Deformation type heat pump unit anti-freezing device

Abstract

The utility model discloses a deformation type heat pump unit anti-freezing device, which relates to the technical field of heat pump unit equipment and comprises a deformation pipe, reaction pipes are fixedly arranged at the left end and the right end of the deformation pipe, the side walls of the reaction pipes are tightly attached to the side wall of the deformation pipe, and the contact surfaces of the reaction pipes and the deformation pipe are made of heat conduction materials. Connecting pipes are fixedly arranged on the outer sides of the two reaction pipes, the interiors of the connecting pipes, the reaction pipes and the deformation pipes are sequentially communicated to form a channel for hot water to pass through, and the connecting pipes are connected to a hot water supply pipe; an annular reaction cavity is formed in the reaction tube, and a filling agent capable of generating an endothermic reaction is stored in the reaction cavity; an annular cavity is formed in the deformation pipe, and the cavity is filled with a proper amount of water; the double-pipe heat exchanger drainage device is installed on a heat supply water pipe, is simple in structure, is not limited by sites, can automatically drain water from the double-pipe heat exchanger under the condition that the double-pipe heat exchanger is not electrified at the low temperature, and prevents the situation that the double-pipe heat exchanger is frozen to crack due to the fact that a heat pump unit does not drain water in time under the low-temperature environment.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pump unit equipment, in particular to a deformation type heat pump unit antifreeze device. Background Art

[0002] In winter in colder places, in most cases, heating is started once the temperature drops below 10 degrees Celsius to ensure people's normal life. Central heating is usually provided by heating companies in cities, but in rural or remote areas with low population density, independent heat pump units are usually used for heating to reduce heating costs; however, when a winter cold wave suddenly arrives and the user has not yet turned on the heat pump unit, or on a cold night, when the heat pump unit suddenly stops working due to abnormal circumstances, the non-working heat pump unit often freezes and cracks due to failure to drain water in time; once the shell and tube heat exchanger freezes and cracks, water will enter the refrigerant pipeline, and the entire heat pump unit will be unable to operate and need to be returned to the factory for repair. In severe cases, the entire unit may even be scrapped, causing losses to users. At the same time, during the repair period, it will cause great inconvenience for users to find other heating methods.

[0003] Although mainstream heat pump products on the market are now equipped with anti-freeze functions, the heat pump unit needs to be powered on all the time, which wastes electricity. In addition, in some remote areas, due to factors such as power supply capacity and site, the heat pump unit cannot be powered on for a long time. When the power supply line fails, if the user does not drain the water in time, the heat pump unit equipped with anti-freeze function will also have frozen and cracked casing heat exchangers. Utility Model Content

[0004] The utility model aims to provide a deformation-type antifreeze device for a heat pump unit, which is installed on a hot water supply pipe, has a simple structure, is not restricted by the site, and can automatically drain the shell and tube heat exchanger when the temperature is low and the power is off, thereby preventing the shell and tube heat exchanger from freezing and cracking due to failure to drain the water in time in a heat pump unit under a low temperature environment.

[0005] The utility model comprises a deformation tube, reaction tubes are fixedly arranged at both left and right ends of the deformation tube, the side walls of the reaction tubes are closely attached to the side walls of the deformation tube, and the contact surfaces of the reaction tubes and the deformation tubes are made of heat-conducting materials; connecting tubes are fixedly arranged at the outer sides of the two reaction tubes, the connecting tubes, the reaction tubes and the interiors of the deformation tubes are sequentially connected to form a channel for hot water to pass through, and the connecting tubes are connected to the hot water supply pipes; an annular reaction chamber is arranged in the reaction tube, and a filler capable of generating an endothermic reaction is stored in the reaction chamber; an annular cavity is arranged in the deformation tube, and the cavity is filled with an appropriate amount of water.

[0006] Preferably, an annular plate is provided in the reaction chamber, which divides the reaction chamber into two inner and outer annular parts, the inner and outer annular parts are respectively filled with different reactants, and a through hole is provided on the annular plate, the through hole is blocked with an air bag, and the air bag is filled with air.

