Heat exchanger for freeze dryer

Abstract

The utility model provides a heat exchanger for a freeze dryer, which comprises a front end plate, an upper guide rod arranged at the upper end of the inner side of the front end plate, a lower guide rod arranged at the lower end of the inner side of the front end plate, a rear end plate parallel to the front end plate, an inlet a, an outlet a, an inlet b and an outlet b, an exchange plate is arranged on the inner side of the rear end plate, and an independent first channel and an independent second channel are arranged in the exchange plate in a crossed mode; a plurality of plate sheets are arranged between the inner side of the front end plate and the exchange plate in parallel; a port a, a port a1, a port b and a port b1 are formed in the plurality of plate sheets in a crossed manner; the inlet a, the outlet a, the opening a, the opening a1 and the first channel are communicated to form a first fluid channel, and the inlet b, the outlet b, the opening b, the opening b1 and the second channel are communicated to form a second fluid channel, so that independent and efficient exchange of heat energy and a cooling medium is realized, the energy is uniformly distributed when the heat energy and the cooling medium are exchanged, and the temperature of the plate sheet is kept uniform; and frost on the surface of the sheet is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchanger field especially relates to a freeze dryer is with heat exchanger. BACKGROUND

[0002] The heat exchanger used by the freeze dryer is a key component, and its main function is to realize heat exchange in the freeze drying process. In the freeze dryer, the heat exchanger plays a crucial role. It transfers and regulates heat to ensure that the freeze drying process can proceed smoothly. Specifically, the heat exchanger is mainly used in two aspects: one is to freeze the material, and the other is to perform sublimation drying.

[0003] Now there is a Chinese patent document CN201920772873.2, a freeze dryer is with integral heat exchanger, including: box, board layer, integral heat exchanger, circulating pump, pipeline, refrigeration liquid supply pipeline, refrigeration return pipeline, first solenoid valve, second solenoid valve, first temperature sensor and second temperature sensor, the box is fixedly installed in the board layer, the both sides of the board layer are fixedly connected with the circulating pump and the integral heat exchanger through the pipeline, the integral heat exchanger includes cylinder, capillary, coil, outlet pipeline, clamp, heating rod, inlet pipeline, spoiler, oil hole, cover plate and sealing ring, the freeze dryer is with integral heat exchanger, not only temperature lag is small, temperature adjusting speed is fast, temperature control is more accurate, and the mutual offset of cold and heat is avoided, more energy-saving, temperature control is more stable, and disassembly and maintenance are more convenient.

[0004] However, the above-mentioned patent has certain defects in use. Since the freeze dryer and the heat exchanger are designed in an integrated manner, frosting phenomenon may occur on the surface of the evaporator during long-term operation, which may cause an increase in thermal resistance and significantly reduce the heat transfer efficiency. The equipment needs to be frequently stopped for defrosting operation.

[0005] Therefore, a freeze dryer heat exchanger is proposed to solve the above-mentioned problems. INVENTION CONTENTS

[0006] In order to overcome the problem of frosting on the surface of the heat exchanger during long-term use, which affects the heat transfer efficiency, the utility model provides a freeze dryer heat exchanger.

[0007] The utility model adopts the following technical scheme to realize:

[0008] A freeze dryer heat exchanger, comprising a front end plate, an upper guide rod on the inner side of the front end plate, a lower guide rod on the lower end of the front end plate, and a rear end plate arranged in parallel with the front end plate, the front end plate is provided with a inlet and an outlet, and a inlet and an outlet are arranged in cross;

[0009] The inner side of the rear end plate is provided with an exchange plate, and the exchange plate is provided with an independent first channel and an independent second channel inside the exchange plate.

[0010] A plurality of plate pieces are arranged in parallel between the inner side of the front end plate and the exchange plate, and a port a and a port a1, a port b and a port b1 are arranged on the plurality of plate pieces in a cross manner;

[0011] The port a, the port a1 and the first channel are connected to form a first fluid channel, and the port b, the port b1 and the second channel are connected to form a second fluid channel.

[0012] As a preferred scheme of the utility model, two heat preservation layers are symmetrically arranged on both sides of the plurality of plate pieces, the plurality of plate pieces are clamped in the two heat preservation layers to form a sealed cavity, and the two heat preservation layers are provided with insertion grooves at both ends, which are fixed on the inner side walls of the front end plate and the rear end plate.

[0013] As a preferred scheme of the utility model, the plurality of plate pieces and the exchange plate are provided with upper installation grooves matched with the upper guide rods at the top ends and lower installation grooves matched with the lower guide rods at the lower ends.

