CN218884312U - Air source heat pump changes in temperature hot-water heating system - Google Patents
Air source heat pump changes in temperature hot-water heating system Download PDFInfo
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- CN218884312U CN218884312U CN202320132487.3U CN202320132487U CN218884312U CN 218884312 U CN218884312 U CN 218884312U CN 202320132487 U CN202320132487 U CN 202320132487U CN 218884312 U CN218884312 U CN 218884312U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 222
- 238000010438 heat treatment Methods 0.000 title claims abstract description 56
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 238000004378 air conditioning Methods 0.000 claims description 2
- 238000005057 refrigeration Methods 0.000 abstract description 5
- 239000003507 refrigerant Substances 0.000 description 30
- 238000005338 heat storage Methods 0.000 description 14
- 239000008236 heating water Substances 0.000 description 14
- 230000006872 improvement Effects 0.000 description 8
- 239000000243 solution Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 206010015856 Extrasystoles Diseases 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses an air source heat pump cold and warm hot water system, which belongs to the technical field of air source heat pumps, and comprises a four-way valve and a first loop, wherein the first loop comprises a vapor-liquid separator, a compressor and a hot water heat exchanger which are sequentially communicated; the water way side of the hot water heat exchanger is connected with a water storage device through a pipeline, and the water storage device is connected with a water inlet pipe; the second loop comprises a cooling and heating heat exchanger and a fin heat exchanger which are connected through pipelines, the cooling and heating heat exchanger is connected with a second interface of the four-way valve, and the fin heat exchanger is connected with a fourth interface of the four-way valve; the water path side of the cooling and heating heat exchanger is connected with a working module, and a throttling element is arranged between the cooling and heating heat exchanger and the fin heat exchanger. The utility model discloses a set up cross valve control first loop and second loop, realize the interconversion between three kinds of functions of refrigeration, heating, hot water.
Description
Technical Field
The utility model belongs to the technical field of air source heat pump, concretely relates to air source heat pump changes in temperature hot-water heating system.
Background
Along with the improvement of the living standard of people, the functional requirements of people on a central air conditioner are higher and higher, from simple air conditioner refrigeration and heating to the current air conditioner and hot water integration requirements; especially, heating in northern areas of China becomes indispensable for most families, so the air source heat pump triple co-generation unit is developed on the basis of the background. An air source heat pump is an energy-saving device which utilizes high-level energy to enable heat to flow from low-level heat source air to a high-level heat source, and is a form of heat pump. As the name implies, a heat pump, like a pump, can convert low-level heat energy (such as heat contained in air, soil and water) which cannot be directly utilized into high-level heat energy which can be utilized, thereby achieving the purpose of saving part of high-level energy (such as coal, gas, oil, electric energy and the like). The air source triple co-generation unit has three functions of refrigeration, heating and hot water supply, and the energy-saving effect is obvious.
The air source triple co-generation unit system in the existing market has a complex structure for simultaneously using domestic hot water in a refrigeration mode, so that the use cost of a user is increased; and, can't circulate surplus heat to the hot water of life to recycle when reaching the set temperature under the state of heating, cause the waste of the energy, for example chinese patent document CN202813879U an ultra-low temperature air source heat pump trigeminy supplies the unit system, disclose including evaporimeter, condenser, compressor, four-way valve, expansion valve one, connect evaporimeter, condenser, compressor, expansion valve one respectively by the four-way valve and constitute, the compressor adopt the low temperature air injection enthalpy increasing compressor, condenser, compressor between be equipped with economic ware, capillary tube in addition and connect, form and supply air enthalpy increasing loop, adaptable cold low temperature environment, but this system is not good in energy-conserving effect in the in-service use, does not combine three kinds of functions of heating and refrigerating perfectly, leads to the low utilization ratio of resource.
