Air source heat pump system

Abstract

The utility model relates to an air source heat pump system, which belongs to the technical field of heat exchange, and comprises an air source heat pump host, a circulating pump, an expansion tank and a plurality of first fan coil units, the water inlet end of the circulating pump is connected to an external municipal tap water source, and the water outlet end of the circulating pump is connected to the water inlet end of the air source heat pump; the water outlet end of the air source heat pump is connected to the water inlet end of the first fan coil unit, the water outlet end of the first fan coil unit is connected to the water inlet end of the circulating pump, and the expansion tank is connected to a conveying pipeline between the water inlet end of the circulating pump and an external municipal tap water source. Advanced assemblies such as an evaporator, a liquid storage device, an economizer and a second fan coil are introduced, and the system achieves multi-stage utilization and efficient recovery of energy in the heat exchange process. And by using the economizer, the operation efficiency of the system under partial load is particularly enhanced, and unnecessary energy loss is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to heat exchange technical field, and specifically relates to an air source heat pump system. BACKGROUND

[0002] With the growth of global energy demand and the enhancement of environmental protection consciousness, efficient and energy-saving heating and hot water systems have become an important research direction in the field of construction. Traditional heating methods, such as coal-fired boilers and electric heating, have problems such as high energy consumption and serious pollution. Therefore, as a new type of clean energy utilization technology, the air source heat pump system gradually wins the favor of the market because it can efficiently extract heat from the air and convert it into indoor heating or hot water supply.

[0003] Although the air source heat pump system has shown significant advantages in improving energy utilization efficiency and reducing environmental pollution, the existing system still faces some challenges and problems in actual application. First, the stability and reliability of the circulating water system directly affect the operating efficiency and service life of the entire heat pump system. Traditional circulating water systems often use a single circulating pump design, which lacks precise control and adjustment of water flow, resulting in decreased system efficiency and increased energy consumption during partial load operation. UTILITY MODEL CONTENT

[0004] The utility model aims at the defects in the prior art, and provides an air source heat pump system to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] An air source heat pump system includes an air source heat pump main machine, a circulating pump, an expansion tank and a plurality of first fan coil units. The water inlet end of the circulating pump is connected to an external municipal tap water source. The water outlet end of the circulating pump is connected to the water inlet end of the air source heat pump. The water outlet end of the air source heat pump is connected to the water inlet end of the first fan coil unit. The water outlet end of the first fan coil unit is connected to the water inlet end of the circulating pump. The expansion tank is connected to the conveying pipeline between the water inlet end of the circulating pump and the external municipal tap water source.

[0007] The further improvement of the technical scheme further has that the air source heat pump host comprises an evaporator, a liquid accumulator, an economizer, a second fan coil, a four-way valve, a compressor and a condenser, the water inlet end of the evaporator is connected to the water outlet end of the circulating pump, the water outlet end of the evaporator is connected to the water inlet end of the first fan coil unit, the first water inlet and outlet end of the evaporator is connected to the first end of the liquid accumulator, the second end of the liquid accumulator is connected to the first end and the second end of the economizer, the third end of the economizer is connected to the first end of the four-way valve through the second fan coil, the second end of the four-way valve is connected to the first end of the condenser, the second end of the condenser is connected to the first end of the compressor, the second end of the compressor is connected to the fourth end of the economizer, the third end of the compressor is connected to the third end of the four-way valve, and the fourth end of the four-way valve is connected to the second water inlet and outlet end of the heat exchanger.

[0008] The further improvement of the technical scheme further has that the first throttling valve is arranged on the second fan coil, and the second throttling valve is arranged on the conveying pipeline between the second end of the liquid accumulator and the third end of the economizer.

[0009] The further improvement of the technical scheme further has that the first fan coil unit comprises at least one first fan coil, the water inlet end of the first fan coil is connected to the water outlet end of the air source heat pump host, and the water outlet end of the first fan coil is connected to the water inlet end of the circulating pump.

