CN101738027A - Two-way heating power expansion valve - Google Patents
Two-way heating power expansion valve Download PDFInfo
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- CN101738027A CN101738027A CN200810178199A CN200810178199A CN101738027A CN 101738027 A CN101738027 A CN 101738027A CN 200810178199 A CN200810178199 A CN 200810178199A CN 200810178199 A CN200810178199 A CN 200810178199A CN 101738027 A CN101738027 A CN 101738027A
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Abstract
The invention relates to a two-way heating power expansion valve which comprises a valve body, a left/right throttling conduit, a left/right air return conduit, a valve spool, a transmission rod and a containing hole of the transmission rod, wherein the valve body is provided with a first passage and a second passage, the left/right throttling conduit is connected with the first passage, the left/right air return conduit is connected with the second passage, the valve spool is arranged in the first passage, and the transmission rod penetrates through the first passage and the second passage. The two-way heating power expansion valve is characterized in that a temperature sensing component using sealed temperature sensitive wax as a temperature sensing body is arranged in the second passage and comprises an elastomer. A temperature sensing device can have a specific temperature-volume change curve by temperature sensitive wax materials with different mixture ratios and is matched with a refrigeration system to realize the function of a product, the temperature sensitive wax temperature sensing component is completely arranged in a return passage, is encircled by refrigerant gas flowing through the return passage and is not influenced by the external environment, the transmission of the temperature change is accurate, and the reliability of the product is enhanced.
Description
Technical field
The invention belongs to refrigeration control technology field, be particularly suitable for vapor compression heat pump systems (as air-conditioning system) etc.Be specifically related to a kind of two-way heating power expansion valve structure.
Background technology
Expansion valve as throttling arrangement is widely used in the loop of refrigeration system, temperature by the perception ad-hoc location, controlling the size of refrigerant flow, is that 200520013860.5 Chinese patent discloses a kind of two-way heating power expansion valve structure as shown in Figure 8 as the patent No..This structure comprises the valve body 1 ' that offers throttling passage 16 ' and return passage 17 ', in throttling passage, be provided with spool 6 ', be fixed with air tank head 200 at an end of valve body 1 ' as temperature sensing part, air tank head 200 is by gas tank seat 201, driver blade 202, diaphragm 203, gas tank lid 204 is welded to form, be filled with cold-producing medium 205 in the annular seal space between diaphragm 203 gentle case lids 204, the one side relative with above-mentioned annular seal space at diaphragm 203 communicates with return passage 17 ', when the refrigerant temperature in the return passage 17 ' changes, the pressure of the cold-producing medium in the annular seal space will change, this variation impels diaphragm 203 to promote the variation that driver blade 202 produces displacement, again this variation is delivered to valve port by drive link 7 ', the size of control valve aperture reaches the refrigerant flow effect of adjusting throttling passage.
The expansion valve of this temperature sensing device, because cold-producing medium generally all is a halogen, molecular weight is very big, charge between pressure behind the annular seal space of air tank head and extraneous atmospheric pressure and exist very big pressure differential, the air tank head parts are again metal parts that a plurality of pads are arranged, the careless mistake of welding and the reason of material itself, make the cold-producing medium that charges into very easily produce leakage, it is the most important reason that expansion valve lost efficacy, refrigeration system can't be worked fully, though a large amount of improvement have been done in countries in the world on material and solder technology in decades, the problem of leakage failure still can not be stopped so far, temperature sensing device is not arranged in the return passage fully simultaneously, and ambient temperature changes the operation precision that also influences valve.
Summary of the invention
The technical assignment of the technical problem to be solved in the present invention and proposition is to adopt a kind of new temperature sensing part structure to improve reliability of products.
The present invention discloses a kind of two-way heating power expansion valve structure for this reason, the left throttling conduit that this expansion valve comprises the valve body that offers first passage and second channel, be connected with described first passage and right throttling conduit and left return conduit that is connected with described second channel and right return conduit, place spool in the described first passage, run through the drive link of described first passage and second channel, the accommodation hole of described drive link, it is characterized in that, in the second channel of described valve body, be provided with and use the temperature sensing part of airtight heat sensitive wax as temperature sensor.
Further, the two-way heating power expansion valve of said structure, described temperature sensing part also comprises elastomer.Preferably, described elastomer is specially bellows or butterfly shell fragment.
Further, the two-way heating power expansion valve of said structure, described drive link and temperature sensing part are overall structure.
Further, the two-way heating power expansion valve of said structure is by being provided with encapsulant, airtight isolation first passage and second channel between drive link and accommodation hole.Preferably, described encapsulant is specially sealing ring.
