Pre-cooling machine

Abstract

The invention relates to the technical field of fruit and vegetable precooling and fresh keeping, in particular to a precooler which comprises a vacuum chamber, a protective door, a vacuum pump, a filter chamber, an air blower, a fixing plate and a filter plate. The vacuum precooling device is arranged in the vacuum chamber so that fruits and vegetables in the vacuum chamber can be subjected to vacuum precooling subsequently, outside air is sucked into the filter plate through the air blower to be preliminarily filtered, and after being filtered, the air is conveyed into the filter chamber to be filtered again and disinfected and sterilized, so that the disinfected and sterilized air can be conveyed into the vacuum chamber; according to the pre-cooling machine, the back-pressure operation is carried out in the vacuum chamber, and the technical problem that when an existing pre-cooling machine finishes vacuum pre-cooling and fruits and vegetables need to be taken out, a back-pressure structure is not arranged, and when an operator directly opens the pre-cooling machine, too high negative pressure greatly affects the body health of the operator is solved.

Description

Technical Field

[0001] The invention relates to the technical field of precooling and fresh-keeping of fruits and vegetables, and in particular to a precooling machine. Background Art

[0002] At present, in order to ensure the freshness of fruits and vegetables during transportation, it is usually necessary to use a pre-cooling machine to pre-cool the fruits and vegetables. Most existing pre-cooling machines use vacuum pumps to create negative pressure, but the vacuum pump cannot directly suck away the water in the closed box, and the efficiency is low.

[0003] Prior art CN116907175 discloses an intelligent vacuum precooling machine, which uses a water pump ejector to achieve a vacuum negative pressure mode, can simultaneously absorb water vapor, and reduce the air pressure in the closed box to a negative pressure state. At the same time, the compressor hot air is used to heat the air pipe to prevent the water vapor in the air pipe from freezing. The compressor cools down and absorbs water, and the temperature is controlled between -25 and 25 degrees Celsius for precooling. Precooling under negative pressure has high efficiency and extremely low energy consumption.

[0004] However, when the vacuum precooling is finished and the fruits and vegetables need to be taken out, the precooling machine is not provided with a back pressure structure, so when the operator directly opens the precooling machine, the excessive negative pressure will have a great impact on the health of the operator. Summary of the invention

[0005] The purpose of the present invention is to provide a precooler, which solves the technical problem that when the vacuum precooling is completed and the fruits and vegetables need to be taken out, the existing precooler has no back pressure structure, resulting in excessive negative pressure that has a great impact on the health of the operator when the operator directly opens the precooler.

[0006] To achieve the above-mentioned purpose, the present invention provides a precooling machine, including a vacuum chamber and a protective door, wherein the protective door is movably connected to the vacuum chamber and is located outside the vacuum chamber, and also includes a vacuum pump, a filter chamber, a blower, a fixed plate and a filter plate, the vacuum pump and the vacuum chamber are connected through a first solenoid valve, the filter chamber and the vacuum chamber are connected through a second solenoid valve, a filter screen, an adsorption layer and a sterilization layer are disassembled and arranged in sequence from top to bottom in the filter chamber, the blower is connected to the filter chamber and is located on a side of the filter chamber away from the vacuum chamber, the fixed plate is fixedly arranged on the outside of the air inlet of the blower, and the filter plate is disassembled and arranged on the upper surface of the fixed plate.

[0007] Among them, the blower includes a shell, a drive motor and blades. The drive motor is arranged outside the shell, and the output shaft of the drive motor passes through the shell and extends into the shell. The blades are fixed on the outside of the output shaft of the drive motor and are located in the shell.

[0008] Wherein, a control motor and a rotating disk are arranged in the vacuum chamber. The control motor is arranged in the vacuum chamber. The rotating disk is connected to the output shaft of the control motor and is located on the upper surface of the control motor.

[0009] Wherein, the precooler further comprises a water replenishing mechanism, and the water replenishing mechanism is used to replenish water to the fruits and vegetables before taking them out.

[0010] Wherein, the water replenishing mechanism includes a water absorbing member, a connecting box and a nozzle, the water absorbing member is used to supply water to the connecting box, the connecting box is located in the vacuum chamber, and the nozzle is connected to the connecting box and is located on the lower surface of the connecting box.

[0011] Wherein, the water absorbing component includes an evaporator, a compressor and a condenser, the evaporator is arranged in the vacuum chamber, the compressor is connected with the evaporator and is located outside the vacuum chamber, and the condenser is connected with the compressor and is located on the side of the compressor away from the vacuum chamber.

