Frosting detection device of low-environment-temperature heat pump

Abstract

The utility model provides a frosting detection device of a low-environment-temperature heat pump, and relates to the technical field of air conditioning equipment, which is characterized in that a trigger detection component is arranged in a mounting shell, the trigger detection component is mounted on a fixed bracket, the fixed end of an electric push rod is fixedly connected with the inner wall of the mounting shell, and the output end of the electric push rod is fixedly connected with the fixed bracket; the sealing shell is fixedly connected with the inner wall of the mounting shell, and a sensing assembly is arranged in the sealing shell. The detection device can be conveniently installed at the frosting position in the heat pump unit through arrangement of the installation frame, and after the current temperature in the heat pump unit is sensed through arrangement of the sensing assembly, the detection assembly is controlled and triggered to detect the frosting condition of the heat pump unit; whether the heat pump unit is frosted or not can be judged by controlling the arrangement of the trigger detection assembly, and then the defrosting time is determined, so that higher energy efficiency is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning equipment, in particular to a frost detection device for a low ambient temperature heat pump. Background Art

[0002] In the existing patent: CN202320734019.3--a low ambient temperature heat pump heating unit, including: a heat pump heating unit body and a fan arranged on the heat pump heating unit body; also including a dust removal unit, a dust collection structure and a movable filter structure; the dust removal unit is arranged on the front side of the heat pump heating unit body; the dust removal unit includes a dust removal box, a brush plate fixedly installed in the dust removal box, an anode electrode plate fixedly installed in the dust removal box and facing away from the brush plate, a cathode electrode plate fixedly passing through the front side of the heating unit body and horizontally corresponding to the anode electrode plate, and a dust removal port opened at the bottom of the dust removal box.

[0003] In the above patents, it is difficult to accurately detect frost, and defrosting often fails or is performed by mistake, resulting in a sharp decrease in the energy efficiency of the unit, affecting the use effect. In addition, existing models on the market usually detect whether frost has formed based on the running time of the unit, and the energy consumption of defrosting by mistake is particularly large. Therefore, the utility model provides a frost detection device for a low ambient temperature heat pump to solve one or more of the above problems. Utility Model Content

[0004] The utility model provides a frost detection device for a low ambient temperature heat pump, which is used to solve the problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: including: a trigger detection component is provided in the installation shell, the trigger detection component is installed on a fixed bracket, the fixed end of the electric push rod is fixedly connected to the inner wall of the installation shell, the output end of the electric push rod is fixedly connected to the fixed bracket, the sealed shell is fixedly connected to the inner wall of the installation shell, and an induction component is provided in the sealed shell.

[0006] Preferably, three groups of mounting frames are fixedly provided around the outer wall of the mounting shell, and threaded holes for connection are provided on the mounting frames.

[0007] Preferably, the sensing component comprises: guide columns, two groups of guide columns are respectively fixedly connected to the inner wall of the sealing shell, and the outer walls of the two groups of guide columns are movably sleeved with U-shaped guide pieces, and a push plate is fixedly provided between the two groups of U-shaped guide pieces.

[0008] Preferably, a sealed cavity is formed between the sealing shell and the guide column, the U-shaped guide member and the push plate, and the cavity is filled with mercury.

[0009] Preferably, one end of the connecting spring is fixedly connected to the push plate, the other end of the connecting spring is fixedly connected to the sealing shell, the trigger electrode 1 is fixedly connected to the guide column, and the trigger electrode 2 is fixedly connected to the U-shaped guide piece.

[0010] Preferably, the trigger detection assembly includes: a detection box, a fixed bracket fixedly connected to the detection box, one end of the push rod movably extending into the detection box and fixedly provided with a contact 1, the other end of the push rod is fixedly provided with a push head, and a temperature sensor is installed in the push head, and a reset spring is fixedly sleeved on one end of the push rod extending from the outer wall of the detection box.

[0011] Preferably, the push rod is arranged on the outer wall of the detection box body and a bearing seat is installed. The threaded rod is rotatably connected to the outer wall of the push rod through the bearing seat. The threaded sleeve and the gear are both sleeved on the outer wall of the threaded rod. The threaded sleeve and the threaded rod are connected by threads, and the gear and the threaded rod are fixedly connected.

[0012] Preferably, the tooth plate is fixedly connected to the inner wall of the detection box, and the gear is meshed with the tooth plate, a limiting slide groove is provided on the U-shaped bracket, and the threaded sleeve is arranged in the limiting slide groove of the U-shaped bracket and is movably connected to the U-shaped bracket.

[0013] Preferably, a guide slot is provided on the inner wall of the detection box, a guide plate is movably arranged in the guide slot, and the guide plate is fixedly connected to the U-shaped bracket, one end of the first connecting rod is fixedly connected to the guide plate, and a contact three is fixedly provided on the other end of the first connecting rod.

