Vacuum pump, refrigerator and application method thereof

Abstract

The invention relates to the technical field of vacuum pumps, and provides a vacuum pump, a refrigerator and an application method thereof.The vacuum pump comprises a motor and a pump body, and the motor is connected with the pump body; the pump body is provided with an exhaust hole, a confluence flow channel, a first air inlet hole, a cooling hole and a filtering chamber; the confluence flow channel is communicated with the exhaust hole, the first air inlet hole and the filtering chamber; the first air inlet and the cooling hole are provided with free ends; when the vacuum pump is in a first cooling state, the first air inlet is closed, and the cooling hole is communicated with the filtering chamber; and when the vacuum pump is in a second cooling state, the first air inlet hole and the cooling hole are communicated with the confluence runner. According to the vacuum pump, when heat dissipation is needed, cooling airflow can be directly input for cooling through the first air inlet hole and the confluence flow channel; when the humidity of the cooling air flow is high, the cooling air flow can flow through the filtering chamber to remove water and then flow through the working part to dissipate heat, so that the problem that the service life of the carbon plate is shortened due to the influence of high temperature and high humidity can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum pumps, and in particular to a vacuum pump, a refrigerator and an application method thereof. Background Art

[0002] A vacuum pump is a device used to evacuate a container to obtain a relative vacuum degree; it is widely used in various testing equipment and food preservation occasions. In the process of food preservation, by extracting the air in the package, a near-vacuum environment can be created, thereby slowing down the oxidation rate of the food and extending the shelf life of the food. Some existing refrigerators with vacuum preservation are equipped with a dedicated vacuum chamber or vacuum box, and then vacuumed with a vacuum pump to preserve the food.

[0003] The invention patent with the existing authorization announcement number CN113898584B discloses a vertical liquid ring vacuum pump, including a pump body, a motor and an impeller. The pump body is integrally formed with an intake chamber and a discharge chamber located at the upper part, and a compression chamber located at the lower part. An axial hole is provided between the intake chamber and the discharge chamber, and the axial hole is eccentrically arranged relative to the center of the compression chamber. The side of the pump body is provided with an intake interface connected to the intake chamber, a discharge interface connected to the discharge chamber and a liquid inlet interface. The inner top wall of the compression chamber is provided with an intake distribution hole connected to the intake chamber, a discharge distribution hole connected to the discharge chamber and a liquid inlet channel connected to the liquid inlet interface. The motor is installed on the upper side of the pump body, and the drive shaft extends downward into the axial hole and is sealed with the axial hole. The impeller is installed in the compression chamber and is transmission-connected to the drive shaft.

[0004] For example, the vacuum pump in the above technical solution needs to input water as the working fluid when working, but this wet vacuum pump needs to add water regularly, maintenance is not convenient, and the vacuum degree that can be created is low; during use, the noise of the wet vacuum pump is also high, which is not suitable for household appliances. Although dry vacuum pumps can solve the above problems, dry vacuum pumps mostly use carbon sheets as working parts. Affected by temperature, the wear of the carbon sheets will be greater, which will affect the service life; although some carbon sheets have excellent heat resistance and wear resistance, if the heat cannot be dissipated in time, especially when used in household appliances, the accumulated heat will affect the normal and safe operation of surrounding components. Therefore, how to achieve good heat dissipation is an effective measure to ensure the life of the carbon sheets and the safe operation of components. Summary of the invention

[0005] In view of this, the present invention proposes a vacuum pump, a refrigerator and an application method thereof which can effectively dissipate heat and are suitable for household appliances, so as to solve the problem that the service life of the existing vacuum pump is reduced due to high temperature.

[0006] The technical solution of the present invention is achieved in this way:

[0007] In one aspect, the present invention provides a vacuum pump, comprising a motor and a pump body, wherein:

[0008] The motor is connected to the pump body, and the motor is used to provide power;

[0009] The pump body is provided with an exhaust hole, a converging flow channel, a first air inlet hole, a cooling hole and a filter chamber;

[0010] The converging flow channel is connected with the exhaust hole, the first air inlet hole and the filter chamber;

[0011] The first air inlet hole and the cooling hole have free ends;

[0012] When the vacuum pump is in the first cooling state, the first air inlet hole is closed, and the cooling hole is connected to the filter chamber;

[0013] When the vacuum pump is in the second cooling state, the free end of the first air inlet hole is closed, the first air inlet hole and the cooling hole are both connected to the converging flow channel, and the cooling hole and the filter chamber are closed.