[0012] Wherein, the water absorbing component also includes a storage box and a water pump, the storage box is connected to the condenser and is located on the upper surface outside the vacuum chamber, the water pump is connected to the storage box and the connecting box respectively, and the water pump is arranged on the upper surface outside the vacuum chamber.

[0013] A precooler of the present invention extracts the air in the vacuum chamber through the vacuum pump, thereby reducing the air pressure in the vacuum chamber to a negative pressure state, so as to facilitate the subsequent vacuum precooling of fruits and vegetables in the vacuum chamber, and sucks the outside air into the filter plate through the blower for preliminary filtration, and after filtration, transmits the air to the filter chamber for re-filtration and disinfection, so that the disinfected air can be transmitted into the vacuum chamber, realizing a back pressure operation to the inside of the vacuum chamber, solving the technical problem that the existing precooler has no back pressure structure when the vacuum precooling is completed and the fruits and vegetables need to be taken out, resulting in the operator directly opening the precooler and the excessive negative pressure having a great impact on the health of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0015] Figure 1 It is a schematic diagram of the overall structure of the precooler of the first embodiment of the present invention.

[0016] Figure 2 FIG. 1 is a schematic cross-sectional view of a driving motor according to a first embodiment of the present invention.

[0017] Figure 3 It is a cross-sectional schematic diagram along the buckle of the first embodiment of the present invention.

[0018] Figure 4 The first embodiment of the present invention Figure 3 Enlarged view of point A.

[0019] Figure 5 It is a structural schematic diagram of the water replenishment mechanism of the precooler according to the second embodiment of the present invention.

[0020] Figure 6 4 is a schematic cross-sectional view along the nozzle of the second embodiment of the present invention.

[0021] In the figure: 101-vacuum chamber, 102-protective door, 103-vacuum pump, 104-filter chamber, 105-fixed plate, 106-housing, 107-drive motor, 108-blade, 109-plate, 110-buckle, 111-card slot, 112-control motor, 113-rotating disk, 114-first solenoid valve, 115-second solenoid valve, 116-filter screen, 117-adsorption layer, 118-sterilization layer, 119-filter plate, 201-connection box, 202-nozzle, 203-evaporator, 204-compressor, 205-condenser, 206-storage box, 207-water pump. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0023] First embodiment:

[0024] See also Figures 1 to 4 ,in, Figure 1 is a schematic diagram of the overall structure of the precooler of the first embodiment of the present invention, Figure 2 is a cross-sectional schematic diagram along the driving motor 107 of the first embodiment of the present invention, Figure 3 is a cross-sectional schematic diagram along the buckle 110 of the first embodiment of the present invention, Figure 4 The first embodiment of the present invention Figure 3 The enlarged view of point A of the present invention provides a precooling machine, including a vacuum chamber 101, a protective door 102, a vacuum pump 103, a filter chamber 104, a blower, a fixing plate 105 and a filter plate 119, the blower includes a shell 106, a driving motor 107 and blades 108, the filter plate 119 includes a plate body 109 and a buckle 110, and a control motor 112 and a rotating disk 113 are arranged in the vacuum chamber 101.

[0025] In this embodiment, the present invention extracts the air in the vacuum chamber 101 through the vacuum pump 103, so that the air pressure inside the vacuum chamber 101 can be reduced to a negative pressure state, so as to facilitate the subsequent vacuum precooling of the fruits and vegetables in the vacuum chamber 101, and the outside air is sucked into the filter plate 119 by the blower for preliminary filtration, and after filtration, the air is transmitted to the filter chamber 104 for re-filtration and disinfection, so that the disinfected air can be transmitted to the vacuum chamber 101, and a back pressure operation is performed to the inside of the vacuum chamber 101, which solves the technical problem that when the existing precooling machine is finished with vacuum precooling and the fruits and vegetables need to be taken out, there is no back pressure structure, resulting in the operator directly opening the precooling machine. The negative pressure will have a great impact on the health of the operator.

