Bistable multi-way reversing valve, refrigerating system and air-conditioning water heater system

Abstract

The utility model discloses a bistable multi-way reversing valve which comprises a valve body with a valve cavity, the valve body is provided with a plurality of connecting pipes, the bistable multi-way reversing valve further comprises a stepping motor, a screw transmission shaft, a screw sleeve, a movable frame and a reversing sliding block, the stepping motor is installed at one end of the valve body and is in power connection with the screw transmission shaft, the movable frame is movably installed in the valve cavity, and the reversing sliding block is connected with the screw transmission shaft. The reversing sliding block is installed on the movable frame, the screw rod sleeve is fixedly connected with the movable frame and movably arranged on the periphery of the screw rod transmission shaft in a sleeving mode, and under driving of the stepping motor, the reversing sliding block can slide to one working position to conduct two connecting pipes in the multiple connecting pipes or slide to the other working position to separate the two connecting pipes. According to the multi-way reversing valve, reversing can be conducted without pressure difference, physical damage to the reversing sliding block is reduced, and the needed communicating position can be well switched before a compressor is started. Therefore, the problems of blow-by, gas leakage, jamming and the like caused by improper reversing or even incapability of reversing are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electromagnetic valves, in particular to a bistable multi-way reversing valve. Background Art

[0002] Air conditioners are mainly composed of refrigeration system, air duct system, structural system and electrical system. As an important part of the refrigeration system, the quality of valve parts will directly affect the quality of the product.

[0003] The three-way valve or four-way valve used in the refrigeration system is a key component in the heat pump air conditioner. It plays the role of switching between cooling and heating in the refrigeration system. It achieves the purpose of cooling and heating by changing the direction of the compressor exhaust pipe and the return air pipe entering the evaporator and condenser.

[0004] As shown in the Chinese utility model patent application with publication number CN 102109058 A, most of the existing three-way valves or four-way valves are similar to the above application, and the general structure is: composed of three parts: a pilot valve, a main valve and an electromagnetic coil. The pilot valve is used to control the main valve, and the pressure difference switching action is used for switching. The existing structure generally has insufficient pressure difference, which leads to cross-flow. Utility Model Content

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a bistable multi-way reversing valve, which effectively solves the problem of gas cross-talk in the prior art in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bistable multi-channel reversing valve, comprising a valve body with a valve cavity, the valve body is provided with a plurality of connecting pipes, and also comprises a stepping motor, a screw drive shaft, a screw sleeve, a movable frame and a reversing slider, the stepping motor is installed at one end of the valve body and is connected to the screw drive shaft, the movable frame is movably installed in the valve cavity, the reversing slider is installed on the movable frame, the screw sleeve is fixedly connected to the movable frame and is movably mounted on the outer periphery of the screw drive shaft, and under the drive of the stepping motor, the reversing slider can slide to one of the working positions to connect two of the plurality of connecting pipes or slide to another working position to separate the two connecting pipes.

[0007] Therefore, the utility model provides a multi-way reversing valve with a new structure. The number of connecting pipes can be set according to actual needs, thereby obtaining a three-way valve or a four-way valve. The working principle of the multi-way reversing valve is: the movable frame is driven by a stepper motor to move in the valve cavity, thereby realizing the reciprocating motion of the reversing slider. The advantages of the utility model over the prior art are: reversing can be performed without pressure difference, reducing the physical damage of the reversing slider, and the required connection position can be switched before the compressor is started. Therefore, there will be no problems such as incomplete reversing, or even inability to reversing, resulting in cross-flow, leakage, or jamming, and after the conversion is completed, it can maintain a stable state without energy maintenance, further saving energy.

[0008] Preferably, the bistable multi-way reversing valve also includes a valve seat, the connecting pipes include a first connecting pipe, a second connecting pipe and a third connecting pipe, the first connecting pipe is always connected to the valve chamber, the second connecting pipe and the third connecting pipe are arranged on the valve seat, and the reversing slider can move on the valve seat to change the on-off between the second connecting pipe and the third connecting pipe.

