CN104180455A - Air cooling heat pump unit - Google Patents
Air cooling heat pump unit Download PDFInfo
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- CN104180455A CN104180455A CN201410440788.8A CN201410440788A CN104180455A CN 104180455 A CN104180455 A CN 104180455A CN 201410440788 A CN201410440788 A CN 201410440788A CN 104180455 A CN104180455 A CN 104180455A
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Abstract
The invention provides an air cooling heat pump unit. By replacing an original single air cooling heat exchanger with two air cooling heat exchangers, during low-temperature water cooling, the air cooling heat pump unit can achieve the aim of reducing the area of the air cooling heat exchangers by switching off one of the air cooling heat exchangers to reduce the risk of liquid-state refrigerant returning of a system; during high-temperature water heating, the air cooling heat pump unit can control and maintain system pressure and air return temperature within a reasonable range by taking one of the air cooling heat exchangers as an evaporator and the other air cooling heat exchanger as a condenser; during low-temperature water heating and when the air cooling heat exchangers need defrosting, the air cooling heat pump unit can meet the requirements of continuously supplying hot water by defrosting one of the air cooling heat exchangers and continuing the heating process through the other air cooling heat exchanger.
Description
Technical field
The present invention relates to air-conditioning technical field, more particularly, relate to a kind of Air-Cooled Heat Pump Unit.
Background technology
Existing Air-Cooled Heat Pump Unit, air cooling heat exchanger or all make evaporimeter and use, or all make condenser and use.When cryogenic refrigeration water, air cooling heat exchanger is all used as condenser, may make like this condensation effect very good, and evaporimeter can not evaporate completely, thereby causes system to return liquid refrigerants, when serious, causes compressor to burn; When high temperature water heating, need compressor exhaust temperature high, at this moment system pressure also can be very high, and air cooling heat exchanger is all used as evaporimeter, evaporation effect is very good, causes suction temperature very high; When low-temperature heating water, when air cooling heat exchanger is used as condenser, water cooling heat exchanger is used as evaporimeter, the refrigerant of HTHP melts frost when air cooling heat exchanger condensation, and still, condensed refrigerant need to be at water cooling heat exchanger the inside evaporation endothermic, like this, the water of water cooling heat exchanger the inside has become cold water, causes unit can not continue to offer hot water demand, thereby affects user's comfortableness requirement.
Summary of the invention
The invention provides a kind of Air-Cooled Heat Pump Unit, comprise: for the compressor of cold-producing medium is provided to system, for the first air cooling heat exchanger that uses or use as condenser as heat exchanger, for the first outdoor fan to described the first air cooling heat exchanger heat exchange, for the second air cooling heat exchanger that uses or use as condenser as heat exchanger, for the second outdoor fan to described the second air cooling heat exchanger heat exchange, water cooling heat exchanger, the first cross valve, the first magnetic valve, the second magnetic valve, the 3rd magnetic valve, the 4th magnetic valve;
The quantity of described compressor is at least two, described in each, compressor can provide cold-producing medium to system simultaneously, and described compressor forms compressor bank, and the output of compressor described in each and air return end are accumulated to the output of compressor bank and the air return end of compressor bank;
The input of described water cooling heat exchanger is connected with described the first air cooling heat exchanger, described the second air cooling heat exchanger respectively;
The first end of described the first cross valve is connected with described compressor bank output, and the second end of described the first cross valve is connected with described the first air cooling heat exchanger, and described the first cross valve is used for controlling described the first air cooling heat exchanger to be used as condenser;
The entrance point of described the first magnetic valve is connected with described compressor bank output, and the port of export of described the first magnetic valve is connected with described the second air cooling heat exchanger, and described the first magnetic valve is used for controlling described the second air cooling heat exchanger to be used as condenser;
The entrance point of described the second magnetic valve is connected with described the first electromagnetic valve outlet end with described the second air cooling heat exchanger, the port of export of described the second magnetic valve is connected with the air return end of described compressor bank, and described the second magnetic valve is used for controlling described the second air cooling heat exchanger to be used as evaporimeter;
Described the 3rd entrance point of magnetic valve and the output of described water cooling heat exchanger are connected, the port of export of described the 3rd magnetic valve is connected with the air return end of the 3rd end, the 4th end and the described compressor bank of described the first cross valve, and described the 3rd magnetic valve is used for controlling described water cooling heat exchanger chilled water;
The entrance point of described the 4th magnetic valve is connected with described compressor bank output, and described the 4th port of export of magnetic valve and the output of described water cooling heat exchanger are connected, and described the 4th magnetic valve is used for controlling described water cooling heat exchanger water heating.