[0014] On the basis of the above technical solution, preferably, it further comprises a valve stem, and the pump body is provided with a connecting hole, wherein:

[0015] One end of the communication hole is connected to the first air inlet hole, and the other end is connected to the cooling hole;

[0016] The valve stem is threadedly connected to the pump body, one end of the valve stem blocks the communicating hole, and the other end extends to the outside of the pump body.

[0017] On the basis of the above technical solution, preferably, the pump body includes a pump casing, an end casing and an impeller, wherein:

[0018] The pump housing is connected to the motor and is provided with a working chamber and an exhaust chamber;

[0019] The main shaft of the motor extends into the working chamber and is connected to the impeller;

[0020] The exhaust chamber is connected to the peripheral surface of the working chamber and the exhaust hole;

[0021] The end shell is connected with the pump shell and is provided with a converging flow channel, a first air inlet hole, a cooling hole and a filter chamber. The converging flow channel is communicated with the end surface of the working chamber.

[0022] On the basis of the above technical solution, preferably, it also includes a filter element, a backing plate, a frame and a pipe plug, wherein:

[0023] The converging flow channel and the filter chamber are open structures on the side facing the pump casing;

[0024] The filter element is inserted into the filter chamber;

[0025] The backing plate is fitted to the end shell to seal the filter chamber, and the backing plate is provided with a first through hole corresponding to the converging flow channel;

[0026] The frame is arranged between the backing plate and the pump housing, and a second through hole is opened corresponding to the first through hole, and the second through hole is communicated with the end surface of the working chamber;

[0027] The pipe plug is arranged in the filter chamber and blocks the inner end of the cooling hole.

[0028] On the basis of the above technical solution, preferably, the frame includes a frame, an end plate, a first rib, a partition, a positioning frame and a ring plate, wherein:

[0029] The frame is connected to the pad and the pump casing;

[0030] The end plate is arranged on the inner side of the frame and connected to the frame through a plurality of first ribs and a plurality of partitions, and the second through hole is opened on the end plate;

[0031] The positioning frame is connected to the partition plate, and the positioning frame abuts against the pad plate;

[0032] The ring plate is connected to the end plate and plugged into the pump casing.

[0033] On the basis of the above technical solution, preferably, a plurality of cavities are formed on both sides of the partition, and the cavities are filled with sound insulation materials;

[0034] One of the first ribs is provided with a second air inlet hole, and the second air inlet hole is communicated with the second through hole.

[0035] On the basis of the above technical solution, preferably, the end shell includes a shell cover, a cylinder shell, a connecting block and a second rib, wherein:

[0036] One side of the shell is open;

[0037] The cylinder shell is arranged in the shell cover and has a converging flow channel;

[0038] The connecting block is connected with the shell cover and the cylinder shell, and is provided with a first air inlet hole and a cooling hole;

[0039] A plurality of second ribs are provided and connected with the shell cover, the cylinder shell and the connecting block to form a filter chamber.

[0040] On the basis of the above technical solution, preferably, the gasket includes a plate body, a sealing plate and a sealing ring, wherein:

[0041] The plate body is made of rigid material, and the sealing plate is embedded in the plate body and corresponds to the filter chamber;

[0042] The sealing plate is made of flexible material, is embedded in the plate body, and corresponds to the filter chamber;

[0043] The sealing ring is made of flexible material, is embedded in the plate body, and corresponds to the converging flow channel;

[0044] The sealing plate and the sealing ring protrude relative to the plate body, and the positioning frame protrudes relative to the frame.

[0045] On the other hand, the present invention provides a refrigerator, comprising the above-mentioned vacuum pump, wherein the first air inlet hole and / or cooling hole of the vacuum pump is connected to the refrigerating chamber of the refrigerator through a pipeline.

[0046] In another aspect, the present invention provides an application method of the above-mentioned vacuum pump, comprising the following steps:

[0047] S1. When vacuuming, select the appropriate working steps according to the application, including:

[0048] When the water content of food is low, the first air inlet is connected to the food package, the motor drives the pump body to work, the cooling hole is closed, the air flows in through the first air inlet, and is transported and discharged through the converging flow channel;

[0049] When the water content of food is high, the cooling hole is connected to the food package, the motor drives the pump body to work, the first air inlet hole is closed, the air enters through the cooling hole, flows through the filter chamber, and is then transported and discharged through the converging flow channel;

[0050] S2. When cooling, select the appropriate working steps according to the application, among which:

[0051] When the water content of the cooling airflow is high, the first air inlet is closed, and the cooling airflow is input into the cooling hole and filtered and dehydrated through the filter chamber, and then the cooling airflow is transported through the converging flow channel to flow through the working parts of the pump body for cooling;

[0052] When the water content of the cooling air flow is high or low, the cooling hole and the filter chamber are closed, the cooling air flow is input through the cooling hole and enters the first air inlet hole, and then the cooling air flow is transported through the converging flow channel to flow through the working parts of the pump body for cooling.