[0009] Preferably, the connecting pipe further includes a fourth connecting pipe, and the fourth connecting pipe is arranged side by side with the second connecting pipe and the third connecting pipe on the valve seat.

[0010] Preferably, the stepper motor includes a housing, a composite coil and a composite permanent magnet rotor, the housing is fixedly mounted on the end of the valve body, the composite permanent magnet rotor is sleeved on the end of the screw drive shaft away from the screw sleeve and is located in the housing, and the composite coil is mounted on the housing and sleeved on the outer periphery of the composite permanent magnet rotor. Thus, the composite coil and the composite permanent magnet rotor are used to cooperate to generate driving force, and after the conversion is completed, a stable state can be maintained without energy maintenance.

[0011] Preferably, the movable frame includes a slider side plate and a reversing slider pressure plate, the slider side plates are a pair, a pair of slider side plates are vertically installed in the valve cavity and are respectively located on both sides of the reversing slider, the two ends of the reversing slider pressure plate are respectively connected to the pair of slider side plates, the reversing slider is fixedly installed on the reversing slider pressure plate, and the screw sleeve is fixedly installed on the outer side of one of the slider side plates.

[0012] To achieve the above-mentioned purpose, the utility model also provides the following technical solution: a refrigeration system, including a compressor, a condenser, an evaporator and a four-way valve, characterized in that the four-way valve adopts the above-mentioned bistable multi-way reversing valve, the first connecting pipe is connected to the exhaust port of the compressor, the third connecting pipe is connected to the suction port of the compressor, the second connecting pipe is connected to the outlet end of the evaporator, and the fourth connecting pipe is connected to the inlet end of the condenser.

[0013] Therefore, the refrigeration system of the utility model adopts the above-mentioned bistable multi-way reversing valve, has no cross-flow phenomenon, and has a low failure rate.

[0014] Preferably, the refrigeration system further comprises a throttling element, the outlet end of the condenser is connected to the inlet end of the evaporator, and the throttling element is arranged between the two.

[0015] To achieve the above-mentioned purpose, the utility model also provides the following technical solutions: an air-conditioning water heater system, comprising a compressor, an outdoor heat exchanger, an indoor heat exchanger, a water heat exchanger and a four-way valve, the four-way valve adopts the above-mentioned bistable multi-way reversing valve, the first connecting pipe is connected to the exhaust port of the compressor, the third connecting pipe is connected to the intake port of the compressor, the second connecting pipe is connected to the outlet end of the outdoor heat exchanger, the third connecting pipe is connected to the outlet end of the indoor heat exchanger, the fourth connecting pipe is connected to the inlet end of the water heat exchanger, and the outlet end of the water heat exchanger is respectively connected to the inlet ends of the outdoor heat exchanger and the indoor heat exchanger.

[0016] Therefore, the air-conditioning water heater system of the utility model adopts the above-mentioned bistable multi-way reversing valve, has no cross-flow phenomenon, and has a low failure rate.

[0017] Preferably, the air conditioning water heater system also includes a throttling element, which includes a first throttling element and a second throttling element. The first throttling element is arranged at the outlet end of the water heat exchanger and the inlet end of the outdoor heat exchanger, and the second throttling element is arranged at the outlet end of the water heat exchanger and the inlet end of the indoor heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0019] In the attached picture:

[0020] Figure 1 This is a simplified structural diagram of a bistable multi-way reversing valve according to the first embodiment of the utility model;

[0021] Figure 2 for Figure 1 A schematic diagram of the structure of the bistable multi-way directional valve in another state is shown;

[0022] Figure 3 This is a simplified structural diagram of a bistable multi-way reversing valve according to the second embodiment of the utility model;

[0023] Figure 4 for Figure 3 A schematic diagram of the structure of the bistable multi-way directional valve in another state is shown;

[0024] Figure 5 This is a simplified structural diagram of a refrigeration system according to Embodiment 3 of the present utility model;

[0025] Figure 6 It is a simplified structural diagram of the air-conditioning water heater system of the fourth embodiment of the utility model.