Preferably, also comprise: the first electric expansion valve;
Described the first air cooling heat exchanger is connected with the input of described water cooling heat exchanger by described the first electric expansion valve, and described the first electric expansion valve is for controlling the cold medium flux that flows through described the first air cooling heat exchanger.
Preferably, also comprise: the second electric expansion valve;
Described the second air cooling heat exchanger is connected with the input of described water cooling heat exchanger by described the second electric expansion valve, and described the second electric expansion valve is for controlling the cold medium flux that flows through described the second air cooling heat exchanger.
Preferably, also comprise gas-liquid separator;
The entrance point of described gas-liquid separator is with the output of described the 3rd magnetic valve, the 3rd end of the first cross valve is connected with the output of the 4th end and the second magnetic valve, and the outlet of described gas-liquid separator is connected with the air return end of described compressor bank.
Preferably, on the link circuit of the air return end of described gas-liquid separator outlet and described compressor bank, be provided with low pressure switch and low-pressure sensor;
Described low-pressure sensor detects pressure size between described gas-liquid separator outlet and described compressor bank air return end;
Described low tension switch, for according to the pressure size detecting, is controlled pipeline between the described gas-liquid separator port of export and described compressor bank air return end and is opened and turn-off.
Preferably, described compressor bank output is provided with high-pressure switch and high-pressure sensor;
Described high-pressure sensor is for detection of the pressure size of described compressor bank output;
Described high-pressure switch, for according to the pressure size detecting, is controlled described compressor bank opening and closing.
Preferably, the model of described the first air cooling heat exchanger and described the second air cooling heat exchanger is identical or different.
Preferably, the model of described the first outdoor fan and described the second outdoor fan is identical or different.
Preferably, the model of described the first magnetic valve and described the second magnetic valve is identical or different.
As can be seen from the above technical solutions, the present invention has the following advantages:
The present invention is by replacing two air cooling heat exchangers an original air cooling heat exchanger, make Air-Cooled Heat Pump Unit when cryogenic refrigeration water, by cutting off an air cooling heat exchanger, reach the object that reduces air cooling heat exchanger area, thereby reduction system is returned the risk of liquid refrigerants; When Air-Cooled Heat Pump Unit is during at high temperature water heating, by using an air cooling heat exchanger as evaporimeter, a heat exchanger is as condenser, realizes system pressure and suction temperature are controlled and maintained in the reasonable scope; When Air-Cooled Heat Pump Unit is during at low-temperature heating water, the in the situation that of needing defrost after water cooling heat exchanger frosting, by by an air cooling heat exchanger defrost, an air cooling heat exchanger continues to heat, meet unit and can continue to provide the demand of hot water, thereby guaranteed user's comfort level.Therefore, Air-Cooled Heat Pump Unit provided by the invention effectively improves the reliability of Air-Cooled Heat Pump Unit when cryogenic refrigeration water, high temperature water heating and low-temperature heating water.
In the present invention, the output of water cooling heat exchanger is connected with the port of export of the 4th magnetic valve with the entrance point of the 3rd magnetic valve, the port of export of the 3rd magnetic valve is connected with the air return end of the 3rd end, the 4th end and the described compressor bank of described the first cross valve, refrigerant is after water cooling heat exchanger evaporation endothermic or condensation like this, complete refrigeration or heat process, and by the 3rd magnetic valve, getting back to compressor bank and complete circulation.Because refrigerant is after water cooling heat exchanger evaporation endothermic or condensation, directly by the 3rd magnetic valve, get back to compressor bank and complete circulation, improved the chilled water of Air-Cooled Heat Pump Unit or the efficiency of water heating, reduce the cost of chilled water or water heating.Water cooling heat exchanger is directly connected with the 3rd magnetic valve, optimizes the structure of Air-Cooled Heat Pump Unit, has avoided causing affecting the reduction of unit cycle efficieny, the defect that fault rate increases due to other valves or control assembly being set between water cooling heat exchanger and the 3rd magnetic valve.