[0007] Preferably, the airbag is made of an anti-corrosion material, and has an elliptical shape, with the major axis of the ellipse parallel to the thickness direction of the annular plate, and the side of the airbag abuts against the side wall of the through hole.

[0008] Preferably, a plurality of through holes are provided, which are arranged on the annular plate at intervals and around the center of the annular plate, and each through hole is blocked with an air bag.

[0009] Preferably, a solution bag is provided in the reaction chamber, the solution bag is semi-annular and fixedly arranged in the upper half of the reaction chamber, and different reactants are respectively filled in the reaction chamber and the solution bag; a deformation puncturing mechanism is provided on the side of the solution bag, and the deformation puncturing mechanism comprises an outer cavity fixedly arranged on the side of the reaction tube, the outer cavity is an elongated cylindrical tubular structure with one end open, a piston for blocking the opening is provided in the outer cavity, the outer diameter of the piston is adapted to the inner diameter of the outer cavity, and the outer cavity is filled with water; a piston rod is fixedly arranged at the outer end of the piston, a puncturing nail capable of puncturing the solution bag is connected to the end of the piston rod, the nail tip of the puncturing nail extends into the reaction chamber and is attached to the side wall of the solution bag.

[0010] Preferably, there are a plurality of deformation puncturing mechanisms, which are arranged around the center of the reaction chamber at intervals in the upper half of the reaction chamber.

[0011] Preferably, the solution bag is a thin-walled bag made of an anti-corrosion rubber material.

[0012] Preferably, needles are fixedly provided on the inner and outer sides of the deformable tube, and the needles are attached to the side walls of the deformable tube.

[0013] Preferably, the fillers in the reaction chamber are ammonium chloride solution and barium hydroxide solution.

[0014] Preferably, a heat dissipation ring is fixedly provided on the outside of the deformation tube, a gap for liquid to pass through is reserved between two adjacent heat dissipation rings, and a heat sink is fixedly connected to the outside of the heat dissipation ring.

[0015] In summary, the utility model has the following beneficial effects:

[0016] 1. It can drain the shell and tube heat exchanger of the heat pump unit when needed without power, which solves the problem that the antifreeze function of the heat pump unit on the market needs to be powered on and cannot be used after power failure, and prevents the shell and tube heat exchanger from freezing and cracking due to failure to drain water in a low-temperature environment; at the same time, it has a simple structure and is installed on the hot water pipe. It is an additional device outside the heat pump unit, and does not need to change the original structure. It is not restricted by the brand and size of the heat pump unit, and is not limited by space and site, and has a wide range of applications;

[0017] 2. The two chemical substances that produce endothermic reactions are separated. Only when the temperature is low and the hot water pipes need to be antifreeze, the device will be triggered to combine the two chemical substances and finally drain water. When the temperature is high or the heat pump unit is operating normally, water will not be drained and the normal use of the heat pump unit will not be affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a first embodiment of a deformation type heat pump unit antifreeze device of the utility model;

[0019] Figure 2 is a cross-sectional view of embodiment 1;

[0020] Figure 3 for Figure 2 A in the enlarged view;

[0021] Figure 4 This is a schematic diagram of the structure of the first embodiment after the heat dissipation ring and the heat dissipation fin are installed;

[0022] Figure 5 It is a schematic diagram of the structure of the heat sink ring and the heat sink;

[0023] Figure 6 This is a structural schematic diagram of a second embodiment of a deformation type heat pump unit antifreeze device of the utility model;

[0024] Figure 7 is a cross-sectional view of embodiment 2;

[0025] Figure 8 for Figure 7 The enlarged view of point B in the figure;

[0026] Fig. 9 This is a schematic diagram of the structure of Example 2 after the heat dissipation ring and heat sink are installed.

[0027] In the figure: 1. deformation tube; 2. reaction tube; 3. connecting tube; 4. reaction chamber; 5. cavity; 6. annular plate; 7. through hole; 8. air bag; 9. deformation puncturing mechanism; 901. outer cavity; 902. piston; 903. piston rod; 904. puncturing nail; 10. solution bag; 11. puncture needle; 12. heat dissipation ring; 13. heat sink. DETAILED DESCRIPTION

[0028] The utility model will be further described below in conjunction with the accompanying drawings.

