CN216924608U - Direct expansion type phase change energy storage heat pump system - Google Patents
Direct expansion type phase change energy storage heat pump system Download PDFInfo
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- CN216924608U CN216924608U CN202220172000.XU CN202220172000U CN216924608U CN 216924608 U CN216924608 U CN 216924608U CN 202220172000 U CN202220172000 U CN 202220172000U CN 216924608 U CN216924608 U CN 216924608U
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- 239000007788 liquid Substances 0.000 claims description 52
- 239000012782 phase change material Substances 0.000 claims description 42
- 238000005338 heat storage Methods 0.000 claims description 8
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- 239000007787 solid Substances 0.000 description 5
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/14—Thermal energy storage
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Abstract
The utility model relates to a direct expansion type phase change energy storage heat pump system, which comprises an indoor unit, an outdoor unit and a water tank, wherein the indoor unit comprises an indoor unit shell, a fan section is arranged above the interior of the indoor unit shell, a return air section is arranged below the interior of the indoor unit shell, the upper part of the side surface of the indoor unit shell is provided with an air supply outlet communicated with the fan section, and the lower part of the side surface of the indoor unit shell is provided with a return air inlet communicated with the return air section; the middle part of the indoor unit shell is provided with a first heat exchange channel and a second heat exchange channel, the upper end of the first heat exchange channel is communicated with the fan section, and the lower end of the first heat exchange channel is communicated with the return air section; the upper end of the second heat exchange channel is communicated with the fan section, and the lower end of the second heat exchange channel is communicated with the air return section; an indoor air-cooled heat exchanger is arranged in the first heat exchange channel, and a phase change energy storage and cold accumulation device is arranged in the second heat exchange channel; and a phase change energy storage and heat accumulation device is arranged in the water tank. The waste heat of the vapor compression refrigeration cycle is recycled to prepare hot water, and the method has remarkable effects of improving the energy utilization rate, reducing the operating cost and relieving the pressure of a power grid.
Description
Technical Field
The utility model relates to the technical field of heat pumps and phase change energy storage, in particular to a direct expansion type phase change energy storage heat pump system.
Background
With the development of economy and the improvement of the living standard of people, air conditioners and water heaters become necessities of most of the families in China increasingly. However, the problem of high energy consumption of air conditioners and hot water puts a great pressure on energy supply in China. The air source heat pump water heater heats water by absorbing heat in air, and the electricity consumption for heating the same hot water is only about 1/4 of that of an electric water heater, so that the air source heat pump water heater is widely concerned and applied due to high energy efficiency. The air conditioner rejects heat to the environment during the vapor compression refrigeration cycle, and the air source heat pump water heater absorbs heat from the environment during the vapor compression heating cycle, which wastes energy.
The phase change energy storage technology based on the phase change material has the advantages of large energy storage density, small temperature change in the energy storage process and the like, and can effectively solve the problem of mismatching of energy supply and demand in time and use strength. The phase-change material is combined with an air conditioner or a heat pump system, the cold energy is stored in the phase-change material at night, and is released in the daytime to cool the indoor environment, so that the peak load shifting of the electric power can be realized, and the cooling operation cost is reduced. How to realize the rapid energy storage of the phase-change material is the key of the application of the phase-change energy storage system.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a direct expansion type phase change energy storage heat pump system capable of increasing energy utilization rate and reducing operation cost.
The utility model is realized by adopting the following scheme: a direct expansion type phase change energy storage heat pump system comprises an indoor unit, an outdoor unit and a water tank which are connected through pipelines, wherein the indoor unit comprises an indoor unit shell, a fan section is arranged above the interior of the indoor unit shell, a return air section is arranged below the interior of the indoor unit shell, an air supply outlet communicated with the fan section is arranged at the upper part of the side surface of the indoor unit shell, and a return air inlet communicated with the return air section is arranged at the lower part of the side surface of the indoor unit shell; the middle part of the indoor unit shell is provided with a first heat exchange channel and a second heat exchange channel, the upper end of the first heat exchange channel is communicated with the fan section, and the lower end of the first heat exchange channel is communicated with the return air section; the upper end of the second heat exchange channel is communicated with the fan section, and the lower end of the second heat exchange channel is communicated with the air return section; an indoor air-cooled heat exchanger is arranged in the first heat exchange channel, and a phase change energy storage and cold accumulation device is arranged in the second heat exchange channel; and a phase change energy storage and heat accumulation device is arranged in the water tank.
Further, a first electric air valve used for controlling the opening and closing of the first heat exchange channel is arranged at the lower end of the first heat exchange channel; the lower end of the second heat exchange channel is provided with a second electric air valve used for controlling the opening and closing of the second heat exchange channel; the indoor air-cooled heat exchanger and the first electromagnetic valve are connected in series through a refrigerant pipeline, and then the indoor air-cooled heat exchanger and the first electromagnetic valve are connected in parallel with the phase-change energy-storage cold-storage device and the second electromagnetic valve through a refrigerant pipeline.