In the present invention, the entrance point of the 4th magnetic valve is connected with compressor bank output, the 4th port of export of magnetic valve and the output of water cooling heat exchanger are connected, the 4th magnetic valve is directly connected with water cooling heat exchanger and controls water cooling heat exchanger water heating, the refrigerant that compressor provides is directly supplied with water cooling heat exchanger through the 4th magnetic valve, by-pass valve control and control program in the middle of reducing, simplified the control program of water heating, optimize the structure of Air-Cooled Heat Pump Unit, avoided causing affecting the reduction of unit cycle efficieny due to other valves or control assembly being set between water cooling heat exchanger and the 4th magnetic valve, the defect that fault rate increases.
Term " first " in description of the present invention and claims and above-mentioned accompanying drawing, " second ", " the 3rd " " 4th " etc. (if existence) are for distinguishing similar object, and needn't be for describing specific order or precedence.The data that should be appreciated that such use suitably can exchanged in situation, so as embodiments of the invention described herein can with except diagram here or describe those order enforcement.In addition, term " comprises " and " having " and their any distortion, is intended to be to cover not exclusive comprising.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, to the accompanying drawing of required use in describing be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the disclosed a kind of Air-Cooled Heat Pump Unit of the embodiment of the present invention.
The specific embodiment
For making goal of the invention of the present invention, feature, advantage can be more obvious and understandable; to use specific embodiment and accompanying drawing below; technical scheme to the present invention's protection is clearly and completely described; obviously; the embodiments described below are only the present invention's part embodiment, but not whole embodiment.Embodiment based in this patent, those of ordinary skills are not making all other embodiment that obtain under creative work prerequisite, all belong to the scope of this patent protection.
The present embodiment provides a kind of Air-Cooled Heat Pump Unit, refer to shown in Fig. 1, comprise: for the compressor of cold-producing medium is provided to system, for the first air cooling heat exchanger 2 that uses or use as condenser as heat exchanger, for the first outdoor fan 3 to described the first air cooling heat exchanger 2 enhanced heat exchanges, for the second air cooling heat exchanger 4 that uses or use as condenser as heat exchanger, for the second outdoor fan 5 to described the second air cooling heat exchanger semi-finals heat exchange, water cooling heat exchanger 6, the first cross valve 7, the first magnetic valve 8, the second magnetic valve 10, the 3rd magnetic valve 15, the 4th magnetic valve 16,
The quantity of described compressor is at least two, described in each, compressor can provide cold-producing medium to system simultaneously, and described compressor forms compressor bank 1, and the output of compressor described in each and air return end are accumulated to the output of compressor bank 1 and the air return end of compressor bank 1;
The input of water cooling heat exchanger 6 is connected with the first air cooling heat exchanger 2, the second air cooling heat exchanger 4 respectively;
Wherein, the import of water cooling heat exchanger 6 current and exporting in Fig. 1 shown in arrow.
The first end 7D of the first cross valve 7 connects compressor bank 1 output, and the second end 7C of the first cross valve 7 connects the first air cooling heat exchanger 2, the first cross valves 7 to be used or uses as evaporimeter as condenser for controlling the first air cooling heat exchanger 2;
The entrance point of the first magnetic valve 8 is connected with compressor bank 1 output, and the port of export of the first magnetic valve 8 connects the second air cooling heat exchanger 4, the first magnetic valves 8 to be used as condenser for controlling the second air cooling heat exchanger 4;
The entrance point of the second magnetic valve 10 connects the common end of the second air cooling heat exchanger 4 and first magnetic valve 8 ports of export, the port of export of described the second magnetic valve 10 is connected with the air return end of described compressor bank 1, and the second magnetic valve 10 uses as evaporimeter for controlling the second air cooling heat exchanger 4;
The entrance point of the 3rd magnetic valve 15 connects the output of water cooling heat exchanger 6, the port of export of the 3rd magnetic valve 15 is connected with the 3rd end 7E, the 4th end 7S of the first cross valve 7 and the air return end of compressor bank 1, and the 3rd magnetic valve 15 is for controlling water cooling heat exchanger 6 chilled water;
The entrance point of the 4th magnetic valve 16 connects compressor bank 1 output, and the port of export of the 4th magnetic valve 16 connects the output of water cooling heat exchanger 6, and the 4th magnetic valve 16 is for controlling water cooling heat exchanger 6 water heatings.
