CN210345611U - Efficient heating heat source equipment - Google Patents
Efficient heating heat source equipment Download PDFInfo
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- CN210345611U CN210345611U CN201921339694.6U CN201921339694U CN210345611U CN 210345611 U CN210345611 U CN 210345611U CN 201921339694 U CN201921339694 U CN 201921339694U CN 210345611 U CN210345611 U CN 210345611U
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Abstract
The utility model provides a high-efficient heating heat source equipment, include: the heat exchanger comprises a shell, a compressor, a finned heat exchanger, a four-way reversing valve, a first throttling device, a filter, an energy storage and heat preservation water tank, an electric heating rod, a circulating water pump, an air supply heat exchanger, a second throttling device and a three-way valve, wherein a circulating water inlet and a circulating water outlet are formed in the side end of the shell, and all the parts are correspondingly connected through pipelines. This high-efficient heating heat source equipment integrated level is high, and energy utilization is high, can carry out the heat exchange with main road refrigerant and auxiliary road refrigerant through setting up an tonifying qi heat exchanger, utilizes the accurate control fluid infusion volume of second expansion valve, spout into the endothermic refrigerant of evaporation that need not participate in main circulation system into tonifying qi heat exchanger through the second expansion valve and carry out the heat transfer with the medium temperature high pressure refrigerant of main circulation system, compare with the standard compressor of refrigerant, promoted the heating capacity, also promoted heating efficiency, heating system can operate energy-efficiently steadily.
Description
Technical Field
The utility model relates to a heating equipment technical field, concretely relates to high-efficient heating heat source equipment.
Background
At present, heating hot water systems are mainly divided into natural circulation heating hot water systems and mechanical circulation heating hot water systems. Wherein, the operating principle of the natural circulation heating hot water system is as follows: before the system operates, the whole system is filled with cold water, when the system works, the water is heated in the boiler, the density is reduced, the hot water rises along the water supply pipeline and flows into the radiator, the hot water in the radiator releases heat, the temperature is reduced, the density is increased, and the hot water flows back to the boiler along the water return pipeline. Although the natural circulation heating hot water system has simple device and convenient operation, the pipe diameter is larger and the initial investment is higher because the system has limited action pressure and small pipeline flow velocity. The working principle of the mechanical circulation heating hot water system is as follows: the forced circulation of the water pump is utilized, the flowing resistance of the water flow in the whole annular pipeline is overcome by the power provided by the water pump, and the lift of the water pump is mainly determined by the flow resistance. Because the circulating water pump is arranged, the action pressure generated by the water pump is very large, so that the heating range can be expanded, and the heating device can not only supply heat for a single building, but also supply heat for a plurality of buildings and areas, and is widely used. However, in the system, the energy storage and heat preservation water tank is not arranged in the host, so that the unit is frequently started, the service life of the unit is easily shortened, the operation cost is high, the water supply temperature is unstable, and the like. In addition, the heating heat source equipment on the existing market generally does not have the functions of air supplement and enthalpy increase, and the energy utilization rate is low.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the utility model provides a high-efficient heating heat source equipment through the energy storage holding water box who takes heating function in the setting up in the system, can provide reliable and stable heating medium temperature and give indoor set heating to through setting up the tonifying qi heat exchanger, heating capacity and efficiency when can effectively promote the low temperature.
In order to realize the technical scheme, the utility model provides a high-efficient heating heat source equipment, include: the heat exchanger comprises a shell, a compressor, a finned heat exchanger, a four-way reversing valve, a first throttling device, a filter, an energy storage heat preservation water tank, an electric heating rod, a circulating water pump, an air make-up heat exchanger, a second throttling device and a three-way valve, wherein a circulating water inlet and a circulating water outlet are formed in the side end of the shell, the circulating water inlet in the shell is connected with a circulating water inlet of the energy storage heat preservation water tank through a pipeline, a circulating water outlet of the energy storage heat preservation water tank is connected to a water inlet of the circulating water pump through a pipeline, a water outlet of the circulating water pump is connected with a circulating water outlet in the shell through a pipeline, the electric heating rod is installed in the energy storage heat preservation water tank, the compressor is installed in the shell, an air outlet of the compressor is connected to an air inlet of the four-way reversing valve through a pipeline, the third gas outlet of the four-way reversing valve is connected to the gas inlet of the compressor through a pipeline, the gas outlet of the finned heat exchanger is connected to the gas inlet of the first throttling device through a pipeline, the gas outlet of the first throttling device is connected with the liquid outlet of the air supplementing heat exchanger through a pipeline, the air supplementing port of the air supplementing heat exchanger is connected to the air supplementing port of the compressor through a pipeline, the first liquid inlet and the second liquid inlet of the air supplementing heat exchanger are respectively connected with the first interface and the second interface of the tee joint through pipelines, the second throttling device is installed on the pipeline connected with the second liquid inlet of the tee joint second interface and the air supplementing heat exchanger, the third interface of the tee joint is connected with the inlet of the filter, and the outlet of the filter is connected to the.