Furthermore, the outdoor unit comprises an outdoor casing provided with an air inlet and an air outlet, a compressor, a gas-liquid separator, a four-way reversing valve, a third electromagnetic valve, an outdoor air-cooled heat exchanger, a throttling device, a fourth electromagnetic valve, a fifth electromagnetic valve, a sixth electromagnetic valve, a seventh electromagnetic valve, an eighth electromagnetic valve and a condensing fan; the air suction port of the compressor is connected with the gas-liquid separator through a refrigerant pipeline, and the air exhaust port is connected with the four-way reversing valve through a refrigerant pipeline; one port of the four-way reversing valve is connected with the gas-liquid separator through a refrigerant pipeline, one port of the four-way reversing valve is connected with the outdoor air-cooled heat exchanger through the refrigerant pipeline and a third electromagnetic valve, and the other port of the four-way reversing valve is connected with one end of the indoor air-cooled heat exchanger through the refrigerant pipeline; one end of the throttling device is connected with the outdoor air-cooled heat exchanger through a fourth electromagnetic valve through a refrigerant pipeline, and the other end of the throttling device is connected with the indoor air-cooled heat exchanger through a first electromagnetic valve through the refrigerant pipeline; a pipeline formed by connecting the water tank and the fifth electromagnetic valve in series is connected with a pipeline formed by connecting the third electromagnetic valve, the outdoor air-cooled heat exchanger and the fourth electromagnetic valve in series in parallel; a pipeline in which the fourth electromagnetic valve and the throttling device are connected in series is connected with a pipeline in which the sixth electromagnetic valve is arranged in parallel; one end of the seventh electromagnetic valve is connected to a pipeline between the water tank and the fifth electromagnetic valve through a refrigerant pipeline, and the other end of the seventh electromagnetic valve is connected to a pipeline between the four-way reversing valve and the indoor air-cooled heat exchanger through a refrigerant pipeline; one end of the eighth electromagnetic valve is connected to a pipeline between the third electromagnetic valve and the outdoor air-cooled heat exchanger through a refrigerant pipeline, and the other end of the eighth electromagnetic valve is connected to a pipeline between the four-way reversing valve and the indoor air-cooled heat exchanger through a refrigerant pipeline.
Further, a first temperature sensor is arranged at the air return opening; a second temperature sensor is arranged at the air supply opening; and a third temperature sensor is arranged at the water outlet pipe of the water tank.
Furthermore, a water inlet pipe, a water outlet pipe and a water outlet pipe are arranged on the shell of the water tank, and the phase change energy storage and heat storage device is positioned in the water tank; the water inlet pipe is sequentially provided with a filter, a check valve and a first gate valve; and a second gate valve is arranged on the drain pipe.
Furthermore, the phase-change energy storage cold accumulation device and the phase-change energy storage heat accumulation device are composed of a plurality of phase-change energy storage modules which are parallel to each other, the phase-change energy storage modules are embedded in the metal plate by adopting phase-change materials, the refrigerant pipeline is coiled in a shape like a Chinese character 'hui' in the phase-change materials, a certain distance is reserved between the refrigerant pipeline and the phase-change energy storage modules, the external shape of the refrigerant pipeline is a light pipe or a cuboid with external fins, and a certain distance is reserved between the adjacent phase-change energy storage modules to form a channel.
Compared with the prior art, the utility model has the following beneficial effects:
(1) the operation under different working conditions can be accurately and quickly switched, the cold and heat storage of the night off-peak electricity price are utilized, the waste heat of the vapor compression refrigeration cycle is recovered to prepare hot water, the cold supply, the heat supply and the hot water supply of a building are met, and the system has obvious effects of improving the energy utilization rate, reducing the operation cost and relieving the pressure of a power grid;
(2) the refrigerant pipeline is directly embedded into the phase-change material, so that direct heat exchange between the refrigerant and the phase-change material is realized, the intermediate heat exchange link of the secondary refrigerant is reduced, meanwhile, the refrigerant pipeline is coiled in a shape like a Chinese character 'hui' in the phase-change material, the high-temperature refrigerant pipeline and the low-temperature refrigerant pipeline are arranged at intervals, the temperature between the phase-change materials is uniform, the heat exchange effect is good, and the energy storage efficiency can be improved.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to specific embodiments and accompanying drawings.
Drawings
FIG. 1 is a block diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a front view of a phase change energy storage module according to an embodiment of the utility model;
FIG. 3 is a schematic diagram of a top view of a phase change energy storage module according to an embodiment of the utility model;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
FIG. 5 is a flowchart illustrating a method for operating a system according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a system circuit according to an embodiment of the present invention;
the reference numbers in the figures illustrate: 1 is an indoor unit, 2 is an outdoor unit, 3 is a water tank, 4 is a controller, 5 is a fan section, 6 is a return air section, 7 is an air supply outlet, 8 is a return air inlet, 9 is a filter screen, 10 is a blower, 11 is a first heat exchange channel, 12 is a second heat exchange channel, 13 is an indoor air-cooled heat exchanger, 14 is a phase change energy storage cold accumulation device, 15 is a first electric air valve, 16 is a second electric air valve, 17 is a first electromagnetic valve, 18 is a second electromagnetic valve, 19 is a compressor, 20 is a gas-liquid separator, 21 is a four-way reversing valve, 22 is a third electromagnetic valve, 23 is an outdoor air-cooled heat exchanger, 24 is a throttling device, 25 is a fourth electromagnetic valve, 26 is a fifth electromagnetic valve, 27 is a sixth electromagnetic valve, 28 is a seventh electromagnetic valve, 29 is an eighth electromagnetic valve, 30 is an air inlet, 31 is an exhaust outlet, 32 is a condensing fan, 33 is a phase change energy storage device, 34 is a water inlet, 35 is a drain pipe, 36 is a drain pipe, 37 is a filter, 38 is a check valve, 39 is a first gate valve, 40 is a second gate valve, 141 is a refrigerant pipe, 142 is a phase change material, and 143 is a metal plate.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As shown in fig. 1 to 6, a direct expansion type phase change energy storage heat pump system comprises an indoor unit, an outdoor unit and a water tank which are connected through pipelines, wherein the indoor unit comprises an indoor unit shell, a fan section 5 is arranged above the indoor unit shell, a return air section 6 is arranged below the indoor unit shell, an air supply opening 7 communicated with the fan section 5 is arranged at the upper part of the side surface of the indoor unit shell, and a return air opening 8 communicated with the return air section 6 is arranged at the lower part of the side surface of the indoor unit shell; a first heat exchange channel 11 and a second heat exchange channel 12 are arranged in the middle of the indoor unit shell, the upper end of the first heat exchange channel 11 is communicated with the fan section, and the lower end of the first heat exchange channel is communicated with the air return section 6; the upper end of the second heat exchange channel 12 is communicated with the fan section 5, and the lower end is communicated with the air return section 6; an indoor air-cooled heat exchanger 13 is arranged in the first heat exchange channel 11, and a phase change energy storage and cold accumulation device 14 is arranged in the second heat exchange channel 12; a phase change energy storage and heat accumulation device is arranged in the water tank; the operation that can accurate switch different operating modes fast utilizes night low ebb electricity price cold storage and heat accumulation, retrieves steam compression refrigeration cycle's waste heat and prepares hot water, satisfies the confession cold, heating and the hot water supply of building, has apparent effect to improving energy utilization, reduce the working costs and alleviate electric wire netting pressure.
