Fruit and vegetable dryer with air source heat pump

Abstract

The utility model particularly discloses an air source heat pump fruit and vegetable dryer which is characterized in that a curing barn comprises a drying cavity, a plurality of fruit and vegetable material racks are arranged in the drying cavity, and an air inlet and an air outlet which are used for being communicated with the drying cavity are formed in the curing barn; the dryer is arranged on one side of the curing barn and comprises a compressor, an evaporator, an evaporator fan and a condenser; a dehumidification fan is removed from the dehumidification system, the dehumidification principle of the dehumidification system is based on the pneumatic principle of a condensation circulating fan, a fresh air valve port is formed in an air suction part of the circulating fan, when a fresh air valve is opened, the fresh air valve can naturally suck air, the sucked air is naturally fed into the curing barn under the action of the condensation circulating fan, the pressure of the curing barn can naturally rise, and the air can be discharged out of the curing barn. And when the moisture removal air valve is also opened, the positive pressure in the curing barn naturally flows to the moisture removal air valve along with the moisture removal air duct and is discharged.

Description

Technical Field

[0001] The present application relates to the technical field of agricultural fruit and vegetable dehydration and drying equipment, and in particular to an air source heat pump fruit and vegetable dryer. Background Art

[0002] The existing air source heat pump fruit and vegetable drying machine includes an air source heat pump split fruit and vegetable drying machine, which can be divided into an air source heat pump main unit evaporator system according to actual conditions. The heat pump absorbed from the ambient air is sent to the condenser in the baking room through a connecting pipe. The heat of the condenser is continuously used by the condensing circulation fan to produce a hot and cold cycle with the fruits and vegetables. The fruits and vegetables continuously absorb heat and heat up, causing the moisture in the fruits and vegetables to evaporate into water vapor due to heat. Then, according to the requirements of process dehumidification, the wet steam in the baking room is discharged out of the baking room through the dehumidification fan installed on the baking room. With the change of process, the temperature in the baking room continues to rise, and the moisture in the fruits and vegetables is also reduced by steam. After reciprocating heating and dehumidification, the fruits and vegetables are gradually dehydrated and dried. The core is to heat and use the principle of the dehumidification fan to discharge the moisture in the baking room out of the baking room, which is also commonly known as: active dehumidification method. A fresh air louver damper is provided on the baking machine, which is synchronized with the dehumidification fan during dehumidification to ensure the pressure balance in the baking room.

[0003] However, it has the following disadvantages: 1. The connecting pipe has the risk of air leakage and there are after-sales costs; 2. A special dehumidification fan is arranged (additional cost); 3. Full heat recovery cannot be achieved, and it can only be used in places with limited drying space. Summary of the invention

[0004] In order to solve at least one of the technical problems existing in the background technology, the utility model adopts a solid reducer for the fourth axis, and the motor is directly connected to the reducer, which saves one stage of transmission, facilitates cable threading, and improves transmission reliability.

[0005] The present application provides an air source heat pump fruit and vegetable drying machine, comprising:

[0006] A drying room, the drying room comprising a drying cavity, a plurality of fruit and vegetable material racks are arranged in the drying cavity, and the drying room is provided with an air inlet and an air outlet for communicating with the drying cavity;

[0007] The dryer is arranged on one side of the drying room, and the dryer comprises a compressor, an evaporator, an evaporator fan and a condenser;

[0008] The heating chamber is arranged above the dryer, and a fresh air duct is arranged on the heating chamber. An auxiliary heating device and a high-temperature circulation fan are arranged inside the heating chamber, and the high-temperature circulation fan is located above the auxiliary heating device;

[0009] An electric control system is arranged on one side of the dryer, and the electric control system is electrically connected to and controls the compressor, evaporator, evaporator fan, condenser, auxiliary heating device and high-temperature circulation fan.

