CN211011666U - Waste heat recovery type high air supply temperature fresh air dehumidification unit - Google Patents
Waste heat recovery type high air supply temperature fresh air dehumidification unit Download PDFInfo
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- CN211011666U CN211011666U CN201921443915.4U CN201921443915U CN211011666U CN 211011666 U CN211011666 U CN 211011666U CN 201921443915 U CN201921443915 U CN 201921443915U CN 211011666 U CN211011666 U CN 211011666U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/56—Heat recovery units
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Abstract
The utility model relates to a waste heat recovery type high air supply temperature fresh air dehumidifying unit, which comprises an indoor unit shell; the indoor unit comprises an indoor unit shell, a first heat recovery heat exchanger, an indoor heat exchanger and a second heat recovery heat exchanger, wherein the indoor unit shell is provided with a fresh air inlet and an air supply outlet; the indoor unit shell is provided with a first air return opening, a second air return opening and an air outlet, the first air return opening, the air return channel, the air exhaust channel and the air outlet are sequentially communicated, and the second air return opening, the air exhaust channel and the air outlet are sequentially communicated. The utility model discloses a fresh air dehumidification unit can improve fresh air supply temperature, and the energy consumption is little.
Description
Technical Field
The utility model relates to an air temperature and humidity controlgear technical field indicates a waste heat recovery type high air supply temperature fresh air dehumidification unit especially.
Background
The total heat recovery type fresh air machine is more and more widely applied to the market, but the moisture content of fresh air processed by the total heat type fresh air machine set is higher, and the requirement of a user on the humidity of a use environment cannot be met at all in high-temperature and high-humidity weather. Ordinary fresh air dehumidification air conditioning unit can satisfy the requirement of humidity, but the air-out temperature ratio is lower after the dehumidification, and the comfort is poor on the one hand, and on the other hand can cause the air outlet dewfall.
At present, a fresh air fan on the market is not reheated, even if reheating is mostly electric heating or condensation reheating, the electric heating consumes electricity, the condensation reheating structure is complex, and the flow of a refrigerant needs to be well controlled so as to ensure the safe and reliable operation of the whole refrigerant system.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, the utility model provides a waste heat recovery type high air supply temperature fresh air dehumidification unit, this waste heat recovery type high air supply temperature fresh air dehumidification unit have the energy consumption little, can improve air supply temperature and dew point low advantage.
In order to achieve the above object, the utility model discloses a technical scheme be:
a waste heat recovery type high air supply temperature fresh air dehumidification unit comprises an indoor unit shell;
the indoor unit comprises an indoor unit shell, a first heat recovery heat exchanger, an indoor heat exchanger and a second heat recovery heat exchanger, wherein the indoor unit shell is provided with a fresh air inlet and an air supply outlet, the first heat recovery heat exchanger is provided with a fresh air channel and an air exhaust channel which exchange heat mutually, the indoor heat exchanger is provided with a cold and heat medium flow channel and a fresh air flow channel which exchange heat mutually, the second heat recovery heat exchanger is provided with a return air channel and an air supply channel which exchange heat mutually, and the fresh air inlet, the fresh air channel, the fresh air flow channel, the air supply channel and the air supply outlet are communicated in sequence;
the indoor unit shell is provided with a first air return opening, a second air return opening and an air outlet, the first air return opening, the air return channel, the air exhaust channel and the air outlet are sequentially communicated, and the second air return opening, the air exhaust channel and the air outlet are sequentially communicated; and the number of the first and second groups,
and the cooling and heating medium provider is used for providing a cooling medium or a heating medium for the cooling and heating medium flow channel to exchange heat.
The fresh air dehumidification unit makes full use of the recovery effect of the first heat recovery heat exchanger and the second heat recovery heat exchanger, during refrigeration, the temperature of the return air is lower after the return air passes through the second heat recovery heat exchanger, the heat recovery efficiency in the refrigeration state is higher, the energy in the return air is fully utilized, the energy consumption is low, in addition, the temperature of the fresh air after the heat exchange of the indoor heat exchanger can be improved by the second heat recovery heat exchanger, the air supply temperature of the air supply opening is improved, and the dewing phenomenon of the air supply opening is avoided.
