CN209130231U - Motor-driven valve and refrigeration system for refrigeration system - Google Patents

Abstract

The utility model provides a kind of motor-driven valve and refrigeration system for refrigeration system, motor-driven valve includes: valve body and sliding block, there is cavity, valve body is equipped with the first port for being connected to high-side heat exchanger, the second port for being connected to exhaust outlet of compressor and the third port for being connected to compressor air suction mouth in valve body；Sliding block is mounted in cavity and can switchably move between the first position and the second position, and sliding block is equipped with connected space, and connected space is connected to third port always, and first port is connected to the cavity being located at outside sliding block always；Second port is connected to by the cavity being located at outside sliding block with first port when sliding block is located at first position；Second port is connected to by connected space with third port when sliding block is located at the second position.Motor-driven valve provided by the utility model, compressor can quickly restart, while sliding block is in always under positive difference force, reduce scattering and disappearing for refrigerant heat in high-side heat exchanger.

Description

Motor-driven valve and refrigeration system for refrigeration system

Technical field

The utility model relates to refrigeration technology fields, in particular to a kind of motor-driven valve for refrigeration system and one Kind refrigeration system.

Background technique

In the refrigerating plant being commonly used, compressor from upper one backhaul row after shut down to when can be again started up, The suction side of compressor and the pressure difference of exhaust side, which have to reach in the range of some is required, can just restart, especially System biggish for refrigeration dose is carried for rotary compressor, which must reach a lesser numerical value for example Within 1kgf/cm2, starting compressor otherwise will be unable to, to quickly restart function after cannot achieve shutdown.On the other hand, existing In some designs, after compressor shutdown, the refrigerant in high-side heat exchanger can be returned to by the gap of Parts of Compressor In low-pressure side, to increase the temperature and pressure in low-side heat exchanger, in this case, it can waste in high-side heat exchanger Heat simultaneously loses the refrigerating capacity in low-side heat exchanger, is unfavorable for the operational efficiency of refrigerating plant.

For these problems, the suction side and exhaust side pressure difference of compressor can either effectively be solved by needing to design a kind of scheme The problem of excessive poor starting, and system high-low pressure can be made to be able to maintain that, system waste heat can be utilized.There are three types of at present Solution: (1) in the exhaust pipe side of compressor increase by first valve, increase bypass between the suction side and exhaust end of compressor The second valve that pipe and control bypass pipe open or close, prevents the refrigerant in high-side heat exchanger from flowing back by the first valve, To avoid the thermal loss in heat exchanger, the refrigerant in compressor High Pressure Shell is realized by the opening and closing of the second valve Rapid pressure balance with low-pressure side is to realize the purpose being quickly again started up.But the program increases the first valve, bypass The mechanism of multiple components and the corresponding control units such as pipe, the second valve, compressor and system is complicated, higher cost, and should The shortcomings that the first valve of scheme has flow resistance big, reduces system energy efficiency.(2) pilot-operated type triple valve is installed in refrigeration systems, When refrigeration system is run, pilot-operated type triple valve control exhaust outlet of compressor is connected to high-side heat exchanger；Refrigeration system stops fortune When row, pilot-operated type triple valve controls exhaust outlet of compressor and air entry is connected, while completely cutting off high pressure heat exchanger.But program line Circle is chronically at energized state, and energy consumption is high, and reliability is low.(3) common electric triple valve is used, it is electronic when refrigeration system is run Triple valve control exhaust outlet of compressor is connected to high-side heat exchanger；When refrigeration system is out of service, electric T-shaped valve control pressure Contracting machine exhaust outlet and air entry are connected, while completely cutting off high pressure heat exchanger.But the program is when refrigeration system is out of service, spool It can be jacked up by the refrigerant of high-side heat exchanger, to cause refrigeration system pressure release, cause energy loss.

Therefore, for this special application field and design requirement, low energy consumption for targeted design, connection is simple, reliable Property high and good pressure maintaining performance technical solution it is very necessary.

Utility model content

The utility model aims to solve the problem that at least one above-mentioned technical problem.

For this purpose, the purpose of the one aspect of the utility model is, a kind of motor-driven valve for refrigeration system is provided.

The purpose of the other side of the utility model is, provides a kind of including the above-mentioned motor-driven valve for refrigeration system Refrigeration system.

