A water pump air conditioner water quantity control system

Abstract

The utility model discloses a kind of water for heat pump air conditioner water quantity control system of cold carrier, including heating refrigeration device, water tank, water pump and at least two end heat exchangers;Heating refrigeration device includes air energy host and water heat exchanger;Water heat exchanger is located in water tank;The outlet end and inlet end of air energy host are connected with the inlet end and outlet end of water heat exchanger respectively;The water outlet end of water tank is connected with the inlet end of water pump by first pipeline;The outlet end of water pump is connected with the water outlet end of water tank by at least two second pipelines arranged in parallel;Correspondingly one end heat exchanger is respectively arranged on each second pipeline;One electric ball valve and one constant pressure check valve are respectively configured in the inlet end and outlet end of each end heat exchanger.The utility model can make the water pressure in each end heat exchanger consistent, finally ensure the accuracy of end heat exchanger refrigeration and heating temperature.

Description

Technical Field

[0001] This utility model relates to the field of heat pump air conditioning technology, specifically to a water volume control system for heat pump air conditioning when water is used as the refrigerant. Background Technology

[0002] As people's living standards continue to improve, heat pump air conditioning systems are commonly installed in homes, hotels, and other places to enhance environmental comfort. Therefore, with technological advancements, various types of heat pump air conditioning cooling and heating systems have emerged.

[0003] Application publication number CN109682009A discloses an automatic chilled water regulating device for air conditioning, specifically comprising: a main unit, a circulating pump, a first control valve, a water distributor, multiple fan coil units, multiple temperature sensors, a water collector, a variable displacement refrigeration compressor, multiple second control valves, and multiple water flow sensors; one end of the outlet pipe is connected to the outlet of the chilled water tank inside the main unit, and the other end of the outlet pipe is connected to the inlet of the circulating pump through the first control valve; the outlet of the circulating pump is connected to the inlet of the water distributor through a first pipe; the water distributor is provided with multiple outlets. Multiple water outlets are connected to the multiple water inlets of the water collector through a second pipe. Each second pipe is equipped with a fan coil unit, a second control valve, and a water flow sensor. Temperature sensors are installed on the fan coil units, which are located in the corresponding rooms. The water outlet of the water collector is connected to the water inlet of the chilled water tank inside the main unit. The main unit is equipped with a control system and a variable displacement refrigeration compressor. The circulating pump, the first control valve, multiple fan coil units, multiple temperature sensors, the variable displacement refrigeration compressor, multiple second control valves, and multiple water flow sensors are all connected to the control system.

[0004] However, there is still room for improvement in the aforementioned automatic chilled water regulating device for air conditioners. For example, while the installation position of the water distributor is generally fixed, the installation positions of each fan coil unit (i.e., indoor unit) are different, resulting in varying distances between the water distributor and each fan coil unit. This means the pipe lengths between each fan coil unit and the water distributor may differ, making the calculation of water flow in each pipe more complex. Consequently, the water distributor may not accurately control the water pressure entering each fan coil unit, and the water pressure exiting the fan coil units is also difficult to control accurately. Therefore, this design often leads to differences in water pressure within each fan coil unit, ultimately affecting the accuracy of the cooling and heating temperatures of the fan coil units. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a water flow control system for heat pump air conditioning when water is used as the refrigerant. By installing constant pressure check valves at the outlet of each terminal heat exchanger, the water pressure in each terminal heat exchanger is matched with the preset pressure of each constant pressure check valve. Moreover, this water pressure is not affected by the length of the pipeline, thus ensuring that the water pressure in each terminal heat exchanger is consistent and preventing inconsistent water pressure in each terminal heat exchanger. Ultimately, this guarantees the accuracy of the cooling and heating temperatures of the terminal heat exchangers.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A heat pump air conditioning water volume control system using water as the refrigerant includes a heating and cooling device, a water tank, a water pump, and at least two terminal heat exchangers. The heating and cooling device includes an air source heat pump and a water heat exchanger. The water heat exchanger is located inside the water tank. The outlet and inlet of the air source heat pump are respectively connected to the inlet and outlet of the water heat exchanger. The heating and cooling device can be used to heat or cool the water in the water tank. The outlet of the water tank is connected to the inlet of the water pump through a first pipe. The outlet of the water pump is connected to the outlet of the water tank through at least two parallel second pipes. Each of the second pipes corresponds to one terminal heat exchanger. Each terminal heat exchanger is equipped with an electric ball valve and a constant pressure check valve at its inlet and outlet. The terminal heat exchanger absorbs heat from the water for heating and releases heat to the water for cooling.

[0008] Furthermore, the electric ball valve is a proportional valve.

[0009] Furthermore, the water pump is a variable frequency water pump.

[0010] Furthermore, a pressure sensor for detecting pressure is also provided on the second pipeline; the pressure sensor can be used to monitor the pressure of the water entering each of the electric ball valves.

[0011] The beneficial effects of this utility model are as follows:

[0012] This invention eliminates the need for components such as water distributors in existing technologies, simplifying its overall structure. Furthermore, by installing constant-pressure check valves at the outlet of each terminal heat exchanger, and ensuring that the water pressure is not easily affected by pipe length, this invention matches the water pressure in each terminal heat exchanger with the preset pressure of each constant-pressure check valve. This guarantees consistent water pressure across all terminal heat exchangers, preventing inconsistencies and ultimately ensuring the accuracy of the cooling and heating temperatures of the terminal heat exchangers. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall principle framework of this utility model.

