CN205208816U - Air conditioning equipment - Google Patents
Air conditioning equipment Download PDFInfo
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- CN205208816U CN205208816U CN201521083276.7U CN201521083276U CN205208816U CN 205208816 U CN205208816 U CN 205208816U CN 201521083276 U CN201521083276 U CN 201521083276U CN 205208816 U CN205208816 U CN 205208816U
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 48
- 238000012545 processing Methods 0.000 claims abstract description 44
- 230000006835 compression Effects 0.000 claims abstract description 24
- 238000007906 compression Methods 0.000 claims abstract description 24
- 239000003507 refrigerant Substances 0.000 claims description 12
- 230000017525 heat dissipation Effects 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 238000005057 refrigeration Methods 0.000 claims description 5
- 230000005855 radiation Effects 0.000 claims description 2
- 230000008676 import Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 230000010354 integration Effects 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000036541 health Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
Abstract
The utility model relates to an air conditioning equipment relates to air conditioner technical field. The main technical scheme adopted is as follows: an air conditioning device comprises an air conditioner external unit, wherein the air conditioner external unit comprises a shell, a fresh air processing device and a compression heat exchange device. The shell is provided with a first cavity and a second cavity; and a fresh air inlet and a fresh air outlet which are used for communicating the first cavity are arranged on the shell. The fresh air processing device is arranged in the first cavity; the compression heat exchange device is arranged in the second cavity; wherein, fresh air processing apparatus is used for handling the new trend that gets into in the first cavity by the new trend import to carry the new trend after will handling to indoor by the new trend export. The utility model discloses mainly used provides one kind has the new trend and introduces and fresh air treatment function, and the new trend introduces controllable, integrated level height, compact structure, simple to operate's air conditioning equipment.
Description
Technical Field
The utility model relates to an air conditioning technology field especially relates to an air conditioning equipment with introduce new trend function.
Background
An air conditioner is a home appliance which is widely used to adjust the temperature of indoor air to provide a user with a suitable indoor environment. However, since the conventional air conditioning apparatus only circularly heats or cools indoor air during cooling or heating, and a user simultaneously closes doors and windows of a living room to maintain indoor temperature, the indoor air quality is gradually deteriorated, thereby adversely affecting the physical health of the user.
In order to improve the indoor air quality, the air conditioning equipment in the prior art is improved so as to adjust the indoor temperature and simultaneously introduce fresh air into the room. Specifically, for one-to-one air conditioning equipment, the introduction of fresh air into the room is mainly realized through the following improvement scheme at present:
firstly, install the fresh air mouth additional on indoor set, rely on the rotatory negative pressure that forms of fan blade to inhale indoor with outdoor new trend. However, this solution has the problem of small and uncontrollable fresh air volume.
Secondly, a special fan is arranged on the indoor unit to draw fresh air from the outdoor. However, this increases the size of the casing of the indoor unit and complicates the structure.
Thirdly, a ventilation device is installed to form linkage control with the air conditioning equipment. However, the design needs to be additionally specially provided with an air interchanger, and the technical problem of low integration level exists.
In addition, the three improvement schemes are that fresh air is directly led outdoors and is not subjected to cold and heat treatment, so that the indoor temperature is influenced, and the comfort is poor.
For multi-connected air conditioning equipment, the purpose of introducing fresh air into a room is generally realized by adopting a special fresh air processor in the prior art. Although the fresh air processor can pre-cool or pre-heat fresh air, the fresh air processor is specially installed, and the indoor fresh air processor is connected with the outdoor unit through the refrigerant pipe, so that the installation workload is large, and the installation is troublesome.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an air conditioning equipment, main aim at make air conditioning equipment have the new trend and introduce the function, and this air conditioning equipment's integrated level is high, compact structure, simple to operate.
In order to achieve the above object, the utility model mainly provides the following technical scheme:
on the one hand, the embodiment of the utility model provides an air conditioning equipment, air conditioning equipment includes the outer machine of air conditioner, its characterized in that, the outer machine of air conditioner includes:
a housing having a first cavity and a second cavity; the shell is provided with a fresh air inlet and a fresh air outlet which are used for communicating the first cavity;
the fresh air processing device is arranged in the first cavity;
the compression heat exchange device is arranged in the second cavity;
the fresh air processing device is used for processing fresh air entering the first cavity from the fresh air inlet and conveying the processed fresh air to the indoor from the fresh air outlet.
The purpose of the utility model and the technical problem thereof can be further realized by adopting the following technical measures.