[0029] The orientations mentioned in this specification are based on the orientations of the antifreeze device of a deformable heat pump unit of the utility model when it is working normally, and do not limit the orientations during storage and transportation. They only represent relative position relationships, not absolute position relationships.

[0030] like Figures 1 to 9 As shown together, a deformation type heat pump unit antifreeze device comprises a deformation tube 1, reaction tubes 2 are fixedly arranged at both left and right ends of the deformation tube 1, the side walls of the reaction tube 2 are closely attached to the side walls of the deformation tube 1, the contact surfaces of the reaction tube 2 and the deformation tube 1 are made of heat conductive material, and good heat conduction can be achieved between the two; connecting tubes 3 are fixedly arranged on the outsides of the two reaction tubes 2, the connecting tubes 3, the reaction tubes 2 and the interiors of the deformation tube 1 are connected in sequence to form a channel for hot water to pass through, the connecting tubes 3 are connected to the hot water supply pipe, and the hot water in the hot water supply pipe flows through the connecting tube 3 on the left side in sequence into the antifreeze device, and flows out from the connecting tube 3 on the right side; an annular reaction chamber 4 is arranged in the reaction tube 2, and a filler capable of generating an endothermic reaction is stored in the reaction chamber 4, preferably, the filler in the reaction chamber 4 is an ammonium chloride solution and a barium hydroxide solution, which will generate an endothermic reaction after contact, absorb the surrounding heat, and condense the surrounding water droplets into ice.

[0031] The deformable tube 1 is a double-layer thin-walled tube made of brittle material, and its hardness can support the antifreeze device, but it is easy to break when under pressure; an annular cavity 5 is provided in the deformable tube 1, and the cavity 5 is filled with an appropriate amount of water. When the cavity 5 is full of water, at a relatively low ambient temperature, the ammonium chloride solution and the barium hydroxide solution in the reaction chamber 4 react chemically to absorb the heat of the water in the cavity 5, so that the temperature of the water in the cavity 5 is further reduced to be lower than the temperature of the water in the hot water pipe until it freezes. When the water freezes, its volume expands, thereby breaking the side wall of the deformable tube 1 to form a water flow channel, so that the water in the water supply pipe is discharged from the rupture of the deformable tube 1, thereby achieving the purpose of protecting the heat pump unit.

[0032] Furthermore, needles 11 are fixedly provided on the inner and outer sides of the deformation tube 1, and the needles 11 are attached to the side walls of the deformation tube 1. When the deformation tube 1 is slightly deformed and cracks appear, the deformation tube 1 is more likely to have cracks under the action of the needles 11. Once cracks appear on the side walls of the deformation tube 1, the cracks are further broken and torn under the action of the hot water pressure in the hot water pipe, resulting in larger cracks to achieve rapid drainage.

[0033] Furthermore, a heat dissipation ring 12 is fixedly provided on the outside of the deformation tube 1, and a gap for liquid to pass through is left between two adjacent heat dissipation rings 12. A heat sink 13 is fixedly connected to the outside of the heat dissipation ring 12. On the one hand, the heat dissipation ring 12 can serve as a support for the deformation tube 1 to prevent it from being damaged. On the other hand, it can accelerate the dissipation of heat of the water in the deformation tube 1, so that it can break and drain water in time when the temperature reaches the freezing point, thereby achieving the purpose of protecting the heat pump unit.

[0034] In order to ensure that the ammonium chloride solution and the barium hydroxide solution in the reaction chamber 4 will only contact and react when the ambient temperature reaches the freezing point of water, it is necessary to separate the ammonium chloride solution and the barium hydroxide solution to ensure that they remain isolated under non-low temperature conditions. The separation scheme of the utility model is designed with two embodiments.