It should be noted that, cross valve (for example above-mentioned the first cross valve 7) in power down, first end D and the second end C conducting, the 3rd end E and the 4th end S conducting; Cross valve when powering on, first end D and the 3rd end E conducting, the 3rd end E and the 4th end S conducting.
Preferably, in the present embodiment, water cooling heat exchanger 6 can be plate type heat exchanger, double-tube heat exchanger or shell and tube exchanger etc.
In summary it can be seen, the present invention, by two air cooling heat exchangers being replaced to an original air cooling heat exchanger, makes Air-Cooled Heat Pump Unit when cryogenic refrigeration water, by cutting off an air cooling heat exchanger, reach the object that reduces air cooling heat exchanger area, thereby reduction system is returned the risk of liquid refrigerants; When Air-Cooled Heat Pump Unit is during at high temperature water heating, by using an air cooling heat exchanger as evaporimeter, a heat exchanger is as condenser, realizes system pressure and suction temperature are controlled and maintained in the reasonable scope; When Air-Cooled Heat Pump Unit is during at low-temperature heating water, the in the situation that of needing defrost after water cooling heat exchanger frosting, by by an air cooling heat exchanger defrost, an air cooling heat exchanger continues to heat, meet unit and can continue to provide the demand of hot water, thereby guaranteed user's comfort level.Therefore, Air-Cooled Heat Pump Unit provided by the invention effectively improves the reliability of Air-Cooled Heat Pump Unit when cryogenic refrigeration water, high temperature water heating and low-temperature heating water.
In the present invention, the output of water cooling heat exchanger 6 is connected with the port of export of the 4th magnetic valve 16 with the entrance point of the 3rd magnetic valve 15, the port of export of the 3rd magnetic valve 15 is connected with the 3rd end 7E, the 4th end 7S of described the first cross valve 7 and the air return end of described compressor bank 1, refrigerant is after water cooling heat exchanger 6 evaporation endothermics or condensation like this, complete refrigeration or heat process, and by the 3rd magnetic valve 15, getting back to compressor bank 1 and complete circulation.Because refrigerant is after water cooling heat exchanger 6 evaporation endothermics or condensation, directly by the 3rd magnetic valve 15, get back to compressor bank 1 and complete circulation, improved the chilled water of Air-Cooled Heat Pump Unit or the efficiency of water heating, reduce the cost of chilled water or water heating.Water cooling heat exchanger 6 is directly connected with the 3rd magnetic valve 15, optimize the structure of Air-Cooled Heat Pump Unit, avoided causing affecting the reduction of unit cycle efficieny, the defect that fault rate increases due to other valves or control assembly being set between water cooling heat exchanger 6 and the 3rd magnetic valve 15.
In the present invention, the entrance point of the 4th magnetic valve 16 is connected with compressor bank 1 output, the port of export of the 4th magnetic valve 16 is connected with the output of water cooling heat exchanger 6, the 4th magnetic valve 16 is directly connected with water cooling heat exchanger 6 and controls water cooling heat exchanger 6 water heatings, the refrigerant that compressor provides is directly supplied with water cooling heat exchanger 6 through the 4th magnetic valve 16, by-pass valve control and control program in the middle of reducing, simplified the control program of water heating, optimize the structure of Air-Cooled Heat Pump Unit, avoided causing affecting the reduction of unit cycle efficieny due to other valves or control assembly being set between water cooling heat exchanger 6 and the 4th magnetic valve 16, the defect that fault rate increases.
It will be understood by those skilled in the art that, for guaranteeing that the first air cooling heat exchanger 2 and the second air cooling heat exchanger 4 have good refrigeration when using as condenser, or there is good heating effect while using as evaporimeter, therefore, control that to flow through the cold medium flux of the first air cooling heat exchanger 2 and the second air cooling heat exchanger 4 most important.