[0026] In the figure: 1- compressor; 2- condenser; 3- evaporator; 4- throttling element; 4a- first throttling element; 4b- second throttling element; 5- four-way valve; 6- water heat exchanger; 7- outdoor heat exchanger; 8- indoor heat exchanger; 51, valve body; 52, connecting pipe; 52D- first connecting pipe; 52E- second connecting pipe; 52S- third connecting pipe; 52C- fourth connecting pipe; 53, stepping motor; 54- screw drive shaft; 55- screw sleeve; 56- movable frame; 57- reversing slider; 58- valve seat; 510, valve cavity; 531- shell; 532- composite coil; 533- composite permanent magnet rotor; 561- slider side plate; 562- reversing slider pressure plate. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0028] Embodiment 1, by Figure 1 to Figure 2 It is given that the bistable multi-way reversing valve of this embodiment includes a valve body 51 with a valve cavity 510, the valve body 51 is provided with multiple connecting pipes 52, and also includes a stepping motor 53, a screw transmission shaft 54, a screw sleeve 55, a movable frame 56 and a reversing slider 57. The stepping motor 53 is installed at one end of the valve body 51 and the rotor is connected to the screw transmission shaft 54. The movable frame 56 is movably installed in the valve cavity 510, and the reversing slider 57 is installed on the movable frame 56. The screw sleeve 55 is fixedly connected to the movable frame 56 and can be movably mounted on the outer periphery of the screw transmission shaft 54. Under the drive of the stepping motor 53, the reversing slider 57 can slide to one of the working positions to connect two of the multiple connecting pipes 52 or slide to another working position to separate the two connecting pipes 52.

[0029] The bistable multi-way reversing valve also includes a valve seat 58, and the connecting pipe 52 includes a first connecting pipe 52D, a second connecting pipe 52E and a third connecting pipe 52S. The first connecting pipe 52D is always connected to the valve chamber 510, and the second connecting pipe 52E and the third connecting pipe 52S are arranged on the valve seat 58. The reversing slider 57 can move on the valve seat 58 to change the on-off state between the second connecting pipe 52E and the third connecting pipe 52S.

[0030] The stepper motor 53 includes a housing 531, a composite coil 532 and a composite permanent magnet rotor 533. The housing 531 is fixedly mounted on the end of the valve body 51. The composite permanent magnet rotor 533 is sleeved on the other end of the screw transmission shaft 54 ​​away from the screw sleeve 55 and is located in the housing 531. The composite coil 532 is mounted on the housing 531 and sleeved on the outer periphery of the composite permanent magnet rotor 533. Thus, the composite coil 532 and the composite permanent magnet rotor 533 are used to cooperate to generate driving force, and after the conversion is completed, a stable state can be maintained without energy maintenance.

[0031] The movable frame 56 includes a slider side plate 561 and a reversing slider pressure plate 562. The slider side plates 561 are a pair. A pair of slider side plates 561 are vertically installed in the valve cavity 510 and are respectively located on both sides of the reversing slider 57. The two ends of the reversing slider pressure plate 562 are respectively connected to the pair of slider side plates 561. The reversing slider 57 is fixedly installed on the reversing slider pressure plate 562. The screw sleeve 55 is fixedly installed on the outer side of one of the slider side plates 561.

[0032] Embodiment 2, by Figure 3 to Figure 4 It is shown that the structure of the bistable multi-way reversing valve of this embodiment is basically the same as the structure of the bistable multi-way reversing valve of the first embodiment, and the difference lies in that the number of the connecting pipes 52 is different.

[0033] like Figure 3-4 As shown, the connecting pipe 52 of the bistable multi-way reversing valve of this embodiment further includes a fourth connecting pipe 52C, and the fourth connecting pipe 52C is arranged side by side with the second connecting pipe 52E and the third connecting pipe 52S on the valve seat 58 .

[0034] The utility model provides a multi-way reversing valve with a new structure. The number of pipes 52 can be set according to actual needs to obtain a three-way valve or a four-way valve. The working principle of the multi-way reversing valve is as follows: after power is turned on, the composite coil 532 generates a magnetic field to drive the composite permanent magnet rotor 533 to rotate, realize the rotation of the screw drive shaft 54, drive the screw sleeve 55 to rotate along the screw drive shaft 54, drive the reversing slider 57 to slide along the valve seat 58, and at the same time, the movable frame 56 slides along the length direction of the valve cavity 510. Similarly, after the reverse current is input, the screw drive shaft 54 ​​can be reversed to reset.