To achieve the goals above, the technical solution of the utility model first aspect provides a kind of for refrigeration system Motor-driven valve, comprising: valve body has cavity in the valve body, and the valve body is equipped with for being connected to high-side heat exchanger Single port, the second port for being connected to exhaust outlet of compressor and the third port for being connected to compressor air suction mouth； And sliding block, it is mounted in the cavity, and can switchably move between the first position and the second position, on the sliding block Equipped with connected space, the third port is connected to the connected space always, and the first port is always and positioned at the cunning Cavity connection outside block, the second port can connect with any of the first port and the third port It is logical；Wherein, when the sliding block is located at first position, the second port by be located at the sliding block outside the cavity with it is described First port connection；When the sliding block is located at the second position, the second port passes through the connected space and the third end Mouth connection.

The motor-driven valve for refrigeration system that the utility model above-mentioned technical proposal provides, passes through the slide block movement of motor-driven valve The mode of communicating for controlling refrigeration system pipeline can when second port is connected to by the cavity being located at outside sliding block with first port Ensure that exhaust outlet of compressor is connected to high-side heat exchanger, so that it is guaranteed that the normal refrigerating operaton of refrigeration system；When second port is logical When crossing the connected space of sliding block and being connected to third port, it can be ensured that exhaust outlet of compressor is connected to compressor air suction mouth, is realized high Side refrigerant and low side refrigerant rapid pressure balance are pressed, to realize the purpose for being quickly again started up refrigeration system, simultaneously Second port is not connected to first port, to completely cut off high-side heat exchanger, the refrigerant in high-side heat exchanger is avoided to flow back Into compressor, to avoid the thermal loss in high-side heat exchanger；Since the third port of motor-driven valve is used for and compressor Air entry connection, thus be low-pressure area always in the connected space of sliding block；The first port of motor-driven valve is used to exchange heat with high-pressure side Device connection, thus be higher-pressure region always in the cavity being located at outside sliding block, therefore no matter sliding block is located at first position or second It sets, sliding block is under positive differential pressure always, and the higher-pressure region refrigerant flowed in such first port not will push sliding block movement, from And it ensure that motor-driven valve and, to the leakproofness of refrigerant in high-side heat exchanger, and then ensure that high-pressure side refrigerant will not be electronic Pressure release at valve；Said electric valve structure, structure is simple, high reliablity, and pressure maintaining performance is good, and without refrigeration system be chronically at it is logical Electricity condition, low energy consumption.

In addition, the motor-driven valve for refrigeration system provided in the utility model above-mentioned technical proposal can also have it is as follows Additional technical feature:

In the above-mentioned technical solutions, it is preferable that the valve body has the supporting walls for being used to support the sliding block, the sliding block It is bonded towards the end face of the supporting walls with the supporting walls, the connected space has the end face for being formed in the sliding block Communication port, at least described second port and the third port are set on the supporting walls.

Above-mentioned be designed to ensure that will not be connected to by the port that sliding block covers with the port being located at outside sliding block, so that it is guaranteed that utilizing Sliding block realizes the reliability of on-off between different port；The position of above-mentioned communication port, second port and third port, so that It is more convenient to realize that action control mechanism whether second port and third port on-off is designed using slide block movement, structure is simpler Change.

In the above-mentioned technical solutions, it is preferable that the first port, the second port and the third port are set to On the supporting walls, in order to each port on valve body reasonable Arrangement position.

In the above-mentioned technical solutions, it is preferable that the sliding block is integrally in semi-cylindrical, and the sliding block is rotatably installed In the cavity, when the sliding block turns to the first position, the third port by the sliding block cover and with it is described Connected space connection, the first port and the second port are located on the outside of the sliding block；The sliding block turns to described When two positions, the third port and the second port are covered and be connected to by the connected space, institute by the sliding blocks First port is stated to be located on the outside of the sliding block.

Sliding block is switched between the first position and the second position using rotating manner, in order to rationally utilize the inside of valve body Space, preferably the setting position of arrangement sliding block and each port, and convenient for the driving mechanism of driving slide block movement on valve body Reasonable Arrangement；Certainly, sliding block can also using by the way of straight reciprocating etc. modes realize in first position and second Switch between position, and the shape of sliding block is also not necessarily limited to above-mentioned specific restriction, can according to the actual situation designed, designed and adjust It is whole.

In the above-mentioned technical solutions, it is preferable that the communication port of the connected space is in suitable with the cross sectional shape of the sliding block The sector or semicircle matched.

It is above-mentioned to be designed so that sliding block is moved along the shape track of communication port, it is ensured that third port always with the connection of sliding block Space connection；Certainly, the shape of the communication port of connected space is not limited to above-mentioned specific restriction, can voluntarily set according to the actual situation Meter and adjustment.

In any of the above-described technical solution, it is preferable that be connected with the first adapter tube, the second port at the first port Place is connected with the second adapter tube, and third adapter tube is connected at the third port, is taken at each port, in order to by motor-driven valve Smoothly it is connected in the pipeline of refrigeration system.