In the above technical scheme, the actual working process includes a heating mode and a defrosting mode:
heating mode work flow: the refrigerant is compressed into high-temperature high-pressure gas by a compressor, the high-temperature high-pressure gas is conveyed to an energy storage heat preservation water tank through path adjustment of a four-way reversing valve to exchange heat with a heating medium, the gas refrigerant emits heat and is condensed into a medium-temperature high-pressure liquid refrigerant, the medium is heated to obtain the heating medium with corresponding temperature, the liquid supplementing amount is accurately controlled by a second throttling device, the refrigerant which does not need to participate in the evaporation and heat absorption of a main circulating system is sprayed into a gas supplementing heat exchanger to exchange heat with the medium-temperature high-pressure refrigerant of the main circulating system, the refrigerant absorbs heat and is gasified into gas, the gas enters a middle cavity of the compressor and is compressed into the high-temperature high-pressure gas together with the refrigerant gas returned from a gas return port, so that the gas return amount is increased, the exhaust temperature of the compressor is, therefore, compared with a standard compressor of a refrigerant, the heat production quantity is improved, and the heating efficiency is also improved. The refrigerant of the main circulating system is changed into a supercooled liquid refrigerant after exchanging heat with the air supplementing refrigerant controlled by the second expansion valve through the air supplementing heat exchanger, the supercooled liquid refrigerant is converted into a low-temperature low-pressure liquid refrigerant through the first throttling device of the main circulating system, the low-temperature low-pressure liquid refrigerant enters the fin heat exchanger for heat exchange, the liquid refrigerant absorbs heat and is gasified into a low-temperature low-pressure gaseous refrigerant, the gaseous refrigerant is sucked by the compressor and is compressed into a high-temperature high-pressure gaseous refrigerant again, and the heating cycle. The circulating water pump continuously conveys the heating medium to the energy storage heat preservation water tank for heat exchange, the waterway system continuously and circularly operates, and the equipment is more reliable in operation.
Defrosting mode work flow: the refrigerant is compressed into high-temperature high-pressure gas by a compressor, the high-temperature high-pressure gas is conveyed to a fin heat exchanger through path adjustment of a four-way reversing valve and exchanges heat with a medium, the gas refrigerant emits heat and is condensed into medium-temperature high-pressure liquid refrigerant, the medium-temperature high-pressure liquid refrigerant is converted into low-temperature low-pressure liquid refrigerant through a first throttling device and enters an air supplementing heat exchanger, heat exchange is not carried out at the moment, the medium-temperature low-pressure liquid refrigerant enters an energy storage heat preservation water tank for heat exchange, the liquid refrigerant absorbs heat and is gasified into low-temperature low-pressure gas refrigerant, the gas refrigerant is sucked by the compressor and is compressed into high-temperature high-pressure gas refrigerant again, refrigeration circulation is carried out.
Preferably, the frequency converter is installed to the shell body inboard, frequency converter and compressor electric connection can control the function that the compressor realized the frequency conversion through the frequency converter to energy saving consumes.
Preferably, the shell wraps the compressor, the four-way reversing valve, the finned heat exchanger, the throttling device, the filter, the energy storage and heat preservation water tank, the circulating water pump, the air supply heat exchanger and the second throttling device, so that the protection of the components can be enhanced, and the appearance of the device is more attractive and neat.
Preferably, the energy storage heat preservation water tank is provided with a temperature measuring hole, and a temperature detector is inserted into the temperature measuring hole, so that the temperature in the energy storage heat preservation water tank can be monitored in real time.
