CN214249876U - Air conditioner and outdoor unit thereof - Google Patents
Air conditioner and outdoor unit thereof Download PDFInfo
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- CN214249876U CN214249876U CN202022840578.1U CN202022840578U CN214249876U CN 214249876 U CN214249876 U CN 214249876U CN 202022840578 U CN202022840578 U CN 202022840578U CN 214249876 U CN214249876 U CN 214249876U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 270
- 238000001816 cooling Methods 0.000 claims abstract description 77
- 239000003507 refrigerant Substances 0.000 claims abstract description 59
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 26
- 238000004891 communication Methods 0.000 claims description 5
- 239000010865 sewage Substances 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 abstract description 23
- 239000007921 spray Substances 0.000 abstract description 23
- 238000001704 evaporation Methods 0.000 abstract description 17
- 230000008020 evaporation Effects 0.000 abstract description 17
- 238000010257 thawing Methods 0.000 abstract description 16
- 238000004378 air conditioning Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract 1
- 239000003570 air Substances 0.000 description 74
- 238000005057 refrigeration Methods 0.000 description 12
- 238000005507 spraying Methods 0.000 description 8
- 230000005494 condensation Effects 0.000 description 6
- 238000009833 condensation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000007710 freezing Methods 0.000 description 4
- 230000008014 freezing Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
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- 239000007787 solid Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The utility model relates to an air conditioning technology field specifically provides a cold and warm air conditioner and off-premises station thereof, aims at solving the problem that freezes in the evaporation cold heat exchanger drainage of off-premises station is malfunctioning and its water tank and the pipeline that communicates with it under the low temperature weather. The outdoor heat exchanger of the outdoor unit comprises an evaporative cooling heat exchanger, a spray pipe of the evaporative cooling heat exchanger is communicated with a water tank through a water pump, a water receiving tray of the evaporative cooling heat exchanger is positioned above the water tank and used for collecting cooling water after heat exchange with a refrigerant in the evaporative cooling heat exchanger, and the evaporative heat exchanger further comprises a drainage mechanism which is used for selectively communicating the water receiving tray and the water tank or an external water pipe according to the working mode of the air conditioner. When this off-premises station not only can realize refrigerating in summer, the water is provided for the evaporation cooling heat exchanger by recycle and utilization in the water collector and sprays and uses the cooling water, heats or when defrosting in winter moreover, and the water that condenses in the water collector or the defrosting water is in time direct is arranged outside the casing, has avoided the ponding in the water collector to freeze and has caused the problem that the drainage is malfunctioning.
Description
Technical Field
The utility model belongs to the technical field of the air conditioner, specifically provide a cold and warm air conditioner and off-premises station thereof.
Background
As is well known, air conditioners may be classified into a single cooling air conditioner, a single heating air conditioner and a cooling and heating air conditioner according to their functions. As the name suggests, the single refrigeration air conditioner only has the refrigeration function and is mainly suitable for the northern areas heated in winter, the single heating air conditioner only has the heating function and is mostly suitable for the southern areas without collective heating in winter, and the cooling and heating air conditioner can refrigerate or heat and can meet the requirements of users in different areas.
The air conditioner at least comprises a compressor, an outdoor heat exchanger, an electronic expansion valve, an indoor heat exchanger and a four-way reversing valve. The compressor, the outdoor heat exchanger, the electronic expansion valve, the indoor heat exchanger and the four-way reversing valve are communicated with each other through pipelines to form a refrigerant circulation loop for refrigerant to circularly flow. The four-way reversing valve is used for adjusting the flow direction of a refrigerant in the refrigerant circulation loop so as to adjust the refrigeration or heating of the air conditioner.
When the air conditioner is used for refrigerating, high-temperature and high-pressure gaseous refrigerant in the compressor circularly flows in the refrigerant circulation loop, is subjected to heat exchange, heat release and condensation with outdoor air when flowing through the outdoor heat exchanger to form liquid refrigerant, flows into the indoor heat exchanger after being throttled by the electronic expansion valve, is subjected to heat exchange, heat absorption and evaporation with the indoor air to form gaseous refrigerant, and finally returns into the compressor, and the indoor air releases heat and is cooled to achieve the purpose of refrigerating.
When the air conditioner heats, high-temperature and high-pressure gaseous refrigerant in the compressor circularly flows in the refrigerant circulation loop, exchanges heat with indoor air to release heat and condense when flowing through the indoor heat exchanger to form liquid refrigerant, flows into the outdoor heat exchanger after being throttled by the electronic expansion valve to exchange heat with outdoor air to absorb heat and evaporate into gaseous refrigerant, and finally returns into the compressor, and the indoor air absorbs heat to raise temperature to achieve the purpose of heating.
