Water culture heat pump unit

Abstract

A water culture heat pump unit comprises a control device, a compressor, a four-way valve, a double-flow-channel heat exchanger, an electronic expansion valve, a fin type heat exchanger, a gas-liquid separator, a filtering sand cylinder, a first electric valve, a second electric valve, a third electric valve, a fourth electric valve and a water pump. The water inlet ends of the second electric valve and the fourth electric valve are connected in parallel and communicated with the water outlet end of the water pump, the water outlet ends of the second electric valve and the fourth electric valve are communicated with the water inlet connector pipe and the water outlet connector pipe respectively, the third electric valve and the water outlet connector pipe are communicated with a water channel of the double-flow-channel heat exchanger, one end of the first electric valve is communicated with the water inlet connector pipe, and the other end of the first electric valve is communicated with the blow-off pipe. When the second electric valve and the third electric valve are conducted, the working state is achieved; when the fourth electric valve and the first electric valve are switched on, a backwashing state is realized. And when the water flow flowing through the water channel of the water side heat exchanger is lower than the designed water flow, the compressor stops working, the filtering sand cylinder is backwashed, the water flow is automatically kept stable, and the compressor is protected.

Description

Technical Field

[0001] The utility model relates to a heat pump device, in particular to a heat pump unit used for aquaculture. Background Art

[0002] The current existing technology, Chinese invention patent application 201210060268.5, is a heat pump hot and cold water unit and its system in the field of energy technology, especially a heat pump hot and cold water unit and its system for cooling and heating seawater in marine aquaculture and other industrial and civilian uses. It includes a seawater preheating system, a seawater heat pump unit system and a marine aquaculture seawater system; the seawater preheating system contains: seawater, a seawater submersible pump, a filter and sand remover, a preheating heat exchanger, a filter, a wastewater submersible pump, and a wastewater pool; the seawater heat pump unit system contains: a PE coil, an antifreeze water tank, an antifreeze circulation pump, an antifreeze heat exchanger, a throttle valve, a compressor, a seawater heat exchanger, a ball valve 2 (20), a ball valve 3 (21), a ball valve 4 (22), and a ball valve 1 (23); the marine aquaculture seawater system contains: a seawater circulation pump, a breeding pool, a drain valve, a water supply valve, and a hot water storage tank. Problems exist: impurities in the filter cannot be removed, resulting in waterway blockage, reduced water flow, and the compressor is in a high compression ratio range for a long time. This reduces the energy efficiency ratio. Utility Model Content

[0003] The purpose of the utility model is to provide an aquaculture heat pump unit, which has the characteristics of backwashing of the filter sand tank, keeping the water channel unobstructed, and high energy efficiency ratio of the compressor.

[0004] The utility model is realized as follows: an aquaculture heat pump unit, which is special in that it includes a control device, a compressor, a four-way valve, a double-flow channel heat exchanger, an electronic expansion valve, a fin heat exchanger, a gas-liquid separator, a filter sand cylinder, a first electric valve, a second electric valve, a third electric valve, a fourth electric valve and a water pump.

[0005] The filter sand cylinder is installed at the water inlet pipe and the water outlet pipe.

[0006] The water inlet ends of the second and fourth electric valves are connected in parallel and communicate with the water outlet end of the water pump, and the water outlet ends are respectively connected with the water inlet interface pipe and the water outlet interface pipe. The third electric valve is connected with the water outlet interface pipe and the water channel of the dual-flow channel heat exchanger. One end of the first electric valve is connected with the water inlet interface pipe, and the other end is connected with the sewage pipe.

[0007] When the second electric valve and the third electric valve are connected, they are in the working state; when the fourth electric valve and the first electric valve are connected, they are in the backwashing state.

[0008] The aquaculture heat pump unit is special in that it also includes a water flow meter, which is arranged on the pipeline between the third electric valve and the water channel of the dual-flow channel heat exchanger.

[0009] The special feature of the aquaculture heat pump unit is that a return water temperature sensor and an outlet water temperature sensor are respectively provided at the water inlet and outlet ends of the water channel.

[0010] The utility model provides an aquaculture heat pump unit. When the water flow rate flowing through the water channel of the water-side heat exchanger is lower than the designed water flow rate, the compressor stops working and the filter sand cylinder is backwashed to automatically maintain the water flow rate stable and protect the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a view of the present utility model.

