A heat exchanger for an air energy unit

Abstract

The invention discloses a heat exchanger for an air energy unit. It includes a plurality of sheet-shaped heat exchangers, a connecting pipe and a heating water tank. The heat exchangers are in a square shape, and two adjacent heat exchangers are parallel to each other. The cross-sectional shapes of the upper side and the lower side of the heat exchangers are both semicircular. A refrigerant interface is provided at two corners of one of the upper side or the lower side of the heat exchanger. The connecting pipe includes a refrigerant inlet pipe and a refrigerant outlet pipe, one of the refrigerant interfaces is connected to the refrigerant inlet pipe, and the other refrigerant interface is connected to the refrigerant outlet pipe. A heating pipe is provided in the heating water tank, and the refrigerant inlet pipe and the refrigerant outlet pipe are both connected to the heating pipe in the heating water tank. The beneficial effects of the invention are: it is not easy to frost or ice, and the defrosting and deicing effects are good, thereby improving the cooling effect, and the structure is simple and the operation is convenient.

Description

Technical Field

[0001] The invention relates to the technical field related to exchangers, and in particular to a cold and hot exchanger of an air energy unit. Background Art

[0002] Heat exchanger is a device that transfers part of the heat of hot fluid to cold fluid, also known as heat exchanger. Heat exchanger plays an important role in chemical, petroleum, power, food and many other industrial production. In chemical production, heat exchanger can be used as heater, cooler, condenser, evaporator and reboiler, etc., and is widely used.

[0003] Heat exchanger is an energy-saving device that realizes heat transfer between materials between two or more fluids at different temperatures. It transfers heat from a higher temperature fluid to a lower temperature fluid, so that the fluid temperature reaches the specified index of the process to meet the needs of process conditions. It is also one of the main equipment to improve energy utilization. The heat exchanger industry involves nearly 30 industries such as HVAC, pressure vessels, reclaimed water treatment equipment, chemicals, and petroleum, forming an industrial chain. Data shows that in 2010, the market size of China's heat exchanger industry was about 50 billion yuan, mainly concentrated in the fields of petroleum, chemical industry, metallurgy, electricity, shipbuilding, central heating, refrigeration and air conditioning, machinery, food, and pharmaceuticals. Among them, the petrochemical field is still the largest market for the heat exchanger industry, with a market size of 15 billion yuan; the market size of heat exchangers in the power metallurgical field is about 8 billion yuan; the market size of heat exchangers in the shipbuilding industry is more than 4 billion yuan; the market size of heat exchangers in the machinery industry is about 4 billion yuan; the market size of heat exchangers in the central heating industry exceeds 3 billion yuan, and the food industry also has a market of nearly 3 billion yuan. In addition, aerospace vehicles, semiconductor devices, nuclear power conventional islands, wind turbines, solar photovoltaic power generation, polysilicon production and other fields require a large number of professional heat exchangers, and these markets are about 13 billion yuan in size. The domestic heat exchanger industry has made remarkable achievements in energy saving and efficiency improvement, improving heat transfer efficiency, reducing heat transfer area, reducing pressure drop, and improving device thermal strength. Based on the stable growth in demand for heat exchangers in the petroleum, chemical, electric power, metallurgy, shipbuilding, machinery, food, pharmaceutical and other industries, my country's heat exchanger industry will maintain steady growth in the future. From 2011 to 2020, my country's heat exchanger industry will maintain an average annual growth rate of about 10-15%, and by 2020, the scale of my country's heat exchanger industry is expected to reach 150 billion yuan.