[0010] Preferably, a dehumidification air duct is provided at the air outlet, the dehumidification air duct is connected to the evaporator, and a dehumidification air valve is provided on the dehumidification air duct.

[0011] Preferably, a 4G module is further provided in the electric control system. After receiving instructions sent from the Internet or a mobile phone, the 4G module switches the heating, cooling or dehumidification mode through the electric control system.

[0012] Preferably, a four-way valve is provided between the compressor and the condenser, the four-way valve is connected to a gas-liquid separator, the outlet of the gas-liquid separator is connected to the return air end of the compressor, and a liquid reservoir and an electronic expansion valve are provided between the condenser and the evaporator.

[0013] Preferably, a double-opening baking room door is provided on the side of the baking room away from the dryer, and a transparent observation window is provided on the double-opening baking room door.

[0014] Preferably, a lower bell mouth for fixing the dryer is provided at the bottom of one end of the drying room, and the lower bell mouth is composed of two pieces, which are symmetrically arranged on both sides of the dryer.

[0015] Preferably, the auxiliary heating device comprises a plurality of heaters connected in parallel, each of the heaters being a ceramic thick film heating plate or a dry electric heating tube.

[0016] Preferably, each of the heaters is a heating box composed of ceramic thick film heating plates, and the heating box includes a plurality of support rods, and a plurality of ceramic thick film heating plates arranged in parallel are provided between two adjacent support rods.

[0017] Preferably, a connecting plate is provided at one end of the heating box body, and the connecting plate is fixed to the inner wall of the heating chamber through a triangular iron bracket.

[0018] Preferably, the heating chamber is also provided with a fan inspection port and a fan observation window, and the fan observation window is made of transparent material.

[0019] The beneficial effects brought by the present invention are:

[0020] First, the dehumidification system removes the dehumidification fan, which reduces the cost. The dehumidification principle is to borrow the pneumatic principle of the condensing circulation fan. A fresh air valve is set at the air suction of the circulation fan. When the fresh air valve is opened, it will naturally inhale air, and the inhaled air will be naturally sent into the baking room by the condensing circulation fan, and the pressure in the baking room will naturally increase. When the dehumidification valve is also opened, the positive pressure in the baking room will naturally flow to the dehumidification valve along the dehumidification air duct and be discharged;

[0021] Secondly, the core point is the dehumidification air duct. If there is no such air duct, the fresh air valve and the dehumidification air valve of the fresh air duct are set in the same heating chamber. Even if the two air valves are opened at the same time, the wind pressure in the baking room is also in a saturated state, that is, there is no inlet and no outlet. The dehumidification air duct of the utility model directly leads to the baking room, isolates the circulating air from the heating, forms a positive and negative air pressure difference, and thus the positive pressure wet steam in the baking room is naturally discharged along the dehumidification air duct;

[0022] Thirdly, through the 4G Internet of Things module, the current data is continuously sent to the background server through the telecommunications network. The background service transmits the data to each terminal (mobile phone or computer) after processing and analysis. The background computer will adjust and correct the current data after analysis (by experienced humans) to achieve the function of remote monitoring and correction. Each terminal mobile phone can monitor the current operating status in real time and realize remote user information processing.

[0023] These features and advantages of the present invention will be disclosed in detail in the following specific implementation manners and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of the present application are used to provide a further understanding of the present application, so that other features, purposes and characteristics of the present application become more obvious. The illustrative embodiment drawings and their descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application.

[0025] Figure 1 This is a schematic diagram of the end structure of an air source heat pump fruit and vegetable dryer provided in one embodiment of the present application.

[0026] Figure 2 This is a schematic diagram of the front structure of an air source heat pump fruit and vegetable dryer provided in one embodiment of the present application.

[0027] Figure 3 This is a schematic diagram of the overall structure of an air source heat pump fruit and vegetable dryer provided in one embodiment of the present application.

[0028] Figure 4 A schematic diagram of the structure of one side of a double-opening baking room door provided in one embodiment of the present application.

