CN216769848U - Air source heat pump hot water heat accumulation defrost system based on double-pipe heat exchanger - Google Patents
Air source heat pump hot water heat accumulation defrost system based on double-pipe heat exchanger Download PDFInfo
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- CN216769848U CN216769848U CN202123205650.4U CN202123205650U CN216769848U CN 216769848 U CN216769848 U CN 216769848U CN 202123205650 U CN202123205650 U CN 202123205650U CN 216769848 U CN216769848 U CN 216769848U
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Abstract
The utility model provides an air source heat pump hot water heat storage defrosting system based on a double-pipe heat exchanger, which comprises a heating water circulation module, a heat storage module, a refrigerant circulation module and a heat exchange module, wherein the heating water circulation module is connected with the heat storage module; the refrigerant circulation module is connected with the heat exchange module, the heating water circulation module is connected with the heat exchange module, and the refrigerant circulation module and the heating water circulation module perform heat transfer through the heat exchange module; the heat exchange module is arranged in the heat storage module, and the heat storage module is used for storing heat through the heat exchange module; the heat storage medium in the heat storage module comprises water. The utility model has the beneficial effects that: the utility model is designed with a plurality of heating and heat storage operation modes, the switching between different heating and heat storage modes is simple, and the reasonable distribution of the unit heating quantity under different operation environments can be realized, thereby ensuring the heat supply effect and the defrosting effect of the unit to be satisfied by users, and greatly improving the indoor comfort during the heating period.
Description
Technical Field
The utility model belongs to the technical field of heating ventilation air-conditioning air source heat pumps, and particularly relates to an air source heat pump hot water heat storage defrosting system based on a double-pipe heat exchanger.
Background
The air source heat pump water heater is widely applied in recent years due to the advantages of energy conservation, high efficiency, safety, reliability and the like. However, when the evaporator of the unit operates in a low-temperature and high-humidity environment (such as the middle and lower reaches of Yangtze river in China), the evaporator of the unit frosts, the air channel is blocked by frosting, the heat transfer resistance of the air side is increased, the heating capacity of the unit is greatly reduced, and the evaporator needs to be periodically defrosted. The existing reverse cycle defrosting technology needs to absorb heat from hot water at a user side or indoor air for defrosting during defrosting, which causes great drop of indoor temperature, seriously influences the indoor comfort at the user side, and also reduces the heating energy efficiency of a unit, so that a new defrosting technology needs to be developed to solve the problem.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention is directed to a heat storage and defrosting system for an air source heat pump based on a double pipe heat exchanger, so as to solve the problem of defrosting of the air source heat pump.
In order to achieve the purpose, the technical scheme of the utility model is realized as follows:
an air source heat pump hot water heat storage defrosting system based on a double-pipe heat exchanger comprises a heating water circulation module, a heat storage module, a refrigerant circulation module and a heat exchange module;
the refrigerant circulation module is connected with the heat exchange module, the heating water circulation module is connected with the heat exchange module, and the refrigerant circulation module and the heating water circulation module perform heat transfer through the heat exchange module;
the heat exchange module is arranged in the heat storage module, and the heat storage module is used for storing heat through the heat exchange module; the heat storage medium in the heat storage module comprises water.
Further, the heating water circulation module comprises a first water pipe, a second water pipe, a first water valve, a fifth water valve, a three-way valve and a water pump;
one end of the first water pipe is connected with the heat exchange module through a three-way valve, and the other end of the first water pipe is used for conveying heating water to a user;
heating return water passes through the second water pipe and the first water valve, is pressurized by the water pump, and is returned to the heat exchange module through the fifth water valve.
Further, the heat storage module comprises a shell, a partition plate is arranged in the shell, the partition plate divides an inner cavity of the shell into an upper cavity and a lower cavity, and heat storage media are filled in the upper cavity and the lower cavity;
the inner wall and the outer wall of the shell are provided with heat insulation material layers;
a conduction unit is arranged between the upper cavity and the lower cavity, and the heat storage medium is transmitted between the upper cavity and the lower cavity through the conduction unit.