[0026] The protective door 102 is movably connected to the vacuum chamber 101 and is located outside the vacuum chamber 101. The vacuum pump 103 is connected to the vacuum chamber 101 through a first solenoid valve 114. The filter chamber 104 is connected to the vacuum chamber 101 through a second solenoid valve 115. A filter screen 116, an adsorption layer 117 and a sterilization layer 118 are sequentially disassembled from top to bottom in the filter chamber 104. The blower is connected to the filter chamber 104 and is located on a side of the filter chamber 104 away from the vacuum chamber 101. The fixed plate 105 is fixed on the outside of the air inlet of the blower. The filter plate 119 is disassembled and arranged on the upper surface of the fixed plate 105. The door 102 is connected to the vacuum chamber 101 through a hinge, so that the protective door 102 can rotate outside the vacuum chamber 101, and then the protective door 102 can open or close the internal space of the vacuum chamber 101, so as to place fruit and vegetable materials in the vacuum chamber 101. The vacuum pump 103 is connected to the vacuum chamber 101 through the first electromagnetic valve 114. The first electromagnetic valve 114 is opened to connect the vacuum pump 103 to the vacuum chamber 101. When the vacuum pump 103 is started, the suction force generated at the output end of the vacuum pump 103 can gradually suck the air in the vacuum chamber 101 into the vacuum pump 103. By setting the first electromagnetic valve 114, the vacuum pump 103 can be connected to the vacuum chamber 101. The electromagnetic valve 114 can control the rate of air sucked from the vacuum chamber 101 into the vacuum pump 103. The filter chamber 104 is connected to the vacuum chamber 101 through the second electromagnetic valve 115. The second electromagnetic valve 115 is opened to connect the filter chamber 104 and the vacuum chamber 101, so that the air in the filter chamber 104 can be gradually transmitted to the vacuum chamber 101, and the back pressure operation is performed inside the vacuum chamber 101. By setting the second electromagnetic valve 115, the rate of air transmitted from the filter chamber 104 to the vacuum chamber 101 can be controlled. The filter net 116, the adsorption layer 117 and the sterilization layer 118 The impurities in the air entering the filter chamber 104 can be filtered again, the bacteria in the air can be adsorbed, and the air can be sterilized, thereby improving the air purification effect. The filter plate 119 has evenly distributed filter holes, and the filter holes of the filter plate 119 can filter impurities in the air, so that the filtered air can pass through the filter holes of the filter plate 119, and the filtered impurities can be retained on the filter plate 119. The filter plate 119 is removably arranged on the upper surface of the fixed plate 105, so that when the filter holes of the filter plate 119 are blocked, the filter plate 119 can be removed to clear the filter holes of the filter plate 119.

[0027] Secondly, the filter net 116, the adsorption layer 117 and the sterilization layer 118 all extend out of the filter chamber 104, so that the filter net 116, the adsorption layer 117 and the sterilization layer 118 can be pulled out of the slide groove of the filter chamber 104 during disassembly.

[0028] Again, the drive motor 107 is arranged outside the shell 106, and the output shaft of the drive motor 107 passes through the shell 106 and extends into the shell 106. The blades 108 are fixed on the outside of the output shaft of the drive motor 107 and are located in the shell 106. The output shaft of the drive motor 107 is connected to the blades 108 and drives the blades 108 to rotate in the shell 106 along the axis of the output shaft of the drive motor 107, so that the outside air can be gradually sucked into the shell 106.

[0029] Meanwhile, the fixing plate 105 has a slot 111 , and the buckle 110 is disposed on a side of the plate body 109 close to the fixing plate 105 and embedded in the slot 111 to achieve a snap connection between the buckle 110 and the slot 111 .

[0030] Finally, the control motor 112 is arranged in the vacuum chamber 101, the rotating disk 113 is connected to the output shaft of the control motor 112 and is located on the upper surface of the control motor 112, the output shaft of the control motor 112 is connected to the rotating disk 113, and drives the rotating disk 113 to rotate along the axis of the output shaft of the control motor 112 in the vacuum chamber 101.

[0031] When using a precooler of the present embodiment, the buckle 110 is embedded into the card slot 111, so that the plate body 109 is limited and fixed on the outside of the fixed plate 105, and the filter plate 119 is installed on the outside of the fixed plate 105. After that, the filter screen 116, the adsorption layer 117 and the sterilization and disinfection layer 118 are pushed into the corresponding slide grooves of the filter chamber 104 in turn. When the filter screen 116, the adsorption layer 117 and the sterilization and disinfection layer 118 can no longer be pushed, the filter screen 116, the adsorption layer 117 and the sterilization and disinfection layer 118 are installed in the filter chamber 104, and the installation of the filter screen 116, the adsorption layer 117 and the sterilization and disinfection layer 118 is achieved.

