Container assembled ultra-low temperature mute anti-freezing screw air source heat pump unit
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING JINGTIAN SMART ENERGY TECH CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-06-05
Smart Images
Figure CN224327382U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of screw air source heat pump manufacturing, and in particular to a containerized, assembled, ultra-low temperature, silent, and antifreeze screw air source heat pump unit. Background Technology
[0002] A screw-type air source heat pump is a high-efficiency device that extracts heat energy from the air for cooling / heating, with a screw compressor as its core component. Its core advantages lie in its strong low-temperature heating capacity, stable operation, and long lifespan, making it widely used in large building heating and industrial hot water applications. However, the compressor in a screw-type air source heat pump is noisy, requiring external noise reduction measures during operation. Existing noise reduction technologies are generally ineffective, resulting in noise still affecting the surrounding environment, especially in residential areas, where nighttime operation disturbs residents' rest. Furthermore, screw-type air source heat pump units have circulating water. When operation stops, the water system ceases operation, leaving uncirculated water in the unit, posing a freezing risk. If the uncirculated water freezes, the water system will crack, leading to unit damage. Utility Model Content
[0003] The purpose of this invention is to provide a container-mounted ultra-low temperature silent antifreeze screw air source heat pump unit to solve the problems existing in the prior art. This allows the compressor, which is the source of noise, to be installed inside the container, creating a dual noise reduction effect through the absorption and reduction of noise by the insulation layer and the sealing and noise reduction of the container body. The heater can raise the internal temperature of the container, and when the screw air source heat pump is not working, the non-circulating water will not freeze, protecting the unit and preventing damage.
[0004] To achieve the above objectives, this utility model provides the following solution:
[0005] This utility model provides a container-mounted ultra-low temperature silent antifreeze screw air source heat pump unit, including a container body, a noise reduction and heat preservation layer and a heater are provided inside the container body, the noise reduction and heat preservation layer is installed on the inner surface of the container body; the heat pump unit is arranged inside the container body, the heat pump unit includes an internal working unit installed inside the container body and an external working unit installed outside the container body, the internal working unit includes a compressor.
[0006] In one embodiment, the noise-reducing and heat-insulating layer is disposed on the inner surface of each panel and the inner surface of each door panel of the container body.
[0007] In one embodiment, the noise-reducing and heat-insulating layer includes an extruded polystyrene board with a polyurethane foam layer disposed thereon.
[0008] In one embodiment, the heater is a positive temperature coefficient heater.
[0009] In one embodiment, the number of heaters is one, one of which is disposed on the inner surface of the top panel of the container body, three of which are disposed on the three inner surfaces of the three side panels of the container body, and one of which is installed on the inner surface of the door panel of the container body; the heating area of the heater is 0.3 square meters.
[0010] In one embodiment, the container body panel includes an outer corrugated steel sheet and a flame-retardant fiberglass reinforced plastic (FRP) sheet. The outer corrugated steel sheet is disposed on the outside of the container body, and the flame-retardant FRP sheet is disposed on the inside of the container body and is attached to the outer corrugated steel sheet.
[0011] In one embodiment, a photovoltaic power generation panel is installed on the outer side of the side panel of the container body, and a transformer is installed inside the container body. The output end of the photovoltaic power generation panel is connected to the input end of the transformer, and the output end of the transformer is connected to the input end of the heater.
[0012] In one embodiment, the top panel of the container body has pre-drilled connection holes.
[0013] In one embodiment, the external working unit includes a fan and a first evaporator-condenser, the fan being mounted on the first evaporator-condenser; a first end of a first heat exchange pipe is connected to a first working end of the first evaporator-condenser, and a second end of the first heat exchange pipe passes through the reserved connection hole to connect to the internal working unit; a first end of a second heat exchange pipe is connected to a second working end of the first evaporator-condenser, and a second end of the second heat exchange pipe passes through the reserved connection hole to connect to the internal working unit.
[0014] In one embodiment, the internal working unit includes a second evaporator-condenser, the first working end of which is connected to the first port of a four-way reversing valve; the first working end of the compressor is connected to the second port of the four-way reversing valve, the second working end of the compressor is connected to the first working end of a gas-liquid separator, and the second working end of the gas-liquid separator is connected to the third port of the four-way reversing valve; the working circulation section includes a circulation pipe, an electronic expansion valve, a reversing valve, and a liquid receiver, the first working end of the electronic expansion valve is connected to the circulation pipe, the second working end of the electronic expansion valve is connected to the first working end of the reversing valve, the second working end of the reversing valve is connected to the first working end of the liquid receiver, and the second working end of the liquid receiver is connected to the circulation pipe. The circulation pipe is divided into a first part and a second part by the first working end of the electronic expansion valve and the second working end of the liquid reservoir. The first part is provided with a first check valve and a second check valve, and the second part is provided with a third check valve and a fourth check valve. The flow direction of the first check valve, the second check valve, the third check valve and the fourth check valve is towards the first working end of the electronic expansion valve. The second end of the first heat exchange pipe is connected to the first valve port of the four-way reversing valve, and the second end of the second heat exchange pipe is connected to the circulation pipe between the first check valve and the second check valve. The second working end of the second evaporation and condensation device is connected to the circulation pipe between the third check valve and the fourth check valve.
