Anti-icing water collecting and draining device suitable for heat pump heat exchanger
By introducing an air duct unit and a negative pressure air cavity into the heat pump heat exchanger and utilizing the heat from the heat pump's own reactor to heat the water collection and drainage device, the problem of defrost water freezing is solved, the heating efficiency and energy efficiency of the heat pump are improved, and the use of additional heating elements is avoided.
Patent Information
- Application Number
- CN202422574160.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-10-23
AI Technical Summary
In cold and humid winters, the outdoor heat exchanger of a heat pump is prone to frost, causing defrost water to fail to be discharged in time or to refreeze in the drain tank, affecting heat exchange efficiency and potentially damaging the equipment. Existing technologies use heating elements to solve this problem, increasing energy consumption and costs.
By introducing an air duct unit and a negative pressure air cavity into the water collection and drainage device of the heat pump heat exchanger, and using the heat pump's own reactor or other heating components as a heat source, the heat is recovered and used to heat the water collection and drainage device to prevent freezing, and electric heating wires are used for auxiliary heating when necessary.
Without increasing energy consumption and costs, it effectively prevents the freezing of water collection and drainage devices, improves the heating capacity and energy efficiency of heat pump heat exchangers, and reduces maintenance issues.
Smart Images
Figure CN223425404U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat pumps, in particular to an anti-icing water collection and drainage device suitable for a heat pump heat exchanger. Background Art
[0002] Heat pumps offer multiple advantages, including low cost, ease of operation, effective heating, safety, and cleanliness. They can convert low-grade heat energy that cannot be directly utilized into usable high-grade heat energy, thereby saving some of that high-grade heat energy. With the continuous advancement of science and technology, heat pumps have been widely used. Current products include residential heat pump air conditioners, commercial unitary heat pump air conditioning units, and heat pump hot and cold water units. However, in cold and humid winters, the outdoor heat exchanger of a heat pump is prone to frost, which not only reduces its heating efficiency but can also damage the equipment. Frost formation increases the heat exchanger's thermal resistance, hindering air circulation, resulting in reduced heating capacity and energy efficiency, and ultimately, energy waste.
[0003] Currently, most heat pumps are equipped with an automatic defrost function, which melts the frost layer by heating. However, in the severe winter in the north, when the heat pump is running in defrost mode, the defrost water may not be discharged from the water tray in time and may refreeze into ice, or after the defrost water is discharged from the water tray, due to the low ambient temperature, secondary freezing occurs in the drain trough, which may eventually affect the heat exchange efficiency of the heat exchanger and even cause damage to the heat exchanger and refrigerant leakage. In order to solve this problem, the existing technology achieves the effect of timely and thorough discharge of defrost water by reasonably arranging heating elements at the water collection and drainage device (water tray and drain trough) at the bottom of the heat pump heat exchanger. However, the additional provision of heating elements will increase the energy efficiency and cost of the heat pump unit, and the heating elements may also have safety problems caused by dry burning or overheating.
[0004] Therefore, how to solve the problem of ice formation in the water receiving tray and secondary ice formation in the drain tank in the heat exchanger without increasing the energy consumption and cost of the heat pump unit has become a technical problem that needs to be solved urgently in the field of heat pump technology. Utility Model Content
[0005] Based on this, the purpose of the present invention is to overcome the defects or shortcomings of the prior art and provide an anti-icing water collection and drainage device suitable for a heat pump heat exchanger.
[0006] An anti-icing water collection and drainage device suitable for a heat pump heat exchanger includes a water receiving pan with a plurality of drainage holes provided thereon; an air duct unit including an air inlet, an air outlet, and a pipe with an opening and a drainage hole provided on the pipe wall; the opening is connected to the drainage hole, and a drainage hole is provided on the pipe wall opposite to the opening, and the air duct unit is in contact with the water receiving pan; a fan, the air outlet of the air duct unit is located on the suction surface of the fan, and under the action of the fan, hot air circulates in the air duct unit through the air inlet to heat the water receiving pan and the air duct unit.
[0007] Specifically, the size of the drainage hole can be determined according to the amount of defrost water at the location of the drainage hole. When the amount of defrost water at the location of the drainage hole is relatively large, the size of the drainage hole can be increased accordingly.