[0010] The further improvement of the technical scheme further has that the side of the first fan coil and the side of the second fan coil are both provided with a fan.

[0011] The further improvement of the technical scheme further has that the differential pressure bypass valve is further arranged, the first end of the differential pressure bypass valve is connected to the conveying pipeline between the water outlet end of the air source heat pump host and the water inlet end of the first fan coil unit, and the second end of the differential pressure bypass valve is connected to the conveying pipeline between the water outlet end of the first fan coil unit and the water inlet end of the circulating pump.

[0012] The further improvement of the technical scheme further has that the water softener is further arranged between the water inlet end of the circulating pump and the external municipal tap water source.

[0013] The further improvement of the technical scheme further has that the controller and the temperature sensor are further arranged, the temperature sensor is arranged on the conveying pipeline between the water outlet end of the circulating pump and the water inlet end of the air source heat pump host, and the temperature sensor is connected to the input end of the controller.

[0014] The beneficial effects of the utility model lie in:

[0015] Significant improvement of system energy efficiency: By introducing advanced components such as evaporators, reservoirs, economizers, and second fan coils, the system achieves multi-stage utilization and efficient recovery of energy during heat exchange. The use of economizers particularly enhances the system's operating efficiency at partial load, reducing unnecessary energy loss. In addition, the direct connection of the circulating pump to the evaporator and the series design of the evaporator and the first fan coil unit ensure efficient heat transfer, further improving the overall energy efficiency of the system.

[0016] Enhanced stability and reliability of the circulating water system: The system adopts a more complex layout of the circulating water system, effectively addressing the shortcomings of traditional single circulating pump designs by precisely controlling the flow direction and flow rate of the water flow. The installation of the expansion tank further stabilizes the system pressure, preventing instability caused by water flow fluctuations, thereby extending the service life of the heat pump system and reducing maintenance costs.

[0017] Optimized workflow of the heat pump main unit: Inside the air source heat pump main unit, the four-way valve is flexibly switched to achieve rapid conversion between cooling and heating modes. Meanwhile, the close cooperation between the compressor, condenser, evaporator, and economizer ensures efficient circulation and conversion of heat in the system. This optimized workflow not only improves the operating efficiency of the heat pump main unit but also enhances the adaptability and flexibility of the system.

[0018] Improved comfort of heating and hot water supply: Due to the use of multiple first fan coil units for heat distribution, the system ensures uniform distribution of indoor temperature. At the same time, through the auxiliary heating effect of the economizer and the second fan coil, the stability and comfort of heating or hot water supply can be guaranteed even in extreme weather conditions.

[0019] Reduced environmental pollution and energy consumption: As a new clean energy utilization technology, the system produces almost no pollutant emissions during the process of extracting heat from the air for heating or hot water supply. Compared with traditional coal-fired boilers, electric heating, and other methods, the system has significant advantages in reducing environmental pollution and energy consumption.

[0020] In addition, the design principle of the utility model is reliable, the structure is simple, and it has very wide application prospect.

[0021] Therefore, compared with the prior art, the utility model has outstanding substantial characteristics and significant progress, and the beneficial effects of its implementation are also obvious. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of the relationship of the air source heat pump system.

[0023] Figure 2 is a schematic diagram of the relationship of the air source heat pump main unit.

[0024] 110 is an air source heat pump main unit, 111 is an evaporator, 112 is a liquid accumulator, 113 is an economizer, 114 is a second fan coil, 115 is a four-way valve, 116 is a compressor, 117 is a condenser, 118 is a first thrott valve, 119 is a second thrott valve, 120 is a circulating pump, 130 is an expansion tank, 140 is a first fan coil unit, 150 is a differential pressure bypass valve, and 160 is a water softener. DETAILED DESCRIPTION

[0025] In order to make the personnel in the technical field better understand the technical solutions in the utility model, the technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor should belong to the protection scope of the utility model.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model are only for the purpose of describing the specific embodiments and are not intended to limit the utility model.

