CN201162851Y - Self-operated three-way valve used for special machine for coolant circulating type machine room - Google Patents
Self-operated three-way valve used for special machine for coolant circulating type machine room Download PDFInfo
- Publication number
- CN201162851Y CN201162851Y CNU2008200794326U CN200820079432U CN201162851Y CN 201162851 Y CN201162851 Y CN 201162851Y CN U2008200794326 U CNU2008200794326 U CN U2008200794326U CN 200820079432 U CN200820079432 U CN 200820079432U CN 201162851 Y CN201162851 Y CN 201162851Y
- Authority
- CN
- China
- Prior art keywords
- valve
- low
- self
- operated
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Multiple-Way Valves (AREA)
Abstract
The utility model relates to a self-operated triple valve used for a refrigerant and circulation combination machine room special machine. The triple valve comprises a valve body, a low pressure air inlet pipe, a high pressure air inlet pipe and an exhaust pipe, wherein, a piston component, a valve seat and a sliding valve are arranged in the valve body, the inner cavity of the valve body can be divided into a low pressure cavity and a high pressure cavity by a piston which can move along the axial direction, the middle of the low pressure cavity and the low pressure air inlet pipe is connected with a low pressure capillary tube, the middle of the high pressure cavity and the high pressure air inlet pipe is connected with the low pressure capillary tube; and a spring is arranged in the low pressure cavity or the high pressure cavity. Through absorbing and exhausting pressure differences produced by a spring force, when a compressor is started, the piston component arranged in the valve body drives the sliding valve to slide on the surface of the valve body in an attaching way, thus realizing that the high pressure air inlet pipe is communicated with the exhaust pipe or the low pressure air inlet pipe is communicated with the exhaust pipe. The triple valve does not need any external power, and the free switch between the refrigeration cycle and the natural circulation of the refrigerant can be realized only according to the running state of the compressor, thus fully utilizing the specific energy saving advantages of the refrigerant and circulation combination room special machine, and increasing operation reliability.
Description
Technical field
The utility model relates to and a kind ofly is used for refrigerant circulation and with the self-operated three-way valve of type machine room special machine, belong to fluid machinery autocontrol valve spare, be specially adapted to the coolant natural circulation type machine room special machine, flow to by self-operated three-way valve conversion refrigerant, realize the conversion of natural circulation and refrigeration cycle.
Background technique
Along with the extensive use of mainframe computer and popularizing of mobile communication, machine room special machine equipment obtains widely applying.Because machine room special machine is the direct evaporative type air-conditioning system of year round cooling operation, even so winter of cold (when outer temperature is very low) still need carry out refrigeration cool-down in to machine room, cause annual operating cost high, the start and stop loss of refrigeration system increases, service life of a machine shortens.For reducing the energy consumption of machine room special machine, it is the coolant natural circulation type machine room special machine that Daikin Industrial Co., Ltd in 1985 is developed into the machine room special machine that has the refrigerant natural circulation, this machine is when external temperatures such as transition season or winter are low, by compressor out of service, the control mode of preferential running refrigerant natural circulation, can reduce power consumption significantly (referring to Sun Liying, horse is the best. the characteristic and the application of cryogen natural circulation air conditioner. and Harbin University of Commerce's journal (natural science edition), 2004,20 (6): 729-732.).
The structure of coolant natural circulation type machine room special machine as shown in Figure 1, it is made of outdoor unit 1, indoor units 2 two-part, constitutes an integral body by gas connection pipe 3 and liquid connecting tube 4; When outdoor temperature is low, machine room special machine is pressed natural-circulation operation, natural circulation solenoid valve 7, liquid line solenoid valve 8 are opened at this moment, refrigeration cycle solenoid valve 9 cuts out, gaseous coolant is condensed into liquid in condenser 5, flow through solenoid valve 8 and enter that heat absorption flashes to gaseous state in the vaporizer 6 is realized room temperature lowering; When outdoor temperature is higher, machine room special machine is converted to the refrigeration cycle operation, natural circulation solenoid valve 7, liquid line solenoid valve 8 are closed at this moment, refrigeration cycle solenoid valve 9 is opened, compressor 10 puts into operation, and gaseous coolant is condensed into liquid in condenser 5, after throttling arrangement 11 step-downs, evaporation heat absorption in vaporizer 6, the purpose of realization room temperature lowering.Machine room special machine is changed refrigeration cycle and natural circulation according to the height of room temperature, can reduce the energy consumption of room temperature lowering significantly.