Preferably, the fresh air processing device comprises a first heat exchanger for exchanging heat of fresh air entering the first cavity from the fresh air inlet.
Preferably, the compression heat exchange device comprises a compressor, a second heat exchanger and a four-way valve; wherein,
the compressor has an inlet for introducing low pressure refrigerant into the compressor, an outlet for outputting high pressure refrigerant;
one end of the first heat exchanger is provided with a first connector, and the other end of the first heat exchanger is provided with a second connector; one end of the second heat exchanger is provided with a first connector, and the other end of the second heat exchanger is provided with a second connector;
the first interface of the first heat exchanger and the first interface of the second heat exchanger are communicated through a pipeline;
and the second interface of the first heat exchanger and the second interface of the second heat exchanger are connected with the inlet and the outlet of the compressor through a four-way valve.
Preferably, when the fresh air entering the first cavity is subjected to heating treatment, the outlet of the compressor, the first heat exchanger, the second heat exchanger and the inlet of the compressor are sequentially communicated by controlling the four-way valve, so that a fresh air heating loop is formed;
when the fresh air entering the first cavity is subjected to refrigeration treatment, the outlet of the compressor, the second heat exchanger, the first heat exchanger and the inlet of the compressor are sequentially communicated by controlling the four-way valve, so that a fresh air refrigeration loop is formed.
Preferably, a throttle valve is arranged on a pipeline between the first interface of the first heat exchanger and the first interface of the second heat exchanger.
Preferably, the fresh air processing device comprises a filter screen, wherein the filter screen is arranged at a fresh air inlet in the first cavity so as to filter fresh air entering the first cavity from the fresh air inlet.
Preferably, the filter screen comprises one or two of an activated carbon filter screen and a HEPA filter screen.
Preferably, the compression heat exchange device further comprises a heat radiation fan;
the shell is provided with an air outlet used for being communicated with the second cavity, and the heat dissipation fan is arranged at the position, close to the air outlet, in the second cavity and used for performing heat dissipation treatment on the compression heat exchange device.
Preferably, the first cavity is located above the second cavity, and the air outlet communicated with the second cavity is located at a side portion of the housing.
Preferably, the fresh air processing device further comprises a fan, wherein the fan is arranged at an air outlet in the first cavity and used for introducing fresh air in the first cavity into the room; preferably, the fan is a volute fan.
Compared with the prior art, the utility model discloses an air conditioning equipment has following beneficial effect at least:
the embodiment of the utility model provides an air conditioning equipment is through designing out the integrated outer machine of air conditioner (or outdoor all-in-one) that has fresh air processing apparatus, compression heat transfer device, makes this air conditioning equipment have the new trend on the one hand and introduces and carry out the function handled the new trend. On the other hand, compared with the scheme in the prior art, the air conditioner external unit integrated with the fresh air processing device and the compression heat exchange device designed by the embodiment of the utility model has high integration level and compact structure; because new trend processing apparatus sets up outdoors, can also avoid new trend noise processing to indoor noise influence that produces. On the other hand, compare with prior art, owing to need not at indoor installation new trend processor alone, the indoor outside also need not to use the refrigerant union coupling, consequently, the utility model discloses air conditioning equipment simple to operate.
Further, the utility model discloses fresh air processing apparatus includes filter screen and heat exchanger to filter process and precooling or leading into again after the preheating process with the new trend indoor, not only improve user's travelling comfort, still improve indoor air quality, be favorable to user's health.
Further, the embodiment of the utility model provides an in the heat exchanger of fresh air processing apparatus by refrigerant union coupling to compress in the compressor loop among the heat transfer device, realize preheating or the purpose of precooling the new trend in the first cavity. The arrangement not only saves energy, but also further improves the integration level and the structure compactness of the air conditioning equipment.
