CN105466088A - Thermostatic expansion valve and heat pump system provided with thermostatic expansion valve - Google Patents
Thermostatic expansion valve and heat pump system provided with thermostatic expansion valve Download PDFInfo
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- CN105466088A CN105466088A CN201410377942.1A CN201410377942A CN105466088A CN 105466088 A CN105466088 A CN 105466088A CN 201410377942 A CN201410377942 A CN 201410377942A CN 105466088 A CN105466088 A CN 105466088A
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Abstract
The invention provides a thermostatic expansion valve and a heat pump system provided with the thermostatic expansion valve. The thermostatic expansion valve comprises a valve body, a main valve element, a transmission rod and a one-way valve element. The valve body comprises a power head, an inlet end, an outlet end, a first valve cavity, a second valve cavity and a transmission hole. The first valve cavity and the transmission hole are both located between the power head and the second valve cavity and formed in the valve body in a mutually separated mode. The transmission hole is located in the outer side of the first valve cavity. The inlet end is communicated with the first valve cavity, the outlet end is communicated with the second valve cavity, and the outlet end is communicated with the first valve cavity through a one-way valve port. The first valve cavity is communicated with the second valve cavity through a throttling valve port. The main valve element is arranged in the second valve cavity and connected with the power head in a driven mode. A valve head of the main valve element is matched with the throttling valve port. The transmission rod is in sliding fit with the transmission hole so as to achieve driven connection between the main valve element and the power head. The one-way valve element is arranged in the first valve cavity, and a valve head of the one-way valve element is matched with the one-way valve port. A bypass structure is arranged under the circumstance that the size of the valve body is not enlarged, so that the structure of the thermostatic expansion valve is more reasonable.
Description
Technical field
The present invention relates to apparatus of air conditioning field, more specifically, relate to a kind of heating power expansion valve and the heat pump with this heating power expansion valve.
Background technology
Heat pump can freeze when summer, can heat during winter, what lean on is that the commutation of four-way change-over valve is to switch the flow direction of cold-producing medium, and reducing pressure by regulating flow is heating power expansion valve, using single heating power expansion valve to come when reducing pressure by regulating flow just there will be refrigeration can adjusting refrigerant flow rate automatically, and when heating, valve can cut off refrigerant loop.So when starting at first, in order to prevent heating power expansion valve from cutting off refrigerating circuit, in system pipeline, install a check valve additional in parallel with heating power expansion valve.Through constantly improving, occur at present the heating power expansion valve of one-way valve designs to the built-in check valve of heating power expansion valve valve inner.The heating power expansion valve of built-in check valve designs in the side of valve port and installs bypass channel additional, is a sealing gasket or a sealing block in passage.When cooling, the high pressure condensing pressure of forward is pushed by-pass prot to steel ball or sealing block and is shut valve port, and the action by spool carrys out adjust flux; When heating, reverse high pressure condensing pressure backs down the steel ball at check-valve port place or sealing block, thus opens coolant channel.Decrease leakage point, also reduce cost.
Schematic flow sheet when Fig. 1 is the heat pump refrigeration of the heating power expansion valve adopting built-in check valve in prior art.Fig. 2 is the schematic flow sheet of the heat pump shown in Fig. 1 when heating.As depicted in figs. 1 and 2, in heat pump, the import of compressor 10 ' is communicated with the second port with the first port of four-way change-over valve 20 ' respectively with outlet; The first end of indoor set 30 ' is communicated with the 3rd port of four-way change-over valve 20 ', second end of indoor set is communicated with the first end of off-premises station 40 ' by the heating power expansion valve 50 ' of two built-in check valves, and the second end of off-premises station 40 ' is communicated with the 4th port of four-way change-over valve 20 '.
As shown in Figure 1, under refrigerating state, the first port of four-way change-over valve 20 ' is communicated with the 3rd port, and the second port is communicated with the 4th port.The cold-producing medium flowed out from compressor 10 ' successively flows through four-way change-over valve 20 ', off-premises station 40 ', the heating power expansion valve 50 ' of built-in check valve, indoor set 30 ', four-way change-over valve 20 ' are got back to compressor 10 ' and formed kind of refrigeration cycle.