[0012] Figure 2 It is a partial enlarged view of the present utility model. DETAILED DESCRIPTION

[0013] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0014] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0015] like Figure 1 As shown, an aquaculture heat pump unit includes a control device (not shown), a compressor 1, a four-way valve 2, a dual-flow channel heat exchanger 3, an electronic expansion valve 4, a fin heat exchanger 5, a gas-liquid separator 6, a filter sand cylinder 7, a first electric valve 81, a second electric valve 82, a third electric valve 83, a fourth electric valve 84 and a water pump 9.

[0016] The filter sand cylinder 7 is provided at the water inlet interface pipe 71 and the water outlet interface pipe 72.

[0017] The water inlet ends of the second electric valve 82 and the fourth electric valve 84 are connected in parallel and communicate with the water outlet end of the water pump 9, and the water outlet ends are respectively connected to the water inlet interface pipe 71 and the water outlet interface pipe 72. The third electric valve 83 is connected to the water outlet interface pipe 72 and the water channel of the dual-flow channel heat exchanger 3. One end of the first electric valve 81 is connected to the water inlet interface pipe 71, and the other end is connected to the sewage pipe 811. The first electric valve 81, the second electric valve 82, the third electric valve 83, and the fourth electric valve 84 are connected to the water pump 9 and the control device.

[0018] When the second electric valve 82 and the third electric valve 83 are connected, they are in the working state; when the fourth electric valve 84 and the first electric valve 81 are connected, they are in the backwash state;

[0019] This design allows for backwashing, maintains water conductance, prevents the compressor from operating in a high compression ratio range for a long period of time, and improves energy efficiency.

[0020] As a further improvement of the present invention, a water flow meter 10 is further included. The water flow meter 10 is connected to the control device and is disposed on the pipeline between the third electric valve 83 and the water channel of the dual-flow channel heat exchanger 3. The water flow meter 10 provides water flow parameters to achieve automatic backwash control.

[0021] As a further improvement of the present invention: the water inlet and outlet ends of the water channel of the dual-flow channel heat exchanger 3 are respectively provided with a return water temperature sensor 31 and an outlet water temperature sensor 32; the return water temperature sensor 31 and the outlet water temperature sensor 32 are used to control the compressor and maintain the water temperature;

[0022] During normal operation, waste accumulates in the sand tank, causing a continuous decrease in water flow. This change in water flow continuously affects the heat pump unit's energy efficiency. Based on real-time changes in water flow and the temperature difference between the inlet and outlet water of the titanium tube heat exchanger, the unit calculates the titanium tube heat capacity (Q = CM△t) in real time. Based on the titanium tube heat capacity (Q), the variable frequency compressor displacement, and the target COP, the compressor frequency is adjusted in real time to maintain a high COP.

[0023] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An aquaculture heat pump unit, characterized by: It includes a control device, a compressor, a four-way valve, a dual-flow channel heat exchanger, an electronic expansion valve, a fin heat exchanger, a gas-liquid separator, a filter sand cylinder, a first electric valve, a second electric valve, a third electric valve, a fourth electric valve and a water pump. The filter sand cylinder is installed at the water inlet pipe and the water outlet pipe. The water inlet ends of the second and fourth electric valves are connected in parallel and communicate with the water outlet end of the water pump, and the water outlet ends are respectively connected with the water inlet interface pipe and the water outlet interface pipe. The third electric valve is connected with the water outlet interface pipe and the water channel of the dual-flow channel heat exchanger. One end of the first electric valve is connected with the water inlet interface pipe, and the other end is connected with the sewage pipe. When the second electric valve and the third electric valve are connected, they are in the working state; when the fourth electric valve and the first electric valve are connected, they are in the backwashing state.

2. The aquaculture heat pump unit according to claim 1, characterized in that: It also includes a water flow meter, which is arranged on the pipeline between the third electric valve and the water channel of the dual-flow channel heat exchanger.

3. An aquaculture heat pump unit according to claim 1 or 2, characterized in that: The water inlet end and the water outlet end of the water channel are respectively provided with a return water temperature sensor and an outlet water temperature sensor.

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