CN109812951B - Synergistic system device for medium-low grade heat in exhaust air of direct-current air conditioner containing harmful medium - Google Patents
Synergistic system device for medium-low grade heat in exhaust air of direct-current air conditioner containing harmful medium Download PDFInfo
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Abstract
The invention discloses a synergy system device of direct-current air conditioner containing medium and low grade heat in exhaust, which comprises an air source heat pump, a decoupling air inlet device, a windshield and an exhaust mechanism, wherein the air source heat pump is connected with an exhaust main pipe of the direct-current air conditioner. The decoupling air inlet device comprises an air inlet main pipe connected with the air exhaust main pipe and a plurality of air inlet branch pipes connected with the air inlet main pipe, and the air outlet air flow of each air inlet branch pipe is aligned to the surface of the heat exchanger of the air source heat pump; the windshields are arranged at both sides of the air source heat pump and at the air outlets of the air inlet branch pipes; the exhaust mechanism comprises an exhaust fan arranged on an exhaust hole of the air source heat pump and an exhaust cylinder arranged on the exhaust hole according to the exhaust requirement, and the height of the exhaust cylinder is 0.5-1.5 m. The synergistic system device can effectively recover the medium-low grade heat in exhaust air of the direct-current air conditioner containing harmful media, improve the operation efficiency of the heat pump unit and reduce the energy consumption of the direct-current air conditioner.
Description
Technical Field
The invention relates to a synergistic system device of medium and low grade heat in exhaust air of a direct-current air conditioner containing harmful media.
Background
There are a large number of sources of harmful medium in the room for process, such as a large amount of harmful dust, volatile gas, organic solvent, ammonia, etc., and in order to avoid cross contamination, the specification or standard prescribes that the indoor air is not allowed to be used as return air. The full fresh air full exhaust direct-current air conditioning system is adopted, and the energy consumption is extremely high although the indoor environment can be effectively controlled.
Such as air-borne pathogenic biological agents operating in high-level biosafety laboratories, which are highly dangerous to the human body, animals and plants or to the environment, are factors that cause serious or even fatal diseases to be transmitted by humans mainly through aerosols, or are highly dangerous to animals and plants and the environment. Some, if not all, have preventive and therapeutic measures.
Such as ward for patients with severe air-borne diseases (such as atypical pneumonia, open tuberculosis, drug-resistant tuberculosis, measles, varicella, and suspected air-borne diseases with more than one transmission path or unknown etiology, etc.) which are easily and directly or indirectly transmitted from person to person in the negative pressure isolation ward, and even transmitted by microorganisms which have not been found or declared to be eliminated in China, and special operating rooms and diagnosis rooms of the patients, and the infectious disease department in the comprehensive hospital is used for receiving an observation room and an emergency treatment room for examining suspected air-borne patients.
Various experimental animals are raised in the experimental animal house, and a large amount of metabolites such as ammonia and the like can be generated in the breeding, production and experimental processes of the experimental animals, so that the indoor environment is polluted, and the breeding, production and experimental processes of the experimental animals are influenced.
Such as a large number of laboratories in various fields, and when the laboratory exhaust cabinet is used for operating harmful and toxic chemical solvents, infectious materials, high-concentration acid-base harmful gases and other experimental objects.
The indoor air of the above-mentioned type of house contains a large quantity of harmful substances, or the cost of harmful substance treatment is far higher than that of fresh air conditioning treatment, and the air conditioning system does not allow return air, only adopts a direct current system with full fresh air and full exhaust air, and the discharged air is the air of the indoor air conditioner. Direct emissions can severely contaminate or harm the surrounding environment and the residents. Some requirements are that the exhaust treatment device is adopted to discharge after harmless treatment, and some requirements are higher than a roof by a certain height or a certain wind speed is used for injecting a large amount of surrounding air to dilute and then discharge at high altitude.