Preferably, install automatic vent valve and relief valve on the energy storage holding water tank, automatic vent valve's effect is the inside air of automatic discharge energy storage holding water tank, and the effect of relief valve is when energy storage holding water tank internal pressure is too big, automatic pressure reduction, protective water tank.
Preferably, the front side of the finned heat exchanger is provided with a fan blade driven by a motor, so that the heat exchange effect can be effectively enhanced.
Preferably, the gas supplementing heat exchanger is a plate heat exchanger, a double-pipe heat exchanger or a shell-and-tube heat exchanger.
Preferably, the first throttling device and the second throttling device are both electronic expansion valves, and a thermal expansion valve and a capillary tube can also be used for replacing the electronic expansion valves.
The utility model provides a pair of high-efficient heating heat source equipment's beneficial effect is:
1) this high-efficient heating heat source equipment integrated level is high, and energy utilization is high, can carry out the heat exchange with main road refrigerant and auxiliary road refrigerant through setting up an tonifying qi heat exchanger, ensures to get back to what the compressor is low temperature low pressure gaseous state refrigerant, can strengthen the return air volume of compressor simultaneously, plays the effect that the tonifying qi increases the enthalpy to heat quantity and efficiency when promoting the low temperature have enlarged the restriction in ambient temperature scope and region of using.
2) The efficient heating heat source equipment can realize uninterrupted efficient energy-saving environment-friendly provision of stable heating medium temperature for indoor heating equipment in winter through the arrangement of the built-in energy storage and heat preservation water tank.
3) This high-efficient heating heat source equipment is through setting up the energy storage holding water box of taking the heating function to can realize the hydrologic cycle in the energy storage holding water box, can provide reliable and stable heating medium temperature and give indoor set heating, whole heating system can be energy-efficient operate steadily.
4) Under the working condition of low temperature in winter, the enhanced vapor injection technology is adopted, compared with a standard compressor of a refrigerant, the heating quantity is improved, and the heating efficiency is also improved; the phenomenon that the pressure is low even low-pressure protection is avoided when the unit is started; the exhaust temperature of the compressor is accurately controlled, the exhaust temperature is prevented from being too high, and the service life of the compressor is prolonged.
Drawings
Fig. 1 is a schematic view of the structural connection of the present invention.
In the figure: 1. a housing; 2. a temperature measuring hole; 3. electrically heating; 4. an energy storage and heat preservation water tank; 5. a water circulating pump; 6. a finned heat exchanger; 7. a circulating water inlet; 8. a circulating water outlet; 9. a compressor; 10. a power supply junction box; 11. a refrigeration system pipeline; 12. a four-way reversing valve; 13. a first throttling device; 14. a filter; 15. a frequency converter; 16. an automatic exhaust valve; 17. a pressure relief valve; 18. a water system pipeline; 19. a motor fan blade; 20. a motor; 21. a gas supplementing heat exchanger; 22. a second throttling device; 23. and a tee joint.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art without any inventive step are within the scope of the present invention.
Example 1: a high-efficiency heating heat source device.
