An air source water heater suitable for aquaculture

Abstract

The invention discloses an air source water heater suitable for aquaculture, belonging to the field of water heaters. An air source water heater suitable for aquaculture comprises a cabinet, a fan, a compressor, and a heat exchanger; there are two heat exchangers, which are arranged in a "V" shape; a defroster is arranged on the heat exchanger; the defroster comprises an outer shell and a defrost roller rotatably connected in the outer shell; the defrost roller is parallel to the heat exchanger; a plurality of scraping mechanisms are evenly arranged on the defrost roller along the circumference; the scraping mechanism comprises a defrost knife and an ice-removing knife which slide radially along the defrost roller; scraping teeth are evenly arranged at the end of the ice-removing knife; there is a gap between two adjacent scraping teeth; the movement directions of the defrost knife and the ice-removing knife are opposite. This scheme cleans the frost and ice condensed on the surface of the heat exchanger by arranging a defroster, avoids the frost and ice from affecting the normal operation of the heat exchanger, and does not require the air source water heater to be shut down, thereby improving the working efficiency of the air source water heater.

Description

Technical Field

[0001] The invention belongs to the field of water heaters, and more specifically, relates to an air source water heater suitable for aquaculture. Background Art

[0002] In the field of aquaculture, water temperature is a key factor. Different aquatic organisms have different requirements for water temperature. Inappropriate water temperature can lead to slow growth, decreased immunity, and even death of aquatic organisms. Air source water heaters can quickly adjust the water temperature of the temporary holding pond, help aquatic organisms adapt to the new environment as quickly as possible, reduce stress reactions, and improve the survival rate of temporary holdings.

[0003] When the air source water heater is working in an environment with low outside temperature, frost is easy to condense on the surface of the heat exchanger, which will affect the working efficiency of the heat exchanger. Even after a long time, the surface of the heat exchanger will freeze and be difficult to clean.

[0004] There are usually two ways to defrost and ice in existing solutions. One is to heat the surface of the heat exchanger to melt the frost and ice, but the heat exchanger needs to stop working during the heating process, that is, the air source water heater needs to be shut down, which affects the working efficiency of the air source water heater. The other is to use an ultrasonic generator to vibrate the surface of the heat exchanger at a high frequency to shake off the frost and ice, but high-frequency vibration will damage the internal parts of the heat exchanger, accelerate the splitting of the joints in the heat exchanger, and reduce the service life of the heat exchanger. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an air source water heater suitable for aquaculture, which can realize defrosting and deicing of a heat exchanger without stopping the machine.

[0006] The present invention discloses an air source water heater suitable for aquaculture, comprising a cabinet, a fan, a compressor and a heat exchanger; the heat exchangers are two and arranged in a "V" shape; a defroster is arranged on the heat exchanger; the defroster comprises an outer shell and a defrost roller rotatably connected in the outer shell; the defrost roller is parallel to the heat exchanger; a plurality of scraping mechanisms are evenly arranged on the defrost roller along the circumference; the scraping mechanism comprises a defrost knife and a de-icing knife which slide radially along the defrost roller; scraping teeth are evenly arranged on the end of the de-icing knife; there is a gap between two adjacent scraping teeth; the movement direction of the defrost knife is opposite to that of the de-icing knife.

[0007] As a further improvement of the present invention, the scraping mechanism also includes a sliding plate that slides axially in the defrost roller; the sliding plate is used to drive the defrost knife and the de-icing knife to move; a switching column is coaxially arranged at one end of the defrost roller; each sliding plate is fixedly connected to the switching column; when the switching column rotates circumferentially, the switching column drives the defrost roller and each scraping mechanism to rotate synchronously; when the switching column slides axially, the switching column drives the sliding plate to move.

[0008] As a further improvement of the present invention, the defrost blade is provided with a first inclined groove distributed obliquely; the sliding plate is provided with a first protrusion slidably connected to the first inclined groove; the deicing blade is provided with a second inclined groove distributed obliquely; the sliding plate is provided with a second protrusion slidably connected to the second inclined groove; the first inclined groove and the second inclined groove have opposite inclination directions, and the first inclined groove and the second inclined groove are located in the sliding plane of the defrost blade.