[0015] The present invention achieves the following technical advantages over the prior art:
[0016] This invention provides a container-mounted ultra-low temperature silent antifreeze screw air source heat pump unit. The compressor, a noise source, is installed inside the container, creating a dual noise reduction effect through the absorption of noise from the insulation layer and the sealing of the container. The heater raises the internal temperature of the container, and when the screw air source heat pump is not operating, the non-circulating water will not freeze, protecting the unit and preventing damage. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a top view of a container body according to an embodiment of the present utility model;
[0019] Figure 2 for Figure 1Sectional view along line AA;
[0020] Figure 3 for Figure 1 Sectional view along the BB direction;
[0021] Figure 4 for Figure 2 Enlarged view of position C in the middle;
[0022] Figure 5 This is a schematic diagram showing the arrangement of a prefabricated screw air source heat pump unit in an embodiment of this utility model;
[0023] Figure 6 This is a schematic diagram of the overall structure of an assembled screw air source heat pump unit according to an embodiment of the present utility model.
[0024] Among them, 1. Container body; 101. Noise-reducing and heat-insulating layer; 102. Heater; 103. Outer corrugated steel plate; 104. Flame-retardant fiberglass;
[0025] 2. Heat pump unit components; 201. Fan; 202. First evaporator-condenser unit; 203. First heat exchange pipeline; 204. Second heat exchange pipeline; 205. Second evaporator-condenser unit; 206. Four-way reversing valve; 207. Circulation pipe; 208. Compressor; 209. Gas-liquid separator; 210. Electronic expansion valve; 211. Reversing valve; 212. Liquid receiver; 213. First check valve; 214. Second check valve; 215. Third check valve; 216. Fourth check valve. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0027] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the implementation of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed herein. In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are merely for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Therefore, features specified with "first," "second," etc., may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "multiple" means two or more.
[0028] It should also be noted that in the embodiments of this application, the same reference numerals are used to denote the same component or the same part.
[0029] The purpose of this invention is to provide a container-mounted ultra-low temperature silent antifreeze screw air source heat pump unit to solve the problems existing in the prior art. This allows the compressor, which is the source of noise, to be installed inside the container, creating a dual noise reduction effect through the absorption and reduction of noise by the insulation layer and the sealing and noise reduction of the container body. The heater can raise the internal temperature of the container, and when the screw air source heat pump is not working, the non-circulating water will not freeze, protecting the unit from damage.
[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0031] like Figures 1-6As shown, this utility model provides a containerized, ultra-low temperature, silent, anti-freeze screw air source heat pump unit, including a container body 1. A noise-reducing insulation layer 101 and a heater 102 are installed inside the container body 1. The noise-reducing insulation layer 101 is installed on the inner surface of the container body 1. A heat pump assembly 2 is installed inside the container body 1. The heat pump assembly 2 includes an internal working unit installed inside the container body 1 and an external working unit installed outside the container body 1. The internal working unit includes a compressor 208. The compressor 208, located inside the container body 1, directly absorbs and intercepts its noise, resulting in effective noise reduction. The external working unit is a necessary device for heat exchange between the screw air source heat pump and the external air environment and needs to be installed outside the container body 1.
[0032] In one embodiment, the noise-reducing and heat-insulating layer 101 is disposed on the inner surface of each panel and the inner surface of each door panel of the container body 1.
[0033] In one embodiment, the noise-reducing insulation layer 101 includes an extruded polystyrene (XPS) board with a polyurethane foam layer disposed on the XPS board. XPS board is a closed-cell rigid foam insulation material formed through an extrusion process, possessing characteristics such as high strength, low thermal conductivity, moisture resistance, and pressure resistance. The polyurethane foam layer is lightweight, heat-insulating, sound-insulating, and waterproof. The composite structure of the XPS board and the polyurethane foam layer reliably achieves both noise insulation and heat preservation functions simultaneously.