[0014] As a preferred scheme of the utility model, the outer walls of the two heat preservation layers are provided with side blades, a plurality of reserved holes are arranged between the side blades, the front end plate and the rear end plate in a corresponding manner, bolts are installed in the plurality of reserved holes, and nuts are arranged at both ends of the front end plate and the rear end plate and fixed on both ends of the bolts.

[0015] As a preferred scheme of the utility model, the upper guide rod and the lower guide rod are connected with a support column at the tail ends, and the support column and the front end plate are provided with a foot stand at the bottom.

[0016] As a preferred scheme of the utility model, the exchange plate is internally provided with an exchange pipe, and the exchange pipe connects the first channel and the second channel.

[0017] As a preferred scheme of the utility model, the plurality of plate pieces are provided with heat conduction grooves.

[0018] Compared with the prior art, the utility model has the advantages that:

[0019] 1. By arranging the port a, the port a1, the port b and the port b1 on the front end plate in a cross manner, the first fluid channel is used for removing the heat energy of the freeze dryer, the heat energy enters from the port a, enters the first channel through the port a on the plurality of plate pieces, is transferred to the port a1 under the action of the first channel, the exchanged heat energy is finally introduced into the freeze dryer again from the port a, the second fluid channel is used for introducing the cooling medium of the cooling equipment from the port b, enters the second channel through the port b on the plurality of plate pieces, is transferred to the port b1 under the action of the second channel, and is finally discharged from the port b, the exchange pipe is arranged between the first channel and the second channel, the heat exchange temperature is more uniform, and the heat distribution on the plate pieces is more reasonable.

[0020] 2. A pair of heat insulation layers are symmetrically arranged on both sides of the plurality of plates, the heat insulation layers are close to the plates, external temperature influence is insulated, the heat insulation layers form a sealed cavity for the plates, and the heat insulation layers, the plates and the exchange plates are matched to ensure that the surface temperature difference of the heat exchanger is not too large to form surface frost to affect the exchange effect.

[0021] 3. The plurality of plates are fixed between the upper guide rod and the lower guide rod through the upper mounting groove and the lower mounting groove, and are fixed through the mounting bolts in the reserved holes and the fastening nuts at both ends, so that the installation process is greatly saved, and installation and maintenance are facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the overall structure diagram of the utility model;

[0023] Figure 2 is the explosion diagram of the utility model;

[0024] Figure 3 is the plate and exchange plate structure diagram of the utility model;

[0025] Figure 4 is the first fluid channel sectional view of the utility model;

[0026] Figure 5 is the second fluid channel sectional view of the utility model;

[0027] In the drawing: 1, front end plate; 11, a inlet; 12, a outlet; 13, b inlet; 14, b outlet; 2, rear end plate; 3, upper guide rod; 31, upper mounting groove; 4, lower guide rod; 41, lower mounting groove; 5, plate; 51, a port; 52, a1 port; 53, b port; 54, b1 port; 55, heat conduction groove; 6, exchange plate; 61, first channel; 62, second channel; 63, exchange pipe; 7, support column; 71, foot support; 8, heat insulation layer; 81, insertion slot; 82, side blade; 9, bolt; 91, reserved hole; 92, nut; 100, first fluid channel; 200, second fluid channel. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0029] Embodiment:

[0030] Please refer to Figures 1-5A heat exchanger for freeze dryer, comprising a front end plate 1, the inside upper end of the front end plate 1 is provided with an upper guide rod 3, the lower end is provided with a lower guide rod 4, and a rear end plate 2 is arranged in parallel with the front end plate 1, the front end plate 1 is provided with a cross a inlet 11 and a cross a outlet 12, and a cross b inlet 13 and a cross b outlet 14 are arranged;

[0031] The inside of the rear end plate 2 is provided with an exchange plate 6, and the inside of the exchange plate 6 is provided with a cross independent first channel 61 and a cross independent second channel 62;

[0032] A plurality of plate pieces 5 are arranged in parallel between the inside of the front end plate 1 and the exchange plate 6, and the plurality of plate pieces 5 are provided with a cross a port 51 and a cross a1 port 52, a cross b port 53 and a cross b1 port 54;

[0033] The a inlet 11, the a outlet 12, the cross a port 51 and the cross a1 port 52, and the first channel 61 are communicated to form a first fluid channel 100, and the b inlet 13, the b outlet 14, the cross b port 53 and the cross b1 port 54, and the second channel 62 are communicated to form a second fluid channel 200.