Preferably, the cooling and heating medium supplier is disposed outside the indoor unit case.
Preferably, the cooling and heating medium provider includes:
an outdoor heat exchanger; the outdoor heat exchanger is provided with a cold and hot medium channel and an air channel which exchange heat with each other, the cold and hot medium channel is communicated with the cold and hot medium flow channel, and the air channel is communicated with outdoor atmosphere;
a compressor having a first port and a second port; and the number of the first and second groups,
and the cooling medium channel is communicated with the first inlet and outlet through the reversing valve, and the cooling medium flow channel is communicated with the second inlet and outlet through the reversing valve.
Preferably, the outdoor heat exchanger further comprises a cooling and heating medium pipeline, two ends of the cooling medium pipeline are respectively communicated with the cooling and heating medium flow channel of the indoor heat exchanger and the cooling and heating medium flow channel of the outdoor heat exchanger, the cooling and heating medium flow channel of the outdoor heat exchanger is communicated with the cooling and heating medium flow channel of the indoor heat exchanger through the cooling and heating medium channel of the outdoor heat exchanger, and the cooling and heating medium pipeline is sequentially provided with an outdoor filter, an outdoor electronic expansion valve, an indoor filter and an indoor electronic expansion valve.
Preferably, the first heat recovery heat exchanger and the indoor heat exchanger are heat-moisture exchangers for performing sensible heat and latent heat exchange, and the second heat recovery heat exchanger is a sensible heat exchanger for performing sensible heat exchange.
Preferably, the fresh air blower and the exhaust air blower are arranged in the indoor unit shell, the fresh air blower is used for sending fresh air discharged from the fresh air channel of the first heat recovery heat exchanger into the fresh air flow channel of the indoor heat exchanger, and the exhaust air blower is used for sending return air discharged from the exhaust air channel of the first heat recovery heat exchanger into the exhaust outlet.
Preferably, the air conditioner further comprises a first air inlet pipe, the first air inlet pipe is communicated with the first air return opening, and a temperature control valve is arranged on the first air return pipe.
Preferably, a fresh air primary filter and a fresh air high-efficiency filter are arranged at the fresh air inlet, and a return air filter is arranged at the first return air inlet.
Has the advantages that:
(1) the utility model discloses a waste heat recovery type high air supply temperature new trend dehumidification unit, first heat recovery heat exchanger, second heat recovery heat exchanger and indoor heat exchanger three cooperate, can effectively utilize the heat in airing exhaust, reduce the energy consumption, simultaneously, during high temperature environment, the new trend temperature after first heat recovery heat exchanger and the indoor heat exchanger refrigeration can effectively be improved in the heat recovery heat exchanger heat transfer of second, satisfies human comfort level requirement.
(2) The utility model discloses a waste heat recovery type high supply air temperature fresh air dehumidification unit, fresh air and return air adopt the passageway of two differences to carry out the heat exchange, have guaranteed the cleanliness factor of fresh air.
(3) The utility model discloses a waste heat recovery type high air supply temperature fresh air dehumidification unit, compact structure, overall dimension is little, and the installation is swiftly convenient.
Drawings
The above features, technical features, advantages and implementations of a waste heat recovery type high supply air temperature fresh air dehumidifier unit will be further described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of the waste heat recovery type high air supply temperature fresh air dehumidifying unit of the present invention.
