Heat pump room system for dryer and dryer

Abstract

The utility model belongs to the technical field of drying, and particularly relates to a heat pump room system for a dryer and the dryer. According to the specific technical scheme, the heat pump comprises a heat pump box body and a heat exchange assembly, wherein the heat exchange assembly is arranged in the heat pump box body; the heat pump box body is provided with a dry and cold fresh air opening, the dry and cold fresh air opening is communicated with a cold end inlet of the heat exchange assembly through a pipeline, the heat exchange assembly directly conducts heat exchange on dry and cold fresh air sucked by the outside and high-humidity hot air recycled after drying, and dry and hot fresh air at a hot end outlet of the heat exchange assembly is used for drying materials. And low-humidity hot air at a cold end outlet of the heat exchange assembly is discharged into the heat pump box body. Therefore, the purposes of heating the dry and cold fresh air and reducing the temperature of the high-humidity hot air are achieved, the energy consumption required by heating the fresh air is reduced, and the purpose of saving energy is achieved. And meanwhile, the temperature in the heat pump box body is always kept above the lowest operation temperature of the heat pump, and the low-temperature-resistant working performance of the heat pump is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of drying, and in particular relates to a heat pump room system for a drying machine and a drying machine. Background Art

[0002] The gas coming out of the heat pump dryer for agricultural products has a certain humidity after drying. The existing heat pump dryer first mixes the high-temperature return air from the drying room with the fresh air, and then heats it through the heat pump device before entering the drying room; or first heats the high-temperature return air from the drying room through the heat pump device, and then mixes the heated high-temperature hot air with the fresh air, and the mixed hot air enters the drying room. Both types of heat pump dryers are equipped with dehumidification ports on the drying room to directly discharge the hot and humid gas to the outside. However, the hot and humid gas after drying still has a high temperature, and the heat of the hot and humid gas is not fully utilized, resulting in energy waste. The traditional heat pump dryer does not have a heat pump room system for recovering waste heat. When the ambient temperature is high, the existing heat pump room system works normally, but the energy consumption is high; when the ambient temperature is low, the heat pump is prone to frost and the heat pump cannot work normally. It is necessary to design an energy-saving and low-temperature resistant heat pump room system. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a heat pump room system for a dryer and a dryer.

[0004] To achieve the above-mentioned purpose of the invention, the technical solution adopted by the utility model is: a heat pump room system for a dryer, comprising a heat pump housing and a heat exchange component, wherein the heat exchange component is arranged in the heat pump housing; a dry and cold fresh air inlet is arranged on the heat pump housing, and the dry and cold fresh air inlet is connected with the cold end inlet of the heat exchange component through a pipeline, and the heat exchange component directly exchanges heat between the dry and cold fresh air inhaled from the outside and the high-humidity hot air recovered after drying, and the dry and hot fresh air at the hot end outlet of the heat exchange component is used for drying materials, and the low-humidity hot air at the cold end outlet of the heat exchange component is discharged into the heat pump housing.

[0005] Preferably, a heat pump main unit is arranged in the heat pump casing, and the gas in the heat pump casing enters the heat pump main unit to recover sensible heat and latent heat; an exhaust port and an air supply port are arranged on the heat pump casing, and the exhaust port corresponds to the exhaust fan of the heat pump main unit. The exhaust port discharges low-temperature humid air out of the heat pump casing, so that negative pressure is generated in the heat pump casing, and outside air is introduced into the heat pump casing through the air supply port through the negative pressure; when the external ambient temperature is low, the air supply port is closed and the opening of the exhaust port is reduced; as the external ambient temperature rises, the openings of the exhaust port and the air supply port are increased.

[0006] Preferably, an exhaust valve and a supply air valve are respectively arranged at the exhaust port and the supply air port, and the openings of the exhaust port and the supply air port are respectively adjusted by adjusting the openings of the exhaust valve and the supply air valve; the exhaust valve is arranged on the top of the heat pump housing and directly faces the exhaust fan, and the exhaust fan is separated from the exhaust valve;

[0007] And / or, the heat pump housing comprises a housing frame and a heat preservation plate, and a plurality of the heat preservation plates are arranged on the housing frame to enclose the heat pump housing.