In any of the above-described technical solution, it is preferable that be equipped on the valve body driving motor and with the driving motor The connected transmission mechanism of output shaft, the transmission mechanism is connected with the slide block, and the driving motor passes through the driver Structure drives the sliding block switchably to move between the first position and the second position.

It being moved using driving motor and transmission mechanism mating band movable slider, structure is simple, and the control precision of slide position is high, And when refrigeration system is out of service, it is not necessarily to be chronically at energized state to the coil of driving motor transmission signal, low energy consumption, can By property height.

In the above-mentioned technical solutions, it is preferable that the valve body has the supporting walls for being used to support the sliding block, the driving Motor is installed on the wall of the valve body opposite with the supporting walls.

Above-mentioned design is convenient for driving motor and transmission mechanism, the reasonable Arrangement with each port on valve body on valve body.

The technical solution of the utility model second aspect provides a kind of refrigeration system, comprising: passes through the pressure of piping connection There is compressor air suction mouth and compressor to arrange for contracting machine, high-side heat exchanger, throttle part and low-side heat exchanger, the compressor Port；And the motor-driven valve for refrigeration system as described in any of the above-described technical solution, it is set to the compressor and the height It presses between the heat exchanger of side, the first port of the motor-driven valve is connected to the high-side heat exchanger, the second end of the motor-driven valve Mouth is connected to the exhaust outlet of compressor, and the third port of the motor-driven valve is connected to the compressor air suction mouth；Wherein, described The sliding block of the motor-driven valve is located at first position when refrigeration system operation, and the second port passes through the sky being located at outside the sliding block Chamber is connected to the first port；The refrigeration system when out of service the sliding block be located at the second position, the second port It is connected to by the connected space of the sliding block with the third port.

The refrigeration system that the utility model above-mentioned technical proposal provides controls refrigeration system by the slide block movement of motor-driven valve The mode of communicating of pipeline, in refrigeration system operation, motor-driven valve control second port is connected to first port, it is ensured that compressor row Port is connected to high-side heat exchanger, to guarantee normal refrigeration work；After refrigeration system is out of service, motor-driven valve control the Two-port netwerk is connected to third port, it is ensured that exhaust outlet of compressor is connected to compressor air suction mouth, realizes high-pressure side refrigerant and low Side refrigerant rapid pressure balance is pressed, compressor can quickly restart in the case where system pressure difference is very big；And in refrigeration system It is low-pressure area always in the connected space of the sliding block of motor-driven valve, in the cavity of the valve body outside sliding block always after out of service It is higher-pressure region, is in sliding block under positive differential pressure always, thus the refrigerant in high-side heat exchanger is prohibited to pass back into compression Inside machine, to avoid refrigeration system pressure release, the energy loss in high-side heat exchanger is delayed；Secondly, this is practical new The refrigeration system that type above-mentioned technical proposal provides, because it includes described in any of the above-described technical solution for the electronic of refrigeration system Valve, thus with the beneficial effect described in any of the above-described technical solution for the motor-driven valve of refrigeration system.

In the above-mentioned technical solutions, the refrigeration system includes: four-way valve, the four-way valve have for the compression The port of machine exhaust outlet connection, the first port are connected by the port of the four-way valve and the high-side heat exchanger It is logical.

It can use the switching that four-way valve realizes refrigeration mode and heating mode, be used for and pressure in first port and four-way valve The port connection of contracting machine exhaust outlet connection, it is ensured that no matter refrigeration mode or heating mode, namely no matter whether four-way valve commutates, Ensure that first port is connected to high-side heat exchanger always.

The additional aspect and advantage of the utility model will become obviously in following description section, or practical new by this The practice of type is recognized.

Detailed description of the invention

The above-mentioned and/or additional aspect and advantage of the utility model from the description of the embodiment in conjunction with the following figures will Become obvious and be readily appreciated that, in which:

Structural schematic diagram when Fig. 1 is the refrigeration system operation of the utility model one embodiment；

Fig. 2 is the structural schematic diagram when refrigeration system of the utility model one embodiment is out of service；

The internal port connected state section view of motor-driven valve when Fig. 3 is the refrigeration system operation of the utility model one embodiment Schematic diagram；

Fig. 4 is the internal port connected state of motor-driven valve when the refrigeration system of the utility model one embodiment is out of service Schematic cross-sectional view；

The internal port connected state of motor-driven valve is three-dimensional when Fig. 5 is the refrigeration system operation of the utility model one embodiment Schematic diagram；

Fig. 6 is the internal port connected state of motor-driven valve when the refrigeration system of the utility model one embodiment is out of service Stereoscopic schematic diagram.