Further, the conduction unit comprises a fourth water pipe, a fifth water pipe, a third water valve and a fourth water valve;
the fourth water pipe penetrates through the partition plate, and an opening at the upper end of the fourth water pipe is communicated with the upper cavity;
the middle part of the fourth water pipe is connected with a fourth water valve through a fifth water pipe, and one end of the fourth water valve, which is far away from the fifth water pipe, is communicated with the lower cavity;
the lower end of the fourth water pipe is connected with a water outlet of the water pump through a third water valve;
the conduction unit further comprises a third water pipe and a second water valve, one end of the third water pipe is communicated with the interior of the lower cavity, the other end of the third water pipe is communicated with a second water pipe located between the first water valve and the water pump, and the second water valve is arranged on a pipeline of the third water pipe.
Further, the heat exchange module comprises a double-pipe heat exchanger, the double-pipe heat exchanger comprises an inner pipe and an outer pipe, and an internal hollow part is arranged between the inner pipe and the outer pipe;
the heat storage medium is filled in the middle cavity part outside the double-pipe heat exchanger;
the upper part of the double-pipe heat exchanger is an inlet end, and the lower part of the double-pipe heat exchanger is an outlet end;
the water outlet of the inner pipe positioned at the inlet end is connected with the first water pipe through a three-way valve, the inlet end of the three-way valve is communicated with the water outlet of the inner pipe, the first water outlet of the three-way valve is communicated with the inlet of the first water pipe, and the second water outlet of the three-way valve is communicated with the heat storage medium positioned in the lower cavity;
heating backwater is input to an inner pipe water inlet positioned at the outlet end through a fifth water valve;
the refrigerant is input into the heat exchange module through an inlet of the internal hollow part positioned at the inlet end;
the refrigerant is returned to the refrigerant circulation module through an outlet of the hollow part inside the outlet end.
Further, the refrigerant circulation module comprises a compressor, a four-way valve, an air-cooled evaporator, a throttle valve and a gas-liquid separator;
the refrigerant conveyed back through the outlet of the hollow part in the heat exchange module is connected with the inlet end of the throttle valve through a pipeline;
the inlet of the air-cooled evaporator is communicated with the outlet of the throttle valve;
the refrigerant coming out of the outlet of the air-cooled evaporator is sucked by the suction port of the compressor after passing through the four-way valve and the gas-liquid separator;
the refrigerant output by the compressor is transmitted to the heat exchange module through the inlet of the hollow part inside the compressor by the four-way valve.
Compared with the prior art, the air source heat pump hot water heat storage defrosting system based on the double-pipe heat exchanger has the following beneficial effects:
(1) the technical scheme provided by the utility model is based on the characteristic that the outside of the sleeve heat exchanger is hollow, hot water is filled in the hollow part to be used for storing redundant heat when the system is heated normally, and the hot water enters the sleeve heat exchanger during defrosting and carries out forced convection heat exchange with a refrigerant;
(2) the utility model is designed with a plurality of heating and heat storage operation modes, the switching between different modes is simple, the reasonable distribution of the unit heating quantity under different operation environments can be realized, the heat supply effect and the defrosting effect of the unit can be ensured to satisfy users, and the indoor comfort during the heating period is greatly improved.
(3) In the defrosting process of the system, the sleeve heat exchanger serves as an evaporator, the low-temperature refrigerant in the pipe gap can be forced to carry out heat convection with the heat storage hot water flowing in the inner pipe, and can carry out disturbance heat exchange with the heat storage hot water (because continuous water flows into and flows out of the heat storage hot water, disturbance can be generated on the heat storage hot water), so that the heat exchange effect of the heat exchanger is greatly enhanced, compared with the existing hot water and especially phase change heat storage defrosting technology (the heat exchange of the refrigerant and the phase change material is mainly heat conduction of the phase change material), the defrosting time can be greatly shortened, meanwhile, heat absorption from the indoor space during defrosting can be avoided, and the indoor comfort is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a schematic diagram of a system according to a first embodiment of the present invention;
fig. 2 is a schematic diagram of a heating water circulation module and a heat storage module according to a first embodiment of the present invention;
fig. 3 is a schematic diagram of a heating water circulation module and a heat storage module according to a second embodiment of the present invention.