[0008] Preferably, a fresh air duct is provided through one side wall of the heat pump housing, one end of the fresh air duct is connected to the hot end outlet of the heat exchange component, and the other end is connected to a fresh air fan;

[0009] And / or, a dehumidification air duct is provided through one side wall of the heat pump housing, one end of the dehumidification air duct is connected to the hot end inlet of the heat exchange component through an air supply pipe, and the other end is connected to a dehumidification fan.

[0010] Preferably, a plurality of heat exchange components and a heat pump main unit are arranged in the heat pump housing, and the plurality of heat exchange components and the heat pump main unit are arranged at intervals; a plurality of the dehumidification air ducts are staggered on both sides of the heat pump housing; and a plurality of the fresh air ducts are staggered on both sides of the heat pump housing.

[0011] Preferably, two heat exchange components are arranged between two adjacent heat pump main units, and the dehumidification pipe is connected to the hot end inlets of the two heat exchange components through an air supply pipe.

[0012] Correspondingly, a drying machine comprises a drying chamber and a static pressure box arranged on both sides of the drying chamber, the drying chamber and the static pressure box are separated by a drying chamber partition, and the upper and lower parts of the drying chamber partition are respectively provided with air inlet holes and air outlet holes for connecting the drying chamber and the static pressure box; a heat pump room system is arranged on the top or both sides of the drying chamber, the heat pump room system comprises a heat pump box body and a heat exchange component arranged in the heat pump box body, a dry cold fresh air inlet is arranged on the heat pump box body, the dry cold fresh air inlet is connected with the cold end inlet of the heat exchange component through a pipeline, the heat exchange component directly exchanges heat between the dry cold fresh air sucked in from the outside and the high-humidity hot air recovered from the lower part of the drying chamber, the dry hot fresh air at the hot end outlet of the heat exchange component enters the upper part of the static pressure box, and the low-humidity hot air at the cold end outlet of the heat exchange component is discharged into the heat pump box body; a heat pump condenser is arranged in the static pressure box, the heat pump condenser heats the high-temperature return air at the lower part of the drying chamber, the heated high-temperature hot air is mixed with the dry hot fresh air, and the mixed hot air is pressed into the drying chamber through the air inlet hole.

[0013] Preferably, a heat pump main unit is arranged in the heat pump casing, and the gas in the heat pump casing enters the heat pump main unit to recover sensible heat and latent heat; an exhaust valve and an air supply valve are arranged on the heat pump casing, and the exhaust valve discharges low-temperature humid air out of the heat pump casing, so that negative pressure is generated in the heat pump casing, and outside air is introduced into the heat pump casing through the air supply valve through the negative pressure; during operation, the opening of the exhaust valve and the air supply valve can be adjusted according to the external ambient temperature; the exhaust valve is arranged on the top of the heat pump casing and corresponds to the exhaust fan of the heat pump main unit.

[0014] Preferably, a circulating fan is provided in the static pressure box, and a horizontal partition is provided in the static pressure box, the horizontal partition divides the static pressure box into an upper part and a lower part of the static pressure box, the heat pump condenser and the circulating fan are arranged in the upper part of the static pressure box, the inlet of the heat pump condenser is connected to the lower part of the static pressure box, and the outlet of the heat pump condenser is connected to the inlet of the circulating fan.

[0015] Preferably, a fresh air duct is provided through one side wall of the heat pump housing, one end of the fresh air duct is connected to the hot end outlet of the heat exchange component, and the other end is connected to the upper part of the static pressure box through a fresh air fan;

[0016] And / or, a dehumidification air duct is provided through one side wall of the heat pump housing, one end of the dehumidification air duct is connected to the hot end inlet of the heat exchange component through an air supply pipe, and the other end is connected to the lower part of the drying chamber through a dehumidification fan, and an air regulating valve is provided on the dehumidification air duct.

[0017] The utility model has the following beneficial effects:

[0018] (1) By arranging a heat exchange component and a heat pump main unit in the heat pump housing, the heat exchange component exchanges heat between the dry cold fresh air inhaled from the outside and the high-humidity hot air after drying. The dry hot fresh air at the hot end outlet of the heat exchange component is used to dry the material, and the low-humidity hot air at the cold end outlet of the heat exchange component enters the heat pump housing. The gas in the heat pump housing enters the heat pump main unit to recover latent heat, so as to achieve the purpose of heating the dry cold fresh air and lowering the temperature of the high-humidity hot air, thereby reducing the energy consumption required for heating the fresh air (dry cold fresh air) and achieving the purpose of energy saving.