[0032] After the filter plate 119, the filter screen 116, the adsorption layer 117 and the sterilization layer 118 are installed, the protective door 102 is rotated outside the vacuum chamber 101 to open the inner space of the vacuum chamber 101, so that the fruit and vegetable materials can be placed on the rotating disk 113 in the vacuum chamber 101, and then the inner space of the vacuum chamber 101 is closed. When the vacuum chamber 101 is in a closed state, the first solenoid valve 114 is opened to connect the vacuum pump 103 with the vacuum chamber 101, so that when the vacuum pump 103 is started, the vacuum pump 103 is The suction force generated at the output end of 103 can gradually suck the air in the vacuum chamber 101 into the vacuum pump 103, so that the air pressure inside the vacuum chamber 101 can be reduced to a negative pressure state, so as to facilitate the subsequent vacuum pre-cooling of the fruit and vegetable materials in the vacuum chamber 101. While the fruits and vegetables are being vacuum pre-cooled, the control motor 112 is started, so that the power output by the output shaft of the control motor 112 drives the rotating disk 113 to rotate along the axis of the output shaft of the control motor 112 in the vacuum chamber 101, thereby accelerating the vacuum pre-cooling rate of the fruit and vegetable materials on the rotating disk 113.

[0033] When the vacuum precooling is finished and the fruits and vegetables need to be taken out, the second solenoid valve 115 is opened to connect the filter chamber 104 with the vacuum chamber 101, and the drive motor 107 is started, so that the power output by the output shaft of the drive motor 107 drives the blade 108 to rotate along the axis of the output shaft of the drive motor 107 in the housing 106, so that the outside air can be gradually sucked into the housing 106, and the initial filtration is performed at the filter plate 119, so that the impurities obtained by the filtration can be retained on the filter plate 119, and the filtered air can pass through the filter holes of the filter plate 119, enter the blower, and finally be transmitted from the blower To the filter chamber 104, when the air reaches the filter chamber 104, the air is filtered again for impurities in the air, adsorbed for bacteria in the air, and sterilized and disinfected at the filter mesh 116, the adsorption layer 117, and the sterilization and disinfection layer 118 in sequence, thereby improving the air purification effect. After the air is purified, the air will be gradually transmitted to the vacuum chamber 101 to realize the back pressure operation inside the vacuum chamber 101, so as to solve the technical problem that the existing precooler has no back pressure structure when the vacuum precooling is completed and the fruits and vegetables need to be taken out, resulting in the operator directly opening the precooler. When the negative pressure is too high, it will have a great impact on the health of the operator.

[0034] Second embodiment:

[0035] Based on the first embodiment, please refer to Figure 5 and Figure 6 , Figure 5 is a schematic structural diagram of a water replenishment mechanism of a precooler according to a second embodiment of the present invention, Figure 6 It is a cross-sectional schematic diagram along the nozzle 202 of the second embodiment of the present invention. The present invention provides a precooler which also includes a water replenishing mechanism, the water replenishing mechanism includes a water absorbing member, a connecting box 201 and a nozzle 202, and the water absorbing member includes an evaporator 203, a compressor 204, a condenser 205, a storage box 206 and a water pump 207.

[0036] In this embodiment, the water replenishing mechanism is located at a side of the vacuum chamber 101 away from the vacuum pump 103, and is used to replenish water to the fruits and vegetables before taking them out.

[0037] Among them, the water absorbing member is used to supply water to the connection box 201, the connection box 201 is located in the vacuum chamber 101, the nozzle 202 is connected to the connection box 201 and is located on the lower surface of the connection box 201, and a plurality of nozzles 202 are evenly distributed below the connection box 201, and each of the nozzles 202 is connected to the connection box 201, so that the water source in the connection box 201 can be transmitted to the nozzle 202 and finally sprayed out from the nozzle 202, so as to replenish water to the fruit and vegetable materials placed on the rotating disk 113.

[0038] Secondly, the evaporator 203 is arranged in the vacuum chamber 101, the compressor 204 is connected to the evaporator 203 and is located outside the vacuum chamber 101, the condenser 205 is connected to the compressor 204 and is located on the side of the compressor 204 away from the vacuum chamber 101, the evaporator 203, the compressor 204 and the condenser 205 are connected in sequence, so that the evaporator 203 can gradually absorb the water vapor in the vacuum chamber 101 into the compressor 204, and after being compressed in the compressor 204, it reaches the condenser 205 for condensation, and gradually condenses the water vapor into liquid water, thereby realizing the evaporation of water on the fruit and vegetable materials in the vacuum chamber 101.