Expansion valve mechanism of the present invention, use heat sensitive wax as temperature sensor, hot dynamic component after the improvement substitutes original air tank head as temperature sensing device, reduced the air-tightness requirement of temperature sensing part, solved because of the air tank head inner refrigerant leaks the expansion valve Problem of Failure that causes, simplified product structure and assembling procedure simultaneously, and the temperature sense part all places the cold-producing medium of being flowed through in the return passage to surround, be not affected by the external environment, the variations in temperature transmission is accurate.By the heat sensitive wax material of different proportionings, temperature sensing device can have specific ' temperature-volume ' change curve, and the function with refrigeration system coupling realization product improves reliability of products.
Description of drawings
Fig. 1: one of typical structure example of the two-way heating power expansion valve that the present invention provides;
Fig. 2: the temperature sensing part concrete structure that two-way heating power expansion valve uses among Fig. 1;
Fig. 3: two of the typical structure example of the two-way heating power expansion valve that the present invention provides;
Fig. 4: the temperature sensing part concrete structure that two-way heating power expansion valve uses among Fig. 3;
Fig. 4 A: the another kind of temperature sensing part concrete structure that two-way heating power expansion valve uses;
Fig. 5: three of the typical structure example of the two-way heating power expansion valve that the present invention provides;
Fig. 6: the temperature sensing part concrete structure that two-way heating power expansion valve uses among Fig. 5;
Fig. 6 A: the another kind of temperature sensing part concrete structure that two-way heating power expansion valve uses;
Fig. 7: the typical case that two-way heating power expansion valve the is applied to air-conditioning refrigeration system flow circuit diagram that freezes;
Fig. 8: the two-way heating power expansion valve exemplary block diagram of prior art.
Symbol description among the figure:
(for ease of explanation, prosign is used at identical parts/position before and after improving) 1/1 '-valve body, the right throttling conduit of 2-, 3-left side throttling conduit, the right return conduit of 4-, 5-left side return conduit, 6/6 '-spool, 7/7 '/7a/7b-drive link; The 71a/71b-transverse plane; 8/8a/8b-temperature sensing part, 81/81a/81b/81c-elastomer, 82-temperature sensor, 83-acting device, 83a-partition board portion, 83b-bar portion, 84-cylindrical shell, 85-end plate, 86-tubular part, 87-cylindrical part;
9/9a/9b-blind nut, 10-adjusting nut, 11-spool base, 12-returning spring, 13/14/15-sealing ring, 16/16 '-first passage, 16a-chamber, 17/17 '-second channel, 17a-chamber, 18-accommodation hole; 18a-stage portion, 19-valve port;
100-heating power expansion valve, 101-compressor, 102-reversal valve, 103-first heat exchanger, 105-second heat exchanger.
200-air tank head, 201-gas tank seat, 202-driver blade, 203-diaphragm, 204-gas tank lid, 205-cold-producing medium.
The specific embodiment
Heating power expansion valve of the present invention is fit to be applied to refrigeration system, because the principle of refrigeration system is basic identical, so following air-conditioning system with a kind of pump type heat is that example describes.
The typical case that Fig. 7 is applied to a kind of refrigeration system of heat pump air conditioner for the two-way heating power expansion valve flow circuit diagram that freezes.In refrigeration system, mainly comprise in the refrigerant flow path: compressor 101, reversal valve 102, heating power expansion valve 100, first heat exchanger 103 (as outdoor heat converter), second heat exchanger 105 (as indoor heat converter).
When air conditioner refrigerating moves, switch by reversal valve, the cold-producing medium circulation path is: the second channel 17 (return gas channel) of first passage 16 (throttling passage) → second heat exchanger 105 (indoor heat converter) → reversal valves 102 → heating power expansion valve 100 of gases at high pressure → reversal valve 102 → the first heat exchanger 103 (outdoor heat converter) → heating power expansion valves 100 that compressor 101 is discharged → compressor 101 sucks; When the air-conditioning heating operation, switch by reversal valve, the cold-producing medium circulation path is: the second channel 17 (return gas channel) of first passage 16 (throttling passage) → first heat exchanger 103 (outdoor heat converter) → reversal valves 102 → heating power expansion valve 100 of gases at high pressure → reversal valve 102 → the second heat exchanger 105 (indoor heat converter) → heating power expansion valves 100 that compressor 101 is discharged → compressor 101 sucks.By the throttling passage two-way operation of expansion valve, the purpose of the dual-use that makes air-conditioning realize freezing summer to heat winter.
One of typical structure example of the two-way heating power expansion valve that Fig. 1 provides for the present invention.
As shown in Figure 1.Two-way heating power expansion valve comprises the valve body 1 that offers first passage 16 and second channel 17, first passage 16 is as the throttling passage of refrigerant flow path, the two-port of passage is welded with right throttling conduit 2 and left throttling conduit 3, valve body 1 is formed with valve port 19 in this first passage 16, constitute threshold switch as the steel ball of spool 6 is relative with valve port.Second channel 17 detects the variation of the refrigerant temperature that is flowed out by upstream heat exchanger as the refrigerant flow path return passage at this, and same, the two-port of passage is welded with right return conduit 4 and left return conduit 5, is provided with temperature sensing part 8 in second channel 17.
