the return pipe Water pipe 43→water inlet of water heater 2.

As shown in FIG. 3 , the water exchange pipeline of this embodiment is the water flow route when all the original water flow in the air-conditioning system is replaced with water in well water. At this time, the first three-way reversing valve 51 connects the water inlet pipe 41 with the pumping water. The water outlet of the water pump 3 is connected, and the second three-way reversing valve 52 is connected to the water outlet of the indoor heat exchanger 1 and the water outlet pipe 42; that is, the water flow route is: water pump 3 → water supply pipe 44 → return water pipe 43→water inlet of water heater 2→water inlet pipe 41→indoor heat exchanger 1→water outlet pipe 42→second water well 82.

At the same time, in this embodiment, a first on-off valve 53 may also be provided between the water outlet of the suction pump 3 and the first three-way reversing valve 51 , and the first on-off valve 53 is used to control the relationship between the suction pump 3 and the first three-way reversing valve 51 . Conduction and cut-off between the three-way valves; a second on-off valve 54 can also be provided on the water supply pipe 44, and the second on-off valve 54 is used to control the water supply pipe 44 to conduct when the water exchange pipeline is turned on, When the water change line is cut off, it will be cut off. The first on-off valve 53 and the second on-off valve 54 can be selected as solenoid valves or electric valves.

It can be understood that, among the refrigeration cycle pipeline, the heating cycle pipeline and the refrigeration cycle pipeline in this embodiment, only one of them can be turned on at the same time, and the others are turned off.

It can be understood that the controller in the air conditioning system of this embodiment can determine whether the air conditioning system needs to be adjusted to the heating mode or the cooling mode according to the comparison result between the actual indoor temperature and the indoor preset temperature, and then controls the first temperature in the air conditioning system. Valves such as a three-way valve and a second three-way valve, as well as machines such as a water heater 2 and a water pump 3, are used to realize the conversion control of the heating mode and the cooling mode of the air conditioning system. Wherein, the actual indoor temperature can be acquired by the third temperature detector 73 of the air conditioning system as shown in FIGS. 1 to 3 , that is, the third temperature detector 73 of the air conditioning system is set to acquire the actual indoor temperature.

Further, the controller in the air conditioning system of the present embodiment can also conduct the water exchange line before conducting the heating circulation line and when the condition that the water temperature of the water heater 2 is lower than the water temperature of the water well is satisfied. The first temperature detector 71 of the air-conditioning system is configured to obtain the water temperature of the water well, and the first temperature detector 71 may be directly arranged in the first water well 81, or may be arranged on the water outlet of the suction pump 3; the first temperature detector 71 of the air-conditioning system The second temperature detector 72 is arranged to obtain the water temperature of the water heater 2 .

According to the air conditioning system of the present embodiment, the water exchange line can be turned on before turning on the heating circulation line and when the condition that the water temperature of the water heater 2 is lower than the water temperature of the water well is satisfied. Therefore, before the air-conditioning system is heated, the original water in the air-conditioning system is replaced by the well water along the water exchange pipeline formed between the water pump 3, the supplementary water pipe 44, the return water pipe 43, the water heater 2, the indoor heat exchanger 1 and the water well in sequence. The lower temperature water is replaced, so as to fully utilize the thermal energy in the groundwater source, and save the time and energy required for the heating of the air conditioning system.

As a preferred implementation of the above air-conditioning system provided in this embodiment, the circulating water pump 61 of the air-conditioning system is provided on the water inlet pipe 41; and/or, the water inlet pipe 41 is further provided with a filter 62 and/or a regulating valve 63 .

It can be understood that the circulating water pump 61 can be used to provide power or increase power for the flow of water in the corresponding pipelines when the refrigeration cycle pipeline, the heating cycle pipeline and the water exchange pipeline are connected. The filter 62 provided on the water inlet pipe 41 is used to filter the water flow before entering the indoor heat exchanger 1. In addition, another filter 62 can also be set between the suction pump 3 and the first three-way reversing valve 51. Filter the well water in the air-conditioning system to avoid problems such as blockage of pipelines in the air-conditioning system and damage to various machines.

The flow rate of water in the air conditioning system can be adjusted through the regulating valve 63 provided on the water inlet pipe 41 to achieve the purpose of adjusting the heating or cooling efficiency of the air conditioning system.