[0008] Furthermore, the water receiving tray also includes an electric heating wire arranged on it through the drainage hole; adding an electric heating wire to the water receiving tray can prevent the defrost water from freezing on the water receiving tray when the hot air does not carry enough heat. The electric heating wire can be activated or not depending on the amount of heat.
[0009] Furthermore, the water receiving tray is a tray with a high center and low surroundings, and a plurality of drainage holes are provided at the low position of the water receiving tray to ensure that water can flow from the center of the water receiving tray to the surroundings and finally be discharged through the drainage holes to prevent water from accumulating on the water receiving tray.
[0010] Furthermore, the water receiving tray is provided with upwardly bent flanges around its periphery to prevent water from overflowing from the water receiving tray.
[0011] Specifically, the tube of the air duct unit is a long tube, a U-shaped tube, a V-shaped tube, or a curved tube.
[0012] Specifically, when the tube of the air duct unit is a long tube, its diameter gradually increases from small to large, and the drain outlet is arranged on the tube wall at the largest diameter of the tube; the two ends of the tube are not sealed, one end is used as an air inlet, and the other end is used as an air outlet; several of the tubes can be set, and the several tubes are arranged at intervals in the lower part of the water receiving tray, and each of the several tubes is arranged in parallel in the lower part of the water receiving tray.
[0013] Specifically, when the tube of the air duct unit is a U-shaped tube, a V-shaped tube or a curved tube, its diameter changes from small to large from the middle toward the two ends, and the drain outlet is arranged on the tube wall at the largest diameter at both ends of the tube; the air outlet of the tube is arranged on the tube wall, and the two ends of the tube are not sealed, both serving as air inlets, and the air outlet is arranged as far away from the two ends as possible, that is, at the bend or curvature; a plurality of the tubes can be arranged, and the plurality of the tubes are arranged at intervals in a concentric circle manner at the lower part of the water receiving tray.
[0014] Furthermore, the air duct unit also includes a negative pressure air cavity, which is vertically connected to the water receiving tray. The negative pressure air cavity is connected to the pipe through the drainage hole on the water receiving tray. At this time, the opening on the negative pressure air cavity is the air outlet of the air duct unit, and both ends of the pipe are air inlets.
[0015] Specifically, the negative pressure air cavity is a hollow cavity having a cross-section that is the same as the arrangement structure of the drainage holes.
[0016] Specifically, the tube is a U-shaped tube, the drainage holes are arranged in a U-shaped structure, and the cross-section of the negative pressure air cavity is a hollow cavity with a U-shaped structure.
[0017] Furthermore, the anti-icing water collection and drainage device also includes a heat source, which is the reactor of the heat pump heat exchanger itself. By recycling the heat of the reactor and transferring it to the water collection pan, the water collection pan can be prevented from freezing, the heating capacity and heating efficiency of the heat pump heat exchanger can be improved, and energy saving and environmental protection can be achieved.
[0018] Specifically, the reactor is arranged near the air inlet, and specifically, two reactors are respectively arranged at both ends of the U-shaped tube.
[0019] Furthermore, it also includes a reactor cover, which is located outside the reactor and is used to protect the reactor from physical damage and environmental factors.
[0020] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a structural diagram of the distribution of various mechanisms of the anti-icing device involved in Example 1 of the present utility model;
[0022] Figure 2 This is a structural diagram of a water receiving tray of an anti-icing device according to Example 1 of the present utility model;
[0023] Figure 3 This is a structural diagram of a long tube of the anti-icing device involved in Example 1 of the present utility model;
[0024] Figure 4 This is a top view of the U-shaped tube structure of the anti-icing device involved in Example 1 of the present utility model;
[0025] Figure 5 This is a perspective structural diagram of a U-shaped tube of the anti-icing device involved in Example 1 of the present utility model;
[0026] Figure 6 This is a structural diagram of the distribution of various mechanisms of the anti-icing device involved in Example 2 of the present utility model;
[0027] Figure 7 This is a modeling diagram of the distribution structure of each mechanism of the anti-icing device involved in Example 2 of the present utility model;
[0028] Figure 8 This is a structural diagram of a water receiving tray of an anti-icing device according to Example 2 of the present utility model;
[0029] Figure 9 This is a top view of the U-shaped tube structure of the anti-icing device according to Example 2 of the present utility model;
[0030] Figure 10 This is an oblique structural diagram of the U-shaped tube of the anti-icing device involved in Example 2 of the present utility model. DETAILED DESCRIPTION
[0031] When the fan is operating, the airflow generated by its operation increases the velocity and decreases the pressure at the fan's air intake surface. This creates a negative pressure in this area relative to the surrounding environment. Driven by atmospheric pressure, the outside air flows into this negative pressure area. When the outside air carries a certain amount of heat and flows through the water collection and drainage device through a specific air flow channel, it is heated.