Wherein, the corresponding relationship between appended drawing reference and component names of the Fig. 1 into Fig. 6 are as follows:

1 compressor, 2 liquid storage devices, 3 exhaust outlet of compressor, 4 compressor air suction mouths, 5 motor-driven valves, 6 high-side heat exchangers, 7 sections Stream unit, 8 low-side heat exchangers；

51 valve bodies, 511 supporting walls, 52 sliding blocks, 53 first adapter tubes, 54 second adapter tubes, 55 thirds adapter tube；

A first port, B second port, C third port, D are located at the cavity outside sliding block, E connected space, the higher-pressure region P1, P2 Low-pressure area.

Specific embodiment

In order to be more clearly understood that the above objects, features, and advantages of the utility model, with reference to the accompanying drawing and have The utility model is further described in detail in body embodiment.It should be noted that in the absence of conflict, this Shen The feature in embodiment and embodiment please can be combined with each other.

Many details are explained in the following description in order to fully understand the utility model, still, this is practical Novel to be implemented using other than the one described here other modes, therefore, the protection scope of the utility model is simultaneously It is not limited by the specific embodiments disclosed below.

Referring to Fig. 1 to Fig. 6 description for the electronic of refrigeration system according to some embodiments of the utility model Valve and refrigeration system.

As depicted in figs. 1 and 2, the refrigeration system that some embodiments according to the present utility model provide, comprising: pass through pipeline Compressor 1, high-side heat exchanger 6, throttle part 7 and the low-side heat exchanger 8 of connection, in compressor 1 and high-side heat exchanger 6 Between be provided with the motor-driven valve 5 of control refrigeration system pressure, liquid storage device 2, exhaust outlet of compressor 3 and pressure are provided on compressor 1 Contracting machine air entry 4.

As shown in Figures 1 to 6, it is provided according to the embodiment of the utility model first aspect a kind of for refrigeration system Motor-driven valve 5, comprising: valve body 51 and sliding block 52.

Specifically, as depicted in figs. 1 and 2, there is cavity, valve body 51, which is equipped with, to be used for and high-side heat exchanger in valve body 51 6 connection first port A, the second port B for be connected to exhaust outlet of compressor 3 and be used for and compressor air suction mouth 4 company Logical third port C；As shown in Figures 3 to 6, sliding block 52 is mounted in cavity, and can first position and the second position it Between switchably move, sliding block 52 is equipped with connected space E, and third port C is connected to the connected space E of sliding block 52 always, the Single port A always be located at sliding block 52 outside cavity D be connected to, second port B can in first port A and third port C Any one connection；Wherein, as shown in Figure 3 and Figure 5, when sliding block 52 is located at first position, second port B is by being located at outside sliding block 52 Cavity D be connected to first port A；As shown in Figure 4 and Figure 6, when sliding block 52 is located at the second position, second port B passes through sliding block 52 connected space E is connected to third port C.

The utility model motor-driven valve 5 provided by the above embodiment for refrigeration system is transported by the sliding block 52 of motor-driven valve 5 The mode of communicating of dynamic control refrigeration system pipeline, when second port B is connected by the cavity D and first port A being located at outside sliding block 52 When logical, it can be ensured that exhaust outlet of compressor 3 is connected to high-side heat exchanger 6, so that it is guaranteed that the normal refrigerating operaton of refrigeration system；When When Two-port netwerk B is connected to by the connected space E of sliding block 52 with third port C, it can be ensured that exhaust outlet of compressor 3 and compressor air suction Mouth 4 is connected to, and realizes high-pressure side refrigerant and low side refrigerant rapid pressure balance, so that realization is quick to be again started up refrigeration system The purpose of system, while second port B is not connected to first port A, to completely cut off high-side heat exchanger 6, high-pressure side is avoided to exchange heat Refrigerant in device 6 is back in compressor, to avoid the thermal loss in high-side heat exchanger 6；Due to the of motor-driven valve 5 Three port C are low-pressure area always in the connected space E of sliding block 52 for being connected to compressor air suction mouth 4；Motor-driven valve 5 First port A is higher-pressure region P1 always for being connected to high-side heat exchanger 6, thus in the cavity D being located at outside sliding block 52, therefore No matter sliding block 52 is located at first position or the second position, and sliding block 52 under positive differential pressure, flows in such first port A always Dynamic higher-pressure region refrigerant not will push the movement of sliding block 52, to ensure that motor-driven valve 5 to refrigerant in high-side heat exchanger 6 Leakproofness, and then ensure that high-pressure side refrigerant will not the pressure release at motor-driven valve 5；5 structure of said electric valve, structure is simple, can By property height, pressure maintaining performance is good, and is chronically at energized state without refrigeration system, and low energy consumption.

