CN102410678A - Heat pump type expansion valve without temperature-sensing bag - Google Patents
Heat pump type expansion valve without temperature-sensing bag Download PDFInfo
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- CN102410678A CN102410678A CN201110303354XA CN201110303354A CN102410678A CN 102410678 A CN102410678 A CN 102410678A CN 201110303354X A CN201110303354X A CN 201110303354XA CN 201110303354 A CN201110303354 A CN 201110303354A CN 102410678 A CN102410678 A CN 102410678A
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Abstract
The invention discloses a heat pump type expansion valve without a temperature-sensing bag, which is composed of a gas tank head assembly, a valve body, a valve needle assembly, a transmission rod, a spring assembly, an adjusting assembly, a valve cap, an inlet connection pipe and an outlet connection pipe, wherein the gas tank head assembly and the valve cap are respectively arranged at the upper and lower end parts of the valve body; the adjusting assembly is arranged between the valve cap and the valve body and the upper part of the adjusting assembly is connected to the lower part of the spring assembly; the upper part of the spring assembly is connected to the lower end of the transmission rod and the upper end of the transmission rod is connected to the valve needle assembly; the inlet connection pipe and the outlet connection pipe are installed on the valve body and are located blow the valve needle assembly; the gas tank head assembly is composed of a capillary tube, a gas tank cover, a diaphragm, a gas tank seat and a transmission block; the gas tank cover is matched with the gas box seat to form a cavity body, which is divided by the diaphragm to form an upper opening cavity and a lower closed cavity; two ends of the capillary tube are connected to a gas returning pipe of an air-conditioning system and the upper opening chamber respectively; the transmission block is arranged in the lower closed chamber; and the transmission block is connected with the valve needle assembly in a sealing mode. The expansion valve is provided with no temperature-sensing mechanism; however, the capillary tube is directly connected with the gas returning pipe of a compressor and the suction pressure is supplied by the compressor to directly control the expansion valve to work. Thus the expansion valve is applicable to the air-conditioning system of any refrigeration working medium and has the advantages of convenience for installation, flexibility in action and low cost.
Description
[technical field]
The present invention relates at refrigeration, pump type heat expansion valve in the air-conditioning system, especially a kind of not with a kind of pump type heat expansion valve of bulb, that do not carry out that working medium fills, as the not have temperature-sensitive mechanism ability automatic regulating system refrigerant flow of directly controlling by compressor air suction pressure.
[background technology]
The systematic schematic diagram of freon air-conditioning system is as shown in Figure 1, comprises compressor 11, four-way change-over valve 12, outdoor heat exchanger 13, pump type heat expansion valve (pump type heat heating power expansion valve) 14, indoor heat exchanger 15.Pump type heat heating power expansion valve 14 is one of indispensable five big parts in the freon air-conditioning system, mainly is used for regulating refrigerant flow.It is the control valve of control flow, is again simultaneously the bidirectional throttling valve that freezes, heats.It is installed between two heat exchangers, and the air intake duct of its outer balance pipe and compressor joins, and remains with compressor delivery pressure consistent; Its thermometer bulb is to wrap up on the return tube of four-way change-over valve, experiences the suction temperature of evaporimeter, with the switching of automatic control expansion valve, guarantees the flow that system is certain.
The effect of pump type heat heating power expansion valve mainly contains following 4 points:
1. the effect of bidirectional balanced stream.Guard system is not in refrigeration (forward) and heats arbitrary state of (oppositely), and the two-way of expansion valve all can stably play throttling and autoregulation, reaches following 3 effects.
2. throttling step-down when making the refrigerant liquid of normal temperature high voltage flow through expansion valve, the cold-producing medium moist steam that becomes low-temp low-pressure gets into evaporimeter, evaporation heat absorption in evaporimeter, thus reach the purpose of refrigeration cool-down.