Disclosure of Invention
In order to solve the technical problems, the inventor obtains the technical scheme of the utility model through practice and summary, the utility model discloses an air source heat pump cold and hot water system, which comprises a four-way valve, a first loop and a second loop;
the first loop comprises a vapor-liquid separator, a compressor and a hot water heat exchanger which are sequentially communicated, the hot water heat exchanger is connected with a first interface of the four-way valve, and the vapor-liquid separator is connected with a third interface of the four-way valve;
the water way side of the hot water heat exchanger is connected with a water storage device through a pipeline, and the water storage device is connected with a water inlet pipe;
the second loop comprises a cooling and heating heat exchanger and a fin heat exchanger which are connected through pipelines, the cooling and heating heat exchanger is connected with a second interface of the four-way valve, and the fin heat exchanger is connected with a fourth interface of the four-way valve;
the water path side of the cooling and heating heat exchanger is connected with a working module, and a throttling element is arranged between the cooling and heating heat exchanger and the fin heat exchanger.
Make following improvement in this application scheme, install the water pump on the outlet conduit between water storage device and the hot water heat exchanger, and be connected with the hot water outlet pipe on the water storage device, water storage device's inside top-down installs hot water sensor.
In the solution according to the invention, the throttling element pipe is provided at both ends with a first filter and/or a second filter.
In the scheme of the application, the improvement is that the working module comprises a water supply pipe and a water return pipe, and an air conditioner fan coil and/or a floor heating device which are connected on the water supply pipe and the water return pipe in parallel, and a circulating pump is arranged on a pipeline between the working module and the cold-heat exchanger.
In the scheme of the application, a water flow switch is arranged on a connecting pipeline between the working module and the cooling and heating heat exchanger.
In the scheme of the application, the improvement is made that the inlet pipeline of the circulating pump is provided with a filter.
In the scheme of the application, the improvement is made that the lower end sleeve of the compressor is provided with a crankshaft heating belt, so that the compressor is prevented from generating liquid compression in the starting and running processes, and the refrigerant is prevented from being mixed with the refrigerating oil.
Make following improvement in this application scheme, heat transfer fan is installed to one side of fin heat exchanger, and fin heat exchanger bottom is equipped with the chassis heating band.
In the scheme of the application, the improvement is made that a pressure element and/or a temperature sensor are arranged between the compressor and the hot water heat exchanger and on an inlet pipe or an outlet pipe of the vapor-liquid separator. The temperature is detected by arranging the temperature sensor, so that the compressor can make judgment according to the change of water temperature and air temperature, and the frequency conversion and energy conservation are realized.
In the scheme of the application, the improvement is that temperature sensors are arranged between the cooling and heating heat exchanger and the first filter and between the second filter and the fin heat exchanger.
Compared with the prior art, the utility model discloses possess following beneficial effect:
1. the utility model discloses an air source heat pump changes in temperature hot-water heating system, through setting up four-way valve control first loop and second loop, supply the trigeminy of ground heating, changes in temperature, hot water as an organic whole, ensure the steady reliable and energy-conserving operation of system, effectively improve the utilization ratio of resource, system easy operation, convenient to use is swift, can adapt to different areas and use, and the restriction is little, and application scope is extensive;
2. the utility model discloses a change the hookup location of inlet tube, on the one hand with the cold water in the inlet tube earlier with deposit in the water installation existing warm hot water mix the back and pump into the hot water heat exchanger in and heat for air source heat pump set can long-time steady operation, reduces the unnecessary energy consumption. The traditional connection mode is as follows: the water inlet pipe is directly connected with the inlet of the water pump, and the water pump pumps cold water in the water inlet pipe after the water pump is started, so that when the temperature of the water entering the hot water heat exchanger is too low, the low pressure of the unit can reach a protection value, and the unit is stopped by low-pressure alarm; on the other hand, because the free end of the water inlet pipe is connected with an external tap water pipe, when the tap water stops supplying, air can be mixed in the water inlet pipe, and if the water pump is started to pump water, the water pump can idle, so that damage and faults are caused; the water inlet pipe is connected with the water storage device, so that the waterway system can not be in a water-free state after the water pump is started, and the water pump is prevented from idling.