[0034] In one embodiment, the noise-reducing insulation layer 101 is 100 mm thick, and the extruded polystyrene board and polyurethane foam layer are each 50 mm thick. In this configuration, the container body 1 can reduce noise from 80 dB to 65 dB.
[0035] In one embodiment, heater 102 is a positive temperature coefficient (PTC) heater. The core characteristic of a PTC heater is that the heating material has low resistance at low temperatures, allowing for rapid heating due to a large current when energized. When the heating material reaches a certain temperature (Curie temperature), the resistance increases sharply, the current decreases sharply, and the heat output automatically decreases, achieving self-limiting temperature control. Preferably, the heating element of heater 102 is a barium titanate ceramic heating element.
[0036] In one embodiment, there are five heaters 102, one of which is located on the inner surface of the top panel of the container body 1, three heaters 102 are located on the three inner surfaces of the three side panels of the container body 1, and one heater 102 is installed on the inner surface of the door panel of the container body 1. The heating area of the heaters 102 is 0.3 square meters.
[0037] In one embodiment, the container body 1 has a panel comprising an outer corrugated steel sheet 103 and a flame-retardant fiberglass 104. The outer corrugated steel sheet 103 is disposed on the outside of the container body 1, and the flame-retardant fiberglass 104 is disposed on the inside of the container body 1 and is attached to the outer corrugated steel sheet 103.
[0038] In one embodiment, a photovoltaic power generation panel is installed on the outer side of the side panel of the container body 1, and a transformer is installed inside the container body 1. The output end of the photovoltaic power generation panel is connected to the input end of the transformer, and the output end of the transformer is connected to the input end of the heater 102.
[0039] In one embodiment, the top panel of the container body 1 has reserved connection holes.
[0040] In one embodiment, the external working unit includes a fan 201 and a first evaporative condenser 202, with the fan 201 mounted on the first evaporative condenser 202. A first end of a first heat exchange pipe 203 is connected to a first working end of the first evaporative condenser 202, and a second end of the first heat exchange pipe 203 passes through a pre-drilled connection hole to connect to the internal working unit. A first end of a second heat exchange pipe 204 is connected to a second working end of the first evaporative condenser 202, and a second end of the second heat exchange pipe 204 passes through a pre-drilled connection hole to connect to the internal working unit. Preferably, the external working unit is located on the top of the container body 1 to reduce the installation length of the first heat exchange pipe 203 and the second heat exchange pipe 204.
[0041] In one embodiment, the internal working unit includes a second evaporator-condenser 205, the first working end of which is connected to the first port of a four-way reversing valve 206. The first working end of a compressor 208 is connected to the second port of the four-way reversing valve 206, and the second working end of the compressor 208 is connected to the first working end of a gas-liquid separator 209. The second working end of the gas-liquid separator 209 is connected to the third port of the four-way reversing valve 206. The working circulation section includes a circulation pipe 207, an electronic expansion valve 210, a reversing valve 211, and a liquid receiver 212. The first working end of the electronic expansion valve 210 is connected to the circulation pipe 207, the second working end of the electronic expansion valve 210 is connected to the first working end of the reversing valve 211, the second working end of the reversing valve 211 is connected to the first working end of the liquid receiver 212, and the second working end of the liquid receiver 212 is connected to the circulation pipe 207. The first working end of the electronic expansion valve 210 and the second working end of the liquid receiver 212 divide the circulation pipe 207 into a first part and a second part. The first part is equipped with a first check valve 213 and a second check valve 214, and the second part is equipped with a third check valve 215 and a fourth check valve 216. The flow direction of the first check valve 213, the second check valve 214, the third check valve 215, and the fourth check valve 216 is towards the first working end of the electronic expansion valve 210. The second end of the first heat exchange pipe 203 is connected to the first valve port of the four-way reversing valve 206, and the second end of the second heat exchange pipe 204 is connected to the circulation pipe 207 between the first check valve 213 and the second check valve 214. The second working end of the second evaporation and condensation device 205 is connected to the circulation pipe 207 between the third check valve 215 and the fourth check valve 216.
[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0043] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured using a casting process) (except where it is obviously impossible to use an integral forming process).
[0044] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.
[0045] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.
[0046] Any adaptive changes made according to actual needs are within the protection scope of this utility model.
[0047] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0048] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A containerized, prefabricated, ultra-low temperature, silent, antifreeze screw air source heat pump unit, characterized in that: Includes a container body (1), wherein a noise reduction and heat insulation layer (101) and a heater (102) are provided inside the container body (1), and the noise reduction and heat insulation layer (101) is installed on the inner surface of the container body (1); The heat pump unit (2) is disposed inside the container body (1). The heat pump unit (2) includes an internal working unit installed inside the container body (1) and an external working unit installed outside the container body (1). The internal working unit includes a compressor (208).