3. the pairing suction temperature of back pressure that is communicated with the compressor return air pipe according to outer balance pipe; And the temperature difference (being the variation of the refrigerant vapour degree of superheat) of the evaporator outlet temperature experienced of bulb; Change the open degree of expansion valve; Automatically regulate the refrigerant flow of inflow evaporator, refrigerant flow is complementary with the thermic load of evaporimeter all the time.
4. through the control of expansion valve, make the refrigerant vapour of evaporator outlet keep certain degree of superheat, can guarantee the making full use of of heat transfer area of evaporimeter, can prevent that again compressor from liquid hammer occurring towards the cylinder phenomenon.
The structure of pump type heat heating power expansion valve is as shown in Figure 2; Mainly form by parts such as air tank head parts, valve body, needle sub-assembly, drive link, regulating spring, adjusting rod, outer balance pipes, specifically comprise O shape circle 21, regulate seat 22, spring base 23, regulating spring 24, bulb 25, advance that (going out) mouthful takes over 26, drive link 27, filler line 28, drive block 29, diaphragm lid 210, capillary 211, diaphragm 212, diaphragm seat 213, outer balance pipe 214, go out that (advancing) mouthful takes over 215, needle sub-assembly 216, valve body 217, adjusting rod 218, bonnet 219.
The air tank head parts mainly play temperature-sensitive, transfer function; It is made up of parts such as temperature-sensitive pipe (thermometer bulb), capillary, gas tank lid, diaphragm, gas tank seat, driver blades; Two chambeies, epicoeles were a closed container about wherein diaphragm was divided into whole air tank head parts; Filling an amount of refrigeration working medium through filler line in the thermometer bulb (is many to fill with worker quality liquid generally; Other has that liquid cross charge, gas charge, mixing fill, absorptive charge etc., mainly requires decide according to systematic function), the variation that its pressure inside P satisfies with thermometer bulb temperature T 0 changes; Cavity of resorption connects outer balance pipe and communicates with the compressor return air pipe of system, and pressure and back pressure P1 are consistent.
According to the operation principle of pump type heat heating power expansion valve 14, the diaphragm of air tank head is carried out force analysis, like Fig. 3-1,3-2.Among Fig. 3-1, the 3-2: the P0-evaporating pressure.Its size is determined by evaporating temperature.The pressure that P bullet-spring force is converted to.Its size is determined by spring controlled degree of tightness.P satisfy-charges into the saturation pressure of working medium in the bulb.Its size is by the height decision of the character of working medium in the bulb and the evaporator outlet place refrigerant temperature experienced.This place omits following two power that influence is minimum: the power that the inlet and outlet pressure difference of PK-expansion valve acts on the spool is converted to the pressure to diaphragm.The pressure that P membrane-membrane sheet elastic force is converted to.
From Fig. 3-1,3-2, can find out: acting on the diaphragm below has 2 pressure: P0, P bullet, and these two power are closed valve; And having 1 pressure: P full above acting on diaphragm, this power is opened valve; When P full=during the P0+P bullet, valve is in the poised state of a certain aperture.
When the thermic load of evaporimeter increases, cause that the degree of superheat of evaporator outlet place cold-producing medium increases, the temperature experienced of bulb raises so, corresponding saturation pressure P is full also increases for it, form P full＞the P0+P bullet.So just cause diaphragm to promote drive link and move down, the aperture of valve is increased, refrigerant flow increases, and refrigerating capacity increases, thereby is complementary with the thermic load of evaporimeter.At this moment valve is in a new poised state again.
On the contrary, when the thermic load of evaporimeter reduces, cause that the degree of superheat of evaporator outlet place cold-producing medium reduces, the temperature experienced of bulb reduces so, and corresponding saturation pressure P is full also reduces for it, form P full＜the P0+P bullet.So just cause spring to promote to move on the drive link, the aperture of valve is reduced, refrigerant flow reduces, and refrigerating capacity reduces, thereby is complementary with the thermic load of evaporimeter.At this moment valve is in another new poised state again.
So the pump type heat heating power expansion valve is an aperture of adjusting valve according to the variation of the refrigerant superheat degree of evaporator outlet, the cold that reaches automatic adjusting refrigerating plant is to satisfy the demand that extraneous thermic load constantly changes.