Such rooms are often kept at a negative pressure in order to prevent the harmful substances from exuding. The greater the harmful hazard factors, the higher the negative pressure, and the greater the exhaust amount is. Some rooms use a direct-current variable-air-volume air conditioning system, and the air exhaust volume is correspondingly changed. In addition, the total heat recovery device is not generally adopted in the exhaust air in consideration of the fact that some leakage always exists in the total heat recovery process of fresh air and exhaust air. Some of the heat recovery devices such as the intermediate heat recovery coil of fig. 1 (prefilter 11, final filter 12, cooling coil 13, intermediate heat recovery coil 14, blower pipe 20, room 100, return fan 21) or the heat recovery device such as the heat pipe of fig. 2 are allowed to perform sensible heat recovery, but the recovery efficiency is not high, particularly in the southern area. Some utility houses are not provided with any heat recovery device by plain text in the standard or specification. Therefore, the air conditioner of the house has extremely high energy consumption.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a synergy system device for medium and low grade heat in exhaust air of a direct-current air conditioner containing harmful media, which can effectively recycle the medium and low grade heat in the exhaust air of the air conditioner containing the harmful media, improve the operation efficiency of a heat pump unit and indirectly reduce the energy consumption of a direct-current air conditioning system.
The purpose of the invention is realized in the following way: a synergistic system device of direct-flow air conditioner containing harmful medium exhaust medium low-grade heat comprises an air source heat pump, a decoupling air inlet device, a windshield and an exhaust mechanism, wherein the air source heat pump is connected with an exhaust main pipe of the direct-flow air conditioner; the air source heat pump comprises a heat pump box body and a heat exchanger which is arranged in the heat pump box body in an inclined mode; the surface of the heat pump box body opposite to the heat exchanger and the side surface of the heat exchanger are provided with air inlets; wherein, the liquid crystal display device comprises a liquid crystal display device,
the decoupling air inlet device is arranged on the base of the heat pump box body and comprises an air inlet main pipe connected with the air exhaust main pipe and a plurality of air inlet branch pipes connected with the air inlet main pipe, and the air outlet air flow of each air inlet branch pipe is aligned to the surface of a heat exchanger positioned in the heat pump box body;
the wind shield is arranged at the air inlet opposite to the side surface of the heat exchanger on the heat pump box body and the air outlet of each air inlet branch pipe, so that the air quantity sent out by each air inlet branch pipe cannot escape the heat pump box body due to the interference of the air gusts outside the unit, and the air quantity sent out by each air inlet branch pipe and the external air entering the heat pump box body from the air inlet opposite to the surface of the heat exchanger on the heat pump box body jointly form the ventilation quantity required by the air source heat pump;
the air exhaust mechanism comprises an exhaust fan arranged on an exhaust hole formed in a top plate of a heat pump box body of the air source heat pump and an exhaust cylinder arranged on the exhaust hole according to the air exhaust requirement, wherein the height of the exhaust cylinder is 0.5-1.5 m, and the exhaust cylinder is a straight cylinder or a conical cylinder with a small upper part and a large lower part.
The direct-flow air conditioner comprises a synergistic system device for medium and low grade heat in harmful medium exhaust, wherein a fin type heat exchanger is adopted as a heat exchanger in the air source heat pump, and the heat exchanger is of a corrugated windowing fin structure, and a heat exchange tube of the heat exchanger is an internal thread copper tube; the surface of the heat exchanger is provided with an anticorrosive coating with the thickness of 20-30 mu m corresponding to the corrosiveness of the harmful medium.
The direct-current air conditioner comprises a synergistic system device for medium and low grade heat in exhaust of harmful media, wherein each air inlet branch pipe of the decoupling air inlet device is provided with a plurality of air outlets, and each air outlet is provided with an air outlet grille.
The direct-current air conditioner comprises a synergistic system device for medium and low grade heat in exhaust of harmful media, wherein the exhaust mechanism further comprises a grid cover arranged at the top of the exhaust barrel, and the grid caliber of the grid cover is 20mm.
The direct-current air conditioner comprises a synergistic system device for medium and low grade heat in exhaust of harmful media, wherein the air quantity of the exhaust fan is 18500m 3 /h～20000m 3 And/h, the wind pressure is 100 Pa-120 Pa.