[0004] Existing heat exchangers all adopt the coil method, and the heat exchanger often frosts during the heat exchange process, especially in the northern region of my country. After the heat exchanger has worked for a certain period of time, a thick layer of ice will form on the outside. If it is not defrosted and de-iced in time, the heat exchange effect of the entire heat exchanger will drop sharply. The defrosting and de-icing of a general heat exchanger will interrupt the work of the heat exchanger, and the defrosting and de-icing effect is not obvious. There is often residual frost placed between the gaps of the coil, thus affecting the heat exchange effect of the heat exchanger. Summary of the invention

[0005] The present invention aims to overcome the above-mentioned deficiencies in the prior art and provides a heat exchanger for an air energy unit with good heat exchange effect.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A heat exchanger for an air energy unit comprises a plurality of sheet-like heat exchange fins, a connecting pipe and a heating water tank, wherein the heat exchange fins are square in shape, and two adjacent heat exchange fins are parallel to each other. The upper cross-sectional shape and the lower cross-sectional shape of the heat exchange fins are both semicircular, and refrigerant interfaces are provided at two corners of the upper or lower sides of the heat exchange fins. The connecting pipe comprises a refrigerant inlet pipe and a refrigerant outlet pipe, wherein one refrigerant interface is connected to the refrigerant inlet pipe, and the other refrigerant interface is connected to the refrigerant outlet pipe. A heating pipe is provided in the heating water tank, and the refrigerant inlet pipe and the refrigerant outlet pipe are both connected to the heating pipe in the heating water tank.

[0008] The structural design of the sheet-like heat exchanger makes it difficult for frost and ice to form on the surface of the heat exchanger; the semicircular structure design of the upper and lower sides of the heat exchanger makes it difficult for frost and ice to form on the upper and lower sides of the heat exchanger, so even if frost and ice form between two adjacent heat exchanger fins, the frost and ice between the two sides will not be combined, resulting in a decrease in the cooling effect of the entire heat exchanger; the design of the connecting pipe makes the heat exchanger fins connected in parallel with each other, so the refrigerant enters the heat exchanger fin through the refrigerant inlet pipe and comes out of the heat exchanger fin through the refrigerant outlet pipe. The refrigerant directly enters each heat exchanger fin from the refrigerant inlet pipe, which can make the refrigerant in the heat exchanger fin fully play its role and ensure the cooling effect of the entire heat exchanger; the design that the refrigerant inlet pipe and the refrigerant outlet pipe are both connected to the heating pipe in the heating water tank makes the refrigerant in the refrigerant inlet pipe and the refrigerant outlet pipe heat the water in the heating water tank through the heating pipe, thereby improving the energy utilization rate.

[0009] Preferably, the upper and lower sides of the heat exchanger are both provided with first heating wires, which are wavy and evenly distributed on the upper and lower surfaces. The design of the first heating wires can quickly melt the frost and ice on the upper and lower sides of the heat exchanger; in addition, the shape design of the first heating wires makes the heating effect more evenly distributed, and the defrosting and deicing effect is more prominent.

[0010] Preferably, a plurality of protrusions are provided on the side of the heat exchanger fin, the shape of the protrusions is hemispherical, the protrusions are divided into a plurality of rows and are arranged longitudinally, each row of protrusions is provided with metal reinforcing ribs, the protrusions on each row are connected in series through the metal reinforcing ribs, and the two ends of the metal reinforcing ribs are respectively connected to the first heating wires on the upper and lower sides of the heat exchanger fins. Through the design of the protrusions and their shapes, the frost and ice between two adjacent heat exchanger fins will not be adsorbed due to the excessive smoothness of the surface of the heat exchanger fins, resulting in the frost and ice not being easy to fall from between the two adjacent heat exchanger fins; through the design of the metal reinforcing ribs, it can obtain heat from the first heating wire and transfer it to the protrusions, and hollow bubbles will appear at the position of the protrusions, so that there will be gaps between the two adjacent heat exchanger fins, so that defrosting and de-icing can be better performed.

[0011] Preferably, the protrusions on two adjacent rows of metal reinforcing ribs are arranged in a staggered manner. Through the arrangement and distribution of the protrusions, the bubble gaps between two adjacent heat exchange fins can be distributed more reasonably, making it easier for frost and ice between two adjacent heat exchange fins to fall off.

[0012] Preferably, the cross-section of the connecting pipe is semicircular, the arc surface of the connecting pipe faces upward, a second heating wire is arranged on the arc surface of the connecting pipe, the second heating wire is in an arc shape, the second heating wire covers the arc surface of the connecting pipe, and the second heating wire is connected to the first heating wire. Through the structural and shape design of the connecting pipe and the second heating wire, on the one hand, it is not easy to frost and ice on the connecting pipe and the first heating wire, and on the other hand, the second heating wire can be connected to the first heating wire to defrost and de-ice more quickly.

