CN100552327C - The compressor discharge pressure control device of heat pump and heat pump - Google Patents
The compressor discharge pressure control device of heat pump and heat pump Download PDFInfo
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- CN100552327C CN100552327C CNB2005100660341A CN200510066034A CN100552327C CN 100552327 C CN100552327 C CN 100552327C CN B2005100660341 A CNB2005100660341 A CN B2005100660341A CN 200510066034 A CN200510066034 A CN 200510066034A CN 100552327 C CN100552327 C CN 100552327C
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/58—Winding and joining, e.g. winding spirally helically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/8008—Component parts, details or accessories; Auxiliary operations specially adapted for winding and joining
- B29C53/8016—Storing, feeding or applying winding materials, e.g. reels, thread guides, tensioners
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
- B29C70/22—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The present invention discloses a kind of heat pump, and this heat pump comprises: compressor; The indoor and outdoors heat exchanger; Cross valve; Be installed in first and second expansion valves at indoor and outdoors heat exchanger place respectively; First and second check-valves; Accumulator; And a plurality of tube connectors, wherein, this heat pump also comprises: the shunt valve that bypass valve is installed on it, this shunt valve is connected between the tube connector and accumulator that is connecting the indoor and outdoors heat exchanger, in the heating operation of heat pump, when the vaporization function of outdoor heat exchanger descends or excessive load when being applied on the compressor, this shunt valve will be introduced into the part of refrigerant guiding accumulator of outdoor heat exchanger.
Description
Technical field
The present invention relates to heat pump, be specifically related to a kind of like this heat pump, it has accumulator entrance side conduit, this pipe extends through the discharge pipe of compressor, thereby prevent because low temperature, low pressure liquid refrigerant flows into compressor and causes compressor impaired via outdoor heat exchanger, therefore prevented that liquid refrigerant from entering accumulator and compressor, lower or when overload when outside air temperature, this heat pump maintains predetermined stress level with compressor discharge pressure, thereby constant compression machine suction pressure, and, when winter outside air temperature descend and allow and be coated with frost on the outdoor heat exchanger therefore can not carry out evaporation process the time, this heat pump can be controlled the liquid compression phenomenon, thereby prevents that compressor is damaged.
In addition, the present invention relates to the compressor discharge pressure control device of above-mentioned heat pump, when freeze load or heating load are excessive, the pressure and temperature of the cold-producing medium that this device can be discharged from compressor is reduced to the pressure and temperature level of setting, thereby balancedly keeps compressor discharge pressure and compressor suction pressure.
Background technology
Shown in Fig. 1 is the structural representation of conventional heat pump.
As shown in Figure 1, conventional heat pump comprises: compressor 10, and it is used under the heating work pattern cold-producing medium is compressed into high temperature, high-pressure gas refrigerant; Condenser, promptly indoor heat exchanger 20, and it is used for carrying out heat exchange between 10 refrigerant compressed of compressor and air (if this heat pump is the Luftgekuhlte rotierende heat pump), thereby gas refrigerant is condensed into liquid refrigerant; Expansion valve 30, it expand into low temperature, low pressure liquid refrigerant by the throttling expansion effect with high temperature, the high pressure liquid refrigerant of 20 condensations of indoor heat exchanger; Outdoor heat exchanger 40, it is used to evaporate the cold-producing medium that was expanded by expansion valve 30, thereby between the air that cold-producing medium and air blast were blown into, carry out heat exchange by the latent heat of vaporization of utilizing cold-producing medium, therefore cool off air, and gas refrigerant is back to compressor 10; And accumulator 50, its cold-producing medium that is used for collecting from outdoor heat exchanger 40 is separated into liquid refrigerant and gas refrigerant, thereby only gas refrigerant is supplied to compressor 10.
In above-mentioned heat pump, accumulator 50 is used for the cold-producing medium of outdoor heat exchanger 40 evaporations is separated into liquid refrigerant and gas refrigerant, thereby only gas refrigerant is introduced into compressor 10.In addition, accumulator 50 is used for preventing that liquid refrigerant from entering compressor 10, thereby prevents to make compressor 10 be damaged owing to the compression of liquid refrigerant.