[0019] (2) By setting an exhaust valve and a make-up air valve on the heat pump housing, and adjusting the opening of the exhaust valve and the make-up air valve to generate negative pressure in the heat pump housing, the make-up air valve is opened to replenish the outside air into the heat pump housing due to the negative pressure in the heat pump housing, so that the heat pump host can absorb more heat. The exhaust valve and the make-up air valve are compared and calculated based on the temperature sensor and the set process parameters, and the valve opening is automatically adjusted to make the temperature in the heat pump housing always greater than the ambient temperature and greater than the normal temperature, so that the heat pump host can absorb more external heat and work at the maximum energy efficiency, so as to achieve the purpose of energy saving and low temperature resistance. At the same time, the temperature in the heat pump housing is always kept above the minimum operating temperature of the heat pump, so as to improve the heat pump's low temperature resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front view of the external structure of the dryer of the utility model;

[0021] Figure 2 It is a top view of the external structure of the drying machine of the utility model;

[0022] Figure 3 This is a front view of the internal structure of the dryer of the utility model;

[0023] Figure 4 It is a top view of the internal structure of the dryer of the utility model;

[0024] Figure 5 It is a side view of the internal structure of the drying machine of the utility model;

[0025] Figure 6 for Figure 4 A partial enlarged view of

[0026] Figure 7 It is a partial three-dimensional diagram of the drying machine of the utility model (the insulation board is not shown in the figure).

[0027] In the figure: static pressure box 1, drying chamber 2, heat pump condenser 3, heat exchange component 4, circulation fan 5, heat pump main unit 6, dehumidification fan 7, air regulating valve 8, dehumidification air duct 9, fresh air duct 10, fresh air fan 11, heat pump box body 12, exhaust valve 13, air supply valve 14, box body frame 15, insulation board 16, drying chamber partition 17, air inlet 18, air outlet 19, horizontal partition 20, dry and cold fresh air outlet 21, exhaust fan 22, air supply duct 23. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0029] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, 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.

[0030] It should be noted that Figure 1-Figure 4The dryer in the drawing does not show the loading structure.

[0031] like Figure 1-7 As shown, the utility model discloses a heat pump room system for a dryer, comprising a heat pump housing 12, a heat exchange component 4, and a heat pump host 6, wherein the heat exchange component 4 and the heat pump host 6 are arranged in the heat pump housing 12; a dry cold fresh air inlet 21 is arranged on the heat pump housing 12, and the dry cold fresh air inlet 21 is connected to the cold end inlet of the heat exchange component 4 through a pipeline, and the heat exchange component 4 directly exchanges heat between the dry cold fresh air inhaled from the outside and the high-humidity hot air recovered after drying, and the dry hot fresh air at the hot end outlet of the heat exchange component 4 is used for drying materials, and the low-humidity hot air at the cold end outlet of the heat exchange component 4 enters the heat pump housing 12.

[0032] Furthermore, the gas in the heat pump box 12 enters the heat pump main unit 6 to recover sensible heat and latent heat. The heat pump box 12 is provided with an exhaust port and an air supply port. The exhaust port corresponds to the exhaust fan 22 of the heat pump main unit 6. The exhaust port discharges low-temperature moisture out of the heat pump box 12, so that negative pressure is generated in the heat pump box 12, and outside air is introduced into the heat pump box 12 through the air supply port through the negative pressure. During operation, the opening of the exhaust port and the air supply port can be adjusted according to the external ambient temperature.

[0033] Specifically, an exhaust valve 13 and an air supply valve 14 are respectively provided at the exhaust port and the air supply port, and the openings of the exhaust valve 13 and the air supply valve 14 are respectively adjusted by adjusting the openings of the exhaust valve 13 and the air supply valve 14. The exhaust valve 13 and the air supply valve 14 are both used to connect the inside of the heat pump housing 12 with the outside world; the exhaust valve 13 corresponds to the exhaust fan 22 of the heat pump host 6, and the exhaust valve 13 discharges the low-temperature humid air at the outlet of the heat pump host 6 to the outside of the heat pump housing 12, so that negative pressure is generated in the heat pump housing 12, and the outside air is introduced into the heat pump housing 12 through the air supply valve 14 through the negative pressure. Here, the outside world refers to the outside of the heat pump housing 12. The exhaust valve 13 corresponds to the exhaust fan 22, which means that the purpose of discharging low-temperature humid air is achieved by the power of the exhaust fan 22 of the heat pump host 6. In a preferred embodiment, the exhaust valve 13 is directly opposite to the exhaust fan 22 of the heat pump host 6.