[0053] The vacuum pump, refrigerator and application method of the present invention have the following beneficial effects compared with the prior art:

[0054] (1) By connecting the first air inlet hole with the confluence flow channel, vacuuming can be performed. At the same time, a cooling hole is provided. The cooling hole is connected with the confluence flow channel through the filter chamber, and the cooling hole is also connected with the first air inlet hole. When the vacuum pump needs to dissipate heat, the cooling air flow can be directly input through the first air inlet hole and the confluence flow channel for cooling; when the humidity of the cooling air flow is high, the cooling air flow can flow through the filter chamber to remove water, and then flow through the working parts to dissipate heat, thereby avoiding the problem of the carbon sheet being affected by high temperature and high humidity and resulting in a reduced life span, and also avoiding heat accumulation affecting the normal operation of surrounding parts;

[0055] (2) The vacuum pump is provided with a valve stem, which is used to control the opening and closing of the connecting hole, so that the cooling airflow can be switched between the filter chamber and the first air inlet hole, and the air flow rate of the cooling airflow to the first air inlet hole can be adjusted, so as to be suitable for different working conditions and expand the application range; at the same time, the end of the valve stem extends to the outside of the pump body, which is convenient for operation and adjustment;

[0056] (3) The pump body is provided with a pump shell and an end shell, wherein one side of the end shell is provided with an open structure, so that the filter element can be inserted and installed. After the end shell is removed, the filter element can be directly removed and replaced, thereby improving the convenience of maintenance; wherein the cooling hole and the filter chamber are sealed by a pipe plug, and after the pipe plug is removed, the gas can flow to the cooling cavity. By removing the pump shell, this structure also facilitates the disassembly and adjustment of the pipe plug;

[0057] (4) A frame is provided between the pump housing and the end housing for connection, wherein the frame is provided with an end plate and a ring plate, which can be plugged and positioned with the pump housing by means of the ring plate, so that the end plate can block the end face of the working chamber of the pump housing, thereby ensuring a good sealing effect; multiple cavities are formed on both sides of the partition in the frame, which are convenient for filling with sound insulation materials to reduce the working noise of the impeller, making the vacuum pump more suitable for household appliances;

[0058] (5) A pad is provided between the end shell and the frame, and the plate body in the pad is made of a rigid material, and a sealing plate and a sealing ring made of a flexible material are embedded on the plate body, so that the filter chamber can be sealed by the sealing plate, and the periphery of the converging flow channel can be sealed by the sealing ring; at the same time, a relatively protruding positioning frame is provided on the frame corresponding to the filter chamber, which can abut against the sealing plate to limit the filter element, ensure that the filter element does not vibrate, and ensure the stability of operation;

[0059] (6) A second air inlet hole is provided on the mold frame, and the second air inlet hole is connected to the second through hole. In this way, when in use, the package can be vacuumed through the second air inlet hole, or a pressure sensor can be installed on the second air inlet hole to detect the air pressure, thereby realizing the operation status detection of the vacuum pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0061] Figure 1 is a perspective view of a vacuum pump of the present invention;

[0062] Figure 2 A front view of the vacuum pump of the present invention;

[0063] Figure 3 For the present invention Figure 2 Middle AA section view;

[0064] Figure 4 An exploded view of the vacuum pump of the present invention;

[0065] Figure 5 The figure is a diagram showing the internal structure of the end shell of the vacuum pump of the present invention;

[0066] Figure 6 A three-dimensional diagram of a backing plate of a vacuum pump of the present invention;

[0067] Figure 7 A three-dimensional diagram of a frame of a vacuum pump of the present invention;

[0068] Figure 8 A back perspective view of a frame of a vacuum pump of the present invention;

[0069] Fig. 9 The figure is a diagram showing the internal structure of a pump casing of a vacuum pump of the present invention;

[0070] In the figure: 1. motor; 2. pump body; 21. pump casing; 22. end shell; 221. shell cover; 222. cylinder shell; 223. connecting block; 224. second rib; 23. impeller; 201. exhaust hole; 202. converging flow channel; 203. first air inlet hole; 204. cooling hole; 205. filter chamber; 206. connecting hole; 207. working chamber; 208. exhaust chamber; 209. second air inlet hole; 3. valve stem; 4. filter element; 5. gasket; 51. plate body; 52. sealing plate; 53. sealing ring; 501. first through hole; 6. frame; 61. frame; 62. end plate; 63. first rib; 64. partition; 65. positioning frame; 66. ring plate; 601. second through hole; 602. cavity; 7. pipe plug. DETAILED DESCRIPTION

[0071] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0072] like Figures 1 to 9 As shown, the vacuum pump of the present invention comprises a motor 1, a pump body 2, a valve stem 3, a filter element 4, a backing plate 5, a frame 6 and a pipe plug 7.

