Four-door fruit and vegetable dryer

Abstract

The utility model discloses a four-door fruit and vegetable drying machine, which belongs to the technical field of fruit and vegetable drying, and comprises a drying room, a sealing door for sealing the drying room, an air inlet positioned at the top of the drying room, an exhaust fan, a moisture removal fan behind the drying room and a heat pump system, the heat pump system comprises a control system, a compressor, a condenser, an evaporator and a heat recoverer, the compressor, the condenser and the evaporator are communicated through a pipeline, the pipeline is connected with a liquid storage tank in which a liquid refrigerant medium is stored, the exhaust fan can suck external air, the compressor sucks a gaseous refrigerant medium, the gaseous refrigerant medium is compressed into the gaseous refrigerant medium after the external temperature is absorbed through the evaporator, and the liquid refrigerant medium is stored in the liquid storage tank. According to the utility model, a thermodynamic cycle process of evaporation, compression, condensation, throttling and re-evaporation is completed through a refrigerant medium by virtue of a heat pump system, external low-grade heat is transferred into usable high-grade heat to continuously heat external air for drying and dehumidifying in a drying room, and preheating of the external air after drying and dehumidifying can be recycled; and the effect of saving energy and electricity is achieved.

Description

Technical Field

[0001] The utility model discloses a fruit and vegetable drying technology, in particular to a four-door fruit and vegetable drying machine. Background Art

[0002] Fruit and vegetable dryer, as the name suggests, is a device used to dry fruits and vegetables. It uses hot air to completely dry the fruits and vegetables that are stained with water after washing or are sliced, so that the fruit and vegetable slices are dried into crisp fruit and vegetable slices.

[0003] Fruit and vegetable dryers usually place washed or sliced ​​fruits and vegetables in a closed box and then dry them with hot air. Hot air is generally obtained by burning natural gas or heating in a boiler. The production process will produce additional exhaust gas, causing certain pollution. Therefore, a cleaner method is needed. Utility Model Content

[0004] The purpose of the utility model is to provide a four-door fruit and vegetable drying machine in order to solve the above-mentioned problems.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a four-door fruit and vegetable dryer, comprising a drying room, a sealed door for closing the drying room, an air inlet located at the top of the drying room, an exhaust fan, a dehumidification fan at the rear of the drying room and a heat pump system, wherein the heat pump system comprises a control system, a compressor, a condenser, an evaporator and a heat recovery device, wherein the compressor, the condenser and the evaporator are connected by a pipeline, and the pipeline is connected to a liquid storage tank for storing a liquid refrigerant, wherein the exhaust fan can draw in outside air, wherein the compressor draws in a gaseous refrigerant, absorbs the outside temperature through the evaporator and compresses it into a gaseous refrigerant, wherein the gaseous refrigerant releases heat to the drawn outside air through the condenser and the heat recovery device, and the outside air can circulate through the condenser for heat exchange and then enter the drying room.

[0006] Preferably, the heat recovery device is provided with a throttle valve and an expander, and the liquid refrigerant enters the expander through the throttle valve and then throttles to release heat.

[0007] Preferably, the condensers are arranged on the upper and lower layers of the heat recovery device respectively.

[0008] Preferably, the control system can control the circulation of outside air through the upper and lower layers of the condenser and the heat recovery device through the heat pump system. The control system is provided with a temperature sensor for detecting the heated outside air until the heated outside air reaches a preset temperature and enters the drying room.

[0009] Preferably, a plurality of heat dissipation holes are provided on both sides of the drying room, and the dehumidification fan can blow the hot and humid external air after drying to the heat dissipation holes for heat dissipation.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The refrigerant medium completes the thermal cycle of evaporation-compression-condensation-throttling-reevaporation through the heat pump system, and transfers the low-grade heat from the outside into usable high-grade heat to continuously heat the outside air used for drying and dehumidification in the drying room. It can also recycle the preheated outside air after drying and dehumidification, thus achieving the effect of energy saving and electricity saving, and does not generate pollutants such as exhaust gas. The drying and dehumidification process of the dryer is clean and pollution-free. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view of a four-door fruit and vegetable drying machine;

[0013] Figure 2 It is a rear view of a four-door fruit and vegetable drying machine;

[0014] Figure 3 It is a top view of a four-door fruit and vegetable drying machine;

[0015] Figure 4 It is a side view of a four-door fruit and vegetable drying machine;

[0016] Figure 5 This is a simplified diagram of the working process of the heat pump system.