[0034] Furthermore, the heat exchange assembly 4 can be a heat exchanger combination of aluminum heat exchange cores, or can be other heat exchangers.

[0035] Furthermore, the exhaust valve 13 is arranged on the top of the heat pump housing 12, and the exhaust fan 22 is separated from the exhaust valve 13. Sufficient ventilation height is left between the top of the heat pump housing 12 and the top of the heat pump main unit 6. The exhaust valve 13 is directly facing the exhaust fan 22 of the heat pump main unit 6, and the purpose of exhaust is achieved through the power of the exhaust fan 22 of the heat pump main unit 6.

[0036] Furthermore, the heat pump housing 12 includes a housing frame 15 and a heat preservation board 16 , and a plurality of the heat preservation boards 16 are mounted on the housing frame 15 to enclose the heat pump housing 12 , so that the heat pump housing 12 has a heat preservation function.

[0037] Furthermore, a dry and cold fresh air inlet 21 is provided on the side wall of the heat pump case 12, and the dry and cold fresh air inlet 21 is connected to the cold end inlet of the heat exchange component 4 through a pipeline or other means; a fresh air duct 10 is provided through one side wall of the heat pump case 12, one end of the fresh air duct 10 extends into the interior of the heat pump case 12 and is connected to the hot end outlet of the heat exchange component 4, and the other end extends out of the heat pump case 12 and is connected to a fresh air fan 11, and the fresh air fan 11 directly delivers the dry hot fresh air into the drying chamber 2, or delivers it into the drying chamber 2 after mixing with the high-temperature hot air.

[0038] Furthermore, a dehumidification air duct 9 is provided through one side wall of the heat pump housing 12, one end of the dehumidification air duct 9 extends into the interior of the heat pump housing 12 to be connected to the supply air duct 23, the air outlet end of the supply air duct 23 is connected to the hot end inlet of the heat exchange component 4, and the other end extends out of the heat pump housing 12 to be connected to the dehumidification fan 7, and the dehumidification fan 7 delivers the high-humidity hot air coming out of the drying chamber 2 into the heat exchange component 4.

[0039] Furthermore, a plurality of heat exchange components 4 and a heat pump main unit 6 are arranged in the heat pump housing 12, and the plurality of heat exchange components 4 and the heat pump main unit 6 are arranged at intervals, and heat exchange components 4 are arranged on both sides of the heat pump main unit 6, and the low-humidity hot air at the cold end outlets of the corresponding two heat exchange components 4 enters one heat pump main unit 6 at the same time; a plurality of the dehumidification air ducts 9 are staggeredly arranged on both sides of the heat pump housing 12; and a plurality of the fresh air ducts 10 are staggeredly arranged on both sides of the heat pump housing 12.

[0040] Furthermore, two heat exchange components 4 are arranged between two adjacent heat pump main units 6 , and at this time, the dehumidification pipe is connected to the hot end inlets of the two heat exchange components 4 through an air supply pipe 23 .

[0041] The working principle of a heat pump room system for a dryer: the high-humidity hot air in the drying chamber 2 after drying the material still has a relatively high temperature. The high-humidity hot air enters the heat pump housing 12 through the dehumidification air duct 9 and enters the heat exchange component 4 from the hot end inlet of the heat exchange component 4. The dry cold fresh air inhaled from the outside enters the heat exchange component 4 from the cold end inlet of the heat exchange component 4. The high-humidity hot air exchanges heat with the dry cold fresh air entering from the fresh air port of the heat exchange component 4 extending outside the heat pump housing 12 in the heat exchange component 4, so as to achieve the purpose of heating the dry cold fresh air and reducing the temperature of the high-humidity hot air, thereby reducing the energy consumption required for heating the fresh air (dry cold fresh air) and achieving the purpose of energy saving. The dry hot fresh air at the hot end outlet of the heat exchange component 4 can directly enter the drying chamber 2 for drying, or it can be mixed with the high-temperature hot air heated by the heat pump condenser 3 and then enter the drying chamber 2 for drying.