Therefore, the first air cooling heat exchanger 2 is connected with the input of water cooling heat exchanger 6 by the first electric expansion valve 12, and the first electric expansion valve 12 is for controlling the cold medium flux that flows through the first air cooling heat exchanger 2.
In like manner, the second air cooling heat exchanger 4 is connected with the input of water cooling heat exchanger 6 by the second electric expansion valve 13, and the second electric expansion valve 13 is for controlling the cold medium flux that flows through the second air cooling heat exchanger 4.
For further optimizing above-described embodiment, also comprise: gas-liquid separator 14; The entrance point of gas-liquid separator 14 is connected with the output of the output of the 3rd magnetic valve 15, the 3rd end 7E of the first cross valve 7, the 4th end 7S and the second magnetic valve 10, and the outlet of gas-liquid separator 14 is connected with the air return end of compressor bank 1.Gas-liquid separator 14 is for carrying out gas-liquid separation to flowing into the air return end gaseous coolant of compressor bank 1.
Air-Cooled Heat Pump Unit is specific as follows in the loop control of chilled water and water heating:
During Air-Cooled Heat Pump Unit chilled water, the first cross valve 7 power down, the first magnetic valve 8 powers on, the second magnetic valve 10 power down, the 3rd magnetic valve 15 powers on, the 4th magnetic valve 16 power down, the first electric expansion valve 12 and the second electric expansion valve 13 are opened under the control of electric-control system, a refrigerant part for the HTHP that compressor bank 1 is got rid of to the first air cooling heat exchanger 2 condensations by the first electric expansion valve 12 reducing pressure by regulating flows, a part to the second air cooling heat exchanger 4 condensations by the second electric expansion valve 13 reducing pressure by regulating flows, liquid refrigerants after the first air cooling heat exchanger 2 and the second air cooling heat exchanger 4 reducing pressure by regulating flows is to water cooling heat exchanger 6 devaporation heat absorptions, after evaporation endothermic, become gaseous coolant and get back to gas-liquid separator 14 through the 3rd magnetic valve 15, finally get back to compressor bank 1 and complete kind of refrigeration cycle, reach the object of Air-Cooled Heat Pump Unit chilled water.
During Air-Cooled Heat Pump Unit water heating, the first cross valve 7 powers on, the first magnetic valve 8 power down, the second magnetic valve 10 powers on, the 3rd magnetic valve 15 power down, the 4th magnetic valve 16 powers on, and the first electric expansion valve 12, the second electric expansion valve 13 are opened under the control of electric-control system.The refrigerant of the HTHP that compressor bank 1 is got rid of arrives water cooling heat exchanger 6 condensations after the 4th magnetic valve 16, a part is got back to gas-liquid separator 14 through the first cross valve 7 after the first electric expansion valve 12 reducing pressure by regulating flows after the first air cooling heat exchanger 2 evaporation endothermics, a part is got back to gas-liquid separator 14 through the second magnetic valve 10 after the second electric expansion valve 13 reducing pressure by regulating flows after the second air cooling heat exchanger 4 evaporation endothermics, finally get back to compressor bank 1 and complete and heat circulation, reach the object of water heating.
It should be noted that, because the first cross valve 7 powers on, the first end 7D of the first cross valve 7 and the 3rd end 7E conducting, the HTHP refrigerant that compressor bank 1 is got rid of is fallen by capillary pipe plug the first cross valve 7 is interior, and the excessively a small amount of refrigerant of refrigeration stream is got back to gas-liquid separator 14 through capillary.
The detailed process that Air-Cooled Heat Pump Unit disclosed by the invention improves the reliability of Air-Cooled Heat Pump Unit when cryogenic refrigeration water, high temperature water heating and low-temperature heating water is as follows:
When Air-Cooled Heat Pump Unit cryogenic refrigeration water, air-cooled side environment temperature is low, does not need all to do condenser, now, can close an air-cooled side heat exchanger, such as closing the second air cooling heat exchanger 4.Air-Cooled Heat Pump Unit the first cross valve 7 power down, the first magnetic valve 8 power down, the second magnetic valve 10 powers on, and the 3rd magnetic valve 15 powers on, the 4th magnetic valve 16 power down, the first electric expansion valve 12 is opened under the control of electric-control system, and the second electric expansion valve 13 is closed.The refrigerant of the HTHP that compressor bank 1 is got rid of all to the first air cooling heat exchanger 2 condensations by the first electric expansion valve 12 reducing pressure by regulating flows, the liquid refrigerants of refrigerant after the first air cooling heat exchanger 2 reducing pressure by regulating flows is to water cooling heat exchanger 6 devaporation heat absorptions, after evaporation endothermic, become gaseous coolant and get back to gas-liquid separator 14 through the 3rd magnetic valve 15, finally get back to compressor bank 1 and complete kind of refrigeration cycle, reach the object of Air-Cooled Heat Pump Unit chilled water.Also guaranteed the system reliability of chilled water under low ambient temperature simultaneously.