In one embodiment of the utility model, as shown in Figure 5 and Figure 6, valve body 51, which has, is used to support sliding block 52 The end face of supporting walls 511, sliding block 52 towards supporting walls 511 is bonded with supporting walls 511, and connected space E, which has, is formed in sliding block 52 End face communication port, at least second port B and third port C are set on supporting walls 511.It is above-mentioned to be designed to ensure that by sliding block 52 ports covered will not be connected to the port being located at outside sliding block 52, be led between different port so that it is guaranteed that being realized using sliding block 52 Disconnected reliability；The position of above-mentioned communication port, second port B and third port C, so that realizing the using the movement of sliding block 52 Two-port netwerk B and action control mechanism design whether third port C on-off are more convenient, and structure is more simplified.Preferably, first port A, second port B and third port C are set on supporting walls 511, in order to each port on valve body 51 reasonable Arrangement position.

In a specific embodiment of the utility model, as shown in Figures 3 to 6, whole sliding block 52 is in semi-cylindrical, sliding Block 52 is rotatably mounted in cavity, when sliding block 52 turns to first position, third port C by sliding block 52 cover and with even Logical space E connection, first port A and second port B are located at 52 outside of sliding block；When sliding block 52 turns to the second position, third end Mouth C and second port B is covered by sliding block 52 and is connected to by the connected space E of sliding block 52, and first port A is located at outside sliding block 52 Side.

It should be noted that when sliding block 52 turns to the second position, as shown in fig. 6, second port B can be entirely located in cunning In the regional scope of the communication port of block 52, it is connected to the entire port second port B with third port C；As shown in figure 4, second Port B can also be partially in the regional scope of the communication port of sliding block 52, and another part second port B is by 52 direction of sliding block The end face of 51 supporting walls 511 of valve body is blocked, and is connected to second port part B port with third port C.

Sliding block 52 is switched between the first position and the second position using rotating manner, in order to rationally utilize valve body 51 Inner space, preferably the setting position of arrangement sliding block 52 and each port, and the driving mechanism moved convenient for driving sliding block 52 Reasonable Arrangement on valve body 51；Certainly, sliding block 52 can also using by the way of straight reciprocating etc. modes realize Switch between one position and the second position, and the shape of sliding block 52 is also not necessarily limited to above-mentioned specific restriction, it can be according to practical feelings Condition designed, designed and adjustment.

Preferably, the communication port of connected space E is in the sector or semicircle being adapted to the cross sectional shape of sliding block 52.Such as figure Shown in 3 and Fig. 4, the communication port of connected space E is fan-shaped；As shown in Figure 5 and Figure 6, the communication port semicircular in shape of connected space E； It is above-mentioned to be designed so that sliding block 52 is moved along the shape track of communication port, it is ensured that third port C is empty with the connection of sliding block 52 always Between E be connected to；Certainly, the shape of the communication port of connected space E is not limited to above-mentioned specific restriction, can voluntarily set according to the actual situation Meter and adjustment.

In one embodiment of the utility model, as shown in Figure 5 and Figure 6, the first adapter tube is connected at first port A It is connected with the second adapter tube 54 at 53, second port B, is connected with third adapter tube 55 at third port C, is taken at each port, In order to which motor-driven valve 5 is smoothly connected in the pipeline of refrigeration system.

In some embodiments of the utility model, as shown in Figure 5 and Figure 6, be equipped on valve body 51 driving motor and with The connected transmission mechanism (not shown) of the output shaft of driving motor, transmission mechanism are connect with sliding block 52, and driving motor passes through transmission Mechanism driving sliding block 52 switchably moves between the first position and the second position.Using driving motor (such as stepper motor) and The movement of transmission mechanism (such as gear) mating band movable slider, structure is simple, and the control precision of slide position is high, and when refrigeration system is stopped When only running, it is not necessarily to be chronically at energized state to the coil of driving motor transmission signal, low energy consumption, high reliablity.

Preferably, as shown in Figure 5 and Figure 6, valve body 51 has the supporting walls 511 for being used to support sliding block 52, driving motor peace On wall loaded on the valve body 51 opposite with supporting walls 511.Above-mentioned design convenient for driving motor and transmission mechanism, with it is each on valve body Reasonable Arrangement of a port on valve body.