The accommodation hole of offering by valve body 1 18, connect first passage 16 and second channel 17, drive link 7 is through accommodation hole 18, the end of drive link 7 in first passage 16 with as the steel ball butt of spool 6, the end of drive link 7 in second channel 17 is connected (in the present embodiment with described temperature sensing part 8, drive link 7 is to be made of one structure with temperature sensing part 8, what can expect is that drive link and temperature sensing part also can be used as the individual components setting that connects), be formed with stage portion 18a in the accommodation hole 18 of valve body 1, place " O " RunddichtringO 14 that is fit to size at stage portion 18a, behind sealing ring 14 pressurizeds, interior circle is near the outer wall of drive link 7, sealing ring 14 cylindricals are near the inwall of accommodation hole 18, with first passage 16 and second channel 17 airtight isolation.
At valve body 1 end of second channel 17 relatively, offer the female chamber 17a of the processing that is connected with second channel, put into temperature sensing part 8 from this chamber 17a after, with blind nut 9 temperature sensing part 8 integral sealings are fixed in the second channel.An end of being partial to first passage 16 at valve body 1 offers the female chamber 16a of the processing that is connected with first passage, and spool base 11 places the effect of passing through spring 12 in this chamber 16a, resiliency supported spool 6, and adjusting nut 10 seals chamber 16a.
Fig. 2 is the temperature sensing part concrete structure figure in the above-mentioned two-way heating power expansion valve.
Referring to Fig. 2.Temperature sensing part 8 is the closed structure of cylindrical shell 84 parcels, in its chamber, be filled with heat sensitive wax as temperature sensor 82, in chamber, also be equipped with silica gel as elastomer 81, an acting device 83 that is equivalent to piston places in the chamber, its partition board portion 83a isolates temperature sensor 82 and elastomer 81, and the 83b of its bar portion extends to outside simplified 84.
Heat sensitive wax has such characteristic: in specific temperature range, when temperature raises, by solid-state the conversion to liquid state volumetric expansion takes place; When temperature reduces, by liquid state to solid-state conversion generation volume contraction.Can determine that the specific range of temperatures of expanding with heat and contract with cold is consistent with system needed control temperature by adjusting the cured composite material ratio of temperature-sensitive.
When system works, when the temperature of the cold-producing medium in the second channel 17 of flowing through reduces, temperature sensor 82 (heat sensitive wax) smaller volume, under the effect of elastomer 81, the partition board portion 83a of acting device 83 pushes temperature sensor 82 1 sides to, the 83b of bar portion moves up, as shown in Figure 1, the bottom of the 83b of bar portion of temperature sensing part 8 is drive link 7 in this example, drive link 7 is to moving away from spool 6 directions, under the effect of returning spring 12, spool 6 is near valve ports 19, and the flow through flow of throttling passage 16 of cold-producing medium reduces; Equally when the temperature of the cold-producing medium in the second channel 17 of flowing through raises, it is big that temperature sensor 82 (heat sensitive wax) volume becomes, push the partition board portion 83a of acting device 83 to elastomer 81 1 sides, the 83b of bar portion moves down, drive link 7 moves to spool 6 directions and makes spool 6 away from valve port 19, and the flow through flow of throttling passage 16 of cold-producing medium increases.
Two of the typical structure example of the two-way heating power expansion valve that Fig. 3 provides for the present invention, Fig. 4 is the temperature sensing part concrete structure that this two-way heating power expansion valve uses.
As shown in Figure 3 and Figure 4, different with aforementioned schemes is that in temperature sensing part 8a, the bellows of tubulose is as elastomer 81a, each airtight end plate 85 that is welded with at the bellows two ends is filled with heat sensitive wax as temperature sensor 82 in the airtight chamber by bellows 81a and end plate 85 parcels.Drive link 7a is formed with the transverse plane 71a that a diameter amplifies towards temperature sensing part 8a one side, pack into second channel 17 and make the transverse plane 71a of the end plate 85 butt drive link 7a of an end of temperature sensing part 8a, the end plate 85 of the other end of blind nut 9a butt temperature sensing part 8a is fixed on warm parts 8a integral sealing in the second channel.
When system works, when the temperature of the cold-producing medium in the second channel 17 of flowing through reduces, temperature sensor 82 (heat sensitive wax) smaller volume, bellows axial shrinkage as elastomer 81a, drive link 7a is to moving away from spool 6 directions, under the effect of returning spring 12, spool 6 is near valve ports 19, and the flow through flow of throttling passage 16 of cold-producing medium reduces; Equally when the temperature rising of the cold-producing medium the second channel 17 of flowing through in, as the bellows axial elongation of elastomer 81a, drive link 7a moves to spool 6 directions and makes spool 6 away from valve port 19, the flow through flow increase of throttling passage 16 of cold-producing medium.