In this embodiment, the lower end of the first heat exchange channel 11 is provided with a first electric air valve 15 for controlling the opening and closing of the first heat exchange channel 11; the lower end of the second heat exchange channel 12 is provided with a second electric air valve 16 for controlling the opening and closing of the second heat exchange channel 12; the indoor air-cooled heat exchanger 13 and the first electromagnetic valve 17 are connected in series through a refrigerant pipeline, and then are connected in parallel with the phase change energy storage and cold accumulation device 14 and the second electromagnetic valve 18 through a refrigerant pipeline; the air feeder 10 introduces indoor air into the first heat exchange channel 11 sequentially through the air return opening 8, the filter screen 9, the air return section 6 and the first electric air valve 15, exchanges heat with a refrigerant of the indoor air-cooled heat exchanger 13, introduces the air subjected to heat exchange into a room sequentially through the fan section 5 and the air supply opening 7, or introduces the indoor air into the second heat exchange channel 12 sequentially through the air return opening 8, the filter screen 9, the air return section 6 and the second electric air valve 16, exchanges heat with the phase change material of the phase change energy storage cold accumulation module 14, and delivers the air subjected to heat exchange into the room sequentially through the fan section 5 and the air supply opening 7.
In this embodiment, the outdoor unit includes an outdoor unit casing having an air inlet 30 and an air outlet 31, a compressor 19, a gas-liquid separator 20, a four-way reversing valve 21, a third electromagnetic valve 22, an outdoor air-cooling heat exchanger 23, a throttling device 24, a fourth electromagnetic valve 25, a fifth electromagnetic valve 26, a sixth electromagnetic valve 27, a seventh electromagnetic valve 28, an eighth electromagnetic valve 29, and a condensing fan 32; the suction port of the compressor 19 is connected with the gas-liquid separator 20 through a refrigerant pipeline, and the exhaust port is connected with the four-way reversing valve 21 through a refrigerant pipeline; one port of the four-way reversing valve 21 is connected with the gas-liquid separator 20 through a refrigerant pipeline, one port of the four-way reversing valve is connected with an outdoor air-cooled heat exchanger 23 through a refrigerant pipeline and a third electromagnetic valve 22, and the other port of the four-way reversing valve is connected with one end of the indoor air-cooled heat exchanger 13 through the refrigerant pipeline; one end of the throttling device 24 is connected with the outdoor air-cooled heat exchanger 23 through a refrigerant pipeline by a fourth electromagnetic valve 25, and the other end of the throttling device is connected with the indoor air-cooled heat exchanger 13 through a refrigerant pipeline by a first electromagnetic valve 17; a pipeline formed by connecting the water tank 3 and the fifth electromagnetic valve 26 in series is connected in parallel with a pipeline formed by connecting the third electromagnetic valve 22, the outdoor air-cooled heat exchanger 23 and the fourth electromagnetic valve 25 in series; a pipeline formed by connecting the fourth electromagnetic valve 25 and the throttling device 24 in series is connected with a pipeline where the sixth electromagnetic valve 27 is located in parallel; one end of the seventh electromagnetic valve 28 is connected to a pipeline between the water tank 3 and the fifth electromagnetic valve 26 through a refrigerant pipeline, and the other end of the seventh electromagnetic valve is connected to a pipeline between the four-way reversing valve 21 and the indoor air-cooled heat exchanger 13 through a refrigerant pipeline; one end of the eighth electromagnetic valve 29 is connected to a pipeline between the third electromagnetic valve 22 and the outdoor air-cooled heat exchanger 23 through a refrigerant pipeline, and the other end of the eighth electromagnetic valve is connected to a pipeline between the four-way reversing valve 21 and the indoor air-cooled heat exchanger 13 through a refrigerant pipeline; the condensing fan 32 is located inside the outdoor unit 2, introduces outdoor air into the outdoor unit 2 through the air inlet 30, exchanges heat with the refrigerant in the outdoor air-cooled heat exchanger 23, and discharges the air after heat exchange to the outdoor environment through the air outlet 31.
In the present embodiment, the blower 10 employs a centrifugal fan; the condensing fan 32 is an axial flow fan.
In this embodiment, a first temperature sensor T1 is disposed at the air return opening 8; a second temperature sensor T2 is arranged at the air supply outlet 7; a third temperature sensor T3 is arranged at the water outlet pipe 36 of the water tank 3.