Description of reference numerals: 1-a compressor; 2-a four-way valve; 3-air cooling evaporator; 4-a throttle valve; 5-a gas-liquid separator; 6-double pipe heat exchanger; 61-a housing; 62-three-way valve; 7-a water pump; 8-a first water pipe; 9-a second water pipe; 10-a third water pipe; 11-a first water valve; 12-a second water valve; 13-a third water valve; 14-a fourth water pipe; 15-a fourth water valve; 16-a fifth water pipe; 17-a fifth water valve; 18-partition plate.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
An air source heat pump hot water heat storage defrosting system based on a sleeve heat exchanger comprises a compressor 1, a four-way valve 2, an air cooling evaporator 3, a throttle valve 4 and a gas-liquid separator 5 and is characterized by further comprising a sleeve heat exchanger 6, a shell 61, a three-way valve 62, a water pump 7, a first water pipe 8, a second water pipe 9, a third water pipe 10, a first water valve 11 and a second water valve 12, wherein the sleeve heat exchanger 6 consists of an inner pipe and an outer pipe, water flows through the inner pipe, a refrigerant flows through a gap between the inner pipe and the outer pipe, a hot water inlet end and a refrigerant inlet end are arranged at the inlet end of the sleeve heat exchanger 6, a hot water outlet end and a refrigerant outlet end are arranged at the outlet end of the sleeve heat exchanger 6, hot water is filled in a middle cavity part outside the sleeve heat exchanger, the shell 61 only wraps and seals the sleeve heat exchanger 6 inside, and the sleeve heat exchanger 6 and the hot water are isolated from the outside, the shell 61 is internally provided with a heat insulating material, an inlet of the three-way valve 62 is communicated with a hot water outlet end, a first outlet of the three-way valve 62 is communicated with an inlet of a first water pipe 8, a second outlet of the three-way valve 62 is communicated with hot water, an outlet of the first water pipe 8 is communicated with a heat exchanger in a heating room, a hot water inlet end is communicated with an inlet of a second water pipe 9, an outlet of the second water pipe 9 is communicated with the heat exchanger in the heating room, the second water pipe 9 is provided with a water pump 7, a first water valve 11 is arranged on a pipeline between a water inlet of the water pump 7 and an outlet of the second water pipe 9, an inlet of the third water pipe 10 is communicated with the hot water in the shell 61, an outlet of the third water pipe 10 is communicated with a water inlet of the water pump 7, the third water pipe 10 is provided with a second water valve 12, an inlet end of the double-pipe heat exchanger 6 is communicated with a second port of the four-way valve 2, the first port of the four-way valve 2 is communicated with an exhaust port of the compressor 1, the third port of the four-way valve 2 is communicated with an inlet of the gas-liquid separator 5, an outlet of the gas-liquid separator 5 is communicated with an air suction port of the compressor 1, the fourth port of the four-way valve 2 is communicated with an outlet of the air-cooled evaporator 3, an inlet of the air-cooled evaporator 3 is communicated with an outlet of the throttle valve 4, and an inlet of the throttle valve 4 is communicated with a refrigerant outlet end of the double-pipe heat exchanger 6.
The system also comprises a partition plate 18, a fourth water pipe 14, a fifth water pipe 16, a third water valve 13, a fourth water valve 15 and a fifth water valve 17, wherein the partition plate 18 is positioned at the upper part of the double-pipe heat exchanger 6 and is in contact with the double-pipe heat exchanger 6, the partition plate 18 divides the shell 61 into an upper closed space and a lower closed space, the upper space is filled with hot water, the lower space is filled with hot water and submerges the double-pipe heat exchanger 6, the inlet of the fourth water pipe 14 is communicated with the water outlet of the water pump 7, the fourth water pipe 14 penetrates through the partition plate and the outlet of the fourth water pipe is communicated with the hot water in the upper space, the third water valve 13 is arranged on the fourth water pipe 14, the fifth water pipe 16 is positioned in the lower space of the shell 61, the inlet of the fifth water pipe 16 is communicated with a pipeline between the third water valve 13 and the outlet of the fourth water pipe 14, the outlet of the fifth water pipe 16 is communicated with the hot water in the lower space of the shell 61, the fourth water valve 15 is positioned on the fifth water pipe 16, and the fifth water valve 17 is positioned on the pipeline of the second water pipe 9 between the outlet of the water pump 7 and the hot water inlet end of the double-pipe heat exchanger 6.