At present, pure air-cooled heat exchangers are mostly adopted in an outdoor heat exchanger and an indoor heat exchanger, the air-cooled heat exchangers directly exchange sensible heat with refrigerant by using air, the system has high operation pressure, and the refrigeration effect is poor under the condition of high-temperature weather.
Therefore, the outdoor heat exchanger of the air conditioner adopts a combined structure of an air cooling heat exchanger and an evaporative cooling heat exchanger. When the unit is in a summer refrigeration mode, the evaporative cooling heat exchanger is used as a main condensation heat exchanger, the air cooling heat exchanger is used as auxiliary cooling, and the condensation effect is improved through the common operation of the air cooling heat exchanger and the evaporative cooling heat exchanger, so that the refrigeration performance of the unit is improved. When the unit is in a winter heating mode, the air-cooled heat exchanger is used as a main heat exchanger, and the evaporative cooling heat exchanger is used as an auxiliary heat exchanger. In this mode, the spray assembly is closed, namely the spray water pump of the spray assembly is in a closed state, and at the moment, the evaporative cooling heat exchanger is used as an auxiliary evaporator to absorb air heat, so that the evaporative cooling unit realizes a heat pump function.
The spraying mechanism of the outdoor heat exchanger with the structure also comprises a water receiving disc, a water tank, a water pump and a blow-down valve, wherein the water receiving disc is positioned below the evaporative cooling heat exchanger to collect cooling water sprayed by the spraying pipe or defrosting water generated during defrosting of the heat exchanger, the water tank is communicated with the water receiving disc, and the spraying pipe is communicated with the water tank through the water pump so as to recycle the cooling water in the water tank. The outdoor heat exchanger also comprises a drainage mechanism, water in the water tank is led out of the housing through a drain pipe in the drainage mechanism, and in order to drain water regularly, a drain valve is further arranged on the drain pipe and used for controlling the drain pipe to be switched on or switched off.
When the air conditioner is used for heating and defrosting, a water pump of a spraying mechanism of the evaporative cooling heat exchanger is closed, even if a drain valve is opened in the process, part of defrosting water can be remained in a water tank or a pipeline, and along with the increase of defrosting times or the continuous reduction of the external environment temperature, part of defrosting water can be continuously frozen and extend to a water receiving disc to form thick ice, so that the drainage of a system and the heating of the heat exchanger are influenced, and some parts in an evaporative cooling water circulation can be possibly frozen to influence the use.
In view of the above, those skilled in the art need to optimize the structure of the evaporative cooling heat exchanger to solve the problem of the water drainage failure of the evaporative cooling heat exchanger and the icing of the water tank or the pipeline connected to the water tank in low temperature weather.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the evaporation cold heat exchanger drainage of the outdoor unit of the cold and warm air conditioner is malfunctioning and the water tank thereof freezes in the pipeline communicated with the water tank, the utility model provides an outdoor unit of the cold and warm air conditioner on the one hand.
The utility model discloses an outdoor heat exchanger of off-premises station of cold and warm air conditioner includes the evaporation cold heat exchanger, the shower and the water tank of evaporation cold heat exchanger pass through the water pump intercommunication, the water collector of evaporation cold heat exchanger is located the water tank top for collect with cooling water after the refrigerant heat exchange in the evaporation cold heat exchanger, a serial communication port, the evaporation cold heat exchanger still includes drainage mechanism, drainage mechanism communicates selectively the water collector with water tank or external water pipe.
The utility model discloses an among the preferred scheme of above-mentioned off-premises station, drainage mechanism includes main drain pipe, branch drain pipe and drainage ooff valve, the water inlet of main drain pipe with the water collector intercommunication, the first delivery port of main drain pipe with the water tank passes through branch drain pipe intercommunication, main drain pipe second delivery port with external water pipe intercommunication, the water inlet first delivery port with the second delivery port sets up from last to down in order, the drainage ooff valve sets up on the external water pipe, be used for switching on or closing external water pipe.
The utility model discloses an among the preferred scheme of above-mentioned off-premises station, drainage mechanism specifically is two three-way valves, two three-way valves the first port with the water collector intercommunication, its second port with the water tank intercommunication, its third port with external water pipe intercommunication, and two three-way valves include first operating position and second operating position: when the two-position three-way valve is located at the first working position, the first port and the second port are communicated, and the third port is cut off; when the two-position three-way valve is located at the second working position, the first port and the third port are communicated, and the second port is cut off.