The synergy system device for the direct-current air conditioner containing the medium and low-grade heat in the exhaust of the harmful medium has the advantages of simple structure, novel conception and low cost, improves the operation efficiency of the heat pump unit, solves the problem of mismatching of the exhaust amount of the direct-current air conditioner system and the operation air quantity of the air source heat pump unit, simplifies the exhaust system of the direct-current air conditioner, reduces the power of an exhaust fan of the direct-current air conditioner, reduces the operation energy consumption and the heat emission of the whole system, is more beneficial to diffusion and dilution of the harmful substances in the exhaust of the direct-current air conditioner, and increases the harmlessness of the exhaust. The invention has the following characteristics:
1. according to the invention, the decoupling air inlet device is arranged between the air inlet of the air source heat pump and the air exhaust main pipe of the direct-current air conditioner, and the wind shield is arranged on the side surface of the air source heat pump and the air outlet of the decoupling air inlet device, so that the air exhaust volume of the direct-current air conditioner is not escaped, and the air exhaust volume of the direct-current air conditioner is not interfered by gusts. The decoupling air inlet device only inserts the air inlet branch pipe between the heat exchangers of the air source heat pumps and is directly connected with the air source heat pumps through non-pipelines, so that the problem that the air exhaust amount of the direct-current air conditioning system is not matched with the air exhaust amount required by the air source heat pumps is solved, the air exhaust amount required by the normal operation of the air source heat pumps can be met through air supplementing with minimum resistance through the atmosphere, and harmful substances in the air exhaust of the direct-current air conditioner can be diluted;
2. the heat exchange tube and the fins of the heat exchanger are correspondingly protected against the corrosiveness of harmful substances in exhaust air, and the structure of the heat exchanger is correspondingly optimized to compensate the heat exchange quantity attenuated by the protection treatment. In addition, in order to meet the requirement that the overall performance of the synergistic system device is not reduced, the structure of the heat exchanger is optimized so as to increase the heat exchange efficiency of the heat exchanger.
3. Aiming at the requirements of the exhaust height or the outlet wind speed of the direct-current air conditioner, a straight cylinder type or a cone cylinder type exhaust cylinder is added on an exhaust hole of the air source heat pump so as to meet the exhaust height or the exhaust speed required by regulations.
4. And an exhaust fan with high wind pressure is adopted, so that the increase of the resistance of the air flow flowing through the heat exchanger caused by the change of the structure or parts of the heat exchanger is overcome.
Drawings
FIG. 1 is a schematic diagram of a heat recovery device of a prior art intermediate heat recovery coil
FIG. 2 is a schematic diagram of a heat recovery device of a prior art heat pipe;
FIG. 3 is a schematic diagram of an embodiment of a synergistic system device (conical exhaust duct) for direct-current air conditioner containing low-grade heat in harmful medium exhaust;
FIG. 4 is a side view of FIG. 3;
FIG. 5 is a schematic diagram of another embodiment of a synergistic system device for direct current air conditioner containing low grade heat in harmful medium exhaust (right circular exhaust duct) according to the present invention;
FIG. 6a is a schematic diagram of a heat exchanger in a synergistic system device for direct-current air conditioner containing low-grade heat in harmful medium exhaust;
FIG. 6b is a left side view of FIG. 6 a;
fig. 6c is a right side view of fig. 6 a.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
Referring to fig. 3 to 5, the synergistic system device of the direct-current air conditioner containing medium and low-grade heat in exhaust of harmful media of the invention comprises an air source heat pump 3, a decoupling air inlet device, a windshield 4 and an exhaust mechanism, wherein the air source heat pump 3 is hard connected with an exhaust main pipe non-pipeline of the direct-current air conditioner system.
The air source heat pump 3 comprises a heat pump box body and a heat exchanger 30 arranged in the heat pump box body, wherein the heat exchanger 30 is arranged in the heat pump box body in an inclined mode of forming an included angle smaller than 90 degrees with a base of the heat pump box body; the heat exchanger 30 adopts a fin type heat exchanger, the fins 32 are of a corrugated windowing structure, and the heat exchange tube 33 of the heat exchanger 30 adopts an internal thread type copper tube; the surface of the heat exchanger 30 is provided with an anticorrosive coating with the thickness of 20-30 mu m; the anti-corrosion layer is formed after electrophoresis treatment; air inlets are formed on the front side plate, the rear side plate, the left side plate and the right side plate of the heat pump box body relative to the heat exchanger 30; the air inlets on the front and rear side plates of the heat pump box body of the embodiment are opposite to the side surfaces of the heat exchanger 30, and the air inlets on the left and right side plates of the heat pump box body are opposite to the surfaces of the heat exchanger 30.