When cold-producing medium circulation time in heat pump, gas refrigerant is transformed into liquid refrigerant, and liquid refrigerant is transformed into gas refrigerant again then.Conversion operations between heating work pattern and the refrigeration work pattern is finished by the cross valve in the heat pump 60.This heat pump is such system, and it provides the high temperature heating source as carrying out the necessary thermal source of heating operation.
Yet, in conventional heat pump, be difficult to provide this high temperature heating source.Although conventional heat pump provides the high temperature heating source, the amount of heating source is very little.In addition, conventional heat pump provides the high temperature heating source off and on.Therefore, when winter, outside air temperature descended, the rapid variation of heat pump performance, thus the temperature of heating source is reduced.And the evaporating pressure and the specific volume that have been introduced into the cold-producing medium in the compressor have increased, thereby allow the pressure ratio of compressor discharge pressure and evaporating pressure increase.Therefore, reduced the compression efficiency of heat pump, and compressor temperature raises excessively and cause compressor to be damaged.Particularly, condenser is worked under high temperature, high pressure to produce the high temperature heating source, therefore, excessive load has been imposed on compressor.The result is that compressor is damaged.
And, along with the reduction of evaporating pressure and the rising of condensing pressure, the rapid variation of heat pump performance, and the running power of compressor increases.Therefore, compressor is impaired, and the energy consumption of heat pump increases.When winter, outside air temperature descended, evaporating temperature was lower, thereby has reduced specific volume and efficient.Therefore, heat pump performance reduces, and the energy consumption of heat pump increases.Especially for conventional heat pump, when outside air temperature descended, compression ratio was that the ratio of condensing pressure and evaporating pressure increases.Therefore, the compression efficiency of compressor reduces, thereby has reduced heat pump performance.
In conventional heat pump, when overload, compressor discharge pressure and temperature are too high, thereby compressor is damaged.
Summary of the invention
Therefore, propose the present invention and solve the problems referred to above, and, the purpose of this invention is to provide a kind of like this heat pump, it has accumulator entrance side conduit, this pipe extends through the discharge pipe of compressor, thereby prevents to cause compressor impaired owing to low temperature, low pressure liquid refrigerant are introduced into compressor after via outdoor heat exchanger, has therefore prevented that liquid refrigerant from entering accumulator and compressor.
Another object of the present invention provides a kind of like this cryogenics heat pump, and in lower or when overload when outside air temperature, this heat pump can maintain compressor discharge pressure predetermined steady pressure level, thus constant compression machine suction pressure.
Another purpose of the present invention provides a kind of like this cryogenics heat pump, when along with winter outside air temperature descend and allow and be coated with frost on the outdoor heat exchanger therefore can not carry out evaporation process the time, this heat pump can be controlled the liquid compression phenomenon, thereby prevents that compressor is damaged.
Further object of the present invention provides the compressor discharge pressure control device of above-mentioned heat pump, when freeze load or heating load are excessive, the excess pressure and the temperature of the cold-producing medium that this device can be discharged from compressor are reduced to predetermined steady pressure and temperature levels, thereby balancedly keep compressor discharge pressure and compressor suction pressure.
According to an aspect of the present invention, provide a kind of like this heat pump, it comprises: compressor; The indoor and outdoors heat exchanger, they come condensation or evaporation by the cold-producing medium of compressor compresses according to refrigeration or heating work pattern; Cross valve, it is according to the cold-producing medium guiding indoor heat exchanger or the outdoor heat exchanger of freezing or the heating work pattern will be compressed; Be installed in first and second expansion valves at indoor and outdoors heat exchanger place respectively, they reduce the pressure of liquid refrigerant according to refrigeration or heating work model selection ground; First and second check-valves, they according to refrigeration or heating work model selection open or close, be used for liquid refrigerant first and second expansion valves that lead respectively; Accumulator, it is used to prevent that liquid refrigerant from entering the suction port of compressor; And a plurality of tube connectors, be used for compressor, the indoor and outdoors heat exchanger, cross valve, first and second expansion valves, first and second check-valves and accumulator are connected with each other, thereby allow them be interconnected, wherein, this heat pump also comprises: the shunt valve that bypass valve is installed on it, this shunt valve is connected between the tube connector and accumulator that is connecting the indoor and outdoors heat exchanger, in the heating operation of heat pump, when the vaporization function of outdoor heat exchanger descends or excessive load when being applied on the compressor, this shunt valve will be introduced into the part of refrigerant guiding accumulator of outdoor heat exchanger.