In the coolant natural circulation type machine room special machine, the critical piece of realization refrigeration cycle and natural circulation conversion is arranged on the natural circulation solenoid valve 7 and the refrigeration cycle solenoid valve 9 that is arranged on compressor inlet or the export pipeline on the natural circulation branch road, the keying of the two is always reciprocal, refrigeration cycle solenoid valve 9 necessarily cuts out when being 7 unlatchings of natural circulation solenoid valve, refrigeration cycle solenoid valve 9 was necessarily opened when natural circulation solenoid valve 7 cut out, to realize the switching of refrigerant refrigeration cycle and natural circulation.
Though adopt two solenoid valves can realize the switching of refrigerant refrigeration cycle and natural circulation, the Security of machine room special machine operation and reliability reduction, rate of fault rising, ride quality reduced.It is in particular in:
(1) because solenoid valve inside has seal ring, frequent movement or long-term work cause seal ring distortion or sex change easily in hot environment, make solenoid valve loss of seal performance, do not have and close effect; On the other hand, the working life of solenoid valve is limited, and after surpassing certain keying number of times, solenoid valve will lose efficacy, and cause the machine room special machine fault.
(2) solenoid valve needs electric power as power, and is charged all the time during unlatching, in vain consume electric power.
(3) valve port of solenoid valve is the local resistance parts that a refrigerant flows, and no matter is refrigeration cycle or natural circulation, all will cause the pressure of refrigeration agent to reduce, and influences the performance of machine room special machine; Particularly break down can not open the time when refrigeration cycle solenoid valve 9, compressor can not aspirate the gas in the vaporizer 6, and compressor 10 delivery temperatures will be raise, and burns compressor.
Though the coolant natural circulation type machine room special machine has energy-efficient advantage on principle, yet the integrity problem that opens and closes reciprocal natural circulation solenoid valve 7 and refrigeration cycle solenoid valve 9 is still the major reason that hinders machine room special machine to apply.Therefore, press for the refrigerant refrigeration cycle that provides brand-new and the switching part of natural circulation.
The model utility content
Shortcoming at above-mentioned prior art, the purpose of this utility model provides and a kind ofly is used for refrigerant circulation and with the self-operated three-way valve of type machine room special machine, to realize freely switching of refrigerant refrigeration cycle and natural circulation, the reliability of raising system, and effectively improve the ride quality of machine room special machine.
The purpose of this utility model realizes by the following technical solutions:
A kind ofly be used for refrigerant circulation and with the self-operated three-way valve of type machine room special machine, it is characterized in that: this self-operated three-way valve contains valve body, low-pressure inlet pipe, high-pressure pipe, outlet pipe; The guiding valve that in described valve body, is provided with axially movable piston assembly, valve seat and on valve seat, moves, this piston assembly constitutes by two pistons and with connecting rod that two-piston links to each other with guiding valve, two piston end face and valve interior surface constitute low-pressure cavity and hyperbaric chamber respectively, between low-pressure cavity and low-pressure inlet pipe, be connected with the low pressure capillary tube, between hyperbaric chamber and high-pressure pipe, be connected with high pressure capillary; In described low-pressure cavity, be provided with thrust spring, or in described hyperbaric chamber, draught spring be set, or thrust spring and draught spring are set respectively in low-pressure cavity and hyperbaric chamber simultaneously.
In technique scheme of the present utility model, described guiding valve be shaped as arc shape.And symmetry offers through hole on the connecting rod of guiding valve both sides.