Mainly there is following deficiency in the pump type heat heating power expansion valve of this structure:
1. the working medium that fills in the bulb temperature---pressure characteristic directly affects the performance of expansion valve; It plays a part key performance to expansion valve; Therefore filling technology also is the present trade secret of various countries, each enterprise in the world; The quality of expansion valve performance is mainly reflected in the height of the technology of filling, but this technology is grasped difficulty;
2. concerning certain type of expansion valve; Because the working medium that fills in the bulb is invariable; Therefore the characteristic of such expansion valve can only be useful in its refrigerated air-conditioning system of the same type in, expansion valve just has the classification of different system like this, uses or the like with, R407C with, R134a like R22; Of a great variety, versatility is poor;
3. must have the air intake duct of an outer balance pipe and compressor to join, expansion valve can reverse operate as normal when heating with the switching exactly of guaranteeing expansion valve and system, therefore, can bring inconvenience to installation, has also increased the manufacturing cost of product.
[summary of the invention]
The object of the invention solves the problems of the prior art exactly; A kind of pump type heat expansion valve that does not have bulb is proposed; Do not carry out filling of working medium, not only can save the filled technical process of the air tank head that is difficult to grasp, be applicable to the refrigerated air-conditioning system of any working medium; And make installation process not influenced by ambient temperature, easy for installation.
For realizing above-mentioned purpose, the present invention proposes a kind of pump type heat expansion valve that does not have bulb, it is made up of air tank head assembly, valve body, needle assembly, drive link, spring assembly, adjusting part, bonnet, entrance sleeve and discharge connection; The upper end of said valve body is provided with the air tank head assembly, and the bottom of valve body is provided with bonnet, is provided with adjusting part between bonnet and the valve body; Adjusting part top is connected to the bottom of spring assembly; The top of spring assembly is connected to the lower end of drive link, and the upper end of drive link is connected to the needle assembly, and entrance sleeve and discharge connection are installed on the valve body and are positioned at the below of needle assembly; Said air tank head assembly is made up of capillary, gas tank lid, diaphragm, gas tank seat and drive block; But do not have the temperature-sensitive pipe, gas tank covers gentle block and cooperates the formation cavity, and diaphragm is separated into open cavity and following enclosed cavity with cavity; An end capillaceous directly inserts the muffler of air-conditioning system; The other end is connected to open cavity, is provided with drive block in the following enclosed cavity, and said drive block and needle assembly are tightly connected.This expansion valve does not have the temperature-sensitive pipe; Do not carry out filling of working medium yet; No temperature-sensitive mechanism, but by capillary directly and the air-conditioning system muffler join, directly control expansion valve work by back pressure; Be exactly to replace traditional temperature control on principle, and on valve body structure, improve to some extent with pressure control.
As preferably, said needle assembly is the sealing of valve body upper end, and is provided with the 2nd O shape circle between the needle assembly, drive block, valve body three, further improved sealing effectiveness.
As preferably, said spring assembly comprises spring base, spring and spring housing, and an end of said spring mounts elastically, and the other end is installed on the spring housing, and the lower end of drive link connects spring housing, and is simple in structure, easy for installation, and telescopic spring is stable.
As preferably, said adjusting part comprises to be regulated seat and is installed in the adjusting rod of regulating on the seat, and said adjusting rod connects the bottom of spring base, regulates seat and is threaded in valve body lower end portion, and bonnet is threaded in the bottom of regulating seat, and is simple in structure, easy to adjust.
As preferably, be provided with O shape circle between said adjusting rod and the adjusting seat, further improved sealing effectiveness.
As preferably, the upper end of said adjusting rod is conical, and the bottom of spring base is provided with the conical socket that matches with taper shape, and is easy for installation.