As shown in Figure 2, heating under state, the first port of four-way change-over valve 20 ' is communicated with the 4th port, and the second port is communicated with the 3rd port.The cold-producing medium flowed out from compressor 10 ' successively flows through four-way change-over valve 20 ', indoor set 30 ', the heating power expansion valve 50 ' of built-in check valve, off-premises station 40 ', four-way change-over valve 20 ' are got back to compressor 10 ' and formed and heat circulation.
Fig. 3 is the sectional structure schematic diagram under the heating power expansion valve of the built-in check valve of prior art is in refrigerating state.Fig. 4 is the sectional structure schematic diagram under the heating power expansion valve of the built-in check valve shown in Fig. 3 is in the state of heating.In figs. 3 and 4, the spool, 8 ' of the spool, 5 ' of the bypass flow channel, 3 ' that 1 ' to be heating power expansion valve entrance point, 2 ' be heating power expansion valve is in parallel with valve port to be the valve port, 4 ' arranged in bypass flow channel be opening and closing bypass flow channel valve is bypass pilot seal plug, 6 ' to be sealing ring, 7 ' the be automatic adjusting refrigerant flow rate of heating power expansion valve is the valve port, 9 ' of the heating power expansion valve adjusting refrigerant flow rate in parallel with bypass flow channel is that expansion valve regulates inner chamber.
As shown in Figure 3, when refrigeration system is operated in refrigerating state, the cold-producing medium of normal temperature high voltage flows in valve from heating power expansion valve entrance point 1 ', flow to valve port 8 ' and bypass flow channel 2 ', because bypass flow channel valve port 3 ' sectional area is pre-large post-small, under the effect of refrigerant high pressure, valve port 3 ' is closed by spool 4 ' automatically, normal temperature high voltage cold-producing medium all flows out from valve port 8 ', the cold-producing medium becoming Room-temperature low-pressure after reducing pressure by regulating flow flows out valve outlet port end by regulating inner chamber 9 ', is equivalent to the Flow-rate adjustment effect of general heating power expansion valve.
As shown in Figure 4, when system works is when heating state, the cold-producing medium of HTHP enters in valve from the port of export of thermal expansion valve regulation inner chamber 9 ' on the one hand, under the effect of refrigerant high pressure, active force is produced to the spool 4 ' of bypath valve, impels spool 4 ' to left movement, thus open bypath valve, cold-producing medium flows into valve entrance point 1 ' again from valve 3 ' inflow by-pass 2 ' and finally flows out valve body, thus ensures that refrigerant flow path is unimpeded.Wherein, no matter spool 7 ' is tending towards closing or opening, and restriction sectional area is far smaller than bypass sectional area, can ignore.
Realizing in process of the present invention, inventor finds, the heating power expansion valve of the built-in check valve of above prior art has following shortcoming:
Owing to needing to arrange the valve rod connecting unit head and spool in valve body, to control spool by unit head, by-pass structure has been arranged on the side of main valve chamber, and to ensure that cold-producing medium is bordering on the valve body that passes through of zero pressure drop in heating power expansion valve, by-pass sectional area and entrance point sectional area can not differ too large, virtually to increase valve volume, will parts be increased simultaneously, also just add cost;
Many by-passes, also just many possibilities of place's refrigrant leakage, and sealing gasket or sealing block will be set up, cost is relatively higher; And due to the needs of valve body process and assemble, valve body will set up pilot hole, although have sealing ring and sealing-plug to seal, add the possibility of this place's refrigrant leakage to a certain extent, add testing cost.
Summary of the invention
Heat pump, air-conditioning system that the object of the invention is to provide a kind of heating power expansion valve and has this heating power expansion valve, this heating power expansion valve can reduce the volume of heating power expansion valve.