In one specific embodiment, as shown in Figure 5 and Figure 6, first port A, second end are provided on the bottom wall of valve body 51 Mouth B and third port C, sliding block 52 are supported on the bottom wall of valve body 51, and the lower end surface of sliding block 52 is bonded with the bottom wall of valve body 51, even Logical space E has the communication port for the lower end surface for being formed in sliding block 52, and third port C is connected to communication port always, and first port A begins It is connected to eventually with the cavity for the valve body 51 being located at outside sliding block 52；Whole sliding block 52 is in semi-cylindrical, and sliding block 52 is rotatably installed In cavity, and can switchably it rotate between the first position and the second position, when sliding block 52 is located at first position, second Port B is connected to by the cavity D being located at outside sliding block 52 with first port A；When sliding block 52 is located at the second position, second port B is logical Connected space E is crossed to be connected to third port C；The top of valve body 51 is equipped with driving motor, the output shaft and sliding block of driving motor Transmission mechanism is connected between 52.

As depicted in figs. 1 and 2, the embodiment of the utility model second aspect provides a kind of refrigeration system, comprising: passes through Compressor 1, high-side heat exchanger 6, throttle part 7 and the low-side heat exchanger 8 of piping connection, compressor have compressor air suction Mouth 4 and exhaust outlet of compressor 3；With the motor-driven valve 5 for refrigeration system of such as above-mentioned any embodiment, motor-driven valve 5 is set to compression Between machine and high-side heat exchanger 6, the first port A of motor-driven valve 5 is connected to high-side heat exchanger 6, the second port of motor-driven valve 5 B is connected to exhaust outlet of compressor 3, and the third port C of motor-driven valve 5 is connected to compressor air suction mouth 4；Wherein, refrigeration system is run When motor-driven valve 5 sliding block 52 be located at first position, second port B passes through the cavity D being located at outside sliding block 52 and first port A connects It is logical；Sliding block 52 is located at the second position when refrigeration system is out of service, and second port B passes through the connected space E and third of sliding block 52 Port C connection.

The utility model refrigeration system provided by the above embodiment, being freezed by 52 motion control of sliding block of motor-driven valve 5 is The mode of communicating on road under the overall leadership, in refrigeration system operation, motor-driven valve 5 controls second port B and is connected to first port A, it is ensured that pressure Contracting machine exhaust outlet 3 is connected to high-side heat exchanger 6, to guarantee normal refrigeration work；It is electronic after refrigeration system is out of service Valve 5 controls second port B and is connected to third port C, it is ensured that exhaust outlet of compressor 3 is connected to compressor air suction mouth 4, realizes high pressure Side refrigerant and low side refrigerant rapid pressure balance, compressor can quickly restart in the case where system pressure difference is very big； It is low-pressure area always in the connected space E of the sliding block 52 of motor-driven valve 5 and after refrigeration system is out of service, is located at outside sliding block 52 Valve body 51 cavity in be higher-pressure region always, make sliding block 52 always under the positive differential pressure, thus in high-side heat exchanger 6 Refrigerant is prohibited to pass back into inside compressor, to avoid refrigeration system pressure release, has delayed in high-side heat exchanger 6 Energy loss；Secondly, the utility model refrigeration system provided by the above embodiment, because it includes being used for for any of the above-described embodiment The motor-driven valve 5 of refrigeration system, thus the beneficial effect of the motor-driven valve 5 for refrigeration system with any of the above-described embodiment, This is repeated no more.

In one specific embodiment, refrigeration system includes: compressor 1, has closed inner space, and compressor 1 can be with For rotor-type compressor or other types of compressor；Compression set is set to inside compressor, and has compression space, For refrigerant compression；Compressor air suction mouth 4, guidance refrigerant enter the compression set；Exhaust outlet of compressor 3, guidance system Shell is discharged in cryogen；Heat exchanger is externally exchanged for refrigerant heat；Motor-driven valve 5 is used for control system pipeline getting type, And have first port A, second port B, third port C and sliding block 52.When refrigeration system operation, that is, compress When the compression set of machine compresses refrigerant, motor-driven valve 5 controls second port B and is connected to first port A；When refrigeration system stops transporting When row, that is, the compression set of compressor shuts down, and when not recompressing refrigerant, motor-driven valve 5 controls second port B and the Three port C connection.The connection for having connected space E, second port B and third port C on sliding block 52 is by the company on sliding block 52 What logical space E was completed.It is always higher-pressure region on the outside of sliding block 52, the connected space E inside sliding block 52 is always low-pressure area, no matter system Cooling system is in operating status or halted state, the sliding block 52 of motor-driven valve 5 are under positive differential pressure always.

Preferably, first port A is connected to high-side heat exchanger 6, and second port B is connected to exhaust outlet of compressor 3, third Port C is connected to compressor air suction mouth 4；Certainly, second port B is also directly inserted into the enclosure interior of compressor, third end Mouth C can also be directly connected to liquid storage device 2.