[0029] Figure 5 This is the principle diagram of the circulation wind direction of the air source heat pump fruit and vegetable dryer in this application.

[0030] Figure 6 It is a schematic diagram of the structure of the heating box in this application.

[0031] In the figure: a drying room 1; a fruit and vegetable material rack 11; a double-opening drying room door 12; a transparent observation window 13; a drying chamber 100; an air inlet 101; an air outlet 102; a dehumidification air duct 103; a dehumidification air valve 104; a dryer 2; a compressor 21; an evaporator 22; an evaporator fan 23; a condenser 24; a heating chamber 3; a fresh air duct 31; an auxiliary heating device 32; a heating box 321; a support rod 322; a ceramic thick film heating plate 323; a connecting plate 324; a triangular iron bracket 325; a high-temperature circulation fan 33; a fan inspection port 34; an electric control system 4; and a lower bell mouth 5. DETAILED DESCRIPTION

[0032] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Embodiment 1:

[0037] The utility model discloses an air source heat pump fruit and vegetable drying machine, which has the following technical features.

[0038] like Figure 1-6 As shown:

[0039] like Figure 1 Shown: An air source heat pump fruit and vegetable dryer with a drying chamber size of 8000×2700×4200mm.

[0040] The utility model mainly comprises a baking room 1, a drying machine 2 and a heating chamber 3. The heating chamber 3 is also provided with a fan inspection port 34 and a fan observation window. The fan observation window 34 is made of transparent material.

[0041] The baking room 1 includes a drying cavity 100, a plurality of fruit and vegetable material racks 11 are arranged in the drying cavity 100, and an air inlet 101 and an air outlet 102 for communicating with the drying cavity 100 are arranged on the baking room 1;

[0042] The dryer 2 is arranged at one side of the baking room 1, and the dryer 2 includes a compressor 21, an evaporator 22, an evaporator fan 23 and a condenser 24, and is used for cooling and heating.

[0043] The heating chamber 3 is arranged above the dryer 2. A fresh air duct 31 is provided on the heating chamber 3. The fresh air duct 31 is connected to the external natural air. A fresh air valve is provided in the fresh air duct 31. The angle and size of the valve are adjusted to control the incoming air flow.

[0044] The heating chamber 3 is provided with an auxiliary heating device 32 and a high-temperature circulation fan 33, and the high-temperature circulation fan 33 is located above the auxiliary heating device 32;

[0045] The electric control system 4 controls and adjusts the mode of the entire device. The electric control system 4 is arranged on one side of the dryer. The electric control system 4 is electrically connected to and controls the compressor 21, the evaporator 22, the evaporator fan 23, the condenser 24, the auxiliary heating device 32 and the high-temperature circulation fan 33.

[0046] A dehumidification air duct 103 is also provided at the air outlet 102 . The dehumidification air duct 103 is connected to the evaporator 22 . A dehumidification air valve 104 is provided on the dehumidification air duct 103 .

[0047] A four-way valve is provided between the compressor 21 and the condenser 24 , the four-way valve is connected to a gas-liquid separator, the outlet of the gas-liquid separator is connected to the return air end of the compressor, and a liquid reservoir and an electronic expansion valve are provided between the condenser 24 and the evaporator 22 .

[0048] A 4G module is also provided in the electric control system. After receiving instructions sent from the Internet or a mobile phone, the 4G module switches the heating, cooling or dehumidification mode through the electric control system 4.

[0049] Heating principle: first, the 4G module sends out the current mode instruction, the electronic control system outputs the signal, and the compressor works. After the electrical energy is converted into compression energy, it is connected to the inlet of the four-way valve through the system connecting pipeline. The normally open port of the four-way valve is connected to the inlet of the condenser, and the outlet of the condenser is connected to the inlet of the liquid reservoir. The outlet of the liquid reservoir is connected to the inlet of the electronic expansion valve, and the outlet of the electronic expansion valve is connected to the inlet branch of the evaporator. The outlet of the evaporator is connected to the normally closed port of the four-way valve, and the common port of the four-way valve is connected to the inlet of the gas-liquid separator. The outlet of the gas-liquid separator is connected to the return air port of the compressor. This connection forms a complete heating system.