[0017] Figure numerals: 1. drying room; 2. sealing door; 3. dehumidification fan; 4. control system; 5. air inlet; 6. heat dissipation hole. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] A four-door fruit and vegetable drying machine, such as Figure 1-Figure 4As shown, it includes a drying room 1, a sealed door 2 for closing the drying room 1, an air inlet 5 located on the top of the drying room 1, an exhaust fan, a dehumidification fan 3 at the rear of the drying room 1 and a heat pump system. The heat pump system includes a control system 4, a compressor, a condenser, an evaporator and a heat recovery device. The compressor, the condenser and the evaporator are connected by pipelines, and the pipelines are connected to a liquid storage tank for storing liquid refrigerant. The exhaust fan can suck outside air, and the compressor sucks the liquid refrigerant into the separator for gas-liquid separation, and then absorbs the outside temperature through the evaporator and is compressed into a gaseous refrigerant. The gaseous refrigerant releases heat to the sucked outside air through the condenser and the heat recovery device. The outside air can circulate through the condenser for heat exchange and then enter the drying room 1.

[0020] The control system 4 can control the outside air to circulate through the upper and lower layers of the condenser and exchange heat with the heat recovery device through the heat pump system. The control system 4 is provided with a temperature sensor for detecting the heated outside air until the heated outside air reaches a preset temperature and enters the drying room 1. When entering the drying room 1, the heated outside air flows from the heat pump system from the bottom to the top of the drying room 1, and is turned upside down during the drying time.

[0021] The heat recovery device is equipped with a throttle valve and an expander. The liquid refrigerant enters the expander through the throttle valve and throttles to release heat. The throttle valve and the expander are used to convert the high-temperature and high-pressure liquid refrigerant into a low-temperature and low-pressure liquid refrigerant, thereby further releasing heat.

[0022] The condenser is correspondingly arranged on the upper and lower layers of the heat recovery device. When the refrigerant medium releases heat, it surrounds the upper and lower layers of the heat recovery device, achieving two-stage heat release and high heating efficiency.

[0023] A plurality of heat dissipation holes 6 are provided on both sides of the drying room 1, and the dehumidifying fan 3 can blow the hot and humid outside air after drying to the heat dissipation holes 6 for heat dissipation;

[0024] like Figure 5 As shown, the working principle is as follows: the heat pump system is controlled by the control system 4, and the exhaust fan draws outside air from the air inlet 5. The refrigerant medium is changed from the initial low-temperature and low-pressure liquid to the low-temperature and low-pressure gas through the evaporator to absorb the outside heat. After the refrigerant medium passes through the compressor, it is changed from the low-temperature and low-pressure gas to the high-temperature and high-pressure gas. The heat recovery device and the condenser heat the drawn outside air during heat exchange. After the refrigerant releases heat, it is changed from the high-temperature and high-pressure gas to the high-temperature and high-pressure liquid. After further throttling and heat release through the throttle valve and the expander to become the low-temperature and low-pressure liquid, it returns to the evaporator for re-evaporation, and the thermal cycle is continued. The low-grade heat absorbed from the outside is transferred into the usable high-grade heat to dry and dehumidify the materials in the drying room 1.

[0025] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0026] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A four-door fruit and vegetable drying machine, characterized in that: The invention comprises a drying room (1), a sealed door (2) for closing the drying room (1), an air inlet (5) located at the top of the drying room (1), an exhaust fan, a dehumidification fan (3) at the rear of the drying room (1) and a heat pump system. The heat pump system comprises a control system (4), a compressor, a condenser, an evaporator and a heat recovery device. The compressor, the condenser and the evaporator are connected by a pipeline, and the pipeline is connected to a liquid storage tank storing a liquid refrigerant. The exhaust fan can suck in external air. The compressor sucks in the liquid refrigerant and separates it into gas and liquid through a separator. The liquid refrigerant is then compressed into a gaseous refrigerant after absorbing the external temperature through an evaporator. The gaseous refrigerant releases heat to the sucked external air through the condenser and the heat recovery device. The external air can circulate through the condenser for heat exchange and then enter the drying room (1).

2. A four-door fruit and vegetable drying machine according to claim 1, characterized in that: The heat recovery device is provided with a throttle valve and an expander, and the liquid refrigerant enters the expander through the throttle valve and then throttles to release heat.

3. A four-door fruit and vegetable drying machine according to claim 2, characterized in that: The condensers are correspondingly arranged on the upper and lower layers of the heat recovery device.

4. A four-door fruit and vegetable drying machine according to claim 3, characterized in that: The control system (4) can control the outside air to circulate through the upper and lower layers of the condenser and exchange heat with the heat recovery device through the heat pump system. The control system (4) is provided with a temperature sensor for detecting the heated outside air until the heated outside air reaches a preset temperature and enters the drying room (1).

5. A four-door fruit and vegetable drying machine according to any one of claims 1 to 4, characterized in that: A plurality of heat dissipation holes (6) are provided on both sides of the drying room (1), and the dehumidifying fan (3) can blow the hot and humid external air after drying to the heat dissipation holes (6) for heat dissipation.

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