Preferably, this heat pump also comprises: a plurality of distributors, they are connected to first and second expansion valves and first and second check-valves respectively, wherein, each distributor all has a plurality of arms that are connected to corresponding indoor or outdoors heat exchanger, thereby allows the indoor or outdoors heat exchanger carry out condensation or vaporization function effectively according to refrigeration or heating work pattern.
According to a further aspect of the invention, a kind of compressor discharge pressure control device that is used for heat pump is provided, this heat pump comprises: compressor, indoor and outdoors heat exchanger, cross valve and expansion valve, wherein, this compressor discharge pressure control device comprises: the shunt valve that the refrigerant pipe top set that the cold-producing medium that compressor is discharged is flowed through comes out, and this shunt valve is connected to the refrigerant pipe that is connected between expansion valve and the indoor heat exchanger; And be installed in the On/Off device that is used to open shunt valve on the shunt valve, when the discharge pressure of compressor is too high, this On/Off device will be introduced into a part of gas refrigerant guiding indoor heat exchanger of outdoor heat exchanger.
Preferably, above-mentioned On/Off device comprises: the apparatus main body with entrance and exit; Be installed in the discharge pressure adjustable plate in the apparatus main body, it utilizes the pressure that is introduced into the gas refrigerant in the apparatus main body by inlet to open or close outlet; And spring, the one end is connected to the apparatus main body inboard, and the other end is connected to the discharge pressure adjustable plate, and this spring is towards inlet resiliency supported discharge pressure adjustable plate.
Preferably, above-mentioned compressor discharge pressure control device also comprises: be installed in the auxiliary expansion valve on the refrigerant pipe, it is connected to the outlet of On/Off device, be used for high temperature, high-pressure gas refrigerant being expand into low temperature, low-pressure refrigerant gas, subsequently this low temperature, low-pressure refrigerant gas be introduced into indoor heat exchanger by the throttling expansion effect.
Description of drawings
Below by coming that in conjunction with the accompanying drawings above and other objects of the present invention, feature and other advantage are carried out more clear and specific description.
In the accompanying drawing:
What Fig. 1 showed is the structural representation of conventional heat pump;
Fig. 2 shows is structural representation according to the heat pump of first preferred embodiment of the invention;
Fig. 3 shows is structural representation according to the heat pump of second preferred embodiment of the invention;
Fig. 4 has schematically shown the distributor that is connected to outdoor heat exchanger in the heat pump according to second preferred embodiment of the invention;
Fig. 5 shows is the schematic diagram that is installed in the compressor discharge pressure control device in the heat pump according to third preferred embodiment of the invention; And
Fig. 6 is the internal structure schematic diagram according to the compressor discharge pressure control device of third preferred embodiment of the invention.
The specific embodiment
Describe the preferred embodiments of the present invention in detail below with reference to accompanying drawing.
Fig. 2 shows is structural representation according to the heat pump of first preferred embodiment of the invention.
As shown in Figure 2, the heat pump according to first preferred embodiment of the invention comprises compressor 10, indoor heat exchanger 20, expansion valve 30, outdoor heat exchanger 40, accumulator 50, cross valve 60 and a plurality of tube connector.
The check-valves 31 that is used to control the expansion valve 30 of flow of refrigerant and is used to prevent back flow of refrigerant is installed on the 3rd tube connector 3.Expansion valve 30 and check-valves 31 parallel with one another being connected on the 3rd tube connector 3.
Be adjacent to indoor heat exchanger 20 the indoor fan (not shown) is installed, air is blowed to indoor heat exchanger 20.Be adjacent to outdoor heat exchanger 40 the outdoor fan (not shown) is installed, air is blowed to outdoor heat exchanger 40.
On second tube connector 2, be installed with and have larger-diameter heat-exchanging part 110.The 5th tube connector 5 extends through heat-exchanging part 110, thereby allows low temperature, low pressure liquid refrigerant that flows to accumulator 50 and high temperature, the high-pressure gas refrigerant of discharging from compressor 10 carry out heat exchange heat-exchanging part 110.So low temperature, low pressure liquid refrigerant are evaporated, therefore, evaporated by heat-exchanging part 110 from outdoor heat exchanger 40 liquid refrigerants that discharge, that be not evaporated.So, do not have liquid refrigerant and have only gas refrigerant to be introduced in the accumulator 50.