The height of the upper half space of the housing 61 is about 20% of the lower half space.
About 20% of the area of the outer surface of the double pipe heat exchanger 6 is wound with a thermal insulation material.
Example one
As shown in fig. 1 and fig. 2, the technical solution of the present embodiment is as follows:
the working principle of the embodiment is as follows:
when the system operates in a heating and heat storage mode, the first water valve 11 is opened, the second water valve 12 is closed, the first outlet of the three-way valve 62 is opened, and the second outlet is closed.
Refrigerant circulation: high-temperature and high-pressure gas refrigerant coming out of a compressor 1 enters a gap between an inner pipe and an outer pipe in a double-pipe heat exchanger 6 through a four-way valve 2, flows from top to bottom, performs forced convection heat exchange with heating backwater in a countercurrent mode, transfers heat to the heating backwater through the pipe wall of the inner pipe, and simultaneously transfers heat to low-temperature heat storage hot water around the double-pipe heat exchanger 6 through the pipe wall of the outer pipe, so that the high-temperature refrigerant is cooled, condensed and supercooled, the refrigerant coming out of the double-pipe heat exchanger 6 is throttled by a throttle valve 4 and then becomes low-temperature and low-pressure liquid, then enters an air-cooled evaporator 3 to absorb heat evaporation and overheating of outdoor air, the surface of the evaporator slowly frosts, and low-temperature and low-pressure superheated gas coming out of the air-cooled evaporator 3 is sucked by an air suction port of the compressor 1 after passing through the four-way valve 2 and a gas-liquid separator 5.
And (3) heating water circulation: the heating water from the heating room is pressurized by the first water valve 11 and the water pump 7, then flows into the double pipe condenser 6 from bottom to top, and the heating water heated by the refrigerant enters the heating room through the first water pipe 8 to transfer heat to the indoor air, thereby realizing the heating of the room.
Heat storage hot water circulation: the heat-accumulating hot water absorbs the heat of the refrigerant in the double-pipe heat exchanger 6 in a heat conduction mode, and then the temperature of the refrigerant gradually rises.
When the system detects that the air-cooled evaporator 3 needs defrosting, firstly, whether the temperature of the heat storage hot water reaches a set value (the set value can be determined according to actual conditions, as long as the water temperature can provide sufficient heat for defrosting of the system, if the set value is 50 ℃), and if the temperature reaches the set value, the system enters a defrosting mode; if the set value is not reached, the quick heat storage mode of the heat storage hot water is operated, and the working principle of the mode is as follows:
the first water valve 11 is closed, the second water valve 12 is opened, the first outlet of the three-way valve 62 is closed, the second outlet is opened, the mode is composed of a refrigerant cycle, a heating water cycle and a heat storage hot water cycle, wherein the refrigerant cycle process is the same as that of the heating and heat storage mode, but the heating water cycle and the heat storage hot water cycle are greatly different, the heating water cycle stops in the mode, and the working principle of the heat storage hot water cycle is as follows: the heat-storage hot water passes through the second water valve 12, is pressurized by the water pump 7, then enters the double-pipe heat exchanger 6, flows from bottom to top, exchanges heat with the refrigerant in a forced convection mode, gradually increases the temperature, and then returns to the heat-storage hot water through the second outlet of the three-way valve 62. In the process, the heat generated by the system is all used for heating the heat storage hot water, so the temperature of the heat storage hot water can reach the set value within a short time (such as 1min), and the temperature in a heating room cannot be reduced due to short heat supply stopping time. When the temperature of the heat storage hot water reaches a set value, the system stops running the mode and enters a defrosting mode.