In a preferred embodiment of the above outdoor unit, the evaporative cooling heat exchanger further includes: the liquid level detection element is used for detecting the liquid level in the water receiving tray; the water outlet of the water replenishing pipe is communicated with the water receiving disc, and the water inlet of the water replenishing pipe is communicated with external water replenishing equipment; and the water replenishing valve is arranged on the water replenishing pipe and used for switching on or off the water replenishing pipe.
In an preferable embodiment of the outdoor unit of the present invention, the liquid level detecting element is a ball float valve or a liquid level sensor.
In a preferred embodiment of the above outdoor unit, the evaporative cooling heat exchanger further includes a softening device and a filter, the softening device and the filter are disposed on the water replenishing pipe and located on the upstream side of the water replenishing valve.
In a preferred embodiment of the above outdoor unit, the evaporative cooling heat exchanger further includes: one port of the sewage discharge pipe is communicated with the water tank, and the other port of the sewage discharge pipe penetrates through the shell of the outdoor unit and extends out of the shell; and the blow-down valve is arranged on the blow-down pipe and is used for closing or conducting the blow-down pipe.
The utility model discloses an among the preferred scheme of above-mentioned off-premises station, the casing quilt of off-premises station the water collector is cut apart into last cavity and lower cavity, the evaporation cold heat exchanger with the shower set up in go up in the cavity, the water tank the water pump drainage mechanism the compressor of off-premises station, electronic expansion valve and four-way reversing valve set up in the lower cavity.
The utility model discloses an outdoor heat exchanger of off-premises station of changes in temperature air conditioner includes the evaporation cold heat exchanger, the shower and the water tank of the evaporation cold heat exchanger pass through the water pump intercommunication, the water collector of the evaporation cold heat exchanger is located the water tank top to be used for collecting with cooling water behind the refrigerant heat exchange in the evaporation cold heat exchanger, the evaporation heat exchanger still includes drainage mechanism, drainage mechanism is used for the basis the mode of operation of changes in temperature air conditioner communicates selectively the water collector with water tank or external water pipe.
After this off-premises station increases this drainage mechanism, when not only can realizing the refrigeration in summer, the water is provided the cooling water for spraying by recycle for the evaporation cooling heat exchanger in the water collector, and when heating or defrosting in winter, the condensate water or the defrosting water in the water collector in time direct is discharged outside the casing, has avoided the water collector in the ponding to freeze and has caused the malfunctioning problem of drainage, has also prevented simultaneously that the condensate water or the defrosting water from getting into the water tank and causing the problem of communicating water pipe and water pump etc. because of freezing and bad.
On the other hand, the utility model provides a cold and warm air conditioner, it includes the off-premises station, its characterized in that, the off-premises station specifically is as above the off-premises station.
The utility model discloses an among the preferred scheme of above-mentioned off-premises station, cold-warm air conditioner still includes the bypass branch road, bypass branch road bypass the induction port of cold-warm air conditioner's compressor with the liquid pipeline of cold-warm air conditioner's refrigerant circulation circuit, the bypass branch road is including the capillary and the bypass switch valve of establishing ties.
It should be noted that the cooling and heating air conditioner of the present invention has all the technical effects of the outdoor unit, and those skilled in the art can understand the technical effects without any doubt according to the foregoing description, so that the description is omitted here.
Drawings
Fig. 1 is a block diagram schematically illustrating the structure of an embodiment of the cooling and heating air conditioner of the present invention;
fig. 2a is a schematic structural diagram of an outdoor unit according to a first embodiment of the present invention;
FIG. 2b is an enlarged view of a portion of the structure at A in FIG. 2 a;
fig. 3a is a schematic structural view of an outdoor unit according to a second embodiment of the present invention;
fig. 3B is an enlarged view of a portion of the structure at B in fig. 3 a.