[0009] As a further improvement of the present invention, a driving gear is coaxially arranged on the switching column; a switching gear meshing with the driving gear is rotatably connected to the outer shell; a positioning column coaxially distributed with the switching gear is fixedly connected to the outer shell; a sliding groove distributed in a wavy line is circumferentially arranged on the outer wall of the positioning column; a ratchet moving along the sliding groove is rotatably connected to the outer wall of the positioning column; the ratchet is connected to the switching gear in a one-way transmission connection; the ratchet and the switching column slide axially synchronously.

[0010] As a further improvement of the present invention, the slide groove is closed at both ends; the slide groove includes a first positioning point, a second positioning point, and a connecting groove connecting the first positioning point and the second positioning point; and the ratchet is provided with a protrusion that is slidably connected to the slide groove.

[0011] As a further improvement of the present invention, ratchet teeth are evenly arranged on the ratchet wheel along the circumferential direction; a pawl cooperating with the ratchet teeth is arranged on the switching gear; and the pawl is made of elastic material.

[0012] As a further improvement of the present invention, the outer wall of the switching column is provided with a circular ring-shaped synchronization groove; a synchronization slide that is engaged with the synchronization groove is connected to the axial sliding of the defrost roller on the outer shell; the ratchet is rotatably connected to the synchronization slide, and the ratchet and the synchronization slide slide slide axially synchronously.

[0013] As a further improvement of the present invention, the defroster also includes two symmetrically arranged screws and a screw motor driving the screws to rotate; the housing is transmission-connected to the screws; the axis of the screw is parallel to the surface of the heat exchanger and perpendicular to the axis of the defrost roller.

[0014] As a further improvement of the present invention, the outer wall of the defrost roller is evenly provided with receiving grooves along the circumferential direction; the receiving grooves are used to accommodate the frost and ice to be scraped off; the scraping mechanism also includes a push plate that slides radially along the defrost roller in the receiving groove; the push plate is used to push the frost and ice in the receiving groove out.

[0015] As a further improvement of the present invention, a mounting groove is provided inside the defrost roller; an eccentric rod is fixedly connected to the outer shell at an eccentric position in the mounting groove; abutment plate extending into the mounting groove and abutting against the surface of the eccentric rod is provided at one end of the push plate; the push plate close to the heat exchanger is located on the inner side of the receiving groove, and the push plate away from the heat exchanger is located at the opening of the receiving groove.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: this solution clears the frost and ice condensed on the surface of the heat exchanger by setting a defroster, thereby preventing the frost and ice from affecting the normal operation of the heat exchanger, and there is no need to shut down the air source water heater, thereby improving the working efficiency of the air source water heater.

[0017] Frost has a low adhesion force and is easy to clean, while ice has a high adhesion force and requires greater force to clean. This solution switches between the defrost blade and the de-icing blade so that the defrost blade is in full contact with the surface of the heat exchanger, thereby improving the defrosting efficiency. Under the same output force, the force area is inversely proportional to the pressure, so the scraping teeth on the de-icing blade are narrower, reducing the contact area between the de-icing blade and the heat exchanger, thereby increasing the pressure of the de-icing blade on the ice and forcing the ice to break.

[0018] This solution sets a switching column so that when the switching column rotates circumferentially, the switching column drives the defrost roller and each scraping mechanism to transmit circumferentially synchronously, thereby facilitating the operation of the scraping mechanism; when the switching column slides axially, the switching column can drive the defrost knife and the de-icing knife to slide radially, thereby switching the defrost knife and the de-icing knife.

[0019] When the defrost roller rotates, it drives the defrost knife and the de-icing knife to move, so that the defrost knife or the de-icing knife works. At the same time, the defrost roller also drives the push plate to move, so that the push plate moves along the eccentric rod, pushing the frost and ice in the container groove into the outer shell, so that the frost and ice can be centrally processed later.

