Water source heat pump unit with subcooler

Abstract

The utility model discloses a water source heat pump unit with a subcooler, which comprises a water source heat pump unit body, the water source heat pump unit body is provided with a subcooler body, the front surface of the subcooler body is respectively provided with a discharge pipe and an inlet pipe, the end part of the inlet pipe is provided with an embedded filtering mechanism, and the end part of the inlet pipe is provided with a water inlet pipe. A butt joint pipe is arranged on the embedded filtering mechanism, the end of the butt joint pipe and the inlet pipe are fixed through a flange, an outer sleeve A is installed at the end, away from the inlet pipe, of the butt joint pipe, an outer sleeve B is installed on one side of the outer sleeve A, and a filtering cylinder mechanism is installed in the outer sleeve B and the outer sleeve A and provided with a lining pipe. And a filter screen is fixedly arranged in the lining pipe. According to the water source heat pump unit with the subcooler, the flow guide grooves formed by the curved surfaces can guide impurities to gather towards the bowl bottom, impurity accumulation on the surface of the filter screen is reduced, and fluid resistance is reduced; and the conditions of scaling of the inner wall of the cooler tube bundle, increase of thermal resistance, obstruction of fluid flow and reduction of heat exchange efficiency are avoided.

Description

Technical Field

[0001] This utility model relates to the field of water source heat pumps, specifically a water source heat pump unit with a subcooler. Background Technology

[0002] A water source heat pump unit is a highly efficient and energy-saving air conditioning device that uses water sources on the Earth's surface (such as groundwater, rivers, lakes, etc.) as a heat source and transfers heat by inputting a small amount of high-grade energy (such as electricity). Its working principle is based on the reverse Carnot cycle, which can be analyzed from two modes: cooling and heating. When the water source heat pump unit is in cooling mode, the system transfers the heat in the room to the water source to achieve a cooling effect.

[0003] Regarding the patent for a water source heat pump unit, Chinese patent publication number CN201757536U discloses a water source heat pump unit with a subcooler. The document includes a water-side heat exchanger, a throttling device, and an air-side heat exchanger. A subcooler is provided between the water-side heat exchanger and the throttling device. One end of the subcooler is connected to the water-side heat exchanger, and the other end of the subcooler is connected to the throttling device. The subcooler is located inside the air-side heat exchanger.

[0004] The aforementioned water source heat pump units with subcoolers have a large heat exchange capacity and high heat exchange efficiency, resulting in energy savings and improved efficiency. However, in actual use, the core function of the subcooler in a water source heat pump unit is to "subcool" the liquid refrigerant, thereby reducing its temperature and improving system energy efficiency, stability, and heating / cooling capacity. The liquid refrigerant (nearly saturated) after passing through the condenser enters the subcooler and is further cooled to a subcooled state (temperature below saturation temperature). For every 5°C increase in subcooling, the system COP can increase by approximately 2% to 3%. The refrigerant flowing into the subcooler is recycled refrigerant... In a heat pump system, the liquid refrigerant flowing out of the condenser is compressed into a high-temperature, high-pressure gas by the compressor and then enters the condenser to release heat to the outside (such as a water source) and condenses into a liquid state. The liquid refrigerant, after being subcooled, is discharged from the discharge pipe of the subcooler. When the liquid refrigerant circulates in the water source heat pump unit, metal shavings generated by compressor wear, welding slag residue from pipe welding, and high-temperature decomposition products of lubricating oil will enter the interior of the subcooler along with the liquid refrigerant, causing scaling on the inner wall of the subcooler tube bundle, increasing thermal resistance, hindering fluid flow, and reducing heat exchange efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a water source heat pump unit with a subcooler to solve the defects mentioned in the background art.