First aspect present invention provides a kind of heating power expansion valve, comprise: valve body, described valve body comprises unit head, entrance point, the port of export, first valve pocket, second valve pocket and driving hole, described first valve pocket and described driving hole are all between described unit head and described second valve pocket, described first valve pocket and described driving hole are arranged on described valve inner with being isolated from each other, and described driving hole is positioned at the outside of described first valve pocket, described entrance point is communicated with described first valve pocket, the described port of export is communicated with described second valve pocket, and the described port of export is communicated with by check-valve port with described first valve pocket, described first valve pocket is communicated with by throttle orifice with described second valve pocket, main valve plug, described main valve plug to be arranged in described second valve pocket and to drive with described unit head and is connected, and the valve head of described main valve plug coordinates with described throttle orifice the aperture controlling described throttle orifice, drive link, described drive link to be arranged in described driving hole and to be slidably matched with described driving hole, realizes described main valve plug to drive with described unit head and be connected by described drive link, nonreturn valve core, described nonreturn valve core is arranged in described first valve pocket, and the valve head of described nonreturn valve core coordinates with described check-valve port the opening and closing controlling described check-valve port.
Further, described first valve pocket has uncovered thus described entrance point towards the side of described entrance point and is communicated with described first valve pocket, described check-valve port and to be describedly uncoveredly oppositely arranged, and described nonreturn valve core is arranged between described uncovered and described check-valve port.
Further, described nonreturn valve core and described entrance point are coaxially arranged.
Further, described heating power expansion valve also comprises nonreturn valve core fairlead, described nonreturn valve core fairlead is fixed in described first valve pocket, described nonreturn valve core fairlead comprises the sleeve with pilot hole, the valve rod of described nonreturn valve core to be arranged in described pilot hole and to be slidably matched with described pilot hole, is provided with fluid passage between the inside of described nonreturn valve core fairlead and/or the wall of described nonreturn valve core fairlead and described first valve pocket.
Further, described nonreturn valve core fairlead also comprise be arranged on described sleeve periphery, along described nonreturn valve core fairlead axis extend and the multiple raised lines be intervally installed, described fluid passage comprises the axial pass trough forming shape between described multiple raised line.
Further, the first end of described drive link abuts with described unit head, and the second end of described drive link abuts with described main valve plug.
Further, described heating power expansion valve also comprises flexible member, and described flexible member is arranged in described second valve pocket, and described flexible member applies the valve head of main valve plug is had towards the power of the movement tendency of described throttle orifice to described main valve plug.
Further, described drive link is many, and described many drive links are evenly arranged around the central axis of described main valve plug.
Further, the gap between described drive link and described driving hole meets following condition: under the pressure of 0.2MPa, is added up to be no more than 300ml/min by the gas flow in the gap between described drive link and described driving hole.
Second aspect present invention provides a kind of heat pump, and described heat pump comprises heating power expansion valve, wherein, and the heating power expansion valve of described heating power expansion valve according to any one of first aspect present invention.
According to heating power expansion valve of the present invention and the heat pump with this heating power expansion valve, heating power expansion valve comprises valve body, main valve plug, drive link and nonreturn valve core, valve body comprises unit head, entrance point, the port of export, first valve pocket, second valve pocket and driving hole, first valve pocket and driving hole are all between unit head and the second valve pocket, first valve pocket and driving hole are arranged on valve inner with being isolated from each other, and driving hole is positioned at the outside of the first valve pocket, entrance point is communicated with the first valve pocket, the port of export is communicated with the second valve pocket, the port of export is communicated with by check-valve port with the first valve pocket, first valve pocket is communicated with by throttle orifice with the second valve pocket, main valve plug to be arranged in the second valve pocket and to drive with unit head and is connected, and the valve head of main valve plug coordinates the aperture to control throttle orifice with throttle orifice, drive link to be arranged in driving hole and to be slidably matched with driving hole, realizes main valve plug to drive with unit head and be connected by drive link, nonreturn valve core is arranged in the first valve pocket, and the valve head of nonreturn valve core coordinates the opening and closing to control check-valve port with check-valve port.
Main valve plug is driven owing to being provided with drive link, drive link and the first valve pocket are isolated and are arranged and be positioned at outside the first valve pocket, thus provide sufficient installation space to the first valve pocket, by-pass structure can be arranged in the first valve pocket, that is, by-pass structure can be arranged on valve inner and by-pass structure need not be set at the valve pocket side at main valve plug place, thus by-pass structure is set when not increasing the volume of valve body, make the structure of heating power expansion valve more reasonable.