Three of the typical structure example of the two-way heating power expansion valve that Fig. 5 provides for the present invention, Fig. 6 is the temperature sensing part concrete structure that this two-way heating power expansion valve uses.
As shown in Figure 5 and Figure 6, different with aforementioned schemes is, in temperature sensing part 8b, the butterfly shell fragment is as the airtight two ends that are welded on a tubular part 86 of elastomer 81b, is filled with heat sensitive wax as temperature sensor 82 in the airtight chamber as two the butterfly shell fragments of elastomer 81b and tubular part 86 parcels.Drive link 7b is formed with the transverse plane 71b that a diameter amplifies towards temperature sensing part 8b one side, pack into second channel 17 and make the transverse plane 71b of the butterfly shell fragment butt drive link 7b of an end of temperature sensing part 8b, the butterfly shell fragment of the other end of blind nut 9b butt temperature sensing part 8b is fixed on temperature sensing part 8b integral sealing in the second channel.
When system works, when the temperature of the cold-producing medium in the second channel 17 of flowing through reduces, temperature sensor 82 (heat sensitive wax) smaller volume, butterfly shell fragment as elastomer 81b shrinks in cavity, drive link 7b is to moving away from spool 6 directions, under the effect of returning spring 12, spool 6 is near valve ports 19, and the flow through flow of throttling passage 16 of cold-producing medium reduces; When the temperature rising of the cryogen the second channel 17 of flowing through in, expand outside cavity as the butterfly shell fragment of elastomer 81b equally, drive link 7b moves to spool 6 directions and makes spool 6 away from valve port 19, the flow through flow increase of throttling passage 16 of cold-producing medium.
Fig. 4 A and Fig. 6 A change for the structure to temperature sensing part on the above-mentioned two-way heating power expansion valve basis that provides, the tubular construction bellows that has used an end opening in Fig. 4 A is as elastomer 81c, form chamber with end plate 85 airtight welding, in chamber, fill heat sensitive wax as temperature sensor 82; In Fig. 6 A, used the cylindrical part 87 of an end opening, form chamber with an airtight welding of the butterfly shell fragment as elastomer 81b, fill the heat sensitive wax as temperature sensor 82 in chamber, their modes of action are identical with aforementioned schemes with the effect that is risen, and do not repeat them here.
Below only be for setting forth technical scheme of the present invention; the preferred implementation that is exemplified; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. two-way heating power expansion valve, comprise the valve body (1) that offers first passage (16) and second channel (17), a left side that is connected with described first passage (16)/right throttling conduit (2)/(3) and a left side that is connected with described second channel (17)/right return conduit (4)/(5), place the spool (6) in the described first passage (16), the drive link (7) that runs through described first passage (16) and second channel (17), the accommodation hole (18) of described drive link (7), it is characterized in that, in the second channel (17) of described valve body (1), be provided with and use the temperature sensing part (8) of airtight heat sensitive wax as temperature sensor.
2. two-way heating power expansion valve as claimed in claim 1 is characterized in that, described temperature sensing part (8) also comprises elastomer (81).
3. two-way heating power expansion valve as claimed in claim 2 is characterized in that, the elastomer (81) of described temperature sensing part (8) is specially bellows.
4. two-way heating power expansion valve as claimed in claim 2 is characterized in that, (8) elastomer (81) of described temperature sensing part is specially the butterfly shell fragment.
5. two-way heating power expansion valve as claimed in claim 4 is characterized in that, has 2 as the butterfly shell fragment of described elastomer (81).
6. two-way heating power expansion valve as claimed in claim 1 or 2 is characterized in that, described drive link (7) is an overall structure with temperature sensing part (8).
7. as the described arbitrary two-way heating power expansion valve of claim 1-5, it is characterized in that, by between drive link (7) and accommodation hole (18), encapsulant being set, airtight isolation first passage (16) and second channel (17).
8. two-way heating power expansion valve as claimed in claim 7 is characterized in that, described encapsulant is specially sealing ring (14).
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200810178199 CN101738027B (en) | 2008-11-25 | 2008-11-25 | Two-way heating power expansion valve |
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| CN 200810178199 CN101738027B (en) | 2008-11-25 | 2008-11-25 | Two-way heating power expansion valve |
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| CN101738027A true CN101738027A (en) | 2010-06-16 |
| CN101738027B CN101738027B (en) | 2013-03-06 |
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| CN 200810178199 Active CN101738027B (en) | 2008-11-25 | 2008-11-25 | Two-way heating power expansion valve |
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