Wherein, the one-to-one correspondence between component names and reference numbers in fig. 1 to 3a is:
1, a compressor;
2 outdoor heat exchanger, 20 shell, 20u upper chamber, 20x lower chamber, 21 air cooling heat exchanger, 22 evaporative cooling heat exchanger, 23 spray pipe, 24 water tank, 25 water pump, 26 water pipe, 27 blow off pipe, 28 blow off valve, 29 water replenishing pipe, 210 liquid level detecting element, 211 water replenishing valve, 212 external water pipe, 213 main water discharging pipe, 214 water discharging pipe, 215 water discharging switch valve, 216 two-position three-way reversing valve, 217 softening device, 218 filter;
3, indoor machine;
4, an electronic expansion valve;
5, four-way reversing valve: 51 a first port, 52 a second port, 53 a third port, 54 a fourth port;
60 a first gas pipeline, 61 a second gas pipeline, 63 a first liquid pipeline, 64 a second liquid pipeline, 65 a bypass branch, 650 a bypass switch valve and 651 a capillary tube;
7, a water pan;
8 blower fan.
Detailed Description
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The structure and the working principle of the cooling and heating air conditioner will be described in detail with reference to fig. 1, and fig. 1 is a block diagram showing the structure of a specific embodiment of the cooling and heating air conditioner of the present invention. In fig. 1, solid arrows represent the refrigerant flow direction during cooling of the air conditioner, and dotted arrows represent the refrigerant flow direction during heating of the air conditioner.
Referring to fig. 1, the air conditioner at least comprises a compressor 1, an outdoor heat exchanger 2, an indoor heat exchanger 3, an electronic expansion valve 4 and a four-way reversing valve 5, wherein the compressor 1, the outdoor heat exchanger 2, the electronic expansion valve 4, the indoor heat exchanger 3 and the four-way reversing valve 5 are communicated with each other through pipelines to form a refrigerant circulation loop for refrigerant to circularly flow. The four-way reversing valve 5 is used for adjusting the flow direction of the refrigerant in the refrigerant circulation loop so as to adjust the refrigeration or heating of the air conditioner.
In detail, the four-way selector valve 5 has a first port 51, a second port 52, a third port 53 and a fourth port 54, wherein the first port 51 communicates with the discharge port of the compressor 1 through a gas line, the second port 52 communicates with one port of the indoor heat exchanger 3 through a first gas line 60, the third port 53 communicates with one port of the outdoor heat exchanger 2 through a second gas line 61, the fourth port 54 communicates with the suction port of the compressor 1, the other port of the outdoor heat exchanger 2 communicates with one port of the electronic expansion valve 4 through a first liquid line 63, and the other port of the indoor heat exchanger 3 communicates with the other port of the electronic expansion valve 4 through a second liquid line 64.
When the air conditioner is used for refrigerating, the first port 51 and the third port 53 of the four-way reversing valve 5 are communicated, the second port 52 and the fourth port 54 of the four-way reversing valve are communicated, high-temperature and high-pressure gaseous refrigerant in the compressor 1 circularly flows in the refrigerant circulating loop, is subjected to heat exchange with outdoor air to release heat and condense when flowing through the outdoor heat exchanger 2 to form liquid refrigerant, flows into the indoor heat exchanger 3 after being throttled by the electronic expansion valve 4, is subjected to heat exchange with the indoor air to absorb heat and evaporate into gaseous refrigerant, and finally returns to the compressor 1, and the indoor air releases heat and is cooled during the period to achieve the purpose of refrigerating.
When the air conditioner heats, the first port 51 and the second port 52 of the four-way reversing valve 5 are communicated, the third port 53 and the fourth port 54 of the four-way reversing valve are communicated, high-temperature and high-pressure gaseous refrigerant in the compressor 1 circularly flows in the refrigerant circulation loop, and forms liquid refrigerant after heat exchange, heat release and condensation with indoor air when flowing through the indoor heat exchanger 3, flows into the outdoor heat exchanger 2 after throttling by the electronic expansion valve 4, exchanges heat with the outdoor air to absorb heat and evaporate into gaseous refrigerant, and finally returns to the compressor 1, and the purpose of heating is realized by absorbing heat and increasing temperature of the indoor air during the period.
The air conditioner further includes a bypass branch 65, the bypass branch 65 bypassing the suction port of the compressor 1 and the first liquid line 63, the bypass branch 65 including a capillary tube 651 and a bypass switching valve 650.
Whether refrigerating or heating, the bypass switch valve 650 is opened at a time before the compressor 1 is started, so that the exhaust port and the suction port of the compressor 1 are basically and directly communicated to adjust the high pressure and the low pressure of the system, and after the absolute value of the system high pressure at the exhaust port of the compressor 1 and the system low pressure difference at the suction port reaches a starting threshold, the compressor 1 of the air conditioner can be started, so that the conditions of the balance between the temperature of lubricating oil and the high pressure and the low pressure of the system can be strictly met, and the situation that the refrigerant dissolved in the oil pool of the compressor 1 boils and foams to bring the lubricating oil into a compression cavity, so that the compressor 1 is damaged by liquid compression or the compressor 1 cannot be started due to overlarge high and low pressure difference is basically avoided.