[0014] Figure Labels

[0015] 1. Water tank; 2. Water pump; 3. Terminal heat exchanger; 4. Air source heat pump unit; 5. Water heat exchanger; 6. Electric ball valve; 7. Constant pressure check valve; 8. First pipeline; 9. Second pipeline; 10. Pressure sensor. Detailed Implementation

[0016] The utility model will be further described below with reference to the accompanying drawings and specific embodiments. The following description is merely exemplary and does not limit the scope of protection of the utility model.

[0017] like Figure 1 As shown, a heat pump air conditioning water volume control system using water as the refrigerant includes a heating and cooling device, a water tank 1, a water pump 2, and at least two terminal heat exchangers 3.

[0018] The heating and cooling device includes an air source heat pump 4 and a water heat exchanger 5. The water heat exchanger 5 is located inside the water tank 1. The outlet and inlet of the air source heat pump 4 are respectively connected to the inlet and outlet of the water heat exchanger 5. The heating and cooling device can be used to heat or cool the water in the water tank 1. The outlet of the water tank 1 is connected to the inlet of the water pump 2 through a first pipe 8. The outlet of the water pump 2 is connected to the outlet of the water tank 1 through at least two parallel second pipes 9. Each second pipe 9 has a corresponding terminal heat exchanger 3. Each terminal heat exchanger 3 has an electric ball valve 6 and a constant pressure check valve 7 at its inlet and outlet. Specifically, the terminal heat exchanger 3 absorbs heat from the water for heating and releases heat to the water for cooling.

[0019] In this embodiment, the electric ball valve 6 is a proportional valve to accurately control the flow rate of water entering the terminal heat exchanger 3.

[0020] In this embodiment, pump 2 is a variable frequency pump so that it can be well used for pumping water.

[0021] In this embodiment, a pressure sensor 10 for detecting pressure is also provided on the second pipe 9. This pressure sensor 10 can be used to monitor the pressure of the water entering each electric ball valve 6.

[0022] As for the air source heat pump unit 4, it belongs to existing technology and can be used for the entry and exit of refrigerant, therefore, its structure and principle will not be described in detail here.

[0023] In addition, both the terminal heat exchanger 3 and the water heat exchanger 5 include a heat transfer system, but since this system is also existing technology, its structure and principle will not be described in detail here.

[0024] The following describes the specific working principle of this utility model in order to help you understand it:

[0025] During operation, firstly, the air source heat pump unit 4 introduces refrigerant into the water heat exchanger 5. In the water heat exchanger 5, the refrigerant releases or absorbs heat, thereby heating or cooling the water in the water tank 1 accordingly. Next, after the water pump 2 starts, the water in the water tank 1 is pumped through the water pump 2 and then through the electric ball valve 6 to each terminal heat exchanger 3, so that heating and cooling are achieved accordingly through heat release or absorption. For example, the terminal heat exchanger 3 absorbs heat from the water for heating, and releases heat to the water for cooling. This terminal heat exchanger 3 is used as an indoor unit. Next, the water that has undergone heat exchange in the terminal heat exchanger 3 is discharged and then passes through a constant pressure check valve 7 with a preset pressure. This ensures that the water pressure in each terminal heat exchanger 3 matches the preset pressure of the corresponding constant pressure check valve 7. Of course, the preset pressure of each constant pressure check valve 7 is the same, so that the water pressure in each terminal heat exchanger 3 is the same, thus preventing the situation where the water flow cannot be accurately controlled due to the difference in water pressure in each terminal heat exchanger 3. Next, the water discharged from the constant pressure check valve 7 is input into the water tank 1 to achieve circulation.

[0026] In summary, by installing constant-pressure check valves 7 at the outlet of each terminal heat exchanger 3, this invention ensures that the water pressure within each terminal heat exchanger 3 matches the preset pressure of each constant-pressure check valve 7. This guarantees that the water pressure within each terminal heat exchanger 3 is consistent and not easily affected by the length of the pipeline, thus preventing inconsistent water pressure across the terminal heat exchangers 3 and ultimately ensuring the accuracy of the cooling and heating temperatures of the terminal heat exchangers 3. Furthermore, this invention eliminates the need for components such as water distributors found in existing technologies, resulting in a simpler overall structure.

[0027] This utility model is not limited to the above-described embodiments. If any modifications or variations to this utility model do not depart from the spirit and scope of this utility model, and if such modifications and variations fall within the scope of the claims and equivalent technologies of this utility model, then this utility model also intends to include such modifications and variations.

Claims

1. A water flow control system for a heat pump air conditioning system using water as the refrigerant, characterized in that: It includes a heating and cooling device, a water tank, a water pump, and at least two terminal heat exchangers; The heating and cooling device includes an air source heat pump and a water heat exchanger; the water heat exchanger is located inside the water tank; the outlet and inlet of the air source heat pump are respectively connected to the inlet and outlet of the water heat exchanger; the heating and cooling device can be used to heat or cool the water in the water tank. The outlet of the water tank is connected to the inlet of the water pump via a first pipe; The outlet of the water pump is connected to the outlet of the water tank through at least two parallel second pipes; each of the second pipes is equipped with a corresponding terminal heat exchanger; each terminal heat exchanger is equipped with an electric ball valve and a constant pressure check valve at its inlet and outlet ends. The terminal heat exchanger absorbs heat from the water for heating, and releases heat to the water for cooling.

2. The heat pump air conditioning water flow control system using water as the refrigerant according to claim 1, characterized in that: The electric ball valve is a proportional valve.

3. The heat pump air conditioning water flow control system according to claim 1, characterized in that: The water pump is a variable frequency water pump.

4. The heat pump air conditioning water flow control system according to claim 1, characterized in that: A pressure sensor for detecting pressure is also installed on the second pipeline; the pressure sensor can be used to monitor the pressure of the water entering each of the electric ball valves.

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