When the system operates in a defrosting mode, the four-way valve 2 is reversed, the first water valve 11 is closed, the second water valve 12 is opened, the first outlet of the three-way valve 62 is closed, the second outlet is opened, the defrosting mode comprises a refrigerant cycle, a heating water cycle and a heat storage hot water cycle, and the working principle of each part of the cycle is as follows.
Refrigerant circulation: high-temperature and high-pressure gas refrigerant from a compressor 1 enters through a four-way valve 2, the air-cooled evaporator 3 transfers heat to frost on the surface of the evaporator to melt the frost, the refrigerant from the air-cooled evaporator 3 is throttled by a throttle valve 4 and then changed into low-temperature and low-pressure liquid, the low-temperature and low-pressure liquid enters a gap between an inner pipe and an outer pipe of a sleeve heat exchanger 6 and flows from bottom to top to perform forced convection heat exchange with flowing heat storage hot water inside the inner pipe and also performs heat exchange with heat storage hot water on the outer surface of the sleeve in a heat conduction mode, and the refrigerant absorbs the heat of the two parts of heat storage hot water, evaporates into superheated gas, and then is sucked into an air suction port of the compressor 1 through the four-way valve 2 and a gas-liquid separator 5.
And (3) heating water circulation: in this mode, the heating water circulation is stopped and the system stops supplying heat to the heating room.
Heat storage hot water circulation: the heat-storage hot water passes through the second water valve 12, is pressurized by the water pump 7, then enters the double-pipe heat exchanger 6, flows from bottom to top, exchanges heat with the refrigerant in a forced convection mode, gradually reduces the temperature, and then returns to the heat-storage hot water through the second outlet of the three-way valve 62. When the defrosting of the system is finished, the system stops running the mode and enters a heating and heat storage mode.
The shell 61 is internally provided with a heat insulation material with extremely low heat conduction coefficient, so that heat dissipation of heat storage hot water to surrounding cold air can be effectively reduced, and the heat insulation material can be heat insulation cotton or polyurethane heat insulation material commonly used in the field.
The beneficial effect of this embodiment is:
(1) in the system heating heat accumulation in-process, the double pipe heat exchanger is as the condenser, the high temperature refrigerant in inner tube and outer tube clearance is for forcing the convection heat transfer with the heating water in the inner tube, the heat transfer mode with the heat accumulation hot water on heat exchanger surface is mainly heat conduction and the coefficient of heat conductivity of water is less, compare with forcing the convection heat transfer mode, the heat transfer effect of this mode is relatively poor, so the heating water has all been passed to most heat of refrigerant, and in order to guarantee the sufficient of heat accumulation volume, the system still is equipped with the quick heat accumulation mode of heat accumulation hot water, can realize utilizing double pipe heat exchanger to reach priority heating like this, waste heat accumulation can guarantee the purpose that the heat accumulation volume is sufficient.
(2) In the defrosting process of the system, the sleeve heat exchanger is used as an evaporator, and the low-temperature refrigerant in the gap between the inner pipe and the outer pipe can perform forced convection heat exchange with the heat storage hot water flowing in the inner pipe and can perform disturbance heat exchange with the heat storage hot water on the surface of the sleeve heat exchanger. Because there is continuous water to flow in and out the hot water of heat accumulation, can produce the disturbance to heat accumulation hot water to strengthened the hot water's of heat accumulation heat transfer effect, can improve the evaporating temperature of refrigerant like this by a wide margin, thereby shorten the defrosting time, can avoid simultaneously from indoor heat absorption during the defrosting, guaranteed indoor travelling comfort.
(3) The embodiment is based on the characteristic that the heat exchanger is hollow outside, hot water for heat storage is filled in the hollow part, no additional water pump is needed, and only a plurality of valves and water pipelines are added, so that the occupied space and the cost of the unit can be reduced to the maximum extent.
(4) Most condensers for small and medium-sized air source heat pump water heaters in the existing market are double-pipe heat exchangers, and the system needs to perform defrosting operation during heating in winter, and the advantages of the embodiment are combined, so that the embodiment has a very wide market application prospect, and related products are under development.