In the embodiment, a water inlet pipe 34, a water outlet pipe 35 and a water outlet pipe 36 are arranged on the casing of the water tank 3, and the phase change energy storage and heat storage device 33 is located in the water inside the water tank 3; the water inlet pipe 34 is sequentially provided with a filter 37, a check valve 38 and a first gate valve 39; the drain pipe 35 is provided with a second gate valve 40.
In this embodiment, the controller 4 is a single chip microcomputer, one end of the single chip microcomputer is connected with an alternating current live wire, and the other end of the single chip microcomputer is connected with an alternating current zero line; the blower 10, the compressor 19, the condensing fan 32, the first temperature sensor T1, the second temperature sensor T2, the third temperature sensor T3, the first electric air valve 15, the second electric air valve 16, the first electromagnetic valve 17, the second electromagnetic valve 18, the third electromagnetic valve 22, the fourth electromagnetic valve 25, the fifth electromagnetic valve 26, the sixth electromagnetic valve 27, the seventh electromagnetic valve 28, the eighth electromagnetic valve 29 and the four-way reversing valve 21 are all electrically connected with the controller 4.
In this embodiment, the phase-change energy storage cold accumulation device and the phase-change energy storage heat accumulation device are both composed of a plurality of phase-change energy storage modules which are parallel to each other, the phase-change energy storage modules are embedded in a metal plate by adopting a phase-change material, a refrigerant pipeline is coiled in a shape of a Chinese character hui in the phase-change material, a certain interval is reserved between the refrigerant pipeline and the phase-change material, the external shape of the refrigerant pipeline is a light pipe or a cuboid with external fins, and a certain interval is reserved between adjacent phase-change energy storage modules to form a channel; the phase-change material is inorganic hydrated salt, paraffin or an organic-inorganic composite phase-change material, and the phase-change temperature of the phase-change material of the phase-change energy-storage cold-storage device 14 is 7-12 ℃; the phase change temperature of the phase change material of the phase change energy storage and heat storage device 33 is 40-45 ℃; compared with the existing phase-change energy storage module, the phase-change energy storage cold accumulation device 14 and the phase-change energy storage heat accumulation device 33 directly blend the refrigerant pipeline into the phase-change material and the high and low temperature refrigerant pipelines are arranged at intervals, the refrigerant pipeline is directly embedded into the phase-change material, direct heat exchange between the refrigerant and the phase-change material is realized, the intermediate heat exchange link of the secondary refrigerant is reduced, meanwhile, the refrigerant pipeline is coiled in a shape of a Chinese character 'hui' inside the phase-change material, the high and low temperature refrigerant pipelines are arranged at intervals, the temperature between the phase-change materials is uniform, the heat exchange effect is good, and the energy storage efficiency can be improved.
In this embodiment, both the indoor unit casing of the indoor unit 1 and the outdoor unit casing of the outdoor unit 2 are metal casings or plastic casings; the shell of the water tank 3 is a metal shell; the peripheries of the outer sides of the indoor machine shell of the indoor machine set 1 and the shell of the water tank 3 are provided with heat insulation materials so as to prevent heat from being dissipated to the environment; the heat-insulating material is polyurethane, polystyrene, glass wool or rubber and plastic.
The working method of the direct expansion type phase change energy storage heat pump system comprises the following steps:
step S1: the indoor set temperature is set to beT asetThe set temperature of the hot water isT wset；
Step S2: the first temperature sensor T1 detects an indoor temperature ofT nThe second temperature sensor T2 detects that the air supply temperature of the indoor unit isT oThe third temperature sensor T3 detects that the temperature of the hot water in the water tank isT wIndoor temperatureT nAnd indoor set temperatureT asetControl temperature difference Δ therebetweenT aTemperature of hot waterT wSet temperature with hot waterT wsetControl temperature difference Δ therebetweenT wIndoor temperatureT nAnd the temperature of the air supplyT oControl temperature difference Δ therebetweenT o(ii) a In the cold supply mode, the air conditioner is in a cold supply mode,T nand set in the controller 4T asetAnd (a)T aset-△T a) The comparison is carried out in such a way that,T nand (a)T o+△T o) Comparing; in the heating mode, when the air conditioner is in the heating mode,T nand set in the controller 4T asetAnd (a)T aset+△T a) Comparing;T wset by the controller 4T wsetAnd (a) and (b)T wset-△T w) Carrying out comparison;
step S3: selecting, by the controller, an operating mode: a cold accumulation mode, a cold supply mode, a heating mode and a water tank heat accumulation mode;
step S4: executing a cold storage mode: the method is realized by the following steps:
step S41: when in useT w＜T wsetThen, the flow proceeds to step S42, whenT w≥T wsetThen, the process proceeds to step S43;