In one embodiment of the utility model, as depicted in figs. 1 and 2, refrigeration system includes: four-way valve 9, four-way valve 9 have the port for being connected to exhaust outlet of compressor 3, the port and high-side heat exchanger of first port A by four-way valve 9 6 connections.Can use the switching that four-way valve 9 realizes refrigeration mode and heating mode, on first port A and four-way valve 9 for Exhaust outlet of compressor 3 be connected to port connection, it is ensured that no matter refrigeration mode or heating mode, namely no matter four-way valve 9 whether Commutation, ensures that first port A is connected to high-side heat exchanger 6 always.

In one specific example, as depicted in figs. 1 and 2, refrigeration system includes compressor 1, high-side heat exchanger 6, throttling Component 7 and low-side heat exchanger 8 are provided with control refrigeration system pressure between compressor 1 and high-side heat exchanger 6 Motor-driven valve 5.Liquid storage device 2, exhaust outlet of compressor 3 and compressor air suction mouth 4 are provided on compressor 1.There are three motor-driven valves 5 Port: first port A, second port B and third port C；Sliding block 52 is provided in the valve body 51 of motor-driven valve 5, sliding block 52 is can To control the mechanism of two flow path B-A connection or the B-C connection switching of motor-driven valve 5.As shown in figure 3, the first port of motor-driven valve 5 A is connected to refrigeration system high pressure side heat exchanger 6, therefore the region P1 in first port A is higher-pressure region；Second port B and compression Machine exhaust outlet 3 is connected to, and third port C is connected to compressor air suction mouth 4, therefore the region P2 in third port C is low-pressure area.

As shown in Figure 1, since the refrigeration system mesohigh side region P1 and the region low-pressure side P2 pressure difference are larger, for example, at present Widely used R410A refrigerant, pressure difference when generally working normally are 1~2MPa, therefore only according to common triple valve It is sealed by the mechanical force of main valve plug, it will usually the phenomenon that high-pressure side refrigerant opens spool occur.Even if only opening one Gap, the refrigerant that can also rapidly cause high pressure heat exchanger high temperature high pressure is flowed into low pressure heat exchanger, to cause height Press heat exchanger energy loss.And the utility model utilizes refrigeration system when using sliding block (or being " spool ") switching flow path Pressure difference forward extrusion sliding block, the sealing of sliding block can be improved, for slow down the energy loss in high pressure heat exchanger have it is important Meaning.

The utility model considers pressure difference in the presence of may cause the case where spool is jacked up, and provides a kind of new motor-driven valve Structure.When refrigeration system operation, as shown in Fig. 3 and Fig. 5, sliding block 52 covers third port C at this time, due to third port C Always it is connected to compressor air suction mouth 4, the connected space E inside sliding block 52 is low-pressure area P2 at this time；And at this time second port B with First port A is not covered by sliding block, and two ports are internally located at the regional connectivity outside sliding block 52 in valve body 51, due to first end Mouth A connection high-side heat exchanger 6, therefore the side valve inner higher-pressure region P1 refrigerant can be pressed down against sliding block 52 at this time.

When refrigeration system is out of service, sliding block 52 rotates by a certain angle, and as shown in Fig. 4 and Fig. 6, sliding block 52 will be electric at this time The third port C of dynamic valve 5 is covered together with second port B, and the connected space E inside sliding block 52 is by second port B and the at this time Three port C connection, since second port B is connected to exhaust outlet of compressor 3, third port C is connected to compressor air suction mouth 4, because Compressor is inhaled at this time, exhaust two sides are connected to for this, and compressor is inhaled, the pressure difference of exhaust two sides is balanced, and compressor can satisfy again It is secondary quickly to restart function；The high-side heat exchanger 6 of the first port A connection refrigeration system of motor-driven valve 5 at this time, therefore motor-driven valve 5 The region P1 that is not covered by sliding block of valve inner be higher-pressure region, and the inside connected space E covered by sliding block is low-pressure area P2.Therefore, when refrigeration system is out of service, sliding block nevertheless suffers from the downward difference force of refrigerant, ensure that high-pressure side is freezed Agent will not the pressure release at motor-driven valve.

Specifically, the refrigeration system can be air-conditioning refrigeration system etc..

In conclusion the motor-driven valve provided by the embodiment of the utility model for refrigeration system, compressor can be weighed quickly It opens, the refrigerant in high-side heat exchanger is trapped when system stops, and reduces refrigerant heat in high-side heat exchanger It scatters and disappears；Simultaneously in the course of work of motor-driven valve, sliding block is in always under positive difference force, ensure that motor-driven valve for high pressure The leakproofness of refrigerant in the heat exchanger of side.