With continued reference to fig. 1, the outdoor heat exchanger 2 of the air-conditioning apparatus is specifically a composite heat exchange assembly, the composite heat exchange assembly includes an air-cooled heat exchanger 21 and an evaporative cooling heat exchanger 22, the air-cooled heat exchanger 21 and the evaporative cooling heat exchanger 22 are connected in series to form a refrigerant channel, or the air-cooled heat exchanger 21 and the evaporative cooling heat exchanger 22 are connected in parallel to form a refrigerant channel, the refrigerant channel is communicated with the compressor 1, the four-way reversing valve 5, the indoor heat exchanger 3 and the electronic expansion valve 4 to form a refrigerant circulation loop, so that the refrigerant circulates in the refrigerant circulation loop to achieve the purpose of refrigerating or heating the indoor side.
The first embodiment is as follows:
for easy understanding and simplicity of description, the structure and operation of the outdoor unit will be described in detail with reference to fig. 2a and 2 b. Fig. 2a is a schematic structural diagram of an outdoor unit according to a first embodiment of the present invention, and fig. 2b is a schematic partial enlarged view of a position a in fig. 2 a.
Referring to fig. 2a and 2b, the air-cooled evaporative cooling heat exchange assembly in the present embodiment includes a housing 20, and an air-cooled heat exchanger 21 and an evaporative cooling heat exchanger 22 disposed in the housing 20, wherein a spray assembly of the evaporative cooling heat exchanger 22 includes a spray pipe 23 located above the evaporative cooling heat exchanger 22, and a plurality of spray heads or nozzles disposed on the spray pipe 23 and communicated therewith. The evaporative cooling heat exchanger also comprises a water receiving tray 7 which is fixed in the shell 20 and positioned below the heat exchange body of the evaporative cooling heat exchanger 22, the water receiving tray is used for collecting cooling water after heat exchange with a refrigerant in the evaporative cooling heat exchanger 22, the evaporative cooling heat exchanger also comprises a water tank 24 and a water pump 25 which are positioned in the shell 20 and positioned below the water receiving tray 7, and the water tank 24 and the spray pipe 23 are communicated through the water pump 25 and a water conveying pipe 26.
With continued reference to fig. 2b, the evaporative cold heat exchanger 22 also includes a drain mechanism comprising a main drain pipe 213, a branch drain pipe 214 and a drain on/off valve 215. The water inlet of the main water drainage pipe 213 is communicated with the water receiving tray 7, the first water outlet thereof is communicated with the water tank 24 through the branch water drainage pipe 214, the second water outlet thereof is communicated with the external water drainage pipe 212, the water inlet, the first water outlet and the second water outlet are sequentially arranged from top to bottom, the external water drainage pipe 212 penetrates through the shell 20 and extends out of the shell 20, and the water drainage switch valve 215 is arranged on the external water drainage pipe 212 and is used for switching on or off the external water drainage pipe 212.
When the air conditioner receives a demand instruction of cooling of a user, the controller closes the drain switch valve 215, the water pump 25 is started, the compressor 1 is started, cooling water in the water tank 24 is pumped into the spray pipe 23 by the water pump 25 through the water delivery pipe 26, and is sprayed onto the surface of the evaporative cooling heat exchanger 22 by the spray head or the nozzle, the cooling water absorbs heat emitted by a refrigerant in the evaporative cooling heat exchanger 22 and then falls to the water receiving tray 7, and the cooling water in the water receiving tray 7 flows into the water tank 24 through the main drain pipe 213 and the branch drain pipe 214, and is pumped into the spray pipe 23 by the water pump 25 again. Meanwhile, the high-temperature and high-pressure gaseous refrigerant in the compressor 1 firstly flows through the air-cooled heat exchanger 21, so that the sensible heat exchange between air and the refrigerant is realized, and the temperature of the refrigerant steam is reduced; and the evaporative cooling heat exchanger 22 is used for realizing the simultaneous heat exchange of air, water and refrigerant, thereby improving the refrigeration efficiency and ensuring the long-term normal operation of the outdoor heat exchanger 2.