[0027] As shown in Figure 1 The utility model provides an air source heat pump system, including air source heat pump main unit 110, circulating pump 120, expansion tank 130 and a plurality of first fan coil unit 140, the water inlet of circulating pump 120 is connected to external municipal tap water source, the water outlet of circulating pump 120 is connected to the water inlet of air source heat pump, the water outlet of air source heat pump is connected to the water inlet of first fan coil unit 140, the water outlet of first fan coil unit 140 is connected to the water inlet of circulating pump 120, expansion tank 130 is connected to the conveying pipeline between the water inlet of circulating pump 120 and external municipal tap water source.

[0028] As shown in Figure 2As shown, the air source heat pump host 110 includes an evaporator 111, a liquid accumulator 112, an economizer 113, a second fan coil 114, a four-way valve 115, a compressor 116 and a condenser 117, the water inlet end of the evaporator 111 is connected to the water outlet end of the circulating pump 120, the water outlet end of the evaporator 111 is connected to the water inlet end of the first fan coil unit 140, the first water inlet and outlet end of the evaporator 111 is connected to the first end of the liquid accumulator 112, the second end of the liquid accumulator 112 is connected to the first end and the second end of the economizer 113, the third end of the economizer 113 is connected to the first end of the four-way valve 115 through the second fan coil 114, the second end of the four-way valve 115 is connected to the first end of the condenser 117, the second end of the condenser 117 is connected to the first end of the compressor 116, the second end of the compressor 116 is connected to the fourth end of the economizer 113, the third end of the compressor 116 is connected to the third end of the four-way valve 115, and the fourth end of the four-way valve 115 is connected to the second water inlet and outlet end of the heat exchanger.

[0029] Among them, the first throttling valve 118 is arranged on the second fan coil 114, and the second throttling valve 119 is arranged on the conveying pipeline between the second end of the liquid accumulator 112 and the third end of the economizer 113.

[0030] In addition, the first fan coil unit 140 includes at least one first fan coil, the water inlet end of the first fan coil is connected to the water outlet end of the air source heat pump host, and the water outlet end of the first fan coil is connected to the water inlet end of the circulating pump 120. The first fan coil is installed at the battery PACK. Correspondingly, one side of the first fan coil and one side of the second fan coil 114 are both configured with a fan.

[0031] In addition, the air source heat pump system further comprises a differential pressure bypass valve 150, the first end of the differential pressure bypass valve 150 being connected to the conveying pipeline between the air source heat pump main machine water outlet and the first fan coil unit 140 water inlet, and the second end of the differential pressure bypass valve 150 being connected to the conveying pipeline between the first fan coil unit 140 water outlet and the circulating pump 120 water inlet. When the load in the system decreases, especially when the required flow of the first fan coil unit 140 decreases, if the system pressure is not properly adjusted, it may cause the internal pressure of the air source heat pump main machine to be too high, thereby causing damage to the key components such as the compressor 116, the evaporator 111, and the condenser 117. At this time, the differential pressure bypass valve 150 will automatically open, allowing part of the water flow to bypass the first fan coil unit 140 and flow back to the circulating pump 120 water inlet directly, thereby reducing the pressure difference in the system and protecting the key components from damage. By adjusting the water flow in the system through the differential pressure bypass valve 150 to maintain or adjust the pressure difference inside the system, the system can maintain a relatively stable operating state under different load conditions. When the load is low, unnecessary energy consumption is reduced; when the load is high, sufficient flow and heat transfer can be ensured to meet the demand for heating or hot water supply. This adjustment mechanism helps to improve the overall stability and operating efficiency of the system.

[0032] In addition, the air source heat pump system further comprises a water softener 160, which is arranged between the circulating pump 120 water inlet and the external municipal water source.

[0033] Finally, the air source heat pump system further comprises a controller, a temperature sensor, and a power supply for the entire system, the temperature sensor being installed on the conveying pipeline between the circulating pump 120 water outlet and the air source heat pump main machine water inlet, and the temperature sensor being connected to the input end of the controller. The controller is used to control the overall operation of the system.