[0035] The stepping motor 53 drives the movable frame 56 to move in the valve chamber 510, thereby realizing the reciprocating motion of the reversing slider 57. The advantages of the utility model over the prior art are: reversing can be performed without pressure difference, reducing the physical damage of the reversing slider 57, and the required connection position can be switched before the compressor is started. Therefore, there will be no problems such as incomplete reversal or even failure to reversal, resulting in air leakage, jamming, etc.

[0036] Embodiment 3, by Figure 5It is given that the present embodiment provides a refrigeration system, including a compressor 1, a condenser 2, an evaporator 3 and a four-way valve 5, the four-way valve 5 adopts the bistable multi-way reversing valve described in the above-mentioned embodiment 2, wherein the first connecting pipe 52D is connected to the exhaust port of the compressor 1, the third connecting pipe 52S is connected to the suction port of the compressor 1, the second connecting pipe 52E is connected to the outlet end of the evaporator 3, and the fourth connecting pipe 52C is connected to the inlet end of the condenser 2.

[0037] The refrigeration system further includes a throttling element 4. The outlet end of the condenser 2 is connected to the inlet end of the evaporator 3, and the throttling element 4 is arranged between the two.

[0038] Therefore, the refrigeration system of the utility model adopts the above-mentioned bistable multi-way reversing valve, has no cross-flow phenomenon, and has a low failure rate.

[0039] Embodiment 4, by Figure 6 It is given that the present embodiment provides an air-conditioning water heater system, including a compressor 1, a water heat exchanger 6, an outdoor heat exchanger 7, an indoor heat exchanger 8 and a four-way valve 5, the four-way valve 5 adopts the bistable multi-way reversing valve described in the above-mentioned embodiment 2, wherein: the first connecting pipe 52D is connected to the exhaust port of the compressor 1, the third connecting pipe 52S is connected to the intake port of the compressor 1, the second connecting pipe 52E is connected to the outlet end of the outdoor heat exchanger 7, the third connecting pipe 52S is connected to the outlet end of the indoor heat exchanger 8, the fourth connecting pipe 52C is connected to the inlet end of the water heat exchanger 6, and the outlet end of the water heat exchanger 6 is respectively connected to the inlet ends of the outdoor heat exchanger 7 and the indoor heat exchanger 8.

[0040] The air conditioning water heater system further includes a throttling element 4, which includes a first throttling element 4a and a second throttling element 4b. The first throttling element 4a is disposed at the outlet end of the water heat exchanger 6 and the inlet end of the outdoor heat exchanger 7, and the second throttling element 4b is disposed at the outlet end of the water heat exchanger 6 and the inlet end of the indoor heat exchanger 8. The first throttling element 4a and the second throttling element 4b may be electronic expansion valves or capillaries. If the first throttling element 4a and the second throttling element 4b are capillaries, an electromagnetic valve needs to be installed.

[0041] Therefore, the air-conditioning water heater system of the utility model adopts the above-mentioned bistable multi-way reversing valve, has no cross-flow phenomenon, and has a low failure rate.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bistable multi-way reversing valve, comprising a valve body having a valve cavity, wherein the valve body (51) is provided with a plurality of connecting pipes (52), characterized in that: The valve body (51) further comprises a stepper motor (53), a screw transmission shaft (54), a screw sleeve (55), a movable frame (56) and a reversing slider (57). The stepper motor (53) is mounted on one end of the valve body (51) and is dynamically connected to the screw transmission shaft (54). The movable frame (56) is movably mounted in the valve cavity (510). The reversing slider (57) is mounted on the movable frame (56). The screw sleeve (55) is fixedly connected to the movable frame (56) and movably sleeved on the outer periphery of the screw transmission shaft (54). Under the drive of the stepper motor (53), the reversing slider (57) can slide to one of the working positions to connect two of the multiple pipes (52) or slide to another working position to separate the two pipes (52).