step S42: the controller 4 opens the second electromagnetic valve 18, the compressor 19 and the fifth electromagnetic valve 26, and closes the blower 10, the first electromagnetic valve 17, the third electromagnetic valve 22, the fourth electromagnetic valve 25, the sixth electromagnetic valve 27, the seventh electromagnetic valve 28, the eighth electromagnetic valve 29 and the condensing fan 32; the compressor 19 absorbs low-temperature and low-pressure refrigerant steam in the gas-liquid separator 20, the refrigerant steam is pressurized to form high-temperature and high-pressure refrigerant steam, the refrigerant steam sequentially enters the water tank 3 through the four-way reversing valve 21 and the fifth electromagnetic valve 26, exchanges heat with a phase change material and water in the water tank 3 to release heat, the phase change material is changed from a solid state to a liquid state, the refrigerant steam forms medium-temperature and high-pressure refrigerant liquid, the refrigerant liquid forms low-temperature and low-pressure refrigerant liquid after passing through the throttling device 24, the low-temperature and low-pressure refrigerant liquid enters the phase change energy storage and cold accumulation module 14 through the second electromagnetic valve 18 to absorb the heat of the phase change material, the phase change material is changed from the liquid state to the solid state, the low-temperature and low-pressure refrigerant liquid is changed into low-temperature and low-pressure refrigerant steam, and the refrigerant steam enters the gas-liquid separator 20 again through the four-way reversing valve 21 and is absorbed and compressed again by the compressor 19; the process is repeated, the phase change energy storage cold accumulation module 14 realizes cold accumulation, and the water tank 3 realizes heat accumulation; when the phase change energy storage cold accumulation module 14 is full, the step S2 is entered; otherwise, go to step S41; whether the cold energy of the phase change energy storage cold accumulation module 14 is fully accumulated is obtained through an algorithm;
step S43: the controller 4 opens the second electromagnetic valve 18, the compressor 19, the third electromagnetic valve 22, the fourth electromagnetic valve 25 and the condensing fan 32, and closes the blower 10, the first electromagnetic valve 17, the fifth electromagnetic valve 26, the sixth electromagnetic valve 27, the seventh electromagnetic valve 28 and the eighth electromagnetic valve 29; the condensing fan 32 introduces outdoor air into the outdoor unit 2 through the air inlet 30, exchanges heat with the refrigerant in the outdoor air-cooled heat exchanger 23, and discharges the air after heat exchange out of the room through the air outlet 31; the compressor 19 absorbs low-temperature low-pressure refrigerant steam in the gas-liquid separator 20, the refrigerant steam is pressurized to form high-temperature high-pressure refrigerant steam, the refrigerant steam sequentially enters the outdoor air-cooled heat exchanger 23 through the four-way reversing valve 21 and the third electromagnetic valve 22 to exchange heat with air to release heat, medium-temperature high-pressure refrigerant liquid is formed, the refrigerant liquid sequentially passes through the fourth electromagnetic valve 25 and the throttling device 24 to form low-temperature low-pressure refrigerant liquid, the refrigerant liquid enters the phase-change energy storage and cold accumulation module 14 through the second electromagnetic valve 18 to absorb heat of the phase-change material, the phase-change material is changed from a liquid state to a solid state, the low-temperature low-pressure refrigerant liquid is changed into low-temperature low-pressure refrigerant steam, and the refrigerant steam reenters the gas-liquid separator 20 through the four-way reversing valve 21 to be absorbed and compressed by the compressor 19 again; the process is repeated, and the phase change energy storage cold accumulation module 14 realizes cold accumulation; when the phase change energy storage cold accumulation module 14 is full, the step S2 is entered; otherwise, go to step S41; whether the cold energy of the phase change energy storage cold accumulation module 14 is fully accumulated is obtained through an algorithm;
step S5: executing a cooling mode: the method is realized by the following steps:
step S51: when in useT n＞T asetThen, the flow proceeds to step S52, whereT n≤T asetIf yes, the flow proceeds to step S53;
step S52: the controller 4 opens the blower 10 and the second electric air valve 16, closes the first electric air valve 15, the first electromagnetic valve 17, the second electromagnetic valve 18, the compressor 19, the third electromagnetic valve 22, the fourth electromagnetic valve 25, the fifth electromagnetic valve 26, the sixth electromagnetic valve 27, the seventh electromagnetic valve 28, the eighth electromagnetic valve 29 and the condensing fan 32; the blower 10 introduces indoor air into the second heat exchange channel 12 through the air return opening 8, the filter screen 9, the air return section 6 and the second electric air valve 16 in sequence, exchanges heat with the phase change material in the phase change energy storage cold accumulation module 14, and sends the air after heat exchange into the room through the fan section 5 and the air supply opening 7 in sequence; the above processes are repeated, and the room is cooled; when in useT n＜（T o+△T o) Then, the process proceeds to step S54; when in useT n≥（T o+△T o) And isT n≤（T aset-△T a) Then, the process proceeds to step S51;
step S53: the controller 4 turns on the blower 10 and the first electric air valve 15, and turns off the second electric air valve 16, the first electromagnetic valve 17, and the second electromagnetic valveThe valve 18, the compressor 19, the third electromagnetic valve 22, the fourth electromagnetic valve 25, the fifth electromagnetic valve 26, the sixth electromagnetic valve 27, the seventh electromagnetic valve 28, the eighth electromagnetic valve 29 and the condensing fan 32; the blower 10 delivers indoor air into a room through a return air inlet 8, a filter screen 9, a return air section 6, a first electric air valve 15, a first heat exchange channel 11, an indoor air-cooled heat exchanger 13, a fan section 5 and an air supply outlet 7 in sequence; when in useT n＞T asetThen, the process proceeds to step S51;
step S54: when the temperature is higher than the set temperatureT n＞T asetThen, the flow proceeds to step S55, whenT n≤T asetThen, the process proceeds to step S56;
step S55: when in useT w＜T wsetThen, the flow proceeds to step S57, whenT w≥T wsetThen, the process proceeds to step S58;