On the outer wall position of the 5th tube connector 5 that extends through heat-exchanging part 110, be provided with a plurality of heat radiation nail 5a to promote heat exchange.
The following describes the operation that has the cryogenics heat pump of above-mentioned structure according to first preferred embodiment of the invention.
When the user when selecting the heating work pattern winter, compressor 10 turns round based on the control signal of controller (not shown), thereby low temperature, low-pressure refrigerant gas are compressed into high temperature, high-pressure gas refrigerant.Via first tube connector 1 this high temperature, high-pressure gas refrigerant are supplied to cross valve 60.
Subsequently, high temperature, high-pressure gas refrigerant flow to indoor heat exchanger 20 via second tube connector 2 from cross valve 60.By this high temperature of indoor heat exchanger 20 condensations, high-pressure gas refrigerant, make this cold-producing medium distribute heat.At this moment, indoor fan blows to indoor heat exchanger 20 with air, therefore, the heat transferred that produces in the indoor heat exchanger 20 is blown to the air of indoor heat exchanger 20.As a result, the temperature that is equipped with in the room of indoor heat exchanger rises.In this manner, realized the heating operation of heat pump.
High temperature, high-pressure refrigerant through indoor heat exchanger 20 flows to outdoor heat exchanger 40 via the 3rd tube connector 3.
The cold-producing medium that flows to outdoor heat exchanger 40, expand into low temperature, low pressure liquid refrigerant with cold-producing medium here through expansion valve 30.
Subsequently, low temperature, low pressure liquid refrigerant are supplied to outdoor heat exchanger 40, thus this low temperature, low pressure liquid refrigerant are transformed into low temperature, low-pressure refrigerant gas.
Via the 4th tube connector 4, cross valve 60 and the 5th tube connector 5, low temperature, low-pressure refrigerant gas are introduced into accumulator 50 and compressor 10.In this manner, cold-producing medium constantly circulates, and therefore, the heating operation of heat pump continues to go on.
As mentioned above, the 5th tube connector 5 extends through the heat-exchanging part 110 that is installed on second tube connector 2, and what flow through in this second tube connector 2 is high temperature, high-pressure gas refrigerant.So, utilize heat-exchanging part 110 to evaporate, thereby low temperature, low pressure liquid refrigerant are transformed into low temperature, low-pressure refrigerant gas through low temperature, the low pressure liquid refrigerant of the 5th tube connector 5, be introduced into then in the accumulator 50.Therefore, prevented that liquid refrigerant from entering accumulator 50 and compressor 10, thereby prevented that compressor 10 is damaged.
According to the present invention, utilize high temperature, the high-pressure gas refrigerant of discharging from compressor 10, therefore low temperature, the low pressure liquid refrigerant evaporation that will discharge from outdoor heat exchanger 40, significantly improved the compression efficiency of compressor 10 in winter.
Fig. 3 shows is structural representation according to the heat pump of second preferred embodiment of the invention, and Fig. 4 has schematically shown the distributor that is connected to outdoor heat exchanger in the heat pump according to second preferred embodiment of the invention.
Shown in Fig. 3 and 4, comprise according to the heat pump of second preferred embodiment of the invention: compressor 221, indoor heat exchanger 227, the first refrigerating operation distributor 232 and the first heating operation distributor 236, the second refrigerating operation distributor 237 and the second heating operation distributor 238, first expansion valve 231 and second expansion valve 235, outdoor heat exchanger 239, accumulator 244, cross valve 222 and shunt valve 260.
The first heating operation distributor 236 is installed on the 3rd tube connector 229 and is used to prevent first check-valves 230 of back flow of refrigerant to indoor heat exchanger 227.The first heating operation distributor 236 and first check-valves 230 are connected in series mutually.First expansion valve 231 and the first refrigerating operation distributor 232 with filter screen also are installed on the 3rd tube connector 229.First expansion valve 231 and the first refrigerating operation distributor 232 are connected in series mutually.On the 3rd tube connector 229, first expansion valve 231 is being connected with first check-valves 230 with the first heating operation distributor 236 in parallel with the first refrigerating operation distributor 232, with flowing of control cold-producing medium.