Referring to fig. 1, an efficient heating heat source apparatus includes: the device comprises a shell 1, a compressor 9, a four-way reversing valve 12, a finned heat exchanger 6, a first throttling device 13, a filter 14, an energy storage heat preservation water tank 4, a circulating water pump 5, an air supplementing heat exchanger 21, a second throttling device 22 and a tee 23, wherein the shell 1 wraps the compressor 9, the four-way reversing valve 12, the finned heat exchanger 6, the first throttling device 13, the filter 14, the energy storage heat preservation water tank 4, the circulating water pump 5, the air supplementing heat exchanger 21, the second throttling device 22 and the tee 23, so that the protection of the components can be enhanced, the device can be more attractive and tidy in appearance, a circulating water inlet 7 and a circulating water outlet 8 are arranged at the side end of the shell 1, the circulating water inlet 7 on the shell 1 is connected with a circulating water inlet of the energy storage heat preservation water tank 4 through a pipeline, a circulating water outlet of the energy storage heat preservation, the water outlet of the circulating water pump 5 is connected with a circulating water outlet 8 on the shell 1 through a pipeline, an electric heating rod 3 is installed in the energy storage heat preservation water tank 4, the compressor 9 is installed in the shell 1, an air outlet of the compressor 9 is connected with an air inlet of a four-way reversing valve 12 through a pipeline, a normally open first air outlet of the four-way reversing valve 12 is connected with an air inlet of the finned heat exchanger 6 through a pipeline, a second air outlet of the four-way reversing valve 12 is connected with an air inlet of the energy storage heat preservation water tank 4 through a pipeline, a third air outlet of the four-way reversing valve 12 is connected with an air inlet of the compressor 9 through a pipeline, an air outlet of the finned heat exchanger 6 is connected with an air inlet of a first throttling device 13 through a pipeline, an air outlet of the first throttling device 13 is connected with a liquid outlet of, the first liquid inlet and the second liquid inlet of the air supplementing heat exchanger 21 are respectively connected with a first interface and a second interface of a tee 23 through pipelines, a second throttling device 22 is installed on the pipeline connecting the second interface of the tee 23 with the second liquid inlet of the air supplementing heat exchanger 21, a third interface of the tee 23 is connected with an inlet of a filter 14, an outlet of the filter 14 is connected with an air inlet at the bottom of an energy storage heat preservation water tank 4 through a pipeline, a frequency converter 15 is installed on the inner wall of a shell 1 and is electrically connected with a compressor 9, a power supply junction box 10 is installed on the outer side of the shell 1 and is used for supplying power to the outside, a temperature measurement hole 2 is arranged on the energy storage heat preservation water tank 4, a temperature detector is inserted in the temperature measurement hole 2 and can monitor the temperature in the energy storage heat preservation water tank 4 in real time, an automatic exhaust valve 16 and a pressure release valve 17 are installed on, the pressure relief valve 17 is used for automatically reducing pressure and protecting the water tank when the internal pressure of the energy storage heat preservation water tank 4 is too high, in the embodiment, the fan blade 19 driven by the motor 20 is installed on the front side of the finned heat exchanger 6, the heat exchange effect can be effectively enhanced, the air supplementing heat exchanger 21 is a plate type heat exchanger, and the first throttling device 13 and the second throttling device 22 are electronic expansion valves.
The functions of the components in this embodiment are as follows:
the function of the housing 1 is to protect the components mounted in the housing 1 and to make the device more attractive and neat in appearance. The temperature measuring hole 2 is used for placing a temperature sensing probe. The electric heating rod 3 is used for converting electric energy into heat energy and continuously generating heat to heat the heating medium in the energy storage heat preservation water tank 4. The energy storage and heat preservation water tank 4 is used for storing heating media required by heating, preserving heat and storing sufficient heat sources to supply the units for defrosting. The circulating water pump 5 is used for completing the water circulation of the heating medium in the energy storage heat preservation water tank 4 and the indoor heating fin heat exchanger. The fin heat exchanger 6 is used for heat exchange between a refrigerant in the refrigeration system and an air heat source, namely absorbing heat from the air heat source. The circulating water inlet 7 and the circulating water outlet 8 are used for realizing the connection of the device with the outside. The compressor 9 is used for completing the air suction and exhaust process and providing power for realizing the Carnot cycle and the reverse Carnot cycle. The power supply junction box 10 functions to connect the device to an external power supply. The refrigeration system pipeline 11 is used for connecting various components of the refrigeration system. The four-way reversing valve 12 is used for switching the path trend of the refrigerant, and realizing the switching between the refrigeration mode and the heating mode. The first throttling means 13 is used to convert the gaseous refrigerant of the main circulation system into a liquid refrigerant or to convert the liquid refrigerant of the main circulation system into a gaseous refrigerant. The filter 14 functions to filter foreign substances in the refrigeration system and protect the first throttling device 13. The frequency converter 15 is used for controlling the compressor 9 to realize the frequency conversion function. The automatic exhaust valve 16 is used for automatically exhausting the air inside the energy storage heat preservation water tank 4. The pressure relief valve 17 is used for automatically reducing the pressure and protecting the water tank when the internal pressure of the energy storage heat preservation water tank 4 is overlarge. The water system pipeline 18 is used for connecting various parts of the water path system. The fan blades 19 are used for realizing the directional flow of wind and promoting the effective heat exchange between the air heat source and the fin heat exchanger 6. The motor 20 is used for realizing high-speed operation of the fan blade 19 and providing operation power for the fan blade. The air-supplementing heat exchanger 21 is used for exchanging heat between the main refrigerant and the auxiliary refrigerant, so that the low-temperature and low-pressure gas refrigerant returning to the compressor 9 is ensured, the air return quantity of the compressor 9 can be increased, the air-supplementing and enthalpy-increasing effects are achieved, and the heating capacity and the energy efficiency at low temperature are improved. The second throttling means 22 functions to convert the gaseous refrigerant of the auxiliary circulation system into a liquid refrigerant or to convert the liquid refrigerant of the auxiliary circulation system into a gaseous refrigerant. The tee joint 23 is used for realizing branch connection of the main circulation system and the auxiliary circulation system.