step S56: the controller 4 opens the blower 10 and the first electric air valve 15, closes the second electric air valve 16, the first electromagnetic valve 17, the second electromagnetic valve 18, the compressor 19, the third electromagnetic valve 22, the fourth electromagnetic valve 25, the fifth electromagnetic valve 26, the sixth electromagnetic valve 27, the seventh electromagnetic valve 28, the eighth electromagnetic valve 29 and the condensing fan 32; the blower 10 delivers indoor air into a room through a return air inlet 8, a filter screen 9, a return air section 6, a first electric air valve 15, a first heat exchange channel 11, an indoor air-cooled heat exchanger 13, a fan section 5 and an air supply outlet 7 in sequence; when in useT n＞T asetIf yes, the flow proceeds to step S54;
step S57: the controller 4 turns on the blower 10, the first electromagnetic valve 17, the compressor 19, and the fifth electromagnetic valve 26, and turns off the second electromagnetic valve 18, the third electromagnetic valve 22, the fourth electromagnetic valve 25, the sixth electromagnetic valve 27, the seventh electromagnetic valve 28, and the eighth electromagnetic valve 29; the blower 10 introduces indoor air into the first heat exchange channel 11 through the air return opening 8, the filter screen 9, the air return section 6 and the first electric air valve 15 in sequence, exchanges heat with a refrigerant of the indoor air-cooled heat exchanger 13, sends the air after heat exchange into the room through the blower section 5 and the air supply opening 7 in sequence, and cools the indoor environment; the compressor 19 absorbs the low-temperature and low-pressure refrigerant vapor in the gas-liquid separator 20, pressurizes the refrigerant vapor to form high-temperature and high-pressure refrigerant vapor, and performs refrigerationThe refrigerant vapor enters the water tank 3 through the four-way reversing valve 21 and the fifth electromagnetic valve 26 in sequence, exchanges heat with the phase-change material and water in the water tank 3 to release heat, the phase-change material is changed from a solid state to a liquid state, the refrigerant vapor forms medium-temperature high-pressure refrigerant liquid, the refrigerant vapor forms low-temperature low-pressure refrigerant liquid after passing through the throttling device 24, the refrigerant vapor enters the indoor air-cooled heat exchanger 13 through the first electromagnetic valve 17 to exchange heat with indoor return air, the low-temperature low-pressure refrigerant liquid is changed into low-temperature low-pressure refrigerant vapor, the low-temperature low-pressure refrigerant vapor enters the gas-liquid separator 20 again through the four-way reversing valve 21 and is absorbed and compressed by the compressor 19 again; the process is repeated, the room is cooled, and the water tank 3 stores heat; when in useT n≤（T aset-△T a) If yes, the flow proceeds to step S54; when in useT n＞（T aset-△T a) And isT w≥（T wset+△T w) Then, the process proceeds to step S55;
step S58: the controller 4 opens the second electromagnetic valve 18, the compressor 19, the third electromagnetic valve 22, the fourth electromagnetic valve 25 and the condensing fan 32, and closes the blower 10, the first electromagnetic valve 17, the fifth electromagnetic valve 26, the sixth electromagnetic valve 27, the seventh electromagnetic valve 28 and the eighth electromagnetic valve 29; the blower 10 introduces indoor air into the first heat exchange channel 11 through the air return opening 8, the filter screen 9, the air return section 6 and the first electric air valve 15 in sequence, exchanges heat with a refrigerant of the indoor air-cooled heat exchanger 13, sends the air after heat exchange into the room through the blower section 5 and the air supply opening 7 in sequence, and cools the indoor environment; the condensing fan 32 discharges the outdoor air to the outside after passing through the air inlet 30, the outdoor air-cooled heat exchanger 23 and the air outlet 31 in sequence; the compressor 19 absorbs the low-temperature low-pressure refrigerant vapor in the gas-liquid separator 20, the refrigerant vapor is pressurized to form high-temperature high-pressure refrigerant vapor, the refrigerant vapor sequentially passes through the four-way reversing valve 21 and the third electromagnetic valve 22 to enter the outdoor air-cooled heat exchanger 23 to exchange heat with air to release heat, medium-temperature high-pressure refrigerant liquid is formed, the refrigerant liquid sequentially passes through the fourth electromagnetic valve 25 and the throttling device 24 to form low-temperature low-pressure refrigerant liquid, the refrigerant liquid enters the indoor air-cooled heat exchanger 13 through the first electromagnetic valve 17 to exchange heat with indoor return air, and the low-temperature low-pressure refrigerant liquid is changed into low-temperature low-pressure refrigerant vaporThe refrigerant steam enters the gas-liquid separator 20 again through the four-way reversing valve 21 and is absorbed and compressed again by the compressor 19; the above processes are repeated, and the room is cooled; when in useT n≤（T aset-△T a) Then, the process proceeds to step S54; otherwise, go to step S55;
step S6: executing a heating mode: the method is realized by the following steps:
step S61: when in useT n＜T asetThen, the flow proceeds to step S62, whenT n≥T asetThen, the process proceeds to step S63;