When the air conditioner receives a demand instruction for heating or defrosting from a user, the controller thereof opens the drain switch valve 215, turns off the water pump 25 (i.e., the evaporative cooling heat exchanger 22 is converted into the air-cooling heat exchanger 21), and starts the compressor 1. Meanwhile, the liquid refrigerant after heat exchange with the indoor air, heat release and condensation sequentially flows through the evaporative cooling heat exchanger 22 and the air cooling heat exchanger 21, sensible heat exchange between the air and the refrigerant is realized, and the refrigerant absorbs heat and evaporates into a gaseous refrigerant and then flows back to the compressor 1. Meanwhile, the condensed water or defrosted water generated on the surface of the evaporative cooling heat exchanger 22 sinks onto the water-receiving tray 7, and the condensed water or defrosted water on the water-receiving tray 7 naturally flows into the external water pipe 212 from the second water outlet located at the lower position due to the opening of the drain switch valve 215, and is finally discharged out of the housing 20 from the external water pipe 212.
Obviously, after the drainage mechanism is added to the evaporative cooling heat exchanger 22 of this embodiment, not only can the refrigeration of the air conditioner in summer be realized, the water in the water pan 7 is recycled to provide the cooling water for spraying for the evaporative cooling heat exchanger 22, but also during the heating or defrosting in winter, the condensed water or defrosting water in the water pan 7 is directly drained out of the casing 20 in time, thereby avoiding the problem that the drainage is not efficient due to the freezing of the accumulated water in the water pan 7, and simultaneously preventing the condensed water or defrosting water from entering the water tank 24 to cause the freezing damage of the water pipe and the water pump 25 communicated with the water tank 24 due to the freezing.
With continued reference to fig. 2a and 2b, when the water is deposited on the water pan 7 after washing the heat exchanger body, it will carry away dirt such as dust on the heat exchanger body, and the dirt may be discharged into the water tank 24 directly, for this reason, the evaporative cooling heat exchanger 22 is further provided with a drain pipe 27, one port of the drain pipe 27 is communicated with the water tank 24, the other port of the drain pipe 27 penetrates through the housing 20 and extends out of the housing 20, and a drain valve 28 is provided on the drain pipe 27 to close or open the drain pipe 27. The user can open the blowoff valve 28 periodically according to the water quality to discharge the sewage in the water tank 24, so as to prevent the water in the water tank 24 from being too much of impurity, and the problem that the water is pumped into the spray pipe 23 to cause the blockage of the spray nozzle or the spray head.
As described above, in summer, when the air conditioner of the present embodiment cools, the spray pipe 23 is communicated with the water tank 24 through the water pump 25, so that the water pump 25 in the water tank 24 enters the spray pipe 23 to spray to the evaporative cooling heat exchanger 22, and the cooling water in the water tank 24 is mainly the cooling water sprayed from the water receiving tray 7, and when the cooling water is sprayed to the evaporative cooling heat exchanger 22, the cooling water exchanges heat with the refrigerant therein to absorb heat, and after the cooling water absorbs heat, part of the evaporation forms water vapor and is discharged from the air outlet to the outside of the casing 20 under the action of the fan 8, and the other part exists in a liquid state and is collected on the water receiving tray 7.
For this purpose, with continued reference to fig. 2a and 2b, the evaporative cooling heat exchanger 22 in this embodiment further includes a water replenishing mechanism including a water level detecting element, a water replenishing pipe 29 and a water replenishing valve 211, wherein the water level detecting element is configured to detect the water level in the water receiving tray 7, a water inlet of the water replenishing pipe 29 is communicated with an external water replenishing device, which may be a water tank 24 or the like, a water outlet of the water replenishing pipe 29 is connected with the water receiving tray 7, and the water replenishing valve 211 is disposed on the water replenishing pipe 29 and is configured to selectively open or close the water replenishing pipe 29 according to a comparison result of a magnitude relationship between the water level in the water receiving tray 7 and a water level threshold. The water level detection element and the water replenishing valve 211 are in communication connection with a controller of the air conditioner, when the actual water level in the water receiving tray 7 is lower than a preset water level threshold value, the controller sends an instruction to the water replenishing valve 211, the water replenishing valve 211 is communicated with the water replenishing pipe 29 to start water replenishing, water in external water replenishing equipment is replenished into the water receiving tray 7 through the water replenishing pipe 29, when the water level in the water receiving tray 7 reaches the preset water level threshold value, the controller sends an instruction to the water replenishing valve 211, the water replenishing valve 211 closes the water replenishing pipe 29, and water replenishing is stopped.
The liquid level detecting element 210 in this embodiment is preferably a float valve or a liquid level sensor.
