# US 2024/0200828 A1 · Fan and Heat Pump Type Water Heater Using Same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0200828 A1 - Document ID: US20240200828A1 - Status: Published application - Kind: A1 - Application number: 18/287,113 - Filed: 2022-04-18 - Published: 2024-06-20 - Earliest claimed: 2021-04-16 - Assignees: Rheem (China) Water Heater Co., Ltd. - Applicants: Rheem (China) Water Heater Co., Ltd. - Inventors: Fei Wang; Min Wu; Wen Luo - Web page: https://patentgrep.com/patent/US20240200828A1 ## CPC - F24H 4/04: Storage heaters - F04D 17/00: Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (F04D21/00 takes precedence) - F04D 29/283: {rotors of the squirrel-cage type} - F04D 29/422: {Discharge tongues (F04D17/04 takes precedence)} - F04D 29/424: {Double entry casings} - F24H: FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL (steam generation F22) - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) ## Abstract The present invention relates to the field of heat pump water heaters. Disclosed are a fan and a heat pump type water heater using same. The fan of the present invention is mounted upside down in an upper space of a water tank for pumping air refrigerated by an evaporator in the heat pump type water heater; the fan comprises volutes, a partition plate, and an impeller, the impeller is arranged in the volutes, the volutes are designed as an involute structure, and volute tongues of the volutes are in a backscrolling shape; there are two volutes, the partition plate is arranged between the two volutes, spiral shafts of the two volutes are perpendicular to the partition plate, and the two volutes are symmetrically arranged; an air inlet is formed in the side wall of each volute distant from the partition plate, the air inlets are perpendicular to the spiral shafts of the volutes, and air outlet directions of the air outlets of the two volutes are the same. The integrated heat pump water heater of the present invention can achieve effects such as high energy efficiency, large heating capacity, and low noise in a limited space mainly by means of optimization of a wind field of the whole system and reasonable layout of components. ## Claims ### Claim 1 A fan for a heat pump type water heater, comprising: two volutes (8); a partition plate (9) arranged between the two volutes; and impellers, wherein the impellers are arranged in the volutes (8), rotating shafts of the impellers are located on spiral axes of the volutes (8) and are in shaft connection to transmission shafts in the volutes (8); wherein the volutes (8) are designed as an involute structure, and volute tongues (13) of the volutes are in a backscrolling shape; wherein spiral shafts of the two volutes (8) are perpendicular to the partition plate (9), and the two volutes (8) take the partition plate (9) as a symmetrical face and are symmetrically arranged; and wherein an air inlet (6) is formed in a side wall of each volute (8) distant from the partition plate (9), the air inlets (6) are perpendicular to the spiral shafts of the volutes (8), and air outlet directions of air outlets (7) of the two volutes (8) are the same: ### Claim 2 (depends on 1) A heat pump type water heater, comprising: a condenser; and a water tank (1); and a heat pump system arranged on top of the water tank (1); wherein the heat pump system comprises a housing (2), in which the fan (3) according to claim 1 is arranged along with evaporators (4), a compressor (5) and a throttling device (14); wherein an air outlet port of the compressor (5) is connected to an air inlet port of the condenser, a liquid outlet of the condenser is connected to a liquid inlet of the throttling device (14), a liquid outlet of the throttling device (14) is connected to liquid inlets of the evaporators (4), and air outlet ports of the evaporators (4) are connected to an air inlet port of the compressor (5); and wherein the fan (3) is arranged beside the evaporators (4) and is used for pumping out air cooled by the evaporators (4). ### Claim 3 (depends on 2) The heat pump type water heater according to claim 2, wherein the air outlet directions of the air outlets (7) of the two volutes (8) are horizontal, and the air outlets (7) are located on lower sides of the air inlets (6). ### Claim 4 (depends on 2) The heat pump type water heater according to claim 2, wherein axes of the impellers are horizontal. ### Claim 5 (depends on 2) The heat pump type water heater according to claim 2, wherein the evaporators (4) are plate evaporators, the two sets of evaporators (4) are symmetrically arranged on both sides of the partition plate (9), and plate faces of the evaporators (4) are opposite to the air inlets (6) of the volutes (8), respectively. ### Claim 6 (depends on 5) The heat pump type water heater according to claim 5, wherein distances between the air inlets (6) and the evaporators (4) are 30-90 mm. ### Claim 7 (depends on 5) The heat pump type water heater according to claim 5, wherein a lattice baffle (12) is connected between the two sets of evaporators (4), the lattice baffle (12) is arranged vertically, the lattice baffle (12) is located on the sides of the volutes (8) and is distant from the air outlets of the volutes, and the compressor (5) is arranged on the face, distant from the air outlets (7), of the lattice baffle (12). ### Claim 8 (depends on 5) The heat pump type water heater according to, claim 5, wherein vertical distances between vertical center lines of the evaporators (4) and an axis of the fan (3) are 0-125 mm, and horizontal distances between horizontal center lines of the evaporators (4) and the axis of the fan (3) are 0-50 mm. ### Claim 9 (depends on 5) The heat pump type water heater according to claim 5, wherein air inlet ports (10) are arranged at positions, corresponding to the evaporators (4), on the housing (2), and air outlet ports (11) are arranged at positions, corresponding to the air outlets (7), on the housing (2). ### Claim 10 (depends on 5) The heat pump type water heater according to claim 5, wherein the two sets of plate evaporators are arranged in parallel.