Further, because nonreturn valve core is arranged in the first valve pocket, and the first valve pocket is by being directly communicated with entrance point towards the uncovered of entrance point, therefore, by-pass need not be offered specially on valve body for installing nonreturn valve core, but directly make use of the passage of entrance point, thus this heating power expansion valve can reduce the volume of heating power expansion valve.
In addition, owing to not offering by-pass, also without the need to arranging bypass pilot seal plug and the outer end of sealing ring to by-pass seals, thus the production cost of heating power expansion valve can be reduced.
Further, on the valve body that also avoid existing heating power expansion valve there is the possibility of leaking in the cold-producing medium at pilot seal plug place, decreases testing cost.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Schematic flow sheet when Fig. 1 is the heat pump refrigeration of the heating power expansion valve adopting built-in check valve in prior art;
Fig. 2 is the schematic flow sheet of the heat pump shown in Fig. 1 when heating;
Fig. 3 is the sectional structure schematic diagram under the heating power expansion valve of the built-in check valve of prior art is in refrigerating state;
Fig. 4 is the sectional structure schematic diagram under the heating power expansion valve of the built-in check valve shown in Fig. 3 is in the state of heating;
Fig. 5 is the perspective view of heating power expansion valve according to the preferred embodiment of the invention;
Fig. 6 is the sectional structure schematic diagram of the heating power expansion valve shown in Fig. 5 when being in forward refrigerating state;
Fig. 7 is the sectional structure schematic diagram of the heating power expansion valve shown in Fig. 5 when being in reverse pass-through state;
Fig. 8 is that the A-A of the heating power expansion valve shown in Fig. 5 is to sectional structure schematic diagram;
Fig. 9 is the perspective view of the nonreturn valve core of the heating power expansion valve shown in Fig. 5;
Figure 10 is the main TV structure schematic diagram of the nonreturn valve core shown in Fig. 9;
Figure 11 is the side-looking structural representation of Figure 10;
Figure 12 is the perspective view of the nonreturn valve core fairlead of the heating power expansion valve shown in Fig. 5;
Figure 13 is the main TV structure schematic diagram of the nonreturn valve core fairlead shown in Figure 12;
Figure 14 is the side-looking structural representation of Figure 13.
Detailed description of the invention
Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
It should be noted that used term is only to describe detailed description of the invention here, and be not intended to restricted root according to illustrative embodiments of the present invention.As used herein, unless the context clearly indicates otherwise, otherwise singulative is also intended to comprise plural form, in addition, it is to be further understood that, when use belongs to " comprising " and/or " comprising " in this manual, it indicates existing characteristics, step, operation, device, assembly and/or their combination.
For convenience of description, here can usage space relative terms, as " ... on ", " in ... top ", " at ... upper surface ", " above " etc., be used for the spatial relation described as a device shown in the figure or feature and other devices or feature.Should be understood that, space relative terms is intended to comprise the different azimuth in use or operation except the described in the drawings orientation of device.Such as, " in other devices or structure below " or " under other devices or structure " will be positioned as after if the device in accompanying drawing is squeezed, being then described as the device of " above other devices or structure " or " on other devices or structure ".Thus, exemplary term " in ... top " can comprise " in ... top " and " in ... below " two kinds of orientation.This device also can other different modes location (90-degree rotation or be in other orientation), and relatively describe space used here and make respective explanations.
As described by background technology, a series of technical problem is there is in the heating power expansion valve of prior art because of the by-pass offered for installing nonreturn valve core, for this reason, the preferred embodiment of the present invention proposes a kind of heating power expansion valve and has the heat pump of this heating power expansion valve.
As shown in Fig. 5 to Figure 14, this heating power expansion valve 100 comprises valve body 7, main valve plug 6, drive link 8 and nonreturn valve core 3.Valve body 7 comprises unit head 1, entrance point, the port of export, the first valve pocket C, the second valve pocket D and driving hole, first valve pocket C and driving hole are all between unit head 1 and the second valve pocket D, it is inner that first valve pocket C and driving hole are arranged on valve body 7 with being isolated from each other, and driving hole is positioned at the outside of the first valve pocket C, entrance point is communicated with the first valve pocket C, the port of export is communicated with the second valve pocket D, and the port of export is communicated with by check-valve port B with the first valve pocket C, the first valve pocket C is communicated with by throttle orifice A with the second valve pocket D.Main valve plug 6 to be arranged in the second valve pocket D and to drive with unit head 1 and is connected, and the valve head of main valve plug 6 coordinates the aperture to control throttle orifice A with throttle orifice A.Drive link 8 to be arranged in driving hole and to be slidably matched with driving hole, realizes main valve plug 6 to drive with unit head 1 and be connected by drive link 8.Nonreturn valve core 3 is arranged in the first valve pocket C, and the valve head of nonreturn valve core 3 coordinates the opening and closing to control check-valve port B with check-valve port B.