On the 3rd tube connector 229, also be installed with and be used to prevent second check-valves 234 and the second refrigerating operation distributor 237 of back flow of refrigerant to outdoor heat exchanger 239.Second check-valves 234 and the second refrigerating operation distributor 237 are connected in series mutually.The second heating operation distributor 238 and second expansion valve 235 with filter screen also are installed on the 3rd tube connector 229.The second heating operation distributor 238 and second expansion valve 235 are connected in series mutually.On the 3rd tube connector 229, the second heating operation distributor 238 is being connected with the second refrigerating operation distributor 237 with second check-valves 234 in parallel with second expansion valve 235, with flowing of control cold-producing medium.
Be adjacent to indoor heat exchanger 227 indoor fan 258 is installed, air is blowed to indoor heat exchanger 227.Be adjacent to outdoor heat exchanger 239 outdoor fan 259 is installed, air is blowed to outdoor heat exchanger 239.
The 3rd tube connector 229 and accumulator 244 optionally are interconnected via shunt valve 260, on this shunt valve 260 bypass valve 261 are installed.In lower or when overload when outside air temperature, the part of refrigerant that is introduced into compressor 221 via outdoor heat exchanger 239 circulates via shunt valve 260.Therefore, stablized the pressure of compressor 221.
As shown in Figure 4, distributor 237 and 238 respectively has a plurality of arms, and these arms are connected to the refrigerant pipe of outdoor heat exchanger 239, thereby allows outdoor heat exchanger 239 carry out best heat exchange.Therefore, improved heat exchanger effectiveness significantly.And, especially winter when outside air temperature is lower than subzero 15 degrees centigrade the time, evaporation process also can stably be carried out, thereby prevents to cover frost on the outdoor heat exchanger 239.Similarly, distributor 232 and 236 (as shown in Figure 3) respectively has a plurality of arms, and these arms are connected to the refrigerant pipe of indoor heat exchanger 227, thereby allows indoor heat exchanger 227 carry out best heat exchange.
The following describes the operation that has the cryogenics heat pump of above-mentioned structure according to second preferred embodiment of the invention.
In summer, when the user switched on to heat pump and selects the refrigeration work pattern, compressor 221 turned round based on the control signal of controller (not shown), thereby low temperature, low-pressure refrigerant gas are compressed into high temperature, high-pressure gas refrigerant.Via first tube connector 223 this high temperature, high-pressure gas refrigerant are supplied to cross valve 222.
Subsequently, high temperature, high-pressure gas refrigerant flow to outdoor heat exchanger 239 via the 4th tube connector 240 from cross valve 222.By this high temperature of outdoor heat exchanger 239 condensations, high-pressure gas refrigerant.Therefore, high temperature, high-pressure gas refrigerant are transformed into high temperature, high pressure liquid refrigerant, and are discharged into the outside by the heat that outdoor fan 259 distributes cold-producing medium.
High temperature, the high pressure liquid refrigerant that has flow through outdoor heat exchanger 239 flowed through and is installed in the second refrigerating operation distributor 237 and second check-valves 234 on the 3rd tube connector 229, flow through the then first refrigerating operation distributor 232 and first expansion valve 231.High temperature, high pressure liquid refrigerant expand, thereby allow the temperature and pressure of this cold-producing medium sharply descend when through first expansion valve 231.
When by indoor heat exchanger 227 with low temperature, when low pressure liquid refrigerant is transformed into gas refrigerant, low temperature, the low pressure liquid refrigerant that has flow through first expansion valve 231 absorbs the heat around this cold-producing medium.At this moment, by indoor fan 258, the air of the cooled dose absorption of heat is blown in the room that indoor heat exchanger 227 is installed.In this manner, realized the refrigerating operation of heat pump.
Subsequently, the low temperature, the low pressure refrigerant that have flow through indoor heat exchanger 227 flow to cross valve 222 via second tube connector 228, are introduced into the accumulator 244 that is installed on the 5th tube connector 245 then.In accumulator 244, cold-producing medium is separated into gas refrigerant and liquid refrigerant, then gas refrigerant is introduced in the compressor 221, and there this gas refrigerant is compressed into high temperature, high-pressure gas refrigerant.Said process repeats.