2. The containerized prefabricated ultra-low temperature silent antifreeze screw air source heat pump unit according to claim 1, characterized in that: The noise reduction and heat insulation layer (101) is disposed on the inner surface of each panel and the inner surface of each door panel of the container body (1).
3. The containerized prefabricated ultra-low temperature silent antifreeze screw air source heat pump unit according to claim 1, characterized in that: The noise reduction and heat insulation layer (101) includes an extruded polystyrene board, on which a polyurethane foam layer is disposed.
4. The containerized prefabricated ultra-low temperature silent antifreeze screw air source heat pump unit according to claim 1, characterized in that: The heater (102) is a positive temperature coefficient heater.
5. The containerized prefabricated ultra-low temperature silent antifreeze screw air source heat pump unit according to claim 4, characterized in that: The number of heaters (102) is 5, one of which is located on the inner surface of the top panel of the container body (1), three of which are located on the three inner surfaces of the three side panels of the container body (1), and one of which is installed on the inner surface of the door panel of the container body (1). The heating area of the heater (102) is 0.3 square meters.
6. The containerized prefabricated ultra-low temperature silent antifreeze screw air source heat pump unit according to claim 1, characterized in that: The container body (1) has a panel consisting of an outer corrugated steel plate (103) and a flame-retardant fiberglass (104). The outer corrugated steel plate (103) is disposed on the outside of the container body (1), and the flame-retardant fiberglass (104) is disposed on the inside of the container body (1) and is attached to the outer corrugated steel plate (103).
7. The containerized prefabricated ultra-low temperature silent antifreeze screw air source heat pump unit according to claim 1, characterized in that: A photovoltaic power generation panel is installed on the outside of the side panel of the container body (1), and a transformer is installed inside the container body (1). The output end of the photovoltaic power generation panel is connected to the input end of the transformer, and the output end of the transformer is connected to the input end of the heater (102).
8. The containerized prefabricated ultra-low temperature silent antifreeze screw air source heat pump unit according to any one of claims 1 to 7, characterized in that: The top panel of the container body (1) has reserved connection holes.
9. The containerized prefabricated ultra-low temperature silent antifreeze screw air source heat pump unit according to claim 8, characterized in that: The external working unit includes a fan (201) and a first evaporation and condensation device (202), wherein the fan (201) is mounted on the first evaporation and condensation device (202); The first end of the first heat exchange pipe (203) is connected to the first working end of the first evaporation and condensation device (202), and the second end of the first heat exchange pipe (203) passes through the reserved connection hole and is connected to the internal working unit. The first end of the second heat exchange pipeline (204) is connected to the second working end of the first evaporation and condensation device (202), and the second end of the second heat exchange pipeline (204) passes through the reserved connection hole and is connected to the internal working unit.
10. The containerized prefabricated ultra-low temperature silent antifreeze screw air source heat pump unit according to claim 9, characterized in that: The internal working unit also includes a second evaporation and condensation device (205), the first working end of which is connected to the first valve port of a four-way reversing valve (206); The first working end of the compressor (208) is connected to the second valve port of the four-way reversing valve (206), the second working end of the compressor (208) is connected to the first working end of the gas-liquid separator (209), and the second working end of the gas-liquid separator (209) is connected to the third valve port of the four-way reversing valve (206). The working circulation section includes a circulation pipe (207), an electronic expansion valve (210), a reversing valve (211), and a reservoir (212). The first working end of the electronic expansion valve (210) is connected to the circulation pipe (207), the second working end of the electronic expansion valve (210) is connected to the first working end of the reversing valve (211), the second working end of the reversing valve (211) is connected to the first working end of the reservoir (212), and the second working end of the reservoir (212) is connected to the circulation pipe (207). The first working end of the electronic expansion valve (210) and the second working end of the reservoir (212) divide the circulation pipe (207) into a first part and a second part. The first part is provided with a first check valve (213) and a second check valve (214), and the second part is provided with a third check valve (215) and a fourth check valve (216). The flow direction of the first check valve (213), the second check valve (214), the third check valve (215) and the fourth check valve (216) is towards the first working end of the electronic expansion valve (210). The second end of the first heat exchange pipeline (203) is connected to the first valve port of the four-way reversing valve (206), the second end of the second heat exchange pipeline (204) is connected to the circulation pipe (207) between the first one-way valve (213) and the second one-way valve (214), and the second working end of the second evaporation and condensation device (205) is connected to the circulation pipe (207) between the third one-way valve (215) and the fourth one-way valve (216).