step S62: the controller 4 opens the blower 10, the first electric air valve 15, the first electromagnetic valve 17, the compressor 19, the third electromagnetic valve 22, the fourth electromagnetic valve 25 and the condensing fan 32, and closes the second electric air valve 16, the second electromagnetic valve 18, the fifth electromagnetic valve 26, the sixth electromagnetic valve 27, the seventh electromagnetic valve 28 and the eighth electromagnetic valve 29; the blower 10 introduces indoor air into the first heat exchange channel 11 through the air return opening 8, the filter screen 9, the air return section 6 and the first electric air valve 15 in sequence, exchanges heat with a refrigerant of the indoor air-cooled heat exchanger 13, and sends the air after heat exchange into the room through the blower section 5 and the air supply opening 7 in sequence; the compressor 19 absorbs low-temperature low-pressure refrigerant steam in the gas-liquid separator 20, the refrigerant steam is pressurized to form high-temperature high-pressure refrigerant steam, the refrigerant steam enters the indoor air-cooled heat exchanger 13 through the four-way reversing valve 21 to exchange heat with indoor return air to release heat, medium-temperature high-pressure refrigerant liquid is formed, the refrigerant steam sequentially passes through the first electromagnetic valve 17 and the throttling device 24 to form low-temperature low-pressure refrigerant liquid, the refrigerant steam enters the outdoor air-cooled heat exchanger 23 through the fourth electromagnetic valve 25 to absorb heat of outdoor air, the low-temperature low-pressure refrigerant steam is formed, the refrigerant steam sequentially passes through the third electromagnetic valve 22 and the four-way reversing valve 21 to reenter the gas-liquid separator 20 and is absorbed and compressed by the compressor 19 again; the process is repeated, and the room is heated; when in useT n≥（T aset+△T a) Then, the process proceeds to step S61;
step S63: the controller 4 turns on the blower 10 and the first electric air valve 15, and turns off the second electric air valve 16 and the first electric air valveThe electromagnetic valve 17, the second electromagnetic valve 18, the compressor 19, the third electromagnetic valve 22, the fourth electromagnetic valve 25, the fifth electromagnetic valve 26, the sixth electromagnetic valve 27, the seventh electromagnetic valve 28, the eighth electromagnetic valve 29 and the condensing fan 32; the blower 10 delivers indoor air into a room through a return air inlet 8, a filter screen 9, a return air section 6, a first electric air valve 15, a first heat exchange channel 11, an indoor air-cooled heat exchanger 13, a fan section 5 and an air supply outlet 7 in sequence; when in useT n＜T asetThen, the process proceeds to step S61;
step S7: executing a water tank heat storage mode: the method is realized by the following steps:
step S71: when in useT w＜T wsetThen, the flow proceeds to step S72, whenT w≥T wsetThen, the process proceeds to step S73;
step S72: the controller 4 turns on the compressor 19, the third electromagnetic valve 22, the sixth electromagnetic valve 27, the seventh electromagnetic valve 28 and the condensing fan 32, and turns off the blower 10, the first electric air valve 15, the second electric air valve 16, the first electromagnetic valve 17, the second electromagnetic valve 18, the fourth electromagnetic valve 25, the fifth electromagnetic valve 26 and the eighth electromagnetic valve 29; the compressor 19 absorbs low-temperature and low-pressure refrigerant steam in the gas-liquid separator 20, the refrigerant steam is pressurized to form high-temperature and high-pressure refrigerant steam, the refrigerant steam enters the water tank 3 through the four-way reversing valve 21 and the seventh electromagnetic valve 28 in sequence, the refrigerant steam exchanges heat with phase change materials and water in the water tank 3 to release heat, the phase change materials are changed from solid to liquid, the refrigerant steam forms medium-temperature and high-pressure refrigerant liquid, the refrigerant steam forms low-temperature and low-pressure refrigerant liquid through the throttling device 24, the low-temperature and low-pressure refrigerant liquid enters the outdoor air-cooled heat exchanger 23 through the sixth electromagnetic valve 27 to absorb heat of outdoor air, the low-temperature and low-pressure refrigerant liquid is changed into low-temperature and low-pressure refrigerant steam, the low-temperature and low-pressure refrigerant liquid enters the gas-liquid separator 20 again through the third electromagnetic valve 22 and the four-way reversing valve 21 in sequence and is absorbed and compressed again by the compressor 19; the process is repeated, and the water tank realizes heat storage; when the temperature is higher than the set temperatureT w≥T wsetIf the water tank is full, the process proceeds to step S2;
step S73: the controller 4 turns off the blower 10, the first electric air valve 15, the second electric air valve 16, the first electromagnetic valve 17, the second electromagnetic valve 18, and the pressureThe compressor 19, the third electromagnetic valve 22, the fourth electromagnetic valve 25, the fifth electromagnetic valve 26, the sixth electromagnetic valve 27, the seventh electromagnetic valve 28, the eighth electromagnetic valve 29, and the condensing fan 32, and the process advances to step S2; when in useT w≤（T wset-△T w) Then, the process proceeds to step S71.
Under the control mode, different operation working conditions are started according to different input modes and detected parameters, wherein the night valley electricity price is mainly used for cold storage of the phase-change material, the cold energy stored by the phase-change material is used for cooling the indoor environment, the night valley electricity price is used for heat storage of the phase-change material, the heat stored by the phase-change material is used for preparing hot water, and the waste heat of the vapor compression refrigeration cycle is recovered for preparing the hot water; the indoor set temperatureT asetSetting the temperature to be 26 ℃ in summer and 20 ℃ in winter; the set temperature of the hot waterT wsetIs 45 ℃; the control temperature difference delta between the indoor temperature and the indoor set temperatureT aSetting the temperature to be 2 ℃; the control temperature difference delta between the hot water temperature and the set hot water temperatureT wSetting the temperature to be 2 ℃; the control temperature delta between the indoor temperature and the air supply temperature during cold supplyT oThe temperature was set to 1 ℃.
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.
If the utility model discloses or relates to parts or structures which are fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, terms used in any technical aspect of the present disclosure for indicating positional relationship or shape include, unless otherwise stated, states or shapes similar, analogous or approximate thereto.