Beneficial effect of the present invention: the present invention has cancelled the temperature-sensitive pipe, has removed the air tank head that is difficult to grasp from and has filled technical process, and is not only easy for installation; Do not receive the influence of environment temperature; And significantly reduced description, can realize environmental protection production, and be applicable to the refrigerated air-conditioning system of any working medium; Directly the back pressure of cited system is controlled; Be active in one's movements, therefore no conventional expanded valve can not cause and the fluctuation of the refrigerating capacity that produces because of produce the action phenomenon that lags through " back pressure → suction temperature → temperature-sensitive pipe temperature → temperature-sensitive pipe pressure → air tank head pressure " a series of transmission.Simultaneously, saved outer balance pipe and temperature-sensitive pipe, install more convenient, and, further reduced cost.The present invention is specially adapted to back pressure and changes frequent refrigerated air-conditioning system, like automotive air-conditioning system, the convertible frequency air-conditioner decorum etc.
Characteristic of the present invention and advantage will combine accompanying drawing to be elaborated through embodiment.
[description of drawings]
Fig. 1 is the systematic schematic diagram of freon air-conditioning system;
Fig. 2 is the structural representation of pump type heat expansion valve in the prior art;
Fig. 3-the 1st, the stressed sketch map of the diaphragm of the air tank head of pump type heat expansion valve in the prior art;
Fig. 3-the 2nd, the force analysis sketch map of the diaphragm of the air tank head of pump type heat expansion valve in the prior art;
Fig. 4 is the structural representation of pump type heat expansion valve of the present invention;
Fig. 5-the 1st, the stressed sketch map of the air tank head of pump type heat expansion valve of the present invention;
Fig. 5-the 2nd, the force analysis sketch map of the air tank head of pump type heat expansion valve of the present invention.
[specific embodiment]
As shown in Figure 4, the pump type heat expansion valve of no bulb, by air tank head assembly, valve body 416, needle assembly 46, drive link 414, spring assembly, adjusting part, bonnet 418, advance (going out) mouthful take over 45 with go out (advancing) and mouthful take over 413 and form; The upper end of said valve body 416 is provided with the air tank head assembly; The bottom of valve body 416 is provided with bonnet 418, is provided with adjusting part between bonnet 418 and the valve body 416, and adjusting part top is connected to the bottom of spring assembly; The top of spring assembly is connected to the lower end of drive link 414; The upper end of drive link 414 is connected to needle assembly 46, advances (going out) mouthful adapter 45 and goes out the below that (advancing) mouthful adapter 413 is installed on the valve body 416 and is positioned at needle assembly 46, and said air tank head assembly is made up of capillary 410, gas tank lid 49, diaphragm 411, gas tank seat 412 and drive block 48; Gas tank covers 49 gentle blocks 412 and cooperates the formation cavity; Diaphragm 411 is separated into open cavity and following enclosed cavity with cavity, and an end of capillary 410 is connected to the muffler of air-conditioning system, and the other end is connected to open cavity; Be provided with drive block 48 in the following enclosed cavity, said drive block 48 is tightly connected with needle assembly 46.Said needle assembly 46 is valve body 416 upper ends sealings, and is provided with the 2nd O shape circle 47 between the needle assembly 46, drive block 48, valve body 416 threes.Said spring assembly comprises spring base 43, spring 4 and spring housing 15, and an end of said spring 4 is installed on the spring base 43, and the other end is installed on the spring housing 15, and the lower end of drive link 414 connects spring housing 15.Said adjusting part comprises to be regulated seat 2 and is installed in the adjusting rod of regulating on the seat 2 17, and said adjusting rod 17 connects the bottom of spring base 43, regulates seat 2 and is threaded in valve body 416 bottoms, and bonnet 418 is threaded in the bottom of regulating seat 2.Be provided with O shape circle 1 between said adjusting rod 17 and the adjusting seat 2.The upper end of said adjusting rod 17 is conical, and the bottom of spring base 43 is provided with and the conical conical socket that matches.Save the temperature-sensitive pipe, do not carried out filling of air tank head; Valve port and needle assembly 46 are arranged between inlet tube (forward) and the air tank head; Adopt seal that both are isolated between the driver blade of diaphragm 411 bottoms and the needle assembly 46, make the inlet pressure P0 of evaporimeter can not import to diaphragm 411 cavity of resorptions; During design, the effective area of effective area and the needle assembly 46 of diaphragm 411 is had has certain ratio poor.