[0042] The low-humidity hot air after heat exchange with the high-humidity hot air through the heat exchange component 4 is still higher than the ambient temperature (the lower the ambient temperature, the greater the difference between the two). At this time, the low-humidity hot air enters the heat pump main unit 6 again, and absorbs the sensible heat and latent heat in the air through the evaporator of the heat pump main unit 6. Because the low-humidity hot air after heat exchange with the heat exchange component 4 is more likely to reach the condensation point due to the drop in temperature, it generates more latent heat, thereby improving the energy efficiency of the heat pump.

[0043] The exhaust valve 13 is always in a certain opening state (not allowed to be closed) due to the need for dehumidification. The exhaust volume of the exhaust valve 13 when fully opened is much larger than the air volume delivered by the dehumidification fan 7 (i.e., much larger than the high-humidity hot air entering the heat exchange component 4). By controlling the opening of the exhaust valve 13, negative pressure is generated in the heat pump housing 12. After the air supply valve 14 is opened, the negative pressure in the heat pump housing 12 can be used to replenish the outside air into the heat pump housing 12, so that the heat pump host 6 can absorb more heat. Specifically, the exhaust valve 13 and the air supply valve 14 are both electric air valves, and their openings can be automatically adjusted according to the process requirements to achieve the purpose of energy saving and low temperature resistance of the heat pump room system. When the ambient temperature is low, the exhaust valve 13 and the make-up air valve 14 perform calculations and comparisons based on the temperature sensor and the set process parameters, and automatically reduce the valve opening. When the ambient temperature is particularly low, the make-up air valve 14 can even be completely closed. The opening of the exhaust valve 13 maintains the pressure balance in the heat pump housing 12 and always keeps the temperature in the heat pump room at an appropriate temperature. When the ambient temperature is high, the exhaust valve 13 and the make-up air valve 14 perform calculations and comparisons based on the temperature sensor and the set process parameters, and automatically increase the valve opening, so that the temperature in the heat pump housing 12 is always greater than the ambient temperature, allowing the heat pump host 6 to absorb more external heat and work at maximum energy efficiency, thereby achieving energy saving.

[0044] The present application also discloses a drying machine, such as Figure 1-7 As shown, it includes a drying chamber 2 and a static pressure box 1 arranged on both sides of the drying chamber 2, the drying chamber 2 and the static pressure box 1 are separated by a drying chamber partition 17, and the upper and lower parts of the drying chamber partition 17 are respectively provided with an air inlet 18 and an air outlet 19 for connecting the drying chamber 2 and the static pressure box 1; a heat pump room system is arranged on the top or both sides of the drying chamber 2, and the heat pump room system includes a heat pump box body 12 and a heat exchange component 4 arranged in the heat pump box body 12, and the heat pump box body 12 is provided with a dry cold fresh air inlet 21. The dry cold fresh air inlet 21 is connected to the cold end inlet of the heat exchange component 4 through a pipeline. The heat exchange component 4 directly exchanges heat between the dry cold fresh air inhaled from the outside and the high-humidity hot air recovered from the lower part of the drying chamber 2. The dry hot fresh air at the hot end outlet of the heat exchange component 4 is sent to the upper part of the static pressure box 1 through the fresh air fan 11; a heat pump condenser 3 is arranged in the static pressure box 1. The heat pump condenser 3 heats the high-temperature return air coming out of the lower part of the drying chamber 2 and mixes it with the dry hot fresh air. The mixed hot air is pressed into the drying chamber 2 through the air inlet 18.

[0045] Specifically, a horizontal partition 20 is provided in the static pressure box 1, and the horizontal partition 20 divides the static pressure box 1 into an upper part of the static pressure box 1 and a lower part of the static pressure box 1. The heat pump condenser 3 and the circulating fan 5 are arranged in the upper part of the static pressure box 1, and the inlet of the heat pump condenser 3 is connected with the lower part of the static pressure box 1, and the outlet of the heat pump condenser 3 is connected with the inlet of the circulating fan 5. The high-temperature return air at the bottom of the drying chamber 2 enters the lower part of the static pressure box 1 through the air outlet 19, and the high-temperature return air from the lower part of the drying chamber 2 is heated by the heat pump condenser 3 and then sent to the upper part of the static pressure box 1 through the circulating fan 5. The upper part of the static pressure box 1 mixes the dry hot fresh air with the heated high-temperature hot air and then presses it into the upper part of the drying chamber 2 through the air inlet 18 under positive pressure.