[0006] To achieve the above objectives, a water source heat pump unit with a subcooler is provided, comprising a water source heat pump unit body, on which a subcooler body is installed. A discharge pipe and an inlet pipe are respectively installed on the front side of the subcooler body. An embedded filter mechanism is installed at the end of the inlet pipe. A connecting pipe is provided on the embedded filter mechanism. The end of the connecting pipe is fixed to the inlet pipe via a flange. An outer sleeve A is installed at the end of the connecting pipe away from the inlet pipe. An outer sleeve B is installed on one side of the outer sleeve A. A filter cartridge mechanism is installed inside the outer sleeve B and the outer sleeve A. An inner liner tube is provided on the filter cartridge mechanism. A filter screen is fixedly installed inside the inner liner tube. A central flange is fixedly installed on the outer circumferential wall of the inner liner tube. A mass inlet pipe is provided at the end of the outer sleeve B.

[0007] Preferably, a first flange is fixedly provided at the end of the outer sleeve A, a second flange is fixedly provided at the end of the outer sleeve B, a central flange is provided between the second flange and the first flange, the second flange, the first flange and the central flange have the same diameter, and the second flange, the first flange and the central flange are fixed together by multiple sets of bolts.

[0008] Preferably, the outer tube A and the outer tube B have the same length and the same inner diameter. A sealing sleeve is fixedly provided on the outer circumferential wall of the inner liner tube. The inner liner tube is inserted into the inner tube A and the outer tube B and sealed by the sealing sleeve.

[0009] Preferably, a sealing gasket A is installed on one side of the center flange, and a sealing gasket B is installed on the other side of the center flange. The center flange and the second flange are sealed by the sealing gasket B, and the center flange and the first flange are sealed by the sealing gasket A.

[0010] Preferably, multiple sets of filter screens are evenly arranged on the inner circumference of the inner liner tube. The filter screens are bowl-shaped, and the concave direction of the filter screens is consistent with the direction of medium flow.

[0011] Preferably, the distance between two adjacent filter screens is consistent, the multiple filter screens are linearly distributed, and multiple filter holes are opened on each of the multiple filter screens. The diameter of the filter holes on the multiple filter screens decreases sequentially in an arithmetic sequence.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: the filter screen is bowl-shaped, the concave direction of the filter screen is consistent with the direction of medium flow, and the diameter of the filter holes on multiple sets of filter screens decreases in an arithmetic sequence. The bowl-shaped filter screen with the diameter of the filter holes on multiple sets of filter screens decreasing in sequence forms a stepped filtration barrier; large particles are first intercepted by the outer coarse filter screen, and small particles are captured by the inner fine filter screen, avoiding the clogging problem caused by concentrated load on a single precision filter screen, and improving the overall dirt holding capacity; the bowl-shaped curved surface design increases the effective filtration area of ​​a single filter screen compared to a flat filter screen, and the guide groove formed by the curved surface can guide impurities to accumulate at the bottom of the bowl, reducing the accumulation of impurities on the filter screen surface and reducing fluid resistance; it avoids the situation where scale forms on the inner wall of the cooler tube bundle, increasing thermal resistance, hindering fluid flow, and reducing heat exchange efficiency. Attached Figure Description

[0013] Figure 1 This is a front view schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the embedded filter mechanism of this utility model.

[0015] Figure 3 for Figure 2 Rear view;

[0016] Figure 4 This is a cross-sectional view of the filter cartridge mechanism of this utility model;

[0017] Figure 5 for Figure 4 Rear view.

[0018] The following are the labeling elements in the diagram: 1. Water source heat pump unit body; 2. Subcooler body; 3. Discharge pipe; 4. Inlet pipe; 5. Embedded filter mechanism; 50. Connecting pipe; 51. Outer sleeve A; 52. First flange; 53. Filter cartridge mechanism; 531. Inner liner pipe; 5311. Sealing sleeve; 532. Filter screen; 533. Center flange; 534. Sealing gasket A; 535. Sealing gasket B; 54. Second flange; 55. Outer sleeve B; 56. Inlet pipe. Detailed Implementation