Main valve plug 6 is driven owing to being provided with drive link 8, drive link 8 and the first valve pocket C isolate and arrange and be positioned at outside the first valve pocket C, thus provide sufficient installation space to the first valve pocket C, by-pass structure can be arranged in the first valve pocket, that is, by-pass structure can be arranged on valve inner and by-pass structure need not be set at the valve pocket side at main valve plug place, thus by-pass structure is set when not increasing the volume of valve body, make the structure of heating power expansion valve more reasonable.
The heating power expansion valve of this preferred embodiment is further illustrated below in conjunction with Fig. 5 to Figure 14.
In the present embodiment preferably, the first valve pocket C has uncovered thus entrance point and is communicated with the first valve pocket C towards the side of entrance point, check-valve port B and to be uncoveredly oppositely arranged, and nonreturn valve core 3 is arranged between uncovered and check-valve port B.
Because nonreturn valve core 3 is arranged in the first valve pocket C, and the first valve pocket C is by being directly communicated with entrance point towards the uncovered of entrance point, therefore, by-pass need not be offered specially on valve body 7 for installing nonreturn valve core 3, but directly make use of the passage of entrance point, thus this heating power expansion valve 100 can reduce the volume of heating power expansion valve.In addition, owing to not offering by-pass, also without the need to arranging bypass pilot seal plug and the outer end of sealing ring to by-pass seals, thus the production cost of heating power expansion valve can be reduced.Further, on the valve body that also avoid existing heating power expansion valve there is the possibility of leaking in the cold-producing medium at pilot seal plug place, decreases testing cost.
More preferably, nonreturn valve core 3 and entrance point are coaxially arranged.This is provided with the design and processing that are beneficial to valve body 7.
But, for the purpose of the present invention, as long as nonreturn valve core 3 can by the uncovered entrance point that directly utilizes towards openend of the first valve pocket C as by-pass, be not limited to nonreturn valve core 3 coaxial with entrance point, but the axis of nonreturn valve core 3 can be made to arrange in the same way relative to the axis of entrance point but have interval, even can in an angularly arrange between these two axis.
As shown in Fig. 6, Fig. 7, Figure 12 to Figure 14, in order to limit the direction of motion of nonreturn valve core 3, in the present embodiment preferably, heating power expansion valve 100 also comprises nonreturn valve core fairlead 4, nonreturn valve core fairlead 4 is fixed in the first valve pocket C, nonreturn valve core fairlead 4 comprises the sleeve 41 with pilot hole, the valve rod of nonreturn valve core 3 to be arranged in pilot hole and to be slidably matched with pilot hole, the inside of nonreturn valve core fairlead 4 and/or be provided with fluid passage between nonreturn valve core fairlead 4 and the wall of the first valve pocket C.Nonreturn valve core fairlead 4 can send into the first valve pocket C by the entrance point of valve body 7, and will be fixed in valve body 7 by the mode such as being press-fitted or be threaded.
Arrange because drive link in the present invention 8 and the first valve pocket C isolate, therefore, the design space of the first valve pocket (4) is larger, thus can nonreturn valve core fairlead 4 and pilot hole thereof be arranged longer, this is conducive to the position of the central axis keeping nonreturn valve core 3 when nonreturn valve core 3 coordinates with check-valve port B, thus ensures tight cooperation therebetween.Such as, the by-pass structure comprising nonreturn valve core 3 and nonreturn valve core fairlead 4 and check-valve port B can be made to pass the central axis of valve body 7, in the present embodiment, namely nonreturn valve core fairlead 4 and check-valve port B have been separately positioned on the both sides of the central axis of valve body 7.