[0013] Preferably, a ventilation hole is provided at the center of the side of the heat exchange fin. The design of the ventilation hole enables effective air circulation between two adjacent heat exchange fins, making it easier for frost and ice between two adjacent heat exchange fins to fall off.

[0014] The beneficial effects of the present invention are: it is not easy to frost or ice, and has good defrosting and defrosting effects, thereby improving the cooling effect, and has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the structure of the heat exchanger;

[0017] Figure 3 is a schematic structural diagram of a first heating wire;

[0018] Figure 4 It is a structural diagram of the connecting pipe.

[0019] In the figure: 1. heat exchange plate, 2. connecting pipe, 3. metal reinforcement rib, 4. protrusion, 5. first heating wire, 6. second heating wire, 7. ventilation hole, 8. heating water tank, 9. heating pipe. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] like Figure 1 In the described embodiment, a heat exchanger of an air energy unit includes a plurality of sheet-shaped heat exchange plates 1, a connecting pipe 2 and a heating water tank 8. The heat exchange plates 1 are square in shape, and two adjacent heat exchange plates 1 are parallel to each other. The cross-sectional shapes of the upper side and the lower side of the heat exchange plates 1 are both semicircular. Refrigerant interfaces are provided at the two corners of the upper side or the lower side of the heat exchange plates 1. The connecting pipe 2 includes a refrigerant inlet pipe and a refrigerant outlet pipe, one of the refrigerant interfaces is connected to the refrigerant inlet pipe, and the other refrigerant interface is connected to the refrigerant outlet pipe. A heating pipe 9 is provided in the heating water tank 8, and the refrigerant inlet pipe and the refrigerant outlet pipe are both connected to the heating pipe 9 in the heating water tank 8. Figure 3 As shown, the upper and lower sides of the heat exchange plate 1 are both provided with first heating wires 5, and the first heating wires 5 are wavy in shape and evenly distributed on the upper and lower surfaces. Figure 2 As shown, a plurality of protrusions 4 are provided on the side of the heat exchanger 1. The protrusions 4 are hemispherical in shape. The protrusions 4 are divided into several rows and are arranged longitudinally. Each row of protrusions 4 is provided with metal reinforcing ribs 3. The protrusions 4 on each row are connected in series through the metal reinforcing ribs 3. The two ends of the metal reinforcing ribs 3 are respectively connected to the first heating wires 5 on the upper and lower sides of the heat exchanger 1. The protrusions on the adjacent rows of metal reinforcing ribs 3 are staggered. A ventilation hole 7 is provided at the center of the side of the heat exchanger 1. Figure 4 As shown, the cross-sectional shape of the connecting tube 2 is semicircular, the arc surface of the connecting tube 2 faces upward, a second heating wire 6 is provided on the arc surface of the connecting tube 2, the shape of the second heating wire 6 is arc-shaped, the second heating wire 6 covers the arc surface of the connecting tube 2, and the second heating wire 6 is connected to the first heating wire 5.

