Refrigeration systems and methods
US-2021123637-A1 · Apr 29, 2021 · US
Chilling unit
US12038210B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12038210-B2 |
| Application number | US-201917611776-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 7, 2019 |
| Priority date | Aug 7, 2019 |
| Publication date | Jul 16, 2024 |
| Grant date | Jul 16, 2024 |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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Abstract
Official abstract text for this publication.
A chilling unit includes a casing, a refrigerant circuit in which a compressor, a heat-source heat exchanger, a first expansion unit, a second expansion unit, and a refrigerant-to-heat medium heat exchanger are connected by a refrigerant pipe and through which refrigerant flows, the refrigerant circuit being placed in the casing, and an injection circuit in which a portion between the first expansion unit and the second expansion unit is connected to the compressor by an injection pipe, the injection circuit being placed in the casing.
First claim
Opening claim text (preview).
The invention claimed is: 1. A chilling unit comprising: a casing having a machine chamber: a refrigerant circuit in which a compressor, a heat-source heat exchanger, a first expansion unit, a second expansion unit, and a refrigerant-to-heat medium heat exchanger are connected by a refrigerant pipe and through which refrigerant flows, the refrigerant circuit being placed in the casing; an injection circuit in which a portion between the first expansion unit and the second expansion unit is connected to the compressor by an injection pipe, the injection circuit being placed in the casing; and a control unit comprising one of a processor and a circuit configured to fully open the first expansion unit and adjust an opening degree of the second expansion unit in a cooling operation, wherein the refrigerant-to-heat medium heat exchanger and the compressor are located in the machine chamber, and the heat-source heat exchanger is located on top of the machine chamber, the heat-source heat exchanger comprises a first heat-source heat exchanger, a second heat-source heat exchanger, a third heat-source heat exchanger, and a fourth heat-source heat exchanger, each of the first heat-source heat exchanger, the second heat-source heat exchanger, the third heat-source heat exchanger, and the fourth heat-source heat exchanger is L-shaped and comprises a short side portion and a long side portion, the long side portion of the first heat-source heat exchanger and the long side portion of the second heat-source heat exchanger face each other in a lateral direction of the machine chamber, the short side portion of the first heat-source heat exchanger and the short side portion of the second heat-source heat exchanger face each other in a longitudinal direction of the machine chamber, the long side portion of the third heat-source heat exchanger and the long side portion of the fourth heat-source heat exchanger face each other in the lateral direction of the machine chamber, and the short side portion of the third heat-source heat exchanger and the short side portion of the fourth heat-source heat exchanger face each other in the longitudinal direction of the machine chamber. 2. The chilling unit of claim 1 , wherein a distance between the first expansion unit and the second expansion unit is 1 m or less. 3. The chilling unit of claim 1 , wherein the injection pipe communicates with a suction chamber of the compressor. 4. A chilling unit comprising: a casing having a machine chamber: a refrigerant circuit in which a compressor, a heat-source heat exchanger, a first expansion unit, a second expansion unit, and a refrigerant-to-heat medium heat exchanger are connected by a refrigerant pipe and through which refrigerant flows, the refrigerant circuit being placed in the casing; an injection circuit in which a portion between the first expansion unit and the second expansion unit is connected to the compressor by an injection pipe, the injection circuit being placed in the casing; and a control unit comprising one of a processor and a circuit configured to fully open the second expansion unit and adjust an opening degree of the first expansion unit in a heating operation, wherein the refrigerant-to-heat medium heat exchanger and the compressor are located in the machine chamber, and the heat-source heat exchanger is located on top of the machine chamber, the heat-source heat exchanger comprises a first heat-source heat exchanger, a second heat-source heat exchanger, a third heat-source heat exchanger, and a fourth heat-source heat exchanger, each of the first heat-source heat exchanger, the second heat-source heat exchanger, the third heat-source heat exchanger, and the fourth heat-source heat exchanger is L-shaped and comprises a short side portion and a long side portion, the long side portion of the first heat-source heat exchanger and the long side portion of the second heat-source heat exchanger face each other in a lateral direction of the machine chamber, the short side portion of the first heat-source heat exchanger and the short side portion of the second heat-source heat exchanger face each other in a longitudinal direction of the machine chamber, the long side portion of the third heat-source heat exchanger and the long side portion of the fourth heat-source heat exchanger face each other in the lateral direction of the machine chamber, and the short side portion of the third heat-source heat exchanger and the short side portion of the fourth heat-source heat exchanger face each other in the longitudinal direction of the machine chamber. 5. The chilling unit of claim 1 , wherein the first heat-source heat exchanger and the second heat-source heat exchanger are inclined such that a distance between an end of the first heat-source heat exchanger adjacent to the machine chamber and an end of the second heat-source heat exchanger adjacent to the machine chamber is smaller than a distance between an end of the first heat-source heat exchanger remote from the machine chamber and an end of the second heat-source heat exchanger remote from the machine chamber, and the third heat-source heat exchanger and the fourth heat-source heat exchanger are inclined such that a distance between an end of the third heat-source heat exchanger adjacent to the machine chamber and an end of the fourth heat-source heat exchanger adjacent to the machine chamber is smaller than a distance between an end of the third heat-source heat exchanger remote from the machine chamber and an end of the fourth heat-source heat exchanger remote from the machine chamber. 6. The chilling unit of claim 5 , wherein the first heat-source heat exchanger, the second heat-source heat exchanger, the third heat-source heat exchanger, and the fourth heat-source heat exchanger are each inclined at an angle between 65 degrees and 80 degrees from horizontal. 7. The chilling unit of claim 4 , wherein the first heat-source heat exchanger and the second heat-source heat exchanger are inclined such that a distance between an end of the first heat-source heat exchanger adjacent to the machine chamber and an end of the second heat-source heat exchanger adjacent to the machine chamber is smaller than a distance between an end of the first heat-source heat exchanger remote from the machine chamber and an end of the second heat-source heat exchanger remote from the machine chamber, and the third heat-source heat exchanger and the fourth heat-source heat exchanger are inclined such that a distance between an end of the third heat-source heat exchanger adjacent to the machine chamber and an end of the fourth heat-source heat exchanger adjacent to the machine chamber is smaller than a distance between an end of the third heat-source heat exchanger remote from the machine chamber and an end of the fourth heat-source heat exchanger remote from the machine chamber. 8. The chilling unit of claim 7 , wherein the first heat-source heat exchanger, the second heat-source heat exchanger, the third heat-source heat exchanger, and the fourth heat-source heat exchanger are each inclined at an angle between 65 degrees and 80 degrees from horizontal.
Assignees
Inventors
Classifications
by injecting a liquid · CPC title
Indoor unit with water as a heat sink or heat source · CPC title
Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator · CPC title
Expansion means; Dispositions thereof · CPC title
Economiser valves · CPC title
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Frequently asked questions
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- What does patent US12038210B2 cover?
- A chilling unit includes a casing, a refrigerant circuit in which a compressor, a heat-source heat exchanger, a first expansion unit, a second expansion unit, and a refrigerant-to-heat medium heat exchanger are connected by a refrigerant pipe and through which refrigerant flows, the refrigerant circuit being placed in the casing, and an injection circuit in which a portion between the first exp…
- Who is the assignee on this patent?
- Mitsubishi Electric Corp
- What technology area does this patent fall under?
- Primary CPC classification F25B41/385. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jul 16 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).