The decoupling air inlet device is arranged on the base of the heat pump box body of the air source heat pump 3 and comprises an air inlet main pipe 6 connected with an air exhaust main pipe of the direct-current air conditioning system and a plurality of air inlet branch pipes 5 connected with the air inlet main pipe 6, and each air inlet branch pipe 5 is provided with a plurality of air outlets so as to be aligned with the surface of a heat exchanger 30 positioned in the heat pump box body; the air outlet of each air inlet branch pipe 5 is provided with an air outlet grille 7.
The windshields 4 are arranged on the air inlets of the heat pump box body opposite to the side surfaces of the heat exchanger and the air outlets of the air inlet branch pipes 5, the windshields 4 of the embodiment are arranged on the air inlets (opposite to the side surfaces of the heat exchanger 30) of the front side plate and the rear side plate of the heat pump box body, so that the air quantity sent by the air inlet branch pipes 5 does not escape the heat pump box body, and the air quantity sent by the air inlet branch pipes 5 and the external air entering the heat pump box body from the air inlets opposite to the surface of the heat exchanger on the heat pump box body jointly form the required ventilation quantity of the air source heat pump 3; outdoor air in this embodiment enters the heat pump box from air inlets (opposite to the surface of the heat exchanger 30) on the left and right side plates of the heat pump box.
The exhaust mechanism comprises an exhaust fan 2 arranged on an exhaust hole formed in a top plate of a heat pump box body of the air source heat pump 3, an exhaust cylinder 1 arranged on the top plate of the heat pump box body of the air source heat pump 3 corresponding to the exhaust hole of the air source heat pump 3, and a low-density grid cover (not shown in the figure) arranged on the top of the exhaust cylinder 1, wherein the grid caliber of the grid cover is 20mm; the exhaust fan 2 adopts a fan with large air volume and high residual pressure, and the air volume of the exhaust fan 2 is 18500m 3 /h～20000m 3 And/h, the wind pressure is 100 Pa-120 Pa; the air exhaust duct 1 has a height of 0.5-1.5 m and a conical shape with a small upper part and a large lower part so as to improve the air exhaust speed or has a straight cylindrical shape (see figure 5); can also be turned outwards at the top of the exhaust cylinder 1 (see figures 3 and 4), not only can reduce the air flow resistance, but also can enhance the strength of the straight cylinder。
The invention relates to a direct-current air conditioner which contains low-grade heat in exhaust of harmful medium, and the working principle of the synergistic system device is as follows: the exhaust air of the direct-current air conditioner is processed by an exhaust air processing device, enters the air inlet branch pipe 5 through the air inlet main pipe 6 of the decoupling air inlet device, is sent out by the air outlet grating 7 of the air inlet branch pipe 5, and then enters the heat exchanger 30 of the air source heat pump 3. Although the exhaust air quantity of the direct-current air conditioner is not matched with the ventilation quantity of the air source heat pump 3, the ventilation quantity required by the normal operation of the air source heat pump 3 can be met through the decoupling air inlet device and the external air supplementing air with the lowest resistance, and harmful substances in the exhaust air of the direct-current air conditioner are diluted. The wind shield 4 ensures that the exhaust of the direct-current air conditioner is free from the interference of the air-out gust, and the suction force of the exhaust fan 2 in the air source heat pump 3 effectively prevents the exhaust of the direct-current air conditioner from escaping, thereby improving the operation efficiency of the air source heat pump 3. The exhaust air entering the air source heat pump 3 flows through the heat exchanger 30 and the exhaust fan 2, the surfaces of which are subjected to protection treatment. The heat exchanger 30 and the exhaust fan 2 for protection treatment increase the corresponding capacity, ensure the operation efficiency and output of the air source heat pump 3, and finally exhaust the air into the atmosphere by the exhaust fan 1 at a certain height or a certain speed, thereby meeting the emission requirements regulated by regulations.