3. The utility model discloses a fluorine way side passageway to changes in temperature heat exchanger is simplified, reduction in production and use cost to set up the filter at the both ends of throttling element place pipeline, ensure that the operation of pipeline is unobstructed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of a four-way valve according to the present invention;
fig. 3 is a schematic structural diagram of embodiment 2 of the present invention;
fig. 4 is a schematic structural diagram of embodiment 3 of the present invention.
Description of the preferred embodiment
The application of the principles of the present invention will be further described with reference to the accompanying drawings and specific embodiments.
Examples
As shown in fig. 1-2, an air source heat pump cold and hot water system comprises a four-way valve 1, a vapor-liquid separator 2, a compressor 3, a hot water heat exchanger 4, a cold and hot heat exchanger 6 and a fin heat exchanger 7, wherein the devices are connected through pipelines; the four-way valve 1 comprises four interfaces which are a first interface 11, a second interface 12, a third interface 13 and a fourth interface 14 respectively, the first interface 11 is an air inlet of the four-way valve 1, the third interface 13 is a liquid return port of the four-way valve 1, the second interface 12 is a first air outlet of the four-way valve 1, the fourth interface 14 is a second air outlet of the four-way valve 1, the second interface 12 and the fourth interface 14 are respectively arranged at two sides of the third interface 13, and the four-way valve 1 is switched to realize cold and warm switching under the control of a control system;
the vapor-liquid separator 2 is connected with a third interface 13 of the four-way valve 1, the hot water heat exchanger 4 is connected with a first interface 11 of the four-way valve 1, and then the vapor-liquid separator 2, the compressor 3 and the hot water heat exchanger 4 are sequentially communicated to form a first loop; the lower end of the compressor 3 is sleeved with a crankshaft heating belt 31, a pressure element 15 and a temperature sensor 16 are mounted between the compressor 3 and the hot water heat exchanger 4 and on an inlet pipeline of the vapor-liquid separator 2, and the pressure element 15 is a pressure controller or a pressure sensor;
the water path side of the hot water heat exchanger 4 is connected with a water storage device 5, the hot water heat exchanger 4 is connected with the water storage device 5 through a pipeline, and meanwhile, hot water temperature sensors 41 are mounted at the joints of the hot water heat exchanger 4 and the pipeline to monitor the work of the hot water heat exchanger 4 in real time; a water pump is further arranged on a water outlet pipeline between the water storage device 5 and the hot water heat exchanger 4, meanwhile, the upper part and the lower part of one side of the water storage device 5 are respectively connected with a hot water outlet pipe 52 and a water inlet pipe 51, and a hot water sensor 53 is further arranged in the device. During the use, cold water gets into water storage device 5 through inlet tube 51 and mixes with inside hot water, causes inside temperature to descend to open heat pump heating system, the pipeline that the water in the water storage device 5 passes through the water pump place gets into hot water heat exchanger 4, in another pipeline of rethread top gets back to water storage device 5 after the heating, exports via water storage device 5 upper portion's hot water outlet pipe 52 again, realizes supplying water.
A throttling element 73 is arranged between the cold-heat exchanger 6 and the fin-type heat exchanger 7, the throttling element 73 is an electronic expansion valve, a thermal expansion valve or a capillary tube, and a first filter 72 and a second filter 74 are arranged at two ends of a pipeline of the throttling element 73; the cooling and heating heat exchanger 6 is connected with a second interface 12 of the four-way valve 1, the fin heat exchanger 7 is connected with a fourth interface 14 of the four-way valve 1, and then the cooling and heating heat exchanger 6, the first filter 72, the throttling element 73, the second filter 74 and the fin heat exchanger 7 are sequentially communicated through pipelines to form a second loop, wherein the second loop and the first loop are both fluorine channels; a working module 9 is connected to the waterway side of the cooling-heating heat exchanger 6, and consists of a water supply pipe, a water return pipe, an air-conditioning fan coil 92 and a floor heating 93 which are connected to the water supply pipe and the water return pipe in parallel, a water flow switch 91 is arranged on a connecting pipeline of the water supply pipe and the cooling-heating heat exchanger 6, a circulating pump 95 is arranged on a pipeline between the working module 9 and the cooling-heating heat exchanger 6, a filter 94 is arranged on an inlet pipeline of the circulating pump 95, and temperature sensors are arranged between the cooling-heating heat exchanger 6 and the first filter 72 as well as between the second filter 74 and the fin heat exchanger 7; a heat exchange fan 8 is arranged on one side of the fin heat exchanger 7, and a chassis heating belt 71 is arranged at the bottom of the fin heat exchanger 8.