[0032] Heat pump heat exchangers also contain reactor components, whose primary function is to limit short-circuit current, suppress harmonics, maintain voltage stability, and improve the system's shock resistance. When operating in ultra-low temperature environments, the heat pump heat exchanger's relatively poor heat transfer capacity leads to higher operating currents and, consequently, higher reactor temperatures. When the heat carried by the outside air is transferred from the heat pump heat exchanger's own reactor, the heat generated by the system can be further recovered and reused.
[0033] Therefore, the utility model optimizes the water collection and drainage device, utilizes air with heat generated by a heat source to circulate in a specific air flow channel to heat the water collection and drainage device, thereby preventing the water collection and drainage device from freezing in an extremely low temperature environment, and improving the heating capacity and energy efficiency of the heat pump heat exchanger; further, the reactor in the heat pump heat exchanger is selected as the heat source, and the water collection and drainage device is heated by recycling the heat generated by the reuse system; further, other heating components of the heat pump heat exchanger can also be selected as the heat source, such as the condenser.
[0034] The solution of the utility model is described in detail below with reference to the accompanying drawings.
[0035] Example 1
[0036] like Figures 1 to 2The embodiment 1 of the utility model discloses a kind of anti-icing water-collecting and draining devices suitable for heat pump heat exchanger, including water pan 10, air duct unit 20 and fan 30, air duct unit 20 is contacted with the water pan 10 and is set below it, water pan 10 and air duct unit 20 are located the suction surface of fan 30;Under the action of fan 30, the external air with heat is circulated in specific air duct unit 20 to heat water pan 10 and air duct unit 20.
[0037] Water pan 10 is equipped with several drainage holes 11.
[0038] Further, water pan 10 further includes electric heating wire 12 that is set on it and penetrates drainage hole 11.
[0039] Further, water pan 10 is the disc body of center high and periphery low, and several drainage holes 11 are set at low position of water pan 10.
[0040] Further, water pan 10 is equipped with upwardly bent flanging around.
[0041] Specifically, the size of drainage hole 11 can be determined according to the defrosting water amount at the position of drainage hole, when the defrosting water at the position of drainage hole 11 is more, the size of drainage hole 11 can be increased accordingly.
[0042] Air duct unit 20 includes pipe 21 equipped with opening 211 and drainage port 212, opening 211 is set in the pipe wall of pipe 21, drainage port 212 is set in the opposite side pipe wall of opening 211, opening 211 is penetrated with drainage hole 11, defrosting water can flow into pipe 21 through drainage hole 11 and opening 211, and then defrosting water is discharged through drainage port 212.
[0043] Air duct unit 20 further includes air inlet 22 and air outlet 23.
[0044] Specifically, pipe 21 can be long strip pipe, or can be U-shaped or V-shaped pipe.
[0045] As shown in the drawings, Figure 3 Specifically, when pipe 21 is long strip pipe, its diameter gradually increases from small to large, drainage port 212 is set in the pipe wall at the largest diameter of pipe 21, and the two ends of pipe 21 are not sealed, one end is air inlet 22, and the other end is air outlet 23. Several long strip pipes 21 can be set, and several long strip pipes 21 are set in the lower part of water pan 10 with interval, and each of the several long strip pipes 21 is set in parallel in the lower part of water pan 10.
[0046] As shown in the drawings, Figures 4 and 5Specifically, when the tube 21 is a U-shaped tube, its diameter decreases from the center toward the two ends. Drain ports 212 are located at the tube wall at the largest diameter points at both ends of the tube 21. Both ends of the tube 21 are unsealed and serve as air inlets 22. The air outlet 23 is located at the tube wall at the bend, as far away from the two ends as possible. Multiple U-shaped tubes 21 may be provided, and these tubes 21 are spaced apart in a concentric circle arrangement at the bottom of the water receiving tray 10.