In this embodiment, the actual working process includes a heating mode and a defrosting mode:
heating mode work flow: the refrigerant 9 is compressed into high-temperature high-pressure gas by a compressor, the high-temperature high-pressure gas is conveyed to the energy-storage heat-preservation water tank 4 through path adjustment of the four-way reversing valve 12 to exchange heat with a heating medium, the heat released by a gaseous refrigerant is condensed into a medium-temperature high-pressure liquid refrigerant, the medium is heated to obtain a heating medium with a corresponding temperature, the amount of liquid supplement is accurately controlled by using the second throttling device 22, the refrigerant which does not need to participate in evaporation and heat absorption of the main circulating system is sprayed into the air supplement heat exchanger 21 to exchange heat with the medium-temperature high-pressure refrigerant of the main circulating system, the refrigerant enters an intermediate cavity of the compressor 9 after absorbing heat and being gasified into gas, the gas and the refrigerant gas returned from an air return port are compressed into high-temperature high-pressure gas together, so that the gas return amount, obviously improves the evaporation pressure, thereby improving the heating quantity and the heating efficiency compared with the standard compressor of the refrigerant. The refrigerant of the main circulation system is changed into a supercooled liquid refrigerant after exchanging heat with the air supplement refrigerant controlled by the second expansion valve 21 through the air supplement heat exchanger 22, the supercooled liquid refrigerant is converted into a low-temperature low-pressure liquid refrigerant through the first throttling device 13 of the main circulation system, the low-temperature low-pressure liquid refrigerant enters the fin heat exchanger for heat exchange, the liquid refrigerant absorbs heat and is gasified into a low-temperature low-pressure gaseous refrigerant, the gaseous refrigerant is sucked by the compressor, and is compressed into a high-temperature high-pressure gaseous refrigerant again, and the. The circulating water pump continuously conveys the heating medium to the energy storage heat preservation water tank for heat exchange, the waterway system continuously and circularly operates, and the equipment is more reliable in operation.
Defrosting mode work flow: the refrigerant is compressed into high-temperature high-pressure gas by the compressor 9, the high-temperature high-pressure gas is conveyed to the fin heat exchanger 6 through path adjustment of the four-way reversing valve 12 to exchange heat with a medium, the gas refrigerant emits heat and is condensed into medium-temperature high-pressure liquid refrigerant, the medium-temperature high-pressure liquid refrigerant is converted into low-temperature low-pressure liquid refrigerant through the first throttling device 13 and enters the air supplementing heat exchanger, heat exchange is not performed at the moment, the medium enters the energy storage heat preservation water tank 4 to exchange heat, the liquid refrigerant absorbs heat and is gasified into low-temperature low-pressure gas refrigerant, the gas refrigerant is sucked by the compressor 9 and is compressed into high-temperature high-pressure gas refrigerant again, refrigeration cycle is performed continuously, the heating medium is conveyed to the energy storage heat.
The high-efficiency heating heat source equipment has high integration level and high energy utilization rate, and can realize the switching of heating and defrosting functions by switching the four-way reversing valve 12. The main path refrigerant and the auxiliary path refrigerant can exchange heat by arranging the air supplementing heat exchanger 21, so that low-temperature and low-pressure gaseous refrigerant returning to the compressor 9 is ensured, the air return quantity of the compressor 9 can be increased, the effects of supplementing air and increasing enthalpy are achieved, the heating quantity is improved, and the heating efficiency is also improved; the phenomenon that the pressure is low even low-pressure protection is avoided when the unit is started; the exhaust temperature of the compressor is accurately controlled, the exhaust temperature is prevented from being too high, the service life of the compressor is prolonged, and the limitation of the use environment temperature range and the region is enlarged. By arranging the built-in energy storage and heat preservation water tank 4, the stable heating medium temperature can be provided for indoor heating equipment in a long-time uninterrupted, efficient, energy-saving and environment-friendly manner in winter. In addition, by arranging the energy storage heat preservation water tank 4 with the heating function and realizing the water circulation in the energy storage heat preservation water tank 4, stable and reliable heating medium temperature can be provided for the indoor unit for heating, and the whole heating system can operate efficiently, energy-saving and stably.