2. The bistable multi-way reversing valve according to claim 1, characterized in that: It also includes a valve seat (58), the connecting pipe (52) includes a first connecting pipe (52D), a second connecting pipe (52E) and a third connecting pipe (52S), the first connecting pipe (52D) is always connected to the valve chamber (510), the second connecting pipe (52E) and the third connecting pipe (52S) are arranged on the valve seat (58), and the reversing slider (57) can move on the valve seat (58) to change the on-off state between the second connecting pipe (52E) and the third connecting pipe (52S).

3. The bistable multi-way reversing valve according to claim 2, characterized in that: The connecting pipe (52) further includes a fourth connecting pipe (52C), and the fourth connecting pipe (52C) ​​is arranged side by side with the second connecting pipe (52E) and the third connecting pipe (52S) on the valve seat (58).

4. The bistable multi-way reversing valve according to claim 1, characterized in that: The stepper motor (53) comprises a housing (531), a composite coil (532) and a composite permanent magnet rotor (533); the housing (531) is fixedly mounted on the end of the valve body (51); the composite permanent magnet rotor (533) is sleeved on an end of the screw transmission shaft (54) away from the screw sleeve (55) and is located in the housing (531); the composite coil (532) is mounted on the housing (531) and sleeved on the outer periphery of the composite permanent magnet rotor (533).

5. The bistable multi-way reversing valve according to claim 1, characterized in that: The movable frame (56) includes a slider side plate (561) and a reversing slider pressure plate (562), wherein the slider side plates (561) are a pair, wherein the pair of slider side plates (561) are vertically installed in the valve cavity (510) and are respectively located on both sides of the reversing slider (57), wherein both ends of the reversing slider pressure plate (562) are respectively connected to the pair of slider side plates (561), wherein the reversing slider (57) is fixedly installed on the reversing slider pressure plate (562), and the screw sleeve (55) is fixedly installed on the outer side of one of the slider side plates (561).

6. A refrigeration system, comprising a compressor (1), a condenser (2), an evaporator (3) and a four-way valve (5), characterized in that: The four-way valve (5) adopts the bistable multi-way reversing valve described in any one of claims 3 to 5, the first connecting pipe (52D) is connected to the exhaust port of the compressor (1), the third connecting pipe (52S) is connected to the intake port of the compressor (1), the second connecting pipe (52E) is connected to the outlet end of the evaporator (3), and the fourth connecting pipe (52C) ​​is connected to the inlet end of the condenser (2).

7. The refrigeration system according to claim 6, characterized in that: It also includes a throttling element (4); the outlet end of the condenser (2) is connected to the inlet end of the evaporator (3), and the throttling element (4) is arranged between the two.

8. An air conditioning water heater system, comprising a compressor (1), an outdoor heat exchanger (7), an indoor heat exchanger (8), a water heat exchanger (6) and a four-way valve (5), characterized in that: The four-way valve (5) adopts the bistable multi-way reversing valve described in any one of claims 3 to 5, the first connecting pipe (52D) is connected to the exhaust port of the compressor (1), the third connecting pipe (52S) is connected to the intake port of the compressor (1), the second connecting pipe (52E) is connected to the outlet end of the outdoor heat exchanger (7), the third connecting pipe (52S) is connected to the outlet end of the indoor heat exchanger (8), and the fourth connecting pipe (52C) ​​is connected to the inlet end of the water heat exchanger (6), and the outlet end of the water heat exchanger (6) is respectively connected to the inlet end of the outdoor heat exchanger (7) and the indoor heat exchanger (8).

9. The air conditioning water heater system according to claim 8, characterized in that: It also includes a throttling element (4), the throttling element (4) including a first throttling element (4a) and a second throttling element (4b), the first throttling element (4a) being arranged at the outlet end of the water heat exchanger (6) and the inlet end of the outdoor heat exchanger (7), and the second throttling element (4b) being arranged at the outlet end of the water heat exchanger (6) and the inlet end of the indoor heat exchanger.

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