When the refrigerating operation of heat pump carried out as mentioned above, the outdoor temperature and the temperature difference that is installed with between the house interior temperature of indoor heat exchanger 227 did not influence this heat pump.Therefore, just heat pump can not occur and excessively work, and can allow heat pump carry out normal refrigerating operation.
In winter, when the user selected the heating work pattern, compressor 221 turned round based on the control signal of controller, and low temperature, low-pressure refrigerant gas are compressed into high temperature, high-pressure gas refrigerant.Via first tube connector 223 this high temperature, high-pressure gas refrigerant are supplied to cross valve 222.
Subsequently, high temperature, high-pressure gas refrigerant flow to indoor heat exchanger 227 via second tube connector 228 from cross valve 222.By indoor heat exchanger 227 condensation high temperature, high-pressure gas refrigerant, thereby allow this cold-producing medium distribute heat.At this moment, air is blowed to indoor heat exchanger 227, therefore the heat transferred that produces in the indoor heat exchanger 227 has been blown to the air of indoor heat exchanger 227 by indoor fan 258.So the temperature that is installed with in the room of indoor heat exchanger 227 raises.In this manner, realized the heating operation of heat pump.
The high temperature, the high-pressure refrigerant that have flow through indoor heat exchanger 227 flow to outdoor heat exchanger 239 via the 3rd tube connector 229.
The cold-producing medium that flows to outdoor heat exchanger 239 is through the first heating operation distributor 236 and be used to prevent first check-valves 230 of back flow of refrigerant to indoor heat exchanger 227, then through having the second heating operation distributor 238 and second expansion valve 235 of filter screen.When cold-producing medium during through second expansion valve 235, this cold-producing medium expand into low temperature, low pressure liquid refrigerant.
Subsequently, low temperature, low pressure liquid refrigerant are supplied to outdoor heat exchanger 239, thus low temperature, low pressure liquid refrigerant are transformed into low temperature, low-pressure refrigerant gas.
Via the 4th tube connector 240, cross valve 222 and the 5th tube connector 245 low temperature, low-pressure refrigerant gas are introduced into accumulator 244 and compressor 221.In this manner, cold-producing medium constantly circulates, and therefore, the heating operation of heat pump continues to carry out.
When heat pump carries out heating operation and outside air temperature when being lower than subzero 15 degrees centigrade, the evaporation process of outdoor heat exchanger 239 can not stably be carried out.Therefore, pressure descends, and covers frost on the outdoor heat exchanger 239.So, cause outdoor heat exchanger 239 can not carry out heat exchange operation fully, thereby liquid refrigerant introduced compressor.Therefore, compressor 221 is damaged.
Aforesaid in order to prevent, when outside air temperature is low, cover frost on the outdoor heat exchanger 239, perhaps when overload, alleviate load, bypass valve 261 is opened, therefore, when the liquid refrigerant that flows through the first heating operation distributor 236 and first check-valves 230 flow through the 3rd tube connector 229, a part of liquid refrigerant that has flow through the first heating operation distributor 236 and first check-valves 230 flowed to accumulator 244 via bypass valve 261.
As a result, reduced the amount of the liquid refrigerant that is introduced into outdoor heat exchanger 239, therefore, outdoor heat exchanger 239 just can be carried out heat exchange operation fully.So, prevented that compressor 221 was frozen in winter, and reduced the high pressure of outdoor heat exchanger 239.
Simultaneously, reduce the temperature and pressure of the liquid refrigerant that flows through shunt valve 260 by the 3rd expansion valve 249, therefore, low temperature, low pressure liquid refrigerant are introduced into accumulator 244, there, utilize the temperature of 239 vaporized gas cold-producing mediums of outdoor heat exchanger, low temperature, low pressure liquid refrigerant are evaporated lentamente.Subsequently, gas refrigerant is introduced into compressor 221.
Fig. 5 shows is the schematic diagram that is installed in the compressor discharge pressure control device in the heat pump according to third preferred embodiment of the invention, and Fig. 6 is the internal structure schematic diagram according to the compressor discharge pressure control device of third preferred embodiment of the invention.
As illustrated in Figures 5 and 6, the compressor discharge pressure control device according to third preferred embodiment of the invention comprises shunt valve 310 and On/Off device 320.