[0022] The structural design of the sheet-shaped heat exchanger 1 makes it difficult for the surface of the heat exchanger 1 to frost or ice; the design of the semicircular structure of the upper and lower sides of the heat exchanger 1 makes it difficult for the upper and lower sides of the heat exchanger 1 to frost or ice, so even if frost or ice forms between two adjacent heat exchangers 1, the frost or ice between the adjacent heat exchangers 1 will not form together, resulting in a reduction in the cooling effect of the entire heat exchanger; the design of the connecting pipe 2 makes the heat exchangers 1 connected in parallel, so the refrigerant enters the heat exchanger 1 through the refrigerant inlet pipe and comes out of the heat exchanger 1 through the refrigerant outlet pipe. The refrigerant directly enters each heat exchanger 1 from the refrigerant inlet pipe, which can make the refrigerant in the heat exchanger 1 fully play its role and ensure the cooling effect of the entire heat exchanger. The design of the first heating wire 5 can make the frost and ice on the upper and lower sides of the heat exchanger 1 melt quickly; the shape design of the first heating wire 5 makes the heating effect more evenly distributed and the defrosting and deicing effect more prominent. Through the design of the ventilation holes 1 and the protrusions 4 and their shapes, the frost and ice between two adjacent heat exchanger plates 1 will not be adsorbed because the surface of the heat exchanger plates 1 is too smooth, which makes it difficult for the frost and ice to fall from between the two adjacent heat exchanger plates 1; through the design of the metal reinforcing ribs 3, it can obtain heat from the first heating wire 5 and transfer it to the protrusions 4. Hollow bubbles will appear at the location of the protrusions 4, and with the air in the ventilation holes 7, there will be a gap between the two adjacent heat exchanger plates 1, so that defrosting and deicing can be better performed. Through the arrangement and distribution of the protrusions 4, the distribution of the bubble gap between the two adjacent heat exchanger plates 1 can be made more reasonable, making it easier for the frost and ice between the two adjacent heat exchanger plates 1 to fall off. Through the structural and shape design of the connecting tube 2 and the second heating wire 6, on the one hand, it is not easy for frost and ice to form on the connecting tube 2 and the first heating wire 5, and on the other hand, the second heating wire 6 connected to the first heating wire 5 can be defrosted and deiced more quickly. By designing that both the refrigerant inlet pipe and the refrigerant outlet pipe are connected to the heating pipe 9 in the heating water tank 8, the refrigerant in the refrigerant inlet pipe and the refrigerant outlet pipe heats the water in the heating water tank 8 through the heating pipe 9, thereby improving energy utilization.

Claims

1. A heat exchanger for an air energy unit, characterized in that: The invention comprises a plurality of sheet-shaped heat exchange plates (1), a connecting pipe (2) and a heating water tank (8), wherein the heat exchange plates (1) are in a square shape, and two adjacent heat exchange plates (1) are parallel to each other, and the cross-sectional shapes of the upper side and the lower side of the heat exchange plates (1) are both semicircular, and refrigerant interfaces are provided at two corners of one of the upper side or the lower side of the heat exchange plates (1), and the connecting pipe (2) comprises a refrigerant inlet pipe and a refrigerant outlet pipe, wherein one refrigerant interface is connected to the refrigerant inlet pipe, and the other refrigerant interface is connected to the refrigerant outlet pipe, and the heating water tank (8) is provided with a heating pipe (9), and the refrigerant inlet pipe and the refrigerant outlet pipe are both connected to the heating water tank (8). ) is connected to the heating tube (9) in the heat exchange plate (1), the upper and lower sides of the heat exchange plate (1) are provided with first heating wires (5), the first heating wires (5) are wavy in shape and evenly distributed on the upper and lower surfaces, a plurality of protrusions (4) are provided on the side of the heat exchange plate (1), the protrusions (4) are hemispherical in shape, the protrusions (4) are divided into a plurality of rows and are arranged longitudinally, each row of protrusions (4) is provided with metal reinforcing ribs (3), the protrusions (4) on each row are connected in series through the metal reinforcing ribs (3), and the two ends of the metal reinforcing ribs (3) are respectively connected to the first heating wires (5) on the upper and lower sides of the heat exchange plate (1).

2. The heat exchanger of an air energy unit according to claim 1, characterized in that: The protrusions (4) on two adjacent rows of metal reinforcing ribs (3) are distributed in a staggered manner.

3. A heat exchanger for an air energy unit according to claim 1 or 2, characterized in that: The cross-sectional shape of the connecting tube (2) is semicircular, the arc surface of the connecting tube (2) faces upward, a second heating wire (6) is provided on the arc surface of the connecting tube (2), the second heating wire (6) is in the shape of an arc, the second heating wire (6) covers the arc surface of the connecting tube (2), and the second heating wire (6) is connected to the first heating wire (5).

4. A heat exchanger for an air energy unit according to claim 1 or 2, characterized in that: A ventilation hole (7) is provided at the center of the side surface of the heat exchange plate (1).

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