The reference numbers illustrate:
1-fresh air primary effect filter, 2-fresh air high-efficiency filter, 3-first heat recovery heat exchanger, 4-second heat recovery heat exchanger, 5-exhaust air blower, 6-fresh air blower, 7-indoor heat exchanger, 8-indoor expansion valve, 9-return air filter, 10-compressor, 11-gas-liquid separator, 12-oil separator, 13-reversing valve, 14-outdoor heat exchanger, 15-outdoor filter, 16-outdoor electronic expansion valve, 17-fresh air inlet, 18-exhaust outlet, 19-second return air inlet, 20-supply air outlet and 21-first return air inlet.
Detailed Description
In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.
For the sake of simplicity, only the parts relevant to the present invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
The waste heat recovery type high supply air temperature fresh air dehumidifying unit according to the embodiment of the present invention will be described with reference to fig. 1.
The utility model provides a high supply air temperature fresh air dehumidification unit of waste heat recovery type can include that the indoor set casing and cold and hot medium provide the ware, the indoor set casing is equipped with fresh air inlet 17 and supply-air outlet 20, be equipped with first heat recovery heat exchanger 3 in the indoor set casing, indoor heat exchanger 7 and second heat recovery heat exchanger 4, first heat recovery heat exchanger 3 has the fresh air passageway and the passageway of airing exhaust of mutual heat transfer, indoor heat exchanger 7 has cold and hot medium flow channel and the fresh air flow channel of mutual heat transfer, second heat recovery heat exchanger 4 has return air passageway and the air supply passageway of mutual heat transfer, the fresh air inlet, the fresh air passageway of first heat recovery heat exchanger 3, the fresh air flow channel of indoor heat exchanger 7, the air supply passageway and the supply-air outlet 20 of second heat recovery heat exchanger 4 communicate in.
The indoor unit shell is provided with a first air return opening 21, a second air return opening 19 and an air outlet 18, the first air return opening 21, an air return channel of the second heat recovery heat exchanger 4, an air exhaust channel of the first heat recovery heat exchanger 3 and the air outlet 18 are sequentially communicated, the second air return opening 19, an air exhaust channel of the first heat recovery heat exchanger 3 and the air outlet 18 are sequentially communicated, and the cold and heat medium supplier is used for supplying a cold medium or a heat medium for the cold and heat medium flow channel to exchange heat. Thus, in a refrigeration state, outdoor fresh air firstly exchanges heat with indoor return air through the first heat recovery heat exchanger 3 and then exchanges heat with a refrigerant in the indoor heat exchanger 7, the temperature of the fresh air after the second heat exchange is lower than that of the indoor return air, the processed fresh air exchanges heat with the other part of the indoor return air through the second heat recovery heat exchanger 4, and the temperature of the indoor return air is higher than that of the fresh air after the previous second heat exchange, so that the temperature of the fresh air is raised after the heat exchange, and the raised fresh air is sent into a room through the air supply opening 20; the indoor return air is divided into two parts, the return air entering from the second return air inlet 19 directly exchanges heat with outdoor fresh air, the return air entering from the first return air inlet 21 is mainly used for raising the temperature of the air supply temperature after being cooled by the indoor heat exchanger 7, in addition, the temperature of the return air after being subjected to heat exchange by the second heat recovery heat exchanger 4 is lower, the heat recovery of the first heat recovery heat exchanger 3 is more facilitated, and the heat recovery efficiency of the first heat recovery heat exchanger 3 is higher.
In a heating state, the second air return port 21 is closed, outdoor fresh air exchanges heat with indoor return air entering from the second air return port 19 through the first heat recovery heat exchanger 3, then exchanges heat with heat medium of the indoor heat exchanger 7, absorbs heat of the heat medium, and heats and sends the heat medium into a room; indoor return air is subjected to heat exchange with outdoor fresh air through the first heat recovery heat exchanger 3, and the treated return air is discharged outdoors through the air outlet 18.