[0019] Please see Figure 1-5This utility model provides a water source heat pump unit with a subcooler, including a water source heat pump unit body 1, a subcooler body 2 installed on the water source heat pump unit body 1, a discharge pipe 3 and an inlet pipe 4 respectively installed on the front of the subcooler body 2, an embedded filter mechanism 5 installed at the end of the inlet pipe 4, a connecting pipe 50 provided on the embedded filter mechanism 5, the end of the connecting pipe 50 being fixed to the inlet pipe 4 by a flange, an outer sleeve A51 installed at the end of the connecting pipe 50 away from the inlet pipe 4, an outer sleeve B55 installed on one side of the outer sleeve A51, a filter cartridge mechanism 53 installed inside the outer sleeve B55 and the outer sleeve A51, an inner liner tube 531 provided on the filter cartridge mechanism 53, a filter screen 532 fixedly installed inside the inner liner tube 531, a central flange 533 fixedly installed on the outer circumferential wall of the inner liner tube 531; a mass inlet pipe 56 is provided at the end of the outer sleeve B55.

[0020] Working principle: In a water source heat pump unit, the subcooler body 2 significantly improves the energy efficiency and stability of the system in both cooling and heating modes by deeply cooling the liquid refrigerant. Its core process revolves around the path of "condenser → subcooler → expansion valve → evaporator", and subcooling is controlled through heat exchange with the water source. By rationally designing the structure of the subcooler, the flow rate of the cooling medium, and the subcooling target, the water source heat pump can maintain high-efficiency operation under different climatic conditions, especially under extreme winter and summer conditions.

[0021] When the subcooler body 2 is in actual use, the liquid refrigerant passes through the embedded filter mechanism 5, and after being filtered, it enters the interior of the inlet pipe 4. The embedded filter mechanism 5 is equipped with a filter cartridge mechanism 53, which can filter the liquid refrigerant. Multiple sets of filter screens 532 are evenly arranged on the inner circumference of the inner liner tube 531. The filter screens 532 are bowl-shaped, and the concave direction of the filter screens 532 is consistent with the direction of medium flow. The diameter of the filter holes on the multiple sets of filter screens 532 is arithmetically equal. The bowl-shaped filter screens 532, with their progressively decreasing pore diameters, form a stepped filtration barrier. Large particles are first intercepted by the outer coarse filter screen 532, while tiny particles are captured by the inner fine filter screen 532. This avoids clogging problems caused by concentrated load on a single precision filter screen 532, thus increasing the overall dirt holding capacity. The bowl-shaped curved surface design increases the effective filtration area of ​​a single filter screen 532 compared to a flat filter screen 532, and the guide channels formed by the curved surface guide impurities to accumulate at the bottom of the bowl, reducing impurity buildup on the surface of the filter screen 532. The cup-shaped filter 532 reduces fluid resistance by guiding fluid to flow uniformly along the curved surface, reducing eddies and pressure surges caused by right-angle interception. Compared to the planar filter 532, pressure loss is reduced at the same flow rate, making it particularly suitable for subcooler systems sensitive to pressure drop, such as those requiring stable water pressure in refrigeration cycles. The bottom of the cup-shaped filter 532 serves as an impurity deposition area, preventing "bridging" on the filter surface. Impurity particles support each other and block the filter pores, making it easier to remove impurities through backwashing or disassembly, maintaining long-term filtration efficiency. The filter cartridge mechanism 53 can be completely disassembled and replaced. If filtration accuracy needs to be adjusted, only the filter cartridge with different filter 532 combinations needs to be replaced, without modifying the piping system, offering high flexibility. Through the curved interception and gradient filtration of the cup-shaped filter 532, multiple optimizations are achieved in terms of filtration efficiency, fluid performance, maintenance costs, and system compatibility. It is especially suitable for subcooler scenarios that are sensitive to water quality, have limited space, and require long-term stable operation, effectively reducing impurity blockage of heat exchange elements, improving system energy efficiency, and reducing operation and maintenance costs.

[0022] In a preferred embodiment, a first flange 52 is fixedly provided at the end of the outer sleeve A51, and a second flange 54 is fixedly provided at the end of the outer sleeve B55. A center flange 533 is provided between the second flange 54 and the first flange 52. The second flange 54, the first flange 52 and the center flange 533 have the same diameter, and the second flange 54, the first flange 52 and the center flange 533 are fixed together by multiple sets of bolts.