In addition, the evaporative cooling heat exchanger includes a softening device 217 and a filter 218, and the softening device 217 and the filter 218 are provided on the makeup water pipe 29 and on the upstream side of the makeup water valve 211 so as to soften and filter the cooling water before it is supplied to the water receiving tray 7 to remove particles, foreign substances, or the like in the cooling water and prevent the foreign substances from flowing into the shower pipe 23 to block the shower head or the nozzle.
With continued reference to fig. 2a, the water pan 7 divides the casing 20 of the outdoor unit into an upper chamber 1u and a lower chamber 1x, the air-cooled heat exchanger 21, the heat exchanger body of the evaporative cooling heat exchanger 22 and the shower pipe 23 are located in the upper chamber 1u, the water tank 24 and the water pump 25 of the evaporative cooling heat exchanger 22 are located in the lower chamber 1x, and the electrical components of the compressor, the electronic expansion valve and the four-way reversing valve of the outdoor unit are also located in the lower chamber 1 x. It can be seen that in the present embodiment, the electrical components, the evaporative cooling heat exchanger 22, the spraying pipes 23 thereof, and the like are placed in different chambers, so that the problem of damage caused by water spraying of the electrical components can be avoided, and normal operation of the electrical components can be ensured.
Example two:
compared with the first embodiment, the evaporative cooling heat exchanger 22 of the second embodiment is different only in the specific structure of the drainage mechanism, and other features are the same. For the convenience of understanding and brevity of description, only different points will be described in detail below with reference to fig. 3a and 3b, and the description of the same parts and their technical effects will not be repeated. Fig. 3a is a schematic structural diagram of an outdoor unit according to a second embodiment of the present invention, and fig. 3B is an enlarged schematic partial structure at B of fig. 3 a.
Referring to fig. 3a and 3b, in the present embodiment, the drainage mechanism of the evaporative cold heat exchanger 22 includes a two-position three-way directional valve 216, wherein a first port thereof communicates with the water pan 7, a second port thereof communicates with the water tank 24, and a third port thereof communicates with the external water pipe 212. The two-position, three-way directional valve 216 includes a first operating position and a second operating position; when the valve is positioned at the first working position, the first port and the second port of the valve are communicated, and the third port of the valve is cut off; when the switch is located at the second working position, the first port and the third port are conducted, and the second port is cut off.
When the air conditioner receives a demand instruction of refrigeration of a user, the controller controls the two-position three-way reversing valve 216 to be located at the first working position, the two-position three-way reversing valve 216 is communicated with the water receiving tray 7 and the water tank 24, the water pump 25 is started, the compressor 1 is started, cooling water in the water tank 24 is pumped into the spray pipe 23 through the water delivery pipe 26 by the water pump 25, and is sprayed onto the surface of the evaporative cooling heat exchanger 22 through the spray head or the nozzle, the cooling water absorbs heat emitted by a refrigerant in the evaporative cooling heat exchanger 22 and then descends to the water receiving tray 7, the cooling water in the water receiving tray 7 flows into the water tank 24 through the two-position three-way reversing valve 216, and is pumped into the spray pipe 23 again by the water pump 25. Meanwhile, the high-temperature and high-pressure gaseous refrigerant in the compressor 1 firstly flows through the air-cooled heat exchanger 21, so that the sensible heat exchange between air and the refrigerant is realized, and the temperature of the refrigerant steam is reduced; and the evaporative cooling heat exchanger 22 is used for realizing the simultaneous heat exchange of air, water and refrigerant, thereby improving the refrigeration efficiency and ensuring the long-term normal operation of the outdoor heat exchanger 2.
When the air conditioner receives a demand instruction of heating or defrosting from a user, the controller controls the two-position three-way reversing valve 216 to be switched from the first working position to the second working position, the two-position three-way reversing valve 216 is communicated with the water receiving disc 7 and the external water pipe 212, the water pump 25 is turned off (namely, the evaporative cooling heat exchanger 22 is converted into the air cooling heat exchanger 21), and the compressor 1 is started. Meanwhile, the liquid refrigerant after heat exchange with the indoor air, heat release and condensation sequentially flows through the evaporative cooling heat exchanger 22 and the air cooling heat exchanger 21, sensible heat exchange between the air and the refrigerant is realized, and the refrigerant absorbs heat and evaporates into a gaseous refrigerant and then flows back to the compressor 1. Meanwhile, the condensed water or defrosted water generated on the surface of the evaporative cooling heat exchanger 22 is settled onto the water-receiving tray 7, and the condensed water or defrosted water on the water-receiving tray 7 flows into the external water pipe 212 through the two-position three-way reversing valve 216 and is finally discharged out of the housing 20 through the external water pipe 212.