On/Off device 320 is installed on the shunt valve 310, when the air pressure of compressor 301 discharges is too high, this On/Off device 320 is opened shunt valve 310, thereby will be introduced into a part of gas refrigerant guiding indoor heat exchanger 302 of outdoor heat exchanger 304.
More particularly, On/Off device 320 comprises: the apparatus main body 321 with inlet 321a and outlet 321b; Be installed in the discharge pressure adjustable plate 323 in the apparatus main body 321, it utilizes the pressure that is introduced into the gas refrigerant in the apparatus main body 321 by inlet 321a to open or close outlet 321b; And spring 322, the one end is connected to apparatus main body 321 inboards, and the other end is connected to discharge pressure adjustable plate 323, and this spring is towards inlet 321a resiliency supported discharge pressure adjustable plate 323.
Yet, the invention is not restricted to the above-mentioned structure of compressor discharge pressure control device.Preferably, auxiliary expansion valve 330 is installed on the refrigerant pipe that is connected to outlet 321b, and it expand into low temperature, low-pressure refrigerant gas by the throttling expansion effect with high temperature, high-pressure gas refrigerant.The low temperature, the low-pressure refrigerant gas that were expanded by auxiliary expansion valve 330 are introduced into indoor heat exchanger 302.
Specify operation below according to the compressor discharge pressure control device with above-mentioned structure of third preferred embodiment of the invention.
When cold-producing medium circulation time in heat pump, gas refrigerant is transformed into liquid refrigerant, again liquid refrigerant is transformed into gas refrigerant then.Conversion operations between heating work pattern and the refrigeration work pattern is finished by the cross valve in the heat pump.The compressor 301 that is installed in the heat pump is used for gas refrigerant is compressed into high temperature, high-pressure gas refrigerant.
When refrigeration or the excessive and heat pump of heating load turned round for a long time, the discharge pressure of compressor 301 excessively increased, and therefore may allow compressor 301 be damaged.When the discharge pressure of compressor 301 surpasses predeterminated level, the elastic force that discharge pressure adjustable plate 323 overcomes spring 322 from inlet 321a to moving down, so inlet 321a is communicated with and exports 321b.
Therefore, a part of gas refrigerant of discharging shunt valve 310 of flowing through from compressor 301.Flow through the gas refrigerant of shunt valve 310 through auxiliary expansion valve 330.At this moment, by the throttling expansion effect high temperature, high-pressure gas refrigerant are expand into low temperature, low-pressure refrigerant gas.The low temperature, the low-pressure refrigerant gas that were expanded by auxiliary expansion valve 330 are introduced into indoor heat exchanger 302.The result is, reduced the pressure and temperature of the cold-producing medium of discharging from compressor 301, and therefore, the pressure and temperature that is introduced into the cold-producing medium of compressor 301 rises.
Because the pressure and temperature of the cold-producing medium of discharging from compressor 301 descends, thereby has prevented that compressor 301 is impaired, and the pressure and temperature of the cold-producing medium that is introduced into compressor 301 of having raise.
Can find out significantly that from above-mentioned explanation heat pump also can operate as normal when outside air temperature is low, and has prevented to enter accumulator and compressor from low temperature, low pressure liquid refrigerant that outdoor heat exchanger is discharged.Therefore, the present invention has the effect that the prevention compressor is damaged.
In addition, if when outside air temperature lower or when overload, compressor discharge pressure is maintained predetermined steady pressure level.Therefore, the present invention has the effect of constant compression machine suction pressure.
In addition, in the time of evaporation process can not being carried out when covering frost on outside air temperature decline thereby the outdoor heat exchanger in the winter time, can control the liquid compression phenomenon effectively.Therefore the present invention has the effect that the prevention compressor is damaged.
And when refrigeration load or heating load when excessive, the excess pressure and the temperature of the cold-producing medium of discharging from compressor are reduced to predetermined steady pressure and temperature levels.Therefore, the present invention has the effect of balancedly keeping compressor discharge pressure and compressor suction pressure.
Although the preferred embodiments of the present invention exemplarily have been described, to those skilled in the art, under the prerequisite that does not break away from the disclosed scope of the invention of claims and spirit, can carry out multiple modification, interpolation and replacement to the present invention.
