Two-stage heating high temperature heat pump device
A high-temperature heat pump and secondary heating technology, applied in the field of heat pump devices
Active Publication Date: 2013-04-10
山东美琳达再生能源开发有限公司
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[0003] Although there are some high-temperature heat pump devices currently on the market, they all use the method of replacing the refrigerant with a mixed high-temperature refrigerant, and no single refrigerant is used for development.
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[0014] Referring to the accompanying drawings, the present invention consists of a low-pressure level heating system and a high-pressure level heating system. The low-pressure level heating system includes a low-pressure compressor A1, a low-pressure shell-and-tube condenser A2, a first low-pressure cut-off valve A3, a low-pressure Dry filter A4, second low-pressure cut-off valve A5, low-pressure electronic expansion valve A6, evaporator 7, low-pressure solenoid valve A8, low-pressure oil cooler A9, low-pressure thermal expansion valve A10; High-pressure compressor B1, high-pressure shell-and-tube condenser B2, first high-pressure shut-off valve B3, high-pressure dry filter B4, second high-pressure shut-off valve B5, high-pressure electronic expansion valve B6, evaporator 7, high-pressure solenoid valve B8, high-pressure oil Cooler B9, high pressure thermal expansion valve B10, economizer B11, economizer electronic expansion valve B12, check valve B13.
[0015] Heating method ...
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The invention relates to a heat pump device, in particular to a two-stage heating high temperature heat pump device, which comprises a low pressure stage heating system and a high pressure stage heating system. High temperature-pressure refrigerant discharged by a compressor enters into a shell and tube type condenser to heat hot water, then passes through a stop valve and a dry filter; a small part of the refrigerant enters into an air suction port of the compressor by passing a heating power expansion valve; the other part of the refrigerant enters into an electronic expansion valve by passing the stop valve to throttle and reduce pressure, then enters into an evaporator to absorb heat and is sucked into the compressor; after the temperature of compressor oil rises to a certain temperature, a solenoid valve is opened, the compressor oil enters into an oil cooler to be cooled by cooling water and then flows back to the compressor. The invention uses a two-stage heating way with a lowpressure stage heating system and a high pressure stage heating system to heat hot water, and the high pressure stage system is provided with an economizer to supplement gas, and the invention adds the oil cooler of the compressor and other unique designs, thereby achieving the objective of preparing high temperature hot water at 70 DEG C to 85 DEG C.
Description
1. Technical field: [0001] The invention relates to a heat pump device, in particular to a secondary heating high temperature heat pump device. 2. Background technology: [0002] At present, the outlet temperature of hot water produced by conventional heat pump devices generally does not exceed 65°C, and the temperature of the low-grade heat source absorbed cannot be too high, generally not higher than 25°C. It is mainly used in the field of building heating. The application in the industrial field is limited by the high demand for hot water outlet temperature, so it cannot be promoted on a large scale. In the field of industrial production, hot water at 70°C to 85°C is often required, and waste water at 30°C to 40°C is produced at the same time. If a heat pump device that works in these two temperature ranges can be developed, the waste heat in industrial production can be fully recovered. , It will be a very meaningful thing to prepare hot water with a temperature as high...
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IPC IPC(8): F25B30/02F25B7/00
Inventor 曹峰李钢王凯单建锡邢子文
Owner 山东美琳达再生能源开发有限公司