Further, the embodiment of the utility model provides an outer machine of air conditioner is the design of side air-out for the outer machine of air conditioner saves and takes up an area of the space.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of an air conditioner external unit of an air conditioning apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a fresh air processing device according to an embodiment of the present invention;
fig. 3 is a heat exchange schematic diagram of the air conditioning equipment provided by the embodiment of the utility model for exchanging heat to the fresh air.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the intended purpose of the present invention, the following detailed description is given with reference to the accompanying drawings and preferred embodiments, in order to explain the detailed embodiments, structures, features and effects of the present invention. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Example 1
On the one hand, this embodiment provides an air conditioning equipment, and this air conditioning equipment can not only adjust indoor temperature, can also introduce indoor with outdoor new trend to improve indoor air quality. The air conditioning equipment of this embodiment mainly improves the outer machine of air conditioner, specifically, as shown in fig. 1, the outer machine of air conditioner of this air conditioning equipment includes casing, fresh air processing apparatus and compression heat transfer device. Wherein the shell has a first cavity 11 and a second cavity 12; and the shell is provided with a fresh air inlet 112 and a fresh air outlet 111 which are used for communicating the first cavity 11. The fresh air processing device is arranged in the first cavity 11. The compression heat exchange device is arranged in the second cavity 12. The fresh air processing device is used for processing fresh air entering the first cavity 11 from the fresh air inlet 112 and conveying the processed fresh air to the indoor space from the fresh air outlet 111.
As can be seen from the above, in the present embodiment, the air conditioner external unit of the air conditioner is composed of two parts, one part is an air conditioner external unit body (i.e., a compression heat exchange device, and when the air conditioner performs cooling, the compression heat exchange device is called a compression condensing device or a cooling system). The other part is a fresh air processing part which is mainly used for introducing outdoor fresh air into the room.
Preferably, the fresh air outlet in this embodiment is directly communicated with the indoor through an air pipe.
Preferably, the air conditioner external unit in the present embodiment is a side-outlet air conditioner external unit. Specifically, the side-outlet air conditioner external unit refers to an air conditioner external unit with a heat dissipation air outlet designed at a side of the housing. Preferably, the first cavity 11 in this embodiment is located above the second cavity 12. The shell is further provided with an air outlet 121 communicated with the second cavity 12, and the air outlet 121 is arranged on the side portion of the shell so as to be matched with a fan to dissipate heat of the compression heat exchange device. Preferably, the fresh air outlet 111 is disposed at the top of the housing, and the fresh air inlet 112 is disposed at the side of the housing.
The air conditioning equipment that this embodiment provided designs the outer machine of the integrated air conditioner (or outdoor all-in-one) that has new trend processing apparatus, compression heat transfer device through above-mentioned design, makes this air conditioning equipment have the new trend and introduces and handle the function to the new trend on the one hand. On the other hand, compared with the scheme in the prior art, the air conditioner external unit integrated with the fresh air processing device and the compression heat exchange device designed by the embodiment of the utility model has high integration level and compact structure; because new trend processing apparatus sets up outdoors, can also avoid new trend noise processing to indoor noise influence that produces. On the other hand, compare with prior art, owing to need not at indoor installation new trend processor alone, the indoor outside also need not to use the refrigerant union coupling, consequently, the utility model discloses air conditioning equipment simple to operate.
Example 2
Preferably, the present embodiment provides an air conditioning apparatus, as shown in fig. 1 and fig. 2, compared with the previous embodiment, the fresh air processing apparatus in the present embodiment mainly includes a first heat exchanger 22, a filter screen 21 and a fan 23.
The first heat exchanger 22 in this embodiment mainly performs heat exchange processing on the fresh air entering the first cavity 11 through the fresh air inlet 112, so as to preheat or precool the fresh air and then introduce the fresh air into the room, thereby improving the comfort in the room.
The filter screen 21 in this embodiment mainly filters the fresh air entering the first cavity 11 through the fresh air inlet 112 to improve the quality of the indoor air. The filter screen 21 in this embodiment is disposed at the fresh air inlet 112 of the first cavity 11, and closes the fresh air inlet. Preferably, the filter screen 21 in the present embodiment includes one or two of an activated carbon filter screen and a HEPA filter screen.
The fan 23 in this implementation is arranged in the first cavity 11 and is close to the position of the fresh air outlet 111, and the fan is not only used for introducing outdoor fresh air into the first cavity 11, but also conveying the fresh air of the first cavity 11 to the indoor. Preferably, the fan 23 is a volute fan, as shown in fig. 2 and 3, which includes a volute 24, a fan 23 and a motor 25.
Preferably, the heat exchanger 22 in the present embodiment is disposed at a position between the filter screen 21 and the fan 23. When the fresh air is treated, the fresh air entering the first cavity 11 is firstly filtered by the filter screen 21, the filtered fresh air is subjected to heat exchange treatment by the first heat exchanger 22, and finally the filtered fresh air is conveyed indoors by the fan.