[0073] like Figure 1 to Figure 4As shown, the motor 1 is connected to the pump body 2, and the motor 1 is used to provide power; the pump body 2 is provided with an exhaust hole 201, a confluence channel 202, a first air inlet hole 203, a cooling hole 204 and a filter chamber 205; the confluence channel 202 is connected with the exhaust hole 201, the first air inlet hole 203 and the filter chamber 205; the first air inlet hole 203 and the cooling hole 204 have free ends; when the vacuum pump is in the first cooling state, the first air inlet hole 203 is closed, and the cooling hole 204 is connected with the filter chamber 205; when the vacuum pump is in the second cooling state, the free end of the first air inlet hole 203 is closed, the first air inlet hole 203 and the cooling hole 204 are both connected with the confluence channel 202, and the cooling hole 204 is closed with the filter chamber 205;

[0074] As in the above structure, when the vacuum pump is working, it is connected to the food package through the first air inlet 203, so that when the motor 1 drives the pump body 2 to work, vacuuming can be achieved;

[0075] When the pump body 2 is working, the air flows into the converging flow channel 202 through the first air inlet 203, then flows through the working parts of the pump body 2, and then is discharged through the exhaust hole 201;

[0076] When the dry vacuum pump is working, the internal carbon sheet, as a rotating working part, will contact the outer shell of the pump body and generate heat due to friction, which will affect the service life. At the same time, if there are heat-sensitive components around, the heat will also affect these components, causing increased power consumption, so they need to be cooled;

[0077] Specifically, the first air inlet 203 and the cooling hole 204 are equipped with solenoid valves to realize on-off control. When heat dissipation is required, there are two operation modes:

[0078] First, when the water content of the cooling airflow is high, the vacuum pump is in the first cooling state, the first air inlet 203 is closed, and the cooling hole 204 is connected to the filter chamber 205; in this way, after the cooling airflow enters through the cooling hole 204, it will flow through the filter chamber 205, thereby filtering out the moisture in the airflow, and then the cooling airflow enters the converging flow channel 202, and then flows through the interior of the pump body 2, thereby achieving the cooling of the working parts;

[0079] Secondly, when the water content of the cooling air flow is low, the vacuum pump is in the second cooling state. At this time, the first air inlet 203 and the cooling hole 204 are both connected to the confluence channel 202, and the cooling hole 204 and the filter chamber 205 are closed; in this way, after the cooling air flow enters through the cooling hole 204, there is no need to filter the moisture, and it directly enters the confluence channel 202, and then flows through the interior of the pump body 2, thereby achieving cooling of the working parts.

[0080] In some embodiments, the vacuum pump is cooled synchronously while evacuating the vacuum;

[0081] Specifically, the first air inlet 203 is connected to the food package for gas extraction, and the cooling hole 204 and the filter chamber 205 are closed, and the cooling hole 204 is connected to the first air inlet 203, and the connecting section is smaller than the section of the first air inlet 203 to avoid affecting the vacuuming process;

[0082] Thus, when vacuuming, the cooling hole 204 will input a certain amount of cooling airflow to the first air inlet 203, so as to reduce the airflow temperature, and realize the cooling of the working parts of the pump body 2 while vacuuming;

[0083] In some embodiments, the cooling airflow may also enter the converging flow channel 202 through the filter chamber 205 , and the flow cross-sectional area of ​​the filter chamber 205 and the converging flow channel 202 is controlled to be smaller than the flow cross-sectional area of ​​the first air inlet 203 .

[0084] In some embodiments, the first air inlet 203 is closed, and the cooling hole 204 is used for vacuuming and dehumidification is performed simultaneously, which is suitable for occasions with short working time and no need for heat dissipation to ensure the working life of the carbon sheet.