It should be noted that, because the second electric expansion valve 13 is closed, and the first magnetic valve 8 cuts out, and the second magnetic valve 10 is opened, refrigerant in the second air cooling heat exchanger 4 is got back to gas-liquid separator 14 after the second magnetic valve 10, and refrigerant is namely equivalent to not circulate in the second air cooling heat exchanger 4.
When Air-Cooled Heat Pump Unit high temperature water heating, water cooling heat exchanger 6 is made condenser, and air cooling heat exchanger is made evaporimeter, air-cooled side environment temperature is high, and evaporation effect is good, and compressor bank 1 delivery temperature is high, pressure at expulsion is high, can increase condenser area like this, reduce evaporator area.Such as using the first air cooling heat exchanger 2 as evaporimeter, the second air cooling heat exchanger 4 is as condenser, and water cooling heat exchanger 6 is as condenser.Control procedure is as follows: the first cross valve 7 power down, the first magnetic valve 8 powers on, the second magnetic valve 10 power down, the 3rd magnetic valve 15 power down, the 4th magnetic valve 16 powers on, the first electric expansion valve 12, the second electric expansion valve 13 is opened under the control of electric-control system, the HTHP refrigerant part that compressor bank 1 is got rid of arrives the interior condensation of water cooling heat exchanger 6 after the 4th magnetic valve 16, a part after the first magnetic valve 8 to after the second air cooling heat exchanger 4 condensations through the second electric expansion valve 13, two-way refrigerant is finally joined between the second electric expansion valve 13 and the first electric expansion valve 12.Then after the first electric expansion valve 12 reducing pressure by regulating flows, to getting back to after the first cross valve 7 after the interior evaporation endothermic of the first air cooling heat exchanger 2, get back to compressor bank 1 after gas-liquid separator 14 and complete whole refrigerant circulation.
When Air-Cooled Heat Pump Unit low-temperature heating water, basic controlling process is during referring to above-mentioned Air-Cooled Heat Pump Unit water heating, but because air-cooled side environment temperature is low, air cooling heat exchanger meeting frosting, if two air cooling heat exchangers (the first air cooling heat exchanger 2 and the second air cooling heat exchanger 4) defrost simultaneously, can cause the water in water cooling heat exchanger 6 to become cold water, can have influence on like this Air-Cooled Heat Pump Unit and can not continue water heating, affect user's comfortableness.When air cooling heat exchanger needs defrost, can allow an air cooling heat exchanger make condenser and defrost, an air cooling heat exchanger is made evaporimeter, thereby guarantees that electric-control system continues water heating.The specifically cyclic process when the high temperature water heating referring to Air-Cooled Heat Pump Unit of air cooling heat exchanger defrost process repeats no more herein.
In summary it can be seen, the present invention, by two air cooling heat exchangers being replaced to an original air cooling heat exchanger, makes Air-Cooled Heat Pump Unit when cryogenic refrigeration water, by cutting off an air cooling heat exchanger, reach the object that reduces air cooling heat exchanger area, thereby reduction system is returned the risk of liquid refrigerants; When Air-Cooled Heat Pump Unit is during at high temperature water heating, by using an air cooling heat exchanger as evaporimeter, a heat exchanger is as condenser, realizes system pressure and suction temperature are controlled and maintained in the reasonable scope; When Air-Cooled Heat Pump Unit is during at low-temperature heating water, the in the situation that of needing defrost after water cooling heat exchanger frosting, by by an air cooling heat exchanger defrost, an air cooling heat exchanger continues to heat, meet unit and can continue to provide the demand of hot water, thereby guaranteed user's comfort level.Therefore, Air-Cooled Heat Pump Unit provided by the invention effectively improves the reliability of Air-Cooled Heat Pump Unit when cryogenic refrigeration water, high temperature water heating and low-temperature heating water.