[0023] In a preferred embodiment, the outer tube A51 and the outer tube B55 have the same length and the same inner diameter. A sealing sleeve 5311 is fixedly provided on the outer circumferential wall of the inner liner tube 531. The inner liner tube 531 is inserted into the inner tube A51 and the outer tube B55 and sealed by the sealing sleeve 5311.

[0024] In a preferred embodiment, a sealing gasket A534 is installed on one side of the center flange 533, and a sealing gasket B535 is installed on the other side of the center flange 533. The center flange 533 and the second flange 54 are sealed by the sealing gasket B535, and the center flange 533 and the first flange 52 are sealed by the sealing gasket A534.

[0025] In a preferred embodiment, multiple sets of filter screens 532 are uniformly arranged on the inner circumferential wall of the inner liner tube 531. The filter screens 532 are bowl-shaped, and the concave direction of the filter screens 532 is consistent with the direction of medium flow.

[0026] In a preferred embodiment, the distance between two adjacent sets of filter screens 532 is consistent, the multiple sets of filter screens 532 are linearly distributed, and multiple sets of filter holes are opened on each set of filter screens 532. The diameter of the filter holes on the multiple sets of filter screens 532 decreases sequentially in an arithmetic sequence.

Claims

1. A water source heat pump unit with a subcooler, comprising a water source heat pump unit body (1), characterized in that: The water source heat pump unit body (1) is equipped with a subcooler body (2). The front of the subcooler body (2) is equipped with a discharge pipe (3) and an inlet pipe (4). An embedded filter mechanism (5) is installed at the end of the inlet pipe (4). A connecting pipe (50) is provided on the embedded filter mechanism (5). The end of the connecting pipe (50) is fixed to the inlet pipe (4) by a flange. An outer sleeve A (51) is installed at the end of the connecting pipe (50) away from the inlet pipe (4). An outer sleeve B (55) is installed on one side of the outer sleeve A (51). A filter cartridge mechanism (53) is installed inside the outer sleeve B (55) and the outer sleeve A (51). An inner liner pipe (531) is provided on the filter cartridge mechanism (53). A filter screen (532) is fixedly installed inside the inner liner pipe (531). A central flange (533) is fixedly installed on the outer circumferential wall of the inner liner pipe (531). A mass inlet pipe (56) is provided at the end of the outer sleeve B (55).

2. A water source heat pump unit with a subcooler according to claim 1, characterized in that: The outer sleeve A (51) is fixedly provided with a first flange (52) at its end, and the outer sleeve B (55) is fixedly provided with a second flange (54) at its end. A center flange (533) is provided between the second flange (54) and the first flange (52). The diameters of the second flange (54), the first flange (52) and the center flange (533) are the same. The second flange (54), the first flange (52) and the center flange (533) are fixed together by multiple sets of bolts.

3. A water source heat pump unit with a subcooler according to claim 1, characterized in that: The outer tube A (51) and outer tube B (55) have the same length and the inner diameter of the outer tube A (51) and outer tube B (55) are the same. A sealing sleeve (5311) is fixedly installed on the outer circumference of the inner liner tube (531). The inner liner tube (531) is inserted into the inside of the outer tube A (51) and outer tube B (55) and sealed by the sealing sleeve (5311).

4. A water source heat pump unit with a subcooler according to claim 1, characterized in that: A sealing gasket A (534) is installed on one side of the center flange (533), and a sealing gasket B (535) is installed on the other side of the center flange (533). The center flange (533) and the second flange (54) are sealed by the sealing gasket B (535), and the center flange (533) and the first flange (52) are sealed by the sealing gasket A (534).

5. A water source heat pump unit with a subcooler according to claim 1, characterized in that: Multiple sets of filter screens (532) are uniformly arranged on the inner circumference of the inner liner tube (531). The filter screens (532) are bowl-shaped, and the concave direction of the filter screens (532) is consistent with the direction of medium flow.

6. A water source heat pump unit with a subcooler according to claim 5, characterized in that: The distance between two adjacent filter screens (532) is consistent. The multiple filter screens (532) are linearly distributed. Multiple filter holes are opened on each of the multiple filter screens (532). The diameter of the filter holes on the multiple filter screens (532) decreases in an arithmetic sequence.

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