[0085] like Figure 3 As shown, the pump body 2 is provided with a connecting hole 206, wherein one end of the connecting hole 206 is connected to the first air inlet hole 203, and the other end is connected to the cooling hole 204; the valve stem 3 is threadedly connected to the pump body 2, one end of the valve stem 3 blocks the connecting hole 206, and the other end extends to the outside of the pump body 2;

[0086] As in the above structure, the connecting hole 206 is used for the cooling airflow to flow from the cooling hole 204 to the first air inlet 203, and the valve stem 3 is used to control the opening and closing of the connecting hole 206, so that the airflow can be prevented from affecting the cooling hole 204 during vacuuming, and the supply flow of the cooling airflow can be adjusted to play the role of opening adjustment;

[0087] Since the valve stem 3 is connected to the pump body 2 by means of a thread, and one end thereof extends to the outside of the pump body 2, it is convenient to perform adjustment operations;

[0088] In some embodiments, the valve stem 3 is replaced by a solenoid valve, and the on-off control of the connecting hole 206 is achieved by means of the solenoid valve.

[0089] like Figure 3 , Figure 4 and Fig. 9As shown, the pump body 2 includes a pump casing 21, an end casing 22 and an impeller 23, wherein the pump casing 21 is connected to the motor 1 and is provided with a working chamber 207 and an exhaust chamber 208; the main shaft of the motor 1 extends into the working chamber 207 and is connected to the impeller 23; the exhaust chamber 208 is connected to the circumferential surface of the working chamber 207 and the exhaust hole 201; the end casing 22 is connected to the pump casing 21 and is provided with a converging flow channel 202, a first air inlet hole 203, a cooling hole 204 and a filter chamber 205, and the converging flow channel 202 is connected to the end surface of the working chamber 207.

[0090] As in the above structure, the working chamber 207 is used to accommodate the impeller 23, which is a working component. The impeller 23 is eccentrically mounted and has a plurality of inserted carbon sheets, so that when the impeller 23 rotates, the carbon sheets can drive the air flow to achieve vacuuming;

[0091] During operation, the airflow enters the working chamber 207 through the converging flow channel 202, and enters the exhaust chamber 208 driven by the carbon sheet, and then is discharged through the exhaust hole 201;

[0092] When the airflow enters the working chamber 207, the temperature in the working chamber 207 can be effectively reduced, thereby preventing the carbon sheet from being affected by high temperature and affecting its lifespan; at the same time, as the temperature decreases, heat accumulation can be avoided from affecting surrounding components, thereby ensuring a good surrounding environment.

[0093] like Figures 4 to 8 As shown, the converging flow channel 202 and the filter chamber 205 are open structures on one side facing the pump housing 21; the filter element 4 is inserted into the filter chamber 205; the backing plate 5 is attached to the end housing 22 to seal the filter chamber 205, and the backing plate 5 is provided with a first through hole 501 corresponding to the converging flow channel 202; the frame 6 is arranged between the backing plate 5 and the pump housing 21, and is provided with a second through hole 601 corresponding to the first through hole 501, and the second through hole 601 is communicated with the end surface of the working chamber 207; the pipe plug 7 is arranged in the filter chamber 205, and blocks the inner end of the cooling hole 204;

[0094] As in the above structure, the filter element 4 is used to filter dust and moisture, the pad 5 is used to close the open surface of the end shell 22, the frame 6 is used to connect the pad 5 and the pump shell 21 and seal the working chamber 207 of the pump shell 21, and the pipe plug 7 is used to control the communication between the cooling hole 204 and the filter chamber 205;

[0095] The backing plate 5 is provided with a first through hole 501, and the frame 6 is provided with a second through hole 601, so that when the gas circulates, the gas flows through the converging flow channel 202, the first through hole 501 and the second through hole 601 in sequence into the working chamber 207;

[0096] Among them, one side of the end shell 22 is open, which facilitates the disassembly and assembly of the filter element 4 and the pipe plug 7, and improves the convenience of maintenance;

[0097] When the cooling air flow needs to flow through the filter chamber 205 , the pipe plug 7 is removed; if the water content of the cooling air flow is low, the pipe plug 7 is installed to seal the cooling hole 204 and the filter chamber 205 , and the air flow enters the first air inlet 203 through the connecting hole 206 .

[0098] In some embodiments, an electromagnetic valve is used instead of the pipe plug 7. In this case, the connection between the cooling hole 204 and the filter chamber 205 can be controlled without removing the end shell 22. Considering that the electromagnetic valve is large in size, it will occupy the internal space of the filter chamber 205 and affect the gas circulation. Therefore, it is preferred to use the pipe plug 7 for sealing.