In addition, according to the air conditioning system of the present embodiment, while the water exchange line is turned on, when the water temperature of the water heater 2 is greater than or equal to the water temperature of the well, the heating function of the water heater 2 is activated, and the well water pumped by the suction pump 3 is activated. Carry out heating; with the discharge of the lower temperature water in the original air conditioning system, when the water temperature of the water outlet of the indoor heat exchanger 1 is greater than or equal to the water temperature of the water well, the heating circulation pipeline is turned on. In this way, the well water pumped by the suction pump 3 can be heated in time while the low temperature water in the original air-conditioning system is discharged, so as to improve the heating efficiency of the air-conditioning system. Wherein, the fourth temperature detector 74 of the air conditioning system is configured to acquire the water temperature of the water outlet of the indoor heat exchanger 1 .

Of course, the above-mentioned alternative embodiments, as well as between the alternative embodiments and the preferred embodiments, can also be used in cross-combination, so that new embodiments can be combined to be suitable for more specific application scenarios.

Then, the present embodiment also provides a control method for an air conditioning system. As shown in FIG. 1 to FIG. 3 , the air conditioning system includes an indoor heat exchanger 1, a water heater 2, and a water pump 3; Heating cycle pipeline and water exchange pipeline; on the refrigeration cycle pipeline, the suction pump 3 is used to extract the water in the well, and the water outlet of the suction pump 3 is connected with the water inlet of the indoor heat exchanger 1 through the water inlet pipe 41, and the indoor heat exchange The water outlet of the water heater 1 discharges the water to the water well through the water outlet pipe 42; on the heating cycle pipeline, the water outlet of the water heater 2 is communicated with the water inlet of the indoor heat exchanger 1 through the water inlet pipe 41, and the water outlet of the inner heat exchanger passes through The water return pipe 43 is communicated with the water inlet of the water heater 2; on the water exchange pipeline, the water outlet of the suction pump 3 is also communicated with the end of the water return pipe 43 close to the indoor heat exchanger 1 through the water supply pipe 44, and the water outlet of the water heater 2 is connected through the water inlet pipe 41 is communicated with the water inlet of the indoor heat exchanger 1, and the water outlet of the indoor heat exchanger 1 discharges water to the water well through the water outlet pipe 42; as shown in Figure 4, the control method includes:

S1. Obtain the actual indoor temperature;

S2. Compare the actual indoor temperature with the preset indoor temperature, and selectively conduct the refrigeration cycle pipeline or the heating cycle pipeline according to the comparison result;

S221, before conducting the heating circulation pipeline, obtain the water temperature of the water heater 2 and the water temperature of the water well;

S222, when the water temperature of the water heater 2 is lower than the water temperature of the water well, firstly connect the water exchange pipeline. It can be understood that, when the water temperature of the water heater 2 is greater than or equal to the water temperature of the water well, the heating circulation line can be directly connected.

According to the control method of the air conditioning system of the present embodiment, the water exchange line can be turned on before turning on the heating circulation line and when the condition that the water temperature of the water heater 2 is lower than the water temperature of the water well is satisfied. Therefore, before the air-conditioning system is heated, the original water in the air-conditioning system is replaced by the well water along the water exchange pipeline formed between the water pump 3, the supplementary water pipe 44, the return water pipe 43, the water heater 2, the indoor heat exchanger 1 and the water well in sequence. The lower temperature water is replaced, so as to fully utilize the thermal energy in the groundwater source, and save the time and energy required for the heating of the air conditioning system.

As a preferred implementation of the control method for the above-mentioned air-conditioning system provided in this embodiment, the step of “selectively conducting the refrigeration cycle pipeline or the heating cycle pipeline according to the comparison result” in the above step S2 includes:

S21, when the actual indoor temperature is greater than the indoor preset temperature, turn on the refrigeration cycle pipeline;

S22, when the actual indoor temperature is lower than the indoor preset temperature, turn on the heating circulation pipeline.

In this way, by comparing the actual indoor temperature with the preset indoor temperature, the automatic control of the cooling mode and the heating mode of the air-conditioning system is realized.

It can be understood that when the actual indoor temperature is equal to the preset indoor temperature, the air conditioning system does not need to perform cooling or heating, but the indoor fan can be turned on as required to promote indoor air circulation.

As a preferred implementation of the control method for the above-mentioned air-conditioning system provided in this embodiment, at the same time as the step of "conducting the water exchange line", the control method further includes:

S2231, when the water temperature of the water heater 2 is lower than the water temperature of the well, turn off the heating function of the water heater 2;

S2232 , when the water temperature of the water heater 2 is greater than or equal to the water temperature of the well, start the heating function of the water heater 2 .