The self-operated three-way valve that the utility model provides, do not need any external impetus can realize the refrigeration cycle of coolant natural circulation type machine room special machine and freely switching of natural circulation, improve the reliability of machine room special machine, can give full play to the unique advantage of the machine room special machine of natural circulation and the type of using machine room special machine.Be in particular in:
1. during the refrigerant natural circulation, the frictional force that spring overcomes guiding valve promotes guiding valve and moves, and the low-pressure inlet pipe of self-operated three-way valve is communicated with outlet pipe; During refrigeration cycle, utilize the exhaust pressure of compressor to overcome the frictional force and the spring force of guiding valve, the high-pressure pipe of self-operated three-way valve is communicated with outlet pipe.Owing to rely on the method for operation that spring force or compressor are inhaled, the exhaust pressure difference is switched machine room special machine, its reliability is improved, rate of fault reduces.
2. self-operated three-way valve does not need any outside Driving force, has energy-saving effect.
3. self-operated three-way valve adopts sliding valve structure, abandoned the local resistance structure of existing solenoid valve, make local resistance reduce greatly, can connect the refrigeration cycle passage automatically behind the compressor start, the compressor that occurs never answering valve body can not open appearance burns phenomenon.
Description of drawings
Fig. 1 is prior art " coolant natural circulation type machine room special machine " fundamental diagram.
Fig. 2 is " coolant natural circulation type machine room special machine " fundamental diagram behind employing the utility model.
Fig. 3 is the valve position state of self-operated three-way valve when the refrigerant refrigeration cycle.
Fig. 4 is the valve position state of self-operated three-way valve when the refrigerant natural circulation.
Fig. 5 is another kind of embodiment's the valve position state of self-operated three-way valve when the refrigerant natural circulation.
The name of each parts is called among Fig. 1～Fig. 5:
The outdoor unit of 1-; The 2-indoor units; The 3-gas connection pipe; 4-liquid connecting tube; The 5-condenser; The 6-vaporizer; 7-natural circulation solenoid valve, 8-liquid line solenoid valve, 9-refrigeration cycle solenoid valve; The 10-compressor; The 11-throttling arrangement; The 12-self-operated three-way valve; The 13-low-pressure inlet pipe; The 14-high-pressure pipe; The 15-outlet pipe; The 16-valve body; The 17-end cap; 18-low pressure capillary tube; The 19-high pressure capillary; The 20-valve seat; The 21-spring; The 21a-thrust spring; The 21b-draught spring; The 22-piston; The 23-connecting rod; The 24-guiding valve; The 25-through hole; The 26-low-pressure cavity; The 27-hyperbaric chamber.
Embodiment
Below in conjunction with accompanying drawing to embodiment of the present utility model, working principle and working procedure further instruction.
Fig. 2 is " coolant natural circulation type machine room special machine " fundamental diagram that adopts the self-operated three-way valve that the utility model provides.Its working principle is similar substantially to prior art shown in Figure 1, and different is to have substituted the natural circulation solenoid valve 7 and the refrigeration cycle solenoid valve 9 of prior art with self-operated three-way valve 12.Its idiographic flow is as follows:
Adopt " the coolant natural circulation type machine room special machine " of self-operated three-way valve to constitute, constitute an integral body by gas connection pipe 3 and liquid connecting tube 4 by outdoor unit 1, indoor units 2 two-part.When outdoor or room temperature are hanged down, open liquid line solenoid valve 8, compressor 10 is out of service, the low-pressure inlet pipe 13 and outlet pipe 15 automatic switching ons of self-operated three-way valve 12, machine room special machine is pressed natural-circulation operation.At this moment, liquid refrigerants absorbs heat in vaporizer 6 and flashes to gaseous state, gaseous coolant rises along gas connection pipe 3, low-pressure inlet pipe 13, relief opening 15 through self-operated three-way valve 12, enter in the condenser 5 and be condensed into liquid, flow through solenoid valve 8, liquid connecting tube 4 in the Returning evaporimeter 6, are realized the room temperature lowering purpose.
When outdoor or room temperature is higher, when causing the natural circulation cooling capacity to reduce, then start compressor 10, closing liquid pipe solenoid valve 8, the high-pressure pipe 14 and outlet pipe 15 automatic switching ons of self-operated three-way valve 12 make machine room special machine move by refrigeration cycle.At this moment, compressor is draws low pressure refrigerant steam from vaporizer 6, enters at condenser 5 after compressed machine 10 compressions, and be condensed into liquid, enters heat absorption evaporation in the vaporizer 6 through throttling arrangement 11 step-downs, realizes the purpose of room temperature lowering.