[0099] like Figure 7 and Figure 8 As shown, the frame 6 includes a frame 61, an end plate 62, a first rib 63, a partition 64, a positioning frame 65 and a ring plate 66, wherein the frame 61 is connected to the gasket 5 and the pump housing 21; the end plate 62 is arranged on the inner side of the frame 61, and is connected to the frame 61 through a plurality of first ribs 63 and a plurality of partitions 64, and a second through hole 601 is opened on the end plate 62; the positioning frame 65 is connected to the partition 64, and the positioning frame 65 abuts against the gasket 5; the ring plate 66 is connected to the end plate 62, and is plugged into the pump housing 21;

[0100] As in the above structure, when the frame 6 is assembled, it abuts against the pump housing 21 and is inserted into the pump housing 21 through the ring plate 66. In this way, the frame 6 can be positioned so that the end plate 62 blocks the end surface of the working chamber 207 and the second through hole 601 corresponds to the working chamber 207.

[0101] The plug-in structure of the ring plate 66 can further improve the sealing performance to ensure good working conditions;

[0102] In this structure, by providing a positioning frame 65, it can abut against the pad 5, ensure the installation structure of the filter element 4 is stable, avoid the filter element 4 shaking and causing gaps, and thus ensure its filtering effect;

[0103] The first ribs 63 and the partitions 64 are used for reinforcement.

[0104] like Figure 7 and Figure 8 As shown, a plurality of cavities 602 are formed on both sides of the partition 64, and the cavities 602 are filled with sound insulation materials; a second air inlet hole 209 is opened on one of the first ribs 63, and the second air inlet hole 209 is connected to the second through hole 601;

[0105] As in the above structure, the frame 6 not only connects the pad 5 and the pump housing 21, but also has a noise reduction effect; wherein the cavity 602 of the partition 64 is filled with sound insulation material, which can effectively reduce the noise generated by the operation of the impeller 23;

[0106] The frame 6 is also provided with a second air inlet 209. According to the application situation, the second air inlet 209 can be directly connected to the food packaging to perform a vacuum operation.

[0107] In some embodiments, the second air inlet 209 is used to install a pressure sensor to detect air pressure, thereby realizing the operation status detection of the vacuum pump.

[0108] like Figure 5 As shown, the end shell 22 includes a shell cover 221, a cylinder shell 222, a connecting block 223 and a second rib 224, wherein one side of the shell cover 221 is open; the cylinder shell 222 is arranged in the shell cover 221 and has a converging flow channel 202; the connecting block 223 is connected to the shell cover 221 and the cylinder shell 222 and has a first air inlet hole 203 and a cooling hole 204; a plurality of second ribs 224 are provided and are connected to the shell cover 221, the cylinder shell 222 and the connecting block 223 to form a filter chamber 205;

[0109] As in the above structure, the shell cover 221 plays a role of accommodation, and it can be set as an integrated structure with the internal cylinder shell 222, the connecting block 223 and the second rib 224, so that it is convenient to open the first air inlet 203, the cooling hole 204, and form the filter chamber 205;

[0110] The second ribs 224 are arranged corresponding to the first ribs 63 to ensure a stable structure after installation.

[0111] like Figure 6 As shown, the backing plate 5 includes a plate body 51, a sealing plate 52 and a sealing ring 53, wherein the plate body 51 is made of a rigid material, the sealing plate 52 is embedded in the plate body 51, and corresponds to the filter chamber 205; the sealing plate 52 is made of a flexible material, the sealing plate 52 is embedded in the plate body 51, and corresponds to the filter chamber 205; the sealing ring 53 is made of a flexible material, the sealing ring 53 is embedded in the plate body 51, and corresponds to the converging flow channel 202; the sealing plate 52 and the sealing ring 53 protrude relative to the plate body 51, and the positioning frame 65 protrudes relative to the frame 61;

[0112] As in the above structure, the gasket 5 is arranged between the end shell 22 and the frame 6. When sealing, since only the periphery of the filter chamber 205 and the periphery of the converging flow channel 202 need to be sealed, the plate body 51 is set to a rigid material to ensure the stability after the end shell 22 is connected to the frame 6, and the sealing plate 52 and the sealing ring 53 are set to a flexible material, specifically a rubber material, to ensure a good sealing effect;

[0113] The sealing plate 52 directly seals the open surface of the filter chamber 205, and the sealing ring 53 is used to seal the converging flow channel 202 and the periphery of the end surface of the second through hole 601 to ensure that the gas does not leak;

[0114] The sealing plate 52 and the sealing ring 53 are connected with the plate body 51 in an embedded manner, so that they can be disassembled and replaced separately when damaged, without replacing the main body of the backing plate 5;

[0115] The sealing plate 52 and the sealing ring 53 protrude relative to the plate body 51 , and the positioning frame 65 protrudes relative to the frame 61 , so that the positioning frame 65 can compress the sealing plate 52 and make the sealing plate 52 press against the filter element 4 to ensure the stable position of the filter element 4 .