It will be appreciated by persons skilled in the art that hypertonia or the too low stable operation that all can affect Air-Cooled Heat Pump Unit in Air-Cooled Heat Pump Unit.Therefore, the present invention is for guaranteeing the reliable and stable operation of Air-Cooled Heat Pump Unit, in the above-described embodiments:
On the link circuit of the air return end of described gas-liquid separator 14 outlets and described compressor bank 1, be provided with low pressure switch 21 and low-pressure sensor 20;
Described low-pressure sensor 20 detects pressure size between described gas-liquid separator 14 outlets and described compressor bank 1 air return end;
Described low tension switch 21, for according to the pressure size detecting, is controlled pipeline between described gas-liquid separator 14 ports of export and described compressor bank 1 air return end and is opened and turn-off.
When the gas pressure between gas-liquid separator 14 outlet and compressor bank 1 air return end is during lower than preset value; the preset value here can be set according to the actual needs of Air-Cooled Heat Pump Unit chilled water or water heating; low pressure switch 21 disconnects automatically; and send a pressure signal to electric-control system; thereby electric-control system is taked corresponding safeguard measure according to the pressure signal receiving; for example, turn off compressor bank 1.
Certainly all right; the system low-voltage pressure that Air-Cooled Heat Pump Unit can also be fed back by real-time detection low-pressure sensor 20; after the logic control computing of participation system, make corresponding control or protection; such as low pressure being detected, by logical operation, adjust in real time the aperture size of the first electric expansion valve 12 and the second electric expansion valve 13.
In the present embodiment, compressor bank 1 output is provided with high-pressure switch 22 and high-pressure sensor 23; Described high-pressure sensor 23 is for detection of the pressure size of described compressor bank 1 output; Described high-pressure switch 22, for according to the pressure size detecting, is controlled described compressor bank 1 opening and closing.
When the pressure of the gas of compressor bank 1 output was looked into preset value; high-pressure switch 22 disconnects automatically, and sends a pressure signal to electric-control system, thereby electric-control system is taked corresponding safeguard measure according to the pressure signal receiving; for example, turn off compressor bank 1.
Certainly the system high pressure pressure that Air-Cooled Heat Pump Unit can also be fed back by real-time detection high-pressure sensor 23; after the logic control computing of participation system, make corresponding control or protection; such as high-pressure being detected, by logical operation, adjust in real time the aperture size of the first electric expansion valve 12 and the second electric expansion valve 13.
It should be noted is that, in above-described embodiment, the model of the first air cooling heat exchanger 2 and the second air cooling heat exchanger 4 can be identical, also can be different.Wherein, preferred same model.The model of the first outdoor fan 3 and the second outdoor fan 5 can be identical, also can be different, do not limit herein.The identical or different model of model of the first magnetic valve 8 and the second magnetic valve 10 does not limit herein.
In this description, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.