[0046] Furthermore, the heat pump room system also includes a heat pump host 6 arranged in a heat pump box 12, the low-humidity hot air at the cold end outlet of the heat exchange component 4 enters the heat pump box 12, and the gas in the heat pump box enters the heat pump host 6 to recover sensible heat and latent heat; the heat pump box 12 is provided with an exhaust valve 13 and an air supply valve 14, the exhaust valve 13 and the air supply valve 14 are both used to connect the heat pump box 12 with the outside world, the exhaust valve 13 discharges low-temperature moisture from the heat pump box 12, so that negative pressure is generated in the heat pump box 12; the exhaust valve 13 is arranged on the top of the heat pump box 12 and corresponds to the exhaust fan 22 of the heat pump host 6, and the exhaust fan 22 is separated from the exhaust valve 13.

[0047] The exhaust valve 13 corresponds to the exhaust fan 22, which means that the purpose of exhausting low-temperature moisture is achieved by the power of the exhaust fan 22 of the heat pump main unit 6. In a preferred embodiment, the exhaust valve 13 is directly opposite to the exhaust fan 22 of the heat pump main unit 6. The exhaust fan 22 is separated from the exhaust valve 13, which means that there is enough ventilation height between the top of the heat pump box 12 and the top of the heat pump main unit 6.

[0048] Furthermore, a dry and cold fresh air inlet 21 is provided on the side wall of the heat pump case 12, and the dry and cold fresh air inlet 21 is connected to the cold end inlet of the heat exchange component 4 through a pipeline or other means; a fresh air duct 10 is provided through one side wall of the heat pump case 12, one end of the fresh air duct 10 extends into the interior of the heat pump case 12 and is connected to the hot end outlet of the heat exchange component 4, and the other end extends out of the heat pump case 12 and is connected to the fresh air fan 11. The fresh air fan 11 sends the dry hot fresh air into the upper part of the static pressure box 1 to mix with the high-temperature hot air, and then sends it into the drying chamber 2 through the air inlet 18.

[0049] Furthermore, a dehumidification air duct 9 is provided through one side wall of the heat pump housing 12, one end of the dehumidification air duct 9 extends into the heat pump housing 12 and is connected to the hot end entrance of the heat exchange component 4 through the air supply pipe 23, and the other end is connected to the lower part of the drying chamber 2 through the dehumidification fan 7, and an air regulating valve 8 is provided on the dehumidification air duct 9. The air regulating valve 8 is provided to adjust the flow rate of high-humidity hot air entering the heat pump housing 12. The dehumidification fan 7 delivers the high-humidity hot air from the drying chamber 2 into the heat exchange component 4.

[0050] Furthermore, the heat pump room system is arranged on the top of the drying room 2; the heat pump box 12 includes a box frame 15 and an insulation board 16, and a plurality of the insulation boards 16 are arranged on the box frame 15 to enclose the heat pump box 12, and the bottom plate of the heat pump box 12 is the insulation board 16 on the top of the drying room 2, so that the heat pump box 12 has an insulation function.

[0051] Working principle of a dryer: The heat source of the dryer is a heat pump, wherein the heat pump condenser is arranged in a static pressure box. The high-temperature return air after drying in the drying chamber 2 enters the lower part of the static pressure box 1 through the air outlet 19, then enters the heat pump condenser 3 for heating, and is sent to the upper part of the static pressure box 1 through the circulating fan 5. The high-temperature hot air heated by the heat pump condenser 3 and the dry cold fresh air after heat exchange by the heat exchange component 4 are mixed in the upper part of the static pressure box 1, and the mixed high-temperature hot air is positively pressed into the upper part of the drying chamber 2 through the air inlet 18;

[0052] The high-humidity hot air in the lower part of the drying chamber 2 is sent into the heat pump box 12 through the dehumidification air duct 9 and the dehumidification fan 7. The high-humidity hot air is heat-exchanged with the dry cold fresh air entering from the dry cold fresh air port connected to the cold end inlet of the heat exchange component 4 in the heat exchange component 4, so as to achieve the purpose of heating the dry cold fresh air and reducing the temperature of the high-humidity hot air, thereby reducing the energy consumption required for heating the fresh air (dry cold fresh air) and achieving the purpose of energy saving. The dry hot fresh air at the hot end outlet of the heat exchange component 4 and the high-temperature hot air heated by the heat pump condenser 3 are mixed at the upper part of the static pressure box 1 and then sent to the drying chamber 2.