[0020] This solution switches the rotation of the gear so that when the gear rotates forward, it only drives the defrost roller to rotate forward, thereby defrosting or de-icing the heat exchanger. When the gear rotates reversely, it drives the ratchet wheel to rotate, so that the protrusion switches between the first positioning point and the second positioning point, thereby driving the defrost knife and the de-icing knife to switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the defroster of the present invention;

[0023] Figure 3 is a cross-sectional structural schematic diagram of the defroster of the present invention;

[0024] Figure 4 It is a partial enlarged structural schematic diagram of the defroster of the present invention;

[0025] Figure 5 It is a schematic diagram of the exploded structure of the defroster of the present invention;

[0026] Figure 6It is a schematic diagram of the exploded structure of the scraping mechanism of the present invention;

[0027] Figure 7 It is a schematic diagram of the exploded structure of the switching gear, the positioning column and the switching column of the present invention.

[0028] Description of the numbers in the figure:

[0029] 11. Cabinet; 12. Heat exchanger; 13. Defroster; 14. Fan; 21. Screw; 22. Screw motor; 3. Housing; 4. Defrosting roller; 41. Receiving groove; 42. Mounting groove; 5. Scraping mechanism; 51. Eccentric rod; 52. Push plate; 521. Stop plate; 61. Defrosting knife; 611. First slanted groove; 612. First flat groove; 62. Deicing knife; 621. Scraping teeth; 622. Second slanted groove; 623. Two flat grooves; 63, sliding plate; 631, first protrusion; 632, second protrusion; 71, switching column; 711, slot; 712, driving gear; 713, synchronous slot; 72, synchronous slide plate; 73, switching gear; 731, pawl; 74, ratchet; 741, ratchet; 742, protrusion; 75, positioning column; 751, first positioning point; 752, second positioning point; 753, slide groove; 8, driving motor. DETAILED DESCRIPTION

[0030] Specific embodiment 1: Please refer to Figure 1-Figure 7 An air source water heater suitable for aquaculture comprises a cabinet 11, a fan 14, a compressor and a heat exchanger 12; the heat exchanger 12 has two and is distributed in a "V" shape; a defroster 13 is arranged on the heat exchanger 12; the defroster 13 comprises a shell 3 and a defrost roller 4 rotatably connected in the shell 3; the defrost roller 4 is parallel to the heat exchanger 12; a plurality of scraping mechanisms 5 are evenly arranged on the defrost roller 4 along the circumferential direction; the scraping mechanism 5 comprises a defrost knife 61 and an ice-removing knife 62 which slide radially along the defrost roller 4; scraping teeth 621 are evenly arranged on the end of the ice-removing knife 62; there is a gap between two adjacent scraping teeth 621; the movement directions of the defrost knife 61 and the ice-removing knife 62 are opposite.

[0031] When the defrost knife 61 is located at the outer limit position of the defrost roller 4, the de-icing knife 62 is located at the inner limit position, and the defrost knife 61 contacts the surface of the heat exchanger 12; when the defrost knife 62 is located at the outer limit position of the defrost roller 4, the defrost knife 61 is located at the inner limit position, and the de-icing knife 62 contacts the surface of the heat exchanger 12.

[0032] Since there are intervals between the scraping teeth 621 on the de-icing blade 62, the contact area between the de-icing blade 62 and the surface of the heat exchanger 12 is small, and the scraping teeth 621 exert a greater pressure on the surface of the heat exchanger 12, which facilitates the removal of ice attached to the surface of the heat exchanger 12.

[0033] The blades on the defrost knife 61 are arranged continuously without any intervals, so that the defrost knife 61 is in full contact with the surface of the heat exchanger 12, thereby improving the cleaning efficiency of the defrost knife 61 in cleaning frost on the surface of the heat exchanger 12.

[0034] The scraping mechanism 5 also includes a sliding plate 63 that slides axially in the defrost roller 4; the sliding plate 63 is used to drive the defrost knife 61 and the de-icing knife 62 to move; a switching column 71 is coaxially arranged at one end of the defrost roller 4; each sliding plate 63 is fixedly connected to the switching column 71; when the switching column 71 rotates circumferentially, the switching column 71 drives the defrost roller 4 and each scraping mechanism 5 to rotate synchronously; when the switching column 71 slides axially, the switching column 71 drives the sliding plate 63 to move.

[0035] The outer wall of the switching column 71 is evenly provided with slots 711 along the circumferential direction; the sliding plate 63 is plugged and fixed in the slots 711 .