Example two
As shown in fig. 3, the technical solution of the present embodiment is different from embodiment 1 in that the system heating and heat storage mode further includes a heat storage hot water slow heat storage cycle, and the operating principle of the cycle is as follows: in the process of the heating and heat storage mode of the system, when the temperature of the heating water coming out of the double-pipe heat exchanger 6 is detected to be lower than a set value, the system runs heat storage hot water slow heat storage circulation, the first water valve 11, the fourth water valve 15 and the fifth water valve 17 are closed, the second water valve 12 and the third water valve 13 are opened, the heating water circulation is stopped, the heat storage hot water is pressurized by the water pump 7 through the second water valve 12 and then enters the upper half space of the shell 61 through the third water valve 13, the process runs for t seconds (the value of t is small, the reason is given below), namely after most of the upper half space is filled with hot water, the first water valve 11 and the fifth water valve 17 are opened, the second water valve 12, the third water valve 13 and the fourth water valve 15 are closed, namely the circulation of the heating water is recovered, and the part of the heat storage hot water in the lower half space can be transferred to the upper half space through the process, therefore, the contact area of the surface of the double-pipe heat exchanger 6 and the heat storage hot water is reduced, so that the heat transfer quantity of the refrigerant to the heat storage hot water is reduced, and more heat is transferred to the heating water in the inner pipe.
In the process, because the water in the inner pipe of the double-pipe heat exchanger 6 does not flow, the heat exchange effect of the refrigerant and the water is poor, the condensation temperature and the pressure of the refrigerant are not high well due to the condensation of the refrigerant in the time period, the system is stopped due to the over-pressure self-protection phenomenon, the circulating flow of the refrigerant is reduced by reducing the opening of the throttle valve, and the stable and safe operation of the unit is ensured by reducing the condensation pressure of the refrigerant. If the fans for the compressor 1 and the air-cooled evaporator 3 are variable frequency motors, a similar effect can be achieved by reducing the frequency of the motors.
The reason why the value of the time t is small is given here: the water pump 7 used in this embodiment is mainly for driving the circulation of the heating water, the circulation flow rate of the heating water is much larger than the flow rate of the thermal storage hot water circulation, and the volume of the upper half space is smaller by about 20% of the lower half space, so the water pump 7 can fill the upper half space with the hot water in a short time.
When the temperature of the heating water discharged from the double-pipe heat exchanger 6 is higher than a set value, the fourth water valve 15 is opened, and the hot water in the upper half space sequentially passes through the fourth water pipe 14 and the fifth water pipe 16 under the action of gravity to enter the lower half space and be heated.
Compared with the first embodiment, the present embodiment has the following beneficial effects:
in the embodiment, on the basis of the first heating and heat storage mode, the slow heat storage circulation of the heat storage hot water is added, so that the system can transmit more heat of the high-temperature refrigerant to the heating water by operating the slow heat storage circulation of the heat storage hot water if the outlet water temperature of the double-pipe heat exchanger 6 is detected to be lower than a set value during the operation of the heating and heat storage mode, and the purpose of preferentially heating is achieved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. The utility model provides an air source heat pump hot water heat accumulation defrost system based on double-pipe heat exchanger which characterized in that: the system comprises a heating water circulation module, a heat storage module, a refrigerant circulation module and a heat exchange module;
the refrigerant circulation module is connected with the heat exchange module, the heating water circulation module is connected with the heat exchange module, and the refrigerant circulation module and the heating water circulation module perform heat transfer through the heat exchange module;
the heat exchange module is arranged in the heat storage module, and the heat storage module is used for storing heat through the heat exchange module;
the heat storage medium in the heat storage module comprises water;
the heat storage module comprises a shell (61), a partition plate (18) is further arranged in the shell (61), the partition plate (18) divides an inner cavity of the shell (61) into an upper cavity and a lower cavity, and heat storage media are filled in the upper cavity and the lower cavity;
a heat insulation material layer is arranged between the inner wall and the outer wall of the shell (61);
a conduction unit is arranged between the upper cavity and the lower cavity, and the heat storage medium is transferred between the upper cavity and the lower cavity through the conduction unit.