In the description of the utility model, it is to be understood that the orientation of the instructions such as term " on ", "lower", "inner", "outside" or Positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing the present invention and simplifying the description, Rather than the device or unit of indication or suggestion meaning must have specific direction, be constructed and operated in a specific orientation, because This, should not be understood as limiting the present invention.

In the description of the present invention, unless otherwise clearly defined and limited, term " connected ", " connection ", " Gu It is fixed " etc. shall be understood in a broad sense, for example, " connection " may be a fixed connection, may be a detachable connection, or integrally connect It connects, or electrical connection；It can be directly connected, it can also be indirectly connected through an intermediary.For the ordinary skill people of this field For member, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc. Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least the one of the utility model In a embodiment or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment Or example.Moreover, the particular features, structures, materials, or characteristics of description can be in any one or more embodiment or examples In can be combined in any suitable manner.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.

Claims (10)

1. a kind of motor-driven valve for refrigeration system characterized by comprising

Valve body, the valve body is interior to have cavity, and the valve body is equipped with first port, use for being connected to high-side heat exchanger In the second port being connected to exhaust outlet of compressor and third port for being connected to compressor air suction mouth；With

Sliding block is mounted in the cavity, and can switchably be moved between the first position and the second position, the sliding block It is equipped with connected space, the third port is connected to the connected space always, and the first port is always and positioned at described Cavity connection outside sliding block, the second port can connect with any of the first port and the third port It is logical；

Wherein, when the sliding block is located at first position, the second port passes through the cavity being located at outside the sliding block and institute State first port connection；When the sliding block is located at the second position, the second port passes through the connected space and the third Port connection.

2. the motor-driven valve according to claim 1 for refrigeration system, which is characterized in that

The valve body has the supporting walls for being used to support the sliding block, end face and the branch of the sliding block towards the supporting walls Support wall fitting, the connected space have be formed in the sliding block the end face communication port, at least described second port and The third port is set on the supporting walls.

3. the motor-driven valve according to claim 2 for refrigeration system, which is characterized in that

The first port, the second port and the third port are set on the supporting walls.

4. the motor-driven valve according to claim 2 for refrigeration system, which is characterized in that

The sliding block is integrally in semi-cylindrical, and the sliding block is rotatably mounted in the cavity, and the sliding block turns to When the first position, the third port is covered and be connected to the connected space by the sliding block, the first port and The second port is located on the outside of the sliding block；When the sliding block turns to the second position, the third port and described Second port is covered by the sliding block and is connected to by the connected space, and the first port is located on the outside of the sliding block.

5. the motor-driven valve according to claim 4 for refrigeration system, which is characterized in that

The communication port of the connected space is in the sector or semicircle being adapted to the cross sectional shape of the sliding block.

6. the motor-driven valve according to any one of claim 1 to 5 for refrigeration system, which is characterized in that

It is connected with the first adapter tube at the first port, is connected with the second adapter tube at the second port, at the third port It is connected with third adapter tube.

7. the motor-driven valve according to any one of claim 1 to 5 for refrigeration system, which is characterized in that

The transmission mechanism for being equipped with driving motor on the valve body and being connected with the output shaft of the driving motor, the driver Structure is connected with the slide block, and the driving motor drives the sliding block in the first position and described by the transmission mechanism It is switchably moved between the second position.

8. the motor-driven valve according to claim 7 for refrigeration system, which is characterized in that

The valve body has the supporting walls for being used to support the sliding block, and the driving motor is installed on opposite with the supporting walls On the wall of the valve body.

9. a kind of refrigeration system characterized by comprising

By the compressor of piping connection, high-side heat exchanger, throttle part and low-side heat exchanger, the compressor has pressure Contracting machine air entry and exhaust outlet of compressor；And

Such as the motor-driven valve described in any item of the claim 1 to 8 for refrigeration system, it is set to the compressor and the high pressure Between the heat exchanger of side, the first port of the motor-driven valve is connected to the high-side heat exchanger, the second port of the motor-driven valve It is connected to the exhaust outlet of compressor, the third port of the motor-driven valve is connected to the compressor air suction mouth；

Wherein, the sliding block of the motor-driven valve is located at first position when the refrigeration system is run, and the second port is by being located at Cavity outside the sliding block is connected to the first port；The refrigeration system when out of service the sliding block be located at second It sets, the second port is connected to by the connected space of the sliding block with the third port.

10. refrigeration system according to claim 9 characterized by comprising

Four-way valve, the four-way valve have the port for being connected to the exhaust outlet of compressor, and the first port passes through institute The port for stating four-way valve is connected to the high-side heat exchanger.