[0034] In the embodiment, the front end plate 1 is provided with an upper guide rod 3 at the upper side and a lower guide rod 4 at the lower side, the upper guide rod 3 and the lower guide rod 4 are connected with the rear end plate 2 which is parallel to the front end plate 1, the front end plate 1 is provided with an a inlet 11 and an a outlet 12 and a b inlet 13 and a b outlet 14 which are cross arranged to ensure independence, the inside of the rear end plate 2 is provided with an exchange plate 6, the inside of the exchange plate 6 is cross provided with a first channel 61 and a second channel 62 which are independently arranged and do not interfere with each other, a plurality of plate pieces 5 are arranged in parallel between the inside of the front end plate 1 and the exchange plate 6, the plate pieces 5 are cross provided with a a port 51, an a1 port 52, a b port 53 and a b1 port 54, the a port 51 and the a1 port 52 are cross arranged, the b port 53 and the b1 port 54 are cross arranged, when the plurality of plate pieces 5 are closely arranged, the a ports 51 of the plurality of plate pieces 5 are connected to form a channel, the a1 ports 52, the b ports 53 and the b1 ports 54 are the same, the a inlet 11, the a port 51, the a outlet 12 and the a1 port 52 are connected with the first channel 61 to form a complete first fluid channel 100, the b inlet 13, the b port 53, the b outlet 14 and the b1 port 54 are connected with the second channel 62 to form a complete second fluid channel 200, the first fluid channel 100 is used for heat energy discharged from the freeze dryer, the heat energy enters from the a inlet 11, enters the first channel 61 through the a ports 51 of the plurality of plate pieces 5, is transmitted to the a1 ports 52 under the action of the first channel 61, and finally reenters the freeze dryer from the a outlet 12, the second fluid channel 200 is used for cooling medium of the cooling device to enter from the b inlet 13, enter the second channel 62 through the b ports 53 of the plurality of plate pieces, be transmitted to the b1 ports 54 under the action of the second channel 62, and finally be discharged from the b outlet 14, so that independent and efficient exchange of the heat energy and the cooling medium is realized, energy is uniformly distributed when the heat energy and the cooling medium are exchanged, the temperature of the plate pieces 5 is kept uniform, and frost is reduced on the surface of the plate pieces 5.

[0035] Specifically, two heat preservation layers 8 are symmetrically arranged at the two sides of the plurality of plate pieces 5, the two heat preservation layers 8 clamp the plurality of plate pieces 5 to form a sealed cavity, and the two heat preservation layers 8 are provided with insertion grooves 81 at the two ends.

[0036] In the embodiment, the heat preservation layer 8 is provided with two heat preservation layers 8 which are symmetrically arranged with the support plate as the center, the two heat preservation layers 8 clamp the plurality of plate pieces 5 to form a sealed cavity, the temperature of the plate pieces 5 and the exchange plate 6 is kept uniform, and the temperature of the outside is avoided, the insertion grooves 81 are arranged on the inside of the front end plate 1 and the rear end plate 2, and the heat preservation layer 8 is convenient to install and seal.

[0037] Specifically, the plurality of plates 5 and the top end of the exchange plate 6 are provided with an upper mounting groove 31 matched with the upper guide rod 3, and the lower end is provided with a lower mounting groove 41 matched with the lower guide rod 4.

[0038] In this embodiment, the plurality of plates 5 and the top end of the exchange plate 6 are provided with an upper mounting groove 31, and the plurality of plates 5 and the bottom of the exchange plate 6 are provided with a lower mounting groove 41. When installing the plate 5 and the exchange plate 6, the upper mounting groove 31 is aligned with the upper guide rod 3, and the lower mounting groove 41 is aligned with the lower guide rod 4, ensuring accurate positioning of the plate 5 and the exchange plate 6, ensuring close fit between the plurality of plates 5 and the exchange plate 6, and ensuring sealing performance.

[0039] Specifically, the outer wall of the heat preservation layer 8 is provided with a side blade 82, and a plurality of reserved holes 91 are arranged between the side blade 82, the front end plate 1 and the rear end plate 2. A plurality of bolts 9 are installed in the plurality of reserved holes 91, and nuts 92 are fixed at both ends of the bolts 9.

[0040] In this embodiment, the outer wall of the heat preservation layer 8 is provided with a side blade 82, and a plurality of reserved holes 91 are arranged on the side blade 82, the front end plate 1 and the rear end plate 2. A plurality of bolts 9 are installed in the plurality of reserved holes 91, and nuts 92 are fixed at both ends of the bolts 9.