[0047] Furthermore, the fan 30 is arranged near the air outlet 23 of the tube 21 , the fan 30 blows air outward, and the air outlet 23 is arranged on the air intake surface of the fan 30 .
[0048] When the fan 30 is started, the fan 30 blows air outward, and a negative pressure area is formed on the other side. Since the air duct unit 20 is located at the air intake surface of the fan 30, that is, the negative pressure area, driven by atmospheric pressure, the external air with heat flows through the air duct unit 20 through the air inlet 22 and the air outlet 23 in turn. In this process, the docking water tray 10 and the air duct unit 20 are heated, which has the effect of preventing freezing.
[0049] Example 2
[0050] like Figures 6 to 10 As shown, an anti-icing water collection and drainage device suitable for a heat pump heat exchanger according to embodiment 2 of the present invention includes a water receiving tray 10, an air duct unit 20, a fan 30 and a heat source 40. The air duct unit 20 passes through the water receiving tray 10 and contacts it. The water receiving tray 10 and the air duct unit 20 are located on the air intake surface of the fan 30. Under the action of the fan 30, external air with heat generated by the heat source 40 circulates in a specific air duct unit 20 to heat the water receiving tray 10 and the air duct unit 20.
[0051] The water receiving tray 10 is provided with a plurality of drainage holes 11 , and the plurality of drainage holes 11 are arranged in a U-shaped structure.
[0052] Furthermore, the water receiving tray 10 further includes an electric heating wire 12 penetrating the drainage hole 11 and disposed thereon.
[0053] Furthermore, the water receiving tray 10 is a tray body with a high center and low surroundings, and a plurality of drainage holes 11 are provided at a low position of the water receiving tray 10 .
[0054] Furthermore, the water receiving tray 10 is provided with upwardly bent flanges around its periphery.
[0055] Specifically, the size of the drain hole 11 can be determined according to the amount of defrost water at the location of the drain hole. When the amount of defrost water at the location of the drain hole 11 is large, the size of the drain hole 11 can be increased accordingly.
[0056] The air duct unit 20 includes a tube 21 , an air inlet 22 , an air outlet 23 and a negative pressure air cavity 24 .
[0057] The tube 21 is a U-shaped tube, which is arranged below the water receiving tray 10. It includes an opening 211 arranged in the tube wall and a drain outlet 212 provided on the tube wall opposite to the opening 211. The opening 211 is connected to the drain hole 11. The defrost water in the water receiving tray 10 can flow into the tube 21 through the drain hole 11 and the opening 211, and then be discharged through the drain outlet 212. The two ends of the tube 21 are not sealed, and both ends are air inlets 24.
[0058] Furthermore, the diameter of the tube 21 changes from small to large from the middle toward the two ends.
[0059] Furthermore, the drain outlets 212 are provided at the pipe walls of the pipe 21 at both ends where the diameter is the largest.
[0060] The negative pressure air chamber 24 is a hollow cavity with a U-shaped cross-section. The heat exchanger coils and other components are housed within this hollow cavity. The negative pressure air chamber 24 is perpendicularly connected to the water tray 10. The U-shaped structure of the negative pressure air chamber 24 is connected to the drainage holes 11 arranged in a U-shaped pattern on the water tray 10. A fan 30 is installed at the upper opening of the negative pressure air chamber 24. The lower opening of the negative pressure air chamber 24 is connected to the pipe 21 through the drainage holes 11 on the water tray 10. The upper opening of the negative pressure air chamber 24 serves as the air outlet 23.
[0061] Specifically, the negative pressure air chamber 24 includes a first hollow plate 241, a second hollow plate 242, and a third hollow plate 243, which are connected in sequence. The first hollow plate 241 and the third hollow plate 243 are arranged parallel to each other, and the second hollow plate 242 is perpendicular to the first hollow plate 241 and the third hollow plate 243. Both sides of the second hollow plate 242 are connected to the same side of the first hollow plate 241 and the third hollow plate 243, while the other side of the first hollow plate 241 and the third hollow plate 243 is closed. In order to illustrate the relationship that the coil and various components are arranged in the hollow cavity, the closed end is not shown in the drawings.
[0062] The fan 30 is arranged above the negative pressure air cavity 24 , and blows air upward and outward. The negative pressure air cavity 24 is arranged on the suction surface of the fan 30 .