Any part provided by the utility model can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (6)
1. The utility model provides a direct expansion formula phase change energy storage heat pump system which characterized in that: the air conditioner comprises an indoor unit, an outdoor unit and a water tank which are connected through pipelines, wherein the indoor unit comprises an indoor unit shell, a fan section is arranged above the interior of the indoor unit shell, a return air section is arranged below the interior of the indoor unit shell, an air supply outlet communicated with the fan section is arranged at the upper part of the side surface of the indoor unit shell, and a return air inlet communicated with the return air section is arranged at the lower part of the side surface of the indoor unit shell; the middle part of the indoor unit shell is provided with a first heat exchange channel and a second heat exchange channel, the upper end of the first heat exchange channel is communicated with the fan section, and the lower end of the first heat exchange channel is communicated with the return air section; the upper end of the second heat exchange channel is communicated with the fan section, and the lower end of the second heat exchange channel is communicated with the air return section; an indoor air-cooled heat exchanger is arranged in the first heat exchange channel, and a phase change energy storage and cold accumulation device is arranged in the second heat exchange channel; and a phase change energy storage and heat accumulation device is arranged in the water tank.
2. The direct expansion phase change energy storage heat pump system of claim 1, wherein: the lower end of the first heat exchange channel is provided with a first electric air valve for controlling the opening and closing of the first heat exchange channel; the lower end of the second heat exchange channel is provided with a second electric air valve used for controlling the opening and closing of the second heat exchange channel; the indoor air-cooled heat exchanger and the first electromagnetic valve are connected in series through a refrigerant pipeline, and then the indoor air-cooled heat exchanger and the first electromagnetic valve are connected in parallel with the phase-change energy-storage cold-storage device and the second electromagnetic valve through a refrigerant pipeline.
3. The direct expansion phase change energy storage heat pump system of claim 2, wherein: the outdoor unit comprises an outdoor machine shell provided with an air inlet and an air outlet, a compressor, a gas-liquid separator, a four-way reversing valve, a third electromagnetic valve, an outdoor air-cooled heat exchanger, a throttling device, a fourth electromagnetic valve, a fifth electromagnetic valve, a sixth electromagnetic valve, a seventh electromagnetic valve, an eighth electromagnetic valve and a condensing fan; the air suction port of the compressor is connected with the gas-liquid separator through a refrigerant pipeline, and the air exhaust port is connected with the four-way reversing valve through a refrigerant pipeline; one port of the four-way reversing valve is connected with the gas-liquid separator through a refrigerant pipeline, one port of the four-way reversing valve is connected with the outdoor air-cooled heat exchanger through the refrigerant pipeline by a third electromagnetic valve, and the other port of the four-way reversing valve is connected with one end of the indoor air-cooled heat exchanger through the refrigerant pipeline; one end of the throttling device is connected with the outdoor air-cooled heat exchanger through a fourth electromagnetic valve through a refrigerant pipeline, and the other end of the throttling device is connected with the indoor air-cooled heat exchanger through a first electromagnetic valve through the refrigerant pipeline; a pipeline formed by connecting the water tank and the fifth electromagnetic valve in series is connected with a pipeline formed by connecting the third electromagnetic valve, the outdoor air-cooled heat exchanger and the fourth electromagnetic valve in series in parallel; a pipeline where the fourth electromagnetic valve and the throttling device are connected in series is connected with a pipeline where the sixth electromagnetic valve is located in parallel; one end of the seventh electromagnetic valve is connected to a pipeline between the water tank and the fifth electromagnetic valve through a refrigerant pipeline, and the other end of the seventh electromagnetic valve is connected to a pipeline between the four-way reversing valve and the indoor air-cooled heat exchanger through a refrigerant pipeline; one end of the eighth electromagnetic valve is connected to a pipeline between the third electromagnetic valve and the outdoor air-cooled heat exchanger through a refrigerant pipeline, and the other end of the eighth electromagnetic valve is connected to a pipeline between the four-way reversing valve and the indoor air-cooled heat exchanger through a refrigerant pipeline.
4. The direct expansion phase change energy storage heat pump system of claim 3, wherein: a first temperature sensor is arranged at the air return opening; a second temperature sensor is arranged at the air supply opening; and a third temperature sensor is arranged at the water outlet pipe of the water tank.
5. The direct expansion phase change energy storage heat pump system of claim 3, wherein: a water inlet pipe, a water outlet pipe and a water outlet pipe are arranged on the shell of the water tank, and the phase change energy storage and heat storage device is positioned in the water tank; the water inlet pipe is sequentially provided with a filter, a check valve and a first gate valve; and a second gate valve is arranged on the drain pipe.
6. The direct expansion phase change energy storage heat pump system of claim 1, wherein: the phase-change energy storage cold accumulation device and the phase-change energy storage heat accumulation device are composed of a plurality of phase-change energy storage modules which are parallel to each other, the phase-change energy storage modules are embedded in a metal plate by adopting phase-change materials, a refrigerant pipeline is coiled in a shape like a Chinese character 'hui' in the phase-change materials, a certain distance is reserved between the refrigerant pipeline and the phase-change materials, the external shape of the refrigerant pipeline is a light pipe or a cuboid with external fins, and a certain distance is reserved between adjacent phase-change energy storage modules to form a channel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220172000.XU CN216924608U (en) | 2022-01-22 | 2022-01-22 | Direct expansion type phase change energy storage heat pump system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220172000.XU CN216924608U (en) | 2022-01-22 | 2022-01-22 | Direct expansion type phase change energy storage heat pump system |
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| CN216924608U true CN216924608U (en) | 2022-07-08 |
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| CN202220172000.XU Expired - Fee Related CN216924608U (en) | 2022-01-22 | 2022-01-22 | Direct expansion type phase change energy storage heat pump system |
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2022
- 2022-01-22 CN CN202220172000.XU patent/CN216924608U/en not_active Expired - Fee Related
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Granted publication date: 20220708 |