The embodiment of self-operated three-way valve is as follows:
Embodiment one
Fig. 3 and Fig. 4 show a kind of structure characteristic and working state that the self-operated three-way valve of thrust spring is set in low-pressure cavity, the valve position state of self-operated three-way valve when wherein Fig. 3 is the refrigerant refrigeration cycle; The valve position state of self-operated three-way valve when Fig. 4 is the refrigerant natural circulation.
Be used for refrigerant circulation and, comprise valve body 16, low-pressure inlet pipe 13, high-pressure pipe 14 and outlet pipe 15 with the self-operated three-way valve of type machine room special machine; The guiding valve 24 that in valve body 16, is provided with axially movable piston assembly, valve seat 20 and on valve seat, moves, valve seat 20 is provided with two through holes, aligns with low-pressure inlet pipe 13 and high-pressure pipe 14; Piston assembly constitutes by two pistons 22 and with connecting rod 23 that two-piston links to each other with guiding valve, when piston assembly moves axially in valve body 16, drive guiding valve 24 and be fitted in valve seat 20 surperficial same moved further, sealing low-pressure inlet pipe 13 or high-pressure pipe 14, thus realize that high-pressure pipe 14 is communicated with outlet pipe 15 or low-pressure inlet pipe 13 is communicated with outlet pipe 15; The end cap 17 at the end face of two pistons 22, valve interior surface and valve body two ends constitutes low-pressure cavity 26 and hyperbaric chamber 27 respectively, be connected with low pressure capillary tube 18 between low-pressure cavity 26 and the low-pressure inlet pipe 13, be connected with low pressure capillary tube 19 between hyperbaric chamber 27 and the high-pressure pipe 14; In low-pressure cavity 26, be provided with thrust spring 21.In addition, in order to reduce the flow resistance of refrigerant, the shape of guiding valve 24 can adopt arc shape, and symmetry is offered through hole 25 on the connecting rod of guiding valve both sides.
When compressor 10 is shut down; piston assembly is under thrust spring 21 effects; overcome the frictional force between piston 22 and valve body 16 internal faces; move to hyperbaric chamber 27 directions; guiding valve 24 cuts out high-pressure pipe 14; low-pressure inlet pipe 13 is communicated with outlet pipe 15, and machine room special machine enters the refrigerant natural circulation.
When compressor 10 starts, compressor 10 is along the refrigerant steam in the low pressure capillary tube 18 draws low pressure chambeies 26, high pressure refrigerant steam is in high pressure capillary 19 enters hyperbaric chamber 27 simultaneously, under the effect of compressor suction, exhaust pressure difference, overcome the compressive tension and the frictional force of spring 21, promote piston assembly and move to low-pressure cavity 26 directions, guiding valve 24 cuts out low-pressure inlet pipe 13, high-pressure pipe 13 is communicated with outlet pipe 15, and machine room special machine enters the refrigerant refrigeration cycle.
Embodiment two
Fig. 5 shows a kind of structure characteristic that the self-operated three-way valve of thrust spring and draught spring is set respectively in low-pressure cavity 26 and hyperbaric chamber 27, state is the valve position state of machine room special machine when being in the refrigerant natural circulation among the figure.
In this embodiment, spring 21 in the self-operated three-way valve 12 is by being arranged on the thrust spring 21a in the low-pressure cavity 26 and being arranged on the cluster spring that the draught spring 21b in the hyperbaric chamber 27 constitutes, thrust spring 21a is consistent with the force direction of draught spring 21b, and is identical with the independent effect of thrust spring 21a that adopts in low-pressure cavity 26.
Because the reversing principle and the embodiment one of the self-operated three-way valve 12 shown in the embodiment two are identical, so locate to repeat no more.In addition, draught spring 21b is set in hyperbaric chamber 27 separately, the effect that has embodiment one and embodiment two too is so also belong to protection domain of the present utility model.