Regardless of the refrigeration state or the heating state, the fresh air dehumidifying unit makes full use of the recovery effect of the first heat recovery heat exchanger 3 and the second heat recovery heat exchanger 4, the energy in the return air is fully utilized, the energy consumption is low, the temperature of the return air after the return air passes through the second heat recovery heat exchanger 4 is lower, the heat recovery efficiency in the refrigeration state is higher, in addition, the fresh air temperature of the indoor heat exchanger after heat exchange can also be improved by the second heat recovery heat exchanger 4, the air supply temperature of an air supply opening is improved, and the dewing phenomenon of the air supply opening is avoided.
The utility model discloses an in some examples, cold and hot medium provides the ware and can establish outside indoor casing, it is to be explained that cold and hot medium provides the general required volume of ware great, perhaps the structure is comparatively complicated, from this, indoor set and cold and hot medium provide the ware and adopt split type design, unit maintenance simple to operate.
In some examples of the present invention, the refrigerant supplier may include an outdoor heat exchanger 14, a compressor 10 and a direction changing valve 13, the outdoor heat exchanger 14 has a refrigerant passage and an air passage for exchanging heat with each other, the refrigerant passage of the outdoor heat exchanger 14 communicates with a refrigerant flow passage of the indoor heat exchanger 7, the air passage of the outdoor heat exchanger 14 communicates with the outdoor atmosphere, the compressor 10 has a first inlet and a second inlet, the refrigerant passage of the outdoor heat exchanger 14 communicates with the first inlet and the second inlet of the compressor 10 through the direction changing valve 13, an oil separator 12 is arranged on a communication pipeline between the reversing valve 13 and a first inlet and a first outlet of the compressor 10, a cold and heat medium flow passage of the indoor heat exchanger 7 is communicated with a second inlet and a second outlet of the compressor 10 through the reversing valve 13, and a gas-liquid separator 11 is arranged on a communication pipeline between the reversing valve 13 and a second inlet and outlet of the compressor 10.
In this way, in the cooling state, the gas freon in the compressor 10 is pressurized to become high-temperature high-pressure gas, enters the outdoor heat exchanger 14 (corresponding to a condenser at this time), exchanges heat with outdoor hot air, the gas freon is condensed, liquefied, and released heat to become liquid, and at the same time, the heat is released to the atmosphere, the liquid freon enters the indoor heat exchanger 7 (corresponding to an evaporator at this time), evaporates, gasifies, absorbs heat, becomes gas, and absorbs the heat of the indoor air at the same time, thereby achieving the purpose of reducing the indoor temperature and humidity, and the freon becoming gas enters the compressor 10 again to start the next cycle.
In the heating state, the reversing valve 13 reverses, and the cold and hot medium gas freon in the compressor 10 is pressurized to become high-temperature and high-pressure gas, and enters the indoor heat exchanger 7 (which is equivalent to a condenser at this time), so that the gas is condensed, liquefied and released heat to become liquid, and meanwhile, the indoor air is heated, thereby achieving the purpose of increasing the indoor temperature. The liquid freon enters the outdoor heat exchanger 14 (in this case, the evaporator), evaporates and gasifies to absorb heat to become gas, and at the same time absorbs heat from the outdoor air (the outdoor air becomes cooler), the freon that becomes gas enters the compressor 10 again to start the next cycle. In this way, the refrigerant provider can continuously provide the refrigerant and the heating medium to the indoor heat exchanger 7 for continuous cooling and heating of the indoor heat exchanger 7. Therefore, the indoor heat exchanger of the fresh air dehumidifying unit is matched with the cold and hot medium provider, the running frequency of the compressor is reduced, and the purpose of running in winter and summer to save energy is achieved.
The utility model discloses an in some examples, waste heat recovery type high supply air temperature fresh air dehumidification unit can also include the cold and hot media pipeline, the both ends of refrigerant pipeline respectively with the cold and hot media flow channel of indoor heat exchanger 7 and the cold and hot media passageway intercommunication of outdoor heat exchanger 14, by the cold and hot media flow channel of the cold and hot media passageway of outdoor heat exchanger 14 to indoor heat exchanger 7, be equipped with outdoor filter 15, outdoor electronic expansion valve 16, indoor filter and indoor electronic expansion valve 8 on the cold and hot media pipeline in proper order. The filter is used for eliminating impurities in Freon so as to protect the normal use of the valve and equipment. When the liquid freon enters the filter, its impurities are blocked and the clean filtrate is discharged through the filter outlet. The electronic expansion valve is used for throttling and decompressing the liquid Freon.