The temperature sensors 16 are fixed outside the pipeline through heat insulating materials, and the temperature of each part of the pipeline is monitored.
The working principle is as follows:
and (3) a refrigeration process: the compressor 3 compresses the refrigerant medium to discharge the refrigerant medium with high temperature and high pressure, the refrigerant with high temperature and high pressure exchanges heat between water and the refrigerant through the hot water heat exchanger 4, so that the refrigerant becomes medium temperature and high pressure, the temperature of water rises, and then the water pump conveys the heated hot water to the water storage device 5; the medium-temperature high-pressure refrigerant enters the fin heat exchanger 7 through the four-way valve 1, the heat exchange fan 8 conveys air to exchange heat between the air and the medium-temperature high-pressure refrigerant in the fin heat exchanger 7, so that the refrigerant is changed into medium-temperature high-pressure liquid, the medium-temperature high-pressure liquid is throttled by the throttling element 73 to be changed into low-temperature low-pressure gas-liquid mixed refrigerant, the low-temperature low-pressure gas-liquid mixed refrigerant enters the cold-heat exchanger 6, the temperature of water in the cold-heat exchanger 6 is reduced, and then the circulating pump 95 conveys cold water to the air conditioner fan coil 92; the gas-liquid mixed refrigerant flows into the gas-liquid separator 2 through the four-way valve 1 to be subjected to gas-liquid separation, and then flows back to the inside of the compressor 3.
Heating process: the compressor 3 compresses the refrigerant medium, discharges the high-temperature and high-pressure refrigerant medium, the high-temperature and high-pressure refrigerant enters the cooling and heating heat exchanger 6 through the hot water heat exchanger 4 and the four-way valve 1 and exchanges heat between water and the refrigerant with the cooling and heating heat exchanger 6, so that the refrigerant is changed into medium temperature and high pressure, the temperature of the water is increased, and then the circulating pump 95 conveys the heated hot water to the ground heater 93 through the filter 94; the medium-temperature high-pressure refrigerant is filtered by the first filter 72, throttled by the throttling element 73 to become a low-temperature low-pressure liquid refrigerant medium, then enters the fin heat exchanger 7 through the second filter 74, and the heat exchange fan 8 transfers air to exchange heat with the low-temperature low-pressure liquid refrigerant medium in the fin heat exchanger 7 to become a gas-liquid mixed refrigerant, and then flows into the gas-liquid separator 2 through the four-way valve 1 to be subjected to gas-liquid separation, and then flows back to the inside of the compressor 1.
And (3) a hot water process: the compressor 1 compresses the refrigerant medium inside, discharges the refrigerant medium with high temperature and high pressure, the refrigerant with high temperature and high pressure exchanges heat between water and refrigerant through the hot water heat exchanger 4, so that the refrigerant becomes medium temperature and high pressure, the temperature of the water rises, then the water pump conveys the heated hot water to the water storage device 5, the water in the water storage device 5 flows back from another pipeline at the upper part and enters the inside of the hot water heat exchanger 4; the medium-temperature high-pressure refrigerant enters the cold and warm heat exchanger 6 through the four-way valve 1, is filtered by the first filter 72, is throttled by the throttling element 73 to become a low-temperature low-pressure liquid refrigerant medium, then enters the fin heat exchanger 7 through the second filter 74, is conveyed by the heat exchange fan 8 to exchange heat with the low-temperature low-pressure liquid refrigerant medium in the fin heat exchanger 7 to become a gas-liquid mixed refrigerant, enters the gas-liquid separator 2 through the four-way valve 1 to be subjected to gas-liquid separation, and then flows back to the inside of the compressor 1.