The air conditioning equipment that this embodiment provided can introduce the new trend after filtration, heat transfer treatment indoor through above-mentioned setting, not only improves user's travelling comfort, still improves indoor air quality, is favorable to user's health.
Example 3
Preferably, compared with embodiment 2, the first heat exchanger of the fresh air processing device of this embodiment can be connected to the compressor loop of the compression heat exchange device to implement refrigeration and heating processing on fresh air.
Specifically, as shown in fig. 3, the compression heat exchange device includes a compressor 31, a second heat exchanger 32 (i.e., a condenser in an outdoor unit of an air conditioner), and a four-way valve 34. The compressor 31 has an inlet for introducing a low-pressure refrigerant into the compressor 31, and an outlet for outputting a high-pressure refrigerant. One end of the first heat exchanger 22 is provided with a first interface and the other end is provided with a second interface. One end of the second heat exchanger 32 is provided with a first interface, and the other end is provided with a second interface. The first port of the first heat exchanger 22 and the first port of the second heat exchanger 32 communicate with each other through a pipe. The second connection of the first heat exchanger 22 and the second connection of the second heat exchanger 32 are connected to the inlet and the outlet of the compressor 31 via a four-way valve 34.
Through the above arrangement, when the air conditioning equipment of the embodiment heats the fresh air entering the first cavity, the four-way valve 34 is controlled to reverse, so that the outlet of the compressor 31, the first heat exchanger 22, the second heat exchanger 32 and the inlet of the compressor 31 are sequentially communicated to form a fresh air heating loop.
When the air conditioning equipment of this embodiment refrigerates the fresh air introduced into the first cavity, the four-way valve 34 is controlled to change the direction, so that the outlet of the compressor 31, the second heat exchanger 32, the first heat exchanger 22, and the inlet of the compressor 31 are sequentially communicated to form a fresh air refrigerating loop.
Preferably, as shown in fig. 3, a throttle valve 33 is disposed on a pipeline between the first port of the first heat exchanger 22 and the first port of the second heat exchanger 32 in the present embodiment. Whether precooling or preheating is carried out to the new trend through setting up choke valve 33 to reach the degree of precooling or preheating and control, the user can adjust according to actual need like this.
In addition, as shown in fig. 1 and fig. 3, the compression heat exchanger further includes a heat dissipation fan, and the heat dissipation fan includes a fan blade 36 and a motor 35 for driving the fan blade to rotate. Correspondingly, the casing is provided with an air outlet 121 for communicating with the second cavity 12, and the heat dissipation fan is disposed in the second cavity 12 at a position close to the air outlet 121, so as to transport heat in the compression heat exchange device to the outside through the air outlet 121. Preferably, one side of the heat dissipation fan is disposed opposite to the second heat exchanger 32, and the other side is disposed opposite to the air outlet 121.
On the other hand, the utility model also provides a new trend introducing method, and this new trend introducing method adopts the air conditioning equipment that any above-mentioned embodiment provided to introduce indoor with outdoor new trend. The method comprises the following specific steps: and (4) processing the outdoor fresh air by adopting a fresh air processing device of an air conditioner external unit, and conveying the processed fresh air to the indoor space.
Preferably, the step of processing the outdoor fresh air by the fresh air processing device is specifically as follows: and the first heat exchanger is adopted to carry out heat exchange treatment on the fresh air entering the first cavity.
Preferably, when the first heat exchanger is used for heating the fresh air entering the first cavity, the four-way valve is controlled to enable the high-pressure refrigerant output by the outlet of the compressor to flow through the first heat exchanger through the pipeline to be condensed and released heat so as to heat the fresh air in the first cavity.
Preferably, when the first heat exchanger is used for refrigerating the fresh air entering the first cavity, the four-way valve is controlled to enable the high-pressure refrigerant output by the compressor to flow through the second heat exchanger for condensation and heat release, and then flow through the first heat exchanger for evaporation and heat absorption so as to refrigerate the fresh air in the first cavity.
Preferably, before the step of performing heat exchange processing on the fresh air entering the first cavity by using the first heat exchanger, the method further comprises the step of performing filtering processing on the fresh air entering the first cavity by using a filter screen.
To sum up, the embodiment of the utility model provides an air conditioning equipment and new trend introducing method, on one hand can satisfy the user's needs and carry out precooling or preheating to the new trend that gets into the room; on the other hand, the fresh air processing device is integrated on the air conditioner external unit, so that fresh air processing is completely carried out outdoors, and noise cannot be generated indoors. On the other hand, the air conditioning equipment with the fresh air introducing function is high in integration level, compact in structure and convenient to install, the fresh air volume and the fresh air temperature can be controlled, distribution of a plurality of rooms can be carried out after the fresh air is introduced, and the practicability is high.