[0050] Refrigeration principle: First, the 4G module sends out the current mode command, and the electronic control system outputs the signal to start the compressor to work. After the electrical energy is converted into compression energy, it is connected to the inlet of the four-way valve through the system connecting pipeline. At this time, the four-way valve is powered on due to the command, and the medium in the system will flow to the gas collecting pipe port of the external evaporator through the normally closed port. The evaporator is automatically converted into a condenser. Under the action of the operation of the evaporator fan, the high-pressure and low-temperature medium of the condenser flows from the outlet of the branch device to the electronic expansion valve for throttling and pressure reduction, and then enters the liquid storage tank and flows to the original condenser for refrigeration and evaporation. The original condenser is connected to the normally open port of the four-way valve, and the common port of the four-way valve is connected to the inlet of the gas-liquid separator. The outlet of the gas-liquid separator is then connected to the return air of the compressor, forming a complete refrigeration system.

[0051] Dehumidification principle: the heating chamber is equipped with a dehumidification air duct, a fresh air inlet valve, and a dehumidification air valve heating condenser. During dehumidification, the fresh air valve opens the fresh air valve angle according to the current dehumidification amount required by the 4G module and the controller. The fresh air valve is affected by the negative pressure of the circulating fan installed on the upper part of the heating chamber, and will naturally absorb the fresh air inhaled from the fresh air valve port. At this time, the natural pressure in the baking room rises. At the same time, the dehumidification air valve and the fresh air valve are opened synchronously. At this time, the positive pressure wet steam in the baking room will definitely be discharged from the dehumidification air duct, and discharged through the dehumidification air valve to the external evaporator. The evaporator will automatically be affected by the discharged wet steam and its capacity will naturally increase, that is, the C0P value will automatically increase. The above dehumidification forms form a complete dehumidification system.

[0052] The pneumatic principle of the circulating fan is that a fresh air valve is provided at the air suction of the circulating fan. When the fresh air valve is opened, it will naturally inhale air, and the inhaled air will be naturally sent into the baking room by the action of the condensing circulating fan, and the pressure of the baking room will naturally increase. When the dehumidification air valve is also opened, the positive pressure in the baking room will naturally flow to the dehumidification air valve along the dehumidification air duct and be discharged. The core point is the dehumidification air duct. If there is no such air duct, the fresh air valve and the dehumidification air valve are set on the same heating bin. Although the two air valves are opened at the same time, the wind pressure in the baking room must be in a saturated state, that is, a state of no inlet and no outlet. As mentioned above, the core is that the dehumidification air duct directly connects to the baking room, isolates the circulating air from the heating, and forms a positive and negative wind pressure difference, so that the positive pressure wet steam in the baking room is naturally discharged along the dehumidification air duct.

[0053] A double-opening baking room door 12 is provided on one side of the baking room 1 away from the dryer 2, and a transparent observation window 13 is provided on the double-opening baking room door 12. Through the transparent observation window 13, the overall condition of the vegetables inside can be observed without opening the double-opening baking room door 12, and the mode and power of the dryer can be adjusted.

[0054] A lower bell mouth 5 for fixing the dryer 2 is provided at the bottom of one end of the baking room 1 , and there are two lower bell mouths 5 symmetrically arranged on both sides of the dryer 2 .

[0055] The auxiliary heating device 32 includes a plurality of heaters connected in parallel, each of which is a ceramic thick film heating plate or a dry electric heating tube.

[0056] like Figure 2 and 6 As shown: In the present invention, the heater used is a heating box 321 composed of ceramic thick film heating plates, and the heating box 321 includes six support rods 322, and a plurality of ceramic thick film heating plates 323 arranged in parallel are provided between two adjacent support rods 322.