In some examples of the present invention, the first heat recovery heat exchanger 3 and the indoor heat exchanger 7 may be heat-moisture exchangers for performing sensible heat and latent heat exchange, and the second heat recovery heat exchanger 4 may be sensible heat exchangers for performing sensible heat exchange. It should be noted that, in summer, the humidity of fresh air is generally relatively large, the temperature is relatively high, the humidity of return air is generally relatively low, the temperature is relatively low, therefore, in summer, the fresh air dehumidifier unit utilizes the fresh air of the first heat exchanger 3 and the return air to exchange to reduce the humidity and the temperature of the fresh air, then utilizes the indoor heat exchanger 7 to cool down and dehumidify again, and utilizes the heat exchange of the second heat recoverer heat exchanger 4 to heat after fully dehumidifying, so that the air supply temperature is improved, the dew point of the fresh air is also reduced, on the one hand, the comfort of a human body is improved, and on the other hand, the dewing of an air supply opening. Specifically, the first heat recovery heat exchanger 3 is a total heat exchanger, the second heat recovery heat exchanger 4 is a sensible heat exchanger, and the indoor heat exchanger 7 is an evaporator or a condenser.
The utility model discloses an in some examples, can be equipped with new trend forced draught blower 6 and the forced draught blower 5 of airing exhaust in the indoor set casing, new trend forced draught blower 6 is used for sending into the new trend flow path of indoor heat exchanger 7 with the new trend passageway exhaust of first heat recovery heat exchanger 3, and the forced draught blower 5 of airing exhaust is used for sending into the air exit 18 with the passageway exhaust return air of airing exhaust of first heat recovery heat exchanger 3, and from this, the forced draught blower can accelerate the flow velocity of indoor new trend and return air, improves air conditioning unit's operating efficiency.
The utility model discloses an in some examples, waste heat recovery type high supply air temperature fresh air dehumidification unit can also include first air-supply line, first air-supply line and first return air inlet intercommunication are equipped with temperature-sensing valve on the first return air pipe, and thus, under the heating state, temperature-sensing valve can not open, first return air inlet is in the closed condition, first heat recovery heat exchanger can not work, under the cooling state, when outdoor temperature is higher than a definite value, temperature-sensing valve opens, second heat exchanger begins to work, and thus, first return air inlet on-off control device simple structure, satisfy the user demand simultaneously, reduce the energy consumption.
The utility model discloses an in some examples, the new trend entrance can be equipped with new trend primary filter and new trend high efficiency filter, and first return air inlet department is equipped with the return air filter, and from this, the filter can filter new trend and return air, improves the cleanliness factor that gets into indoor air.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A waste heat recovery type high air supply temperature fresh air dehumidification unit is characterized by comprising an indoor unit shell;
the indoor unit comprises an indoor unit shell, a first heat recovery heat exchanger, an indoor heat exchanger and a second heat recovery heat exchanger, wherein the indoor unit shell is provided with a fresh air inlet and an air supply outlet, the first heat recovery heat exchanger is provided with a fresh air channel and an air exhaust channel which exchange heat mutually, the indoor heat exchanger is provided with a cold and heat medium flow channel and a fresh air flow channel which exchange heat mutually, the second heat recovery heat exchanger is provided with a return air channel and an air supply channel which exchange heat mutually, and the fresh air inlet, the fresh air channel, the fresh air flow channel, the air supply channel and the air supply outlet are communicated in sequence;
the indoor unit shell is provided with a first air return opening, a second air return opening and an air outlet, the first air return opening, the air return channel, the air exhaust channel and the air outlet are sequentially communicated, and the second air return opening, the air exhaust channel and the air outlet are sequentially communicated; and the number of the first and second groups,
and the cooling and heating medium provider is used for providing a cooling medium or a heating medium for the cooling and heating medium flow channel to exchange heat.