[0041] Specifically, the upper guide rod 3 and the lower guide rod 4 are connected with a support 7 at the end, and the bottom of the support 7 and the bottom of the front end plate 1 are provided with a foot 71.

[0042] In this embodiment, the upper guide rod 3 and the lower guide rod 4 are connected with a support 7 at the end, and the support 7 is fixed at the end of the upper guide rod 3 and the lower guide rod 4 after installation. The foot 71 plays a supporting role to ensure the stability of the whole device structure.

[0043] Specifically, the exchange plate 6 is provided with an exchange pipe 63 inside, and the exchange pipe 63 connects the first channel 61 and the second channel 62.

[0044] In this embodiment, the first channel 61 and the second channel 62 are provided with an exchange pipe 63, and the exchange pipe 63 is located in the exchange pipe 63. The exchange pipe 63 can directly exchange the medium of the first channel 61 and the second channel 62, ensuring the heat exchange efficiency.

[0045] Specifically, a plurality of heat conduction grooves 55 are arranged on the plurality of plates 5.

[0046] In this embodiment, the plurality of heat conduction grooves 55 on the plate 5 are used to ensure uniform heat transfer between the plate 5 and the exchange plate 6.

[0047] The utility model discloses a principle is: freeze dryer will cyclic exclusion's heat energy from a import 11 into the equipment, the way a mouth 51 on multiple board piece 5 enters first passageway 61, under the action of first passageway 61, transfer to a1 mouth 52, complete the heat energy of exchange finally from a export 12 again enter freeze dryer, under the action of first fluid passageway 100, second fluid passageway 200 for cooling equipment's cooling medium from b import 13 enters, through the b mouth 53 on multiple board piece enters second passageway 62, under the action of second passageway 62, transfer to b1 mouth 54, finally from b export 14 discharge, thereby realize the independent high -efficient exchange of heat energy and cooling medium, when heat energy and cold medium exchange, energy distribution is even, and board piece 5 temperature keeps uniform, reduce the frost of board piece 5 surface appearance.

[0048] The above is only the preferred embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art in the technical range disclosed by the utility model, according to the technical scheme of the utility model and its improvement concept, equivalent replacement or change, should be covered in the protection scope of the utility model.

Claims

1. A heat exchanger for a freeze dryer, comprising a front end plate, an upper guide rod arranged on an upper end of an inner side of the front end plate, a lower guide rod arranged on a lower end of the inner side of the front end plate, and a rear end plate arranged in parallel with the front end plate, characterized in that: The front end plate is provided with a inlet and an outlet of a, and a inlet and an outlet of b; The inside of the rear end plate is provided with an exchange plate, and the inside of the exchange plate is provided with an independent first channel and an independent second channel; A plurality of plate pieces are arranged in parallel between the inside of the front end plate and the exchange plate, and the plate pieces are provided with a and a1, and b and b1; The a inlet, the a outlet, the a and a1, and the first channel are connected to form a first fluid channel, and the b inlet, the b outlet, the b and b1, and the second channel are connected to form a second fluid channel.

2. The heat exchanger for a freeze dryer according to claim 1, wherein: Two heat preservation layers are symmetrically arranged on both sides of the plate pieces, the heat preservation layers clamp the plate pieces to form a sealed cavity, and the heat preservation layers are provided with insertion slots at both ends, which are fixed on the inner walls of the front end plate and the rear end plate.

3. The freeze-dryer heat exchanger of claim 2, wherein: The plate pieces and the exchange plate are provided with upper installation grooves matched with upper guide rods at the top ends, and lower installation grooves matched with lower guide rods at the lower ends.

4. The freeze dryer heat exchanger of claim 2, wherein: The outer walls of the heat preservation layers are provided with side blades, and a plurality of reserved holes are arranged between the side blades, the front end plate and the rear end plate, bolts are arranged in the reserved holes, and nuts are arranged at both ends of the bolts and fixed on the front end plate and the rear end plate.

5. The heat exchanger for a freeze dryer according to claim 4, wherein: The upper guide rods and the lower guide rods are connected with support columns at the ends, and the support columns and the front end plate are provided with foot supports at the bottom.

6. The freeze dryer heat exchanger of claim 1, wherein: The exchange plate is provided with an exchange pipe connected with the first channel and the second channel.

7. The freeze dryer heat exchanger of claim 1, wherein: The plate pieces are provided with heat conduction grooves.

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