[0057] A connecting plate 324 is provided at one end of the heating box body 321 , and the connecting plate 324 is fixed to the inner wall of the heating chamber 3 through a triangular iron bracket 325 .

[0058] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An air source heat pump fruit and vegetable drying machine, characterized in that: include: A drying room (1), the drying room (1) comprising a drying cavity (100), a plurality of fruit and vegetable material racks (11) being arranged in the drying cavity (100), and an air inlet (101) and an air outlet (102) being arranged on the drying room (1) for communicating with the drying cavity (100); The dryer (2) is arranged on one side of the drying room (1), and the dryer (2) comprises a compressor (21), an evaporator (22), an evaporator fan (23) and a condenser (24); The heating chamber (3) is arranged above the drying machine (2), a fresh air duct (31) is arranged on the heating chamber (3), an auxiliary heating device (32) and a high-temperature circulation fan (33) are arranged inside the heating chamber (3), and the high-temperature circulation fan (33) is located above the auxiliary heating device (32); An electric control system (4), the electric control system (4) being arranged on one side of the dryer, the electric control system (4) being electrically connected to and controlling the compressor (21), the evaporator (22), the evaporator fan (23), the condenser (24), the auxiliary heating device (32) and the high-temperature circulation fan (33).

2. The air source heat pump fruit and vegetable drying machine according to claim 1, characterized in that: A dehumidification air duct (103) is also provided at the air outlet (102); the dehumidification air duct (103) is connected to the evaporator (22); and a dehumidification air valve (104) is provided on the dehumidification air duct (103).

3. The air source heat pump fruit and vegetable drying machine according to claim 2, characterized in that: The electric control system (4) is also provided with a 4G module, and after receiving instructions sent from the Internet or a mobile phone, the 4G module switches the heating, cooling or dehumidification mode through the electric control system (4).

4. The air source heat pump fruit and vegetable drying machine according to claim 3, characterized in that: A four-way valve is provided between the compressor (21) and the condenser (24), the four-way valve is connected to a gas-liquid separator, the outlet of the gas-liquid separator is connected to the return air end of the compressor, and a liquid storage device and an electronic expansion valve are provided between the condenser (24) and the evaporator (22).

5. The air source heat pump fruit and vegetable drying machine according to claim 1, characterized in that: A double-opening baking room door (12) is provided on the side of the baking room (1) away from the drying machine (2), and a transparent observation window (13) is provided on the double-opening baking room door (12).

6. The air source heat pump fruit and vegetable drying machine according to claim 5, characterized in that: A lower bell mouth (5) for fixing the dryer (2) is provided at the bottom of one end of the drying room (1), and the lower bell mouth (5) is composed of two pieces, which are symmetrically arranged on both sides of the dryer (2).

7. The air source heat pump fruit and vegetable drying machine according to claim 1, characterized in that: The auxiliary heating device (32) comprises a plurality of heaters connected in parallel, each of the heaters being a ceramic thick film heating sheet or a dry electric heating tube.

8. The air source heat pump fruit and vegetable drying machine according to claim 7, characterized in that: Each of the heaters is a heating box (321) composed of ceramic thick film heating plates, the heating box (321) comprises a plurality of support rods (322), and a plurality of ceramic thick film heating plates (323) arranged in parallel are provided between two adjacent support rods (322).

9. The air source heat pump fruit and vegetable drying machine according to claim 8, characterized in that: A connecting plate (324) is provided at one end of the heating box body (321), and the connecting plate (324) is fixed to the inner wall of the heating chamber (3) via a triangular iron bracket (325).

10. The air source heat pump fruit and vegetable drying machine according to claim 5, characterized in that The heating chamber (3) is also provided with a fan inspection port (34) and a fan observation window, and the fan observation window is made of transparent material.

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