[0036] The defrost knife 61 is provided with a first inclined groove 611 distributed obliquely; the sliding plate 63 is provided with a first protrusion 631 slidably connected to the first inclined groove 611; the deicing knife 62 is provided with a second inclined groove 622 distributed obliquely; the sliding plate 63 is provided with a second protrusion 632 slidably connected to the second inclined groove 622; the first inclined groove 611 and the second inclined groove 622 are inclined in opposite directions, and the first inclined groove 611 and the second inclined groove 622 are located in the sliding plane of the defrost knife 61.

[0037] The first flat grooves 612 are respectively provided at both ends of the first inclined groove 611; the second flat grooves 623 are respectively provided at both ends of the second inclined groove 622; the extension direction of the first flat groove 612 and the second flat groove 623 is parallel to the sliding direction of the sliding plate 63; when the first protrusion 631 moves into the first flat groove 612, the defrost knife 61 is subjected to the reaction force of the heat exchanger 12, so that the defrost knife 61 has a tendency to move toward the inside of the defrost roller 4, and since the first flat groove 612 is perpendicular to the sliding direction of the defrost knife 61, the defrost knife 61 will not move; similarly, when the second protrusion 632 is located in the second flat groove 623, the defrost knife 62 will not slide along the radial direction of the defrost roller 4.

[0038] A driving gear 712 is coaxially arranged on the switching column 71; a switching gear 73 meshing with the driving gear 712 is rotatably connected to the outer shell 3; a positioning column 75 coaxially distributed with the switching gear 73 is fixedly connected to the outer shell 3; a sliding groove 753 distributed in a wavy line is circumferentially arranged on the outer wall of the positioning column 75; a ratchet 74 moving along the sliding groove 753 is rotatably connected to the outer wall of the positioning column 75; the ratchet 74 is connected to the switching gear 73 in a one-way transmission connection; the ratchet 74 and the switching column 71 slide synchronously axially.

[0039] The slide groove 753 is closed at both ends; the slide groove 753 includes a first positioning point 751, a second positioning point 752, and a connecting groove connecting the first positioning point 751 and the second positioning point 752; the ratchet 74 is provided with a protrusion 742 that is slidably connected to the slide groove 753.

[0040] When the protrusion 742 is located at the first positioning point 751, the ratchet 74 and the switching column 71 move axially to the first position. At this time, the switching column 71 uses the sliding plate 63 to make the defrost knife 61 located at the outer limit position of the defrost roller 4, and the de-icing knife 62 is located on the inner side; when the protrusion 742 is located at the second positioning point 752, the defrost knife 61 is located on the inner side, and the de-icing knife 62 is located at the outer limit position of the defrost roller 4.

[0041] The ratchet wheel 74 is evenly provided with ratchet teeth 741 along the circumferential direction; the switching gear 73 is provided with a ratchet pawl 731 that cooperates with the ratchet teeth 741; the ratchet pawl 731 is made of elastic material.

[0042] Through the cooperation between the ratchet 74 and the pawl 731, when the switching gear 73 rotates forward, the ratchet 74 does not rotate, and the switching gear 73 only drives the defrost roller 4 to rotate forward; when the switching gear 73 rotates reversely, the switching gear 73 will drive the defrost roller 4 and the ratchet 74 to rotate synchronously in the reverse direction, and then the protrusion 742 moves along the slide groove 753, and then the protrusion 742 switches between the first positioning point 751 and the second positioning point 752.

[0043] The outer wall of the switching column 71 is provided with a circular ring-shaped synchronization slot 713; the outer shell 3 is axially slidably connected with a synchronization slide 72 engaged with the synchronization slot 713 along the defrost roller 4; the ratchet 74 is rotatably connected to the synchronization slide 72, and the ratchet 74 and the synchronization slide 72 slide axially synchronously.

[0044] The switching gear 73 is rotatably connected to the synchronous slide 72 ; the synchronous slide 72 is fixedly connected to a driving motor 8 for driving the switching gear 73 to rotate.

[0045] The defroster 13 further includes two symmetrically arranged screws 21 and a screw motor 22 for driving the screws 21 to rotate; the housing 3 is transmission-connected to the screws 21; the axis of the screw 21 is parallel to the surface of the heat exchanger 12 and perpendicular to the axis of the defrost roller 4.