Patent of the present invention has changed the operation principle of conventional heat pump type heating power expansion valve; Cancelled the temperature-sensitive pipe; Directly receive on the muffler of compressor with transmitting capillary 410; The back pressure P1 that directly gathers compressor drives the switching of pump type heat expansion valve, and the internal structure of pump type heat expansion valve is made appropriate change, can positive and negative two-way operate as normal to guarantee expansion valve.This scheme does not have filling of bulb, no working medium, does not promptly have temperature-sensitive mechanism, directly inserts the compressor return air pipe with capillary and controls expansion valve work, on principle is exactly to replace traditional temperature control with pressure control, and on valve body structure, improves to some extent.
As can be seen from Figure 4, the diaphragm 411 of air tank head of the present invention is stressed changes force analysis such as Fig. 5-1,5-2 with area.
Its three active forces:
P1-diaphragm 411 top active forces, be directly quote evaporimeter through crushing and overheated after compressor return air pressure, be called the valve power of closing.
P0-needle sub-assembly lower reaction power is evaporator pressure, and no crushing is claimed valve opening force.
P bullet-regulating spring active force is claimed valve opening force.
The effective area of F membrane-membrane sheet 411.
The effective area of F pin-needle sub-assembly.
In the course of the work, when valve was in balance, three active forces were following equality:
P0 * F pin+P bullet=P1 * F film
Can know that from above-mentioned equality the spring force of having set up is constant, it can make valve opening; Condensing pressure Pk becomes evaporating pressure P0 after this throttling, the pressure of this moment is the evaporator end pressure, and the area that it acts on the needle sub-assembly is the F pin, and needle is upwardly opened, so be called valve opening force.After cold-producing medium is flowed through evaporimeter, produce certain crushing, reach to the certain overheated caused pressure differential deltap P of compressor return air generation, Δ P=P0-P1.From then on can know among the figure that quote on the diaphragm 411 that P1 acts on air tank head, the area F film of diaphragm 411 with valve closing, is called the power of closing greater than the F pin.And diaphragm 411 bottoms of air tank head and valve body 416 usefulness O type circles are isolated, and make evaporating pressure only act on the needle sub-assembly, can not act on diaphragm 411 bottoms; F film＞F pin; During with valve closing to certain balance, reduce gradually because temperature reduces the P1 value, the power that acts on the F film also reduces thereupon; Make valve be opened into a new equalization point again automatically, its real work equality is:
P0 * F pin+P bullet >=P1 * F film
P0-evaporator pressure
P1-compressor return air pressure
The effective active area of F pin-needle assembly 46
The effective active area of F membrane-membrane sheet 411 work
Total power that P bullet-regulating spring produces
This shows, the unlatching size of valve, P0 value, P1 value in its work equality are constant, and valve opening is also with constant.Otherwise P0 value, P1 value become big or diminish, and all directly cause valve to become and diminish greatly, and during work, regulating spring power is constant, because refrigerant temperature descends, the P0 value is diminished, and valve opening force reduces, and valve is turned down.When reaching chilling temperature decline, the purpose that flow reduces thereupon automatically.Otherwise temperature rises, and the P0 value is increased, and valve opening force increases, and valve flow increases.
Can know that from figure what make valve variation maximum is evaporator outlet pressure P 1 and maximum diaphragm 411 areas of work area.Because of diaphragm 411 areas are big, the power that acts on top causes valve to change once changing.When room temperature descended, the compression rotating speed of convertible frequency air-conditioner was slack-off, the compressor air suction ability drop, and this moment, the P1 value rose, and the power that acts on diaphragm 411 areas increases, and valve is turned down.The cryogen of flowing through satisfies the compressor air suction needs through new balance.Otherwise temperature rises, the frequency-changeable compressor faster rotational speed, and inspiratory force improves, and promptly the P1 value reduces, and the power that acts on diaphragm 411 areas reduces, and valve is opened greatly, comes to reach voluntarily a new equalization point.