[0063] The heat source 40 is a reactor within the heat pump heat exchanger system. The heat source 40 is disposed at the air inlet 22 of the tube 21. In this embodiment, two heat sources 40 are disposed at each end of the tube 21. Furthermore, the heat source 40 includes a reactor cover, which is located outside the reactor and protects the reactor from physical damage and environmental factors.
[0064] When the motor 11 at the top is running, the airflow generated by the motor causes the pressure on its air intake surface to be lower than the external atmospheric pressure. Under the action of the pressure difference, the external air first flows through the heat source 40 with a higher temperature, enters the tube 21 from the air inlet 22, enters the negative pressure air chamber 24 through the drain hole 11 on the water receiving tray 10, and then flows out from the air outlet 23. In this process, the external air first absorbs heat from the heat source 40. The external air has a higher temperature and will transfer heat to the water receiving tray 10 and the air duct unit 20. The heated external air releases heat, causing its temperature to drop, while the water receiving tray 10 and the air duct unit 20 absorb heat, causing their temperature to rise. This can effectively prevent the defrost water from freezing in the water receiving tray 10 and the air duct unit 20, achieving an anti-freezing effect.
[0065] Compared to existing technologies, this heat recovery method not only operates more efficiently in low-temperature environments, reducing maintenance issues caused by icing, but also improves energy efficiency and helps improve the overall performance of the heat pump heat exchanger.
[0066] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the claims are also intended to include plural forms, unless the context clearly indicates other meanings. The terms "first", "second", "third" and the like are only used to distinguish and are not used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. When the above description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. In the description of the present application, for those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.
[0067] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.
Claims
1. An anti-icing water collection and drainage device suitable for a heat pump heat exchanger, characterized in that: include: A water receiving tray having a plurality of drainage holes; An air duct unit comprising an air inlet, an air outlet, and a pipe with an opening and a drain outlet provided on the pipe wall; the opening is connected to the drain hole, and a drain outlet is provided on the pipe wall opposite to the opening, and the air duct unit is in contact with the water receiving tray; The air outlet of the fan and the air duct unit is located on the suction surface of the fan. Under the action of the fan, hot air circulates in the air duct unit through the air inlet to heat the docking water tray and the air duct unit.
2. The anti-icing water collection and drainage device for a heat pump heat exchanger according to claim 1, characterized in that: The tube is a long tube, a U-shaped tube, a V-shaped tube or a curved tube.
3. The anti-icing water collection and drainage device for a heat pump heat exchanger according to claim 2, characterized in that: The two ends of the long tube are not sealed, one end is used as an air inlet, and the other end is used as an air outlet.
4. The anti-icing water collection and drainage device for a heat pump heat exchanger according to claim 2, characterized in that: Both ends of the U-shaped tube, V-shaped tube or curved tube that are not sealed serve as air inlets, and the air outlet is arranged on the tube wall that is as far away from the two ends as possible.
5. The anti-icing water collection and drainage device for a heat pump heat exchanger according to claim 2, characterized in that: The air duct unit also includes a negative pressure air cavity, which is vertically connected to the water receiving tray. The negative pressure air cavity is connected to the pipe through the drainage hole on the water receiving tray. The opening on the negative pressure air cavity is the air outlet of the air duct unit, and both ends of the pipe are air inlets.
6. The anti-icing water collection and drainage device for a heat pump heat exchanger according to claim 5, characterized in that: The negative pressure air cavity is a hollow cavity with a cross section having the same arrangement structure as the drainage holes.
7. The anti-icing water collection and drainage device for a heat pump heat exchanger according to claim 6, characterized in that: The tube is a U-shaped tube, the drainage holes are arranged in a U-shaped structure, and the cross section of the negative pressure air cavity is a hollow cavity of the U-shaped structure.
8. The anti-icing water collection and drainage device for a heat pump heat exchanger according to claim 7, characterized in that: It also includes a heat source, which is the reactor of the heat pump heat exchanger itself, and the reactor is arranged near the air inlet of the air duct unit.
9. The anti-icing water collection and drainage device for a heat pump heat exchanger according to claim 2, characterized in that: The water receiving tray is a tray body with a high center and low peripheries, and a plurality of drainage holes are arranged at the low positions of the water receiving tray.
10. The anti-icing water collection and drainage device for a heat pump heat exchanger according to claim 9, characterized in that: The water tray also includes an electric heating wire.