[0046] The outer wall of the defrost roller 4 is evenly provided with receiving grooves 41 along the circumferential direction; the receiving grooves 41 are used to accommodate the frost and ice to be scraped off; the scraping mechanism 5 also includes a push plate 52 that slides radially along the defrost roller 4 in the receiving grooves 41; the push plate 52 is used to push the frost and ice in the receiving grooves 41 out.

[0047] A mounting groove 42 is provided inside the defrost roller 4; an eccentric rod 51 is fixedly connected to the outer shell 3 at an eccentric position in the mounting groove 42; a support plate 521 is provided at one end of the push plate 52, extending into the mounting groove 42 and abutting against the surface of the eccentric rod 51; a spring is provided between the push plate 52 and the receiving groove 41, driving the support plate 521 to abut against the surface of the eccentric rod 51; the push plate 52 close to the heat exchanger 12 is located on the inner side of the receiving groove 41, and the push plate 52 away from the heat exchanger 12 is located at the opening of the receiving groove 41.

[0048] As the defrost roller 4 rotates, the abutment plate 521 slides along the surface of the eccentric rod 51 , and then the push plate 52 slides back and forth in the receiving groove 41 , so as to push out the frost and ice in the receiving groove 41 .

[0049] In the initial state, the protrusion 742 is located within the first positioning point 751 , and the defrost blade 61 is located at the outer limit position of the defrost roller 4 .

[0050] When the defrost 13 is working, the screw motor 22 drives the screw 21 to rotate, so that the housing 3 moves slowly along the surface of the heat exchanger 12. At the same time, the drive motor 8 drives the switching gear 73 to rotate forward, and the switching gear 73 only drives the switching column 71 to rotate, and then the defrost roller 4 rotates forward synchronously. When a defrost knife 61 contacts the heat exchanger 12, the movement direction of the defrost knife 61 is to move upward from the heat exchanger 12, and then the frost scraped by the defrost knife 61 gathers on the surface of the defrost knife 61. As the defrost roller 4 continues to rotate, the scraped frost enters the container 41 along the surface of the defrost knife 61 for temporary storage.

[0051] The defrost roller 4 continues to rotate forward, and the container 41 containing frost gradually moves away from the heat exchanger 12 and moves into the shell 3. At the same time, the push plate 52 gradually pushes the frost in the container 41 to the opening of the container 41, and finally the frost falls into the shell 3.

[0052] The above process is repeated, and the defrost blade 61 continuously scrapes off the frost on the surface of the heat exchanger 12 .

[0053] After the defrost blade 61 is loaded with ice, it is difficult for the defrost blade 61 to continue to move. At this time, the driving motor 8 drives the switching gear 73 to rotate in the opposite direction, and the defrost roller 4 rotates in the opposite direction synchronously, so that the defrost blade 61 is away from the ice. At the same time, the switching gear 73 drives the ratchet 74 to rotate in the opposite direction, and the protrusion 742 moves from the first positioning point 751 to the second positioning point 752, and then the ratchet 74 drives the synchronous slide plate 72 to move axially together, and the synchronous slide plate 72 drives the switching column 71 to move synchronously. The switching column 71 drives each sliding plate 63 to move, the first protrusion 631 slides along the first inclined groove 611, and the second protrusion 632 slides along the second inclined groove 622, and then the defrost blade 61 moves toward the inside of the defrost roller 4, and the defrost blade 62 moves to the outer limit position of the defrost roller 4.

[0054] Then the driving motor 8 drives the switching gear 73 to rotate forward, and the defrosting roller 4 drives the de-icing blade 62 to rotate forward, and the de-icing blade 62 cuts off the ice on the surface of the heat exchanger 12. The cut ice enters the receiving groove 41, and finally falls into the housing 3 under the action of the push plate 52.

[0055] After defrosting is completed, the switching gear 73 rotates in the opposite direction, the protrusion 742 moves from the second positioning point 752 to the first positioning point 751, and the defrost knife 61 moves to the outer limit position of the defrost roller 4, and the defrost knife 61 continues to work.

[0056] Finally, the frost and ice accumulated in the outer shell 3 are processed centrally, and the frost and ice in the outer shell 3 are directly discharged to the outside of the cabinet 11 to prevent the frost and ice from falling into the cabinet 11.