Examples
On the basis of the above technical scheme, as shown in fig. 3, an open water tank is adopted as the water storage device 5, the top of the open water tank is connected with a water inlet pipe 51, the lower end of the side edge is connected with a hot water outlet pipe 52, and a hot water sensor 53 is further installed inside the open water tank to detect the water temperature in real time.
When the heat pump water heater is used, the water inlet pipe 51 is opened, cold water enters the open water tank and is mixed with hot water to cause the water temperature inside the open water tank to be reduced to a set value, the open water tank is kept still for a period of time to allow the cold water to sink and the hot water to rise, then the cold water is added to enable the water temperature inside the open water tank to be reduced to a lower limit value, and at the moment, the heat pump heating system starts to work to heat water in the open water tank; when the hot water sensor 53 detects that the water temperature inside is higher than the set value, the heat pump heating system stops working, if the water temperature inside is lower than the lower limit value, the heat pump heating system continues working, so that the water temperature inside the whole open water tank is repeatedly ensured to always meet the use temperature requirement, and finally, the water is output by the hot water outlet pipe 52 at the lower end of the open water tank to realize water supply.
Examples
On the basis of the above technical solution, as shown in fig. 4, a pressure-bearing module is adopted as the water storage device 5, the pressure-bearing module is composed of a heating water tank and two heat storage water tanks, and the two heat storage water tanks are respectively a first heat storage water tank 54 and a second heat storage water tank 55; through pipeline through connection between heating water tank and first heat storage water tank 54's the top, and be connected with hot water outlet pipe 52 on the pipeline between heating water tank and the first heat storage water tank 54 top, second heat storage water tank 55 top still is connected with inlet tube 51, pipeline and water pump place pipe connection are passed through to one side of this inlet tube 51, be provided with solenoid valve one and solenoid valve two on the pipeline between this inlet tube and water pump and the heating water tank respectively, also through pipeline through connection between two heat storage water tanks, and heating water tank and heat storage water tank's inside all installs hot water sensor 53.
When the water heating system is used, when the hot water sensor 53 on the heating water tank detects that the water temperature in the heating water tank is lower than a set value (the water temperature required by the pressure-bearing module in the heating water tank can be freely set by a control instrument), the second electromagnetic valve is opened, the heat pump heating system starts to work, water in the heating water tank enters the hot water heat exchanger 4 through a pipeline where the water pump is located, and the water is heated inside and then flows back to the heating water tank from the pipeline above; after the heat pump heating system works for a period of time, when the hot water sensor 53 on the heating water tank detects that the water temperature in the heating water tank is higher than a set value, the first electromagnetic valve is opened, at the moment, the water in the second heat storage water tank 55 is conveyed into the heating water tank, the heated water in the heating water tank is conveyed into the first heat storage water tank 54, the water in the first heat storage water tank 54 also enters the second heat storage water tank 55, circulation is sequentially carried out, when the hot water sensor 53 on the second heat storage water tank 55 detects that the temperature reaches the set value, the heat pump heating system stops working, and the first electromagnetic valve and the second electromagnetic valve are closed; subsequently, when the user takes hot water from the hot water outlet pipe 52, cold water is introduced into the inside of the second hot water storage tank 55 from the inlet pipe 51, and finally into the heating tank to form a circulation.