The invention relates to a synergy system device of direct-current air conditioner containing medium and low grade heat in exhaust air of harmful medium, which has the following characteristics:
1. because the exhaust air quantity of the direct-current air conditioner is not matched with the ventilation quantity of the air source heat pump 3, the exhaust air quantity of the direct-current air conditioner is smaller than the ventilation quantity of the air source heat pump 3, or the exhaust air quantity of the direct-current air conditioner is changed, if the exhaust air quantity of the direct-current air conditioner is completely absorbed and is not interfered by gusts of air, the air pipes are often connected in a hard mode, the ventilation quantity of the air source heat pump 3 cannot be met, and the efficiency of the air source heat pump 3 is affected. The invention sets decoupling air inlet device between the air inlet of the air source heat pump 3 and the air exhaust main pipe of the direct current air conditioner, which makes the air inlet of the air source heat pump 3 and the air exhaust main pipe of the direct current air conditioner be in non-pipeline hard connection, and sets wind shield 4 at the air outlet of the decoupling air inlet device, which not only ensures the air exhaust of the direct current air conditioner not to escape, but also can meet the ventilation quantity required by the normal operation of the air source heat pump 3 with the lowest resistance by the air supplementing of the atmosphere, and can dilute the harmful substances in the air exhaust of the direct current air conditioner;
2. because the exhaust air of the direct-current air conditioner contains corrosive substances such as ammonia, formaldehyde, acid and alkali, the exhaust air can corrode components such as a heat exchanger, an exhaust fan, a structural member and the like in the air source heat pump 3, and liquid such as water, acid, alkali and the like is sprayed to absorb or neutralize the components, so that the heat recovery efficiency is reduced. The invention aims at the characteristics of harmful substances in exhaust air to perform corresponding protection treatment on the heat exchange tube 33 and the fins 32 of the heat exchanger 30, and correspondingly optimizes the structure of the heat exchanger 30 so as to compensate the heat exchange quantity attenuated by the protection treatment. The exposed part of the heat exchanger 30 is protected, namely, the outer surface of the heat exchange tube 33 and the outer surface of the fin 32 are subjected to electrophoretic treatment to form an anti-corrosion layer. Because the flexible cationic epoxy polymer of the electrophoretic coating is uniformly distributed on the metal surface, the bridging phenomenon which can occur in the spraying treatment between the fins or the windows is avoided. The electrophoresis process ensures that the outer surface of the heat exchanger 30 forms a dry film-like corrosion preventing layer having a thickness of 20-30 μm. Electrophoresis meets ASTM B3359-97 standard, reaching 4B-5B adhesion grade; corrosion resistance can pass the salt spray test of ASTM G85A2 for no less than 2400 hours; the thermal decay performance is less than 2%. Since the electrophoresis treatment adopts a whole immersion method, the end plate 31 of the heat exchanger 30 is also subjected to the whole electrophoresis treatment, and has the same standard protection capability (see fig. 6a, 6b and 6 c).
In addition, considering that the heat exchange amount of the heat exchanger 30 is attenuated after the electrophoresis treatment, in order to meet the requirement that the overall performance of the synergistic system device is not reduced, the structure of the heat exchanger 30 is optimized: 1) Changing the conventional corrugated fin into a corrugated windowed fin structure; 2) The heat exchange copper pipe with the conventional light pipe structure is changed into the heat exchange copper pipe with the internal thread structure, so that the heat exchange area of the heat exchange pipe is increased.
3. Because the exhaust air of the direct-flow air conditioner contains high pathogenic microorganisms, although the direct-flow air conditioner is subjected to harmless treatment (such as filtration sterilization through a high-efficiency filter), the exhaust height (higher than a certain height of a roof) or the exhaust speed is regulated in the regulations, and the height of an exhaust outlet and the outlet wind speed of a common air source heat pump cannot meet the requirements of exhaust. The invention aims at the exhaust height and the outlet wind velocity requirements of a direct-current air conditioner, and an exhaust mechanism is added on an exhaust hole of an air source heat pump 3, namely an exhaust barrel 1 is added on the upper part of an exhaust fan 2. The height of the air discharge tube 1 is determined by the air discharge height required by regulations. The air exhaust tube 1 is made into a straight tube type or a cone type according to the requirement. The opening size of the conical air exhaust barrel 1 is determined according to the air exhaust speed required by regulations. After the exhaust fan 1 is added, a net cover on the exhaust fan 2 can be omitted, a low-density grid fan cover (the grid caliber is 20 mm) is added at the top of the exhaust fan 1, and even a plastic net rope with a similar shape is adopted to replace the grid cover, so that the overall wind resistance is reduced; meanwhile, as the diameter of the air exhaust barrel 1 is larger, the pressure drop generated for the air exhaust barrel 1 with the height of 0.5-1.5 m is small, and the extra pressure loss is hardly generated, so that the performance of the whole machine is hardly influenced.