Claims

1. An air source water heater suitable for aquaculture, characterized by: It includes a cabinet, a fan, a compressor, and a heat exchanger; the heat exchangers have two and are arranged in a "V" shape; a defroster is arranged on the heat exchanger; the defroster includes a shell and a defrost roller rotatably connected to the shell; the defrost roller is parallel to the heat exchanger; a plurality of scraping mechanisms are evenly arranged on the defrost roller along the circumference; the scraping mechanism includes a defrost knife and an ice-removing knife which slide radially along the defrost roller; scraping teeth are evenly arranged on the end of the ice-removing knife; there is a gap between two adjacent scraping teeth; the movement directions of the defrost knife and the ice-removing knife are opposite; The scraping mechanism also includes a sliding plate that slides axially in the defrosting roller; the sliding plate is used to drive the defrosting blade and the de-icing blade to move; a switching column is coaxially arranged at one end of the defrosting roller; each sliding plate is fixedly connected to the switching column; when the switching column rotates circumferentially, the switching column drives the defrosting roller and each scraping mechanism to rotate synchronously; when the switching column slides axially, the switching column drives the sliding plate to move; The defrost blade is provided with a first inclined groove distributed obliquely; the sliding plate is provided with a first protrusion slidably connected to the first inclined groove; the deicing blade is provided with a second inclined groove distributed obliquely; the sliding plate is provided with a second protrusion slidably connected to the second inclined groove; the first inclined groove and the second inclined groove have opposite inclination directions, and the first inclined groove and the second inclined groove are located in the sliding plane of the defrost blade.

2. The air source water heater suitable for aquaculture according to claim 1, characterized in that: A driving gear is coaxially arranged on the switching column; a switching gear meshing with the driving gear is rotatably connected to the outer shell; a positioning column coaxially distributed with the switching gear is fixedly connected to the outer shell; a sliding groove distributed in a wavy line is circumferentially arranged on the outer wall of the positioning column; a ratchet that moves along the sliding groove is rotatably connected to the outer wall of the positioning column; the ratchet is connected to the switching gear in a one-way transmission connection; the ratchet and the switching column slide synchronously axially.

3. The air source water heater suitable for aquaculture according to claim 2, characterized in that: The slide groove is closed at both ends; the slide groove includes a first positioning point, a second positioning point, and a connecting groove connecting the first positioning point and the second positioning point; the ratchet is provided with a protrusion that is slidably connected to the slide groove.

4. The air source water heater suitable for aquaculture according to claim 2, characterized in that: The ratchet wheel is evenly provided with ratchet teeth along the circumferential direction; the switching gear is provided with a pawl matched with the ratchet teeth; and the pawl is made of elastic material.

5. The air source water heater suitable for aquaculture according to claim 2, characterized in that: The outer wall of the switching column is provided with a circular synchronous slot; the outer shell is slidably connected to the defrost roller along the axial direction with a synchronous slide engaged with the synchronous slot; the ratchet is rotatably connected to the synchronous slide, and the ratchet and the synchronous slide slide slide axially synchronously.

6. The air source water heater suitable for aquaculture according to claim 1, characterized in that: The defroster also includes two symmetrically arranged screws and a screw motor driving the screws to rotate; the housing is transmission-connected to the screws; the axis of the screws is parallel to the surface of the heat exchanger and perpendicular to the axis of the defrosting roller.

7. The air source water heater suitable for aquaculture according to claim 1, characterized in that: The outer wall of the defrost roller is evenly provided with receiving grooves along the circumferential direction; the receiving grooves are used to accommodate the frost and ice to be scraped off; the scraping mechanism also includes a push plate that slides in the receiving groove along the radial direction of the defrost roller; the push plate is used to push out the frost and ice in the receiving groove.

8. The air source water heater suitable for aquaculture according to claim 7, characterized in that: A mounting groove is provided inside the defrost roller; an eccentric rod is fixedly connected to the outer shell at an eccentric position in the mounting groove; abutment plate extending into the mounting groove and abutting against the surface of the eccentric rod is provided at one end of the push plate; the push plate close to the heat exchanger is located on the inner side of the receiving groove, and the push plate away from the heat exchanger is located at the opening of the receiving groove.

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