2. The air source heat pump hot water heat storage defrosting system based on the double-pipe heat exchanger as claimed in claim 1, characterized in that: the heating water circulation module comprises a first water pipe (8), a second water pipe (9), a first water valve (11), a fifth water valve (17), a three-way valve (62) and a water pump (7);
one end of the first water pipe (8) is connected with the heat exchange module through a three-way valve (62), and the other end of the first water pipe is used for conveying heating water for users;
heating return water passes through the second water pipe (9) and the first water valve (11), is pressurized by the water pump (7), and is returned to the heat exchange module through the fifth water valve (17).
3. The air source heat pump hot water heat storage defrosting system based on the double-pipe heat exchanger as claimed in claim 1, characterized in that: the conduction unit comprises a fourth water pipe (14), a fifth water pipe (16), a third water valve (13) and a fourth water valve (15);
the fourth water pipe (14) penetrates through the partition plate (18), and an opening at the upper end of the fourth water pipe (14) is communicated with the upper cavity;
the middle part of the fourth water pipe (14) is connected with a fourth water valve (15) through a fifth water pipe (16), and one end, far away from the fifth water pipe (16), of the fourth water valve (15) is communicated with the lower cavity;
the lower end of the fourth water pipe (14) is connected with the water outlet of the water pump (7) through a third water valve (13);
the conduction unit further comprises a third water pipe (10) and a second water valve (12), one end of the third water pipe (10) is communicated with the interior of the lower cavity, the other end of the third water pipe is communicated with a second water pipe (9) located between the first water valve (11) and the water pump (7), and the second water valve (12) is arranged on a pipeline of the third water pipe (10).
4. The air source heat pump hot water heat storage defrosting system based on the double-pipe heat exchanger as claimed in claim 1, characterized in that: the heat exchange module comprises a double-pipe heat exchanger (6), the double-pipe heat exchanger (6) comprises an inner pipe and an outer pipe, and an internal hollow part is arranged between the inner pipe and the outer pipe;
a heat storage medium is filled in the middle cavity part outside the double-pipe heat exchanger (6);
the upper part of the double-pipe heat exchanger (6) is an inlet end, and the lower part thereof is an outlet end;
the water outlet of the inner pipe positioned at the inlet end is connected with the first water pipe (8) through a three-way valve (62), the inlet end of the three-way valve (62) is communicated with the water outlet of the inner pipe, the first water outlet of the three-way valve (62) is communicated with the inlet of the first water pipe (8), and the second water outlet of the three-way valve (62) is communicated with the heat storage medium positioned in the lower cavity;
heating backwater is input to an inner pipe water inlet positioned at the outlet end through a fifth water valve (17);
the refrigerant is input into the heat exchange module through the hollow inner part inlet at the inlet end;
the refrigerant is returned to the refrigerant circulation module through an outlet of the hollow part in the outlet end.
5. The air source heat pump hot water heat storage defrosting system based on the double-pipe heat exchanger as claimed in claim 1, characterized in that: the refrigerant circulating module comprises a compressor (1), a four-way valve (2), an air-cooled evaporator (3), a throttle valve (4) and a gas-liquid separator (5);
the refrigerant conveyed back through the outlet of the hollow part in the heat exchange module is connected with the inlet end of the throttle valve (4) through a pipeline;
the inlet of the air-cooled evaporator (3) is communicated with the outlet of the throttle valve (4);
the refrigerant coming out of the outlet of the air-cooled evaporator (3) passes through the four-way valve (2) and the gas-liquid separator (5) and then is sucked by the suction port of the compressor (1);
the refrigerant output by the compressor (1) is transmitted to the heat exchange module through the four-way valve (2) and the inlet of the hollow part inside.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123205650.4U CN216769848U (en) | 2021-12-17 | 2021-12-17 | Air source heat pump hot water heat accumulation defrost system based on double-pipe heat exchanger |
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| CN202123205650.4U CN216769848U (en) | 2021-12-17 | 2021-12-17 | Air source heat pump hot water heat accumulation defrost system based on double-pipe heat exchanger |
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| CN202123205650.4U Active CN216769848U (en) | 2021-12-17 | 2021-12-17 | Air source heat pump hot water heat accumulation defrost system based on double-pipe heat exchanger |
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| CN (1) | CN216769848U (en) |
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2021
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