No matter be the self-operated three-way valve that adopts which kind of embodiment, refrigerant circulation and with the type machine room special machine all according to the height of indoor or outdoors temperature, start and stop compressor 10 and keying liquid line solenoid valve 8, self-operated three-way valve 12 need not any external impetus automatic switchover refrigerant flow direction, the refrigeration cycle and the natural circulation of conversion machine room special machine, can reduce the air conditioning energy consumption of room temperature lowering significantly, improve the reliability of machine room special machine, reduce maintenance expenses.
Claims (3)
1, a kind ofly is used for refrigerant circulation and with the self-operated three-way valve of type machine room special machine, it is characterized in that: this self-operated three-way valve contains valve body (16), low-pressure inlet pipe (13), high-pressure pipe (14), outlet pipe (15); The guiding valve (24) that in described valve body, is provided with axially movable piston assembly, valve seat (20) and on valve seat, moves, this piston assembly is made of two pistons (22) and the connecting rod (23) that links to each other with guiding valve with two-piston, two piston end face and valve interior surface constitute low-pressure cavity (26) and hyperbaric chamber (27) respectively, between low-pressure cavity (26) and low-pressure inlet pipe (13), be connected with low pressure capillary tube (18), between hyperbaric chamber (27) and high-pressure pipe (14), be connected with high pressure capillary (19); In described low-pressure cavity (26), be provided with thrust spring (21a), or draught spring (21b) is set, or in low-pressure cavity (26) and hyperbaric chamber (27), consistent thrust spring of force direction (21a) and draught spring (21b) are set respectively simultaneously in described hyperbaric chamber (27).
2. a kind ofly be used for refrigerant circulation and with the self-operated three-way valve of type machine room special machine, it is characterized in that according to claim 1 is described: described guiding valve be shaped as arc shape.
3. according to claim 1 and 2ly a kind ofly be used for refrigerant circulation and with the self-operated three-way valve of type machine room special machine, it is characterized in that: symmetry offers through hole (25) on the connecting rod (23) of guiding valve both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200794326U CN201162851Y (en) | 2008-03-17 | 2008-03-17 | Self-operated three-way valve used for special machine for coolant circulating type machine room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200794326U CN201162851Y (en) | 2008-03-17 | 2008-03-17 | Self-operated three-way valve used for special machine for coolant circulating type machine room |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201162851Y true CN201162851Y (en) | 2008-12-10 |
Family
ID=40183788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200794326U Expired - Lifetime CN201162851Y (en) | 2008-03-17 | 2008-03-17 | Self-operated three-way valve used for special machine for coolant circulating type machine room |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201162851Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620038A (en) * | 2011-01-26 | 2012-08-01 | 川宝科技股份有限公司 | Piston type airtight device |
| CN105508662A (en) * | 2016-01-08 | 2016-04-20 | 广东美芝制冷设备有限公司 | Three-way valve for air conditioners |
| CN105588224A (en) * | 2015-09-18 | 2016-05-18 | 青岛海信日立空调系统有限公司 | Four-way reversing valve and outdoor unit of air conditioner system |
| CN106032846A (en) * | 2015-03-17 | 2016-10-19 | 浙江盾安禾田金属有限公司 | Self-operated three-way valve and air-conditioning system thereof |
| CN106286896A (en) * | 2015-05-26 | 2017-01-04 | 浙江盾安禾田金属有限公司 | Self-operated type switching valve |
| WO2020077984A1 (en) * | 2018-10-17 | 2020-04-23 | 广东美芝精密制造有限公司 | Three-way valve, compressor assembly, refrigeration apparatus and control method therefor |
| CN111322284A (en) * | 2020-03-04 | 2020-06-23 | 韩聪 | Slide valve type one-way overflow valve |