In the present embodiment, the nonreturn valve core fairlead 4 of heating power expansion valve 100 also comprise the periphery that is arranged on sleeve 41 and, axially extend and the multiple raised lines 42 be intervally installed along nonreturn valve core fairlead 4, fluid passage comprises the axial pass trough formed between multiple raised line 42.As shown in Figure 12 to Figure 14, nonreturn valve core fairlead 4 appearance integral becomes flap, ensure enough spaces between flap and allow cold-producing medium can be bordering on passing through of zero pressure drop.
In a unshowned embodiment, fluid passage can also be arranged on the inside of nonreturn valve core fairlead, and such as, fluid passage can be the multiple axial passages in the barrel of the sleeve 41 being arranged on nonreturn valve core fairlead 4.In another unshowned embodiment, fluid passage can also be many grooves axially arranged along nonreturn valve core fairlead 4 be arranged on the chamber wall of the first valve pocket C.
Preferably, the maximum cross-section area of the valve head of nonreturn valve core 3 is greater than the cross-sectional area of the valve rod of nonreturn valve core 3.The maximum cross-section area of the valve head of nonreturn valve core 3 is larger than valve rod cross-sectional area, can ensure reliable draw ratio on the one hand, can ensure that heating power expansion valve 100 is under forward refrigerating state on the other hand, can easily closing one-way valve mouth B.In addition, the valve head of nonreturn valve core 3 is arranged to bulb shape or coniform, to ensure that the valve head of nonreturn valve core 3 can have good sealing with the check-valve port B in valve body 7.
In the present embodiment, the radial section of pilot hole is polygon, and the radial section of the valve rod of nonreturn valve core 3 is identical with the radial cross-sectional shape of pilot hole.This arranges and can prevent nonreturn valve core 3 from rotating relative to nonreturn valve core fairlead 4.In addition, nonreturn valve core 3 can adopt the material that density is lighter, in this case, valve rod is arranged to many prismatic and is beneficial to and reduces system works when heating state because nonreturn valve core 3 and nonreturn valve core fairlead 4 two kinds of unlike materials have different coefficient of thermal expansions and stuck probability.
In addition, in the present embodiment, throttle orifice A is vertical with check-valve port B.This setting is beneficial to the processing and manufacturing of valve body 7.
Drive link 8 and driving hole are slidably matched, and the first end of drive link 8 abuts with unit head 1, and the second end of drive link 8 abuts with main valve plug 6.
Described heating power expansion valve 100 also comprises flexible member 12, and flexible member 12 is arranged in the second valve pocket D, and flexible member 12 pairs of main valve plugs 6 apply the valve head of main valve plug 6 is had towards the power of the movement tendency of throttle orifice A.
Preferably, heating power expansion valve 100 also comprises many drive links 8, and many drive links 8 are evenly arranged around the central axis of main valve plug 6.
The external diameter of drive link 8 need have good coordinating with the hole wall of the driving hole of valve body 7, such as, for outer balanced valve, preferably, gap between drive link 8 and driving hole meets following condition: under the pressure of 0.2MPa, is added up to be no more than 300ml/min by the gas flow in the gap between each drive link 8 and valve body 7.
In the present embodiment, be specifically provided with two drive links 8.Unit head 1 is positioned at the napex of valve body 7, and unit head 1 is gas tank component, and the top of gas tank component has outer balance pipe, and gas tank component comprises diaphragm and is arranged on the driving member 2 below diaphragm, and the upper end of every root drive link 8 abuts with the bottom of driving member 2.Main valve plug 6 comprises valve head and is arranged on the valve rod of valve head bottom, the valve head of main valve plug 6 is conical valve head, conical valve head coordinates with throttle orifice A, and when conical valve head moves upward, throttle orifice A aperture reduces, and when conical valve head moves downward, the aperture of throttle orifice A increases.Main valve plug 6 also comprises the bulge loop arranged on valve rod, bulge loop is used for being slidably matched with the chamber wall of valve body second valve pocket D on the one hand, to lead to the motion of main valve plug 6, on the other hand, the lower end of drive link 8 is connected to bulge loop upper surface, thus main valve plug 6 can be driven to move by two drive links 8.Flexible member 12 particularly can for being arranged on the Compress Spring of the below of main valve plug 6, and the upper end of spring is against on the lower surface of bulge loop, and the active force of spring makes the main valve plug 6 of heating power expansion valve move up, and produces the pretightning force that is closed throttle orifice A.