Claims (2)
1. heat pump comprises:
Compressor;
The indoor and outdoors heat exchanger, they are according to the cold-producing medium that freezes or the heating work pattern comes condensation or vapor-compression machine to compress;
Cross valve, it is according to the cold-producing medium guiding indoor heat exchanger or the outdoor heat exchanger of freezing or the heating work pattern will be compressed;
Be installed in first and second expansion valves at indoor and outdoors heat exchanger place respectively, they reduce the pressure of liquid refrigerant according to refrigeration or heating work model selection ground;
First and second check-valves, they according to refrigeration or heating work model selection open or close, be used for liquid refrigerant first and second expansion valves that lead respectively;
Accumulator, it is used to prevent that liquid refrigerant from entering the suction port of compressor; And
A plurality of tube connectors, be used for compressor, indoor and outdoors heat exchanger, cross valve, first and second expansion valves, first and second check-valves and accumulator are connected with each other, thereby allow compressor, indoor and outdoors heat exchanger, cross valve, first and second expansion valves, first and second check-valves and accumulator be interconnected
Wherein, this heat pump also comprises:
The shunt valve of bypass valve is installed on it, this shunt valve is connected between the tube connector and accumulator that is connecting the indoor and outdoors heat exchanger, in the heating operation of heat pump, when the vaporization function of outdoor heat exchanger descends or excessive load when being applied on the compressor, this shunt valve will be introduced into the part of refrigerant guiding accumulator of outdoor heat exchanger.
2. heat pump as claimed in claim 1 also comprises:
A plurality of distributors, they are connected to first and second expansion valves and first and second check-valves respectively, wherein, each distributor all has a plurality of arms and is connected to corresponding indoor and outdoors heat exchanger, thereby allows the indoor and outdoors heat exchanger carry out condensation or vaporization function effectively according to refrigeration or heating work pattern.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040027886 | 2004-04-22 | ||
| KR1020040027883A KR20050102479A (en) | 2004-04-22 | 2004-04-22 | Structure for improving superheat degree of refrigerant in heatpump |
| KR1020040027883 | 2004-04-22 | ||
| KR1020040088480 | 2004-11-02 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200610140502XA Division CN101004304A (en) | 2004-04-22 | 2005-04-22 | Heat pump and compressor discharge pressure controlling apparatus for the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1690595A CN1690595A (en) | 2005-11-02 |
| CN100552327C true CN100552327C (en) | 2009-10-21 |
Family
ID=35346220
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100660341A Expired - Fee Related CN100552327C (en) | 2004-04-22 | 2005-04-22 | The compressor discharge pressure control device of heat pump and heat pump |
| CNA200610140502XA Pending CN101004304A (en) | 2004-04-22 | 2005-04-22 | Heat pump and compressor discharge pressure controlling apparatus for the same |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200610140502XA Pending CN101004304A (en) | 2004-04-22 | 2005-04-22 | Heat pump and compressor discharge pressure controlling apparatus for the same |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR20050102479A (en) |
| CN (2) | CN100552327C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100813052B1 (en) * | 2006-11-13 | 2008-03-14 | 엘지전자 주식회사 | Airconditioner |
| CN103003642B (en) * | 2010-07-23 | 2015-07-08 | 开利公司 | Ejector cycle |
| JP6831209B2 (en) * | 2016-10-27 | 2021-02-17 | サンデン・オートモーティブクライメイトシステム株式会社 | Vehicle air conditioner |
| CN111936804B (en) * | 2018-04-13 | 2022-02-15 | 三菱电机株式会社 | Air conditioner |
| CN109093962A (en) * | 2018-07-24 | 2018-12-28 | 安徽继宏环保科技有限公司 | A kind of construction wall fast injection molding mechanism |
-
2004
- 2004-04-22 KR KR1020040027883A patent/KR20050102479A/en not_active Application Discontinuation
-
2005
- 2005-04-22 CN CNB2005100660341A patent/CN100552327C/en not_active Expired - Fee Related
- 2005-04-22 CN CNA200610140502XA patent/CN101004304A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN101004304A (en) | 2007-07-25 |
| CN1690595A (en) | 2005-11-02 |
| KR20050102479A (en) | 2005-10-26 |
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Granted publication date: 20091021 Termination date: 20100422 |