4. Because the heat exchange quantity of the heat exchanger of the common air source heat pump, the air quantity and the air pressure of the exhaust fan are matched with the air source heat pump, the operation efficiency of the air source heat pump can be influenced by the change or performance reduction of any part, and the cold and hot water quantity and the water temperature required by the direct-current air conditioner can not be ensured. The invention not only adds the air exhaust barrel 1 on the exhaust hole of the air source heat pump 3, but also adopts the exhaust fan 2 with large air quantity and high residual pressure, thereby solving the problem of increasing the air quantity resistance flowing through the heat exchanger 30 caused by the change of the structure or parts of the heat exchanger 30.
The above embodiments are provided for illustrating the present invention and not for limiting the present invention, and various changes and modifications may be made by one skilled in the relevant art without departing from the spirit and scope of the present invention, and thus all equivalent technical solutions should be defined by the claims.
Claims (3)
1. A synergistic system device of direct-flow air conditioner containing harmful medium exhaust medium low-grade heat comprises an air source heat pump, a decoupling air inlet device, a windshield and an exhaust mechanism, wherein the air source heat pump is connected with an exhaust main pipe of the direct-flow air conditioner; the air source heat pump comprises a heat pump box body and a heat exchanger which is arranged in the heat pump box body in an inclined mode of forming an included angle smaller than 90 degrees with a base of the heat pump box body; air inlets are formed in the front side plate, the rear side plate and the left side plate of the heat pump box body relative to the heat exchanger, the air inlets in the front side plate and the rear side plate of the heat pump box body are opposite to the side surface of the heat exchanger, and the air inlets in the left side plate and the right side plate of the heat pump box body are opposite to the surface of the heat exchanger; the heat exchanger adopts a fin type heat exchanger and is of a corrugated windowed fin structure, and a heat exchange tube of the heat exchanger adopts an internal thread copper tube; the surface of the heat exchanger is provided with an anticorrosive coating with the thickness of 20-30 mu m corresponding to the corrosiveness of the harmful medium; it is characterized in that the method comprises the steps of,
the decoupling air inlet device is arranged on the base of the heat pump box body and comprises an air inlet main pipe connected with the air exhaust main pipe and a plurality of air inlet branch pipes connected with the air inlet main pipe, and each air inlet branch pipe is provided with a plurality of air outlets so as to be aligned with the surface of a heat exchanger positioned in the heat pump box body; the air outlets of the air inlet branch pipes are provided with air outlet grids;
the wind shields are arranged at the air inlets on the front side plate and the rear side plate which are opposite to the side surface of the heat exchanger on the heat pump box body and the air outlets of the air inlet branch pipes, so that the air quantity sent by the air inlet branch pipes can not be interfered by the air gusts outside the unit and can escape the heat pump box body, and the air quantity sent by the air inlet branch pipes and the air inlets on the left side plate and the right side plate which are opposite to the surface of the heat exchanger on the heat pump box body can jointly form the ventilation quantity required by the air source heat pump;
the air exhaust mechanism comprises an exhaust fan arranged on an exhaust hole formed in a top plate of a heat pump box body of the air source heat pump and an exhaust cylinder arranged on the exhaust hole according to the air exhaust requirement, wherein the height of the exhaust cylinder is 0.5-1.5 m, and the exhaust cylinder is a straight cylinder or a conical cylinder with a small upper part and a large lower part.
2. The synergistic system device for direct current air conditioner containing medium harmful medium exhaust medium low grade heat according to claim 1, wherein the exhaust mechanism further comprises a grid cover arranged at the top of the exhaust cylinder, and the grid caliber of the grid cover is 20mm.
3. The synergistic system device for direct current air conditioner containing harmful medium exhaust medium low grade heat as claimed in claim 1, wherein the air volume of the exhaust fan is 18500m 3 /h～20000m 3 And/h, the wind pressure is 100 Pa-120 Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910238044.0A CN109812951B (en) | 2019-03-27 | 2019-03-27 | Synergistic system device for medium-low grade heat in exhaust air of direct-current air conditioner containing harmful medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910238044.0A CN109812951B (en) | 2019-03-27 | 2019-03-27 | Synergistic system device for medium-low grade heat in exhaust air of direct-current air conditioner containing harmful medium |
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| Publication Number | Publication Date |
|---|---|
| CN109812951A CN109812951A (en) | 2019-05-28 |
| CN109812951B true CN109812951B (en) | 2024-02-09 |
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