[0034] Specifically, in the heating condition: the circulating pump 120 is always on, the air source heat pump main machine starts when the air source heat pump main machine return water temperature is lower than 40℃ (pre-set), and the air source heat pump main machine stops when the air source heat pump main machine return water temperature is higher than 45℃ (pre-set). When the battery temperature is lower than the set temperature, the water circulation system is turned on, and when the battery temperature is higher than the set temperature, the water circulation system is turned off.

[0035] In the cooling condition: the circulating pump 120 is always on, the air source heat pump main machine starts when the air source heat pump main machine return water temperature is higher than 25℃ (pre-set), and the air source heat pump main machine stops when the air source heat pump main machine return water temperature is lower than 23℃ (pre-set). When the battery temperature is higher than the set temperature, the water circulation system is turned on, and when the battery temperature is lower than the set temperature, the water circulation system is turned off.

[0036] The above disclosed is only the preferred embodiment of the present application, but the present application is not limited to this, any non-creative change and some improvement and decoration made without departing from the principle of the present application can fall within the protection scope of the present application.

Claims

1. An air source heat pump system, characterized in that, It includes an air source heat pump main unit, a circulation pump, an expansion tank, and several first fan coil units. The inlet of the circulation pump is connected to an external municipal water source, the outlet of the circulation pump is connected to the inlet of the air source heat pump, the outlet of the air source heat pump is connected to the inlet of the first fan coil units, the outlet of the first fan coil units is connected to the inlet of the circulation pump, and the expansion tank is connected to the transmission pipeline between the inlet of the circulation pump and the external municipal water source.

2. The air source heat pump system according to claim 1, characterized in that, The air source heat pump unit includes an evaporator, a liquid receiver, an economizer, a second fan coil unit, a four-way valve, a compressor, and a condenser. The inlet of the evaporator is connected to the outlet of the circulating pump, and the outlet of the evaporator is connected to the inlet of the first fan coil unit. The first inlet and outlet of the evaporator are connected to the first end of the liquid receiver. The second end of the liquid receiver is connected to the first and second ends of the economizer. The third end of the economizer is connected to the first end of the four-way valve through the second fan coil unit. The second end of the four-way valve is connected to the first end of the condenser. The second end of the condenser is connected to the first end of the compressor. The second end of the compressor is connected to the fourth end of the economizer. The third end of the compressor is connected to the third end of the four-way valve. The fourth end of the four-way valve is connected to the second inlet and outlet of the heat exchanger.

3. The air source heat pump system according to claim 2, characterized in that, The second fan coil unit is equipped with a first throttle valve, and the delivery pipeline between the second end of the liquid receiver and the third end of the economizer is equipped with a second throttle valve.

4. The air source heat pump system according to claim 2, characterized in that, The first fan coil unit includes at least one first fan coil unit, the inlet of which is connected to the outlet of the air source heat pump unit, and the outlet of which is connected to the inlet of the circulating pump.

5. The air source heat pump system according to claim 4, characterized in that, Fans are installed on one side of the first fan coil unit and on one side of the second fan coil unit.

6. The air source heat pump system according to claim 1, characterized in that, It also includes a differential pressure bypass valve, the first end of which is connected to the conveying pipeline between the water outlet of the air source heat pump host and the water inlet of the first fan coil unit, and the second end of which is connected to the conveying pipeline between the water outlet of the first fan coil unit and the water inlet of the circulating pump.

7. The air source heat pump system according to claim 1, characterized in that, It also includes a water softener, which is installed between the inlet of the circulating pump and the external municipal water supply.

8. The air source heat pump system according to claim 1, characterized in that, It also includes a controller and a temperature sensor. The temperature sensor is installed on the delivery pipe between the outlet of the circulating pump and the inlet of the air source heat pump unit, and the temperature sensor is connected to the input of the controller.

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