The above description is a preferred embodiment of the present invention, but the present invention should not be limited to the disclosure of the embodiment and the accompanying drawings, and therefore, all equivalents and modifications that can be accomplished without departing from the spirit of the present invention are within the protection scope of the present invention.
Claims (8)
1. An efficient heating heat source device, characterized by comprising: the heat exchanger comprises a shell, a compressor, a finned heat exchanger, a four-way reversing valve, a first throttling device, a filter, an energy storage heat preservation water tank, an electric heating rod, a circulating water pump, an air make-up heat exchanger, a second throttling device and a three-way valve, wherein a circulating water inlet and a circulating water outlet are formed in the side end of the shell, the circulating water inlet in the shell is connected with a circulating water inlet of the energy storage heat preservation water tank through a pipeline, a circulating water outlet of the energy storage heat preservation water tank is connected to a water inlet of the circulating water pump through a pipeline, a water outlet of the circulating water pump is connected with a circulating water outlet in the shell through a pipeline, the electric heating rod is installed in the energy storage heat preservation water tank, the compressor is installed in the shell, an air outlet of the compressor is connected to an air inlet of the four-way reversing valve through a pipeline, the third gas outlet of the four-way reversing valve is connected to the gas inlet of the compressor through a pipeline, the gas outlet of the finned heat exchanger is connected to the gas inlet of the first throttling device through a pipeline, the gas outlet of the first throttling device is connected with the liquid outlet of the air supplementing heat exchanger through a pipeline, the air supplementing port of the air supplementing heat exchanger is connected to the air supplementing port of the compressor through a pipeline, the first liquid inlet and the second liquid inlet of the air supplementing heat exchanger are respectively connected with the first interface and the second interface of the tee joint through pipelines, the second throttling device is installed on the pipeline connected with the second liquid inlet of the tee joint second interface and the air supplementing heat exchanger, the third interface of the tee joint is connected with the inlet of the filter, and the outlet of the filter is connected to the.
2. The efficient heating heat source apparatus according to claim 1, wherein: the shell body inboard is installed the converter, converter and compressor electric connection.
3. The efficient heating heat source apparatus according to claim 1, wherein: the shell wraps the compressor, the four-way reversing valve, the finned heat exchanger, the throttling device, the filter, the energy storage and heat preservation water tank, the circulating water pump, the air supply heat exchanger and the second throttling device.
4. The efficient heating heat source apparatus according to claim 1, wherein: the energy storage heat preservation water tank is provided with a temperature measuring hole, and a temperature detector is inserted into the temperature measuring hole.
5. The efficient heating heat source apparatus according to claim 1, wherein: and an automatic exhaust valve and a pressure release valve are arranged on the energy storage heat preservation water tank.
6. The efficient heating heat source apparatus according to claim 1, wherein: and fan blades driven by a motor are installed on the front side of the finned heat exchanger.
7. The efficient heating heat source apparatus according to claim 1, wherein: the air supply heat exchanger is a plate heat exchanger, a sleeve type heat exchanger or a shell and tube type heat exchanger.
8. The efficient heating heat source apparatus according to claim 1, wherein: the first throttling device and the second throttling device are both electronic expansion valves, thermal expansion valves or capillary tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921339694.6U CN210345611U (en) | 2019-08-19 | 2019-08-19 | Efficient heating heat source equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921339694.6U CN210345611U (en) | 2019-08-19 | 2019-08-19 | Efficient heating heat source equipment |
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| CN210345611U true CN210345611U (en) | 2020-04-17 |
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| CN201921339694.6U Active CN210345611U (en) | 2019-08-19 | 2019-08-19 | Efficient heating heat source equipment |
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