As shown in Fig. 5 to Figure 14, in the present embodiment, arrange an inclined hole and be connected with check-valve port B by the port of export of valve body 7 in valve body 7, the entrance point of valve body 7 is connected with inlet tube a, and the port of export of valve body 7 is connected with outlet b.When system is in forward refrigerating state as shown in Figure 6, normal temperature high voltage cold-producing medium enters in valve body 7 by the inlet tube a be connected with the entrance point of valve body 7, through the fluid passage of nonreturn valve core fairlead 4 being arranged at flap, flow to throttle orifice A on the one hand, flow to check-valve port B on the one hand, nonreturn valve core 3 is under the effect of high-pressure refrigerant, automatically check-valve port B is closed, cold-producing medium all carries out throttling by throttle orifice A and passes through, and flows out to outlet b after throttling by the port of export of valve body 7.
When system be in heat state time, normal temperature high voltage cold-producing medium enters in valve body 7 by the outlet b be connected with the port of export of valve body 7, enter valve body second valve pocket D on the one hand, promote nonreturn valve core 3 on the one hand and open check-valve port B to left movement, the entrance point that cold-producing medium flows through valve body 7 by the fluid passage that the annular space between nonreturn valve core 3 and check-valve port B and the nonreturn valve core fairlead 4 of flap and the inwall of the first valve pocket 7 are formed flows out outside valve body 7 finally by inlet tube a, wherein, enter the cold-producing medium in the second valve pocket D of valve body 7 little relative to the flow flowed through from check-valve port B by the flow of throttle orifice A, can ignore.
The heating power expansion valve 100 that the present invention proposes is applicable to forward and reverse occasion that can use such as air-conditioning, heat pump.The heat pump of the present embodiment comprises aforesaid heating power expansion valve 100.
The installation of this heating power expansion valve 100 is the same with common external-balancing thermal expansion valve 100 to be connected in heat pump or air-conditioning system.The inlet tube a of heating power expansion valve is connected to high-pressure side and the condensator outlet of system, outlet b is connected to low-pressure end and the evaporator inlet of system, outer balance pipe connects evaporator outlet end, the temperature-sensitive package bundle hoop of heating power expansion valve is on evaporator outlet end outer tube wall horizontal level, two heating power expansion valves 100 just needing model specification the same, in a specific embodiment, please refer to Fig. 1 and Fig. 2, only need the heating power expansion valve 50 replacing prior art with the heating power expansion valve 100 of above embodiment.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
By-pass structure can be arranged on valve inner and need not arrange by-pass structure at the valve pocket side at main valve plug place by this heating power expansion valve, thus arranges by-pass structure when not increasing the volume of valve body, makes the structure of heating power expansion valve more reasonable.The opening end of the first valve pocket of the installation nonreturn valve core of heating power expansion valve towards valve body entrance point and therefore make entrance point be communicated with the first valve pocket, thus, without the need to arranging the by-pass of nonreturn valve core specially, therefore, the project organization of hinge structure scheme, parts are few, valve volume is little, structure is simple, and easily, production cost reduces in assembling.Also reduce the assembly technology hole that valve body communicates with the external world, decrease the leakage point of valve, improve the air-tightness of valve, reduce quality cost.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a heating power expansion valve, is characterized in that, comprising:
Valve body (7), described valve body (7) comprises unit head (1), entrance point, the port of export, first valve pocket (C), second valve pocket (D) and driving hole, described first valve pocket (C) and described driving hole are all positioned between described unit head (1) and described second valve pocket (D), it is inner that described first valve pocket (C) and described driving hole are arranged on described valve body (7) with being isolated from each other, and described driving hole is positioned at the outside of described first valve pocket (C), described entrance point is communicated with described first valve pocket (C), the described port of export is communicated with described second valve pocket (D), and the described port of export is communicated with by check-valve port (B) with described first valve pocket (C), described first valve pocket (C) is communicated with by throttle orifice (A) with described second valve pocket (D),
Main valve plug (6), described main valve plug (6) to be arranged in described second valve pocket (D) and to drive with described unit head (1) and is connected, and the valve head of described main valve plug (6) coordinates with described throttle orifice (A) aperture controlling described throttle orifice (A);
Drive link (8), described drive link (8) to be arranged in described driving hole and to be slidably matched with described driving hole, realizes described main valve plug (6) to drive with described unit head (1) and be connected by described drive link (8);
Nonreturn valve core (3), described nonreturn valve core (3) is arranged in described first valve pocket (C), and the valve head of described nonreturn valve core (3) coordinates with described check-valve port (B) opening and closing controlling described check-valve port (B).