[0014] Preferably, one end of the power connection block is fixedly connected to the inner wall of the detection box, and the other end of the power connection block is fixedly provided with a second contact.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The setting of the mounting frame can facilitate the installation of the detection device at the frosting position in the heat pump unit. The setting of the sensing component can sense the current temperature in the heat pump unit and control the trigger detection component to detect the frosting condition of the heat pump unit. By controlling the setting of the trigger detection component, it is possible to judge whether the heat pump unit is frosted and then determine the defrosting timing, thereby achieving higher energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0018] In the attached picture:

[0019] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model;

[0020] Figure 2This is a schematic diagram of the appearance structure of the trigger detection component of the utility model;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the trigger detection component of the utility model;

[0022] Figure 4 This is a schematic diagram of the U-shaped guide connection structure of the utility model.

[0023] In the figure: 1. Installation shell; 2. Trigger detection component; 3. Fixed bracket; 4. Electric push rod; 5. Mounting frame; 6. Connecting spring; 7. Sealing shell; 8. Mercury; 9. Push plate; 10. Guide column; 11. Trigger electrode one; 12. Trigger electrode two; 13. U-shaped guide; 14. Detection box; 15. Reset spring; 16. Push head; 17. Push rod; 18. Threaded rod; 19. U-shaped bracket; 20. Threaded sleeve; 21. Gear; 22. Bearing seat; 23. Contact one; 24. Contact two; 25. Guide slide; 26. Guide plate; 27. First connecting rod; 28. Contact three; 29. ​​Tooth plate; 30. Power connection block. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0025] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0026] Example 1

[0027] The present invention provides a frost detection device for a low ambient temperature heat pump. Figure 1 As shown, it includes: a trigger detection component 2 is provided in the installation shell 1, the trigger detection component 2 is installed on the fixed bracket 3, the fixed end of the electric push rod 4 is fixedly connected to the inner wall of the installation shell 1, the output end of the electric push rod 4 is fixedly connected to the fixed bracket 3, the sealed shell 7 is fixedly connected to the inner wall of the installation shell 1, and the sealed shell 7 is provided with a sensing component.

[0028] Preferably, three groups of mounting frames 5 are fixedly disposed around the outer wall of the mounting shell 1 , and threaded holes for connection are opened on the mounting frames 5 .

[0029] The beneficial effects of the above technical solution are as follows: by setting the mounting frame 5, the detection device can be conveniently installed at the frosting position in the heat pump unit; by setting the sensing component, after sensing the current temperature in the heat pump unit and controlling the electric push rod 4 to start, the trigger detection component 2 is pushed to detect the frosting condition of the heat pump unit; by controlling the setting of the trigger detection component 2, it is possible to judge whether the heat pump unit is frosted, and then determine the defrosting timing, thereby achieving higher energy efficiency.

[0030] Example 2

[0031] Based on Example 1, please refer to Figure 1-2 The sensing component includes: guide columns 10, two groups of guide columns 10 are fixedly connected to the inner wall of the sealing shell 7 respectively, and the outer walls of the two groups of guide columns 10 are movably sleeved with U-shaped guide members 13, and a push plate 9 is fixedly provided between the two groups of U-shaped guide members 13.

[0032] Preferably, a sealed cavity is formed between the sealing housing 7 and the guide column 10 , the U-shaped guide member 13 and the push plate 9 , and the cavity is filled with mercury 8 .

[0033] Preferably, one end of the connecting spring 6 is fixedly connected to the push plate 9 , the other end of the connecting spring 6 is fixedly connected to the sealing shell 7 , the trigger electrode 1 11 is fixedly connected to the guide column 10 , and the trigger electrode 2 12 is fixedly connected to the U-shaped guide 13 .

[0034] The working principle and beneficial effects of the above technical solution are as follows: when the ambient temperature of the heat pump unit is in the process of frosting, the temperature of the mounting shell 1 and the sealing shell 7 connected thereto will gradually decrease. At this time, the volume of the mercury 85 will continue to decrease as the temperature continues to decrease, so that the connecting spring 6 drives the two sets of U-shaped guide members 13 to move along the outer wall of the guide column 10 by pushing the push plate 9, while the trigger electrode 1 11 and the trigger electrode 2 12 are in contact, thereby controlling the electric push rod 4 to start and push the trigger detection component 2 to the outward extension through the fixed bracket 3 to detect the frosting condition.

[0035] Example 3

[0036] Based on any one of Examples 1-2, please refer to Figure 3-4The trigger detection assembly 2 includes: a detection box 14, a fixed bracket 3 fixedly connected to the detection box 14, one end of a push rod 17 movably extends into the detection box 14 and is fixedly provided with a contact 23, the other end of the push rod 17 is fixedly provided with a push head 16, and a temperature sensor is installed in the push head 16, and a reset spring 15 is fixedly sleeved on one end of the push rod 17 extending from the outer wall of the detection box 14.

[0037] Preferably, the push rod 17 is arranged on the outer wall of the detection box 14 and is installed with a bearing seat 22, the threaded rod 18 is rotatably connected to the outer wall of the push rod 17 through the bearing seat 22, the threaded sleeve 20 and the gear 21 are both sleeved on the outer wall of the threaded rod 18, and the threaded sleeve 20 is connected to the threaded rod 18 by threads, and the gear 21 is fixedly connected to the threaded rod 18.