Claims (9)
1. an Air-Cooled Heat Pump Unit, it is characterized in that, comprise: for the compressor of cold-producing medium is provided to system, for the first air cooling heat exchanger that uses or use as condenser as heat exchanger, for the first outdoor fan to described the first air cooling heat exchanger heat exchange, for the second air cooling heat exchanger that uses or use as condenser as heat exchanger, for the second outdoor fan to described the second air cooling heat exchanger heat exchange, water cooling heat exchanger, the first cross valve, the first magnetic valve, the second magnetic valve, the 3rd magnetic valve, the 4th magnetic valve;
The quantity of described compressor is at least two, described in each, compressor can provide cold-producing medium to system simultaneously, and described compressor forms compressor bank, and the output of compressor described in each and air return end are accumulated to the output of compressor bank and the air return end of compressor bank;
The input of described water cooling heat exchanger is connected with described the first air cooling heat exchanger, described the second air cooling heat exchanger respectively;
The first end of described the first cross valve is connected with described compressor bank output, and the second end of described the first cross valve is connected with described the first air cooling heat exchanger, and described the first cross valve is used for controlling described the first air cooling heat exchanger to be used as condenser;
The entrance point of described the first magnetic valve is connected with described compressor bank output, and the port of export of described the first magnetic valve is connected with described the second air cooling heat exchanger, and described the first magnetic valve is used for controlling described the second air cooling heat exchanger to be used as condenser;
The entrance point of described the second magnetic valve is connected with described the first electromagnetic valve outlet end with described the second air cooling heat exchanger, the port of export of described the second magnetic valve is connected with the air return end of described compressor bank, and described the second magnetic valve is used for controlling described the second air cooling heat exchanger to be used as evaporimeter;
Described the 3rd entrance point of magnetic valve and the output of described water cooling heat exchanger are connected, the port of export of described the 3rd magnetic valve is connected with the air return end of the 3rd end, the 4th end and the described compressor bank of described the first cross valve, and described the 3rd magnetic valve is used for controlling described water cooling heat exchanger chilled water;
The entrance point of described the 4th magnetic valve is connected with described compressor bank output, and described the 4th port of export of magnetic valve and the output of described water cooling heat exchanger are connected, and described the 4th magnetic valve is used for controlling described water cooling heat exchanger water heating.
2. Air-Cooled Heat Pump Unit according to claim 1, is characterized in that,
Also comprise: the first electric expansion valve;
Described the first air cooling heat exchanger is connected with the input of described water cooling heat exchanger by described the first electric expansion valve, and described the first electric expansion valve is for controlling the cold medium flux that flows through described the first air cooling heat exchanger.
3. Air-Cooled Heat Pump Unit according to claim 1, is characterized in that,
Also comprise: the second electric expansion valve;
Described the second air cooling heat exchanger is connected with the input of described water cooling heat exchanger by described the second electric expansion valve, and described the second electric expansion valve is for controlling the cold medium flux that flows through described the second air cooling heat exchanger.
4. Air-Cooled Heat Pump Unit according to claim 1, is characterized in that,
Also comprise gas-liquid separator;
The entrance point of described gas-liquid separator is with the output of described the 3rd magnetic valve, the 3rd end of the first cross valve is connected with the output of the 4th end and the second magnetic valve, and the outlet of described gas-liquid separator is connected with the air return end of described compressor bank.
5. Air-Cooled Heat Pump Unit according to claim 4, is characterized in that,
On the link circuit of the air return end of described gas-liquid separator outlet and described compressor bank, be provided with low pressure switch and low-pressure sensor;
Described low-pressure sensor detects pressure size between described gas-liquid separator outlet and described compressor bank air return end;
Described low tension switch, for according to the pressure size detecting, is controlled pipeline between the described gas-liquid separator port of export and described compressor bank air return end and is opened and turn-off.
6. Air-Cooled Heat Pump Unit according to claim 1, is characterized in that,
Described compressor bank output is provided with high-pressure switch and high-pressure sensor;
Described high-pressure sensor is for detection of the pressure size of described compressor bank output;
Described high-pressure switch, for according to the pressure size detecting, is controlled described compressor bank opening and closing.
7. Air-Cooled Heat Pump Unit according to claim 1, is characterized in that, the model of described the first air cooling heat exchanger and described the second air cooling heat exchanger is identical or different.
8. Air-Cooled Heat Pump Unit according to claim 1, is characterized in that, the model of described the first outdoor fan and described the second outdoor fan is identical or different.
9. Air-Cooled Heat Pump Unit according to claim 1, is characterized in that, the model of described the first magnetic valve and described the second magnetic valve is identical or different.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410440788.8A CN104180455A (en) | 2014-09-01 | 2014-09-01 | Air cooling heat pump unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410440788.8A CN104180455A (en) | 2014-09-01 | 2014-09-01 | Air cooling heat pump unit |
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| CN104180455A true CN104180455A (en) | 2014-12-03 |
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| CN201410440788.8A Pending CN104180455A (en) | 2014-09-01 | 2014-09-01 | Air cooling heat pump unit |
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| CN111595001A (en) * | 2020-05-18 | 2020-08-28 | 广东美的暖通设备有限公司 | Air conditioning system, control method thereof, control device thereof and readable storage medium |
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