It can be understood that when the well water from the first water well 81 replaces the water in the water heater 2 with the return pipe 43 in the original air conditioning system, the water temperature of the water heater 2 will theoretically be equal to the water temperature of the well, and the water heater is activated at this time. After the heating function of 2 is activated, the well water pumped into the air-conditioning system can be heated in the shortest time to ensure the subsequent heating efficiency of the air-conditioning system. Before the well water from the first water well 81 replaces the water in the water heater 2 and the return pipe 43 in the original air conditioning system, the heating function of the water heater 2 can be turned off for the electric heating type water heater 2 or the gas type water heater 2. to save energy. However, as for the solar water heater 2, since it does not consume energy, its opening and closing may not be specifically limited.

As a preferred implementation of the control method for the above air-conditioning system provided in this embodiment, after the step of "conducting the water exchange line", the control method further includes:

S224, obtaining the water temperature of the water outlet of the indoor heat exchanger 1;

S22, when the water temperature of the water outlet of the indoor heat exchanger 1 is greater than or equal to the water temperature of the water well, conduct the heating circulation pipeline.

It can be understood that when the water temperature of the water outlet of the indoor heat exchanger 1 is greater than or equal to the water temperature of the water well, it indicates that the well water in the first water well 81 has replaced all the water in the original air conditioning system. The water exchange pipeline is cut off, the heating circulation pipeline is turned on, and the pumping pump 3 is also stopped at the same time.

According to the control method of the air-conditioning system of the present invention, at the same time as the step of "conducting the water exchange line", when the water temperature of the water heater 2 is greater than or equal to the water temperature of the water well, the heating function of the water heater 2 is activated, and the water pumped by the suction pump 3 is turned on. When the water temperature of the water outlet of the indoor heat exchanger 1 is greater than or equal to the water temperature of the water well, the heating circulation pipeline is turned on. In this way, the well water pumped by the suction pump 3 can be heated in time while the low temperature water in the original air-conditioning system is discharged, so as to improve the heating efficiency of the air-conditioning system.

As a preferred implementation of the control method for the above-mentioned air conditioning system provided in this embodiment, the control method further includes: when the refrigeration cycle pipeline or the heating cycle pipeline is turned on, according to the difference between the indoor actual temperature and the indoor preset temperature The value adjusts the rotational speed of the suction pump 3 and/or the circulating water pump 61 and the rotational speed of the indoor fan provided in the indoor heat exchanger 1 .

Exemplarily, during cooling or heating, if the difference between the actual indoor temperature and the indoor preset temperature is large, the speed of the water pump 3 and the circulating water pump 61 can be increased to increase the flow rate of water in the air-conditioning system to improve cooling. or heating efficiency. At the same time, the efficiency of cooling or heating can also be improved by increasing the rotational speed of the indoor fan.

It should be noted that although the detailed steps of the method of the present invention are described in detail above, those skilled in the art can combine, split and exchange the order of the above steps without departing from the basic principle of the present invention, so that The modified technical solution does not change the basic idea of the present invention, and therefore also falls within the protection scope of the present invention.

For example, step S224 to obtain the water temperature of the water outlet of the indoor heat exchanger 1 and step S221 to obtain the water temperature of the water heater 2 and the water temperature of the well may be performed simultaneously, or step S221 may be performed first and then step S224 may be performed.

It should be understood by those skilled in the art that the control method of the air conditioning system provided in this embodiment may be stored in a computer-readable storage medium as a program. The storage medium includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute some steps of the methods of various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

Furthermore, it will be understood by those skilled in the art that although some of the embodiments described herein include certain features, but not others, included in other embodiments, that a combination of features of different embodiments is meant to be within the protection of the present invention range and form different embodiments. For example, in the claims of this invention, any of the claimed embodiments may be used in any combination.

So far, the technical solutions of the present invention have been described with reference to the preferred embodiments shown in the accompanying drawings, however, those skilled in the art can easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle 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 these changes or substitutions will fall within the protection scope of the present invention.

Claims (10)