-
2008
- 2008-03-17 CN CNU2008200794326U patent/CN201162851Y/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620038A (en) * | 2011-01-26 | 2012-08-01 | 川宝科技股份有限公司 | Piston type airtight device |
| CN106032846B (en) * | 2015-03-17 | 2019-12-24 | 浙江盾安禾田金属有限公司 | Self-operated three-way valve and air conditioning system thereof |
| CN106032846A (en) * | 2015-03-17 | 2016-10-19 | 浙江盾安禾田金属有限公司 | Self-operated three-way valve and air-conditioning system thereof |
| CN106286896B (en) * | 2015-05-26 | 2019-06-11 | 浙江盾安禾田金属有限公司 | Self-operated type switching valve |
| CN106286896A (en) * | 2015-05-26 | 2017-01-04 | 浙江盾安禾田金属有限公司 | Self-operated type switching valve |
| CN105588224A (en) * | 2015-09-18 | 2016-05-18 | 青岛海信日立空调系统有限公司 | Four-way reversing valve and outdoor unit of air conditioner system |
| CN105588224B (en) * | 2015-09-18 | 2018-05-15 | 青岛海信日立空调系统有限公司 | A kind of outdoor unit of four-way reversing valve and air-conditioning system |
| CN105508662B (en) * | 2016-01-08 | 2018-07-17 | 广东美芝制冷设备有限公司 | Triple valve for air-conditioning |
| CN105508662A (en) * | 2016-01-08 | 2016-04-20 | 广东美芝制冷设备有限公司 | Three-way valve for air conditioners |
| WO2020077984A1 (en) * | 2018-10-17 | 2020-04-23 | 广东美芝精密制造有限公司 | Three-way valve, compressor assembly, refrigeration apparatus and control method therefor |
| CN111059319A (en) * | 2018-10-17 | 2020-04-24 | 广东美芝精密制造有限公司 | Three-way valve, compressor assembly, refrigeration device and control method thereof |
| CN111059319B (en) * | 2018-10-17 | 2024-05-14 | 广东美芝精密制造有限公司 | Three-way valve, compressor assembly, refrigerating device and control method of refrigerating device |
| CN111322284A (en) * | 2020-03-04 | 2020-06-23 | 韩聪 | Slide valve type one-way overflow valve |
| CN111322284B (en) * | 2020-03-04 | 2021-12-10 | 惠民力创水利科技有限公司 | Slide valve type one-way overflow valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101245864B (en) | Self-operated three-way valve used for coolant circulating type machine room special machine | |
| CN201162851Y (en) | Self-operated three-way valve used for special machine for coolant circulating type machine room | |
| CN202215792U (en) | Slide valve type self-operated three-way change valve | |
| CN201925524U (en) | Three-way reversing valve of coolant system | |
| CN101358783A (en) | Heat pump sets for bidirectional air supply by flash evaporator | |
| CN101666386B (en) | Self-operated type three-way valve | |
| CN101319827A (en) | Multifunctional CO2 air conditioner heat pump device | |
| CN202303691U (en) | Outdoor unit of multi-connected unit of air conditioner | |
| CN201173633Y (en) | Coolant natural circulation simultaneous using type unit type air-conditioning unit | |
| CN202149649U (en) | Self-operated three-way valve | |
| CN202813879U (en) | Ultra-low temperature air-source heat pump triple-generation unit system | |
| CN102242817B (en) | Refrigerant natural circulation combined type bypass throttle valve for special machine of machine room | |
| CN101706185B (en) | Self-operated three-way reversing valve | |
| CN201391676Y (en) | Thermal expansion valve | |
| CN201554899U (en) | Self-operated three-way change valve | |
| CN202118302U (en) | Bypass throttle valve for machine special for refrigerant and natural circulation combination machine room | |
| CN112524832A (en) | Novel air-conditioning refrigeration system adopting carbon dioxide for refrigeration | |
| CN201314733Y (en) | Self-operated three-way reversing valve | |
| CN201507691U (en) | Self-operated three-way valve | |
| CN201034399Y (en) | Air-cooled heat pump separate shunt-wound hot air defrosting system | |
| CN210624798U (en) | Solar heat pump auxiliary heating device | |
| CN202158702U (en) | Self-operated three-way valve | |
| CN113154557A (en) | Quasi-two-stage compression four-pipe air conditioning system | |
| CN220828974U (en) | Cold recovery unit of air source carbon dioxide heat pump unit | |
| CN221724604U (en) | Solar energy-air source heat pump with jet enthalpy increasing function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20081210 Effective date of abandoning: 20080317 |