Know that from above-mentioned the size of the flow of valve opening is as long as lean on the size of compressor return air pressure to decide; Be that back pressure P1 value is big, valve flow diminishes, and the P1 value is little; It is big that valve flow becomes, and decision P1 value size is by the size of compressor air suction power, the inspiratory force of compressor hour; The P1 value increases, and valve flow is reduced.Otherwise, when the P1 value reduces, valve flow is increased.So this throttle is to do automatic adjusting according to compressor suction size, satisfies the compressor air suction requirement.When compressor shutdown, the P1 value increases, and when P1 * F film＞P0 * F pin+P bullet, valve closing is in case the liquid hit phenomenon of compressor start.In compressor when start,, the P1 value is during to certain value, and valve is just slowly opened again.
When air-conditioning heats, flow on the contrary, valve opening force P bullet is constant, and the P0 value of the former F of acting on pin becomes the condensing pressure Pk of high pressure, and simultaneously, because after the valve opening force increase, the P1 value also increases, new equalization point work equality is:
Pk * F pin+P bullet >=P1 * F film
Because of Pk * F pin+P bullet＞P0 * F pin+P bullet >=P1 * F film, the reverse flow that makes valve is greater than the forward flow, because during design, F film and F pin are proportional, its reverse flow increase just in time is a flow required when heating.
This compressor air suction pressure that directly leans on comes self-regulating pump type heat expansion valve, mainly contains following characteristics:
1. be not with the temperature-sensitive pipe, remove filled working medium from, with the muffler of the direct connecting system of capillary, applicable to any working medium refrigerated air-conditioning system; And expansion valve itself has saved the filled technology of the air tank head that is difficult to grasp, and has also significantly reduced description; Simultaneously, because of not needing in air tank head, not have the working medium of filling, can realize environmental protection production.
2. directly the back pressure of cited system is controlled; Be active in one's movements; Therefore no conventional expanded valve can not cause and the fluctuation of the refrigerating capacity that produces because of produce the action phenomenon that lags through " back pressure → suction temperature → temperature-sensitive pipe temperature → temperature-sensitive pipe pressure → air tank head pressure " a series of transmission.
3. do not have and do not have the working medium of filling in temperature-sensitive pipe, the air tank head, therefore the influence that does not receive environment temperature is installed.
4. saved outer balance pipe and temperature-sensitive pipe, easy for installation.
5. be specially adapted to back pressure and change frequent refrigerated air-conditioning system, like automotive air-conditioning system, the convertible frequency air-conditioner decorum etc.
The foregoing description is to explanation of the present invention, is not to qualification of the present invention, any scheme after the simple transformation of the present invention is all belonged to protection scope of the present invention.
Claims (6)
1. do not have the pump type heat expansion valve of bulb, it is characterized in that: be made up of air tank head assembly, valve body, needle assembly, drive link, spring assembly, adjusting part, bonnet, entrance sleeve and discharge connection, the upper end of said valve body is provided with the air tank head assembly; The bottom of valve body is provided with bonnet, is provided with adjusting part between bonnet and the valve body, and adjusting part top is connected to the bottom of spring assembly; The top of spring assembly is connected to the lower end of drive link, and the upper end of drive link is connected to the needle assembly, and entrance sleeve and discharge connection are installed on the valve body and are positioned at the below of needle assembly; Said air tank head assembly is made up of capillary, gas tank lid, diaphragm, gas tank seat and drive block; But do not have the temperature-sensitive pipe, gas tank covers gentle block and cooperates the formation cavity, and diaphragm is separated into open cavity and following enclosed cavity with cavity; An end capillaceous directly inserts the muffler of air-conditioning system; The other end is connected to open cavity, is provided with drive block in the following enclosed cavity, and said drive block and needle assembly are tightly connected.