2. The waste heat recovery type high supply air temperature fresh air dehumidifying unit as claimed in claim 1, wherein the cooling medium supplier is provided outside the indoor unit casing.
3. The waste heat recovery type high supply air temperature fresh air dehumidifying unit as claimed in claim 2, wherein the cooling medium provider comprises:
an outdoor heat exchanger; the outdoor heat exchanger is provided with a cold and hot medium channel and an air channel which exchange heat with each other, the cold and hot medium channel is communicated with the cold and hot medium flow channel, and the air channel is communicated with outdoor atmosphere;
a compressor having a first port and a second port; and the number of the first and second groups,
and the cooling medium channel is communicated with the first inlet and outlet through the reversing valve, and the cooling medium flow channel is communicated with the second inlet and outlet through the reversing valve.
4. The waste heat recovery type high supply air temperature fresh air dehumidifier unit as claimed in claim 3, further comprising a cooling medium pipeline, wherein two ends of the cooling medium pipeline are respectively communicated with the cooling medium flow channel and the cooling medium channel, the cooling medium channel is communicated with the cooling medium flow channel, and an outdoor filter, an outdoor electronic expansion valve, an indoor filter and an indoor electronic expansion valve are sequentially arranged on the cooling medium pipeline.
5. The waste heat recovery type high supply air temperature fresh air dehumidifying unit as claimed in claim 1, wherein the first heat recovery heat exchanger and the indoor heat exchanger are heat and humidity exchangers for performing sensible heat and latent heat exchange, and the second heat recovery heat exchanger is a sensible heat exchanger for performing sensible heat exchange.
6. The waste heat recovery type high supply air temperature fresh air dehumidifier unit as claimed in claim 1, wherein a fresh air blower and an exhaust air blower are provided in the indoor unit casing, the fresh air blower is used for sending fresh air exhausted from the fresh air channel of the first heat recovery heat exchanger into the fresh air flow channel of the indoor heat exchanger, and the exhaust air blower is used for sending return air exhausted from the exhaust air channel of the first heat recovery heat exchanger into the air outlet.
7. The waste heat recovery type high blast temperature fresh air dehumidifying unit as claimed in claim 1, further comprising a first air inlet pipe, wherein the first air inlet pipe is communicated with the first air return opening, and a temperature control valve is disposed on the first air return pipe.
8. The waste heat recovery type high supply air temperature fresh air dehumidifying unit as claimed in claim 1, wherein a fresh air primary filter and a fresh air high efficiency filter are arranged at the fresh air inlet, and a return air filter is arranged at the first return air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921443915.4U CN211011666U (en) | 2019-09-02 | 2019-09-02 | Waste heat recovery type high air supply temperature fresh air dehumidification unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921443915.4U CN211011666U (en) | 2019-09-02 | 2019-09-02 | Waste heat recovery type high air supply temperature fresh air dehumidification unit |
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| CN211011666U true CN211011666U (en) | 2020-07-14 |
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| CN201921443915.4U Active CN211011666U (en) | 2019-09-02 | 2019-09-02 | Waste heat recovery type high air supply temperature fresh air dehumidification unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023093261A1 (en) * | 2021-11-24 | 2023-06-01 | 广东美的制冷设备有限公司 | Fresh air equipment control method and apparatus, fresh air equipment, and storage medium |
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2019
- 2019-09-02 CN CN201921443915.4U patent/CN211011666U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023093261A1 (en) * | 2021-11-24 | 2023-06-01 | 广东美的制冷设备有限公司 | Fresh air equipment control method and apparatus, fresh air equipment, and storage medium |
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