[0038] Preferably, the tooth plate 29 is fixedly connected to the inner wall of the detection box 14, and the gear 21 is meshed with the tooth plate 29, a limiting groove is opened on the U-shaped bracket 19, and the threaded sleeve 20 is arranged in the limiting groove of the U-shaped bracket 19 and is movably connected to the U-shaped bracket 19.

[0039] Preferably, a guide slot 25 is provided on the inner wall of the detection box 14, a guide plate 26 is movably arranged in the guide slot 25, and the guide plate 26 is fixedly connected to the U-shaped bracket 19, one end of the first connecting rod 27 is fixedly connected to the guide plate 26, and the other end of the first connecting rod 27 is fixedly provided with a contact three 28.

[0040] Preferably, one end of the power connection block 30 is fixedly connected to the inner wall of the detection box 14 , and the other end of the power connection block 30 is fixedly provided with a second contact 24 .

[0041] Preferably, the two groups of threaded rods 18 have opposite rotation directions.

[0042] Preferably, the temperature sensor can be selected from the following models: P0.430.GJ2L1000\P0.555.W8.GJ2L0500 from Maser Technology.

[0043] The working principle and beneficial effects of the above technical solution are as follows: in the initial stage, the contact point 3 28 is in contact with the power connection block 30. When the sensing component controls the electric push rod 4 to start and pushes the trigger detection component 2 to move outward through the fixed bracket 3, the push head 16 arranged on the push rod 17 abuts against the frosted part of the heat pump unit. If frosting has already occurred, the thickness of the inner wall at that place will increase due to the frosting. After the push head 16 abuts against the frosted part, the push rod 17 will slide in the direction close to the power connection block 30 due to the increased frost thickness. At this time, the two groups of threaded rods 18 also move in the same direction. Since the gear 21 and the tooth plate 29 are meshed with each other, the two groups of threaded rods 18 will rotate. Since the threaded sleeves 20 are arranged in the limiting groove of the U-shaped bracket 19, the two groups of threaded rods 18 will drive the two groups of threaded sleeves 20 to move in the direction away from each other, thereby The two groups of U-shaped brackets 19 are also driven to move in the direction away from each other. The two groups of U-shaped brackets 19 will drive contact three 28 to leave the power connection block 30 through the guide plate 26 and the first connecting rod 27, and then contact two 24 will be energized. At the same time, after the push rod 17 drives contact one 23 to contact contact two 24, it means that the thickness of the frost has reached the state that needs to be cleaned. Contact one 23 and contact two 24 are connected to send a control signal to control the electric push rod 4 to close and control the heat pump unit to defrost. When the defrost is completed, the mercury 8 expands due to the heat, and the trigger electrode one 11 and the trigger electrode two 12 are disconnected to send a control signal to the electric push rod 4 to retract. At the same time, the reset spring 15 drives the push rod 17 to reset, and contact one 23 and contact two 24 are no longer in contact, until contact three 28 abuts against the power connection block 30, and a control signal is sent to the heat pump unit to stop defrosting and wait for the next start.

[0044] Among them, the setting of the temperature sensor in the push head 16 is used to determine whether the thickening is caused by the presence of foreign matter or the increase in thickness is caused by frost (that is, when the value measured by the temperature sensor is within the threshold range, it is judged as frost, and the heat pump unit can be controlled to defrost only after contact 1 23 and contact 2 24 are in contact. If it is no longer within the threshold range, contact 1 23 and contact 2 24 are in contact to send an alarm signal to remind the user to inspect the heat pump unit and clean up the debris).

[0045] By controlling the setting of the trigger detection component 2, it is possible to judge whether the heat pump unit is frosted, and then determine the defrosting time, thereby achieving higher energy efficiency.

[0046] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A frost detection device for a low ambient temperature heat pump, characterized in that: include: A trigger detection component (2) is provided in the installation shell (1), and the trigger detection component (2) is installed on a fixed bracket (3). The fixed end of the electric push rod (4) is fixedly connected to the inner wall of the installation shell (1), the output end of the electric push rod (4) is fixedly connected to the fixed bracket (3), the sealed shell (7) is fixedly connected to the inner wall of the installation shell (1), and a sensing component is provided in the sealed shell (7).

2. A frost detection device for a low ambient temperature heat pump according to claim 1, characterized in that: Three groups of mounting frames (5) are fixedly arranged around the outer wall of the mounting shell (1), and threaded holes for connection are provided on the mounting frames (5).

3. A frost detection device for a low ambient temperature heat pump according to claim 1, characterized in that: The induction component comprises: guide columns (10), two groups of guide columns (10) are respectively fixedly connected to the inner wall of the sealing shell (7), and the outer walls of the two groups of guide columns (10) are movably sleeved with U-shaped guide pieces (13), and a push plate (9) is fixedly arranged between the two groups of U-shaped guide pieces (13).

4. A frost detection device for a low ambient temperature heat pump as claimed in claim 3, characterized in that: A sealed cavity is formed between the sealing housing (7), the guide column (10), the U-shaped guide member (13) and the push plate (9), and the cavity is filled with mercury (8).

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