2. the pump type heat expansion valve of no bulb as claimed in claim 1 is characterized in that: said needle assembly is the sealing of valve body upper end, and is provided with the 2nd O shape circle between the needle assembly, drive block, valve body three.
3. the pump type heat expansion valve of no bulb as claimed in claim 1; It is characterized in that: said spring assembly comprises spring base, spring and spring housing; One end of said spring mounts elastically, and the other end is installed on the spring housing, and the lower end of drive link connects spring housing.
4. the pump type heat expansion valve of no bulb as claimed in claim 3; It is characterized in that: said adjusting part comprises to be regulated seat and is installed in the adjusting rod of regulating on the seat; Said adjusting rod connects the bottom of spring base; Regulate seat and be threaded in valve body lower end portion, bonnet is threaded in the bottom of regulating seat.
5. the pump type heat expansion valve of no bulb as claimed in claim 4 is characterized in that: be provided with O shape circle between said adjusting rod and the adjusting seat.
6. like the pump type heat expansion valve of claim 4 or 5 described no bulb, it is characterized in that: the upper end of said adjusting rod is for conical, and the bottom of spring base is provided with and the conical conical socket that matches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110303354XA CN102410678B (en) | 2011-09-30 | 2011-09-30 | Heat pump type expansion valve without temperature-sensing bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110303354XA CN102410678B (en) | 2011-09-30 | 2011-09-30 | Heat pump type expansion valve without temperature-sensing bag |
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| Publication Number | Publication Date |
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| CN102410678A true CN102410678A (en) | 2012-04-11 |
| CN102410678B CN102410678B (en) | 2013-06-05 |
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| CN201110303354XA Expired - Fee Related CN102410678B (en) | 2011-09-30 | 2011-09-30 | Heat pump type expansion valve without temperature-sensing bag |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105823276A (en) * | 2015-01-09 | 2016-08-03 | 艾默生环境优化技术(苏州)有限公司 | Two-way thermal expansion valve |
| CN106954376A (en) * | 2017-05-03 | 2017-07-14 | 南京航空航天大学 | The passive temperature difference starts formula spray cooler and method |
| CN108181228A (en) * | 2017-12-14 | 2018-06-19 | 北京金风科创风电设备有限公司 | Equivalent temperature cycle test system and method, and computer storage medium |
| WO2018188512A1 (en) * | 2017-04-13 | 2018-10-18 | 浙江三花汽车零部件有限公司 | Thermal expansion valve |
| CN111854238A (en) * | 2019-04-25 | 2020-10-30 | 株式会社鹭宫制作所 | Expansion valve and refrigeration cycle system |
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| CN105823276A (en) * | 2015-01-09 | 2016-08-03 | 艾默生环境优化技术(苏州)有限公司 | Two-way thermal expansion valve |
| CN105823276B (en) * | 2015-01-09 | 2021-07-30 | 艾默生环境优化技术(苏州)有限公司 | Two-way thermal expansion valve |
| WO2018188512A1 (en) * | 2017-04-13 | 2018-10-18 | 浙江三花汽车零部件有限公司 | Thermal expansion valve |
| US11326816B2 (en) | 2017-04-13 | 2022-05-10 | Zhejiang Sanhua Automotive Components Co., Ltd. | Thermal expansion valve |
| CN106954376A (en) * | 2017-05-03 | 2017-07-14 | 南京航空航天大学 | The passive temperature difference starts formula spray cooler and method |
| CN108181228A (en) * | 2017-12-14 | 2018-06-19 | 北京金风科创风电设备有限公司 | Equivalent temperature cycle test system and method, and computer storage medium |
| CN111854238A (en) * | 2019-04-25 | 2020-10-30 | 株式会社鹭宫制作所 | Expansion valve and refrigeration cycle system |
| CN111854238B (en) * | 2019-04-25 | 2022-06-07 | 株式会社鹭宫制作所 | Expansion valve and refrigeration cycle system |
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| CN102410678B (en) | 2013-06-05 |
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