[0039] Finally, the storage box 206 is connected to the condenser 205 and is located on the upper surface outside the vacuum chamber 101. The water pump 207 is connected to the storage box 206 and the connection box 201 respectively. The water pump 207 is arranged on the upper surface outside the vacuum chamber 101. The storage box 206 is connected to the condenser 205, so that the moisture on the fruit and vegetable materials in the vacuum chamber 101 can be transferred to the storage box 206 after evaporation and treatment, so as to realize the recycling of moisture. The storage box 206, the water pump 207 and the connection box 201 are connected in sequence, so that when the water pump 207 is started, the suction generated by the output end of the water pump 207 can transfer the water source stored in the storage box 206 to the connection box 201.

[0040] When a precooler of the present embodiment is used, when vacuum precooling fruit and vegetable materials, the evaporator 203 is started, so that the evaporator 203 can gradually absorb the water vapor in the vacuum chamber 101 into the compressor 204, and after being compressed in the compressor 204, it reaches the condenser 205 for condensation, and gradually condenses the water vapor into liquid water, thereby realizing the evaporation of water on the fruit and vegetable materials in the vacuum chamber 101. After the water vapor is condensed into liquid water, the liquid water can be transmitted to the storage box 206 to realize the recycling of water.

[0041] Before taking out the fruits and vegetables, the water pump 207 is started so that the suction force generated by the output end of the water pump can transfer the water source stored in the storage box 206 to the connecting box 201, and then gradually transfer it to the nozzle 202 through the connecting box 201, and finally spray it out from the nozzle 202, so as to replenish the fruit and vegetable materials placed on the rotating disk 113 with water. At the same time, the control motor 112 is started so that the power output by the output shaft of the control motor 112 drives the rotating disk 113 to rotate along the axis of the output shaft of the control motor 112 in the vacuum chamber 101, thereby driving the fruit and vegetable materials placed on the rotating disk 113 to rotate along the axis of the output shaft of the control motor 112, so as to realize all-round water replenishment for the fruit and vegetable materials placed on the rotating disk 113.

[0042] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A precooler, comprising a vacuum chamber and a protective door, wherein the protective door is movably connected to the vacuum chamber and is located outside the vacuum chamber, characterized in that: It also includes a vacuum pump, a filter chamber, a blower, a fixed plate and a filter plate, the vacuum pump and the vacuum chamber are connected through a first solenoid valve, the filter chamber and the vacuum chamber are connected through a second solenoid valve, a filter screen, an adsorption layer and a sterilization layer are disassembled and arranged in sequence from top to bottom in the filter chamber, the blower is connected to the filter chamber and is located on a side of the filter chamber away from the vacuum chamber, the fixed plate is fixedly arranged on the outside of the air inlet of the blower, and the filter plate is disassembled and arranged on the upper surface of the fixed plate.

2. The precooler according to claim 1, characterized in that: The blower includes a shell, a drive motor and blades. The drive motor is arranged outside the shell. The output shaft of the drive motor passes through the shell and extends into the shell. The blades are fixed on the outside of the output shaft of the drive motor and are located in the shell.

3. The precooler according to claim 1, characterized in that: A control motor and a rotating disk are arranged in the vacuum chamber. The control motor is arranged in the vacuum chamber. The rotating disk is connected to the output shaft of the control motor and is located on the upper surface of the control motor.

4. The precooler according to claim 3, characterized in that: The precooler also includes a water replenishing mechanism, which is used to replenish water to the fruits and vegetables before taking them out.

5. The precooler according to claim 4, characterized in that: The water replenishing mechanism comprises a water absorbing member, a connecting box and a nozzle. The water absorbing member is used to supply water to the connecting box. The connecting box is located in the vacuum chamber. The nozzle is connected to the connecting box and is located on the lower surface of the connecting box.

6. The precooler according to claim 5, characterized in that The water absorbing member comprises an evaporator, a compressor and a condenser. The evaporator is arranged in the vacuum chamber. The compressor is communicated with the evaporator and is located outside the vacuum chamber. The condenser is communicated with the compressor and is located on a side of the compressor away from the vacuum chamber.

7. The precooler according to claim 6, characterized in that The water absorbing member further comprises a storage box and a water pump, wherein the storage box is communicated with the condenser and is located on the upper surface outside the vacuum chamber, and the water pump is communicated with the storage box and the connection box respectively and is arranged on the upper surface outside the vacuum chamber.

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