1. An air-conditioning system, characterized in that the air-conditioning system comprises an indoor heat exchanger, a water heater and a pumping pump, and the pumping pump is used for pumping water in a water well; Thermal circulation lines and water exchange lines; On the refrigeration cycle pipeline, the water outlet of the suction pump is communicated with the water inlet of the indoor heat exchanger through a water inlet pipe, and the water outlet of the indoor heat exchanger discharges water to a water well through a water outlet pipe; On the heating cycle pipeline, the water outlet of the water heater communicates with the water inlet of the indoor heat exchanger through the water inlet pipe, and the water outlet of the indoor heat exchanger communicates with the water inlet of the water heater through a return pipe. water connection; On the water exchange line, the water outlet of the suction pump is also communicated with the end of the return pipe close to the indoor heat exchanger through a water supply pipe, and the water outlet of the water heater is connected to the indoor heat exchanger through the water inlet pipe. The water inlet of the heat exchanger is connected, and the water outlet of the indoor heat exchanger discharges the water to the water well through the water outlet pipe; The controller of the air-conditioning system is configured to selectively conduct the refrigeration cycle line or the heating cycle line according to the comparison result of the indoor actual temperature and the indoor preset temperature; The controller of the air conditioning system is further configured to conduct the water exchange line before conducting the heating circulation line and when the condition that the water temperature of the water heater is lower than the water temperature of the water well is satisfied. 2 . The air conditioning system according to claim 1 , wherein the water inlet pipe is selectively communicated with the water outlet of the suction pump and the water outlet of the water heater through a first three-way reversing valve; 3 . The water outlet of the indoor heat exchanger is selectively communicated with the water outlet pipe or the return water pipe through a second three-way reversing valve; A first on-off valve is arranged between the water outlet of the suction pump and the first three-way reversing valve, and a second on-off valve is arranged on the water supply pipe. 3 . The air conditioning system according to claim 1 , wherein the indoor fan configured in the indoor heat exchanger is set to adjust the rotation speed according to the difference between the indoor actual temperature and the indoor preset temperature. 4 . 4. The air-conditioning system according to claim 1, wherein the circulating water pump of the air-conditioning system is arranged on the water inlet pipe; and/or, The water inlet pipe is also provided with a filter and/or a regulating valve; and/or, The water heater is any one of solar heating type, electric heating type and gas heating type. 5. The air conditioning system according to claim 1, wherein, The first temperature detector of the air conditioning system is configured to obtain the water temperature of the water well; The second temperature detector of the air conditioning system is configured to obtain the water temperature of the water heater; The third temperature detector of the air conditioning system is configured to obtain the actual indoor temperature; The fourth temperature detector of the air conditioning system is configured to acquire the water temperature of the water outlet of the indoor heat exchanger. 6. A control method for an air-conditioning system, wherein the air-conditioning system comprises an indoor heat exchanger, a water heater, and a water pump; and a refrigeration cycle pipeline, a heating cycle pipeline and a water exchange pipeline are formed in the air-conditioning system; On the refrigeration cycle pipeline, the suction pump is used to extract water in the well, and the water outlet of the suction pump is communicated with the water inlet of the indoor heat exchanger through a water inlet pipe, and the outlet of the indoor heat exchanger is connected to the water inlet of the indoor heat exchanger. The water outlet discharges the water to the well through the outlet pipe; On the heating cycle pipeline, the water outlet of the water heater communicates with the water inlet of the indoor heat exchanger through the water inlet pipe, and the water outlet of the indoor heat exchanger communicates with the water inlet of the water heater through a return pipe. water connection; On the water exchange line, the water outlet of the suction pump is also communicated with the end of the return pipe close to the indoor heat exchanger through a water supply pipe, and the water outlet of the water heater is connected to the indoor heat exchanger through the water inlet pipe. The water inlet of the heat exchanger is connected, and the water outlet of the indoor heat exchanger discharges the water to the water well through the water outlet pipe; The control method includes: Get the actual indoor temperature; comparing the indoor actual temperature with the indoor preset temperature, and selectively conducting the refrigeration cycle pipeline or the heating cycle pipeline according to the comparison result; Obtain the water temperature of the water heater and the water temperature of the water well, respectively, before conducting the heating circulation line; When the water temperature of the water heater is lower than the water temperature of the water well, the water exchange line is first turned on. 7. The control method according to claim 6, wherein the step of "selectively conducting the refrigeration cycle line or the heating cycle line according to the comparison result" comprises: When the indoor actual temperature is greater than the indoor preset temperature, conducting the refrigeration cycle pipeline; When the actual indoor temperature is lower than the indoor preset temperature, the heating circulation pipeline is turned on. 8. The control method according to claim 6, characterized in that, while the step of "conducting the water exchange line", the control method further comprises: When the water temperature of the water heater is greater than or equal to the water temperature of the water well, the heating function of the water heater is activated. 9. The control method according to claim 8, wherein after the step of "conducting the water exchange line", the control method further comprises: obtaining the water temperature of the water outlet of the indoor heat exchanger; When the water temperature of the water outlet of the indoor heat exchanger is greater than or equal to the water temperature of the water well, the heating circulation line is turned on. 10. The control method according to claim 8, wherein the control method further comprises: When the refrigeration cycle line or the heating cycle line is turned on, the rotation speed of the suction pump and/or the circulating water pump set on the water inlet pipe is adjusted according to the difference between the indoor actual temperature and the indoor preset temperature. And the rotational speed of the indoor fan configured in the indoor heat exchanger is adjusted.

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