[0035] Embodiment 1:

[0036] like Figures 1 to 4 As shown together, an annular plate 6 is provided in the reaction chamber 4, and the annular plate 6 divides the reaction chamber 4 into two inner and outer annular parts. The inner and outer annular parts are filled with different reactants respectively. The reaction chamber 4 located on the outer side is filled with ammonium chloride solution, and the reaction chamber 4 located on the inner side is filled with barium hydroxide solution. The two are separated by the annular plate 6. When the temperature is above the freezing point of water, the two solutions will not contact and react; a through hole 7 is provided on the annular plate 6, and an air bag 8 is blocked in the through hole 7. The air bag 8 is filled with air. The air bag 8 is made of an anti-corrosion elastic material, and the volume of the air bag 8 can change with the change of the gas volume in the air bag 8; the shape of the air bag 8 is elliptical, and the major axis of the ellipse is parallel to the thickness direction of the annular plate 6. The side of the air bag 8 is against the side wall of the through hole 7 to increase the contact area between the air bag 8 and the side wall of the through hole 7, and the through hole 7 is completely blocked to prevent the two solutions from mixing and reacting.

[0037] When the air temperature drops to about the freezing point of water, the gas in the airbag 8 will shrink due to thermal expansion and contraction, making the volume of the airbag 8 smaller, and a gap will appear between the airbag 8 and the side wall of the through hole 7. The ammonium chloride solution passes through the gap and mixes with the barium hydroxide solution in the lower reaction chamber 4, causing an endothermic reaction, cooling the deformable tube 1, causing the water inside it to freeze and expand, thereby breaking the side wall of the deformable tube 1, and allowing the water in the water supply pipe to be discharged from the ruptured part of the deformable tube 1, thereby achieving the purpose of protecting the heat pump unit; preferably, a plurality of through holes 7 are provided, centered on the center of the annular plate 6, and arranged on the annular plate 6 at intervals, and each through hole 7 is blocked with an airbag 8; it should be noted that the initial volume of the airbag 8 and the volume of the airbag 8 when the air temperature is around the freezing point of water need to be determined based on experimental measurements to ensure its performance.

[0038] Embodiment 2:

[0039] like Figures 6 to 9 As shown together, the difference between this embodiment and the first embodiment is that a solution bag 10 is provided in the reaction chamber 4, and the solution bag 10 is a thin-walled bag made of an anti-corrosion rubber material. The solution bag 10 stores an ammonium chloride solution, and the reaction chamber 4 stores a barium hydroxide solution. The two are separated by the solution bag 10. When the temperature is above the freezing point of water, the two solutions will not contact and react; the solution bag 10 is semi-annular and fixedly arranged in the upper half of the reaction chamber 4; the side of the solution bag 10 is provided with a deformation puncture mechanism 9, and the deformation puncture mechanism 9 includes an outer cavity 901 fixedly arranged on the side of the reaction tube 2, and the outer cavity 901 is The outer cavity 901 is made of stainless steel, and is an elongated cylindrical tubular structure with one end open. The outer cavity 901 is filled with water. A piston 902 is provided in the outer cavity 901 to block the opening. The outer diameter of the piston 902 is adapted to the inner diameter of the outer cavity 901. The piston 902 and the other three side walls of the outer cavity 901 form a closed space together, so that the water in the outer cavity 901 does not flow out. A piston rod 903 is fixedly provided at the outer end of the piston 902. A piercing nail 904 capable of piercing the solution bag 10 is connected to the end of the piston rod 903. The nail tip of the piercing nail 904 extends into the reaction chamber 4 and abuts against the side wall of the solution bag 10.

[0040] When the temperature is above the freezing point of water, the puncturing nail 904 will only lightly contact the solution bag 10 and will not puncture the solution bag 10; when the temperature drops to the freezing point of water, the water in the outer cavity 901 begins to freeze and the volume increases. Because the outer cavity 901 is made of stainless steel, it is difficult to deform. Therefore, the ice cube with increased volume can only push the piston 902, so that the piston 902 and the piston rod 903 move toward the direction of the solution bag 10. Finally, the puncturing nail 904 punctures the solution bag 10, so that the two solutions are mixed, and an endothermic reaction is generated to cool the deformable tube 1, so that the water inside it freezes and expands, thereby breaking the side wall of the deformable tube 1, and the water in the water supply pipe is discharged from the rupture of the deformable tube 1, thereby achieving the purpose of protecting the heat pump unit.