[0053] The low-humidity hot air at the cold end outlet of the heat exchange component 4 enters the heat pump housing 12, and the gas in the heat pump housing 12 enters the heat pump main unit 6, and absorbs the sensible heat and latent heat in the air through the evaporator of the heat pump main unit 6. Because the low-humidity hot air after heat exchange with the heat exchange component 4 is more likely to reach the condensation point due to the drop in temperature, it generates more latent heat, thereby improving the energy efficiency of the heat pump.

[0054] The exhaust valve 13 is always in a certain opening state due to the need for dehumidification. The exhaust volume when the exhaust valve 13 is fully opened is much larger than the air volume delivered by the dehumidification fan 7. By controlling the opening of the exhaust valve 13, negative pressure is generated in the heat pump housing 12. After the air supply valve 14 is opened, the negative pressure in the heat pump housing 12 can be used to replenish the outside air into the heat pump housing 12, so that the heat pump host 6 can absorb more heat. Specifically, the exhaust valve 13 and the air supply valve 14 are both electric air valves, and their openings can be automatically adjusted according to process requirements to achieve energy saving and low temperature resistance of the heat pump room system. When the ambient temperature is low, the exhaust valve 13 and the make-up air valve 14 perform calculations and comparisons based on the temperature sensor and the set process parameters, and automatically reduce the valve opening. When the ambient temperature is particularly low, the make-up air valve 14 can even be completely closed. The opening of the exhaust valve 13 maintains the pressure balance in the heat pump housing 12 and always keeps the temperature in the heat pump room at an appropriate temperature. When the ambient temperature is high, the exhaust valve 13 and the make-up air valve 14 perform calculations and comparisons based on the temperature sensor and the set process parameters, and automatically increase the valve opening, so that the temperature in the heat pump housing 12 is always greater than the ambient temperature, allowing the heat pump host 6 to absorb more external heat and work at maximum energy efficiency, thereby achieving energy saving.

[0055] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations, modifications, and substitutions made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A heat pump room system for a dryer, characterized in that: The invention comprises a heat pump housing (12) and a heat exchange component (4), wherein the heat exchange component (4) is arranged in the heat pump housing (12); a dry cold fresh air inlet (21) is arranged on the heat pump housing (12), and the dry cold fresh air inlet (21) is connected to the cold end inlet of the heat exchange component (4) through a pipeline; the heat exchange component (4) directly exchanges heat between the dry cold fresh air sucked in from the outside and the high-humidity hot air recovered after drying; the dry hot fresh air at the hot end outlet of the heat exchange component (4) is used for drying materials, and the low-humidity hot air at the cold end outlet of the heat exchange component (4) is discharged into the heat pump housing (12).

2. A heat pump room system for a dryer according to claim 1, characterized in that: A heat pump main unit (6) is arranged in the heat pump housing (12), and the gas in the heat pump housing (12) enters the heat pump main unit (6) to recover sensible heat and latent heat; an exhaust port and an air supply port are arranged on the heat pump housing (12), and the exhaust port corresponds to the exhaust fan (22) of the heat pump main unit (6). The exhaust port discharges low-temperature humid air out of the heat pump housing (12), so that negative pressure is generated in the heat pump housing (12), and outside air is introduced into the heat pump housing (12) through the air supply port through the negative pressure; when the outside environment temperature is low, the air supply port is closed and the opening of the exhaust port is reduced; as the outside environment temperature rises, the opening of the exhaust port and the air supply port is increased.

3. A heat pump room system for a dryer according to claim 2, characterized in that: An exhaust valve (13) and an air supply valve (14) are respectively arranged at the exhaust port and the air supply port, and the openings of the exhaust port and the air supply port are respectively adjusted by adjusting the openings of the exhaust valve (13) and the air supply valve (14); the exhaust valve (13) is arranged at the top of the heat pump housing (12) and directly faces the exhaust fan (22), and the exhaust fan (22) is separated from the exhaust valve (13); And / or, the heat pump housing (12) comprises a housing frame (15) and a heat insulation board (16), and a plurality of the heat insulation boards (16) are arranged on the housing frame (15) to enclose the heat pump housing (12).

4. A heat pump room system for a dryer according to claim 1, characterized in that: A fresh air duct (10) is provided through one side wall of the heat pump housing (12); one end of the fresh air duct (10) is connected to the hot end outlet of the heat exchange component (4), and the other end is connected to a fresh air fan (11); And / or, a dehumidification air duct (9) is provided through one side wall of the heat pump housing (12), one end of the dehumidification air duct (9) is connected to the hot end inlet of the heat exchange component (4) through an air supply pipe (23), and the other end is connected to a dehumidification fan (7).