[0116] The refrigerator of the present invention comprises the above-mentioned vacuum pump, and the first air inlet hole 203 and / or the cooling hole 204 of the vacuum pump are connected with the refrigerating chamber of the refrigerator through a pipeline;

[0117] As in the above structure, the first air inlet 203 is used to extract the gas in the refrigerator refrigeration chamber to achieve vacuum storage; the food box or food bag can also be placed in the refrigerator and connected to the first air inlet 203 through a pipeline to achieve vacuum extraction;

[0118] The cooling holes 204 are used to supply cooling airflow. In some cases, the cooling holes 204 are used to draw a vacuum.

[0119] The application method of the vacuum pump of the present invention comprises the following steps:

[0120] S1. When vacuuming, select the appropriate working steps according to the application, including:

[0121] When the water content of food is low, the first air inlet 203 is connected to the food package, the motor 1 drives the pump body 2 to work, the cooling hole 204 is closed, and the air flows in through the first air inlet 203, and is transported and discharged through the converging flow channel 202;

[0122] When the water content of food is high, the cooling hole 204 is connected to the food package, the motor 1 drives the pump body 2 to work, the first air inlet 203 is closed, the air enters through the cooling hole 204, flows through the filter chamber 205, and is then transported and discharged through the converging flow channel 202;

[0123] S2. When cooling, select the appropriate working steps according to the application.

[0124] When the water content of the cooling airflow is high, the first air inlet 203 is closed, and the cooling airflow is input through the cooling hole 204 and filtered and dehydrated through the filter chamber 205, and then the cooling airflow is transported through the converging flow channel 202 to flow through the working parts of the pump body 2 for cooling;

[0125] When the water content of the cooling air flow is high or low, the cooling hole 204 and the filter chamber 205 are closed, the cooling air flow is input through the cooling hole 204 and enters the first air inlet 203, and then the cooling air flow is transported through the converging flow channel 202 to flow through the working parts of the pump body 2 for cooling.

[0126] The vacuum pump of the present invention is particularly used in situations where a large amount of food needs to be vacuum packaged, such as a prepared food store;

[0127] Preferably, when a vacuum pump is provided, an inspection door is provided on the refrigerator corresponding to the vacuum pump to facilitate inspection and adjustment of the vacuum pump.

[0128] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vacuum pump, characterized in that: It comprises a motor (1) and a pump body (2), wherein: The motor (1) is connected to the pump body (2), and the motor (1) is used to provide power; The pump body (2) is provided with an exhaust hole (201), a converging flow channel (202), a first air inlet hole (203), a cooling hole (204) and a filter chamber (205); The converging flow channel (202) is in communication with the exhaust hole (201), the first air inlet hole (203) and the filter chamber (205); The first air inlet hole (203) and the cooling hole (204) have free ends; When the vacuum pump is in a first cooling state, the first air inlet hole (203) is closed, and the cooling hole (204) is in communication with the filter chamber (205); When the vacuum pump is in the second cooling state, the free end of the first air inlet hole (203) is closed, the first air inlet hole (203) and the cooling hole (204) are both connected to the converging flow channel (202), and the cooling hole (204) and the filter chamber (205) are closed.

2. The vacuum pump according to claim 1, characterized in that: It also includes a valve stem (3), the pump body (2) is provided with a communication hole (206), wherein: One end of the communication hole (206) is connected to the first air inlet hole (203), and the other end is connected to the cooling hole (204); The valve stem (3) is threadedly connected to the pump body (2); one end of the valve stem (3) blocks the connecting hole (206), and the other end extends to the outside of the pump body (2).

3. The vacuum pump according to claim 1, characterized in that: The pump body (2) comprises a pump casing (21), an end casing (22) and an impeller (23), wherein: The pump housing (21) is connected to the motor (1) and is provided with a working chamber (207) and an exhaust chamber (208); The main shaft of the motor (1) extends into the working chamber (207) and is connected to the impeller (23); The exhaust chamber (208) is in communication with the peripheral surface of the working chamber (207) and the exhaust hole (201); The end shell (22) is connected to the pump shell (21), and is provided with the converging flow channel (202), the first air inlet hole (203), the cooling hole (204) and the filter chamber (205); the converging flow channel (202) is in communication with the end surface of the working chamber (207).