[0041] It should be noted that when the air temperature drops to the freezing point of water, the water in the deformation puncturing mechanism 9, the connecting tube 3 and the cavity 5 of the deformation tube 1 will begin to freeze. It takes a certain period of heat dissipation for the water to freeze. At the freezing point of water, the water is in a state of an ice-water mixture, and the volume of the water does not change much at this time. In a confined space, the speed at which water freezes is related to the ambient temperature, the salt content in the water, the flow rate of the water and the heat dissipation area per unit volume of water. The larger the heat dissipation area per unit volume of water, the faster the water freezes. Because the outer cavity 901 of the deformation puncturing mechanism 9 for storing water is an elongated cylindrical tubular structure, the unit heat dissipation area of ​​the water therein is much larger than the unit heat dissipation area of ​​the water in the hot water pipe. Therefore, the freezing speed of the water in the outer cavity 901 will be much faster than that of the water in the hot water pipe. Before the water in the hot water pipe is completely frozen, the outer cavity 901 will freeze faster than the water in the hot water pipe. When the water in the deformation puncture mechanism 9 is frozen and destroys the hot water supply pipe, the water in the deformation puncture mechanism 9 has been completely frozen, and because the volume of the water increases after freezing, the piston 902 is pushed, so that the piston 902 and the piston rod 903 move toward the direction of the solution bag 10, and finally the puncture nail 904 punctures the solution bag 10, so that the ammonium chloride solution and the barium hydroxide solution are mixed, and an endothermic reaction is generated to cool the deformable tube 1, so that the water inside it freezes and expands, thereby breaking the side wall of the deformable tube 1, and the water in the water supply pipe is discharged from the rupture of the deformable tube 1, so as to achieve the purpose of protecting the heat pump unit; it is necessary to complete the design of the size of the outer cavity 901 of the deformation puncture mechanism 9 according to experimental tests, so that the volume of the water inside it and the heat dissipation area are appropriate, and the freezing time is sufficiently separated from the freezing time of the water in the hot water supply pipe, so as to achieve the effect of timely puncturing the solution bag 10 and protecting the hot water supply pipe.

[0042] Furthermore, a plurality of deformation puncturing mechanisms 9 are provided, which are arranged around the center of the reaction chamber 4 at intervals in the upper half of the reaction chamber 4, so as to ensure that when the temperature reaches the freezing point of water, at least one deformation puncturing mechanism 9 can fully deform and puncture the solution bag 10 in time, so that the ammonium chloride solution and the barium hydroxide solution are mixed, thereby achieving the effect of cooling the deformable tube 1 to cause it to rupture and drain water, thereby increasing the probability of the solution bag 10 being punctured.

[0043] It should be noted that when the heat pump unit is operating normally in winter, because the heat pump unit is in heating mode at this time, the water temperature inside the hot water pipe is usually around 40 degrees Celsius. Although the external ambient temperature is low, the reaction tube 2 and the deformation tube 1 can absorb heat from the hot water pipe to maintain their own temperature above the freezing point of water. Therefore, the mechanism for isolating the ammonium chloride solution and the barium hydroxide solution in the reaction chamber 4 will not be triggered, the two will not react, the deformation tube 1 will not freeze, and the antifreeze device can remain effective.

[0044] If a power outage occurs in the user's home, the heat pump unit shuts down, the heating mode stops, and the temperature of the circulating water inside the hot water pipe gradually decreases, making it impossible to continue to provide heat to the reaction tube 2 and the deformable tube 1. If the ambient temperature at this time continues to be below the freezing point of water, the mechanism for isolating the ammonium chloride solution and the barium hydroxide solution in the reaction chamber 4 will eventually be triggered. The contact between the two will produce an endothermic reaction, which will eventually freeze the water in the deformable tube 1, causing the deformable tube 1 to rupture and achieve drainage.

[0045] In addition, when the ambient temperature rises, although the heat pump unit does not work, the ambient temperature is higher than the freezing point of water, so the mechanism for isolating the ammonium chloride solution and the barium hydroxide solution in the reaction chamber 4 will not be triggered, the two will not react, the deformation tube 1 will not freeze, and the antifreeze device can remain effective.