The person skilled in the art will readily understand that the advantageous ways described above can be freely combined, superimposed without conflict.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention
Claims (10)
1. An air conditioning equipment, air conditioning equipment includes outer machine of air conditioner, its characterized in that, outer machine of air conditioner includes:
a housing having a first cavity and a second cavity; the shell is provided with a fresh air inlet and a fresh air outlet which are used for communicating the first cavity;
the fresh air processing device is arranged in the first cavity;
the compression heat exchange device is arranged in the second cavity;
the fresh air processing device is used for processing fresh air entering the first cavity from the fresh air inlet and conveying the processed fresh air to the indoor from the fresh air outlet.
2. The air conditioning equipment as claimed in claim 1, wherein the fresh air processing device comprises a first heat exchanger for performing heat exchange processing on fresh air entering the first cavity from the fresh air inlet.
3. The air conditioning equipment as claimed in claim 2, wherein the compression heat exchange device comprises a compressor, a second heat exchanger and a four-way valve; wherein,
the compressor has an inlet for introducing low pressure refrigerant into the compressor, an outlet for outputting high pressure refrigerant;
one end of the first heat exchanger is provided with a first connector, and the other end of the first heat exchanger is provided with a second connector; one end of the second heat exchanger is provided with a first connector, and the other end of the second heat exchanger is provided with a second connector;
the first interface of the first heat exchanger and the first interface of the second heat exchanger are communicated through a pipeline;
and the second interface of the first heat exchanger and the second interface of the second heat exchanger are connected with the inlet and the outlet of the compressor through a four-way valve.
4. Air conditioning apparatus according to claim 3,
when the fresh air entering the first cavity is subjected to heating treatment, the outlet of the compressor, the first heat exchanger, the second heat exchanger and the inlet of the compressor are sequentially communicated by controlling the four-way valve, so that a fresh air heating loop is formed;
when the fresh air entering the first cavity is subjected to refrigeration treatment, the outlet of the compressor, the second heat exchanger, the first heat exchanger and the inlet of the compressor are sequentially communicated by controlling the four-way valve, so that a fresh air refrigeration loop is formed.
5. The air conditioning apparatus according to claim 3, wherein a throttle valve is provided on a pipe between the first connection of the first heat exchanger and the first connection of the second heat exchanger.
6. The air conditioning equipment as claimed in claim 1, wherein the fresh air processing device comprises a filter screen, and the filter screen is arranged at the fresh air inlet in the first cavity to filter the fresh air entering the first cavity from the fresh air inlet.
7. The air conditioning apparatus of claim 6, wherein the filter screen comprises one or both of an activated carbon filter screen and a HEPA filter screen.
8. The air conditioning apparatus of claim 1, wherein said compression heat exchange means further comprises a heat radiation fan;
the shell is provided with an air outlet used for being communicated with the second cavity, and the heat dissipation fan is arranged at the position, close to the air outlet, in the second cavity and used for performing heat dissipation treatment on the compression heat exchange device.
9. The air conditioner as claimed in claim 8, wherein the first chamber is disposed above the second chamber, and the outlet communicating with the second chamber is located at a side of the housing.
10. The air conditioning equipment as claimed in any one of claims 1 to 9, wherein the fresh air processing device further comprises a blower fan, the blower fan is arranged at the air outlet in the first cavity and is used for introducing fresh air in the first cavity into the room; the fan is a volute fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521083276.7U CN205208816U (en) | 2015-12-21 | 2015-12-21 | Air conditioning equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521083276.7U CN205208816U (en) | 2015-12-21 | 2015-12-21 | Air conditioning equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205208816U true CN205208816U (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521083276.7U Active CN205208816U (en) | 2015-12-21 | 2015-12-21 | Air conditioning equipment |
Country Status (1)
| Country | Link |
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| CN (1) | CN205208816U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571011A (en) * | 2015-12-21 | 2016-05-11 | 珠海格力电器股份有限公司 | Air conditioning equipment and fresh air introducing method |
-
2015
- 2015-12-21 CN CN201521083276.7U patent/CN205208816U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571011A (en) * | 2015-12-21 | 2016-05-11 | 珠海格力电器股份有限公司 | Air conditioning equipment and fresh air introducing method |
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