2. heating power expansion valve according to claim 1, it is characterized in that, described first valve pocket (C) has uncovered thus described entrance point towards the side of described entrance point and is communicated with described first valve pocket (C), described check-valve port (B) to be uncoveredly oppositely arranged with described, and described nonreturn valve core (3) is arranged between described uncovered and described check-valve port (B).
3. heating power expansion valve according to claim 2, is characterized in that, described nonreturn valve core (3) and described entrance point are coaxially arranged.
4. heating power expansion valve according to claim 2, it is characterized in that, described heating power expansion valve also comprises nonreturn valve core fairlead (4), described nonreturn valve core fairlead (4) is fixed in described first valve pocket (C), described nonreturn valve core fairlead (4) comprises the sleeve (41) with pilot hole, the valve rod of described nonreturn valve core (3) to be arranged in described pilot hole and to be slidably matched with described pilot hole, fluid passage is provided with between the inside of described nonreturn valve core fairlead (4) and/or the wall of described nonreturn valve core fairlead (4) and described first valve pocket (C).
5. heating power expansion valve according to claim 4, it is characterized in that, described nonreturn valve core fairlead (4) also comprise be arranged on described sleeve (41) periphery, along described nonreturn valve core fairlead (4) axis extend and the multiple raised lines (42) be intervally installed, described fluid passage comprises the axial pass trough forming shape between described multiple raised line (42).
6. heating power expansion valve according to any one of claim 1 to 5, it is characterized in that, the first end of described drive link (8) abuts with described unit head (1), and the second end of described drive link (8) abuts with described main valve plug (6).
7. heating power expansion valve according to claim 6, it is characterized in that, described heating power expansion valve also comprises flexible member (12), described flexible member (12) is arranged in described second valve pocket (D), and described flexible member (12) applies the valve head of main valve plug (6) is had towards the power of the movement tendency of described throttle orifice (A) to described main valve plug (6).
8. heating power expansion valve according to claim 6, is characterized in that, described drive link (8) is many, and described many drive links (8) are evenly arranged around the central axis of described main valve plug (6).
9. heating power expansion valve according to any one of claim 1 to 5, it is characterized in that, gap between described drive link (8) and described driving hole meets following condition: under the pressure of 0.2MPa, is added up to be no more than 300ml/min by the gas flow in the gap between described drive link (8) and described driving hole.
10. a heat pump, described heat pump comprises heating power expansion valve, it is characterized in that, described heating power expansion valve is heating power expansion valve according to any one of claim 1 to 9.
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| CN201410377942.1A CN105466088B (en) | 2014-08-01 | 2014-08-01 | Heating power expansion valve and heat pump system with the heating power expansion valve |
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| CN201410377942.1A CN105466088B (en) | 2014-08-01 | 2014-08-01 | Heating power expansion valve and heat pump system with the heating power expansion valve |
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| CN105466088B CN105466088B (en) | 2019-01-29 |
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| CN111720584A (en) * | 2019-03-20 | 2020-09-29 | 浙江三花汽车零部件有限公司 | Control valve and air conditioning system |
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|---|---|
| CN105466088B (en) | 2019-01-29 |
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Effective date of registration: 20220818 Address after: 312500 Daming new area, economic development zone, Xinchang County, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Sanhua Commercial Refrigeration Co.,Ltd. Address before: 312500 xialiquan village, Qixing street, Xinchang County, Shaoxing City, Zhejiang Province Patentee before: ZHEJIANG SANHUA CLIMATE AND APPLIANCE CONTROLS GROUP Co.,Ltd. |