4. The vacuum pump according to claim 3, characterized in that: It also includes a filter element (4), a backing plate (5), a frame (6) and a pipe plug (7), wherein: The converging flow channel (202) and the filter chamber (205) have an open structure on one side facing the pump housing (21); The filter element (4) is inserted into the filter chamber (205); The backing plate (5) is fitted to the end shell (22) to seal the filter chamber (205), and the backing plate (5) is provided with a first through hole (501) corresponding to the converging flow channel (202); The frame (6) is arranged between the backing plate (5) and the pump housing (21), and a second through hole (601) is opened corresponding to the first through hole (501), and the second through hole (601) is communicated with the end surface of the working chamber (207); The pipe plug (7) is arranged in the filter chamber (205) and blocks the inner end of the cooling hole (204).

5. The vacuum pump according to claim 4, characterized in that: The profile frame (6) comprises a frame (61), an end plate (62), a first rib (63), a partition plate (64), a positioning frame (65) and a ring plate (66), wherein: The frame (61) is connected to the backing plate (5) and the pump housing (21); The end plate (62) is arranged on the inner side of the frame (61), and is connected to the frame (61) through a plurality of the first ribs (63) and a plurality of the partitions (64); the second through hole (601) is opened on the end plate (62); The positioning frame (65) is connected to the partition plate (64), and the positioning frame (65) abuts against the pad plate (5); The ring plate (66) is connected to the end plate (62) and plugged into the pump housing (21).

6. The vacuum pump according to claim 5, characterized in that: A plurality of cavities (602) are formed on both sides of the partition (64), and the cavities (602) are filled with sound insulation material; One of the first ribs (63) is provided with a second air inlet hole (209), and the second air inlet hole (209) is connected to the second through hole (601).

7. The vacuum pump according to claim 5 or 6, characterized in that: The end shell (22) comprises a shell cover (221), a cylinder shell (222), a connecting block (223) and a second rib (224), wherein: One side of the shell cover (221) is open; The cylindrical shell (222) is arranged in the shell cover (221) and defines the converging flow channel (202); The connecting block (223) is connected to the shell cover (221) and the cylinder shell (222), and is provided with the first air inlet hole (203) and the cooling hole (204); A plurality of the second ribs (224) are provided, and are connected to the shell cover (221), the cylinder shell (222) and the connecting block (223) to form the filter chamber (205).

8. The vacuum pump according to claim 7, characterized in that: The gasket (5) comprises a plate body (51), a sealing plate (52) and a sealing ring (53), wherein: The plate body (51) is made of a rigid material, and the sealing plate (52) is embedded in the plate body (51) and corresponds to the filter chamber (205); The sealing plate (52) is made of a flexible material, and the sealing plate (52) is embedded in the plate body (51) and corresponds to the filter chamber (205); The sealing ring (53) is made of a flexible material, and the sealing ring (53) is embedded in the plate body (51) and corresponds to the converging flow channel (202); The sealing plate (52) and the sealing ring (53) protrude relative to the plate body (51), and the positioning frame (65) protrudes relative to the frame (61).

9. A refrigerator, characterized in that: It comprises the vacuum pump as claimed in any one of claims 1 to 8, wherein the first air inlet (203) and / or the cooling hole (204) of the vacuum pump is connected to the refrigerating chamber of the refrigerator through a pipeline.

10. A method for using the vacuum pump according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. When vacuuming, select appropriate working steps according to the application, including: When the water content of the food is low, the first air inlet (203) is connected to the food package, the motor (1) drives the pump body (2) to work, the cooling hole (204) is closed, and the air flow enters through the first air inlet (203), and is transported and discharged through the converging flow channel (202); When the water content of the food is high, the cooling hole (204) is connected to the food package, the motor (1) drives the pump body (2) to work, the first air inlet hole (203) is closed, the air enters through the cooling hole (204), flows through the filter chamber (205), and is then transported and discharged through the converging flow channel (202); S2. When cooling, select the appropriate working steps according to the application, among which: When the water content of the cooling airflow is high, the first air inlet (203) is closed, the cooling airflow is input into the cooling hole (204), filtered and dehydrated through the filter chamber (205), and then the cooling airflow is transported through the converging flow channel (202) to cool the working parts of the pump body (2); When the water content of the cooling airflow is high or low, the cooling hole (204) and the filter chamber (205) are closed, the cooling airflow is input through the cooling hole (204) and enters the first air inlet (203), and then the cooling airflow is transported through the converging flow channel (202) to flow through the working parts of the pump body (2) for cooling.

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