[0046] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A deformation type heat pump unit antifreeze device, characterized in that: The invention comprises a deformation tube (1), wherein reaction tubes (2) are fixedly arranged at both left and right ends of the deformation tube (1), the side walls of the reaction tubes (2) are closely attached to the side walls of the deformation tube (1), and the contact surfaces of the reaction tubes (2) and the deformation tube (1) are both made of heat-conducting materials; connecting tubes (3) are fixedly arranged at the outer sides of the two reaction tubes (2), the connecting tubes (3), the reaction tubes (2) and the interiors of the deformation tubes (1) are sequentially connected to form a channel for hot water to pass through, and the connecting tubes (3) are connected to the hot water supply pipe; an annular reaction chamber (4) is arranged in the reaction tube (2), and a filler capable of generating an endothermic reaction is stored in the reaction chamber (4); an annular cavity (5) is arranged in the deformation tube (1), and the cavity (5) is filled with an appropriate amount of water.

2. A deformation type heat pump unit antifreeze device as claimed in claim 1, characterized in that: An annular plate (6) is provided in the reaction chamber (4), the annular plate (6) divides the reaction chamber (4) into two annular parts, an inner and an outer annular part, the inner and outer annular parts are respectively filled with different reactants, a through hole (7) is provided on the annular plate (6), an air bag (8) is blocked in the through hole (7), and the air bag (8) is filled with air.

3. A deformation type heat pump unit antifreeze device as claimed in claim 2, characterized in that: The airbag (8) is made of an anti-corrosion material and has an elliptical shape. The major axis of the ellipse is parallel to the thickness direction of the annular plate (6), and the side of the airbag (8) is in contact with the side wall of the through hole (7).

4. A deformation type heat pump unit antifreeze device as claimed in claim 2, characterized in that: A plurality of through holes (7) are provided, which are arranged on the annular plate (6) at intervals and around the center of the annular plate (6), and each through hole (7) is blocked with an air bag (8).

5. The antifreeze device of a deformation type heat pump unit according to claim 1, characterized in that: A solution bag (10) is arranged in the reaction chamber (4), the solution bag (10) is semi-annular and fixedly arranged in the upper half of the reaction chamber (4), and the reaction chamber (4) and the solution bag (10) are respectively filled with different reactants; a deformation puncturing mechanism (9) is arranged on the side of the solution bag (10), and the deformation puncturing mechanism (9) comprises an outer cavity (901) fixedly arranged on the side of the reaction tube (2), the outer cavity (901) is an elongated cylindrical tubular structure with one end open, and the outer cavity (901) is a cylindrical structure with one end open. 1) is provided with a piston (902) for blocking the opening, the outer diameter of the piston (902) is adapted to the inner diameter of the outer chamber (901), and the outer chamber (901) is filled with water; a piston rod (903) is fixedly provided at the outer end of the piston (902), the end of the piston rod (903) is connected with a piercing nail (904) capable of piercing the solution bag (10), the nail tip of the piercing nail (904) extends into the reaction chamber (4) and abuts against the side wall of the solution bag (10).

6. A deformation type heat pump unit antifreeze device as claimed in claim 5, characterized in that: A plurality of the deformation puncturing mechanisms (9) are provided, which are arranged around the center of the reaction chamber (4) at intervals in the upper half of the reaction chamber (4).

7. The antifreeze device of a deformation type heat pump unit according to claim 5, characterized in that: The solution bag (10) is a thin-walled bag made of an anti-corrosion rubber material.

8. The antifreeze device of a deformation type heat pump unit according to claim 1, characterized in that: The inner and outer sides of the deformable tube (1) are fixedly provided with puncture needles (11), and the puncture needles (11) are attached to the side walls of the deformable tube (1).

9. The antifreeze device of a deformation type heat pump unit according to claim 1, characterized in that: The fillers in the reaction chamber (4) are ammonium chloride solution and barium hydroxide solution.

10. A deformation type heat pump unit antifreeze device according to any one of claims 1 to 9, characterized in that: A heat dissipation ring (12) is fixedly arranged on the outside of the deformation tube (1), a gap for liquid to pass through is left between two adjacent heat dissipation rings (12), and a heat dissipation fin (13) is fixedly connected to the outside of the heat dissipation ring (12).

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