Claims (10)
1. The utility model provides an air source heat pump changes in temperature hot-water heating system, includes cross valve (1), its characterized in that:
comprises a first loop and a second loop;
the first loop comprises a gas-liquid separator (2), a compressor (3) and a hot water heat exchanger (4) which are sequentially communicated, the hot water heat exchanger (4) is connected with a first interface of the four-way valve (1), and the gas-liquid separator (2) is connected with a third interface of the four-way valve (1);
the water channel side of the hot water heat exchanger (4) is connected with a water storage device (5) through a pipeline, and the water storage device (5) is connected with a water inlet pipe (51);
the second loop comprises a cooling and heating heat exchanger (6) and a fin heat exchanger (7) which are connected through pipelines, the cooling and heating heat exchanger (6) is connected with a second interface of the four-way valve (1), and the fin heat exchanger (7) is connected with a fourth interface of the four-way valve (1);
the working module (9) is connected to the waterway side of the cooling and heating heat exchanger (6), and a throttling element (73) is arranged between the cooling and heating heat exchanger (6) and the fin heat exchanger (7).
2. The air-source heat pump hot and cold water system according to claim 1, wherein: a water pump is arranged on a water outlet pipeline between the water storage device (5) and the hot water heat exchanger (4), a hot water outlet pipe (52) is connected to the water storage device (5), and a hot water sensor (53) is arranged in the water storage device (5) from top to bottom.
3. The air-source heat pump cold-warm-hot water system according to claim 1, characterized in that: the two ends of the throttling element (73) pipeline are provided with a first filter (72) and/or a second filter (74).
4. The air-source heat pump cold-warm-hot water system according to claim 1, characterized in that: the working module (9) comprises a water supply pipe, a water return pipe, an air-conditioning fan coil (92) and/or a floor heating (93) which are connected to the water supply pipe and the water return pipe in parallel, and a circulating pump (95) is installed on a pipeline between the working module (9) and the cooling-heating heat exchanger (6).
5. The air-source heat pump cold-warm-hot water system according to claim 4, characterized in that: and a water flow switch (91) is arranged on a connecting pipeline of the working module (9) and the cold-heat exchanger (6).
6. The air-source heat pump cold-warm-hot water system according to claim 5, characterized in that: and a filter (94) is arranged on an inlet pipeline of the circulating pump (95).
7. The air-source heat pump cold-warm-hot water system according to claim 1, characterized in that: the lower end of the compressor (3) is sleeved with a crankshaft heating belt (31).
8. The air-source heat pump cold-warm-hot water system according to claim 1, characterized in that: a heat exchange fan (8) is installed on one side of the fin heat exchanger (7), and a chassis heating belt (71) is arranged at the bottom of the fin heat exchanger (7).
9. The air-source heat pump cold-warm-hot water system according to claim 1, characterized in that: and a pressure element (15) and/or a temperature sensor (16) are/is arranged between the compressor (3) and the hot water heat exchanger (4) and on an inlet or outlet pipeline of the vapor-liquid separator (2).
10. The air-source heat pump cold-warm-hot water system according to claim 1, characterized in that: temperature sensors are arranged between the cooling-heating heat exchanger (6) and the first filter (72) and between the second filter (74) and the fin heat exchanger (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320132487.3U CN218884312U (en) | 2023-02-06 | 2023-02-06 | Air source heat pump changes in temperature hot-water heating system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320132487.3U CN218884312U (en) | 2023-02-06 | 2023-02-06 | Air source heat pump changes in temperature hot-water heating system |
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| CN218884312U true CN218884312U (en) | 2023-04-18 |
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| CN202320132487.3U Active CN218884312U (en) | 2023-02-06 | 2023-02-06 | Air source heat pump changes in temperature hot-water heating system |
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Address after: C301, Building 4, No. 1669, North Section of Huoli Avenue, Cihu High tech Zone, Ma'anshan City, Anhui Province, 243000 Patentee after: Ma'anshan Corona Technology Co.,Ltd. Address before: C301, Building 4, No. 1669, North Section of Huoli Avenue, Cihu High tech Zone, Ma'anshan City, Anhui Province, 243000 Patentee before: Ma'anshan noca Technology Co.,Ltd. |
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