5. A heat pump room system for a dryer according to any one of claims 2 to 4, characterized in that: A plurality of heat exchange components (4) and a heat pump main unit (6) are arranged in the heat pump housing (12), and the plurality of heat exchange components (4) and the heat pump main unit (6) are arranged at intervals; a plurality of dehumidification ducts (9) are arranged alternately on both sides of the heat pump housing (12); and a plurality of fresh air ducts (10) are arranged alternately on both sides of the heat pump housing (12).

6. A heat pump room system for a dryer according to claim 5, characterized in that: Two heat exchange components (4) are arranged between two adjacent heat pump main units (6), and the dehumidification air duct (9) is connected to the hot end inlets of the two heat exchange components (4) via an air supply pipe (23).

7. A drying machine, characterized in that: The invention relates to a drying chamber (2) and a static pressure box (1) arranged on both sides of the drying chamber (2); the drying chamber (2) and the static pressure box (1) are separated by a drying chamber partition (17); the upper and lower parts of the drying chamber partition (17) are respectively provided with an air inlet (18) and an air outlet (19) for connecting the drying chamber and the static pressure box; a heat pump room system is arranged on the top or both sides of the drying chamber (2); the heat pump room system comprises a heat pump box body (12) and a heat exchange component (4) arranged in the heat pump box body (12); the heat pump box body (12) is provided with a dry cold fresh air inlet (21); the dry cold fresh air inlet (21) is connected to the heat pump box body (12); The cold end inlet of the exchange component (4) is connected through a pipeline, and the heat exchange component (4) directly exchanges heat between the dry cold fresh air sucked in from the outside and the high-humidity hot air recovered from the lower part of the drying chamber (2). The dry hot fresh air at the hot end outlet of the heat exchange component (4) enters the upper part of the static pressure box (1), and the low-humidity hot air at the cold end outlet of the heat exchange component (4) is discharged into the heat pump box (12); a heat pump condenser (3) is arranged in the static pressure box (1), and the heat pump condenser (3) heats the high-temperature return air from the lower part of the drying chamber (2), and the heated high-temperature hot air is mixed with the dry hot fresh air, and the mixed hot air is pressed into the drying chamber (2) through the air inlet hole (18).

8. A drying machine according to claim 7, characterized in that: A heat pump main unit (6) is arranged in the heat pump housing (12), and the gas in the heat pump housing (12) enters the heat pump main unit (6) to recover sensible heat and latent heat; an exhaust valve (13) and an air supply valve (14) are arranged on the heat pump housing (12), and the exhaust valve (13) discharges low-temperature humid air out of the heat pump housing (12), so that negative pressure is generated in the heat pump housing (12), and outside air is introduced into the heat pump housing (12) through the air supply valve (14) through the negative pressure; when working, the opening of the exhaust valve (13) and the air supply valve (14) can be adjusted according to the external environment temperature; the exhaust valve (13) is arranged at the top of the heat pump housing (12) and corresponds to the exhaust fan (22) of the heat pump main unit (6).

9. A drying machine according to claim 8, characterized in that: A circulating fan (5) is arranged in the static pressure box (1), and a horizontal partition (20) is arranged in the static pressure box (1). The horizontal partition (20) divides the static pressure box (1) into an upper part of the static pressure box and a lower part of the static pressure box. The heat pump condenser (3) and the circulating fan (5) are arranged in the upper part of the static pressure box, the inlet of the heat pump condenser (3) is connected to the lower part of the static pressure box, and the outlet of the heat pump condenser (3) is connected to the inlet of the circulating fan (5).

10. A drying machine according to claim 8, characterized in that: A fresh air duct (10) is provided through one side wall of the heat pump housing (12); one end of the fresh air duct (10) is connected to the hot end outlet of the heat exchange component (4), and the other end is connected to the upper part of the static pressure box through a fresh air fan (11); And / or, a dehumidification air duct (9) is provided through one side wall of the heat pump housing (12); one end of the dehumidification air duct (9) is connected to the hot end inlet of the heat exchange component (4) through an air supply pipe (23); the other end is connected to the lower part of the drying chamber (2) through a dehumidification fan (7); and an air regulating valve (8) is provided on the dehumidification air duct (9).

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