So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
Claims (10)
1. An outdoor unit of a cooling and heating air conditioner is characterized by further comprising a drainage mechanism, and the drainage mechanism is selectively communicated with the water receiving disc and the water tank or an external water pipe.
2. The outdoor unit of claim 1, wherein the drainage mechanism comprises a main drainage pipe, a branch drainage pipe, and a drainage switch valve, wherein a water inlet of the main drainage pipe is communicated with the drip tray, a first water outlet of the main drainage pipe is communicated with the water tank through the branch drainage pipe, a second water outlet of the main drainage pipe is communicated with the external water pipe, the water inlet, the first water outlet, and the second water outlet are sequentially arranged from top to bottom, and the drainage switch valve is disposed on the external water pipe to turn on or off the external water pipe.
3. The outdoor unit of claim 1, wherein the drainage mechanism is a two-position three-way valve, a first port of the two-position three-way valve is in communication with the drip tray, a second port of the two-position three-way valve is in communication with the water tank, a third port of the two-position three-way valve is in communication with the external water pipe, and the two-position three-way valve includes a first operating position and a second operating position:
when the two-position three-way valve is located at the first working position, the first port and the second port are communicated, and the third port is cut off;
when the two-position three-way valve is located at the second working position, the first port and the third port are communicated, and the second port is cut off.
4. The outdoor unit of any one of claims 1 to 3, wherein the evaporative cooling heat exchanger further comprises:
the liquid level detection element is used for detecting the liquid level in the water receiving tray;
the water outlet of the water replenishing pipe is communicated with the water receiving disc, and the water inlet of the water replenishing pipe is communicated with external water replenishing equipment;
and the water replenishing valve is arranged on the water replenishing pipe and used for selectively switching on or switching off the water replenishing pipe.
5. The outdoor unit of claim 4, wherein the liquid level detecting member is a ball float or a liquid level sensor.
6. The outdoor unit of claim 4, wherein the evaporation-cooled heat exchanger further comprises a softening device and a filter, the softening device and the filter being disposed on the make-up water pipe and on an upstream side of the make-up water valve.
7. The outdoor unit of any one of claims 1 to 3, wherein the evaporative cooling heat exchanger further comprises:
one port of the sewage discharge pipe is communicated with the water tank, and the other port of the sewage discharge pipe penetrates through the shell of the outdoor unit and extends out of the shell;
and the blow-down valve is arranged on the blow-down pipe and is used for closing or conducting the blow-down pipe.
8. The outdoor unit of any one of claims 1 to 3, wherein the casing of the outdoor unit is divided into an upper chamber and a lower chamber by the drip pan, the evaporative cooling heat exchanger and the shower pipe are disposed in the upper chamber, and the water tank, the water pump, the drainage mechanism, the compressor of the outdoor unit, the electronic expansion valve, and the four-way reversing valve are disposed in the lower chamber.
9. A cooling and heating air conditioner comprising an outdoor unit, wherein the outdoor unit is the outdoor unit according to any one of claims 1 to 8.
10. The air conditioner according to claim 8, further comprising a bypass branch bypassing a suction port of a compressor of the air conditioner and a liquid line of a refrigerant circulation circuit of the air conditioner, wherein the bypass branch comprises a capillary tube and a bypass switch valve connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022840578.1U CN214249876U (en) | 2020-11-30 | 2020-11-30 | Air conditioner and outdoor unit thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022840578.1U CN214249876U (en) | 2020-11-30 | 2020-11-30 | Air conditioner and outdoor unit thereof |
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| CN214249876U true CN214249876U (en) | 2021-09-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060964A (en) * | 2021-10-26 | 2022-02-18 | 广东美的制冷设备有限公司 | Air conditioner |
| CN115585507A (en) * | 2022-10-13 | 2023-01-10 | 青岛海尔空调器有限总公司 | Air conditioner indoor unit |
-
2020
- 2020-11-30 CN CN202022840578.1U patent/CN214249876U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060964A (en) * | 2021-10-26 | 2022-02-18 | 广东美的制冷设备有限公司 | Air conditioner |
| CN115585507A (en) * | 2022-10-13 | 2023-01-10 | 青岛海尔空调器有限总公司 | Air conditioner indoor unit |
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